(1) General Category coated sand made of quartz sand, thermoplastic phenolic resin, hexamine and calcium stearate, without concerning additives. For the production of cast iron in general. (2) high-strength low gas category is the ordinary coated sand coated sand replacement products, by the addition of additives and use of new technology related to the preparation of coated sand regeneration plant, its strength than ordinary coated sand 30% or more gas evolution was significantly reduced coated sand recycling equipment company, for the production of complex precision iron castings. Easy collapsibility coated sand: it is for non-ferrous metals (especially aluminum) is not easy to sand casting and developed a coated sand. The sand also has good strength has excellent low temperature Collapsibility. With its production of non-ferrous metals (aluminum, copper alloy, etc.) castings, the casting does not need to be re-heated sand, just pouring cooling after casting coated sand regeneration after 24 hours, you can SHAKERS. Centrifugal Casting coated sand: the coated sand suitable for centrifugal casting process, can it replace paint production centrifugal casting and other casting materials according to the diameter size and technical requirements are different, it can be processed into different performance centrifugal casting coated sand. Differs from other types of coated sand, coated sand is the number of high density, low gas evolution and gas evolution is slow in coated sand production areas should be strengthened following two aspects: (1) low fat coated sand pollution, mainly from the following aspects: ① reduce the amount of resin and curing temperature; ② coated sand to improve the overall performance, especially in high temperature performance; ③ strengthen research and pollution-free phenolic resin alternatives;. (2) increasing the regenerative capacity of coated sand coated sand regeneration equipment manufacturers _ Qingdao Heng (certified) _ coated sand regeneration 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.