Extrusion Blown Film Winder is the last process of Plastic Film Blowing Machine to produce plastic film products. To maintain the tension of film and make it easy to use for post-processing, the role of Extrusion Winder in Plastic Blown Film Line is extremely significant. Ensure the film which came from the Take-Up Unit is flat type and the final step should keep the film stably without any uneven. Film Winder. Further, the line speed (take-up speed) is the primary device to control the film thickness and the stability of film as well.
After the processing of Take-Up Unit, the film becomes extremely flat and reaches the first step of Extrusion Blown Film Winder. The main function is to collect the film perfectly without uneven edges on the collecting roll. A high precision Blown Film Winder is to maintain the average air content value between each layer of film to avoid uneven and unregularly positions. On the process of Blown Film Winder, the film first passes Surface Winding which made of rubber and steel bars. By the interaction of these two bars, it stretches the film to maintain its tension. Next, the film sticks on the rotating roll which called on-line Roller to collect it. Leading the plastic film to follow its direction in order to winding it. Then, when the on-line roller reaching the required meters or wound-up diameters, the Shifting Forks replace the position of Standby Roller for the next winding. At this time, we usually use Knifes to cut the well-wrapped roll down. Besides, for the different use of film, Extrusion Film Winder will equip with Slitting Knife and Side Open Knife to cut. Side Open Knife splits the film into two parts for the products such as cling wrap, shrink film, etc. And Slitting Knife cuts the film into strips for the different demand of size. Further, with the option of automatic system, it increases the higher efficacy for Winding Unit.