3D printer nozzle cooling structure

Abstract

The utility model discloses a 3D printer nozzle cooling structure, and relates to the technical field of 3D printing. The cooling structure comprises a heating block. The heating block comprises a main block and a movable block. The main block is provided with a penetrable threaded hole, a heating mounting hole, a temperature measuring mounting hole and a slot. And the heating mounting hole and the temperature measuring mounting hole are respectively formed in two sides of the threaded hole. And the slot is arranged between the heating mounting hole and the temperature measuring mounting hole. The slot and the threaded hole are adjacent but not communicated. And the movable block is movably inserted into the slot. When the nozzle needs to be heated, the movable block is plugged in the slot and used for conducting heat transfer on the nozzle; when heat dissipation is needed, the movable block is pulled out, the inserting groove is exposed, the wall thickness of the main block wrapping the nozzle is obviously reduced, the heat dissipation speed of the nozzle can be increased, a fan can be used for blowing towards the inserting groove, and heat dissipation of the nozzle is accelerated. The section, not inserted into the threaded hole, of the nozzle is exposed in the air, heat dissipation is fast, the slot and the exposed nozzle can be blown by the same fan at the same time, and heat dissipation of the nozzle is accelerated.

Description

Technical Field

[0001] The present application relates to the field of 3D printing technology, and in particular to a 3D printer nozzle cooling structure. Background Art

[0002] During the use of 3D printers, it is often necessary to replace or recycle consumables. In this process, the consumables usually need to be extracted from the nozzle. Since the consumables at the nozzle are in a molten state during the printing process, they need to be cooled and solidified before being extracted. However, the cooling effect of the existing 3D printers at the nozzle is not ideal, and the consumables cannot be cooled quickly and in time, thus affecting the efficiency of replacement or recycling.

[0003] At present, there are some cooling solutions in the field of 3D printing technology, such as natural cooling or cooling with simple fans. However, these solutions usually cannot meet the needs of fast and uniform cooling, especially when dealing with different types of consumables. Therefore, how to provide a device that can effectively accelerate the cooling and solidification of molten consumables has become an urgent problem to be solved in the current field of 3D printing technology.

[0004] In summary, existing 3D printers have obvious technical problems in cooling the consumables at the nozzle, and a new nozzle cooling device is needed to solve this problem. Utility Model Content

[0005] In order to overcome the above problems, the present application provides a 3D printer nozzle cooling structure and adopts the following technical solution.

[0006] A 3D printer nozzle cooling structure includes a heating block. The heating block includes a main block and a movable block. The main block is provided with a penetrating threaded hole, a heating installation hole, a temperature measuring installation hole and a slot. The heating installation hole and the temperature measuring installation hole are respectively arranged on both sides of the threaded hole. The slot is arranged between the heating installation hole and the temperature measuring installation hole. The slot and the threaded hole are adjacent but not connected. The movable block is movably inserted into the slot.

[0007] By adopting the above technical solution, when the nozzle needs to be heated, the movable block is inserted into the slot to transfer heat to the nozzle; when heat dissipation is needed, the movable block is pulled out, the slot is exposed, and the wall thickness of the main block wrapping the nozzle is significantly reduced, which can speed up the heat dissipation of the nozzle, and a fan can be used to blow at the slot to speed up the heat dissipation of the nozzle. The section of the nozzle that is not inserted into the threaded hole is exposed to the air, and the heat dissipation is faster. The same fan can also be used to blow the slot and the exposed nozzle at the same time to speed up the heat dissipation of the nozzle.

[0008] A preferred structure of the nozzle cooling structure of the 3D printer is that the inner end of the movable block is a concave semi-cylindrical shape. The inner end of the slot is a concave semi-cylindrical cavity. The concave semi-cylindrical cavity is arranged around the threaded hole. The inner end of the movable block is inserted into the inner end of the slot in a fitting manner, and the outer end of the movable block is flush with the outer opening of the slot.

[0009] By adopting the above technical solution, the wall thickness of a larger area around the threaded hole can be reduced as the movable block is withdrawn, which is beneficial to heat dissipation.

[0010] A preferred structure of the 3D printer nozzle cooling structure is that the 3D printer nozzle cooling structure comprises two movable blocks. The main block is provided with two opposite slots, which are respectively located on two sides of the main block. The two movable blocks are inserted into the two slots opposite to each other.

[0011] By adopting the above technical solution, when the movable block is pulled out, the open area around the threaded hole is increased, that is, the area of ​​the threaded hole contacting the air through the thinner wall is increased, which is more conducive to the heat dissipation of the nozzle and throat inside the threaded hole, and is conducive to the solidification of the molten consumables and their extraction to replace other consumables.

[0012] A preferred structure of the 3D printer nozzle cooling structure is that the two slots are connected, and the portion of the main block wrapped by the two slots is a cylindrical ring body. A section of the threaded hole is located on the inner wall of the cylindrical ring body. The two movable blocks are inserted into the two slots and engage with each other, and the two movable blocks are adapted to wrap the cylindrical ring body.

[0013] By adopting the above technical solution, after the two slots are connected, air can flow directly from one slot to the other slot, which is more conducive to the heat dissipation of the cylindrical ring body, that is, conducive to the heat dissipation of the nozzle and throat inside the cylindrical ring body. The two connected movable blocks can be inserted into the slots for heat transfer when heating is required, and pulled out when heat dissipation is required, so as to facilitate the rapid heat dissipation of the internal nozzle and throat.

[0014] A preferred structure of the 3D printer nozzle cooling structure is that the wall thickness of the cylindrical ring body including the internal thread is 2-5 mm.

[0015] By adopting the above technical solution, the cylindrical ring body is conducive to engraving internal threads while maintaining high strength.

[0016] A preferred structure of the 3D printer nozzle cooling structure is that the 3D printer nozzle cooling structure also includes a locking mechanism. The locking mechanism includes a first fixed block, a second fixed block and a movable bolt. The first fixed block is fixed to the movable block. The second fixed block is fixed to the main block. The first fixed block is provided with a penetrating through hole. The second fixed block is provided with a hole slot. The movable bolt passes through the through hole and falls into the hole slot, so that the movable block and the main block are relatively fixed.

[0017] By adopting the above technical solution, the locking mechanism basically eliminates the risk that the movable block may slip out due to the movement of the heating block during printing.

[0018] A preferred structure of the 3D printer nozzle cooling structure is that a limit ring is fixedly provided on the bolt section of the movable bolt between the first fixed block and the second fixed block, and the outer diameter of the limit ring is larger than the inner diameter of the through hole. When the movable bolt falls into the hole groove, the distance between the movable bolt and the first fixed block is larger than the depth of the hole groove.

[0019] By adopting the above technical solution, when the movable bolt is lifted, the movable bolt will not slide out of the first fixed block, but will be stuck on the first fixed block, so that the movable bolt can be used to push and pull the movable block horizontally.

[0020] A preferred structure of the 3D printer nozzle cooling structure is that the main block and the movable block are made of the same material, which is aluminum.

[0021] By adopting the above technical solution, the heat transfer between the main block and the movable block is fast, which is conducive to heating the nozzle and melting the consumables for 3D printing.

[0022] A preferred structure of the 3D printer nozzle cooling structure is that the 3D printer nozzle cooling structure also includes a nozzle, a throat and a heat dissipation pipe. The nozzle is screwed into the threaded hole from one end. The throat is screwed into the threaded hole from the other end and docked with the nozzle. The heat dissipation pipe is fitted on the throat.

[0023] By adopting the above technical solution, the nozzle of this structure can not only maintain the original heat transfer efficiency, but also remove the movable block to speed up the heat dissipation of the nozzle.

[0024] In summary, the 3D printer nozzle cooling structure of the present application has the following beneficial effects: when the nozzle needs to be heated, the movable block is inserted into the slot to transfer heat to the nozzle; when heat dissipation is required, the movable block is pulled out, the slot is exposed, and the wall thickness of the main block wrapping the nozzle is significantly reduced, which can speed up the heat dissipation of the nozzle, and a fan can be used to blow at the slot to speed up the heat dissipation of the nozzle. The section of the nozzle that is not inserted into the threaded hole is exposed to the air, and the heat dissipation is faster. The same fan can also be used to blow the slot and the exposed nozzle at the same time to speed up the heat dissipation of the nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is the front view of the 3D printer nozzle cooling structure.

[0026] Figure 2 for Figure 1 Exploded view of some of the structures.

[0027] Figure 3 for Figure 1 The activity block structure diagram.

[0028] Figure 4 for Figure 1 A three-dimensional image with a movable block hidden.

[0029] Figure 5 for Figure 1 Top view of the structure after sectioning along line BB.

[0030] Figure 6 A diagram of the structure of the 3D printer nozzle cooling structure with two movable blocks hidden.

[0031] Figure 7 for Figure 1 Left view of .

[0032] Figure 8 for Figure 7 The movable bolt is translated out of the local exploded view of the first fixed block and the second fixed block.

[0033] Fig. 9 for Figure 8 A magnified image of area A.

[0034] Figure numerals: 1. heating block; 11. main block; 12. movable block; 111. threaded hole; 112. heating mounting hole; 113. temperature measuring mounting hole; 114. slot; 115. cylindrical ring body; 2. locking mechanism; 21. first fixed block; 22. second fixed block; 23. movable bolt; 211. through hole; 221. hole groove; 231. limiting ring; 3. nozzle; 4. throat; 5. heat dissipation pipe. DETAILED DESCRIPTION

[0035] The present application is further described below in conjunction with the accompanying drawings.

[0036] Please refer to Figure 1 , a 3D printer nozzle cooling structure, comprising a heating block 1. The heating block 1 comprises a main block 11 and a movable block 12.

[0037] Please refer to Figure 2 , the main block 11 is provided with a penetrating threaded hole 111, and also with a heating mounting hole 112, a temperature measuring mounting hole 113 and a slot 114. The heating mounting hole 112 and the temperature measuring mounting hole 113 are respectively arranged on both sides of the threaded hole 111. The heating mounting hole 112 and the temperature measuring mounting hole 113 can be arranged in parallel, and the threaded hole 111 is perpendicular to the heating mounting hole 112. The heating mounting hole 112 can be used to install an electric heating element. The temperature measuring mounting hole 113 can be used to install a thermocouple. The threaded hole 111 can be used to install the threaded section of the nozzle 3 and the threaded section of the throat 4 that are connected to each other. The filament of the 3D printing consumables passes through the throat 4 and the nozzle 3, is heated and melted by the electric heating element at the heating block 1, flows out of the nozzle 3, and 3D printing is realized by moving the nozzle 3 along the X, Y, and Z axes. Thermocouples are used for temperature measurement, which facilitates the system to regulate the power of the electric heating element.

[0038] The slot 114 is disposed between the heating installation hole 112 and the temperature measuring installation hole 113. The slot 114 is adjacent to the threaded hole 111 but not connected, for example, the minimum distance is 2-5 mm, or the average distance is 2-5 mm, or the distance at each relative position is 2-5 mm, the distance may also be less than 2 mm, or may be 5-10 mm, etc. The movable block 12 is movably inserted into the slot 114.

[0039] For the nozzle cooling structure of the 3D printer, when the nozzle 3 needs to be heated, the movable block 12 can be inserted into the slot 114, and the movable block 12 is connected to the main block 11 to transfer heat to the nozzle 3. When heat dissipation is required, for example, when replacing or recycling consumables, the movable block 12 can be pulled out, and the slot 114 is exposed, and the wall thickness of the main block 11 that wraps the nozzle 3 is significantly reduced, which can speed up the heat dissipation of the nozzle 3. A fan can be used to blow at the slot 114 to speed up the heat dissipation of the nozzle 3, and the previously melted consumables are cooled and solidified, and the original consumables are directly pulled out upwards, and then new consumables are inserted. Since a section of the nozzle 3 that is not inserted into the threaded hole 111 is exposed to the air, the heat dissipation is faster, and the same fan can be used to blow the slot 114 and the exposed nozzle 3 at the same time to speed up the heat dissipation of the nozzle 3.

[0040] Please refer to Figure 3 In order to enhance the cooling effect of the nozzle 3, the inner end of the movable block 12 is set to be a concave semi-cylindrical shape, that is, the inner end surface is a concave semi-cylindrical surface. Figure 4The inner end of the slot 114 is a concave semi-cylindrical cavity, and the concave semi-cylindrical cavity is arranged around the threaded hole 111. The inner end of the movable block 12 is inserted into the inner end of the slot 114 to facilitate efficient heat transfer, and the outer end of the movable block 12 is flush with the outer opening of the slot 114. When heat dissipation is required, the solid wall thickness of the larger area around the threaded hole 111 can be reduced as the movable block 12 is withdrawn, which is conducive to heat dissipation.

[0041] In order to further enhance the cooling effect on the nozzle 3, the 3D printer nozzle cooling structure is designed to include two movable blocks 12. The main block 11 is provided with two opposite slots 114, which are respectively located on both sides of the main block 11. The two movable blocks 12 are inserted into the two slots 114 opposite to each other. In this design, the two slots 114 may be disconnected or connected. Through the above design, when the movable block 12 is pulled out, the open area around the threaded hole 111 is increased, that is, the area of ​​the threaded hole 111 contacting the air through the thinner wall is increased, which is more conducive to the heat dissipation of the nozzle 3 and the throat 4 inside the threaded hole 111, and is conducive to the solidification of the molten consumables and their extraction to replace other consumables.

[0042] Please refer to Figure 5 A preferred embodiment is that the two slots 114 are connected, and the part of the main block 11 wrapped by the two slots 114 is a cylindrical ring body 115. One section of the threaded hole 111 is located on the inner wall of the cylindrical ring body 115, and the upper and lower sections of the threaded hole 111 are located at the upper and lower plates of the main block 11 where the slots 114 are not opened, that is, the upper and lower ends of the cylindrical ring body 115 are also integrally connected to the upper and lower plates to be supported and fixed. The two movable blocks 12 are inserted into the two slots 114 from both sides and engage with each other in the slots 114, and the two movable blocks 12 wrap the cylindrical ring body 115 in a close fit.

[0043] Please refer to Figure 6 In the above preferred embodiment, the two slots 114 are connected, and the two connected movable blocks 12 can be inserted into the slots 114 for heat transfer when heating is required, and pulled out when heat dissipation is required. Air can flow directly from one side slot 114 to the other side slot 114, which is more conducive to the heat dissipation of the cylindrical ring body 115 and the heat dissipation of the nozzle 3 and the throat 4 inside the cylindrical ring body 115.

[0044] In an optional embodiment, the wall thickness of the cylindrical ring body 115 including its internal thread (the internal thread formed by engraving the threaded hole 111) is 2-5 mm. The cylindrical ring body 115 with such a wall thickness is not only conducive to engraving the internal thread, but also maintains a high strength and a high heat dissipation efficiency.

[0045] Please refer to Figure 7During 3D printing, the heating block 1 and the nozzle 3 need to be moved. In order to prevent the movable block 12 from sliding out of the slot 114, the 3D printer nozzle cooling structure further includes a locking mechanism 2. The locking mechanism 2 includes a first fixed block 21, a second fixed block 22 and a movable bolt 23.

[0046] Please refer to Figure 8 and Fig. 9 , the first fixed block 21 is fixed on the movable block 12. The second fixed block 22 is fixed on the main block 11. The first fixed block 21 is provided with a penetrating through hole 211. The second fixed block 22 is provided with a hole slot 221. The movable bolt 23 passes through the through hole 211 and falls into the hole slot 221, so that the movable block 12 and the main block 11 are relatively fixed. The locking mechanism 2 basically eliminates the risk that the movable block 12 may slip out due to the movement of the heating block 1 during printing.

[0047] In order to prevent the movable bolt 23 from being moved out of the first fixed block 21 when the movable bolt 23 is lifted, a limit ring 231 can be fixedly provided on the bolt section of the movable bolt 23 between the first fixed block 21 and the second fixed block 22, and the outer diameter of the limit ring 231 is larger than the inner diameter of the through hole 211. When the movable bolt 23 falls into the hole groove 221, the distance between the movable bolt 23 and the first fixed block 21 is larger than the depth of the hole groove 221. When the movable bolt 23 is lifted, the movable bolt 23 will not slide out of the first fixed block 21, but will be stuck on the first fixed block 21 through the limit ring 231, which facilitates the use of the movable bolt 23 to complete the action of horizontally pushing and pulling the movable block 12.

[0048] The material of the main block 11 and the movable block 12 is preferably the same, for example, both are aluminum, so that the heat transfer between the main block 11 and the movable block 12 is fast, which is beneficial to transfer heat to the nozzle 3 and melt the consumables in the nozzle 3 for 3D printing.

[0049] Optionally, the 3D printer nozzle cooling structure further includes a nozzle 3, a throat 4 and a heat dissipation pipe 5. The nozzle 3 is screwed into the threaded hole 111 from one end. The throat 4 is screwed into the threaded hole 111 from the other end and docked with the nozzle 3. The heat dissipation pipe 5 is fitted on the throat 4. The nozzle 3 of this structure can not only maintain the original heat transfer efficiency, but also remove the movable block 12 to speed up the heat dissipation of the nozzle 3, so that when the printer replaces or recycles consumables, the consumables in the nozzle 3 are quickly cooled and solidified, and the consumables are conveniently pulled out from the upper end of the nozzle 3.

[0050] The above description is only a preferred embodiment of the present application and is not intended to limit the protection scope of the present application. For those skilled in the art, various equivalent substitutions and modifications can be made according to the above description, and these substitutions and modifications should be included in the protection scope of the present application.

Claims

1. A 3D printer nozzle cooling structure, characterized in that: The heating block (1) comprises a main block (11) and a movable block (12); the main block (11) is provided with a penetrating threaded hole (111), a heating installation hole (112), a temperature measurement installation hole (113) and a slot (114); The heating installation hole (112) and the temperature measurement installation hole (113) are respectively arranged on both sides of the threaded hole (111); the slot (114) is arranged in the middle of the heating installation hole (112) and the temperature measurement installation hole (113); the slot (114) and the threaded hole (111) are adjacent but not connected; and the movable block (12) is movably inserted into the slot (114).

2. The 3D printer nozzle cooling structure according to claim 1, characterized in that: The inner end of the movable block (12) is in a concave semi-cylindrical shape; the inner end of the slot (114) is in a concave semi-cylindrical cavity; the concave semi-cylindrical cavity is arranged around the threaded hole (111); the inner end of the movable block (12) is inserted into the inner end of the slot (114) in a fitting manner, and the outer end of the movable block (12) is flush with the outer opening of the slot (114).

3. The 3D printer nozzle cooling structure according to claim 2, characterized in that: The 3D printer nozzle cooling structure comprises two movable blocks (12); the main block (11) is provided with two opposite slots (114), which are respectively located on two sides of the main block (11); and the two movable blocks (12) are oppositely inserted into the two slots (114).

4. The 3D printer nozzle cooling structure according to claim 3, characterized in that: The two slots (114) are connected, and the portion of the main block (111) wrapped by the two slots (114) is a cylindrical ring body (115); a section of the threaded hole (111) is located on the inner wall of the cylindrical ring body (115); the two movable blocks (12) are inserted into the two slots (114) and engage with each other, and the two movable blocks (12) adaptively wrap the cylindrical ring body (115).

5. The 3D printer nozzle cooling structure according to claim 4, characterized in that: The cylindrical ring body (115) has a wall thickness of 2 to 5 mm including the internal thread.

6. The 3D printer nozzle cooling structure according to any one of claims 1 to 5, characterized in that: The 3D printer nozzle cooling structure further comprises a locking mechanism (2); the locking mechanism (2) comprises a first fixed block (21), a second fixed block (22) and a movable bolt (23); the first fixed block (21) is fixed to the movable block (12); the second fixed block (22) is fixed to the main block (11); the first fixed block (21) is provided with a penetrating through hole (211); the second fixed block (22) is provided with a hole slot (221); the movable bolt (23) passes through the through hole (211) and falls into the hole slot (221), so that the movable block (12) and the main block (11) are relatively fixed.

7. The 3D printer nozzle cooling structure according to claim 6, characterized in that: A limit ring (231) is fixedly provided on the bolt section of the movable bolt (23) between the first fixed block (21) and the second fixed block (22); the outer diameter of the limit ring (231) is greater than the inner diameter of the through hole (211); when the movable bolt (23) falls into the hole groove (221), the distance between the movable bolt (23) and the first fixed block (21) is greater than the depth of the hole groove (221).

8. The 3D printer nozzle cooling structure according to claim 1, characterized in that: The main block (11) and the movable block (12) are made of the same material, which is aluminum.

9. The 3D printer nozzle cooling structure according to claim 1, characterized in that: The 3D printer nozzle cooling structure further comprises a nozzle (3), a throat (4) and a heat dissipation pipe (5); the nozzle (3) is screwed into the threaded hole (111) from one end; the throat (4) is screwed into the threaded hole (111) from the other end and butt-jointed with the nozzle (3); and the heat dissipation pipe (5) is fitted over the throat (4).

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