EP3178975A1 - Method for producing elastic core yarn with a ring spinning machine - Google Patents

Method for producing elastic core yarn with a ring spinning machine Download PDF

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Publication number
EP3178975A1
EP3178975A1 EP16194507.6A EP16194507A EP3178975A1 EP 3178975 A1 EP3178975 A1 EP 3178975A1 EP 16194507 A EP16194507 A EP 16194507A EP 3178975 A1 EP3178975 A1 EP 3178975A1
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EP
European Patent Office
Prior art keywords
pair
rollers
peripheral speed
spinning
delivery
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Granted
Application number
EP16194507.6A
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German (de)
French (fr)
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EP3178975B1 (en
Inventor
Hans-Jürgen KÜSTER
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Maschinenfabrik Rieter AG
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Maschinenfabrik Rieter AG
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Publication of EP3178975A1 publication Critical patent/EP3178975A1/en
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Classifications

    • 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
    • D01H1/02—Spinning or twisting machines in which the product is wound-up continuously ring type
    • 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
    • D01H5/26—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by one or more endless aprons
    • 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
    • D01H1/14—Details
    • D01H1/20—Driving or stopping arrangements
    • D01H1/28—Driving or stopping arrangements for two or more machine elements possessing different characteristics but in operative association
    • D01H1/30—Driving or stopping arrangements for two or more machine elements possessing different characteristics but in operative association with two or more speeds; with variable-speed arrangements
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/10—Tension devices
    • D01H13/108—Regulating tension by regulating speed of driving mechanisms of unwinding, paying-out, forwarding, winding or depositing devices, e.g. automatically in response to variations in tension
    • 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
    • D01H5/32—Regulating or varying draft
    • 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
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/32—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic
    • D02G3/324—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic using a drawing frame
    • 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
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/36—Cored or coated yarns or threads

Definitions

  • the invention relates to a method and apparatus for producing elastic core yarn according to the preamble of the independent claims.
  • an endless thread is wound by staple fibers.
  • properties of a certain continuous filament can be transferred to a finished yarn and combined with the properties of the staple fibers used.
  • the continuous thread serves as the core of the finished yarn.
  • a shell of staple fibers is produced around this core during the spinning process. In this way it is possible to produce a cotton elastic thread.
  • the core used for this purpose is an elastic continuous thread, for example spandex, which is wound with cotton fibers.
  • EP1561845 a device in which a Corefaden a roving is supplied before the roving is solidified by rotation.
  • the core thread is fed to the roving before the roving passes through the pair of delivery rollers of the drafting system.
  • a drafting device of a ring spinning machine is fed with a fiber roving or a fiber structure.
  • the fiber structure When passing through the drafting system, which consists of several pairs of rollers, the fiber structure is warped by different speeds of the roller pairs. This warped fiber strand leaves the drafting system through a pair of outfeed rollers.
  • an elastic continuous thread is fed to the fiber structure.
  • the endless thread is unwound from a spool and transported via a delivery roller pair to the fiber structure.
  • the delivery roller pair is matched in its peripheral speed to the peripheral speed of the pair of output rollers in such a way that the endless thread is stretched between the delivery roller pair and the output roller pair.
  • the invention is therefore based on the object to provide a method and an apparatus for this, which allow a trouble-free separation of the spun elastic yarn in a bobbin change.
  • the peripheral speed of the delivery roller pair determines the speed at which the elastic filament is unwound from the spool.
  • the peripheral speed of the output roller pair of the drafting determines the speed with which the fiber structure is passed along with the elastic endless thread to the spinning device.
  • the ratio between these two speeds is matched in the operating case to the material used in the continuous filament.
  • the peripheral speed of the pair of outfeed rollers higher than the peripheral speed of the delivery roller pair and thus the said ratio considerably greater than 1.
  • the size of the ratio determines the elongation of the endless thread with which this leaves the pair of delivery rollers.
  • the endless thread is passed on to the spinning device with less elongation. Accordingly, the finished core yarn is also less elastic because the fibers spun around the continuous yarn itself do not allow stretching. The core yarn can only be stretched until the state is reached again, in which the fiber structure with the endless thread has passed through the spinning device. This results in a better separation behavior when removing the core yarn over a knife blade during automatic bobbin change.
  • the peripheral speed ratio between the pair of delivery rollers and the delivery roller pair is reduced to less than 3, preferably to between 1 to 2.5, more preferably to between 1 to 1.5. It is particularly advantageous if, during spinning, the circumferential speed ratio between the pair of delivery rollers and the delivery roller pair is reduced to one.
  • a core yarn is produced by the spinning device, which corresponds in spite of the use of an elastic endless thread as a core in its properties to a yarn which would be produced without an elastic continuous thread.
  • the same technical device can be used for the separation of the spun yarn in an automatic bobbin change, as in a staple fiber yarn, which was prepared without supplying an elastic core. Since the staple fibers converted into a yarn have a very limited elasticity, the yarn tears even at the smallest strains. An elastic core has no influence on this behavior if it has not been wound in a stretched state.
  • an apparatus for producing an elastic core yarn is provided with a drafting device for warping a fiber structure, wherein the drafting arrangement comprises a pair of output rollers, and a pair of delivery rollers for supplying an elastic Endlosfadens to the pair of output rollers is provided.
  • a ring spinning device is provided, wherein a circulation speed ratio between the pair of output rollers and the pair of delivery rollers during spinning is reduced.
  • the peripheral speed ratio between the pair of delivery rollers and the delivery roller pair is reduced to less than 3, preferably to between 1 to 2.5, more preferably to between 1 to 1.5. It is particularly advantageous if, during spinning, the circumferential speed ratio between the pair of delivery rollers and the delivery roller pair is reduced to one.
  • the two peripheral speeds are advantageously provided with an electronic or mechanical coupling.
  • a control is provided which makes it possible to adapt the peripheral speed of the delivery roller pair to a peripheral speed of the output roller pair which changes during spinning.
  • the drives of the delivery roller pair and the pair of output rollers are mechanically connected and when spinning in this connection, a switch can be made to reduce the peripheral speed ratio.
  • FIG. 1 shows a schematic representation of a spinning station for the production of elastic core yarn. Only the elements important to the invention are shown.
  • the drafting device comprises a drafting system 1 with a pair of output rollers 3.
  • the drafting system 1 is exemplified with an input roller pair 13 and a respectively looped 15 a medium roller pair 14.
  • the incoming into the drafting 1 fiber strand 2 is due to the different speeds of the roller pairs when passing through Drafting system 1 warped.
  • the Fiber structure 2 fed to a continuous elastic thread 8.
  • the feeding takes place via a delivery roller pair 9, which unwinds the endless thread 8 from a supply reel 10.
  • the fiber structure 2 and the endless thread 8 are guided via a yarn guide 4 to a rotor 5.
  • the rotor 4 rotates on a ring 6 about a rotating coil 7.
  • the handling speed of the delivery roller pair 9 is in a certain ratio to the peripheral speed of the output roller pair 3, which is determined in operation by the material used of the endless thread 8.
  • the peripheral speed ratio between the pair of output rollers 3 and the delivery roller pair 9 is reduced to less than 3, preferably to between 1 to 2.5, more preferably to between 1 and 1.5. It is particularly advantageous if, during spinning, the circumferential speed ratio between the pair of delivery rollers and the delivery roller pair is reduced to one.
  • a core yarn is produced by the spinning device, which corresponds in spite of the use of an elastic endless thread as a core in its properties to a yarn which would be produced without an elastic continuous thread.
  • the same technical device can be used for the separation of the spun yarn in an automatic bobbin change, as in a staple fiber yarn, which was prepared without supplying an elastic core. Since the staple fibers converted into a yarn have a very limited elasticity, the yarn tears even at the smallest strains. An elastic core has no influence on this behavior if it has not been wound in a stretched state.
  • the two peripheral speeds are provided with a coupling 16. This can be carried out electronically or mechanically. It is provided in an advantageous embodiment, a control, which makes it possible, the peripheral speed of the pair of delivery rollers to a changing during the spinning peripheral speed Adjust the output roller pair. However, it is also conceivable that the drives of the delivery roller pair and the pair of output rollers are connected and when spinning in this connection, a switch can be made to reduce the peripheral speed ratio.

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

Abstract

Die Erfindung bezieht sich auf ein Verfahren zur Herstellung von elastischem Coregarn mit einer Ringspinnmaschine, wobei einem Streckwerk (1) ein Faserverband (2) zugeführt wird, der Faserverband (2) beim Durchlaufen des Streckwerks (1) verzogen und durch das Ausgangswalzenpaar (3) das Streckwerk (1) verlässt, und über einen Fadenführer (4) zu einem Läufer (5) geführt und über den auf einem Ring (6) umlaufenden Läufer (5) auf eine sich drehende Spule (7) aufgewickelt wird. Dem Faserverband (2) wird beim Einlauf in das Ausgangswalzenpaar (3) ein elastischer Endlosfaden (8) über ein Lieferwalzenpaar (9) zugeführt wird, und in den Faserverband (2) eingesponnen wird. Erfindungsgemäss wird beim Abspinnen einer vollen Spule (7) das Umfangsgeschwindigkeitsverhältnis zwischen dem Ausgangswalzenpaar (3) und dem Lieferwalzenpaar (9) derart angepasst, dass die Dehnung des Endlosfadens (8) reduziert wird. Die Erfindung bezieht sich auch auf eine entsprechende Vorrichtung.The invention relates to a method for the production of elastic core yarn with a ring spinning machine, wherein a drafting system (1) a fiber structure (2) is fed, the fiber structure (2) when passing through the drafting system (1) warped and by the output roller pair (3) the drafting system (1) leaves, and via a yarn guide (4) to a rotor (5) and wound on the on a ring (6) rotating rotor (5) on a rotating spool (7) is wound. The fiber structure (2) is fed into the pair of outfeed rollers (3) by an elastic endless thread (8) via a delivery roller pair (9), and is spun into the fiber structure (2). According to the invention, when spinning a full bobbin (7), the peripheral speed ratio between the pair of output rollers (3) and the delivery roller pair (9) is adjusted so as to reduce the elongation of the endless thread (8). The invention also relates to a corresponding device.

Description

Technisches GebietTechnical area

Die Erfindung bezieht sich auf ein Verfahren und Vorrichtung zur Herstellung von elastischem Coregarn entsprechend dem Oberbegriff der unabhängigen Ansprüche.The invention relates to a method and apparatus for producing elastic core yarn according to the preamble of the independent claims.

Stand der TechnikState of the art

Bei der Herstellung von Coregarn wird ein Endlosfaden durch Stapelfasern umsponnen. Dadurch können Eigenschaften eines bestimmten Endlosfadens auf ein fertiges Garn übertragen und mit den Eigenschaften der verwendeten Stapelfasern kombiniert werden. Der Endlosfaden dient dabei als Kern des fertigen Garns. Um diesen Kern entsteht in der Folge im Spinnprozess eine Hülle aus Stapelfasern. Auf diese Art und Weise ist es möglich, einen elastischen Baumwollfaden herzustellen. Als Kern wird dazu ein elastischer Endlosfaden, beispielsweise Elastan, verwendet, welcher mit Baumwollfasern umsponnen wird.In the production of coregarn an endless thread is wound by staple fibers. As a result, properties of a certain continuous filament can be transferred to a finished yarn and combined with the properties of the staple fibers used. The continuous thread serves as the core of the finished yarn. As a result, a shell of staple fibers is produced around this core during the spinning process. In this way it is possible to produce a cotton elastic thread. The core used for this purpose is an elastic continuous thread, for example spandex, which is wound with cotton fibers.

Vorrichtungen und Verfahren zur Herstellung von Coregarn sind aus dem Stand der Technik bekannt, beispielsweise offenbart die EP1561845 eine Vorrichtung, bei welcher ein Corefaden einer Faserlunte zugeführt wird, bevor die Faserlunte durch Drehung verfestigt wird. Der Corefaden wird der Faserlunte zugeführt, bevor die Faserlunte das Ausgangswalzenpaar des Streckwerks passiert.Devices and methods for producing coregarn are known from the prior art, for example, discloses EP1561845 a device in which a Corefaden a roving is supplied before the roving is solidified by rotation. The core thread is fed to the roving before the roving passes through the pair of delivery rollers of the drafting system.

Einem Streckwerk einer Ringspinnmaschine wird eine Faserlunte bzw. ein Faserverband zugeführt. Beim Durchlaufen des Streckwerks, welches aus mehreren Walzenpaaren besteht, wird der Faserverband durch unterschiedliche Geschwindigkeiten der Walzenpaare verzogen. Dieser verzogene Faserverband verlässt das Streckwerk durch ein Ausgangswalzenpaar. Vor dem Verlassen des Ausgangswalzenpaars wird dem Faserverband ein elastischer Endlosfaden zugeführt. Der Endlosfaden wird dabei von einer Spule abgespult und über ein Lieferwalzenpaar zum Faserverband transportiert. Das Lieferwalzenpaar ist in seiner Umfangsgeschwindigkeit derart auf die Umfangsgeschwindigkeit des Ausgangswalzenpaars abgestimmt, dass der Endlosfaden zwischen dem Lieferwalzenpaar und dem Ausgangswalzenpaar gedehnt wird. In der Folge verlassen der Faserverband und der gedehnte Endlosfaden das Ausgangswalzenpaar und werden über einen Fadenführer zu einem Läufer geführt und über den auf einem Ring umlaufenden Läufer auf eine sich drehende Spule aufgewickelt. Durch die Wirkung von Läufer und Spindel wird der Endlosfaden in den Faserverband eingesponnen und der Faserverband mit dem gedehnten Endlosfaden zu einem elastischen Garn umgebildet.A drafting device of a ring spinning machine is fed with a fiber roving or a fiber structure. When passing through the drafting system, which consists of several pairs of rollers, the fiber structure is warped by different speeds of the roller pairs. This warped fiber strand leaves the drafting system through a pair of outfeed rollers. Before leaving the pair of delivery rollers, an elastic continuous thread is fed to the fiber structure. The endless thread is unwound from a spool and transported via a delivery roller pair to the fiber structure. The delivery roller pair is matched in its peripheral speed to the peripheral speed of the pair of output rollers in such a way that the endless thread is stretched between the delivery roller pair and the output roller pair. Leave in the episode the fiber structure and the stretched endless thread the pair of output rollers and are guided over a yarn guide to a runner and wound on the revolving on a ring rotor on a rotating spool. Due to the effect of the rotor and the spindle, the endless thread is spun into the fiber structure and the fiber structure with the stretched endless thread is converted into an elastic yarn.

Es hat sich nun gezeigt, dass auf Ringspinnmaschinen, bei welchen ein Spulenwechsel automatisch vorgenommen wird, eine zuverlässige Trennung des auf die Spule aufgewickelten Garnes nicht möglich ist, bedingt durch die Elastizität des gesponnen Garns. Die automatische Vorrichtung für den Spulenwechsel trennt das Garn dadurch, dass die Spule von der Spindel abgezogen und dabei das Garn über eine Messerkante gezogen wird. Bei einem elastischen Garn wird jedoch das Garn in die Länge gezogen und durch das Messer nicht zuverlässig getrennt. Die führt regelmässig zu Störungen im automatischen Betrieb der Ringspinnmaschine, wobei in Betracht zu ziehen ist, dass an bis zu 2'000 Spinnstellen ein Spulenwechsel gleichzeitig erfolgt.It has been shown that on ring spinning machines, in which a bobbin change is made automatically, a reliable separation of the wound on the bobbin yarn is not possible due to the elasticity of the spun yarn. The automatic bobbin changing device separates the yarn by pulling the bobbin away from the spindle, pulling the yarn over a knife edge. However, in an elastic yarn, the yarn is elongated and not reliably separated by the knife. This regularly leads to disruptions in the automatic operation of the ring spinning machine, whereby it should be considered that at up to 2,000 spinning positions a bobbin change takes place simultaneously.

Darstellung der ErfindungPresentation of the invention

Der Erfindung liegt somit die Aufgabe zugrunde, ein Verfahren sowie eine Vorrichtung dazu bereitzustellen, welche eine störungsfreie Trennung des gesponnen elastischen Garns bei einem Spulenwechsel ermöglichen.The invention is therefore based on the object to provide a method and an apparatus for this, which allow a trouble-free separation of the spun elastic yarn in a bobbin change.

Zur Lösung der Aufgabe wird nunmehr ein Verfahren vorgeschlagen, bei welchem beim Abspinnen einer vollen Spule ein Umfangsgeschwindigkeitsverhältnis zwischen dem Ausgangswalzenpaar und dem Lieferwalzenpaar derart angepasst wird, dass die Dehnung des Endlosfadens reduziert wird.To solve the problem, a method is now proposed in which when spinning a full bobbin, a peripheral speed ratio between the pair of output rollers and the delivery roller pair is adjusted so that the elongation of the endless thread is reduced.

Die Umfangsgeschwindigkeit des Lieferwalzenpaares bestimmt die Geschwindigkeit, mit welcher das elastische Filament von der Spule abgespult wird. Die Umfangsgeschwindigkeit des Ausgangswalzenpaares des Streckwerks bestimmt, mit welcher Geschwindigkeit der Faserverband zusammen mit dem elastischen Endlosfaden an die Spinneinrichtung weitergegeben wird. Das Verhältnis zwischen diesen beiden Geschwindigkeiten ist im Betriebsfall auf das verwendete Material des Endlosfadens abgestimmt. Bei Verwendung eines elastischen Endlosfadens ist die Umfangsgeschwindigkeit des Auslaufwalzenpaares höher als die Umfangsgeschwindigkeit des Lieferwalzenpaares und damit das genannte Verhältnis erheblich grösser als 1. Die Grösse des Verhältnisses bestimmt die Dehnung des Endlosfadens, mit welcher dieser das Ausgangswalzenpaar verlässt.The peripheral speed of the delivery roller pair determines the speed at which the elastic filament is unwound from the spool. The peripheral speed of the output roller pair of the drafting determines the speed with which the fiber structure is passed along with the elastic endless thread to the spinning device. The ratio between these two speeds is matched in the operating case to the material used in the continuous filament. When using a continuous elastic thread is the peripheral speed of the pair of outfeed rollers higher than the peripheral speed of the delivery roller pair and thus the said ratio considerably greater than 1. The size of the ratio determines the elongation of the endless thread with which this leaves the pair of delivery rollers.

Wird nun das Umfangsgeschwindigkeitsverhältnis zwischen dem Ausgangswalzenpaar und dem Lieferwalzenpaar beim Abspinnen reduziert, wird der Endlosfaden mit weniger Dehnung an die Spinneinrichtung weitergegeben. Entsprechend ist das fertige Coregarn ebenfalls weniger elastisch, da die um das Endlosgarn herumgesponnenen Fasern selbst keine Dehnung ermöglichen. Das Coregarn kann nur soweit gedehnt werden, bis der Zustand wieder erreicht ist, bei welchem der Faserverband mit dem Endlosfaden die Spinneinrichtung durchlaufen hat. Dadurch ergibt sich ein besseres Trennverhalten beim Abziehen des Coregarns über eine Messerklinge beim automatischen Spulenwechsel.Now, if the peripheral speed ratio between the pair of output rollers and the delivery roller pair is reduced during spinning, the endless thread is passed on to the spinning device with less elongation. Accordingly, the finished core yarn is also less elastic because the fibers spun around the continuous yarn itself do not allow stretching. The core yarn can only be stretched until the state is reached again, in which the fiber structure with the endless thread has passed through the spinning device. This results in a better separation behavior when removing the core yarn over a knife blade during automatic bobbin change.

In einer vorteilhaften Ausführung wird beim Abspinnen das Umfangsgeschwindigkeitsverhältnis zwischen dem Ausgangswalzenpaar und dem Lieferwalzenpaar auf unter 3, vorzugsweise auf zwischen 1 bis 2.5, weiter vorzugsweise auf zwischen 1 bis 1.5 reduziert. Besonders vorteilhaft ist es, wenn beim Abspinnen das Umfangsgeschwindigkeitsverhältnis zwischen dem Ausgangswalzenpaar und dem Lieferwalzenpaar auf eins reduziert wird. Dies bedeutet, dass durch die Spinneinrichtung ein Coregarn hergestellt wird, welches trotz der Verwendung eines elastischen Endlosfadens als Kern in seinen Eigenschaften einem Garn entspricht, das ohne einen elastischen Endlosfaden hergestellt würde. Auf diese Art können für die Trennung des gesponnen Fadens bei einem automatischen Spulenwechsel die gleichen technischen Einrichtung verwendet werden, wie bei einem Stapelfasergarn, welches ohne Zuführung eines elastischen Kerns hergestellt wurde. Da die zu einem Garn umgebildeten Stapelfasern eine stark eingeschränkte Elastizität aufweisen, reisst das Garn schon bei kleinsten Dehnungen. Auf dieses Verhalten hat ein elastischer Kern keinen Einfluss, wenn dieser nicht in einem gedehnten Zustand umsponnen wurde.In an advantageous embodiment, during spinning, the peripheral speed ratio between the pair of delivery rollers and the delivery roller pair is reduced to less than 3, preferably to between 1 to 2.5, more preferably to between 1 to 1.5. It is particularly advantageous if, during spinning, the circumferential speed ratio between the pair of delivery rollers and the delivery roller pair is reduced to one. This means that a core yarn is produced by the spinning device, which corresponds in spite of the use of an elastic endless thread as a core in its properties to a yarn which would be produced without an elastic continuous thread. In this way, the same technical device can be used for the separation of the spun yarn in an automatic bobbin change, as in a staple fiber yarn, which was prepared without supplying an elastic core. Since the staple fibers converted into a yarn have a very limited elasticity, the yarn tears even at the smallest strains. An elastic core has no influence on this behavior if it has not been wound in a stretched state.

Ebenfalls ist eine Vorrichtung zur Herstellung eines elastischen Coregarns mit einem Streckwerk zum Verziehen eines Faserverbandes vorgesehen, wobei das Streckwerk ein Ausgangswalzenpaar aufweist, und ein Lieferwalzenpaar zur Zuführung eines elastischen Endlosfadens zum Ausgangswalzenpaar vorgesehen ist. Zur Einbindung des elastischen Endlosfadens in den Faserverband ist eine Ringspinnvorrichtung vorgesehen, wobei ein Umlaufgeschwindigkeitsverhältnis zwischen dem Ausgangswalzenpaar und dem Lieferwalzenpaar beim Abspinnen reduziert ist.Also, an apparatus for producing an elastic core yarn is provided with a drafting device for warping a fiber structure, wherein the drafting arrangement comprises a pair of output rollers, and a pair of delivery rollers for supplying an elastic Endlosfadens to the pair of output rollers is provided. To integrate the elastic endless thread in the fiber structure, a ring spinning device is provided, wherein a circulation speed ratio between the pair of output rollers and the pair of delivery rollers during spinning is reduced.

In einer vorteilhaften Ausführung ist beim Abspinnen das Umfangsgeschwindigkeitsverhältnis zwischen dem Ausgangswalzenpaar und dem Lieferwalzenpaar auf unter 3, vorzugsweise auf zwischen 1 bis 2.5, weiter vorzugsweise auf zwischen 1 bis 1.5 reduziert. Besonders vorteilhaft ist es, wenn beim Abspinnen das Umfangsgeschwindigkeitsverhältnis zwischen dem Ausgangswalzenpaar und dem Lieferwalzenpaar auf eins reduziert ist.In an advantageous embodiment, during spinning, the peripheral speed ratio between the pair of delivery rollers and the delivery roller pair is reduced to less than 3, preferably to between 1 to 2.5, more preferably to between 1 to 1.5. It is particularly advantageous if, during spinning, the circumferential speed ratio between the pair of delivery rollers and the delivery roller pair is reduced to one.

Die beiden Umfangsgeschwindigkeiten sind vorteilhaft mit einer elektronischen oder mechanischen Kopplung versehen. Es ist in einer vorteilhaften Ausführung eine Steuerung vorgesehen, welche es ermöglicht, die Umfangsgeschwindigkeit des Lieferwalzenpaares an eine sich beim Abspinnen verändernde Umfangsgeschwindigkeit des Ausgangswalzenpaares anzupassen. Es ist jedoch auch denkbar, dass die Antriebe des Lieferwalzenpaares und des Ausgangswalzenpaares mechanisch verbunden sind und beim Abspinnen in dieser Verbindung eine Umschaltung erfolgen kann, um das Umfangsgeschwindigkeitsverhältnis zu reduzieren.The two peripheral speeds are advantageously provided with an electronic or mechanical coupling. In an advantageous embodiment, a control is provided which makes it possible to adapt the peripheral speed of the delivery roller pair to a peripheral speed of the output roller pair which changes during spinning. However, it is also conceivable that the drives of the delivery roller pair and the pair of output rollers are mechanically connected and when spinning in this connection, a switch can be made to reduce the peripheral speed ratio.

Kurze Beschreibung der FigurBrief description of the figure

Im Weiteren wird die Erfindung anhand von der einzigen Figur näher erläutert. Diese zeigt in einer schematischen Darstellung eine Spinnstelle zur Herstellung von elastischem Coregarn. Es werden nur die für die Erfindung wichtigen Elemente gezeigt.Furthermore, the invention will be explained in more detail with reference to the single FIGURE. This shows a schematic representation of a spinning station for the production of elastic core yarn. Only the elements important to the invention are shown.

Wege zur Ausführung der ErfindungWays to carry out the invention

In der einzigen Figur ist eine Spinnstelle einer Ringspinnmaschine gezeigt. Die Spinnstelle umfasst ein Streckwerk 1 mit einem Ausgangswalzenpaar 3. Das Streckwerk 1 ist beispielhaft mit einem Eingangswalzenpaar 13 und einem mit jeweils einem Riemchen 15 umschlungenen Mittelwalzenpaar 14. Der in das Streckwerk 1 einlaufende Faserverband 2 wird bedingt durch die unterschiedlichen Drehzahlen der Walzenpaare beim Durchlaufen des Streckwerks 1 verzogen. Vor dem Ausgangswalzenpaar 3 wird dem Faserverband 2 ein elastischer Endlosfaden 8 zugeführt. Die Zuführung erfolgt über ein Lieferwalzenpaar 9, welches den Endlosfaden 8 von einer Vorratsspule 10 abspult. Der Faserverband 2 und der Endlosfaden 8 werden über einen Fadenführer 4 zu einem Läufer 5 geführt. Der Läufer 4 rotiert auf einem Ring 6 um eine sich drehende Spule 7. Durch die Drehbewegungen von Läufer 4 und Spule 7 wird der Faserverband 2 zusammen mit dem Endlosfaden 8 zu einem fertigen Coregarn umgebildet und gleichzeitig auf der Spule 7 aufgewickelt. Der Ring 6 ist auf einer Ringbank 11 befestigt, welche sich entlang der Spulenachse 12 hin und her respektive auf und ab bewegt, was sich in einer gleichmässigen Aufwicklung des Coregarns auf der Spule 7 auswirkt.In the single figure, a spinning station of a ring spinning machine is shown. The drafting device comprises a drafting system 1 with a pair of output rollers 3. The drafting system 1 is exemplified with an input roller pair 13 and a respectively looped 15 a medium roller pair 14. The incoming into the drafting 1 fiber strand 2 is due to the different speeds of the roller pairs when passing through Drafting system 1 warped. Before the output roller pair 3 is the Fiber structure 2 fed to a continuous elastic thread 8. The feeding takes place via a delivery roller pair 9, which unwinds the endless thread 8 from a supply reel 10. The fiber structure 2 and the endless thread 8 are guided via a yarn guide 4 to a rotor 5. The rotor 4 rotates on a ring 6 about a rotating coil 7. By the rotational movements of rotor 4 and coil 7 of the fiber structure 2 is formed together with the continuous filament 8 to a finished core yarn and wound simultaneously on the bobbin 7. The ring 6 is mounted on a ring rail 11 which moves along the coil axis 12 back and forth respectively up and down, resulting in a uniform winding of the core yarn on the coil 7.

Die Umgangsgeschwindigkeit des Lieferwalzenpaares 9 steht in einem bestimmten Verhältnis zur Umfangsgeschwindigkeit des Ausgangswalzenpaares 3, welches im Betrieb durch das verwendete Material des Endlosfadens 8 bestimmt wird.The handling speed of the delivery roller pair 9 is in a certain ratio to the peripheral speed of the output roller pair 3, which is determined in operation by the material used of the endless thread 8.

In einer vorteilhaften Ausführung wird beim Abspinnen das Umfangsgeschwindigkeitsverhältnis zwischen dem Ausgangswalzenpaar 3 und dem Lieferwalzenpaar 9 auf unter 3, vorzugsweise auf zwischen 1 bis 2.5, weiter vorzugsweise auf zwischen 1 bis 1.5 reduziert. Besonders vorteilhaft ist es, wenn beim Abspinnen das Umfangsgeschwindigkeitsverhältnis zwischen dem Ausgangswalzenpaar und dem Lieferwalzenpaar auf eins reduziert wird. Dies bedeutet, dass durch die Spinneinrichtung ein Coregarn hergestellt wird, welches trotz der Verwendung eines elastischen Endlosfadens als Kern in seinen Eigenschaften einem Garn entspricht, das ohne einen elastischen Endlosfaden hergestellt würde. Auf diese Art können für die Trennung des gesponnen Fadens bei einem automatischen Spulenwechsel die gleiche technische Einrichtung verwendet werden, wie bei einem Stapelfasergarn, welches ohne Zuführung eines elastischen Kerns hergestellt wurde. Da die zu einem Garn umgebildeten Stapelfasern eine stark eingeschränkte Elastizität aufweisen, reisst das Garn schon bei kleinsten Dehnungen. Auf dieses Verhalten hat ein elastischer Kern keinen Einfluss, wenn dieser nicht in einem gedehnten Zustand umsponnen wurde.In an advantageous embodiment, during spinning, the peripheral speed ratio between the pair of output rollers 3 and the delivery roller pair 9 is reduced to less than 3, preferably to between 1 to 2.5, more preferably to between 1 and 1.5. It is particularly advantageous if, during spinning, the circumferential speed ratio between the pair of delivery rollers and the delivery roller pair is reduced to one. This means that a core yarn is produced by the spinning device, which corresponds in spite of the use of an elastic endless thread as a core in its properties to a yarn which would be produced without an elastic continuous thread. In this way, the same technical device can be used for the separation of the spun yarn in an automatic bobbin change, as in a staple fiber yarn, which was prepared without supplying an elastic core. Since the staple fibers converted into a yarn have a very limited elasticity, the yarn tears even at the smallest strains. An elastic core has no influence on this behavior if it has not been wound in a stretched state.

Die beiden Umfangsgeschwindigkeiten sind mit einer Kopplung 16 versehen. Dies kann elektronisch oder mechanisch ausgeführt sein. Es ist in einer vorteilhaften Ausführung eine Steuerung vorgesehen, welche es ermöglicht, die Umfangsgeschwindigkeit des Lieferwalzenpaares an eine sich beim Abspinnen verändernde Umfangsgeschwindigkeit des Ausgangswalzenpaares anzupassen. Es ist jedoch auch denkbar, dass die Antriebe des Lieferwalzenpaares und des Ausgangswalzenpaares verbunden sind und beim Abspinnen in dieser Verbindung eine Umschaltung erfolgen kann, um das Umfangsgeschwindigkeitsverhältnis zu reduzieren.The two peripheral speeds are provided with a coupling 16. This can be carried out electronically or mechanically. It is provided in an advantageous embodiment, a control, which makes it possible, the peripheral speed of the pair of delivery rollers to a changing during the spinning peripheral speed Adjust the output roller pair. However, it is also conceivable that the drives of the delivery roller pair and the pair of output rollers are connected and when spinning in this connection, a switch can be made to reduce the peripheral speed ratio.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Streckwerkdrafting system
22
Faserverbandfiber structure
33
AusgangswalzenpaarRoller pair
44
Fadenführerthread guides
55
Läuferrunner
66
Ringring
77
SpuleKitchen sink
88th
Endlosfadencontinuous filament
99
LieferwalzenpaarPair of delivery rollers
1010
Vorratsspulesupply spool
1111
Ringbankring rail
1212
Spulenachsecoil axis
1313
EingangswalzenpaarPair of input rollers
1414
MittelwalzenpaarCentral roller pair
1515
RiemchenStrappy
1616
Kopplung der UmfangsgeschwindigkeitenCoupling of peripheral speeds

Claims (15)

Verfahren zur Herstellung von elastischem Coregarn mit einer Ringspinnmaschine, • wobei einem Streckwerk (1) ein Faserverband (2) zugeführt wird, der Faserverband (2) beim Durchlaufen des Streckwerks (1) verzogen und durch das Ausgangswalzenpaar (3) das Streckwerk (1) verlässt, und über einen Fadenführer (4) zu einem Läufer (5) geführt und über den auf einem Ring (6) umlaufenden Läufer (5) auf eine sich drehende Spule (7) aufgewickelt wird, • wobei dem Faserverband (2) beim Einlauf in das Ausgangswalzenpaar (3) ein elastischer Endlosfaden (8) über ein Lieferwalzenpaar (9) zugeführt wird, • wobei der Endlosfaden (8) durch ein entsprechendes Umfangsgeschwindigkeitsverhältnis zwischen dem Lieferwalzenpaar (9) und dem Ausgangswalzenpaar (3) gedehnt wird und nach Verlassen des Ausgangswalzenpaares (3) durch die Wirkung von Läufer (5) und Spule (7) in den Faserverband (2) eingesponnen und der Faserverband (2) mit dem gedehnten Endlosfaden (8) zu einem elastischen Garn umgebildet wird, dadurch gekennzeichnet, dass
beim Abspinnen einer vollen Spule (7) das Umfangsgeschwindigkeitsverhältnis zwischen dem Ausgangswalzenpaar (3) und dem Lieferwalzenpaar (9) derart angepasst wird, dass die Dehnung des Endlosfadens (8) reduziert wird.Process for producing elastic core yarn with a ring spinning machine, Whereby a fiber structure (2) is fed to a drafting system (1), the fiber structure (2) is warped when passing through the drafting system (1) and leaves the drafting system (1) by the pair of outfeed rollers (3) and via a yarn guide (4) a rotor (5) guided and wound on the on a ring (6) rotor (5) on a rotating coil (7), Wherein an elastic endless thread (8) is fed to the fiber structure (2) when entering the pair of delivery rollers (3) via a delivery roller pair (9), Wherein the endless thread (8) is stretched by a corresponding peripheral speed ratio between the delivery roller pair (9) and the pair of output rollers (3) and after leaving the exit roller pair (3) by the action of the rotor (5) and coil (7) in the fiber structure ( 2) and the fiber structure (2) with the stretched endless thread (8) is converted into an elastic yarn, characterized in that
when spinning a full bobbin (7), the peripheral speed ratio between the pair of output rollers (3) and the pair of delivery rollers (9) is adjusted so as to reduce the elongation of the endless thread (8). Verfahren nach Anspruch 1, dadurch gekennzeichnet, dass beim Abspinnen das Umfangsgeschwindigkeitsverhältnis zwischen dem Ausgangswalzenpaar (3) und dem Lieferwalzenpaar (9) auf unter 3 reduziert wird.A method according to claim 1, characterized in that during the spinning, the peripheral speed ratio between the pair of output rollers (3) and the pair of delivery rollers (9) is reduced to less than 3. Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass beim Abspinnen das Umfangsgeschwindigkeitsverhältnis zwischen dem Ausgangswalzenpaar (3) und dem Lieferwalzenpaar (9) auf 1 bis 2.5 reduziert wird.Method according to one of claims 1 or 2, characterized in that during the spinning, the peripheral speed ratio between the pair of output rollers (3) and the pair of delivery rollers (9) is reduced to 1 to 2.5. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass beim Abspinnen das Umfangsgeschwindigkeitsverhältnis zwischen dem Ausgangswalzenpaar (3) und dem Lieferwalzenpaar (9) auf 1 bis 1.5 reduziert wird.Method according to one of claims 1 to 3, characterized in that during the spinning, the peripheral speed ratio between the pair of output rollers (3) and the pair of delivery rollers (9) is reduced to 1 to 1.5. Verfahren nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass beim Abspinnen das Umfangsgeschwindigkeitsverhältnis zwischen dem Ausgangswalzenpaar (3) und dem Lieferwalzenpaar (9) auf 1 reduziert wird.Method according to one of claims 1 to 4, characterized in that during the spinning, the peripheral speed ratio between the pair of output rollers (3) and the pair of delivery rollers (9) is reduced to 1. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Umfangsgeschwindigkeit durch eine elektronische Steuerung angepasst wird.Method according to one of claims 1 to 5, characterized in that the peripheral speed is adjusted by an electronic control. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Umfangsgeschwindigkeitsverhältnis durch eine mechanische Umschaltung reduziert wird.Method according to one of claims 1 to 5, characterized in that the peripheral speed ratio is reduced by a mechanical switching. Vorrichtung zur Herstellung eines elastischen Coregarns mit einem Streckwerk (1) zum Verziehen eines Faserverbandes (2), • wobei das Streckwerk (1) ein Ausgangswalzenpaar (3) aufweist, und mit einem Lieferwalzenpaar (9) zur Zuführung eines elastischen Endlosfadens (8) zum Ausgangswalzenpaar (3), • wobei ein Umfangsgeschwindigkeitsverhältnis zwischen dem Ausgangswalzenpaar (3) und dem Lieferwalzenpaar (9) während des Betriebs bestimmt ist; und • wobei zur Einbindung des elastischen Endlosfadens (8) in den Faserverband (2) eine Ringspinnvorrichtung mit einem Fadenführer (4), einem Läufer (5) und einer sich drehenden Spule (7) vorgesehen ist, dadurch gekennzeichnet, dass
das Umfangsgeschwindigkeitsverhältnis zwischen dem Ausgangswalzenpaar (3) und dem Lieferwalzenpaar (9) beim Abspinnen reduziert ist.Device for producing an elastic core yarn with a drafting system (1) for warping a fiber structure (2), Wherein the drafting system (1) has a pair of delivery rollers (3), and with a delivery roller pair (9) for feeding an elastic endless thread (8) to the delivery roller pair (3), • wherein a peripheral speed ratio between the pair of output rollers (3) and the pair of delivery rollers (9) is determined during operation; and Wherein a ring spinning device with a yarn guide (4), a rotor (5) and a rotating coil (7) is provided for incorporating the elastic endless thread (8) into the fiber structure (2), characterized in that
the peripheral speed ratio between the pair of output rollers (3) and the pair of delivery rollers (9) during spinning is reduced. Vorrichtung nach Anspruch 8, dadurch gekennzeichnet, dass beim Abspinnen das Umfangsgeschwindigkeitsverhältnis zwischen dem Ausgangswalzenpaar (3) und dem Lieferwalzenpaar (9) auf unter 3 reduziert ist.Apparatus according to claim 8, characterized in that during the spinning, the peripheral speed ratio between the pair of output rollers (3) and the pair of delivery rollers (9) is reduced to less than 3. Vorrichtung nach einem der Ansprüche 8 oder 9, dadurch gekennzeichnet, dass beim Abspinnen das Umfangsgeschwindigkeitsverhältnis zwischen dem Ausgangswalzenpaar (3) und dem Lieferwalzenpaar (9) auf 1 bis 2.5 reduziert ist.Device according to one of claims 8 or 9, characterized in that during the spinning, the peripheral speed ratio between the pair of output rollers (3) and the pair of delivery rollers (9) is reduced to 1 to 2.5. Vorrichtung nach einem der Ansprüche 8 bis 10, dadurch gekennzeichnet, dass beim Abspinnen das Umfangsgeschwindigkeitsverhältnis zwischen dem Ausgangswalzenpaar (3) und dem Lieferwalzenpaar (9) auf 1 bis 1.5 reduziert ist.Device according to one of claims 8 to 10, characterized in that during the spinning, the peripheral speed ratio between the pair of output rollers (3) and the pair of delivery rollers (9) is reduced to 1 to 1.5. Vorrichtung nach einem der Ansprüche 8 bis 11, dadurch gekennzeichnet, dass beim Abspinnen das Umfangsgeschwindigkeitsverhältnis zwischen dem Ausgangswalzenpaar (3) und dem Lieferwalzenpaar (9) auf 1 reduziert ist.Device according to one of claims 8 to 11, characterized in that during the spinning, the peripheral speed ratio between the pair of output rollers (3) and the pair of delivery rollers (9) is reduced to 1. Vorrichtung nach einem der Ansprüche 8 bis 12, dadurch gekennzeichnet, dass das Ausgangswalzenpaar (3) und das Lieferwalzenpaar (9) sind mit einer elektonischen oder mechanischen Kopplung (16) versehen ist.Device according to one of claims 8 to 12, characterized in that the pair of output rollers (3) and the delivery roller pair (9) are provided with an electronic or mechanical coupling (16). Vorrichtung nach einem der Ansprüche 8 bis 13, dadurch gekennzeichnet, dass eine Steuerung vorgesehen ist, welche es ermöglicht, die Umfangsgeschwindigkeit des Lieferwalzenpaares (9) an eine sich beim Abspinnen verändernde Umfangsgeschwindigkeit des Ausgangswalzenpaares (3) anzupassen.Device according to one of claims 8 to 13, characterized in that a control is provided, which makes it possible to adapt the peripheral speed of the delivery roller pair (9) to a changing during spinning peripheral speed of the output roller pair (3). Vorrichtung nach einem der Ansprüche 8 bis 13, dadurch gekennzeichnet, dass die Antriebe des Lieferwalzenpaares (9) und des Ausgangswalzenpaar mechanisch verbunden sind, und beim Abspinnen in dieser Verbindung eine Umschaltung erfolgen kann, um das Umfangsgeschwindigkeitsverhältnis zu reduzieren.Device according to one of claims 8 to 13, characterized in that the drives of the delivery roller pair (9) and the pair of output rollers are mechanically connected, and when spinning in this connection, a switch can be made to reduce the peripheral speed ratio.
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ES2839282T3 (en) 2021-07-05

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