Winding machine and method for controlling a second nip pressure
AssigneeABB Schweiz AG
InventorsTapio Talvitie, Pertti Vainio, Jukka Gruzdaitis
Life of this patent
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Abstract
A winding machine for winding a finishing roll having a radius R of a sheet material on a core having a radius rc is provided. The winding machine includes: a support drum assembly arranged on a first side of the finishing roll and configured to support the finishing roll from the first side; a rider roll arranged on a second side of the finishing roll opposite to the first side and configured to apply a first nip pressure onto the finishing roll from the second side the finishing roll being supported by the support drum assembly; and a control unit configured to adaptively control the second nip pressure applied by the rider roll onto the finishing roll depending on an ascent rate of the rider roll.
Claims15
A winding machine for winding a finishing roll having a radius R of a sheet material on a core having a radius re, comprising:
- a support drum assembly arranged on a first side of the finishing roll and configured to support the finishing roll from the first side;
- a rider roll arranged on a second side of the finishing roll opposite to the first side and configured to provide a second nip pressure onto the finishing roll from the second side while the finishing roll is supported by the support drum assembly;
- and
- an adaptive control unit configured to adaptively control the second nip pressure applied by the rider roll onto the finishing roll depending on an ascent rate of the rider roll, which is proportionate to a derivative of the radius of the finishing roll.
A method for controlling a second nip pressure applied by a rider roll onto a finishing roll during winding of a sheet material on the finishing roll, comprising:
- supporting the finishing roll by a support drum assembly arranged on a first side of the finishing roll and configured to support the finishing roll from the first side;
- and
- adaptively controlling, via an adaptive control unit, the second nip pressure applied by a rider roll onto the finishing roll, wherein the rider roll is arranged on a second side of the finishing roll opposite to the first side,
- wherein the second nip pressure is adaptively controlled depending on an ascent rate of the rider roll, which is proportionate to a derivative of a radius of the finishing roll.
Dependencies are inferred from the claim text.