A brief history of the development of China’s sealing engineering technology (I)

The history of the development of rubber and plastic seals in China is very short, when the country was founded, the rubber and plastic sealing industry is simply a blank. The real golden age of China’s rubber and plastic industry is after the reform and opening up. Today I will tell you about the history of the development of engineering sealing technology with the theme of rubber and plastic seals in China.

First, the starting stage of engineering sealing technology
During this period of China’s construction machinery products hydraulic system working pressure is roughly 12-14MPa. used sealing system with seals are: 0-shaped rubber seal (NBR); iron shell a cowhide rotary oil seal; corrugated steel ten cork ten metal spring end seal; asbestos packing; asbestos ten rubber sealing gasket; V-shaped seal (cowhide ten phenolic ten rubber wood); V-shaped seal (NBR ten clip Fabric]: soft will be the genus sealing gaskets and so on.

Second, the start-up phase of engineering sealing technology
During this period the production of China’s main products of construction machinery hydraulic system working pressure is roughly 14-3.5MPa. its sealing system used in the seals to rubber and plastic seals are the main, eliminating the cowhide, asbestos fiber and corrugated steel ten cork end seals. The main types D are: 0-shaped seal (NBR, FKM); crawler D chassis with floating oil seal (metal ring dry 0-shaped figure); D inner package skeleton rotary oil seal Chuan BR, FKM, ZACM). Hydraulic and pneumatic reciprocating motion seals D are 0-shaped seal (NBR, FKM); U-shaped dense D injection ring (NBR, AU, BU): V-shaped seal (NBR ten sandwich fabric); cup-shaped seal (NBR ten sandwich fabric), etc.

In this 10 years, in order to meet the development needs of such as construction machinery, forging and pressing machinery, etc. using medium and high pressure hydraulic technology, the former Ministry of Machinery set up seven professional rubber and plastic seals production plant. In addition, in order to promote the development of sealing technology in China, the “National Technical Committee for Standardization of Hydraulics and Pneumatics I and the National Technical Committee for Standardization of Hydraulics and Pneumatics Rubber and Plastic Seals Standardization Sub-Technical Committee” (corresponding to the old ISO/TCI3/SC7) was formed in 1975 and 1979, as well as the Institute of Friction Fluid (corresponding to the old ISO/TCI3/SC7) and the Friction Society Fluid Seals Sub-Technical Committee.