Sealing strips are classified by vulcanization
(1) Non-continuous vulcanization method (after extruding the extruded strip according to a certain length, it is vulcanized in a vulcanization tank, and the extruded semi-finished rubber strip is placed in a mold for vulcanization);
(2) Continuous vulcanization method (microwave continuous vulcanization method, salt bath continuous vulcanization method, hot air continuous vulcanization method, etc.). A. Microwave continuous vulcanization composite sealing strip: Microwave vulcanization technology is a production technology widely applied after the foreign energy crisis in the 1970s. The microwave continuous vulcanization technology can not only produce composite rubber strips made of metal core, solid core rubber and sponge rubber, but also superior to other continuous vulcanization devices in terms of energy saving and work efficiency. This technology is recognized by the world as the best process for producing extruded articles. 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, so that not only heat is generated but also distributed uniformly, which is advantageous for improving product quality and greatly shortening the time for heating. B. Salt bath continuous vulcanization sealing strip: salt bath vulcanization adopts nitrite-containing salt bath system, which has a large environmental pollution and has been gradually eliminated. C. Hot air vulcanization sealing strip: hot air sulfur has been developed to strong wind type vulcanization, that is, high temperature, high speed hot air vulcanization (Tmax: 450 ° C and Vmax: 60 m / s) can also achieve the effect of flame pretreatment, and Security is greatly improved.