| 摘要 |
The invention relates to a flat-folding device (1) for films or tubular films (6) extruded by blown film extrusion installations (1). Said installation (1) comprises at least one roller (16) which (16) guides the walls of the film or the tubular film (6). The flat-folding device (1) comprises at least one device (B, 24, 22, 23, 21, 20, 25, 26) for influencing the rotational speed of the at least one roller (16). Said device (B, 24, 22, 23, 21, 20, 25, 26) comprises means (9) for providing a torque (B, 24) that can be transferred onto the at least one roller (16) by means of transfer devices (22, 23, 21, 20). Unlike prior art devices, the inventive device is provided with transfer devices (22, 23, 21, 20) which allow a slip between the at least one roller (16) and the devices (24) for providing torque. |
