Gray iron castings with excellent casting of complex parts can be made, generally have good machinability. Also has good wear resistance and vibration, low prices. Resin sand casting is also a common machine tool castings, ductile castings and also different is that the raw sand and resin mixture of resin sand, after casting, through this process of casting resin sand castings have a smooth surface size and high precision, and high resin sand mold requirements, because the quality of castings depends on the quality of the basic appearance of mold. , Solid foam casting foundry casting real look polystyrene foam applications taste furans Resin Sand modeling. And ductile castings different when the liquid metal poured into the mold, the foam looks like rapid gasification of liquid metal at high rambling role eliminate burning husband, liquid metal to replace the original position occupied by the plastic foam Wang, cooled and solidified into look the same shape real machine cast iron castings and gray iron castings into heat castings, casting these two products as higher-quality products, has been widely used in foundry and related industries