Web Handling
Web Wise: Are you my customer? Paid Members Public
Many of us recall the P.D. Eastman children’s book, Are You My Mother? Like most children’s books, the lesson and answer are simple. In this case, the presumption is that you only have one Mom. Life is much more complicated in industry, specifically related to customers. You
Web-handling best practices for corona treating on R2R-converting lines: Why the web path matters Paid Members Public
Did you know that poor web handling creates trouble for corona surface-treatment operations? It often is the hidden root cause of suspected treatment issues and can lead to significant downtime. As converters run higher line speeds with thinner films, greater attention is required to guarantee proper web handling. In addition
WEB WISE: What’s behind the real problems caused by air entrainment? Paid Members Public
Air entrainment is real, and it can cause real problems, but only in certain circumstances. When and where and what are the salient questions. Let us begin with the “what” of the mechanics. As seen in Figure 1, air “sticks” to both the web and the roll(er). During run,
How Roller Shape Controls the Lateral Movement of Webs Paid Members Public
Presented by Jerry Brown, Essex Systems Last year, I talked about how shifting, or pivoting a roller produces lateral web motion. This time I will discuss how nonuniform rollers (tapered, concave and convex) produce lateral movement. Once again, we will see that it all comes down to the same thing
Practical Method to Design a Wrinkle Experiment Paid Members Public
Presented by Neal Michal, Converting Expert, LLC Wrinkles are the most common issue that web handlers face. The delivered quality of the web and the wound roll is contingent on the absence of wrinkles. It is common to find troughs and wrinkles in various places on a web process. Wrinkles
Things to Consider for a Successful Inline Slitting Process Paid Members Public
Presented by Joe Connelly, Parkinson Technologies Inc. On the surface, the thoughts of eliminating steps in a converting process to save time and gain efficiency are very appealing. Why wouldn't you want to get shippable products directly off the production line and avoid multiple steps? In many cases,
Web Material Properties: Easy Paths Through the Swamp (but beware of alligators!) Paid Members Public
Presented by Dilwyn Jones, Emral Ltd. The properties of webs are needed for diverse “web handling” activities such as machine specifications, design and upgrade, new and existing product development and manufacture, and troubleshooting breaks and defects – especially using formulae and models. Unfortunately, there is considerable variability hidden behind generic material
WEB WISE | What is the best roller wrap angle? Paid Members Public
This mundane question is, in some ways, more important than its more popular cousin, “What is the best roller-to-roller span?”[1] Yes, both affect the layout and cost of a machine. However, rules for wrap angles are more numerous, and much more consequential, if you get them wrong. Let us
