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Eight factors that affect the quality of slitting protective film Jun 01, 2018

1. The relaxation of the film film

The width of each film film is not the same in the transverse direction. If the width changes more than the film width, strain on the tension causes many slit films to relax immediately and lack of stiffness and traction because of the small tension. At this time, the entire film web will shift.

2. The gravity of the film reel

Because of the joint effect of viscose and static electricity, it is necessary to use force to peel the film from the release roll. If the adhesion and electrostatic effects are too strong or change, it will directly lead to winding and tracking problems.

3. Displacement caused by roll skew

Even if the film length is less than the tension, it may cause tracking problems. In general, reels tend to tend to tension tight films. Film skew and traction changes will cause the film roll to shift.

4. Relaxation caused by rewinder accumulation

The latch winding is very sensitive to changes in the diameter of the reel. Because it is not a differential rewind, the reel can operate at different rotational speeds. The thinner the film, the smaller the diameter of the reel, and the less the accumulation of the reel film, resulting in a film film. Relaxation and displacement of the roll

5. Axial displacement of longitudinal cutter

Sometimes when the slitting film begins, the slitting is not neat enough, but this is not a tracking failure. The solution to this is to use a scale indicator to measure the lateral displacement of the longitudinal cutter during rotation and loading. It can be used to grasp the changes in the slit width, but all the cutters must run in unison to ensure that each slit roll is absolutely consistent.

6. Tracking changes in the diameter of reels and reels

The cylindricity of the downstream reel will cause the film to follow the large diameter side, while the reel will not have the cylindrical outline, but it will have the same effect. Pulling the film roll to the larger diameter side, stacks and gap reels can also avoid such problems.

7. Adjust the reel or rewind

The normal feeding rule defines that the film tracks into the downstream reel, which is perpendicular to the direction of the rotation axis. Similarly, if the correction is wrong, the off-center or the rewind will change again, and the film roll will be in the horizontal position. After mastering the operating principles of these processes, the above problems can be avoided, thereby reducing waste.

8. Vertical slitting challenge line - Shenzhen Rihai Technology Co., Ltd.

It is relatively easy to slit a homogeneous wide web into narrow rolls. However, if you want to cut the material into lines or stripes, the trimming scale is very strict and you will find it very difficult. However, there may be some skilled operators, some high-precision slitting experience, and the slit width tolerance can be controlled within ±0.003in.

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