Adhesive properties have a great impact on the quality of coated sand, people have been working on how to improve the performance of phenolic resin, and to find alternatives to phenolic resin. Foreign countries have developed special resin different properties, such as high strength, low gas resin, easy collapsibility coated sand recycling equipment manufacturers, there are also reports of a modified polyester resin, but did not get round to promote, so far is still widely used modified phenolic resin. China in recent years in research and development Phenolic resin coated sand faster, has developed a different use for the production of modified phenolic resin coated sand by Dr. Ke Luoning Germany during World War II invention, the process Process is powdered thermosetting phenolic resin mixed with the original sand coated sand regeneration machine production line, curing when heated. Later developed into a thermoplastic phenolic resin plus latent curing agent (methenamine) and lubricants through a certain coating process formulated as coated sand coated sand recycling equipment manufacturers, when heated coated sand coated sand surface The resin is melted at 乌洛托 coated sand product decomposition methylene action, the molten resin is rapidly changed from a linear structure into the body structure is not melted, so that the coated sand curing. Making entity of the core theory, coated sand can produce almost all types, in particular precision casting core entity. When using wet coated sand coated sand reclamation, direct access to the hot-box core making equipment and tooling, without having the original equipment and tooling to make any changes. When using dry coated sand, because of its mobility, the need for the core box Exhaust, nozzle and core box seals for special treatment. Available angle of repose Principle (coated sand repose angle of about 30o), coated sand into the sand shooting resolved exhaust chamber and did not shoot when shot at sand coated sand automatic whereabouts and other issues. Currently, the use of dry-coated sand hot box core technology manufacturers more coated sand recycling machine | coated sand regeneration | Qingdao by Qingdao Heng Heng Machinery Co. Qingdao Heng Machinery Co., Ltd. (www.thjidian.com) strong, credible, in Qingdao, Shandong 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!