Slitter words mean what now?

Slitting / cutting machines are complex beasts, and so I guess it is perfectly natural that a complex vocabulary is spawned by discussing the methods and mechanics of slitting. The corporate culture within companies that use converting machinery usually ensures that slitter operators and their management all speak the same language, but when a need arises for slitter users to speak to outside agencies (when buying or servicing machinery) then it can become a bit of a challenge making oneself understood.

Introducing the Slitter Glossary.

When new customers contact me about buying a new slitter (or upgrading / servicing an third-party machine) it is important to make sure I fully understand our customers' needs. I concentrate a large portion of my energies making the specification part of the buying process incredibly simple for our customers, and recently a part of that process has involved creating a glossary of slitter terms.

The slitter glossary is a bit like a garden or model railway, in that it will never be finished. The glossary is being added to all the time, and hopefully as I continue to add new photographs and definitions this glossary will develop into a very useful resource, not just for our customers, but for everyone who works with slitter rewinders and converting machinery.

View the slitter glossary...

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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...

Winding onto 6" cores on a slitter with 3" shafts

A (used) 6" differential ball chuck designed to fit a 60mm rewind shaft (once the 3" chucks have been removed!) I sometimes use this personal blog of mine to talk about the basics of slitting and rewinding, with the content partly led by thinking back to the questions I had when I first started working in the converting machinery industry. One of the first questions I had was 'how on earth can slitter rewinders with 3" rewind shafts be used for winding onto 6" cores?' A lot of converters and labellers / packaging companies regularly switch between winding onto 3" (76mm) and 6" (152mm) cores, which is one of the reasons we designed our Automatic Core Cutter to change between core sizes in under thirty seconds. But what do companies who predominantly wind onto 3" cores do when they need to wind onto 6" cores? The answer is actually quite simple - they remove the 3" ball chucks and slide on 6" core chucks! There are of...

Slitter Man

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