Abstract
An induction heated jacket roll is regarded as an ideal heat roll, which gives uniform surface temperature with a good CD profile.Traditional heat rolls which use heated thermal medium produce uneven temperature profiles and cause higher temperature at the both ends of the rolls. This results in variation in a roll diameter CD profile and finally results in sheet thickness variation.The roll of this paper has an induction heat device inside and is jacketed like a heated pipe. With the combined effect by them, the temperature variation in a radial direction is compensated and the roll CD diameter profile is very well stabilized.Now, super soft calender rolls with a max. temperature of 360 degree C are successfully in operation.
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