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1. (WO2001005566) METHOD AND DEVICE FOR FEEDING AND TREATING PLASTIC STRANDS

Pub. No.:    WO/2001/005566    International Application No.:    PCT/EP2000/006691
Publication Date: Fri Jan 26 00:59:59 CET 2001 International Filing Date: Fri Jul 14 01:59:59 CEST 2000
IPC: B29B 9/06
B29C 35/16
B29C 47/88
Applicants: RIETER AUTOMATIK GMBH
Inventors: GLÖCKNER, Frank
STEINBACHER, Werner
Title: METHOD AND DEVICE FOR FEEDING AND TREATING PLASTIC STRANDS
Abstract:
The invention relates to a method for feeding and treating plastic strands that are discharged from nozzles in a molten state by means of a cooling section in order to granulate the plastic strands. According to the invention, the plastic strands are partially crystallized in a temperature-adjusted liquid medium in a crystallization section once they are discharged from the nozzles, the liquid medium being maintained at a temperature above the glass transition temperature of the plastic strands. The invention further relates to a device for carrying out said method. The inventive device comprises a plastic melting device, a device for extruding the strands from nozzles, a crystallization section that is located directly downstream of the nozzles, and a granulation device that is located downstream of the crystallization section. The temperature of the crystallization section is adjusted by means of heating and/or cooling devices and is provided with temperature adjusting elements with which the temperature of the temperature-adjusted liquid medium can be adjusted to a temperature above the glass transition temperature of the plastic strands.