Feeding module and 3D printing equipment

Abstract

The invention belongs to the technical field of 3D printing, and discloses a feeding module and 3D printing device.The feeding module is used for the 3D printing device.The feeding module comprises a feeding shell, a plurality of workpieces and a working platform, the feeding shell is provided with a working cavity and a plurality of storage cavities, the multiple storage cavities are used for containing at least two printing materials, and the working platform is used for containing the multiple storage cavities; and the printing materials in the multiple storage cavities enter the working cavity after being mixed. The multiple working pieces are independently arranged and slidably matched in the multiple storage cavities in a one-to-one correspondence mode, each working piece can push printing materials in the corresponding storage cavity into the working cavity under independent driving of an external driving structure, and the working platform is slidably installed in the working cavity. And the printing material entering the working cavity can push the working platform to move. According to the feeding module, the mechanical performance of a printing material can be improved by improving the slurry viscosity of the printing material, and the color gradient or performance gradient effect of a printing model can be achieved by adjusting the feeding proportion of the storage cavity.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to a feeding module and a 3D printing device. Background Art

[0002] There are currently two ways to achieve gradient printing. The first type of 3D printer is designed with two printing resin tanks, each of which is filled with different resin slurries. The printing process is: the work platform first prints a layer in the first resin tank, and then wipes off the excess resin on the work platform to avoid mutual contamination of the two resins. Then the work platform prints the second layer in the second resin tank, and wipes off the excess resin on the work platform to avoid mutual contamination of the two resins. By adjusting the printing strategy, gradient printing of the same model and printing of different materials can be achieved. The main problems are: 1) Since the work platform needs to be wiped after each layer is printed, the printing efficiency is extremely low and the resin is wasted; 2) Since the resin slurry printed for each layer is different, layerless gradient cannot be achieved, and due to the different curing shrinkage rates of different types of slurries, cracking and other defects are prone to occur. The second type of 3D printer uses polymer jetting photocuring (PolyJet) technology. The printing principle is to use inkjet printing technology to spray photocurable polymer onto the working platform, and then irradiate the photocurable polymer on the working platform with ultraviolet light to solidify it. Multiple sets of nozzles can be installed on the printing equipment, and each set of nozzles can be different photocurable polymer materials, so that layer-free gradient printing can be achieved. The disadvantages are: 1) The nozzle is easy to clog, the life is short, and the replacement cost is high; 2) The nozzle has very high requirements for the viscosity of the photocurable polymer, which cannot be higher than 100mPa.s, otherwise printing cannot be achieved, and the lower viscosity will limit the improvement of the performance of the printed part. Summary of the invention

[0003] The first object of the present invention is to provide a feeding module, which can not only improve the mechanical properties by increasing the slurry viscosity of the printing material, but also achieve the color gradient or performance gradient effect of the printed model by adjusting the feeding ratio of the working chamber.

[0004] The second object of the present invention is to provide a 3D printing device, which can not only improve the mechanical properties by increasing the slurry viscosity of the printing material, but also achieve the color gradient or performance gradient effect of the printed model by adjusting the feed ratio of the working chamber.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] The present invention discloses a feeding module, which is used for 3D printing equipment. The feeding module comprises: a feeding shell, wherein the feeding shell has a working cavity and a plurality of storage cavities, wherein the bottom ends of the plurality of storage cavities are connected to the bottom end of the working cavity through a circulation channel, and the plurality of storage cavities are used to accommodate at least two printing materials; a plurality of working pieces, wherein the plurality of working pieces are independently arranged, and the plurality of working pieces are slidably matched in the plurality of storage cavities in a one-to-one correspondence, and each of the working pieces can push the printing material in the storage cavity into the working cavity under the independent drive of an external driving structure; a working platform, wherein the working platform is slidably installed in the working cavity along its axial direction, and the printing material entering the working cavity can push the working platform to move; wherein: curing light can pass through the bottom of the feeding shell to cure the printing material in the working cavity.

[0007] In some embodiments, the circulation channel includes a confluence channel and multiple branch channels, one end of the confluence channel is connected to the working chamber, and the other end is connected to one end of the multiple branch channels, and the other ends of the multiple branch channels are respectively connected to the multiple storage chambers one by one.

[0008] In some specific embodiments, the confluence channel includes a mixing channel and a plurality of connecting channels, one end of the mixing channel is connected to the plurality of branch channels, and the other end is connected to one end of the plurality of connecting channels, the other end of the plurality of connecting channels is connected to the working chamber, and the connecting openings of the plurality of connecting channels and the working chamber are distributed at intervals along the circumference of the working chamber.

[0009] In some more specific embodiments, the mixing channel has a plurality of flow branches, so that the printing materials in the plurality of communicating channels are mixed evenly and then enter the working chamber.

[0010] In some embodiments, the working platform is also provided with a gas channel connected to the working chamber, and a one-way valve is provided in the gas channel; wherein: after printing is completed, during the process of removing the working platform, the one-way valve allows external gas to enter the working chamber to avoid negative pressure in the working chamber.

[0011] In some embodiments, the upper portion of the working cavity has a limit groove and a guide groove connected to the limit groove, and the working platform is provided with a limit protrusion that cooperates with the limit groove. The limit protrusion has a limit position that is snapped into the limit groove and a movable position that is snapped into the guide groove. In the limit position, the working platform is limited in the working cavity, and in the movable position, the working platform can slide in the working cavity and cannot deflect in the working cavity.

[0012] The present invention also discloses a 3D printing device, comprising: a shell, the shell having an installation cavity and a support platform located above the installation cavity; the feeding module mentioned above, the feeding module is installed on the support platform; a driving device, the driving device is installed on the shell and is respectively connected to a plurality of the working pieces to drive the working pieces to move; a curing light machine, the curing light machine is installed in the installation cavity, and the curing light machine is used to emit curing light toward the working cavity to cure the printing material.

[0013] In some embodiments, the driving device includes a plurality of independently arranged driving units, and the plurality of driving units are arranged in one-to-one correspondence with the plurality of working pieces; or:

[0014] The driving device includes a driving source and a plurality of power output ends, and the plurality of power output ends are arranged in one-to-one correspondence with the plurality of working pieces.

[0015] In some embodiments, the 3D printing device further includes a QR code scanning device installed on the housing.

[0016] In some embodiments, the 3D printing device further includes a position detection device, which is mounted on the housing and is used to detect the position accuracy of the working platform.

[0017] The feeding module of the present invention has the following beneficial effects: since the feeding module feeds materials by extrusion injection through multiple working parts, on the one hand, the requirements of the 3D printing device on the fluidity and viscosity of the printing material can be reduced, and the printing material can passively flow through pressure in the working chamber to achieve rapid material replenishment, thereby improving the mechanical properties of the printing material by increasing the viscosity, and the time for natural reflux replenishment is saved by extrusion feeding, thereby improving the printing efficiency and achieving rapid printing; on the other hand, by controlling the movement states of multiple working parts, multiple printing materials can be mixed in a certain proportion and then enter the working chamber for model printing, so that the 3D printing device can print models with a single color or performance, as well as models with gradient colors or gradient performance, thereby expanding the scope of application of the 3D printing device.

[0018] The beneficial effects of the 3D printing device of the present invention are that, due to the feeding module described above, on the one hand, the requirements of the 3D printing device on the fluidity and viscosity of the printing material are reduced, and the mechanical properties of the printing material are improved by increasing the viscosity, and the time for natural reflux and replenishment of the material is saved by extrusion feeding, thereby improving the printing efficiency and achieving fast printing; on the other hand, the 3D printing device can print models with a single color or performance, as well as models with gradient colors or gradient performance, and has a wide range of applications.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of the feeding module of the embodiment of the present invention in a non-working state.

[0021] Figure 2 This is a schematic diagram of the structure of the feeding module of the embodiment of the present invention in the working state

[0022] Figure 3 yes Figure 2 A top view of the feeding module shown;

[0023] Figure 4 yes Figure 2 A transverse cross-sectional view of the feeding module shown;

[0024] Figure 5 yes Figure 2 A vertical cross-sectional view of the feed module shown;

[0025] Figure 6 is a schematic diagram of the bottom structure of a feeding module according to an embodiment of the present invention;

[0026] Figure 7 is a cross-sectional view of a feeding shell of a feeding module according to an embodiment of the present invention;

[0027] Figure 8 is a schematic structural diagram of a 3D printing device according to an embodiment of the present invention;

[0028] Fig. 9 is a cross-sectional view of the 3D printing device of an embodiment of the present invention when starting printing;

[0029] Fig.10 is a cross-sectional view of the 3D printing device of the embodiment of the present invention when printing is completed;

[0030] Fig.11 is a schematic structural diagram of a 3D printing device according to an embodiment of the present invention with its housing removed;

[0031] Fig.12 is a schematic structural diagram of a driving device of a 3D printing device according to an embodiment of the present invention;

[0032] Fig.13 is a schematic structural diagram of a position detection device for a 3D printing device according to an embodiment of the present invention;

[0033] Fig.14 is a schematic diagram of the exploded structure of a support platform of a 3D printing device according to an embodiment of the present invention;

[0034] Fig.15 is a schematic diagram of the exploded structure of a locking assembly according to an embodiment of the present invention;

[0035] Fig.16 It is a schematic structural diagram of a locking assembly according to an embodiment of the present invention.

[0036] Reference numerals:

[0037] 1. Feeding module; 11. Feeding shell; 111. Shell body; 1111. Storage chamber; 1112. Working chamber; 1113. Converging channel; 11131. Mixing channel; 11132. Connecting channel; 1114. Branching channel; 1115. Limiting groove; 1116. Guide groove; 1117. Chassis; 112. Shell bottom cover; 1121. Clamping part; 113. Sealing assembly; 114. Shading film; 1141. Avoidance hole; 12. Working piece; 13. Working platform; 131. Limiting protrusion; 132. Gas channel; 133. Chamfer; 14. One-way valve; 15. First sealing member; 16. Second sealing member;

[0038] 2. Shell; 21. Support platform; 211. Positioning groove; 212. Perforation; 22. First shell; 23. Second shell;

[0039] 3. Driving device; 31. Driving unit;

[0040] 311, driving bracket; 312, driving motor; 313, photoelectric switch; 314, driving screw; 315, driving nut; 316, connecting block; 317, clamping block; 3171, clamping groove;

[0041] 4. Curing light machine;

[0042] 5. Lock assembly; 51. Lock base; 511. Rotation slot; 52. Lock body; 53. Elastic member; 54. Lock sealing plate;

[0043] 6. Locking assembly; 61. Locking base; 62. Locking member; 63. Operating member;

[0044] 7. QR code scanning device;

[0045] 8. Position detection device; 81. Detection bracket; 811. Vertical bracket; 812. Horizontal bracket; 8121. Wiring trough; 813. Sealing cover; 82. Detection box; 821. Detection box body; 822. Detection cover body; 823. Sealing bracket; 83. Displacement sensor; 9. Control mechanism. DETAILED DESCRIPTION

[0046] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are only used to explain the present invention, not to limit the present invention. It should also be noted that, for the convenience of description, only parts of the present invention, not all structures, are shown in the accompanying drawings. In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in specific circumstances. In the present invention, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature can include the first and second features directly contacting, and can also include the first and second features not being in direct contact but contacting through another feature between them. Moreover, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being “below,” “beneath,” and “below” the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature is at a smaller horizontal height than the second feature.

[0047] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0048] Reference below Figure 1-Figure 7 The specific structure of the feeding module 1 according to the embodiment of the present invention is described.

[0049] The present invention discloses a feeding module, the feeding module 1 is used for 3D printing equipment, referring to Figure 1 and Figure 2As shown, the feeding module 1 includes a feeding shell 11, multiple working pieces 12 and a working platform 13. The feeding shell 11 has a working chamber 1112 and multiple storage chambers 1111. The bottom ends of the multiple storage chambers 1111 are connected to the bottom end of the working chamber 1112 through circulation channels. The multiple storage chambers 1111 are used to accommodate at least two printing materials. The multiple working pieces 12 are independently arranged. The multiple working pieces 12 are slidably matched in the multiple storage chambers 1111 in a one-to-one correspondence. Each working piece 12 can push the printing material in the storage chamber 1111 into the working chamber 1112 under the independent drive of an external driving structure. The working platform 13 can be slidably installed in the working chamber 1112. The printing material entering the working chamber 1112 can push the working platform 13 to move. The curing light can pass through the bottom of the feeding shell 11 to cure the printing material in the working chamber 1112. It can be understood that in the actual working process, since the multiple storage chambers 1111 are connected to the bottom of the working chamber 1112, the printing material can be transported from the storage chamber 1111 to the working chamber 1112. In the initial state, the storage chamber 1111 is full of printing materials, and the working piece 12 is at the upper end of the printing material. In the initial state of the working chamber 1112, the printer is at the bottom of the working chamber 1112, and the bottom of the working chamber 1112 can pass through the curing light. During printing, the external driving structure applies pressure to the working pieces 12 of the multiple storage chambers 1111. The multiple working pieces 12 can move synchronously or at different speeds according to actual needs, so that the printing materials in the multiple storage chambers 1111 are squeezed and injected out of the working chamber 1112 under the pressure of the working piece 12, enter the circulation channel, and enter the working chamber 1112 after being fully mixed in the circulation channel, and the working platform 13 matched in the working chamber 1112 is raised by a printing layer thickness, and then the curing light machine 4 of the 3D printing device is started for exposure, and the curing light passes through the feed shell The bottom of the body 11 solidifies the printing material in the working chamber 1112 to complete the first layer of printing; the first layer of printing material is solidified at the bottom of the working platform 13, and then the external driving structure is started again to apply pressure to the workpiece 12, and the working platform 13 in the working chamber 1112 is raised again by a printing layer thickness, and then the curing light machine 4 is started for exposure to complete the second layer of printing; and so on, finally completing the printing of all layers of the slice file, and finally pulling the working platform 13 out of the working chamber 1112 to see the printed model, and then taking the printed model out from the end of the working platform 13.Therefore, the feeding module 1 of the present invention feeds materials by extrusion injection through multiple working pieces 12. On the one hand, it can reduce the requirements of the 3D printing device for the fluidity and viscosity of the printing material. The printing material can passively flow through pressure in the working chamber 1112 to achieve rapid material replenishment, thereby improving the mechanical properties of the printing material by increasing the viscosity, and saving the time of natural reflux replenishment by extrusion feeding, improving printing efficiency, and achieving rapid printing; on the other hand, by controlling the movement state of multiple working pieces 12, multiple printing materials can be mixed in a certain proportion and then enter the working chamber 1112 for model printing, so that the 3D printing device can print models with a single color or performance, as well as models with gradual color changes or gradual performance changes, expanding the scope of application of the 3D printing device. It should be additionally noted that the high-viscosity printing material encapsulated in the storage chamber 1111 helps to maintain the stability of the printing material and avoid precipitation.

[0050] It should be supplemented that, in the actual printing process, two or more work pieces 12 can move under the independent drive or unified drive of the external driving structure, and the specific movement mode is determined by the printing strategy of the 3D printing device.

[0051] refer to Figure 4 As shown, the bottom wall of the feeding housing 11 is provided with a confluence channel 1113 and a plurality of branch channels 1114, one end of the confluence channel 1113 is connected to the working chamber 1112, and the other end is connected to one end of the plurality of branch channels 1114, and the other ends of the plurality of branch channels 1114 are connected to the plurality of storage chambers 1111 in a one-to-one correspondence. It can be understood that in the actual working process, the printing material in each storage chamber 1111 enters the branch channel 1114 under the extrusion of the working piece 12, and the printing material in the plurality of branch channels 1114 enters the working chamber 1112 after being mixed in the confluence channel 1113, thereby completing the feeding. The plurality of branch channels 1114 can ensure that the printing materials in the plurality of storage chambers 1111 flow out stably, and the confluence channel 1113 can ensure that the printing materials in the plurality of branch channels 1114 are fully mixed, thereby ensuring that the printing materials entering the working chamber 1112 are relatively uniform, which is conducive to improving the printing quality.

[0052] Further optional, refer to Figure 4As shown, the confluence channel 1113 includes a mixing channel 11131 and a plurality of connecting channels 11132. One end of the mixing channel 11131 is connected to a plurality of branch channels 1114, and the other end is connected to one end of a plurality of connecting channels 11132. The other end of the plurality of connecting channels 11132 is connected to the working chamber 1112, and the connecting openings of the plurality of connecting channels 11132 and the working chamber 1112 are distributed at intervals along the circumference of the working chamber 1112. It can be understood that after the printing materials in the plurality of branch channels 1114 enter the mixing channel 11131, they enter the plurality of connecting channels 11132. Since the connecting openings of the plurality of connecting channels 11132 and the working chamber 1112 are distributed at intervals along the circumference of the working chamber 1112, during the printing process, the printing materials can enter the working chamber 1112 from a plurality of directions distributed at intervals along the circumference of the working chamber 1112, ensuring that the printing materials enter the working chamber 1112 uniformly along the circumference of the working chamber 1112, which is conducive to improving the printing quality.

[0053] In this embodiment, there are three communication ports, and the angle between each two adjacent communication ports is 120°. Of course, in other embodiments of the present invention, the communication channels 11132 can also be selected in other numbers and other distribution modes according to actual needs, and are not limited to the above limitations.

[0054] Further optionally, the mixing channel 11131 is a one-way circulation channel, and the one-way circulation channel can block the printing material in the connecting channel 11132 from entering the mixing channel 11131. On the one hand, it can ensure that the printing material quickly and evenly enters the multiple connecting channels 11132, and on the other hand, it can avoid the backflow of the printing material, thereby ensuring the normal progress of the printing process. Further optionally, the mixing channel 11131 has multiple circulation branches, so that the printing materials in the multiple connecting channels 11132 are mixed evenly and then enter the working chamber 1112. Further optionally, the mixing channel 11131 is a Tesla valve channel. It can be understood that the Tesla valve channel has the characteristics of one-way rapid circulation. Using the Tesla valve channel as the mixing channel 11131, on the one hand, it can ensure that the printing material quickly enters the multiple connecting channels 11132, and on the other hand, it can avoid the backflow of the printing material, thereby ensuring the normal progress of the printing process.

[0055] refer to Figure 5 As shown, a chamfer 133 is provided at the lower end of the working platform 13, and the chamfer 133 can increase the thrust received by the working platform 13 during the printing process, thereby ensuring that the working platform 13 can rise stably.

[0056] refer to Figure 5As shown, the working platform 13 is also provided with a gas channel 132 communicating with the working chamber 1112, and a one-way valve 14 is provided in the gas channel 132, and the one-way valve 14 is used to prevent the printing material from entering the gas channel 132. In addition, after printing is completed, in the process of taking out the working platform 13, the one-way valve 14 allows external gas to enter the working chamber 1112 to avoid negative pressure in the working chamber 1112. The working platform 13 is also provided with a gas channel 132 communicating with the working chamber 1112, and a one-way valve 14 is provided in the gas channel 132, and the one-way valve 14 is used to prevent the printing material from entering the gas channel 132. It can be understood that the one-way valve 14 is arranged on the working platform 13, which can not only prevent the liquid in the working chamber 1112 from overflowing from the one-way valve 14 into the gas channel 132, but also ensure that the atmosphere can smoothly enter the working chamber 1112 when the feeding module 1 is removed from the 3D printing device after printing is completed, and then the working platform 13 is pulled up to ensure the balance of internal and external air pressures, and the working platform 13 can be smoothly pulled out of the working chamber 1112, thereby facilitating the user to take out the printed model.

[0057] It should be noted that the gas channel 132 may be a vertical channel extending along the axial direction of the working platform 13 , or may be designed into other shapes according to actual needs, such as a tapered channel, a curved channel, etc.

[0058] Further optionally, the one-way valve 14 can be an automatic valve or a manual valve, and the specific type can be selected according to actual needs. When the one-way valve 14 is an automatic valve, the one-way valve 14 automatically opens after the 3D printing device detects that the printing is completed; after the one-way valve 14 is opened, the user can pull out the working platform 13 from the working chamber 1112; when the one-way valve 14 is a manual valve, the user manually opens the one-way valve 14 after the printing is completed, and then pulls out the working platform 13 from the working chamber 1112. Of course, in other embodiments of the present invention, a normally closed solenoid valve can be directly set in the gas channel 132. In the actual working process, the normally closed solenoid valve is opened and closed according to the actual printing needs, so that the printing material can be blocked from entering the gas channel 132 during the printing process, and the air can be ensured to enter the closed working chamber 1112 after the printing is completed, so as to balance the internal and external air pressures and facilitate the pulling out of the working platform 13.

[0059] refer to Figure 5 As shown, the working piece 12 is sleeved with at least two first sealing members 15, and the first sealing members 15 are used to achieve a sealed connection between the working piece 12 and the storage cavity 1111. It can be understood that the first sealing members 15 are sleeved on the working piece 12, and the outer side wall of the first sealing member 15 stops against the inner side wall of the storage cavity 1111. The additional first sealing members 15 can ensure that the printing material will not leak from the matching gap between the working piece 12 and the storage cavity 1111, thereby ensuring stable material supply during the printing process.

[0060] Further optionally, the first sealing member 15 is sleeved on the lower end of the working member 12. It is understandable that in the actual working process, the working member 12 will gradually drop. The first sealing member 15 is sleeved on the lower end of the working member 12, which can ensure that the first sealing member 15 is always in the storage cavity 1111 during the entire printing process, thereby further ensuring the sealing of the connection between the working member 12 and the storage cavity 1111. In this embodiment, the first sealing member 15 is a sealing ring, the number of which is two, and is spaced apart and arranged at the lower end of the working member 12. Of course, in other embodiments of the present invention, the model and number of the first sealing member 15 can be selected according to actual needs.

[0061] refer to Figure 5 As shown, the working platform 13 is sleeved with at least two second seals 16, and the second seals 16 are used to achieve a sealed connection between the working platform 13 and the working chamber 1112. It can be understood that the second seals 16 are sleeved on the working platform 13, and the outer side wall of the second seal 16 stops at the inner side wall of the working chamber 1112. The additional second seals 16 can ensure that the printing material will not leak from the matching gap between the working platform 13 and the working chamber 1112, thereby ensuring stable printing during the printing process.

[0062] Further optionally, at least two second seals 16 are respectively sleeved at both ends of the working platform 13. It can be understood that in the actual working process, the working platform 13 will gradually rise, and the printing material in the working chamber 1112 will gradually increase. The two second seals 16 are respectively arranged at both ends of the working platform 13, which can ensure the sealing performance of the working chamber 1112 during the entire printing process, thereby further ensuring the sealing of the connection between the working platform 13 and the working chamber 1112. In this embodiment, the second seal 16 is a sealing ring, and the number is two. The two second seals 16 are respectively arranged at both ends of the working platform 13. Of course, in other embodiments of the present invention, the model and number of the second seal 16 can be selected according to actual needs.

[0063] refer to Figure 1-Figure 3 As shown, the upper portion of the working chamber 1112 has a limiting groove 1115 and a guide groove 1116 connected to the limiting groove 1115, and the working platform 13 is provided with a limiting protrusion 131 matched with the limiting groove 1115. The limiting protrusion 131 has a limiting position for snapping into the limiting groove 1115 and an active position for snapping into the guide groove 1116. In the limiting position ( Figure 1 The working platform 13 is limited in the working chamber 1112, and in the active position ( Figure 21112, the working platform 13 can slide in the working chamber 1112 and cannot deflect in the working chamber 1112. It is understandable that when the feeding module 1 is in a non-printing state, if the working platform 13 is accidentally touched and moves, the printing material in the storage chamber 1111 will flow into the working chamber 1112, thereby causing the feeding module 1 to fail. In this embodiment, by providing a limiting groove 1115 and a guide groove 1116 on the upper part of the working chamber 1112, when the feeding module 1 is in a non-working state, the working platform 13 is rotated so that the limiting protrusion 131 is inserted into the limiting groove 1115 from the guide groove 1116. Due to the limiting effect of the limiting groove 1115, the working platform 13 will not move even if it is accidentally touched, thereby ensuring the storage reliability of the feeding module 1. When the feeding module 1 needs to work, the working platform 13 is rotated so that the limiting protrusion 131 is inserted into the guide groove 1116 from the limiting groove 1115, and the working platform 13 can slide normally along its axial direction and due to the guiding effect of the guide groove 1116, the working platform 13 will not deflect, thereby ensuring the normal progress of the printing process.

[0064] Further optional, refer to Figure 3 As shown, both sides of the working platform 13 that are arranged opposite to each other are provided with limiting protrusions 131, and the inner side wall of the working chamber 1112 is provided with two arc grooves, each arc groove constitutes a limiting groove 1115, and the limiting protrusion 131 is matched in the limiting groove 1115. Thus, the stability of the working platform 13 in the non-working state can be ensured by the cooperation of the two groups of limiting grooves 1115 and the limiting protrusions 131, and the storage reliability of the feeding module 1 is further improved. Of course, in other embodiments of the present invention, the number of limiting protrusions 131 can also be multiple (greater than two), and the inner side wall of the working chamber 1112 is provided with multiple limiting grooves 1115, and the multiple limiting protrusions 131 are evenly spaced and distributed along the circumference of the working platform 13, and the multiple limiting grooves 1115 and the multiple limiting protrusions 131 are arranged one by one.

[0065] refer to Figure 5 As shown, the feed housing 11 includes a housing body 111, a housing bottom cover 112 and a sealing assembly 113. The housing body 111 defines a storage cavity 1111 and a working cavity 1112. Both ends of the storage cavity 1111 and the working cavity 1112 are open, and the bottom wall of the housing body 111 is formed with the aforementioned converging channel 1113 and a plurality of branch channels 1114. The housing bottom cover 112 is buckled on the bottom wall of the housing body 111 to seal the bottom of the storage cavity 1111 and the working cavity 1112, and the sealing assembly 113 is sandwiched between the housing body 111 and the housing bottom cover 112; wherein: the curing light can pass through the housing bottom cover 112 to cure the printing material in the working cavity 1112.

[0066] It is understandable that the feed housing 11 is split into two parts, the shell body 111 and the shell bottom cover 112, which is convenient for assembly and production, and the shell body 111 can be made of opaque materials, and the shell bottom cover 112 can be made of translucent materials, so that during the printing process, the curing light can only pass through the shell bottom cover 112 to cure the printing material in the working chamber 1112, avoiding the printing failure caused by the curing light irradiating the working chamber 1112 or the storage chamber 1111 from other directions to cure the printing material, ensuring that the printing process can be carried out stably, which is conducive to improving the working reliability of the feed module 1. The additional sealing component 113 can ensure the connection sealing between the shell body 111 and the shell bottom cover 112, thereby avoiding the phenomenon of leakage of printing material from the matching gap between the shell body 111 and the shell bottom cover 112.

[0067] Further optional, refer to Figure 5 As shown, the shell bottom cover 112 has a snap-fit ​​portion 1121, the shell body 111 is provided with a chassis portion 1117, and the snap-fit ​​portion 1121 is connected to the chassis portion 1117 by snap-fit ​​connection. The snap-fit ​​connection can facilitate the connection between the shell body 111 and the shell bottom cover 112, without the need for a connector, which is conducive to improving the assembly efficiency of the feeding shell 11. Of course, in other embodiments of the present invention, the shell body 111 and the shell bottom cover 112 can also be detachably connected by connectors such as screws and rivets, or can be non-detachably connected by bonding or the like.

[0068] Further optionally, the sealing assembly 113 includes a feed sealing ring sleeved on the clamping portion 1121 and a feed sealing gasket clamped between the shell bottom cover 112 and the shell body 111. It can be understood that through the practical cooperation of the feed sealing ring and the feed sealing gasket, two sealing structures can be formed between the shell bottom cover 112 and the shell body 111, thereby improving the connection sealing between the shell bottom cover 112 and the shell body 111, thereby further avoiding the leakage of printing materials from the matching gap between the shell body 111 and the shell bottom cover 112. In the embodiment of the present invention, the specific material and sealing level of the feed sealing ring and the feed sealing gasket can be selected according to actual needs, and the specific parameters of the feed sealing ring and the feed sealing gasket are not limited here.

[0069] Further optional, refer to Figure 6As shown, the feeding shell 11 further includes a light shielding film 114, which is attached to the side of the shell bottom cover 112 away from the shell body 111, and the light shielding film 114 is provided with an avoidance hole 1141 corresponding to the working cavity 1112. It can be understood that the additional light shielding film 114 can shield the part of the shell bottom cover 112 corresponding to the storage cavity 1111, and expose the part corresponding to the working cavity 1112 through the avoidance hole 1141, which can ensure that the curing light can stably pass through the shell bottom cover 112 to cure the printing material in the working cavity 1112, and can also prevent the curing light from irradiating the storage cavity 1111 to cure the printing material, thereby ensuring the stable printing process.

[0070] Further optionally, a tearable light shielding sheet (not shown) is provided on the avoidance hole 1141. It is understandable that when the feeding module 1 is not in operation, the light shielding sheet can shield the avoidance hole 1141, so that the light shielding film 114 and the light shielding sheet can prevent light from entering the working cavity 1112 and the storage cavity 1111, and prevent the printing material from solidifying and causing the feeding module 1 to be unusable. When the feeding module 1 needs to print, it only needs to tear off the light shielding sheet, and then install the feeding module 1 on the 3D printing device, which is very convenient to use.

[0071] The advantages of the feeding module 1 of this embodiment are as follows:

[0072] First, there are two or more storage chambers 1111, and the printing materials in the storage chambers 1111 can be different, so that the printing materials in the multiple storage chambers 1111 are fully mixed in a certain proportion and then supplied to the working chamber 1112 for printing, thereby achieving a gradual change effect of the color or performance of the printed model or both the color and the performance;

[0073] Second: relying on the feeding method of extrusion injection of the workpiece 12, it is possible to print high-viscosity slurry, thereby greatly improving the mechanical properties of the work platform 13;

[0074] Third: relying on the feeding method of extrusion injection of the workpiece 12, the liquid pressure is used to realize the rise of the working platform 13, realize the printing release, and complete the material replenishment at the same time, which saves the time of waiting for the material liquid to return and replenish the material in the traditional printing method, and improves the printing speed;

[0075] Fourth: A one-way valve 14 is designed on the piston of the working platform 13. The one-way valve 14 is not conductive during the printing process. When the working platform 13 is pulled out after printing is completed, the one-way valve 14 opens, and air enters the closed working chamber 1112 to balance the internal and external atmospheric pressures, thereby preventing the working platform 13 from being difficult to pull out due to negative pressure.

[0076] Fifth: The high-viscosity printing material encapsulated in the storage cavity 1111 helps maintain the stability of the slurry and avoids precipitation, thereby facilitating improved printing accuracy.

[0077] Reference below Figure 8-Figure 16 The specific structure of the 3D printing device according to the embodiment of the present invention is described.

[0078] The present invention also discloses a 3D printing device, referring to Figure 8 As shown, the 3D printing device includes a housing 2, the aforementioned feeding module 1, a driving device 3 and a curing light machine 4. The housing 2 has a mounting cavity and a support platform 21 located above the mounting cavity. The feeding module 1 is mounted on the support platform 21. The driving device 3 is mounted on the housing 2 and is respectively connected to a plurality of working pieces 12 to drive the working pieces 12 to move. The curing light machine 4 is mounted in the mounting cavity, and the curing light machine 4 is used to emit curing light toward the working cavity 1112 to cure the printing material. It can be understood that since the 3D printing device includes the aforementioned feeding module 1, before printing begins, the light blocking sheet pasted on the light shielding film 114 is torn off, and then the feeding module 1 is mounted on the housing 2, and then the working platform 13 is rotated so that the limiting protrusion 131 is disengaged from the limiting groove 1115 and inserted into the guide groove 1116. The structure after the preparation work is completed is as shown in FIG. Fig. 9 As shown, the driving device 3 and the curing light machine 4 are then started to start printing. During the printing process, the driving device 3 applies pressure to the multiple workpieces 12, so that the printing materials in the multiple storage chambers 1111 are squeezed and injected out of the working chamber 1112 under the pressure of the workpiece 12, and enter the circulation channel. After being fully mixed in the circulation channel, they enter the working chamber 1112 and push the working platform 13 of the working chamber 1112 up by a printing layer thickness. Then the curing light machine 4 is exposed, and the curing light passes through the bottom of the feeding shell 11 to solidify the printing material in the working chamber 1112 to complete the first layer of printing; the first layer of printing material is solidified at the bottom of the working platform 13, and then the driving device 3 is started again to apply pressure to the workpiece 12, and the working platform 13 of the working chamber 1112 is pushed up by a printing layer thickness again, and then the curing light machine 4 is started for exposure to complete the second layer of printing; and so on, all layers of the slice file are finally printed. The printed structure is as shown in FIG. Fig.10 shown.

[0079] Therefore, due to the feeding module 1 mentioned above, on the one hand, the requirements of the 3D printing device for the fluidity and viscosity of the printing material can be reduced. The printing material can passively flow through pressure in the working chamber 1112 to achieve rapid material replenishment, thereby improving the mechanical properties of the printing material by increasing the viscosity, and saving the time for natural reflux replenishment by extrusion feeding, thereby improving printing efficiency and achieving rapid printing; on the other hand, by controlling the movement state of multiple working parts 12, multiple printing materials can be mixed in a certain proportion and then enter the working chamber 1112 for model printing, so that the 3D printing device can print models with a single color or performance, as well as models with gradient colors or gradient performance, thereby expanding the scope of application of the 3D printing device.

[0080] It should be noted that, in the embodiment of the present invention, the curing light machine 4 can be a SLA (Stereolithography Appearance) light machine, whose working principle is to use laser to irradiate liquid resin to solidify it layer by layer; it can also be a DLP (Digital Light Processing) light machine, whose working principle is to use a projector to project an image onto liquid resin to build an object layer by layer; it can also be an LCD (Liquid Crystal Display) light machine, whose principle is that light passes through the liquid crystal display screen according to the realization of the liquid crystal unit to transmit or block the light so as to project a specific image onto the liquid resin to build an object layer by layer. Of course, the specific type of the curing light machine 4 can also be selected according to actual conditions and is not limited to the above limitations.

[0081] refer to Figure 8 As shown, the housing 2 includes a first shell 22, a support platform 21, and a second shell 23. The first shell 22 is installed above the support platform 21, the second shell 23 is installed below the support platform 21, the drive device 3 is installed in the first shell 22, and the second shell 23 defines an installation cavity for accommodating the curing light machine 4. It can be understood that the drive device 3 is installed in the first shell 22, and the curing light machine 4 and the control mainboard of the entire 3D printing device are installed in the second shell 23, which can provide good protection for the drive device 3, the curing light machine 4 and the control mainboard, reduce the failure rate of the drive device 3, the curing light machine 4 and the control mainboard, and thus improve the working reliability of the 3D printing device.

[0082] refer to Fig.11As shown, the 3D printing device also includes a QR code scanning device 7 installed on the second shell 23. It can be understood that in the actual working process, the QR code information of the printing material can be affixed to the feeding shell 11 of the feeding module 1. Before the feeding module 1 is installed on the supporting platform 21, the QR code scanning device 7 is used to scan the code first, and the information of the printing material is entered into the 3D printing device, and then printing can be performed. In this way, different printing materials can be selected for printing according to actual needs.

[0083] refer to Figure 8 As shown, the driving device 3 includes a plurality of independently arranged driving units 31, and the plurality of driving units 31 are arranged one-to-one corresponding to the plurality of work pieces 12. It can be understood that in the actual working process, the plurality of work pieces 12 are driven by the plurality of independent driving units 31, and the driving states of the plurality of driving units 31 can be conveniently adjusted according to different printing strategies, thereby conveniently realizing the printing of models with different performances.

[0084] Optional, reference Fig.12 As shown, each driving unit 31 includes a driving bracket 311, a driving motor 312, a driving screw 314 and a driving nut 315. The driving bracket 311 is installed inside the first shell 22, the driving motor 312 is installed inside the first shell 22, the two ends of the driving screw 314 are rotatably connected to the driving bracket 311, and one end of the driving screw 314 is connected to the driving shaft of the driving motor 312, and the driving nut 315 is matched with the driving screw 314. A connecting block 316 is provided on the driving nut 315, one end of the connecting block 316 extends out of the first shell 22, and the end of the connecting block 316 extending out of the first shell 22 is provided with a clamping block 317 that cooperates with the working piece 12. It can be understood that in the actual installation process, after the feeding module 1 is installed on the supporting platform 21, the upper ends of multiple working pieces 12 are correspondingly clamped into the clamping grooves 3171 of multiple clamping blocks 317 to complete the connection. During the printing process, the driving motor 312 drives the lead screw 314 to rotate. During the rotation of the lead screw 314, the driving nut 315 can move along the axial direction of the driving lead screw 314, thereby driving the connection block 316 and the clamping block 317 to rise and fall, thereby driving a work piece 12. The structure of driving the lead screw 314 and the driving nut 315 is used to drive the work piece 12 to move, and the movement stroke of the working platform 13 can be accurately controlled, thereby ensuring that during the printing process, each movement of the work piece 12 can output a printing material with a printing layer thickness into the working chamber 1112.

[0085] Optionally, the driving bracket 311 is further provided with a photoelectric switch 313, which can detect the position of the driving nut 315. Therefore, in the actual working process, a zeroing operation can be performed according to the position of the driving nut 315 before printing starts, thereby ensuring printing accuracy.

[0086] Of course, in other embodiments of the present invention, the driving unit 31 may also use other linear driving structures, such as electric push rods, cylinders and other structures, and is not limited to the above description.

[0087] In an alternative embodiment of the present invention, the driving device 3 includes a driving source and a plurality of power output ends, and the plurality of power output ends are arranged one-to-one corresponding to the plurality of working pieces 12. The driving source may be a driving motor 312, and the plurality of power output ends may be a plurality of output gears.

[0088] refer to Figure 8 As shown, the 3D printing device further includes a position detection device 8, which is mounted on the housing 2 and is used to detect the position accuracy of the working platform 13 of the feeding module 1. It can be understood that the position detection device 8 is used to obtain the position of the working platform 13 of the feeding module 1, forming a high-precision closed-loop feedback, and realizing precise control of the movement of the working platform 13, thereby ensuring the printing accuracy in the layer thickness direction.

[0089] Optional, reference Fig.13 As shown, the position detection device 8 includes a detection bracket 81, a detection box 82, and a displacement sensor 83 disposed in the detection box 82. The detection bracket 81 is connected to the support platform 21, the detection box 82 is mounted on the detection bracket 81, and the displacement sensor 83 is mounted in the detection box 82 and is disposed directly opposite to the workpiece 12. Installing the displacement sensor 83 in the detection box 82 can protect the displacement sensor 83, prevent the displacement sensor 83 from being damaged and disturbed, and thus improve the detection accuracy of the position detection device 8.

[0090] For further optional reference, Fig.13 As shown, the detection bracket 81 includes a vertical bracket 811 and a horizontal bracket 812. The lower end of the vertical bracket 811 is connected to the support platform 21, and the upper end is connected to the horizontal bracket 812. The horizontal bracket 812 is provided with a wiring groove 8121 and a sealing cover 813 for sealing the wiring groove 8121. In this way, it can ensure that the displacement sensor 83 is located directly above the working platform 13, and it can also facilitate the wiring of the displacement sensor 83.

[0091] For further optional reference, Fig.13As shown, the detection box 82 includes a detection box body 821, a detection cover body 822 and a sealing bracket 823. The detection cover body 822 and the detection box body 821 are buckled to define a detection cavity. The lower end of the detection cavity is open, and the sealing bracket 823 is installed in the detection cavity. The displacement sensor 83 is installed on the sealing bracket 823. The sealing bracket 823 is provided with a detection hole corresponding to the working platform 13. In this way, the protection of the displacement sensor 83 can be further improved to prevent the displacement sensor 83 from being damaged and interfered, thereby improving the detection accuracy of the position detection device 8.

[0092] Of course, in other embodiments of the present invention, the specific type of the position detection device 8 can also be adjusted to an infrared detection device or other structure according to actual needs, and is not limited to the above limitations.

[0093] refer to Fig.14 As shown, a positioning groove 211 is provided on the support platform 21, and the feeding module 1 is installed in the positioning groove 211. The positioning groove 211 is provided with a perforation 212 corresponding to the avoidance hole 1141. It can be understood that the positioning groove 211 can play a positioning and limiting role on the feeding module 1, and can avoid the shaking of the feeding module 1 to a certain extent, thereby ensuring the stable printing process. The perforation 212 corresponding to the avoidance hole 1141 is provided on the positioning groove 211, which can ensure that the curing light of the curing light machine 4 can pass through the avoidance hole 1141 to irradiate into the working chamber 1112, thereby ensuring that the printing material in the working chamber 1112 can be stably cured.

[0094] Optionally, electromagnetic locks and / or lock structures for limiting the feeding module 1 are provided at intervals on the support platform 21. This can prevent the feeding module 1 from shaking to a certain extent, thereby ensuring the stable printing process. Of course, it should be additionally explained here that in other embodiments of the present invention, the feeding module 1 can also be fixed to the support platform 21 by other locking mechanisms, such as electric clamps provided on the support platform 21, and is not limited to the above structure.

[0095] refer to Fig.14 As shown, the locking structure includes a locking assembly 5 and a locking assembly 6 arranged at intervals, and the locking assembly 5 and the locking assembly 6 are respectively stopped at two opposite sides of the shell body 111 of the feeding module 1. It can be understood that the locking assembly 5 and the locking assembly 6 can ensure that the feeding module 1 is stably maintained on the supporting platform 21, and the shaking of the feeding module 1 is avoided, thereby ensuring the stable printing process.

[0096] Optional, reference Fig.15As shown, the locking assembly 5 includes a locking base 51, a locking body 52 and an elastic member 53. The locking base 51 is fixed to the supporting platform 21. The locking base 51 has a rotating groove 511. The locking body 52 is rotatably installed in the rotating groove 511, and one end of the locking body 52 stops at the top wall of the chassis part 1117. The elastic member 53 is sleeved on the rotating shaft of the locking body 52. It can be understood that during the installation of the feeding module 1, the feeding module 1 contacts the locking body 52 when it moves downward, and the locking body 52 rotates under the extrusion of the shell body 111, and the elastic member 53 stores elastic potential energy. When the shell body 111 stops on the bottom wall of the positioning groove 211, the chassis part 1117 has been separated from the locking body 52, and the locking body 52 returns to its original position under the elastic force of the elastic member 53, so that one end of the locking body 52 stops on the top wall of the chassis part 1117, thereby enabling the shell body 111 to be limited in the vertical direction through the locking assembly 5.

[0097] Preferably, the rotating groove 511 is opened at one end along the rotation axis direction of the locking body 52, and the locking assembly 5 also includes a locking sealing plate 54 connected to the locking base 51, thereby improving the convenience of installation.

[0098] Optional, reference Fig.16 As shown, the locking assembly 6 includes a locking base 61, a locking member 62 and an operating member 63. The locking base 61 is fixed to the support platform 21. The locking base 61 has a receiving cavity. The locking member 62 is movably installed in the receiving cavity. The operating member 63 is installed on the locking base 61, and one end is inserted into the receiving cavity to cooperate with the locking member 62. When the operating member 63 is subjected to an external force, it can drive the locking member 62 to extend out of the receiving cavity and stop on the side wall of the shell body 111. It can be understood that in the actual installation process, when the locking body 52 has stopped on the top of the bottom plate 1117, the user can drive the operating member 63 to make the locking member 62 extend out of the receiving cavity and stop on the side wall of the shell body 111, thereby realizing the horizontal limitation of the shell body 111 through the locking base 61. It should be noted that, in the present embodiment, the operating member 63 is a knob, and the locking member 62 can be extended or retracted into the accommodating cavity by rotating the knob. In an alternative embodiment, the operating member 63 can also be a push rod, and the locking member 62 can be extended or retracted into the accommodating cavity by pushing the push rod. In addition, the matching mode of the locking member 62 and the operating member 63 can be selected according to the existing telescopic structure, and no further description is needed here.

[0099] In this embodiment, there may be multiple feeding modules 1 of the 3D printing device, and multiple models may be printed simultaneously according to printing needs during the actual working process.

[0100] In this embodiment, the 3D printing device also includes a control mechanism 9, which can be a centralized or distributed controller. For example, the controller can be a single single-chip microcomputer or a distributed plurality of single-chip microcomputers. The single-chip microcomputer can run a control program to control the drive device 3 and the like to realize their functions respectively.

[0101] The advantages of the 3D printing device of this embodiment are as follows:

[0102] First, there are two or more storage chambers 1111, and the printing materials in the storage chambers 1111 can be different, so that the printing materials in the multiple storage chambers 1111 are fully mixed in a certain proportion and then supplied to the working chamber 1112 for printing, thereby achieving a gradual change effect of the color or performance of the printed model or both the color and the performance;

[0103] Second: relying on the feeding method of extrusion injection of the workpiece 12, it is possible to print high-viscosity slurry, thereby greatly improving the mechanical properties of the work platform 13;

[0104] Third: relying on the feeding method of extrusion injection of the workpiece 12, the liquid pressure is used to realize the rise of the working platform 13, realize the printing release, and complete the material replenishment at the same time, which saves the time of waiting for the material liquid to return and replenish the material in the traditional printing method, and improves the printing speed;

[0105] Fourth: Use the displacement sensor 83 to detect the position of the working platform 13 to form a high-precision closed-loop feedback to ensure the printing accuracy in the layer thickness direction;

[0106] Fifth: A one-way valve 14 is designed on the piston of the working platform 13. The one-way valve 14 is not conductive during printing. When the working platform 13 is pulled out after printing, the one-way valve 14 opens, and air enters the closed working chamber 1112 to balance the internal and external atmospheric pressures, thereby preventing the working platform 13 from being difficult to pull out due to negative pressure.

[0107] Sixth: The 3D printing device is designed with a QR code scanning device 7. Before installing the feeding module 1 on the supporting platform 21, the QR code scanning device 7 is used to scan the code first, and the information of the printing material is entered into the 3D printing device, and then printing can be performed without setting the printing parameters, thereby improving the usability of the device;

[0108] Seventh: The high-viscosity printing material encapsulated in the storage cavity 1111 helps maintain the stability of the slurry and avoid precipitation, thereby facilitating the improvement of printing accuracy.

[0109] In the description of this specification, the description with reference to the terms "some embodiments", "other embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0110] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A feeding module, characterized in that: The feeding module is used for a 3D printing device, and the feeding module comprises: A material supply housing (11), the material supply housing (11) comprising a working chamber (1112) and a plurality of storage chambers (1111), the bottom ends of the plurality of storage chambers (1111) being connected to the bottom end of the working chamber (1112) via a circulation channel, and the plurality of storage chambers (1111) being used to accommodate at least two types of printing materials; A plurality of working pieces (12), the plurality of working pieces (12) being independently arranged, the plurality of working pieces (12) being slidably matched in a plurality of storage chambers (1111) in a one-to-one correspondence, and each of the working pieces (12) being capable of pushing the printing material in the storage chamber (1111) into the working chamber (1112) under the independent drive of an external driving structure; A working platform (13), wherein the working platform (13) is slidably mounted in the working chamber (1112) along its axial direction, and the printing material entering the working chamber (1112) can push the working platform (13) to move; wherein: The curing light can pass through the bottom of the material supply housing (11) to cure the printing material in the working chamber (1112).

2. The feeding module according to claim 1, characterized in that: The circulation channel comprises a confluence channel (1113) and a plurality of branch channels (1114); one end of the confluence channel (1113) is connected to the working chamber (1112), and the other end is connected to one end of the plurality of branch channels (1114); the other ends of the plurality of branch channels (1114) are respectively connected to the plurality of storage chambers (1111) in a one-to-one correspondence.

3. The feeding module according to claim 2, characterized in that: The confluence channel (1113) comprises a mixing channel (11131) and a plurality of connecting channels (11132), one end of the mixing channel (11131) is connected to the plurality of branch channels (1114), and the other end is connected to one end of the plurality of connecting channels (11132), the other end of the plurality of connecting channels (11132) is connected to the working chamber (1112), and the connecting openings of the plurality of connecting channels (11132) and the working chamber (1112) are distributed at intervals along the circumference of the working chamber (1112).

4. The feeding module according to claim 3, characterized in that: The mixing channel (11131) has a plurality of flow branches, so that the printing materials in the plurality of connecting channels (11132) are mixed evenly and then enter the working chamber (1112).

5. The feeding module according to claim 1, characterized in that: The working platform (13) is also provided with a gas channel (132) connected to the working chamber (1112), and a one-way valve (14) is provided in the gas channel (132); wherein: after printing is completed, when the working platform (13) is removed, the one-way valve (14) allows external gas to enter the working chamber (1112) to avoid negative pressure in the working chamber (1112).

6. The feeding module according to claim 1, characterized in that: The upper part of the working cavity (1112) is provided with a limiting groove (1115) and a guide groove (1116) connected to the limiting groove (1115); the working platform (13) is provided with a limiting protrusion (131) cooperating with the limiting groove (1115); the limiting protrusion (131) has a limiting position for being snapped into the limiting groove (1115) and a movable position for being snapped into the guide groove (1116); in the limiting position, the working platform (13) is limited in the working cavity (1112); in the movable position, the working platform (13) can slide along its axial direction in the working cavity (1112) and cannot deflect in the working cavity (1112).

7. A 3D printing device, characterized in that: include: A housing (2), the housing (2) having a mounting cavity and a support platform (21) located above the mounting cavity; The feeding module according to any one of claims 1 to 6, wherein the feeding module is mounted on the supporting platform (21); A driving device (3), the driving device (3) being mounted on the housing (2) and connected to the plurality of working pieces (12) respectively to drive the working pieces (12) to move; A curing light machine (4), the curing light machine (4) is installed in the installation cavity, and the curing light machine (4) is used to emit curing light toward the working cavity (1112) to cure the printed material.

8. The 3D printing device according to claim 7, characterized in that: The 3D printing device further comprises a position detection device (8), wherein the position detection device (8) is mounted on the housing (2) and is used to detect the position accuracy of the working platform (13).

9. The 3D printing device according to claim 8, characterized in that: The driving device (3) comprises a plurality of independently arranged driving units (31), and the plurality of driving units (31) are arranged in a one-to-one correspondence with the plurality of working pieces (12); or: The driving device (3) comprises a driving source and a plurality of power output ends, and the plurality of power output ends are arranged in a one-to-one correspondence with the plurality of working pieces (12).

10. The 3D printing device according to claim 8, characterized in that: The 3D printing device further comprises a two-dimensional code scanning device (7) installed on the housing (2).

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