Curing foundry moulds and cores

Details Curing foundry moulds and cores Curing foundry moulds and cores

1985-12-16

1987-07-07

Godici, Nicholas P.

Metal founding

Process

Shaping a forming surface

164525, 164528, 106 382, 106 3835, B22C 912

Patent

active

046780203

ABSTRACT:
Foundry moulds and, more especially, cores are made by the use of a binder comprising ammonium polyacrylate and zinc oxide or a metal salt to form a complex ammonium metal polyacrylate which is mixed with the sand and after the core or mould has been formed in a warm box warm air is passed through it to drive off the ammonia and form a water-insoluble metal polyacrylate which bonds the grains of sand together. The resulting core or mould has a good shelf life combined with excellent knock-out behavior.

REFERENCES:
patent: 2829060 (1958-04-01), Emblem et al.
patent: 4236931 (1980-12-01), Kiehl et al.
patent: 4495980 (1985-01-01), Morley

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