Wind field structure of 3D printer and 3D printer

Abstract

The utility model discloses a 3D printer wind field structure and 3D printer, the 3D printer wind field structure comprises a molding chamber, the side wall of the molding chamber is respectively provided with an air inlet pipe and an air outlet pipe, the air inlet pipe and the air outlet pipe are both communicated with the molding chamber, the air inlet pipe is internally connected with a plurality of pore plates, the pore plates are provided with a plurality of wind holes, and the wind holes are communicated with the molding chamber. The multiple pore plates are arranged at intervals in the air flow direction, and the air holes in every two adjacent pore plates are formed in a staggered mode. The 3D printer comprises the 3D printer wind field structure. The utility model has the beneficial effects that inert gas airflow can conveniently pass through the air holes on each pore plate after entering the air inlet pipe, and the air holes on the two adjacent pore plates are arranged in a staggered manner, so that the airflow is conveniently homogenized once after passing through the air plate once, the airflow is gradually homogenized, the uneven discharge caused by uneven airflow is prevented, and the discharge quality is improved. Flaws, edge warping, faults and the like are caused on the surface of a printed object.

Description

Technical Field

[0001] The utility model relates to the technical field of 3D printer structures, and in particular to a 3D printer wind field structure and a 3D printer. Background Art

[0002] Additive manufacturing technology (3D printing technology) is more suitable for manufacturing parts with complex shapes than traditional processing technology. Due to its technical flexibility, additive manufacturing technology has been widely used in biomedicine, automobile, aerospace, military industry and other fields.

[0003] During metal additive manufacturing (3D) printing, particles and smoke are generated during the printing and sintering process. These particles fall back onto the print surface, affecting the melt pool morphology at the corresponding location when the next layer is printed, causing bulges on the printed surface and resulting in poor workpiece quality. Furthermore, the smoke can obscure the camera's ability to monitor the powder surface.

[0004] Currently, air inlets and outlets are located on two opposing side walls of the working chamber. High-purity inert gases, such as nitrogen or argon, enter through the inlets and exit through the outlets. This inert gas circulation controls the oxygen content within the chamber to reduce the generation of byproducts. However, since the inert gas enters the molding chamber directly through a pipe, the airflow velocity into the molding chamber is uneven. This uneven airflow velocity can cause the following problems: 1. It can lead to uneven discharge, resulting in surface defects, warping, and faults on the printed object. 2. It can cause poor discharge, thus affecting printing speed. Summary of the Invention

[0005] The purpose of the utility model is to provide a 3D printer wind field structure and a 3D printer, which can make the wind flow formed by the inert gas uniform and prevent the surface of the printed object from having defects, warping and faults caused by uneven wind flow.

[0006] In order to achieve the above-mentioned purpose, the present utility model adopts the following technical solutions.

[0007] A 3D printer air field structure includes a molding chamber, an air inlet duct and an air outlet duct disposed on the sidewalls of the molding chamber, both of which are in communication with the molding chamber. The air inlet duct is connected to a plurality of orifice plates, each of which has a plurality of air holes. The orifice plates are spaced apart along the airflow direction, with the air holes on adjacent orifice plates being staggered. During operation, pressure is applied to the air duct to ensure that the air pressure at the inlet and outlet ducts is the same.

[0008] The utility model adopting the above technical solution connects several orifice plates in the air inlet pipe and provides several air holes on the orifice plates. This facilitates the inert gas airflow to enter the air inlet pipe and then pass through the air holes on each orifice plate. The air holes on two adjacent orifice plates are staggered to facilitate the airflow to flow out through the air holes after encountering the position where the air plate does not have holes. The airflow is evened out once, and each time it passes through the air plate, the airflow is evened out, so that the airflow is gradually evened out, preventing uneven discharge caused by uneven airflow, which may lead to defects, warping, faults, etc. on the printed object surface. It also prevents poor discharge caused by uneven airflow and ensures printing speed.

[0009] Preferably, the air inlet pipe includes an upper air inlet pipe and a lower air inlet pipe, the lower air inlet pipe and the air outlet pipe are respectively arranged on two opposite side walls, and the upper air inlet pipe and the air outlet pipe are located on the same side wall and above the air outlet pipe.

[0010] In this way, by arranging the lower air inlet pipe and the air outlet pipe on the opposite side walls respectively, the upper air inlet pipe and the air outlet pipe are located on the same side wall and above the air outlet pipe, and by arranging two opposite and vertically staggered air inlet pipes, the airflow entering the inner cavity forms a spiral shape, so that airflow passes through the entire molding chamber, avoiding dead corners of airflow and preventing by-products from accumulating in the dead corners of airflow.

[0011] Preferably, the orifice plates include a plurality of orifice plates, which are arranged along the length direction of the lower air inlet pipe, and the four sides of the orifice plates are sealed and connected to the side walls of the lower air inlet pipe.

[0012] In this way, multiple orifice plates are arranged along the length of the lower air inlet pipe, so that the airflow passes through the orifice plates in sequence along the air inlet pipe. After multiple equalization of airflow, the airflow velocity into the molding chamber is uniform. The orifice plates are sealed to the side walls of the lower air inlet pipe on all sides, so that the airflow passes only through the air holes, ensuring the effect of uniform airflow velocity.

[0013] Preferably, the orifice plates are perpendicular to the side walls of the lower air inlet pipe, and a distance is set between each orifice plate.

[0014] Preferably, the air holes are evenly distributed on the orifice plate, and the air holes are circular or polygonal.

[0015] Preferably, an upper molding chamber air inlet is provided at the connection between the molding chamber and the upper air inlet pipe, and a lower molding chamber air inlet is provided at the connection between the molding chamber and the lower air inlet pipe, and orifice plates are installed at both the upper molding chamber air inlet and the lower molding chamber air inlet.

[0016] In this way, by installing orifice plates at the air inlet of the upper molding chamber and the air inlet of the lower molding chamber, the flow rate of the air flow can be uniformed again.

[0017] Preferably, the upper air inlet pipes and the lower air inlet pipes are both included in plurality, and the plurality of upper air inlet pipes are connected side by side to form a row, and the plurality of lower air inlet pipes are connected side by side to form a row.

[0018] In this way, by connecting several of the upper air inlet pipes side by side to form a row, and connecting several of the lower air inlet pipes side by side to form a row, airflow can enter the molding chamber in the length direction, further preventing the formation of airflow dead corners in the molding chamber.

[0019] Preferably, an upper wind field inlet and a lower wind field inlet are respectively provided at the top of the upper air inlet duct and the lower air inlet duct, the cross section of the upper air inlet duct is larger than the upper wind field inlet, and the cross section of the lower air inlet duct is larger than the lower wind field inlet.

[0020] In this way, by making the cross section of the upper air inlet pipe larger than the upper wind field entrance and the cross section of the lower air inlet pipe larger than the lower wind field entrance, the cross section through which the airflow passes is increased, thereby facilitating uniform airflow velocity.

[0021] In order to achieve the above-mentioned object, an embodiment of the present utility model further provides a 3D printer, comprising the above-mentioned 3D printer wind field structure.

[0022] The beneficial effect of the present invention is that, by connecting several orifice plates within the air inlet pipe and providing several air holes on the orifice plates, it is convenient for the inert gas airflow to enter the air inlet pipe and then pass through the air holes on each orifice plate. The air holes on two adjacent orifice plates are staggered, so that the airflow is evened out each time it passes through the air plates, making the airflow gradually even, thereby preventing uneven discharge caused by uneven airflow, which may lead to defects, warping, and faults on the printed object surface. It also prevents poor discharge caused by uneven airflow, thereby ensuring printing speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural diagram of the utility model;

[0024] Figure 2 This utility model Figure 1 Cross-sectional view of middle AA;

[0025] Figure 3 It is a structural diagram of the utility model;

[0026] Figure 4 This is a structural diagram of the utility model with a galvanometer added. DETAILED DESCRIPTION

[0027] The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the scope of the embodiments described.

[0028] The figure marks in the drawings of the specification include: upper wind field inlet 10, upper air inlet duct 101, lower wind field inlet 11, lower air inlet duct 111, orifice plate 112, air hole 1121, molding chamber 12, upper molding chamber air inlet 121, lower molding chamber air inlet 122, molding chamber air outlet 123, air outlet duct 13, laser component 14.

[0029] The words "first", "second" and similar terms used in the embodiments of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "one", "an" or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. Similarly, words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections or communication connections, whether direct or indirect.

[0030] See also Figures 1 to 4 A 3D printer wind field structure includes a molding chamber 12, and an air inlet pipe and an air outlet pipe 13 are respectively provided on the side walls of the molding chamber 12. The air inlet pipe and the air outlet pipe 13 are both connected to the molding chamber 12. A plurality of orifice plates 112 are connected to the air inlet pipe, and a plurality of air holes 1121 are provided on the orifice plates 112. The plurality of orifice plates 112 are arranged at intervals along the wind direction, and the air holes 1121 on two adjacent orifice plates 112 are staggered.

[0031] See also Figure 1 The air inlet pipe includes an upper air inlet pipe 101 and a lower air inlet pipe 111. The lower air inlet pipe 111 and the air outlet pipe 13 are respectively arranged on opposite side walls. The upper air inlet pipe 101 and the air outlet pipe 13 are located on the same side wall and above the air outlet pipe 13.

[0032] By setting two opposite and vertically staggered air inlet pipes, the airflow entering the inner cavity forms a spiral shape, so that airflow passes through the entire molding chamber 12, avoiding dead corners of airflow and preventing by-products from accumulating in the dead corners of airflow.

[0033] See also Figure 2 The orifice plates 112 include several orifice plates 112 , which are arranged along the length direction of the lower air inlet pipe 111 , and the four sides of the orifice plates 112 are sealed and connected to the side walls of the lower air inlet pipe 111 .

[0034] In this way, several orifice plates 112 are arranged along the length of the lower air inlet pipe 111, so that the airflow passes through the orifice plates 112 in sequence along the air inlet pipe. After multiple equalizations, the airflow velocity into the molding chamber 12 is uniform. The orifice plates 112 are sealed to the side walls of the lower air inlet pipe 111 around the periphery so that the airflow passes only through the air holes 1121, ensuring a uniform airflow velocity.

[0035] See also Figure 2 The orifice plates 112 are perpendicular to the sidewalls of the lower air inlet pipe 111, with a set distance between each orifice plate 112. The air holes 1121 are evenly distributed on the orifice plates 112 and are circular or polygonal. The molding chamber 12 is provided with an upper molding chamber air inlet 121 at its connection with the upper air inlet pipe 101, and a lower molding chamber air inlet 122 at its connection with the lower air inlet pipe 111. Orifice plates 112 are installed at both the upper molding chamber air inlet 121 and the lower molding chamber air inlet 122.

[0036] See also Figures 1 to 3 The upper air inlet pipe 101 and the lower air inlet pipe 111 each include a plurality of them, and the plurality of the upper air inlet pipes 101 are connected side by side to form a row, and the plurality of the lower air inlet pipes 111 are connected side by side to form a row.

[0037] See also Figures 1 to 3 The upper air inlet 10 and the lower air inlet 111 are respectively provided with an upper air field inlet 10 and a lower air field inlet 11 at the top. The cross-section of the upper air inlet 101 is larger than the upper air field inlet 10, and the cross-section of the lower air inlet 111 is larger than the lower air field inlet 11. Thus, by making the cross-section of the upper air inlet 101 larger than the upper air field inlet 10 and the cross-section of the lower air inlet 111 larger than the lower air field inlet 11, the cross-section through which the air flows is increased, facilitating uniform airflow velocity.

[0038] See also Figure 4 The laser component is installed at the upper end of the wind farm through the mounting plate. The laser component includes a galvanometer, a camera and other components. The situation inside the molding cavity is observed in real time through the camera, and the printing powder is melted by the galvanometer.

[0039] The wind field in this utility model can be extended infinitely in length to meet the needs of printing large products. During operation, the wind field and the laser components installed on the wind field move synchronously along the printing base plate to meet the needs of molding products of different widths.

[0040] Example 2, a 3D printer, includes the above-mentioned 3D printer wind field structure.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A 3D printer wind field structure, characterized in that: The invention comprises a molding chamber (12), and an air inlet pipe and an air outlet pipe (13) are respectively arranged on the side wall of the molding chamber (12), the air inlet pipe and the air outlet pipe (13) are both connected to the molding chamber (12), a plurality of orifice plates (112) are connected to the air inlet pipe, a plurality of air holes (1121) are arranged on the orifice plates (112), and the plurality of orifice plates (112) are arranged at intervals along the wind flow direction, and the air holes (1121) on two adjacent orifice plates (112) are arranged in a staggered manner.

2. The 3D printer wind field structure according to claim 1, characterized in that: The air inlet pipe comprises an upper air inlet pipe (101) and a lower air inlet pipe (111); the lower air inlet pipe (111) and the air outlet pipe (13) are respectively arranged on two opposite side walls; the upper air inlet pipe (101) and the air outlet pipe (13) are located on the same side wall and above the air outlet pipe (13).

3. The 3D printer wind field structure according to claim 2, characterized in that: The orifice plates (112) include a plurality of orifice plates (112), which are arranged along the length direction of the lower air inlet pipe (111), and the four sides of the orifice plates (112) are sealed and connected to the side walls of the lower air inlet pipe (111).

4. The 3D printer wind field structure according to claim 3, characterized in that: The orifice plates (112) are perpendicular to the side walls of the lower air inlet pipe (111), and a set distance is provided between each orifice plate (112).

5. The 3D printer wind field structure according to claim 3, characterized in that: The air holes (1121) are evenly distributed on the orifice plate (112), and the air holes (1121) are circular or polygonal in shape.

6. The 3D printer wind field structure according to claim 2, characterized in that: An upper molding chamber air inlet (121) is provided at the connection between the molding chamber (12) and the upper air inlet pipe (101), and a lower molding chamber air inlet (122) is provided at the connection between the molding chamber (12) and the lower air inlet pipe (111). Orifice plates (112) are installed at both the upper molding chamber air inlet (121) and the lower molding chamber air inlet (122).

7. The 3D printer wind field structure according to claim 2, characterized in that: The upper air inlet pipe (101) and the lower air inlet pipe (111) each include a plurality of them, and the plurality of the upper air inlet pipes (101) are connected side by side to form a row, and the plurality of the lower air inlet pipes (111) are connected side by side to form a row.

8. The 3D printer wind farm structure according to any one of claims 2 to 7, characterized in that: An upper wind field inlet (10) and a lower wind field inlet (11) are respectively provided at the top of the upper air inlet pipe (101) and the top of the lower air inlet pipe (111); the cross-section of the upper air inlet pipe (101) is larger than the upper wind field inlet (10), and the cross-section of the lower air inlet pipe (111) is larger than the lower wind field inlet (11).

9. A 3D printer, characterized in that: The 3D printer wind field structure comprises the 3D printer wind field structure according to any one of claims 1 to 8.

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