Dimensionally accurate expanded foam casting pattern

Details Dimensionally accurate expanded foam casting pattern Dimensionally accurate expanded foam casting pattern

C - Chemistry, Metallurgy

08

J

C08J 9/232 (2006.01) B22C 7/02 (2006.01) B29C 44/34 (2006.01) B29C 44/44 (2006.01)

Patent

CA 2081427

A method is disclosed for heating pre-expanded foundry pattern molding beads of polystyrene or the like in a stream of hot air to reduce the vapor-forming expansion agent content for the purpose of producing more dimensionally accurate, molded foam bead casting patterns.

La présente invention a trait à une méthode pour chauffer des billes de polystyrène moulées à motif fonderie ou des articles similaires dans un courant d'air chaud de manière à réduire la teneur en agent d'expansion causant des vapeurs dans le but de produire des articles de mousse moulée dimensionnés avec une plus grande précision.

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