China Rubber Roller manufacturer
SHIJIAZHUANG HUATAO IMPORT AND EXPORT TRADE CO., LTD.
SHIJIAZHUANG HUATAO IMPORT AND EXPORT TRADE CO., LTD.
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Unique Structure Rotate Freely Spreader Roll High Temperature Resistance

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SHIJIAZHUANG HUATAO IMPORT AND EXPORT TRADE CO., LTD.

City: shijiazhuang

Province/State:hebei

Country/Region:china

Tel:86-0311-68008382

Contact Person:
Mr.Jack Yang
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Unique Structure Rotate Freely Spreader Roll High Temperature Resistance

Brand Name HUATAO
Model Number SPREADER ROLL
Certification ISO
Place of Origin CHINA
Minimum Order Quantity 1 Pc
Price 2000USD/pc-5000USD/pc
Payment Terms L/C,D/P
Supply Ability 50000 Pcs/Year
Delivery Time 1-3 Months
Packaging Details Wooden Cases
Product Name Unique Structure Rotate Freely Spreader Roll High Temperature Resistance
Key Words Bow Roll, Expander Roll, Banana Roll, Spreader Roll
Surface Material Metal, Rubber Coated, etc
Rubber Material Synthetic Rubber, EPDM, Polyurethane, NBR, etc
Maximum Face Length 12000mm
Maximum Speed 1500m/min
Application For Winder And Rewinder Machine
Advantage Long Life Span
Detailed Product Description

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

Paper industry

Forming fabrics 25-20°

Wet felts 30-60°

Paper/board 15-30°

Film and Foil industry

Films PP and PA

1-6 Micron 60-90°

8-20 Micron 45-60°

More than 20 Micron 45°

Metalised films 15-20°

Textile industry

General 45-60°

Extensible fabrics 60-90°


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.



Product Tags: Unique Structure Spreader Roll   Freely Rotate Spreader Roll   High Temperature Resistance Spreader Roll  
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