Phenolic resin sand regeneration is based on the principle of waste sand coated sand under high temperature regeneration regeneration wholesale, make crystal-shaped silicon oxide silica sand - the quartz crystal form transformation from α-coated sand in the same variant of β crystal structure, reduce the thermal expansion of silica sand rate. Reclaimed sand used, can reduce the deformation of the casting, burrs and other defects. When the waste sand reclamation, sand the surface of the resin film also makes burning and silica impurities such as metal oxides stripped improve sand silicon-oxygen bond activity. When can improve regeneration sand instead of the original production of coated sand coated sand coated sand regeneration of the company, increasing the intensity of sand to prevent sticky sand casting and porosity. Century has come, this is a modern high-tech rapid development and product quality, environmental protection era of fierce competition. People for the requirements of their own living environment increasingly high, companies should follow the requirements of environmental laws to organize production. Foundry industry is the machinery industry pollution, energy consumption, and poor working conditions in the industry. 21st century styling, core technical progress key issues should be the development of non-polluting, less pollution, low production cost, energy-saving materials and labor conditions are good modeling, core processes. Therefore, coated sand technology in the future direction of development should be: (1) reduction of environmental pollution coated sand, the development of low free phenol, low gas, less pollution phenolic resin, protecting the natural environment for human survival. (2) study of phenolic resin substitutes. Because phenolic resin coated sand expensive renewable manufacturers, to develop a new type of cheap binder is a priority. (3) further research and improvement of rheological phenolic resin, and constantly improve the reaction resin coating and curing properties. (4) study the performance of resin synthesis process control, resin macromolecules and small molecules suitable grading also need further research to improve the strength and toughness and resistance to shelling resin. (5) further study the reuse of the old sand. With the increasing amount of coated sand, many manufacturers have reached several thousand tons more than the amount of research coated sand sand reclamation and reuse old already has great practical significance, which can not only improve the performance of coated sand, and but also to save costs, reduce waste materials coated sand environmental pollution recycling processing | Qingdao Heng (certified) | coated sand 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.