Method for making foundry moulds and cores

Details Method for making foundry moulds and cores Method for making foundry moulds and cores

1976-04-28

1978-06-06

Hayes, Lorenzo B.

Compositions: coating or plastic

Coating or plastic compositions

Molds and mold coating compositions

106 383, 106 389, 106 85, 164 41, B28B 734

Patent

active

040934675

ABSTRACT:
A method for making foundry moulds and cores, according to which a self-hardening in the air plastic or liquid mixture is employed. Most advantageously the present invention may be used in making large-size foundry moulds and cores. The proposed method tends to increase substantially the thermal stability of both the moulds and cores due to the effect which the properties of the materials, utilized as a binder, exert on the sand. In addition, the hardening rate of the mixture is increased which is coupled with the simplified knocking-out of the sand from castings.

REFERENCES:
patent: 2368322 (1945-01-01), Passelecq
patent: 2522548 (1950-09-01), Streicher
patent: 2926098 (1960-02-01), Ilenda et al.

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