THICKNESS PROFILE EFFECTS ON THE BUILD-UP PROCESS OF FILM-ROLLS IN THE WINDING PROCESS

摘要

A high percentage of today's blown-film-extrusion machines is equipped with a reversing system. The reversing draw-up unit is supposed to rearrange tolerances of the thickness profile on the film-roll within the winding process. Most process setups in the blown-film-extrusion production have a standardized reversing speed or do not use the reversion. A new simulation model developed at the University of Duisburg-Essen can show the critical effects of these setups in the build-up of film rolls and links them to detected defects in today's production.