patternmaker's shrinkage

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Casting (metalworking) — Casting iron in a sand mold In metalworking, casting involves pouring liquid metal into a mold, which contains a hollow cavity of the desired shape, and then allowing it to cool and solidify. The solidified part is also known as a casting, which… … Wikipedia
Pattern (casting) — In the process of casting, a pattern is a replica of the object to be cast, used to prepare the cavity into which molten material will be poured during the casting process.Patterns used in sand casting may be made of wood, metal, plastics or… … Wikipedia
patternmaking — See patternmaker. * * * In materials processing, the first step in casting and molding processes, the making of an accurate model of the part, somewhat oversize to allow for shrinkage of the cast material as it cools. Foundry workers then make a… … Universalium

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