Carbon fibre idler rollers (composite rollers) are designed for reduced weight and high critical speed.
Lightweight, low-inertia idler rollers allow faster web speeds, reduce vibration, decrease waste, and improve product quality.
For over 30 years, the Double E Company has used carbon fibre as a shaft housing material for demanding applications in the paper, film, and foil converting industries. This high-tech material offers clear benefits over traditional steel or aluminum shafts, including light weight, higher critical speed, reduced vibration, less deflection, and faster line speeds.
Similar benefits are evident when carbon fibre rollers replace traditional steel or aluminum rollers. With carbon fibre rollers in place, machines can run at faster speeds and the web is far less likely to drag and get damaged. These improvements in shaft and roller performance directly affect productivity and increase machine throughput.
|Why Carbon Fibre Rollers / Rolls?
Carbon fibre idler rollers have low rotational inertia, high stiffness, a high stiffness to density ratio, low mass, and low momentum.
|Low Rotational Inertia
(Reduced mass moment of inertia by up to 80%)
|Rollers spin at line speed. Serrations are not used so dust is not created.||Far less web scratching.|
|Reduced roller wear.|
|Dissipates static electricity.|
|Quicker response to changes in line speed.||Fewer web breaks.|
|Far less start-up waste.|
|Less web stretch.|
|Less web wrap-up in the event of a web break.|
|Extended idler roller life and reduced coating thickness.|
|Less horsepower and/or fewer motors required.||Lower energy consumption.|
|Less deflection||Less web wrinkling.|
|Longer bearing life.|
|High Specific Modulus
(High Stiffness to Density Ratio)
|Faster line speeds with less vibration (higher critical speed).||More throughput and better product quality.|
|Less self-loaded deflection.||Less web wrinkling across wider spans.|
|Low Mass||Super lightweight.||Easier and safer handling.|
|Less bearing wear.||Longer bearing life.|
|Low Momentum||More accurate transducer measurements.||More precise tension
|Less lay-on roller bounce.||Higher quality wound rolls with less air entrainment.|
|Quicker dancer and accumulator roller response.||Better dancer and festoon performance with consistent tension control
and less web stretch.
Lightweight, high-stiffness carbon fibre rollers exhibit lower inertia to acceleration and deceleration (rotational or translational), and can run at higher speeds. Composite rollers reduce waste while increasing productivity and efficiency. Carbon fibre idler rollers provide better performance than traditional steel or aluminium rollers, particularly when wide web widths, heavy loads, and faster speeds are necessary. Consider this example where a 164 inch steel roller with an 11.25 inch O.D. was replaced with a carbon fiber roller with the same dimensions:
|Existing Steel Roller||1000 lbs.||34,330 lb.-in.2|
|Light-Speed Carbon Fibre Roller||220 lbs.||4200 lb.-in.2|
Carbon fibre rollers can be coated with most of the same materials that metal rollers can be coated with. Many standard coatings are available (shown below), but please ask if you want a specific type of coating.
Dura-Stat: STANDARD COATING. Wear resistant, conductive polyurethane which works to prevent buildup of static charge on rollers. Suits most idler roll applications. Economical, resistant to most chemicals and abrasion, repairable, and replaceable. Black in color with an appealing satin finish. Surface Finish: 32 µin Ra (0.8 µm Ra).
Various plasma spray coatings offer wear resistance, traction, and release properties.
Double E introduced carbon fibre shafts to the converting industry in 1986. Carbon fibre is ideal in the manufacture of lightweight, high strength rollers of all kinds. As a housing material, carbon fibre exhibits the high stiffness of steel at a fraction of the weight. For web operators and maintenance supervisors, the weight reduction means a lot less work getting the rollers in place, and faster critical line speeds once the rollers are in service. These improvements translate into greater productivity, fewer back injuries, and higher profits.
Extruded aluminum rollers for web processing applications.
Carbon fiber core shafts minimize shaft weight without sacrificing strength or stiffness; perfect for unwind and rewind converting applications.
Double E safety chucks make shaft loading simple. Flange or foot-mounted models available with turned square, square, circular, or triangular shaft engagements.