Public domain
Aluminum casting. Before metal can be poured into the mold, this wooden superstructure will be completely filled with sand. Technically, it's known as facing sand on coperflask and placing of gaggers. But in anybody's language, it's one of the many operations necessary to complete molds in which vit
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Credit lineAluminum casting. Before metal can be poured into the mold, this wooden superstructure will be completely filled with sand. Technically, it's known as facing sand on coperflask and placing of gaggers.. 1942-01-01. Palmer, Alfred T., United States. Office For Emergency Management. Farm Security Administration/Office of War Information Collection, Library of Congress. Public domain.
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