DEVICE AND METHOD FOR CONTINUOUS CASTING AND GRANULATION OF STRANDS FROM THERMOPLASTIC
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United States of America Patent
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Issued Date -
Sep 8, 2011
app pub date -
Nov 10, 2009
filing date -
Nov 20, 2008
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
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.
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