Method For The Pressure Regulation In A Weaving Machine And Weaving Machine With A Pressure Regulating System

Abstract

A method for the pressure regulation in a weaving machine ( 1 ) is presented, in particular in an air jet weaving machine having a pressure regulating system ( 10 ) and a weft insertion system for the insertion of a plurality of different weft threads ( 2, 2 ′). In the weft insertion system a thread store ( 2 a , 2 b , 2 a ′, 2 b ′) and a main nozzle ( 3, 3 ′) is provided for each different weft thread, with the main nozzle drawing off the respective weft thread from the thread store and accelerating it during the insertion. In addition, there is provided in the pressure regulating system, for a group of main nozzles together, a pressure regulator ( 20 ) with a pressure sensor ( 21 ), a multi-way valve ( 22 ) and a regulator ( 23 ) arranged separate from it, with the regulator being connected to the pressure sensor and to the multi-way valve, and the pressure regulator ( 20 ) is coupled for the insertion of a weft thread to the main nozzle ( 3, 3 ′) of the group corresponding to it.

1 . A method for the pressure regulation in a weaving machine ( 1 ), in particular an air jet weaving machine having a pressure regulating system ( 10 ) and a weft insertion system for the insertion of a plurality of different weft threads ( 2 ,  2 ′) in which a thread store ( 2   a ,  2   b ,  2   a ′,  2   b ′) and a main nozzle ( 3 ,  3 ′) is provided for each different weft thread, with the main nozzle drawing off and accelerating the respective weft thread from the thread store during the insertion, characterized in that a pressure regulator ( 20 ) with a pressure sensor ( 21 ), a multi-way valve ( 22 ) and a regulator ( 23 ) arranged separate from this is provided in the pressure regulating system ( 10 ) for a group of main nozzles together, with the regulator being connected to the pressure sensor and to the multi-way valve and in that the pressure regulator ( 20 ) is coupled for the insertion of a weft thread to the main nozzle ( 3 ,  3 ′) of the group corresponding to it. 
   
   
       2 . A method in accordance with  claim 1  wherein, in addition, one or more tandem nozzles ( 4 ,  4 ′) are provided in the weft insertion system for each different weft thread ( 2 ,  2 ′) and wherein a pressure regulator ( 20 ) having a pressure sensor ( 21 ), a multi-way valve ( 22 ) and a regulator ( 23 ) arranged separate from it is provided in the pressure regulating system ( 10 ) for a group of tandem nozzles together, with the regulator being connected to the pressure sensor and to the multi-way valve, and the pressure regulator is coupled for the insertion of a weft thread to the tandem nozzle or nozzles of the group corresponding to it. 
   
   
       3 . A method in accordance with  claim 1 , wherein a respective pressure regulator ( 20 ) having a pressure sensor ( 21 ), a multi-way valve ( 22 ) and a regulator ( 23 ) arranged separate from it is provided in the pressure regulating system for all main nozzles ( 3 ,  3 ′) together and/or for all tandem nozzles ( 4 ,  4 ′) together, with the regulator being connected to the pressure sensor and to the multi-way valve, and wherein the respective pressure regulator is coupled to the corresponding main nozzle and tandem nozzle or tandem nozzles for the insertion of a weft thread. 
   
   
       4 . A method in accordance with  claim 1 , wherein one or more weft sensors ( 13 ) and a regulating unit are additionally provided in the pressure regulating system with the regulating unit being connected to the weft thread sensors and the pressure regulator or regulators and wherein the insertion time and the speed of insertion of the different weft threads ( 2 ,  2 ′) is detected by means of the weft thread sensors and for each weft thread the pressure with which the main nozzle and/or tandem nozzle/tandem nozzles associated with the relevant weft thread are operated is set and/or regulated in dependence on the insertion time and/or the insertion speed detected. 
   
   
       5 . A weaving machine, in particular a jet weaving machine having a pressure regulating system and including a weft insertion system for the insertion of a plurality of different weft threads ( 2 ,  2 ′) which contains a thread store ( 2   a ,  2   b ,  2   a ′,  2   b ′) and a main nozzle ( 3 ,  3 ′) for each different weft thread, in order to draw off from the thread store and accelerate the respective weft thread during the insertion and which is connected to the pressure regulating system, characterized in that the pressure regulating system ( 10 ) contains a pressure regulator ( 20 ) with a pressure sensor ( 21 ), a multi-way valve ( 22 ) and a regulator ( 23 ) arranged separate from it for a group of main nozzles together, the regulator being connected to the pressure sensor and/or to the multi-way valve and in that the pressure regulator is able to be coupled to the individual main nozzles ( 3 ,  3 ′) of the group. 
   
   
       6 . A weaving machine in accordance with  claim 5 , wherein the weft insertion system additionally includes one or more tandem nozzles ( 4 ,  4 ′) for each different weft thread ( 2 ,  2 ′) and wherein the pressure regulating system contains a pressure regulator ( 20 ) with a pressure sensor ( 21 ), a multi-way valve ( 22 ) and a regulator ( 23 ) arranged separate from it for a group of tandem nozzles together, with the regulator being connected to the pressure sensor and to the multi-way valve and wherein the pressure regulator is able to be coupled for the insertion of a weft thread to the individual tandem nozzles of the group. 
   
   
       7 . A weaving machine in accordance with  claim 5 , wherein the pressure regulating system respectively contains for all main nozzles ( 3 ,  3 ′) together and/or for all tandem nozzles together a pressure regulator ( 20 ) with a pressure sensor ( 21 ), a multi-way valve ( 22 ) and a regulator ( 23 ) arranged separate from it, with the regulator being connected to the pressure sensor and to the multi-way valve and wherein the respective pressure regulator is able to be coupled to the individual main nozzles ( 3 ,  3 ′) and/or to the individual tandem nozzles ( 4 ,  4 ′). 
   
   
       8 . A weaving machine in accordance with  claim 5 , wherein the pressure regulating system additionally contains one or more weft thread sensors ( 13 ) for the detection of the insertion time and/or insertion speed of the various weft threads ( 2 ,  2 ′) and a regulating unit, with the regulating unit being connected to the weft thread sensors and to the pressure regulator or regulators in order to set and/or regulate for each weft thread the pressure which is applied to the corresponding main nozzle ( 3 ,  3 ′) and/or to the corresponding tandem nozzle ( 4 ,  4 ′) in dependence on the insertion time and/or the insertion speed detected. 
   
   
       9 . A weaving machine in accordance with  claim 5 , wherein the pressure regulating system additionally contains in each case for each main nozzle ( 3 ,  3 ′) and/or tandem nozzle ( 4 ,  4 ′) a valve ( 17 ,  17 ′) by which the relevant main nozzle or tandem nozzle can be coupled to the respective pressure regulator. 
   
   
       10 . A weaving machine in accordance with  claim 5 , wherein the pressure regulating system additionally contains a pressure line ( 11 ) and a pressure tank ( 18 ) connected to it to which the pressure regulator or regulators ( 20 ) are connected.