Particle printer with cooling mechanism

Abstract

The invention provides a particle printer with a cooling mechanism. The particle printer comprises a rack, a vertical moving mechanism is installed in the rack, a printing platform is installed at the output end of the vertical moving mechanism, a horizontal moving mechanism is installed at the top of the rack, and a printing head is arranged on the horizontal moving mechanism; the first heat dissipation part is mounted outside the printing head and is used for cooling the lower part of the printing head; according to the particle printer with the cooling mechanism, through cooperation of the first heat dissipation part and the second heat dissipation part, graded temperature control of the printing head and a forming area is achieved, the problem of heat accumulation in the high-temperature particle printing process is effectively solved, the printing quality and the equipment stability are improved, and the printing efficiency is improved. And under the work of the guide part, the liquid supply part for supplying liquid to the second heat dissipation part is limited, the situation that a pipeline in the liquid supply part is wound when the printing head works is avoided, and normal printing is ensured.

Description

Technical Field

[0001] This invention relates to the field of printer technology, and more specifically, to a pellet printer with a cooling mechanism. Background Technology

[0002] In the process of granular 3D printing, the balance between high-temperature melt extrusion and molding cooling is a key factor affecting print quality. However, in existing printers, the screw extrusion mechanism can reach temperatures above 250°C during continuous operation. Traditional air-cooling solutions can only reduce the surface temperature by 15-20°C, which cannot solve the problem of heat accumulation in core components. Therefore, liquid cooling is usually added to improve the heat dissipation effect at the print head and avoid thermal runaway. However, when printing large sizes or multi-axis motion, the pipes of the liquid cooling mechanism move along the complex path with the print head. Under inertial operation, at high speeds, the inertia of the water pipes may cause spontaneous kinking, which will affect the normal delivery of coolant, affect the heat dissipation effect, and interfere with the movement of the print head, thus affecting the print quality of the product. Summary of the Invention

[0003] The purpose of this invention is to provide a pellet printer with a cooling mechanism to solve the above-mentioned problems.

[0004] To achieve the above objectives, embodiments of the present invention provide a granule printer with a cooling mechanism, comprising: a frame, a vertical moving mechanism installed within the frame, a printing platform installed at the output end of the vertical moving mechanism, a horizontal moving mechanism installed at the top of the frame, and a print head disposed on the horizontal moving mechanism; A first heat dissipation unit is installed on the outside of the print head and is used to cool the area below the print head. The second heat dissipation unit is disposed on the print head and is used to cool the print head and the first heat dissipation unit. A liquid supply unit is installed on the frame and connected to the second heat dissipation unit, used to circulate and deliver cooling water to the second heat dissipation unit. The guide part is installed on the horizontal moving mechanism and the liquid supply part, and is used to pull and tighten the liquid supply part; The printhead includes a body mounted on the horizontal moving mechanism, a screw extrusion mechanism mounted on the body, a feed box mounted on the outer wall of the screw extruder, a feed pipe with one end connected to the bottom of the feed box and the other end connected to the screw extruder, and an injection head mounted on the bottom of the screw extruder.

[0005] Furthermore, the first heat dissipation unit includes a protective cover fixed to the outside of the screw extrusion mechanism, a heat dissipation box obliquely installed outside the protective cover, heat dissipation grooves provided on the protective cover and the heat dissipation box, a heat dissipation fan installed inside the heat dissipation box, and an air outlet opened at the lower end of the heat dissipation box and corresponding to the lower end of the injection head.

[0006] Furthermore, the second heat dissipation part includes heat dissipation fins that are obliquely fixed to the outside of the protective cover and correspond to the heat dissipation box, heat dissipation pipes installed in the heat dissipation fins, spiral heat dissipation pipes sleeved on the screw extrusion mechanism, and drain pipes and inlet pipes that are respectively connected to the spiral heat dissipation pipes and the heat dissipation pipes. The inlet end of the spiral heat dissipation tube is connected to the outlet end of the heat dissipation coil.

[0007] Furthermore, the liquid supply unit includes a support base installed on the outer wall of the frame, a first linear motor fixed on the support base, an assembly plate fixed on the output end of the first linear motor, a cooling water tank fixed on the assembly plate, a water pump installed outside the cooling water tank, a water delivery pipe with one end connected to the water pump inlet and the other end extending to the bottom of the cooling water tank. The other end of the drain pipe is connected to the bottom of the cooling water tank, and the other end of the inlet pipe is connected to the drain end of the water pump.

[0008] Furthermore, the horizontal moving mechanism includes two second linear motors symmetrically mounted on the upper end of the frame, two translation stages respectively mounted on the output ends of the two second linear motors, and a third linear motor fixed on the two translation stages; The machine body is fixed to the output end of the third linear motor.

[0009] Furthermore, the guide section includes a connecting frame fixed to the body, a metal hose fixedly sleeved on the outside of the inlet pipe and the outlet pipe, a transmission frame with one end fixedly connected to the assembly plate and the other end fixedly connected to one of the translation stages, two control frames fixed to the transmission frame and one of the translation stages respectively, several guide wheels symmetrically rotatably mounted on the two control frames and abutting against the outer wall of the metal hose, and a take-up frame fixed to the outside of the cooling water tank; One end of the metal hose is fixedly connected to the connecting frame by a clamp.

[0010] Furthermore, the guide portion also includes two first guide rails respectively fixed on the support base and the frame, two first guide blocks respectively slidably mounted on the two first guide rails and fixed to the assembly plate and the transmission frame, a second guide rail fixed on the transmission frame, a second guide block slidably mounted on the second guide rail and fixed to the other end of the metal hose, an assembly rod fixed on the second guide block, and several counterweight rings movably sleeved on the assembly rod.

[0011] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: This granular printer with a cooling mechanism uses a first heat dissipation section to cool the printing area, and with the help of heat dissipation fins in the second heat dissipation section, it stably controls the temperature of the printing area below the print head, thereby ensuring the cooling speed of the printed material and reducing the probability of material shrinkage and warping. At the same time, as the cooling fan in the first heat dissipation section operates, it can remove a certain temperature of the coolant in the heat dissipation pipe, thus allowing the coolant entering the spiral heat dissipation pipe to be pre-cooled, effectively controlling the temperature at the print head, significantly reducing the operating temperature of the print head, avoiding material carbonization or sudden changes in fluidity caused by high temperature, reducing problems such as stringing and print head blockage, and preventing metal fatigue or aging of seals at the print head due to long-term overheating, thus reducing the frequency of maintenance. This pellet printer with a cooling mechanism provides a stable supply of coolant to the second heat dissipation unit through a liquid supply section. The cooling water tank in the liquid supply section can move horizontally in sync with the print head, preventing significant movement of the inlet and outlet pipes during lateral printing. During longitudinal printing, a guide section protects the inlet and outlet pipes with a flexible metal tube, preventing breakage due to frequent bending. Two control frames and several guide wheels restrict the lateral movement of the flexible metal tube. One end of the flexible metal tube is fixed to the print head's connecting frame, while the other end slides along a second guide rail via a second guide block. The second guide block, under the pressure of several cooperating blocks, stably pulls the other end of the flexible metal tube, ensuring that the inlet and outlet pipes maintain a natural curvature as the print head moves, minimizing swaying, reducing interference with print head movement, preventing disorderly swaying, ensuring continuous coolant delivery, and effectively extending pipe lifespan. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 A perspective view of the present invention is shown; Figure 2 A partial top perspective view of the present invention is shown; Figure 3A partial three-dimensional representation of the present invention is shown. Figure 1 ; Figure 4 A partial three-dimensional representation of the present invention is shown. Figure 2 ; Figure 5 A partial three-dimensional representation of the present invention is shown. Figure 3 ; Figure 6 This invention illustrates a partially split stereoscopic view. Figure 1 ; Figure 7 This invention illustrates a partially split stereoscopic view. Figure 2 .

[0014] In the picture 1. Frame; 2. Vertical moving mechanism; 3. Printing platform; 4. Horizontal moving mechanism; 5. Print head; 6. First heat dissipation unit; 7. Second heat dissipation unit; 8. Liquid supply unit; 9. Guide unit; 10. Machine body; 11. Screw extrusion mechanism; 12. Feed box; 13. Feed pipe; 14. Injection head; 15. Protective cover; 16. Heat dissipation box; 17. Heat dissipation groove; 18. Cooling fan; 19. Air outlet; 20. Heat dissipation fins; 21. Heat dissipation pipe; 22. Spiral heat dissipation pipe; 23. Drain pipe ; 24. Liquid inlet pipe; 25. Support base; 26. First linear motor; 27. Assembly plate; 28. Cooling water tank; 29. ​​Water pump; 30. Water delivery pipe; 31. Second linear motor; 32. Translation stage; 33. Third linear motor; 34. Connecting frame; 35. Metal flexible hose; 36. Transmission frame; 37. Positioning frame; 38. Guide wheel; 39. First guide rail; 40. First guide block; 41. Second guide rail; 42. Second guide block; 43. Assembly rod; 44. Counterweight ring; 45. Take-up frame. Detailed Implementation

[0015] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0016] like Figure 1-7 As shown, a pellet printer with a cooling mechanism includes: a frame 1, a vertical moving mechanism 2 installed inside the frame 1, a printing platform 3 installed at the output end of the vertical moving mechanism 2, a horizontal moving mechanism 4 installed on the top of the frame 1, and a print head 5 provided on the horizontal moving mechanism 4. The vertical moving mechanism 2 can be any existing mature structure that enables the printing platform 3 to complete stable vertical movement. The first heat dissipation part 6 is installed on the outside of the print head 5 and is used to cool the area below the print head 5. The second heat dissipation part 7 is disposed on the print head 5 and is used to cool the print head 5 and the first heat dissipation part 6. A liquid supply unit 8 is installed on the frame 1 and is connected to the second heat dissipation unit 7, and is used to circulate and transport cooling water to the second heat dissipation unit 7. Guide part 9, which is installed on the horizontal moving mechanism 4 and the liquid supply part 8, is used to pull and tighten the liquid supply part 8; The print head 5 includes a body 10 mounted on the horizontal moving mechanism 4, a screw extrusion mechanism 11 mounted inside the body 10, a feed box 12 mounted on the outer wall of the screw extruder, a feed pipe 13 with one end connected to the bottom of the feed box 12 and the other end connected to the screw extruder, and an injection head 14 mounted at the bottom of the screw extruder. In use, the horizontal moving mechanism 4, through the third linear motor 33 and the two second linear motors 31, drives the print head 5 to move horizontally and vertically. The vertical moving mechanism 2 adjusts the vertical height of the printing platform 3. At the same time, the granular material in the feed box 12 enters the screw extrusion mechanism 11 through the feed pipe 13, melts and is extruded through the injection head 14 to form the material in three dimensions. While printing, the cooling fan 18 in the first heat dissipation part 6 guides the airflow through the inclined air duct of the heat dissipation box 16 to the printing layer to accelerate the forming and curing. Simultaneously, airflow passes through the heat dissipation fins 20, assisting the coolant in dissipating heat and effectively controlling the temperature of the airflow blown out by the cooling fan 18, preventing the material from shrinking and warping due to excessive cooling. With the cooperation of the liquid supply unit 8, the coolant is pumped from the cooling water tank 28 into the heat dissipation pipes 21 via the water pump 29. Under the action of the heat dissipation fins 20 and the fan, it undergoes initial cooling. The pre-cooled liquid flows into the spiral heat dissipation pipes 22, wrapping around the screw extrusion mechanism 11 to absorb heat and maintain a constant temperature. The high-temperature coolant returns to the cooling water tank 28 via the drain pipe 23, completing a closed-loop cycle, thereby preventing high-temperature conduction. This reduces material carbonization or sudden changes in flowability, minimizing issues like wire pulling and clogging, and preventing metal fatigue or seal aging at the printhead 5 due to prolonged overheating, thus reducing maintenance frequency. When the printhead 5 moves for printing, the metal hose 35 in the guide section 9 protects the inlet pipe 24 and outlet pipe 23. Simultaneously, the cooperation of the two control frames 37 and several guide wheels 38 restricts the lateral movement of the metal hose 35. One end of the metal hose 35 is fixed to the connecting frame 34 of the printhead 5, and the other end travels along the second guide rail 4 via the second guide block 42. 1. Sliding, and the second guide block 42 is stably pulled by the gravity of several mating blocks to pull the other end of the metal hose 35, thereby ensuring that the liquid inlet pipe 24 and the liquid outlet pipe 23 maintain a natural curvature when moving with the print head 5, and are not prone to swaying. In addition, the cooling water tank 28 in the liquid supply section 8 will move in the same direction as the lateral movement of the print head 5, so that the metal hose 35 does not need to move laterally, thereby reducing interference with the movement of the print head 5, avoiding disorderly swaying, ensuring the continuity of coolant delivery, and effectively improving the service life of the pipe.

[0017] Optionally, the first heat dissipation part 6 includes a protective cover 15 fixed outside the screw extrusion mechanism 11, a heat dissipation box 16 obliquely installed outside the protective cover 15, a heat dissipation groove 17 provided on the protective cover 15 and the heat dissipation box 16, a heat dissipation fan 18 installed inside the heat dissipation box 16, and an air outlet 19 opened at the lower end of the heat dissipation box 16 and corresponding to the lower end of the injection head 14. When in use, the cooling fan 18 generates forced airflow, which enters the heat sink 16 through the heat sink 17. Since the heat sink 16 adopts an inclined design, the airflow is concentrated through the air outlet 19 and blown towards the printing area below the injection head 14, which quickly cools the printing layer, reduces material shrinkage and deformation, and improves dimensional stability and surface finish. The protective cover 15 and the heat sink 16 are provided with heat sinks 17, which can still dissipate heat through natural convection when the fan is not running, reducing heat accumulation.

[0018] Optionally, the second heat dissipation part 7 includes heat dissipation fins 20 that are obliquely fixed to the outside of the protective cover 15 and correspond to the heat dissipation box 16, heat dissipation pipes 21 installed in the heat dissipation fins 20, spiral heat dissipation pipes 22 sleeved on the screw extrusion mechanism 11, and drain pipes 23 and inlet pipes 24 that are respectively connected to the spiral heat dissipation pipes 22 and the heat dissipation pipes 21. The inlet end of the spiral heat sink 22 is connected to the outlet end of the heat sink 21. During use, the coolant is delivered to the heat sink 21 through the inlet pipe 24 and exchanges heat with the heat sink 20. This effectively adjusts and controls the temperature of the airflow through the cooling fan 18 in the first heat sink 6 and pre-cools the heat sink 20 in the airflow of the cooling fan 18, thereby effectively improving the heat dissipation effect of the first heat sink 6, ensuring the stability of the temperature field below the injection head 14, reducing material shrinkage stress, and preventing the printed layer from cooling too quickly, which could lead to cracking or warping. The spiral heat sink 22 is tightly wrapped around the outer wall of the screw extrusion mechanism 11 and directly absorbs the high-temperature heat generated by the screw extrusion mechanism 11 through the metal tube wall. As the low-temperature coolant flows from the inlet pipe 24 into the spiral heat sink 22 through the heat sink 21 and flows along the spiral path, the heat exchange time is ensured and the heat absorption efficiency is improved.

[0019] Optionally, the liquid supply unit 8 includes a support base 25 mounted on the outer wall of the frame 1, a first linear motor 26 fixed on the support base 25, an assembly plate 27 fixed on the output end of the first linear motor 26, a cooling water tank 28 fixed on the assembly plate 27, and a water pump 29 mounted outside the cooling water tank 28, with one end connected to the water inlet of the water pump 29 and the other end extending to the bottom of the cooling water tank 28 via a water delivery pipe 30. The other end of the drain pipe 23 is connected to the bottom of the cooling water tank 28, and the other end of the inlet pipe 24 is connected to the drain end of the water pump 29. The cooling water tank 28 stores coolant and is connected to the water pump 29 through the water supply pipe 30. When in use, the water pump 29 draws coolant from the cooling water tank 28, pumps it through the inlet pipe 24 into the cooling coils and spiral heat dissipation pipes 22 of the second heat dissipation section 7, and then discharges it into the cooling water tank 28 through the drain pipe 23, forming a closed loop. The water pump 29 maintains a constant flow rate to ensure that the coolant flows smoothly through the spiral heat dissipation pipes 22 and the heat dissipation pipes. The coolant flows uniformly in pipe 21 to avoid local overheating and to perform heat exchange circulation. The coolant in the cooling water tank 28 is cooled by an external heat dissipation device, such as a semiconductor cooling chip. While the horizontal moving mechanism 4 controls the movement of the print head 5, the first linear motor 26 drives the assembly plate 27 and the cooling water tank 28 to move horizontally in sync with the movement of the print head 5. This reduces the extension and retraction range of the inlet pipe 24 and the outlet pipe 23, reduces the required length of the inlet pipe 24 and the outlet pipe 23, and reduces the bending and tensile fatigue of the metal hose 35, thus extending the service life of the pipeline.

[0020] Optionally, the horizontal moving mechanism 4 includes two second linear motors 31 symmetrically mounted on the upper end of the frame 1, two translation stages 32 respectively mounted on the output ends of the two second linear motors 31, and a third linear motor 33 fixed on the two translation stages 32. The machine body 10 is fixed on the output end of the third linear motor 33. In use, the two second linear motors 31 drive the translation stage 32 to move along the X-axis, and the third linear motor 33 drives the print head 5 to move along the Y-axis, so as to achieve precise planar positioning of the print head 5. The combination of multiple linear motors reduces transmission errors and ensures printing accuracy.

[0021] Optionally, the guide part 9 includes a connecting frame 34 fixed to the body 10, a metal hose 35 fixedly sleeved on the outside of the liquid inlet pipe 24 and the liquid outlet pipe 23, a transmission frame 36 fixedly connected at one end to the assembly plate 27 and at the other end to one of the translation stages 32, two control frames 37 fixed on the transmission frame 36 and one of the translation stages 32 respectively, a plurality of guide wheels 38 symmetrically rotatably mounted on the two control frames 37 and abutting against the outer wall of the metal hose 35, and a take-up frame 45 fixed on the outside of the cooling water tank 28; One end of the metal hose 35 is fixedly connected to the connecting frame 34 by a clamp. The metal hose 35 effectively protects the inlet pipe 24 and the outlet pipe 23. Under the guidance of the two control frames 37 and several guide wheels 38, it reduces sliding friction, lowers movement resistance, makes the print head 5 move more smoothly, improves printing accuracy, and effectively extends the service life of the pipes, avoiding damage caused by frequent bending or friction. One end of the metal hose 35 is fixed to the connecting frame 34 by a clamp and moves synchronously with the print head 5. The other end is fixed to the second guide block 42 to tighten the metal hose 35, forming a flexible connection. Since one end of the transmission frame 36 is fixed to the translation stage 32 and the other end is fixed to the assembly plate 27, the cooling water tank 28 moves with the print head 5, reducing the expansion and contraction of the pipeline and ensuring that the coolant circulation is not affected by the movement of the print head 5. The cable tray 45 on the outside of the cooling water tank 28 is used to store excess pipeline and prevent messy tangling.

[0022] Optionally, the guide section 9 further includes two first guide rails 39 respectively fixed to the support base 25 and the frame 1, two first guide blocks 40 respectively slidably mounted on the two first guide rails 39 and fixed to the assembly plate 27 and the transmission frame 36, a second guide rail 41 fixed to the transmission frame 36, a second guide block 42 slidably mounted on the second guide rail 41 and fixed to the other end of the metal hose 35, an assembly rod 43 fixed to the second guide block 42, and several counterweight rings 44 movably sleeved on the assembly rod 43. In use, the two first guide blocks 40 move on the two first guide rails 39 respectively, guiding the movement of the assembly plate 27 and the transmission frame 36, ensuring that the cooling water tank 28 of the liquid supply section 8 and the transmission frame 36 remain stable when moving horizontally, and avoiding the cooling water tank 28 shaking or uneven force on the pipeline due to the movement of the print head 5, which could cause the print head to... 5. To ensure print quality, the second guide block 42 moves vertically on the second guide rail 41, restricting the movement trajectory of several counterweight rings 44. This ensures that the counterweight rings 44 can move vertically stably while moving horizontally in sync with the print head 5. During use, the counterweight rings 44 provide gravity balance, counteracting the inertial sway of the metal hose 35 during high-speed movement, reducing strain on the hose, and keeping the metal hose 35 taut at all times. This reduces bending, friction, and wear, improves durability, and prevents deformation or breakage after long-term use. At the same time, it guides the inlet pipe 24 and the outlet pipe 23, preventing them from swaying during use and interfering with the movement of the print head 5, ensuring the positioning accuracy of the print head 5 and ensuring print quality. In addition, since the counterweight rings 44 are movably mounted on the assembly rod 43, it is convenient to remove and change the counterweight weight to adapt to different printing speeds and strokes.

[0023] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A pellet printer with a cooling mechanism, characterized in that, include: A frame (1) is provided with a vertical moving mechanism (2) installed inside the frame (1), a printing platform (3) is installed at the output end of the vertical moving mechanism (2), a horizontal moving mechanism (4) is installed on the top of the frame (1), and a print head (5) is provided on the horizontal moving mechanism (4). The first heat dissipation part (6) is installed on the outside of the print head (5) and is used to cool the area below the print head (5); The second heat dissipation part (7) is disposed on the print head (5) and is used to cool the print head (5) and the first heat dissipation part (6); Liquid supply unit (8) is installed on the frame (1) and connected to the second heat dissipation unit (7) for circulating and transporting cooling water to the second heat dissipation unit (7); Guide section (9), which is installed on the horizontal moving mechanism (4) and the liquid supply section (8) for pulling and tightening the liquid supply section (8). The print head (5) includes a body (10) mounted on the horizontal moving mechanism (4), a screw extrusion mechanism (11) mounted inside the body (10), a feed box (12) mounted on the outer wall of the screw extruder, a feed pipe (13) with one end connected to the bottom of the feed box (12) and the other end connected to the screw extruder, and an injection head (14) mounted at the bottom of the screw extruder.

2. A pellet printer with a cooling mechanism as described in claim 1, characterized in that, The first heat dissipation part (6) includes a protective cover (15) fixed outside the screw extrusion mechanism (11), a heat dissipation box (16) installed obliquely outside the protective cover (15), a heat dissipation groove (17) provided on the protective cover (15) and the heat dissipation box (16), a heat dissipation fan (18) installed inside the heat dissipation box (16), and an air outlet (19) opened at the lower end of the heat dissipation box (16) and corresponding to the lower end of the injection head (14).

3. A pellet printer with a cooling mechanism as described in claim 2, characterized in that, The second heat dissipation part (7) includes heat dissipation fins (20) that are obliquely fixed outside the protective cover (15) and correspond to the heat dissipation box (16), heat dissipation pipes (21) installed inside the heat dissipation fins (20), spiral heat dissipation pipes (22) sleeved on the screw extrusion mechanism (11), and drain pipes (23) and inlet pipes (24) that are respectively connected to the spiral heat dissipation pipes (22) and the heat dissipation pipes (21). The liquid inlet of the spiral heat sink (22) is connected to the liquid outlet of the heat sink (21).

4. A pellet printer with a cooling mechanism as described in claim 3, characterized in that, The liquid supply unit (8) includes a support base (25) installed on the outer wall of the frame (1), a first linear motor (26) fixed on the support base (25), an assembly plate (27) fixed on the output end of the first linear motor (26), a cooling water tank (28) fixed on the assembly plate (27), a water pump (29) installed outside the cooling water tank (28), a water pipe (30) with one end connected to the water inlet end of the water pump (29) and the other end extending to the bottom of the cooling water tank (28); The other end of the drain pipe (23) is connected to the bottom of the cooling water tank (28), and the other end of the inlet pipe (24) is connected to the drain end of the water pump (29).

5. A pellet printer with a cooling mechanism as described in claim 4, characterized in that, The horizontal moving mechanism (4) includes two second linear motors (31) symmetrically mounted on the upper end of the frame (1), two translation stages (32) respectively mounted on the output ends of the two second linear motors (31), and a third linear motor (33) fixed on the two translation stages (32). The body (10) is fixed to the output end of the third linear motor (33).

6. A pellet printer with a cooling mechanism as described in claim 5, characterized in that, The guide part (9) includes a connecting frame (34) fixed to the body (10), a metal hose (35) fixedly sleeved on the outside of the liquid inlet pipe (24) and the liquid outlet pipe (23), a transmission frame (36) fixedly connected at one end to the assembly plate (27) and at the other end to one of the translation stages (32), two control frames (37) fixed on the transmission frame (36) and one of the translation stages (32) respectively, several guide wheels (38) symmetrically rotated and mounted on the two control frames (37) and abutting against the outer wall of the metal hose (35), and a take-up frame (45) fixed on the outside of the cooling water tank (28). One end of the metal hose (35) is fixedly connected to the connecting frame (34) by a clamp.

7. A pellet printer with a cooling mechanism as described in claim 6, characterized in that, The guide part (9) further includes two first guide rails (39) fixed on the support base (25) and the frame (1) respectively, two first guide blocks (40) slidably mounted on the two first guide rails (39) and fixed to the assembly plate (27) and the transmission frame (36) respectively, a second guide rail (41) fixed on the transmission frame (36), a second guide block (42) slidably mounted on the second guide rail (41) and fixed to the other end of the metal hose (35), an assembly rod (43) fixed on the second guide block (42), and several counterweight rings (44) movably sleeved on the assembly rod (43).

Images