Method for coating sand cores and sand molds

Details Method for coating sand cores and sand molds Method for coating sand cores and sand molds

1975-08-13

1977-01-04

Smith, Ronald H.

Coating processes

Mold coating

Sand mold

B29C 104, B29C 110

Patent

active

040014681

ABSTRACT:
Disclosed is a method for reducing the amount of atmospheric moisture absorbed by foundry sand cores and molds. A wash coating composition is applied to the surfaces of foundry sand cores and molds. The coating comprises an organic liquid which can be chlorinated hydrocarbon, a suspending agent which can be clay, a vegetable gum or an amine-treated bentonite, a refractory powder which can be graphite, coke, mica, silica, alumina, magnesia, talc or zircon flour, and an organic polymer or copolymer, vinyl toluene/acrylate copolymer, styrene/acetylene copolymer, acrylate homopolymers and styrene/butadiene copolymers.

REFERENCES:
patent: 2045913 (1936-06-01), Hoy et al.
patent: 2313674 (1943-03-01), Salzberg et al.
patent: 3216078 (1965-11-01), Frimsek et al.
patent: 3401735 (1968-09-01), Pursall
patent: 3541042 (1970-11-01), Levy
patent: 3654190 (1972-04-01), Levine
patent: 3922245 (1975-11-01), Skubon et al.

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