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 ethanol dissolving the resin sand resin regeneration principle, and join in the sand methenamine process, so that the two surfaces coated sand, volatile ethanol, was covered membrane sand; thermal preheating the sand to a certain temperature resin sand production line regeneration, plus resin melted, stir in the resin-coated sand surface, plus methenamine solution and lubricant small resin sand regeneration lines, cooling, crushing screening was coated sand. For steel, cast iron coated sand recycling has been a topic of concern for the majority of experts, the current coated sand regeneration equipment is expensive and regeneration efficiency is not high, productivity is 5 tons / hour of thermal regeneration equipment prices in 1200-1600 ten thousand yuan resin sand regeneration, regeneration coated sand will cost 65-90 yuan / ton, so the cost can not be cast for domestic enterprises generally accepted. So the development of economic and efficient coated sand recycling equipment has a broad market prospect in coated sand production areas should be strengthened following two aspects: (1) hair coated sand pollution, mainly from the following aspects: ① reduce resin added amount and curing temperature; ② coated sand to improve the overall performance, especially high temperature performance; ③ strengthen research polluting alternatives phenolic resin;. (2) increase the regenerative capacity of the resin-coated sand sand reclamation machine | Weifang resin 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!