Patent ID: 6062838
Filing Date: 2000-05-16
Classification: B29C,D01D

Abstract:
A device for extruding yarns from a molten polymer material, comprising:distribution channels through which molten polymer material is fed;spinning nozzles in communication with said distribution channels for receipt of said molten polymer material;a cooling system having a blowing nozzle disposed to deliver cooling air to said spinning nozzles to cool said yarns extruded from said molten polymer material through said spinning nozzles, said blowing nozzle disposed generally at a center of an area defined by said spinning nozzles and configured to distribute said cooling air outward from said center towards said spinning nozzles, said cooling system also comprising a channel in communication with said blowing nozzle to deliver cooling air to said blowing nozzle in an essentially vertical direction;said blowing nozzle comprising an upper plate member and a lower plate member spaced apart from said upper plate member and facing said spinning nozzles, said plate members defining a guide therebetween wherein said cooling air moves from an initial vertical direction in said channel, into said guide, and is redirected to a generally horizontal direction by said guide, said plate members defining an outlet opening wherein said cooling air exits said guide and is directed to said spinning nozzles; anda first bend defined in said lower plate member of said guide upstream of said outlet opening and downstream from where said cooling air changes direction from said initial vertical direction to said generally horizontal direction in said guide, said first bend defining a crest on a side away from said spinning nozzles and having a shape such that said cooling air is compacted and deflected thereby thus generating a velocity profile for said cooling air exiting said outlet opening wherein said cooling air emerging adjacent said lower plate member at said outlet opening is at a greater velocity than said cooling air emerging adjacent said upper plate member.