Unique Structure Rotate Freely Spreader Roll High Temperature Resistance

Spreader roll basis information

Expander roll is known as Spreader Rolls, Bowed Rolls, Curve bar Expanders, Banana Rolls, Camber Rolls, and Wrinkle removing Rolls.

Most of the expander rolls are driven by web tension itself without any extra drive. Used in Textile processing machines, Plastic converting machines, Paper Industries, manufacturing, processing, printing, laminating, coating, Batching, Winding, and Re-Winding.

The spreading effect of the spreader roll is obtained through the curved steel shaft onto which rotate some rolls mounted on ball bearings. Externally onto the rolls is fitted, as a rule, a rubber sleeve which is free to rotate . The curved spreader rolls is used for plastic films, paper, fabrics and similar products, or any time the installation of other types of roll is impossible.

Spreader roll warpping angle

The wrapping angle "W" is determined by the type of material being processed.

The following angles of wrap are recommended

Expander roll working principle

The difference between normal straight roller and expander roller is whether the axis has radian. In fact, we can think of a normal straight roller as a special expander roller with an axis radius of infinite days. In the process of paper production and processing, due to the shrinkage force of paper cross-section, the paper often appears wrinkles during operation. In the application of the arc roller, when the coil is close to the entrance span L of the arc roller, the edges of both sides of the paper begin to tilt towards the end of the corresponding arc roller, and then slowly stretch the paper to obtain the tension effect, so as to prevent wrinkling. When the paper contacts the surface of the curved roller, the edge of the paper will move further, so that every point of the paper is transported perpendicular to the roller surface.

Expander roll surface

Expander roll with hard chrome: deliver big torque, good sealing,rotate freely, not to come out of the joint, no leakage of oil.

Expander roll with rubber cover: resist of abrasion, long work life. Adopt unique structure on the both end of the roll to ensure the cover not to expansion and contract.

Expander roll function

Expander roll is widely used for paper, film, texitiles and similar machine and equipment.

In the process of paper production and processing, due to the shrinkage force of paper cross-section, the paper often appears wrinkles during operation. And the bow roll in the paper wrinkle has superior performance. The main function of the tension roller in the transverse direction is the anti crease function. The selection of the arc roller will determine the tightness of the paper, thus affecting the anti wrinkle effect.