Method for performing single repiecing operation on yarn at work station position of free-end spinning machine

Abstract

The invention relates to a method for performing single repiecing operation on a yarn at a work station position of a free-end spinning machine. An electronic control unit (5) enables a lead-out roller (42) to rotate in an opposite direction by means of independent drive of the lead-out roller (42) of a lead-out mechanism (4), thus an end of the yarn (1) is sunken into a gathering tank of a rotary spinning rotor through a lead-out tube of a spinning unit (2), the end of the yarn (1) contacts a fiber belt and is involved. So, after a delay needed and used by the repiecing operation, the control unit (5) enables the lead-out roller (42) of the lead-out mechanism (4) and a winding rolling drum (7) to rotate by means of the independent drive in a direction that the yarn (1) is winded to a yarn cylinder (3), and a joint part and the subsequently spun yarn (1) are drawn out from the spinning rotor of the spinning unit (2) and are winded to the yarn cylinder (3). And a standby part of the yarn (1) or a standby part of the yarn (1) in an undervoltage compensator (6) lengthening the length of the yarn is formed again and then is gradually winded to the yarn cylinder (3).

Description

Technical field [0001] The present invention relates to a method for individually spinning yarn at a station of an open-end spinning machine by the separate drive of a winding drum and a draw-out mechanism, and a yarn length is arranged between the winding drum and the draw-out mechanism The undervoltage compensator. Background technique [0002] From CZ patent application 2006-344, there is known a method of individually spinning up yarn at the station of the open-end spinning machine, which combines the manual operation of the machine operator with the automatic operation of some devices of the station . This means that when the yarn breaks, for example, the operator cleans the spinning rotor when necessary, or cleans other parts of the station, finds the end of the yarn on the winding drum, and unwinds it with a certain excess amount. (unwinds) the spare amount of yarn, so that the undervoltage compensator of the yarn length sucks the yarn longer than the length necessary fo...

AI Technical Summary

Problems solved by technology

[0003] However, the disadvantages of this method are in particular the considerable amount of manual work that must be performed by the machine operator, and the complexity of guiding the yarn into the underpressure compensator, which means that the operator's attention will be diverted by the spinning machine's A single station (the spinning machine includes tens or even hundreds of such stations) takes a considerable amount of time and at the same time the total time required for the stringing-in operation becomes longer depending on the experience and skill of the operator

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