EP2740821A1 - Air spinning machine - Google Patents

Air spinning machine Download PDF

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Publication number
EP2740821A1
EP2740821A1 EP13005379.6A EP13005379A EP2740821A1 EP 2740821 A1 EP2740821 A1 EP 2740821A1 EP 13005379 A EP13005379 A EP 13005379A EP 2740821 A1 EP2740821 A1 EP 2740821A1
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EP
European Patent Office
Prior art keywords
air
spinning
sliver
drafting
yarn
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Granted
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EP13005379.6A
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German (de)
French (fr)
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EP2740821B1 (en
Inventor
Thomas Weide
Chandrassekaran Seshayer
Roland Werner
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Saurer Spinning Solutions GmbH and Co KG
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Saurer Germany GmbH and Co KG
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Publication of EP2740821A1 publication Critical patent/EP2740821A1/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/11—Spinning by false-twisting
    • D01H1/115—Spinning by false-twisting using pneumatic means
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/28—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by inserting twist during drafting

Definitions

  • the invention relates to an air spinning device for producing a yarn, in which a sliver stretched by means of a drafting system, then fed to the air spinning unit to produce a Garnwindung, withdrawn from the air spinning unit and wound up on a cross-wound bobbin.
  • a sliver In air spinning, a sliver is distorted to final fineness at high overall distortions and high production speeds in a drafting system.
  • the sliver emerging between the exit rollers of the drafting system passes through a nozzle block to the inlet opening of a hollow spinning spindle.
  • the free fiber ends Upon entry of the sliver in the spinning spindle, the free fiber ends are wound around the conically shaped spindle head of the spinning spindle by means of a circulating air flow and wrap during retraction of the thread in the spindle spirally around the so-called core fibers.
  • the core fibers form together with the so-called Umwindefasern a new thread, which is subtracted, monitored by a yarn cleaner, optionally cleaned and wound up.
  • the drafting equipment mounted directly in front of the air-spinning unit is of particular importance. This leads to a refinement and a further parallelization of the fibers.
  • the aim is to produce as uniform a sliver as possible in order to be able to spin a yarn that is as uniform as possible.
  • a drafting system usually several consecutive pairs of rollers are arranged. Each of these roller pairs consists of a lower roller and an upper pressure roller. The sliver is transported through the pairs of rollers to the air spinning unit. Since the peripheral speeds of the roller pairs increase in the direction of fiber travel, the so-called distortion occurs. Viewed in the fiber direction, the last two pairs of rollers form the main draft zone; the section in front of it the Vorverzugszone.
  • drafting systems are equipped with one or two Vorverzugszone (s), which are accordingly referred to as three-roller drafting respectively four-roller drafting.
  • Quality fluctuations in the sliver can no longer be compensated for after the drafting system and can be found again as quality fluctuations in the yarn.
  • even slight negative influences on the drafting process such as the air flow produced by the rotational speed of the drafting system exit rollers, distract individual fibers from the fiber sliver, in some cases even leaching out and thereby impairing the yarn quality. This deterioration increases disproportionately with an increase in the spinning speed.
  • the DE 10 2005 022 186 A1 describes a method for producing an air-spun yarn, in which an already provided with low rotation Flyerlunte the drafting system is presented.
  • a slight false twist can be given by a specific arrangement of the output rollers of the drafting of the Flyerlunte in the main drafting zone.
  • a spinning machine in which a false twist device consisting of two hollow rollers is arranged in the direction of fiber flow after the spinning unit. The rotation is here granted to the already finished spun yarn, thereby a solid, uniform spun yarn with low hairiness can be spun.
  • the DE 20 42 387 A1 describes an apparatus and a method for producing a staple fiber yarn having a torsional structure over the entire cross section.
  • a Flyerlunte has been warped to final Garnfech, there is a uniform and continuous rotation distribution by means of a twist organ.
  • Characteristic here is that the rotation is carried out in a negative draft zone, which is arranged in the direction of fiber travel after the known drafting with exclusively positive default.
  • the yarn produced in this way has process-typical "corkscrews"; This phenomenon arises after the rotation, since turn up some fiber groups while others contract. To eliminate this, another, so-called Nachstrecklui can be followed.
  • EP 1 853 755 B1 discloses a flyless spinning process and a drafting apparatus to produce fine to very fine yarns of less than 10 tex without the use of a flyer.
  • a first drafting system which is usually arranged in the spinning preparation, a thin sliver of less than 2.5 ktex is produced.
  • This sliver is granted according to the invention a protective rotation of five or more rotations per meter to prevent it during transport and during further processing to Albertvermann when pulling the sliver in the second drafting or air-jet unit.
  • the object of the present invention is to propose a device which minimizes the fiber deflection, in particular due to the air flow, due to the rotational speeds of the drafting system exit rollers.
  • the drafting a false twist member is arranged, which grants rotations with alternating direction of rotation of the sliver before it warped in the main drafting zone on yarn count and the air-spinning unit is supplied. Due to the constant change in the direction of execution, there are sections of rotations that run into the main drafting zone and lead to the desired improvement. The rotation makes the sliver more compact and edge fibers are integrated into the center. This prevents that individual fibers are deflected by the air flow in front of the nip of the pair of output rollers from the sliver. As a result, there is an improvement in yarn uniformity.
  • the drafting system in front of the spinning unit is a four-roller drafting system.
  • the desired homogenization and thus the parallel position of the fibers becomes all the more precise, the more draft zones the drafting system has. In this way, the sliver is warped even more graded.
  • the false twist member is arranged in the second pre-draft zone.
  • the advantage of such an arrangement is that the sliver has already been refined by the first pre-drawn zone, so that more rotations can be applied, which are limited only by the fact that the large distortion in the main draft zone is not hindered.
  • the object of the invention to "capture" the edge fibers is already achieved by a small number of rotations.
  • the false twist member is a spin tube.
  • the spin tube changes constantly in left and right rotation about its longitudinal axis and thus transmits the alternating rotations on the sliver.
  • Claim 5 describes that the false twist member is a pneumatically actuated nozzle. Due to the corresponding arrangement and admission of air to the air nozzles in the passageway, the sliver is also given alternating rotations about its longitudinal axis, whereby mechanically moving parts are avoided.
  • the invention is not limited to a particular twisting device.
  • FIG. 1 schematically shows a front view of an air-spinning machine 1.
  • These textile machines have a plurality of in series juxtaposed work or spinning stations 2, which are positioned between the end arranged so-called end racks 15, 16.
  • each of the jobs 2 with a template material for example, a stored in a sliver can 3 sliver 4, equipped.
  • each of the jobs 2 has a drafting 5, an air-spinning device 6, a thread take-off device 7, a yarn cleaner 8 and a take-up device.
  • the associated thread-changing device 9 ensures that the yarn 10 produced in the air-spinning unit 6 from the sliver 4 is wound in intersecting layers onto a package 11.
  • This package reel or cross-wound bobbin 11 is, as usual, held in a coil frame, not shown, and is rotated by a coil drive, also not shown.
  • the jobs 2 of the textile machine 1 are preferably supplied by an automatically operating control unit 12, which, guided on rails 13, 14, along the work stations 2 is movable.
  • FIG. 2 shows a drafting system 5 with downstream Lucasspinnaggregat 6 and the passage of the sliver 4.
  • the withdrawn from the sliver can 3 sliver 4 is drawn from the feed rollers arranged as a pair of upper and lower rollers 31, 32 and by means of the upper and lower rollers 33, 34; 35, 36; 39, 40 stretched.
  • the upper and lower rollers 35, 36 cooperate with the straps 37, 38.
  • the upper and lower rollers 39, 40 are arranged as output rollers.
  • the false twist member 41 is arranged after the upper and lower rollers 33, 34 according to the invention.
  • a nozzle device 42 On the input side of the spinning unit 6, a nozzle device 42 is arranged.
  • the nozzles 43, 44 are connected via the line 45 to a compressed air source 46.
  • the air flowing out of the nozzles 43, 44 generates a rotational flow, with which the stretched sliver 4 is acted upon.
  • This is followed by a hollow spinning cone 47 connects.
  • the yarn 10 formed in the interaction of the nozzle device 42 and spinning cone 47 is withdrawn from the spinning unit 6 through the hollow spinning cone 47.
  • the air chamber 48 surrounding the spinning cone 47 is connected to a vacuum source 50 by means of a further line 49. Further details of the spinning process by means of such spinning devices are for example the DE 199 26 492 A1 removable.
  • the sliver 4 is through the pairs of rollers 31, 32; 33, 34; 35, 36; 39,40 transported to the air-spinning unit, wherein the peripheral speeds of the roller pairs increase in the direction of fiber travel.
  • the sliver is warped 2 to 4 times.
  • the sliver 4 is further warped and obtained by the false twist member 41 also an alternating rotation.
  • the sliver 4 receives its final fineness, which corresponds to the yarn count.
  • the upper and lower rollers 39, 40 which are arranged as output rollers, induce an air flow directed at the gusset 54. This airflow can not pass the nip point between the upper and lower rollers 39, 40, and therefore flows to the sides of the upper and lower rollers 39, 40.
  • the pre-stretched sliver 4 reaching into the main draft zone 53 has an alternating rotation according to the invention.
  • the fiber-to-fiber adhesion and thus also the tensile force in the sliver 4 remain large enough to keep the number of fibers blown by the air to the sides of the upper and lower rollers 39, 40 low.
  • these fibers are also fed into the spinning process, resulting in a high quality, air-spun yarn with less hairiness and improved uniformity.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)

Abstract

The air spinning device has a fiber belt (4) which is stretched by a stretching unit (5) and is supplied to an air spinning equipment (6) for generating a yarn twist, where the fiber belt is withdrawn from the air spinning equipment and is wound onto a cross-wound bobbin. A false twisting unit (41) is arranged in a pre-drafting zone of the stretching unit. The false twisting unit is granted with alternating direction of rotation of the fiber belt, before it is moved in the main drafting zone on yarn count and is supplied to the air spinning equipment.

Description

Die Erfindung betrifft eine Luftspinnvorrichtung zur Herstellung eines Garnes, in der ein Faserband mittels eines Streckwerks verstreckt, dann dem Luftspinnaggregat zur Erzeugung einer Garndrehung zugeführt, aus dem Luftspinnaggregat abgezogen und auf eine Kreuzspule aufgewunden wird.The invention relates to an air spinning device for producing a yarn, in which a sliver stretched by means of a drafting system, then fed to the air spinning unit to produce a Garndrehung, withdrawn from the air spinning unit and wound up on a cross-wound bobbin.

Die konventionellen und am Markt etablierten Spinnverfahren wie Ring-, Verdichtungs- und Rotorspinnen haben bezüglich ihrer Produktivität ihre verfahrensspezifischen Grenzen nahezu erreicht. Durch den Einsatz von Luft im eigentlichen Spinnprozess sollen vor allem die mechanischen Komponenten für die Drehungserteilung eliminiert und durch pneumatische Mittel ersetzt werden.The conventional and established on the market spinning processes such as ring, compacting and rotor spinning have almost reached their procedural limits in terms of their productivity. Through the use of air in the actual spinning process, it is above all the mechanical components for the rotation distribution that are to be eliminated and replaced by pneumatic means.

Beim Luftspinnen wird in einem Streckwerk ein Faserband bei hohen Gesamtverzügen und hohen Produktionsgeschwindigkeiten auf Endfeinheit verzogen. Das zwischen den Ausgangswalzen des Streckwerks austretende Faserband gelangt durch einen Düsenblock zur Einlassöffnung einer hohlen Spinnspindel. Beim Eintreten des Faserbandes in die Spinnspindel werden die freien Faserenden mittels eines umlaufenden Luftstroms um den kegelig ausgebildeten Spindelkopf der Spinnspindel geschlungen und wickeln sich während des Einziehens des Fadens in die Spindel spiralförmig um die so genannten Kernfasern. Die Kernfasern bilden gemeinsam mit den so genannten Umwindefasern einen neuen Faden, der abgezogen, durch einen Garnreiniger überwacht, gegebenenfalls gereinigt und aufgewickelt wird.In air spinning, a sliver is distorted to final fineness at high overall distortions and high production speeds in a drafting system. The sliver emerging between the exit rollers of the drafting system passes through a nozzle block to the inlet opening of a hollow spinning spindle. Upon entry of the sliver in the spinning spindle, the free fiber ends are wound around the conically shaped spindle head of the spinning spindle by means of a circulating air flow and wrap during retraction of the thread in the spindle spirally around the so-called core fibers. The core fibers form together with the so-called Umwindefasern a new thread, which is subtracted, monitored by a yarn cleaner, optionally cleaned and wound up.

Um ein qualitativ hochwertiges, luftgesponnenes Garn herstellen zu können, kommt dem unmittelbar vor dem Luftspinnaggregat gelagerten Streckwerk eine besondere Bedeutung zu. Dabei kommt es zu einer Verfeinerung und einem weiteren Parallelisieren der Fasern. Ziel ist es, ein möglichst gleichmäßiges Faserband herzustellen, um daraus ein möglichst gleichmäßiges Garn spinnen zu können.In order to be able to produce a high-quality, air-spun yarn, the drafting equipment mounted directly in front of the air-spinning unit is of particular importance. This leads to a refinement and a further parallelization of the fibers. The aim is to produce as uniform a sliver as possible in order to be able to spin a yarn that is as uniform as possible.

In einem Streckwerk sind üblicherweise mehrere hintereinanderliegende Walzenpaare angeordnet. Jedes dieser Walzenpaare besteht aus einer Unterwalze und einer oberen Druckwalze. Das Faserband wird durch die Walzenpaare zum Luftspinnaggregat transportiert. Da die Umfangsgeschwindigkeiten der Walzenpaare in Faserlaufrichtung zunehmen, entsteht der so genannte Verzug. In Faserlaufrichtung betrachtet bilden die letzten beiden Walzenpaare die Hauptverzugszone; der Abschnitt davor die Vorverzugszone. Üblicherweise sind Streckwerke mit einer oder zwei Vorverzugszone(n) ausgestattet, die dementsprechend als Dreiwalzen-Streckwerk respektive Vierwalzen-Streckwerk bezeichnet werden.In a drafting system usually several consecutive pairs of rollers are arranged. Each of these roller pairs consists of a lower roller and an upper pressure roller. The sliver is transported through the pairs of rollers to the air spinning unit. Since the peripheral speeds of the roller pairs increase in the direction of fiber travel, the so-called distortion occurs. Viewed in the fiber direction, the last two pairs of rollers form the main draft zone; the section in front of it the Vorverzugszone. Usually drafting systems are equipped with one or two Vorverzugszone (s), which are accordingly referred to as three-roller drafting respectively four-roller drafting.

Qualitätsschwankungen im Faserband können nach dem Streckwerk nicht mehr ausgeglichen werden und finden sich als Qualitätsschwankungen im Garn wieder. Hinzu kommt, dass bereits geringe negative Einflüsse auf den Verzugsvorgang, wie beispielsweise die durch die Rotationsgeschwindigkeit der Streckwerksausgangswalzen entstehende Luftströmung, einzelne Fasern aus dem Faserband ablenken, teilweise sogar herauslösen und dadurch die Garnqualität beeinträchtigen. Diese Verschlechterung nimmt überproportional mit einer Erhöhung der Spinngeschwindigkeit zu.Quality fluctuations in the sliver can no longer be compensated for after the drafting system and can be found again as quality fluctuations in the yarn. In addition, even slight negative influences on the drafting process, such as the air flow produced by the rotational speed of the drafting system exit rollers, distract individual fibers from the fiber sliver, in some cases even leaching out and thereby impairing the yarn quality. This deterioration increases disproportionately with an increase in the spinning speed.

Die DE 10 2005 022 186 A1 beschreibt ein Verfahren zum Herstellen eines luftgesponnenen Fadens, bei dem eine bereits mit geringer Drehung versehene Flyerlunte dem Streckwerk vorgelegt wird. Zusätzlich kann durch eine spezifische Anordnung der Ausgangswalzen des Streckwerks der Flyerlunte in der Hauptverzugszone ein leichter Falschdrall erteilt werden.The DE 10 2005 022 186 A1 describes a method for producing an air-spun yarn, in which an already provided with low rotation Flyerlunte the drafting system is presented. In addition, a slight false twist can be given by a specific arrangement of the output rollers of the drafting of the Flyerlunte in the main drafting zone.

In der DE 195 26 048 A1 ist eine Spinnmaschine offengelegt, in der in Faserlaufrichtung nach dem Spinnaggregat eine Falschdrallvorrichtung bestehend aus zwei hohlen Walzen angeordnet ist. Die Drehung wird hier dem bereits fertig ausgesponnenen Faden erteilt, dadurch soll ein festes, gleichmäßiges Spinnfasergarn mit geringer Haarigkeit gesponnen werden können.In the DE 195 26 048 A1 a spinning machine is disclosed in which a false twist device consisting of two hollow rollers is arranged in the direction of fiber flow after the spinning unit. The rotation is here granted to the already finished spun yarn, thereby a solid, uniform spun yarn with low hairiness can be spun.

Die DE 20 42 387 A1 schildert eine Vorrichtung und ein Verfahren zur Herstellung eines Stapelfasergarns, das über den gesamten Querschnitt eine Drehungsstruktur aufweist. Nachdem eine Flyerlunte auf endgültige Garnfeinheit verzogen wurde, erfolgt eine einheitliche und kontinuierliche Drehungserteilung mittels eines Drallorgans. Kennzeichnend hierbei ist, dass die Drehungserteilung in einer negativen Verzugszone erfolgt, die in Faserlaufrichtung nach dem bekannten Streckwerk mit ausschließlich positivem Verzug angeordnet ist. Das so hergestellte Garn weist verfahrenstypische "Korkenzieher" auf; dieses Phänomen entsteht nach der Drehungserteilung, da sich einige Fasergruppen aufdrehen, während andere sich zusammenziehen. Um dies zu eliminieren, kann ein weiterer, so genannter Nachstreckprozess nachgeschaltet werden.The DE 20 42 387 A1 describes an apparatus and a method for producing a staple fiber yarn having a torsional structure over the entire cross section. After a Flyerlunte has been warped to final Garnfeinheit, there is a uniform and continuous rotation distribution by means of a twist organ. Characteristic here is that the rotation is carried out in a negative draft zone, which is arranged in the direction of fiber travel after the known drafting with exclusively positive default. The yarn produced in this way has process-typical "corkscrews"; This phenomenon arises after the rotation, since turn up some fiber groups while others contract. To eliminate this, another, so-called Nachstreckprozess can be followed.

In der EP 1 853 755 B1 wird ein flyerloses Spinnverfahren sowie eine Vorrichtung mit einem Streckwerk offenbart, um feine, bis sehr feine Garne von weniger als 10 tex ohne den Einsatz eines Flyers herstellen zu können. Mittels eines ersten Streckwerks, das üblicherweise in der Spinnerei-Vorbereitung angeordnet ist, wird ein dünnes Faserband von weniger als 2,5 ktex produziert. Diesem Faserband wird erfindungsgemäß eine Schutzdrehung von fünf oder mehr Drehungen pro Meter erteilt, um zu verhindern, dass es beim Transport und während der Weiterverarbeitung zu Fehlverzügen beim Einziehen des Faserbandes in das zweite Streckwerk oder dem Luftspinnaggregat kommt.In the EP 1 853 755 B1 discloses a flyless spinning process and a drafting apparatus to produce fine to very fine yarns of less than 10 tex without the use of a flyer. By means of a first drafting system, which is usually arranged in the spinning preparation, a thin sliver of less than 2.5 ktex is produced. This sliver is granted according to the invention a protective rotation of five or more rotations per meter to prevent it during transport and during further processing to Fehlverzügen when pulling the sliver in the second drafting or air-jet unit.

Als nachteilig an den Vorrichtungen und Verfahren gemäß dem Stand der Technik erweist sich folgendes:

  • Die DE 10 2005 022 186 A1 beschreibt eine Anordnung der Ausgangswalzen zueinander, bei der das Ausgangswalzenpaar extrem schnell verschleißt. Zudem können durch diese Anordnung ausschließlich einheitliche Drehungen erteilt werden. Sowohl gemäß der DE 195 26 048 A1 als auch der DE 20 42 387 A1 erfolgt die Drehungserteilung erst, nachdem das Faserband bereits auf endgültige Garnfeinheit verzogen ist. Dadurch wird das Problem der abgelenkten und teilweise herausgelösten Fasern aus dem Faserband nicht zufriedenstellend gelöst.
A disadvantage of the devices and methods according to the prior art proves the following:
  • The DE 10 2005 022 186 A1 describes an arrangement of the output rollers to each other, in which the pair of output rollers wears extremely fast. In addition, only uniform rotations can be granted by this arrangement. Both according to the DE 195 26 048 A1 as well as the DE 20 42 387 A1 the rotation is only after the sliver is already warped to final Garnfeinheit. This does not satisfactorily solve the problem of deflected and partially released fibers from the sliver.

Aufgabe der vorliegenden Erfindung ist es, eine Vorrichtung vorzuschlagen, die die insbesondere durch die Luftströmung aufgrund der Rotationsgeschwindigkeiten der Streckwerksausgangswalzen entstehende Faserablenkung minimiert.The object of the present invention is to propose a device which minimizes the fiber deflection, in particular due to the air flow, due to the rotational speeds of the drafting system exit rollers.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des 1 Anspruchs gelöst.This object is achieved by the characterizing features of claim 1.

Vorteilhafte Ausgestaltungen der Erfindung sind Gegenstand der Unteransprüche.Advantageous embodiments of the invention are the subject of the dependent claims.

Gemäß Anspruch 1 ist vorgesehen, dass in einer Vorverzugszone des Streckwerks ein Falschdrallorgan angeordnet ist, welches mit alternierender Drehrichtung dem Faserband Drehungen erteilt, bevor es in der Hauptverzugszone auf Garnfeinheit verzogen und dem Luftspinnaggregat zugeführt wird. Durch den ständigen Wechsel der Derhungsrichtung kommt es abschnittsweise zu Drehungen, die in die Hauptverzugszone einlaufen und zu der angestrebten Verbesserung führen. Durch die Drehung wird das Faserband kompakter und Randfasern werden in die Mitte mit eingebunden. Dadurch wird verhindert, dass einzelne Fasern durch die Luftströmung vor dem Klemmspalt des Ausgangswalzenpaares aus dem Faserband abgelenkt werden. Infolgedessen kommt es zu einer Verbesserung der Garngleichmäßigkeit.According to claim 1 it is provided that in a Vorverzugszone the drafting a false twist member is arranged, which grants rotations with alternating direction of rotation of the sliver before it warped in the main drafting zone on yarn count and the air-spinning unit is supplied. Due to the constant change in the direction of execution, there are sections of rotations that run into the main drafting zone and lead to the desired improvement. The rotation makes the sliver more compact and edge fibers are integrated into the center. This prevents that individual fibers are deflected by the air flow in front of the nip of the pair of output rollers from the sliver. As a result, there is an improvement in yarn uniformity.

Vorteilhafterweise ist gemäß Anspruch 2 das Streckwerk vor dem Spinnaggregat ein Vierwalzen-Streckwerk. Die gewünschte Vergleichmäßigung und somit die Parallellage der Fasern wird umso präziser, je mehr Verzugszonen das Streckwerk aufweist. Auf diese Weise wird das Faserband noch abgestufter verzogen.Advantageously, according to claim 2, the drafting system in front of the spinning unit is a four-roller drafting system. The desired homogenization and thus the parallel position of the fibers becomes all the more precise, the more draft zones the drafting system has. In this way, the sliver is warped even more graded.

Wie im Anspruch 3 dargelegt, ist das Falschdrallorgan in der zweiten Vorverzugszone angeordnet. Vorteil einer solchen Anordnung ist, dass das Faserband schon durch die erste Vorverzugszone verfeinert wurde, so dass mehr Drehungen aufgebracht werden können, die nur dadurch begrenzt sind, dass der starke Verzug in der Hauptverzugszone nicht behindert wird. Das Ziel der Erfindung, die Randfasern "einzufangen", wird durch eine geringe Zahl von Drehungen bereits erreicht.As stated in claim 3, the false twist member is arranged in the second pre-draft zone. The advantage of such an arrangement is that the sliver has already been refined by the first pre-drawn zone, so that more rotations can be applied, which are limited only by the fact that the large distortion in the main draft zone is not hindered. The object of the invention to "capture" the edge fibers is already achieved by a small number of rotations.

Vorzugsweise ist, wie in Anspruch 4 beschrieben, das Falschdrallorgan ein Drehungsröhrchen. Das Drehungsröhrchen wechselt ständig in Links- und Rechtsdrehung um seine Längsachse und überträgt so die alternierenden Drehungen auf das Faserband.Preferably, as described in claim 4, the false twist member is a spin tube. The spin tube changes constantly in left and right rotation about its longitudinal axis and thus transmits the alternating rotations on the sliver.

Anspruch 5 beschreibt, dass das Falschdrallorgan eine pneumatisch beaufschlagbare Düse ist. Durch die entsprechende Anordnung und Beaufschlagung mit Luft der Luftdüsen im Durchtrittskanal werden dem Faserband auch dadurch alternierende Drehungen um seine Längsachse erteilt, wobei mechanisch bewegte Teile vermieden werden.Claim 5 describes that the false twist member is a pneumatically actuated nozzle. Due to the corresponding arrangement and admission of air to the air nozzles in the passageway, the sliver is also given alternating rotations about its longitudinal axis, whereby mechanically moving parts are avoided.

Die Erfindung ist nicht auf ein bestimmtes Drallorgan beschränkt.The invention is not limited to a particular twisting device.

Die vorliegende Erfindung wird nachfolgend anhand einer schematisiert dargestellten Arbeitsstelle einer Luftspinnmaschine erläutert.The present invention is explained below with reference to a schematically illustrated workstation of an air spinning machine.

Es zeigen:

Figur 1
in Vorderansicht eine mit Luftspinnvorrichtungen ausgestattete Textilmaschine
Figur 2
eine Spinnvorrichtung einer Spinnstelle der Luftspinnmaschine der Figur 1, teilweise im Schnitt und stark vereinfacht.
Show it:
FIG. 1
in front view of a equipped with air spinning textile machine
FIG. 2
a spinning device of a spinning station of the air spinning machine of FIG. 1 , partly in section and greatly simplified.

Die Figur 1 zeigt schematisch in Vorderansicht eine Luftspinnmaschine 1. Diese Textilmaschinen weisen eine Vielzahl von in Reihe nebeneinander angeordneten Arbeits- oder Spinnstellen 2 auf, die zwischen endseitig angeordneten so genannten Endgestellen 15, 16 positioniert sind.The FIG. 1 schematically shows a front view of an air-spinning machine 1. These textile machines have a plurality of in series juxtaposed work or spinning stations 2, which are positioned between the end arranged so-called end racks 15, 16.

Wie in Figur 1 weiter angedeutet, ist jede der Arbeitsstellen 2 mit einem Vorlagematerial, beispielsweise ein in einer Spinnkanne 3 abgelegtes Faserband 4, ausgestattet.As in FIG. 1 further indicated, each of the jobs 2 with a template material, for example, a stored in a sliver can 3 sliver 4, equipped.

Außerdem verfügt jede der Arbeitsstellen 2 über ein Streckwerk 5, eine Luftspinnvorrichtung 6, eine Fadenabzugseinrichtung 7, einen Garnreiniger 8 sowie über eine Aufwickeleinrichtung.In addition, each of the jobs 2 has a drafting 5, an air-spinning device 6, a thread take-off device 7, a yarn cleaner 8 and a take-up device.

Die zugehörige Fadenchangiereinrichtung 9 sorgt dafür, dass das in dem Luftspinnaggregat 6 aus dem Faserband 4 gefertigte Garn 10 in sich kreuzenden Lagen auf eine Auflaufspule 11 gewickelt wird.The associated thread-changing device 9 ensures that the yarn 10 produced in the air-spinning unit 6 from the sliver 4 is wound in intersecting layers onto a package 11.

Diese Auflaufspule respektive Kreuzspule 11 ist, wie üblich, in einem nicht dargestellten Spulenrahmen gehalten und wird durch einen ebenfalls nicht dargestellten Spulenantrieb rotiert.This package reel or cross-wound bobbin 11 is, as usual, held in a coil frame, not shown, and is rotated by a coil drive, also not shown.

Wie in Figur 1 weiter angedeutet, werden die Arbeitsstellen 2 der Textilmaschine 1 vorzugsweise durch ein selbsttätig arbeitendes Bedienaggregat 12 versorgt, das, auf Schienen 13, 14 geführt, entlang der Arbeitsstellen 2 verfahrbar ist.As in FIG. 1 further indicated, the jobs 2 of the textile machine 1 are preferably supplied by an automatically operating control unit 12, which, guided on rails 13, 14, along the work stations 2 is movable.

Figur 2 zeigt ein Streckwerk 5 mit nachgeordnetem Luftspinnaggregat 6 und dem Durchlauf des Faserbandes 4. Das aus der Spinnkanne 3 abgezogene Faserband 4 wird von den als Einzugswalzenpaar angeordneten Ober- und Unterwalzen 31, 32 eingezogen und mittels der Ober- und Unterwalzen 33, 34; 35, 36; 39, 40 verstreckt. FIG. 2 shows a drafting system 5 with downstream Luftspinnaggregat 6 and the passage of the sliver 4. The withdrawn from the sliver can 3 sliver 4 is drawn from the feed rollers arranged as a pair of upper and lower rollers 31, 32 and by means of the upper and lower rollers 33, 34; 35, 36; 39, 40 stretched.

Die Ober- und Unterwalzen 35, 36 wirken mit den Riemchen 37, 38 zusammen. Die Ober- und Unterwalzen 39, 40 sind als Ausgangswalzen angeordnet. Nach den Ober- und Unterwalzen 33, 34 ist erfindungsgemäß das Falschdrallorgan 41 angeordnet.The upper and lower rollers 35, 36 cooperate with the straps 37, 38. The upper and lower rollers 39, 40 are arranged as output rollers. After the upper and lower rollers 33, 34 according to the invention, the false twist member 41 is arranged.

Eingangsseitig des Spinnaggregats 6 ist eine Düseneinrichtung 42 angeordnet. Die Düsen 43, 44 sind über die Leitung 45 mit einer Druckluftquelle 46 verbunden. Die aus den Düsen 43, 44 ausströmende Luft erzeugt eine Rotationsströmung, mit der das verstreckte Faserband 4 beaufschlagt wird. Daran schließt sich ein hohler Spinnkonus 47 an. Das im Zusammenwirken von Düseneinrichtung 42 und Spinnkonus 47 gebildete Garn 10 wird durch den hohlen Spinnkonus 47 aus dem Spinnaggregat 6 abgezogen. Die den Spinnkonus 47 umgebende Luftkammer 48 ist mittels einer weiteren Leitung 49 mit einer Unterdruckquelle 50 verbunden. Weitere Einzelheiten zum Spinnvorgang mittels derartiger Spinnvorrichtungen sind beispielsweise der DE 199 26 492 A1 entnehmbar.On the input side of the spinning unit 6, a nozzle device 42 is arranged. The nozzles 43, 44 are connected via the line 45 to a compressed air source 46. The air flowing out of the nozzles 43, 44 generates a rotational flow, with which the stretched sliver 4 is acted upon. This is followed by a hollow spinning cone 47 connects. The yarn 10 formed in the interaction of the nozzle device 42 and spinning cone 47 is withdrawn from the spinning unit 6 through the hollow spinning cone 47. The air chamber 48 surrounding the spinning cone 47 is connected to a vacuum source 50 by means of a further line 49. Further details of the spinning process by means of such spinning devices are for example the DE 199 26 492 A1 removable.

Das Faserband 4 wird durch die Walzenpaare 31, 32; 33, 34; 35, 36; 39,40 zum Luftspinnaggregat transportiert, wobei die Umfangsgeschwindigkeiten der Walzenpaare in Faserlaufrichtung zunehmen. In der ersten Vorverzugszone 51 wird das Faserband 2 bis 4fach verzogen. In der zweiten Vorverzugszone 52 wird das Faserband 4 weiter verzogen und erhält durch das Falschdrallorgan 41 zudem eine alternierende Drehung. In der Hauptverzugszone 53 erhält das Faserband 4 seine Endfeinheit, die der Garnfeinheit entspricht. Die als Ausgangswalzen angeordneten Ober- und Unterwalzen 39, 40 induzieren eine auf den Zwickel 54 gerichtete Luftströmung. Diese Luftströmung kann den Klemmpunkt zwischen den Ober- und Unterwalzen 39, 40 nicht passieren und strömt daher zu den Seiten der Ober- und Unterwalzen 39, 40.The sliver 4 is through the pairs of rollers 31, 32; 33, 34; 35, 36; 39,40 transported to the air-spinning unit, wherein the peripheral speeds of the roller pairs increase in the direction of fiber travel. In the first pre-drawn zone 51, the sliver is warped 2 to 4 times. In the second Vorverzugszone 52, the sliver 4 is further warped and obtained by the false twist member 41 also an alternating rotation. In the main draft zone 53, the sliver 4 receives its final fineness, which corresponds to the yarn count. The upper and lower rollers 39, 40, which are arranged as output rollers, induce an air flow directed at the gusset 54. This airflow can not pass the nip point between the upper and lower rollers 39, 40, and therefore flows to the sides of the upper and lower rollers 39, 40.

Das in die Hauptverzugszone 53 gelangende, vorverstreckte Faserband 4 weist erfindungsgemäß eine wechselnde Drehung auf. Dadurch bleibt die Faser-Faser-Haftung und damit ebenfalls die Zugkraft im Faserband 4 groß genug, um die Anzahl der Fasern, die von der Luft zu den Seiten der Ober- und Unterwalzen 39, 40 geblasen wird, gering zu halten. Dadurch werden diese Fasern ebenfalls dem Spinnprozess zugeführt und es entsteht ein qualitativ hochwertiges, luftgesponnenes Garn mit einer geringeren Haarigkeit und einer verbesserten Gleichmäßigkeit.The pre-stretched sliver 4 reaching into the main draft zone 53 has an alternating rotation according to the invention. As a result, the fiber-to-fiber adhesion and thus also the tensile force in the sliver 4 remain large enough to keep the number of fibers blown by the air to the sides of the upper and lower rollers 39, 40 low. As a result, these fibers are also fed into the spinning process, resulting in a high quality, air-spun yarn with less hairiness and improved uniformity.

Claims (5)

Luftspinnvorrichtung zur Herstellung eines Garnes, in der ein Faserband mittels eines Streckwerks verstreckt, dann dem Luftspinnaggregat zur Erzeugung einer Garndrehung zugeführt, aus dem Luftspinnaggregat abgezogen und auf eine Kreuzspule aufgewunden wird,
dadurch gekennzeichnet, dass
in einer Vorverzugszone des Streckwerks ein Falschdrallorgan angeordnet ist, welches mit alternierender Drehrichtung dem Faserband Drehungen erteilt, bevor es in der Hauptverzugszone auf Garnfeinheit verzogen und dem Luftspinnaggregat zugeführt wird.Air-spinning device for producing a yarn, in which a sliver is stretched by means of a drafting device, then fed to the air-spinning unit to produce a yarn twist, withdrawn from the air-spinning unit and wound onto a cheese,
characterized in that
in a Vorverzugszone the drafting a false twist member is arranged, which grants rotations with alternating direction of rotation of the sliver before it is warped in the main drafting zone on yarn count and fed to the air-spinning unit. Luftspinnvorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das Streckwerk vor dem Spinnaggregat ein Vierwalzen-Streckwerk ist.Air-jet spinning device according to claim 1, characterized in that the drafting system in front of the spinning unit is a four-roller drafting system. Luftspinnvorrichtung nach Anspruch 2, dadurch gekennzeichnet, dass das Falschdrallorgan in der zweiten Vorverzugszone angeordnet ist.Air spinning device according to claim 2, characterized in that the false twist member is arranged in the second Vorverzugszone. Luftspinnvorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass das Falschdrallorgan ein Drehungsröhrchen ist.Air spinning device according to claim 3, characterized in that the false twist member is a rotation tube. Luftspinnvorrichtung nach Anspruch 3, dadurch gekennzeichnet, dass das Falschdrallorgan eine pneumatisch beaufschlagbare Düse ist.Air spinning device according to claim 3, characterized in that the false twist member is a pneumatically actuated nozzle.
EP13005379.6A 2012-12-07 2013-11-15 Air spinning machine Active EP2740821B1 (en)

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DE102012023985.8A DE102012023985A1 (en) 2012-12-07 2012-12-07 Air spinning device

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CN109402802A (en) * 2018-12-21 2019-03-01 苏州大学 False twist textured yarn production equipment and method based on double eddy-current techniques
JP2021025141A (en) * 2019-08-01 2021-02-22 村田機械株式会社 Spinning machine
CN112226861B (en) * 2020-09-21 2021-10-26 东华大学 Fire grass fiber collecting device
CN114197095B (en) * 2021-11-29 2023-03-24 武汉纺织大学 Twisting direction alternate twisting winding device and using method

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DE102012023985A1 (en) 2014-06-12
EP2740821B1 (en) 2016-08-31
CN103866439A (en) 2014-06-18
JP2014114535A (en) 2014-06-26
JP6207369B2 (en) 2017-10-04

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