(19)
(11) EP 0 374 956 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
24.04.1991 Bulletin 1991/17

(43) Date of publication A2:
27.06.1990 Bulletin 1990/26

(21) Application number: 89123816.4

(22) Date of filing: 22.12.1989
(51) International Patent Classification (IPC)5: B28B 7/34, B22F 3/00
(84) Designated Contracting States:
DE FR GB SE

(30) Priority: 22.12.1988 JP 322176/88
22.12.1988 JP 322177/88
22.12.1988 JP 322178/88

(71) Applicant: NKK CORPORATION
Tokyo (JP)

(72) Inventors:
  • Nishio, Hiroaki c/o NKK Corporation
    Chiyoda-ku Tokyo (JP)
  • Takahashi, Tatsuhito NKK Corporation
    Chiyoda-ku Tokyo (JP)
  • Yabuta, Kazuya NKK Corporation
    Chiyoda-ku Tokyo (JP)
  • Kato, Akira NKK Corporation
    Chiyoda-ku Tokyo (JP)

(74) Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät 
Maximilianstrasse 58
80538 München
80538 München (DE)


(56) References cited: : 
   
       


    (54) Decay mold


    (57) A decay mold comprising a powder material having a transition accompanied with a volume change occurring at a temperature lower than the sintering temperature and a binder thereof, comprising a material thermally decomposable at a temperature lower than the sintering temperature, or comprising a material soluble at least in one solvent in which the molding assistant to impart formability to the powder to be molded is insoluble. By using the mold of the invention, an arbitrary form of sintered products can be manufactured without damaging it at the demolding.







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