EP0515762A1 - Process for centrifugal spinning - Google Patents

Process for centrifugal spinning Download PDF

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Publication number
EP0515762A1
EP0515762A1 EP91500048A EP91500048A EP0515762A1 EP 0515762 A1 EP0515762 A1 EP 0515762A1 EP 91500048 A EP91500048 A EP 91500048A EP 91500048 A EP91500048 A EP 91500048A EP 0515762 A1 EP0515762 A1 EP 0515762A1
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European Patent Office
Prior art keywords
wire
bundle
spinning
pot
branch
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EP91500048A
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German (de)
French (fr)
Inventor
Carlos Pujol-Isern
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Individual
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Individual
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Priority to EP91500048A priority Critical patent/EP0515762A1/en
Priority to JP13104892A priority patent/JPH05163621A/en
Publication of EP0515762A1 publication Critical patent/EP0515762A1/en
Withdrawn legal-status Critical Current

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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
    • D01H1/08—Spinning or twisting machines in which the product is wound-up continuously cup, pot or disc type, in which annular masses of yarn are formed by centrifugal action

Definitions

  • the present invention relates to a centrifugal spinning process in which the bundle of fibers produced from a drawing train is deposited against the lateral face of a pot driven in rotation, the bundle is cut upstream of this pot as soon as 'a certain length of wire is accumulated against this wall, one directs one of the cut ends, forming the end of this length of wire thus accumulated towards a storage reel and one directs the other cut end against the lateral face of a second pot driven in rotation, the beam is cut again as soon as a certain length of wire is accumulated against the side wall of this second pot and this cycle is repeated continuously.
  • Centrifugal spinning is a spinning process the idea of which was proposed by a certain de Feranti in 1904 already.
  • the advantage of this spinning mode lies essentially in the fact that it avoids the friction problems of the continuous ring-cursor system and can therefore reach much higher speeds with excellent quality of the thread.
  • this device comprises a fiber bundle supply conduit which has two branches, each of which leads to a pot.
  • Each branch includes a beam cutting device and pneumatic means are intended to direct a cut end into the other branch while other pneumatic means send the other cut end forming the end. of the length of wire formed in the first pot, in a discharge conduit which leads to a winding device.
  • the wire With this spinning mode, the wire is twisted in two phases: when it enters the pot and when it leaves it. It follows that the wire in the pot has about 50-60% of the final twist.
  • the torsion induced during the first phase being lower than that induced with the ring-cursor process for example, the torsion rises less along the yarn and the lack of cohesion between the fibers does not allow general not to ensure the continuity of the process, which partly explains why this process has no industrial application, despite the fact that it makes it possible to obtain a high quality yarn at a high production speed due to the fact that 'it eliminates the friction problems of the ring-cursor system.
  • Pneumatic air jet spinning is another spinning mode that has been talked about for a while as a very promising system, particularly in terms of productivity.
  • the bundle of fibers formed at the exit of the stretching train is taken in a first vortex helical directed in one direction then in a second vortex holico ⁇ dal directed in opposite direction.
  • the object of the present invention is to remedy the drawbacks of the above-mentioned spinning methods.
  • the subject of this invention is a centrifugal spinning process according to claim 1, as well as a spinning loom, according to claim 2.
  • This process makes it possible to induce a pretortion on the bundle of fibers leaving the stretching train, sufficient to bring it into the spinning pots where it receives the real twist.
  • This process also makes it possible to pass the bundle of fibers from one pot to another, despite the cutting of the bundle which must occur to allow this change of pot and thus eliminates the connection between the bundle of fibers leaving the drawing train and the means that communicate part of its twist to it. Thanks to this process, there is therefore no break in the spinning despite the break in the bundle and the pretortion communicated to it is sufficient to bring the released end of the bundle into the other pot, where the centrifugal spinning process takes place. continues.
  • this pretorsion is also essential to add to the twist that goes up the wire from the pot and communicate it sufficient cohesion to allow it to pass from the outlet of the drawing train to the centrifugal spinning pots without breaking.
  • the thread is constantly twisted in the same direction so that the twist affects all of the fibers making up the thread.
  • Figure 1 is an elevational view partially in section of this spinning device.
  • FIG. 2 is a sectional view along line II-II of a detail in FIG. 1.
  • FIG. 3 is an enlarged partial view of FIG. 1.
  • FIG. 4 is a partial enlarged view of a detail of FIG. 3.
  • Figure 5 is a perspective view of a spinning device similar to that of Figure 1 with formation of a continuous wire and winding of this wire.
  • FIG. 1 The portion of spinning loom illustrated in FIG. 1 represents only a centrifugal spinning unit of a spinning loom. Only the parts necessary for understanding the invention have been illustrated without regard to the drive mechanisms which are well known to those skilled in the art.
  • the device which is part of a spinning loom comprises a pair of rollers 1, 2 for feeding the bundle of fibers.
  • One of these rollers 2 is integral with a drive shaft 3 driven in rotation by the motor mechanism of the spinning loom.
  • the rollers 1 and 2 constitute the last pair of rollers of a drawing train (not shown).
  • This feed member comprises a duct 5 whose inlet is conical for receiving the bundle of fibers leaving the stretching train and which is divided into two branches 6 and 7.
  • nozzles 8 open tangentially along the duct 5. These nozzles 8 communicate with an annular supply channel 9 which itself communicates with the outside via an opening 10 intended to connect the nozzles 8 to a source of pressurized air (not shown). As illustrated in FIG. 1, these nozzles 8 are inclined relative to the axis of the conduit 5. Taking into account this inclination and the fact that these nozzles open tangentially in the conduit 5, they induce in this conduit a helical flow directing towards branches 6 and 7.
  • a drawer 11 is slidably mounted in a housing 12 of the supply member.
  • This drawer has two passages 13 and 14 which are arranged so as to connect the conduit 5 respectively with the conduits 6 and 7, in the two limit positions that the drawer can occupy in the housing 12.
  • Two openings 15 and 16 are formed respectively at the two ends of the housing 12 for connecting it by two separate supply lines 17 respectively 18 selectively to a source of pressurized air (not shown) via a control valve 19, so that the drawer 11 can be moved between its two limit positions to connect the duct 5 either with the duct 6 or with the duct 7.
  • the space separating the entries from the passages 13 and 14 of the drawer 11 is slightly less than the diameters of the duct 5 so that by moving the slide 11 between its two positions, the pressurized air can still flow in the conduits 6 and 7 and is not discharged against the current in the conduit 5, this which would interrupt the spinning process.
  • the edges of the inlet openings of the passages 13 and 14 move relative to the outlet opening of the duct 5 which allows the fiber bundle to be sheared .
  • the face of the drawer 11 located between the outlets of the passages 13 and 14 provides a clearance 11a with the wall of the housing 12 to avoid pinching the end of the bundle of fibers which has been cut.
  • each branch 6 and 7 leads to a centrifugal spinning pot 20 respectively 21 passing through an extraction member 22 respectively 23.
  • These pots are driven in rotation by means (not shown).
  • the tubular parts 24 respectively 25 leading to the extraction members 22, 23 in the respective pots 20 and 21 is surrounded by a telescopic tube 26 respectively 27.
  • These telescopic tubes are integral with a support 28 driven in an alternating vertical movement as indicated by the double arrows F, by a drive mechanism of the machine (not shown).
  • the lower ends of these telescopic tubes 26, 27 are therefore displaced along the longitudinal axes of the centrifugal spinning pots 20, respectively 21, in order to distribute the wire exiting at the base of this telescopic tube, along the internal lateral faces. centrifugal spinning pots 20 and 21.
  • Each telescopic tube 26, 27 is surrounded by a sleeve 29 respectively 30 which aims to provide at its end a flared profile 31 for example, as illustrated in FIG. 4, serving to guide the bundle of fibers before it leaves the end of this sleeve 29 to deposit on the internal face of the pot 20.
  • This flared profile 31 is connected to the external lateral face of the sleeve 29 by a convex profile 32.
  • This shape of the lower end of the sleeve 29 has has been studied in order to prevent the bundle of fibers emerging therefrom from wrapping around this sleeve, in particular during the descent of the telescopic tube 26, when the bundle of fibers makes an acute angle with the external face of the sleeve 29 .
  • Two evacuation conduits 33, 34 exit from the extraction members 22 respectively 23 and terminate in a reel for storing the wire 41 produced in the pots 20 and 21.
  • Nozzles 35 and 36 selectively connected to the source of pressurized air (not shown) by the supply conduits 18 respectively 17 open into the conduits 6 respectively 7 by forming an oblique angle directing the air jet in the evacuation conduits 33 respectively 34.
  • Two shutters 37 and 38 are slidably mounted in the extraction members 22 respectively 23 parallel to the conduits 6 respectively 7, just at the junction of the extraction conduits 33 respectively 34.
  • shutters 37 and 38 are each integral with a pneumatic actuating device 39 respectively 40 comprising a cylinder and a double-acting piston, connected in inverse relation to one another to the supply conduits 17 and 18, so that one of the obturates urs closes its exhaust duct while the other opens it and vice versa, as illustrated in Figure 1.
  • a pneumatic actuating device 39 respectively 40 comprising a cylinder and a double-acting piston, connected in inverse relation to one another to the supply conduits 17 and 18, so that one of the obturates urs closes its exhaust duct while the other opens it and vice versa, as illustrated in Figure 1.
  • Figure 5 shows a variant according to which it is possible to produce a continuous yarn with the centrifugal spinning process object of the invention.
  • first wire reserve device 43 of known type which makes it possible to feed and extract wire at variable speeds.
  • a device for reattaching wires 42 which is preferably a reattaching device such as that described in EP-A1-0 249 578 belonging to the applicant.
  • This reattachment device is followed by a second known wire supply device 43a.
  • These known wire reserve devices are, for example, of the type described in US Pat. No.
  • Such a feeding device makes it possible to receive wire at variable speed and, thanks to its reserve, to supply it simultaneously at another speed.
  • a reel 44 associated with a winding shaft 45 driven by the drive mechanism of the spinning loom continuously receives the thread leaving the feed device with reserve of thread 43a.
  • the winding speed corresponds to the spinning speed.
  • the drawn bundle of fibers leaving the drawing train 1,2 enters the duct 5 of the supply member 4 and is subjected to the helical force induced by the air flows leaving the nozzles 8.
  • the pressurized air carrying with it the wire is directed into that of the branch lines which is open, that is to say that which is connected to the conduit 5 by a passage 13 or 14.
  • the branch 6 which is open.
  • the wire which has undergone a pretortion in the conduit 5 then passes through the conduit 6, passes through the extraction member 22 and terminates in the centrifugal spinning pot 20 at the outlet of the telescopic tube 26 animated by a vertical movement in an alternating direction to distribute the wire against the internal side wall of this spinning pot.
  • the valve 19 switches the source of pressurized air from the supply duct 17 to the supply duct 18
  • the drawer 11 is pushed from left to right in the housing 12, thereby cutting the wire and simultaneously communicating the conduit 5 with the branch 7 through the passage 14.
  • the air which can no longer flow into the branch line 6 then goes to the spinning pot 21 through branch line 7, the ejection member 23, the conduit 25 and the telescopic tube 27.
  • pressurized air is sent into the evacuation channel 33 through the nozzle 35 to direct the released end of the wire into the evacuation duct 33 and to draw the wire out of the spinning pot. 20. Since the latter continues to rotate during the wire extraction operation, an additional axial twist is induced on the wire, so that the twist occurs both when entering and exiting the spinning pot centrifugal.
  • the spinning of the bundle of fibers continuously leaving the stretching train continues in the centrifugal spinning pot 21.
  • the new end linked to the thread leaving the stretching train does not receive plus the twist that goes up from the centrifugal spinning pot.
  • the pretortion which is thus induced on the fiber bundle as it leaves the drawing train, gives it sufficient cohesion to allow the beam to be brought into the second centrifugal spinning pot 21.
  • FIG. 5 illustrates a solution making it possible to transform this spinning process by nature discontinuous into a continuous process starting directly from a ribbon R of fibers carded, as in an "open-end” spinning process, but with a wire quality equal to or even superior to that of a ring-cursor system.
  • the wire is brought from a pot 20 respectively 21 to the first wire reserve device 43.
  • Another length of wire is stored on the second wire reserve device 43a which continuously feeds the spool 44.
  • the front end of the length of wire being wound on the wire reserve device 43 is brought directly into the reattachment device 42. This already retains the rear end of the wire stored on the wire reserve device 43a.
  • the two ends are connected as described in EP-A1-0 249 578 while the wire is wound on the first wire reserve device 43 and extracted from the second wire reserve device 43a to feed the coil 44 continuously.
  • the winding speed of the reel 44 corresponds exactly to the speed of production of the wire.
  • the second wire reserve device must have a higher storage speed than the production speed to take account of the downtime required for the reattachment.
  • the first wire reserve device performs storage during the reattachment but it can only be emptied once the reattachment is finished and therefore at the same speed as the wire is stored on the second wire reserve device 43a. It is therefore also necessary that its storage speed be higher than the speed of production of the yarn, since it must be loaded and unloaded during the filling time of a centrifugal spinning pot.

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

Abstract

The thread leaving a drawing train (1, 2) is guided into a centrifugal spinning can (20). Once a particular length of thread has accumulated against the wall of this can, the thread is cut by a cutting member (11, 13, 14) and the end, freed in this way, of the length of thread which is in the can (20) is driven by a nozzle (35), supplied with compressed air and arranged in an extraction member (22), into a discharge conduit (33) terminating at a storage bobbin (41). As regards the other end which is no longer connected to the twist induced in the can (20), a pretwist is imparted to it at the same time as a pull by a helical airflow generated in the feed member (4) by compressed air admitted through an orifice (10) and issuing into a channel (5) for the entry of the thread through nozzles (8) inclined relative to the axis of this channel and opening into it tangentially. The cutting member (11, 13, 14) blocks the passage of air in the branch (6), and its passage (14) guides the air towards the can (21) by way of the branch (7), thereby driving the thread with it. This cycle is subsequently repeated indefinitely. <IMAGE>

Description

La présente invention se rapporte à un procédé de filage centrifuge selon lequel on dépose le faisceau de fibres produit à partir d'un train étireur contre la face latérale d'un pot entraîné en rotation, on coupe le faisceau en amont de ce pot dès qu'une certaine longueur de fil est accumulée contre cette paroi, on dirige l'une des extrémités coupées, formant la fin de cette longueur de fil ainsi accumulée vers une bobine de stockage et on dirige l'autre extrémité coupée contre la face latérale d'un second pot entraîné en rotation, on coupe à nouveau le faisceau des qu'une certaine longueur de fil est accumulée contre la paroi latérale de ce second pot et on répète ce cycle en continu.The present invention relates to a centrifugal spinning process in which the bundle of fibers produced from a drawing train is deposited against the lateral face of a pot driven in rotation, the bundle is cut upstream of this pot as soon as 'a certain length of wire is accumulated against this wall, one directs one of the cut ends, forming the end of this length of wire thus accumulated towards a storage reel and one directs the other cut end against the lateral face of a second pot driven in rotation, the beam is cut again as soon as a certain length of wire is accumulated against the side wall of this second pot and this cycle is repeated continuously.

La filature centrifuge est un procédé de filage dont l'idée a été proposée par un certain de Feranti en 1904 déjà. L'intérêt de ce mode de filage réside essentiellement dans le fait qu'il permet d'éviter les problèmes de frottement du système continu à anneau-curseur et peut de ce fait atteindre des vitesses beaucoup plus élevées avec une qualité excellente du fil.Centrifugal spinning is a spinning process the idea of which was proposed by a certain de Feranti in 1904 already. The advantage of this spinning mode lies essentially in the fact that it avoids the friction problems of the continuous ring-cursor system and can therefore reach much higher speeds with excellent quality of the thread.

L'inconvénient de ce procédé vient du fait qu'il n'est pas possible de travailler de façon continue étant donné que le pot doit être vidé périodiquement. Pour éviter une interruption du procédé pendant l'évacuation du fil produit dans ce pot, et une diminution considérable du rendement, on a proposé d'avoir deux pots par unité de filage, de façon à remplir le second pot pendant que l'on vide le premier pot et inversement.The disadvantage of this process comes from the fact that it is not possible to work continuously since the pot must be emptied periodically. To avoid an interruption of the process during the evacuation of the wire produced in this pot, and a considerable reduction in the yield, it has been proposed to have two pots per spinning unit, so as to fill the second pot while we empty the first pot and vice versa.

Un dispositif destiné à mettre en oeuvre ce procédé de filage en utilisant deux pots par unité de filage a été décrit dans le US-3,343,358. A cet effet, ce dispositif comporte un conduit d'alimentation du faisceau de fibres qui présente deux embranchements dont chacun aboutit à un pot. Chaque embranchement comporte un dispositif de coupe du faisceau et des moyens pneumatiques sont destinés à diriger une extrémité coupée dans l'autre embranchement tandis que d'autres moyens pneumatiques envoient l'autre extrémité coupée formant la fin de la longueur de fil formée dans le premier pot, dans un conduit d'évacuation qui aboutit à un dispositif de bobinage.A device intended to implement this spinning process using two pots per spinning unit has been described in US Pat. No. 3,343,358. To this end, this device comprises a fiber bundle supply conduit which has two branches, each of which leads to a pot. Each branch includes a beam cutting device and pneumatic means are intended to direct a cut end into the other branch while other pneumatic means send the other cut end forming the end. of the length of wire formed in the first pot, in a discharge conduit which leads to a winding device.

Avec ce mode de filage, le fil est tordu en deux phases : lorsqu'il entre dans le pot et lorsqu'il en sort. Il s'ensuit que le fil dans le pot a environ 50-60 % de la torsion finale. De ce fait, la torsion induite au cours de la première phase étant plus faible que celle qui est induite avec le procédé à anneau-curseur par exemple, la torsion remonte moins le long du fil et le manque de cohésion entre les fibres ne permet en général pas d'assurer la continuité du procédé, ce qui explique en partie pourquoi ce procédé ne connait pas d'application industrielle, malgré le fait qu'il permet d'obtenir un fil de haute qualité à une vitesse de production élevée du fait qu'il supprime les problèmes de frottement du système à anneau-curseur.With this spinning mode, the wire is twisted in two phases: when it enters the pot and when it leaves it. It follows that the wire in the pot has about 50-60% of the final twist. As a result, the torsion induced during the first phase being lower than that induced with the ring-cursor process for example, the torsion rises less along the yarn and the lack of cohesion between the fibers does not allow general not to ensure the continuity of the process, which partly explains why this process has no industrial application, despite the fact that it makes it possible to obtain a high quality yarn at a high production speed due to the fact that 'it eliminates the friction problems of the ring-cursor system.

Un autre problème encore non résolu de ce mode de filage vient du fait que dès que l'on coupe le faisceau de fibres pour changer de pot, l'extrémité ainsi libérée que l'on doit amener jusqu'au second pot perd toute sa torsion, n'étant plus attachée au fil qui se trouve dans le pot et les fibres du ruban étiré sortant du train étireur qui sont absolument parallèles ne sont donc pas aptes à supporter la traction nécessaire pour amener cette extrémité dans le second pot. De ce fait, il y a interruption du processus de filage à chaque changement de pot et comme la longueur de fil qui peut être accumulée dans un pot est relativement faible, les interruptions sont fréquentes. C'est sans doute une autre raison pour laquelle ce procédé de filage n'a pas connu de mise en oeuvre industrielle quand bien même son principe date de presque un siècle.Another still unsolved problem of this spinning mode comes from the fact that as soon as one cuts the bundle of fibers to change the pot, the end thus freed which one must bring to the second pot loses all its twist , no longer attached to the wire which is in the pot and the fibers of the stretched ribbon leaving the stretching train which are absolutely parallel are therefore not capable of withstanding the traction necessary to bring this end into the second pot. As a result, the spinning process is interrupted at each change of pot and since the length of yarn that can be accumulated in a pot is relatively small, interruptions are frequent. This is undoubtedly another reason for which this spinning process has not been industrially implemented even though its principle dates back almost a century.

Le filage pneumatique à jet d'air est un autre mode de filage dont on parle depuis un moment comme d'un système très prometteur, en particulier sur le plan de la productivité. On trouve un schéma de principe de ce procédé dans un article paru dans le No 5/1989 du Meilland Textilberichte - page 324 - figure 4. Selon ce procédé, le faisceau de fibres formé à la sortie du train étireur est pris dans un premier tourbillon hélicoïdal dirigé dans un sens puis dans un second tourbillon holicoïdal dirigé en sens inverse. Lorsque l'on examine la structure du fil produit par ce procédé, on remarque que la torsion n'affecte qu'une couche superficielle du fil, alors que les fibres de l'âme restent parallèles et ne participent pas de ce fait à la résistance du fil, comme ceci est montré à la figure 3 - page 318 du même numéro du "Meilland" susmentionné et expliqué sur cette même page.Pneumatic air jet spinning is another spinning mode that has been talked about for a while as a very promising system, particularly in terms of productivity. We find a schematic diagram of this process in an article published in No 5/1989 of Meilland Textilberichte - page 324 - figure 4. According to this process, the bundle of fibers formed at the exit of the stretching train is taken in a first vortex helical directed in one direction then in a second vortex holicoïdal directed in opposite direction. When we examine the structure of the wire produced by this process, we notice that the twist affects only a surface layer of the wire, while the fibers of the core remain parallel and therefore do not participate in the resistance wire, as shown in Figure 3 - page 318 of the same number of the "Meilland" mentioned above and explained on this same page.

Le but de la présente invention est de remédier aux inconvénients des procédés de filage susmentionnés.The object of the present invention is to remedy the drawbacks of the above-mentioned spinning methods.

A cet effet, cette invention a pour objet un procédé de filage centrifuge conforme à la revendication 1, ainsi qu'un métier à filer, conforme à la revendication 2.To this end, the subject of this invention is a centrifugal spinning process according to claim 1, as well as a spinning loom, according to claim 2.

Ce procédé permet d'induire une prétorsion sur le faisceau de fibres sortant du train étireur, suffisante pour l'amener dans les pots de filage où il reçoit la torsion réelle. Ce procédé permet aussi de faire passer le faisceau de fibres d'un pot à l'autre, malgré la coupe du faisceau qui doit intervenir pour permettre ce changement de pot et supprime ainsi la liaison entre le faisceau de fibres sortant du train étireur et les moyens qui lui communiquent une partie de sa torsion. Grâce à ce procédé, il n'y a donc pas rupture du filage malgré la rupture du faisceau et la prétorsion qui lui est communiquée est suffisante pour amener l'extrémité libérée du faisceau dans l'autre pot, où le processus de filage centrifuge se poursuit. Compte tenu du fait que le dans cette première phase, le fil ne reçoit qu'environ 60 % de sa torsion totale, cette prétorsion se révèle également indispensable pour s'ajouter à la torsion qui remonte le long du fil depuis le pot et lui communiquer une cohésion suffisante pour lui permettre de passer de la sortie du train étireur aux pots de filage centrifuge sans se casser. Il faut encore relever que contrairement au système de filage à jet d'air, le fil est constamment tordu dans le même sens de sorte que la torsion affecte l'ensemble des fibres composant le fil.This process makes it possible to induce a pretortion on the bundle of fibers leaving the stretching train, sufficient to bring it into the spinning pots where it receives the real twist. This process also makes it possible to pass the bundle of fibers from one pot to another, despite the cutting of the bundle which must occur to allow this change of pot and thus eliminates the connection between the bundle of fibers leaving the drawing train and the means that communicate part of its twist to it. Thanks to this process, there is therefore no break in the spinning despite the break in the bundle and the pretortion communicated to it is sufficient to bring the released end of the bundle into the other pot, where the centrifugal spinning process takes place. continues. Given the fact that in the first phase, the wire receives only about 60% of its total twist, this pretorsion is also essential to add to the twist that goes up the wire from the pot and communicate it sufficient cohesion to allow it to pass from the outlet of the drawing train to the centrifugal spinning pots without breaking. It should also be noted that, unlike the air jet spinning system, the thread is constantly twisted in the same direction so that the twist affects all of the fibers making up the thread.

Le dessin annexé illustre, schématiquement et à titre d'exemple, une forme d'exécution et une variante du métier à filer pour la mise en oeuvre du procédé objet de l'invention.The accompanying drawing illustrates, schematically and by way of example, an embodiment and a variant of the spinning loom for the implementation of the process which is the subject of the invention.

La figure 1 est une vue en élévation partiellement en coupe de ce dispositif de filage.Figure 1 is an elevational view partially in section of this spinning device.

La figure 2 est une vue en coupe selon la ligne II-II d'un détail de la figure 1.FIG. 2 is a sectional view along line II-II of a detail in FIG. 1.

La figure 3 est une vue partielle agrandie de la figure 1.FIG. 3 is an enlarged partial view of FIG. 1.

La figure 4 est une vue partielle agrandie d'un détail de la figure 3.FIG. 4 is a partial enlarged view of a detail of FIG. 3.

La figure 5 est une vue en perspective d'un dispositif de filage semblable à celui de la figure 1 avec formation d'un fil continu et bobinage de ce fil.Figure 5 is a perspective view of a spinning device similar to that of Figure 1 with formation of a continuous wire and winding of this wire.

La portion de métier à filer illustrée par la figure 1 ne représente qu'une unité de filage centrifuge d'un métier à filer. Seules les parties nécessaires à la compréhension de l'invention ont été illustrées en faisant abstraction des mécanismes d'entraînement qui sont bien connus de l'homme de métier.The portion of spinning loom illustrated in FIG. 1 represents only a centrifugal spinning unit of a spinning loom. Only the parts necessary for understanding the invention have been illustrated without regard to the drive mechanisms which are well known to those skilled in the art.

Le dispositif qui fait partie d'un métier à filer comporte une paire de rouleaux 1, 2 d'alimentation du faisceau de fibres. L'un de ces rouleaux 2 est solidaire d'un arbre d'entraînement 3 entrainé en rotation par le mécanisme moteur du métier à filer. Avantageusement, les rouleaux 1 et 2 constituent la dernière paire de rouleaux d'un train étireur (non représenté).The device which is part of a spinning loom comprises a pair of rollers 1, 2 for feeding the bundle of fibers. One of these rollers 2 is integral with a drive shaft 3 driven in rotation by the motor mechanism of the spinning loom. Advantageously, the rollers 1 and 2 constitute the last pair of rollers of a drawing train (not shown).

A la sortie du train étireur, le faisceau de fibres entre dans un organe d'alimentation 4 dont une coupe est illustrée par la figure 2. Cet organe d'alimentation comporte un conduit 5 dont l'entrée est conique pour recevoir le faisceau de fibres sortant du train étireur et qui se divise en deux embranchements 6 et 7.At the exit of the stretching train, the bundle of fibers enters a feed member 4, a section of which is illustrated in FIG. 2. This feed member comprises a duct 5 whose inlet is conical for receiving the bundle of fibers leaving the stretching train and which is divided into two branches 6 and 7.

Quatre buses 8 débouchent tangentiellement le long du conduit 5. Ces buses 8 communiquent avec un canal annulaire d'alimentation 9 qui communique lui-même avec l'extérieur par une ouverture 10 destinée à relier les buses 8 à une source d'air sous pression (non représentée). Comme illustré par la figure 1, ces buses 8 sont inclinées par rapport à l'axe du conduit 5. Compte tenu de cette inclinaison et du fait que ces buses débouchent tangentiellement dans le conduit 5, elles induisent dans ce conduit un écoulement hélicoïdal se dirigeant vers les embranchements 6 et 7.Four nozzles 8 open tangentially along the duct 5. These nozzles 8 communicate with an annular supply channel 9 which itself communicates with the outside via an opening 10 intended to connect the nozzles 8 to a source of pressurized air (not shown). As illustrated in FIG. 1, these nozzles 8 are inclined relative to the axis of the conduit 5. Taking into account this inclination and the fact that these nozzles open tangentially in the conduit 5, they induce in this conduit a helical flow directing towards branches 6 and 7.

Un tiroir 11 est monté coulissant dans un logement 12 de l'organe d'alimentation. Ce tiroir comporte deux passages 13 et 14 qui sont disposés de manière à relier le conduit 5 respectivement avec les conduits 6 et 7, dans les deux positions limites que le tiroir peut occuper dans le logement 12. Deux ouvertures 15 et 16 sont ménagées respectivement aux deux extrémités du logement 12 pour le relier par deux lignes d'alimentation distinctes 17 respectivement 18 sélectivement à une source d'air sous pression (non représentée) par l'intermédiaire d'une vanne de commande 19, de sorte que le tiroir 11 peut être déplacé entre ses deux positions limites pour relier le conduit 5 soit avec le conduit 6 soit avec le conduit 7. Il est à relever que l'espace séparant les entrées des passages 13 et 14 du tiroir 11 est légèrement inférieur aux diamètres du conduit 5 de sorte qu'en déplaçant le tiroir 11 entre ses deux positions, l'air sous pression peut toujours s'écouler dans les conduits 6 et 7 et n'est pas refoulé à contre courant dans le conduit 5, ce qui interromprait le processus de filage.A drawer 11 is slidably mounted in a housing 12 of the supply member. This drawer has two passages 13 and 14 which are arranged so as to connect the conduit 5 respectively with the conduits 6 and 7, in the two limit positions that the drawer can occupy in the housing 12. Two openings 15 and 16 are formed respectively at the two ends of the housing 12 for connecting it by two separate supply lines 17 respectively 18 selectively to a source of pressurized air (not shown) via a control valve 19, so that the drawer 11 can be moved between its two limit positions to connect the duct 5 either with the duct 6 or with the duct 7. It should be noted that the space separating the entries from the passages 13 and 14 of the drawer 11 is slightly less than the diameters of the duct 5 so that by moving the slide 11 between its two positions, the pressurized air can still flow in the conduits 6 and 7 and is not discharged against the current in the conduit 5, this which would interrupt the spinning process.

En déplaçant le tiroir 11 de l'une à l'autre position limite, les bords des ouvertures d'entrée des passages 13 et 14 se déplacent par rapport à l'ouverture de sortie du conduit 5 ce qui permet de cisailler le faisceau de fibres. Au contraire, la face du tiroir 11 située entre les sorties des passages 13 et 14 ménage un jeu 11a avec la paroi du logement 12 pour éviter de pincer l'extrémité du faisceau de fibres qui a été coupé.By moving the slide 11 from one to the other limit position, the edges of the inlet openings of the passages 13 and 14 move relative to the outlet opening of the duct 5 which allows the fiber bundle to be sheared . On the contrary, the face of the drawer 11 located between the outlets of the passages 13 and 14 provides a clearance 11a with the wall of the housing 12 to avoid pinching the end of the bundle of fibers which has been cut.

Comme illustré par la figure 1, chaque embranchement 6 et 7 conduit à un pot de filage centrifuge 20 respectivement 21 en passant à travers un organe d'extraction 22 respectivement 23. Ces pots sont entraînés en rotation par des moyens (non représentés). Les parties tubulaires 24 respectivement 25 conduisant des organes d'extraction 22,23 dans les pots respectifs 20 et 21 est entourée d'un tube télescopique 26 respectivement 27. Ces tubes télescopiques sont solidaires d'un support 28 entraîné dans un mouvement vertical alternatif comme indiqué par les doubles flèches F, par un mécanisme d'entraînement de la machine (non représenté). Les extrémités inférieures de ces tubes télescopiques 26,27 sont de ce fait déplacées le long des axes longitudinaux des pots de filage centrifuge 20, respectivement 21, afin de répartir le fil sortant à la base de ce tube télescopique, le long des faces latérales internes des pots de filage centrifuge 20 et 21.As illustrated in FIG. 1, each branch 6 and 7 leads to a centrifugal spinning pot 20 respectively 21 passing through an extraction member 22 respectively 23. These pots are driven in rotation by means (not shown). The tubular parts 24 respectively 25 leading to the extraction members 22, 23 in the respective pots 20 and 21 is surrounded by a telescopic tube 26 respectively 27. These telescopic tubes are integral with a support 28 driven in an alternating vertical movement as indicated by the double arrows F, by a drive mechanism of the machine (not shown). The lower ends of these telescopic tubes 26, 27 are therefore displaced along the longitudinal axes of the centrifugal spinning pots 20, respectively 21, in order to distribute the wire exiting at the base of this telescopic tube, along the internal lateral faces. centrifugal spinning pots 20 and 21.

Chaque tube télescopique 26,27 est entouré d'un manchon 29 respectivement 30 qui a pour but de ménager à son extrémité un profil évasé 31 par exemple, comme illustré par la figure 4, servant au guidage du faisceau de fibres avant qu'il ne quitte l'extrémité de ce manchon 29 pour se déposer sur la face interne du pot 20. Ce profil évasé 31 est relié à la face latérale externe du manchon 29 par un profil convexe 32. Cette forme de l'extrémité inférieure du manchon 29 a été étudiée afin d'éviter que le faisceau de fibres qui en sort ne s'enroule autour de ce manchon en particulier au cours de la descente du tube télescopique 26, lorsque le faisceau de fibres fait un angle aigu avec la face externe du manchon 29.Each telescopic tube 26, 27 is surrounded by a sleeve 29 respectively 30 which aims to provide at its end a flared profile 31 for example, as illustrated in FIG. 4, serving to guide the bundle of fibers before it leaves the end of this sleeve 29 to deposit on the internal face of the pot 20. This flared profile 31 is connected to the external lateral face of the sleeve 29 by a convex profile 32. This shape of the lower end of the sleeve 29 has has been studied in order to prevent the bundle of fibers emerging therefrom from wrapping around this sleeve, in particular during the descent of the telescopic tube 26, when the bundle of fibers makes an acute angle with the external face of the sleeve 29 .

Deux conduits d'évacuation 33,34 sortent des organes d'extraction 22 respectivement 23 et aboutissent à une bobine de stockage du fil 41 produit dans les pots 20 et 21. Des buses 35 et 36 reliées sélectivement à la source d'air sous pression (non représentée) par les conduits d'alimentation 18 respectivement 17 débouchent dans les conduits 6 respectivement 7 en formant un angle oblique dirigeant le jet d'air dans les conduits d'évacuation 33 respectivement 34. Deux obturateurs 37 et 38 sont montés coulissants dans les organes d'extraction 22 respectivement 23 parallèlement aux conduits 6 respectivement 7, juste au niveau de l'embranchement des conduits d'extraction 33 respectivement 34. Ces obturateurs 37 et 38 sont chacun solidaires d'un dispositif d'actionnement pneumatique 39 respectivement 40 comprenant un cylindre et un piston à double effet, connectés de façon inverse l'un par rapport à l'autre aux conduits d'alimentation 17 et 18, de manière que l'un des obturateurs ferme son conduit d'évacuation quant l'autre l'ouvre et inversement, comme illustré par la figure 1.Two evacuation conduits 33, 34 exit from the extraction members 22 respectively 23 and terminate in a reel for storing the wire 41 produced in the pots 20 and 21. Nozzles 35 and 36 selectively connected to the source of pressurized air (not shown) by the supply conduits 18 respectively 17 open into the conduits 6 respectively 7 by forming an oblique angle directing the air jet in the evacuation conduits 33 respectively 34. Two shutters 37 and 38 are slidably mounted in the extraction members 22 respectively 23 parallel to the conduits 6 respectively 7, just at the junction of the extraction conduits 33 respectively 34. These shutters 37 and 38 are each integral with a pneumatic actuating device 39 respectively 40 comprising a cylinder and a double-acting piston, connected in inverse relation to one another to the supply conduits 17 and 18, so that one of the obturates urs closes its exhaust duct while the other opens it and vice versa, as illustrated in Figure 1.

La figure 5 montre une variante selon laquelle il est possible de produire un fil en continu avec le procédé de filature centrifuge objet de l'invention.Figure 5 shows a variant according to which it is possible to produce a continuous yarn with the centrifugal spinning process object of the invention.

On reconnait sur cette figure l'organe d'alimentation 4 disposé à la sortie du train étireur dont les rouleaux de sortie 1 et 2 délivrent le faisceau de fibres étiré obtenu à partir d'un ruban de fibres R. On reconnait les embranchements 6 et 7 sortant de l'organe d'alimentation, les organes d'extraction 22,23, les pots de filature centrifuge 20,21 ainsi que les conduits d'évacuation 33 et 34. Ces conduits entrent dans un premier dispositif de réserve de fil 43 de type connu qui permet d'amener du fil et de l'extraire à des vitesses variables. Suit un dispositif de rattache de fils 42 qui est de préférence un dispositif de rattache tel que celui décrit dans le EP-A1-0 249 578 appartenant au déposant. Ce dispositif de rattache est suivi par un second dispositif d'alimentation à réserve de fil 43a connu. Ces dispositifs de réserve de fil connus sont par exemple, du type de celui qui est décrit dans le US-3,796,384. Un tel dispositif d'alimentation permet de recevoir du fil à vitesse variable et, grâce à sa réserve de le fournir simultanément à une autre vitesse. Une bobine 44 associée à un arbre de bobinage 45 entraîné par le mécanisme d'entraînement du métier à filer, reçoit en continu le fil sortant du dispositif d'alimentation à réserve de fil 43a. La vitesse de bobinage correspond à la vitesse de filage.We recognize in this figure the feed member 4 disposed at the outlet of the stretching train, the outlet rollers 1 and 2 deliver the drawn bundle of fibers obtained from a fiber ribbon R. We recognize the branches 6 and 7 leaving the supply member, the extraction members 22,23, the centrifugal spinning pots 20,21 as well as the discharge conduits 33 and 34. These conduits enter a first wire reserve device 43 of known type which makes it possible to feed and extract wire at variable speeds. There follows a device for reattaching wires 42 which is preferably a reattaching device such as that described in EP-A1-0 249 578 belonging to the applicant. This reattachment device is followed by a second known wire supply device 43a. These known wire reserve devices are, for example, of the type described in US Pat. No. 3,796,384. Such a feeding device makes it possible to receive wire at variable speed and, thanks to its reserve, to supply it simultaneously at another speed. A reel 44 associated with a winding shaft 45 driven by the drive mechanism of the spinning loom, continuously receives the thread leaving the feed device with reserve of thread 43a. The winding speed corresponds to the spinning speed.

Revenons maintenant aux figures 1 à 4 pour examiner le fonctionnement du dispositif pour la mise oeuvre du procédé de filage objet de l'invention.Let us now return to FIGS. 1 to 4 to examine the operation of the device for implementing the spinning method which is the subject of the invention.

Le faisceau de fibres étiré sortant du train étireur 1,2 entre dans le conduit 5 de l'organe d'alimentation 4 et est soumis à la force hélicoïdale induite par les écoulements d'air sortant des buses 8. En arrivant aux embranchements 6 et 7, l'air sous pression entraînant avec lui le fil se dirige dans celui des embranchements qui est ouvert, c'est-à-dire celui qui est relié au conduit 5 par un passage 13 ou 14. Dans cet exemple, c'est l'embranchement 6 qui est ouvert. Le fil qui a subi une prétorsion dans le conduit 5 passe alors dans le conduit 6, traverse l'organe d'extraction 22 et aboutit dans le pot de filage centrifuge 20 à la sortie du tube télescopique 26 animé d'un mouvement vertical de sens alternatif pour répartir le fil contre la paroi latérale interne de ce pot de filage.The drawn bundle of fibers leaving the drawing train 1,2 enters the duct 5 of the supply member 4 and is subjected to the helical force induced by the air flows leaving the nozzles 8. When arriving at the branches 6 and 7, the pressurized air carrying with it the wire is directed into that of the branch lines which is open, that is to say that which is connected to the conduit 5 by a passage 13 or 14. In this example, it is the branch 6 which is open. The wire which has undergone a pretortion in the conduit 5 then passes through the conduit 6, passes through the extraction member 22 and terminates in the centrifugal spinning pot 20 at the outlet of the telescopic tube 26 animated by a vertical movement in an alternating direction to distribute the wire against the internal side wall of this spinning pot.

Lorsqu'une certaine quantité de fil a ainsi été déposée en subissant une torsion déterminée induite par la rotation du pot de filage centrifuge 20, la vanne 19 commute la source d'air sous pression du conduit d'alimentation 17 au conduit d'alimentation 18. Le tiroir 11 est poussé de gauche à droite dans le logement 12, coupant ainsi le fil et simultanément faisant communiquer le conduit 5 avec l'embranchement 7 à travers le passage 14. L'air qui ne peut plus s'écouler dans l'embranchement 6 se dirige alors vers le pot de filage 21 à travers l'embranchement 7, l'organe d'éjection 23, le conduit 25 et le tube télescopique 27.When a certain quantity of wire has thus been deposited undergoing a determined torsion induced by the rotation of the centrifugal spinning pot 20, the valve 19 switches the source of pressurized air from the supply duct 17 to the supply duct 18 The drawer 11 is pushed from left to right in the housing 12, thereby cutting the wire and simultaneously communicating the conduit 5 with the branch 7 through the passage 14. The air which can no longer flow into the branch line 6 then goes to the spinning pot 21 through branch line 7, the ejection member 23, the conduit 25 and the telescopic tube 27.

Au même instant également, de l'air sous pression est envoyé dans le canal d'évacuation 33 à travers la buse 35 pour diriger l'extrémité libérée du fil dans le conduit d'évacuation 33 et pour tirer le fil hors du pot de filage 20. Etant donné que celui-ci continue de tourner pendant l'opération d'extraction du fil, une torsion axiale additionnelle est induite sur le fil, de sorte que la torsion se produit aussi bien en entrant qu'en sortant du pot de filage centrifuge.Also at the same time, pressurized air is sent into the evacuation channel 33 through the nozzle 35 to direct the released end of the wire into the evacuation duct 33 and to draw the wire out of the spinning pot. 20. Since the latter continues to rotate during the wire extraction operation, an additional axial twist is induced on the wire, so that the twist occurs both when entering and exiting the spinning pot centrifugal.

Pendant ce temps le filage du faisceau de fibres sortant en continu du train étireur continue dans le pot de filage centrifuge 21. Au moment où le faisceau est coupé par le déplacement du tiroir 11, la nouvelle extrémité liée au fil sortant du train étireur ne reçoit plus la torsion qui remonte du pot de filature centrifuge. Toutefois, grâce à l'écoulement hélicoïdal communiqué à l'air sous pression sortant des buses 8, la prétorsion qui est ainsi induite sur le faisceau de fibres au fur et à mesure qu'il sort du train étireur, lui donne une cohésion suffisante pour permettre d'amener le faisceau dans le second pot de filage centrifuge 21.During this time, the spinning of the bundle of fibers continuously leaving the stretching train continues in the centrifugal spinning pot 21. When the bundle is cut by the movement of the slide 11, the new end linked to the thread leaving the stretching train does not receive plus the twist that goes up from the centrifugal spinning pot. However, thanks to the helical flow communicated to the pressurized air exiting the nozzles 8, the pretortion which is thus induced on the fiber bundle as it leaves the drawing train, gives it sufficient cohesion to allow the beam to be brought into the second centrifugal spinning pot 21.

La figure 5 illustre une solution permettant de transformer ce procédé de filature par nature discontinu en un procédé continu en partant directement d'un ruban R de fibres cardé, comme dans un procédé de filage "open-end", mais avec une qualité de fil égale voire supérieure à celle d'un système à anneau-curseur.FIG. 5 illustrates a solution making it possible to transform this spinning process by nature discontinuous into a continuous process starting directly from a ribbon R of fibers carded, as in an "open-end" spinning process, but with a wire quality equal to or even superior to that of a ring-cursor system.

Le fil est amené depuis un pot 20 respectivement 21 au premier dispositif à réserve de fil 43. Une autre longueur de fil se trouve stockée sur le second dispositif à réserve de fil 43a qui alimente en continu la bobine 44. L'extrémité avant de la longueur de fil en cours de bobinage sur le dispositif à réserve de fil 43 est directement amenée dans le dispositif de rattache 42. Celui-ci retient déjà l'extrémité arrière du fil stocké sur le dispositif à réserve de fil 43a. Les deux extrémités sont rattachées comme décrit dans le EP-A1-0 249 578 pendant que le fil est bobiné sur le premier dispositif à réserve de fil 43 et extrait du second dispositif à réserve de fil 43a pour alimenter la bobine 44 en continu. Dès que la rattache est effectuée et que le fil n'est plus retenu par le dispositif de rattache, il est bobiné sur le second dispositif à réserve de fil 43a et son extrémité arrière est retenue dans le dispositif de rattache 42 pour être rattachée à l'extrémité avant de la longueur de fil extraite de l'autre pot de filage et le cycle se répète ainsi constamment. La vitesse de bobinage de la bobine 44 correspond exactement à la vitesse de production du fil. Le second dispositif à réserve de fil doit avoir une vitesse de stockage plus élevée que la vitesse de production pour tenir compte du temps d'arrêt nécessaire à la rattache. Le premier dispositif à réserve de fil effectue le stockage pendant la rattache mais il ne peut se vider qu'une fois la rattache terminée et donc à la même vitesse que le fil est stocké sur le second dispositif à réserve de fil 43a. Il faut donc également que sa vitesse de stockage soit plus élevée que la vitesse de production du fil, puisqu'il doit être chargé et déchargé pendant la durée de remplissage d'un pot de filature centrifuge.The wire is brought from a pot 20 respectively 21 to the first wire reserve device 43. Another length of wire is stored on the second wire reserve device 43a which continuously feeds the spool 44. The front end of the length of wire being wound on the wire reserve device 43 is brought directly into the reattachment device 42. This already retains the rear end of the wire stored on the wire reserve device 43a. The two ends are connected as described in EP-A1-0 249 578 while the wire is wound on the first wire reserve device 43 and extracted from the second wire reserve device 43a to feed the coil 44 continuously. As soon as the reattachment is carried out and the thread is no longer retained by the reattachment device, it is wound on the second device with reserve of yarn 43a and its rear end is retained in the reattachment device 42 to be attached to the 'front end of the length of wire extracted from the other spinning pot and the cycle is thus repeated constantly. The winding speed of the reel 44 corresponds exactly to the speed of production of the wire. The second wire reserve device must have a higher storage speed than the production speed to take account of the downtime required for the reattachment. The first wire reserve device performs storage during the reattachment but it can only be emptied once the reattachment is finished and therefore at the same speed as the wire is stored on the second wire reserve device 43a. It is therefore also necessary that its storage speed be higher than the speed of production of the yarn, since it must be loaded and unloaded during the filling time of a centrifugal spinning pot.

Claims (8)

Procédé de filage centrifuge selon lequel on dépose le faisceau de fibres produit à partir d'un train étireur contre la face latérale d'un pot entraîné en rotation, on coupe le faisceau en amont de ce pot dès qu'une certaine longueur de fil est accumulée contre cette paroi, on dirige l'une des extrémités coupées, formant la fin de cette longueur de fil ainsi accumulée vers une bobine de stockage et on dirige l'autre extrémité coupée contre la face latérale d'un second pot entraîné en rotation, on coupe à nouveau le faisceau dès qu'une certaine longueur de fil est accumulée contre la paroi latérale de ce second pot et on répète ce cycle en continu, caractérisé par le fait qu'entre la sortie dudit train étireur et le point où l'on coupe le faisceau, on induit sur ce faisceau une force hélicoïdale pour amener ladite autre extrémité coupée alternativement contre les faces latérales respectives desdits pots en communiquant à ce faisceau une prétorsion pour lui permettre de supporter la composante de traction exercée sur lui.Centrifugal spinning method according to which the bundle of fibers produced from a drawing train is deposited against the side face of a pot driven in rotation, the bundle is cut upstream of this pot as soon as a certain length of yarn is accumulated against this wall, one of the cut ends is directed, forming the end of this length of wire thus accumulated towards a storage reel and the other cut end is directed against the side face of a second pot driven in rotation, the beam is cut again as soon as a certain length of wire is accumulated against the side wall of this second pot and this cycle is repeated continuously, characterized in that between the exit of said stretching train and the point where the the beam is cut, a helical force is induced on this beam to bring said other cut end alternately against the respective lateral faces of said pots by communicating a pretortion p to this beam or allow it to support the traction component exerted on it. Métier à filer, comprenant deux pots de filage centrifuge (20,21) pour recevoir alternativement le faisceau de fibres, un conduit (5) divisé en deux embranchement (6,7) pour guider ce faisceau vers chacun desdits pots et deux passages d'extraction du fil (33,34) communiquant respectivement avec chaque embranchement, des moyens (28) pour provoquer un déplacement relatif entre l'extrémité de sortie des embranchements et lesdits pots (20,21) dans la direction axiale de ces pots, des moyens (8) destinés à être reliés à une source de fluide sous pression pour envoyer ce fluide dans ce conduit (5) en vue d'entraîner le faisceau, des moyens de coupe (11,13,14) du faisceau disposés au début de chaque embranchement (6,7), des moyens (11,13,14) pour faire passer le faisceau de l'un à l'autre embranchement et des moyens d'extraction (35,36) de l'extrémité coupée du fil, caractérisé par le fait que les moyens (8) pour envoyer un fluide sous pression dans ledit conduit (5) sont constitués par des buses agencées pour lui communiquer un écoulement hélicoïdal afin d'induire simultanément une prétorsion et une traction sur le faisceau de fibres.Spinning machine, comprising two centrifugal spinning pots (20,21) for alternately receiving the bundle of fibers, a conduit (5) divided into two branches (6,7) to guide this bundle towards each of said pots and two passages for extraction of the wire (33,34) communicating respectively with each branch, means (28) for causing a relative displacement between the outlet end of the branches and said pots (20,21) in the axial direction of these pots, means (8) intended to be connected to a source of pressurized fluid to send this fluid into this conduit (5) in order to entrain the beam, means for cutting (11,13,14) of the beam arranged at the start of each branch (6,7), means (11,13,14) for passing the bundle from one to the other branch and means for extracting (35,36) from the cut end of the wire, characterized by the fact that the means (8) for sending a fluid under pressure into said conduit (5) are constituted by nozzles arranged to communicate a helical flow to it to induce pretorsion and traction on the fiber bundle simultaneously. Métier à filer selon la revendication 2, caractérisé par le fait que les moyens de coupe (11,13,14) sont conformés pour obturer et dégager alternativement la section de passage des embranchements respectifs (6,7) et servent ainsi de moyens pour faire passer le faisceau de fibres de l'un à l'autre embranchement.Spinning machine according to claim 2, characterized in that the cutting means (11,13,14) are shaped to alternately close and clear the passage section of the respective branches (6,7) and thus serve as means for making pass the bundle of fibers from one to the other branch. Métier à filer selon la revendication 2, caractérisé par le fait que les moyens d'extraction (35,36) comportent des conduits d'extraction (33,34) dont les sorties aboutissent à un dispositif à réserve de fil (43) sur lequel le fil peut être alimenté et extrait à des vitesses différentes, la sortie de ce dispositif servant à alimenter un dispositif de rattache de fil (42) qui est suivi par un second dispositif à réserve de fil (43a) sur lequel le fil peut être alimenté et extrait à des vitesses différentes, la sortie de ce second dispositif servant à alimenter une bobine de stockage (44).Spinning machine according to claim 2, characterized in that the extraction means (35,36) comprise extraction conduits (33,34), the outputs of which lead to a wire reserve device (43) on which the wire can be fed and extracted at different speeds, the output of this device serving to feed a wire joining device (42) which is followed by a second wire reserve device (43a) on which the wire can be fed and extracts at different speeds, the output of this second device serving to supply a storage coil (44). Métier à filer selon la revendication 2, caractérisé par le fait que des organes obturateurs mobiles (37,38) sont montés respectivement aux intersections entre les embranchements (6,7) et les conduits d'extractions (33,34), ces organes obturateurs étant associés à des moyens d'actionnement à double action reliés sélectivement à une source d'énergie en opposition de phase l'un par rapport à l'autre de manière que l'un de ces organes soit en position de fermeture de son conduit d'extraction quand l'autre est en position d'ouverture et inversément.Spinning machine according to claim 2, characterized in that movable shutter members (37,38) are mounted respectively at the intersections between the branches (6,7) and the extraction ducts (33,34), these shutter members being associated with double action actuation means selectively connected to a source of energy in phase opposition with respect to one another so that one of these members is in the closed position of its conduit d extraction when the other is in the open position and vice versa. Métier à filer selon la revendication 2, caractérisé par le fait que lesdits moyens (11,13,14) pour faire passer le faisceau de fibres de l'un à l'autre embranchement, comportent un tiroir (11) monté coulissant dans un logement (12) dont les deux extrémités sont reliées sélectivement à une source de fluide sous pression pour déplacer le tiroir entre deux positions limites, celui-ci comportant deux passages (13,14) disposés pour faire communiquer alternativement ledit conduit (5) avec les deux embranchements (6,7) dans les deux positions limites respectives du tiroir (11).Spinning machine according to claim 2, characterized in that said means (11,13,14) for passing the bundle of fibers from one to the other branch, comprise a drawer (11) mounted to slide in a housing (12), the two ends of which are selectively connected to a source of pressurized fluid to move the slide between two limit positions, the latter comprising two passages (13, 14) arranged to make said duct (5) communicate alternately with the two branches (6,7) in the two respective limit positions of the drawer (11). Métier à filer selon la revendication 6, caractérisé par le fait que l'écartement entre les ouvertures d'entrée des passages (13.14) est inférieur au diamètre dudit conduit (5).Spinning machine according to claim 6, characterized in that the spacing between the inlet openings of the passages (13.14) is less than the diameter of said duct (5). Métier à filer selon la revendication 5, caractérisé par le fait que les extrémités de sortie respectives de deux embranchements sont ménagées par un élément télescopique (26) solidaire de moyens d'entraînement (28) selon un mouvement axial alternatif et que ces extrémités de sortie sont conformées pour présenter une partie évasée (31) entourée par une face annulaire (32) dont l'inclinaison par rapport à l'axe de l'élément télescopique (26) est inversée par rapport à ladite partie évasée.Spinning machine according to claim 5, characterized in that the respective outlet ends of two branches are formed by a telescopic element (26) integral with drive means (28) in an alternating axial movement and that these outlet ends are shaped to have a flared part (31) surrounded by an annular face (32) whose inclination relative to the axis of the telescopic element (26) is reversed relative to said flared part.
EP91500048A 1991-05-22 1991-05-22 Process for centrifugal spinning Withdrawn EP0515762A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP91500048A EP0515762A1 (en) 1991-05-22 1991-05-22 Process for centrifugal spinning
JP13104892A JPH05163621A (en) 1991-05-22 1992-05-22 Method of centrifugal fine spinning and fine spinning machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP91500048A EP0515762A1 (en) 1991-05-22 1991-05-22 Process for centrifugal spinning

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EP0515762A1 true EP0515762A1 (en) 1992-12-02

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EP91500048A Withdrawn EP0515762A1 (en) 1991-05-22 1991-05-22 Process for centrifugal spinning

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5369946A (en) * 1992-02-14 1994-12-06 Pujol-Isern; Carlos Continuous centrifugal spinning method and spinning frame for practicing the method
EP0651078A1 (en) * 1993-11-03 1995-05-03 Carlos Pujol-Isern Process for centrifugal spinning
WO1997008367A1 (en) * 1995-08-24 1997-03-06 Csm-Sächsische Spinnereimaschinen Gmbh Centrifugal spinning and winding machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3314223A (en) * 1962-10-30 1967-04-18 Bobkowicz Emilian Apparatus for yarn production
US3343358A (en) * 1967-01-17 1967-09-26 Maremont Corp Pot spinning and twisting apparatus
DE3732708A1 (en) * 1987-01-15 1988-07-28 Stahlecker Fritz AIR NOZZLE FOR PNEUMATIC SPIRAL SPINNING WITH A THREAD CHANNEL MADE OF AT LEAST TWO SECTIONS

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3314223A (en) * 1962-10-30 1967-04-18 Bobkowicz Emilian Apparatus for yarn production
US3343358A (en) * 1967-01-17 1967-09-26 Maremont Corp Pot spinning and twisting apparatus
DE3732708A1 (en) * 1987-01-15 1988-07-28 Stahlecker Fritz AIR NOZZLE FOR PNEUMATIC SPIRAL SPINNING WITH A THREAD CHANNEL MADE OF AT LEAST TWO SECTIONS

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5369946A (en) * 1992-02-14 1994-12-06 Pujol-Isern; Carlos Continuous centrifugal spinning method and spinning frame for practicing the method
EP0651078A1 (en) * 1993-11-03 1995-05-03 Carlos Pujol-Isern Process for centrifugal spinning
WO1997008367A1 (en) * 1995-08-24 1997-03-06 Csm-Sächsische Spinnereimaschinen Gmbh Centrifugal spinning and winding machine

Also Published As

Publication number Publication date
JPH05163621A (en) 1993-06-29

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