| 摘要 |
In the extrusion apparatus for plastics foil, a smoothing rolling mill (2) is allocated to a device (1) for extruding a soft, warm plastic, in the plasticizing cylinder (3) of which, the plastic is brought to processing temperature and from this conveyed out through a fishtail die (6) by means of a conveyor screw (5), whereby a displaceable filter band (8) is inserted before the fishtail die. In this connection, the filter band (8) has a width of at least approximately the inlet-side width of the fishtail die (6) and is displaceably situated at right angles to the longitudinal extension of the die (6). Through these measures, an extension apparatus for manufacturing foil out of plastic results, which permits with low filter consumption and optimal and functionally reliable control, the manufacture of a high-quality foil.
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