Apparatus and method for spinning and winding multifilament yarns
AssigneeBarmag AG
InventorsJorg Spahlinger, Johannes Bruske
Life of this patent
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Abstract
An apparatus and method for melt spinning a plurality of downwardly advancing multifilament polymeric yarns, and winding the advancing yarns into respective packages. Each of the advancing yarns is brought into contact with a separate yarn delivery mechanism which acts to control the yarn tension before the yarn is wound into a package. Thus, the yarn tension of all of the yarns can be made substantially the same when they are wound into packages, which permits all of the packages to have the same winding structure and the same packing density.
Claims29
A method of spinning a plurality of polymeric yarns and winding the same into respective yarn packages, comprising the steps of:
- extruding a polymeric material so as to form a plurality of advancing bundles of filaments,
- gathering the bundles of extruded filaments so as to form advancing yarns therefrom,
- winding the advancing yarns into respective packages which are coaxially mounted on a winding spindle, and
- separately controlling the yarn tension of each of the advancing yarns immediately upstream of the winding step and comprising advancing each yarn into contact with a separate yarn delivery mechanism which includes at least one rotating roller, and looping the advancing yarn about at least a portion of the circumferential periphery of the one rotating roller.
An apparatus for spinning a plurality of polymeric yarns and winding the same into respective yarn packages, comprising
- an extruder for spinning a plurality of multifilament polymeric yarns, and so that the yarns advance downwardly in a side by side arrangement which extends in a longitudinal direction,
- a winder for winding the advancing yarns onto respective bobbin tubes which are coaxially mounted on a longitudinally extending winding spindle, and
- a plurality of yarn delivery mechanisms positioned upstream of the winder, with the mechanisms operatively associated with respective ones of the yarns, for separately controlling the yarn tension of each of the yarns before reaching the winder, and wherein each of the yarn deliver mechanisms comprises a driven delivery roller positioned so that the associated yarn partly loops about the roller.
Dependencies are inferred from the claim text.