EP1384804B1 - Process for limiting the fooling of a needling machine from flying fibers and a needle machine therefore - Google Patents

Process for limiting the fooling of a needling machine from flying fibers and a needle machine therefore Download PDF

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Publication number
EP1384804B1
EP1384804B1 EP03291659A EP03291659A EP1384804B1 EP 1384804 B1 EP1384804 B1 EP 1384804B1 EP 03291659 A EP03291659 A EP 03291659A EP 03291659 A EP03291659 A EP 03291659A EP 1384804 B1 EP1384804 B1 EP 1384804B1
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EP
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Prior art keywords
blowing
plate
air
needling machine
needles
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German (de)
French (fr)
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EP1384804A1 (en
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François LOUIS
Xavier Delassus
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Asselin Thibeau SAS
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Asselin Thibeau SAS
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    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04HMAKING 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
    • D04H18/00Needling machines
    • D04H18/02Needling machines with needles

Definitions

  • the present invention relates to a method for limiting the fouling of a needling machine by the flying fibers constituting the needling sheet, more particularly to limit the fouling of the needling and needling plates, and by extension of the needle boards.
  • the present invention also proposes a needling machine implementing this method.
  • a needling machine conventionally comprises at least one board, provided with a set of parallel needles, actuated back and forth in the longitudinal direction of the needles to repeatedly penetrate through a sheet of fibers so as to consolidate the sheet by interlacing the fibers that compose it.
  • the path of the fibers in the working zone of the needles is conventionally defined between two plates provided with perforations for the passage of the needles.
  • the plate on the side where the needles are when in the retracted position is referred to as the "stripping plate”. It serves to prevent the fiber web from being driven by the needles back into the retracted position.
  • the other plate used to prevent the web of fibers from being pushed by the tips of the needles, is called “needling plate”.
  • fibers may be more or less driven by the needles outside the two plates. These fibers tend to clog the needle passage holes in the plates and also to accumulate with time at the base of the needles forming a very hard mattress capable of deforming the stripping plate at the time of striking the needles.
  • the present invention proposes a solution to achieve this objective.
  • the document FR 2 541 324 describes needling cleaning means that can be implemented continuously with the machine running.
  • These means comprise a box formed under the needling table in the longitudinal direction of the machine.
  • worm-type means capable of mechanically evacuating the flying fibers to an outlet end of the box.
  • pneumatic means blowing an inlet port at one end of the box and a suction through an outlet conduit at the other end of the box.
  • the document US 5,148,584 discloses a needle board and an associated stripper to reduce the marking of the sheet due to needling step by step.
  • the board has areas in which the needles are tightened as much as possible in groups of rows.
  • the associated stripper has lights for the passage of entire sets of needles instead of individual needle holes. Transverse zones (relative to the movement of the sheet) are provided between the lights to ensure the mechanical strength of the stripper. In these transverse zones may be provided blow and / or suction lines.
  • the invention proposes a method according to claim 1, which differs from the documents FR 2 541 324 and US 5,148,584 in particular that it allows the blowing to be performed discontinuously to alternate blowing periods with periods of stopping.
  • the method according to the invention makes it possible to operate in jerks to unhook fibers, and may furthermore comprise a reconstitution with the aid of a booster, during periods of stopping, of a reserve of air under pressure. raised from an existing compressed air network.
  • High velocity air jets can typically be obtained by guiding air under pressure through orifices of small dimensions, for example in a discharge ramp supplied by a source of pressurized air.
  • the blowing can be carried out in different ways depending on the plate concerned and also depending on the type of machine (single or double strike and double needling vis-à-vis).
  • Means for managing the characteristics of the air flows to be produced and, where appropriate, the blowing periods may be provided.
  • the blowing is preferably carried out as close to the flush of the plates and horizontally.
  • the needling machine shown in FIG. 1 comprises a generally horizontal perforated needling plate 1 and a retaining plate 2, also called a "cleaning plate", placed approximately parallel to a certain distance above the plate 1.
  • the stripping plate 2 and the needling plate 1 define between them a path in a substantially horizontal plane for a ply of fibers 3.
  • the stripping plate 2 comprises perforations aligned with those of the plate 1.
  • means of introduction 4 schematically in the form of a pair of drive rollers between which passes the web 3.
  • the ply 3 consolidated and compacted by needling is driven by extractor means 6 also schematized by two motor rollers between which the web passes 3.
  • the stripping plate 2 is placed between the path of the sheet 3 and a needle board 7.
  • the board 7 bears on the side of the stripping plate 2 a large number of needles 8 oriented perpendicularly to the plane of the path of the sheet 3 , with their point directed towards the sheet 3.
  • Each needle is positioned in front of a perforation of the cleaning plate 2 and a corresponding perforation of the plate 1.
  • the needle board 7 is attached to a support beam 9 itself fixed to the end of at least one rod 11 slidably mounted along an axis 12, parallel to the needles 8 and perpendicular to the plane of the path of the web 3. If there are several rods 11, they are for example aligned one behind the other when viewed in the manner shown in Figure 1.
  • the moving equipment consisting of the sliding rod or rods 11, the support beam 9 and the board 7 is driven in service reciprocating back and forth in the direction 12 between a position 7a in which the end of the needles, designated in this case by 8a, passes through the stripping plate 2, the sheet 3 and the plate 1, and a release position shown in solid lines, in which the needles 8 are completely exposed at least of the plate 1 and the sheet 3, and preferentially The backing plate 2.
  • the reciprocating mechanism is not described in more detail here.
  • the stripping plate 2 is fixed on two upper lateral uprights 15a and 15b of the needling frame while the needling plate 1 is fixed on two lower side uprights 15c and 15d. Means (not visible in Figure 1) are provided to allow the disassembly and easy reassembly of these plates 1 and 2.
  • a blowing ramp 16 is disposed above the stripping plate 2 so as to laterally drive the fibers which in operation are driven upwards out of the stripping plate by the movement in va-and - needles.
  • a second blowing ramp 17 is provided below the needling plate 1 for laterally displacing the fibers that are driven by the needles under the needling plate 1.
  • the ramps 16 and 17 each consist of a hollow tube attached here respectively to the lateral upright of the upper frame 15a and lower 15c of the frame of the needling machine, and so as to extend longitudinally opposite the needle edge 10 of the board 7 to the passage thereof, perpendicular to the direction of transport of the web 3.
  • the ramps 16 and 17 are arranged on the same side 15a of the machine corresponding to the outlet of the sheet 3.
  • the tubes are provided with small diameter blow holes, arranged in line opposite the needle edge 10, and so that the jets of air projected by these orifices are substantially horizontal, perpendicular to the edge of the needles 10 (shown diagrammatically by the arrows F) and as close as possible flush with the outer faces of the plates 1 and 2.
  • Conventional means and known per se are used to fix the blowing ramps 16 and 17.
  • the interior of each ramp is placed in communication, preferably by the two ends of the ramp, with a source of air under pressure, for example by means of a system of pipes fixed to the frame of the needling machine and connected to a cylinder pressurized air.
  • the pressure of the bottle is preferably chosen high, typically 9 bar, to obtain, given the different pressure losses, air jets capable of effectively chasing the fibers outside the plates.
  • Adjustment valves possibly automated, are also provided between the cylinder and the ramps to adjust the characteristics of the air jets expelled by the blowing outlets of the ramps. Means are also provided for then automatically controlling the closing and opening of the valves to create blowing periods and stopping periods during operation of the needling machine.
  • openings 18 are formed in the lateral frame upright 15b located opposite the machine.
  • the openings 18 are formed at the base of the lateral upright opposite the direction of blowing. They are distributed over the length of the machine, at least over the length opposite the blowing ramp located on the lateral upright opposite frame.
  • blow ramps can be arranged parallel to the direction of movement of the web, on the front or rear of the machine.
  • the needling machine represented in FIG. 2 is a single-needle needling machine comprising, in a conventional manner, two needle boards 20 and 21 arranged side by side along the path of the sheet 3 to needling and making it possible therefore to perform a double needling of the sheet 3. It conventionally comprises for the two planks a single stripping plate 22 and a single needling plate 23. These various component parts have the same characteristics as in the needling machine of FIG. 1 and the boards 20 and 21 are similarly actuated by come and go.
  • the blowing on the outer face of the stripping plate 22 is preferably carried out, as can be seen in FIG. 2, by means of two blow ramps 24, 25, similar to those of FIG. 1, but installed on the central upright 26 of the frame of the machine and so advantageously to direct each air flow to the outside of the machine in opposite directions (F1, F2) to each other .
  • openings 18 are formed in the external lateral frame uprights adapted to the evacuation outside the machine of the fibers blown by the ramps 24 and 25.
  • FIG. 2 also illustrates the fact that, according to the invention, it is possible to use, beneath the needling plate 23, two blowing ramps facing each other, such as 28, 29 on the side of the board 20, replacing a single ramp 17 as in Figure 1.
  • This allows to use less pressure by only reaching half the distance between the two ramps.
  • it will advantageously alternate the blowing by one and the other of the ramps 28, 29 to not upset the flow.
  • it will be understood that in the interests of simplifying the system of pressurized air ducts, it is also possible, in the case of a simple two-ply striking machine, to prefer that the entire blowing be carried out from the central uprights of the duct. frame.
  • FIG. 3 illustrates another type of needling, called double-striker, to which the invention can be applied.
  • the needling machine distinguished by two needle boards moved back and forth symmetrically: a board 45 located above a stripping plate 46, as in the machines of Figures 1 and 3, and a board 47 located symmetrically below the second plate 48 in this case also constituting a cleaning plate.
  • the web 3 is thus needled according to its two faces (with an alternating movement of the boards).
  • a single ramp 51 is preferably provided for blowing on the outer face of the machine.
  • Venting openings 18 in the side frame uprights also allow to evacuate out of the machine air charged with blown fibers by the ramps 50 and 51.
  • the ramps 50 and 51 on the input side of the web 3 in the needling machine. This may be advantageous for some types of volatile fibers.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Laminated Bodies (AREA)
  • Preliminary Treatment Of Fibers (AREA)

Abstract

The needling machine, for needle bonding a nonwoven, has a needle board (7) with an array of parallel needles, moved up and down by a drive. The needles are aligned with openings in an upper plate (2), to pass through the plate and the layer of fibers (3) to be bonded and through a lower plate (1). Compressed air is blown through jets (16,17) as a stream (F) which is passed laterally over the surface of at least one of the plates, while not in contact with the fiber material, during at least part of the time while the needles are bonding the fibers.

Description

La présente invention concerne un procédé pour limiter l'encrassement d'une aiguilleteuse par les fibres volantes composant la nappe à aiguilleter, plus particulièrement pour limiter l'encrassement des plaques de débourrage et d'aiguilletage, et par extension des planches à aiguilles.The present invention relates to a method for limiting the fouling of a needling machine by the flying fibers constituting the needling sheet, more particularly to limit the fouling of the needling and needling plates, and by extension of the needle boards.

La présente invention propose également une aiguilleteuse mettant en oeuvre ce procédé.The present invention also proposes a needling machine implementing this method.

Une aiguilleteuse comprend classiquement au moins une planche, munie d'un jeu d'aiguilles parallèles, actionnée en va et vient suivant la direction longitudinale des aiguilles pour pénétrer de manière répétée à travers une nappe de fibres de façon à consolider la nappe en entrelaçant les fibres qui la composent. Le trajet des fibres dans la zone de travail des aiguilles est classiquement défini entre deux plaques munies de perforations pour le passage des aiguilles. La plaque située du côté où se trouvent les aiguilles lorsqu'elles sont en position de retrait est appelée "plaque de débourrage". Elle sert à empêcher la nappe de fibres d'être entraînée par les aiguilles dans leur mouvement de retour vers la position de retrait. L'autre plaque, servant à empêcher la nappe de fibres d'être poussée par les pointes des aiguilles, est appelée "plaque d'aiguilletage". En cours de fonctionnement, des fibres peuvent être plus ou moins entraînées par les aiguilles en dehors des deux plaques. Ces fibres tendent à boucher les orifices de passage des aiguilles dans les plaques et également à s'accumuler avec le temps à la base des aiguilles formant un matelas très dur capable de déformer la plaque de débourrage au moment de la frappe des aiguilles. Les deux plaques, de débourrage et d'aiguilletage, ainsi que la ou les planches à aiguilles nécessitent donc d'être périodiquement démontées pour être nettoyées. Ces opérations de démontage et de remontage nécessitent l'arrêt de la machine et présentent un coût non négligeable de main d'oeuvre. Il importe donc tout particulièrement d'en réduire la fréquence.A needling machine conventionally comprises at least one board, provided with a set of parallel needles, actuated back and forth in the longitudinal direction of the needles to repeatedly penetrate through a sheet of fibers so as to consolidate the sheet by interlacing the fibers that compose it. The path of the fibers in the working zone of the needles is conventionally defined between two plates provided with perforations for the passage of the needles. The plate on the side where the needles are when in the retracted position is referred to as the "stripping plate". It serves to prevent the fiber web from being driven by the needles back into the retracted position. The other plate, used to prevent the web of fibers from being pushed by the tips of the needles, is called "needling plate". During operation, fibers may be more or less driven by the needles outside the two plates. These fibers tend to clog the needle passage holes in the plates and also to accumulate with time at the base of the needles forming a very hard mattress capable of deforming the stripping plate at the time of striking the needles. The two plates, debourrage and needling, and the needle board or need to be periodically removed for cleaning. These disassembly and reassembly operations require the stopping of the machine and have a significant cost of labor. It is therefore particularly important to reduce the frequency.

La présente invention propose une solution pour atteindre cet objectif.The present invention proposes a solution to achieve this objective.

Le document FR 2 541 324 décrit des moyens de nettoyage d'aiguilleteuse pouvant être mis en oeuvre en continu avec la marche de la machine. Ces moyens comprennent un caisson ménagé sous la table d'aiguilletage dans le sens longitudinal de la machine. Dans le caisson est placé un moyen de type vis sans fin capable d'évacuer mécaniquement les fibres volantes jusqu'à une extrémité de sortie du caisson. A ces moyens peuvent être associés des moyens pneumatiques réalisant un soufflage à un orifice d'entrée à une extrémité du caisson et une aspiration par un conduit de sortie à l'autre extrémité du caisson.The document FR 2 541 324 describes needling cleaning means that can be implemented continuously with the machine running. These means comprise a box formed under the needling table in the longitudinal direction of the machine. In the box is placed worm-type means capable of mechanically evacuating the flying fibers to an outlet end of the box. To these means may be associated pneumatic means blowing an inlet port at one end of the box and a suction through an outlet conduit at the other end of the box.

Le document US 5,148,584 décrit une planche à aiguilles et un débourreur associé permettant de réduire le marquage de la nappe dû à l'aiguilletage pas à pas. La planche comporte des zones dans lesquelles les aiguilles sont resserrées au maximum par groupes de rangées. Le débourreur associé comporte des lumières pour le passage de groupes entiers d'aiguilles à la place de trous d'aiguilles individuels. Des zones transversales (par rapport au déplacement de la nappe) sont prévues entre les lumières pour assurer la tenue mécanique du débourreur. Dans ces zones transversales peuvent être ménagés des conduites de soufflage et/ou d'aspiration.The document US 5,148,584 discloses a needle board and an associated stripper to reduce the marking of the sheet due to needling step by step. The board has areas in which the needles are tightened as much as possible in groups of rows. The associated stripper has lights for the passage of entire sets of needles instead of individual needle holes. Transverse zones (relative to the movement of the sheet) are provided between the lights to ensure the mechanical strength of the stripper. In these transverse zones may be provided blow and / or suction lines.

L'invention propose un procédé selon la revendication 1, qui se distingue des documents FR 2 541 324 et US 5 148 584 notamment en ce qu'il permet au soufflage d'être effectué de manière discontinue pour alterner des périodes de soufflage avec des périodes d'arrêt.The invention proposes a method according to claim 1, which differs from the documents FR 2 541 324 and US 5,148,584 in particular that it allows the blowing to be performed discontinuously to alternate blowing periods with periods of stopping.

Le procédé selon l'invention permet de fonctionner par à-coups pour décrocher des fibres, et peut comprendre en outre une reconstitution à l'aide d'un surpresseur, pendant des périodes d'arrêt, d'une réserve d'air sous pression élevée à partir d'un réseau existant d'air comprimé.The method according to the invention makes it possible to operate in jerks to unhook fibers, and may furthermore comprise a reconstitution with the aid of a booster, during periods of stopping, of a reserve of air under pressure. raised from an existing compressed air network.

De l'air sous pression est ainsi projeté au dessus et/ou en dessous des plaques, ainsi qu'entre les aiguilles au passage de celles-ci. De cette manière, les fibres de la nappe pouvant être entraînées ou poussées par les aiguilles en dehors des plaques sont chassées latéralement avant qu'elles ne s'accumulent et forment un matelas près de la planche à la base des aiguilles. Les fibres chassées par le soufflage latéral tombent ensuite par gravité à côté des plaques et en dehors de la machine par les ouvertures classiquement présentes dans ce type de machine. Les fibres chassées peuvent aussi être aspirées par les moyens d'aspiration également classiquement présents dans ce type de machine notamment sous la plaque d'aiguilletage. Grâce à l'invention, la fréquence de nettoyage est fortement réduite, voire supprimée.Pressurized air is thus projected above and / or below the plates, as well as between the needles as they pass. In this way, the fibers of the web that can be driven or pushed by the needles out of the plates are driven laterally before they accumulate and form a mattress near the board at the base of the needles. The fibers driven by the lateral blowing then fall by gravity next to the plates and outside the machine through the openings classically present in this type of machine. The removed fibers can also be sucked by the suction means also conventionally present in this type of machine in particular under the needling plate. Thanks to the invention, the cleaning frequency is greatly reduced or even eliminated.

Des jets d'air à grande vitesse peuvent être typiquement obtenus en guidant de l'air sous pression à travers des orifices de petites dimensions, pratiqués par exemple dans une rampe de soufflage alimentée par une source d'air sous pression.High velocity air jets can typically be obtained by guiding air under pressure through orifices of small dimensions, for example in a discharge ramp supplied by a source of pressurized air.

Le soufflage peut être réalisé de différentes manières en fonction de la plaque concernée et également en fonction du type de machine (simple ou double frappe et double aiguilletage en vis-à-vis).The blowing can be carried out in different ways depending on the plate concerned and also depending on the type of machine (single or double strike and double needling vis-à-vis).

Ainsi notamment :

  • d'une manière générale, pour une plaque située au dessus de la nappe, le soufflage est de préférence réalisé latéralement selon une seule direction et de manière à chasser les fibres latéralement à l'extérieur de la plaque ; s'il s'agit d'une aiguilleteuse à double frappe, dans laquelle deux planches à aiguilles sont placées côte à côte selon le trajet de la nappe, le soufflage est de préférence réalisé depuis une partie centrale de bâti entre les deux planches à aiguilles et selon deux sens opposés vers les montants latéraux extérieurs de bâti.
  • pour une plaque située en dessous de la nappe, le soufflage peut être réalisé indifféremment selon un seul sens ou deux sens opposés, les fibres tombant par gravité automatiquement en dessous des plaques ou étant aspirées ; la puissance de soufflage est par ailleurs adaptée pour que les jets d'air atteignent le milieu de la section de passage des aiguilles et le soufflage est réalisé de préférence alternativement d'un côté puis de l'autre pour éviter que les flux d'air se contrarient ; s'il s'agit d'une aiguilleteuse à double frappe, c'est-à-dire comportant deux planches à aiguilles en vis à vis, une planche en dessus et une planche en dessous de la nappe, le soufflage en dessous de la nappe est de préférence réalisé latéralement selon un seul sens et de manière à chasser les fibres vers l'extérieur de la plaque et éviter qu'elles ne retombent sur la planche à aiguilles du dessous.
In particular:
  • generally, for a plate located above the sheet, the blowing is preferably carried out laterally in one direction and so as to drive the fibers laterally outside the plate; if it is a double-sided needling machine, in which two needle boards are placed side by side according to the path of the sheet, the blowing is preferably carried out from a central portion of the frame between the two needle boards and in two opposite directions to the outer side mount pillars.
  • for a plate located below the sheet, the blowing can be carried out indifferently in one direction or two opposite directions, the fibers falling by gravity automatically below the plates or being sucked up; the blowing power is also adapted so that the air jets reach the middle of the passage section of the needles and the blowing is preferably performed alternately on one side and then on the other to prevent the air flow contradict each other; if it is a double-pointed needling machine, that is to say having two needle boards facing each other, a board above and a board below the sheet, the blowing below the web is preferably made laterally in one direction and so as to drive the fibers out of the plate and prevent them from falling on the needle board below.

Des moyens de gestion des caractéristiques des flux d'air à produire et le cas échéant des périodes de soufflage peuvent être prévus.Means for managing the characteristics of the air flows to be produced and, where appropriate, the blowing periods may be provided.

Selon d'autres caractéristiques encore, le soufflage est réalisé de préférence au plus près au ras des plaques et horizontalement.According to other characteristics, the blowing is preferably carried out as close to the flush of the plates and horizontally.

La présente invention sera mieux comprise et d'autres avantages apparaîtront à la lumière de la description qui va suivre d'exemples de réalisation, description faite en référence aux dessins sur lesquels :

  • la figure 1 est une vue schématique en élévation en coupe partielle d'une aiguilleteuse selon l'invention à simple frappe avec une planche;
  • la figure 2 est une vue similaire à la figure 1 montrant une aiguilleteuse selon l'invention à simple frappe avec deux planches ; et
  • la figure 3 est une vue similaire aux figures 1 et 2 montrant une aiguilleteuse à double frappe selon l'invention.
The present invention will be better understood and other advantages will become apparent in the light of the following description of embodiments, description made with reference to the drawings in which:
  • Figure 1 is a schematic elevational view in partial section of a needling machine according to the invention single-strike with a board;
  • Figure 2 is a view similar to Figure 1 showing a needling according to the invention single-strike with two boards; and
  • FIG. 3 is a view similar to FIGS. 1 and 2 showing a double-strangling needling machine according to the invention.

L'aiguilleteuse représentée à la figure 1 comprend une plaque d'aiguilletage perforée 1 généralement horizontale et une plaque de retenue 2, encore appelée "plaque de débourrage", placée à peu près parallèlement à une certaine distance au-dessus de la plaque 1. La plaque de débourrage 2 et la plaque d'aiguilletage 1 définissent entre elles un trajet dans un plan sensiblement horizontal pour une nappe de fibres 3. La plaque de débourrage 2 comprend des perforations alignées avec celles de la plaque 1. A l'entrée du trajet sont placés des moyens introducteurs 4 schématisés sous la forme d'une paire de rouleaux moteurs entre lesquels passe la nappe 3. A la sortie du trajet, la nappe 3 consolidée et compactée par aiguilletage est entraînée par des moyens extracteurs 6 également schématisés par deux rouleaux moteurs entre lesquels passe la nappe 3.The needling machine shown in FIG. 1 comprises a generally horizontal perforated needling plate 1 and a retaining plate 2, also called a "cleaning plate", placed approximately parallel to a certain distance above the plate 1. The stripping plate 2 and the needling plate 1 define between them a path in a substantially horizontal plane for a ply of fibers 3. The stripping plate 2 comprises perforations aligned with those of the plate 1. At the entrance of the path are placed means of introduction 4 schematically in the form of a pair of drive rollers between which passes the web 3. At the exit of the path, the ply 3 consolidated and compacted by needling is driven by extractor means 6 also schematized by two motor rollers between which the web passes 3.

La plaque de débourrage 2 est placée entre le trajet de la nappe 3 et une planche à aiguilles 7. La planche 7 porte du côté de la plaque de débourrage 2 un grand nombre d'aiguilles 8 orientées perpendiculairement au plan du trajet de la nappe 3, avec leur pointe dirigée vers la nappe 3. Chaque aiguille est positionnée en face d'une perforation de la plaque de débourrage 2 et d'une perforation correspondante de la plaque d'aiguilletage 1. Du côté opposé aux aiguilles 8, la planche à aiguilles 7 est fixée à une poutre support 9 elle-même fixée à l'extrémité d'au moins une tige 11 montée coulissante selon un axe 12, parallèle aux aiguilles 8 et perpendiculaire au plan du trajet de la nappe 3. S'il est prévu plusieurs tiges 11, celles-ci sont par exemple alignées les unes derrières les autres lorsqu'elles sont vues de la manière représentée à la figure 1. L'équipage mobile constitué de la ou des tiges coulissantes 11, de la poutre support 9 et de la planche 7 est animé en service d'un mouvement alternatif de va et vient selon la direction 12 entre une position 7a dans laquelle l'extrémité des aiguilles, désignée dans ce cas par 8a, traverse la plaque de débourrage 2, la nappe 3 et la plaque 1, et une position de dégagement représentée en traits pleins, dans laquelle les aiguilles 8 sont totalement dégagées au moins de la plaque 1 et de la nappe 3, et préférentiellement de la plaque de débourrage 2. Le mécanisme d'actionnement en va et vient n'est pas décrit plus en détails ici.The stripping plate 2 is placed between the path of the sheet 3 and a needle board 7. The board 7 bears on the side of the stripping plate 2 a large number of needles 8 oriented perpendicularly to the plane of the path of the sheet 3 , with their point directed towards the sheet 3. Each needle is positioned in front of a perforation of the cleaning plate 2 and a corresponding perforation of the plate 1. On the opposite side to the needles 8, the needle board 7 is attached to a support beam 9 itself fixed to the end of at least one rod 11 slidably mounted along an axis 12, parallel to the needles 8 and perpendicular to the plane of the path of the web 3. If there are several rods 11, they are for example aligned one behind the other when viewed in the manner shown in Figure 1. The moving equipment consisting of the sliding rod or rods 11, the support beam 9 and the board 7 is driven in service reciprocating back and forth in the direction 12 between a position 7a in which the end of the needles, designated in this case by 8a, passes through the stripping plate 2, the sheet 3 and the plate 1, and a release position shown in solid lines, in which the needles 8 are completely exposed at least of the plate 1 and the sheet 3, and preferentially The backing plate 2. The reciprocating mechanism is not described in more detail here.

La plaque de débourrage 2 est fixée sur deux montants latéraux supérieurs 15a et 15b de bâti de l'aiguilleteuse tandis que la plaque d'aiguilletage 1 est fixée sur deux montant latéraux inférieurs 15c et 15d. Des moyens (non visibles sur la figure 1) sont prévus pour permettre le démontage et le remontage facile de ces plaques 1 et 2.The stripping plate 2 is fixed on two upper lateral uprights 15a and 15b of the needling frame while the needling plate 1 is fixed on two lower side uprights 15c and 15d. Means (not visible in Figure 1) are provided to allow the disassembly and easy reassembly of these plates 1 and 2.

Pour réaliser l'invention, une rampe de soufflage 16 est disposée au dessus de la plaque de débourrage 2 de manière à chasser latéralement les fibres qui en fonctionnement sont entraînées vers le haut en dehors de la plaque de débourrage par le mouvement en va-et-vient des aiguilles. De même, une seconde rampe de soufflage 17 est prévue en dessous de la plaque d'aiguilletage 1 pour déplacer latéralement les fibres qui sont entraînées par les aiguilles sous la plaque d'aiguilletage 1. Les rampes 16 et 17 sont constituées chacune d'un tube creux fixé ici respectivement sur le montant latéral du bâti supérieur 15a et inférieur 15c du bâti de l'aiguilleteuse, et de manière à s'étendre longitudinalement en regard du bord d'aiguilles 10 de la planche 7 au passage de celle-ci, perpendiculairement à la direction de transport de la nappe 3. Dans cet exemple, les rampes 16 et 17 sont disposées du même côté 15a de la machine correspondant à la sortie de la nappe 3. Les tubes sont munis d'orifices de soufflage de petit diamètre, disposés en ligne en regard du bord d'aiguilles 10, et de sorte que les jets d'air projetés par ces orifices soient sensiblement horizontaux, perpendiculaires au bord d'aiguilles 10 (schématisé par les flèches F) et le plus près possible au ras des faces extérieures des plaques 1 et 2. Des moyens classiques et connus en soi sont utilisés pour fixer les rampes de soufflage 16 et 17 . L'intérieur de chaque rampe est mis en communication, de préférence par les deux extrémités de la rampe, avec une source d'air sous pression, par exemple grâce à un système de canalisations fixées au bâti de l'aiguilleteuse et reliées à une bonbonne d'air sous pression. La pression de la bonbonne est de préférence choisie élevée, typiquement de 9 bars, permettant d'obtenir, compte tenu des différentes pertes de charge, des jets d'air capables de chasser efficacement les fibres en dehors des plaques. Des vannes de réglage, éventuellement automatisées, sont également prévues entre la bonbonne et les rampes pour régler les caractéristiques des jets d'air expulsés par les orifices de soufflage des rampes. Des moyens sont également prévus pour commander ensuite automatiquement la fermeture et l'ouverture des vannes pour créer des périodes de soufflage et des périodes d'arrêt pendant le fonctionnement de l'aiguilleteuse. Pour l'évacuation de l'air chargé de fibres produit au dessus de la plaque de débourrage 2 par la rampe 16, des ouvertures 18 sont ménagées dans le montant latéral de bâti 15b se trouvant à l'opposé de la machine. Les ouvertures 18 sont ménagées à la base du montant latéral en regard de la direction de soufflage. Elles sont réparties sur la longueur de la machine, au moins sur la longueur en vis à vis de la rampe de soufflage se trouvant sur le montant latéral de bâti opposé.To achieve the invention, a blowing ramp 16 is disposed above the stripping plate 2 so as to laterally drive the fibers which in operation are driven upwards out of the stripping plate by the movement in va-and - needles. Similarly, a second blowing ramp 17 is provided below the needling plate 1 for laterally displacing the fibers that are driven by the needles under the needling plate 1. The ramps 16 and 17 each consist of a hollow tube attached here respectively to the lateral upright of the upper frame 15a and lower 15c of the frame of the needling machine, and so as to extend longitudinally opposite the needle edge 10 of the board 7 to the passage thereof, perpendicular to the direction of transport of the web 3. In this for example, the ramps 16 and 17 are arranged on the same side 15a of the machine corresponding to the outlet of the sheet 3. The tubes are provided with small diameter blow holes, arranged in line opposite the needle edge 10, and so that the jets of air projected by these orifices are substantially horizontal, perpendicular to the edge of the needles 10 (shown diagrammatically by the arrows F) and as close as possible flush with the outer faces of the plates 1 and 2. Conventional means and known per se are used to fix the blowing ramps 16 and 17. The interior of each ramp is placed in communication, preferably by the two ends of the ramp, with a source of air under pressure, for example by means of a system of pipes fixed to the frame of the needling machine and connected to a cylinder pressurized air. The pressure of the bottle is preferably chosen high, typically 9 bar, to obtain, given the different pressure losses, air jets capable of effectively chasing the fibers outside the plates. Adjustment valves, possibly automated, are also provided between the cylinder and the ramps to adjust the characteristics of the air jets expelled by the blowing outlets of the ramps. Means are also provided for then automatically controlling the closing and opening of the valves to create blowing periods and stopping periods during operation of the needling machine. For the evacuation of the fiber-laden air produced above the stripping plate 2 by the ramp 16, openings 18 are formed in the lateral frame upright 15b located opposite the machine. The openings 18 are formed at the base of the lateral upright opposite the direction of blowing. They are distributed over the length of the machine, at least over the length opposite the blowing ramp located on the lateral upright opposite frame.

Il va de soi que des variantes de réalisation sont possibles, notamment, les rampes de soufflage peuvent être disposées parallèlement au sens de déplacement de la nappe, sur l'avant ou l'arrière de la machine.It goes without saying that alternative embodiments are possible, in particular, the blow ramps can be arranged parallel to the direction of movement of the web, on the front or rear of the machine.

L'aiguilleteuse représentée à la figure 2 est une aiguilleteuse simple frappe comprenant classiquement deux planches à aiguilles 20 et 21 disposées côte à côte sur le trajet de la nappe 3 à aiguilleter et permettant de pratiquer par conséquent un double aiguilletage de la nappe 3. Elle comprend classiquement pour les deux planches une seule plaque de débourrage 22 et une seule plaque d'aiguilletage 23. Ces différents pièces constitutives présentent les mêmes caractéristiques que dans l'aiguilleteuse de la figure 1 et les planches 20 et 21 sont de manière similaires actionnées en va et vient.The needling machine represented in FIG. 2 is a single-needle needling machine comprising, in a conventional manner, two needle boards 20 and 21 arranged side by side along the path of the sheet 3 to needling and making it possible therefore to perform a double needling of the sheet 3. It conventionally comprises for the two planks a single stripping plate 22 and a single needling plate 23. These various component parts have the same characteristics as in the needling machine of FIG. 1 and the boards 20 and 21 are similarly actuated by come and go.

Dans ce type de machine, le soufflage sur la face extérieure de la plaque de débourrage 22 est réalisé de préférence, comme on le voit sur la figure 2, à l'aide de deux rampes de soufflage 24, 25, similaires à celles de la figure 1, mais installées sur le montant central 26 du bâti de la machine et de manière à diriger avantageusement chacune le flux d'air vers l'extérieur de la machine dans des sens opposés (F1, F2) l'un à l'autre. De la même manière que dans l'aiguilleteuse de la figure 1, des ouvertures 18 sont ménagées dans les montants latéraux extérieurs de bâti adaptées à l'évacuation à l'extérieur de la machine des fibres soufflées par les rampes 24 et 25.In this type of machine, the blowing on the outer face of the stripping plate 22 is preferably carried out, as can be seen in FIG. 2, by means of two blow ramps 24, 25, similar to those of FIG. 1, but installed on the central upright 26 of the frame of the machine and so advantageously to direct each air flow to the outside of the machine in opposite directions (F1, F2) to each other . In the same manner as in the needling machine of FIG. 1, openings 18 are formed in the external lateral frame uprights adapted to the evacuation outside the machine of the fibers blown by the ramps 24 and 25.

La figure 2 illustre également le fait que, selon l'invention, on peut utiliser sous la plaque d'aiguilletage 23 deux rampes de soufflage en vis à vis, telles que 28, 29 du côté de la planche 20, en remplacement d'une unique rampe 17 comme à la figure 1. Cela permet d'utiliser moins de pression en ne visant à atteindre que la moitié de la distance entre les deux rampes. Dans cette configuration, on alternera avantageusement le soufflage par l'une et l'autre des rampes 28, 29 pour ne pas contrarier les flux. Toutefois, on comprendra que dans le soucis de simplifier le système de canalisations d'air sous pression, on peut aussi dans le cas d'une machine simple frappe à deux planches, préférer que l'ensemble du soufflage soit effectué depuis les montants centraux de bâti.FIG. 2 also illustrates the fact that, according to the invention, it is possible to use, beneath the needling plate 23, two blowing ramps facing each other, such as 28, 29 on the side of the board 20, replacing a single ramp 17 as in Figure 1. This allows to use less pressure by only reaching half the distance between the two ramps. In this configuration, it will advantageously alternate the blowing by one and the other of the ramps 28, 29 to not upset the flow. However, it will be understood that in the interests of simplifying the system of pressurized air ducts, it is also possible, in the case of a simple two-ply striking machine, to prefer that the entire blowing be carried out from the central uprights of the duct. frame.

La figure 3 illustre un autre type d'aiguilleteuse, dite à double frappe, à laquelle on peut appliquer l'invention. L'aiguilleteuse se distingue par deux planches à aiguilles déplacées en va et vient symétriquement : une planche 45 située au dessus d'une plaque de débourrage 46, comme dans les machines des figures 1 et 3, et une planche 47 située symétriquement en dessous de la seconde plaque 48, constituant dans ce cas également une plaque de débourrage. Dans ce type de machine, la nappe 3 est ainsi aiguilletée selon ses deux faces (avec un mouvement alterné des planches). Comme à la figure 1, il est prévu de préférence une seule rampe de soufflage 50 sur la face extérieure de la plaque de débourrage 46. Similairement, dans cette machine, il est prévu de préférence une seule rampe 51 pour souffler sur la face extérieure de la plaque de débourrage 48 afin bien entendu que les fibres ne retombent pas sur la planche à aiguilles 47. Des ouvertures d'évacuation 18 dans les montants latéraux de bâti permettent ici aussi d'évacuer hors de la machine l'air chargé de fibres soufflées par les rampes 50 et 51. Sur cette figure 3, on a également représenté les rampes 50 et 51 du côté de l'entrée de la nappe 3 dans l'aiguilleteuse. Cela peut être avantageux pour certains types de fibres volatiles.FIG. 3 illustrates another type of needling, called double-striker, to which the invention can be applied. The needling machine distinguished by two needle boards moved back and forth symmetrically: a board 45 located above a stripping plate 46, as in the machines of Figures 1 and 3, and a board 47 located symmetrically below the second plate 48 in this case also constituting a cleaning plate. In this type of machine, the web 3 is thus needled according to its two faces (with an alternating movement of the boards). As in FIG. 1, it is preferable to provide a single blowing ramp 50 on the outside face of the cleaning plate 46. Similarly, in this machine, a single ramp 51 is preferably provided for blowing on the outer face of the machine. the cleaning plate 48 to ensure that the fibers do not fall on the needle board 47. Venting openings 18 in the side frame uprights also allow to evacuate out of the machine air charged with blown fibers by the ramps 50 and 51. In this Figure 3, there is also shown the ramps 50 and 51 on the input side of the web 3 in the needling machine. This may be advantageous for some types of volatile fibers.

Claims (20)

  1. A method for limiting fooling of a needling machine by flying fibres composing a fleece (3) to be needle-punched, the needling machine including at least one needle board (7, 20, 21, 45, 47) supporting a set of parallel needles (8), said needle board being reciprocated between a withdrawal position of the needles and a maximum penetration position of the needles through a first plate (2, 22, 46, 48), the fleece to be needled-punched (3) and a second plate (1, 23, 46, 48), wherein air is projected under pressure laterally onto the exterior face, which is not in contact with the fleece, of at least one of said plates (1, 2, 22, 23, 46, 48), during at least part of the time of operation of the needling machine, characterized in that the air is projected intermittently.
  2. A method according to claim 1, characterized in that the air is projected in the form of jets (F) provided by pressurized air projected through orifices.
  3. A method according to claim 1 or 2, characterized by comprising the step of restoring an air reserve under high pressure during rest periods by means of a pressure booster from an existing pressurized air network.
  4. A method according to one of claims 1 - 3, characterized in that the air is projected laterally in a direction and in such a way that the fibres are laterally expelled from the machine.
  5. A method according to one of claims 1 - 3, characterized in that the air is projected laterally along two opposed directions alternately and thereby to cover at least half of the needles passage section.
  6. A method according to one of the foregoing claims, characterized in that the blowing direction is horizontal.
  7. A method according to one of the foregoing claims, characterized in that the blowing is performed flush with the plate (1, 2, 22, 23, 46, 48).
  8. A method according to one of the foregoing claims, characterized in that the blowing is performed on the exterior face of the plate (2, 22, 46, 48) located on the side of the withdrawal position of the needles and along a single lateral direction of blowing.
  9. A method according to claim 8, characterized in that the blowing is moreover performed on the exterior face of the plate (1, 23) located on the side of the penetration position of the needles and along two opposed lateral directions of blowing.
  10. A method according to one of the foregoing claims, characterized in that the air, when projected in a single direction, is projected from the inlet of the fleece to be needled, along the fleece-forwarding direction.
  11. A needling machine for performing the method according to one of the foregoing claims, comprising :
    - a frame (15a, 15b ; 26) ;
    - the first plate (2, 22, 46,48) ;
    - the second plate (1, 23, 46,48) ; and
    - at least one board (7 ; 20, 21, 45,47) on which the needles (8) are in a projecting arrangement, said board connected to an actuation mechanism for producing the reciprocal displacement ;
    - blowing means (16, 17 ; 24, 25, 28, 29, 50, 51) adapted to project pressurized air laterally on the exterior face, not being in contact with the fleece, of at least one of said plates (1, 2, 22, 23, 46,48) ;
    characterized in that the blowing means comprise means for controlling the blowing with blowing periods alternating with rest periods.
  12. A needling machine according to claim 11, characterized in that the blowing means comprise :
    - at least one lateral blowing rail (16, 17 ; 24, 25, 28, 29, 50, 51) mounted onto said frame (15a, 15b, 15c, 15d, 26) and comprising blowing orifices adapted to project air jets onto said plate exterior face ; and
    - pressurized air production means intended to be intercommunicated with the inside of said rail.
  13. A needling machine according to claim 12, characterized by a rail (16, 24, 25, 50, 51) located on said frame thereby to project air jets onto the exterior face of the plate at least on the needle passage section.
  14. A needling machine according to claim 12 or 13, characterized by a second lateral blowing rail (17, 28, 29) located on said frame thereby to project air jets onto the exterior face of the second plate (1, 23, 48) at least on the needle passage section.
  15. A needling machine according to claim 12 or 13, characterized by two lateral blowing rails (28, 29) located on said frame thereby to project air jets onto the exterior face of the second plate (23) along two opposed directions on at least half of the needle passage section.
  16. A needling machine according to one of claims 11 - 15, characterized in that each rail (16, 24, 25, 50, 51) is located as close as possible flush with the corresponding plate and thereby to project air jets along a horizontal direction.
  17. A needling machine according to one of claims 11 - 16, characterized in that the frame is provided with openings (18) in the exterior side posts thereof, allowing fibre-loaded air to be expelled outside the needling machine.
  18. A needling machine according to one of claims 11 - 17, characterized in that the blowing rail(s) is(are) provided on the frame of the needling machine on the fleece inlet side and adapted to blow in the fleece-forwarding direction.
  19. A needling machine according to one of claims 11 - 18, characterized by being a dual strike machine, comprising two needle boards (45, 47) arranged in a mutual facing relationship above and below the fleece to be needled, le.
  20. A needling machine according to one of claims 11 - 19, characterized by being a single strike machine, comprising two needle boards (20, 21) arranged side by side along the path for the fleece to be needled (3) and a central frame part (26) between the two boards (20, 21), wherein the blowing means (24, 25) are adapted to project pressurized air laterally along two opposed directions from the central frame part (26) and thereby on either side to expel the fibres outside the machine.
EP03291659A 2002-07-26 2003-07-04 Process for limiting the fooling of a needling machine from flying fibers and a needle machine therefore Expired - Lifetime EP1384804B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0209578A FR2842835B1 (en) 2002-07-26 2002-07-26 METHOD FOR LIMITING THE ENCRASSMENT OF A NEEDLEFILLER BY FLYING FIBERS AND A NEEDLEFOLDER USING SAID METHOD
FR0209578 2002-07-26

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EP1384804A1 EP1384804A1 (en) 2004-01-28
EP1384804B1 true EP1384804B1 (en) 2007-10-24

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AT (1) ATE376599T1 (en)
DE (1) DE60317016T2 (en)
FR (1) FR2842835B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2305871A1 (en) 2009-09-30 2011-04-06 VÚTS, a.s. Method and device for reducing noise generated during operation of needling machine for production of nonwoven fabrics
EP4144904A1 (en) * 2021-09-06 2023-03-08 Andritz Asselin-Thibeau Needling machine for needling a web or a web of fibres, in particular a nonwoven
EP4361331A1 (en) * 2022-10-31 2024-05-01 Rohr, Inc. Systems and methods for spray cleaning needles for through thickness reinforcement of resin-infused fabrics

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Publication number Priority date Publication date Assignee Title
FR2880635B1 (en) * 2004-11-24 2007-04-06 Asselin Soc Par Actions Simpli NEEDLE HEADER WITH ADJUSTABLE HEAD HEIGHT
CN107059253B (en) * 2017-06-07 2022-08-26 江苏迎阳无纺机械有限公司 Needle loom peels off otter board structure of taking air current separation blade

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FR2541324B1 (en) * 1983-02-23 1985-08-16 Rhone Poulenc Fibres PROCESS AND DEVICE FOR CLEANING NEEDLE MACHINES
DE4114873A1 (en) * 1990-05-16 1991-11-21 Fehrer Ernst DEVICE FOR NEEDING A FLEECE
FR2698386B1 (en) * 1992-11-23 1995-01-06 Asselin Needling machine and needling method relating thereto.
AT402205B (en) * 1995-10-18 1997-03-25 Fehrer Textilmasch DEVICE FOR NEEDING A FLEECE
JPH09302564A (en) * 1996-05-09 1997-11-25 Okuma Mach Works Ltd Apparatus for removing fly waste in punching process in production of nonwoven fabric
IT1298629B1 (it) * 1998-03-16 2000-01-12 Federico Aspesi S R L Metodo e apparecchiatura per il trattamento di materiali tessili finiti

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2305871A1 (en) 2009-09-30 2011-04-06 VÚTS, a.s. Method and device for reducing noise generated during operation of needling machine for production of nonwoven fabrics
EP4144904A1 (en) * 2021-09-06 2023-03-08 Andritz Asselin-Thibeau Needling machine for needling a web or a web of fibres, in particular a nonwoven
EP4361331A1 (en) * 2022-10-31 2024-05-01 Rohr, Inc. Systems and methods for spray cleaning needles for through thickness reinforcement of resin-infused fabrics

Also Published As

Publication number Publication date
ATE376599T1 (en) 2007-11-15
EP1384804A1 (en) 2004-01-28
FR2842835B1 (en) 2005-01-14
FR2842835A1 (en) 2004-01-30
DE60317016T2 (en) 2008-08-14
DE60317016D1 (en) 2007-12-06

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