EP 1060814 A1 20001220 - Removing lost foam pattern coating residue from a casting
Title (en)
Removing lost foam pattern coating residue from a casting
Title (de)
Entfernung von Rückständen des verlorenen Giessmodells von einem Gussstück
Title (fr)
Elimination de residus d'un modèle perdu d'une pièce de coulée
Publication
Application
Priority
US 33585199 A 19990614
Abstract (en)
In the lost foam casting of aluminum, coating a fugitive pattern with a refractory coating containing a thermally stable, water-insoluble, acid-gasifiable (e.g. CaCO3) compound, and contacting the casting, with the coating thereon, with an acid to dissociate and gasify the compound and rupture the coating. Preferably, any thermal degradation products from the pattern residing in the coating are neutralized to promote wetting of the coating.
IPC 1-7
IPC 8 full level
B22C 1/14 (2006.01); B22C 1/16 (2006.01); B22C 3/00 (2006.01); B22C 7/02 (2006.01); B22D 29/00 (2006.01); B22D 31/00 (2006.01)
CPC (source: EP)
B22C 1/14 (2013.01); B22C 1/165 (2013.01); B22C 3/00 (2013.01); B22C 7/026 (2013.01); B22D 29/002 (2013.01); B22D 31/002 (2013.01)
Citation (search report)
[A] EP 0899038 A1 19990303 - GEN MOTORS CORP [US]
Designated contracting state (EPC)
DE FR IT NL
DOCDB simple family (publication)
EP 1060814 A1 20001220; EP 1060814 B1 20031008; DE 69911928 D1 20031113; DE 69911928 T2 20040722
DOCDB simple family (application)
EP 99121791 A 19991103; DE 69911928 T 19991103