Method and device for crystallising plastic granules with a tendency to conglutinate, particularly PET and PU granules
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United States of America Patent
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Jan 5, 2010
Grant Date -
Jul 17, 2008
app pub date -
Mar 13, 2008
filing date -
Aug 29, 2005
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Abstract
In a method for crystallising plastic granules with a tendency to conglutinate, in particular PET and PU granules, the granules are subjected to vibratory excitation in a vibrating trough (1) transversely to the direction of longitudinal extension of the vibrating trough (1), at around their reaction temperature. The flow of granules follows a spiral path through the trough, achieving a narrow dwell time spectrum and a homogenous temperature gradient for the granules. Conglutination is also reliably prevented.
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