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Winding Unwinding Rewinding

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 9, 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 1, 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 1, 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 1, 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 1, 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 1, 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 1, 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 1, 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 1, 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 1, 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 1, 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 1, 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 1, 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 1, 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 1, 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 1, 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 1, 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 1, 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 1, 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 1, 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 1, 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.

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