Printing nozzle cooling device

Abstract

The utility model relates to the technical field of 3D printing equipment, in particular to a printing spray head cooling device, cold air is introduced into an air cooling heat dissipation cavity through a heat dissipation fan, meanwhile, water mist is injected into the air cooling heat dissipation cavity through a water cooling channel, heat on the surfaces of heat dissipation fins can be taken away, and meanwhile the heat dissipation area of a spray head body can be increased through the heat dissipation fins; the rotating sleeve, the baffle and the flow adjusting valve are arranged, the cold air flow and the water flow can be controlled easily, the heat dissipation intensity can be flexibly controlled according to the actual temperature condition of the spray head, different temperature changes can be adapted, the three modes of air cooling, water cooling and spray cooling are combined, cooling fins are matched, the heat dissipation efficiency is greatly improved, and the heat dissipation effect is good. And through combination of spray cooling and air cooling structures, the cooling effect is further enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printing equipment, in particular to a printing nozzle cooling device. Background Art

[0002] As one of the core components of a 3D printer, the printer nozzle largely determines the forming quality. The smoothness of the filament flowing out of the extrusion nozzle and the temperature of the filament extrusion directly affect the accuracy of 3D printing. During the use of a 3D printer, the temperature of the printing nozzle will gradually increase. If the temperature of the printer nozzle is too high, it will cause other components to dissolve and burn out, greatly affecting the printing effect.

[0003] The existing 3D printing nozzle assemblies mainly use fans for heat dissipation to prevent the printing material from melting and accumulating in the guide pipe and blocking the guide pipe, affecting the normal operation of the 3D printer. However, the heat dissipation method using fans is limited by the heat dissipation principle and structure, resulting in the heat dissipation temperature not being lower than the ambient temperature, and the heat dissipation effect is poor. Furthermore, the performance of the guide pipe and its internal materials is easily affected by the heating block.

[0004] Therefore, a printing nozzle cooling device with good heat dissipation effect is invented to solve the problems in the above background art. Summary of the Utility Model

[0005] To solve the problem that the existing 3D printing nozzle assemblies mainly use fans for heat dissipation, but the heat dissipation method using fans is limited by the heat dissipation principle and structure, resulting in the heat dissipation temperature not being lower than the ambient temperature, and the heat dissipation effect is poor. Furthermore, the performance of the guide pipe and its internal materials is easily affected by the heating block, a printing nozzle cooling device is invented.

[0006] The technical solution of the utility model includes a nozzle base, a nozzle body, and a movable mounting frame. Among them, the nozzle body is arranged at the bottom of the nozzle base, and the nozzle base is arranged on the movable mounting frame. It further includes:

[0007] An air-cooling heat dissipation cavity, which is arranged on the movable mounting frame. A heat dissipation fan is arranged at the top inside the air-cooling heat dissipation cavity. The top of the heat dissipation fan is communicated with the atmosphere, and the heat dissipation fan is fixed on the movable mounting frame;

[0008] A water storage cavity is arranged at the lower end of the movable mounting frame. A water-cooling channel is arranged at the lower end of the water storage cavity. A flow regulating valve is arranged on the water-cooling channel. The other end of the water-cooling channel is inserted into the air-cooling heat dissipation cavity and is provided with an atomizing nozzle;

[0009] A plurality of fine holes are provided at the lower end of the air-cooled heat dissipation cavity. An endothermic outer shell is provided on the outer side of the nozzle body. A plurality of heat dissipation fins are provided on the outer side of the endothermic outer shell. A circulation cavity is provided on the outer side of the heat dissipation fins. A collection cavity is provided at the bottom of the circulation cavity. A water-absorbing sponge is provided in the collection cavity.

[0010] Preferably, an air-cooling adjustment mechanism is further included. The air-cooling adjustment structure is arranged in the middle of the air-cooled heat dissipation cavity and includes a plurality of arc-shaped baffles that are slidably connected end to end. The plurality of baffles can be folded or unfolded, and when the plurality of baffles are completely folded, the air-cooled heat dissipation cavity can be opened, and when the plurality of baffles are completely unfolded, the air-cooled heat dissipation cavity is closed.

[0011] Preferably, an exhaust hole is opened at the upper end of the collection cavity, and a drain pipe is provided at the bottom of the collection cavity.

[0012] Preferably, the heat dissipation fins are arranged in a spiral shape.

[0013] Preferably, a rotating sleeve is provided on the outer side of the air-cooling adjustment mechanism, and an anti-slip portion is provided on the outer side of the rotating sleeve.

[0014] Compared with the prior art, the technical solution of the present utility model can achieve the following beneficial effects:

[0015] (1) A cooling fan, an air-cooled heat dissipation cavity, a water-cooled channel, and heat dissipation fins are provided. Cold air is introduced into the air-cooled heat dissipation cavity through the cooling fan, and at the same time, water mist is injected into the air-cooled heat dissipation cavity through the water-cooled channel, which is beneficial to taking away the heat on the surface of the heat dissipation fins. At the same time, the heat dissipation area of the nozzle body can be increased through the heat dissipation fins;

[0016] (2) A rotating sleeve, a baffle, and a flow regulating valve are provided, which is beneficial to controlling the cold air flow and water flow, and can flexibly control the heat dissipation intensity according to the actual temperature of the nozzle, adapting to different temperature changes;

[0017] (3) It combines three cooling methods: air cooling, water cooling, and spray cooling, and is combined with heat dissipation fins, greatly improving the heat dissipation efficiency. Through the combination of spray cooling and air cooling structures, the cooling effect is further enhanced;

[0018] The technical solution of the present utility model has a wide application prospect in the technical field of 3D printing equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an axonometric view of the present utility model.

[0020] Figure 2 It is a perspective view of the present utility model.

[0021] Figure 3 It is a front view of the present utility model.

[0022] Figure 4 This is the full sectional front view of the present utility model.

[0023] Figure 5 This is the enlarged view of the heat sink of the present utility model.

[0024] Wherein, 1. Sprinkler base, 2. Sprinkler body, 3. Movable mounting bracket, 4. Air-cooled heat dissipation cavity, 5. Heat dissipation fan, 6. Water storage cavity, 7. Water-cooled channel, 8. Flow regulating valve, 9. Atomizing nozzle, 10. Fine holes, 11. Heat-absorbing outer shell, 12. Heat sink, 13. Flow-through cavity, 14. Collection cavity, 15. Water-absorbing sponge, 16. Baffle, 17. Exhaust hole, 18. Drain pipe, 19. Rotating sleeve, 20. Anti-slip part. Specific embodiments

[0025] The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope protected by the present utility model. In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0026] In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0027] As Figures 1 to 5The shown printing nozzle cooling device includes a nozzle base 1, a nozzle body 2, and a movable mounting bracket 3. The nozzle body 2 is fixedly connected to the bottom of the nozzle base 1, the nozzle base 1 is fixed on the movable mounting bracket 3, and the movable mounting bracket 3 is mounted on the transmission device of the printer. By connecting the nozzle base 1 and the nozzle body 2, the precise movement and positioning of the nozzle body 2 can be achieved. Specifically, in one embodiment, it further includes: an air-cooled heat dissipation cavity 4. In this embodiment, the air-cooled heat dissipation cavity 4 is fixedly connected to the lower end of the movable mounting bracket 3. The upper side of the air-cooled heat dissipation cavity 4 is cylindrical, and the lower end is square-tubular. A heat dissipation fan 5 is fixedly connected to the top inside the air-cooled heat dissipation cavity 4. The top of the heat dissipation fan 5 is in communication with the atmosphere, and the heat dissipation fan 5 is fixed on the movable mounting bracket 3. The heat dissipation fan 5 introduces external air into the air-cooled heat dissipation cavity 4; a water storage cavity 6 is fixedly connected to the lower end of the movable mounting bracket 3. The water storage cavity 6 is used to store cooling water. The drainage end of the water storage cavity 6 is fixedly connected to a water-cooled channel 7. Specifically, a water pump is also fixedly connected at the drainage end of the water storage cavity 6. The output end of the water pump is connected to the water-cooled channel 7. A flow regulating valve 8 is fixedly connected to the water-cooled channel 7 to facilitate controlling the water flow rate through the water-cooled channel 7. The other end of the water-cooled channel 7 is inserted into the air-cooled heat dissipation cavity 4 and fixedly connected to an atomizing nozzle 9, and fine cooling water droplets are sprayed out through the atomizing nozzle 9; a plurality of fine holes 10 are opened at the lower end of the air-cooled heat dissipation cavity 4. An endothermic outer shell 11 is fixedly connected to the outside of the nozzle body 2. A plurality of heat dissipation fins 12 are fixedly connected to the outside of the endothermic outer shell 11. A circulation cavity 13 is fixedly connected to the outside of the heat dissipation fins 12. The upper end of the circulation cavity 13 is in communication with the air-cooled heat dissipation cavity 4 through the fine holes 10, and the cooling water is introduced into the circulation cavity 13 through the fine holes 10. The bottom of the circulation cavity 13 is fixedly connected to a collection cavity 14;

[0028] In this embodiment, when the nozzle body 2 starts to work and heat up, the cooling device is activated. On the one hand, the cold air in the air-cooled heat dissipation cavity 4 is driven by the fan to blow towards the heat dissipation fins 12. The cold air contacts the surface of the heat dissipation fins 12 at a certain flow rate and angle, quickly taking away the heat on the heat dissipation fins 12. Since the heat dissipation fins 12 are closely attached to the nozzle body 2, the heat generated by the nozzle can be efficiently conducted to the heat dissipation fins 12, and the cold air continuously flows through the heat dissipation fins 12, forming a continuous heat exchange process; on the other hand, the atomizing nozzle 9 sprays out fine cooling water droplets near the heat dissipation fins 12. These droplets suspend in the air and gradually approach the heat dissipation fins 12. When the droplets contact the surface of the heat dissipation fins 12, due to the relatively high temperature of the heat dissipation fins 12, the droplets quickly evaporate. During the evaporation process, the droplets absorb a large amount of heat, further reducing the temperature of the heat dissipation fins 12; the cold air and the water mist cooperate with each other on the heat dissipation fins 12 to play a synergistic cooling role. The cold air mainly takes away heat through convective heat transfer, while the water mist enhances the cooling effect by evaporative heat absorption.

[0029] As Figures 1 to 5The shown printing nozzle cooling device, in a specific embodiment, further includes an air-cooling adjustment mechanism. The air-cooling adjustment structure is arranged in the middle of the air-cooling heat dissipation cavity 4 and includes a plurality of arc-shaped baffles 16 that are slidably connected end to end. The baffles 16 can be folded or unfolded. When the plurality of baffles 16 are folded, the air-cooling heat dissipation cavity 4 can be opened, and when the plurality of baffles 16 are unfolded, the air-cooling heat dissipation cavity 4 is closed. The plurality of baffles 16 are sequentially slidably connected end to end and the baffles 16 are arranged in a ring shape and can rotate around the nozzle body 2 as the axis. A rotating sleeve 19 is arranged outside the air-cooling adjustment mechanism. The rotating sleeve 19 is rotatably installed outside the air-cooling heat dissipation cavity 4. Specifically, the first baffle 16 is fixed in the air-cooling heat dissipation cavity 4, and the last baffle 16 is fixedly connected to the rotating sleeve 19. The rotating sleeve 19 is coaxially arranged with the nozzle body 2. When the rotating sleeve 19 rotates, it drives the last baffle 16 to rotate. At this time, the last baffle 16 slides relative to the baffle 16 connected to it. At this time, the flow area in the air-cooling heat dissipation cavity 4 can be adjusted, thereby completing the adjustment of the air intake volume of the cold air.

[0030] As Figures 1 to 5 For the shown printing nozzle cooling device, in a specific embodiment, a water-absorbing sponge 15 is fixedly connected in the collection cavity 14. An exhaust hole 17 is opened at the upper end of the collection cavity 14, and a drain pipe 18 is fixedly connected to the bottom of the collection cavity 14. The water-absorbing sponge 15 is arranged in a ring shape and is staggered in the collection cavity 14. The water vapor entering the collection cavity 14 is absorbed after contacting the water-absorbing sponge 15, and flows to the bottom of the collection cavity 14 as the water content increases and can be discharged from the drain pipe 18, while the air is discharged upward.

[0031] As Figures 1 to 5 For the shown printing nozzle cooling device, in a specific embodiment, the heat sink 12 is formed in a spiral shape, and a plurality of spiral heat sinks 12 are arranged in a circular array on the heat absorption outer shell 11, which is beneficial to the full contact with the cold air and water vapor and increases the cooling effect.

[0032] As Figures 1 to 5 For the shown printing nozzle cooling device, in a specific embodiment, an anti-slip portion 20 is opened on the outer side of the rotating sleeve 19 to facilitate the rotation of the rotating sleeve 19.

[0033] The working principle of this device has been described through the above embodiments. The above embodiments only represent several implementation manners of the present invention, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. Printing nozzle cooling device, comprising a nozzle base (1), a nozzle body (2), and a movable mounting bracket (3), characterized in that, The nozzle body (2) is arranged at the bottom of the nozzle base (1), and the nozzle base (1) is arranged on the movable mounting frame (3). It further includes: An air-cooled heat dissipation cavity (4) is arranged on the movable mounting frame (3). A heat dissipation fan (5) is arranged at the top inside the air-cooled heat dissipation cavity (4). The top of the heat dissipation fan (5) communicates with the atmosphere, and the heat dissipation fan (5) is fixed on the movable mounting frame (3); A water storage cavity (6) is arranged at the lower end of the movable mounting frame (3). A water-cooled channel (7) is arranged at the lower end of the water storage cavity (6). A flow regulating valve (8) is arranged on the water-cooled channel (7). The other end of the water-cooled channel (7) is inserted into the air-cooled heat dissipation cavity (4) and is provided with an atomizing nozzle (9); A plurality of fine holes (10) are arranged at the lower end of the air-cooled heat dissipation cavity (4). An endothermic outer shell (11) is arranged on the outer side of the nozzle body (2). A plurality of heat dissipation fins (12) are arranged on the outer side of the endothermic outer shell (11). A circulation cavity (13) is arranged on the outer side of the heat dissipation fins (12). A collection cavity (14) is arranged at the bottom of the circulation cavity (13). A water-absorbing sponge (15) is arranged in the collection cavity (14).

2. The printing nozzle cooling device according to claim 1, wherein, It further includes an air-cooling adjustment mechanism which is arranged in the middle inside the air-cooled heat dissipation cavity (4) and includes a plurality of arc-shaped baffles (16) that are slidably connected end to end. The plurality of baffles (16) can be folded or unfolded, and when the plurality of baffles (16) are completely folded, they can open the air-cooled heat dissipation cavity (4), and when the plurality of baffles (16) are completely unfolded, they can close the air-cooled heat dissipation cavity (4).

3. The printing nozzle cooling device according to claim 1, wherein, An exhaust hole (17) is opened at the upper end of the collection cavity (14), and a drain pipe (18) is arranged at the bottom of the collection cavity (14).

4. The printing nozzle cooling device according to claim 1, characterized in that, The heat dissipation fins (12) are arranged in a spiral shape.

5. The printing nozzle cooling device according to claim 1, characterized in that, A rotating sleeve (19) is arranged on the outer side of the air-cooling adjustment mechanism, and an anti-slip portion (20) is opened on the outer side of the rotating sleeve (19).

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