Gu Chang-year foundry mainly produces ductile covers, rain grate and so on! Ductile iron manhole covers is a product of, ductile spherical graphite obtained through ball and bred deal effectively improve the mechanical properties of cast iron, especially to improve the ductility and toughness, resulting in higher strength than steel. Address: Taigu County, State Road 108 towns Hu Dong village crossing. Gu Chang describes the design principles in foundry iron cover of the cover: one, how much plastic surface covers ductile casting, molding material can encase in terms of scope, the surface structure of the plastic parts can be met in the mold contact at the molding. Second, modification, if the level of use of mechanical clamping saw plastic parts amputated side ductile cast covers manufacturers in the height direction, at least 6 ~ 8mm margin. Other finishing work, such as grinding, cutting or laser jet, it must be left margin. The gap between the knife-edge die cut line minimum, the distribution width punching die when trimming is very small. Third, the geometry of the design ductile cast covers Which is good, design, often considering the dimensional stability and surface quality. Four, dimensional stability, in the molding process, contact with the mold surface and better dimensional stability than plastic mold part to leave. Ductile cast covers pictures, Chang-year foundry (certified), Luliang ductile cast manhole cover provided by Gu Chang in foundry. Gu Chang-year foundry (www.sxcnzz.com) is Jinzhong, machining leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Chang-year leadership in the foundry staff warmly welcome all inquiries negotiations to create Chang foundry in a better future.