By Dave Rumson, slitting educator and consultant Editor’s Note: This digital edition now contains a correction on page 76 from the author. We apologize to our readers. Introduction Why do we trim slit webs? To paraphrase the late Professor Erwin Cory, “That is a two-part question. Why? is a question that has plagued mankind since time immemorial.” Secondly, do we trim … [Read more...] about The basics of web trim slitting
Slitting & Rewinding
Material determines appropriate slitting machine concept
By Martin v. Pawelsz, Head of Sales, Rigids & Tech App, Kampf GmbH The challenge in producing perfect rolls lies in the non-uniformity of material formation processes, coatings and printed surfaces. The following article looks at the intricacies of the winding process, the importance of roll hardness and the ultimate goal of producing high-quality label stock material … [Read more...] about Material determines appropriate slitting machine concept
The good, the bad and the ugly of static electricity when slitting and rewinding
By Dave Rumson, slitting educator and consultant Production process personnel new to the converting industry may be shocked to find out that the slitting and roll-making processes can be hair-raising experiences, both production quality-wise and physically dangerous. The reality of web slitting and roll winding is the potential for static electricity to occur that can cause … [Read more...] about The good, the bad and the ugly of static electricity when slitting and rewinding
Cable Tapes Africa to install second Nicely slitter/rewinder for electrical-insulation materials
Johannesburg, South Africa-based Cable Tapes Africa has once again chosen Nicely Machinery, acquiring its second slitter/rewinder, a Model EG-300DL duplex shaft center-surface system, for its electrical-insulation materials converting. The shipped EG-300DL features a roller width of 1,300 mm, with a minimum slit width of 15 mm and a maximum rewind OD of up to 800 mm, … [Read more...] about Cable Tapes Africa to install second Nicely slitter/rewinder for electrical-insulation materials
How to achieve tight toleranceswith the wrap shear-slitting process
By John Marold, applications engineer & slitting specialist, Parkinson Technologies, Inc. Introduction In the world of slitter/rewinders, achieving a tight slit-width tolerance is essential to the operating process for many applications. To ensure such a tight tolerance is achievable, proper alignment and minimal movement leading up to the slitting of the final … [Read more...] about How to achieve tight toleranceswith the wrap shear-slitting process