Coated sand (coated sand). I.e. before molding sand surface covered with a layer of solid resin film molding sand or core sand. There are two methods of cold and hot coating process: Cold method using the resin is dissolved in ethanol and added methenamine in sand process, so that the two surfaces coated sand, volatile ethanol, was coated sand; hot France preheated to a temperature of the sand Shandong coated sand recycling equipment, plus resin melted, stir in the resin-coated sand surface coated sand production line manufacturer of renewable, plus methenamine solution and lubricants, cooling, crushing, Screening was coated sand. For steel, cast iron (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 of Qingdao coated sand regeneration equipment, its strength than ordinary coated sand 30% more hair volume was significantly reduced for the production of complex precision iron castings. Qingdao coated sand recycling equipment | coated sand regeneration | Qingdao Heng Heng Machinery Co., Ltd. is provided by Qingdao. 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!