EP3842578A1 - Method and device for producing a core yarn - Google Patents

Method and device for producing a core yarn Download PDF

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Publication number
EP3842578A1
EP3842578A1 EP20213398.9A EP20213398A EP3842578A1 EP 3842578 A1 EP3842578 A1 EP 3842578A1 EP 20213398 A EP20213398 A EP 20213398A EP 3842578 A1 EP3842578 A1 EP 3842578A1
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EP
European Patent Office
Prior art keywords
clamping
thread
fiber structure
groove
rollers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP20213398.9A
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German (de)
French (fr)
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EP3842578B1 (en
Inventor
Ludger Budde
Oliver Dorn
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Peppermint Holding GmbH
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Peppermint Holding GmbH
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Publication date
Application filed by Peppermint Holding GmbH filed Critical Peppermint Holding GmbH
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 an apparatus and a method for producing a core yarn.
  • the invention also relates to a correspondingly produced core yarn and a textile, in particular items of clothing comprising such a core yarn.
  • Core yarns consist of several components, for example a filament, which forms the core of the later core yarn, is wrapped 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 at the same time dimensionally stable fabrics which, for example, also offer the comfort of cotton.
  • the filament runs over a deflection roller into a pair of pinch rollers, which clampingly engages the filament along a pinch line as well as a staple fiber strand previously stretched in a drafting system.
  • the two components i.e. the filament and the staple fiber structure, are equally detected by a rotation which is caused by a rotation dividing device that revolves around a yarn cop and winds the yarn on the cop.
  • the DE 198 04 341 A1 shows such a device and a corresponding method.
  • the filament like the staple fiber strand, is engaged by the clamping line, the respective delivery speeds of the components cannot be varied with respect to one another, so that no influence can be exercised on where the filament will come to lie in the subsequent yarn.
  • the filament In conventional core yarns, for example, the filament repeatedly appears on the surface of the finished yarn and is therefore partially covered over its length by staple fiber strand.
  • a full encasement of a staple fiber bandage not only makes the yarn core completely invisible, which in particular improves the possibility of dyeing the yarn, but also removes it from direct contact, for example with the skin.
  • the features of the individual aspects presented below relating to a ring spinning machine, a method and a core yarn can be combined as desired with the features of a respective other aspect.
  • the manufacturing method presented below can accordingly include any features that are described in connection with the ring spinning machine or the core yarn also described below.
  • the ring spinning machine according to the invention is characterized by 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 guides it past the clamping line without that this is clamped into engagement by the contacting pinch rollers.
  • 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 strand, passes between the two clamping rollers, which roll off one another along a clamping line.
  • this at least one thread is not pinched by the pinch rollers along the pinch line like the staple fiber bundle, but is withdrawn from the clamping action by running into a groove before or at the latest at the pinch line, which at least in the outer jacket surface one of the pinch rollers is incorporated. In this way, the at least one thread can pass the nipping line without the nipping rollers intervening.
  • the at least one thread to be fed to the fiber structure and forming the subsequent yarn core can also comprise a staple fiber structure or consist of such a staple fiber structure.
  • the at least one thread can also comprise or consist of one or more continuous filaments.
  • the at least one thread can comprise / be an inelastic endless filament or comprise / be an elastic endless filament, wherein the at least one thread in particular can also comprise 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 supplied thread can be, for example, an elastic or inelastic continuous filament which is engaged by the pinch rollers at the pinch line.
  • such a conventionally supplied thread can be engaged in that 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 directly adjoining the clamping device.
  • the first alternative is intended to express that no further constituents or components which have not passed through the clamping device are added to the core yarn after it has left the clamping device.
  • the yarn leaving the drafting system and the clamping device is wrapped with a so-called fancy yarn as is the case for example from the DE 24 12 390 is shown is just to be avoided by the present invention. Rather, all of the components of the later core yarn should be passed 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 possibility that the core yarn is twisted even further until it is finally wound onto a yarn head.
  • the finished core yarn can already be present in its composition before it passes through the first thread guide, which is directly connected to the clamping device or the clamping line during the transport of the yarn, i.e. without the interposition of further devices of 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 thread guide essentially assumes the same axial position as a groove with respect to an axis of rotation of one of the clamping rollers.
  • This is intended to ensure that the transport path imposed on the yarn components by the thread guide does not lead to the thread received in the groove coming into contact with the walls when it leaves the groove and thus wearing them.
  • Another advantage associated with this arrangement of the thread guide is that the thread guide influences the twisting of the thread caused by the twist dividing 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 already subject to a twist division before or while it passes the nip line.
  • this thread guide can be positioned to a preferred groove in the manner described above, while the other, offset grooves can be arranged near the first-mentioned groove in order to influence the above-described influences minimize.
  • the clamping line can be interrupted several times by two or more grooves which are incorporated into the circumferential surface of one or also different clamping rollers at a distance from one another.
  • the clamping line can also be at one or more points through two opposing 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, which is pretensioned with respect to the drive roller.
  • the one or more grooves can be incorporated into one or both of these roles in any desired manner.
  • At least one or more grooves have a flat or concave bottom area in cross section, the axial extent of which, parallel to the axis of rotation of the pinch roller, is at least the single, in particular at least twice the diameter of a thread to be picked up by the groove.
  • a thread received in a groove does not make contact with any side wall of the groove, if possible, in order to avoid unnecessary wear.
  • the side walls of the groove can be sufficiently spaced from one another.
  • the groove bottom prefferably be concave at least in sections or to have partial sections converging 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 extension 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 circumferential surface of the pinch roller.
  • a "chamfered” or rounded transition of the groove side walls to the roller surface would be conceivable for this purpose, as well as groove side walls which diverge in cross section.
  • the at least one groove is spaced apart from the section of the clamping line in which the fiber structure is clamped into engagement by the clamping rollers contacting each other after leaving the drafting system. This prevents the groove provided for the thread from becoming clogged with staple fibers loosening 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 the necessary staple fiber length of processable fiber structures also decreases as the distance decreases. Since the thread leaving the groove is ultimately to be wrapped by the staple fiber bundle, the latter must be brought up to the thread after leaving the clamping line.
  • this distance can therefore be selected as a function of the length of the staple fiber to be processed. It would be conceivable to vary the axial position of the groove for this purpose by axially displacing the corresponding pinch roller in the ring spinning machine. As an alternative or in addition, the use of different clamping rollers with grooves arranged differently in the axial direction would also be conceivable.
  • the threads passed through the at least one groove elude the nipping line and thus also the nipping engagement between the nipping rollers, these can be delivered over or under the fiber structure in any way, i.e. any higher or lower delivery speed have when passing through the clamping device. Since, according to a preferred embodiment, a complete occupation of the at least one thread over the length is desired by the staple fiber structure, in such an embodiment the thread can be supplied below the staple fiber structure. Since the fiber structure emerges from the clamping device at a higher delivery speed, it can wrap itself around the at least one thread and ultimately cover it completely. For example, the thread can have a 5%, 10%, 15% or even 20% have a lower delivery speed than the fiber structure, i.e. by 5%, 10%, 15% or even 20%.
  • the core yarn according to the invention can be distinguished from previously known core yarns in that the at least one thread is completely covered by the fiber structure over its length and therefore does not come to the surface of the finished core yarn.
  • the ring spinning machine according to the invention and / or the The method according to the invention can be designed to produce a core yarn as described above, the fineness of which is less than 1300 dtex, in particular less than 1000 dtex, more preferably less than 580 dtex.
  • the core yarn according to the invention can be used, for example, in the production of textiles, in particular garments or cover fabrics for, for example, upholstered furniture or vehicle or aircraft equipment.
  • the Figure 1 shows a ring spinning machine according to the present invention, by means of which a fiber structure 2, also referred to as roving or roving, and a thread 4, provided in the present case as elastic or inelastic or rigid continuous filament, are drawn off from material templates 1 or 3 and spun to form a core yarn 11 become.
  • the fiber structure 2 withdrawn from the material template 1 passes through an initially unmarked pair of infeed 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. Subsequently, the fiber structure 2 is fed to an outlet roller pair of the drafting system 5, which is referred to below as the clamping device 6.
  • the clamping roller 8 made of a metal material and designed as a drive roller contacts the clamping roller 9, which is pretensioned opposite it and is made of a rubber material and 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 from the material template 3 by means of a drive device (not shown), guided over an undesignated 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 moved by means of a groove (see FIG Figures 2 and 3 ) is guided past the clamping line 7 and can therefore pass through the clamping device with an underdelivery in relation to the fiber structure 2.
  • the fiber structure 2 handed over to the thread 4 is wrapped around the thread 4 by the twist distribution device 10 and the fiber structure 2 as well as a twist is imposed on the thread 4 before they are wound up as a completely twisted core thread 11 on the thread head (not shown).
  • FIG. 6 shows a detailed view of the clamping device 6 in FIG Figure 1 shown ring spinning machine along the axes of rotation R of the pinch rollers 8, 9.
  • the thread 4 withdrawn from the material template 3 is initially guided over an unmarked deflection roller and, when detached from its peripheral surface, is inserted into a groove 13 which is inserted into the Circumferential surface 12 of the clamping roller 9 is incorporated and this rotates 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 consequently 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 plane AA from FIG Figure 2 . It can be seen that the fiber structure 2 and the thread 4 are guided parallel and perpendicular to the axes of rotation R of the pinch rollers 8, 9 between the pinch rollers 8, 9. The fiber structure 2 is clamped by the clamping rollers 8 and 9 along the section 15 of the clamping line 7.
  • the thread 4 can die Pass the clamping line 7 unhindered and unaffected by the rotation of the clamping rollers 8, 9 by inserting itself into the groove 13 which is spaced apart from the section 15 along the axis of rotation R of the clamping roller 9. A clogging of the groove 13 by staple fibers detaching from the fiber structure 2 is effectively avoided by the spacing of the groove 13 around section 15.
  • the fiber structure 2 After passing the clamping line 7, the fiber structure 2 is fed to the thread 4 and wraps itself 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 supplied to a certain extent in relation to the fiber structure 2, that is to say it 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, by placing the thread guide 14 directly adjoining the clamping line 7 in a substantially same axial position as the groove 13 (substantially "below” the groove 13), the thread 4 becomes the main point of application for the rotation distribution and the Fiber structure 2 thus inevitably wraps around thread 4.
  • the fiber structure 2 By positioning the groove 13 near the section 15 clamping the fiber structure 2, it is possible for the fiber structure 2 to be placed around the thread 4 without tearing, in that staple fibers detach from one another in the longitudinal direction. Even before the fiber structure 2, together with the thread 4, passes through the thread guide 14, the finished core yarn 11 with all of its components is already present, as it is ultimately wound onto a yarn cop. The twisting of the fiber strand 2 together with the thread 4 caused by the rotation distribution device 10 and already beginning in the area of the clamping line 7, however, continues even after the thread guide 14 has passed through.

Abstract

Die vorliegende Erfindung betrifft eine Ringspinnmaschine (1) und ein Verfahren zur Herstellung eines Core-Garns (11), wobei eine Klemmeinrichtung (6) mit in einer Klemmlinie (7) einander kontaktierenden Klemmrollen (8, 9) von einem ein Streckwerk (5) verlassenden Faserverband (2) und zumindest einem dem Faserverband (2) zuzuführenden Faden (4), insbesondere Endlosfilament durchlaufen wird, und wobei die Klemmlinie (7) durch zumindest eine an der Umfangsfläche (12) zumindest einer der Klemmrollen (8, 9) umlaufende Nut (13) unterbrochen ist, welche den zumindest einen Faden (4) beim Durchlaufen der Klemmeinrichtung (6) aufnimmt und an der Klemmlinie (7) vorbeiführt, ohne dass dieser von den einander kontaktierenden Klemmrollen (8, 9) klemmend in Eingriff genommen wird. Die vorliegende Erfindung betrifft ferner ein entsprechend hergestelltes Core-Garn (11).The present invention relates to a ring spinning machine (1) and a method for producing a core yarn (11), wherein a clamping device (6) with clamping rollers (8, 9) contacting one another in a clamping line (7) of a drafting device (5) leaving fiber structure (2) and at least one thread (4) to be fed to the fiber structure (2), in particular continuous filament, is passed through, and wherein the clamping line (7) is passed through at least one of the clamping rollers (8, 9) on the circumferential surface (12) Groove (13) is interrupted, which receives the at least one thread (4) as it passes through the clamping device (6) and guides it past the clamping line (7) without it being clamped into engagement by the clamping rollers (8, 9) contacting each other . The present invention also relates to a correspondingly produced core yarn (11).

Description

Die vorliegende Erfindung betrifft eine Vorrichtung und ein Verfahren zur Herstellung eines Core-Garns. Die Erfindung betrifft ferner ein entsprechend hergestelltes Core-Garn und eine Textilie, insbesondere Kleidungsstücke umfassend ein solches Core-Garn.The present invention relates to an apparatus and a method for producing a core yarn. The invention also relates to a correspondingly produced core yarn and a textile, in particular items of clothing comprising such 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 wrapped 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 at the same time dimensionally stable fabrics which, for example, also offer the 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 over a deflection roller into a pair of pinch rollers, which clampingly engages the filament along a pinch line as well as a staple fiber strand 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 detected by a rotation which is caused by a rotation dividing device that revolves around a yarn cop and winds the yarn on the cop. The DE 198 04 341 A1 shows such a device and a corresponding method. Since the filament, like the staple fiber strand, is engaged by the clamping line, the respective delivery speeds of the components cannot be varied with respect to one another, so that no influence can be exercised on where the filament will come to lie in the subsequent yarn. In conventional core yarns, for example, the filament repeatedly appears on the surface of the finished yarn and is therefore partially covered over its length by staple fiber strand.

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 completely covered over its entire length by a staple fiber structure, i.e. does not appear regularly on the surface as with previous core yarns. Particularly when using one or more filaments as the yarn core, a full encasement of a staple fiber bandage not only makes the yarn core completely invisible, which in particular improves the possibility of dyeing the yarn, but also removes it from direct contact, for example with the skin.

Diese Aufgabe wird durch eine Ringspinnmaschine gemäß dem Patentanspruch 1 und ein Verfahren gemäß dem Patentanspruch 9 gelöst.This object is achieved by a ring spinning machine according to claim 1 and a method according to claim 9.

Die Merkmale der im Folgenden vorgestellten Einzelaspekte betreffend eine Ringspinnmaschine, ein Verfahren und ein Core-Garn können hierbei beliebig mit den Merkmalen eines jeweils anderen Aspekts kombiniert werden. Beispielsweise kann das im Folgenden vorgestellte Herstellungsverfahren sinngemäß beliebige Merkmale umfassen, welche im Zusammenhang mit der ebenfalls im Folgenden beschriebenen Ringspinnmaschine oder dem Core-Garn beschrieben werden.The features of the individual aspects presented below relating to a ring spinning machine, a method and a core yarn can be combined as desired with the features of a respective other aspect. For example, the manufacturing method presented below can accordingly include any features that are described in connection with the ring spinning machine or the core yarn also described below.

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 continuous filament;
  • a drafting device for drafting the fiber structure;
  • a clamping device with clamping rollers contacting one another in a clamping line, the clamping device being traversed by the fiber structure leaving the drafting system and the at least one thread;
  • a twist distribution device which twists the fiber structure leaving the clamping device and the at least one thread leaving the clamping device to form a core yarn.

Gegenüber bisherigen Ringspinnmaschinen für die Herstellung von Core-Garnen zeichnet sich die erfindungsgemäße Ringspinnmaschine durch zumindest eine an der Umfangsfläche zumindest einer der Klemmrollen umlaufende und die Klemmlinie unterbrechende Nut aus, 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.Compared to previous ring spinning machines for the production of core yarns, the ring spinning machine according to the invention is characterized by 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 guides it past the clamping line without that this is clamped into engagement by the contacting pinch rollers.

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.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 strand, passes between the two clamping rollers, which roll off one another along a clamping line. In contrast to previous solutions, however, this at least one thread is not pinched by the pinch rollers along the pinch line like the staple fiber bundle, but is withdrawn from the clamping action by running into a groove before or at the latest at the pinch line, which at least in the outer jacket surface one of the pinch rollers is incorporated. In this way, the at least one thread can pass the nipping line without the nipping rollers intervening.

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.At this point it should be noted that the at least one thread to be fed to the fiber structure and forming the subsequent yarn core can also comprise a staple fiber structure or consist of such a staple fiber structure. Alternatively, the at least one thread can also comprise or consist of one or more continuous filaments. In particular, the at least one thread can comprise / be an inelastic endless filament or comprise / be an elastic endless filament, wherein the at least one thread in particular can also comprise 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.It is also 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 fed according to the invention, at least one further thread can also be fed to the fiber structure in a conventional manner. Such a conventionally supplied thread can be, for example, an elastic or inelastic continuous filament which is engaged by the pinch rollers at the pinch line. In particular, such a conventionally supplied thread can be engaged in that 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 directly adjoining 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 constituents or components which have not passed through the clamping device are added to the core yarn after it has left the clamping device. As is customary with so-called fancy twisting machines, the yarn leaving the drafting system and the clamping device is wrapped with a so-called fancy yarn, as is the case for example from the DE 24 12 390 is shown is just to be avoided by the present invention. Rather, all of the components of the later core yarn should be passed through the clamping device in a compact manner in order to be twisted into the finished core yarn immediately after the clamping line. Turned again differently, 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 possibility that the core yarn is twisted even further until it is finally wound onto a yarn head.

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 already be present in its composition before it passes through the first thread guide, which is directly connected to the clamping device or the clamping line during the transport of the yarn, i.e. without the interposition of further devices of 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 thread guide essentially assumes the same axial position as a groove with respect to an axis of rotation of one of the clamping rollers. This is intended to ensure that the transport path imposed on the yarn components by the thread guide does not lead to the thread received in the groove coming into contact with the walls when it leaves the groove and thus wearing them. Another advantage associated with this arrangement of the thread guide is that the thread guide influences the twisting of the thread caused by the twist dividing 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 already subject to a twist division before or while it passes the nip 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, offset grooves can be arranged near the first-mentioned groove in order to influence the above-described influences 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 incorporated into the circumferential surface of one or also different clamping rollers at a distance from one another. The clamping line can also be at one or more points through two opposing 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, which is pretensioned with respect to the drive roller. The one or more grooves can be incorporated into one or both of these roles in any desired manner.

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.It is also conceivable that at least one or more grooves have a flat or concave bottom area in cross section, the axial extent of which, parallel to the axis of rotation of the pinch roller, is at least the single, 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 does not make contact with any side wall of the groove, if possible, in order to avoid unnecessary wear. To achieve this, the side walls of the groove can be sufficiently spaced from one another. Furthermore, it would be conceivable to center the thread in the groove by means of a suitable shaping of the groove base in order to avoid contact with the side walls of the groove as far as possible. It would be conceivable here for the groove bottom to be concave at least in sections or to have partial sections converging 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 facilitate 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 extension 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 circumferential surface of the pinch roller. A "chamfered" or rounded transition of the groove side walls to the roller surface would be conceivable for this purpose, as well as groove side walls which diverge in cross section.

Gemäß einer weiteren Ausführungsform ist die zumindest eine Nut 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. Es wäre vorstellbar, die axiale Lage der Nut hierfür durch axiales Verschieben der entsprechenden Klemmrolle in der Ringspinnmaschine zu variieren. Alternativ oder zusätzlich wäre auch der Einsatz unterschiedlicher Klemmrollen mit in axialer Richtung unterschiedlich angeordneten Nuten vorstellbar.According to a further embodiment, the at least one groove is spaced apart from the section of the clamping line in which the fiber structure is clamped into engagement by the clamping rollers contacting each other after leaving the drafting system. This prevents the groove provided for the thread from becoming clogged with staple fibers loosening 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 the necessary staple fiber length of processable fiber structures also decreases as the distance decreases. Since the thread leaving the groove is ultimately to be wrapped by the staple fiber bundle, the latter must be brought up to the thread after leaving the clamping line. The further the groove is spaced from the clamping line section engaging the staple fiber structure, the greater the distance to be covered for the staple fiber structure and ultimately the risk that it will tear off. According to the present invention, this distance can therefore be selected as a function of the length of the staple fiber to be processed. It would be conceivable to vary the axial position of the groove for this purpose by axially displacing the corresponding pinch roller in the ring spinning machine. As an alternative or 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 passed through the at least one groove elude the nipping line and thus also the nipping engagement between the nipping rollers, these can be delivered over or under the fiber structure in any way, i.e. any higher or lower delivery speed have when passing through the clamping device. Since, according to a preferred embodiment, a complete occupation of the at least one thread over the length is desired by the staple fiber structure, in such an embodiment the thread can be supplied below the staple fiber structure. Since the fiber structure emerges from the clamping device at a higher delivery speed, it can wrap itself around the at least one thread and ultimately cover it completely. For example, the thread can have a 5%, 10%, 15% or even 20% have a lower delivery speed than the fiber structure, i.e. by 5%, 10%, 15% or even 20%.

Ein weiterer Aspekt der vorliegenden Erfindung betrifft ein Verfahren zur Herstellung eines Core-Garns mit folgenden Schritten:

  • Bereitstellen eines Faserverbands aus Stapelfasern;
  • Bereitstellen zumindest eines dem Faserverband zuzuführenden Fadens;
  • Verstrecken des Faserverbands in einem Streckwerk;
  • Hindurchführen des das Streckwerk verlassenden Faserverbands und des zumindest einen Fadens durch eine Klemmeinrichtung mit in einer Klemmlinie einander kontaktierenden Klemmrollen;
  • Verdrehen des die Klemmeinrichtung verlassenden Faserverbands und des zumindest einen die Klemmeinrichtung verlassenden Fadens zu einem Core-Garn;
wobei der zumindest eine Faden beim Durchlaufen der Klemmeinrichtung von einer an der Umfangsfläche zumindest einer der Klemmrollen umlaufenden und die Klemmlinie unterbrechenden Nut aufgenommen und an der Klemmlinie vorbeiführt wird, ohne dass dieser von den einander kontaktierenden Klemmrollen klemmend in Eingriff genommen wird.Another aspect of the present invention relates to a method for producing a core yarn with the following steps:
  • Providing a fiber strand made of staple fibers;
  • Providing at least one thread to be fed to the fiber structure;
  • Drawing the fiber composite in a drawing system;
  • Passing the fiber strand leaving the drafting system and the at least one thread through a clamping device with pinch rollers contacting one another in a pinch line;
  • Twisting the fiber strand leaving the clamping device and the at least one thread leaving the clamping device to form a core yarn;
wherein the at least one thread when passing through the clamping device is received by a groove running around the circumferential surface of at least one of the clamping rollers and interrupting the clamping line and is guided past the clamping line without being clamped into engagement by the contacting clamping rollers.

An dieser Stelle soll ausdrücklich hervorgehoben werden, dass das erfindungsgemäße Verfahren sämtliche voranstehend und im Zusammenhang mit der erfindungsgemäßen Ringspinnmaschine beschriebenen Merkmale in sinngemäßer Weise einzeln sowie in jedweder sinnvollen Kombination umfassen kann.At this point, it should be expressly emphasized that the method according to the invention can include all of the features described above and in connection with the ring spinning machine according to the invention in an analogous manner, individually and in any meaningful combination.

Ein weiterer Aspekt der vorliegenden Erfindung betrifft ein Core-Garn, welches mittels einer wie voranstehend beschrieben Ringspinnmaschine und/oder mittels eines wie voranstehend beschriebenen Verfahrens hergestellt wurde. Der erfindungsgemäße Core-Garn kann sich gegenüber bisher bekannten Core-Garnen dadurch auszeichnen, dass der zumindest eine Faden über seine Länge hinweg gänzlich vom Faserverband belegt ist und somit nicht an die Oberfläche des fertigen Core-Garns tritt. Insbesondere kann die erfindungsgemäße Ringspinnmaschine und/oder das erfindungsgemäße Verfahren dazu ausgestaltet sein, ein wie voranstehend beschriebenes Core-Garn herzustellen, dessen Feinheit weniger als 1300 dtex aufweist, im Speziellen weniger als 1000 dtex, weiter bevorzugt weniger als 580 dtex. Das erfindungsgemäße Core-Garn kann etwa bei der Herstellung von Textilien, insbesondere Keidungsstücken oder Bezugsstoffen für beispielsweise Polstermöbel oder Fahrzeug- oder Flugzeugeinrichtungen Verwendung finden.Another aspect of the present invention relates to a core yarn which was produced by means of a ring spinning machine as described above and / or by means of a method as described above. The core yarn according to the invention can be distinguished from previously known core yarns in that the at least one thread is completely covered by the fiber structure over its length and therefore does not come to the surface of the finished core yarn. In particular, the ring spinning machine according to the invention and / or the The method according to the invention can be designed to produce a core yarn as described above, the fineness of which is less than 1300 dtex, in particular less than 1000 dtex, more preferably less than 580 dtex. The core yarn according to the invention can be used, for example, in the production of textiles, in particular garments or cover fabrics for, for example, upholstered furniture or vehicle or aircraft equipment.

Eine bevorzugte Ausführungsform der vorliegenden Erfindung wird im Folgenden unter Bezugnahme auf die beschriebenen Figuren näher erläutert. Die vorliegende Erfindung kann die hierin bestehenden Merkmale einzeln sowie in jedweder sinnvollen Kombination umfassen. 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.
A preferred embodiment of the present invention is explained in more detail below with reference to the figures described. The present invention can comprise the features existing herein individually and in any meaningful combination. Show it:
Figure 1
Illustration 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 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 referred to as roving or roving, and a thread 4, provided in the present case as elastic or inelastic or rigid continuous filament, are drawn off from material templates 1 or 3 and spun to form a core yarn 11 become. The fiber structure 2 withdrawn from the material template 1 passes through an initially unmarked pair of infeed 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. Subsequently, the fiber structure 2 is fed to an outlet roller pair of the drafting system 5, which is referred to below as the clamping device 6. The clamping roller 8 made of a metal material and designed as a drive roller contacts the clamping roller 9, which is pretensioned opposite it and is made of a rubber material and 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 from the material template 3 by means of a drive device (not shown), guided over an undesignated 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 moved by means of a groove (see FIG Figures 2 and 3 ) is guided past the clamping line 7 and can therefore pass through the clamping device with an underdelivery in relation 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 handed over to the thread 4 is wrapped around the thread 4 by the twist distribution device 10 and the fiber structure 2 as well as a twist is imposed on the thread 4 before they are wound up as a completely twisted core thread 11 on the thread head (not shown).

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 FIG. 6 shows a detailed view of the clamping device 6 in FIG Figure 1 shown ring spinning machine along the axes of rotation R of the pinch rollers 8, 9. It can be seen that the thread 4 withdrawn from the material template 3 is initially guided over an unmarked deflection roller and, when detached from its peripheral surface, is inserted into a groove 13 which is inserted into the Circumferential surface 12 of the clamping roller 9 is incorporated and this rotates 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 consequently 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 plane AA from FIG Figure 2 . It can be seen that the fiber structure 2 and the thread 4 are guided parallel and perpendicular to the axes of rotation R of the pinch rollers 8, 9 between the pinch rollers 8, 9. The fiber structure 2 is clamped by the clamping rollers 8 and 9 along the section 15 of the clamping line 7. The thread 4 can die Pass the clamping line 7 unhindered and unaffected by the rotation of the clamping rollers 8, 9 by inserting itself into the groove 13 which is spaced apart from the section 15 along the axis of rotation R of the clamping roller 9. A clogging of the groove 13 by staple fibers detaching from the fiber structure 2 is effectively avoided by the spacing of the groove 13 around 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 itself 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 supplied to a certain extent in relation to the fiber structure 2, that is to say it 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, by placing the thread guide 14 directly adjoining the clamping line 7 in a substantially same axial position as the groove 13 (substantially "below" the groove 13), the thread 4 becomes the main point of application for the rotation distribution and the Fiber structure 2 thus inevitably wraps around thread 4. By positioning the groove 13 near the section 15 clamping the fiber structure 2, it is possible for the fiber structure 2 to be placed around the thread 4 without tearing, in that staple fibers detach from one another in the longitudinal direction. Even before the fiber structure 2, together with the thread 4, passes through the thread guide 14, the finished core yarn 11 with all of its components is already present, as it is ultimately wound onto a yarn cop. The twisting of the fiber strand 2 together with the thread 4 caused by the rotation distribution device 10 and already beginning in the area of the clamping line 7, however, continues even after the thread guide 14 has passed through.

Claims (11)

Ringspinnmaschine zur Herstellung eines Core-Garns (11), mit: - einer ersten Materialvorlage (1) für einen Faserverband (2) aus Stapelfasern; - zumindest einer weiteren Materialvorlage (3) für zumindest einen dem Faserverband (2) zuzuführenden Faden (4), insbesondere Endlosfilament; - einem Streckwerk (5) zum Verstrecken des Faserverbands (2); - einer Klemmeinrichtung (6) mit in einer Klemmlinie (7) einander kontaktierenden Klemmrollen (8, 9), wobei die Klemmeinrichtung (6) von dem das Streckwerk (5) verlassenden Faserverband (2) und dem zumindest einen Faden (4) durchlaufen wird; - einer Drehungserteilungseinrichtung (10), welche den die Klemmeinrichtung (6) verlassenden Faserverband (2) und den zumindest einen die Klemmeinrichtung (6) verlassenden Faden (4) zu einem Core-Garn (11) verdreht; gekennzeichnet durch zumindest eine an der Umfangsfläche (12) zumindest einer der Klemmrollen (8, 9) umlaufende und die Klemmlinie (7) unterbrechende Nut (13), welche den zumindest einen Faden (4) beim Durchlaufen der Klemmeinrichtung (6) aufnimmt und an der Klemmlinie (7) vorbeiführt, ohne dass dieser von den einander kontaktierenden Klemmrollen (8, 9) klemmend in Eingriff genommen wird.Ring spinning machine for the production of a core yarn (11), with: - A first material template (1) for a fiber structure (2) made of staple fibers; - At least one further material template (3) for at least one thread (4) to be fed to the fiber structure (2), in particular endless filament; - A drawing device (5) for drawing the fiber structure (2); - A clamping device (6) with clamping rollers (8, 9) contacting each other in a clamping line (7), the clamping device (6) being traversed by the fiber structure (2) leaving the drafting system (5) and the at least one thread (4) ; - a twist dividing device (10) which twists the fiber structure (2) leaving the clamping device (6) and the at least one thread (4) leaving the clamping device (6) to form a core yarn (11); characterized by at least one groove (13) which runs around the circumferential surface (12) of at least one of the clamping rollers (8, 9) and which interrupts the clamping line (7) and which receives and attaches the at least one thread (4) as it passes through the clamping device (6) the clamping line (7) without it being engaged in a clamping manner by the clamping rollers (8, 9) contacting each other. Ringspinnmaschine nach Anspruch 1, wobei sämtliche Bestandteile des fertigen Core-Garns (11) die Klemmeinrichtung (6) durchlaufen und/oder vor dem Durchlaufen eines unmittelbar an die Klemmeinrichtung (6) anschließenden Fadenführers (14) zusammengeführt werden.Ring spinning machine according to claim 1, wherein all components of the finished core yarn (11) pass through the clamping device (6) and / or are brought together before passing through a thread guide (14) directly adjoining the clamping device (6). Ringspinnmaschine nach Anspruch 1 oder 2, wobei der Faserverband (2) und der zumindest eine Faden (4) unmittelbar nach dem Verlassen der Klemmeinrichtung (6) einen Fadenführer (14) durchlaufen, der gegenüber einer Rotationsachse (R) einer der Klemmrollen (8, 9) im Wesentlichen die gleiche axiale Position einnimmt wie eine Nut (13).Ring spinning machine according to claim 1 or 2, wherein the fiber structure (2) and the at least one thread (4) immediately after leaving the Clamping device (6) pass through a thread guide (14) which, with respect to an axis of rotation (R) of one of the clamping rollers (8, 9), essentially assumes the same axial position as a groove (13). Ringspinnmaschine nach einem der Ansprüche 1 bis 3, wobei die Klemmlinie (7) durch zwei gegenüberliegende, an den Umfangsflächen (12, 16) der jeweiligen Klemmrollen (10, 11) umlaufende Nuten (13) unterbrochen ist und/oder die Klemmlinie (7) mehrfach durch zwei oder mehr axial voneinander beabstandete Nuten (13) unterbrochen ist.Ring spinning machine according to one of Claims 1 to 3, the clamping line (7) being interrupted by two opposite grooves (13) running around the circumferential surfaces (12, 16) of the respective clamping rollers (10, 11) and / or the clamping line (7) is repeatedly interrupted by two or more axially spaced grooves (13). Ringspinnmaschine nach einem der Ansprüche 1 bis 4, wobei zumindest eine Nut (13) im Querschnitt einen ebenen oder konkaven Bodenbereich aufweist, dessen axiale Erstreckung entlang der Rotationsachse (R) der Klemmrolle (8, 9) wenigstens den einfachen, insbesondere wenigstens den doppelten Durchmesser eines von der Nut (13) aufgenommenen Fadens (4) beträgt.Ring spinning machine according to one of Claims 1 to 4, at least one groove (13) having a flat or concave base area in cross section, the axial extent of which along the axis of rotation (R) of the pinch roller (8, 9) is at least simple, in particular at least twice the diameter a thread (4) received by the groove (13). Ringspinnmaschine nach Anspruch 1 oder 5, wobei die axiale Erstreckung zumindest einer Nut (13) mit zunehmendem radialen Abstand zur Rotationsachse (R) der jeweiligen Klemmrolle (8, 9) zunimmt.Ring spinning machine according to Claim 1 or 5, the axial extent of at least one groove (13) increasing with increasing radial distance from the axis of rotation (R) of the respective clamping roller (8, 9). Ringspinnmaschine nach einem der Ansprüche 1 bis 6, wobei in axialer Richtung entlang der Rotationsachsen (R) der Klemmrollen (8, 9) die zumindest eine Nut (13) von dem Abschnitt (15) der Klemmlinie (7) beabstandet ist, in welchem der das Streckwerk (6) verlassende Faserverband (2) von den einander kontaktierenden Klemmrollen (8, 9) klemmend in Eingriff genommen wird, insbesondere wobei der Abstand in Abhängigkeit von der Länge der Stapelfasern des Faserverbands (2) festgelegt ist.Ring spinning machine according to one of claims 1 to 6, wherein in the axial direction along the axes of rotation (R) of the pinch rollers (8, 9) the at least one groove (13) is spaced from the section (15) of the pinch line (7) in which the the fiber structure (2) leaving the drafting system (6) is engaged by the clamping rollers (8, 9) in contact with one another, in particular wherein the distance is determined as a function of the length of the staple fibers of the fiber structure (2). Ringspinnmaschine nach einem der Ansprüche 1 bis 7, wobei zumindest ein dem Faserverband (2) zuzuführender und von einer Nut (13) aufgenommener Faden (4) gegenüber dem Faserverband (2) unterliefert wird.Ring spinning machine according to one of Claims 1 to 7, at least one thread (4) to be fed to the fiber structure (2) and received by a groove (13) being supplied below the fiber structure (2). Verfahren zur Herstellung eines Core-Garns (11) mit folgenden Schritten: - Bereitstellen eines Faserverbands (2) aus Stapelfasern; - Bereitstellen zumindest eines dem Faserverband (2) zuzuführenden Fadens (4); - Verstrecken des Faserverbands (2) in einem Streckwerk (5); - Hindurchführen des das Streckwerk (5) verlassenden Faserverbands (2) und des zumindest einen Fadens (4) durch eine Klemmeinrichtung (6) mit in einer Klemmlinie (7) einander kontaktierenden Klemmrollen (8, 9); - Verdrehen des die Klemmeinrichtung (6) verlassenden Faserverbands (2) und des zumindest einen die Klemmeinrichtung (6) verlassenden Fadens (4) zu einem Core-Garn (11); dadurch gekennzeichnet, dass der zumindest eine Faden (4) beim Durchlaufen der Klemmeinrichtung (6) von einer an der Umfangsfläche (12) zumindest einer der Klemmrollen (8, 9) umlaufenden und die Klemmlinie (7) unterbrechenden Nut (13) aufgenommen und an der Klemmlinie (7) vorbeiführt wird, ohne dass dieser von den einander kontaktierenden Klemmrollen (8, 9) klemmend in Eingriff genommen wird.Method for producing a core yarn (11) with the following steps: - Provision of a fiber assembly (2) made of staple fibers; - Providing at least one thread (4) to be fed to the fiber structure (2); - Drawing the fiber composite (2) in a drawing device (5); - Passing the fiber strand (2) leaving the drafting system (5) and the at least one thread (4) through a clamping device (6) with pinch rollers (8, 9) contacting one another in a pinch line (7); Twisting the fiber strand (2) leaving the clamping device (6) and the at least one thread (4) leaving the clamping device (6) to form a core yarn (11); characterized in that the at least one thread (4) when passing through the clamping device (6) is received and attached to a groove (13) which runs around the circumferential surface (12) of at least one of the clamping rollers (8, 9) and breaks the clamping line (7) the clamping line (7) is guided past without it being engaged in a clamping manner by the clamping rollers (8, 9) contacting each other. Core-Garn, hergestellt mit einer Ringspinnmaschine nach einem der Ansprüche 1 bis 8 oder nach dem Verfahren nach Anspruch 9, wobei der zumindest eine Faden (4) über seine Länge hinweg gänzlich vom Faserverband (2) belegt ist, insbesondere wobei der Core-Garn (11) eine Feinheit von weniger als 1300 dtex, im Speziellen von weniger als 1000 dtex, weiter bevorzugt von weniger als 580 dtex aufweist.Core yarn, produced with a ring spinning machine according to one of claims 1 to 8 or according to the method according to claim 9, wherein the at least one thread (4) is completely covered over its length by the fiber structure (2), in particular the core yarn (11) has a fineness of less than 1300 dtex, in particular of less than 1000 dtex, more preferably of less than 580 dtex. Textilie, insbesondere Kleidungsstück oder Bezugsstoff, umfassend ein Core-Garn nach Anspruch 10.Textile, in particular item of clothing or upholstery fabric, comprising a core yarn according to Claim 10.
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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PT3842578T (en) 2024-01-19
DE102019135719A1 (en) 2021-06-24
DE102019135719B4 (en) 2023-11-30
DK3842578T3 (en) 2024-02-19
EP4273310A2 (en) 2023-11-08
EP4273310A3 (en) 2024-01-10

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