3D printer with cooling function

Abstract

The utility model belongs to additive manufacturing technology field discloses a kind of 3D printer with cooling function, including silk machine and cooling device, cooling device includes annular air guide main body and fan, the air volume of annular air guide main body is concentrated stably by first air outlet passage and second air outlet passage to the two sides of the filament below silk machine spray head, reduce the printing filament temperature from spray head, annular centripetal convergent airflow realizes the uniform efficient cooling of filament, significantly reduce model warping and overhang collapse, improve space comprehensive force and surface finish, to enhance the forming effect of printing model. By first air outlet and second air outlet, airflow is accurately controlled to act on just extruded consumable area, further reduce the interference of spray head hot end and printing path, and then make silk machine run higher printing speed, improve printing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of additive manufacturing technology, and in particular to a 3D printer with a cooling function. Background Technology

[0002] FDM (Fused Deposition Modeling) 3D printers create three-dimensional solid models by heating and melting thermoplastic materials and then depositing them layer by layer.

[0003] FDM 3D printers are currently the most widely used and cost-effective 3D printing method. During filament ejection, they typically rely on natural cooling from ambient temperature or accelerated cooling using side fans. Common problems include uneven and inefficient cooling, potential airflow interference with the printing path or vertical structures, and difficulty in precisely controlling the temperature of the cooling zone. These issues lead to consequences such as model warping, insufficient interlayer adhesion, vertical structure collapse, poor surface quality, and limited printing speed. This makes it difficult to meet the requirements of high-value-added products like 3D-printed medical devices in terms of shape, structure, and mechanical properties, and also results in low printer productivity.

[0004] Therefore, there is an urgent need to develop a 3D printer with cooling capabilities to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a 3D printer with a cooling function, which solves the problems of uneven cooling and low efficiency, airflow interference with the printing path, and difficulty in accurately controlling the temperature of the cooling area in existing cooling methods, thereby improving the quality of printed products, especially vertical structures and surface accuracy, and thus improving printing efficiency.

[0006] To achieve this objective, the present invention adopts the following technical solution: A 3D printer with cooling function includes: The filament extruder is equipped with a nozzle, which is used to extrude printing filaments. The cooling device includes an annular air guide body and a fan. The fixed end of the fan is fixedly connected to the annular air guide body. The annular air guide body is provided with an air inlet channel, a first air outlet channel and a second air outlet channel. The air outlet of the air inlet channel is connected to the first air inlet of the first air outlet channel and the second air inlet of the second air outlet channel respectively. The first air outlet of the first air outlet channel and the second air outlet of the second air outlet channel are symmetrically distributed on both sides above the nozzle outlet. The axis of the first air outlet channel and the axis of the second air outlet channel are both arc-shaped. The outlet of the fan is connected to the air inlet of the air inlet channel.

[0007] Preferably, the cooling device also includes an adjusting component, one end of which is fixedly connected to the annular air guide body, and the other end of which is slidably connected to the yarn extruder. The sliding direction of the adjusting component is parallel to the axial direction of the nozzle.

[0008] Preferably, the other end of the adjusting component is fixedly connected to a limiting block, and a limiting hole is opened on the yarn feeder. The length direction of the limiting hole extends along the axial direction parallel to the nozzle, and the limiting block is slidably connected to the hole wall of the limiting hole.

[0009] Preferably, the location where the air outlet direction of the first air outlet intersects with the air outlet direction of the second air outlet is designated as the cooling zone. The cooling zone is located in the nozzle outlet direction, and the distance between the first air outlet and the second air outlet along the nozzle axis and the nozzle outlet is 0.9mm-2.1mm.

[0010] Preferably, the angle between the air outlet direction of the first air outlet and the nozzle outlet direction, and the angle between the air outlet direction of the second air outlet and the nozzle outlet direction, are equal, and both are within the range of 54°. ° -56 ° .

[0011] Preferably, along the axial direction of the air inlet channel, from the air inlet to the air outlet, the inner diameter of the air inlet channel becomes smaller and smaller.

[0012] Preferably, the diameter of the first air inlet is equal to the diameter of the second air inlet, and the diameter of the first air outlet is equal to the diameter of the second air outlet.

[0013] Preferably, the annular air guide body is provided with a first threaded hole, and the fixed end of the fan is provided with a second threaded hole, and a screw is threaded through the first threaded hole and the second threaded hole.

[0014] Preferably, the number of first threaded holes and the number of second threaded holes are both at least two and correspond one-to-one, and at least two second threaded holes are evenly distributed along the circumference of the fan fixed end.

[0015] As a preferred option, the annular air guide body is made of high-temperature resistant plastic products; And / or, the fan is a vortex fan.

[0016] The beneficial effects of this utility model are: This invention provides a 3D printer with a cooling function, including a filament extruder and a cooling device. The cooling device includes an annular air guide body and a fan. The annular air guide body concentrates and stably outputs the fan's airflow through a first air outlet channel and a second air outlet channel to both sides of the filament below the nozzle of the filament extruder, reducing the temperature of the printed filament exiting the nozzle. The annular concentric airflow achieves uniform and efficient cooling of the filament, significantly reducing model warping and sagging, improving spatial integrity and surface finish, thereby enhancing the molding effect of the printed model. By precisely controlling the airflow through the first and second air outlets to act on the area where the filament is just extruded, interference between the hot end of the nozzle and the printing path is further reduced, thus enabling the filament extruder to operate at a higher printing speed and improving printing efficiency. Attached Figure Description

[0017] Figure 1 This is a first structural schematic diagram of the 3D printer provided in this embodiment; Figure 2 This is a schematic diagram of the second structure of the 3D printer provided in this embodiment; Figure 3 yes Figure 2 The front view; Figure 4 yes Figure 2 The right view; Figure 5 yes Figure 2 The left view; Figure 6 yes Figure 2 A bottom view; Figure 7 A schematic diagram of the cooling device provided in this embodiment; Figure 8 yes Figure 7 The front view; Figure 9 yes Figure 8 Enlarged structural diagram at point A; Figure 10 yes Figure 7 The right view; Figure 11 yes Figure 10 Cross-sectional view along the BB direction; Figure 12 yes Figure 7 A bottom view; Figure 13 yes Figure 12 Enlarged structural diagram at point C (illustration of airflow).

[0018] In the picture: 100. Silk extruder; 110. Nozzle; 120. Limiting hole; 200. Cooling device; 210. Annular air guide body; 211. Air inlet channel; 212. First air outlet channel; 2121. First air outlet; 213. Second air outlet channel; 2131. Second air outlet; 214. First threaded hole; 220. Fan; 221. Second threaded hole; 230. Adjusting component; 231. Limiting block. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0020] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0023] The purpose of this invention is to provide a 3D printer with a cooling function, which solves the problems of uneven cooling and low efficiency, airflow interference with the printing path, and difficulty in accurately controlling the temperature of the cooling area in existing cooling methods, thereby improving the quality of printed products, especially vertical structures and surface accuracy, and thus improving printing efficiency.

[0024] Specifically, such as Figures 1 to 13 As shown, a 3D printer with a cooling function includes a filament extruder 100 and a cooling device 200. The filament extruder 100 is equipped with a nozzle 110 for extruding printing filament. The cooling device 200 includes an annular air guide body 210 and a fan 220. The annular air guide body 210 is equipped with an air inlet channel 211, a first air outlet channel 212, and a second air outlet channel 213. The air outlet of the air inlet channel 211 is connected to the first air inlet of the first air outlet channel 212 and the second air inlet of the second air outlet channel 213, respectively. The first air outlet 2121 of the first air outlet channel 212 and the second air outlet 2131 of the second air outlet channel 213 are symmetrically distributed on both sides above the nozzle 110 outlet. The axis of the first air outlet channel 212 and the axis of the second air outlet channel 213 are both arc-shaped, that is, the first air outlet channel 212 and the second air outlet channel 213 are arc-shaped channels, which achieves the effect of concentrically converging airflow. The fixed end of the fan 220 is fixedly connected to the annular air guide body 210, thereby fixing the fan 220 to the annular air guide body 210 and ensuring that the fan 220 outputs cold air stably. The outlet of the fan 220 is connected to the air inlet of the air inlet channel 211.

[0025] The annular air guide body 210 concentrates and stably outputs the airflow from the fan 220 through the first air outlet channel 212 and the second air outlet channel 213 to both sides of the filament below the nozzle 110 of the filament extruder 100, reducing the temperature of the printed filament exiting the nozzle 110. The annular concentric airflow achieves uniform and efficient cooling of the filament, significantly reducing model warping and sagging, improving spatial overall strength and surface smoothness, thereby enhancing the forming effect of the printed model. The airflow is precisely controlled by the first air outlet 2121 and the second air outlet 2131 to act on the area where the filament has just been extruded, further reducing interference between the hot end of the nozzle 110 and the printing path, thus enabling the filament extruder 100 to operate at a higher printing speed and improving printing efficiency. Furthermore, the cooling device 200 has a simple structure, is easy to assemble, and is easy to install with the filament extruder 100.

[0026] Furthermore, such as Figures 1 to 2As shown, the annular air guide body 210 is provided with a first threaded hole 214, and the fixed end of the fan 220 is provided with a second threaded hole 221. A screw is threaded through the first threaded hole 214 and the second threaded hole 221 to connect the fan 220 to the annular air guide body 210. In other embodiments, the fixed end of the fan 220 and the annular air guide body 210 can be welded or bonded.

[0027] Furthermore, the number of first threaded holes 214 and the number of second threaded holes 221 are both at least two and correspond one-to-one. The at least two second threaded holes 221 are evenly distributed along the circumference of the fixed end of the fan 220, improving the connection stability between the fan 220 and the annular air guide body 210. In this embodiment, the number of first threaded holes 214 is two. In other embodiments, the number of first threaded holes 214 can be three, four, or five, etc.

[0028] Optionally, the annular air guide body 210 is made of high-temperature resistant plastic, enabling it to withstand the high-temperature environment during operation, while reducing its weight and corrosion risk, thus combining durability and lightweight advantages. The fan 220 is a vortex fan 220, generating stronger air pressure, improving the penetration and coverage efficiency of the cooling airflow, and enhancing the cooling effect. In this embodiment, the annular air guide body 210 is made of polytetrafluoroethylene (PTFE). In other embodiments, the annular air guide body 210 may also be made of polyimide, polyphenylene sulfide (PPS), or polysulfone, etc.

[0029] Optionally, such as Figure 1 and Figure 7 As shown, the cooling device 200 also includes an adjusting member 230. One end of the adjusting member 230 is fixedly connected to the annular air guide body 210, and the other end is slidably connected to the yarn output machine 100. The sliding direction of the adjusting member 230 is parallel to the axial direction of the nozzle 110. By driving the annular air guide body 210 to slide through the adjusting member 230, the distance between the first air outlet 2121 and the second air outlet 2131 and the nozzle 110 can be adjusted to meet the requirements of different process parameters. In this embodiment, the adjusting member 230 is a long strip plate structure. In other embodiments, the adjusting member 230 can also be a cuboid block structure or a columnar structure. It should be noted that after the position of the annular air guide body 210 is adjusted, the adjusting member 230 is fixedly connected to the yarn output machine 100 by screws. This is a common technical means used by those skilled in the art and will not be described in detail here.

[0030] Furthermore, such as Figure 1 and Figure 2As shown, the other end of the adjusting member 230 is fixedly connected to a limiting block 231. A limiting hole 120 is provided on the yarn feeder 100. The length direction of the limiting hole 120 extends along the axial direction parallel to the nozzle 110. The limiting block 231 is slidably connected to the hole wall of the limiting hole 120, thereby realizing the adjustment of the position of the annular air guide body 210 and the nozzle 110. At the same time, the movement of the annular air guide body 210 along the direction perpendicular to the axial direction of the nozzle 110 is restricted by the cooperation of the limiting block 231 and the limiting hole 120, so that the positions of the first air outlet 2121 and the second air outlet 2131 are always adjusted in the direction parallel to the axial direction of the nozzle 110. In other embodiments, a slide rail can be provided on the adjusting member 230, and a slide groove can be provided on the yarn feeder 100, with the slide rail and the slide groove slidingly engaged.

[0031] Furthermore, such as Figures 5 to 7 As shown, the intersection of the air outlet directions of the first air outlet 2121 and the second air outlet 2131 is designated as the cooling zone. This cooling zone is located in the nozzle 110 outlet direction. The distance between the first air outlet 2121 and the second air outlet 2131 along the nozzle 110 axial direction and the nozzle 110 outlet is 0.9mm-2.1mm. This prevents interference and collision between the sidewalls of the first air outlet 2121 and the second air outlet 2131 and the nozzle 110 during printing, which would affect the cooling effect on the filament in the cooling zone. In this embodiment, the distance between the first air outlet 2121 and the second air outlet 2131 along the nozzle 110 axial direction and the nozzle 110 outlet is 1.5mm. In other embodiments, the distance between the first air outlet 2121 and the second air outlet 2131 along the nozzle 110 axial direction and the nozzle 110 outlet can be 0.9mm, 1.4mm, or 2.1mm, etc.

[0032] Furthermore, such as Figures 8 to 11 As shown, the angle between the air outlet direction of the first air outlet 2121 and the outlet direction of the nozzle 110, and the angle between the air outlet direction of the second air outlet 2131 and the outlet direction of the nozzle 110, are equal and both fall within the range of 54°. ° -56 ° This creates a converging airflow, maximizing the airflow from both the first and second outlets towards the cooling zone, further enhancing the cooling effect on the filament. In this embodiment, the angle between the airflow direction of the first outlet 2121 and the outlet direction of the nozzle 110, and the angle between the airflow direction of the second outlet 2131 and the outlet direction of the nozzle 110, are both 55 degrees. ° In other embodiments, the angle between the air outlet direction of the first air outlet 2121 and the outlet direction of the nozzle 110, and the angle between the air outlet direction of the second air outlet 2131 and the outlet direction of the nozzle 110, can both be 54°. ° Or 56 ° wait.

[0033] Optionally, along the axial direction of the air inlet channel 211, from the air inlet to the air outlet, the inner diameter of the air inlet channel 211 becomes smaller and smaller. The continuous reduction in the inner diameter is conducive to the stable concentration of cold air entering the air inlet channel 211, and can increase the wind speed entering the first air outlet channel 212 and the second air outlet channel 213, further improving the cooling effect of the cooling device 200.

[0034] Furthermore, such as Figure 12 and Figure 13 As shown, the aperture of the first air inlet is equal to the aperture of the second air inlet, so that the air volume distributed by the air inlet channel 211 to the first air outlet channel 212 and the second air outlet channel 213 is equal. In addition, the aperture of the first air outlet 2121 is equal to the aperture of the second air outlet 2131, so that the air volume of the first air outlet 2121 and the second air outlet 2131 is the same, further improving the uniformity of cooling of the wire material.

[0035] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A 3D printer with a cooling function, characterized in that, include: A filament extruder (100) is provided with a nozzle (110) for extruding printing filaments; A cooling device (200) includes an annular air guide body (210) and a fan (220). The fixed end of the fan (220) is fixedly connected to the annular air guide body (210). The annular air guide body (210) is provided with an air inlet channel (211), a first air outlet channel (212), and a second air outlet channel (213). The air outlet of the air inlet channel (211) is connected to the first air inlet of the first air outlet channel (212) and the second air outlet channel (213). The second air inlets of the two air outlet channels (213) are connected respectively. The first air outlet (2121) of the first air outlet channel (212) and the second air outlet (2131) of the second air outlet channel (213) are symmetrically distributed on both sides above the nozzle (110) outlet. The axis of the first air outlet channel (212) and the axis of the second air outlet channel (213) are both arc-shaped. The outlet of the fan (220) is connected to the air inlet of the air inlet channel (211).

2. The 3D printer with cooling function according to claim 1, characterized in that, The cooling device (200) further includes an adjusting member (230), one end of which is fixedly connected to the annular air guide body (210), and the other end of which is slidably connected to the yarn extruder (100). The sliding direction of the adjusting member (230) is parallel to the axial direction of the nozzle (110).

3. The 3D printer with cooling function according to claim 2, characterized in that, The other end of the adjusting member (230) is fixedly connected to a limiting block (231). A limiting hole (120) is opened on the yarn feeder (100). The length direction of the limiting hole (120) extends along the axial direction parallel to the nozzle (110). The limiting block (231) is slidably connected to the hole wall of the limiting hole (120).

4. The 3D printer with cooling function according to claim 1, characterized in that, The location where the air outlet direction of the first air outlet (2121) intersects with the air outlet direction of the second air outlet (2131) is designated as a cooling zone. The cooling zone is located in the outlet direction of the nozzle (110). The distance between the first air outlet (2121) and the second air outlet (2131) along the axial direction of the nozzle (110) and the outlet of the nozzle (110) is 0.9mm-2.1mm.

5. The 3D printer with cooling function according to claim 4, characterized in that, The angle between the air outlet direction of the first air outlet (2121) and the outlet direction of the nozzle (110) is equal to the angle between the air outlet direction of the second air outlet (2131) and the outlet direction of the nozzle (110), and both are within the range of 54°. ° -56 ° .

6. The 3D printer with cooling function according to claim 1, characterized in that, Along the axial direction of the air inlet channel (211), from the air inlet to the air outlet, the inner diameter of the air inlet channel (211) becomes smaller and smaller.

7. The 3D printer with cooling function according to claim 6, characterized in that, The diameter of the first air inlet is equal to the diameter of the second air inlet, and the diameter of the first air outlet (2121) is equal to the diameter of the second air outlet (2131).

8. The 3D printer with cooling function according to claim 1, characterized in that, The annular air guide body (210) is provided with a first threaded hole (214), and the fixed end of the fan (220) is provided with a second threaded hole (221). A screw is threaded through the first threaded hole (214) and the second threaded hole (221).

9. The 3D printer with cooling function according to claim 8, characterized in that, The number of the first threaded hole (214) and the number of the second threaded hole (221) are both at least two and correspond one-to-one. At least two of the second threaded holes (221) are evenly distributed along the circumference of the fixed end of the fan (220).

10. The 3D printer with cooling function according to any one of claims 1-7, characterized in that, The annular air guide body (210) is made of high-temperature resistant plastic. And / or, the fan (220) is a vortex fan.

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