What aspects does the slitting machine need to do to cut the film?

In order for the slitting machine to cut the film well, we need to do the following aspects well.
Choosing the right film slitting machine blade
Slitting machine blade selection plays a vital role in cutting the film well. Generally speaking, you can refer to the thickness of the film. For films below 20um, use a 0.2mm square blade. For films between 20 and 34um, use a 0.4mm square blade. For films with a thickness above 35u, it is recommended to use a round blade. In addition to thickness, the selection of blades should also consider the performance and material of the film, and keep trying in practice to obtain the best slitting effect.
Blades should be kept sharp for daily use
A dull or damaged blade results in wasted material. According to the actual wear and tear of the blade, set a certain film slitting length and replace it in advance. The square blade can be scrapped directly after confirming that all four corners have been worn. If the round blade is found to have chips or burrs, stop using it. Remove the blade and grind it sharply before continuing to use it.
Choose the appropriate slitting process according to the film type
The slitting machines produced by Kesheng Machinery adopt appropriate slitting processes for each film performance and specification, and are quantified into slitting machine parameters such as tension, speed and other indicators.
If the slitting machine speed is too slow, it will affect the production efficiency. If the slitting machine is too fast, it will affect the slitting quality. When the film is running at high speed, it is easy to have quality problems such as stripes, deviation or mis-layering. Controlling the appropriate slitting speed is the key to improving the film quality. An important means of yield rate. In addition, the mutual tension between unwinding, traction, slitting and rewinding should be well controlled so that the film substrate is always in a stable tension state to avoid deformation and displacement during speed up or down.
The film winding methods are mainly surface winding, center winding and center-surface winding. The tension of the surface winding method comes from the unwinding tension, and the contact pressure depends on the weight of the roll and the air pressure of the winding shaft. It can wind up larger diameter rolls but is not suitable for easily stretched materials such as PE. The central winding provides tension on the film roll through the winding shaft. By changing the torque, the tension curve can be effectively controlled without generating contact pressure. The tension of the central surface winding comes from the force between the center of the reel and the surface roller. A smaller roll arm can be used to slit film rolls with a larger width and diameter. However, it is difficult to precisely control the contact pressure and is not suitable for slitting harder films. Material such as PVC.