Device for the hot granulation of thermoplastic polymers

B - Operations – Transporting – 29 – B

Patent

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Details

B29B 9/06 (2006.01) B29C 47/30 (2006.01) B29C 47/86 (2006.01) B29C 35/16 (2006.01) B29C 44/34 (2006.01)

Patent

CA 2469828

Device for the hot granulation of thermoplastic polymers, optionally expandable, which comprises: a) a die (1) containing a series of small plates (6), equipped with a series of extrusion holes, and a plurality of feeding ducts (3) situated inside the die body (2) in correspondence with the perforated small plates (6), lined with a material having a high thermal conductivity (4); b) a cutting chamber comprising a set of spraying nozzles (17) which create a jet of drops of a thermostat-regulating liquid for cooling the cut granules; c) a cutting system comprising a cutting plate (13) supporting a set of knives (15) arranged so that the cutting profile of the knife is radial with respect to the die.

L'invention concerne un dispositif de granulation à chaud de polymères thermoplastiques, éventuellement expansibles, comprenant: a) une filière (1) contenant une série de petites plaques (6), dotées d'une série de trous d'extrusion, et plusieurs conduits d'alimentation (3) à l'intérieur du corps de la filière (2), en correspondance avec les petites plaques perforées (6), recouverts d'un matériau possédant une conductivité thermique élevée (4), b) une enceinte de découpe comprenant un ensemble de buses de pulvérisation (17) créant un jet de gouttes d'un liquide régulé thermiquement destiné à refroidir les granulés découpés, c) un système de découpe comprenant une plaque de découpe (13) supportant un ensemble de couteaux (15) agencés de façon que le profil de découpe soit disposé radialement par rapport à la filière.

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