Casting Method
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United States of America
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Issued Date -
Feb 13, 2020
app pub date -
Oct 18, 2017
filing date -
Oct 18, 2017
priority date (Note) -
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Abstract
A method of casting an article from a molten metal including: admitting molten metal to a mould formed from a foundry sand comprising a blend of silica sand and a zircon aggregate, the zircon aggregate exhibiting a sharp rise in linear thermal expansion coefficient in a temperature band above 1200° C. and up to 1600° C.; and cooling the mould and molten metal to solidify the molten metal and form a cast article, wherein one or more surfaces of the mould, or of a portion of the mould, in contact with the molten metal are uncoated.
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