Ceramic 3d printing spreading device

Abstract

The utility model relates to a kind of ceramic 3D printing material spreading device, belong to material spreading device technical field.The device solves the problem that the poor uniformity of ceramic slurry leads to unstable printing density and surface quality.The technical scheme includes base frame, screw rod, sliding seat and scraper, tank is set on base frame, tank top installs tank cover and stirring assembly, controllable heating assembly is equipped on tank outer wall, and base frame top is connected with material conveying assembly.When using, stirring assembly prevents slurry particle deposition stratification, heating assembly maintains slurry fluidity, material conveying assembly transports slurry to the position of scraper, and sliding seat drives scraper to move to complete material spreading.The device improves slurry uniformity and printing quality through helical stirring blade and nickel-chromium alloy resistance wire and other structures.

Description

Technical Field

[0001] This utility model relates to the field of material laying device technology, and in particular to a ceramic 3D printing material laying device. Background Technology

[0002] Ceramic 3D printing technology creates complex three-dimensional structures by layer-by-layer deposition of ceramic materials and has wide applications in various fields. During the printing process, the high viscosity of the ceramic slurry makes it prone to sedimentation and stratification of solid particles, leading to poor slurry uniformity. This fluctuation in uniformity causes unstable material density, affecting the density and surface quality of the finished product, thus reducing product performance and yield. Existing material placement devices struggle to effectively address these issues, limiting printing quality.

[0003] To address the aforementioned issues, this utility model document proposes a ceramic 3D printing material placement device. Utility Model Content

[0004] This invention provides a ceramic 3D printing material laying device, which solves the problem in the prior art where fluctuations in slurry uniformity lead to unstable material density, which in turn affects the density and surface quality of the finished product, reducing product performance and yield.

[0005] This utility model provides the following technical solution:

[0006] A ceramic 3D printing layup apparatus, comprising:

[0007] The base frame has the same screw rotatably mounted on both ends of its inner wall via bearings. A matching sliding seat is threaded onto the screw. A scraper for spreading material is detachably mounted on one side of the sliding seat. A first drive motor is fixedly mounted on the outer wall of the base frame. The output shaft of the first drive motor passes through the inner wall of the base frame and is fixedly connected to one end of the screw.

[0008] A material tank is provided on the top of the base frame, and a tank cover is threadedly connected to the opening of the tank. A stirring assembly is provided on the tank cover, a controllable heating assembly is provided on the material tank, and a material conveying assembly is provided on the top of the base frame.

[0009] In one possible design, a limiting block is fixedly provided on the other side of the sliding seat to improve its movement stability. A sliding groove for sliding connection of the limiting block is provided on the inner wall of the base frame. The scraper is engaged with the groove on the side wall of the sliding seat by a protrusion fixed on one side. A bolt for reinforcement is threaded to the top of the sliding seat.

[0010] In one possible design, the stirring assembly includes a stirring rod rotatably mounted at the center of the bottom of the tank lid via a bearing, a spiral stirring blade fixedly mounted on the stirring rod, and a second drive motor fixedly mounted on the top of the tank lid, the output shaft of the second drive motor passing through the inner wall of the tank lid and fixedly connected to the top of the stirring rod.

[0011] In one possible design, the controllable heating assembly includes a heating jacket wrapped around the outer wall of the tank, with a nickel-chromium alloy resistance wire wound and fixed on the inner wall of the heating jacket, and a PID temperature control module electrically connected to the input end of the heating jacket, the PID temperature control module being fixed to the top of the base frame by bolts.

[0012] In one possible design, a heat insulation pad is fixedly installed at the bottom of the tank, and the bottom of the heat insulation pad is fixedly connected to the top of the base frame.

[0013] In one possible design, the material conveying assembly includes a material pump fixedly installed on the top of the base frame. The input end of the material pump is connected to the inner wall of the material tank through a material extraction pipe. A vertical through-hole is provided in the center of the scraper. A discharge nozzle is installed in the through-hole by bolts. The output end of the material pump is connected to the input end of the discharge nozzle through a material conveying hose.

[0014] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the present invention.

[0015] The working principle and usage process of this technical solution are as follows:

[0016] In use, open the can lid, add ceramic slurry to the can, then tighten the lid. After that, start the second drive motor. Its output shaft drives the stirring rod and spiral stirring blade to rotate, stirring the ceramic slurry in the can, disrupting the settling tendency of solid particles, preventing the solid particles in the slurry from settling and stratifying, ensuring the uniformity of the slurry. In addition, according to the process requirements, the PID temperature control module controls the nickel-chromium alloy resistance wire in the heating jacket to heat the slurry in the can to a suitable temperature (such as between 25℃ and 40℃) to maintain the stability of the slurry's fluidity.

[0017] After the material pump is started, it draws the slurry from the tank through the extraction pipe and delivers it to the outlet nozzle via the delivery hose. The slurry flows from the outlet nozzle through the through-hole of the scraper to the printing platform. Then, the first drive motor is started, and its output shaft drives the screw to rotate. The sliding seat on the screw moves along the screw under the action of the thread, and the limiting block slides in the groove to improve the stability of the sliding seat movement. As the sliding seat moves, the scraper evenly spreads the flowing slurry on the local processing area of ​​the printing platform (the diameter of this area is smaller than the length of the outlet nozzle), completing the laying of one layer of ceramic slurry. After one layer is laid, the corresponding curing operations are performed according to the process requirements of 3D printing. Then, the above steps are repeated to lay slurry layer by layer until the printing of the entire ceramic product is completed.

[0018] This utility model has the following beneficial effects:

[0019] This invention uses the spiral stirring blades of the stirring component to stir the ceramic slurry, effectively preventing the sedimentation and stratification of solid particles in the slurry, ensuring the uniformity of the slurry, thereby reducing the fluctuation of material density during the printing process, improving the density and surface quality of the finished product, and the controllable heating component can heat the slurry as needed, and the temperature is precisely controlled by the PID temperature control module to keep the slurry with appropriate fluidity, further reducing the fluctuation of slurry uniformity and facilitating the smooth progress of the material spreading operation.

[0020] In this invention, the scraper blade is engaged with the groove of the sliding seat by a protrusion and reinforced with bolts, which facilitates the disassembly and replacement of the scraper blade, makes maintenance easier, and allows for the selection of the appropriate scraper blade according to different printing needs. The sliding seat is equipped with a limiting block that cooperates with the sliding groove on the inner wall of the base frame, which improves the stability of the sliding seat movement and ensures that the scraper blade can smoothly spread the material. Attached Figure Description

[0021] Figure 1 A three-dimensional structural schematic diagram of a ceramic 3D printing material laying device provided in an embodiment of this utility model;

[0022] Figure 2 Another perspective structural schematic diagram of a ceramic 3D printing material laying device provided in an embodiment of this utility model;

[0023] Figure 3 This is a schematic diagram of the disassembly structure of a ceramic 3D printing material laying device provided in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the internal structure of the material tank of a ceramic 3D printing material laying device provided in an embodiment of the present invention.

[0025] Reference numerals in the attached drawings: 1. Base frame; 2. Screw; 3. First drive motor; 4. Sliding seat; 5. Limiting block; 6. Slide groove; 7. Scraper; 8. Protrusion; 9. Groove; 10. Heat insulation pad; 11. Material tank; 12. Tank cover; 13. Stirring rod; 14. Spiral stirring blade; 15. Second drive motor; 16. Heating jacket; 17. PID temperature control module; 18. Material pump; 19. Extraction pipe; 20. Conveying hose; 21. Through port; 22. Discharge nozzle. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0027] In the description of this utility model, it should be understood that the terms "opening", "upper", "middle", "length", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] To keep the following description of the embodiments of this utility model clear and concise, detailed descriptions of known functions and known components are omitted.

[0029] In one embodiment: Please refer to Figures 1-4 A material spreading device, comprising:

[0030] The system includes a base frame 1. Both ends of the inner wall of the base frame 1 are rotatably mounted with the same screw 2 via bearings. The screw 2 is threadedly connected to a matching sliding seat 4. A scraper 7 for spreading material is detachably mounted on one side of the sliding seat 4. The scraper 7 can be of various shapes, such as rectangular, arc-shaped, or wavy, to adapt to the surface contours of different printing platforms. The scraper 7 is engaged with a groove 9 on the side wall of the sliding seat 4 by a protrusion 8 fixedly mounted on one side, and is reinforced by a bolt threaded on the top of the sliding seat 4 to ensure the stable installation of the scraper 7. A first drive motor 3 is fixedly mounted on the outer wall of the base frame 1. The output shaft of the first drive motor 3 passes through the inner wall of the base frame 1 and is fixedly connected to one end of the screw 2 to drive the screw 2 to rotate.

[0031] A material tank 11 is provided on the top of the base frame 1. A tank cover 12 is threadedly connected to the opening of the top of the material tank 11. A stirring assembly is provided on the tank cover 12 for stirring the ceramic slurry in the material tank 11. The stirring assembly includes a stirring rod 13 rotatably mounted on the bottom center of the tank cover 12 via a bearing. A spiral stirring blade 14 is fixedly mounted on the stirring rod 13. A second drive motor 15 is fixedly mounted on the top of the tank cover 12. The output shaft of the second drive motor 15 passes through the inner wall of the tank cover 12 and is fixedly connected to the top of the stirring rod 13. When the second drive motor 15 is started, its output shaft drives the stirring rod 13 and the spiral stirring blade 14 to rotate, stirring the ceramic slurry in the material tank 11, disrupting the sedimentation tendency of solid particles, and preventing solid particles from settling and stratifying.

[0032] The material tank 11 is also equipped with a controllable heating component for heating the slurry as needed. The controllable heating component includes a heating sleeve 16 that wraps around the outer wall of the material tank 11. A nickel-chromium alloy resistance wire is wound and fixed on the inner wall of the heating sleeve 16. A platinum resistance temperature sensor is pre-installed on the tank wall of the material tank 11, and its resistance responds linearly to temperature changes. A programmable PID temperature control module 17 is electrically connected to the input terminal of the heating sleeve 16. The PID temperature control module 17 is fixed to the top of the base frame 1 by bolts. The sensor output terminal is connected to the analog input interface of the PID temperature control module 17. The module has a built-in 24... The Δ-Σ type ADC converter converts the resistance signal into a digital temperature value to monitor the temperature inside the tank in real time. The module has a built-in microprocessor to perform digital PID calculations. The output of the PID temperature control module 17 drives the bidirectional thyristor through optocoupler isolation to control the conduction angle of the power supply circuit of the heating jacket 16, thereby accurately controlling the temperature of the heating jacket 16 and keeping the slurry in the tank 11 with appropriate fluidity. In order to reduce the heat conduction of the heating jacket 16 to the base frame 1, a thick ceramic fiber heat insulation pad 10 is fixedly installed at the bottom of the tank 11. The bottom of the heat insulation pad 10 is fixedly connected to the top of the base frame 1.

[0033] The top of the base frame 1 is also equipped with a material conveying assembly, which is used to convey the slurry in the material tank 11 to the scraper 7 for spreading. The material conveying assembly includes a material pump 18 fixedly installed on the top of the base frame 1. The material pump 18 is a pneumatic diaphragm pump. The diaphragm material inside the pump body is a metal diaphragm with a surface hardness of HRA85 or higher and an inner ceramic coating, which is used to deal with high hardness ceramic particles (such as alumina and silicon carbide slurry). The valve ball is made of tungsten carbide hard alloy and the valve seat is made of polyetheretherketone (PEEK) based composite material, thereby improving the wear resistance of the pump body as a whole.

[0034] The input end of the material pump 18 is connected to the inner wall of the material tank 11 through the material extraction pipe 19. A through-hole 21 is vertically provided in the center of the scraper 7. A discharge nozzle 22 is installed in the through-hole 21 by bolts. The output end of the material pump 18 is connected to the input end of the discharge nozzle 22 through the material conveying hose 20. When the material pump 18 is started, it extracts the slurry in the material tank 11 through the material extraction pipe 19 and delivers it to the discharge nozzle 22 through the material conveying hose 20. The slurry flows out from the discharge nozzle 22 through the through-hole 21 of the scraper 7 to the printing platform.

[0035] In actual use, the user opens the can lid 12, adds ceramic slurry to the material tank 11, and then tightens the can lid 12. After that, the second drive motor 15 is started to stir the ceramic slurry in the material tank 11. According to the process requirements, the heating jacket 16 is controlled by the PID temperature control module 17 to heat the slurry. After the material pump 18 is started, the slurry flows out from the outlet 22 to the printing platform. Then the first drive motor 3 is started to drive the screw 2 to rotate, so that the sliding seat 4 and the scraper 7 move along the direction of the screw 2, and spread the flowing slurry evenly on the local processing area of ​​the printing platform (the diameter of this area is smaller than the length of the outlet). After one layer of material is laid, the corresponding curing and other operations are performed according to the process requirements of 3D printing. Then the above steps are repeated to lay the slurry layer by layer until the printing of the entire ceramic product is completed.

[0036] This application can be used for ceramic 3D printing, or for other fields applicable to this application.

[0037] In another embodiment: a ceramic 3D printing layup apparatus, which is used in the field of layup apparatus;

[0038] Please refer to Figure 2 To improve the stability of the sliding seat 4, a limiting block 5 is fixedly installed on the other side of the sliding seat 4. A groove 6 for sliding connection of the limiting block 5 is provided on the inner wall of the base frame 1. When the screw 2 rotates, the sliding seat 4 moves along the screw 2 under the action of the thread, and at the same time the limiting block 5 slides in the groove 6 to ensure that the scraper 7 smoothly spreads the material.

[0039] However, as is well known to those skilled in the art, the working principles and wiring methods of the first drive motor 3, the second drive motor 15, the heating jacket 16, the PID temperature control module 17, and the material pump 18 are commonplace and belong to conventional methods or common knowledge. They will not be described in detail here. Those skilled in the art can make any selections according to their needs or convenience.

[0040] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.

[0041] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. In the absence of conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A ceramic 3D printing material placement device, characterized in that, include: The base frame (1) has the same screw (2) rotatably mounted on both ends of the inner wall of the base frame (1) through bearings. The screw (2) is threaded with a matching sliding seat (4). A scraper (7) for spreading material is detachably provided on one side of the sliding seat (4). A first drive motor (3) is fixedly installed on the outer wall of the base frame (1). The output shaft of the first drive motor (3) passes through the inner wall of the base frame (1) and is fixedly connected to one end of the screw (2). The base frame (1) is provided with a material tank (11) at the top. A tank cover (12) is threadedly connected to the opening of the material tank (11). A stirring assembly is provided on the tank cover (12). A controllable heating assembly is provided on the material tank (11). A material conveying assembly is provided on the top of the base frame (1).

2. The ceramic 3D printing material placement device according to claim 1, characterized in that, A limiting block (5) for improving its movement stability is fixedly provided on the other side of the sliding seat (4). A sliding groove (6) for sliding connection of the limiting block (5) is provided on the inner wall of the base frame (1). The scraper (7) is engaged with the groove (9) on the side wall of the sliding seat (4) by a protrusion (8) fixedly provided on one side. A bolt for reinforcement is threadedly connected to the top of the sliding seat (4).

3. The ceramic 3D printing material placement device according to claim 1, characterized in that, The stirring assembly includes a stirring rod (13) that is rotatably mounted on the bottom center of the tank cover (12) via a bearing. A spiral stirring blade (14) is fixedly mounted on the stirring rod (13). A second drive motor (15) is fixedly mounted on the top of the tank cover (12). The output shaft of the second drive motor (15) passes through the inner wall of the tank cover (12) and is fixedly connected to the top of the stirring rod (13).

4. A ceramic 3D printing material placement device according to claim 3, characterized in that, The controllable heating assembly includes a heating sleeve (16) wrapped around the outer wall of the material tank (11). A nickel-chromium alloy resistance wire is wound and fixed on the inner wall of the heating sleeve (16). The input end of the heating sleeve (16) is electrically connected to a PID temperature control module (17). The PID temperature control module (17) is fixed to the top of the base frame (1) by bolts.

5. A ceramic 3D printing material placement device according to claim 4, characterized in that, A heat insulation pad (10) is fixedly installed at the bottom of the material tank (11), and the bottom of the heat insulation pad (10) is fixedly connected to the top of the base frame (1).

6. A ceramic 3D printing material placement device according to claim 4, characterized in that, The material conveying assembly includes a material pump (18) fixedly installed on the top of the base frame (1). The input end of the material pump (18) is connected to the inner wall of the material tank (11) through a material extraction pipe (19). A through-hole (21) is vertically provided in the center of the scraper (7). A discharge nozzle (22) is installed in the through-hole (21) by bolts. The output end of the material pump (18) is connected to the input end of the discharge nozzle (22) through a material conveying hose (20).

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