公开(公告)号：US20230241830A1

公开(公告)日：2023-08-03

申请号：US18100025

申请日：2023-01-23

Applicant: HOSOKAWA ALPINE Aktiengesellschaft

Inventor： Bernd BAYER ,  Georg SCHARPF ,  Hans-Peter SCHÜLE

IPC: B29C48/92 ,  B29C48/00 ,  B29C55/28

CPC classification number: B29C48/92 ,  B29C48/0018 ,  B29C55/28 ,  B29C48/0022 ,  B29C2948/92152 ,  B29C2948/92447 ,  B29C2948/92647 ,  B29C2793/009

Abstract: The thickness profile of a film tube manufactured using a film blowing process is regulated using a control system consisting of segmented control zones and at least at two measuring units for the film thickness such that the specified target film thickness profile exhibits deviations from a uniform film thickness in the form of one or two thin spots opposite each other, which serve to compensate for film thickness changes across the film width which occur during the monoaxial orientation in machine direction so that a film web is produced as a result of orientation whose thickness profile has as few deviations as possible from the target thickness across the entire width of the film web, the final film should exhibit a thickness profile where the thickness increase from the middle of the film to the edges is as minor as possible and the flatness of the film is improved.