EP2339055B1 - Circular needling machine whereby a fibrous web is supplied by means of a conveyor and a vertical chute - Google Patents

Circular needling machine whereby a fibrous web is supplied by means of a conveyor and a vertical chute Download PDF

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Publication number
EP2339055B1
EP2339055B1 EP10195878.3A EP10195878A EP2339055B1 EP 2339055 B1 EP2339055 B1 EP 2339055B1 EP 10195878 A EP10195878 A EP 10195878A EP 2339055 B1 EP2339055 B1 EP 2339055B1
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EP
European Patent Office
Prior art keywords
conveyor
needling
vertical axis
fibrous web
slot
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EP10195878.3A
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German (de)
French (fr)
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EP2339055A1 (en
Inventor
Vincent Delecroix
Marc Faron
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Safran Landing Systems SAS
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Messier Bugatti Dowty SA
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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
    • D04H18/00—Needling machines
    • D04H18/02—Needling machines with needles

Abstract

The machine for circularly needling a textile structure formed from a helical fibrous layer (106), comprises a needling table placed under a table (100) for supplying a fibrous sheet to the needle. The supply needle comprises a circular conveyor (102) centered on a vertical axis, and is disposed in the fibrous layer. The conveyor has a radial slot sealed in it for continuously rolling the fibrous web disposed on the conveyor. The slot is sealed in the conveyor towards a straight duct that extends vertically between the conveyor and a tray centered on the vertical axis (104) of the conveyor. The machine for circularly needling a textile structure formed from a helical fibrous layer (106), comprises a needling table placed under a table (100) for supplying a fibrous sheet to the needle. The supply needle comprises a circular conveyor (102) centered on a vertical axis, and is disposed in the fibrous layer. The conveyor has a radial slot sealed in it for continuously rolling the fibrous web disposed on the conveyor. The slot is sealed in the conveyor towards a straight duct that extends vertically between the conveyor and a tray centered on the vertical axis (104) of the conveyor, where the support plate includes a unit for rotating the fibrous web around the vertical axis. The needling table comprises a guiding plate centered on vertical axis and movable vertically according to the support plate between a low position of operation in which it is based on the support plate and a raised position to release in which it is positioned above the support plate. The straight duct has a secured portion to the feed table and another secured portion to the plate for guiding the needling table, where the portions are adapted to translate one inside the other during the vertical movements of the guide plate. The unit for rotating the fibrous web includes two pairs of tapered rollers angularly spaced from each other, and is intended to come into contact with the fibrous web feed on the needling table. The conical roller is connected to the guiding plate of the needling table, and disposed on outlet of the straight duct. The supply roller further comprises a roller disposed in the conveyor and angularly intercalated between the slot and inlet of the duct. A unit is arranged for evacuation of the textile structure apart from the support plate of the needling table, and comprises an arm controller equipped with an articulated rod. The needling table comprises a unit for cutting fibrous layer. The circular conveyor of the supply table comprises two curved portions each present in the form of semi-disc and disposed side by side. The slot is formed by a space connected between two portions of the conveyor.

Description

Arrière-plan de l'inventionBackground of the invention

La présente invention se rapporte au domaine général des machines d'aiguilletage circulaire pour la réalisation de structures textiles aiguilletées, et concerne plus particulièrement l'alimentation automatique en nappes fibreuses de telles machines.The present invention relates to the general field of circular needling machines for producing needled textile structures, and more particularly relates to the automatic supply of fibrous webs of such machines.

Il est connu d'utiliser une machine d'aiguilletage de type circulaire pour la fabrication de structures textiles annulaires destinées à constituer le renfort fibreux de pièces annulaires en matériau composite, notamment des disques de frein, tels que des disques en matériau composite carbone/carbone (C/C) pour des freins d'avion.It is known to use a circular type needling machine for the manufacture of annular textile structures intended to constitute the fibrous reinforcement of annular pieces made of composite material, in particular brake discs, such as discs made of carbon / carbon composite material. (C / C) for airplane brakes.

Dans une telle machine d'aiguilletage, une nappe fibreuse hélicoïdale à aiguilleter est posée sur une table d'aiguilletage et entraînée en rotation par des moyens d'entraînement le plus souvent à friction. L'alimentation de ce type de machine peut être faite à plat au niveau de la table d'aiguilletage à partir d'une nappe de matière à aiguilleter débitée d'un dispositif de déroulage externe à la machine d'aiguilletage.In such a needling machine, a fibrous helical fibrous web is placed on a needling table and driven in rotation by drive means most often friction. The feed of this type of machine can be made flat at the needling table from a sheet of stuffing material delivered from a peeling device external to the needling machine.

On connaît également du document WO 02/088449 une machine d'aiguilletage dans laquelle l'alimentation en nappes fibreuses à aiguilleter est réalisée de façon automatique. A cet effet, la machine d'aiguilletage comprend un panier de stockage disposé au-dessus de la table d'aiguilletage et contenant la nappe fibreuse à aiguilleter, un ensemble de rouleaux coniques pour extraire en continu la nappe du panier de stockage et une goulotte hélicoïdale pour reprendre la nappe déroulée du panier de stockage et l'amener vers la table d'aiguilletage au niveau de moyens d'entraînement par friction. Cette machine d'aiguilletage présente toutefois l'inconvénient que les rouleaux coniques d'entraînement de la nappe fibreuse provoquent un glissement de la nappe fibreuse lors de son déroulement, ce qui se traduit par une déformation de la nappe fibreuse lorsqu'elle arrive sur la table d'aiguilletage.Document is also known WO 02/088449 a needling machine in which the supply of fibrous sheets needling is performed automatically. For this purpose, the needling machine comprises a storage basket disposed above the needling table and containing the fibrous sheet to needling, a set of conical rollers for continuously extracting the sheet from the storage basket and a chute. helical to take the unrolled web of the storage basket and bring it to the needling table at friction drive means. This needling machine, however, has the disadvantage that the conical rollers driving the fibrous web cause a sliding of the fibrous web during its unwinding, which results in a deformation of the fibrous web when it arrives on the web. needling table.

Objet et résumé de l'inventionObject and summary of the invention

La présente invention a donc pour but principal de pallier de tels inconvénients en proposant une machine d'aiguilletage circulaire pour laquelle l'alimentation de la table d'aiguilletage en nappes fibreuses s'effectue de façon automatique et sans déformation de celles-ci.The main object of the present invention is thus to overcome such disadvantages by proposing a circular needling machine for which the supply of the needling table in fibrous webs takes place automatically and without deformation thereof.

Ce but est atteint grâce à une machine d'aiguilletage circulaire d'une structure textile formée à partir d'une nappe fibreuse hélicoïdale, comprenant une table d'aiguilletage disposée sous une table d'alimentation en nappe fibreuse hélicoïdale à aiguilleter, et dans laquelle, conformément à l'invention, la table d'alimentation comprend un convoyeur circulaire centré sur un axe vertical et sur lequel est destiné à être disposée une nappe fibreuse hélicoïdale à aiguilleter, le convoyeur ayant une fente radiale débouchant sous le convoyeur circulaire pour dérouler en continu la nappe fibreuse disposée sur le convoyeur, la fente débouchant sous le convoyeur vers une goulotte sensiblement droite qui s'étend verticalement entre le convoyeur et un plateau support de la table d'aiguilletage centré sur l'axe vertical du convoyeur de façon à reprendre la nappe déroulée du convoyeur et l'amener sur la table d'aiguilletage, ledit plateau support ayant des moyens d'entraînement en rotation de la nappe fibreuse autour de l'axe vertical.This object is achieved by means of a circular needling machine of a textile structure formed from a helical fibrous web, comprising a needling table disposed under a helical fiber fibrous web supplying table, and in which according to the invention, the feed table comprises a circular conveyor centered on a vertical axis and on which is intended to be arranged a helical fibrous sheet needle, the conveyor having a radial slot opening under the circular conveyor to unroll in continuous fibrous web disposed on the conveyor, the slot opening under the conveyor to a substantially straight chute which extends vertically between the conveyor and a support plate of the needling table centered on the vertical axis of the conveyor so as to resume the unrolled web of the conveyor and bring it to the needling table, said support plate having means for rotation of the fibrous web around the vertical axis.

La présence d'un convoyeur circulaire permet de délivrer de la nappe fibreuse sans tension, celle-ci étant alors guidée verticalement vers la table d'aiguilletage à l'aide de la goulotte. Ainsi, aucune déformation de la nappe fibreuse n'apparaît avant son aiguilletage. En outre, par rapport à une goulotte hélicoïdale, la présence d'une goulotte sensiblement droite permet de gagner de la place pour positionner d'autres fonctions de la machine (comme l'engagement de la nappe fibreuse et sa découpe automatique).The presence of a circular conveyor makes it possible to deliver the fibrous web without tension, which tension is then guided vertically towards the needling table by means of the chute. Thus, no deformation of the fibrous web appears before needling. In addition, compared to a helical chute, the presence of a substantially straight chute saves space to position other functions of the machine (as the engagement of the fibrous web and its automatic cutting).

Selon une disposition avantageuse, la table d'aiguilletage comprend en outre un plateau de guidage centré sur l'axe vertical et mobile verticalement par rapport au plateau support entre une position basse de fonctionnement dans laquelle il repose sur ledit plateau support et une position relevée de dégagement dans laquelle il est positionné au-dessus dudit plateau support.According to an advantageous arrangement, the needling table further comprises a guide plate centered on the vertical axis and movable vertically with respect to the support plate between a low operating position in which it rests on said support plate and a raised position of clearance in which it is positioned above said support plate.

Dans ce cas, la goulotte a une portion solidaire de la table d'alimentation et une autre portion solidaire du plateau de guidage de la table d'aiguilletage, ces portions étant aptes à translater l'une à l'intérieur de l'autre lors des déplacements verticaux du plateau de guidage.In this case, the chute has a portion secured to the feed table and another portion secured to the guide plate of the needling table, these portions being able to translate one inside the other during vertical movements of the guide plate.

Les moyens d'entraînement en rotation de la nappe fibreuse peuvent comprendre deux paires de rouleaux coniques espacées angulairement l'un de l'autre et destinées à venir en contact avec la nappe fibreuse amenée sur la table d'aiguilletageThe means for rotating the fibrous web may comprise two pairs of conical rollers angularly spaced apart from one another and intended to come into contact with the fibrous web brought onto the needling table.

La machine peut comprendre en outre un rouleau conique presseur solidaire du plateau de la table d'aiguilletage et disposé en sortie de la goulotte.The machine may further comprise a conical pressure roller secured to the plate of the needling table and disposed at the outlet of the chute.

La table d'alimentation peut comprendre en outre un rouleau disposé sous le convoyeur circulaire et intercalé angulairement entre l'entrée de la fente et la goulotte de façon à permettre la reprise d'une extrémité libre de la nappe déroulée du convoyeur et son guidage vers la goulotte.The feed table may further comprise a roller disposed under the circular conveyor and angularly interposed between the inlet of the slot and the chute so as to allow the recovery of a free end of the unrolled sheet of the conveyor and its guiding towards the chute.

Des moyens d'évacuation de la structure textile hors du plateau support de la table d'aiguilletage peuvent être prévus, ces moyens comprenant avantageusement un bras manipulateur muni d'un doigt articulé pour saisir et évacuer la structure textile. Des moyens de découpe de la nappe fibreuse peuvent également être prévus.Means for evacuating the textile structure from the support plate of the needling table may be provided, these means advantageously comprising a manipulator arm provided with an articulated finger for gripping and evacuating the textile structure. Cutting means of the fibrous web may also be provided.

De préférence, le convoyeur circulaire de la table d'alimentation comprend deux portions courbes de convoyeur chacune en forme de demi-disque et qui sont disposées face à face, la fente étant formée par un espace laissé entre les deux portions de convoyeurs.Preferably, the circular conveyor of the feed table comprises two curved conveyor portions each in the form of a half-disc and which are disposed face to face, the slot being formed by a space left between the two conveyor portions.

Brève description des dessinsBrief description of the drawings

D'autres caractéristiques et avantages de la présente invention ressortiront de la description faite ci-dessous, en référence aux dessins annexés qui en illustrent un exemple de réalisation dépourvu de tout caractère limitatif. Sur les figures :

  • la figure 1 est une vue générale en perspective d'une machine d'aiguilletage circulaire selon l'invention;
  • la figure 2 montre de façon schématique en vue de dessus et en écorché la table d'alimentation de la machine d'aiguilletage de la figure 1;
  • la figure 3 est une vue en coupe selon III-III de la figure 2 ;
  • la figure 4 est une vue schématique et de dessus de la table d'aiguilletage de la machine d'aiguilletage de la figure 1 ;
  • les figures 5A et 5B sont des vues schématiques montrant la table d'aiguilletage de la machine d'aiguilletage de la figure 1 dans deux positions différentes ; et
  • la figure 6 montre de façon schématique la table d'évacuation de la machine d'aiguilletage de la figure 1.
Other features and advantages of the present invention will emerge from the description given below, with reference to the accompanying drawings which illustrate an embodiment having no limiting character. In the figures:
  • the figure 1 is a general perspective view of a circular needling machine according to the invention;
  • the figure 2 shows schematically in top view and cutaway the feed table of the needling machine of the figure 1 ;
  • the figure 3 is a sectional view along III-III of the figure 2 ;
  • the figure 4 is a schematic view from above of the needling table of the needling machine of the figure 1 ;
  • the Figures 5A and 5B are schematic views showing the needling table of the needling machine of the figure 1 in two different positions; and
  • the figure 6 shows schematically the discharge table of the needling machine of the figure 1 .

Description détaillée d'un mode de réalisationDetailed description of an embodiment

La figure 1 illustre de façon schématique une machine d'aiguilletage circulaire 10 selon l'invention. Cette machine est destinée à l'aiguilletage d'une structure textile, ou préforme annulaire, formée à partir d'une nappe (ou bande) fibreuse hélicoïdale.The figure 1 schematically illustrates a circular needling machine 10 according to the invention. This machine is intended for the needling of a textile structure, or annular preform formed from a fibrous web (or band) helical.

La machine d'aiguilletage 10 comprend une table 100 d'alimentation en nappe fibreuse à aiguilleter, une table d'aiguilletage 200 disposée sous la table d'alimentation, et une table 300 d'évacuation de la structure aiguilletée hors de la table d'aiguilletage.The needling machine 10 comprises a table 100 for supplying a fibrous sheet with needling, a needling table 200 placed under the feed table, and a table 300 for removing the needle-punched structure from the table. needling.

La table 100 d'alimentation en nappe fibreuse à aiguilleter comprend un convoyeur circulaire 102 qui est centré sur un axe vertical 104 et sur lequel est disposée une nappe fibreuse 106 à aiguilleter. La nappe fibreuse est plus précisément enroulée en plusieurs couches autour d'un fût central 108 centré sur l'axe vertical 104 et elle est entraînée en rotation autour de cet axe par le convoyeur circulaire.The needling fibrous web supply table 100 comprises a circular conveyor 102 which is centered on a vertical axis 104 and on which is disposed a fibrous fibrous web 106. The fibrous web is more precisely wound in several layers around a central shaft 108 centered on the vertical axis 104 and is rotated around this axis by the circular conveyor.

Comme représenté sur les figures 1 à 3, le convoyeur circulaire 102 de la table d'alimentation se compose plus précisément de deux portions courbes 102a, 102b de convoyeur chacune en forme de demi-disque et qui sont disposées en regard l'une de l'autre (les bords droits de ces portions de convoyeur sont parallèles et face à face). Le sens de rotation de ces portions courbes de convoyeur est dirigé de sorte à faire réaliser un tour complet de 360° à la nappe fibreuse 106 autour de l'axe vertical 104.As shown on Figures 1 to 3 the circular conveyor 102 of the feed table is more precisely composed of two curved conveyor portions 102a, 102b each in the form of a half-disc and which are arranged opposite one another (the straight edges of these conveyor portions are parallel and face to face). The direction of rotation of these curved conveyor portions is directed so as to cause a complete turn of 360 ° to the fibrous web 106 about the vertical axis 104.

Chaque portion courbe 102a, 102b de convoyeur permet donc de réaliser un demi-tour de 180° à la nappe fibreuse 106. A cet effet, de façon connue en soi, chaque portion courbe de convoyeur comprend une bande sans fin 110a, 110b tendue autour d'une barre cylindrique fixe 112a, 112b d'axe horizontal qui lui fait épauser une trajectoire semi-circulaire. Le bord courbe 114a, 114b de cette bande sans fin est rendu solidaire d'une chaîne sans fin 116a, 116b (ou similaire) apte à suivre une trajectoire semi-circulaire. Cette chaîne sans fin est tendue entre deux pignons 117a, 117b coaxiaux à la barre cylindrique 112a, 112b, l'un de ces pignons étant entraîné en rotation par un moteur 118a, 118b. Ces moteurs 118a, 118b sont synchronisés pour commander une même vitesse de rotation aux deux bandes sans fin des portions courbes de convoyeur.Each conveying curved portion 102a, 102b therefore makes it possible to perform a 180 ° half-turn to the fibrous web 106. For this purpose, in a manner known per se, each curved conveyor portion comprises an endless band 110a, 110b stretched around of a fixed cylindrical bar 112a, 112b of horizontal axis which causes it to erase a semicircular trajectory. The curved edge 114a, 114b of this endless band is made integral with an endless chain 116a, 116b (or similar) capable of following a semicircular trajectory. This endless chain is stretched between two pinions 117a, 117b coaxial with the cylindrical bar 112a, 112b, one of these pinions being rotated by a motor 118a, 118b. These motors 118a, 118b are synchronized to control the same speed of rotation to the two endless belts of the curved conveyor portions.

Les portions courbes 102a, 102b de convoyeur sont espacées l'une de l'autre de façon à ménager entre elles une fente radiale 120 pour permettre de dérouler la nappe fibreuse 106 positionnée sur le convoyeur circulaire. Une plaque 122 recouvre la moitié environ de cet espacement entre les portions courbes de convoyeur.The curved portions 102a, 102b of the conveyor are spaced apart from each other so as to arrange between them a radial slot 120 to enable unwinding the fibrous web 106 positioned on the circular conveyor. A plate 122 covers about half of this spacing between the curved conveyor portions.

La fente radiale 120 débouche sous le convoyeur circulaire 102 de la table d'alimentation vers une goulotte sensiblement droite 400 qui s'étend verticalement entre le convoyeur circulaire et la table d'aiguilletage 200. Cette goulotte a pour fonction de reprendre la nappe 106 qui est déroulée du convoyeur et de la guider verticalement sur la table d'aiguilletage.The radial slot 120 opens under the circular conveyor 102 of the supply table to a substantially straight trough 400 which extends vertically between the circular conveyor and the needling table 200. This chute has the function of taking up the sheet 106 which is unrolled from the conveyor and guide vertically on the needling table.

A cet effet, comme représenté sur la figure 2, l'entrée 402 de la goulotte 400 est légèrement décalée angulairement (dans la direction de rotation du convoyeur circulaire 102) par rapport à la fente 120. De façon avantageuse, un rouleau conique 124 est disposé sous le convoyeur circulaire 102 dont il est solidaire et intercalé angulairement entre la fente 102 et l'entrée 402 de la goulotte 400. Ce rouleau permet ainsi de reprendre une extrémité libre de la nappe fibreuse 106 déroulée du convoyeur et de la guider vers l'entrée de la goulotte.For this purpose, as shown on the figure 2 , the inlet 402 of the chute 400 is slightly angularly offset (in the direction of rotation of the circular conveyor 102) relative to the slot 120. Advantageously, a conical roller 124 is disposed under the circular conveyor 102 which it is secured and angularly interposed between the slot 102 and the inlet 402 of the chute 400. This roller thus makes it possible to take up a free end of the fibrous web 106 unwound from the conveyor and to guide it towards the inlet of the chute.

La goulotte droite 400 se présente sous la forme d'un conduit tubulaire creux s'étendant verticalement depuis son entrée 402 s'ouvrant sous le convoyeur circulaire 102 jusqu'à sa sortie courbe 404 dont le contour épouse le profil curviligne d'un plateau support 202 de la table d'aiguilletage (voir la figure 4). Ce dernier est centré sur l'axe vertical 104 et reçoit la nappe fibreuse amenée par la goulotte depuis la table d'alimentation.The right chute 400 is in the form of a hollow tubular duct extending vertically from its inlet 402 opening under the circular conveyor 102 to its curve outlet 404 whose contour matches the curvilinear profile of a support plate 202 of the needling table (see figure 4 ). The latter is centered on the vertical axis 104 and receives the fibrous web fed by the chute from the feed table.

La nappe fibreuse ainsi amenée sur le plateau support 204 est entraînée en rotation autour de l'axe vertical 104 dans le même sens de rotation que le convoyeur circulaire pour passer sous une tête d'aiguilletage décrite ultérieurement. A cet effet, des moyens d'entraînement en rotation de la nappe fibreuse comprennent deux (ou plus) paires de rouleaux coniques qui sont espacées angulairement l'une de l'autre. Chaque paire de rouleaux 204 se compose d'un rouleau conique 204a formant rouleau presseur en contact continu avec la nappe fibreuse et d'un contre-rouleau conique 204b disposé dans une ouverture du plateau support en regard du rouleau presseur 204a de sorte à prendre en sandwich la nappe fibreuse. Plus précisément, le plateau support est ajouré de sorte que les contre-rouleaux 204b viennent directement en contact avec la nappe fibreuse déposée sur ce plateau.The fibrous web thus fed onto the support plate 204 is rotated about the vertical axis 104 in the same direction of rotation. rotation as the circular conveyor to pass under a needling head described later. For this purpose, means for rotating the fibrous web comprise two (or more) pairs of conical rollers which are spaced angularly from one another. Each pair of rollers 204 consists of a conical roll 204a forming a pressure roller in continuous contact with the fibrous web and a conical counter-roller 204b disposed in an opening of the support plate opposite the pressing roller 204a so as to take sandwich the fibrous web. More specifically, the support plate is perforated so that the counter-rollers 204b come directly into contact with the fibrous web deposited on this plate.

Les rouleaux presseurs 204a sont entraînés en rotation par exemple au moyen chacun d'un ensemble moto-réducteur 206 indépendant commandé depuis des moyens de commande (non représentés). Les contre-rouleaux 204b peuvent être libres en rotation ou éventuellement entraînés. Ces moyens de commande permettent notamment de synchroniser entre elles les vitesses de rotation des rouleaux. Bien entendu, d'autres moyens conventionnels d'entraînement en rotation et de synchronisation de vitesse des rouleaux pourraient être envisagés.The pressure rollers 204a are rotated, for example by means of each of a geared motor unit 206 independent controlled from control means (not shown). The counter-rollers 204b may be freely rotatable or possibly driven. These control means in particular make it possible to synchronize the speeds of rotation of the rollers with one another. Of course, other conventional means of rotation and speed synchronization of the rollers could be envisaged.

La table d'aiguilletage comporte également un plateau de guidage 208 se présentant sous la forme de deux parois annulaires 210 centrées sur l'axe vertical 104 et s'étendant verticalement depuis le plateau support 202. Ces parois verticales sont reliées entre elles par des renforts latéraux 212 et permettent d'assurer un guidage latéral de la nappe fibreuse lors de sa rotation autour de l'axe vertical.The needling table also comprises a guide plate 208 in the form of two annular walls 210 centered on the vertical axis 104 and extending vertically from the support plate 202. These vertical walls are interconnected by reinforcements lateral 212 and allow to provide lateral guidance of the fibrous web during its rotation about the vertical axis.

Selon une disposition avantageuse, ce plateau de guidage est mobile verticalement par rapport au plateau support 202 entre une position basse de fonctionnement dans laquelle il repose sur ledit plateau support pour assurer le guidage latéral de la nappe fibreuse 106 (figure 5A) et une position relevée de dégagement dans laquelle il est positionné au-dessus dudit plateau support (figure 5B). Dans la position relevée du plateau de guidage 208, la structure textile 214 formée à partir de la nappe fibreuse aiguilletée peut être aisément évacuée sur la table d'évacuation 300 par des moyens d'évacuation détaillés ultérieurement.According to an advantageous arrangement, this guide plate is vertically movable relative to the support plate 202 between a low operating position in which it rests on said support plate to ensure lateral guidance of the fibrous web 106 (FIG. Figure 5A ) and a raised position in which it is positioned above said support plate ( Figure 5B ). In the raised position of the guide plate 208, the textile structure 214 formed from the needled fibrous web can be easily discharged onto the discharge table 300 by subsequent detailed evacuation means.

Le déplacement vertical du plateau de guidage 208 est par exemple assuré au moyen d'un vérin 216 dont le corps 216a est solidaire de la table d'alimentation 100 et la tige 216b est fixée sur le plateau de guidage. Ce vérin est actionné par des moyens de commande (non représentés). Le plateau de guidage se relève en translatant autour d'une barre 218 centrée sur l'axe vertical 104 et fixée à la table d'alimentation.The vertical displacement of the guide plate 208 is for example provided by means of a jack 216 whose body 216a is integral with the feed table 100 and the rod 216b is fixed on the guide plate. This jack is actuated by control means (not shown). The guide plate is raised by translating around a bar 218 centered on the vertical axis 104 and fixed to the feed table.

De plus, ce déplacement vertical est permis du fait que la goulotte 400 présente une portion 400a qui est solidaire de la table d'alimentation 100 et une autre portion 400b qui est solidaire du plateau de guidage 208 de la table d'aiguilletage, ces portions 400a, 400b étant aptes à translater l'une à l'intérieur de l'autre lors des déplacements du plateau de guidage (dans l'exemple des figures 5A et 5B, c'est la portion 400b solidaire du plateau de guidage qui translate à l'intérieur de la portion 400a solidaire de la table d'alimentation lors de ces déplacements).In addition, this vertical movement is allowed because the chute 400 has a portion 400a which is integral with the feed table 100 and another portion 400b which is secured to the guide plate 208 of the needling table, these portions 400a, 400b being able to translate one inside the other during movements of the guide plate (in the example of Figures 5A and 5B it is the portion 400b secured to the guide plate which translates inside the portion 400a integral with the feed table during these movements).

Il est à noter que le plateau de guidage 208 présente une découpe angulaire 219 correspondant à la forme de la tête d'aiguilletage (décrite ci-après) et permettant le passage du plateau de guidage lors de ses déplacements verticaux.It should be noted that the guide plate 208 has an angular cutout 219 corresponding to the shape of the needling head (described below) and allowing the guide plate to pass during its vertical displacements.

Selon une autre disposition avantageuse, le plateau de guidage 208 comprend encore un rouleau conique presseur 220 qui est disposé en sortie de la goulotte 400. Ce rouleau presseur est plus précisément positionné juste au-dessus de la nappe fibreuse lorsqu'elle sort de la goulotte de façon à venir aplanir correctement la nappe fibreuse avant son passage sous la tête d'aiguilletage. Les deux paires de rouleaux 204 d'entraînement en rotation de la nappe fibreuse et le rouleau presseur 220 sont de préférence angulairement espacés les uns des autres de 120° environ (figure 4). Par ailleurs, ce rouleau presseur étant solidaire du plateau de guidage, il est apte à se déplacer verticalement avec celui-ci.According to another advantageous arrangement, the guide plate 208 further comprises a conical pressure roller 220 which is disposed at the outlet of the trough 400. This pressure roller is more precisely positioned just above the fibrous web when it leaves the trough. so as to properly level the fibrous web before passing under the needling head. The two pairs of rollers 204 for rotating the fibrous web and the pressing roller 220 are preferably angularly spaced from each other by about 120 ° ( figure 4 ). Furthermore, this pressure roller being secured to the guide plate, it is able to move vertically with it.

L'aiguilletage de la nappe fibreuse amenée sur le plateau support est réalisé par une tête d'aiguilletage 222 comportant un nombre déterminé d'aiguilles à barbes et disposée à l'aplomb du plateau support entre les deux paires de rouleaux coniques 204 d'entraînement en rotation de la nappe. De façon connue, pour permettre l'aiguilletage les unes aux autres des différentes couches superposées de nappe fibreuse, cette tête d'aiguilletage est animée d'un mouvement alternatif vertical par des moyens conventionnels de déplacement 224. En outre, le plateau support 202 de la table d'aiguilletage est mobile verticalement sous l'action de moyens de transmission de mouvement 226 au fur et à mesure du déroulement de l'opération d'aiguilletage.The needling of the fibrous web brought onto the support plate is formed by a needling head 222 comprising a determined number of barbed needles and disposed directly above the support plate between the two pairs of tapered drive rollers 204. in rotation of the tablecloth. In known manner, to allow the needling of each of the various superposed layers of fibrous web, this needling head is driven by a vertical reciprocating movement by means of conventional means of displacement 224. In addition, the support plate 202 of the needling table is vertically movable under the action of motion transmission means 226 as the needling operation progresses.

Des moyens de découpe disposés en amont de la tête d'aiguilletage sont aussi prévus pour couper la nappe une fois obtenue l'épaisseur finale prédéterminée pour la structure textile (des capteurs non représentés permettent de contrôler précisément cette épaisseur au fur et à mesure de la superposition des différentes couches). Comme représenté sur la figure 4, ces moyens de découpe peuvent comporter un couteau circulaire 228 mobile radialement le long d'un portique 230 porté par le plateau de guidage 208, ce portique étant disposé angulairement après le rouleau presseur 220 dans le sens de rotation de la nappe fibreuse. Bien entendu, d'autres moyens de découpe peuvent être envisagés.Cutting means disposed upstream of the needling head are also provided for cutting the web once the predetermined final thickness has been obtained for the textile structure (unrepresented sensors make it possible to precisely control this thickness as and when the superposition of the different layers). As shown on the figure 4 these cutting means may comprise a circular knife 228 movable radially along a gantry 230 carried by the guide plate 208, this gantry being disposed angularly after the pressure roller 220 in the direction of rotation of the fibrous web. Of course, other cutting means can be envisaged.

Une fois la nappe coupée et la structure aiguilletée, des moyens d'évacuation illustrés sur la figure 6 permettent de transférer la structure textile sur la table d'évacuation 300 en vue de son transfert vers un autre poste de la chaîne de production comme un poste de traitement thermique. A cet effet, ces moyens d'évacuation comprennent un bras manipulateur 302 s'étendant radialement et muni d'un doigt articulé 304 pour saisir et évacuer la structure textile 214 sur un plateau 306 de la table d'évacuation. Cette opération d'évacuation nécessite que le plateau de guidage de la table d'aiguilletage soit dans sa position relevée telle qu'illustrée par la figure 5B.Once the sheet is cut and the needle-punched structure, evacuation means illustrated on the figure 6 allow to transfer the textile structure on the discharge table 300 for transfer to another position in the production line as a heat treatment station. For this purpose, these evacuation means comprise a manipulator arm 302 extending radially and provided with an articulated finger 304 for gripping and evacuating the textile structure 214 on a plate 306 of the evacuation table. This evacuation operation requires that the guide plate of the needling table is in its raised position as illustrated by the Figure 5B .

Il est à noter que des moyens de commande centrale (non représentés sur les figures) sont reliés aux moteurs 118a, 118b des portions courbes de convoyeur de la table d'alimentation, aux moyens de transmission de mouvement 226 du plateau support 202 de la table d'aiguilletage, aux ensembles moto-réducteur 206 des paires de rouleaux coniques 204 d'entraînement en rotation de la nappe fibreuse, aux moyens de déplacement 224 de la tête d'aiguilletage 222, aux moyens de découpe 228, 230 de la nappe fibreuse, et aux moyens d'évacuation 302, 304 de la structure textile. Ces moyens de commande centrale permettent d'assurer la commande et la synchronisation nécessaires à l'obtention d'un processus d'aiguilletage continu.It should be noted that central control means (not shown in the figures) are connected to the motors 118a, 118b of the curved conveyor portions of the feed table, to the motion transmission means 226 of the support plate 202 of the table of needling, to the geared motor assemblies 206 of the pairs of tapered rollers 204 driving in rotation of the fibrous web, to the displacement means 224 of the needling head 222, to the cutting means 228, 230 of the fibrous web , and the evacuation means 302, 304 of the textile structure. These central control means make it possible to ensure the control and the synchronization necessary for obtaining a continuous needling process.

Claims (10)

  1. A circular needling machine (10) for needling a textile structure formed from a helical fiber sheet, the machine comprising a needling table (200) disposed beneath a feed table (100) for feeding a helical fiber sheet for needling, the machine being characterized in that the feed table comprises a circular belt conveyor (102) for receiving thereon a helical fiber sheet (106) for needling, the conveyor being centered on a vertical axis (104) and having a radial slot (120) opening out under the circular conveyor to unwind continuously the fiber sheet received on the conveyor, the slot opening out under the conveyor towards a substantially straight chute (400) that extends vertically between the conveyor and a support tray (202) of the needling table centered on the vertical axis of the conveyor so as to take up the sheet unwound from the conveyor and bring it onto the needling table, said support tray having means (204, 206) for driving the fiber sheet in rotation about the vertical axis.
  2. A machine according to claim 1, wherein the needling table (200) further includes a guide tray (208) centered on the vertical axis and movable vertically relative to the support tray (202) between a low, operating position in which it rests on said support tray, and a raised, disengaged position in which it is positioned above said support tray.
  3. A machine according to claim 2, wherein the chute (400) has one portion (400a) secured to the feed table (100) and another portion (400b) secured to the guide tray (208) of the needling table, these portions being suitable for moving in translation one inside the other during the vertical movements of the guide tray.
  4. A machine according to any one of claims 1 to 3, wherein the means for driving the fiber sheet in rotation comprise two pairs of conical rollers (204) that are angularly spaced apart from each other and that are designed to come into contact with the fiber sheet brought onto the needling table.
  5. A machine according to any one of claims 1 to 4, further comprising a conical presser roller (220) secured to the guide tray (208) of the needling table and placed at the outlet from the chute (400).
  6. A machine according to any one of claims 1 to 5, wherein the feed table (100) further includes a roller (124) placed under the circular conveyor (102) and angularly interposed between the slot (120) and the inlet (402) of the chute so as to enable a free end of the sheet being unwound from the conveyor to be taken up and guided towards the chute.
  7. A machine according to any one of claims 1 to 6, further including means for removing the textile structure (214) from the support tray (202) of the needling table.
  8. A machine according to claim 7, wherein the means for removing the textile structure comprise a manipulator arm (302) provided with a hinged finger (304) for taking hold of and removing the textile structure (214).
  9. A machine according to any one of claims 1 to 8, wherein the needling table (200) further comprises cutter means (228, 230) for cutting the fiber sheet.
  10. A machine according to any one of claims 1 to 9, wherein the circular conveyor of the feed table (100) has two curved conveyor portions (102a, 102b), each in the form of a half-disk and disposed facing the other, the slot being formed by a gap left between the two conveyor portions.
EP10195878.3A 2009-12-22 2010-12-20 Circular needling machine whereby a fibrous web is supplied by means of a conveyor and a vertical chute Active EP2339055B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0959406A FR2954357B1 (en) 2009-12-22 2009-12-22 CIRCULAR FILLING MACHINE WITH FIBROUS TABLET FEED BY A CONVEYOR AND A VERTICAL CHUTE

Publications (2)

Publication Number Publication Date
EP2339055A1 EP2339055A1 (en) 2011-06-29
EP2339055B1 true EP2339055B1 (en) 2013-12-18

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EP10195878.3A Active EP2339055B1 (en) 2009-12-22 2010-12-20 Circular needling machine whereby a fibrous web is supplied by means of a conveyor and a vertical chute

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US (1) US8375536B2 (en)
EP (1) EP2339055B1 (en)
JP (1) JP5792456B2 (en)
KR (1) KR20110073260A (en)
CN (1) CN102115956B (en)
BR (1) BRPI1010374A2 (en)
CA (1) CA2725352A1 (en)
FR (1) FR2954357B1 (en)
MX (1) MX2010014048A (en)
RU (1) RU2010151861A (en)
TW (1) TW201135000A (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110275266A1 (en) * 2010-05-05 2011-11-10 Goodrich Corporation System and method for textile positioning
FR3007043B1 (en) * 2013-06-13 2015-07-03 Messier Bugatti Dowty NEEDLE DRIVE DEVICE FOR A FIBROUS HELICOIDAL TABLET NEEDLED
FR3007428B1 (en) * 2013-06-20 2015-10-16 Messier Bugatti Dowty TABLE AND METHOD FOR NEEDLING A TEXTILE STRUCTURE FORMED FROM AN ANNIBLE FIBROUS PREFORM WITH RADIAL OFFSET OF THE NEEDLE HEAD
US10406798B2 (en) 2014-03-31 2019-09-10 Goodrich Corporation Method to transport and lay down dry fiber bundles
US9719199B2 (en) 2014-05-23 2017-08-01 Goodrich Corporation System and method for transport of fibers to/from a circular needle-punching loom
US9644296B2 (en) 2014-11-03 2017-05-09 Goodrich Corporation System and method for manufacturing net shape preform from textile strips
FR3070695B1 (en) 2017-09-01 2019-09-13 Safran Landing Systems GUIDE TOOLING FOR A CIRCULAR NEEDLE-CUTTING TABLE OF A TEXTILE STRUCTURE FORMED FROM A HELICOIDAL FIBROUS TABLET
FR3070696B1 (en) 2017-09-01 2019-09-13 Safran Landing Systems METHOD OF FORMING BY NEEDLETING AN ANNULAR TEXTILE PREFORM FROM A HELICOIDAL FIBROUS TABLET AND MACHINE FOR CARRYING OUT SAID METHOD
FR3072693B1 (en) * 2017-10-20 2020-11-06 Safran Landing Systems FEED REGULATION PROCESS AND MACHINE FOR CIRCULAR NEEDLETING OF A TEXTILE STRUCTURE FORMED FROM A HELICOIDAL FIBROUS TABLECLOTH
CN113969466A (en) * 2021-10-29 2022-01-25 西安美兰德新材料有限责任公司 Special needling machine for processing crucible support prefabricated body
CN116714271B (en) * 2023-08-11 2023-11-21 山东鲁嘉机械科技有限责任公司 Foam board needling machine

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FR2741634B1 (en) * 1995-11-27 1998-04-17 Europ Propulsion PROCESS FOR THE REALIZATION OF FIBROUS PREFORMS INTENDED FOR THE MANUFACTURE OF ANNULAR PIECES IN COMPOSITE MATERIAL
US6248417B1 (en) * 1997-09-08 2001-06-19 Cytec Technology Corp. Needled near netshape carbon preforms having polar woven substrates and methods of producing same
FR2824085B1 (en) * 2001-04-30 2003-08-01 Messier Bugatti CIRCULAR NEEDLE MACHINE PROVIDED WITH AN AUTOMATIC PREFORM DEVICE
FR2824084B1 (en) * 2001-04-30 2003-08-01 Messier Bugatti NEEDLE FEEDER BY CONTINUOUS SPIRAL BAND
FR2839985B1 (en) * 2002-05-23 2004-08-20 Messier Bugatti PROCESS AND PLANT FOR THE MANUFACTURE OF ANNULAR FIBROUS PREFORMS
FR2869330B1 (en) * 2004-04-23 2006-07-21 Messier Bugatti Sa PROCESS FOR PRODUCING TWO-DIMENSIONAL HELICOIDAL FIBROUS TABLET
FR2892428B1 (en) * 2005-10-24 2008-02-08 Messier Bugatti Sa FABRICATION OF THREE-DIMENSIONAL FIBROUS ANNULAR STRUCTURES

Also Published As

Publication number Publication date
RU2010151861A (en) 2012-06-27
EP2339055A1 (en) 2011-06-29
US8375536B2 (en) 2013-02-19
JP2011132655A (en) 2011-07-07
FR2954357B1 (en) 2012-03-23
JP5792456B2 (en) 2015-10-14
US20110154628A1 (en) 2011-06-30
KR20110073260A (en) 2011-06-29
FR2954357A1 (en) 2011-06-24
CN102115956A (en) 2011-07-06
BRPI1010374A2 (en) 2016-09-06
TW201135000A (en) 2011-10-16
CA2725352A1 (en) 2011-06-22
CN102115956B (en) 2014-12-24
MX2010014048A (en) 2011-06-24

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