STEEL BELT BLOG by DYMCO, LTD. : Web handling rolls #2 of 4

Tuesday, November 18, 2014

Web handling rolls #2 of 4

The second roll is 'a low-inertia roll.'
This roll is different from conventional rolls,
for it does not rotate itself,
rather the surface thin-wall sleeve only rotates.

This mechanism is that air splashes out from small holes over the roll core and expands diameter of the surface thin-wall sleeve.
When a film goes through this roll, the surface thin-wall sleeves rotates along with speed of the film.
This is why inertial of this roll is just twentieth and less of the conventional rolls.

In general to gain lower inertia, small-diameter rolls are used for production of thin and wide films. However, this small and long rolls inevitably bow when they receive loads. Here our low-inertia rolls maintain straightness and low-inertia state due to the above structure.