An automatic powder processing system for metal powder 3D printer

Abstract

The present invention provides an automatic powder processing system for a metal powder 3D printer, which belongs to the technical field of 3D printer auxiliary machines, and includes a box body, wherein a gas circulation purification system is installed inside the box body, and an automatic powder processing system is installed inside the box body, wherein the gas circulation purification system is used to circulate and filter the gas, process the inert gas containing smoke, and filter out the dust in the inert gas containing smoke so that the inert gas containing smoke can be reused. The present invention solves the problem that the prior art only lists screening components, does not mention feeding and conveying, material return, and gas circulation purification, and does not mention that after printing is completed, the powder that is not used for sintering other than the printed workpiece in the printer molding cylinder is sucked into the box body of the automatic processing system for screening and processing, and the powder and gas processing system are imperfect.

Description

Technical Field

[0001] The invention belongs to the technical field of 3D printer auxiliary machines, and in particular relates to an automatic powder processing system for a metal powder 3D printer. Background Art

[0002] Metal powder 3D printer processes the metal powder covering the upper surface of the forming cylinder layer by layer into metal parts through selective laser sintering. In recent years, it has been widely used in various industries such as scientific research, medical treatment, aerospace, etc. During the processing and use, the dried and sieved metal powder needs to be added to the printer silo. The excess metal powder and the metal powder that has not been sintered in the forming cylinder after printing need to be collected and sieved before being put into use. In addition, in order to prevent the metal powder from exploding, or the metal powder from polluting the environment and causing harm to people, or the environment from polluting the metal powder, it needs to be handled in a closed manner. At present, these tasks are usually completed manually, with high work intensity and low automation process. The degree is low. CN114918126A introduces a 3D printing powder conveying and screening machine and a circulation system for screening and reusing the powder generated by the printer. It only lists the screening components, and does not mention the feeding and conveying, the falling material return, and the gas circulation purification. It does not mention that after the printing is completed, the powder that is not used for sintering other than the printed workpiece in the printer molding cylinder is sucked into the box of the automatic processing system for screening and other work. The powder and gas processing systems are not perfect. Therefore, it is very necessary to develop a complete metal powder 3D printer powder automatic processing system with a gas circulation purification system and a powder automatic processing system. Summary of the invention

[0003] The present invention provides an automatic powder processing system for a metal powder 3D printer, which aims to solve the problem that the prior art only lists screening components, does not mention material feeding and conveying, material return, gas circulation and purification, and does not mention that after printing is completed, the powder that is not used for sintering other than the printed workpiece in the printer forming cylinder is sucked into the box of the automatic processing system for screening processing, etc., and the powder and gas processing system are imperfect.

[0004] The embodiment of the present invention provides a metal powder 3D printer powder automatic processing system, including a box body, a gas circulation purification system is installed inside the box body, and the powder automatic processing system is installed inside the box body, and the gas circulation purification system is used to circulate and filter the gas, process the inert gas containing smoke, filter out the dust in the inert gas containing smoke, and allow the inert gas containing smoke to be reused;

[0005] The automatic powder processing system is used to automatically transport the excess collected powder dropped from the printing chamber hopper to the automatic processing system for screening, and the sieved powder is automatically transported to the silo of the 3D printer to continue to be used by the printer for printing. It can also be used to suck the unsintered powder other than the printed workpiece in the printer forming cylinder into the automatic processing system after printing is completed, and screen it. The sieved powder is automatically transported to the silo of the 3D printer.

[0006] Furthermore, the gas circulation purification system includes a closed filter cartridge box, a cyclone dust collector, a gas circulation fan, a return air fan pipe, and an outlet air fan pipe. The closed filter cartridge box is installed on the inner bottom wall of the box body, a cyclone dust collector is installed on the side of the closed filter cartridge box, the side of the closed filter cartridge box is connected to the gas circulation fan, the side wall of the box body is installed with a return air fan pipe connected to the cyclone dust collector, and the air outlet of the gas circulation fan is connected to the outlet air fan pipe.

[0007] Furthermore, a filter cartridge is installed in the closed filter cartridge box, a closed connecting pipe is connected between the closed filter cartridge box and the cyclone dust collector, the air inlet of the gas circulation fan is connected to the fan air inlet pipe, the gas circulation fan is connected to the closed filter cartridge box through the fan air inlet pipe, the end of the air outlet pipe away from the gas circulation fan is connected to the printing cabin, the end of the fan air inlet pipe away from the gas circulation fan is connected to the closed filter cartridge box, and the bottom of the cyclone dust collector is connected to a dust collecting tank installed on the bottom wall of the box body.

[0008] Furthermore, the powder material automatic processing system includes a processing system fan, a blowing pipe 1, a blowing pipe 2, a return pipe 1, a return pipe 2, a feeding return pipe, a feeding feeding pipe, an internal material pipe, an automatic control valve, an upper waste material collection tank, an under-screen hopper, a vibrating screen, an internal blowing pipe 3, an air-solid separation filter cartridge, a pre-screen collection tank, an upper-screen material level sensor, and an under-screen material level sensor. The processing system fan is installed near the top of the box, and the air outlet of the processing system fan is connected to There are two blowing pipes, two return pipes are installed on the side wall of the box body, one end of the return pipe extends into the box body and is connected to a pre-screen aggregate tank installed inside the box body, a gas-solid separation filter cartridge is installed on the top of the pre-screen aggregate tank and is connected to the gas-solid separation filter cartridge, an upper screen material level sensor is installed on the pre-screen aggregate tank, a vibrating screen is installed below the pre-screen aggregate tank, a feed feeding pipe is installed on the top of the box body, a feed return air pipe is installed on the top of the box body, and the wind of the processing system The air outlet of the machine is connected with one end of a blowing pipe one, and the other end of the blowing pipe one extends into the interior of the printing cabin, a return pipe one is installed on the side wall of the box body, one end of the return pipe one is connected with the pre-screen collecting tank, and the other end of the return pipe one extends into the interior of the printing cabin, a screen hopper is installed at the bottom of the vibrating screen, and the bottom of the screen hopper is connected with an internal material pipe, an overscreen waste material collecting tank is installed on the inner bottom wall of the box body, and the overscreen waste material collecting tank is connected with a pipeline, and the overscreen waste material collecting tank is connected with the vibrating screen through the pipeline, and a manual valve is installed on the pipeline, and two underscreen material level sensors distributed up and down are installed in the underscreen hopper, and the bottom of the underscreen hopper is connected to one end of a conveying pipeline, and the other end of the conveying pipeline is connected to the internal material pipe. A number of automatic control valves are installed in the box body, and the air outlet of the processing system fan is connected to one end of an internal blowing pipe three, and the other end of the internal blowing pipe three is connected to the feeding pipe.

[0009] Furthermore, one end of the loading and feeding pipe away from the box body is connected to a printer material bin.

[0010] Furthermore, one end of the feeding return air pipe extending into the box is connected to the gas-solid separation filter cartridge, the other end of the feeding return air pipe is connected to the air inlet of the processing system fan, and the end of the blowing pipe away from the processing system fan extends into the lower end of the printer hopper.

[0011] Furthermore, one end of the internal material pipe away from the under-screen hopper is connected to the printer silo, the internal blowing pipe three is connected to the internal material pipe, and an electric valve is installed on the pre-screen collecting tank.

[0012] Furthermore, the air outlet of the treatment system fan is connected to one end of a ventilation pipeline 1, and the other end of the ventilation pipeline 1 is connected to a blowing pipe 1.

[0013] The beneficial effects of the present invention are:

[0014] 1. The present invention sucks in the inert gas containing smoke and dust through the return air fan pipe, and then the gas is inertially dusted by the cyclone dust collector to separate the coarse particles and fine particles. The fine particles are then filtered through the closed filter cartridge box to obtain clean inert gas, and then enter the working cavity of the printing cabin through the closed filter cartridge box, the gas circulation fan, and the outlet fan pipe to complete the circulation filtration of the gas.

[0015] 2. The present invention uses the processing system fan to bring excess powder into the pre-screen collecting tank through the return pipe 2, and then enters the vibrating screen for screening. The fine material under the screen is blown out from the air outlet of the processing system fan through the high-pressure wind of the internal blowing pipe 3 and blown out through the feeding pipe, driving the fine powder under the screen into the printer silo. The return air after gas-solid separation returns to the air inlet of the processing system fan through the feeding return pipe to complete automatic feeding.

[0016] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0018] Figure 1 It is a schematic diagram of the front structure of an embodiment of the present invention;

[0019] Figure 2 It is a schematic diagram of the rear structure of an embodiment of the present invention;

[0020] Figure numerals: 1. gas circulation purification system; 2. automatic powder processing system; 11. closed filter cartridge box; 12. cyclone dust collector; 13. gas circulation fan; 14. return air fan pipe; 15. exhaust air fan pipe; 201. processing system fan; 202. blowing pipe one; 204. return material pipe one; 203. blowing pipe two; 205. return material pipe two; 206. feeding return air pipe; 207. feeding feed pipe; 208. internal material pipe; 209. automatic control valve; 210. above-screen waste collection tank; 211. below-screen hopper; 212. vibrating screen; 213. internal blowing pipe three; 214. gas-solid separation filter cartridge; 215. pre-screen collection tank; 216. above-screen material level sensor; 217. below-screen material level sensor. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of specific embodiments of the present invention. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Reference Figure 1-2 The embodiment of the present invention provides an automatic powder processing system for a metal powder 3D printer, including a box body, a gas circulation purification system 1 is installed inside the box body, and an automatic powder processing system 2 is installed inside the box body. The gas circulation purification system 1 is used to circulate and filter the gas, process the inert gas containing smoke, filter out the dust in the inert gas containing smoke, and allow the inert gas containing smoke to be reused;

[0023] The automatic powder processing system 2 is used to automatically transport the excess collected powder falling from the printing chamber hopper to the automatic processing system for screening. The sieved powder is automatically transported to the silo of the 3D printer to continue to be used by the printer for printing. It can also be used to suck the unsintered powder other than the printed workpiece in the printer's forming cylinder into the automatic processing system after printing is completed for screening. The sieved powder is automatically transported to the silo of the 3D printer.

[0024] The gas circulation purification system 1 includes a closed filter cartridge box 11, a cyclone dust collector 12, a gas circulation fan 13, a return air fan pipe 14, and an outlet air fan pipe 15. The closed filter cartridge box 11 is installed on the inner bottom wall of the box body, and the cyclone dust collector 12 is installed on the side of the closed filter cartridge box 11. The side of the closed filter cartridge box 11 is connected to the gas circulation fan 13, and the side wall of the box body is installed with a return air fan pipe 14 connected to the cyclone dust collector 12, and the air outlet of the gas circulation fan 13 is connected to the outlet air fan pipe 15.

[0025] A filter cartridge is installed in the closed filter cartridge box 11, and a closed connecting pipe is connected between the closed filter cartridge box 11 and the cyclone dust collector 12. The air inlet of the gas circulation fan 13 is connected to the fan air inlet pipe. The gas circulation fan 13 is connected to the closed filter cartridge box 11 through the fan air inlet pipe. The end of the fan pipe 15 away from the gas circulation fan 13 is connected to the printing cabin, and the end of the fan air inlet pipe away from the gas circulation fan 13 is connected to the closed filter cartridge box 11. The bottom of the cyclone dust collector 12 is connected to a dust collecting tank installed on the bottom wall of the box body.

[0026] The automatic powder processing system 2 includes a processing system fan 201, a blowing pipe 1 202, a blowing pipe 203, a return pipe 1 204, a return pipe 205, a feeding return air pipe 206, a feeding feeding pipe 207, an internal material pipe 208, an automatic control valve 209, an upper waste material collection tank 210, an under-screen hopper 211, a vibrating screen 212, an internal blowing pipe 3 213, an air-solid separation filter cartridge 214, a pre-screen collection tank 215, an upper material level sensor 216, and an under-screen material level sensor 217. The processing system fan 201 is installed near the top of the box, and the air outlet of the processing system fan 201 is connected to the blowing pipe 203. The side wall of the box is installed There is a return pipe 205, one end of which extends into the box and is connected to a pre-screen aggregate tank 215 installed inside the box. A gas-solid separation filter cartridge 214 is installed on the top of the pre-screen aggregate tank 215 and is connected to the gas-solid separation filter cartridge 214. An upper screen material level sensor 216 is installed on the pre-screen aggregate tank 215. The upper screen material level sensor 216 is used to sense the position height of the material level, which is the upper limit material level position and the lower limit material level position. A vibrating screen 212 is installed below the pre-screen aggregate tank 215, a feed feeding pipe 207 is installed on the top of the box, a feed return air pipe 206 is installed on the top of the box, and the air outlet of the processing system fan 201 is connected to a blow pipe 202. The bottom of the vibrating screen 212 is provided with an under-screen hopper 211, which is used for temporarily storing the screened material, controlling and orderly conveying the material to the printer silo for use, and preventing the pipeline from being blocked by excessive amount or empty delivery without material. The bottom of the under-screen hopper 211 is connected with an internal material pipe 208, and an over-screen waste collection tank 210 is installed on the inner bottom wall of the box body. The over-screen waste collection tank 210 is connected with a pipeline, and the over-screen waste collection tank 210 is connected with a pipeline. The tank 210 is connected with the vibrating screen 212 through a pipeline, and a manual valve is installed on the pipeline. Two under-screen level sensors 217 distributed up and down are installed in the under-screen hopper 211. The bottom of the under-screen hopper 211 is connected to one end of the conveying pipeline, and the other end of the conveying pipeline is connected to the internal material pipe 208. The under-screen level sensor 217 is used to divide it into upper and lower material levels. When it reaches the upper material level, the conveying pipeline valve opens to start feeding, and when it reaches the lower limit, the feeding stops. A number of automatic control valves 209 are installed in the box body, and the air outlet of the processing system fan 201 is connected to one end of the internal blowing pipe three 213, and the other end of the internal blowing pipe three 213 is connected to the upper material feeding pipe 207.

[0027] One end of the feeding pipe 207 away from the box body is connected to the printer material bin.

[0028] Furthermore, one end of the feeding return air pipe 206 extending into the box is connected to the gas-solid separation filter cartridge 214, and the other end of the feeding return air pipe 206 is connected to the air inlet of the processing system fan 201, and the end of the blowing pipe 203 away from the processing system fan 201 extends into the lower end of the printer hopper.

[0029] Furthermore, one end of the internal material pipe 208 away from the under-screen hopper 211 is connected to the printer silo, the internal blowing pipe 3 213 is connected to the internal material pipe 208, and an electric valve is installed on the pre-screen collecting tank 215.

[0030] The air outlet of the processing system fan 201 is connected to one end of the ventilation pipeline 1, and the other end of the ventilation pipeline 1 is connected to the blowing pipe 1 202.

[0031] The automatic control valves 209 are respectively installed on the pipelines in the box, and the automatic control valves 209 are used to control the on-off of each pipeline to achieve the on-off of gas and powder conveying.

[0032] The specific implementation method is as follows: when in use, the inert gas containing smoke and dust in the printing chamber is sucked in by the return fan pipe 14, and the inert gas containing smoke and dust is inertially dusted through the cyclone dust collector 12 at the front end of the closed filter cartridge box 11, and the coarse dust particles fall into the dust collecting tank below the front cyclone dust collector 12, and the fine dust particles enter the closed filter cartridge box 11 through the closed connecting pipe above the cyclone dust collector 12. After being filtered by the high-precision filter cartridge, the clean inert gas enters the gas circulation fan 13 through the fan air inlet pipe from the closed filter cartridge box 11, and then enters the working chamber of the printing cabin from the gas circulation fan 13 through the fan outlet pipe 15, completing the circulation filtration of the gas;

[0033] The excess powder dropped from the hopper in the printing chamber is automatically collected by the automatic powder processing system 2, and the processing system fan 201 is used as the power source. The dropped powder is blown out by the high-pressure wind from the air outlet of the processing system fan 201 through the blowing pipe 203 of the dropped material to the lower end of the printer hopper. The blown powder is brought into the pre-screen collection tank 215 through the return pipe 205 of the dropped material. The gas is filtered by the gas-solid separation filter cartridge 214 and then returns to the air outlet of the processing system fan 201. The pre-screen collection tank 215 is There is a screen level sensor 216 on 15. When the powder exceeds the upper limit, the electric valve on the pre-screen collecting tank 215 opens, and the powder enters the vibrating screen 212 for screening. The fine powder under the screen is blown out from the air outlet of the processing system fan 201 and driven by the high-pressure wind of the internal blowing pipe 213 to be blown out through the feeding pipe 207, driving the fine powder under the screen into the printer silo. The return air after gas-solid separation returns to the air inlet of the processing system fan 201 through the feeding return pipe 206, completing automatic feeding.

[0034] When printing is completed, the high-pressure wind blown by the processing system fan 201 circulates in the ventilation pipeline and then blown out through the blowing pipe 202 for suction. At the pipe mouth of the blowing pipe 202 in the printing cabin, negative pressure suction is generated, and the flowing inert gas flow drives the sucked powder to be brought into the pre-screen collecting tank 215 through the return pipe 204 for suction. The gas returns to the air inlet of the processing system fan 201 through the gas-solid separation filter cartridge 214. There is an above-screen material level sensor 216 on the pre-screen collecting tank 215. When the powder exceeds the upper limit, the electric valve on the pre-screen collecting tank 215 opens, and the powder enters the vibrating screen 212 for screening, and then automatically reciprocates and works.

[0035] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A metal powder 3D printer powder automatic processing system, comprising a box, characterized in that: A gas circulation purification system (1) is installed inside the box, and an automatic powder processing system (2) is installed inside the box. The gas circulation purification system (1) is used to circulate and filter the gas, process the inert gas containing smoke, filter out the smoke in the inert gas containing smoke, and allow the filtered clean inert gas to be passed into the printing cabin for circulation; The powder automatic processing system (2) is used to automatically convey the excess powder collected from the hopper of the printing chamber to the automatic processing system for screening, and the screened powder is automatically conveyed to the material bin of the 3D printer to continue to be used by the printer for printing, and can be used to suck the powder other than the printed workpiece in the printer molding cylinder and send it to the automatic processing system after printing is completed, and screen it, and the screened powder is automatically conveyed to the material bin of the 3D printer; The powder material automatic processing system (2) comprises a processing system fan (201), a first blowing pipe (202), a second blowing pipe (203), a first return pipe (204), a second return pipe (205), a feed return pipe (206), a feed feeding pipe (207), an internal material pipe (208), an automatic control valve (209), an upper waste material collection tank (210), an under-screen hopper (211), a vibrating screen (212), a third internal blowing pipe (213), an air-solid separation filter cartridge (214), a pre-screen collection tank (215), an upper material level sensor (216), and an under-screen material level sensor (217). The processing system fan (201) is installed near the top of the housing. 01), the air outlet of the processing system fan (201) is connected to a second blowing pipe (203), a second return pipe (205) is installed on the side wall of the box body, one end of the second return pipe (205) extends into the box body and is connected to a pre-screen aggregate tank (215) installed inside the box body, a gas-solid separation filter cartridge (214) is installed on the top of the pre-screen aggregate tank (215) and is in communication with the gas-solid separation filter cartridge (214), an upper screen material level sensor (216) is installed on the pre-screen aggregate tank (215), a vibrating screen (212) is installed below the pre-screen aggregate tank (215), a feeding pipe (207) is installed on the top of the box body, and a There is a feeding return air pipe (206), the air outlet of the processing system fan (201) is connected to one end of the blowing pipe (202), the other end of the blowing pipe (202) extends into the interior of the printing chamber, the side wall of the box body is installed with a return pipe (204), one end of the return pipe (204) is connected to the pre-screen collection tank (215), the other end of the return pipe (204) extends into the interior of the printing chamber, the bottom of the vibrating screen (212) is installed with an under-screen hopper (211), the bottom of the under-screen hopper (211) is connected to an internal material pipe (208), the inner bottom wall of the box body is installed with an over-screen waste collection tank (210), the over-screen waste collection tank (215) The tank (210) is connected to a pipeline, the above-screen waste material collection tank (210) is connected to the vibrating screen (212) through the pipeline, a manual valve is installed on the pipeline, two above-below-screen material level sensors (217) are installed in the below-screen hopper (211), the bottom of the below-screen hopper (211) is connected to one end of a conveying pipeline, the other end of the conveying pipeline is connected to an internal material pipe (208), a plurality of automatic control valves (209) are installed in the box, the air outlet of the processing system fan (201) is connected to one end of an internal blowing pipe (213), the other end of the internal blowing pipe (213) is connected to a feeding pipe (207); The excess powder dropped from the hopper of the printing chamber is automatically collected by the automatic powder processing system (2). The fan (201) of the processing system is used as a power source. The dropped powder is blown out by high-pressure air from the air outlet of the fan (201) of the processing system through the second blowing pipe (203) of the dropping material to the lower end of the printer hopper. The blown powder is brought into the pre-screening collection tank (215) through the second return pipe (205) of the dropping material. The gas is filtered by the gas-solid separation filter cartridge (214) and then returned to the air outlet of the fan (201) of the processing system. The pre-screening collection tank (215) is 15) is provided with a screen level sensor (216). When the powder exceeds the upper limit, the electric valve on the pre-screen collecting tank (215) opens, and the powder enters the vibrating screen (212) for screening. The fine powder under the screen is blown out from the air outlet of the processing system fan (201) through the high-pressure air of the internal blowing pipe 3 (213) and blown out through the feeding pipe (207), driving the fine powder under the screen into the printer silo. The return air after gas-solid separation returns to the air inlet of the processing system fan (201) through the feeding return pipe (206), completing automatic feeding. When printing is completed, the high-pressure air blown out by the processing system fan (201) circulates in the ventilation pipe 1 and is then blown out through the blowing pipe 1 (202) for suction. Negative pressure suction is generated at the pipe mouth of the blowing pipe 1 (202) in the printing chamber. The flowing inert gas flow drives the sucked powder and is brought into the pre-screening collection tank (215) through the return pipe 1 (204) for suction. The gas returns to the air inlet of the processing system fan (201) through the gas-solid separation filter cartridge (214). The pre-screening collection tank (215) is provided with an upper screen level sensor (216). When the powder exceeds the upper limit, the electric valve on the pre-screening collection tank (215) opens, and the powder enters the vibrating screen (212) for screening, and then automatically reciprocates in a cycle.

2. The metal powder 3D printer powder automatic processing system according to claim 1 is characterized by: The gas circulation purification system (1) comprises a sealed filter cartridge box (11), a cyclone dust removal cylinder (12), a gas circulation fan (13), a return air fan pipe (14), and an outlet air fan pipe (15); the sealed filter cartridge box (11) is mounted on the inner bottom wall of a box body; a cyclone dust removal cylinder (12) is mounted on the side of the sealed filter cartridge box (11); the side of the sealed filter cartridge box (11) is connected to the gas circulation fan (13); a return air fan pipe (14) connected to the cyclone dust removal cylinder (12) is mounted on the side wall of the box body; and the outlet air fan pipe (15) is connected to the gas circulation fan (13).

3. The metal powder 3D printer powder automatic processing system according to claim 2 is characterized by: A filter cartridge is installed in the sealed filter cartridge box (11); a sealed connecting pipe is connected between the sealed filter cartridge box (11) and the cyclone dust collector (12); an air inlet of the gas circulation fan (13) is connected to a fan air inlet pipe; the gas circulation fan (13) is connected to the sealed filter cartridge box (11) through the fan air inlet pipe; an end of the fan outlet pipe (15) away from the gas circulation fan (13) is connected to the printing cabin; an end of the fan air inlet pipe away from the gas circulation fan (13) is connected to the sealed filter cartridge box (11); and the bottom of the cyclone dust collector (12) is connected to a dust collecting tank installed on the bottom wall of the box body.

4. The automatic powder processing system for a metal powder 3D printer according to claim 1 is characterized by: One end of the loading and feeding pipe (207) away from the box body is connected to the printer material bin.

5. The metal powder 3D printer powder automatic processing system according to claim 1, characterized in that: One end of the feeding return air pipe (206) extending into the box body is connected to the gas-solid separation filter cartridge (214), and the other end of the feeding return air pipe (206) is connected to the air inlet of the processing system fan (201); and one end of the blowing pipe 2 (203) away from the processing system fan (201) extends into the lower end of the printer hopper.

6. The metal powder 3D printer powder automatic processing system according to claim 1, characterized in that: One end of the internal material pipe (208) away from the under-screen hopper (211) is connected to the printer silo, the internal air blowing pipe 3 (213) is connected to the internal material pipe (208), and an electric valve is installed on the pre-screen collecting tank (215).

7. The metal powder 3D printer powder automatic processing system according to claim 1 is characterized by: The air outlet of the treatment system fan (201) is connected to one end of a ventilation pipeline 1, and the other end of the ventilation pipeline 1 is connected to a blowing pipe 1 (202).

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