Industry News

The function of the drive roller set of the stretch film rewinder is to determine the unwinding speed and the tension of the printing material in the printing part.

The driving roller group is generally composed of two or three guide rollers.

When driving with two rollers, one guide roller is forced to drive, and when driving with three rollers, there are two driving rollers. The surface of the other driven roller is generally rubber or other non-metallic materials.

The surface speed of the driving roller and the part roller of the stretch film rewinder must maintain a certain proportional relationship. The drive roller of the stretch film rewinder currently produced and used is generally driven by the main drive gear chain, and the diameter of the drive roller is smaller than the pitch diameter of the drive gear, so that its surface linear speed is lower than the plate cylinder.

Due to the different tension-extension characteristics of different materials, the characteristics of the same material are not the same, so many stretch film rewinders are equipped with variable speed devices on the driving rollers to accurately adjust the driving roller and the stretch film according to actual needs. The relationship between the speed ratio of the rollers of the reel.