Process and materials for making refractory cores

Details Process and materials for making refractory cores Process and materials for making refractory cores

B - Operations, Transporting

22

C

25/125, 22/159,

B22C 1/02 (2006.01) B22C 1/16 (2006.01)

Patent

CA 1157487

Abstract Ceramic cores suitable for use in investment casting operations are molded from a mixture containing comminuted refractory which includes partially de- hydrated gypsum and a sublimable binder. When the sublimable binder has been sublimated from the molded core, it is soaked in water in order to hydrate the gypsum and cause it to set.

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