Powder bag processing system and powder bag processing method for additive manufacturing

Abstract

The invention discloses a powder bag processing system for additive manufacturing. The powder bag processing system comprises a transfer container (100) and a powder removing device (300), the transfer container comprises a container body (10) and an insertion plate (20). The container main body comprises a body part (11) and a mouth part (13). A container mouth (15) is formed in the mouth portion. And the container opening can completely cover the opening of the forming barrel. And after the container opening is in butt joint with the opening of the forming barrel, the printed powder bag in the forming barrel can be translated into the body part. The insertion plate is connected with the opening part in a pluggable mode so that the container opening can be closed and opened. The powder removing device comprises a supporting body (30) and a rotatable screen drum (40). And one end of the screen drum is a feeding end (41). The feeding end is provided with a feeding port (42). The transfer container can be inserted into the screen drum through the feeding port, and in the inserted state, the body part is inserted into the screen drum. The system is simple in structure and convenient to operate, and powder bag processing efficiency can be improved. In addition, the invention further provides a powder bag processing method.

Description

Technical Field

[0001] The present invention relates to the field of additive manufacturing, and particularly to a powder package processing system and a powder package processing method for additive manufacturing. Background Art

[0002] Selective laser sintering forming is an additive manufacturing technology that uses a laser to sinter powder materials and bond them together to form a solid structure.

[0003] In the selective laser sintering forming process, the laser sintering operation is completed in a laser sintering device, and the printed part obtained after sintering is present in a powder package in a forming barrel. Currently, in the powder package processing operation, an operator needs to transfer the forming barrel containing the powder package from the laser sintering device to a powder removing device, and then unload the powder package in the forming barrel to the powder removing device for powder removal. The operation is complex and the efficiency is low. Summary of the Invention

[0004] The object of the present invention is to provide a powder package processing system for additive manufacturing, which is conducive to improving the powder package processing efficiency.

[0005] Another object of the present invention is to provide a powder package processing method for additive manufacturing, which is conducive to improving the powder package processing efficiency.

[0006] The present invention provides a powder package processing system for additive manufacturing, which includes a transfer container and a powder removing device. The transfer container includes a container main body and a plug board. The container main body includes a body part and a mouth part. The mouth part forms a container opening of the container main body. The container opening is arranged to be able to completely cover the opening of the forming barrel. The body part is arranged such that after the container opening is docked with the opening of the forming barrel, the printed powder package in the forming barrel can be translated into the body part from the forming barrel. The plug board is detachably connected to the mouth part to be able to close and open the container opening through the insertion and removal of the plug board. The powder removing device includes a support main body and a sieve cylinder rotatably arranged on the support main body. The barrel wall of the sieve cylinder has sieve holes allowing the powder to pass through. One end of the sieve cylinder along its rotation axis is a feeding end. The feeding end has a feeding port. The transfer container can be inserted into the sieve cylinder through the feeding port, and in the inserted state, the body part of the container main body is inserted into the sieve cylinder.

[0007] The powder package processing system has a simple structure and is convenient to operate. During the process of using it for powder package processing, there is no need to move the forming barrel, which is conducive to improving the powder package processing efficiency.

[0008] In another schematic embodiment of the powder package processing system for additive manufacturing, the outer shape of the body part is a non-cylindrical column. The shape of the feeding port matches the cross-section of the body part, so that when the transfer container is inserted into the sieve cylinder, the rotating sieve cylinder can drive the transfer container to rotate synchronously. This can facilitate the operation.

[0009] In yet another schematic embodiment of the powder package processing system for additive manufacturing, the support body includes a powder collecting shell. The powder collecting shell encloses a powder collecting cavity and has an installation opening. The sieve cylinder is disposed in the powder collecting cavity. The feeding port is opposite to the installation opening, and a clearance fit is formed between the feeding end and the edge of the powder collecting shell surrounding the installation opening. This facilitates powder recovery.

[0010] In yet another schematic embodiment of the powder package processing system for additive manufacturing, the other end of the sieve cylinder along its rotation axis is rotatably connected to the powder collecting shell. The powder collecting shell includes a support member. The feeding end is cylindrical. The support member fits along the circumferential direction of the feeding end to the outer peripheral surface of the feeding end and can support the feeding end. During the rotation of the sieve cylinder, the feeding end can slide against the support member. This helps to improve the stability during operation.

[0011] In yet another schematic embodiment of the powder package processing system for additive manufacturing, the support body further includes a powder cleaning shell. The powder cleaning shell covers the installation opening and encloses a powder cleaning cavity. The powder cleaning shell is provided with an operation opening opposite to the installation opening. This facilitates the removal of residual powder on the surface of the printed product.

[0012] In yet another schematic embodiment of the powder package processing system for additive manufacturing, the powder cleaning shell further has a negative pressure cavity communicating with the powder cleaning cavity. The negative pressure cavity is used to communicate with a negative pressure fan. The powder cleaning shell is provided with a first communication port between the negative pressure cavity and the powder cleaning cavity. The powder package processing system further includes a filtering module disposed at the first communication port to prevent powder from entering the negative pressure cavity from the powder cleaning cavity. This reduces the probability of the powder floating in the powder cleaning cavity escaping through the operation opening.

[0013] In yet another schematic embodiment of the powder package processing system for additive manufacturing, the powder cleaning shell has an operation table surface facing the powder cleaning cavity and extending to the powder collecting shell. The powder collecting shell is provided with a second communication port communicating the powder cleaning cavity and the powder collecting cavity at the edge of the operation table surface. The powder collecting shell is further provided with a flipable baffle. The baffle can block and open the second communication port by rotation. This facilitates powder recovery.

[0014] The present invention also provides a powder package processing method for additive manufacturing. The powder package processing method uses the transfer container of the above-mentioned powder package processing system. The powder package processing method includes: after the laser sintering process is completed, placing the container body with the inserted plate removed on the sintering platform of the laser sintering equipment so that the container opening is docked with the opening of the forming barrel; moving up the movable bottom plate of the forming barrel so that the printed powder package in the forming barrel passes through the container opening into the container body; inserting the inserted plate into the container body to close the container opening. This powder package processing method is simple to operate and does not require moving the forming barrel during the process, which helps to improve the powder package processing efficiency.

[0015] The present invention also provides another method for processing powder packages in additive manufacturing, and this powder package processing method uses the above-mentioned powder package processing system. The powder package processing method includes: after the laser sintering process is completed, placing the container body with the inserted plate removed on the sintering platform of the laser sintering equipment, so that the container opening is docked with the opening of the forming barrel; moving up the movable bottom plate of the forming barrel, so that the printed powder package in the forming barrel passes through the container opening and enters the container body; inserting the inserted plate into the container body to close the container opening; moving the transfer container out of the laser sintering equipment; opening a part of the container wall of the body of the transfer container to form a discharge port; inserting the transfer container into the sieve cylinder of the powder removing device through the feed port; rotating the transfer container so that the powder packages contained in the transfer container are poured into the sieve cylinder through the discharge port; removing the transfer container from the sieve cylinder; and continuing to rotate the sieve cylinder to remove the powder in the sieve cylinder. This powder package processing method is simple to operate and does not require moving the forming barrel during the process, which is beneficial to improving the powder package processing efficiency.

[0016] In another schematic embodiment of the method for processing powder packages in additive manufacturing, the sieve cylinder is rotated to drive the transfer container to rotate, so that the powder packages contained in the transfer container are poured into the sieve cylinder through the discharge port. This facilitates the operation.

[0017] In still another schematic embodiment of the method for processing powder packages in additive manufacturing, the powder package processing method further includes: taking out the printed product in the sieve cylinder to the powder cleaning chamber and removing the residual powder on the surface of the printed product in the powder cleaning chamber. This facilitates removing the residual powder on the surface of the printed product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings only schematically illustrate and explain the present invention and do not limit the scope of the present invention.

[0019] Figure 1 It is a schematic cross-sectional structure diagram of an embodiment of the powder package processing system for additive manufacturing.

[0020] Figure 2 For Figure 1 It is a schematic cross-sectional structure diagram of the disassembled state of the powder package processing system shown.

[0021] Figure 3 For Figure 1 It is a schematic three-dimensional structure diagram of the disassembled state of the powder package processing system shown.

[0022] Figure 4 For Figure 1 It is a front view schematic diagram of the powder removing device shown.

[0023] Figure 5 It is a schematic cross-sectional structure diagram of the powder removing device of another schematic embodiment of the powder package processing system.

[0024] Figure 6 For along Figure 5Schematic cross-sectional view along VI-VI

[0025] Figure 7 and Figure 8 A schematic implementation for explaining the powder package processing method of additive manufacturing

[0026] Reference numeral description 100 Transfer container 10 Container body 11 Body part 113 Discharge opening 13 Mouth part 15 Container opening 20 Plug board 300 Powder removal device 30 Support body 31 Powder collection shell 311 Powder collection cavity 312 Installation opening 313 Support member 315 Second communication opening 317 Baffle 35 Powder cleaning shell 351 Powder cleaning cavity 353 Operation opening 355 Negative pressure cavity 357 First communication opening 359 Operation table 40 Sieve cylinder 41 Feed end 42 Feed opening 50 Filter module 70 Powder package 71 Printed product 400 Laser sintering equipment 80 Molding barrel 81 Opening 82 Movable bottom plate 90 Sintering platform L Axis of rotation Detailed implementation manners

[0027] For a clearer understanding of the technical features, objectives, and effects of the invention, the detailed implementation manners of the invention are now described with reference to the accompanying drawings. Components with the same reference numerals in the figures represent components with the same or similar structures but the same functions

[0028] In this document, "schematic" means "serving as an example, instance, or illustration", and any illustration or implementation manner described as "schematic" in this document should not be construed as a more preferred or advantageous technical solution

[0029] In this document, terms such as "first" and "second" do not indicate their importance or order, etc., but are only used to indicate the differences from each other for the convenience of document description.

[0030] To simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product.

[0031] Figure 1 It is a schematic cross-sectional structure diagram of a schematic implementation manner of a powder package processing system for additive manufacturing. Figure 2 For Figure 1 It is a schematic cross-sectional structure diagram of the disassembled state of the powder package processing system shown. Figure 3 For Figure 1 It is a schematic three-dimensional structure diagram of the disassembled state of the powder package processing system shown. Among them, the additive manufacturing applicable to this powder package processing system is, for example but not limited to, selective laser sintering forming.

[0032] As Figures 1 to 3 shown, the powder package processing system includes a transfer container 100 and a powder removal device 300. The transfer container 100 includes a container main body 10 and a plug board 20. The container main body 10 includes a body part 11 and a mouth part 13 (see Figure 2 ). As Figure 2 shown, in this schematic implementation manner, the mouth part 13 is the part with a flange formed at the left end, and the body part 11 is the columnar part on the right side of the flange.

[0033] The mouth part 13 forms a container opening 15 of the container main body 10. The container opening 15 is arranged to be able to completely cover the opening of the forming barrel. The body part 11 is arranged so that after the container opening 15 is docked with the opening of the forming barrel, the printed powder package in the forming barrel can be translated from the forming barrel into the body part 11 under the push of the movable bottom plate of the forming barrel. The plug board 20 is detachably connected to the mouth part 13 to be able to close and open the container opening 15 through the insertion and removal of the plug board 20.

[0034] The powder removal device 300 includes a support main body 30 and a sieve cylinder 40. The sieve cylinder 40 is rotatably arranged on the support main body 30 around the rotation axis L. The cylinder wall of the sieve cylinder 40 has sieve holes allowing powder to pass through. One end of the sieve cylinder 40 along its rotation axis ( Figure 1 and Figure 2 the left end in) is a feeding end 41. The feeding end 41 has a feeding port 42. The transfer container 100 can be plugged into the sieve cylinder 40 through the feeding port 42 ( Figure 1 in the state where the transfer container 100 is plugged into the sieve cylinder 40), and in the plugged state, the body part 11 of the container main body 10 is inserted into the sieve cylinder 40.

[0035] The following describes a schematic usage scenario of the powder packet processing system. After the laser sintering process is completed, place the container body 10 with the inserted plate 20 removed on the sintering platform of the laser sintering equipment, so that the container opening 15 is docked with the opening of the forming barrel; move the movable bottom plate of the forming barrel upward, so that the printed powder packet in the forming barrel passes through the container opening 15 and enters the container body 10; insert the inserted plate 20 into the container body 10 to close the container opening 15; move the transfer container 100 out of the laser sintering equipment; open a part of the container wall of the body 11 of the transfer container 100 to form a discharge opening; insert the transfer container 100 into the sieve cylinder 40 of the powder removing device 300 through the feed inlet 42; rotate the transfer container 100 so that the powder packets contained in the transfer container 100 are poured into the sieve cylinder 40 through the discharge opening; remove the transfer container 100 from the sieve cylinder 40; continue to rotate the sieve cylinder 40 to remove the powder in the sieve cylinder 40, and the printed products remain in the sieve cylinder 40.

[0036] The powder packet processing system has a simple structure and is convenient to operate. During the process of using it to process powder packets, there is no need to move the forming barrel, which is beneficial to improving the powder packet processing efficiency.

[0037] As Figure 1 shown, when the transfer container 100 is inserted into the sieve cylinder 40, the transfer container 100 can, for example, close the feed inlet 42. In this way, during the process of pouring the powder packets in the transfer container into the sieve cylinder, dust can be prevented from overflowing from the feed inlet 42.

[0038] As Figure 3 shown, in the schematic embodiment, the outer shape of the body 11 is a non-cylindrical column, specifically, for example, a cubic shape. The shape of the feed inlet 42 matches the cross-section of the body 11, specifically, for example, a square shape. When the transfer container 100 is inserted into the sieve cylinder 40, the rotating sieve cylinder 40 can drive the transfer container 100 to rotate synchronously. In this way, the discharge can be completed by driving the transfer container 100 to rotate synchronously by rotating the sieve cylinder 40, which can facilitate the operation.

[0039] As Figure 1 and Figure 2 shown, in the schematic embodiment, the support body 30 includes a powder collecting shell 31. The powder collecting shell 31 encloses a powder collecting cavity 311 and has an installation opening 312. The sieve cylinder 40 is arranged in the powder collecting cavity 311. The feed inlet 42 is opposite to the installation opening 312, and the feed end 41 forms a clearance fit with the edge of the powder collecting shell 31 around the installation opening 312 to prevent powder from escaping from the gap between the two. This can facilitate the powder recovery. In Figure 1 and Figure 2 the lower end of the powder collecting shell 31 is, for example, also provided with a powder discharge port (not marked in the figure) for discharging powder.

[0040] As Figure 1 and Figure 2As shown, in the illustrative embodiment, the other end of the sieve cylinder 40 along its rotation axis (i.e., Figure 1 and Figure 2 the right end in) is rotatably connected to the powder collecting shell 31. The powder collecting shell 31 includes two support members. The support members are located within the powder collecting cavity 311. Figure 4 is Figure 1 a front view schematic diagram of the powder removing device shown, and its viewing angle is parallel to the rotation axis L. As Figure 4 shown, the feeding end 41 is cylindrical. The support member 313 fits along the circumferential direction of the feeding end 41 to the outer peripheral surface of the feeding end 41 and can support the feeding end 41. During the rotation of the sieve cylinder 40, the feeding end 41 can slide against the support member 313. This helps to improve the stability during operation. The surface of the support member 313 for supporting the feeding end 41 is, for example, made of steel wool, and the pores of the steel wool can accommodate lubricating oil, which helps to reduce the frictional loss between the support member 313 and the feeding end 41.

[0041] Figure 5 is a cross-sectional structural schematic diagram of the powder removing device of another illustrative embodiment of the powder bag processing system. Figure 6 is along Figure 5 the cross-sectional schematic diagram of VI-VI in. The powder bag processing system of this illustrative embodiment is the same as or similar to the powder bag processing system Figure 1 shown, and the same or similar parts will not be elaborated here. The differences are as follows. As Figure 5 and Figure 6 shown, the support main body 30 further includes a powder cleaning shell 35. The powder cleaning shell 35 covers the installation opening 312 and encloses a powder cleaning cavity 351. The powder cleaning shell 35 is provided with an operation opening 353 opposite to the installation opening 312. During use, for example, the printed matter remaining in the sieve cylinder 40 can be taken out into the powder cleaning cavity 351, and the residual powder on the surface of the printed matter can be removed in the powder cleaning cavity 351. This can facilitate the removal of the residual powder on the surface of the printed matter.

[0042] As Figure 6 shown, in the illustrative embodiment, the powder cleaning shell 35 further has two negative pressure cavities 355 communicating with the powder cleaning cavity 351. The powder cleaning shell 35 is provided with a first communication port 357 between the negative pressure cavity 355 and the powder cleaning cavity 351. The powder bag processing system further includes a filtering module 50 disposed at the first communication port 357 to prevent the powder from entering the negative pressure cavity 355 from the powder cleaning cavity 351. The negative pressure cavity 355 is used to communicate with a negative pressure fan to create a negative pressure environment in the powder cleaning cavity 351. This reduces the probability of the powder floating in the powder cleaning cavity 351 escaping from the operation opening 353. The filtering module 50 can be, for example, an existing product that can perform powder filtering, such as but not limited to a filter mesh.

[0043] As Figure 5As shown, in the illustrative embodiment, the purifying powder housing 35 has an operating table surface 359 that faces the purifying powder chamber 351 and extends to the powder collecting housing 31. The powder in the purifying powder chamber 351 finally falls onto the operating table surface 359, for example, under the action of gravity. The powder collecting housing 31 is provided with a second communication port 315 that communicates the purifying powder chamber 351 and the powder collecting chamber 311 at the edge of the operating table surface 359. The powder collecting housing 31 is further provided with a rotatable baffle 317. The baffle 317 can rotate to block and open the second communication port 315 ( Figure 5 In the figure, the baffle 317 is in a state of opening the second communication port 315). Thereby, the powder on the operating table surface 359 can be recycled into the powder collecting chamber 311 through the second communication port 315. In the normal state, the baffle 317 is in a state of blocking the second communication port 315 to prevent the powder in the powder collecting chamber 311 from entering the purifying powder chamber 351. Only when it is necessary to recycle the powder on the operating table surface 359 into the powder collecting chamber 311, the baffle 317 will be rotated to the state of opening the second communication port 315. Thereby, it is convenient for powder recycling.

[0044] Figure 7 and Figure 8 An illustrative embodiment for explaining a method for processing a powder package in additive manufacturing is provided. This powder package processing method uses Figure 5 the powder package processing system shown. The powder package processing method includes the following steps 1-8.

[0045] Step 1: After the laser sintering process is completed, place the container body 10 with the plug plate 20 removed on the sintering platform 90 of the laser sintering device 400 (the sintering platform 90 is used for powder spreading and laser sintering during the laser sintering forming process, and the forming barrel 80 below it is used to accommodate the powder package 70 formed during the laser sintering process, and the powder package 70 embeds the printed product 71), and align the container opening 15 with the opening 81 of the forming barrel 80 (as Figure 7 shown by A and B in the figure).

[0046] Step 2: Move the movable bottom plate 82 of the forming barrel 80 upward so that the printed powder package 70 in the forming barrel 80 passes through the container opening 15 and enters the container body 10 (as Figure 7 shown by C in the figure).

[0047] Step 3: Insert the plug plate 20 into the container body 10 to close the container opening 15 (as Figure 7 shown by D in the figure). Thus, the packaging process of the powder package 70 is completed. This process is simple to operate and does not require moving the forming barrel during the process, which is beneficial to improving the powder package processing efficiency.

[0048] Step 4: Move the transfer container 100 out of the laser sintering device 400.

[0049] Step 5: As Figure 8In A, a part of the container wall of the body 11 of the transfer container 100 is opened to form a discharge opening 113, and the transfer container 100 is inserted into the sieve cylinder 40 of the powder removing device 300 through the feed opening 42 (in the figure, the discharge opening 113 is located on the upper side wall of the body 11). Opening the container wall can be achieved, for example, by tearing / cutting a part of the body 11 or by using a detachable wall panel of the body 11.

[0050] Step 6: Drive the transfer container 100 to rotate by rotating the sieve cylinder 40, so that the powder packets 70 contained in the transfer container 100 are poured into the sieve cylinder 40 through the discharge opening 113. As Figure 8 shown, the sieve cylinder 40 rotates 180 degrees from the state shown in A to the state shown in B to achieve discharging.

[0051] Step 7: Remove the transfer container 100 from the sieve cylinder 40 and continue to rotate the sieve cylinder 40 to remove the powder in the sieve cylinder 40 (as Figure 8 shown in C). During the rotation of the sieve cylinder 40, for example, the feed opening 42 can be blocked with a plate, a curtain, etc. to prevent dust from overflowing.

[0052] Step 8: Take out the printed matter 71 in the sieve cylinder 40 to the powder cleaning chamber 351 and remove the residual powder on the surface of the printed matter 71 in the powder cleaning chamber 351 (as Figure 8 shown in D).

[0053] If the powder packet processing system shown in Figure 1 is adopted, the above step 8 needs to be completed on other equipment.

[0054] [[ID=2)3]]This powder packet processing method is simple to operate and does not require moving the molding barrel during the process, which is beneficial to improving the powder packet processing efficiency.

[0055] It should be understood that although this specification is described according to each embodiment, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0056] The series of detailed descriptions listed above are only specific descriptions of the feasible embodiments of the present invention, and they are not used to limit the protection scope of the present invention. Any equivalent implementation or change made without departing from the technical spirit of the present invention, such as the combination, division or repetition of features, should be included in the protection scope of the present invention.

Claims

1. Powder package processing system for additive manufacturing, characterized in that Comprising: A transfer container (100), which includes a container body (10) and a plug board (20). The container body (10) includes a body part (11) and a mouth part (13). The mouth part (13) forms a container opening (15) of the container body (10). The container opening (15) is arranged to be able to completely cover the opening of the forming barrel. The body part (11) is arranged such that after the container opening (15) is docked with the opening of the forming barrel, the printed powder packets in the forming barrel can be translated into the body part (11). The plug board (20) is detachably connected to the mouth part (13) to be able to close and open the container opening (15) through the insertion and extraction of the plug board (20); and A powder removal device (300), which includes a support body (30) and a sieve cylinder (40) rotatably arranged on the support body (30). The barrel wall of the sieve cylinder (40) has sieve holes allowing powder to pass through. One end of the sieve cylinder (40) along its rotation axis is a feeding end (41), and the feeding end (41) has a feeding port (42). The transfer container (100) can be inserted into the sieve cylinder (40) through the feeding port (42). And in the inserted state, the body part (11) of the container body (10) is inserted into the sieve cylinder (40).

2. The powder package processing system for additive manufacturing according to claim 1, characterized in that, The outer shape of the body part (11) is a non-cylindrical column, and the shape of the feeding port (42) matches the cross-section of the body part (11) so that when the transfer container (100) is inserted into the sieve cylinder (40), the rotating sieve cylinder (40) can drive the transfer container (100) to rotate synchronously.

3. The powder package processing system for additive manufacturing according to claim 1, wherein, The support body (30) includes a powder collecting shell (31). The powder collecting shell (31) encloses a powder collecting cavity (311) and has an installation opening (312). The sieve cylinder (40) is arranged in the powder collecting cavity (311). The feeding port (42) is opposite to the installation opening (312), and the feeding end (41) forms a clearance fit with the edge of the powder collecting shell (31) around the installation opening (312).

4. The powder package processing system for additive manufacturing according to claim 3, characterized in that, The other end of the sieve cylinder (40) along its rotation axis is rotatably connected to the powder collecting shell (31). The powder collecting shell (31) includes a support member (313). The feeding end (41) is cylindrical. The support member (313) fits along the circumferential direction of the feeding end (41) to the outer peripheral surface of the feeding end (41) and can support the feeding end (41). During the rotation of the sieve cylinder (40), the feeding end (41) can slide against the support member (313).

5. The powder package processing system for additive manufacturing according to claim 3, wherein, The support body (30) further includes a powder cleaning shell (35). The powder cleaning shell (35) covers the installation opening (312) and encloses a powder cleaning cavity (351). The powder cleaning shell (35) is provided with an operation opening (353) opposite to the installation opening (312).

6. The powder package processing system for additive manufacturing according to claim 5, wherein, The purifying shell (35) further has a negative pressure chamber (355) communicating with the purifying chamber (351). The negative pressure chamber (355) is used to communicate with a negative pressure fan. The purifying shell (35) is provided with a first communication port (357) between the negative pressure chamber (355) and the purifying chamber (351). The powder package processing system further includes a filtering module (50) disposed at the first communication port (357) to prevent powder from entering the negative pressure chamber (355) from the purifying chamber (351).

7. The powder package processing system for additive manufacturing according to claim 5, characterized in that, The purifying shell (35) has an operating table surface (359) facing the purifying chamber (351) and extending to the powder collecting shell (31). The powder collecting shell (31) is provided with a second communication port (315) communicating the purifying chamber (351) and the powder collecting chamber (311) at the edge of the operating table surface (359). The powder collecting shell (31) is further provided with a flip - up baffle (317), and the baffle (317) can block and open the second communication port (315) by rotation.

8. Powder package processing method for additive manufacturing, characterized in that, The powder package processing method uses a transfer container (100) of the powder package processing system as described in any one of claims 1 - 7. The powder package processing method includes: After the laser sintering process is completed, placing the container body (10) from which the plug board (20) has been removed on the sintering platform (90) of the laser sintering equipment, and docking the container opening (15) with the opening (81) of the forming barrel (80); Moving up the movable bottom plate (82) of the forming barrel (80) to enable the printed powder package (70) in the forming barrel (80) to pass through the container opening (15) and enter the container body (10); and Inserting the plug board (20) into the container body (10) to close the container opening (15).

9. Method for processing powder packets in additive manufacturing, characterized in that, The powder package processing method uses the powder package processing system as described in any one of claims 1 - 7. The powder package processing method includes: After the laser sintering process is completed, placing the container body (10) from which the plug board (20) has been removed on the sintering platform (90) of the laser sintering equipment, and docking the container opening (15) with the opening (81) of the forming barrel (80); Moving up the movable bottom plate (82) of the forming barrel (80) to enable the printed powder package (70) in the forming barrel (80) to pass through the container opening (15) and enter the container body (10); Inserting the plug board (20) into the container body (10) to close the container opening (15); Removing the transfer container (100) from the laser sintering equipment; Opening a part of the container wall of the body portion (11) of the transfer container (100) to form a discharge port (113); Inserting the transfer container (100) through the feed port (�2) into the sieve cylinder (40) of the powder removing device (300); Rotating the transfer container (100) to pour the powder package (70) contained in the transfer container (100) into the sieve cylinder (40) through the discharge port (113); Removing the transfer container (100) from the sieve cylinder (40); and Continue to rotate the sieve cylinder (40) to remove the powder in the sieve cylinder (40).

10. The powder pack processing method for additive manufacturing according to claim 9, wherein It further includes the steps of taking out the printed matter in the sieve cylinder (40) to the powder cleaning chamber (351) and removing the residual powder on the surface of the printed matter in the powder cleaning chamber (351).

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