China's coated sand technology began in the mid-1950s of the 20th century ordinary coated sand regeneration, 60s once disabled. In the 1980s, due to the rapid development of automobile industry and machinery exports of coated sand recyclers need for a higher quality of the casting requirements, 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% coated sand recycling equipment, close to the international advanced level in the same period. The rapid development of the early 1990s, the country's factory-coated sand coated sand up regeneration, 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 automobile block, cylinder heads, intake manifolds, all kinds of pipe fittings, pump and other complex castings. The basic principle is to use thermal regeneration of old sand boiling thermal pretreatment and regeneration furnace equipment, the first of the old sand crushing and magnetic separation vibration, then fired in boiling regenerative furnace, sand and then through the insulation, cooling, Screening can be reused. After recycling the regenerated sand thermal performance up: loss on ignition (mass fraction) <0.3%; particle concentration ratio (mass fraction) 80-90%; gas evolution <3mL / g. In order to ensure the quality of coated sand core, we must first ensure that the quality of coated sand, and various performance indicators coated sand must meet production requirements, the test method can be found in the machinery industry standard (JB / T8583.1997 coated sand casting ). Coated sand renewable supply, 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.