There are several things that might be causing wrinkles:
- Check the roll stand brake pressure to be sure the web is taut across the width of the sheeter. Be careful because if too much tension is applied, you will get short sheets.
- Measure the slitter penetration. You need to have the top blade overlap the lower blade just enough to get a clean cut. This is usually about 0.015”- 0.030” (0.38 mm – 0.76mm).
- Make sure the lower slitter ring is set so the top blade contacts the material after it is wrapping the lower ring. This is usually done by adjusting the lead in roll.
Review the cant angle on the top slitter. If there is too much cant, (too much of an angle off the vertical) the middle slitter will be trying to push the material out of the way. Since it has no place to go it wrinkles. Lastly, check the squeeze roll and make sure the nip pressure is even and the web is being pulled straight.
