High-precision nozzle for 3D printing

Abstract

The utility model relates to the technical field of nozzles of 3D (three-dimensional) printers, and discloses a high-precision nozzle for 3D printing, which comprises a nozzle barrel, a mounting hole arranged on the nozzle barrel, a spray pipe mounted in the mounting hole, a threaded pipe embedded on the nozzle barrel, a cleaning block arranged in the nozzle barrel, a mounting plate and a bidirectional motor arranged above the nozzle barrel and mounted on the mounting plate, an output rotating shaft of a bidirectional motor drives a lead screw to rotate, a mounting plate can ascend and descend on a guide rod under the action of a threaded pipe, the lead screw drives a cleaning block to rotate and descend in a nozzle barrel, raw materials attached to the inner wall of the nozzle barrel can be scraped and cleaned, and the phenomenon that the raw materials are left in the nozzle barrel is avoided; and after the mounting plate descends, air is blown into the nozzle barrel through the air blowing assembly, and the cleaning efficiency of raw materials in the nozzle barrel is improved. And the cleaning effect on the nozzle barrel is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printer nozzles, in particular to a high-precision nozzle for 3D printing. Background Art

[0002] During the operation of 3D printing equipment, it is usually necessary to extrude various raw materials into shape through the nozzle. During this process, due to the internal pressure of the nozzle, when the extrusion stops, the nozzle will still have raw materials overflowing, causing wire drawing and accumulation of materials on the printed embryo, affecting the appearance of the printed sample. At the same time, raw materials will accumulate at the nozzle, affecting the thickness and speed of the output material.

[0003] A Chinese patent with patent number CN219405450U discloses a 3D printing extrusion nozzle, which can timely suck and separate the raw materials in the inner cavity of the nozzle by using a negative pressure tank suction method to avoid overflow from the discharge nozzle, causing raw material drawing or accumulation, and affecting the printing quality.

[0004] However, although the raw materials in the nozzle can be sucked away to a certain extent by suction alone, the raw materials attached to the inner wall of the nozzle are difficult to be sucked away, especially the raw materials on the inner bottom wall, which easily leads to the situation that the raw materials remain in the cavity, thereby affecting the discharge of the raw materials in the next printing. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a high-precision nozzle for 3D printing, which effectively solves the problem that the existing nozzle uses suction to remove residues, the raw materials attached to the inner wall of the nozzle are difficult to be sucked away, and the raw materials are easily left in the cavity, which in turn affects the discharge of the raw materials in the next 3D printing.

[0006] To achieve the above purpose, the technical solution adopted by the utility model is: a high-precision nozzle for 3D printing, comprising:

[0007] A nozzle barrel is provided with a mounting hole, a spray pipe is installed in the mounting hole, a threaded tube is inlaid on the nozzle barrel, and a cleaning block is arranged in the nozzle barrel.

[0008] The mounting plate is arranged above the nozzle barrel, a bidirectional motor is mounted on the mounting plate, a screw rod is mounted on the output shaft of the bidirectional motor, and the bottom end of the screw rod passes through the threaded tube and is fixedly connected to the cleaning block, and the screw rod is threadedly connected to the threaded tube.

[0009] The guide rod is slidably connected to the mounting plate, and the bottom end of the guide rod is fixedly connected to the nozzle barrel.

[0010] The blowing assembly is arranged on the nozzle barrel and is used for blowing and cleaning the inside of the nozzle barrel by moving the mounting plate downward.

[0011] Furthermore, a limit plate is fixedly connected to the guide rod, and the limit plate is located above the mounting plate.

[0012] Furthermore, the blowing assembly includes an air cylinder fixedly connected to the nozzle cylinder, the air cylinder is provided with a through hole, a linkage rod is arranged in the through hole, one end of the linkage rod is fixedly connected to the mounting plate, the other end of the linkage rod is fixedly connected to a piston, and a rubber bowl is installed on the piston.

[0013] Furthermore, the air cylinder is fixedly connected with an air pipe, one end of the air pipe away from the air cylinder is fixedly connected with the nozzle cylinder, and a one-way valve is installed on the air pipe.

[0014] Furthermore, it also includes a heating block, which is provided with a connecting hole, in which a throat and a connecting pipe are installed, and a connecting seat is fixedly connected to the nozzle barrel, and one end of the connecting seat away from the nozzle barrel is installed on the connecting pipe.

[0015] The beneficial effects of the above technical solution are:

[0016] The utility model is provided with a threaded tube, a mounting plate, a bidirectional motor, a screw rod, a guide rod and a blowing assembly. The output shaft of the bidirectional motor drives the screw rod to rotate. Under the action of the threaded tube, the mounting plate can be lifted and moved on the guide rod, and the screw rod drives the cleaning block to rotate and move downward in the nozzle barrel, so that the raw materials attached to the inner wall of the nozzle barrel can be scraped and cleaned to avoid the phenomenon of raw materials remaining in the nozzle barrel. After the mounting plate is lowered, the blowing assembly blows air into the nozzle barrel, thereby accelerating the cleaning efficiency of the raw materials in the nozzle barrel and improving the cleaning effect of the nozzle barrel. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the installation of the utility model;

[0019] Figure 3 For this utility model Figure 2 A magnified schematic diagram of the structure in the middle.

[0020] Figure numerals: 1. nozzle barrel; 2. mounting hole; 3. nozzle; 4. connecting seat; 5. threaded pipe; 6. bidirectional motor; 7. mounting plate; 8. guide rod; 9. limit plate; 10. cleaning block; 11. air cylinder; 12. perforation; 13. linkage rod; 14. piston; 15. rubber bowl; 16. screw rod; 17. air pipe; 18. one-way valve; 19. connecting pipe; 20. heating block; 21. throat; 22. connecting hole. DETAILED DESCRIPTION

[0021] The utility model is further described in detail below with reference to the accompanying drawings and specific implementation methods:

[0022] Reference Figure 1-3 A high-precision nozzle for 3D printing includes a nozzle barrel 1, a mounting plate 7, a guide rod 8, a blowing assembly and a heating block 20.

[0023] A mounting hole 2 is provided on the nozzle barrel 1, and a nozzle 3 is installed in the mounting hole 2. The nozzle 3 is installed in a detachable manner, and the nozzle 3 can be conveniently disassembled, replaced, and cleaned. A threaded tube 5 is inlaid on the nozzle barrel 1, and a cleaning block 10 is arranged in the nozzle barrel 1. The bottom end of the cleaning block 10 matches the inner bottom wall of the nozzle barrel 1 to ensure the cleaning effect of the nozzle barrel 1 after the cleaning block 10 is lowered.

[0024] The mounting plate 7 is arranged above the nozzle barrel 1, and a bidirectional motor 6 is mounted on the mounting plate 7. A screw rod 16 is mounted on the output shaft of the bidirectional motor 6, and the bottom end of the screw rod 16 passes through the threaded tube 5 and is fixedly connected to the cleaning block 10. The screw rod 16 is threadedly connected to the threaded tube 5. When the output shaft of the bidirectional motor 6 drives the screw rod 16 to rotate, the threaded tube 5 can be used to lift and move the bidirectional motor 6, thereby causing the screw rod 16 to drive the cleaning block 10 to lift and rotate.

[0025] The guide rod 8 is slidably connected to the mounting plate 7, the bottom end of the guide rod 8 is fixedly connected to the nozzle barrel 1, and a limit plate 9 is fixedly connected to the guide rod 8, and the limit plate 9 is located above the mounting plate 7. The guide rod 8 is used to guide the movement of the mounting plate 7 to improve the stability of the movement of the mounting plate 7, and the limit plate 9 can limit the rising position of the mounting plate 7.

[0026] The blowing assembly is arranged on the nozzle barrel 1, and is used to move the mounting plate 7 downward to blow air to clean the nozzle barrel 1. The blowing assembly includes an air cylinder 11 fixedly connected to the nozzle barrel 1, and a through hole 12 is opened on the air cylinder 11. A linkage rod 13 is arranged in the through hole 12. One end of the linkage rod 13 is fixedly connected to the mounting plate 7, and the other end of the linkage rod 13 is fixedly connected to a piston 14, and a rubber bowl 15 is installed on the piston 14.

[0027] When the mounting plate 7 drives the piston 14 on the linkage rod 13 and the rubber bowl 15 to move upward in the air cylinder 11, external air can enter to the bottom of the rubber bowl 15 through the perforation 12 and the gap between the rubber bowl 15 and the air cylinder 11. When the mounting plate 7 drives the piston 14 on the linkage rod 13 and the rubber bowl 15 to move downward in the air cylinder 11, the rubber bowl 15 can pressurize the air below it.

[0028] An air pipe 17 is fixedly connected to the air cylinder 11, and one end of the air pipe 17 away from the air cylinder 11 is fixedly connected to the nozzle cylinder 1. A one-way valve 18 is installed on the air pipe 17. The air pipe 17 is used to transport the pressurized air on the air cylinder 11 to the nozzle cylinder 1, and the inner wall of the nozzle cylinder 1 is cleaned by blowing.

[0029] A connecting hole 22 is provided on the heating block 20, and a throat 21 and a connecting pipe 19 are installed in the connecting hole 22. A connecting seat 4 is fixedly connected to the nozzle barrel 1, and one end of the connecting seat 4 away from the nozzle barrel 1 is installed on the connecting pipe 19. The connecting hole 22 is used to transport the raw material through the throat 21 to the connecting pipe 19, and the heating block 20 can heat the raw material entering the connecting pipe 19 through the heating rod.

[0030] Working principle: when the connecting tube 19 stops discharging, the nozzle barrel 1 is moved to the discharging position, and then the bidirectional motor 6 is started so that the output shaft of the bidirectional motor 6 drives the screw 16 to rotate. Under the action of the threaded tube 5, the screw 16 can drive the cleaning block 10 to rotate and move downward. Subsequently, the bidirectional motor 6 will drive the mounting plate 7 to move downward on the guide rod 8. Then, the cleaning block 10 scrapes and cleans the inner wall of the nozzle barrel 1 and pushes the cleaned raw materials to the nozzle pipe 3. At the same time, the mounting plate 7 will drive the piston 14 and the rubber bowl 15 on the linkage rod 13 to move downward, so that the rubber bowl 15 can pressurize the air below it, and transport the pressurized air on the air cylinder 11 to the nozzle barrel 1 through the air pipe 17, and clean the inner wall of the nozzle barrel 1 by blowing. Finally, the waste material will be discharged from the nozzle barrel 1 through the nozzle pipe 3.

Claims

1. A high-precision nozzle for 3D printing, characterized in that: include: A nozzle barrel (1), wherein a mounting hole (2) is provided on the nozzle barrel (1), a nozzle (3) is installed in the mounting hole (2), a threaded tube (5) is embedded in the nozzle barrel (1), and a cleaning block (10) is arranged in the nozzle barrel (1); A mounting plate (7) is arranged above the nozzle barrel (1), a bidirectional motor (6) is mounted on the mounting plate (7), a screw rod (16) is mounted on the output shaft of the bidirectional motor (6), and the bottom end of the screw rod (16) passes through the threaded tube (5) and is fixedly connected to the cleaning block (10), and the screw rod (16) is threadedly connected to the threaded tube (5); A guide rod (8) is slidably connected to the mounting plate (7), and the bottom end of the guide rod (8) is fixedly connected to the nozzle barrel (1); The blowing assembly is arranged on the nozzle barrel (1) and is used to move the mounting plate (7) downward to blow and clean the inside of the nozzle barrel (1).

2. A high-precision nozzle for 3D printing according to claim 1, characterized in that: The guide rod (8) is fixedly connected to a limiting plate (9), and the limiting plate (9) is located above the mounting plate (7).

3. A high-precision nozzle for 3D printing according to claim 1, characterized in that: The blowing assembly comprises an air cylinder (11) fixedly connected to the nozzle cylinder (1), a through hole (12) being provided on the air cylinder (11), a linkage rod (13) being arranged in the through hole (12), one end of the linkage rod (13) being fixedly connected to the mounting plate (7), the other end of the linkage rod (13) being fixedly connected to a piston (14), and a rubber bowl (15) being installed on the piston (14).

4. A high-precision nozzle for 3D printing according to claim 3, characterized in that: The air cylinder (11) is fixedly connected to an air pipe (17), one end of the air pipe (17) away from the air cylinder (11) is fixedly connected to the nozzle cylinder (1), and a one-way valve (18) is installed on the air pipe (17).

5. The high-precision nozzle for 3D printing according to claim 1, characterized in that: The invention also comprises a heating block (20), wherein a connecting hole (22) is provided on the heating block (20), a throat (21) and a connecting pipe (19) are installed in the connecting hole (22), and a connecting seat (4) is fixedly connected to the nozzle barrel (1), and an end of the connecting seat (4) away from the nozzle barrel (1) is installed on the connecting pipe (19).

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