November 21, 2024

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Winding Unwinding Rewinding

Time for Unwinding Upgrade?

Published: September 01, 2009, By By Timothy J. Walker Contributing Editor

How do you know when its time to upgrade from a brake-controlled to a driven unwinding process?

Spool Rules

Published: September 01, 2009, By By Bruce L. Butler, Independent Machine Co.
No longer just limited to paper, film, and foil materials, converting is a critical process for nonwovens and the increasing complexity of laminates

Winding Doesn't Add Up

Published: August 01, 2009, By By Timothy J. Walker Contributing Editor

When things in life are linear, they make sense. Driving two hours usually gets you twice as far as driving one hour. Adding two doughnuts a day to your

The Coefficient of Winding Trouble

Published: May 01, 2009, By By Timothy J. Walker Contributing Editor
In winding, the important coefficient of friction (COF) is always about the two surfaces that will come in contact as the entering layer hits the winding

Custom Core Shafts Do the Job

Published: August 01, 2008

NEW BERLIN, WI Premier Paper Converting Machinery, a company making machines that produce fiber and corrugated partitions, now offers a custom machine

Winding: What We Know & What We Don't Know

Published: August 01, 2008, By By Timothy J. Walker Contributing Editor
Winding is an amazingly complex process. Our understanding of winding can be broken into three areas: the winding process, winder design, and wound roll

It's 40 Years for IMC

Published: April 01, 2008
FAIRFIELD, NJ Why does one company survive and thrive for 40 years while many others seem to come and go? PFFC put that question to Bruce Butler, VP of

Web Lines: Thinking About New Equipment?

Published: February 01, 2008, By By Timothy J. Walker Contributing Editor
A new year often brings new budgets and thoughts about new equipment. If you are lucky enough to be handed a project to buy new converting equipment,

Roll Winding Dynamics

Published: February 01, 2008, By By Keith Fordham, Ashe Converting Equipment

Materials today often are more than they may seem at first glance; many are manufactured with non-conventional properties. Label and semi-glossed enamel stocks are engineered

Picking Up the Pace

Published: January 01, 2008, By By Edward Boyle, Contributing Editor
As press manufacturers continue to introduce presses that can run faster in theory but not necessarily in practice it falls to the manufacturers of register

Ecological Rewinder

Published: December 21, 2007
| Titan has introduced the twin-shaft Titan ER610 cantilever slitter/rewinder to complement its Titan SR8 model. THE ER610 ecological rewinder is the result of market research, design, and development work by Atlas Converting Equipment and Bobst.

Differential Rewind Shafts

Published: December 09, 2007
Goldenrod Corp. has released the 1250-DFX model differental shaft, which winds multiple webs of varying guage thicknesses by imparting just the right amount of resistance to the core ID.

Differential Winding Limits: Part II

Published: December 01, 2007, By By Timothy J. Walker Contributing Editor
Differential shafts are great tools, but like any tool, they have their limitations. Last month I covered the complexity of a differential shaft's actual

Differential Winding Limits: Part I

Published: November 01, 2007, By By Timothy J. Walker Contributing Editor
The purpose of differential winding is to apply a desired torque to two or more rolls winding on a single shaft. Differential winding allows multiple rolls to turn at differing speeds, with each roll free to slip at the speed required to compensate for roll-to-roll diameter variations and strand-to-strand length variations.

Slitting & Rewinding Fundamentals for Converters

Published: October 12, 2007, By pffc-online.com
The CEMA Slitting & Rewinding Fundamentals for Converters Seminar will be held November 13 and 14, 2007, in Minneapolis, MN, and will take you step by step through the best practices techniques in such areas as winding, slitting, cores and cutting, retrofitting, chucks, shafts, spreading, and guiding.

Baggy Webs: Part III-Causes

Published: July 01, 2007, By By Timothy J. Walker, TJWalker & Assoc. Inc.
We know baggy webs are a problem and we know we can measure them. What do we do next? First, we need to find a way to fix it in the short term. Second, we can work on a long-term plan to prevent baggy webs from happening.

Cut to the Quick

Published: July 01, 2007, By Edited by Claudia Hine, Managing Editor
A turnkey converting system allows Elliott Absorbent Products to offer faster turnaround times and new custom services.

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.

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