China's coated sand technology began in the mid-1950s, 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 resin-coated sand production technology sand recycling equipment, resin amount decreased by 6 to 10 percent in the early 1980s to 3-4% of small resin sand reclamation line, close to the same period the international advanced level. 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. (1) the general category of quartz sand coated sand, thermoplastic phenolic resin, methenamine and calcium stearate, without concerning additives. Generally applicable to the production of cast iron. (2) high-strength low gas coated sand is a common type of replacement products resin coated sand sand reclamation machine by adding additives and use of new technology related to the preparation, its strength than ordinary coated sand high above 30% gas evolution was significantly reduced for the production of complex precision iron castings. The thermal method centrifugal casting process in metal type (iron type) in the conventional centrifugal casting process rough shape, mainly for the production of Tube rotator casting, first in the iron mold cavity surface coated layer of paint in order to facilitate hanging modulo . In recent years, has developed a suitable alternative coating production centrifugal casting coated sand. Because of its exhaust is less effective, it requires a thin wall (about 3mm), and often using double sand, and casting the contact surface with sand (70/140 mesh), the outer layer of coarse sand (50/100 mesh) resin sand resin sand regeneration recycling machine _ _ provided by Qingdao Qingdao Heng Heng Machinery Co., Ltd. Qingdao Heng Machinery Co., Ltd. (www.thjidian.com) strong, credible, Shandong Qingdao Cleaning equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Qingdao Heng and you hand into the brilliant, for a better future!