Industry Q&A: Slitting/Rewinding
Bettering the Slitting/Rewinding Process
FP had the opportunity to get answers from Parkinson Technologies’ Dusenbury Product Specialist John Marold.
Q: What generic troubleshooting tips can you offer to our readers for slitting/rewinding?
A: Alignment is critical to ensure a good wound roll. In addition, tension needs to be verified and calibrated. Verification is accomplished using a pull scale attached to the core, calibration is done on the transducer itself using the manufactures specifications.
Q: Are there any new equipment add-ons or tweaks that can be made to existing or older model equipment to better the process?
A: There are actually a few add-ons that can be made on an existing machine. These include air differential shafts, which allow for better tension control, laser core and knife positioning systems and powered roll off load systems. A laser core and knife positioning system is a great add-on for precision alignment of the rewind cores and reduces the time required for width changeover.
Q: What’s the one key thing to consider and closely monitor during this whole process?
A: Monitoring tension control is important and should be controlled throughout the whole process, but one area where many problems often occur is on the unwind. If there is too much tension, this often will cause web breaks or telescoping and if the tension is too loose, then the web will not slit properly and causes formation problems on the rewind. A powered roll off-load system reduces fatigue on the operator and increases safety by minimize the risks of strain or repetitive injuries.
Q: At what capacity is an operator ideally running the machine?
A: Capacity is determined by production needs and can be improved by scheduling less changeovers to increase run time.
Dusenbery Converting Systems | Parkinson Technologies, Inc.
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