Method for winding up a thread
AssigneeBarmag AG
InventorKlaus Bartkowiak
Life of this patent
Estimating the term…
Abstract
A method and apparatus for winding a continuously advancing yarn to a package formed on a tubular core, wherein a traversing yarn guide reciprocates the yarn within a traverse stroke and deposits it on the package at an angle of crossing. For its reversal at the ends of the traverse stroke, the traversing yarn guide is decelerated within each reversal range by a finite deceleration from a guiding speed and is again accelerated to the guiding speed by a finite acceleration. The acceleration and deceleration of the traversing yarn guide are controlled in such a manner that the reversal ranges of the traverse strokes become greater in length as the diameter of the package increases.
Claims15
A method of winding a continuously advancing textile yarn into a core supported package, comprising the steps of
- guiding the advancing yarn onto a rotating core by a traversing yarn guide which moves within a traverse stroke to form a yarn package of increasing diameter, and so that during each traverse stroke the traversing yarn guide is accelerated to the guiding speed within a reversal range at one end of the traverse stroke, and decelerated from the guiding speed within a second reversal range at the opposite end of the traverse stroke,
- determining a particular length of the reversal ranges of the traverse strokes, which is necessary to provide a defined buildup of the package edges, wherein said particular length becomes greater in length as the diameter of the package increases, and
- controlling the acceleration and the deceleration of the yarn guide according to said particular length of the reversal ranges.
A method of winding a continuously advancing textile yarn into a core supported package, comprising the steps of
- guiding the advancing yarn onto a rotating core by a traversing yarn guide which moves within a traverse stroke to form a yarn package, and so that during each traverse stroke the traversing yarn guide is accelerated to a guiding speed within a reversal range at one end of the traverse stroke, and decelerated from the guiding speed within a second reversal range at the opposite end of the traverse stroke,
- continuously determining the package diameter and continuously determining a minimum length of the reversal ranges which ensures a stable yarn layer on the package surface for the then actual package diameter, and
- controlling the acceleration and the deceleration of the yarn guide during each traverse stroke to provide the determined minimum lengths of the reversal ranges.
An apparatus for winding a continuously advancing textile yarn into a core supported package comprising
- means for rotating the core to wind the yarn thereabout at a substantially constant rate,
- a yarn guide moveable axially with respect to the core for guiding the advancing yarn onto the core, and
- a drive for traversing the yarn guide over the package length, with the drive being controllable in speed and in acceleration by a controller which is connected to a control unit that continuously determines during the winding cycle for the then actual package diameter a minimum length of the reversal range, and generates therefrom control signals for controlling the acceleration and deceleration of the traversing yarn guide.
Dependencies are inferred from the claim text.