EP 0386384 B1 19920930 - PROCESS FOR THE LOST FOAM CASTING UNDER PRESSURE OF METAL PIECES
Title (en)
PROCESS FOR THE LOST FOAM CASTING UNDER PRESSURE OF METAL PIECES
Publication
Application
Priority
FR 8903706 A 19890307
Abstract (en)
[origin: EP0386384A1] This process consists in applying the increasing isostatic gas pressure to the mould after it has been filled at a rate of increase such that the said pressure generates, rapidly and temporarily as a result of pressure drop through the sand, an excess pressure of the molten metal relative to the sand at the level of their interface, this excess pressure reaching a value lying between two limits and subsequently increasing as the said pressure increases, and then in maintaining the said pressure at a constant level until the part has completely solidified. This invention finds its application in the production of parts, in particular made from aluminium alloys, having, apart from an improved compactness, a surface which is free of blowholes and carbonaceous inclusions.
IPC 1-7
IPC 8 full level
B22C 9/04 (2006.01); B22D 23/00 (2006.01); B22D 27/13 (2006.01)
CPC (source: EP KR)
B22C 9/04 (2013.01 - KR); B22C 9/046 (2013.01 - EP); B22D 2/00 (2013.01 - KR); B22D 18/00 (2013.01 - KR); B22D 27/13 (2013.01 - EP)
Designated contracting state (EPC)
AT BE CH DE ES GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0386384 A1 19900912; EP 0386384 B1 19920930; AR 241761 A1 19921230; AT E81044 T1 19921015; AU 3780489 A 19891019; AU 600413 B2 19900809; BR 8903257 A 19900925; CA 1335689 C 19950530; DE 68903103 D1 19921105; DE 68903103 T2 19930415; DK 320189 A 19900908; DK 320189 D0 19890628; ES 2034726 T3 19930401; FI 893154 A0 19890628; FI 893154 A 19900908; FI 93322 B 19941215; FI 93322 C 19950327; GR 3005937 T3 19930607; IE 63394 B1 19950419; IE 892097 L 19900907; JP H02235546 A 19900918; JP H0626748 B2 19940413; KR 900014059 A 19901022; KR 920003686 B1 19920509; MX 172962 B 19940126; NO 172968 B 19930628; NO 172968 C 19931006; NO 892666 D0 19890627; NO 892666 L 19900910; PT 91078 A 19901107; PT 91078 B 19950703; RU 1836177 C 19930823; UA 13214 A 19970228
DOCDB simple family (application)
EP 89420215 A 19890613; AR 31430289 A 19890629; AT 89420215 T 19890613; AU 3780489 A 19890703; BR 8903257 A 19890630; CA 603469 A 19890621; DE 68903103 T 19890613; DK 320189 A 19890628; ES 89420215 T 19890613; FI 893154 A 19890628; GR 920402257 T 19921012; IE 209789 A 19890628; JP 17696989 A 19890707; KR 890010344 A 19890721; MX 1662989 A 19890628; NO 892666 A 19890627; PT 9107889 A 19890706; SU 4614509 A 19890712; UA 4614509 A 19890712