Rubber sealing strips can be classified according to se […]
Rubber sealing strips can be classified according to several methods such as cross-sectional shape, vulcanization method, application location and purpose, and materials used.
(1) Discontinuous vulcanization method (after cutting the extruded rubber strip to a certain length, put it in a vulcanizing tank to vulcanize, and then make the extruded rubber strip semi-finished product
Put into the model to vulcanize);
(2) Continuous vulcanization method (microwave continuous vulcanization method, salt bath continuous vulcanization method, hot air continuous vulcanization method
Several methods such as chemical method).
A. Microwave continuous vulcanization composite sealing strip: Microwave vulcanization technology is a production technology applied and widely promoted after the foreign energy crisis in the 1970s. The use of microwave continuous vulcanization technology can not only produce composite strips made of metal core, solid rubber and sponge rubber, but also has advantages over other continuous vulcanization devices in terms of energy saving and improving work efficiency. This technology is recognized by the world as the best process for producing extruded products. The characteristic of microwave heating is that heat is directly generated in the object to be heated, instead of being input from the outside as usual. This not only generates heat quickly, but also distributes uniformly, which is beneficial to improve product quality and greatly shorten the heating area
B. Salt bath continuous vulcanization sealing strip: The salt bath vulcanization adopts a salt bath system containing nitrite, which pollutes the environment and has been gradually eliminated.
Vulcanization (Tmax: 450°C and Vmax: 60m/s) can also achieve the effect of flame pretreatment, and the safety is greatly improved.