Method for operating free end spinning machine and free end spinning machine thereof

Abstract

The present invention relates to a method for operating a free end spinning machine and the free end spinning machine with a plurality of stations, wherein, each station is provided with a spinning device and a winding device used for manufacturing cross wounding bobbins. Furthermore a yarn storing device temporarily stores the yarn amount generated because of different accelerations of the spinning device and the winding device in the accelerated operation period of station. According to the invention, at a state of new batch, the tension of yarn in acceleration is measured on at least one station for aiming at various diameters of the cross wounding bobbins, wherein, the tension of yarn is a scale of the filling state of the yarn storing device. acceleration characteristic curves are confirmed for various diameters of the cross wounding bobbin depending on the acceleration speed of the yarn tension regulation winding device according to the regulated speed. Then the acceleration characteristic curves related with the diameters are applied for aiming at the corresponding batches in the acceleration period of the stations.

Description

technical field [0001] The invention relates to a method of operating an open-end spinning machine with a plurality of stations, wherein the stations have a spinning device and a yarn take-off device as well as a winding device for producing cross-wound bobbins, and the yarn The storage device temporarily stores the amount of yarn that occurs during the accelerated operation of the station due to the different acceleration speeds of the spinning device and the winding device. The invention also relates to an open-end spinning machine for carrying out the method. Background technique [0002] In order to store the yarn during acceleration, a pneumatically working yarn accumulator is often used in practice. Such yarn accumulators are known, for example, from German patents DE-AS 2 221 316, DE 101 39 075 A1 or DE 102005 055 717 A1. [0003] In German patent DE-AS 2 221 316 an open-end rotor spinning machine is described, the station of which has an open-end spinning device, a...

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Problems solved by technology

[0007] Such a device is described, for example, in the German patent DE 10 2004 057 825 A1 in connection with an automatic cross-winder for monitoring the filling state of a pneumatic yarn store, which is usually configured as an optical or capacitive sensor device and quite expensive

This means that the use of such a sensor device in open-end rotor spinning machines with 300 and more than 300 positions is not economical and therefore useless

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