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Bobbin preparation method

A bobbin and rewinding technology, applied in the field of rewinding process, can solve the problems of uncontrollable yarn suction, unsatisfactory effect, high amount of waste yarn, etc., and achieve the effect of saving energy

Active Publication Date: 2022-04-01
RIETER AUTOMATIC WINDER GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, the known methods of bobbin preparation have the disadvantage that, since the yarn suction is relatively uncontrollable, the amount of waste yarn that occurs when the yarn tail is shortened appears to be very high
The use of a yarn brake that rotates after detecting the yarn tail on the bobbin with a sensor results in no Satisfactory effect

Method used

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  • Bobbin preparation method

Examples

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Comparison scheme
Effect test

Embodiment Construction

[0039] figure 1 A bobbin preparation device 1 is shown in a schematic view, in which a bobbin 2 with yarn is prepared for the rewinding process, where the yarn, which is not shown here, is placed on the bobbin 2 with its yarn The thread tail is moved towards the shortening and locking mechanism 4 by means of the suction mechanism 5 .

[0040] Before the suction of the suction mechanism 5 is activated, the yarn brake 3 is brought into contact with the bobbin 2 so that the yarn end placed on the bobbin 2 is blocked by the yarn brake 3 despite the existing suction. The yarn brake 3 is adjusted to move briefly from the bobbin 2 from the holding position blocking the yarn unwinding to the unwinding position releasing the yarn unwinding after the suction is provided or at the same time. During the dwell period of the yarn brake 3 in the unwinding position, the yarn tail is moved towards the shortening and blocking mechanism 4, wherein the length of the unwinding yarn depends on the...

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PUM

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Abstract

The invention relates to a bobbin preparation method for preparing a bobbin for a rewinding process by placing a yarn tail in a predetermined gripping position on the bobbin, comprising the steps of: Suction of the end of the thread towards the shortening mechanism; detection of the yarn end on the shortening mechanism by means of the yarn sensor; blocking of the suction and / or pressing of the yarn brake against the bobbin by means of a locking mechanism; shortening of the yarn tail; placing the yarn tail on the pick-up position provides for a bobbin preparation method that ensures that there is only a small amount of waste yarn when the yarn tail is shortened. The thread brake is adjusted into the holding position blocking the unwinding of the yarn from the bobbin, and the yarn brake is adjusted briefly one or more times to release the unwinding of the yarn with or after the suction is provided. in the winding position until the yarn end is detected by the yarn sensor.

Description

technical field [0001] The present invention relates to a method of preparing a bobbin for a rewinding process by placing a yarn tail in a predetermined pick-up position on a bobbin, comprising the following steps: [0002] - suction of the yarn tail towards the shortening means by means of a suction means providing suction, [0003] - detection of the yarn end on the shortening means by means of the yarn sensor, [0004] - blocking the suction by means of a blocking mechanism, [0005] - truncate the yarn tail, and [0006] - drop the yarn tail on the pick-up position. Background technique [0007] The bobbins produced on the ring spinning machine are usually rewound on the winder for further processing into large packages of cross-wound bobbins. For this purpose, the upper yarn retrieved from the cross-wound bobbin and the lower yarn from the feed bobbin are always required at the various winding positions of the winder. In the event of a feed package change, the auto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B65H67/08B65H54/06
CPCB65H67/085B65H54/06B65H2701/31B65H67/086
Inventor E·巴索尔H-P·林德曼
Owner RIETER AUTOMATIC WINDER GMBH