Method and apparatus for winding a continuously advancing yarn
AssigneeBarmag AG
InventorsFriedhelm Lenz, Reinhard Lieber
Life of this patent
Estimating the term…
Abstract
A method and apparatus for winding a continuously advancing yarn, wherein the yarn is wound on a driven tube to a cross wound package. The yarn is reciprocated by means of a traversing yarn guide within a traverse stroke which is variable in its length within the package width of the cross wound package. During the winding cycle, the traverse stroke is varied between a maximum length at the beginning of the winding cycle and an end length at the end of the winding cycle by a predetermined stroke function in such a manner that in the course of the winding cycle, a certain length is associated to each traverse stroke, with the lengths of the traverse strokes being smaller than the respective wound package widths then being formed.
Claims19
A method of winding a continuously advancing yarn to form a cross wound package, comprising the steps of
- reciprocating the advancing yarn by means of a traversing yarn guide which defines a traverse stroke and so as to deposit the yarn on the package,
- controlling the traverse stroke of the traversing yarn guide within the package width so that at the beginning of the winding cycle the traverse stroke has a maximum predetermined length and at the end of the winding cycle the traverse stroke has a predetermined end length for defining a desired angle of slope of the end faces of the package, and
- wherein the length of the traverse stroke is varied as a function of a predetermined stroke function which associates in the course of the winding cycle a certain length to each traverse stroke, with the length of the traverse strokes within an intermediate range of the package diameter being less than the respectively final wound package widths.
An apparatus for winding a continuously advancing yarn to form a cross wound package, comprising
- a holder for rotatably mounting a tube on which an advancing yarn may be wound within a package width (B) to a cross wound package,
- a movable traversing yarn guide which is adapted for reciprocal movement along the tube by a traverse drive within a traverse stroke which is variable in its length, and
- a controller for controlling the traverse drive, with the controller connected to a sensor which measures the rotational speed of the tube and including a data storage for receiving at least one stroke function (F) and a winding speed (V), with the controller further comprising a computing unit for determining the instantaneous package diameter, and with the controller connected to the traverse drive of the traversing yarn guide to control the length of the traverse stroke, which is predetermined by the stroke function (F) and wherein the stroke function (F) is configured to coordinate the length of each traverse stroke so as to be smaller than the final wound package width then being formed, during at least an intermediate portion of the winding cycle.
Dependencies are inferred from the claim text.