(19)
(11) EP 1 266 746 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.05.2003 Bulletin 2003/18

(43) Date of publication A2:
18.12.2002 Bulletin 2002/51

(21) Application number: 02012406.1

(22) Date of filing: 07.06.2002
(51) International Patent Classification (IPC)7: B30B 11/00, B30B 15/02
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 16.06.2001 JP 2001175016
10.05.2002 JP 2002134830

(71) Applicant: Intermetallics Co., Ltd.
Kyoto 615-8206 (JP)

(72) Inventors:
  • Sagawa, Masato
    Nishikyo-ku, Kyoto 615-8294 (JP)
  • Watanabe, Toshihiro
    Muko-shi, Kyoto 617-0004 (JP)

(74) Representative: HOFFMANN - EITLE 
Patent- und Rechtsanwälte Arabellastrasse 4
81925 München
81925 München (DE)

   


(54) Method of producing powder compacts and foil or film-like mold members for use in the method


(57) A powder compact is produced by disposing a foil or film-like mold member (T) packed with a powder (P) in a cavity of a rubber mold (M) which is loaded in a die. The rubber mold (M), the foil or film-like type mold member (T) and the powder (P) packed in the foil or film-like mold member are compressed by a punch to obtain a powder compact. The powder compact with the foil or film-like mold member being attached thereto is removed, by pressure, from the rubber mold (M). Since the powder to be compressed into a compact is not packed directly in the cavity of the rubber mold, but is packed in the mold member, no part of the rubber mold is caught in the space formed by the powder that is in contact with the rubber mold. Accordingly, cracks and chips in the powder compact can be prevented even when the rubber mold is restored to its initial shape and many shape and size variations of the powder compact can be realized.






Search report