In order to ensure the service life of the interface, the interface will not be torn apart when the belt
runs off-track. The method shown in (a) can be adopted to solve the problem. That is, according to the running direction of the belt, the mouth is made into/convex 0 shape.
Step production interface step production is the key to cutting. After calculating, measuring and scribing, excess rubber and cloth layers can be removed. When operating, the size of the knife force and the depth of the stroke must be strictly controlled. If you cut too deep, you will damage the fabric layer of the retained part, resulting in partial fracture in the future. On the contrary, it is difficult to remove the excess rubber and cloth layer.
Therefore, this is the key technology of bonding process, must be operated by experienced people or on-site command. After the grinding of the joint surface is torn, the initial match is carried out, and the parts that do not coincide are corrected. Then the grinding of the joint surface should be carried out. The purpose of grinding is to knock off the adhesive rubber on the cloth layer, and wear the cloth layer at the same time, in order to increase the roughness of the cloth layer, increase the bonding area, and lift
Effect of high bonding strength. It is proved by practice that the bonding strength increases with the increase of roughness under certain conditions.
But from the microscopic point of view, if the roughness of the bonding surface is too large, convex and concave phenomenon will occur, which will cause poor contact of the bonding surface, form defects, and reduce the bonding strength. Especially to the poor fluidity of the adhesive, the impact is more significant. Therefore, when grinding, it is necessary to wear off the residual rubber on the cloth layer, and the cloth layer can not be worn through, otherwise it will affect the bonding effect. At the same time, it may also form the hidden trouble of belt joint local fracture.
In addition, keep the bonding surface clean to prevent contamination before bonding. The selection of adhesives and their sizing adhesives are generally bottled, and the curing agent mixed after stirring should be paste. Experience believes that the adhesive used for bonding conveyor belt joints is better to dilute some. As the thin coating is less prone to flow and creep, it is less likely to produce bubbles and defects, and the internal stress at the interface will be less. Therefore, it is beneficial to improve the adhesion of the interface. But when the adhesive layer is too thin, it is easy to form a lack of glue, the coating is not continuous, which can also reduce the bonding strength. So, daub adhesive, should be in the premise of ensuring that there is no lack of glue, coating thickness as thin as possible some better.
The bonding time determines when the two parts of the interface are overlapped, which will directly affect the bonding effect. According to the requirements is after the application of adhesive to non-stick hand can be lap, too early or too late will also cause the reduction of bonding quality. If in summer, the airing time after the joint is coated with 1 glue can not be too long, at this time, the solvent contained in the adhesive volatilizes faster, and the process of curing is shorter. Therefore, hurry up and complete the operation. In winter, the temperature is low and the solvent in the adhesive coating is slow to volatilize. The drying time can be extended appropriately. When necessary, the heating can be assisted to promote the volatilization so as to speed up the progress of the work. When the joint is overlapped, it is necessary to ensure that the center line at both ends of the belt is in the same straight line, and each step is well anastomosed to avoid repeated uncovering and sticking due to dislocation. Once the joints are lapped, start at the center line with a hammer and work both ways. It is best to clamp the joint surface with two flat steel plates and tighten it with bolts. After curing the adhesive, it will be loosened again, so that the bonding effect is better.
Transportation belt bonding operation is difficult and technical, so it is necessary to choose the appropriate interface shape according to different working conditions, reasonably determine the lap length, with high performance, high strength adhesive, through scientific and meticulous operation, to receive the ideal effect.