EP 0774311 A1 19970521 - Apparatus and method for producing a core
Title (en)
Apparatus and method for producing a core
Title (de)
Vorrichtung und Verfahren zur Herstellung eines Kernes
Title (fr)
Dispositif et procédé pour la production d'un noyau
Publication
Application
Priority
- JP 32366095 A 19951117
- JP 6198596 A 19960223
Abstract (en)
A method is disclosed of producing a highly consolidated sand core. The method includes the steps of closing metal mold halves (13a, 13b) to define a core space (14), charging gas-curable molding sand into the mold space, evacuating the core space to a pressure of 2 - 100 Torr, introducing air into the evacuated core space at an air pressure that increases at a rate of 50 - 600 kg/cm<2> /sec to apply a pressure to the surface of the gas-curable molding sand to obtain a high charging density; and introducing a curing gas into the core space to harden the molding sand. <IMAGE>
IPC 1-7
IPC 8 full level
B22C 15/24 (2006.01)
CPC (source: EP KR)
B22C 9/123 (2013.01 - EP); B22C 15/24 (2013.01 - EP); H01F 41/02 (2013.01 - KR)
Citation (applicant)
Citation (search report)
- [Y] EP 0123756 A1 19841107 - NANIWA PRODUCTS CO LTD [JP]
- [Y] CH 612605 C
- [A] DE 9315614 U1 19931223 - HOTTINGER ADOLF MASCH [DE]
- [A] EP 0443287 A2 19910828 - NANIWA PRODUCTS CO LTD [JP]
Designated contracting state (EPC)
CH DE FR GB LI
DOCDB simple family (publication)
EP 0774311 A1 19970521; CN 1159374 A 19970917; KR 970029928 A 19970626
DOCDB simple family (application)
EP 96118272 A 19961114; CN 96123401 A 19961115; KR 19960054788 A 19961118