Foundry processes and compositions

Details Foundry processes and compositions Foundry processes and compositions

1977-01-24

1978-09-05

Hayes, Lorenzo B.

Metal founding

Process

Shaping a forming surface

260 293, 260 294R, 260 38, 260 39SB, 260DIG40, B22C 122

Patent

active

041112539

ABSTRACT:
Improved method for making foundry moulds and cores involves use of composition having foamed aqueous phase and comprising foundry sand, resin, curing agent for resin, silane, a low amount of water and a foaming agent such that the foam persists until the composition sets. Preferred features reside in having a total water content of from about 1% to about 2%, in using sodium lauryl ether sulphate as the foaming agent and in the order of mixing the ingredients.

REFERENCES:
patent: 3424600 (1969-01-01), Liass et al.
patent: 3720642 (1973-03-01), Junger et al.
patent: 3734936 (1973-05-01), Brown et al.

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