Extrusion nozzle of high-speed 3D printer

Abstract

The utility model discloses an extrusion nozzle of a high-speed 3D (three-dimensional) printer, which adopts a self-adaptive wire conveying module, and realizes stable and uniform conveying of consumables with different materials and specifications through the synergistic effect of a conveying gear, a fixed shaft, a transmission sleeve, a rotating wheel, a supporting table, a positioning column and a spring. Sliding and breakage of consumables are avoided, extrusion efficiency and precision are improved, a wrench does not need to be manually adjusted to adapt to conveying of different consumables, operation is easy and convenient, a miniature design is adopted, the extruder, the throat pipe, the heating block and the nozzle are compactly arranged in the assembly shell, the size and weight of the extrusion device are reduced, the printing space is increased, and the printing efficiency is improved. The inertia of the printing head is reduced, the printing speed and quality are improved, the structure of the extrusion device is optimized, all assemblies can be rapidly separated and assembled through fixing and loosening of the bolts, cleaning, maintenance and operation are convenient, and firmness and stability of parts are guaranteed.

Description

Technical Field

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

[0002] Micro 3D printers are small, lightweight, and easy-to-use 3D printing devices that can be used at home, in schools, and in maker spaces to meet the creative needs of individuals and small teams. Micro 3D printers usually use fused deposition modeling (FDM) technology, which heats and extrudes thermoplastic materials to stack them layer by layer into the desired three-dimensional shape.

[0003] In the prior art, when printing entities using fused deposition modeling technology, an extruder is required to provide consumables to the print head. When the consumables are printed, the consumables need to be replenished in time. At present, the traditional extruder has certain defects when used:

[0004] 1. Due to the different materials and specifications of consumables, when the extruder conveys the consumables, it is necessary to manually adjust the wrench to adapt to the conveying of different consumables, which is a cumbersome operation;

[0005] 2. The structure of the extruder needs to be optimized, which occupies a large space and indirectly leads to the limitation of printing space;

[0006] 3. The heat dissipation performance needs to be improved. Excessive temperature of the extruder can easily cause instability in the molding of the consumables and affect the printing quality;

[0007] 4. Limited by the small space of the micro 3D printer, it is impossible to achieve high-level printing of the extrusion nozzle by adding additional components.

[0008] Therefore, how to design a high-speed 3D printer extrusion nozzle that can not only improve extrusion efficiency and accuracy, but also improve the heat dissipation structure and disassembly method, and improve the applicability to the transportation of different consumables, is a problem that needs to be urgently solved in the current technical field. Utility Model Content

[0009] The purpose of the utility model is to provide a high-speed 3D printer extrusion nozzle to solve the problems existing in the existing 3D printer extrusion device mentioned in the above background technology.

[0010] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-speed 3D printer extrusion nozzle, comprising an assembly shell, a shifting mounting seat, a wire transmission module, an extrusion hot end, a throat and a nozzle;

[0011] The top of the shift mounting seat is fixedly connected with a speed reduction mechanism, the back of the speed reduction mechanism is fixedly connected with an electric control module via bolts, and the front side of the shift mounting seat is fixedly connected with a heat dissipation aluminum block;

[0012] The wire transmission module is fixedly connected to the front side of the electric control module by bolts, a blast fan is fixedly connected to the left side of the wire transmission module by bolts, a wire transmission channel is opened through the inner side of the wire transmission module, a motor shaft of the speed reduction mechanism is fixedly connected to a transmission gear on the inner side of the wire transmission module, and a fixed shaft is fixedly connected to the inner side of the wire transmission module, a transmission sleeve is movable sleeved on the fixed shaft, a rotating wheel is rotatably connected to the inner side of the transmission sleeve through a rotating shaft, a support is integrally connected to the side of the transmission sleeve, and a positioning column is fixedly connected to the top of the support;

[0013] The heat dissipation aluminum block is fixedly connected to the front side of the wire transmission module with a heat dissipation fan by bolts, and the left side of the heat dissipation aluminum block is fixedly connected to an air guide groove by bolts, and the air guide groove is fixedly connected to the bottom of the blast fan;

[0014] The extrusion hot end is arranged directly below the heat dissipation aluminum block, and an electric heating block is installed inside the extrusion hot end;

[0015] The top of the throat is connected to the inner side of the wire transmission module, the upper end of the throat is fixedly penetrated into the inner side of the heat dissipation aluminum block, and the lower end of the throat is fixedly connected to the top of the extrusion hot end;

[0016] The nozzle is fixedly connected to the bottom of the extrusion hot end;

[0017] The assembly shell is arranged on the outside of the speed reduction mechanism, the wire transmission module, the electric control module, the heat dissipation aluminum block, the heat dissipation fan, the extrusion hot end, and the throat, and the blast fan and the air guide groove are arranged on the outside of the assembly shell.

[0018] Preferably, the surface of the rotating wheel is provided with an annular groove along its own circumferential direction.

[0019] Preferably, a cylindrical groove is opened on the inner side of the wire transmission module, a spring is connected in the cylindrical groove, and the spring is sleeved on the outer side of the positioning column.

[0020] Preferably, a plurality of groups of strip grooves are provided on the front side and the rear side of the heat dissipation aluminum block.

[0021] Preferably, the upper opening of the air guide groove is connected to the output end of the blower fan, and the lower opening of the air guide groove corresponds to the position of the nozzle.

[0022] Preferably, the height of the extrusion hot end is 13 to 200 mm.

[0023] Preferably, the extrusion diameter of the nozzle is 0.1-3 mm.

[0024] Preferably, the gear teeth of the transmission gear are pointed structures, the gear teeth angle of the transmission gear is 5-30°, the tempering hardness HRC of the transmission gear is 20-65, and the outer diameter of the transmission gear is 5-20 mm.

[0025] Preferably, the deceleration mechanism consists of a drive motor and a reducer, the output end of the drive motor is connected to the input end of the reducer, the output end of the reducer is fixedly connected to the transmission gear, and the reduction ratio of the drive motor and the reducer is 2:1 to 20:1.

[0026] Compared with the prior art, the beneficial effects of the utility model are:

[0027] 1. The high-speed 3D printer extruder nozzle adopts an adaptive wire transmission module. Through the coordinated action of transmission gears, fixed shafts, transmission sleeves, wheels, brackets, positioning columns and springs, it realizes the smooth and uniform transmission of consumables of different materials and specifications, avoids the sliding and breaking of consumables, improves the extrusion efficiency and accuracy, and does not need to manually adjust the wrench to adapt to the transmission of different consumables. It is easy to operate;

[0028] 2. The high-speed 3D printer extruder nozzle adopts a miniature design, which compactly arranges the extruder, throat, heating block and nozzle in the assembly shell, reduces the volume and weight of the extruder, increases the printing space, reduces the inertia of the print head, improves the printing speed and quality, and optimizes the structure of the extruder;

[0029] 3. The high-speed 3D printer extruder nozzle adopts an optimized heat dissipation structure. Through the combination of heat dissipation aluminum block, heat dissipation fan, blower fan and air guide slot, it realizes effective heat dissipation of each component, reduces the temperature of the extrusion device, reduces the risk of thermal degradation and clogging of consumables, expands the range of printable materials, and improves the stability of consumable molding;

[0030] 4. The high-speed 3D printer extrusion nozzle adopts a simple disassembly method. By fixing and loosening the bolts, the components can be quickly separated and assembled, which is convenient for cleaning and maintenance, easy to operate, and ensures the firmness and stability of the parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a structural schematic diagram of a high-speed 3D printer extrusion nozzle of the utility model;

[0032] Figure 2 This is another structural schematic diagram of a high-speed 3D printer extrusion nozzle of the utility model;

[0033] Figure 3 This is a schematic diagram of the assembly shell structure of a high-speed 3D printer extrusion nozzle of the utility model;

[0034] Figure 4 This is a structural schematic diagram of a high-speed 3D printer extrusion nozzle after the assembly shell is removed;

[0035] Figure 5 This is another structural schematic diagram of a high-speed 3D printer extrusion nozzle of the utility model after the assembly shell is removed;

[0036] Figure 6 This is a partial structural schematic diagram of a high-speed 3D printer extrusion nozzle of the utility model;

[0037] Figure 7 This is another partial structural schematic diagram of a high-speed 3D printer extrusion nozzle of the utility model;

[0038] Figure 8 This is a schematic diagram of the transmission sleeve structure of a high-speed 3D printer extrusion nozzle of the utility model;

[0039] Fig. 9 This is a schematic diagram of the wheel structure of a high-speed 3D printer extrusion nozzle of the utility model;

[0040] Fig.10 This is a schematic diagram of the heat dissipation aluminum block structure of a high-speed 3D printer extrusion nozzle of the utility model;

[0041] Fig.11 It is a front structural cross-sectional view of the minimum height of the extrusion hot end of the extrusion nozzle of a high-speed 3D printer of the utility model;

[0042] Fig.12 This is a front structural cross-sectional view of the maximum height of the extrusion hot end of a high-speed 3D printer extrusion nozzle of the utility model;

[0043] Fig.13 This is a specification diagram of a transmission gear for a high-speed 3D printer extrusion nozzle of the utility model.

[0044] In the figure:

[0045] 1. Assemble the housing; 2. Shifting mounting seat; 3. Speed ​​reduction mechanism;

[0046] 4. Wire transmission module; 401. Wire transmission channel; 402. Transmission gear;

[0047] 403, fixed shaft; 404, transmission sleeve; 405, rotating wheel;

[0048] 4051, annular groove; 406, support platform; 407, positioning column;

[0049] 408, cylindrical groove; 409, spring;

[0050] 5. Electric control module; 6. Heat dissipation aluminum block; 601, strip groove;

[0051] 7. Cooling fan; 8. Extrusion hot end; 9. Throat;

[0052] 10. Blower fan; 11. Air guide slot; 12. Nozzle;

[0053] 13. Electric heating block, 14. Consumable wire. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0055] In the description of the utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0056] In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0057] See also Figure 1-13 The utility model provides a technical solution: a high-speed 3D printer extrusion nozzle, including an assembly shell 1, a shifting mounting seat 2, a wire transmission module 4, an extrusion hot end 8, a throat 9 and a nozzle 12.

[0058] A speed reduction mechanism 3 is fixedly connected to the top of the tilt-shift mounting seat 2 , an electric control module 5 is fixedly connected to the back of the speed reduction mechanism 3 via bolts, and a heat dissipation aluminum block 6 is fixedly connected to the front side of the tilt-shift mounting seat 2 .

[0059] The wire transmission module 4 is fixedly connected to the front side of the electric control module 5 by bolts, and the left side of the wire transmission module 4 is fixedly connected to the blower fan 10 by bolts. A wire transmission channel 401 is opened on the inner side of the wire transmission module 4, and the motor shaft of the reduction mechanism 3 is fixedly connected to the inner side of the wire transmission module 4, and the inner side of the wire transmission module 4 is fixedly connected to a fixed shaft 403, a transmission sleeve 404 is movably sleeved on the fixed shaft 403, and a rotating wheel 405 is rotatably connected to the inner side of the transmission sleeve 404 through a rotating shaft, and a support platform 406 is integrally connected to the side of the transmission sleeve 404, and a positioning column 407 is fixedly connected to the top of the support platform 406.

[0060] The speed reduction mechanism 3 is composed of a driving motor and a speed reducer, the output end of the driving motor is connected to the input end of the speed reducer, the output end of the speed reducer is fixedly connected to the transmission gear 402, and the speed reduction ratio of the driving motor and the speed reducer is 2:1 to 20:1. Specifically, by setting the speed reduction mechanism 3, the bite force of the wire feeding of the consumables can be effectively improved, so that the extrusion force is increased and the extrusion efficiency is improved.

[0061] The surface of the rotating wheel 405 is provided with an annular groove 4051 along its own circumferential direction. Specifically, the annular groove 4051 is provided so that the consumable filament can be inserted into the inner side of the rotating wheel 405, which, on the one hand, increases the contact area between the consumable filament and the rotating wheel 405, increases the friction between the rotating wheel 405 and the consumable filament, and avoids the sliding and breaking of the material; on the other hand, it can prevent the consumable filament from sliding off the rotating wheel 405 during the transmission process, thereby improving the extrusion efficiency and precision.

[0062] A cylindrical groove 408 is provided on the inner side of the wire transmission module 4, and a spring 409 is connected to the cylindrical groove 408. The spring 409 is sleeved on the outer side of the positioning column 407. Figure 7 , the spring 409 exerts elastic force on the support 406 and the transmission sleeve 404, so that the transmission sleeve 404 and the rotating wheel 405 tend to move toward the side of the transmission gear 402. As the consumable wire passes through the wire transmission channel 401, the spring 409 makes one side of the consumable wire close to the rotating wheel 405, and the other side of the consumable wire close to the surface of the transmission gear 402, which can adapt to consumable wires of different diameters and ensure the stability of the wire transmission. Then, the transmission gear 402 is driven to rotate through the speed reduction mechanism 3, and with the corresponding rotation of the rotating wheel 405, The stable conveying of consumable filaments is realized, and the cylindrical groove 408 and the positioning column 407 have a positioning effect on the spring 409 to avoid the displacement of the position of the spring 409. Through the coordinated action of the transmission gear 402, the fixed shaft 403, the transmission sleeve 404, the rotating wheel 405, the support 406, the positioning column 407 and the spring 409, the consumables of different materials and specifications are smoothly and evenly conveyed, the sliding and breaking of the consumables are avoided, the extrusion efficiency and precision are improved, and there is no need to manually adjust the wrench to adapt to the conveying of different consumables, and the operation is simple.

[0063] The transmission gear 402 has a pointed tooth structure, a tooth angle of the transmission gear 402 of 5 to 30 degrees, a tempering hardness HRC of the transmission gear 402 of 20 to 65, and an outer diameter of the transmission gear 402 of 5 to 20 mm. Specifically, the transmission gear 402 with a pointed tooth structure has better bite force, and can achieve stable contact and transmission of the consumable wire.

[0064] Specifically, for consumables of different materials and specifications, spring 409 can be replaced and adjusted according to actual use needs. The greater the elastic force, the stronger the clamping force on the consumables, thereby the stronger the extrusion force, the greater the feeding force, and the higher the adaptability to consumables with higher hardness.

[0065] The heat dissipation aluminum block 6 is fixedly connected to the front side of the wire transmission module 4 with a heat dissipation fan 7 by bolts, and the left side of the heat dissipation aluminum block 6 is fixedly connected to an air guide groove 11 by bolts, and the air guide groove 11 is fixedly connected to the bottom of the blast fan 10.

[0066] The upper opening of the air guide groove 11 is connected to the output end of the blast fan 10, and the lower opening of the air guide groove 11 corresponds to the position of the nozzle 12. Specifically, the wind force of the blast fan 10 is guided to the position of the nozzle 12 through the air guide groove 11, which speeds up the cooling speed of the material and improves the quality of printing.

[0067] The front and rear sides of the heat dissipation aluminum block 6 are provided with a plurality of strip grooves 601. Specifically, by providing a plurality of strip grooves 601, the heat dissipation area of ​​the heat dissipation aluminum block 6 is increased while the volume of the heat dissipation aluminum block 6 is reduced, the heat dissipation effect is improved, and the risk of thermal degradation and clogging of the material is reduced.

[0068] Specifically, the high-speed 3D printer extrusion nozzle adopts an optimized heat dissipation structure. Through the combination of the heat dissipation aluminum block 6, the heat dissipation fan 7, the blower fan 10 and the air guide groove 11, effective heat dissipation of each component is achieved, the temperature of the extrusion device is reduced, the risk of thermal degradation and clogging of the consumables is reduced, the range of printable materials is expanded, and the stability of consumable molding is improved.

[0069] The extrusion hot end 8 is arranged directly below the heat dissipation aluminum block 6, and an electric heating block 13 is installed inside the extrusion hot end 8. Specifically, since the throat 9 first passes through the heat dissipation aluminum block 6 and then enters the extrusion hot end 8, the consumable wire in the throat 9 in the heat dissipation aluminum block 6 can be prevented from being affected by the excessively high temperature of the extrusion hot end 8, and the consumable wire is kept in the filament shape in the throat 9. When the consumable wire enters the extrusion hot end 8, it is heat-melted by the heating effect of the electric heating block 13, and the hot-melt material is extruded through the nozzle 12.

[0070] Specifically, the electric control module 5 is electrically connected to the electric heating block 13 .

[0071] The top of the throat pipe 9 is connected to the inner side of the wire transmission module 4 , the upper end of the throat pipe 9 is fixedly penetrated through the inner side of the heat dissipation aluminum block 6 , and the lower end of the throat pipe 9 is fixedly connected to the top of the extrusion hot end 8 .

[0072] The nozzle 12 is fixedly connected to the bottom of the extrusion hot end 8 .

[0073] The height of the extrusion hot end 8 is 13 to 200 mm.

[0074] For details, please refer to the attached manual. Figure 3 , Instruction Manual Figure 6 , Instruction Manual Fig.11 At this time, the height of the extrusion hot end 8 is 13 mm, the electric heating block 13 is transversely arranged in the extrusion hot end 8, and the diameter of the consumable wire 14 is 1.75 mm.

[0075] For details, please refer to the attached manual. Fig.12 At this time, the height of the extrusion hot end 8 is 200 mm, the electric heating block 13 can be vertically penetrated in the extrusion hot end 8, and the diameter of the consumable wire 14 is 1.75 mm.

[0076] Specifically, according to actual use requirements, extrusion hot ends 8 of different height specifications can be installed, and the specifications of the air guide groove 11, the throat 9, and the electric heating block 13 can be adjusted accordingly. The extrusion hot end 8 serves as the hot end for heating consumables. After increasing the height of the extrusion hot end 8, the cavity space of the throat 9 located in the extrusion hot end 8 for heating the consumables becomes larger, thereby improving the heating capacity of the consumables, thereby increasing the hot melt flow rate of the printing consumables, and then increasing the printing rate.

[0077] Specifically, the power of the heating block 13 is 20-1000w.

[0078] Specifically, the overall weight of the extrusion nozzle of the high-speed 3D printer is 100 to 500 g. Reducing the overall weight of the extrusion nozzle can achieve more stable high-speed printing.

[0079] Specifically, the types of consumables that can be adapted to the high-speed 3D printer extrusion nozzle include but are not limited to PLA, PETG, TPU, ABS, PA, PC and other non-metallic polymer material printing consumables. The diameter of the consumables is 0.5 to 10 mm. The conventional consumables 14 in the prior art have diameters of 1.75 mm, 2.85 mm, 3 mm and other specifications.

[0080] The extrusion aperture of the nozzle 12 is 0.1 to 3 mm. Specifically, according to actual use requirements, nozzles 12 with different extrusion apertures can be replaced. Reducing the extrusion aperture of the nozzle 12 can achieve higher precision printing requirements, and increasing the extrusion aperture of the nozzle 12 can achieve higher speed printing requirements.

[0081] The assembly shell 1 is arranged on the outside of the speed reduction mechanism 3, the wire transmission module 4, the electronic control module 5, the heat dissipation aluminum block 6, the heat dissipation fan 7, the extrusion hot end 8, and the throat 9, and the blower fan 10 and the air guide groove 11 are arranged on the outside of the assembly shell 1.

[0082] For details, please refer to the attached manual. Figure 1-5 The assembly housing 1 adopts a special structure, the back and bottom of which are completely open, and the inner walls on both sides are in close contact with the corresponding components, which is more conducive to heat conduction.

[0083] Specifically, the micro 3D printer extrusion nozzle compactly arranges the deceleration mechanism 3, the wire transmission module 4, the electronic control module 5, the heat dissipation aluminum block 6, the heat dissipation fan 7, the extrusion hot end 8, the throat 9 and other components in the assembly shell 1, which reduces the volume and weight of the extrusion device, increases the printing space, reduces the inertia of the print head, improves the printing speed and quality, and optimizes the structure of the extrusion device.

[0084] Specifically, the high-speed 3D printer extrusion nozzle adopts a simple disassembly method. Through the fixing and loosening of bolts, the components can be quickly separated and assembled, which is convenient for cleaning and maintenance, easy to operate, and ensures the firmness and stability of the parts.

[0085] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-speed 3D printer extrusion nozzle, characterized in that: It comprises an assembly shell (1), an axis-shifting mounting seat (2), a wire transmission module (4), an extrusion hot end (8), a throat (9) and a nozzle (12); The top of the shift mounting seat (2) is fixedly connected to a speed reducing mechanism (3), the back of the speed reducing mechanism (3) is fixedly connected to an electric control module (5) via bolts, and the front side of the shift mounting seat (2) is fixedly connected to a heat dissipation aluminum block (6); The wire transmission module (4) is fixedly connected to the front side of the electric control module (5) by bolts, the left side of the wire transmission module (4) is fixedly connected to a blast fan (10) by bolts, the inner side of the wire transmission module (4) is provided with a wire transmission channel (401), the motor shaft of the speed reduction mechanism (3) is fixedly connected to the inner side of the wire transmission module (4), and the inner side of the wire transmission module (4) is fixedly connected to a fixed shaft (403), a transmission sleeve (404) is movably sleeved on the fixed shaft (403), the inner side of the transmission sleeve (404) is rotatably connected to a rotating wheel (405) via a rotating shaft, the side of the transmission sleeve (404) is integrally connected to a support platform (406), and the top of the support platform (406) is fixedly connected to a positioning column (407); The heat dissipation aluminum block (6) and the front side of the wire transmission module (4) are fixedly connected to a heat dissipation fan (7) by bolts, and the left side of the heat dissipation aluminum block (6) is fixedly connected to an air guide groove (11) by bolts, and the air guide groove (11) is fixedly connected to the bottom of the blast fan (10); The extrusion hot end (8) is arranged directly below the heat dissipation aluminum block (6), and an electric heating block (13) is installed inside the extrusion hot end (8); The top of the throat pipe (9) is connected to the inner side of the wire transmission module (4), the upper end of the throat pipe (9) is fixedly penetrated into the inner side of the heat dissipation aluminum block (6), and the lower end of the throat pipe (9) is fixedly connected to the top of the extrusion hot end (8); The nozzle (12) is fixedly connected to the bottom of the extrusion hot end (8); The assembly shell (1) is arranged on the outside of the speed reduction mechanism (3), the wire transmission module (4), the electric control module (5), the heat dissipation aluminum block (6), the heat dissipation fan (7), the extrusion hot end (8), and the throat (9), and the blast fan (10) and the air guide groove (11) are arranged on the outside of the assembly shell (1).

2. A high-speed 3D printer extrusion nozzle according to claim 1, characterized in that: The surface of the rotating wheel (405) is provided with an annular groove (4051) along its own circumferential direction.

3. A high-speed 3D printer extrusion nozzle according to claim 1, characterized in that: A cylindrical groove (408) is provided on the inner side of the wire transmission module (4), a spring (409) is connected inside the cylindrical groove (408), and the spring (409) is sleeved on the outer side of the positioning column (407).

4. A high-speed 3D printer extrusion nozzle according to claim 1, characterized in that: The front side and the rear side of the heat dissipation aluminum block (6) are both provided with a plurality of groups of strip-shaped grooves (601).

5. A high-speed 3D printer extrusion nozzle according to claim 1, characterized in that: The upper opening of the air guide groove (11) is connected to the output end of the air blast fan (10), and the lower opening of the air guide groove (11) corresponds to the position of the nozzle (12).

6. A high-speed 3D printer extrusion nozzle according to claim 1, characterized in that: The height of the extrusion hot end (8) is 13 to 200 mm.

7. A high-speed 3D printer extrusion nozzle according to claim 1, characterized in that: The extrusion aperture of the nozzle (12) is 0.1 to 3 mm.

8. A high-speed 3D printer extrusion nozzle according to claim 1, characterized in that: The gear teeth of the transmission gear (402) are pointed structures, the gear tooth angle of the transmission gear (402) is 5 to 30 degrees, the tempering hardness HRC of the transmission gear (402) is 20 to 65, and the outer diameter of the transmission gear (402) is 5 to 20 mm.

9. A high-speed 3D printer extrusion nozzle according to claim 1, characterized in that: The deceleration mechanism (3) is composed of a driving motor and a reducer, the output end of the driving motor is connected to the input end of the reducer, the output end of the reducer is fixedly connected to the transmission gear (402), and the reduction ratio of the driving motor and the reducer is 2:1 to 20:1.

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