Profile: Reffel Metals Foundry, Inc., J. W. provides castings in aluminum, bronze, brass, and zinc alloys. Our process includes green sand casting, no bake casting, permanent mold casting, squeeze casting, curved hose mandrel casting, pattern design, machining & fabrication, heat treating, finishing & coating. Our curved hose mandrel is a shaped metal core around which tubing or hose manufacturers build their high speed production assemblies. Our green sand casting method keeps mold production costs low due to the high reusability of the discarded metal.