Optimized build-up process of film rolls by enhanced reversion control
The reversing haul-off unit at today`s blown film extrusion lines is supposed to reduce the effects of thickness tolerances during the winding process of film rolls. The thickness profile differences are rearranged along the width of the film roll. Most process setups in the blown-film-extrusion production do not use the reversion for specific optimization. A new developed simulation model and programmed tool at the University of Duisburg-Essen shows details to critical effects of thickness tolerances in the build-up process of film rolls. In correlation with known winding defects, potentials to optimize the production by a proper reversion control are shown. The optimization ranges from adjusted speed levels according to the roll diameter to timed positioning of very critical areas within the roll-changing process and the start of a new film roll build-up. The optimization potentials are summarized in an enhanced control setup to connect the extrusion process and the winding for good roll and film quality.
pdf-file, 18 Pages, 2.2 MB
The Journal of Plastics Technology is a peer reviewed internet periodical published under the auspices of the Scientific Alliance of Polymer Technology (WAK)
International Polymer Processing, the journal of the Polymer Processing Society, is a discussion forum for the world-wide community of engineers and scientists in the field of polymer processing.
The journal covers research and industrial application in the very specific areas of designing polymer products, processes, processing machinery and equipment.
The Journal of Plastics Technology is indexed in SCOPUS, the largest abstract and citation database of peer-reviewed literature.