Heat dissipation mechanism for 3D printer nozzle

Abstract

The invention relates to the technical field of spray head heat dissipation, and particularly discloses a spray head heat dissipation mechanism for a 3D printer, the spray head heat dissipation mechanism comprises a spray head part, the spray head part comprises a heat dissipation box and a heat dissipation block, a liquid cooling mechanism is installed in the heat dissipation box, and a flow guide mechanism is arranged in the liquid cooling mechanism; and a water tank and a micro pump are arranged outside the heat dissipation box. Through mutual cooperation of the liquid cooling mechanism, the flow guide mechanism, the water tank and the micro pump, the heat dissipation block can be completely immersed in the cooling liquid, and then the cooling liquid flows downwards in a continuous spiral mode and then flows upwards in a spiral mode after reaching the outer side of the heat insulation cylinder; therefore, the cooling liquid is more sufficiently in contact with the heat dissipation block and the cooling cylinder, the overall heat dissipation effect is improved in cooperation with the heat dissipation fan outside the heat dissipation box, and in addition, installation and maintenance can be facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of nozzle heat dissipation, and in particular relates to a nozzle heat dissipation mechanism for a 3D printer. Background Art

[0002] A 3D printer is a device that can "print" a real 3D object. It uses the working principle of layered processing and superposition forming to convert the 3D model in the computer into a physical object. This type of printer is widely used in design fields, such as industrial design, digital product mold opening, etc., which greatly shortens the product development cycle; the 3D printer nozzle is one of its core technologies, responsible for depositing materials on the building platform in a specific way. The nozzle melts or liquefies the material through heating or mechanical means and then extrude it to form a three-dimensional object stacked layer by layer. The nozzle has good temperature control capabilities to meet the printing needs of different materials. Its type and material compatibility directly affect the quality and production efficiency of the printout; the 3D printer nozzle is usually composed of a heat dissipation aluminum block, a throat, a heating block and a nozzle. In order to prevent the temperature from being too high and causing the raw material to melt before reaching the nozzle, and causing blockage, a cooling fan is usually installed outside the heat dissipation aluminum block.

[0003] The existing nozzle cooling mechanism used in 3D printers basically adopts air cooling or water cooling to dissipate the heat dissipation aluminum block. The heat dissipation efficiency of air cooling is usually lower than that of water cooling, and water cooling requires a heat pipe to surround the periphery of the heat dissipation aluminum block, thus limiting the heat dissipation efficiency. Summary of the invention

[0004] The purpose of the present invention is to provide a heat dissipation mechanism for a 3D printer nozzle to solve the problems existing in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A heat dissipation mechanism for a nozzle of a 3D printer with a flow guide mechanism, comprising a nozzle component, the nozzle component comprising a heat dissipation box and a heat dissipation block, a liquid cooling mechanism installed inside the heat dissipation box, a flow guide mechanism arranged inside the liquid cooling mechanism, a water tank and a micro pump arranged outside the heat dissipation box; the liquid cooling mechanism comprises two symmetrical cooling cylinders and two upper and lower symmetrical sealing rings, the cooling cylinders are used to receive the flow guide mechanism and the coolant; the flow guide mechanism comprises a heat insulation cylinder, an inner flow guide component and an outer flow guide component, the inner flow guide component The flow assembly includes an inlet guide plate 1 and an inlet guide plate 2, and the outer guide assembly includes an outlet guide plate 1 and an outlet guide plate 2. An inner guide channel 1 is formed between the inlet guide plate 1 and the inlet guide plate 2, an inner guide channel 2 is formed between the inlet guide plate 2 and the inlet guide plate 1, an outer guide channel 2 is formed between the outlet guide plate 1 and the outlet guide plate 2, and an outer guide channel 1 is formed between the outlet guide plate 2 and the outlet guide plate 1; the guide mechanism cooperates with a water tank and a micro pump to spirally guide the coolant on both sides of the inner and outer sides of the insulation cylinder.

[0007] Preferably: the inner flow guide component is located on the inner side of the insulation tube, the outer flow guide component is located on the outer side of the insulation tube, the upper and lower ends of the insulation tube are in contact with the inner wall of the cooling cylinder, and the inner flow guide component is sleeved on the periphery of the heat dissipation block.

[0008] Preferably: the upper port of the inner guide channel one is connected to a liquid inlet head one, the lower port of the inner guide channel one is connected to a liquid outlet head one, the upper port of the inner guide channel two is connected to a liquid inlet head two, the lower port of the inner guide channel two is connected to a liquid outlet head two, the liquid inlet head one, liquid outlet head one, liquid inlet head two and liquid outlet head two are all fixedly connected to the inlet guide plate one and the inlet guide plate two, and the peripheries of the liquid inlet head one, the inlet guide plate one, the liquid outlet head one, the liquid inlet head two, the inlet guide plate two and the liquid outlet head two are all in contact with the inner side of the insulation cylinder.

[0009] Preferably: the lower port of the outer guide channel one is connected to a connector one, the upper port of the outer guide channel one is connected to a drainage head one, the lower port of the outer guide channel two is connected to a connector two, the upper port of the outer guide channel two is connected to a drainage head two, and the inner sides of the connector one, the outlet guide plate one, the drainage head one, the connector two, the outlet guide plate two and the drainage head two all fit the outer periphery of the insulation tube.

[0010] Preferably: the outside of the connector 1 and the connector 2 are both provided with connecting pipes, the connector 1 is connected to the liquid outlet head 1 through the connecting pipe, the connector 2 is connected to the liquid outlet head 2 through the connecting pipe, and the liquid outlet head 2 and the liquid outlet head 1 are both connected to the water tank through a hose.

[0011] Preferably: the liquid inlet head 1, liquid outlet head 1, liquid outlet head 2, liquid inlet head 2, connecting head 1, liquid discharge head 1, connecting head 2 and liquid discharge head 2 are all composed of a blocking block and a connecting pipe, wherein the connecting pipe runs through the blocking block.

[0012] Preferably: the two cooling cylinders are connected to each other by bolts, the periphery of the cooling cylinders are provided with heat dissipation fins, the sides of the two cooling cylinders close to each other are fixedly connected with a mounting plate, the mounting plate is provided with evenly distributed through holes, and the sealing ring is located between the two cooling cylinders.

[0013] Preferably: the water tank is installed on both sides of the heat dissipation box, the micro pump is installed above the water tank, the input end of the micro pump is connected to the water tank, and the output end of the micro pump is connected to the liquid inlet head 1 and the liquid inlet head 2 through a hose.

[0014] Preferably, a throat is inserted into the heat dissipation block, a heating aluminum block is installed at the bottom of the throat, a nozzle is installed at the bottom of the heating aluminum block, and a heat dissipation fan is installed at one side of the heat dissipation box.

[0015] Preferably, the sealing ring is sleeved on the periphery of the throat.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The liquid cooling mechanism, the flow guiding mechanism, the water tank and the micro pump provided in the present invention cooperate with each other, so that the heat sink block can be completely immersed in the coolant, so that the coolant and the heat sink block can exchange heat, and the coolant after the heat exchange will be guided to the outside of the insulation cylinder so that the cooling cylinder can exchange heat with the coolant for the second time, and the heat absorbed by the cooling cylinder will be dissipated again through the external heat dissipation fan, thereby forming multi-layer heat dissipation and improving the total heat dissipation.

[0018] 2. The present invention cooperates with each other through the provision of a liquid cooling mechanism, a flow guide mechanism, a water tank and a micro pump, so that after the heat sink block is completely immersed in the coolant, the coolant can flow downward in a continuous spiral manner and then flow upward in a spiral manner after reaching the outside of the insulation cylinder, thereby allowing the coolant to more fully contact the heat sink block and the cooling cylinder, thereby increasing the overall heat dissipation effect.

[0019] 3. The liquid cooling mechanism, guide mechanism, water tank and micro pump provided in the present invention cooperate with each other. During installation, the sealing ring, the inner guide assembly, the heat insulation cylinder and the outer guide assembly can be sequentially sleeved from the inside to the outside, and then the cooling cylinder can be installed. This makes installation easy and has a certain degree of adaptability, thereby increasing the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 One of the three-dimensional diagrams of the present invention as a whole;

[0021] Figure 2 is a side cross-sectional view of the nozzle component of the present invention;

[0022] Figure 3It is a side cross-sectional view of the liquid cooling mechanism and the flow guiding mechanism of the present invention;

[0023] Figure 4 It is a schematic diagram of the internal three-dimensional structure of the liquid cooling mechanism and the flow guiding mechanism of the present invention;

[0024] Figure 5 It is a structural schematic diagram of the nozzle component and the liquid cooling mechanism of the present invention;

[0025] Figure 6 It is a top view of the flow guiding mechanism of the present invention;

[0026] Figure 7 It is a structural schematic diagram of the inner flow guide component of the present invention;

[0027] Figure 8 It is a schematic structural diagram of the external flow guide assembly of the present invention.

[0028] In the figure:

[0029] 1. Nozzle components; 11. Heat sink; 12. Throat; 13. Heating aluminum block; 14. Nozzle; 15. Heat sink; 16. Cooling fan;

[0030] 2. Liquid cooling mechanism; 21. Cooling cylinder; 22. Heat dissipation fins; 23. Mounting plate; 24. Through hole; 25. Sealing ring;

[0031] 3. flow guide mechanism; 31. heat insulation tube; 32. connecting pipe;

[0032] 33. Inner guide assembly; 331. Liquid inlet head 1; 332. Liquid inlet guide plate 1; 333. Liquid outlet head 1; 334. Liquid inlet head 2; 335. Liquid inlet guide plate 2; 336. Liquid outlet head 2;

[0033] 34, external flow guide assembly; 341, connector 1; 342, outlet guide plate 1; 343, drain head 1; 344, connector 2; 345, outlet guide plate 2; 346, drain head 2;

[0034] 35. Inner flow guide channel 1; 36. Inner flow guide channel 2; 37. Outer flow guide channel 1; 38. Outer flow guide channel 2;

[0035] 4. Water tank; 5. Micro pump. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] Reference Figure 1-Figure 8 As shown, the present invention provides a heat dissipation mechanism for a nozzle of a 3D printer with a flow guiding mechanism, comprising a nozzle component 1, the nozzle component 1 comprising a heat dissipation box 15 and a heat dissipation block 11, a liquid cooling mechanism 2 is installed inside the heat dissipation box 15, a flow guiding mechanism 3 is arranged inside the liquid cooling mechanism 2, and a water tank 4 and a micro pump 5 are arranged outside the heat dissipation box 15;

[0038] The liquid cooling mechanism 2 includes two symmetrical cooling cylinders 21 and two upper and lower symmetrical sealing rings 25. The cooling cylinders 21 are used to receive the flow guide mechanism 3 and the cooling liquid.

[0039] The flow guide mechanism 3 includes a heat insulation tube 31, an inner flow guide assembly 33 and an outer flow guide assembly 34. The inner flow guide assembly 33 includes an inlet flow guide plate 1 332 and an inlet flow guide plate 2 335. The outer flow guide assembly 34 includes an outlet flow guide plate 1 342 and an outlet flow guide plate 2 345. An inner flow guide channel 1 35 is formed between the inlet flow guide plate 1 332 and the inlet flow guide plate 2 335. An inner flow guide channel 2 36 is formed between the inlet flow guide plate 2 335 and the inlet flow guide plate 1 332. An outer flow guide channel 2 38 is formed between the outlet flow guide plate 1 342 and the outlet flow guide plate 2 345. An outer flow guide channel 1 37 is formed between the outlet flow guide plate 2 345 and the outlet flow guide plate 1 342.

[0040] The flow guiding mechanism 3 cooperates with the water tank 4 and the micro pump 5 to spirally guide the coolant on both sides of the heat insulation cylinder 31;

[0041] The inner flow guide component 33 is located on the inner side of the insulation tube 31 , and the outer flow guide component 34 is located on the outer side of the insulation tube 31 . The upper and lower ends of the insulation tube 31 are attached to the inner wall of the cooling cylinder 21 , and the inner flow guide component 33 is sleeved on the outer periphery of the heat dissipation block 11 .

[0042] Reference Figure 4-Figure 8 In a further embodiment, the upper port of the inner guide channel 1 35 is connected to a liquid inlet head 1 331, the lower port of the inner guide channel 1 35 is connected to a liquid outlet head 1 333, the upper port of the inner guide channel 2 36 is connected to a liquid inlet head 2 334, the lower port of the inner guide channel 2 36 is connected to a liquid outlet head 2 336, the liquid inlet head 1 331, the liquid outlet head 1 333, the liquid inlet head 2 334 and the liquid outlet head 2 336 are all fixedly connected to the inlet guide plate 1 332 and the inlet guide plate 2 335, and the peripheries of the liquid inlet head 1 331, the inlet guide plate 1 332, the liquid outlet head 1 333, the liquid inlet head 2 334, the inlet guide plate 2 335 and the liquid outlet head 2 336 are all in contact with the inner side of the insulation tube 31.

[0043] In this embodiment, the inlet guide plate 1 332, the inlet guide plate 2 335, the outlet guide plate 1 342 and the outlet guide plate 2 345 are all spiral-shaped, but the inlet guide plate 1 332 and the inlet guide plate 2 335 are staggered, and the outlet guide plate 1 342 and the outlet guide plate 2 345 are staggered, and the gaps between them constitute the inner guide channel 1 35, the inner guide channel 2 36, the outer guide channel 1 37 and the outer guide channel 2 38; the insulation tube 31 serves as a partition and can also be used for temperature insulation so that the coolant will not transfer heat to the inner guide channel 1 35 and the inner guide channel 2 36 when passing through the inner guide channel 1 37 and the outer guide channel 2 38. The coolant flows through the inner guide channel 1 35 and the inner guide channel 1 35 to the outer guide channel 1 37 and the outer guide channel 2 38.

[0044] The upper port of the outer guide channel 1 37 is connected to a drain head 1 343, the lower port of the outer guide channel 2 38 is connected to a connector 2 344, the upper port of the outer guide channel 2 38 is connected to a drain head 2 346, the inner sides of connector 1 341, outlet guide plate 1 342, drain head 1 343, connector 2 344, outlet guide plate 2 345 and drain head 2 346 are all in contact with the outer periphery of the insulation tube 31, the outsides of connector 1 341 and connector 2 344 are both provided with connecting pipes 32, connector 1 341 is connected to outlet head 1 333 through the connecting pipe 32, connector 2 344 is connected to outlet head 2 336 through the connecting pipe 32, and drain head 2 346 and drain head 1 343 are both connected to the water tank 4 through a hose.

[0045] In this embodiment, when the coolant fills the interior of the cooling cylinder 21, as the coolant circulates, the inner guide channel 1 35 and the inner guide channel 2 36 will continuously spirally guide the internal coolant downward, and then the outer guide channel 1 37 and the outer guide channel 2 38 will continuously spirally guide the coolant upward to guide the coolant back to the interior of the water tank 4. In this process, the coolant outside the heat sink 11 will be better connected with the heat sink 11, and the coolant flowing in the outer guide channel 1 37 and the outer guide channel 2 38 will be better in contact with the inner wall of the cooling cylinder 21.

[0046] The liquid inlet head 331, the liquid outlet head 333, the liquid outlet head 336, the liquid inlet head 334, the connecting head 341, the liquid discharge head 343, the connecting head 344 and the liquid discharge head 346 are all composed of a blocking block and a connecting pipe, wherein the connecting pipe runs through the blocking block.

[0047] In this embodiment, the connecting pipe is L-shaped as a whole. When used for the first time, the operation of the micro pump 5 will inject the coolant into the interior of the cooling cylinder 21 through the liquid inlet head 1 331 and the liquid inlet head 2 334, until the coolant can be discharged from the liquid discharge head 1 343 and the liquid discharge head 2 346 and re-enter the interior of the water tank 4, forming a coolant circulation;

[0048] The two cooling cylinders 21 are connected to each other by bolts. Heat dissipation fins 22 are provided on the periphery of the cooling cylinders 21. A mounting plate 23 is fixedly connected to one side of the two cooling cylinders 21 that are close to each other. The mounting plate 23 is provided with evenly distributed through holes 24. A sealing ring 25 is located between the two cooling cylinders 21.

[0049] In this embodiment, the cooling cylinder 21, the heat dissipation fins 22 and the mounting plate 23 are integrated, wherein the through hole 24 is used to avoid blocking the flow of airflow inside the heat dissipation box 15; the sealing ring 25 ensures that the coolant cannot overflow when the heat dissipation block 11 is located inside the cooling cylinder 21, thereby ensuring the sealing performance. In addition, there are sealing rings at the upper and lower ends of the heat insulation cylinder 31;

[0050] After the cooling cylinder 21 is filled with coolant, the micro pump 5 continues to operate to allow the coolant in the water tank 4 to continuously flow from the liquid inlet head 1 331 and the liquid inlet head 2 334 into the cooling cylinder 21 and to be re-discharged from the liquid discharge head 1 343 and the liquid discharge head 2 346 into the water tank 4. In this process, the coolant entering from the liquid inlet head 1 331 will flow in the inner guide channel 1 35 formed between the inlet guide plate 1 332 and the inlet guide plate 2 335, and enter the outlet head 331. 33, and the coolant entering from the second liquid inlet head 334 will flow in the second internal guide channel 36 formed between the second inlet guide plate 335 and the first inlet guide plate 332, and enter the second liquid outlet head 336, so that the coolant located on the inner side of the heat insulation cylinder 31 flows downward in a spiral manner to generate turbulence, so that the heat dissipation block 11 located on the inner side of the heat insulation cylinder 31 can have a more sufficient contact surface, thereby improving the heat exchange efficiency, and also allowing the coolant to be distributed outside the heat dissipation block 11 The cooling liquid in the outlet head 1 333 and the outlet head 2 336 will enter the interior of the connector 1 341 and the connector 2 344 through the connecting pipe 32, and will be ejected from the other port of the connector 1 341 and the inlet head 2 334. The cooling liquid ejected from the connector 1 341 will flow inside the outer guide channel 2 38, and reach the outlet head 1 343, and the cooling liquid ejected from the inlet head 2 334 will be ejected from the outlet head 1 333. The coolant will flow inside the outer guide channel 37 and reach the drain head 346; the drain head 343 and the drain head 346 are connected to the external water tank 4 through a hose, so that the coolant that has been in contact with the heat sink 11 will be reintroduced into the interior of the water tank 4 for cooling. Since the outer guide component 34 is located on the outer periphery of the insulation tube 31 and the inner side of the cooling cylinder 21, this part of the coolant will transfer part of the heat to the cooling cylinder 21, and then transfer it to the outside from the cooling cylinder 21.

[0051] Reference Figure 1-Figure 5In a further embodiment, the water tank 4 is installed on both sides of the heat dissipation box 15, the micro pump 5 is installed above the water tank 4, the input end of the micro pump 5 is connected to the water tank 4, and the output end of the micro pump 5 is connected to the liquid inlet head 1 331 and the liquid inlet head 2 334 through a hose.

[0052] In this embodiment, the heat sink 11, the throat 12, the heating aluminum block 13, the nozzle 14, the heat sink 15 and the heat sink fan 16 constitute the nozzle mechanism of the existing 3D printer.

[0053] A throat 12 is inserted into the heat sink 11 , a heating aluminum block 13 is installed at the bottom of the throat 12 , a nozzle 14 is installed at the bottom of the heating aluminum block 13 , a heat sink fan 16 is installed on one side of the heat sink 15 , and a sealing ring 25 is sleeved on the periphery of the throat 12 .

[0054] In this embodiment, when the external micro pump 5 operates, the coolant inside the water tank 4 enters the liquid inlet head 1 331 and the liquid inlet head 2 334 from the output end of the micro pump 5, and fills the interior of the cooling cylinder 21 with the coolant, and then re-enters the interior of the water tank 4 from the liquid discharge head 1 343 and the liquid discharge head 2 346, and the cooling fan 16 outside the heat dissipation box 15 is started. At this time, the heat generated by the 3D printer heat dissipation block 11 will be directly absorbed by the coolant inside the cooling cylinder 21, and the cooling cylinder 21 will dissipate the heat to the outside through the heat dissipation fins 22, and after the operation of the heat dissipation fan 16, the heat is taken away by the airflow for heat dissipation, thereby improving the heat dissipation efficiency.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A heat dissipation mechanism for a nozzle of a 3D printer, comprising a nozzle component (1), characterized in that: The nozzle component (1) comprises a heat sink (15) and a heat sink block (11); a liquid cooling mechanism (2) is installed inside the heat sink (15); a flow guide mechanism (3) is arranged inside the liquid cooling mechanism (2); and a water tank (4) and a micro pump (5) are arranged outside the heat sink (15); The liquid cooling mechanism (2) comprises two symmetrical cooling cylinders (21) and two upper and lower symmetrical sealing rings (25), and the cooling cylinders (21) are used to receive the flow guide mechanism (3) and the cooling liquid; The flow guide mechanism (3) comprises a heat insulation tube (31), an inner flow guide assembly (33) and an outer flow guide assembly (34); the inner flow guide assembly (33) comprises an inlet flow guide plate 1 (332) and an inlet flow guide plate 2 (335); the outer flow guide assembly (34) comprises an outlet flow guide plate 1 (342) and an outlet flow guide plate 2 (345); an inner flow guide channel 1 (35) is formed between the inlet flow guide plate 1 (332) and the inlet flow guide plate 2 (335); an inner flow guide channel 2 (36) is formed between the inlet flow guide plate 2 (335) and the inlet flow guide plate 1 (332); an outer flow guide channel 2 (38) is formed between the outlet flow guide plate 1 (342) and the outlet flow guide plate 2 (345); and an outer flow guide channel 1 (37) is formed between the outlet flow guide plate 2 (345) and the outlet flow guide plate 1 (342); The flow guiding mechanism (3) cooperates with the water tank (4) and the micro pump (5) to spirally guide the cooling liquid on both sides of the inner and outer sides of the heat insulation cylinder (31).

2. A heat dissipation mechanism for a 3D printer nozzle according to claim 1, characterized in that: The inner flow guide component (33) is located on the inner side of the insulation tube (31), and the outer flow guide component (34) is located on the outer side of the insulation tube (31). The upper and lower ends of the insulation tube (31) are in contact with the inner wall of the cooling cylinder (21), and the inner flow guide component (33) is sleeved on the outer periphery of the heat dissipation block (11).

3. A heat dissipation mechanism for a 3D printer nozzle according to claim 1, characterized in that: The upper port of the inner flow guide channel 1 (35) is connected to a liquid inlet head 1 (331), the lower port of the inner flow guide channel 1 (35) is connected to a liquid outlet head 1 (333), the upper port of the inner flow guide channel 2 (36) is connected to a liquid inlet head 2 (334), the lower port of the inner flow guide channel 2 (36) is connected to a liquid outlet head 2 (336), the liquid inlet head 1 (331), the liquid outlet head 1 (333), the liquid inlet head 2 (334) and the liquid outlet head 2 (336) are all fixedly connected to the inlet guide plate 1 (332) and the inlet guide plate 2 (335), and the peripheries of the liquid inlet head 1 (331), the inlet guide plate 1 (332), the liquid outlet head 1 (333), the liquid inlet head 2 (334), the inlet guide plate 2 (335) and the liquid outlet head 2 (336) are all in contact with the inner side of the heat insulation cylinder (31).

4. A heat dissipation mechanism for a nozzle of a 3D printer according to claim 1, characterized in that: The lower port of the outer flow guide channel 1 (37) is connected to a connector 1 (341), the upper port of the outer flow guide channel 1 (37) is connected to a drainage head 1 (343), the lower port of the outer flow guide channel 2 (38) is connected to a connector 2 (344), the upper port of the outer flow guide channel 2 (38) is connected to a drainage head 2 (346), and the inner sides of the connector 1 (341), the outlet guide plate 1 (342), the drainage head 1 (343), the connector 2 (344), the outlet guide plate 2 (345) and the drainage head 2 (346) are all in contact with the outer periphery of the thermal insulation tube (31).

5. A heat dissipation mechanism for a nozzle of a 3D printer according to claim 4, characterized in that: The outside of the first connector (341) and the second connector (344) are both provided with a connecting pipe (32); the first connector (341) is connected to the first liquid outlet head (333) via the connecting pipe (32); the second connector (344) is connected to the second liquid outlet head (336) via the connecting pipe (32); and the second liquid outlet head (346) and the first liquid outlet head (343) are both connected to the water tank (4) via a hose.

6. A heat dissipation mechanism for a 3D printer nozzle for a flow guide mechanism (3) according to claim 3, characterized in that: The liquid inlet head 1 (331), liquid outlet head 1 (333), liquid outlet head 2 (336), liquid inlet head 2 (334), connecting head 1 (341), liquid discharge head 1 (343), connecting head 2 (344) and liquid discharge head 2 (346) are all composed of a blocking block and a connecting pipe, wherein the connecting pipe runs through the blocking block.

7. A heat dissipation mechanism for a 3D printer nozzle according to claim 1, characterized in that: The two cooling cylinders (21) are connected to each other by bolts, and the outer periphery of the cooling cylinders (21) is provided with heat dissipation fins (22). The sides of the two cooling cylinders (21) close to each other are fixedly connected with a mounting plate (23), and the mounting plate (23) is provided with evenly distributed through holes (24). The sealing ring (25) is located between the two cooling cylinders (21).

8. A heat dissipation mechanism for a nozzle of a 3D printer according to claim 1, characterized in that: The water tank (4) is installed on both sides of the heat dissipation box (15), and the micro pump (5) is installed above the water tank (4). The input end of the micro pump (5) is connected to the water tank (4), and the output end of the micro pump (5) is connected to the liquid inlet head 1 (331) and the liquid inlet head 2 (334) through a hose.

9. A heat dissipation mechanism for a nozzle of a 3D printer according to claim 1, characterized in that: A throat (12) is inserted into the interior of the heat dissipation block (11), a heating aluminum block (13) is installed at the bottom of the throat (12), a nozzle (14) is installed at the bottom of the heating aluminum block (13), and a heat dissipation fan (16) is installed on one side of the heat dissipation box (15).

10. A heat dissipation mechanism for a nozzle of a 3D printer according to claim 1, characterized in that: The sealing ring (25) is sleeved on the outer periphery of the throat pipe (12).

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