The old method, the disadvantage of this method more production of rubber products, there has been a series of shortcomings, the article is weighed stereotypes - the import NBR nitrile seal ring molding method and O-rings and other sealing products 1) molding method imports filled rubber mold process is performed after the mold cavity, in order to prevent waste arising from lack of material, methods used to make the plastic material quality pre-weighed taken significantly larger than the finished product quality, and the remaining gum can not reused to form burrs loss; at the same time remove the burr on the finished product, but also consume complementary human resources; molding process products can not achieve mechanization and automation, the dragon it is thick-walled products, curing cycle lasts quite long . 2) rubber injection molding method - the current O-rings and other sealing products molding method used rubber injection molding of plastic material is preheated by injection molding machine screw or plunger, through the nozzle high pressure, high speed injection mold type chamber, and vulcanization molding production methods. Rubber injection molding process is a new method developed on the basis of molding method. Rubber injection molding curing process is the biggest characteristic cure cycle is short, less flash, high production efficiency; reduce production preparation process, greatly reduce labor intensity, Long complexity of rubber for large, thick-walled, thin-walled and shape product effect is more significant. It is the molding and curing process into one simple process, to improve the mechanization degree of automation, the molding process repeatable, uniform product quality, improve the quality, it can improve the economic value of rubber products and rubber industry, and has broad Prospects.