Method for producing foundry shapes
OwnerVictor S. LaFay, Stephen L. Neltnerinventors
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Abstract
A method for producing silica sand-based foundry shapes useful in forming metal castings and for reducing veining defects in sand-based foundry shapes by providing a foundry sand, adding an anti-veining composition that comprises bentonite to the foundry sand to form a mineral composition, then adding a foundry resin to the mineral composition to form a sand-based foundry composition and shaping the sand-based foundry composition to form a desired pattern.
Claims23
A method for producing silica sand-based foundry shapes useful in forming metal castings, said method comprising the steps of:
- providing a foundry sand, adding an anti-veining composition comprising bentonite to said foundry sand to form a mineral composition, and adding a foundry resin to said mineral composition to form a sand-based foundry composition;
- and
- shaping said sand-based foundry composition to form a desired pattern, wherein said anti-veining composition reduces veining in metal castings prepared from said sand-based foundry composition.
A method of making a metal casting from sand-based foundry compositions comprising the steps of:
- providing a foundry sand, adding an anti-veining composition comprising bentonite to said foundry sand to form a mineral composition, and adding a foundry resin to said mineral composition to form a sand-based foundry composition;
- shaping said sand-based foundry composition to form a desired pattern, wherein said anti-veining composition reduces veining in metal castings prepared from said sand-based foundry composition;
- and
- pouring molten metal into the pattern formed in said sand-based foundry composition to produce a metal casting having little or no veining.
Dependencies are inferred from the claim text.