Common coated sand: its composition is generally, methenamine, and calcium stearate is comprised of silica sand novolac resin, without relevant additives. The resin is usually relatively high amount at a certain strength requirements, do not have high temperature, low inflation, low gas and other characteristics suitable for some less demanding, simpler structure of cast iron production. High strength, low gas coated sand: is based on ordinary coated sand by adding the relevant characteristics of "additive" and the adoption of a new preparation process, so that the amount of resin-coated sand regeneration dropped significantly reduce gas evolution and can delay the hair air speed. The coated sand with high strength, low inflation, low gas, gas and other characteristics of slow hair, especially for iron castings, steel castings in small and medium volume requirements for low-fat sand core, such as body temperature coated sand cores Sand: The sand coated sand generally refers to thermal intensity, long time resistant, high temperature deformation, rather than its high refractoriness. It is regenerated by the Shandong coated sand special process formulation technology (usually when a certain amount of inert materials such as silica sand coated sand milling, high chromium ore, carbonaceous material or other inert materials, etc.), produced 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 of coated sand regeneration, can effectively eliminate sticky sand, deformation, thermal cracking and porosity and other casting defects (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 class ordinary coated sand coated sand replacement products, by adding additives and use of new technology related to the preparation, its strength is higher than 30% more than ordinary coated sand, gas evolution was also significantly reduced, for the production of complex precision iron castings. Coated sand regeneration manufacturers _ Qingdao Heng (certified) _ 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.