Calender roll system
AssigneeVoith Sulzer Papiertechnik Patent GmbH
InventorFranz Kayser
Life of this patent
Estimating the term…
Abstract
A calender roll system and method for operating the same. The calender roll system includes a roll stack having at least one center roll positioned between two end rolls, in which each of the at least one center roll and the two end rolls have a drive mechanism, and in which the rolls can be loaded in a stacking direction. The method includes loading the rolls to form at least one working nip with at least one center roll, and, in the at least one working gap, bending the at least one center roll out of the plane of the roll stack. Reaction forces required to bend the at least one center roll are generated by corresponding adjustment of drive moments of the at least one center roll.
Claims22
A calender roll system for web material comprising:
- a plurality of rolls arranged along a stack plane in a roll stack, the plurality of rolls including at least one center roll positioned between at least two end rolls;
- each of the at least two end rolls and the at least one center roll having a drive mechanism for driving each roll and adapted to be loaded in a stacking direction;
- the at least one center roll having a slenderness ratio greater than approximately 10;
- and
- a control device for adjusting drive moments of each drive mechanism,
- wherein the control device is adapted to vary a transverse compressive strain profile by adjusting the drive moments of each of the at least two end rolls and the at least one center roll, and
- wherein the at least one center roll is adapted to be deflected out of the stack plane when the control device varies the drive moments.
A calender roll system for web material comprising:
- a plurality of rolls arranged to be moveable along a stack plane in a roll stack, the plurality of rolls including at least one center roll positioned between at least two end rolls;
- each of the at least two end rolls and the at least one center roll having a drive mechanism for driving each roll and adapted to be loaded in a stacking direction;
- the at least one center roll having a slenderness ratio greater than approximately 10;
- and
- a control device for adjusting drive moments of each drive mechanism;
- and
- a measurement device for measuring at least one parameter of the web,
- wherein the control device is adapted to vary a transverse compressive strain profile by adjusting the drive moments of each of the at least two end rolls and the at least one center roll, and
- wherein the at least one center roll is adapted to be deflected out of the stack plane when the control device varies the drive moments.
A calender roll system for web material comprising:
- a plurality of rolls arranged to be moveable along a stack plane in a roll stack, the plurality of rolls including at least one center roll positioned between at least two end rolls;
- each of the at least two end rolls and the at least one center roll having a drive mechanism for driving each roll and adapted to be loaded in a stacking direction;
- the at least one center roll having a slenderness ratio greater than approximately 10;
- and
- a control device for adjusting drive moments of each drive mechanism;
- and
- a measurement device for measuring at least one parameter of the web,
- wherein the control device is adapted to monitor the at least one parameter of the web and vary the drive moments to control the at least one parameter and is adapted to vary a transverse compressive strain profile by adjusting the drive moments, and
- wherein the at least one center roll is adapted to be deflected out of the stack plane when the control device varies the drive moments.
Dependencies are inferred from the claim text.