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EP3218179B1 - Methods for manufacturing a female embossing tool, embossing tools, embossing module and method, machine equipped with said tools - Google Patents

Methods for manufacturing a female embossing tool, embossing tools, embossing module and method, machine equipped with said tools Download PDF

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Publication number
EP3218179B1
EP3218179B1 EP15797859.4A EP15797859A EP3218179B1 EP 3218179 B1 EP3218179 B1 EP 3218179B1 EP 15797859 A EP15797859 A EP 15797859A EP 3218179 B1 EP3218179 B1 EP 3218179B1
Authority
EP
European Patent Office
Prior art keywords
embossing
tool
female
embossing tool
male
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.)
Active
Application number
EP15797859.4A
Other languages
German (de)
French (fr)
Other versions
EP3218179A1 (en
Inventor
Francesco PESSOTTO
Roberto Valterio
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.)
Bobst Mex SA
Original Assignee
Bobst Mex SA
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 Bobst Mex SA filed Critical Bobst Mex SA
Priority to PL15797859T priority Critical patent/PL3218179T3/en
Publication of EP3218179A1 publication Critical patent/EP3218179A1/en
Application granted granted Critical
Publication of EP3218179B1 publication Critical patent/EP3218179B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B31F1/07—Embossing, i.e. producing impressions formed by locally deep-drawing, e.g. using rolls provided with complementary profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/005—Rolls with a roughened or textured surface; Methods for making same
    • 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
    • B31B50/59—Shaping sheet material under pressure
    • 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
    • B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
    • B31D5/00—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles
    • B31D5/0039—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles for making dunnage or cushion pads
    • B31D5/006—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles for making dunnage or cushion pads including controlled deformation of flat material, e.g. pleating, corrugating or embossing
    • 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
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0702—Embossing by tools working discontinuously
    • 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
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0717—Methods and means for forming the embossments
    • 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
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0723—Characteristics of the rollers
    • B31F2201/0728—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
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0723—Characteristics of the rollers
    • B31F2201/0738—Cross sectional profile of the embossments
    • 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
    • B31F2201/00—Mechanical deformation of paper or cardboard without removing material
    • B31F2201/07—Embossing
    • B31F2201/0707—Embossing by tools working continuously
    • B31F2201/0715—The tools being rollers
    • B31F2201/0741—Roller cooperating with a non-even counter roller
    • B31F2201/0743—Roller cooperating with a non-even counter roller having a matching profile
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49544—Roller making
    • Y10T29/4956—Fabricating and shaping roller work contacting surface element
    • Y10T29/49561—Fabricating and shaping roller work contacting surface element toothed roller

Definitions

  • the present invention relates to a method of producing a female embossing tool.
  • the invention relates to a female embossing tool.
  • the invention relates to a pair of embossing tools, comprising a male embossing tool and a female embossing tool.
  • the invention also relates to an embossing module for flat elements for forming packages, equipped with a female embossing tool.
  • a flat element processing machine for example a printing, cutting or folding-gluing machine, is used in the packaging industry, for example to print, cut or fold and glue flat elements, such as cardboard sheets. These printed sheets are then used to make cardboard boxes.
  • machines of the platen press type perform cutting and embossing
  • machines called folder-gluers perform the folding and gluing of blanks or blanks of cartons, to form a package.
  • the embossing step makes it possible to give relief to the sheet of cardboard, for functional reasons and in particular to form pre-folding lines, or for purely aesthetic reasons.
  • the present invention relates to an embossing module provided with a pair of male and female embossing tools, including such a female embossing tool.
  • the invention relates to a method of embossing a carton blank using such a pair of embossing tools.
  • the document EP 0879197 presents an example of platen cutting and embossing machine.
  • the cutting and embossing tools are inserted into the machine and used to cut cardboard sheets.
  • the document WO 2014/135265 presents a machine with rotary embossing tools.
  • the embossing arrangement placed in an embossing cassette is equipped with an upper rotary embossing tool, positioned parallel to a lower rotary embossing tool.
  • a continuous strip of cardboard is embossed thanks to this cassette.
  • the document EP 1932657 discloses a device for embossing braille characters on cardboard blanks with rotary embossing tools.
  • the result of the embossing is a functional relief used for Braille messages on some packaging boxes, especially on the drug boxes and allow tactile reading of the messages.
  • the male and female embossing tools are manufactured, in particular by machining, with protuberances on the surface of the male tool and complementary recesses on the surface of the female tool. Consequently, if the manufacturer wishes to make small series, the cost of manufacturing each pair of tools does not allow to do it with a low cost for each package. Thus, for the manufacture of packaging for consumer goods, these embossing tools being made to measure, they are only affordable for large series, for example of the order of 50,000 to 200,000 boxes. minimum. Small series, in particular of the order or less than a thousand boxes are only possible for high value products, or in the field of luxury. In addition, the order of the tools must be passed well in advance, because of the time necessary to their realization.
  • the manufacturer seeks to obtain the best complementarity of shape between the protuberances on the surface of the male tool and the depressions on the surface of the female tool, and this in order to obtain a deformation of the material ideally without pinching, and without crushing too much reduction in the thickness of the carton, or at least with a minimum of these phenomena.
  • An object of the present invention is to provide a method of making a female embossing tool free from the limitations of known female embossing tools. Another object of the invention is to make the manufacture of packaging more flexible with different embossing arrangements, in order to be able to manufacture small or medium series of packaging. Another object of the invention is to provide a means for obtaining a female embossing tool adaptable to multiple male embossing tools to avoid making new complete tooling for each desired relief modification to the surface of the carton.
  • This method of implementation applies in particular during the first use of the female embossing tool or a female embossing tool already previously returned to an initial form of departure, with its peripheral face devoid of or hollow.
  • the embossing is defined, by way of non-exhaustive example, as any mechanical deformation operation of the flat element by crushing between a positive shape provided with one or more convexities or protuberances, ie the male tool, and a negative form, provided with one or more concavities or recesses, ie the female tool.
  • the embossing can thus be a conventional embossing, grooving, creasing, or others.
  • the material having shape memory properties is defined, by way of non-exhaustive example, as being a deformable material capable of passing from an initial form to a final form.
  • the material having shape memory properties also has the ability to recover its original starting shape if it is subjected to specific conditions depending on the type of material.
  • a flat element is defined, by way of non-exhaustive example, as a sheet, plate, continuous web material such as paper, cardboard, corrugated cardboard, laminated corrugated cardboard, flexible plastic, for example polyethylene (PE), polyethylene terephthalate (PET), bioriented polypropylene (BOPP), or other polymers, or other materials.
  • the flat support is defined, by way of non-exhaustive example, as being a sheet intended to form a cut, and then a packaging box after folding-gluing.
  • this process makes it possible to very quickly produce female tools, without increasing as significantly as today the cost price of each package compared to large series of the order of several hundred thousand dollars. packaging, for example.
  • This method of implementation applies in particular during the second use or a subsequent use of an embossing tool initially having a shape corresponding to a previous use, that is to say with a peripheral face provided with hollow.
  • the material is selected from shape memory metal alloys, and polymeric materials having shape memory properties.
  • the step of wearing the outer face of the female embossing tool in selected conditions, ie the transformation can be done by heating, UV irradiation, or others.
  • embossing embossing à la carte is performed on the flat element with the same female embossing tool, being able to vary in particular the arrangement, the shape, the length, the width, the depth of the lines or any other geometric shape of grooving or embossing.
  • the packaging manufacturer potentially has an unlimited series of possible hollows and therefore possible reliefs for the flat element.
  • the method of producing the female embossing tool is so simple and quick to implement that the overall cost of the pair of embossing tools is reduced by almost half and essentially covers only that of the embossing tool.
  • Male embossing tool both the same female embossing tool has become adaptable to many configurations.
  • the present invention also relates to a planar female embossing tool forming a tool for a platen press for embossing flat elements for forming packages, which comprises a plate with an outer layer made of a shape memory material.
  • the present invention relates to a rotary female embossing tool for embossing flat elements for forming packages, which comprises an outer strip made of a shape memory material or comprising with an outer layer made in a shape memory material.
  • the present invention also relates to a pair of embossing tools for a flat element, such as a cardboard blank, comprising a male embossing tool whose outer face is provided with protuberances corresponding to the embossing reliefs desired on the flat element after the embossing, and a female embossing tool such as one of those previously defined, shaped and dimension compatible with the male embossing tool.
  • the present invention also relates to an embossing module, which comprises a female embossing tool, or a pair of embossing tools.
  • a flat member processing machine for forming packages which includes a female embossing tool, or a pair of embossing, or an embossing module, such as one of those previously defined.
  • the machine is the type of folder-gluer, platen cutting press, printing machine and treatment of a continuous band, or others.
  • the Fig. 1 illustrates a folder-gluer illustrating a possible application of the invention.
  • the cardboard blanks arrive in the folder-gluer by the entry E and are recovered in the form of boxes folded at the exit S, being treated along the path of the cardboard blanks, whose direction of transport is indicated by an arrow F.
  • the folder-gluer successively comprises from the input E to the output S, a margin station 10, a breaking module 20, a module 30 which will be called “embossing module", a module 40 and a receiving station 50.
  • the function of the embossing module 30 is to mechanically print a relief on the cardboard blanks moving in the folder-gluer, by means of the pair of rotary tools 5 and 6.
  • Such relief shapes may constitute for example lines de crease for a future folding at these lines, or braille characters thus printed, or graphic elements in relief for decorative purposes.
  • the Fig. 2 illustrates an example of a pair of tools 5 and 6 according to the invention.
  • the tools 5 and 6 comprise a male rotary embossing tool 5 and a female rotary embossing tool 6.
  • the male tool 5 is constituted by a cylinder whose peripheral surface is dotted with pins (or protuberances) 41.
  • the female tool 6 is constituted by a cylinder whose peripheral surface is dotted with recesses (or depressions) 42.
  • the male embossing tool 5 is of shape and size compatible with the female embossing tool 6.
  • the pins 41 enter the the thickness of the cardboard to form braille characters.
  • the pins 41 and the recesses 42 are carried by a respective plate 43, 44 in the form of a strip wound on the respective cylindrical tool 5, 6 to form the outer face.
  • the plate 44 of the female tool 6 is made of shape memory material.
  • the material is chosen from metal alloys with shape memory, for example of the CuAlNi, CuZnAl and NiTi type, polymers having shape memory type properties, for example expanded PVCs or TPUs, and others.
  • the male tool 5 is always made by means of a metal plate 43, such as a strip or a solid steel plate machined to present on its surface the desired protruding relief, consisting of point protrusions, linear more or less extensive, continuous, discontinuous, etc.
  • a metal plate 43 such as a strip or a solid steel plate machined to present on its surface the desired protruding relief, consisting of point protrusions, linear more or less extensive, continuous, discontinuous, etc.
  • Figs. 3 to 10 illustrate the method of producing a first female embossing tool according to the invention, its use for embossing a cardboard blank and the method of producing a second female embossing tool having a different relief from the first female embossing tool.
  • a step consists in providing a first male embossing tool 5, whose plate 43 defines a first protrusion 41 (FIG. Fig. 3 ).
  • Another step is to provide a female embossing tool 6 according to the invention, the plate or outer layer 44 is made of shape memory material, and which is here in a non-distorted starting shape resulting in an outer face smooth.
  • the plate 43 is brought against the plate 44 (Arrow A1) by exerting a constraint so that the protrusion 41 enters the plate 44, and causes a deformation in the form of a depression on the surface and in a portion of the plate thickness 44.
  • This relative displacement between the plate 43 and the plate 44 is operated for example until the contact between the plate 43 and the plate 44 on either side of the protrusion 41.
  • a depression 42 is formed ( Figs. 4 and 5 ) on the surface of the female embossing tool 6 which is systematically and exactly of complementary shape to the shape of the protrusion 41 of the male embossing tool 5.
  • the recesses 42 may also be formed under other conditions depending on the material.
  • a first female embossing tool 6 has been obtained, which can now be used as many times as necessary, in cooperation with the first male embossing tool 5.
  • the embossing of a cardboard blank 60 is made and a deformation thereof is obtained under the shape of an embossing 61 in accordance with Figs. 5 and 6 .
  • a second female embossing tool is made by first restoring the smooth initial shape of the blank. surface of the plate 44.
  • a step is to carry the female embossing tool 6 to a temperature sufficient to exceed the transformation temperature of the shape memory material component plate 44.
  • the female embossing tool 6 is placed in a heated oven for this purpose, after removing the pair of embossing tools 5 and 6. Radiant heat input can also be achieved. In this way, the depression 42 clears because the shape memory material of the plate 44 returns to its original shape, namely a hollow-free surface.
  • This delivery in the starting form of the female embossing tool 6 allows to start on a new series of deformation of cardboard blanks 60 in another form and / or another relief.
  • Figs. 9 and 10 is shown the method of producing a second female embossing tool according to the invention.
  • a step consists in providing a second male embossing tool 5 'whose plate 43' defines a second protrusion 41 '( Fig. 9 ) having a different shape from the first protuberance 41 ( Fig. 3 ).
  • Another step is to provide the female embossing tool 6 resulting from the previously described heating and whose plate 44 has a smooth outer face ( Fig. 9 ).
  • the invention also relates to a method of embossing a flat member for forming a package, wherein the embossing operation of the flat member is performed with a pair of embossing tools among those described herein. .
  • the flat element is preferably a carton blank, whether of cardboard, corrugated cardboard or multilayer cardboard with flat cardboard and corrugated cardboard.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Making Paper Articles (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Description

La présente invention concerne un procédé de réalisation d'un outil de gaufrage femelle. L'invention se rapporte à un outil de gaufrage femelle. L'invention se rapporte à une paire d'outil de gaufrage, comprenant un outil de gaufrage mâle et un outil de gaufrage femelle. L'invention se rapporte également à un module de gaufrage pour des éléments plats destinés à former des emballages, équipé avec un outil de gaufrage femelle.The present invention relates to a method of producing a female embossing tool. The invention relates to a female embossing tool. The invention relates to a pair of embossing tools, comprising a male embossing tool and a female embossing tool. The invention also relates to an embossing module for flat elements for forming packages, equipped with a female embossing tool.

Une machine de traitement d'éléments plats, par exemple une machine d'impression, de découpe ou de pliage-collage, est utilisée dans l'industrie de l'emballage, par exemple pour imprimer, découper ou plier-coller des éléments plats, tels que des feuilles de carton. Ces feuilles imprimées servent ensuite à confectionner des boîtes en carton.A flat element processing machine, for example a printing, cutting or folding-gluing machine, is used in the packaging industry, for example to print, cut or fold and glue flat elements, such as cardboard sheets. These printed sheets are then used to make cardboard boxes.

A titre d'exemple, des machines de type presses à platine réalisent la découpe et le gaufrage, puis des machines appelées plieuses-colleuses réalisent le pliage et le collage de flans ou découpes de cartons, en vue de former un emballage. L'étape de gaufrage, permet de donner du relief à la feuille de carton, pour des raisons fonctionnelles et en particulier pour former des lignes de pré-pliage, ou pour des raisons purement esthétiques.For example, machines of the platen press type perform cutting and embossing, then machines called folder-gluers perform the folding and gluing of blanks or blanks of cartons, to form a package. The embossing step makes it possible to give relief to the sheet of cardboard, for functional reasons and in particular to form pre-folding lines, or for purely aesthetic reasons.

Plus précisément, la présente invention concerne un module de gaufrage muni d'une paire d'outils de gaufrage mâle et femelle, comprenant un tel outil de gaufrage femelle. L'invention concerne un procédé de gaufrage d'une découpe de carton utilisant une telle paire d'outils de gaufrage.More specifically, the present invention relates to an embossing module provided with a pair of male and female embossing tools, including such a female embossing tool. The invention relates to a method of embossing a carton blank using such a pair of embossing tools.

Etat de la techniqueState of the art

Le document EP 0879197 présente un exemple de machine à découper et à gaufrer à platine. Les outils de découpe et de gaufrage sont insérés dans la machine et servent à découper des feuilles de carton.The document EP 0879197 presents an example of platen cutting and embossing machine. The cutting and embossing tools are inserted into the machine and used to cut cardboard sheets.

Le document WO 2014/135265 présente une machine avec des outils de gaufrage rotatifs. Dans ce cas, l'agencement de gaufrage placé dans une cassette de gaufrage est équipé d'un outil rotatif supérieur de gaufrage, positionné parallèlement à un outil rotatif inférieur de gaufrage. Une bande continue de carton est gaufrée grâce à cette cassette.The document WO 2014/135265 presents a machine with rotary embossing tools. In this case, the embossing arrangement placed in an embossing cassette is equipped with an upper rotary embossing tool, positioned parallel to a lower rotary embossing tool. A continuous strip of cardboard is embossed thanks to this cassette.

Le document EP 1932657 décrit un dispositif pour gaufrer des caractères brailles sur des découpes de carton avec des outils de gaufrage rotatifs. Dans ce cas, le résultat du gaufrage est un relief fonctionnel utilisé pour des messages en braille sur certaines boîtes d'emballage, en particulier sur les boîtes de médicaments et permettre une lecture tactile des messages.The document EP 1932657 discloses a device for embossing braille characters on cardboard blanks with rotary embossing tools. In this case, the result of the embossing is a functional relief used for Braille messages on some packaging boxes, especially on the drug boxes and allow tactile reading of the messages.

Dans tous ces cas, les outils de gaufrage mâle et femelle sont fabriqués, notamment par usinage, avec des protubérances à la surface de l'outil mâle et des creux complémentaires à la surface de l'outil femelle. En conséquence, si le fabriquant souhaite faire des petites séries, le coût de fabrication de chaque paire d'outils ne permet pas de la faire avec un prix de revient faible pour chaque emballage. Ainsi, pour la fabrication d'emballage pour des produits de grande consommation, ces outillages de gaufrage étant fabriqués sur mesure, ils ne sont abordables que pour des séries importantes, par exemple de l'ordre de 50'000 à 200'000 boîtes au minimum. Des petites séries, en particulier de l'ordre ou inférieure au millier de boîtes ne sont possibles que pour des produits de grande valeur, ou dans le domaine du luxe. De plus, la commande des outils doit être passée longtemps à l'avance, en raison du temps nécessaire à leur réalisation.In all these cases, the male and female embossing tools are manufactured, in particular by machining, with protuberances on the surface of the male tool and complementary recesses on the surface of the female tool. Consequently, if the manufacturer wishes to make small series, the cost of manufacturing each pair of tools does not allow to do it with a low cost for each package. Thus, for the manufacture of packaging for consumer goods, these embossing tools being made to measure, they are only affordable for large series, for example of the order of 50,000 to 200,000 boxes. minimum. Small series, in particular of the order or less than a thousand boxes are only possible for high value products, or in the field of luxury. In addition, the order of the tools must be passed well in advance, because of the time necessary to their realization.

De plus, lors de la fabrication d'une paire d'outils de gaufrage mâle et femelle, le fabriquant cherche à obtenir la meilleure complémentarité de forme entre les protubérances à la surface de l'outil mâle et les creux à la surface de l'outil femelle, et ce afin d'obtenir une déformation de la matière idéalement sans pincement, et sans écrasement par réduction trop importante de l'épaisseur du carton, ou tout au moins avec un minimum de ces phénomènes.In addition, during the manufacture of a pair of male and female embossing tools, the manufacturer seeks to obtain the best complementarity of shape between the protuberances on the surface of the male tool and the depressions on the surface of the female tool, and this in order to obtain a deformation of the material ideally without pinching, and without crushing too much reduction in the thickness of the carton, or at least with a minimum of these phenomena.

Par ailleurs, malgré la mise en oeuvre soignée du procédé de fabrication pour obtenir des reliefs complémentaires entre l'outil de gaufrage femelle et l'outil de gaufrage mâle, encore faut-il que cette bonne complémentarité de forme persiste après le montage de cette paire d'outils de gaufrage et tout au long des très nombreux mouvements successifs de l'un ou de l'autre, voire des deux outils de gaufrage, durant la fabrication des emballages.Moreover, despite the careful implementation of the manufacturing process to obtain complementary reliefs between the female embossing tool and the male embossing tool, it is still necessary that this good complementarity of shape persists after mounting this pair embossing tools and throughout the many successive movements of one or the other or the two embossing tools, during the manufacture of packaging.

Le document US 4 084 500 divulgue un procédé de réalisation d'un rouleau de gaufrage femelle.The document US 4,084,500 discloses a method of making a female embossing roll.

Résumé de l'inventionSummary of the invention

Un but de la présente invention est de proposer un procédé de réalisation d'un outil de gaufrage femelle exempt des limitations des outils de gaufrage femelle connus. Un autre but de l'invention est de rendre plus souple la fabrication d'emballage avec des agencements de gaufrage différents, afin de pouvoir être en mesure de fabriquer des petites ou moyennes séries d'emballage. Un autre but de l'invention est de proposer un moyen d'obtention d'un outil de gaufrage femelle adaptable à de multiples outils de gaufrage mâles afin d'éviter de fabriquer un nouvel outillage complet pour chaque modification de relief souhaité à la surface du carton.An object of the present invention is to provide a method of making a female embossing tool free from the limitations of known female embossing tools. Another object of the invention is to make the manufacture of packaging more flexible with different embossing arrangements, in order to be able to manufacture small or medium series of packaging. Another object of the invention is to provide a means for obtaining a female embossing tool adaptable to multiple male embossing tools to avoid making new complete tooling for each desired relief modification to the surface of the carton.

Selon l'invention, ces buts sont atteints notamment au moyen d'un outil de gaufrage femelle pour des éléments plats destinés à former des emballages, qui est revêtu d'une couche extérieure réalisée dans un matériau présentant des propriétés de type mémoire de forme.According to the invention, these objects are achieved in particular by means of a female embossing tool for flat elements intended to form packages, which is coated with an outer layer made of a material having shape memory properties.

Egalement, selon l'invention ces buts sont également atteints par un procédé de réalisation d'un outil de gaufrage femelle destiné au gaufrage d'un élément plat, qui comprend les étapes consistant à:

  • fournir un outil de gaufrage femelle revêtu d'une couche extérieure réalisée dans un matériau présentant des propriétés de type mémoire de forme et dont la face extérieure est dépourvue de creux,
  • fournir un outil de gaufrage mâle dont la face extérieure est pourvue d'au moins une protubérance correspondant à au moins un relief d'embossage souhaité sur l'élément plat après gaufrage, et
  • faire coopérer l'outil de gaufrage mâle avec l'outil de gaufrage femelle, de sorte que la couche extérieure de l'outil de gaufrage femelle subit une déformation plastique qui créé au moins un creux de forme complémentaire à la ou aux protubérances de l'outil de gaufrage mâle.
Also, according to the invention these objects are also achieved by a method of producing a female embossing tool for embossing a flat member, which comprises the steps of:
  • providing a female embossing tool coated with an outer layer made of a material having shape memory-like properties and whose outer face is devoid of recesses,
  • providing a male embossing tool whose outer face is provided with at least one protuberance corresponding to at least one desired embossing relief on the flat element after embossing, and
  • cooperating the male embossing tool with the female embossing tool, so that the outer layer of the female embossing tool undergoes a plastic deformation which creates at least one complementary shaped depression to the protrusion or protuberances of the male embossing tool.

Ce procédé de réalisation s'applique notamment lors de la première utilisation de l'outil de gaufrage femelle ou bien d'un outil de gaufrage femelle déjà préalablement remis dans une forme initiale de départ, avec sa face périphérique dépourvue du ou des creux.This method of implementation applies in particular during the first use of the female embossing tool or a female embossing tool already previously returned to an initial form of departure, with its peripheral face devoid of or hollow.

Dans l'ensemble de la description, le gaufrage est défini, à titre d'exemple non exhaustif, comme étant toute opération de déformation mécanique de l'élément plat par écrasement entre une forme positive munie d'une ou plusieurs convexités ou protubérances, i.e. l'outil mâle, et une forme négative, munie d'une ou plusieurs concavités ou creux, i.e. l'outil femelle. Le gaufrage peut ainsi être un gaufrage classique, un rainurage, un refoulage, ou d'autres encore.Throughout the description, the embossing is defined, by way of non-exhaustive example, as any mechanical deformation operation of the flat element by crushing between a positive shape provided with one or more convexities or protuberances, ie the male tool, and a negative form, provided with one or more concavities or recesses, ie the female tool. The embossing can thus be a conventional embossing, grooving, creasing, or others.

Le matériau présentant des propriétés de type mémoire de forme est défini, à titre d'exemple non exhaustif, comme étant un matériau déformable, apte à passer d'une forme initiale à une forme finale. Le matériau présentant des propriétés de type mémoire de forme présente en outre des capacités à retrouver sa forme initiale de départ s'il est soumit à des conditions déterminées dépendant du type de matériau.The material having shape memory properties is defined, by way of non-exhaustive example, as being a deformable material capable of passing from an initial form to a final form. The material having shape memory properties also has the ability to recover its original starting shape if it is subjected to specific conditions depending on the type of material.

Un élément plat est défini, à titre d'exemple non exhaustif, comme étant en un matériau en feuille, en plaque, en bande continue tel que du papier, du carton plat, du carton ondulé, du carton ondulé contrecollé, du plastique flexible, par exemple du polyéthylène (PE), du polyéthylène téréphtalate (PET), du polypropylène biorienté (BOPP), ou d'autres polymères, ou d'autres matériaux encore. Le support plan est défini, à titre d'exemple non exhaustif, comme étant une feuille destinée à former une découpe, puis une boîte d'emballage après pliage-collage.A flat element is defined, by way of non-exhaustive example, as a sheet, plate, continuous web material such as paper, cardboard, corrugated cardboard, laminated corrugated cardboard, flexible plastic, for example polyethylene (PE), polyethylene terephthalate (PET), bioriented polypropylene (BOPP), or other polymers, or other materials. The flat support is defined, by way of non-exhaustive example, as being a sheet intended to form a cut, and then a packaging box after folding-gluing.

Autrement dit, ce procédé permet de réaliser de manière très rapide des outils femelles, sans augmenter de manière aussi significative qu'aujourd'hui le prix de revient de chaque emballage par rapport à de grandes séries de l'ordre de plusieurs centaines de milliers d'emballages par exemple.In other words, this process makes it possible to very quickly produce female tools, without increasing as significantly as today the cost price of each package compared to large series of the order of several hundred thousand dollars. packaging, for example.

En outre, selon l'invention ces buts sont également atteints par un procédé de réalisation d'un outil de gaufrage femelle destiné au gaufrage d'un élément plat, comprenant les étapes suivantes consistant:

  • à fournir un outil de gaufrage femelle revêtu d'une couche extérieure réalisée dans un matériau présentant des propriétés de type mémoire de forme, et dont la face extérieure comprend au moins un creux,
  • à porter la face extérieure de l'outil de gaufrage femelle dans des conditions choisies de façon à ce que la face extérieure redevienne dépourvue de creux,
  • à fournir un outil de gaufrage mâle dont la face extérieure est pourvue d'au moins une protubérance correspondant à au moins un relief d'embossage souhaité sur l'élément plat à l'issue du gaufrage,
  • à faire coopérer l'outil de gaufrage mâle avec l'outil de gaufrage femelle, de sorte que la couche extérieure de l'outil de gaufrage femelle subit une déformation plastique qui créé au moins un creux de forme complémentaire à au moins une protubérance de l'outil de gaufrage mâle.
In addition, according to the invention these objects are also achieved by a method of producing a female embossing tool for embossing a flat member, comprising the following steps:
  • providing a female embossing tool coated with an outer layer made of a material having shape memory properties, and whose outer face comprises at least one hollow,
  • to wear the outer face of the female embossing tool in selected conditions so that the outer face does not become hollow again,
  • providing a male embossing tool whose outer face is provided with at least one protuberance corresponding to at least one desired embossing relief on the flat element at the end of the embossing,
  • in causing the male embossing tool to cooperate with the female embossing tool, so that the outer layer of the female embossing tool undergoes a plastic deformation which creates at least one recess of complementary shape to at least one protuberance of the embossing tool. male embossing tool.

Ce procédé de réalisation s'applique notamment lors de la deuxième utilisation ou bien d'une utilisation ultérieure d'un outil de gaufrage ayant au départ une forme correspondant à un usage précédent, c'est-à-dire avec une face périphérique munie de creux.This method of implementation applies in particular during the second use or a subsequent use of an embossing tool initially having a shape corresponding to a previous use, that is to say with a peripheral face provided with hollow.

De préférence, le matériau est choisi parmi les alliages métalliques à mémoire de forme, et les matériaux polymères présentant des propriétés de type mémoire de forme. A titre d'exemple, l'étape consistant à porter la face extérieure de l'outil de gaufrage femelle dans des conditions choisies, i.e. la transformation peux se faire par chauffage, irradiation UV, ou d'autres encore.Preferably, the material is selected from shape memory metal alloys, and polymeric materials having shape memory properties. For example, the step of wearing the outer face of the female embossing tool in selected conditions, ie the transformation can be done by heating, UV irradiation, or others.

Cette solution présente notamment l'avantage par rapport à l'art antérieur d'assurer une complémentarité de forme très précise et donc particulièrement stricte, entre les protubérances de l'outil de gaufrage mâle et les dépressions formées par déformation de la face extérieure de l'outil de gaufrage femelle.This solution has the advantage over the prior art of ensuring a very precise complementarity and therefore particularly strict, between the protuberances of the male embossing tool and the depressions formed by deformation of the outer face of the female embossing tool.

Ainsi, un relief d'embossage à la carte est réalisé sur l'élément plat avec le même outil de gaufrage femelle, en pouvant faire varier notamment l'agencement, la forme, la longueur, la largeur, la profondeur des lignes ou tout autre forme géométrique de rainurage ou de gaufrage.Thus, embossing embossing à la carte is performed on the flat element with the same female embossing tool, being able to vary in particular the arrangement, the shape, the length, the width, the depth of the lines or any other geometric shape of grooving or embossing.

En outre, par la fabrication d'un seul outil de gaufrage femelle, le fabriquant d'emballage dispose potentiellement d'une série illimitée creux possibles et donc de reliefs possibles pour l'élément plat. De plus, le procédé de réalisation de l'outil de gaufrage femelle étant tellement simple et rapide à mettre en oeuvre que le prix de revient global de la paire d'outils de gaufrage est réduite quasiment de moitié et recouvre essentiellement uniquement celui de l'outil de gaufrage mâle tant le même outil de gaufrage femelle est devenu adaptable à beaucoup de configurations.In addition, by manufacturing a single female embossing tool, the packaging manufacturer potentially has an unlimited series of possible hollows and therefore possible reliefs for the flat element. In addition, the method of producing the female embossing tool is so simple and quick to implement that the overall cost of the pair of embossing tools is reduced by almost half and essentially covers only that of the embossing tool. Male embossing tool both the same female embossing tool has become adaptable to many configurations.

La présente invention porte également sur un outil de gaufrage femelle plan formant un outil pour une presse à platine pour le gaufrage d'éléments plats destinés à former des emballages, qui comprend une plaque avec une couche extérieure réalisée dans un matériau à mémoire de forme.The present invention also relates to a planar female embossing tool forming a tool for a platen press for embossing flat elements for forming packages, which comprises a plate with an outer layer made of a shape memory material.

En outre, la présente invention porte sur un outil de gaufrage femelle rotatif, pour le gaufrage d'éléments plats destinés à former des emballages, qui comprend une bande extérieure réalisée dans un matériau à mémoire de forme ou comprenant avec une couche extérieure réalisée dans un matériau à mémoire de forme.Furthermore, the present invention relates to a rotary female embossing tool for embossing flat elements for forming packages, which comprises an outer strip made of a shape memory material or comprising with an outer layer made in a shape memory material.

On comprend en effet que cette solution adaptative pour l'outil de gaufrage femelle est aussi bien applicable pour des outils plans de presse à platine que pour des outils rotatifs.It will be understood that this adaptive solution for the female embossing tool is equally applicable for flat platen press tools as well as for rotary tools.

Ainsi, la présente invention porte aussi sur une paire d'outils de gaufrage pour un élément plat, tel qu'une découpe de carton, comprenant un outil de gaufrage mâle dont la face extérieure est pourvue de protubérances correspondant aux reliefs d'embossage souhaités sur l'élément plat à l'issue du gaufrage, et un outil de gaufrage femelle tel que l'un de ceux précédemment définis, de forme et de dimension compatibles avec l'outil de gaufrage mâle.Thus, the present invention also relates to a pair of embossing tools for a flat element, such as a cardboard blank, comprising a male embossing tool whose outer face is provided with protuberances corresponding to the embossing reliefs desired on the flat element after the embossing, and a female embossing tool such as one of those previously defined, shaped and dimension compatible with the male embossing tool.

D'une manière générale, la présente invention porte également sur un module de gaufrage, qui comprend un outil de gaufrage femelle, ou une paire d'outils de gaufrage. L'invention porte sur une machine de traitement d'éléments plats destinés à former des emballages, qui comprend un outil de gaufrage femelle, ou une paire d'outils de gaufrage, ou un module de gaufrage, tel que l'un de ceux précédemment définis. La machine est du type plieuse-colleuse, presse de découpe à platine, machine d'impression et de traitement d'une bande continue, ou d'autres encore.In general, the present invention also relates to an embossing module, which comprises a female embossing tool, or a pair of embossing tools. A flat member processing machine for forming packages, which includes a female embossing tool, or a pair of embossing, or an embossing module, such as one of those previously defined. The machine is the type of folder-gluer, platen cutting press, printing machine and treatment of a continuous band, or others.

Brève description des dessinsBrief description of the drawings

L'invention sera bien comprise et ses divers avantages et différentes caractéristiques ressortiront mieux lors de la description suivante, de l'exemple non limitatif de réalisation, en référence aux dessins schématiques annexés, dans lesquels:

  • la Figure 1 est une vue schématique d'une machine plieuse-colleuse, vue du côté gauche par rapport au sens de transport des découpes de carton,
  • la Figure 2 est une vue illustrant un exemple de paire d'outils de gaufrage mâle et femelle, avec un outil de gaufrage femelle réalisé selon l'invention,
  • les Figures 3 à 10 représentent les étapes de réalisation d'un premier outil de gaufrage femelle selon l'invention, son utilisation, puis son adaptation selon un autre profil pour réaliser un deuxième outil de gaufrage différent du premier outil de gaufrage.
The invention will be better understood and its various advantages and different characteristics will become more apparent in the following description, of the nonlimiting exemplary embodiment, with reference to the appended diagrammatic drawings, in which:
  • the Figure 1 is a schematic view of a folder-gluer machine, viewed from the left side with respect to the direction of transport of the cardboard blanks,
  • the Figure 2 is a view illustrating an example of a pair of male and female embossing tools, with a female embossing tool made according to the invention,
  • the Figures 3 to 10 represent the steps of producing a first female embossing tool according to the invention, its use, then its adaptation according to another profile to produce a second embossing tool different from the first embossing tool.

Exposé détaillé de modes de réalisation préférésDetailed description of preferred embodiments

La Fig. 1 illustre une plieuse-colleuse illustrant une application possible de l'invention. Dans cet exemple, les découpes de carton arrivent dans la plieuse-colleuse par l'entrée E et sont récupérées sous forme de boîtes pliées à la sortie S, en étant traitées le long de la trajectoire des découpes de carton, dont le sens de transport est indiqué par une flèche F. La plieuse-colleuse comporte successivement de l'entrée E à la sortie S, une station de marge 10, un module de cassage 20, un module 30 qu'on appellera "module de gaufrage", un module de pliage 40 et une station de réception 50.The Fig. 1 illustrates a folder-gluer illustrating a possible application of the invention. In this example, the cardboard blanks arrive in the folder-gluer by the entry E and are recovered in the form of boxes folded at the exit S, being treated along the path of the cardboard blanks, whose direction of transport is indicated by an arrow F. The folder-gluer successively comprises from the input E to the output S, a margin station 10, a breaking module 20, a module 30 which will be called "embossing module", a module 40 and a receiving station 50.

La fonction du module de gaufrage 30 est d'imprimer mécaniquement un relief sur les découpes de carton défilant dans la plieuse-colleuse, au moyen de la paire d'outils rotatifs 5 et 6. De telles formes en relief peuvent constituer par exemple des lignes de refoulage pour un futur pliage au niveau de ces lignes, ou encore des caractères brailles ainsi imprimés, ou encore des éléments graphiques en relief à but décoratif.The function of the embossing module 30 is to mechanically print a relief on the cardboard blanks moving in the folder-gluer, by means of the pair of rotary tools 5 and 6. Such relief shapes may constitute for example lines de crease for a future folding at these lines, or braille characters thus printed, or graphic elements in relief for decorative purposes.

La Fig. 2 illustre un exemple d'une paire d'outils 5 et 6 selon l'invention. Les outils 5 et 6 comportent un outil de gaufrage rotatif mâle 5 et un outil de gaufrage rotatif femelle 6. L'outil mâle 5 est constitué par un cylindre dont la surface périphérique est parsemée de picots (ou protubérances) 41. L'outil femelle 6 est constitué par un cylindre dont la surface périphérique est parsemée de creux (ou dépressions) 42. L'outil de gaufrage mâle 5 est de forme et de dimension compatibles avec l'outil de gaufrage femelle 6. Lors de l'impression braille, les picots 41 pénètrent dans l'épaisseur du carton pour former des caractères brailles.The Fig. 2 illustrates an example of a pair of tools 5 and 6 according to the invention. The tools 5 and 6 comprise a male rotary embossing tool 5 and a female rotary embossing tool 6. The male tool 5 is constituted by a cylinder whose peripheral surface is dotted with pins (or protuberances) 41. The female tool 6 is constituted by a cylinder whose peripheral surface is dotted with recesses (or depressions) 42. The male embossing tool 5 is of shape and size compatible with the female embossing tool 6. When braille printing, the pins 41 enter the the thickness of the cardboard to form braille characters.

Avantageusement, les picots 41 et les creux 42 sont portés par une plaque respective 43, 44 en forme de bande enroulée sur l'outil cylindrique respectif 5, 6 pour en former la face extérieure.Advantageously, the pins 41 and the recesses 42 are carried by a respective plate 43, 44 in the form of a strip wound on the respective cylindrical tool 5, 6 to form the outer face.

Selon l'invention, la plaque 44 de l'outil femelle 6 est réalisée en matériau à mémoire de forme.According to the invention, the plate 44 of the female tool 6 is made of shape memory material.

Le matériau est choisi parmi les alliages métalliques à mémoire de forme, par exemple de type CuAINi , CuZnAl et NiTi, des polymères présentant des propriétés de type mémoire de forme, comme par exemple des PVC expansé ou des TPU, et d'autres encore.The material is chosen from metal alloys with shape memory, for example of the CuAlNi, CuZnAl and NiTi type, polymers having shape memory type properties, for example expanded PVCs or TPUs, and others.

Par contre, l'outil mâle 5 est toujours réalisé au moyen d'une plaque métallique 43, telle qu'un feuillard ou une plaque d'acier massive usinée pour présenter à sa surface le relief en saillie recherché, constitué de protubérances ponctuelles, linéaires, plus ou moins étendues, continues, discontinues, etc.On the other hand, the male tool 5 is always made by means of a metal plate 43, such as a strip or a solid steel plate machined to present on its surface the desired protruding relief, consisting of point protrusions, linear more or less extensive, continuous, discontinuous, etc.

Les Figs. 3 à 10 illustrent le procédé de réalisation d'un premier outil de gaufrage femelle selon l'invention, son utilisation pour le gaufrage d'une découpe de carton et le procédé de réalisation d'un deuxième outil de gaufrage femelle présentant un relief différent à partir du premier outil de gaufrage femelle.The Figs. 3 to 10 illustrate the method of producing a first female embossing tool according to the invention, its use for embossing a cardboard blank and the method of producing a second female embossing tool having a different relief from the first female embossing tool.

Pour réaliser le premier outil de gaufrage femelle, une étape consiste à fournir un premier outil de gaufrage mâle 5, dont la plaque 43 définit une première protubérance 41 (Fig. 3). Une autre étape consiste à fournir un outil de gaufrage femelle 6 selon l'invention dont la plaque ou couche externe 44 est réalisée en matériau à mémoire de forme, et qui se trouve ici dans une forme de départ non déformée se traduisant par une face extérieure lisse.To realize the first female embossing tool, a step consists in providing a first male embossing tool 5, whose plate 43 defines a first protrusion 41 (FIG. Fig. 3 ). Another step is to provide a female embossing tool 6 according to the invention, the plate or outer layer 44 is made of shape memory material, and which is here in a non-distorted starting shape resulting in an outer face smooth.

Ensuite dans une autre étape qui suit (Fig. 4), la plaque 43 est rapprochée contre la plaque 44 (Flèche A1) en exerçant une contrainte pour que la protubérance 41 pénètre dans la plaque 44, et engendre une déformation sous forme d'une dépression à la surface et dans une portion de l'épaisseur de la plaque 44. Ce déplacement relatif entre la plaque 43 et la plaque 44 est opéré par exemple, jusqu'au contact entre la plaque 43 et la plaque 44 de part et d'autre de la protubérance 41. Par cette opération de déformation, réalisée par exemple à température ambiante, une dépression 42 est formée (Figs. 4 et 5) à la surface de l'outil de gaufrage femelle 6 qui est systématiquement et exactement de forme complémentaire à la forme de la protubérance 41 de l'outil de gaufrage mâle 5. Les creux 42 peuvent être également formés sous d'autres conditions dépendant du matériau.Then in another step that follows ( Fig. 4 ), the plate 43 is brought against the plate 44 (Arrow A1) by exerting a constraint so that the protrusion 41 enters the plate 44, and causes a deformation in the form of a depression on the surface and in a portion of the plate thickness 44. This relative displacement between the plate 43 and the plate 44 is operated for example until the contact between the plate 43 and the plate 44 on either side of the protrusion 41. By this deformation operation , carried out for example at room temperature, a depression 42 is formed ( Figs. 4 and 5 ) on the surface of the female embossing tool 6 which is systematically and exactly of complementary shape to the shape of the protrusion 41 of the male embossing tool 5. The recesses 42 may also be formed under other conditions depending on the material.

On a ainsi obtenu un premier outil de gaufrage femelle 6 qui peut maintenant être utilisé autant de fois que nécessaire, en coopération avec le premier outil de gaufrage mâle 5. Ainsi, en rapprochant l'un de l'autre (Flèche A2) puis par mise en compression d'une découpe de carton 60 entre le premier outil de gaufrage femelle 6 obtenu par déformation et l'outil de gaufrage mâle 5, le gaufrage d'une découpe de carton 60 est réalisé et une déformation de ce dernier est obtenue sous la forme d'un gaufrage 61 conformément aux Figs. 5 et 6.Thus, a first female embossing tool 6 has been obtained, which can now be used as many times as necessary, in cooperation with the first male embossing tool 5. Thus, by moving towards one another (Arrow A2) and then by compression of a carton blank 60 between the first female embossing tool 6 obtained by deformation and the male embossing tool 5, the embossing of a cardboard blank 60 is made and a deformation thereof is obtained under the shape of an embossing 61 in accordance with Figs. 5 and 6 .

Lorsque les opérations de gaufrage de la série prévue de découpes de carton 60 sont terminées et qu'il est nécessaire de passer au gaufrage selon une autre forme, un deuxième outil de gaufrage femelle est réalisé en rétablissant en premier lieu la forme initiale lisse de la surface de la plaque 44. A cet effet, comme le représentent les Figs. 7 et 8, une étape consiste à porte l'outil de gaufrage femelle 6 à une température suffisante pour qu'elle dépasse la température de transformation du matériau à mémoire de forme composant la plaque 44. Par exemple, l'outil de gaufrage femelle 6 est placé dans une étuve chauffée à cet effet, après avoir démonté la paire d'outils de gaufrage 5 et 6. Un apport de chaleur par rayonnement peut également être réalisé. De cette façon, la dépression 42 s'efface car le matériau à mémoire de forme de la plaque 44 retrouve sa forme initiale, à savoir une surface dépourvue de creux.When the embossing operations of the intended series of cardboard blanks 60 are completed and it is necessary to emboss in another form, a second female embossing tool is made by first restoring the smooth initial shape of the blank. surface of the plate 44. For this purpose, as shown by the Figs. 7 and 8 a step is to carry the female embossing tool 6 to a temperature sufficient to exceed the transformation temperature of the shape memory material component plate 44. For example, the female embossing tool 6 is placed in a heated oven for this purpose, after removing the pair of embossing tools 5 and 6. Radiant heat input can also be achieved. In this way, the depression 42 clears because the shape memory material of the plate 44 returns to its original shape, namely a hollow-free surface.

Cette remise dans la forme de départ de l'outil de gaufrage femelle 6 permet de repartir sur une nouvelle série de déformation de découpes de carton 60 selon une autre forme et/ou un autre relief. Sur les Figs. 9 et 10 est représenté le procédé de réalisation d'un deuxième outil de gaufrage femelle selon l'invention.This delivery in the starting form of the female embossing tool 6 allows to start on a new series of deformation of cardboard blanks 60 in another form and / or another relief. On the Figs. 9 and 10 is shown the method of producing a second female embossing tool according to the invention.

Pour réaliser le deuxième outil de gaufrage femelle, une étape consiste à fournir un deuxième outil de gaufrage mâle 5', dont la plaque 43' définit une deuxième protubérance 41' (Fig. 9) présentant une forme différente de la première protubérance 41 (Fig. 3). Une autre étape consiste à fournir l'outil de gaufrage femelle 6 résultant du chauffage précédemment décrit et dont la plaque 44 présente une face extérieure lisse (Fig. 9).In order to produce the second female embossing tool, a step consists in providing a second male embossing tool 5 'whose plate 43' defines a second protrusion 41 '( Fig. 9 ) having a different shape from the first protuberance 41 ( Fig. 3 ). Another step is to provide the female embossing tool 6 resulting from the previously described heating and whose plate 44 has a smooth outer face ( Fig. 9 ).

Ensuite, dans une étape supplémentaire consiste à rapprocher (Fig. 10) la plaque 43' contre la plaque 44 (Flèche A3) en exerçant une contrainte suffisante pour que la protubérance 41' pénètre dans la plaque 44, et engendre une déformation sous forme d'une dépression à la surface et dans une portion de l'épaisseur de la plaque 44. Ce déplacement relatif entre la plaque 43' et la plaque 44 est opéré par exemple jusqu'au contact entre la plaque 43' et la plaque 44 de part et d'autre de la protubérance 41'. Par cette opération de déformation, réalisée à température ambiante, une dépression 42' est formée (Fig. 10) à la surface de l'outil de gaufrage femelle 6 qui est systématiquement et exactement de forme complémentaire à la forme la protubérance du deuxième outil de gaufrage mâle 5'.Then, in an additional step is to bring closer ( Fig. 10 ) the plate 43 'against the plate 44 (Arrow A3) by exerting sufficient stress so that the protrusion 41' enters the plate 44, and causes a deformation in the form of a depression on the surface and in a portion of the the thickness of the plate 44. This relative displacement between the plate 43 'and the plate 44 is operated for example until the contact between the plate 43' and the plate 44 on either side of the protuberance 41 '. By this deformation operation, carried out at ambient temperature, a depression 42 'is formed ( Fig. 10 ) on the surface of the female embossing tool 6 which is systematically and exactly of shape complementary to the shape of the protuberance of the second male embossing tool 5 '.

On a ainsi obtenu un deuxième outil de gaufrage femelle 6 qui peut maintenant être utilisé autant de fois que nécessaire, en coopération avec le deuxième outil de gaufrage mâle 5'.There has thus been obtained a second female embossing tool 6 which can now be used as many times as necessary, in cooperation with the second male embossing tool 5 '.

L'invention porte également sur un procédé de gaufrage d'un élément plat destiné à former un emballage, dans lequel l'opération de gaufrage de l'élément plat est réalisée avec une paire d'outils de gaufrage parmi celles décrites dans le présent texte.The invention also relates to a method of embossing a flat member for forming a package, wherein the embossing operation of the flat member is performed with a pair of embossing tools among those described herein. .

Dans les procédés de gaufrage précédemment présentés, l'élément plat est de préférence une découpe de carton, que ce soit du carton plat, du carton ondulé ou un carton multicouche avec carton plat et carton ondulé.In the embossing processes previously described, the flat element is preferably a carton blank, whether of cardboard, corrugated cardboard or multilayer cardboard with flat cardboard and corrugated cardboard.

La présente invention n'est pas limitée aux modes de réalisation décrits et illustrés. De nombreuses modifications peuvent être réalisées, sans pour autant sortir du cadre défini par la portée du jeu de revendications.The present invention is not limited to the embodiments described and illustrated. Many modifications can be made, without departing from the scope defined by the scope of the set of claims.

Claims (11)

  1. Method for producing a female embossing tool (6) intended to emboss a flat element (60), comprising steps consisting of:
    - providing a female embossing tool (6) coated with an outer layer (44) made of a material having shape memory type properties, and of which the outer face has no cavities,
    - providing a male embossing tool (5, 5') of which the outer face is equipped with at least one protrusion corresponding to at least one embossing relief sought on the flat element (60) after embossing, and
    - making the male embossing tool (5, 5') cooperate with the female embossing tool (6), such that the outer layer (44) of the female embossing tool (6) undergoes a plastic deformation which creates at least one cavity (42, 42') of complementary shape to the protrusion(s) (41, 41') of the male embossing tool (5, 5').
  2. Method for producing a female embossing tool (6) intended to emboss a flat element (60), comprising the following steps:
    - providing a female embossing tool (6) coated with an outer layer (44) made of a material having shape memory type properties, and of which the outer face comprises at least one cavity,
    - carrying the outer face of the female embossing tool (6) under the selected conditions such that the outer face goes back to having no cavities,
    - providing a male embossing tool (5, 5') of which the outer face is equipped with at least one protrusion (41, 41') corresponding to at least one embossing relief (42, 42') sought on the flat element (60) from the embossing,
    - making the male embossing tool (5, 5') cooperate with the female embossing tool (6), such that the outer layer (44) of the female embossing tool (6) undergoes a plastic deformation which creates at least one cavity (42, 42') of complementary shape to the protrusion(s) (41, 41') of the male embossing tool.
  3. Method according to claim 1 or 2, wherein the material is selected from among shape memory metal alloys, and polymer materials having shape memory type properties.
  4. Female embossing tool (6) for flat elements intended to form packaging, coated with an outer layer (44) made of a material having shape memory type properties.
  5. Tool according to claim 4, wherein the material is selected from among shape memory metal alloys, and polymer materials having shape memory type properties.
  6. Tool according to claim 4 or 5, characterised in that it is flat and forms a tool for a platen press.
  7. Tool according to claim 4 or 5, characterised in that it has an outer cylindrical face of revolution and forms a rotating female embossing tool (6).
  8. Pair of embossing tools for a flat element (60), comprising a male embossing tool (5, 5') of which the outer face is equipped with protrusions (41, 41') corresponding to the embossing reliefs (42, 42') sought on the flat element (60) from the embossing, and a female embossing tool (6) according to one of claims 4 to 7.
  9. Embossing module for flat elements intended to form packaging, comprising a pair of embossing tools according to claim 8.
  10. Method for embossing a flat element (60) intended to form packaging, wherein the operation of embossing the flat element (60) is done with a pair of embossing tools according to claim 8.
  11. Machine for processing flat elements, comprising a pair of embossing tools according to claim 8.
EP15797859.4A 2014-11-05 2015-10-29 Methods for manufacturing a female embossing tool, embossing tools, embossing module and method, machine equipped with said tools Active EP3218179B1 (en)

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PL15797859T PL3218179T3 (en) 2014-11-05 2015-10-29 Methods for manufacturing a female embossing tool, embossing tools, embossing module and method, machine equipped with said tools

Applications Claiming Priority (2)

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EP14003718 2014-11-05
PCT/EP2015/025075 WO2016074798A1 (en) 2014-11-05 2015-10-29 Method for producing a female embossing tool, female embossing tool, and embossing module provided therewith

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EP3218179B1 true EP3218179B1 (en) 2018-10-24

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US (2) US10618240B2 (en)
EP (1) EP3218179B1 (en)
CN (1) CN107107525B (en)
ES (1) ES2701477T3 (en)
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TW201628832A (en) 2016-08-16
US20200189224A1 (en) 2020-06-18
CN107107525B (en) 2019-04-26
CN107107525A (en) 2017-08-29
US11203174B2 (en) 2021-12-21
ES2701477T3 (en) 2019-02-22
US10618240B2 (en) 2020-04-14
WO2016074798A1 (en) 2016-05-19
TWI651187B (en) 2019-02-21
PL3218179T3 (en) 2019-02-28
EP3218179A1 (en) 2017-09-20
US20170313018A1 (en) 2017-11-02

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