EP1060850B1 - Method and apparatus for cutting and/or scoring flat adjacent elements - Google Patents

Method and apparatus for cutting and/or scoring flat adjacent elements Download PDF

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Publication number
EP1060850B1
EP1060850B1 EP00108633A EP00108633A EP1060850B1 EP 1060850 B1 EP1060850 B1 EP 1060850B1 EP 00108633 A EP00108633 A EP 00108633A EP 00108633 A EP00108633 A EP 00108633A EP 1060850 B1 EP1060850 B1 EP 1060850B1
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EP
European Patent Office
Prior art keywords
cutting
scoring
strip
segments
strip material
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EP00108633A
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German (de)
French (fr)
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EP1060850A3 (en
EP1060850A2 (en
Inventor
Edouard Borel
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Bobst Mex SA
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Bobst SA
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Classifications

    • 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
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/0003—Shaping by bending, folding, twisting, straightening, flattening or rim-rolling; Shaping by bending, folding or rim-rolling combined with joining; Apparatus therefor
    • B31F1/0006—Bending or folding; Folding edges combined with joining; Reinforcing edges during the folding thereof
    • B31F1/0009—Bending or folding; Folding edges combined with joining; Reinforcing edges during the folding thereof of plates, sheets or webs
    • B31F1/0019—Bending or folding; Folding edges combined with joining; Reinforcing edges during the folding thereof of plates, sheets or webs the plates, sheets or webs moving continuously
    • B31F1/0022—Bending or folding; Folding edges combined with joining; Reinforcing edges during the folding thereof of plates, sheets or webs the plates, sheets or webs moving continuously combined with making folding lines
    • B31F1/0025—Making the folding lines using rotary tools
    • 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
    • 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
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/14—Cutting, e.g. perforating, punching, slitting or trimming
    • 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
    • B31B2120/00—Construction of rigid or semi-rigid containers
    • B31B2120/30—Construction of rigid or semi-rigid containers collapsible; temporarily collapsed during manufacturing
    • 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
    • Y10T83/02—Other than completely through work thickness
    • Y10T83/0333—Scoring
    • Y10T83/0385—Rotary scoring blade
    • 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
    • Y10T83/0515—During movement of work past flying cutter
    • 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
    • Y10T83/06—Blanking

Definitions

  • the present invention relates first of all to a cutting / pressing method as defined in the preamble of claim 1. This invention also relates to a device for implementing this method as defined in the preamble of claim 5.
  • Cutting or extruding strip material between two rolls causes an impact of the cutting or creasing net which generates a substantially vertical vibration which causes very small changes in the geometry around the cutting net.
  • These changes in the space between the cutting net and the adjacent cylinder although of the order of only a few ⁇ m, are sufficient to affect the quality of the cut by leaving a certain proportion of uncut fibers.
  • the document US-3,835,746 describes an assembly for a rotary cut.
  • the assembly comprises a support element, at least one section of cutting net mounted directly on the support element, the cutting net being arranged in a predetermined pattern, rigid mounting means fixed to the support element at least partially around of the pattern and engaging one side of the cutting net, and spring mounting means attached to the support member opposite the rigid mounting means.
  • the document US- 3,977,283 discloses a rotary tool for cutting openings in a continuous strip.
  • the tool comprises a cutting form having a continuous blade projecting with two parallel lateral edges, and two parallel front and rear edges.
  • the shape to be cut has a longitudinal axis parallel to the front edges and back of the blade.
  • the front and rear edges extend at oblique angles with respect to the lateral edges.
  • the front and rear edges are arranged perpendicular to the longitudinal axis of the continuous strip.
  • the document US- 4,630,514 discloses a rotary cutting tool comprising two cylinders rotating in opposite directions on two parallel axes perpendicular to the insertion direction of the strip.
  • the cylinders each have a spiral blade on their periphery, so that the band is cut by engagement of the blades.
  • the blades are shaped so that the projection of the point of engagement of the blades on the plane including the axes of the cylinders moves linearly with the rotation of the drums and the trajectory of this projection is parallel to the axes of the cylinders.
  • the purpose of the present invention is to reduce the importance of these impacts in order to reduce the consequences in terms of cutting quality and noise.
  • this invention relates to a cutting / up-molding method as defined in claim 1.
  • the figure 1 shows a segment of a strip 1 of a material to be cut, in particular a strip of cardboard for making folding boxes obtained by cutting the periphery of the box and creasing at the points of the fold lines.
  • This strip is intended to run between two cutting rolls and / or grooving R 1 , R 2 of a rotary cutter of known type in the direction of the axis 2.
  • the cylinder R 1 is shown with a transverse cutting net F.
  • each element 3a-3n. 4a-4n, 5a-5n of the three rows is represented symbolically by a simple rectangle. It is obvious that the actual shape of these elements is generally substantially more complex, each box being formed of several panels separated by fold lines, however this form does not matter for the understanding of the principle of the invention. It is sufficient to know that the elements of the rows 3, 4 and 5 have straight cutting edges 3 ', 4', respectively 5 'which extend in a direction substantially transverse to the axis of travel 2 of the strip 1 in which they are cut out.
  • the adjacent cutting edges 3 ', 4' and 5 ' are offset in the longitudinal direction of the strip 1 by a distance k, so as not to coincide with the generatrices of the rolls R 1 , R 2 over the entire width
  • This shifted disposition of the cutting lines 3 ', 4' and 5 ' makes it possible to reduce the importance of each impact of the cutting threads F by shifting them relative to one another.
  • the value of the distance k between two adjacent cutting lines 3 ', 4' or 4 ', 5' can be very small. Even a shift of the order of a millimeter for example is already effective.
  • the three homologous transverse cutting edges 3 ', 4' and 5 'of the adjacent elements 3a-3n, 4a-4n, 5a-5n of the three rows 3, 4 and 5 have their respective ends aligned along two perpendiculars P 1 , P 2 to the scroll axis of the strip 1, each cutting edge forming the same angle ⁇ with these perpendiculars P 1 , P 2 .
  • This arrangement of the elements 3a-3n, 4a-4n, 5a-5n produces triangular drops 6 along the two edges of the band 1 as well as rectangular drops 7 inside this band 1.
  • the first variant did not produce any drops either at the edges or inside the band 1.
  • the second variant produces very small drops.
  • a same cross-sectional line 3 ', 4', 5 ' serves to separate two adjacent elements so that no drop is produced between the adjacent elements.
  • the figure 4 shows one of the possible arrangements, without inclination of the transverse cutting lines 3 ', 4', 5 '. It is obvious that provisions of this type can vary almost infinitely depending on the shape of the elements 3a-3n, 4a-4n, 5a-5n which, as we have said, is actually more complex than the simple rectangular shape representing these elements schematically. It is thus possible to combine cut elements with a single cutting edge and double cutting parallel edges. between them falls 8 with parallel edges, as shown in this figure 4 . The only condition to be fulfilled in this form of implementation is to avoid having a cutting line crossing the entire width of the strip 1.
  • the figure 5 shows the cutting cylinder R 1 relating to the first embodiment illustrated by the figure 2 .
  • the arrangement of the cutting nets F 1 , F 2 , F 3 obviously corresponds to that of the transverse cutting lines 3 ', 4' and 5 'formed on the strip material 1.
  • each thread F 1 , F 2 , F 3 is offset by a value k with respect to the corresponding generatrix of the cutting cylinder R 1 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forests & Forestry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Making Paper Articles (AREA)
  • Accessories And Tools For Shearing Machines (AREA)
  • Sawing (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Metal Rolling (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)

Abstract

Procedure consists of passing material strip (1) between two cutting cylinders of rotating cutter to obtain rows of adjacent elements (3a-5n) having cutting edge/pushing back line (3'-5') which extends from one end to other of strip. Offset (k) in direction of movement of strip is created along respective cutting edge/pushing back line so it does not coincide with any generating line of cylinders. An Independent claim is also included for an apparatus to produce the adjacent elements following the procedure.

Description

La présente invention se rapporte tout d'abord à un procédé de découpage/refoulage tel que defini dans le preambule de le revendication 1. Cette invention a également pour objet un dispositif pour la mise en oeuvre de ce procédé tel que défini dans le préambule de la revendication 5.The present invention relates first of all to a cutting / pressing method as defined in the preamble of claim 1. This invention also relates to a device for implementing this method as defined in the preamble of claim 5.

Le découpage ou le refoulage de matériau en bande entre deux cylindres provoque un impact du filet de coupe ou de refoulage qui génère une vibration essentiellement verticale qui provoque de très faibles modifications de la géométrie autour du filet de coupe. Ces modifications de l'espace entre le filet de coupe et le cylindre adjacent, bien que de l'ordre de quelques µm seulement sont suffisantes pour affecter la qualité de la coupe en laissant une certaine proportion de fibres non coupées. Plus la longueur du filet de coupe dans la direction des génératrices des cylindres de découpage est grande, plus l'impact est élevé et il devient maximum lorsque le filet de coupe traverse toute la largeur du matériau en bande, ce qui est très fréquent.Cutting or extruding strip material between two rolls causes an impact of the cutting or creasing net which generates a substantially vertical vibration which causes very small changes in the geometry around the cutting net. These changes in the space between the cutting net and the adjacent cylinder, although of the order of only a few μm, are sufficient to affect the quality of the cut by leaving a certain proportion of uncut fibers. The greater the cutting net length in the direction of the generators of the cutting rolls, the greater the impact and it becomes maximum when the cutting net crosses the entire width of the strip material, which is very common.

Ces impacts de coupe constituent également une importante source de bruit et se répètent à une fréquence élevée.These cutting impacts are also an important source of noise and are repeated at a high frequency.

Le document US- 3.835.746 décrit un ensemble pour une découpe rotative. L'ensemble comprend un élément support, au moins une section de filet de découpe montée directement sur l'élément support, le filet de découpe étant agencé selon un motif déterminé, des moyens de montage rigides fixés à l'élément support au moins partiellement autour du motif et venant en prise avec un côté du filet de découpe, et des moyens de montage à ressort fixés à l'élément support à l'opposé des moyens de montage rigides.The document US-3,835,746 describes an assembly for a rotary cut. The assembly comprises a support element, at least one section of cutting net mounted directly on the support element, the cutting net being arranged in a predetermined pattern, rigid mounting means fixed to the support element at least partially around of the pattern and engaging one side of the cutting net, and spring mounting means attached to the support member opposite the rigid mounting means.

Le document US- 3.977.283 décrit un outil rotatif pour la découpe d'ouvertures dans une bande continue. L'outil comprend une forme à découper présentant une lame continue en saillie avec deux arêtes latérales parallèles, et deux arêtes avant et arrière parallèles. La forme à découper possède un axe longitudinal parallèle aux arêtes avant et arrière de la lame. Les arêtes avant et arrière s'étendent à angles obliques par rapport aux arêtes latérales. Les arêtes avant et arrière sont agencées perpendiculairement à l'axe longitudinal de la bande continue.The document US- 3,977,283 discloses a rotary tool for cutting openings in a continuous strip. The tool comprises a cutting form having a continuous blade projecting with two parallel lateral edges, and two parallel front and rear edges. The shape to be cut has a longitudinal axis parallel to the front edges and back of the blade. The front and rear edges extend at oblique angles with respect to the lateral edges. The front and rear edges are arranged perpendicular to the longitudinal axis of the continuous strip.

Le document US- 4.630.514 décrit un outil rotatif de découpe comprenant deux cylindres tournant en sens inverse sur deux axes parallèles perpendiculaires à la direction d'introduction de la bande. Les cylindre possèdent chacun une lame en spirale sur leur périphérie, de sorte que la bande est coupée par engagement des lames. Les lames sont conformées de façon à ce que la projection du point d'engagement des lames sur le plan incluant les axes des cylindres se déplace linéairement avec la rotation des tambours et la trajectoire de cette projection est parallèle aux axes des cylindres.The document US- 4,630,514 discloses a rotary cutting tool comprising two cylinders rotating in opposite directions on two parallel axes perpendicular to the insertion direction of the strip. The cylinders each have a spiral blade on their periphery, so that the band is cut by engagement of the blades. The blades are shaped so that the projection of the point of engagement of the blades on the plane including the axes of the cylinders moves linearly with the rotation of the drums and the trajectory of this projection is parallel to the axes of the cylinders.

Le but de la présente invention est de réduire l'importance de ces impacts afin de diminuer les conséquences au niveau de la qualité de coupe et du bruit.The purpose of the present invention is to reduce the importance of these impacts in order to reduce the consequences in terms of cutting quality and noise.

A cet effet, cette invention a pour objet un procédé de découpage/refoulage tel que defini dans la revendication 1.For this purpose, this invention relates to a cutting / up-molding method as defined in claim 1.

Elle a également pour objet un dispositif pour la mise en oeuvre de ce procédé tel que defini dans la revendication 5.It also relates to a device for implementing this method as defined in claim 5.

Il suffit de très petits décalages entre les bords transversaux adjacents ou d'angles très faibles avec les génératrices des cylindres de coupe pour obtenir une très sensible diminution des effets d'impacts. Il s'agit donc là d'une mesure d'ordre opératoire très simple à mettre en oeuvre, mais permettant d'apporter une amélioration sensible aux problèmes susmentionnés.Just very small offsets between the adjacent transverse edges or very small angles with the generatrices of the cutting cylinders to obtain a very significant reduction of impact effects. This is where an operational measure that is very simple to implement, but makes it possible to make a significant improvement to the aforementioned problems.

L'invention sera mieux comprise à la lecture de la description qui suit et à l'aide des dessins annexés qui illustrent, très schématiquement et à titre d'exemple, différents modes de mise en oeuvre du procédé de découpage/refoulage objet de la présente invention.

  • La figure 1 est une vue en élévation de profil d'une découpeuse rotative;
  • les figures 2 à 4 sont des vues en plan de quatre segments de matériau en bande à découper et/ou refouler sur lesquels sont illustrés différentes dispositions des éléments plats à découper;
  • la figure 5 est une vue en élévation de face de la surface d'un cylindre de découpage pour la mise en oeuvre du procédé objet de l'invention.
The invention will be better understood on reading the description which follows and with the aid of the accompanying drawings which illustrate, very schematically and by way of example, various embodiments of the cutting / pressing process which is the subject of the present invention. invention.
  • The figure 1 is a side elevational view of a rotary cutter;
  • the Figures 2 to 4 are plan views of four segments of strip material to be cut and / or discharged on which are illustrated various arrangements of flat elements to be cut;
  • the figure 5 is a front elevational view of the surface of a cutting cylinder for carrying out the method which is the subject of the invention.

La figure 1 montre un segment d'une bande 1 d'un matériau à découper, notamment une bande de carton pour la confection de boîtes pliantes obtenues par découpage du pourtour de la boîte et refoulage aux endroits des lignes de pliage. Cette bande est destinée à défiler entre deux cylindres de découpage et/ou de rainurage R1, R2 d'une découpeuse rotative de type connue dans la direction de l'axe 2. Le cylindre R1 est représenté avec un filet de découpage transversal F.The figure 1 shows a segment of a strip 1 of a material to be cut, in particular a strip of cardboard for making folding boxes obtained by cutting the periphery of the box and creasing at the points of the fold lines. This strip is intended to run between two cutting rolls and / or grooving R 1 , R 2 of a rotary cutter of known type in the direction of the axis 2. The cylinder R 1 is shown with a transverse cutting net F.

Dans cet exemple, trois rangées d'éléments plats 3, 4, respectivement 5 sont disposées parallèlement à l'axe de défilement 2 (figure 2 ). Chaque élément 3a-3n. 4a-4n, 5a-5n des trois rangées est représenté symboliquement par un simple rectangle. Il est évident que la forme réelle de ces éléments est généralement sensiblement plus complexe, chaque boîte étant formée de plusieurs panneaux séparés par des lignes de pliage, toutefois cette forme n'a pas d'importance pour la compréhension du principe de l'invention. Il suffit de savoir que les éléments des rangées 3, 4 et 5 présentent des bords de coupe droits 3', 4', respectivement 5' qui s'étendent dans une direction sensiblement transversale à l'axe de défilement 2 de la bande 1 dans laquelle ils sont découpés.In this example, three rows of flat elements 3, 4 and 5 are arranged parallel to the scroll axis 2 ( figure 2 ). Each element 3a-3n. 4a-4n, 5a-5n of the three rows is represented symbolically by a simple rectangle. It is obvious that the actual shape of these elements is generally substantially more complex, each box being formed of several panels separated by fold lines, however this form does not matter for the understanding of the principle of the invention. It is sufficient to know that the elements of the rows 3, 4 and 5 have straight cutting edges 3 ', 4', respectively 5 'which extend in a direction substantially transverse to the axis of travel 2 of the strip 1 in which they are cut out.

Lorsque les bords de coupe adjacents 3',4' et 5' sont alignés et s'étendent perpendiculairement, d'un bord à l'autre de la bande 1 de matériau à découper, ils coïncident avec les génératrices des cylindres R1, R2.When the adjacent cutting edges 3 ', 4' and 5 'are aligned and extend perpendicularly from one edge to the other of the strip 1 of material to be cut, they coincide with the generatrices of the rolls R 1 , R 2 .

Selon le procédé objet de la présente invention et comme illustré par la figure 2, les bords de coupe adjacents 3', 4' et 5' sont décalés dans le sens longitudinal de la bande 1 d'une distance k, de manière à ne pas coïncider avec les génératrices des cylindres R1, R2 sur toute la largeur de la bande 1. Cette disposition décalée des lignes de coupe 3', 4' et 5' permet de réduire l'importance de chaque impact des filets de coupe F en les déphasant l'un par rapport à l'autre. La valeur de la distance k entre deux lignes de coupe adjacentes 3', 4' ou 4', 5' peut être très faible. Même un décalage de l'ordre du millimètre par exemple est déjà efficace.According to the method which is the subject of the present invention and as illustrated by the figure 2 , the adjacent cutting edges 3 ', 4' and 5 'are offset in the longitudinal direction of the strip 1 by a distance k, so as not to coincide with the generatrices of the rolls R 1 , R 2 over the entire width This shifted disposition of the cutting lines 3 ', 4' and 5 'makes it possible to reduce the importance of each impact of the cutting threads F by shifting them relative to one another. The value of the distance k between two adjacent cutting lines 3 ', 4' or 4 ', 5' can be very small. Even a shift of the order of a millimeter for example is already effective.

Dans une seconde variante illustrée par la figure 3, les trois bords de coupe transversaux homologues 3', 4' et 5' des éléments adjacents 3a-3n, 4a-4n, 5a-5n des trois rangées 3, 4 et 5 ont leurs extrémités respectives alignées selon deux perpendiculaires P1, P2 à l'axe de défilement de la bande 1, chaque bord de coupe formant un même angle α avec ces perpendiculaires P1, P2. Cette disposition des éléments 3a-3n, 4a-4n, 5a-5n produit des chutes triangulaires 6 le long des deux bords de la bande 1 ainsi que des chutes rectangulaires 7 à l'intérieur de cette bande 1.In a second variant illustrated by the figure 3 , the three homologous transverse cutting edges 3 ', 4' and 5 'of the adjacent elements 3a-3n, 4a-4n, 5a-5n of the three rows 3, 4 and 5 have their respective ends aligned along two perpendiculars P 1 , P 2 to the scroll axis of the strip 1, each cutting edge forming the same angle α with these perpendiculars P 1 , P 2 . This arrangement of the elements 3a-3n, 4a-4n, 5a-5n produces triangular drops 6 along the two edges of the band 1 as well as rectangular drops 7 inside this band 1.

La première variante ne produisait aucune chute ni sur les bords ni à l'intérieur de la bande 1. La seconde variante produit de très petites chutes. Dans toutes ces variantes une même ligne de coupe transversale 3', 4', 5' sert à séparer deux éléments adjacents de sorte que l'on ne produit pas de chute entre les éléments adjacents.The first variant did not produce any drops either at the edges or inside the band 1. The second variant produces very small drops. In all these variants a same cross-sectional line 3 ', 4', 5 'serves to separate two adjacent elements so that no drop is produced between the adjacent elements.

Suivant le type d'élément à découper, c'est-à-dire suivant le type de boîte et pour autant que l'on admette un certain pourcentage de chutes entre les bords de coupe transversaux, c'est-à-dire que l'on pratique une double coupe, il est possible de concevoir de nombreuses répartitions avec ou sans inclinaisons des lignes de coupes transversales.According to the type of element to be cut, that is to say according to the type of box and provided that a certain percentage of falls is allowed between the transverse cutting edges, that is to say that We practice a double cut, it is possible to design many distributions with or without inclinations of the cross-section lines.

La figure 4 montre l'une des dispositions possibles, sans inclinaison des lignes de coupe transversales 3', 4', 5'. Il est évident que les dispositions de ce type peuvent varier pratiquement à l'infini en fonction de la forme des éléments 3a-3n, 4a-4n, 5a-5n qui, comme nous l'avons dit, est en réalité plus complexe que la simple forme rectangulaire représentant ces éléments de façon schématique. C'est ainsi que l'on peut associer des éléments découpés avec un bord de coupe à simple coupe et les bords parallèles à double coupe ménageant entre eux des chutes 8 à bords parallèles, comme illustré sur cette figure 4. La seule condition à remplir dans cette forme de mise en oeuvre, est d'éviter d'avoir une ligne de coupe traversant toute la largeur de la bande 1.The figure 4 shows one of the possible arrangements, without inclination of the transverse cutting lines 3 ', 4', 5 '. It is obvious that provisions of this type can vary almost infinitely depending on the shape of the elements 3a-3n, 4a-4n, 5a-5n which, as we have said, is actually more complex than the simple rectangular shape representing these elements schematically. It is thus possible to combine cut elements with a single cutting edge and double cutting parallel edges. between them falls 8 with parallel edges, as shown in this figure 4 . The only condition to be fulfilled in this form of implementation is to avoid having a cutting line crossing the entire width of the strip 1.

Bien que l'on n'ait parlé, dans les exemples qui précèdent, que des lignes de coupes, la même chose peut être appliquée pour les lignes de refoulage qui servent au pliage des différents panneaux et rabats formant les boîtes pliantes.Although in the foregoing examples only cut lines have been mentioned, the same can be applied to the crease lines used for folding the various panels and flaps forming the folding boxes.

Dans le cas où les éléments découpés 3a-3n, 4a-4n, 5a-5n sont inclinés par rapport à l'axe de défilement 2 de la bande 1, comme dans la variante de la figure 3, il est évident que l'impression pratiquée sur ces éléments présentera la même inclinaison afin qu'elle soit alignée sur les bords des panneaux de la boîte.In the case where the cut elements 3a-3n, 4a-4n, 5a-5n are inclined with respect to the scroll axis 2 of the strip 1, as in the variant of FIG. figure 3 it is obvious that the impression made on these elements will have the same inclination so that it is aligned with the edges of the panels of the box.

La figure 5 montre le cylindre de découpage R1 relatif au premier mode de mise en oeuvre illustré par la figure 2. La disposition des filets de découpage F1, F2, F3 correspond évidemment à celle des lignes de coupe transversales 3', 4' et 5' formées sur le matériau en bande 1. C'est ainsi que dans cette forme d'exécution, chaque filet F1, F2, F3 est décalé d'une valeur k par rapport à la génératrice correspondante du cylindre de découpage R1.The figure 5 shows the cutting cylinder R 1 relating to the first embodiment illustrated by the figure 2 . The arrangement of the cutting nets F 1 , F 2 , F 3 obviously corresponds to that of the transverse cutting lines 3 ', 4' and 5 'formed on the strip material 1. Thus, in this embodiment each thread F 1 , F 2 , F 3 is offset by a value k with respect to the corresponding generatrix of the cutting cylinder R 1 .

Claims (5)

  1. A cutting/scoring method for at least two rows (3, 4, 5) side by side of adjacent flat elements (3a-3n, 4a-4n, 5a-5n) in a material in strip form (1), of which at least one cutting edge or scoring line, transversely to said strip material (1), comprises segments (3'- 5') and extends from one edge of said strip material (1) to the other, consisting in passing said strip material (1) between two cutting/scoring cylinders (R1, R2) of a rotary cutting machine, characterised in that there is created along said cutting edge, respectively said scoring line, at least one offset (k) in the direction of transit of said strip material (1) between the said segments (3'- 5') of the two side by side elements (3a, 4a, 5a), so that said cutting edge or said scoring line respectively does not coincide with the generatrix of said cylinders (R1, R2); the two segments (3'- 5') are remaining parallel to one another but not aligned.
  2. A method according to claim 1, characterised in that the said segments (3'- 5') form an acute angle (α) with a perpendicular (P) to the direction of transit (2) of said strip material (1) between said cylinders (R1, R2).
  3. A method according to claim 2, characterised in that the two ends of said respective segments (3'- 5') are situated on two respective straight lines (P1, P2) perpendicular to the direction of transit (2) of said strip material (1).
  4. A method according to claim 1, characterised in that wastes (8) are created between at least a part of said adjacent segments (3'- 5') of two adjacent flat elements (3a-3b, 4a-4b, 5a-5b) of a same row (3, 4, 5).
  5. A device for performing the method according to one of the preceding claims, characterised in that it comprises at least one cutting and/or scoring cylinder (R1), the cutting and/or scoring rules (F1, F2, F3), of which extending in the longitudinal direction of said cutting cylinder (R1) have at least one offset (k) with respect to the corresponding generatrix of said cutting cylinder (R1).
EP00108633A 1999-06-18 2000-04-20 Method and apparatus for cutting and/or scoring flat adjacent elements Expired - Lifetime EP1060850B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH114299 1999-06-18
CH01142/99A CH693263A5 (en) 1999-06-18 1999-06-18 The process of cutting / creasing of platsadjacents elements and device for its implementation.

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EP1060850A2 EP1060850A2 (en) 2000-12-20
EP1060850A3 EP1060850A3 (en) 2004-01-07
EP1060850B1 true EP1060850B1 (en) 2009-04-01

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EP (1) EP1060850B1 (en)
JP (2) JP2001018195A (en)
KR (1) KR100374676B1 (en)
CN (1) CN1201906C (en)
AT (1) ATE427194T1 (en)
AU (1) AU772091B2 (en)
BR (1) BR0002692A (en)
CA (1) CA2308611C (en)
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JP2001018195A (en) 2001-01-23
KR20010049372A (en) 2001-06-15
TW477737B (en) 2002-03-01
CA2308611A1 (en) 2000-12-18
JP3103981U (en) 2004-08-26
KR100374676B1 (en) 2003-03-04
AU4084600A (en) 2000-12-21
EP1060850A3 (en) 2004-01-07
CN1201906C (en) 2005-05-18
DE60041900D1 (en) 2009-05-14
ATE427194T1 (en) 2009-04-15
EP1060850A2 (en) 2000-12-20
BR0002692A (en) 2001-01-30
US6412378B1 (en) 2002-07-02
CA2308611C (en) 2004-08-10
CN1277910A (en) 2000-12-27
AU772091B2 (en) 2004-04-08
CH693263A5 (en) 2003-05-15

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