METHOD FOR CONTINUOUS CASTING AND GRANULATION OF STRANDS FROM THERMOPLASTIC
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United States of America Patent
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app pub date -
Dec 12, 2013
filing date -
Nov 20, 2008
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Abandoned
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Abstract
A method 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 member 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 member the feed rollers of the cutting unit, of at least 100 m/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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