A wind circulation system of a 3D printing device

Abstract

The utility model discloses a wind circulation system of 3D printing device, including box, the box includes bottom wall, left side wall, right side wall, front side wall, back wall and top wall, is provided with the through hole on the bottom wall. Be provided with upper air inlet pipe and lower air inlet pipe on the right side wall, be provided with the air suction pipe on the left side wall, be provided with lower mounting hole on the right side wall, the lower air inlet pipe includes the air outlet head of setting in the right side wall inner wall and the air supply pipe of setting in the right side wall outer wall, the air outlet head is provided with a plurality of honeycomb distribution and with lower mounting hole through -going air outlet, the air supply pipe includes the connecting pipe, the elbow pipe with the air outlet side through -going of connecting pipe, the flat mouth pipe with the air outlet side connection of elbow pipe, flat mouth pipe with lower mounting hole through -going, the air outlet both ends are chamfered. Advantage: a plurality of honeycomb arrangement air outlet make the airflow of entering the box can guarantee the airflow stability even of entering the box, ensure that the airflow to the box different position because of laser sintering and splash powder can be evenly airflow blow and take out the box.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing, specifically to a wind circulation system for a 3D printing device. Background Technology

[0002] In 3D printing equipment, it is necessary to collect the molding powder that splashes out inside the molding chamber due to laser sintering. The conventional solution is to install an air circulation system inside the molding chamber, using air circulation to extract the splashed powder out of the chamber. However, the air inlet duct of the existing air circulation system is directly connected to the chamber. Due to the bends in the duct during actual installation, the airflow velocity and direction are unstable when it blows into the chamber, resulting in poor extraction of splashed powder.

[0003] Therefore, it is necessary to provide an air circulation system for a 3D printing device. Utility Model Content

[0004] This utility model provides a 3D printing device air circulation system that effectively solves the problem of poor powder removal effect in the molding box of 3D printing equipment air circulation system.

[0005] The technical solution adopted by this utility model is:

[0006] A 3D printing device's air circulation system includes a housing. The housing includes a bottom wall, a left side wall, a right side wall, a front side wall, a rear side wall, and a top wall. A through hole is provided on the bottom wall. An upper air inlet pipe and a lower air inlet pipe are arranged vertically on the right side wall. A suction pipe is provided on the left side wall. A lower mounting hole is provided on the right side wall. The lower air inlet pipe includes an air outlet on the inner wall of the right side wall and an air supply pipe on the outer wall of the right side wall. The air outlet has several honeycomb-shaped air outlets that communicate with the lower mounting hole. The air supply pipe includes a connecting pipe, a bent pipe communicating with the air outlet side of the connecting pipe, and a flat-mouthed pipe connected to the air outlet side of the bent pipe. The flat-mouthed pipe communicates with the lower mounting hole. Both ends of the air outlets are chamfered.

[0007] Furthermore, the air outlet head includes an air outlet body and a No. 1 plate disposed on the air outlet body, and a plurality of air outlet holes are disposed on the air outlet body, and the No. 1 plate is sealed to the right side wall.

[0008] Furthermore, a left mounting hole is provided on the left side wall, and the suction pipe includes a No. 3 plate provided on the inner side of the left side wall, a guide cylinder provided on the inner side of the No. 3 plate, and a No. 3 pipe provided on the outer side of the left side wall. Several horizontal No. 3 flow channels are provided on the No. 3 plate, and the two ends of the No. 3 flow channels are respectively connected to the left mounting hole and the guide cylinder, and the No. 3 pipe is connected to the left mounting hole.

[0009] Furthermore, one end of the guide cylinder is connected to the air outlet, and the other end of the guide cylinder is configured as a horn opening.

[0010] Furthermore, the flat-mouth pipe includes a first rectangular air outlet that connects to the bend pipe and a second rectangular air outlet that communicates with the lower mounting hole. The length of the second rectangular air outlet is greater than the length of the first rectangular air outlet, the height of the second rectangular air outlet is less than the length of the first rectangular air outlet, and the area of ​​the first rectangular air outlet is greater than the area of ​​the second rectangular air outlet.

[0011] Furthermore, the size of the lower mounting hole is larger than that of the second rectangular air outlet.

[0012] Furthermore, the size of the horn opening is larger than the size of the air outlet, so that the air outlet is projected onto the No. 3 plate.

[0013] The beneficial effects of the utility model: The honeycomb-shaped air outlets ensure that the airflow entering the chamber is stable and uniform, and that the airflow can evenly blow away and carry out the powder that splashes out of the chamber due to laser sintering at different locations. Attached Figure Description

[0014] Figure 1 A cross-sectional view of the air circulation system of a 3D printing apparatus provided for an embodiment of this application.

[0015] Figure 2 The image shows a cross-sectional view of the bottom wall, right side wall, air outlet, and flat tube of an air circulation system for a 3D printing device provided in an embodiment of this application.

[0016] Figure 3 This is a schematic diagram of the lower air inlet duct of an air circulation system for a 3D printing apparatus provided in an embodiment of this application.

[0017] Figure 4 A cross-sectional view of the air outlet of an air circulation system of a 3D printing apparatus provided for an embodiment of this application.

[0018] The markings in the diagram are as follows: 1. Molded box body; 100. Through hole; 2. Upper air inlet pipe; 3. Lower air inlet pipe; 4. Suction pipe; 31. Air outlet; 32. Flat pipe; 33. Bend pipe; 34. Connecting pipe; 300. Air outlet hole; 301. Chamfer; 311. Air outlet body; 312. Plate No. 1; 101. Lower mounting hole; 102. Left mounting hole; 41. Plate No. 3; 42. Guide cylinder; 43. Pipe No. 3; 410. Flow channel No. 3; 420. Trumpet opening; 11. Top wall; 12. Left side wall; 13. Right side wall; 14. Bottom wall; 321. Rectangular air outlet No. 1; 322. Rectangular air outlet No. 2. Detailed Implementation

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0020] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the air circulation system of a 3D printing device provided in the embodiment of this application includes a housing 1. The housing 1 includes a bottom wall 14, a left side wall 12, a right side wall 13, a front side wall, a rear side wall and a top wall 11 disposed on the bottom wall 14. A through hole 100 is provided on the bottom wall 14. The right side wall 13 is provided with an upper air inlet pipe 2 and a lower air inlet pipe 3 arranged vertically. The left side wall 12 is provided with a suction pipe 4. The right side wall 13 is provided with a lower mounting hole 101. The lower air inlet pipe 3 includes an air outlet 31 provided on the inner wall of the right side wall 13 and an air supply pipe provided on the outer wall of the right side wall 13. The air outlet 31 is provided with a plurality of air outlet holes 300 distributed in a honeycomb pattern and communicating with the lower mounting hole 101. The air supply pipe includes a connecting pipe 34, a bend pipe 33 communicating with the air outlet side of the connecting pipe 34, and a flat pipe 32 connected to the air outlet side of the bend pipe 33. The flat pipe 32 is communicating with the lower mounting hole 101. Both ends of the air outlet hole 300 are chamfered 301.

[0021] It should be noted that the substrate of the 3D printing device extends into the molding box 1 from below through the through hole 100. During the printing process, one end of the external fan is connected to the air intake side of the upper air inlet and the lower air inlet through the pipe, and the other end of the fan is connected to the air outlet side of the suction pipe 4 through the pipe, thereby forming an airflow circulation system to carry away the powder after the product is formed by laser sintering from the molding box 1.

[0022] During 3D printing, airflow from the upper air inlet duct 2 and the lower air inlet duct 3 enters the housing 1 (the upper air inlet duct 2 blows air onto the upper half of the housing 1, and the lower air inlet duct 3 blows air onto the lower half of the housing 1), and is then extracted from the housing 1 along the suction duct 4. The airflow from the lower air inlet duct 3 flows along the connecting pipe 34 into the bend duct 33, then into the flat-mouth pipe 32, and subsequently into the lower mounting hole 101 before being blown out through several air outlets 300. When the upstream airflow enters the air outlet 31, due to the characteristics of the fan, the bending of the pipe, and wall friction, its velocity and pressure distribution is almost impossible to be completely uniform. Some areas have high airflow velocity, while others have low airflow velocity. When the airflow enters the air outlet 300, the airflow from the supply duct may contain various vortices and turbulence. The honeycomb-shaped air outlets 300 of this application divide a large airflow into numerous independent, fine, high-speed jets, forcibly disrupting the original large-scale non-uniform structure and lateral flow. Each air outlet 300 strictly defines the outflow direction of the airflow. Regardless of the angle at which the airflow approaches the inlet of the small hole, it will be forcibly "aligned" and ejected vertically from the hole. This eliminates the chaotic airflow direction from upstream, making the airflow more uniform when entering the housing 1, ensuring that the airflow promptly carries away the splashed powder inside the housing 1. At the same time, the airflow from the upper air inlet duct 2 can blow on the upper part of the housing 1, avoiding the instability of the airflow inside the housing 1 caused by only the lower air inlet duct 3 blowing.

[0023] The above design ensures that the airflow entering the chamber 1 is stable and uniform, and that the airflow can uniformly blow away and carry out the powder that splashes out of the chamber 1 due to laser sintering at different locations of the chamber 1.

[0024] Specifically: such as Figure 4 As shown, the air outlet 31 includes an air outlet body 311 and a first plate 312 disposed on the air outlet body 311. A plurality of air outlet holes 300 are disposed on the air outlet body 311. The first plate 312 is sealed to the right side wall 13.

[0025] During actual assembly, the entire air outlet 31 is fixed on the right side wall 13 by connecting the No. 1 plate 312 to the right side wall 13. After the airflow enters the lower mounting hole 101, it enters the housing 1 through the air outlet hole 300 of the air outlet body 311.

[0026] In the above design, the structural design and specific implementation of the air outlet 31 can effectively achieve connection with the right side wall 13.

[0027] Specifically: such as Figure 1As shown, a left mounting hole 102 is provided on the left side wall 12. The suction pipe 4 includes a No. 3 plate 41 provided on the inner side of the left side wall 12, a guide cylinder 42 provided on the inner side of the No. 3 plate 41, and a No. 3 pipe 43 provided on the outer side of the left side wall 12. Several horizontal No. 3 flow channels 410 are provided on the No. 3 plate 41. The two ends of the No. 3 flow channels 410 are respectively connected to the left mounting hole 102 and the guide cylinder 42. The No. 3 pipe 43 is connected to the left mounting hole 102.

[0028] In actual use, an external exhaust fan draws air from the suction pipe 4, causing the airflow inside the housing 1 to enter the third flow channel 410 along the guide cylinder 42, then enter the left mounting hole 102, and finally enter the third pipe 43. When the airflow enters the left mounting hole 102 from the guide cylinder 42, it passes through the third flow channel 410. Due to the large number of third flow channels 410 and their small diameter, the pressure of the airflow increases when it enters the third flow channel 410, resulting in an increased flow velocity.

[0029] In the above design, the structural design and specific implementation of the suction pipe 4 enable the airflow to increase the flow rate by utilizing the No. 3 flow channel 410 when the airflow flows out of the box 1.

[0030] Specifically: such as Figure 1 As shown, one end of the guide cylinder 42 is connected to the left mounting hole 102, and the other end of the guide cylinder 42 is configured as a horn opening 420.

[0031] In actual use, the airflow inside the housing 1 enters the guide tube 42 through the horn opening 420.

[0032] In the above design, the design of the horn opening 420 can ensure that the opening of the guide tube 42 is as large as possible, so that the airflow of the adsorption guide tube 42 is as large as possible.

[0033] Specifically: such as Figure 1 and Figure 3 As shown, the flat-mouth pipe 32 includes a first rectangular air outlet 321 that connects to the bend pipe 33 and a second rectangular air outlet 322 that communicates with the lower mounting hole 101. The length of the second rectangular air outlet 322 is greater than the length of the first rectangular air outlet 321, the height of the second rectangular air outlet 322 is less than the length of the first rectangular air outlet 321, and the area of ​​the first rectangular air outlet 321 is greater than the area of ​​the second rectangular air outlet 322.

[0034] In actual use, the airflow enters the flat-mouth pipe 32 through the first rectangular vent 321 and then exits through the second rectangular vent 322. Due to the curvature of the bend 33, the airflow direction within the bend 33 is unstable and the velocity is uneven. After entering the flat-mouth pipe 32, as the airflow flows towards the second rectangular vent 322, the cross-sectional size of the flat-mouth pipe 32 gradually decreases, causing the airflow velocity within the flat-mouth pipe 32 to gradually increase and the flow direction to become more concentrated.

[0035] In the above design, the structure of the flat-mouth tube 32 makes the airflow gradually stabilize before flowing into the lower mounting hole 101.

[0036] Specifically: such as Figure 1 As shown, the size of the lower mounting hole 101 is larger than that of the second rectangular air outlet 322.

[0037] In the above design, the airflow enters the lower mounting hole 101 through the second rectangular air outlet 322, and then enters the air outlet 31 through the lower mounting hole 101. The size of the lower mounting hole 101 is larger than the size of the second rectangular air outlet 322, so that the airflow from the second rectangular air outlet 322 can completely enter the lower mounting hole 101.

[0038] Specifically: such as Figure 1 As shown, the size of the horn opening 420 is larger than the size of the air outlet 31, so that the air outlet 31 is projected onto the third plate 41.

[0039] In actual use, the airflow from the outlet 31 enters the suction pipe 4 through the horn opening 420.

[0040] In the above design, the size of the horn opening 420 is larger than the size of the air outlet 31, so that the air outlet 31 projected onto the No. 3 plate 41 can ensure that the airflow from the air outlet 31 flows completely into the air intake pipe 4 along the horn opening 420.

[0041] In further detail, it should be understood that the above description is only a specific embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wind circulation system for a 3D printing device, comprising a housing (1), the housing (1) comprising a bottom wall (14), a left side wall (12), a right side wall (13), a front side wall, a rear side wall, and a top wall (11) disposed on the bottom wall (14), wherein the bottom wall (14) is provided with a through hole (100), characterized in that: The right side wall (13) is provided with an upper air inlet pipe (2) and a lower air inlet pipe (3) arranged vertically. The left side wall (12) is provided with a suction pipe (4). The right side wall (13) is provided with a lower mounting hole (101). The lower air inlet pipe (3) includes an air outlet (31) provided on the inner wall of the right side wall (13) and an air supply pipe provided on the outer wall of the right side wall (13). The air outlet (31) is provided with a number of air outlet holes (300) distributed in a honeycomb pattern and communicating with the lower mounting hole (101). The air supply pipe includes a connecting pipe (34), a bend pipe (33) communicating with the air outlet side of the connecting pipe (34), and a flat pipe (32) connected with the air outlet side of the bend pipe (33). The flat pipe (32) is communicating with the lower mounting hole (101). Both ends of the air outlet hole (300) are chamfered (301).

2. The air circulation system of the 3D printing device according to claim 1, characterized in that: The air outlet (31) includes an air outlet body (311) and a first plate (312) disposed on the air outlet body (311). A plurality of air outlet holes (300) are disposed on the air outlet body (311). The first plate (312) is sealed to the right side wall (13).

3. The air circulation system of the 3D printing device according to claim 1, characterized in that: The left side wall (12) is provided with a left mounting hole (102). The suction pipe (4) includes a No. 3 plate (41) provided on the inner side of the left side wall (12), a guide cylinder (42) provided on the inner side of the No. 3 plate (41), and a No. 3 pipe (43) provided on the outer side of the left side wall (12). The No. 3 plate (41) is provided with several horizontal No. 3 flow channels (410). The two ends of the No. 3 flow channels (410) are respectively connected to the left mounting hole (102) and the guide cylinder (42). The No. 3 pipe (43) is connected to the left mounting hole (102).

4. The air circulation system of the 3D printing device according to claim 3, characterized in that: One end of the guide tube (42) is connected to the air outlet (300), and the other end of the guide tube (42) is configured as a horn opening (420).

5. The air circulation system of the 3D printing device of claim 1, wherein: The flat-mouth pipe (32) includes a first rectangular air outlet (321) that connects to the bend pipe (33) and a second rectangular air outlet (322) that communicates with the lower mounting hole (101). The length of the second rectangular air outlet (322) is greater than the length of the first rectangular air outlet (321), the height of the second rectangular air outlet (322) is less than the length of the first rectangular air outlet (321), and the area of ​​the first rectangular air outlet (321) is greater than the area of ​​the second rectangular air outlet (322).

6. The air circulation system of the 3D printing device of claim 1, wherein: The size of the lower mounting hole (101) is larger than that of the second rectangular air outlet (322).

7. The air circulation system of the 3D printing device according to claim 4, characterized in that: The size of the horn opening (420) is larger than the size of the air outlet (31), so that the air outlet (31) is projected onto the third plate (41).

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