The cause of the vulcanized rubber hard

We realized on the conveyer belt joint but often find joint part is hard, than other parts of the conveyor belt vulcanizing bonding is actually the process of the vulcanized rubber to crosslinking process. Because of the need when sulfide heating, pressure, and need a long time, after a long time of vulcanization, with vulcanized rubber hardness increases, so will feel is harder than other parts of the joint parts

The strength of the conveyer belt joint is lower than normal with body strength. General mechanical way connection, the joint strength can only reach the belt body strength of 40-50%, cold way quality is better, the joint strength can reach 60-70%, and the intensity of hot glue joint can reach 80-90% (joint method is correct, no quality defects). Due to the strength of the joint part is lower, if the glue joint method is not correct, the strength of the joint will be more low, such as surgery, the wound and the next layer of cloth, polishing, the excessive lap length, number of steps used rubber, rubber joint performance is not good enough or has been excessive, wire rope, wire rope grinding sulfur cease to rust, etc., the strength of the joint parts will be compromised, when use, prone to disconnect joint parts.

In addition, the conveyor belt if you don't use sealing glue, or the direction of the adhesive joint error, joint areas prone to cracking (plastic parts).