Patent ID: 6493938
Filing Date: 2002-12-17
Classification: D21F,D21G,F16C,Y10T

Abstract:
A method for manufacturing a roll for a paper/board machine, comprising:applying onto a roll body, a coating which comprises at least one layer of continuous fibers impregnated with thermoplastic resin and at least one layer of thermoplastic resin which has not been reinforced; impregnating a continuous bundle of fiber or a narrow fiber mat (10) with a suitable thermoplastic-matrix polymer (20) in an impregnation head (40) of a first extruder (30) to a desired fiber content at a melt-processing temperature suitable for said polymer, cooling an impregnated band (50) that is discharged from the first extruder and passing said impregnated band to a nozzle for addition of a thermoplastic resin layer at a second extruder (60) where said band is coated with a thermoplastic resin and from the first extruder, passing the band onto a winding unit (80), wherein said winding unit is attached to a sledge (90) running at a side of the roll body, transferring a winding head with said sledge while the roll body (100) revolves so that the whole roll body is covered by the band that has been impregnated and coated; and right before the band is affixed to a roll face, heating said band is and after an adhesion stage, pressing the band with high force against the roll face.