Fused deposition modeling equipment for 3D printing

Abstract

The invention discloses fused deposition modeling equipment for 3D printing, and relates to the field of 3D printing equipment, the fused deposition modeling equipment comprises a melting module, a feeding module and a conveying module, the melting module comprises a heating cylinder and a first discharging hopper, one end of the heating cylinder is fixedly connected with the first discharging hopper, and four sets of partition plates are fixedly connected into the heating cylinder; and a plurality of through holes are formed in the surfaces of the partition plates, and four sets of temperature sensors are arranged at the upper end in the heating cylinder. According to the invention, the shells of the heating cylinder and the conveying cylinder are thickened, so that the heat preservation and insulation effects are improved, the internal heat cannot be lost, the feeding blockage of raw materials caused by sudden temperature drop and viscosity rise in the feeding process is effectively prevented, and the whole printing process is guaranteed to be completed at one step; and the surface roughness is extremely low, so that the friction force between the material and the pipe wall is reduced, and the material flows in the pipeline more smoothly and efficiently.

Description

Technical Field

[0001] The present invention relates to the field of 3D printing equipment, and in particular to a fused deposition modeling equipment for 3D printing. Background Art

[0002] With the booming manufacturing industry today, 3D printing technology has spread rapidly like wildfire. Fused deposition modeling (FDM) has been widely used in many fields due to its outstanding advantages such as affordable cost and easy operation.

[0003] In the critical link of material melting, the existing fused deposition modeling equipment often fails to evenly cover the heat, causing some materials to be overheated and damaged or fail to fully melt. In addition, the material feeding continuity is poor and interruptions occur frequently, which greatly slows down the printing process, reduces overall production efficiency, and makes the quality of the printed products low. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a fused deposition modeling device for 3D printing.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a fused deposition modeling device for 3D printing, comprising a melting module, a feeding module and a feeding module, the melting module comprising a heating cylinder and a first discharge funnel, one end of the heating cylinder is fixedly connected to the first discharge funnel, four groups of dividing plates are fixedly connected inside the heating cylinder, and the surface of the dividing plates are provided with a plurality of through holes, and the diameters of the through holes on the four groups of dividing plates decrease successively, four groups of temperature sensors are provided at the upper end of the heating cylinder, and the temperature sensors are all located on the side of the dividing plate close to the first discharge funnel, four groups of first heating plate groups are provided inside the heating cylinder, one end of the heating cylinder is fixedly connected to the first sealing plate, and the outer surface of the sealing plate is fixedly connected to the first mounting seat, the middle part of the first mounting seat is fixedly connected to the first motor, the output end of the first motor is fixedly connected to the rotating shaft, and the rotating shaft passes through the first sealing plate and is rotatably connected to the middle part of the heating cylinder, and the rotating shaft is rotatably connected to the middle part of the four groups of dividing plates, four groups of spiral blades are fixedly connected to the surface of the rotating shaft, and one end of the spiral blade is rotatably connected to the middle part of the first discharge funnel.

[0006] As a further description of the above technical solution: The feeding module comprises a feeding pipe and a feeding hopper. The feeding pipe is fixedly connected to the upper part of one end of the heating cylinder away from the first discharging funnel. The feeding pipe is connected to the middle part of the heating cylinder.

[0007] As a further description of the above technical solution: A feeding funnel is fixedly connected to the upper end of the feeding pipe, and the cross-section of the feeding funnel is funnel-shaped, and the end with a smaller diameter of the feeding funnel is connected to the upper end of the feeding pipe, and a second mounting seat is fixedly connected to the inner surface of the feeding funnel, a second motor is fixedly connected to the middle of the second mounting seat, and a stirring shaft is fixedly connected to the output end of the second motor.

[0008] As a further description of the above technical solution: The stirring shaft surface is fixedly connected with three groups of stirring arms, a group of stirring arms close to the second motor is rotatably connected to the inside of the lower end of the feed funnel, and two groups of stirring arms away from the second motor are rotatably connected to the middle of the feed pipe.

[0009] As a further description of the above technical solution: The feeding module includes a feeding cylinder and a second discharge funnel. The first discharge funnel is fixedly connected to one side of one end of the feeding cylinder, and the first discharge funnel is connected to the inside of the feeding cylinder. A plurality of second heating plate groups are fixedly connected to the inner shell of the feeding cylinder.

[0010] As a further description of the above technical solution: A second sealing plate is fixedly connected to one end of the feed barrel near the first discharging funnel, a third mounting seat is fixedly connected to the outer surface of the second sealing plate, a third motor is fixedly connected to the middle of the third mounting seat, a transmission shaft is fixedly connected to the output end of the third motor, and the transmission shaft passes through the second sealing plate and is rotatably connected to the inside of the feed barrel, a precision screw is fixedly connected to the surface of the transmission shaft, and the precision screw is rotatably connected to the inside of the feed barrel.

[0011] As a further description of the above technical solution: The end of the conveying cylinder away from the first discharging funnel is fixedly connected to the second discharging funnel, the end of the second discharging funnel away from the conveying cylinder is threadedly connected to a connecting pipe, the end of the connecting pipe away from the conveying cylinder is fixedly connected to a feeding pipe, the lower end of the feeding pipe is fixedly connected to a solenoid valve, and a group of second heating plates are arranged inside the second discharging funnel.

[0012] As a further description of the above technical solution: Both ends of the outer surface of the heating cylinder are fixedly connected to the first support seat, and both ends of the outer surface of the feeding cylinder are fixedly connected to the second support seat.

[0013] The present invention has the following beneficial effects: 1. In the present invention, the first motor drives the spiral blade to rotate through the rotating shaft, so that the spiral blade transports the raw material to move inside the heating cylinder. The movement of the material can be restricted by the first heating plate group. Only the raw material melted to the corresponding state can pass through the corresponding heating cylinder. A plurality of heating partitions are arranged inside the heating cylinder, and the heating cylinder is finely divided into a plurality of heating areas. Each heating partition is separated by a partition plate. Each area is equipped with a temperature sensor and a first heating plate group. The temperature data of each area is collected in real time, and the heating power of each area is finely regulated. The closer to the first discharge funnel, the smaller the diameter of the through hole on the partition plate, and the farther away from the first discharge funnel, the higher the temperature in the heating area, thereby accelerating the melting of the raw material. The closer to the first discharge funnel, the smaller the temperature difference in the heating area, which ensures the stability of the raw material transition state, so that the raw material is continuously melted in the process of moving, and the fluidity becomes higher, and can pass through the first heating plate group with a smaller diameter, ensuring that the material can be bathed in a uniform and suitable heat environment throughout the melting process, completely eliminating the defects of local overheating or poor melting, and laying a solid foundation for high-quality printing.

[0014] 2. In the present invention, a continuous feeding mode is adopted through the coordinated operation of the heating cylinder and the feeding cylinder. The raw material is first heated inside the heating cylinder to make it molten. A spiral blade is used inside the heating cylinder. The spiral blade has a larger pitch design and has a strong conveying capacity. It can quickly push the raw material into the feeding cylinder to ensure the timeliness of material supply and avoid printing stagnation due to slow material conveying. A precision screw is arranged inside the feeding cylinder. The pitch of the precision screw is relatively small, focusing on the precise control of the material flow rate. The spiral blade and the precision screw have clear division of labor, and the two work closely together to ensure that the feeding is stable and uninterrupted like a gurgling stream, and to ensure that the feeding speed is perfectly matched with the extrusion speed of the nozzle to achieve uniform and stable wire extrusion.

[0015] 3. The shells of the heating cylinder and the feed cylinder are thickened to improve the thermal insulation effect, so that the internal heat will not be lost, effectively preventing the raw materials from being stuck due to a sudden drop in temperature and an increase in viscosity during the feeding process, ensuring that the entire printing process is completed in one go. The inner surfaces of the heating cylinder and the feed cylinder are ultra-smoothly treated with extremely low surface roughness, which reduces the friction between the material and the pipe wall, making the flow of the material in the pipeline smoother and more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A perspective view of the present invention; Figure 2 It is a cross-sectional three-dimensional structural diagram of the melting module of the present invention; Figure 3 It is a cross-sectional perspective view of the heating tube of the present invention; Figure 4 It is a cross-sectional three-dimensional structural diagram of the feed module of the present invention; Figure 5 It is a cross-sectional three-dimensional structural diagram of the feeding module of the present invention; Figure 6 It is a cross-sectional three-dimensional structural diagram of the feeding tube of the present invention.

[0017] Legend: 1. Melting module; 11. Heating cylinder; 111. Temperature sensor; 112. First heating plate group; 113. Partition plate; 12. First discharge hopper; 13. First mounting seat; 14. First motor; 15. Rotating shaft; 16. Spiral blade; 17. First support seat; 2. Feeding module; 21. Feeding pipe; 22. Feeding hopper; 23. Second mounting seat; 24. Second motor; 25. Stirring shaft; 26. Stirring arm; 3. Feeding module; 31. Feeding cylinder; 32. Second discharge hopper; 33. Connecting pipe; 34. Feeding pipe; 341. Solenoid valve; 35. Second heating plate group; 36. Third mounting seat; 361. Third motor; 37. Transmission shaft; 38. Precision screw; 39. Second support seat. DETAILED DESCRIPTION

[0018] 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.

[0019] Reference Figure 1-6 An embodiment of the present invention is as follows: a fused deposition modeling device for 3D printing, comprising a melting module 1, a feeding module 2 and a feeding module 3, wherein the melting module 1 comprises a heating cylinder 11 and a first discharge funnel 12, wherein one end of the heating cylinder 11 is fixedly connected to the first discharge funnel 12, wherein four groups of partition plates 113 are fixedly connected inside the heating cylinder 11, and the surfaces of the partition plates 113 are all provided with a plurality of through holes, and the diameters of the through holes on the four groups of partition plates 113 are successively reduced, and four groups of temperature sensors 111 are arranged at the upper end of the heating cylinder 11, and the temperature sensors 111 are all located near the first discharge funnel 12 on the partition plates 113. On one side of the hopper 12, four groups of first heating plate groups 112 are arranged inside the heating tube 11, one end of the heating tube 11 is fixedly connected to the first sealing plate, and the outer surface of the sealing plate is fixedly connected to the first mounting seat 13, the middle of the first mounting seat 13 is fixedly connected to the first motor 14, the output end of the first motor 14 is fixedly connected to the rotating shaft 15, and the rotating shaft 15 passes through the first sealing plate and is rotatably connected to the middle of the heating tube 11, and the rotating shaft 15 is rotatably connected to the middle of the four groups of dividing plates 113, four groups of spiral blades 16 are fixedly connected to the surface of the rotating shaft 15, and one end of the spiral blade 16 is rotatably connected to the middle of the first discharge funnel 12.

[0020] The first support seat 17 is fixedly connected to both ends of the outer surface of the heating cylinder 11, and the second support seat 39 is fixedly connected to both ends of the outer surface of the feeding cylinder 31. The feeding module 3 includes the feeding cylinder 31 and the second discharge funnel 32. The first discharge funnel 12 is fixedly connected to one side of one end of the feeding cylinder 31, and the first discharge funnel 12 and the feeding cylinder 31 are connected to each other. A plurality of second heating plate groups 35 are fixedly connected to the inner shell of the feeding cylinder 31. The end of the feeding cylinder 31 close to the first discharge funnel 12 is fixedly connected to the second sealing plate. The second sealing plate The outer surface is fixedly connected to a third mounting seat 36, the middle of the third mounting seat 36 is fixedly connected to a third motor 361, the output end of the third motor 361 is fixedly connected to a transmission shaft 37, and the transmission shaft 37 passes through the second sealing plate and is rotatably connected to the inside of the feeding barrel 31, the surface of the transmission shaft 37 is fixedly connected to a precision screw 38, and the precision screw 38 is rotatably connected to the inside of the feeding barrel 31, and the end of the feeding barrel 31 away from the first discharge funnel 12 is fixedly connected to the second discharge funnel 32, and the end of the second discharge funnel 32 away from the feeding barrel 31 is screwed. The thread is connected with a connecting pipe 33, and the end of the connecting pipe 33 away from the feeding cylinder 31 is fixedly connected with a feeding pipe 34, and the lower end of the feeding pipe 34 is fixedly connected with a solenoid valve 341. A group of second heating plate groups 35 are arranged inside the second discharge funnel 32. The feeding module 2 includes a feeding pipe 21 and a feeding funnel 22. The feeding pipe 21 is fixedly connected to the upper part of the end of the heating cylinder 11 away from the first discharge funnel 12. The feeding pipe 21 is connected to the middle part of the heating cylinder 11. The upper end of the feeding pipe 21 is fixedly connected with the feeding funnel 22, and the cross-section of the feeding funnel 22 is It is funnel-shaped, and the end of the feeding funnel 22 with a smaller diameter is connected to the upper end of the feeding pipe 21, a second mounting seat 23 is fixedly connected to the inner surface of the feeding funnel 22, a second motor 24 is fixedly connected to the middle of the second mounting seat 23, a stirring shaft 25 is fixedly connected to the output end of the second motor 24, and three groups of stirring arms 26 are fixedly connected to the surface of the stirring shaft 25, a group of stirring arms 26 close to the second motor 24 is rotatably connected to the inside of the lower end of the feeding funnel 22, and two groups of stirring arms 26 away from the second motor 24 are rotatably connected to the middle of the feeding pipe 21.

[0021] Working principle: When in use, the raw material is poured into the middle of the feed funnel 22, and the stirring shaft 25 is driven to rotate by the second motor 24. The stirring shaft 25 drives the three groups of stirring arms 26 to rotate, so that the raw material is accelerated from the feed funnel 22 into the feed pipe 21, and then enters the heating cylinder 11 from the feed pipe 21. The rotating shaft 15 is driven to rotate by the first motor 14, and the spiral blade 16 is driven to rotate by the rotating shaft 15. Under the push of the spiral blade 16, the raw material first passes through the first group of dividing plates 113 and enters the first heating area. The raw material is heated by the first group of first heating plates 112 to make the raw material preliminarily melted, and then the spiral blade 16 pushes the raw material into the subsequent heating area. , each heating zone is separated by a partition plate 113, each zone is equipped with a temperature sensor 111 and a first heating plate group 112, and the temperature data of each zone is collected in real time, and the heating power of each zone is finely regulated. The closer to the first discharge funnel 12, the smaller the diameter of the through hole on the partition plate 113, and the farther away from the first discharge funnel 12, the higher the temperature in the heating zone, thereby accelerating the melting of the raw material. The closer to the first discharge funnel 12, the smaller the temperature difference in the heating zone, ensuring the stability of the raw material transition state, so that the raw material is continuously melted in the process of moving, and the fluidity becomes higher, so that it can pass through the first heating plate group 112 with a smaller diameter. , ensuring that the material can be bathed in a uniform and appropriate heat environment throughout the melting process, completely eliminating defects such as local overheating or poor melting, and laying a solid foundation for high-quality printing. After the raw materials enter the heating area in turn, the melting state deepens. After the raw materials pass through the dividing plate 113 and enter the heating area closest to the first discharge funnel 12, the first heating plate group 112 performs the final heating on the raw materials, so that the raw materials enter the inside of the feed barrel 31 from the first discharge funnel 12. The third motor 361 drives the precision screw 38 to rotate through the transmission shaft 37, so that the raw materials are transported to the inside of the second discharge funnel 32, and then transported to the nozzle through the feeding pipe 34. The electromagnetic valve 341 can control The raw material enters the feeding tube 34. When the raw material moves inside the feeding barrel 31, the second heating plate group 35 heats the raw material to keep it in a molten state. The spiral blade 16 has a larger pitch design and has a strong conveying capacity. It can quickly push the raw material into the feeding barrel 31 to ensure the timeliness of material supply and avoid printing stagnation due to slow material delivery. The precision screw 38 has a relatively small pitch and focuses on the precise control of material flow. The spiral blade 16 and the precision screw 38 have a clear division of labor and work closely together to ensure that the material supply is stable and uninterrupted like a gurgling stream, and to ensure that the feeding speed is perfectly matched with the nozzle extrusion speed to achieve uniform and stable wire extrusion.

[0022] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fused deposition modeling device for 3D printing, comprising a melting module (1), a feeding module (2) and a conveying module (3), characterized in that: The melting module (1) comprises a heating cylinder (11) and a first discharge funnel (12), one end of the heating cylinder (11) being fixedly connected to the first discharge funnel (12), four groups of partition plates (113) being fixedly connected inside the heating cylinder (11), and the surfaces of the partition plates (113) are all provided with a plurality of through holes, and the diameters of the through holes on the four groups of partition plates (113) are successively reduced, four groups of temperature sensors (111) are provided at the upper end of the interior of the heating cylinder (11), and the temperature sensors (111) are all located on a side of the partition plate (113) close to the first discharge funnel (12), and the interior of the heating cylinder (11) is provided with four groups of first A heating plate group (112), wherein one end of the heating cylinder (11) is fixedly connected to a first sealing plate, and the outer surface of the sealing plate is fixedly connected to a first mounting seat (13), a first motor (14) is fixedly connected to the middle of the first mounting seat (13), a rotating shaft (15) is fixedly connected to the output end of the first motor (14), and the rotating shaft (15) passes through the first sealing plate and is rotatably connected to the middle of the heating cylinder (11), and the rotating shaft (15) is rotatably connected to the middle of the four groups of dividing plates (113), and four groups of spiral blades (16) are fixedly connected to the surface of the rotating shaft (15), and one end of the spiral blades (16) is rotatably connected to the middle of the first discharge hopper (12).

2. A fused deposition modeling device for 3D printing according to claim 1, characterized in that: The feed module (2) comprises a feed pipe (21) and a feed hopper (22); the feed pipe (21) is fixedly connected to the upper portion of an end of the heating cylinder (11) away from the first discharge hopper (12); the feed pipe (21) is connected to the middle portion of the heating cylinder (11).

3. A fused deposition modeling device for 3D printing according to claim 2, characterized in that: The upper end of the feed pipe (21) is fixedly connected to a feed hopper (22), and the cross-section of the feed hopper (22) is funnel-shaped, and the end of the feed hopper (22) with a smaller diameter is connected to the upper end of the feed pipe (21), the inner surface of the feed hopper (22) is fixedly connected to a second mounting seat (23), the middle part of the second mounting seat (23) is fixedly connected to a second motor (24), and the output end of the second motor (24) is fixedly connected to a stirring shaft (25).

4. A fused deposition modeling device for 3D printing according to claim 3, characterized in that: Three groups of stirring arms (26) are fixedly connected to the surface of the stirring shaft (25), one group of stirring arms (26) close to the second motor (24) is rotatably connected to the inside of the lower end of the feeding funnel (22), and two groups of stirring arms (26) away from the second motor (24) are rotatably connected to the middle of the feeding pipe (21).

5. The fused deposition modeling device for 3D printing according to claim 1, characterized in that: The feeding module (3) comprises a feeding cylinder (31) and a second discharge funnel (32); one side of one end of the feeding cylinder (31) is fixedly connected to the first discharge funnel (12), and the first discharge funnel (12) and the feeding cylinder (31) are internally connected; and a plurality of second heating plate groups (35) are fixedly connected to the internal shell of the feeding cylinder (31).

6. A fused deposition modeling device for 3D printing according to claim 5, characterized in that: A second sealing plate is fixedly connected to one end of the feed barrel (31) near the first discharge funnel (12); a third mounting seat (36) is fixedly connected to the outer surface of the second sealing plate; a third motor (361) is fixedly connected to the middle of the third mounting seat (36); a transmission shaft (37) is fixedly connected to the output end of the third motor (361); the transmission shaft (37) passes through the second sealing plate and is rotatably connected to the inside of the feed barrel (31); a precision screw (38) is fixedly connected to the surface of the transmission shaft (37); and the precision screw (38) is rotatably connected to the inside of the feed barrel (31).

7. A fused deposition modeling device for 3D printing according to claim 6, characterized in that: One end of the feeding cylinder (31) away from the first feeding funnel (12) is fixedly connected to the second feeding funnel (32), one end of the second feeding funnel (32) away from the feeding cylinder (31) is threadedly connected to a connecting pipe (33), one end of the connecting pipe (33) away from the feeding cylinder (31) is fixedly connected to a feeding pipe (34), a lower end of the feeding pipe (34) is fixedly connected to a solenoid valve (341), and a group of second heating plates (35) are arranged inside the second feeding funnel (32).

8. The fused deposition modeling device for 3D printing according to claim 5, characterized in that: Both ends of the outer surface of the heating cylinder (11) are fixedly connected to a first support seat (17), and both ends of the outer surface of the feeding cylinder (31) are fixedly connected to a second support seat (39).

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