EP3842578B1 - Ring spinning machine and method for producing a core yarn - Google Patents

Ring spinning machine and method for producing a core yarn Download PDF

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Publication number
EP3842578B1
EP3842578B1 EP20213398.9A EP20213398A EP3842578B1 EP 3842578 B1 EP3842578 B1 EP 3842578B1 EP 20213398 A EP20213398 A EP 20213398A EP 3842578 B1 EP3842578 B1 EP 3842578B1
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EP
European Patent Office
Prior art keywords
clamping
thread
fibre composite
groove
rollers
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EP20213398.9A
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German (de)
French (fr)
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EP3842578A1 (en
Inventor
Ludger Budde
Oliver Dorn
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Peppermint Holding GmbH
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Peppermint Holding GmbH
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Priority to EP23198988.0A priority Critical patent/EP4273310A3/en
Publication of EP3842578A1 publication Critical patent/EP3842578A1/en
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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
    • 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
    • D02G3/367—Cored or coated yarns or threads using a drawing frame
    • 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
    • D01H5/70—Constructional features of drafting elements
    • D01H5/74—Rollers or roller bearings
    • D01H5/78—Rollers or roller bearings with flutes or other integral surface characteristics
    • 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

Definitions

  • the present invention relates to a ring spinning machine and a method for producing a core yarn.
  • Core yarns consist of several components, for example a filament, which forms the core of the later core yarn, is covered with spinnable fibers. In this way, the desired properties of the individual components are combined with one another. This enables the production of elastic and dimensionally stable fabrics that, for example, also offer the wearing comfort of cotton.
  • the filament runs via a deflection roller into a pair of clamping rollers, which clamp the filament along a clamping line in the same way as a staple fiber structure that was previously stretched in a drafting system.
  • the two components i.e. the filament and the staple fiber structure
  • a rotation which is caused by a rotation imparting device that rotates around a yarn cop and thereby winds the yarn on the cop.
  • the DE 198 04 341 A1 shows such a device and a corresponding method. Since the filament as well as the staple fiber structure is engaged by the clamping line, the respective delivery speeds of the components cannot be varied, so that no influence can be had on where the filament will lie in the later yarn. In conventional core yarns, the filament repeatedly comes to the surface of the finished yarn and is therefore partially covered by staple fibers along its length.
  • the GB 765 295 A , US 3,009,311 A and CN 102 330 235 A show further ring spinning machines for producing a core yarn.
  • the yarn core can not only be made completely invisible by completely covering it with a staple fiber structure, which in particular significantly improves the dyeing ability of the yarn, but can also be removed from direct contact, for example with the skin.
  • the ring spinning machine has at least one groove running around the circumferential surface of at least one of the clamping rollers and interrupting the clamping line, which receives the at least one thread as it passes through the clamping device and leads it past the clamping line without it being engaged in a clamping manner by the clamping rollers that are in contact with one another .
  • at least one thread which is later to form the core of the core yarn, is fed in a known manner to the clamping device at the outlet of the drafting system and, like the staple fiber structure, runs between the two clamping rollers, which roll on one another along a clamping line.
  • this at least one thread is not clamped by the clamping rollers along the clamping line like the staple fiber association, but is removed from the clamping engagement by running into a groove before or at the latest at the clamping line, which is at least in the outer lateral surface one of the clamping rollers is incorporated. In this way, the at least one thread can pass the clamping line without coming into contact with the clamping rollers.
  • the at least one thread to be fed to the fiber structure and which later forms the yarn core can also include or consist of a staple fiber structure.
  • the at least one thread can also comprise one or more continuous filaments or consist of these.
  • the at least one thread can comprise/be an inelastic endless filament or can comprise/be an elastic endless filament, wherein the at least one thread in particular can also include or consist of at least one inelastic endless filament in addition to at least one elastic endless filament.
  • At least one further thread can also be fed to the fiber structure in a conventional manner.
  • a conventionally fed thread can be, for example, an elastic or inelastic endless filament, which is engaged by the clamping rollers at the clamping line.
  • such a conventionally fed thread can be engaged in the section of the clamping line in which the staple fiber structure is also engaged by the clamping rollers.
  • all components of the finished core yarn pass through the clamping device and/or are brought together before passing through a thread guide immediately adjacent to the clamping device.
  • the first alternative is intended to express that no further parts or components that have not passed through the clamping device are added to the core yarn after it leaves the clamping device.
  • the yarn leaving the drafting system and the clamping device is wrapped with a so-called effect yarn, as is the case, for example, from DE 24 12 390 is shown is intended to be avoided by the present invention. Rather, all components of the later core yarn should be guided through the clamping device in a compact manner in order to be twisted into the finished core yarn immediately after the clamping line.
  • the finished core yarn can already be present at the end of the spinning triangle adjoining the clamping line, but this does not rule out the core yarn being twisted further until it is finally wound onto a yarn cop.
  • the finished core yarn can also be present in its composition before it passes through the first thread guide, which connects directly to the clamping device or the clamping line in the transport path of the yarn, i.e. without the interposition of further equipment on the ring spinning machine.
  • the fiber structure and the at least one thread can pass through a thread guide immediately after leaving the clamping device, which essentially occupies the same axial position as a groove relative to an axis of rotation of one of the clamping rollers.
  • the aim of this is to ensure that the transport path imposed on the yarn components by the thread guide does not result in the thread picked up in the groove coming into contact with its walls when leaving the groove and thus wearing them out.
  • a further advantage associated with this arrangement of the thread guide is that the thread guide influences the twisting of the thread caused by the rotation imparting device as little as possible, so that the twisting of the thread continues as far as possible beyond the clamping line, so that the thread is then subject to a subdivision of rotation can before or while it passes the clamping line.
  • this thread guide can be positioned to a preferred groove in the manner described above, while the other grooves arranged offset thereto can be arranged near the first-mentioned groove in order to achieve the influences described above minimize.
  • the clamping line can be interrupted several times by two or more grooves, which are machined into the peripheral surface of one or different clamping rollers at a distance from one another.
  • the clamping line can also be formed at one or more points by two opposite grooves running around the circumferential surfaces of both clamping rollers be interrupted.
  • pairs of clamping rollers are usually formed by a drive roller made of a metal material and a pressure roller made of a rubber material that is prestressed relative to the drive roller.
  • the one or more grooves can be incorporated in any way into one or both of these rollers.
  • At least one or more grooves have a flat or concave bottom region in cross section, the axial extent of which, parallel to the axis of rotation of the clamping roller, is at least one, in particular at least twice, the diameter of a thread to be picked up by the groove.
  • a thread received in a groove if possible, does not contact any side wall of the groove in order to avoid unnecessary wear.
  • the side walls of the groove can be sufficiently spaced apart.
  • the groove bottom is at least partially concave or has partial sections that converge in a wedge shape.
  • a clamping effect on the thread similar to that of a V-belt pulley, should be avoided in order not to impair the thread itself or its transport.
  • this can be designed in such a way that its axial extent parallel to the axis of rotation of the respective clamping roller increases with increasing distance from the axis of rotation.
  • the cross section of the groove can widen at least in sections towards the peripheral surface of the clamping roller. What would be conceivable for this would be a "chamfered” or rounded transition of the groove side walls towards the roller surface, as well as groove side walls that diverge in cross section.
  • the at least one groove is spaced from the section of the clamping line in which the fiber structure is clampingly engaged by the mutually contacting clamping rollers after leaving the drafting system. This prevents the groove provided for the thread from becoming clogged with staple fibers detaching from the fiber structure and thus becoming unusable for thread guidance.
  • a small distance between the groove and the section of the clamping line engaging the fiber structure should be aimed for, since as the distance becomes smaller, the necessary staple fiber length of processable fiber structures also decreases. Since the thread leaving the groove is ultimately intended to be wrapped by the staple fiber structure, the latter must be brought close to the thread after leaving the clamping line.
  • the groove is spaced from the clamping line section engaging the staple fiber assembly, the path to be covered by the staple fiber assembly increases and ultimately the risk of it tearing off also increases. According to the present invention, this distance can be selected depending on the staple fiber length to be processed. According to the invention, the axial position of the groove can be varied by axially moving the corresponding clamping roller in the ring spinning machine. In addition, the use of different clamping rollers with grooves arranged differently in the axial direction would also be conceivable.
  • the one or more threads guided through the at least one groove escape the clamping line and thus also the clamping engagement between the clamping rollers, they can be over-delivered or under-delivered compared to the fiber structure in any way, i.e. an arbitrarily higher or arbitrarily lower delivery speed when passing through the clamping device. Since, according to a preferred embodiment, complete coverage of the at least one thread by the staple fiber association is desired over the length, in such an embodiment the thread can be delivered below the staple fiber association. Since the fiber structure emerges from the clamping device at a greater delivery speed, it can wrap around the at least one thread and ultimately cover it completely. For example, the thread can be 5%, 10%, 15% or even 20% have a lower delivery speed than the fiber structure, i.e. under-delivery by 5%, 10%, 15% or even 20%.
  • a further aspect of the present invention relates to a method for producing a core yarn according to claim 8.
  • the Figure 1 shows a ring spinning machine according to the present invention, by means of which a fiber structure 2, also known as a sliver or roving, and a thread 4, which in the present case is provided as an elastic or inelastic or rigid endless filament, are drawn off from material templates 1 or 3 and spun into a core yarn 11 become.
  • the fiber structure 2 pulled off from the material template 1 passes through an initially unnamed pair of inlet rollers of the drafting system 5 and is then fed to the drafting system 5, which pulls the staple fibers of the fiber structure apart to a desired degree.
  • the fiber structure 2 is then fed to a pair of outlet rollers of the drafting system 5, which is referred to below as a clamping device 6.
  • the clamping roller 8 which is made of a metal material and designed as a drive roller, contacts the clamping roller 9, which is prestressed relative to it, is made of a rubber material and is designed as a pressure roller, along a clamping line 7, along which the fiber structure 2 is clamped by the clamping rollers 8, 9.
  • the fiber structure 2 is fed to the thread 4, which is pulled off from the material template 3 by means of a drive device (not shown), guided over an unnamed deflection roller and passed between the clamping rollers 8, 9 through the clamping device 6.
  • the thread 4 is not engaged by the clamping rollers 8, 9 in a clamping manner, but is instead clamped by means of a groove (see the Figures 2 and 3 ) passed the clamping line 7 and can therefore pass through the clamping device with an under-delivery compared to the fiber structure 2.
  • the fiber structure 2 that has been delivered compared to the thread 4 is placed around the thread 4 by the rotation distribution device 10 being applied to both the fiber structure 2 as well as the thread 4, a rotation is imposed before they are wound up as the finished twisted core yarn 11 on the unnamed yarn cop.
  • the Figure 2 shows a detailed view of the clamping device 6 in the Figure 1 shown ring spinning machine along the rotation axes R of the clamping rollers 8, 9. It can be seen that the thread 4 pulled off from the material template 3 is first guided over an unnamed deflection roller and, when detached from its peripheral surface, is inserted into a groove 13, which is in the Circumferential surface 12 of the clamping roller 9 is incorporated and runs circumferentially. Since the depth of the groove 13 is greater than the diameter of the thread 4, the thread 4 is guided past the clamping line 7 in the groove 13 and is therefore not engaged by the clamping rollers 8, 9, as is the case for the fiber structure 2 . The latter is namely clamped between the peripheral surfaces 12 and 16 of the clamping rollers 9 and 8 along the clamping line 7.
  • the Figure 3 shows a side view of the viewing plane AA from the Figure 2 . It can be seen that the fiber structure 2 and the thread 4 are guided between the clamping rollers 8, 9 parallel and perpendicular to the axes of rotation R of the clamping rollers 8, 9.
  • the fiber structure 2 is clamped along the section 15 of the clamping line 7 by the clamping rollers 8 and 9.
  • the thread 4 can Clamping line 7 can pass unhindered and unaffected by the rotation of the clamping rollers 8, 9 by inserting itself into the groove 13, which is spaced from section 15 along the axis of rotation R of the clamping roller 9. Clogging of the groove 13 by staple fibers coming loose from the fiber structure 2 is effectively avoided by the distance between the groove 13 and section 15.
  • the fiber structure 2 After passing the clamping line 7, the fiber structure 2 is fed to the thread 4 and wraps around the thread in such a way that it is completely covered by the fiber structure 2 over its entire length. This is achieved in that the thread 4 is under-delivered compared to the fiber structure 2 to a certain extent, i.e. has a lower delivery speed than the fiber structure 2.
  • the fiber structure 2 thus has a sufficiently large delivery length to wrap around the thread 4.
  • the placement of the thread guide 14 immediately adjacent to the clamping line 7 in a substantially same axial position as the groove 13 ensures that the thread 4 becomes the main point of attack for imparting rotation and the Fiber structure 2 therefore inevitably lies around the thread 4.
  • the fiber structure 2 can be placed around the thread 4 without tearing off by separating staple fibers from one another in the longitudinal direction. Even before the fiber structure 2 passes through the thread guide 14 together with the thread 4, the finished core yarn 11 with all of its components is already there, as it is ultimately wound onto a yarn cop. However, the twisting of the fiber structure 2 together with the thread 4, which is caused by the rotation distribution device 10 and begins in the area of the clamping line 7, continues even after the thread guide 14 has passed through.

Description

Die vorliegende Erfindung betrifft eine Ringspinnmaschine und ein Verfahren zur Herstellung eines Core-Garns.The present invention relates to a ring spinning machine and a method for producing a core yarn.

Core-Garne bestehen aus mehreren Komponenten, wobei beispielsweise ein Filament, welches den Kern des späteren Core-Garns bildet, mit verspinnbaren Fasern umsponnen wird. Auf diese Weise werden die gewünschten Eigenschaften der Einzelkomponenten miteinander kombiniert. Dies ermöglicht die Herstellung von elastischen und sogleich formbeständigen Geweben, die beispielsweise zugleich den Tragekomfort von Baumwolle bieten.Core yarns consist of several components, for example a filament, which forms the core of the later core yarn, is covered with spinnable fibers. In this way, the desired properties of the individual components are combined with one another. This enables the production of elastic and dimensionally stable fabrics that, for example, also offer the wearing comfort of cotton.

Bei der klassischen Herstellung von Core-Garnen läuft das Filament über eine Umlenkrolle in ein Klemmrollenpaar ein, welches das Filament ebenso wie einen zuvor in einem Streckwerk verstreckten Stapelfaserverband entlang einer Klemmlinie klemmend in Eingriff nimmt. Nach dem Verlassen der Klemmlinie werden die beiden Komponenten, also das Filament und der Stapelfaserverband gleichermaßen von einer Drehung erfasst, welche von einer Dreherteilungseinrichtung hervorgerufen wird, die einen Garn-Kops umläuft und hierbei dem Garn auf dem Kops aufwickelt. Die DE 198 04 341 A1 zeigt eine solche Vorrichtung und ein entsprechendes Verfahren. Da das Filament ebenso wie der Stapelfaserverband von der Klemmlinie in Eingriff genommen wird, können die jeweiligen Liefergeschwindigkeiten der Komponenten zueinander nicht variiert werden, sodass auch kein Einfluss darauf genommen werden kann, wo das Filament im späteren Garn zu liegen kommt. So tritt das Filament bei herkömmlichen Core-Garnen immer wieder an die Oberfläche des fertigen Garns und wird demnach von Stapelfaserverband über seine Länge hinweg teilweise belegt.In the classic production of core yarns, the filament runs via a deflection roller into a pair of clamping rollers, which clamp the filament along a clamping line in the same way as a staple fiber structure that was previously stretched in a drafting system. After leaving the clamping line, the two components, i.e. the filament and the staple fiber structure, are equally caught by a rotation, which is caused by a rotation imparting device that rotates around a yarn cop and thereby winds the yarn on the cop. The DE 198 04 341 A1 shows such a device and a corresponding method. Since the filament as well as the staple fiber structure is engaged by the clamping line, the respective delivery speeds of the components cannot be varied, so that no influence can be had on where the filament will lie in the later yarn. In conventional core yarns, the filament repeatedly comes to the surface of the finished yarn and is therefore partially covered by staple fibers along its length.

Die GB 765 295 A , US 3 009 311 A und CN 102 330 235 A zeigen weitere Ringspinnmaschinen zur Herstellung eines Core-Garns.The GB 765 295 A , US 3,009,311 A and CN 102 330 235 A show further ring spinning machines for producing a core yarn.

Es ist die Aufgabe der vorliegenden Erfindung, eine Vorrichtung und ein Verfahren zur Herstellung eines Core-Garns bereitzustellen, dessen Kernkomponente über seine gesamte Länge hinweg gänzlich von einem Stapelfaserverband belegt ist, also nicht wie bei bisherigen Core-Garnen regelmäßig an die Oberfläche tritt. Insbesondere bei der Verwendung eines oder mehrerer Filamente als Garnkern kann durch eine vollumfängliche Umhüllung durch einen Stapelfaserverband der Garnkern nicht nur vollständig unsichtbar gemacht werden, was insbesondere die Färbemöglichkeit des Garns entscheidend verbessert, sondern auch einem direkten Kontakt, etwa mit der Haut entzogen werden.It is the object of the present invention to provide a device and a method for producing a core yarn, the core component of which is entirely covered by a staple fiber structure over its entire length, i.e. does not regularly come to the surface as with previous core yarns. Particularly when using one or more filaments as a yarn core, the yarn core can not only be made completely invisible by completely covering it with a staple fiber structure, which in particular significantly improves the dyeing ability of the yarn, but can also be removed from direct contact, for example with the skin.

Diese Aufgabe wird durch eine Ringspinnmaschine gemäß dem Patentanspruch 1 und ein Verfahren gemäß dem Patentanspruch 8 gelöst.This object is achieved by a ring spinning machine according to claim 1 and a method according to claim 8.

Die Ringspinnmaschine zur Herstellung eines Core-Garns gemäß der vorliegenden Erfindung umfasst hierbei:

  • eine erste Materialvorlage für einen Faserverband aus Stapelfasern;
  • zumindest eine weitere Materialvorlage für zumindest einen dem Faserverband zuzuführenden Faden, insbesondere Endlosfilament;
  • ein Streckwerk zum Verstrecken des Faserverbands;
  • eine Klemmeinrichtung mit in einer Klemmlinie einander kontaktierenden Klemmrollen, wobei die Klemmeinrichtung von dem das Streckwerk verlassenden Faserverband und dem zumindest einen Faden durchlaufen wird;
  • eine Drehungserteilungseinrichtung, welche den die Klemmeinrichtung verlassenden Faserverband und den zumindest einen die Klemmeinrichtung verlassenden Faden zu einem Core-Garn verdreht.
The ring spinning machine for producing a core yarn according to the present invention comprises:
  • a first material template for a fiber structure made of staple fibers;
  • at least one further material template for at least one thread to be fed to the fiber structure, in particular endless filament;
  • a drafting system for stretching the fiber structure;
  • a clamping device with clamping rollers contacting one another in a clamping line, the clamping device being passed through by the fiber structure leaving the drafting system and the at least one thread;
  • a rotation imparting device which twists the fiber structure leaving the clamping device and the at least one thread leaving the clamping device into a core yarn.

Die erfindungsgemäße Ringspinnmaschine weist zumindest eine an der Umfangsfläche zumindest einer der Klemmrollen umlaufende und die Klemmlinie unterbrechende Nut auf, welche den zumindest einen Faden beim Durchlaufen der Klemmeinrichtung aufnimmt und an der Klemmlinie vorbeiführt, ohne dass dieser von den einander kontaktierenden Klemmrollen klemmend in Eingriff genommen wird. Gemäß der vorliegenden Erfindung wird also zumindest ein Faden, welcher später den Kern des Core-Garns bilden soll, in bekannter Weise der Klemmeinrichtung am Auslauf des Streckwerks zugeführt und läuft ebenso wie der Stapelfaserverband zwischen den beiden Klemmrollen hindurch, welche entlang einer Klemmlinie aufeinander abrollen. Im Gegensatz zu bisherigen Lösungen wird dieser zumindest eine Faden jedoch nicht wie der Stapelfaserverband von den Klemmrollen entlang der Klemmlinie eingeklemmt, sondern wird dem klemmenden Eingriff dadurch entzogen, indem er vor oder spätestens an der Klemmlinie in eine Nut einläuft, welche in die äußere Mantelfläche zumindest einer der Klemmrollen eingearbeitet ist. Der zumindest eine Faden kann auf diese Weise die Klemmlinie passieren, ohne in den Eingriff der Klemmrollen zu geraten.The ring spinning machine according to the invention has at least one groove running around the circumferential surface of at least one of the clamping rollers and interrupting the clamping line, which receives the at least one thread as it passes through the clamping device and leads it past the clamping line without it being engaged in a clamping manner by the clamping rollers that are in contact with one another . According to the present invention, at least one thread, which is later to form the core of the core yarn, is fed in a known manner to the clamping device at the outlet of the drafting system and, like the staple fiber structure, runs between the two clamping rollers, which roll on one another along a clamping line. In contrast to previous solutions, this at least one thread is not clamped by the clamping rollers along the clamping line like the staple fiber association, but is removed from the clamping engagement by running into a groove before or at the latest at the clamping line, which is at least in the outer lateral surface one of the clamping rollers is incorporated. In this way, the at least one thread can pass the clamping line without coming into contact with the clamping rollers.

An dieser Stelle sei angemerkt, dass der zumindest eine dem Faserverband zuzuführende und den späteren Garnkern bildende Faden ebenfalls einen Stapelfaserverband umfassen oder aus einem solchen bestehen kann. Alternativ kann der zumindest eine Faden auch ein oder mehrere Endlosfilamente umfassen, oder aus diesen bestehen. Insbesondere kann der zumindest eine Faden ein inelastisches Endlosfilament umfassen/sein oder ein elastisches Endlosfilament umfassen/sein, wobei der zumindest eine Faden im Speziellen auch zumindest ein inelastisches Endlosfilament neben zumindest einem elastischen Endlosfilament umfassen oder aus diesen bestehen kann.It should be noted at this point that the at least one thread to be fed to the fiber structure and which later forms the yarn core can also include or consist of a staple fiber structure. Alternatively, the at least one thread can also comprise one or more continuous filaments or consist of these. In particular, the at least one thread can comprise/be an inelastic endless filament or can comprise/be an elastic endless filament, wherein the at least one thread in particular can also include or consist of at least one inelastic endless filament in addition to at least one elastic endless filament.

Ferner ist es vorstellbar, dass mehrere dem Faserverband zuzuführende Fäden von ein und derselben Nut oder durch unterschiedliche Nuten aufgenommen werden, die später noch eingehender beschrieben werden.Furthermore, it is conceivable that several threads to be fed to the fiber structure are received by one and the same groove or by different grooves, which will be described in more detail later.

Auch kann zusätzlich zu dem mindestens einen erfindungsgemäß zugeführten Faden zumindest ein weiterer Faden in konventioneller Weise dem Faserverband zugeführt werden. Ein solch konventionell zugeführter Faden kann beispielsweise ein elastisches oder inelastisches Endlosfilament sein, welcher an der Klemmlinie von den Klemmrollen in Eingriff genommen wird. Insbesondere kann ein solcher konventionell zugeführter Faden in dem Abschnitt der Klemmlinie in Eingriff genommen werden, in welchem auch der Stapelfaserverband von den Klemmrollen in Eingriff genommen wird.In addition to the at least one thread supplied according to the invention, at least one further thread can also be fed to the fiber structure in a conventional manner. Such a conventionally fed thread can be, for example, an elastic or inelastic endless filament, which is engaged by the clamping rollers at the clamping line. In particular, such a conventionally fed thread can be engaged in the section of the clamping line in which the staple fiber structure is also engaged by the clamping rollers.

In einer speziellen Ausführungsform der vorliegenden Erfindung durchlaufen sämtliche Bestandteile des fertigen Core-Garns die Klemmeinrichtung und/oder werden vor dem Durchlaufen eines unmittelbar an die Klemmeinrichtung anschließenden Fadenführers zusammengeführt.In a special embodiment of the present invention, all components of the finished core yarn pass through the clamping device and/or are brought together before passing through a thread guide immediately adjacent to the clamping device.

Durch die erste Alternative soll zum Ausdruck gebracht werden, dass dem Core-Garn nach dem Verlassen der Klemmeinrichtung keine weiteren Bestandteile oder Komponenten hinzugefügt werden, welche die Klemmeinrichtung nicht durchlaufen haben. Ein wie bei sogenannten Effektzwirnmaschinen übliches Umwickeln des das Streckwerk und die Klemmeinrichtung verlassenden Garns mit einem sogenannten Effektgarn, wie dies beispielsweise von der DE 24 12 390 gezeigt wird, soll von der vorliegenden Erfindung gerade vermieden werden. Vielmehr sollen sämtliche Bestandteile des späteren Core-Garns in kompakter Weise zusammengefasst durch die Klemmeinrichtung hindurchgeführt werden, um bereits unmittelbar nach der Klemmlinie zum fertigen Core-Garn verdreht zu werden. Wieder anders gewendet kann bereits am Ende des an die Klemmlinie anschließenden Spinndreiecks das fertige Core-Garn vorliegen, was jedoch nicht ausschließt, dass bis zum letztendlichen Aufwickeln auf einen Garn-Kops der Core-Garn noch weiter verdreht wird.The first alternative is intended to express that no further parts or components that have not passed through the clamping device are added to the core yarn after it leaves the clamping device. As is the case with so-called effect twisting machines, the yarn leaving the drafting system and the clamping device is wrapped with a so-called effect yarn, as is the case, for example, from DE 24 12 390 is shown is intended to be avoided by the present invention. Rather, all components of the later core yarn should be guided through the clamping device in a compact manner in order to be twisted into the finished core yarn immediately after the clamping line. Turned another way, the finished core yarn can already be present at the end of the spinning triangle adjoining the clamping line, but this does not rule out the core yarn being twisted further until it is finally wound onto a yarn cop.

Auch kann gemäß der vorliegenden Erfindung der fertige Core-Garn in seiner Zusammensetzung bereits vor dem Durchlaufen des ersten Fadenführers vorliegen, der sich im Transportverlauf des Garns unmittelbar, also ohne Zwischenschaltung weiterer Einrichtung der Ringspinnmaschine an die Klemmeinrichtung bzw. die Klemmlinie anschließt.According to the present invention, the finished core yarn can also be present in its composition before it passes through the first thread guide, which connects directly to the clamping device or the clamping line in the transport path of the yarn, i.e. without the interposition of further equipment on the ring spinning machine.

Gemäß einer Ausführungsform kann der Faserverband und der zumindest eine Faden unmittelbar nach dem Verlassen der Klemmeinrichtung einen Fadenführer durchlaufen, der gegenüber einer Rotationsachse einer der Klemmrollen im Wesentlichen die gleiche axiale Position einnimmt wie eine Nut. Hierdurch soll erreicht werden, dass der vom Fadenführer den Garnbestandteilen aufgezwungene Transportweg nicht dazu führt, dass der in der Nut aufgenommene Faden beim Verlassen der Nut, deren Wandungen kontaktiert und diese somit verschleißt. Ein weiterer mit dieser Anordnung des Fadenführers einhergehender Vorteil besteht darin, dass der Fadenführer die von der Drehungserteilungseinrichtung hervorgerufene Verdrehung des Fadens möglichst wenig beeinflusst, sodass sich die Verdrehung des Fadens möglichst bis über die Klemmlinie hinaus fortsetzt, der Faden also bereits dann einer Drehungsunterteilung unterworfen sein kann, bevor oder während er die Klemmlinie passiert.According to one embodiment, the fiber structure and the at least one thread can pass through a thread guide immediately after leaving the clamping device, which essentially occupies the same axial position as a groove relative to an axis of rotation of one of the clamping rollers. The aim of this is to ensure that the transport path imposed on the yarn components by the thread guide does not result in the thread picked up in the groove coming into contact with its walls when leaving the groove and thus wearing them out. A further advantage associated with this arrangement of the thread guide is that the thread guide influences the twisting of the thread caused by the rotation imparting device as little as possible, so that the twisting of the thread continues as far as possible beyond the clamping line, so that the thread is then subject to a subdivision of rotation can before or while it passes the clamping line.

Falls mehrere Fäden durch mehrere Nuten an der Klemmlinie vorbeigeführt werden sollen, kann dieser Fadenführer zu einer bevorzugten Nut in der oben beschriebenen Weise positioniert werden, während die anderen, versetzt dazu angeordneten Nuten nahe der erstgenannten Nut angeordnet werden können, um die oben beschriebenen Einflüsse zu minimieren.If several threads are to be guided past the clamping line through several grooves, this thread guide can be positioned to a preferred groove in the manner described above, while the other grooves arranged offset thereto can be arranged near the first-mentioned groove in order to achieve the influences described above minimize.

Wie voranstehend bereits angedeutet wurde, kann die Klemmlinie gemäß einer weiteren Ausführungsform der vorliegenden Erfindung mehrfach durch zwei oder mehrere Nuten unterbrochen sein, welche beabstandet zueinander in die Umfangsfläche einer oder aber auch unterschiedlicher Klemmrollen eingearbeitet sind. Auch kann die Klemmlinie an einer oder mehreren Stellen durch zwei gegenüberliegende, an den Umfangsflächen beider Klemmrollen umlaufende Nuten unterbrochen sein. Hier sei zu erwähnen, dass Klemmrollenpaare gewöhnlicherweise durch eine Antriebsrolle aus einem Metallwerkstoff und einer gegenüber der Antriebsrolle vorgespannten Druckrolle aus einem Gummiwerkstoff gebildet werden. Die ein oder mehrere Nuten können in beliebiger Weise in eine oder beide dieser Rollen eingearbeitet sein.As already indicated above, according to a further embodiment of the present invention, the clamping line can be interrupted several times by two or more grooves, which are machined into the peripheral surface of one or different clamping rollers at a distance from one another. The clamping line can also be formed at one or more points by two opposite grooves running around the circumferential surfaces of both clamping rollers be interrupted. It should be mentioned here that pairs of clamping rollers are usually formed by a drive roller made of a metal material and a pressure roller made of a rubber material that is prestressed relative to the drive roller. The one or more grooves can be incorporated in any way into one or both of these rollers.

Ferner ist es vorstellbar, dass zumindest eine oder auch mehrere Nuten im Querschnitt einen ebenen oder konkaven Bodenbereich aufweist, dessen axiale Erstreckung parallel zur Rotationsachse der Klemmrolle wenigstens den einfachen, insbesondere wenigstens den doppelten Durchmesser eines von der Nut aufzunehmenden Fadens beträgt. Wie weiter oben bereits angedeutet wurde, ist es von Vorteil, dass ein in einer Nut aufgenommener Faden nach Möglichkeit keine Seitenwand der Nut kontaktiert, um unnötigen Verschleiß zu vermeiden. Um dies zu erreichen, können die Seitenwandungen der Nut ausreichend voneinander beabstandet werden. Des Weiteren wäre es denkbar, den Faden mittels einer geeigneten Ausformung des NutBodens in der Nut zu zentrieren, um Kontakt mit den Seitenwänden der Nut möglichst zu vermeiden. Hier wäre es denkbar, dass der Nut-Boden zumindest abschnittsweise konkav ausgeformt ist oder keilförmig zusammenlaufende Teilabschnitte aufweist. Andererseits soll jedoch eine Klemmwirkung auf den Faden ähnlich wie bei einer Keilriemenscheibe vermieden werden, um den Faden selbst ebenso wie dessen Transport nicht zu beeinträchtigen.Furthermore, it is conceivable that at least one or more grooves have a flat or concave bottom region in cross section, the axial extent of which, parallel to the axis of rotation of the clamping roller, is at least one, in particular at least twice, the diameter of a thread to be picked up by the groove. As already indicated above, it is advantageous that a thread received in a groove, if possible, does not contact any side wall of the groove in order to avoid unnecessary wear. To achieve this, the side walls of the groove can be sufficiently spaced apart. Furthermore, it would be conceivable to center the thread in the groove by means of a suitable shape of the groove bottom in order to avoid contact with the side walls of the groove as much as possible. Here it would be conceivable that the groove bottom is at least partially concave or has partial sections that converge in a wedge shape. On the other hand, however, a clamping effect on the thread, similar to that of a V-belt pulley, should be avoided in order not to impair the thread itself or its transport.

Um vor der Klemmlinie ein problemloses Einlaufen des Fadens in die Nut zu begünstigen, kann diese so ausgestaltet sein, dass deren axiale Erstreckung parallel zur Rotationsachse der jeweiligen Klemmrolle mit zunehmendem Abstand zur Rotationsachse zunimmt. Anders ausgedrückt kann sich der Querschnitt der Nut zur Umfangsfläche der Klemmrolle hin zumindest abschnittsweise aufweiten. Denkbar wäre hierfür ein "angefaster" oder abgerundeter Übergang der Nut-Seitenwände zur Rollen-Oberfläche hin, ebenso wie im Querschnitt auseinanderlaufende Nut-Seitenwände.In order to promote problem-free entry of the thread into the groove in front of the clamping line, this can be designed in such a way that its axial extent parallel to the axis of rotation of the respective clamping roller increases with increasing distance from the axis of rotation. In other words, the cross section of the groove can widen at least in sections towards the peripheral surface of the clamping roller. What would be conceivable for this would be a "chamfered" or rounded transition of the groove side walls towards the roller surface, as well as groove side walls that diverge in cross section.

Die zumindest eine Nut ist von dem Abschnitt der Klemmlinie beabstandet, in welchem der Faserverband nach dem Verlassen des Streckwerks von den einander kontaktierenden Klemmrollen klemmend in Eingriff genommen wird. Hierdurch wird vermieden, dass sich die für den Faden bereitgestellte Nut mit sich aus dem Faserverband lösenden Stapelfasern zusetzt und somit für die Fadenführung unbrauchbar wird. Andererseits ist ein geringer Abstand der Nut zum den Faserverband in Eingriff nehmenden Abschnitt der Klemmlinie anzustreben, da mit geringer werdendem Abstand auch die notwendige Stapelfaserlänge verarbeitbarer Faserverbände abnimmt. Da der die Nut verlassende Faden letztendlich vom Stapelfaserverband umwickelt werden soll, muss letzterer nach dem Verlassen der Klemmlinie an den Faden herangeführt werden. Je weiter die Nut vom den Stapelfaserverband in Eingriff nehmenden Klemmlinienabschnitt beabstandet ist, steigt auch der für den Stapelfaserverband zurückzulegende Weg und letzten Endes auch die Gefahr, dass dieser abreißt. Gemäß der vorliegenden Erfindung kann dieser Abstand also in Abhängigkeit der zu verarbeitenden Stapelfaserlänge gewählt werden. Erfindungsgemäß kann die axiale Lage der Nut durch axiales Verschieben der entsprechenden Klemmrolle in der Ringspinnmaschine variiert werden. Zusätzlich wäre auch der Einsatz unterschiedlicher Klemmrollen mit in axialer Richtung unterschiedlich angeordneten Nuten vorstellbar.The at least one groove is spaced from the section of the clamping line in which the fiber structure is clampingly engaged by the mutually contacting clamping rollers after leaving the drafting system. This prevents the groove provided for the thread from becoming clogged with staple fibers detaching from the fiber structure and thus becoming unusable for thread guidance. On the other hand, a small distance between the groove and the section of the clamping line engaging the fiber structure should be aimed for, since as the distance becomes smaller, the necessary staple fiber length of processable fiber structures also decreases. Since the thread leaving the groove is ultimately intended to be wrapped by the staple fiber structure, the latter must be brought close to the thread after leaving the clamping line. The further the groove is spaced from the clamping line section engaging the staple fiber assembly, the path to be covered by the staple fiber assembly increases and ultimately the risk of it tearing off also increases. According to the present invention, this distance can be selected depending on the staple fiber length to be processed. According to the invention, the axial position of the groove can be varied by axially moving the corresponding clamping roller in the ring spinning machine. In addition, the use of different clamping rollers with grooves arranged differently in the axial direction would also be conceivable.

Da sich der oder die eine durch die zumindest eine Nut geführten Fäden der Klemmlinie und somit auch dem klemmenden Eingriff zwischen den Klemmrollen entziehen, können diese gegenüber dem Faserverband in beliebiger Weise über- aber auch unterliefert werden, also eine beliebig größere bzw. beliebig geringere Liefergeschwindigkeit beim Hindurchtreten durch die Klemmeinrichtung aufweisen. Da gemäß einer bevorzugten Ausführungsform eine über die Länge hinweg vollständige Belegung des zumindest einen Fadens durch den Stapelfaserverband gewünscht ist, kann bei einer solchen Ausführungsform der Faden gegenüber dem Stapelfaserverband unterliefert werden. Da der Faserverband hierbei mit einer größeren Liefergeschwindigkeit aus der Klemmeinrichtung austritt, kann sich dieser um den zumindest einen Faden herumlegen und diesen letztendlich vollständig bedecken. Beispielsweise kann der Faden eine um 5%, 10%, 15% oder gar 20% geringere Liefergeschwindigkeit haben als der Faserverband, also um 5%, 10%, 15% oder gar 20% unterliefert werden.Since the one or more threads guided through the at least one groove escape the clamping line and thus also the clamping engagement between the clamping rollers, they can be over-delivered or under-delivered compared to the fiber structure in any way, i.e. an arbitrarily higher or arbitrarily lower delivery speed when passing through the clamping device. Since, according to a preferred embodiment, complete coverage of the at least one thread by the staple fiber association is desired over the length, in such an embodiment the thread can be delivered below the staple fiber association. Since the fiber structure emerges from the clamping device at a greater delivery speed, it can wrap around the at least one thread and ultimately cover it completely. For example, the thread can be 5%, 10%, 15% or even 20% have a lower delivery speed than the fiber structure, i.e. under-delivery by 5%, 10%, 15% or even 20%.

Ein weiterer Aspekt der vorliegenden Erfindung betrifft ein Verfahren zur Herstellung eines Core-Garns nach Anspruch 8.A further aspect of the present invention relates to a method for producing a core yarn according to claim 8.

Eine bevorzugte Ausführungsform der vorliegenden Erfindung wird im Folgenden unter Bezugnahme auf die beschriebenen Figuren näher erläutert.A preferred embodiment of the present invention is explained in more detail below with reference to the figures described.

Es zeigen:

Figur 1
Darstellung einer Ringspinnmaschine gemäß der vorliegenden Erfindung;
Figur 2
Detailansicht der Klemmeinrichtung der Ringspinnmaschine aus der Figur 1;
Figur 3
Seitenansicht der Klemmeinrichtung aus der Figur 2.
Show it:
Figure 1
Representation of a ring spinning machine according to the present invention;
Figure 2
Detailed view of the clamping device of the ring spinning machine from the Figure 1 ;
Figure 3
Side view of the clamping device from the Figure 2 .

Die Figur 1 zeigt eine Ringspinnmaschine gemäß der vorliegenden Erfindung, mittels welcher ein auch als Lunte oder Vorgarn bezeichneter Faserverband 2 und ein im vorliegenden Fall als elastisches oder inelastisches bzw. starres Endlosfilament bereitgestellter Faden 4 von Materialvorlagen 1 bzw. 3 abgezogen und zu einem Core-Garn 11 versponnen werden. Der von der Materialvorlage 1 abgezogene Faserverband 2 durchläuft ein zunächst nicht bezeichnetes Einlaufrollenpaar des Streckwerks 5 und wird daraufhin den Streckwerk 5 zugeführt, welches die Stapelfasern des Faserverbands zu einem gewünschten Grad auseinanderzieht. Im Anschluss daran wird der Faserverband 2 einem Auslaufrollenpaar des Streckwerks 5 zugeführt, das im Folgenden als Klemmeinrichtung 6 bezeichnet wird. Die aus einem Metallwerkstoff gefertigte und als Antriebsrolle ausgestaltete Klemmrolle 8 kontaktiert die ihr gegenüber vorgespannte, aus einem Gummiwerkstoff gefertigte und als Druckrolle ausgestaltete Klemmrolle 9 entlang eine Klemmlinie 7, entlang welcher der Faserverband 2 klemmend von den Klemmrollen 8, 9 in Eingriff genommen wird.The Figure 1 shows a ring spinning machine according to the present invention, by means of which a fiber structure 2, also known as a sliver or roving, and a thread 4, which in the present case is provided as an elastic or inelastic or rigid endless filament, are drawn off from material templates 1 or 3 and spun into a core yarn 11 become. The fiber structure 2 pulled off from the material template 1 passes through an initially unnamed pair of inlet rollers of the drafting system 5 and is then fed to the drafting system 5, which pulls the staple fibers of the fiber structure apart to a desired degree. The fiber structure 2 is then fed to a pair of outlet rollers of the drafting system 5, which is referred to below as a clamping device 6. The clamping roller 8, which is made of a metal material and designed as a drive roller, contacts the clamping roller 9, which is prestressed relative to it, is made of a rubber material and is designed as a pressure roller, along a clamping line 7, along which the fiber structure 2 is clamped by the clamping rollers 8, 9.

Unmittelbar nach dem Verlassen der Klemmlinie 7 wird der Faserverband 2 dem Faden 4 zugeführt, welcher mittels einer nicht dargestellten Antriebsvorrichtung von der Materialvorlage 3 abgezogen, über eine nicht bezeichnete Umlenkrolle geführt und zwischen den Klemmrollen 8, 9 durch die Klemmeinrichtung 6 hindurchgeführt wird. Im Gegensatz zum Faserverband 2 wird der Faden 4 von den Klemmrollen 8, 9 jedoch nicht klemmend in Eingriff genommen, sondern wird mittels einer Nut (siehe die Figuren 2 und 3) an der Klemmlinie 7 vorbeigeführt und kann die Klemmeinrichtung daher mit einer Unterlieferung gegenüber dem Faserverband 2 durchlaufen. Noch bevor das aus dem Faserverband 2 und dem Faden 4 bestehende, in seinen Bestandteilen bereits fertige Core-Garn 11 den Fadenführer 14 durchläuft, wird der gegenüber dem Faden 4 überlieferte Faserverband 2 um den Faden 4 herumgelegt, indem die Drehungsverteilungseinrichtung 10 sowohl dem Faserverband 2 als auch dem Faden 4 eine Drehung auferlegt, bevor diese als fertig verdrehter Core-Garn 11 auf den nicht bezeichneten Garn-Kops aufgewickelt werden.Immediately after leaving the clamping line 7, the fiber structure 2 is fed to the thread 4, which is pulled off from the material template 3 by means of a drive device (not shown), guided over an unnamed deflection roller and passed between the clamping rollers 8, 9 through the clamping device 6. In contrast to the fiber structure 2, the thread 4 is not engaged by the clamping rollers 8, 9 in a clamping manner, but is instead clamped by means of a groove (see the Figures 2 and 3 ) passed the clamping line 7 and can therefore pass through the clamping device with an under-delivery compared to the fiber structure 2. Even before the core yarn 11, which consists of the fiber structure 2 and the thread 4 and is already finished in its components, passes through the thread guide 14, the fiber structure 2 that has been delivered compared to the thread 4 is placed around the thread 4 by the rotation distribution device 10 being applied to both the fiber structure 2 as well as the thread 4, a rotation is imposed before they are wound up as the finished twisted core yarn 11 on the unnamed yarn cop.

Die Figur 2 zeigt eine Detailansicht der Klemmeinrichtung 6 der in der Figur 1 dargestellten Ringspinnmaschine entlang der Rotationsachsen R der Klemmrollen 8, 9. Es ist zu sehen, dass der von der Materialvorlage 3 abgezogene Faden 4 zunächst über eine nicht bezeichnete Umlenkrolle geführt wird und sich beim Ablösen von deren Umfangsfläche in eine Nut 13 einlegt, welche in die Umfangsfläche 12 der Klemmrolle 9 eingearbeitet ist und diese umfänglich umläuft. Da die Tiefe der Nut 13 größer ist als der Durchmesser des Fadens 4, wird der Faden 4 in der Nut 13 an der Klemmlinie 7 vorbeigeführt und folglich nicht von den Klemmrollen 8, 9 in Eingriff genommen, wie das für den Faserverband 2 der Fall ist. Letzterer wird nämlich zwischen den Umfangsflächen 12 und 16 der Klemmrollen 9 bzw. 8 entlang der Klemmlinie 7 eingeklemmt.The Figure 2 shows a detailed view of the clamping device 6 in the Figure 1 shown ring spinning machine along the rotation axes R of the clamping rollers 8, 9. It can be seen that the thread 4 pulled off from the material template 3 is first guided over an unnamed deflection roller and, when detached from its peripheral surface, is inserted into a groove 13, which is in the Circumferential surface 12 of the clamping roller 9 is incorporated and runs circumferentially. Since the depth of the groove 13 is greater than the diameter of the thread 4, the thread 4 is guided past the clamping line 7 in the groove 13 and is therefore not engaged by the clamping rollers 8, 9, as is the case for the fiber structure 2 . The latter is namely clamped between the peripheral surfaces 12 and 16 of the clamping rollers 9 and 8 along the clamping line 7.

Die Figur 3 zeigt eine Seitenansicht auf die Sichtebene A-A aus der Figur 2. Es ist zu sehen, dass der Faserverband 2 und der Faden 4 parallel und senkrecht zu den Rotationsachsen R der Klemmrollen 8, 9 zwischen die Klemmrollen 8, 9 geführt werden. Der Faserverband 2 wird entlang des Abschnitts 15 der Klemmlinie 7 klemmend von den Klemmrollen 8 und 9 in Eingriff genommen. Der Faden 4 kann die Klemmlinie 7 ungehindert und von der Drehung der Klemmrollen 8, 9 unbeeinflusst passieren, indem er sich in die Nut 13 einlegt, die entlang der Rotationsachse R der Klemmrolle 9 vom Abschnitt 15 beabstandet ist. Ein Zusetzen der Nut 13 durch sich aus dem Faserverband 2 lösenden Stapelfasern wird durch den Abstand der Nut 13 um Abschnitt 15 wirkungsvoll vermieden.The Figure 3 shows a side view of the viewing plane AA from the Figure 2 . It can be seen that the fiber structure 2 and the thread 4 are guided between the clamping rollers 8, 9 parallel and perpendicular to the axes of rotation R of the clamping rollers 8, 9. The fiber structure 2 is clamped along the section 15 of the clamping line 7 by the clamping rollers 8 and 9. The thread 4 can Clamping line 7 can pass unhindered and unaffected by the rotation of the clamping rollers 8, 9 by inserting itself into the groove 13, which is spaced from section 15 along the axis of rotation R of the clamping roller 9. Clogging of the groove 13 by staple fibers coming loose from the fiber structure 2 is effectively avoided by the distance between the groove 13 and section 15.

Nach dem Passieren der Klemmlinie 7 wird der Faserverband 2 dem Faden 4 zugeführt und legt sich derart um den Faden, dass dieser über seine gesamte Länge hinweg gänzlich vom Faserverband 2 belegt ist. Dies wird dadurch erreicht, indem der Faden 4 gegenüber dem Faserverband 2 zu einem gewissen Grad unterliefert wird, also eine geringere Liefergeschwindigkeit aufweist als der Faserverband 2. Somit hat der Faserverband 2 eine genügend große Lieferlänge, um sich um den Faden 4 herumzulegen. Ferner wird durch die Platzierung des unmittelbar an die Klemmlinie 7 anschließenden Fadenführers 14 in einer im Wesentlichen gleichen axialen Position wie die Nut 13 (im Wesentlichen "unterhalb" der Nut 13) erreicht, dass der Faden 4 zum Hauptangriffspunkt für die Drehungserteilung wird und sich der Faserverband 2 somit zwangsläufig um den Faden 4 herumlegt. Durch die Positionierung der Nut 13 nahe des den Faserverband 2 klemmenden Abschnitts 15 ist es möglich, dass sich der Faserverband 2 um den Faden 4 herumlegen lässt, ohne abzureißen, indem sich Stapelfasern in Längsrichtung voneinander lösen. Noch bevor der Faserverband 2 zusammen mit dem Faden 4 den Fadenführer 14 durchläuft, liegt bereits der fertige Core-Garn 11 mit sämtlichen seiner Bestandteile vor, wie er schlussendlich auf einen Garn-Kops aufgewickelt wird. Die von der Drehungsverteilungseinrichtung 10 hervorgerufene, bereits im Bereich der Klemmlinie 7 beginnende Verdrehung des Faserverbands 2 zusammen mit dem Faden 4 setzt sich jedoch auch noch nach dem Durchlaufen des Fadenführers 14 fort.After passing the clamping line 7, the fiber structure 2 is fed to the thread 4 and wraps around the thread in such a way that it is completely covered by the fiber structure 2 over its entire length. This is achieved in that the thread 4 is under-delivered compared to the fiber structure 2 to a certain extent, i.e. has a lower delivery speed than the fiber structure 2. The fiber structure 2 thus has a sufficiently large delivery length to wrap around the thread 4. Furthermore, the placement of the thread guide 14 immediately adjacent to the clamping line 7 in a substantially same axial position as the groove 13 (essentially "below" the groove 13) ensures that the thread 4 becomes the main point of attack for imparting rotation and the Fiber structure 2 therefore inevitably lies around the thread 4. By positioning the groove 13 near the section 15 clamping the fiber structure 2, it is possible that the fiber structure 2 can be placed around the thread 4 without tearing off by separating staple fibers from one another in the longitudinal direction. Even before the fiber structure 2 passes through the thread guide 14 together with the thread 4, the finished core yarn 11 with all of its components is already there, as it is ultimately wound onto a yarn cop. However, the twisting of the fiber structure 2 together with the thread 4, which is caused by the rotation distribution device 10 and begins in the area of the clamping line 7, continues even after the thread guide 14 has passed through.

Claims (8)

  1. Ring spinning machine for producing a core yarn (11), having:
    - a first material template (1) for a fibre composite (2) made of staple fibres;
    - at least one further material template (3) for at least one thread (4) to be fed to the fibre composite (2);
    - a drawing frame (5) for drawing the fibre composite (2);
    - a clamping device (6) having clamping rollers (8, 9) in contact with one another in a clamping line (7), wherein the clamping device (6) is passed through by the fibre composite (2) leaving the drawing frame (5) and the at least one thread (4), and wherein both the fibre composite (2) and the thread (4) run between the clamping rollers (8, 9);
    - a rotation distribution device (10) that twists the fibre composite (2) leaving the clamping device (6) and the at least one thread (4) leaving the clamping device (6) into a core yarn (11) by wrapping the thread (4) with the fibre composite (22); wherein at least one surrounding groove (13) that interrupts the clamping line (7) is formed on the peripheral surface (12) of at least one of the clamping rollers (8, 9), said groove receiving the at least one thread (4) as it runs between the clamping rollers (8, 9), and guiding it past the clamping line (7) without said thread being engaged via clamping by the clamping rollers (8, 9) in contact with one another, characterised in that
    the spacing of the at least one groove (13) from the portion of the clamping line (7) engaging the fibre composite (2) by clamping can be varied according to the staple fibre length of the fibre composite (2) by axially shifting the clamping roller (8, 9) having the groove (13).
  2. Ring spinning machine according to claim 1, wherein all components of the finished core yarn (11) run through the clamping device (6) and/or are combined before running through a thread guide (14) directly connected to the clamping device (6).
  3. Ring spinning machine according to claim 1 or 2, wherein the fibre composite (2) and the at least one thread (4) run through a thread guide (14) immediately after leaving the clamping device (6), said thread guide occupying substantially the same axial position in relation to an axis of rotation (R) of one of the clamping rollers (8, 9) as the at least one groove (13).
  4. Ring spinning machine according to one of claims 1 to 3, wherein the clamping line (7) is interrupted by two surrounding grooves (13) located opposite each other on the peripheral surfaces (12, 16) of the respective clamping rollers (10, 11), and/or the clamping line (7) is interrupted several times by two or more grooves (13) that are axially spaced apart from one another.
  5. Ring spinning machine according to one of claims 1 to 4, wherein the at least one groove (13) has a flat or concave bottom region in cross-section, the axial extension of said bottom region along the axis of rotation (R) of the clamping roller (8, 9) equalling at least the diameter, in particular at least double the diameter of a thread (4) received by the groove (13).
  6. Ring spinning machine according to claim 1 or 5, wherein the axial extension of the at least one groove (13) increases with increasing radial spacing from the axis of rotation (R) of the respective clamping roller (8, 9).
  7. Ring spinning machine according to one of claims 1 to 6, designed to under-deliver at least one thread (4) to be fed to the fibre composite (2) and received by the at least one groove (13) in relation to the fibre composite (2).
  8. Method for producing a core yarn (11) on a ring spinning machine, having the following steps:
    - providing a fibre composite (2) made of staple fibres;
    - providing at least one thread (4) to be fed to the fibre composite (2);
    - drawing the fibre composite (2) in a drawing frame (5);
    - feeding the fibre composite (2) leaving the drawing frame (5) and the at least one thread (4) through a clamping device (6) having clamping rollers (8, 9) in contact with one another in a clamping line (7), such that both the fibre composite (2) and the thread (4) run through between the clamping rollers (8, 9);
    - twisting the fibre composite (2) leaving the clamping device (6) and the at least one thread (4) leaving the clamping device (6) into a core yarn (11) by wrapping the thread (4) with the fibre composite (2);
    wherein the at least one thread (4) is received, as it runs between the clamping rollers (8, 9), by a groove (13) surrounding at least one of the clamping rollers (8, 9) on the peripheral surface (12) and interrupting the clamping line (7), and is guided past the clamping line (7) without said thread being engaged via clamping by the clamping rollers (8, 9) in contact with one another, characterised in that
    the spacing of the at least one groove (13) from the portion of the clamping line (7) engaging the fibre composite (2) by clamping is varied according to the staple fibre length of the fibre composite (2) by axially shifting the clamping roller (8, 9) having the groove (13).
EP20213398.9A 2019-12-23 2020-12-11 Ring spinning machine and method for producing a core yarn Active EP3842578B1 (en)

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DE102019135719.5A DE102019135719B4 (en) 2019-12-23 2019-12-23 Device and method for producing a core yarn

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CN115323535B (en) * 2022-08-25 2023-09-05 无锡市新康纺机有限公司 Twisting machine capable of automatically doffing

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CN102787402B (en) * 2012-07-22 2014-12-10 东华大学 Intermittent overfeeding composite spinning device with single inclined plane groove and method

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EP4273310A3 (en) 2024-01-10
EP3842578A1 (en) 2021-06-30
EP4273310A2 (en) 2023-11-08
DE102019135719B4 (en) 2023-11-30
DK3842578T3 (en) 2024-02-19
PT3842578T (en) 2024-01-19
DE102019135719A1 (en) 2021-06-24

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