DEVICE AND METHOD FOR CALIBRATING FILM TUBING

摘要

The invention relates to a device (1) for calibrating film tubing (2) that can be extruded by means of a film blowing die (3). A feature thereof is a ring (4), along the inner wall (5) of which the extruded film tubing can be guided, and a cooling fluid provision device (12) by means of which a cooling fluid (15) can be provided and fed between the inner wall and the film tubing. Said ring comprises at least one open chamber (20) in the region of the ring where the film tubing exits said the ring, wherein the at least one opening (22) of the chamber faces the film tubing and is closed by at least one fluid-permeable web part (21). The chamber can have a vacuum applied thereto.