Method for false twisting filament yarn and a false twisting nozzle consisting of several components

Abstract

The invention relates to false twist nozzles by means of which one or more threads are impinged upon with an intensive twisting flow. At least one part of the conventional mechanic false twist producing devices can be replaced by optimising the air channels by means of a powerful twisting flow. A twist insertion plate is the new central element. A false twist nozzle is provided with at least one plate as the twist insertion plate having a continuous yarn channel component and a tangential channel and at least one element having an air supply device that extends in parallel in relation to the axis of the yarn channel, corresponds to the twist insertion plate and flows into the acceleration channel. The inventive solution enables a plurality of embodiments for a single thread or yarn sheet treatment. S and Z twist can be freely combined. The false twist nozzles can be used as subassemblies block by block or individually.

1 . Method for false twisting of filament yarn, where the filament yarn is transported through the continuous yarn channel of a false twist nozzle that is free on the entry side and the exit side, characterized in that 
 the compressed air is guided in the false twist nozzle in the direction and/or along the yarn transport path and then tangentially into the yarn channel so that a twist flow in the yarn channel generates the false twist on the freely passing-through filament yarn and that the false twist effect can be fixed by to a preceding heat treatment, and a crimp quality of the yarn can be pulled off.    
     
     
         2 . Method in accordance with  claim 1 , characterized in that 
 compressed air with a mean pressure range of preferably 2 to 14 bar is used.    
     
     
         3 . Method in accordance with  claim 1 , characterized in that 
 compressed air with 2 to 22 bar is used.    
     
     
         4 . Method in accordance with  claim 1 , characterized in that 
 compressed air with 14 to 40 bar is used.    
     
     
         5 . Method in accordance with one of the  claims 1  to  4 , characterized in that 
 the false twist as well as the immediate upstream thermal fixing takes place between two delivery devices LW 1  and LW 2 .  
 
     
     
         6 . Method in accordance with one of the  claims 1  to  5 , characterized in that the false twist nozzle can be displaced parallel to the direction of yarn transport and/or relative to its fastening location, whereby the displacement compulsorily turns the compressed air supply on or off.  
     
     
         7 . Method in accordance with one of the  claims 1  to  6 , characterized in that 
 two or more false twist nozzles or twist insert plates are switched parallel for a corresponding number of yarn runs and a S-twist or Z-twist is generated at the individual yarn runs by a continuous air supply.  
 
     
     
         8 . Method in accordance with one of the  claims 1  to  6 , characterized in that 
 two or three false twist nozzles are switched successively for a yarn run to generate a Z-twist or a S-twist on the same filament yarn.  
 
     
     
         9 . Method in accordance with one of the  claims 1  to  6 , characterized in that 
 at least one each S- and one Z-false twist nozzle are switched successively for a yarn run with alternating compressed air supply to generate in timely succession either a Z- or an S-twist on the same yarn.  
 
     
     
         10 . Method in accordance with one of the  claims 1  to  6 , characterized in that 
 two or three false twist nozzles or twist insert plates for a yarn run are switched successively and a controlled S- and/or Z-twist is generated in the second- or millisecond range by alternating the air supply.  
 
     
     
         11 . Multi-component false twist nozzle to generate a false twist textured filament yarn ( 10 ) having a continuous yarn channel ( 3 ) that is free on the entry side and on the exit side as well as an insert with tangential compressed air entry into the yarn channel ( 3 ), characterized in that 
 it has at least one twist insert plate ( 1 ,  1 ′,  1   x ) with a compressed air boring that runs in the direction of the yarn channel axis and a continuous yarn channel element ( 3 ′), as well as a tangential channel that runs from the compressed air boring into the yarn channel element, and at least one more element ( 7 ) having at least one each yarn channel element and/or a compressed air boring that corresponds with the twist insert plate ( 1 ,  1 ′, l x ).    
     
     
         12 . Multi-component false twist nozzle in accordance with  claim 11 , characterized in that 
 the twist insert plate ( 1 ,  1 ′,  1   x ) has two or more channel break-throughs for the tangential channel on the one hand as well as for the yarn channel ( 3 ) on the other hand, which are connected to the tangential channel to generate the twist flow, with said tangential channel being developed as a short air acceleration channel ( 5 ) for the case of two or a plurality of parallel yarn channels ( 3 ) in the type of a repeatedly used function pattern.    
     
     
         13 . Multi-component false twist nozzle in accordance with one of the claims  11  or  12 , characterized in that 
 the tangential channel ( 5 ) is developed to narrow from the compressed air boring in the direction of the yarn channel ( 3 ) and/or widens at the exit end (C) in the entry area (A) into the yarn channel ( 3 ), whereby the acceleration channel ( 5 ) continuously has an approximately rectangular cross-section.  
 
     
     
         14 . Multi-component false twist nozzle in accordance with one of the  claims 11  to  13 , characterized in that 
 the yarn channel as well as the compressed air boring are developed as a cylinder and the tangential channel ( 5 ) connects the two across the entire plate thickness and they preferably have, in the sense of a stamped form, a uniform form across the entire plate thickness.  
 
     
     
         15 . Multi-component false twist nozzle in accordance with one of the  claims 11  to  14 , characterized in that 
 the twist insert plates ( 1 ,  1 ′, l x ) with respect to additional insert plates ( 14 ) are produced of material with increased wear-and-tear resistance, especially ceramic material.  
 
     
     
         16 . Multi-component false twist nozzle in accordance with one of the  claims 11  to  15 , characterized in that 
 the twist insert plates ( 1 ,  1 ′,  1   x ) are developed divided and preferably have mutual anchoring locations ( 21 ), such that the precision of the flow-effective parts is compulsorily guaranteed in assembled condition.  
 
     
     
         17 . Multi-component false twist nozzle in accordance with one of the  claims 11  to  16 , characterized in that 
 it is developed as a kit with at least one element as support block ( 7 ,  7 ′) with the air supply ( 4 ,  4 ′) as well as a connection for a compressed air connection ( 9 ).  
 
     
     
         18 . Multi-component false twist nozzle in accordance with one of the  claims 11  to  17 , characterized in that 
 it has additional elements ( 20 ) that are developed as insert plates without air acceleration channel, but have at least two channel break-throughs ( 3 ,  4 ) for the air supply ( 4 ) and the yarn channel ( 3 ), whereby the corresponding channel breakthroughs ( 3 ,  4 ) form a uniform flow channel in assembled condition.  
 
     
     
         19 . Multi-component false twist nozzle in accordance with one of the  claims 11  to  18 , characterized in that 
 a twist insert plate ( 1 ,  1 ′,  1   x ) has two or more yarn channels, each with its own air supply, in parallel arrangement.  
 
     
     
         20 . Multi-component false twist nozzle in accordance with  claim 19 , characterized in that 
 a multiple of yarn channels ( 3 ) is arranged on a twist insert plate ( 30 ,  31 ) with the smallest possible division, preferably on a common center line (FIGS.  7  to  9 ).    
     
     
         21 . Multi-component false twist nozzle in accordance with  claim 19  or  20 , characterized in that 
 a twist insert plate ( 30 ,  31 ) has a separation location for two or more parts for a multiple of yarn channels in the area of the channel breakthroughs (FIG. 5 b ).  
 
     
     
         22 . Multi-component false twist nozzle in accordance with one of the  claims 11  to  21 , characterized in that 
 it has at least one twist insert plate ( 1 ,  1   x ) for S-twist and at least one twist insert plate ( 1 ′,  1   x ) for Z-twist, each with its own air supply, preferably with switchable air supply (FIG. 2).  
 
     
     
         23 . Multi-component false twist nozzle in accordance with one of the  claims 11  to  22 , characterized in that 
 it has insert distance plates (EDis) to select the distance, at least between two twist impact spots (D) (FIG. 5 c ).  
 
     
     
         24 . Multi-component false twist nozzle in accordance with one of the  claims 1  to  23 , characterized in that 
 one or a plurality of air twist nozzles are arranged displaceably relative to a compressed air distributor in such a way, that the compressed air supply can be turned on or off by the displacement.  
 
     
     
         25 . Multi-component false twist nozzle in accordance with  claim 24 , characterized in that 
 the air twist nozzles are displaceably arranged in blocks on one pressure distributor.    
     
     
         26 . Multi-component false twist nozzle in accordance with one of the  claims 1  to  25 , characterized in that 
 an air filter is arranged between the compressed air distributor and/or the compressed air supply and the air twist nozzles.