3D printing equipment

Abstract

The utility model discloses 3D printing equipment which comprises a printing platform, a driving mechanism, a spreading mechanism and an adjusting assembly, the printing platform is used for bearing a material layer, the driving mechanism is connected with the printing platform and used for adjusting the position of the printing platform in the Z-axis direction, and the spreading mechanism comprises a moving assembly, a scraper and the adjusting assembly. The scraper reciprocates on the plane through the moving assembly, and the scraper is used for laying the to-be-cured material on the printing platform so as to form a material layer on the printing platform. The adjusting assembly is connected to the moving assembly, the scraper is connected to the adjusting assembly, and the adjusting assembly is used for adjusting the position of the scraper in the Z-axis direction. The height of the scraper in the Z-axis direction is adjusted in real time through the adjusting assembly, different material characteristics or different layer thickness requirements can be met, and material laying uniformity is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of 3D printing technology, and specifically relates to a 3D printing device. Background Technology

[0002] 3D printing, or rapid prototyping technology, is a technique that uses digital model files as a basis and employs bondable or curable materials such as powdered metals, plastics, and resins to construct objects layer by layer. 3D printing equipment manufactures 3D objects using this printing technology, and due to its high precision, it has wide applications in mold making, customized products, medical devices, prostheses, and other fields.

[0003] During printing, the process typically involves printing layer by layer using a slicing method. A photocurable material is cured between the printing reference surface and the component platform to form a pattern curing layer. The above steps are repeated to form a printed structure on the component platform that has accumulated pattern curing layers.

[0004] For example, the prior art discloses an invention patent application entitled "3D Printing Equipment" (application publication number: CN116353054A), in which the scraper is connected to the second crossbeam and the blade faces the plane where the component platform is located, so as to move with the second crossbeam, the flowing material to be cured is laid on the component platform. The blade of the scraper is flush with the opening of the forming chamber, so as to use the opening of the forming chamber to lay the flowing material to be cured onto the area to be formed to form a material layer.

[0005] However, when the scraper height is fixed, the distance between the scraper and the printing platform cannot be flexibly adjusted according to different material properties or different layer thickness requirements, which can easily lead to uneven material spreading. Utility Model Content

[0006] This invention provides a 3D printing device that solves the technical problems of poor adaptability and low precision caused by the non-adjustable height of the scraper in the prior art by improving the specific structure of the auxiliary material mechanism.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] A 3D printing device, comprising:

[0009] The printing platform is used to support the material layers;

[0010] The drive mechanism, connected to the printing platform, is used to adjust the position of the printing platform in the Z-axis direction;

[0011] The material spreading mechanism includes a moving component and a scraper. The scraper moves back and forth on a plane via the moving component and is used to spread the material to be cured onto the printing platform to form a material layer on the printing platform.

[0012] The material spreading mechanism is characterized by further comprising:

[0013] An adjustment component is connected to the moving component, and the scraper is connected to the adjustment component. The adjustment component is used to adjust the position of the scraper in the Z-axis direction.

[0014] Furthermore, the adjustment assembly includes a scraper mounting plate and a scraper adjustment plate. The scraper mounting plate is fixed on the moving assembly, and the scraper adjustment plate and the scraper are fixedly connected. The scraper adjustment plate is provided with a first connector, and the first connector is provided with a second connector. The second connector can be adjusted in position along the Z-axis direction on the first connector, and the second connector is limited on the scraper mounting plate.

[0015] Furthermore, connector one is a connecting column that passes through the through hole of the scraper plate. Connector two is nut one, which is bolted to the connecting column. After nut one is adjusted along the Z-axis on the connecting column, it is limited on the scraper plate.

[0016] Furthermore, the nut is fixed to the top surface of the scraper mounting plate with glue.

[0017] Furthermore, the connecting column is threaded with two nuts. Nut one is locked at the top surface of the scraper plate, and nut two is locked at the bottom surface of the scraper plate.

[0018] Furthermore, the scraper has a cavity, an opening at the bottom, and a through hole at the top, with the cavity connecting the opening and the through hole.

[0019] Furthermore, the top of the scraper is provided with a tube, the tube has a hole, and the hole and the through hole are connected.

[0020] Furthermore, the tube extends in the Z-axis direction, the scraper adjustment plate is provided with mounting hole one, the scraper hanging plate is provided with mounting hole two, and the tube passes through mounting hole one and mounting hole two.

[0021] Furthermore, the moving component includes a second guide rail and a second slider. The second slider moves linearly back and forth on the second guide rail. Both ends of the scraper plate are provided with connecting parts. The cross-sectional area of ​​the connecting parts is larger than the cross-sectional area of ​​the scraper plate. The connecting parts and the second slider are fixedly connected by connecting bolts.

[0022] Furthermore, it also includes a material trough, which has a chamber with an opening. The printing platform moves vertically within the chamber through the opening. A support platform is provided on the top of the material trough, and the moving component is fixed on the support platform.

[0023] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0024] (1) This utility model adjusts the height of the scraper in the Z-axis direction in real time by adjusting the component, which can adapt to different material properties or different layer thickness requirements and ensure the uniformity of material laying.

[0025] (2) By finely adjusting the scraper, the material layer is avoided to be too thick or too thin, which is especially suitable for the layer-by-layer forming of high-precision parts.

[0026] (3) After the scraper wears out after long-term use, the position can be compensated by adjusting the component, so that the scraper does not need to be replaced frequently, thus reducing maintenance costs. Attached Figure Description

[0027] The present invention will be further described below with reference to the accompanying drawings:

[0028] Figure 1 This is a schematic diagram of the structure of a 3D printing device according to the present invention;

[0029] Figure 2 This is a schematic diagram of the connection between the scraper and the adjustment component in Embodiment 1 of this utility model;

[0030] Figure 3 This is a schematic diagram of the connection between the scraper and the adjusting component in Embodiment 2 of this utility model;

[0031] Figure 4 for Figure 3 Enlarged structural diagram at point A;

[0032] Figure 5 This is a schematic diagram of the adjustment component in this utility model;

[0033] Figure 6 This is a schematic diagram of the fixed connection between the scraper adjusting plate and the scraper in this utility model;

[0034] Figure 7 This is a schematic diagram of the structure of the scraper in Embodiment 1 of this utility model;

[0035] Figure 8 for Figure 7 The left view;

[0036] Figure 9 for Figure 8 Sectional view along the BB direction;

[0037] Figure 10 This is a schematic diagram of the scraper in Embodiment 2 of this utility model;

[0038] Figure 11 This is a structural schematic diagram of a first embodiment of the connection between the material trough and the support platform of this utility model;

[0039] Figure 12 This is a schematic diagram of the structure of Embodiment 2 of the connection between the material trough and the support platform of this utility model;

[0040] Figure 13 This is a schematic diagram of the structure of the mobile component in this utility model;

[0041] Figure 14 This is a schematic diagram of the platform support plate in this utility model.

[0042] In the diagram, 1 - printing platform;

[0043] 2-Drive mechanism; 21-Stepper motor; 22-Lead screw nut; 23-Connecting plate; 24-Slider one; 25-Guide rail one; 26-Lead screw; 27-Mounting base one; 28-Platform support plate; 29-Mounting base two; 210-Bracket;

[0044] 31-Moving component; 311-Slider II; 312-Guide rail II; 32-Scraper; 321-Opening; 322-Cavity; 323-Through hole; 324-Scraper main board; 325-Scraper side plate; 326-Reinforcing plate; 33-Scraper hanging plate; 331-Connecting part; 332-Mounting hole II; 34-Scraper adjusting plate; 341-Mounting hole I; 35-Connecting column; 36-Nut I; 37-Nut II; 38-Pipe; 381-Pipe hole;

[0045] 4-Feed trough; 41-Trough platform; 42-Cavity; 43-Reinforcing plate;

[0046] 5-Supporting platform; 51-Metal frame;

[0047] 6-Connecting bolts;

[0048] 7-Fixing bolts;

[0049] 8-Energy radiation mechanism;

[0050] 91 - Magnet Two; 92 - Magnet One. Detailed Implementation

[0051] like Figures 1 to 14 As shown, this utility model discloses a 3D printing device, including a printing platform 1, a drive mechanism 2, a material laying mechanism, an energy radiation mechanism 8, and a material tank 4. In this utility model, the length direction of the material tank 4 is defined as the X-axis, the width direction as the Y-axis, and the height direction as the Z-axis. During the printing process, the material laying mechanism lays the flowing material to be cured onto the printing platform 1, allowing the printing platform 1 to bear the material layer. The energy radiation mechanism 8 radiates patterning energy onto the flowing material layer to form a patterned curing layer. The energy radiation mechanism 8 is prior art; specifically, refer to the invention patent application entitled "3D Printing Device" (application publication number: CN116353054A). The drive mechanism 2 is connected to the printing platform 1 and adjusts the position of the printing platform 1 in the Z-axis direction to drive the printing platform 1 to move layer by layer.

[0052] The material trough 4 of this utility model has a chamber 42 with an opening. The printing platform 1 moves vertically within the chamber 42 through the opening. The support platform 5 is fixed to the material trough 4. The fixing method can be designed as follows: Fixing method one, such as... Figure 11 As shown: A metal frame 51 is fixed to the outside of the support platform 5, and a trough platform 41 is fixed to the outside of the material trough 4. The metal frame 51 and the trough platform 41 are connected by fixing bolts 7. Fixing method two, as shown... Figure 12 As shown: A platform 41 is provided on the outer side of the material trough 4. A stiffening plate 43 is fixed between the platform 41 and the material trough 4. The platform 41 is equipped with a magnet 92, and the support platform 5 is equipped with a magnet 91. The magnets 91 and 92 are magnetically attracted to each other, thus fixing the support platform 5 and the material trough 4. Both of the above methods allow the support platform 5 to be detachably connected to the material trough 4, facilitating the installation or removal of the material trough 4 and making it easier to clean the material trough 4.

[0053] The drive mechanism 2 of this utility model includes a drive unit and a vertical movement unit. The vertical drive unit drives the vertical movement unit so that the vertical movement unit can move the printing platform 1 up and down. The drive unit uses a stepper motor 21. The vertical movement unit includes a lead screw 26 and a lead screw nut 22. The stepper motor 21 is connected to the lead screw 26. The support platform 5 is fixed with a vertically arranged bracket 210. The bracket 210 is fixed with a mounting base 1 27 and a mounting base 29. The lead screw 26 is connected to the mounting base 1 27 and the mounting base 29. The lead screw nut 22 is connected to the lead screw 26. The stepper motor 21 drives the lead screw 26 to rotate, and the lead screw nut 22 reciprocates in the Z-axis direction on the lead screw 26. The lead screw nut 22 is fixed to a connecting plate 23 by screws. The connecting plate 23 is fixed to a slider 24 by screws. The bracket 210 is fixed to a guide rail 25 by screws. The slider 24 slides on the guide rail 25. The drive mechanism 2 is prior art, specifically referring to the invention patent application entitled "3D Printing Equipment" (application publication number: CN116353054A). An L-shaped platform support plate 28 is fixedly connected to the connecting plate 23 and the slider 24, and the printing platform 1 is mounted horizontally on the platform support plate 28.

[0054] The material spreading mechanism includes a moving component 31, an adjusting component, and a scraper 32. The moving component 31 includes a second guide rail 312 and a second slider 311. The second slider 311 moves linearly back and forth along the X-axis on the second guide rail 312. The moving component 31 is prior art; specifically, refer to the invention patent application entitled "3D Printing Equipment" (Publication No.: CN116353054A). The scraper 32 moves back and forth on a plane via the moving component 31. The scraper 32 is used to spread the material to be cured onto the printing platform 1 to form a material layer on the printing platform 1.

[0055] The adjustment assembly includes a scraper mounting plate 33 and a scraper adjustment plate 34. The scraper mounting plate 33 has connecting parts 331 at both ends. The cross-sectional area of ​​the connecting parts 331 is larger than that of the scraper mounting plate 33. The connecting parts 331 and the second slider 311 are fixedly connected by connecting bolts 6, which can improve the connection rigidity between the scraper mounting plate 33 and the second slider 311, prevent structural deformation caused by inertia or load during high-speed movement, and the bolt fixing method evenly transmits the force of the scraper 32 to the entire moving assembly 31, reducing local wear.

[0056] The scraper adjustment plate 34 and the scraper 32 are fixedly connected by screws and can be disassembled and replaced separately without disassembling the entire material spreading mechanism, thus reducing maintenance time and costs.

[0057] The scraper adjustment plate 34 has a first connector, which is a connecting post 35 that passes through the through hole of the scraper mounting plate 33. The first connector also has a second connector, which is a nut 36. The nut 36 is bolted to the connecting post 35. After the nut 36 is adjusted along the Z-axis on the connecting post 35, it is positioned on the scraper mounting plate 33 to prevent displacement of the scraper 32 due to vibration or material resistance during movement or material application, thus ensuring consistent printing layer thickness. By rotating the nut 36 on the connecting post 35, the scraper 32 can be precisely adjusted along the Z-axis to adapt to the application requirements of different materials and ensure uniform thickness of each layer.

[0058] Nut 36 limiting methods include: (1) such as Figure 2 As shown, the top surface of the scraper mounting plate 33 is coated with glue. After the nut 36 is adjusted along the Z-axis on the connecting column 35, it is directly fixed to the top surface of the scraper mounting plate 33 with glue. In this method, the glue cures quickly after application, so that the nut 36 is firmly bonded to the top surface of the scraper mounting plate 33 without the need for tools. (2) As Figure 3 and Figure 4 As shown, the connecting column 35 is threaded with a second nut 37. After the first nut 36 is adjusted along the Z-axis on the connecting column 35, it is attached to the top surface of the scraper mounting plate 33. Then, the second nut 37 is tightened, so that the first nut 36 is locked at the top surface of the scraper mounting plate 33, and the second nut 37 is locked at the bottom surface of the scraper mounting plate 33. In this method, the two-way locking of the first nut 36 and the second nut 37 forms a mechanical clamping force, which completely avoids displacement in the Z-axis direction. The stability is far superior to that of single nut fixing. Moreover, the first nut 36 is responsible for fine height adjustment, and the second nut 37 is responsible for locking. The two have a clear division of labor and support multiple adjustments without damaging the structure.

[0059] like Figures 7 to 10As shown, the scraper 32 has a cavity 322, an opening 321 at its bottom, and a through hole 323 at its top. The cavity 322 connects the opening 321 and the through hole 323. A tube 38 is located at the top of the scraper 32, extending towards the Z-axis. The scraper adjusting plate 34 has a mounting hole 341, and the scraper mounting plate 33 has a mounting hole 332. The tube 38 passes through both mounting holes 341 and 332. The tube 38 has a pipe hole 381, which connects to the through hole 323. When the scraper 32 moves, some resin is allowed to enter the cavity 322 from the opening 321 at the bottom, preventing excessive resin buildup in front of the scraper 32 and ensuring uniform layering.

[0060] The scraper 32 of this utility model can be integrally formed or assembled in sections. When assembled in sections, the scraper 32 includes a scraper main plate 324 and a scraper side plate 325. A reinforcing plate 326 is welded to the inner side of the scraper main plate 324. The scraper side plate 325 is welded to the scraper main plate 324, and the scraper side plate 325 is supported on the reinforcing plate 326 to improve the strength of the scraper 32.

[0061] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A 3D printing device, comprising: The printing platform is used to support the material layers; A drive mechanism, connected to the printing platform, is used to adjust the position of the printing platform in the Z-axis direction; A material spreading mechanism, comprising a moving component and a scraper, wherein the scraper reciprocates on a plane via the moving component, and the scraper is used to spread the material to be cured on the printing platform to form the material layer on the printing platform; The material spreading mechanism is characterized in that it further includes: An adjustment component is attached to the moving component, and the scraper is attached to the adjustment component. The adjustment component is used to adjust the position of the scraper in the Z-axis direction.

2. The 3D printing equipment according to claim 1, characterized in that: The adjustment assembly includes a scraper mounting plate and a scraper adjustment plate. The scraper mounting plate is fixed on the moving assembly. The scraper adjustment plate and the scraper are fixedly connected. The scraper adjustment plate is provided with a first connector and a second connector. The second connector can be adjusted in position along the Z-axis direction on the first connector and is limited on the scraper mounting plate.

3. The 3D printing equipment according to claim 2, characterized in that: The first connector is a connecting post that passes through the through hole of the scraper plate. The second connector is a nut that is bolted to the connecting post. After the nut is adjusted along the Z-axis on the connecting post, it is positioned on the scraper plate.

4. The 3D printing equipment according to claim 3, characterized in that: The nut is fixed to the top surface of the scraper plate with glue.

5. A 3D printing device according to claim 3, characterized in that: The connecting column is threaded with a second nut. The first nut is locked at the top surface of the scraper plate, and the second nut is locked at the bottom surface of the scraper plate.

6. A 3D printing device according to claim 2, characterized in that: The scraper has a cavity, an opening at the bottom, and a through hole at the top, with the cavity connecting the opening and the through hole.

7. A 3D printing device according to claim 6, characterized in that: The top of the scraper is provided with a tube, the tube has a hole, and the hole is connected to the through hole.

8. A 3D printing device according to claim 7, characterized in that: The tube extends in the Z-axis direction, the scraper adjustment plate is provided with a first mounting hole, the scraper hanging plate is provided with a second mounting hole, and the tube passes through the first mounting hole and the second mounting hole.

9. A 3D printing device according to claim 2, characterized in that: The moving component includes a second guide rail and a second slider. The second slider moves linearly back and forth on the second guide rail. The two ends of the scraper plate are provided with connecting parts. The cross-sectional area of ​​the connecting parts is larger than the cross-sectional area of ​​the scraper plate. The connecting parts and the second slider are fixedly connected by connecting bolts.

10. A 3D printing device according to claim 1, characterized in that: It also includes a material trough, which has a chamber with an opening. The printing platform moves vertically within the chamber through the opening. A support platform is provided on the top of the material trough, and the moving component is fixed on the support platform.

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