ABSTRACT
Sand casting is a process in which molten metal is poured into sand molds, which are broken away from the cast part after the metal has solidified. The sand molds are made of two halves in which impressions are made by a pattern. When the two halves are assembled, the impressions form a cavity into which the molten metal is poured. The pattern resembles the part, but is slightly larger to accommodate for the metal shrinkage that occurs during cooling. Patterns may contain multiple impressions, to form multicavity sand molds, for the economical production of large quantities of castings.
