Spinning element of an air-jet spinning nozzle for an air-jet spinning machine

Abstract

A spinning element of an air-jet spinning nozzle for an air-jet spinning machine for producing a yarn from a sliver using an airflow. The spinning element of the air-jet spinning nozzle for the air-jet spinning machine and a corresponding air-jet spinning nozzle allows a particularly inexpensive, low-maintenance, and simple operation of an air-jet spinning machine without compromising the quality and strength of the air-jet spun yarn and without requiring frequent cleaning. This is achieved in that the spinning element has at least one fibre- and/or thread-guiding surface, an anti-adhesive coating being located on at least some sections of the fibre- and/or thread-guiding surface.

1 . A spinning element of an air-jet spinning nozzle for an air-jet spinning machine for producing a yarn from a fibre band by an air flow, with
 at least one fibre-guiding and/or thread-guiding surface, wherein   the at least one fibre-guiding and/or thread-guiding surface exhibits at least on portions a non-stick coating.   
     
     
         2 . The spinning element according to  claim 1 , wherein the non-stick coating has a lower coefficient of friction than underlying material of the spinning element. 
     
     
         3 . The spinning element according to  claim 1 , wherein a coefficient of friction of the at least one fibre-guiding and/or thread-guiding surface with the non-stick coating is less than 0.3. 
     
     
         4 . The spinning element according to  claim 1 , wherein the non-stick coating consists of polytetrafluoroethylene or a perfluoroalkoxy polymer or a tetrafluoroethylene-hexafluoropropylene copolymer. 
     
     
         5 . The spinning element according to  claim 1 , wherein the at least one fibre-guiding and/or thread-guiding surface is at least one surface portion of a spinning cone and/or of a needle and/or of a pair of tweezers of the air-jet spinning nozzle. 
     
     
         6 . The spinning element according to  claim 1 , wherein the spinning element is a spinning cone whose surface at least in a region of a tip thereof has at least 25% of a length of the spinning cone running in a yarn removal direction and at least 25% along a circumferential direction thereof has the non-stick coating wherein the spinning cone exhibits an inlet mouth to accept spun yarn into an extraction channel defining the yarn removal direction. 
     
     
         7 . The spinning element according to  claim 1 , wherein the at least one fibre-guiding and/or thread-guiding surface is a surface surrounding the yarn and/or the fibre band. 
     
     
         8 . The spinning element according to  claim 7 , wherein the surface surrounding the yarn and/or the fibre band is an inner wall of the air-jet spinning nozzle. 
     
     
         9 . The spinning element according to  claim 1 , wherein the non-stick coating exhibits a layer thickness of between 10 μm and 200 μm. 
     
     
         10 . The spinning element according to  claim 1 , wherein the non-stick coating exhibits an antistatic surface. 
     
     
         11 . An air-jet spinning nozzle for an air-jet spinning machine, with at least one spinning element arranged inside the air-jet spinning nozzle according to  claim 1 . 
     
     
         12 . The spinning element according to  claim 6 , wherein the surface of the spinning cone is a fibre-guiding and/or thread-guiding surface. 
     
     
         13 . The spinning element according to  claim 8 , wherein the inner wall is of a vortex chamber. 
     
     
         14 . An air-jet spinning machine comprising:
 an air-jet spinning nozzle having a spinning element for producing a yarn from a fibre band by an air flow;   the spinning element including at least one fibre-guiding and/or thread-guiding surface; and   a non-stick coating on at least a portion of the at least one fibre-guiding and/or thread-guiding surface.   
     
     
         15 . The air-jet spinning machine according to  claim 14 , wherein the at least one fibre-guiding and/or thread-guiding surface is at least one surface portion of at least one of a spinning cone, a needle, a pair of tweezers of the air-jet spinning nozzle. 
     
     
         16 . The air-jet spinning machine according to  claim 14 , wherein the spinning element comprises a spinning cone whose surface at least in a region of a tip thereof has at least 25% of a length of the spinning cone running in a yarn removal direction and at least 25% along a circumferential direction thereof has the non-stick coating, and wherein the spinning cone includes an inlet mouth to accept spun yarn into an extraction channel defining the yarn removal direction. 
     
     
         17 . The air-jet spinning machine according to  claim 14 , wherein the at least one fibre-guiding and/or thread-guiding surface is a surface surrounding the yarn and/or the fibre band. 
     
     
         18 . The air-jet spinning machine according to  claim 17 , wherein the surface surrounding the yarn and/or the fibre band is an inner wall of the air-jet spinning nozzle. 
     
     
         19 . The air-jet spinning machine according to  claim 14 , wherein the non-stick coating has a thickness of between 10 μm and 200 μm. 
     
     
         20 . The air-jet spinning machine according to  claim 1 , wherein the non-stick coating is antistatic.