| 摘要 |
The invention relates to a device for producing blown films, comprising an extrusion device generating a tubular film (1) and a flattening device, associated with the tubular film (1), having two flattening elements, arranged on diametrically opposite zones of the tubular film and adjustable in relation to each other at an acute angle, for transforming the cross-section of the tubular film (1), which is first circular, then oval, to a double-layer film web. The invention is characterized in that lateral guide elements (2) for the zones of the tubular film (1) that are omitted by the flattening elements are arranged between the flattening elements and are associated with the tubular film and the lateral guide elements (2) have an adjustable contour. |
