Spinning position, air spinning machine and method for producing a yarn

Abstract

A spinning position for producing a yarn from a fed fiber band, having an air spinning nozzle with an inlet opening for the fed fiber band and an outlet area with an outlet opening for the spun yarn is provided. In order to provide a spinning position, an air spinning machine and a method which allow for the yarn surface finish to be modified advantageously without the yarn properties deteriorating at the same time, while also avoiding expensive and complex modifications to the spinning position, there is provision for a navel to be arranged in the outlet area behind the outlet opening for modifying the surface finish of the spun yarn.

What is claimed is: 
     
         1 . A spinning position for producing a yarn from a fed fiber band, with an air spinning nozzle with an inlet opening for the fed fiber band and an outlet area with an outlet opening for the air-spun yarn,
 characterized in that   a navel is arranged in the outlet area downstream of the outlet opening in the yarn take-off direction for modifying the surface finish of the spun yarn.   
     
     
         2 . The spinning position according to  claim 1 , characterized in that the navel has a nozzle opening for all-around take-up of the air-spun yarn. 
     
     
         3 . The spinning position according to  claim 1 , characterized in that the navel has a structured nozzle surface in the area of the nozzle opening for mechanical interaction with the surface of the yarn to be modified. 
     
     
         4 . The spinning position according to  claim 1 , characterized in that structure elements protruding from the nozzle surface are arranged in the area of the nozzle opening for intensified mechanical interaction with the yarn surface to be modified. 
     
     
         5 . The spinning position according to  claim 1 , characterized in that the structure elements protruding from the nozzle surface are formed as a spiral, rings, crosses, notches, grooves, squares, circles, dots, other elevations, or a combination. 
     
     
         6 . The spinning position according to  claim 1 , characterized in that several zones of protruding structure elements differing from one another are arranged on the nozzle surface, each of the zones extending over the entire circumference of the nozzle surface and/or the zones being arranged one behind the other in the nozzle opening. 
     
     
         7 . The spinning position according to  claim 1 , characterized in that the nozzle opening is divided along the central longitudinal axis into at least two zones, the first zone comprising a first shape of the protruding structure elements and/or a constant cross-section of the nozzle opening and the second zone having a different shape of the protruding structure elements and/or a conically widening cross-section of the nozzle opening. 
     
     
         8 . The spinning position according to  claim 1 , characterized in that the navel is fixed so as to be rotatable about the central longitudinal axis of the nozzle opening. 
     
     
         9 . An air spinning machine with at least one spinning position according to  claim 1  for producing a yarn from a fed fiber band. 
     
     
         10 . A method for producing a yarn with a modified surface finish, comprising:
 air spinning of a yarn from a fiber band by an air spinning nozzle, and   guiding of the air-spun yarn through a navel for modifying the yarn surface as the air-spun yarn is taken from the air spinning nozzle.   
     
     
         11 . A method of using a navel in the outlet area behind an outlet opening of an air spinning nozzle of a spinning position according to  claim 1  for modifying the surface finish of an air-spun yarn.