EP0400249A1 - Apparatus for perforating a web - Google Patents

Apparatus for perforating a web Download PDF

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Publication number
EP0400249A1
EP0400249A1 EP19890420086 EP89420086A EP0400249A1 EP 0400249 A1 EP0400249 A1 EP 0400249A1 EP 19890420086 EP19890420086 EP 19890420086 EP 89420086 A EP89420086 A EP 89420086A EP 0400249 A1 EP0400249 A1 EP 0400249A1
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EP
European Patent Office
Prior art keywords
sheet
injector
water
cylinder
plate
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP19890420086
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German (de)
French (fr)
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EP0400249B1 (en
Inventor
André Vuillaume
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Perfojet SA
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Perfojet SA
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Publication date
Application filed by Perfojet SA filed Critical Perfojet SA
Priority to DE1989615748 priority Critical patent/DE68915748T2/en
Publication of EP0400249A1 publication Critical patent/EP0400249A1/en
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Publication of EP0400249B1 publication Critical patent/EP0400249B1/en
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H18/00—Needling machines
    • D04H18/04—Needling machines with water jets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/26—Perforating by non-mechanical means, e.g. by fluid jet

Definitions

  • the present invention relates to a universal method for manufacturing a sheet which is completely or incompletely perforated, that is to say in particular a sheet pierced with multiple perforations, or else a sheet having, at the end of the operation, a design with intaglio or relief patterns.
  • this new process can be used on a sheet of any material, which can be, in particular, a paper, a cardboard, a nonwoven fabric, a film, or a plastic plate, or even a sheet of wood or plywood.
  • the invention also relates to new industrial products obtained according to this method, and having original characteristics which it is not possible to obtain with known traditional methods.
  • the object of the present invention is to avoid these drawbacks by providing a practically universal machine for the production of papers, non-woven fabrics, textiles or plastic films which are perforated or have intaglio or raised patterns.
  • a device comprises a support fabric for the sheet material to be treated to be treated which advances with the material under a rotating perforated cylinder, inside which is arranged a fixed water injector oriented transversely to project pressurized water through the perforations of the cylinder in the direction of the sheet to be treated, and it is characterized in that the hydraulic injector comprises, on the one hand a high pressure water inlet chamber which discharges the water against a perforated plate whose holes define needles of water then directed opposite cylinder holes, on the other hand, under the sheet to be treated, a suction box for the water having passed through said sheet.
  • the needles are arranged opposite the holes of the cylinder, offset along one or more generatrices thereof, so as to be the most spaced from each other, on the one hand, to avoid , as much as possible, parasitic phenomena due to the reflection of water on the solid parts of the cylinder, on the other hand, to limit the water flow.
  • the diameter of the holes in the perforated plate is between 50 and 500 microns.
  • a perforated plate pierced with holes arranged according to several distinct generatrices the holes in the plate being always located opposite those of the cylinder, so that the water emitted by the injector completely covers the width of the holes in the cylinder.
  • the injector comprises a device for holding the perforated plate, making it easy to remove it from the body of the injector: the perforated plate is applied strongly against the main body of the injector thanks to the action of hydraulic cylinders which pull the plate upwards via a set of lifting beams and tie rods arranged along the injector.
  • a seal located between the perforated plate and the main injector body makes it possible to seal the assembly. It suffices to release the oil pressure in the hydraulic cylinders, to release the clamping jaws of the perforated plate which it is then possible to extract very easily, by pulling it in the longitudinal direction of the injector, c ' that is to say transversely to the direction of advancement of the sheet material.
  • the water pressure in the main body of the injector is between 2 and 500 bars depending on whether the material to be treated is more or less thick and must be perforated, or simply marked with a water jet.
  • the perforated cylinder can be in contact with the sheet to be treated or be detached from it so that its speed of rotation can be independent of the speed of movement of the sheet, the rotation being able to possibly take place in the opposite direction to that of the sheet scrolling.
  • the perforated cylinder can be of any type, stainless steel, bronze, or even nickel. This list is not exhaustive: it can also be of the same type, for example, as the well-known screen printing cylinders used in textile printing or the deposits of plastic material in relief on floor coverings: the only limit is its mechanical resistance nique to the action of the needles of water emitted by the hydraulic injector.
  • FIG. 1 shows a sheet 1, for example of a nonwoven fabric, which advances in the longitudinal direction represented by the arrow 2.
  • the fixed elongated body 3 of an injector in which a water chamber 4 is defined.
  • the lower bottom thereof is constituted by a plate 5, on which micro-perforations 6 are made, which will each define a water needle 7.
  • Two longitudinal jaws 8 and 9 are subjected to the action of hydraulic cylinders such as 10, to clamp and tighten the longitudinal edges (perpendicular to the arrow 2), of the plate 5 against the body 3 of the injector. the sealing of the mounting of the plate 5 against the injector body 3, when the assembly is in service.
  • This water chamber 4 is, for example, surmounted by a water supply chamber 12, with which it comlunique by large holes 13.
  • the hydraulic injector 3 - 5 - 8 - 9 is mounted in a fixed position inside a rotary cylinder 14, on the thin wall 15 of which are distributed orifices 16.
  • the wall 15 of the cylinder 14 can be at a certain distance 17 above the upper face of the sheet 1.
  • the tangential speed of the rotary cylinder 14 (arrow 18) is independent of the speed of advance of the sheet 1 (arrow 2).
  • An 18 g / m2 non-woven sheet obtained by the so-called "wet process” is supported by a bronze fabric of knitting type, comprising 32 threads in the warp direction, and 27 threads in the weft direction. This sheet is subjected to the action of the device shown in Figures 2 and 3.
  • the perforated cylinder 14 has holes 16 of rectangular section 0.8 mm in the axial direction (arrow 19) and 1.3 mm in the tangential direction (arrow 20), the distance between these holes being 0.8 mm in both directions.
  • the thickness of the cylinder is 0.4 mm and the section of the holes is identical inside and outside the cylinder.
  • the hydraulic injector comprises a perforated plate 0.3 mm thick comprising three rows of holes 0.28 mm in diameter spaced 1.6 mm (from axis to axis) along a generator, and 1 mm between the generators (see Figure 3).
  • the water pressure in the injector is 3.5 bars (chambers 4 and 12).
  • the cylinder is held at 0.5 mm above the sheet 1 and its tangential speed of rotation (arrow 18) is equal to the speed of advancement of the sheet 1 (arrow 2).
  • a plastic sheet 30 microns thick is subjected to the action of the above device.
  • Sheet 1 is placed on a stainless steel support fabric of the "plain" type, comprising 7 threads per cm, in the warp and weft directions.
  • the perforated plate 5 of the injector has a single row of holes 6, 0.12 mm in diameter, spaced from each other by 1.6 mm.
  • the perforated plate 5 is positioned so that the water needles 7 are located approximately in the middle of the orifices 16 of the perforated cylinder 14.
  • the water pressure in the injector is 150 bars and the treatment speed 25 meters / min.
  • the cylinder is located 1 mm above the fabric (interval 17), and its tangential speed of rotation (arrow 18) is equal to the speed of advance of the sheet 1 and its fabric (arrow 2).
  • the plastic sheet 1 is perforated in the form of thin rectangular slots, 0.8 mm in length and non-measurable width.
  • the resistance in the transverse direction of the sheet 1 is considerably reduced, and its porosity is greatly increased.
  • the sheet 1 subjected to a jet of water is no longer waterproof.
  • the same sheet 1 is subjected to a similar treatment.
  • the only difference with the previous treatment is the speed of rotation of the cylinder 14 which gives a vi tangential tesse (arrow 18) of 120 meters per minute (about five times the speed of advancement of sheet 1 (arrow 2).
  • the plastic sheet 1 is now punctured by a multitude of small holes whose dimensions are not measurable.
  • the air permeability of the sheet is excellent, and its transverse resistance is little affected.
  • the sheet subjected to a jet of water also remains waterproof. Finally, the plastic film has lost its characteristic "sound".

Abstract

The invention relates to a fixed injector (3) - (8) - (9) conveying water under pressure for the purpose of working a web (1) of nonwoven or the like. The microperforated plate (5) makes it possible for the injector (3) - (8) - (9) to convey needles of water (7) onto the web (1). A perforated cylinder (14) which does not touch the web (gap 17) can be interposed. The invention is used for the microperforation of dots or slits in various materials, including plastic, in the form of flexible webs. <IMAGE>

Description

La présente invention concerne un pro­cédé universel , pour fabriquer une feuille qui soit complè­tement ou incomplètement perforée , c'est-à-dire notamment une feuille percée de perforations multiples , ou bien une feuille présentant , en fin d'opération , un dessin avec des motifs en creux ou en relief .The present invention relates to a universal method for manufacturing a sheet which is completely or incompletely perforated, that is to say in particular a sheet pierced with multiple perforations, or else a sheet having, at the end of the operation, a design with intaglio or relief patterns.

Il est bien entendu que ce procédé nou­veau peut être utilisé sur une feuille d'un matériau quel­conque , qui peut être , en particulier , un papier , un carton ,un tissu non tissé , un film , ou une plaque de matière plastique , voire une feuille de bois ou de contre-­plaqué.It is understood that this new process can be used on a sheet of any material, which can be, in particular, a paper, a cardboard, a nonwoven fabric, a film, or a plastic plate, or even a sheet of wood or plywood.

L'invention concerne également les produits industriels nouveaux obtenus suivant cette métho­de , et possédant des caractéristiques originales qu'il n'­est pas possible d'obtenir avec les méthodes traditionnel­les connues.The invention also relates to new industrial products obtained according to this method, and having original characteristics which it is not possible to obtain with known traditional methods.

Il est connu de fabriquer des étoffes non-tissées ,présentant des perforations ou possédant des zones de fibres de densité réduite , notamment pour des ap­plications dans des domaines médicaux ou hospitaliers , de l'essuyage , de la filtration , d'enveloppes pour sachets de thé etc.. . Pour cela , il est connu , par exemple dans le brevet français 2 068 676 , de faire circuler une nappe de fibres sur la toile poreuse d'un support transporteur , la nappe à traiter passant sous un cylindre rotatif perfo­ré à l'intérieur duquel est disposé un injecteur hydrauli­que , qui se présente sous la forme d'une barre transver­sale fixe . Cet injecteur projette sous pression un rideau d'eau continu ,dont une partie traverse les trous du cylin­dre perforé , créant ainsi des jets d'eau dont la dimen­sion correspond à celle des perforations du cylindre . Ces jets d'eau traversent la nappe de fibres en reproduisant sur celle -ci la forme des trous du cylindre avant d' être recueillie par une caisse aspirante située sous la toile du transporteur , au-dessous du cylindre rotatif.It is known to manufacture nonwoven fabrics, having perforations or having areas of fibers of reduced density, in particular for applications in medical or hospital fields, wiping, filtration, envelopes for sachets of tea etc ... For this, it is known, for example in French patent 2,068,676, to circulate a sheet of fibers on the porous fabric of a carrier support, the sheet to be treated passing under a rotary perforated cylinder inside which is arranged a hydraulic injector, which is in the form of a fixed crossbar. This injector projects under pressure a continuous curtain of water, part of which passes through the holes of the perforated cylinder, thus creating water jets whose size corresponds to that of the perforations in the cylinder. These water jets pass through the sheet of fibers, reproducing on the latter the shape of the holes in the cylinder before being collected by a suction box located under the fabric of the conveyor, below the rotary cylinder.

Un tel dispositif connu présente de grands désavantages . En effet , l'utilisation d'un injec­teur fournissant une lame d'eau continue sur toute la géné­ ratrice du cylindre se traduit par la délivrance d'un dé­bit d'eau considérable à l'intérieur de celui-ci .Compte tenu du fait que les parties perforées du cylindre ne re­présentent qu'une faible partie de la surface de celui-ci , il en résulte que l'on est rapidement confronté à un pro­blème pratiquement insoluble , qui est celui de l'élimina­tion , à l'intérieur du cylindre , de l'eau réfléchie par les parties pleines.Such a known device has great disadvantages. Indeed, the use of an injector providing a continuous blade of water over the whole gen Ratrice of the cylinder results in the delivery of a considerable flow of water inside it. Given the fact that the perforated parts of the cylinder represent only a small part of the surface thereof, as a result, one is rapidly confronted with a practically insoluble problem, which is that of the elimination, inside the cylinder, of the water reflected by the solid parts.

Afin de limiter le problème , on est conduit à diminuer la quantité d'eau émise par l'injec­teur , c'est-à-dire à réduire l'épaisseur du rideau d'eau, ainsi que la pression de l'eau , ce qui a pour conséquen­ce l'obtention , à l'extérieur du cylindre ,de jets d'eau qui ne possèdent pas une énergie cinétique suffisante : pour perforer des matériaux du type film plastique , tissus, voire papier épais.In order to limit the problem, it is necessary to reduce the amount of water emitted by the injector, that is to say to reduce the thickness of the water curtain, as well as the water pressure, this which results in the obtaining, outside of the cylinder, of water jets which do not have sufficient kinetic energy: to perforate materials of the plastic film, tissue, or even thick paper type.

L'eau qui rebondit sur les parties pleines du cylindre le long de la même génératrice pertur­be également la cohésion du rideau d'eau et affecte consi­dérablement l'énergie cinétique des jets d'eau émis par le cylindre . En effet , l'eau a tendance à retomber de fa­çon aléatoire dans le cylindre après rebondissement . Cela se traduit par une accumulation anarchique d'eau le long de la génératrice du cylindre située au droit du rideau d' eau .The water which rebounds on the solid parts of the cylinder along the same generator also disturbs the cohesion of the curtain of water and considerably affects the kinetic energy of the water jets emitted by the cylinder. Indeed, water tends to fall randomly into the cylinder after rebounding. This results in an uncontrolled accumulation of water along the generator of the cylinder located to the right of the water curtain.

Cette eau en excès joue le rôle d' amortisseur envers l'eau émise par l'injecteur qui voit ain­si son énergie cinétique réduite à un niveau tel qu'elle de­vient insuffisante pour assurer un marquage uniforme de la feuille à cet endroit . . Il en résulte , sur la feuille à traiter , l'apparition de zones présentant un aspect délavé dont le dessin ou la perforation sont mal définis.This excess water acts as a shock absorber against the water emitted by the injector which thus sees its kinetic energy reduced to a level such that it becomes insufficient to ensure uniform marking of the sheet at this location. . As a result, on the sheet to be treated, the appearance of areas having a washed out appearance whose design or perforation are poorly defined.

La présente invention a pour but d'éviter ces inconvénients ,en réalisant une machine prati­quement universelle pour la fabrication de papiers , d' étoffes non-tissées , de textiles ou de films plastiques perforés ou possédant des motifs en creux ou en relief.The object of the present invention is to avoid these drawbacks by providing a practically universal machine for the production of papers, non-woven fabrics, textiles or plastic films which are perforated or have intaglio or raised patterns.

Un dispositif suivant l'invention comprend une toile de support pour le matériau en feuille à traiter à traiter qui avance avec le matériau sous un cylindre per­foré tournant , à l'intérieur duquel est disposé un injec­teur d'eau fixe orienté transversalement pour projeter de l'eau sous pression à travers les perforations du cylindre en direction de la feuille à traiter , et il est caractéri­sé en ce que l'injecteur hydraulique comporte , d'une part une chambre d'arrivée d'eau à haute pression qui refoule l'eau contre une plaque perforée dont les trous définissent des aiguilles d'eau ensuite dirigées en face des trous du cylindre , d'autre part , sous la feuille à traiter , une caisse d'aspiration pour l'eau ayant traversé ladite feuil­le .A device according to the invention comprises a support fabric for the sheet material to be treated to be treated which advances with the material under a rotating perforated cylinder, inside which is arranged a fixed water injector oriented transversely to project pressurized water through the perforations of the cylinder in the direction of the sheet to be treated, and it is characterized in that the hydraulic injector comprises, on the one hand a high pressure water inlet chamber which discharges the water against a perforated plate whose holes define needles of water then directed opposite cylinder holes, on the other hand, under the sheet to be treated, a suction box for the water having passed through said sheet.

Suivant une autre caractéristi­que de l'invention , les aiguilles sont disposées en face des trous du cylindre , décalées suivant une ou plusieurs génératrices de celui-ci , de façon à être le plus espacées les unes des autres , d'une part , pour éviter , autant que possible , les phénomènes parasites dus à la reflexion de l'eau sur les parties pleines du cylindre , d'autre part , pour limiter le débit d'eau.According to another characteristic of the invention, the needles are arranged opposite the holes of the cylinder, offset along one or more generatrices thereof, so as to be the most spaced from each other, on the one hand, to avoid , as much as possible, parasitic phenomena due to the reflection of water on the solid parts of the cylinder, on the other hand, to limit the water flow.

Suivant une autre caractéristi­que de l'invention , le diamètre des trous de la plaque per­forée est compris entre 50 et 500 microns . Dans le cas des produits devant présenter une perforation de taille su­périeure à la dimension nominale des aiguilles d'eau , il est fait appel à une plaque perforée percée de trous dispo­sés suivant plusieurs génératrices distinctes , les trous de la plaque étant toujours situés en face de ceux du cy­lindre , de façon que l'eau émise par l'injecteur couvre intégralement la largeur des trous du cylindre.According to another characteristic of the invention, the diameter of the holes in the perforated plate is between 50 and 500 microns. In the case of products which must have a perforation larger than the nominal size of the water needles, use is made of a perforated plate pierced with holes arranged according to several distinct generatrices, the holes in the plate being always located opposite those of the cylinder, so that the water emitted by the injector completely covers the width of the holes in the cylinder.

Suivant une autre caractéristi­que de l'invention , l'injecteur comporte un dispositif de maintien de la plaque perforée , permettant de retirer fa­cilement celle-ci du corps de l'injecteur : la plaque per­forée est appliquée fortement contre le corps principal de l'injecteur grâce à l'action de vérins hydrauliques qui tirent la plaque vers le haut par l'intermédiaire d'un en­semble de palonniers et de tirants disposés le long de l'injecteur. Un joint , situé entre la plaque perforée et le corps principal d'injecteur permet d'assurer l'étanchéi­té de l'ensemble . IL suffit de relâcher la pression d'hui­le dans les vérins hydrauliques , pour libérer les mors de serrage de la plaque perforée qu'il est alors possible d'ex­traire très aisément , en la tirant suivant la direction longitudinale de l'injecteur , c'est-à-dire transversalement par rapport à la direction d'avancement du matériau en feuille.According to another characteristic of the invention, the injector comprises a device for holding the perforated plate, making it easy to remove it from the body of the injector: the perforated plate is applied strongly against the main body of the injector thanks to the action of hydraulic cylinders which pull the plate upwards via a set of lifting beams and tie rods arranged along the injector. A seal, located between the perforated plate and the main injector body makes it possible to seal the assembly. It suffices to release the oil pressure in the hydraulic cylinders, to release the clamping jaws of the perforated plate which it is then possible to extract very easily, by pulling it in the longitudinal direction of the injector, c ' that is to say transversely to the direction of advancement of the sheet material.

Suivant une autre caractéristique de l'invention , la pression d'eau dans le corps principal de l'injecteur est comprise entre 2 et 500 bars suivant que le matériau à traiter est plus ou moins épais et doit être per­foré , ou simplement marqué avec un jet d'eau.According to another characteristic of the invention, the water pressure in the main body of the injector is between 2 and 500 bars depending on whether the material to be treated is more or less thick and must be perforated, or simply marked with a water jet.

Suivant une autre caractéristique de l'invention , le cylindre perforé peut être en contact avec la feuille à traiter ou être décollé de celle-ci de façon que sa vitesse de rotation puisse être indépendante de la vitesse de déplacement de la feuille , la rotation pouvant éventuellement s'effectuer dans le sens opposé à celui du défilement de la feuille . Le fait de pouvoir modifier la vitesse de rotation du cylindre par rapport à la feuille a pour résultat qu'un nombre variable de trous du cylindre passe au droit des aiguilles d'eau émises par l'injecteur hydraulique , ce qui se traduit par l'obtention d'un véri­table obturateur hydraulique à vitesse variable et la pos­sibilité d'obtenir , à partir d'un cylindre comportant un nombre de trous déterminé au cm² , une feuille possédant un nmbre de trous totalement différent au cm² , et en particu­lier , des micro-trous , ce qu'il est absolument impossible d'atteindre avec les méthodes conventionnelles , quand les vitesses du cylindre et de la nappe à traiter sont iden­tiques.According to another characteristic of the invention, the perforated cylinder can be in contact with the sheet to be treated or be detached from it so that its speed of rotation can be independent of the speed of movement of the sheet, the rotation being able to possibly take place in the opposite direction to that of the sheet scrolling. The fact of being able to modify the speed of rotation of the cylinder with respect to the sheet results in a variable number of holes in the cylinder passing in line with the needles of water emitted by the hydraulic injector, which results in the obtaining a true hydraulic shutter with variable speed and the possibility of obtaining, from a cylinder comprising a number of holes determined per cm², a sheet having a number of holes completely different from cm², and in particular, micro -holes, which it is absolutely impossible to achieve with conventional methods, when the speeds of the cylinder and of the ply to be treated are identical.

Le cylindre perforé peut être de type quelconque ,en acier inoxydable , en bronze , ou encore en nickel . Cette énumération n'est pas limitative : il peut être aussi du même type , par exemple , que les cylindres sérigraphiques bien connus utilisés dans l'impression tex­tile ou les dépôts de matière plastique en relief sur des revêtements de sol : la seule limite est sa résistance méca­nique nique à l'action des aiguilles d'eau émises par l'injec­teur hydraulique.The perforated cylinder can be of any type, stainless steel, bronze, or even nickel. This list is not exhaustive: it can also be of the same type, for example, as the well-known screen printing cylinders used in textile printing or the deposits of plastic material in relief on floor coverings: the only limit is its mechanical resistance nique to the action of the needles of water emitted by the hydraulic injector.

Le dessin annexé , donné à titre d' exemple non limitatif , permettra de mieux comprendre les caractéristiques de l'invention , et les avantages qu'elle est susceptible de procurer.

  • Figure 1 est une vue d'un injecteur selon l'invention , comportant une plaque perforée avec des trous disposés suivant trois génératrices du cylindre.
  • Figure 2 représente un injecteur se­lon l'invention , disposé à l'intérieur d'un cylindre creux perforé avec des trous rectangulaires disposés en hélicoï­de , de façon que les aiguilles émises par l'injecteur soient situées alternativement devant une partie pleine et une partie perforée du cylindre.
  • Figure 3 représente une plaque per­forée avec trois rangées de trous décalés les uns par rap­port aux autres , de façon à recouvrir intégralement les parties perforées du cylindre.
The appended drawing, given by way of nonlimiting example, will make it possible to better understand the characteristics of the invention, and the advantages which it is likely to provide.
  • Figure 1 is a view of an injector according to the invention, comprising a perforated plate with holes arranged along three generatrices of the cylinder.
  • 2 shows an injector according to the invention, arranged inside a hollow perforated cylinder with rectangular holes arranged in a helical fashion, so that the needles emitted by the injector are located alternately in front of a solid part and a perforated part of the cylinder.
  • Figure 3 shows a perforated plate with three rows of holes offset from each other, so as to completely cover the perforated parts of the cylinder.

On a représenté sur la figure 1 , une feuille 1 , par exemple en un tissu non-tissé , qui avance dans le sens longitudinal représenté par la flèche 2 . Transversalement , et au-dessus de la feuille 1 , se trouve le corps allongé fixe 3 d'un injecteur dans lequel est définie une chambre à eau 4 . Le fond inférieur de cel­le-ci est constitué par une plaque 5 , sur laquelle sont pratiquées de micro-perforations 6 , qui définiront , chacu­ne , une aiguille d'eau 7 . Deux mors longitudinaux 8 et 9 sont soumis à l'action de vérins hydrauliques tels que 10 , pour pincer et serrer les bords longitudinaux ( perpendicu­laires à la flèche 2) , de la plaque 5 contre le corps 3 de l'injecteur .Ce serrage assure l'étanchéité du montage de la plaque 5 contre le corps d'injecteur 3 , quand l'ensem­ble est en service . Par contre , pour le nettoyage et l'en­tretien , il suffit de relâcher les vérins 10 , pour extrai­re commodément la plaque 5 , en la tirant transversalement, comme indiqué par la flèche double 11 . Cette chambre à eau 4 est , par exemple , surmontée par une chambre d'ali­mentation en eau 12 , avec laquelle elle comlunique par de larges orifices 13.FIG. 1 shows a sheet 1, for example of a nonwoven fabric, which advances in the longitudinal direction represented by the arrow 2. Transversally, and above the sheet 1, is the fixed elongated body 3 of an injector in which a water chamber 4 is defined. The lower bottom thereof is constituted by a plate 5, on which micro-perforations 6 are made, which will each define a water needle 7. Two longitudinal jaws 8 and 9 are subjected to the action of hydraulic cylinders such as 10, to clamp and tighten the longitudinal edges (perpendicular to the arrow 2), of the plate 5 against the body 3 of the injector. the sealing of the mounting of the plate 5 against the injector body 3, when the assembly is in service. On the other hand, for cleaning and maintenance, it suffices to release the jacks 10, to conveniently extract the plate 5, by pulling it transversely, as indicated by the double arrow 11. This water chamber 4 is, for example, surmounted by a water supply chamber 12, with which it comlunique by large holes 13.

Dans l'exemple de la figure 2 , l' injecteur hydraulique 3 - 5 - 8 - 9 est monté à poste fi­xe à l'intérieur d'un cylindre rotatif 14 , sur la paroi mince 15 duquel sont répartis des orifices 16 .In the example of FIG. 2, the hydraulic injector 3 - 5 - 8 - 9 is mounted in a fixed position inside a rotary cylinder 14, on the thin wall 15 of which are distributed orifices 16.

Suivant une caractéristique impor­tante de l'invention , la paroi 15 du cylindre 14 peut être à une certaine distance 17 au-dessus de la face supé­rieure de la feuille 1 . Ainsi , la vitesse tangentielle du cylindre rotatif 14 (flèche 18) est-elle indépendante de la vitesse d'avancement de la feuille 1 ( flèche 2).According to an important characteristic of the invention, the wall 15 of the cylinder 14 can be at a certain distance 17 above the upper face of the sheet 1. Thus, the tangential speed of the rotary cylinder 14 (arrow 18) is independent of the speed of advance of the sheet 1 (arrow 2).

Exemple 1Example 1

Une feuille de non-tissé de 18 g/m² obtenue par le procédé dit " voie humide " est supportée par une toile en bronze de type tricot , comportant 32 fils dans le sens chaîne ,et 27 fils dans le sens trame . Cette feuille est soumise à l'action du dispositif représenté sur les figures 2 et 3 .An 18 g / m² non-woven sheet obtained by the so-called "wet process" is supported by a bronze fabric of knitting type, comprising 32 threads in the warp direction, and 27 threads in the weft direction. This sheet is subjected to the action of the device shown in Figures 2 and 3.

Le cylindreperforé 14 présente des orifices 16 de section rectangulaire de 0,8 mm dans le sens axial ( flè­che 19) , et 1,3 mm dans le sens tangentiel (flèche 20) , la distance entre ces orifices étant de 0,8 mm dans les deux directions .The perforated cylinder 14 has holes 16 of rectangular section 0.8 mm in the axial direction (arrow 19) and 1.3 mm in the tangential direction (arrow 20), the distance between these holes being 0.8 mm in both directions.

L'épaisseur du cylindre est de 0,4 mm et la section des orifices est identique à l'intérieur et à l'extérieur du cylindre.The thickness of the cylinder is 0.4 mm and the section of the holes is identical inside and outside the cylinder.

L'injecteur hydraulique comprend une plaque perforée de 0,3 mm d'épaisseur comportant trois rangées de trous de 0,28 mm de diamètre espacés de 1,6 mm ( d'axe en axe) sui­vant une génératrice , et de 1 mm entre les génératrices ( voir figure 3).The hydraulic injector comprises a perforated plate 0.3 mm thick comprising three rows of holes 0.28 mm in diameter spaced 1.6 mm (from axis to axis) along a generator, and 1 mm between the generators (see Figure 3).

La pression de l'eau dans l'injecteur est de 3,5 bars ( chambres 4 et 12) . Le cylindre est maintenu à 0,5 mm au-dessus de la feuille 1 et sa vitesse tangentielle de rotation ( flèche 18) est égale à la vitesse d'avancement de la feuille 1 ( flèche 2).The water pressure in the injector is 3.5 bars (chambers 4 and 12). The cylinder is held at 0.5 mm above the sheet 1 and its tangential speed of rotation (arrow 18) is equal to the speed of advancement of the sheet 1 (arrow 2).

Le traitement de la feuille 1 effectué dans ces con­ditions permet l'obtention d'une feuille présentant un des­sin absolument parfait et uniforme correspondant aux perfo­ rations du cylindre 14 sur toute la surface de la feuille 1. Un traitement similaire ,effectué sur la même feuille 1 , mais en remplaçant l'injecteur à aiguilels 7 par un injec­teur de type " rideau " délivrant un rideau d'eau continu de 0,12 mm d'épaisseur suivant toute la largeur de la feuil­le , ne permettrait pas d'obtenir d'assu bons résultats , de nombreuses parties de la feuille 1 présentant alors un as­pect délavé.The treatment of sheet 1 carried out under these conditions makes it possible to obtain a sheet having an absolutely perfect and uniform design corresponding to the perfo rations of the cylinder 14 over the entire surface of the sheet 1. A similar treatment, carried out on the same sheet 1, but replacing the needle injector 7 by a "curtain" type injector delivering a continuous curtain of water from 0 , 12 mm thick along the entire width of the sheet, would not achieve good results, many parts of the sheet 1 then having a washed out appearance.

Exemple 2Example 2

Une feuille de plastique de 30 microns d'épaisseur est soumise à l'action du dispositif précédent.A plastic sheet 30 microns thick is subjected to the action of the above device.

Le même cylindre 14 que précédemment est utilisé.The same cylinder 14 as above is used.

La feuille 1 est posée sur une toile de support en acier inoxydable de type " uni " , comportant 7 fils au cm , dans les sens chaîne et trame.Sheet 1 is placed on a stainless steel support fabric of the "plain" type, comprising 7 threads per cm, in the warp and weft directions.

La plaque perforée 5 de l'injecteur comporte une seule rangée de trous 6 , de 0,12 mm de diamètre, espacés les uns des autres de 1,6 mm .The perforated plate 5 of the injector has a single row of holes 6, 0.12 mm in diameter, spaced from each other by 1.6 mm.

La plaque perforée 5 est positionnée de telle sor­te que les aiguilles d 'eau 7 se trouvent situées approxima­tivement au milieu des orifices 16 du cylindre perforé 14 . La pression de l'eau dans l'injecteur est de 150 bars et la vitesse de traitement de 25 mètres /mn .The perforated plate 5 is positioned so that the water needles 7 are located approximately in the middle of the orifices 16 of the perforated cylinder 14. The water pressure in the injector is 150 bars and the treatment speed 25 meters / min.

Le cylindre se trouve à 1 mm au-dessus de la toile ( intervalle 17) , et sa vitesse tangentielle de rotation (flèche 18) est égale à la vitesse d'avancement de la feuil­le 1 et de sa toile ( flèche 2).The cylinder is located 1 mm above the fabric (interval 17), and its tangential speed of rotation (arrow 18) is equal to the speed of advance of the sheet 1 and its fabric (arrow 2).

La feuille de plastique 1 est perforée sous forme de fines fentes rectangulaires , de 0,8 mm de longueur et de largeur non mesurable.The plastic sheet 1 is perforated in the form of thin rectangular slots, 0.8 mm in length and non-measurable width.

La résistance dans le sens transversal de la feuil­le 1 est considérablement réduite , et sa porosité est très augmentée.The resistance in the transverse direction of the sheet 1 is considerably reduced, and its porosity is greatly increased.

Après perforation , la feuille 1 soumise à un jet d'eau n'est plus imperméable.After perforation, the sheet 1 subjected to a jet of water is no longer waterproof.

Exemple 3Example 3

La même feuille 1 est soumise à un traitement si­milaire .La seule différence avec le traitement précédent est la vitesse de rotation du cylindre 14 qui donne une vi­ tesse tangentielle ( flèche 18) de 120 mètres par minute ( soit environ cinq fois la vitesse d'avancement de la feuille 1 ( flèche 2).The same sheet 1 is subjected to a similar treatment. The only difference with the previous treatment is the speed of rotation of the cylinder 14 which gives a vi tangential tesse (arrow 18) of 120 meters per minute (about five times the speed of advancement of sheet 1 (arrow 2).

Les autres conditions restent inchangées.The other conditions remain unchanged.

La feuille de plastique 1 est maintenant perforée par une multitude de petits trous dont les dimensions ne sont pas mesurables.The plastic sheet 1 is now punctured by a multitude of small holes whose dimensions are not measurable.

La perméabilité à l'air de la feuille est excel­lente , et sa résistance transversale est peu affectée . La feuille soumise à un jet d'eau reste également imperméa­ble . Enfin , le film plastique a perdu son " sonnant " caractéristique .The air permeability of the sheet is excellent, and its transverse resistance is little affected. The sheet subjected to a jet of water also remains waterproof. Finally, the plastic film has lost its characteristic "sound".

Claims (9)

1- Procédé pour la fabrication d'une feuille (1) d'un matériau porté par une bande transporteuse poreuse avan­çant sous un injecteur hydraulique transversal fixe (3) qui délivré des aiguilles d'eau (7) distinctes les unes des , ces aiguilles (7) étant obtenues par l'intermédiai­re d'une plaque perforée (5), percée de trous (6) distin­cts les uns des autres, caractérisé en ce qu'entre les ai­guilles d'eau (7) de l'injecteur et la feuille (1) à trai­ter, on intercale un organe ajouré mobile qui interrompt par intervalles le passage des aiguilles d'eau (7).1- Method for the manufacture of a sheet (1) of a material carried by a porous conveyor belt advancing under a fixed transverse hydraulic injector (3) which delivers water needles (7) distinct from each other, these needles (7) being obtained by means of a perforated plate (5), pierced with holes (6) distinct from each other, characterized in that between the water needles (7) of the injector and the sheet (1) to be treated, a movable openwork member is interposed which interrupts the passage of the water needles (7) at intervals. 2- Procédé suivant la revendication 1, caractérisé en ce que l'injecteur hydraulique est alimenté avec de l'eau sous une pression comprise entre 140 et 500 bars.2- A method according to claim 1, characterized in that the hydraulic injector is supplied with water at a pressure between 140 and 500 bars. 3- Procédé suivant la revendication 1, caractérisé en ce que l'organe ajouré est un cylindre rotatif (14) disposé autour de l'injecteur, et sur la paroi (15) du­quel, sont répartis des orifices (16).3- A method according to claim 1, characterized in that the perforated member is a rotary cylinder (14) disposed around the injector, and on the wall (15) of which are distributed orifices (16). 4- Procédé suivant la revendication 3, caractérisé en ce qu'entre le cylindre rotatif ajouré (14) et la feuille à traiter (1) est laissé un interstice libre.(17), si bien que la vitesse tangentielle (flèche (18)) du cylindre (14) a une valeur indépendante de la valeur de la vitesse d'a­vancement de la feuille (1) (flèche (2)).4- A method according to claim 3, characterized in that between the perforated rotary cylinder (14) and the sheet to be treated (1) is left a free gap. (17), so that the tangential speed (arrow (18) ) of the cylinder (14) has a value independent of the value of the speed of advance of the sheet (1) (arrow (2)). 5- Dispositif pour la mise en oeuvre du procédé sui­vant l'une quelconque des revendications 1 à 4, caracté­risé en ce que, sous le corps (3) de l'injecteur, est ser­rée par des mors longitudinaux (8) et (9), une plaque (5) munie de micro-perforations (6), surmontée par une cham­bre à eau (4) pour créer des aiguilles d'eau (7).5- Device for implementing the method according to any one of claims 1 to 4, characterized in that, under the body (3) of the injector, is clamped by longitudinal jaws (8) and (9) , a plate (5) provided with micro-perforations (6), surmounted by a water chamber (4) to create water needles (7). 6- Dispositif suivant la revendication 5, caracté­risé en ce que le serrage de la plaque (5) est assuré par des vérins hydrauliques (10), qu'il suffit de relâcher, pour extraire la plaque (5) en la tirant transversale­ment sur la machine (flèche (11)).6- Device according to claim 5, characterized in that the tightening of the plate (5) is ensured by hydraulic cylinders (10), which suffices to release, to extract the plate (5) by pulling it transversely on the machine (arrow (11)). 7- Dispositif suivant l'une quelconque des revendi­cations 5 et 6 , caractérisé en ce que les micro-­perforations ( 6 ) sont réparties le long de la pla­que ( 5 ) suivant plusieurs rangées parallèles où elles sont décalées d'une rangée à l'autre.7- Device according to any one of claims 5 and 6, characterized in that the micro-perforations (6) are distributed along the plate (5) in several parallel rows where they are shifted from one row to another. 8- Feuille munie de motifs en creux et en relief, caractérisée en ce qu'elle est obtenue par la mise en oeuvre du procédé suivant l'une quelconque des reven­dications 1 à 4.8- Sheet provided with intaglio and raised patterns, characterized in that it is obtained by implementing the method according to any one of claims 1 to 4. 9- Feuille munie de perforations, caractérisée en ce qu'elle est obtenue par la mise en oeuvre du procé­dé suivant l'une quelconque des revendications 1 à 4.9- Sheet provided with perforations, characterized in that it is obtained by the implementation of the method according to any one of claims 1 to 4.
EP19890420086 1988-01-19 1989-03-09 Apparatus for perforating a web Expired - Lifetime EP0400249B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE1989615748 DE68915748T2 (en) 1989-03-09 1989-03-09 Device for perforating a sheet-like product.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8801004A FR2625937B1 (en) 1988-01-19 1988-01-19 METHOD AND DEVICE FOR PERFORATING A SHEET PRODUCT, AND PERFORATED PRODUCT THUS OBTAINED

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EP0400249A1 true EP0400249A1 (en) 1990-12-05
EP0400249B1 EP0400249B1 (en) 1994-06-01

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US5727292A (en) * 1995-03-02 1998-03-17 Icbt Perfojet Installation for the production of nonwoven webs, the cohesion of which is obtained by the action of fluid jets
US6699353B1 (en) 1999-01-20 2004-03-02 Ahlstrom Lystil Sa Use of an air permeable paper sheet as support element for a stack of fabrics
US9687641B2 (en) 2010-05-04 2017-06-27 Corium International, Inc. Method and device for transdermal delivery of parathyroid hormone using a microprojection array
US9962534B2 (en) 2013-03-15 2018-05-08 Corium International, Inc. Microarray for delivery of therapeutic agent, methods of use, and methods of making
US10195409B2 (en) 2013-03-15 2019-02-05 Corium International, Inc. Multiple impact microprojection applicators and methods of use
US10238848B2 (en) 2007-04-16 2019-03-26 Corium International, Inc. Solvent-cast microprotrusion arrays containing active ingredient
US10245422B2 (en) 2013-03-12 2019-04-02 Corium International, Inc. Microprojection applicators and methods of use
US10384046B2 (en) 2013-03-15 2019-08-20 Corium, Inc. Microarray for delivery of therapeutic agent and methods of use
US10384045B2 (en) 2013-03-15 2019-08-20 Corium, Inc. Microarray with polymer-free microstructures, methods of making, and methods of use
US10624843B2 (en) 2014-09-04 2020-04-21 Corium, Inc. Microstructure array, methods of making, and methods of use
US10857093B2 (en) 2015-06-29 2020-12-08 Corium, Inc. Microarray for delivery of therapeutic agent, methods of use, and methods of making
US11052231B2 (en) 2012-12-21 2021-07-06 Corium, Inc. Microarray for delivery of therapeutic agent and methods of use

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US7828827B2 (en) 2002-05-24 2010-11-09 Corium International, Inc. Method of exfoliation of skin using closely-packed microstructures
US6821281B2 (en) 2000-10-16 2004-11-23 The Procter & Gamble Company Microstructures for treating and conditioning skin
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WO2008091602A2 (en) 2007-01-22 2008-07-31 Corium International, Inc. Applicators for microneedle arrays
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Publication number Priority date Publication date Assignee Title
US5727292A (en) * 1995-03-02 1998-03-17 Icbt Perfojet Installation for the production of nonwoven webs, the cohesion of which is obtained by the action of fluid jets
US6699353B1 (en) 1999-01-20 2004-03-02 Ahlstrom Lystil Sa Use of an air permeable paper sheet as support element for a stack of fabrics
US10238848B2 (en) 2007-04-16 2019-03-26 Corium International, Inc. Solvent-cast microprotrusion arrays containing active ingredient
US9687641B2 (en) 2010-05-04 2017-06-27 Corium International, Inc. Method and device for transdermal delivery of parathyroid hormone using a microprojection array
US11419816B2 (en) 2010-05-04 2022-08-23 Corium, Inc. Method and device for transdermal delivery of parathyroid hormone using a microprojection array
US11052231B2 (en) 2012-12-21 2021-07-06 Corium, Inc. Microarray for delivery of therapeutic agent and methods of use
US10245422B2 (en) 2013-03-12 2019-04-02 Corium International, Inc. Microprojection applicators and methods of use
US11110259B2 (en) 2013-03-12 2021-09-07 Corium, Inc. Microprojection applicators and methods of use
US9962534B2 (en) 2013-03-15 2018-05-08 Corium International, Inc. Microarray for delivery of therapeutic agent, methods of use, and methods of making
US10384045B2 (en) 2013-03-15 2019-08-20 Corium, Inc. Microarray with polymer-free microstructures, methods of making, and methods of use
US10384046B2 (en) 2013-03-15 2019-08-20 Corium, Inc. Microarray for delivery of therapeutic agent and methods of use
US10195409B2 (en) 2013-03-15 2019-02-05 Corium International, Inc. Multiple impact microprojection applicators and methods of use
US11565097B2 (en) 2013-03-15 2023-01-31 Corium Pharma Solutions, Inc. Microarray for delivery of therapeutic agent and methods of use
US10624843B2 (en) 2014-09-04 2020-04-21 Corium, Inc. Microstructure array, methods of making, and methods of use
US10857093B2 (en) 2015-06-29 2020-12-08 Corium, Inc. Microarray for delivery of therapeutic agent, methods of use, and methods of making

Also Published As

Publication number Publication date
FR2625937B1 (en) 1993-04-30
EP0400249B1 (en) 1994-06-01
FR2625937A1 (en) 1989-07-21

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