Web Lines

Cinching Belt Tightening Gone Bad: Part One

In today's economic climate, belt tightening sounds like a fiscally wise move. Belt tightening, also known as cinching, is good for budgets, trash bags,

Differential Rewinding: Part Three

This month we continue our diagnosis of differential rewinding. The last two columns reviewed the whys and hows of differential rewinding, but before filling your prescription for two new differential shafts, let's review potential detrimental side effects.

Differential Rewinding: Part Two

Last month we made the case for using differential rewinding shafts. This month, let's talk about what differentiates one differential shaft from another.

Differential Rewinding: Part One

Don't try to do ten things at once. While this is good advice, sometimes ten things come flying at you at once. If you focus on one item, you risk dropping the other nine.

Five Questions and Answers on Lubrication

Lubrication occurs when a gas or liquid separates or reduces the contact between two surfaces. Lubrication is used intentionally to reduce wear and increase

Well Done Tension

I'm in love with a new gadget that makes cooking easier. It's the electronic temperature probe. These have been available for manufacturing applications

Goldilocks and the Three Bears Deal with Traction Problems

Rollers are the hands of web handling the hands we use to grip the web to meet our goals for web speed, position, and flatness. To be able to position

Outsourcing Is Trendy, But Is It Right for Process Expertise?

Outsourcing and supplier management have been hot topics over the last decade. Using external resources can provide budget flexibility for economic ups

Stripe Slitting: The Challenge of Staying within the Lines

Lines make life more difficult. Remember coloring as a child. At first it was just you, your crayons, white paper, and free expression. Life was easy.

Strand Tracking Problems on Your Slitter/Rewinder

A slitter/rewinder has two goals: Divide the web into strands (slitting); and create uniform individual rolls (winding). This plan has three potential

Mapping Your Way to Better Tension Control

Web handling defects often can be traced back to a specific location in your web line. Web tension at that location is always a prime factor in understanding

Pyramids and Wound Rolls: Long-Lasting Quality

What comes to mind when you think about the pyramids? First, the pyramids have survived the test of time. Second, they have a distinct and impressive

Web Line Knowledge Offers a Competitive Advantage

Web lines are the backbone of the converting industry the equipment used in converting paper, film, foil, and other webs into valued product. In this

Wide Web Handling and the Problems It Can Bring

As new film casting machines have grown in width during the past several years, so have casting machine windups. One problem that arises with wider rolls

MD Wrinkle Formation Causes and Cures

MD (machine-direction) wrinkle problems (sometimes called tin canning) still plague many converters and/or film suppliers. The two main contributing parameters

Slitting Adhesive-Coated, Low-Strength Films

Low-strength films, such PE or cast PP, sometimes are coated with an adhesive and slit into customer-sized rolls. Low-strength films do not have sharply

Belt Tracking Problems Require Careful Attention

Many wide-belt processes, whether they are made of metal, fabric, or plastic, may experience tracking problems. Some will have tracking problems even

Web Scratch Solution: Regulate Your Running Rolls

Driven rolls also may scratch the web surface, even though they are very accurately speed-controlled.

Over-Tensioned Webs and What to Do about Them

Webs are often tensioned beyond their elastic limit in specialty-type processes such as metallizing. Usually, the high tension is in a zone where web

WEB SOLUTIONS

The key to a successful and low-cost upgrade is to have a competent engineering analysis done of all the critical machine interactions…

A Proposal for Spreading Base Web During Melt Extrusion

Melt extruded resin polymers on cloth and other webs sometimes result in transverse direction (TD) curl of the laminate. And this curl often causes poor roll formation when the base roll is slit into large-diameter, narrow-width slit rolls.

A Glossary of Descriptive TermsSixth Installment

Shaftless unwind/rewind stands: Basic pieces of equipment used in holding the supply roll(s) and production roll(s) on the converting machine. These stands

A Glossary of Descriptive Terms - Fifth Installment

Here is the fifth in this series of glossary columns, intended to improve the technical communication between new and seasoned members of the converting

A Glossary of Descriptive Terms, Fourth Installment

I have had very positive feedback from the glossary of descriptive terms that I began in the September 2000 issue (see October and December issues for

A Glossary of Descriptive TermsThird Installment

This column is a continuation of the glossary of terms that I began in the September 2000 issue for the purpose of improving communications in the converting

A Glossary of Descriptive TermsSecond Installment

Bill Hawkins continues his glossary of web handling terms for readers who are new to the industry and for those who are not new but have questions about different versions of these terms.

A Glossary of Terms to Help Avoid Failure to Communicate

There are many terms used to describe similar things in the converting industry. These vocabulary differences can present communication problems around

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