Feeding device for 3D printer

Abstract

The utility model discloses a feeding device for a 3D printer, and relates to the technical field of printers, the feeding device comprises a feeding mechanism, the top of the feeding mechanism is provided with a second limiting mechanism, and the bottom of the feeding mechanism is provided with a first limiting mechanism; the feeding mechanism comprises a material guiding frame, a material guiding head is arranged at the bottom of the material guiding frame, and a penetrating type material guiding hole is formed in the vertical center position of the material guiding frame and the vertical center position of the material guiding head. According to the feeding mechanism, through the design of through type material guide holes of a material guide frame and a material guide head in the feeding mechanism, plastic wires are kept smooth in the feeding process, blockage and blockage in the feeding process are reduced, and the continuity and stability of 3D printing are improved; recycling of the plastic wires can be effectively limited when feeding is stopped, it is guaranteed that the front-end melted parts of the plastic wires can be sent out through the nozzle in time, and the problem that the nozzle is blocked due to recycling of the plastic wires is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of printers, and particularly relates to a feeding device for a 3D printer. Background Art

[0002] The feeding device for a 3D printer is a device used to control and regulate the supply of consumables for a 3D printer. It can ensure that during the 3D printing process, the consumables (such as materials like plastics, metals, ceramics, etc.) are conveyed to the print head at a stable speed and precision. The main function of the feeding device is to achieve continuous and uniform supply of the consumables to ensure the printing quality and efficiency.

[0003] The feeding device of a 3D printer, usually according to different printing technologies and material types, can be divided into the following parts: Hopper or silo: used to store printing materials, such as plastic filaments, powders or liquid resins. Feeding system: the part that conveys the materials from the hopper or silo to the print head or nozzle, which can be a screw conveyor, gears or belts, etc. Heating system: for a 3D printer using thermoplastic filaments, the heating system is used to heat the materials to a suitable temperature for printing.

[0004] During the processing of existing 3D printers, the plastic filaments conveyed by the feeding device are in a straightened state. When the processing stops, the plastic filaments stop being conveyed, and thus the plastic filaments cannot maintain a straightened state, resulting in a certain degree of recycling of the plastic filaments. Since the part of the front end of the plastic filament located inside the heating system is in a molten state, if the plastic filament suddenly recycles, it will cause the molten part at the front end of the plastic filament to not be able to pass through the nozzle in time. If the plastic filament recycles for another length, it will also cause blockage at the feeding end of the heating system, affecting the subsequent use of the feeding device of the 3D printer.

[0005] Therefore, it is very necessary to invent a feeding device for a 3D printer to solve the above problems. Content of the Utility Model

[0006] The purpose of the utility model is to provide a feeding device for a 3D printer to solve the above deficiencies in the technology.

[0007] To achieve the above purpose, the utility model provides the following technical solution: A feeding device for a 3D printer, including a feeding mechanism, a second limiting mechanism is arranged at the top of the feeding mechanism, and a first limiting mechanism is arranged at the bottom of the feeding mechanism;

[0008] The feeding mechanism includes a material guiding frame, a material guiding head is arranged at the bottom of the material guiding frame, a through-type material guiding hole is opened at the vertical center position of the material guiding frame and the material guiding head, the second limiting mechanism is arranged at the top of the material guiding frame and on one side of the material guiding hole, and the first limiting mechanism is arranged at the lower end of the material guiding frame and close to the front side;

[0009] On both sides of the bottom of the material guiding frame, near the back surface, and at the corresponding positions of the first limiting mechanism, support plates are fixedly installed.

[0010] As a preferred solution of the present utility model, a threaded hole is provided at the central position of the bottom of the material guiding frame, a connecting portion is fixedly installed at the top end of the material guiding head, the connecting portion is threadedly connected with the threaded hole, and the aperture of the threaded hole is larger than the aperture of the material guiding hole.

[0011] As a preferred solution of the present utility model, the second limiting mechanism includes a support seat, a limiting block is provided on the front surface of the support seat, both upper sides of the limiting block are rotatably connected to the inner walls of both upper sides of the support seat, several uniformly distributed second springs are provided on the back surface of the limiting block, and both ends of the several second springs are fixedly connected to the back surface of the limiting block and the front surface of the support seat respectively.

[0012] As a preferred solution of the present utility model, the limiting block is arranged in an inclined shape, the front end of the limiting block is located at the central position of the material guiding hole at the top of the material guiding frame, and an arc-shaped notch is provided on the upper surface of the limiting block and at the central position of the front end.

[0013] As a preferred solution of the present utility model, the first limiting mechanism includes a cross bar, the cross bar is arranged below the bottom of the material guiding frame and far away from the material guiding head, brackets are fixedly installed at both ends of the cross bar, and the upper ends of the two brackets are respectively rotatably connected to the outer walls of both lower sides of the material guiding frame.

[0014] As a preferred solution of the present utility model, a through hole is vertically provided at the middle position of the cross bar, first springs are fixedly installed horizontally at both ends of the cross bar, and one ends of the two first springs are fixedly connected to the two support plates at the corresponding positions.

[0015] In the above technical solution, the technical effects and advantages provided by the present utility model are as follows:

[0016] Through the through-type material guiding hole design of the material guiding frame and the material guiding head in the feeding mechanism, the plastic filaments are kept smooth during the feeding process, reducing the jamming and blockage during the feeding process, improving the continuity and stability of 3D printing. And in the feeding mechanism, the second limiting mechanism and the first limiting mechanism can effectively limit the recovery of the plastic filaments when the feeding stops, ensuring that the melted part at the front end of the plastic filaments can be sent out through the nozzle in time, and avoiding the nozzle blockage problem caused by the recovery of the plastic filaments. Description of the Drawings

[0017] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a three-dimensional view of the overall structure of the present utility model;

[0019] Figure 2 It is a first perspective cross-sectional view of the overall structure of the present utility model;

[0020] Figure 3 It is a second perspective cross-sectional view of the overall structure of the present utility model;

[0021] Figure 4 It is a first perspective exploded view of the overall structure of the present utility model;

[0022] Figure 5 It is a second perspective exploded view of the overall structure of the present utility model.

[0023] Explanation of reference numerals:

[0024] 1. Feeding mechanism; 2. Material guiding frame; 21. Threaded hole; 3. Material guiding head; 31. Connecting part; 4. Support plate; 5. First limiting mechanism; 51. Bracket; 52. Cross bar; 53. Through hole; 54. First spring; 6. Second limiting mechanism; 61. Support seat; 62. Limiting block; 63. Second spring; 7. Material guiding hole. Detailed implementation manners

[0025] To enable those skilled in the art to better understand the technical solutions of the present utility model, the following will further introduce the present utility model in detail with reference to the drawings.

[0026] The present utility model provides a feeding device for a 3D printer as shown in Figures 1-5 which includes a feeding mechanism 1. The feeding mechanism 1 is responsible for conveying the plastic filament from the material cylinder to the nozzle to ensure the continuous supply of the plastic filament during the printing process. A second limiting mechanism 6 is arranged at the top of the feeding mechanism 1, and a first limiting mechanism 5 is arranged at the bottom of the feeding mechanism 1. The second limiting mechanism 6 and the first limiting mechanism 5 are respectively located at the top and bottom of the material guiding frame 2 to limit the recovery of the plastic filament when the feeding stops and avoid nozzle blockage;

[0027] The feeding mechanism 1 includes a material guiding frame 2. At the bottom of the material guiding frame 2, there is a material guiding head 3. The material guiding frame 2 and the material guiding head 3 together form a material guiding system, which keeps the plastic filament straight during the feeding process, improving the printing quality. A through-type material guiding hole 7 is provided at the vertical center position of the material guiding frame 2 and the material guiding head 3. The material guiding hole 7 ensures the smooth flow of the plastic filament between the material guiding frame 2 and the material guiding head 3, reducing friction. The second limiting mechanism 6 is arranged at the top of the material guiding frame 2 and on one side of the material guiding hole 7. The first limiting mechanism 5 is arranged at the lower end of the material guiding frame 2 and near the front position;

[0028] On both sides of the bottom of the material guiding frame 2 and near the back position, and at the corresponding position of the first limiting mechanism 5, a support plate 4 is fixedly installed.

[0029] Further, in the above technical solution, a threaded hole 21 is provided at the center position of the bottom of the material guiding frame 2. The top end of the material guiding head 3 is fixedly installed with a connecting portion 31. The connecting portion 31 is threadedly connected with the threaded hole 21. The diameter of the threaded hole 21 is larger than the diameter of the material guiding hole 7. The connecting portion 31 and the threaded hole 21 facilitate the replacement and maintenance of the material guiding head 3, improving the service life of the equipment.

[0030] Further, in the above technical solution, the second limiting mechanism 6 includes a support seat 61. On the front surface of the support seat 61, there is a limiting block 62. The upper ends of both sides of the limiting block 62 are rotatably connected to the inner walls of the upper ends of both sides of the support seat 61. Thus, under the action of a plurality of second springs 63, the limiting block 62 can adjust the unfolding angle. On the back surface of the limiting block 62, there are a number of uniformly distributed second springs 63. The two ends of the plurality of second springs 63 are respectively fixedly connected to the back surface of the limiting block 62 and the front surface of the support seat 61.

[0031] Further, in the above technical solution, the limiting block 62 is arranged in an inclined shape. The front end of the limiting block 62 is located at the center position of the material guiding hole 7 at the top of the material guiding frame 2. On the upper surface of the limiting block 62 and at the center position of the front end, there is an arc-shaped notch. Through the inclined setting and the arc-shaped notch design of the limiting block 62, when feeding the plastic filament, the plastic filament can smoothly pass through the arc-shaped notch for feeding, reducing the risk of damage to the plastic filament. And for the inclined-designed limiting block 62, when the feeding stops, the front end of the limiting block 62 can quickly contact the plastic filament under the action of the second spring 63.

[0032] Further, in the above technical solution, the first limiting mechanism 5 includes a cross bar 52. The cross bar 52 is arranged below the bottom of the material guiding frame 2 and away from the material guiding head 3. Both ends of the cross bar 52 are fixedly installed with brackets 51. The upper ends of the two brackets 51 are respectively rotatably connected to the outer walls on both sides below the material guiding frame 2. Due to the rotation of the brackets 51, and the front end of the plastic filament is inserted into the through hole 53 of the cross bar 52, thus, the front end of the plastic filament can be bent by the rotation of the cross bar 52 following the brackets 51.

[0033] Further, in the above technical solution, a through hole 53 is vertically formed in the middle position of the cross bar 52. One end of a first spring 54 is horizontally and fixedly installed at each end of the cross bar 52. One end of the two first springs 54 is fixedly connected to the two support plates 4 at the corresponding positions. Through the first spring 54, automatic reset of the cross bar 52 can be realized, and further, the cross bar 52 can be controlled to drive the plastic wire to bend to a certain extent.

[0034] When the feeding device for a 3D printer provided by the present utility model is in use, its working process is as follows:

[0035] Ensure that all parts of the feeding device are correctly assembled, that is, the guiding frame 2, the guiding head 3, the first limiting mechanism 5, the second limiting mechanism 6 and other structures in the feeding mechanism 1 are assembled. Then, the front end of the plastic wire is inserted into the guiding hole 7 at the top of the guiding frame 2 and passes through the guiding hole 7 at the lower end of the guiding head 3. Then, the cross bar 52 is pulled to a certain angle towards the front of the guiding frame 2. Subsequently, the front end of the plastic wire is passed through the through hole 53 of the cross bar 52. Finally, the front end of the plastic wire is connected to the nozzle through the heating system. When the front end of the plastic wire is connected to the nozzle, the cross bar 52 remains in an inclined state under the pulling force of the plastic wire, and the first spring 54 is in an extended state.

[0036] When the processing is stopped, since the plastic wire will be recycled, and during the conveying process of the plastic wire, it is in a straightened state. When the plastic wire is not conveyed, the plastic wire is no longer straightened, so the plastic wire can no longer pull the cross bar 52. Then, under the action of the first spring 54, the cross bar 52 returns to its original position. The original position of the cross bar 52 is located at the back of the guiding head 3. After the cross bar 52 returns to its position, the plastic wire is bent to a certain extent again. The part of the plastic wire located in the second limiting mechanism 6 cannot be recycled under the resistance of the front end of the limiting block 62. Through the combination of the first limiting mechanism 5 and the second limiting mechanism 6, the purpose of controlling the recycling of the plastic wire is achieved.

[0037] Only some exemplary embodiments of the present utility model have been described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, without departing from the spirit and scope of the present utility model, the described embodiments can be modified in various different ways. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present utility model.

Claims

1. A feeding device for a 3D printer, comprising a feeding mechanism (1), characterized in that: A second limiting mechanism (6) is provided at the top of the feeding mechanism (1), and a first limiting mechanism (5) is provided at the bottom of the feeding mechanism (1); The feeding mechanism (1) comprises a material guide frame (2), a material guide head (3) is arranged at the bottom of the material guide frame (2), a through material guide hole (7) is opened at the vertical center position of the material guide frame (2) and the material guide head (3), the second limiting mechanism (6) is arranged at the top of the material guide frame (2) and is located on one side of the material guide hole (7), and the first limiting mechanism (5) is arranged at the lower end of the material guide frame (2) and is close to the front side; Support plates (4) are fixedly mounted on both sides of the bottom of the material guide frame (2), close to the back side, and at positions corresponding to the No. 1 limiting mechanism (5).

2. A feeding device for a 3D printer according to claim 1, characterized in that: A threaded hole (21) is provided at the center of the bottom of the material guide frame (2); a connecting portion (31) is fixedly mounted on the top of the material guide head (3); the connecting portion (31) is threadedly connected to the threaded hole (21); and the diameter of the threaded hole (21) is larger than the diameter of the material guide hole (7).

3. A feeding device for a 3D printer according to claim 1, characterized in that: The No. 2 limiting mechanism (6) comprises a support seat (61), a limiting block (62) is arranged on the front of the support seat (61), both sides of the upper end of the limiting block (62) are rotatably connected to the inner walls on both sides of the upper end of the support seat (61), and a plurality of evenly distributed No. 2 springs (63) are arranged on the back of the limiting block (62), and both ends of the plurality of No. 2 springs (63) are respectively fixedly connected to the back of the limiting block (62) and the front of the support seat (61).

4. A feeding device for a 3D printer according to claim 3, characterized in that: The limit block (62) is arranged in an inclined shape, the front end of the limit block (62) is located at the center of the material guide hole (7) at the top of the material guide frame (2), and an arc-shaped notch is provided on the upper surface of the limit block (62) at the center of the front end.

5. A feeding device for a 3D printer according to claim 1, characterized in that: The first limiting mechanism (5) comprises a cross bar (52), which is arranged below the bottom of the material guide frame (2) and away from the material guide head (3), and brackets (51) are fixedly mounted at both ends of the cross bar (52), and the upper ends of the two brackets (51) are rotatably connected to the lower outer walls of the material guide frame (2) respectively.

6. A feeding device for a 3D printer according to claim 5, characterized in that: A through hole (53) is vertically opened in the middle of the cross bar (52), and a No. 1 spring (54) is transversely fixedly installed at both ends of the cross bar (52), and one end of the two No. 1 springs (54) is fixedly connected to two support plates (4) at corresponding positions.

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