Buffer method and system for alternating twist plied yarn

Abstract

The present invention relates to an improved system and method for the production of heatset yarns, in particular for the production of heatset alternating S/Z cabled yarns. The invention also relates to the product obtained according to the method, namely an improved heatset twist plied yarn.

1 . A system for manufacturing heatset twist plied yarns, comprising:
 at least one twist plying device configured to twist plying at least two incoming yarns;   at least one accumulation device configured to receive, accumulate and forward the twist plied yarns from the at least one twist plying device, the accumulation system configured to temporary accumulate the twist plied yarns; and   at least one heatsetting device configured to receive and heatset the twist plied yarns of the at least one accumulation device to manufacture at least one heatset twist plied yarn;   wherein at least one twist plying device is configured to operate uninterruptedly, the heatsetting device configured to operate intermittently and periods of operation of the heatsetting device being alternated with periods of stopping the heatsetting device, and whereby the accumulation device is configured to temporarily retain the accumulated twist plied yarns when stopping the heatsetting device.   
     
     
         2 . The system for manufacturing heatset twist plied yarns according to  claim 1 , wherein the twist plying device is configured to match the speed of manufacturing the twist plied yarns to the amount of accumulated yarn on the accumulation device. 
     
     
         3 . A system for manufacturing heatset twist plied yarns according to  claim 1 , wherein the at least one twist plying device is configured to automatically adjust the speed of manufacturing the twist plied yarns to whether or not the heatsetting device is operating. 
     
     
         4 . The system for manufacturing heatset twist plied yarns according to  claim 1 , wherein the speed of manufacturing the twist plied yarns is automatically reduced within a predetermined period of time after the heatsetting device stops operating, and preference whereby said speed remains reduced at least until the heatsetting device proceeds to operate. 
     
     
         5 . The system for manufacturing heatset twist plied yarns according to  claim 1 , wherein the speed of manufacturing the twist plied yarns is automatically reduced, taking into account an estimated length of time for the heatsetting to be stopped, to not exceed a predetermined maximum amount of accumulated twist plied yarn on the accumulation device. 
     
     
         6 . The system for manufacturing heatset twist plied yarns according to  claim 1 , wherein the incoming yarns concern incoming alternating S/Z twist plied yarns, and wherein the at least one twist plying device is suitable for manufacturing one or more alternating S/Z cabled yarns from the incoming alternating S/Z twist plied yarns. 
     
     
         7 . The system for manufacturing heatset twist plied yarns according to  claim 1 , comprising a control system configured to monitor the amount of accumulated twist plied yarn on the accumulation device, and configured to control the speed of the production of the twist plied yarn by the twist plying device on the basis of at least the amount of accumulated twist plied yarn and whether or not the heatsetting device is active. 
     
     
         8 . A method for manufacturing the heatset twist plied yarns, comprising:
 twist plying one or more groups of two or more yarns to produce one or more twist plied yarns;   receiving the one or more twist plied yarns by at least one accumulation device;   accumulating the one or more received twist plied yarns by the at least one accumulation device wherein the accumulation device is configured to temporary accumulate of the twist plied yarns;   passing the accumulated twist plied yarns from the at least one accumulation device to at least one heatsetting device;   heatsetting the twist plied yarns in the at least one heatsetting device for the manufacture of at least one heatset twist plied yarn;   wherein the step of twisting takes place continuously, while heatsetting occurs intermittently and periods of heatsetting are alternated with periods of stopping of the heatsetting, and wherein passing the accumulated twist plied yarns to the at least one heatsetting device is temporarily stopped when the heatsetting device is stopped.   
     
     
         9 . The method for manufacturing heatset twist plied yarns according to  claim 8 , wherein the speed of manufacturing the twist plied yarns is automatically adjusted to the amount of accumulated yarn on the accumulation device. 
     
     
         10 . The method for manufacturing heatset twist plied yarns according to  claim 8 , wherein the speed of manufacturing the twist plied yarns is automatically adjusted to whether or not heatsetting is interrupted. 
     
     
         11 . The method for manufacturing heatset twist plied yarns according to  claim 8 , wherein the speed of manufacturing the twist plied yarns is automatically reduced within a predetermined period of time after the step of heatsetting is discontinued, and preferably wherein said speed is reduced at least until heatsetting is no longer interrupted. 
     
     
         12 . The method for manufacturing heatset twist plied yarns according to  claim 8 , wherein the speed of manufacturing the twist plied yarns is automatically reduced taking into account an estimated length of time for which heatsetting is stopped, the speed being adjusted so as not to exceed a predetermined maximum amount of accumulated twist plied yarn by the accumulation device on the basis of said estimated length of time. 
     
     
         13 . The method for manufacturing heatset twist plied yarns according to  claim 8 , wherein the speed of twist plying one or more groups of two or more yarns for manufacturing one or more twist plied yarns is adjusted on the basis of at least one of the amount of accumulated twist plied yarn or if heatsetting of the twist plied yarns has taken place. 
     
     
         14 . The method for manufacturing a heatset twist plied yarn according to  claim 8 , wherein twist plying one or more groups of two or more yarns comprises alternating S/Z twist plied yarns or alternating S/Z cabled yarns or connected alternately S/Z twist plied yarns. 
     
     
         15 . Heatset twist plied yarn, preferably a heatset alternating S/Z twist plied yarn or a heatset alternating S/Z cabled yarn or a heatset connected alternating S/Z twist plied yarn, obtained by a method according to  claim 8 . 
     
     
         16 . Accumulation device for receiving, accumulating and transmitting incoming, preferably twist plied, yarns, comprising:
 a spool configured to receive yarns wound around it;   a yarn supply through which the incoming yarns are guided;   a yarn guide, which is connected to the yarn supply, which guides the yarns supplied by the yarn supply further to the spool, the yarn guide configured to rotate relative to the spool about the longitudinal axis of the spool;   a yarn exit for exiting the yarn wound around the spool;   a propagation system configured to move the yarn wound around the spool along the longitudinal axis of the spool in the direction of the yarn exit; and   one or more detection systems configured to determine a degree of filling of the spool with the yarns wound around it.   
     
     
         17 . Heatset system for receiving and heatsetting incoming, preferably twist plied, yarns, comprising:
 an accumulation device according to  claim 16 ; and   a heatsetting device configured to heatset yarns, the heatsetting device configured to receive exited yarns from the yarn exit of the accumulation device.