EP0620087A1 - Apparatus and method for perforating films - Google Patents

Apparatus and method for perforating films Download PDF

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Publication number
EP0620087A1
EP0620087A1 EP94870028A EP94870028A EP0620087A1 EP 0620087 A1 EP0620087 A1 EP 0620087A1 EP 94870028 A EP94870028 A EP 94870028A EP 94870028 A EP94870028 A EP 94870028A EP 0620087 A1 EP0620087 A1 EP 0620087A1
Authority
EP
European Patent Office
Prior art keywords
sleeves
cylinder
holes
discs
small
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
EP94870028A
Other languages
German (de)
French (fr)
Other versions
EP0620087B1 (en
Inventor
Frans Marijn Faddar
Luc Faddar
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
MACHINE SERVICE NV
Machine-Service Nv NV
Original Assignee
MACHINE SERVICE NV
Machine-Service Nv NV
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Publication date
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Publication of EP0620087A1 publication Critical patent/EP0620087A1/en
Application granted granted Critical
Publication of EP0620087B1 publication Critical patent/EP0620087B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/18—Means for removing cut-out material or waste
    • B26D7/1845—Means for removing cut-out material or waste by non mechanical means
    • B26D7/1854—Means for removing cut-out material or waste by non mechanical means by air under pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/18—Means for removing cut-out material or waste
    • B26D7/1845—Means for removing cut-out material or waste by non mechanical means
    • B26D7/1863—Means for removing cut-out material or waste by non mechanical means by suction
    • 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
    • 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
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/384—Cutting-out; Stamping-out using rotating drums
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y10T83/0405—With preparatory or simultaneous ancillary treatment of work
    • Y10T83/041—By heating or cooling
    • Y10T83/0414—At localized area [e.g., line of separation]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y10T83/0448—With subsequent handling [i.e., of product]
    • Y10T83/0453—By fluid application
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/202—With product handling means
    • Y10T83/2066—By fluid current
    • Y10T83/207—By suction means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/465—Cutting motion of tool has component in direction of moving work
    • Y10T83/4766—Orbital motion of cutting blade
    • Y10T83/4795—Rotary tool
    • Y10T83/483—With cooperating rotary cutter or backup
    • Y10T83/4836—With radial overlap of the cutting members

Definitions

  • the present invention relates to a method for perforating films, more specifically films of synthetic material, such as all possible types of so-called stretch films, high density films, polyethylene films, polypropylene, etc.
  • the present invention relates to a method for practicing, in an effective and rational manner, perforations with relatively large dimensions in films, for example in the case of circular perforations of the order of 6 to 60 mm.
  • the present invention also relates to a device which implements the aforementioned method, as well as films which are obtained with such a method, respectively such a device.
  • a first known device for the application of small perforations of this type in film materials is constituted by a matrix through which the film runs, and by which the running of this film through the matrix takes place in a stepwise fashion. not, in other words by which, when applying a series of perforations, the film material must be constantly stopped.
  • This known device cannot be used effectively in any way for the application of relatively large-sized perforations in film materials, since it works very slowly by the very nature of the task. on the one hand, and that the evacuation of the small cut discs is difficult or even impossible, especially when the film material is very thin, since then these small discs often remain attached to the film material, that it is either by tait that it has not been completely pierced, or by the presence of the static electric charge in the material by which the small detached disks continue to adhere.
  • beads are used to make the perforations, which are forcefully propelled through a hollow pipe on which films to be perforated are placed.
  • This second known device has all the drawbacks associated with the first known device mentioned above.
  • a third known device to make small diameter perforations in a film material, needles are used which perforate the film material.
  • this third device has the additional drawback that the perforations are only formed by the needles which pass through the material, so that one does not obtain real openings.
  • the subject of the present invention is a film material provided with large perforations, which can be produced in a very simple and rapid manner and which is intended mainly to become a packaging material for flowers, plants, vegetables, fruit, food, in general for example food which must be frozen, in other words products from which an efficient packaging must be obtained which allows, at the same time, a very effective and important ventilation of the products.
  • a method and a device are proposed which make it possible to provide relatively large perforations with all possible packaging materials, up to and including an extremely thin film material which of course has a very high elasticity, as well as so-called shrink films, which was impossible with the methods and devices known so far.
  • the method according to the invention which has the advantages mentioned as well as others, consists mainly of the fact of practicing successive series of perforations by means of heated sleeves; to grab the small cut discs; and keep these little discs away from the film in this way, making sure they are cut.
  • An advantageous device which implements the method according to the invention, is characterized in that it is formed mainly by two cylinders rotating one against the other, one of which is provided with means for cutting by heating small discs outside the film, while the second cylinder is provided with means which can grasp the small cut discs.
  • FIG. 1 schematically represents a device for implementing the method according to the invention, by which the main elements of this device are formed by a feed roller 1 on which the film material 2 to be treated is placed, a braking cylinder 3 for tensioning the film material 2, rollers 4-5 cooperating mutually to make relatively large perforations in the film material 2, respectively, to move the small cut disks away from the film material 2, by which the film material 2 passes around the roller 5 and finally, a driving roller 6 for the film material 2, which has for task of keeping the latter taut in cooperation with the brake cylinder 3 while waiting for the perforated film material to be wound up on a feed roller 7.
  • the cylinder 4 is constituted, according to the invention, mainly by a thick-walled sleeve 8 in which are made several holes 9 which are arranged in accordance with a well-defined configuration, for example in this case, in parallel rows, the holes 9 being placed in a zigzag.
  • the sleeves 10 are made of copper and are fixed, for example by welding, to a strip 11, for example also made of copper, in which is installed an electrical resistance 12 which, suitably, for example by electrical conduits 13- 14, is connected to an electrical circuit.
  • each slat 11 On each slat 11 is applied a strip of insulating material 15 in which holes for the sleeves 10 have been hollowed out so that, when the slats 11 are fixed by means of suitable screws 16 with the tightening nut 17 against the inner wall of the tube 8, no thermal contact is formed between the slats 11 and the cylinder 4.
  • the cylinder 5 according to the invention is also formed by a thick-walled tube 18 in which holes 19 are made, the diameter of which is preferably equal to the diameter of the holes 9 made in the tube 8 and by which these holes 19 are made in the tube 18, in accordance with the same configuration as the configuration of the holes 9 in the tube 8.
  • a sleeve 20 is provided, the free end of which coincides with the periphery of the tube 18 and by which the sleeves of one and the same row are fixed to a common channel 21 which can be formed by a suitable tube, the passage 22 of which is in connection with the passages 23 made in the corresponding sockets 20.
  • This channel 21 gives, at one end of the cylinder 5, to a passage 24 formed in the flange 25 of the cylinder 5, in which the ends of the tubes 21 are also housed.
  • the other ends of the tubes 21 are housed identically in a flange 26, these flanges 25 and 26 being fixed with the tube 18 by means of screws or the like, not shown.
  • the aforementioned circular notches 30 and 31 extend at an angle of 90 ° and are placed diametrically relative to one another, the suction notch 30 being disposed above.
  • the film material 2 which, by the cooperation of the cylinders 3 and 6, is placed in a taut fashion through the device, passes between the cylinders 4 and 5 where the first comes into contact with a defined row of sleeves 10 which are reheated to a suitable temperature so that they can penetrate through the film material 2.
  • a corresponding row of sockets 20 is placed against the notch 30 by means of which the cylinder 5 is connected to a vacuum pump or the like, so that when the corresponding sockets 20 are placed against the film material, the small disks 32 released by means of the corresponding sleeves 10 are sucked against the sockets 20.
  • the sleeves 10 will pass through the film 2 in the manner of a heated knife; after which, these sleeves 10 are placed in the holes 19 made in the tube 18 of the cylinder 5 and, in this way, the film 2, more specifically the small disks 32 come into contact with the sockets 20.
  • the size of the perforations can be modified by choosing other cylinders 4, respectively 5, the sleeves 10 of which have the shape and dimensions of the desired perforation.

Abstract

Method for perforating films, characterised in that it consists mainly in the fact that successive series of perforations are made by means of heated sleeve tubes (10); the small discs (32) cut out are grasped; and these small discs (32) are moved away from the film (2) in this way, so that they are actually cut away. <IMAGE>

Description

La présente invention concerne un procédé pour la perforation de films, plus spécifiquement des films en matière synthétique, tels que tous les types possibles de ce que l'on appelle des films d'étirage, des films haute densité, des films en polyéthylène, en polypropylène, etc.The present invention relates to a method for perforating films, more specifically films of synthetic material, such as all possible types of so-called stretch films, high density films, polyethylene films, polypropylene, etc.

Plus spécifiquement encore, la présente invention concerne un procédé pour pratiquer, de manière efficace et rationnelle, des perforations à dimensions relativement grandes dans des films, par exemple dans le cas de perforations circulaires de l'ordre de 6 à 60 mm.More specifically still, the present invention relates to a method for practicing, in an effective and rational manner, perforations with relatively large dimensions in films, for example in the case of circular perforations of the order of 6 to 60 mm.

La présente invention concerne également un dispositif qui met en oeuvre le procédé précité, ainsi que des films que l'on obtient avec un tel procédé, respectivement un tel dispositif.The present invention also relates to a device which implements the aforementioned method, as well as films which are obtained with such a method, respectively such a device.

On ne connait jusqu'à présent aucun procédé, respectivement aucun dispositif pour pratiquer des perforations relativement grandes dans des matières en film.Until now, no method or device has been known, respectively, for producing relatively large perforations in film materials.

On connaît, il est vrai, déjà des procédés et/ou des dispositifs pour l'application de perforations relativement petites dans des matières en film, en d'autres termes des perforations ayant un diamètre maximal de 6 mm.It is known, it is true, already methods and / or devices for the application of relatively small perforations in film materials, in other words perforations having a maximum diameter of 6 mm.

Un premier dispositif connu pour l'application de petites perforations de ce type dans des matières en film est constitué par une matrice à travers laquelle défile le film, et par lequel le défilement de ce film à travers la matrice a lieu en pas-à-pas, en d'autres termes par lequel, lors de l'application d'une série de perforations, on doit constamment arrêter la matière en film.A first known device for the application of small perforations of this type in film materials is constituted by a matrix through which the film runs, and by which the running of this film through the matrix takes place in a stepwise fashion. not, in other words by which, when applying a series of perforations, the film material must be constantly stopped.

Ce dispositif connu ne peut être mis en oeuvre de manière efficace de quelque manière que ce soit pour l'application dans des matières en film de perforations à dimensions relativement grandes, étant donné qu'il travaille très lentement de par la nature même de la tâche, d'une part, et que l'évacuation des petits disques découpés est difficile, voire impossible, surtout lorsque la matière en film est très mince, étant donné qu'alors, ces petits disques restent souvent accrochés à la matière en film, que ce soit par le tait qu'elle n'a pas été complètement percée, ou encore par la présence de la charge électrique statique dans la matière par laquelle les petits disques détachés continuent d'adhérer.This known device cannot be used effectively in any way for the application of relatively large-sized perforations in film materials, since it works very slowly by the very nature of the task. on the one hand, and that the evacuation of the small cut discs is difficult or even impossible, especially when the film material is very thin, since then these small discs often remain attached to the film material, that it is either by tait that it has not been completely pierced, or by the presence of the static electric charge in the material by which the small detached disks continue to adhere.

Dans un deuxième dispositif connu, on utilise, pour pratiquer les perforations, des billes que l'on propulse avec force à travers un tuyau creux sur lequel on place des films à perforer.In a second known device, beads are used to make the perforations, which are forcefully propelled through a hollow pipe on which films to be perforated are placed.

Ce deuxième dispositif connu présente tous les inconvénients liés au premier dispositif connu mentionnés ci-dessus.This second known device has all the drawbacks associated with the first known device mentioned above.

Dans un troisième dispositif connu, pour pratiquer des perforations à petit diamètre dans une matière en film, on utilise des aiguilles qui perforent la matière en film.In a third known device, to make small diameter perforations in a film material, needles are used which perforate the film material.

Outre les inconvénients mentionnés ci-avant, liés aux deux dispositifs connus cités en premier lieu, ce troisième dispositif présente l'inconvénient supplémentaire que les perforations sont seulement formées par les aiguilles qui traversent la matière, si bien que l'on n'obtient pas de véritables ouvertures.In addition to the drawbacks mentioned above, linked to the two known devices mentioned first, this third device has the additional drawback that the perforations are only formed by the needles which pass through the material, so that one does not obtain real openings.

Il est clair que la matière que l'on obtient par l'application de petites perforations avec un des dispositifs connus précédemment ne jouit que d'une application limitée, par exemple uniquement comme films pour l'agriculture, en d'autres termes des films pour recouvrir de grandes surfaces.It is clear that the material obtained by the application of small perforations with one of the previously known devices enjoys only limited application, for example only as films for agriculture, in other words films to cover large areas.

En revanche, la présente Invention a pour objet une matière en film munie de grandes perforations, qui peut être réalisée de manière très simple et rapide et qui est destinée principalement à devenir une matière d'emballage pour des fleurs, des plantes, des légumes, des fruits, des aliments, en général par exemple des aliments qui doivent être congelés, en d'autres termes des produits à propos desquels on doit obtenir un emballage efficace qui permet, en même temps, une aération très efficace et importante des produits.On the other hand, the subject of the present invention is a film material provided with large perforations, which can be produced in a very simple and rapid manner and which is intended mainly to become a packaging material for flowers, plants, vegetables, fruit, food, in general for example food which must be frozen, in other words products from which an efficient packaging must be obtained which allows, at the same time, a very effective and important ventilation of the products.

Conformément à la présente invention, on propose un procédé et un dispositif qui permettent de munir de perforations relativement grandes toutes les matières d'emballage possibles, jusqu'à et y compris une matière en film extrêmement mince qui possède bien entendu une très grande élasticité, ainsi que ce que l'on appelle des films rétractables, ce qui était impossible avec les procédés et les dispositifs connus jusqu'à présent.In accordance with the present invention, a method and a device are proposed which make it possible to provide relatively large perforations with all possible packaging materials, up to and including an extremely thin film material which of course has a very high elasticity, as well as so-called shrink films, which was impossible with the methods and devices known so far.

Le procédé selon l'invention, qui présente les avantages mentionnés ainsi que d'autres, est constitué principalement par le fait de pratiquer des séries successives de perforations au moyen de manchons réchauffés; de saisir les petits disques découpés; et d'éloigner de cette manière ces petits disques à l'écart du film, faisant en sorte qu'ils sont découpés.The method according to the invention, which has the advantages mentioned as well as others, consists mainly of the fact of practicing successive series of perforations by means of heated sleeves; to grab the small cut discs; and keep these little discs away from the film in this way, making sure they are cut.

Un dispositif avantageux, qui met en oeuvre le procédé selon l'invention, se caractérise en ce qu'il est formé principalement par deux cylindres tournant l'un contre l'autre, dont l'un est muni de moyens pour découper par réchauffement des petits disques hors du film, tandis que le second cylindre est muni de moyens qui peuvent saisir les petits disques découpés.An advantageous device, which implements the method according to the invention, is characterized in that it is formed mainly by two cylinders rotating one against the other, one of which is provided with means for cutting by heating small discs outside the film, while the second cylinder is provided with means which can grasp the small cut discs.

Dans le but de mieux faire ressortir les caractéristiques de l'invention, ci-après, on décrit, à titre d'exemple, sans aucun caractère limitatif, une forme de réalisation préférée en se référant aux dessins annexés dans lesquels:

  • la figure 1 est une représentation schématique d'un dispositif qui met en oeuvre le procédé conformément à l'invention;
  • la figure 2 est une vue en perspective selon la flèche F2 en figure 1;
  • la figure 3 est une coupe transversale a plus grande échelle, prise le long de la ligne III-III de la figure 2;
  • la figure 4 est une coupe transversale prise le long de la ligne IV-IV de la figure 3.
In order to better highlight the characteristics of the invention, hereinafter, a preferred embodiment is described, by way of example, without any limiting character, with reference to the accompanying drawings in which:
  • Figure 1 is a schematic representation of a device which implements the method according to the invention;
  • Figure 2 is a perspective view along arrow F2 in Figure 1;
  • Figure 3 is an enlarged cross section taken along the line III-III of Figure 2;
  • Figure 4 is a cross section taken along line IV-IV of Figure 3.

En figure 1, on représente schématiquement un dispositif pour la mise en oeuvre du procédé selon l'invention, par lequel les éléments principaux de ce dispositif sont formés par un rouleau d'alimentation 1 sur lequel est disposée la matière de film 2 à traiter, un cylindre de freinage 3 pour tendre la matière de film 2, des rouleaux 4-5 coopérant mutuellement pour pratiquer dans la matière de film 2 des perforations relativement grandes, respectivement, pour éloigner de la matière de film 2 les petits disques découpés, par lequel la matière de film 2 défile autour du rouleau 5 et enfin, un rouleau d'entraînement 6 pour la matière de film 2, qui a pour tâche de maintenir cette dernière tendue en coopération avec le cylindre de freinage 3 en attendant que la matière de film perforée soit enroulée sur un rouleau d'alimentation 7.FIG. 1 schematically represents a device for implementing the method according to the invention, by which the main elements of this device are formed by a feed roller 1 on which the film material 2 to be treated is placed, a braking cylinder 3 for tensioning the film material 2, rollers 4-5 cooperating mutually to make relatively large perforations in the film material 2, respectively, to move the small cut disks away from the film material 2, by which the film material 2 passes around the roller 5 and finally, a driving roller 6 for the film material 2, which has for task of keeping the latter taut in cooperation with the brake cylinder 3 while waiting for the perforated film material to be wound up on a feed roller 7.

Bien entendu, les différents cylindres sont entraînés chacun de manière appropriée pour faire en sorte que les différents cylindres travaillent de manière synchrone.Of course, the different cylinders are each driven appropriately to ensure that the different cylinders work synchronously.

Le cylindre 4 est constitué, conformément à l'invention, principalement par un manchon 8 à paroi épaisse dans lequel sont pratiqués plusieurs trous 9 qui sont arrangés conformément à une configuration bien définie, par exemple dans le cas présent, selon des rangées parallèles, les trous 9 étant placés en zigzag.The cylinder 4 is constituted, according to the invention, mainly by a thick-walled sleeve 8 in which are made several holes 9 which are arranged in accordance with a well-defined configuration, for example in this case, in parallel rows, the holes 9 being placed in a zigzag.

A travers chaque trou 9 formé de cette manière, est placé un manchon 10 dont le diamètre est inférieur au diamètre du trou 9 de telle sorte qu'il n'y ait pas de contact entre ce manchon 10 et le trou 9.Through each hole 9 formed in this way, a sleeve 10 is placed whose diameter is less than the diameter of the hole 9 so that there is no contact between this sleeve 10 and the hole 9.

De préférence, les manchons 10 sont réalisés en cuivre et sont fixés par exemple par soudage sur une latte 11, par exemple également en cuivre, dans laquelle est installée une résistance électrique 12 qui, de manière appropriée, par exemple par des conduits électriques 13-14, est raccordée à un circuit électrique.Preferably, the sleeves 10 are made of copper and are fixed, for example by welding, to a strip 11, for example also made of copper, in which is installed an electrical resistance 12 which, suitably, for example by electrical conduits 13- 14, is connected to an electrical circuit.

Sur chaque latte 11, est appliquée une bande de matière isolante 15 dans laquelle on a évidé des trous pour les manchons 10 de telle sorte que, lorsque les lattes 11 sont fixées au moyen de vis appropriées 16 avec l'écrou de serrage 17 contre la paroi interne du tube 8, il ne se forme aucun contact thermique entre les lattes 11 et le cylindre 4.On each slat 11 is applied a strip of insulating material 15 in which holes for the sleeves 10 have been hollowed out so that, when the slats 11 are fixed by means of suitable screws 16 with the tightening nut 17 against the inner wall of the tube 8, no thermal contact is formed between the slats 11 and the cylinder 4.

Le cylindre 5 selon l'invention est également formé par un tube 18 à paroi épaisse dans lequel sont pratiqués des trous 19 dont le diamètre est de préférence égal au diamètre des trous 9 pratiqués dans le tube 8 et par lequel ces trous 19 sont pratiqués dans le tube 18, conformément à la même configuration que la configuration des trous 9 dans le tube 8.The cylinder 5 according to the invention is also formed by a thick-walled tube 18 in which holes 19 are made, the diameter of which is preferably equal to the diameter of the holes 9 made in the tube 8 and by which these holes 19 are made in the tube 18, in accordance with the same configuration as the configuration of the holes 9 in the tube 8.

A travers chaque trou 19 dans le tube 18, on prévoit une douille 20 dont l'extrémité libre coïncide avec la périphérie du tube 18 et par lequel les douilles d'une seule et même rangée sont fixées à un canal commun 21 qui peut être formé par un tube approprié dont le passage 22 se trouve en liaison avec les passages 23 pratiqués dans les douilles correspondantes 20.Through each hole 19 in the tube 18, a sleeve 20 is provided, the free end of which coincides with the periphery of the tube 18 and by which the sleeves of one and the same row are fixed to a common channel 21 which can be formed by a suitable tube, the passage 22 of which is in connection with the passages 23 made in the corresponding sockets 20.

Ce canal 21 donne, à une extrémité du cylindre 5, sur un passage 24 pratiqué dans la bride 25 du cylindre 5, dans laquelle sont également logées les extrémités des tubes 21.This channel 21 gives, at one end of the cylinder 5, to a passage 24 formed in the flange 25 of the cylinder 5, in which the ends of the tubes 21 are also housed.

Les autres extrémités des tubes 21 sont logées d'une manière identique dans une bride 26, ces brides 25 et 26 étant fixées avec le tube 18 au moyen de vis ou analogues, non représentées.The other ends of the tubes 21 are housed identically in a flange 26, these flanges 25 and 26 being fixed with the tube 18 by means of screws or the like, not shown.

Il en va d'ailleurs de même pour le cylindre 4 qui est muni, à chacune de ses extrémités, de brides 27-28.The same goes for the cylinder 4 which is provided, at each of its ends, with flanges 27-28.

Contre la bride 25 du cylindre 5, est encore appliquée une bride fixe 29 dans laquelle sont pratiquées deux encoches circulaires 30 et 31.Against the flange 25 of the cylinder 5, a fixed flange 29 is still applied in which two circular notches 30 and 31 are made.

Les encoches circulaires susmentionnées 30 et 31 s'étendent en formant un angle de 90° et sont placées diamétralement l'une par rapport à l'autre, l'encoche d'aspiration 30 étant disposée au-dessus.The aforementioned circular notches 30 and 31 extend at an angle of 90 ° and are placed diametrically relative to one another, the suction notch 30 being disposed above.

La mise en oeuvre du dispositif tel que décrit ci-dessus est très simple et a lieu comme suit.The implementation of the device as described above is very simple and takes place as follows.

La matière de film 2 qui, par la coopération des cylindres 3 et 6, est placée de manière tendue a travers le dispositif, défile entre les cylindres 4 et 5 où le premier vient se mettre en contact avec une rangée définie de manchons 10 qui sont réchauffés a une température appropriée de telle sorte qu'ils puissent pénétrer à travers la matière de film 2.The film material 2 which, by the cooperation of the cylinders 3 and 6, is placed in a taut fashion through the device, passes between the cylinders 4 and 5 where the first comes into contact with a defined row of sleeves 10 which are reheated to a suitable temperature so that they can penetrate through the film material 2.

Au cours de ce mouvement, une rangée correspondante de douilles 20 est venue se disposer contre l'encoche 30 par l'intermédiaire de laquelle le cylindre 5 est raccordé a une pompe à vide ou analogues, de telle sorte que, lorsque les douilles correspondantes 20 viennent se mettre contre la matière de film, les petits disques 32 libérés au moyen des manchons correspondants 10 sont aspirés contre les douilles 20.During this movement, a corresponding row of sockets 20 is placed against the notch 30 by means of which the cylinder 5 is connected to a vacuum pump or the like, so that when the corresponding sockets 20 are placed against the film material, the small disks 32 released by means of the corresponding sleeves 10 are sucked against the sockets 20.

Au cours du déplacement des cylindres 4 et 5, les manchons 10 vont traverser le film 2 à la manière d'un couteau réchauffé; après quoi, ces manchons 10 viennent se disposer dans les trous 19 pratiqués dans le tube 18 du cylindre 5 et, de cette manière, le film 2, plus spécifiquement les petits disques 32 viennent se mettre en contact avec les douilles 20.During the displacement of the cylinders 4 and 5, the sleeves 10 will pass through the film 2 in the manner of a heated knife; after which, these sleeves 10 are placed in the holes 19 made in the tube 18 of the cylinder 5 and, in this way, the film 2, more specifically the small disks 32 come into contact with the sockets 20.

Au cours de la rotation ultérieure des cylindres 4 et 5, les manchons 10 vont à nouveau quitter les trous 19, faisant en sorte que les petits disques 32 sont éloignés du film 2 avec une grande sécurité par le fait que ces petits disques 32 restent fixés aux douilles 20 pendant un temps assez long.During the subsequent rotation of the cylinders 4 and 5, the sleeves 10 will again leave the holes 19, ensuring that the small discs 32 are moved away from the film 2 with great security by the fact that these small discs 32 remain attached to the sockets 20 for a fairly long time.

Lorsque le cylindre 5 poursuit encore sa rotation, le passage 24 pratiqué dans la bride 25 va passer devant l'encoche 30, si bien que l'aspiration des petits disques 32 disparait et que ces derniers, dès ce moment, peuvent tomber librement vers le bas dans un bac de récolte non représenté.When the cylinder 5 continues to rotate, the passage 24 in the flange 25 will pass in front of the notch 30, so that the suction of the small discs 32 disappears and the latter, from this moment, can fall freely towards the low in a collecting tank not shown.

Au cas où ces petits disques resteraient collés malgré tout contre les douilles 20 en question, on prévoit l'encoche 31 via laquelle on achemine de l'air sous pression le long du passage 24 pour aboutir dans les douilles en question 20, les petits disques 32 étant ainsi écartés par soufflage avec une grande sécurité.In the event that these small discs remain stuck despite everything against the sockets 20 in question, provision is made for the notch 31 via which pressurized air is conveyed along the passage 24 to reach the sockets in question 20, the small discs 32 thus being discarded by blowing with great security.

Il est clair que, de cette manière, on procure un dispositif par lequel il devient possible de pratiquer des perforations relativement grandes dans une matière de film très mince, indépendamment des caractéristiques spécifiques de cette dernière, avec la certitude absolue que ces perforations sont arrangées de manière correcte et que les petits disques écartés par poussée sont éloignés du film 2 avec une grande sécurité.It is clear that, in this way, a device is provided by which it becomes possible to make relatively large perforations in a very thin film material, independently of the specific characteristics of the latter, with the absolute certainty that these perforations are arranged from in a correct manner and that the small discs pushed apart are moved away from the film 2 with great safety.

Il est également évident que l'on peut modifier la grandeur des perforations en choisissant d'autres cylindres 4, respectivement 5, dont les manchons 10 présentent la forme et les dimensions de la perforation désirée.It is also obvious that the size of the perforations can be modified by choosing other cylinders 4, respectively 5, the sleeves 10 of which have the shape and dimensions of the desired perforation.

Le raccordement électrique des résistances 12 et le raccordement des dispositifs pour provoquer une pression inférieure et une pression supérieure ne sont pas représentés dans le dessin, étant donné qu'ils peuvent être réalisés de n'importe quelles manières connues en soi.The electrical connection of the resistors 12 and the connection of the devices for causing lower pressure and higher pressure are not shown in the drawing, since they can be made in any manner known per se.

Le procédé, respectivement le dispositif selon l'invention, ne sont bien entendu pas limité à l'exemple décrit et, dans la mise en oeuvre représentée dans les dessins annexés, mais il recouvre toutes les variantes possibles.The method, respectively the device according to the invention, is of course not limited to the example described and, in the implementation shown in the accompanying drawings, but it covers all possible variants.

Claims (14)

Procédé pour la perforation de films, caractérisé en ce qu'il est constitué principalement par le fait de pratiquer des séries successives de perforations au moyen de manchons réchauffés (10); de saisir les petits disques découpés (32); et d'éloigner de cette manière ces petits disques (32) à l'écart du film (2), faisant en sorte qu'ils sont découpés.A method for perforating films, characterized in that it consists mainly of practicing successive series of perforations by means of heated sleeves (10); to grasp the small cut discs (32); and in this way move these small discs (32) away from the film (2), ensuring that they are cut. Procédé selon la revendication 1, caractérisé en ce que les petits disques (32) éloignés du film (2) de cette manière sont écartés par soufflage.Method according to claim 1, characterized in that the small discs (32) spaced from the film (2) in this way are blown apart. Procédé selon la revendication 1 ou 2, caractérisé en ce que les manchons (10) sont fixés dans un cylindre (4) dont ils font saillie, par lequel ce cylindre est monté en rotation par rapport à un cylindre (5) dans lequel sont pratiqués des trous (19) dans lesquels les manchons (10) faisant saillie peuvent venir se loger lors de la rotation des cylindres (4-5), par lequel des douilles (20) sont placées dans ces trous (19) pour saisir les petits disques (32).Method according to claim 1 or 2, characterized in that the sleeves (10) are fixed in a cylinder (4) from which they project, by which this cylinder is mounted in rotation relative to a cylinder (5) in which are practiced holes (19) in which the protruding sleeves (10) can be housed during the rotation of the cylinders (4-5), by which sleeves (20) are placed in these holes (19) to grip the small discs (32). Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que, lors de la découpe des petits disques (32), les douilles (20) sont reliées à une pompe à vide, tandis que ces douilles (20) sont raccordées a de l'air sous pression après une rotation déterminée du cylindre correspondant.Method according to any one of the preceding claims, characterized in that, when cutting the small discs (32), the sleeves (20) are connected to a vacuum pump, while these sleeves (20) are connected to the air under pressure after a determined rotation of the corresponding cylinder. Dispositif pour la mise en oeuvre du procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est formé principalement par deux cylindres (4-5) tournant l'un contre l'autre, dont l'un est muni de moyens (10) pour découper par réchauffement des petits disques (32) hors du film (2), tandis que le second cylindre est muni de moyens (20) qui peuvent saisir les petits disques découpés (32).Device for implementing the method according to any one of the preceding claims, characterized in that it is formed mainly by two cylinders (4-5) rotating against each other, one of which is provided with means (10) for cutting by heating small discs (32) outside the film (2), while the second cylinder is provided with means (20) which can grip the small cut discs (32). Dispositif selon la revendication 5, caractérisé en ce que le cylindre (4) est muni de manchons traversant sa paroi externe, qui peuvent être réchauffés de manière appropriée et dont la forme et les dimensions correspondent a la forme des dimensions des perforations désirées.Device according to claim 5, characterized in that the cylinder (4) is provided with sleeves passing through its external wall, which can be suitably reheated and whose shape and dimensions correspond to the shape of the dimensions of the desired perforations. Dispositif selon la revendication 5, caractérisé en ce que le cylindre (5) est muni de trous (19) dans lesquels peuvent venir se loger les manchons (10) lors de la rotation des cylindres (4-5), par lequel on place des douilles (20) dans ces trous (19), qui peuvent être mises successivement en liaison avec une pompe à vide, respectivement de l'air sous pression.Device according to claim 5, characterized in that the cylinder (5) is provided with holes (19) in which the sleeves (10) can be accommodated during the rotation of the cylinders (4-5), by which are placed sockets (20) in these holes (19), which can be successively connected with a vacuum pump, respectively pressurized air. Dispositif selon la revendication 6, caractérisé en ce que les manchons (10) sont montés à travers des trous (9) pratiqués dans la paroi (8), dans lequel ces trous (9) sont plus grands que les dimensions correspondantes des manchons (10) et dans lequel les manchons (10) d'une même rangée sont fixés sur une latte commune (11) dans laquelle est prévu un élément de chauffage (12).Device according to claim 6, characterized in that the sleeves (10) are mounted through holes (9) made in the wall (8), in which these holes (9) are larger than the corresponding dimensions of the sleeves (10 ) and in which the sleeves (10) of the same row are fixed to a common slat (11) in which a heating element (12) is provided. Dispositif selon la revendication 6 ou 8, caractérisé en ce que les manchons (10) sont fixés dans le cylindre (4) de forme tubulaire au moyen de vis (16) à écrous (17), dans lequel, entre la paroi interne du tube (8) et chaque latte (11), on prévoit une matière (15) à faible isolation thermique.Device according to claim 6 or 8, characterized in that the sleeves (10) are fixed in the cylinder (4) of tubular form by means of screws (16) with nuts (17), in which, between the internal wall of the tube (8) and each slat (11), a material (15) with low thermal insulation is provided. Dispositif selon la revendication 7, caractérisé en ce que, dans le cylindre (5) de forme tubulaire, on pratique des trous (19) qui sont notablement plus grands que les dimensions correspondantes des manchons (10) pour pouvoir faire en sorte que, lors de la rotation mutuelle des cylindres (4-5), les manchons (10) puissent entrer dans ces trous (19), respectivement en sortir.Device according to claim 7, characterized in that, in the cylinder (5) of tubular shape, there is practiced holes (19) which are significantly larger than the corresponding dimensions of the sleeves (10) in order to be able to ensure that, during the mutual rotation of the cylinders (4-5), the sleeves (10) can enter these holes ( 19), respectively get out. Dispositif selon la revendication 7 ou 10, caractérisé en ce que, dans chaque trou (19), on prévoit une douille (20) qui est raccordée à un tube (21) qui s'étend sur toute la longueur du cylindre (5), et par lequel chaque douille présente un passage (23) qui se trouve en liaison avec un canal central (22) pratiqué dans le tube (21), par lequel ce canal (22) se trouve en liaison avec un passage (24) pratiqué dans une bride terminale (25) du cylindre (5).Device according to claim 7 or 10, characterized in that, in each hole (19), there is provided a socket (20) which is connected to a tube (21) which extends over the entire length of the cylinder (5), and by which each socket has a passage (23) which is in connection with a central channel (22) formed in the tube (21), by which this channel (22) is in connection with a passage (24) formed in a terminal flange (25) of the cylinder (5). Dispositif selon la revendication 11, caractérisé en ce que les dimensions d'une douille (20) sont notablement inférieures aux dimensions internes d'un manchon (10).Device according to claim 11, characterized in that the dimensions of a socket (20) are significantly smaller than the internal dimensions of a sleeve (10). Dispositif selon la revendication 7, 10, 11 ou 12, caractérisé en ce que la bride terminale précitée (25), dans laquelle on prévoit les passages (24), s'appuie contre une bride fixe (29) dans laquelle sont pratiquées deux encoches circulaires (30) et (31) dont l'une se trouve en relation avec un mécanisme d'aspiration, par exemple une pompe à vide, tandis que l'autre se trouve en liaison avec un mécanisme pour délivrer de l'air sous pression.Device according to claim 7, 10, 11 or 12, characterized in that the aforementioned end flange (25), in which the passages (24) are provided, bears against a fixed flange (29) in which two notches are made circular (30) and (31) one of which is in connection with a suction mechanism, for example a vacuum pump, while the other is in connection with a mechanism for delivering pressurized air . Dispositif selon la revendication 13, caractérisé en ce que les encoches circulaires (30) et (31) forment un angle de 90° et sont placées de manière diamétralement opposée, l'encoche d'aspiration se trouvant au-dessus.Device according to claim 13, characterized in that the circular notches (30) and (31) form an angle of 90 ° and are placed diametrically opposite, the suction notch being above.
EP94870028A 1993-02-17 1994-02-15 Apparatus and method for perforating films Expired - Lifetime EP0620087B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE9300148 1993-02-17
BE9300148A BE1006751A3 (en) 1993-02-17 1993-02-17 Method for perforating FOIL AND device which applies this method.

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EP0620087A1 true EP0620087A1 (en) 1994-10-19
EP0620087B1 EP0620087B1 (en) 1999-01-07

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EP (1) EP0620087B1 (en)
AT (1) ATE175376T1 (en)
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EP2359993A1 (en) * 2010-02-24 2011-08-24 Haff & Schneider GmbH & Co. OHG Device for die preparation for flat substrates
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CN103737648A (en) * 2014-01-08 2014-04-23 浙江诺比德机械科技有限公司 Elastic ribbon cutting device

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US11123893B2 (en) * 2018-07-18 2021-09-21 Roto-Die Company, Inc. Vacuum assist cutting and anvil cylinders
CN109849101A (en) * 2018-12-28 2019-06-07 东莞市威骏不织布有限公司 Farming land cloth aperture production method and equipment
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CN103737648A (en) * 2014-01-08 2014-04-23 浙江诺比德机械科技有限公司 Elastic ribbon cutting device

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US5449482A (en) 1995-09-12
ATE175376T1 (en) 1999-01-15
EP0620087B1 (en) 1999-01-07
BE1006751A3 (en) 1994-11-29
DE69415711D1 (en) 1999-02-18

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