WO1998036882A1 - Device for precision cutting of thin sheet material - Google Patents

Device for precision cutting of thin sheet material Download PDF

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Publication number
WO1998036882A1
WO1998036882A1 PCT/FR1998/000346 FR9800346W WO9836882A1 WO 1998036882 A1 WO1998036882 A1 WO 1998036882A1 FR 9800346 W FR9800346 W FR 9800346W WO 9836882 A1 WO9836882 A1 WO 9836882A1
Authority
WO
WIPO (PCT)
Prior art keywords
blade
cutting
sheath
support
upper film
Prior art date
Application number
PCT/FR1998/000346
Other languages
French (fr)
Inventor
Georges Chretien
Original Assignee
Tecnimodern Automation (Societe Anonyme)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tecnimodern Automation (Societe Anonyme) filed Critical Tecnimodern Automation (Societe Anonyme)
Priority to EP98910809A priority Critical patent/EP0963282B1/en
Priority to DE69803042T priority patent/DE69803042D1/en
Priority to AU65049/98A priority patent/AU6504998A/en
Publication of WO1998036882A1 publication Critical patent/WO1998036882A1/en

Links

Classifications

    • 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
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B26D7/2628—Means for adjusting the position of the cutting member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
    • 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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/04—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
    • B26D1/045—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member for thin material, e.g. for sheets, strips or the like
    • 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
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/08—Making a superficial cut in the surface of the work without removal of material, e.g. scoring, incising
    • B26D3/085—On sheet material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/003—Flexible containers made from webs starting from tubular webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B70/16—Cutting webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/74—Auxiliary operations
    • B31B70/81—Forming or attaching accessories, e.g. opening devices, closures or tear strings

Definitions

  • the object of the invention relates to the technical sector of means for cutting films of plastic material.
  • sheaths produced from a plastic film and intended to constitute sachets for packaging and bulk presentation of parts and articles of small dimensions are well known to professionals.
  • these sheaths produced from a single film or from two superimposed films are either wound on a core to form a coil, or presented flat at the level of bagging.
  • a sachet from films or sheath is most often carried out by knurling or transverse precuts on the two thicknesses of the film and the filling of the sachet is obtained after detachment of one of the films at a line pre-cut, and the bag is then closed by welding.
  • the transverse cutting or precut of one of the films can only be carried out by these machines over the entire width of the sheath, which significantly weakens the resistance of the sachet during filling.
  • the device according to the invention overcomes these drawbacks in that it makes it possible to achieve in a very precise rational manner the cross section of one of the films of the sheath produced, this over part of its width in order to preserve the sachet good resistance during filling and facilitate welding after filling.
  • the means used are simple and therefore economical, and ensure a long service life for the cutting member.
  • the cutting device consists of a cutting blade articulated pendulumly on a support and associated with a permanent holding means and at a constant angle relative to the upper film of a sheath that the blade pushes back during its movement by forming a bead allowing the cutting of a single upper film.
  • the means for permanently holding the cutting blade in contact with the upper film of the sheath is constituted by an adjustable counterweight, a return spring or an electromagnet.
  • the cutting blade is a blade with two opposite cutting edges, and mounted reversibly on its support.
  • Figure 1 is a block diagram illustrating the positioning and action of the blade relative to the upper film of a plastic sheath.
  • Figure 2 is a cross-sectional view of a sheath whose upper film has been cut by the device according to the invention.
  • FIG. 3 is a schematic plan view illustrating the sheath cut according to FIG. 2.
  • Figure 4 is a schematic view showing the main arrangements of the cutting device according to the invention.
  • Figures 5, 6 and 7 are respectively front, side and plan views illustrating an exemplary embodiment of the cutting device according to the invention.
  • the sachets are produced from a plastic film of the polyethylene or other type which is first of all shaped to constitute a sheath (G) of great length with an upper film (Gl) and a lower film (G2).
  • This sheath can be wound on a reel, in the case where the bagging and the welds are carried out independently of the formation of the sheath and the achievement of the transverse cutting of the upper film (Gl) or else the sheath is kept at flat and cutting, bagging and welding are carried out immediately downstream.
  • the sheath on either side of the cutting according to the invention is tensioned by all means and is driven by a feed movement determined according to the cutting operations and possibly welding to be performed on the sheath.
  • This advance movement can be obtained by any known means of the stepping motor type or others.
  • the actual cutting device, object of the invention consists of a blade (1) having at least one cutting edge.
  • a blade of the type commonly known as a “cutter” is used, that is to say of trapezoidal shape with two opposite cutting edges (la) and two notches (lb) or orifices intended to mount the blade. one side or the other on the axis (2a) of a support (2), this in a pendulum and at an angle ( ⁇ ) constant with respect to the sheath (G) of which it is to cut the film superior (Gl) and he alone.
  • the support (2) is itself subject to a gantry (3) slidably mounted on a crosspiece (4) arranged perpendicular to the direction of travel of the sheath in the case of application illustrated, it being understood that, as required, the blade and therefore the support, the gantry and the crosspiece could be arranged differently.
  • the blade (1) is equipped with a means allowing permanent contact of its cutting edge (la) on the upper film (Gl) of the sheath during the entire cutting operation.
  • This means can be, as illustrated an adjustable counterweight (5) or even a suitably calibrated return spring or an electromagnet.
  • a stop (6) intended to prevent the rebound of the blade
  • a member (7) for adjusting the position of the blade connects the gantry (3) and the support (2), as seen in Figure 5.
  • the movements of the blade (1) on the cross member are obtained and controlled by any means such as racks and stops, the blade advance being controlled by all mechanical, pneumatic, hydraulic or manual organs.
  • a cavity (8a) at the level of the blade to facilitate cutting and reduce wear on the cutting edge.
  • the table does not have a cavity, it is then made of non-abrasive material of the nylon or similar type.

Abstract

The invention concerns a device characterised in that it consists of a cutting blade (1) hinged in pendulum fashion on a support (2) and combined with means (5) permanently maintaining it at a constant angle (α) relative to a plastic sheath (G) formed of a film; the cutting blade only cutting the top film (G1) of the sheath when it is moved, by the formation of a bulge (b) on said top film.

Description

DTSPOSTTTF OE COUPE PRECISE D'UN M ATERTAU EN FEUILLE MINCE. DTSPOSTTTF OE PRECISE CUT OF A M ATERTAU IN THIN SHEET.
L'objet de l'invention se rattache au secteur technique des moyens de coupe de films en matériau plastique.The object of the invention relates to the technical sector of means for cutting films of plastic material.
Les gaines réalisées à partir d'un film en matière plastique et destinées à constituer des sachets d'emballage et de présentation en vrac de pièces et articles de petites dimensions, sont bien connues des professionnels.The sheaths produced from a plastic film and intended to constitute sachets for packaging and bulk presentation of parts and articles of small dimensions are well known to professionals.
Généralement, ces gaines, réalisées à partir d'un film simple ou de deux films superposés sont soit enroulées sur un noyau pour former une bobine, soit présentées à plat au niveau de l'ensachage.Generally, these sheaths, produced from a single film or from two superimposed films are either wound on a core to form a coil, or presented flat at the level of bagging.
La réalisation d'un sachet à partir de films ou de gaine s'opère le plus souvent par moletages ou prédécoupes transversaux sur les deux épaisseurs du film et le remplissage du sachet est obtenu après détachement d'un des films au niveau d'une ligne de prédécoupe, et le sachet est ensuite refermé par soudure.The production of a sachet from films or sheath is most often carried out by knurling or transverse precuts on the two thicknesses of the film and the filling of the sachet is obtained after detachment of one of the films at a line pre-cut, and the bag is then closed by welding.
On conçoit que cette mise en œuvre n'est pas très rationnelle car elle nécessite des opérations complexes et un outillage soumis à des contraintes mécaniques importantes provoquant une usure rapide et des réglages fréquents.It is understood that this implementation is not very rational because it requires complex operations and tools subject to significant mechanical stresses causing rapid wear and frequent adjustments.
De plus, elle ne permet pas d'obtenir un sachet esthétique et pratique, surtout dans le cas d'une réalisation à partir d'un film simple, du fait des soudures et prédécoupes inélégantes.In addition, it does not make it possible to obtain an aesthetic and practical bag, especially in the case of production from a simple film, due to the inelegant welds and precuts.
Selon l'invention, on a voulu, à partir de gaines enroulées sur bobine ou présentées à plat, réaliser des sachets d'une manière fiable, rapide, économique, grâce à un dispositif assurant la coupe transversale seulement d'un des films de la gaine sans atteindre l'autre film quelles que soient les modalités de mise en œuvre. Il existe bien des machines assurant la coupe d'un des films d'une gaine en matière plastique, mais elles mettent en œuvre une technique très sophistiquée donc complexe pour tenter d'assurer une coupe ou prédécoupe nette en fonction des variations d'épaisseurs des films avec, paradoxalement un réglage micrométrique manuel, ce qui en fait n'apporte aucune garantie de résultat.According to the invention, it was desired, from sheaths wound on a reel or presented flat, to produce sachets in a reliable, rapid, economical manner, by means of a device ensuring the cross section only of one of the films of the sheath without reaching the other film whatever the methods of implementation. There are many machines ensuring the cutting of one of the films of a plastic sheath, but they implement a very sophisticated technique therefore complex in an attempt to ensure a clean cut or precut according to the variations in thickness of the films with, paradoxically a manual micrometric adjustment, which in fact does not provide any guarantee of result.
D'autre part, la coupe ou prédécoupe transversale d'un des films ne peut être réalisée par ces machines que sur toute la largeur de la gaine ce qui affaiblit notablement la résistance du sachet lors du remplissage.On the other hand, the transverse cutting or precut of one of the films can only be carried out by these machines over the entire width of the sheath, which significantly weakens the resistance of the sachet during filling.
Le dispositif selon l'invention remédie à ces inconvénients en ce sens qu'il permet de réaliser de manière rationnelle très précise la coupe transversale d'un des films de la gaine produite, cela sur une partie de sa largeur afin de conserver au sachet une bonne résistance lors du remplissage et de faciliter la soudure après remplissage. D'autre part, les moyens mise en œuvre sont simples donc économiques, et assurent une longévité importante à l'organe de coupe.The device according to the invention overcomes these drawbacks in that it makes it possible to achieve in a very precise rational manner the cross section of one of the films of the sheath produced, this over part of its width in order to preserve the sachet good resistance during filling and facilitate welding after filling. On the other hand, the means used are simple and therefore economical, and ensure a long service life for the cutting member.
Pour cela, et selon une première caractéristique, le dispositif de coupe est constitué d'une lame tranchante articulée de manière pendulaire sur un support et associée à un moyen de maintien permanent et sous un angle constant par rapport au film supérieur d'une gaine que la lame refoule lors de son déplacement en formant un bourrelet autorisant la coupe dU seul film supérieur.For this, and according to a first characteristic, the cutting device consists of a cutting blade articulated pendulumly on a support and associated with a permanent holding means and at a constant angle relative to the upper film of a sheath that the blade pushes back during its movement by forming a bead allowing the cutting of a single upper film.
Une autre caractéristique se trouve dans le fait que le moyen de maintien permanent de la lame de coupe en contact avec le film supérieur de la gaine, est constitué par un contrepoids réglable, un ressort de rappel ou un électroaimant.Another characteristic is that the means for permanently holding the cutting blade in contact with the upper film of the sheath is constituted by an adjustable counterweight, a return spring or an electromagnet.
Selon une autre caractéristique, la lame de coupe est une lame à deux arêtes tranchantes opposées, et montée de manière réversible sur son support. Ces caractéristiques et d'autres ressortiront de la description qui suit.According to another characteristic, the cutting blade is a blade with two opposite cutting edges, and mounted reversibly on its support. These and other features will become apparent from the following description.
Pour fixer l'objet de l'invention sans toutefois le limiter dans les dessins annexés :To fix the subject of the invention without however limiting it in the appended drawings:
La figure 1 est un schéma de principe illustrant le positionnement et l'action de la lame par rapport au film supérieur d'une gaine en matière plastique. La figure 2 est une vue en coupe transversale d'une gaine dont le film supérieur a été coupé par le dispositif selon l'invention.Figure 1 is a block diagram illustrating the positioning and action of the blade relative to the upper film of a plastic sheath. Figure 2 is a cross-sectional view of a sheath whose upper film has been cut by the device according to the invention.
La figure 3 est une vue en plan schématique illustrant la gaine coupée selon la figure 2.FIG. 3 is a schematic plan view illustrating the sheath cut according to FIG. 2.
La figure 4 est une vue à caractère schématique montrant les principaux agencements du dispositif de coupe selon l'invention.Figure 4 is a schematic view showing the main arrangements of the cutting device according to the invention.
Les figures 5, 6 et 7 sont des vues respectivement de face, de côté et en plan illustrant un exemple de réalisation du dispositif de coupe selon l'invention.Figures 5, 6 and 7 are respectively front, side and plan views illustrating an exemplary embodiment of the cutting device according to the invention.
Afin de rendre plus concret l'objet de l'invention, on le décrit maintenant sous des formes non limitatives de réalisation illustrées aux figures des dessins.In order to make the object of the invention more concrete, it is now described in nonlimiting embodiments illustrated in the figures of the drawings.
Comme indiqué auparavant, les sachets sont réalisés à partir d'un film en matière plastique du type polyéthylène ou autre qui est tout d'abord conformé pour constituer une gaine (G) de grande longueur avec un film supérieur (Gl) et un film inférieur (G2). Cette gaine peut être enroulée sur une bobine, dans le cas où l'ensachage et les soudures s'effectuent indépendamment de la formation de la gaine et de la réalisation de la découpe transversale du film supérieur (Gl) ou bien la gaine est conservée à plat et la découpe, l'ensachage et les soudures sont réalisées immédiatement en aval.As indicated above, the sachets are produced from a plastic film of the polyethylene or other type which is first of all shaped to constitute a sheath (G) of great length with an upper film (Gl) and a lower film (G2). This sheath can be wound on a reel, in the case where the bagging and the welds are carried out independently of the formation of the sheath and the achievement of the transverse cutting of the upper film (Gl) or else the sheath is kept at flat and cutting, bagging and welding are carried out immediately downstream.
Dans les deux cas, la gaine, de part et d'autre du dispositif de coupe selon l'invention, est mise en tension par tous moyens et est animée d'un mouvement d'avance déterminé en fonction des opérations de coupe et éventuellement de soudure à réaliser sur la gaine. Ce mouvement d'avance peut être obtenu par tous moyens connus du type moteur pas à pas ou autres.In both cases, the sheath on either side of the cutting according to the invention, is tensioned by all means and is driven by a feed movement determined according to the cutting operations and possibly welding to be performed on the sheath. This advance movement can be obtained by any known means of the stepping motor type or others.
Le dispositif de coupe proprement dit, objet de l'invention, est constitué par une lame (1) présentant au moins une arête tranchante. De manière avantageuse, on utilise une lame du type dénommée communément « cutter », c'est-à-dire de forme trapézoïdale avec deux arêtes de coupe opposées (la) et deux encoches (lb) ou orifices destinées à monter la lame d'un côté ou de l'autre sur l'axe (2a) d'un support (2), cela d'une manière pendulaire et selon un angle (α) constant par rapport à la gaine (G) dont elle doit couper le film supérieur (Gl) et lui seul.The actual cutting device, object of the invention, consists of a blade (1) having at least one cutting edge. Advantageously, a blade of the type commonly known as a “cutter” is used, that is to say of trapezoidal shape with two opposite cutting edges (la) and two notches (lb) or orifices intended to mount the blade. one side or the other on the axis (2a) of a support (2), this in a pendulum and at an angle (α) constant with respect to the sheath (G) of which it is to cut the film superior (Gl) and he alone.
Le support (2) est lui-même assujetti à un portique (3) monté à coulissement sur une traverse (4) disposée perpendiculairement au sens de défilement de la gaine dans le cas d'application illustré, étant entendu que, suivant les besoins, la lame et donc le support, le portique et la traverse pourraient être disposés différemment.The support (2) is itself subject to a gantry (3) slidably mounted on a crosspiece (4) arranged perpendicular to the direction of travel of the sheath in the case of application illustrated, it being understood that, as required, the blade and therefore the support, the gantry and the crosspiece could be arranged differently.
La lame (1) est équipée d'un moyen autorisant le contact permanent de son arête tranchante (la) sur le film supérieur (Gl) de la gaine pendant toute l'opération de coupe. Ce moyen peut être, comme illustré un contrepoids réglable (5) ou bien encore un ressort de rappel convenablement taré ou un électro-aimant.The blade (1) is equipped with a means allowing permanent contact of its cutting edge (la) on the upper film (Gl) of the sheath during the entire cutting operation. This means can be, as illustrated an adjustable counterweight (5) or even a suitably calibrated return spring or an electromagnet.
D'autre part, au-dessus de la lame (1) montée sur son support (2) est positionnée une butée (6) destinée à empêcher le rebond de la lame, et un organe (7) de réglage de la position de la lame relie le portique (3) et le support (2), comme on le voit à la Figure 5.On the other hand, above the blade (1) mounted on its support (2) is positioned a stop (6) intended to prevent the rebound of the blade, and a member (7) for adjusting the position of the blade connects the gantry (3) and the support (2), as seen in Figure 5.
En outre, les déplacements de la lame ( 1 ) sur la traverse sont obtenus et contrôlés par tous moyens tels que crémaillères et butées, l'avance de la lame étant commandée par tous organes mécaniques, pneumatiques, hydrauliques ou manuels.In addition, the movements of the blade (1) on the cross member are obtained and controlled by any means such as racks and stops, the blade advance being controlled by all mechanical, pneumatic, hydraulic or manual organs.
A noter encore qu'il est prévu de préférence sur la table (8) de déplacement de la gaine, une cavité (8a) au niveau de la lame pour faciliter la coupe et diminuer l'usure de l'arête tranchante.Note also that there is preferably provided on the sheath displacement table (8), a cavity (8a) at the level of the blade to facilitate cutting and reduce wear on the cutting edge.
Si la table ne présente pas de cavité, elle est alors réalisée en matière non abrasive du genre nylon ou similaire.If the table does not have a cavity, it is then made of non-abrasive material of the nylon or similar type.
Comme illustré aux schémas des figures 1 et 4, après descente ou basculement du support de lame, son arête tranchante (la) est en contact permanent sur le film supérieur (Gl) de la gaine et, lors de son déplacement, la lame refoule ledit film supérieur en formant un bourrelet (B), ce qui permet de couper (après réglage approprié) seulement le film supérieur même si celui-ci est très proche du film inférieur, voire même accolé à lui.As illustrated in the diagrams of Figures 1 and 4, after lowering or tilting of the blade support, its cutting edge (la) is in permanent contact on the upper film (Gl) of the sheath and, during its movement, the blade pushes said upper film by forming a bead (B), which makes it possible to cut (after appropriate adjustment) only the upper film even if it is very close to the lower film, or even attached to it.
Comme illustré aux figures 2 et 3, il est ainsi possible d'opérer la découpe du film supérieur sur une partie de la largeur de la gaine (distance D) en fonction du réglage des butées de déplacement et du relevage du support de lame, ce qui conserve au sachet ainsi réalisé une bonne résistance lors de l'ensachage et facilite ultérieurement la fermeture par soudure qui peut être réalisée en même temps que la soudure du fond du sachet ou indépendamment. As illustrated in FIGS. 2 and 3, it is thus possible to cut the upper film over part of the width of the sheath (distance D) as a function of the adjustment of the displacement stops and of the lifting of the blade support, this which keeps the sachet thus produced good resistance during bagging and subsequently facilitates sealing closure which can be carried out at the same time as the sealing of the bottom of the sachet or independently.

Claims

R E V E N D I C A T I O N SR E V E N D I C A T I O N S
-1- Dispositif de coupe pour la réalisation de sachets à partir d'une gaine (G) en matière plastique présentant un film supérieur (Gl) et un film inférieur (G2) caractérisé en ce qu'il est constitué d'une lame tranchante (1) articulée de manière pendulaire sur un support (2) et associée à un moyen (5) de maintien permanent et sous un angle (α) constant par rapport à la gaine (G) de sorte que ladite lame, sous l'effet du déplacement de la gaine, refoule le film supérieur pour former un bourrelet (B), la découpe s'effectuant au niveau dudit bourrelet par un déplacement transversal de la lame sur une partie de la largeur de la gaine.-1- Cutting device for making bags from a plastic sheath (G) having an upper film (Gl) and a lower film (G2) characterized in that it consists of a sharp blade (1) articulated pendulumly on a support (2) and associated with a means (5) for permanent holding and at a constant angle (α) relative to the sheath (G) so that said blade, under the effect displacement of the sheath, pushes the upper film to form a bead (B), the cutting being effected at the level of said bead by a transverse displacement of the blade over part of the width of the sheath.
-2- Dispositif de coupe selon la revendication 1, caractérisé en ce que le moyen de maintien permanent de la lame de coupe (1) en contact avec le film supérieur (Gl) de la gaine, est constitué par un contrepoids réglable (5)-2- Cutting device according to claim 1, characterized in that the permanent holding means of the cutting blade (1) in contact with the upper film (Gl) of the sheath, is constituted by an adjustable counterweight (5)
-3- Dispositif selon la revendication 1, caractérisé en ce que le moyen de maintien permanent de la lame de coupe (1) en contact avec le film supérieur (Gl) de la gaine, est constitué par un ressort de rappel convenablement taré.-3- Device according to claim 1, characterized in that the permanent holding means of the cutting blade (1) in contact with the upper film (Gl) of the sheath, is constituted by a return spring suitably tared.
-4- Dispositif de coupe selon la revendication 1 , caractérisé en ce que le moyen de maintien permanent de la lame de coupe (1) en contact avec le film supérieur (Gl) de la gaine, est constitué par un électroaimant.-4- Cutting device according to claim 1, characterized in that the permanent holding means of the cutting blade (1) in contact with the upper film (Gl) of the sheath, is constituted by an electromagnet.
-5- Dispositif de coupe selon la revendication 1, caractérisé en ce que la lame de coupe (1) est une lame à deux arêtes tranchantes opposées-5- Cutting device according to claim 1, characterized in that the cutting blade (1) is a blade with two opposite cutting edges
(l a) et à deux orifices (lb) d'articulation pendulaire sur le support (2) pour être montée de manière réversible. -6- Dispositif de coupe selon la revendication 1, caractérisé en ce que le support (2) de la lame (1) est assujetti à un portique (3) monté à coulissement contrôlé sur une traverse (4) disposée angulairement et de préférence perpendiculairement au sens de défilement de la gaine, ledit support (2) et ledit portique (3) étant agencés pour assurer les déplacements limités en hauteur et en translation de la lame par rapport à la gaine.(la) and two orifices (lb) of pendulum articulation on the support (2) to be mounted reversibly. -6- Cutting device according to claim 1, characterized in that the support (2) of the blade (1) is subject to a gantry (3) mounted with controlled sliding on a crosspiece (4) arranged angularly and preferably perpendicularly in the direction of travel of the sheath, said support (2) and said gantry (3) being arranged to ensure limited movement in height and in translation of the blade relative to the sheath.
-7- Dispositif selon la revendication 1, caractérisé en ce que sur le support (2), immédiatement au dessus de la lame de coupe (1) est positionnée une butée (6) destinée à empêcher le rebond de la lame.-7- Device according to claim 1, characterized in that on the support (2), immediately above the cutting blade (1) is positioned a stop (6) intended to prevent rebound of the blade.
-8- Dispositif selon la revendication 6, caractérisé en ce qu'un organe (7) de réglage de position de la lame est interposé entre le portique (3) et le support (2).-8- Device according to claim 6, characterized in that a member (7) for adjusting the position of the blade is interposed between the gantry (3) and the support (2).
-9- Dispositif selon la revendication 1 , caractérisé en ce que la gaine (G) est animée d'un mouvement d'avance programmé en fonction des opérations à effectuer et défile sous tension de part et d'autre du dispositif de coupe, au-dessus d'une table (8) réalisée de préférence en matériau non abrasif.-9- Device according to claim 1, characterized in that the sheath (G) is driven by a programmed advance movement according to the operations to be performed and scrolls under tension on either side of the cutting device, at above a table (8) preferably made of non-abrasive material.
-10 Dispositif selon la revendication 9, caractérisé en ce que la table (8) présente au niveau du dispositif de coupe une cavité (8) facilitant la coupe et diminuant l'usure de l'arête tranchante. -10 Device according to claim 9, characterized in that the table (8) has at the cutting device a cavity (8) facilitating cutting and reducing the wear of the cutting edge.
PCT/FR1998/000346 1997-02-20 1998-02-20 Device for precision cutting of thin sheet material WO1998036882A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP98910809A EP0963282B1 (en) 1997-02-20 1998-02-20 Device for precision cutting of thin sheet material
DE69803042T DE69803042D1 (en) 1997-02-20 1998-02-20 METHOD AND DEVICE FOR FINE CUTTING THIN LEAF
AU65049/98A AU6504998A (en) 1997-02-20 1998-02-20 Device for precision cutting of thin sheet material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR97/02267 1997-02-20
FR9702267A FR2759620B1 (en) 1997-02-20 1997-02-20 DEVICE FOR PRECISE CUTTING THIN SHEET MATERIAL

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WO1998036882A1 true WO1998036882A1 (en) 1998-08-27

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PCT/FR1998/000346 WO1998036882A1 (en) 1997-02-20 1998-02-20 Device for precision cutting of thin sheet material

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EP (1) EP0963282B1 (en)
AU (1) AU6504998A (en)
DE (1) DE69803042D1 (en)
FR (1) FR2759620B1 (en)
WO (1) WO1998036882A1 (en)

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Publication number Priority date Publication date Assignee Title
NL2010736C2 (en) * 2013-05-01 2014-11-04 Paul Norbert Manig COMBINATION OF A JOB OF BUILDING MATERIAL AND A DEVICE FOR CUTTING A FRESH OIL.

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GB604494A (en) * 1945-12-07 1948-07-05 Harold George Ruddick Improvements in, or relating to, cutting machines
GB650225A (en) * 1948-05-01 1951-02-21 William Henry Storey Improvements in or relating to apparatus for cutting sheet material
FR2376734A1 (en) * 1977-01-11 1978-08-04 Newell Co Inc SHEET FOR WINDOW BLIND
FR2647386A1 (en) * 1989-03-22 1990-11-30 Isermatic France Sa Device for marking out and partially cutting through the thickness of a protected adhesive multi-layer complex and machine making use thereof
EP0426229A1 (en) * 1989-11-02 1991-05-08 Audion Elektro B.V. Apparatus for opening one layer of a tube-like material web
DE9200561U1 (en) * 1992-01-18 1992-03-12 Maschinenfabrik Goebel Gmbh, 6100 Darmstadt, De
EP0515049A1 (en) * 1991-05-02 1992-11-25 Gerber Scientific Products, Inc. Cutting cloth web having mounted backing material and related method
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GB604494A (en) * 1945-12-07 1948-07-05 Harold George Ruddick Improvements in, or relating to, cutting machines
GB650225A (en) * 1948-05-01 1951-02-21 William Henry Storey Improvements in or relating to apparatus for cutting sheet material
FR2376734A1 (en) * 1977-01-11 1978-08-04 Newell Co Inc SHEET FOR WINDOW BLIND
FR2647386A1 (en) * 1989-03-22 1990-11-30 Isermatic France Sa Device for marking out and partially cutting through the thickness of a protected adhesive multi-layer complex and machine making use thereof
EP0426229A1 (en) * 1989-11-02 1991-05-08 Audion Elektro B.V. Apparatus for opening one layer of a tube-like material web
US5202065A (en) * 1991-04-11 1993-04-13 Baxter International Inc. Ultrasonic method of producing a score in a thermoplastic film pouch
EP0515049A1 (en) * 1991-05-02 1992-11-25 Gerber Scientific Products, Inc. Cutting cloth web having mounted backing material and related method
DE9200561U1 (en) * 1992-01-18 1992-03-12 Maschinenfabrik Goebel Gmbh, 6100 Darmstadt, De

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Also Published As

Publication number Publication date
FR2759620A1 (en) 1998-08-21
FR2759620B1 (en) 1999-05-07
AU6504998A (en) 1998-09-09
DE69803042D1 (en) 2002-01-31
EP0963282A1 (en) 1999-12-15
EP0963282B1 (en) 2001-12-19

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