WINDING-UP PROCESS AND MACHINE FOR WINDING UP WEBS OF PAPER OR CARDBOARD

摘要

The present invention relates to a process and a machine for winding up a web (1) of paper or cardboard onto winding sleeves (14) in which a) during the winding-up process, the winding-up roll (3) is pressed with an adjustable contact pressure against a driven support roller (4) that has an outer layer (6) the volume of which can be can be compressed, said layer being at least 5 mm thick, of a cellular plastic material with a plurality of uniformly distributed pores and a modulus of compression it of less than 10 MPa; b) the web (1) that is fed to the winding-up roll (3) wraps around the support roller (4) ahead of the nip (7) between the winding-up roll (3) and the supporting roll (4) in an area of the periphery of the roller; c) depending on the construction of the outer layer 6 on the support roller, i.e., on its configuration and material characteristics, the contact force of a winding-up roll on the support roller is so adjusted that a nip 7 is formed, said nip being of a width b as measured in the direction of the roll periphery as follows: - at least 5 mm at an end production speed of more than 1000 m/min; - at least 15 mm at an end production speed of more than 2000 m/min; - at least 40 mm at an end production speed of more than 3000 m/min; - at least 70 mm at an end productionspeed of more than 4000 m/min; the web (1) that runs out of the nip (7) is drawn off by means of an additional peripheral or central drive system (13) with a force of at least 1 N/cm web width