Foundry processes and compositions

Details Foundry processes and compositions Foundry processes and compositions

1978-05-19

1980-12-02

Hayes, Lorenzo B.

Metal founding

Process

Shaping a forming surface

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

Patent

active

042365694

ABSTRACT:
When making a foundry mould or core from a fluid mixture comprising sand and a foamed aqueous phase comprising resin condensate, foaming agent and acid curing agent and that is a stable foam, improved results are obtained if the fluid mixture is obtained by forming a fluid mix of the sand, resin condensate and foaming agent and then mixing the acid curing agent into this.

REFERENCES:
patent: 3424600 (1969-11-01), Liass et al.
patent: 3720642 (1973-03-01), Junger et al.
patent: 3734936 (1973-05-01), Brown et al.
patent: 3993117 (1976-11-01), Chevriot et al.

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