EP3526024A1 - Method and device for shaping a blank around a mandrel - Google Patents

Method and device for shaping a blank around a mandrel

Info

Publication number
EP3526024A1
EP3526024A1 EP17792122.8A EP17792122A EP3526024A1 EP 3526024 A1 EP3526024 A1 EP 3526024A1 EP 17792122 A EP17792122 A EP 17792122A EP 3526024 A1 EP3526024 A1 EP 3526024A1
Authority
EP
European Patent Office
Prior art keywords
flaps
mandrel
blank
box
flap
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.)
Granted
Application number
EP17792122.8A
Other languages
German (de)
French (fr)
Other versions
EP3526024B1 (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
Original Assignee
DS Smith Packaging France SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 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
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • 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
    • B31B50/60—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, to obtain a box or part of box polygonal section.
  • It also relates to a process for forming a blank of sheet material.
  • This blank conventionally comprises a sequence of at least three parts, namely two extreme 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 lateral 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 shutters.
  • the blank has three flaps, it allows to obtain a part of a box (cover or bottom). When it has at least four parts, it makes it possible to obtain a box.
  • an adhesive is deposited on one side, 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 said tongue. Then, the flaps are wound around a mandrel with a polygonal section whose external cross section 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 boxes.
  • the shaping of the blank around the mandrel is carried out using a movable element capable of moving in translation, perpendicularly 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.
  • Fixing the tongue against the free edge of the end flap opposite to the tongue, folding the flaps on the same side of the flaps against a corresponding end face of the mandrel and fixing the folded flaps to each other are made by an articulated arm and cylinders also integral with the frame.
  • the object of the invention is to overcome 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 able to 'simplified design and / or implementation.
  • the invention proposes in particular a device for 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 sequence of least three, to two extreme shutters on either side of at least one intermediate shutter, said shutters being connected to each other by parallel fold lines and provided with lateral flaps, respectively connected to said shutters by fold lines perpendicular to the lines bending connecting said flaps, the free edge of one of the end flaps being provided with a tab connected to said end flap by a folding line parallel to the fold lines connecting said flaps, said blank being pre-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 to said tongue, the device comprising:
  • winding means of the flaps and the means for fixing the tongue are supported by two nacelles secured to the frame of the device and disposed on either side of the mandrel, transversely and symmetrically with respect to the direction of supply of the blank from the sizing station.
  • Part of a box is in particular a lid or a bottom.
  • one or more of the following provisions are also and / or in addition:
  • each nacelle comprises means provided with a sliding surface for folding a flap of the blank on one of two opposite side faces of the mandrel and respectively, for one of the nacelles, means for folding down 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 moving vertically and transversely the winding means;
  • the means for folding a flap comprises a first articulated arm mounted rotatably 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 edge; free of the extreme shutter in opposite; - At least a portion of the flaps folding means is also supported by the two nacelles;
  • the device comprises means for supporting or holding 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 holding means, the faces side and an upper face opposite to the application face;
  • the mandrel is movable between a first forming position of the box or part of a box, in which its external cross-section corresponds to the internal cross-section of the box or part of the box 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 portion of the box to be obtained;
  • the distance between the application face and the opposite face of the mandrel is adjustable
  • the invention also relates to a method of shaping a blank of sheet material around a mandrel to obtain a box or part of box with polygonal section, said blank comprising a sequence of at least three parts, to namely two extreme flaps on either side of at least one intermediate flap, said flaps being connected to each other by parallel fold lines and provided with lateral flaps, respectively connected 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, process implementing a device provided with a frame and in which the blank is previously glued to a sizing station of the device, the flaps are wound around a mandrel with a polygonal section whose external cross section corresponds to the internal cross section of the box or of the box part to be obtained, the tongue is fixed against the free edge of the other end flap resting on the upper face of the mandrel, the flaps lying on the same side
  • the mandrel comprises an application face of the intermediate flap on support or holding means of the forming machine for at least a 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 coming from the gluing station is positioned under the mandrel, and in a position of forming, 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, for pressing said intermediate flap on the means of support 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 of direction parallel to the fold lines between the flaps of the blank, the mandrel being arranged 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.
  • 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 lateral 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 flap assembly being provided with a tongue connected to said end flap by a folding line parallel to the fold lines connecting said flaps, is glued at least to one part 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 box portion 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, wherein the blank is glued in a gluing station and then shaped around a mandrel by implementing the forming process described above.
  • the invention finally relates to a method of automatically sequential 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 gluing of the blank n.
  • FIG. 1 shows in plan view an embodiment of a blank that can be used with the method and the sizing device according to the invention.
  • Figure 2 is a perspective view of a polygonal section box forming machine, from the blank shown in Figure 1, including a sizing device according to the invention.
  • 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 routing of the blanks.
  • Figures 4 and 5 are top views of the machine shown in Figure 2, Figure 5 differing from Figure 4 in that it also shows blanks being processed on the machine.
  • Figure 6 is a cross sectional view of the forming station illustrating the mandrel in the retracted position.
  • Figure 7 is a view similar to Figure 6 showing the mandrel in the forming position.
  • Figure 8 is a perspective view showing the two nacelles of the forming station.
  • Figure 9 is a side view of one of the nacelles.
  • Figures 10 to 14 are transverse views illustrating the various steps of forming the blank on the mandrel.
  • FIG. 1 shows a blank 1 of double-sided corrugated cardboard, for example of low grammage ( ⁇ 250 g / m 2) for example of thickness 3 mm intended to form a box.
  • It comprises a sequence 2 of four rectangular main flaps 3, 4, 5, 6 terminated by a gluing tab 7 and interconnected by first fold lines parallel to one another, 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.
  • the shutters 3 and 6 are called extreme shutters and the shutters 4 and 5, intermediate shutters.
  • the blank comprises, in a manner known per se, 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 adapted to form the top of the box after filling and a second set 15 flaps 16a to 16d rectangular or substantially rectangular also connected to the main flaps by second fold lines 14 and fit to form the bottom of the box.
  • the method and the device according to the invention can also use variants of the blank illustrated in Figure 1 and in particular a blank having rectangular main flaps interconnected by rectangular side flaps.
  • FIGS. 2 to 5 describe a machine for forming a box with a polygonal section from the blank shown in FIG. 1, this machine comprising a sizing device according to the embodiment of FIG. 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 carrying subsets or independent modules, assembled to ensure the formation of a box from the blank shown 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.
  • the posts 22 of the frame can be provided an electrical cabinet that includes a programmable machine control 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 allow to maintain a blank ready to be fed in front portion 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 scrolling blanks.
  • This module 30 also comprises means 35 (see FIG. 3) for unstacking the blanks 1 from the magazine 31.
  • the gluing module 40 comprises a sizing device with a flat support 41, such as a table, intended to receive a blank 1. On the longitudinal edges of this table 41, there are provided lugs 410 fixed with respect to the table, to ensure 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 form tool, around which the blank previously glued by the sizing device will be formed.
  • transfer means 43 comprising a system of articulated arms situated under the table 41 and capable of grasping a blank from below by means of FIG. aspiration.
  • the forming module 50 (see FIG. 4) comprises two pods 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 delivery. flan from the gluing station.
  • nacelles comprise, in the example illustrated in Figures 2 to 5, the winding means of the flaps and the tongue of the fixing means.
  • the extraction module 60 comprises an extraction station for extracting a box or portion of polygonal section box from the mandrel 51 where it has been formed, by means of an extraction device 61, an evacuation station comprising the two conveyors 62, 63 and a station for transferring the boxes or parts of the box from the extraction station to the evacuation station.
  • the forming module 50 will now be described in more detail with reference to FIGS. 6 to 14.
  • FIG. 6 illustrates the mandrel 51 and the blank 1, previously glued to the gluing station 40.
  • the mandrel and the blank are here shown 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 situated to the right in the direction of movement of the blank 1 inside the machine 20 and to the left in FIG.
  • lines of adhesive have been deposited near the free edge of the flap 3, and on the flaps 16a and 16c. These lines of adhesive were deposited on the upper face of the blank which is illustrated in FIG.
  • This upper face is that facing the mandrel 51 in Figure 6 and is opposite to the underside which is the printed face of the blank.
  • the invention is not limited to this mode of implementation.
  • the deposition of the adhesive lines could be performed on the underside of the blank, that is to say the one facing the table 41, the printed face of the blank then forming its upper face.
  • the adhesive lines will be deposited on the flaps 16b and 16d.
  • the blank 1 is moved from the gluing station 40 to 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.
  • FIG. 6 thus illustrates the blank 1 after its positioning under the mandrel 51 thanks to the transfer means 43 and its recovery and maintenance by support means 54 and 55, located under the mandrel 51 and on which the blank 1 bears by its underside, when the means 43 left the forming station to return to the sizing station.
  • these support means are in contact with at least a portion of the surface of the intermediate flap 5 and the end flap 3.
  • Other solutions for supporting and / or maintaining the blank 1 can be envisaged without departing from the scope of the present invention.
  • FIG. 6 shows that the support means 54 located under the mandrel comprise two lateral pavers 540 and 541 and an intermediate support 542.
  • the mandrel 51 comprises an application face 510 intended to face the blank 1, an upper face 511, opposite to the application face 510 on which the main flap 3 will be plated, and side faces 512 and 513, on which will be wound the main flaps 4 and 6, and an end face 514 on which will be folded the side flaps 16a to 16d.
  • the faces of the mandrel may be formed by plates or angle brackets, in a manner known per se.
  • edges are straight lines.
  • the mandrel 51 has corners cut edges so that the secondary flaps form the beveled corners of the box obtained after forming.
  • the distance between the application face 510 of the mandrel and its opposite face 511 is smaller than the width of the box that 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 external cross-section of the mandrel corresponds to the internal 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, thanks to appropriate means such as cylinders 515. however not limited to this embodiment and variants could be envisaged without departing from its scope.
  • lateral 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.
  • the forming of the box around the mandrel is carried out by the nacelles 52 and 53 which will be described in more detail with reference to FIGS. 8 and 9.
  • these two nacelles are secured to the frame 21 of the machine and are arranged on either side of the mandrel (not shown in Figure 8), transversely and symmetrically with respect to the direction of feed of the blank from the gluing station.
  • 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 the shutters 3 and 4.
  • Each nacelle 52, 53 comprises a system of articulated arms 56, 57 made 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, rotatably mounted around the axis 562, 572 common to the two main arms 560, 570.
  • the intermediate arms 563, 573 are mounted to rotate on an axis 564, 574 common to two secondary arms 565, 575.
  • rods 566, 576, respectively 567, 577 double each of the main arms 560, 570, respectively each of the secondary arms 565, 575.
  • the end of the secondary arms 565, 575 and rods 567, 577, opposite the intermediate arms 563, 573, is provided with support means 568, 578 for a lateral liner 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 positioned under the mandrel 51. They are designed to ensure the winding of the flap 6, 4 and its plating against the mandrel 51.
  • the nacelle 52 supports means 523 for breaking and folding the tongue 7 around the fold line 11 and means 524 to ensure the attachment of the flap 3 on the tongue 7, once folded.
  • the means 523 are provided near the top 5220 of the sliding surface. They may be formed of an actuator having the shape of a comb with three teeth, each of them being capable of passing through an orifice 5230.
  • the means 524 comprise two arms 5240 (second articulated arm) substantially parallel and having a general shape in L.
  • These two arms 5240 are rotatably mounted on the lateral plater 521, about a common axis 5241 which extends substantially longitudinally, by the free end of the first leg of L.
  • this axis 5241 is located at the rear of the lateral liner, with respect 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 flow 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 supports a set 533 for winding the main flap 4 around the mandrel.
  • This set comprises two arms 5330 substantially parallel and mounted in rotation about a common axis 5331 which is substantially longitudinal.
  • This axis 5331 is situated substantially at the upper end 5320 of the sliding surface 532 of the lateral plater 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 facing 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, materialized by the arrow F. It is located substantially vis-à-vis the arm 525 of the nacelle 52.
  • each nacelle 52, 53 comprises means 526, 536 vis-à-vis to fold the side flaps 16d and 16c, on the end face 514 of the mandrel.
  • These means 526, 536 may consist of a finger capable of passing through a light, 5260, 5360 and actuated by a set of three actuators controlled according to the size of the flaps 16d and 16c.
  • FIG. 9 shows the nacelle 53, viewed from the side.
  • This Figure 9 illustrates the sideplate 531 which supports the plate 5332 and the arm 534.
  • Figure 9 shows the folding means 536 and their actuating means.
  • the nacelle 52 includes drive means of the articulated arm system 56 which is similar.
  • Figure 10 illustrates the relative position of mandrel 51 and blank 1 before forming begins.
  • the flap 5 is 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.
  • FIG. 11 illustrates an intermediate position between the folded position of FIG. 10 and the extended position of FIG. 12.
  • the upper part 5220 of the sliding surface 522 is in contact with the lower face (printed) of the flap 6.
  • the movement of the sliding surface 522 causes the winding of the flap 6 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 flap 4, while the plate 5332 of the assembly 533 is in contact with the lower face of the flap 3.
  • the movement of the sliding surface 532 makes it possible to wind the flap 4 around the mandrel and to bend it around the folding line 8, the plate 5332 making it possible to hold the flap 3 in the extension of the flap 4.
  • 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 plates the flap 4 against the lateral face 513 of the mandrel.
  • the 5330 arms rotate in anti-clockwise around the axis 5331 to fold the flap 3 around the fold line 9.
  • the winding arms 5330 continue their rotation about the axis 5331 in the counterclockwise direction, which ensures the plating of the flap 3 against the upper face 511 of the mandrel with the plate 5332.
  • the folding means 526, 536 are actuated, so as to fold the side flaps 16d and 16b around the fold lines 14 to press against the end face 514 of the mandrel.
  • the arms 525 and 534 are then actuated to fold the upper flap 16a against the side flaps 16b and 16d already folded, by folding around the fold line 14.
  • FIG. 14 illustrates the next step during which the rotation movement of the arms 5240 around the axis 5241 continues, so that the plate 5242 bears on the flap 3 and ensures its fixing on the tongue 7, by pressing, thanks to the adhesive present near the free edge of the shutter 3.
  • the folding means 523 would then be actuated only after the assembly 533. Thus, it would first proceed to the plating of the flap 3 against the upper face 511 of the mandrel and then the folding of the tongue 7 around the fold line 11, thanks to Means 523. Finally, the arms 5240 would be actuated so as to press the tongue 7 against the flap 3 to ensure their attachment through the adhesive on the tongue.
  • the nacelle 53 can initiate its movement to the folded position.
  • the nacelle 52 will also initiate its movement to the folded position and the two nacelles 52 and 53 will then be in the folded position shown in Figure 10, the arms 5240 having tilted to the rear, through a rotational movement in the counterclockwise direction about the axis 5241.
  • the forming of a new blank around the mandrel 51 may then intervene.
  • Means are also provided to fold the flap 16c around the fold line 14 and to fix it against the flaps 16b and 16d already folded against the end face 514 of the mandrel.
  • the device according to the invention therefore does not require any adjustment to ensure its proper operation.
  • a first blank 1 is extracted and tilted horizontally.
  • the blank being stationary, adhesive lines 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 sizing station to the forming station and is carried out, during this transfer, the deposition of a line of adhesive near the free edge of the flap 3 or on the tongue 7.
  • the blank 1 being positioned under the mandrel, it is wound around the mandrel, here by means of two pods 52 and 53 previously described.
  • the shutter 3 is glued on the tongue 7 and the lateral flaps 16a and 16c are glued on the flaps 16b and 16d to form the bottom of the box on the end face 510 of the mandrel.
  • the latter is turned on the side of the extraction module 60.
  • the latter extracts, by any appropriate 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 in the context of a successive and automatic forming of boxes or box parts, so that the blank 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 and in particular those in which the means for moving the blank under the mandrel are formed by a mat integral with the means for positioning the blank in a precise manner for the gluing.

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Abstract

The present invention relates to a device for shaping a blank (1) of material in sheet form around a mandrel, in order to obtain a box or part of box of polygonal cross section, comprising: – a mandrel, – means for wrapping around the mandrel, – means for securing the tab, – means for folding the flaps, and – means for fixing together the flaps thus folded. The means for wrapping the panels and the means for securing the tab are supported by two cradles positioned one on each side of the mandrel, transversely and symmetrically with respect to the direction in which the blank is brought in from the glue-application workstation.

Description

PROCEDE ET DISPOSITIF DE MISE EN FORME D ' UN FLAN AUTOUR D ' UN MANDRIN  METHOD AND DEVICE FOR FORMING A FLAN AROUND A CHUCK
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, to obtain a box or part of box polygonal section.
Elle concerne également un procédé de mise en forme d'un flan de matière en feuille.  It also relates to a process for forming 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 sequence of at least three parts, namely two extreme 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 lateral 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 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 allows to obtain a part of a box (cover 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. 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. To obtain a box or part of a box, an adhesive is deposited on one side, 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 said tongue. Then, the flaps are wound around a mandrel with a polygonal section whose external cross section 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 boxes.
On connaît déjà de nombreux procédés et dispositifs de mise en forme d'un flan autour d'un mandrin .  Numerous methods and devices for forming a blank around a mandrel are already known.
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' entraînement . 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.  It is particularly possible to cite the document EP 0 334 707 which describes a method and a device consisting of taking the blanks successively in a magazine and placing them on a table provided with driving fingers. They slide the blank on the table to bring it under the mandrel. During the transfer to the mandrel, the blank encounters gluing devices arranged 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 movable element capable of moving in translation, perpendicularly 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.  Fixing the tongue against the free edge of the end flap opposite to the tongue, folding the flaps on the same side of the flaps against a corresponding end face of the mandrel and fixing the folded flaps to each other are made by an articulated arm and cylinders also integral with the frame.
De nombreuses variantes de ce dispositif ont été proposées et elles apportent globalement satisfaction .  Many variants of this device have been proposed and they provide overall satisfaction.
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 entraînent 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 precisely to be able to ensure correct formatting of the blank and which also cause significant 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 overcome 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 able to '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 : For this purpose, the invention proposes in particular a device for 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 sequence of least three, to two extreme shutters on either side of at least one intermediate shutter, said shutters being connected to each other by parallel fold lines and provided with lateral flaps, respectively connected to said shutters by fold lines perpendicular to the lines bending connecting said flaps, the free edge of one of the end flaps being provided with a tab connected to said end flap by a folding line parallel to the fold lines connecting said flaps, said blank being pre-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 to said tongue, the device comprising:
-un bâti,  -a frame,
-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,  a mandrel with a polygonal section whose external cross-section corresponds to the internal cross-section of the box or part of the box to be obtained;
-des moyens d'enroulement des volets et de la languette autour du mandrin,  means for winding the flaps and the tongue around the mandrel,
-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,  means for fixing the tongue against the free edge of the end flap opposite to the tongue; means for folding the flaps lying on the same side of said flaps against a corresponding end face of the mandrel and
-des moyens pour fixer les uns aux autres les rabats ainsi repliés,  means for fastening the folded flaps to each other,
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. characterized in that the winding means of the flaps and the means for fixing the tongue are supported by two nacelles secured to the frame of the device and disposed on either side of the mandrel, transversely and symmetrically with respect to the direction of supply of the blank from the sizing station.
Une partie de boîte est notamment un couvercle ou un fond.  Part of a box is in particular a lid or a bottom.
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 :  In advantageous embodiments, one or more of the following provisions are also and / or in addition:
- 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 ;  - The winding means of each nacelle comprises means provided with a sliding surface for folding a flap of the blank on one of two opposite side faces of the mandrel and respectively, for one of the nacelles, means for folding down 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 moving vertically and transversely the winding means;
- les moyens pour rabattre un volet comprennent un premier bras articulé, monté mobile en rotation sur les moyens munis d'une surface de glissement ;  - The means for folding a flap comprises a first articulated arm mounted rotatably on the means provided with a sliding surface;
- 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 ; 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 edge; free of the extreme shutter in opposite; - At least a portion of the flaps folding means is also supported by the two 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 ;  the device comprises means for supporting or holding 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 holding means, the faces side and an upper face opposite to the application face;
- 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 ;  the mandrel is movable between a first forming position of the box or part of a box, in which its external cross-section corresponds to the internal cross-section of the box or part of the box 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 portion of the box to be obtained;
- la distance entre la face d'application et la face opposée du mandrin est réglable ;  the distance between the application face and the opposite face of the mandrel is adjustable;
- les arêtes du mandrin sont à coins coupés.  - 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 box with polygonal section, said blank comprising a sequence of at least three parts, to namely two extreme flaps on either side of at least one intermediate flap, said flaps being connected to each other by parallel fold lines and provided with lateral flaps, respectively connected 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, process implementing a device provided with a frame and in which the blank is previously glued to a sizing station of the device, the flaps are wound around a mandrel with a polygonal section whose external cross section corresponds to the internal cross section of the box or of the box part to be obtained, the tongue is fixed against the free edge of the other end flap resting on the upper face of the mandrel, the flaps lying on the same side of said flaps being 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 the tongue and the fixat Ion said tongue result from translational movements and rotation carried 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 feeding the blank from the sizing 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 ; Advantageously, it is also and / or moreover recourse to one and / or the other of the following provisions: - Folding at least a portion of the flaps is also performed from means supported by the 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.  the mandrel comprises an application face of the intermediate flap on support or holding means of the forming machine for at least a 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 coming from the gluing station is positioned under the mandrel, and in a position of forming, 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, for pressing said intermediate flap on the means of support or holding by means of the application face of the mandrel.
- 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 ;  the blank is brought from the gluing station under the mandrel by a translational movement of direction parallel to the fold lines between the flaps of the blank, the mandrel being arranged at a fixed station;
- le flan est solidarisé par aspiration avec les moyens assurant son mouvement de translation pour assurer son positionnement précis sous le mandrin.  - 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 lateral 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 flap assembly being provided with a tongue connected to said end flap by a folding line parallel to the fold lines connecting said flaps, is glued at least to one part 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 box portion 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, wherein the blank is glued in a gluing station and then shaped around a mandrel by implementing the forming 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 automatically sequential 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 gluing of the blank n.
L' invention sera mieux comprise et ses avantages apparaîtront 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 :  The invention will be better understood and its advantages will appear more clearly on reading the following description of embodiments given as non-limiting examples. The description refers to the accompanying drawings in which:
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.  FIG. 1 shows in plan view an embodiment of a blank that can be used with the method and the sizing device according to the 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.  Figure 2 is a perspective view of a polygonal section box forming machine, from the blank shown in Figure 1, including a sizing device according to the 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.  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 routing of the blanks.
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 .  Figures 4 and 5 are top views of the machine shown in Figure 2, Figure 5 differing from Figure 4 in that it also shows blanks being processed on the machine.
La figure 6 est une vue transversale du poste de formage, illustrant le mandrin en position rétractée.  Figure 6 is a cross sectional view of the forming station illustrating the mandrel in the retracted position.
La figure 7 est une vue similaire à la figure 6 représentant le mandrin en position de formage.  Figure 7 is a view similar to Figure 6 showing the mandrel in the forming position.
La figure 8 est une vue en perspective représentant les deux nacelles du poste de formage.  Figure 8 is a perspective view showing the two nacelles of the forming station.
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. Figure 9 is a side view of one of the nacelles. Figures 10 to 14 are transverse views illustrating the various steps of forming the blank on the mandrel.
Les éléments communs aux différentes figures seront désignés par les mêmes références.  The elements common to the different 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.  FIG. 1 shows a blank 1 of double-sided corrugated cardboard, for example of low grammage (<250 g / m 2) for example of thickness 3 mm intended to form a box.
II 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 sequence 2 of four rectangular main flaps 3, 4, 5, 6 terminated by a gluing tab 7 and interconnected by first fold lines parallel to one another, 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.  The shutters 3 and 6 are called extreme shutters and the shutters 4 and 5, intermediate shutters.
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 per se, 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 adapted to form the top of the box after filling and a second set 15 flaps 16a to 16d rectangular or substantially rectangular also connected to the main flaps by second fold lines 14 and fit to form 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 in Figure 1 and in particular a blank having rectangular main flaps interconnected by rectangular side flaps.
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 extreme flaps to obtain a box portion.
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.  Reference is first made to FIGS. 2 to 5 to describe a machine for forming a box with a polygonal section from the blank shown in FIG. 1, this machine comprising a sizing device according to the embodiment of FIG. 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 carrying subsets or independent modules, assembled to ensure the formation of a box from the blank shown 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.  This is the blank storage-unstacking module 30, the module 40 for gluing the blanks, 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. 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 . Thus, the frame 21 provides the connection between the two end modules, namely the storage-unstacking module 30 and the extraction module 60. In the posts 22 of the frame, can be provided an electrical cabinet that includes a programmable machine control 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 chaînes modulaires 32 entraînées 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 chaînes 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 allow to maintain a blank ready to be fed in front portion 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 scrolling 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 comprises means 35 (see FIG. 3) for unstacking the blanks 1 from the magazine 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 sizing device with a flat support 41, such as a table, intended to receive a blank 1. On the longitudinal edges of this table 41, there are provided lugs 410 fixed with respect to the table, to ensure 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. 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 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 form 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.  In order to move the blank 1 from the gluing device to the mandrel 51, there are provided transfer means 43 comprising a system of articulated arms situated under the table 41 and capable of grasping a blank from below by means of FIG. 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 (see FIG. 4) comprises two pods 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 delivery. flan 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 in Figures 2 to 5, the winding means of the flaps and the tongue of the fixing means.
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 portion of polygonal section box from the mandrel 51 where it has been formed, by means of an extraction device 61, an evacuation station comprising the two conveyors 62, 63 and a station for transferring the boxes or parts of the box from the extraction station to the evacuation 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 reference to FIGS. 6 to 14.
La figure 6 illustre le mandrin 51 et le flan 1, précédemment encollés au poste d'encollage 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. FIG. 6 illustrates the mandrel 51 and the blank 1, previously glued to the gluing station 40. The mandrel and the blank are here shown 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 situated to the right in the direction of movement of the blank 1 inside the machine 20 and to the left in FIG.
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 that will be described, lines of adhesive have been deposited near the free edge of the flap 3, and on the flaps 16a and 16c. These lines of adhesive were deposited on the upper face of the blank which is illustrated in FIG.
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 that facing the mandrel 51 in Figure 6 and is opposite to the underside 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 deposition of the adhesive lines could be performed on the underside of the blank, that is to say the one facing the table 41, the printed face of the blank then forming its upper face.
Dans ce cas, les lignes d'adhésif seront déposées sur les rabats 16b et 16d.  In this case, the adhesive lines 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 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'entraînement. 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 allow in particular to remove the set of lateral guides which must be present when the transfer is effected for example by means of driving fingers. They also remove the front stop which is normally provided to properly position 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.  FIG. 6 thus illustrates the blank 1 after its positioning under the mandrel 51 thanks to the transfer means 43 and its recovery and maintenance by support means 54 and 55, located under the mandrel 51 and on which the blank 1 bears by its underside, when the means 43 left the forming station to return to the sizing 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 illustrated in Figure 6, these support means are in contact with at least a portion of the surface of the intermediate flap 5 and the end flap 3. Other solutions for supporting and / or maintaining the blank 1 can be envisaged without departing from 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.  FIG. 6 shows that the support means 54 located under the mandrel comprise two lateral pavers 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 face the blank 1, an upper face 511, opposite to the application face 510 on which the main flap 3 will be plated, and side faces 512 and 513, on which will be wound the main flaps 4 and 6, and an end face 514 on which will be folded the side flaps 16a to 16d.
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 may be formed by plates or angle brackets, in a manner known per se.
Dans les exemples illustrés sur les figures, les arêtes sont des lignes droites.  In the examples shown 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 has rectangular secondary flaps between the main flaps, the mandrel 51 has corners cut edges so that the secondary flaps form the beveled corners 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 FIGS. 6 and 7, it will be understood that the mandrel 51 is movable between a retracted position illustrated in FIG. 6 and a forming position, illustrated in FIG. 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 illustrated in FIG. 6, the distance between the application face 510 of the mandrel and its opposite face 511 is smaller than the width of the box that 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 illustrated in FIG. 7, the external cross-section of the mandrel corresponds to the internal 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 in FIGS. 6 and 7, the distance between the application face 510 and the opposite face 511 of the mandrel is adjustable, thanks to appropriate means such as cylinders 515. however not limited to this embodiment and variants could be envisaged without departing from its scope.
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 is understood that the lateral 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 carried out by the nacelles 52 and 53 which will be described in more detail with reference to FIGS. 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 secured to the frame 21 of the machine and are arranged on either side of the mandrel (not shown in Figure 8), transversely and symmetrically with respect to the direction of feed 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 routed inside the machine 20 is illustrated by the arrow F in FIG.
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 the 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 made 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, rotatably mounted around 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 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 rods 566, 576, respectively 567, 577 double each of 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 rods 567, 577, opposite the intermediate arms 563, 573, is provided with support means 568, 578 for a lateral liner 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 positioned under the mandrel 51. They are designed to ensure the winding of the flap 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 pods are designed to support all means for 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 tongue 7 around the fold line 11 and means 524 to ensure the attachment of the flap 3 on the tongue 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 top 5220 of the sliding surface. They may be formed of an actuator having the shape of a comb with three teeth, each of them being capable of passing 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 shape in L.
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 rotatably mounted on the lateral plater 521, about a common axis 5241 which extends substantially longitudinally, by the free end of the first leg of 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 lateral liner, with respect 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 leg of the L, opposite 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 flow 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 supports a set 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 set comprises two arms 5330 substantially parallel and mounted in rotation about a common axis 5331 which is substantially longitudinal. This axis 5331 is situated substantially at the upper end 5320 of the sliding surface 532 of the lateral plater 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 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.  Moreover, the nacelle 53 also supports an articulated arm 534 which is intended to fold down the side flap 16a (in the upper position and facing 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, materialized by the arrow F. It is located substantially vis-à-vis 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 vis-à-vis to fold 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 may consist of a finger capable of passing through a light, 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 FIG. 9 which shows the nacelle 53, viewed from the side.
Cette figure 9 illustre le plaqueur latéral 531 qui supporte la plaque 5332 et le bras 534.  This Figure 9 illustrates the sideplate 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 .  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 belts 575 which generate the movement of the articulated arm system 57, thanks to the engine 578.
La nacelle 52 comporte des moyens d' entraînement du système de bras articulés 56 qui est similaire.  The nacelle 52 includes drive means of 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. 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. 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, during the winding of the flaps on the mandrel. Reference is now made to FIGS. 10 to 14 to explain the various steps of forming a blank around the mandrel 51, using the two nacelles 52 and 53.
La figure 10 illustre la position relative du mandrin 51 et du flan 1 avant que le formage ne commence .  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 that illustrated in Figure 7. It is understood that the blank 1 must be positioned accurately with respect to the mandrel 51. Indeed, the winding of the flaps is performed after plating the blank 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 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 achieved.
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 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 FIG.
Ces deux systèmes sont ensuite commandés pour passer dans la position déployée illustrée à la figure 12.  These two systems are then controlled to move into the deployed position illustrated 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 moving from the folded position to the deployed position, the rotational movements of the main and secondary arms as well as the intermediate arms print to each lateral tacker 521, 531 a combined movement upwards and inwards 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.  FIG. 11 illustrates an intermediate position between the folded position of FIG. 10 and the extended position of FIG. 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 face (printed) of the flap 6. The movement of the sliding surface 522 causes the winding of the flap 6 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.  Similarly, the upper part 5320 of the sliding surface 532 is in contact with the flap 4, while the plate 5332 of the assembly 533 is in contact with the lower face of the flap 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 flap 4 around the mandrel and to bend it around the folding line 8, the plate 5332 making it possible to hold the flap 3 in the extension of the flap 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 nacelles shown in Figure 12, the flap 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 plates the flap 4 against the lateral face 513 of the mandrel. In addition, the 5330 arms rotate in anti-clockwise around the axis 5331 to fold the flap 3 around the 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 illustrated in FIG. 13, the two nacelles 52, 53 remain in the deployed position illustrated in FIG. 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 about the axis 5331 in the counterclockwise direction, which ensures the plating of the flap 3 against the upper face 511 of the mandrel with 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 5240 arms move around the 5241 shaft, clockwise.
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 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 upper 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.  FIG. 14 illustrates the next step during which the rotation movement of the arms 5240 around the axis 5241 continues, so that the plate 5242 bears on the flap 3 and ensures its fixing on the tongue 7, by pressing, thanks 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 procéderait 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 adhesive line was not present near the free edge of the flap 3 but on the upper face of the tongue, the folding means 523 would then be actuated only after the assembly 533. Thus, it would first proceed to the plating of the flap 3 against the upper face 511 of the mandrel and then the folding of the tongue 7 around the fold line 11, thanks to Means 523. Finally, the arms 5240 would be actuated so as to press the tongue 7 against the flap 3 to ensure their attachment through the adhesive 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 in Figure 14, when the plate 5242 provides the attachment between the tongue 7 and the flap 3, the nacelle 53 can initiate its movement to 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 achieved the fixing of the tongue 7 on the flap 3, the nacelle 52 will also initiate its movement to the folded position and the two nacelles 52 and 53 will then be in the folded position shown in Figure 10, the arms 5240 having tilted to the rear, through a rotational movement in the counterclockwise direction about the axis 5241. The forming of a new blank around the mandrel 51 may then intervene.
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 to fold the flap 16c around the fold line 14 and to fix 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. 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. These means are not illustrated in detail in the figures because they are conventional. They can be carried by lateral platers 521, 531 or be provided for example on the extractor means 61 of the extraction module 60. Thus, all the means ensuring the shaping of the blank around the mandrel, the tab attachment against the free edge of the end flap opposite the tongue and the folding of at least two flaps on the same side of the flaps against one side end of the mandrel are carried by the nacelles 52, 53 and in particular by the lateral platers 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 proper 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.  Moreover, the fact that all these means are grouped together on the nacelles makes it possible to limit the space requirement 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'entraîner les plaqueurs latéraux ou des mouvements des différents moyens portés par les nacelles .  Note also that all movements are rotational movements, whether movements to drive the side tackers 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. 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. Fixing 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 attachment of all four side flaps which is stronger than when the adhesive is present on the underside of the side flaps 16b and 16d and that the flaps 16a and 16c are folded over them. Finally, insofar as the adhesive is present on the upper face of the blank and the various means carried by the nacelles are in contact with the underside (printed) of the blank, there is no risk that these means come in. contact with previously deposited adhesive lines. This reduces the accuracy requirements in the settings of the various means and in particular the assembly 533 and fastening 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 for forming 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 blank storage magazine 31, a first blank 1 is extracted and tilted horizontally.
On le lâche alors sur la table 41 et on le positionne précisément sur la table 41.  It is then dropped on the table 41 and 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, adhesive lines 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 sizing station to the forming station and is carried out, during this transfer, the deposition of a line of adhesive near the free edge of the flap 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 two pods 52 and 53 previously described.
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 shutter 3 is glued on the tongue 7 and the lateral flaps 16a and 16c are glued on the flaps 16b and 16d to form the bottom of the box on the end face 510 of the mandrel. The latter is turned on the side of 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 appropriate 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 above description also applies to the formation of a box part, in particular a lid 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 in the context of a successive and automatic forming of boxes or box parts, so that the blank 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 1' encollage .  As is obvious and as also follows from the above, the present invention is not limited to the embodiments more particularly described. On the contrary, it encompasses all the variants and in particular those in which the means for moving the blank under the mandrel are formed by a mat integral with the means for positioning the blank in a precise manner for the gluing.

Claims

REVENDICATIONS
1. Dispositif de mise en forme d'un flan (1) de matière en feuille autour d'un mandrin (51), pour obtenir une boîte ou une partie de boîte à section polygonale, ledit flan comportant une suite d'au moins trois volets (3 à 6) , à savoir deux volets extrêmes (3, 6) de part et d'autre d'au moins un volet intermédiaire (4, 5), lesdits volets étant reliés les uns aux autres par des lignes de pliage (8 à 10) parallèles et pourvus de rabats latéraux (13, 16a à 16d), reliés respectivement auxdits volets par des lignes de pliage (14) perpendiculaires aux lignes de pliage (8 à 10) reliant lesdits volets, le bord libre d'un (6) des volets extrêmes étant pourvu d'une languette (7) reliée audit volet extrême par une ligne de pliage (11) parallèle aux lignes de pliage reliant lesdits volets, ledit flan (1) étant préalablement encollé dans un poste d'encollage (40) d'une part sur deux rabats (16a, 16d) et d'autre part, sur la languette (7) du volet extrême ou à proximité du bord libre du volet extrême (3) opposé à ladite languette, le dispositif comprenant : 1. Device for shaping a blank (1) of sheet material around a mandrel (51), to obtain a box or part of box polygonal section, said blank comprising a sequence of at least three flaps (3 to 6), namely two end flaps (3, 6) on either side of at least one intermediate flap (4, 5), said flaps being connected to each other by fold lines ( 8 to 10) parallel and provided with side flaps (13, 16a to 16d), respectively connected to said flaps by fold lines (14) perpendicular to the fold lines (8 to 10) connecting said flaps, the free edge of a (6) end flaps being provided with a tongue (7) connected to said end flap by a fold line (11) parallel to the fold lines connecting said flaps, said blank (1) being pre-glued in a gluing station (40) on the one hand on two flaps (16a, 16d) and on the other hand, on the tab (7) of the end flap or near the free edge of the end flap (3) opposite to said tongue, the device comprising:
-un bâti (21) ,  a frame (21),
-un mandrin (51) à section polygonale dont la section transversale extérieure correspond à la section transversale intérieure de la boîte ou partie de boîte à obtenir,  a mandrel (51) with a polygonal section whose external cross-section corresponds to the internal cross-section of the box or part of the box to be obtained;
-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,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 to the tongue,
-des moyens de repliement des rabats se trouvant du même côté desdits volets contre une face d'extrémité correspondante du mandrin et, means for folding the flaps lying on the same side of said flaps against a corresponding end face of the mandrel and
-des moyens pour fixer les uns aux autres les rabats ainsi repliés,  means for fastening the folded flaps to each other,
caractérisé en ce que les moyens d'enroulement des volets (522 ; 532, 533) et les moyens de fixation (524) de la languette sont supportés par deux nacelles (52, 53) solidaires du bâti (21) du dispositif 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. characterized in that the winding means of the flaps (522; 532, 533) and the means (524) for securing the tongue are supported by two nacelles (52, 53) integral with the frame (21) of the device and arranged in both sides of the mandrel (51), transversely and symmetrically with respect to the direction of supply of the blank from the gluing station.
2. Dispositif selon la revendication 1, caractérisé en ce que les moyens d'enroulement de chaque nacelle comprennent des moyens (521, 531) munis d'une surface de glissement (522, 532) pour rabattre un volet (3, 5) du flan sur l'une de deux faces latérales opposées (512, 513) du mandrin et respectivement, pour l'une des nacelles (53), des moyens (533) pour rabattre un volet (6) et pour l'autre nacelle (52), des moyens (523) pour replier la languette (7) autour de l'arête de la face supérieure du mandrin, les nacelles (52, 53) comprenant chacune un système articulé (56, 57) pour déplacer verticalement et transversalement les moyens d'enroulement.  2. Device according to claim 1, characterized in that the winding means of each nacelle comprises means (521, 531) provided with a sliding surface (522, 532) for folding a flap (3, 5) of blank on one of two opposite side faces (512, 513) of the mandrel and respectively, for one of the pods (53), means (533) for folding one flap (6) and the other basket (52). ), means (523) for folding the tongue (7) around the edge of the upper face of the mandrel, the nacelles (52, 53) each comprising an articulated system (56, 57) for moving vertically and transversely the means winding.
3. Dispositif selon la revendication 2, caractérisé en ce que les moyens (533) pour rabattre un volet (3) comprennent un premier bras articulé (5330) monté mobile en rotation sur les moyens (531) munis d'une surface de glissement (532) . 3. Device according to claim 2, characterized in that the means (533) for folding down a flap (3) comprises a first articulated arm (5330) rotatably mounted on the means (531) provided with a sliding surface (532).
4. Dispositif selon l'une des revendications 2 ou 3, caractérisé en ce que l'autre nacelle (52) supporte également les moyens de fixation (524) de la languette (7), ces moyens comportant un deuxième bras articulé (5240) monté en rotation sur les moyens (521) munis d'une surface de glissement (522) de ladite nacelle et muni de moyens de compression (5242) de la languette contre le bord libre du volet extrême en vis à vis.  4. Device according to one of claims 2 or 3, characterized in that the other nacelle (52) also supports the fixing means (524) of the tongue (7), these means comprising a second articulated arm (5240) mounted in rotation on the means (521) provided with a sliding surface (522) of said nacelle and provided with compression means (5242) of the tongue against the free edge of the end flap in opposite.
5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce qu'au moins une partie des moyens de repliement (525, 526 ; 534, 536) des rabats est également supportée par les deux nacelles (52, 53) .  5. Device according to one of claims 1 to 4, characterized in that at least a portion of the folding means (525, 526; 534, 536) of the flaps is also supported by the two nacelles (52, 53).
6. Dispositif selon l'une des revendications 2 à 5, caractérisé en ce qu'il comprend des moyens de support ou de maintien (54, 55) d'au moins une partie de la surface d'un volet intermédiaire (4) du flan (1) et en ce que le mandrin (51) comprend une face d'application (510) dudit volet intermédiaire sur les moyens de support ou de maintien, des faces latérales (512, 513) et une face supérieure (511) opposée à la face d'application (510).  6. Device according to one of claims 2 to 5, characterized in that it comprises means for supporting or holding (54, 55) at least a portion of the surface of an intermediate flap (4) of blank (1) and in that the mandrel (51) comprises an application face (510) of said intermediate flap on the support or holding means, side faces (512, 513) and an opposite upper face (511). at the application face (510).
7. Dispositif selon la revendication 6, caractérisé en ce que le mandrin (51) 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 (510) du mandrin et sa face opposée (511) est inférieure à la largeur de la boîte ou partie de boîte à obtenir. 7. Device according to claim 6, characterized in that the mandrel (51) is movable between a first forming position of the box or part of box, wherein its outer cross section corresponds to the section inner cross-section of the box or part of box to be obtained and a second retracted position in which the distance between the application face (510) of the mandrel and its opposite face (511) is less than the width of the box or part of a box to obtain.
8. Dispositif selon la revendication 6 ou 7, caractérisé en ce que la distance entre la face d'application (510) et la face opposée (511) du mandrin est réglable.  8. Device according to claim 6 or 7, characterized in that the distance between the application face (510) and the opposite face (511) of the mandrel is adjustable.
9. Dispositif selon l'une des revendications 6 à 8, caractérisé en ce que les arêtes du mandrin sont à coins coupés.  9. Device according to one of claims 6 to 8, characterized in that the edges of the mandrel are cut corners.
10. Procédé de mise en forme d'un flan (1) 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 (3 à 6) , à savoir deux volets extrêmes (3, 6) de part et d'autre d'au moins un volet intermédiaire (4, 5), lesdits volets étant reliés les uns aux autres par des lignes de pliage (8 à 10) parallèles et pourvus de rabats latéraux (13, 16a à 16d), reliés respectivement auxdits volets par des lignes de pliage (14) perpendiculaires aux lignes de pliage (8 à 10) reliant lesdits volets, le bord libre (6) d'un des volets extrêmes étant pourvu d'une languette (7) reliée audit volet extrême par une ligne de pliage (11) parallèle aux lignes de pliage reliant lesdits volets, procédé mettant en œuvre un dispositif muni d'un bâti (21) et dans lequel le flan (1) étant préalablement encollé à un poste d'encollage (40) du dispositif, les volets (3 à 6) sont enroulés autour d'un mandrin (51) à section polygonale dont la section transversale extérieure correspond à la section transversale intérieure de la boîte ou partie de boîte à obtenir, la languette (7) est fixée contre le bord libre de l'autre volet extrême en appui sur la face supérieure (511) 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 (522, 523, 524 ; 532, 533) supportés par deux nacelles (52, 53) solidaires du bâti (21) 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 (40). 10. A method of shaping a blank (1) of sheet material around a mandrel to obtain a box or part of box polygonal section, said blank comprising a sequence of at least three parts (3 to 6), namely two end flaps (3, 6) on each side of at least one intermediate flap (4, 5), said flaps being connected to each other by fold lines (8 to 10). parallel and provided with side flaps (13, 16a to 16d), respectively connected to said flaps by fold lines (14) perpendicular to the fold lines (8 to 10) connecting said flaps, the free edge (6) of one of the extreme shutters being provided with a tongue (7) connected to said end flap by a fold line (11) parallel to the fold lines connecting said shutters, a method using a device provided with a frame (21) and in which the blank (1) being previously glued to a sizing station (40) of the device, the flaps (3 to 6) are wound around a mandrel (51) with a polygonal section whose external cross section corresponds to the internal cross section of the box or part of box to obtain, the tongue (7) is fixed against the free edge of the other end flap bearing on the upper face (511) of the mandrel, the flaps 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 the tongue and the attachment of said tongue result from translational movements and rotation carried out by means (522, 523, 524; 532, 533) supported by two nacelles (52, 53) integral with the frame (21) of the forming device, arranged on either side of the mandrel, transversely and symmetrically with respect to the feed direction of the blank from the sizing station (40).
11. Procédé selon la revendication 10, caractérisé en ce que les repliements d'au moins une partie des rabats est également effectué à partir de moyens (525, 526 ; 534, 536) supportés par les nacelles .  11. The method of claim 10, characterized in that the folds of at least a portion of the flaps is also performed from means (525, 526, 534, 536) supported by the nacelles.
12. Procédé selon la revendication 10 ou 11, caractérisé en ce que le mandrin (51) comprend une face d'application (510) du volet intermédiaire (5) sur des moyens support ou de maintien (54) 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 (510) du volet intermédiaire et la face supérieure (511) opposée du mandrin est inférieure à la largeur de la boîte ou partie de boîte à obtenir, lorsque le flan (1) provenant du poste d'encollage (40) 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 boîte à obtenir, une fois le volet intermédiaire sur les moyens de support ou de maintien, pour presser ledit volet intermédiaire (5) sur les moyens de support ou de maintien (54) au moyen de la face d'application (510) du mandrin. 12. The method of claim 10 or 11, characterized in that the mandrel (51) comprises an application face (510) of the intermediate flap (5) on support means or holding (54) of the forming machine for at least some of the surface of the intermediate flap, the mandrel being in a retracted position, wherein the distance between the application face (510) of the intermediate flap and the opposite upper face (511) of the mandrel is less than the width of the box or part of box to be obtained, when the blank (1) coming from the sizing station (40) is positioned under the mandrel, and in a forming position, in which 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 flap on the support or holding means, for pressing said intermediate flap (5) on the support or holding means (54) by means of the application face (510) chuck.
13. Procédé selon la revendication 12, caractérisé en ce que le flan (1) est amené depuis le poste d'encollage (40) sous le mandrin (51) par un mouvement de translation de direction parallèle aux lignes de pliage (8 à 10) entre les volets du flan, le mandrin (51) étant disposé à poste fixe.  13. The method of claim 12, characterized in that the blank (1) is fed from the sizing station (40) under the mandrel (51) by a translational movement direction parallel to the fold lines (8 to 10). ) between the flaps of the blank, the mandrel (51) being arranged in a fixed position.
14. Procédé selon la revendication 13, caractérisé en ce que le flan est solidarisé par aspiration avec les moyens (43) assurant son mouvement de translation pour assurer son positionnement précis sous le mandrin.  14. The method of claim 13, characterized in that the blank is secured by suction with the means (43) ensuring its translational movement to ensure its precise positioning under the mandrel.
15. Machine de formation d'une boîte ou d'une partie de boîte à section polygonale comprenant un poste d'encollage (40) dans lequel un flan (1) de matière en feuille, comportant un ensemble de volets (3 à 6) reliés les uns aux autres par des lignes de pliage (8 à 10) parallèles et pourvus de rabats latéraux (13, 16a à 16d), reliés respectivement auxdits volets par des lignes de pliage (14) perpendiculaires aux lignes de pliage (8 à 10) reliant lesdits volets, le bord libre d'un (6) des volets extrêmes dudit ensemble de volets étant pourvu d'une languette (7) reliée audit volet extrême par une ligne de pliage (11) parallèle aux lignes de pliage (8 à 10) reliant lesdits volets, est encollé au moins d'une part, sur deux rabats latéraux (16a, 16d) et d'autre part, sur la languette (7) d'un volet extrême (6) ou à proximité du bord libre du volet extrême (3) opposé à ladite languette et un poste de formage (50) comprenant le dispositif de mise en forme selon l'une des revendications 1 à 9. 15. A machine for forming a box or box portion with a polygonal section comprising a sizing station (40) in which a blank (1) of sheet material, comprising a set of shutters (3 to 6) connected to each other by parallel fold lines (8 to 10) and provided with side flaps (13, 16a to 16d), respectively connected to said flaps by fold lines (14) perpendicular to the lines of folding (8 to 10) connecting said flaps, the free edge of one (6) of the end flaps of said flap assembly being provided with a tongue (7) connected to said end flap by a fold line (11) parallel to the lines folding (8 to 10) connecting said flaps, is glued at least on one side, on two lateral flaps (16a, 16d) and on the other hand, on the tongue (7) of an end flap (6) or near the free edge of the end flap (3) opposite said tongue and a forming station (50) comprising the shaping device according to one of claims 1 to 9.
16. Procédé de formation d'une boîte ou d'une partie de boîte à section polygonale à partir d'un flan (1) comportant un ensemble de volets (3 à 6) reliés les uns aux autres par des lignes de pliage (8 à 10) parallèles et pourvus de rabats latéraux (13, 16a à 16d), reliés respectivement auxdits volets par des lignes de pliage (14) perpendiculaires aux lignes de pliage (8 à 10) reliant lesdits volets, dans lequel le flan est encollé dans un poste d'encollage (40) puis mis en forme autour d'un mandrin (50) en mettant en œuvre le procédé selon l'une des revendications 10 à 14.  16. A method of forming a box or box portion with a polygonal section from a blank (1) having a set of flaps (3 to 6) connected to each other by fold lines (8). 10) parallel and provided with side flaps (13, 16a to 16d), respectively connected to said flaps by fold lines (14) perpendicular to the fold lines (8 to 10) connecting said flaps, wherein the blank is glued in a sizing station (40) then shaped around a mandrel (50) implementing the method according to one of claims 10 to 14.
17. Procédé de formage successif automatique de boîtes ou de parties de boîte mettant en œuvre un procédé selon l'une quelconque des revendications 10 à 14, caractérisé en ce que l'on forme le flan n - 1 pendant l'encollage du flan n. 17. A method of automatically sequential forming of boxes or parts of box implementing a Process according to any one of Claims 10 to 14, characterized in that the n-1 blank 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 true EP3526024A1 (en) 2019-08-21
EP3526024B1 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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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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JPS50113380A (en) * 1974-02-22 1975-09-05
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KR20190069489A (en) 2019-06-19
CA3039854A1 (en) 2018-04-19
PH12019501052A1 (en) 2019-12-02
KR102510979B1 (en) 2023-03-16
FR3057201B1 (en) 2018-11-02
EP3526024B1 (en) 2020-09-16
US11097504B2 (en) 2021-08-24
US20190232596A1 (en) 2019-08-01
FR3057201A1 (en) 2018-04-13
WO2018069614A1 (en) 2018-04-19
JP6985383B2 (en) 2021-12-22
JP2019529190A (en) 2019-10-17
ES2837032T3 (en) 2021-06-29

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