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Static Beat | Control Static at the Corona Treater

(Static-Beat)

March 12, 2012, ... a backside discharge occurs at the exit nip where the web peels from the treater roller. Backside discharge is the secondary source of charging. This backside discharge deposits oppositely charged static ...

Winding Film: How COF Properties Affect TNT

(Winding Unwinding Rewinding)

October 17, 2011, Your ability to apply tension/nip/torque winding principles to produce the desired roll hardness is affected by the film’s layer-to-layer coefficient of friction properties Your ability to apply tension/nip/torque ...

Web Handling: Top 7 Causes of Wrinkles

(Web Handling)

October 09, 2011, ... wrap (usually stated in terms such as 10 o’clock to 3 o’clock), web tension (PLI), any nip load (PLI), web width, and maximum expected line speed. A good supplier will walk you through these questions ...

Unwinding Static

(Static-Beat)

August 21, 2011, ... The outside film surface is nearly neutral, so static will reside on the inside film surface. As the charged film approaches the first conveyance roller, a static discharge called pre-nip ionization will ...

Winder Targets Mid-Range Markets

(Winding Unwinding Rewinding)

May 31, 2011, ... system, and programmable tension and nip control for winding rolls directly off the process line. The slitter mandrel, spreader roll, core accelerator, drum, primary arm indexing, and transfer knife positions ...

ICE-ing | The Best Part

(Trends/Management)

January 31, 2011, ... for Static Control.” Other contributions include thin film waste reduction, drive systems, nip mechanics, tension control, and splicing accuracy. A third track on package printing and converting will ...

Green Converting: Recycled Roll Coverings

(Web Handling)

November 30, 2010, ... large winding or nip rolls require 700 lb of rubber. That covering is then discarded in a landfill. Now as much as 100% of that material can be saved by removing it carefully, testing it for foreign contaminants ...

Reflections on Deflection

(Winding Unwinding Rewinding)

November 30, 2010, ... nip rollers or support arms can alleviate the woes of deflection. A shaft will have less deflection when winding a full width product. In these cases, the shaft often will be reinforced by the pressure ...

Coating/Laminating: Signed, Sealed, Delivered

(Coating/Laminating)

September 30, 2010, ... acquired Unipac, another sealing company, with facilities in Canada and the UK. Selig's international growth was significantly enhanced by this acquisition. This, along with organic growth, led to the need ...

Brake Has Many Benefits

(New Products)

April 30, 2010, ... are said to include optimal air cooling, tool-free pad changes, high thermal capacity, the elimination of nip points because of the brake's compact size, a wide torque range, and long friction pad life. ...

AIMCAL & CEMA To Host AWEB Applied Web Handling Conference

(News | New Products)

April 13, 2010, ... Dr. David Roisum • Controlling Static in Winding Rolls, Dr. Kelly Robinson • Measurement & Modeling of Nip Roller Feed Rates: Dr. Kevin Cole • Curl in the Lab & on the Machine: Dilwyn Jones • Strain ...

Rollers for Quality Finish

(New Products)

January 31, 2010, Calender rollers ensure a quality web finish with precision nip pressures applied to a variety of substrates. Rolls are used to produce unique finishes Calender rollers ensure a quality web finish with ...

Get a Grip on Your Web

(Tension)

October 31, 2009, ... in nip rollers or “S” wraps. Vacuum rollers are designed to pull the web into intimate contact with the roll, preventing web slippage in either direction. The result is a highly effective web control ...

Winding Doesn't Add U

(Archive)

July 31, 2009, ... the yield point). If you double the air pressure on a nipped roller, you will double the air cylinder's contribution to the nip load (don't forget gravity and tension). In winding, few things are linear. ...

Playing the Wrinkle Blame Game

(Web Lines)

June 30, 2009, ... changes over time, relaxing or shrinking, then buckles may form in the roll. If the process conditions form a wrinkle during roll starts, if the winding nip loses contact, if the tension is upset, if taper ...

How To Prevent Winding Roll Sparks

(Static-Beat)

June 30, 2009, ... on winding rolls shown in Figure 1 is tinsel that has been installed on the wrong side of the film. In this example, the film touches the silicone rubber nip roller so the bottom surface of the film has ...

Film Charge Causes Winding Static

(Static-Beat)

May 31, 2009, ... core on the winder. Tension is maintained by the silicone rubber nip roller. While running, the roller deposits positive static charge on the lower surface of the film. As the roll winds, the voltage increases ...

WHAT'S NEW PRODUCTS: June 200

(New Products)

May 31, 2009, ... light curtains prior to the nip, as well as emergency stop switches at all four corners of the machine. Machine features speeds of 0-80 fpm, pneumatic tension control, and 8.0-in. nip rolls covered with ...

Stress & Strain

(Archive)

May 31, 2009, ... slitting; gather and buckle ahead of the nip point of a crush knife; and flutter out of plane, contacting shear knives ahead of the overlap point. In all these scenarios, a perfect knife setup can be ruined ...

The Coefficient of Winding Trouble

(Web Lines)

April 30, 2009, ... a product with a COF of 0.1 relative to 0.3 will require three times the nip load to create the same roll tightness. But since low COF rolls need more, they usually need to be wound at higher tension and ...