EP2712679B1 - Curved perforated plate - Google Patents

Curved perforated plate Download PDF

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Publication number
EP2712679B1
EP2712679B1 EP13005660.9A EP13005660A EP2712679B1 EP 2712679 B1 EP2712679 B1 EP 2712679B1 EP 13005660 A EP13005660 A EP 13005660A EP 2712679 B1 EP2712679 B1 EP 2712679B1
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EP
European Patent Office
Prior art keywords
wafer
perforations
jets
water
curved surface
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EP13005660.9A
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German (de)
French (fr)
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EP2712679A1 (en
Inventor
Frédéric NOELLE
Christian Decolin
Florent Veillet
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Andritz Perfojet SAS
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Andritz Perfojet SAS
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Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
    • B05B1/20—Arrangements of several outlets along elongated bodies, e.g. perforated pipes or troughs, e.g. spray booms; Outlet elements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
    • B05B1/26—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with means for mechanically breaking-up or deflecting the jet after discharge, e.g. with fixed deflectors; Breaking-up the discharged liquid or other fluent material by impinging jets

Definitions

  • the present invention relates to devices for jetting water jets, particularly useful for the hydraulic bonding of nonwoven fibers.
  • This bonding consists in sending a curtain of pressurized water jets formed by a perforated wafer on a fiber web to entangle them and form them in a coherent web, without requiring the use of binder or resin.
  • the minimum distance between jets from elsewhere difficult to obtain is slightly less than 0.5 mm. This manufacturing limit is due to mechanical reasons, since it must necessarily have a minimum of material between each perforation so that the wafer has a mechanical strength correct in time. There is therefore a distance between each jet line marking on the nonwoven slightly less than 0.5 mm, this distance corresponding to the distance between each perforation of the wafer.
  • the invention provides a perforated plate according to claim 1.
  • the water spray device comprises a body defining a chamber and delimiting a longitudinal outlet on the outside, a single plate, in one piece and provided with perforations being interposed between the chamber and the outlet, being supported. by two longitudinal spans as described in WO 03/070378 .
  • the two longitudinal bearings are curved along a curved surface the same longitudinal generator, which turns its concavity towards the exit.
  • the perforations are of revolution and their fictitious axis is normal to the curved surface. They are thus easy to machine.
  • the cross-sectional curve of this curved surface is preferably a circle, but it may also be constituted by the strings of a portion of a regular polygon inscribed in a circle, the axes of the perforations passing through the middle of the strings.
  • the jets of water converge at the center of the circle and the veil to be consolidated by the jets of water is preferably arranged so that the center of the circle is in the middle of the veil, the distance between the member carrying the web (T), conveyor or drum, carrying the web and the point of the lower face of the wafer which is furthest from it being generally between 10 mm and 50 mm, preferably between 20 mm and 40 mm. mm.
  • the curved surface may also have an elliptical or parabolic cross section.
  • the perforations of the plate can to be staggered, the points of impact of the jets on the veil then succeeding on the same line in a very close manner.
  • the perforations are aligned along lines perpendicular to longitudinal rows of perforations. Usually, there are 2 to 6 rows in this case. But there can also be a single row of perforations.
  • the diameter of the perforations is between 50 microns and 250 microns and the distance between two adjacent perforations between 0.4 mm and 30 mm. Preferably the distance between each row of perforations is between 0.4 mm and 3 mm.
  • the wafer generally has a thickness of between 0.5 mm and 5 mm, preferably between 0.6 mm and 1.4 mm.
  • the longitudinal free edge of one of the spans is further from the chamber than the longitudinal free edge of the other span.
  • the wafer is mounted in a position where it intersects the plane of sending the water defined by the passage putting the chamber in communication with the outlet, but where it is not symmetrical with respect to this plane.
  • This arrival at an angle that can be between 70 and 90 degrees, on the sail reduces the bounces of the jets in them. orienting at best.
  • This arrival is all the better that the width of the outlet is between 1 mm and 10 mm, preferably between 2 mm and 5 mm.
  • the wafer is supported by a single wafer holder. , in one piece, the same curvature as the plate and open next to the exit.
  • the wafer holder is placed in the jets of water jet device while it supports a wafer according to the invention, while, to put a wafer of the old type the wafer holder is removed and the wafer is supported by a conventional wafer holder accommodating a flat wafer.
  • the longitudinal output device for sending water under pressure generally comprises a body and a jaw fixed to the body so as to retain the perforated plate sustained or not by a wafer holder.
  • the longitudinal chamber preferably cylindrical, is machined in the body and is supplied with water compressed by one of the end faces.
  • the longitudinal passage for sending water under pressure on the perforated plate extends over the entire longitudinal dimension of the body and opens into a distribution chamber defined by the jaw and in which the plate is supported, the jaw defining below. of the wafer the exit opening of the jets towards a veil conveying means, generally an endless perforated conveyor belt or a perforated drum.
  • the median longitudinal plane of the outlet is inclined relative to the median longitudinal plane of the passage.
  • a water jet nonwoven consolidation plant comprising a transport member (T) of the nonwoven in front of a jet jetting device.
  • the device is as defined above and the smallest distance between the transport element and the point of the lower face of the wafer furthest from the transport element is between 10 mm and 50 mm.
  • the invention relates to a perforated plate according to claim 1.
  • the one-piece plate represented in the figure 1 is substantially rectangular, but is precurved along a curved surface turning its concavity downward.
  • the stainless steel plate 1 has two rows of perforations whose fictitious axes 2 are normal to the arc of circle of the plate 1 turning its convexity upwards.
  • the fictitious axes 2 illustrate the path of the jets of water converging at point A.
  • the water spray device comprises a body 4 consisting of a body itself and a jaw 5 steel fixed below the body in a sealed manner.
  • a cylindrical water supply chamber 6 at a pressure of 400 bar, the water supply source communicating with the chamber 6 by a front end of the body 4 which is above the plane of the blueprint.
  • This single chamber 6 communicates through a single longitudinal passage 7 'extending over the entire longitudinal extent of the body. but closed on both front faces.
  • This passage opens into a space defined by the two parts of the jaw at the bottom of which is the single wafer 1 following the figure 1 .
  • Between the two parts of the jaw 5 is defined below the wafer an outlet 7 through which the jets 2 of water can out of the water jet device.
  • the jaw On either side of the outlet 7, the jaw defines two bearing surfaces 3 curved along a curved surface which turns its concavity towards the outlet 7.
  • the two bearing surfaces 3 are defined by the same longitudinal generatrix. They face the room 6 and are on both sides of the passage 7 '.
  • the water jet projection device shown in FIG. figure 3 differs from that shown in figure 2 in that the wafer 1 is flat, but is sufficiently flexible to bend under the effect of the pressure of water, so that it matches the curved shape of a single wafer holder 8, a only holding, which, just like the plate 1, extends over the entire longitudinal dimension of the device for jetting water jets.
  • the upper face of this wafer holder 8 has a curved surface that the wafer 1 wife.
  • each perforation of the middle row is disposed between two perforations of the left row.
  • Each perforation of the right row is arranged between two perforations of the central row, but also between two perforations of the left row.
  • the perforations are arranged in three rows, the perforations are aligned so not in staggered rows and the middle row gives a jet arriving perpendicularly on the web 10.
  • the wafer is constituted by three ropes 11, 12, 13 of arcs of an imaginary circle 14 of center 15 located on the nonwoven.
  • the perforations are perpendicular to the strings and their imaginary axis is perpendicular to the string 11, 12, 13.
  • the perforations are arranged in staggered rows.
  • the wafer 16 is inclined relative to the median longitudinal X plane of the chamber 6 defined by the passage 7 'and the median longitudinal Y plane of the outlet 7 is inclined relative to the median longitudinal X plane of the passage 7'.
  • the jets coming out of the wafer 16 arrive on the nonwoven web 10, supported by a rotating drum (T) in the direction of the clockwise, as indicated by the arrow (F), downstream from where they would arrive if the plate 16 was not inclined.
  • the two parts of the jaw themselves each have an inclined bearing the wafer and define an opening under the wafer for the outlet 7 of the jets.
  • the mode of realization of the figure 17 corresponds to that of the figure 16 , but this time the wafer 16 is supported by a wafer holder 17 itself having a curved surface or bearing that of the wafer, while its surface 18 by which it is supported on the jaw is a flat surface so that by replacing the wafer holder 17 with a conventional wafer holder, the jet projecting device can also be operated with a conventional planar wafer.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Nozzles (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Special Spraying Apparatus (AREA)
  • Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)

Description

La présente invention se rapporte aux dispositifs de projection de jets d'eau, utiles notamment pour le liage hydraulique de fibres en des non tissé. Ce liage consiste à envoyer un rideau de jets d'eau sous pression formé par une plaquette perforée sur un voile de fibres pour les enchevêtrer et les former en une nappe cohérente, sans nécessiter l'utilisation de liant ou de résine.The present invention relates to devices for jetting water jets, particularly useful for the hydraulic bonding of nonwoven fibers. This bonding consists in sending a curtain of pressurized water jets formed by a perforated wafer on a fiber web to entangle them and form them in a coherent web, without requiring the use of binder or resin.

La distance minimale entre les jets d'ailleurs difficile à obtenir est légèrement inférieure à 0,5 mm. Cette limite de fabrication est due à des raisons mécaniques, puisqu'il faut avoir nécessairement un minimum de matière entre chaque perforation afin que la plaquette ait une tenue mécanique correcte dans le temps. Il y a donc une distance entre chaque marquage de ligne de jets sur le non tissé légèrement inférieure à 0,5 mm, cette distance correspondant à la distance entre chaque perforation de la plaquette.The minimum distance between jets from elsewhere difficult to obtain is slightly less than 0.5 mm. This manufacturing limit is due to mechanical reasons, since it must necessarily have a minimum of material between each perforation so that the wafer has a mechanical strength correct in time. There is therefore a distance between each jet line marking on the nonwoven slightly less than 0.5 mm, this distance corresponding to the distance between each perforation of the wafer.

On souhaite pourtant obtenir un marquage de lignes de jet (ou lignage) très fin sur des non tissé par des jets d'eau très proches les uns des autres dans le sens de la laize.However, it is desired to obtain a marking of jet lines (or lineage) very thin nonwoven by jets of water very close to each other in the direction of the width.

L'invention y pourvoit par une plaquette perforée selon la revendication 1.The invention provides a perforated plate according to claim 1.

Le dispositif de projection de jets d'eau comprend un corps définissant une chambre et délimitant une sortie longitudinale à l'extérieur, une plaquette unique, d'un seul tenant et munie de perforations étant interposée entre la chambre et la sortie, en étant supportée par deux portées longitudinales comme décrit au WO 03/070378 . Les deux portées longitudinales sont courbées suivant une surface courbée de même génératrice longitudinale, qui tourne sa concavité vers la sortie.The water spray device comprises a body defining a chamber and delimiting a longitudinal outlet on the outside, a single plate, in one piece and provided with perforations being interposed between the chamber and the outlet, being supported. by two longitudinal spans as described in WO 03/070378 . The two longitudinal bearings are curved along a curved surface the same longitudinal generator, which turns its concavity towards the exit.

Grâce à cette courbure, on peut par une seule et même plaquette et à l'aide d'une seule et même chambre d'alimentation de la plaquette en eau sous une pression comprise entre 50 bar et 1 000 bar, envoyer plusieurs jets sur une même ligne longitudinale du voile, considérée dans la direction de la plaquette, celui-ci passant sous la plaquette sur un convoyeur et la direction longitudinale ci-dessus correspondant à la largeur du voile. Les lignes de jets sur le voile sont ainsi très resserrées et la quantité d'eau reçue par une ligne est très grande. La plaquette peut être courbée soi-même. Elle peut aussi être plane, mais suffisamment souple pour épouser la forme des portées sous l'effet de la pression de l'eau.By virtue of this curvature, it is possible, by one and the same plate, and with the aid of a single supply chamber of the wafer, to supply water at a pressure of between 50 bar and 1000 bar, to send several jets on a single plate. same longitudinal line of the web, considered in the direction of the wafer, it passing under the wafer on a conveyor and the longitudinal direction above corresponding to the width of the web. The lines of jets on the sail are thus very tight and the amount of water received by a line is very large. The wafer can be curved oneself. It can also be flat, but flexible enough to match the shape of the staves under the effect of the pressure of the water.

Les perforations sont de révolution et leur axe fictif est normal à la surface courbée. Elles sont ainsi faciles à usiner. La courbe en section transversale de cette surface courbée est de préférence un cercle, mais elle peut être constituée aussi par les cordes d'une partie d'un polygone régulier inscrit dans un cercle, les axes des perforations passant par le milieu des cordes. On obtient ainsi que les jets d'eau convergent au centre du cercle et l'on dispose de préférence le voile à consolider par les jets d'eau de manière à ce que le centre du cercle soit au milieu du voile, la distance entre l'élément transportant le voile (T), convoyeur ou tambour, portant le voile et le point de la face inférieure de la plaquette qui en est le plus éloigné étant en général comprise entre 10 mm et 50 mm, de préférence entre 20 mm et 40 mm. Mais, la surface courbée peut avoir aussi une section transversale elliptique ou parabolique. Les perforations de la plaquette peuvent être en quinconce, les points d'impacts des jets sur le voile se succédant alors sur une même ligne d'une façon très rapprochée. Pour avoir une grande quantité d'eau projetée en un même point, et ainsi pouvoir perforer le voile, les perforations sont alignées suivant des lignes perpendiculaires à des rangées longitudinales de perforations. Habituellement, il y a de 2 à 6 rangées dans ce cas. Mais il peut y avoir aussi une seule rangée de perforations.The perforations are of revolution and their fictitious axis is normal to the curved surface. They are thus easy to machine. The cross-sectional curve of this curved surface is preferably a circle, but it may also be constituted by the strings of a portion of a regular polygon inscribed in a circle, the axes of the perforations passing through the middle of the strings. It is thus obtained that the jets of water converge at the center of the circle and the veil to be consolidated by the jets of water is preferably arranged so that the center of the circle is in the middle of the veil, the distance between the member carrying the web (T), conveyor or drum, carrying the web and the point of the lower face of the wafer which is furthest from it being generally between 10 mm and 50 mm, preferably between 20 mm and 40 mm. mm. But, the curved surface may also have an elliptical or parabolic cross section. The perforations of the plate can to be staggered, the points of impact of the jets on the veil then succeeding on the same line in a very close manner. To have a large amount of water sprayed at one point, and thus be able to perforate the web, the perforations are aligned along lines perpendicular to longitudinal rows of perforations. Usually, there are 2 to 6 rows in this case. But there can also be a single row of perforations.

Le diamètre des perforations est compris entre 50 microns et 250 microns et la distance entre deux perforations voisines entre 0,4 mm et 30 mm. De préférence la distance entre chaque rangée de perforations est comprise entre 0,4 mm et 3 mm. La plaquette a en général une épaisseur comprise entre 0,5 mm et 5 mm, de préférence entre 0,6 mm et 1,4 mm.The diameter of the perforations is between 50 microns and 250 microns and the distance between two adjacent perforations between 0.4 mm and 30 mm. Preferably the distance between each row of perforations is between 0.4 mm and 3 mm. The wafer generally has a thickness of between 0.5 mm and 5 mm, preferably between 0.6 mm and 1.4 mm.

Suivant un mode de réalisation, le bord libre longitudinal de l'une des portées est plus éloigné de la chambre que le bord libre longitudinal de l'autre portée. La plaquette est montée en une position où elle coupe le plan d'envoi de l'eau défini par le passage mettant la chambre en communication avec la sortie, mais où elle n'est pas de symétrie par rapport à ce plan. En inclinant ainsi la plaquette, et aussi de préférence le plan axial de la sortie par rapport au plan axial du passage, et en faisant toujours en sorte que les axes fictifs des perforations soient normaux à la surface courbée de la plaquette, on décale le point de convergence des jets en amont ou de préférence en aval sur le voile se déplaçant devant le dispositif de projection de jets d'eau et on fait en sorte que ces jets arrivent sur le voile suivant un angle sensiblement identique. Cette arrivée, suivant un angle qui peut être compris entre 70 et 90 degrés, sur le voile permet de diminuer les rebonds des jets en les orientant au mieux. Cette arrivée se fait d'autant mieux que la largeur de la sortie est comprise entre 1 mm et 10 mm, de préférence entre 2 mm et 5 mm.According to one embodiment, the longitudinal free edge of one of the spans is further from the chamber than the longitudinal free edge of the other span. The wafer is mounted in a position where it intersects the plane of sending the water defined by the passage putting the chamber in communication with the outlet, but where it is not symmetrical with respect to this plane. By thus inclining the wafer, and also preferably the axial plane of the outlet relative to the axial plane of the passage, and always ensuring that the shafts of the perforations are normal to the curved surface of the wafer, the point is shifted converging the jets upstream or preferably downstream on the web moving in front of the jet of water jets and is arranged so that these jets arrive on the web at a substantially identical angle. This arrival, at an angle that can be between 70 and 90 degrees, on the sail reduces the bounces of the jets in them. orienting at best. This arrival is all the better that the width of the outlet is between 1 mm and 10 mm, preferably between 2 mm and 5 mm.

Suivant un mode de réalisation permettant de faire en sorte que le dispositif de projection de jets d'eau puisse être utilisé aussi bien avec des plaquettes suivant l'invention qu'avec des plaquettes habituelles planes, la plaquette est supportée par un porte-plaquette unique, d'un seul tenant, de même courbure que la plaquette et ouvert en regard de la sortie. Pour utiliser la plaquette à surface courbée suivant l'invention, on met le porte-plaquette dans le dispositif de projection de jets d'eau alors qu'il supporte une plaquette suivant l'invention, tandis que, pour mettre une plaquette du type ancien, on retire le porte-plaquette et on met la plaquette en la supportant par un porte-plaquette classique s'accommodant d'une plaquette plane.According to an embodiment making it possible to ensure that the device for jetting water jets can be used both with wafers according to the invention and with conventional flat plates, the wafer is supported by a single wafer holder. , in one piece, the same curvature as the plate and open next to the exit. To use the curved surface plate according to the invention, the wafer holder is placed in the jets of water jet device while it supports a wafer according to the invention, while, to put a wafer of the old type the wafer holder is removed and the wafer is supported by a conventional wafer holder accommodating a flat wafer.

Le dispositif à sortie longitudinale d'envoi d'eau sous pression comprend généralement un corps et un mors fixé au corps de manière à y retenir la plaquette perforée soutenue ou non par un porte-plaquette. La chambre longitudinale, de préférence cylindrique, est usinée dans le corps et est alimentée en eau comprimée par l'une des faces frontales. Le passage longitudinal d'envoi de l'eau sous pression sur la plaquette perforée s'étend sur toute la dimension longitudinale du corps et débouche dans une chambre de répartition définie par le mors et dans laquelle la plaquette est supportée, le mors définissant en dessous de la plaquette l'ouverture de sortie des jets en direction d'un moyen de transport du voile, généralement d'un tapis convoyeur perforé sans fin ou d'un tambour perforé.The longitudinal output device for sending water under pressure generally comprises a body and a jaw fixed to the body so as to retain the perforated plate sustained or not by a wafer holder. The longitudinal chamber, preferably cylindrical, is machined in the body and is supplied with water compressed by one of the end faces. The longitudinal passage for sending water under pressure on the perforated plate extends over the entire longitudinal dimension of the body and opens into a distribution chamber defined by the jaw and in which the plate is supported, the jaw defining below. of the wafer the exit opening of the jets towards a veil conveying means, generally an endless perforated conveyor belt or a perforated drum.

Suivant un mode de réalisation permettant d'incliner les jets alors que la chambre débouche sur la plaquette par un passage, le plan longitudinal médian de la sortie est incliné par rapport au plan longitudinal médian du passage.According to one embodiment for tilting the jets while the chamber opens on the plate by a passage, the median longitudinal plane of the outlet is inclined relative to the median longitudinal plane of the passage.

On décrit aussi une installation de consolidation d'un non-tissé par jets d'eau comprenant un élément de transport (T) du non-tissé devant un dispositif de projection de jets. Le dispositif est tel que défini ci-dessus et la distance la plus petite entre l'élément de transport et le point de la face inférieure de la plaquette le plus éloigné de l'élément de transport est comprise entre 10 mm et 50 mm.Also described is a water jet nonwoven consolidation plant comprising a transport member (T) of the nonwoven in front of a jet jetting device. The device is as defined above and the smallest distance between the transport element and the point of the lower face of the wafer furthest from the transport element is between 10 mm and 50 mm.

L'invention vise une plaquette perforée selon la revendication 1.The invention relates to a perforated plate according to claim 1.

Aux dessins annexés, donnés uniquement à titre d'exemple :

  • La figure 1 est une vue en coupe d'une plaquette suivant l'invention,
  • La figure 2 est une vue en coupe d'un dispositif de projection de jets d'eau comportant la plaquette de la figure 1,
  • La figure 3 est une vue semblable à la figure 2 alors que la plaquette est supportée par un porte-plaquette,
  • La figure 4 est une vue en élévation d'une plaquette suivant l'invention ayant trois rangées de perforation centrée en quinconce,
  • La figure 5 est une vue de côté correspondant à la figure 4,
  • La figure 6 est une vue de dessus correspondant aux figures 4 et 5,
  • La figure 7 est une vue en perspective correspondant aux figures 4 à 6,
  • La figure 8 est une vue schématique en élévation d'une plaquette suivant l'invention à trois rangées centrées et alignées,
  • La figure 9 est une vue de côté correspondant à la figure 8,
  • La figure 10 est une vue en plan correspondant aux figures 8 et 9,
  • La figure 11 est une vue en perspective correspondant aux figures 8 à 10,
  • La figure 12 est une vue schématique en élévation d'une plaquette coudée à trois rangées centrées en quinconce,
  • La figure 13 est une vue de côté correspondant à la figure 12,
  • La figure 14 est une vue de dessus correspondant à la figure 12 et 13,
  • La figure 15 est une vue en perspective correspondant aux figures 12 à 14,
  • La figure 16 est une vue en coupe d'un autre mode de réalisation du dispositif de projection de jets d'eau, et
  • La figure 17 est une vue en coupe d'un autre mode de réalisation du dispositif de projection d'eau.
In the accompanying drawings, given solely by way of example:
  • The figure 1 is a sectional view of a wafer according to the invention,
  • The figure 2 is a sectional view of a water jet projection device comprising the plate of the figure 1 ,
  • The figure 3 is a view similar to the figure 2 while the wafer is supported by a wafer holder,
  • The figure 4 is an elevational view of a wafer according to the invention having three rows of perforations centered in a quincunx,
  • The figure 5 is a side view corresponding to the figure 4 ,
  • The figure 6 is a corresponding top view to the Figures 4 and 5 ,
  • The figure 7 is a perspective view corresponding to Figures 4 to 6 ,
  • The figure 8 is a schematic elevational view of a wafer according to the invention with three rows centered and aligned,
  • The figure 9 is a side view corresponding to the figure 8 ,
  • The figure 10 is a plan view corresponding to Figures 8 and 9 ,
  • The figure 11 is a perspective view corresponding to Figures 8 to 10 ,
  • The figure 12 is a diagrammatic elevational view of a three-row angled wafer centered in a staggered pattern,
  • The figure 13 is a side view corresponding to the figure 12 ,
  • The figure 14 is a top view corresponding to the figure 12 and 13 ,
  • The figure 15 is a perspective view corresponding to Figures 12 to 14 ,
  • The figure 16 is a sectional view of another embodiment of the device for projecting jets of water, and
  • The figure 17 is a sectional view of another embodiment of the water spray device.

La plaquette d'un seul tenant représentée à la figure 1 est sensiblement rectangulaire, mais est précourbée suivant une surface courbée tournant sa concavité vers le bas. La plaquette 1 en inox a deux rangées de perforations dont les axes 2 fictifs sont normaux à l'arc de cercle de la plaquette 1 tournant sa convexité vers le haut. Les axes 2 fictifs illustrent le trajet des jets d'eau qui convergent au point A.The one-piece plate represented in the figure 1 is substantially rectangular, but is precurved along a curved surface turning its concavity downward. The stainless steel plate 1 has two rows of perforations whose fictitious axes 2 are normal to the arc of circle of the plate 1 turning its convexity upwards. The fictitious axes 2 illustrate the path of the jets of water converging at point A.

A la figure 2 le dispositif de projection de jets d'eau comprend un corps 4 constitué d'un corps proprement dit et d'un mors 5 en acier fixé en dessous du corps d'une manière étanche. Dans le corps 4 est défini une chambre 6 cylindrique d'alimentation en eau sous une pression de 400 bars, la source d'alimentation en eau communiquant avec la chambre 6 par une extrémité frontale du corps 4 qui se trouve au-dessus du plan de l'épure. Cette chambre 6 unique communique par un passage 7'longitudinal unique s'étendant sur toute l'étendue longitudinale du corps. mais fermée sur les deux faces frontales. Ce passage débouche dans un espace défini par les deux parties du mors au bas duquel se trouve la plaquette 1 unique suivant la figure 1. Entre les deux parties du mors 5 est défini en dessous de la plaquette une sortie 7 par laquelle les jets 2 d'eau peuvent sortir du dispositif de projection de jets d'eau.To the figure 2 the water spray device comprises a body 4 consisting of a body itself and a jaw 5 steel fixed below the body in a sealed manner. In the body 4 is defined a cylindrical water supply chamber 6 at a pressure of 400 bar, the water supply source communicating with the chamber 6 by a front end of the body 4 which is above the plane of the blueprint. This single chamber 6 communicates through a single longitudinal passage 7 'extending over the entire longitudinal extent of the body. but closed on both front faces. This passage opens into a space defined by the two parts of the jaw at the bottom of which is the single wafer 1 following the figure 1 . Between the two parts of the jaw 5 is defined below the wafer an outlet 7 through which the jets 2 of water can out of the water jet device.

De part et d'autre de la sortie 7, le mors définit deux portées 3 courbées suivant une surface courbée qui tourne sa concavité vers la sortie 7. Les deux portées 3 sont définies par une même génératrice longitudinale. Elles font face à la chambre 6 et sont de part et d'autre du passage 7'.On either side of the outlet 7, the jaw defines two bearing surfaces 3 curved along a curved surface which turns its concavity towards the outlet 7. The two bearing surfaces 3 are defined by the same longitudinal generatrix. They face the room 6 and are on both sides of the passage 7 '.

Le dispositif de projection de jets d'eau représenté à la figure 3 diffère de celui représenté à la figure 2 par le fait que la plaquette 1 est plane, mais est suffisamment souple pour se courber sous l'effet de la pression de l'eau, de sorte qu'elle épouse la forme courbée d'un porte-plaquette 8 unique, d'un seul tenant, qui, tout comme la plaquette 1, s'étend sur toute la dimension longitudinale du dispositif de projection de jets d'eau. La face supérieure de ce porte-plaquette 8 a une surface courbée que la plaquette 1 épouse.The water jet projection device shown in FIG. figure 3 differs from that shown in figure 2 in that the wafer 1 is flat, but is sufficiently flexible to bend under the effect of the pressure of water, so that it matches the curved shape of a single wafer holder 8, a only holding, which, just like the plate 1, extends over the entire longitudinal dimension of the device for jetting water jets. The upper face of this wafer holder 8 has a curved surface that the wafer 1 wife.

Aux figures 4 à 7, trois rangées de perforations sont pratiquées en quinconce dans la plaquette courbée. Chaque perforation de la rangée du milieu est disposée entre deux perforations de la rangée de gauche. Chaque perforation de la rangée de droite est disposée entre deux perforations de la rangée centrale, mais aussi entre deux perforations de la rangée de gauche. Bien que la distance entre deux perforations suivant une rangée obéissent à la règle habituelle régissant cet intervalle, la distance entre les points d'impact des jets sur le non tissé est divisée par trois et cela sans pour autant à avoir à usiner des perforations faisant un angle avec la normale à la surface courbée de la plaquette.To the Figures 4 to 7 , three rows of perforations are made staggered in the curved plate. Each perforation of the middle row is disposed between two perforations of the left row. Each perforation of the right row is arranged between two perforations of the central row, but also between two perforations of the left row. Although the distance between two perforations in a row obey the usual rule governing this interval, the distance between the points of impact of the jets on the nonwoven is divided by three and that without having to machine perforations making a angle with the normal to the curved surface of the wafer.

Dans le mode de réalisation des figures 8 à 11, les perforations sont disposées en trois rangées, les perforations sont alignées en n'étant donc pas en quinconce et la rangée du milieu donne un jet arrivant perpendiculairement sur le voile 10. Les trois jets issus d'une même ligne de perforations, perpendiculaire aux rangées, convergent en un même point.In the embodiment of Figures 8 to 11 , the perforations are arranged in three rows, the perforations are aligned so not in staggered rows and the middle row gives a jet arriving perpendicularly on the web 10. The three jets from the same line of perforations, perpendicular to the rows, converge at the same point.

Dans le mode de réalisation représenté aux figures 12 à 15, la plaquette est constituée par trois cordes 11, 12, 13 d'arcs d'un cercle 14 imaginaire de centre 15 se trouvant sur le non tissé. Les perforations sont perpendiculaires aux cordes et leur axe fictif est perpendiculaire à la corde 11, 12, 13. Les perforations sont disposées en quinconce.In the embodiment shown in Figures 12 to 15 , the wafer is constituted by three ropes 11, 12, 13 of arcs of an imaginary circle 14 of center 15 located on the nonwoven. The perforations are perpendicular to the strings and their imaginary axis is perpendicular to the string 11, 12, 13. The perforations are arranged in staggered rows.

A la figure 16 la plaquette 16 est inclinée par rapport au plan X longitudinal médian de la chambre 6 défini par le passage 7' et le plan Y longitudinal médian de la sortie 7 est inclinée par rapport au plan X longitudinal médian du passage 7'. Les jets qui sortent de la plaquette 16 arrivent sur le voile 10 de non tissé, supporté par un tambour tournant (T) dans le sens des aiguilles d'une montre, comme indiqué par la flèche (F), en aval par rapport à l'endroit où ils arriveraient si la plaquette 16 n'était pas inclinée. Les deux parties du mors eux-mêmes ont chacun une portée inclinée épousant la plaquette et délimitent une ouverture sous la plaquette pour la sortie 7 des jets.To the figure 16 the wafer 16 is inclined relative to the median longitudinal X plane of the chamber 6 defined by the passage 7 'and the median longitudinal Y plane of the outlet 7 is inclined relative to the median longitudinal X plane of the passage 7'. The jets coming out of the wafer 16 arrive on the nonwoven web 10, supported by a rotating drum (T) in the direction of the clockwise, as indicated by the arrow (F), downstream from where they would arrive if the plate 16 was not inclined. The two parts of the jaw themselves each have an inclined bearing the wafer and define an opening under the wafer for the outlet 7 of the jets.

Le mode de la réalisation de la figure 17 correspond à celui de la figure 16, mais cette fois-ci la plaquette 16 est supportée par un porte-plaquette 17 ayant lui-même une surface courbée ou portée épousant celle de la plaquette, tandis que sa surface 18 par laquelle il s'appuie sur le mors est une surface plane en sorte qu'en remplaçant le porte-plaquette 17 par un porte-plaquette habituel, on peut aussi faire fonctionner le dispositif de projection de jets avec une plaquette plane classique.The mode of realization of the figure 17 corresponds to that of the figure 16 , but this time the wafer 16 is supported by a wafer holder 17 itself having a curved surface or bearing that of the wafer, while its surface 18 by which it is supported on the jaw is a flat surface so that by replacing the wafer holder 17 with a conventional wafer holder, the jet projecting device can also be operated with a conventional planar wafer.

Claims (1)

  1. Perforated plate
    - whose ratio of length to width is between 20 and 200 ;
    - with a curved portion in accordance with a curved surface having a longitudinal generating line and
    - with perforations generated by means of revolution, whose notional axis is normal with respect to the curved surface and whose diameter is between 50 and 250 micrometres ;
    characterised in that
    - the cross-sectional curve of the curved surface is a circle or is constituted by the chords of a portion of a regular polygon inscribed within a circle in order to form jets which converge at the centre of the circle and
    - the distance between two adjacent perforations is between 0.4 and 10 mm.
EP13005660.9A 2009-01-16 2009-08-28 Curved perforated plate Active EP2712679B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0900192A FR2941158B1 (en) 2009-01-16 2009-01-16 DEVICE FOR PROJECTING WATER JETS BY A CURVED PERFORATED PLATE
EP09737039.9A EP2387470B1 (en) 2009-01-16 2009-08-28 Device for spraying jets of water by means of a curved perforated plate

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP09737039.9A Division-Into EP2387470B1 (en) 2009-01-16 2009-08-28 Device for spraying jets of water by means of a curved perforated plate
EP09737039.9A Division EP2387470B1 (en) 2009-01-16 2009-08-28 Device for spraying jets of water by means of a curved perforated plate

Publications (2)

Publication Number Publication Date
EP2712679A1 EP2712679A1 (en) 2014-04-02
EP2712679B1 true EP2712679B1 (en) 2016-04-06

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Application Number Title Priority Date Filing Date
EP13005660.9A Active EP2712679B1 (en) 2009-01-16 2009-08-28 Curved perforated plate
EP09737039.9A Active EP2387470B1 (en) 2009-01-16 2009-08-28 Device for spraying jets of water by means of a curved perforated plate

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP09737039.9A Active EP2387470B1 (en) 2009-01-16 2009-08-28 Device for spraying jets of water by means of a curved perforated plate

Country Status (5)

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EP (2) EP2712679B1 (en)
CN (1) CN102271820B (en)
ES (1) ES2562347T3 (en)
FR (1) FR2941158B1 (en)
WO (1) WO2010081939A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103498289B (en) * 2013-09-29 2015-11-18 无锡纳润特科技有限公司 The type high pressure jet head of water thorn fixed network machine
DE202014101647U1 (en) * 2014-04-08 2015-07-09 Autefa Solutions Germany Gmbh nozzle beam
CN104233627A (en) * 2014-09-22 2014-12-24 杭州诺邦无纺股份有限公司 Special microneedle high-pressure spunlacing plate for mimic enzyme biological protection spunlaced material

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JPH10246946A (en) * 1997-03-04 1998-09-14 Fuji Photo Film Co Ltd Image forming device
JPH1176871A (en) * 1997-09-05 1999-03-23 Yamaho Kogyo Kk Spray nozzle and orifice plate used therefor and production thereof
WO2009090084A1 (en) * 2008-01-16 2009-07-23 Boehringer Ingelheim Pharma Gmbh & Co. Kg Nozzle and inhaler and method for producing a nozzle

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US2709112A (en) * 1952-12-08 1955-05-24 Curtice Mfg Co Inc Lawn sprinkling nozzles
US3403862A (en) * 1967-01-06 1968-10-01 Du Pont Apparatus for preparing tanglelaced non-woven fabrics by liquid stream jets
FR2802553B1 (en) * 1999-12-17 2002-01-04 Icbt Perfojet Sa DEVICE FOR TREATING SHEET MATERIALS USING PRESSURE WATER JETS
US6053976A (en) * 1997-05-08 2000-04-25 Fuji Photo Film Co., Ltd. Fluid injecting apparatus and method of manufacturing fluid injection apparatus
US6253429B1 (en) * 1999-10-12 2001-07-03 Textile Enhancements International, Inc. Multi-vane method for hydroenhancing fabrics
WO2003007038A1 (en) 2001-07-03 2003-01-23 Brown University Research Foundation Method and apparatus for processing optical signals with supergratings
FR2836074B1 (en) * 2002-02-19 2004-12-24 Rieter Perfojet WATER JET PROJECTION DEVICE WITH REMOVABLE JOINT HOLDER
JP4439854B2 (en) * 2002-10-08 2010-03-24 三菱レイヨン・エンジニアリング株式会社 Non-woven fabric manufacturing method using pressurized steam jet nozzle

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Publication number Priority date Publication date Assignee Title
JPH10246946A (en) * 1997-03-04 1998-09-14 Fuji Photo Film Co Ltd Image forming device
JPH1176871A (en) * 1997-09-05 1999-03-23 Yamaho Kogyo Kk Spray nozzle and orifice plate used therefor and production thereof
WO2009090084A1 (en) * 2008-01-16 2009-07-23 Boehringer Ingelheim Pharma Gmbh & Co. Kg Nozzle and inhaler and method for producing a nozzle

Also Published As

Publication number Publication date
WO2010081939A1 (en) 2010-07-22
EP2387470B1 (en) 2015-12-23
FR2941158B1 (en) 2014-07-18
EP2387470A1 (en) 2011-11-23
FR2941158A1 (en) 2010-07-23
CN102271820B (en) 2015-06-24
ES2562347T3 (en) 2016-03-03
EP2712679A1 (en) 2014-04-02
CN102271820A (en) 2011-12-07

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