Abstract:
The invention relates to a method for operating a machine, especially a winder, that winds threads. A thread is alternately guided to-and-fro between two change-over points within a traversing stroke and crosswise in relation to the drawing-off direction of the thread by means of a thread guide of a traversing device for being laid onto a rotating bobbin. The invention also relates to devices for carrying out the methods. According to the invention, an end point of the change-over of the thread guide is fixed at a change-over point. The traversing stroke is corrected, preferably shortened or prolonged, during a following stroke and according to the position of the end point. In an alternative embodiment, the actuation of the thread guide or the traversing device is controlled according to a predetermined winding ratio and a bobbin speed in such a way that the winding ratio is maintained when the bobbin speed is changed or not.
Abstract:
A method of winding bulked continuous filament yarn is disclosed, which enables superior yarn package formation, including higher density packages with excellent shape and yarn takeoff characteristics. The method uses unique helix angles and winding profiles in a non-adjacent and adjacent yarn pattern, achieved by a unique winding control strategy that constantly monitors spindle speed, desired wind ratio, traverse cam speed, and surface speed.
Abstract:
A method of winding an elastomeric yam, such as spandex, onto a spool includes the steps of providing a spool; providing an elastomeric yarn; rotating the spool at a speed to define a spool rotation speed; moving the yarn traversely with respect to the spool in an alternating to and fro manner to define a traverse frequency; winding the yarn onto the spool; controlling the ratio of the spool rotation speed to the traverse frequency to define a wind ratio during the winding of the yarn onto the spool; and decreasing the traverse speed as the yarn is wound onto the spool in an inverse proportion to an amount of yarn that has been wound. The winding of the yarn onto the spool forms a yarn cake on the spool. The traverse speed may be decreased in inverse proportion to a diameter of the yarn cake. The method may further include the step of shifting the yarn by a pitch for each rotation of the spool.
Abstract:
A method of winding bulked continuous filament yarn is disclosed, which enables superior yarn package formation, including higher density packages with excellent shape and yarn takeoff characteristics. The method uses unique helix angles and winding profiles in a non-adjacent and adjacent yarn pattern, achieved by a unique winding control strategy that constantly monitors spindle speed, desired wind ratio, traverse cam speed, and surface speed.
Abstract:
Es ist ein Verfahren zum Wickeln eines Fadens (1) zu einer Kreuzspule (2) sowie eine Kreuzspule beschrieben. Zur Bestimmung einer Stirnflächenform an der Kreuzspule wird ein kontinuierlich zugeführter Faden mit innerhalb eines Changierhubes mit veränderbarer Länge hin- und hergeführt. Um insbesondere zu Einfärben der Kreuzspule eine gleichmäßige Farbdurchdringung zu erhalten, wir erfindungsgemäß der Changierhub zum Ende der Auf Wicklung derart gesteuert, dass zu beiden Stirnseiten eine Verrundung der Stirnfläche der Kreuzspule entsteht.
Abstract:
The invention relates to a method for operating a machine, especially a winder, that winds threads. A thread is alternately guided to-and-fro between two change-over points within a traversing stroke and crosswise in relation to the drawing-off direction of the thread by means of a thread guide of a traversing device for being laid onto a rotating bobbin. The invention also relates to devices for carrying out the methods. According to the invention, an end point of the change-over of the thread guide is fixed at a change-over point. The traversing stroke is corrected, preferably shortened or prolonged, during a following stroke and according to the position of the end point. In an alternative embodiment, the actuation of the thread guide or the traversing device is controlled according to a predetermined winding ratio and a bobbin speed in such a way that the winding ratio is maintained when the bobbin speed is changed or not.