HK102095A - Process for manufacturing sintered bodies - Google Patents

Process for manufacturing sintered bodies

Info

Publication number
HK102095A
HK102095A HK102095A HK102095A HK102095A HK 102095 A HK102095 A HK 102095A HK 102095 A HK102095 A HK 102095A HK 102095 A HK102095 A HK 102095A HK 102095 A HK102095 A HK 102095A
Authority
HK
Hong Kong
Prior art keywords
sintered bodies
manufacturing sintered
manufacturing
bodies
sintered
Prior art date
Application number
HK102095A
Other languages
English (en)
Inventor
Kihara Hiroshi
Arai Eiki
Ogata Shigeaki
Katagiri Yoshio
Original Assignee
Sumiromo Osaka Cement Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP63252672A external-priority patent/JPH0653884B2/ja
Priority claimed from JP64000610A external-priority patent/JPH0689371B2/ja
Priority claimed from JP64000611A external-priority patent/JPH0689372B2/ja
Priority claimed from JP1128261A external-priority patent/JPH0689370B2/ja
Application filed by Sumiromo Osaka Cement Co Ltd filed Critical Sumiromo Osaka Cement Co Ltd
Publication of HK102095A publication Critical patent/HK102095A/xx

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B35/63408—Polyalkenes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • B22F1/103—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material containing an organic binding agent comprising a mixture of, or obtained by reaction of, two or more components other than a solvent or a lubricating agent
    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • 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
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/10—Sintering only
    • B22F3/1017—Multiple heating or additional steps
    • B22F3/1021—Removal of binder or filler
    • B22F3/1025—Removal of binder or filler not by heating only
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B35/63416—Polyvinylalcohols [PVA]; Polyvinylacetates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B35/63424—Polyacrylates; Polymethacrylates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B35/63432—Polystyrenes
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • C04B35/63404—Polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B35/63444—Nitrogen-containing polymers, e.g. polyacrylamides, polyacrylonitriles, polyvinylpyrrolidone [PVP], polyethylenimine [PEI]
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • C04B35/634—Polymers
    • C04B35/63448—Polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
    • C04B35/63488—Polyethers, e.g. alkylphenol polyglycolether, polyethylene glycol [PEG], polyethylene oxide [PEO]
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • C04B35/636—Polysaccharides or derivatives thereof
    • C04B35/6365—Cellulose or derivatives thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/638—Removal thereof

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Structural Engineering (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mechanical Engineering (AREA)
  • Powder Metallurgy (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
HK102095A 1988-10-06 1995-06-22 Process for manufacturing sintered bodies HK102095A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP63252672A JPH0653884B2 (ja) 1988-10-06 1988-10-06 粉末の射出成形体からバインダーを除去する方法
JP64000610A JPH0689371B2 (ja) 1989-01-05 1989-01-05 粉末の成形体の脱脂方法
JP64000611A JPH0689372B2 (ja) 1989-01-05 1989-01-05 粉末の成形体の脱脂方法
JP1128261A JPH0689370B2 (ja) 1989-05-22 1989-05-22 粉末の可塑成形による焼結品の製造方法

Publications (1)

Publication Number Publication Date
HK102095A true HK102095A (en) 1995-06-30

Family

ID=27453214

Family Applications (1)

Application Number Title Priority Date Filing Date
HK102095A HK102095A (en) 1988-10-06 1995-06-22 Process for manufacturing sintered bodies

Country Status (5)

Country Link
US (1) US5059388A (xx)
EP (1) EP0362866B1 (xx)
KR (1) KR930006005B1 (xx)
DE (1) DE68914379T2 (xx)
HK (1) HK102095A (xx)

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JPH0393673A (ja) * 1989-09-07 1991-04-18 Nkk Corp 金属またはセラミックスの成形体の分散媒除去装置
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US5665289A (en) * 1990-05-07 1997-09-09 Chang I. Chung Solid polymer solution binders for shaping of finely-divided inert particles
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JP3092860B2 (ja) * 1991-04-18 2000-09-25 三井金属鉱業株式会社 ジルコニアセラミックスの射出成形方法
JPH04329801A (ja) * 1991-04-30 1992-11-18 Sumitomo Electric Ind Ltd 焼結部品の製造方法
JP2914820B2 (ja) * 1992-05-28 1999-07-05 富士通株式会社 射出成形用原料
US5332537A (en) * 1992-12-17 1994-07-26 Pcc Airfoils, Inc. Method and binder for use in powder molding
US5427721A (en) * 1993-10-29 1995-06-27 W. R. Grace & Co.-Conn. Method of making microcellular ceramic bodies
US5409871A (en) * 1993-11-02 1995-04-25 Pcc Airfoils, Inc. Ceramic material for use in casting reactive metals
US5854379A (en) * 1994-03-14 1998-12-29 Kabushiki Kaisha Komatsu Seisakusho Thermal decomposition degreasing method and molded products thereof
US5877270A (en) * 1994-03-14 1999-03-02 Kabushiki Kaisha Komatsu Seisakusho Water solvent extraction degreasing method and molded products produced therewith
US5627258A (en) * 1994-03-14 1997-05-06 Kabushiki Kaisha Komatsu Seisakusho Binder for use in metal powder injection molding and debinding method by the use of the same
JPH10110201A (ja) * 1996-10-03 1998-04-28 Komatsu Ltd 脱脂方法およびそれにより得られる脱脂体並びに焼結体
US5599890A (en) * 1994-03-21 1997-02-04 Rohm And Haas Company Polymeric binder
NL9400879A (nl) * 1994-05-27 1996-01-02 Univ Delft Tech Werkwijze voor het vervaardigen van gevormde voorwerpen uit metallische of keramische poederdeeltjes alsmede bindersysteem dat geschikt is om daarbij te worden gebruikt.
US5470525A (en) * 1994-07-01 1995-11-28 H. C. Starck, Inc. Removal of binder from Ta products
EP0809556B1 (en) * 1995-02-14 1998-10-21 Komatsu Ltd. Binder for use in metal powder injection molding and debinding method by the use of the same
US5641920A (en) * 1995-09-07 1997-06-24 Thermat Precision Technology, Inc. Powder and binder systems for use in powder molding
US5723083A (en) * 1995-09-29 1998-03-03 Rohm And Haas Company Method for forming parts from inorganic particulate material
GB2307918B (en) * 1995-12-05 1999-02-10 Smith International Pressure molded powder metal "milled tooth" rock bit cone
GB9700566D0 (en) * 1997-01-13 1997-03-05 Avx Ltd Binder removal
DE19718672C1 (de) * 1997-05-02 1998-09-24 Zschimmer & Schwarz Gmbh & Co Verwendung eines Zuckers
US5977230A (en) * 1998-01-13 1999-11-02 Planet Polymer Technologies, Inc. Powder and binder systems for use in metal and ceramic powder injection molding
RU2162755C1 (ru) * 2000-06-15 2001-02-10 Закрытое акционерное общество "ФИРМА РИКОМ" Способ изготовления состава
US6478842B1 (en) 2000-07-19 2002-11-12 R. A. Brands, Llc Preparation of articles using metal injection molding
US6949251B2 (en) 2001-03-02 2005-09-27 Stryker Corporation Porous β-tricalcium phosphate granules for regeneration of bone tissue
US7326274B2 (en) * 2001-10-18 2008-02-05 Praxis Powder Technology, Inc. Binder compositions and methods for binder assisted forming
KR100477321B1 (ko) * 2002-01-12 2005-03-18 김형수 스티렌계 영구제전성 수지 조성물의 제조방법
DE10248888B4 (de) * 2002-10-18 2005-01-27 Forschungszentrum Jülich GmbH Verfahren zur Herstellung endkonturnaher, metallischer und/oder keramischer Bauteile
US7237730B2 (en) 2005-03-17 2007-07-03 Pratt & Whitney Canada Corp. Modular fuel nozzle and method of making
US8114336B2 (en) * 2007-03-16 2012-02-14 Board Of Regents Of The University Of Texas System Methods for increasing the strength and controlling the architecture and composition of ceramic articles
US8316541B2 (en) 2007-06-29 2012-11-27 Pratt & Whitney Canada Corp. Combustor heat shield with integrated louver and method of manufacturing the same
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CA3048850A1 (en) 2010-05-11 2011-11-17 Howmedica Osteonics Corp. Organophosphorous, multivalent metal compounds, & polymer adhesive interpenetrating network compositions & methods
JP5149946B2 (ja) * 2010-09-28 2013-02-20 株式会社Ｋ・Ｓ・Ａ 溶加材の製造方法及び溶加材
EP2686286B1 (de) * 2011-03-16 2015-10-28 Basf Se Verfahren zur herstellung von metallischen oder keramischen formkörpern
US8765189B2 (en) 2011-05-13 2014-07-01 Howmedica Osteonic Corp. Organophosphorous and multivalent metal compound compositions and methods
CN102513538B (zh) * 2011-12-23 2014-04-09 泰克科技(苏州)有限公司 一种钽电容阳极块的烧结方法
KR20170119694A (ko) * 2015-02-26 2017-10-27 코닝 인코포레이티드 무기 재료로부터 투명 3d 부품을 제작하기 위한 적층 가공 공정
FR3047189B1 (fr) * 2016-02-02 2021-04-23 Snecma Procede de fabrication d'une piece frittee obtenue par mise en forme d'une poudre
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JPS59128266A (ja) * 1983-01-14 1984-07-24 株式会社クラレ セラミツク成形体の製造法
JPS61155264A (ja) * 1984-12-26 1986-07-14 住友重機械工業株式会社 液化した流体により成形体中のバインダ−を除去する方法
US4721599A (en) * 1985-04-26 1988-01-26 Hitachi Metals, Ltd. Method for producing metal or alloy articles
US4765950A (en) * 1987-10-07 1988-08-23 Risi Industries, Inc. Process for fabricating parts from particulate material

Also Published As

Publication number Publication date
DE68914379D1 (de) 1994-05-11
EP0362866A2 (en) 1990-04-11
DE68914379T2 (de) 1994-09-01
EP0362866A3 (en) 1991-11-13
KR930006005B1 (ko) 1993-07-01
EP0362866B1 (en) 1994-04-06
US5059388A (en) 1991-10-22
KR900006093A (ko) 1990-05-07

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