The traction device on the extrusion film blowing production line is driven by a motor, and the traction steel roller is driven to move through the reduction box. There are two traction rollers: one is a driving roller and the other is a steel roller; The other is a rubber roller, which is a passive roller. When the rubber roller works, it is pressed on the active steel roller to clamp the film. They pull the film extruded from the molding die, inflate it, cool it, solidify it and transport it to the coiler. The traction speed of the active steel roller is determined by the technological conditions of extrusion film blowing. In the whole production process, the driving roller can adjust the speed stepless according to the requirements of process conditions, which meets the production process requirements and ensures normal production. First, let's look at the components. The traction device on the extrusion blow film production line is driven by a motor, which drives the traction steel roller to move after being decelerated by a gearbox. There are two traction rollers: one is the driving roller, that is, the drum; The other is a passive rubber roller with a rubber layer, a traction roller. The second function of the device is that the rubber roller presses on the active steel roller to clamp the film when working. They stretch, expand, cool and solidify the film extruded from the die and transport it to the winder. The drawing speed of the driving steel roller is determined by the technological conditions of extrusion and film blowing. In the whole production process, the driving roller can change speed continuously according to the requirements of process conditions to meet the production process requirements and ensure normal production. Working principle of traction roller: 1. After assembly, the contact lines of the surfaces of the two traction rollers should be perpendicular to the center lines of the molding die, the gas ring and the herringbone splint, so as to ensure that the film bubble tube at the extrusion die always runs smoothly along the center line. 2. The distance between the pulling roller and the die opening should not be less than 3 times the diameter of the film bubble tube. 5 times to ensure the full cooling of the membrane bubble tube. 3. The contact force between the rubber roller and the steel roller surface should be uniform, and the traction force on the whole roller surface should be equal, so as to prevent the bubble tube from leaking. 4. The traction speed is stable, stepless speed regulation is possible, and the speed regulation can make a smooth and smooth transition. 5. Several guide rollers and flattening rollers should be added between the traction roller and the take-up roller, and tension rollers should be added when necessary to ensure that the take-up film bundle is flat and the film cloth is elastic. The above is my personal opinion, I hope it will help you.