DE10124270A1 - Method for "restarting a twisting device after a thread break" - Google Patents

Abstract

In a method for restarting a twisting device containing a twisting spindle (A) and a winding unit (B) after a thread break, the twisting thread is drawn off from the winding bobbin downstream of the twisting spindle, the twisted thread is fixed in a fixing point after reaching a piece of thread with an intact twisting thread, and related to cut the take-up spool behind this fixing point at a point such that there is sufficient thread length to then knot or splic the individual threads behind the fixing point mechanically or by hand with the spinning thread ends coming from the twisting spindle before the winding-up process is delayed in such a time after the thread spindle has restarted, it starts until the thread rotation specified for the thread has passed through the knotting or splicing point to the fixing point.

Description

The invention relates to a method for restarting a twisting spindle and a winding device containing twisting device after a thread break, in which one pulls the thread from the take-up spool downstream of the thread spindle and its Single thread ends with the spinning thread ends coming from the twisting spindle mechanically or knotted or spliced by hand before the twisting spindle and the take-up spool like the started, d. H. are driven in rotation.

In such a method there is a requirement that after the knotting or Ver splice the thread lengths adjacent to the knot or splice point preferably have the same twist as the entire winding wound on the take-up spool  Thread length, in order to use one of the further processing over the full bobbin winding To ensure the industry demands even threads.

After a thread break occurs, it is rewound from the take-up spool The twisted end of the twisted thread is relatively simple, for knotting or splicing a thread end to provide an intact, d. H. has a predetermined twist, by unwinding as much thread from the take-up spool until a piece of thread with an intact Twist is reached, so that the piece of thread coming from the take-up spool in can fix a fixing point and, based on the take-up reel, behind this fixing cut point at such a point that enough thread length of the individual threads for Ver knotting or splicing with ends of the thread fed from the twisting spindle is.

The knot or splicing process coming from the twisting spindle However, thread ends do not yet have a twisted thread, so that for the knotting or Splicing process only two individual, not twisted ends of the thread available stand.

If you do not twist these filament ends without additional preparation device is knotted or spliced with the thread ends pulled off the take-up spool after restarting the twisting spindle and the take-up spool a considerable one Thread length can be wound on the take-up spool without the specified twist.

To counteract this, it is common to use the spun thread coming from the twisting spindle either end by hand according to the not uncommon term "in the twisted hand", or to twist with each other in automated form, as it is for example in the DE 32 43 410 C2 is described, for which, however, increased mechanical expenditure is required is.

The object of the invention is to provide a simplified method create with which can be achieved that after the occurrence of a thread break when re put the twisting device into operation in the area of the splicing or knotting point essentially intact, d. H. there is a predetermined thread twist.  

This object is achieved by the method according to claim 1.

In this way it is achieved that after starting the twisting device in the between the knotting or splicing point on the one hand and the twisting spindle or in the On the other hand, thread spools used in the supply spindles are sufficient appropriate, d. H. predetermined twist of thread is built up before the previously fixed, by the The winding bobbin is released and the winding bobbin is released is put into operation.

It can be accepted that the twisted yarn originating from the twisting spindle hung to a certain extent behind the knot or splice point lying thread piece runs in. It could be observed that it started after restart the take-up spool to equalize the twist in the two with each other spliced or knotted thread ends comes.

The invention is described below with reference to the accompanying drawings.

In the drawing, a twisting point is shown as part of a double-wire twisting machine the main elements are a conventional double-wire twisting spindle A and a winding unit B includes.

The individual double-wire twisting spindles and winding units can in particular be independent dependent on the further double-wire twisting spindles or the further winding units the entire machine can be started and switched off again.

The thread 2 produced during operation of the double-wire twisting spindle A passes through the hem tail thread guide 1 lying in the extension of the hollow spindle axis during the twisting and winding process, it is then passed through a conventional thread feed mechanism 2 and, after passing through the thread advance 3 , wound up into a package S, which is driven by a friction drive roller 5 for example.

To restart the twisting device after a thread break, the twisted thread end pulled off the take-up spool S is inserted into a splicer or knotter 6 and fixed therein in a fixation point that the twist thread end located between this fixation point and the winding spool S has an intact twist end while behind the fixing point, ie in the direction of the twisting spindle A, there are two thread ends which are sufficiently long for the knotting or wear process and are not twisted together.

The thread spindle is then started again until the one intended for the thread Thread twist through the knotting or splicing point up to the fixing point has passed through before the winding process by re-driving the take-up reel S in Gear is set.

Instead of a conventional automatic splicer or knotter 6 , the knotting or wear of the thread ends to be connected to one another can also be carried out by hand, it being necessary to ensure that the thread pulled off the take-up spool S ends until immediately before the actual knotting or A splicing point is fixed with an intact twist.

As a drive unit for the take-up reel S, a z is representative of differently designed drive units in the drawing. B. single motor driven friction drive roller 5 is shown. It is essential for this drive unit that the restart of the take-up spool S can be precisely controlled, for example by means of a control unit C, in a time-controlled manner. This control unit C also controls the restart of the drive unit 7 driving the twisting spindle A. The time-delayed restart of the take-up spool S can thus take place in a time-controlled manner by means of the control unit C after the restart of the drive unit 7 of the twisting spindle A.

Software which is not part of the subject matter of the invention and is stored in control unit C. takes into account in particular the factors of spindle speed, rotation per meter and run-up time of the twisting spindle.

As shown schematically in the drawing, the splicer or knotter 6, and thus also the knotting or splicing point, is located between the thread feed mechanism 2 and the swiss tail thread guide eye 1 .

LIST OF REFERENCE NUMBERS

A double wire twist spindle
B take-up unit
C control unit

2

twine

1

pigtail

2

Yarn delivery

3

overfeed

4

-

5

Friktionsatriebswalze

6

Knoter; splicer

7

drive

Claims (3)

1. Method for restarting a twisting spindle (A) and a winding unit gat (B) containing twisting device after a thread break, in which the twine fa pulls the thread from the take-up spool (S) downstream of the twisting spindle fixed after reaching a piece of thread with an intact twist in a fixing point and, based on the take-up reel, behind this fixing point at such a point severed that there is enough thread length to then the behind the fixation point individual threads lying with the mecha spinning thread ends coming from the twisting spindle nically or by hand to knot or splice before starting the winding process so delayed after restarting the twisting spindle until the for the thread twist specified via the knotting or splicing point up to has passed to the fixing point. 2. The method according to claim 1, characterized in that the delayed restart the take-up spool by a central control unit C after restarting the twisting spin del is controlled. 3. The method according to claim 1 or 2, characterized in that for the time-delayed Restarting the take-up reel, the factors spindle speed, rotation per meter and Run-up time of the spindle must be taken into account.