Mold material for forming sandmold without requiring mold wash

Details Mold material for forming sandmold without requiring mold wash Mold material for forming sandmold without requiring mold wash

1987-04-22

1988-10-04

Jacobs, Lewis T.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523142, 523144, 523145, 523148, C08K 336, C08K 334

Patent

active

047757043

ABSTRACT:
A mold material for forming sandmolds for manufacturing metal castings, consisting essentially of an organic binder: 0.4-3.0 percent, a catalyst for curing the organic binder: 0.2-2.0 percent of, a ceramic binder: 0.05-2.0 percent in terms of SiO.sub.2, a catalyst for curing the ceramic binder: 0.05-2.0 percent, and foundry sand: the balance. The mold material can be formed into a sandmold which is excellent in both strength after exposure under a room temperature atmosphere and strength after pouring molten metal thereinto and requires no mold wash or a very small amount of mold wash as obtained by spraying or the like. The mold material may preferably further includes, if required, anti-infiltration fire-proof powder; 0.1-3.0 percent, a high-temperature reinforcing material: 0.1-3.0 percent, a viscosity adjuster: 0.1-2.0 percent, and/or a grannular carbon stabilizer: 0.03-0.5 percent.

REFERENCES:
patent: 3870529 (1975-03-01), Okumoto et al.
patent: 3968827 (1976-07-01), Perevozkin et al.
patent: 4530722 (1985-07-01), Moore et al.
patent: 4602667 (1986-07-01), Moore et al.
patent: 4644948 (1987-05-01), Moore et al.

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