EP1397546B1 - Circular needling loom with smooth table - Google Patents

Circular needling loom with smooth table Download PDF

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Publication number
EP1397546B1
EP1397546B1 EP20020727701 EP02727701A EP1397546B1 EP 1397546 B1 EP1397546 B1 EP 1397546B1 EP 20020727701 EP20020727701 EP 20020727701 EP 02727701 A EP02727701 A EP 02727701A EP 1397546 B1 EP1397546 B1 EP 1397546B1
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EP
European Patent Office
Prior art keywords
needling
circular
annular preform
preform
machine according
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EP20020727701
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German (de)
French (fr)
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EP1397546A1 (en
Inventor
Renaud Duval
Thierry Marjollet
Robert Jean
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Safran Landing Systems SAS
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Messier Bugatti 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
    • 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/48—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
    • 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
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres

Definitions

  • the present invention relates to the field of needled textile structures and more particularly relates to a needling machine circular type.
  • Circular needling machines are now well known, as shown, for example, by patent applications. FR 2 626 294 or EP 0 849 389 .
  • the needling of the textile structure is obtained by a relative angular rotation between a horizontal support plate of this structure and a needling head having an alternating vertical movement.
  • the support plate is rotated and the needling head is fixed.
  • this plate is covered with a material for needling, such as a succession of polypropylene fiber felt fibers bonded together. by gluing or sewing (see for example the request EP 0 232 059 ) or a set of carpet-brushes ( EP 0 849 389 ).
  • the present invention therefore proposes to overcome these disadvantages with a circular needling machine of a new type which allows the production of annular preforms of particularly homogeneous structure.
  • An object of the invention is also to provide a machine well suited to the needling of textile structures formed of brittle fibers, especially carbon fibers.
  • a circular type needling machine formed from a fibrous texture material needling, comprising a vertically movable needling table and serving as a horizontal support to said annular preform, a needling head comprising a given number of barbed needles disposed vertically above said needling table in a needling zone and animated by a vertical reciprocating movement, characterized in that said annular preform is placed on the same table needling and is rotated on said needling table by drive means, said needling table remaining stationary during this rotation.
  • the drive means of the annular preform comprise a set of conical friction rollers held in continuous contact with the annular preform.
  • This set of conical friction rollers preferably comprises three rollers advantageously arranged at 120 ° and each actuated by an independent geared motor unit.
  • the needling table comprises a plurality of localized perforations for receiving said barbed needles during the first needling passes and is preferably coated with a slip material (anti-friction).
  • the needling table forms the upper wall of a suction box intended for the evacuation of fiber residues.
  • the needling machine according to the invention may further comprise at least one conical counter-roller disposed in an opening of said needling table and intended to cooperate with at least one of said conical drive rollers.
  • this counter-roller is free mounted.
  • the present invention also relates to the needling process used in the aforementioned circular needling machine.
  • FIG. figure 1 A circular needling machine according to the invention is illustrated in FIG. figure 1 very schematically.
  • annular textile layers or layers are stacked and needled on a tray to form a needled fibrous preform of annular shape.
  • These layers can be formed beforehand by rings or sectors of juxtaposed rings cut in a fabric or nonwoven of unidirectional or multidirectional fibers. They can also be formed by coils wound flat from a feed device such as that described in the application filed by the Applicant the same day and entitled "needling machine equipped with an automatic feeding device", or turns formed from deformed braids, or turns formed from a deformable two-dimensional texture.
  • the annular preform 10 which may in particular constitute a brake disk preform of composite material, rests directly on a plate 12 forming a needling table. It is rotated and passes a needling station comprising a needle board 14 which overhangs a given sector of the needling table (whose location is delimited by dashed lines on the figure 2 ).
  • the needle board is reciprocated transversely relative to the plate by means of a drive device 16 of the crank-handle type.
  • the needles 140 carried by this needle board are provided with barbs, hooks or forks to collect fibers in the stacked layers and transfer them through them when they enter the annular preform.
  • the needling table 12 comprises a series of perforations 120 located at the level of the needle board and made opposite each needle for the passage thereof during the needling of the first layers of the annular preform. At each needling of a new textile layer, the needling table is moved vertically, by means of motor means 18, with a determined step of descent corresponding to the thickness of a needled strand.
  • the rotary drive of the annular preform 10 is effected by means of a set of conical rollers 20a, 20b, 20c coated with a friction material, such as polyurethane or other synthetic rubber, and kept in continuous contact with the annular preform.
  • this assembly comprises three conical friction rollers arranged at 120 ° and each actuated by an independent geared motor group 22a, 22b, 22c.
  • a common drive coupled to a suitable kinematics could of course also be considered.
  • the drive means further comprise at least one conical counter-roller 24, preferably free mounted, and disposed in an opening 122 of the needling table 12 facing a conical driving roller (for example 20a ) with which it is intended to cooperate.
  • this counter-roller can also be driven at the same speed as the drive pressure roller which faces it.
  • This sandwich arrangement of the annular preform between pressure roller (driven) and against-roller (free or possibly driven) allows a better drive, especially when the preform is large diameter.
  • the perforated needling table 12 is placed on a suction box 26 which it forms the upper wall, the lower wall of this box being provided with an exhaust port 260 connected to a conventional suction device (not shown) responsible for collecting the fiber residues sucked.
  • a suction box 26 which it forms the upper wall, the lower wall of this box being provided with an exhaust port 260 connected to a conventional suction device (not shown) responsible for collecting the fiber residues sucked.
  • the numerous disadvantages resulting from the use of a turntable covered with a carpet-brush or layers of felt are eliminated: the difficulty of adhesion of the first layers is eliminated, the difficulty of evacuation of the preform once needled is also removed, but also and especially the lack of perfect control of the position of the upper surface of the preform, due to the bending of the brush or felt as the needling , is avoided.
  • the knowledge of this position, a guarantee of perfect control of the penetration of the needles is an essential element of the needling process to ensure the production of annular preforms with uniform dimensional characteristics, as shown in the French patent application N ° 01 02869 on behalf of the Applicant entitled "needling machine with a penetration measuring device".

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Finger-Pressure Massage (AREA)
  • Knitting Machines (AREA)
  • Woven Fabrics (AREA)
  • Preliminary Treatment Of Fibers (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

In a circular needling machine for needling an annular preform and comprising both a vertically movable needling table serving as a horizontal support for said annular preform, and a needling head having a determined number of barbed needles disposed over the needling table in a needling zone and driven with vertical reciprocating motion, provision is made for the annular preform to be placed directly on the needling table and for it to be driven in rotation on the needling table by drive means while the needling table remains rotationally stationary during said rotation. The drive means comprise a set of conical friction rollers kept continuously in contact with the annular preform.

Description

Domaine de l'inventionField of the invention

La présente invention se rapporte au domaine des structures textiles aiguilletées et elle concerne plus particulièrement une machine d'aiguilletage de type circulaire.The present invention relates to the field of needled textile structures and more particularly relates to a needling machine circular type.

Art antérieurPrior art

Les machines d'aiguilletage de type circulaire sont aujourd'hui bien connues, comme le montre par exemple les demandes de brevet FR 2 626 294 ou EP 0 849 389 . Dans ces machines traditionnelles, l'aiguilletage de la structure textile est obtenue par une rotation angulaire relative entre un plateau horizontal support de cette structure et une tête d'aiguilletage ayant un mouvement vertical alternatif. En général, du fait du mouvement alternatif de la tête, c'est le plateau support qui est tournant et la tête d'aiguilletage qui est fixe. En outre, afin de maintenir la préforme sur le plateau lors de sa rotation et de lui garantir un ancrage suffisant, ce plateau est recouvert d'un matériau permettant l'aiguilletage, tel qu'une succession de feutres de fibres en polypropylène liés entre eux par collage ou couture (voir par exemple la demande EP 0 232 059 ) ou un ensemble de tapis-brosses ( EP 0 849 389 ).Circular needling machines are now well known, as shown, for example, by patent applications. FR 2 626 294 or EP 0 849 389 . In these traditional machines, the needling of the textile structure is obtained by a relative angular rotation between a horizontal support plate of this structure and a needling head having an alternating vertical movement. In general, because of the reciprocating movement of the head, the support plate is rotated and the needling head is fixed. In addition, in order to maintain the preform on the plate during its rotation and to guarantee sufficient anchoring, this plate is covered with a material for needling, such as a succession of polypropylene fiber felt fibers bonded together. by gluing or sewing (see for example the request EP 0 232 059 ) or a set of carpet-brushes ( EP 0 849 389 ).

Cette configuration de machines circulaires comportant un plateau à brosses (ou feutres) présente malheureusement de nombreux inconvénients. Tout d'abord, la difficulté d'adhérisation des premières couches de la préforme oblige généralement à un sur-aiguilletage qui, outre qu'il modifie la densité d'aiguilletage de la préforme au niveau de ces premières couches, pose un problème lors du retrait de cette préforme qui doit être arrachée à la brosse ou évacuée avec le feutre. Ensuite, lorsque les fibres à aiguilletées sont d'un type cassant tel le carbone, il se produit une pollution particulièrement importante de la brosse qui exige un nettoyage fréquent sous peine de provoquer un encrassement de la machine préjudiciable à la formation de la préforme. Enfin, la souplesse procurée par la présence de la brosse ou du feutre, en provoquant un écrasement allant croissant avec l'augmentation de l'épaisseur de la préforme, interdit une connaissance exacte de la position de la surface supérieure de cette préforme et donc une bonne maîtrise de la pénétration des aiguilles.This configuration of circular machines with a brush tray (or felts) has unfortunately many disadvantages. Firstly, the difficulty of adhering the first layers of the preform generally forces over-needling which, in addition to modifying the needling density of the preform at these first layers, poses a problem during the withdrawal of this preform which must be pulled off the brush or discharged with the felt. Then, when the needled fibers are of a brittle type such as carbon, there is a particularly significant pollution of the brush which requires frequent cleaning or risk of fouling the machine prejudicial to the formation of the preform. Finally, the flexibility provided by the presence of the brush or felt, causing a crushing increasing with the increase in the thickness of the preform, prohibits an exact knowledge of the position of the upper surface of this preform and therefore a good control of the penetration of the needles.

Objet et définition de l'inventionObject and definition of the invention

La présente invention propose donc de pallier ces inconvénients avec une machine d'aiguilletage circulaire d'un type nouveau qui permet la réalisation de préformes annulaires de structure particulièrement homogène. Un but de l'invention est aussi de proposer une machine bien adaptée à l'aiguilletage de structures textiles formées de fibres cassantes, notamment de fibres de carbone.The present invention therefore proposes to overcome these disadvantages with a circular needling machine of a new type which allows the production of annular preforms of particularly homogeneous structure. An object of the invention is also to provide a machine well suited to the needling of textile structures formed of brittle fibers, especially carbon fibers.

Ces buts sont atteints par une machine d'aiguilletage de type circulaire formée à partir d'une texture fibreuse de matière à aiguilleter, comportant une table d'aiguilletage mobile verticalement et servant de support horizontal à ladite préforme annulaire, une tête d'aiguilletage comprenant un nombre déterminé d'aiguilles à barbes, disposée à l'aplomb de ladite table d'aiguilletage dans une zone d'aiguilletage, et animée d'un mouvement alternatif vertical, caractérisée en ce que ladite préforme annulaire est posée à même ladite table d'aiguilletage et est entraînée en rotation sur ladite table d'aiguilletage par des moyens d'entraînement, ladite table d'aiguilletage restant fixe pendant cette rotation.These objects are achieved by a circular type needling machine formed from a fibrous texture material needling, comprising a vertically movable needling table and serving as a horizontal support to said annular preform, a needling head comprising a given number of barbed needles disposed vertically above said needling table in a needling zone and animated by a vertical reciprocating movement, characterized in that said annular preform is placed on the same table needling and is rotated on said needling table by drive means, said needling table remaining stationary during this rotation.

Avec cette structure révolutionnaire de machine d'aiguilletage circulaire à plateau ou table « lisse », il devient possible réaliser des préformes annulaires présentant une densité d'aiguilletage uniforme dans toute l'épaisseur de la préforme et dont les différentes couches présentent une épaisseur constante.With this revolutionary structure of circular needle punching machine or "smooth" table, it becomes possible to achieve annular preforms having a uniform needling density throughout the thickness of the preform and whose different layers have a constant thickness.

Selon un mode de réalisation préférentiel, les moyens d'entraînement de la préforme annulaire comportent un ensemble de rouleaux de friction coniques maintenus en contact continu avec la préforme annulaire. Cet ensemble de rouleaux de friction coniques comporte de préférence trois rouleaux disposés avantageusement à 120° et chacun actionnés par un groupe moto-réducteur indépendant.According to a preferred embodiment, the drive means of the annular preform comprise a set of conical friction rollers held in continuous contact with the annular preform. This set of conical friction rollers preferably comprises three rollers advantageously arranged at 120 ° and each actuated by an independent geared motor unit.

La table d'aiguilletage comporte une pluralité de perforations localisées pour recevoir lesdites aiguilles à barbes lors des premières passes d'aiguilletage et elle est, de préférence, revêtue d'un matériau de glissement (anti-friction).The needling table comprises a plurality of localized perforations for receiving said barbed needles during the first needling passes and is preferably coated with a slip material (anti-friction).

Selon un mode de réalisation avantageux plus particulièrement adapté à la réalisation de préformes à base de fibres cassantes, la table d'aiguilletage forme la paroi supérieure d'un caisson d'aspiration destiné à l'évacuation de résidus de fibres.According to an advantageous embodiment more particularly adapted to the production of preforms based on brittle fibers, the needling table forms the upper wall of a suction box intended for the evacuation of fiber residues.

La machine d'aiguilletage selon l'invention peut comporter en outre au moins un contre-rouleau conique disposé dans une ouverture de ladite table d'aiguilletage et destiné à coopérer avec l'un au moins desdits rouleaux coniques d'entraînement. De préférence, ce contre-rouleau est monté libre.The needling machine according to the invention may further comprise at least one conical counter-roller disposed in an opening of said needling table and intended to cooperate with at least one of said conical drive rollers. Preferably, this counter-roller is free mounted.

La présente invention concerne également le procédé d'aiguilletage mis en oeuvre dans la machine d'aiguilletage circulaire précitée.The present invention also relates to the needling process used in the aforementioned circular needling machine.

Brève description des dessinsBrief description of the drawings

Les caractéristiques et avantages de la présente invention ressortiront mieux de la description suivante, faite à titre indicatif et non limitatif, en regard des dessins annexés sur lesquels :

  • la figure 1 est une vue schématique en élévation d'une machine d'aiguilletage circulaire selon l'invention,
  • la figure 2 est une vue de dessus de la machine d'aiguilletage circulaire de la figure 1 montrant les moyens d'entraînement de la structure textile à aiguilleter, et
  • la figure 3 montre une variante de réalisation des moyens d'entraînement de la structure textile à aiguilleter.
The features and advantages of the present invention will emerge more clearly from the following description, given by way of non-limiting indication, with reference to the appended drawings in which:
  • the figure 1 is a schematic elevational view of a circular needling machine according to the invention,
  • the figure 2 is a top view of the circular needling machine from the figure 1 showing the drive means of the textile structure to be pointed, and
  • the figure 3 shows an alternative embodiment of the drive means of the textile structure needling.

Description détaillée d'un mode de réalisation préférentielDetailed description of a preferred embodiment

Une machine d'aiguilletage circulaire selon l'invention est illustrée à la figure 1 de façon très schématique.A circular needling machine according to the invention is illustrated in FIG. figure 1 very schematically.

Classiquement, dans un processus d'aiguilletage circulaire, des strates ou couches textiles annulaires sont empilées et aiguilletées sur un plateau pour former une préforme fibreuse aiguilletée de forme annulaire. Ces strates peuvent être formées préalablement par des anneaux ou des secteurs d'anneaux juxtaposés découpés dans un tissu ou un non tissé de fibres unidirectionnelles ou multidirectionnelles. Elles peuvent aussi être formées par des spires enroulées à plat à partir d'un dispositif d'alimentation tel que celui décrit dans la demande déposée par la demanderesse le même jour et intitulée «machine d'aiguilletage munie d'un dispositif d'alimentation automatique», ou des spires formées à partir de tresses déformées, ou encore des spires formées à partir d'une texture bidimensionnelle déformable.Conventionally, in a circular needling process, annular textile layers or layers are stacked and needled on a tray to form a needled fibrous preform of annular shape. These layers can be formed beforehand by rings or sectors of juxtaposed rings cut in a fabric or nonwoven of unidirectional or multidirectional fibers. They can also be formed by coils wound flat from a feed device such as that described in the application filed by the Applicant the same day and entitled "needling machine equipped with an automatic feeding device", or turns formed from deformed braids, or turns formed from a deformable two-dimensional texture.

La préforme annulaire 10, qui peut notamment constituer une préforme de disque de frein en matériau composite, repose directement sur un plateau 12 formant table d'aiguilletage. Elle est entraînée en rotation et passe devant un poste d'aiguilletage comprenant une planche à aiguilles 14 qui surplombe un secteur déterminé de la table d'aiguilletage (dont l'emplacement est délimité par des traits pointillés sur la figure 2).The annular preform 10, which may in particular constitute a brake disk preform of composite material, rests directly on a plate 12 forming a needling table. It is rotated and passes a needling station comprising a needle board 14 which overhangs a given sector of the needling table (whose location is delimited by dashed lines on the figure 2 ).

La planche à aiguilles est animée d'un mouvement alternatif en direction transversale par rapport au plateau au moyen d'un dispositif d'entraînement 16 de type bielle-manivelle. Les aiguilles 140 portées par cette planche à aiguilles sont munies de barbes, crochets ou fourches pour prélever des fibres dans les strates empilées et les transférer à travers celles-ci lorsqu'elles pénètrent dans la préforme annulaire. La table d'aiguilletage 12 comporte une série de perforations 120 localisées au niveau de la planche à aiguilles et pratiquées en regard de chaque aiguille pour le passage de celles-ci lors de l'aiguilletage des premières strates de la préforme annulaire. A chaque aiguilletage d'une nouvelle strate textile, la table d'aiguilletage est déplacée verticalement, par l'intermédiaire de moyens moteur 18, d'un pas de descente déterminé correspondant à l'épaisseur d'une strate aiguilletée.The needle board is reciprocated transversely relative to the plate by means of a drive device 16 of the crank-handle type. The needles 140 carried by this needle board are provided with barbs, hooks or forks to collect fibers in the stacked layers and transfer them through them when they enter the annular preform. The needling table 12 comprises a series of perforations 120 located at the level of the needle board and made opposite each needle for the passage thereof during the needling of the first layers of the annular preform. At each needling of a new textile layer, the needling table is moved vertically, by means of motor means 18, with a determined step of descent corresponding to the thickness of a needled strand.

Selon l'invention, et comme l'illustre la figure 2, l'entraînement en rotation de la préforme annulaire 10 est réalisé au moyen d'un ensemble de rouleaux coniques 20a, 20b, 20c revêtus d'un matériau de friction, tel le polyuréthane ou tout autre caoutchouc synthétique, et maintenus en contact continu avec la préforme annulaire. De préférence, cet ensemble comporte trois rouleaux de friction coniques disposés à 120° et chacun actionnés par un groupe moto-réducteur indépendant 22a, 22b, 22c. Toutefois, une motorisation commune accouplée à une cinématique adaptée pourrait bien entendu être aussi envisagée.According to the invention, and as illustrated by figure 2 the rotary drive of the annular preform 10 is effected by means of a set of conical rollers 20a, 20b, 20c coated with a friction material, such as polyurethane or other synthetic rubber, and kept in continuous contact with the annular preform. Preferably, this assembly comprises three conical friction rollers arranged at 120 ° and each actuated by an independent geared motor group 22a, 22b, 22c. However, a common drive coupled to a suitable kinematics could of course also be considered.

Avec cette configuration particulière dans laquelle la préforme annulaire repose à même la table d'aiguilletage (c'est à dire directement sur cette table sans aucun élément intermédiaire), le problème posé par l'évacuation de cette préforme qui, dans l'art antérieur, supposait l'arrachement de la préforme au tapis-brosse ou au feutre de fibres en polypropylène solidarisé préalablement à la table d'aiguilletage peut être facilement résolu. La demanderesse dans sa demande intitulée « machine d'aiguilletage munie d'un dispositif d'évacuation automatique» et déposée le même jour a ainsi décrit un dispositif d'évacuation de préformes particulièrement adapté à une telle configuration de machine d'aiguilletage circulaire qui peut être qualifiée de machine à plateau ou table « lisse ». Cette faculté de glissement sur la table peut être renforcée en recouvrant cette table d'un matériau anti-friction tel le téflon@. De plus, la difficulté d'adhérisation des premières couches dans les machines d'aiguilletage de l'art antérieur, qui impliquait obligatoirement un sur-aiguilletage de ces premières couches, est aussi supprimée.With this particular configuration in which the annular preform rests on the same needling table (ie directly on this table without any intermediate element), the problem posed by the evacuation of this preform which, in the prior art, involved the removal of the preform from the carpet or the felt of polypropylene fibers previously secured to the needling table can be easily solved. The applicant in his application entitled "needling machine equipped with an automatic evacuation device" and filed on the same day has thus described a preform evacuation device particularly suitable for such a configuration of circular needling machine which can be qualified as a "flat" table or table machine. This sliding ability on the table can be enhanced by covering this table with an anti-friction material such as Teflon®. In addition, the difficulty of adhering the first layers in needling machines of the prior art, which necessarily involved over-needling of these first layers, is also removed.

Dans une variante de réalisation illustrée à la figure 3, les moyens d'entraînement comportent en outre au moins un contre-rouleau conique 24, de préférence monté libre, et disposé dans une ouverture 122 de la table d'aiguilletage 12 en regard d'un rouleau conique d'entraînement (par exemple 20a) avec lequel il est destiné à coopérer. Dans une variante, ce contre-rouleau peut aussi être entraîné à la même vitesse que le rouleau presseur d'entraînement qui lui fait face. Cette disposition en sandwich de la préforme annulaire entre rouleau presseur (entraîné) et contre-rouleau (libre ou éventuellement entraîné) permet un meilleur entraînement, notamment lorsque cette préforme est de diamètre important. De plus, pour les très grands diamètres, il peut être en outre avantageux d'associer un contre-rouleau à chaque rouleau d'entraînement.In an embodiment variant illustrated in figure 3 , the drive means further comprise at least one conical counter-roller 24, preferably free mounted, and disposed in an opening 122 of the needling table 12 facing a conical driving roller (for example 20a ) with which it is intended to cooperate. In a variant, this counter-roller can also be driven at the same speed as the drive pressure roller which faces it. This sandwich arrangement of the annular preform between pressure roller (driven) and against-roller (free or possibly driven) allows a better drive, especially when the preform is large diameter. In addition, for very large diameters, it may be further advantageous to associate a counter-roller with each drive roller.

Dans le cas d'une utilisation de fibres de carbone pour la réalisation de la préforme annulaire 10, il est intéressant de procéder pendant l'aiguilletage à une aspiration des résidus de fibres. En effet, ce type de fibre présente une nature cassante génératrice de résidus importants qu'il convient d'évacuer sous peine d'encrasser la machine. Pour cela, la table d'aiguilletage perforée 12 est posée sur un caisson d'aspiration 26 dont elle forme la paroi supérieure, la paroi inférieure de ce caisson étant pourvue d'un orifice d'évacuation 260 relié à un dispositif conventionnel d'aspiration (non représenté) chargé de recueillir les résidus de fibres aspirés. Dans le cadre de cette utilisation, et lorsqu'ils existent, le ou les contre-rouleaux disposés dans le ou les ouvertures correspondantes de la table d'aiguilletage sont bien entendu munis d'un capotage pour assurer l'étanchéité vis à vis de ce dispositif d'aspiration.In the case of a use of carbon fibers for the production of the annular preform 10, it is advantageous to proceed during needling to an aspiration of the fiber residues. Indeed, this type of fiber has a brittle nature generating significant residues that should be evacuated under penalty of fouling the machine. For this, the perforated needling table 12 is placed on a suction box 26 which it forms the upper wall, the lower wall of this box being provided with an exhaust port 260 connected to a conventional suction device (not shown) responsible for collecting the fiber residues sucked. As part of this use, and when exist, or against the rollers arranged in the corresponding openings or the needling table are of course provided with a cowling for sealing against this suction device.

Avec la présente invention, les nombreux inconvénients résultant de l'utilisation d'un plateau tournant recouvert d'un tapis-brosse ou de couches de feutre sont éliminés : la difficulté d'adhérisation des premières strates est supprimée, la difficulté d'évacuation de la préforme une fois aiguilletée est également supprimée, mais aussi et surtout l'absence d'une parfaite maîtrise de la position de la surface supérieure de la préforme, due au fléchissement de la brosse ou du feutre au fur et à mesure de l'aiguilletage, est évitée. Or, la connaissance de cette position, gage d'un parfait contrôle de la pénétration des aiguilles, est un élément essentiel du processus d'aiguilletage pour garantir la réalisation de préformes annulaires aux caractéristiques dimensionnelles uniformes, comme le montre la demande de brevet française N° 01 02869 au nom de la demanderesse intitulée « machine d'aiguilletage munie d'un dispositif de mesure de pénétration».With the present invention, the numerous disadvantages resulting from the use of a turntable covered with a carpet-brush or layers of felt are eliminated: the difficulty of adhesion of the first layers is eliminated, the difficulty of evacuation of the preform once needled is also removed, but also and especially the lack of perfect control of the position of the upper surface of the preform, due to the bending of the brush or felt as the needling , is avoided. However, the knowledge of this position, a guarantee of perfect control of the penetration of the needles, is an essential element of the needling process to ensure the production of annular preforms with uniform dimensional characteristics, as shown in the French patent application N ° 01 02869 on behalf of the Applicant entitled "needling machine with a penetration measuring device".

Claims (13)

  1. A circular needling machine for needling an annular preform made from a fiber fabric of material to be needled, the machine comprising a vertically movable needing table (12) serving as a horizontal support for said annular preform (10), and a needling head (14) comprising a determined number of barbed needles (140) overlying a needling zone of said needling table and driven with vertical reciprocating motion, the machine being characterized in that said annular preform is placed directly on said needling table and is driven in rotation on said needling table by drive means (20a, 20b, 20c; 24), said needling table remaining rotationally stationary during said rotation.
  2. A circular needling machine according to claim 1, characterized in that said drive means for the annular preform comprise a set of conical friction rollers (20a, 20b, 20c) kept continuously in contact with said annular preform.
  3. A circular needling machine according to claim 2, characterized in that said set of conical friction rollers comprises three rollers mutually disposed at about 120°.
  4. A circular needling machine according to claim 3, characterized in that each of said conical friction rollers is actuated by an independent motor and gear box unit (22a, 22b, 22c).
  5. A circular needling machines according to claim 1 or claim 2, characterized in that said needling table comprises a plurality of localized perforations (120) for receiving said barbed needles during the first needling passes.
  6. A circular needling machine according to claim 1 or claim 2, characterized in that said needling table is coated in an anti-friction material.
  7. A circular needling machine according to claim 1 or claim 2, characterized in that said needling table forms the top wall of a suction box (26) for removing fiber residues.
  8. A circular needling machine according to claim 1 or claim 2, characterized in that it further comprises at least one conical backing roller (24) placed in an opening (122) in said needling table and designed to cooperate with at least one (20a) of said conical drive rollers.
  9. A circular needling machine according to claim 8, characterized in that said conical backing roller is mounted idle.
  10. A method of circularly needling an annular preform, the method being of the type using a vertically movable needling table (12) serving as a horizontal support for said annular preform (10) and a needling head (14) having a determined number of barbed needles (140) occupying a needling zone over said needling table and driven with vertical reciprocating motion, in which method said annular preform is placed directly on said needling table and is driven in rotation by drive means with said needling table remaining rotationally stationary during said rotation.
  11. A needing method according to claim 10, characterized in that said drive means for diving the annular preform comprise a set of conical friction rollers (20a, 20b, 20c) kept continuously in contact with the annular preform.
  12. A needling method according to claim 11, characterized in that said set of conical friction rollers comprised three rollers mutually disposed at about 120°.
  13. A needling method according to claim 10, characterized in that said needling table is coated in an anti-friction material.
EP20020727701 2001-04-30 2002-04-26 Circular needling loom with smooth table Expired - Lifetime EP1397546B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0105798A FR2824086B1 (en) 2001-04-30 2001-04-30 SMOOTH TABLE CIRCULAR NEEDLE MACHINE
FR0105798 2001-04-30
PCT/FR2002/001456 WO2002088451A1 (en) 2001-04-30 2002-04-26 Circular needling loom with smooth table

Publications (2)

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EP1397546A1 EP1397546A1 (en) 2004-03-17
EP1397546B1 true EP1397546B1 (en) 2011-06-08

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US (1) US6367130B1 (en)
EP (1) EP1397546B1 (en)
JP (1) JP4128876B2 (en)
KR (1) KR100805421B1 (en)
CN (1) CN1312341C (en)
AT (1) ATE512244T1 (en)
BR (1) BR0209322A (en)
CA (1) CA2445986C (en)
FR (1) FR2824086B1 (en)
HU (1) HUP0304037A3 (en)
IL (2) IL158387A0 (en)
MX (1) MXPA03009882A (en)
RU (1) RU2283387C2 (en)
UA (1) UA75132C2 (en)
WO (1) WO2002088451A1 (en)

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FR2892428B1 (en) 2005-10-24 2008-02-08 Messier Bugatti Sa FABRICATION OF THREE-DIMENSIONAL FIBROUS ANNULAR STRUCTURES
DE102008026968A1 (en) * 2008-06-05 2009-12-24 Entwicklungsgesellschaft für Akustik (EfA) mit beschränkter Haftung Suede carpet with tufted surface
US8074330B2 (en) * 2008-08-13 2011-12-13 Goodrich Corporation Method and system for enabling z fiber transfer in needled preform
FR2954358B1 (en) 2009-12-23 2012-01-13 Messier Bugatti CIRCULAR CLAMPING TABLE FOR TEXTILE STRUCTURE FORMED FROM ANNIBLE FIBROUS PREFORM
US20110275266A1 (en) 2010-05-05 2011-11-10 Goodrich Corporation System and method for textile positioning
FR2968001B1 (en) * 2010-11-26 2015-11-20 Messier Bugatti METHOD FOR PRODUCING A THREE-DIMENSIONAL FIBROUS PREFORM FOR THE MANUFACTURE OF AN ANNULAR PIECE OF CARBON-CARBON COMPOSITE MATERIAL
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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
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US9850606B2 (en) 2015-03-27 2017-12-26 Goodrich Corporation System and method for multiple surface air jet needling
US10017887B2 (en) * 2016-03-22 2018-07-10 Goodrich Corporation System and method for multiple surface water jet needling
US10081892B2 (en) 2016-08-23 2018-09-25 Goodrich Corporation Systems and methods for air entanglement

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IL158387A0 (en) 2004-05-12
KR100805421B1 (en) 2008-02-20
JP4128876B2 (en) 2008-07-30
CA2445986A1 (en) 2002-11-07
FR2824086A1 (en) 2002-10-31
RU2003131882A (en) 2005-02-27
KR20040041543A (en) 2004-05-17
US6367130B1 (en) 2002-04-09
IL158387A (en) 2009-02-11
MXPA03009882A (en) 2004-02-17
CN1505714A (en) 2004-06-16
HUP0304037A3 (en) 2008-08-28
JP2004526881A (en) 2004-09-02
CN1312341C (en) 2007-04-25
FR2824086B1 (en) 2003-08-01
ATE512244T1 (en) 2011-06-15
BR0209322A (en) 2004-06-15
UA75132C2 (en) 2006-03-15
CA2445986C (en) 2007-08-14
HUP0304037A2 (en) 2004-04-28
EP1397546A1 (en) 2004-03-17
RU2283387C2 (en) 2006-09-10
WO2002088451A1 (en) 2002-11-07

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