High temperature coated sand: The sand generally refers to large-coated sand thermal strength, heat-resistant long time, high temperature deformation, coated sand, and not to its high refractoriness. It is through a special formulation technology process (usually when a certain amount of inert materials such as silica sand coated sand mill, high chromium ore, carbonaceous material or other inert materials, etc.), coated sand equipment to produce excellent The new high-temperature performance and integrated coated sand casting performance. High temperature, high strength, low inflation, low gas, slow gas evolution and other characteristics. Especially for complex thin-walled precision iron castings (such as automotive engine block, cylinder head, etc.) as well as demanding castings (such as container train horn and brakes buffer housing, etc.) production, can effectively eliminate the sticky sand, deformation, thermal cracking and porosity and other casting defects of quality coated sand core in addition to the geometry, dimensional accuracy, surface quality and thickness of the shell sand core, but also by observing the color of the sand core to test the core sand curing conditions. The normal situation is that the appearance of the sand core should be uniformly brown, center yellow, when burnt brown and even black appearance presented, insufficient hardening look yellow, white center with Sand cast iron main process parameters: iron type wall thickness 25mm, covered sand thickness 5-8mm (for small bore ductile iron crankshaft); iron-type mass is generally about five times the quality of castings; iron ore ratio (casting quality and the amount of consumption of coated sand ratio) 6-7. Iron-type clad sand molding methods (ie sand cover available) have shot molding and compression molding sand two kinds of coated sand company, the former now used more, as an ordinary coated sand coated sand, particularly suitable for large production; the latter applies to any single quality large (iron type size of several meters in length) of the crankshaft, etc., covering a variety of fluidized sand Sand. The former shooting sand and coated sand selection pressure thickness, and when shooting sand pressure 0.2-0.6MPa, coated sand thickness is 4-5mm, its maximum density phenolic resin sand reclamation is based on the principle of waste sand regeneration at high temperatures, make the oxide form of silicon crystal silica sand - quartz crystal form by the α β variant change to the same crystal structure, reducing the coefficient of thermal expansion of silica sand. Reclaimed sand used, can reduce the casting deformation, burrs and other defects. When waste sand regeneration, supply coated sand, sand the surface of the resin film also makes combustion silica and metal oxides and other impurities stripped, silica sand to improve the silicon-oxygen bond activity. When can improve regeneration instead of the original sand coated sand coated sand production, increased sand strength to prevent the casting sticky sand and porosity. Coated sand resin sand, Qingdao Heng (online consultation), coated sand by Qingdao Heng Machinery Co. Qingdao Heng Machinery Co., Ltd. (www.thjidian.com) is in Qingdao, Shandong 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 leadership with the staff warmly welcome all inquiries negotiations to create a better future Qingdao Heng.