Vortex airflow generator with fused deposition 3D printing nozzles arranged obliquely and oppositely

Abstract

The invention relates to a fused deposition 3D printing nozzle obliquely-opposite vortex airflow generator, and belongs to the field of 3D printing additive manufacturing equipment.The fused deposition 3D printing nozzle obliquely-opposite vortex airflow generator comprises a generator body, the generator body is arranged on a flow guide groove of a 3D printing nozzle and composed of a left air outlet and a right air outlet, and the left air outlet and the right air outlet are obliquely and oppositely arranged with the nozzle of the 3D printing nozzle as the center; a left air flow guide claw is arranged on the left air outlet, a right air flow guide claw is arranged on the right air outlet, under the clamping of the heat dissipation effect of omni-directional vortex cooling, the 3D printer can successfully print an arm extension structure, and the included angle between the arm extension structure and the vertical direction ranges from 0 degree to 85 degrees under the supporting-free condition; the structural reliability of a 3D printing model is enhanced, the phenomena of wiredrawing, edge curling, thermal deformation, bridging droop and the like are further reduced, and the success rate of 3D printing is increased.

Description

Technical Field

[0001] The invention relates to an obliquely opposed vortex airflow generator for a fused deposition 3D printing nozzle, belonging to the field of 3D printing additive manufacturing equipment. Background Art

[0002] In FDM 3D printers, the heat dissipation efficiency of the nozzle will greatly affect the printing quality. If the heat dissipation efficiency is low, wire drawing, curling, thermal deformation, and bridging sagging may occur during the printing process. When printing structures with an angle greater than 45° from the vertical direction, it is often necessary to add supports to ensure successful printing, which limits the arm span angle of the model design to a certain extent. Summary of the invention

[0003] In view of this, the present invention provides a fused deposition 3D printing nozzle obliquely opposed vortex airflow generator, adjusts the air outlet direction and air outlet ratio, and sets an airflow guide claw, which is divided into a main air outlet and an auxiliary air outlet according to the size of the air outlet, so as to solve the above-mentioned problems existing in the prior art.

[0004] The technical solution of the present invention to solve the above technical problems is as follows:

[0005] A fused deposition 3D printing nozzle obliquely opposed vortex airflow generator comprises a generator body, wherein the generator body is arranged on a guide groove of the 3D printing nozzle, and is composed of a left air outlet and a right air outlet which are obliquely arranged opposite to each other with the nozzle of the 3D printing nozzle as the center, wherein the left air outlet is provided with a left airflow guide claw, and the right air outlet is provided with a right airflow guide claw.

[0006] Based on the above technical solution, the present invention can also be improved as follows.

[0007] Further, the left air outlet comprises a left main air outlet and a left auxiliary air outlet, the opening direction of the left main air outlet is inclined from the upper left to the lower right in the horizontal direction, and is inclined downward in the vertical direction, the opening direction of the left auxiliary air outlet is inclined from the lower left to the upper right in the horizontal direction, and is inclined downward in the vertical direction, and the inclination angle is smaller than that of the left main air outlet, the left airflow guide claw is mounted on the left auxiliary air outlet, the airflow of the left auxiliary air outlet is guided downward in the vertical direction at the end of the guide claw through the left airflow guide claw, and merges with the airflow of the opposite right main air outlet to form a spiral airflow;

[0008] The right side air outlet comprises a right side main air outlet and a right side auxiliary air outlet. The opening direction of the right side main air outlet is inclined from the lower right to the upper left in the horizontal direction, and is inclined downward in the vertical direction. The opening direction of the right side auxiliary air outlet is inclined from the upper right to the lower left in the horizontal direction, and is inclined downward in the vertical direction, and the inclination angle is smaller than that of the right side main air outlet. The right side airflow guide claw is mounted on the right side auxiliary air outlet, and the airflow from the right side auxiliary air outlet is guided downward in the vertical direction at the end of the guide claw through the left side airflow guide claw, and merges with the airflow from the opposite left side main air outlet to form a spiral airflow.

[0009] The air inlets of the main air outlet and the auxiliary air outlet are equal in size, but since the air outlet of the main air outlet is larger than that of the auxiliary air outlet, the wind speed of the main air outlet is slower than that of the auxiliary air outlet. Therefore, relatively speaking, the wind blown out of the main air outlet is low-speed wind, and the wind blown out of the auxiliary air outlet is high-speed wind.

[0010] Furthermore, the main air outlet is changed from a conventional straight air outlet to an oblique air outlet, and the oblique air outlet is inclined in the horizontal direction and the vertical direction:

[0011] The horizontal oblique air outlet design makes the two-way airflow staggered to avoid the reduction of heat dissipation efficiency due to the impact of airflow. In the vertical direction, the main air outlet is tilted downward at a certain angle, so that the airflow direction is below the nozzle, which is beneficial to the heat dissipation of the consumables extruded by the nozzle;

[0012] The angle between the air outlet direction of the auxiliary air outlet and the air outlet direction of the main air outlet is an acute angle. Compared with the main air outlet, since the air outlet of the auxiliary air outlet is smaller, the strong horizontal wind blown out from the auxiliary air outlet helps to integrate part of the airflow of the main air outlet, avoiding excessive airflow loss at the main air outlet, which is not conducive to heat dissipation.

[0013] Furthermore, the left airflow guide claw has a bending angle in the horizontal direction, and the end thereof has a bending angle in the vertical direction;

[0014] The right airflow guide claw has a bending angle in the horizontal direction, and the end thereof has a bending angle in the vertical direction.

[0015] During the printing process, the movement direction of the nozzle of the 3D printer is mostly counterclockwise (from a bird's-eye view), so the airflow guide claw is set at the left front and right rear, thereby forming a counterclockwise annular heat dissipation airflow, which is conducive to the heat dissipation of the airflow along the direction of the nozzle movement. The airflow guide claw installed on the secondary air outlet not only guides the airflow direction of the air outlet, but also has a twisted design at the end of the airflow guide claw, which allows the airflow to form an air vortex around the bottom of the nozzle, thereby achieving the effect of omnidirectional vortex cooling and heat dissipation.

[0016] The beneficial effects of the present invention are:

[0017] The airflow generated by the cooling fan of the print head flows through the guide groove and enters the obliquely opposed vortex airflow generator. Under the action of the obliquely opposed vortex airflow generator, the airflow forms a counterclockwise airflow vortex around the bottom of the nozzle, thereby achieving a horizontally opposed omnidirectional vortex cooling and heat dissipation effect.

[0018] With the heat dissipation effect of this omnidirectional eddy current cooling, the 3D printer can successfully print an arm span structure with an angle of 0-85° to the vertical direction without support, enhancing the structural reliability of the 3D printed model, further reducing the occurrence of drawing, curling, thermal deformation, and bridging sagging, and improving the success rate of 3D printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of a molten deposition 3D printing nozzle equipped with an obliquely opposed vortex airflow generator according to the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the obliquely opposed vortex airflow generator of the present invention;

[0021] Figure 3 It is a schematic diagram of the airflow of the obliquely opposed vortex airflow generator of the present invention;

[0022] Figure 4 It is a cross-sectional view of the structure of the obliquely opposed vortex airflow generator of the present invention;

[0023] Figure 5 This is a schematic diagram of the air outlet structure of the obliquely opposed vortex airflow generator of the present invention;

[0024] Figure 6 This is a schematic diagram of the main air outlet structure of the obliquely opposed vortex airflow generator of the present invention;

[0025] Figure 7 This is a schematic diagram of the auxiliary air outlet structure of the present invention;

[0026] Figure 8 This is a schematic diagram of the structure of the airflow guide claw of the present invention;

[0027] Fig. 9 This is an airflow guide diagram of the obliquely opposed vortex airflow generator of the present invention in the horizontal direction of the molten deposition 3D printing nozzle;

[0028] Fig.10 This is an airflow guide diagram of the obliquely opposed vortex airflow generator of the present invention in the vertical direction of the molten deposition 3D printing nozzle.

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] 1. Left air outlet, 2. Right air outlet, 3. Left air flow guide claw, 4. Right air flow guide claw, 5. Nozzle, 6. Guide groove, 7. Cooling fan, 8. Extruder, 9. First X-axis crossbar, 10. Second X-axis crossbar, 11. Left main air outlet, 12. Left auxiliary air outlet, 13. Right main air outlet, 14. Right auxiliary air outlet. DETAILED DESCRIPTION

[0031] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0032] like Figure 1-2 As shown, the print head of the 3D printer includes a nozzle 5, a guide groove 6, a cooling fan 7, and an extruder 8. The print head moves on the first X-axis crossbar 9 and the second X-axis crossbar 10 of the 3D printer. The cooling fan 7 is arranged above the guide groove 6. The guide groove 6 is connected to an obliquely opposed vortex airflow generator. The obliquely opposed vortex airflow generator includes a generator body, which is composed of a left air outlet 1 and a right air outlet 2 that are obliquely opposite to each other with the nozzle 5 as the center. A left airflow guide claw 3 is arranged on the left air outlet 1, and a right airflow guide claw 4 is arranged on the right air outlet 2. The airflow generated by the cooling fan 7 flows through the guide groove 6 into the obliquely opposed vortex airflow generator, and flows out from the left air outlet 1 and the right air outlet 2 of the obliquely opposed vortex airflow generator respectively.

[0033] The left air outlet 1 and the right air outlet 2 are designed as mirror images, and the left airflow guide claw 3 and the right airflow guide claw 4 are designed as mirror images.

[0034] During the printing process of the 3D printer, the movement direction of the nozzle 5 is mostly counterclockwise (from a top view). Figure 4 The left airflow guide claw 3 and the right airflow guide claw 4 are respectively mounted on the left auxiliary air outlet 12 and the right auxiliary air outlet 14, and are set at the left front and right rear, thereby forming a counterclockwise annular heat dissipation airflow, which is beneficial to the heat dissipation of the airflow along the direction of movement of the nozzle 5.

[0035] like Figure 4 The left main air outlet 11 and the right main air outlet 13 are set as oblique air outlets, and the inclination direction of the oblique air outlets is divided into horizontal direction and vertical direction. The inclination direction of the left main air outlet 11 in the horizontal direction is from the upper left to the lower right, and the inclination direction of the right main air outlet 13 in the horizontal direction is from the lower right to the left.

[0036] like Figure 3 The oblique air outlet design of the left main air outlet 11 and the right main air outlet 13 makes the two-way airflow staggered with each other, avoiding the reduction of heat dissipation effect due to the impact of airflow.

[0037] like Figure 4 , the left auxiliary air outlet 12 of the left air outlet 1 is inclined in the horizontal direction from the lower left to the upper right, and the right auxiliary air outlet 14 of the right air outlet 2 is inclined in the horizontal direction from the upper right to the lower left;

[0038] like Figure 3 , the left air outlet 1 is tilted from the upper right to the lower left. Figure 3 It can be seen that the angle between the air outlet direction of the left air outlet 1 and the left main air outlet 11 is an acute angle, and the angle between the air outlet direction of the right auxiliary air outlet 14 of the right air outlet 2 and the right main air outlet 13 is an acute angle.

[0039] like Figure 3 , the airflow blown out from the left auxiliary air outlet 12 has a faster flow rate than that of the left main air outlet 11, so the airflow of the left auxiliary air outlet 12 will first contact with the left airflow guide claw 3, and then integrate the oblique airflow blown out from the left main air outlet 11, so as to avoid excessive loss of the oblique airflow of the left main air outlet 11. The airflow blown out from the right auxiliary air outlet 14 of the right air outlet 2 has a faster flow rate than that of the right main air outlet 13, so the airflow of the right auxiliary air outlet 14 will first contact with the right airflow guide claw 4, and then integrate the oblique airflow blown out from the right main air outlet 13, so as to avoid excessive loss of the oblique airflow of the right main air outlet 13.

[0040] like Figure 4 Since the left airflow guide claw 3 and the right airflow guide claw 4 have a certain bending angle in the horizontal direction, the airflow blown out from the left auxiliary air outlet 12 will have a certain rotation angle under the guidance of the left airflow guide claw 3, and the airflow blown out from the right auxiliary air outlet 14 will have a certain rotation angle under the guidance of the right airflow guide claw 4.

[0041] like Figure 3 Under the guidance of the left airflow guide claw 3 and the right airflow guide claw 4, the airflow coming out of the left main air outlet 11 and the left auxiliary air outlet 12 will merge with the airflow coming out of the right main air outlet 13 and the right auxiliary air outlet 14, and will form a counterclockwise (from a top view) airflow vortex around the nozzle 5.

[0042] like Figure 5Taking the left side air outlet 1 as an example, the left side air outlet 1 is composed of a left side main air outlet 11 and a left side auxiliary air outlet 12, and is divided into the left side main air outlet 11 and the left side auxiliary air outlet 12 according to the size of the air outlet. The air inlet sizes of the left side main air outlet 11 and the left side auxiliary air outlet 12 are equal, but because the air outlet of the left side main air outlet 11 is larger than that of the left side auxiliary air outlet 12, relatively speaking, the airflow blown out of the left side main air outlet 11 is a low-speed airflow, and the airflow blown out of the left side auxiliary air outlet 12 is a high-speed airflow, and the left side airflow guide claw 3 is mounted on the left side auxiliary air outlet 12.

[0043] like Figure 8 In the vertical direction, the end of the left airflow guide claw 3 is set to be twisted downward at a certain angle. Figure 6 It can be seen that the opening direction of the left main air outlet 11 is tilted downward at a certain angle in the vertical direction. Figure 7 It can be seen that the opening direction of the left auxiliary air outlet 12 is tilted downward at a certain angle in the vertical direction, so the vortex airflow formed by the convergence of the airflows coming out of the air outlets on both sides is below the nozzle 5, and the vortex airflow cools the printing material coming out of the nozzle 5 without cooling the nozzle 5 itself.

[0044] like Fig. 9 Under the action of the obliquely opposed vortex airflow generators, the airflow forms a counterclockwise vortex heat dissipation airflow in the horizontal direction, and at the same time forms a vortex eye in the center.

[0045] like Fig.10 The nozzle 5 is located directly above the vortex eye, so the nozzle 5 itself will not be affected by the vortex airflow. During the printing process, the movement direction of the nozzle 5 is mostly counterclockwise (from a top view), and the direction of the counterclockwise vortex airflow is the same as the movement direction of the nozzle 5, which is conducive to heat dissipation along the direction of the nozzle 5 movement.

[0046] like Fig.10 Under the action of the obliquely opposed vortex airflow generators, the formed vortex heat dissipation airflow is inclined downward in the vertical direction, and the downward inclined airflow is beneficial to cooling the printing material coming out of the nozzle 5.

[0047] With the heat dissipation effect of this omnidirectional eddy current cooling, the 3D printer can successfully print an arm span structure with an angle of 0-85° to the vertical direction without support, enhancing the structural reliability of the 3D printed model, while reducing the occurrence of drawing, curling, thermal deformation, and bridging sagging, thereby improving the success rate of 3D printing.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A vortex airflow generator for a fused deposition 3D printing nozzle, characterized in that: The generator body comprises a generator body, which is arranged on the guide groove of the 3D printing nozzle and consists of a left air outlet and a right air outlet which are arranged obliquely opposite to each other with the nozzle of the 3D printing nozzle as the center, a left air flow guide claw is arranged on the left air outlet, and a right air flow guide claw is arranged on the right air outlet.

2. According to claim 1, the obliquely opposed vortex airflow generator of the fused deposition 3D printing nozzle is characterized in that: The left-side air outlet includes a left-side main air outlet and a left-side auxiliary air outlet. The opening direction of the left-side main air outlet is inclined from the upper left to the lower right in the horizontal direction, and is inclined downward in the vertical direction. The opening direction of the left-side auxiliary air outlet is inclined from the lower left to the upper right in the horizontal direction, and is inclined downward in the vertical direction, and the inclination angle is smaller than that of the left-side main air outlet. The left-side airflow guide claw is mounted on the left-side auxiliary air outlet.

3. The obliquely opposed vortex airflow generator for the fused deposition 3D printing nozzle according to claim 1 or 2, characterized in that: The left airflow guide claw has a bending angle in the horizontal direction, and the end thereof has a bending angle in the vertical direction.

4. The obliquely opposed vortex airflow generator for the fused deposition 3D printing nozzle according to claim 1, characterized in that: The right side air outlet includes a right side main air outlet and a right side auxiliary air outlet. The opening direction of the right side main air outlet is inclined from the lower right to the upper left in the horizontal direction, and is inclined downward in the vertical direction. The opening direction of the right side auxiliary air outlet is inclined from the upper right to the lower left in the horizontal direction, and is inclined downward in the vertical direction, and the inclination angle is smaller than that of the right side main air outlet. The right airflow guide claw is mounted on the right side auxiliary air outlet.

5. The obliquely opposed vortex airflow generator for the fused deposition 3D printing nozzle according to claim 1 or 4, characterized in that: The right airflow guide claw has a bending angle in the horizontal direction, and the end thereof has a bending angle in the vertical direction.

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