EP2646608B1 - Device and method for producing interweaving knots - Google Patents

Description

The invention relates to a device for generating interlacing nodes in a multifilament yarn according to the preamble of claim 1 and to a method for generating interlacing nodes with such a device.

A generic device for generating interlacing nodes as well as a generic method for generating interlacing nodes in a multifilament yarn are known from the DE 41 40 469 A1 known.

In the production of multifilament yarns, it is well known that the cohesion of the individual filament strands in the yarn is provided by so-called interlacing knots. Such interlacing nodes are generated by a compressed air treatment of the thread. Depending on the thread type and process, the number of interlacing nodes desired per unit length and the stability of the interlacing nodes may be subject to different requirements. Particularly in the production of carpet yarns used for further processing immediately after a melt spinning process, high knot stability and a high number of knots per unit length of the thread are desired.

In order to achieve in particular a relatively high number of intertwining nodes at higher yarn speeds, the generic device has a rotating nozzle ring, which cooperates with a stationary stator. The nozzle ring has a Fadenführungsnut on the circumference, evenly distributed in the groove bottom over the circumference several radially aligned nozzle bores open. The nozzle holes penetrate the nozzle ring from the guide groove all the way to one inner centering diameter, which is guided on the circumference of the stator. The stator has an internal pressure chamber which is connected by a chamber opening formed on the circumference of the stator. The chamber opening on the stator and the nozzle bores in the nozzle ring lie in a plane, so that upon rotation of the nozzle ring, the nozzle bores are successively fed to the chamber opening. The pressure chamber is connected to a compressed air source, so that during the interaction of the nozzle bore and the chamber opening, a compressed air impact is generated in the Fadenführungsnut the nozzle ring. In the mouth region of the chamber opening, a cover is provided opposite the nozzle ring, so that the thread can be guided in a closed guide groove. The inlet and outlet are each formed by an inlet yarn guide and an outlet yarn guide. The inlet yarn guide and the outlet yarn guide are assigned to the nozzle ring.

In the known device, the nozzle ring has a plurality of nozzle bores evenly distributed on the circumference, so that a relatively high number of entanglement nodes are generated. In this case, however, it has been found that the interlacing nodes generated had a relatively large extent and relatively low stability. Such poorly developed interlacing knots would be completely unsuitable, in particular for yarns which are directly fed to a further processing process.

It is therefore an object of the invention to further develop the generic device for generating interlacing nodes and the generic method for generating interlacing nodes such that set intense and strong embedding nodes on the thread.

A further object of the invention is to provide a device and a method of the generic type which offer a high degree of flexibility in the number and shape of the interlacing nodes generated.

This object is achieved for a device in that the Einlauffadenführer and the outlet yarn guide are arranged such that the contact angle of the thread in the guide groove of the nozzle ring is greater than an opening angle of the chamber opening on the stator.

Advantageous developments of the invention are defined by the features and feature combinations of the respective subclaims.

The invention is based on the finding that the thread is guided with contact in the guide groove at a first air inlet into the nozzle bore of the nozzle ring. Thus, the yarn is held directly over the mouth of the nozzle bore. The contact of the thread in the guide groove narrows the mobility of the thread. This results in an intensive knot formation.

A small opening angle of the chamber opening on the stator also has the particular advantage that short opening times can be generated at the nozzle bores, which lead to short and pronounced pressure pulses. In addition, the air consumption can be minimized or an increased loss of compressed air leakage avoided.

In order to obtain a secure contact of the thread in the guide groove, the device according to the invention is preferably designed such that the contact wrap angle of the thread in the guide groove of the nozzle ring at least by a factor of 1.2 preferably at least by a factor of 1.5 is greater than the opening angle the chamber opening at the stator. This allows the thread before and after the compressed air supply defined in the guide groove.

The inlet yarn guide and the outlet yarn guide are preferably arranged mirror-symmetrically to the nozzle ring, wherein the chamber opening may be formed on the stator symmetrical or asymmetrical to a mirror symmetry axis. In a symmetrical arrangement of the chamber opening equal feed and drainage properties of the thread are realized on both sides. However, it can also be advantageous for the formation of the interlacing nodes if the inlet of the thread takes place in relation to the outlet with a longer contact lap. An influence on the knot formation can be achieved even with inverse length ratios. In that regard, in this case, the chamber opening on the stator would be formed asymmetrically to the mirror axis of symmetry between the yarn guides.

Since the thread tension on a running thread in the generation of intertwining knots is also of great importance, regardless of the respective thread speed and regardless of the respective rotational speed of the nozzle ring, the inlet yarn guide and the outlet yarn guide is held such that the contact angle of the guide groove in a range between 12 ° and 180 °. Thus, depending on the tension condition of the thread corresponding contact wrap can be selected. In this way, intensive intertwining nodes can be produced on threads which are guided with low thread tensions. In this case, the yarn is held at a relatively large contact wrap angle in the guide groove of the nozzle ring. The relatively small Kontaktumschlingungswinkel in the guide grooves are preferably used in threads that are performed with relatively high yarn tensions.

In order to produce according to the choice of Kontaktumschlingungswinkel in the guide groove corresponding pressure pulse through the nozzle bore in the nozzle ring, the development of the device according to the invention is preferably used, in which the chamber opening is formed on the stator such that the opening angle of the chamber opening in a range between 10 ° and 40 °. Larger opening angles of the chamber opening are avoided, however, in order not to obtain excessive air consumption and losses.

For the uniformity of the knot formation, especially at low contact wrap angles, it has been found that the distance between the inlet thread guide and the nozzle ring can have a positive effect. In that regard, it is proposed to form a distance to form a contactless inlet path of the thread between the inlet yarn guide and the nozzle ring, which causes a length of the inlet path in the range of 2 cm to 15 cm.

Accordingly, a distance is formed to form a non-contact outflow path of the thread between the Auslauffadenführer and the nozzle ring, which causes a length of the discharge path in the range of 2 to 15 cm.

The number of entanglement nodes generated per unit length in the thread can advantageously be increased by forming a plurality of nozzle bores on the nozzle ring in accordance with a preferred variant of the device according to the invention. In this case, a dividing angle formed between two adjacent nozzle bores is always greater than the opening angle of the chamber opening on the stator. This ensures that each nozzle bore produces a substantially uniform compressed air pulse.

The intensity of the compressed air pulses and thus the compressed air treatment of the thread can be further improved by the fact that the nozzle bores of the nozzle ring has a length to diameter ratio in the range of 0.5 to 5. Thus, in the generation of compressed air pulses energy losses due to flow resistance can be advantageously avoided.

In the apparatus according to the invention, the nozzle ring can basically be driven by the incoming thread. In particular, a plurality of parallel arranged side by side guide grooves for guiding a plurality of threads are formed on the nozzle ring. However, in order to adjust specifically relative speeds between the thread and the nozzle ring, the development of the device according to the invention is particularly advantageous, in which the nozzle ring is designed to be drivable and is coupled to an electric motor. This allows the nozzle ring to drive faster or slower relative to the thread speed of the thread.

The inlet thread guide and outlet thread guide associated with the driven nozzle ring are preferably formed by freely rotatable deflection rollers. In order to obtain certain yarn tensions at the inlet or outlet of the thread, the development of the invention is particularly advantageous in which the inlet yarn guide or the outlet yarn guide is formed by a driven godet. This can be generated by adjusting a speed difference between the nozzle ring and the galette additional effects for knot formation.

The yarn friction produced at a relative speed between the nozzle ring and the yarn has had a particularly advantageous effect on knot strength and knot length. In that regard, the method according to the invention is particularly advantageous in order to use the device according to the invention to guide a thread guided between two godets to treat. In this case, the nozzle ring is driven at a peripheral speed which is lower than the thread speed of the thread. The nozzle ring and the thread are guided in the same direction, so that on the thread in addition to the contact friction and a sliding friction arises, which positively influences the compressed air treatment.

In particular, the process variant has proven to be very positive in the swirling of so-called BCF yarns. Here, the peripheral speed of the nozzle ring is set by a factor in the range of 0.35 to 0.80 smaller than the thread speed of the thread. For factors> 0.8, it has been found that the knot strength of the knots in the thread decreases. Likewise, with smaller factors of 0.35, there is an uneven distribution of the nodes with a weaker expression on the thread. In that regard, the circumferential speed of the nozzle ring should be less than the thread speed of the thread in the inventive device by a factor in the range of 0.35 to 0.8 in order to use the advantageous effect of the sliding friction on the formation of the interlacing nodes can.

The device according to the invention and the method according to the invention are particularly suitable for use on multifilament yarns at yarn speeds of above 3,000 m / min. To produce stable and pronounced entanglement nodes in high numbers. The device according to the invention and the method according to the invention are explained in more detail below with reference to an exemplary embodiment of the device according to the invention.

Fig. 1

schematisch eine Längsschnittansicht eines Ausführungsbeispiels der erfindungsgemäßen Vorrichtung

Fig. 2

schematisch eine Querschnittansicht des Ausführungsbeispiels aus Fig. 1

Fig. 3

schematisch eine vereinfachte Querschnittansicht des Ausführungsbeispiels aus Fig. 1

Fig. 4

schematisch eine vereinfachte Querschnittansicht eines weiteren Ausführungsbeispiels der erfindungsgemäßen Vorrichtung

Fig. 5

schematisch eine Querschnittansicht eines weiteren Ausführungsbeispiels der erfindungsgemäßen Vorrichtung

They show:

Fig. 1

schematically a longitudinal sectional view of an embodiment of the device according to the invention

Fig. 2

schematically a cross-sectional view of the embodiment of Fig. 1

Fig. 3

schematically a simplified cross-sectional view of the embodiment of Fig. 1

Fig. 4

schematically a simplified cross-sectional view of another embodiment of the device according to the invention

Fig. 5

schematically a cross-sectional view of another embodiment of the device according to the invention

In the Fig. 1 , and 2 a first embodiment of the device according to the invention is shown in several views. Fig. 1 shows the embodiment in a longitudinal sectional view and in Fig. 2 the embodiment is shown in a cross section. Unless an explicit reference is made to one of the figures, the following description applies to both figures.

The embodiment of the device according to the invention for generating interlacing nodes in a multifilament yarn has a rotating nozzle ring 1, which is cup-shaped and is connected via an end wall 4 and a hub 5 with a drive shaft 6. The hub 5 is fastened to a free end of the drive shaft 6 for this purpose.

The nozzle ring 1 is guided with its centering diameter jacket-shaped on a guide collar 12 of a stator 2. On the circumference, the nozzle ring 1 has a circumferential guide groove 7, in whose groove bottom a nozzle bore 8 opens, which penetrates the nozzle ring 1 completely up to an inner centering diameter. In this embodiment, the nozzle ring 1 has two offset by 180 ° to each other nozzle bores 8, which open into the groove bottom of the guide groove 7. Basically, the number of nozzle bores 8 formed in the nozzle ring 1 is exemplary. Whether one or more nozzle bores are included in the nozzle ring 1 is of the respective process and thread type, since the number of nozzle bores 8 is substantially proportional to a number of entanglement nodes generated per unit length in a thread.

The stator 2 has at the periphery of the guide collar 12 at a position a chamber opening 10 which is connected to a pressure chamber 9 formed in the interior of the stator 2. The pressure chamber 9 is connected via a compressed air connection 11 with a compressed air source, not shown here. The chamber opening 11 on the guide collar 12 and the nozzle bores 8 in the nozzle ring 1 are formed in a plane, so that the nozzle bores 8 are alternately guided into the region of the chamber opening 10 by rotation of the nozzle ring 1. The chamber opening 10 is formed as a slot and extends in the radial direction over a longer guide region of the nozzle bore 8. The length of the chamber opening 10 thus determines an opening time of the nozzle bore 8, while this is coupled via the chamber opening 10 with the pressure chamber 9 and in the Guiding 7 generates a compressed air pulse.

The stator 2 is held on a carrier 3 and has concentric with the guide collar 12 has a bearing bore 18. Within the bearing bore 18, the drive shaft 6 is rotatably supported by the bearing 23.

The drive shaft 6 is coupled to an electric motor 19, through which the nozzle ring 1 can be driven at a predetermined peripheral speed.

In the region of the chamber opening 10 on the circumference of the guide collar 12, a cover 13 is assigned to the nozzle ring 1 on the opposite side.

As from the illustration in Fig. 1 shows, the cover 13 is movably supported on the carrier 3. In this embodiment, the cover 13 is formed by way of example via a pivot axis 14 relative to the nozzle ring 1 pivotally. In principle, however, it is also possible to arrange the cover 13 firmly.

As from the illustration in Fig. 2 shows the cover 13 extends in the radial direction on the circumference of the nozzle ring 1 over the region of the chamber opening 10. In this area, a thread 20 is guided in the guide groove 7 on the circumference of the nozzle ring 1. For this purpose, the nozzle ring 1 on an inlet side 21, an inlet yarn guide 15 and an outlet side 22 associated with a discharge yarn guide 16. The thread 20 can thus be guided between the inlet thread guide 15 and the outlet thread guide 16 with a partial looping on the nozzle ring 1. The inlet yarn guide 15 and the outlet yarn guide 16 are formed in this embodiment by deflecting pins or alternatively by deflection rollers.

At the in Fig. 1 and 2 illustrated embodiment, a compressed air is introduced into the pressure chamber 9 of the stator 2 for generating interlacing nodes in the multifilament yarn 20. The nozzle ring 1, which guides the thread 20 in the guide groove 7, generates compressed air pulses within certain time intervals as soon as one of the nozzle bores 8 reaches the chamber opening 10. In this case, the compressed-air pulse leads to a local turbulence on the multifilament yarn 20, so that interlacing nodes form on the yarn.

In order to be able to produce uniform and intensively formed intertwining knots on the thread, the thread 20 is guided with a contact wrap angle in the groove base of the guide groove 7. Here, the inlet yarn guide 15 and the outlet yarn guide 16 are arranged such that the contact wrap angle of the yarn in the guide groove the nozzle ring has a Mindestumschlingungswinkel in relation to the chamber opening 10 minimum.

In Fig. 3 are in a schematic cross-sectional view of the embodiment of Fig. 1 and Fig. 2 the geometric sizes and relationships are shown in more detail. Here, the inlet yarn guide 15 and the outlet yarn guide 16 are arranged mirror-symmetrically to the nozzle ring 1, so that 16 forms a mirror symmetry axis 17 between the inlet yarn guide 15 and the outlet yarn guide. In this embodiment, the mirror symmetry axis 17 is identical to a center of the chamber opening 10 on the circumference of the stator 2. The chamber opening 10 extends to both sides of the mirror symmetry axis 17, so that an opening angle α is formed. The mirror symmetry axis 17 is thus an angle bisector to the opening angle α, so that the opening angle α has the angle section α ₁ on the inlet side 21 and the angle section α ₂ on the outlet side. Thus, α = α ₁ + α ₂ .

The position of the inlet yarn guide 15 and the outlet yarn guide 16 is selected in this embodiment such that form a plurality of guide portions between the two yarn guides 15 and 16 on the yarn 20. Thus, a first guide section is characterized by an inlet section of the thread, which is characterized by the distance between the inlet thread guide 15 and a casserole point of the thread 20 on the circumference of the guide groove 7 of the nozzle ring 1. The inlet section is marked with the lowercase letter a.

Due to the mirror symmetry, an outflow path between the outlet yarn guide 16 and a discharge point of the yarn 20 is thus formed on the discharge side 22 of the guide groove 7 of the nozzle ring 1 equivalent. The outlet of the thread is indicated by the lowercase letter b. In this embodiment, the inlet section a is equal to the outlet section b.

In principle, however, it is also possible to produce 15 and 16 by a non-uniform arrangement of the yarn guides length differences in the inlet section and the outlet section. The inlet section a and the outlet section b defines a so-called clamping length, in which the thread is fixed during the air treatment.

However, a third essential guide section of the thread 20 has proved to be very important for the formation of the interlacing nodes, which is determined by the contact length of the thread 20 in the groove bottom of the guide groove 7 of the nozzle ring 1. This contact length of the thread 20 is defined by the contact wrap angle β. In this respect, the nozzle ring 1 on the inlet side 21, the angle section β ₁ and on the outlet side 22 to the angle section β ₂ , wherein the total contact wrap angle β is the sum of Partial angle β ₁ and β ₂ results.

As from the illustration in Fig. 3 As can be seen, the contact wrap angle β is formed larger than the opening angle α of the chamber opening 10 on the circumference of the stator 2. Thus, the thread 20 is already performed before contact with a pressure pulse safely with contact on the groove bottom of the guide groove 7 of the nozzle ring 1. Thus, the mobility of the thread 20 is limited in total between the inlet yarn guide 15 and the outlet yarn guide 16, which in particular has led to an increase in node stability. It has been shown that the contact wrap angle of the thread in the guide groove 7 of the nozzle ring 1 should be formed at least by a factor of 1.2 preferably at least by a factor of 1.5 greater than the opening angle α of the chamber opening 10 on the stator 2. Depending on Thread type and process, the contact wrap angle can be determined by the position of the inlet yarn guide Form 15 and outlet yarn guide 16 in a range between 12 ° and 180 °. The chamber opening 10 on the stator 2 preferably has an opening angle α in the range of 10 ° to 40 °. Larger opening angles above 40 ° lead to a relatively large compressed air consumption and relatively large compressed air losses without the number or the formation of the interlacing nodes improving.

The inlet section a and the outlet section b are adjusted depending on the thread type and process in a range between 2 cm to 15 cm, which tends to shorter stretches are formed in threads with fine titer and longer stretches in threads with larger titer.

To make as short as possible during the opening times, while the nozzle bore 8 of the nozzle ring 1 with the chamber opening 10 and the pressure chamber 9 in the stator 2, it is necessary to form an intense compressed air pulse that the compressed air within the nozzle bore 8 as small as possible distances must overcome, so that correspondingly low pressure losses. Therefore, the nozzle bore 8 in the nozzle ring 1 is preferably formed such that the length of the nozzle bore 8 and the diameter of the nozzle bore 8 are in a certain ratio. The length-diameter ratio in the range of 0.5 to 5 has been found to be particularly advantageous to the formation of the pressure pulses. Thus, the shortest possible nozzle bores 8 are to be formed on the nozzle ring 1.

In addition, in the case of a plurality of nozzle bores 8 arranged distributed around the circumference in the nozzle ring 1, care must be taken to ensure that a pitch angle between the nozzle bores 8 is always greater than the opening angle α of the chamber opening 10. This ensures that the entangling nodes in the thread 20 each result from a generated pressure pulse, thus no overlays and irregularities can arise.

In the Fig. 4 illustrated arrangement of the stator 2 relative to the mirror axis of symmetry 17 is exemplary. In principle, different contact lengths between the thread 20 and the nozzle ring 1 can be formed both on the inlet side 21 and on the outlet side 22. So is in Fig. 4 an embodiment shown in which the chamber opening 10 on the stator 2 by an angle φ offset from the mirror symmetry axis 17 is formed. According to the embodiment according to Fig. 3 is thus formed at the same opening angles α with the same contact wrap angle β, the contact zone to the arrival of the pressure pulse on the inlet side 21 larger. Thus, a further influence is possible to change interweaving nodes in their nature and size.

At the in Fig. 1 and 2 illustrated embodiment, the nozzle ring 1 via the electric motor 19 is driven. Basically, however, there is also the possibility that the nozzle ring 1 is formed without a drive and is driven solely by the thread friction of the guided with Teilumschlingung thread 20.

However, it has proved to be particularly advantageous if a certain relative speed is present between the thread and the nozzle ring 1. In that regard, a method according to the invention for generating interlacing nodes is preferred with that in FIG Fig. 1 and 2 executed device executed.

In the method according to the invention, the thread is usually guided between two godets which determine a thread speed of the thread. With this yarn speed, the thread 20 is guided on the circumference of the nozzle ring 1. In order to produce a thread tension that is advantageous for the generation of intertwining nodes, irrespective of the thread tension set between the godets, the nozzle ring 1 is driven at a peripheral speed which is lower as the thread speed of the thread 20, wherein the nozzle ring 1 and the thread 20 are guided in the same direction, as in Fig. 2 is shown. This creates a slip between the groove bottom of the guide groove 7 and the thread 20, so that additional frictional forces act on the thread 20. Thus, the number, the strength and the uniformity of the interlacing nodes could be improved. Here, in particular, the settings have proven in which the peripheral speed of the nozzle ring 1 by a factor in the range of 0.35 to 0.8 is smaller than the yarn speed of the thread 20. However, the slip generated by the relative speed should have a minimum size, so that higher peripheral speeds no longer had a positive effect.

The inventive method can also be advantageous with the in Fig. 5 illustrated embodiment of the device according to the invention. In Fig. 5 the embodiment of the device according to the invention is shown in a cross-sectional view. The embodiment is essentially identical to the embodiment according to Fig. 1 and 2 so that at this point only the differences will be explained to avoid repetition.

At the in Fig. 5 illustrated embodiment of the device according to the invention, the inlet yarn guide 15 is formed on the inlet side 21 by a driven godet 24. The godet 24 is associated with a Beilaufrolle 25, so that a thread 20 can be guided with multiple wrapping and after running from the godet 24 runs directly into the guide groove 7 of the nozzle ring 1. The looping angle of the thread 20 which adjusts itself at the nozzle ring 1 is determined by the arrangement of the godet 24 and the outlet thread guide 16 arranged on the discharge side 22.

At the in Fig. 5 illustrated embodiment can be set between the godet 24 and the nozzle ring 1 advantageously a speed difference, which can lead to an increase in a yarn tension or to relieve the thread.

It should be mentioned at this point that the in Fig. 5 illustrated embodiment of the outlet yarn guide 16 could also be formed by a godet. Such an arrangement also offers the advantage that the thread is particularly low friction feasible.

LIST OF REFERENCE NUMBERS

1

nozzle ring

2

stator

3

carrier

4

bulkhead

5

hub

6

drive shaft

7

guide

8th

nozzle bore

9

pressure chamber

10

chamber opening

11

Compressed air connection

12

guide collar

13

cover

14

swivel axis

15

Inlet yarn guide

16

Outlet yarn guide

17

Mirror symmetry

18

bearing bore

19

electric motor

20

thread

21

supply side

22

outlet side

23

camp

24

Galette

25

companion roll

Claims (13)

1. Device for producing interweaving knots in a multi-filament thread (20) with a rotating annular nozzle (1), which comprises a circumferential guiding groove (7) and at least one nozzle bore (8) leading in a radial direction into the guiding groove (7), with a stationary stator (2) which has the annular nozzle (1) on its circumference and which comprises a pressure chamber (9) that has a chamber opening (10) on its circumference, with a cover (13) attached to the guiding groove (7), and with an inlet thread guide (15) and an outlet thread guide (16) arranged on both sides of the annular nozzle (1) and guiding the thread (20) with contact in the base of the guiding groove (7) of the annular nozzle (1), wherein an opening angle (α) of the chamber opening (10) on the stator (2) and a contact wrap angle (ß) of the thread (20) are overlapping in the guiding groove (7), characterized in that the inlet thread guide (15) and the outlet thread guide (16) are arranged in such a way that the contact wrap angle (ß) of the thread (20) in the guiding groove (7) of the annular nozzle (1) is greater than the opening angle (α) of the chamber opening (10) on the stator (2).
2. Device according to Claim 1, characterized in that the contact wrap angle (ß) of the thread (20) in the guiding groove (7) of the annular nozzle (1) is greater than the opening angle (α) of the chamber opening (10) on the stator (2) at least by a factor 1.2, preferably by a factor 1.5.
3. Device according to Claim 1 or 2, characterized in that the inlet thread guide (15) and the outlet thread guide (20) are arranged mirror-symmetrically to the annular nozzle (1) and that the chamber opening (10) on the stator (2) is designed symmetrically or asymmetrically to a mirror-symmetrical axis (17).
4. Device according to any one of claims 1 to 3, characterized in that the inlet thread guide (15) and the outlet thread guide (16) are configured in such a way that the contact wrap angle ranges between 12° and 180°.
5. Device according to any one of claims 1 to 4, characterized in that the chamber opening (10) on the stator (2) is designed in such a way that the opening angle (α) of the chamber opening (10) ranges between 10° and 40°.
6. Device according to any one of the preceding claims, characterized in that for the formation of a non-contact inlet section (α) of the thread (20) between the inlet thread guide (15) and the annular nozzle (1) a space is formed that generates a length of the inlet section (α) in the range between 2 cm and 15 cm.
7. Device according to any one of the preceding claims, characterized in that for the formation of a non-contact outlet section (b) of the thread (20) between the outlet thread guide (16) and the annular nozzle (1) a space is formed that generates a length of the outlet section (b) in the range between 2 cm and 15 cm.
8. Device according to any one of claims 1 to 7, characterized in that several nozzle bores (8) are provided at the annular nozzle (1), wherein an angular pitch formed between two adjacent nozzle bores (8) is greater than the opening angle (α) of the chamber opening (10) on the stator (2).
9. Device according to any one of claims 1 to 8, characterized in that the nozzle bore (8) of the annular nozzle (1) has a length-diameter ratio in the range between 0.5 and 5.
10. Device according to any one of claims 1 to 9, characterized in that the annular nozzle (1) is designed to be powered and is coupled with an electric motor (19).
11. Device according to any one of claims 1 to 9, characterized in that the inlet thread guide (15) or the outlet thread guide (16) is formed by a powered godet (24).
12. Method for producing interweaving knots on a running thread by means of a device according to any one of the preceding claims 1 to 11, in which the thread is guided between two godets, characterized in that the annular nozzle is powered with a circumferential speed that is lower than the speed of the thread, wherein the annular nozzle and the thread are rectified.
13. Device according to Claim 11, characterized in that the circumferential speed of the annular nozzle is smaller than the speed of the thread by a factor in the range between 0.35 and 0.80.

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