Device for crimping multifilament threads

Abstract

A technique for crimping multifilament threads involves a device having an injector installation and having a stuffing installation. The injector installation has a conveying duct having a thread inlet. The conveying duct of the injector installation opens into a stuffer chamber of the stuffing installation. The stuffer chamber in an upper chamber portion, between a plurality of wall portions of a chamber wall, has a plurality of slot-shaped air-exhaust openings. The wall portions of the chamber wall, in order to configure the air-exhaust openings, each have one flow edge which is aligned so as to be tangential to a chamber circle.

1 . Device for crimping multifilament threads, having an injector installation and having a stuffing installation, wherein the injector installation has a conveying duct having a thread inlet, wherein the conveying duct of the injector installation opens into a stuffer chamber of the stuffing installation, wherein the stuffer chamber in an upper chamber portion, between a plurality of wall portions of a chamber wall, has a plurality of slot-shaped air-exhaust openings, and wherein the wall portions of the chamber wall, in order to configure the air-exhaust openings, each have one flow edge which is aligned so as to be tangential to a chamber circle. 
     
     
         2 . Device as claimed in  claim 1 , wherein the flow edges of the wall portions, based on a diameter of the chamber circle, are configured so as to be symmetrical in a mutually adjacent manner. 
     
     
         3 . Device as claimed in  claim 1 , wherein the chamber circle, in order to align the flow edges, in terms of diameter is chosen so as to be smaller than or equal to a cross-sectional envelope of the stuffer chamber. 
     
     
         4 . Device as claimed in  claim 1 , wherein the wall portions of the chamber wall are formed by a plurality of fins, wherein the flow edges are formed on internal sides of the fins and wherein the air-exhaust openings each extend between two adjacent fins. 
     
     
         5 . Device as claimed in  claim 4 , wherein the fins, so as to form a round chamber cross section of the stuffer chamber, are disposed beside one another in an overlapping manner. 
     
     
         6 . Device as claimed in  claim 4 , wherein the fins in an internal wall region have a plurality of bores which open into an air-exhaust duct. 
     
     
         7 . Device as claimed in  claim 1 , wherein the fins are disposed on a support, wherein the free ends of the fins lead into a lower chamber portion of the stuffer chamber. 
     
     
         8 . Device as claimed in  claim 1 , wherein the injector installation has a compressed-air supply which in the conveying duct produces a swirl flow. 
     
     
         9 . Device as claimed in  claim 8 , wherein the injector installation and the arrangement of the wall portions of the stuffer chamber are adapted to one another in such a manner that a rotational direction of the swirl flow counteracts an exhaust flow which exits through the air-exhaust openings. 
     
     
         10 . Device for crimping multifilament threads, the device comprising:
 an injector mechanism that includes a conveying duct having a thread inlet, and   a stuffing mechanism that includes a stuffer chamber having a chamber wall,   wherein the conveying duct of the injector mechanism opens into the stuffer chamber of the stuffing mechanism,   wherein the stuffer chamber in an upper chamber portion, between a plurality of wall portions of the chamber wall, has a plurality of slot-shaped air-exhaust openings, and   wherein the wall portions of the chamber wall, to configure the air-exhaust openings, each have one flow edge which is aligned so as to be tangential to a chamber circle.