Zhejiang Dongbin Rubber Machine Screw Co.Ltd is one of ten screw corporations in Zhou Shan .We are specializing in producing screw and barrel for both pin-type hot-feed and cold-feed extruder. The production capacity is over 1500 sets per year. It has been entitled “advanced private enterprise in Zhou Shan” many times. Equipped with advanced machines , such as drilling machine , boring machine for deep hole process , NC milling machine and other precise equipments, we have advanced technique and over ten years’ manufacturing experiences for barrel and screw of rubber machinery. The raw material is 38CrMoAIA from famous Bao steel company.The products are made by hardening, tempering, forming, correct grinding, surface nitriding, bimetal spraying and polishing . Our products have the character of better precise , abrasion resistance, corrosion resistance.We are able to desigh and manufacture according to customers’ sample and special requirement.At the same time we can repair old worn screw and barrel by using bimetal recovery technology. After repairing, the life time can be increased by three to five times than normal nitriding one. We participate in many domestic and oversea exhibition, and provide high quality and best price products to customers. Since 1997, we have been providing barrel and screw for Guilin Rubber Institute and other Guilin OEM rubber machinery..Also our products have been provided to American RMS machinery, Shanghai Jinyuan, Michelin, BRIDGESTONE, Yokohama Tire, SUMITOMO Tire, Giti Tire, Cooper Chengshan Tire, DOUBLE COIN Holding LTD, Guizhou Tire Group, Triangle Group, Aeolus Tyre etc , and have good reputation from customers. With a group of quality inspection staff and advanced testing equipment, We has set up complete quality system and are ISO9001 :2000 certified from 2003 .The products strictly conform with the standards: JB/Y8538-1997. “Offering best quality product and service to our customers” is our aim.