Web/Roll Handling

Montalvo Video Demonstrates Load Cell

Published: January 03, 2014

Demonstrating the ES load cell, video discusses the two major factors in selecting load cells: sensitivity and repeatability

Web Lines | How the Open Loop Torque Control Sets Winding Tension

Published: December 10, 2013

There are many winding machines that do not use closed-loop tension control in the winding process. Here is how they work.

What Mechanisms Cause a Web to Shift Laterally?

Published: October 08, 2013

Web Handling expert Tim Walker identifies the five culprits that cause a web to move off centerline.

Web Lines | Curl Mechanics Pt. 2—Transverse Direction Curl

Published: August 27, 2013

In Part 2 of this four-part series on curl, web handling expert Tim Walker tackles three common sources of TD curl.

Eliminating Boundary Layer Air During Winding

Published: July 16, 2013

Eliminate boundary layer air while winding rolls of film, in most cases, by using a lay-on roller. For coating and extrusion technology, vacuum boxes or electrostatic pinning can sometimes–though infrequently–be effective.

Web Lines | Curl Mechanics Pt. 1—Machine Direction Curl

Published: July 09, 2013

In this first part of a four part series on curl, web handling expert Tim Walker discusses curl in coated and laminated products

Web Lines | Winding Process Fundamentals, Pt. 3

Published: May 09, 2013

In Part 3 of this four-part series, web handling expert Tim Walker answers the question: How do dimensional changes within a roll (e.g., compression) change roll strains and stresses?

Basics: What Are the Key Process Variables of Winding?

Published: May 03, 2013

Basic definitions of tension, nip, and torque help describe what variables are important when winding a roll.

What impact can temperature change have on a roll?

Published: February 28, 2013

The best rule of thumb is to avoid heating or cooling winding or wound rolls. Keep a roll's temperature stable.

Web Lines | Winding Process Fundamentals, Pt. 2

Published: February 19, 2013

In Part 2 of this four-part series, web handling expert Tim Walker tackles tension control from the first to the final lap of the winding roll

Eliminating Tin-Canning Rings on Your Wound Rolls

Published: January 25, 2013

The elimination of roll rings that simulate rings on a tin soup can is a perennial problem for web handling experts. This list of possible solutions might work for you.

Web Lines | Winding Process Fundamentals, Pt. 1

Published: January 14, 2013

Understanding winding, roll defects, and winding-related web quality begins with understanding how the web, winder design, and process conditions combine to create the stress and strains of the wound roll.