E-Newsletter

Digital Magazine

Contract Services

Industry Links

Winding Unwinding Rewinding

Driving R&D

Published: June 30, 2007, By Edited by Deborah Donberg, Associate Managing Editor
Improvements in web processing are driven by the need to reduce manufacturing costs and boost product quality. Playing a key role in many of these improvements are advances in web handling technology, many of which are the result of work carried out by the Web Handling Research Center (WHRC) at Oklahoma State Univ.

Going Thin

Published: June 30, 2007, By By Keith Fordham Ashe Converting Equipment

Thinner gauge materials impact both on operating costs and the environment. The difficulty with going thin is that problems such as wrinkling, air entrapment, and tension control, and various other problems typically associated with material profile perturbations, such as gauge band variations, can become magnified when processed on some types of slitter/rewinders and other converting machinery.

Shocks Can Be Deadly

Published: February 01, 2007, By By David J. Bentley Jr. Contributing Editor
An earlier column in this space on static elimination resulted in a response from a reader that is very illuminating. Following are summaries of the five main points from that response. This information shared by a reader should scare you.

How to Drive a Winding Roll

Published: December 01, 2006, By Timothy J. Walker, TJWalker & Assoc. Inc.
What is the best way to drive a winding roll? You have three choices: from the surface, from the center, or both.

Difficult Winding: Part II

Published: September 01, 2006, By By Timothy J. Walker TJWalker & Assoc. Inc.
Last month I introduced you to roll modulus ratio, the first of the terrible trifecta of difficult winding. This month let's move on to the next two of

What Makes Winding Difficult?

Published: August 01, 2006, By By Timothy J. Walker TJWalker & Assoc. Inc.

What is it that allows one product to run all year with 2% waste and another can't get on the core without problems? Consider this a lesson in product

The Pressure of Winding Rolls

Published: April 27, 2006, By Timothy J. Walker, TJWalker & Assoc. Inc.
Too much pressure inside a roll means more wound roll problems. Too little pressure inside a roll has its own negative effects. Worse still is having both high and low internal pressure occuring at the same time.

The Converting Relay Race: Part II

Published: August 31, 2005, By Timothy J. Walker TJWalker & Assoc. Inc.
Our rolls are loaded, spliced, and ready to run. To complete the unwinding relay, we need to finish strong with our plan for web alignment and tension control.

The Converting Relay Race: Part 1

Published: July 31, 2005, By Timothy J. Walker TJWalker & Assoc. Inc.
Converting productivity is a race to see how much material we can get through our process. Instead of a marathon, with one runner going the distance, converting processes are more like relay races, with a series of runners. Like a relay, we need to pass baton from roll to roll so each roll can run their leg of the race.

The Word on Winding

Published: July 31, 2004, By Carrie Cleaveland, Editorial Intern
Winders may not cost six million dollars, but like that 1970s television phenomenon, The Six Million Dollar Man, we have the technology to build them better, stronger, and faster.

Winding Better Rolls

Published: June 01, 2003, By Timothy J. Walker, TJWalker & Assoc. Inc.

It's not obvious how winding adds value to your product (it does), but it is obvious when it's done poorly.

Differential Rewinding: Part Three

Published: January 01, 2003, By Timothy J. Walker, TJWalker & Assoc. Inc.
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

Published: December 01, 2002, By Timothy J. Walker, TJWalker & Assoc. Inc.

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

Published: November 01, 2002, By Timothy J. Walker, TJWalker & Assoc. Inc.
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.

Strand Tracking Problems on Your Slitter/Rewinder

Published: May 01, 2002, By Timothy J. Walker, TJWalker & Assoc. Inc
A slitter/rewinder has two goals: Divide the web into strands (slitting); and create uniform individual rolls (winding). This plan has three potential

The Unwinding Story

Published: April 01, 2002, By Nsenga Byrd Thompson, Staff Editor
Sometimes purchasing a thing, like a pair of bluejeans, can be overwhelming. Unwinders are such a standard piece of equipment in a converting plant that

Pyramids and Wound Rolls: Long-Lasting Quality

Published: March 01, 2002, By Timothy J. Walker, TJWalker & Assoc., Inc.
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

Published: February 01, 2002, By Timothy J. Walker, TJ Walker & Assoc. Inc.
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

Shaft Collar Decisions Can Be Momentous

Published: February 01, 2002, By Mark Wilson, Amacoil Inc.
Braking moments of force affect efficiency in converting operations. Which is why... Shaft Collar Decisions Can Be Momentous

Workhorse Winders Do More Than Ever Before

Published: December 01, 2001, By Claudia Hine, Senior Editor
Winding technology has gone way beyond what it was in the '90s, says Bruce Butler, VP of sales at Independent Machine Co., Fairfield, NJ. The entire system

Canadian-Based KT Holdings Licenses Spooling Technology to Tricon

Published: October 01, 2001, By PFFC Staff
WINNIPEG, MB, CANADA--Tricon Conversion LLC, Gainesville, GA, USA, recently has been granted license to produce and sell Step-Pac film spools, says Step-Pac

K Show Coming Attractions: Goebel Slitter/Rewinder and EREMA Booth Highlights

Published: September 21, 2001, By PRESS RELEASE
The K Show is slated for October 25 to November 1, 2001, in Düsseldorf, Germany.

Slitter Savvy: The Art of Winding Good Rolls

Published: August 01, 2001, By Duane Smith, Black Clawson Converting Machinery

While you can't make paper or other products on the slitter/winder, it is every winder operator's job to ensure that web defects are not amplified during the slitting/rewinding operation.

Contract Converter Finds Midwestern Niche

Published: December 01, 2000, By Teresa Koltzenburg, Senior Editor
Midwest Converting saw a need in its geographic area for an operation that concentrates on contract converting solely. Helping the company fill that need successfully are two high-speed drum slitters from Ausquip.

Converted Solutions Slitter/Rewinder Boosts Productivity on Laminating Line

Published: April 01, 2000, By Claudia Hine, Senior Editor

As Web Dynamics moves forward with a grant to expand its range of lamination processes, a new Consol slitter/rewinder provides the flexibility to expand its range of materials.

Finding a simple solution to a shocking problem

Published: April 01, 1998, By Mykytiuk, Andrew
Static electricity was causing big problems for Favorite Plastics. The solution - a Tantec system - was only a phone call away.Favorite Plastics, a Brooklyn,

Trim system in India to be first to handle sugarcane paper.

Published: April 01, 1996, By Wolpert, Vladimir
Voith Sulzer Papiertechnik GmbH commissioned M&Y to design and supply a trim system for a winder at its Tamil Nadu plant in India to handle newsprint

Don't forget your unwind!

Published: February 01, 1996, By Boyle, Edward
Neglecting to give the appropriate consideration to the unwind and unwind roll handling can be a critical mistake.The unwind stand can be one of the most

Winders/Unwinders: Gettting Better Every Day

Published: September 01, 1995, By Andrew R. Mykytiuk, PFFC Editor
Unwinders/winders/rewinds, like most things in life, are not quite as simple as they appear to be. In fact, according to Dr. David Roisum, author of The Mechanics of Winding, winders have a critical influence on the creation of all kinds of roll defects, defects that can easily result in a roll being devalued, culled or scrapped.

Resources

Subscribe to PFFC's EClips Newsletter