Introduction to curling and rewinding of film slitting machines

Choosing a suitable film slitting machine winding method is very necessary for the continuous production of high-quality films. Internal forces will be generated during the material curling process. Using improper curling methods may cause product quality problems or even scrap the film roll material. The choice of film winding method will consider many factors such as the size of the paper tube, the type of material and the quality of the finished roll. It is also very important to understand the torque, pressure and tension.
The surface curling and rewinding of film slitting machines is also called friction curling or contact rewinding. The film rewinding process is driven by one or more pressure rollers. The power pressure rollers contact the outer material of the roll to continuously apply pressure and friction to achieve Passive material collection. The tightness of the material can be adjusted by changing the torque of the power roller and the pressure of the pressure roller to maintain the appropriate hardness of the coil.
Compared with the center winding method, it can effectively eliminate the impact of static electricity and attached air layer on the film roll. The unwinding tension is output to the PLC through calculation, and the programmable controller outputs the calculated tension value to the driving roller. Since the diameter of the driving roller is constant and is not affected by the winding diameter, the roll can be maintained The tension of the material is stable. In addition, by driving the rewinding shaft through the rotation speed of the power roller, the surface rewinding and slitting machine is often more energy-saving than the central rewinding and slitting machine. This is an economical slitting and rewinding system.