A heat dissipation device for a 3D printer

Abstract

The utility model relates to a kind of 3D printer heat dissipation device, including arched frame body, the air duct is formed in arched frame body inside, the top of arched frame body is provided with the air inlet that is communicated with air duct, first fan is installed at air inlet, the bottom of arched frame body is provided with air outlet at both ends respectively, the space for accommodating printer nozzle is formed between the two air outlets, two the air outlet is relative to air duct main stem portion and is inclined 90 °~120 ° angle of inclusion, and the extension line of air outlet points to the lower region of the space for accommodating printer nozzle.The utility model's arched frame body and internal air duct form optimized flow path, the airflow generated by first fan is concentrated by two inclined air outlets after rectification and is concentratedly blown to nozzle extrusion lower region, double beam airflow synchronously cools just extruded molten material, accelerates its setting, significantly improve the dimensional accuracy and interlaminar bond strength of printing piece.

Description

Technical Field

[0001] This utility model relates to the field of 3D printer heat dissipation technology, and in particular to a 3D printer heat dissipation device. Background Technology

[0002] Fused Deposition Modeling (FDM) is currently the mainstream technology used in desktop 3D printers. Its process involves feeding a filament of thermoplastic material into the nozzle, heating it to a molten state via a heating element, extruding it, and depositing it layer by layer. To ensure smooth extrusion and avoid excessively long molten sections, a steep temperature gradient must be established between the nozzle's heating zone and the feed zone: the heating element needs to be maintained at a high temperature of around 200°C, while the adjacent throat / heat dissipation zone needs to be rapidly cooled to below 60°C to prevent premature softening of the material and subsequent nozzle clogging. Furthermore, the freshly extruded molten material needs to be cooled and solidified promptly to improve dimensional accuracy and interlayer bonding strength.

[0003] Existing technologies generally use direct fan cooling. Because the fan airflow is diffused, the effective air volume utilization rate is low and the heat dissipation efficiency is insufficient. To compensate for the lack of efficiency, it is often necessary to increase the fan speed, which brings noise and vibration problems. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a heat dissipation device for a 3D printer.

[0005] The technical solution is as follows: A 3D printer heat dissipation device includes an arched frame, an air duct is formed inside the arched frame, an air inlet communicating with the air duct is opened at the top of the arched frame, a first fan is installed at the air inlet, and air outlets are opened at both ends of the bottom of the arched frame. A space for accommodating the printer nozzle is formed between the two air outlets. The two air outlets are inclined at an angle of 90° to 120° relative to the main part of the air duct, and the extension line of the air outlets points to the area below the space accommodating the printer nozzle.

[0006] As an improvement to the above solution, the diameter of the two air outlets is reduced to a narrow opening.

[0007] As an improvement to the above solution, the two air outlets are staggered at an angle of 5° to 10°.

[0008] As an improvement to the above solution, a triangular slope b is formed on the inner wall of the air duct at the air inlet, in a longitudinal section parallel to the axis of the first fan. The airflow blown out by the first fan is divided by the slope and discharged from two air outlets respectively.

[0009] As an improvement to the above solution, the first fan is a turbo fan.

[0010] As an improvement to the above solution, the height difference between the lower edge of the air outlet and the lower reference surface of the space used to accommodate the printer nozzle is between 1 and 1.5 mm.

[0011] As an improvement to the above solution, the side of the arched frame is also provided with a second fan and a heat dissipation fin assembly, the heat dissipation fin assembly being arranged in the air delivery path of the second fan; the heat dissipation fin assembly is provided with a through cavity for accommodating the printer nozzle.

[0012] As an improvement to the above solution, shock-absorbing pads are provided between the first fan, the second fan and the arched frame.

[0013] The beneficial effects of this utility model are:

[0014] 1. The arched frame and internal air duct of this invention form an optimized airflow path. The airflow generated by the first fan is rectified and then concentrated and blown into the area below the nozzle extrusion through two inclined air outlets. The dual airflows simultaneously cool the freshly extruded molten material, accelerating its shaping and significantly improving the dimensional accuracy and interlayer bonding strength of the printed parts. Furthermore, the air outlets are inclined at an angle of 90° to 120° relative to the main air duct section, optimizing the airflow turning angle and effectively reducing wind resistance and energy loss.

[0015] 2. This utility model forms a narrow opening by narrowing the air outlet, which significantly increases the airflow velocity and air pressure concentration, and greatly improves the cooling and heat dissipation efficiency.

[0016] 3. The air outlets of this utility model are staggered at an angle of 5° to 10°, so that the dual airflows form an intersecting coverage area below the nozzle discharge, effectively reducing the cooling blind zone and ensuring the stability of the molding process.

[0017] 4. The air inlet of this utility model is provided with a slope of a specific shape (the longitudinal section is triangular), which effectively guides and splits the airflow generated by the first fan into two streams, so that they arrive at the dual air outlets at the same time, which significantly improves the air volume utilization rate and reduces the wind resistance.

[0018] 5. This utility model precisely controls the height difference between the lower edge of the air outlet and the tip plane of the nozzle within the range of 1 to 1.5 mm, ensuring that the cooling air stream can accurately adhere to the extruded molten wire, achieving timely cooling and shaping, while effectively preventing strong airflow from blowing away the printed layer that is still in a semi-molten state.

[0019] 6. The second fan of this utility model works in conjunction with the heat dissipation fin assembly to form a powerful active heat dissipation system for the nozzle root area, which significantly enhances the cooling capacity of the throat / heat dissipation area, making the temperature gradient between the nozzle heating area and the feeding area steeper, and effectively reducing the risk of premature softening and clogging of consumables.

[0020] 7. This utility model adds a shock-absorbing pad between the first fan, the second fan and the arched frame, which effectively absorbs the high-frequency vibration generated during the operation of the fan, significantly reduces the overall operating noise of the machine, and makes the printing environment quieter. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a cross-sectional view of the arched frame of this utility model.

[0023] Figure 3 This is a schematic diagram showing the air blowing direction of the air outlet of the arched frame of this utility model and the direction of the nozzle extruding molten material.

[0024] Figure 4 This is a schematic diagram of the structure of the second fan, heat sink fins, and mounting plate of this utility model.

[0025] Figure 5 This is a bottom view of the arched frame, which is a schematic diagram of this utility model.

[0026] The labels in the diagram are as follows: 1. Arched frame, 1a. Inverted U-shaped air duct, 1b. Slope, 11. Air inlet, 12. Air outlet, 13. Mounting column, 2. First fan, 3. Nozzle, 4. Second fan, 41. Heat dissipation fin assembly, 42. Mounting plate. Detailed Implementation

[0027] The above-described solution will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of this application. The implementation conditions used in the embodiments may be further adjusted according to the conditions of specific manufacturers, and the implementation conditions not specified are generally those in routine experiments.

[0028] like Figure 1-5 As shown, the 3D printer heat dissipation device of this embodiment includes an arched frame 1 with an overall arched shape. A continuous air duct 1a is integrally formed inside the arched frame 1, and an air inlet 11 communicating with the air duct 1a is opened at the center of its top. The first fan 2 is fixed at the air inlet 11 by screws and shock-absorbing pads. In order to reduce wind resistance and improve the uniformity of air output, a guide slope 1b is formed on the inner wall of the air duct 1a below the air inlet 11. The slope 1b is triangular in longitudinal section parallel to the vertical axis of the first fan 2. The first fan 2 is a turbine fan. Its high-speed airflow is split by the slope 1b and smoothly guided to the air outlets 12 at both ends of the bottom along the inverted U-shaped path of the air duct 1a, ensuring that the two air jets arrive at the printer nozzle 3 area simultaneously.

[0029] refer to Figure 2 and Figure 5Both air outlets 12 are located at the bottom of the arched frame 1 and are arranged symmetrically at the center. The space between them is used to accommodate the printer nozzle 3. The diameter of the air outlets 12 is narrowed to form a narrow opening, which further concentrates the airflow. The center lines of the two air outlets 12 (narrow openings) are staggered at an angle of 5° to 10°, so that the air jets form a cross-coverage area below the nozzle extrusion, eliminating the cooling blind zone. The height difference between the lower edge of the air outlet 12 and the lower reference surface (i.e., the tip plane of the nozzle 3) of the space used to accommodate the printer nozzle 3 is strictly controlled between 1-1.5mm, which ensures that the air jets accurately adhere to the fuse and avoids blowing away the half-molten layer.

[0030] refer to Figure 1 and Figure 4 To further enhance throat cooling, a second fan 4 and a heat dissipation fin assembly 41 are also provided on the side of the arched frame 1. The heat dissipation fin assembly 41 is located on the airflow path of the second fan 4. The heat dissipation fin assembly 41 has a through cavity for accommodating the printer nozzle, forming a powerful active heat dissipation for the root area of ​​the printer nozzle 3 accommodated in the through cavity. This makes the temperature gradient between the heating zone and the feeding zone steeper, significantly reducing the risk of premature softening and blockage of consumables. The side of the heat dissipation fin assembly 41 away from the second fan 4 is mounted on a mounting plate 42, and the mounting plate 42 is connected to the reserved mounting post 13 on the arched frame 1. The heat dissipation fin assembly 41, the second fan 4, and the arched frame 1 are fixed together as a whole by the mounting plate 42.

[0031] It should be noted that shock-absorbing pads are provided between the first fan 2, the second fan 4 and the arched frame 1, which effectively absorb high-frequency vibrations, significantly reducing the noise during device operation and making the printing environment quieter.

[0032] Through the above structure, this embodiment achieves efficient, precise, and low-noise heat dissipation for the nozzle and its extrusion area without increasing the fan speed, significantly improving the dimensional accuracy, interlayer bonding strength, and overall reliability of the printed parts.

[0033] The embodiments described above are merely preferred embodiments of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications, improvements, and substitutions without departing from the inventive concept, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A heat dissipation device for a 3D printer, characterized in that, The device includes an arched frame (1), an air duct (1a) is formed inside the arched frame (1), an air inlet (11) communicating with the air duct (1a) is opened at the top of the arched frame (1), a first fan (2) is installed at the air inlet (11), and air outlets (12) are opened at both ends of the bottom of the arched frame (1). A space for accommodating a printer nozzle (3) is formed between the two air outlets (12). The two air outlets (12) are inclined at an angle of 90° to 120° relative to the main part of the air duct, and the extension line of the air outlets (12) points to the area below the space accommodating the printer nozzle (3).

2. The 3D printer heat dissipation device of claim 1, wherein, The diameter of the two air outlets (12) is narrowed.

3. The 3D printer heat dissipation device of claim 2, wherein, The two air outlets (12) are offset at an angle of 5° to 10°.

4. The 3D printer heat dissipation device of claim 3, wherein, On the inner wall of the air duct at the air inlet (11), a triangular slope (1b) is formed on the longitudinal section parallel to the axis of the first fan (2). The airflow blown out by the first fan (2) is divided by the slope (1b) and discharged from the two air outlets (12).

5. The 3D printer heat dissipation device of claim 4, wherein, The first fan (2) is a turbo fan.

6. The 3D printer heat dissipation device of claim 5, wherein, The height difference between the lower edge of the air outlet (12) and the lower reference surface of the space used to accommodate the printer nozzle (3) is between 1 and 1.5 mm.

7. The 3D printer heat dissipation device of claim 6, wherein, The side of the arched frame (1) is also provided with a second fan (4) and a heat dissipation fin assembly (41), the heat dissipation fin assembly (41) being arranged on the air supply path of the second fan (4); the heat dissipation fin assembly (41) is provided with a through cavity for accommodating the printer nozzle (3).

8. The 3D printer heat dissipation device of claim 7, wherein, A shock-absorbing pad is provided between the first fan (2), the second fan (4) and the arched frame (1).

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