EP0082794B1 - Device for the production of a fleece made of parallel yarns, and method for the production of various complex articles made with such a fleece - Google Patents

Device for the production of a fleece made of parallel yarns, and method for the production of various complex articles made with such a fleece Download PDF

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Publication number
EP0082794B1
EP0082794B1 EP82420178A EP82420178A EP0082794B1 EP 0082794 B1 EP0082794 B1 EP 0082794B1 EP 82420178 A EP82420178 A EP 82420178A EP 82420178 A EP82420178 A EP 82420178A EP 0082794 B1 EP0082794 B1 EP 0082794B1
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EP
European Patent Office
Prior art keywords
weft
pins
yarn
yarns
web
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Expired
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EP82420178A
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German (de)
French (fr)
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EP0082794A1 (en
Inventor
Jean Curinier
Philippe Pinet
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Fils dAuguste Chomarat et Cie SA
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Fils dAuguste Chomarat et Cie SA
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Priority to AT82420178T priority Critical patent/ATE13916T1/en
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/02—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments
    • D04H3/04—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments in rectilinear paths, e.g. crossing at right angles
    • D04H3/045—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of forming fleeces or layers, e.g. reorientation of yarns or filaments in rectilinear paths, e.g. crossing at right angles for net manufacturing
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/12—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with filaments or yarns secured together by chemical or thermo-activatable bonding agents, e.g. adhesives, applied or incorporated in liquid or solid form

Definitions

  • the present invention relates to an improved device for the formation of a sheet made up of parallel threads, spaced from each other, extending transversely with respect to the length of said sheet; it also relates to a process making it possible to produce complex articles directly, in particular non-woven textile grids, one of the constituents of which is formed by such a ply.
  • weft plies can also be used for the production of knitted articles produced according to the technique known as "weft frontal insertion", a technique which consists in incorporating over the entire width of the knitted fabric, during its manufacture, a weft thread in each row of stitches or according to a determined rhythm.
  • weft frontal insertion a technique which consists in incorporating over the entire width of the knitted fabric, during its manufacture, a weft thread in each row of stitches or according to a determined rhythm.
  • a well-known technique for producing such weft plies is described in particular in French patents 1 335418, 1 367 567 and 1 537 811.
  • a plurality of weft threads are distributed around spikes arranged on two endless chains (or belts) spaced from each other by a distance corresponding to the width of the sheet that is to be formed.
  • the weft yarn dispensing element is disposed above the two endless chains comprising the pins and is constituted by a rotating assembly which, during its rotation, deposits the wires between and around said pins.
  • Such a device is complex, in particular by the fact that it requires particular guide members for positioning the weft threads around the pins when it is desired to obtain sheets made up of threads that are strictly parallel to one another. Furthermore, maintaining the weft threads around the pins is fairly difficult to achieve, the threads being able to escape easily from the pins.
  • the wire distributing element is constituted by one or more endless belts distributing one or more wires by revolution around two lateral belts, spaced apart, on which pins are fixed as previously serving to hold the ends of the wires frame.
  • the maintenance of the weft threads around the pins is not perfectly guaranteed and the risks of escape are high.
  • US Patent 3,594,256 describes a solution in which one (or more) weft thread (s) are distributed by means of a rotary rotating arm which, with each revolution, passes in front of spaced pins intended to hold the thread.
  • the pins are not carried by belts but are mounted on a drum inside which they can be retracted to allow the escape of the complex formed. Again, the maintenance of the ends of the weft son is not perfectly assured and, moreover, the wefts are not spaced regularly from each other.
  • the present invention overcomes the drawbacks of the prior techniques.
  • the device according to the invention aims to solve the problem of maintaining the ends of the weft threads in the devices according to which the weft ply is produced by distribution around pins supported by two endless belts. It also makes it possible to solve the problem of maintaining the parallelism between two consecutive frames and especially of a regular and constant spacing between said frames.
  • the device according to the invention makes it possible to solve these problems.
  • said thread during the removal if, for example, a single weft thread is distributed, said thread will be deposited on one of the sides, straight for example, so as to pass under two spikes while on the other side, left in this case, it will be distributed so as to pass under four spikes.
  • the invention therefore relates to a device allowing the production of weft plies made up of parallel threads spaced from each other.
  • This device is of the type comprising on the one hand, distribution elements (1) of at least one weft thread (2) and, on the other hand, positioning, holding and advancing elements on the web of weft yarn made, in the form of two continuous endless bands (3-4) preferably parallel, spaced from each other by a distance equal to the width of the web that is desired forming and which are controlled in synchronism with the distribution means (1) of the weft threads (2).
  • the positioning elements (3-4) consist of two endless belts driven by an intermediary of two pulleys (5-6) carried by a single driven shaft (7) by a motor (8) associated with a speed variator (9) making it possible to adjust the synchronism between the advance of the elements (3-4) and the movement of the distribution member (1).
  • the two belts (3-4) are of the same length and additional tensioning elements can be provided to guide them and / or keep them under tension.
  • the distribution means (1) are constituted by a rotary fin inside which passes the weft thread to be distributed but, of course, any other equivalent means could be used, for example of the type constituted by an endless belt or a rotating crown fitted with thread guide elements. Since such distribution elements are well known to technicians, they will not be described in detail in the following description. Similarly, when several weft threads are distributed simultaneously, it is avoided tooth that the supply of said weft thread to the distribution means will be carried out so as to prevent the threads from becoming tangled. These means being also well known, they will not be described in detail.
  • pins designated by the general reference P, will be arranged laterally on the endless elements (3-4) and project beyond the surface of the pulleys (11-12).
  • the weft thread (2) is supported on the outer faces of the support pulleys (11-12), so that the length of the support rope on one pulleys, (11) for example, twice as large as that on the other pulley (12).
  • This is obtained, in a simple manner, by using two pulleys (11-12) having different diameters, the pulley (12) being in this case half the size of the pulley (11).
  • the removal is carried out as follows.
  • the deposition process will be described for the distribution of a single weft thread, the invention however being applicable in the case where it is desired to distribute a plurality of threads one after the other.
  • the wire is deposited at the front of the pin P1. Due to the continuous advance of the belts (3-4) and the rotation of the distributor element 1, when this element arrives at point B (see Figure 3), the wire (2) is then deposited behind the pin P4.
  • the wire therefore surrounds four pins at each passage of the distribution element.
  • the wire is distributed on the pulley (12) around only two pins taking into account the fact that this pulley (12) has a diameter twice as small as the pulley (11).
  • the removal is carried out on the side of the pulley (12) first behind the pin P4 then in front of the picol P3
  • the thread is deposited in front of the needle P3 then, at point B, at the rear of the pin P6 and, on the side of the pulley (12) first of all at the rear of the pin P6 then at the front of the pin P5.
  • a weft web is obtained having the texture illustrated in FIG. 5.
  • the pins P are irregularly spaced from one another, as shown in FIG. 6.
  • the spacing E1 between the pin P1 and the pin P2 is equal to the desired distance D between two frames reduced by once the thickness d of the pins, while between the pin P2 and the pin P3, the distance E2 between each pin is equal to the desired distance D between two frames increased by one time the thickness of said pins. It is easily understood that thanks to such a distribution, a strictly constant spacing is obtained between each of the frames.
  • FIG. 7 is the representation of a weft ply obtained in accordance with the invention by distributing eight weft yarns. In such a case, the eight wires are distributed regularly over 180 ° of revolution.
  • the pins will be, at regular intervals, more or less spaced by a distance equal to the thickness of a spike depending on whether two consecutive wefts are arranged in opposite directions.
  • FIG. 7 explains by itself the way in which a weft ply obtained in accordance with the invention is made up by the distribution of eight elementary wires.
  • the proportions have not been respected, the central part being greatly reduced and the lateral parts being, on the contrary, enlarged to better show how the different wires are positioned one relative to the other.
  • FIG. 8 illustrates a complete installation, seen from the side, making it possible to continuously manufacture non-woven textile grids, the weft ply formed being associated with warp plies.
  • Such an installation comprises, upstream of the distribution means (1) of tramp wires (not shown), an assembly for the storage of food reels.
  • This assembly is constituted, for example, by an assembly rotating in synchronism with distribution means (1), conventional assembly which will not be described in detail and which supports the food reels (not shown for simplification) -
  • the means do distribution (1) deposit the weft threads on lateral elements of positioning, advancing and holding wires of the type described above and which are illustrated in FIG. 1. After removing the weft threads, two layers of warp (22-23), an upper one (22), the another lower (23) are brought on either side of the weft web formed.
  • the assembly passes through a gluing system (24) so that a binding material is deposited on the warp and weft threads.
  • the grid formed then passes over a drying drum (25) and then over return elements to be returned at (26).
  • the drum dryer (25) is preferably arranged above the conveyor elements. This allows, as shown schematically in Figure 9, to obtain an automatic and easy escape from the ends of the frame loops. Indeed, due to the presence of the lower warp ply (23), the weft threads are raised when the grid surrounds the drum (25) and the lateral belts (3) and (4) are twisted, which allows the exhaust of the ends.
  • such an embodiment is not limiting and other means making it possible to cause the ends of the weft threads to escape.
  • selvedge threads could possibly be incorporated into the invention of weft loops. It could also be considered to cut the ends.
  • Such an installation can be used not only to make non-woven textile grids, but could be associated with paper machines, knitting looms ...

Abstract

Device for producing a weft web constituted of parallel spaced apart yarns. According to the invention, the yarns are distributed around two continuous endless belts advantageously parallel and supporting a number of pins. The weft yarns are distributed in such a way that the feeding end of the distributing elements describes by its rotation a plane which cuts through the pulleys supporting the lateral yarn-positioning, securing and advancing means; the pins provided on said lateral means being fixed laterally and the weft yarn, when deposited, resting on the outer faces of the supporting pulleys.

Description

La présente invention concerne un dispositif perfectionné pour la formation d'une nappe constituée de fils parallèles, espacés les uns des autres, s'étendant transversalement par rapport à la longueur de ladite nappe; elle a trait également à un procédé permettant de réaliser directement des article complexes, notamment des grilles textiles non tissées, dont l'un des constituants est formé par une telle nappe.The present invention relates to an improved device for the formation of a sheet made up of parallel threads, spaced from each other, extending transversely with respect to the length of said sheet; it also relates to a process making it possible to produce complex articles directly, in particular non-woven textile grids, one of the constituents of which is formed by such a ply.

Dans la suite de la description, une telle nappe sera désignée par l'expression »nappe de trame« et les fils la constituant par l'expression »fils de trame«.In the following description, such a ply will be designated by the expression "weft ply" and the yarns constituting it by the expression "weft son".

De très nombreux dispositifs ont été proposés à ce jour pour réaliser des nappes de trame qui sont destinées à être associées à des fils parallèles longitudinaux (fils de chaîne), de manière à former des articles couramment désignés par l'expression »grille textile non tissée«. Dans ces articles, les fils de la nappe de trame et ceux de la (ou des) nappe(s) de chaîne sont réunis entre eux non pas par des entrecroisement comme dans un tissu classique, mais par solidarisation des fils à leur point de superposition, par exemple par collage, soudure...Many devices have been proposed to date for making weft plies which are intended to be associated with longitudinal parallel threads (warp threads), so as to form articles commonly designated by the expression "non-woven textile grid ". In these articles, the threads of the weft ply and those of the warp (s) are joined together not by interlacing as in a conventional fabric, but by joining the threads at their point of superposition , for example by gluing, welding ...

Par ailleurs, de telle nappes de trames peuvent également être utilisées pour la réalisation d'articles tricotés réalisés selon la technique dite »à insertion frontale de trame«, technique qui consiste à incorporer sur toute la largeur du tricot, lors de sa fabrication, un fil de trame dans chaque rangée de mailles ou selon un rythme déterminé.Furthermore, such weft plies can also be used for the production of knitted articles produced according to the technique known as "weft frontal insertion", a technique which consists in incorporating over the entire width of the knitted fabric, during its manufacture, a weft thread in each row of stitches or according to a determined rhythm.

Une technique bien connue pour la réalisation de telles nappes de trame est décrite notamment dans les brevets français 1 335418, 1 367 567 et 1 537 811. D'une manière générale, selon cette technique, on distribue une pluralité de fils de trame autour de picots disposés sur deux chaînes sans fin (ou courroies) espacées l'une de l'autre d'une distance correspondante à la largeur de la nappe que l'on désire former. Selon cette technique, l'élément distributeur de fil de trame est disposé au-dessus des deux chaînes sans fin comportant les picots et est constitué par un ensemble tournant qui, lors de sa rotation, dépose les fils entre et autour desdits picots.A well-known technique for producing such weft plies is described in particular in French patents 1 335418, 1 367 567 and 1 537 811. In general, according to this technique, a plurality of weft threads are distributed around spikes arranged on two endless chains (or belts) spaced from each other by a distance corresponding to the width of the sheet that is to be formed. According to this technique, the weft yarn dispensing element is disposed above the two endless chains comprising the pins and is constituted by a rotating assembly which, during its rotation, deposits the wires between and around said pins.

Un tel dispositif est complexe, notamment par le fait qu'il nécessite des organes de guidage particuliers pour positionner les fils de trame autour des picots lorsque l'on désire obtenir des nappes constituées de fils rigoureusement parallèles entre eux. Par ailleurs, le maintien des fils de trame autour des picots est assez délicat à réaliser, les fils pouvant s'échapper facilement des picots.Such a device is complex, in particular by the fact that it requires particular guide members for positioning the weft threads around the pins when it is desired to obtain sheets made up of threads that are strictly parallel to one another. Furthermore, maintaining the weft threads around the pins is fairly difficult to achieve, the threads being able to escape easily from the pins.

Des solutions comparables sont également décrites dans le brevet des Etats-Unis d'Améri- que n° 3 340 584 et le brevet français 2 270 185.Comparable solutions are also described in United States Patent No. 3,340,584 and French Patent 2,270,185.

Selon ces documents, l'élément distributeur de fil est constitué par une ou plusieurs courroies sans fin distribuant un ou plusieurs fils par révolution autour de deux courroies latérales, espacées, sur lesquelles sont fixés comme précédemment des picots servant à maintenir les extrémités des fils de trame. Comme pour les brevets cités précédemment, le maintien des fils de trame autour des picots n'est pas assuré de manière parfaite et les risques d'échappement sont élevés.According to these documents, the wire distributing element is constituted by one or more endless belts distributing one or more wires by revolution around two lateral belts, spaced apart, on which pins are fixed as previously serving to hold the ends of the wires frame. As with the aforementioned patents, the maintenance of the weft threads around the pins is not perfectly guaranteed and the risks of escape are high.

Le brevet des Etats-Unis d'Amérique 3 594 256 décrit une solution dans laquelle un (ou plusieurs) fil(s) de trame sont distribués au moyen d'un bras tournant rotatif qui, à chaque révolution, passe devant des picots espacés destinés à maintenir le fil. Cependant, les picots ne sont pas portés par des courroies mais sont montés sur un tambour à l'intérieur duquel ils peuvent être escamotés pour permettre l'échappement du complexe formé. Là aussi, le maintien des extrémités des fils de trame n'est pas assuré de manière parfaite et, de plus, les trames ne sont pas espacées régulièrement des unes des autres.US Patent 3,594,256 describes a solution in which one (or more) weft thread (s) are distributed by means of a rotary rotating arm which, with each revolution, passes in front of spaced pins intended to hold the thread. However, the pins are not carried by belts but are mounted on a drum inside which they can be retracted to allow the escape of the complex formed. Again, the maintenance of the ends of the weft son is not perfectly assured and, moreover, the wefts are not spaced regularly from each other.

La présente invention permet de surmonter les inconvénients des techniques antérieures. D'une manière générale, le dispositif conforme à l'invention vise à résoudre le problème du maintien des extrémités des fils de trame dans les dispositifs selon lesquels la nappe de trame est réalisée par distribution autour de picots portés par deux courroies sans fin. Elle permet également de résoudre le problème du maintien du parallélisme entre deux trames consécutives et surtout d'un écartement régulier et constant entre lesdites trames.The present invention overcomes the drawbacks of the prior techniques. In general, the device according to the invention aims to solve the problem of maintaining the ends of the weft threads in the devices according to which the weft ply is produced by distribution around pins supported by two endless belts. It also makes it possible to solve the problem of maintaining the parallelism between two consecutive frames and especially of a regular and constant spacing between said frames.

Le problème du maintien des extrémités des boucles de trame avait été antérieurement posé et résolu par le brevet français 2 419 992. Si la solution décrite dans ce document donne satisfaction lorsque le dépôt des fils de trame est réalisé par intermittence, il convient cependant de noter qu'une telle solution présente encore un certain nombre d'inconvénients. Tous d'abord, il est difficilement envisageable de l'appliquer aux techniques selon lesquelles les fils de trame sont distribués d'un mouvement continu. Par ailleurs, l'avance des courroies latérales étant réalisée par intermittence, la vitesse de production s'en trouve diminuée et surtout, il ne peut pas être envisagé d'associer un tel dispositif à une installation travaillant en continu telle que par exemple une machine papetière.The problem of maintaining the ends of the weft loops was previously posed and resolved by French patent 2,419,992. If the solution described in this document is satisfactory when the deposition of the weft threads is carried out intermittently, it should however be noted that such a solution still has a number of drawbacks. First of all, it is difficult to envisage applying it to the techniques according to which the weft threads are distributed in a continuous movement. Furthermore, the advance of the lateral belts being carried out intermittently, the production speed is thereby reduced and above all, it cannot be envisaged to associate such a device with an installation working continuously such as for example a machine. paper mill.

Le dispositif conforme à l'invention permet de résoudre ces problèmes.The device according to the invention makes it possible to solve these problems.

D'une manière générale, l'invention concerne donc un dispositif pour la réalisation de nappes de trame constituées de fils parallèles espacés les uns des autres, dispositif du type comportant:

  • - des éléments de distribution d'au moins un fil de trame provenant d'une source d'alimentation fixe ou synchronisée avec lesdits éléments de distribution, ces éléments étant animés d'un mouvement continu, des éléments de positionnement, de main tien et d'avance de ladite nappe de fils de trame ainsi réalisée se présentant sous la forme de deux bandes sans fin continues, avantageusement parallèles, espacées l'une de l'autre d'une distance égale à la largeur de la nappe que l'on désire former et qui sont commandées en synchronisme avec les moyens de distribution du fil de trame lesdites bandes supportant des picots P autour desquels sont distribués les fils de trame.
In general, the invention therefore relates to a device for producing weft plies made up of parallel threads spaced apart from each other, device of the type comprising:
  • distribution elements of at least one weft thread coming from a fixed or synchronized power source with said distribution elements, these elements being driven by a continuous movement, positioning, holding and advancing elements of said weft son ply thus produced in the form of two continuous endless bands, advantageously parallel, spaced from one another by a distance equal to the width of the ply which it is desired to form and which are controlled in synchronism with the means for distributing the weft thread, said strips supporting pins P around which the weft threads are distributed.

Le dispositif selon l'invention se caractérisé par le fait:

  • - que l'extrémité de sortie de l'élément distributeur de fil de trame décrit, lors de sa révolution, un plan sécant des poulies supportant les éléments latéraux de positionnement, d'avance et de maintien des fils de trame,
  • - que les picots autour desquels sont distribués lesdits fils de trame sont fixés latéralement sur les éléments sans fin de positionnement, de maintien et d'avance,
  • - que lors de la dépose entre les picots, le fil de trame prend appui sur les surfaces extérieures des poulies support des éléments latéraux, la longueur de la corde d'appui sur ces poulies étant deux fois plus grande d'un côté que de l'autre.
The device according to the invention is characterized by the fact:
  • the outlet end of the weft yarn distributor element describes, during its revolution, a plane intersecting pulleys supporting the lateral elements for positioning, advancing and holding the weft yarns,
  • - that the pins around which said weft threads are distributed are fixed laterally on the endless positioning, holding and advancing elements,
  • - that when depositing between the pins, the weft thread is supported on the outer surfaces of the pulleys supporting the lateral elements, the length of the supporting rope on these pulleys being twice greater on one side than on the 'other.

En d'autres termes, conformément à l'invention, lors de la dépose si, par exemple, on distribue un seul fil de trame, ledit fil sera déposé sur l'un des côtés, droit par exemple, de manière à passer sous deux picots alors que sur l'autre côté, gauche dans ce cas, il sera distribué de manière à passer sous quatre picots.In other words, in accordance with the invention, during the removal if, for example, a single weft thread is distributed, said thread will be deposited on one of the sides, straight for example, so as to pass under two spikes while on the other side, left in this case, it will be distributed so as to pass under four spikes.

Dans une forme préférentielle de mise en oeuvre de l'invention, le dispositif présente également les caractéristiques additionnelles suivantes:

  • - l'espacement entre les picots n'est pas identique sur toute la longueur des éléments de positionnement, de maintien et d'avance, mais est réalisé de telle sorte que si un fil est distribué, un espacement est égal à la distance souhaitée entre deux trames consécutives, l'espacement suivant étant réduit d'une distance égale à une fois l'épaisseur des picots.
In a preferred embodiment of the invention, the device also has the following additional characteristics:
  • - the spacing between the pins is not identical over the entire length of the positioning, holding and advancing elements, but is made so that if a wire is distributed, a spacing is equal to the desired distance between two consecutive frames, the following spacing being reduced by a distance equal to once the thickness of the pins.

L'invention et les avantages qu'elle apporte seront cependant mieux compris grâce à la description qui suit et qui est illustrée par les schémas annexés dans lesquels:

  • - la figure 1 est une vue schématique en perspective d'un dispositif conforme à l'invention permettant la formation d'une nappe de trame par districution d'un fil de trame,
  • - les figures 2 et 3 illustrent plus en détail, également en perspective, la dépose d'un fil de trame entre les picots de l'un des éléments laté- rau× de positionnement, d'avance ot de maintien des fils de trame,
  • - la figure 4 et la figure 5 sont des vues détaillées, montrant de manière plus précise la structure d'une nappe de trame réalisée conformément à l'invention et plus particulièrement le positionnement desdites trames latéralement autour des picots de maintien,
  • - la figure 6 est une vue agrandie montrant la variation dans l'espacement entre les picots de manière à obtenir des trames régulièrement espacées les unes des autres,
  • - la figure 7 est un diagramme volontairement déformé, montrant une nappe de trame réalisée conformément à l'invention par distribution de huit fils de trame par révolution de l'organe distributeur,
  • - la figure 8 est une représentation schématique d'une installation complète conforme à l'invention pour la réalisation d'une grille textile non tissée,
  • - la figure 9 est une vue schématique illustrant un moyen pour provoquer l'échappement de la nappe de trame formée des picots de positionnement et de maintien.
The invention and the advantages which it brings will however be better understood thanks to the description which follows and which is illustrated by the appended diagrams in which:
  • FIG. 1 is a schematic perspective view of a device according to the invention allowing the formation of a weft ply by districution of a weft yarn,
  • FIGS. 2 and 3 illustrate in more detail, also in perspective, the removal of a weft thread between the pins of one of the lateral × positioning elements, in advance or holding the weft threads,
  • FIG. 4 and FIG. 5 are detailed views showing more precisely the structure of a weft ply produced in accordance with the invention and more particularly the positioning of said wefts laterally around the holding pins,
  • FIG. 6 is an enlarged view showing the variation in the spacing between the pins so as to obtain frames regularly spaced from one another,
  • FIG. 7 is a deliberately deformed diagram showing a weft ply produced in accordance with the invention by distributing eight weft yarns per revolution of the distributor member,
  • FIG. 8 is a schematic representation of a complete installation according to the invention for producing a non-woven textile grid,
  • - Figure 9 is a schematic view illustrating a means for causing the escape of the weft ply formed by positioning and holding pins.

Si l'on se reporte aux schémas annexés, l'invention concerne donc un dispositif permettant la réalisation de nappes de trame constituées de fils parallèles espacés les uns des autres.If reference is made to the appended diagrams, the invention therefore relates to a device allowing the production of weft plies made up of parallel threads spaced from each other.

Ce dispositif est du type comportant d'une part, des éléments de distribution (1) d'au moins un fil de trame (2) et, d'autre part, des éléments de positionnement, de maintien et d'avance sur la nappe de fils de trame réalisée, se présentant sous la forme de deux bandes sans fin continues (3-4) de préférence parallèles, espacées l'une de l'autre d'une distance égale à la largeur de la nappe que l'on désire former et qui sont commandées en synchronisme avec les moyens de distribution (1) des fils de trame (2). Dans la forme de réalisation illustrée par la figure 1, les éléments de positionnement (3-4) sont constitués de deux courroies sans fin entraînées par un intermédiaire de deux poulies (5-6) portées par un arbre de commande unique (7) entraîné par un moteur (8) associé à un variateur de vitesse (9) permettant de régler le synchronisme entre l'avance des éléments (3-4) et le déplacement de l'organe de distribution (1). En pratique, les deux courroies (3-4) sont de même longueur et des éléments tendeurs additionnels peuvent être prévus pour assurer leur guidage et/ou les maintenir sous tension.This device is of the type comprising on the one hand, distribution elements (1) of at least one weft thread (2) and, on the other hand, positioning, holding and advancing elements on the web of weft yarn made, in the form of two continuous endless bands (3-4) preferably parallel, spaced from each other by a distance equal to the width of the web that is desired forming and which are controlled in synchronism with the distribution means (1) of the weft threads (2). In the embodiment illustrated in Figure 1, the positioning elements (3-4) consist of two endless belts driven by an intermediary of two pulleys (5-6) carried by a single driven shaft (7) by a motor (8) associated with a speed variator (9) making it possible to adjust the synchronism between the advance of the elements (3-4) and the movement of the distribution member (1). In practice, the two belts (3-4) are of the same length and additional tensioning elements can be provided to guide them and / or keep them under tension.

Dans le cas présent, les moyens de distribution (1) sont constitués par une ailette rotative à l'intérieur de laquelle passe le fil de trame à distribuer mais, bien entendu, tout autre moyen équivalent pourrait être utilisé, par exemple du type constitué par une courroie sans fin ou une couronne rotative munie d'éléments guide-fils. Etant donné que de tels éléments de distributa- tion sont bien connus des techniciens, ils ne seront pas décrits en détail dans la suite de la description. De même, lorsque plusieurs fils de trame sont distribués simultanément, il est évident que l'amenée dudit fil de trame au moyen de distribution sera réalisée de manière à éviter que les fils ne s'emmêlent. Ces moyens étant également bien connus, ils ne seront pas décrits en détail.In the present case, the distribution means (1) are constituted by a rotary fin inside which passes the weft thread to be distributed but, of course, any other equivalent means could be used, for example of the type constituted by an endless belt or a rotating crown fitted with thread guide elements. Since such distribution elements are well known to technicians, they will not be described in detail in the following description. Similarly, when several weft threads are distributed simultaneously, it is avoided tooth that the supply of said weft thread to the distribution means will be carried out so as to prevent the threads from becoming tangled. These means being also well known, they will not be described in detail.

Conformément à l'invention, afin d'assurer un maintien parfait des extrémités des trames autour des picots ainsi qu'un écartement constant entre deux trames successives, le dispositif conforme à l'invention présente les caractéristiques suivantes:

  • Tout d'abord, l'extrémité de sortie (10) de l'élément distributeur (1) de fils de trame (2) décrit, lors de sa révolution, un plan sécant des poulies (11-12) supportant les courroies (3-4).
In accordance with the invention, in order to ensure perfect retention of the ends of the frames around the pins as well as a constant spacing between two successive frames, the device according to the invention has the following characteristics:
  • First of all, the outlet end (10) of the weft yarn distributor (1) (2) describes, during its revolution, a plane intersecting pulleys (11-12) supporting the belts (3 -4).

Par ailleurs, les picots, désignés par la référence générale P, seront disposés latéralement sur les éléments sans fin (3-4) et débordent à l'extérieur de la surface des poulies (11-12).Furthermore, the pins, designated by the general reference P, will be arranged laterally on the endless elements (3-4) and project beyond the surface of the pulleys (11-12).

Enfin, lors de la dépose entre les picots, le fil de trame (2) prend appui sur les faces extérieures des poulies support (11-12) et ce, de telle sorte que la longueur de la corde d'appui sur l'une des poulies, (11) par exemple, soit deux fois plus grande que celle sur l'autre poulie (12). Cela est obtenu, de manière simple, en utilisant deux poulies (11-12) ayant des diamètres différents, la poulie (12) étant dans le cas présent deux fois plus petite que la poulie (11 ).Finally, when depositing between the pins, the weft thread (2) is supported on the outer faces of the support pulleys (11-12), so that the length of the support rope on one pulleys, (11) for example, twice as large as that on the other pulley (12). This is obtained, in a simple manner, by using two pulleys (11-12) having different diameters, the pulley (12) being in this case half the size of the pulley (11).

Grâce à un tel système de dépose, le maintien des fils de trame est parfaitement assuré, compte-tenu du fait qu'après passage entre les picots P, le fil prend appui sur la surface des courroies (3-4) et entoure lesdits picots P de la manière illustrée plus en détail aux figures 2, 3 et 4.Thanks to such a removal system, the weft threads are maintained perfectly, taking into account that after passing between the pins P, the thread bears on the surface of the belts (3-4) and surrounds said pins P as illustrated in more detail in Figures 2, 3 and 4.

Afin d'obtenir un parallélisme parfait entre les fils de trame ainsi qu'un écartement constant sur toute la longueur de la nappe formée, la dépose est réalisée de la manière suivante. Par mesure de simplification, le processus de la dépose sera décrit pour la distribution d'un seul fil de trame, l'invention étant cependant applicable au cas où l'on désire distribuer une pluralité de fils les uns à la suite des autres.In order to obtain perfect parallelism between the weft threads as well as a constant spacing over the entire length of the sheet formed, the removal is carried out as follows. By way of simplification, the deposition process will be described for the distribution of a single weft thread, the invention however being applicable in the case where it is desired to distribute a plurality of threads one after the other.

Ce processus de dépôt tel qu'il ressort clairement des figures 2,3,4 et 5 est le suivant.This deposition process as clearly shown in Figures 2,3,4 and 5 is as follows.

Si l'on considère que le point de départ est constitué par la position A de la figure 2, le fil est déposé à l'avant du picot P1. Du fait de l'avance continue des courroies (3-4) et de la rotation de l'élément distributeur 1, lorsque cet élément arrive au point B (voir figure 3), le fil (2) est alors déposé en arrière du picot P4.If we consider that the starting point is constituted by position A in FIG. 2, the wire is deposited at the front of the pin P1. Due to the continuous advance of the belts (3-4) and the rotation of the distributor element 1, when this element arrives at point B (see Figure 3), the wire (2) is then deposited behind the pin P4.

Sur la poulie (11), le fil entoure donc quatre picots à chaque passage de l'élément de distribution.On the pulley (11), the wire therefore surrounds four pins at each passage of the distribution element.

En revanche, du côté droit, le fil est distribué sur la poulie (12) autour seulement de deux picots compte-tenu du fait que cette poulie (12) a un diamètre deux fois plus petit que la poulie (11). La dépose s'effectue du côté de la poulie (12) tout d'ahord derrière le picot P4 puis devant la picol P3On the other hand, on the right side, the wire is distributed on the pulley (12) around only two pins taking into account the fact that this pulley (12) has a diameter twice as small as the pulley (11). The removal is carried out on the side of the pulley (12) first behind the pin P4 then in front of the picol P3

Au tour suivant, au point A, le fil est deposé devant l'aiguille P3 puis, au point B, à l'arrière du picot P6 et, du côté de la poulie (12) tout d'abord à l'arrière du picot P6 puis à l'avant du picot P5.In the next round, at point A, the thread is deposited in front of the needle P3 then, at point B, at the rear of the pin P6 and, on the side of the pulley (12) first of all at the rear of the pin P6 then at the front of the pin P5.

On obtient une nappe de trame ayant la contexture illustrée à la figure 5.A weft web is obtained having the texture illustrated in FIG. 5.

Afin d'obtenir un espacement régulier et constant entre chacune des trames déposées, les picots P sont irrégulièrement espacés les uns des autres, tel que cela est représenté à la figure 6.In order to obtain a regular and constant spacing between each of the deposited frames, the pins P are irregularly spaced from one another, as shown in FIG. 6.

Dans le cas où une seule trame est déposée, l'espacement E1 entre le picot P1 et le picot P2 est égal à la distance D souhaitée entre deux trames diminuée d'une fois l'épaisseur d des picots, alors qu'entre le picot P2 et le picot P3, la distance E2 entre chaque picot est égale à la distance D souhaitée entre deux trames augmentée d'une fois l'épaisseur desdits picots. On conçoit très aisément que grâce à une telle répartition, on obtient un écartement rigoureusement constant entre chacune des trames.In the case where a single frame is deposited, the spacing E1 between the pin P1 and the pin P2 is equal to the desired distance D between two frames reduced by once the thickness d of the pins, while between the pin P2 and the pin P3, the distance E2 between each pin is equal to the desired distance D between two frames increased by one time the thickness of said pins. It is easily understood that thanks to such a distribution, a strictly constant spacing is obtained between each of the frames.

Par ailleurs, il convient de noter qu'un tel dispositif peut être utilié pour distribuer, pour chaque rotation de l'organe distributeur, plus d'une trame à la fois. Cela est clairement montré par le schéma de la figure 7 qui est la représentation d'une nappe de trame obtenue conformément à l'invention en distribuant huit fils de trame. Dans un tel cas, les huit fils sont répartis régulièrement sur 180° de révolution.Furthermore, it should be noted that such a device can be used to distribute, for each rotation of the dispensing member, more than one frame at a time. This is clearly shown by the diagram in FIG. 7 which is the representation of a weft ply obtained in accordance with the invention by distributing eight weft yarns. In such a case, the eight wires are distributed regularly over 180 ° of revolution.

Tout comme dans le cas de la distribution d'un seul fil afin d'obtenir un espacement rigoureusement constant entre deux trames consécutives, les picots seront, à intervalles réguliers, plus ou moins espacés d'une distance égale à l'épaisseur d'un picot selon que deux trames consécutives sont disposées de manière opposée.As in the case of the distribution of a single wire in order to obtain a rigorously constant spacing between two consecutive wefts, the pins will be, at regular intervals, more or less spaced by a distance equal to the thickness of a spike depending on whether two consecutive wefts are arranged in opposite directions.

La figure 7 explicite par elle-même la manière dont est constituée une nappe de trame obtenue conformément à l'invention par distribution de huit fils élémentaires. Bien entendu, sur cette figure 7, les proportions n'ont pas été respectées, la partie centrale étant fortement réduite et les parties latérales étant au contraire agrandies pour mieux montrer comment sont positionnés les différents fils les une par rapport aux autres.FIG. 7 explains by itself the way in which a weft ply obtained in accordance with the invention is made up by the distribution of eight elementary wires. Of course, in this FIG. 7, the proportions have not been respected, the central part being greatly reduced and the lateral parts being, on the contrary, enlarged to better show how the different wires are positioned one relative to the other.

Le dispositif conforme à l'invention permet également de réaliser des articles complexes divers comportant une telle nappe de trame. La figure 8 illustre une installation complète, vue de côté, permettant de fabriquer à la continue des grilles textiles non tissées, la nappe de trame formée étant associée a des nappes de chaine.The device according to the invention also makes it possible to produce various complex articles comprising such a weft ply. FIG. 8 illustrates a complete installation, seen from the side, making it possible to continuously manufacture non-woven textile grids, the weft ply formed being associated with warp plies.

Une telle installation comprend, en amont des moyens de distribution (1) de fils de trampe (non représentés), un ensemble pour le stockage des bobines alimentaires. Cet ensemble est constitué, par exemple, par un ensemble tournant en synchronisme avec des moyens de distribution (1), ensemble conventionnel qui ne sera pas décrit en détail et qui supporte les bobines alimentaires (non représentées par mesure de simplification)- Les moyens do distribution (1) déposent les fils de trame sur des éléments latéraux de positionnement, d'avance et de maintien des fils du type de ceux décrits précédemment et qui sont illustrés par la figure 1. Après dépose des fils de trame, deux nappes de chaine (22-23), une supérieure (22), l'autre inférieure (23) sont amenées de part et d'autre de la nappe de trame formée. L'ensemble passe dans un système d'encollage (24) afin qu'une matière liante soit déposée sur les fils de chaine et de trame. La grille formée passe ensuite sur un tambour sécheur (25) puis, sur des éléments de renvoi pour être renvidés en (26). Dans une telle installation, le tamboursécheur (25) est de préférence disposé au-dessus des éléments transporteurs. Cela permet, ainsi que la montre schématiquement la figure 9, d'obtenir un échappement automatique et aisé des extrémités des boucles de trame. En effet, du fait de la présence de la nappe de chaine inférieure (23), les fils de trame sont soulevés lorsque la grille entoure le tambour (25) et les courroies latérales (3) et (4) sont vrillées, ce qui permet l'échappement des extrémités. Bien entendu, un tel mode de réalisation n'est pas limitatif et d'autres moyens permettant de provoquer l'échappement des extrémités des fils de trame pourraient être utilisés. Ainsi, il pourrait être envisagé d'avoir deux courroies latérales (3-4) légèrement convergentes. De même des fils de lisière pourraient éventuellement être incorporés à l'invention des boucles de trame. Il pourrait être également envisagé de couper les extrémités.Such an installation comprises, upstream of the distribution means (1) of tramp wires (not shown), an assembly for the storage of food reels. This assembly is constituted, for example, by an assembly rotating in synchronism with distribution means (1), conventional assembly which will not be described in detail and which supports the food reels (not shown for simplification) - The means do distribution (1) deposit the weft threads on lateral elements of positioning, advancing and holding wires of the type described above and which are illustrated in FIG. 1. After removing the weft threads, two layers of warp (22-23), an upper one (22), the another lower (23) are brought on either side of the weft web formed. The assembly passes through a gluing system (24) so that a binding material is deposited on the warp and weft threads. The grid formed then passes over a drying drum (25) and then over return elements to be returned at (26). In such an installation, the drum dryer (25) is preferably arranged above the conveyor elements. This allows, as shown schematically in Figure 9, to obtain an automatic and easy escape from the ends of the frame loops. Indeed, due to the presence of the lower warp ply (23), the weft threads are raised when the grid surrounds the drum (25) and the lateral belts (3) and (4) are twisted, which allows the exhaust of the ends. Of course, such an embodiment is not limiting and other means making it possible to cause the ends of the weft threads to escape. Thus, it could be envisaged to have two lateral belts (3-4) slightly convergent. Similarly selvedge threads could possibly be incorporated into the invention of weft loops. It could also be considered to cut the ends.

Les exemples qui précèdent montrent bien les avantages apportés par l'invention et notamment le fait que lors de la réalisation de la nappe de trame, on obtient un maintien parfait des extrémités des boucles formées ainsi qu'un paral- lèlisme et un écartement constant entre chaque trame.The foregoing examples clearly show the advantages provided by the invention and in particular the fact that during the production of the weft ply, the ends of the loops formed are perfectly maintained as well as parallelism and constant spacing between each frame.

Une telle installation peut être utilisée non seulement pour réaliser des grilles textiles non tissées, mais pourrait être associée à des machines papetières, des métiers à tricoter...Such an installation can be used not only to make non-woven textile grids, but could be associated with paper machines, knitting looms ...

Claims (3)

1. Device for producing a weft web constituted of parallel spaced apart yarns, of the type comprising:
- means (1) to distribute at least one weft yarn (2), from a supply source which is either fixed or synchronized with the said distribution means (1), which means (1) are moving continously;
- means for positioning, securing and advancing the resulting weft web, which means are in the form of two continuous endless belts (3, 4), advantageously parallel, and separated one form the other by a distance equal to the width of the desired web, said belts being controlled in synchronism with the means (1) distributing the weft yarn (2), and said belts (3,4) supporting pins P around which are distributed the weft yarn,

characterized by the fact:
- that the feeding end (10) of the means (1) distributing the weft yarn (2) describes by its rotation, a plane which cuts through the pulleys (11, 12), supporting the lateral yarns positioning, securing and advancing means (3, 4),
- that the pins P around which are distributed the weft yarns (2) are secured laterally on the endless means (3,4),
- that the weft yarn (2) when deposited between the pins P, rests on the outer faces of the pulleys (11, 12) supporting said lateral means, the length of yarn bearing on said pulleys being twice as long on one side (1), as on the other (12).
2. Device as claimed in claim 1, characterized by the fact that the intervals between the pins P are not the same over the whole length of the yarn-positioning, securing and advancing means (3, 4), but they are such that if one yarn is distributed, one interval is equal to the distance desired between two consecutive wefts, the next interval being reduced by as much as once the thickness of the pins.
3. Process for producing a complex article comprising a weft web obtained by way of a device such as claimed in claim 1 and 2 characterized by the fact that after depositing the weft yarns on the lateral elements (3, 4) two warp webs (22, 23), an upper one (22) and a lower one (23), are brought on either side of the formed weft web, the whole assembly being thereafter passed through a bonding system (24) and through a drying drum (25), the lower warp web (23) causing the automatic release of the ends of the weft loops from the said pins P.
EP82420178A 1981-12-23 1982-12-14 Device for the production of a fleece made of parallel yarns, and method for the production of various complex articles made with such a fleece Expired EP0082794B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82420178T ATE13916T1 (en) 1981-12-23 1982-12-14 DEVICE FOR MANUFACTURING A FLEECE FORMED OF PARALLEL THREADS AND METHOD FOR MANUFACTURING VARIOUS COMPOSITE PRODUCTS INCLUDING SUCH FLEECE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8124347A FR2518595A1 (en) 1981-12-23 1981-12-23 DEVICE FOR THE PRODUCTION OF A TABLE OF PARALLEL THREADS AND VARIOUS COMPLEX ARTICLES COMPRISING SUCH A TABLET
FR8124347 1981-12-23

Publications (2)

Publication Number Publication Date
EP0082794A1 EP0082794A1 (en) 1983-06-29
EP0082794B1 true EP0082794B1 (en) 1985-06-19

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EP82420178A Expired EP0082794B1 (en) 1981-12-23 1982-12-14 Device for the production of a fleece made of parallel yarns, and method for the production of various complex articles made with such a fleece

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US (1) US4472234A (en)
EP (1) EP0082794B1 (en)
JP (1) JPS58120851A (en)
AT (1) ATE13916T1 (en)
CA (1) CA1194282A (en)
DE (1) DE3264335D1 (en)
ES (1) ES8401542A1 (en)
FR (1) FR2518595A1 (en)
IE (1) IE53749B1 (en)

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JP2602221B2 (en) * 1986-06-30 1997-04-23 ト−ヨ−衛材株式会社 Method of stretching and attaching thread-like or belt-like elastic body in sheet width direction
US7169246B2 (en) * 2001-06-28 2007-01-30 Liba Maschinefabrik Gmbh Process and device for the placement and fixing of a sheet of filaments for the production of scrims
FR3023303B1 (en) * 2014-07-02 2019-04-26 Porcher Industries METHOD FOR MANUFACTURING TEXTILE GRID AND INSTALLATION AND MATERIALS RELATING THERETO

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Publication number Priority date Publication date Assignee Title
NL284252A (en) * 1961-10-12
FR1367567A (en) * 1962-06-26 1964-07-24 Glanzstoff Ag Device for making a textile canvas with wide cross-threaded mesh
US3340584A (en) * 1965-06-17 1967-09-12 Johnson & Johnson Apparatus for cross-laying fibrous material
DE1635691A1 (en) * 1966-07-14 1971-03-11 Glanzstoff Ag Process for the production of material webs reinforced with wide-meshed textile surface structures made from intersecting threads
CH480944A (en) * 1967-04-22 1969-11-15 Schuller Gmbh Glaswerk Method and device for producing a fabric consisting of longitudinal and transverse threads, in particular for increasing the tensile strength of mats and fleeces made of staple glass fibers
US3675285A (en) * 1967-07-10 1972-07-11 Union Carbide Corp Apparatus for changing mesh size of non-woven netting
SU487487A3 (en) * 1969-03-13 1975-10-05 В.Шлафгорст Унд Ко (Фирма) Apparatus for laying weft threads on the warp
US3756893A (en) * 1969-04-03 1973-09-04 Owens Corning Fiberglass Corp Nonwoven structure and method and apparatus for producing it
NL7009948A (en) * 1970-07-06 1972-01-10 Textiel Unie
FR2270185A1 (en) * 1974-05-10 1975-12-05 Socerem Conceptions Const Meca Weft-forming mechanism - for adhesive bonded mesh structures
US3953989A (en) * 1974-08-21 1976-05-04 Veb Wirkmaschinenbau Method and apparatus for warp knitting and resultant product
US4068357A (en) * 1976-12-27 1978-01-17 Mcdonnell Douglas Corporation Method and apparatus for fabricating open weave scrim cloth
FR2419991A1 (en) * 1978-03-14 1979-10-12 Pelletier Jacques DEVICE FOR FORMING A TABLE OF PARALLEL WIRES

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Publication number Publication date
ATE13916T1 (en) 1985-07-15
DE3264335D1 (en) 1985-07-25
JPS58120851A (en) 1983-07-18
IE822996L (en) 1983-06-23
EP0082794A1 (en) 1983-06-29
ES518449A0 (en) 1983-12-16
IE53749B1 (en) 1989-02-01
FR2518595B1 (en) 1984-01-27
FR2518595A1 (en) 1983-06-24
CA1194282A (en) 1985-10-01
US4472234A (en) 1984-09-18
ES8401542A1 (en) 1983-12-16

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