Spray head capable of moving in fan shape for 3D printer

Abstract

The invention belongs to the technical field of 3D printing nozzles and discloses a fan-shaped movable 3D printer nozzle which comprises a connecting plate and a fixing plate with the front end used for mounting a nozzle assembly, the lower end of the fixing plate is connected with a heat conduction pipe, a throat pipe penetrates through the interior of the heat conduction pipe, the lower end of the throat pipe is connected with a heating block, the lower end of the heating block is connected with a nozzle body, and a sliding groove is formed in the rear side of the fixing plate. A sliding block is arranged in the sliding groove, the rear side of the sliding block is connected with a rotating shaft, the rear end of the rotating shaft is connected with a connecting plate, a feeding motor is installed on the left side of the fixing plate, the right shaft end of the feeding motor is connected with a feeding gear, and an auxiliary gear is arranged on the rear side of the feeding gear. According to the 3D printer spray head capable of moving in the fan shape, by arranging the blockage clearing structure, consumables on the upper portion of the throat pipe can be rapidly cut off when blockage occurs, continuous feeding is avoided, air can be conveyed into the throat pipe, and the consumables left in the throat pipe are extruded outwards through air to be cleared away; and the blockage clearing convenience and the blockage clearing efficiency are improved.

Description

Technical Field

[0001] The invention relates to the technical field of 3D printing nozzles, in particular to a nozzle for a 3D printer which can move in a fan shape. Background Art

[0002] 3D printer is a rapid manufacturing device that creates three-dimensional objects by stacking materials layer by layer. It is widely used in product design, prototyping, parts manufacturing and other fields, with the advantages of high efficiency, flexibility and precision. The nozzle of 3D printer, as one of the core components of 3D printer, largely determines the quality of molding; the smoothness of the filament flowing out of the nozzle and the temperature of the filament directly affect the accuracy of 3D printing.

[0003] However, there are still some problems when using the existing fan-shaped movable 3D printer nozzle: There is an existing 3D printer nozzle anti-blocking mechanism with Chinese patent application number CN202022315477.2, which includes a shell, a joint is fixedly installed on the upper end surface of the shell, a mounting bracket is fixedly installed on the outer side of the shell, a radiator is fixedly installed on the left side of the mounting bracket, the radiator is provided with screw holes, a drive motor is fixedly installed in the radiator, and a rotating shaft is fixedly installed on the output shaft of the drive motor; but although the existing 3D printer nozzles have a certain anti-blocking effect, it is difficult to completely avoid the occurrence of blockage, and most of the existing 3D printing nozzles need to be disassembled for processing when they are blocked, which makes it difficult to clear the blockage and has low operating efficiency.

[0004] In view of the above problems, an innovative design is carried out based on the original fan-shaped movable nozzle for 3D printer. Summary of the invention

[0005] The purpose of the present invention is to provide a fan-shaped movable nozzle for a 3D printer to solve the problem mentioned in the above background technology that it is difficult to completely avoid clogging when using the existing nozzle for a 3D printer, but the existing nozzle needs to be disassembled when it is clogged, and it is difficult to clear the blockage and the operating efficiency is low.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a fan-shaped movable nozzle for a 3D printer, comprising a connecting plate and a fixing plate at the front end for mounting a nozzle assembly, the lower end of the fixing plate is connected to a temperature conducting tube, the inside of the temperature conducting tube runs through a throat, the lower end of the throat is connected to a heating block, and the lower end of the heating block is connected to a nozzle body: A slide groove is provided at the rear side of the fixed plate, and a slider is arranged inside the slide groove, a rotating shaft is connected to the rear side of the slider, and a rear end of the rotating shaft is connected to the connecting plate; A feeding motor is installed on the left side of the fixing plate, and a feeding gear is connected to the right shaft end of the feeding motor, and an auxiliary gear is arranged at the rear side of the feeding gear; The left side of the fixed plate is rotatably connected to the transmission rod, the upper end of the transmission rod is fixed to the transmission plate, and the guide tube is fixed to the right side of the transmission plate, and the lower end of the guide tube is connected to the cutting knife, the air guide tube is fixed to the rear side of the transmission plate, the upper end of the air guide tube is connected to the corrugated duct, and the piston assembly is fixed to the left side of the fixed plate.

[0007] Preferably, the throat is slidably connected to the thermal conduction tube, and the throat diameter is matched with the inner wall size of the thermal conduction tube, the right side of the thermal conduction tube is snap-connected to the radiator, and a cooling fan is fittedly installed on the right side of the radiator, and the radiator is bolted to the cooling fan.

[0008] By adopting the above technical solution, the temperature conducting tube and the throat can be adapted and installed, and they can be installed close to each other, ensuring that the heat can be smoothly and reliably transferred to the temperature conducting tube and the radiator. The cooperation of the radiator and the cooling fan can achieve rapid heat dissipation, avoid the increase of throat temperature causing the internal consumables to melt, and reduce the clogging of the nozzle body.

[0009] Preferably, the right shaft end of the feeding motor passes through the fixed plate, the upper end of the right side of the fixed plate is rotatably connected to the limit plate, and the lower end of the limit plate is rotatably connected to an auxiliary gear, and the auxiliary gear is meshingly connected with the feeding gear, the rear side of the limit plate is connected to a return spring, and the rear side of the return spring is fixed to the fixed plate.

[0010] By adopting the above technical solution, the feeding motor can drive the feeding gear to rotate. When loading the consumables, the reset spring is used to push the limit plate and the auxiliary gear connected to the lower end to rotate, so that the auxiliary gear and the feeding gear cooperate to clamp the consumables. When the feeding gear rotates, the consumables can be fed and transported.

[0011] Preferably, a lever is fixed to the upper end of the limit plate, and the lever is designed in an "L" shape. A through hole is opened in the middle of the lever, and the printing consumables pass through the through hole.

[0012] By adopting the above technical solution, the through hole in the middle of the lever is used to facilitate the passage of consumables, thereby avoiding affecting the feeding and conveying of the consumables. When the lever is pushed, the limit plate and the auxiliary gear can be driven to rotate synchronously, thereby adjusting the distance between the auxiliary gear and the feeding gear, thereby facilitating the reinstallation of the consumables.

[0013] Preferably, guide wheels are provided on the upper and lower sides of the feeding gear, and the guide wheels are rotatably connected to the fixed plate, the guide wheels are symmetrically distributed front and back, and a protective cover is provided on the right side cover of the guide wheel, and the protective cover is bolted to the fixed plate.

[0014] By adopting the above technical solution, through the design of two sets of guide wheels, the transportation of consumables can be guided, ensuring the guidance and positioning of both ends of the consumables, improving the feeding and conveying stability of the consumables, and utilizing the design of the protective cover to protect the guiding structure and the feeding structure.

[0015] Preferably, the slider is slidably connected to the slide groove, and the slider is fixed to the rotating shaft bolt, the rear end of the rotating shaft is rotatably connected to the connecting plate, and a driven gear is fixed to the rear end of the rotating shaft, the adjusting motor is fixed to the rear side of the connecting plate, and the front shaft end of the adjusting motor passes through the connecting plate, the front shaft end of the adjusting motor is connected to a driving gear, and the driving gear is meshingly connected to the driven gear.

[0016] By adopting the above technical solution, the driving gear can be driven to rotate by adjusting the motor. The driving gear and the driven gear cooperate with each other and can be rotated by driving the shaft and the fixed plate. When the fixed plate rotates, the angle of the nozzle body can be adjusted, thereby improving the flexibility of the printing path of the nozzle body and adapting to the printing needs of more complex structures.

[0017] Preferably, a first electric push rod is arranged at the upper end of the inner part of the slide groove, and the first electric push rod is fixed to the upper inner wall of the slide groove, and the lower end of the first electric push rod is fixed to the sliding block.

[0018] By adopting the above technical solution, the first electric push rod can drive the slider to move inside the slide slot, thereby changing the position of the axis of the fixed plate during rotation and changing the rotation range of the nozzle body.

[0019] Preferably, a power motor is fixed on the left side of the fixed plate, and the upper shaft end of the power motor is connected to the transmission rod, the guide tube is designed in a semicircular tube shape, the upper end of the throat is connected to a conduit, and the lower end of the cutting knife is flush with the upper end of the conduit.

[0020] By adopting the above technical solution, the transmission rod can be driven to rotate by the power motor, and the transmission rod drives the transmission plate, the guide tube and the cutting knife to rotate. When the cutting knife moves to the top of the catheter, the cutting knife can be used to cut the consumables inside the catheter to cut off the consumables, which is convenient for rapid processing when the consumables are blocked.

[0021] Preferably, the bottom of the air duct is flush with the upper end of the catheter, and the air duct is connected when the catheter overlaps, a second electric push rod is provided at the lower end of the piston assembly, and the second electric push rod is fixed to the fixed plate, an inlet and outlet check valve is installed at the upper end of the piston assembly, and the upper end of the outlet check valve is connected to the corrugated catheter, a piston is provided inside the piston assembly, and the upper end of the second electric push rod passes through the interior of the piston assembly and is connected to the piston.

[0022] By adopting the above technical solution, through the cooperation of the second electric push rod and the piston assembly, air supply to the air duct can be achieved when the second electric push rod is extended or retracted, and the cooperation of the corrugated conduit and the air duct can be used to transport air to the inside of the conduit and the throat. When the second electric push rod is quickly extended or retracted, high-pressure air can be provided to clean the consumables remaining in the throat and the nozzle body.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: the fan-shaped movable nozzle for a 3D printer is provided with a blockage clearing structure, which can quickly cut off the consumables on the upper part of the throat when blockage occurs, avoiding continuous feeding, and can transport air into the throat to squeeze the remaining consumables outward by air to clean them, thereby improving the convenience and efficiency of clearing blockages.

[0024] 1. By setting up an angle adjustment structure, the angle between the connecting plate and the fixed plate can be adjusted, thereby realizing the fan-shaped adjustment of the angle of the nozzle body. When printing different layers or different areas, the angle and swing speed of the fan-shaped activity can be adjusted as needed to meet different printing needs. When printing a large-area plane, the fan-shaped activity angle can be increased to reduce the number of round trips of the nozzle body and improve printing efficiency; when printing complex curved surfaces, the angle and trajectory of the fan-shaped swing can be precisely controlled to make the material fit the curved surface shape better and improve printing accuracy; 2. By setting up a precise feeding structure, the uniform feeding speed of the consumables can be maintained, the feeding accuracy of the consumables can be improved, and the nozzle body can be ensured to extrude the consumables at a uniform speed and evenly, so as to realize the printing of the workpiece, and further improve the printing quality and printing accuracy of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the left structure of the present invention; Figure 3 This is a schematic diagram of the structure of the heating block and the nozzle body of the present invention; Figure 4 This is a schematic diagram of the disassembled structure of the radiator and the cooling fan of the present invention; Figure 5 This is a schematic diagram of the structure of the slider and the rotating shaft of the present invention; Figure 6 This is a schematic diagram of the structure of the rotating shaft and the driven gear of the present invention; Figure 7 This is a schematic diagram of the structure of the slider and the slide groove of the present invention; Figure 8 It is a schematic diagram of the transmission plate and transmission rod structure of the present invention; Fig. 9 It is a schematic diagram of the structure of the piston assembly and the second electric push rod of the present invention.

[0026] In the figure: 1. connecting plate; 2. fixing plate; 3. temperature conducting tube; 4. throat; 5. heating block; 6. nozzle body; 7. radiator; 8. cooling fan; 9. feeding motor; 10. feeding gear; 11. limit plate; 12. auxiliary gear; 13. reset spring; 14. lever; 15. guide wheel; 16. protective cover; 17. adjusting motor; 18. driving gear; 19. rotating shaft; 20. slider; 21. driven gear; 22. slide; 23. first electric push rod; 24. transmission rod; 25. transmission plate; 26. guide tube; 27. cutting knife; 28. air guide tube; 29. ​​corrugated conduit; 30. piston assembly; 31. second electric push rod; 32. power motor. DETAILED DESCRIPTION

[0027] 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.

[0028] See also Figure 1-9 The present invention provides a technical solution: a fan-shaped movable nozzle for a 3D printer, comprising a connecting plate 1 and a fixing plate 2 for installing a nozzle assembly at the front end, the fixing plate 2 is connected to a temperature conducting tube 3 at the lower end, the temperature conducting tube 3 runs through a throat 4, the throat 4 is connected to a heating block 5 at the lower end, and the heating block 5 is connected to a nozzle body 6 at the lower end. When in use, the nozzle structure can be installed inside the 3D printer using the connecting plate 1 and connected to the pulley to ensure the level and stability of the connection between the connecting plate 1 and the slide, and the printing consumables are led into the throat 4, and the feeding structure is used to push the consumables to be transported into the throat 4. Before the printer is operated, the control system is used to control the heating block 5 to heat up, and a temperature detection element is also provided inside the heating block 5 to monitor the temperature in real time and feed the data back to the control system of the printer. The control system adjusts the heating power of the heating block 5 according to the feedback information to maintain a stable printing temperature; when the heating block 5 is heated to a preset temperature, the consumables continue to be fed and softened, and when the consumables continue to be fed, the consumables can be extruded from the lower end of the nozzle body 6 to achieve printing.

[0029] The throat 4 is slidably connected to the temperature conducting tube 3, and the diameter of the throat 4 is matched with the inner wall size of the temperature conducting tube 3. The right side of the temperature conducting tube 3 is snap-fitted to the radiator 7, and a cooling fan 8 is fitted on the right side of the radiator 7, and the radiator 7 is bolted to the cooling fan 8. When in use, the temperature conducting tube 3 and the throat 4 fit tightly after installation to maintain temperature transfer, avoid heat from the heating block 5 to the throat 4 during 3D printing, avoid heating of the throat 4 in advance of the hose consumables, reduce the probability of blockage of the nozzle structure, and the temperature conducting tube 3 can transmit the temperature of the throat 4 to the radiator 7 to improve the heat dissipation efficiency. At the same time, the cooling fan 8 will adjust the speed according to the temperature conditions to ensure that the radiator 7 can effectively dissipate heat and avoid excessive temperature in the throat 4.

[0030] A feeding motor 9 is installed on the left side of the fixed plate 2, and the right shaft end of the feeding motor 9 is connected to a feeding gear 10, and an auxiliary gear 12 is arranged on the rear side of the feeding gear 10; the right shaft end of the feeding motor 9 passes through the fixed plate 2, and the upper end of the right side of the fixed plate 2 is rotatably connected to the limit plate 11, and the lower end of the limit plate 11 is rotatably connected to the auxiliary gear 12, and the auxiliary gear 12 is meshed and connected with the feeding gear 10, and a return spring 13 is connected to the rear side of the limit plate 11, and the rear side of the return spring 13 is fixed to the fixed plate 2; a lever 14 is fixed to the upper end of the limit plate 11, and the lever 14 is designed in an "L" shape, and a through hole is opened in the middle of the lever 14, and the printing consumables pass through the inside of the through hole; guide wheels 15 are arranged on the upper and lower sides of the feeding gear 10, and the guide wheels 15 are rotatably connected to the fixed plate 2, and the guide wheels 15 are symmetrically distributed front and back, and a protective cover 16 is provided on the right side cover of the guide wheel 15, and the protective cover 16 is bolted to the fixed plate 2. In order to ensure the stable conveying of consumables during printing, a feeding structure is provided to lead the printing consumables from the consumable reel, pass through the through hole in the middle of the lever 14, between the feeding gear 10 and the auxiliary gear 12, and between the guide wheels 15, and finally feed them into the throat 4. During the insertion process, the lever 14 can be driven to drive the limit plate 11 and the auxiliary gear 12 to rotate, control the distance between the auxiliary gear 12 and the feeding gear 10, ensure that the consumables can pass through, and after the lever 14 is released, the reset spring 13 can push the limit plate 11 to reset, so that the auxiliary gear 12 and the feeding gear 10 clamp the consumables. During printing, the feeding motor 9 is started, and the feeding motor 9 drives the feeding gear 10 to rotate. Since the auxiliary gear 12 is meshed with the feeding gear 10, and the two clamp the consumables, the rotation of the feeding gear 10 will drive the consumables to move toward the throat 4; the two sets of guide wheels 15 guide and limit the consumables, ensuring that the consumables can accurately enter the throat 4, improving the stability of consumable transportation, and the protective cover 16 can prevent debris from entering the feeding area and protect the normal operation of the feeding structure. The feeding motor 9 is a servo motor that can accurately control the rotation speed, maintain a uniform feeding speed, and can control the feeding speed according to printing requirements.

[0031] A slide groove 22 is provided at the rear side of the fixed plate 2, and a slider 20 is arranged inside the slide groove 22, a rotating shaft 19 is connected to the rear side of the slider 20, and the rear end of the rotating shaft 19 is connected to the connecting plate 1; the slider 20 is slidably connected to the slide groove 22, and the slider 20 is bolted to the rotating shaft 19, the rear end of the rotating shaft 19 is rotatably connected to the connecting plate 1, and a driven gear 21 is fixed to the rear end of the rotating shaft 19, an adjusting motor 17 is fixed to the rear side of the connecting plate 1, and the front shaft end of the adjusting motor 17 passes through the connecting plate 1, and the front shaft end of the adjusting motor 17 is connected to the driving gear 18, and the driving gear 18 is meshed and connected with the driven gear 21; the upper end of the inner part of the slide groove 22 A first electric push rod 23 is provided, and the first electric push rod 23 is fixed to the upper inner wall of the slide groove 22, and the lower end of the first electric push rod 23 is fixed to the slider 20; during the printing process, the control system starts the adjusting motor 17, and the adjusting motor 17 drives the driving gear 18 to rotate. Since the driving gear 18 is meshed with the driven gear 21, the driven gear 21 drives the rotating shaft 19 to rotate, so that the fixed plate 2 and the nozzle assembly rotate around the rotating shaft 19, and the angle fan adjustment of the nozzle body 6 is realized. The adjusting motor 17 is a high-precision servo motor, which can accurately control the rotation angle of the nozzle body 6 and improve the printing accuracy. When printing different layers or different areas, the angle and swing speed of the fan-shaped activity can be adjusted as needed to adapt to different printing requirements, and the distance between the nozzle body 6 and the center of the rotation axis of the fixed plate 2 can be adjusted according to the size of the workpiece. The first electric push rod 23 is used to push the slider 20 to move inside the slide groove 22 to control the rotation range of the nozzle body 6 at the same rotation angle. When printing a large-area flat surface, the fan-shaped activity angle can be increased to reduce the number of round trips of the nozzle body 6 and improve printing efficiency. When printing complex curved surfaces, the angle and trajectory of the fan-shaped swing can be precisely controlled to make the material fit the curved surface shape better and improve printing accuracy.

[0032] The left side of the fixed plate 2 is rotatably connected to the transmission rod 24, the upper end of the transmission rod 24 is fixed to the transmission plate 25, and the right side of the transmission plate 25 is fixed to the guide tube 26, and the lower end of the guide tube 26 is connected to the cutting knife 27, the rear side of the transmission plate 25 is fixed to the air guide tube 28, the upper end of the air guide tube 28 is connected to the corrugated guide tube 29, and the left side of the fixed plate 2 is fixed to the piston assembly 30; the left side of the fixed plate 2 is fixed to the power motor 32, and the upper shaft end of the power motor 32 is connected to the transmission rod 24, the guide tube 26 is designed in a semicircular tube shape, and the upper end of the throat 4 is connected There is a conduit, the lower end of the cutting knife 27 is flush with the upper end of the conduit; the bottom of the air guide tube 28 is flush with the upper end of the conduit, and the air guide tube 28 is connected when it overlaps with the conduit. The lower end of the piston assembly 30 is provided with a second electric push rod 31, and the second electric push rod 31 is fixed to the fixed plate 2. The upper end of the piston assembly 30 is installed with an inlet and outlet check valve, and the upper end of the outlet check valve is connected to the corrugated conduit 29. The piston assembly 30 is provided with a piston inside, and the upper end of the second electric push rod 31 penetrates into the piston assembly 30 and is connected to the piston. When the nozzle body 6 is blocked or it is necessary to stop feeding or replace consumables, the power motor 32 is started to drive the transmission rod 24 to rotate, and the transmission rod 24 drives the transmission plate 25 to rotate, so that the cutting knife 27 below the guide tube 26 rotates to the conduit position at the upper end of the throat 4 to cut the consumables. After the cutting is completed, the nozzle body 6 and the throat 4 can be cleaned. The power motor 32 continues to drive the transmission plate 25 to rotate, and the air guide tube 28 moves to the top of the tube and overlaps. Since the upper end of the piston assembly 30 is equipped with an inlet and outlet check valve, the piston assembly 30 is a sealed tube designed with an opening at the bottom, and a piston is arranged inside. When the second electric push rod 31 pushes the piston in the piston assembly 30 to move downward, the external air enters the piston assembly 30 through the inlet check valve, and when the piston moves upward again, the internal air is pushed to be transported to the corrugated tube 29 through the outlet check valve, and the air enters the air guide tube 28 through the corrugated tube 29; the throat 4 is blown and cleaned to prevent the residual consumables from blocking the throat 4, and the system controls the material to stop feeding when the throat 4 is cleaned. After the throat 4 is cleaned, the power motor 32 is started again to rotate in the opposite direction, driving the guide tube 26 and the cutting knife 27 to reset. The guide tube 26 is designed as a semicircular tube. After the consumables are cut, the consumables can be guided to the side of the conduit, so that after the guide tube 26 is reset, the flexible consumables can be reset to the upper end of the conduit. The upper end of the conduit is designed as a bucket. When loading the consumables for the next printing, the consumables can enter the throat 4 smoothly without manual adjustment again, thereby improving the convenience of operation.

[0033] Embodiment 2: The difference between this embodiment and embodiment 1 is that the air supply method for cleaning the throat 4 is different. Embodiment 2 adopts a compressed gas tank for air supply and cooperates with a solenoid valve for control. When the catheter and the air duct 28 overlap, the solenoid valve is controlled to be turned on, and high-pressure air can continue to flow into the throat 4 to achieve cleaning of consumables. The cleaning effect is good and the efficiency is higher. However, this embodiment has a higher cost and needs to replace the compressed gas tank after the compressed air is used. The structure of embodiment 1 is relatively simple to use and the cost is lower.

[0034] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in the field. Although the embodiments of the present invention have been shown and described, it is understood by ordinary technicians in the field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A fan-shaped movable nozzle for a 3D printer, comprising a connecting plate (1) and a fixing plate (2) at the front end for mounting a nozzle assembly, the fixing plate (2) having a lower end connected to a temperature conducting tube (3), the temperature conducting tube (3) having a throat (4) passing through the inside, the throat (4) having a lower end connected to a heating block (5), the heating block (5) having a lower end connected to a nozzle body (6), characterized in that: A slide groove (22) is provided on the rear side of the fixed plate (2), and a slider (20) is arranged inside the slide groove (22). The rear side of the slider (20) is connected to a rotating shaft (19), and the rear end of the rotating shaft (19) is connected to the connecting plate (1); A feeding motor (9) is installed on the left side of the fixing plate (2), and a feeding gear (10) is connected to the right shaft end of the feeding motor (9), and an auxiliary gear (12) is arranged on the rear side of the feeding gear (10); The left side of the fixed plate (2) is rotatably connected to a transmission rod (24), the upper end of the transmission rod (24) is fixed to a transmission plate (25), and the right side of the transmission plate (25) is fixed to a guide tube (26), and the lower end of the guide tube (26) is connected to a cutting knife (27), the rear side of the transmission plate (25) is fixed to an air guide tube (28), the upper end of the air guide tube (28) is connected to a corrugated conduit (29), and the left side of the fixed plate (2) is fixed to a piston assembly (30).

2. The fan-shaped movable nozzle for a 3D printer according to claim 1, characterized in that: The throat (4) is slidably connected to the heat conducting tube (3), and the diameter of the throat (4) is matched to the inner wall size of the heat conducting tube (3). The right side of the heat conducting tube (3) is snap-connected to the radiator (7), and a heat dissipation fan (8) is fittedly installed on the right side of the radiator (7), and the radiator (7) and the heat dissipation fan (8) are bolted together.

3. The fan-shaped movable nozzle for a 3D printer according to claim 1, characterized in that: The right shaft end of the feeding motor (9) passes through the fixed plate (2); the upper end of the right side of the fixed plate (2) is rotatably connected to the limit plate (11); the lower end of the limit plate (11) is rotatably connected to the auxiliary gear (12); and the auxiliary gear (12) is meshedly connected with the feeding gear (10); the rear side of the limit plate (11) is connected to the return spring (13), and the rear side of the return spring (13) is fixed to the fixed plate (2).

4. The fan-shaped movable nozzle for a 3D printer according to claim 3, characterized in that: A lever (14) is fixed to the upper end of the limit plate (11), and the lever (14) is designed to be "L"-shaped. A through hole is opened in the middle of the lever (14), and the printing consumables pass through the interior of the through hole.

5. The fan-shaped movable nozzle for a 3D printer according to claim 2, characterized in that: Guide wheels (15) are provided on the upper and lower sides of the feeding gear (10), and the guide wheels (15) are rotatably connected to the fixing plate (2). The guide wheels (15) are symmetrically distributed front and back. A protective cover (16) is provided on the right side cover of the guide wheel (15), and the protective cover (16) is bolted to the fixing plate (2).

6. The fan-shaped movable nozzle for a 3D printer according to claim 1, characterized in that: The slider (20) is slidably connected to the slide groove (22), and the slider (20) is bolted to the rotating shaft (19). The rear end of the rotating shaft (19) is rotatably connected to the connecting plate (1), and a driven gear (21) is fixed to the rear end of the rotating shaft (19). The adjusting motor (17) is fixed to the rear side of the connecting plate (1), and the front shaft end of the adjusting motor (17) passes through the connecting plate (1). The front shaft end of the adjusting motor (17) is connected to a driving gear (18), and the driving gear (18) is meshingly connected to the driven gear (21).

7. The fan-shaped movable nozzle for a 3D printer according to claim 6, characterized in that: A first electric push rod (23) is arranged at the upper end of the interior of the slide groove (22), and the first electric push rod (23) is fixed to the upper inner wall of the slide groove (22), and the lower end of the first electric push rod (23) is fixed to the slide block (20).

8. The fan-shaped movable nozzle for a 3D printer according to claim 1, characterized in that: A power motor (32) is fixed on the left side of the fixing plate (2), and the upper shaft end of the power motor (32) is connected to the transmission rod (24). The guide tube (26) is designed in a semicircular tube shape. The upper end of the throat tube (4) is connected to a conduit, and the lower end of the cutting knife (27) is flush with the upper end of the conduit.

9. The fan-shaped movable nozzle for a 3D printer according to claim 8, characterized in that: The bottom of the air guide tube (28) is flush with the upper end of the conduit, and the air guide tube (28) and the conduit are connected when they overlap; a second electric push rod (31) is provided at the lower end of the piston assembly (30), and the second electric push rod (31) is fixed to the fixing plate (2); an inlet and outlet check valve is installed at the upper end of the piston assembly (30), and the upper end of the outlet check valve is connected to the corrugated conduit (29); a piston is provided inside the piston assembly (30), and the upper end of the second electric push rod (31) penetrates into the piston assembly (30) and is connected to the piston.

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