Coated sand by Dr. Ke Luoning Germany during World War II invention, the process is the powder is mixed with thermosetting phenolic resin coated sand renewable raw sand machinery, curing when heated. After developing into a thermoplastic phenolic resin plus latent curing agent (methenamine) and lubricants through a certain process formulated into a film-coated sand coated sand regeneration companies, when coated sand coated sand surface heat resin is melted, at 乌洛托 coated sand product decomposition of methylene action, the molten resin is rapidly changing from a linear structure into the body structure is not melted, so that the coated sand curing. The basic principle is to use thermal regeneration of old sand pretreatment and boiling thermal coated sand regeneration regeneration furnace equipment manufacturers, the first vibration sand crushing and magnetic separation, and then boiling regenerative furnace roasting coated sand regeneration The company, the sand and then through the insulation, cooling, screening can be reused. After recycling the regenerated sand thermal performance up: loss on ignition (mass fraction) <0.3%; particle concentration ratio (mass fraction) 80-90%; gas evolution <3mL / g. In order to ensure the quality of coated sand core, we must first ensure that the quality of coated sand, and various performance indicators coated sand must meet production requirements, the test method can be found in the machinery industry standard (JB / T8583.1997 coated sand casting ). In the coated sand production areas should be strengthened following two aspects: (1) hair coated sand pollution, mainly from the following aspects: ① to reduce the amount of resin and curing temperature; ② coated sand to improve the overall performance, especially ③ strengthen pollution research phenolic resin substitutes; high temperature performance;. (2) increase the regenerative capacity of coated sand coated sand coated sand production equipment package 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 The thermal regeneration equipment prices in the 1200-1600 yuan, coated sand regeneration cost 65-90 yuan / ton, so the cost can not be for the domestic enterprises coated sand casting manufacturer regeneration, regeneration coated sand, 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!