WO2006100031A1

WO2006100031A1 - Ring spinning machine comprising a device which is used to produce fancy yarn with thread thickenings

Info

Publication number: WO2006100031A1
Application number: PCT/EP2006/002562
Authority: WO
Inventors: Peter Mann; Angelika Stoll
Original assignee: Saurer Gmbh & Co. Kg
Priority date: 2005-03-23
Filing date: 2006-03-21
Publication date: 2006-09-28
Also published as: DE102005014063A1

Abstract

On ring spinning machines comprising a device which is used to produce fancy yarn with thread thickenings, the thread balloon (9) is widened when a thread thickening (12) is passed through said thread balloon which can lead to a loss in quality or the thread can break. In order to prevent this, the balloon contraction ring (8) is momentarily placed into a position where it can be stored wherein it prevents said thread balloon from widening, when a thread thickening is passed through the thread balloon. The height is adjusted, preferably, towards the top, and it can also take place towards the bottom. The invention also relates to another embodiment, wherein an additional contraction balloon ring (81) which is associated with the contraction balloon ring (8), which is rigidly connected to the contraction balloon ring and is arranged at a distance thereon. In an additional embodiment, at least the rotational speed of the spindles of the ring spinning machine can be altered, preferably, reduced by passing a thread thickening through the thread balloon.

Description

Ring spinning machine with one. Device for producing fancy yarn with yarn thickening

It is known to produce Effektgame with yarn thickening of ring spinning machines by the delay of the drafting system is reduced for a short time.

As the yarn balloon thwarts such yarn thickening, the yarn balloon widens, since the mass of the yarn in this region is greater than that of the yarn between the yarn thickenings. In this case, the yarn thickening is subject to higher centrifugal acceleration and thus also greater thread breakage risk. In addition, there is a risk that the yarn thickening comes into contact with the yarn thickening of the yarn adjacent to a neighboring spindle, which passes through and widens its yarn balloon at the same time, thereby resulting in thread breaks. Even touching a possibly existing balloon boundary disc should be avoided.

Accordingly, the object of the invention was to prevent widening of the yarn balloon when passing through a yarn thickening in a fancy yarn insofar as this can lead to errors.

In a first embodiment, this can take place in that the common balloon constriction ring is vertically displaceable and its vertical displacement can be controlled as a function of passing through a yarn thickening by the thread balloon. An effective narrowing of the thread balloon is already achieved when the balloon constriction ring during the passage of a yarn thickening by the yarn balloon is shifted upward. However, a particularly effective concentration of the thread ballon is achieved when the balloon constricting ring follows the passage of a yarn thickening, so he initially the tapered yarn thickening moves upward, the yarn thickening is then guided down to after passing through the yarn thickening in his Normal position to return.

In US-PS 4,685,285 a balloon constriction is already shown, in by means of a connected to the ring rail piston / cylinder unit in its up-hill hiking in dependence on the height position of the ring rail and thus adjusting length of the thread balloon in addition to the upward - Walking the ring rail is led upwards. The displacement of the balloon constriction ring with respect to the ring rail is thus controlled only by its height position. A reference to the use of this displacement device to effect ring spinning machines for limiting the thread balloon is not apparent from this document.

An effective concentration of a widened by a yarn thickening thread balloon is already achievable when the balloon constriction of the converging yarn thickening moves contrary up and is moved back to its normal position after passing it. A particularly effective narrowing of the thread balloon is possible in that the balloon constriction is initially the tapering yarn thickening upwards, with the yarn thickening over its normal position also down and then moved back to its normal position.

Since the passage time of a yarn thickening by the yarn balloon depending on the Garnliefergeschwindigkeit and the length of Garnverdickung is very short and in the range of one to one and a half seconds to initiate the displacement of the movable balloon constriction ring before arrival of the yarn thickening in the thread balloon., The control unit the Garnverdickuhg triggers, this would have the device that moves the balloon constriction, forward a corresponding signal with flow.

In a second embodiment, a further balloon constriction ring can be arranged above the common balloon constriction ring, which can be firmly connected to the common balloon constriction ring. Here, the other balloon constriction in the Have substantially the same diameter as the common balloon constriction so that it comes into contact with the yarn only when passing through a yarn thickening and caused by it widening of the thread balloon.

DE 657 862 and DE 959 532 show ring spinning machines with two superposed balloon constriction rings, of which the lower is fixedly connected to the ring rail, while the upper is above the height position of the lower out by means of a displacement device upwards displaceable. Both balloon constricting rings are designed to narrow the thread balloon and are constantly touched by the yarn. A hint, both. Balloon restriction rings to connect firmly with the ring rail and the upper Baloneinengungsring to be arranged so that it is only touched by a thickening yarn and to prevent expansion of the thread balloon only when passing a yarn thickening, the publication can not be found. The publication also does not give any indication of the use of two balloon constriction rings in ring spinning machines with effect device. ^{■ •}

In a further embodiment is based on a ring spinning machine, which has a device by means of which the speed of the entire ring spinning machine, but at least the spindles, is variable. Here, the solution according to the invention is that the rotational speed of at least the spindles of the ring spinning machine is temporarily reduced during the passage of a yarn thickening through the yarn balloon. By reducing at least the rotational speed of the spindles, a smaller centrifugal force acts on the yarn balloon, so that the widening of the yarn balloon by the yarn thickening can be kept within admissible limits.

Also in this case, it appears expedient if the speed change traveled before entering the yarn thickening is introduced into the yarn balloon. This can be achieved by a warning signal of the yarn thickening triggering control device.

In the figures of the drawing, the various embodiments of the invention are shown schematically. Show

Fig. 1 shows a device with a displaceable in addition to its nach-top hiking

Balloon constriction ring;

Fig. 2 shows a device for rapidly displacing the balloon constriction ring; Fig. 3 shows a device with two superimposed, firmly interconnected Balloon constriction rings;

Fig. 4 shows a ring spinning machine for concurrently reducing the spindle speed during the passage of a yarn thickening.

FIGS. 1 and 2 each show a spindle 1 of a multiplicity of spindles of a ring spinning machine, in which a sleeve 3 with yarn winding 4 plugged onto a shaft 2 can be seen. On a ring rail 5, a ring 6 is fixed, on which a rotor 7 can rotate. Above the ring rail 5 is a balloon constriction ring 8, which narrows the balloon 9 of the tapered yarn 10 between migratory yarn guide 11 and the rotor 7. This balloon constriction ring is also performed with progressive upward movement of the ring rail 5 with reduced lifting height that he supports the yarn balloon 9 approximately at the lower third of its height and prevents an inadmissible expansion.

When feeding an effect-producing yarn thickening 12 into the upper region of the thread ballon 9, the balloon constriction ring 8 is moved ^" upwards into the position 8 'according to arrow A, in which it restricts widening of the thread balloon in this region the balloon constriction ring is returned to its normal position in the lower region of the thread balloon, since the widening which now also becomes effective in the lower region of the thread balloon counteracts the widening in the upper region with the yarn thickening 12 according to arrow C beyond its normal position in. The lower portion of the thread bale lead to the position 8 "to prevent widening of the thread ballon in this area. After complete passage of the yarn thickening by the yarn balloon, the balloon constriction ring 8 can be returned to its normal position according to arrow D.

The balloon constriction ring 8 is attached to a rail 13, for their rapid displacement depending on the embodiment of their suspension different embodiments are possible. FIG. 2 shows an embodiment of a rail 13 for the balloon constriction rings 8 attached to flexible drawstrings 14.

A derailleur 15 for controlling the Kopsaufbaues has a drum 16 to which the tension band 14 is gradually wound up and the Baloneinengungsringe 8 are displaced upwards. The drawstring is guided over stationary deflection plates 17. Between two Deflection pulleys a deflection roller 18 is arranged, which is mounted on a pivot arm 19, which in turn is mounted pivotally fixed. The swivel arm is pivotable by means of a rotatable cam, for example an eccentric 20, whose rotational movement can be triggered by a signal for producing a yarn thickening 12. The rotational movement of the eccentric takes place with a time delay when the generated yarn thickening passes through the yarn balloon 9.

FIG. 3 shows a spindle 2, in which the balloon constriction ring 8 is assigned a further balloon inlet ring 81, which is firmly connected to the balloon constriction ring 8 and stands above it. The mutual distance of the two Baloneinengungsringe 8 and 81 depends on the height of the thread balloon 9 and can increase with increasing balloon height.

If the diameter of the balloon constriction rings 81 approximately corresponds to that of the balloon constriction ring 8, there is the advantage that it is not affected by the yarn as it passes through the yarn sections between the yarn thickenings 12 due to the upwardly tapering yarn balloon. So it does not affect the yarn and can not hinder, for example, the propagation of the rotation to the spinning triangle. However, when passing through a yarn thickening by the yarn balloon, this is applied to the additional balloon constriction ring 81, whereby a widening of the thread balloon is prevented.

FIG. 4 shows the principle of a device on a ring spinning machine for producing effect yarn for changing the spindle speed during the passage of a yarn thickening 12 through the yarn balloon 9. The device comprises a control unit 21, which is adapted ^'to emit signals for producing the yarn construction. One of these

Signals accelerate the drive motor 22, which drives the input roller 23 and the center roller 24 of the drafting system 25 and thus reduces the main distortion between the center roller 24 and the output roller 26. This produces the intended yarn thickening.

At the same time, one of the signals of the control unit 21 goes to a drive motor 27, which drives the spindles 1 via a tangential belt 28. Only one spindle is shown, the others are indicated by their dot-dashed axes. This signal alters simultaneously with the yarn thickening signal generating the speed of the drive motor 27 and thus the spindles 1 during the passage of a yarn thickening 12 through the Thread Balloon 9. Reducing the spindle speed exerts less centrifugal acceleration on the yarn thickening and reduces the expansion of the yarn balloon during the passage of a yarn thickening through the yarn balloon.

Reducing the spindle speed while maintaining the speed of the output roller 26 reduces the yarn twist. This is done here advantageously when passing through a yarn thickening 12 through the yarn balloon 9. The reduction of the yarn twist thus coincides with the thick spot in the yarn and avoids over-twisting of the yarn in this section thereof.

In some cases, however, it may turn out that increasing the speed prevents expansion of the thread ballon. This is the case, for example, when the contact pressure of the rotor on the ring is too low to produce that tensile force in the yarn that would be required to prevent the widening of the yarn balloon.

But it is also possible to change the speed of the entire ring spinning machine when a yarn thickening 12 passes through a thread balloon 9.

The problem of widening the thread balloon when passing through a thick point occurs especially when the winding tension in the yarn during the construction of the cop is low. This is the case in particular in its lower area. In some cases, it is therefore sufficient to limit the height shifting of the balloon constriction ring or changing the speed of the spindles on the lower third or the lower half of Kopsaufbaues. ,

It is understood that this reduction of the spindle speed can be combined with the displacement of the balloon constriction ring 8 of Figure 1 or with the arrangement of two Baloneinengungsringe 8 and 81 of Figure 3 to a particularly effective reducing the expansion of the thread balloon 9 in the passage of a yarn thickening by the To achieve thread balloon or to combine the advantages of different devices. LIST OF REFERENCE NUMBERS

1 spindle

2 shaft

3 sleeve

4 yarn winding

5 ring rail

6 ring

7 runners

8 balloon constriction ring

9 thread balloon

10 yarn

11 thread guides

12 yarn thickening

13 rail

14 drawstrings

^• 15 rear derailleur

16 drum

17 deflecting disks

18 deflection roller

19 swivel arm

20 eccentrics

^■ 21 control unit

22 Drive motor of input and center roller

, 23 input roller

24 center roller

25 drafting system

26 output roller

27 Drive motor of the spindles

28 tangential straps

81 additional balloon constriction ring

Claims

claims

1. ring spinning machine with a device for producing effect yarn with Garnverdickungen and with a höhenverlagerbaren Ballooneinengungsring, characterized in that the Balloonengungsrmg (8) is so höhenverlagerbar that he effectively thickened a yarn thickening (12) when passing through the yarn balloon (9).

2. ring spinning machine according to claim 1, characterized in that the balloon constriction ring (8) during the passage of a yarn thickening (12) by the yarn balloon (9) is displaced upwards.

3. ring spinning machine according to claim 1, characterized in that the balloon constriction ring (8) during the passage of a yarn thickening (12) through the yarn balloon (9) follows the course of the yarn thickening.

4. ring spinning machine with a device for producing effect yarn with

Yarn thickening and with at least one balloon constriction ring, characterized in that above a common Balonieeinengüngsringes (8), a further Baloneinengungsring (81) is arranged.

5. ring spinning machine according to claim 4, characterized in that the further

Balloneinengungsring (81) is firmly connected to the common balloon constriction ring (8).

6. ring spinning machine according to claim 4, characterized in that the further Ballooneinengungsring (81) has approximately the same clear diameter as the common balloon constriction (8), so that it only by passing a yarn thickening (12) through the yarn balloon (9) with the Yarn comes into contact.

7. ring spinning machine with a device for producing effect yarn with Garnverdickungen and with a device for reducing the speed of at least the Spindles, characterized in that the rotational speed of at least the spindles (1) during the passage of a yarn thickening (12) by the yarn balloon (9) is temporarily changed.

8. Ringspinnmascliine according to claim 7, characterized in that that the speed of at least the spindles (1) during the passage of a yarn thickening (12) through the

Thread balloon (9) can be temporarily reduced.

9. ring spinning machine according to claim 7 or 8, characterized in that the drive of the spindles (1) by means of at least one variable-speed drive motor (27).

10. ring spinning machine according to claim 7, characterized in that the change in the rotational speed of the drive motor (27) in response to the generation of a yarn thickening (12).

11. ring spinning machine according to one or more of the preceding claims, characterized in that the Höhenverlagern of Baloneinengungsringes (8) or changing the speed of the spindles (1) limited to the lower third to the lower half of the altitude of the ring rail (5) becomes.