EP3526024B1 - Method and device for shaping a blank around a mandrel - Google Patents

Method and device for shaping a blank around a mandrel Download PDF

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Publication number
EP3526024B1
EP3526024B1 EP17792122.8A EP17792122A EP3526024B1 EP 3526024 B1 EP3526024 B1 EP 3526024B1 EP 17792122 A EP17792122 A EP 17792122A EP 3526024 B1 EP3526024 B1 EP 3526024B1
Authority
EP
European Patent Office
Prior art keywords
mandrel
blank
panels
box
flaps
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
EP17792122.8A
Other languages
German (de)
French (fr)
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EP3526024A1 (en
Inventor
Didier Desertot
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.)
DS Smith Packaging France SAS
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DS Smith Packaging France SAS
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Filing date
Publication date
Application filed by DS Smith Packaging France SAS filed Critical DS Smith Packaging France SAS
Publication of EP3526024A1 publication Critical patent/EP3526024A1/en
Application granted granted Critical
Publication of EP3526024B1 publication Critical patent/EP3526024B1/en
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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
    • B31B50/26—Folding sheets, blanks or webs
    • B31B50/28—Folding sheets, blanks or webs around mandrels, e.g. for forming bottoms
    • B31B50/282—Folding sheets, blanks or webs around mandrels, e.g. for forming bottoms involving stripping-off formed boxes from mandrels
    • 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
    • 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
    • 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
    • B31B2100/00—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs
    • B31B2100/002—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs characterised by the shape of the blank from which they are formed
    • B31B2100/0022—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs characterised by the shape of the blank from which they are formed made from tubular webs or blanks, including by tube or bottom forming operations
    • 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
    • B31B50/02—Feeding or positioning sheets, blanks or webs
    • B31B50/04—Feeding sheets or blanks
    • B31B50/06—Feeding sheets or blanks from stacks
    • 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
    • B31B50/02—Feeding or positioning sheets, blanks or webs
    • B31B50/04—Feeding sheets or blanks
    • B31B50/07—Feeding sheets or blanks by air pressure or suction

Definitions

  • the present invention relates to a device for shaping a blank of sheet material around a mandrel, in order to obtain a box or part of a box with a polygonal section.
  • It also relates to a method of shaping a blank of sheet material.
  • This blank conventionally comprises a series of at least three flaps, namely two end flaps located on either side of at least one intermediate flap, said flaps being connected to each other by parallel fold lines and provided with side flaps connected respectively to said flaps by fold lines perpendicular to the fold lines connecting said flaps, the free edge of one of the end flaps being provided with a tongue connected to said end flap by a fold line parallel to the fold lines connecting said shutters.
  • the blank has three flaps, it makes it possible to obtain part of a box (lid or bottom). When it has at least four parts, it makes it possible to obtain a box.
  • an adhesive is deposited on the one hand, on two side flaps and on the other hand, on said tab of an end flap or near the free edge of the end flap opposite to said tab.
  • the flaps are wound around a mandrel with a polygonal section, the outer cross section of which corresponds to the inner cross section of the box to be obtained, the tongue is fixed against the free edge of the other end flap resting on the face top of the mandrel, and the flaps on the same side of said flaps are folded against a corresponding end face of the mandrel and then fixed to each other.
  • This invention finds a particularly important, although not exclusive, application in the field of reinforced corrugated cardboard boxes.
  • the shaping of the blank around the mandrel is carried out using a mobile unit capable of moving in translation, perpendicular to the plane of the blank, and comprising stops and articulated arms for winding the flaps and the tongue. around the mandrel, as well as actuators integral with the frame.
  • the object of the invention is to alleviate these drawbacks by proposing a device and a method for shaping a blank of sheet material around a mandrel making it possible to carry out this shaping with great precision, while being d 'a simplified design and / or implementation.
  • Part of a box is in particular a cover or a base.
  • the invention also relates to a method of shaping a blank of sheet material around a mandrel to obtain a box or part of a box with a polygonal section, said blank comprising a series of at least three flaps, with namely two end flaps on either side of at least one intermediate flap, said flaps being connected to each other by parallel fold lines and provided with side flaps, respectively connected to said flaps by fold lines perpendicular to the fold lines connecting said flaps, the free edge of one of the end flaps being provided with a tongue connected to said end flap by a fold line parallel to the fold lines connecting said flaps, method implementing a device provided with a frame and in which the blank being previously glued at a gluing station of the device, the flaps are wound around a mandrel with a polygonal section, the outer cross section of which corresponds to the inner cross section of the box or of the box part to be obtained, the tab is fixed against the free edge of the other end flap resting on the upper face of the mandrel, the
  • the invention also relates to a machine for forming a box or part of a box.
  • polygonal section comprising a gluing station in which a blank of sheet material, comprising a set of flaps connected to each other by parallel fold lines and provided with side flaps, respectively connected to said flaps by fold lines perpendicular to the fold lines connecting said flaps, the free edge of one of the end flaps of said set of flaps being provided with a tongue connected to said end flap by a fold line parallel to the fold lines connecting said flaps, is glued at least with one hand on two side flaps and on the other hand on the tongue of an end flap or near the free edge of the end flap opposite said tongue and a forming station comprising the shaping device as described above.
  • the invention also relates to a method of forming a box or part of a box with a polygonal section from a blank comprising a set of flaps connected to each other by parallel fold lines and provided with side flaps. , respectively connected to said flaps by fold lines perpendicular to the fold lines connecting said flaps, in which the blank is glued in a gluing station and then shaped around a mandrel by implementing the shaping process described above.
  • the invention finally relates to a method of successive automatic forming of boxes or parts of boxes implementing a method of forming a box or part of a box according to the invention, in which forms the blank n - 1 during the sizing of the blank n.
  • the figure 1 shows a blank 1 made of double-sided corrugated cardboard, for example of low weight ( ⁇ 250 g / m2), for example 3 mm thick, intended to form a box.
  • first fold lines parallel to each other, namely a first central or reference fold line 8, two first lateral fold lines 9 and 10, and a first end fold line 11, junction with the tongue 7.
  • Flaps 3 and 6 are called end flaps and flaps 4 and 5, intermediate flaps.
  • the blank comprises, in a manner known in itself, a first set 12 of rectangular or substantially rectangular flaps 13 connected to the main flaps by second fold lines 14 perpendicular to the first and suitable for forming the top of the box after filling and a second set 15 of rectangular or substantially rectangular flaps 16a to 16d also connected to the main flaps by second fold lines 14 and suitable for forming the bottom of the box.
  • the method and the device according to the invention can also use variants of the blank illustrated at figure 1 and in particular a blank comprising rectangular main shutters interconnected by rectangular secondary shutters.
  • figures 2 to 5 describe a machine for forming a box with a polygonal section from the blank illustrated in figure 1 , this machine comprising a sizing device according to the embodiment of the invention more particularly described here, in particular with reference to the other figures.
  • This machine 20 comprises a frame or structure 21 forming a platform supporting independent subassemblies or modules, assembled to form a box from the blank illustrated in figure 1 .
  • These modules can be manufactured independently and then mounted on the frame 22.
  • the frame 21 provides the connection between the two end modules, namely the storage-unstacking module 30 and the extraction module 60.
  • an electrical cabinet may be provided which comprises a programmable controller for controlling the machine, known in itself.
  • the first storage-unstacking module 30 comprises a storage magazine 31 in the semi-vertical position of the blanks 1 to be formed.
  • This comprises two modular chains 32 driven by a system 33, comprising for example an asynchronous motor.
  • the chains 32 are for example coupled to a freewheel 34 and make it possible to maintain a blank ready to be fed in the front part 36.
  • the blanks are stored with the printed side facing the outside of the machine and the tab of the blank located on the right side of the machine in the direction of travel of the blanks.
  • This module 30 also includes means 35 (cf. figure 3 ) unstacking blanks 1 from the store 31.
  • the gluing module 40 comprises a gluing device with a flat support 41, such as a table, intended to receive a blank 1.
  • a flat support 41 such as a table
  • cleats 410 are provided which are fixed relative to the table, ensuring the positioning of the blank.
  • the gluing device also comprises a system of articulated arms 42 supporting a nozzle 420 positioned above the support.
  • the forming module 50 comprises a mandrel 51, that is to say a forming tool, around which the blank previously glued by the sizing device will be formed.
  • transfer means 43 comprising a system of articulated arms, located under the table 41 and capable of gripping a blank from below by means of aspiration.
  • the forming module 50 (cf. figure 4 ) for its part comprises two nacelles 52, 53, integral with the frame 21 and arranged on either side of the mandrel 51, transversely and symmetrically with respect to the direction of supply of the blank from the gluing station.
  • These nacelles comprise, in the example illustrated on the figures 2 to 5 , the means for winding the shutters and the means for fixing the tongue.
  • the extraction module 60 comprises an extraction station for extracting a box or part of a box with a polygonal section from the mandrel 51 where it has been formed, thanks to an extraction device 61, an evacuation station comprising the two conveyors 62, 63 as well as a station for transferring boxes or parts of boxes from the extraction station to the discharge station.
  • the forming module 50 will now be described in more detail with regard to figures 6 to 14 .
  • the figure 6 illustrates the mandrel 51 and the blank 1, previously glued at the gluing station 40.
  • the mandrel and the blank are here illustrated transversely to the direction of circulation of the blanks in the machine 20 and seen from the rear of the machine.
  • the tongue 7 is located on the right according to the direction of movement of the blank 1 inside the machine 20 and on the left on the figure 6 .
  • lines of adhesive have been deposited near the free edge of the shutter 3, as well as on the flaps 16a and 16c. These lines of adhesive have been applied to the upper face of the blank which is illustrated on figure 1 .
  • This upper face is the one facing the mandrel 51 on the figure 6 and it is opposite to the lower face which is the printed face of the blank.
  • the invention is not limited to this mode of implementation.
  • the lines of adhesive could be deposited on the lower face of the blank, that is to say the one facing the table 41, the printed side of the blank then constituting its upper face.
  • the blank 1 is moved from the gluing station 40 to under the mandrel 51 by transfer means 43 comprising a system of articulated arms.
  • the invention is not limited to this mode of implementation and the blank 1 could be moved from the gluing station 40 to the forming station 50 by conventional means moving linearly.
  • the figure 6 therefore illustrates the blank 1 after its positioning under the mandrel 51 thanks to the transfer means 43 and its recovery and its maintenance by support means 54 and 55, located under the mandrel 51 and on which the blank 1 bears by its face lower, when the means 43 have left the forming station to return to the gluing station.
  • these support means are in contact with at least part of the surface of the intermediate flap 5 and of the end flap 3.
  • Other solutions for supporting and / or maintaining the blank 1 can be envisaged without going beyond the scope of the present invention.
  • the figure 6 shows that the support means 54 located under the mandrel comprise two side blocks 540 and 541 and an intermediate support 542.
  • the mandrel 51 comprises an application face 510, intended to be facing the blank 1, an upper face 511, opposite the application face 510 on which the main flap 3 will be pressed, thus as side faces 512 and 513, on which the main flaps 4 and 6 will be wound, and an end face 514 on which the side flaps 16a to 16d will be folded.
  • the faces of the mandrel can be formed by plates or even by angle brackets, in a manner known per se.
  • the mandrel 51 has edges with cut corners so that the secondary flaps form the bevelled angles of the box obtained after forming.
  • the mandrel 51 is movable between a retracted position illustrated on figure 6 and a forming position, shown in figure 7 .
  • the distance between the application face 510 of the mandrel and its opposite face 511 is less than the width of the box which will be obtained from the blank 1.
  • This retracted position allows the transfer means 43 to pass the blank 1 between the application face 510 of the mandrel and the support means 54 and 55.
  • the outer cross section of the mandrel corresponds to the inner cross section of the box which will be obtained from the blank 1 and the face application 510 is in contact with the upper face of the blank 1.
  • the distance between the application face 510 and the opposite face 511 of the mandrel is adjustable, by means of suitable means such as jacks 515.
  • suitable means such as jacks 515.
  • the invention is however not limited to this embodiment and variants could be considered without departing from its framework.
  • side blocks 540, 541 are positioned facing the mandrel so that their outer face 5400, 5410 is substantially in line with a lateral face 512, 513 of the mandrel 51.
  • these two nacelles are integral with the frame 21 of the machine and are arranged on either side of the mandrel (not shown in FIG. figure 8 ), transversely and symmetrically with respect to the direction of supply of the blank from the gluing station.
  • the direction in which the blanks are fed inside the machine 20 is illustrated by the arrow F on the figure 8 .
  • the nacelle 52 is located on the side of the tongue 7 of a blank positioned under the mandrel, while the nacelle 53 will be positioned under shutters 3 and 4.
  • Each nacelle 52, 53 comprises a system of articulated arms 56, 57 produced identically.
  • this system of articulated arms 56, 57 comprises a pair of main arms 560, 570 interconnected by two axes 561, 571 and 562, 572.
  • These two axes 561, 562 and 571, 572 are spaced from one another and extend substantially longitudinally, that is to say in the direction of movement of the blanks in the machine 20.
  • Each main arm 560, 570 supports an intermediate arm 563, 573.
  • the two intermediate arms 563, 573 are, at one of their ends, mounted movable in rotation about the axis 562, 572 common to the two main arms 560, 570.
  • the intermediate arms 563, 573 are mounted to be able to rotate on an axis 564, 574 common to two secondary arms 565, 575.
  • the links 566, 576, respectively 567, 577 each double the main arms 560, 570, respectively each of the secondary arms 565, 575.
  • the end of the secondary arms 565, 575 and of the links 567, 577, opposite the intermediate arms 563, 573, is provided with support means 568, 578 for a side plate 521, 531 which has a sliding surface 522, 532.
  • These two sliding surfaces extend in a longitudinal plane, substantially parallel to the side faces 512 and 513 of the mandrel and perpendicular to the blank 1, when it is positioned under the mandrel 51. They are designed to ensure the winding of the shutter 6, 4 and its plating against the mandrel 51.
  • nacelles are designed to support all means allowing the formation of the box.
  • the nacelle 52 supports means 523 for breaking and folding the tab 7 around the fold line 11 and means 524 for securing the shutter 3 on the tab 7, once folded.
  • the means 523 are provided near the upper part 5220 of the sliding surface. They can be formed of an actuator having the shape of a comb with three teeth, each of them being able to pass through an orifice 5230.
  • the means 524 comprise two arms 5240 (second articulated arm) substantially parallel and having a general L shape.
  • These two arms 5240 are mounted in rotation on the side plate 521, around a common axis 5241 which extends substantially longitudinally, by the free end of the first branch of the L.
  • this axis 5241 is located at the rear of the side plate, relative to the sliding surface 522.
  • the arms 5240 support a plate 5242 which extends substantially perpendicular to the second branch of the L formed by the arms 5240.
  • the nacelle 52 also supports an articulated arm 525, located downstream of the folding means 523, in the direction of circulation of the blanks illustrated by the arrow F.
  • This articulated arm 525 is intended to fold the side flap 16a (in the upper position) against the end face 514 of the mandrel 51, in cooperation with the arm 534 of the nacelle 53 which will be described later.
  • the nacelle 53 for its part supports an assembly 533 for winding the main flap 4 around the mandrel.
  • This assembly comprises two arms 5330 which are substantially parallel and mounted in rotation about a common axis 5331 which is substantially longitudinal.
  • This axis 5331 is located substantially at the upper end 5320 of the sliding surface 532 of the side plate 531, opposite the support means 578.
  • the arms 5330 (first articulated arm) support a plate 5332.
  • the nacelle 53 also supports an articulated arm 534 which is intended to fold down the side flap 16a (in the upper position and opposite the flap 16c) on the end face 514 of the mandrel 51, in cooperation with the arm 525 of the nacelle 52.
  • This articulated arm is located downstream of the winding means 533 with respect to the direction of movement. blanks, represented by the arrow F. It is located substantially opposite the arm 525 of the nacelle 52.
  • each nacelle 52, 53 comprises means 526, 536 facing each other for folding the side flaps 16d and 16c, on the end face 514 of the mandrel.
  • These means 526, 536 can consist of a finger capable of passing through a lumen, 5260, 5360 and actuated by a set of three actuators controlled according to the size of the flaps 16d and 16c.
  • FIG 9 represents the nacelle 53, side view.
  • This figure 9 illustrates the side plate 531 which supports the plate 5332 and the arm 534.
  • the figure 9 shows the folding means 536 and their actuating means.
  • the nacelle 52 comprises means for driving the articulated arm system 56 which is similar.
  • the motors associated with each of these articulated arm systems are controlled so that the two articulated arm systems 56, 57 are driven by the same movement, when the shutters are wound on the mandrel.
  • the figure 10 illustrates the relative position of mandrel 51 and blank 1 before forming begins.
  • EP 0 334 707 which describes a method in which the winding of the blank begins while its plating against the mandrel has not been carried out.
  • the flap 5 is therefore in contact with the application face 510, while the flap 6 extends on the side of the nacelle 52 and the flaps 3 and 4 on the side of the nacelle 53.
  • the figure 11 illustrates an intermediate position between the folded position of the figure 10 and the deployed position of the figure 12 .
  • the upper part 5220 of the sliding surface 522 is in contact with the lower (printed) face of the shutter 6.
  • the movement of the sliding surface 522 causes the shutter 6 to be wound around the mandrel and its folding. around the fold line 10.
  • the upper part 5320 of the sliding surface 532 is in contact with the shutter 4, while the plate 5332 of the assembly 533 is in contact with the lower face of the shutter 3.
  • the movement of the sliding surface 532 makes it possible to wind the shutter 4 around the mandrel and to fold it around the fold line 8, the plate 5332 making it possible to keep the shutter 3 in the extension of the shutter 4.
  • the shutter 6 is pressed against the lateral surface 512 of the mandrel, thanks to the sliding surface 522.
  • the folding means 523 are actuated to fold the tongue 7, around the fold line 11. It is then in contact with the upper face 511 of the mandrel.
  • the sliding surface 532 of the nacelle 53 presses the shutter 4 against the lateral face 513 of the mandrel.
  • the 5330 arms rotate in counterclockwise around axis 5331 to fold flap 3 around fold line 9.
  • the folding means 526, 536 are actuated, so as to fold the side flaps 16d and 16b around the fold lines 14 to press them against the end face 514 of the mandrel.
  • the arms 525 and 534 are then actuated to fold the top flap 16a against the side flaps 16b and 16d already folded, by folding around the fold line 14.
  • the figure 14 illustrates the next step during which the movement of rotation of the arms 5240 continues around the axis 5241, so that the plate 5242 bears on the shutter 3 and secures it on the tongue 7, by pressing, thanks to to the adhesive present near the free edge of the shutter 3.
  • the folding means 523 would then not be actuated until after the assembly 533.
  • the flap 3 would be pressed first against the upper face 511 of the mandrel and then the tongue 7 would be folded around the fold line 11, thanks to the means 523.
  • the arms 5240 would be actuated so as to press the tongue 7 against the flap 3 to ensure their fixing by virtue of the adhesive present on the tongue.
  • the nacelle 53 can begin its movement towards the folded position.
  • the nacelle 52 will also begin its movement towards the folded position and the two nacelles 52 and 53 will then be in the folded position illustrated in figure 10 , the arms 5240 having tilted backwards, thanks to a movement of rotation in the anti-clockwise direction around the axis 5241.
  • the forming of a new blank around the mandrel 51 can then take place.
  • Means are also provided for folding the flap 16c around the fold line 14 and for fixing it against the flaps 16b and 16d already folded against the end face 514 of the mandrel.
  • all the means ensuring the shaping of the blank around the mandrel, the fixing of the tongue against the free edge of the end flap opposite the tongue and the folding of at least two flaps located on the same side of the flaps against one face end of the mandrel are carried by the nacelles 52, 53 and in particular by the side plates 521, 531.
  • the device according to the invention therefore does not require any adjustment to ensure its correct operation.
  • the fixing of the flaps 16a and 16c, provided with adhesive on their upper face, on the flaps 16b and 16d previously folded on the end face 514 of the mandrel ensures a fixing of the set of the four side flaps which is more solid than when the adhesive is present on the underside of the side flaps 16b and 16d and the flaps 16a and 16c are folded over them.
  • a first blank 1 is extracted and it is tilted horizontally.
  • lines of adhesive are deposited on at least two side flaps 16c and 16a, on the upper face of the blank, the lower face constituting the printed face of the blank.
  • the blank is then transferred from the gluing station to the forming station and, during this transfer, a line of adhesive is deposited near the free edge of the shutter 3 or on the tongue 7.
  • the blank 1 being positioned under the mandrel, it is wound around the mandrel, here by means of the two pods 52 and 53 described above.
  • the flap 3 is glued to the tongue 7 and the side flaps 16a and 16c are glued to the flaps 16b and 16d to form the bottom of the box on the end face 510 of the mandrel. The latter is turned towards the extraction module 60.
  • the latter extracts, by any suitable means, the box thus formed from the mandrel 51, so as to deposit it on one or other of the conveyors 62 or 63.
  • this method is implemented within the framework of a successive and automatic forming of boxes or parts of boxes, such that the blank n is glued during the forming of the blank n - 1.
  • the present invention is not limited to the embodiments more particularly described. On the contrary, it encompasses all the variants thereof and in particular those where the means for moving the blank under the mandrel are formed by a belt integral with the means for positioning the blank precisely for gluing.

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Description

La présente invention concerne un dispositif de mise en forme d'un flan de matière en feuille autour d'un mandrin, pour obtenir une boîte ou partie de boîte à section polygonale.The present invention relates to a device for shaping a blank of sheet material around a mandrel, in order to obtain a box or part of a box with a polygonal section.

Elle concerne également un procédé de mise en forme d'un flan de matière en feuille.It also relates to a method of shaping a blank of sheet material.

Ce flan comporte classiquement une suite d'au moins trois volets, à savoir deux volets extrêmes situés de part et d'autre d'au moins un volet intermédiaire, lesdits volets étant reliés les uns aux autres par des lignes de pliage parallèles et pourvus de rabats latéraux, reliés respectivement auxdits volets par des lignes de pliage perpendiculaires aux lignes de pliage reliant lesdits volets, le bord libre d'un des volets extrêmes étant pourvu d'une languette reliée audit volet extrême par une ligne de pliage parallèle aux lignes de pliage reliant lesdits volets.This blank conventionally comprises a series of at least three flaps, namely two end flaps located on either side of at least one intermediate flap, said flaps being connected to each other by parallel fold lines and provided with side flaps connected respectively to said flaps by fold lines perpendicular to the fold lines connecting said flaps, the free edge of one of the end flaps being provided with a tongue connected to said end flap by a fold line parallel to the fold lines connecting said shutters.

Lorsque le flan comporte trois volets, il permet d'obtenir une partie d'une boîte (couvercle ou fond). Lorsqu'il comporte au moins quatre volets, il permet d'obtenir une boîte.When the blank has three flaps, it makes it possible to obtain part of a box (lid or bottom). When it has at least four parts, it makes it possible to obtain a box.

Pour permettre l'obtention d'une boîte ou d'une partie d'une boîte, un adhésif est déposé d'une part, sur deux rabats latéraux et d'autre part, sur ladite languette d'un volet extrême ou à proximité du bord libre du volet extrême opposé à ladite languette.To enable a box or part of a box to be obtained, an adhesive is deposited on the one hand, on two side flaps and on the other hand, on said tab of an end flap or near the free edge of the end flap opposite to said tab.

Ensuite, les volets sont enroulés autour d'un mandrin à section polygonale dont la section transversale extérieure correspond à la section transversale intérieure de la boîte à obtenir, la languette est fixée contre le bord libre de l'autre volet extrême en appui sur la face supérieure du mandrin, et les rabats se trouvant du même côté desdits volets sont repliés contre une face d'extrémité correspondante du mandrin puis fixés les uns aux autres.Then, the flaps are wound around a mandrel with a polygonal section, the outer cross section of which corresponds to the inner cross section of the box to be obtained, the tongue is fixed against the free edge of the other end flap resting on the face top of the mandrel, and the flaps on the same side of said flaps are folded against a corresponding end face of the mandrel and then fixed to each other.

Cette invention trouve une application particulièrement importante bien que non exclusive dans le domaine des boîtes renforcées en carton ondulé.This invention finds a particularly important, although not exclusive, application in the field of reinforced corrugated cardboard boxes.

On connait déjà de nombreux procédés et dispositifs de mise en forme d'un flan autour d'un mandrin.Numerous methods and devices are already known for shaping a blank around a mandrel.

On peut notamment citer le document EP 0 334 707 qui décrit un procédé et un dispositif consistant à prélever successivement les flans dans un magasin et à les déposer sur une table munie de doigts d'entrainement. Ces derniers font glisser le flan sur la table pour l'amener sous le mandrin. Pendant le transfert vers le mandrin, le flan rencontre des encolleurs disposés au-dessus et au-dessous de la table qui déposent des lignes d'adhésif sur le flan.We can cite in particular the document EP 0 334 707 which describes a method and a device consisting in successively removing the blanks in a store and depositing them on a table provided with drive fingers. They slide the blank on the table to bring it under the mandrel. During transfer to the mandrel, the blank encounters glueers disposed above and below the table which deposit lines of adhesive on the blank.

La mise en forme du flan autour du mandrin est réalisée à l'aide d'un équipage mobile susceptible de se déplacer en translation, perpendiculairement au plan du flan, et comprenant des butées et des bras articulés pour enrouler les volets et la languette autour du mandrin, ainsi que d'actionneurs solidaires du bâti.The shaping of the blank around the mandrel is carried out using a mobile unit capable of moving in translation, perpendicular to the plane of the blank, and comprising stops and articulated arms for winding the flaps and the tongue. around the mandrel, as well as actuators integral with the frame.

La fixation de la languette contre le bord libre du volet extrême opposé à la languette, le repliement des rabats se trouvant du même côté des volets contre une face d'extrémité correspondante du mandrin et la fixation les uns aux autres des rabats repliés sont réalisés par un bras articulé et des vérins également solidaires du bâti.The fixing of the tongue against the free edge of the end flap opposite the tongue, the folding of the flaps located on the same side of the flaps against a corresponding end face of the mandrel and the fixing to each other of the folded flaps are carried out by an articulated arm and jacks also integral with the frame.

De nombreuses variantes de ce dispositif ont été proposées et elles apportent globalement satisfaction, voir par exemple WO96/04129 .Numerous variants of this device have been proposed and they are generally satisfactory, see for example WO96 / 04129 .

Ces dispositifs présentent néanmoins des inconvénients car ils nécessitent tous l'intervention de nombreux dispositifs indépendants des uns des autres qui doivent donc être réglés de manière précise pour pouvoir assurer une mise en forme correcte du flan et qui entrainent également un encombrement important.These devices nevertheless have drawbacks because they all require the intervention of numerous devices independent of each other which must therefore be adjusted in a precise manner in order to be able to ensure correct shaping of the blank and which also entail a considerable bulk.

L'invention a pour objet de pallier ces inconvénients en proposant un dispositif et un procédé de mise en forme d'un flan de matière en feuille autour d'un mandrin permettant de réaliser cette mise en forme avec une grande précision, tout en étant d'une conception et/ou d'une mise en œuvre simplifiée.The object of the invention is to alleviate these drawbacks by proposing a device and a method for shaping a blank of sheet material around a mandrel making it possible to carry out this shaping with great precision, while being d 'a simplified design and / or implementation.

Dans ce but, l'invention propose notamment un dispositif de mise en forme d'un flan de matière en feuille autour d'un mandrin, pour obtenir une boîte ou une partie de boîte à section polygonale, ledit flan comportant une suite d'au moins trois volets, à savoir deux volets extrêmes de part et d'autre d'au moins un volet intermédiaire, lesdits volets étant reliés les uns aux autres par des lignes de pliage parallèles et pourvus de rabats latéraux, reliés respectivement auxdits volets par des lignes de pliage perpendiculaires aux lignes de pliage reliant lesdits volets, le bord libre d'un des volets extrêmes étant pourvu d'une languette reliée audit volet extrême par une ligne de pliage parallèle aux lignes de pliage reliant lesdits volets, ledit flan étant préalablement encollé dans un poste d'encollage d'une part sur deux rabats et d'autre part, sur la languette du volet extrême ou à proximité du bord libre du volet extrême opposé à ladite languette, le dispositif comprenant :

  • un bâti,
  • un mandrin à section polygonale dont la section transversale extérieure correspond à la section transversale intérieure de la boîte ou partie de boîte à obtenir,
  • des moyens d'enroulement des volets et de la languette autour du mandrin,
  • des moyens de fixation de la languette contre le bord libre du volet extrême opposé à la languette,
  • des moyens de repliement des rabats se trouvant du même côté desdits volets contre une face d'extrémité correspondante du mandrin et,
  • des moyens pour fixer les uns aux autres les rabats ainsi repliés,
caractérisé en ce que les moyens d'enroulement des volets et les moyens de fixation de la languette sont supportés par deux nacelles solidaires du bâti du dispositif et disposées de part et d'autre du mandrin, transversalement et de façon symétrique par rapport à la direction d'amenée du flan depuis le poste d'encollage.To this end, the invention proposes in particular a device for shaping a blank of sheet material around a mandrel, in order to obtain a box or part of a box with a polygonal section, said blank comprising a series of minus three shutters, to namely two end flaps on either side of at least one intermediate flap, said flaps being connected to each other by parallel fold lines and provided with side flaps, respectively connected to said flaps by fold lines perpendicular to the lines folding connecting said flaps, the free edge of one of the end flaps being provided with a tongue connected to said end flap by a fold line parallel to the fold lines connecting said flaps, said blank being previously glued in a gluing station on the one hand on two flaps and on the other hand, on the tongue of the end flap or near the free edge of the end flap opposite said tongue, the device comprising:
  • a frame,
  • a mandrel with a polygonal section, the outer cross section of which corresponds to the inner cross section of the box or part of the box to be obtained,
  • means for winding the flaps and the tongue around the mandrel,
  • means for fixing the tongue against the free edge of the end flap opposite the tongue,
  • means for folding the flaps located on the same side of said flaps against a corresponding end face of the mandrel and,
  • means for fixing the folded flaps to one another,
characterized in that the means for winding the flaps and the means for fixing the tongue are supported by two nacelles integral with the frame of the device and arranged on either side of the mandrel, transversely and symmetrically with respect to the direction of supply of the blank from the gluing station.

Une partie de boîte est notamment un couvercle ou un fond.Part of a box is in particular a cover or a base.

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

  • les moyens d'enroulement de chaque nacelle comprennent des moyens munis d'une surface de glissement pour rabattre un volet du flan sur l'une de deux faces latérales opposées du mandrin et respectivement, pour l'une des nacelles, des moyens pour rabattre un volet et pour l'autre nacelle, des moyens pour replier la languette autour de l'arête de la face supérieure du mandrin, les nacelles comprenant chacune un système articulé pour déplacer verticalement et transversalement les moyens d'enroulement ;
  • les moyens pour rabattre un volet comprennent un premier bras articulé, monté mobile en rotation sur les moyens munis d'une surface de glissement ;
  • l'autre nacelle supporte également les moyens de fixation de la languette, ces moyens comportant un deuxième bras articulé monté en rotation sur les moyens munis d'une surface de glissement de ladite nacelle et muni de moyens de compression de la languette contre le bord libre du volet extrême en vis à vis ;
  • au moins une partie des moyens de repliement des rabats est également supportée par les deux nacelles ;
  • le dispositif comprend des moyens de support ou de maintien d'au moins une partie de la surface d'un volet intermédiaire du flan et le mandrin comprend une face d'application dudit volet intermédiaire sur les moyens de support ou de maintien, des faces latérales et une face supérieure opposée à la face d'application ;
  • le mandrin est mobile entre une première position de formage de la boîte ou partie de boîte, dans laquelle sa section transversale extérieure correspond à la section transversale intérieure de la boîte ou partie de boîte à obtenir et une deuxième position rétractée dans laquelle la distance entre la face d'application du mandrin et sa face opposée est inférieure à la largeur de la boîte ou partie de boîte à obtenir ;
  • la distance entre la face d'application et la face opposée du mandrin est réglable ;
  • les arêtes du mandrin sont à coins coupés.
In advantageous embodiments, moreover and / or additionally recourse is had to one and / or other of the following provisions:
  • the winding means of each nacelle comprise means provided with a sliding surface for folding a flap of the blank onto one of two opposite side faces of the mandrel and respectively, for one of the nacelles, means for folding back a flap and for the other nacelle, means for folding the tongue around the edge of the upper face of the mandrel, the nacelles each comprising an articulated system for vertically and transversely moving the winding means;
  • the means for folding down a shutter comprise a first articulated arm, mounted movably in rotation on the means provided with a sliding surface;
  • the other nacelle also supports the means for fixing the tongue, these means comprising a second articulated arm rotatably mounted on the means provided with a sliding surface of said nacelle and provided with means for compressing the tongue against the free edge of the extreme shutter opposite;
  • at least part of the means for folding the flaps is also supported by the two pods;
  • the device comprises means for supporting or retaining at least part of the surface of an intermediate flap of the blank and the mandrel comprises an application face of said intermediate flap on the support or retaining means, of the side faces and an upper face opposite the application face;
  • the mandrel is movable between a first position for forming the can or part of a can, in which its outer cross section corresponds to the inner cross section of the can or part of a can to be obtained, and a second retracted position in which the distance between the application face of the mandrel and its opposite face is less than the width of the box or part of the box to be obtained;
  • the distance between the application face and the opposite face of the mandrel is adjustable;
  • the edges of the mandrel are cut corners.

L'invention concerne également un procédé de mise en forme d'un flan de matière en feuille autour d'un mandrin pour obtenir une boîte ou une partie de boîte à section polygonale, ledit flan comportant une suite d'au moins trois volets, à savoir deux volets extrêmes de part et d'autre d'au moins un volet intermédiaire, lesdits volets étant reliés les uns aux autres par des lignes de pliage parallèles et pourvus de rabats latéraux, reliés respectivement auxdits volets par des lignes de pliage perpendiculaires aux lignes de pliage reliant lesdits volets, le bord libre d'un des volets extrêmes étant pourvu d'une languette reliée audit volet extrême par une ligne de pliage parallèle aux lignes de pliage reliant lesdits volets, procédé mettant en œuvre un dispositif muni d'un bâti et dans lequel le flan étant préalablement encollé à un poste d'encollage du dispositif, les volets sont enroulés autour d'un mandrin à section polygonale dont la section transversale extérieure correspond à la section transversale intérieure de la boîte ou de la partie de boîte à obtenir, la languette est fixée contre le bord libre de l'autre volet extrême en appui sur la face supérieure du mandrin, les rabats se trouvant du même côté desdits volets sont repliés contre une face d'extrémité correspondante du mandrin puis fixés les uns aux autres, caractérisé en ce que l'enroulement des volets et de la languette ainsi que la fixation de ladite languette résultent de mouvements de translation et de rotation effectués par des moyens supportés par deux nacelles solidaires du bâti du dispositif de formage, disposées de part et d'autre du mandrin, transversalement et de façon symétrique par rapport à la direction d'amenée du flan depuis le poste d'encollage.The invention also relates to a method of shaping a blank of sheet material around a mandrel to obtain a box or part of a box with a polygonal section, said blank comprising a series of at least three flaps, with namely two end flaps on either side of at least one intermediate flap, said flaps being connected to each other by parallel fold lines and provided with side flaps, respectively connected to said flaps by fold lines perpendicular to the fold lines connecting said flaps, the free edge of one of the end flaps being provided with a tongue connected to said end flap by a fold line parallel to the fold lines connecting said flaps, method implementing a device provided with a frame and in which the blank being previously glued at a gluing station of the device, the flaps are wound around a mandrel with a polygonal section, the outer cross section of which corresponds to the inner cross section of the box or of the box part to be obtained, the tab is fixed against the free edge of the other end flap resting on the upper face of the mandrel, the flaps located on the same side of said flaps are folded against a face of 'corresponding end of the mandrel and then fixed to each other, characterized in that the winding of the flaps and of the tongue as well as the fixing of said tongue result of translational and rotational movements carried out by means supported by two nacelles integral with the frame of the forming device, arranged on either side of the mandrel, transversely and symmetrically with respect to the direction of supply of the blank from the gluing station.

De manière avantageuse, on a par ailleurs et/ou de plus recours à l'une et/ou à l'autre des dispositions suivantes :

  • les repliements d'au moins une partie des rabats est également effectué à partir de moyens supportés par les nacelles ;
  • le mandrin comprend une face d'application du volet intermédiaire sur des moyens de support ou de maintien de la machine de formage pour au moins une partie de la surface du volet intermédiaire, le mandrin étant dans une position rétractée, dans laquelle la distance entre la face d'application du volet intermédiaire et la face supérieure opposée du mandrin est inférieure à la largeur de la boîte ou partie de boîte à obtenir, lorsque le flan provenant du poste d'encollage est positionné sous le mandrin, et dans une position de formage, dans laquelle la section transversale extérieure du mandrin correspond à la section transversale intérieure de la boîte ou partie de la boîte à obtenir, une fois le volet intermédiaire sur les moyens de support ou de maintien, pour presser ledit volet intermédiaire sur les moyens de support ou de maintien au moyen de la face d'application du mandrin.
  • le flan est amené depuis le poste d'encollage sous le mandrin par un mouvement de translation de direction parallèle aux lignes de pliage entre les volets du flan, le mandrin étant disposé à poste fixe ;
  • le flan est solidarisé par aspiration avec les moyens assurant son mouvement de translation pour assurer son positionnement précis sous le mandrin.
Advantageously, one and / or the other of the following provisions is moreover and / or in addition:
  • the folding of at least part of the flaps is also carried out using means supported by the pods;
  • the mandrel comprises an application face of the intermediate flap on means for supporting or holding the forming machine for at least part of the surface of the intermediate flap, the mandrel being in a retracted position, in which the distance between the application face of the intermediate flap and the opposite upper face of the mandrel is less than the width of the box or part of the box to be obtained, when the blank from the gluing station is positioned under the mandrel, and in a forming position , wherein the outer cross section of the mandrel corresponds to the inner cross section of the box or part of the box to be obtained, once the intermediate flap on the support or holding means, to press said intermediate flap on the support means or holding by means of the application face of the mandrel.
  • the blank is brought from the gluing station under the mandrel by a translational movement in direction parallel to the fold lines between the flaps of the blank, the mandrel being placed at a fixed station;
  • the blank is secured by suction with the means ensuring its translational movement to ensure its precise positioning under the mandrel.

L'invention concerne également une machine de formation d'une boîte ou d'une partie de boîte à section polygonale comprenant un poste d'encollage dans lequel un flan de matière en feuille, comportant un ensemble de volets reliés les uns aux autres par des lignes de pliage parallèles et pourvus de rabats latéraux, reliés respectivement auxdits volets par des lignes de pliage perpendiculaires aux lignes de pliage reliant lesdits volets, le bord libre d'un des volets extrêmes dudit ensemble de volets étant pourvu d'une languette reliée audit volet extrême par une ligne de pliage parallèle aux lignes de pliage reliant lesdits volets, est encollé au moins d'une part sur deux rabats latéraux et d'autre part sur de la languette d'un volet extrême ou à proximité du bord libre du volet extrême opposé à ladite languette et un poste de formage comprenant le dispositif de mise en forme tel que décrit précédemment.The invention also relates to a machine for forming a box or part of a box. polygonal section comprising a gluing station in which a blank of sheet material, comprising a set of flaps connected to each other by parallel fold lines and provided with side flaps, respectively connected to said flaps by fold lines perpendicular to the fold lines connecting said flaps, the free edge of one of the end flaps of said set of flaps being provided with a tongue connected to said end flap by a fold line parallel to the fold lines connecting said flaps, is glued at least with one hand on two side flaps and on the other hand on the tongue of an end flap or near the free edge of the end flap opposite said tongue and a forming station comprising the shaping device as described above.

L'invention concerne aussi un procédé de formation d'une boîte ou d'une partie de boîte à section polygonale à partir d'un flan comportant un ensemble de volets reliés les uns aux autres par des lignes de pliage parallèles et pourvus de rabats latéraux, reliés respectivement auxdits volets par des lignes de pliage perpendiculaires aux lignes de pliage reliant lesdits volets, dans lequel le flan est encollé dans un poste d'encollage puis mis en forme autour d'un mandrin en mettant en œuvre le procédé de mise en forme décrit ci-dessus.The invention also relates to a method of forming a box or part of a box with a polygonal section from a blank comprising a set of flaps connected to each other by parallel fold lines and provided with side flaps. , respectively connected to said flaps by fold lines perpendicular to the fold lines connecting said flaps, in which the blank is glued in a gluing station and then shaped around a mandrel by implementing the shaping process described above.

L'invention concerne enfin un procédé de formage successif automatique de boîtes ou de parties de boîtes mettant en œuvre un procédé de formation d'une boîte ou partie de boîte selon l'invention, dans lequel on forme le flan n - 1 pendant l'encollage du flan n.The invention finally relates to a method of successive automatic forming of boxes or parts of boxes implementing a method of forming a box or part of a box according to the invention, in which forms the blank n - 1 during the sizing of the blank n.

L'invention sera mieux comprise et ses avantages apparaitront plus clairement 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 montre en vue de dessus un mode de réalisation d'un flan utilisable avec le procédé et le dispositif d'encollage selon l'invention.
  • La figure 2 est une vue en perspective d'une machine de formation d'une boîte à section polygonale, à partir du flan illustré à la figure 1, incluant un dispositif d'encollage selon l'invention.
  • La figure 3 est une vue de côté en coupe longitudinale de la machine illustrée à la figure 2, plus précisément du côté droit de la machine dans le sens d'acheminement des flans.
  • Les figures 4 et 5 sont des vues de dessus de la machine illustrée à la figure 2, la figure 5 différant de la figure 4 en ce qu'elle représente également des flans en cours de traitement sur la machine.
  • La figure 6 est une vue transversale du poste de formage, illustrant le mandrin en position rétractée.
  • La figure 7 est une vue similaire à la figure 6 représentant le mandrin en position de formage.
  • La figure 8 est une vue en perspective représentant les deux nacelles du poste de formage.
  • La figure 9 est une vue de côté de l'une des nacelles.
  • Les figures 10 à 14 sont des vues transversales illustrant les différentes étapes de formage du flan sur le mandrin.
The invention will be better understood and its advantages will appear more clearly on reading the following description of embodiments given by way of non-limiting examples. The description refers to the accompanying drawings in which:
  • The figure 1 shows a top view of an embodiment of a blank usable with the method and the gluing device according to the invention.
  • The figure 2 is a perspective view of a machine for forming a box with a polygonal section, from the blank illustrated in figure 1 , including a sizing device according to the invention.
  • The figure 3 is a side view in longitudinal section of the machine shown in figure 2 , more precisely on the right side of the machine in the direction of transport of the blanks.
  • The figures 4 and 5 are top views of the machine shown on figure 2 , the figure 5 differing from figure 4 in that it also represents blanks being processed on the machine.
  • The figure 6 is a cross-sectional view of the forming station, showing the mandrel in the retracted position.
  • The figure 7 is a view similar to figure 6 representing the mandrel in the forming position.
  • The figure 8 is a perspective view showing the two nacelles of the forming station.
  • The figure 9 is a side view of one of the nacelles.
  • The figures 10 to 14 are cross-sectional views illustrating the various stages of forming the blank on the mandrel.

Les éléments communs aux différentes figures seront désignés par les mêmes références.The elements common to the various figures will be designated by the same references.

La figure 1 montre un flan 1 en carton ondulé double face, par exemple à faible grammage (< 250 g/m2) par exemple d'épaisseur 3 mm destiné à former une boîte.The figure 1 shows a blank 1 made of double-sided corrugated cardboard, for example of low weight (<250 g / m2), for example 3 mm thick, intended to form a box.

Il comporte une suite 2 de quatre volets principaux rectangulaires 3, 4, 5, 6 terminés par une languette de collage 7 et reliés entre eux par des premières lignes de pliage, parallèles entre elles, à savoir une première ligne de pliage centrale ou de référence 8, deux premières lignes de pliage latérales 9 et 10, et une première ligne de pliage d'extrémité 11, de jonction avec la languette 7.It comprises a series 2 of four main rectangular shutters 3, 4, 5, 6 terminated by a gluing tab 7 and interconnected by first fold lines, parallel to each other, namely a first central or reference fold line 8, two first lateral fold lines 9 and 10, and a first end fold line 11, junction with the tongue 7.

Les volets 3 et 6 sont dénommés volets extrêmes et les volets 4 et 5, volets intermédiaires.Flaps 3 and 6 are called end flaps and flaps 4 and 5, intermediate flaps.

Le flan comprend de façon connue en elle-même un premier jeu 12 de rabats 13 rectangulaires ou sensiblement rectangulaires reliés aux volets principaux par des deuxièmes lignes de pliage 14 perpendiculaires aux premières et propres à former le dessus de la boîte après remplissage et un deuxième jeu 15 de rabats 16a à 16d rectangulaires ou sensiblement rectangulaires également reliés aux volets principaux par des deuxièmes lignes de pliage 14 et propres à former le fond de la boîte.The blank comprises, in a manner known in itself, a first set 12 of rectangular or substantially rectangular flaps 13 connected to the main flaps by second fold lines 14 perpendicular to the first and suitable for forming the top of the box after filling and a second set 15 of rectangular or substantially rectangular flaps 16a to 16d also connected to the main flaps by second fold lines 14 and suitable for forming the bottom of the box.

Le procédé et le dispositif selon l'invention peuvent également utiliser des variantes du flan illustré à la figure 1 et notamment un flan comportant des volets principaux rectangulaires reliés entre eux par des volets secondaires rectangulaires.The method and the device according to the invention can also use variants of the blank illustrated at figure 1 and in particular a blank comprising rectangular main shutters interconnected by rectangular secondary shutters.

De façon connue, ces volets secondaires forment, sur la boîte finale, les angles biseautés de cette dernière.In known manner, these secondary flaps form, on the final box, the bevelled angles of the latter.

Ils peuvent également utiliser des flans comportant un volet intermédiaire et deux volets extrêmes pour l'obtention d'une partie de boîte.They can also use blanks comprising an intermediate flap and two end flaps to obtain a part of the box.

Il est tout d'abord fait référence aux figures 2 à 5 pour décrire une machine de formation d'une boîte à section polygonale à partir du flan illustré à la figure 1, cette machine comprenant un dispositif d'encollage selon le mode de réalisation de l'invention plus particulièrement décrit ici, notamment en référence aux autres figures.First of all, reference is made to figures 2 to 5 to describe a machine for forming a box with a polygonal section from the blank illustrated in figure 1 , this machine comprising a sizing device according to the embodiment of the invention more particularly described here, in particular with reference to the other figures.

Cette machine 20 comporte un bâti ou structure 21 formant une plateforme porteuse de sous-ensembles ou modules indépendants, assemblés pour assurer la formation d'une boîte à partir du flan illustré à la figure 1.This machine 20 comprises a frame or structure 21 forming a platform supporting independent subassemblies or modules, assembled to form a box from the blank illustrated in figure 1 .

Il s'agit du module 30 de stockage-dépilage des flans, du module 40 d'encollage des flans, du module 50 de formage, et du module 60 d'extraction.These are the blank storage-unstacking module 30, the blank gluing module 40, the forming module 50, and the extraction module 60.

Ces modules peuvent être fabriqués indépendamment et montés ensuite sur le bâti 22.These modules can be manufactured independently and then mounted on the frame 22.

Ainsi, le bâti 21 assure la liaison entre les deux modules d'extrémité, à savoir le module de stockage-dépilage 30 et le module d'extraction 60.Thus, the frame 21 provides the connection between the two end modules, namely the storage-unstacking module 30 and the extraction module 60.

Dans les poteaux 22 du bâti, peut être prévue une armoire électrique qui comprend un automate programmable de pilotage de la machine, connu en lui-même.In the posts 22 of the frame, an electrical cabinet may be provided which comprises a programmable controller for controlling the machine, known in itself.

Le premier module 30 de stockage-dépilage comporte un magasin 31 de stockage en position semi-verticale des flans 1 à former.The first storage-unstacking module 30 comprises a storage magazine 31 in the semi-vertical position of the blanks 1 to be formed.

Celui-ci comprend deux chaines modulaires 32 entrainées par un système 33, comprenant par exemple un moteur asynchrone.This comprises two modular chains 32 driven by a system 33, comprising for example an asynchronous motor.

Les chaines 32 sont par exemple couplées à une roue libre 34 et permettent de maintenir un flan prêt à être alimenté en partie frontale 36.The chains 32 are for example coupled to a freewheel 34 and make it possible to maintain a blank ready to be fed in the front part 36.

Dans le magasin de stockage 31, les flans sont stockés avec la face imprimée tournée vers l'extérieur de la machine et la languette du flan située du côté droit de la machine dans le sens de défilement des flans.In the storage magazine 31, the blanks are stored with the printed side facing the outside of the machine and the tab of the blank located on the right side of the machine in the direction of travel of the blanks.

Ce module 30 comporte également des moyens 35 (cf. figure 3) de dépilage des flans 1 depuis le magasin 31.This module 30 also includes means 35 (cf. figure 3 ) unstacking blanks 1 from the store 31.

Le module d'encollage 40 comporte un dispositif d'encollage avec un support plan 41, tel qu'une table, destiné à recevoir un flan 1. Sur les bords longitudinaux de cette table 41, sont prévus des taquets 410 fixes par rapport à la table, permettant d'assurer le positionnement du flan.The gluing module 40 comprises a gluing device with a flat support 41, such as a table, intended to receive a blank 1. On the longitudinal edges of this table 41, cleats 410 are provided which are fixed relative to the table, ensuring the positioning of the blank.

Le dispositif d'encollage comporte également un système de bras articulés 42 supportant une buse 420 positionnée au-dessus du support.The gluing device also comprises a system of articulated arms 42 supporting a nozzle 420 positioned above the support.

Le module 50 de formage comporte un mandrin 51, c'est-à-dire un outil de forme, autour duquel le flan préalablement encollé par le dispositif d'encollage sera formé.The forming module 50 comprises a mandrel 51, that is to say a forming tool, around which the blank previously glued by the sizing device will be formed.

Pour déplacer le flan 1 depuis le dispositif d'encollage jusque sous le mandrin 51, sont prévus des moyens de transfert 43 comprenant un système de bras articulés, situés sous la table 41 et susceptibles de saisir par en dessous un flan par des moyens d'aspiration.To move the blank 1 from the gluing device to under the mandrel 51, transfer means 43 are provided comprising a system of articulated arms, located under the table 41 and capable of gripping a blank from below by means of aspiration.

Le module de formage 50 (cf. figure 4) comporte quant à lui deux nacelles 52, 53, solidaires du bâti 21 et disposées de part et d'autre du mandrin 51, transversalement et de façon symétrique par rapport à la direction d'amenée du flan depuis le poste d'encollage.The forming module 50 (cf. figure 4 ) for its part comprises two nacelles 52, 53, integral with the frame 21 and arranged on either side of the mandrel 51, transversely and symmetrically with respect to the direction of supply of the blank from the gluing station.

Ces nacelles comportent, dans l'exemple illustré sur les figures 2 à 5, les moyens d'enroulement des volets et les moyens de fixation de la languette.These nacelles comprise, in the example illustrated on the figures 2 to 5 , the means for winding the shutters and the means for fixing the tongue.

Le module d'extraction 60 comprend un poste d'extraction pour extraire une boîte ou partie de boîte à section polygonale depuis le mandrin 51 où elle a été formée, grâce à un dispositif d'extraction 61, un poste d'évacuation comprenant les deux convoyeurs 62, 63 ainsi qu'un poste de transfert des boîtes ou parties de boîte du poste d'extraction vers le poste d'évacuation.The extraction module 60 comprises an extraction station for extracting a box or part of a box with a polygonal section from the mandrel 51 where it has been formed, thanks to an extraction device 61, an evacuation station comprising the two conveyors 62, 63 as well as a station for transferring boxes or parts of boxes from the extraction station to the discharge station.

Le module 50 de formage va maintenant être décrit plus en détail au regard des figures 6 à 14.The forming module 50 will now be described in more detail with regard to figures 6 to 14 .

La figure 6 illustre le mandrin 51 et le flan 1, précédemment encollés au poste d'encollage 40.The figure 6 illustrates the mandrel 51 and the blank 1, previously glued at the gluing station 40.

Le mandrin et le flan sont ici illustrés transversalement à la direction de circulation des flans dans la machine 20 et vus depuis l'arrière de la machine. En d'autres termes, la languette 7 est située à droite selon le sens de déplacement du flan 1 à l'intérieur de la machine 20 et à gauche sur la figure 6.The mandrel and the blank are here illustrated transversely to the direction of circulation of the blanks in the machine 20 and seen from the rear of the machine. In other words, the tongue 7 is located on the right according to the direction of movement of the blank 1 inside the machine 20 and on the left on the figure 6 .

Dans l'exemple de mise en œuvre du procédé qui va être décrit, des lignes d'adhésif ont été déposées à proximité du bord libre du volet 3, ainsi que sur les rabats 16a et 16c. Ces lignes d'adhésif ont été déposées sur la face supérieure du flan qui est illustrée à la figure 1.In the exemplary implementation of the method which will be described, lines of adhesive have been deposited near the free edge of the shutter 3, as well as on the flaps 16a and 16c. These lines of adhesive have been applied to the upper face of the blank which is illustrated on figure 1 .

Cette face supérieure est celle en regard du mandrin 51 sur la figure 6 et elle est opposée à la face inférieure qui est la face imprimée du flan.This upper face is the one facing the mandrel 51 on the figure 6 and it is opposite to the lower face which is the printed face of the blank.

Bien entendu, l'invention n'est pas limitée à ce mode de mise en œuvre. En particulier, le dépôt des lignes d'adhésif pourrait être réalisé sur la face inférieure du flan, c'est-à-dire celle en regard de la table 41, la face imprimée du flan constituant alors sa face supérieure.Of course, the invention is not limited to this mode of implementation. In particular, the lines of adhesive could be deposited on the lower face of the blank, that is to say the one facing the table 41, the printed side of the blank then constituting its upper face.

Dans ce cas, les lignes d'adhésif seront déposées sur les rabats 16b et 16d.In this case, the lines of adhesive will be deposited on the flaps 16b and 16d.

Comme indiqué précédemment, le flan 1 est déplacé depuis le poste d'encollage 40 jusque sous le mandrin 51 par des moyens de transfert 43 comprenant un système de bras articulés.As indicated above, the blank 1 is moved from the gluing station 40 to under the mandrel 51 by transfer means 43 comprising a system of articulated arms.

Ces moyens de transfert présentent l'avantage d'être extrêmement précis. Ils permettent notamment de supprimer l'ensemble des guides latéraux qui doivent être présents lorsque le transfert s'effectue par exemple au moyen de doigts d'entrainement. Ils permettent également de supprimer la butée avant qui est normalement prévue pour bien positionner le flan sous le mandrin. C'est pourquoi cette butée avant n'est pas illustrée sur les figures.These transfer means have the advantage of being extremely precise. They make it possible in particular to eliminate all the lateral guides which must be present when the transfer is performed, for example by means of drive fingers. They also make it possible to eliminate the front stop which is normally provided for properly positioning the blank under the mandrel. This is why this front stop is not illustrated in the figures.

Cependant, l'invention n'est pas limitée à ce mode de mise en œuvre et le flan 1 pourrait être déplacé depuis le poste d'encollage 40 jusqu'au poste de formage 50 par des moyens classiques se déplaçant linéairement.However, the invention is not limited to this mode of implementation and the blank 1 could be moved from the gluing station 40 to the forming station 50 by conventional means moving linearly.

La figure 6 illustre donc le flan 1 après son positionnement sous le mandrin 51 grâce aux moyens de transfert 43 et sa reprise et son maintien par des moyens de support 54 et 55, situés sous le mandrin 51 et sur lesquels le flan 1 vient en appui par sa face inférieure, lorsque les moyens 43 ont quitté le poste de formage pour retourner au poste d'encollage.The figure 6 therefore illustrates the blank 1 after its positioning under the mandrel 51 thanks to the transfer means 43 and its recovery and its maintenance by support means 54 and 55, located under the mandrel 51 and on which the blank 1 bears by its face lower, when the means 43 have left the forming station to return to the gluing station.

Dans l'exemple illustré à la figure 6, ces moyens de support sont en contact d'au moins une partie de la surface du volet intermédiaire 5 et du volet extrême 3. D'autres solutions de support et/ou de maintien du flan 1 peuvent être envisagées sans sortir du cadre de la présente invention.In the example shown in figure 6 , these support means are in contact with at least part of the surface of the intermediate flap 5 and of the end flap 3. Other solutions for supporting and / or maintaining the blank 1 can be envisaged without going beyond the scope of the present invention.

La figure 6 montre que les moyens de support 54 situés sous le mandrin comportent deux pavés latéraux 540 et 541 et un support intermédiaire 542.The figure 6 shows that the support means 54 located under the mandrel comprise two side blocks 540 and 541 and an intermediate support 542.

Le mandrin 51 comprend une face d'application 510, destinée à être en regard du flan 1, une face supérieure 511, opposée à la face d'application 510 sur laquelle sera plaqué le volet principal 3, ainsi que des faces latérales 512 et 513, sur lesquelles seront enroulés les volets principaux 4 et 6, et une face d'extrémité 514 sur laquelle seront rabattus les rabats latéraux 16a à 16d.The mandrel 51 comprises an application face 510, intended to be facing the blank 1, an upper face 511, opposite the application face 510 on which the main flap 3 will be pressed, thus as side faces 512 and 513, on which the main flaps 4 and 6 will be wound, and an end face 514 on which the side flaps 16a to 16d will be folded.

Les faces du mandrin peuvent être formées par des plaques ou encore par des cornières d'angles, de façon connue en elle-même.The faces of the mandrel can be formed by plates or even by angle brackets, in a manner known per se.

Dans les exemples illustrés sur les figures, les arêtes sont des lignes droites.In the examples illustrated in the figures, the edges are straight lines.

Lorsque le flan 1 comporte des volets secondaires rectangulaires entre les volets principaux, le mandrin 51 présente des arêtes à coins coupés pour que les volets secondaires forment les angles biseautés de la boîte obtenue après formage.When the blank 1 comprises rectangular secondary flaps between the main flaps, the mandrel 51 has edges with cut corners so that the secondary flaps form the bevelled angles of the box obtained after forming.

En comparant les figures 6 et 7, on comprend que le mandrin 51 est mobile entre une position rétractée illustrée à la figure 6 et une position de formage, illustrée à la figure 7.By comparing the figures 6 and 7 , it is understood that the mandrel 51 is movable between a retracted position illustrated on figure 6 and a forming position, shown in figure 7 .

Dans la position rétractée illustrée à la figure 6, la distance entre la face d'application 510 du mandrin et sa face opposée 511 est inférieure à la largeur de la boîte qui sera obtenue à partir du flan 1.In the retracted position shown in figure 6 , the distance between the application face 510 of the mandrel and its opposite face 511 is less than the width of the box which will be obtained from the blank 1.

Cette position rétractée permet aux moyens de transfert 43 de faire passer le flan 1 entre la face d'application 510 du mandrin et les moyens de support 54 et 55.This retracted position allows the transfer means 43 to pass the blank 1 between the application face 510 of the mandrel and the support means 54 and 55.

Dans la position de formage illustrée à la figure 7, la section transversale extérieure du mandrin correspond à la section transversale intérieure de la boîte qui sera obtenue à partir du flan 1 et la face d'application 510 est en contact avec la face supérieure du flan 1.In the forming position shown in figure 7 , the outer cross section of the mandrel corresponds to the inner cross section of the box which will be obtained from the blank 1 and the face application 510 is in contact with the upper face of the blank 1.

Dans l'exemple de réalisation illustré sur les figures 6 et 7, la distance entre la face d'application 510 et la face opposée 511 du mandrin est réglable, grâce à des moyens appropriés tels que des vérins 515. L'invention n'est cependant pas limitée à ce mode de réalisation et des variantes pourraient être envisagées sans sortir de son cadre.In the exemplary embodiment illustrated on figures 6 and 7 , the distance between the application face 510 and the opposite face 511 of the mandrel is adjustable, by means of suitable means such as jacks 515. The invention is however not limited to this embodiment and variants could be considered without departing from its framework.

On comprend que les pavés latéraux 540, 541 sont positionnés en regard du mandrin de façon à ce que leur face extérieure 5400, 5410 soit sensiblement à l'aplomb d'une face latérale 512, 513 du mandrin 51.It will be understood that the side blocks 540, 541 are positioned facing the mandrel so that their outer face 5400, 5410 is substantially in line with a lateral face 512, 513 of the mandrel 51.

Ceci permet d'assurer un plaquage efficace du volet intermédiaire 5 contre la face d'application 510 du mandrin.This ensures effective plating of the intermediate flap 5 against the application face 510 of the mandrel.

Le formage de la boîte autour du mandrin est effectué par les nacelles 52 et 53 qui vont être décrites plus en détail en référence aux figures 8 et 9.The forming of the box around the mandrel is performed by the boats 52 and 53 which will be described in more detail with reference to figures 8 and 9 .

Comme indiqué précédemment, ces deux nacelles sont solidaires du bâti 21 de la machine et sont disposées de part et d'autre du mandrin (non illustré sur la figure 8), transversalement et de façon symétrique par rapport à la direction d'amenée du flan depuis le poste d'encollage.As indicated above, these two nacelles are integral with the frame 21 of the machine and are arranged on either side of the mandrel (not shown in FIG. figure 8 ), transversely and symmetrically with respect to the direction of supply of the blank from the gluing station.

Le sens dans lequel les flans sont acheminés à l'intérieur de la machine 20 est illustré par la flèche F sur la figure 8.The direction in which the blanks are fed inside the machine 20 is illustrated by the arrow F on the figure 8 .

Ainsi, la nacelle 52 est située du côté de la languette 7 d'un flan positionné sous le mandrin, tandis que la nacelle 53 sera positionnée sous les volets 3 et 4.Thus, the nacelle 52 is located on the side of the tongue 7 of a blank positioned under the mandrel, while the nacelle 53 will be positioned under shutters 3 and 4.

Chaque nacelle 52, 53 comporte un système de bras articulés 56, 57 réalisé de façon identique.Each nacelle 52, 53 comprises a system of articulated arms 56, 57 produced identically.

Ainsi, ce système de bras articulés 56, 57 comprend une paire de bras principaux 560, 570 reliés entre eux par deux axes 561, 571 et 562, 572.Thus, this system of articulated arms 56, 57 comprises a pair of main arms 560, 570 interconnected by two axes 561, 571 and 562, 572.

Ces deux axes 561, 562 et 571, 572 sont espacés l'un de l'autre et s'étendent sensiblement longitudinalement, c'est-à-dire selon la direction de déplacement des flans dans la machine 20.These two axes 561, 562 and 571, 572 are spaced from one another and extend substantially longitudinally, that is to say in the direction of movement of the blanks in the machine 20.

Chaque bras principal 560, 570 supporte un bras intermédiaire 563, 573.Each main arm 560, 570 supports an intermediate arm 563, 573.

Les deux bras intermédiaires 563, 573 sont, à l'une de leur extrémité, montés mobiles en rotation autour de l'axe 562, 572 commun aux deux bras principaux 560, 570.The two intermediate arms 563, 573 are, at one of their ends, mounted movable in rotation about the axis 562, 572 common to the two main arms 560, 570.

A leur extrémité opposée à celle montée en rotation sur l'axe 562, 572, les bras intermédiaires 563, 573 sont montés mobiles en rotation sur un axe 564, 574 commun à deux bras secondaires 565, 575.At their end opposite to that mounted in rotation on the axis 562, 572, the intermediate arms 563, 573 are mounted to be able to rotate on an axis 564, 574 common to two secondary arms 565, 575.

De plus, les biellettes 566, 576, respectivement 567, 577 doublent chacun des bras principaux 560, 570, respectivement chacun des bras secondaires 565, 575.In addition, the links 566, 576, respectively 567, 577 each double the main arms 560, 570, respectively each of the secondary arms 565, 575.

L'extrémité des bras secondaires 565, 575 et des biellettes 567, 577, opposée aux bras intermédiaires 563, 573, est munie de moyens de support 568, 578 pour un plaqueur latéral 521, 531 qui comporte une surface de glissement 522, 532. Ces deux surfaces de glissement s'étendent dans un plan longitudinal, sensiblement parallèlement aux faces latérales 512 et 513 du mandrin et perpendiculairement au flan 1, lorsqu'il est positionné sous le mandrin 51. Elles sont conçues pour assurer l'enroulement du volet 6, 4 et son plaquage contre le mandrin 51.The end of the secondary arms 565, 575 and of the links 567, 577, opposite the intermediate arms 563, 573, is provided with support means 568, 578 for a side plate 521, 531 which has a sliding surface 522, 532. These two sliding surfaces extend in a longitudinal plane, substantially parallel to the side faces 512 and 513 of the mandrel and perpendicular to the blank 1, when it is positioned under the mandrel 51. They are designed to ensure the winding of the shutter 6, 4 and its plating against the mandrel 51.

Ces nacelles sont conçues pour supporter tous les moyens permettant la formation de la boîte.These nacelles are designed to support all means allowing the formation of the box.

Ainsi, la nacelle 52 supporte des moyens 523 pour casser et replier la languette 7 autour de la ligne de pliage 11 et des moyens 524 pour assurer la fixation du volet 3 sur la languette 7, une fois repliée.Thus, the nacelle 52 supports means 523 for breaking and folding the tab 7 around the fold line 11 and means 524 for securing the shutter 3 on the tab 7, once folded.

Les moyens 523 sont prévus à proximité de la partie supérieure 5220 de la surface de glissement. Ils peuvent être formés d'un actionneur présentant la forme d'un peigne à trois dents, chacune d'elles étant susceptible de passer par un orifice 5230.The means 523 are provided near the upper part 5220 of the sliding surface. They can be formed of an actuator having the shape of a comb with three teeth, each of them being able to pass through an orifice 5230.

Les moyens 524 comportent deux bras 5240 (deuxième bras articulé) sensiblement parallèles et présentant une forme générale en L.The means 524 comprise two arms 5240 (second articulated arm) substantially parallel and having a general L shape.

Ces deux bras 5240 sont montés en rotation sur le plaqueur latéral 521, autour d'un axe commun 5241 qui s'étend sensiblement longitudinalement, par l'extrémité libre de la première branche du L.These two arms 5240 are mounted in rotation on the side plate 521, around a common axis 5241 which extends substantially longitudinally, by the free end of the first branch of the L.

Comme l'illustrent les figures, cet axe 5241 est situé à l'arrière du plaqueur latéral, par rapport à la surface de glissement 522.As illustrated in the figures, this axis 5241 is located at the rear of the side plate, relative to the sliding surface 522.

A l'extrémité libre de la deuxième branche du L, opposée à l'axe 5241, les bras 5240 supportent une plaque 5242 qui s'étend sensiblement perpendiculairement à la deuxième branche du L formé par les bras 5240.At the free end of the second branch of the L, opposite to the axis 5241, the arms 5240 support a plate 5242 which extends substantially perpendicular to the second branch of the L formed by the arms 5240.

La nacelle 52 supporte également un bras articulé 525, situé en aval des moyens de repliage 523, dans le sens de circulation des flans illustré par la flèche F.The nacelle 52 also supports an articulated arm 525, located downstream of the folding means 523, in the direction of circulation of the blanks illustrated by the arrow F.

Ce bras articulé 525 est destiné à rabattre le rabat latéral 16a (en position supérieure) contre la face d'extrémité 514 du mandrin 51, en coopération avec le bras 534 de la nacelle 53 qui sera décrit ultérieurement.This articulated arm 525 is intended to fold the side flap 16a (in the upper position) against the end face 514 of the mandrel 51, in cooperation with the arm 534 of the nacelle 53 which will be described later.

La nacelle 53 supporte quant à elle un ensemble 533 pour enrouler le volet principal 4 autour du mandrin.The nacelle 53 for its part supports an assembly 533 for winding the main flap 4 around the mandrel.

Cet ensemble comprend deux bras 5330 sensiblement parallèles et montés en rotation autour d'un axe commun 5331 qui est sensiblement longitudinal. Cet axe 5331 est situé sensiblement à l'extrémité supérieure 5320 de la surface de glissement 532 du plaqueur latéral 531, à l'opposé des moyens de support 578.This assembly comprises two arms 5330 which are substantially parallel and mounted in rotation about a common axis 5331 which is substantially longitudinal. This axis 5331 is located substantially at the upper end 5320 of the sliding surface 532 of the side plate 531, opposite the support means 578.

A leur extrémité opposée à l'axe 5331, les bras 5330 (premier bras articulé) supportent une plaque 5332.At their end opposite to the axis 5331, the arms 5330 (first articulated arm) support a plate 5332.

Par ailleurs, la nacelle 53 supporte également un bras articulé 534 qui est destiné à rabattre le rabat latéral 16a (en position supérieure et en vis-à-vis du rabat 16c) sur la face d'extrémité 514 du mandrin 51, en coopération avec le bras 525 de la nacelle 52.Furthermore, the nacelle 53 also supports an articulated arm 534 which is intended to fold down the side flap 16a (in the upper position and opposite the flap 16c) on the end face 514 of the mandrel 51, in cooperation with the arm 525 of the nacelle 52.

Ce bras articulé est situé en aval des moyens d'enroulement 533 par rapport au sens de déplacement des flans, matérialisé par la flèche F. Il est situé sensiblement en vis-à-vis du bras 525 de la nacelle 52.This articulated arm is located downstream of the winding means 533 with respect to the direction of movement. blanks, represented by the arrow F. It is located substantially opposite the arm 525 of the nacelle 52.

Enfin, chaque nacelle 52, 53 comporte des moyens 526, 536 en vis-à-vis pour replier les rabats latéraux 16d et 16c, sur la face d'extrémité 514 du mandrin.Finally, each nacelle 52, 53 comprises means 526, 536 facing each other for folding the side flaps 16d and 16c, on the end face 514 of the mandrel.

Ces moyens 526, 536 peuvent consister en un doigt susceptible de passer à travers une lumière, 5260, 5360 et actionné par un ensemble de trois actionneurs pilotés en fonction de la dimension des rabats 16d et 16c.These means 526, 536 can consist of a finger capable of passing through a lumen, 5260, 5360 and actuated by a set of three actuators controlled according to the size of the flaps 16d and 16c.

Il est maintenant fait référence à la figure 9 qui représente la nacelle 53, vue de côté.Reference is now made to the figure 9 which represents the nacelle 53, side view.

Cette figure 9 illustre le plaqueur latéral 531 qui supporte la plaque 5332 et le bras 534.This figure 9 illustrates the side plate 531 which supports the plate 5332 and the arm 534.

Elle illustre également les moyens d'actionnement du bras 534, comprenant un système de vérins 5340.It also illustrates the means for actuating the arm 534, comprising a system of jacks 5340.

La figure 9 montre les moyens de repliage 536 et leurs moyens d'actionnement.The figure 9 shows the folding means 536 and their actuating means.

Elle montre également les courroies 575 qui génèrent le mouvement du système de bras articulés 57, grâce au moteur 578.It also shows the 575 belts which generate the movement of the articulated arm system 57, thanks to the motor 578.

La nacelle 52 comporte des moyens d'entrainement du système de bras articulés 56 qui est similaire.The nacelle 52 comprises means for driving the articulated arm system 56 which is similar.

En pratique, les moteurs associés à chacun de ces systèmes de bras articulés sont pilotés pour que les deux systèmes de bras articulés 56, 57 soient animés du même mouvement, lors de l'enroulement des volets sur le mandrin.In practice, the motors associated with each of these articulated arm systems are controlled so that the two articulated arm systems 56, 57 are driven by the same movement, when the shutters are wound on the mandrel.

Il est maintenant fait référence aux figures 10 à 14 pour expliquer les différentes étapes de formage d'un flan autour du mandrin 51, à l'aide des deux nacelles 52 et 53.Reference is now made to figures 10 to 14 to explain the different stages of forming a blank around the mandrel 51, using the two boats 52 and 53.

La figure 10 illustre la position relative du mandrin 51 et du flan 1 avant que le formage ne commence.The figure 10 illustrates the relative position of mandrel 51 and blank 1 before forming begins.

Cette position est celle illustrée à la figure 7. On comprend que le flan 1 doit être positionné de façon précise par rapport au mandrin 51. En effet, l'enroulement des volets est réalisé après plaquage du flan contre la face d'application 510.This position is the one illustrated in figure 7 . It will be understood that the blank 1 must be positioned precisely relative to the mandrel 51. In fact, the winding of the flaps is carried out after the blank is pressed against the application face 510.

Ce contexte est donc différent de celui du brevet EP 0 334 707 qui décrit un procédé dans lequel l'enroulement du flan commence alors que son plaquage contre le mandrin n'a pas été réalisé.This context is therefore different from that of the patent. EP 0 334 707 which describes a method in which the winding of the blank begins while its plating against the mandrel has not been carried out.

En pratique, le volet 5 est donc en contact avec la face d'application 510, tandis que le volet 6 s'étend du côté de la nacelle 52 et les volets 3 et 4 du côté de la nacelle 53.In practice, the flap 5 is therefore in contact with the application face 510, while the flap 6 extends on the side of the nacelle 52 and the flaps 3 and 4 on the side of the nacelle 53.

Dans cette position, les systèmes de bras articulés 56, 57 sont en position repliée, comme illustré sur la figure 8.In this position, the articulated arm systems 56, 57 are in the folded position, as illustrated in figure 8 .

Ces deux systèmes sont ensuite commandés pour passer dans la position déployée illustrée à la figure 12.These two systems are then commanded to move to the deployed position shown in figure 12 .

Lors du passage de la position repliée à la position déployée, les mouvements de rotation des bras principaux et secondaires ainsi que des bras intermédiaires impriment à chaque plaqueur latéral 521, 531 un mouvement combiné vers le haut et vers l'intérieur de la machine.When changing from the stowed position to the deployed position, the rotational movements of the main and secondary arms as well as the intermediate arms impress on each side tackle 521, 531 a combined upward and inward movement of the machine.

La figure 11 illustre une position intermédiaire entre la position repliée de la figure 10 et la position déployée de la figure 12.The figure 11 illustrates an intermediate position between the folded position of the figure 10 and the deployed position of the figure 12 .

Dans cette position intermédiaire, la partie supérieure 5220 de la surface de glissement 522 est en contact avec la face inférieure (imprimée) du volet 6. Le mouvement de la surface de glissement 522 provoque l'enroulement du volet 6 autour du mandrin et son pliage autour de la ligne de pliage 10.In this intermediate position, the upper part 5220 of the sliding surface 522 is in contact with the lower (printed) face of the shutter 6. The movement of the sliding surface 522 causes the shutter 6 to be wound around the mandrel and its folding. around the fold line 10.

De même, la partie supérieure 5320 de la surface de glissement 532 est en contact avec le volet 4, tandis que la plaque 5332 de l'ensemble 533 est en contact avec la face inférieure du volet 3.Likewise, the upper part 5320 of the sliding surface 532 is in contact with the shutter 4, while the plate 5332 of the assembly 533 is in contact with the lower face of the shutter 3.

Le mouvement de la surface de glissement 532 permet d'enrouler le volet 4 autour du mandrin et de le plier autour de la ligne de pliage 8, la plaque 5332 permettant de maintenir le volet 3 dans le prolongement du volet 4.The movement of the sliding surface 532 makes it possible to wind the shutter 4 around the mandrel and to fold it around the fold line 8, the plate 5332 making it possible to keep the shutter 3 in the extension of the shutter 4.

Dans la position déployée des nacelles illustrée à la figure 12, le volet 6 est plaqué contre la surface latérale 512 du mandrin, grâce à la surface de glissement 522.In the deployed position of the pods shown on figure 12 , the shutter 6 is pressed against the lateral surface 512 of the mandrel, thanks to the sliding surface 522.

Par ailleurs, les moyens de repliage 523 sont actionnés pour plier la languette 7, autour de la ligne de pliage 11. Elle est alors en contact avec la face supérieure 511 du mandrin.Furthermore, the folding means 523 are actuated to fold the tongue 7, around the fold line 11. It is then in contact with the upper face 511 of the mandrel.

En parallèle, la surface de glissement 532 de la nacelle 53 plaque le volet 4 contre la face latérale 513 du mandrin. De plus, les bras 5330 tournent dans le sens anti-horaire autour de l'axe 5331 pour plier le volet 3 autour de la ligne de pliage 9.In parallel, the sliding surface 532 of the nacelle 53 presses the shutter 4 against the lateral face 513 of the mandrel. In addition, the 5330 arms rotate in counterclockwise around axis 5331 to fold flap 3 around fold line 9.

Dans l'étape suivante illustrée à la figure 13, les deux nacelles 52, 53 restent dans la position déployée illustrée à la figure 12.In the next step shown in figure 13 , the two nacelles 52, 53 remain in the deployed position illustrated on figure 12 .

Dans cette position, les bras d'enroulement 5330 poursuivent leur rotation autour de l'axe 5331 dans le sens anti-horaire, ce qui assure le plaquage du volet 3 contre la face supérieure 511 du mandrin grâce à la plaque 5332.In this position, the winding arms 5330 continue their rotation around the axis 5331 in the anti-clockwise direction, which ensures the flap 3 is pressed against the upper face 511 of the mandrel thanks to the plate 5332.

Parallèlement, s'amorce le mouvement des bras 5240 autour de l'arbre 5241, dans le sens horaire.At the same time, the movement of the arms 5240 begins around the shaft 5241, in a clockwise direction.

Dans cette position, les moyens de repliage 526, 536 sont actionnés, de façon à plier les rabats latéraux 16d et 16b autour des lignes de pliage 14 pour les plaquer contre la face d'extrémité 514 du mandrin.In this position, the folding means 526, 536 are actuated, so as to fold the side flaps 16d and 16b around the fold lines 14 to press them against the end face 514 of the mandrel.

Les bras 525 et 534 sont ensuite actionnés pour replier le rabat supérieur 16a contre les rabats latéraux 16b et 16d déjà repliés, par pliage autour de la ligne de pliage 14.The arms 525 and 534 are then actuated to fold the top flap 16a against the side flaps 16b and 16d already folded, by folding around the fold line 14.

La figure 14 illustre l'étape suivante pendant laquelle se poursuit le mouvement de rotation des bras 5240 autour de l'axe 5241, de telle sorte que la plaque 5242 vient en appui sur le volet 3 et assure sa fixation sur la languette 7, par pressage, grâce à l'adhésif présent à proximité du bord libre du volet 3.The figure 14 illustrates the next step during which the movement of rotation of the arms 5240 continues around the axis 5241, so that the plate 5242 bears on the shutter 3 and secures it on the tongue 7, by pressing, thanks to to the adhesive present near the free edge of the shutter 3.

Si la ligne d'adhésif n'était pas présente à proximité du bord libre du volet 3 mais sur la face supérieure de la languette, les moyens de repliage 523 ne seraient alors actionnés qu'après l'ensemble 533. Ainsi, on procèderait tout d'abord au plaquage du volet 3 contre la face supérieure 511 du mandrin puis au pliage de la languette 7 autour de la ligne de pliage 11, grâce aux moyens 523. Enfin, les bras 5240 seraient actionnés de façon à presser la languette 7 contre le volet 3 pour assurer leur fixation grâce à l'adhésif présent sur la languette.If the line of adhesive was not present near the free edge of the shutter 3 but on the upper face of the tab, the folding means 523 would then not be actuated until after the assembly 533. Thus, the flap 3 would be pressed first against the upper face 511 of the mandrel and then the tongue 7 would be folded around the fold line 11, thanks to the means 523. Finally, the arms 5240 would be actuated so as to press the tongue 7 against the flap 3 to ensure their fixing by virtue of the adhesive present on the tongue.

Comme l'illustre la figure 14, lorsque la plaque 5242 assure la fixation entre la languette 7 et le volet 3, la nacelle 53 peut amorcer son mouvement vers la position repliée.As illustrated by figure 14 , when the plate 5242 ensures the attachment between the tongue 7 and the flap 3, the nacelle 53 can begin its movement towards the folded position.

Une fois réalisée la fixation de la languette 7 sur le volet 3, la nacelle 52 amorcera également son mouvement vers la position repliée et les deux nacelles 52 et 53 seront alors dans la position repliée illustrée à la figure 10, les bras 5240 ayant basculé vers l'arrière, grâce à un mouvement de rotation dans le sens anti-horaire autour de l'axe 5241. Le formage d'un nouveau flan autour du mandrin 51 pourra alors intervenir.Once the tab 7 has been fixed to the shutter 3, the nacelle 52 will also begin its movement towards the folded position and the two nacelles 52 and 53 will then be in the folded position illustrated in figure 10 , the arms 5240 having tilted backwards, thanks to a movement of rotation in the anti-clockwise direction around the axis 5241. The forming of a new blank around the mandrel 51 can then take place.

Des moyens sont également prévus pour replier le rabat 16c autour de la ligne de pliage 14 et pour le fixer contre les rabats 16b et 16d déjà repliés contre la face d'extrémité 514 du mandrin.Means are also provided for folding the flap 16c around the fold line 14 and for fixing it against the flaps 16b and 16d already folded against the end face 514 of the mandrel.

Ces moyens ne sont pas illustrés en détail sur les figures car ils sont classiques. Ils peuvent être portés par des plaqueurs latéraux 521, 531 ou être prévus par exemple sur les moyens extracteurs 61 du module d'extraction 60.These means are not illustrated in detail in the figures because they are conventional. They can be carried by side plates 521, 531 or be provided for example on the extractor means 61 of the extraction module 60.

Ainsi, tous les moyens assurant la mise en forme du flan autour du mandrin, la fixation de languette contre le bord libre du volet extrême opposé à la languette et le repliement d'au moins deux rabats se trouvant du même côté des volets contre une face d'extrémité du mandrin sont portés par les nacelles 52, 53 et en particulier par les plaqueurs latéraux 521, 531.Thus, all the means ensuring the shaping of the blank around the mandrel, the fixing of the tongue against the free edge of the end flap opposite the tongue and the folding of at least two flaps located on the same side of the flaps against one face end of the mandrel are carried by the nacelles 52, 53 and in particular by the side plates 521, 531.

Le positionnement de ces différents moyens les uns par rapport aux autres est fixé par avance, lors de la conception de la nacelle.The positioning of these different means relative to each other is fixed in advance, during the design of the nacelle.

Le dispositif selon l'invention ne nécessite donc aucun réglage pour assurer son bon fonctionnement.The device according to the invention therefore does not require any adjustment to ensure its correct operation.

Par ailleurs, le fait que tous ces moyens soient regroupés sur les nacelles permet de limiter l'encombrement et d'éviter notamment la présence de bras fixés à la partie supérieure du bâti, l'espace entre le mandrin et le bâti étant globalement libéré.Furthermore, the fact that all these means are grouped together on the nacelles makes it possible to limit the bulk and in particular to avoid the presence of arms fixed to the upper part of the frame, the space between the mandrel and the frame being generally freed.

On note également que tous les mouvements sont des mouvements de rotation, qu'il s'agisse des mouvements permettant d'entrainer les plaqueurs latéraux ou des mouvements des différents moyens portés par les nacelles.It should also be noted that all the movements are rotational movements, whether these are movements making it possible to train the lateral tackles or movements of the various means carried by the nacelles.

La fixation des rabats 16a et 16c, munis d'adhésif sur leur face supérieure, sur les rabats 16b et 16d précédemment repliés sur la face d'extrémité 514 du mandrin assure une fixation de l'ensemble des quatre rabats latéraux qui est plus solide que lorsque l'adhésif est présent sur la face inférieure des rabats latéraux 16b et 16d et que les rabats 16a et 16c sont repliés sur eux.The fixing of the flaps 16a and 16c, provided with adhesive on their upper face, on the flaps 16b and 16d previously folded on the end face 514 of the mandrel ensures a fixing of the set of the four side flaps which is more solid than when the adhesive is present on the underside of the side flaps 16b and 16d and the flaps 16a and 16c are folded over them.

Enfin, dans la mesure ou l'adhésif est présent sur la face supérieure du flan et que les différents moyens portés par les nacelles sont en contact avec la face inférieure (imprimée) du flan, il n'existe aucun risque que ces moyens viennent en contact avec les lignes d'adhésif précédemment déposées. Ceci diminue les exigences de précision au niveau des réglages des différents moyens et notamment de l'ensemble 533 et des moyens de fixation 524.Finally, insofar as the adhesive is present on the upper face of the blank and the various means carried by the pods are in contact with the lower (printed) face of the blank, there is no risk that these means will come into play. contact with the lines of adhesive previously deposited. This reduces the precision requirements at the level of the settings of the various means and in particular of the assembly 533 and the fixing means 524.

On va maintenant décrire le fonctionnement de la machine permettant la formation d'une boîte en référence aux figures.We will now describe the operation of the machine allowing the formation of a box with reference to the figures.

A partir du magasin 31 de stockage de flans, on extrait un premier flan 1 et on le fait basculer à l'horizontale.From the store 31 for storing blanks, a first blank 1 is extracted and it is tilted horizontally.

On le lâche alors sur la table 41 et on le positionne précisément sur la table 41.It is then released on the table 41 and it is positioned precisely on the table 41.

Le flan étant immobile, on dépose des lignes d'adhésif sur au moins deux rabats latéraux 16c et 16a, sur la face supérieure du flan, la face inférieure constituant la face imprimée du flan.The blank being stationary, lines of adhesive are deposited on at least two side flaps 16c and 16a, on the upper face of the blank, the lower face constituting the printed face of the blank.

Le flan est ensuite transféré du poste d'encollage vers le poste de formage et l'on procède, lors de ce transfert, au dépôt d'une ligne d'adhésif à proximité du bord libre du volet 3 ou sur la languette 7.The blank is then transferred from the gluing station to the forming station and, during this transfer, a line of adhesive is deposited near the free edge of the shutter 3 or on the tongue 7.

Le flan 1 étant positionné sous le mandrin, on procède à son enroulement autour du mandrin, ici au moyen des deux nacelles 52 et 53 précédemment décrites.The blank 1 being positioned under the mandrel, it is wound around the mandrel, here by means of the two pods 52 and 53 described above.

A l'issue de l'étape de formage, le volet 3 est collé sur la languette 7 et les rabats latéraux 16a et 16c sont collés sur les rabats 16b et 16d pour former le fond de la boîte sur la face d'extrémité 510 du mandrin. Cette dernière est tournée du côté du module d'extraction 60.At the end of the forming step, the flap 3 is glued to the tongue 7 and the side flaps 16a and 16c are glued to the flaps 16b and 16d to form the bottom of the box on the end face 510 of the mandrel. The latter is turned towards the extraction module 60.

Celui-ci extrait, par tout moyen approprié, la boîte ainsi formée du mandrin 51, de façon à la déposer sur l'un ou l'autre des convoyeurs 62 ou 63.The latter extracts, by any suitable means, the box thus formed from the mandrel 51, so as to deposit it on one or other of the conveyors 62 or 63.

La description qui précède s'applique également à la formation d'une partie de boîte, notamment un couvercle ou un fond.The foregoing description also applies to the formation of a box part, in particular a cover or a bottom.

Bien entendu, ce procédé est mis en œuvre dans le cadre d'un formage successif et automatique de boîtes ou de parties de boîte, de telle sorte que le flan n est encollé pendant le formage du flan n - 1.Of course, this method is implemented within the framework of a successive and automatic forming of boxes or parts of boxes, such that the blank n is glued during the forming of the blank n - 1.

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 les moyens de déplacement du flan sous le mandrin sont formés par un tapis solidaire des moyens de positionnement du flan de façon précise pour l'encollage.As goes without saying and as it also follows from the foregoing, the present invention is not limited to the embodiments more particularly described. On the contrary, it encompasses all the variants thereof and in particular those where the means for moving the blank under the mandrel are formed by a belt integral with the means for positioning the blank precisely for gluing.

Claims (17)

  1. Device for shaping a blank (1) made of material in sheet form around a mandrel (51), to obtain a box or a part of box of polygonal cross section, said blank comprising a continuation of at least three panels (3 to 6), namely two extreme panels (3, 6) on either side of at least one intermediate panel (4, 5), said panels being connected to one another by parallel folding lines (8 to 10) and provided with side flaps (13, 16a to 16d), connected respectively to said panels by folding lines (14) perpendicular to the folding lines (8 to 10) connecting said panels, the free edge of one (6) of the extreme panels being provided with a tab (7) connected to said extreme panel by a folding line (11) parallel to the folding lines connecting said panels, said blank (1) being glued beforehand in a glue-application workstation (40), on the one hand on two flaps (16a, 16d) and on the other hand, on the tab (7) of the extreme panel or in the proximity of the free edge of the extreme panel (3) opposite said tab, the device comprising:
    - a frame (21),
    - a mandrel (51) of polygonal cross section of which the outer cross section corresponds to the inner cross section of the box or part of box to be obtained,
    - means for wrapping panels and the tab around the mandrel,
    - means for securing the tab against the free edge of the extreme panel opposite the tab,
    - means for folding flaps being located on the same side of said panels against a corresponding end face of the mandrel, and
    - means for securing to one another, the flaps thus folded,
    characterised in that the means for wrapping the panels (522; 532; 533) and the means for securing (524) the tab are supported by two cradles (52, 53) secured to the frame (21) of the device and arranged on either side of the mandrel (51), transversally and symmetrically with respect to the direction in which the blank is brought in from the blank from the glue-application workstation.
  2. Device according to claim 1, characterised in that the means for wrapping each cradle comprise means (521, 531) equipped with a sliding surface (522, 532) to lower a panel (3, 5) of the blank on one of two side faces opposite (512, 513) the mandrel and respectively, for one of the cradles (53), means (533) to lower a panel (6) and for the other cradle (52), means (523) to fold the tab (7) around the edge of the upper face of the mandrel, the cradles (52, 53) each comprising a hinged system (56, 57) to vertically and transversally move the wrapping means.
  3. Device according to claim 2, characterised in that the means (533) for lowering a panel (3) comprise a first hinged arm (5330) mounted mobile in rotation on the means (531) equipped with a sliding surface (532).
  4. Device according to one of claims 2 or 3, characterised in that the other cradle (52) also supports the means for securing (524) the tab (7), these means comprising a second hinged arm (5240) mounted in rotation on the means (521) equipped with a sliding surface (522) of said cradle and equipped with means for compressing (5242) the tab against the free edge of the extreme panel opposite.
  5. Device according to one of claims 1 to 4, characterised in that at least some of the means for folding (525, 526; 534, 536) the flaps is also supported by the two cradles (52, 53).
  6. Device according to one of claims 2 to 5, characterised in that it comprises means for supporting or maintaining (54, 55) at least some of the surface of an intermediate panel (4) of the blank (1) and in that the mandrel (51) comprises an application face (510) of said intermediate panel on the support or maintenance means, side faces (512, 513) and an upper face (511) opposite the application face (510).
  7. Device according to claim 6, characterised in that the mandrel (51) is mobile characterised in that the mandrel (51) is mobile between a first position for forming the box or part of box, wherein the outer cross section thereof corresponds to the inner cross section of the box or part of box to be obtained and a second retracted position, wherein the distance between the application face (510) of the mandrel and the opposite face (511) thereof is less than the width of the box or part of box to be obtained.
  8. Device according to claim 6 or 7, characterised in that the distance between the application face (510) and the face opposite (511) the mandrel is adjustable.
  9. Device according to one of claims 6 to 8, characterised in that the edges of the mandrel have cut corners.
  10. Method for shaping a blank (1) made of material in sheet form around a mandrel to obtain a box or a part of box of polygonal cross section, said blank comprising a continuation of at least three panels (3 to 6), namely two extreme panels (3, 6) on either side of at least one intermediate panel (4, 5), said panels being connected to one another by parallel folding lines (8 to 10) and provided with side flaps (13, 16a to 16d), connected respectively to said panels by folding lines (14) perpendicular to the folding lines (8 to 10) connecting said panels, the free edge (6) of one of the extreme panels being provided with a tab (7) connected to said extreme panel by a folding line (11) parallel to the folding lines connecting said panels, method implementing a device equipped with a frame (21) and wherein the blank (1) being glued beforehand at a glue-application workstation (40) of the device, the panels (3 to 6) are wrapped around a mandrel (51) of polygonal cross section of which the outer cross section corresponds to the inner cross section of the box or part of box to be obtained, the tab (7) is secured against the free edge of the other extreme panel bearing against the upper face (511) of the mandrel, the flaps being located on the same side of said panels are folded against a corresponding end face of the mandrel then secured to one another, characterised in that the wrapping of the panels and of the tab, as well as the securing of said tab result from translation and rotation movements made by means (522, 523, 524; 532, 533) supported by two cradles (52, 53) secured to the frame (21) of the forming device, arranged on either side of the mandrel, transversally and symmetrically with respect to the direction in which the blank is brought in from the glue-application workstation (40).
  11. Method according to claim 10, characterised in that the folding of at least some of the flaps is also done from means (525, 526; 534, 536) supported by the cradles.
  12. Method according to claim 10 or 11, characterised in that the mandrel (51) comprises an application face (510) of the intermediate panel (5) on means for supporting or maintaining (54) the forming machine for at least some of the surface of the intermediate panel, the mandrel being in a retracted position, wherein the distance between the application face (510 of the intermediate panel and the upper face (511) opposite the mandrel is less than the width of the box or part of box to be obtained, when the blank (1) coming from the glue-application workstation (40) is positioned under the mandrel, and in a forming position, wherein the outer cross section of the mandrel corresponds to the inner cross section of the box or part of box to be obtained, once the intermediate panel on the support or maintenance means, to press said intermediate panel (5) on the support or maintenance means (54) by means of the application face (510) of the mandrel.
  13. Method according to claim 12, characterised in that the blank (1) is brought in from the glue-application workstation (40) under the mandrel (51) by a translation movement of direction parallel to the folding lines (8 to 10) between the panels of the blank, the mandrel (51) being arranged at the secured workstation.
  14. Method according to claim 13, characterised in that the blank is secured by suction with the means (43) ensuring the translation movement thereof to ensure the precise positioning thereof under the mandrel.
  15. Machine for forming a box or a part of box of polygonal cross section comprising a glue-application workstation (40) wherein a blank (1) made of material in sheet form, comprising a set of panels (3 to 6) connected to one another by parallel folding lines (8 to 10) and provided with side flaps (13, 16a to 16d), connected respectively to said panels by folding lines (14) perpendicular to the folding lines (8 to 10) connecting said panels, the free edge of one (6) of the extreme panels of said set of panels being provided with a tab (7) connected to said extreme panel by a folding line (11) parallel to the folding lines (8 to 10) connecting said panels, is glued at least, on the one hand, on two side flaps (16a, 16d) and on the other hand, on the tab (7) of an extreme panel (6) or in the proximity of the free edge of the extreme panel (3) opposite said tab and a forming workstation (50) comprising the shaping device according to one of claims 1 to 9.
  16. Method for forming a box or a part of box of polygonal cross section from a blank (1) comprising a set of panels (3 to 6) connected to one another by parallel folding lines (8 to 10) and provided with side flaps (13, 16a to 16d), connected respectively to said panels by folding lines (14) perpendicular to the folding lines (8 to 10) connecting said panels, wherein the blank is glued in a glue-application workstation (40) then shaped around a mandrel (50) by implementing the method according to one of claims 10 to 14.
  17. Method for successively, automatically forming boxes or parts of boxes implementing a method according to any one of claims 10 to 14, characterised in that the blank n-1 is formed during the gluing of the blank n.
EP17792122.8A 2016-10-11 2017-10-09 Method and device for shaping a blank around a mandrel Active EP3526024B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1659819A FR3057201B1 (en) 2016-10-11 2016-10-11 METHOD AND DEVICE FOR FORMING A FLAN AROUND A CHUCK.
PCT/FR2017/052758 WO2018069614A1 (en) 2016-10-11 2017-10-09 Method and device for shaping a blank around a mandrel

Publications (2)

Publication Number Publication Date
EP3526024A1 EP3526024A1 (en) 2019-08-21
EP3526024B1 true EP3526024B1 (en) 2020-09-16

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US (1) US11097504B2 (en)
EP (1) EP3526024B1 (en)
JP (1) JP6985383B2 (en)
KR (1) KR102510979B1 (en)
CA (1) CA3039854A1 (en)
ES (1) ES2837032T3 (en)
FR (1) FR3057201B1 (en)
PH (1) PH12019501052A1 (en)
WO (1) WO2018069614A1 (en)

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CN113799432B (en) * 2021-08-25 2023-06-16 广东信一科技有限公司 Automatic three-dimensional box folding machine and box folding method
CN114889210B (en) * 2022-03-25 2023-09-26 什邡洪熙包装有限公司 Wine box apparatus for producing of leak protection end

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US11097504B2 (en) 2021-08-24
US20190232596A1 (en) 2019-08-01
JP6985383B2 (en) 2021-12-22
FR3057201A1 (en) 2018-04-13
EP3526024A1 (en) 2019-08-21
KR102510979B1 (en) 2023-03-16
JP2019529190A (en) 2019-10-17
PH12019501052A1 (en) 2019-12-02
CA3039854A1 (en) 2018-04-19
WO2018069614A1 (en) 2018-04-19
KR20190069489A (en) 2019-06-19
ES2837032T3 (en) 2021-06-29
FR3057201B1 (en) 2018-11-02

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