EP0277871B1 - Drafting apparatus for webs of textile fibres - Google Patents

Drafting apparatus for webs of textile fibres Download PDF

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Publication number
EP0277871B1
EP0277871B1 EP19880400164 EP88400164A EP0277871B1 EP 0277871 B1 EP0277871 B1 EP 0277871B1 EP 19880400164 EP19880400164 EP 19880400164 EP 88400164 A EP88400164 A EP 88400164A EP 0277871 B1 EP0277871 B1 EP 0277871B1
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EP
European Patent Office
Prior art keywords
needles
needle
implanted
straight
slanting
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Expired - Lifetime
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EP19880400164
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German (de)
French (fr)
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EP0277871A1 (en
Inventor
Henri Genevray
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N Schlumberger SAS
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N Schlumberger SAS
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/02—Gill boxes or other drafting machines employing fallers or like pinned bars
    • D01H5/12—Details
    • D01H5/14—Pinned bars

Definitions

  • the present invention relates to the drawing of textile fiber ribbons.
  • Document DE-C-156.223 discloses a mixed stretch control system which comprises needles directed towards the rear and mounted on two sleeves. This system has the drawbacks mentioned above of the sleeve systems.
  • Document EP-A-0.029.113 also discloses a stretch control system of the bar type carrying needles.
  • the needles are straight and located substantially in the plane passing through the ends of the bar, which is inconvenient when the needles are released from the web.
  • Document DE-A-2,649,486 discloses a mixed control system which overcomes the aforementioned drawbacks. To this end, it consists in grouping the advantages of needle systems and sleeve systems into a simple drawing device which allows good fiber control, which is of attractive cost price, easy to maintain, and which allows the widest range of materials to be worked at high speed.
  • This device comprises a control system having two endless movable elements between which the textile material passes, and is characterized in that the two endless elements each consist of a succession of transverse bars articulated on chains, forming an apron and carrying needles for penetration into the material and having an active contact surface with the material.
  • the control is done by needles, and by contact as on sleeve systems.
  • the two endless elements have the same structure, the organs of penetration into the ribbon being offset from one element to another in the zone of cooperation of said elements with the ribbon.
  • the object of the invention is to improve this mixed control system which has just been described.
  • the invention provides an arrangement of bars favorable to the release of the needles from the web.
  • the subject of the invention is a control system having two endless mobile elements between which the textile material passes, and the two endless elements of which each consist of a succession of transverse bars articulated on chains, forming an apron. and carrying needles for penetration into the material and having an active contact surface with the material, characterized in that the needles are implanted on the barrel body cantilevered forward with respect to the joints on its drive means and in that the needles are inclined rearwardly with respect to the direction of advance of the fiber ribbon during drawing.
  • the needles leave the material in a much more advantageous manner, which avoids windings.
  • the inclination of the hands can be between 1 ° and 45 °.
  • the first implementation variant of the invention (Fig. 1) consists in the use of needles 13 straight in the directions of advancement of the bars and of the material (arrow 16) and implanted obliquely towards the rear in tray 12 of the bar.
  • the second variant (Fig. 2) consists in the use of needles 13 bent at the projection to give them the inclination towards the rear.
  • the third variant (Fig. 3) consists in bending the needles 13 at an intermediate point between the projection and the point.
  • the fourth variant (Fig. 4) consists in using needles 13 bent backwards in the shape of a curve (for example: arc of a circle) from the projection.
  • a fifth and a sixth variant consist in using needles 13 having a certain sawtooth profiling.
  • FIG. 7 to 9 Other variants consist in mounting the straight needles perpendicular to the upper surface inclined towards the rear of the bar.
  • the surface on which the needles are implanted may have any sections (for example: flat, curved, inclined, curvilinear) to facilitate the control of the fibers by the active surface of the bars.
  • This surface may be metallic or be coated or lined with a material facilitating the control of the fibers.
  • backward-angled needles in the control system is that the fibers are very stable in the vertical direction. Indeed, due to the backward inclination of the needles, once the needles have penetrated into the material, they constitute oblique bars which block, still in the vertical direction, the fibers which, as a result, are less free vertically. This gives the outgoing product better regularity, which is essential at this stage of manufacturing.
  • Another advantage of the needles inclined towards the rear consists in blurring the place of implantation of the needles in the sheet of fibers, which improves the regularity of the section of the outgoing ribbon.
  • this type of bar with needles inclined or profiled towards the rear can be applied to any other stretching device which uses a needle field as a control system; for example bars powered by screws or chains.
  • FIGs. 1 to 9 show, in section, the section 11 of the working part of the bar, that is to say the plate 12 which is cantilevered forward and which includes the needles 13 Part 14 is the end of the bar which is fixed on the chain or the like.
  • Two bores 15 receive the axes of the chain in order to fix, drive and drive the bar. In other words, the two bores 15 serve to make the bar of the chain integral, and this at each end of the bar.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Treatment Of Fiber Materials (AREA)

Description

La présente invention concerne l'étirage des rubans de fibres textiles.The present invention relates to the drawing of textile fiber ribbons.

On sait que, dans un dispositif d'étirage, les rubans de fibres sont étirés entre des cylindres alimentaires et des cylindres étireurs, et qu'entre ces organes d'entrée et de sortie ils sont contrôlés par un système soit à aiguilles, soit à manchons, et c'est justement un tel système de contrôle que l'invention se propose de perfectionner.It is known that, in a drawing device, the fiber ribbons are drawn between food rolls and drawing rolls, and that between these entry and exit members they are controlled by a system either with needles or with sleeves, and it is precisely such a control system that the invention proposes to improve.

Il s'est avéré que les systèmes de ce genre connus jusqu'à l'heure actuelle présentent les inconvénients suivants:

  • Les systèmes de contrôle à aiguilles, lorsqu'il s'agit de barrettes propulsées par vis, subissent une limitation de vitesse due au mode de propulsion par vis, à la résistance des corps de barrettes soumis aux chocs, et à la résistance de la soudure reliant les aiguilles à leur support, ce qui limite irrémédiablement la production.
  • Les systèmes de contrôle à aiguilles, lorsqu'il s'agit de barrettes propulsées par chaînes, ce qu'on appelle couramment "gills à chaînes", présentent des difficultés pour le guidage des barrettes; pour optimaliser la pénétration et la sortie des aiguilles dans les rubans de fibres, les barrettes sont mues à travers des biellettes pour l'orientation de celles-ci dans la phase d'entrée et de sortie; ces biellettes rendent plus complexe le système de propulsion.
  • Les systèmes de contrôle à manchons peuvent fonctionner plus vite que les systèmes précédents, mais, par contre, ne conviennent pas dans les cas où beaucoup de rattaches se présentent dans les rubans ou, d'une manière générale, lorsque de fortes variations de fibres textiles se présentent à eux. De même, ils conviennent mal dans le cas de travail de fibres du type laine ou coupe longue, dans le cas où l'on ne travaille pas en faible charge.
It has been found that such systems known up to now have the following drawbacks:
  • Needle control systems, in the case of bars propelled by screws, undergo a speed limitation due to the mode of propulsion by screws, to the resistance of the barrel bodies subjected to shocks, and to the resistance of the weld connecting the needles to their support, which irreparably limits production.
  • Needle control systems, in the case of bars propelled by chains, what is commonly called "chain gills", present difficulties in guiding the bars; to optimize the penetration and exit of the needles in the fiber ribbons, the bars are moved through rods for the orientation of the latter in the entry and exit phase; these links make the propulsion system more complex.
  • Sleeve control systems can operate faster than previous systems, but, on the other hand, are not suitable in cases where a lot of piecing occurs in the ribbons or, in general, when large variations in textile fibers present themselves to them. Likewise, they are ill-suited in the case of working fibers of the wool or long cut type, in the case where the work is not carried out at low load.

On connaît par le document DE-C-156.223 un système de contrôle mixte d'étirage qui comporte des aiguilles dirigées vers l'arrière et montées sur deux manchons. Ce système présente les inconvénients rappelés ci-dessus des systèmes à manchons.Document DE-C-156.223 discloses a mixed stretch control system which comprises needles directed towards the rear and mounted on two sleeves. This system has the drawbacks mentioned above of the sleeve systems.

On connaît aussi par le document EP-A-0.029.113 un système de contrôle d'étirage du type à barrettes portant des aiguilles. Dans ce système, les aiguilles sont droites et implantées sensiblement dans le plan passant par les extrémités de la barrette, ce qui est gênant lors du dégagement des aiguilles par rapport à la nappe.Document EP-A-0.029.113 also discloses a stretch control system of the bar type carrying needles. In this system, the needles are straight and located substantially in the plane passing through the ends of the bar, which is inconvenient when the needles are released from the web.

On connaît par le document DE-A- 2.649.486 un système de contrôle mixte qui remédie aux inconvénients précités. A cet effet il consiste à regrouper les avantages des systèmes à aiguilles et des systèmes à manchons en un dispositif d'étirage simple qui permet un bon contrôle des fibres, qui soit d'un prix de revient intéressant, d'un entretien facile, et qui permet de travailler à grande vitesse la plus grande gamme de matières.Document DE-A-2,649,486 discloses a mixed control system which overcomes the aforementioned drawbacks. To this end, it consists in grouping the advantages of needle systems and sleeve systems into a simple drawing device which allows good fiber control, which is of attractive cost price, easy to maintain, and which allows the widest range of materials to be worked at high speed.

Ce dispositif comporte un système de contrôle ayant deux éléments mobiles sans fin entre lesquels passe la matière textile, et se caractérise par le fait que les deux éléments sans fin sont constitués chacun par une succession de barres transversales articulées sur des chaînes, formant tablier et portant des aiguilles pour la pénétration dans la matière et présentant une surface active de contact avec la matière. Ainsi, le contrôle est fait par aiguilles, et par contact comme sur les systèmes à manchons. Les deux éléments sans fin ont la même structure, les organes de pénétration dans le ruban étant décalés d'un élément à l'autre dans la zone de coopération desdits éléments avec le ruban.This device comprises a control system having two endless movable elements between which the textile material passes, and is characterized in that the two endless elements each consist of a succession of transverse bars articulated on chains, forming an apron and carrying needles for penetration into the material and having an active contact surface with the material. Thus, the control is done by needles, and by contact as on sleeve systems. The two endless elements have the same structure, the organs of penetration into the ribbon being offset from one element to another in the zone of cooperation of said elements with the ribbon.

Le but de l'invention est d'améliorer ce système de contrôle mixte qui vient d'être décrit.The object of the invention is to improve this mixed control system which has just been described.

En effet, dans le travail de certaines matières, il est apparu que le dégagement des aiguilles de la nappe à l'endroit des cylindres étireurs peut causer des entraînements de fibres hors de la nappe textile.Indeed, in the work of certain materials, it appeared that the release of the needles from the ply at the location of the stretching cylinders can cause entrainment of fibers out of the textile ply.

Pour y remédier, l'invention propose un agencement de barrettes favorable au dégagement des aiguilles de la nappe.To remedy this, the invention provides an arrangement of bars favorable to the release of the needles from the web.

A cet effet, l'invention a pour objet un système de contrôle ayant deux éléments mobiles sans fin entre lesquels passe la matière textile, et dont les deux éléments sans fin sont constitués chacun par une succession de barres transversales articulées sur des chaînes, formant tablier et portant des aiguilles pour la pénétration dans la matière et présentant une surface active de contact avec la matière, caractérisé en ce que les aiguilles sont implantées sur le corps de barrette en porte-à-faux vers l'avant par rapport aux articulations sur ses moyens d'entraînement et en ce que les aiguilles sont inclinées vers l'arrière par rapport au sens d'avancement du ruban de fibres en cours d'étirage.To this end, the subject of the invention is a control system having two endless mobile elements between which the textile material passes, and the two endless elements of which each consist of a succession of transverse bars articulated on chains, forming an apron. and carrying needles for penetration into the material and having an active contact surface with the material, characterized in that the needles are implanted on the barrel body cantilevered forward with respect to the joints on its drive means and in that the needles are inclined rearwardly with respect to the direction of advance of the fiber ribbon during drawing.

Avec un tel agencement, les aiguilles quittent la matière d'une façon beaucoup plus avantageuse, ce qui évite les enroulements.With such an arrangement, the needles leave the material in a much more advantageous manner, which avoids windings.

L'inclinaison des aiguilles peut se situer entre 1° et 45°.The inclination of the hands can be between 1 ° and 45 °.

D'autres caractéristiques et avantages de l'invention ressortiront de la description qui va suivre et de l'examen des dessins annexés qui montrent, à titre d'exemples non limitatifs, quelques modes de réalisation de l'invention.Other characteristics and advantages of the invention will emerge from the description which follows and from the examination of the appended drawings which show, by way of nonlimiting examples, some embodiments of the invention.

Dans les dessins:

  • Fig. 1 est une section de barrette avec aiguille courante droite implantée en oblique vers l'arrière dans le corps de barrette.
  • Fig. 2 est une section de barrette avec aiguille pliée vers l'arrière à la saillie.
  • Fig. 3 est une section de barrette avec aiguille pliée vers l'arrière en un point intermédiaire entre la saillie et la pointe.
  • Fig. 4 est une section de barrette avec aiguille recourbée vers l'arrière à partir de la saillie.
  • Fig. 5 est une section de barrette avec aiguille et dent de scie dont le dos est incliné puis taillé en pointe.
  • Fig. 6 est une section de barrette avec aiguille en dent de scie dont le dos est arrondi.
  • Fig. 7 représente une variante où toute la surface supérieure de la barrette est inclinée et dans laquelle sont implantées des aiguilles droites, la surface supérieure de la barrette donnant l'inclinaison des aiguilles vers l'arrière.
  • Fig. 8 montre une réalisation où une barrette plate est montée inclinée vers l'arrière, les aiguilles implantées étant droites et l'inclinaison étant donnée par le montage de la barrette.
  • Fig. 9 montre une autre variante où c'est encore la surface qui porte les aiguilles qui est inclinée vers l'arrière, les aiguilles implantées étant droites et l'inclinaison étant donnée par la surface qui les porte.
  • Et Fig. 10 est une vue d'une partie du champ aiguillé équipé de barrettes conformes à la Fig. 1, la flèche f indiquant le sens d'avancement de la matière et des barrettes.
In the drawings:
  • Fig. 1 is a bar section with a straight running needle implanted obliquely backwards in the bar body.
  • Fig. 2 is a bar section with needle bent backwards at the projection.
  • Fig. 3 is a bar section with needle folded backwards at an intermediate point between the projection and the point.
  • Fig. 4 is a bar section with a needle bent backwards from the projection.
  • Fig. 5 is a bar section with needle and sawtooth whose back is inclined and then cut into a point.
  • Fig. 6 is a bar section with a sawtooth needle with a rounded back.
  • Fig. 7 shows a variant in which the entire upper surface of the bar is inclined and in which straight needles are implanted, the upper surface of the bar giving the inclination of the needles backwards.
  • Fig. 8 shows an embodiment where a flat bar is mounted inclined towards the rear, the implanted needles being straight and the inclination being given by the mounting of the bar.
  • Fig. 9 shows another variant where it is also the surface which carries the needles which is inclined backwards, the implanted needles being straight and the inclination being given by the surface which carries them.
  • And Fig. 10 is a view of part of the needle field equipped with bars in accordance with FIG. 1, the arrow f indicating the direction of advance of the material and the bars.

La première variante de mise en oeuvre de l'invention (Fig. 1) consiste en l'utilisation d'aiguilles 13 droites dans les sens de l'avancement des barrettes et de la matière (flèche 16) et implantées en oblique vers l'arrière dans le plateau 12 de la barrette.The first implementation variant of the invention (Fig. 1) consists in the use of needles 13 straight in the directions of advancement of the bars and of the material (arrow 16) and implanted obliquely towards the rear in tray 12 of the bar.

La deuxième variante (Fig. 2) consiste en l'utilisation d'aiguilles 13 pliées à la saillie pour leur donner l'inclinaison vers l'arrière.The second variant (Fig. 2) consists in the use of needles 13 bent at the projection to give them the inclination towards the rear.

La troisième variante (Fig. 3) consiste à plier les aiguilles 13 en un point intermédiaire entre la saillie et la pointe.The third variant (Fig. 3) consists in bending the needles 13 at an intermediate point between the projection and the point.

La quatrième variante (Fig. 4) consiste à utiliser des aiguilles 13 pliées vers l'arrière en forme de courbe (par exemple: arc de cercle) à partir de la saillie.The fourth variant (Fig. 4) consists in using needles 13 bent backwards in the shape of a curve (for example: arc of a circle) from the projection.

Une cinquième et une sixième variantes (Figs. 5 et 6) consistent à utiliser des aiguilles 13 ayant un certain profilage en dent de scie.A fifth and a sixth variant (Figs. 5 and 6) consist in using needles 13 having a certain sawtooth profiling.

D'autres variantes (Figs. 7 à 9) consistent à monter les aiguilles droites perpendiculairement sur la surface supérieure inclinée vers l'arrière de la barrette.Other variants (Figs. 7 to 9) consist in mounting the straight needles perpendicular to the upper surface inclined towards the rear of the bar.

Par ailleurs, selon l'invention, la surface sur laquelle sont implantées les aiguilles peut présenter des sections quelconques (par exemple: plate, courbe, inclinée, curviligne) pour faciliter le contrôle des fibres par la surface active des barrettes. Cette surface peut être métallique ou être revêtue ou garnie d'une matière facilitant le contrôle des fibres.Furthermore, according to the invention, the surface on which the needles are implanted may have any sections (for example: flat, curved, inclined, curvilinear) to facilitate the control of the fibers by the active surface of the bars. This surface may be metallic or be coated or lined with a material facilitating the control of the fibers.

L'avantage que confèrent les aiguilles inclinées vers l'arrière au système de contrôle est une grande stabilité des fibres dans le sens vertical. En effet, de par l'inclinaison vers l'arrière des aiguilles, une fois que les aiguilles ont pénétré dans la matière, elles constituent des barres obliques qui bloquent, toujours dans le sens vertical, les fibres qui, de ce fait sont moins libres verticalement. Ceci apporte au produit sortant une meilleure régularité, ce qui est essentiel à ce stade de la fabrication.The advantage of backward-angled needles in the control system is that the fibers are very stable in the vertical direction. Indeed, due to the backward inclination of the needles, once the needles have penetrated into the material, they constitute oblique bars which block, still in the vertical direction, the fibers which, as a result, are less free vertically. This gives the outgoing product better regularity, which is essential at this stage of manufacturing.

Un autre avantage des aiguilles inclinées vers l'arrière consiste à brouiller l'endroit d'implantation des aiguilles dans la nappe de fibres, ce qui améliore la régularité de la section du ruban sortant.Another advantage of the needles inclined towards the rear consists in blurring the place of implantation of the needles in the sheet of fibers, which improves the regularity of the section of the outgoing ribbon.

Bien entendu, ce genre de barrette à aiguilles inclinées ou profilées vers l'arrière peut s'appliquer à tout autre dispositif d'étirage qui utilise un champ aiguillé comme système de contrôle; par exemple des barrettes propulsées par vis ou chaînes.Of course, this type of bar with needles inclined or profiled towards the rear can be applied to any other stretching device which uses a needle field as a control system; for example bars powered by screws or chains.

Pour ce qui est des différentes Figs. 1 à 9, elles montrent, en coupe, la section 11 de la partie de travail de la barrette, c'est-à-dire le plateau 12 qui est en porte-à-faux vers l'avant et qui comporte les aiguilles 13. La partie 14 est l'extrémité de la barrette qui est fixée sur la chaîne ou analogue. Deux alésages 15 reçoivent les axes de la chaîne afin de fixer, entraîner et conduire la barrette. En d'autres termes, les deux alésages 15 servent à rendre solidaire la barrette de la chaîne, et ceci à chaque extrémité de la barrette.Regarding the different Figs. 1 to 9, they show, in section, the section 11 of the working part of the bar, that is to say the plate 12 which is cantilevered forward and which includes the needles 13 Part 14 is the end of the bar which is fixed on the chain or the like. Two bores 15 receive the axes of the chain in order to fix, drive and drive the bar. In other words, the two bores 15 serve to make the bar of the chain integral, and this at each end of the bar.

Dans la Fig. 10, on a fait apparaître des guides 17 des barrettes dans leur parcours de travail ainsi que des maillons 18 des chaînes d'entraînement des barrettes.In Fig. 10, guides 17 of the bars have been made to appear in their working path as well as links 18 of the chains driving the bars.

Claims (10)

1. A stretching device for textile fibre bands, of the type comprising a control system having two endless movable members between which the textile material passes, and the two endless members of which are each constituted by a succession of cross-bars pivotally connected on chains, forming an apron and supporting needles (13) for penetration into the material and having an active surface for contact with the material, characterized in that the needles (13) are implanted on the strip body (12) protruding forward relative to the pivot points (15) on its driving means, and in that the needles (13) slant rearwards relative to the direction of forward movement (16) of the fibre band during the stretching.
2. A stretching device according to claim 1, characterized by a straight running needle (13) obliquely implanted in the strip body (12).
3. A device according to claim 1, characterized in that the needle (13) is folded at the projecting part.
4. A device according to claim 1, characterized in that the needle (13) is folded at an intermediate point between the projection and the point.
5. A device according to claim 1, characterized in that the needle (13) is curved towards the rear starting from the projection.
6. A device according to claim 1, characterized in that the needle (13) has the shape of a saw tooth the back of which is inclined and then cut to a point.
7. A device according to claim 1, characterized in that the needle (13) has the shape of a saw tooth the back of which is rounded,
8. A device according to claim 1, characterized in that the whole of the top surface of the strip (12) is slanting rearwards and in that the needles implanted in it are straight needles.
9. A device according to claim 1, characterized in that it comprises a flat strip (12) mounted slanting towards the rear, the implanted needles (13) being straight and the slanting being produced by the assembly of the strip (12).
10. A device according to claim 1, characterized in that the surface which supports the needles (13) is inclined, the needles implanted in it being straight and the slanting being produced by the surface which supports them,
EP19880400164 1987-01-30 1988-01-26 Drafting apparatus for webs of textile fibres Expired - Lifetime EP0277871B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8701127A FR2610334B1 (en) 1987-01-30 1987-01-30 DRAWING DEVICE FOR TEXTILE FIBER TAPES
FR8701127 1987-01-30

Publications (2)

Publication Number Publication Date
EP0277871A1 EP0277871A1 (en) 1988-08-10
EP0277871B1 true EP0277871B1 (en) 1991-03-27

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EP19880400164 Expired - Lifetime EP0277871B1 (en) 1987-01-30 1988-01-26 Drafting apparatus for webs of textile fibres

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EP (1) EP0277871B1 (en)
DE (1) DE3862120D1 (en)
ES (1) ES2021841B3 (en)
FR (1) FR2610334B1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2663047B1 (en) * 1990-06-06 1992-12-31 Schlumberger Cie DRAWING DEVICE FOR TEXTILE FIBER TAPES.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE156223C (en) *
CH606528A5 (en) * 1975-10-28 1978-11-15 Schlumberger Cie N
DE2944680A1 (en) * 1979-11-06 1981-05-07 Staedtler & Uhl, 8540 Schwabach STRETCH BAR FOR TEXTILE PREPARATION MACHINES

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ES2021841B3 (en) 1991-11-16
DE3862120D1 (en) 1991-05-02
EP0277871A1 (en) 1988-08-10
FR2610334B1 (en) 1989-10-13
FR2610334A1 (en) 1988-08-05

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