Printing material extrusion device of 3D printer

Abstract

The utility model provides a printing material extrusion device of a 3D printer, which belongs to the technical field of printers and comprises an extrusion container and a main shaft arranged on the extrusion container, and the inner wall of the upper end of the extrusion container is fixedly connected with a feeding pipe. The crushing block on the outer side of the circular truncated cone is matched with the rolling block on the inner wall to crush a printing material, meanwhile, the main shaft and the gear are matched with the outer gear ring to drive the rolling block and the crushing block to rotate in the opposite directions, and compared with rotation on the same side, the two sides of the printing material can be subjected to acting force in the opposite directions; the two sides of the material are pulled, the printing material can be quickly crushed and separated, the crushed printing material is smaller in particle compared with an initial material and can be conveyed more conveniently, and then when the small-particle material is heated, the internal material is heated more quickly, so that the whole material can be melted more quickly; and therefore, the extrusion conveying efficiency is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of printers, and more specifically, to an extrusion device for printing materials of a 3D printer. Background Art

[0002] The 3D printing technology emerged in the 1990s and has developed rapidly in recent years. A 3D printer is a device that uses technologies such as curing and lamination to achieve rapid prototyping. When working, the 3D printer needs to read the cross-sectional information in the required printing file, and then print out these cross-sections layer by layer with raw materials, and then bond the cross-sections of each layer in various ways to manufacture a three-dimensional entity, thus achieving the purpose of quickly and simply manufacturing various shaped items through 3D printing technology.

[0003] In the prior art, the printing material extrusion device is an important component device in a 3D printer, which relies on hot melting and extrusion to extrude the printing materials. However, when dealing with materials in a relatively large granular form, the melting rate of the common extrusion device is slow, and it is easy to cause internal blockage and it is difficult to effectively extrude the materials, resulting in poor extrusion efficiency. How to invent an extrusion device for printing materials of a 3D printer to improve these problems has become an urgent problem to be solved by those skilled in the art. Summary of the Utility Model

[0004] To make up for the above deficiencies, the utility model provides an extrusion device for printing materials of a 3D printer, aiming to improve the problem of poor extrusion efficiency when the common extrusion device deals with materials in a relatively large granular form.

[0005] The utility model is implemented as follows:

[0006] The utility model provides an extrusion device for printing materials of a 3D printer, including an extrusion barrel and a main shaft arranged on the extrusion barrel. The inner wall of the upper end of the extrusion barrel is fixedly connected with a feeding pipe, the outer wall of the upper end of the extrusion barrel is fixedly connected with a mounting frame, a motor is installed on one side of the mounting frame, a heating sleeve is installed inside the extrusion barrel, and an annular groove is formed on the inner wall of the extrusion barrel above the heating sleeve.

[0007] The outer wall of the main shaft is rotationally connected with the inner wall of the extrusion barrel. A driving pulley groove is fixedly connected to the outer wall of one side of the main shaft. A frustum is fixedly connected to one end of the main shaft, and a spiral extrusion rod is fixedly connected to the lower end of the frustum.

[0008] Preferably, the lower end of the extrusion barrel is fixedly connected with an extrusion pipe. The output end of the motor is fixedly connected with the upper end of the main shaft. The outer wall of the main shaft is rotationally connected with the inner wall of the mounting frame.

[0009] By adopting the above technical solution, the material for 3D printing enters the extrusion cylinder through the feeding pipe, and falls through the frustum into the outside of the spiral extrusion rod below. Then, the motor and the heating jacket are started to heat and melt the material, and then it is transported downward and discharged through the extrusion pipe at the lower end of the extrusion cylinder.

[0010] Preferably, a driving groove is formed on one side of the annular groove, and two symmetric fixing blocks are fixedly connected to one end of the extrusion cylinder. A gear rotatably connected to the inner wall of the driving groove is installed between the two fixing blocks.

[0011] The upper end of the gear is fixedly connected with a transmission pulley groove, and a transmission belt in transmission connection with the driving pulley groove is installed on the transmission pulley groove.

[0012] Preferably, an external gear ring meshing with the gear is rotatably connected to the inner wall of the annular groove, and a plurality of rolling blocks are fixedly connected to the inner wall of the external gear ring.

[0013] Preferably, a plurality of crushing blocks are fixedly connected to the outer wall of the lower end of the frustum, and the crushing blocks cooperate with the rolling blocks to crush the material.

[0014] By adopting the above technical solution, during the process of starting the motor to extrude and transport the material by the spiral extrusion rod, under the action of the transmission belt, the gear at one end rotates simultaneously. The gear meshes with the external gear ring to drive the inner rolling blocks to rotate. At the same time, the crushing blocks on the outer wall of the frustum rotate in the opposite direction and cooperate with the rolling blocks to crush the material into smaller particles, improving the subsequent melting efficiency.

[0015] The beneficial effects of the present utility model are:

[0016] The crushing blocks on the outside of the frustum rotate, cooperating with the rolling blocks on the inner wall to realize the crushing of the printing material. At the same time, through the cooperation of the main shaft and the gear with the external gear ring, the rolling blocks and the crushing blocks are driven to rotate in opposite directions. Compared with the rotation on the same side, the two sides of the printing material can be subjected to opposite-direction forces, thereby realizing the pulling of the two sides of the material, which helps to quickly break and separate the printing material. The crushed printing material has smaller particles than the initial material, which can be more conveniently transported. Secondly, when the small-particle material is heated, the internal material is heated faster, enabling the material as a whole to melt more rapidly, effectively solving the situation where some materials are not completely melted and accumulate at the discharge port of the extrusion cylinder, thereby further improving the extrusion and transportation efficiency. Description of the Drawings

[0017] To more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0018] Figure 1 is a schematic structural diagram of a printing material extrusion device of a 3D printer provided by an embodiment of the present utility model;

[0019] Figure 2 is a partial structural sectional view of a printing material extrusion device of a 3D printer provided by an embodiment of the present utility model;

[0020] Figure 3 is a half-sectional view of the overall structure of a printing material extrusion device of a 3D printer provided by an embodiment of the present utility model;

[0021] Figure 4 is a top half-sectional view of the overall structure of a printing material extrusion device of a 3D printer provided by an embodiment of the present utility model.

[0022] In the figure: 1, extrusion cylinder; 2, feeding pipe; 3, mounting frame; 4, motor; 5, fixing block; 6, heating sleeve; 7, annular groove; 8, driving groove; 9, main shaft; 10, driving pulley groove; 11, frustum; 12, crushing block; 13, spiral extrusion rod; 14, gear; 15, transmission pulley groove; 16, transmission belt; 17, external tooth ring; 18, rolling block. Specific embodiments

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0024] Example, refer to Figures 1-4 , a printing material extrusion device of a 3D printer, including an extrusion cylinder 1 and a main shaft 9 arranged on the extrusion cylinder 1. The inner wall of the upper end of the extrusion cylinder 1 is fixedly connected with a feeding pipe 2, the outer wall of the upper end of the extrusion cylinder 1 is fixedly connected with a mounting frame 3, a motor 4 is installed on one side of the mounting frame 3, a heating sleeve 6 is installed inside the extrusion cylinder 1, and an annular groove 7 is opened on the inner wall of the extrusion cylinder 1 above the heating sleeve 6;

[0025] The outer wall of the main shaft 9 is rotatably connected to the inner wall of the extrusion cylinder 1. A driving pulley groove 10 is fixedly connected to the outer wall on one side of the main shaft 9. A frustum 11 is fixedly connected to one end of the main shaft 9. A spiral extrusion rod 13 is fixedly connected to the lower end of the frustum 11.

[0026] Furthermore, an extrusion pipe is fixedly connected to the lower end of the extrusion cylinder 1. The output end of the motor 4 is fixedly connected to the upper end of the main shaft 9. The outer wall of the main shaft 9 is rotatably connected to the inner wall of the mounting bracket 3.

[0027] It should be noted that the material for 3D printing enters the extrusion cylinder 1 through the feeding pipe 2, and falls into the outer side of the spiral extrusion rod 13 near the spiral blade below through the frustum 11. The heating sleeve 6 is started to heat and melt the material. At the same time, the motor 4 is started to drive the main shaft 9 to drive the spiral extrusion rod 13 at the lower end to rotate, so that the melted printing material is conveyed downward and discharged through the extrusion pipe at the lower end of the extrusion cylinder 1.

[0028] Furthermore, a driving groove 8 is provided on one side of the annular groove 7. Two symmetrical fixing blocks 5 are fixedly connected to one end of the extrusion cylinder 1. A gear 14 rotatably connected to the inner wall of the driving groove 8 is installed between the two fixing blocks 5. It is characterized in that a transmission pulley groove 15 is fixedly connected to the upper end of the gear 14. A transmission belt 16 drivingly connected to the driving pulley groove 10 is installed on the transmission pulley groove 15. It is characterized in that an external tooth ring 17 meshing with the gear 14 is rotatably connected to the inner wall of the annular groove 7. A plurality of rolling blocks 18 are fixedly connected to the inner wall of the external tooth ring 17. It is characterized in that a number of crushing blocks 12 are fixedly connected to the outer wall at the lower end of the frustum 11. The crushing blocks 12 cooperate with the rolling blocks 18 to crush the material.

[0029] It should be noted that during the process of the spiral extrusion rod 13 extruding and conveying the printing material, the printing material inside the upper end of the extrusion cylinder 1 accumulates between the rolling blocks 18 and the frustum 11 and slowly moves downward. The driving pulley groove 10 at one end of the main shaft 9 drives the transmission pulley groove 15 at the lower end to drive the gear 14 at the lower end to rotate simultaneously under the action of the transmission belt 16. When the gear 14 rotates, it meshes with the external tooth ring 17 on the outside to drive the rolling blocks 18 on the inside to rotate. At the same time, the crushing blocks 12 on the outer wall of the frustum 11 rotate in the opposite direction, so that the crushing blocks 12 and the rolling blocks 18 pull the two sides of the printing material in the middle in the opposite direction, which helps to quickly break and separate the printing material. The crushed printing material has smaller particles than the initial material, and can be conveyed more conveniently. Secondly, when the small-particle material is heated, the internal material is heated faster, so that the whole material can be melted more quickly, thereby further improving the efficiency of extrusion and conveying.

[0030] The working principle of the printing material extrusion device of this 3D printer:

[0031] The materials for 3D printing enter the extrusion cylinder 1 through the feeding pipe 2, and fall through the frustum 11 to the outside of the spiral extrusion rod 13 near the spiral blade below. The heating jacket 6 is started to heat and melt the materials. At the same time, the motor 4 is started to drive the main shaft 9 to drive the spiral extrusion rod 13 at the lower end to rotate. During the process of the spiral extrusion rod 13 extruding and conveying the printing materials, the printing materials inside the upper end of the extrusion cylinder 1 accumulate between the rolling block 18 and the frustum 11 and slowly move downward. The driving pulley groove 10 at one end of the main shaft 9 makes the driving pulley groove 15 at one end drive the gear 14 at the lower end to rotate simultaneously under the action of the transmission belt 16. When the gear 14 rotates, it meshes with the external gear ring 17 on the outside to drive the rolling block 18 inside to rotate. At the same time, the crushing block 12 on the outer wall of the frustum 11 rotates in the opposite direction and cooperates with the rolling block 18 to rotate and roll the printing materials therein, so as to realize the pulling of both sides of the materials, which helps to quickly break and separate the printing materials. The crushed printing materials have smaller particles than the initial materials and can be conveyed more conveniently. Secondly, when the small-particle materials are heated, the internal materials are heated faster, so that the materials as a whole can be melted more quickly, thereby further improving the efficiency of extrusion and conveying.

[0032] It should be noted that the specific model and specification of the motor need to be selected according to the actual specifications of the device, etc. The specific selection calculation method adopts the existing technology in the field, so it will not be elaborated in detail.

[0033] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A printing material extrusion device for a 3D printer, comprising an extrusion cylinder (1) and a main shaft (9) arranged on the extrusion cylinder (1), characterized in that: The upper inner wall of the extrusion barrel (1) is fixedly connected to a feeding pipe (2), the upper outer wall of the extrusion barrel (1) is fixedly connected to a mounting frame (3), a motor (4) is mounted on one side of the mounting frame (3), a heating sleeve (6) is mounted inside the extrusion barrel (1), and an annular groove (7) is provided on the upper inner wall of the extrusion barrel (1) near the heating sleeve (6); The outer wall of the main shaft (9) is rotatably connected to the inner wall of the extrusion cylinder (1); a driving wheel groove (10) is fixedly connected to the outer wall of one side of the main shaft (9); one end of the main shaft (9) is fixedly connected to a round table (11); and the lower end of the round table (11) is fixedly connected to a spiral extrusion rod (13).

2. The printing material extrusion device of a 3D printer according to claim 1, characterized in that: The lower end of the extrusion cylinder (1) is fixedly connected to an extrusion tube, the output end of the motor (4) is fixedly connected to the upper end of the main shaft (9), and the outer wall of the main shaft (9) is rotatably connected to the inner wall of the mounting frame (3).

3. The printing material extrusion device of a 3D printer according to claim 1, characterized in that: A driving groove (8) is provided on one side of the annular groove (7); two symmetrical fixing blocks (5) are fixedly connected to one end of the extrusion cylinder (1); and a gear (14) rotatably connected to the inner wall of the driving groove (8) is installed between the two fixing blocks (5).

4. The printing material extrusion device of a 3D printer according to claim 3, characterized in that: The upper end of the gear (14) is fixedly connected with a transmission wheel groove (15), and a transmission belt (16) which is transmission-connected to the driving wheel groove (10) is installed on the transmission wheel groove (15).

5. The printing material extrusion device of a 3D printer according to claim 4, characterized in that: The inner wall of the annular groove (7) is rotatably connected to an outer toothed ring (17) meshingly connected to the gear (14), and the inner wall of the outer toothed ring (17) is fixedly connected to a plurality of rolling blocks (18).

6. The printing material extrusion device of a 3D printer according to claim 5, characterized in that: A plurality of crushing blocks (12) are fixedly connected to the outer wall of the lower end of the truncated table (11), and the crushing blocks (12) cooperate with the crushing blocks (18) to crush the materials.

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