China's coated sand technology began in the mid-1950s of the 20th century sand coated sand core, the 1960s was once disabled. In the 1980s, due to the rapid development of automobile industry and the need for mechanical product exports, the quality of castings made a higher demand, thus contributing to the rapid development of coated sand production and application of technology [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%, 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 90 million tons, is widely used in automotive cylinder block, cylinder cover, intake manifold, various types of pipe fittings, pump and other complex castings. Country in the 1950s began to study the application of coated sand and shell (core) processes, until the mid-1980s, only a few plants using homemade shell core for the production of coated sand. Since then, the coated sand began as a commodity on the market. With the continuous improvement of raw materials, manufacturing equipment and manufacturing processes, coated sand quality is improving, declining production costs, since the 1990s, the application of coated sand has been more rapid development, increasing product variety, and has formed a series technology. 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 will be applied in the 20th century, the rapid growth of China's 50 in the short term Application era began coated sand and shell (core) processes, until the mid-1980s, only a few plants using homemade shell core for the production of coated sand. Since then, the coated sand began as a commodity on the market. With the continuous improvement of raw materials, manufacturing equipment and manufacturing processes, coated sand quality is improving, production costs fell coated sand processing, since the 1990s coated sand, coated sand has been more rapid application development, product categories growing, and has formed series. At present, China's foundry production reached 50 million tons of coated sand, a total of nearly one hundred professional manufacturer with annual production of coated sand. With the rapid development and export of machinery products require China's automobile industry, and the development of international markets casting, casting quality have become increasingly demanding, applications will be coated sand coated sand plant rapid growth in the short term, Qingdao Heng (certified), coated sand 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.