| 摘要 |
The invention relates to a device for producing tubes for packaging tubes, comprising an elongated mandrel (3), around which a substrate web can be shaped in order to produce a tubular form (4), which surrounds the mandrel (3) and can be conveyed along the mandrel (3) in a conveying direction (R), welding means (9) for welding the substrate web along a welding region in order to form a weld (11), and at least one first welding strip (34), which can be conveyed together with the tubular form (4) and which secures the tubular form in a contact region of the substrate web where said web overlaps by clamping the substrate web between the first welding strip (34) and a clamping partner, in particular a second welding strip (35). Furthermore, means (13) are provided for expanding the tubular form (4), which is secured by the first welding strip (34) and the clamping partner, by plastically elongating the substrate web in the circumferential direction. |
