Moulding composition for making foundry moulds and cores

Details Moulding composition for making foundry moulds and cores Moulding composition for making foundry moulds and cores

1977-02-09

1978-12-26

Hayes, Lorenzo B.

Compositions: coating or plastic

Coating or plastic compositions

Molds and mold coating compositions

106 383, 106 385R, 106 90, 106 92, 106 98, 106104, B28B 734

Patent

active

041314778

ABSTRACT:
A moulding composition for making foundry moulds and cores which comprises: foundry sand as a filler; a ligno-sulphonate of an alkali metal, an alkali earth metal, an ammonium or mixtures thereof as a binding ingredient; and a phenol or mixture of phenols as an additive.
The composition provides for high strength (between 10 and 30 kg/cm.sup.2) moulds and cores made therefrom, including those intended for big castings. The process of preparing moulds and cores is simple if the said composition is to be used, due to the fact that the labor requirements for packing the composition are reduced, as is the time of drying. Furthermore, moulds and cores made from the composition disclosed give a better impression of the pattern from which there is practically no dropping out.

REFERENCES:
patent: 2863781 (1958-12-01), Wallace et al.
patent: 3275460 (1966-09-01), Jeanneret
patent: 3804641 (1974-04-01), Lyass et al.

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