Sandwich structure monolithic mold

Details Sandwich structure monolithic mold Sandwich structure monolithic mold

B - Operations, Transporting

22

C

22/108, 22/154,

B22C 9/24 (2006.01) B22C 1/16 (2006.01) B22C 9/04 (2006.01) B22D 23/00 (2006.01)

Patent

CA 1039925

ABSTRACT OF THE DISCLOSURE A monolithic mold and fabricatior method is disclosed for use in molding precision cast parts. In cross-section the mold has inner and outer layers, the essential ingredients of which include a ceramic refractory material and an inorganic binder. Intermediate layers are disposed between the inner and outer layers and employ an organic fugitive binder. When the mold is heated prior to receiving molten metal, the fugi- tive binder is volatilized, leaving the intermediate layer un- bound. After the parts have been cast the mold is easily col- lapsed for removal of the casting without damage.

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