Coated sand coated sand production method, mixed anatomy experienced dry mix, cold coating method, temperature coating, thermal coating method four stages, the current production of coated sand almost all thermal laminating method. Thermal coating process is the first raw sand heated to a certain temperature, and the resin respectively, Wuluo removal of aqueous solution and calcium stearate were mixed and stirred, cooled from crushing and screening. Due to differences in formulation, blending process is different. At present, domestic species, many coated sand production line, hand-feeding of semi-automatic production lines, about 2000 to 2300, the computer-controlled automatic production line also has nearly 50, to effectively improve production efficiency and product stability. Country in the 1950s began to study the application of coated sand and shell (core) processes resin sand recycling machine, until the mid-1980s, only a few plants using homemade shell coated sand for core production. Since then, the coated sand began as a commodity on the market. With the continuous improvement of raw materials, manufacturing equipment and manufacturing processes, continuously improve the quality of coated sand resin sand reclamation line of small, declining production costs, since the 1990s, the application of coated sand has been more rapid development, increasing product range resin sand reclamation equipment, and has formed series. At present, China's annual production of coated sand casting has reached 50 million tons, a total of hundreds of professional manufacturers. With the rapid development of China's automobile industry and mechanical products export needs, and the development of international markets casting, casting increasingly demanding high-quality, coated sand production applications will be rapid growth in the short term from the core entity theory speaking, the coated sand can produce almost all types, especially high-precision casting core entity. When using the wet coated sand, direct access to hot-box core making equipment and tooling resin sand regeneration, without having the original equipment and tooling to make any changes. When using dry coated sand, because of its mobility, the need for core box exhaust system, nozzle and core box seals for special treatment. Angle of repose principle can be used (coated sand repose angle of about 30o), coated sand into the sand shot resolved when the exhaust chamber and shoot do not shoot automatically when the sand coated sand whereabouts and other issues. Currently, the use of dry heat coated sand box core technology manufacturers are more resin sand reclamation line | Qingdao Heng (certified) | resin 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.