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CN-121973443-A - Powder processing system and powder processing method for additive manufacturing

CN121973443ACN 121973443 ACN121973443 ACN 121973443ACN-121973443-A

Abstract

The powder processing system for additive manufacturing comprises a frame body (10), an old powder barrel (20), a powder mixing barrel (30), a blower (40), a first cyclone separator (71), a second cyclone separator (72) and an operation hose (50). The frame body is provided with a powder cleaning cavity (12). The discharge hole (713) of the first cyclone separator is connected with the old powder barrel, and the air outlet (715) is connected with the blower through a pipeline and a second valve. The discharge port of the second cyclone separator is connected with the powder mixing barrel, the air outlet of the second cyclone separator is connected with the air blower through a pipeline and a third valve, the inlet of the second cyclone separator is connected with the old powder barrel, and the inlet of the second cyclone separator can be connected with the new powder barrel through a fourth valve. One end of the operation hose is connected with an inlet (712) of the first cyclone separator, and the other end of the operation hose can freely move in the powder cleaning cavity. The powder treatment system can avoid powder leakage. A powder treatment process is also provided.

Inventors

  • ZHAO LUAN
  • HE DESHENG
  • CHEN SONGSEN

Assignees

  • 上海盈普三维打印科技有限公司

Dates

Publication Date
20260505
Application Date
20260212

Claims (12)

  1. 1. Powder processing system of additive manufacturing, characterized by comprising: A frame body (10) which is provided with a powder cleaning cavity (12) for placing a powder bag; an old powder bucket (20) for storing old powder, an outlet of the old powder bucket (20) being provided with a first valve (91); a mixing tub (30) for mixing old powder and new powder; a blower (40) for extracting air; The discharge hole (713) of the first cyclone separator (71) is connected with the old powder barrel (20), and the air outlet (715) of the first cyclone separator (71) is connected with the blower (40) through a pipeline and a second valve (92); A second cyclone separator (72) with a discharge port connected with the powder mixing barrel (30), an air outlet of the second cyclone separator (72) is connected with the blower (40) through a pipeline and a third valve (93), an inlet of the second cyclone separator (72) is connected with the old powder barrel (20), and an inlet of the second cyclone separator (72) can be connected with a new powder barrel through a fourth valve (94), and An operation hose (50) having one end connected to an inlet (712) of the first cyclone (71), and the other end of the operation hose (50) being freely movable in the dust removing chamber (12).
  2. 2. Additive manufactured powder handling system according to claim 1, characterized in that the powder handling system further comprises an electric vibrating screen device (80), the electric vibrating screen device (80) being connected to the first valve (91) by a pipe, the old powder in the old powder tank (20) being able to fall under gravity into the electric vibrating screen device (80) in the open state of the first valve (91), the inlet of the second cyclone separator (72) being connected to the outlet of the electric vibrating screen device (80) by a pipe.
  3. 3. The additive manufacturing powder handling system of claim 2, wherein the first valve (91), the second valve (92), the third valve (93), and the fourth valve (94) are pneumatic normally closed butterfly valves, and wherein the powder handling system further comprises a control module (90), the control module (90) configured to control the first valve (91), the second valve (92), the third valve (93), and the fourth valve (94).
  4. 4. A additive manufactured powder treatment system as set forth in claim 3, further comprising: a first weighing module (22) which is provided to the frame (10) and is capable of generating first weight information from the weight of the old powder container (20), and A second weighing module (32) which is provided to the frame body (10) and is capable of generating second weight information according to the weight of the powder mixing barrel (30); The control module (90) is configured to be able to open the blower (40) according to a start-up instruction, to open the second valve (92) according to a powder suction instruction, to open the third valve (93) according to a powder mixing instruction, to control the first valve (91) and the electric vibrating screen device (80) according to a preset old powder weight, the first weight information and the second weight information, and to control the fourth valve (94) according to a preset new powder weight and the second weight information.
  5. 5. The additive manufacturing powder processing system of claim 4, further comprising a touch screen (99), wherein the touch screen (99) is disposed on the frame (10) and is in signal connection with the control module (90), the touch screen (99) is configured to send the start command, the powder suction command, and the powder mixing command to the control module (90), and the touch screen (99) is further configured to display and modify the old powder weight and the new powder weight.
  6. 6. A powder treatment system for additive manufacturing according to claim 3, wherein the electric vibrating screen device (80) comprises: a housing (82) formed with an interior cavity; A screen (84) arranged in the inner cavity and dividing the inner cavity into an upper cavity (821) and a lower cavity (822), old powder in the upper cavity (821) can enter the lower cavity (822) through the screen (84), the upper cavity (821) is connected with the old powder barrel (20) through a pipeline, an outlet of the electric vibrating screen device (80) is positioned in the lower cavity (822), and A first powder level sensor (86) disposed in the lower cavity (822) and configured to generate a first position signal when old powder in the lower cavity (822) is deposited on top, the control module (90) being configured to receive the first position signal and to control the first valve (91) to close in accordance with the first position signal.
  7. 7. The additive manufactured powder handling system of claim 6, wherein the electric vibrating screen further comprises a second powder level sensor (88), the second powder level sensor (88) being disposed in the upper chamber (821) and being capable of generating a second position signal when old powder in the upper chamber (821) is deposited on top, the control module (90) being configured to receive the second position signal, control the first valve (91) to close in accordance with the second position signal, while the control module (90) further generates an alarm signal.
  8. 8. The additive manufactured powder treatment system of claim 2, further comprising: An external powder bucket (24) for storing old powder, and The discharge port of the third cyclone separator (73) is connected with the external powder barrel (24), the air outlet of the third cyclone separator (73) is connected with the air blower (40) through a pipeline and a fifth valve (95), and the inlet of the third cyclone separator (73) is connected with the discharge port of the electric vibrating screen device (80).
  9. 9. The additive manufactured powder treatment system of claim 1, further comprising: -a filter vat (61) having an inlet and an outlet, the outlet of the filter vat (61) being connected to the inlet of the blower (40); a filter (62) that is provided in the filter tank (61) and that is capable of filtering powder that has passed through the filter tank (61); dust collection barrel (63), and And a discharge port of the fourth cyclone separator (74) is connected with the dust collection barrel (63), an air outlet of the fourth cyclone separator (74) is connected with an inlet of the filter barrel (61) through a pipeline, and air outlets of the first cyclone separator (71) and the second cyclone separator (72) are connected with an inlet of the fourth cyclone separator (74).
  10. 10. The additive manufacturing powder treatment system of claim 1, further comprising a fifth cyclone (75), wherein a discharge port of the fifth cyclone (75) is connectable to a powder adding barrel of an additive manufacturing apparatus, wherein an air outlet of the fifth cyclone (75) is connected to the blower (40) via a pipe and a sixth valve (96), and wherein an inlet of the fifth cyclone (75) is connected to an outlet of the powder mixing barrel (30) via a pipe.
  11. 11. A powder treatment method of additive manufacturing, characterized in that the powder treatment method uses a powder treatment system according to any one of claims 1 to 10, the powder treatment method comprising: -activating the blower (40); -closing the first valve (91), the third valve (93) and the fourth valve (94), opening the second valve (92); operating the operating hose (50) to suck old powder in the powder cleaning cavity (12) into the old powder barrel (20); Closing the second valve (92) and the fourth valve (94), opening the first valve (91) and the third valve (93), and sucking old powder in the old powder bucket (20) into the powder mixing bucket (30); Closing the first valve (91) and the second valve (92), opening the third valve (93) and the fourth valve (94), sucking the fresh powder in the fresh powder tank into the powder mixing tank (30), and And starting a powder mixing barrel (30) to mix the old powder and the new powder.
  12. 12. A powder treatment method of additive manufacturing, characterized in that the powder treatment method uses a powder treatment system according to any one of claims 2 to 8, the powder treatment method comprising: -activating the blower (40); -closing the first valve (91), the third valve (93) and the fourth valve (94), opening the second valve (92); operating the operating hose (50) to suck old powder in the powder cleaning cavity (12) into the old powder barrel (20); closing the second valve (92) and the fourth valve (94), opening the first valve (91) and the third valve (93), starting the electric vibrating screen device (80), and sucking old powder in the electric vibrating screen device (80) into the powder mixing barrel (30); Closing the first valve (91) and the second valve (92), opening the third valve (93) and the fourth valve (94), sucking the fresh powder in the fresh powder tank into the powder mixing tank (30), and And starting a powder mixing barrel (30) to mix the old powder and the new powder.

Description

Powder processing system and powder processing method for additive manufacturing Technical Field The invention relates to the field of additive manufacturing, in particular to a powder processing system and a powder processing method for additive manufacturing. Background In powder bed melting additive manufacturing processes such as Selective Laser Sintering (SLS) or Selective Laser Melting (SLM), a large amount of unsintered old powder remains in the forming barrel after printing is completed, and new powder needs to be supplemented for mixing and then reused. The existing powder treatment system needs manual operation for sieving and mixing powder, so that powder is exposed, and the risk of powder leakage exists. Disclosure of Invention The invention aims to provide a powder treatment system for additive manufacturing, which can avoid powder leakage. Another object of the present invention is to provide a powder treatment method for additive manufacturing, which can avoid powder leakage. The invention provides a powder treatment system for additive manufacturing, which comprises a frame body, an old powder barrel, a powder mixing barrel, a blower, a first cyclone separator, a second cyclone separator and an operation hose. The frame body is provided with a powder cleaning cavity for placing the powder bag. The old powder bucket is used for storing old powder, and the outlet of the old powder bucket is provided with a first valve. The powder mixing barrel is used for mixing old powder and new powder. The blower is used for extracting air. The discharge port of the first cyclone separator is connected with the old powder barrel, and the air outlet of the first cyclone separator is connected with the air blower through a pipeline and a second valve. The discharge port of the second cyclone separator is connected with the powder mixing barrel, the air outlet of the second cyclone separator is connected with the air blower through a pipeline and a third valve, the inlet of the second cyclone separator is connected with the old powder barrel, and the inlet of the second cyclone separator can be connected with the new powder barrel through a fourth valve. One end of the operation hose is connected with the inlet of the first cyclone separator, and the other end of the operation hose can freely move in the powder cleaning cavity. The powder treatment system forms negative pressure in the first cyclone separator through a blower, collects old powder in the powder cleaning cavity by means of an operation hose and collects the old powder into an old powder barrel. The powder processing system also forms negative pressure in the second cyclone separator through the blower, and respectively conveys the old powder in the old powder barrel and the new powder in the new powder barrel to the powder mixing barrel for mixing, and the old powder and the new powder are kept in a closed space in a full range, so that powder leakage is avoided. In another exemplary embodiment of the additive manufacturing powder handling system, the powder handling system further comprises an electric vibrating screen device. The electric vibrating screen device is connected with the first valve through a pipeline, when the first valve is in an open state, old powder in the old powder barrel can fall into the electric vibrating screen device under the action of gravity, and an inlet of the second cyclone separator is connected with an outlet of the electric vibrating screen device through a pipeline. Therefore, the agglomerated old powder can be scattered, and the subsequent use is more convenient. In yet another exemplary embodiment of the additive manufacturing powder handling system, the first valve, the second valve, the third valve, and the fourth valve are pneumatic normally closed butterfly valves. The powder treatment system further includes a control module configured to control the first valve, the second valve, the third valve, and the fourth valve. Therefore, the powder treatment process can be automatically controlled, and the labor is saved. In yet another exemplary embodiment of the additive manufacturing powder handling system, the powder handling system further comprises a first weighing module and a second weighing module. The first weighing module is arranged on the frame body and can generate first weight information according to the weight of the old powder barrel. The second weighing module is arranged on the frame body and can generate second weight information according to the weight of the powder mixing barrel. The control module is configured to be capable of opening the blower according to the start instruction, opening the second valve according to the powder suction instruction, opening the third valve according to the powder mixing instruction, controlling the first valve and the electric vibrating screen device according to the preset old powder weight, the first weight information and the second weight informati