Method and device for operating a winding device of a textile machine producing cross-wound bobbins

Abstract

A method and device for producing cross-wound textile bobbins using a creel for holding a cross-wound bobbin, a bobbin drive roller operated by a single drive to rotate the bobbin and a thread traversing mechanism driven by a single motor. At a predetermined bobbin diameter or a predetermined thread length, a thread guide of the traversing mechanism is positioned to adjust a thread end reserve for an adjustable time span. While the thread end reserve ( 10 ) is being produced, a thread storage suction nozzle ( 60 ) particular to the winding head acts on the thread ( 7 ) running onto the bobbin ( 8 ) to intermediately store excess thread length being produced during the winding of the thread end reserve ( 10 ) and to insure a minimum thread tension to reliably fix the thread end reserve ( 10 ) on the bobbin body or the cross-wound bobbin tube.

1 . Method for operating a winding device of a textile machine producing cross-wound bobbins, which has a creel for the freely rotatable holding of a cross-wound bobbin, a bobbin drive roller, which can be driven by a single drive, for rotating the cross-wound bobbin, and a thread traversing mechanism which can be driven by a single motor and activated in a defined manner, wherein on reaching a predeterminable cross-wound bobbin diameter or a predeterminable thread length, the thread guide of the thread traversing mechanism, to produce a thread end reserve for an adjustable time span, is either positioned outside the winding region of the cross-wound bobbin or inside the winding region of the cross-wound bobbin, characterised in that while the thread end reserve ( 10 ) is being produced, a thread storage nozzle ( 60 ) particular to the winding head and which can be acted upon with negative pressure is connected and acts on the thread ( 7 ) running onto the cross-wound bobbin ( 8 ) in such a way that excess thread length being produced during the winding of the thread end reserve ( 10 ) is intermediately stored and a minimum thread tension is thereby ensured that is necessary to reliably fix the thread end reserve ( 10 ) on the bobbin body or the cross-wound bobbin tube. 
   
   
       2 . Method according to  claim 1 , characterised in that the thread ( 7 ), while the thread reserve ( 10 ) is being produced, is firstly displaced beyond one of the bobbin flanks ( 35 ,  35 A) of the cross-wound bobbin ( 8 ) by the thread guide ( 40 ) of the thread traversing mechanism ( 18 ) and then fixed in parallel windings ( 32 ) on the bobbin surface ( 34 ) of the cross-wound bobbin ( 8 ). 
   
   
       3 . Method according to  claim 2 , characterised in that the thread guide ( 40 ), viewed from the front of the workstation ( 2 ), briefly displaces the thread ( 7 ) beyond the left bobbin flank ( 35 ) of the cross-wound bobbin ( 8 ). 
   
   
       4 . Method according to  claim 1 , characterised in that the thread ( 7 ) is fixed by a number of parallel windings ( 32 ) depending on the diameter of the cross-wound bobbin ( 8 ) on the bobbin surface ( 34 ) of the cross-wound bobbin ( 8 ). 
   
   
       5 . Winding device of a textile machine producing cross-wound bobbins for carrying out the method according to  claim 1 , comprising a creel for the freely rotatable holding of a cross-wound bobbin, a bobbin drive roller which can be driven by a single drive for rotating the cross-wound bobbin, and a thread traversing mechanism which can be driven by a single motor and activated in a defined manner, characterised in that each of the numerous workstations ( 2 ) of the open end spinning machine ( 1 ) is equipped with a thread storage nozzle ( 60 ) which can be acted on by negative pressure and can be connected in a defined manner, the mouth of which thread storage nozzle is arranged in the region of the running path of the thread ( 7 ) running onto the cross-wound bobbin ( 8 ).