DE102020105230A1 - Method and device for intermingling a synthetic multifilament thread - Google Patents

Abstract

The invention relates to a device and a method in which a multifilament thread is swirled by a predetermined fluid as well as being made to vibrate at a predetermined frequency with a vibration generating device.

Description

The invention relates to a method and a device for swirling a synthetic multifilament thread, so that the filaments forming the thread can become entangled and form tangled knots as a result of the swirling.

Devices for intermingling multifilament threads are known from the general prior art.

DE 10 2008 018 970 A1 describes a device for swirling a multifilament thread in a thread treatment channel. The device for swirling has a nozzle passage opening through which compressed air is fed into the thread treatment channel in order to divide the thread passed through the device into its filaments in a swirling process and to swirl them together.

The stream of compressed air hitting the thread causes the thread to be split up again and again and the split filaments forming the thread, guided by the air flow, wrap around one another. As a result of this looping, a tangled knot is created at preferably regular intervals, which is important for the thread cohesion of the thread and its subsequent processing.

It is not always possible to whirl up the filaments of the thread, especially if it has been treated with a preparation oil before whirling.

If e.g. If the thread is fed to the device for swirling with too much preparation oil, the filaments forming the thread are too strongly bonded to one another due to the cohesive and adhesive effect of the preparation oil, so that the thread cannot be swirled up sufficiently and the desired tangled knots cannot form.

It is therefore an object of the invention to provide a device and a method for swirling a multifilament thread which allow an improved, more effective and more efficient swirling of the thread so that the formation of tangled knots can be ensured.

The object is achieved with regard to the device according to the invention with a device for swirling a multifilament thread with the features according to claim 1.

According to a first aspect of the invention, there is provided an apparatus for entangling a synthetic multifilament yarn, comprising: a fluid entangling apparatus for entangling the multifilament yarn by means of a pretensioned fluid and an oscillation generating device for generating a vibration in the multifilament yarn by means of a vibration actuator.

The preloaded fluid is preferably compressed air. The preloaded fluid can also be a mixture of compressed air and a liquid, such as, for example, spin finish oil. Finishing oil is usually an emulsion or solution that contains distilled water and is applied to the synthetic threads, preferably after spinning.

Setting the thread to vibrate causes the filaments forming the thread to be shaken and fanned out so that the pretensioned fluid, in particular compressed air, can better grasp the individual filaments. By causing the thread to vibrate, a simplified and improved looping of the individual filaments of the thread can be caused. By shaking the thread into its individual filaments, the filaments are better separated from one another, so that the pre-tensioned fluid supplied can better grip the individual filaments and ensure that they are looped more effectively.

The number of tangled knots can thereby advantageously be increased and the distance between the tangled knots can be reduced. In addition, the preloaded fluid can be supplied at a lower pressure, as a result of which less energy has to be expended to produce the preload in the fluid.

Advantageous embodiments of the device emerge from the subclaims.

According to one embodiment of the device for swirling a multifilament thread, the fluid swirling device has a thread treatment channel for letting the multifilament thread through, a nozzle section with a nozzle passage opening for feeding the pretensioned fluid into the thread guide channel and a baffle section for swirling the pretensioned fluid.

According to one embodiment of the device for swirling a multifilament thread, the oscillation generating device is coupled to the fluid swirling device and / or to a thread guide arranged before / after the fluid swirling device in such a way that the multifilament thread can be set in oscillation by means of the oscillation generating device.

The oscillation generating device can also be coupled to a nozzle passage opening of the thread treatment channel and / or coupled to a thread guide arranged before or after the fluid swirling device, in such a way that the multifilament thread can be shaken open by means of the oscillation generating device before swirling with the pretensioned fluid.

Additionally or alone, the fluid swirling device can also be coupled to a vibration actuator.

The oscillation generating device shakes up the filaments of the thread by means of the oscillation actuator, the oscillation actuator, for example, on the thread guide, on the support rod of the thread guide and / or on the thread guide section of the thread guide, and / or locally before or after the fluid swirling device, i.e. can be arranged upstream or downstream in the thread guiding direction above or below the fluid swirling device.

In addition, a separate additional thread guide rod provided with the vibration generating device can be provided in front of the fluid swirling device for swirling the synthetic multifilament thread. The oscillation generating device can advantageously be retrofitted to an already existing fluid swirling device for swirling the synthetic multifilament thread and / or an existing thread guide.

To generate the predetermined oscillation in the thread, the oscillation generating device can be attached not only directly to the thread guide, but also to its holding and carrying structure if the carrying structure of the thread guide is suitable for the transmission of vibrations in the predetermined oscillation range.

According to one embodiment of the device for swirling a multifilament thread, the oscillation generating device has at least one deflection path less than or equal to up to and including ± 250 μm, preferably less than or equal to and including ± 100 μm and / or is in a frequency in the range from 0.1 to 30 kHz oscillatable, preferably 0.1 to 15 kHz.

Due to the short deflection path with a small amplitude in the range of ± 250 µm, a better shaking of the thread can be provided. In addition, the additional oscillation in the frequency range defined above can provide improved shaking and preparation of the thread. In addition, excess spin finish can be shaken off the threads and filaments by shaking.

According to an exemplary embodiment of the device for swirling a multifilament thread, the oscillation actuator has a piezo oscillator, a membrane oscillator, a quartz oscillator, a pneumatic oscillator, an ultrasound generator and / or a magnetic oscillator.

The oscillation or oscillation device is not limited to a piezo oscillator. A quartz oscillator with an electronic circuit for generating oscillations, which has a quartz oscillator as the frequency-determining component, can also be used. A vibration actuator driven by a membrane or magnet can also be used, or any other oscillation device in which a short deflection path can be generated which is within the range of approximately -250 μm to + 250 μm, preferably less than or equal to ± 100 μm and / or can be oscillated at a frequency in the range from 0.1 to 30 kHz, preferably 0.1 to 15 kHz. The circuit of the vibration actuator can be set to a predetermined value or also regulated.

Advantageously, the adjacent components to the vibration actuator are decoupled from the transmission of the vibrations, for example by means of suitable dampers, such as rubber and / or spring bearings.

With regard to the method, the object is achieved according to the invention with a method for intermingling a multifilament thread with the features according to claim 6.

According to another aspect of the invention, a method is provided for entangling a multifilament thread, wherein the thread is moved at a predetermined speed along a fluid entangling device to form tangled knots and is entangled by means of a pretensioned fluid which is fed onto the multifilament thread from the fluid entangling apparatus, characterized in that the multifilament thread is additionally set in vibration.

Setting the multifilament thread to vibrate offers the advantage that threads stuck together by preparation oil can be better divided and fluffed into individual filament strands, so that the individual filaments can be more easily swirled by means of a pretensioned fluid.

Advantageous embodiments of the method emerge from the subclaims.

According to one embodiment of the method, the multifilament thread is additionally or exclusively set into oscillation by means of the pretensioned fluid before being swirled.

This offers the advantage that the multifilament thread of the fluid swirling device is already supplied to the fluid swirling device in a fluffed and thus isolated state, so that the fluffed out thread provides a larger surface for the pretensioned fluid, so that the individual filaments can be better wrapped around one another.

According to one embodiment of the method, the multifilament thread is additionally or exclusively caused to vibrate by means of the pretensioned fluid after being swirled. This offers the advantage that an excess preparation agent, e.g. Preparation oil, can be shaken off better.

According to one embodiment of the method, the multifilament thread is set in oscillation with a frequency in the range of approximately 0.1 of 30 kHz and with a deflection path smaller than or equal to and including ± 250 μm, preferably smaller than or equal to and including ± 100 μm, transversely to the thread guide direction relocated. In this case, transverse to the thread guiding direction is to be understood as meaning an essentially perpendicular, inclined introduction of the oscillation. The oscillation can also be introduced additionally or exclusively essentially parallel to the thread guiding direction.

This offers the advantage that the thread can be sufficiently bulged into individual filaments.

Another object of the invention is to provide an apparatus for producing a synthetic multifilament thread from a plastic melt, with which threads can be effectively formed with tangled knots.

This object is achieved according to the invention with a device having the features according to claim 10.

The present invention is explained in more detail below using exemplary embodiments in conjunction with the associated drawings.

• 1 A und 1B unterschiedliche Schnittansichten einer Vorrichtung zum Verwirbeln eines multifilen Fadens mittels eines vorgespannten Fluid in schematischen Ansichten;
• 2 ein Ausführungsbeispiel der erfindungsgemäßen Vorrichtung zum Verwirbeln eines multifilen Fadens mit einer Schwingungserzeugungsvorrichtung;
• 3A und 3B eine schematische Ansicht eines Fadenführungsabschnittes eines Fadenführers mit der Schwingungserzeugungsvorrichtung, wobei der multifile Faden in unterschiedlichen Zuständen gezeigt ist, wenn die Schwingungserzeugungsvorrichtung nicht in Betrieb ist und wenn die Schwingungserzeug in Betrieb ist;
• 4A und 4B eine Fluidverwirbelungsvorrichtung mit der Schwingungserzeugungsvorrichtung in unterschiedlichen Montagepositionen; und
• 5 ein schematische Blockdiagramm der Verfahrensschritte des erfindungsgemäßen Verfahrens zum Verwirbeln eines synthetischen multifilen Fadens.

These show:

• 1 A and 1B different sectional views of a device for swirling a multifilament thread by means of a pretensioned fluid in schematic views;
• 2 an embodiment of the device according to the invention for swirling a multifilament thread with a vibration generating device;
• 3A and 3B a schematic view of a thread guide section of a thread guide with the vibration generating device, the multifilament thread being shown in different states when the vibration generating device is not in operation and when the vibration generator is in operation;
• 4A and 4B a fluid swirling device with the vibration generating device in different mounting positions; and
• 5 a schematic block diagram of the method steps of the method according to the invention for swirling a synthetic multifilament thread.

Detailed Description of the Preferred Embodiments:

In the 1A and 1B is a swirl device 10 for swirling a synthetic multifilament thread 2 with a pre-stressed fluid 4th shown schematically. The pre-stressed fluid 4th is preferably compressed air.

1A Figure 3 shows a longitudinal sectional view of the swirl device described above 10 .

The swirl device 10 swirls the multifilament thread 2 by means of the pretensioned fluid 4th . The swirl device 10 has a thread treatment channel 6th on that of a baffle section 5 and a nozzle wall portion 1 is defined. In the nozzle wall section 1 is a nozzle through hole 3 formed through which the biased fluid 4th , such as compressed air, into the thread treatment channel 6th can be performed.

The swirl device 10 is between a first thread guide 7.1 and a second thread guide 7.2 arranged the multifilament thread 2 in the thread treatment channel 6th Position so that it is over the nozzle port opening 3 supplied preloaded fluid 4th on the multifilament thread 2 meets and divides it and preferably additionally stimulates the formation of tangled knots by turbulence.

The pre-stressed fluid 4th that through the nozzle port 3 into the thread treatment channel 6th introduced with a predetermined pressure meets the multifilament thread 2 , divides it, then hits the baffle section 5 resulting in an additional turbulence in the preloaded fluid 4th contributes, which also creates an intertwining of the multifilament threads.

The in thread treatment channel 6th of the biased fluid 4th generated turbulence is in 1B with the curved arrows 14th shown schematically.

Usually the multifilament thread 2 before going to the swirler 10 is supplied, with a spin finish oil, for example preferably in front of the thread guide 7.1 , Mistake.

The spin finish oil preferably causes the individual filaments to stick together 2.1 to 2.n of the multifilament thread 2 what the splitting and entangling of the filaments 2.1 to 2.n can complicate.

In the following description and in connection with the 2 to 5 is the intermingling device according to the invention and the method according to the invention for more effective intermingling of a synthetic multifilament thread 2 described in detail.

2 shows, in a schematic partial sectional view, the device according to the invention for intermingling a synthetic multifilament thread, which has a fluid intermingling direction 100 and a vibration generating device 11 having.

The synthetic, multifilament thread 2 is spun from a melt comprising, for example, polyamide or polyester, by means of a spinneret (not shown), a curtain of threads made of individual filaments 2.1 to 2.n is formed. The thread curtain made of individual filaments is then cooled and placed over a thread guide 7.1 merged and the fluid swirling device 100 fed.

The fluid swirling device 100 has a thread treatment channel 6th which is in fluid communication with a nozzle port 3 stands over which a pretensioned fluid 4th how, for example, compressed air can be supplied. The pre-tension or the pressure build-up of the pre-tensioned fluid 4th takes place, for example, in an air compressor.

The nozzle passage device 3 is in a nozzle wall section 1 the substantially cylindrical fluid swirling device 100 educated.

The nozzle passage opening is preferred 3 at a predetermined angle with respect to the thread guide direction F of the synthetic multifilament thread 2 inclined so that the multifilament thread 2 can be swirled better.

An additional swirling of the pre-tensioned fluid 4th becomes on the baffle section 5 causes the opposite of the nozzle wall section 1 is arranged, both the thread treatment channel 6th define.

In the in 2 The embodiment shown is the vibration generating device 11 at the thread guide 7.1 appropriate.

The vibration generating device 11 has a vibration actuator 13 on. With the vibration actuator 13 it can be, for example, a piezo actuator, a magnetically driven actuator, a pneumatic actuator, a lever mechanism and / or an ultrasound generator. The respective actuator is preferably an oscillator. The vibration actuator 13 is designed in such a way that it is able, for example, to set the thread guide vibrating at a frequency of 0.1 to 30 kHz, preferably 0.1 to 15 kHz. The vibration actuator 13 can have a gear 9 or directly to the thread guide 7.1 be coupled.

In 2 and 3B is with the double arrow 12 a vibration generating state for generating a predetermined vibration in the multifilament yarn 2 shown schematically.

In 3A Fig. 3 is a schematic sectional view of the multifilament thread 2 shown on a thread guide section 8th of the thread guide 7.1 applied, wherein the vibration generating device 11 is not vibrating and is out of order. How out 3A the multifilament thread becomes apparent 2 without additional oscillation, essentially without a division into the individual filaments 2.1 to 2.n along the thread guide section 8th guided.

3B shows the state when the vibration actuator 13 the vibration generating device 11 is put into operation and a vibration 12 generated.

As in 3B indicated schematically, causes the oscillation 12 of the thread guide section 2 a distribution of the individual filaments 2.1 to 2.n on the surface of the thread guide section 8th of the thread guide 7.1 . The parameter n is a placeholder for a natural number> one.

4A and 4B show in sectional views the fluid swirling device 100 , wherein the vibration generating device 11 on different positions of the fluid swirling device 100 is mounted.

In 4A is the vibration generating device 11 or the vibration actuator 13 about the gearbox 9 on the baffle section 5 assembled. In 4B is the vibration generating device 11 on the nozzle wall portion 1 the fluid swirling device 100 appropriate. The vibration actuator can also be mounted directly on the fluid swirling device, ie without a gear or lever mechanism.

The vibration generating device 11 or the vibration actuator 13 can be in the longitudinal direction, inclined or transverse to the direction of extension of the thread treatment channel 6th be arranged.

The vibration actuator 13 or its transmission 9 can also be angled perpendicular and / or parallel to the extension direction of the thread treatment channel 6th or be arranged to the thread guide direction F.

5 shows different method steps in a schematic block diagram S1 to S3 for swirling the multifilament thread 2 according to the method of the invention for intermingling a multifilament thread 2 .

In a first process step S1 becomes the multifilament thread 2 at a predetermined speed with respect to the nozzle passage opening 3 moved in thread guide direction F.

In step S2 becomes a pressurized fluid 4th , in particular compressed air at a predetermined pressure into the nozzle passage opening 3 the fluid swirling device 100 introduced to the multifilament thread 2 into its filaments 2.1 to 2.n to swirl and entangle the filaments 2.1 to 2.n to create. The parameter n gives the number of filaments in the multifilament thread 2 where n is a natural number greater than one.

In step S3 becomes the multifilament thread 2 by means of the vibration generating device 11 kinetically set in oscillation, preferably in such a way that an oscillation with a frequency in the range from 0.1 to 30 kHz is applied to the multifilament thread. The maximum deflection path by which the multifilament thread is deflected is preferably in the range of up to ± 250 μm.

The above procedural steps S1 to S3 can be carried out in different order, for example before the introduction of the pre-stressed fluid 5 the multifilament thread 2 by means of the oscillator 3 be set in vibration.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102008018970 A1 [0003]

Claims (10)

Device for swirling a synthetic multifilament thread (2), comprising: a fluid swirling device (100) for swirling the multifilament yarn (2) by means of a pretensioned fluid (4) and a vibration generating device (11) for generating a vibration in the multifilament yarn by means of a vibration actuator (13). Device for swirling a synthetic multifilament thread (2) according to Claim 1 characterized in that the fluid swirling device (100) has a thread treatment channel (6) for the passage of the multifilament thread, a nozzle section (1) with a nozzle passage opening (3) for feeding the pretensioned fluid (4) into the thread guide channel (6) and a baffle plate section ( 5) for swirling the pretensioned fluid (4). Device for swirling a synthetic multifilament thread (2) according to one of the preceding claims, characterized in that the oscillation generating device (11) is coupled to the fluid swirling device (100) and / or to a thread guide (7.1, 7.2) arranged upstream / downstream of the fluid swirling device is that the multifilament thread (2) can be caused to oscillate with the oscillation generating device (11). Device for swirling a synthetic multifilament thread (2) according to one of the preceding claims, characterized in that the vibration generating device has at least one deflection path less than or equal to and including ± 250 µm, preferably less than or equal to and including ± 100 µm and / or at a frequency im Range from 0.1 to 30 kHz can be oscillated. Device for swirling a synthetic multifilament thread (2) according to at least one of Claims 1 or 2 , characterized in that the vibration actuator (13) has a piezo oscillator, a membrane oscillator, a quartz oscillator, a pneumatic oscillator, an ultrasound generator and / or a magnetic oscillator. Method for entangling a synthetic multifilament thread, wherein the thread is moved (S1) at a predetermined speed along a fluid entangling device (100) to form tangled knots and is entangled (S2) by means of a pretensioned fluid which is supplied from the fluid entangling apparatus, characterized in that, that the multifilament thread is also set in motion (S3). Method for entangling a synthetic multifilament thread according to Claim 6 , characterized in that the multifilament thread is additionally or exclusively caused to vibrate by means of a vibration generating device (11) before being swirled. Method for entangling a synthetic multifilament thread according to Claim 6 , characterized in that the multifilament thread is additionally or exclusively caused to vibrate by means of a vibration generating device (11) after being swirled. Method for entangling a synthetic multifilament thread according to one of the preceding Claims 6 to 8th , characterized in that the multifilament thread is set in oscillation with a frequency in the range of approximately 0.1 of 30 kHz and with a deflection stroke smaller than or equal to and including ± 250 µm, preferably smaller than or equal to and including ± 100 µm transversely to the thread guide direction (F) is relocated. Device for generating a multifilament thread from a plastic melt by means of a spinneret, the device being a device for swirling the multifilament thread after at least one of the Claims 1 to 5 and / or the device according to the method according to at least one of Claims 6 to 9 is operated.

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