Simplifying slitter concepts

Slitter terminology can be bewildering; part of the problem being that there's no industry standards for the terms used when describing various parts of the slitter and winding process. I've talked about this before so won't focus on it now, instead I'll ask you to point your clicks at this Slitter Glossary, instead I'm going to look at how we describe some of the more complex issues surrounding slitting and rewinding.

Some of terms used when describing slitter processes are conceptual, by which I mean they might describe the part of a process that isn't easily described with the written word. I had my suspicions and they were confirmed when we started work on the aforementioned Slitter Glossary. Because a lot of slitter terminology related to the movement of materials and their reactions to external pressures we have started using graphic overlays to denote movement, see below for a couple of examples.

So if you're looking for a slitter or salvage winder and want to be sure that your needs are fully understood come and speak to the experts https://www.universalconvertingequipment.com/

Driven unwind
A driven unwind describes a system whereby the shaft (or shaftless system) of a Slitter Rewinder that houses the master / jumbo roll is driven by a motor. A driven unwind is often used when a material is tension sensitive, when an unwinding roll is driven it minimises inertia of the parent.

Reversible running

Reversible running salvage slitterReversible running enables salvage / doctor rewinders to run in two directions, allowing print direction to be corrected without the need to unload and re-load the roll.

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Trim removal on slitters

A trim fan attached to a slitter. As discussed previously on this blog the process of slitting (at its most basic) can be reduced to the one-line description of ' a big roll is loaded on one side of the slitter rewinder, and smaller rolls are loaded off the other side' and that's fine... most of the time. Here comes the example! If a 1000mm wide roll is loaded onto a rewinder and is slit down into rolls that are 212mm wide then four rolls would be produced. If your mental maths is up to scratch you might have noticed that 4x212 does not equal 1000, and that means that from the original / master / jumbo roll there will be roughly 117mm left over. Sometimes this happens because the edges of jumbo rolls are discarded due to damage, print reasons or simply because the material being slit isn't coated all the way to the edges of the roll. So what happens to this waste material? Waste material can be wound onto cores in the same way 'correct' rolls are, ...

We need to talk about how you're handling this...

At the risk of sounding like I'm marketing for them instead of Universal I'd like to mention Package Print Worldwide ( @PackPrintWorld ) again. We contributed to the safe materials handling article in the new issue of Package Print Worldwide, with particular focus given to our roll handling trolley . We have recently expanded the range of material handling attachments for the trolley and have seen the number of enquiries rise considerably. Sadly safety is a subject that is sometimes (thankfully only rarely) overlooked by some companies, and when it comes to safe roll handling the risk of personal injury is one that is easy to minimise with the correct equipment. We have priced our materials handling equipment at a level that should be easily affordable to all, so there's no excuse for lax safety! More roll handling information: Find out more about our roll handling trolley... Reducing roll handling risk and increasingly productivity...

Core Cutter demo video

Core Cutters have been at the forefront of my mind over the last few days, mostly because we have been working with our video team on a new demonstration video for our Automatic Core Cutter . You can view our rather smart new video below, and you can find out more about Automatic Core Cutters (and of course buy one) by contact me directly or by visiting https://www.universalconvertingequipment.com/core-cutters/automatic-core-cutter P.S I'm taking bookings for Core Cutter demos down here in Ipswich at the moment, so get in touch if you want to come and have a go on one of our demonstration machines!

Slitter Man

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