Method of modifying patterned sand molding elements through machining for producing prototype metal castings

摘要

A method of forming prototype metal castings by forming and modifying one or more sand mold elements of a sand mold assembly. The method includes molding and patterning sand into shapes of the sand mold elements and then forming a first metal casting by filling the internal cavity of the first sand mold assembly with molten metal material. The first metal casting is evaluated for strength or other desirable characteristics. Once a defect is noted the sand mold elements are modified by machining sand away from at least one of the sand mold elements of a later formed sand mold assembly to modify the shape of the internal cavity between mold elements. Machining modifications are determined from evaluating the first metal casting. Then a modified metal casting is made by filling the modified internal cavity of the modified sand mold assembly with molten metal material.