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EP0206956B1 - Spinning device for manufacturing coated yarns - Google Patents

Spinning device for manufacturing coated yarns Download PDF

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Publication number
EP0206956B1
EP0206956B1 EP86420157A EP86420157A EP0206956B1 EP 0206956 B1 EP0206956 B1 EP 0206956B1 EP 86420157 A EP86420157 A EP 86420157A EP 86420157 A EP86420157 A EP 86420157A EP 0206956 B1 EP0206956 B1 EP 0206956B1
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EP
European Patent Office
Prior art keywords
fibers
core
drawing system
outlet
twist
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.)
Expired - Lifetime
Application number
EP86420157A
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German (de)
French (fr)
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EP0206956A2 (en
EP0206956A3 (en
Inventor
Henri Berger
Michel Clement
Marcel Schoumacher
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Devtex
Original Assignee
Devtex
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Publication date
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Publication of EP0206956A3 publication Critical patent/EP0206956A3/en
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Publication of EP0206956B1 publication Critical patent/EP0206956B1/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/11—Spinning by false-twisting
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H13/00—Other common constructional features, details or accessories
    • D01H13/04—Guides for slivers, rovings, or yarns; Smoothing dies
    • 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

Definitions

  • the present invention relates to an improvement in spinning techniques making it possible to produce fiber yarns and more particularly fiber yarns having a structure such that they comprise a central core made up of staple fibers, themselves optionally comprising a core of a continuous filament, this core being covered with an external sheath also made up of discontinuous fibers, these fibers possibly being of the same nature or of a different nature from the fibers forming the core.
  • the invention therefore relates to a device allowing the implementation of the aforementioned method, this device being characterized in that the fibers intended to form the core are, between the outlet of the drawing system and the guide surface where said core is associated with the covering fibers, also subjected to the action of a second condensing element also being in the form of a rotary guide and which is associated with a movable roller blocking the communicated rise in torsion by the false twist pin.
  • a condenser element will be used which, if necessary, can be presented in a similar manner to French patent 2,520,389 (corresponding to US-A-4,487,397 in the name of the Applicant), this element in the form of a rotary guide whose surface is V-shaped.
  • this element in the form of a rotary guide whose surface is V-shaped.
  • it will however be in the form of a cylinder pierced in its middle part over its entire periphery of orifices connected to a source suction.
  • the two condensing elements used in the device according to the invention namely that allowing the supply of fibers intended to form the core and that on which the covering fibers are deposited around the core thus formed can be placed either parallel to the stretching system, or, according to a preferred embodiment orthogonally. In both cases, the fibers coming from the drawing system and which are intended to form the core will envelop the condensing element on a part of its periphery before the arrival at the torsion blocking roller.
  • the torsion blocking roller can be made of metal, ceramic, rubber and will preferably be mounted to means making it possible to adjust its pressure against the surface of the condenser; the roller can, of course, be disengaged when a machine stops or during an intervention.
  • the installation according to the invention essentially comprises a conventional stretching system (1) for each working position, designated by the general reference (1 ) and which, in the present case, is a conventional sleeve system, well known to technicians and which will therefore not be described in detail.
  • a conventional stretching system for each working position, designated by the general reference (1 ) and which, in the present case, is a conventional sleeve system, well known to technicians and which will therefore not be described in detail.
  • any other equivalent stretching system could be used.
  • a guide surface (4) constituted by a rotating disc, also designated by the term "condenser” and which is in the form of a rotary, hollow cylinder pierced over its entire periphery with orifices (5).
  • the rotary cylinder is subjected to the action of a suction source.
  • a friction false-twist spindle (6) is arranged downstream of the rotary condenser guide (4).
  • a call system is provided before the winding means (not shown) which are constituted, for example, by a winding system with tangential drive not imparting additional twist to the spun yarn formed. Of course, any other winding system which possibly makes it possible to communicate an additional twist could be used.
  • the drawing system (1) common to the fibers intended to form the core and the covering of the core yarn to be produced consists of two systems with sleeve (1a, 1b), operating in parallel, a device commonly used in spinning fibers.
  • the system (1a) makes it possible to deliver the fibers intended to form the cover while the other system (1b) delivers the fibers intended to form the core.
  • the fibers coming from the system (1a) are delivered on the guide surface (or condenser) (4), rotary, and come to wrap this surface, while the other fibers coming from the system (1b), and which are intended to form the core, are brought tangentially to this surface in the extension of the false twist spindle (6).
  • the twist communicated by the spindle (6) goes up along the formed wire and makes it possible to trap the fibers coming from the drawing system (1 a).
  • the fibers from the system (1b) intended to form the core are, between the outlet of the drawing system (1b) and the guide surface (4) where the formed core (7) is associated with the covering fibers (8), subjected to the action of a second condenser element designated by the general reference (9) and which is also in the form of a rotary guide (10) associated with a movable roller ( 11) blocking the rise in torsion communicated by the false torsion pin (6).
  • FIGS. 1, 2 and 3 Such an additional condenser element is illustrated in FIGS. 1, 2 and 3, the embodiment illustrated by FIG. 3 in which this condenser element is disposed orthogonally with respect to the outlet of the drawing train being however preferable.
  • such a device has very many advantages in that it makes it possible to obtain wires having greater regularity and in which the core thread can be much finer. Furthermore, it is possible, as is clear from the embodiment illustrated in FIGS. 7 to 9, to produce a very compact assembly in which the covering condenser element (element 4), and the condenser element d 'soul (9), the false twist pin (6) are grouped in a very small volume. Finally, in this arrangement, it is possible to provide separating elements (12,13,14) between the two condensers preventing any loss of fibers. Finally, in such devices, it is easily possible to incorporate an additional core wire, for example a continuous filament inside the fibrous core, this additional element being brought between the condenser element (9) and the pressure roller (10).
  • an additional core wire for example a continuous filament inside the fibrous core, this additional element being brought between the condenser element (9) and the pressure roller (10).

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

Description

La présente invention concerne un perfectionnement apporté aux techniques de filature permettant de réaliser des filés de fibres et plus particulièrement des filés de fibres ayant une structure telle qu'ils comportent une âme centrale constitutée de fibres discontinues, comportant elles-mêmes éventuellement une âme à base d'un filament continu, cette âme étant recouverte d'une gaine externe également constituée de fibres discontinues, ces fibres pouvant être de même nature ou de nature différente des fibres formant l'âme.The present invention relates to an improvement in spinning techniques making it possible to produce fiber yarns and more particularly fiber yarns having a structure such that they comprise a central core made up of staple fibers, themselves optionally comprising a core of a continuous filament, this core being covered with an external sheath also made up of discontinuous fibers, these fibers possibly being of the same nature or of a different nature from the fibers forming the core.

Elle a trait plus particulièrement à un dispositif perfectionné permettant la mise en oeuvre du procédé faisant l'objet de la demande de brevet français n° 84 03 083 (publié sous le n° 2 560 230) et qui correspond à l'US-A-4 584 830.It relates more particularly to an improved device for implementing the process forming the subject of French patent application No. 84 03 083 (published under No. 2560230) and which corresponds to US-A -4,584,830.

Les brevets précités concernent eux-mêmes un perfectionnnement apporté aux brevets français déposés par le Demandeur sous les n° 82/01 382 et 82/15 830 (brevets publiés respectivement sous les n° 2 520 391 et 2 533 236 et qui correspondent à l'US-A-4 489 540) qui décrivent une technique dans laquelle on soumet les fibres destinées à former l'âme interne à une fausse torsion et on projette sur ce filé, en amont de la broche de fausse torsion, des fibres élémentaires, la projection desdites fibres élémentaires sur l'âme dans la zone de remontée de torsion étant réalisée au moyen d'une surface de guidage mobile sur laquelle lesdites fibres sont délivrées tangentiellement et qui tend à exercer une force de traction sur l'extrémité libre desdites fibres, l'âme étant déplacée tangentiellement par rapport à la surface de guidage précitée selon une direction concourante avec la direction d'amenée des fibres.The aforementioned patents relate themselves a perfectionnnement given to French patents filed by the Applicant under the No. 82/01 and 82/15 382 830 (respectively patent published under No. 2,520,391 and 2,533,236 and corresponding to 'US-A-4 489 540) which describe a technique in which the fibers intended to form the internal core are subjected to a false twist and we project onto this yarn, upstream of the false twist spindle, elementary fibers, the projection of said elementary fibers onto the core in the area of torsional rise being produced by means of a movable guide surface on which said fibers are delivered tangentially and which tends to exert a tensile force on the free end of said fibers , the core being moved tangentially relative to the aforementioned guide surface in a direction concurrent with the direction of supply of the fibers.

Selon le perfectionnement apporté par le FR-A-2 560 230 (correspondant à l'US-A-4 584 830), pour obtenir un tel filé à âme, l'ensemble des fibres (âme et couverture) sont soumises à l'action d'un système d'étirage commun, c'est-à-dire soit d'un système d'étirage unique pour la totalité des fibres soit de deux systèmes fonctionnant simultanément en parallèle, et, à la sortie du système d'étirage commun :

  • - une partie des fibres, destinées à former la couverture, sont délivrées progressivement sur une surface de guidage mobile, sur laquelle elles sont maintenues à plat, cette surface tendant à exercer une force de traction sur l'extrémité libre desdites fibres ;
  • - l'autre partie des fibres, destinées à former l'âme, sont maintenues écartées par rapport à ladite surface pour être amenées en contact tangentiel avec celle-ci en aval de la zone de projection de la première partie de fibres sur ladite surface.
According to the improvement brought by FR-A-2 560 230 (corresponding to US-A-4 584 830), in order to obtain such a core spun, all of the fibers (core and covering) are subjected to the action of a common drawing system, that is to say either of a single drawing system for all the fibers or of two systems operating simultaneously in parallel, and, at the outlet of the drawing system common :
  • - A part of the fibers, intended to form the cover, are delivered progressively on a movable guide surface, on which they are held flat, this surface tending to exert a tensile force on the free end of said fibers;
  • - The other part of the fibers, intended to form the core, are kept apart with respect to said surface to be brought into tangential contact with the latter downstream of the projection zone of the first part of fibers on said surface.

L'un des problèmes qui se posent pour la mise en oeuvre d'un tel procédé, qui par ailleurs donne entière satisfaction, réside dans le fait qu'il ne permet que difficilement d'obtenir un fil d'âme fin qui implique de réaliser un étirage important ainsi qu'également qu'il ne permet pas de localiser avec précision le point de blocage de remontée de torsion le long du fil d'âme, ce point variant en fonction de la tension donnée au fil par l'organe de fausse torsion disposé en aval de l'ensemble d'étirage. Par ailleurs, selon ce procédé, il est également relativement délicat d'incorporer une âme continue à l'intérieur de l'âme fibreuse, notamment lorsque l'on souhaite renforcer la résistance du filé résultant.One of the problems which arise for the implementation of such a method, which moreover is entirely satisfactory, lies in the fact that it only makes it difficult to obtain a thin core wire which involves making a significant stretching as well as also that it does not allow to locate with precision the blocking point of torsional rise along the core wire, this point varying according to the tension given to the wire by the false body torsion arranged downstream of the drawing assembly. Furthermore, according to this method, it is also relatively delicate to incorporate a continuous core inside the fibrous core, in particular when it is desired to reinforce the resistance of the resulting yarn.

Or on a trouvé, et c'est ce qui fait l'objet de la présente invention, un dispositif qui permet de résoudre l'ensemble de ces problèmes.Now we have found, and this is what is the subject of the present invention, a device which makes it possible to solve all of these problems.

D'une manière générale, l'invention concerne donc un dispositif permettant la mise en oeuvre du procédé précité, ce dispositif se caractérisant par le fait que les fibres destinées à former l'âme sont, entre la sortie du système d'étirage et la surface de guidage où ladite âme est associée aux fibres de couverture, également soumises à l'action d'un second élément condenseur se présentant également sous la forme d'un guide rotatif et qui est associé à un galet mobile bloquant la remontée de torsion communiquée par la broche de fausse torsion.In general, the invention therefore relates to a device allowing the implementation of the aforementioned method, this device being characterized in that the fibers intended to form the core are, between the outlet of the drawing system and the guide surface where said core is associated with the covering fibers, also subjected to the action of a second condensing element also being in the form of a rotary guide and which is associated with a movable roller blocking the communicated rise in torsion by the false twist pin.

Grâce à un tel dispositif, on a constaté qu'il était possible, non seulement d'augmenter sensiblement le taux d'étirage qu'il était possible de donner aux fibres destinées à constituer l'âme, mais également que l'on obtenait des fils très réguliers, parfaitement identiques sur toutes les positions que comporte l'installation de filature, de tels fils pouvant être parfaitement reproductibles dans le temps.Thanks to such a device, it has been found that it was possible not only to appreciably increase the drawing rate which it was possible to give to the fibers intended to constitute the core, but also that we obtained very regular threads, perfectly identical in all the positions involved in the spinning installation, such threads being able to be perfectly reproducible over time.

Par ailleurs, un tel dispositif favorise l'incorporation d'une âme filamentaire continue à l'intérieur des fibres formant l'âme du filé si cela est souhaité, cette âme pouvant être éventuellement constituée par un fil extensible. Pour la mise en oeuvre de l'invention, on utilisera un élément condenseur qui, éventuellement, peut se présenter de manière similaire au brevet français 2 520 389 (correspondant à l'US-A-4 487 397 au nom du Demandeur), cet élément se présentant sous la forme d'un guide rotatif dont la surface est en forme de V. De préférence, il se présentera cependant sous la forme d'un cylindre percé dans sa partie médiane sur toute sa périphérie d'orifices reliés à une source d'aspiration.Furthermore, such a device promotes the incorporation of a continuous filamentary core inside the fibers forming the core of the yarn if desired, this core possibly being constituted by an extensible yarn. For the implementation of the invention, a condenser element will be used which, if necessary, can be presented in a similar manner to French patent 2,520,389 (corresponding to US-A-4,487,397 in the name of the Applicant), this element in the form of a rotary guide whose surface is V-shaped. Preferably, it will however be in the form of a cylinder pierced in its middle part over its entire periphery of orifices connected to a source suction.

Les deux éléments condenseurs utilisés dans le dispositif conforme à l'invention, à savoir celui permettant l'amenée des fibres destinées à former l'âme et celui sur lequel on effectue le dépôt des fibres de couverture autour de l'âme ainsi formée peuvent être placés soit parallèlement au système d'étirage, soit, selon une forme préférentielle de réalisation orthogonalement. Dans les deux cas, les fibres provenant du système d'étirage et qui sont destinées à former l'âme envelopperont l'élément condenseur sur une partie de sa périphérie avant l'arrivée au galet bloqueur de torsion.The two condensing elements used in the device according to the invention, namely that allowing the supply of fibers intended to form the core and that on which the covering fibers are deposited around the core thus formed can be placed either parallel to the stretching system, or, according to a preferred embodiment orthogonally. In both cases, the fibers coming from the drawing system and which are intended to form the core will envelop the condensing element on a part of its periphery before the arrival at the torsion blocking roller.

Le galet bloqueur de torsion peut être en métal, céramique, caoutchouc et sera monté de préférence à des moyens permettant de régler sa pression contre la surface du condenseur ; le galet peut, bien entendu, être débrayable lors d'un arrêt d'une machine ou lors d'une intervention.The torsion blocking roller can be made of metal, ceramic, rubber and will preferably be mounted to means making it possible to adjust its pressure against the surface of the condenser; the roller can, of course, be disengaged when a machine stops or during an intervention.

L'invention et les avantages qui en découlent seront cependant mieux compris grâce aux exemples de réalisation qui sont donnés ci-après à titre indicatif mais non limitatif et qui sont illustrés par les schémas annexés dans lesquels :

  • - les figures 1 et 2 sont respectivement des vues schématiques en perspective et vues de face de la partie du dispositif conforme à l'invention permettant de réaliser l'âme fibreuse sur laquelle seront apportées des fibres de couverture, ce dispositif condenseur étant, dans cette forme de réalisation, disposé parallèlement au système d'étirage ;
  • - la figure 3 illustre une variante préférentielle conforme à l'invention selon laquelle pour la réalisation de l'âme fibreuse, le dispositif condenseur muni de son presseur bloqueur de torsion est décalé de 90° par rapport au système d'étirage ;
  • - les figures 4 et 5 sont des vues en perspective montrant l'ensemble d'un dispositif conforme à l'invention dans lequel les trains d'étirage sont disposés sensiblement horizontalement, les condenseurs d'âme et de couverture étant disposés orthogonalement à la sortie du système d'étirage ;
  • - la figure 6 est une vue schématique en perspective montrant un dispositif conforme à l'invention dans lequel le système d'étirage est disposé verticalement, les condenseurs d'âme et de couverture étant disposés également orthogonalement par rapport à la sortie dudit système d'étirage et en-dessous de ce dernier ;
  • - les figures 7,8 et 9 sont des vues de détail montrant la réalisation d'un dispositif conforme à l'invention tel qu'illustré à la figure 6, et ce, respectivement selon la direction A (figure 7) et la direction B (la figure 8 montrant la réalisation du condenseur d'âme, la figure 9 montrant l'amenée des fibres de couverture).
The invention and the advantages which result therefrom will however be better understood thanks to the exemplary embodiments which are given below by way of indication but not limitation and which are illustrated by the appended diagrams in which:
  • - Figures 1 and 2 are respectively schematic perspective views and front views of the part of the device according to the invention for making the fibrous core on which will be provided covering fibers, this condenser device being, in this embodiment, arranged parallel to the stretching system;
  • - Figure 3 illustrates a preferred variant according to the invention according to which for the production of the fibrous core, the condenser device provided with its torsion blocking presser is offset by 90 ° relative to the drawing system;
  • - Figures 4 and 5 are perspective views showing the assembly of a device according to the invention in which the drawing trains are arranged substantially horizontally, the core and cover condensers being arranged orthogonally at the outlet the stretching system;
  • - Figure 6 is a schematic perspective view showing a device according to the invention in which the stretching system is arranged vertically, the core and cover condensers being also arranged orthogonally to the outlet of said system stretching and below the latter;
  • - Figures 7,8 and 9 are detail views showing the embodiment of a device according to the invention as illustrated in Figure 6, and this, respectively in direction A (Figure 7) and direction B (Figure 8 showing the embodiment of the core condenser, Figure 9 showing the supply of covering fibers).

Dans la suite de la description pour les différentes variantes illustrées, les mêmes éléments seront désignés par les mêmes références.In the following description for the different variants illustrated, the same elements will be designated by the same references.

Si l'on se reporte aux figures annexées et plus particulièrement aux figures 4 à 9, l'installation conforme à l'invention comporte essentiellement un système d'étirage conventionnel (1) pour chaque position de travail, désigné par la référence générale (1) et qui, dans le cas présent, est un système classique à manchon, bien connu des techniciens et qui ne sera donc pas décrit en détail. Bien entendu, tout autre système d'étirage équivalent pourrait être utilisé.If reference is made to the appended figures and more particularly to figures 4 to 9, the installation according to the invention essentially comprises a conventional stretching system (1) for each working position, designated by the general reference (1 ) and which, in the present case, is a conventional sleeve system, well known to technicians and which will therefore not be described in detail. Of course, any other equivalent stretching system could be used.

En aval de la dernière paire de cylindres étireurs (2,3) du système d'étirage (1) est disposée une surface de guidage (4) constituée par un disque rotatif, désigné également par l'expression "condenseur" et qui se présente sous la forme d'un cylindre rotatif, creux, percé sur toute sa périphérie d'orifices (5). Le cylindre rotatif est soumis à l'action d'une source d'aspiration. Une broche de fausse torsion à friction (6) est disposée en aval du guide condenseur rotatif (4). Un système d'appel est prévu avant les moyens de renvidage (non représenté) qui sont constitués, par exemple, par un système de renvidage à entraînement tangentiel ne communiquant pas de torsion additionnelle au filé formé. Bien entendu, tout autre système de renvidage permettant éventuellement de communiquer une torsion additionnelle pourrait être utilisé.Downstream of the last pair of stretching cylinders (2,3) of the stretching system (1) is disposed a guide surface (4) constituted by a rotating disc, also designated by the term "condenser" and which is in the form of a rotary, hollow cylinder pierced over its entire periphery with orifices (5). The rotary cylinder is subjected to the action of a suction source. A friction false-twist spindle (6) is arranged downstream of the rotary condenser guide (4). A call system is provided before the winding means (not shown) which are constituted, for example, by a winding system with tangential drive not imparting additional twist to the spun yarn formed. Of course, any other winding system which possibly makes it possible to communicate an additional twist could be used.

Conformément aux enseignements du FR-A-2 560 230 (USP 4 584 830), le système d'étirage (1) commun aux fibres destinées à former l'âme et la couverture du filé à âme à réaliser, est constitué de deux systèmes à manchon (1a, 1b), fonctionnant en parallèle, dispositif couramment utilisé dans la filature de fibres. Le système (1 a) permet de délivrer les fibres destinées à former la couverture alors que l'autre système (1b) délivre les fibres destinées à former l'âme. Les fibres provenant du système (1a) sont délivrées sur la surface de guidage (ou condenseur) (4), rotative, et viennent envelopper cette surface, alors que les autres fibres provenant du système (1 b), et qui sont destinées à former l'âme, sont amenées tangentiellement à cette surface dans le prolongement de la broche de fausse torsion (6). La torsion communiquée par la broche (6) remonte le long du fil formé et permet d'emprisonner les fibres provenant du système d'étirage (1 a).In accordance with the teachings of FR-A-2,560,230 (USP 4,584,830), the drawing system (1) common to the fibers intended to form the core and the covering of the core yarn to be produced, consists of two systems with sleeve (1a, 1b), operating in parallel, a device commonly used in spinning fibers. The system (1a) makes it possible to deliver the fibers intended to form the cover while the other system (1b) delivers the fibers intended to form the core. The fibers coming from the system (1a) are delivered on the guide surface (or condenser) (4), rotary, and come to wrap this surface, while the other fibers coming from the system (1b), and which are intended to form the core, are brought tangentially to this surface in the extension of the false twist spindle (6). The twist communicated by the spindle (6) goes up along the formed wire and makes it possible to trap the fibers coming from the drawing system (1 a).

Conformément à la présente invention, les fibres provenant du système (1b) destinées à former l'âme sont, entre la sortie du système d'étirage (1b) et la surface de guidage (4) où l'âme formée (7) est associée aux fibres de couverture (8), soumises à l'action d'un second élément condenseur désigné par la référence générale (9) et qui se présente également sous la forme d'un guide rotatif (10) associé à un galet mobile (11) bloquant la remontée de torsion communiquée par la broche de fausse torsion (6).According to the present invention, the fibers from the system (1b) intended to form the core are, between the outlet of the drawing system (1b) and the guide surface (4) where the formed core (7) is associated with the covering fibers (8), subjected to the action of a second condenser element designated by the general reference (9) and which is also in the form of a rotary guide (10) associated with a movable roller ( 11) blocking the rise in torsion communicated by the false torsion pin (6).

Un tel élément condenseur additionnel est illustré aux figures 1, 2 et 3, la forme de réalisation illustrée par la figure 3 dans laquelle cet élément condenseur est disposé orthogonalement par rapport à la sortie du train d'étirage étant cependant préférable.Such an additional condenser element is illustrated in FIGS. 1, 2 and 3, the embodiment illustrated by FIG. 3 in which this condenser element is disposed orthogonally with respect to the outlet of the drawing train being however preferable.

Par rapport aux enseignements du FR-A-2 560 230 (US-A-4 584 830), un tel dispositif présente de très nombreux avantages par le fait qu'il permet d'obtenir des fils ayant une plus grande régularité et dans lesquels le fil d'âme peut être beaucoup plus fin. Par ailleurs, il est possible, ainsi que cela ressort clairement de l'exemple de réalisation illustré par les figures7 à 9, de réaliser un ensemble très compact dans lequel l'élément condenseur de couverture (élément 4), et l'élément condenseur d'âme (9), la broche de fausse torsion (6) sont regroupés dans un très faible volume. Enfin, dans cette disposition, il est possible de prévoir des éléments séparateurs (12,13,14) entre les deux condenseurs évitant toute perte de fibres. Enfin, dans de tels dispositifs, il est facilement possible d'incorporer un fil d'âme additionnel, par exemple un filament continu à l'intérieur de l'âme fibreuse, cet élément additionnel étant amené entre l'élément condenseur (9) et le rouleau presseur (10).Compared to the teachings of FR-A-2,560,230 (US-A-4,584,830), such a device has very many advantages in that it makes it possible to obtain wires having greater regularity and in which the core thread can be much finer. Furthermore, it is possible, as is clear from the embodiment illustrated in FIGS. 7 to 9, to produce a very compact assembly in which the covering condenser element (element 4), and the condenser element d 'soul (9), the false twist pin (6) are grouped in a very small volume. Finally, in this arrangement, it is possible to provide separating elements (12,13,14) between the two condensers preventing any loss of fibers. Finally, in such devices, it is easily possible to incorporate an additional core wire, for example a continuous filament inside the fibrous core, this additional element being brought between the condenser element (9) and the pressure roller (10).

Claims (5)

1. Spinning installation for making fiber spun yarns comprising a central core constituted by discontinuous fibers covered with an external sheath likewise constituted by discontinuous fibers, of the type in which the fibers for forming the internal core are subjected to a momentary false twist operation by means of a spindle (6) and elementary fibers (8) are projected onto the spun yam (7) thus formed upstream of the false twist spindle (6), the projection of said elementary fibers (8) onto the core in the zone where the twist extends back being achieved by means of a mobile guiding surface (4) on which said fibers are delivered tangentially and which tends to exert a pulling force on their free end, the core (7) being displaced tangentially with respect to the said guiding surface in a direction which is concurrent with the direction in which the fibers are brought, the whole fiber assembly (core and covering part) being subjected to the action of a common drawing system (1) at the outlet of which:
- part of the fibers for forming the cover is delivered progressively onto the said mobile guiding surface (4) on which they are maintained flat, this surface tending to exert a pulling force on the free end of said fibers;
- the other part of the fibers, intended to form the core, is maintained spaced apart from said surface (4) in order to be brought into tangential contact therewith downstream of the zone of projection of the first part of fibers onto said surface,
characterized in that the fibers for forming the core (7) are, between the outlet of the drawing system (1) and the guiding surface (4) where said core is associated with the covering fibers, also subjected to the action of a second condenser element (9) also in the form of a rotating guide (10) and which is associated with a mobile roller (11) blocking the extension back of twist communicated by the false twist spindle (6).
2. Installation according to the claim 1, characterized in that the rotary guide (10) of the second condenser element (9) is in the form of a cylinder pierced in its median part, over the whole of its periphery, with orifices connected to a source of suction.
3. Installation according to the claim 2, characterized in that the two condenser elements (4, 9) are disposed at right angles to the outlet of the drawing system (1).
4. Installation according to the claim 3, characterized in that the fibers coming from the drawing system (1b), which are to form the core envelop the condenser element (10) over part of its periphery before the arrival of the twist blocking roller (11).
5. Installation according to the claim 4, characterized in that the drawing system (1) is disposed vertically, the condenser elements (9, 4) being disposed horizontally below the outlet of the drawing system (1).
EP86420157A 1985-06-25 1986-06-19 Spinning device for manufacturing coated yarns Expired - Lifetime EP0206956B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8509973A FR2583783A1 (en) 1985-06-25 1985-06-25 DEVICE FOR DRAWING, CONDENSING AND TRANSPORTING A WICK OF FIBERS DURING A SPINNING OPERATION.
FR8509973 1985-06-25

Publications (3)

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EP0206956A2 EP0206956A2 (en) 1986-12-30
EP0206956A3 EP0206956A3 (en) 1987-12-02
EP0206956B1 true EP0206956B1 (en) 1990-01-24

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EP86420157A Expired - Lifetime EP0206956B1 (en) 1985-06-25 1986-06-19 Spinning device for manufacturing coated yarns

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EP (1) EP0206956B1 (en)
JP (1) JPS61296129A (en)
DE (1) DE3668476D1 (en)
FR (1) FR2583783A1 (en)

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US4823545A (en) * 1987-08-31 1989-04-25 Maschinenfabrik Rieter Ag Method of and apparatus for false-twist spinning
FR2650309A1 (en) * 1989-07-27 1991-02-01 Devtex Spinning machine making it possible to produce spun fibres exhibiting fancy effects along their length, and novel types of spun fibres thus obtained
FR2667618A1 (en) * 1990-10-04 1992-04-10 Devtex Method for obtaining spun fibres and device for implementing it
US5383331A (en) * 1992-06-11 1995-01-24 Proctor; Charles W. Composite comprising staple fiber and filament yarn
US5568719A (en) * 1992-06-11 1996-10-29 Prospin Industries, Inc. Composite yarn including a staple fiber covering a filament yarn component and confining the filament yarn component to a second thickness that is less than a first thickness of the filament in a relaxed state and a process for producing the same
US5802826A (en) * 1993-08-06 1998-09-08 The United States Of America As Represented By The Secretary Of Agriculture Production of core/wrap yarns by airjet and friction spinning in tandem
US5619848A (en) * 1995-08-09 1997-04-15 Prospin Industries, Inc. Method and apparatus for automatically removing an imperfection from spun filament yarn and staple fibers
DE19815050B4 (en) * 1998-04-03 2005-09-22 Saurer Gmbh & Co. Kg Compression drafting system for a spinning machine
DE19815053B4 (en) * 1998-04-03 2006-01-05 Saurer Gmbh & Co. Kg A method of making a false twist and spinning machine therefor
DE19815051A1 (en) * 1998-04-03 1999-10-14 Zinser Textilmaschinen Gmbh Spinning machine with a drafting device having a suction rotor
DE10318817A1 (en) * 2003-04-17 2004-11-04 Wilhelm Stahlecker Gmbh Spinning device with a fiber composite compression device

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FR2461040A1 (en) * 1979-07-09 1981-01-30 Inst Textile De France METHOD AND DEVICE FOR OBTAINING A THREAD HAVING ITS LENGTH OF ALTERNATIVELY REVERSE SENSE ZONES
FR2465805A1 (en) * 1979-09-20 1981-03-27 Asa Sa MACHINE FOR OBTAINING AUTOTORDUS WIRES
US4489540A (en) * 1982-01-26 1984-12-25 Asa S.A. Process and device for obtaining a spun yarn of fibres comprising an internal core and novel types of spun yarns thus made
FR2520389A1 (en) * 1982-01-26 1983-07-29 Asa Sa DEVICE FOR STRETCHING, CONDENSING AND TRANSPORTING A FIBER BIT DURING A SPINNING OPERATION
FR2545108B1 (en) * 1983-04-29 1986-04-04 Juillard Yves SPINNING PROCESS AND DEVICE FOR CARRYING OUT SAID METHOD
FR2560230B1 (en) * 1984-02-24 1987-12-04 Asa Sa PROCESS FOR OBTAINING A FIBER FILE

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FR2583783A1 (en) 1986-12-26
DE3668476D1 (en) 1990-03-01
EP0206956A2 (en) 1986-12-30
JPS61296129A (en) 1986-12-26
US4757680A (en) 1988-07-19
EP0206956A3 (en) 1987-12-02

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