Device for the hot granulation of thermoplastic polymers

Details Device for the hot granulation of thermoplastic polymers Device for the hot granulation of thermoplastic polymers

2008-01-22

2008-01-22

Gupta, Yogendra (Department: 1722)

Plastic article or earthenware shaping or treating: apparatus

Means providing a shaping orifice

Single inlet, plural shaping orifices

C425S067000, C425S311000, C425S378100

Reexamination Certificate

active

07320585

ABSTRACT:
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.

REFERENCES:
patent: 3341892 (1967-09-01), Mayner
patent: 4179255 (1979-12-01), Hale
patent: 4606873 (1986-08-01), Biglione et al.
patent: 4678423 (1987-07-01), Bertolotti
patent: 5290496 (1994-03-01), Carduck et al.
patent: 305 862 (1989-03-01), None
U.S. Appl. No. 10/499,323, Casalini, filed Jan. 26, 2005.

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