Winder

Abstract

The invention relates to a winder for winding a thread or yarn to a winded package comprising at least one spindle and a pressure roller. The distance of the pressure roller from the spindle is dependent on the movement of the spindle or the pressure roller along a degree of freedom. The pressure roller is pressed against the outer circumference of the winded package. The spindle or the pressure roller is connected to a drive unit for rotating the same. The thread is supplied to the winded package in a contact area between the pressure roller and the winded package. An actuator is linked with the pressure roller or the spindle such that a force produced by said actuator influences the contact force between the pressure roller and the winded package. The actuator produces a constant force (F N ). At least a component (F FHG ) of the force (F N ) of the actuator is directed along a translational degree of freedom. The relation between the component (F FHG ) and the force (F N ) depends on the distance between the spindle and the pressure roller. The actuator influences a normal force (F N ) in a hinged pillar. The hinged pillar is inclined with an angle α in respect of the translational degree of freedom. The angle α depends on the distance of the spindle from the pressure roller.

1 . Winder for winding a thread or yarn to a winded package comprising
 a) at least one spindle,   b) a pressure roller, the distance of said pressure roller from said spindle being dependent on the movement of one element selected from the group consisting of said spindle and said pressure roller along a degree of freedom, said pressure roller being pressed against the outer circumference of said winded package, wherein one element selected from the group consisting of said spindle and said pressure roller being connected to a drive unit for rotating said selected element,   c) wherein said thread or yarn is supplied to said winded package in a contact area between said pressure roller and said winded package,   d) at least one actuator, said actuator being linked with one element selected from the group consisting of said pressure roller and said spindle such that a force produced by said actuator influences the contact force between said pressure roller and said winded package, wherein   e) said actuator is designed, arranged such that it produces a constant force (F N ) and   f) at least a component (F FHG ) of said force (F N ) of said actuator is directed along said degree of freedom and the relation between said component (F FHG ) of said force (F N ) which is directed along said degree of freedom and said force (F N ) of said actuator is dependent on said distance between said spindle and said pressure roller and   g) wherein said degree of freedom is a translational degree of freedom and   h) said actuator influences a normal force (F N ) in a hinged pillar, wherein said hinged pillar is inclined with an angle α in respect of said translational degree of freedom, said angle α being dependent on said distance of said spindle from said pressure roller.   
   
   
       2 . Winder of  claim 1 , wherein said actuator is a pressure activated piston-cylinder-unit. 
   
   
       3 . Winder of  claim 1 , wherein the location of at least one hinged linking point of said hinged pillar is designed and arranged to be changed. 
   
   
       4 . Winder of  claim 2 , wherein the location of at least one hinged linking point of said hinged pillar is designed and arranged to be changed. 
   
   
       5 . Winder of  claim 2 , wherein said actuator is a pneumatically activated piston-cylinder-unit. 
   
   
       6 . Winder of  claim 2 , wherein said actuator is controlled by a control unit, wherein said control unit is configured for controlling said actuator for producing a constant force. 
   
   
       7 . Winder of  claim 5 , wherein said pneumatically activated piston-cylinder-unit is pressurized via a control valve providing a constant pressure for said piston-cylinder-unit.