Gu Chang today to introduce in ductile iron foundry castings Feeding Process design principles: (1) small pieces or thin castings should be considered part of the external feeding, solidification shrinkage process requires external pressure to provide support; (2) Heavy Heavy or large parts of the piece castings or simply do not need feeding limited feeding; (3) the casting is not limited to the external feeding feeding; (4) Cold Heavy iron solidification rate can be adjusted at the hot spot Shanxi and casting temperature gradient wells, its role in feeding the casting is conditional. Gu Chang outlined in ductile iron foundry with your anti-theft covers: 1, bolt hole blocking technique method. Bolts, nuts blocked Shanxi hook hole covers manufacturing, but as long as a bowed head at both ends of the wire, inserted into two grooves under the bolt head inside, you can open and took the covers; 2, lock head key method. 3, fork joint linkage method. Gu Chang foundry located in Inoue's hometown - Kim Gu treasure. Shanxi Jinzhong City, Shanxi Taigu State Road 108 covers Which Hu village malleable Industrial Park, east too fast, convenient North Tongyu Qi-speed transportation and accessible. Shanxi covers offer, Shanxi covers, Chang-year foundry provided by Gu Chang in foundry. Gu Chang-year foundry (www.sxcnzz.com) strong, credible, in Jinzhong machining industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Chang and you work in the foundry into the brilliant, for a better future!