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Web Lines: Wrinkling of Foils

(Flexpack)

July 31, 2011, ... buckle, so they need high web-roller friction (from friction, tension, and width) to apply the load needed to make a wrinkle. The stiffness of foils means that misalignment effects quickly create large ...

Web Lines: Is Wound Roll Pressure Greater Than Tire Pressure?

(Tension)

June 30, 2011, ... roll pressures. A frictional sandwich is an easy and inexpensive way to measure roll pressure. Make a frictional sandwich by inserting an unlubricated strip of steel feeler gauge (0.002 in.) in a folded ...

Flexible Slitter Has Short Web Path

(Slit)

May 31, 2011, ... to entering slitting section; cantilevered air differential shafts with choice of direct friction or internal slip designs; and razor or shear slitting. Parkinson Technologies | 401-762-2100 | www.parkinsontechnologies.com ...

Do You Want Nips with That? Part 2

(Winding Unwinding Rewinding)

April 30, 2011, ... be opened once steady line speed is reached. Q Why are nip rollers a popular choice to create drive roller friction? A Mainly, nips are simple to understand — pinch it, pull it. We can relate to nipped ...

Web Lines: Would You Like Nips with That?

(Winding Unwinding Rewinding)

March 31, 2011, ... isn't there doesn't create waste. You may not be able to get rid of your need for nip pressure in your value-adding processes, but the nips I'd like to see avoided are the ones used to create friction ...

Entry Level Slitter Option

(Slit)

February 28, 2011, ... is designed for low-volume production. At a maximum speed of 450 mpm, machine winds finished rolls up to 610 mm and 1,750 mm working width, also with friction winding. Slitting section can be equipped ...

Static Beat: Charge Control Antistatic Layers

(Static Elimination)

January 31, 2011, ... increase in surface roughness improves both static performance and wound roll integrity by increasing the coefficient of friction. In addition to improving static performance, the backside layer also may ...

Web Cleaning: To Contact or Not?

(Web Cleaning)

January 31, 2011, ... layer of air near the surface). Contact Systems Contact web cleaners fall under the following broad headings: Vacuum Systems | Typically the web is in contact with a low friction part of the web ...

Web Lines: Blow Away Your Roller

(Web Handling)

December 31, 2010, ... or air turns with a smaller radius. In designing air turns, there are two approaches: Partial lubrication for reduced friction contact Full lubrication to a target non-contacting float height  ...

Montalvo Website Features Tension Upgrade

(Tension)

October 12, 2010, ... dual disc brakes in situations where significant unwind friction and torque are occurring in the original brake installation. According to Montalvo, the benefits to Mark Andy press users include being ...

Web Lines: Web Length per Roller Revolution=?

(Editorial)

September 30, 2010, ... web elongation? Since most webs will have a higher coefficient of friction to rubber than hard metals, it is likely the rubber roller will determine how much web is fed forward. The first estimate of ...

Plastics Recycling: Reclaim & Reuse

(Coating/Laminating)

August 31, 2010, ... we require.” In the basic EREMA system, scrap material is fed into a vertical densifying unit that uses friction to compress and preheat the plastic. The preheated, densified material is then fed directly ...

Test COF of Board

(Controls)

July 31, 2010, The Inclined Plane Tester (IP2) is a stand-alone instrument for determining the static friction coefficient of flat surfaces. Designed for use in the The Inclined Plane Tester (IP2) is a stand-alone instrument ...

Web Lines: Do You Need an Auto Web Guide?

(Web Guiding)

May 31, 2010, ... (See last month's column on the force to bend a web.) Besides not having the frictional force to move your web, guiding may damage, wrinkle, yield, or break it. Though this may mean no web guide for ...

Blade Coatings: Prolong Blade Life

(Slit)

May 31, 2010, ... both harder and smoother, friction effectively is reduced; performance and life are improved significantly. Coated slitting blades increase production by reducing machine downtime due to buildup on ...

Montalvo Website Displays Martin System Upgrade

(News | New Products)

May 11, 2010, ... air cooling, a “no-tools” brake pad maintenance system, a high thermal capacity, a wide torque range, and more longer friction pad life. For more information contact The Montalvo Corporation at 800-226-8710 ...

Force Is Needed to Shift a Web

(Web Guiding)

April 30, 2010, ... Use a 90-deg wrapped roller with a friction coefficient of 0.25. If you try to bend this web just 40 mils (1 mm) in a 20-in. (0.5-m) span, no problem. But try to bend this same web ⅛ in. (3 mm), and ...

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. ...

Gusset Boards Are Light

(New Products)

March 31, 2010, Gusset boards are said to reduce friction, eliminate heat buildup, and weigh almost half as much as traditional wooden gussets. Newer designs allow for Gusset boards are said to reduce friction, eliminate ...

Riding the Rails

(Web Handling)

March 31, 2010, ... allowing rolls to move against the metal banding used to secure them. The large rolls, which measure 52-60 in. long, sometimes sustained heavy damage from friction with the metal banding. The rocking ...