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

摘要

A process and machine are disclosed for winding-up paper or cardboard webs (1) on winding tubes (14). The winding-up rollers (3) are pressed during winding with an adjustable force against a driven support roller (4) provided with a volume-compressible outer layer (6) at least 5 mm thick made of a cellular plastic material with a plurality of uniformly distributed pores and a compression module ? lower than 10 MPa. The web (1) supplied to one winding-up roller (3) is twisted around an area of the circumference of the support roller (4) upstream of the nip (7) between the winding-up roller (3) and the support roller (4). The force with which a winding-up roller (3) is pressed against the support roller (4) is adjusted depending on the structure of the outer layer (6) to form a nip (7) with a minimum width b which depends on the final production speed. The web (1) that runs out of the nip (7) is then pulled with a force of at least 1 N/cm web width by means of an additional circumferential or central drive (13).