Method and installation for producing a twisted synthetic yarn

Abstract

A method and an installation for producing a twisted synthetic yarn, comprising a spin-drawing installation configured to produce continuous filaments from a liquid plastics material or granular material by at least one spinneret and then to produce at least one yarn from at least two continuous filaments. A downstream treatment apparatus treats the at least one yarn which is transferred, without interruption, from the treatment apparatus to a downstream twisting/cabling apparatus via a collection and transport apparatus in a continuous process from the spin-drawing installation to the twisting/cabling apparatus. The collection and transport apparatus is configured to compensate for a difference in a production speed between the spin-drawing installation and the twisting/cabling apparatus.

1 . A method for producing a twisted or cabled synthetic yarn, comprising the steps of:
 producing with at least one spinneret in a spin-drawing installation continuous filaments from a liquid plastics material or granular material and then producing at least one yarn from at least two continuous filaments;   inputting the at least one yarn into a treatment apparatus;   transferring the yarn from the treatment apparatus, without interruption, to a twisting/cabling apparatus, via a collection and transport apparatus; and   buffering a predetermined length of the at least one yarn in the collection and transport apparatus in order to compensate for a production difference between the spin-drawing installation and the twisting/cabling apparatus.   
     
     
         2 . (canceled) 
     
     
         3 . The method according to  claim 1 , wherein the transferring step includes transferring at least two yarns by the collection and transport apparatus from the spin-drawing installation to the twisting/cabling apparatus. 
     
     
         4 . The method according to  claim 1 , wherein the transferring step includes transferring at least two yarns from the treatment apparatus to a delivery apparatus for relaxing and transferring the at least two yarns in a form of a yarn or a plurality of yarns on the collection and transport apparatus to the twisting/cable apparatus. 
     
     
         5 . The method according to  claim 1 , including treating the at least one yarn in an atmosphere of hot steam or conditioned gas while the at least one yarn is transferred from the spin-drawing installation to the twisting/cabling apparatus. 
     
     
         6 . The method according to  claim 1 , including guiding the at least one yarn out of the spin-drawing installation at a speed of from 10 m/min to 600 m/min. 
     
     
         7 . The method according to  claim 1 , including inputting the at least one yarn into the twisting/cabling apparatus at a speed of from 10 m/min to 500 m/min. 
     
     
         8 . The method according to  claim 1 , further including the at least one yarn guided inside the collection and transport apparatus by one of a temperature-controlled drum, cylinders or rows of deflection rollers. 
     
     
         9 . The method according to  claim 1 , wherein the delivering step includes relaxing the at least one yarn by a delivery apparatus including at least one transport roller assisted by steam of or conditioned gas. 
     
     
         10 . The method according to  claim 4 , including using a controller for adapting a production speed of each of the delivery apparatus, and the twisting/cabling apparatus to a current buffer capacity of the collection and transport apparatus, and vice versa. 
     
     
         11 . An installation for producing a twisted or cabled synthetic yarn, comprising:
 a spin-drawing installation including at least one spinneret configured to produce continuous filaments from a liquid plastics material or granular material by the at least one spinneret and then to produce at least one yarn from at least two continuous filaments;   a treatment apparatus downstream of the spin-drawing installation for treating the at least one yarn;   a collection and transport apparatus; and   a twisting/cabling apparatus downstream of the collection and transport apparatus;   wherein the installation is configured to transfer the at least one yarn without interruption from the spin-drawing installation to the twisting/cabling apparatus; and   wherein the collection and transport apparatus is configured to compensate for a difference in a production speed between the spin-drawing installation and the twisting/cabling apparatus.   
     
     
         12 . The installation according to  claim 11 , further including a delivery apparatus to deliver the at least one yarn from the treatment apparatus. 
     
     
         13 . (canceled) 
     
     
         14 . The installation according to  claim 11 , wherein the collection and transport apparatus comprises a revolving belt. 
     
     
         15 . The installation according to  claim 11 , wherein the collection and transport apparatus comprises a drum including a thread guide. 
     
     
         16 . The installation according to  claim 11 , wherein the collection and transport apparatus comprises adjustable cylinders to adjust a distance from one another. 
     
     
         17 . The installation according to  claim 11 , wherein the collection and transport apparatus comprises an adjustable buffer including two rows of deflection rollers with a distance between the rows that is adjustable. 
     
     
         18 . The installation according to  claim 11  further including a housing in which collection and transport apparatus is arranged and which is configured to be filled with hot steam or conditioned gas. 
     
     
         19 . The installation according to  claim 11 , further including a controller configured to adapt a production speed of the spin-drawing installation and of the twisting/cabling apparatus to a current buffer capacity of the collection and transport apparatus, or to reconcile a difference between a production speed of the spin-drawing installation and of the twisting/cabling apparatus. 
     
     
         20 . The installation according to  claim 19 , wherein the controller is part of a system as a whole consisting of the spin-drawing installation and of the collection and transport apparatus.