Sand casting pattern coating compositions

Details Sand casting pattern coating compositions Sand casting pattern coating compositions

1986-03-11

1987-06-30

Hayes, Lorenzo B.

Coating processes

Mold coating

Sand mold

106 3822, B44D 120

Patent

active

046769978

ABSTRACT:
Sand casting is an old art. In this molding process sand is compacted around a pattern and the pattern is removed, leaving a mold cavity the shape of the pattern. Molten metal can then be poured into the cavity to form the object. To increase the life of the mold, and to make removal of the pattern easier, the pattern must be coated with a protective material. Despite many available pattern coating compounds, mineral seal oil, and a mixture of mineral seal and clay, have been the commercial choices. But they are not without their disadvantages. The properties of mineral seal oil are not entirely desirable, particularly its low flash point and toxicity. Hereby the advantages of mineral seal oil-clay pattern coating compositions are retained without its detriments.

REFERENCES:
patent: 2885360 (1959-05-01), Haden et al.
patent: 2901361 (1959-08-01), Meisel
patent: 4508628 (1985-04-01), Walker et al.

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