EP0156739A1 - Device for manufacturing a spun yarn - Google Patents

Device for manufacturing a spun yarn Download PDF

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Publication number
EP0156739A1
EP0156739A1 EP85420016A EP85420016A EP0156739A1 EP 0156739 A1 EP0156739 A1 EP 0156739A1 EP 85420016 A EP85420016 A EP 85420016A EP 85420016 A EP85420016 A EP 85420016A EP 0156739 A1 EP0156739 A1 EP 0156739A1
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EP
European Patent Office
Prior art keywords
rotor
yarn
spindle
false twist
twist
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP85420016A
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German (de)
French (fr)
Inventor
Jean Louis Faure
Marcel Schoumacher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dite Asa Sa SA Ste
Asa SA
Original Assignee
Dite Asa Sa SA Ste
Asa SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dite Asa Sa SA Ste, Asa SA filed Critical Dite Asa Sa SA Ste
Publication of EP0156739A1 publication Critical patent/EP0156739A1/en
Withdrawn legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
    • D01H4/04—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques imparting twist by contact of fibres with a running surface
    • D01H4/08—Rotor spinning, i.e. the running surface being provided by a rotor

Definitions

  • L d ptésente invention relates to a device ll'optention of a fiber ffilé.
  • the yarn is obtained directly from a fiber ribbon by means of an assembly (breaker and rotor) which provides the three essential functions necessary for obtaining a yarn of fibers, namely the stretching-refining of the ribbon, the parallelization of the fibers and the twisting.
  • Such a rotor (also called a turbine) is in the form of a hollow enclosure, having substantially the shape of two truncated cones joined by their large bases and which is driven in rotation at high speed.
  • the fibers of the food tape are distributed inside this rotor by means of a breaker.
  • the fibers are pressed by centrifugal force inside the rotor and form a ring which is extracted in the form of a yarn whose twist is given by the rotor itself.
  • the extraction of the spun yarn can be done both by a pipe arranged in the axis of the rotor as by the very axis of drive of said rotor, this axis being of course, in this case, hollow.
  • the technique described in this patent is characterized by the use of a specially shaped rotary chamber, playing the role of the rotor, this chamber serving to parallelize the fibers under the effect of centrifugal force and to transport them, by passing through a fixed groove, to a twisting element constituted by a false twist pin.
  • Such a device is, as said previously, relatively difficult to implement and, moreover, the twisting member which it comprises does not make it possible to precisely control the fibers.
  • the device according to the invention is of the type according to which a false twist spindle is disposed at the outlet of the rotor, this spindle communicating to the yarn an additional twist in the same direction as that given by the rotor and is characterized by the fact that the false twist pin used allows not only to give this additional twist to the yarn but also exerts a tensile force propelling the yarn.
  • a spindle with crossed belts is preferably used.
  • the rate of additional false twist communicated to the yarn may vary, but preferably this rate is set to ur. high level.
  • the yarn obtained comprises, at its periphery, a layer of fibers which are twisted in the opposite direction to the twist imparted by the spindle and the rotor.

Abstract

The device uses what is known as the method "with freed fibres". In this method, the fibres fed from a roving (3) are distributed inside a rotor (5) by means of a taker-in (4) and are held by the centrifugal force against the inner surface of the said rotor (5) so as to form a spun yarn. This yarn is drawn out through a doffing tube (6) on the axis of the said rotor. In this process, a false twist is given to the spun yarn at the output from the rotor (5). The false twist is produced by a spindle (8) separated from the rotor (5). The spindle gives a further twist in the same direction as that given by the rotor. <IMAGE>

Description

Ld ptésente invention concerne un dispositif permettant ll'optention d'un ffilé de fibres.L d ptésente invention relates to a device ll'optention of a fiber ffilé.

Elle a trait plus particulièrement a un penection- nement apporté à la technique de filature désignée par l'expression "technique open-end".It relates more particularly to a penetration brought to the spinning technique designated by the expression "open-end technique".

D'une manière générale, selon cette technique open-end, le filé est obtenu directement à partir d'un ruban de fibres au moyen d'un ensemble (briseur et rotor) qui assure les trois fonctions essentielles nécessaires à l'obtention d'un filé de fibres, à savoir l'étirage- affinage du ruban, la parallélisation des fibres et le tordage.In general, according to this open-end technique, the yarn is obtained directly from a fiber ribbon by means of an assembly (breaker and rotor) which provides the three essential functions necessary for obtaining a yarn of fibers, namely the stretching-refining of the ribbon, the parallelization of the fibers and the twisting.

Un tel rotor (dénommé également turbine) se présente sous la forme d'une enceinte creuse, ayant sensiblement la forme de deux troncs de cône accolés par leurs grandes bases et qui est entraîné en rotation à grande vitesse. Les fibres du ruban alimentaire sont distribuées à l'intérieur de ce rotor au moyen d'un briseur. Les fibres sont plaquées par la force centrifuge à l'intérieur du rotor et forment un anneau qui est extrait sous la forme d'un filé dont la torsion est donnée par le rotor lui- même. L'extraction du filé peut se faire aussi bien par un conduil disposé dans l'axe du rotor que par l'axe même d'entraînement dudit rotor, cet axe étant bien entendu, dar.s ce cas, creux.Such a rotor (also called a turbine) is in the form of a hollow enclosure, having substantially the shape of two truncated cones joined by their large bases and which is driven in rotation at high speed. The fibers of the food tape are distributed inside this rotor by means of a breaker. The fibers are pressed by centrifugal force inside the rotor and form a ring which is extracted in the form of a yarn whose twist is given by the rotor itself. The extraction of the spun yarn can be done both by a pipe arranged in the axis of the rotor as by the very axis of drive of said rotor, this axis being of course, in this case, hollow.

Bien que cette technique soit très largement répandue à ce jour, elle présente encore un certain nombre d'inconvénients parmi lesquels on peut citer :

  • - une vitesse de production du filé qui, actuellement, plafonne et semble difficilement pouvoir être augmentée de manière simple ;
  • - le fait qu'il est pratiquement impossible de travailler des fibres de longueurs différentes et/ou variables.
Although this technique is very widely used to date, it still has a certain number of drawbacks among which we can cite:
  • - a speed of production of the yarn which, currently, levels off and seems difficult to be able to be increased in a simple manner;
  • - the fact that it is practically impossible to work with fibers of different and / or variable lengths.

Diverses solutions ont été proposées pour surmonter ces inconvénients mais il convient de noter, qu'à ce jour, aucune n'a trouvé un véritable développement industriel.Various solutions have been proposed to overcome these drawbacks, but it should be noted that, to date, none has found real industrial development.

Parmi ces solutions, celle faisant l'objet de la demande de brevet français n° 2 360 695 au nom du Demandeur permet, dans une certaine mesure, de résoudre ces problèmes mais présente, comme inconvénient de conduire un ensemble relativement complexe, délicat à mettre en oeuvre.Among these solutions, that which is the subject of French patent application no. 2 360 695 in the name of the Applicant allows, to a certain extent, to solve these problems but has the disadvantage of driving a relatively complex assembly, delicate to put in action.

D'une manière générale, la technique décrite dans ce brevet se caractérise par l'utilisation d'une chambre rotative de forme particulière, jouant le rôle du rotor, cette chambre servant à paralléliser les fibres sous l'effet de la force centrifuge et à les transporter, par passage dans une rainure fixe, jusqu'à un élément tordeur constitué par une broche de fausse torsion.In general, the technique described in this patent is characterized by the use of a specially shaped rotary chamber, playing the role of the rotor, this chamber serving to parallelize the fibers under the effect of centrifugal force and to transport them, by passing through a fixed groove, to a twisting element constituted by a false twist pin.

Un tel dispositif est, comme dit précédemment, relativement délicat à mettre en oeuvre et, par ailleurs, l'organe tordeur qu'il comporte ne permet pas de contrôler avec précision les fibres.Such a device is, as said previously, relatively difficult to implement and, moreover, the twisting member which it comprises does not make it possible to precisely control the fibers.

Antérieurement à cette solution, il avait été proposé dans le FR-A-1 546 714 d'adapter un dispositif de fausse torsion particulier à la sortie de la turbine (chambre rotative). Selon ce document, il est proposé d'utiliser à la place d'une broche de fausse torsion rotative un ensemble fixe comportant un fil métallique rigide, lisse autour duquel le fil passe en hélice.Prior to this solution, it had been proposed in FR-A-1 546 714 to adapt a particular false twist device at the outlet of the turbine (rotary chamber). According to this document, it is proposed to use in place of a rotary false twist spindle a fixed assembly comprising a rigid, smooth metallic wire around which the wire passes helically.

Si un tel dispositif permet d'augmenter le taux de torsion communiqué au fil, il ne permet cependant pas d'envisager d'augmenter les vitesses de renvidage et par suite la productivité.If such a device makes it possible to increase the rate of twist communicated to the thread, it does not however make it possible to envisage increasing the winding speeds and consequently the productivity.

Plus récemment, ainsi que cela ressort de l'article paru dans la revue "Industrie Textile - n° 1131 Mars 1983 pages 229 et 230", il a été proposé d'augmenter (doubler ) la production des installations de filature "open-End" en montant en série plusreurs chambres de ffilage. De telles selutions conduisent à des ensembles complexes et ne correspondent pas véritablement à une augmentation de la vitesse de production.More recently, as appears from the article published in the journal "Textile Industry - No. 1131 March 1983 pages 229 and 230", it has been proposed to increase (double) the production of "open-end" spinning installations by mounting several threading chambers in series. Such solutions lead to complex assemblies and do not really correspond to an increase in the speed of production.

Or, on a trouvé, et c'est ce qui fait l'objet de la présente invention, un perfectionnement au dispositif faisant appel au procédé selon lequel une torsion additionnelle est communiquée au fil à la sortie du rotor qui surmonte les inconvénients des solutions antérieures et qui autorise une augmentation des vitesses de production pour une viltesse donnée du rotor tout en conservant de bonnes qualités textiles au fll formé. Ce dispositif résulte d'une combinaison simple d'un rotor et d''une broche de fausse torsion conventionnels utilisés industriellement aussi bien pour la filature "open-end" que pour la texturation.However, we have found, and this is what is the subject of the present invention, an improvement to the device using the method according to which an additional twist is imparted to the wire at the outlet of the rotor which overcomes the drawbacks of previous solutions and which allows an increase in production speeds for a given speed of the rotor while retaining good textile qualities in the yarn formed. This device results from a simple combination of a rotor and a conventional false twist spindle used industrially as well for "open-end " spinning as for texturing.

D'une manière générale, le dispositif selon l'invention est du type selon lequel une broche de fausse torsion est disposée à la sortie du rotor, cette broche communiquant au filé une torsion additionnelle dans le même sens que celle donnée par le rotor et se caractérise par le fait que la broche de fausse torsion utilisée permet, non seulement de donner cette torsion additionnelle au filé mais également exerce une force de traction propulsant le filé.In general, the device according to the invention is of the type according to which a false twist spindle is disposed at the outlet of the rotor, this spindle communicating to the yarn an additional twist in the same direction as that given by the rotor and is characterized by the fact that the false twist pin used allows not only to give this additional twist to the yarn but also exerts a tensile force propelling the yarn.

Comme type de broche, on utilisera de préférence une broche à courroies croisées.As the type of spindle, a spindle with crossed belts is preferably used.

Le taux de fausse torsion additionnelle communiquée au filé peut varier mais, de préférence, ce taux est réglé à ur. niveau élevé.The rate of additional false twist communicated to the yarn may vary, but preferably this rate is set to ur. high level.

On a constaté, qu'en procédant de la manière précitée, il étail possible de doubler pratiquement les vitesses du délivreur d'appel du filé, délivreur disposé avant le système de renvidage et ce, sans nuire aux qualités textiles du filé formé. De plus, dans certains cas, en fonction de la torsion additionnelle communiquée, il est également possible d'obtenir un filé présentant une structure particulière par rapport au filé open-end conventionnel. En effet, notamment dans le cas où l'on utilise une forte torsion additionnelle, le filé obtenu comporte, à sa periphérie, une couche de fibres qui sont tordues en sens inverse de la torsion communiquée par la broche et le rotor.It has been found that, by proceeding in the aforementioned manner, it is possible to practically double the speeds of the yarn call deliverer, deliverer disposed before the winding system and this, without harming the textile qualities of the yarn formed. In addition, in some case, depending on the additional twist communicated, it is also possible to obtain a yarn having a particular structure compared to conventional open-end yarn. Indeed, especially in the case where a strong additional twist is used, the yarn obtained comprises, at its periphery, a layer of fibers which are twisted in the opposite direction to the twist imparted by the spindle and the rotor.

Une telle solution, particulièrement simple, n'était cependant pas évidente pour un homme du métier, cela étant prouvé, non seulement par les résultats inattendus qu'elle permet d'obtenlr auamentation de la vitesse de renvldage sans modification qe la vitesse du rotor et sans détérioration des propriétés du fil) mais également par le fait que, malgré les enseignements du brevet français 1 546 714, depuis cette date, les techniciens avaient envisagé des solutions totalement différentes.Such a particularly simple solution was not, however, obvious to a person skilled in the art, this being proved, not only by the unexpected results that it makes it possible to obtain a reduction in the speed of rewinding without modifying the speed of the rotor and without deterioration of the properties of the wire) but also by the fact that, despite the teachings of French patent 1,546,714, since that date, the technicians had considered completely different solutions.

L'invention et les avantages qu'elle apporte seront cependant mieux compris grâce à l'exemple de réalisation donné ri-apres à titre indicatif mais non limitatif et qui est illustré par le schéma unique annexé qui représente une installation comportant un dispositif selon l'invention.The invention and the advantages which it brings will however be better understood thanks to the embodiment given ri-apres by way of indication but not limitation and which is illustrated by the single appended diagram which represents an installation comprising a device according to the invention.

Cette installation présente :

  • - une alimentation en fibres constituée, par exemple, par un pot (1) ;
  • - un système d'appel (2) du ruban (3) contenu dans le pot ;
  • - un briseur rotatif (4) conventionnel destiné à paralléliser les fibres individuelles du ruban (3) ;
  • - un rotor (5), conventionnel, entraîné en rotation et à l'intérieur duquel sont projetées les fibres délivrées par le briseur (4) ;
  • - un conduit (6) disposé dans l'axe du rotor (5) et ptr mettant d'extraire le filé (7) dans ledit rotor ;
  • - une broche de fausse torsion (8), du type à courroies croisées, permettant de communiquer une torsion additionnelle du filé formé, tersion de même sens que celle communiquée dans le rotor (5) : cette broche (8) exerce également une traction sur le filé et tend à le propulser ;
  • - un délivreur d'appel (9) permettant d'amener le filé (10) au système de renvidage conventionnel (11).
This installation presents:
  • - a fiber supply consisting, for example, of a pot (1);
  • - a call system (2) for the ribbon (3) contained in the pot;
  • - a conventional rotary breaker (4) intended to parallelize the individual fibers of the ribbon (3);
  • - a rotor (5), conventional, driven in rotation and inside which are projected the fibers delivered by the breaker (4);
  • - A conduit (6) disposed in the axis of the rotor (5) and ptr putting to extract the yarn (7) in said rotor;
  • - a false twist spindle (8), of the type with crossed belts, making it possible to communicate an additional twist of the spun yarn, turning in the same direction as that communicated in the rotor (5): this spindle (8) also exerts traction on spun and tends to propel it;
  • - a call deliverer (9) allowing the yarn (10) to be brought to the conventional winding system (11).

Exemple :Example:

  • Sur une installation du type précité, on réaliser un filé de fibres à partir d'un ruban (3) en coton peigné pesant trois grammes par mètre.On an installation of the aforementioned type, a yarn of fibers is made from a combed cotton ribbon (3) weighing three grams per meter.

Les conditions opératoires sont les suivantes :

  • - vitesse d'alimentation en (2) : 0,864 m/mn ;
  • - vitesse de relation de la turbine (5) : 11 000t/mn,
  • - vitesse d'appel du délivreur (9) : 50 m/mn ;
  • - brocne de fausse torsion (8) : réglée de manière à communiquer une torsion additionnelle au filé d'environ 800 t/m.
The operating conditions are as follows:
  • - feed speed in (2): 0.864 m / min;
  • - relationship speed of the turbine (5): 11,000 rpm,
  • - calling speed of the deliverer (9): 50 m / min;
  • - false twist spit (8): adjusted so as to impart an additional twist to the yarn of approximately 800 rpm.

En travaillant dans les conditions précitées, on obtient un filé ayant un titre de 500 décitex, ledit filé étant utilisable en tissaqe, par exemple. A titre comparatif, si l'on travaille de manière conventionnelle sur l'installation du type précité, c'est-à-dire sans faire passer le filé à l'intérieur de la broche de fausse torsion (8), on a constaté que pour obtenir un produit ayant des caractéristiques comparables, il était impératif d'avoir une vitesse d'appel au plus égale à 20 m/mn.By working under the aforementioned conditions, a yarn having a count of 500 decitex is obtained, said yarn being usable in weaving, for example. For comparison, if one works in a conventional manner on the installation of the aforementioned type, that is to say without passing the yarn inside the false twist spindle (8), it has been found that to obtain a product with comparable characteristics, it was imperative to have a call speed at most equal to 20 m / min.

L'exemple qui précède montre bien les avantages apportés par l'invention et notamment le fait que pour une vitesse de rotor donnée, il est possible pratiquement de doubler la production et ce, sans pratiquement nuire aux qualités du filé formé.The above example clearly shows the advantages provided by the invention and in particular the fact that for a given rotor speed, it is practically possible to double production, without practically damaging the qualities of the yarn formed.

Dans l'exemple précédent, les vitesses de production peuvent paraître faibles mais il convient de noter que cet exempled a evé réalisé sur une macrare experrmen- tale et que, bien entendu, les vitesses de production pourialent étre notablement plus élevées en fonction du materiel utilisé.In the previous example, the production speeds may seem slow but it should be noted that this example was produced on an experimental macrare and that, of course, the production speeds could be significantly higher depending on the material used.

bien entendu, l'invention n'est pas limltée à l'exemple de réalisation décrit précédemment mais elle en couvre toutes les variantes réalisées dans le même esprit.of course, the invention is not limited to the embodiment described above, but it covers all the variants produced in the same spirit.

Claims (2)

1/ Dispositif pour l'obtention d'un filé de fibres selon la technique qite "à fabres libérées" selon laquelle les fibres provenant d'un ruban alimentaire (3) sont distribuées a l'mtémur d'un rotor (5) au moyen d'un briseur (4) et sont plaguées par la force centrifuge à l'intérieur dudit rotor (5) de manière à former un filé qui est extrait par un conduit (6) disposé dans l'axe dudit rotor, cette installation comportant également à la sortie du rotor (5) une broche de fausse torsion (8) qui communique une tcrsion additionnelle dans le même sens que celle donnés par le rotor, torsion qui remonte à l'intérneur dudit rotor (5). caractérisé par le fait que ladite broche de fausse torsion (8) est constituée par une broche qui exerce également une force de traction sur le filé et tend à le propulser.1 / Device for obtaining a yarn of fibers according to the qite "free-flowing" technique according to which the fibers coming from a food ribbon (3) are distributed to the wall of a rotor (5) by means of a breaker (4) and are plagued by centrifugal force inside said rotor (5) so as to form a yarn which is extracted by a conduit (6) disposed in the axis of said rotor, this installation also comprising at the outlet of the rotor (5) a false twist pin (8) which communicates an additional tension in the same direction as that given by the rotor, a twist which goes up to the interior of said rotor (5). characterized in that said false twist spindle (8) consists of a spindle which also exerts a tensile force on the yarn and tends to propel it. 2/ Installation selon la revendication 1, caractérisée par le fait que la broche de fausse torsion (8) est une broche à courrores croisées.2 / Installation according to claim 1, characterized in that the false twist spindle (8) is a spindle with crossed belts.
EP85420016A 1984-02-24 1985-01-29 Device for manufacturing a spun yarn Withdrawn EP0156739A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8403085 1984-02-24
FR8403085A FR2560228A1 (en) 1984-02-24 1984-02-24 DEVICE FOR OBTAINING A FIBER FILE

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EP0156739A1 true EP0156739A1 (en) 1985-10-02

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EP85420016A Withdrawn EP0156739A1 (en) 1984-02-24 1985-01-29 Device for manufacturing a spun yarn

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FR (1) FR2560228A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0275986A1 (en) * 1987-01-20 1988-07-27 E.I. Du Pont De Nemours And Company Combined carpet yarns by open end rotor spinning
EP0279434A1 (en) * 1987-02-20 1988-08-24 W. SCHLAFHORST AG &amp; CO. Method and apparatus for improving a yarn produced in the rotor of an open-end spinning machine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1548095A (en) * 1966-12-23 1968-11-29
FR2273094A1 (en) * 1974-05-30 1975-12-26 Fehrer Ernst
FR2360695A1 (en) * 1976-08-04 1978-03-03 Asa Sa Open=end spinning device having rotating cup - feeding parallel fibres centrifugally along stationary channel to twist bush

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1548095A (en) * 1966-12-23 1968-11-29
FR2273094A1 (en) * 1974-05-30 1975-12-26 Fehrer Ernst
FR2360695A1 (en) * 1976-08-04 1978-03-03 Asa Sa Open=end spinning device having rotating cup - feeding parallel fibres centrifugally along stationary channel to twist bush

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0275986A1 (en) * 1987-01-20 1988-07-27 E.I. Du Pont De Nemours And Company Combined carpet yarns by open end rotor spinning
EP0279434A1 (en) * 1987-02-20 1988-08-24 W. SCHLAFHORST AG &amp; CO. Method and apparatus for improving a yarn produced in the rotor of an open-end spinning machine

Also Published As

Publication number Publication date
FR2560228A1 (en) 1985-08-30

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