WO2018162624A1 - Device for transferring and/or introducing a fibre lap into a consolidation installation, in particular a needling loom - Google Patents

Device for transferring and/or introducing a fibre lap into a consolidation installation, in particular a needling loom Download PDF

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Publication number
WO2018162624A1
WO2018162624A1 PCT/EP2018/055718 EP2018055718W WO2018162624A1 WO 2018162624 A1 WO2018162624 A1 WO 2018162624A1 EP 2018055718 W EP2018055718 W EP 2018055718W WO 2018162624 A1 WO2018162624 A1 WO 2018162624A1
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WO
WIPO (PCT)
Prior art keywords
downstream end
belt
transfer
endless belt
downstream
Prior art date
Application number
PCT/EP2018/055718
Other languages
French (fr)
Inventor
Hugues Leroy
Stéphane DISPLAN
Frédéric DEMANGE
Original Assignee
Andritz Asselin-Thibeau
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Andritz Asselin-Thibeau filed Critical Andritz Asselin-Thibeau
Priority to CN201880016707.8A priority Critical patent/CN110382753B/en
Priority to EP18709012.1A priority patent/EP3592886B1/en
Publication of WO2018162624A1 publication Critical patent/WO2018162624A1/en

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G21/00—Combinations of machines, apparatus, or processes, e.g. for continuous processing
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01G—PRELIMINARY TREATMENT OF FIBRES, e.g. FOR SPINNING
    • D01G25/00—Lap-forming devices not integral with machines specified above
    • 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
    • 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
    • D04H18/04—Needling machines with water jets

Definitions

  • the present invention relates to a device for transferring and / or introducing a web of fibers, in particular a nonwoven web, into a consolidation installation, in particular a needling machine.
  • the device comprises two elements, respectively upper and lower, defining between them a gap, the thickness of which decreases in the direction of 1 needling machine and in which passes the web, each element comprising a roller, an endless belt bypassing the roll upstream and a downstream prism for forming a wedge-shaped region at the entry of the needling machine, the interstice guiding the web at the entrance to the tables of the needling machine.
  • these devices are not perfectly adapted to guide a very wide web with respect to the length of the introduction device and / or heavy and improvements are desired as regards the quality and homogeneity of the web introduced into the consolidation device and thus the consolidated sheet produced at the output, as well as the reliability over time of the transfer device, in particular concerning the service life of the endless belts or conveyor belts.
  • a device for transferring a sheet of fibers to a needling machine comprising at least one transfer element comprising at least one drive roller and at least one endless belt extending between one end upstream and downstream end, the at least one roller being arranged to drive in rotation the endless belt.
  • the endless belt circumvents a roll of large diameter which does not allow to convey the web closer to the needling table and requires the provision of additional transfer rollers between the endless belt and the needling table.
  • a device for transferring a sheet of fibers to a needling machine comprising a conveyor comprising an endless slatted belt which conveys the sheet to two wedge-shaped transfer elements arranged fixed with respect to the entrance of 1 'needling and through which pass jets of water to maintain the tablecloth, or to compress it.
  • This system is complicated, in particular because of the need to create water jets, and furthermore, given their teeth, these wedge-shaped elements can not be arranged very close to the entrance of the needling machine. .
  • the slatted conveyor is kept at a great distance from the needling machine.
  • the present invention aims at overcoming the drawbacks of the prior art by proposing a device for transferring and / or introducing a web of fibers, in particular nonwoven fibers, into a consolidation installation, particularly mechanical or hydraulic, by means of a needling machine, which makes it possible to bring the sheet to consolidate closer to the consolidation action zone, for example closer to the action zone of the needles of a needling machine, without having to perform on the web of treatments, for example stretching, which may result in a deterioration, especially in terms of homogeneity, of the introduced web, and therefore output of the consolidated web produced, or to provide a complex system.
  • a device for transferring and / or introducing a web of fibers, in particular a nonwoven web, into a consolidation plant, particularly mechanical or hydraulic, by A needling machine is as defined in claim 1, with improvements and preferred embodiments being defined in the subclaims.
  • the transfer device can be greatly simplified compared to existing devices, and for a quality at least the same, or even higher, of the consolidated web.
  • the width of a transverse band is between 6 mm and 15 mm.
  • the inner radius of curvature of the or each belt at its downstream end is for example 3.5 mm and may be in particular between 2 and 5 mm.
  • the outer radius of curvature of the or each carpet at its downstream end is in particular between 6 and 12 mm.
  • the device comprises two transfer elements, respectively upper and lower, defining between them a gap through which the web passes during its transfer, preferably by defining between them a gap whose thickness decreases from 1 upstream to 1 downstream.
  • downstream end of one of the elements is recessed, that is to say, further upstream, with respect to the downstream end of the other element.
  • the present invention also relates to an assembly comprising a consolidation device, particularly mechanical and / or hydraulic, for example a needling machine and a device according to the invention, and to an installation comprising a crosslapper and a set following the 'invention.
  • FIG. 1 represents an assembly according to an embodiment of the invention comprising a transfer device and / or introduction according to one embodiment of the invention and a needling machine
  • FIG. 2 is a longitudinal sectional view of the interface between the end of the lower and upper transfer elements and the table and stripper sheets of a needling machine, in particular having the position of the first needle relative to the transfer device of Figure 1
  • Figure 3 is a longitudinal sectional view of the lower transfer member of the transfer device of Figure 1
  • Figure 4 is a longitudinal sectional view of a portion of the endless belt of the device of Figures 1 to 3.
  • a needling comprising an upper sheet 1 called stripper and a lower plate 2 called table defining between them a substantially horizontal needling passage, in which is advanced a sheet 3, which entering the state of web formed of fibers little or not bonded together, comes out in the form of a sheet or carpet 4 needled.
  • a needle board 6 is connected to a reciprocating mechanism 7 so that the needles 8 carried by the board 6 enter the needling passage through appropriate holes in the table 1 and out of said passage. , at a fixed frequency. In a known manner, this intersects the fibers of the ply 3 and gives cohesion and mechanical strength to the ply 4 obtained at the outlet.
  • the installation comprises a device 9 for transferring and / or introducing, whose role is to transfer the nonwoven web 3 from a spreader-lapper (not shown in the figures). , with the least stretching possible, inside the needling passage.
  • the device 9 may also have a pre-compression function of the web.
  • the introduction device 9 comprises an upper transfer member 11a and a substantially identical lower transfer member 11b. Below, the lower element 11b is described. The same description applies to the upper lia element.
  • the transfer element 11b comprises a roller or a transverse shaft provided with a large number of gears distributed over the width 12 located at the upstream end of the element 11b and the device 9.
  • the roller 12 is rotated by an associated motor and rotates an endless belt 13.
  • the endless belt 13 defines a transport path 13a which extends between an upstream end 14, where it bypasses the roller 12, and a downstream end, where it bypasses a wedge or saber element 16 to form, in longitudinal section. , a corner or beak.
  • the belt 13 bypasses the edge 17 of the saber 16, which is on the side opposite the roller 12.
  • the saber 16 is stationary and in particular does not cause the endless belt 13 which moves along both upper and lower sides of the sword 16 by turning at its ridge 17 or vertex.
  • the ridge 17 of the saber 16 is chanfelee cylmdriquement. Its radius of curvature, which corresponds to the inner radius of curvature of the belt at its downstream end, is for example 3.5 mm and may be in particular between 2 and 5 mm. As for the outer radius of curvature of the carpet at its downstream end, it is for example 9.5 mm and may be in particular between 6 and 12 mm.
  • the edge 17 is adjacent to two planar faces 18 and 19, on which the belt 13 is supported by along its return path to the roller 12. The faces 18 and 19 converge to the edge 17 at an angle of 24 ° (see Figure 3) and which can be understood between 10 ° and 35 °.
  • the downstream end of the upper element 11a is recessed, that is to say, more upstream, with respect to the downstream end of the lower element 11b.
  • the two elements are not arranged symmetrically with respect to the horizontal, but with respect to an upwardly inclined plane towards the needling machine, in particular at an angle of approximately 8 °, and which can be between 5 ° and 20 °.
  • the lower face 19 of the carpet of the upper element is inclined slightly downwards (in the direction from upstream to downstream), in particular at an angle of 5 ° relative to the horizontal, while that the upper face 18 of the lower element is inclined upwards by an angle of 12 ° relative to the horizontal.
  • the saber 16 consists of a row of prisms which are aligned in the transverse direction and which are biased in tension independently of each other. others in the longitudinal direction (that is, the upstream-downstream direction).
  • each prism has in its rear face opposite the edge 17 of the parallel bores, in which are engaged in a sliding manner of the plungers.
  • a tensioner of a helical compression spring is interposed between the bottom of the bore at the free end of the plunger so as to urge the prism in the opposite direction to the roller, as just said.
  • a belt made in the form of a modular belt said micro-step, some band-shaped sections are shown in longitudinal section in Figure 4.
  • the modular belt has sections Longitudinal members in the form of individual transverse strips extending parallel to the axis of the roll 12 and articulated to each other at their lateral edge, the width (i.e. the dimension in the upstream-downstream direction) carpet) of a section defining the pitch of the carpet.
  • This step is called a micro-step and may be equal to 8 mm, in particular be between 6 and 15 mm, preferably between 6 and 10 mm.
  • the wedge element is not circular in section is not rotated relative to its axis.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Abstract

Device (9) for transferring and/or introducing a fibre lap, in particular a non-woven lap, into a consolidation installation, in particular a mechanical or hydraulic installation, for example a needling loom, comprising at least one transfer member (11a; 11b) comprising at least one drive roller (12), at least one endless belt (13) extending between an upstream end and a downstream end (15) and at least one sword-shaped or wedge-shaped member, the at least one roller being arranged so as to rotate the endless belt on either side of the downstream end of the at least one sword-shaped or wedge-shaped or spout-shaped member in order to thereby reverse the belt at the apex of the wedge-shaped member, characterised in that the endless belt is a modular belt composed of sections (30) in the form of transverse strips hinged to each other.

Description

Dispositif de transfert et/ou d'introduction d'une nappe de fibres dans une installation de consolidation, notamment une aiguilleteuse. Device for transferring and / or introducing a sheet of fibers into a consolidation installation, in particular a needling machine.
La présente invention se rapporte à un dispositif de transfert et/ou d'introduction d'une nappe de fibres, notamment d'une nappe de non-tissé, dans une installation de consolidation, notamment une aiguilleteuse. The present invention relates to a device for transferring and / or introducing a web of fibers, in particular a nonwoven web, into a consolidation installation, in particular a needling machine.
On connaît déjà dans l'art antérieur un dispositif de transfert qui assure l'introduction d'une nappe de fibres issue d'un étaleur-nappeur entre les tables d'une aiguilleteuse. Le dispositif comporte deux éléments, respectivement supérieur et inférieur, définissant entre eux un interstice, dont l'épaisseur décroît en direction de 1 ' aiguilleteuse et dans lequel passe la nappe, chaque élément comportant un rouleau, un tapis sans fin contournant le rouleau en amont et un prisme en aval pour y former une région en forme de coin ou bec au niveau de l'entrée de 1 ' aiguilleteuse , l'interstice guidant la nappe à l'entrée des tables de 1 ' aiguilleteuse . It is already known in the prior art a transfer device which ensures the introduction of a layer of fibers from a crosslapper between the tables of a needling machine. The device comprises two elements, respectively upper and lower, defining between them a gap, the thickness of which decreases in the direction of 1 needling machine and in which passes the web, each element comprising a roller, an endless belt bypassing the roll upstream and a downstream prism for forming a wedge-shaped region at the entry of the needling machine, the interstice guiding the web at the entrance to the tables of the needling machine.
Bien que ces systèmes de l'art antérieur présentent un avantage appréciable par rapport aux dispositifs qui existaient préalablement, limitant notamment l'étirage nécessaire pour l'introduction de la nappe dans 1 ' aiguilleteuse grâce à un entraînement au plus près des premières aiguilles, ils sont cependant de structure compliquée, nécessitant notamment que les becs soient réalisés sous la forme de rangées de sous becs alignés en direction transversale et mobiles les uns par rapport aux autres dans la direction longitudinale et qui comportent des moyens pour faire se déplacer longitudinalement chaque sous bec indépendamment des autres. D'autre part, ces dispositifs ne sont pas adaptés parfaitement au guidage d'une nappe très large par rapport à la longueur du dispositif d'introduction et/ou lourde et des améliorations sont souhaitées en ce qui concerne la qualité et l'homogénéité de la nappe introduite dans le dispositif de consolidation et donc de la nappe consolidée produite en sortie, ainsi que la fiabilité dans le temps du dispositif de transfert, notamment concernant la durée de vie des tapis sans fin ou bandes transporteuses . Although these systems of the prior art have an appreciable advantage over previously existing devices, limiting in particular the stretching necessary for the introduction of the web into the needling machine through a drive closer to the first needles, they However, they are complicated in structure, requiring in particular that the nozzles be made in the form of rows of sub-nozzles aligned in transverse direction and movable relative to each other. others in the longitudinal direction and which include means for longitudinally moving each under nozzle independently of the others. On the other hand, these devices are not perfectly adapted to guide a very wide web with respect to the length of the introduction device and / or heavy and improvements are desired as regards the quality and homogeneity of the web introduced into the consolidation device and thus the consolidated sheet produced at the output, as well as the reliability over time of the transfer device, in particular concerning the service life of the endless belts or conveyor belts.
De EP 2 175 056, on connaît un dispositif de transfert d'une nappe de fibres vers une aiguilleteuse, comportant au moins un élément de transfert comportant au moins un rouleau d'entraînement et au moins un tapis sans fin s 'étendant entre une extrémité amont et une extrémité aval, le au moins un rouleau étant agencé de manière à entraîner en rotation le tapis sans fin. A l'extrémité aval, le tapis sans fin contourne un rouleau de grand diamètre qui ne permet pas d'acheminer la nappe au plus près de la table d ' aiguilletage et nécessite de prévoir des rouleaux de transfert supplémentaires entre le tapis sans fin et la table d ' aiguilletage . From EP 2 175 056, there is known a device for transferring a sheet of fibers to a needling machine, comprising at least one transfer element comprising at least one drive roller and at least one endless belt extending between one end upstream and downstream end, the at least one roller being arranged to drive in rotation the endless belt. At the downstream end, the endless belt circumvents a roll of large diameter which does not allow to convey the web closer to the needling table and requires the provision of additional transfer rollers between the endless belt and the needling table.
De EP 1 790 766, on connaît un dispositif de transfert d'une nappe de fibres vers une aiguilleteuse, comportant un convoyeur comportant un tapis sans fin à lattes qui achemine la nappe à deux éléments de transfert en forme de coin disposés fixes par rapport à l'entrée de 1 ' aiguilleteuse et a travers lesquels passent des jets d'eau destinés à maintenir la nappe, voire à la comprimer. Ce système est compliqué, notamment en raison de la nécessité de créer des jets d'eau, et en outre, compte tenu de leur denture, ces éléments en forme de coin ne peuvent pas être disposés très proches de l'entrée de 1 ' aiguilleteuse . De même, le convoyeur à lattes est maintenu à grande distance de 1 ' aiguilleteuse . From EP 1 790 766, there is known a device for transferring a sheet of fibers to a needling machine, comprising a conveyor comprising an endless slatted belt which conveys the sheet to two wedge-shaped transfer elements arranged fixed with respect to the entrance of 1 'needling and through which pass jets of water to maintain the tablecloth, or to compress it. This system is complicated, in particular because of the need to create water jets, and furthermore, given their teeth, these wedge-shaped elements can not be arranged very close to the entrance of the needling machine. . Likewise, the slatted conveyor is kept at a great distance from the needling machine.
La présente invention vise à surmonter les inconvénients de l'art antérieur en proposant un dispositif de transfert et/ou d'introduction d'une nappe de fibres, notamment de non-tissé, dans une installation de consolidation, notamment mécanique ou hydraulique, par exemple une aiguilleteuse, qui permet d'amener la nappe à consolider au plus près de la zone d'action de consolidation, par exemple au plus près de la zone d'action des aiguilles d'une aiguilleteuse, et ce sans avoir ni à effectuer sur la nappe des traitements, par exemple un étirage, pouvant avoir pour conséquence une détérioration, notamment en terme d'homogénéité, de la nappe introduite, et donc en sortie de la nappe consolidée produite, obtenue, ni à prévoir un système complexe . The present invention aims at overcoming the drawbacks of the prior art by proposing a device for transferring and / or introducing a web of fibers, in particular nonwoven fibers, into a consolidation installation, particularly mechanical or hydraulic, by means of a needling machine, which makes it possible to bring the sheet to consolidate closer to the consolidation action zone, for example closer to the action zone of the needles of a needling machine, without having to perform on the web of treatments, for example stretching, which may result in a deterioration, especially in terms of homogeneity, of the introduced web, and therefore output of the consolidated web produced, or to provide a complex system.
De WO 89/03446, on connaît un dispositif suivant le préambule de la revendication 1. From WO 89/03446 there is known a device according to the preamble of claim 1.
Suivant l'invention, un dispositif de transfert et/ou d'introduction d'une nappe de fibres, notamment d'une nappe de non-tissé, dans une installation de consolidation, notamment mécanique ou hydraulique, par exemple une aiguilleteuse , est tel que défini à la revendication 1, des perfectionnements et modes de réalisation préférés étant définis aux sous- revendications . According to the invention, a device for transferring and / or introducing a web of fibers, in particular a nonwoven web, into a consolidation plant, particularly mechanical or hydraulic, by A needling machine is as defined in claim 1, with improvements and preferred embodiments being defined in the subclaims.
En prévoyant ainsi un tapis sous forme modulaire a pas très fin, on peut réaliser l'extrémité aval du tapis avec une grande finesse, ce qui permet de la positionner au plus près du dispositif de consolidation, et ce sans avoir à réaliser sur la nappe transférée des traitements, tels qu'un étirement, susceptibles de la détériorer. En outre, le dispositif de transfert peut être grandement simplifié par rapport aux dispositifs existants, et ce pour une qualité au moins identique, voire supérieure, de la nappe consolidée. By thus providing a carpet in modular form not very fine, we can achieve the downstream end of the carpet with great finesse, which allows to position it closer to the consolidation device, and without having to perform on the tablecloth transferred from treatments, such as stretching, which may cause deterioration. In addition, the transfer device can be greatly simplified compared to existing devices, and for a quality at least the same, or even higher, of the consolidated web.
De préférence, la largeur d'une bande transversale c'est-à-dire le pas du tapis modulaire, est compris entre 6 mm et 15 mm. Preferably, the width of a transverse band, that is to say the pitch of the modular mat, is between 6 mm and 15 mm.
Suivant un mode de réalisation préféré, le rayon de courbure intérieur du ou de chaque tapis au niveau de son extrémité aval, est par exemple de 3,5 mm et peut être compris notamment entre 2 et 5 mm. According to a preferred embodiment, the inner radius of curvature of the or each belt at its downstream end is for example 3.5 mm and may be in particular between 2 and 5 mm.
Suivant un mode de réalisation préféré, le rayon de courbure extérieur du ou de chaque tapis au niveau de son extrémité aval est compris notamment entre 6 et 12 mm. De préférence, le dispositif comporte deux éléments de transfert, respectivement supérieur et inférieur, définissant entre eux un interstice par lequel passe la nappe pendant son transfert, de préférence en définissant entre eux un interstice dont l'épaisseur diminue de 1 ' amont vers 1 ' aval . According to a preferred embodiment, the outer radius of curvature of the or each carpet at its downstream end is in particular between 6 and 12 mm. Preferably, the device comprises two transfer elements, respectively upper and lower, defining between them a gap through which the web passes during its transfer, preferably by defining between them a gap whose thickness decreases from 1 upstream to 1 downstream.
De préférence, l'extrémité aval de l'un des éléments est en retrait, c'est-à-dire plus en amont, par rapport à l'extrémité aval de l'autre élément. Preferably, the downstream end of one of the elements is recessed, that is to say, further upstream, with respect to the downstream end of the other element.
La présente invention se rapporte également à un ensemble comportant un dispositif de consolidation, notamment mécanique et/ou hydraulique, par exemple une aiguilleteuse et un dispositif suivant l'invention, ainsi qu'à une installation comportant un étaleur-nappeur et un ensemble suivant l'invention. The present invention also relates to an assembly comprising a consolidation device, particularly mechanical and / or hydraulic, for example a needling machine and a device according to the invention, and to an installation comprising a crosslapper and a set following the 'invention.
A titre d'exemple, on décrit maintenant un mode de réalisation préféré de l'invention en se reportant aux dessins dans lesquels : la figure 1 représente un ensemble suivant un mode de réalisation de l'invention comportant un dispositif de transfert et/ou d'introduction suivant un mode de réalisation de l'invention et une aiguilleteuse ; la figure 2 est une vue en coupe longitudinale de l'interface entre l'extrémité des éléments de transfert inférieur et supérieur et les tôles de table et débourreur d'une aiguilleteuse présentant notamment la position de la première aiguille par rapport au dispositif de transfert de la figure 1 ; la figure 3 est une vue en coupe longitudinale de l'élément de transfert inférieur du dispositif de transfert de la figure 1 ; et la figure 4 est une vue en coupe longitudinale d'une partie du tapis sans fin du dispositif des figures 1 à 3. By way of example, a preferred embodiment of the invention will now be described with reference to the drawings in which: FIG. 1 represents an assembly according to an embodiment of the invention comprising a transfer device and / or introduction according to one embodiment of the invention and a needling machine; FIG. 2 is a longitudinal sectional view of the interface between the end of the lower and upper transfer elements and the table and stripper sheets of a needling machine, in particular having the position of the first needle relative to the transfer device of Figure 1; Figure 3 is a longitudinal sectional view of the lower transfer member of the transfer device of Figure 1; and Figure 4 is a longitudinal sectional view of a portion of the endless belt of the device of Figures 1 to 3.
A la figure 1, il est représente une aiguilleteuse comportant une tôle supérieure 1 appelée débourreur et une tôle inférieure 2 appelée table définissant entre elles un passage d ' aiguilletage sensiblement horizontal, dans lequel on fait avancer une nappe 3, qui, entrant à l'état de nappe formée de fibres peu ou pas liées entre elles, sort à l'état de nappe ou tapis 4 aiguilleté. Une planche à aiguilles 6 est reliée à un mécanisme de déplacement en va-et-vient 7 de façon que les aiguilles 8 portées par la planche 6 entrent dans le passage d ' aiguilleteuse à travers des orifices appropriés de la table 1 et sortent dudit passage, à fréquence déterminée. De manière connue, ceci entrecroise les fibres de la nappe 3 et confère cohésion et tenue mécanique à la nappe 4 obtenue en sortie. In Figure 1, there is shown a needling comprising an upper sheet 1 called stripper and a lower plate 2 called table defining between them a substantially horizontal needling passage, in which is advanced a sheet 3, which entering the state of web formed of fibers little or not bonded together, comes out in the form of a sheet or carpet 4 needled. A needle board 6 is connected to a reciprocating mechanism 7 so that the needles 8 carried by the board 6 enter the needling passage through appropriate holes in the table 1 and out of said passage. , at a fixed frequency. In a known manner, this intersects the fibers of the ply 3 and gives cohesion and mechanical strength to the ply 4 obtained at the outlet.
En amont du passage d ' aiguilletage , l'installation comporte un dispositif 9 de transfert et/ou d'introduction, dont le rôle est de transférer la nappe 3 de non-tissé issue d'un étaleur-nappeur (non représenté aux figures), avec le moins d'étirage possible, à l'intérieur du passage d ' aiguilletage . Le dispositif 9 peut également avoir une fonction de pré-compression de la nappe. Le dispositif 9 d'introduction comporte un élément lia de transfert supérieur et un élément 11b de transfert inférieur sensiblement identiques. Ci-dessous, on décrit l'élément 11b inférieur. La même description s'applique à l'élément lia supérieur. Upstream of the needling passage, the installation comprises a device 9 for transferring and / or introducing, whose role is to transfer the nonwoven web 3 from a spreader-lapper (not shown in the figures). , with the least stretching possible, inside the needling passage. The device 9 may also have a pre-compression function of the web. The introduction device 9 comprises an upper transfer member 11a and a substantially identical lower transfer member 11b. Below, the lower element 11b is described. The same description applies to the upper lia element.
L'élément 11b de transfert comporte un rouleau ou un arbre transversal muni d'un grand nombre de pignons répartis sur la largeur 12 situé à l'extrémité amont de l'élément 11b et du dispositif 9. Le rouleau 12 est entraîné en rotation par un moteur associé et entraîne en rotation un tapis 13 sans fin. Le tapis 13 sans fin définit un trajet 13a de transport qui s'étend entre une extrémité 14 amont, où il contourne le rouleau 12, et une extrémité 15 aval, où il contourne un élément formant coin ou sabre 16 pour former, en section longitudinale, un coin ou bec. Le tapis 13 contourne l'arête 17 du sabre 16, qui est du côté opposé au rouleau 12. Le sabre 16 est immobile et notamment n'entraîne pas le tapis sans fin 13 qui se déplace de long des deux côtés supérieur et inférieur du sabre 16 en se retournant au niveau de son arête 17 ou sommet. The transfer element 11b comprises a roller or a transverse shaft provided with a large number of gears distributed over the width 12 located at the upstream end of the element 11b and the device 9. The roller 12 is rotated by an associated motor and rotates an endless belt 13. The endless belt 13 defines a transport path 13a which extends between an upstream end 14, where it bypasses the roller 12, and a downstream end, where it bypasses a wedge or saber element 16 to form, in longitudinal section. , a corner or beak. The belt 13 bypasses the edge 17 of the saber 16, which is on the side opposite the roller 12. The saber 16 is stationary and in particular does not cause the endless belt 13 which moves along both upper and lower sides of the sword 16 by turning at its ridge 17 or vertex.
L' arête 17 du sabre 16 est chanfremee cylmdriquement. Son rayon de courbure, qui correspond au rayon de courbure intérieur du tapis au niveau de son extrémité aval, est par exemple de 3,5 mm et peut être compris notamment entre 2 et 5 mm. Quant au rayon de courbure extérieur du tapis au niveau de son extrémité aval, il est par exemple de 9,5 mm et peut être compris notamment entre 6 et 12 mm. L'arête 17 est adjacente à deux faces planes 18 et 19, sur lesquelles le tapis 13 s'appuie le long de son trajet de transport aller et le long de son trajet de retour vers le rouleau 12. Les faces 18 et 19 convergent vers l'arête 17 suivant un angle qui est de 24° (voir la figure 3) et qui peut être compris entre 10° et 35°. The ridge 17 of the saber 16 is chanfremee cylmdriquement. Its radius of curvature, which corresponds to the inner radius of curvature of the belt at its downstream end, is for example 3.5 mm and may be in particular between 2 and 5 mm. As for the outer radius of curvature of the carpet at its downstream end, it is for example 9.5 mm and may be in particular between 6 and 12 mm. The edge 17 is adjacent to two planar faces 18 and 19, on which the belt 13 is supported by along its return path to the roller 12. The faces 18 and 19 converge to the edge 17 at an angle of 24 ° (see Figure 3) and which can be understood between 10 ° and 35 °.
Comme on peut le voir a la figure 3, l'extrémité aval de l'élément lia supérieur est en retrait, c'est-à-dire plus en amont, par rapport à l'extrémité aval de l'élément 11b inférieur. D'autre part, les deux éléments ne sont pas disposés symétriquement par rapport à l'horizontale, mais par rapport à un plan incliné vers le haut en direction de l' aiguilleteuse, notamment d'un angle d'environ 8°, et qui peut être compris entre 5° et 20°. En particulier, la face 19 inférieure du tapis de l'élément supérieur est inclinée légèrement vers le bas (dans la direction de l'amont vers l'aval), notamment d'un angle de 5° par rapport à l'horizontale, tandis que la face 18 supérieure de l'élément inférieur est inclinée vers le haut d'un angle de 12° par rapport à l'horizontale. As can be seen in FIG. 3, the downstream end of the upper element 11a is recessed, that is to say, more upstream, with respect to the downstream end of the lower element 11b. On the other hand, the two elements are not arranged symmetrically with respect to the horizontal, but with respect to an upwardly inclined plane towards the needling machine, in particular at an angle of approximately 8 °, and which can be between 5 ° and 20 °. In particular, the lower face 19 of the carpet of the upper element is inclined slightly downwards (in the direction from upstream to downstream), in particular at an angle of 5 ° relative to the horizontal, while that the upper face 18 of the lower element is inclined upwards by an angle of 12 ° relative to the horizontal.
Suivant un mode de réalisation possible, mais dont on peut se dispenser sans sortir du cadre de l'invention, le sabre 16 est constitué d'une rangée de prismes qui sont alignés dans la direction transversale et qui sont sollicités en tension indépendamment les uns des autres dans la direction longitudinale (c'est-à-dire la direction amont-aval) . Pour cela, chaque prisme présente dans sa face arrière opposée à l'arête 17 des alésages parallèles, dans lesquels sont engagés de manière coulissante des plongeurs. Un tendeur d'un ressort hélicoïdal de compression est interposé entre le fond de l'alésage à l'extrémité libre du plongeur de manière à solliciter le prisme en direction opposée au rouleau, comme il vient d'être dit. Cependant, on pourrait également, au lieu de prévoir une pluralité de prismes, indépendants les uns des autres, ne prévoir qu'un unique sabre, qui s'étend sur toute la largeur du tapis et qui peut être mis en tension longitudinale par un tendeur 60, comme représenté aux figures. According to one possible embodiment, but which can be dispensed with without departing from the scope of the invention, the saber 16 consists of a row of prisms which are aligned in the transverse direction and which are biased in tension independently of each other. others in the longitudinal direction (that is, the upstream-downstream direction). For this, each prism has in its rear face opposite the edge 17 of the parallel bores, in which are engaged in a sliding manner of the plungers. A tensioner of a helical compression spring is interposed between the bottom of the bore at the free end of the plunger so as to urge the prism in the opposite direction to the roller, as just said. However, one could also, instead of providing a plurality of prisms, independent of each other, provide only one sword, which extends over the entire width of the carpet and which can be put in longitudinal tension by a tensioner 60, as shown in the figures.
Suivant l'invention, en effet, on prévoit un tapis réalisé sous la forme d'un tapis modulaire dit à micro- pas, dont quelques tronçons en forme de bande sont représentés en coupe longitudinale à la figure 4. Le tapis modulaire comporte des tronçons 30 longitudinaux en forme de bandes transversales individuelles s' étendant parallèlement à l'axe du rouleau 12 et articulées les unes aux autres au niveau de leur bord latéral, la largeur (c'est-à-dire la dimension dans la direction amont-aval du tapis) d'un tronçon définissant le pas du tapis. Ce pas est dit un micro-pas et peut être égal à 8 mm, notamment être compris entre 6 et 15 mm, de préférence entre 6 et 10 mm. According to the invention, in fact, there is provided a belt made in the form of a modular belt said micro-step, some band-shaped sections are shown in longitudinal section in Figure 4. The modular belt has sections Longitudinal members in the form of individual transverse strips extending parallel to the axis of the roll 12 and articulated to each other at their lateral edge, the width (i.e. the dimension in the upstream-downstream direction) carpet) of a section defining the pitch of the carpet. This step is called a micro-step and may be equal to 8 mm, in particular be between 6 and 15 mm, preferably between 6 and 10 mm.
L'articulation d'une bande transversale à la suivante s'effectue directement de l'une à l'autre par l'intermédiaire de têtons 31 qui s'insèrent dans des trous 32 à la manière d'une charnière de porte. The articulation of a transverse strip to the next is effected directly from one to the other by means of studs 31 which fit into holes 32 in the manner of a door hinge.
En prévoyant ainsi un tapis modulaire, on peut obtenir une épaisseur très faible du tapis, notamment au niveau de l'arête 17 du sabre 16 pour permettre de faire s'étendre l'interstice formé entre les deux éléments lia et 11b de transfert jusqu'à un point très proche de l'entrée de 1 ' aiguilleteuse par rapport aux dispositifs connus de l'art antérieur. Ceci permet en particulier de s'affranchir notamment d'un système tel que décrit dans WO 89/03446 et qui est décrit également plus haut comme étant un mode de réalisation possible, mais non nécessaire, consistant à prévoir une pluralité de prismes qui sont mobiles les uns par rapport aux autres par l'intermédiaire de dispositifs associés de mise sous tension. Ainsi, suivant l'invention, on peut si on le souhaite réaliser un tapis ayant une structure bien plus simple, tout en permettant l'amenée de la nappe au plus près de 1 ' aiguilleteuse . By thus providing a modular carpet, it is possible to obtain a very small thickness of the carpet, especially at the edge 17 of the saber 16 to allow the interstice formed between the two elements 11 and 11b of transfer to a point very close to the entry of the needling machine with respect to the known devices of the prior art. This makes it possible in particular to overcome, in particular, a system as described in WO 89/03446 and which is also described above as being a possible, but not necessary, embodiment of providing a plurality of prisms that are movable. relative to each other via associated power-on devices. Thus, according to the invention, it is possible, if desired, to produce a carpet having a much simpler structure, while allowing the sheet to be brought as close as possible to the needling machine.
En particulier, suivant l'invention, l'élément formant coin n'est pas de section circulaire n'est pas entraîné en rotation par rapport à son axe. In particular, according to the invention, the wedge element is not circular in section is not rotated relative to its axis.

Claims

REVENDICATIONS
Dispositif (9) de transfert et/ou d'introduction d'une nappe de fibres, notamment d'une nappe de non- tissé, dans une installation de consolidation, notamment mécanique ou hydraulique, par exemple une aiguilleteuse, comportant au moins un élément (lia ;llb) de transfert comportant au moins un rouleau (12) d'entraînement, au moins un tapis (13) sans fin s 'étendant entre une extrémité amont et une extrémité (15) aval et au moins un élément en forme de sabre ou coin, le au moins un rouleau étant agencé de manière à entraîner le tapis sans fin pour effectuer un retournement du tapis autour du coin à l'extrémité aval, caractérisé en ce que le tapis sans fin est un tapis modulaire constitué de tronçons (30) en forme de bandes transversales articulées les unes aux autres. Device (9) for transferring and / or introducing a ply of fibers, in particular of a nonwoven web, into a consolidation installation, in particular a mechanical or hydraulic system, for example a needling machine, comprising at least one element transfer member (11a) including at least one drive roller (12), at least one endless belt (13) extending between an upstream end and a downstream end (15) and at least one saber or wedge, the at least one roller being arranged to drive the endless belt to perform a reversal of the belt around the corner at the downstream end, characterized in that the endless belt is a modular carpet consisting of sections ( 30) in the form of transverse strips articulated to each other.
Dispositif suivant la revendication 1, caractérisé en ce que la largeur d'un tronçon (30), c'est-à-dire le pas du tapis articulé, est comprise entre 6 et 15 mm. Device according to claim 1, characterized in that the width of a section (30), that is to say the pitch of the hinged mat, is between 6 and 15 mm.
Dispositif suivant la revendication 1 ou 2, caractérisé en ce que le rayon de courbure intérieur du tapis au niveau de son extrémité aval est compris entre 2 et 5 mm. Dispositif suivant l'une des revendications 1 a 3, caractérisé en ce que le rayon de courbure extérieur du tapis au niveau de son extrémité aval est compris entre 6 et 12 mm. Device according to claim 1 or 2, characterized in that the inner radius of curvature of the belt at its downstream end is between 2 and 5 mm. Device according to one of claims 1 to 3, characterized in that the outer radius of curvature of the belt at its downstream end is between 6 and 12 mm.
Dispositif suivant l'une des revendication 1 a 4, caractérisé en ce que le dispositif comporte deux éléments de transfert, respectivement supérieur et inférieur, définissant entre leurs sabres respectifs un interstice par lequel passe la nappe pendant son transfert . Device according to one of claims 1 to 4, characterized in that the device comprises two transfer elements, respectively upper and lower, defining between their respective sabers a gap through which the web passes during its transfer.
Dispositif suivant la revendication 5, caractérise en ce que les deux éléments de transfert définissent entre eux un interstice dont l'épaisseur diminue de l'amont vers l'aval. Device according to claim 5, characterized in that the two transfer elements define between them a gap whose thickness decreases from upstream to downstream.
7. Dispositif suivant la revendication 5 ou 6, caractérisé en ce que l'extrémité aval de l'un des éléments (lia ; 11b) est en retrait, c'est-à dire- plus en amont, par rapport à l'extrémité aval de l'autre élément (11b ; lia) . 8. Dispositif suivant l'une des revendications précédentes, caractérisé en ce que les bandes transversales sont articulées le long de leur bord transversal respectif. 9. Dispositif suivant l'une des revendications 1 à 8, caractérisé en ce que le ou chaque élément de transfert comporte un unique tapis sans fin et un unique élément en forme de sabre ou coin. 7. Device according to claim 5 or 6, characterized in that the downstream end of one of the elements (11a; 11b) is recessed, that is to say- further upstream, with respect to the end downstream of the other element (11b; 11a). 8. Device according to one of the preceding claims, characterized in that the transverse strips are articulated along their respective transverse edge. 9. Device according to one of claims 1 to 8, characterized in that the or each element of Transfer features a unique endless carpet and a unique saber-shaped element or wedge.
Ensemble comportant un dispositif de consolidation, notamment mécanique et/ou hydraulique, par exemple une aiguilleteuse, et un dispositif suivant l'une des revendications précédentes. Assembly comprising a consolidation device, particularly mechanical and / or hydraulic, for example a needling machine, and a device according to one of the preceding claims.
11. Installation comportant un étaleur-nappeur et un ensemble suivant la revendication précédente. 11. Installation comprising a crosslapper and an assembly according to the preceding claim.
PCT/EP2018/055718 2017-03-09 2018-03-08 Device for transferring and/or introducing a fibre lap into a consolidation installation, in particular a needling loom WO2018162624A1 (en)

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CN201880016707.8A CN110382753B (en) 2017-03-09 2018-03-08 Device for transferring and/or inserting fibre sheets into a consolidation device, in particular a flocking machine
EP18709012.1A EP3592886B1 (en) 2017-03-09 2018-03-08 Device for transferring and/or introducing a fibre lap into a consolidation installation, in particular a needling loom

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FR1770232 2017-03-09
FR1770232A FR3063742B1 (en) 2017-03-09 2017-03-09 DEVICE FOR THE TRANSFER AND / OR INTRODUCTION OF A FIBER BED IN A CONSOLIDATION INSTALLATION, IN PARTICULAR A NEEDLE MACHINE

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CN110382753B (en) 2023-02-17
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FR3063742A1 (en) 2018-09-14
FR3063742B1 (en) 2021-06-18
EP3592886B1 (en) 2023-05-10

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