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Method for determining the quality parameters of a thread

A technology for quality parameters, yarns, applied in the direction of measuring devices, textile and paper making, instruments, etc., capable of solving problems such as yarn splicing devices not working properly

Inactive Publication Date: 2011-04-13
SAURER GERMANY GMBH & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] If breaks occur in the yarn joining area during this process, in many cases this is an indication that the yarn joining device under inspection is not working properly

Method used

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  • Method for determining the quality parameters of a thread
  • Method for determining the quality parameters of a thread
  • Method for determining the quality parameters of a thread

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Embodiment Construction

[0047] FIG. 1 shows a workstation 1 of an open-end spinning machine, which is designed so that the method according to the invention can be carried out on the workstation. A workstation 1 of this type also has an open-end spinning mechanism 2 and a winding mechanism 3 , as is known (and is therefore only shown schematically). The yarn 9 produced in the open-end spinning unit 2 leaves the open-end spinning unit 2 through the yarn drawing tube 21 during normal spinning operation of the workstation 1 . In other words, the yarn 9 is sucked out of the open-end spinning device 2 by means of the yarn drawing device 27 by means of the yarn drawing tube 21 or the connecting piece 16 arranged in this region. On its way to the winding device 3, the yarn 9 also passes the stop mechanism 26, the yarn storage devices 60 and 61 before it is wound on the rotationally driven cross-winding bobbin 8 by the yarn traversing device 24 And waxing device 62.

[0048] Here, the cross-wound bobbin 8 ...

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Abstract

The invention relates to a method for determining the quality parameters of a thread (9), which is produced at a work station (1) of an open-end rotor spinning frame and is wound to form a crosswound bobbin (8). The method is characterised by the following steps. The thread (9) that accumulates on the crosswound bobbin (8) is first laid in a drawing-off unit (27), which temporarily holds the thread (9). The crosswound bobbin (8) is then driven in the winding direction at a predefined test rate by its electric drive motor (56) and a predeterminable minimum tensile force is exerted on the thread (9). In addition, the electric variables of the drive motor (56), such as the rotary angle of the motor rotor, the motor voltage and / or the motor current are recorded and the quality parameter of the thread (9) is determined from at least one of said electric variables, taking into account the thread number that is present.

Description

technical field [0001] The invention relates to a method for determining quality parameters of a yarn produced at a workstation of a textile machine and wound to form a cross-wound bobbin. Textile machines of this type for producing cross-wound bobbins are known in various embodiments and are described in detail in numerous patents. Background technique [0002] An open-end rotor spinning machine is described, for example, in DE 10139075 A1, which has a plurality of similar workstations arranged next to each other in a row. At each individual station a yarn is produced which is then wound to form a cross-wound bobbin. For this purpose, the workstations each have a spinning mechanism and a winding mechanism. In addition, the workstations of these textile machines feature yarn draw-offs and suction nozzles. The workstations of this known textile machine are constructed in one piece and each workstation can be operated independently. [0003] In DE 19841604 A1 a method and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N33/36D01H13/26
CPCD01H13/26G01N33/365
Inventor 海因茨-格奥尔格·瓦森霍芬
Owner SAURER GERMANY GMBH & CO KG