Country in the 1950s began to study the application of coated sand and shell (core) processes resin sand recycling equipment, 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 coated sand has been more rapid application development, product categories growing resin sand reclamation equipment manufacturers and have been formed. 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 rapid growth in the application of high temperature coated sand in the short term : This generally refers to a large sand coated sand thermal strength, heat long time, high temperature deformation, rather than its high refractoriness. It is through a special formulation process technology (usually when a certain amount of inert material such as silica sand coated sand milling, high chrome ore, carbonaceous material or other inert materials, etc.) small resin sand regeneration lines to produce excellent The new high-temperature performance and integrated coated sand casting performance. High temperature, high strength, low inflation, low gas, gas, etc. slow hair. Especially for complex thin-walled precision iron castings (such as automobile engine block, cylinder head, etc.) as well as the high demand of castings (such as container train horn and brakes buffer housing, etc.) production, which can effectively eliminate the sticky sand, deformation, thermal cracking and porosity and other casting defects of iron-type clad sand technology was developed first in the small foundry business and successful application. The late 1970s, China's first iron built with Sand casting production lines. 80 years later, China's iron-type cladding sand casting process and application of basic research teams have been formed resin sand reclamation businesses, and get faster development. At present, China has hundreds of companies with Sand cast iron used in production, with an annual output of iron with Sand casting about 100,000 tons (mainly crankshafts, camshafts, gears and export castings, etc.), the annual consumption of coated sand approximately 20,000 tons. Resin sand reclamation equipment | Weihai resin sand regeneration | provided by Qingdao Qingdao Heng Heng Machinery Co. 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!