| 摘要 |
The device, suitable in particular for an injection moulding machine, consists of a heatable extruder barrel (1) in which a screw having two compression sections (22, 25) and a decompression section (24) lying therebetween rotates. At the discharge side, the extruder barrel (1) has a feed opening (11) and, in the region of the decompression section (24), a devolatilisation opening (12). In order to devolatilise the granules universally without predrying, an adjusting metering device (3) is arranged above the feed opening (11). On the other hand, the screw flight is interrupted after the first compression section (22) by an annular collar (28) which, together with the barrel wall, forms a shearing gap. The screw flight in the subsequent decompression section (24) is cut 20% deeper than the screw flight of a feed section (21). The devolatilisation opening (12) is arranged in the first third of the decompression section (24). <IMAGE>
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