Scraping assembly, 3D printing device and operation method of scraping assembly

Abstract

The invention provides a material scraping assembly, a 3D printing device and an operation method of the material scraping assembly. A connecting seat; the scraping body is provided with a first end and a second end opposite to the first end in the extending direction, and the first end is installed on the connecting base; the first connecting piece is configured to connect the connecting seat to the substrate at a preset position; the adjusting part is configured to be in threaded connection with the connecting seat on one side, far away from the scraping main body, of a preset position; wherein the adjusting piece can be switched between a first state and a second state, and in the first state, the adjusting piece in threaded connection with the connecting base does not make contact with the base plate; in the second state, the adjusting piece in threaded connection with the connecting base applies pressure to the base plate. According to the technical scheme, the problem that in the prior art, the parallelism of the scraper and the material disc is difficult to guarantee is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to a scraper assembly, a 3D printing device, and an operating method of the scraper assembly. Background Art

[0002] During the photocuring (surface exposure) printing process, a tray is filled with photosensitive resin. A build platform is positioned close to the bottom of the tray, maintaining a certain distance between them. A build area is defined between the build platform and the bottom of the tray. A light source then shines onto the build area, solidifying the photosensitive resin into a thin sheet that adheres to the build platform. The build platform then moves away from the tray to separate the sheet, allowing the photosensitive resin to flow and fill the build area. The next layer of material is then irradiated and cured on top of the already cured sheet. After layers are cured and stacked, the printing process is complete.

[0003] In the related art, the photosensitive resin can be pushed by the reciprocating movement of the scraper, which is conducive to filling the gap caused by the departure of the solidified material with the adjacent photosensitive resin.

[0004] During installation, it's difficult to ensure parallelism between the scraper and the tray, meaning the scraper can easily tilt upward or downward. Since the scraper's length essentially spans the width of the tray, parallelism significantly affects the height of one end of the scraper. When the scraper is tilted upward relative to the tray, there's a risk of the scraper striking the build platform during movement. When the scraper is tilted downward relative to the tray, there's a risk of the scraper contacting or even damaging the release film on the tray. Summary of the Invention

[0005] The main purpose of the present invention is to provide a scraper assembly, a 3D printing device and an operating method of the scraper assembly to solve the problem in the related art that the parallelism between the scraper and the material tray is difficult to ensure.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a scraper assembly is provided, comprising: a substrate; a connecting seat; a scraper body having a first end and a second end opposite to the first end along the extension direction, the first end being mounted to the connecting seat; a first connecting member configured to connect the connecting seat to the substrate at a predetermined position; an adjusting member configured to be on a side away from the scraper body at the predetermined position, and to drive the connecting seat to rotate around the predetermined position, thereby lowering the second end of the scraper body connected to the connecting seat.

[0007] In some embodiments, the adjusting member includes an elastic element arranged between the base plate and the connecting seat.

[0008] In some embodiments, the adjusting member is threadedly connected to the connecting seat; wherein, the adjusting member can switch between a first state and a second state, in the first state, the adjusting member threadedly connected to the connecting seat does not contact the substrate; in the second state, the adjusting member threadedly connected to the connecting seat applies pressure to the substrate.

[0009] In some embodiments, the scraper assembly further includes a guide rail member and a slider slidably disposed on the guide rail member, and the slider is connected to the base plate.

[0010] In some embodiments, the first end of the scraper body is detachably connected to the connecting seat, or the first end of the scraper body and the connecting seat are integrally formed.

[0011] In some embodiments, the scraper body includes a heating element.

[0012] In some embodiments, the scraper body is provided with a mounting groove, in which a heating element and an elastic thermal pad are provided.

[0013] In some embodiments, the scraper body includes at least one through-hole.

[0014] In some embodiments, the plurality of first connecting members are arranged along a direction perpendicular to the extending direction.

[0015] In some embodiments, the first connecting member includes a head and a rod having threads, wherein the head contacts the connecting seat, and the rod extends through the connecting seat and is threadedly connected to the base plate.

[0016] In some embodiments, the first connecting member is a shaft that passes through the hole of the connecting base and the hole of the base plate, and the connecting base is capable of rotating around the axis of the shaft.

[0017] According to a second aspect of the present invention, a 3D printing device is provided, comprising: a material tray configured to accommodate a photosensitive resin; an optical system located on a first side of the material tray and configured to project light onto the material tray; a forming platform located on a second side of the material tray opposite to the first side and configured to adhere the cured photosensitive resin; and the above-mentioned scraper assembly.

[0018] Furthermore, the second end of the scraper body of the scraper assembly can be supported by the supporting protrusion of the material tray.

[0019] According to a third aspect of the present invention, there is provided a method for operating a scraper assembly, comprising:

[0020] Operate the first connecting member of the scraper assembly to connect the substrate and the connecting seat of the scraper assembly at a predetermined position; and operate the adjusting member of the scraper assembly so that the adjusting member drives the part of the connecting seat close to the adjusting member to move away from the substrate, and the part of the connecting seat away from the adjusting member to move close to the substrate, wherein the adjusting member is located on the side of the scraper body away from the scraper assembly at the predetermined position.

[0021] Using the technical solution of the present invention, the first end of the scraper body is mounted to a connecting seat. A first connecting member is configured to connect the connecting seat to the base plate at a predetermined position. An adjusting member is located at a predetermined position on a side of the scraper assembly away from the scraper body, driving the portion of the connecting seat proximate the adjusting member to move away from the base plate, and the portion of the connecting seat distal to the adjusting member to move toward the base plate. Thus, the technical solution of this application advantageously adjusts the parallelism between the scraper blade and the tray. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of a scraper assembly according to the present invention is shown;

[0024] Figure 2 Shown Figure 1 A schematic cross-sectional view of a partial structure of a scraper assembly;

[0025] Figure 3 Shown Figure 1 A schematic diagram of the three-dimensional structure of the connection seat of the scraper assembly;

[0026] Figure 4 Shown Figure 3 A top view schematic diagram of a connecting seat;

[0027] Figure 5 Shown Figure 4 A schematic cross-sectional view of the connecting seat in the AA direction;

[0028] Figure 6 Shown Figure 1 A schematic diagram of the three-dimensional structure of the scraper body of the scraper assembly;

[0029] Figure 7 Shown Figure 6 Schematic diagram of the decomposition structure of the scraper body;

[0030] Figure 8 Shown Figure 6 A schematic cross-sectional view of a scraper body along a certain plane;

[0031] Figure 9 Shown Figure 1 Schematic diagram of the principle structure of the scraper assembly;

[0032] Figure 10 A schematic diagram of the three-dimensional structure of an embodiment of a material tray assembly according to the present invention is shown;

[0033] Figure 11A and Figure 11B Another embodiment of a scraper assembly is shown. DETAILED DESCRIPTION

[0034] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0035] 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 application. 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 "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0036] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. 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 actual proportional relationships. 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 the exemplary embodiments can have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0037] like Figure 1 、 Figure 2 as well as Figure 9As shown, in this embodiment, the scraper assembly includes: a substrate 10, a connecting seat 20, a scraper body 30, a first connecting member 40, and an adjusting member 50. The scraper body 30 has a first end and a second end opposite to the first end along the extension direction, and the first end is mounted to the connecting seat 20. The first connecting member 40 is configured to fix the connecting seat 20 to the substrate 10 at a predetermined position. The adjusting member 50 is configured to be threadedly connected to the connecting seat 20 on a side away from the scraper body 30 at a predetermined position. The adjusting member 50 is capable of switching between a first state and a second state. In the first state, the adjusting member 50 threadedly connected to the connecting seat 20 does not contact the substrate 10; in the second state, the adjusting member 50 threadedly connected to the connecting seat 20 applies pressure to the substrate 10.

[0038] Applying the technical solution of this embodiment, the first end of the scraper body 30 is mounted to the connecting seat 20. The first connecting member 40 is configured to connect the connecting seat 20 to the substrate 10 at a predetermined position. The adjusting member 50 is configured to be on a side away from the scraper body 30 at a predetermined position, and the adjusting member 50 is threadedly connected to the connecting seat 20. The adjusting member 50 can switch between a first state and a second state. In the first state, the adjusting member 50 does not contact the substrate 10 (for example, there is a gap between the substrate 10 and the connecting seat 20 to facilitate the movement of the connecting seat 20 relative to the substrate 10). In the second state, the adjusting member 50 applies pressure to the substrate 10. Through the above-mentioned arrangement, the arrangement of the adjusting member 50 can adjust the abutting state between the connecting seat 20 and the substrate 10, that is, the adjusting member 50 can adjust the relative positional relationship between the connecting seat 20 and the substrate 10, and since the first end of the scraper body 30 is arranged on the connecting seat 20, that is, when the abutting state between the connecting seat 20 and the substrate 10 changes, the scraper body 30 can move synchronously, thereby achieving the adjustment of the horizontality of the scraper body 30.

[0039] Specifically, the technical solution of this embodiment utilizes the lever effect and precise control of the adjustment member 50 to ensure that the scraper body 30 remains parallel to the surface of the material tray, thereby avoiding the problem of interference with the forming platform or damage to the material tray release film due to improper tilting of the scraper body 30.

[0040] It should be noted that the above-mentioned pressing state refers to the force exerted by the adjusting member 50 on the fixed substrate 10 to cause the substrate 10 to move away from the connecting seat 20 .

[0041] In this embodiment, a sliding member is provided at the second end of the scraper body 30. The sliding member may be made of nylon material, which has good wear resistance and low resistance. The sliding member advantageously reduces the friction between the scraper body 30 and the tray.

[0042] Specifically, the above-mentioned sliding member can be a roller structure, a spherical structure, a cylindrical structure, etc.

[0043] like Figures 3 to 5 As shown, in this embodiment, the adjusting member 50 is a rod-shaped structure, and the adjusting member 50 is centrally arranged with respect to the connecting seat 20. This arrangement can also ensure the stability of the adjustment, that is, when the adjusting member 50 is adjusting, it is not easy for the scraper body 30 to deflect. Figure 1 and Figure 2 As shown, in this embodiment, the scraper assembly further includes a guide rail 81 and a slider 82 slidably disposed on the guide rail 81. The slider 82 is connected to the base plate 10. The guide rail 81 and the slider 82 provide a guiding fit, thereby ensuring the linearity and stability of the scraper body 30 during movement. Furthermore, the connection between the slider 82 and the base plate 10 enables smooth sliding of the scraper assembly. This makes the scraping process smoother, prevents shaking or deviation of the scraper body 30 during movement, and improves printing accuracy.

[0044] It should be noted that the technical solution of this embodiment, through the cooperation of the adjustment member 50 and the first connecting member 40, can precisely adjust the inclination of the scraper body 30 relative to the material tray, effectively preventing the scraper body 30 from tilting upward and interfering with the forming platform. If the adjustment member 50 is threaded, the number of rotations of the adjustment member can accurately control the movement of the connecting seat, thereby controlling the downward tilt distance of the free end of the scraper body.

[0045] like Figures 1 to 3 as well as Figure 6 and Figure 7 As shown, in this embodiment, the first end of the scraper body 30 is detachably connected to the connecting seat 20. The above arrangement enables the scraper body 30 to be disassembled, which makes it easier to replace or clean the scraper body 30.

[0046] In an embodiment not shown in the drawings, the first end of the scraper body 30 is integrally formed with the connecting seat 20 .

[0047] like Figures 6 to 8 As shown, in this embodiment, the scraper body 30 includes a heating element 72. The provision of the heating element can heat the scraper body 30. The heating element 72 is, for example, installed outside or inside the scraper body 30.

[0048] like Figures 6 to 8 As shown, in this embodiment, the scraper body 30 is provided with a mounting groove 34, in which a heating element 72 and an elastic thermal pad 71 are disposed. The above design utilizes the thermal pad 71 as a heat conduction medium between the heating element 72 and the scraper body 30 to improve heat transfer efficiency.

[0049] like Figure 7 and Figure 8As shown, in this embodiment, the thermal pad 71 is elastic. The elastic thermal pad 71 ensures close contact between the heating element 72 and the scraper body 30, so that heat can be transferred from the heating element 72 to the scraper body 30 through the elastic thermal pad 71. The thermal conductivity of the elastic thermal pad 71 is greater than that of air.

[0050] Furthermore, because the elastic thermal pad 71 can be compressed, the heater 72 is fully aligned with the pad 71, and the pad 71 is fully aligned with the scraper body 30. This advantageously reduces the amount of air between the heater 72 and the scraper body 30. The use of solid heat conduction essentially replaces gas heat conduction, thereby improving the heat exchange efficiency between the heater 72 and the scraper body 30. In other words, the elastic thermal pad 71 prevents the formation of a gap between the heater 72 and the scraper body 30, thereby ensuring effective heat transfer.

[0051] The combination of a resilient thermal pad 71 and a heater 72 not only ensures good thermal contact between the heater 72 and the scraper body 30, improving heat transfer efficiency, but also directly measures the temperature of the scraper body 30 via an NTC sensor, enabling precise control of the material temperature and further optimizing printing performance. The thermal pad 71 may comprise, for example, at least one of silicone, silicone grease, glue, and graphene, such as thermally conductive silicone.

[0052] In addition, the detachable design of the scraper body 30 and the connecting seat 20 makes maintenance and replacement simple and quick, effectively extending the service life of the scraper assembly and reducing maintenance costs.

[0053] like Figure 1 、 Figure 2 、 Figure 6 as well as Figure 7 As shown, in this embodiment, the scraper body 30 includes at least one conducting hole 35. The provision of the conducting hole 35 can reduce the resistance of the scraper body 30 during movement, while reducing the weight of the scraper body 30 and improving its movement flexibility and response speed.

[0054] Specifically, the conducting holes 35 are provided on the side wall of the scraper body 30 . There are a plurality of conducting holes 35 , which are spaced apart along the length direction of the side wall of the scraper body 30 .

[0055] like Figures 3 to 5 As shown in FIG. 1 , in this embodiment, a plurality of first connecting members 40 are arranged in a direction perpendicular to the extension direction. The above arrangement facilitates adjustment.

[0056] like Figures 3 to 5As shown, in this embodiment, the first connecting member 40 includes a head and a rod with threads, wherein the head contacts the connecting seat 20, and the rod extends through the connecting seat 20 and is threadedly connected to the base plate 10. The above arrangement can ensure better adjustment stability.

[0057] like Figures 1 to 5 As shown, in this embodiment, the first connecting member 40 is located between the scraper body 30 and the adjusting member 50. The first connecting member 40 can ensure a stable connection between the connecting base 20 and the substrate 10. On this basis, in a lever system with the first connecting member 40 as the intermediate fulcrum, the movement of the adjusting member 50 or the connecting base 20 on one side of the intermediate fulcrum causes the movement of the scraper body 30 on the other side of the intermediate fulcrum.

[0058] like Figures 3 to 5 As shown, in this embodiment, the adjusting member 50 includes an adjusting bolt 51 . The connecting seat 20 is provided with a first threaded hole 21 . The adjusting bolt 51 is engaged in the first threaded hole 21 and can abut against the base plate 10 .

[0059] In some embodiments, as the adjusting bolt 51 is screwed in, the adjusting bolt 51 moves closer to the substrate 10 until it contacts the substrate 10. Subsequently, the adjusting bolt 51 continues to be screwed in, so that the adjusting bolt 51 applies pressure to the substrate 10 that tends to move the substrate 10 away from the connecting base 20. The substrate 10 is fixed and basically stationary, for example, connected to the connecting base 20 at the first connecting member 40 by the first connecting member 40, and optionally fixed to the slider 82 by other fixing members (such as screws). Due to the fixed substrate 10 and the adjusting bolt 51 screwed in relative to the connecting base 20, the portion of the connecting base 20 close to the adjusting bolt 51 moves away from the substrate 10 in the fixed position. Based on the principle of leverage, the portion of the connecting base 20 close to the adjusting bolt 51 moves close to the substrate 10 in the fixed position, and the scraper body 30 connected to the portion of the connecting base 20 close to the adjusting bolt 51 moves in a direction close to the substrate 10 in the fixed position.

[0060] Specifically, the adjusting bolt 51 of this embodiment realizes stepless adjustment of the inclination of the scraper body 30, thereby improving the flexibility and accuracy of the adjustment.

[0061] In other embodiments, the adjusting member may also be a screw-nut structure, a push rod structure, or a structure in which a limiting tooth and a rack cooperate.

[0062] like Figures 1 to 5As shown, in this embodiment, there are multiple first connecting members 40. The multiple first connecting members 40 are symmetrically arranged on both sides of a vertical plane passing through the centerline of the scraper body 30. This symmetrical distribution can balance the forces acting on the scraper assembly, ensuring the stability of the entire scraper assembly during adjustment. In addition, the provision of multiple first connecting members 40 can improve the connection stability between the connecting base 20 and the base plate 10.

[0063] like Figures 3 to 5 As shown, in this embodiment, the first connecting member 40 includes a connecting bolt 41. The connecting base 20 is provided with a first connecting hole 22, and the base plate 10 is provided with a second threaded hole 11 corresponding to the first connecting hole 22. The connecting bolt 41 extends through the first connecting hole 22 and connects to the second threaded hole 11. This arrangement provides a reliable connection through threaded connection while allowing for minimal relative movement between the connecting base 20 and the base plate 10. This ensures the installation and flexible adjustment of the scraper assembly, improving the durability and functionality of the entire device.

[0064] In other embodiments, the first connecting member 40 is connected to the substrate 10 by snap-fit ​​connection or magnetic connection.

[0065] like Figures 3 to 5 As shown, in this embodiment, a positioning cylinder 12 is provided on the base plate 10, and the second threaded hole 11 is disposed within the positioning cylinder 12. The positioning cylinder 12 is inserted into the first connecting hole 22. The design of the positioning cylinder 12 enhances the positioning accuracy and connection stability of the connecting bolt 41, preventing the connection from loosening after prolonged use. Furthermore, since the positioning cylinder 12 can be inserted into the first connecting hole 22, it can effectively achieve positioning between the base plate 10 and the connecting base 20, thereby improving the stability of the base plate 10 and the connecting base 20.

[0066] like Figures 3 to 5 As shown, in this embodiment, the first connecting hole 22 includes a first hole section 221, a second hole section 222, and a third hole section 223, which are arranged in sequence. The diameter of the first hole section 221 is larger than the diameter of the second hole section 222, and the diameter of the third hole section 223 is larger than the diameter of the second hole section 222. The positioning cylinder 12 is inserted into the third hole section 223, and the connecting bolt 41 is connected to the second hole section 222. The head of the connecting bolt 41 is located in the first hole section 221. The above-mentioned design of the first hole section 221, the second hole section 222, and the third hole section 223 with different diameters achieves the positioning and limiting of the connecting bolt 41, while providing sufficient space to accommodate the head of the connecting bolt 41 to avoid interference. This can make the connection structure more compact and more convenient to operate, while ensuring the stability of the connection and the flexibility of adjustment.

[0067] like Figures 1 to 5As shown, in this embodiment, the connection base 20 is provided with a mounting portion 23, to which the first end of the scraper body 30 is fixed. The mounting portion 23 is used to secure the scraper body 30, thereby ensuring the stability and positioning accuracy of the scraper body 30 during operation. This arrangement ensures that the scraper body 30 is securely fixed to the connection base 20, preventing shaking or deviation during the scraping process, thereby ensuring printing accuracy.

[0068] like Figures 1 to 5 As shown, in this embodiment, the mounting portion 23 includes a mounting recess 231, which is provided with a second connection hole 2311. The first end of the scraper body 30 is inserted into the mounting recess 231. The scraper body 30 is provided with a third threaded hole 31 corresponding to the second connection hole 2311. The scraper assembly also includes a second connector 60, which passes through the second connection hole 2311 and connects to the third threaded hole 31. The mounting recess 231 engages the first end of the scraper body 30, thereby achieving precise fixation between the scraper body 30 and the connecting base 20 while allowing for necessary fine-tuning. This ensures more stable installation of the scraper body 30 and more precise adjustment.

[0069] Specifically, in this embodiment, the second connecting member 60 is a fixing screw.

[0070] like Figures 1 to 7 As shown, in this embodiment, a positioning protrusion 32 is provided at the first end of the scraper body 30. The shape of the positioning protrusion 32 matches the shape of the mounting recess 231, and the positioning protrusion 32 is inserted into the mounting recess 231. Since the shape of the positioning protrusion 32 matches the shape of the mounting recess 231, the relative position between the scraper body 30 and the connecting base 20 can be guaranteed, thereby making the position between the scraper body 30 and the connecting base 20 more stable, that is, preventing positional deviation during operation, improving the installation accuracy and stability of the scraper body, and reducing errors during the printing process.

[0071] like Figures 1 to 7 As shown, in this embodiment, a surrounding wall 2312 is provided at the bottom of the mounting recess 231. The second connection hole 2311 is located within the surrounding wall 2312. A clearance notch 33 is provided at the bottom of the first end of the scraper body 30. The surrounding wall 2312 can be inserted into the clearance notch 33. The cooperation between the surrounding wall 2312 and the clearance notch 33 restricts lateral movement of the scraper body 30 during installation, while also providing clearance space to prevent interference with other structures. This ensures more stable installation and more precise positioning of the scraper body 30.

[0072] Specifically, the exemplary installation steps of the scraper assembly of this embodiment are as follows:

[0073] 1. Place the second end of the scraper body 30 on the supporting ledge 91 so that the second end of the scraper body 30 is supported. Alternatively, the second end of the scraper body 30 is held above the film of the tray.

[0074] 2. Fix the scraper body 30 and the connecting seat 20 together.

[0075] 3. Connect the connector 20 to the base plate 10. During this process, the base plate 10 remains fixed. With the first connector 40 connected, the second end of the scraper body 30 may become flush with the support ridge 91 or warp upward. Flushness is a desirable outcome; warping is unlikely because the second end of the scraper body 30 is supported and restrained by the support ridge 91. Warping upward is undesirable and may interfere with the molding platform above, requiring adjustment.

[0076] 4. Adjustment using the adjusting member 50: As the adjusting member 50 rotates, it moves relative to the connecting base 20. The downward movement of the adjusting member 50 is restricted by the base 10, causing the connecting base 20 to move upward. Furthermore, because the first connecting member 40 of the connecting base 20 is already connected to the base 10 and positioned to form a lever, the second end of the scraper body 30 tends to move downward, thereby enabling adjustment of the position of the second end of the scraper body 30.

[0077] According to a second aspect of the present application, a 3D printing device is provided, such as Figure 10 As shown, the 3D printing device includes: a material tray 90 configured to hold photosensitive resin; an optical system located on a first side of the material tray 90 and configured to project light onto the material tray 90; a molding platform located on a second side of the material tray 90, opposite the first side, and configured to adhere the cured photosensitive resin; and a scraper assembly according to the above-described method. The scraper assembly described above enables efficient and uniform leveling and preheating of the material, improving the stability and efficiency of the printing process. This significantly improves print quality, increases material utilization, and accelerates printing speed. Therefore, a 3D printing device equipped with the above-described scraper assembly also possesses the aforementioned advantages.

[0078] like Figure 10 As shown, in this embodiment, the second end of the scraper body 30 of the scraper assembly can be supported by a supporting ledge 91 of the material tray 90. The supporting ledge 91 provides an additional support point, preventing the scraper body 30 from sagging or shifting during operation and ensuring its parallelism with the surface of the material tray 90. This makes the scraping process more stable and avoids material accumulation or uneven scraping caused by sagging of the scraper body 30.

[0079] According to a third aspect of the present application, a method for operating a scraper assembly is provided, comprising:

[0080] Operate the first connecting member 40 of the scraper assembly to connect the substrate 10 and the connecting seat 20 of the scraper assembly at a predetermined position; and operate the adjusting member 50 of the scraper assembly to switch the adjusting member 50 from not contacting the substrate 10 to contacting the substrate 10 and apply pressure to the substrate 10, so that the part of the connecting seat 20 close to the adjusting member 50 moves away from the substrate 10, and the part of the connecting seat 20 away from the adjusting member 50 moves close to the substrate 10, wherein the adjusting member 50 is located on the side of the scraper body 30 away from the scraper assembly at the predetermined position.

[0081] Specifically, the first connecting member 40 is operated to connect the substrate 10 and the connecting base 20 at a predetermined position, thereby connecting the substrate 10 and the connecting base 20. The adjusting member 50 is operated to switch from not contacting the substrate 10 to applying pressure to the substrate 10, so that the portion of the connecting base 20 close to the adjusting member 50 moves away from the substrate 10, thereby adjusting the levelness of the scraper body 30.

[0082] Figures 11A to 11B Another embodiment of the scraper assembly is shown. Figure 11A In the embodiment, the scraper body 1120 of the scraper assembly is fixed to the connecting seat 1140, or the scraper body 1120 and the connecting seat 1140 are made into one piece. The connecting seat 1140 is rotatably connected to the base plate 1160 by a first connecting member 1150. For example, the first connecting member 1150 in the form of an axis extends through the holes of the connecting seat 1140 and the base plate 1160, so that the connecting seat 1140 can rotate relative to the base plate 1160. After the scraper body 1120 is initially placed, the free end of the scraper body 1120 (i.e., the end away from the connecting seat 1140) may be flush with the horizontal plane 1190 or tilted upward relative to the horizontal plane 1190. At this time, the adjustment member 1170 can force the connecting seat 1140 to rotate around the axis 1150, so that the free end of the scraper body 1120 moves to tilt downward or flush relative to the horizontal plane 1190.

[0083] The adjusting member 1170 is an elastic element, such as a spring, polyurethane, etc., which is arranged on the side of the shaft 1150 away from the scraper body. It can be understood that as the connection between the connecting seat and the base plate is connected, the adjusting member 1170 causes the part of the connecting seat 1140 close to the adjusting member 1170 to move away from the base plate 1160 through elastic force, and at the same time, the part of the connecting seat 1140 away from the adjusting member 1170 moves closer to the base plate 1160 until it contacts the base plate or the friction between them increases (such as Figure 11B As the connection base 1140 rotates around the axis 1150 , the gap between the connection base 1140 and the base plate 1160 changes.

[0084] In the description of the present invention, it should be understood that "plurality" refers to a quantity of two or more than two. The directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the devices or components referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside" and "outside" refer to the inside and outside relative to the outline of each component itself.

[0085] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0086] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0087] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A scraper assembly, characterized in that: include: substrate; Connecting seat; A scraper body having a first end and a second end opposite to the first end along an extending direction, wherein the first end is mounted to the connecting seat; a first connecting member configured to connect the connecting base to the substrate at a predetermined position; The adjusting member is configured to be at a side of a predetermined position away from the scraper body, and drives the connecting seat to rotate around the predetermined position, thereby lowering the second end of the scraper body connected to the connecting seat.

2. The scraper assembly according to claim 1, characterized in that: The adjusting member includes an elastic element arranged between the base plate and the connecting seat.

3. The scraper assembly according to claim 1, characterized in that: The adjusting member is threadedly connected to the connecting seat, and the adjusting member can be switched between a first state and a second state. In the first state, the adjusting member threadedly connected to the connecting seat does not contact the substrate; in the second state, the adjusting member threadedly connected to the connecting seat applies pressure to the substrate.

4. The scraper assembly according to claim 1, characterized in that: The scraper assembly further comprises a guide rail member and a slider slidably arranged on the guide rail member, and the slider is connected to the base plate.

5. The scraper assembly according to claim 1, characterized in that: The first end of the scraper body is detachably connected to the connecting seat, or the first end of the scraper body is integrally formed with the connecting seat.

6. The scraper assembly according to claim 1, characterized in that: The scraper body includes a heating element.

7. The scraper assembly according to claim 6, characterized in that: The scraper body is provided with a mounting groove, in which a heating element and an elastic heat-conducting pad are arranged.

8. The scraper assembly according to claim 6, characterized in that: The scraper body includes at least one conducting hole.

9. The scraper assembly according to claim 1, characterized in that: The plurality of first connecting members are arranged along a direction perpendicular to the extending direction.

10. The scraper assembly according to claim 1, characterized in that: The first connecting member includes a head and a rod with threads, wherein the head contacts the connecting seat, and the rod extends through the connecting seat and is threadedly connected to the base plate.

11. The scraper assembly according to claim 1, characterized in that: The first connecting member is a shaft configured to pass through the hole of the connecting base and the hole of the base plate, and the connecting base can rotate around the axis of the first connecting member.

12. A 3D printing device, characterized in that: include: a tray configured to receive a photosensitive resin; an optical system located on a first side of the tray and configured to project light toward the tray; a molding platform located on a second side of the tray opposite to the first side and configured to adhere the cured photosensitive resin; and A scraper assembly according to any one of claims 1 to 11.

13. The 3D printing device according to claim 12, characterized in that: The second end of the scraper body of the scraper assembly can be supported by the supporting protrusion of the material tray.

14. A method for operating a scraper assembly, characterized in that: include: Operating the first connecting member of the scraper assembly to connect the base plate and the connecting seat of the scraper assembly at a predetermined position; and operating the adjusting member of the scraper assembly so that the adjusting member drives the portion of the connecting seat close to the adjusting member to move away from the substrate, and the portion of the connecting seat away from the adjusting member to move closer to the substrate, The adjusting member is located at a predetermined position on a side of the scraper body away from the scraper assembly.

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