CN111636128B - Method and device for entangling synthetic multifilament threads - Google Patents
Method and device for entangling synthetic multifilament threads Download PDFInfo
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- CN111636128B CN111636128B CN202010127135.XA CN202010127135A CN111636128B CN 111636128 B CN111636128 B CN 111636128B CN 202010127135 A CN202010127135 A CN 202010127135A CN 111636128 B CN111636128 B CN 111636128B
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/08—Interlacing constituent filaments without breakage thereof, e.g. by use of turbulent air streams
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
The present invention relates to a method and apparatus for entangling synthetic multifilament yarns, wherein the multifilament yarns are entangled by a predetermined fluid and vibrated at a predetermined frequency by vibration generating means.
Description
Technical Field
The invention relates to a method and a device for entangling (twisting) synthetic multifilament threads, so that the filaments constituting the yarn are interlaced with each other due to the entanglement and are capable of forming a twisted knot (entanglement knots).
Background
Devices for entangling multifilament threads are known from the general prior art.
DE102008018970A1 describes a device for entangling multifilament threads in a yarn treatment channel. The device for entanglement has nozzle passage openings by means of which compressed air is guided into the yarn processing passage in order to divide the yarn guided through the device into filaments during entanglement and to entangle the filaments with one another.
The compressed air flow acting on the yarn has the following effect: the yarns are repeatedly separated and the separated filaments forming the yarns are entangled with each other under the direction of an air stream. Due to the entanglement, entanglement knots are formed in each case, preferably at regular intervals, which are important for the cohesion of the yarn and for its subsequent handling.
Relaxing the filaments of a yarn by entanglement is not always successful, particularly when the yarn is treated with spin finish prior to entanglement.
For example, when yarn is fed to the entanglement unit while carrying excess spin oil, filaments forming the yarn may excessively bond to each other due to cohesion and adhesion of the spin oil, so that sufficient relaxation of the yarn due to entanglement is unsuccessful, failing to construct a desired entangled knot.
Disclosure of Invention
It is therefore an object of the present invention to provide a device and a method for entangling multifilament threads, which each allow an improved more effective and efficient entangling of said yarns, so that the formation of entangled knots can be ensured.
According to the invention, the object pertaining to the device is achieved by a device for entangling multifilament threads.
According to a first aspect of the present invention there is provided an apparatus for entangling synthetic multifilament yarns, the apparatus having:
a fluid entangling apparatus for fluid entangling said multifilament yarns with a pre-load (pre-stretched); and vibration generating means for generating vibrations in the multifilament thread by means of a vibration actuator.
The pre-load fluid is preferably compressed air. The pre-load fluid may also be a mixture of compressed air and a liquid, such as spin oil. Spin oils are typically emulsions or solutions containing distilled water, preferably applied to the synthetic threads after spinning.
The effect of setting the yarn in vibration is: the filaments of the yarn are agitated and loosely structured so that the preloaded fluid (especially compressed air) can better reach the individual filaments. Simplifying and improving the winding of the individual filaments of the yarn can be achieved by setting the yarn in vibration. As the yarn is stirred into its individual filaments, the filaments can be better separated from each other, so that the injected preloaded fluid can better reach the individual filaments and can more effectively ensure their entanglement.
The number of intertwining nodules can thus be advantageously increased, as well as the spacing between the intertwining nodules can be reduced.
Moreover, the pre-load fluid may be supplied at a lower pressure, and thus less energy is required to be invested in generating the pre-load in the fluid.
According to one exemplary embodiment of an apparatus for entangling a multifilament yarn, the fluid-entangling apparatus has: a yarn processing channel for passing through the multifilament yarn; a nozzle portion having a nozzle passage opening for supplying the preload fluid into the yarn guide passage; and an impact (impact) plate portion for entangling the preloaded fluid.
According to an exemplary embodiment of the device for entangling multifilament threads, the vibration generating device is coupled to the fluid entangling device and/or to a yarn guide arranged before/after the fluid entangling device, such that the multifilament threads can be set in vibration by means of the vibration generating device.
The vibration generating device may also be coupled to the nozzle channel opening of the yarn processing channel and/or to a yarn guide arranged before or after the fluid entangling device, such that the multifilament yarn can be agitated by means of the vibration generating device before being preloaded with fluid entanglements.
The fluid entanglement device may additionally or solely be coupled to a vibration actuator.
The filaments of the yarn are agitated by means of vibration generating means of the vibration actuator, wherein the vibration actuator may be arranged, for example, on the yarn guide, on a support bar of the yarn guide, and/or on a yarn guiding portion of the yarn guide, and/or positionally before or after the fluid entangling device, i.e. upstream or downstream, above or below the fluid entangling device in the yarn guiding direction.
Furthermore, a separate additional lead rod provided with vibration generating means may be provided for entangling the synthetic multifilament thread prior to the fluid entangling means. The vibration-generating device is advantageously retrofittable to already existing fluid-entangling devices for entangling synthetic multifilament threads and/or to already existing yarn guides.
In order to generate a predetermined vibration in the yarn, the vibration generating device may be fixed not only directly to the yarn guide, but also to the holding and supporting structure of the yarn guide if the supporting structure of the yarn guide is adapted to transmit vibrations within a predetermined vibration range.
According to an exemplary embodiment of the device for entangling a multifilament thread, the vibration generating device has at least one deflection path smaller than or equal to + -250 μm (inclusive), preferably smaller than or equal to + -100 μm (inclusive), and/or is capable of vibrating at a frequency of 0.1 to 30kHz, preferably at a frequency of 0.1 to 15 kHz.
Agitation of the yarn can be improved by a short deflection path of small amplitude in the range of + -250 μm.
Additional vibrations within the frequency range defined above can additionally provide improved agitation and preparation of the yarn. In addition, excess spin oil can be thrown off from the yarns and filaments due to agitation.
According to an exemplary embodiment of the device for entangling a multifilament thread, the vibration actuator comprises a piezoelectric oscillator, a membrane oscillator, a quartz oscillator, a pneumatic oscillator, an ultrasonic generator and/or a magnetic oscillator.
Neither the vibrating means nor the oscillating means are limited to piezoelectric oscillators. A quartz oscillator for generating vibrations may also be used, which has an electronic circuit with a piezoelectric crystal as a structural element for determining the frequency. A vibrating actuator driven by a membrane or a magnet, or any other oscillating device may also be used, wherein a short deflection path in the range of about-250 μm to +250 μm, preferably less than or equal to + -100 μm, may be generated and/or may be capable of vibrating at a frequency of 0.1 to 30kHz, preferably 0.1 to 15 kHz. The circuit of the vibration actuator may be set to a predetermined value or adjusted.
The components adjacent to the vibration actuator are advantageously disengaged in terms of transmitting vibrations, for example by means of suitable dampers, such as rubber and/or spring bearings.
According to the invention, the object concerning the method is achieved by a method for entangling multifilament threads.
According to another aspect of the present invention there is provided a method for entangling multifilament threads, wherein a yarn for forming an entangled knot is moved along a fluid entangling apparatus at a predetermined speed and entangled by means of a preloaded fluid fed to the multifilament threads from the fluid entangling apparatus, characterized in that the multifilament threads are additionally set in vibration.
Setting the multifilament yarn in vibration has the following advantages: in particular, yarns bonded by spin oil can be better separated into individual filaments strands and bulked (bulk) so that the individual filaments can be better entangled by means of preloaded fluid.
According to an exemplary embodiment of the method, the multifilament thread is additionally or just prior to entanglement set in vibration by means of a vibration generating device.
This provides the following advantages: the multifilament yarn fed to the fluid entangling device is already in a bulked and thus singulated state, such that the bulked yarn provides a larger contact area for the preloaded fluid and, therefore, the individual filaments are better able to intertwine with each other.
According to an exemplary embodiment of the method, the multifilament thread is additionally or only after entanglement set in vibration by means of a pre-applied fluid. This provides the advantage that excess spin finish, such as spin finish, can be better thrown off.
According to an exemplary embodiment of the method, the multifilament yarn is vibrated at a frequency in the range of about 0.1 to 30kHz and repositioned transversely to the yarn guiding direction with a deflection stroke of less than or equal to + -250 μm (inclusive), preferably less than or equal to + -100 μm (inclusive). Transverse to the yarn guiding direction is herein understood to mean that vibrations are introduced in a substantially vertical oblique manner. In addition or exclusively, vibrations can also be introduced substantially parallel to the yarn guiding direction.
This provides the advantage of ensuring that the yarn is sufficiently bulked into individual filaments.
It is a further object of the present invention to provide an apparatus for producing synthetic multifilament threads from a plastic melt, by means of which the yarn can be effectively structured with twines.
According to the invention, this object is achieved by the device according to the invention.
Drawings
The invention will be explained in more detail below by means of exemplary embodiments in connection with the accompanying drawings.
In the figure:
FIGS. 1A and 1B show in schematic views different cross-sectional views of an apparatus for entangling a multifilament yarn with a preloaded fluid;
fig. 2 shows an exemplary embodiment of a device for entangling multifilament threads according to the invention, which device has vibration generating means;
fig. 3A and 3B show schematic views of a yarn guiding portion of a yarn carrier with a vibration generating device, wherein multifilament yarns are shown in different states, i.e. when the vibration generating device is not operating, and when the vibration generating device is operating;
FIGS. 4A and 4B illustrate a fluid entangling device with vibration-generating device in various assembled positions; and
fig. 5 shows a schematic block diagram of the method steps of the method for entangling synthetic multifilament yarns according to the invention.
Detailed Description
Fig. 1A and 1B schematically illustrate an entanglement device 10 for entangling a synthetic multifilament yarn 2 by means of a preloaded fluid 4. The pre-load fluid 4 is preferably compressed air.
Fig. 1A shows a longitudinal cross-section of the entanglement device 10 described above.
The entangling apparatus 10 entangles the multifilament yarn 2 by means of the preloaded fluid 4. The entanglement unit 10 has a yarn processing channel 6 defined by the impingement wall portion 5 and the nozzle wall portion 1. The nozzle channel opening 3 is formed in the nozzle wall 1, through which nozzle channel opening 3a preloaded fluid 4, for example compressed air, can be guided into the yarn processing channel 6.
The entanglement device 10 is arranged between the first yarn guide 7.1 and the second yarn guide 7.2, both the first yarn guide 7.1 and the second yarn guide 7.2 positioning the multifilament yarn 2 in the yarn processing channel 6 such that the preloaded fluid 4 supplied by means of the nozzle channel opening 3 encounters the multifilament yarn 2 and separates the multifilament yarn, preferably additionally exciting the multifilament yarn by entanglement to form entangled knots.
The preloaded fluid 4 introduced into the yarn processing channel 6 by means of the nozzle channel opening 3 meets the multifilament yarn 2 and separates the latter, then hits the impact wall 5, which contributes to the additional entanglement of the preloaded fluid 4 and the additional generation of interlacing of the multifilament yarn.
Entanglement in the yarn processing channel 6 caused by the pre-load fluid 4 is schematically indicated by curved arrow 14 in fig. 1B.
The multifilament thread 2 is typically provided with spin oil, for example on a thread guide 7.1, before being fed to the entangling device 10.
The spin oil preferably has the effect of bonding the individual filaments 2.1 to 2.N of the multifilament thread 2, which potentially prevents the separation and interlacing of the filaments 2.1 to 2.N.
The entangling apparatus according to the present invention and the method for entangling the synthetic multifilament yarn 2 according to the present invention more effectively will be described in detail in the following description with reference to fig. 2 to 5.
Fig. 2 shows in a schematic partial cross-section an apparatus for entangling synthetic multifilament threads according to the invention, said apparatus having a fluid entangling apparatus 100 and a vibration generating apparatus 11.
The synthetic multifilament thread 2 is spun from a melt comprising, for example, polyamide or polyester by means of a spinning nozzle (not shown), wherein a thread curtain (thread curtain) is formed from the individual filaments 2.1 to 2.N. The curtain of individual filaments is then cooled and collected by means of the thread guide 7.1 and fed to the fluid entangling apparatus 100.
The fluid entangling device 100 has a yarn processing channel 6, the yarn processing channel 6 being in fluid communication with a nozzle channel opening 3 through which nozzle channel opening 3a preloaded fluid 4, such as compressed air, can be supplied. The establishment of the preload force or pressure of the preload fluid 4 takes place, for example, in a compressed air compressor.
The nozzle channel opening 3 is configured in the nozzle wall 1 of the substantially cylindrical fluid entanglement device 100.
The nozzle channel opening 3 is preferably inclined at a predetermined angle with respect to the yarn guiding direction F of the synthetic multifilament yarn 2, so that the multifilament yarn 2 can be better entangled.
Additional entanglement of the preloaded fluid 4 is achieved on an impingement wall portion 5 arranged opposite the nozzle wall portion 1, wherein said impingement wall portion 5 and said nozzle wall portion 1 together define a yarn processing channel 6.
The vibration generating device 11 in the exemplary embodiment shown in fig. 2 is attached to the wire guide 7.1.
The vibration generating device 11 has a vibration actuator 13. The vibration actuator 13 may be, for example, a piezoelectric actuator, a magnetically driven actuator, a pneumatic actuator, a lever mechanism, and/or an ultrasonic generator. The corresponding actuator is preferably an oscillator. The vibration actuator 13 is conceived such that said vibration actuator 13 is capable of setting the wire guide in vibration, for example, at a frequency of 0.1 to 30kHz, preferably 0.1 to 15 kHz. The vibration actuator 13 may be coupled to the wire guide 7.1 by means of a transmission 9 or directly to the wire guide 7.1.
A vibration generation state for generating a predetermined vibration in the multifilament yarn 2 is schematically shown with a double-headed arrow 12 in fig. 2 and 3B.
Fig. 3A shows a schematic cross-sectional view of a multifilament thread 2, which multifilament thread 2 rests on the thread guide 8 of the thread guide 7.1, wherein the vibration generating device 11 is not in vibration and is not in operation. As can be seen from fig. 3A, the multifilament thread 2 is guided along the thread guiding part 8 without any additional vibration, essentially without being separated into individual filaments 2.1 to 2.N.
Fig. 3B shows a state in which the vibration actuator 13 of the vibration generating device 11 is in operation and generates the vibration 12.
As schematically shown in fig. 3B, the vibration 12 of the yarn guide 8 has the effect of distributing the individual filaments 2.1 to 2.N over the surface of the yarn guide 8 of the yarn guide 7.1. Where the parameter n is the placeholder for natural numbers greater than 1.
Fig. 4A and 4B show the fluid-entangling apparatus 100 in cross-sectional views, wherein the vibration-generating device 11 is assembled in different positions of the fluid-entangling apparatus 100.
The vibration generating device 11 or the vibration actuator 13 in fig. 4A is assembled to the impact wall 5 by means of the transmission device 9, respectively. The vibration generating device 11 in fig. 4B is attached to the nozzle wall portion 1 of the fluid entangling device 100. The vibration actuator may also be assembled directly to the fluid entanglement device, i.e. without the need for a transmission.
The vibration generating means 11 or the vibration actuator 13 can be arranged in the longitudinal direction obliquely or transversely to the direction of extension of the yarn processing channel 6, respectively.
The vibration actuator 13 or its transmission 9 can also be arranged at an angle, respectively, so as to be perpendicular and/or parallel to the direction of extension of the yarn processing channel 6 or the yarn guiding direction F.
Fig. 5 shows in a schematic block diagram the different method steps S1 to S3 for entangling the multifilament thread 2 according to the method of the invention for entangling the multifilament thread 2.
In a first method step S1, the multifilament thread 2 is moved in the thread guiding direction F at a predetermined speed relative to the nozzle channel opening 3.
In step S2, a pre-load fluid 4, in particular compressed air at a predetermined pressure, is introduced into the nozzle channel opening 3 of the fluid entangling apparatus 100 so as to entangle the multifilament threads 2 into filaments 2.1 to 2.N thereof and produce interlacing of the filaments 2.1 to 2.N. The parameter n here denotes the number of filaments in the multifilament thread 2, where n is a natural number greater than 1.
In step S3, the multifilament yarn 2 is dynamically put into vibration by means of the vibration generating device 11, preferably such that vibration with a frequency in the range of 0.1 to 30kHz acts on the multifilament yarn. The maximum deflection path for the deflection of the multifilament thread is preferably in the range of up to 250 μm here.
The above-mentioned method steps S1 to S3 can be carried out in different sequences; for example, the multifilament thread 2 may thus be put into vibration by means of the vibration actuator 13 before the introduction of the pre-load fluid 4.
Claims (10)
1. An apparatus for entangling synthetic multifilament threads (2), the apparatus for entangling synthetic multifilament threads having:
-fluid entangling means (100) for entangling said multifilament yarn (2) with a preloaded fluid (4); and vibration generating means (11) for generating vibrations in the multifilament yarn (2) by means of a vibration actuator (13) for agitating and loosening filaments of the multifilament yarn (2) so that the preloaded fluid (4) for entangling the multifilament yarn (2) in the fluid entangling device (100) can better reach the filaments of the multifilament yarn (2), wherein the vibration generating means has at least one deflection path which is smaller than or equal to + -250 μm and/or can vibrate at a frequency in the range of 0.1 to 30 kHz.
2. Device for entangling a synthetic multifilament thread (2) according to claim 1, wherein the fluid entangling device (100) has: a yarn treatment channel (6) for passing the multifilament yarn; a nozzle section (1) having a nozzle channel opening (3) for feeding the preloaded fluid (4) into the yarn processing channel (6); and an impingement plate portion (5) for entangling the pre-load fluid (4).
3. Device for entangling a synthetic multifilament thread (2) according to claim 1 or 2, wherein the vibration generating device (11) is coupled to the fluid entangling device (100) and/or to a yarn guide (7.1, 7.2) arranged before/after the fluid entangling device such that the multifilament thread (2) can be put in vibration by means of the vibration generating device (11).
4. Device for entangling a synthetic multifilament thread (2) according to claim 1 or 2, wherein the vibration actuator (13) comprises a piezoelectric oscillator, a membrane oscillator, a quartz oscillator, a pneumatic oscillator, an ultrasonic generator and/or a magnetic oscillator.
5. Device for entangling a synthetic multifilament thread (2) according to claim 1 or 2, wherein the at least one deflection path is less than or equal to ±100 μm.
6. A method for entangling a synthetic multifilament thread, wherein S1 is moved along a fluid entangling apparatus (100) at a predetermined speed for forming a spun yarn and S2 is entangled with the yarn by means of a pre-load fluid supplied from the fluid entangling apparatus, characterized in that S3 additionally places the multifilament thread in vibration for agitating and loosely structuring filaments of the multifilament thread (2) such that the pre-load fluid (4) for entangling the multifilament thread (2) in the fluid entangling apparatus (100) is better able to reach the filaments of the multifilament thread (2), and wherein the multifilament thread is placed in vibration at a frequency of 0.1 to 30kHz and is repositioned transversely to a yarn guiding direction (F) with a deflection stroke of less than or equal to ±250 μm.
7. Method for entangling synthetic multifilament yarn according to claim 6, characterised in that the multifilament yarn is additionally or just prior to entangling, in that the multifilament yarn is put in vibration by means of a vibration generating device (11).
8. Method for entangling synthetic multifilament yarn according to claim 6, characterised in that the multifilament yarn is put in vibration by means of vibration generating means (11), additionally or only after entanglement.
9. The method for entangling a composite multifilament yarn according to claim 6, wherein the deflection stroke is less than or equal to ±100 μm.
10. Multifilament thread generating device for generating multifilament threads from a plastic melt by means of a spinning nozzle, wherein the multifilament thread generating device has a device for entangling multifilament threads according to any one of claims 1 to 5 and/or is operated by a method according to any one of claims 6 to 9.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019001447.2 | 2019-03-01 | ||
| DE102019001447 | 2019-03-01 |
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| Publication Number | Publication Date |
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| CN111636128A CN111636128A (en) | 2020-09-08 |
| CN111636128B true CN111636128B (en) | 2023-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010127135.XA Active CN111636128B (en) | 2019-03-01 | 2020-02-28 | Method and device for entangling synthetic multifilament threads |
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| Country | Link |
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| CN (1) | CN111636128B (en) |
| DE (1) | DE102020105230A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117552143B (en) * | 2024-01-12 | 2024-04-02 | 江苏欣战江纤维科技股份有限公司 | Air textured yarn machine |
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| GB2085040A (en) * | 1980-10-08 | 1982-04-21 | Du Pont | Making Coherent Yarn |
| JP2005213692A (en) * | 2004-01-30 | 2005-08-11 | Toray Ind Inc | Fluid interlacing treatment apparatus for filament yarn and method for producing interlaced filament yarn |
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| CN107699989A (en) * | 2017-09-22 | 2018-02-16 | 大庆天之草生物新材料科技有限公司 | The shredding unit and method of a kind of biological refined fiber |
| CN108588872A (en) * | 2018-07-26 | 2018-09-28 | 重庆昌宗机械有限公司 | Devillicate machine and chemical fiber monofilament production equipment |
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2020
- 2020-02-27 DE DE102020105230.8A patent/DE102020105230A1/en active Pending
- 2020-02-28 CN CN202010127135.XA patent/CN111636128B/en active Active
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|---|---|---|---|---|
| CH456835A (en) * | 1967-07-11 | 1968-05-31 | Schweizerische Viscose | Method for interlacing a running multifilament in places with the aid of a gas jet and multifilament interlaced in this way |
| GB2085040A (en) * | 1980-10-08 | 1982-04-21 | Du Pont | Making Coherent Yarn |
| JP2005213692A (en) * | 2004-01-30 | 2005-08-11 | Toray Ind Inc | Fluid interlacing treatment apparatus for filament yarn and method for producing interlaced filament yarn |
| CN1811025A (en) * | 2006-02-20 | 2006-08-02 | 湖南大学 | Continuous tow dispersing device |
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| Publication number | Publication date |
|---|---|
| DE102020105230A1 (en) | 2020-09-03 |
| CN111636128A (en) | 2020-09-08 |
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