Cast iron products mainly use coated sand technology, coated sand is a kind of high quality selected natural sand as sand base, through special properties of resin film coating system and the most ideal process technology, according to the technical needs of different users, strive to be the most perfect combination in room temperature performance, high temperature performance, collapsibility, liquidity, casting surface roughness and so on. Dalian Yucen Machinery Co., Ltd., using advanced molded sand shell mold, Production series of auto parts, the main products are: shell reduction, wheel core, automotive engine accessories, hydraulic parts and other industry products.