Method and device for winding a material web
AssigneeValmet Corporation
InventorIsmo Turunen
Life of this patent
Estimating the term…
Abstract
A method and device for winding a material or fibrous web, wherein a number of separate web rolls are formed around separate roll cores placed one after another and side by side, while being supported by support members and loaded by a load of rider rolls in rider roll units in a truncated rider roll unit. During disturbed winding situations when the web roll separate from the winding rolls, the attachment of the rider roll unit/units to the rider roll beam is changed so that the rider rolls load the web rolls that are in a disturbed movement with a load substantially higher than the rider roll load during normal winding.
Claims28
A method in winding of a material web in which a plurality of separate web rolls are formed around a respective roll core, the web rolls being arranged one after another and side by side, each web roll being supported by and in contact with support members and loaded by a load produced by at least one rider roll, comprising the steps of:
- mounting the at least one rider roll on a rider roll beam, and
- adjusting the coupling between the at least one rider roll and the rider roll beam in a situation of disturbed winding when the respective web roll separates from the support members in comparison to a normal winding situation when the respective web roll is in contact with the support members such that the at least one rider roll is coupled to the rider roll beam in a first manner during disturbed winding and in a second manner different than said first manner during normal winding so that the at least one rider roll produces a higher load during disturbed winding than during normal winding.
A device in winding of a material web in which a plurality of separate web rolls are formed around a respective roll core, the web rolls being arranged one after another and side by side, each web roll being supported by and in contact with support members and loaded by a load produced by at least one rider roll coupled to a rider roll beam, comprising
- attenuation means for attenuating a disturbed movement of at least one of the web rolls when the at least one web roll separates from the support members, said attenuation means comprising means for adjusting the coupling of the at least one rider roll loading the at least one web roll during the disturbed movement such that the at least one rider roll is coupled to the rider roll beam in a first manner during the disturbed movement and in a second manner different than said first manner during normal winding of the at least one web roll so that the at least one rider roll produces a higher load during the disturbed movement than during normal winding when the respective web roll is in contact with the support members.
A method in winding of a material web in which a plurality of separate web rolls are formed around a respective roll core, the web rolls being arranged one after another and side by side, each web roll being supported by and in contact with support members and loaded by a load produced by at least one rider roll, comprising the steps of:
- mounting the at least one rider roll on a rider roll beam,
- measuring the acceleration of the rider roll beam, and
- generating a signal based on the measured acceleration of the rider roll beam, and
- adjusting the coupling between the at least one rider roll and the rider roll beam in a situation of disturbed winding when the respective web roll separates from the support members in comparison to a normal winding situation when the respective web roll is in contact with the support members based on the signal such that the load produced by the at least one rider roll is higher during disturbed winding than the load produced by the at least one rider roll during normal winding.
A device in winding of a material web in which a plurality of separate web rolls are formed around a respective roll core, the web rolls being arranged one after another and side by side, each web roll being supported by and in contact with support members and loaded by a load produced by at least one rider roll coupled to a rider roll beam, comprising
- attenuation means for attenuating a disturbed movement of at least one of the web rolls when the at least one web roll separates from the support members, said attenuation means comprising coupling adjustment means for adjusting the coupling of the at least one rider roll loading the at least one web roll during the disturbed movement such that the load produced by the at least one rider roll during the disturbed movement is higher than the load produced by the at least one rider roll during normal winding when the respective web roll is in contact with the support members,
- a fastening bracket connected to the rider roll beam, and
- a fastening member connected to each of the at least one rider roll, said coupling adjustment means comprise a coupling extending between said fastening bracket and said fastening member connected to each of the at least one rider roll.
A device in winding of a material web in which a plurality of separate web rolls are formed around a respective roll core, the web rolls being arranged one after another and side by side, each web roll being supported by and in contact with support members and loaded by a load produced by at least one rider roll coupled to a rider roll beam, comprising
- attenuation means for attenuating a disturbed movement of at least one of the web rolls when the at least one web roll separates from the support members, said attenuation means comprising coupling adjustment means for adjusting the coupling of the at least one rider roll loading the at least one web roll during the disturbed movement such that the load produced by the at least one rider roll during the disturbed movement is higher than the load produced by the at least one rider roll during normal winding when the respective web roll is in contact with the support members,
- the load of the web rolls being produced by at least one cylinder actuated by a pressure medium,
- said coupling adjusting means comprising
- an acceleration detector for detecting acceleration of the rider roll beam and generating a signal representative thereof,
- regulating means for regulating the flow of the pressure medium to the at least one cylinder, and
- a regulator for receiving the signal representative of the acceleration of the rider roll beam from said acceleration detector and controlling said regulating means based thereon.
Dependencies are inferred from the claim text.