System and method for three-dimensional printing

Abstract

The invention provides a system for three-dimensional printing, and the system comprises a post-processing device, the post-processing device comprises a material receiving mechanism, the material receiving mechanism comprises a material receiving main body, and the material receiving main body is configured to carry a 3D printing object with redundant printing materials; and the driving mechanism is configured to allow the material receiving mechanism to rotate from the first state to the second state so that the redundant printing materials can drip from the 3D printing object, and the 3D printing object has at least two different inclination angles. According to the technical scheme disclosed by the invention, the problems of poor separation effect and low efficiency of a mode for separating the redundant printing material on the 3D printing object in the related technology are effectively solved.

Description

[0001] Related Applications

[0002] The present disclosure claims priority to the Chinese patent application filed with the Patent Office of China on November 2, 2023, with application number CN202311442987.8, and invention name “A post-processing device, method and 3D printing system for 3D printed objects”, and the Chinese patent application filed with the Patent Office of China on February 19, 2024, with application number CN 202410185490.0, and invention name “Method, device, system, storage medium and electronic device for three-dimensional printing”, the entire contents of which are incorporated by reference in the present disclosure. Technical Field

[0003] The present invention relates to the technical field of three-dimensional printing, and in particular to a system and method for three-dimensional printing. Background Art

[0004] 3D printing technology is to manufacture three-dimensional entities by layering through 3D printing equipment based on the three-dimensional model data of the object. 3D printing technology can overcome special structural obstacles that cannot be achieved by traditional mechanical processing and realize the simplified production of any complex structural parts. Current 3D printing technologies include laser stereolithography (SLA), digital light processing (DLP), liquid crystal display technology (LCD), fused deposition modeling (FDM), selective laser sintering (SLS), etc.

[0005] After 3D printing is completed, due to the properties of the printing material itself, such as the certain viscosity of the resin material, the resin material can adhere to the surface of the 3D printed object, resulting in the surface of the 3D printed object being covered with liquid resin. The presence of these resins will not only cause a large amount of material loss, but also increase the difficulty of subsequent processing. At present, the existing technology adopts a method of placing the 3D printed object on the platform for a period of time after printing is completed and then taking out the 3D printed object, so that the resin can flow back to the material tray.

[0006] However, due to the different shapes of 3D printed objects, the above-mentioned method of separating excess printing materials in the prior art has poor separation effect and low efficiency. Summary of the invention

[0007] The main purpose of the present disclosure is to provide a system, method and medium for three-dimensional printing to solve the problem that the method of separating excess printing material on a 3D printed object in the prior art has poor separation effect and low efficiency.

[0008] To achieve the above-mentioned purpose, according to one aspect of the present disclosure, a system for three-dimensional printing is provided, including a post-processing device, the post-processing device comprising: a material receiving mechanism, including a material receiving body, the material receiving body being configured to carry a 3D printed object with excess printing material; a driving mechanism, the driving mechanism being configured to allow the material receiving mechanism to rotate from a first state to a second state so that the excess printing material drips from the 3D printed object, wherein the 3D printed object has at least two different inclination angles.

[0009] In some embodiments, the drive mechanism is configured to maintain the material receiving mechanism in the first state for a first period of time.

[0010] In some embodiments, the post-processing device also includes at least one of a temperature regulating mechanism, an air outlet mechanism, and a vibration mechanism; wherein the temperature regulating mechanism is used to generate a dynamic temperature distribution and / or adjust the temperature of the area where the 3D printed object is located based on a preconfigured temperature control strategy; the air outlet mechanism is used to generate flowing gas so that the 3D printed object is placed in the flowing gas to accelerate the flow of excess printing material; the vibration mechanism is used to make the 3D printed object vibrate to accelerate the flow of excess printing material.

[0011] In some embodiments, the system also includes a 3D printing device, which includes a molding platform, a material tray and a separation device, wherein the molding platform has a molding surface, the molding surface is used to attach the 3D printed object, and the separation device is used to separate the 3D printed object from the molding surface.

[0012] In some embodiments, the material receiving body is configured to allow movement between a first position and a second position. The material receiving body is configured to receive a 3D printed object with excess printing material separated from the molding surface at the first position, and to allow the material receiving body to rotate from the first state to the second state at the second position.

[0013] In some embodiments, the system further comprises a blanking assembly, which is configured to allow movement between a first position and a second position, wherein in the first position, the blanking assembly is used to receive the 3D printed object separated from the molding surface, and in the second position, the blanking assembly transfers the 3D printed object to a receiving body.

[0014] In some embodiments, the material receiving body has an opening, a liquid outlet, and a receiving cavity for receiving a 3D printed object, and the opening and the liquid outlet are both connected to the receiving cavity.

[0015] In some embodiments, the driving mechanism further includes a first transmission mechanism, which is drivingly connected to the material receiving body to drive the material receiving body to rotate around the transverse axis.

[0016] In some embodiments, the material receiving mechanism further includes a material recovery container, which is configured to receive printing material from the material receiving body.

[0017] In some embodiments, the material receiving mechanism further includes: a first liquid receiving container and a second liquid receiving container, the first liquid receiving container being configured to receive the printing material from the material receiving body, and the second liquid receiving container being communicated with the first liquid receiving container and the material recovery container respectively;

[0018] Optionally, a liquid receiving track is provided between the second liquid receiving container and the 3D printing device.

[0019] In some embodiments, the 3D printing device further includes a pipeline for conveying the printing material into the material tray, one end of the pipeline is connected to the material recovery container, and the other end is connected to the material tray.

[0020] In some embodiments, the material receiving mechanism further includes a material receiving container, and the driving mechanism can rotate the material receiving body so that the 3D printed object moves out of the material receiving body and enters the material receiving container through an opening of the material receiving container.

[0021] In some embodiments, the separation device includes a shovel mechanism, which includes: a mounting frame; a blade, movably disposed on the mounting frame, and the blade has an initial position relative to the mounting frame; and a shovel drive assembly, used to drive at least one of the blade and the molding platform so that the blade and the molding platform move relative to each other, so as to separate the 3D printed object from the molding surface by the blade.

[0022] In some embodiments, the shovel mechanism further includes a cleaning member, which is disposed on a side close to the shovel blade. When the shovel blade moves from an initial position, one end of the cleaning member abuts against the surface of the shovel blade and slides along the surface of the shovel blade.

[0023] In some embodiments, the shovel mechanism further includes a liquid receiving member disposed on the mounting frame, the liquid receiving member having a liquid receiving port corresponding to at least one position of the scraper blade so that the liquid receiving member receives the printing material adhered to the scraper blade.

[0024] In some embodiments, the unloading component includes a receiving member and a unloading drive component. The receiving member is used to receive the 3D printed object separated from the forming platform at a first position. The unloading drive component is configured to drive the receiving member from the second position to the first position along the receiving direction, and to drive the receiving member from the first position to the second position along the feeding direction. The receiving member is provided with a drainage part, so that the printing material can be discharged from the receiving member through the drainage part during the receiving process.

[0025] In some embodiments, the 3D printing device also includes a locking mechanism for the molding platform, the locking mechanism includes: a locking member, including a fixed frame, a fixed plate and a movable block, the movable block is movably arranged on the fixed frame, the fixed plate has a mounting groove, and the mounting groove has an opening; a platform fixing member, used to connect with the molding platform, the platform fixing member can extend into the mounting groove through the opening; the fixing plate has a first clamping portion, the first end of the platform fixing member has a second clamping portion that is clamped and matched with the first clamping portion, the movable block has a locking position in which the second end of the platform fixing member is abutted and an unlocking position in which the second end of the platform fixing member is separated.

[0026] In some embodiments, the 3D printing device further includes a floating tray mechanism, the floating tray mechanism including: a base plate having a tray mounting groove, the tray mounting groove being arranged on the base plate, and a side portion of the tray mounting groove having an opening for inserting the tray;

[0027] The floating block is vertically floatably arranged below the base plate. When the floating block floats up, the upper end of the floating block can extend into the material tray mounting groove to push against the material tray. The locking assembly includes a driving member and a locking member. The driving member and the locking member are arranged on one side of the base plate or the floating block. The driving member can drive the floating block to float up. The locking member can keep the floating block floating to lock the material tray, or the locking member can keep the floating block sinking so that the material tray can be taken in and out from the opening.

[0028] In some embodiments, the 3D printing device also includes a liquid adding mechanism, which includes: a liquid adding box, having an inner cavity and a liquid inlet and a liquid outlet connected to the inner cavity; a liquid inlet pump, one end of the liquid inlet pump is connected to the liquid inlet, and the other end of the liquid inlet pump is connected to the supply container, and the liquid inlet pump is used to transport the printing material from the supply container to the liquid adding box; a liquid outlet pump, one end of the liquid outlet pump is connected to the liquid outlet, and the other end of the liquid outlet pump is connected to the material tray of the 3D printer, and the liquid outlet pump is used to transport the printing material in the liquid adding box to the material tray of the 3D printer; a controller, which is communicatively connected to the liquid inlet pump and the liquid outlet pump, and the controller is used to control the start or stop of the liquid inlet pump and the liquid outlet pump.

[0029] In some embodiments, the system also includes a cloud, which is configured as follows: the cloud obtains multiple three-dimensional models to be printed, and user case information corresponding to the multiple three-dimensional models; the cloud classifies the multiple three-dimensional models based on the user case information to obtain a target three-dimensional model that matches the target user case; the cloud allocates the classified multiple target three-dimensional models to a 3D printing device and / or a post-processing device according to a preset production strategy to produce the three-dimensional models; wherein the production strategy includes setting the target three-dimensional models belonging to the same user case in the same production sequence.

[0030] In some embodiments, the cloud is further configured as follows: the cloud determines case identifiers corresponding to multiple three-dimensional models based on user case information; uses the case identifier indicated by the target user case information as the target case identifier; determines a target three-dimensional model that matches the target case identifier among the case identifiers corresponding to multiple three-dimensional models to obtain a target three-dimensional model that matches the target user case; or, the cloud determines model upload times corresponding to multiple three-dimensional models based on user case information; and determines three-dimensional models uploaded within the same time period as target three-dimensional models for the same user case.

[0031] In some embodiments, after obtaining the target three-dimensional model that matches the target user case, the cloud is further configured as follows: the cloud performs layout processing on the target three-dimensional models belonging to the target user case respectively to obtain a target layout result that matches the target user case; the cloud distributes the target layout result to a 3D printing device for three-dimensional printing.

[0032] In some embodiments, the production sequence includes one or more printing versions, and the production strategy is configured as follows: the cloud sets the target three-dimensional model belonging to the same user case in the same printing version for printing; or, the cloud sets the target three-dimensional model belonging to the same user case in multiple printing versions, and sends the multiple printing versions to the same 3D printing device for printing; or, the cloud sets the target three-dimensional model belonging to the same user case in multiple printing versions, and sends the multiple printing versions to different 3D printing devices for printing.

[0033] In some embodiments, the production sequence includes one or more printing versions, and the production strategy is configured as follows: the cloud obtains the number of models of the target three-dimensional model matching any user case, and when the number of models is greater than a first preset number, all the target three-dimensional models are divided into multiple versions and sent to the same 3D printing device for printing; or, the cloud obtains the estimated printing time matching any user case, and when the estimated printing time is greater than the preset time, the unprinted target three-dimensional model corresponding to the user case is sent to other 3D printing devices for printing; or, the cloud obtains the working status of all 3D printing devices, and when there is a 3D printing device in an idle state, the unprinted target three-dimensional model in the 3D printing device with the largest number of tasks is sent to the idle 3D printing device for printing; or, the cloud obtains the number of models of the target three-dimensional model matching any user case, and when the number of models is less than a second preset number, the target three-dimensional model and the target three-dimensional models of other user cases are arranged in the same version and sent to the same 3D printing device for printing.

[0034] In some embodiments, the production strategy is configured as follows: the cloud determines a production priority corresponding to the target user case information, and allocates the classified multiple target three-dimensional models to the 3D printing device according to the order of production priority to produce the three-dimensional models; and / or the cloud adjusts the production priority corresponding to the target user case information in response to a priority setting operation triggered by the user, obtains an updated production priority, and produces the three-dimensional model based on the updated production priority.

[0035] In some embodiments, a 3D printing device includes: a first controller, used to receive multiple classified target three-dimensional models sent from the cloud, and user case information corresponding to the multiple target three-dimensional models; a printing mechanism, used to perform three-dimensional printing based on the multiple target three-dimensional models to form multiple 3D printed objects; a picking device, used to pick up the multiple 3D printed objects based on a preset picking strategy after each version of printing is completed; wherein the picking strategy includes setting the 3D printed objects belonging to the same user case in one or more storage items.

[0036] In some embodiments, the 3D printing device is further configured as follows: when there are 3D printed objects corresponding to more than two user cases in the same production sequence, the 3D printing device controls the motion parameters of the picking device of the 3D printing device according to the typesetting information, and after completing the picking of the 3D printed object of one user case, the 3D printed object of the next user case is picked up, so as to realize the picking of the 3D printed objects in the printing area in sequence.

[0037] In some embodiments, the picking device includes: a material receiving component, the material receiving component includes one or more storage components, and the storage components are used to store 3D printed objects; wherein the material receiving component stores 3D printed objects belonging to the same user case in one or more storage components.

[0038] In some embodiments, the material receiving assembly includes a conveying mechanism, which is used to drive the storage member to move to the material receiving position. When the storage member is located at the material receiving position, the 3D printed object enters the storage member from the mouth of the storage member.

[0039] In some embodiments, the system further comprises a material unloading component, which is configured to allow movement between a first position and a second position. In the first position, the material unloading component is used to receive the 3D printed object separated from the molding surface. In the second position, the material unloading component transfers the 3D printed object to a receiving body, and the driving mechanism can rotate the receiving body to move the 3D printed object out of the receiving body and into the receiving piece through the opening of the receiving piece; or

[0040] The material receiving body is configured to allow movement between a first position and a second position. The material receiving body is configured to receive a 3D printed object with excess printing material separated from the molding surface at the first position, and to allow the material receiving body to rotate from the first state to the second state at the second position; the driving mechanism can rotate the material receiving body so that the 3D printed object is moved out of the material receiving body and enters the storage member through the opening of the storage member.

[0041] According to a second aspect of the present disclosure, a method for three-dimensional printing is provided, characterized by comprising:

[0042] The material receiving mechanism is controlled to carry a 3D printed object with excess printing material; the material receiving mechanism is rotated from a first state to a second state so that the excess printing material drips from the 3D printed object, wherein the 3D printed object has at least two different inclination angles.

[0043] In some embodiments, the material receiving mechanism is maintained in the first state for a first period of time.

[0044] According to a third aspect of the present disclosure, a non-volatile storage medium is provided, wherein the non-volatile storage medium stores a plurality of instructions, wherein the instructions are suitable for being loaded by a processor and executing the above-mentioned method for three-dimensional printing.

[0045] Applying the technical solution of the present disclosure, the post-processing device includes a material receiving mechanism, including a material receiving body, the material receiving body is configured to carry a 3D printed object with excess printing material; a driving mechanism, the driving mechanism is configured to allow the material receiving mechanism to rotate from a first state to a second state, so that the excess printing material drips from the 3D printed object, wherein the 3D printed object has at least two different inclination angles. By adopting the above-mentioned method, by adjusting the dripping angle, the entire dripping process is not fixed at a single dripping position, so that the excess printing material on the 3D printed object can be better separated, and the efficiency of separating excess resin is improved. At the same time, through the method provided by the present disclosure, a better resin separation effect can be achieved, the solvent consumption and cleaning time during the later cleaning can be reduced, and the separated resin can also be recycled. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The drawings constituting a part of the present disclosure are used to provide a further understanding of the present disclosure. The exemplary embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0047] Figure 1 A flowchart of an optional method for three-dimensional printing provided by an embodiment of the present disclosure is shown;

[0048] Figure 2 A schematic diagram of an optional three-dimensional model type provided by an embodiment of the present disclosure is shown;

[0049] Figure 3 A schematic diagram of layout of an optional three-dimensional model provided in an embodiment of the present disclosure is shown;

[0050] Figure 4 A schematic diagram of an optional bounding box provided by an embodiment of the present disclosure is shown;

[0051] Figure 5 A schematic diagram of an optional connection structure provided by an embodiment of the present disclosure is shown;

[0052] Figure 6 Another optional layout diagram of a three-dimensional model provided by an embodiment of the present disclosure is shown;

[0053] Figure 7 A schematic diagram showing the structure of a locking device of a molding platform provided in an embodiment of the present disclosure is shown;

[0054] Figure 8 A schematic diagram showing the separation of the locking member and the platform fixing member provided in an embodiment of the present disclosure is shown;

[0055] Fig. 9 A front view of a locking device of a molding platform provided in an embodiment of the present disclosure is shown;

[0056] Fig.10 Shows Fig. 9 Sectional view at AA in the middle;

[0057] Fig.11 A schematic diagram of the structure of a locking member provided in an embodiment of the present disclosure is shown;

[0058] Fig.12 An exploded view of a moving block of a locking member provided in an embodiment of the present disclosure is shown;

[0059] Fig.13 A schematic diagram of the structure of a platform fixing member provided in an embodiment of the present disclosure is shown;

[0060] Fig.14 A schematic diagram showing the structure of a fixing plate of a locking member provided in an embodiment of the present disclosure is shown;

[0061] Fig.15 A cross-sectional view of a floating tray mechanism provided in Embodiment 1 of the present disclosure is shown;

[0062] Fig.16 Another cross-sectional view of the floating tray mechanism provided in the first embodiment of the present disclosure is shown;

[0063] Fig.17 An exploded view of a floating tray mechanism provided in the second embodiment of the present disclosure is shown;

[0064] Fig.18 A cross-sectional view of a floating tray mechanism provided in the second embodiment of the present disclosure is shown;

[0065] Fig.19 Another cross-sectional view of the floating tray mechanism provided in the second embodiment of the present disclosure is shown;

[0066] Fig. 20 A schematic structural diagram of a floating tray mechanism provided in an embodiment of the present disclosure is shown;

[0067] Fig.21 A simplified structural diagram of a 3D printing device provided in an embodiment of the present disclosure is shown;

[0068] Fig. 22 An exploded view of a liquid adding mechanism provided by an embodiment of the present disclosure is shown;

[0069] Fig.23 A schematic structural diagram of a liquid adding box of a liquid adding mechanism provided in an embodiment of the present disclosure is shown;

[0070] Fig.24 A cross-sectional view of a liquid adding box of a liquid adding mechanism provided in an embodiment of the present disclosure is shown;

[0071] Fig.25 A schematic diagram showing the structure of a temperature regulating assembly of a liquid adding mechanism provided by an embodiment of the present disclosure is shown;

[0072] Fig.26 A front view of a scraper mechanism provided by an embodiment of the present disclosure is shown;

[0073] Fig. 27 A schematic structural diagram of a scraper mechanism provided by an embodiment of the present disclosure is shown;

[0074] Fig.28 A schematic diagram showing a process in which a blade of a blade mechanism provided by an embodiment of the present disclosure moves from an initial position to a forward position;

[0075] Fig.29 A schematic diagram showing a process in which a blade of a blade mechanism provided by an embodiment of the present disclosure moves from a forward position to an initial position;

[0076] Fig.30 A schematic diagram of the three-dimensional structure of an embodiment of a 3D printer disclosed in the present invention is shown;

[0077] Fig.31 A three-dimensional structural schematic diagram of the shovel mechanism disclosed in the present invention is shown;

[0078] Fig.32 A bottom view schematically shows a shovel mechanism of the present disclosure;

[0079] Fig.33A schematic diagram of the three-dimensional structure of the fixed bracket of the shovel mechanism disclosed in the present invention is shown;

[0080] Fig.34 A schematic diagram of the three-dimensional structure of the shovel blade of the present invention when the shovel blade is in a separated state and in an initial state is shown;

[0081] Fig.35 A three-dimensional structural schematic diagram of the shovel mechanism of the present invention from another viewing angle is shown;

[0082] Fig.36 A partial cross-sectional view of a 3D printer in an embodiment of the present disclosure is shown;

[0083] Fig.37 An exploded view of a connecting mechanism in an embodiment of the present disclosure is shown;

[0084] Fig.38 Shows Fig.36 A magnified view of the middle part IV;

[0085] Fig.39 A cross-sectional view of a receiving member in an embodiment of the present disclosure is shown;

[0086] Fig.40 A cross-sectional view of a receiving member in another embodiment of the present disclosure is shown.

[0087] Fig.41 A flowchart of another optional method for three-dimensional printing provided by an embodiment of the present disclosure is shown;

[0088] Fig.42 A schematic structural diagram of an optional 3D printing device provided in an embodiment of the present disclosure is shown;

[0089] Fig.43 A schematic diagram of the three-dimensional structure of the material receiving assembly of the present disclosure is shown in which the receiving member is in a closed state;

[0090] Fig.44 A schematic diagram of the three-dimensional structure of the material receiving assembly of the present disclosure is shown in which the receiving piece is in an open state;

[0091] Fig.45 A schematic diagram of the three-dimensional structure of the object picking device disclosed in another perspective is shown;

[0092] Fig.46 Shows Fig.45 A partial enlarged view of the A part of the pickup device;

[0093] Fig.47 Shows Fig.45 A partial enlarged view of the B portion of the pickup device;

[0094] Fig.48A schematic diagram of the three-dimensional structure of the storage member disclosed in the present invention in a closed state is shown;

[0095] Fig.49 A schematic diagram of the three-dimensional structure of the storage member disclosed in the present invention in an open state is shown;

[0096] Fig.50 A three-dimensional structural schematic diagram of the skeleton structure of the storage member disclosed in the present invention is shown;

[0097] Fig.51 A schematic structural diagram of another embodiment of a device for taking out an item of a 3D printing device disclosed in the present invention is shown;

[0098] Fig.52 A schematic diagram of the three-dimensional structure of the object picking device disclosed in the present invention without installing a base frame is shown;

[0099] Fig.53 A schematic diagram of the three-dimensional structure of the guide cylinder and the rolling element disclosed in the present invention is shown;

[0100] Fig.54 A schematic diagram of the three-dimensional structure of the wire feeding assembly of the device for removing the object disclosed in the present invention is shown;

[0101] Fig.55 A schematic diagram of the three-dimensional structure of the buckle assembly of the device for taking out items disclosed in the present invention is shown;

[0102] Fig.56 A schematic diagram of the three-dimensional structure of the cutting assembly of the device for taking out items disclosed in the present invention is shown;

[0103] Fig.57 A schematic diagram of the three-dimensional structure of the storage box of the post-processing device disclosed in the present invention is shown;

[0104] Fig.58 A schematic diagram of the three-dimensional structure of the storage box disclosed in the present invention in an open state is shown;

[0105] Fig.59 A schematic diagram showing the structure of the sliding assembly of the pickup device disclosed in the present invention is shown;

[0106] Fig.60 A schematic structural diagram showing the lifting of the sliding assembly of the present disclosure is shown;

[0107] Fig.61 A schematic diagram of the structure of the tilting of the sliding assembly of the present disclosure is shown;

[0108] Fig.62 A schematic diagram showing the structure of a manipulator of another optional embodiment of a pickup device of a 3D printing device disclosed in the present invention;

[0109] Fig.63 A schematic diagram showing the structure of the support frame of the object picking device disclosed in the present invention is shown;

[0110] Fig.64 A schematic structural diagram of a storage rack of another optional embodiment of a retrieval device of a 3D printing device disclosed in the present invention is shown.

[0111] Fig.65 A schematic front view of a storage rack is shown;

[0112] Fig.66 A schematic diagram of the structure of a post-processing device provided in an embodiment of the present disclosure is shown;

[0113] Fig.67 A schematic diagram of the structure of a 3D printing device provided by an embodiment of the present disclosure is shown;

[0114] Fig.68 Another structural schematic diagram of a post-processing device provided by an embodiment of the present disclosure is shown;

[0115] Fig.69 A schematic structural diagram of a material receiving body of a post-processing device provided in an embodiment of the present disclosure is shown;

[0116] Fig.70 Another structural schematic diagram of the material receiving body of the post-processing device provided by the embodiment of the present disclosure is shown;

[0117] Fig.71 Another structural schematic diagram of the material receiving body of the post-processing device provided in the embodiment of the present disclosure is shown;

[0118] Fig.72 A schematic diagram showing another structure and another use state of the material receiving body of the post-processing device provided by an embodiment of the present disclosure is shown;

[0119] Fig.73 Another schematic diagram of the structure of the 3D printing device provided by the embodiment of the present disclosure is shown;

[0120] Fig.74 A front view of a post-processing device provided by an embodiment of the present disclosure is shown;

[0121] Fig.75 A right view of a material receiving mechanism and a 3D printed object provided by an embodiment of the present disclosure is shown;

[0122] Fig.76 A schematic diagram of the structure of a 3D printed object disclosed in the present invention is shown;

[0123] Fig.77 A schematic diagram showing the cleaning of excess resin by centrifugation in the prior art is shown;

[0124] Fig.78 Another front view of the post-processing device provided by the embodiment of the present disclosure is shown;

[0125] Fig.79A schematic structural diagram of a material receiving mechanism provided in an embodiment of the present disclosure is shown;

[0126] Fig.80 A front view of a post-processing device provided by an embodiment of the present disclosure is shown;

[0127] Fig.81 A schematic diagram of dynamic temperature distribution provided by an embodiment of the present disclosure is shown;

[0128] Fig.82 A front view of a post-processing device provided by an embodiment of the present disclosure is shown;

[0129] Fig.83 A front view of a post-processing device provided by an embodiment of the present disclosure is shown;

[0130] Fig.84 A front view of a post-processing device provided by an embodiment of the present disclosure is shown;

[0131] Fig.85 It is a schematic diagram of centrifugal force.

[0132] The above drawings include the following reference numerals:

[0133] 100. 3D printing equipment;

[0134] 11. Forming platform; 110. Locking member; 111. Fixing frame; 1111. Driving member; 1112. Rotating shaft; 1113. Handle; 1114. Rotating cam; 112. Fixing plate; 1121. First clamping portion; 1122. Clamping groove; 1123. Moving block; 1131. First limiting inclined surface; 1132. Base; 1133. Pressing block; 1134. First spring; 1135. First screw; 1136. Second spring; 1 137, first lifting block; 1138, second lifting block; 114, sliding guide structure; 1141, first guiding inclined plane; 1142, second guiding inclined plane; 115, guide block; 116, second screw; 117, third spring; 118, platform fixing member; 1181, second clamping part; 1182, wedge block; 1183, second limiting inclined plane; 1184, first locking block; 1185, second locking block; 119, position detection member;

[0135] 12, tray; 120, substrate; 121, guide column; 122, plate body; 123, pressing block; 124, connecting groove; 125, floating block; 1251, first avoidance groove; 1252, second avoidance groove; 1253, first rubber pad; 1254, second rubber pad; 1255, protrusion; 126, locking assembly; 1261, driving member; 1262, locking member; 1271, electromagnet; 1272, rotating shaft; 1273, cam; 1274, magnetic plate; 128, bearing seat; 1281, bearing; 1282, handle; 1283, elastic member;

[0136] 13. Separation device; 130. Mounting frame; 131. Blade guide rail; 132. Blade; 1321. Blade; 1322. Inclined surface; 1323. Blade seat; 133. Liquid contact part; 1331. Connecting flange; 1332. Positioning flange; 134. Cleaning part; 135. Second bracket; 136. Platform substrate; 137. First bracket; 1371. Top plate; 1372. Support beam; 1373. Movable bracket; 1381. Blade drive assembly; 1382. Transmission shaft; 1383. First transmission belt; 1384. First pulley; 1385. Second pulley; 1386. Second transmission belt; 1390. Fixed bracket; 1391. Connecting protrusion; 1392. Positioning protrusion; 1393. Positioning hole;

[0137] 14. Feeding assembly; 141. Receiving member; 142. Bottom plate; 1421. Liquid discharge portion; 1422. First slope; 1423. Second slope; 143. Carrying plate; 1431. Liquid through hole; 1433. First side plate; 1434. Second side plate; 144. Feeding assembly; 1441. Feeding member; 145. Liquid storage chamber; 146. Filter assembly; 1461. Filter screen; 1462. Clamping plate; 147. Avoidance hole;

[0138] 15. Liquid adding mechanism; 150. Liquid adding box; 151. Inner cavity; 152. Liquid inlet; 153. Liquid outlet; 154. Temperature regulating assembly; 1541. Temperature control board; 1542. Heat sink; 1543. Connecting pipe; 1544. Bracket; 1545. Temperature detection element; 155. Control board; 1551. Liquid level detection element; 1552. Capacitive liquid level gauge; 1553. Ultrasonic liquid level gauge; 156. Collecting tank; 1561. Base; 1562. Baffle; 157. Liquid inlet pump; 158. Liquid outlet pump;

[0139] 200, pick-up device; 20, material receiving assembly; 21, storage member; 211, frame; 2111, first frame body; 2112, second frame body; 2113, elastic member; 212, storage box; 2121, box body; 2122, cover; 2123, stopper; 22, conveying mechanism; 221, first conveying part; 222, second conveying part; 223, base frame; 224, guide cylinder; 225, rolling member; 2251, mounting frame; 2 252, roller; 2253, first rolling member; 2254, second rolling member; 226, sliding assembly; 2261, slide; 2262, connecting rod; 23, opening mechanism; 231, fixing mechanism; 2311, positioning frame; 2312, first telescopic member; 232, moving mechanism; 2321, moving member; 2322, second telescopic member; 2323, guiding structure; 2324, fixing frame; 2325, first driving member; 2326, first Transmission assembly; 23261, first transmission wheel; 23262, second transmission wheel; 23263, first chain belt; 23264, third transmission wheel; 23265, second chain belt; 24, sealing mechanism; 241, wire feeding assembly; 242, buckle assembly; 251, second transmission assembly; 2511, first gear; 2512, second gear; 2513, rotating wheel; 2514, third chain belt; 252, second driving member; 253, tightening assembly ; 2531, first tightening member; 2532, second tightening member; 26, support frame; 261, container; 27, storage rack; 28, cutting assembly; 281, base; 2811, first seat body; 2812, second seat body; 28121, strip hole; 282, first knife body; 283, second knife body; 284, third driving member; 285, elastic support member; 29, manipulator; 201, connecting rod-shaped connection structure; 202, grid-shaped connection structure;

[0140] 300, post-processing device; 3, material receiving mechanism; 31, material receiving body; 310, opening; 311, liquid outlet; 312, accommodating chamber; 313, side; 314, bottom; 32, cover plate; 321, stopper; 33, first liquid receiving container; 34, second transmission mechanism; 341, sector gear; 342, rack; 35, material receiving container; 36, second liquid receiving container; 37, liquid receiving track; 38, transfer receiving container; 391, toggle mechanism; 392, third transmission mechanism;

[0141] 4. Movable mechanism; 41. Driving mechanism; 411. First transmission mechanism; 412. Sliding assembly; 4121. Slide table; 4122. Connecting rod; 5. Temperature regulating mechanism; 51. Air outlet assembly; 52. Heat source; 53. Guide rail; 54. Temperature sensor; 6. Excess printing material; 7. Material recovery container; 8. 3D printed object; 81. Liquid accumulation area. DETAILED DESCRIPTION

[0142] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0143] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0144] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present disclosure. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0145] The present disclosure provides a system for three-dimensional printing. In one implementation step, after the 3D printing device completes printing, the post-processing device processes the excess printing material on the 3D printed object (for example, making the printing material drip for easy recycling), and then collects the material. Alternatively, in one implementation step, the cloud processes the three-dimensional model, and the cloud allocates the classified multiple target three-dimensional models to the 3D printing device according to a preset production strategy to produce the three-dimensional model. After the 3D printing device completes printing, the post-processing device processes the excess printing material on the 3D printed object, and then collects the material. Alternatively, in one implementation step, the cloud processes the three-dimensional model, and the cloud allocates the classified multiple target three-dimensional models to the 3D printing device according to a preset production strategy to produce the three-dimensional model. After the 3D printing device completes printing, the post-processing device first processes the excess printing material on the 3D printed object, and then the pickup device performs pickup processing on the multiple 3D printed objects.

[0146] The present disclosure provides a system for three-dimensional printing, including a cloud, wherein the cloud is configured to execute a method for three-dimensional printing. Figure 1 As shown, the method comprises the following steps:

[0147] Step S11, the cloud obtains multiple three-dimensional models to be printed and user case information corresponding to the multiple three-dimensional models;

[0148] It can be understood that the multiple 3D models to be printed are mixed with multiple cases and are not classified according to user case information. It is necessary to obtain the user case information corresponding to the multiple 3D models from the cloud for subsequent classification and typesetting.

[0149] In an optional embodiment, the cloud obtains multiple three-dimensional models to be printed, including: the cloud obtains multiple initial models to be printed (which may have different three-dimensional configurations and sizes); the cloud performs defect verification on the multiple initial models to obtain verification results corresponding to the multiple initial models; the cloud determines that the verification results corresponding to the multiple initial models indicate abnormal models with defects; and repairs the abnormal models to obtain multiple three-dimensional models.

[0150] It can be understood that multiple initial models can be regarded as multiple cases mixed together. In order to ensure that there are no model anomalies in the multiple initial models used in the cloud, and to ensure that there are no missing or lost parts, so as to match with the user case information later, the cloud performs defect verification on the multiple initial models and obtains the verification results corresponding to the multiple initial models. According to the verification results, the abnormal models are repaired to obtain multiple three-dimensional models.

[0151] Optionally, there may be multiple ways to process the verification. For example, the initial model is a three-dimensional model composed of triangular facets. It is expected that all triangular facets form a closed area and all normal vectors of the triangular facets face outward, and the model is considered to be closed. When it is detected that the initial model has defects such as holes or anti-triangular facets, the initial model is determined to be open. Anti-triangular facets are a collective defect in a three-dimensional model, which means that in a triangular facet, its normal vector points to the inside of the model. In a normal three-dimensional model, the normal vectors of all triangular facets should point to the outer surface of the model. When the normal vector of a triangular facet faces inward, that is, points to the inside of the model, it is called an anti-triangular facet. This defect may cause errors in model operations, such as rendering or physical simulation.

[0152] Optionally, the cloud will use different repair methods for different defects. When the verification result shows that there is a hole, the hole edge of the initial model with the hole is determined, and the edge is automatically repaired so that the model forms a closed area.

[0153] Optionally, when the cloud verifies that there is an inverse triangle patch, the normal vector of the inverse triangle patch is determined, and the normal vector is reversely processed so that the initial model forms a closed area. Finally, after automatic repair, the repaired multiple three-dimensional models can be used for the next step of operation.

[0154] Step S12, the cloud classifies the multiple three-dimensional models based on the user case information to obtain a target three-dimensional model matching each user case;

[0155] In an optional embodiment, the cloud classifies multiple three-dimensional models based on user case information to obtain a target three-dimensional model that matches each user case, including: the cloud determines case identifiers corresponding to the multiple three-dimensional models according to the user case information; uses the case identifier indicated by each user case information as the target case identifier; and determines a target three-dimensional model that matches the target case identifier among the case identifiers corresponding to the multiple three-dimensional models to obtain a target three-dimensional model that matches each user case.

[0156] It can be understood that after the cloud selects a user case, the user case information is used as the target case information. The target case information is used as the basis for model screening, and the model that matches the target case information is determined in the user case information corresponding to the above-mentioned multiple three-dimensional models as the target three-dimensional model. In other words, the target three-dimensional model with consistent target case information can use the model of the same case or user. Through the above processing, the cloud screens the target three-dimensional model of the target case information from multiple three-dimensional models mixed with multiple cases. Repeat the above steps of selecting the target case until all models are classified, and obtain the target three-dimensional model that matches each user case.

[0157] In one embodiment, the case identifications corresponding to the multiple 3D models include the correspondence between each 3D model and a specific user case identification. The target 3D model is selected from the multiple 3D models by finding the user case identification of the target 3D model, ie, the target case identification.

[0158] Optionally, the user case information corresponding to the above-mentioned multiple three-dimensional models can be stored in a predetermined database, and the process of matching the target case identification involves comparison and matching processes, such as database query, condition screening, comparison, matching and other operations.

[0159] Optionally, each user case information imported for processing has a corresponding naming rule, generally: XXX_XXX_XXX. During the preliminary classification, if they are located in the same folder, the same user case is determined based on each identical file naming prefix. For example, user A uploaded models (such as orthodontic dental molds) A1-A10 continuously in the time period t1, and user B uploaded models (abutment models) B1-B10 continuously in the time period t2. At this time, it can be named "User A_Orthodontic Dental Model_t1", "User B_Abutment Model_t2". At this time, the user case information includes user A, orthodontic dental mold, upload time t1, user B, abutment model, t2, and the case includes orthodontic dental mold and abutment model. The cloud can first select user A as the target case information and classify multiple three-dimensional models.

[0160] In an optional embodiment, multiple three-dimensional models are classified based on user case information to obtain a target three-dimensional model matching each user case, including: the cloud determines the model upload time corresponding to the multiple three-dimensional models according to the user case information; and determines the three-dimensional models uploaded in the same time interval as the target three-dimensional models of the same user case.

[0161] In one embodiment, each user case information that is imported has a corresponding model upload time, and the cloud classifies each model based on the import time. For example, when importing, the model of user case A is imported in the same time period. After the import is completed, the user clicks the completion option. At this time, the 3D model data uploaded in this time interval is determined as the target 3D model of user case A, and then user case B, user case C, etc. are uploaded in the above manner, so as to obtain a target 3D model matching each user case.

[0162] In step S13, the cloud allocates the classified multiple target three-dimensional models to 3D printing equipment and / or post-processing equipment according to a preset production strategy to produce the three-dimensional models; wherein the production strategy includes setting the target three-dimensional models belonging to the same user case in the same production sequence.

[0163] It should be noted that the number of 3D printing devices can be one or more, and the present disclosure does not limit the number of 3D printing devices. The cloud includes one of a cloud server, a local server, a central processing unit or a local area network server. The term "cloud" in the present disclosure includes a cloud, a central local area network controller, an external processor or a local networking device, that is, a data storage and processing device other than a 3D printing device. The above production method can be implemented in the cloud, such as a cloud platform, a cloud server, etc. After obtaining multiple classified target three-dimensional models, the cloud allocates and issues tasks according to a preset production strategy, and each production setting performs three-dimensional printing according to the received tasks. Among them, relative to the printing operation, the production strategy is pre-configured, and the purpose is to set the target three-dimensional models belonging to the same user case in the same production sequence to achieve centralized production, so as to improve the efficiency of subsequent sorting work.

[0164] It should be noted that the production sequence includes the task execution queue of the 3D printing device, and the production sequence may include one or more printing versions, and one production sequence may correspond to multiple 3D printing devices. For example, the printing format of the 3D printing device is limited, and the number of models that can be printed in one version is also limited. Therefore, when the number of target three-dimensional models corresponding to a user case can be printed in one version, it is preferred to print them in the same version; when the number of target three-dimensional models corresponding to the user case is large and needs to be printed in multiple versions, multiple versions can be arranged in the same production sequence (for example, user A has 100 three-dimensional models to be printed, 50 are assigned to the first 3D printing device, and the other 50 are assigned to the second 3D printing device. The printing of these 100 three-dimensional models is a production sequence) or multiple versions are sent to the same 3D printing device for printing, which is conducive to subsequent sorting work.

[0165] In an optional embodiment, after obtaining the target three-dimensional model matching each user case, the method further includes: the cloud performs layout processing on the target three-dimensional model belonging to each user case respectively to obtain a target layout result matching each user case; the cloud distributes the target layout result to a 3D printing device for three-dimensional printing.

[0166] It can be understood that the target 3D model belongs to a user case information, and the layout processing performed on it by the cloud can be regarded as the centralized layout processing of the model of the same case, and the target layout result matching each user case is obtained. The target layout result obtained by the above processing can make the target 3D model included in each user case information have better 3D printing efficiency and reduce the sorting workload.

[0167] In an optional embodiment, the cloud performs typeset processing on the target three-dimensional models belonging to each user case respectively to obtain a target typeset result matching each user case, including: the cloud classifies the target three-dimensional models belonging to each user case respectively to obtain a three-dimensional model type corresponding to the target three-dimensional model; the cloud performs typeset processing on multiple target three-dimensional models based on the three-dimensional model types respectively corresponding to the multiple target three-dimensional models to obtain a target typeset result matching each user case.

[0168] It can be understood that the cloud classifies the target three-dimensional models belonging to each user case separately to obtain the three-dimensional model type corresponding to the target three-dimensional model. For example, when a user case information is determined as the target user case information, and the same user case is matched to multiple target three-dimensional models, centralized typesetting processing is performed based on the three-dimensional model types corresponding to the multiple target three-dimensional models to obtain the target typesetting result matched by the user case. Repeat the above process until the typesetting of all user cases is completed, and the target three-dimensional models of the same user case information can be centrally typeset. The target typesetting result obtained in the above manner can improve the efficiency of three-dimensional printing. The cloud can print multiple target three-dimensional models together according to the three-dimensional model types corresponding to the multiple target three-dimensional models, and can also reduce errors caused by sorting.

[0169] Optionally, the types of 3D models formed by photocuring are divided into major categories: dental types, rehabilitation braces, headphones, toy figures, mechanical parts, etc. The corresponding major categories can be further subdivided into: dental types are divided into abutment teeth, full jaws, prototypes, orthodontic dental models, jaw pads, etc.; headphones are divided into headphone shells, etc. Since the dental application scenario is particularly dependent on the classification of the same case model, the present disclosure preferably uses dental applications as examples, but is not limited to dental application scenarios.

[0170] Taking dental applications as an example, multiple target 3D models are matched in the same user case, and the multiple target 3D models correspond to their own 3D model types, that is, there will be multiple types of models in the same case. Specifically in dental applications, the 3D model type can include at least abutment models and oral models. It can be understood that the oral model has gum modeling, in which the position modeling of implant holes can be set, and the abutment model is used to represent the implant modeling of a single tooth. The two match to form the entire 3D modeling of the user case.

[0171] It should be noted that in the example of dental applications, the prototype model is a model used to simulate the patient's oral condition. It is usually made of artificial materials or 3D printing technology and can be used for diagnosis, treatment planning, teaching, and the production of braces and dental implants. Through the dental prototype model, we can better understand the patient's oral structure and problems, and have the function of auxiliary treatment. The abutment model is a tooth model copied according to the shape of the patient's oral abutment teeth in dentistry for the production of restorations such as dental implants. Oral models include full jaw models and half jaw models. The full jaw model refers to a model made according to the shape of the patient's entire mandible or maxilla, which can be used to simulate the structure and shape of the entire maxillofacial face. The half jaw model refers to a model made according to the shape of the patient's half mandible and maxilla, which can be used to simulate the structure and shape of the half maxillofacial face. According to needs, a half-mouth or a quarter-mouth oral model can also be generated.

[0172] Optionally, the above-mentioned oral model may include a full jaw model and a half jaw model (also referred to as a prototype model), the full jaw model includes digital models of both sides of the oral cavity, and the half jaw model includes a digital model of one side of the oral cavity (or half of one side, one quarter of one side).

[0173] Figure 2 is a schematic diagram of an optional three-dimensional model type provided according to an embodiment of the present disclosure, Figure 2 It includes multiple subgraphs, namely Figure 2 a, Figure 2 b, Figure 2 c. Figure 2 a shows the abutment model, the upper part of the abutment model is the crown, and the lower part is the part inserted into the implant hole; Figure 2 b shows the oral model, which is a half-mouth (half-jaw) model. There is an implant hole in the middle of the teeth on one side for installing dental implants. Figure 2 c illustrates another oral model, which represents a full jaw model, which is an overall modeling of the upper or lower gums, including two implant holes for installing dental implants.

[0174] It should be noted that the above examples of target three-dimensional models and three-dimensional model types are only for illustration and are not limited to dental applications.

[0175] In an optional embodiment, the cloud classifies the target three-dimensional models belonging to each user case to obtain the three-dimensional model type corresponding to the target three-dimensional model, including: the cloud determines the three-dimensional model type corresponding to a target three-dimensional model among multiple target three-dimensional models by at least any one of the following methods: determining the model volume of the target three-dimensional model; determining the three-dimensional model type corresponding to the target three-dimensional model based on a preset volume threshold and the model volume; or determining the model morphology of the target three-dimensional model; determining the three-dimensional model type corresponding to the target three-dimensional model based on the model morphology; or determining the maximum plane area of ​​the target three-dimensional model, and determining the three-dimensional model type corresponding to the target three-dimensional model based on a preset area threshold and the maximum plane area; or projecting the target three-dimensional model along a preset direction to obtain the projection features of the target three-dimensional model; obtaining the three-dimensional model type corresponding to the target three-dimensional model based on the projection features; obtaining the three-dimensional model types corresponding to multiple target three-dimensional models respectively by determining the three-dimensional model type corresponding to the target three-dimensional model.

[0176] It is understandable that since there are multiple types of 3D models in multiple target 3D models, they need to be classified and processed according to the 3D model types. The cloud can use multiple methods to determine the corresponding 3D model type for a target 3D model, and the method selection range includes at least one of the following methods:

[0177] One way is to determine the model volume of the target three-dimensional model, and determine the three-dimensional model type corresponding to the target three-dimensional model based on a preset volume threshold and the model volume.

[0178] One way is to determine the model form of the target three-dimensional model; based on the model form, determine the three-dimensional model type corresponding to the target three-dimensional model.

[0179] One way is to determine the maximum plane area of ​​the target three-dimensional model, and determine the three-dimensional model type corresponding to the target three-dimensional model based on a preset area threshold and the maximum plane area.

[0180] Another method is to project the target three-dimensional model along a preset direction to obtain the projection features of the target three-dimensional model, and based on the projection features, obtain the three-dimensional model type corresponding to the target three-dimensional model.

[0181] It should be noted that the type is determined by using one or a combination of the above multiple methods to improve the accuracy of the three-dimensional model type classification. Through the above processing, multiple target three-dimensional models can be automatically identified and classified.

[0182] Optionally, taking dental applications as an example, the above-mentioned three-dimensional model type of determining the target three-dimensional model by using the model volume is specifically described, assuming that the oral model can include a full jaw model and a half jaw model. The way to determine the model volume is that the volume calculation shown is the normal formula V=L*W*H (length, width and height), where V represents the model volume, L represents the length of the model, W represents the width of the model, and H represents the height of the model. By setting the volume threshold, it can be judged that the volume greater than the threshold is an oral model, and the volume less than the threshold is an abutment model, and so on, and the classification is carried out in the same way, thereby obtaining the target three-dimensional model of different three-dimensional model types matched in the same user case. For this application scenario, since the volume difference between a single tooth and a model with a gum is relatively obvious, the abutment model can be determined by using the model volume threshold, and the oral threshold greater than the volume threshold can be divided into a full jaw model and a half jaw model.

[0183] Optionally, taking dental applications as an example, for the maximum plane area of ​​the target three-dimensional model, the maximum plane area of ​​the abutment model is the smallest, the maximum plane area of ​​the half-jaw model is medium, and the maximum plane area of ​​the full-jaw model is the largest among the three. An area threshold can be set to distinguish and classify different three-dimensional model types.

[0184] Optionally, taking dental applications as an example, for the projection shape of the target three-dimensional model, the shape of the abutment model is cylindrical, the shape of the die model is arc-shaped (C-shaped), and the shape of the full jaw model is D-shaped. The target three-dimensional model is projected along a set direction (for example, the z-axis direction, that is, the axial direction from the root to the crown). The target three-dimensional model is classified according to the shape or size of the projection. In order to further distinguish between the half-jaw model and the full-jaw model, it is necessary to project the target three-dimensional model to obtain a projection image, and calculate the bounding box of the target three-dimensional model to distinguish it from the actual proportion of the projection image.

[0185] It should be noted that, since the difference between the abutment tooth model and the full jaw model / half jaw model is large, it is preferred to use at least one of the above-mentioned model volume, plane area, and projection shape to determine. The difference between the full jaw model and the half jaw model is smaller than that of the abutment tooth model, and the abutment tooth model can be first screened out by the model volume, and then further classified by at least one of the plane area and projection shape.

[0186] For other 3D model applications, such as rehabilitation braces, headphones, toy figures, mechanical parts and accessories, for example, figure figures, the arms, trunks, heads, etc. of human models also have differences in volume, shape, maximum plane area, and projection characteristics. The same method as the above-mentioned dental applications can be used to distinguish them using the model volume, shape, maximum plane area, and projection characteristics. I will not go into details here.

[0187] In an optional embodiment, the cloud performs typeset processing on multiple target three-dimensional models based on the three-dimensional model types respectively corresponding to the multiple target three-dimensional models to obtain target typeset results matching each user case, including: the cloud performs typeset processing on multiple target three-dimensional models according to typeset parameters to obtain target typeset results matching each user case, wherein the typeset parameters include at least one of the following: a preset model spacing parameter, a platform spacing parameter, and an angle adjustment number of times, the platform spacing parameter being the spacing between the multiple target three-dimensional models and the forming platform respectively, and the angle adjustment number being the number of times the placement angle is allowed to be adjusted during the typesetting process of the corresponding target three-dimensional model.

[0188] It can be understood that the cloud can perform typeset processing on multiple target three-dimensional models according to predetermined typeset parameters to achieve centralized printing layout of models matched to the same user case. The typeset parameters include at least one of the following: preset model spacing parameters, platform spacing parameters, and angle adjustment times. The model spacing parameter is used to control the distance between models to ensure that they are not too crowded or scattered during typeset. The platform spacing parameter is the spacing between multiple target three-dimensional models and the forming platform, which helps to ensure that the model can be correctly aligned with the plane of the forming platform during the forming process. The number of angle adjustments is the number of times the placement angle of the target three-dimensional model is allowed to be adjusted during the typesetting process to prevent falling into a cycle of repeated rearrangement to ensure the efficiency of typesetting. Through the adjustment and optimization of the above-mentioned typesetting parameters, the cloud can obtain the target typesetting results that match the user case to meet different typesetting requirements and conditions. It helps to improve the typesetting efficiency and accuracy of the same case and provide support for subsequent forming or processing processes.

[0189] In an optional embodiment, the cloud performs typeset processing on multiple target three-dimensional models based on the three-dimensional model types respectively corresponding to the multiple target three-dimensional models to obtain a target typeset result matching each user case, including: the cloud determines that the three-dimensional model type is a first three-dimensional model among the multiple target three-dimensional models, and determines that the three-dimensional model type is a second three-dimensional model; when there are multiple first three-dimensional models, the cloud uses a predetermined first distance interval to perform typeset processing on the multiple first three-dimensional models to obtain a first typeset result, wherein the first distance interval belongs to a model spacing parameter; the cloud uses a predetermined second distance interval to perform typeset processing on the first typeset result and the second three-dimensional model to obtain a target typeset result, wherein the second distance interval belongs to a model spacing parameter.

[0190] It can be understood that when the cloud processes the layout of multiple target three-dimensional models, it can be based on their corresponding three-dimensional model types. First, it can be divided into a first three-dimensional model and a second three-dimensional model according to the three-dimensional model type. The above classification is only an example and may not be limited to two categories. For multiple first three-dimensional models, the cloud can use a predetermined first spacing as an example to perform layout processing to obtain a first layout result. Based on the first layout result, the second three-dimensional model is layout processed again. In this process, the cloud uses a predetermined second distance interval to keep the spacing between the first layout result and the second three-dimensional model appropriate, thereby obtaining a typeset target layout result. In the above manner, the characteristics and needs of different types of models are taken into account. The cloud achieves a more optimized layout effect by adjusting the spacing and layout method, ensuring the accuracy and rationality of the layout, and meeting the needs of different types of models.

[0191] Optionally, taking dental applications as an example, the layout processing of multiple target three-dimensional models is illustrated. Figure 3 is a schematic diagram of layout of an optional three-dimensional model provided according to an embodiment of the present disclosure, Figure 3 It includes multiple subgraphs, namely Figure 3 a, Figure 3 b, Figure 3 c. If Figure 3 a illustrates a layout of a three-dimensional model, which matches 5 abutment tooth models to the target user case in each user case, and regards the abutment tooth model as a model type, that is, the first three-dimensional model mentioned above, and sets the models between the 5 abutment tooth models according to the first distance interval, as well as the distance interval between the abutment tooth model and the forming platform, and uses the arranged 5 abutment tooth models as the first layout result.

[0192] Figure 3 b shows the target layout result, and the first layout result and the oral model (such as the half-jaw model) are centrally layouted, and layout is also performed according to the set second distance interval to obtain the target layout result.

[0193] Optionally, the first layout result is typeset with the second three-dimensional model, and the cloud can use enumeration to obtain multiple candidate layout results, and the layout areas corresponding to the multiple candidate layout results are different. Among the multiple candidate layout results, the one with the smallest layout area is determined as the target layout result. The number of times a model is adjusted is adjusted by enumeration (not exceeding the number of adjustment angles set by the layout parameters). Preferably, under the parameter restrictions of 0.1mm (millimeter) between the model spacing and 0.1mm between the platform spacing, the model is continuously adjusted to arrange the target three-dimensional model with maximum efficiency.

[0194] Optionally, for the target three-dimensional model, a target layout result of the same case is generated, and when there are multiple predetermined user cases, target layout results are generated for the multiple predetermined user cases respectively. According to the platform size of different 3D printing devices, the target layout results generated for the multiple predetermined user cases can be centrally laid out on the molding platform of the 3D printing device. Figure 3 c illustrates the multi-case layout method of 3D printing, indicating that the target layout results of two cases are laid out on the forming platform for centralized printing and layout processing.

[0195] In an optional embodiment, after typeset processing is performed on multiple target three-dimensional models, the method further includes: when there are multiple target three-dimensional models belonging to the same user case, the cloud adds a predetermined connection structure between the multiple target three-dimensional models belonging to the same user case to form a connection relationship between the multiple target three-dimensional models of the same user case.

[0196] It can be understood that, in the case where there are multiple target 3D models belonging to the same user case, in order to form a connection relationship between the multiple target 3D models of the same user case, it is considered to add a predetermined connection structure between the multiple target 3D models belonging to the same user case obtained by matching. In the above manner, the cloud can connect multiple target 3D models together to facilitate subsequent sorting after printing, and it can be clear which target 3D models belong to the same user case.

[0197] Optionally, the predetermined connection structure may be a rigid connection or a flexible connection.

[0198] In an optional embodiment, the method further includes: the cloud generates a predetermined connection structure based on the shortest distance path, the shortest distance path being a line connecting two points with the shortest distance among all points between the two target three-dimensional models; and / or, the cloud identifies characteristic holes in the target three-dimensional model, and generates a predetermined connection structure based on a strategy for avoiding characteristic holes.

[0199] It can be understood that when the cloud generates a predetermined connection structure, it can generate the connection structure based on the shortest distance path, and the shortest distance path refers to the line connecting the two points with the shortest distance among all the points between the two target three-dimensional models mentioned above. By generating a connection structure based on the shortest distance path, the effectiveness of the connection structure can be ensured and unnecessary connection costs can be reduced. In addition, it is also possible to identify characteristic holes in the target three-dimensional model, and generate a predetermined connection structure based on a strategy to avoid characteristic holes. Characteristic holes refer to holes or hollow parts with specific shapes and sizes in the target three-dimensional model. By avoiding characteristic holes, conflicts or interferences with these characteristic holes in the connection structure can be avoided to ensure the feasibility and correctness of the connection structure. The above two optional methods of generating connection structures are conducive to the accuracy and reliability of generating predetermined connection structures in the cloud, providing better support and guarantee for subsequent manufacturing and processing processes.

[0200] Optionally, the above two target three-dimensional models are an example, and the number can be set to a predetermined number. For a predetermined number of target three-dimensional models to which a predetermined connection structure is to be added among multiple target three-dimensional models, the shortest distance path between the predetermined number of target three-dimensional models is determined; based on the shortest distance path between the predetermined number of target three-dimensional models, a predetermined connection structure is added to the predetermined number of target three-dimensional models; and adding a predetermined connection structure between multiple target three-dimensional models is performed by using a method of predetermining the connection structure for a predetermined number of target three-dimensional models.

[0201] It can be understood that for a predetermined number of target three-dimensional models to be added with a predetermined connection structure among multiple target three-dimensional models, the shortest distance path between these models is first determined. After adding the predetermined connection structure, the predetermined number of target three-dimensional models can be connected together to form a complete structure or case distribution.

[0202] Optionally, characteristic holes respectively included in multiple target three-dimensional models are identified to obtain characteristic hole distribution information; based on the characteristic hole distribution information, an avoidance connection strategy (i.e., a strategy for avoiding characteristic holes) is generated, wherein the avoidance connection strategy includes: prohibiting the addition of predetermined connection structures at the positions of characteristic holes respectively included in the multiple target three-dimensional models; using the avoidance connection strategy to add predetermined connection structures between the multiple target three-dimensional models.

[0203] It can be understood that the avoidance connection strategy may include prohibiting the positions of characteristic holes respectively included in multiple target three-dimensional models, and adding a predetermined connection structure to avoid interference or conflict with these characteristic holes in the connection mechanism.

[0204] In an optional embodiment, a predetermined connection structure is added between multiple target three-dimensional models belonging to the same user case, including: the cloud generates a bounding box for the first target three-dimensional model of the two target three-dimensional models; determines the geometric center point in the bounding box, and determines the connection point that is closest to the geometric center point and the second target three-dimensional model of the two target three-dimensional models; uses the line between the geometric center point and the connection point as the shortest distance path between the two target three-dimensional models; and / or, when the predetermined connection structure intersects with the feature hole, the cloud reduces the predetermined connection structure until the predetermined connection structure does not intersect with the feature hole.

[0205] It can be understood that the cloud generates a bounding box for the first target 3D model of the two target 3D models. The bounding box is a geometric shape used to approximate the target 3D model. The geometric center point in the bounding box is determined, which may be the center point of the bounding box. The connection point with the closest distance between the geometric center point and the second target 3D model is determined by calculating the shortest distance from the center point of the set to the surface of the second target 3D model. The line between the center point and the connection point is used as the shortest distance path between the two target 3D models. This path is used to generate a connection structure to connect the two target 3D models together.

[0206] Optionally, a predetermined number (such as two) of target three-dimensional models are divided to obtain a first target three-dimensional model and a second target three-dimensional model; a bounding box is generated for the first target three-dimensional model; a geometric center point in the bounding box is determined, and a connection point with the shortest distance between the geometric center point and the second target three-dimensional model is determined; and a line between the geometric center point and the connection point is used as the shortest distance path between the predetermined number of target three-dimensional models.

[0207] Optionally, the first target three-dimensional model is an abutment model. In view of the particularity of centralized layout of abutment models, bounding boxes are generated for multiple abutment models. Figure 4 is a schematic diagram of a bounding box of an optional method for three-dimensional printing provided according to an embodiment of the present disclosure, such as Figure 4 The bounding box shown is a solid rectangle that encloses the first target three-dimensional model and finds the center point of this solid model. XYZ is a schematic diagram of the spatial coordinate system. The eight corner points of the packaging box are schematically illustrated with coordinates. The geometric center point can be schematically illustrated as (x1+x2) / 2, (y1+y2) / 2, (z1+z2) / 2. Since it is necessary to generate a connection between the first layout result and the second target three-dimensional model on the bottom surface, it is only necessary to determine the center point on the XY plane based on (x1+x2) / 2 and (y1+y2) / 2 as the geometric center point.

[0208] Optionally, the cloud generates connection structure prediction information based on multiple target three-dimensional models; when the connection structure prediction information and the characteristic hole distribution information indicate that there is an intersection between the predetermined connection structure and the characteristic hole, it is determined that there is an abnormal connection structure where the predetermined connection structure intersects with the characteristic hole; the abnormal connection structure is reduced and adjusted until the connection structure prediction information and the characteristic hole distribution information indicate that there is no intersection between the predetermined connection structure and the characteristic hole, and the predetermined connection structure is added between the multiple target three-dimensional models.

[0209] Optionally, taking dental applications as an example, since both the full jaw model and the half jaw model have implant holes, the above-mentioned implant holes are used as characteristic holes, and the predetermined connection structure cannot penetrate into the hole and needs to be avoided. Once the predetermined connection structure touches the hole, it needs to be automatically reduced until it can no longer penetrate. The size of the predetermined connection structure can be adjusted, that is, the width and thickness can be set. The specific parameter values ​​need to be comprehensive of the printing material and process level, preferably set to 2mm (millimeter) in height and 5mm in width.

[0210] Figure 5 is a schematic diagram of a connection structure of an optional method for three-dimensional printing provided according to an embodiment of the present disclosure, Figure 5 There are multiple subgraphs in Figure 5 a, Figure 5 b. If Figure 5 As shown in a, the target typesetting result is shown from the bottom surface direction, wherein the predetermined connection structure on the bottom surface is marked as 201, and 201 is a connecting rod-shaped connection structure; Figure 5 As shown in FIG. 2 b , the predetermined connection structure on the bottom surface is a grid-like connection structure 202 .

[0211] In an optional embodiment, the method further includes: performing preprocessing operations on the target three-dimensional model in the cloud to obtain a preprocessed target three-dimensional model, wherein the preprocessing operations include one or more of slicing, straightening, hollowing out, adding support structures, marking, filling undercuts, and identifying gum lines.

[0212] It can be understood that the target three-dimensional model in the optional embodiment is digital data, which is stored in the cloud, and the pre-processing operation for 3D printing is performed in the cloud. Through the pre-processing operation, sliced ​​data is generated according to the target three-dimensional model, and the sliced ​​data (for example, stl format, Stereo Lithography, a common 3D model file format) is sent to the 3D printing device for printing.

[0213] It is understandable that in order to save materials and ensure that the target three-dimensional model does not deform, multiple target three-dimensional models are preprocessed respectively, and the preprocessed multiple target three-dimensional models are subjected to typesetting processing to generate the target typesetting result. The above preprocessing method can be hollowing processing and / or adding a support structure.

[0214] Optionally, after the target three-dimensional model is placed, the target three-dimensional model required is hollowed out according to the three-dimensional model type of the target three-dimensional model. Hollowing out the three-dimensional model means that the bottom surface of the model with a solid bottom surface is hollowed out. The hollowing algorithm is based on the set hollow wall thickness and precision value (preset value). After the same model is shrunk and overlapped, the bottom surface is emptied to form the hollowed-out target three-dimensional model. Since the target three-dimensional model is processed as a hollow, a base plate needs to be added to the hollow area. In order to prevent the three-dimensional model from deforming and shrinking, the printed three-dimensional model needs to add a base plate to overcome deformation. Because factors such as leakage, material saving, and process processing need to be considered, a base plate needs to be added to the printed three-dimensional model, and it is preferably made into a honeycomb shape.

[0215] Optionally, taking dental applications as an example, if the target three-dimensional model is a base tooth model and a half-jaw model, Figure 5 b shows a schematic diagram of the base plate, through which the abutment model and the half-jaw model are connected.

[0216] Optionally, supports are added to the target 3D model. The cloud determines whether support structures need to be added based on the identified 3D model type. Support processing is performed for suspended models (which can be set in the typesetting stage). Structures such as columns are added to allow the suspended model to be supported during printing, or supports are added to the target 3D model after hollowing out to ensure that the internal hollowed-out model does not fall off during printing.

[0217] Optionally, the support structure may be added in at least one of the following ways: corresponding to the target three-dimensional model to be supported, its lowest point may be found, that is, the lowest point has support.

[0218] Taking dental applications as an example, according to the special requirements of dental applications, such as the upper surface of the abutment and the die hole, no support is required to achieve automatic avoidance of the area that does not require support, such as the surface of the target 3D model is not supported, and the holes in the design of the target 3D model are not supported, and the holes are wearing or working areas. It should be noted that since the added support structure needs to be removed in the end, the support strategy can be set in the support contact point area to ensure that the support is easy to disassemble when the model is printed without falling off.

[0219] Optionally, the target three-dimensional model is marked. A mark is generated on the digital three-dimensional model according to a preset mark or a mark input by the user, which is beneficial for subsequent sorting.

[0220] Optionally, the target three-dimensional model is filled with undercuts, which is used to produce dental orthodontic products. According to the identified undercut areas on the digital three-dimensional model, the digital three-dimensional model is filled with undercuts to avoid the dental model produced later being unable to produce orthodontic braces.

[0221] Optionally, the gum line of the target three-dimensional model is identified, and this step is used to produce dental orthodontic products. According to the gum line on the identified digital three-dimensional model, the identified gum line is sent to a cutting device. The printed three-dimensional model is laminated, and the film is cut according to the gum line to obtain an orthodontic brace.

[0222] In the present disclosure, multiple three-dimensional models to be printed and user case information corresponding to the multiple three-dimensional models are obtained through the cloud; the cloud classifies the multiple three-dimensional models based on the user case information to obtain the target three-dimensional model matching each user case; the cloud allocates the classified multiple target three-dimensional models to the 3D printing device and / or the post-processing device according to the preset production strategy to produce the three-dimensional model; wherein the production strategy includes setting the target three-dimensional models belonging to the same user case in the same production sequence, and / or sending the target three-dimensional models belonging to the same user case to the same 3D printing device for printing. By printing the target three-dimensional models belonging to the same user case in the same production sequence or in the same 3D printing device, the purpose of centralized production of the three-dimensional models of the same user case is achieved, the efficiency of sorting after printing is improved, the efficiency of scheduling the production of the three-dimensional model is greatly improved, and the processing time is reduced; the technical effect of improving the printing efficiency of the three-dimensional model is achieved, thereby solving the technical problem in the related technology that the sorting during 3D printing production is time-consuming and labor-intensive, resulting in low 3D printing production efficiency.

[0223] In an optional embodiment, the production sequence includes one or more printing versions, and the production strategy is further configured as: the cloud sets the target three-dimensional model belonging to the same user case in the same printing version for printing; or the cloud sets the target three-dimensional model belonging to the same user case in multiple printing versions, and sends the multiple printing versions to the same 3D printing device for printing; or the cloud sets the target three-dimensional model belonging to the same user case in multiple printing versions, and sends the multiple printing versions to different 3D printing devices for printing.

[0224] It should be noted that when the target three-dimensional model of the same user case can be printed in the same printing version, the target three-dimensional model belonging to the same user case can be set to be printed in the same printing version. After the printing of this version is completed, the three-dimensional model of this user case can be picked up, such as cutting, collecting and packaging. When the target three-dimensional model of the same user case cannot be printed in the same printing version, the target three-dimensional model belonging to the same user case can be set to be printed in multiple printing versions, and these versions can be sent to the same 3D printing device for printing. After each version is printed or all the models of the user case are printed, the three-dimensional model of this user case can be picked up, such as cutting, collecting and packaging. Printing on the same 3D printing device can also save subsequent sorting steps and improve production efficiency.

[0225] In other embodiments, in order to improve printing efficiency or utilization of 3D printing equipment, the target three-dimensional model belonging to the same user case can also be set in multiple printing versions, and the multiple printing versions can be sent to different 3D printing devices for printing. For example, when there are many printing versions of the same user case, in order to improve printing efficiency and save printing time, the multiple versions are sent to multiple 3D printing devices for printing. At this time, each printing version contains the target three-dimensional model belonging to the same user case, and after each printing version is printed, the three-dimensional model of this user case can be picked up, such as cutting, collecting and packaging.

[0226] In an optional embodiment, the production sequence includes one or more printing versions, and the production strategy is further configured as follows: the cloud obtains the model quantity of the target three-dimensional model matching any user case, and when the model quantity is greater than a first preset number, all the target three-dimensional models are divided into multiple versions and sent to the same 3D printing device for printing; or the cloud obtains the estimated printing time matching any user case, and when the estimated printing time is greater than the preset time, the unprinted target three-dimensional model corresponding to the user case is sent to other 3D printing devices for printing; or the cloud obtains the working status of all 3D printing devices, and when there is a 3D printing device in an idle state, the unprinted target three-dimensional model in the 3D printing device with the largest number of tasks is sent to the idle 3D printing device for printing; or the cloud obtains the model quantity of the target three-dimensional model matching any user case, and when the model quantity is less than a second preset number, the target three-dimensional model and the target three-dimensional models of other user cases are typeset in the same version and sent to the same 3D printing device for printing.

[0227] It should be noted that the cloud can allocate 3D printing equipment according to the number of models in the user case. Figure 6 is a schematic diagram of layout of another optional three-dimensional model provided according to an embodiment of the present disclosure, Figure 6 There are multiple subgraphs in Figure 6 a, Figure 6 b, Figure 6 c. Reference Figure 6 a. For example, one version in the format of the 3D printing device can print 22 target three-dimensional models, and the first preset number is set to 22. When the number of models in the user case is greater than 22, all target three-dimensional models are divided into multiple versions and sent to the same 3D printing device for printing. The optional printing method is as follows: Figure 6 As shown in b, 22 target three-dimensional models (ie, 22 models) can reduce the occupied format. Of course, the first preset number can also be set to 5 / 10 / 15, etc., based on the format of the 3D printing device.

[0228] Exemplarily, the second preset number is set to 5 / 10 / 15, etc. When the number of models is less than the second preset number, there are fewer models in one version, and the target three-dimensional model and the target three-dimensional models of other user cases can be typeset in the same version to avoid a large remaining space in one version and improve the utilization rate of the printing format.

[0229] Exemplarily, after assigning tasks in the cloud, the estimated printing time matching any user case can be obtained. The preset time can be set by the user, such as 1 day, 2 days, 3 days, etc. The estimated printing time can be calculated by establishing a calculation model based on the slice data of the three-dimensional model and the process parameters of the 3D printing equipment to calculate the estimated printing time. It is understandable that when a user case matches a large number of models with a long production time, and the estimated printing time exceeds the preset time, the unprinted target three-dimensional model corresponding to the user case can be sent to other 3D printing devices for printing, such as 3D printing devices that are idle or have less than the preset number of printing tasks, to improve printing efficiency and save printing time.

[0230] Exemplarily, after tasks are assigned in the cloud, the working status of all 3D printing devices can be obtained. When there is a 3D printing device in an idle state, the unprinted target three-dimensional model in the 3D printing device with the largest number of tasks is sent to the idle 3D printing device for printing, so as to improve printing efficiency and utilization of 3D printing devices and save printing time.

[0231] In an optional embodiment, the production strategy is further configured as follows: the cloud determines the production priority corresponding to each user case information, and allocates the classified multiple target three-dimensional models to the 3D printing device according to the order of production priority to produce the three-dimensional models; and / or the cloud adjusts the production priority corresponding to each user case information in response to a priority setting operation triggered by the user, obtains an updated production priority, and produces the three-dimensional model based on the updated production priority.

[0232] For example, after the 3D model is imported into the cloud, the production priority corresponding to the user case can be determined according to the order of import time, and production can be carried out according to the priority. In other embodiments, the automatically generated priority can also be adjusted manually. For example, if some user cases need to be processed urgently, the priority can be readjusted at this time, and the 3D model can be produced according to the adjusted and updated production priority.

[0233] In an optional embodiment of the present disclosure, a system for three-dimensional printing also includes a 3D printing device 100, which is connected to the cloud for communication, and can be used to receive a production task sequence, and print according to a three-dimensional model to form a 3D printed object. The 3D printing device 100 includes a material tray 12, a molding platform 11, and a separation device 13. The material tray 12 is used to hold the printing material, and the molding platform 11 has a molding surface, and is used to adhere the printing material to the molding surface layer by layer to obtain a 3D printed object 8. The separation device 13 is used to separate the 3D printed object 8 from the molding surface, wherein the separation device 13 includes one of a shovel mechanism, an extrusion mechanism, an ejection mechanism, or a laser cutting mechanism.

[0234] Reference Figure 7-Figure 14 In an optional embodiment of the present disclosure, the molding platform 11 is installed on the 3D printing device 100 through a locking mechanism. The locking mechanism of the molding platform 11 includes a locking member 110 and a platform fixing member 118. The locking member 110 includes a fixing frame 111, a fixing plate 112 and a moving block 1123. The moving block 1123 is movably arranged on the fixing frame 111. The fixing plate 112 has a mounting groove, and the mounting groove has an opening. The platform fixing member 118 is used to connect with the molding platform 11. The platform fixing member 118 can extend into the mounting groove through the opening. The fixing plate 112 has a first clamping portion 1121. The first end of the platform fixing member 118 has a second clamping portion 1181 that is clamped and matched with the first clamping portion 1121. The moving block 1123 has a locking position in which the second end of the platform fixing member 118 abuts and an unlocking position in which the second end of the platform fixing member 118 is separated.

[0235] The locking mechanism of the molding platform 11 provided in this embodiment is applied. The locking mechanism of the molding platform 11 includes a locking member 110 and a platform fixing member 118. The fixing frame 111 on the locking member 110 is connected to the fixing plate 112. The moving block 1123 is movably arranged on the fixing frame 111. The platform fixing member 118 is connected to the molding platform 11. The fixing plate 112 is provided with a mounting groove. The mounting groove has an opening, so that the platform fixing member 118 can extend into the mounting groove through the opening. The fixing plate 112 has a first clamping portion 1121. The first end of the locking member 110 has a second clamping portion 1181. When the platform fixing member 118 extends into the mounting groove, the first clamping portion 1121 and the second clamping portion 1181 are clamped and matched. The fixing plate 112 is clamped with the platform fixing piece 118, and then when the moving block 1123 moves to the locking position, the moving block 1123 abuts against the second end of the platform fixing piece 118, and because when the fixing plate 112 is clamped with the platform fixing piece 118, the moving block 1123 has a mutual abutment force on the platform fixing piece 118, so that the platform fixing piece 118 and the fixing plate 112 are clamped and fixed under the action of the force, avoiding the shaking of the forming platform 11 and ensuring that the locking piece 110 is locked with the platform fixing piece 118. When the moving block 1123 switches from the locking position to the unlocking position, the moving block 1123 is separated from the platform fixing piece 118, which makes it easy to separate the locking piece 110 from the platform fixing piece 118. By adopting the above structure, the first clamping portion 1121 of the fixing plate 112 is clamped and fixed with the second clamping portion 1181 of the platform fixing member 118. When the moving block 1123 moves to the locking position, the problem of warping of the molding platform 11 can be avoided, and the shaking of the molding platform 11 can also be avoided, thereby ensuring the printing quality of the printed part and improving the structural reliability of the locking mechanism of the molding platform 11.

[0236] like Figure 8 , Fig.10 , Fig.13 as well as Fig.14As shown, the first clamping portion 1121 includes a clamping groove 1122, and the second clamping portion 1181 includes a wedge block 1182, and the wedge block 1182 extends into the clamping groove 1122 and is clamped with the clamping groove 1122. With the above structure, the first clamping portion 1121 is set as the clamping groove 1122, and the second clamping portion 1181 is a wedge block 1182 set on the platform fixing member 118, so that when the fixing plate 112 extends into the installation groove, the clamping groove 1122 on the fixing plate 112 is clamped with the wedge block 1182 on the platform fixing member 118, so that the platform fixing member 118 can be prevented from falling off from the fixing plate 112, and the locking member 110 and the platform fixing member 118 can be installed easily. In addition, when the moving block 1123 moves downward, the moving block 1123 abuts against the second end of the platform fixing piece 118, and then the moving block 1123 applies a force to the platform fixing piece 118. Since the fixing plate 112 and the platform fixing piece 118 are clamped together, it can be ensured that under the action of the moving block 1123, there is still an abutting force when the fixing plate 112 and the platform fixing piece 118 are clamped together. This can ensure that the locking piece 110 and the platform fixing piece 118 are clamped stably and avoid the locking piece 110 and the platform fixing piece 118 from separating from each other. This can ensure that the clamping is firm and avoid the platform fixing piece 118 from shaking while ensuring the stability of the forming platform 11.

[0237] It should be noted that a third limiting slope is provided on the fixing plate 112, and a fourth limiting slope is provided on the first end of the platform fixing component 118. When the fixing plate 112 extends into the installation groove of the platform fixing component 118, the third limiting slope of the fixing plate 112 is fitted with the fourth limiting slope of the platform fixing component 118, and the angle between the third limiting slope and the horizontal plane and the angle between the fourth limiting slope and the horizontal plane are both obtuse angles, which can prevent the platform fixing component 118 from detaching from the fixing plate 112 and ensure that the fixing plate 112 and the platform fixing component 118 are clamped and fixed to each other.

[0238] like Fig.10As shown, the moving block 1123 has a first limiting slope 1131, and the second end of the platform fixing member 118 has a second limiting slope 1183. When the moving block 1123 is in the locking position, the first limiting slope 1131 abuts against the second limiting slope 1183. When the moving block 1123 is in the unlocking position, the first limiting slope 1131 is separated from the second limiting slope 1183. With the above structure, by providing the first limiting slope 1131 on the moving block 1123, the second end of the platform fixing member 118 has the second limiting slope 1183, and then when the moving block 1123 moves downward, the moving block 1123 abuts against the second end of the platform fixing member 118, so that the first limiting slope 1131 can abut against the second limiting slope 1183, so that the force of the moving block 1123 on the platform fixing member 118 is at the first limiting slope 1131 and the second limiting slope 1183. Under the action of the inclined surface 1183, the force is decomposed into a vertical downward force and a horizontal force. In this way, when it is decomposed into a vertical downward force, it can ensure that the platform fixing member 118 and the fixing plate 112 are abutted and fixed. When it is decomposed into a horizontal force, it can ensure that the wedge block 1182 of the platform fixing member 118 and the clamping groove 1122 of the fixing plate 112 are clamped and fixed. This can prevent the platform fixing member 118 from tilting up and ensure the stability of the forming platform 11 connected to the platform fixing member 118.

[0239] It should be noted that in this embodiment, the angle between the first limiting slope 1131 and the horizontal plane and the angle between the second limiting slope 1183 and the horizontal plane are both set to acute angles, which can ensure that the moving block 1123 is abutted against the platform fixing member 118, and the first limiting slope 1131 is abutted against the second limiting slope 1183 to achieve the function of fixing the platform fixing member 118.

[0240] like Figure 8 , Fig.10 as well as Fig.11As shown, the moving block 1123 includes a base 1132 and a pressing block 1133 arranged on the base 1132. The pressing block 1133 is passed through the fixing frame 111 and is slidably connected to the fixing frame 111. The lower end of the pressing block 1133 passes through the fixing frame 111. When the moving block 1123 is in the locking position, the lower end of the pressing block 1133 abuts against the second end of the platform fixing member 118. When the moving block 1123 is in the unlocking position, the lower end of the pressing block 1133 is separated from the second end of the platform fixing member 118. By adopting the above structure, by setting the base 1132 and the pressing block 1133, the pressing block 1133 can be passed through the fixed frame 111 and slidably connected with the fixed frame 111. When the movable block 1123 moves vertically downward and the movable block 1123 is in the locking position, the lower end of the pressing block 1133 passes through the fixed frame 111 and can slide relative to the fixed frame 111, so that the lower end of the pressing block 1133 can be abutted against the second end of the platform fixing member 118. When the movable block 1123 moves vertically upward and the movable block 1123 is switched from the locking position to the unlocking position, the lower end of the pressing block 1133 is separated from the second end of the platform fixing member 118, ensuring that the movable block 1123 can be abutted and fixed to the platform fixing member 118 under the action of the pressing block 1133.

[0241] It should be noted that a moving block 1123 is penetrated at the upper end of the pressing block 1133, and a third screw is provided on the moving block 1123. The third screw penetrates the moving block 1123 and is threadedly connected to the pressing block 1133, so that it is convenient to fix the pressing block 1133 on the moving block 1123 and facilitate the pressing block 1133 to move along with the moving block 1123.

[0242] In this embodiment, the first limiting slope 1131 is set at the lower end of the pressing block 1133, and the second limiting slope 1183 is set at the second end of the platform fixing member 118, so that when the pressing block 1133 moves downward and abuts against the second end of the platform fixing member 118, the first limiting slope 1131 abuts against the second limiting slope 1183.

[0243] like Fig.11 and Fig.12 As shown, a first spring 1134 is provided between the fixed frame 111 and the moving block 1123, the first end of the first spring 1134 abuts against the lower end of the moving block 1123, and the second end of the first spring 1134 abuts against the fixed frame 111. With the above structure, by providing the first spring 1134 between the fixed frame 111 and the moving block 1123, the moving block 1123 can be reset under the action of the first spring 1134, and then when the moving block 1123 is in the locked position, the moving block 1123 moves downward to compress the first spring 1134, and when the moving block 1123 is in the unlocked position, the moving block 1123 is reset under the action of the first spring 1134.

[0244] In this embodiment, the fixing plate 112 has a lifting mechanism connection part, the fixing frame 111 extends vertically, and the fixing plate 112 extends horizontally and is connected to the lower end of the fixing frame 111. With the above structure, a lifting mechanism connection part is provided on the fixing plate 112, and the platform fixing member 118 extends into the installation groove of the locking member 110, so that the platform fixing member 118 can be locked and fixed, and under the action of the lifting mechanism connection part, the locking mechanism is connected to the lifting mechanism of the 3D printing device, so that the molding platform 11 can be driven to lift and move, which is convenient for 3D printing operations.

[0245] like Fig.11 and Fig.12 As shown, a sliding guide structure 114 is provided between the moving block 1123 and the fixed frame 111. With the above structure, by providing the sliding guide structure 114, it is possible to avoid the problem of the moving block 1123 getting stuck when the moving block 1123 moves, and ensure that the moving block 1123 can move along the fixed frame 111 under the action of the sliding guide structure 114. A guide block 115 is provided on the moving block 1123, and the guide block 115 is slidably provided on the moving block 1123 in the transverse direction, and the sliding guide structure 114 is provided between the guide block 115 and the fixed frame 111. With the above structure, by providing the guide block 115 on the moving block 1123, the guide block 115 can be movably provided on the moving block 1123 in the transverse direction, so that it can be ensured that the moving block 1123 plays a role of sliding guide under the action of the guide block 115.

[0246] like Fig.11 and Fig.12As shown, the sliding guide structure 114 includes a first guiding bevel 1141 and a second guiding bevel 1142. The first guiding bevel 1141 is arranged on the side wall of the guide block 115 facing the fixed frame 111, and the second guiding bevel 1142 is arranged on the side wall of the fixed frame 111 facing the guide block 115. The first guiding bevel 1141 is in contact with the second guiding bevel 1142. By adopting the above structure, a first guide bevel 1141 is provided on the side wall of the guide block 115 facing the fixed frame 111, and a second guide bevel 1142 is provided on the side wall of the fixed frame 111 facing the guide block 115, so that the first guide bevel 1141 can play a role of sliding guide under the action of the second guide bevel 1142, so that when the moving block 1123 moves downward, the guide block 115 also moves downward, and the first guide bevel 1141 and the second guide bevel 1142 are slidably matched, so that the guide block 115 moves laterally toward the direction close to the moving block 1123, and when the moving block 1123 moves upward, the guide block 115 moves laterally toward the direction away from the moving block 1123, so that the moving block 1123 can be prevented from getting stuck.

[0247] like Fig.12 As shown, the moving block 1123 is provided with a first screw 1135 and a second spring 1136, the first screw 1135 is passed through the guide block 115 and is threadedly connected to the moving block 1123, and the second spring 1136 is located between the guide block 115 and the moving block 1123. With the above structure, by using the first screw 1135 passed through the guide block 115 and threadedly connected to the moving block 1123, the second spring 1136 is sleeved on the first screw 1135 and is located between the guide block 115 and the moving block 1123, so that when the guide block 115 moves in the direction away from the moving block 1123 in the lateral direction, the second spring 1136 can reset the guide block 115, ensuring that the guide block 115 can slide with the fixing frame 111.

[0248] like Fig.12As shown, the moving block 1123 includes a first lifting block 1137 and a second lifting block 1138. The first lifting block 1137 is arranged above the second lifting block 1138. The moving block 1123 also includes a second screw 116 and a third spring 117. The second screw 116 is penetrated by the first lifting block 1137 and is threadedly connected with the second lifting block 1138. The third spring 117 is sleeved on the second screw 116. The first end of the third spring 117 abuts against the first lifting block 1137, and the second end of the third spring 117 abuts against the second lifting block 1138. A driving member 1111 is provided on the fixed frame 111. The driving member 1111 is drivingly connected to the first lifting block 1137 to drive the first lifting block 1137 to rise and fall relative to the fixed frame 111. With the above structure, a first lifting block 1137 and a second lifting block 1138 are arranged, a second screw 116 and a third spring 117 are arranged between the first lifting block 1137 and the second lifting block 1138, the second screw 116 is sequentially passed through the first lifting block 1137 and the second lifting block 1138 and is threadedly connected with the second lifting block 1138, the third spring 117 can play a role of elastic buffering, and a driving member 1111 is arranged on the fixed frame 111, the driving member 1111 can drive the first lifting block 1137 to move downward, and under the action of the third spring 117, the second lifting block 1138 moves downward at the same time, so that the locking member 110 can be locked with the platform fixing member 118, so that under the action of the driving member 1111, the moving block 1123 can be easily driven to move.

[0249] like Figures 7 to 11 As shown, the locking mechanism of the forming platform 11 also includes a driving member 1111, which includes a rotating shaft 1112, a handle 1113 and a rotating cam 1114. The rotating shaft 1112 is laterally penetrated through the fixed frame 111, the handle 1113 is connected to the rotating shaft 1112, the rotating cam 1114 is arranged on the rotating shaft 1112 and abuts against the upper end of the moving block 1123, the handle 1113 drives the rotating shaft 1112 to rotate, and the rotating shaft 1112 uses the rotating cam 1114 to drive the moving block 1123 to move from the unlocking position to the locking position. By adopting the above structure, the rotating shaft 1112 is rotatably arranged on the fixed frame 111 in the horizontal direction, and the handle 1113 is connected to the rotating shaft 1112, so that it is convenient to drive the rotating shaft 1112 to rotate by controlling the handle 1113, and a rotating cam 1114 is provided on the rotating shaft 1112. When the rotating shaft 1112 rotates, the rotating cam 1114 can abut against the moving block 1123. In this way, when the rotating cam 1114 rotates, it can drive the moving block 1123 to move vertically downward and then put the moving block 1123 in a locking position, so that the locking member 110 is locked with the platform fixing member 118, so that the driving method is simple and easy to control.

[0250] It should be noted that, in other embodiments, the driving member 1111 can also be a crank slider mechanism, which makes it easy to achieve quick locking and quick disassembly through the crank; or the rotating cam 1114 can be replaced with a knob-type threaded handle 1113, which can facilitate the moving block 1123 to be raised and lowered without setting the rotating cam 1114 and the first spring 1134.

[0251] like Fig.11 As shown, the locking mechanism of the molding platform 11 also includes a position detection member 119 for detecting the position of the handle 1113. With the above structure, by setting the position detection member 119, it is possible to easily detect the position of the handle 1113, which is used to detect whether it is locked in place. It should be noted that in other embodiments, a grating sensor such as a code disk is used to record the number of rotations to achieve mechanical and electrical locking reminders.

[0252] like Fig.13 As shown, the platform fixing member 118 includes a first locking block 1184 and a second locking block 1185 arranged at intervals, and the first locking block 1184 and the second locking block 1185 are used to extend into the installation groove. With the above structure, by arranging the first locking block 1184 and the second locking block 1185, it is convenient to extend the first locking block 1184 and the second locking block 1185 into the installation groove of the fixing plate 112.

[0253] Another embodiment of the present disclosure provides a 3D printing device, which includes a lifting mechanism, a molding platform 11 and a locking mechanism, wherein the molding platform 11 is arranged on the locking mechanism, the lifting mechanism is connected to the lifting mechanism connecting portion of the locking mechanism, and the locking mechanism is the locking mechanism provided above. With the above structure, the molding platform 11 is connected to the locking mechanism, and the lifting mechanism is connected to the lifting mechanism connecting portion of the locking mechanism, which makes it easy to lock the molding platform 11 and drive the molding platform 11 to lift and lower.

[0254] Reference Figure 15-Figure 21In an optional embodiment of the present disclosure, the material tray 12 is installed on the substrate 120 of the 3D printing device through a floating material tray mechanism, and the floating material tray mechanism includes the substrate 120, a floating block 125, and a locking assembly 126. The substrate 120 has a material tray 12 mounting groove, and the material tray 12 mounting groove is arranged on the substrate 120. The side of the material tray 12 mounting groove has an opening for inserting the material tray 12; the floating block 125 is vertically arranged below the substrate 120 in a floating manner. When the floating block 125 floats up, the floating block 125 The upper end of 25 can extend into the mounting groove of the material tray 12 to push against the material tray 12; the locking assembly 126 includes a driving member 1261 and a locking member 1262, and the driving member 1261 and the locking member 1262 are arranged on one side of the substrate 120 or the floating block 125, and the driving member 1261 can drive the floating block 125 to float; the locking member 1262 can keep the floating block 125 floating to lock the material tray 12, or, the locking member 1262 can keep the floating block 125 sinking so that the material tray 12 can be taken in and out of the opening.

[0255] By applying the technical solution disclosed in the present invention, the floating tray mechanism includes a base plate 120, a floating block 125 and a locking assembly 126. The driving member 1261 is used to drive the floating block 125 to float up, and the tray 12 is installed in the tray 12 installation groove on the base plate 120, so that the upper end of the floating block 125 extends into the tray 12 installation groove and presses against the tray 12. At this time, the floating block 125 has a small pressing force on the tray 12. The locking member 1262 is used to keep the floating block 125 floating up and provide a pressing force for the tray 12 to lock the tray 12, so that the tray 12 can be locked in the tray 12 installation groove. Alternatively, the locking member 1262 is used to keep the floating block 125 sinking to provide space for taking and placing the tray 12, and the tray 12 is inserted into the tray 12 installation groove from the opening, and then the locking member 1262 is separated from the floating block 125, and the driving member 1261 is used to drive the floating block 125 to float up. The upper end of the floating block 125 extends into the mounting groove of the material tray 12 and presses against the material tray 12. At this time, the floating block 125 has a relatively large pressing force on the material tray 12, which can lock the material tray 12 and realize locking of the material tray 12 in the mounting groove of the material tray 12. The above solution realizes free placement of the material tray 12 on the substrate 120, and enables the material tray 12 to be firmly locked on the substrate 120.

[0256] It should be noted that the locking member 1262 can lock the floating block 125 in a sunken state, so that the tray 12 can be taken out of the mounting groove of the tray 12. In another case, the locking member 1262 can also be used to provide a pressing force for the floating block 125 to lock the tray 12 in the mounting groove of the tray 12. Of course, the driving force provided by the driving member 1261 is different in the two cases. Among them, the floating block 125 only partially extends into the mounting groove of the tray 12, that is, the upper end of the floating block 125.

[0257] like Figures 15 to 19 As shown, the lower surface of the base plate 120 is provided with a guide post 121, and the lower end of the guide post 121 is provided with an annular flange, and the floating block 125 can be floated on the guide post 121, and the driving member 1261 includes a return spring that is passed through the guide post 121, and the two ends of the return spring are respectively in contact with the annular flange and the lower surface of the floating block 125. The guide post 121 can be used to arrange the return spring and the floating block 125 on the base plate 120. The return spring can provide a driving force for the floating block 125, so that the floating block 125 automatically floats up to resist the material tray 12.

[0258] like Fig. 20 As shown, the substrate 120 includes a plate body 122 and two pressing blocks 123 arranged on the upper surface of the plate body 122. The two pressing blocks 123 are arranged opposite to each other along the length direction of the plate body 122. The two pressing blocks 123 and the upper surface of the plate body 122 jointly form a mounting groove for the material tray 12. The substrate 120 with the above structure uses the plate body 122 and the two pressing blocks 123 to form the mounting groove for the material tray 12, which has the advantages of simple structure and easy assembly. Among them, the pressing block 123 is an L-shaped structure.

[0259] Specifically, two small pressing blocks 123 are further provided on the upper surface of the plate body 122, and the two small pressing blocks 123 are located between the two pressing blocks 123, and are used to be pressed on the material tray 12. The base plate 120 has a connecting groove 124 that is vertically penetrated, and the connecting groove 124 is connected to the mounting groove of the material tray 12. The upper surface of the floating block 125 is provided with a protrusion 1255, and the protrusion 1255 is penetrated in the connecting groove 124 and can abut against the material tray 12. With the above arrangement, the protrusion 1255 passes through the connecting groove 124, and can abut against the material tray 12, which is convenient for arrangement and processing while ensuring the structural strength of the base plate 120.

[0260] It should be noted that a floating block 125, a guide column 121 and a return spring are correspondingly arranged below each pressing block 123. When the material tray 12 is inserted into the material tray 12 installation slot, the two floating blocks 125 can be used to form abutment against both sides of the material tray 12, so that the positioning effect of the material tray 12 is better.

[0261] like Fig.15 and Fig.16As shown, in the first embodiment of the present disclosure, the locking member 1262 includes an electromagnet 1271 and a magnetic attraction plate 1274, one of which is arranged on the substrate 120, and the other of which is arranged on the side of the floating block 125 away from the substrate 120. When the electromagnet 1271 is in a power-off state, the driving member 1261 drives the floating block 125 to float and the material tray 12 can be taken in and out of the opening; when the electromagnet 1271 is in a power-on state, the electromagnet 1271 can be magnetically matched with the magnetic attraction plate 1274, so that the floating block 125 locks the material tray 12. When the electromagnet 1271 is in a power-on state, it can form a magnetic attraction match with the magnetic attraction plate 1274 to provide a pressing force for the floating block 125 and lock the material tray 12. When the electromagnet 1271 is in a power-off state, the electromagnet 1271 has no magnetic force on the magnetic attraction plate 1274. At this time, the driving force provided by the driving member 1261 is small, so that the material tray 12 can be easily taken in and out of the mounting groove of the material tray 12. Of course, the electromagnet 1271 can also be provided on the lower surface of the substrate 120 and the upper surface of the floating block 125 without providing the magnetic attraction plate 1274.

[0262] In other embodiments, when the electromagnets 1271 are disposed on both the lower surface of the substrate 120 and the upper surface of the floating block 125, a repulsive force may be formed between the two electromagnets 1271 to keep the floating block 125 sinking, and the material tray 12 may be conveniently taken in and out of the mounting groove of the material tray 12. When the two electromagnets 1271 are powered off, the driving force of the driving member 1261 is used to float the floating block 125 to lock the material tray 12. Of course, the magnetic attraction plate 1274 may also be disposed on the floating block 125, and the electromagnet 1271 may be disposed on the substrate 120.

[0263] like Fig.15 As shown, the magnetic attraction plate 1274 is arranged on the lower surface of the floating block 125, and the floating block 125 has a first avoidance groove 1251 which is arranged through, and the electromagnet 1271 is located in the first avoidance groove 1251. With the above arrangement, the first avoidance groove 1251 can be used to avoid the electromagnet 1271 to save space and reduce space occupancy. An elastic member 1283 is also arranged on the side of the magnetic attraction plate 1274 away from the floating block 125, and the magnetic attraction plate 1274 is connected to the lower surface of the floating block 125 through a connecting member, and the two ends of the elastic member 1283 are respectively abutted against the magnetic attraction plate 1274 and the connecting member. The elastic member 1283 can provide a movement space for the magnetic attraction plate 1274 and play a buffering role. Among them, the elastic member 1283 is a buffer spring.

[0264] The working principle of the above-mentioned embodiment 1 is as follows: the locking member 1262 includes an electromagnet 1271 and a magnetic attraction plate 1274. The electromagnet 1271 is fixed on the lower surface of the base plate 120. The floating block 125 has a first avoidance groove 1251 that is arranged through. The magnetic attraction plate 1274 is arranged on the lower surface of the floating block 125 and is located in the first avoidance groove 1251. An elastic member 1283 is also arranged on the side of the magnetic attraction plate 1274 away from the floating block 125. When the electromagnet 1271 is in a power-off state, the return spring drives the floating block 125 to float and the material tray 12 can be taken in and out from the opening. At this time, the magnetic attraction plate 1274 contacts the lower surface of the electromagnet 1271 under the action of the elastic member 1283. Among them, the displacement stroke that the elastic member 1283 can provide is smaller than the displacement stroke provided by the return spring of the floating block 125, and there is a gap between the floating block 125 and the magnetic attraction plate 1274. When the material tray 12 is inserted into the mounting groove of the material tray 12, the material tray 12 contacts the protrusion 1255 and presses down the protrusion 1255. During this process, the floating block 125 moves downward, driving the magnetic suction plate 1274 to move downward. The magnetic suction plate 1274 is separated from the electromagnet 1271, and a small gap is generated between the two. After the electromagnet 1271 is in the power-on state, the electromagnet 1271 can cooperate with the magnetic suction plate 1274 by magnetic attraction. The magnetic suction plate 1274 provides an upward thrust for the floating block 125, so that the magnetic suction plate 1274 pushes the floating block 125 upward against the material tray 12, so that the floating block 125 locks the material tray 12. It should be noted that after the material tray 12 is inserted into the mounting groove of the material tray 12 and the floating block 125 sinks, the electromagnet 1271 can be immediately controlled to be in the power-on state, or the 3D printer can be waited for a period of time, such as after printing a few layers, and then the power is turned on to make the floating block 125 lock the material tray 12.

[0265] like Figures 17 to 19 As shown, the present disclosure provides a second embodiment, and the difference between the second embodiment and the first embodiment is that in the second embodiment, the floating block 125 has a floating position and a sinking position. When the floating block 125 is in the floating position, the floating block 125 extends into the mounting groove of the material tray 12 to support and lock the material tray 12. When the floating block 125 moves from the floating position to the sinking position, the floating block 125 is separated from the material tray 12.

[0266] The locking member 1262 includes a movable member, which is movably disposed on the base plate 120. The movable member has a contact state with the floating block 125 and a separation state with the floating block 125. When the movable member is in the contact state, the floating block 125 is kept in the sinking position. When the movable member is in the separation state, the driving member 1261 drives the floating block 125 to move from the sinking position to the floating position. By making the movable member contact with the floating block 125, the floating block 125 can be driven to float vertically, so that the floating block 125 is locked in the sinking position, and the tray 12 can be easily taken in and out of the tray 12 installation groove.

[0267] The movable member can be directly moved in the vertical direction, and a locking structure is provided to keep the movable member in contact with the floating block 125, so that the floating block 125 is kept in the sinking position. Of course, the movable member can also be set as a rotating shaft 1272, and a cam 1273 is provided on the rotating shaft 1272. The movable member includes a rotating shaft 1272 rotatably provided on the base plate 120, the rotating shaft 1272 extends in the horizontal direction, and a cam 1273 is provided on the side wall of the rotating shaft 1272. During the rotation of the rotating shaft 1272, the cam 1273 can drive the floating block 125 to move. The rotation of the rotating shaft 1272 drives the rotation of the cam 1273, thereby realizing the locking of the floating block 125, which has the advantages of simple structure and easy operation. The distance between the center line of the cam 1273 and the center line of the rotating shaft 1272 can be set according to actual conditions, generally less than 10 mm.

[0268] like Fig.17 As shown, the locking assembly 126 further includes a bearing seat 128 and a bearing 1281. The bearing seat 128 is disposed on the base plate 120. The bearing seat 128 has a through hole. The bearing 1281 is disposed in the through hole. The rotating shaft 1272 is passed through the inner hole of the bearing 1281. With the above structure, the rotating shaft 1272 can be easily fixed on the base plate 120 by using the bearing seat 128. The bearing 1281 can reduce the friction between the rotating shaft 1272 and the bearing seat 128 when the rotating shaft 1272 rotates, so as to reduce wear.

[0269] In the second embodiment, the locking assembly 126 further includes a handle 1282, which is connected to one end of the rotating shaft 1272 away from the cam 1273, and the handle 1282 is located at the side of the base plate 120. The handle 1282 facilitates the operator to rotate the rotating shaft 1272. The handle 1282, the rotating shaft 1272 and the cam 1273 form a labor-saving lever structure.

[0270] like Fig.17As shown, the upper surface of the floating block 125 is provided with a second avoidance groove 1252, and the bottom wall of the second avoidance groove 1252 is provided with a first rubber pad 1253. The cam 1273 is located in the second avoidance groove 1252, and the cam 1273 can abut against the first rubber pad 1253. The second avoidance groove 1252 can be used to avoid the cam 1273, so as to reduce the space occupied by the cam 1273, which is conducive to the miniaturization of the device. By using the first rubber pad 1253, the wear of the cam 1273 on the floating block 125 can be reduced, and the service life of the device can be extended. The floating block 125 is provided with a second rubber pad 1254, and when the floating block 125 is in the floating position, the second rubber pad 1254 is in contact with the lower surface of the substrate 120. By using the second rubber pad 1254, the impact force of the floating block 125 on the substrate 120 when floating can be reduced, so as to extend the service life of the substrate 120. It should be noted that the driving force provided by the return spring in the second embodiment is greater than the driving force provided by the return spring in the first embodiment.

[0271] Among them, in the second embodiment, a rotating shaft 1272 is provided corresponding to each floating block 125 to respectively keep the corresponding floating block 125 in the sinking position. When the floating block 125 is in the floating position, the distance between the protrusion 1255 and the pressing block 123 is smaller than the thickness dimension of the edge of the material tray 12. At this time, it is difficult to put the material tray 12 in, which can ensure the interchangeability of the material tray 12. After the material tray 12 with slight differences in thickness is put in, it can be supported by the protrusion 1255. When the floating block 125 is in the sinking position, the distance between the protrusion 1255 and the pressing block 123 is larger than the thickness dimension of the edge of the material tray 12. At this time, the material tray 12 is very easy to put in. The cam 1273 can float the floating block 125 to the floating position so that the protrusion 1255 presses the material tray 12.

[0272] like Fig.21As shown, another embodiment of the present disclosure provides a 3D printing device, the 3D printing device includes a tray 12 and a floating tray mechanism, the tray 12 can be placed in the tray 12 mounting groove of the floating tray mechanism, and the floating tray mechanism is the floating tray mechanism provided above. With the 3D printing device, the driving member 1261 is used to drive the floating block 125 to float up, and the tray 12 is installed in the tray 12 mounting groove on the substrate 120, so that the upper end of the floating block 125 extends into the tray 12 mounting groove and presses against the tray 12. At this time, the floating block 125 has a small pressing force on the tray 12. The locking member 1262 is used to keep the floating block 125 floating and provide a pressing force for the tray 12 to lock the tray 12, so that the tray 12 can be locked in the tray 12 mounting groove. Alternatively, the locking member 1262 is used to keep the floating block 125 sinking to provide space for the tray 12 to be taken and placed, and the tray 12 is inserted into the mounting groove of the tray 12 through the opening, and then the locking member 1262 is separated from the floating block 125, and the driving member 1261 is used to drive the floating block 125 to float. The upper end of the floating block 125 is extended into the mounting groove of the tray 12 and abuts against the tray 12. At this time, the floating block 125 has a relatively large abutting force on the tray 12, and can lock the tray 12, so that the tray 12 is locked in the mounting groove of the tray 12. The tray 12 can be freely taken and placed on the substrate 120, and the tray 12 can be firmly locked on the substrate 120.

[0273] In this embodiment, the 3D printing device includes an optical machine, a molding platform, a lifting mechanism and a floating tray mechanism. The molding platform is located above the floating tray mechanism. The molding platform is vertically movably arranged on the lifting mechanism. The lifting mechanism drives the molding platform to move vertically to approach or move away from the tray 12. The optical machine is located below the floating tray mechanism to expose the tray 12 to cure the photosensitive resin on the molding platform and finally form a 3D printed object.

[0274] Reference Figure 22-Figure 25 In an optional embodiment of the present disclosure, the 3D printing device further includes a liquid adding mechanism 15, which includes: a liquid adding box 150, having an inner cavity 151 and a liquid inlet 152 and a liquid outlet 153 connected to the inner cavity 151; a liquid inlet pump 157, one end of the liquid inlet pump 157 is connected to the liquid inlet 152, and the other end of the liquid inlet pump 157 is connected to the material supply container, and the liquid inlet pump 157 is used to transport the printing material from the material supply container to the liquid adding box 150; a liquid outlet pump 158, one end of the liquid outlet pump 158 is connected to the liquid outlet 153, and the other end of the liquid outlet pump 158 is connected to the material tray of the 3D printing device, and the liquid outlet pump 158 is used to transport the printing material in the liquid adding box 150 to the material tray of the 3D printing device; a controller, which is in communication with the liquid inlet pump 157 and the liquid outlet pump 158, and the controller is used to control the start or stop of the liquid inlet pump 157 and the liquid outlet pump 158.

[0275] Applying the technical solution of the present disclosure, the liquid adding mechanism includes a liquid adding box 150, a liquid inlet pump 157, a liquid outlet pump 158 and a controller. When in use, the liquid inlet pump 157 is started by the controller, and the printing material in the supply container is pumped into the liquid adding box 150 by the liquid inlet pump 157, and the printing material is stored by the inner cavity 151 of the liquid adding box 150, and then the liquid outlet pump 158 is started by the controller to pump the printing material in the liquid adding box 150 into the material tray of the 3D printing device. Compared with the method of directly adding liquid to the material tray by the supply mechanism and replacing the supply mechanism, the continuous operation of the 3D printing device is realized through the transfer of the liquid adding box 150, while avoiding the inconvenience caused by the liquid adding operation. It should be noted that the liquid adding mechanism in the present disclosure can adopt either pumping or gravity liquid adding, and the liquid adding mechanism 15 can realize transfer liquid adding, which can realize low liquid level printing, facilitate the control of the adding process of the printing material, and will not cause additional waste of printing materials.

[0276] like Fig. 22 As shown, the liquid adding mechanism further includes a liquid level detection member 1551 which is in communication with the controller, and the liquid level detection member 1551 is disposed on the liquid adding box 150, and the liquid level detection member 1551 is used to detect the liquid level of the inner cavity 151. With the above arrangement, the liquid inlet and outlet in the liquid adding box 150 can be controlled so that the liquid amount in the liquid adding box 150 meets the requirements.

[0277] like Fig.24 As shown, the liquid level detection member 1551 includes a capacitance liquid level gauge 1552, and the liquid adding mechanism also includes a connecting pipe 1543 disposed on the outer wall of the liquid adding box 150, the connecting pipe 1543 is connected to the inner cavity 151, and the capacitance liquid level gauge 1552 is disposed on the connecting pipe 1543 and can detect the highest liquid level of the connecting pipe 1543. By using the capacitance liquid level gauge 1552 to detect the highest liquid level of the liquid adding box 150, the maximum amount of liquid in the liquid adding box 150 can be controlled.

[0278] Specifically, when the liquid level in the connecting tube 1543 reaches the capacitance liquid level gauge 1552 , the dielectric constant of the sensor of the capacitance liquid level gauge 1552 changes, and an electrical signal is output, thereby displaying the liquid level in the connecting tube 1543 .

[0279] like Fig.24 As shown, the liquid level detection member 1551 further includes an ultrasonic liquid level meter 1553, and the liquid adding mechanism further includes a bracket 1544 disposed on the top wall of the liquid adding box 150. A detection opening is disposed on the top wall of the liquid adding box 150, and the bracket 1544 has a detection channel connected to the detection opening. The ultrasonic liquid level meter 1553 is disposed on the bracket 1544, and the ultrasonic transmitting end of the ultrasonic liquid level meter 1553 is disposed opposite to the detection channel. The ultrasonic liquid level meter 1553 can be used to detect the liquid level in the liquid adding box 150 at any time, thereby controlling the liquid output of the liquid outlet 153.

[0280] Specifically, the ultrasonic level meter 1553 uses the principle of ultrasonic reflection. The ultrasonic wave enters the liquid adding box 150 through the detection channel and the detection opening, and forms reflection after contacting the liquid surface, so as to measure the height of the liquid surface.

[0281] The inner cavity 151 is provided with a temperature regulating component 154 and a temperature detecting component 1545, and the temperature detecting component 1545 is arranged at the liquid inlet 152 or the liquid outlet 153; the temperature regulating component 154 is connected to the controller for communication, and the controller is used to control the working state of the temperature regulating component 154. When the resin liquid enters the inner cavity 151 of the liquid adding box 150 through the liquid inlet 152 of the liquid adding box 150, the temperature of the liquid can be detected by the temperature detecting component 1545. When the temperature of the liquid does not meet the requirements, the control board 155 controls the temperature regulating component 154 to switch to the working state according to the detected liquid temperature, and controls the output power and heating time of the temperature regulating component 154, so that the temperature of the liquid in the liquid adding box 150 meets the requirements.

[0282] In this embodiment, the temperature detection component 1545 is a temperature measuring probe arranged on the top wall of the liquid adding box 150. The temperature adjustment component 154 is controlled by the control board 155, so that the resin in the liquid adding box 150 can be quickly and evenly heated to the target temperature of 20°C to 25°C.

[0283] like Fig.25 As shown, the temperature regulating component 154 includes a temperature control plate 1541 and a plurality of heat sinks 1542. The temperature control plate 1541 and the heat sink 1542 are arranged in the liquid adding box 150. The temperature control plate 1541 is used to heat or cool the liquid in the liquid adding box 150. The temperature regulating component 154 using the above structure has the advantages of simple structure and easy setting. Among them, the heat sink 1542 extends along the length direction of the temperature control plate 1541, and the plurality of heat sinks 1542 are arranged on the lower surface of the temperature control plate 1541 at intervals along the width direction of the temperature control plate 1541. Exemplarily, the temperature regulating component 154 has both heating and cooling functions. At the same time, the heat sink 1542 is used for heat conduction to accelerate the heating or cooling speed of the liquid.

[0284] like Fig. 22 As shown, the liquid adding mechanism further includes a collecting groove 156. The side wall of the liquid adding box 150 has an overflow port. The collecting groove 156 is located on one side of the liquid adding box 150 and is arranged corresponding to the overflow port. The collecting groove 156 can be used to collect the liquid overflowing from the overflow port to prevent the liquid from flowing arbitrarily and being inconvenient to clean. In this embodiment, the collecting groove 156 has a handle so that the operator can take and put and clean the liquid therein.

[0285] like Fig. 22As shown, the liquid adding mechanism further includes a base 1561, and the liquid adding box 150 and the collecting tank 156 are both arranged on the base 1561. The edge of the base 1561 is provided with a baffle 1562 extending upward, and the upper edge of the baffle 1562 is higher than the notch of the collecting tank 156. The base 1561 can be used to support the liquid adding box 150 and the collecting tank 156, and the baffle 1562 can be used to block the liquid overflowing from the collecting tank 156 and overflowing to the base 1561, so as to prevent the liquid from flowing arbitrarily and being inconvenient to clean.

[0286] In this embodiment, a groove is provided on the base 1561, and the collecting tank 156 is placed in the groove. A liquid leakage sensor for detecting liquid leakage is provided in the collecting tank 156. The liquid leakage sensor can detect the overflow of the collecting tank 156 to remind the user of the liquid state of the collecting tank 156. Specifically, the liquid leakage sensor can be a capacitive sensor. The liquid collected in the collecting tank 156 is detected by the change of the electrical signal of the capacitive sensor.

[0287] In this embodiment, the base 1561 includes a horizontal frame and a vertical frame, the vertical frame is connected to one side of the horizontal frame, the liquid inlet pump 157 and the liquid outlet pump 158 are both arranged on the vertical frame, the liquid adding box 150 and the collecting tank 156 are both arranged on the horizontal frame, the baffle 1562 is arranged on the horizontal frame and extends along the circumference of the horizontal frame, and the two ends of the baffle 1562 are respectively connected to the vertical frame. The above-mentioned base 1561 has the advantages of simple structure and easy processing.

[0288] The liquid inlet 152 is disposed on the top wall of the liquid adding box 150, thereby avoiding siphoning and preventing the liquid from flowing out of the liquid inlet 152. Specifically, the liquid outlet 153 is disposed on the bottom wall of the liquid adding box 150, thereby avoiding air from entering the liquid adding box 150, thereby avoiding the generation of bubbles and entering the material tray, so as to achieve a better printing effect.

[0289] Another embodiment of the present disclosure provides a 3D printing device, which includes a feed container, a body, and a liquid adding mechanism. The feed container is used to store printing materials; the body is provided with a feed container and a material tray; the liquid adding mechanism is provided on the body, the feed container is connected to the liquid inlet 152 of the liquid adding mechanism, and the material tray is connected to the liquid outlet 153 of the liquid adding mechanism, and the liquid adding mechanism is the liquid adding mechanism provided above. The above-mentioned 3D printing device is adopted, and the liquid inlet pump 157 is started by the controller, and the printing material in the feed container is pumped into the liquid adding box 150 by the liquid inlet pump 157, and the printing material is stored by the inner cavity 151 of the liquid adding box 150, and then the liquid outlet pump 158 is started by the controller to pump the printing material in the liquid adding box 150 into the material tray of the 3D printing device. Compared with the method of directly adding liquid to the material tray by the supply mechanism and replacing the supply mechanism, the continuous operation of the 3D printing device is realized through the transfer of the liquid adding box 150, while avoiding the inconvenience caused by the liquid adding operation.

[0290] In this embodiment, the feed container is located below the liquid adding box 150 of the liquid adding mechanism. With the above arrangement, the siphon effect can be avoided to prevent the liquid from flowing out of the liquid inlet 152.

[0291] In an optional embodiment of the present disclosure, the separation device includes a shovel mechanism, which may be located between the molding platform and the material tray, and may be used to automatically separate the 3D printed object from the molding surface after printing is completed, so that the molding platform can continue to be used to cooperate with the printing of the next 3D printed object without the operator manually removing the molding platform from the printer to perform shovel operations. For example, the shovel mechanism may include a shovel assembly and a shovel drive assembly. Among them, the shovel assembly may include a shovel. The shovel drive assembly may be used to drive at least one of the shovel and the molding platform so that relative movement can occur between the shovel and the molding platform, so as to peel the 3D printed object from the molding surface by the shovel. For example, the shovel drive assembly may be used to drive the shovel to move, so that the shovel slides on the molding surface of the molding platform, thereby peeling the 3D printed object that has been printed from the molding surface.

[0292] In an optional embodiment of the present disclosure, the separation device may include an ejection mechanism, the ejection mechanism includes a substrate and an ejection element, the ejection element is arranged on the substrate, a through hole is arranged on the molding platform, and the ejection element corresponds to the hole; the ejection drive assembly is arranged to drive the molding platform and the separation device to move from the first position to the second position along the first direction, and to drive the molding platform to move from the second position to the third position along the first direction, wherein at the second position, the substrate of the separation device contacts the limiting device, and during the movement of the molding platform from the second position to the third position, the molding platform moves relative to the substrate, so that the ejection element gradually extends out of the hole of the molding platform. By arranging the ejection element on the substrate, arranging the through hole on the molding platform, and using the cooperation of the ejection drive assembly and the limiting device to make the ejection element pass through the hole to eject the 3D printed object from the molding platform, the purpose of automatically separating the 3D printed object from the molding platform is achieved, thereby realizing the improvement of the convenience of separation of the 3D printed object and the molding platform in the three-dimensional printing technology.

[0293] like Figure 26 to Figure 29 As shown, in an optional embodiment of the present disclosure, the shovel mechanism includes a mounting frame 130, a shovel blade 132 and a cleaning member 134. The shovel blade 132 is movably arranged on the mounting frame 130, and the shovel blade 132 has an initial position and a forward position relative to the mounting frame 130. The cleaning member 134 is arranged on a side close to the shovel blade 132. When the shovel blade 132 moves out from the initial position, one end of the cleaning member 134 abuts against the surface of the shovel blade 132 and slides along the surface of the shovel blade 132. It should be noted that the positions of the two shovel blades 132 in the figure are the initial position and the forward position, respectively. The two shovel blades 132 in the figure are only for the convenience of illustration. The shovel mechanism in this embodiment includes one shovel blade 132.

[0294] By using the shovel mechanism provided in this embodiment, when the scraper 132 moves from the initial position to the forward position relative to the mounting frame 130, the scraper 132 can peel the printed three-dimensional printed part off the molding platform. When the scraper 132 moves out from the initial position, the upper end of the cleaning member 134 abuts against the surface of the scraper 132 and slides along the surface of the scraper 132, and the cleaning member 134 can be used to clean the resin remaining on the scraper 132, so that the resin on the scraper 132 will not remain on the scraper 132 for a long time, thereby improving the effect of the shovel. In addition, by providing the cleaning member 134, the work of manually cleaning the scraper 132 can be omitted, which can improve work efficiency.

[0295] In this embodiment, since the cleaning member 134 is made of a flexible material, when the upper end of the cleaning member 134 abuts against the surface of the scraper 132 and slides along the surface of the scraper 132, the cleaning member 134 undergoes elastic deformation, so that one end of the cleaning member 134 always abuts against the surface of the scraper 132, thereby improving the cleaning effect of the cleaning member 134 on the scraper 132. When the scraper 132 moves to separate from the cleaning member 134, the cleaning member 134 returns to a non-deformed state.

[0296] It should be noted that the cleaning member 134 is made of a flexible material, and the "flexible material" here means that the cleaning member 134 can be elastically deformed. In this embodiment, the cleaning member 134 is made of a rubber material, which has the advantages of low cost and long service life. When the scraper 132 moves from the initial position to the forward position, the scraper 132 contacts the cleaning member 134, and the scraper 132 pushes the upright cleaning member 134 forward, so that the cleaning member 134 is elastically deformed, so that the cleaning member 134 can be used to clean the resin, until the scraper 132 completely passes over the cleaning member 134, and the cleaning member 134 returns to the initial upright state. When the scraper 132 retreats from the forward position to the initial position, the rear side of the scraper 132 contacts the cleaning member 134 so that the cleaning member 134 is pressed down. When the scraper 132 retreats to the initial position, it completely passes over the cleaning member 134, and the cleaning member 134 returns to the initial upright state, preparing for the next scraping.

[0297] It should be noted that, in this embodiment, the blade 132 is movably disposed on the mounting frame 130 in the transverse direction. In one embodiment, a blade guide rail 131 is disposed on the mounting frame 130, and the shovel mechanism further includes a blade seat 1323, the blade 132 is disposed at one end of the blade seat 1323, and the blade seat 1323 is slidably disposed on the blade guide rail 131 in the transverse direction to enable the blade 132 to move relative to the mounting frame 130.

[0298] Specifically, the blade 132 is provided with a blade 132 driving assembly, which includes a power module, a transmission module, a blade guide rail 131 and a blade seat 1323. The blade 132 is mounted on the blade seat 1323, and the blade seat 1323 is slidably connected to the blade guide rail 131. The blade 132 driving assembly is transmission-connected to the blade seat 1323 and is used to drive the blade seat 1323 to drive the blade 132 to move along the blade guide rail 131. Exemplarily, the blade 132 driving assembly includes two blade guide rails 131 and two blade seats 1323, the two blade seats 1323 are arranged in parallel and spaced apart, the two blade seats are respectively slidably connected to the two blade guide rails 131, and the two ends of the blade 132 are respectively mounted on the two blade seats 1323. Among them, the power module can be a driving component such as a motor, and the transmission module includes mechanisms such as a crawler, a synchronous belt, and a conveyor belt.

[0299] In this embodiment, when the scraper 132 is in the initial position, one end of the cleaning member 134 protrudes or is flush with the surface of the scraper 132. Since the scraper 132 itself is very sharp, by making one end of the cleaning member 134 protrude or be flush with the surface of the scraper 132, when the scraper 132 is in the initial position, the cleaning member 134 can be used to shield the scraper 132. Specifically, when the printer is not working, the cleaning member 134 can shield the scraper 132 to prevent the operator from accidentally touching the scraper 132 and causing personal injury.

[0300] Among them, when the scraper 132 is in the initial position, one end of the cleaning member 134 is tilted toward the direction close to the scraper 132. When the scraper 132 moves from the initial position to the forward position, the cleaning effect can be improved, and when the scraper 132 is retracted, some resistance is reduced to facilitate the retraction of the scraper 132.

[0301] In this embodiment, the scraper 132 has a blade 1321. When the scraper 132 is in the initial position, the blade 1321 abuts against the side wall of the cleaning member 134. When the scraper 132 is in a stationary state at the initial position, the cleaning member 134 can also play a certain limiting role, and the scraper 132 is not easy to slide. One side surface of the scraper 132 has an inclined surface 1322, and the inclined surface 1322 extends to the end of the scraper 132. When the scraper 132 moves out of the initial position, one end of the cleaning member 134 abuts against the inclined surface 1322 and slides along the inclined surface 1322. The resin on the scraper 132 is mainly concentrated on the inclined surface 1322 of the scraper 132, so that one end of the cleaning member 134 slides along the inclined surface 1322, which is convenient for using the cleaning member 134 to clean the residual resin.

[0302] Specifically, the scraper 132 has a first surface and a second surface disposed opposite to each other, and an inclined surface 1322 connecting the first surface and the second surface. The angle between the inclined surface 1322 and the first surface is an acute angle, and the inclined surface 1322 area forms a blade 1321 of the scraper 132. The blade 1321 is used to contact the molding surface when the scraper 132 slides on the molding surface of the molding platform. The first surface is used to face the molding surface when the scraper 132 slides on the molding surface, and the second surface is used to face away from the molding surface when the scraper 132 slides on the molding surface. Among them, the scraper 132 includes two end portions disposed along the length direction, and the blade 1321 of the scraper 132 is disposed between the two end portions.

[0303] In this embodiment, the scraper 132 is tilted upward in the direction from the initial position to the forward position (the direction in which the scraper 132 moves out of the initial position). When the scraper 132 moves forward from the initial position, the scraper 132 is not easy to scratch the cleaning member 134 because the scraper 132 is tilted upward.

[0304] The thickness of the cleaning member 134 is between 2 mm and 6 mm. When the thickness of the cleaning member 134 is set within the above range, the cleaning member 134 has sufficient elasticity to facilitate cleaning of the residual resin, and the cleaning member 134 is not too thick, so that the cleaning member 134 can be easily restored to the initial upright state after being separated from the scraper 132. Specifically, the thickness of the cleaning member 134 can be 2 mm, 4 mm, 6 mm, and any other value between 2 mm and 6 mm.

[0305] In this embodiment, the shovel mechanism further includes a liquid receiving member 133, which is disposed on the mounting frame 130. When the shovel blade 132 is located at the initial position, the shovel blade 132 is located above the liquid receiving member 133. Since the shovel blade 132 is located above the liquid receiving member 133 when the shovel blade 132 is located at the initial position, the liquid receiving member 133 can be used to receive the resin dripping from the shovel blade 132. In this embodiment, the liquid receiving member 133 includes a liquid receiving groove, the opening of which faces upward, which has the advantage of a simple structure and is convenient for receiving liquid.

[0306] In order to facilitate understanding of the shovel mechanism provided in this embodiment, the following is explained in conjunction with the accompanying drawings and the use process:

[0307] like Fig.28 As shown, in front of the initial position of the scraper 132, because the scraper 132 has an upward tilt angle, the resin on the scraper 132 is mainly concentrated on the inclined surface 1322 on the lower side of the scraper 132. When the scraper 132 moves from the initial position to the forward position, the scraper 132 contacts the cleaning member 134. Because the scraper 132 is installed at an inclined angle, it will not scratch the cleaning member 134, and will push the elastic cleaning member 134 forward, and then the cleaning member 134 moves along the inclined surface 1322 on the lower side of the scraper 132 to scrape off the residual resin on it. The scraped resin will fall into the liquid contact member 133, and the scraper 132 continues to move forward, and the cleaning member 134 continues to be pressed down until the scraper 132 completely passes over the cleaning member 134, and the cleaning member 134 returns to its initial upright state.

[0308] like Fig.29 As shown, when the scraper 132 retreats from the forward position to the initial position, the rear side of the scraper 132 contacts the cleaning member 134. When the scraper 132 continues to move backward, the cleaning member 134 is pressed down at a larger angle. When the scraper 132 retreats to the initial position, it completely passes over the cleaning member 134, and the cleaning member 134 returns to its initial upright state, preparing for the next scraping.

[0309] It should be noted that the cleaning member 134 provided in this embodiment is not limited to being installed in the upper-mounted shovel member mechanism shown in the drawings, but can also be installed in other shovel member mechanisms. For example, the shovel blade 132 in the patent CN114734639B can also be adapted to install the cleaning member 134.

[0310] The shovel mechanism provided by the embodiment has the following beneficial effects: (1) the cleaning member 134 is used to clean the resin remaining on the scraper 132, so that the resin on the scraper 132 will not remain on the scraper 132 for a long time, thereby improving the effect of the shovel; (2) when the printer is not working, the cleaning member 134 can shield the scraper 132 to prevent the operator from accidentally touching the scraper 132 and causing personal injury; (3) one end of the cleaning member 134 is inclined in the direction close to the scraper 132, and the cleaning member 134 is inclined in the direction close to the scraper 132. When the scraper 132 moves from the initial position to the forward position, the cleaning effect can be improved, and when the scraper 132 retracts, some resistance is reduced to facilitate the retraction of the scraper 132; (4) when the scraper 132 is in a stationary state at the initial position, the scraper 132 abuts against the side wall of the cleaning member 134, and the cleaning member 134 can also play a certain limiting role, and the scraper 132 is not easy to slide; (5) when the scraper 132 moves forward from the initial position, since the scraper 132 is tilted upward, the scraper 132 is not easy to scratch the cleaning member 134.

[0311] like Figure 30 to Figure 35 As shown, in an optional embodiment of the present disclosure, the shovel mechanism includes a liquid receiving member 133, which is arranged on the mounting frame 130. The liquid receiving member 133 has a liquid receiving port, and the liquid receiving port corresponds to at least one position of the scraper 132, so that the liquid receiving member 133 receives the printing material adhered to the scraper 132. In this way, under the action of gravity, the uncured liquid printing material drips downward, and the setting of the liquid receiving member 133 can catch the uncured liquid printing material attached to the 3D printed object when the scraper 132 is shoveled, reducing the possibility of the uncured liquid printing material attached to the scraper 132 dripping onto the equipment and causing pollution to the equipment. Therefore, the technical solution of the present disclosure effectively solves the problem in the related art that the liquid printing material attached to the scraper 132 is easy to drip onto the equipment and cause pollution to the equipment.

[0312] In this embodiment, the liquid receiving member 133 is disposed below the initial position of the scraper 132, so that the liquid receiving member 133 can receive the uncured liquid printing material on the scraper 132 when the scraper 132 is stationary. When the scraper 132 is in the initial position, it is stationary on one side of the molding surface to avoid the printing of the 3D printed object.

[0313] The mounting frame 130 includes: a first bracket 137, a movable bracket 1373, a scraper 132 and a scraper drive assembly 1381. The first bracket 137 is arranged on the 3D printing device. The movable bracket 1373 is movably arranged on the first bracket 137. The scraper 132 is connected to the movable bracket 1373 and can move with the movable bracket 1373. The scraper drive assembly 1381 is arranged on the first bracket 137, and the scraper drive assembly 1381 drives the movable bracket 1373 to drive the scraper 132 to move relative to the molding surface to separate the 3D printed object from the molding surface. In this way, the arrangement of the first bracket 137 facilitates the installation and processing of the movable bracket 1373, the scraper 132 and the scraper drive assembly 1381.

[0314] Since the scraper 132 is suspended on the first bracket 137 by the movable bracket 1373, the space below the scraper 132 is avoided from being occupied when the scraper 132 moves, so that the space below the scraper 132 when the 3D printing device moves is convenient for setting a docking structure with other external devices, such as a docking structure between the 3D printing device and subsequent draining, cleaning and curing equipment. The movable bracket 1373 drives the scraper 132 to move relative to the molding surface, so that the 3D printed object can be separated from the molding surface, thereby improving the scraping efficiency. In addition, since the moving trajectory of the scraper 132 remains unchanged, the moving trajectory of the scraper 132 relative to the molding surface remains unchanged, thereby improving the consistency of the 3D printed object separated from the molding surface and improving the stability of the finished product. In other embodiments, the scraper drive assembly 1381 drives the molding platform to move, and the scraper 132 is stationary, so that the molding platform and the scraper 132 move relative to each other to separate the 3D printed object from the molding surface.

[0315] The mounting frame 130 further includes a fixing bracket 1390 disposed on the first bracket 137, and the liquid contact part 133 is connected to the fixing bracket 1390. The setting of the fixing bracket 1390 facilitates the fixing of the liquid contact part 133. In addition, since the fixing bracket 1390 is hoisted on the first bracket 137, the space below the liquid contact part 133 is avoided from being occupied, and it is convenient for the space below the 3D printing device to be arranged to connect with other external devices when the scraper 132 moves.

[0316] In this embodiment, the scraper 132 includes two ends arranged along the length direction, and the blade 1321 of the scraper 132 is arranged between the two ends; the scraper mechanism also includes a liquid blocking member, which is arranged on the scraper 132 and is used to block the printing material on the scraper 132 from flowing toward the two ends. The liquid blocking member can block the uncured printing material from flowing to the two ends of the scraper 132, so as to reduce the possibility of the uncured printing material dripping along the two ends of the scraper 132.

[0317] Among them, there are two fixed brackets 1390 arranged at intervals on both sides of the liquid contact part 133, and one fixed bracket 1390 is provided with a connecting protrusion 1391 facing the other fixed bracket 1390. A connecting flange 1331 is provided on one end of the liquid contact part 133, and the connecting flange 1331 overlaps the connecting protrusion 1391 to connect the liquid contact part 133 with the fixed bracket 1390. The structure of the connecting protrusion 1391 and the connecting flange 1331 is simple and easy to process. In addition, the overlapping cooperation of the connecting protrusion 1391 and the connecting flange 1331 facilitates the replacement and installation of the liquid contact part 133. In this embodiment, the liquid contact part 133 is detachably connected to the fixed bracket 1390 to facilitate the cleaning of the uncured printing material received in the liquid contact part 133.

[0318] Among them, a positioning structure is provided between the connecting protrusion 1391 and the connecting flange 1331, and the positioning structure includes a positioning protrusion 1392 and a positioning hole 1393 that is positioned and matched with the positioning protrusion 1392. The positioning protrusion 1392 is provided on the connecting protrusion 1391, and the positioning hole 1393 is provided on the connecting flange 1331. The provision of the positioning structure facilitates the positioning of the connecting flange 1331 when it overlaps the connecting protrusion 1391, so that the installation of the liquid contact part 133 on the fixed bracket 1390 is more stable and reliable. In addition, the structure of the positioning protrusion 1392 and the positioning hole 1393 is simple and easy to process. In other embodiments, the positioning hole 1393 is provided on the connecting protrusion 1391, and the positioning protrusion 1392 is provided on the connecting flange 1331.

[0319] Among them, one end of the connecting flange 1331 is provided with a limit flange 1332 folded downward, and the limit flange 1332 is limitedly matched with the connecting protrusion 1391. The setting of the limit flange 1332 can limit the movement of the connecting flange 1331 relative to the connecting protrusion 1391, so that the installation of the liquid contact part 133 on the fixed bracket 1390 is more stable and reliable. The limit flange 1332 has a simple structure and is easy to process. In this embodiment, the limit flange 1332 is located on the side of the connecting protrusion 1391 away from the molding surface.

[0320] Among them, a magnetic member is provided on the side of the limiting flange 1332 facing the connecting protrusion 1391, and the connecting protrusion 1391 can cooperate with the magnetic member by magnetic attraction. The provision of the magnetic member facilitates the fixation of the liquid contact part 133 on the fixing bracket 1390, making the installation of the liquid contact part 133 more convenient and the fixation more reliable. In this embodiment, the liquid contact part 133 is provided on the upper side of the mounting frame 130 by magnetic attraction and buckle, which can realize the pull-out type taking and placing, and is convenient for cleaning the accumulated liquid.

[0321] The shovel mechanism further includes a receiving member 141 and a receiving member driving assembly. The receiving member 141 is movably arranged on the first bracket 137. The receiving member 141 has a receiving position located below the molding surface and a discharging position located on one side of the molding surface. The receiving member driving assembly drives the receiving member 141 to move between the receiving position and the discharging position. The receiving member 141 can receive the 3D printed object shoveled off by the scraper 132 and move the 3D printed object to the discharging position, further improving the shovel efficiency.

[0322] The mounting frame 130 further includes a second bracket 135, and the shovel mechanism further includes a liquid receiving track 37 disposed on the second bracket 135. When the receiving member 141 is at the material discharging position, the box opening of the receiving member 141 is located above the liquid receiving track 37. The provision of the liquid receiving track 37 can guide the uncured printing material on the 3D printed object flowing out of the box opening of the receiving member 141, further reducing the possibility of uncured printing material dripping onto or outside the device, causing pollution to the device or the environment.

[0323] It should be noted that the first bracket 137 and the second bracket 135 can be an integrally formed structure, or the first bracket 137 and the second bracket 135 are two independent components. In this embodiment, the mounting frame 130 also includes the second bracket 135, and the liquid receiving track 37 can guide the uncured printing material to the recycling container, so that the uncured printing material can be recycled, and the recycled uncured printing material can be filtered and reused, or mixed with new printing material in proportion and used. The printing material is resin.

[0324] In this embodiment, when the receiving member 141 is at the material discharging position, a receiving member is provided below the box opening of the receiving member 141, and the 3D printed object in the receiving member 141 can fall into the receiving member for material collection. A full material sensor is provided at the box opening of the receiving member to detect whether the receiving member is full.

[0325] In this embodiment, a paddle that can move in a direction close to the box opening of the receiving member 141 or away from the box opening of the receiving member 141 is provided in the receiving member 141. The paddle moves to push the 3D printed object in the receiving member 141 out of the box opening so that the 3D printed object can fall into the material receiving member.

[0326] Among them, the second bracket 135 includes a platform base plate 136 located below the molding surface. The first bracket 137 includes a top plate 1371 and a support beam 1372 supporting the top plate 1371, and the support beam 1372 is connected to the platform base plate 136. The top plate 1371 is arranged parallel to the molding surface, and the movable bracket 1373 is arranged below the top plate 1371. In this way, the top plate 1371 connected to the movable bracket 1373 is arranged parallel to the molding surface, so that the moving plane of the scraper 132 is parallel to the molding surface, which better ensures the parallelism of the scraper 132 and the molding platform, and facilitates the control of the gap between the scraper 132 and the molding platform, so as to reduce the residue of the 3D printed object on the molding plane after the scraper. In addition, such a setting can improve the consistency of the separated 3D printed objects and further improve the stability of the finished product.

[0327] In this embodiment, a material tray for holding printing materials is provided on the platform substrate 136, and the molding surface is located above the material tray. The 3D printed object is molded on the lower surface of the molding surface. In the vertical projection, the projection of the molding surface is located within the projection of the material tray.

[0328] like Figure 30 to Figure 35 As shown, the shovel drive assembly 1381 is connected to the bottom of the platform base plate 136, and the shovel drive assembly 1381 includes the shovel drive assembly 1381, a transmission shaft 1382 spaced apart from the motor shaft of the shovel drive assembly 1381, a first transmission belt 1383 drivingly connecting the motor shaft and the transmission shaft 1382, a first pulley 1384 disposed at one end of the transmission shaft 1382, a second pulley 1385 disposed on the top plate 1371, and a second transmission belt 1386 sleeved on the first pulley 1384 and the second pulley 1385. The shovel drive assembly 1381 drives the transmission shaft 1382 to rotate through the first transmission belt 1383, so as to drive the shovel blade 132 on the movable bracket 1373 to move through the second transmission belt 1386. In this way, the structure of the shovel drive assembly 1381 is compact, the space occupied by the shovel drive assembly 1381 is reduced, and the processing is convenient, so that the movement of the shovel blade 132 is more stable and reliable.

[0329] In this embodiment, the shovel drive assembly 1381 further includes a speed reducer disposed between the shovel drive assembly 1381 and the transmission shaft 1382. The second transmission belt 1386 is connected to the movable bracket 1373 by screws. A slide rail is disposed on the top plate 1371, and one end of the movable bracket 1373 is slidably disposed in the slide rail. In this embodiment, there are two first pulleys 1384 and two second pulleys 1385, two second transmission belts 1386, and one transmission shaft 1382, and the transmission shaft 1382 drives the two first pulleys 1384 to rotate synchronously. One second transmission belt 1386 is sleeved on one first pulley 1384 and one second pulley 1385.

[0330] like Figure 30 to Figure 35 As shown, the shovel mechanism also includes a first position detection member arranged on the liquid contact member 133, a second position detection member arranged on the side of the molding surface away from the liquid contact member 133, and a controller connected to the first position detection member and the second position detection member by signal, and the controller is controlled and connected to the shovel drive assembly 1381. In this way, by setting the first position detection member, the second position detection member and the controller, the scraper 132 can be restricted between the liquid contact member 133 and the side of the molding surface away from the liquid contact member 133, and the moving range of the scraper 132 is limited to improve the accuracy of the scraper 132 when moving, and further improve the shoveling efficiency. In this embodiment, the shovel mechanism also includes a detection module, which is used to detect the number of shoveling times of the scraper 132. For example, an NFC detection module is provided on the scraper 132 to record the number of shoveling times.

[0331] Please refer to Fig.36 In this embodiment, when the 3D printed object is printed, the receiving member 141 is located at the material discharging position on one side of the molding surface, and the scraper 132 is in the initial state above the liquid receiving port of the liquid receiving member 133, so as to avoid the printing operation of the 3D printed object. After the 3D printed object is printed, the receiving member 141 moves to the material receiving position, and the scraper 132 is in a separated state relative to the molding surface, so that the 3D printed object can be separated from the molding surface by the scraper 132 and fall into the receiving member 141.

[0332] In an optional embodiment of the present disclosure, the system for three-dimensional printing further includes a blanking assembly 14, which is configured to allow movement between a first position and a second position. In the first position, the blanking assembly 14 is used to receive the 3D printed object 8 separated from the molding surface of the molding platform 11, and in the second position, the blanking assembly transfers the 3D printed object 8 to the receiving body 31. The blanking assembly 14 can be integrated into the 3D printing device, or can be provided separately, or can be integrated with the post-processing device.

[0333] In some optional embodiments, the material unloading component 14 has a receiving position that moves to the top of the material tray 12 to transfer the 3D printed object 8. The material unloading component 14 includes a material unloading drive component and a receiving member 141. The material unloading drive component is used to drive the receiving member 141 to move between the receiving position and the discharging position, so as to cooperate with the shoveling mechanism to automatically shovel and transfer the 3D printed object attached to the molding platform 11, thereby realizing the unattended full-automatic shoveling and receiving of the printer. In this embodiment, the receiving member 141 has a receiving space for accommodating 3D printed objects, so that it can be basket-shaped or box-shaped, and a discharging port connected to the receiving space is provided on one side of the receiving member 141, and the discharging port can be used for the 3D printed object to be removed from the receiving member 141. Of course, in other optional embodiments of the present disclosure, the receiving member 141 can have different structural forms, such as a plate-shaped, as long as it can play the role of receiving 3D printed objects.

[0334] Furthermore, the material unloading assembly 14 may also include a material unloading member 1441, which can be used to unload the 3D printed object in the receiving member 141 to the receiving body 31, thereby releasing the receiving space so that the receiving member 141 can continue to carry other 3D printed objects. The material unloading member 1441 may include a material unloading portion, which is used to unload the 3D printed object in the receiving space during the unloading stage to unload it outside the material outlet.

[0335] Furthermore, a drainage portion 1421 is provided at the bottom of the receiving member 141. By providing the drainage portion 1421 at the bottom of the receiving member 141, the printing material can be directly discharged from the receiving member 141 through the drainage portion 1421 during the receiving process of the receiving member 141, so as to be recycled. This can alleviate the problem of the printing material attached to the 3D printed object being wasted along with the 3D printed object.

[0336] Please refer to Fig.36The 3D printer provided in this embodiment includes a molding platform (not shown in the figure), a material tray 12 and a material discharge assembly 14. The molding platform 11 is arranged above the material tray 12 at intervals. The material tray 12 is used to accommodate printing materials, and the molding platform 11 is used to attach 3D printed objects. The lower surface of the molding platform 11 is a molding surface, the molding surface faces the material tray 12, and the molding surface is used to attach 3D printed objects. Further, the 3D printer also includes an optical machine system (not shown in the figure) and a material discharge drive mechanism (not shown in the figure). The optical machine system can irradiate the printing material in the material tray 12 so that the printing material is cured under light to form a solid printing layer. The height position of the pattern projected by the optical machine system does not change basically, so the position where the printing material is cured and formed basically remains unchanged. The drive mechanism is used to drive the molding platform 11 to move up and down. When a layer of printing layer is cured and formed, the printing layer that has been cured and formed is moved up by moving the molding platform 11 upward, so that the next layer can be printed, and the 3D printed object is formed by printing layer by layer. In this embodiment, the optical machine system is located below the material tray 12, and the bottom of the material tray 12 is transparent for light to pass through.

[0337] After printing, the 3D printed object is attached upside down to the molding surface of the molding platform 11. Optionally, the 3D printer further includes a scraper 132 component (not shown in the figure), which can peel the 3D printed object from the molding platform 11 after the 3D printed object is printed, so that the 3D printed object can fall onto the unloading component 14 and then be transported away from under the molding platform 11. In other optional embodiments, the 3D printer may not include the scraper 132 component, and the 3D printed object can be peeled off from the molding platform 11 manually.

[0338] In the disclosed embodiment, the unloading assembly 14 includes a receiving member 141 and a driving assembly (not shown in the figure). The receiving member 141 has a material receiving position and a material unloading position, and the receiving member 141 is used to receive the 3D printed object peeled off from the molding platform 11 of the 3D printer at the material receiving position. In the present embodiment, the material receiving position of the receiving member 141 is located between the material tray 12 and the molding platform 11. When the receiving member 141 is in the unloading position, at least most of the receiving member 141 is moved out from between the molding platform 11 and the material tray 12. In the present embodiment, the unloading position is the position where the 3D printed object is unloaded from the receiving member 141, and the specific method of unloading the 3D printed object includes manually taking out the 3D printed object from the receiving member 141, or taking out the 3D printed object from the receiving member 141 using an automated mechanical structure. The driving assembly is used to drive the receiving member 141 to move between the material receiving position and the material unloading position.

[0339] Further, in an optional embodiment, the material receiving position and the material unloading position are spaced apart in the horizontal direction. The driving assembly is configured to drive the receiving member 141 from the material unloading position to the material receiving position along the material receiving direction (i.e., direction a in the figure), and to drive the receiving member 141 from the material receiving position to the material unloading position along the material feeding direction (i.e., direction b in the figure). In this embodiment, the material receiving direction is opposite to the material feeding direction. In the figure, the receiving member 141 is at the material unloading position.

[0340] In the embodiment of the present disclosure, a drain portion 1421 is provided at the bottom of the receiving member 141. By providing the drain portion 1421, when the receiving member 141 receives the 3D printed object, the uncured printing material attached to the surface of the 3D printed object can be discharged from the receiving member 141 through the drain portion 1421 and collected. Furthermore, the drain portion 1421 has an outlet, which is vertically opposite to at least part of the opening of the material tray 12, so that the printing material on the surface of the 3D printed object received by the receiving member 141 can flow back to the material tray 12, thereby realizing the recycling of this part of the printing material and saving material costs. Since the liquid printing material naturally flows back to the material tray 12 during the connection process, by adopting the unloading component 14 provided in the embodiment of the present disclosure, there is no need to add an additional recycling process to the process flow.

[0341] Specifically in this embodiment, the receiving member 141 is basket-shaped, the drainage portion 1421 includes a through hole, and the drainage portion 1421 is arranged at the bottom of the receiving member 141 . The printing material can flow to the bottom of the receiving member 141 and then flow out from the drainage portion 1421 .

[0342] In other optional embodiments, the drain portion 1421 may also be a combination of a through hole and a conduit, and the conduit may be used to guide the printed material in other directions. In other optional embodiments, a temporary storage container may be specially provided to collect the printed material discharged from the drain portion 1421; the temporary storage container may be connected to the drain portion 1421, or may be arranged at intervals below the drain portion 1421 to receive the printed material flowing out of the drain portion 1421, and the printed material in the temporary storage container may be subsequently returned to the material tray 12 for reuse.

[0343] Further, the discharge portion 1421 is adjacent to the rear end of the bottom of the receiving member 141 in the feeding direction. In other words, the discharge portion 1421 is close to one end of the receiving member 141 facing the direction a. Since the receiving member 141 moves along the feeding direction after receiving the 3D printed object, the position of the discharge portion 1421 will also move. By arranging the discharge portion 1421 near the rear end of the bottom of the receiving member 141 in the feeding direction, the discharge portion 1421 can be kept above the material tray 12 for a long time (even all the time) during the process of the receiving member 141 moving from the material receiving position to the material discharging position, so that the printing material flowing out of the discharge portion 1421 can fall smoothly into the material tray 12. Optionally, when the receiving member 141 is located at any position between the material receiving position and the material discharging position, the discharge portion 1421 is opposite to the opening of the material tray 12 in the vertical direction, so that the printing material flowing out of the discharge portion 1421 can always flow into the material tray 12. In this embodiment, a plurality of through holes are disposed at the bottom of the receiving member 141 , and the plurality of through holes are arranged along a direction perpendicular to the movement direction of the receiving member 141 to form a liquid discharge portion 1421 .

[0344] In other optional embodiments, the position of the discharge portion 1421 can be adjusted, and is not limited to being adjacent to the rear end of the bottom of the receiving member 141 in the feeding direction. For example, the plurality of discharge portions 1421 can be a plurality of through holes distributed on the entire bottom of the receiving member 141; in this case, the receiving member 141 can be controlled to stay for a certain period of time after receiving the 3D printed object, and after the liquid printing material flows into the material tray 12, the receiving member 141 is moved to the unloading position for unloading.

[0345] Fig.37 An exploded view of a blanking assembly 14 in one embodiment of the present disclosure; Fig.38 for Fig.37 The enlarged view of the local IV in the figure. Figure 36 to Figure 38 As shown, in this embodiment, the receiving member 141 includes a bottom plate 142 and a side plate connected to the bottom plate 142, the bottom plate 142 and the side plate enclose a receiving cavity for storing 3D printed objects, a carrier plate 143 is provided above the bottom plate 142, a liquid storage cavity 145 is formed between the bottom plate 142 and the carrier plate 143, a liquid discharge portion 1421 is provided on the bottom plate 142 and adjacent to the rear end of the bottom plate 142 in the feeding direction, and a plurality of liquid through holes 1431 are provided on the carrier plate 143. In this embodiment, the liquid through holes 1431 are circular holes, and the liquid through holes 1431 are distributed in an array on the carrier plate 143. Of course, in some embodiments, the carrier plate 143 may not be provided, the bottom plate 142 may be used to directly receive the 3D printed object, and the liquid printing material may be recovered through the liquid discharge portion 1421.

[0346] It can be understood that, in the case where the carrier plate 143 is not provided, if the discharge portion 1421 is provided at the rear end of the bottom of the receiving member 141 in the feeding direction, when the 3D printed object falls on the bottom of the receiving member 141, it is very likely that it will not fall directly on the discharge portion 1421, so the printing material will first flow from the 3D printed object to the bottom of the receiving member 141, and then flow along the bottom of the receiving member 141 to the discharge portion 1421. This will result in a large amount of printing material still existing around the 3D printed object for a long time; in other words, the speed at which the 3D printed object separates from the liquid printing material is slow, resulting in a large amount of printing material still attached to the lower surface of the 3D printed object after the receiving member 141 reaches the unloading position. This part of the material is easy to leave the receiving member 141 with the 3D printed object, and thus be wasted. In this embodiment, by distributing the liquid through holes 1431 on the carrier plate 143, the 3D printed object can directly fall on the carrier plate 143 with the liquid through holes 1431 distributed thereon, and the printing material will quickly penetrate downward into the liquid storage cavity 145 through the liquid through holes 1431 when flowing onto the carrier plate 143, thereby realizing the rapid separation of the printing material and the 3D printed object. In this way, after the 3D printed object moves to the unloading position with the receiving member 141, less printing material is attached to its lower surface, so the waste of printing material will be relatively reduced. At the same time, the printing material in the liquid storage cavity 145 can further flow from the drainage portion 1421 on the bottom plate 142 to the material tray 12, thereby realizing the recovery of the printing material.

[0347] In an optional embodiment, the shape of the liquid through hole 1431 can be adjusted, such as being set as a strip hole. The carrier plate 143 can be composed of a plurality of ribs arranged in parallel and spaced apart, and a liquid through hole 1431 is formed between two adjacent ribs. The carrier plate 143 of this structure can allow the printing material to pass quickly, thereby realizing the rapid separation of the printing material from the 3D printed object.

[0348] Please refer again Fig.36 and Fig.37 In this embodiment, the side plate of the receiving member 141 includes two first side plates 1433 and a second side plate 1434 which are arranged in parallel and spaced apart. The two first side plates 1433 extend along the material receiving direction and the material feeding direction, and the two first side plates 1433 are respectively arranged at two opposite sides of the bottom plate 142 assembly. The second side plate 1434 is arranged at the rear end of the bottom plate 142 assembly in the material feeding direction, and is perpendicular to the material receiving direction and the material feeding direction. In this embodiment, the two ends of the first side plate 1433 are respectively connected to the two second side plates 1434, so that the first side plate 1433, the second side plate 1434 and the bottom plate 142 assembly together form a accommodating cavity. The accommodating cavity has an upward material receiving opening for receiving a 3D printed object, and has a discharge opening for sending out the 3D printed object at the front end in the material feeding direction.

[0349] Further, in the present embodiment, the unloading assembly 14 further includes a material-dispensing assembly 144, which is used to dispense the 3D printed object in the receiving member 141 from the unloading opening when the receiving member 141 is in the unloading position. In the present embodiment, the material-dispensing assembly 144 includes a material-dispensing member 1441 and a material-dispensing driving member used to drive the material-dispensing member 1441 (not shown in the figure) to move in the material receiving direction (i.e., direction a in the figure) and the material feeding direction (i.e., direction b in the figure). Optionally, when the material-dispensing assembly 144 does not perform the unloading operation, the material-dispensing member 1441 is always located at the rear end of the accommodating chamber in the material feeding direction; when the receiving member 141 is in the unloading position, the material-dispensing assembly 144 performs the unloading operation, and the material-dispensing driving member drives the material-dispensing member 1441 to move along the material feeding direction, thereby dispensing the 3D printed object from the receiving member 141 from the unloading opening, thereby completing the unloading. In other optional embodiments, the unloading component 14 may not include the material removing component 144, but the 3D printed object in the receiving member 141 at the unloading position is taken out manually.

[0350] Fig.39 It is a cross-sectional view of a receiving member 141 in an embodiment of the present disclosure. Optionally, the bottom plate 142 is tilted relative to the horizontal plane, and one end of the bottom plate 142 provided with a drainage portion 1421 is lower than the other end. In this embodiment, the rear end of the bottom plate 142 in the feeding direction is lower than the front end in the feeding direction. With such a configuration, the drainage portion 1421 can be located at a lower position of the entire bottom plate 142, so that the printing material can more easily flow to the drainage portion 1421, and then flow into the material tray 12, thereby improving the recovery efficiency of the printing material. The angle α of the bottom plate 142 relative to the horizontal plane can be 1° to 30°.

[0351] Fig.40 14 is a cross-sectional view of a receiving member 141 in another embodiment of the present disclosure. Optionally, the bottom plate 142 has a first slope 1422 and a second slope 1423 facing the carrier plate 143, the first slope 1422 and the second slope 1423 are sequentially connected in the material receiving direction, the end of the first slope 1422 close to the second slope 1423 is lower than the end away from the second slope 1423, the end of the second slope 1423 close to the first slope 1422 is lower than the end away from the first slope 1422, and the drainage portion 1421 is arranged at the intersection of the first slope 1422 and the second slope 1423. Similar to the principle of the embodiment in the figure, in this embodiment, the liquid discharge portion 1421 is arranged at the intersection of the first slope 1422 and the second slope 1423, so that the liquid discharge portion 1421 is at the lowest point of the entire bottom plate 142, so that the printing materials at all positions on the bottom plate 142 will flow to the liquid discharge portion 1421 and will not be stored for a long time in the liquid storage cavity 145. Further, the optional range of the angle β between the first slope 1422 and the horizontal plane and the angle θ between the second slope 1423 and the horizontal plane is 1° to 30°.

[0352] In other optional embodiments, the entire bottom plate 142 may also be configured to be funnel-shaped, with the drainage portion 1421 being disposed at the lowest point.

[0353] Please refer again Figure 36 to Figure 38 In this embodiment, the receiving member 141 further includes a filter assembly 146 disposed at the liquid leakage port. Since the printing material may contain solidified resin particles or solid particles that fall into the printing material from the environment, the filter assembly 146 can filter out these particles to prevent the particles from entering the material tray 12 and affecting the printing operation.

[0354] In this embodiment, the filter assembly 146 includes a filter screen 1461 and a clamping plate 1462. The clamping plate 1462 is detachably connected to the bottom plate 142 assembly. The filter screen 1461 is clamped between the clamping plate 1462 and the bottom plate 142 assembly and covers the liquid discharge portion 1421. The clamping plate 1462 is provided with an avoidance hole 147 corresponding to the position of the liquid discharge portion 1421. Specifically, the clamping plate 1462 can be fixed to the outer surface of the bottom plate 142 by fasteners such as screws, and the filter screen 1461 is clamped and fixed between the bottom plate 142 and the clamping plate 1462. In other optional embodiments, the filter assembly 146 can also be fixed by welding; the filter assembly 146 can also be arranged on the inner side of the bottom plate 142, that is, located in the liquid storage cavity 145.

[0355] The unloading assembly 14 provided in the embodiment of the present disclosure includes a receiving member 141 and a driving assembly. The receiving member 141 has a material receiving position. The receiving member 141 is used to receive the 3D printed object separated from the molding platform 11 of the 3D printer at the material receiving position; a liquid discharge portion 1421 is provided at the bottom of the receiving member 141. After the 3D printer completes printing, the 3D printed object attached to the molding platform 11 is separated. When the receiving member 141 is at the material receiving position, the 3D printed object separated from the molding platform 11 can be received. After the receiving member 141 receives the 3D printed object at the material receiving position, the liquid printing material attached to the surface of the 3D printed object will be discharged through the liquid discharge portion 1421 and collected again (by the material tray 12 or other container), thereby realizing the recycling and reuse of the printing material, thereby avoiding the printing material being wasted when it is sent away with the 3D printed object.

[0356] like Fig.41As shown, in an optional embodiment of the present disclosure, a system for three-dimensional printing also includes a 3D printing device, and the 3D printing device includes: a first controller, which is used to receive a plurality of classified target three-dimensional models sent by the cloud, and user case information corresponding to the plurality of target three-dimensional models; a printing mechanism, which is used to perform three-dimensional printing based on the plurality of target three-dimensional models to form a plurality of 3D printed objects; a pickup device, which is used to pick up the plurality of 3D printed objects based on a preset pickup strategy after each edition is printed; wherein the pickup strategy includes setting the 3D printed objects belonging to the same user case in one or more storage pieces. By setting the three-dimensional models of the same user case in one or more storage pieces, the purpose of centrally printing and picking up the three-dimensional models of the same user case is achieved, the efficiency of sorting after printing is improved, the efficiency of scheduling the production of the three-dimensional model is greatly improved, and the processing time is reduced; the technical effect of improving the printing efficiency of the three-dimensional model is achieved, thereby solving the technical problem in the related art that the sorting during 3D printing production is time-consuming and labor-intensive, resulting in low 3D printing production efficiency.

[0357] like Fig.42 As shown, it is a schematic diagram of the structure of an optional 3D printing device provided according to an embodiment of the present disclosure. The 3D printing device 100 includes a printing mechanism and a pick-up device 200; the printing mechanism includes a molding platform and a material tray, the material tray is used to hold printing materials; the molding platform has a molding surface, which is used to adhere the printing materials to the molding surface layer by layer to obtain a printed part (i.e., a three-dimensional model); the pick-up device includes a separation device, a material discharge component and a material receiving component, the separation device is used to separate the 3D printed object from the molding surface, and the material discharge component is used to transfer the 3D printed object separated from the molding surface to a storage part; the material discharge component has a first position that moves to the top of the material tray and a second position that moves to the top of the storage part to transfer the 3D printed object to the storage part. The material receiving component is used to set the printed part in the storage part, for example, to pack the three-dimensional models belonging to the same user case in one or more storage boxes or storage bags.

[0358] Exemplarily, after each version is printed, the 3D printing device performs a pick-up process on multiple 3D printed objects based on a preset pick-up strategy; wherein the pick-up strategy includes placing the three-dimensional models belonging to the same user case in one or more storage pieces. It is understandable that the capacity of a storage piece is limited, and when the number of three-dimensional models belonging to the same user case can be placed in one storage piece, the three-dimensional models of the same user can be packaged in one storage piece; when the number of three-dimensional models belonging to the same user case is large, they can also be placed in multiple storage pieces.

[0359] In an optional embodiment, a plurality of 3D printed objects are picked up based on a preset picking strategy, including: when there are 3D printed objects corresponding to more than two user cases in the same production sequence, the 3D printing device picks up the objects in sequence based on the layout information of the more than two user cases to distinguish the 3D printed objects corresponding to different user cases.

[0360] It is understandable that after the 3D printing device completes printing of one version, if the version has only one 3D printed object of a user case, the material is directly taken out and collected; if the version has multiple user cases, the user cases are distinguished and the materials are taken out and collected separately.

[0361] Optionally, picking up objects in sequence based on the layout of user cases includes: the 3D printing device controls the motion parameters of a picking device of the 3D printing device according to the layout information, and after completing the picking up of the 3D printed object of one user case, the 3D printed object of the next user case is picked up, so as to realize the picking up of the 3D printed objects in the printing area in sequence.

[0362] For example, for the case where there are multiple user cases in the same version, such as Figure 6 As shown in c, the 3D models of different users are arranged in different areas in the layout. Figure 6 A, B, and C in c are the identifiers of different users, respectively. The material can be unloaded along the length direction, width direction, or a certain direction, and then unloaded along the partition direction by the material-retrieving device. There can be multiple unloading methods to perform unloading processing. For example, when the unloading component is a shovel component, the moving distance of the shovel can be controlled according to the layout information during the unloading process. After the 3D model of user A is shoveled, the shovel stops, and the receiving component is controlled to collect and pack the model of user A, and then the 3D model of user B is shoveled and collected and packed, and so on to complete the unloading process of all users' 3D models in this version.

[0363] In other embodiments, the piece-pushing component can also be used to realize automatic picking up. The push rod in the piece-pushing component can be configured in different areas. The push rod corresponding to the user A area can be controlled to be pressed down according to the layout information to push down the three-dimensional model of the user A area. Then the material receiving component can be controlled to receive and package the model of user A, and then the three-dimensional model of user B can be picked up. This process can be repeated and the picking up process of the three-dimensional models of all users in the edition can be completed.

[0364] In other embodiments, a laser cutting component can be used to automatically pick up items. According to the layout information, the laser is controlled to first pick up the 3D model of user A's area. After the 3D model of user A's area is cut, the material receiving component is controlled to package the 3D model of user A. Then, the 3D model of user B's area is picked up, and so on to complete the process of picking up the 3D models of all users in the edition.

[0365] In an optional embodiment of the present disclosure, the retrieval device 200 includes a material receiving component, which includes one or more storage components, and the storage components are used to store 3D printed objects; wherein the material receiving component stores 3D printed objects belonging to the same user case in one or more storage components. Through the above-mentioned setting, 3D printed objects of the same user case can be stored together, and classification can be effectively achieved, so that 3D printed objects belonging to different user cases can be avoided from being stored together, thereby avoiding the need for subsequent sorting operations, thereby effectively improving the efficiency of production. Therefore, the system for three-dimensional printing can effectively solve the problem in the related art that sorting during 3D printing production is time-consuming and labor-intensive, resulting in low 3D printing production efficiency.

[0366] In one embodiment, the receiving assembly 20 includes a conveying mechanism 22, which is used to drive the receiving member 21 to move to the receiving position. When the receiving member 21 is at the receiving position, the 3D printed object enters the receiving member 21 from the mouth of the receiving member 21. In this way, the 3D printed object can be stored. Specifically, the conveying mechanism 22 drives the receiving member 21 to move to the receiving position, which makes the storage process simpler.

[0367] In one embodiment, the 3D printing device includes a separation device and a material discharge assembly. The separation device is used to separate the 3D printed object from the molding surface of the 3D printing device. The specific implementation of the separation device refers to the scheme described above and will not be repeated here. The material discharge assembly is used to transfer the 3D printed object separated from the molding surface to the storage member 21; the material discharge assembly has a material receiving position that moves to the top of the material tray and a material discharge position that moves to the top of the storage member to transfer the 3D printed object to the storage member 21.

[0368] In one embodiment, the system for three-dimensional printing further includes a blanking component 14, which is configured to allow movement between a first position and a second position. In the first position, the blanking component 13 is used to receive the 3D printed object 8 separated from the molding surface. In the second position, the blanking component 14 transfers the 3D printed object 8 to the receiving body 31, and the driving mechanism can rotate the receiving body 31 to move the 3D printed object 8 out of the receiving body 31 and enter the receiving part 21 through the opening of the receiving part 21; or,

[0369] The material receiving body 31 is configured to allow movement between a first position and a second position. The material receiving body 31 is configured to receive the 3D printed object 8 with excess printing material separated from the molding surface in the first position, and to allow the material receiving body 31 to rotate from the first state to the second state in the second position; the driving mechanism can rotate the material receiving body 31 so that the 3D printed object 8 is moved out of the material receiving body 31 and enters the storage member 21 through the opening of the storage member 21.

[0370] like Figure 43 to Figure 47 As shown, in one embodiment, the receiving assembly 20 further includes an opening mechanism 23, which is disposed at the end of the conveying mechanism 22 and is used to drive the mouth of the receiving member 21 to switch between an open state and a closed state. The setting of the opening mechanism 23 can drive the receiving member 21 to switch between an open state and a closed state, and can adjust the receiving member 21.

[0371] like Figure 43 to Figure 47 As shown, in one embodiment, the opening mechanism 23 includes a first unit for driving the first end of the storage member 21 and a second unit for driving the opposite second end of the storage member 21, and the first end of the storage member 21 and the second end of the storage member 21 can move relative to each other so that the mouth of the storage member 21 switches between an open state and a closed state. The first unit and the second unit can control the mouth of the storage member, thereby switching the mouth of the storage member between an open state and a closed state.

[0372] like Figure 43 to Figure 47 As shown, in one embodiment, the first unit includes a fixing mechanism 231, and the second unit includes a moving mechanism 232. The moving mechanism 232 is movably arranged and has an initial position close to the fixing mechanism 231 and a pulling position away from the fixing mechanism 231. When the storage member 21 moves to the material receiving position, the fixing mechanism 231 fixes the first end of the mouth of the storage member 21, and the moving mechanism 232 is connected to the second end of the mouth of the storage member 21 and can pull open the mouth of the storage member 21. The moving mechanism 232 can move, and both the fixing mechanism 231 and the moving mechanism 232 can fix the mouth of the storage member 21, and when the moving mechanism 232 moves, the mouth of the storage member 21 can be pulled open, thereby switching the storage member 21 from a closed state to an open state.

[0373] Specifically, the storage member 21 is a storage bag;

[0374] like Figures 43 to 50 As shown, in one embodiment, the mouth of the storage member 21 is provided with a skeleton 211, the skeleton 211 can be supported on the conveying mechanism 22, and the fixing mechanism 231 and the moving mechanism 232 can cooperate with the skeleton 211. The skeleton 211 is connected to the mouth of the storage member 21, so that the mouth of the storage member 21 is easy to close and open. At the same time, the fixing mechanism 231 and the moving mechanism 232 can cooperate with the skeleton 211, thereby adjusting the mouth of the storage member 21.

[0375] like Figures 43 to 50As shown, in one embodiment, the skeleton 211 includes a first frame portion 2111 and a second frame portion 2112; an elastic member 2113 is disposed between the first frame portion 2111 and the second frame portion 2112, and the elastic member 2113 tends to make the first frame portion 2111 and the second frame portion 2112 fit together, and the arrangement of the first frame portion 2111 and the second frame portion 2112 can achieve fitting separation. The elastic member 2113 can pull the first frame portion 2111 and the second frame portion 2112, thereby making the first frame portion 2111 and the second frame portion 2112 fit together. Specifically, the elastic member 2113 is a torsion spring, and of course it can also be a spring.

[0376] In other embodiments, the first frame body 2111 and the second frame body 2112 are connected by bonding. Initially, the mouth of the storage member 21 is in an open state and moves on the conveying mechanism 22. After the storage member 21 stores the 3D printed object, the opening mechanism 23 pushes the mouth of the storage member 21, thereby making the mouth of the storage member 21 in a closed state, and the first frame body 2111 and the second frame body 2112 can be bonded together, thereby achieving the closure of the storage member 21.

[0377] In other embodiments, the first frame body 2111 and the second frame body 2112 are connected by snapping. Initially, the mouth of the storage member 21 is in an open state and moves on the conveying mechanism 22. After the storage member 21 stores the 3D printed object, the opening mechanism 23 pushes the mouth of the storage member 21, thereby making the mouth of the storage member 21 in a closed state, and the first frame body 2111 and the second frame body 2112 can be snapped together, thereby achieving the closure of the storage member 21.

[0378] In other embodiments, the first frame body 2111 and the second frame body 2112 are connected by a magnetic structure. Initially, the mouth of the storage member 21 is in an open state and moves on the conveying mechanism 22. After the storage member 21 stores the 3D printed object, the opening mechanism 23 pushes the mouth of the storage member 21, thereby making the mouth of the storage member 21 in a closed state, and the first frame body 2111 and the second frame body 2112 can be magnetically connected together, thereby realizing the closure of the storage member 21.

[0379] In other embodiments, the first frame body 2111 and the second frame body 2112 are connected by a ratchet structure. Initially, the mouth of the storage member 21 is in an open state and moves on the conveying mechanism 22. After the storage member 21 stores the 3D printed object, the opening mechanism 23 pushes the mouth of the storage member 21, so that the mouth of the storage member 21 is in a closed state, and the first frame body 2111 and the second frame body 2112 can be connected together, so as to achieve the closure of the storage member 21, and due to the setting of the ratchet structure, the first frame body 2111 and the second frame body 2112 cannot be separated.

[0380] like Figures 43 to 50 As shown, in one embodiment, the conveying mechanism 22 includes a first conveying part 221 and a second conveying part 222 that are spaced apart, the storage part 21 is located between the first conveying part 221 and the second conveying part 222, and the first conveying part 221 and the second conveying part 222 support the skeleton 211. An escape space is formed between the first conveying part 221 and the second conveying part 222, the storage part 21 is located in the escape space, and the first conveying part 221 and the second conveying part 222 support the skeleton 211. The storage part 21 can be in the escape space. The first conveying part 221 and the second conveying part 222 can support the skeleton 211, and when the first conveying part 221 and the second conveying part 222 move, the skeleton 211 can move following the first conveying part 221 and the second conveying part 222.

[0381] like Figures 43 to 50 As shown, in one embodiment, the fixing mechanism 231 is arranged at the end of the conveying mechanism 22 facing the moving mechanism 232, and the fixing mechanism 231 includes a positioning frame 2311 and a first telescopic member 2312 arranged on the positioning frame 2311, and the first telescopic member 2312 can extend toward the conveying mechanism 22 and enter the hole of the frame 211. The first telescopic member 2312 can extend and be inserted into the hole of the frame 211, so that the fixing mechanism 231 can be connected to the frame 211.

[0382] like Figures 43 to 50 As shown, in one embodiment, the moving mechanism 232 includes a moving member 2321 and a second telescopic member 2322 disposed on the moving member 2321. The moving member 2321 is movably disposed downstream of the conveying mechanism 22 along the conveying direction of the storage member 21, and the second telescopic member 2322 can extend toward the conveying mechanism 22 and enter the hole of the skeleton 211. The second telescopic member 2322 can extend and insert into the hole of the skeleton 211, thereby enabling the moving mechanism 232 to be connected to the skeleton 211, and when the moving mechanism 232 moves, it can pull the mouth of the storage member 21, thereby realizing the opening of the mouth of the storage member 21.

[0383] like Figures 43 to 50As shown, in one embodiment, the moving mechanism 232 further includes a guide structure 2323, a fixed frame 2324 and a first driving member 2325, the fixed frame 2324 is arranged at the end of the conveying mechanism 22, the guide structure 2323 is arranged between the fixed frame 2324 and the moving member 2321, and the first driving member 2325 drives the moving member 2321. The first driving member 2325 can drive the moving member 2321 to move, and the setting of the guide structure 2323 can make the movement of the moving member 2321 more stable.

[0384] like Figures 43 to 50 As shown, in one embodiment, the mobile mechanism 232 further includes a first transmission assembly 2326, the first transmission assembly 2326 includes a first transmission wheel 23261, a second transmission wheel 23262, and a first chain belt 23263 connected to the first transmission wheel 23261 and the second transmission wheel 23262, the mobile member 2321 cooperates with the first chain belt 23263, the first driving member 2325 cooperates with the first transmission wheel 23261, and the first driving member 2325 drives the first chain belt 23263 to move so as to drive the mobile member 2321 to move. The above-mentioned setting of the first transmission assembly 2326 can realize transmission, and the structure of the first transmission assembly 2326 is relatively simple, which is convenient for setting.

[0385] like Figures 43 to 50 As shown, in one embodiment, the moving mechanism 232 further includes a third transmission wheel 23264 and a second chain belt 23265, the second chain belt 23265 is connected between the third transmission wheel 23264 and the first driving member 2325, and the third transmission wheel 23264 and the first transmission wheel 23261 are coaxially arranged and move synchronously. The above arrangement enables the first driving member 2325 to be located below the fixed frame 2324, which can make the overall structure more compact.

[0386] like Fig.45 As shown, in one embodiment, the picking device further includes a material receiving container 35, and the material receiving container 35 is configured to receive the storage member 21. The material receiving container 35 can be provided to receive the storage member 21. Specifically, the material receiving container 35 is a material receiving box.

[0387] like Fig.51As shown, in one embodiment, the storage member 21 is arranged on the conveying mechanism 22 and is used to transport the storage member 21 to move in the vertical direction. The receiving assembly 20 also includes a sealing mechanism 24, which is arranged below the conveying mechanism 22. The sealing mechanism 24 has an avoidance position and a sealing position. The storage member 21 is located in the sealing mechanism 24. When the sealing mechanism 24 moves from the avoidance position to the sealing position, the sealing mechanism 24 seals the storage member 21. The storage member 21 is sleeved on the conveying mechanism 22 and can move on the conveying mechanism 22, so that when the 3D printed object enters the storage member 21, the sealing mechanism 24 can seal it.

[0388] like Figure 51 to Figure 53 As shown, in one embodiment, the conveying mechanism 22 further includes a base frame 223 and a guide cylinder 224, the guide cylinder 224 is arranged on the base frame 223, the receiving member 21 is sleeved on the guide cylinder 224, and the sealing mechanism 24 is located below the guide cylinder 224. The guide cylinder 224 is fixed on the base frame 223, thereby making the position of the guide cylinder 224 more stable. The receiving member 21 is sleeved on the guide cylinder 224.

[0389] like Figure 51 to Figure 53 As shown, in one embodiment, the conveying mechanism 22 further includes a rolling member 225, which is disposed on the outside of the guide cylinder 224 and in pressure contact with the receiving member 21, and the rolling member 225 rotates to move the receiving member 21. The rolling member 225 can squeeze the receiving member 21, and when the rolling member 225 rotates forward or reversely, the receiving member 21 can move up and down, so that the amount of 3D printed objects received by the receiving member 21 can be adjusted.

[0390] like Figure 51 to Figure 53 As shown, in one embodiment, the rolling member 225 includes a mounting frame 2251 and a roller 2252 disposed on the mounting frame 2251, and the mounting frame 2251 is connected to the base frame 223 through an elastic member. The roller 2252 is in abutment with the storage member 21, and due to the provision of the elastic member, the roller 2252 can achieve elastic movement, thereby ensuring that the roller 2252 is in abutment with the storage member 21, and the storage member 21 can be driven.

[0391] like Figure 51 to Figure 53 As shown, in one embodiment, the rolling member 225 includes a first rolling member 2253 and a second rolling member 2254, and the first rolling member 2253 and the second rolling member 2254 are arranged on opposite sides of the guide cylinder 224. The arrangement of the first rolling member 2253 and the second rolling member 2254 can make the movement of the storage member 21 more stable.

[0392] like Figure 51 to Figure 53As shown, in one embodiment, the conveying mechanism 22 further includes a second transmission assembly 251 and a second driving member 252, the second transmission assembly 251 is arranged between the first rolling member 2253 and the second rolling member 2254, and the second driving member 252 drives the first rolling member 2253 and the second rolling member 2254 to rotate in the same direction through the second transmission assembly 251. The first rolling member 2253 and the second rolling member 2254 move synchronously, thereby ensuring that the storage member 21 can move up and down.

[0393] like Figure 51 to Figure 53 As shown, in one embodiment, the second transmission assembly 251 includes a first gear 2511, a second gear 2512, a rotating wheel 2513 and a third chain belt 2514. The first gear 2511 is arranged on the driving shaft of the second driving member 252, the second gear 2512 is connected to the first rolling member 2253, the rotating wheel 2513 is connected to the second rolling member 2254, the third chain belt 2514 is connected between the rotating wheel 2513 and the first gear 2511, and the first gear 2511 is meshed with the second gear 2512. The second transmission assembly 251 can realize the linkage of the first rolling member 2253 and the second rolling member 2254, and can realize the same direction movement of the first rolling member 2253 and the second rolling member 2254.

[0394] like Figure 51 to Figure 53 As shown, in one embodiment, the roller 2252 includes a rolling column and a brush disposed on the rolling column. The brush can contact the storage member 21, thereby ensuring that the position of the storage member 21 is stable.

[0395] like Figure 51 to Figure 55 As shown, in one embodiment, the sealing mechanism 24 includes a wire feeding assembly 241 and a buckle assembly 242, which are arranged on the base frame 223 and located below the guide cylinder 224; the buckle assembly 242 can lock the metal wire buckle fed by the wire feeding assembly 241 on the storage member 21, thereby achieving the sealing of the storage member 21.

[0396] In other embodiments, the sealing mechanism 24 includes an ultrasonic welding mechanism.

[0397] like Figure 51 to Figure 55 As shown, in one embodiment, the material receiving assembly 20 further includes a tightening assembly 253, which is arranged between the sealing mechanism 24 and the guide cylinder 224. The tightening assembly 253 includes a first tightening member 2531 and a second tightening member 2532 which are arranged relatively, and the first tightening member 2531 and the second tightening member 2532 can be relatively close to or far away from each other. The first tightening member 2531 and the second tightening member 2532 can be close to or far away from each other, so that the storage member 21 can be contracted together, and then locked by the wire feeding assembly 241 and the buckle assembly 242, so as to ensure the sealing.

[0398] like Figure 51 to Figure 55 As shown, in one embodiment, the receiving assembly 20 further includes a cutting assembly 28, which is disposed on a side of the tightening assembly 253 away from the guide cylinder 224, and is used to cut off the storage member 21 between the two seals. The cutting assembly 28 can cut off the sealed storage member 21 to form a plurality of storage members 21, thereby effectively storing the 3D printed object.

[0399] like Figure 51 to Figure 55 As shown, in one embodiment, the cutting assembly 28 includes a base 281 and a first blade body 282, a second blade body 283 and a third driving member 284 arranged on the base 281. The first blade body 282 and the second blade body 283 are arranged relative to each other and have a cutting position and a separation position. The third driving member 284 is used to drive the first blade body 282 and the second blade body 283 to move between the cutting position and the separation position. When the first blade body 282 and the second blade body 283 are in the cutting position, the first blade body 282 and the second blade body 283 are arranged in a stacked manner. The first blade body 282 and the second blade body 283 move relative to each other to achieve cutting, and the first blade body 282 and the second blade body 283 are arranged in a stacked manner, so that the first blade body 282 and the second blade body 283 can be prevented from colliding with each other and causing damage to the first blade body 282 or the second blade body 283.

[0400] In other embodiments, the cutting assembly includes only the first blade body or only the second blade body, and the first blade body cooperates with the blade holder, or the second blade body cooperates with the blade holder, so that cutting can also be achieved.

[0401] like Figure 51 to Figure 55 As shown, in one embodiment, the base 281 includes a first base body 2811 and a second base body 2812, the first blade body 282 is arranged on the first base body 2811, the second blade body 283 is arranged on the second base body 2812, and the third driving member 284 is arranged between the first base body 2811 and the second base body 2812 so that the first base body 2811 and the second base body 2812 are close to each other or away from each other. The first base body 2811 can make the position of the first blade body 282 more stable, the second base body 2812 can make the position of the second blade body 283 more stable, and the arrangement of the first base body 2811 and the second base body 2812 can make the driving of the third driving member 284 easier.

[0402] like Figure 51 to Figure 55 As shown, in one embodiment, the cutting assembly 28 further includes an elastic support member 285, which is disposed between the first seat body 2811 and the first blade body 282. The provision of the elastic support member 285 allows the first blade body 282 to float, so that the first blade body 282 and the second blade body 283 can be in contact, thereby achieving a better cutting effect.

[0403] Of course, the elastic support member 285 can also be disposed between the second seat body 2812 and the second blade body 283 .

[0404] like Figure 51 to Figure 56 As shown, in one embodiment, a strip hole 28121 is provided on the second seat body 2812, and the second blade body 283 is adjustably connected in the strip hole 28121, and the length direction of the strip hole 28121 is the same as the axial direction of the guide cylinder 224. The provision of the strip hole 28121 can adjust the position of the second seat body 2812, so that the second blade body 283 on the second seat body 2812 can be arranged in close contact with the first blade body 282.

[0405] like Figure 57 to Figure 61 As shown, in one embodiment, the storage member 21 has a first material receiving position and a second material receiving position, and the conveying mechanism 22 can drive the storage member 21 to move between the first material receiving position and the second material receiving position; when the storage member 21 is located at the first material receiving position, the unloading assembly 14 can allow the 3D printed object on the molding surface to enter the storage member 21; when the storage member 21 is located at the second material receiving position, the conveying mechanism 22 clamps the storage member 21 to prepare to place the storage member 21 on the storage rack 27, or the conveying mechanism transfers the 3D printed object in the storage member 21 to the material tray 12. Through the above-mentioned settings, the conveying mechanism 22 can realize the clamping function, that is, it can clamp the storage member 21 for storage.

[0406] like Figure 57 to Figure 61 As shown, in one embodiment, the conveying mechanism 22 includes a sliding assembly 226, which can drive the storage member 21 to move between the first material receiving position and the second material receiving position. The sliding assembly 226 can drive the storage member 21 to move and thus realize the conveyance of the 3D printed object.

[0407] like Fig.57 and Fig.58 As shown, in one embodiment, the storage member 21 includes a storage box 212, and the storage box 212 includes a box body 2121 and a cover 2122 for opening and closing the box body 2121, and a stopper 2123 is provided on the cover 2122. The conveying mechanism 22 grabs the storage box 212 and moves it to the bottom of the molding surface, and the stopper 2123 can abut against the side wall of the 3D printing device, so that the cover 2122 can be opened, and the 3D printed object can fall into the box body 2121. When the storage is completed, the manipulator 29 clamps the storage box 212 and moves it, and makes the storage box 212 leave from the bottom of the molding surface, and the cover 2122 can close the box body 2121.

[0408] Specifically, the conveying mechanism 22 is a robot.

[0409] like Fig.57 and Fig.58 As shown, in one embodiment, a magnetic member is provided on the stopper 2123. The magnetic member can cooperate with the 3D printing device by magnetic attraction, thereby making the position of the cover 2122 more stable.

[0410] like Fig.57 and Fig.58 As shown, in one embodiment, an opening is provided on the side wall of the box body 2121, and the material tray 12 is provided on one side of the opening. The sliding assembly 226 is also used to transfer the 3D printed objects in the storage member 21 to the material tray 12. The setting of the opening allows the 3D printed objects to fall out of it. The material tray 12 is provided in multiple numbers, and the 3D printed objects belonging to the same user case can be stored in one or more material trays 12, and the 3D printed objects of different user cases can be stored in different material trays 12, which is conducive to saving subsequent sorting time and improving production efficiency.

[0411] The material collection position is located below the material discharging assembly 14. This ensures that material collection can be achieved.

[0412] like Figure 59 to Figure 61 As shown, in one embodiment, the sliding assembly 226 includes a first motor, a second motor, a slide 2261 and a connecting rod 2262, the first motor is used to drive the slide 2261 to move between the first material receiving position and the second material receiving position; the connecting rod 2262 is arranged on the slide 2261, the box body is rotatably arranged on the connecting rod 2262, and the second motor is used to drive the box body to rotate relative to the connecting rod 2262. The slide 2261 can slide and thus adjust the position of the connecting rod 2262, and the box body 2121 can swing relative to the connecting rod 2262, so that when the box body 2121 on the side close to the molding platform is lower than the box body 2121 on the side away from the molding platform, the 3D printed object can enter the box body 2121, and when it needs to be transported, the swing direction of the box body 2121 is adjusted by the second motor so that the side of the box body 2121 away from the molding platform is at a lower position, so that the 3D printed object can fall out of the box body 2121.

[0413] like Fig.62 and Fig.63 As shown, in one embodiment, the material receiving assembly 20 further includes a support frame 26, and a plurality of material trays 12 are movably disposed on the support frame 26, and the sliding assembly 226 can place the 3D printed object in the storage box 212 in at least one of the plurality of material trays 12. In this way, it is not necessary to replace the storage box 212 every time, thereby effectively improving the efficiency of transportation.

[0414] like Fig.64 and Fig.65As shown, in one embodiment, the storage box 212 includes a plurality of storage boxes; the conveying mechanism 22 includes a manipulator 29, and the manipulator 29 can clamp one of the plurality of storage boxes 212 and move it to the second material receiving position. After the 3D printed object is packed in the storage box 212, the manipulator 29 clamps the storage box 212 and places the storage box 212 on the storage rack 27. The above arrangement can effectively realize the classified collection of 3D printed objects.

[0415] In one embodiment of the present disclosure, a system for three-dimensional printing includes a post-processing device 300, which includes: a material receiving mechanism, including a material receiving body, the material receiving body is configured to carry a 3D printed object with excess printing material; a driving mechanism, the driving mechanism is configured to allow the material receiving mechanism to rotate from a first state to a second state so that the excess printing material drips from the 3D printed object, wherein the 3D printed object has at least two different inclination angles.

[0416] Applying the technical solution of the present disclosure, the post-processing device includes a material receiving mechanism, including a material receiving body, the material receiving body is configured to carry a 3D printed object with excess printing material; a driving mechanism, the driving mechanism is configured to allow the material receiving mechanism to rotate from a first state to a second state, so that the excess printing material drips from the 3D printed object, wherein the 3D printed object has at least two different inclination angles. By adopting the above-mentioned method, by adjusting the drip angle, the entire dripping process is not fixed at a single dripping position, so that the excess printing material on the 3D printed object can be better separated, and the efficiency of separating excess resin is improved. At the same time, through the device provided by the present disclosure, a better resin separation effect can be achieved, the solvent consumption and cleaning time during the later cleaning can be reduced, and the separated resin can also be recycled. Applying this solution, in some scenarios, compared with the case of no recycling, more than 70% of the resin printing material can be saved.

[0417] It should be noted that the post-processing device can be used alone. In this case, the material receiving mechanism also includes a material receiving container, and the driving mechanism can rotate the material receiving body so that the 3D printed object is moved out of the material receiving body and enters the material receiving container through the opening of the material receiving container. The post-processing device can also be used before the object picking device, that is, to post-process the 3D printed object before the object is picked up and stored. In this case, the driving mechanism can rotate the material receiving body so that the 3D printed object is moved out of the opening of the material receiving body and enters the storage member through the opening of the storage member.

[0418] like Figure 66 to Figure 67As shown, the embodiment of the present disclosure provides a post-processing device 300, which includes a material receiving mechanism 3 and a movable mechanism 4. The material receiving mechanism 3 is used to carry a 3D printed object 8 with excess printing material 6. The movable mechanism 4 is used to change the dripping position of the 3D printed object 8 so that the excess printing material 6 drips from the 3D printed object 8. The 3D printed object 8 has at least two different inclination angles during the change of the dripping position; or, the movable mechanism 4 is used to set the 3D printed object 8 at a first dripping position in a first time period to separate the excess printing material 6 adhered to the 3D printed object 8. The inclination angle of the 3D printed object 8 in the first dripping position is determined based on a preset angle value and / or a shape feature of the 3D printed object 8.

[0419] The post-processing device 300 provided in this embodiment is applied, and the movable mechanism 4 is used to change the dripping position of the 3D printed object 8, so that the excess printing material 6 drips from the 3D printed object 8. Alternatively, the movable mechanism 4 is used to set the 3D printed object 8 at the first dripping position in the first time period to separate the excess printing material 6 adhering to the 3D printed object 8. Since the dripping angle is adjusted, the entire dripping process is not fixed at a single dripping position, and the excess printing material 6 on the 3D printed object 8 can be better separated. Since the inclination angle of the 3D printed object 8 in the first dripping position is determined based on the preset angle value and / or the shape characteristics of the 3D printed object 8, the excess printing material 6 on the 3D printed object 8 can also be better separated, and the efficiency of separating the excess resin is improved. At the same time, through the device provided by the present disclosure, a better resin separation effect can be achieved, the solvent consumption and cleaning time during the later cleaning are reduced, and the separated resin can also be recycled.

[0420] Specifically, the excess printing material 6 on the 3D printed object 8 after dripping is reduced, which can make the post-process (such as the cleaning process) easier, save the solvent consumption of post-cleaning, and of course can also be connected to solvent-free cleaning (centrifugation, vacuum, etc.). In addition, in some scenarios, most of the resin on the 3D printed object 8 after dripping has been removed, and the 3D printed object 8 can also be directly re-cured to reduce the post-processing process.

[0421] In the prior art, the industry mostly adopts the solution of dripping by self-weight. After printing is completed, the 3D printed object 8 is placed on the platform for a period of time before taking out the 3D printed object 8, or the platform with the 3D printed object 8 is placed at an angle to facilitate the resin to flow back to the material tray. However, the entire process is completed on the printer, which is not only inefficient and has a small amount of recycled resin, but also occupies the printer and platform, resulting in low equipment utilization, affecting the overall production rhythm. The post-processing device 300 provided in this embodiment can accelerate and increase the recycling of resin without occupying the 3D printer. It should be noted that the post-processing device 300 provided in this embodiment can realize automatic adjustment of multi-angle dripping, and the device can be with or without a molding platform.

[0422] Among them, the movable mechanism 4 can adopt a toggle rod structure to directly toggle the 3D printed object 8 to change the angle of the 3D printed object 8, so as to achieve the dripping of at least one different angle of the 3D printed object 8. This method does not require the material receiving mechanism 3 to rotate. Alternatively, the dripping of the resin is accelerated by partial external force, such as wind blowing, slight centrifugal vibration, shaking, rotational acceleration centrifugation, and deflection. The goal is to make the resin drip more fully. It is just a slight movement to accelerate the dripping of the resin. The structure is relatively simple and can be automated. Alternatively, the viscosity of the resin is reduced by heating, so that the resin drips more easily. The heating method includes far-infrared light, heated gas, etc. A resin recovery structure can also be added: using a screen, a filter, etc., the recycled resin can be selected to be mixed with a new resin in a certain proportion, used again, or used directly.

[0423] Specifically, the angle of the material receiving mechanism 3 is adjusted according to the preset value each time, and the angle can also be adjusted to match the shape of the 3D printed object 8. After each angle adjustment, the timing starts, and the next angle is switched after the set time is reached, so that the dripping time at each angle is constant. The set time can be 2, 3, 5 minutes, etc. Before or after adjusting the angle, auxiliary heating can be performed. By setting a temperature sensor 54, the heating source 52 can be turned on or off in time. Before or after adjusting the angle, the blowing mechanism (wind knife, air gun, etc.) can be turned on to blow air to the 3D printed object 8. The blowing time can also be set.

[0424] In this embodiment, the movable mechanism 4 is a driving mechanism 41, and the driving mechanism 41 is configured to allow the material receiving mechanism 3 to rotate from the first state to the second state, so that the excess printing material 6 drips from the 3D printed object 8, wherein the 3D printed object 8 has at least two different inclination angles. When the material receiving mechanism 3 rotates from the first state to the second state, the excess printing material 6 can drip from the 3D printed object 8.

[0425] It should be noted that the material receiving mechanism 3 rotates from the first state to the second state, including continuous switching, interval switching, etc. The dripping position or tilt angle of the 3D printed object 8 corresponding to the first state and the second state is different. In other words, during the rotation of the material receiving mechanism 3 from the first state to the second state, the dripping position of the 3D printed object 8 changes, and during the change of the dripping position, the 3D printed object 8 has at least two different tilt angles, so that excess printing material 6 drips from the 3D printed object 8. Exemplarily, the 3D printed object 8 is kept at at least one dripping position for a preset time; or the 3D printed object 8 is continuously switched between several dripping positions; or the 3D printed object 8 is kept at at least one dripping position for a preset time and continuously switched between several dripping positions.

[0426] In one implementation, the drive mechanism 41 may also be configured to keep the material receiving mechanism 3 in the first state for a first period of time to separate the excess printing material 6 adhering to the 3D printed object 8. It should be noted that the drive mechanism 41 is configured to keep the material receiving mechanism 3 in the first state for a first period of time, which means that the drive mechanism 41 is configured to keep the material receiving mechanism 3 at a certain dripping position for a period of time.

[0427] It can be understood that, in one implementation, the first state corresponds to the first dripping position, that is, when the material receiving mechanism 3 is in the first state, the 3D printed object 8 is set at the first dripping position to separate the excess printing material 6 adhering to the 3D printed object 8, and the inclination angle of the 3D printed object 8 in the first dripping position is determined based on a preset angle value and / or the shape characteristics of the 3D printed object 8.

[0428] like Fig.66 , Fig.67 As shown, the embodiment of the present disclosure provides a post-processing device 300, which includes a material receiving mechanism 3 and a driving mechanism 41. The material receiving mechanism 3 is configured to carry a 3D printed object 8 with excess printing material 6, and the driving mechanism 41 is configured to allow the material receiving mechanism 3 to rotate from a first state to a second state. When the material receiving mechanism 3 rotates from the first state to the second state, the excess printing material 6 can drip from the 3D printed object 8, so that the entire dripping process is not fixed at a single dripping position, and the excess printing material 6 on the 3D printed object 8 can be better separated, while improving the efficiency of separating excess resin.

[0429] like Fig.66 , Fig.67As shown, the material receiving mechanism 3 includes a material receiving body 31, and the material receiving body 31 has an opening 310, a liquid outlet 311, and a receiving cavity 312 for receiving the 3D printed object 8, and the opening 310 and the liquid outlet 311 are both connected to the receiving cavity 312. The 3D printed object 8 can enter the receiving cavity 312 through the opening 310, and the excess printing material 6 on the 3D printed object 8 can drip through the liquid outlet 311.

[0430] In one embodiment, the 3D printing device can automatically transfer the printed 3D printed object 8 to the material receiving body 31. Specifically, the 3D printing device also includes a separation device and a blanking component. The separation device is used to separate the 3D printed object 8 from the molding surface, and the blanking component is used to transfer the 3D printed object 8 separated from the molding surface to the material receiving body 31. For ease of understanding, the following separation device is described using a shovel mechanism as an example. In other embodiments, the separation device can also use an extrusion mechanism, an ejection mechanism, or a laser cutting mechanism, etc., without limitation. The working principles of the separation device and the blanking component have been described in the above embodiments and will not be repeated here.

[0431] like Fig.66 As shown, the material receiving body 31 includes a side portion 313 and a bottom portion 314, one end of the side portion 313 is connected to the bottom portion 314, the opening 310 of the material receiving body 31 is arranged on a side of the material receiving body 31 opposite to the bottom portion 314, and the liquid outlet 311 is arranged on the side portion 313 and / or the bottom portion 314. The 3D printed object 8 can enter from the opening 310 on one side of the material receiving body 31, and the excess printing material 6 on the 3D printed object 8 can drip through the liquid outlet 311 on the side portion 313 and / or the bottom portion 314.

[0432] The driving mechanism 41 further includes a first transmission mechanism 411, which is drivingly connected to the material receiving body 31 to drive the material receiving body 31 to rotate around the transverse axis. During the rotation of the material receiving body 31, or after the material receiving body 31 changes position by rotation, the excess printing material 6 on the 3D printed object 8 can be separated.

[0433] In one embodiment, if Fig.66 As shown, the first transmission mechanism 411 includes a motor, a synchronous belt and a rotating shaft, the motor is arranged on one side of the material receiving body 31, the output end of the motor is connected to one end of the synchronous belt, the other end of the synchronous belt is connected to the rotating shaft, and the rotating shaft is arranged on the material receiving body 31. When the motor rotates, it drives the synchronous belt to rotate, and the synchronous belt can drive the rotating shaft to rotate, so that the rotating shaft drives the material receiving body 31 to rotate, and then drives the material receiving body 31 to rotate around the transverse axis.

[0434] In one embodiment, if Fig.68As shown, the first transmission mechanism 411 includes a motor and a rotating shaft, the motor is arranged at one side of the material receiving body 31, the output end of the motor is connected to the rotating shaft, and the rotating shaft is arranged on the material receiving body 31. The motor directly drives the rotating shaft to rotate, thereby using the rotating shaft to drive the material receiving body 31 to rotate, and then driving the material receiving body 31 to rotate around the transverse axis. Using the direct drive of the motor can simplify the drive structure.

[0435] In other embodiments, the motor can be replaced by a rotary cylinder, or the first transmission mechanism 411 can use a combination of a screw and a motor. A cylinder, a synchronous wheel, a synchronous belt, a sprocket chain, a gear rack 342, a worm gear, etc. can also be used to achieve the rotation of the material receiving body 31.

[0436] In one embodiment, the cross-sectional area of ​​the material receiving body 31 gradually decreases from top to bottom. Excess printing material 6 on the 3D printed object 8 can flow down along the inclined inner wall of the material receiving body 31, so that the excess printing material 6 can drip through the liquid outlet 311.

[0437] It should be noted that if Fig.69 , Fig.70 As shown, the structure of the material receiving body 31 includes one of square, spherical, hemispherical, V-shaped, and funnel-shaped structures, and the liquid outlet 311 includes one or more of a circular hole, a square hole, a triangular hole, and a strip-shaped opening 310. The structural type of the material receiving body 31 and the type of the liquid outlet 311 can be arbitrarily combined as long as the 3D printed object 8 can be supported and the excess printing material 6 can be dripped.

[0438] In one embodiment, the material receiving body 31 includes an oleophobic layer or a hydrophobic layer. By adjusting the polarity of the materials, the polarities of the test printing consumables and the material receiving body 31 are repelled. For example, if the resin is oily, an oleophobic material, i.e., an oleophobic layer, can be provided on the surface of the material receiving body 31. If the resin is water-based, a hydrophobic material, i.e., a hydrophobic layer, can be provided on the surface of the material receiving body 31. Alternatively, the material receiving body 31 can be made directly of an oleophobic / hydrophobic material.

[0439] In one embodiment, the material receiving mechanism 3 further includes a first liquid receiving container 33, and the first liquid receiving container 33 is configured to receive the printing material from the material receiving body 31. The excess printing material 6 can enter the first liquid receiving container 33 after dripping through the liquid outlet 311.

[0440] In one embodiment, if Fig.66 , Fig.67As shown, the material receiving mechanism 3 also includes a material receiving container 35 and a second transmission mechanism 34. The material receiving container 35 is located below the first liquid receiving container 33. The first transmission mechanism 411 can rotate the material receiving body 31 to allow the 3D printed object 8 to move out of the opening 310 of the material receiving body 31 and enter the material receiving container 35 through the opening 310 of the material receiving container 35, so that the 3D printed object 8 in the material receiving body 31 is received by the material receiving container 35, completing the fully automated process of taking out-drip-recovery. The second transmission mechanism 34 can drive the first liquid receiving container 33 to move relative to the material receiving container 35 to allow the 3D printed object 8 to enter the material receiving container 35 through the opening 310 of the material receiving container 35, so as to avoid being blocked by the first liquid receiving container 33 during the process of the 3D printed object 8 entering the material receiving container 35.

[0441] It should be noted that the first transmission mechanism 411 and the second transmission mechanism 34 can be driven independently (for example, two motors drive the material receiving body 31 and the first liquid receiving container 33 respectively), or can be driven synchronously through structural linkage.

[0442] like Fig.66 As shown, the linkage to achieve synchronous drive can be achieved through the following structure: the second transmission mechanism 34 includes a sector gear 341 and a rack 342, and the sector gear 341 and the synchronous wheel are fixed on the same axis, and the synchronous movement of the two transmission mechanisms is achieved through a unified drive motor.

[0443] In one embodiment, the material receiving mechanism 3 further includes a material recovery container 7 , and the material recovery container 7 is configured to receive the printing material from the material receiving body 31 .

[0444] In one embodiment, referring to Fig.68 The material receiving mechanism 3 also includes a material receiving container 35, a transfer receiving container 38, a toggle mechanism 391 and a third transmission mechanism 392. The material receiving container 35 is located on the side of the material receiving body 31, and the first transmission mechanism 411 can rotate the material receiving body 31 to move the 3D printed object 8 out of the opening 310 of the material receiving body 31 and into the transfer receiving container 38. The toggle mechanism 391 is arranged in the transfer receiving container 38, and the third transmission mechanism 392 can drive the toggle mechanism 391 to move the 3D printed object 8 out of the transfer receiving container 38 and into the material receiving container 35 through the opening 310 of the material receiving container 35, completing the fully automated process of picking up-drip-recovery. By setting the transfer receiving container 38, the 3D printed object 8 is transferred using the transfer receiving container 38, which has the advantage of flexible transportation.

[0445] It should be noted that the material receiving container 35 can also be equipped with a full material sensor, which is used to detect whether the printed objects 8 in the material receiving container 35 are stacked to a predetermined height, or detect whether the printed objects 8 in the material receiving container 35 reach a predetermined weight. In this way, it can be determined whether the printed objects 8 need to be transferred based on the stacking height or total weight of the printed objects 8 in the material receiving container 35.

[0446] In one embodiment, the material receiving mechanism 3 further includes: a first liquid receiving container 33 and a second liquid receiving container 36, the first liquid receiving container 33 is configured to receive the printing material from the material receiving body 31, and the second liquid receiving container 36 is connected to the first liquid receiving container 33 and the material recovery container 7 respectively; optionally, a liquid receiving track is provided between the second liquid receiving container 36 and the 3D printing device.

[0447] As shown in FIG67 , the material receiving mechanism 3 further includes a second liquid receiving container 36, and the second liquid receiving container 36 is used to connect to the material recovery container 7. The opening 310 of the second liquid receiving container 36 is connected to the first liquid receiving container 33, and the excess printing material 6 from the 3D printed object 8 received by the first liquid receiving container 33 can enter the second liquid receiving container 36, so as to realize the recycling of the printing material. A liquid receiving track 37 is provided between the second liquid receiving container 36 and the 3D printing device. The liquid receiving track 37 is used to guide the resin dripping during the shovel piece connection process into the second liquid receiving container 36. The recovered resin can be filtered and then used, or mixed with new resin in proportion and then used.

[0448] Specifically, there are various ways to recycle resin. Since the resin recovered after draining is close to the reaction area, its material properties are slightly different from those of new resin. When it is reused for the second time, the recycled resin and new resin can be mixed and reused according to the actual needs of the 3D printed object 8. When the method of centralized reuse after collection is adopted, it is necessary to control different proportions of mixing or not mixing and reuse according to actual needs. When it is directly transported back to the printer for recycling after draining, since there is new resin in the material tray, there is no need to consider mixing separately.

[0449] In one embodiment, if Figure 71-Figure 73As shown, the separation device is used to separate the 3D printed object 8 from the molding surface, and the material receiving body 31 is configured to allow movement between a first position and a second position. The material receiving body 31 is configured to receive the 3D printed object 8 with excess printing material 6 at the first position, and to allow the material receiving body 31 to rotate from the first state to the second state at the second position. It can be understood that when the material receiving body 31 moves to the first position, the material receiving body 31 is located below the separation device, and the 3D printed object 8 is separated from the molding surface by the separation device. At this time, the material receiving body 31 can receive the 3D printed object 8 with excess printing material 6. Then, the material receiving body 31 is moved to the second position, at which time the material receiving body 31 is located on one side of the 3D printing device, and the material receiving body 31 can rotate from the first state to the second state, thereby separating the excess printing material 6 on the 3D printed object 8.

[0450] The material receiving body 31 includes a cover plate 32, which can be opened and closed at the opening 310 of the material receiving body 31. A stopper 321 is provided on the cover plate 32, and a return spring is provided between the cover plate 32 and the material receiving body 31. When the material receiving body 31 moves to the first position, the stopper 321 abuts against the housing of the 3D printing device, and the cover plate 32 stops moving, so that the cover plate 32 is opened. When the material receiving body 31 leaves the first position, the cover plate 32 is closed under the action of the return spring elastic force. At this time, the cover plate 32 can cover the opening 310 to prevent the 3D printed object 8 from falling from the opening 310 of the material receiving body 31.

[0451] In an optional embodiment, a magnetic member is provided on the stopper 321. The magnetic member can cooperate with the 3D printing device by magnetic attraction, thereby making the position of the cover plate 32 more stable. The stopper 321 and the magnetic attraction method are used to realize the opening and closing of the cover plate 32, which has the advantages of simple structure and high reliability. In other embodiments, the cover plate 32 can also be driven to move by means of pneumatic clamps or electric clamps.

[0452] It should be noted that if the method of not adding the cover plate 32 is adopted, the rotation angle and the dripping angle of the material receiving body 31 need to be controlled during the draining process, and the angle during the draining process is limited by position detection to prevent the 3D printed object 8 from falling out during the dripping process.

[0453] In one embodiment, the driving mechanism 41 further includes a sliding assembly 412, and the sliding assembly 412 can drive the material receiving body 31 to move between the first position and the second position. The sliding method can improve the stability of the material receiving body 31 when moving.

[0454] Specifically, Fig.73As shown, the sliding assembly 412 includes a first motor, a second motor, a slide 4121 and a connecting rod 4122. The first motor is used to drive the slide 4121 to drive the material receiving body 31 to move between the first position and the second position, so as to achieve the position switching of the material receiving body 31. The connecting rod 4122 is arranged on the slide 4121, and the material receiving body 31 can be rotatably arranged on the connecting rod 4122. The second motor is used to drive the material receiving body 31 to rotate relative to the connecting rod 4122, so that the material receiving body 31 rotates from the first state to the second state at the second position, so that the excess printing material 6 can drip from the 3D printed object 8. The specific working process of rotating from the first state to the second state has been described in the above embodiment and will not be repeated here.

[0455] By adopting the above-mentioned embodiment, by adjusting the dripping angle, the entire dripping process is not fixed at a single dripping position, so that the excess printing material 6 on the 3D printed object 8 can be better separated, and the efficiency of separating the excess resin is improved. At the same time, through the device provided by the present disclosure, a better resin separation effect can be achieved, the solvent consumption and cleaning time during the later cleaning can be reduced, and the separated resin can also be recycled.

[0456] It should be noted that the correspondence between the post-processing device 300 and the printer can be set separately or in combination. Specifically, the configuration of the post-processing device 300 and the printer can be various, and the printer can be used to achieve integrated production. A single printer corresponds to a single set of post-processing devices 300. In addition to automatically pouring them into the post-processing device 300 after printing, the 3D printed objects 8 of multiple printers can be collected and placed into the material receiving body 31 of one or more sets of post-processing devices 300 by equipment or manually. The 3D printed objects 8 of multiple printers can also be placed into the material receiving body 31 of one or more sets of post-processing devices 300.

[0457] In this embodiment, the 3D printing device also includes a pipeline for conveying printing materials to the material tray. One end of the pipeline is connected to the material recovery container 7 of the post-processing device 300, and the other end is connected to the material tray, thereby realizing the recycling of printing materials, saving printing materials, and reducing costs.

[0458] The disclosed embodiment also provides a method for three-dimensional printing, comprising: controlling a material receiving mechanism to carry a 3D printed object with excess printing material; rotating the material receiving mechanism from a first state to a second state so that the excess printing material drips from the 3D printed object, wherein the 3D printed object has at least two different inclination angles.

[0459] Optionally, the method further comprises: maintaining the material receiving mechanism in the first state for a first period of time.

[0460] In order to facilitate a better understanding of the present disclosure, the inventive principle of the present disclosure is further described below.

[0461] like Fig.74 , Fig.75 As shown, in the present disclosure, the excess printing material 6 is mainly caused to drip from the 3D printed object 8 by gravity or the combined force of gravity and other forces (such as wind force, vibration force, etc.), and gravity or the combined force of gravity and other forces drives the excess printing material 6 to leave the surface of the 3D printed object 8.

[0462] It should be noted that the 3D printed object 8 includes a solid or semi-solid polymer, and the excess printing material 6 includes uncured polymer resin. After the 3D printing is completed, due to the properties of the printing material itself, such as the resin material having a certain viscosity, the resin material can adhere to the surface of the 3D printed object 8, resulting in the surface of the 3D printed object 8 being covered with unused polymer resin brought out from the printing area; or, due to the structure of the 3D printed object 8 itself, it is in a fixed position during the molding process, and there will be more liquid accumulation areas on the 3D printed object 8, such as an inverted cup mouth structure, a C-shaped dental mold, a hollow dental mold, etc., and uncured resin materials are likely to exist in these liquid accumulation areas. The presence of these resins will not only cause a large amount of material loss, but also increase the difficulty of subsequent processing, so it is necessary to separate these excess resins from the 3D printed object 8.

[0463] In the embodiment of the present disclosure, the dripping position of the 3D printed object 8 is changed, and the inclination angle of the 3D printed object 8 can be changed, so that the excess printing material 6 drips from the 3D printed object 8. By adjusting the dripping angle, the entire dripping process is not fixed at a single dripping position, and the excess printing material on the 3D printed object 8 can be better separated, thereby improving the efficiency of separating excess resin. At the same time, the device provided by the present disclosure can achieve a better resin separation effect, reduce the solvent consumption and cleaning time during the later cleaning, and can also recycle the separated resin. In some application scenarios, the 3D printed object 8 can be directly cured after dripping, and the present disclosure does not limit this.

[0464] like Fig.75 (a) Fig.75 (b) and Fig.75As shown in (c), the 3D printed object 8 is arranged in the material receiving mechanism 3, and the 3D printed object 8 changes its position following the material receiving mechanism 3. The figure shows three different dripping positions of the material receiving mechanism 3 and the 3D printed object 8, which are recorded as dripping position a, dripping position b, and dripping position c. It can be understood that the material receiving mechanism 3 and the 3D printed object 8 have different inclination angles in different dripping positions. Among them, the inclination angle represents the angle of the 3D printed object 8 relative to the vertical direction (Z direction in the figure), and the value range of the inclination angle is -180°~+180°. Exemplarily, the inclination angle is determined based on the bottom edge of the 3D printed object 8 in contact with the material receiving mechanism 3. Exemplarily, the dripping position can be customized based on user needs, for example, the dripping position corresponds to the inclination angle one by one, and the inclination angle changes once each time the dripping position is changed; or the two are set separately, and the inclination angle changes multiple times each time the dripping position is changed. In a specific application, the drop position of the 3D printed object 8 is changed by changing the tilt angle multiple times, which is beneficial to separating the excess printing material on different surfaces and liquid accumulation areas of the 3D printed object 8.

[0465] Furthermore, the movable mechanism 4 is also used to: keep the 3D printed object 8 at at least one dripping position for a preset time; or continuously switch the 3D printed object 8 between several dripping positions; or keep the 3D printed object 8 at at least one dripping position for a preset time and continuously switch between several dripping positions. The preset time t can be 10s, 30s, 1min, 3min, 5min, etc., which is not limited in the present disclosure.

[0466] It can be understood that the movable mechanism 4 in the present disclosure is used to control the dripping position of the 3D printed object 8. After changing the dripping position, the 3D printed object 8 can also be kept at any dripping position, that is, the entire dripping process is not fixed at a single dripping position. Exemplarily, the preset times for different dripping positions can be set to be the same or different, for example, after the 3D printed object 8 is kept at the dripping position a for 1 minute, the 3D printed object 8 is changed to the dripping position b at an arbitrary speed and kept for 3 minutes, and then the 3D printed object 8 is changed to the dripping position c and kept for 1 minute; the 3D printed object 8 can also be continuously switched between the dripping positions a, b, and c, for example, the 3D printed object 8 is continuously switched according to abca or acbca; the 3D printed object 8 can also be continuously switched between the dripping positions a and c and kept at the dripping position b for t time, for example, the 3D printed object 8 is continuously switched between the dripping positions a and c at an arbitrary speed according to acca within the time period t1-t2, and then the 3D printed object 8 is changed to the dripping position b at time t2, and then kept for t time.

[0467] Reference Fig.76In one embodiment, the movable mechanism 4 is also used to keep the 3D printed object 8 at the dripping position of the opening part of the liquid accumulation area 81 downward for a preset time; wherein the liquid accumulation area 81 is formed by the structure of the 3D printed object 8 itself. In a specific application, if the 3D printed object 8 has a liquid accumulation area 81 caused by a special structure, such as an inverted cup mouth structure, the dripping position of the cup mouth part of the inverted cup mouth structure downward can be recorded as the dripping position b, and then the dripping is performed by staying at the dripping position b for t time and continuously switching to other positions, which can further improve the efficiency of separating excess printing materials.

[0468] like Fig.77 As shown, the method of cleaning excess resin by centrifugation in the prior art is demonstrated. The rotation of the rotor generates a centrifugal force that drives the excess printing material away from the center of rotation and away from the surface of the object. The inclination angle of the 3D printed object 8 does not change during the centrifugation process. Fig.76 , Fig.77 It can be seen that for some 3D printed objects 8 with special structures, such as an inverted cup mouth structure, a C-shaped dental mold, a hollow dental mold, etc., there will be some liquid accumulation areas 81. When the resin is thrown off by centrifugation, if the opening in the liquid accumulation area 81 is small or the opening is not set downward, the resin in the liquid accumulation area 81 is not easy to fall out. Therefore, the centrifugal method cannot clean the above-mentioned liquid accumulation area 81 very well, which may easily lead to the resin material in the liquid accumulation area not being thrown off, and the effect of centrifugal cleaning is not good. In addition, the speed and time of centrifugal cleaning are not easy to control. For objects with fragile structures, they are easily damaged by long-term centrifugal force. Excessive centrifugal force will cause the equipment to vibrate and make excessive noise, the equipment will be unstable, and the resin will splash and be difficult to collect. Fig.85 As shown, the direction of the centrifugal force during the centrifugal process is along the tangent direction, and the resin material will fly out along the tangent due to the centrifugal force.

[0469] By using the device disclosed in the present invention, the dripping angle is adjusted so that the entire dripping process is not fixed at a single dripping position. The excess printing material is mainly dripped from the 3D printed object by gravity or the combined force of gravity and other forces (such as wind force, vibration force, etc.), which can better separate the excess printing material on the 3D printed object 8, improve the efficiency of separating excess resin, and will not cause damage to the 3D printed object. In the process of resin material dripping, the resin material can fall vertically, and can also fall in a parabola under the action of wind, similar to the process of rain, and the resin material will not fly out.

[0470] In one embodiment, the movable mechanism 4 includes: a driving mechanism 41; the material receiving mechanism 3 is connected to the driving mechanism 41, so that the driving mechanism 41 drives the material receiving mechanism 3 and the dripping position of the 3D printed object 8 to change.

[0471] Specifically, the driving mechanism 41 includes a rotating shaft, such as a rotating shaft of a motor, and the rotating shaft of the motor is connected to the material receiving mechanism 3. The motor drives the 3D printed object 8 to rotate along the A axis to achieve the change of the dripping position of the 3D printed object 8, such as Fig.74 In some embodiments, the motor drives the 3D printed object 8 to rotate along point B to achieve the change of the dripping position of the 3D printed object 8, such as Fig.78 As shown. The rotation speed of the motor shaft can be set to a slow speed, that is, much less than the rotation speed of the centrifugal device, such as 50r / min or less than 50r / min or less, such as 5r / min, 10r / min, 15r / min, 20r / min, 30r / min, etc. During the rotation process, the excess printing material is mainly dripped by gravity, and the centrifugal force is basically not used. Of course, the rotation speed can also be set to more than 50r / min according to demand, and the excess printing material is dripped by the combined force of gravity and slight centrifugal force. The present disclosure does not limit the rotation speed.

[0472] It should be noted that in this embodiment, the rotating shaft of the driving mechanism 41 is configured to be non-parallel to the vertical direction (gravity direction). Optionally, the rotating shaft of the driving mechanism 41 is perpendicular to the vertical direction (gravity direction), which can change the dripping position of the 3D printed object 8, that is, the inclination angle relative to the vertical direction changes. The excess printing material in the present disclosure is mainly separated by gravity, and the structure is simpler and the separation efficiency is higher.

[0473] Reference Fig.79 The material receiving mechanism 3 includes a material receiving body 31, which has an opening 310, a liquid outlet 311 and a receiving cavity 312 for receiving a 3D printed object, wherein the opening 310 is connected to the receiving cavity 312, and the liquid outlet 311 is connected to the receiving cavity 312. One or more 3D printed objects 8 are placed in the receiving cavity 312, and the excess printing materials can be separated individually or in large quantities at the same time. Furthermore, the material receiving mechanism 3 also includes a cover plate 32, which is arranged opposite to the opening 310, and the cover plate 32 is arranged on the material receiving body 31 to open or close the opening 310. The cover plate 32 can be connected to the material receiving body 31 by magnetic attraction or snap-on, which is not limited in the present disclosure.

[0474] It is understandable that, when the cover plate 32 is added, the cover plate 32 prevents the 3D printed object 8 from falling out of the material receiving mechanism 3 during the rotation process, thereby increasing the tilt angle range of the 3D printed object 8. Exemplarily, the material receiving mechanism 3 includes a net bag structure, the net bag can be made of metal material, the top of the net bag has an opening 310 and a cover plate 32, and the bottom and side walls of the net bag have multiple liquid outlets 311.

[0475] Reference Fig.80In some embodiments, the post-processing device further includes a temperature regulating mechanism 5, which is used to generate a dynamic temperature distribution and / or to regulate the temperature of the region where the 3D printed object 8 is located based on a pre-configured temperature control strategy to reduce the viscosity of the excess printing material 6. Specifically, the temperature regulating mechanism 5 regulates the regional temperature through one or more of the following: a quartz heating tube, a PTC heating source, an infrared heating source, a heated fluid, a heated gas, a heating plate, or a heat exchanger.

[0476] Specifically, the dynamic temperature distribution includes controlling the temperature of the area where the 3D printed object 8 is located to be maintained at a first temperature at least in a first time period, and controlling the temperature of the area where the 3D printed object 8 is located to be maintained at a second temperature at least in a second time period, and the first temperature is greater than or less than the second temperature.

[0477] It should be noted that the 3D printed object 8 in this embodiment is a solid or semi-solid polymer that has not undergone a curing process and is easily deformed if exposed to a high temperature environment for a long time. Through dynamic temperature control, the viscosity of the excess printing material can be reduced, while preventing the 3D printed object 8 from being deformed due to excessive temperature. For example, Fig.81 As shown in (a), the temperature of the control area is first high and then low, and the temperature of the area is increased in the time period 0-t1 to reduce the viscosity of the resin material and improve the separation efficiency of the resin material. Then, after t1, the temperature is reduced to avoid long-term heating causing excessive temperature and deformation of the 3D printed object 8; or Fig.81 As shown in (b), if the surface of the 3D printed object 8 is adhered to a lot of resin when it leaves the printing area, since the resin flows faster under the action of force when there is a lot of resin, a low temperature can be used in the time period 0-t1, and then the temperature of the area can be increased in the time period t1-t2 to reduce the viscosity of the resin material, and then the temperature can be lowered after t2 to avoid long-term heating. Fig.81 The regional temperatures in (a) and 81(b) represent the temperature setting values. Since the time of temperature change depends on the power of the heater / cooler, the process time of heating or cooling is not shown in the figure. The figure is an example of the set temperature. In specific applications, the heating process can be slow.

[0478] Specifically, the temperature control strategy includes one or more of the following: controlling the temperature of the area where the 3D printed object 8 is located to maintain within a preset temperature value range; or determining the temperature control parameters based on the material type and the pre-configured mapping relationship between the material type and the temperature control parameters.

[0479] For example, Fig.81As shown in (c), for some 3D printed objects 8 that are not easy to deform or have low precision requirements, the temperature of the area where the 3D printed object 8 is located can be controlled to maintain a preset temperature value range during the entire dripping process to improve the efficiency of separating excess printed materials. In some embodiments, a database can also be established based on the mapping relationship between the type of printed material and the temperature control parameter, and different temperature control parameters can be configured for different printed materials. The temperature control parameters include one or more of the heating start time, heating end time, heating duration, temperature setting value, heat dissipation or cooling time. For example, for materials with high viscosity, the following method can be used: Fig.81 (c) Full temperature control method.

[0480] In one embodiment, the post-processing device further includes a temperature sensor 54, which is used to detect the regional temperature or the ambient temperature; wherein the working state of the temperature regulating mechanism 5 is controlled based on the detection data of the temperature sensor 54. The temperature sensor 54 can be installed on the material receiving mechanism 3 or near the heat source 52, such as Fig.82 As shown. By detecting the regional temperature through the sensor, the temperature can be adjusted in real time for more accurate control of the regional temperature.

[0481] Reference Fig.82 , Fig.83 The temperature regulating mechanism 5 includes a heat source 52 and an air outlet component 51, and the heat source 52 and the air outlet component 51 are used to generate heated gas so that the 3D printed object 8 is in the heated gas. Among them, the air outlet component 51 has a plurality of air outlets, and the wind blowing area formed by the plurality of air outlets covers the 3D printed object 8; or the plurality of air outlets are moved so that the wind blowing area covers the 3D printed object 8. Exemplarily, the air outlet of the air outlet component 51 is arranged above the 3D printed object 8, and the heat source 52 is arranged at the air outlet. The air outlet component 51 includes a fan, a guide rail 53 and a driving member, and the driving member can drive the fan to move along the direction of the guide rail 53 so that the wind blowing area of ​​the fan covers the entire 3D printed object 8, such as Fig.82 Alternatively, multiple fans or fans with multiple air outlets are provided, in which case the wind blowing area of ​​the fans can completely cover the 3D printed object 8, and there is no need to move the fans. For example, two fans are provided to overlap and cover the 3D printed object 8, as shown in FIG. Fig.83As shown. It can be understood that in the present disclosure, the temperature of the area is controlled by heated gas, which can make the temperature distribution of the area where the 3D printed object 8 is located uniform, improve the efficiency of resin separation, and avoid deformation of the object caused by excessive temperature in some areas. In other embodiments, the air outlet of the air outlet component 51 can also be arranged on the side of the 3D printed object 8, and the heat source 52 can also be arranged on the side of the 3D printed object 8, and the present disclosure does not limit this. In other embodiments, the temperature adjustment mechanism 5 can also use a quartz heating tube, a PTC heating source, an infrared heating source, a heated fluid, a heated gas, a heating plate or a heat exchanger to adjust the regional temperature, and the present disclosure does not limit this.

[0482] In another embodiment, the post-processing device further includes an air outlet mechanism, which is used to generate flowing gas so that the 3D printed object 8 is placed in the flowing gas to accelerate the flow of the excess printing material 6. For example, a high-pressure air gun or a high-pressure air knife is used to blow out compressed air, and the force generated by the high-pressure airflow is used to accelerate the flow of the resin material to improve the separation efficiency.

[0483] In another embodiment, the post-processing device further includes a vibration mechanism, which is used to vibrate the 3D printed object 8 to accelerate the flow of excess printing material 6. For example, a vibrator is installed on the material receiving mechanism 3 to drive the material receiving mechanism 3 and the 3D printed object 8 to vibrate, and the flow of the resin material is accelerated by the vibration force to improve the separation efficiency.

[0484] In some embodiments, Fig.82 , Fig.83 As shown, the post-processing device further includes a material recovery container 7, which is used to collect at least a portion of the excess printing material 6. When the 3D printed object 8 leaves the printing area, a large amount of resin material will be taken out. By setting up the material recovery container 7 to recover the excess printing material, the recovered resin material can be used in subsequent 3D printing, thereby avoiding material waste and saving printing costs.

[0485] In another embodiment, a post-processing device for 3D printed objects includes a material receiving mechanism 3 for carrying a 3D printed object 8 with excess printing material 6; a movable mechanism 4 is used to set the 3D printed object 8 at a first dripping position in a first time period to separate the excess printing material 6 adhering to the 3D printed object 8; wherein the inclination angle of the 3D printed object 8 in the first dripping position is determined based on a preset angle value and / or a shape feature of the 3D printed object 8.

[0486] In this embodiment, after the receiving mechanism 3 carries the 3D printed object 8, the movable mechanism 4 moves the 3D printed object 8 to the first dripping position, for example Fig.75(a) The first dripping position. It should be noted that, for different 3D printed objects 8, the first dripping position may be different, and the movable mechanism 4 can make different 3D printed objects 8 be in different dripping positions. Exemplarily, for a certain type of 3D printed object 8, the preset angle value in the first dripping position is set based on an empirical value, such as 45°, that is, the inclination angle of the 3D printed object 8 is set at 45° for dripping.

[0487] Optionally, the process of determining the tilt angle in the first dripping position includes: determining the optimal dripping angle based on a preset angle matching model and the shape characteristics of the 3D printed object 8; and obtaining the tilt angle of the 3D printed object 8 in the first dripping position according to the optimal dripping angle. Exemplarily, a machine learning model is established, the shape data of the 3D printed object 8 and the corresponding historical angle data are input, and the optimal dripping angle corresponding to the 3D printed object 8 is automatically identified through machine learning. Among them, the optimal dripping angle refers to the angle that can make the dripping efficiency of the resin material in the 3D printed object 8 the highest or the amount of the resin material dripping the largest, such as the angle when the cup mouth in the inverted cup mouth structure faces downward.

[0488] Optionally, the first dripping position is a dripping position where the opening of the liquid accumulation area is downward; wherein the liquid accumulation area is formed by the structure of the 3D printed object itself. In a specific application, if the 3D printed object 8 has a liquid accumulation area 81 caused by a special structure, such as an inverted cu...

Claims

1. A system for three-dimensional printing, characterized in that: A post-processing device is included, wherein the post-processing device includes: A material receiving mechanism, comprising a material receiving body, wherein the material receiving body is configured to carry a 3D printed object with excess printing material; A driving mechanism is configured to allow the material receiving mechanism to rotate from a first state to a second state so that the excess printing material drips from the 3D printed object, wherein the 3D printed object has at least two different inclination angles.

2. The system according to claim 1, characterized in that The driving mechanism is configured to keep the material receiving mechanism in a first state for a first period of time.

3. The system according to claim 1, characterized in that The post-processing device further includes at least one of a temperature regulating mechanism, an air outlet mechanism, and a vibration mechanism; Among them, the temperature adjustment mechanism is used to generate dynamic temperature distribution and / or adjust the temperature of the area where the 3D printed object is located based on a pre-configured temperature control strategy; the air outlet mechanism is used to generate flowing gas so that the 3D printed object is placed in the flowing gas to accelerate the flow of excess printing material; the vibration mechanism is used to make the 3D printed object vibrate to accelerate the flow of excess printing material.

4. The system according to claim 1, characterized in that The system also includes a 3D printing device, which includes a molding platform, a material tray and a separation device. The molding platform has a molding surface, the molding surface is used to attach a 3D printed object, and the separation device is used to separate the 3D printed object from the molding surface.

5. The system according to claim 4, characterized in that The material receiving body is configured to allow movement between a first position and a second position. The material receiving body is configured to receive a 3D printed object with excess printing material separated from the molding surface at the first position, and to allow the material receiving body to rotate from the first state to the second state at the second position.

6. The system according to claim 4, characterized in that The system also includes a blanking component, which is configured to allow movement between a first position and a second position. In the first position, the blanking component is used to receive the 3D printed object separated from the molding surface. In the second position, the blanking component transfers the 3D printed object to the receiving body.

7. The system according to claim 1, characterized in that The material receiving body has an opening, a liquid outlet and a receiving cavity for receiving the 3D printed object, and the opening and the liquid outlet are both connected to the receiving cavity.

8. The system according to claim 1, characterized in that The driving mechanism further comprises a first transmission mechanism, which is drivingly connected to the material receiving body to drive the material receiving body to rotate around a transverse axis.

9. The system according to claim 1, characterized in that The material receiving mechanism further includes a material recovery container, which is configured to receive printing material from the material receiving body.

10. The system according to claim 9, characterized in that The material receiving mechanism also includes: a first liquid receiving container and a second liquid receiving container, wherein the first liquid receiving container is configured to receive printing materials from the material receiving body, and the second liquid receiving container is communicated with the first liquid receiving container and the material recovery container respectively; Optionally, a liquid receiving track is provided between the second liquid receiving container and the 3D printing device.

11. The system according to claim 10, characterized in that The 3D printing device also includes a pipeline for conveying printing material to the material tray, one end of the pipeline is connected to the material recovery container, and the other end is connected to the material tray.

12. The system according to claim 1, characterized in that The material receiving mechanism also includes a material receiving container, and the driving mechanism can rotate the material receiving body so that the 3D printed object moves out of the material receiving body and enters the material receiving container through an opening of the material receiving container.

13. The system according to claim 4, characterized in that The separation device includes a shovel mechanism, which includes: a mounting frame; a scraper, which is movably arranged on the mounting frame, and the scraper has an initial position relative to the mounting frame; and a shovel drive assembly, which is used to drive at least one of the scraper and the molding platform so that the scraper and the molding platform move relative to each other, so as to separate the 3D printed object from the molding surface by the scraper.

14. The system according to claim 13, characterized in that The shovel mechanism also includes a cleaning member, which is arranged on a side close to the shovel blade. When the shovel blade moves out from the initial position, one end of the cleaning member abuts against the surface of the shovel blade and slides along the surface of the shovel blade.

15. The system according to claim 14, characterized in that When the scraper is at the initial position, one end of the cleaning member protrudes from or is flush with the surface of the scraper; and / or When the scraper is located at the initial position, one end of the cleaning member is tilted toward a direction close to the scraper; and / or The scraper has a blade, and when the scraper is located at the initial position, the blade abuts against the side wall of the cleaning member; and / or One side surface of the scraper has an inclined surface, and the inclined surface extends to the end of the scraper, and when the scraper moves out from the initial position, the upper end of the cleaning member abuts against the inclined surface and slides along the inclined surface; and / or In the direction in which the scraper moves out from the initial position, the scraper is arranged to be inclined upward.

16. The system according to claim 13, characterized in that The shovel mechanism also includes a liquid receiving member, which is arranged on the mounting frame. The liquid receiving member has a liquid receiving port, and the liquid receiving port corresponds to at least one position of the scraper, so that the liquid receiving member receives the printing material adhered to the scraper.

17. The system according to claim 6, characterized in that The unloading component includes a receiving member and a unloading drive component, the receiving member is used to receive the 3D printed object separated from the forming platform at the first position, and the unloading drive component is configured to drive the receiving member from the second position to the first position along the receiving direction, and drive the receiving member from the first position to the second position along the feeding direction; the receiving member is provided with a drainage part, so that the printing material can be discharged from the receiving member through the drainage part during the receiving process.

18. The system according to claim 17, characterized in that The receiving member comprises a bottom plate and a side plate connected to the bottom plate, the bottom plate and the side plate form a receiving cavity for receiving a 3D printed object, and the liquid discharge portion is arranged on the bottom plate.

19. The system according to claim 18, characterized in that The liquid discharge portion has an outlet, and the outlet is vertically opposite to at least a portion of the opening of the material tray; and / or The receiving member further comprises a bearing plate arranged above the bottom plate, a liquid storage cavity is formed between the bottom plate and the bearing plate, and a plurality of liquid through holes are opened on the bearing plate.

20. The system according to claim 4, characterized in that The 3D printing device also includes a locking mechanism for the molding platform, and the locking mechanism includes: The locking member comprises a fixing frame, a fixing plate and a moving block, wherein the moving block is movably arranged on the fixing frame, the fixing plate has a mounting groove, and the mounting groove has an opening; A platform fixing piece, used for connecting with the molding platform, and the platform fixing piece can extend into the installation groove through the opening; The fixing plate has a first clamping portion, the first end of the platform fixing piece has a second clamping portion clamped with the first clamping portion, and the moving block has a locking position abutting against the second end of the platform fixing piece and an unlocking position separated from the second end of the platform fixing piece.

21. The system according to claim 20, characterized in that The first clamping portion includes a clamping groove, and the second clamping portion includes a wedge block. The wedge block extends into the clamping groove and is clamped and matched with the clamping groove.

22. The system according to claim 20, characterized in that The moving block has a first limiting slope, and the second end of the platform fixing member has a second limiting slope. When the moving block is located in the locking position, the first limiting slope abuts against the second limiting slope, and when the moving block is located in the unlocking position, the first limiting slope is separated from the second limiting slope.

23. The system according to claim 4, characterized in that The 3D printing device further includes a floating tray mechanism, and the floating tray mechanism includes: A base plate having a tray mounting groove, wherein the tray mounting groove is arranged on the base plate, and a side portion of the tray mounting groove has an opening for inserting a tray; A floating block is vertically and floatably disposed below the substrate. When the floating block floats upward, the upper end of the floating block can extend into the tray installation groove to abut against the tray. The locking assembly includes a driving member and a locking member, wherein the driving member and the locking member are arranged on one side of the substrate or the floating block, the driving member can drive the floating block to float; the locking member can keep the floating block floating to lock the material tray, or the locking member can keep the floating block sinking so that the material tray can be taken in and out of the opening.

24. The system according to claim 23, characterized in that The locking member includes an electromagnet and a magnetic attraction plate, one of which is arranged on the base plate, and the other of which is arranged on a side of the floating block away from the base plate. When the electromagnet is in a power-off state, the driving member drives the floating block to float up and the material tray can be taken in and put out from the opening; when the electromagnet is in a power-on state, the electromagnet can cooperate with the magnetic attraction plate by magnetic attraction so that the floating block can lock the material tray.

25. The system according to claim 23, characterized in that The floating block has a floating position and a sinking position. When the floating block is at the floating position, the floating block extends into the tray installation groove to abut against and lock the tray. When the floating block moves from the floating position to the sinking position, the floating block is separated from the tray. The locking member includes a movable member, which is movably arranged on the substrate. The movable member has a contact state with the floating block and a separation state with the floating block. When the movable member is in the contact state, the floating block is maintained at the sunken position. When the movable member is in the separation state, the driving member drives the floating block to move from the sunken position to the floating position.

26. The system according to claim 4, characterized in that The 3D printing device further includes a liquid adding mechanism, and the liquid adding mechanism includes: A liquid adding box, comprising an inner cavity and a liquid inlet and a liquid outlet communicated with the inner cavity; A liquid inlet pump, one end of which is connected to the liquid inlet port, and the other end of which is connected to the material supply container, and the liquid inlet pump is used to transport the printing material from the material supply container to the liquid adding box; A liquid outlet pump, one end of which is connected to the liquid outlet, and the other end of which is connected to the material tray of the 3D printer, and the liquid outlet pump is used to transport the printing material in the liquid adding box to the material tray of the 3D printer; A controller is in communication with the liquid inlet pump and the liquid outlet pump, and the controller is used to control the start or stop of the liquid inlet pump and the liquid outlet pump.

27. The system according to claim 26, characterized in that The liquid adding mechanism further comprises a collecting groove, and an overflow port is provided on the side wall of the liquid adding box. The collecting groove is located at one side of the liquid adding box and is arranged corresponding to the overflow port.

28. The system according to claim 27, characterized in that The liquid adding mechanism also includes a base, the liquid adding box and the collecting tank are both arranged on the base, the edge of the base is provided with a baffle extending upward, the upper edge of the baffle is higher than the notch of the collecting tank; and / or, a leakage sensor for detecting leakage is arranged in the collecting tank.

29. The system according to claim 4, characterized in that The system further includes a cloud, wherein the cloud is configured to: Acquire multiple three-dimensional models to be printed and user case information corresponding to the multiple three-dimensional models in the cloud; The cloud classifies the plurality of three-dimensional models based on the user case information to obtain a target three-dimensional model that matches a target user case; The cloud allocates the classified multiple target three-dimensional models to 3D printing equipment and / or post-processing equipment according to a preset production strategy to produce the three-dimensional models; wherein the production strategy includes setting the target three-dimensional models belonging to the same user case in the same production sequence.

30. The system according to claim 29, characterized in that The cloud is also configured to: The cloud determines case identifiers corresponding to the plurality of three-dimensional models according to the user case information; uses the case identifier indicated by the target user case information as the target case identifier; and determines a target three-dimensional model that matches the target case identifier among the case identifiers corresponding to the plurality of three-dimensional models, so as to obtain a target three-dimensional model that matches the target user case; or The cloud determines, according to the user case information, model upload times corresponding to the plurality of three-dimensional models; The 3D models uploaded within the same time interval are determined as target 3D models for the same user case.

31. The system according to claim 29, characterized in that After obtaining the target three-dimensional model matching the target user case, the cloud is further configured to: The cloud performs layout processing on the target three-dimensional models belonging to the target user cases respectively to obtain target layout results matching the target user cases; The cloud distributes the target layout result to a 3D printing device for three-dimensional printing.

32. The system according to claim 29, characterized in that The production sequence includes one or more printing copies, and the production strategy is configured as follows: The cloud sets the target three-dimensional models belonging to the same user case in the same print version for printing; or The cloud sets the target three-dimensional model belonging to the same user case in multiple printing versions, and sends the multiple printing versions to the same 3D printing device for printing; or The cloud sets the target three-dimensional model belonging to the same user case in multiple printing versions, and sends the multiple printing versions to different 3D printing devices for printing.

33. The system according to claim 29, characterized in that The production sequence includes one or more printing copies, and the production strategy is configured as follows: The cloud obtains the number of target three-dimensional models matching any user case, and when the number of models is greater than a first preset number, divides all the target three-dimensional models into multiple versions and sends them to the same 3D printing device for printing; or The cloud obtains an estimated printing time matching any user case, and when the estimated printing time is greater than a preset time, sends the unprinted target three-dimensional model corresponding to the user case to other 3D printing devices for printing; or The cloud obtains the working status of all 3D printing devices, and when a 3D printing device is in an idle state, sends the unprinted target three-dimensional model in the 3D printing device with the largest number of tasks to the idle 3D printing device for printing; or The cloud obtains the model quantity of the target three-dimensional model matching any user case, and when the model quantity is less than a second preset quantity, the target three-dimensional model and the target three-dimensional models of other user cases are arranged in the same edition and sent to the same 3D printing device for printing.

34. The system according to claim 29, characterized in that The production strategy is configured as: The cloud determines a production priority corresponding to the target user case information, and distributes the classified plurality of target three-dimensional models to a 3D printing device according to the order of the production priority to produce the three-dimensional models; and / or The cloud adjusts the production priority corresponding to the target user case information in response to the priority setting operation triggered by the user, obtains an updated production priority, and produces the three-dimensional model based on the updated production priority.

35. The system according to claim 29, characterized in that The 3D printing device comprises: A first controller is used to receive the classified multiple target three-dimensional models sent by the cloud, and user case information corresponding to the multiple target three-dimensional models respectively; A printing mechanism, used for performing three-dimensional printing based on the plurality of target three-dimensional models to form a plurality of 3D printed objects; The retrieval device is used to retrieve the multiple 3D printed objects based on a preset retrieval strategy after each version is printed; wherein the retrieval strategy includes placing the 3D printed objects belonging to the same user case in one or more storage containers.

36. The system according to claim 35, characterized in that The 3D printing device is also configured to: When there are more than two 3D printed objects corresponding to user cases in the same production sequence, the 3D printing device controls the motion parameters of the picking device of the 3D printing device according to the typesetting information, and after completing the picking of the 3D printed object of one user case, the 3D printed object of the next user case is picked up, so as to realize the picking of the 3D printed objects in the printing area in sequence.

37. The system according to claim 35, characterized in that The device for picking up items comprises: A material receiving assembly, the material receiving assembly comprising one or more receiving pieces, the receiving pieces being used to receive the 3D printed object; The material receiving component stores 3D printed objects belonging to the same user case in one or more of the storage components.

38. The system according to claim 37, characterized in that The material receiving assembly includes a conveying mechanism, and the conveying mechanism is used to drive the storage member to move to a material receiving position. When the storage member is located at the material receiving position, the 3D printed object enters the storage member through the mouth of the storage member.

39. The system according to claim 38, characterized in that The system further comprises a material unloading assembly, wherein the material unloading assembly is configured to allow movement between a first position and a second position, wherein in the first position, the material unloading assembly is used to receive the 3D printed object separated from the molding surface, and in the second position, the material unloading assembly transfers the 3D printed object to the material receiving body, and the driving mechanism is capable of rotating the material receiving body so that the 3D printed object is moved out of the material receiving body and enters the receiving member through the opening of the receiving member; or, The material receiving body is configured to allow movement between a first position and a second position. The material receiving body is configured to receive a 3D printed object with excess printing material separated from the molding surface at the first position, and to allow the material receiving body to rotate from a first state to a second state at the second position. The driving mechanism can rotate the material receiving body so that the 3D printed object moves out of the material receiving body and enters the storage member through the opening of the storage member.

40. The system of claim 38, wherein: The material receiving assembly further comprises a propping mechanism, and the propping mechanism is arranged at the end of the conveying mechanism; The expansion mechanism includes a first unit for driving a first end of the storage member and a second unit for driving an opposite second end of the storage member, wherein the first end of the storage member and the second end of the storage member can move relative to each other so that the mouth of the storage member can switch between an open state and a closed state.

41. The system according to claim 40, characterized in that The first unit includes a fixing mechanism, and the second unit includes a moving mechanism. The moving mechanism is movably arranged and has an initial position close to the fixing mechanism and a pulling position away from the fixing mechanism. When the storage piece moves to the material receiving position, the fixing mechanism fixes the first end of the mouth of the storage piece, and the moving mechanism is connected to the second end of the mouth of the storage piece and can pull the mouth of the storage piece open.

42. The system according to claim 38, characterized in that The storage piece is arranged on the conveying mechanism and is used to transport the storage piece to move in the vertical direction. The material receiving assembly also includes a sealing mechanism. The sealing mechanism is arranged below the conveying mechanism. The sealing mechanism has a avoidance position and a sealing position. The storage piece is located in the sealing mechanism. When the sealing mechanism moves from the avoidance position to the sealing position, the sealing mechanism seals the storage piece.

43. The system according to claim 42, characterized in that The conveying mechanism also includes a base frame and a guide cylinder, the guide cylinder is arranged on the base frame, the storage piece is sleeved on the guide cylinder, the conveying mechanism is arranged on the outside of the guide cylinder, and the sealing mechanism is located below the guide cylinder.

44. The system according to claim 43, characterized in that The conveying mechanism further includes a rolling member, which is arranged on the outer side of the guide cylinder and is in pressure contact with the receiving member. The rolling member rotates to move the receiving member.

45. The system according to claim 43, characterized in that The material receiving assembly further comprises a tightening assembly, which is arranged between the sealing mechanism and the guide cylinder, and comprises a first tightening member and a second tightening member which are arranged opposite to each other, and the first tightening member and the second tightening member can be relatively close to each other or can be far away from each other; The material receiving assembly further comprises a cutting assembly, which is arranged on a side of the tightening assembly away from the guide cylinder, and is used for cutting off the receiving piece between the two seals.

46. ​​The system of claim 38, wherein: The receiving member has a first receiving position and a second receiving position, and the conveying mechanism can drive the receiving member to move between the first receiving position and the second receiving position; When the receiving member is located at the first material receiving position, the separation device can allow the 3D printed object on the molding surface to enter the receiving member; When the storage member is located at the second material receiving position, the conveying mechanism clamps the storage member to prepare to place the storage member on the storage rack, or the conveying mechanism transfers the 3D printed object in the storage member to a container.

47. The system according to claim 46, characterized in that The conveying mechanism includes a sliding assembly, and the sliding assembly can drive the storage member to move between the first material receiving position and the second material receiving position.

48. The system according to claim 47, characterized in that The storage member comprises a storage box, and the storage box comprises a box body and a cover body used for opening and closing the box body, and a stopper is arranged on the cover body.

49. The system according to claim 48, characterized in that An opening is arranged on the side wall of the box body, the container is arranged on one side of the opening, and the sliding assembly is also used to transfer the three-dimensional model in the storage member to the container.

50. The system according to claim 49, characterized in that The material receiving assembly also includes a support frame, and the plurality of containers are movably arranged on the support frame. The sliding assembly can place the three-dimensional model in the storage box into at least one of the plurality of containers.

51. The system according to claim 49, characterized in that The storage boxes include multiple ones; the conveying mechanism includes a robot arm, which can clamp one of the multiple storage boxes and move it to the material receiving position. After packing the three-dimensional model in the storage box, the robot arm clamps the storage box and places the storage box on the storage rack.

52. A method for three-dimensional printing, characterized in that: include: Controlling the material receiving mechanism to carry the 3D printed object with excess printing material; The material receiving mechanism is rotated from a first state to a second state so that the excess printing material drips from the 3D printed object, wherein the 3D printed object has at least two different inclination angles.

53. The method according to claim 52, characterized in that The material receiving mechanism is maintained in a first state for a first period of time.

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