Powder cleaning cabin for 3D printed parts

Abstract

This utility model relates to the field of 3D printing technology and discloses a powder cleaning chamber for 3D printed parts, including: a cleaning chamber body, the cleaning chamber body having a cleaning cavity inside for cleaning powder adhering to the 3D printed parts, an argon gas delivery device installed inside the cleaning chamber body, the output end of the argon gas delivery device being connected to an argon gas delivery pipe for transporting inert gas, the argon gas delivery pipe extending towards the cleaning cavity and having a pipe winding assembly wrapped around its inner side. In this utility model, by setting a manually pullable blowing nozzle and pipe winding assembly, the operator can directly control the nozzle to target and blow away residual powder on the surface and inside of the 3D printed parts, thereby changing the rigid mode of existing equipment that only rotates and cleans according to a preset program, avoiding the problem that the equipment cannot detect residual powder and thus the cleaning is incomplete, effectively improving the thoroughness of powder cleaning.

Description

Technical Field

[0001] This utility model relates to the field of 3D printing technology, and in particular to a powder cleaning chamber for 3D printed parts. Background Technology

[0002] The powder cleaning chamber for 3D printed parts is a key piece of equipment in the post-processing stage of 3D printing, primarily used to remove residual powder material from the surface and interior of the 3D printed parts. In powder bed fusion 3D printing technologies such as selective laser sintering and metal laser melting, a large amount of unsintered powder adheres to the surface and pores of the printed parts after printing. The powder cleaning chamber is a specialized device designed to efficiently remove this powder. However, since the powder remaining on the surface and inside the 3D printed parts is mostly combustible dust, vibration and blowing operations during cleaning can easily cause the powder to be stirred up, forming a dust cloud. When the concentration reaches the explosive limit and encounters an ignition source such as electrostatic sparks or mechanical friction heat, an explosion may occur within the sealed cleaning chamber. Therefore, the safety of equipment and personnel must be ensured during the cleaning process.

[0003] In existing technologies, cleaning residual powder from the surface and interior of 3D printed parts typically involves fixing the 3D printed part to a rotating component, which then rotates the 3D printed part, causing the powder to fall off under gravity. This process is usually automated. However, the equipment can only operate according to its programmed settings. When powder remains on or inside the 3D printed part, the equipment cannot detect it. Even when the cleaning process is complete, the equipment stops operating, leaving powder residue on the surface of the 3D printed part. Even after the inert gas in the cleaning chamber is exhausted, the residual powder can still explode under certain conditions, posing a danger to the equipment and personnel.

[0004] Therefore, this application provides a powder cleaning chamber for 3D printed parts to meet the requirements. Utility Model Content

[0005] The technical problem to be solved by this invention is to provide a powder cleaning chamber for 3D printed parts to solve the problem that the existing equipment only rotates and cleans according to a preset program, which is rigid and cannot detect residual powder, resulting in incomplete cleaning.

[0006] To solve the problems mentioned above, this utility model is implemented through the following technical solution.

[0007] A powder cleaning chamber for 3D printed parts includes: a cleaning chamber body, an internal cleaning cavity for cleaning powder adhering to the 3D printed parts, an argon gas delivery device installed inside the cleaning chamber body, an argon gas delivery pipe connected to the output end of the argon gas delivery device for transporting inert gas, the argon gas delivery pipe extending towards the cleaning cavity and having a pipe winding assembly wound around its inner side, the pipe winding assembly being rotatably connected to the inner wall of the cleaning chamber body, one end of the argon gas delivery pipe away from the argon gas delivery device extending to the side of the pipe winding assembly near the cleaning cavity and continuing to extend into the cleaning cavity, and a purge nozzle fixedly connected to the portion of the argon gas delivery pipe located in the cleaning cavity.

[0008] Preferably, the pipe winding assembly includes an outer cylinder, an inner shaft, and a torsion spring. The axial end of the inner shaft is inserted into the outer cylinder, and the torsion spring is located between the outer side of the axial end of the inner shaft and the inner wall of the outer cylinder, so as to generate elastic force after deformation and drive the outer cylinder back to its original position.

[0009] Preferably, the sidewall of the purging nozzle extends outward to form a limiting protrusion.

[0010] Preferably, the main body of the cleaning chamber is provided with sealing doors on both sides and the top of the cleaning cavity, which are rotatably connected to the main body of the cleaning chamber and are used to seal the cleaning cavity. The two sealing doors on both sides of the cleaning cavity are provided with operating holes on their outer sides, which are used to assist the staff to put their hands into the cleaning cavity to perform operations.

[0011] Preferably, an explosion-proof valve assembly is fixedly connected to the top of the cleaning chamber body. The explosion-proof valve assembly includes an active explosion-proof valve and a passive explosion-proof valve, which are used to actively or passively open when the pressure of the medium inside the cleaning chamber is too high or exceeds a specified value, so as to protect the cleaning chamber and personnel safety.

[0012] Preferably, a plurality of argon gas filling devices are installed at the bottom of the inner wall of the cleaning chamber, and the argon gas filling devices are used to fill the cleaning chamber with argon gas.

[0013] Preferably, the cleaning chamber is equipped with two sets of oxygen content detectors, one upper and one lower, on its sidewall for detecting the oxygen content inside the cleaning chamber.

[0014] Preferably, the cleaning chamber body is provided with a power auxiliary cabinet and a hydraulic assembly on opposite sides, a rotating component is provided inside the cleaning chamber, a fixed platform is fixed on the top of the rotating component, the fixed platform is used to fix the 3D printed part, the hydraulic assembly includes a rotary hydraulic cylinder for driving the rotating component to rotate, and a hydraulic control station is installed on the same side of the cleaning chamber body as the hydraulic assembly, the hydraulic control station is used to provide power to the hydraulic equipment included in the hydraulic assembly and control the operation of the hydraulic assembly.

[0015] Preferably, a control panel is provided on the outside of the main body of the cleaning chamber, and a gas detection device is fixedly connected to the side wall of the control panel. The control panel is used for human-machine interaction.

[0016] This invention provides a powder cleaning chamber for 3D printed parts. Compared with the prior art, it has the following advantages:

[0017] 1. By setting up a manually pullable blow nozzle and pipe winding assembly, the operator can directly control the nozzle to target and blow away residual powder on the surface and inside of the 3D printed part. This changes the rigid mode of existing technology where the equipment only rotates and cleans according to a preset program, avoiding the problem that the equipment cannot detect residual powder and thus the cleaning is incomplete, effectively improving the thoroughness of powder cleaning.

[0018] 2. By installing an argon gas filling device, two sets of oxygen content detectors and explosion-proof valve components in the cleaning chamber, argon gas can be injected in real time to dilute the oxygen concentration, accurately monitor the oxygen content in the chamber, and actively or passively open the explosion-proof valve to release pressure when the pressure is too high. This constructs a complete explosion-proof safety system, avoiding the safety hazard of explosion caused by residual combustible powder, and comprehensively ensuring the safety of equipment operation and personnel operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the internal structure of the cleaning cavity of this utility model.

[0021] Figure 3 This is a side view of the present invention.

[0022] Figure 4 This utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0023] Figure 5 This is a schematic diagram of the overall side structure of this utility model.

[0024] Figure 6 This is a schematic diagram of the overall structure of the control panel of this utility model.

[0025] Figure 7 This is a schematic diagram of the connection structure of the argon gas delivery equipment, argon gas delivery pipeline, pipeline winding assembly and purging nozzle of this utility model.

[0026] Figure 8 This is a schematic diagram of the connection structure of the outer cylinder, inner shaft, and torsion spring of this utility model.

[0027] Figure 9 This is a schematic diagram of the connection structure between the purging nozzle and the limiting protrusion of this utility model.

[0028] The attached figures are labeled as follows:

[0029] 10. Cleaning chamber main body; 11. Cleaning cavity; 111. Rotating component; 12. Sealed door; 121. Operating port; 13. Fixed platform; 14. Explosion-proof valve assembly; 15. Oxygen content detector; 16. Argon filling device; 17. Power auxiliary cabinet; 18. Hydraulic assembly; 181. Hydraulic control station; 19. Control panel; 191. Gas detection device; 20. Argon conveying equipment; 21. Argon conveying pipeline; 22. Pipe winding assembly; 221. Outer cylinder; 222. Inner shaft; 223. Torsion spring; 23. Purge nozzle; 231. Limiting protrusion. Detailed Implementation

[0030] The present invention will be further described below with reference to specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0031] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0032] Example 1: Refer to Figures 1-5 , Figures 7-9 A powder cleaning chamber for 3D printed parts includes: a cleaning chamber body 10, a cleaning cavity 11 inside the cleaning chamber body 10 for cleaning powder adhering to the 3D printed parts, an argon gas delivery device 20 installed inside the cleaning chamber body 10, an argon gas delivery pipe 21 for transporting inert gas connected to the output end of the argon gas delivery device 20, the argon gas delivery pipe 21 extending towards the cleaning cavity 11 and having a pipe winding assembly 22 wound around its inner side, the pipe winding assembly 22 being rotatably connected to the inner wall of the cleaning chamber body 10, one end of the argon gas delivery pipe 21 away from the argon gas delivery device 20 extending to the side of the pipe winding assembly 22 near the cleaning cavity 11 and continuing to extend into the cleaning cavity 11, and a purge nozzle 23 being fixedly connected to the portion of the argon gas delivery pipe 21 located inside the cleaning cavity 11.

[0033] Furthermore, such as Figures 7 to 9 As shown, this allows the operator to directly pull the purge nozzle 23, moving the argon gas delivery pipe 21, which was originally wrapped around the pipe winding assembly 22, into the cleaning chamber 11. This allows the operator to directly clean the residual powder on the 3D printed part by aiming the purge nozzle 23 at the 3D printed part, avoiding the rigidity of the equipment cleaning and enhancing the cleaning effect.

[0034] The pipe winding assembly 22 includes an outer cylinder 221, an inner shaft 222, and a torsion spring 223. The axial end of the inner shaft 222 is inserted into the outer cylinder 221, and the torsion spring 223 is located between the outer side of the axial end of the inner shaft 222 and the inner wall of the outer cylinder 221. It is used to generate elastic force after deformation, so as to drive the outer cylinder 221 back to its original position.

[0035] Furthermore, such as Figure 8 As shown, when the argon gas delivery pipe 21 is in use, the outer cylinder 221 is driven to rotate, and the torsion spring 223 is deformed. When the argon gas delivery pipe 21 is not in use, it is driven by the torsion spring 223 to wrap around the outside of the pipe winding assembly 22, collecting the argon gas delivery pipe 21.

[0036] The sidewall of the purge nozzle 23 extends outward to form a limiting protrusion 231.

[0037] Furthermore, such as Figure 9 As shown, this prevents the purge nozzle 23 from being driven to the outside of the cleaning chamber 11 by the elastic action of the torsion spring 223, thus ensuring that the purge nozzle 23 is always located inside the cleaning chamber 11, making it easy for staff to access.

[0038] Working process and principle: The operator pulls the purge nozzle 23, which moves the argon gas delivery pipe 21 wrapped around the pipe winding assembly 22 into the cleaning chamber 11. The purge nozzle 23 is used to clean the residual powder on the 3D printed part. When in use, the outer cylinder 221 is driven to rotate, which deforms the torsion spring 223. When not in use, the elastic force generated by the deformation of the torsion spring 223 drives the outer cylinder 221 back to its original position, collecting the argon gas delivery pipe 21. This achieves flexible cleaning, avoids the rigid operation of equipment cleaning, and enhances the cleaning effect.

[0039] Example 2: Refer to Figures 1-6 The main body 10 of the cleaning chamber is provided with sealing doors 12 on both sides and top of the cleaning chamber 11, which are rotatably connected to the main body 10 of the cleaning chamber and are used to seal the cleaning chamber 11. The two sealing doors 12 on both sides of the cleaning chamber 11 are provided with operating holes 121 on the outside. The operating holes 121 are used to assist the staff to put their hands into the cleaning chamber 11 to operate.

[0040] Furthermore, such as Figure 1 As shown, this allows staff to transport 3D printed parts into the cleaning chamber 11 through multiple sealed doors 12. For example, 3D printed parts can be hoisted into the cleaning chamber 11 through the sealed door 12 at the top of the cleaning chamber 11. The sealed door 12 is also equipped with a transparent window for staff to observe and work. Staff can put their hands into the cleaning chamber 11 through the operation hole 121 to carry out certain dust cleaning work.

[0041] An explosion-proof valve assembly 14 is fixedly connected to the top of the cleaning chamber 11 on the main body 10 of the cleaning chamber. The explosion-proof valve assembly 14 includes an active explosion-proof valve and a passive explosion-proof valve, which are used to actively or passively open when the pressure of the medium inside the cleaning chamber 11 is too high or exceeds the specified value, so as to protect the cleaning chamber and personnel safety.

[0042] Furthermore, both active and passive explosion-proof valves are connected to pipes for venting gases to ensure the safety of the cleaning chamber in extreme situations.

[0043] Several argon gas filling devices 16 are installed at the bottom of the inner wall of the cleaning chamber 11. The argon gas filling devices 16 are used to fill the cleaning chamber 11 with argon gas.

[0044] Furthermore, since argon is an inert gas, filling the dust environment inside the cleaning chamber 11 with inert gas can destroy the necessary conditions for a dust explosion by diluting the oxygen concentration, isolating combustion-supporting conditions, and absorbing heat, thereby achieving explosion protection.

[0045] Two sets of oxygen content detectors 15 are installed on the side wall of the cleaning chamber 11 to detect the oxygen content in the cleaning chamber 11.

[0046] Furthermore, such as Figure 3 As shown, since argon gas has a greater mass than air, when argon gas enters the cleaning chamber 11 from the bottom, it moves up and down to compress the air originally in the cleaning chamber 11, causing it to move upwards and be discharged from the active explosion-proof valve of the explosion-proof valve assembly 14. This fills the cleaning chamber 11 with argon gas. When the argon gas moves to the top of the cleaning chamber 11, the oxygen concentration can be determined by the oxygen content detector 15 located above. When the argon gas is discharged, the oxygen concentration can be determined by the oxygen content detector 15 below, thus providing a comprehensive understanding of the oxygen and argon gas content within the cleaning chamber 11.

[0047] The main body 10 of the cleaning chamber is provided with a power auxiliary cabinet 17 and a hydraulic assembly 18 on opposite sides. A rotating component 111 is provided in the cleaning chamber 11. A fixed platform 13 is fixed on the top of the rotating component 111. The fixed platform 13 is used to fix the 3D printed part. The hydraulic assembly 18 includes a rotating hydraulic cylinder for driving the rotating component 111 to rotate. A hydraulic control station 181 is installed on the same side of the main body 10 of the cleaning chamber and the hydraulic assembly 18. The hydraulic control station 181 is used to provide power to the hydraulic equipment included in the hydraulic assembly 18 and control the operation of the hydraulic assembly 18.

[0048] Furthermore, such as Figures 1 to 5 As shown, the fixed platform 13 fixes the base of the 3D printed part and uses hydraulic transmission to achieve uniform rotation of the fixed platform 13. Combined with centrifugal force and airflow, the 3D printed part is swept to remove the powder attached to the 3D printed part.

[0049] A control panel 19 is installed on the outside of the main body 10 of the cleaning chamber. A gas detection device 191 is fixedly connected to the side wall of the control panel 19. The control panel 19 is used for human-machine interaction.

[0050] Furthermore, such as Figure 6 As shown, human-machine information interaction is achieved through the control panel 19, and parameters are set and status feedback is provided. At the same time, the gas detection device 191 detects the external gas content in real time to prevent argon gas leakage inside the cleaning chamber 11 and avoid harm to personnel.

[0051] Working Process and Principle: The 3D printed part is transported to the cleaning chamber 11 through the sealed door 12. The operator's hands are inserted into the cleaning chamber 11 through the operating port 121 to operate the parts. The hydraulic control station 181 controls the rotating hydraulic cylinder to rotate the rotating part 111, causing the 3D printed part fixed on the fixed platform 13 to rotate. At the same time, the argon gas filling device 16 fills the cleaning chamber 11 with argon gas. The upper and lower sets of oxygen content detectors 15 detect the oxygen content. The active explosion-proof valve has an exhaust function, expelling the air compressed upward by the argon gas. When the pressure of the medium inside the cleaning chamber 11 is too high or exceeds the specified value, the passive explosion-proof valve of the explosion-proof valve assembly 14 automatically opens, and the active explosion-proof valve can be opened by the operator. The control panel 19 enables human-machine interaction and detects the external gas content through the gas detection device 191. The hydraulic transmission drives the rotation of the printed part, combined with argon gas dilution, oxygen concentration explosion prevention, and real-time monitoring, to remove the printed part powder and ensure safety.

[0052] Therefore, although the present invention has been described herein with reference to specific embodiments thereof, freedom of modification, various changes and substitutions are also within the scope of the above disclosure, and it should be understood that in some cases, certain features of the present invention may be adopted without departing from the scope and spirit of the invention and without corresponding use of other features. Thus, many modifications can be made to adapt a particular environment or material to the essential scope and spirit of the present invention. The present invention is not intended to be limited to the specific terms used in the following claims and / or the specific embodiments disclosed as the best mode of carrying out the present invention, but the present invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Therefore, the scope of the present invention will be determined only by the appended claims.

Claims

1. A powder cleaning cabin for 3D printed pieces, characterized in that, include: The cleaning chamber body (10) has a cleaning cavity (11) inside for cleaning powder adhering to 3D printed parts. An argon gas delivery device (20) is installed inside the cleaning chamber body (10). The output end of the argon gas delivery device (20) is connected to an argon gas delivery pipe (21) for transporting inert gas. The argon gas delivery pipe (21) extends toward the cleaning cavity (11) and is wound with a pipe winding assembly (22) on its inner side. The pipe winding assembly (22) is rotatably connected to the inner wall of the cleaning chamber body (10). The end of the argon gas delivery pipe (21) away from the argon gas delivery device (20) extends to the side of the pipe winding assembly (22) near the cleaning cavity (11) and continues to extend into the cleaning cavity (11). The part of the argon gas delivery pipe (21) located in the cleaning cavity (11) is fixedly connected to a purge nozzle (23).

2. The powder purge chamber for 3D printed parts of claim 1, wherein, The pipe winding assembly (22) includes an outer cylinder (221), an inner shaft (222), and a torsion spring (223). The axial end of the inner shaft (222) is inserted into the outer cylinder (221), and the torsion spring (223) is located between the outer side of the axial end of the inner shaft (222) and the inner wall of the outer cylinder (221) to generate elastic force after deformation, thereby driving the outer cylinder (221) back to its original position.

3. The powder purge chamber for 3D printed parts of claim 1, wherein, The sidewall of the purge nozzle (23) extends outward to form a limiting protrusion (231).

4. The powder purge chamber for 3D printed parts of claim 1, wherein, The cleaning chamber body (10) is provided with sealing doors (12) on both sides and top of the cleaning cavity (11), which are rotatably connected to the cleaning chamber body (10) and used to seal the cleaning cavity (11). The two sealing doors (12) on both sides of the cleaning cavity (11) are provided with operating holes (121) on their outer sides. The operating holes (121) are used to assist the staff to put their hands into the cleaning cavity (11) for operation.

5. The powder purge chamber for 3D printed parts of claim 1, wherein, The cleaning chamber body (10) is fixedly connected to the top of the cleaning chamber (11) with an explosion-proof valve assembly (14). The explosion-proof valve assembly (14) includes an active explosion-proof valve and a passive explosion-proof valve, which are used to actively or passively open when the pressure of the medium inside the cleaning chamber (11) is too high or exceeds the specified value, so as to protect the cleaning chamber and personnel safety.

6. The powder purge chamber for 3D printed parts of claim 1, wherein, A plurality of argon gas filling devices (16) are installed at the bottom of the inner wall of the cleaning chamber (11), and the argon gas filling devices (16) are used to fill the cleaning chamber (11) with argon gas.

7. The powder cleaning chamber for 3D printed parts according to claim 1, characterized in that, The cleaning chamber (11) is equipped with two sets of oxygen content detectors (15) on its side wall, which are used to detect the oxygen content in the cleaning chamber (11).

8. The powder cleaning chamber for 3D printed parts according to claim 1, characterized in that, The cleaning chamber body (10) is provided with a power auxiliary cabinet (17) and a hydraulic assembly (18) on opposite sides respectively. A rotating component (111) is provided in the cleaning chamber (11). A fixed platform (13) is fixed on the top of the rotating component (111). The fixed platform (13) is used to fix the 3D printed part. The hydraulic assembly (18) includes a rotating hydraulic cylinder for driving the rotating component (111) to rotate. A hydraulic control station (181) is installed on the same side of the hydraulic assembly (18) on the cleaning chamber body (10). The hydraulic control station (181) is used to provide power to the hydraulic equipment included in the hydraulic assembly (18) and control the operation of the hydraulic assembly (18).

9. The powder cleaning chamber for 3D printed parts according to claim 1, characterized in that, A control panel (19) is provided on the outside of the main body (10) of the cleaning chamber. A gas detection device (191) is fixedly connected to the side wall of the control panel (19). The control panel (19) is used for human-machine interaction.

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