PRESSURE MOLDING PROCESS USING SALT CORES AND A COMPOSITION FOR MAKING CORES

摘要

PRESSURE MOLDING PROCESS USING SALT CORES AND A COMPOSITION FOR MAKING CORES A process for pressure molding an article around a hardened salt mold core made from a mixture of relatively low melting temperature salt and sand wherein the core is removed from the finished article by immersion of the article containing the core into a molten bath mixture of the core material thereby to melt the core out of the article, recover the core material, and thus replenish the bath for use in making additional cores. The bath is originally constituted by melting a suitable quantity of a dry premix of the salt and sand.