EP2004534B1 - Method of manufacturing a winding with separate threads - Google Patents

Abstract

Method for the manufacture of wound packages comprising a plurality of assembled strands, characterized in that one separates the strands coming from a spinneret into at least 2 blankets, in which each one of the blankets is wound on the same wound package with the help of a traveler, said wound package supported by one of the spindles, one proceeds to start the movement of the circular pirn battery in such a way as to switch one of the spindles from its spooling phase to its rest phase, during this transition phase between the spindles, one proceeds to a separation of the rovings traveling from the spinneret to the surface of said wound package with the help of a separation device, one brings the cursor closer to the surface of the wound package and the latter then intercepts the trajectory of each one of the separated rovings in such a way as to enclose each one of the rovings within said traveler, and one positions the separation device in its second position.

Description

The present invention relates to a method of manufacturing windings comprising a plurality of son wound in parallel unwindable in the form of a single assembled wick, these son being for technical use, in particular based on glass or thermoplastic polymer. According to another aspect of the invention, it also relates to the device for implementing this method.

In the manufacture of reinforcing glass yarns, the manufacture of an assembled wick is the result of a complex industrial process which consists of obtaining threads from molten glass threads flowing through the die orifices. These fillets are drawn as continuous filaments, and then these filaments are combined into base yarns, which yarns are then generally collected in the form of cakes intended for internal use because they are difficult to transport. The cakes are then positioned on creels that feed a winder on which is formed the cylindrical ball of roving (wick) assembled. The products obtained are not free of defects such as undulations or loops from differences in the tension of the basic threads.

The manufacture of multifilament wick in a single operation and directly under die (direct roving) leads to the realization of cylindrical coils of a single large wire whose strands (in the sense of continuous filaments) are well equitendus.

Within the meaning of the invention, the coils are also in the form of straight-sided windings or in the form of cylindrical windings, and are generally referred to as "roving" or "ball" depending on their destination final.

The form of coil is made using winders, which as their name suggests, are responsible for winding at very high speed (about 10 to 50 meters per second) the glass threads that were previously sized.

These winders ensure the drawing and winding of these filaments and the operating parameters of these winders condition with those of the die the dimensional characteristics of the yarn, in particular the title expressed in tex (the tex being the weight in grams of 1000 meters fiber or yarn).

Conventionally a winder is placed roughly under a die, from which descends one or more strands of son gathered at a point or several points, these son are then wound live on a rotating spindle by means of one or more sliders at a groove for axially distributing the threads gathered along one or more reels by a reciprocating movement synchronized with the rotation of the spindle, this slider or these sliders are part of a subset that the is called encroisure, which is mounted on a movable support allowing its permanent repositioning during the winding, parallel to the spindle axis to allow it to maintain a certain distance between the slider or sliders and the outer cylindrical surface of the coil or coils whose diameter changes throughout its or their construction.

A first family of winders is said to restart mankind, that is to say that an operator is responsible for manually restarting the windings, and it is possible to wind on the same winding several son, up to eight, even sixteen threads (each of the threads consisting of a strand of filaments).

A second winder family is called automatic restart. In this case, the winder is more complex than those described above, and it further comprises a barrel supporting a plurality of pins (generally at least two in number), each of the rotatable spindles, being adapted to stretch and wind at least one stack successively on each of the pins, one of the pins being active while the other is at rest to allow the unloading of the stack just made, a automatism coupled to the various actuators of the winder being responsible for performing the passage of at least one strand of filaments from one spindle to the other during the rotation of the barrel.

With this type of technology, it is possible to obtain several stacks on one and the same spindle, each of the stacks consisting of only one strand of coiled thread having its own characteristics.

On the other hand, it is not possible to obtain, as from the manual restart winders, on the same stack, a winding of several strands of optimal quality, which consists in its ability to be easily unrolled, without the presence of loops. , parasitic nodes, with limitation of friction.

The published patent application EP 0 211 748 discloses a method and a winding device for making windings from a plurality of separate continuous wires, particularly glass wires. According to what is described in the document, an installation according to the invention comprises a die having a quantity of a molten thermoplastic material, a rotating spindle for drawing the threads of material coming from the orifices of the die as well as the winding of the son. It also comprises an assembly and guide device and a crimping device comprising a wire guide. This wire guide comprises an aperture facing the pin communicating with an internal guiding zone provided at its periphery with at least two notches.

The present invention is specifically concerned with winders whose recovery is automated that do not have the disadvantages mentioned above, and which allow the winding on the same coil, the winding separated according to an optimal quality, of at least two strands of characteristics ( in particular number of wires per strand, choice of material forming the wire ...) different or identical

To do this, it is necessary that the accuracy of the deposit resulting from an axial distribution of the son wound live on the rotating spindle is optimal.

• on sépare les fils venant d'une filière en au moins 2 nappes, chacune des nappes formant une mèche de fils est enroulée sur un même enroulement à l'aide d'un curseur permettant de déposer simultanément en surface dudit enroulement les fils ainsi séparés, ledit enroulement étant supporté par l'une des broches,
• on procède à mise en mouvement du barillet de manière à faire passer l'une des broches de sa phase de bobinage à sa position de reps, l'autre broche passant alors de sa position repos à sa position de bobinage, durant cette mise en mouvement le curseur est écarté de la surface de l'enroulement
• durant cette étape de transition entre les broches, on procède à une séparation des mèches cheminant depuis la filière jusqu'à la surface dudit enroulement à l'aide d'un dispositif de séparation, ce dernier pouvant occuper une première position dans laquelle il permet d'une part d'écarter l'une de l'autre les mèches et d'autre part de les maintenir en position écartée, et une seconde position dans laquelle il n'interfère pas avec le trajet des mèches,
• on rapproche le curseur de la surface de l'enroulement, le mouvement alternatif intercepte alors le trajet de chacune des mèches séparées de manière à emprisonner chacune des mèches au sein dudit curseur et permettre le dépôt en surface de l'enroulement,
• on positionne le dispositif de séparation dans sa deuxième position.

To this end, the method of manufacturing windings comprising a plurality of son assembled by means of a winder comprising a barrel provided with at least a first and a second spindle, each of the first and second spindles being successively either rest, that is to say during an unloading phase or being mobile in rotation, that is to say during a winding phase of a winding is characterized in that

• the wires coming from a die are separated into at least two plies, each of the plies forming a strand of threads is wound on one and the same winding with the aid of a slider making it possible to deposit the separated threads simultaneously on the surface of said winding, said winding being supported by one of the pins,
• the barrel is set in motion so as to pass one of the spindles from its winding phase to its reps position, the other spindle then passing from its rest position to its winding position, during this setting in motion the cursor is removed from the surface of the winding
• during this step of transition between the pins, it proceeds to a separation of the wicks running from the die to the surface of said winding using a separation device, the latter can occupy a first position in which it allows to on the one hand to separate the wicks from each other and on the other hand to maintain them in a remote position, and a second position in which it does not interfere with the path of the wicks,
• the cursor is brought closer to the surface of the winding, the reciprocating movement then intercepts the path of each of the separate strands so as to trap each of the strands within said slider and allow the winding of the surface to be deposited,
• the separation device is positioned in its second position.

Thanks to these arrangements and in particular to the presence of the separating device, the locks are constantly preserved and identified during the entire transition phase, namely during the passage from one winding spindle to the other, thus making it possible to wind on a spool. same winding at least two wicks separately.

• on provoque l'accrochage de la mèche au sein du curseur par un mouvement de translation du curseur par rapport à ladite mèche, celui-ci venant dans un premier temps guider la mèche grâce à une zone de guidage puis dans un deuxième la verrouiller au sein d'une zone de verrouillage,
• on provoque l'accrochage de la mèche au sein du curseur par un mouvement d'indexation en position du curseur par rapport à celle de la mèche,
• le dispositif de séparation se positionne au voisinage du trajet des mèches de manière à d'une part, intercepter leur trajet et d'autre part à repousser au moins une première mèche d'au moins une seconde mèche de par et d'autre d'un plan médian,

In preferred embodiments of the invention, one or more of the following may also be used:

• it causes the attachment of the wick within the cursor by a translational movement of the cursor with respect to said wick, the latter coming in a first time guide the wick through a guide zone and in a second lock it within a lock zone,
• it causes the attachment of the wick within the cursor by an indexing movement in position of the cursor relative to that of the wick,
• the separation device is positioned in the vicinity of the path of the wicks so as to firstly intercept their path and secondly to repel at least a first wick of at least a second wick on each side of a median plane,

According to another aspect of the invention, it relates to a winder allowing the implementation of the previously described method, the winder essentially comprising a frame, this frame comprising a barrel movable in rotation with respect to the frame, said barrel being from minus two pins each adapted to support at least one winding, each of the pins being rotatable about a first axis substantially perpendicular to the diameter of the winding so as to simultaneously stretch and wind at least two bits in the form of a winding of separated locks, and a device at least provided with a slider for depositing on the surface of the winding wicks separated from one another, characterized in that it further comprises a device for separation can occupy a first position in which it allows one hand to separate from each other wicks running from a die to the curse ur and secondly to maintain them in a remote position, and a second position in which it does not interfere with the path of the wicks.

• le dispositif de séparation comporte au moins une palette pourvue au niveau de l'un de ses côtés d'au moins deux arêtes, ces arêtes étant sécantes de manière à définir entre elles un plan de séparation du passage d'au moins de deux mèches, chacune des mèches étant dirigée grâce à ces arêtes vers des zones d'immobilisation positionnées respectivement au niveau des extrémités libres desdites arêtes,
• le dispositif de séparation est monté mobile en rotation par rapport au châssis, selon un axe sensiblement parallèle à l'axe de rotation des broches,
• le curseur est monté dans le dispositif d'encroisure et comporte un guide fil d'au moins deux gorges, chacune des gorges étant adaptée pour recevoir une mèche,
• le curseur comporte un guide fil globalement de forme trapézoïdale dont deux des côtés forment des parois en courbe adaptées pour guider une mèche jusqu'à une paroi en saillie par rapport à l'un des deux autres côtés du guide fil, cette paroi en saillie permettant de contraindre le déplacement de la mèche dans une gorge située au pied de ladite paroi en saillie, ladite gorge étant adaptée pour immobiliser ladite mèche,
• le curseur comporte un guide fil globalement de forme trapézoïdale, l'un des côtés est pourvu d'une pluralité de gorges, chacune des gorges étant adaptée pour immobiliser une mèche,
• Les gorges comportent une partie borgne à flan parallèle et une partie s'évasant vers l'extérieur dudit guide fil,

In preferred embodiments of the invention, one or more of the following may also be used:

• the separating device comprises at least one pallet provided at one of its sides with at least two edges, these edges being intersecting so as to define between them a separation plane of the passage of at least two wicks, each of the strands being directed through these edges to immobilization zones positioned respectively at the free ends of said ridges,
• the separating device is mounted rotatably with respect to the frame, along an axis substantially parallel to the axis of rotation of the pins,
• the slider is mounted in the crease device and comprises a wire guide of at least two grooves, each of the grooves being adapted to receive a wick,
• the slider comprises a generally trapezoidal wire guide whose two sides form curved walls adapted to guide a wick to a wall projecting from one of the other two sides of the wire guide, this projecting wall allowing to constrain the displacement of the wick in a groove located at the foot of said projecting wall, said groove being adapted to immobilize said wick,
• the slider comprises a generally trapezoidal wire guide, one of the sides is provided with a plurality of grooves, each of the grooves being adapted to immobilize a wick,
• The grooves comprise a parallel blank blind portion and a portion flaring outwardly of said guide wire,

A winding obtained by the method described above, comprises a plurality of turns, preferably at least two, each of the turns consisting of at least one wick consisting of a material and being separated from one of them by a step p.

• les matériaux formant chacune des spires sont différents,
• les matériaux formant chacune des spires sont identiques,
• chacune des mèches comporte un nombre identique de filaments,
• chacune des mèches comporte un nombre différent de filaments,
• l'une au moins des mèches est à base de filaments de fils cornêlés de verre et de polymère thermoplastique, par exemple une polyoléfine un polyamide, un polyester, un polyuréthane thermoplastique
• l'une au moins des mèches est à base de filaments de verre,
• il comporte au moins 2 spires séparées, chacune des spires étant respectivement formée d'une mèche de 400 à 4000 filaments de verre, préférentiellement de 800 à 1600 filaments de verre et d'une mèche de 200 à 4000 filaments de polypropylène, préférentiellement de 600 à 1600 filaments de polypropylène.

In addition, one or more of the following provisions may be used:

• the materials forming each of the turns are different,
• the materials forming each of the turns are identical,
• each of the locks has an identical number of filaments,
• each of the locks has a different number of filaments,
• at least one of the locks is based on filaments of glass and thermoplastic polymer, for example a polyolefin a polyamide, a polyester, a thermoplastic polyurethane
• at least one of the locks is based on glass filaments,
• it comprises at least two separate turns, each of the turns being respectively formed of a wick of 400 to 4000 glass filaments, preferably 800 to 1600 glass filaments and a wick of 200 to 4000 filaments of polypropylene, preferably 600 1600 filaments of polypropylene.

Other features and advantages of invention will become apparent from the following description of one of its embodiments, given by way of non-limiting example, with reference to the accompanying drawings.

• La figure 1 est une vue schématique de face d'un bobinoir selon l'invention,
• La figure 2 est une vue de face du dispositif de séparation destiné à utilisation en 2 mèches,
• La figure 3 est une vue d'un curseur utilisable en combinaison avec le dispositif de séparation de la figure 2,

On the drawings:

• The figure 1 is a schematic front view of a winder according to the invention,
• The figure 2 is a front view of the separation device intended for use in 2 locks,
• The figure 3 is a view of a slider usable in combination with the separation device of the figure 2 ,

According to a preferred embodiment of a winder 1 according to the invention illustrated in figure 1 , it comprises a metal frame obtained by a technique of mechanically welded metal elements previously machined or available as standard commercially. This frame essentially comprises a substantially rectangular base resting on legs suitably placed so as to correspond to the jig or the spacing of the forks of a pallet truck or a similar handling device to facilitate the implementation of this winder in a fiberizing position.

On this base is assembled a closed structure partially covered, which is intended to receive all the components necessary for the operation of the winder 1. As such, and in a nonlimiting manner, this closed cabinet-shaped structure is provided with the control and control devices necessary for the various regulations of the various components which will be described later in the present description, of networks, hydraulic, electrical, compressed air, and other necessary fluids the operation of said organs.

On the closed structure cooperates a cylinder 2 which projects laterally. This barrel 2 is rotatably mounted about an axis of rotation and is held within one of the walls of the closed structure by means of a plurality of guide members (ball crown, ball slide for example).

Indeed, this barrel 2 constitutes a support assembly of pins 3, 4. On the figure 1 , we note that the barrel 2 has two pins 3, 4, in diametrically opposed positions [if there is only one pin, it is not possible to make the automatic transfer]. Alternatively, not shown in the figures, one could design a barrel with at least three, four pins, or more, depending on the space available and the capabilities of the die positioned upstream). Within the winder 1, the barrel 2 makes it possible to bring a spindle 3 previously unloaded and provided with at least one blank sleeve (within the meaning of the invention, a sleeve is a support made of plastic, cardboard or other material which is intended for receiving the spool of thread or the winding of threads) in the winding position and another spindle 4 having its full cuffs in the unloading position by rotations of 180 °.

Each of the pins 3, 4 integral with the barrel 2 is a rotating assembly adapted to stretch and wind the wire 5 on a sleeve previously introduced on the spindle. This winding is performed along a first axis of rotation substantially parallel to the axis of rotation of the barrel relative to the structure of the frame.

On the figure 1 , there appears another element which is essential for the realization of a coil. This is the device for positioning and guiding the wire on pin 6. In this example, it is a movable cursor in a groove, the cursor moving linearly along a second axis substantially parallel to the first axis; the assembly being mounted within an assembly that can move closer to or away from the outer peripheral surface of the coil during the winding thereof. This set is commonly called "crease device".

Classically, and we can refer to the figure 3 , a crimping device 6 comprises a member shaped as a movable slider 7 linearly within a groove, this movable slider 7 makes it possible to position at least one wire 5 on the spindle 3 or 4 in rotation, the movement printed by the wire guide 7 consisting essentially of a movement of oscillations or beats only over a length of the coil.

To obtain a complete winding, the slider 7 is movably mounted in a movement back and forth in translation on a shaft integral with the frame and parallel to the axis of the spindle, this second translational movement thus making it possible to cover the length of the coil.

In a preferred embodiment, the cursor 7 represented in figure 3 allows the simultaneous removal on the surface of the same and single winding of at least two wicks, each of the wicks consisting of a plurality of son 5, these two wicks being separated by a pitch p in the form, in this case , two turns almost joined. This type of winding with separate turns, however, guarantees optimal unwinding, without the risk of knots and parasitic loops.

This slider 7 is of generally trapezoidal shape whose base 8 is substantially parallel to the axis of rotation of the winding.

At its sides, the slider 7 has a curved or inclined surface delimiting in fact guide surfaces 9, 10 which, when moving the slider in a direction substantially parallel to the axis of rotation of the spindle, intercept the trajectory of a first bit in a direction of displacement and a second bit in the other direction of alternative displacement, these bits being derived from a die 11 (visible in FIG. figure 1 ) placed above the winder 1, these wicks thanks to these inclined guide surfaces thus being directed towards a projecting wall 12 with respect to the base 8 of the slider 7.

This projecting wall constrains each of the locks in a retention zone 13, 14 and immobilization shaped in a groove (on the figure 3 , it appears 2 throats, one for each wick).

Within this groove 13, 14, the wick is free to slide with the least possible friction, moreover, the material constituting the guide surfaces and the grooves is chosen so as to locally have a high hardness and a coefficient of friction. the smallest possible so as not to destroy and damage the wick of filaments and in particular at its sizing.

The slider 7, substantially trapezoidal, has inclined walls at its sides 9, 10 and at the inlet walls of each of the grooves 13, 14 so as to promote the guide of the wick to the bottom of the groove which is parallel axis. As a variant, the inventors have envisaged interception of the trajectory of the locks not by an alternating movement of the slider 7 and have preferred to privilege an indexing movement in position of the slider 7 with respect to the path of the locks, this indexing movement in position being facilitated by the different servocontrols both in position and in speed with which a winder of this type is provided, all the movements of the spindle (s) 3, 4, the barrel 2, the crimping device 6 and its slider 7, the separation device 15 which will be mentioned below, is controlled by a programmable controller responsible for controlling and controlling at all times this assembly for optimum winding of a winding.

Whatever the embodiment of the slider 7, the operation of the slider 7 is combined with that of the separation device 15, shown in FIG. figures 1 and 2 .

This separating device 15 is rotatably mounted relative to the chassis (hinge point marked A) and travels between a rest position in which the path of the locks is not deflected by the position of the separating device 15 and a so-called working position during which the separating device 15 intercepts the path of the strands so as on the one hand to separate or separate them from each other and secondly to keep them separate during the transition phase.

The phase of transition is defined as the phase during which the wicks which have just been wound on a winding until a full spool is obtained from the winding and stretching on a first spindle must pass automatically (c that is to say without human intervention stimulus) on another spindle (due to the rotation of the barrel), this second spindle to allow winding the drawing strands of filaments on the surface of at least a second winding.

During this transition phase, it is essential that the wicks initially wound on the winding of a first spindle in a separate manner (if there are two strands of threads 5 of identical or different material, this corresponds to a spool two turns) are not mixed or lost during rotation of the barrel and that the two wicks can again be wound and stretched in separate form on a second winding supported by the second spindle.

• Lors de la phase de transition, le dispositif de séparation 15 passe de sa position de repos à sa position active, les mèches de filaments ou fils 5 issues d'une filière 11 située au dessus du bobinoir 1 vienent au contact d'une palette 16 solidaire du dispositif de séparation 15.

To do this, the decomposition of the movements is as follows:

• During the transition phase, the separation device 15 moves from its rest position to its active position, the strands of filaments or son 5 coming from a die 11 located above the winder 1 come into contact with a pallet 16 secured to the separation device 15.

As can be seen on the figure 2 , the pallet 16 globally forms a rhombus, one of the axes of symmetry is positioned in such a way that it separates, in a median plane, the path of the strands, each strand passing on either side of this median plane.

Given the inclined faces 17, 18 of the pallet 16, each of the wicks which is in contact with this face is directed towards the free ends of the rhombus towards a retention zone 19, 20 or adapted groove to receive with the least possible friction each of the locks, the locks can not escape from these areas during the entire transition phase.

When each of the locks is held in its retention zone 19, 20, the creasing device deviates from the surface of the winding or the full spool, releasing the slider 7 of its wick considered, the barrel 2 performs a rotational movement so as to arrange the second pin 3 or 4 ready to wind and stretch a second winding in conditions similar to the previous winding.

When the second spindle 3 or 4 is ready to wind, the crimping device 6 approaches the surface of the winding, the wicks (always held in their respective retention area 19, 20 of the pallet 16) lick the surface of the winding (they remain strained by the position of the first spindle) the separating device 15 is positioned in its rest position, releasing the locks from their respective retention zone 19, 20.

• En effet, il est possible de bobiner sur un même axe de broche et sur au moins un même enroulement (voire notamment deux juxtaposés) plusieurs mèches (au moins deux dans les exemples), chacune des mèches pouvant être constituée d'un nombre n et n' de filaments identiques ou différents, à partir d'un même matériau ou de matériaux différents, ces matériaux étant choisis parmi ceux à usage technique, comme par exemple ceux à base de verre, de thermoplastiques (polypropylène notamment).

The locks then come to intercept the reciprocating movement of the slider 7 as explained above. When each of the grooves 13, 14 of the slider 7 is engaged with its respective bit, the winding of the winding can be initialized and the coils obtained from a winder operating according to the modalities of the method described above are distinguished from the prior art significantly:

• Indeed, it is possible to wind on the same spindle axis and on at least one same winding (or in particular two juxtaposed) several wicks (at least two in the examples), each of the wicks may consist of a number n and n 'of identical or different filaments, from the same material or different materials, these materials being selected from those for technical use, such as for example those based on glass, thermoplastics (polypropylene in particular).

These windings have the ability to unwind, although each of the turns are separated by a pitch p, without risk of knots or parasitic loops.

By way of example, an example of winding based on "Twintex" ®, which is a registered trademark of a glass and thermoplastic yarn, is given below.
This winding comprises at least 2 separate turns, each of the turns being respectively formed of a wick of 400 to 4000 glass filaments, preferably 800 to 1600 glass filaments and a wick of 200 to 4000 filaments of polypropylene, preferably of 600 to 1600 filaments of polypropylene.

• Verre et thermoplastique : pour réaliser des étoffes combinées résistantes à la déchirure ou au poinçonnement
• Comêlé et verre : pour des applications de plaques thermoplastiques renforcées balistiques à délaminage contrôlé, par des tissus ou des tissus unidirectionnels thermoformés
• Cornêlé et thermoplastique pour des mats à faibles taux de verre.

Indeed, it may be advantageous to obtain on a winding at least 2 separate turns depending on the intended applications

• Glass and thermoplastic: to make combined fabrics resistant to tearing or punching
• Comet and glass: for applications of ballistic reinforced thermoplastic plates with controlled delamination, by thermoformed fabrics or unidirectional fabrics
• Pelleted and thermoplastic for mats with low levels of glass.

For these applications, there were no solutions in the prior art that discloses windings with separate turns of identical nature and possibly different title.

Claims (10)

1. A method of fabricating windings comprising a plurality of filaments (5) assembled using a winder (1) comprising a drum (2) provided with at least first and second spindles (3, 4), each of the first and second spindles (3, 4) being successively either at rest, i.e. during a stage of unloading, or else moving in rotation, i.e. during a stage of winding a winding, the method being characterized by the following steps:

   · separating the filaments (5) coming from a spinneret (11) in at least two sheets, winding each of the sheets forming a roving of filaments (5) on a given winding with the help of a crossing device (6) provided with a traveler (7) suitable for depositing the filaments (5) as separated in this way simultaneously onto the surface of said winding, said winding being supported by one of the spindles (3, 4);

   · setting the drum (2) into movement so as to cause one of the spindles (3, 4) to go from its winding stage to its rest position and the other spindle to go from its rest position to its winding position, with the traveler (7) being spaced apart from the surface of the winding during this movement;

   · during this transition step between the spindles (3, 4), separating rovings coming from the spinneret (11) to the surface of said winding with the help of a separator device (15), the operator device being capable of occupying a first position in which it both enables the rovings to be separated from each other and also enables them to be held in a spaced-apart position, and a second position in which it does not interfere with the paths of the rovings;

   · moving the traveler (7) to the winding surface;

   · positioning the separator device (15) in its second position; and

   · the traveler (7) then intercepting the paths of each of the separated rovings so as to cause each of said rovings to be held captive within said traveler (7) and enable it to be deposited on the surface of the winding.
2. A method according to claim 1, characterized in that the roving is caused to catch within the traveler (7) by moving the traveler (7) in translation relative to said roving, the traveler initially guiding the roving by means of a guide zone (9, 10) and then locking it within a locking zone (13, 14).
3. A method according to claim 1, characterized in that the roving is caused to catch within the traveler (7) by a movement of indexing the position of the filament guide relative to the position of the roving.
4. A method according to any preceding claim, characterized in that the separator device (15) takes up a position in the vicinity of the paths of the rovings so that firstly it intercepts their paths, and secondly it pushes back at least the first roving from at least a second roving on either side of a midplane.
5. A winder (1) for implementing a method according to any preceding claim, the winder essentially comprising a frame, the frame including a drum (2) movable in rotation relative to the frame, said drum (2) having at least two spindles (3,4), each adapted to support at least one winding, each spindle (3, 4) being movable in rotation about a first axis substantially perpendicular to the winding diameter so as to stretch and wind simultaneously at least two rovings in the form of a separate-roving winding, and at least one crossing device (6) provided with a traveler (7) enabling the rovings separated from each other to be deposited on the surface of the winding, the winder being characterized in that it further includes a separator device (15) capable of occupying a first position in which it enables the rovings coming from a spinneret (11) to a traveler (7) firstly to be separated from each other and secondly to be maintained in a separated position, and a second position in which it does not interfere with the paths of the rovings.
6. A winder according to claim 5, characterized in that the separator device (15) includes at least one blade (16) provided at one of its sides with at least two edges (17, 18), these edges intersecting in such a manner as to define between them a separation plane for passing at least one of the two rovings, each of the rovings being directed by these edges (17, 18) towards holding zones (19, 20) positioned respectively at the free ends of said edges.
7. A winder according to claim 5 or claim 6, characterized in that the separator device (15) is mounted to move in rotation relative to the frame, about an axis that is substantially parallel to the axis of rotation of the spindles.
8. A winder according to any one of claims 5 to 7, characterized in that the traveler (7) is mounted in the crossing device (6) and includes at least two grooves (13, 14), each of the grooves being adapted to receive one roving.
9. A winder according to any one of claims 5 to 8, characterized in that the traveler (7) includes a filament guide of generally trapezoidal shape, having two sides that form curved walls (9, 10) suitable for guiding a roving towards a wall (12) projecting relative to one of the other two sides of the filament guide, said projecting wall (12) enabling the movement of the roving to be constrained in a groove (13, 14) situated at the foot of said projecting wall (12), said groove being adapted to prevent said roving from moving.
10. A winder according to claim 8 or claim 9, characterized in that the grooves (13, 14) include respective blind portions with parallel flanks and portions that flare outwards from said filament guide.

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