The main selection of high-quality coated sand natural quartz sand as raw sand, thermoplastic phenolic resin, methenamine and enhancer for raw materials. Depending on the technology needs of users, the curing speed, stripping, mobility, collapsibility, the casting surface finish, storage and other aspects of appropriate adjustments to match. Is one of the cars, tractors, hydraulic parts and other materials the best shape. The main problems in China coated sand detection is (1) detection means most companies are not perfect. Basic stay in detecting temperature strength, melting point, particle size and volume of the primary stage of hair; (2) domestic coated sand testing equipment accuracy and stability is not high, the same kind of equipment of different manufacturers use in field conditions coated sand regeneration, coated sand detected relatively large differences in performance sometimes, for example, the tensile strength at room temperature can vary more than 10 kilograms of coated sand regeneration models, hair volume difference of more than 5 ml. Currently more advanced testing equipment including high temperature coated sand performance tester coated sand regeneration factory, send gas meter, hot strength tester, phenolic resin sand reclamation is based on the principle of regeneration of waste sand at high temperatures, enabling crystal silica sand shaped silicon oxide - quartz to the same structural variants β crystal transformation from α crystalline 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 oxide coated sand recycling plant peel, improve silicon-oxygen bond active silica sand. 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 plant, Qingdao Heng (certified), 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.