China's coated sand technology began in the mid-1950s, the 1960s was once disabled. In the 1980s manufacturers of coated sand regeneration, due to the rapid development of automobile industry and the need for mechanical product exports, the quality of the casting of a higher requirement coated sand regeneration companies, thus contributing to the coated sand production and application of technology rapidly development [1]. 1986 Institute of Jinan Casting Forging technology first developed a new type of coated sand production technology, the amount of resin fell from 6 to 10 percent in the early 1980s to 3-4% renewable coated sand, close to the international advanced level in the same period. The rapid development of the early 1990s coated sand plant them all over the country, new products, new technologies continue to emerge in the 21st century, annual sales of coated sand industry has reached more than 900,000 tons of coated sand recycling equipment company, widely used automotive cylinder block, cylinder head, intake manifold, various types of pipe fittings, pump and other complex castings. Phenolic resin sand regeneration is based on the principle of regeneration of waste sand at high temperatures, enabling crystal-shaped silicon oxide silica sand - the structural variants in the same quartz crystal transformation from α β crystal form, reducing the thermal expansion coefficient of silica sand. Reclaimed sand used, can reduce the deformation of the casting, burrs and other defects. When the waste sand reclamation, sand the surface of the resin film also makes burning and silica impurities such as metal oxides stripped improve sand silicon-oxygen bond activity. When can improve regeneration instead of the original sand coated sand coated sand production, increased sand strength to prevent sticky sand casting and porosity. Coated sand recycling equipment company _ Qingdao Heng (certified) _ Chongqing coated sand regeneration provided by Heng Machinery Co., Ltd. Qingdao. Qingdao Heng Machinery Co., Ltd. (www.thjidian.com) is Qingdao, cleaning, cleaning equipment leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Qingdao Heng led the staff warmly welcome all inquiries negotiations to create a better future Qingdao Heng.