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OwnerStefan Deiss, Frank Glöckner +1inventors
InventorsStefan Deiss, Frank Glöckner, Stefan Dahlheimer
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The invention relates to an apparatus for continuous casting and granulating strands of a thermoplastic material which uses a nozzle head having a plurality of nozzle apertures of a maximum diameter of 4 mm each, and water-moistened guide means for cooling and guiding the plastic strands exiting the nozzle aperture via inlet rollers to the inlet of the cutting unit for chopping up the plastic strands into granules approx. 2-3 mm in length. The flow rate of the melt, with the strands being cooled down on their way from the nozzles via the guide means to the feed rollers of the cutting unit, of at least 100 nm/min in the central spatial region of the nozzle apertures will be increased to such an extent that the cutting unit will chop up the strands at a cutting rate of >2,000 cuts/s.
An apparatus for continuous casting and granulating strands (4) of a thermoplastic material which uses a nozzle head (1) having a plurality of nozzle apertures (2) of a maximum diameter of 4 mm each, and water-moistened guide means (6) for cooling and guiding the plastic strands (4) exiting the nozzle opening (2) via feed rollers (8, 9) to the inlet of a cutting unit (10) for chopping up the plastic strands to form granules (12) of a length of between 2 mm and 3 mm each, characterized by an increase of the flow rate of the melt—simultaneously cooling down the strands (4) as they pass from the nozzles via the guide means (6) to the feed rollers (8, 9) of the cutting unit—which is at least 100 m/min in the central spatial region of the nozzle apertures (2), to such an extent that the cutting unit (10) will chop up the strands (4) at a cutting rate of >2,000 cuts/s.
Dependencies are inferred from the claim text.