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An aluminum sand casting is a part produced by forming a mold from sand that is coated by a binder (either water or chemical). The cavity of the mold is formed by using a positive pattern of the part desired, ramming the sand around the pattern and then separating the pattern from the molded sand. Liquid aluminum is poured into the resulting cavity and left to solidify. After the metal has solidified the aluminum casting is extracted from the sand mold by breaking the molded sand. There are some cultures that permanent mold is referred to as gravity die casting.
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