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Polyurethane rotating casting machine without mould part 1 Sep 04, 2017 Casting process is to melt the metal into a certain required liquid and poured into the mold, after cooling solidification, scrubbed treatment of the predetermined shape, size and performance of the casting process. Casting process can be divided into three basic parts, namely casting metal preparation, mold preparation and casting treatment. Casting metal refers to the metal material used for casting castings in foundry production, it is an alloy composed of a metal element and other metals or non-metallic elements, and is used to be called casting alloy, mainly cast iron, cast steel and cast nonferrous alloy.