Silicon carbide 3D printing molding equipment and preparation process

Abstract

The present invention provides a silicon carbide 3D printing molding equipment and preparation process, including a base, the upper surface of the base is fixedly connected to a base, the upper surface of the base is fixedly connected to a processing table, the upper surface of the base is symmetrically fixedly connected to side panels, a top panel is fixedly connected between the top ends of the two side panels, and the upper surface of the top panel is fixedly installed with a vacuum material storage device and a material conveying device connected to each other. The silicon carbide 3D printing molding equipment and preparation process of the present invention can extract the air in the silicon carbide material in the silicon carbide storage box through the vacuum material storage device, which can avoid the situation where the material has air and bubbles in the printed object, thereby improving the printing effect, and through the nozzle switching device and connecting device, the operation of automatically switching the nozzle pipe can be realized without manual operation, which not only reduces the workload but also improves the work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing and molding, and in particular to a silicon carbide 3D printing and molding device and a preparation process. Background Art

[0002] Silicon carbide is an inorganic substance with the chemical formula SiC. It is made of quartz sand, petroleum coke (or coal coke), sawdust (salt is needed to produce green silicon carbide) and other raw materials through high-temperature smelting in a resistance furnace. Due to its brittle texture and high hardness, silicon carbide is difficult to process and shape, especially some complex structures (such as porous structures designed for lightweight).

[0003] The traditional method of preparing silicon carbide products has the following disadvantages: low preparation accuracy and difficulty in preparing parts with complex shapes, especially complex parts such as reflectors, which require precise processing molds and matching processing tools, resulting in high preparation costs. The use of 3D printing technology can overcome the above difficulties and is suitable for preparing any complex-shaped silicon carbide products, improving the lightweight rate of products, shortening processing cycles, reducing processing costs, and achieving near-net-shape molding;

[0004] However, when using existing silicon carbide 3D printing equipment, bubbles will be generated when heating due to the presence of air in the silicon carbide material. Therefore, when performing 3D printing, bubbles will often exist in the product, thus affecting the printing effect. In addition, when the printing equipment is in use, the nozzle is prone to clogging, and it is necessary to stop working and then manually replace the nozzle, which not only has a heavy workload but also reduces work efficiency. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides a silicon carbide 3D printing molding device and a preparation process, which solve the above-mentioned existing problems.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a silicon carbide 3D printing molding equipment, including a base, the upper surface of the base is fixedly connected to a base, the upper surface of the base is fixedly connected to a processing table, the upper surface of the base is symmetrically fixedly connected to side panels on both sides, a top plate is fixedly connected between the top ends of the two side panels, the upper surface of the top plate is fixedly installed with a vacuum material storage device and a material conveying device that are connected to each other, a top rod is fixedly connected to the center position of the lower surface of the top plate, an XYZ movable platform is fixedly installed on the bottom end of the top rod, the bottom end of the movable end of the XYZ movable platform is fixedly connected to a bottom rod, the bottom end of the bottom rod is fixedly connected to a cross plate, a nozzle switching device is fixedly installed on one side of the outer surface of the cross plate, a connecting device that cooperates with the nozzle switching device is fixedly installed on the lower surface of the cross plate, and the top end of the connecting device is connected to the output end of the material conveying device, and an operating table is fixedly installed on one side of the upper surface of the base.

[0009] Preferably, the vacuum material storage device includes a silicon carbide storage box fixedly mounted on the upper surface of the top plate, the silicon carbide storage box is a rectangular parallelepiped, the interior of the silicon carbide storage box is slidably connected to a piston plate, the upper surface of the piston plate is fixedly connected to a lead screw, the lead screw passes through the silicon carbide storage box and is threadedly connected to a threaded sleeve, the bottom of the threaded sleeve is rotatably connected to the upper surface of the silicon carbide storage box, a first motor is fixedly mounted on the top of the silicon carbide storage box, the output shaft of the first motor is fixedly connected to a gear, and the outer surface of the threaded sleeve is fixedly provided with a gear ring meshing with the gear.

[0010] Preferably, the vacuum material storage device also includes an air pump fixedly installed on the top of the silicon carbide storage box, the air suction end of the air pump is fixedly connected to a connecting pipe, one end of the connecting pipe passes through the piston plate, and a feeding pipe is fixedly connected to one side of the upper surface of the piston plate.

[0011] Preferably, the material conveying device includes a conveying pump fixedly mounted on the upper surface of the top plate, the input end of the conveying pump is fixedly communicated with the interior of the silicon carbide storage box, the output end of the conveying pump passes through the top plate and is connected to the top of the connecting device, and the connecting pipe, the feeding pipe and the input and output ends of the conveying pump are all fixedly mounted with solenoid valves.

[0012] Preferably, the nozzle switching device includes a second motor embedded and fixedly installed on one side of the horizontal plate, the output shaft of the second motor is fixedly connected to a turntable, the outer surface of the turntable is fixedly connected to two mutually perpendicular connecting blocks, the outer surface of the connecting block is fixedly connected to a nozzle tube, the inside of the nozzle tube is slidably connected to a sealing ring, the top of the sealing ring is fixedly connected to a moving tube, the top of the moving tube is fixedly connected to a connecting ring, an electric push rod is fixedly installed on one side of the outer surface of the nozzle tube, a push block is fixedly connected between the movable end of the electric push rod and the moving tube, a plurality of support rods are fixedly connected to the inside of the connecting ring in sequence, and one end of the plurality of support rods is fixedly connected to a center block.

[0013] Preferably, the connecting device includes a fixed block fixedly mounted on the lower surface of the transverse plate, the interior of the fixed block is sequentially provided with travel grooves and discharge grooves that are interconnected, the outer surface of the transverse plate is penetrated by a feed pipe that is fixedly connected to the travel groove, and the top of the feed pipe is connected to the output end of a conveying pump, the lower surface of the fixed block is provided with a connecting groove that is connected to the discharge groove, and the connecting groove cooperates with a connecting ring, two elastic sheets are symmetrically fixedly connected to the inner wall of the travel groove on both sides, a baffle that cooperates with the discharge groove is fixedly connected between one ends of the two elastic sheets, and the bottom end of the baffle is fixedly connected with a ejector pin that cooperates with the center block.

[0014] Preferably, a sealing gasket is embedded and installed inside the connecting groove.

[0015] A silicon carbide 3D printing preparation process, the silicon carbide 3D printing preparation process comprising:

[0016] Step 1: Add materials, add silicon carbide materials into the silicon carbide storage box through the feeding pipe;

[0017] Step 2: Vacuum the material and start the vacuum pump. The vacuum pump runs to extract the air in the silicon carbide storage box through the connecting pipe, so as to avoid the presence of air in the silicon carbide material and avoid bubbles during subsequent printing;

[0018] Step 3: Start the material conveying device, which conveys the silicon carbide material into the nozzle pipe;

[0019] Step 4: Perform 3D printing. Start the XYZ mobile platform according to the shape of the required object, and drive the nozzle tube to move up, down, left, right, and forward and backward, so that the ejected materials are piled up on the processing table in an orderly manner to achieve 3D printing.

[0020] (III) Beneficial effects

[0021] The present invention provides a silicon carbide 3D printing molding device and a preparation process. It has the following beneficial effects:

[0022] The silicon carbide 3D printing molding equipment and preparation process of the present invention can extract the air in the silicon carbide material in the silicon carbide storage box by means of the vacuum material storage device, so as to avoid the presence of air in the material and the presence of bubbles in the printed object, thereby improving the printing effect, and through the nozzle switching device and connecting device, the operation of automatically switching the nozzle pipe can be realized without manual operation, which not only reduces the workload but also improves the work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a partial structural stereogram of the present invention;

[0025] Figure 3 It is a partial structural schematic diagram of the present invention;

[0026] Figure 4 It is a schematic diagram of the internal structure of the nozzle pipe of the present invention;

[0027] Figure 5 A three-dimensional diagram of a connection switch of the present invention;

[0028] Figure 6 It is a schematic diagram of the internal structure of the fixing block of the present invention.

[0029] Among them, 1. base; 2. pedestal; 3. processing table; 4. side plate; 5. top plate; 6. push rod; 7. XYZ moving platform; 8. bottom rod; 9. cross plate; 10. operating table; 11. silicon carbide storage box; 12. piston plate; 13. screw rod; 14. threaded sleeve; 15. first motor; 16. gear; 17. gear ring; 18. vacuum pump; 19. connecting pipe; 20. feeding pipe; 21. conveying pump; 22. turntable; 23. connecting block; 24. nozzle pipe; 25. sealing ring; 26. moving pipe; 27. connecting ring; 28. electric push rod; 29. ​​push block; 30. support rod; 31. center block; 32. fixed block; 33. travel groove; 34. discharge groove; 35. feeding pipe; 36. connecting groove; 37. elastic sheet; 38. baffle; 39. ejector pin; 40. sealing gasket. DETAILED DESCRIPTION

[0030] The following will be combined with the 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 described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Example 1: Figure 1-6 As shown, an embodiment of the present invention provides a silicon carbide 3D printing molding device, including a base 1, the upper surface of the base 1 is fixedly connected to a base 2, the upper surface of the base 2 is fixedly connected to a processing table 3, the upper surface of the base 1 is symmetrically fixedly connected to side panels 4, a top plate 5 is fixedly connected between the top ends of the two side panels 4, the upper surface of the top plate 5 is fixedly installed with a vacuum material storage device and a material conveying device that are connected to each other, a top rod 6 is fixedly connected to the center position of the lower surface of the top plate 5, an XYZ moving platform 7 is fixedly installed at the bottom end of the top rod 6, a bottom end of the movable end of the XYZ moving platform 7 is fixedly connected to a bottom rod 8, a bottom end of the bottom rod 8 is fixedly connected to a cross plate 9, a nozzle switching device is fixedly installed on one side of the outer surface of the cross plate 9, a connecting device that matches the nozzle switching device is fixedly installed through the lower surface of the cross plate 9, and the top end of the connecting device is connected to the output end of the material conveying device, and an operating table 10 is fixedly installed on one side of the upper surface of the base 1.

[0032] The vacuum material storage device includes a silicon carbide storage box 11 fixedly mounted on the upper surface of the top plate 5. The silicon carbide storage box 11 is a rectangular parallelepiped. A piston plate 12 is slidably connected to the inside of the silicon carbide storage box 11. A screw rod 13 is fixedly connected to the upper surface of the piston plate 12. The screw rod 13 passes through the silicon carbide storage box 11 and is threadedly connected to a threaded sleeve 14. The bottom of the threaded sleeve 14 is rotatably connected to the upper surface of the silicon carbide storage box 11. A first motor 15 is fixedly mounted on the top of the silicon carbide storage box 11. The output shaft of the first motor 15 is fixedly connected to a gear 16. The outer surface of the threaded sleeve 14 is fixedly sleeved with a gear ring 17 meshing with the gear 16.

[0033] The vacuum material storage device also includes an air pump 18 fixedly installed on the top of the silicon carbide storage box 11. The air suction end of the air pump 18 is fixedly connected to a connecting pipe 19. One end of the connecting pipe 19 passes through the piston plate 12. A feeding pipe 20 is fixedly connected to one side of the upper surface of the piston plate 12.

[0034] The material conveying device includes a conveying pump 21 fixedly installed on the upper surface of the top plate 5. The input end of the conveying pump 21 is fixedly communicated with the interior of the silicon carbide storage box 11. The output end of the conveying pump 21 passes through the top plate 5 and is connected to the top of the connecting device. The connecting pipe 19, the feeding pipe 20 and the input and output ends of the conveying pump 21 are all fixedly installed with solenoid valves.

[0035] The nozzle switching device includes a second motor embedded and fixedly installed on one side of the horizontal plate 9, the output shaft of the second motor is fixedly connected to a turntable 22, the outer surface of the turntable 22 is fixedly connected to two mutually perpendicular connecting blocks 23, the outer surface of the connecting block 23 is fixedly connected to a nozzle tube 24, the inside of the nozzle tube 24 is slidably connected to a sealing ring 25, the top of the sealing ring 25 is fixedly connected to a moving tube 26, the top of the moving tube 26 is fixedly connected to a connecting ring 27, an electric push rod 28 is fixedly installed on one side of the outer surface of the nozzle tube 24, a push block 29 is fixedly connected between the movable end of the electric push rod 28 and the moving tube 26, a plurality of support rods 30 are fixedly connected to the inside of the connecting ring 27 in sequence, and one end of the plurality of support rods 30 is fixedly connected to a center block 31.

[0036] The connecting device includes a fixed block 32 fixedly mounted on the lower surface of the transverse plate 9, and the interior of the fixed block 32 is sequentially provided with a travel groove 33 and a discharge groove 34 that are interconnected. A feed pipe 35 connected to the travel groove 33 is fixedly connected to the outer surface of the transverse plate 9, and the top of the feed pipe 35 is connected to the output end of the conveying pump 21. A connecting groove 36 connected to the discharge groove 34 is provided on the lower surface of the fixed block 32, and the connecting groove 36 cooperates with the connecting ring 27. Two elastic sheets 37 are symmetrically fixedly connected to the inner wall of the travel groove 33 on both sides, and a baffle 38 that cooperates with the discharge groove 34 is fixedly connected between one ends of the two elastic sheets 37, and a top end of the baffle 38 is fixedly connected to a pin 39 that cooperates with the center block 31.

[0037] A sealing gasket 40 is embedded and installed inside the connecting groove 36 .

[0038] Working principle: When in use, first add silicon carbide material into the silicon carbide storage box 11, then start the vacuum pump 18 to extract the air in the silicon carbide material, so as to avoid bubbles in the printed object due to the presence of air, thereby improving the printing effect, and then start the first motor 15 and the delivery pump 21. The first motor 15 drives the threaded sleeve 14 to rotate through the gear 16 and the gear ring 17, thereby driving the screw rod 13 and the piston plate 12 to move downward to extrude the silicon carbide material. The delivery pump 21 can deliver the silicon carbide material to the nozzle pipe 24 for ejection, and then start the XYZ mobile platform 7 to drive the nozzle pipe 24 to move in all directions, thereby realizing 3D printing. When the nozzle pipe 24 is blocked, just start The electric push rod 28 on the nozzle tube 24 is blocked so that the connecting ring 27 thereon moves out of the connecting groove 36. At this time, the baffle 38 will move downward under the action of the elastic sheet 37, thereby blocking the discharge trough 34 to prevent the silicon carbide material from leaking out. Then the second motor is started, and the rotation of the second motor drives the turntable 22 to rotate, thereby rotating the other nozzle tube 24 to the bottom of the fixed block 32. Then the electric push rod 28 thereon is started, which can drive the connecting ring 27 thereon to enter the connecting groove 36 at the bottom of the fixed block 32, and when entering, the ejector pin 39 will be squeezed through the center block 31, thereby lifting the baffle 38 and realizing the opening of the discharge trough 34. There is no need to stop the machine to manually replace the nozzle tube 24, which is convenient and practical, reduces the workload, and improves the work efficiency.

[0039] Example 2: Figure 1-6 As shown, a silicon carbide 3D printing preparation process, the silicon carbide 3D printing preparation process includes:

[0040] Step 1: Add materials, add silicon carbide materials into the silicon carbide storage box 11 through the feeding pipe 20;

[0041] Step 2: vacuum the material and start the vacuum pump 18. The vacuum pump 18 operates to extract the air in the silicon carbide storage box 11 through the connecting pipe 19, thereby avoiding the presence of air in the silicon carbide material and avoiding bubbles during subsequent printing;

[0042] Step 3: Start the material conveying device, which conveys the silicon carbide material into the nozzle pipe 24;

[0043] Step 4: Perform 3D printing. Start the XYZ mobile platform 7 according to the shape of the required object, and drive the nozzle tube 24 to move up, down, left, right, and forward and backward, so that the ejected materials are orderly accumulated on the processing table 3 to achieve 3D printing.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprising a reference structure" do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A silicon carbide 3D printing molding device, comprising a base, characterized in that: The upper surface of the base is fixedly connected with a pedestal, the upper surface of the base is fixedly connected with a processing table, the upper surfaces of the base are symmetrically fixedly connected with side panels, a top plate is fixedly connected between the top ends of the two side plates, a vacuum material storage device and a material conveying device connected to each other are fixedly installed on the upper surface of the top plate, a top rod is fixedly connected to the center position of the lower surface of the top plate, an XYZ moving platform is fixedly installed on the bottom end of the top rod, a bottom end of the movable end of the XYZ moving platform is fixedly connected with a bottom rod, a cross plate is fixedly connected to the bottom end of the bottom rod, a nozzle switching device is fixedly installed on one side of the outer surface of the cross plate, a connecting device matched with the nozzle switching device is fixedly installed through the lower surface of the cross plate, and the top end of the connecting device is connected to the output end of the material conveying device, and an operating table is fixedly installed on one side of the upper surface of the base; The nozzle switching device includes a second motor embedded and fixedly installed on one side of the horizontal plate, the output shaft of the second motor is fixedly connected to a turntable, the outer surface of the turntable is fixedly connected to two mutually perpendicular connecting blocks, the outer surface of the connecting block is fixedly connected to a nozzle pipe, the inside of the nozzle pipe is slidably connected to a sealing ring, the top of the sealing ring is fixedly connected to a moving tube, the top of the moving tube is fixedly connected to a connecting ring, an electric push rod is fixedly installed on one side of the outer surface of the nozzle pipe, a push block is fixedly connected between the movable end of the electric push rod and the moving tube, a plurality of support rods are fixedly connected to the inside of the connecting ring in sequence, and one end of the plurality of support rods is fixedly connected to a center block.

2. A silicon carbide 3D printing molding device according to claim 1, characterized in that: The vacuum material storage device includes a silicon carbide storage box fixedly mounted on the upper surface of a top plate. The silicon carbide storage box is a rectangular parallelepiped. A piston plate is slidably connected to the inside of the silicon carbide storage box. A lead screw is fixedly connected to the upper surface of the piston plate. The lead screw passes through the silicon carbide storage box and is threadedly connected to a threaded sleeve. The bottom of the threaded sleeve is rotatably connected to the upper surface of the silicon carbide storage box. A first motor is fixedly mounted on the top of the silicon carbide storage box. A gear is fixedly connected to the output shaft of the first motor. A gear is fixedly mounted on the outer surface of the threaded sleeve. A gear ring meshing with the gear is fixedly mounted on the outer surface of the threaded sleeve.

3. A silicon carbide 3D printing molding device according to claim 2, characterized in that: The vacuum material storage device also includes an air pump fixedly installed on the top of the silicon carbide storage box. The air pump end is fixedly connected to a connecting pipe, one end of the connecting pipe passes through the piston plate, and a feeding pipe is fixedly connected to one side of the upper surface of the piston plate.

4. A silicon carbide 3D printing molding device according to claim 3, characterized in that: The material conveying device includes a conveying pump fixedly installed on the upper surface of the top plate. The input end of the conveying pump is fixedly communicated with the interior of the silicon carbide storage box. The output end of the conveying pump passes through the top plate and is connected to the top of the connecting device. The connecting pipe, the feeding pipe and the input and output ends of the conveying pump are all fixedly installed with solenoid valves.

5. A silicon carbide 3D printing molding device according to claim 4, characterized in that: The connecting device includes a fixed block fixedly installed on the lower surface of the transverse plate, and the interior of the fixed block is sequentially provided with a travel groove and a discharge groove that are interconnected, and the outer surface of the transverse plate is penetrated and fixedly connected with a feed pipe connected to the travel groove, and the top of the feed pipe is connected to the output end of the conveying pump, and the lower surface of the fixed block is provided with a connecting groove connected to the discharge groove, and the connecting groove cooperates with the connecting ring, and two elastic sheets are symmetrically fixedly connected to the inner wall of the travel groove on both sides, and a baffle that cooperates with the discharge groove is fixedly connected between one ends of the two elastic sheets, and the bottom end of the baffle is fixedly connected with a ejector pin that cooperates with the center block.

6. A silicon carbide 3D printing molding device according to claim 5, characterized in that: A sealing gasket is embedded and installed inside the connecting groove.

7. A silicon carbide 3D printing preparation process, characterized in that: A silicon carbide 3D printing molding device according to any one of claims 1 to 6 is used, and the silicon carbide 3D printing preparation process includes: Step 1: Add materials, add silicon carbide materials into the silicon carbide storage box through the feeding pipe; Step 2: Vacuum the material and start the vacuum pump. The vacuum pump runs to extract the air in the silicon carbide storage box through the connecting pipe, so as to avoid the presence of air in the silicon carbide material and avoid bubbles during subsequent printing; Step 3: Start the material conveying device, which conveys the silicon carbide material into the nozzle pipe; Step 4: Perform 3D printing. Start the XYZ mobile platform according to the shape of the required object, and drive the nozzle tube to move up, down, left, right, and forward and backward, so that the ejected materials are piled up on the processing table in an orderly manner to achieve 3D printing.

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