EP0651078A1 - Process for centrifugal spinning - Google Patents

Process for centrifugal spinning Download PDF

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Publication number
EP0651078A1
EP0651078A1 EP93500149A EP93500149A EP0651078A1 EP 0651078 A1 EP0651078 A1 EP 0651078A1 EP 93500149 A EP93500149 A EP 93500149A EP 93500149 A EP93500149 A EP 93500149A EP 0651078 A1 EP0651078 A1 EP 0651078A1
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EP
European Patent Office
Prior art keywords
wire
conduits
conduit
spinning
thread
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Granted
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EP93500149A
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German (de)
French (fr)
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EP0651078B1 (en
Inventor
Carlos Pujol-Isern
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Individual
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Individual
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Priority to EP19930500149 priority Critical patent/EP0651078B1/en
Priority to DE1993626615 priority patent/DE69326615T2/en
Priority to ES93500149T priority patent/ES2139643T3/en
Priority to JP26981794A priority patent/JP3326026B2/en
Publication of EP0651078A1 publication Critical patent/EP0651078A1/en
Application granted granted Critical
Publication of EP0651078B1 publication Critical patent/EP0651078B1/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
    • D01H1/08—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 method for continuously producing a wire of indefinite length, according to which two centrifugal spinning pots are supplied alternately by two respective supply conduits, both originating at the outlet of a stretching train, periodically separating the wire at the junction of the two conduits, communicating a pretortion to the bundle of fibers leaving the stretching train by a jet of helical air and directing this end into the other of said conduits.
  • the object of the present invention is to remedy the aforementioned drawbacks.
  • the subject of this invention is, first of all, a centrifugal spinning process intended to produce a wire in according to claim 1, as well as a centrifugal spinning device intended to produce a continuous yarn according to claim 2.
  • Figures 1 to 4 are four sectional elevation views of the spinning device illustrating four characteristic phases of the spinning process.
  • the spinning device which is the subject of the invention comprises a drawing train of which only the outlet, in the form of two rollers 1, 2 is shown.
  • a conduit 3 is arranged to collect the drawn bundle of fibers 4 leaving the drawing train.
  • This conduit 3 is divided into two branches 5 and 6, the outlets of which are aligned on two conduits 5 ′, respectively 6 ′, which terminate in two centrifugal spinning pots 7 and 8 respectively.
  • Mechanisms serving to distribute the wire along the walls internal pots are not shown, but may be like those illustrated and described in EP-A1-515,762.
  • Two storage coils 9 and 10 are arranged in the space separating the conduits 5 and 6 from the conduits 5 'and 6'. Opposite each of these storage coils 9 and 10, on the other side of the path of the wire passing from the outlet of the conduits 5, 6 to the inlet of the conduits 5 ', 6', is a plunger 11, 12 secured to a piston 13, respectively 14, mounted in a pneumatic cylinder 15, respectively 16, against the pressure of a return spring 17, respectively 18.
  • a winding coil 19 is intended for collect the wire from the storage spools 9 and 10, for example, as described in the aforementioned EP 925000015.0, this part of winding the wire not being necessary for the understanding of the present invention.
  • a series of nozzles 20 is angularly distributed around the duct 3. These nozzles are selectively connected via a timer 21 to a source of pressurized air S. These nozzles 20 are arranged so as to create, in the duct 3, a helical flow of pressurized air directed downstream. Two other series of nozzles 22 and 23 are arranged downstream in each of the branches 5 and 6. They are selectively connected to the source of pressurized air S by the timer 21 and a switching valve 24. These nozzles 22 and 23 are also oriented to form a helical air flow in branches 5 and 6.
  • Two additional nozzles 25 and 26 can be directed in the axis of the wire at the birth of each branch 5 and 6 and located in the plane common to these two branches. These nozzles 25 and 26 are selectively connected to the source of pressurized air S by the timer 21 and the switching valve 24.
  • the source of pressurized air S is also selectively connected, via the timer 21 and the switching valve 24, to the two pneumatic cylinders 15, 16, as well as to two ejectors 27 and 28, located along the conduits 5 'and 6', respectively, to create a vacuum at the inlet of these conduits.
  • the switching valve 24 makes it possible to switch the pressure source S on two separate circuits, A and B, the circuit A supplying the series of nozzles 22, the nozzle 26, the pneumatic cylinder 16 and the ejector 27, circuit B supplying the series of nozzles 23, the nozzle 25, the pneumatic cylinder 15 and the ejector 28.
  • the series of nozzles 20 is supplied each time the timer connects circuits A or B to the air source under pressure S.
  • FIG. 1 illustrates a phase of the spinning cycle during which the thread of the centrifugal spinning pot 7 is transferred to the storage reel 9, while the thread is in spinning in the other pot 8. Simultaneously, the wire previously wound on the storage reel 10 is transferred to the winding reel 19.
  • the timer switches the switching valve 24 to the aforementioned circuit A, which is drawn in strong lines in FIG. 2, which illustrates the effect produced by this pressurization of circuit A.
  • circuit A is pressurized, the pusher 12 pinches the wire against the storage coil 10. This pinching of the wire has the effect of isolating the part of the wire located between the pinch point and the exit of the drawing train 1, 2 from the source of torsion communicated to the wire by the spinning pot 8.
  • the nozzles 20 communicate a twist to this portion of the wire.
  • the nozzles 22 exert a vacuum at the inlet of the conduit 5 and that the nozzle 26 can project a jet of pressurized air against the wire the latter, having virtually no more cohesion, breaks with place where it is stressed by the depression due to the nozzles 22 and by the jet of the nozzle 26.
  • the storage reel 10 driven in rotation in the direction of the arrow winds both the portion of wire leaving the conduit 6 and the wire of the pot 8.
  • the end of the bundle of fibers leaving the stretching train 1, 2 it is immediately subjected to a torsional effect by the nozzles 20, so that this bundle of fibers regains cohesion.
  • the distance between the pinch point of the rollers 1, 2 and the nozzles 20 is chosen to be less than the average length of the fibers. Then, at the entrance to the branch 5, the wire receives an S-shaped twist communicated by the nozzles 22, which gives it a cohesion capable of reaching the spinning pot 7.

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

Abstract

The spinning apparatus comprises two centrifugal spinning cans (7, 8) fed alternately by two conduits (5, 5'; 6, 6') connecting a drawframe to these spinning cans (7, 8) and commencing at a junction located at the exit of a common conduit (3). Each conduit (5, 6) comprises a set of nozzles (22, 23) intended for generating a helical flow. Two storage bobbins (9, 10) are arranged between the two parts of the conduits (5, 5'; 6, 6') in order to receive the spun thread in the cans (7, 8). Two pneumatically actuated pushers (11, 12) are intended for nipping the thread against the storage bobbins and at the same time interrupting the increase in the twist in the thread. Since, simultaneously with the actuation of one of the pushers (11, 12), the set of nozzles (22, 23) arranged in the conduit (5, 6) which is to receive the thread generates a helical air flow in this conduit at the moment when the spinning can is changed, the thread is sucked into this conduit. Because it no longer receives any twist after the nipping of the thread, the force thus exerted makes it possible to separate it and to direct the bundle of fibres (4) into the new conduit where it receives a twist. Another injector (20) is arranged at the exit of the drawframe (1, 2) in order to impart the sufficient cohesion of the fibres making it possible to maintain uniformity and is actuated with a predetermined delay in relation to the nozzles (22, 23) in order to assist the release of the thread and the change of conduit. <IMAGE>

Description

La présente invention se rapporte à un procédé de filage centrifuge destiné à produire en continu un fil de longueur indéfinie, selon lequel on alimente alternativement deux pots de filage centrifuge par deux conduits d'alimentation respectifs, prenant tous deux naissance à la sortie d'un train étireur, en séparant périodiquement le fil au niveau de la jonction des deux conduits, en communiquant une prétorsion au faisceau de fibres sortant du train étireur par un jet d'air hélicoïdal et en dirigeant cette extrémité dans l'autre desdits conduits.The present invention relates to a centrifugal spinning method for continuously producing a wire of indefinite length, according to which two centrifugal spinning pots are supplied alternately by two respective supply conduits, both originating at the outlet of a stretching train, periodically separating the wire at the junction of the two conduits, communicating a pretortion to the bundle of fibers leaving the stretching train by a jet of helical air and directing this end into the other of said conduits.

On connaît déjà un tel procédé de filage centrifuge décrit dans le EP-A1-515.762. Dans ce document, l'extrémité arrière du fil, sectionné au niveau de la jonction, enroulé contre la face interne d'un pot de filage, est dirigée sur une bobine de bobinage par un jet d'air.We already know such a centrifugal spinning process described in EP-A1-515,762. In this document, the rear end of the wire, sectioned at the junction, wound against the internal face of a spinning pot, is directed onto a winding reel by an air jet.

Dans la demande EP 925000015.0, le jet d'air est remplacé par un poussoir qui applique le fil contre une bobine de stockage au moment précis où le fil est coupé à la jonction des deux conduits. Il apparaît que la synchronisation de ces deux fonctions mécaniques est difficile à garantir et que des décalages peuvent se produire avec le temps. De ce fait, il existe un risque que le poussoir arrive contre la surface de la bobine de stockage après le passage de l'extrémité coupée du fil. Dans ce cas, cette extrémité part dans le pot de filage et le processus de filage est interrompu. Un autre inconvénient de cette solution réside dans l'utilisation d'un couteau pour couper le fil, dans la mesure ou il est périodiquement nécessaire d'aiguiser la lame. En effet, si le couteau ne coupe plus bien, le fil n'est pas coupé proprement et peu à peu des fibres peuvent s'accumuler et empêcher le dispositif de fonctionner suite à un bourrage causé par cette accumulation.In application EP 925000015.0, the air jet is replaced by a pusher which applies the wire against a storage reel at the precise moment when the wire is cut at the junction of the two conduits. It appears that the synchronization of these two mechanical functions is difficult to guarantee and that offsets can occur over time. Therefore, there is a risk that the pusher arrives against the surface of the storage reel after the passage of the cut end of the wire. In this case, this end goes into the spinning pot and the spinning process is interrupted. Another drawback of this solution lies in the use of a knife for cutting the wire, since it is periodically necessary to sharpen the blade. In fact, if the knife no longer cuts well, the wire is not cut cleanly and little by little fibers can accumulate and prevent the device from functioning following a jam caused by this accumulation.

Le but de la présente invention est de remédier aux inconvénients susmentionnés.The object of the present invention is to remedy the aforementioned drawbacks.

A cet effet, cette invention a pour objets, tout d'abord un procédé de filage centrifuge destiné à produire un fil en continu selon la revendication 1, ainsi qu'un dispositif de filage centrifuge destiné à produire un fil en continu selon la revendication 2.To this end, the subject of this invention is, first of all, a centrifugal spinning process intended to produce a wire in according to claim 1, as well as a centrifugal spinning device intended to produce a continuous yarn according to claim 2.

Les avantages de l'invention sont évidents. Il n'y a plus de synchronisation à assurer entre l'organe de coupe et le poussoir chargé de retenir le fil en l'appliquant contre la bobine de stockage. Etant donné que c'est le pincement du fil qui crée les conditions d'une séparation du fil consécutivement à la perte de cohésion entre les fibres due à l'arrêt de la remontée de la torsion à partir du point de pincement du fil, le risque de laisser l'extrémité du fil partir dans le pot n'existe plus, puisque la condition même de la séparation du fil est le pincement préalable de celui-ci. Dès lors, cette séparation ne nécessite plus d'organe de coupe et une action pneumatique est suffisante pour séparer le fil au niveau de la jonction. Dès que l'extrémité ainsi libérée du fil sortant du train étireur entre dans le conduit menant à l'autre pot, elle entre dans un écoulement d'air hélicoïdal qui lui communique une prétorsion destinée à lui redonner une cohésion apte à atteindre l'autre pot de filage. C'est ce même écoulement d'air hélicoïdal qui crée la dépression aspirant le fil dans le conduit menant à l'autre pot de filage. Les risques de bourrage de l'organe de coupe, consécutif à l'usure de la lame, sont supprimés. On peut donc constater que la fiabilité du processus de filage se trouve considérablement améliorée par la présente invention et que cette amélioration résulte en outre d'une simplification du dispositif de filage allant dans le sens d'une réduction du coût de ce dispositif, ainsi que d'une réduction du coût de son entretien. Cette invention constitue donc un élément important, destiné à faire progresser la filature centrifuge dont les avantages potentiels sont considérables, puisqu'elle permet de produire à plus grande vitesse que le système anneau curseur un fil de qualité équivalente, voire supérieure.The advantages of the invention are obvious. There is no longer any synchronization to be ensured between the cutting member and the pusher responsible for retaining the wire by applying it against the storage reel. Since it is the pinching of the wire which creates the conditions for a separation of the wire following the loss of cohesion between the fibers due to the stopping of the ascent of the twist from the point of pinching of the wire, the risk of letting the end of the wire go into the pot no longer exists, since the very condition for the separation of the wire is the prior pinching of the latter. Consequently, this separation no longer requires a cutting member and a pneumatic action is sufficient to separate the wire at the junction. As soon as the end thus freed of the wire leaving the stretching train enters the conduit leading to the other pot, it enters a flow of helical air which communicates to it a pretortion intended to restore its cohesion capable of reaching the other spinning pot. It is this same helical air flow which creates the vacuum sucking the wire in the conduit leading to the other spinning pot. The risks of jamming of the cutting member, due to wear of the blade, are eliminated. It can therefore be seen that the reliability of the spinning process is considerably improved by the present invention and that this improvement also results from a simplification of the spinning device going in the direction of reducing the cost of this device, as well as a reduction in the cost of its maintenance. This invention therefore constitutes an important element, intended to advance centrifugal spinning, the potential advantages of which are considerable, since it makes it possible to produce at higher speed than the slider ring system a thread of equivalent or even higher quality.

Le dessin annexé illustre, schématiquement et à titre d'exemple une forme d'exécution d'un dispositif de filage pour la mise en oeuvre du procédé objet de la présente invention.The accompanying drawing illustrates schematically and by way of example an embodiment of a spinning device for implementing the method which is the subject of the present invention.

Les figures 1 à 4 sont quatre vues en élévation coupées du dispositif de filage illustrant quatre phases caractéristiques du processus de filage.Figures 1 to 4 are four sectional elevation views of the spinning device illustrating four characteristic phases of the spinning process.

Les figures du dessin montrent en détail les éléments qui ont trait directement à la présente invention. Pour ce qui concerne le fonctionnement, l'entraînement des bobines de stockage, le passage du fil des bobines de stockage à celle de bobinage, ainsi que la rattache des différentes longueurs de fil stockées sur les bobines de stockage lors de leur bobinage sur la bobine de bobinage, ces éléments n'ont pas été représentés ni décrits ici et on pourra se reporter pour plus de détails à ce sujet à la demande de brevet EP 92500015.0. Ce document montre en particulier la manipulation des longueurs de fil pour obtenir un fil continu enroulé sans interrupton sur une même bobine de bobinage qui est appelée à atteindre une taille standard.The figures in the drawing show in detail the elements which relate directly to the present invention. With regard to operation, the drive of the storage coils, the passage of the wire from the storage coils to that of winding, as well as the connection of the different lengths of wire stored on the storage coils during their winding on the reel of winding, these elements have not been shown or described here and reference may be made to patent application EP 92500015.0 for more details on this subject. This document shows in particular the manipulation of the lengths of wire to obtain a continuous wire wound without interruption on the same winding coil which is called to reach a standard size.

Le dispositif de filage objet de l'invention comporte un train étireur dont seule la sortie, sous la forme de deux rouleaux 1, 2 est représentée. Un conduit 3 est disposé pour recueillir le faisceau de fibres étiré 4 sortant du train étireur. Ce conduit 3 se divise en deux embranchements 5 et 6 dont les sorties sont alignées sur deux conduits 5', respectivement 6', qui aboutissent respectivement dans deux pots de filage centrifuges 7 et 8. Des mécanismes servant à répartir le fil le long des parois internes des pots ne sont pas représentés, mais peuvent être comme ceux illustrés et décrits dans le EP-A1-515.762.The spinning device which is the subject of the invention comprises a drawing train of which only the outlet, in the form of two rollers 1, 2 is shown. A conduit 3 is arranged to collect the drawn bundle of fibers 4 leaving the drawing train. This conduit 3 is divided into two branches 5 and 6, the outlets of which are aligned on two conduits 5 ′, respectively 6 ′, which terminate in two centrifugal spinning pots 7 and 8 respectively. Mechanisms serving to distribute the wire along the walls internal pots are not shown, but may be like those illustrated and described in EP-A1-515,762.

Deux bobines de stockage 9 et 10 sont disposées dans l'espace séparant les conduits 5 et 6 des conduits 5' et 6'. Vis-à-vis de chacune de ces bobines de stockage 9 et 10, de l'autre côté de la trajectoire du fil passant de la sortie des conduits 5, 6 à l'entrée des conduits 5', 6', se trouve un poussoir 11, 12 solidaire d'un piston 13, respectivement 14, monté dans un cylindre pneumatique 15, respectivement 16, à l'encontre de la pression d' un ressort de rappel 17, respectivement 18. Une bobine de bobinage 19 est destinée à recueillir le fil des bobines de stockage 9 et 10, par exemple, comme décrit dans le EP 925000015.0 susmentionné, cette partie de bobinage du fil n'étant pas nécessaire à la compréhension de la présente invention.Two storage coils 9 and 10 are arranged in the space separating the conduits 5 and 6 from the conduits 5 'and 6'. Opposite each of these storage coils 9 and 10, on the other side of the path of the wire passing from the outlet of the conduits 5, 6 to the inlet of the conduits 5 ', 6', is a plunger 11, 12 secured to a piston 13, respectively 14, mounted in a pneumatic cylinder 15, respectively 16, against the pressure of a return spring 17, respectively 18. A winding coil 19 is intended for collect the wire from the storage spools 9 and 10, for example, as described in the aforementioned EP 925000015.0, this part of winding the wire not being necessary for the understanding of the present invention.

Une série de buses 20 est répartie angulairement autour du conduit 3. Ces buses sont reliées sélectivement par l'intermédiaire d'un temporisateur 21 à une source d'air sous pression S. Ces buses 20 sont disposées de manière à créer, dans le conduit 3, un écoulement hélicoïdal d'air sous pression dirigé en aval. Deux autres séries de buses 22 et 23 sont disposées en aval dans chacun des embranchements 5 et 6. Elles sont reliées sélectivement à la source d'air sous pression S par le temporisateur 21 et une valve de commutation 24. Ces buses 22 et 23 sont également orientées pour former un écoulement d'air hélicoïdal dans les embranchements 5 et 6.A series of nozzles 20 is angularly distributed around the duct 3. These nozzles are selectively connected via a timer 21 to a source of pressurized air S. These nozzles 20 are arranged so as to create, in the duct 3, a helical flow of pressurized air directed downstream. Two other series of nozzles 22 and 23 are arranged downstream in each of the branches 5 and 6. They are selectively connected to the source of pressurized air S by the timer 21 and a switching valve 24. These nozzles 22 and 23 are also oriented to form a helical air flow in branches 5 and 6.

Deux buses supplémentaires 25 et 26 peuvent être dirigées dans l'axe du fil à la naissance de chaque embranchement 5 et 6 et situées dans le plan commun à ces deux embranchements. Ces buses 25 et 26 sont reliées sélectivement à la source d'air sous pression S par le temporisateur 21 et la valve de commutation 24.Two additional nozzles 25 and 26 can be directed in the axis of the wire at the birth of each branch 5 and 6 and located in the plane common to these two branches. These nozzles 25 and 26 are selectively connected to the source of pressurized air S by the timer 21 and the switching valve 24.

La source d'air sous pression S est encore reliée sélectivement, par l'intermédiaire du temporisateur 21 et de la valve de commutation 24, aux deux cylindres pneumatiques 15, 16, ainsi qu'à deux éjecteurs 27 et 28, situés le long des conduits 5' et 6', respectivement, pour créer une dépression à l'entrée de ces conduits.The source of pressurized air S is also selectively connected, via the timer 21 and the switching valve 24, to the two pneumatic cylinders 15, 16, as well as to two ejectors 27 and 28, located along the conduits 5 'and 6', respectively, to create a vacuum at the inlet of these conduits.

Comme on peut le constater, la valve de commutation 24 permet de commuter la source de pression S sur deux circuits distincts, A et B, le circuit A alimentant la série de buses 22, la buse 26, le cylindre pneumatique 16 et l'éjecteur 27, le circuit B alimentant la série de buses 23, la buse 25, le cylindre pneumatique 15 et l'éjecteur 28. La série de buses 20 est alimentée chaque fois que le temporisateur relie les circuits A ou B à la source d'air sous pression S.As can be seen, the switching valve 24 makes it possible to switch the pressure source S on two separate circuits, A and B, the circuit A supplying the series of nozzles 22, the nozzle 26, the pneumatic cylinder 16 and the ejector 27, circuit B supplying the series of nozzles 23, the nozzle 25, the pneumatic cylinder 15 and the ejector 28. The series of nozzles 20 is supplied each time the timer connects circuits A or B to the air source under pressure S.

Nous allons décrire maintenant les diverses étapes du procédé de filage, objet de l'invention, à l'aide des quatre figures du dessin.We will now describe the various steps of the spinning process, object of the invention, using the four figures of the drawing.

La figure 1 illustre une phase du cycle de filage au cours de laquelle le fil du pot de filage centrifuge 7 est transféré sur la bobine de stockage 9, alors que le fil est en cours de filage dans l'autre pot 8. Simultanément, le fil précédemment enroulé sur la bobine de stockage 10 est transféré sur la bobine de bobinage 19.FIG. 1 illustrates a phase of the spinning cycle during which the thread of the centrifugal spinning pot 7 is transferred to the storage reel 9, while the thread is in spinning in the other pot 8. Simultaneously, the wire previously wound on the storage reel 10 is transferred to the winding reel 19.

Au bout d'un temps déterminé, correspondant à un certain degré de remplissage du pot de filage 8, le temporisateur commute la valve de commutation 24 sur le circuit A susmentionné, qui est dessiné en trait fort sur la figure 2, qui illustre l'effet produit par cette mise sous pression du circuit A. Au moment où le circuit A est mis sous pression, le poussoir 12 pince le fil contre la bobine de stockage 10. Ce pincement du fil a pour effet d'isoler la partie du fil située entre le point de pincement et la sortie du train étireur 1, 2 de la source de torsion communiquée au fil par le pot de filage 8. Simultanément, les buses 20 communiquent une torsion à cette portion du fil. Comme en même temps les buses 22 exercent une dépression à l'entrée du conduit 5 et que la buse 26 peut projeter un jet d'air sous pression contre le fil celui-ci, ne présentant pratiquement plus de cohésion, se casse à l'endroit où il est sollicité par la dépression due aux buses 22 et par le jet de la buse 26. La bobine de stockage 10 entraînée en rotation dans le sens de la flèche enroule à la fois la portion de fil sortant du conduit 6 et le fil du pot 8. Quant à l'extrémité du faisceau de fibres sortant du train étireur 1, 2, il est immédiatement soumis à un effet de torsion par les buses 20, de sorte que ce faisceau de fibres retrouve une cohésion. Pour garantir la régularité de la torsion, la distance entre le point de pincement des rouleaux 1, 2 et les buses 20 est choisie inférieure à la longueur moyenne des fibres. Ensuite, à l'entrée de l'embranchement 5, le fil reçoit une torsion en S communiquée par les buses 22, ce qui lui donne une cohésion apte à atteindre le pot de filage 7.At the end of a determined time, corresponding to a certain degree of filling of the spinning pot 8, the timer switches the switching valve 24 to the aforementioned circuit A, which is drawn in strong lines in FIG. 2, which illustrates the effect produced by this pressurization of circuit A. When circuit A is pressurized, the pusher 12 pinches the wire against the storage coil 10. This pinching of the wire has the effect of isolating the part of the wire located between the pinch point and the exit of the drawing train 1, 2 from the source of torsion communicated to the wire by the spinning pot 8. Simultaneously, the nozzles 20 communicate a twist to this portion of the wire. As at the same time the nozzles 22 exert a vacuum at the inlet of the conduit 5 and that the nozzle 26 can project a jet of pressurized air against the wire the latter, having virtually no more cohesion, breaks with place where it is stressed by the depression due to the nozzles 22 and by the jet of the nozzle 26. The storage reel 10 driven in rotation in the direction of the arrow winds both the portion of wire leaving the conduit 6 and the wire of the pot 8. As for the end of the bundle of fibers leaving the stretching train 1, 2, it is immediately subjected to a torsional effect by the nozzles 20, so that this bundle of fibers regains cohesion. To guarantee the regularity of the twist, the distance between the pinch point of the rollers 1, 2 and the nozzles 20 is chosen to be less than the average length of the fibers. Then, at the entrance to the branch 5, the wire receives an S-shaped twist communicated by the nozzles 22, which gives it a cohesion capable of reaching the spinning pot 7.

Compte tenu de la vitesse de la machine en régime de "travail" et de la longueur réduite du faisceau de fibres dans le conduit (3), ces fibres ne devant pas être tordues aux fins d'en faciliter la séparation, le retard entre la buse (20) et les buses (22, 23) doit être de quelques fractions de seconde, ce qui n'est pas possible avec la "sensibilité" de la technologie du temporisateur; des moyens informatisés de contrôle sont préférables.Taking into account the speed of the machine in "working" mode and the reduced length of the bundle of fibers in the duct (3), these fibers should not be twisted in order to facilitate separation, the delay between the nozzle (20) and nozzles (22, 23) must be a few fractions of a second, which is not possible with the "sensitivity" of the technology the timer; computerized means of control are preferable.

Dès que le filage est amorcé dans le pot 7, la pression dans le circuit A est interrompue et on se trouve dans la situation illustrée par la figure 3.As soon as the spinning is started in the pot 7, the pressure in the circuit A is interrupted and we are in the situation illustrated by FIG. 3.

Une fois que le pot 8 est vidé, il y a à nouveau changement de pot de filage comme illustré par la figure 4. Il s'agit exactement de l'opération inverse de celle décrite en relation avec la figure 2, c'est-à-dire que c'est le circuit B susmentionné qui est mis sous pression, les opérations décrites pour la figure 2 se produisant exactement de la même manière mais en sens inverse, c'est-à-dire que le fil passe alors du pot de filage 7 au pot de filage 8.Once the pot 8 is emptied, there is again a change of spinning pot as illustrated in FIG. 4. This is exactly the reverse operation to that described in relation to FIG. 2, that is to say ie it is the above-mentioned circuit B which is pressurized, the operations described for FIG. 2 occurring exactly in the same way but in reverse, that is to say that the wire then passes from the pot 7 to spinning pot 8.

Ce cycle se répète ainsi de façon continue aussi longtemps que nécessaire.This cycle is thus repeated continuously for as long as necessary.

Claims (5)

Procédé de filage centrifuge destiné à produire en continu un fil de longueur indéfinie selon lequel on alimente alternativement deux pots de filage centrifuge (7,8) par deux conduits d'alimentation respectifs (5,5';6,6') prenant tous deux naissance à la sortie d'un train étireur (1,2), en séparant périodiquement le fil au niveau de la jonction des deux conduits, en communiquant une prétorsion au faisceau de fibres sortant du train étireur par un jet d'air hélicoïdal et en dirigeant cette extrémité dans l'autre desdits conduits, caractérisé en ce que, pour séparer périodiquement le fil, on le pince le long de sa trajectoire entre ladite jonction et le pot de filage (7,8) dans lequel il est amené, pour arrêter la remontée de la torsion le long du fil, au-delà de la zone de pincement, on induit simultanément une aspiration dans l'autre desdits conduits (5,6), en créant un écoulement d'air hélicoïdal en direction du pot de filage (7,8) qu'il est destiné à alimenter en fil, de sorte que la portion du fil située à la jonction des deux conduits, isolée de la source de torsion suite au pincement du fil, perd sa cohésion et se sépare du reste du fil sous l'effet de l'aspiration créée dans l'autre desdits conduits dans lequel l'écoulement d'air hélicoïdal le fait avancer en direction de l'autre pot de filage en le soumettant à une prétorsion, on arrête ledit écoulement hélicoïdal dès que le fil est entré en contact avec la face interne du pot de filage centrifuge et on répète cette opération en sens inverse, et ainsi de suite autant de fois que désiré.Centrifugal spinning process intended to continuously produce a wire of indefinite length according to which two centrifugal spinning pots (7,8) are alternately supplied by two respective supply conduits (5,5 '; 6,6') taking both birth at the exit of a stretching train (1,2), by periodically separating the wire at the junction of the two conduits, by communicating a pretortion to the bundle of fibers leaving the stretching train by a jet of helical air and by directing this end into the other of said conduits, characterized in that, to periodically separate the wire, it is clamped along its path between said junction and the spinning pot (7,8) into which it is brought, to stop the rise of the twist along the wire, beyond the pinch zone, a suction is induced simultaneously in the other of said conduits (5,6), creating a flow of helical air in the direction of the spinning pot (7,8) that it is intended for ali lie in wire, so that the portion of the wire located at the junction of the two conduits, isolated from the source of torsion following the pinching of the wire, loses its cohesion and separates from the rest of the wire under the effect of the suction created in the other of said conduits in which the helical air flow makes it advance towards the other spinning pot by subjecting it to a pretortion, said helical flow is stopped as soon as the wire has come into contact with the face internal of the centrifugal spinning pot and this operation is repeated in reverse, and so on as many times as desired. Dispositif de filage centrifuge comprenant deux pots de filage centrifuge (7,8) alimentés alternativement par un train étireur (1,2), deux conduits (5,5';6,6') aboutissant chacun à un desdits pots (7,8) et prenant naissance à un embranchement situé la sortie d'un conduit commun (3) dont l'entrée est adjacente à la sortie du train étireur (1,2), des moyens adjacents (22,23) audit embranchement pour séparer le fil en deux et le conduire dans l'autre desdits deux conduits, chacun de ces conduits étant en deux parties (5,5'; 6,6') alignées, séparées l'une de l'autre par un espace, dans l'intervalle duquel se trouve, d'un côté de la trajectoire du fil, une bobine (9,10) pour recevoir le fil produit dans le pot de filage auquel ce conduit aboutit, et, de l'autre côté de cette trajectoire, un poussoir (11,12) pour pincer le fil contre la surface de ladite bobine, caractérisé par le fait qu'il comporte des moyens pneumatiques (15,16;22,23) agencés pour actionner sensiblement simultanément ledit poussoir (11,12) situé vis-à-vis du fil en cours de filage et pour créer un écoulement d'air hélicoïdal dans la partie du conduit (5,6) s'étendant entre ledit embranchement et ledit espace, conduisant à l'autre pot de filage.Centrifugal spinning device comprising two centrifugal spinning pots (7,8) supplied alternately by a drawing train (1,2), two conduits (5,5 ';6,6') each leading to one of said pots (7,8 ) and arising from a branch located at the outlet of a common conduit (3) whose inlet is adjacent to the outlet of the drawing train (1,2), adjacent means (22,23) at said branch to separate the wire in two and lead it into the other of said two conduits, each of these conduits being in two parts (5.5 ';6.6') aligned, separated from each other by a space, in the interval of which there is, on one side of the path of the thread, a spool (9,10) to receive the thread produced in the spinning pot to which this conduit terminates, and, on the other side of this trajectory, a pusher (11,12) for pinching the wire against the surface of said coil, characterized in that it comprises pneumatic means (15,16; 22 , 23) arranged to actuate said pusher (11, 12) situated substantially simultaneously with the wire being spun and to create a helical air flow in the part of the duct (5,6) extending between said branch and said space, leading to the other spinning pot. Procédé selon la revendication 1, caractérisé en ce que simultanément à la création dudit écoulement d'air hélicoïdal dans l'autre desdits conduits, on dirige un jet d'air (25,26) contre le fil en amont de ce conduit et dans sa direction.Method according to claim 1, characterized in that simultaneously with the creation of said helical air flow in the other of said conduits, an air jet (25, 26) is directed against the wire upstream of this conduit and in its direction. Procédé selon la revendication 1, caractérisé par le fait que, à chacune des interventions de l'un ou l'autre des injecteurs (22,23), on actionne un injecteur (20) disposé dans le conduit (3) à la sortie du train d'étirage et agissant avec un retard prédéterminé par rapport aux précédents.Method according to claim 1, characterized in that, at each intervention of one or the other of the injectors (22,23), an injector (20) is actuated arranged in the conduit (3) at the outlet of the drawing train and acting with a predetermined delay compared to the previous ones. Procédé selon la revendication 1, caractérisé par le fait que, à la sortie du train d'étirage (1,2), on induit une torsion hélicoïdale grâce à la buse (20) et ainsi, dans les deux buses suivantes (22,23) des conduits (5,6), la torsion s'effectue dans le même sens que celui imposé par le pot de filage centrifuge.Method according to claim 1, characterized in that, at the exit from the drawing train (1,2), a helical torsion is induced by the nozzle (20) and thus, in the two following nozzles (22,23 ) of the conduits (5,6), the twisting takes place in the same direction as that imposed by the centrifugal spinning pot.
EP19930500149 1993-11-03 1993-11-03 Process for centrifugal spinning Expired - Lifetime EP0651078B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP19930500149 EP0651078B1 (en) 1993-11-03 1993-11-03 Process for centrifugal spinning
DE1993626615 DE69326615T2 (en) 1993-11-03 1993-11-03 Centrifugal spinning process
ES93500149T ES2139643T3 (en) 1993-11-03 1993-11-03 CENTRIFUGAL SPINNING PROCEDURE.
JP26981794A JP3326026B2 (en) 1993-11-03 1994-11-02 Centrifugal spinning method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19930500149 EP0651078B1 (en) 1993-11-03 1993-11-03 Process for centrifugal spinning

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EP0651078A1 true EP0651078A1 (en) 1995-05-03
EP0651078B1 EP0651078B1 (en) 1999-09-29

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ES (1) ES2139643T3 (en)

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WO2020232928A1 (en) * 2019-05-22 2020-11-26 江苏亿茂滤材有限公司 Centrifugal spinning apparatus and planar receiving-type centrifugal spinning automatic production device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0515762A1 (en) * 1991-05-22 1992-12-02 Carlos Pujol-Isern Process for centrifugal spinning
EP0556528A1 (en) * 1992-02-14 1993-08-25 Carlos Pujol-Isern Continuous centrifugal spinning method and spinning machine for carrying out the method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0515762A1 (en) * 1991-05-22 1992-12-02 Carlos Pujol-Isern Process for centrifugal spinning
EP0556528A1 (en) * 1992-02-14 1993-08-25 Carlos Pujol-Isern Continuous centrifugal spinning method and spinning machine for carrying out the method

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DE69326615T2 (en) 2000-07-06
JP3326026B2 (en) 2002-09-17
EP0651078B1 (en) 1999-09-29
ES2139643T3 (en) 2000-02-16
DE69326615D1 (en) 1999-11-04
JPH07189047A (en) 1995-07-25

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