3D printer capable of cooling printing nozzle

Abstract

The invention relates to the technical field of 3D printing, in particular to a 3D printer capable of cooling a printing nozzle, which comprises a horizontal moving mechanism, the horizontal moving mechanism comprises a horizontal moving frame, deflection moving frames are symmetrically arranged at one end of the horizontal moving frame, and one end of each deflection moving frame is rotatably connected with the horizontal moving frame through a driving rotating shaft; and driving guide wheels are rotationally arranged at the other ends of the deflection moving frames. The device further comprises a mixed material guiding mechanism, a synchronous feeding mechanism and a heat insulation cooling mechanism. According to the 3D printer, through structural optimization, multiple links such as consumable conveying, heating melting, uniform mixing, spray head cooling and movement guiding are improved, and the operation stability, printing precision and material adaptability of the 3D printer are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of 3D printing technology, and in particular to a 3D printer capable of cooling the print head. Background Technology

[0002] In recent years, with the popularization of fused deposition modeling (FDM) technology, 3D printers have been widely used in prototyping, small-batch production, and personalized customization. However, with the increasing demands for printing precision and the diversification of printing materials, existing 3D printing equipment has exposed many technical bottlenecks during long-term continuous operation and multi-material printing, mainly in terms of nozzle heat dissipation, material compatibility, and motion stability.

[0003] First, heat conduction control is one of the core factors restricting print quality and feed stability. During FDM printing, the printhead heating element typically needs to maintain a temperature above 200°C to melt the filament. Heat is conducted upwards along the metal throat to the feed channel. When heat accumulates and the throat temperature exceeds the glass transition temperature of the filament, the filament softens and deforms before entering the melting zone, resulting in "thermal breakage." Softened filament is prone to curling or clogging under the pressure of the extrusion gears, leading to increased feed resistance, fluctuating extrusion volume, and in severe cases, print failure. Current technologies mostly employ passive cooling methods with heat sinks and fans, but their heat dissipation efficiency is limited and they cannot effectively block the heat transfer path, especially in large-size printing or printing high-temperature engineering materials, where thermal blockage is more pronounced.

[0004] Secondly, with the development of multi-material composite printing technology, a single printhead can hardly meet the needs of simultaneous or alternating feeding of multiple consumables. Existing multi-material printing solutions often employ multi-printhead switching or multi-path feeding gate structures, but these often suffer from problems such as complex structures, time-consuming switching, and color mixing contamination caused by material residue. Furthermore, if the friction between the feed guide rollers and the consumables is insufficient or the pressure is unstable during the feeding process, slippage and material breakage can easily occur, affecting the continuity and reliability of multi-material printing. How to simplify the structure and improve feeding efficiency while ensuring stable feeding of multiple materials has become a pressing technical problem to be solved in this field.

[0005] Furthermore, the uniform mixing and temperature control of the molten material directly affect the mechanical properties and surface quality of the printed parts. Traditional printheads often use a single heating chamber with a conical flow channel structure. After the filament melts, it relies on the extrusion pressure to flow naturally, lacking an active stirring mechanism. This results in uneven mixing of additives, masterbatches, or different materials in the molten state, leading to insufficient interlayer bonding strength. At the same time, the heat from the heating chamber is easily dissipated, which not only increases energy consumption but also causes large fluctuations in the melting temperature, affecting printing consistency.

[0006] Furthermore, the printhead's movement and positioning mechanism is equally crucial for ensuring printing accuracy. Existing gantry or cantilever structures are prone to vibration and sway during high-speed movement, leading to decreased printhead positioning accuracy and affecting the forming effect of complex curved surfaces and delicate structures. Optimizing the guiding method of the printhead travel mechanism to ensure its stability during long-term operation is also a key direction for improving equipment reliability.

[0007] The present invention aims to solve the technical problems existing in the prior art. To this end, a 3D printer with a cooling printhead is proposed. Summary of the Invention

[0008] The purpose of this invention is to provide a 3D printer that can cool the print head, so as to solve the technical problems existing in the prior art.

[0009] By adopting the above technical solution, the present invention has the following beneficial effects: The present invention provides a 3D printer capable of cooling the printhead, comprising a horizontal moving mechanism, wherein the horizontal moving mechanism includes a horizontal moving frame, and a deflecting moving frame symmetrically arranged at one end of the horizontal moving frame. One end of the deflecting moving frame is rotatably connected to the horizontal moving frame via a drive shaft. The other end of the deflecting moving frame is rotatably provided with a drive guide wheel. The invention also includes: a mixing and guiding mechanism, a synchronous feeding mechanism, and a heat insulation and cooling mechanism; a double-column directional guide cylinder is horizontally arranged at the other end of the horizontal moving frame, and a double-column guide rod is arranged in cooperation with the double-column directional guide cylinder.

[0010] As a further aspect of the present invention: the mixing and guiding mechanism includes a working installation cylinder, a fixed installation cylinder is provided on the outer side of the working installation cylinder, a cylindrical vacuum cavity is provided inside the cylinder wall of the fixed installation cylinder, and one side of the horizontal moving frame is connected to the fixed installation cylinder through a synchronous installation frame; As a further embodiment of the present invention: the mixing and guiding mechanism further includes a feeding installation cylinder provided at one end of the working installation cylinder, an extrusion installation cylinder provided at the other end of the working installation cylinder, and a conical nozzle provided at the outer end of the extrusion installation cylinder; As a further embodiment of the present invention: an output drive component is provided at the outer end of the feeding installation cylinder, and a plurality of fixed mounting brackets are provided at equal angles on the outer side of the output drive component. The outer ends of the fixed mounting brackets are all fixed to the outer side of the feeding installation cylinder. A limit rotating column is provided at one end of the output drive component through the output shaft. A limit rotating sleeve is provided at the end of the feeding installation cylinder in conjunction with the limit rotating column. A heating transmission column is connected to the outer end of the limit rotating column. The heating transmission column passes through the feeding installation cylinder, the working installation cylinder, and the extrusion installation cylinder. A heating column is embedded inside the heating transmission column. As a further aspect of the present invention: a rotational coupling conductive ring is provided on the outer side of the limiting rotating column, and an annular conductive groove is provided on the inner side of the limiting rotating sleeve in conjunction with the rotational coupling conductive ring; As a further embodiment of the present invention: a spiral guide plate is provided on the heating transmission column inside the feeding installation cylinder; a plurality of rotating stirring columns are provided at equal angles on the heating transmission column inside the working installation cylinder; a plurality of fixed stirring columns are provided on the inner wall of the working installation cylinder in coordination with the rotating stirring columns; and a spiral extrusion plate is provided on the heating transmission column inside the extrusion installation cylinder. As a further aspect of the present invention: the synchronous feeding mechanism includes an annular feeding cylinder provided on the feeding mounting cylinder, and a plurality of consumable guiding modules are provided at equal angles on the annular feeding cylinder; As a further aspect of the present invention: the consumable material guiding module includes a feeding conduit, one end of which is connected to an annular feeding cylinder, and the other end of which is provided with an expanding feeding conduit. The outer ends of the expanding feeding conduit are each provided with a conveying conduit, and the outer ends of the conveying conduits are symmetrically provided with conveying mounting frames. A reset shaft is rotatably provided on the conveying mounting frame, and a swing wheel frame is provided on the reset shaft. Each swing wheel frame is provided with a conveying guide wheel, and the outer side of the conveying guide wheel is provided with several anti-slip patterns at equal angles. As a further embodiment of the present invention: the heat insulation and cooling mechanism includes a reduced diameter guide pipe connected in series on the feed conduit, and a variable diameter guide cylinder covered with the reduced diameter guide pipe. One end of the variable diameter guide cylinder is provided with an annular air collecting hood, which abuts against the expanded guide pipe. An arc-shaped guide hood is provided on the outer side of the annular air collecting hood. The other end of the output drive component is provided with a flow concentrator through a fixed mounting column. The arc-shaped guide hoods are all connected to the flow concentrator through an exhaust duct. As a further aspect of the present invention: an air pump is connected to the flow-collecting cylinder, and an exhaust pipe is connected to one end of the air pump; As a further embodiment of the present invention: a plurality of bent heat-conducting sheets are provided at equal angles on the outer side of the reduced diameter feed tube, one end of the bent heat-conducting sheet is connected to the outer side of the feed conduit near the annular feed cylinder, and a heat insulation ring is provided on the outer side of the feed conduit away from the annular feed cylinder, and one end of the bent heat-conducting sheet is connected to the heat insulation ring.

[0011] Compared with the prior art, the beneficial effects of the present invention are: 1. Highly efficient heat insulation and cooling ensure smooth material feeding: Through a unique heat-insulating cooling mechanism design, the problem of premature softening of consumables due to upward heat conduction is effectively solved. Specifically, a reduced-diameter feed tube shortens the heat transfer path, and bent heat-conducting fins disperse and guide heat into the variable-diameter guide cylinder. Simultaneously, an active exhaust cooling system is formed with components such as an air pump and a concentrator to promptly dissipate heat. This not only prevents consumables from curling or melting due to heat but also ensures the continuity and stability of the feeding process.

[0012] 2. Uniform mixing and heating mechanism improves print quality: The mixing and feeding mechanism integrates heating, stirring, and extrusion functions. The heating drive column has a built-in heating element that, during rotation, achieves uniform melting and mixing of the filament through feeding via a spiral guide plate, staggered stirring between the rotating and fixed stirring columns, and extrusion via a spiral extrusion plate. Combined with the cylindrical vacuum chamber within the fixed mounting cylinder, this effectively reduces heat loss, ensuring a constant melting temperature and thus improving the uniformity and strength of the 3D printed product.

[0013] 3. Stable synchronous feeding structure, adaptable to multi-material printing: By incorporating multiple consumable feeding modules, the equipment can accommodate simultaneous or selective feeding of various materials. The feeding guide rollers at the end of the feeding conduit, in conjunction with the reset shaft and swing wheel frame, ensure that the feeding guide rollers remain in close contact with the consumables. Anti-slip textures on the guide rollers guarantee a continuous, stable, and non-slip feeding process, providing a reliable feeding foundation for multi-material composite printing.

[0014] 4. Flexible drive and displacement enhance motion stability: The horizontal moving mechanism employs a design that combines a drive shaft with a deflection moving frame, enabling the drive guide wheel to actively engage with the double-column guide rod. Guided by the double-column directional guide tube and the double-column guide rod, the horizontal moving frame achieves smooth movement and displacement, ensuring the accuracy and stability of the print head during spatial movement. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of a 3D printer that can cool the print head.

[0017] Figure 2 This is a three-dimensional structural diagram of a horizontal moving mechanism in a 3D printer that can cool the print head.

[0018] Figure 3 This is a schematic diagram of a three-dimensional structure of a 3D printer that can cool the printhead by removing the double-column guide rod.

[0019] Figure 4 This is a partial cross-sectional schematic diagram of the mixing and feeding mechanism of a 3D printer with a printhead cooling capability.

[0020] Figure 5 for Figure 4Partial cross-sectional view of the exterior of the mixing and feeding mechanism.

[0021] Figure 6 for Figure 5 Enlarged view of point a in the middle.

[0022] Figure 7 for Figure 4 A three-dimensional schematic diagram of the interior of the mixing and guiding mechanism.

[0023] Figure 8 This is a partial cross-sectional schematic diagram of a filament feeding module in a 3D printer that can cool the printhead.

[0024] Figure 9 for Figure 8 Enlarged view of point b in the middle.

[0025] Figure 10 This is a partial cross-sectional schematic diagram of a heat insulation and cooling mechanism in a 3D printer that can cool the print head.

[0026] Figure 11 for Figure 10 A magnified view of point c in the middle.

[0027] 1-Horizontal moving frame, 2-Double-column directional guide cylinder, 3-Double-column guide rod, 4-Drive shaft, 5-Deflection moving frame, 6-Drive guide wheel, 7-Synchronous mounting frame, 8-Fixed mounting cylinder, 9-Extrusion mounting cylinder, 10-Working mounting cylinder, 11-Feeding mounting cylinder, 12-Variable diameter guide cylinder, 13-Conveying conduit, 14-Output drive component, 15-Fixed mounting frame, 16-Concentrating cylinder, 17-Air pump, 18-Exhaust pipe, 19-Feeding conduit, 20-Annular feeding cylinder, 21-Fixed mounting column, 22-Exhaust duct, 23-Annular collector 24-Limiting rotating column, 25-Heating transmission column, 26-Conical nozzle, 27-Spiral guide plate, 28-Rotating stirring column, 29-Cylindrical vacuum chamber, 30-Fixed stirring column, 31-Spiral extrusion plate, 32-Limiting rotating sleeve, 33-Annular conductive groove, 34-Rotating coupling conductive ring, 35-Bent heat-conducting sheet, 36-Heat insulation ring, 37-Reduced diameter guide pipe, 38-Expanded guide pipe, 39-Material conveying mounting frame, 40-Reset rotating shaft, 41-Swing wheel frame, 42-Material conveying guide wheel, 43-Anti-slip texture, 44-Arc-shaped guide shroud. Detailed Implementation

[0028] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0029] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0030] Example 1, please refer to Figures 1-2 In this embodiment of the invention, a 3D printer capable of cooling the printhead includes a horizontal moving mechanism. The horizontal moving mechanism includes a horizontal moving frame 1, with a deflecting moving frame 5 symmetrically arranged at one end of the horizontal moving frame 1. One end of the deflecting moving frame 5 is rotatably connected to the horizontal moving frame 1 via a drive shaft 4. The other end of each deflecting moving frame 5 is rotatably provided with a drive guide wheel 6. The printer also includes a mixing and guiding mechanism, a synchronous feeding mechanism, and a heat insulation and cooling mechanism. A double-column directional guide cylinder 2 is horizontally arranged at the other end of the horizontal moving frame 1, and a double-column guide rod 3 is arranged in conjunction with the double-column directional guide cylinder 2.

[0031] By combining the horizontal moving mechanism with the externally installed moving frame, the mixing and guiding mechanism, the synchronous feeding mechanism, and the heat insulation and cooling mechanism can move synchronously in the three-dimensional space, ensuring the progress of 3D printing. Specifically, the corresponding type of 3D printing material is selected and inserted into the synchronous feeding mechanism. The synchronous feeding mechanism guides the material into the mixing and guiding mechanism. The 3D printing operation is carried out by guiding, heating and melting, mixing and stirring, and extrusion of the 3D printing material in conjunction with spatial movement. During the 3D printing process, the heat on the mixing and guiding mechanism is dissipated and blocked by the heat insulation and cooling mechanism to prevent the filament from softening prematurely due to heat, which would cause the filament to curl up and be unable to enter the mixing and guiding mechanism normally. Under the action of the drive shaft 4, the deflection moving frame 5 deflects toward the double column guide rod 3, so that the drive guide wheel 6 on the deflection moving frame 5 abuts against the double column guide rod 3. Under the rolling drive of the drive guide wheel 6, and with the cooperation of the double column directional guide cylinder 2 and the double column guide rod 3, the horizontal moving frame 1 moves and changes position stably.

[0032] Example 2, based on Example 1, please refer to... Figures 3-7 In this embodiment of the invention, the mixing and guiding mechanism includes a working installation cylinder 10, a fixed installation cylinder 8 is provided on the outer side of the working installation cylinder 10, a cylindrical vacuum cavity 29 is provided inside the cylinder wall of the fixed installation cylinder 8, and one side of the horizontal moving frame 1 is connected to the fixed installation cylinder 8 through a synchronous installation frame 7. The mixing and guiding mechanism also includes a feeding installation cylinder 11 at one end of the working installation cylinder 10, an extrusion installation cylinder 9 at the other end of the working installation cylinder 10, and a conical nozzle 26 at the outer end of the extrusion installation cylinder 9. The outer end of the feeding installation cylinder 11 is directly opposite the output drive component 14. Several fixed mounting brackets 15 are provided at equal angles on the outer side of the output drive component 14. The outer ends of the fixed mounting brackets 15 are all fixed to the outer side of the feeding installation cylinder 11. One end of the output drive component 14 is provided with a limiting rotating column 24 through the output shaft. The end of the feeding installation cylinder 11 is provided with a limiting rotating sleeve 32 in cooperation with the limiting rotating column 24. The outer end of the limiting rotating column 24 is connected to a heating transmission column 25. The heating transmission column 25 passes through the feeding installation cylinder 11, the working installation cylinder 10 and the extrusion installation cylinder 9. A heating column is embedded inside the heating transmission column 25. A rotation coupling conductive ring 34 is provided on the outer side of the limiting rotating column 24. An annular conductive groove 33 is provided on the inner side of the limiting rotating sleeve 32 in cooperation with the rotation coupling conductive ring 34. A spiral guide plate 27 is provided on the heating transmission column 25 inside the feeding installation cylinder 11. A plurality of rotating stirring columns 28 are provided at equal angles on the heating transmission column 25 inside the working installation cylinder 10. A plurality of fixed stirring columns 30 are provided on the inner wall of the working installation cylinder 10 in coordination with the rotating stirring columns 28. A spiral extrusion plate 31 is provided on the heating transmission column 25 inside the extrusion installation cylinder 9.

[0033] The output drive unit 14 is started, and with the cooperation of the limiting rotating sleeve 32, the limiting rotating column 24 and the heating transmission column 25 rotate stably. At this time, the rotating coupling conductive ring 34 rotates in conjunction with the annular conductive groove 33 to realize rotating coupling power supply and ensure that the heating column in the heating transmission column 25 continues to heat up. While the heating drive column 25 rotates, the spiral guide plate 27 rotates synchronously, capturing the consumables introduced into the feeding installation cylinder 11, and guiding the material downward as the spiral guide plate 27 rotates. The consumables introduced into the working installation cylinder 10 by the spiral guide plate 27 are initially softened or melted. The rotating stirring column 28 rotates with the heating transmission column 25, and the heat on the heating transmission column 25 is transferred to the rotating stirring column 28. With the staggered rotation and stirring of the rotating stirring column 28 and the fixed stirring column 30, the consumables are uniformly melted and mixed while being guided downward. Since the cylindrical vacuum chamber 29 is provided in the cylinder wall of the fixed installation cylinder 8, the temperature of the consumables in the working installation cylinder 10 can be stably increased, reducing the heat loss. The spiral extrusion plate 31 also rotates synchronously with the heating transmission column, continuing to discharge the melted and uniformly mixed consumables downwards and maintaining a flowing state until the consumables are discharged from the conical nozzle 26. With the change of spatial position, 3D feeding operation is carried out.

[0034] Example 3, based on Example 1, please refer to... Figures 8-11 In this embodiment of the invention, the synchronous feeding mechanism includes an annular feeding cylinder 20 provided on the feeding mounting cylinder 11, and a plurality of consumable guiding modules are provided on the annular feeding cylinder 20 at equal angles. The consumable material guiding module includes a feeding conduit 19, one end of which is connected to an annular feeding cylinder 20. The other end of the feeding conduit 19 is provided with an expanding feeding conduit 38. The outer ends of the expanding feeding conduit 38 are all provided with feeding conduits 13. The outer ends of the feeding conduits 13 are symmetrically provided with feeding mounting frames 39. A reset shaft 40 is rotatably provided on the feeding mounting frame 39. A swing wheel frame 41 is provided on the reset shaft 40. Feeding guide wheels 42 are provided on the swing wheel frame 41. Several anti-slip textures 43 are provided at equal angles on the outer side of the feeding guide wheels 42. The external consumable is inserted between the two feeding guide rollers 42, and under the action of the feeding guide rollers 42, the consumable is continuously introduced into the feeding conduit 13. Under the action of the reset rotating shaft 40, the feeding guide rollers 42 on the swing wheel frame 41 on both sides are always connected to the consumable, ensuring that the consumable feeding process is continuous and stable. Consumables are introduced into the feeding conduit 13 and then sequentially introduced into the feeding installation cylinder 11 through the feeding conduit 19 and the annular feeding cylinder 20. The heat insulation and cooling mechanism includes a reduced diameter guide pipe 37 connected in series on the feed conduit 19, and a variable diameter guide cylinder 12 covering the reduced diameter guide pipe 37. One end of the variable diameter guide cylinder 12 is provided with an annular air collecting hood 23, which abuts against the expanded guide pipe 38. An arc-shaped guide hood 44 is provided on the outer side of the annular air collecting hood 23. The other end of the output drive component 14 is provided with a flow concentrator 16 through a fixed mounting column 21. The arc-shaped guide hood 44 is connected to the flow concentrator 16 through an exhaust duct 22. An air pump 17 is connected to the flow concentrator 16, and an exhaust pipe 18 is connected to one end of the air pump 17. A plurality of bent heat-conducting plates 35 are provided at equal angles on the outer side of the reduced diameter feed tube 37. One end of the bent heat-conducting plate 35 is connected to the outer side of the feed conduit 19 near the annular feed cylinder 20. A heat insulation ring 36 is provided on the outer side of the feed conduit 19 away from the annular feed cylinder 20. One end of the bent heat-conducting plate 35 is connected to the heat insulation ring 36.

[0035] Because the temperature is high during the operation of the mixing and feeding mechanism, the consumables in the synchronous feeding mechanism will soften, curl or melt through heat conduction, reducing the feeding efficiency. The heat transfer is reduced by the reduced diameter guide tubes 37 connected in series on the feed conduit 19. The heat on the feed conduit 19 near the annular feed cylinder 20 is dispersed in time by the bent heat-conducting plate 35, further reducing the heat transfer of the reduced diameter guide tube 37. At the same time, the heat insulation ring 36 blocks most of the heat on the bent heat-conducting plate 35. Simultaneously, the air pump 17 is started to draw air from the concentrator 16 into the exhaust pipe 18. The exhaust pipe 18 is connected to the externally installed exhaust extension pipe. Air is introduced from one end of the variable diameter guide tube 12. The air flowing through the bent heat-conducting fin 35 is guided along the inner side of the variable diameter guide tube 12, and then enters the annular air collecting hood 23. It then flows into the concentrator 16 through the arc-shaped guide hood 44 and the exhaust duct 22, thus timely removing heat from the device and reducing the total amount of heat transferred.

[0036] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0037] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A 3D printer capable of cooling the printhead, comprising a horizontal moving mechanism, the horizontal moving mechanism comprising a horizontal moving frame, with deflecting moving frames symmetrically arranged at one end of the horizontal moving frame, one end of the deflecting moving frame being rotatably connected to the horizontal moving frame via a drive shaft, and the other end of each deflecting moving frame being rotatably provided with a drive guide wheel, characterized in that, Also includes: A mixing and guiding mechanism includes a working installation cylinder, a fixed installation cylinder is provided on the outside of the working installation cylinder, a cylindrical vacuum cavity is provided inside the cylinder wall of the fixed installation cylinder, and one side of the horizontal moving frame is connected to the fixed installation cylinder through a synchronous installation frame. The mixing and guiding mechanism also includes a feeding installation cylinder at one end of the working installation cylinder, an extrusion installation cylinder at the other end of the working installation cylinder, and a conical nozzle at the outer end of the extrusion installation cylinder; The synchronous feeding mechanism includes an annular feeding cylinder mounted on a feeding mounting cylinder, and several sets of consumable guiding modules are arranged at equal angles on the annular feeding cylinder. The consumable guiding module includes a feeding guide tube. The heat insulation and cooling mechanism includes a reduced-diameter guide pipe connected in series on the feed conduit, and a variable-diameter guide tube is provided to cover the reduced-diameter guide pipe.

2. A 3D printer capable of cooling the printhead according to claim 1, characterized in that, An output drive component is positioned directly opposite the outer end of the feeding installation cylinder. Several fixed mounting brackets are arranged at equal angles on the outer side of the output drive component. The outer ends of the fixed mounting brackets are all fixed to the outer side of the feeding installation cylinder. A limit rotating column is provided at one end of the output drive component through the output shaft. A limit rotating sleeve is provided at the end of the feeding installation cylinder in conjunction with the limit rotating column. A heating transmission column is connected to the outer end of the limit rotating column. The heating transmission column passes through the feeding installation cylinder, the working installation cylinder, and the extrusion installation cylinder. A heating column is embedded inside the heating transmission column.

3. A 3D printer capable of cooling the printhead according to claim 2, characterized in that, A rotational coupling conductive ring is provided on the outer side of the limiting rotating column, and an annular conductive groove is provided on the inner side of the limiting rotating sleeve in conjunction with the rotational coupling conductive ring.

4. A 3D printer capable of cooling the printhead according to claim 3, characterized in that, A spiral guide plate is provided on the heating transmission column inside the feeding installation cylinder. Several rotating stirring columns are provided at equal angles on the heating transmission column inside the working installation cylinder. Several fixed stirring columns are provided on the inner wall of the working installation cylinder in coordination with the rotating stirring columns. A spiral extrusion plate is provided on the heating transmission column inside the extrusion installation cylinder.

5. A 3D printer capable of cooling the printhead according to claim 1, characterized in that, One end of the feed conduit is connected to the annular feed cylinder, and the other end of the feed conduit is provided with an expansion guide pipe, and the outer end of the expansion guide pipe is provided with a conveying conduit.

6. A 3D printer capable of cooling the printhead according to claim 5, characterized in that, The outer end of the material conveying conduit is symmetrically provided with a material conveying mounting frame. A reset shaft is rotatably provided on the material conveying mounting frame. A swing wheel frame is provided on the reset shaft. Each swing wheel frame is provided with a material conveying guide wheel. Several anti-slip patterns are provided at equal angles on the outer side of the material conveying guide wheel.

7. A 3D printer capable of cooling the printhead according to claim 1, characterized in that, One end of the variable diameter guide tube is provided with an annular air collecting hood, which abuts against the expanding guide tube. An arc-shaped guide hood is provided on the outside of the annular air collecting hood. The other end of the output drive component is provided with a flow concentrator through a fixed mounting column. The arc-shaped guide hood is connected to the flow concentrator through an exhaust duct.

8. A 3D printer with a printhead cooling capability according to claim 7, characterized in that, An air pump is connected to the flow collector, and an exhaust pipe is connected to one end of the air pump.

9. A 3D printer capable of cooling the printhead according to claim 8, characterized in that, Several bent heat-conducting sheets are arranged at equal angles on the outer side of the reduced diameter feed tube. One end of the bent heat-conducting sheet is connected to the outer side of the feed conduit near the annular feed cylinder. A heat insulation ring is arranged on the outer side of the feed conduit away from the annular feed cylinder. One end of the bent heat-conducting sheet is connected to the heat insulation ring.

10. A 3D printer with a printhead cooling capability according to claim 1, characterized in that, The other end of the horizontally moving frame is equipped with a double-column directional guide tube, and a double-column guide rod is provided in conjunction with the double-column directional guide tube.

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