(19)
(11) EP 0 489 509 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.05.1993 Bulletin 1993/21

(43) Date of publication A2:
10.06.1992 Bulletin 1992/24

(21) Application number: 91310485.7

(22) Date of filing: 13.11.1991
(51) International Patent Classification (IPC)5: B22C 15/28, B22C 9/00
(84) Designated Contracting States:
DE GB

(30) Priority: 14.11.1990 JP 306168/90
30.05.1991 JP 127284/91
15.05.1991 JP 110428/91
07.06.1991 JP 136397/91

(71) Applicants:
  • MITSUBISHI JUKOGYO KABUSHIKI KAISHA
    Tokyo (JP)
  • KAO QUAKER CO., LTD.
    Chuo-Ku, Tokyo (JP)

(72) Inventors:
  • Sano, Hiroaki
    5007 Itozaki-cho Mihara Hiroshima Pref. (JP)
  • Yasukuni, Takashi
    5007 Itozaki-cho Mihara Hiroshima Pref. (JP)
  • Ohata, Masaaki
    5007 Itozaki-cho Mihara Hiroshima Pref. (JP)
  • Nagai, Kiyotaka
    5007 Itozaki-cho Mihara Hiroshima Pref. (JP)
  • Matsuura, Hiroshi
    5007 Itozaki-cho Mihara Hiroshima Pref. (JP)
  • Koshiishi, Kunio
    Kayabacho 1-chome Chuo-ku Tokyo (JP)
  • Hirama, Yasuyoshi
    Kayabacho 1-chome Chuo-ku Tokyo (JP)
  • Ogawa, Kyozaburo
    Aioi, Hyogo Pref. (JP)

(74) Representative: W.P. Thompson & Co. 
Coopers Building, Church Street
Liverpool L1 3AB
Liverpool L1 3AB (GB)


(56) References cited: : 
   
       


    (54) Method of manufacturing core and mold


    (57) A method of manufacturing a core and a mold using self-hardening molding sand or gas-hardening molding sand, wherein the self-hardening molding sand or the gas-hardening molding sand is charged in a core pattern or a flask while applying three-dimensional jolt, and a method of manufacturing a core and a mold using self-hardening molding sand, wherein air flow is precipitated by sucking the self-hardening molding sand in a core pattern or a flask.






    Search report