Three common methods
Conveyor belt mechanical joint method
Generally speaking, the belt buckle joint is used. This joint method is convenient and convenient, and economical, but the joint has low efficiency and is easy to be damaged, which has a certain influence on the service life of the conveyor belt product. In the PVC and PVG whole core flame retardant antistatic conveyor belt joints, the product is generally used in products with 8 or less belts.
Conveyor belt cold bonding head method
Conveyor belt joint
That is, a cold-adhesive adhesive is used to make the joint. This joint method is more efficient and mechanical than the mechanical joint, and should have a better joint effect, but from the practical point of view, because the process conditions are difficult to master, the quality of the adhesive has a great influence on the joint. So it is not very stable. At present, the well-known adhesives in China are used in the domestically-used conveyor belts such as Shengka SK811 conveyor belt rubber and LDJ243 series.
Conveyor belt hot vulcanization joint method
Conveyor belt joints have proved to be the most ideal joint method in many years of actual combat, which can ensure high joint efficiency, and is also very stable, and the joint life is also long and easy to grasp. However, there are disadvantages such as troublesome process, high cost, and long joint time.
Folding edit this paragraph rubber hard reason
The reason why the rubber of the conveyor belt is hot and vulcanized is relatively hard.
After the joint is realized on the conveyor belt, it is often found that the joint portion is harder than other parts. The process of vulcanization of the conveyor belt is actually a process in which the vulcanized rubber continues to crosslink. Since it needs to be heated and pressurized during vulcanization, and it takes a long time, after a long time of vulcanization, the hardness of the vulcanized rubber will increase, so the joint part will be harder than other parts.
The strength at the conveyor belt joint is lower than that of the normal belt. Generally, when mechanically connected, the strength of the joint can only reach 40-50% of the strength of the belt. When the quality of the cold glue is better, the strength of the joint can reach 60-70%, and the strength of the hot joint can reach 80-90%. The joint method is correct and there is no quality defect). Since the strength of the joint is relatively low, if the bonding method is not correct, the strength of the joint will be lower, such as when the knife is opened, the next layer of cloth is damaged, the polishing is excessive, the length of the overlap is insufficient, the number of steps is insufficient, and the joint is glued. The performance of the rubber used is not good or has been caused by sulfur failure, excessive wire rope grinding, rusting of steel wire rope, etc., and the strength of the joint part will be greatly reduced. When used, the joint part is easily broken.
In addition, if the conveyor belt does not use the sealing glue, or the direction of the glue joint is wrong, the joint part is prone to cracking (surface glue part).