Extrusion device for 3D printing of vehicles

Abstract

This utility model relates to the field of automotive sculpture technology, and discloses an extrusion device for 3D printing of vehicles, including a barrel. A drive motor is fixedly installed on the top of the barrel, and a spiral feed rod is rotatably arranged inside the barrel. The output end of the drive motor is fixedly connected to the top end of the spiral feed rod. A feed pipe is connected to the side of the barrel, and an electric heating jacket is fitted on the outer wall of the barrel. An extrusion nozzle is connected to the bottom of the barrel. An airflow is generated by a micro fan. The airflow enters the cooling cylinder through a blower pipe, and is then slowed and divided by an annular flexible air plate to diffuse the airflow. It then undergoes secondary slowing and division by a bowl-shaped flexible air plate. The low-speed and wide-range airflow is blown from multiple points towards the high-temperature material extruded from the extrusion nozzle, which can both cool the material and avoid the problem of the material being blown apart by a high-speed airflow.

Description

Technical Field

[0001] This utility model relates to the field of sculpted automobile manufacturing technology, specifically an extrusion device for 3D printing of vehicles. Background Technology

[0002] 3D printing is a type of rapid prototyping technology. It's a technique that uses digital model files as a basis and employs powdered metals or plastics and other bondable materials to construct objects layer by layer. With the development of modern science and technology, 3D printing technology has been applied to many fields. 3D printing is typically achieved using 3D printers and is commonly used in mold making, industrial design, sculpture, and other fields to create models. It is also used for the direct manufacturing of some products, and parts printed using this technology already exist. This technology has applications in jewelry, footwear, industrial design, architecture, engineering and construction (AEC), automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, firearms, and other fields.

[0003] The extrusion equipment is the most important component in a 3D printer. Its performance directly affects the printing quality and efficiency of the product. However, the existing 3D printer extrusion equipment has limited functionality, generally only having the function of heating and melting. The temperature of the extruded molten slurry is too high, resulting in slow molding and deformation after stacking, which leads to low printing efficiency. This is especially true for the manufacture of products with complex shapes and structures, such as sculpted automobiles, where slow molding can easily cause deformation after stacking, affecting the printing quality. Utility Model Content

[0004] The purpose of this invention is to provide an extrusion device for 3D printing of vehicles to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an extrusion device for 3D printing of vehicles, comprising a barrel, a drive motor fixedly mounted on the top of the barrel, a spiral feed rod rotatably arranged inside the barrel, the output end of the drive motor being fixedly connected to the top end of the spiral feed rod, a feed pipe connected to the side of the barrel, an electric heating sleeve fitted on the outer wall of the barrel, an extrusion nozzle connected to the bottom of the barrel, an annular mounting plate fixedly fitted on the bottom of the barrel, and a nozzle mounting plate arranged below the annular mounting plate. The nozzle mounting base presses the extrusion nozzle against the bottom of the barrel. The nozzle mounting base is fixedly connected to the annular mounting plate by bolts. A micro fan is fixedly installed on the top of the annular mounting plate. The bottom of the extrusion nozzle is connected to a cooling cylinder. An annular soft air plate and a bowl-shaped soft air plate are fixedly installed inside the cooling cylinder. The annular soft air plate is located above the bowl-shaped soft air plate. The output end of the micro fan is connected to a blowing pipe. The bottom end of the blowing pipe is connected to the inside of the cooling cylinder, and the connection between the cooling cylinder and the blowing pipe is located above the annular soft air plate.

[0006] Furthermore, a sealing gasket is directly placed between the top of the extrusion nozzle and the bottom of the barrel, and a second heat insulation ring is fixedly fitted on the outer wall of the barrel, which separates the electric heating jacket from the micro fan.

[0007] Furthermore, the annular soft air plate is in the form of a continuously curved ring, with the highest point of the annular soft air plate near the connection between the cooling cylinder and the blower pipe.

[0008] Furthermore, a fixing pipe is fixedly installed on the outer wall of the cooling cylinder, and an installation head is fixedly installed at the top end of the fixing pipe. The installation head is fixedly connected to the nozzle mounting seat by bolts.

[0009] Furthermore, a heat insulation ring is fixedly installed at the top of the cooling cylinder, which separates the top of the cooling cylinder from the bottom of the extrusion nozzle.

[0010] Furthermore, a pipe fixing seat is fixed to the bottom of the nozzle mounting base by screws, and the pipe fixing seat is sleeved on the blower pipe.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. The airflow is generated by the operation of a micro fan. The airflow enters the cooling cylinder through the air duct and is then slowed and divided by the annular flexible air plate, which diffuses the airflow. Then, it is slowed and divided again by the bowl-shaped flexible air plate. The low-speed and wide-range airflow is blown from multiple points towards the high-temperature material extruded from the extrusion nozzle. This not only achieves the purpose of cooling the material, but also avoids the problem of the material being blown apart by the high-speed airflow directly blowing on the material. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This utility model Figure 1 A structural schematic diagram from a bottom-view perspective;

[0015] Figure 3 This utility model Figure 1 A structural schematic diagram of the front sectional view;

[0016] Figure 4 This is a schematic diagram of the structure of the annular soft air plate and the bowl-shaped soft air plate of this utility model.

[0017] In the diagram: 1. Barrel; 2. Extrusion nozzle; 3. Annular mounting plate; 4. Nozzle mounting base; 5. Sealing gasket; 6. Cooling cylinder; 7. Miniature fan; 8. Air duct; 9. Pipe fixing seat; 10. Fixing pipe; 11. Mounting head; 12. Heat insulation ring one; 13. Heat insulation ring two; 14. Electric heating jacket; 15. Feed pipe; 16. Drive motor; 17. Spiral conveyor bar; 18. Annular soft air plate; 19. Bowl-shaped soft air plate. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Please see Figures 1-4This utility model provides a technical solution: an extrusion device for vehicle 3D printing, including a barrel 1, a drive motor 16 fixedly installed on the top of the barrel 1, a spiral feed rod 17 rotatably arranged inside the barrel 1, the output end of the drive motor 16 fixedly connected to the top end of the spiral feed rod 17, a feed pipe 15 connected to the side of the barrel 1, an electric heating sleeve 14 sleeved on the outer wall of the barrel 1, an extrusion nozzle 2 connected to the bottom end of the barrel 1, an annular mounting plate 3 fixedly sleeved at the bottom end of the barrel 1, a nozzle mounting seat 4 arranged below the annular mounting plate 3, the nozzle mounting seat 4 pressing the extrusion nozzle 2 against the bottom end of the barrel 1, the nozzle mounting seat 4 being fixedly connected to the annular mounting plate 3 by bolts, a micro fan 7 fixedly installed on the top of the annular mounting plate 3, a cooling cylinder 6 connected to the bottom end of the extrusion nozzle 2, an annular soft air plate 18 and a bowl-shaped soft air plate 19 fixedly installed inside the cooling cylinder 6, the annular soft air plate 18 being located above the bowl-shaped soft air plate 19, and the micro fan 7... The output end is connected to the air blowing pipe 8, and the bottom end of the air blowing pipe 8 is connected to the inside of the cooling cylinder 6. The connection between the cooling cylinder 6 and the air blowing pipe 8 is located above the annular flexible air plate 18. The drive motor 16 drives the spiral conveyor rod 17 to rotate, which squeezes and conveys the material entering the cylinder 1 from the feed pipe 15 downward. The cylinder 1 is heated by the electric heating jacket 14, which in turn heats the material in the cylinder 1, causing the material to melt. The molten material is squeezed into the extrusion nozzle 2 by the spiral conveyor rod 17 and then extruded from the extrusion nozzle 2. At this time, the micro fan 7 works to generate airflow. The airflow enters the cooling cylinder 6 through the air blowing pipe 8 and is then slowed and divided by the annular flexible air plate 18, which diffuses the airflow. Then, it is slowed and divided again by the bowl-shaped flexible air plate 19. The low-speed and wide-range airflow is blown from multiple points to the high-temperature material extruded from the extrusion nozzle 2, which can not only achieve the purpose of cooling the material, but also avoid the problem of the material being blown apart by the high-speed airflow directly blowing onto the material.

[0020] A sealing gasket 5 is directly placed between the top of the extrusion nozzle 2 and the bottom of the barrel 1. A heat insulation ring 13 is fixedly fitted on the outer wall of the barrel 1. The heat insulation ring 13 separates the electric heating jacket 14 from the micro fan 7. The sealing gasket 5 ensures the sealing at the connection between the extrusion nozzle 2 and the barrel 1 to prevent leakage of molten material. The heat insulation ring 13 prevents the electric heating jacket 14 from heating the micro fan 7, which would cause the micro fan 7 to overheat.

[0021] The annular flexible air plate 18 is a continuously curved ring. The highest point of the annular flexible air plate 18 is close to the connection between the cooling cylinder 6 and the blowing pipe 8. This design can better disperse the airflow entering the cooling cylinder 6, so that the airflow can blow towards the extruded material from multiple directions as much as possible.

[0022] A fixing pipe 10 is fixedly installed on the outer wall of the cooling cylinder 6. An installation head 11 is fixedly installed on the top end of the fixing pipe 10. The installation head 11 is fixedly connected to the nozzle mounting seat 4 by bolts. The installation head 11 and the nozzle mounting seat 4 are fixedly connected by screws, so that the installation head 11 is detachable, and thus the cooling cylinder 6 is detachable, so that when the extrusion nozzle 2 needs to be replaced or cleaned, the cooling cylinder 6 will not hinder the above operations.

[0023] A heat insulation ring 12 is fixedly installed at the top of the cooling cylinder 6. The heat insulation ring 12 separates the top of the cooling cylinder 6 from the bottom of the extrusion nozzle 2. The heat insulation ring 12 prevents the extrusion nozzle 2 from being heated by the material and then the heat is transferred to the cooling cylinder 6, which would cause the airflow entering the cooling cylinder 6 to be heated. This avoids the problem that the airflow cannot effectively cool the molten material after it is heated.

[0024] The bottom of the nozzle mounting base 4 is fixed with a pipe fixing seat 9 by screws. The pipe fixing seat 9 is sleeved on the air blowing pipe 8. The pipe fixing seat 9 is used to reinforce the air blowing pipe 8 and prevent the air blowing pipe 8 from shaking or loosening when the airflow flows through it.

[0025] Working principle: During use, before the material enters the barrel 1 from the feed pipe 15, the electric heating jacket 14, drive motor 16, and micro fan 7 are turned on. The electric heating jacket 14 heats the barrel 1, the drive motor 16 drives the spiral conveyor rod 17 to rotate, and the micro fan 7 generates airflow. After the material enters the barrel 1 from the feed pipe 15, the material is heated and melted by the heated barrel 1, and then conveyed by the spiral conveyor rod 17 to the extrusion nozzle 2 and extruded from the opening of the extrusion nozzle 2. When the material passes through the center of the cooling cylinder 6, the airflow generated by the micro fan 7 enters the cooling cylinder 6 from the air blowing pipe 8. The airflow passes through the annular soft air plate 18 and the bowl-shaped soft air plate 19 in sequence, and is subjected to two slow flow and diversion. Then it is blown towards the molten material from multiple directions, cooling the material while avoiding the high-speed airflow from blowing the material away.

[0026] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

Claims

1. An extrusion apparatus for 3D printing of vehicles, comprising a barrel (1), a drive motor (16) fixedly mounted on the top of the barrel (1), a spiral feed rod (17) rotatably disposed inside the barrel (1), the output end of the drive motor (16) being fixedly connected to the top end of the spiral feed rod (17), a feed pipe (15) communicating with the side of the barrel (1), an electric heating sleeve (14) sleeved on the outer wall of the barrel (1), and an extrusion nozzle (2) communicating with the bottom end of the barrel (1), characterized in that: The bottom end of the barrel (1) is fixedly fitted with an annular mounting plate (3). A nozzle mounting seat (4) is provided below the annular mounting plate (3). The nozzle mounting seat (4) presses the extrusion nozzle (2) against the bottom end of the barrel (1). The nozzle mounting seat (4) is fixedly connected to the annular mounting plate (3) by bolts. A micro fan (7) is fixedly installed on the top of the annular mounting plate (3). The bottom end of the extrusion nozzle (2) is connected to a cooling cylinder (6). An annular soft air plate (18) and a bowl-shaped soft air plate (19) are fixedly installed inside the cooling cylinder (6). The annular soft air plate (18) is located above the bowl-shaped soft air plate (19). The output end of the micro fan (7) is connected to a blowing pipe (8). The bottom end of the blowing pipe (8) is connected to the inside of the cooling cylinder (6), and the connection between the cooling cylinder (6) and the blowing pipe (8) is located above the annular soft air plate (18).

2. The extrusion equipment for vehicle 3D printing according to claim 1, characterized in that: The top of the extrusion nozzle (2) is directly padded with a sealing gasket (5) and the bottom of the barrel (1). The outer wall of the barrel (1) is fixedly fitted with a heat insulation ring (13), which separates the electric heating jacket (14) from the micro fan (7).

3. The extrusion equipment for vehicle 3D printing according to claim 1, characterized in that: The annular soft air plate (18) is a continuously curved ring, and the highest point of the annular soft air plate (18) is close to the connection between the cooling cylinder (6) and the blowing pipe (8).

4. An extrusion apparatus for vehicle 3D printing according to claim 1, characterized in that: A fixing pipe (10) is fixedly installed on the outer wall of the cooling cylinder (6), and an installation head (11) is fixedly installed at the top of the fixing pipe (10). The installation head (11) is fixedly connected to the nozzle mounting seat (4) by bolts.

5. An extrusion apparatus for vehicle 3D printing according to claim 1, characterized in that: A heat insulation ring (12) is fixedly installed at the top of the cooling cylinder (6), which separates the top of the cooling cylinder (6) from the bottom of the extrusion nozzle (2).

6. An extrusion apparatus for vehicle 3D printing according to claim 1, characterized in that: The bottom of the nozzle mounting base (4) is fixed with a pipe fixing seat (9) by screws, and the pipe fixing seat (9) is sleeved on the blow pipe (8).

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