Precision casting: precision casting is the most ancient of the metal casting arts, and at the same time, among the most modern and versatile. a wax pattern of the desired part is created. several identical wax patterns are assembled onto a "tree" and invested in a suitable mold refractory. the investment and drying process is repeated until a sufficient thickness has been built up to withstand the molten metal. the wax is melted out of the mold, leaving a cavity the shape of the part. molten metal of the selected alloy is poured into this cavity, producing the desired part in metal

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