Method and apparatus for spinning and texturing a multifilament composite yarn

Abstract

A method and an apparatus for spinning and texturing a multifilament composite yarn. The composite yarn is formed from a plurality of yarn components, which are spun, cooled, drawn, and textured in parallel relationship. To obtain physical properties that are adapted to the quality characteristics of the yarn components, the invention provides for drawing at least one of the yarn components separately and independently of the other yarn components before texturing. To this end, a plurality to separate feed roll systems are provided, with at least one of the feed roll systems being associated to the one of the yarn components, and with the one yarn component being drawn by the feed roll system separately and independently of the other yarn components.

1 . A method of spinning and texturing a multifilament composite yarn which is composed of a plurality of individual yarn components, comprising the steps of 
 melt spinning a plurality of individual multifilament yarn components so as to advance parallel to each other, while cooling and drawing the individual yarn components, and including drawing at least one of the individual yarn components separately and independently from the other individual yarn components, then    texturing the individual yarn components separately or jointly,    gathering together the individual yarn components to form a composite yarn, and    winding the composite yarn into a package.    
   
   
       2 . The method of  claim 1 , wherein the melt spinning step includes withdrawing the yarn components from respective spinnerets, and wherein the step of separately and independently drawing at least one of the yarn components includes withdrawing the at least one of the yarn components at a withdrawal speed which is different from the withdrawal speeds of the other individual yarn components.  
   
   
       3 . The method of  claim 1  wherein a plurality of feed roll systems are associated with each of the individual yarn components by which the individual yarn components are separately advanced for the purpose of being drawn.  
   
   
       4 . The method of  claim 1 , wherein before being drawn, the individual yarn components are separately entangled by means of a pressurized fluid.  
   
   
       5 . The method of  claim 1 , wherein after having been drawn, the individual yarn components are each separately compressed to a yarn plug in separate stuffer box chambers for the purpose of being textured.  
   
   
       6 . The method of  claim 1 , wherein after having been drawn, the individual yarn components are jointly compressed to a yarn plug in a stuffer box chamber for the purpose of being textured.  
   
   
       7 . The method of  claim 1 , wherein the composite yarn is formed by entangling or by texturing the individual yarn components.  
   
   
       8 . An apparatus for spinning and texturing a multifilament component yarn, comprising 
 a melt spinning device for melt spinning a plurality of individual multifilament yarn components,    a withdrawal system for withdrawing and drawing the individual yarn components,    a texturing device for texturing the individual yarn components,    a combining device for gathering the individual yarn components to form a composite yarn,    a take-up device for winding the composite yarn into a package,    wherein the withdrawal system comprises a plurality of separate feed roll systems, with at least one of the feed roll systems being associated to one of the yarn components so that the one yarn component is drawn separately and independently of the other individual yarn components.    
   
   
       9 . The apparatus of  claim 8 , wherein the at least one feed roll system is constructed for separate operation and control.  
   
   
       10 . The apparatus of  claim 8  wherein the feed roll systems are associated to the individual yarn components such that each of the individual yarn components is withdrawn and drawn independently of adjacent individual yarn components.  
   
   
       11 . The apparatus of  claim 10 , wherein the feed roll systems are constructed to be operated and controlled individually or in groups.  
   
   
       12 . The apparatus of  claim 8  wherein the texturing device comprises a feed nozzle and a stuffer box chamber cooperating with the feed nozzle.  
   
   
       13 . The apparatus of  claim 12 , wherein downstream of the stuffer box chamber a cooling unit extends, by which a yarn plug emerging from the stuffer box chamber can be cooled.  
   
   
       14 . The apparatus of  claim 8 , wherein the combining device is formed by an entanglement unit, in which the individual yarn components are entangled with one another by means of a pressurized fluid.  
   
   
       15 . A method for spinning and texturing a plurality of yarns, comprising the steps of melt spinning parallel yarns from a polymer melt and then cooling and drawing the yarns, and wherein the yarns are then separately textured and wound to a package, and wherein during the drawing step the yarns are drawn separately and independently of one another by a plurality of feed roll systems associated with the yarns, with the feed roll systems being constructed to be operated and controlled individually or in groups.