Machine for yarn cabling/twisting and continuous setting

Abstract

A machine comprising one or several processing stations, integrates in a combined and successive manner, according to a same work position: a spindle for twisting and/or cabling a yarn, thermosetting apparatus comprising a rotating heating godet, followed by an accumulator capable of cooling and relaxing the yarn in a totally free state, without tension, and a bobbin for winding the yarn, the bobbin being secured to yarn guiding and driving bodies.

1 . Machine for the continuous cabling/twisting and setting of yarns, comprising several treatment stations incorporating, in combination and in succession, within the same work position: 
 means ( 1 ) for twisting/cabling a yarn;    heat-setting means consisting of a heated rotary godet ( 2 ) followed by an accumulator ( 3 ) capable of cooling and relaxing the yarn in the completely free, tensionless state; and    means ( 4 ) for winding on or winding up the yarn ( 5 ),    the said means being subjected to means for driving and guiding the yarn.    
   
   
       2 . Machine according to  claim 1 , characterized in that, at the or each treatment station, the twisting/cabling means ( 1 ), heat-setting means ( 2 ) and winding-on means ( 4 ) are mounted in combination with devices for forwarding the yarn and arrangements of the, frame of the said machine, so as to delimit a small and compact space that incorporates the yarn wind-off means ( 6 ), along a yarn path of short length.  
   
   
       3 . Machine according to either of claims  1  and  2 , characterized in that the godet ( 2 ) has configurations capable of allowing the shrinkage of the yarn to be controlled.  
   
   
       4 . Machine according to  claim 3 , characterized in that the configurations of the godet consist of a longitudinal profile defining successive zones that extend over almost the entire length of the said godet, namely an initial crimp pick-up zone ( 2   a ), a residual shrinkage zone ( 2   b ) and a setting zone ( 2   c ).  
   
   
       5 . Machine according to  claim 4 , characterized inthat the initial crimp pick-up ( 2   a ) and residual shrinkage ( 2   b ) zones consist of conical bearing surfaces, while the setting zone ( 2   c ) consists of a cylindrical bearing surface.  
   
   
       6 . Machine according to  claim 5 , characterized in that the two conical bearing surfaces ( 2   a ) and ( 2   b ) have different cone angles, the residual shrinkage zone ( 2   b ) having a smaller angle than the initial crimp pick-up zone ( 2   a ).  
   
   
       7 . Machine according to  claim 3 , characterized in that the length of the setting zone ( 2   c ) is greater than the sum of the lengths of the two other zones ( 2   a ) and ( 2   b ).  
   
   
       8 . Machine according to  claim 4 , characterized in that the initial crimp, residual shrinkage and setting zones consist of a curved profile.  
   
   
       9 . Machine according to  claim 2 , characterized in that the heated godet ( 2 ) is subjected to means capable of allowing automatic reeving of the yarn.  
   
   
       10 . Machine according to  claim 2 , characterized in that the accumulator ( 3 ) consists of a hollow straight body placed approximately vertically, the end of which, considered on the output side, is frustoconical in order to create, within the said body, a buffer zone braking the output of the said yarn by preventing it from leaving directly.  
   
   
       11 . Machine according to  claim 10 , characterized in that, at the outlet of the accumulator ( 3 ), the yarn is subjected to the action of bars ( 8 ) capable of uncurling the yarn and giving it the tension needed for winding-on.  
   
   
       12 . Machine according to  claim 3 , characterized in that the accumulator ( 3 ) consists of a relaxation belt in which the yarn forms a reserve, the said belt being placed between the heat-setting godet ( 2 ) and the wind-up means ( 4 ), the wind-up speed being regulated so that the amount of accumulated yarn in reserve is maintained between two predetermined values, a minimum value and a maximum value.  
   
   
       13 . Machine according to  claim 7  or  8 , characterized in that the yarn ( 5 ) is deposited in the accumulator ( 3 ) through the effect of a relative movement between a guiding element and the accumulator itself.  
   
   
       14 . Machine according to  claim 13 , characterized in that the relative movement is created by a displacement of the yarn guiding element.  
   
   
       15 . Machine according to  claim 13 , characterized in that the relative movement is created by a displacement of the accumulator itself.  
   
   
       16 . Machine according to  claims 11  to  15 , characterized in that each treatment station comprises, in succession starting from the wind-off bobbin: 
 a yarn twisting and/or cabling spindle ( 1 );    a presser/deliverer member ( 7 ) limiting the tension of the yarn and setting a level of twist downstream;    the heated rotary godet ( 2 );    the cooling accumulator ( 3 );    the uncurling bars ( 8 ); and    the winding-on or wind-up bobbin ( 4 )