WO2021112385A1 - 3d 프린터용 금속분말 제조장치 - Google Patents
3d 프린터용 금속분말 제조장치 Download PDFInfo
- Publication number
- WO2021112385A1 WO2021112385A1 PCT/KR2020/013645 KR2020013645W WO2021112385A1 WO 2021112385 A1 WO2021112385 A1 WO 2021112385A1 KR 2020013645 W KR2020013645 W KR 2020013645W WO 2021112385 A1 WO2021112385 A1 WO 2021112385A1
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- WIPO (PCT)
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- powder
- nozzle block
- spray nozzle
- metal powder
- chamber
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y70/00—Materials specially adapted for additive manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/0848—Melting process before atomisation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
- B22F2009/0896—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid particle transport, separation: process and apparatus
Definitions
- the present invention relates to an apparatus for manufacturing a metal powder used in a 3D printer, and more particularly, a metal powder for a 3D printer that is based on arc spraying, has a sphericity of 95% or more, and has a uniform powder size of 20 to 30 microns. It relates to a metal powder manufacturing apparatus for a 3D printer capable of manufacturing
- metal powder for 3D printers has a sphericity of 90% or more, and has a powder size distribution from several tens of microns to several hundreds of microns. And the powder surface should not be oxidized and should have a uniform powder size.
- These metal powders mainly use specific metal powders such as Stainless, Titanium, Inconel, etc.
- the 3D printing method is a Powder Bed Fusion method, and the main application fields are medical, aircraft and education fields.
- metal powders for 3D printers are mainly manufactured by gas spraying.
- the metal is melted in a crucible equipped with a nozzle in the upper chamber and the upper chamber is pressurized, the molten metal is sprayed through the nozzle into the chamber in a vacuum atmosphere located at the lower part. At this time, the refrigerant is sprayed around the nozzle and solidified. manufacture of metal powder.
- the metal powder produced in this way has a spherical shape, and the surface of the metal powder has a clean state.
- the recovery rate of metal powder that satisfies the size distribution of metal powder which is the standard of metal powder for 3D printing, is difficult to exceed 30% or more, so the price rises rapidly, and it is not suitable for small-volume, multi-variety production.
- Korean Patent Registration No. 10-1421244 proposes a spherical metal powder for a 3D printer through plasma treatment of a prismatic metal powder after mechanical pulverization, which is another method among metal powder manufacturing methods.
- the present invention is suitable for small quantity production of various types based on the existing arc spraying, and it is a metal for 3D printer that can produce a metal powder for a 3D printer with a sphericity of 95% or more and a uniform powder size of 20 to 30 microns. It is an object to provide a powder manufacturing apparatus.
- Metal powder manufacturing apparatus for a 3D printer a wire feeder for supplying a metal wire; a spray nozzle block for spraying the wire supplied from the wire feeder at a high temperature and injecting an inert gas into the sprayed area; a wrinkle chamber part disposed at the rear end of the thermal spray nozzle block and primarily cooling the molten spray sprayed from the thermal spray nozzle block, and provided with a wrinkle part along the longitudinal direction at the rear; a rear end chamber portion disposed at the rear end of the corrugated chamber portion for secondary cooling of the molten spray; at least one powder classifying part provided on the rear end chamber part and having a mesh shape to filter the metal powder cooled by the molten spray; and at least one powder collecting unit disposed below the powder classifying unit and configured to collect the filtered metal powder.
- the inside of the wrinkle chamber is formed in a vacuum atmosphere or an inert gas atmosphere.
- the powder classifying unit is provided to have an axis perpendicular to the longitudinal direction of the rear end chamber and an inclination of 15 degrees to 30 degrees.
- the powder classifying unit includes a first powder classifying unit, a second powder classifying unit, and a third powder classifying unit along the moving direction of the molten spray. are sequentially arranged at a predetermined interval, the first powder classifying unit is in the form of a mesh having a first particle size, and the second powder classifying unit is in the form of a mesh having a second particle size smaller than the first particle size,
- the third powder classifier has a mesh shape having a third particle size smaller than the second particle size.
- a metal powder manufacturing apparatus for a 3D printer according to another embodiment of the present invention, the first powder classifying unit, the second powder classifying unit, and a screw condensed on the rotation shaft of the third powder classifying unit; and a screw driving motor for rotationally driving the screw.
- a tapered portion tapered inwardly corresponding to the tip of the spray nozzle block is formed around the wire inlet hole of the wrinkle chamber portion, the tapered portion and the A vacuum sealing part is interposed between the front-end
- the length of the corrugation of the chamber can be adjusted to cope with different solidification times depending on the type of metal material, It can use the equipment space efficiently and is very useful for a multi-variety small-volume production system. It prevents primary oxidation during the melting and spraying process by injecting an inert gas when the wire is charged in the thermal spray nozzle block, and the corrugation chamber is placed in a vacuum or inert gas atmosphere.
- the powder classifying unit having a mesh shape rotates at a predetermined angle, so that it is stably collected in the metal powder powder collecting unit, and the metal powder is not intensively caught in a certain part of the powder classifying unit. It has the effect of making the maintenance cycle longer.
- the wire melt by interposing a vacuum sealing part between the periphery of the wire inlet hole of the corrugation chamber part and the tip of the spray nozzle block to prevent oxygen from flowing through the gap between the diameter of the wire and the inner diameter of the wire inlet, the wire melt There is an effect that can more reliably prevent the phenomenon of oxidation during cooling.
- FIG. 1 is a view conceptually depicting an apparatus for manufacturing metal powder for a 3D printer according to the present invention
- FIG. 2 is a view illustrating a spray nozzle block in the present invention
- FIG. 3 is a view showing an example in which the wire feeder and the power supply are integrally configured in the present invention.
- FIG. 4 is a diagram illustrating the configuration of a powder classifier in the present invention.
- ⁇ module a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software.
- first, second, etc. may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.
- the second component may be referred to as the first component, and similarly, the first component may also be referred to as the second component.
- the apparatus for manufacturing metal powder of the present invention includes a wire feeder 110 , a spray nozzle block 220 , a wrinkle chamber part 300 , a rear end chamber part 400 , and a powder classifying part 410 . , 420 , 430 , and a dust collecting unit 500 .
- the wire feeder 110 is a device that supplies a metal wire to the device.
- a wire charging block 210 is provided at the inlet end of the thermal spraying nozzle block 220 , and the metal wire supplied from the wire feeder 110 is charged into the thermal spraying nozzle block 220 through the wire charging block 210 .
- Electric energy is required to arc-spray the metal wire, and the power supply 120 applies a high voltage for arc generation to the spray nozzle block 220 .
- FIG. 2 is a view illustrating a thermal spraying nozzle block in the present invention, and in order to facilitate understanding of the present invention, the inlet end coupling part of the thermal spraying nozzle block 220 and the corrugated chamber part 300 is shown separately.
- the tip of the thermal spraying nozzle block 220 has a gun shape, and the wrinkle chamber part 300 tapers inward to correspond to the shape of the tip of the thermal spraying nozzle block 220 around the wire inlet 330 .
- a true tapered portion 320 is formed.
- the inside of the thermal spraying nozzle block 220 is provided with a wire charging unit 222 and a gas injection unit 224 .
- a wire charging unit 222 When the wire charged through the wire charging part 222 is charged into the corrugated chamber part through the nozzle tip, an inert gas such as Ar is injected through the gas injection part 224 to perform arc spraying, and the corrugated chamber part 300 The molten jet 250 is injected into the inside of the
- the vacuum sealing part 340 is interposed between the tapered part 320 of the wrinkle chamber part 300 and the front end of the thermal spraying nozzle block 220 .
- the vacuum sealing unit 340 seals the circumference of the wire inlet 330 to block oxygen from flowing through the clearance between the wire and the wire inlet. Therefore, it is possible to prevent the surface from being oxidized when the metal powder is formed while the molten spray 250 is cooled.
- FIG. 3 shows an example in which the wire feeder 110 and the power supply 120 are integrally configured in one vacuum chamber 180 . As shown, it is possible to block the inflow of oxygen in the thermal spraying process of the wire by locating all of the parts through which the wire is introduced into the thermal spraying nozzle block 220 and the corrugation chamber part 300 in the vacuum chamber 180 . .
- the corrugation chamber part 300 is provided with a corrugation part 310 along the longitudinal direction at the rear.
- the wrinkle portion 310 has a bellows form that can be stretched, and can be stretched and contracted by an operator according to a material for manufacturing the metal powder. That is, by adjusting the length of the corrugation chamber part 300 by stretching the corrugation part 310 according to the solidification time of the metal material, it is possible to control the length of the metal powder to a sufficient length until the primary cooling. Therefore, the facility space can be used efficiently and can be used interchangeably for multiple types with one device.
- the gas supply 130 is a means for supplying an inert gas, and is connected to the corrugated chamber part 300 through a gas supply line 132 .
- the vacuum pump 140 is connected through the corrugation chamber part 300 and the vacuum pump line 142 .
- the rear end of the corrugated chamber unit 300 is connected to a rear end chamber unit 400 for secondary cooling of the metal powder.
- a plurality of powder classifiers 410 , 420 , 430 having a mesh shape are disposed on the rear end chamber 400 to filter the metal powder as shown.
- powder collecting units 412 , 422 , and 432 for collecting metal powder are disposed below each of the powder classifying units 410 , 420 , and 430 .
- FIG. 4 is a view illustrating the configuration of the powder classifier in detail.
- the first powder classifier 410 and the second powder classifier along the direction in which the metal powder proceeds in the rear end chamber 400 The feeding unit 420 and the third powder classifying unit 430 are sequentially arranged at a predetermined interval.
- Each of the powder classifying units 410 , 420 , 430 is provided to have an axis perpendicular to the longitudinal direction of the rear end chamber unit 400 and an inclination of 15 to 30 degrees, and the rotating shaft rotates in conjunction with the screw 160 .
- the first powder classifying unit 410 is in the form of a mesh having a first particle size
- the second powder classifying unit 420 is in the form of a mesh having a second particle size smaller than the first particle size
- the third powder classifying unit ( 430) is in the form of a mesh having a third particle size smaller than the second particle size.
- the first powder 414 collected in the first powder collecting unit 412 has the largest size
- the second powder 424 collected in the second powder collecting unit 422 has an intermediate size
- the third powder 434 collected in the third powder collecting unit 432 has the smallest size.
- the metal powder may be stably collected by the powder collecting units 412 , 422 , 432 .
- the powder classifiers 410 , 420 , and 430 rotate by themselves, the metal powder is not intensively caught in a certain portion of the mesh, so that the maintenance cycle can be prolonged.
- by sequentially arranging meshes having different particle sizes to form a plurality of powder classifiers 410, 420, and 430 metal powders of different sizes can be classified and collected, and the uniformity of each metal powder is greatly improved. can do it
- a dust collecting unit 500 is installed at the rear of the rear end chamber unit 400 .
- the dust collecting unit 500 is cooled to a low temperature by a cooling jacket or heat exchange means.
- the dust collecting unit 500 collects the residue of the powdering process and prevents the metal fluid from being deposited in the chamber.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Powder Metallurgy (AREA)
Abstract
Description
Claims (10)
- 금속 와이어를 공급하는 와이어 피더;상기 와이어 피더로부터 공급되는 와이어를 고온으로 용사하며 용사 부위에 불활성 가스를 주입하는 용사 노즐 블록;상기 용사 노즐 블록의 후단에 배치되며 상기 용사 노즐 블록으로부터 분사되는 융용 분사물을 1차 냉각하고, 후방에는 길이방향을 따라 주름부가 구비되는 주름 챔버부;상기 주름 챔버부의 후단에 배치되며 상기 용융 분사물을 2차 냉각하는 후단 챔버부;상기 후단 챔버부 상에 구비되며 메시 형태를 가져 상기 용융 분사물이 냉각된 금속분말을 여과하는 적어도 하나의 분말 분급부; 및상기 분말 분급부의 하방에 배치되며 여과된 금속분말을 수거하는 적어도 하나의 분말 수거부를 포함하는 3D 프린터용 금속분말 제조장치.
- 제1항에 있어서,상기 주름 챔버부 내부는 진공 분위기 또는 불활성 가스 분위기로 조성되는 3D 프린터용 금속분말 제조장치.
- 제1항에 있어서,상기 분말 분급부는 상기 후단 챔버부의 길이방향에 대하여 수직인 축과 15도 내지 30도의 경사를 갖도록 구비되는 3D 프린터용 금속분말 제조장치.
- 제3항에 있어서,상기 분말 분급부는 상기 용융 분사물의 진행방향을 따라 제1 분말 분급부, 제2 분말 분급부, 및 제3 분말 분급부가 소정 간격을 두고 순차로 배치되며, 상기 제1 분말 분급부는 제1 입도를 갖는 메시 형태이고, 상기 제2 분말 분급부는 상기 제1 입도에 비해 입도가 작은 제2 입도를 갖는 메시 형태이고, 상기 제3 분말 분급부는 상기 제2 입도에 비해 입도가 작은 제3 입도를 갖는 메시 형태인 3D 프린터용 금속분말 제조장치.
- 제4항에 있어서,상기 제1 분말 분급부, 상기 제2 분말 분급부, 및 상기 제3 분말 분급부의 회전축에 축결되는 스크류; 및상기 스크류를 회전 구동하는 스크류 구동 모터를 더 포함하는 3D 프린터용 금속분말 제조장치.
- 제1항에 있어서,상기 주름 챔버부의 와이어 인입공 둘레에는 상기 용사 노즐 블록의 선단부에 대응하여 내측으로 테이퍼 진 테이퍼부가 형성되며, 상기 테이퍼부와 상기 용사 노즐 블록의 선단부 사이에는 진공 실링부가 개재되는 3D 프린터용 금속분말 제조장치.
- 제2항에 있어서,상기 주름 챔버부의 와이어 인입공 둘레에는 상기 용사 노즐 블록의 선단부에 대응하여 내측으로 테이퍼 진 테이퍼부가 형성되며, 상기 테이퍼부와 상기 용사 노즐 블록의 선단부 사이에는 진공 실링부가 개재되는 3D 프린터용 금속분말 제조장치.
- 제3항에 있어서,상기 주름 챔버부의 와이어 인입공 둘레에는 상기 용사 노즐 블록의 선단부에 대응하여 내측으로 테이퍼 진 테이퍼부가 형성되며, 상기 테이퍼부와 상기 용사 노즐 블록의 선단부 사이에는 진공 실링부가 개재되는 3D 프린터용 금속분말 제조장치.
- 제4항에 있어서,상기 주름 챔버부의 와이어 인입공 둘레에는 상기 용사 노즐 블록의 선단부에 대응하여 내측으로 테이퍼 진 테이퍼부가 형성되며, 상기 테이퍼부와 상기 용사 노즐 블록의 선단부 사이에는 진공 실링부가 개재되는 3D 프린터용 금속분말 제조장치.
- 제5항에 있어서,상기 주름 챔버부의 와이어 인입공 둘레에는 상기 용사 노즐 블록의 선단부에 대응하여 내측으로 테이퍼 진 테이퍼부가 형성되며, 상기 테이퍼부와 상기 용사 노즐 블록의 선단부 사이에는 진공 실링부가 개재되는 3D 프린터용 금속분말 제조장치.
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH06264116A (ja) * | 1993-03-12 | 1994-09-20 | Electroplating Eng Of Japan Co | 金属微粉末の製法とその製造装置 |
KR20080029531A (ko) * | 2006-09-29 | 2008-04-03 | 임중경 | 금속입자 제조장치 |
US20170144225A1 (en) * | 2013-01-24 | 2017-05-25 | California Institute Of Technology | Systems and methods for fabricating objects including amorphous metal using techniques akin to additive manufacturing |
KR20170064582A (ko) * | 2015-12-01 | 2017-06-12 | 주식회사 포스코 | 도포용액 공급장치 |
KR20190061316A (ko) * | 2017-11-27 | 2019-06-05 | 하나에이엠티 주식회사 | 가스 분무 금속 분말용 연속 회수 시스템 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101421244B1 (ko) | 2012-09-26 | 2014-07-18 | 한국기계연구원 | 플라즈마 처리를 통한 구형 티타늄 분말의 제조방법 및 이에 따라 제조된 구형 티타늄 분말 |
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- 2019-12-05 KR KR1020190160342A patent/KR102217025B1/ko active IP Right Grant
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- 2020-10-07 WO PCT/KR2020/013645 patent/WO2021112385A1/ko active Application Filing
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06264116A (ja) * | 1993-03-12 | 1994-09-20 | Electroplating Eng Of Japan Co | 金属微粉末の製法とその製造装置 |
KR20080029531A (ko) * | 2006-09-29 | 2008-04-03 | 임중경 | 금속입자 제조장치 |
US20170144225A1 (en) * | 2013-01-24 | 2017-05-25 | California Institute Of Technology | Systems and methods for fabricating objects including amorphous metal using techniques akin to additive manufacturing |
KR20170064582A (ko) * | 2015-12-01 | 2017-06-12 | 주식회사 포스코 | 도포용액 공급장치 |
KR20190061316A (ko) * | 2017-11-27 | 2019-06-05 | 하나에이엠티 주식회사 | 가스 분무 금속 분말용 연속 회수 시스템 |
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