Adolf Hetke - Livonia MI Kip M. Bonds - Union Lake MI
Assignee:
Ford Motor Company - Dearborn MI
International Classification:
B22C 902
US Classification:
164 34
Abstract:
A pattern destructible on contact with a molten metal charge is given a composite coating consisting of a highly tacky viscous adhesive substantially devoid of solids and single particle thickness layer collection of ultra-fine refractory particles (carbon facing sand) aligned on the surface of said adhesive. The adhesive volatilizes on contact with the casting charge while the refractory particles remain unaffected. An ultra-smooth cast surface is produced without macro crevices inherent in the surface of a destructible pattern and the mold sand is reusable without contamination by a high portion of burned sand.
Adolf Hetke - Livonia MI Kip M. Bonds - Union Lake MI
Assignee:
Ford Motor Company - Dearborn MI
International Classification:
B32B 326 B32B 516
US Classification:
428306
Abstract:
A pattern destructible on contact with a molten metal charge is given a composite coating consisting of a (1) highly tacky viscous adhesive substantially devoid of solids and having a low gas content, (2) a collection of ultra-fine refractory paticles (carbon facing sand) aligned on the surface of said adhesive. The adhesive volatilizes on contact with the casting charge while the refractory particles remain unaffected. An ultra-smooth cast surface is produced without macro crevices inherent in the surface of a destructible pattern and the mold sand is reusable without contamination by a high portion of burned sand.