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EP1725393B1 - Machine and method for forming a plate by applying a mandrel - Google Patents

Machine and method for forming a plate by applying a mandrel Download PDF

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Publication number
EP1725393B1
EP1725393B1 EP05717602A EP05717602A EP1725393B1 EP 1725393 B1 EP1725393 B1 EP 1725393B1 EP 05717602 A EP05717602 A EP 05717602A EP 05717602 A EP05717602 A EP 05717602A EP 1725393 B1 EP1725393 B1 EP 1725393B1
Authority
EP
European Patent Office
Prior art keywords
flaps
tray
block
blank
longitudinal
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.)
Not-in-force
Application number
EP05717602A
Other languages
German (de)
French (fr)
Other versions
EP1725393A2 (en
Inventor
Jean-Yves Bacques
Philippe Saison
Eric Schuster
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.)
Otor SA
Original Assignee
Otor 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 Otor SA filed Critical Otor SA
Priority to PL05717602T priority Critical patent/PL1725393T3/en
Publication of EP1725393A2 publication Critical patent/EP1725393A2/en
Application granted granted Critical
Publication of EP1725393B1 publication Critical patent/EP1725393B1/en
Not-in-force 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
    • 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
    • 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
    • B31B50/26—Folding sheets, blanks or webs
    • B31B50/28—Folding sheets, blanks or webs around mandrels, e.g. for forming bottoms
    • B31B50/30—Folding sheets, blanks or webs around mandrels, e.g. for forming bottoms the mandrels moving
    • 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
    • B31B50/26—Folding sheets, blanks or webs
    • B31B50/28—Folding sheets, blanks or webs around mandrels, e.g. for forming bottoms
    • 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
    • B31B50/26—Folding sheets, blanks or webs
    • B31B50/52—Folding sheets, blanks or webs by reciprocating or oscillating members, e.g. fingers
    • 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
    • B31B50/60—Uniting opposed surfaces or edges; Taping
    • B31B50/62—Uniting opposed surfaces or edges; Taping by adhesives
    • B31B50/622—Applying glue on already formed boxes

Definitions

  • the present invention relates to a machine for forming a tray from a blank of sheet material having a bottom panel provided with side flaps forming the side walls of the tray.
  • It also relates to a method of forming a tray from such a blank.
  • Tray forming machines are already known by stamping with a jack inside a well, the flaps of the plate being guided by the side walls of said well during the depression.
  • the present invention aims to provide an apparatus or machine better than those previously known to the requirements of practice in particular in that it avoids inaccuracies due to the driving of a mandrel by piston inside a well causing the previously glued blank.
  • the invention notably proposes a machine for forming a tray from a blank of sheet material comprising a bottom panel provided with lateral flaps, some of which include end flaps and forming the side walls of the blank. tray, said machine comprising the features of claim 1.
  • the mandrel being formed by a retractable reinforcement having four perpendicular or oblique edges with respect to the application face, after application of said mandrel to the bottom panel and folding of the flaps and flaps, said mandrel is retracted so as to distance the edges walls of the formed plate and separates said mandrel from the plate to allow its lateral evacuation.
  • each flap is fixed on the outer face of the adjacent transverse side wall with rim.
  • the blank comprising two opposing longitudinal side flaps respectively provided with end flaps and two opposite transverse side flaps each comprising a longitudinal flap, before formation of the plate, said transverse flaps or adjacent longitudinal flaps are glued by depositing on the lines of the flaps. adhesives during the feeding of the blank, and pressing the longitudinal flaps on the adjacent transverse side flaps to form laps on the flat blank.
  • the figure 1 schematically and partially shows a device or machine 1 for forming a plate 2 from a blank 3 of corrugated cardboard, for example double-sided 2 or 3 mm thick, comprising a rectangular bottom panel 4 with shutters lateral, namely two rectangular longitudinal side flaps 5 and 6 each provided on either side of rectangular end flaps 7, and two rectangular transverse side flaps 8, 9 with no flap, said flaps and flaps 5, 6, 7 , 8 and 9 forming the side walls 10 of the plate 2.
  • a device or machine 1 for forming a plate 2 from a blank 3 of corrugated cardboard, for example double-sided 2 or 3 mm thick, comprising a rectangular bottom panel 4 with shutters lateral, namely two rectangular longitudinal side flaps 5 and 6 each provided on either side of rectangular end flaps 7, and two rectangular transverse side flaps 8, 9 with no flap, said flaps and flaps 5, 6, 7 , 8 and 9 forming the side walls 10 of the plate 2.
  • the machine 1 comprises a system (not shown) for gripping and removing blanks one by one of known type, by suction cups, on a rail 11 for supporting and moving the blank thus laid flat on said rail 11.
  • the displacement of the blank is here again in a manner known per se, for example by means of pusher fingers, or by drive rollers 12, lateral guide rails 13 parallel to the support rail 11, for framing initially, to guide it, the blank transversely.
  • the blank 3 is glued (mixed lines 14) on its flaps and / or flaps intended to form the walls by gluing, while being moved to put the panel 4 in line with a movable mandrel 15 vertically (arrow 16) between a retracted position and an application position by means of application means 17 for example comprising a vertical jack.
  • the mandrel 15 has an application face 18 of the panel 4 on the rail 11 which is arranged at this location to form a bearing surface 19 on at least a portion of the outer surface of said bottom panel.
  • the surface and / or the width of the rail is sufficient to allow a homogeneous distribution of the support over the entire length of the panel 4 and a width of said sufficient panel, for example 1/5 or 1 / 3 of said width centrally relative to the blank.
  • corrugated cardboard is a sometimes capricious material, which can curl and / or twist depending on the temperature, humidity, and more generally storage conditions.
  • a blank 3 can, as shown on the figure 1 the deposition station, does not occupy the entire area between the two guide rails 13 side, resulting in spacings d, d 'of the rails 13, which will be reflected at the fold lines between components and in particular panel.
  • the mandrel comprises lateral bearing faces 23 defined by edges 24, the application face being of the size of the bottom panel 4, and the edges 24 coinciding with the vertical fold lines 25 of the corners of the plate thus formed around the mandrel.
  • Means 26 for example comprising cylinders 27 are arranged to fold flaps and flaps on the mandrel, in a manner known per se, and for compress side flaps and flaps appropriately glued beforehand, so as to allow attachment to each other by gluing.
  • Flaps with flaps are here perpendicular to the rail and not parallel to the rail 11 as for the figure 1 .
  • the Figure 2A therefore shows the blank 3 (a little curled) before lowering the mandrel 15.
  • the panel 4 is supported on the rail 11 for example consisting of several parallel beams.
  • the Figure 2B shows the mandrel 15 lowered into the application position, the application face 18 compresses the panel 4 sandwiched with the bearing face formed by the rail 11.
  • edges 28 of the flaps 7 of the longitudinal side flaps 5 and 6 and the edges of the transverse flaps 8 and 9 are then in contact with the guide rails 13, or equivalent, allowing a precise configuration of the blank before any beginning of folding flaps for form the walls of the tray.
  • FIGS. 2A and 2B correspond to item 21 'and 21 "of the figure 1
  • the Figures 2C and 2D corresponding to the post 21 "'.
  • Figure 2C shows the raising of the transverse flaps 8 and 9 by means of vertical tongues 30 provided at their upper end of attacking portions 31 flared outwardly.
  • the flaps are glued to the outside of the transverse flaps.
  • the tongues 30 actuated by cylinder or cam for example of a width equal to 1/5 of the wall, are centered relative to the transverse flap 8, 9 they fall.
  • the applicators 32 are, in turn, formed by vertical plates 34 terminated at the top by one or two small rollers 35 of horizontal axis 36, perpendicular to the axis of the rail 11, arranged to attacking the outer face 37 of the transverse flap, and during the ascent of the plates, roll against them to bring it at the end of the race to the vertical.
  • the rollers then push in a horizontal movement the outer faces of the flaps 7 and apply said flaps against the outer faces of the transverse flaps thus completing the assembly of the tray.
  • the mandrel can then be raised, and the tray evacuated.
  • the figure 5 gives a perspective view of the machine 1 of the figure 1 by synthetically presenting the stages of formation of the plateau 2 at the two stations.
  • the plate is here formed in the direction perpendicular to the direction of formation described with reference to figures 2 , 3 and 4 .
  • Means 38 for example with a cam 39, are provided for vertically displacing the mandrel in a manner known per se, the assembly being fixed to a frame 40 which will have reduced dimensions, given the simplicity of the means used in the invention.
  • the figure 6 shows a device 41 according to another embodiment of the invention comprising means 42 for storing and unfolding blanks 2 in the treatment direction described with reference to FIGS. figures 2 , 3 and 4 , the transverse flaps 8, 9 being parallel to the rail 11 and having longitudinal flaps 43.
  • the blanks are arranged on the rail 11 between the guide rails 13 at the station 44, then after gluing the flaps 7, the transverse flaps 8, 9 and / or their longitudinal flaps 43, the blank 2 is moved to the training station 45 and then to the forming station 46 of the plateau 3, described with reference to FIG. figure 3 .
  • the invention indeed proposes an embodiment of manufacture of a plate which comprises a step of reattachment of two walls facing each other. , which allows, in particular, a better rigidity of the plate.
  • pressing members 48 provided for applying the flaps longitudinal 43 on the side transverse flaps 8, 9 adjacent.
  • the pressing members 48 comprise a longitudinal vertical plate 49 comprising a shoe 50 arranged to press the bottom panel 4 onto the bearing face at a distance 1 from the connecting line 51. with the corresponding transverse flap, and means 52 for folding and plating the longitudinal flap 43 comprising an application cylinder 53 arranged to fold said flap (cf. figure 8 ) on the adjacent flap.
  • the blank 2 is brought to the should of the embroidering station, and stopped by locking fingers and positioning 54 (cf. figure 7 ), a part 55 comprising a bracket 56 hooking the outer edge 57 of the longitudinal flap 43 is then at right and opposite said outer edge.
  • the embodiment of the mandrel is for example of the type described in the preamble, with a fixed edge 61 two integral edges 61 "and 61" 'movable relative to the first cylinder 62', and a fourth edge 61 "" movable relative to the two preceding ones by jack 62 ''.
  • Figures 13A to 13F an embodiment of another embodiment of a system 63 for folding the flaps 7 and flaps 5, 6, 8, 9 around the mandrel.
  • the system 63 comprises at each corner of the plate three support elements 64, 65, 66 formed by rollers of horizontal axes, integral with each other in the vertical direction, being fixed on a bracket 67 and arranged to successively push back flaps and flaps by first lifting the end flap 7 by the roller 64, ( Figures 13A to 13C ), then the longitudinal flap 5, (6) by the roller 65 ( figure 13D ) then, before the latter has finished his movement, ( Figures 13E, 13F ) by raising the transverse flap 8, 9, by the corresponding roller 66, the rollers 64 and 66 being of parallel axes slightly offset transversely, and the roller 65 being of axis perpendicular to the other two.
  • the blanks are unstacked one by one from a tank, in a manner known per se.
  • the blank is then stopped at the stitching station 45, then after rewinding brought to the forming station, where the retractable mandrel 61 forms the tray.
  • the application face of the mandrel for example formed by edge portions and / or a central plate, being of smaller size than the bottom of the plate, it is thus possible during the reading of the mandrel, to escape the forming ribs on the inside of the walls of the tray inside the volume of the latter.
  • the present invention is not limited to the embodiments more particularly described. On the contrary, it embraces all the variants and especially those where the bottom of the plate is not horizontal, but vertical, and the case where the mandrel is applied from below, those where the application face is of lower surface equal to half or three quarter of the surface of the bottom panel of the tray, the one or the additional retraction is automatically adjustable from a programming of the machine.

Landscapes

  • Making Paper Articles (AREA)
  • Laminated Bodies (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Adornments (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The device has support rails (11) on a part of surface of a base panel, and a vertical jack to apply a mandrel (15) on the rails. A folding unit folds rectangular longitudinal lateral shutters and related flaps on the mandrel. Glue spreading and pressing units fix the folded shutters and flaps with each other. Lateral guide rails block a blank when the panel is applied on the support rails by the mandrel. An independent claim is also included for a method of forming a plate from a blank of sheet material.

Description

La présente invention concerne une machine pour la formation d'un plateau à partir d'un flan de matière en feuille comportant un panneau de fond muni de volets latéraux formant les parois latérales du plateau.The present invention relates to a machine for forming a tray from a blank of sheet material having a bottom panel provided with side flaps forming the side walls of the tray.

Elle concerne également un procédé de formation d'un plateau à partir d'un tel flan.It also relates to a method of forming a tray from such a blank.

Elle trouve une application particulièrement importante bien que non exclusive dans le domaine des plateaux gerbables les uns sur les autres pour produit laitiers tels que des récipients pour yaourts en matière plastique fermés par des opercules et disposés en nappe de quatre ou huit pots reliés entre eux par leur partie supérieure.It finds a particularly important application although not exclusive in the field of stackable trays on each other for dairy products such as plastic yoghurt containers closed with lids and arranged in a sheet of four or eight pots interconnected by their upper part.

On connaît déjà des machines de formation de plateaux par emboutissage à l'aide d'un vérin à l'intérieur d'un puit, les rabats du plateau étant guidés par les parois latérales dudit puit lors de l'enfoncement.Tray forming machines are already known by stamping with a jack inside a well, the flaps of the plate being guided by the side walls of said well during the depression.

De tels dispositifs présentent des inconvénients notamment liés à l'imprécision au moment du formage pouvant provenir de la mauvaise disposition du flan sur l'orifice du puit. Il existe également des problèmes liés aux déformations du carton par exemple voilé du fait de l'humidité et/ou des différences de températures.Such devices have drawbacks particularly related to imprecision at the time of forming that may come from the improper layout of the blank on the hole of the well. There are also problems related to cardboard deformations for example veiled due to humidity and / or temperature differences.

Des problèmes liés aux fuites de colle engluant les parois du puit et/ou du mandrin existent également.Problems with glue leakage from the walls of the well and / or the chuck are also present.

On connaît également ( FR-A-2-554-417 ) une machine pour former un plateau d'emballage par plaquage externe des parois dudit plateau sur des butés rétractables solidaires d'une plaque de préhension d'un flan, ces butées permettant la mise en pression des parois à encoller. Mais un tel dispositif ne permet pas par exemple d'échapper des excroissances internes à un emballage, lors du largage du fond du plateau par la plaque de préhension.We also know ( FR-A-2-554-417 ) a machine for forming a packaging tray by external plating of the walls of said plate on retractable abutments integral with a gripping plate of a blank, these stops for pressurizing the walls to be glued. But such a device does not allow for example to escape internal growths in a package, during the release of the bottom of the plate by the gripping plate.

La présente invention vise à fournir un appareil ou machine répondant mieux que ceux antérieurement connus aux exigences de la pratique notamment en ce qu'elle évite les imprécisions dues à l'enfoncement d'un mandrin par piston à l'intérieur d'un puit entraînant le flan préalablement encollé.The present invention aims to provide an apparatus or machine better than those previously known to the requirements of practice in particular in that it avoids inaccuracies due to the driving of a mandrel by piston inside a well causing the previously glued blank.

Les autres inconvénients cités ci-avant peuvent de plus être évités, et ce pour un coût acceptable, et avec des cadences de fabrication qui sont supérieures à celles de l'art antérieur par exemple cinquante coups minute.The other disadvantages mentioned above can be further avoided, and for an acceptable cost, and with production rates that are greater than those of the prior art for example fifty minutes.

Avec l'invention on peut donc obtenir la formation de plateaux avec une grande précision permettant notamment de former des emballages parfaitement équerrés et/ou dans le cas où ils présenteraient une ouverture évasée avec des angles respectés de façon précise.With the invention can thus achieve the formation of trays with high precision including forming perfectly squared packages and / or in the case where they have a flared opening with precisely respected angles.

Dans ce but l'invention propose notamment une machine pour la formation d'un plateau à partir d'un flan de matière en feuille comportant un panneau de fond muni de volets latéraux comportant pour certains des rabats d'extrémité et formant les parois latérales du plateau, ladite machine comprenant les caractéristiques selon la revendication 1.For this purpose, the invention notably proposes a machine for forming a tray from a blank of sheet material comprising a bottom panel provided with lateral flaps, some of which include end flaps and forming the side walls of the blank. tray, said machine comprising the features of claim 1.

Dans des modes de réalisation avantageux, on a de plus recours à l'une et/ou à l'autre des dispositions suivantes :

  • le mandrin rétractable est formé par une armature comportant quatre arêtes perpendiculaires ou obliques par rapport à la face d'application, à savoir une première arête de référence, fixe, une deuxième et une troisième arêtes, solidairement mobiles par rapport à la première arête dans un premier plan perpendiculaire à la face d'appui et une quatrième arête solidairement mobile de la troisième arête dans un deuxième plan de paroi perpendiculaire au premier ;
  • le mandrin rétractable pour échappement est de plus configurable pour permettre par extension/rétractation supplémentaire, dissociable de la rétractation pour échappement, la formation de plateaux de dimensions différentes par ajustage des dimensions nominales de référence.
In advantageous embodiments, one and / or the other of the following provisions is also used:
  • the retractable mandrel is formed by an armature comprising four perpendicular or oblique edges with respect to the application face, namely a first reference edge, fixed, a second and a third edge, integrally movable relative to the first edge in a first plane perpendicular to the bearing face and a fourth solidarily movable edge of the third edge in a second wall plane perpendicular to the first;
  • the retractable mandrel for exhaust is further configurable to allow additional expansion / retraction, separable from the retraction for escape, forming trays of different dimensions by adjusting the nominal reference dimensions.

Avantageusement cette possibilité de rétractation supplémentaire se fait par vérins simples et/ou doubles par exemple hydrauliques ou électriques ;

  • les arêtes sont à coins coupés ;
  • le plateau comprend deux volets latéraux longitudinaux opposés respectivement munis de rabats d'extrémité et deux volets latéraux transversaux opposés comportant chacun un rabat longitudinal, la machine comportant de plus des encolleurs permettant de déposer des lignes d'adhésifs pendant l'amenée d'un flan sur lesdits volets transversaux et/ou les rabats longitudinaux et des organes presseurs prévus pour appliquer les rabats longitudinaux sur les volets latéraux transversaux adjacents pour former des rembordements ;
  • les organes presseurs comprennent au moins un plaqueur vertical longitudinal agencé pour plaquer le panneau de fond sur la face d'appui à une distance de la ligne de jonction avec le volet longitudinal correspondant, et des moyens de pliage et de plaquage du rabat longitudinal comprenant un organe d'application, comprenant par exemple un cylindre, agencé pour rabattre ledit rabat sur le volet adjacent ;
  • le mandrin comporte au moins une arête oblique ;
  • les deux volets latéraux transversaux opposés comportant un rembordement sur une partie de leur hauteur et étant respectivement munis d'évidements formant poignées situés en dessous desdits rembordements, le mandrin présente une section tronconique propre à former un plateau tronconique autorisant un encastrement au moins partiel dudit plateau dans un plateau inférieur lors d'un gerbage de l'un sur l'autre.
Advantageously this possibility of additional retraction is by simple cylinders and / or double for example hydraulic or electrical;
  • the edges are cut corners;
  • the plate comprises two opposite longitudinal side flaps respectively provided with end flaps and two opposite transverse side flaps, each comprising a longitudinal flap, the machine further comprising glueing devices for depositing lines of adhesives during the feeding of a blank on said transverse flaps and / or the longitudinal flaps and pressing members provided for applying the longitudinal flaps on the adjacent transverse side flaps to form overlaps;
  • the pressing members comprise at least one longitudinal vertical plate arranged to press the bottom panel on the bearing surface at a distance from the junction line with the corresponding longitudinal flap, and folding and plating means of the longitudinal flap comprising an applicator member, comprising for example a cylinder, arranged to fold down said flap on the adjacent flap;
  • the mandrel has at least one oblique edge;
  • the two opposite transverse lateral flaps having a rim on part of their height and being respectively provided with handles forming recesses below said rim, the mandrel has a frustoconical section adapted to form a frustoconical plate allowing at least a partial embedding said tray in a lower tray when stacking one on the other.

Elle propose également un procédé de formation d'un plateau à partir d'un flan de matière en feuilles comportant un panneau de fond muni de volets latéraux comportant pour certains des rabats d'extrémité et formant les parois latérales du plateau, en ce que ledit procédé comporte les étapes selon la revendication 9.It also proposes a method of forming a tray from a blank of sheet material comprising a bottom panel provided with side flaps, some of which have end flaps and forming the side walls of the tray, in that said method comprises the steps of claim 9.

Avantageusement le mandrin étant formé par une armature rétractable comportant quatre arêtes perpendiculaires ou obliques par rapport à la face d'application, après application dudit mandrin sur le panneau de fond et repliage des volets et rabats, on rétracte ledit mandrin de façon à éloigner les arêtes des parois du plateau formé et on écarte ledit mandrin du plateau pour permettre son évacuation latérale.Advantageously, the mandrel being formed by a retractable reinforcement having four perpendicular or oblique edges with respect to the application face, after application of said mandrel to the bottom panel and folding of the flaps and flaps, said mandrel is retracted so as to distance the edges walls of the formed plate and separates said mandrel from the plate to allow its lateral evacuation.

Dans un autre mode de réalisation avantageux chaque rabat est fixé sur la face externe de la paroi latérale transversale adjacente avec rembordement.In another advantageous embodiment each flap is fixed on the outer face of the adjacent transverse side wall with rim.

Egalement avantageusement le flan comprenant deux volets latéraux longitudinaux opposés respectivement munis de rabats d'extrémité et deux volets latéraux transversaux opposés comportant chacun un rabat longitudinal, avant formation du plateau, on encolle lesdits volets transversaux ou les rabats longitudinaux adjacents en déposant dessus des lignes d'adhésifs pendant l'amenée du flan,
et on presse les rabats longitudinaux sur les volets latéraux transversaux adjacents pour former des rembordements sur le flan à plat.Also advantageously the blank comprising two opposing longitudinal side flaps respectively provided with end flaps and two opposite transverse side flaps each comprising a longitudinal flap, before formation of the plate, said transverse flaps or adjacent longitudinal flaps are glued by depositing on the lines of the flaps. adhesives during the feeding of the blank,
and pressing the longitudinal flaps on the adjacent transverse side flaps to form laps on the flat blank.

L'invention sera mieux comprise à la lecture de la description qui suit de modes de réalisation donnés à titre d'exemples non limitatifs. La description se réfère aux dessins qui l'accompagnent dans lesquels :

  • La figure 1 est une vue schématique en perspective d'un dispositif selon le mode de réalisation de l'invention plus particulièrement décrit ici.
  • Les figures 2A à 2D sont des vues en coupe latérales en vis à vis du mandrin et du poste d'application du dispositif de la figure 1 lors des différentes étapes de formation d'un plateau disposé perpendiculairement au plateau de la figure 1.
  • La figure 3 est une vue en perspective du mandrin en place à l'intérieur du plateau au poste d'application de la figure 2.
  • La figure 4 est une vue latérale selon IV-IV de la figure 3.
  • La figure 5 est une vue en perspective du poste d'application de la figure 1.
  • La figure 6 est une vue en perspective schématique d'un dispositif selon un autre mode de réalisation de l'invention.
  • La figure 7 est une vue en perspective du poste de rembordement de la figure 6.
  • La figure 8 et les figures 9A à 9D montrent les étapes de rembordement du rabat selon le dispositif décrit en référence à la figure 6.
  • La figure 10 est une vue en perspective du poste d'application du dispositif selon la figure 6.
  • Les figures 11 et 12 montrent des vues agrandies de la partie d'application du plateau selon un autre mode de réalisation de l'invention.
  • Les figures 13A à 13F montrent les différentes étapes de pliage des volets et rabats permettant de former les parois latérales du plateau selon un mode de réalisation de l'invention plus particulièrement décrit ici.
  • Les figures 14A à 14D sont des vues schématiques montrant différents mode de réalisation de mandrin rétractables utilisables selon l'invention.
The invention will be better understood on reading the following description of embodiments given as non-limiting examples. The description refers to the accompanying drawings in which:
  • The figure 1 is a schematic perspective view of a device according to the embodiment of the invention more particularly described here.
  • The Figures 2A to 2D are views in lateral section opposite the mandrel and the application station of the device of the figure 1 during the different stages of formation of a plateau arranged perpendicular to the plateau of the figure 1 .
  • The figure 3 is a perspective view of the mandrel in place inside the tray at the application station of the figure 2 .
  • The figure 4 is a lateral view along IV-IV of the figure 3 .
  • The figure 5 is a perspective view of the application station of the figure 1 .
  • The figure 6 is a schematic perspective view of a device according to another embodiment of the invention.
  • The figure 7 is a perspective view of the re-boarding station of the figure 6 .
  • The figure 8 and the Figures 9A to 9D show the steps of flanging of the flap according to the device described with reference to the figure 6 .
  • The figure 10 is a perspective view of the application station of the device according to the figure 6 .
  • The Figures 11 and 12 show enlarged views of the tray application portion according to another embodiment of the invention.
  • The Figures 13A to 13F show the different folding steps flaps and flaps for forming the side walls of the tray according to an embodiment of the invention more particularly described here.
  • The Figures 14A to 14D are schematic views showing different embodiments of retractable mandrel usable according to the invention.

La figure 1 montre schématiquement et partiellement un dispositif ou machine 1 de formation d'un plateau 2 à partir d'un flan 3 de carton ondulé, par exemple double face de 2 ou 3 mm d'épaisseur, comprenant un panneau de fond 4 rectangulaire muni de volets latéraux, à savoir deux volets latéraux longitudinaux rectangulaires 5 et 6 muni chacun de part et d'autre de rabats d'extrémité 7 rectangulaire, et deux volets latéraux transversaux rectangulaires 8, 9 démunis de rabat, lesdits volets et rabats 5, 6, 7, 8 et 9 formant les parois latérales 10 du plateau 2.The figure 1 schematically and partially shows a device or machine 1 for forming a plate 2 from a blank 3 of corrugated cardboard, for example double-sided 2 or 3 mm thick, comprising a rectangular bottom panel 4 with shutters lateral, namely two rectangular longitudinal side flaps 5 and 6 each provided on either side of rectangular end flaps 7, and two rectangular transverse side flaps 8, 9 with no flap, said flaps and flaps 5, 6, 7 , 8 and 9 forming the side walls 10 of the plate 2.

La machine 1 comprend un système (non représenté) de préhension et de dépose des flans un par un de type connu, par ventouses, sur un rail 11 de support et de déplacement du flan ainsi déposé à plat sur ledit rail 11.The machine 1 comprises a system (not shown) for gripping and removing blanks one by one of known type, by suction cups, on a rail 11 for supporting and moving the blank thus laid flat on said rail 11.

Le déplacement du flan se fait ici encore de façon connue en elle-même, par exemple par le biais de doigts pousseurs, ou par rouleaux d'entraînement 12, des rails de guidage 13 latéraux parallèles au rail de support 11, permettant d'encadrer au départ sommairement, pour le guider, le flan de façon transversale.The displacement of the blank is here again in a manner known per se, for example by means of pusher fingers, or by drive rollers 12, lateral guide rails 13 parallel to the support rail 11, for framing initially, to guide it, the blank transversely.

A partir du poste de dépose le flan 3 est encollé (traits mixtes 14) sur ses volets et/ou rabats destinés à former les parois par collage, tout en étant déplacé pour mettre le panneau 4 à l'aplomb d'un mandrin 15 déplaçable verticalement (flèche 16) entre une position de retrait, et une position d'application grâce à des moyens 17 d'application par exemple comprenant un vérin vertical.From the dispensing station the blank 3 is glued (mixed lines 14) on its flaps and / or flaps intended to form the walls by gluing, while being moved to put the panel 4 in line with a movable mandrel 15 vertically (arrow 16) between a retracted position and an application position by means of application means 17 for example comprising a vertical jack.

Plus précisément, le mandrin 15 comporte une face d'application 18 du panneau 4 sur le rail 11 qui est agencé à cet endroit pour constituer une face d'appui 19 sur au moins une partie de la surface externe dudit panneau de fond.Specifically, the mandrel 15 has an application face 18 of the panel 4 on the rail 11 which is arranged at this location to form a bearing surface 19 on at least a portion of the outer surface of said bottom panel.

Pour ce faire, il suffit que la surface et/ou la largeur du rail soit suffisante pour permettre une répartition homogène de l'appui sur toute la longueur du panneau 4 et sur une largeur dudit panneau suffisante, par exemple 1/5 ou 1/3 de ladite largeur de façon centrée par rapport au flan.To do this, it suffices that the surface and / or the width of the rail is sufficient to allow a homogeneous distribution of the support over the entire length of the panel 4 and a width of said sufficient panel, for example 1/5 or 1 / 3 of said width centrally relative to the blank.

On sait que le carton ondulé est une matière parfois capricieuse, qui peut se gondoler et/ou vriller en fonction de la température, de l'humidité, et plus généralement des conditions de stockage.It is known that corrugated cardboard is a sometimes capricious material, which can curl and / or twist depending on the temperature, humidity, and more generally storage conditions.

Lorsqu'un flan aux dimensions et/ou à la déformation aléatoires, même si les différences par rapport à un flan parfait de référence peuvent être minimes, est placé sur le rail 11, il peut donc présenter des erreurs de positionnement par rapport à une position idéale de poinçonnement ultérieure, qui vont entraîner des malformations surtout lorsqu'une cadence de formation rapide des plateaux est nécessaire.When a blank with random dimensions and / or deformation, even if the differences with respect to a perfect reference blank can be minimal, is placed on the rail 11, it can therefore have positioning errors with respect to a position ideal later punching, which will cause malformations especially when a rate of rapid formation trays is necessary.

Ainsi, un flan 3 peut, comme représenté sur la figure 1 au poste de dépose, ne pas occuper toute la surface entre les deux rails de guidage 13 latéraux, entraînant des écartements d, d' des rails 13, qui vont se répercuter au niveau des lignes de pliage entre volets et panneau notamment.Thus, a blank 3 can, as shown on the figure 1 the deposition station, does not occupy the entire area between the two guide rails 13 side, resulting in spacings d, d 'of the rails 13, which will be reflected at the fold lines between components and in particular panel.

Avec le mode de réalisation de l'invention tel que décrit ici, toutes ces petites différences vont disparaître au moment de l'application du mandrin sur la face d'appui 19, qui en prenant le panneau central du flan en sandwich lui fait reprendre une position de référence exacte et horizontale, le flan venant alors naturellement en butée transversale contre les rails de guidage latéraux 13, et contre des taquets ou doigts escamotables 20 dans le sens longitudinal.With the embodiment of the invention as described here, all these small differences will disappear at the time of application of the mandrel on the bearing face 19, which taking the central panel of the sandwich blank makes it resume a exact reference position and horizontal, the blank then naturally in transverse abutment against the lateral guide rails 13, and against cleats or fingers retractable in the longitudinal direction.

On a représenté sur la figure 1 le poste 21 de descente du mandrin lors de trois étages de formation du plateau 2, à savoir 21' avant descente du mandrin, 21" lors du plaquage (le flan vient en butée latérale sur les rails , et en butée 12 longitudinale sur les doigts escamotables 20) et 21''' lors du pliage des volets latéraux et des rabats correspondants contre les faces, en vis à vis du mandrin, pour obtenir du plateau 2, évacué en 22.We have shown on the figure 1 the station 21 descent mandrel during three stages of formation of the plate 2, namely 21 'before lowering the mandrel, 21 "during plating (the blank comes into lateral abutment on the rails, and longitudinal stop 12 on the fingers retractable 20) and 21 '''when folding the side flaps and the corresponding flaps against the faces, facing the mandrel, to obtain the tray 2, discharged at 22.

Plus précisément, le mandrin comprend des faces latérales d'appui 23 définitées par des arêtes 24, la face d'application étant de la dimension du panneau de fond 4, et les arrêtes 24 coïncidant avec les lignes de pliage verticales 25 des coins du plateau ainsi formé autour du mandrin.More specifically, the mandrel comprises lateral bearing faces 23 defined by edges 24, the application face being of the size of the bottom panel 4, and the edges 24 coinciding with the vertical fold lines 25 of the corners of the plate thus formed around the mandrel.

Des moyens 26 par exemple comprenant des vérins 27 sont agencés pour rabattre les volets et rabats sur le mandrin, de façon connue en elle-même, et pour comprimer volets latéraux et rabats convenablement encollés au préalable, de façon à permettre la fixation des uns aux autres par collage.Means 26 for example comprising cylinders 27 are arranged to fold flaps and flaps on the mandrel, in a manner known per se, and for compress side flaps and flaps appropriately glued beforehand, so as to allow attachment to each other by gluing.

On a représenté sur les figures 2A à 2D, en coupe latérale, dans l'axe du rail 11, les étapes de formation du plateau telles que déjà décrites en référence au poste 21 (21', 21" et 21"'), mais avec des moyens de pliage différents et un flan identique mais disposé perpendiculairement au flan de la figureWe have shown on Figures 2A to 2D , in lateral section, in the axis of the rail 11, the stages of formation of the plate as already described with reference to station 21 (21 ', 21 "and 21"'), but with different folding means and a blank identical but arranged perpendicular to the blank of the figure

Les volets avec rabats sont donc ici perpendiculaires au rail et non parallèles au rail 11 comme pour la figure 1.Flaps with flaps are here perpendicular to the rail and not parallel to the rail 11 as for the figure 1 .

Par la suite on a utilisé les mêmes numéros de référence pour désigner les mêmes éléments ou des éléments similaires, s'il y a lieu.Subsequently, the same reference numbers have been used to designate the same elements or similar elements, if any.

La figure 2A montre donc le flan 3 (un peu gondolé) avant descente du mandrin 15. Le panneau 4 est en appui sur le rail 11 par exemple constitué de plusieurs poutrelles parallèles.The Figure 2A therefore shows the blank 3 (a little curled) before lowering the mandrel 15. The panel 4 is supported on the rail 11 for example consisting of several parallel beams.

La figure 2B montre le mandrin 15 descendu en position d'application, dont la face d'application 18 comprime le panneau 4 en sandwich avec la face d'appui formée par le rail 11.The Figure 2B shows the mandrel 15 lowered into the application position, the application face 18 compresses the panel 4 sandwiched with the bearing face formed by the rail 11.

Les bords 28 des rabats 7 des volets latéraux longitudinaux 5 et 6 et les bords des volets transversaux 8 et 9 sont alors en contact avec les rails de guidage 13, ou équivalents, permettant une configuration précise du flan avant tout commencement de repliage des volets pour former les parois du plateau.The edges 28 of the flaps 7 of the longitudinal side flaps 5 and 6 and the edges of the transverse flaps 8 and 9 are then in contact with the guide rails 13, or equivalent, allowing a precise configuration of the blank before any beginning of folding flaps for form the walls of the tray.

Les figures 2A et 2B correspondent au poste 21' et 21" de la figure 1, les figures 2C et 2D correspondant, quant à elles, au poste 21"'.The Figures 2A and 2B correspond to item 21 'and 21 "of the figure 1 , the Figures 2C and 2D corresponding to the post 21 "'.

Plus précisément, la figure 2C montre le relèvement des volets transversaux 8 et 9 par le biais de languettes 30 verticales munies à leur extrémité supérieure de portions d'attaque 31 évasées vers l'extérieur.More specifically, the Figure 2C shows the raising of the transverse flaps 8 and 9 by means of vertical tongues 30 provided at their upper end of attacking portions 31 flared outwardly.

Dans ce mode de réalisation, les rabats sont collés sur l'extérieur des volets transversaux.In this embodiment, the flaps are glued to the outside of the transverse flaps.

En figure 2D, les volets longitudinaux 5 et 6 sont repliés grâce à des applicateurs 32 à mouvement vertical, puis les rabats 7 sont relevés par des moyens à roues 33 qui permettent une pression des volets sur les faces externes des rabats préalablement encollées, les faces internes du mandrin exerçant alors une contre pression entraînant une excellente fixation.In 2D figure , the longitudinal flaps 5 and 6 are folded by means of applicators 32 with vertical movement, then the flaps 7 are raised by wheel means 33 which allow a pressure of the flaps on the outer faces of the previously glued flaps, the internal faces of the mandrel then exerting a counter pressure resulting in excellent fixation.

On a montré sur les figures 3 et 4, en perspective et en coupe le poste 21 d'application du mandrin sur le flan disposé comme en référence aux figures 2A à 2D pour former le plateau, à une plus grande échelle.We have shown on Figures 3 and 4 , in perspective and in section, the station 21 for applying the mandrel to the blank disposed as with reference to Figures 2A to 2D to form the plateau, on a larger scale.

Les moyens successifs de pliage des volets et rabats sur les faces du mandrin y sont plus apparents.The successive means of folding flaps and flaps on the faces of the mandrel are more apparent.

Les languettes 30, actionnées par vérin ou par came, par exemple de largeur égale au 1/5 de la paroi, sont centrées par rapport au volet transversal 8, 9 qu'elles relèvent.The tongues 30 actuated by cylinder or cam, for example of a width equal to 1/5 of the wall, are centered relative to the transverse flap 8, 9 they fall.

Les applicateurs 32 sont, quant à eux, formés par des plaques 34 verticales terminées en partie haute par un ou deux petits rouleaux 35 d'axe horizontal 36, perpendiculaires à l'axe du rail 11, agencés pour attaquer la face externe 37 du volet transversal, et lors de la remontée des plaques, rouler contre celles-ci pour l'amener en fin de course à la verticale.The applicators 32 are, in turn, formed by vertical plates 34 terminated at the top by one or two small rollers 35 of horizontal axis 36, perpendicular to the axis of the rail 11, arranged to attacking the outer face 37 of the transverse flap, and during the ascent of the plates, roll against them to bring it at the end of the race to the vertical.

Les rouleaux viennent alors repousser dans un mouvement horizontal les faces externes des rabats 7 et appliquer lesdits rabats contre les faces externes des volets transversaux terminant ainsi le montage du plateau.The rollers then push in a horizontal movement the outer faces of the flaps 7 and apply said flaps against the outer faces of the transverse flaps thus completing the assembly of the tray.

Le mandrin peut alors être relevé, et le plateau évacué.The mandrel can then be raised, and the tray evacuated.

La figure 5 donne une vue en perspective de la machine 1 de la figure 1 en présentant synthétiquement les étapes de formation du plateau 2 aux deux postes.The figure 5 gives a perspective view of the machine 1 of the figure 1 by synthetically presenting the stages of formation of the plateau 2 at the two stations.

Le plateau est ici formé dans le sens perpendiculaire au sens de formation décrit en référence aux figures 2, 3 et 4.The plate is here formed in the direction perpendicular to the direction of formation described with reference to figures 2 , 3 and 4 .

Des moyens 38, par exemple à came 39 sont prévus pour déplacer verticalement le mandrin de façon connue en elle-même, l'ensemble étant fixé à un châssis 40 qui va présenter des dimensions réduites compte tenu de la simplicité des moyens mis en oeuvre dans l'invention.Means 38, for example with a cam 39, are provided for vertically displacing the mandrel in a manner known per se, the assembly being fixed to a frame 40 which will have reduced dimensions, given the simplicity of the means used in the invention.

Il s'agit là d'un avantage supplémentaire de cette dernière.This is an added benefit of the latter.

La figure 6 montre un dispositif 41 selon un autre mode de réalisation de l'invention comportant des moyens 42 de stockage et de dépliage de flans 2 dans le sens de traitement décrit en référence aux figures 2, 3 et 4, les volets transversaux 8, 9 étant parallèles au rail 11 et comportant des rabats longitudinaux 43.The figure 6 shows a device 41 according to another embodiment of the invention comprising means 42 for storing and unfolding blanks 2 in the treatment direction described with reference to FIGS. figures 2 , 3 and 4 , the transverse flaps 8, 9 being parallel to the rail 11 and having longitudinal flaps 43.

Les flans sont disposés sur le rail 11 entre les rails de guidage 13 au poste 44, puis après encollage des rabats 7, des volets transversaux 8, 9 et/ou de leurs rabats longitudinaux 43, on déplace le flan 2 au poste 45 de formation des rembordements, puis au poste 46 de formage du plateau 3, décrit en référence à la figure 3.The blanks are arranged on the rail 11 between the guide rails 13 at the station 44, then after gluing the flaps 7, the transverse flaps 8, 9 and / or their longitudinal flaps 43, the blank 2 is moved to the training station 45 and then to the forming station 46 of the plateau 3, described with reference to FIG. figure 3 .

On va maintenant décrire plus précisément le poste 45 en référence aux figures 6, 7, 8 et 9A à 9D.We will now describe more precisely item 45 with reference to figures 6 , 7 , 8 and 9A to 9D .

En particulier lorsque le carton est à grammage léger ou extrêmement léger, par exemple 3x100 g ou moins, l'invention propose en effet un mode de réalisation de fabrication d'un plateau qui comporte une étape de rembordement de deux des parois en vis à vis, ce qui permet notamment, une meilleure rigidité du plateau.In particular when the paperboard is light weight or extremely lightweight, for example 3x100 g or less, the invention indeed proposes an embodiment of manufacture of a plate which comprises a step of reattachment of two walls facing each other. , which allows, in particular, a better rigidity of the plate.

Pour ce faire, il est prévu, en plus des moyens encolleurs 47 permettant de déposer des lignes d'adhésif pendant l'amenée d'un flan sur lesdits volets transversaux et/ou les rabats longitudinaux, des organes presseurs 48 prévus pour appliquer les rabats longitudinaux 43 sur les volets latéraux transversaux 8, 9 adjacents.To do this, it is provided, in addition to gluing means 47 for depositing lines of adhesive during the supply of a blank on said transverse flaps and / or longitudinal flaps, pressing members 48 provided for applying the flaps longitudinal 43 on the side transverse flaps 8, 9 adjacent.

Dans le mode de réalisation décrit ici en référence aux figures, les organes presseurs 48 comprennent un plaqueur vertical longitudinal 49 comportant un sabot 50 agencé pour plaquer le panneau de fond 4 sur la face d'appui à une distance 1 de la ligne de jonction 51 avec le volet transversal correspondant, et des moyens 52 de pliage et de plaquage du rabat longitudinal 43 comprenant un cylindre 53 d'application agencé pour rabattre ledit rabat (cf. figure 8) sur le volet adjacent.In the embodiment described here with reference to the figures, the pressing members 48 comprise a longitudinal vertical plate 49 comprising a shoe 50 arranged to press the bottom panel 4 onto the bearing face at a distance 1 from the connecting line 51. with the corresponding transverse flap, and means 52 for folding and plating the longitudinal flap 43 comprising an application cylinder 53 arranged to fold said flap (cf. figure 8 ) on the adjacent flap.

On a montré sur les figures 9A à 9D les étapes du procédé de rembordement.We have shown on Figures 9A to 9D the steps of the embossing process.

Le flan 2 étant amené au doit du poste de rembordement, et arrêté par des doigts de blocage et de positionnement 54 (cf. figure 7), une pièce 55 comprenant une équerre 56 d'accrochage du bord externe 57 du rabat longitudinal 43 se trouve alors au droit et en vis à vis dudit bord externe.The blank 2 is brought to the should of the embroidering station, and stopped by locking fingers and positioning 54 (cf. figure 7 ), a part 55 comprising a bracket 56 hooking the outer edge 57 of the longitudinal flap 43 is then at right and opposite said outer edge.

On descend alors le sabot 50 du plaqueur 49.Then down the shoe 50 of the plate 49.

Par un mouvement de rotation autour d'un axe 58 et de déploiement transversal selon la flèche 59, la pièce 55, soulève le rabat longitudinal 43, le plaqueur 49 retenant le fond du panneau 4 sur le rail 11.By a rotational movement about an axis 58 and transverse deployment along the arrow 59, the piece 55 raises the longitudinal flap 43, the plate 49 holding the bottom of the panel 4 on the rail 11.

Lorsque la pièce 55 atteint une position déterminée, l'extrémité 60 de l'équerre 56 échappe le bord externe du rabat 43 et le cylindre 53 prend la relève, en écrasant le rabat jusqu'à obtenir la position d'application totale de la figure 9D.When the piece 55 reaches a determined position, the end 60 of the bracket 56 escapes the outer edge of the flap 43 and the cylinder 53 takes over, crushing the flap to obtain the full application position of the Figure 9D .

Les mouvements se font simultanément de part et d'autre, les deux rabats longitudinaux étant alors collés sur les volets transversaux adjacents formant ainsi les rembordementsThe movements are done simultaneously on both sides, the two longitudinal flaps being then glued on the adjacent transverse flaps thus forming the rim

On a représenté sur les figures 10 à 12 le poste de formation du plateau avec rembordements qui se présente de façon identique à celui décrit en référence aux figures 2, 3 et 4, seul le mandrin 61 étant un peu différent, dans la mesure où il est rétractable pour permettre aux arêtes et aux faces du mandrin lors du son extraction, d'échapper les rembordements, lesdites faces du mandrin étant quant à elles avec des ressauts pour autoriser une bonne contre pression.We have shown on Figures 10 to 12 the training station of the tray with ruffles which presents itself in a manner identical to that described with reference to the figures 2 , 3 and 4 , only the mandrel 61 is a little different, insofar as it is retractable to allow the edges and the faces of the mandrel during its extraction, to escape the overlaps, said faces of the mandrel being for their part with projections to allow a good counter pressure.

Le mode de constitution du mandrin est par exemple du type décrit en préambule, avec une arête fixe 61 deux arêtes solidaires 61" et 61" ' mobiles par rapport à la première par vérin 62', et une quatrième arête 61" " mobile par rapport aux deux précédentes par vérin 62' ' .The embodiment of the mandrel is for example of the type described in the preamble, with a fixed edge 61 two integral edges 61 "and 61" 'movable relative to the first cylinder 62', and a fourth edge 61 "" movable relative to the two preceding ones by jack 62 ''.

On a représenté plus précisément en référence aux figures 13A à 13F un mode de réalisation d'un autre mode de réalisation d'un système 63 de repliage des rabats 7 et volets 5, 6, 8, 9 autour du mandrin.More specifically, reference is made to Figures 13A to 13F an embodiment of another embodiment of a system 63 for folding the flaps 7 and flaps 5, 6, 8, 9 around the mandrel.

Le système 63 comporte à chaque coin du plateau trois éléments d'appuis 64, 65, 66 formés par des rouleaux d' axes horizontaux, solidaires entre eux dans le sens vertical, en étant fixés sur une cornière 67 et agencés pour repousser successivement rabats et volets en soulevant tout d'abord le rabat d'extrémité 7 par le rouleau 64, (figures 13A à 13C), puis le volet longitudinal 5, (6) par le rouleau 65 (figure 13D) puis, avant que ce dernier n'ait terminé son mouvement, (figures 13E, 13F) en soulevant le volet transversal 8, 9, par le rouleau 66 correspondant, les rouleaux 64 et 66 étant d'axes parallèles légèrement décalés transversalement, et le rouleau 65 étant d'axe perpendiculaire aux deux autres.The system 63 comprises at each corner of the plate three support elements 64, 65, 66 formed by rollers of horizontal axes, integral with each other in the vertical direction, being fixed on a bracket 67 and arranged to successively push back flaps and flaps by first lifting the end flap 7 by the roller 64, ( Figures 13A to 13C ), then the longitudinal flap 5, (6) by the roller 65 ( figure 13D ) then, before the latter has finished his movement, ( Figures 13E, 13F ) by raising the transverse flap 8, 9, by the corresponding roller 66, the rollers 64 and 66 being of parallel axes slightly offset transversely, and the roller 65 being of axis perpendicular to the other two.

On a représenté schématiquement sur les figures 14A à 14D des exemples de mandrins rétractables 70, 71, 72, 73 dont les arêtes présentent de formes différentes, i.e. rectangulaires (figure 14A), trapézoïdales dans un sens ou dans l'autre (figures 14B à 14D), ce qui permet de conformer une ou plusieurs parois d'un même plateau de façon évasée, vers l'intérieur, ou vers l'extérieur du plateau.Diagrammatically on the Figures 14A to 14D examples of retractable mandrels 70, 71, 72, 73 whose edges have different shapes, ie rectangular ( figure 14A ), trapezoidal in one direction or the other ( Figures 14B to 14D ), which makes it possible to shape one or more walls of the same plate in a flared manner, towards the inside or towards the outside of the plate.

On va maintenant décrire le fonctionnement du dispositif 41 en référence à la figure 6.We will now describe the operation of the device 41 with reference to the figure 6 .

Les flans sont dépilés un par un à partir d'un réservoir, de façon connue en elle-même.The blanks are unstacked one by one from a tank, in a manner known per se.

Ils sont alors placés sur le rail 11 d'appui et de déplacement en vis à vis des encolleurs 47 qui dépassent les lignes de colle aux emplacements prévus.They are then placed on the rail 11 of support and movement opposite the glue 47 which exceed the lines of glue at the locations provided.

Le flan est ensuite arrêté au poste de rembordement 45, puis après rembordement amené au poste de formage, où le mandrin retractable 61, forme le plateau.The blank is then stopped at the stitching station 45, then after rewinding brought to the forming station, where the retractable mandrel 61 forms the tray.

Pour ce faire, il descend écarté, en position de formage, volets et rabats sont ensuite repliés pour permettre le collage des parois, puis le mandrin se rétracte pour se dégager franchement des parois et se relève, afin de libérer le plateau qui est évacué.To do this, it goes down spaced, forming position, flaps and flaps are then folded to allow the bonding of the walls, then the mandrel retracts to clear the walls and stands up, to release the tray that is evacuated.

La face d'application du mandrin, par exemple formée par des parties d'arêtes et/ou une plaque centrale, étant de dimension inférieure au fond du plateau, il est ainsi possible lors du relevé du mandrin, d'échapper les rembordements formant excroissance sur la face interne des parois du plateau à l'intérieur du volume de ce dernier.The application face of the mandrel, for example formed by edge portions and / or a central plate, being of smaller size than the bottom of the plate, it is thus possible during the reading of the mandrel, to escape the forming ribs on the inside of the walls of the tray inside the volume of the latter.

Comme il va de soi et comme il résulte également de ce qui précède, la présente invention n'est pas limitée aux modes de réalisation plus particulièrement décrits. Elle en embrasse au contraire toutes les variantes et notamment celles où le fond du plateau n'est pas horizontal, mais vertical, et le cas où le mandrin est appliqué par le dessous, celles où la face d'application est de surface inférieure égale à la moitié ou au trois quart de la surface du panneau de fond du plateau, celle ou la rétractation supplémentaire est ajustable en automatique à partir d'une programmation de la machine.As is obvious and as also follows from the above, the present invention is not limited to the embodiments more particularly described. On the contrary, it embraces all the variants and especially those where the bottom of the plate is not horizontal, but vertical, and the case where the mandrel is applied from below, those where the application face is of lower surface equal to half or three quarter of the surface of the bottom panel of the tray, the one or the additional retraction is automatically adjustable from a programming of the machine.

Claims (13)

  1. A machine (1) for forming a tray (2) from a blank (3) of sheet material comprising a base panel (4) provided with side flaps (5, 6, 8, 9), which form the side walls (10) of the tray and some of which comprise end tabs (7), said machine comprising:
    - a support face (11, 19) over at least part of the surface of said base panel,
    - a block (15) comprising an application face (18) for applying the panel to said support face and lateral faces (23) retractable between a first, tray-forming position and a second position for withdrawal of the block from the tray, allowing complete disengagement of the walls of the tray and its application face,
    - means (17) for applying said block to said support face,
    - means (26) for folding up the side flaps and the corresponding tabs against the opposing faces of said block and
    - means (47, 48) for fixing to one another said flaps and tabs folded up in this way, characterised in that the retractable side faces are defined by edges (24), the block (15) and its side faces (23) being arranged so that the edges (24) of the block coincide with the vertical fold lines (25) of the corners of the tray in the first position,
    in that the machine comprises longitudinal and lateral stop means (13, 20) for the blank when the base panel is applied to the support face by the block,
    and in that, the means for folding up the side flaps comprise, at each corner of the tray, three support elements (64, 65, 66) integral with each other in the vertical direction, said elements being arranged to push up the opposing flaps and tabs in succession between a flat position and a position in which the flaps and tabs are fixed to one another to form the corresponding corner of the tray.
  2. A machine according to claim 1, characterised in that the block, which is retractable for withdrawal, is additionally configurable to allow, by supplementary extension/retraction separable from retraction for withdrawal, the formation of trays of different dimensions, by adjusting the nominal reference dimensions.
  3. A machine according to any one of the preceding claims, characterised in that the retractable block (15) is formed by an armature comprising four edges perpendicular or oblique relative to the application face, namely a first, fixed, reference edge (61'), a second and a third edges (61'', 61'''), integrally mobile relative to the first edge in a first plane perpendicular to the support face and a fourth edge (61'''') integrally mobile with the third edge in a second wall plane perpendicular to the first.
  4. A machine according to any one of the preceding claims, characterised in that the edges have corner cuts.
  5. A machine according to any one of the preceding claims, characterised in that, with the tray comprising two opposing longitudinal side flaps (5, 6) respectively provided with end tabs (7) and two opposing transverse side flaps (8, 9) each comprising a longitudinal tab, it additionally comprises glue spreaders (47) allowing the deposition of lines of adhesive during feed of a blank to said transverse flaps and/or the longitudinal tabs and pressing members (48) provided for applying the longitudinal tabs to the adjacent side flaps to form double layers.
  6. A machine according to claim 5; characterised in that the pressing members (48) comprise at least one longitudinal vertical clamping member (49) arranged for clamping the base panel to the support face at a distance from the join line with the corresponding transverse panel, and means (52) for folding and clamping down the longitudinal tab (43), comprising an application cylinder (53) arranged for folding said flap over onto the adjacent panel.
  7. A machine according to any one of the preceding claims, characterised in that the block comprises at least one oblique edge.
  8. A machine according to claim 7, characterised in that, with the two opposing transverse flaps (8, 9) comprising a double layer (43) over part of their height and being respectively provided with holes forming handles situated below said double layers, the block has a frustoconical section suitable for forming a frustoconical tray enabling at least partial nesting of said tray in a lower tray in the event of stacking one on top of another.
  9. A method of forming a tray (2) from a blank (3) of sheet material, using a machine according to any one of the preceding claims, the blank comprising a base panel (4) provided with side flaps (5, 6), which form the side walls of the tray and some of which comprise end tabs (7), said method comprising the following steps:
    - placing at least part of the surface of said base panel on a support face (19) of a machine (1) for forming said blank,
    - clamping a retractable block (15) comprising a panel application face (18) onto said support face, said support face comprising longitudinal and lateral stop means (13, 20) for the blank, so as to bring the blank into contact with said stops,
    - folding up the side flaps and the corresponding tabs against the opposing faces of said block (15) and
    - fixing together said flaps and tabs thus folded up by adhesive bonding,
    characterised in that, the block (15) being formed by a retractable armature comprising four edges which are perpendicular or oblique relative to the application face,
    after application of said block to the base panel and folding up of the flaps and tabs, to make the edges (24) of the block coincide with the vertical fold lines (25) of the tray,
    retracting said block, the application face of which has smaller dimensions than those of the base panel, so as to remove the edges of the walls from the formed tray and to allow disengagement of the walls of the tray and its application face, and spacing said block from the tray to allow its extraction.
  10. A method according to claim 9, characterised in that the block is configured, by supplementary extension/retraction separable from retraction for withdrawal, to allow the formation of trays of different dimensions by adjusting the nominal reference dimensions.
  11. A method according to either one of claims 9 and 10, characterised in that each tab (7) is fixed to the outer face of the adjacent transverse side wall with double layer.
  12. A method according to any of claims 9 to 11, characterised in that, with the blank (3) comprising two opposing longitudinal side flaps respectively provided with end tabs and two opposing transverse side flaps each comprising a longitudinal tab, before formation of the tray, said transverse flaps or the adjacent longitudinal tabs are glued by depositing lines of adhesive thereon during feed of the blank,
    and the longitudinal tabs are pressed onto the adjacent transverse side flaps to form double layers on the flat blank.
  13. A method according to claim 12, characterised in that, to apply pressure to the longitudinal tabs (43), the base panel is clamped vertically onto the support face with a pressing member (48) at a distance from the join lines with the corresponding transverse flaps towards the inside of the blank, then said longitudinal tabs are folded and clamped to stick them to the adjacent flaps.
EP05717602A 2004-02-10 2005-02-10 Machine and method for forming a plate by applying a mandrel Not-in-force EP1725393B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05717602T PL1725393T3 (en) 2004-02-10 2005-02-10 Machine and method for forming a plate by applying a mandrel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0401280A FR2865961B1 (en) 2004-02-10 2004-02-10 MACHINE AND METHOD FOR FORMATION OF A TRAY BY APPLICATION OF A CHUCK
PCT/FR2005/000305 WO2005077647A2 (en) 2004-02-10 2005-02-10 Machine and method for forming a plate by applying a mandrel

Publications (2)

Publication Number Publication Date
EP1725393A2 EP1725393A2 (en) 2006-11-29
EP1725393B1 true EP1725393B1 (en) 2011-04-06

Family

ID=34778637

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05717602A Not-in-force EP1725393B1 (en) 2004-02-10 2005-02-10 Machine and method for forming a plate by applying a mandrel

Country Status (11)

Country Link
EP (1) EP1725393B1 (en)
AT (1) ATE504428T1 (en)
AU (1) AU2005211967B2 (en)
DE (1) DE602005027327D1 (en)
ES (1) ES2364148T3 (en)
FR (1) FR2865961B1 (en)
NZ (1) NZ549763A (en)
PL (1) PL1725393T3 (en)
PT (1) PT1725393E (en)
WO (1) WO2005077647A2 (en)
ZA (1) ZA200607536B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106493999B (en) * 2016-10-11 2018-10-12 歌尔股份有限公司 Paper card bending device and its bending method
CN109986838A (en) * 2019-04-26 2019-07-09 许昌裕同印刷包装有限公司 A kind of automatic envelope paper device of packing box
IT202100025991A1 (en) * 2021-10-11 2023-04-11 Panotec Srl ASSEMBLY AND METHOD FOR AUTOMATED BENDING OF CORNERS OF A BOX

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2957395A (en) * 1956-10-09 1960-10-25 Louis A Meyer Box forming machine
US2977861A (en) * 1958-05-20 1961-04-04 Continental Can Co Carton making machine
US3513757A (en) * 1967-07-14 1970-05-26 Owens Illinois Inc Manufacture of open-topped trays
DE1786114A1 (en) * 1968-08-20 1972-01-27 Wilhelm Idel Device for folding blanks
FR2554417A1 (en) * 1983-11-08 1985-05-10 Bello Jean Pierre MACHINE FOR FORMING PACKING TRAYS AND PACKAGING PLATES THUS OBTAINED
US4926615A (en) * 1986-11-12 1990-05-22 Alexander Packaging Equipment Pty. Ltd. Machine for forming cartons and packaging goods therein
IT1221926B (en) * 1987-07-01 1990-08-23 Bruno Corali MACHINE FOR THE MANUFACTURE OF CONTAINERS MADE WITH A SHEET IN FOLDABLE MATERIAL, SUCH AS CARDBOARD, WOOD AND SIMILAR
FR2708517B1 (en) * 1993-08-05 1995-10-27 Creation Tech Automatic folding table with modular elements.
DE19636262A1 (en) * 1996-09-06 1998-03-12 Ligmatech Maschb Gmbh Folding machine and method for automatically folding a folding box
DE19905867A1 (en) * 1999-02-12 2000-08-17 Altonaer Wellpappenfab Gmbh Packing for holding drinks, for example, has half-folding box rectangular in cross section and open at bottom, with flaps at top for folding over, and tray to accommodate box and provided with holding surface with end and side flaps

Also Published As

Publication number Publication date
DE602005027327D1 (en) 2011-05-19
AU2005211967A1 (en) 2005-08-25
WO2005077647A3 (en) 2005-11-24
ATE504428T1 (en) 2011-04-15
PT1725393E (en) 2011-07-04
FR2865961A1 (en) 2005-08-12
ES2364148T3 (en) 2011-08-25
NZ549763A (en) 2010-03-26
PL1725393T3 (en) 2012-01-31
AU2005211967B2 (en) 2011-05-19
FR2865961B1 (en) 2009-02-06
WO2005077647A2 (en) 2005-08-25
ZA200607536B (en) 2010-06-30
EP1725393A2 (en) 2006-11-29

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