Created on 04.13

Why Multi-Roll Rewinding Needs a Differential Slip Shaft

Multi-roll rewinding is common in slitting operations. However, roll diameter differences cause tension variation, leading to poor rewind quality without compensation.

1. Problems in Multi-Roll Rewinding

Common issues:

different roll diameters
uneven tension
loose rolls
wrinkles

2. Limitations of Air Shafts

Air shafts rotate all cores at the same speed. Diameter differences create tension variation.

Results:

small rolls too tight
large rolls too loose
inconsistent quality

3. How Slip Shafts Work

Slip shafts use friction rings allowing independent slipping.

Benefits:

independent tension
automatic compensation
uniform rewinding

4. Improvements

Using slip shafts:

improves roll quality
reduces waste
increases efficiency

Ideal for:

film slitting
label materials
flexible packaging

Differential slip shafts:

compensate tension differences
improve rewind quality
reduce waste
increase stability

They are essential for high precision multi-roll rewinding.