EP0403040A2 - Procédé et dispositif pour fabriquer des articles pressés à dimensions exactes - Google Patents

Procédé et dispositif pour fabriquer des articles pressés à dimensions exactes Download PDF

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Publication number
EP0403040A2
EP0403040A2 EP90250140A EP90250140A EP0403040A2 EP 0403040 A2 EP0403040 A2 EP 0403040A2 EP 90250140 A EP90250140 A EP 90250140A EP 90250140 A EP90250140 A EP 90250140A EP 0403040 A2 EP0403040 A2 EP 0403040A2
Authority
EP
European Patent Office
Prior art keywords
press
tolerance band
pressing force
compact
pressing
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP90250140A
Other languages
German (de)
English (en)
Other versions
EP0403040B1 (fr
EP0403040A3 (fr
Inventor
Gerd Dr.-Ing. Hinzmann
Norbert Dipl.-Ing. Nies
Siegfried Radewahn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vodafone GmbH
Original Assignee
Mannesmann AG
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
Application filed by Mannesmann AG filed Critical Mannesmann AG
Priority to AT90250140T priority Critical patent/ATE96732T1/de
Publication of EP0403040A2 publication Critical patent/EP0403040A2/fr
Publication of EP0403040A3 publication Critical patent/EP0403040A3/fr
Application granted granted Critical
Publication of EP0403040B1 publication Critical patent/EP0403040B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0094—Press load monitoring means
    • 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
    • B22F3/02—Compacting only
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/005—Control arrangements

Definitions

  • the invention relates to a method for producing dimensionally stable compacts from pulverulent compositions according to the preamble of claim 1 and an apparatus for performing this method.
  • the object of the invention is therefore to provide a method and a device for carrying it out which permits even tighter tolerances with regard to the shape accuracy of the compacts and at the same time further reduces the risk of rejects production.
  • Each compact is in fact elastic to a certain extent, so it springs open after being molded out of the mold.
  • the size of this suspension depends on the density of the compact and thus indirectly on the applied pressing force. In principle, the larger the press force, the stronger the spring-up. However, the relationship between density and pressing force is not linear and depends on the powder material used. If, in the production of compacts of identical shape per se, the press punches are brought into exactly the same position in relation to one another in the press end position, it is therefore in no way ensured that two compacts of exactly the same size also result. If one uses a greater pressing force than the other due to the greater bulk density of the powder filling, different parts will result in any case because the springing after the molding has been formed must be different.
  • an even wider path-dependent tolerance band of the pressing force can be provided, the press of which is switched off when it is left. If the maximum permissible pressing force is exceeded, cold welding of punches, for example, may have been the cause, so that greater tool damage is avoided by stopping the press. Conversely, if the pressure drops below the minimum, the mold may have been filled insufficiently or not at all, for example due to a disturbance in the powder supply, so that even in such a case the press must be switched off in order to avoid damage to the mold.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Powder Metallurgy (AREA)
  • Press Drives And Press Lines (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
EP90250140A 1989-06-15 1990-05-31 Procédé et dispositif pour fabriquer des articles pressés à dimensions exactes Expired - Lifetime EP0403040B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90250140T ATE96732T1 (de) 1989-06-15 1990-05-31 Verfahren und vorrichtung zur herstellung masshaltiger presslinge.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3919847A DE3919847A1 (de) 1989-06-15 1989-06-15 Verfahren und vorrichtung zur herstellung masshaltiger presslinge
DE3919847 1989-06-15

Publications (3)

Publication Number Publication Date
EP0403040A2 true EP0403040A2 (fr) 1990-12-19
EP0403040A3 EP0403040A3 (fr) 1991-03-06
EP0403040B1 EP0403040B1 (fr) 1993-11-03

Family

ID=6382959

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90250140A Expired - Lifetime EP0403040B1 (fr) 1989-06-15 1990-05-31 Procédé et dispositif pour fabriquer des articles pressés à dimensions exactes

Country Status (5)

Country Link
US (1) US5024811A (fr)
EP (1) EP0403040B1 (fr)
JP (1) JPH082519B2 (fr)
AT (1) ATE96732T1 (fr)
DE (2) DE3919847A1 (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3609107B2 (ja) * 1992-11-20 2005-01-12 インターメタリックス株式会社 圧粉成形体成形方法及び装置
DE69325924T2 (de) * 1993-11-24 2000-02-17 Stackpole Ltd., Mississauga Versetzte mehrteilige pressform
CA2154556C (fr) * 1993-11-24 2006-02-21 Gerd Hinzmann Filiere double pour piece a contre-depouille
US6165400A (en) * 1996-05-09 2000-12-26 Stackpole Limited Compacted-powder opposed twin-helical gears and method
US6440357B1 (en) 1996-05-09 2002-08-27 Stackpole Limited Compacted-powder opposed twin-helical gears and method
DE19728767C1 (de) * 1997-07-07 1999-01-07 Forschungszentrum Juelich Gmbh Preßwerkzeug zum uniaxialen Kaltpressen von Pulverproben
DE19854075A1 (de) * 1998-11-24 2000-05-25 Henkel Kgaa Verfahren zur Serienfertigung von Formkörpern mit geringer Härteschwankung
US6669891B1 (en) * 1999-04-02 2003-12-30 Midwest Brake Bond Company Method and apparatus for producing brake lining material
US6531090B2 (en) * 2000-02-17 2003-03-11 Sumitomo Special Metals Co., Ltd. Method for producing powder compact and method for manufacturing magnet
GB2360825B (en) * 2000-03-30 2004-11-17 Formflo Ltd Gear wheels roll formed from powder metal blanks
JP3687492B2 (ja) * 2000-06-21 2005-08-24 株式会社村田製作所 誘電体ブロックのプレス成形方法
DE10142772C2 (de) * 2001-08-31 2003-09-25 Fette Wilhelm Gmbh Verfahren zur Herstellung von Pressteilen in einer Pulverpresse
DE10151858A1 (de) * 2001-10-24 2003-05-08 Dorst Masch & Anlagen Verfahren zum Einstellen bzw. Überwachen eines Pressen-Werkzeugs und Pressen-Werkzeug bzw. Pressen-Steuereinrichtung dafür
DE10301224A1 (de) * 2003-01-15 2004-08-05 Maschinenfabrik Lauffer Gmbh & Co Kg Verfahren zur Endpositionsregelung einer Presse für maßgenaue Formkörper
WO2011001868A1 (fr) * 2009-07-03 2011-01-06 三和システムエンジニアリング株式会社 Procédé de moulage par compression pour poudre et dispositif pour celui-ci
DE102009004620A1 (de) * 2009-01-15 2010-07-22 Gkn Sinter Metals Holding Gmbh Verfahren zum Betrieb einer Pressvorrichtung zur Herstellung von Presslingen konstanter Höhe aus pulverförmigen Stoffen, Steuergerät für eine derartige Pressvorrichtung und Pressvorrichtung
WO2012015243A2 (fr) * 2010-07-30 2012-02-02 Lg Innotek Co., Ltd. Appareil de frittage par presse à chaud et élément presse
CN112170843B (zh) * 2020-09-29 2023-01-31 中国航发动力股份有限公司 一种旋流器流道的激光选区熔化成形工艺模型确定方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3389432A (en) * 1966-04-18 1968-06-25 Cincinnati Shaper Co Load indicating device for compacting press
US3698843A (en) * 1971-02-24 1972-10-17 Nat Forge Co High production isostatic molding device
DE2951716A1 (de) * 1979-12-19 1981-07-02 Mannesmann AG, 4000 Düsseldorf Verfahren und vorrichtung zum pressen von formkoerpern
JPS58215299A (ja) * 1982-06-09 1983-12-14 Nippon Piston Ring Co Ltd 複合バルブシ−トの製造方法
SE456458B (sv) * 1983-07-12 1988-10-03 Nobel Elektronik Ab Reglerkrets
US4570229A (en) * 1983-09-19 1986-02-11 Pennwalt Corporation Tablet press controller and method
DE3715077A1 (de) * 1987-05-06 1988-12-01 Netzsch Maschinenfabrik Verfahren zum steuern einer presse

Also Published As

Publication number Publication date
EP0403040B1 (fr) 1993-11-03
US5024811A (en) 1991-06-18
ATE96732T1 (de) 1993-11-15
DE3919847A1 (de) 1990-12-20
EP0403040A3 (fr) 1991-03-06
DE59003294D1 (de) 1993-12-09
JPH082519B2 (ja) 1996-01-17
DE3919847C2 (fr) 1991-03-28
JPH0327897A (ja) 1991-02-06

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