| 摘要 |
METHOD AND APPARATUS FOR AN OSCILLATING PINCH ROLL ASSEMBLY UTILIZED IN THE EXTRUSION OF BLOWN FILMS In one embodiment, the oscillating pinch roll assembly or web handling apparatus includes a rotatable spindle having an input which accepts the tubular web. A pinch roller is mounted at the input. A plurality of rollers are circumferentially disposed around the pinch roller and the axis of rotation of those rollers is parallel to the center line of the tubular web. A turning bar is disposed in the interior of the spindle and turns the flattened web exiting the pinch rollers 90 degrees and feeds the horizontal web to a first roller of the plurality of rollers disposed at the periphery of the spindle. The traveling web always passes over this first roller. By rotating the spindle in an oscillatory manner about the center axis of the tubular web, the horizontally traveling, flat web is wound and unwound around the outer periphery of the spindle and is fed to a fixed idler roller. |
