EP3224038B1 - Method and device for correcting the folded position of a cut-out in a folding-gluing machine - Google Patents
Method and device for correcting the folded position of a cut-out in a folding-gluing machine Download PDFInfo
- Publication number
- EP3224038B1 EP3224038B1 EP15797862.8A EP15797862A EP3224038B1 EP 3224038 B1 EP3224038 B1 EP 3224038B1 EP 15797862 A EP15797862 A EP 15797862A EP 3224038 B1 EP3224038 B1 EP 3224038B1
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- EP
- European Patent Office
- Prior art keywords
- flap
- edge
- vacuum
- suction cups
- cut
- 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.)
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Images
Classifications
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- 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
- B31B50/003—Straightening the side walls of boxes; Squaring collapsed folded box blanks; Deforming boxes
-
- 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
- B31B50/006—Controlling; Regulating; Measuring; Improving safety
-
- 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
- B31B50/044—Feeding sheets or blanks involving aligning
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
- B31B50/60—Uniting opposed surfaces or edges; Taping
- B31B50/62—Uniting opposed surfaces or edges; Taping by adhesives
- B31B50/624—Applying glue on blanks
-
- 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
-
- 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
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- 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
- B31B2110/00—Shape of rigid or semi-rigid containers
- B31B2110/30—Shape of rigid or semi-rigid containers having a polygonal cross section
- B31B2110/35—Shape of rigid or semi-rigid containers having a polygonal cross section rectangular, e.g. square
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2120/00—Construction of rigid or semi-rigid containers
- B31B2120/30—Construction of rigid or semi-rigid containers collapsible; temporarily collapsed during manufacturing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2120/00—Construction of rigid or semi-rigid containers
- B31B2120/30—Construction of rigid or semi-rigid containers collapsible; temporarily collapsed during manufacturing
- B31B2120/302—Construction of rigid or semi-rigid containers collapsible; temporarily collapsed during manufacturing collapsible into a flat condition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2120/00—Construction of rigid or semi-rigid containers
- B31B2120/70—Construction of rigid or semi-rigid containers having corrugated or pleated walls
Definitions
- the present invention relates to the field of the manufacture of packaging, including packaging made from sheets or strips precut, including paper cuts, plastic or cardboard, whether flat, corrugated or mixed.
- the present invention relates to the machine or the module which makes, from a blank or a cardboard cut already grooved, on the one hand the folding of two lateral flaps that fall back in the direction of a central assembly line, with a partial overlap of the outer edge of these flaps, and secondly the gluing of these two parts in the overlap zone for their subsequent maintenance in the folded position which has been imposed by the machine.
- Such a machine is called folder-gluer.
- a cardboard cutout 10 presents flat (see Fig. 1 ) a general shape of rectangle with two sides of greater length, forming the front edge 11 for the side that first enters the folder-gluer machine, and the rear edge 12 for the side that enters the last in the folder-folding machine. gluer.
- this front edge 11 and this rear edge 12 which are parallel to each other, are generally orthogonal to the longitudinal axis XX 'of the folder-gluer.
- the two lateral sides of smaller length define the right edge 13 and the left edge 14 which are parallel to each other and to the longitudinal axis XX 'of the folder-gluer.
- the right edge 13 is the lateral side which is located to the right of the longitudinal axis of the folder-gluer
- the left edge 14 is the lateral side which is located to the left of the longitudinal axis XX 'of the folder-gluer.
- the right and left edges 13, 14 have a cut along their two end portions so as to delimit a right leg 13a and a left leg 14a in the central portion of the right and left edges 13 and 14. In some cutouts, the right leg 13a is absent, the edge 13 then being completely straight.
- Two longitudinal lines represented in dotted lines correspond to the fold lines, materialized by the right longitudinal groove 15 and the left longitudinal groove 16, between which is defined the central flap 19.
- the right flap 17 is located between the right groove 15 and the edge right 13.
- the left pane 18 is located between the longitudinal longitudinal groove 16 and the left edge 14.
- the Figs. 2 and 3 represent the blank 10, after folding and folding of the two flaps 17 and 18 one on the other, and after bonding between the right leg 13a and the left leg 14a, in an ideal conformation.
- the right tab 14a is sticking directly on the flap 17 at the edge 13.
- the right side 15 'of the folded-glued cut 10' is obtained at the location of the right longitudinal groove
- the left side 16 'of the folded-glued cutout 10' is obtained at the location of the longitudinal longitudinal groove 16.
- the right edge 13 and the left edge 14 are spaced apart from each other, at the cutouts, a gap Greef, forming a reference gap, a predetermined value and constant along the cuts. So on the Fig. 2 , the same value Greef is found at the location of the front edge 11 and the location of the trailing edge 12.
- a first anomaly of positioning of the two lateral flaps, called gap corresponds to a too large spacing between the right and left edges 14 of the two flaps 17, 18 folded and glued: a representation of this first anomaly is visible on the Fig. 4 , with a gap G 'forming a larger gap than the greek.
- a second anomaly of positioning of the two lateral flaps 17, 18, called fishtailing corresponds to a defect of parallelism between the edges 13 and 14 of the two lateral flaps 17, 18 folded and glued, most of the time accompanied by the same lack of parallelism between the sides 15 'and 16'.
- a first configuration of this second anomaly is visible on the Fig. 5 in this case, the edges 13 and 14 converge towards the front edge 11 so that they define a smaller gap G1 (and possibly negative) between the front ends of the edges 13 and 14 that the gap G2 defined between the rear ends of the edges 13 and 14.
- an angle ⁇ 1 between the edges 13 and 14 is measured from the edge back 12.
- edges 13 and 14 are divergent in the direction of the front edge 11 and converge towards the rear edge 12, so that they define a gap G1 larger (and possibly negative) between the front ends of the edges 13 and 14 that the gap G2 defines between the rear ends of the edges 13 and 14.
- an angle a2 between the edges 13 and 14 is measured from the front edge 11.
- these two anomalies gap and fishtailing can meet simultaneously on the same cardboard cut.
- the document EP 1932658 describes a method and a folder-gluer machine which uses, at two successive alignment modules, an alignment rule whose orientation with respect to the longitudinal direction of the machine is modifiable, so as to allow, by means of angular offset, which is imposed on one and then the other sides of the folded cut, to make up at least a portion of the misalignment between the two right edges 13 and left 14.
- this solution rectifies in a systematic way that part of the misalignment that comes from the mechanical movements of the machine and not the shape or the reaction to folding and other processing specific to each cardboard cut.
- position sensors make it possible to detect these anomalies after treatment of the cut in order to identify and eject the packages concerned by anomalies exceeding a predetermined dimensional tolerance threshold. Also, in the machines of the prior art, the correction of the identified anomaly systematically goes through the modification of the setting of the moving parts of the machine, but does not take into account the deformation of the particular cut from its non-compliant position in the machine, improper folding, improper cutting (contour), or improper grooving.
- An object of the present invention is to provide a method and a device for processing a cut in a folder-gluer for performing the correction of the position of the right and left flaps when folded one on the other, free limitations of known machines. Another object is to provide a method and a device for correcting the folded position of the right flap and / or the left flap of a cut, taking into account the individual situation of each cut. Another purpose is to correct or not, on a case by case basis, the folded position of the right flap and / or the left flap of a cut, in order to obtain cutouts that are acceptable for most cases. Thus, a maximum of cuts can be preserved for the future treatment and discard only a small number of cuts. In this way, material savings are realized since only few cuts are thus ejected from the machine to be discarded.
- suction cups with partial vacuum, allows to grasp and rectify the position of the folded right door and / or the folded left door, and without damage.
- Such a method can be implemented while the position of the cut, in the longitudinal direction of the folder-gluer, is substantially the same throughout the correction procedure.
- the method is implemented while cutting advances in the longitudinal direction of the folder-gluer, either continuously or by jerks.
- the locking of the central flap during the step f1) is performed by its lower face by locking means operating with a depression vacuum vacuum of the lower face. In this way, maintaining the central flap that does not damage the cut is achieved and it is easy to activate or stop it quickly.
- Such a device makes it possible to fold the top of both the right flap and the left flap, over the central flap, folding the folded right flap and folded left flap which are found one above the other at least in the overlap portion, the installation of the glue, the control of the position of the right and left flaps, the possible realization of the correction of the position of the right flap, the left flap or both of the flap right and left pane, and maintaining the corrected position during the support between the right flap and the left flap in the covering portion until the glue.
- the order of operations mentioned above is not fixed, the glue can be installed before or after folding, before or after the position check, or before or after the possible correction.
- the present invention also relates to a folder-gluer machine equipped with a correction device as described in the present text.
- the Fig. 7 illustrates the principle of the method for correcting an excessively large gap, namely with G '- Glef> 0.
- a positional deviation is detected, namely the distance between the right edge and the left edge or gap, which is not in accordance with FIG. the admissible range, as for gap G 'of the Fig. 4 or from Fig. 7 .
- the following procedure is performed. After blocking the central flap 19, the gripping of the upper face of the folded right flap 17 is simultaneously performed by two suckers 21, 23 offset in the longitudinal direction and the gripping of the upper face of the left flap 18 folded by two suckers 24, 26 offset in the longitudinal direction.
- the four suction cups 21, 23, 24 and 26 are lowered to come into contact with the folded right flap face 17 facing upwards and with the face of the folded left flap 18 facing upwards.
- the four suckers 21, 23, 24 and 26 being vacuumed during the capture, a safe grip of the right pane 17 is obtained in two locations and the left pane 18 in two locations.
- the correction of the position of the left pane 18 and / or the right pane 16 is achieved by lateral displacement of the two suckers 21, 23 of the right pane 16 and / or the two suckers 24, 26 of the left pane 18, in order to change the distance between the right edge 13 and the left edge 14 to bring it back into the allowable range.
- the two straight suckers 21 and 23, including the right front suction cup 21 and the right rear suction cup 23, are moved together. So, on the Fig. 7 to bring the right edge 13 of the axis X-X ', the pair of straight suckers 21, 23 is moved to the left.
- the two left suction cups 24 and 26, comprising the left front suction cup 24 and the left rear suction cup 26, are moved together. So, on the Fig. 7 to bring the left edge 14 of the axis X-X ', the pair of left suction cups 24, 26 is moved to the left.
- the Figs. 8 and 9 respectively illustrate the principle of the correction method for rear fishtailing or front fishtailing.
- a positional deviation is detected in the form of a parallelism defect between the right edge 13 and the left edge 14, with a angle value ⁇ 1 or ⁇ 2 exceeding a maximum allowable value, it is in the presence of a result of folding not in accordance with the allowable range, and as for the Figs. 5, and 6 the following procedure is carried out.
- the four suction cups 21, 23, 24 and 26 are lowered in right and left pairs, until coming into contact with the folded right flap face 17 facing upwards and with the face of the folded left flap 18 turned to the top.
- the front suction cup 21 and 21 of each pair is placed under vacuum.
- the rear fishtailing is corrected by a lateral displacement of the front suction cups 21 and 24 towards the outer lateral sides of the bent cut, which are located on the same flap as the suction cup. So, as we see on the Fig. 8 , the right front suction cup 21 is moved towards the right side 15 ', namely to the right, and the left front suction cup 24 is moved towards the left side 16', namely to the left.
- the front fishtailing is corrected by a lateral displacement of the front suction cups 21 and 24 towards the outer lateral sides of the folded cutout 10 which are located on the flap different from that on which the suction cup is concerned. So, as we see on the Fig. 9 , the right front suction cup 21 is moved towards the left side 16 ', ie to the left, and the left front suction cup 24 is moved towards the right side 15', namely to the right.
- the angular position of the left flap 18 and / or the right flap 16 is corrected using, for the right pane 16 and for the left pane 18, a single sucker that is vacuumed to perform the seizure of the corresponding flap, and which remains under vacuum during its lateral movement, thereby changing the orientation of the right pane 17 and / or the left pane 18 to bring the right edge 13 and the left edge 14 substantially parallel to each other.
- This maneuver for modifying the angular position of the right flap 17 or the left flap 18 or both of the right flap 17 and the left flap 18 also functions by partial evacuation and lateral displacement of one or the other.
- the invention also makes it possible to act and rectify the two anomalies.
- the correction of the gap is effected by lateral displacement of the two suckers of each pair, right and left, the four suckers 21, 23, 24 and 26 being in engagement with the right and left flaps 17, according to the previous explanations of the Fig. 7 .
- the correction means comprise a pair of straight suction cups 21, 23 and a pair of left suction cups 24, 26 (see FIG. Figs. 10 to 13 for the upper part of the correction device).
- a first suction cup 21 (24) is located at the front and a second suction pad 23 (26) is located at the rear. Moreover, the vacuuming of the first suction cup 21 (24) is controlled independently of the evacuation of the second suction cup 23 (26).
- the two suction cups 21, 23 of the pair of straight suction cups are mounted on a straight support 31 for simultaneously moving the two suction cups 21, 23 and the two suction cups 24, 26 of the pair of suction cups. on the left support 32 for simultaneously moving the two suction cups 24, 26.
- the simultaneous displacement of the two suction cups of each pair is carried out in a transverse direction (orthogonally to the direction of advancement A) and height.
- the right support 31 (left 32) is mounted by a right bracket 33 ( left 34) to the rod 35 (36) of a straight linear motor 37 (left 38).
- a first position corresponds to the rest position, pending the arrival of a new cut.
- a second position corresponds to the end position when the blank has been folded, glued and possibly corrected.
- the compression module 40 supplies partial vacuum air to the right suction cups 21, 23 via a straight pipe 41 and feeds the left suction cups 24, 26 with partial vacuum through a left pipe 42 (FIG. Figs. 10 and 11 ).
- optical detection means To control the position of the right edge 13 and the left 14 after the folding of the right flap 17 and the left flap 18, it is preferably used optical detection means, not shown. For example, optical detection as described in the document is used. EP 0937573 .
- These detection means measure the difference between the right edge 13 and the left edge 14 after the folding of the right flap 17 and the left flap 18 at several locations along the longitudinal direction. In this way, by comparison means, the comparison of each of these measured values with the reference gap, of predetermined value Ge, is carried out and it is determined whether a correction is necessary. In this case, it is calculated which retrofit must be made to return the cut to the acceptable range of deviation.
- the right support 31 and the left support 32 have a longitudinal stroke (along the axis XX 'of the folder-gluer) of 200 mm thanks to the linear motors 37 and 38.
- This longitudinal stroke makes it possible to follow the cutting 10 during a part of its advance while performing the correction during the advancing along the advancement direction A.
- the right support 31 and the left support 32 has a transverse travel (according to the direction orthogonal to the XX 'axis of the folder-gluer) between 10mm and 30mm. This transverse stroke is sufficient to make up for the anomalies encountered in most cases for a cut of maximum size, for example 1100mm by 1700mm.
- Pressure means for making a pressure contact between the right flap 17 and the left flap 18 in the covering portion.
- the lower part of the correction device completes the elements allowing the advance of the cut in the longitudinal direction by locking means of the central flap 19 (see Figs. 11A , 11B , 13 , 14 , 15 , 16A , 16B , 17A and 17B ).
- the elements allowing the advance of the blank 10 are endless belts 60, visible in number of three on the Figs. 16A , 16B , 17A and 17B and arranged parallel to each other under the suction cups 21, 23, 24 and 26.
- These locking means are intended to retain the cutout 10 by its central flap 19 by preventing it from lifting, or to move laterally in particular. Without this restraint of cutting by its central flap 19, the correction of the position of the right pane 17 and / or the left pane 18 could not be effected with efficiency and precision.
- an embodiment of these blocking means 70 of the central flap 19 uses, as a gripping means of the central flap 19, a depression vacuum vacuum of the underside of the central flap 19.
- the blocking means 70 comprise at least one ramp 71 equipped with nozzles 72 oriented upwards and able to perform a vacuum.
- the outlet of these nozzles 72 opens on a support plate 75 on which the cutout 10 rests while being able to be driven by the belts 60.
- two ramps 71 are each arranged along the one and the Other external belts 60.
- the nozzles 72 act as suction cups by sucking down the underside of the central flap 19 when they are supplied with air under partial vacuum.
- a pressurization module 73 supplies partial ramp air 71 to the ramps 71 via the pipes 74.
- the ramp 71 is mounted ( Figs. 13 to 17 ) on a linear motor 80 accompanying the cut 10 during its travel along the longitudinal direction of the folder-gluer machine.
- the vacuum of the ramps 71 is activated, whereby each nozzle 72 realizes a grip a surface of the lower face of the central flap 19, thus making it possible to perform the correction of the right flap 17 and / or the left flap 18.
- the linear motor 80 is placed along the transport means that advance the cut along the longitudinal direction of the folder-gluer.
- these transport means are endless belts 60.
- three endless belts 60 are arranged over the width of the module of the folder-gluer, and along and outside the two outer belts, is mounted a ramp 71
- between each pair of belts 60 is mounted a ramp 71. In this way, the cuts 10 are driven by the belts 60 and are pressed downwards when the evacuation of the ramps 71 is activated.
- the linear motors 80 accompany the longitudinal stroke of the blank 10 in all cases, whether there is correction or not. Also, the linear motors 80 are retracted and returned to the initial position rapidly after the departure of the blank 10 from the correction device and before the arrival of the next blank 10 in the correction device.
- the correction means ie the suction cups 21, 23, 24, 26, and the blocking means, ie the ramps 71
- the correction means are able to advance in the longitudinal direction (X-X ') of the folder-gluer machine to the same speed as the cut 10 during its longitudinal stroke.
- a synchronization between the motor which controls the longitudinal travel of the right support 31 and the left support 32 and the motor which controls the linear motors 80 supporting the suction nozzles 71 is carried out.
- the bonding is carried out before the folding of the right flap 17 and the left flap 18.
- it is essential to avoid taking the glue in the overlap portion between the right flap 17 and the left flap 18 before and during the control of the position (ie during steps d), e)), and during the eventual position correction (step f)).
- it prevents the contact between the right flap and the left flap by an element 90 inserted between the right flap 17 and the left flap 18, and before step g) the element 90 is removed and a pressure contact is made between the adhesive, the right flap 17 and the left flap 18 in the covering portion, preferably until the glue.
- the correction device preferably further comprises an element 90 adapted to be inserted between the right flap and the left flap before folding, and able to be removed after the correction.
- this element 90 can be in the form of a rod fixed by its rear end from the top and allowing the passage of the cut just below the element 90. This is of an embodiment where the folding and the correction of the cut are carried out during the advance of the cutout 10.
- the more advanced position of the cutout 10 allows a release of the rod which is then output from the cut, whereby the contact between the right flap 17, the left flap 18 and the central flap 19 is provided to allow the taking of the glue.
- this element 90 can be removed.
- the correction of the position of the right flap 18 and the left flap 17 relative to the central flap 19, is done in a sufficiently short time to allow this correction before taking the glue.
- a folder-gluer may also be a folding-gluing unit, mounted for example in an in-line machine, downstream of a flexo printing, and a rotary cut.
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Description
La présente invention concerne le domaine de la fabrication d'emballages, et notamment d'emballages fabriqués à partir de feuilles ou de bandes prédécoupées, notamment des découpes de papier, de plastique ou de carton, qu'il soit plat, ondulé ou mixte.The present invention relates to the field of the manufacture of packaging, including packaging made from sheets or strips precut, including paper cuts, plastic or cardboard, whether flat, corrugated or mixed.
En particulier, la présente invention se rapporte à la machine ou au module qui réalise, à partir d'un flan ou d'une découpe de carton déjà rainurée, d'une part le pliage de deux volets latéraux venant se rabattre en direction d'une ligne de montage centrale, avec un chevauchement partiel du bord extérieur de ces volets, et d'autre part le collage de ces deux volets dans la zone de chevauchement pour leur maintien ultérieur dans la position repliée qui leur a été imposée par la machine. Une telle machine est dénommée plieuse-colleuse.In particular, the present invention relates to the machine or the module which makes, from a blank or a cardboard cut already grooved, on the one hand the folding of two lateral flaps that fall back in the direction of a central assembly line, with a partial overlap of the outer edge of these flaps, and secondly the gluing of these two parts in the overlap zone for their subsequent maintenance in the folded position which has been imposed by the machine. Such a machine is called folder-gluer.
De nombreuses machines de l'art antérieur réalisent ces opérations combinées de pliage-collage, le long d'un parcours qui suit l'axe longitudinal de la plieuse-colleuse. Au cours de ces opérations de traitement de chaque découpe de carton, des écarts de position des deux volets sont régulièrement rencontrés une fois qu'ils sont pliés et collés, par rapport à leur position souhaitée, que ce soit du fait d'une déviation des éléments mobiles de la machine, et/ou du fait d'un positionnement décalé de tout ou partie de la découpe par rapport à la machine pendant son traitement et/ou du fait d'une découpe qui présente des caractéristiques géométriques légèrement différentes par rapport au modèle idéal de découpe de carton.Many machines of the prior art perform these combined folding-gluing operations, along a path that follows the longitudinal axis of the folder-gluer. During these processing operations of each carton blank, positional deviations of the two flaps are regularly encountered once they are folded and glued, relative to their desired position, whether due to a deviation of movable elements of the machine, and / or due to an offset positioning of all or part of the cut relative to the machine during its processing and / or because of a cut that has slightly different geometric characteristics compared to the ideal model of cardboard cutting.
Une découpe de carton 10 présente à plat (voir
Deux lignes longitudinales représentées en traits pointillés correspondent aux lignes de pliage, matérialisées par la rainure longitudinale droite 15 et la rainure longitudinale gauche 16, entre lesquelles est délimité le volet central 19. Le volet droit 17 est situé entre la rainure droite 15 et le bord droit 13. Le volet gauche 18 est situé entre la rainure longitudinale gauche 16 et le bord gauche 14.Two longitudinal lines represented in dotted lines correspond to the fold lines, materialized by the right
Les
Deux anomalies de positionnement principales des deux volets latéraux 17 et 18 peuvent notamment être distinguées. Une première anomalie de positionnement des deux volets latéraux, dénommée gap, correspond à un écartement trop grand entre les bords droit 13 et gauche 14 des deux volets 17, 18 pliés et collés: une représentation de cette première anomalie est visible sur la
Une deuxième anomalie de positionnement des deux volets latéraux 17, 18, dénommée fishtailing, correspond à un défaut de parallélisme entre les bords 13 et 14 des deux volets latéraux 17, 18 pliés et collés, la plupart du temps accompagné du même défaut de parallélisme entre les côtés 15' et 16'. Une première configuration de cette deuxième anomalie est visible sur la
Le document
Dans les machines de l'art antérieur, des capteurs de position permettent de détecter ces anomalies après traitement de la découpe en vue d'identifier et d'éjecter les emballages concernés par des anomalies dépassant un seuil de tolérance dimensionnel préétabli. Egalement, dans les machines de l'art antérieur, la correction de l'anomalie identifiée passe systématiquement par la modification du réglage des pièces mobiles de la machine, mais ne tient pas compte de la déformation de la découpe particulière provenant de sa position non conforme dans la machine, d'un pliage non conforme, d'un découpage (contour) non conforme, ou encore d'un rainurage non conforme.In the machines of the prior art, position sensors make it possible to detect these anomalies after treatment of the cut in order to identify and eject the packages concerned by anomalies exceeding a predetermined dimensional tolerance threshold. Also, in the machines of the prior art, the correction of the identified anomaly systematically goes through the modification of the setting of the moving parts of the machine, but does not take into account the deformation of the particular cut from its non-compliant position in the machine, improper folding, improper cutting (contour), or improper grooving.
Un but de la présente invention est de proposer un procédé et un dispositif de traitement d'une découpe dans une plieuse-colleuse permettant de réaliser la correction de la position des volets droit et gauche une fois repliés l'un sur l'autre, exempt des limitations des machines connues. Un autre but est de fournir un procédé et un dispositif permettant la correction de la position repliée du volet droit et/ou du volet gauche d'une découpe, prenant en compte la situation individuelle de chaque découpe. Un autre but est de permettre de corriger ou non, au cas par cas, la position repliée du volet droit et/ou du volet gauche d'une découpe, afin de pouvoir obtenir des découpes admissibles pour la plupart des cas. Ainsi, un maximum de découpes peut être conservé pour la suite du traitement et ne mettre au rebut qu'un nombre réduit de découpe. De cette façon, des économies de matière sont réalisées puisque seulement peu de découpes sont ainsi éjectées de la machine pour être mises au rebut.An object of the present invention is to provide a method and a device for processing a cut in a folder-gluer for performing the correction of the position of the right and left flaps when folded one on the other, free limitations of known machines. Another object is to provide a method and a device for correcting the folded position of the right flap and / or the left flap of a cut, taking into account the individual situation of each cut. Another purpose is to correct or not, on a case by case basis, the folded position of the right flap and / or the left flap of a cut, in order to obtain cutouts that are acceptable for most cases. Thus, a maximum of cuts can be preserved for the future treatment and discard only a small number of cuts. In this way, material savings are realized since only few cuts are thus ejected from the machine to be discarded.
Selon l'invention, ces buts sont atteints notamment au moyen d'un procédé de traitement d'une découpe destinée à former, après pliage-collage, une boîte aplatie pliée, comprenant les étapes suivantes:
- a) fourniture d'une découpe sensiblement plane comprenant un bord droit, un bord gauche, un bord avant, un bord arrière, une rainure longitudinale droite et une rainure longitudinale gauche, la rainure longitudinale droite et la rainure longitudinale gauche délimitant, avec le bord droit et le bord gauche au moins trois volets parmi lesquels un volet droit, un volet gauche et un volet central,
- b) application de colle dans une zone du volet droit adjacente au bord droit et/ou dans une zone du volet gauche adjacente au bord gauche, de sorte que de la colle soit présente dans une portion de recouvrement entre le volet droit et le volet gauche,
- c) pliage à 180° du volet droit autour de la rainure longitudinale droite en direction du volet central, et pliage à 180° du volet gauche autour de la rainure longitudinale gauche en direction du volet central,
- d) fermeture du volet droit replié et du volet gauche replié qui se retrouvent l'un au-dessus de l'autre au moins dans la portion de recouvrement,
- e) contrôle de la position repliée du bord droit et du bord gauche et comparaison de cette position effective avec une position prédéterminée de façon à déterminer un écart de position,
- f) lorsque l'écart de position dépasse une valeur d'écart admissible, réalisation des sous-étapes suivantes avant la prise de la colle:
- f1) blocage du volet central puis
- f2) saisie de la face supérieure du volet droit replié et du volet gauche replié par respectivement au moins une ventouse avec vacuum, et
- f3) correction de la position du volet gauche et/ou du volet droit par déplacement de la ventouse avec vacuum,
- g) mise en pression entre le volet droit et le volet gauche dans la portion de recouvrement jusqu'à la prise de la colle, et
- h) relâchement du volet central, du volet droit et du volet gauche.
- a) providing a substantially planar cutout comprising a straight edge, a left edge, a leading edge, a trailing edge, a right longitudinal groove and a left longitudinal groove, the right longitudinal groove and the left longitudinal groove delimiting, with the edge right and the left edge at least three components including a right pane, a left pane and a central pane,
- b) application of glue in an area of the right flap adjacent to the right edge and / or in a zone of the left flap adjacent to the left edge, so that glue is present in a covering portion between the right flap and the left flap ,
- c) 180 ° folding of the right flap around the right longitudinal groove in the direction of the central flap, and folding 180 ° of the left flap around the left longitudinal groove in the direction of the central flap,
- d) closing the folded right flap and the folded left flap which are found one above the other at least in the covering portion,
- e) controlling the folded position of the right edge and the left edge and comparing this effective position with a predetermined position so as to determine a positional deviation,
- f) when the position deviation exceeds a permissible deviation value, performing the following substeps before taking the glue:
- f1) locking the central flap then
- f2) grasping the upper face of the folded right flap and the left flap folded by respectively at least one sucker with vacuum, and
- f3) correction of the position of the left pane and / or the right pane by moving the vacuum pad with vacuum,
- g) pressurizing between the right flap and the left flap in the covering portion until the adhesive is set, and
- h) release of the central flap, the right flap and the left flap.
L'utilisation de ventouses avec mise sous vide partiel, permet de saisir puis de rectifier la position du volet droit replié et/ou du volet gauche replié, et ce sans endommagement.The use of suction cups with partial vacuum, allows to grasp and rectify the position of the folded right door and / or the folded left door, and without damage.
Cette solution présente notamment l'avantage par rapport à l'art antérieur de réaliser la correction de la position des volets repliés, seulement si le contrôle de position révèle que c'est nécessaire et au surplus avec une correction adaptée à la situation géométrique particulière de chaque découpe considérée.This solution has the advantage over the prior art of achieving the correction of the position of the folded flaps, only if the position control reveals that it is necessary and moreover with a correction adapted to the particular geometric situation of each cut considered.
Un tel procédé peut être mis en oeuvre alors que la position de la découpe, dans la direction longitudinale de la plieuse-colleuse, est sensiblement la même pendant toute la procédure de correction. Selon un autre mode de réalisation, le procédé est mis en oeuvre pendant que la découpe avance dans la direction longitudinale de la plieuse-colleuse, soit en continu, soit par à-coups.Such a method can be implemented while the position of the cut, in the longitudinal direction of the folder-gluer, is substantially the same throughout the correction procedure. According to another embodiment, the method is implemented while cutting advances in the longitudinal direction of the folder-gluer, either continuously or by jerks.
Selon un mode de réalisation, le blocage du volet central lors de l'étape f1) est réalisé par sa face inférieure par des moyens de blocage fonctionnant avec une mise en dépression par vacuum de la face inférieure. De cette façon, un maintien du volet central qui n'endommage pas la découpe est réalisé et il est facile de l'activer ou de le stopper de façon rapide.According to one embodiment, the locking of the central flap during the step f1) is performed by its lower face by locking means operating with a depression vacuum vacuum of the lower face. In this way, maintaining the central flap that does not damage the cut is achieved and it is easy to activate or stop it quickly.
Selon l'invention, ces buts sont également atteints notamment au moyen d'un dispositif de correction de la position d'une découpe dans une plieuse-colleuse, pour une découpe sensiblement plane comprenant un bord droit, un bord gauche, un bord avant, un bord arrière, une rainure longitudinale droite et une rainure longitudinale gauche, la rainure longitudinale droite et la rainure longitudinale gauche délimitant, avec le bord droit et le bord gauche au moins trois volets parmi lesquels un volet droit, un volet gauche et un volet central, le dispositif comprenant:
- des moyens de pliage du volet droit et du volet gauche,
- des moyens de contrôle de la position relative entre le bord droit et le bord gauche en direction transversale après pliage du volet droit et du volet gauche,
- des moyens de blocage du volet central,
- des moyens de collage aptes à appliquer de la colle dans une zone du volet droit adjacente au bord droit et/ou dans une zone du volet gauche adjacente au bord gauche, de sorte que de la colle soit présente dans une portion de recouvrement entre le volet droit et le volet gauche,
- des moyens de correction comprenant au moins une ventouse destinée à la saisie du volet droit et au moins une ventouse destinée à la saisie du volet gauche, les ventouses étant orientées vers le bas, mobiles verticalement et en direction transversale et aptes à être soumises à du vacuum, et
- des moyens de pression permettant de réaliser un contact sous pression entre le volet droit et le volet gauche dans la portion de recouvrement.
- means for folding the right flap and the left flap,
- means for controlling the relative position between the right edge and the left edge in transverse direction after folding the right flap and the left flap,
- locking means of the central flap,
- adhesive means capable of applying glue in an area of the right flap adjacent to the right edge and / or in an area of the left flap adjacent to the left edge, so that glue is present in a covering portion between the flap right and the left pane,
- correction means comprising at least one suction cup for gripping the right flap and at least one suction cup for gripping the left flap, the suction cups being oriented downwards, movable vertically and in the transverse direction and capable of being subjected to stress. vacuum, and
- pressure means for making a pressure contact between the right flap and the left flap in the covering portion.
Un tel dispositif permet de faire le pliage par le haut à la fois du volet droit et du volet gauche, par-dessus le volet central, le rabattage du volet droit replié et du volet gauche replié qui se retrouvent l'un au-dessus de l'autre au moins dans la portion de recouvrement, la pose de la colle, le contrôle de la position des volets droit et gauche, la réalisation éventuelle de la correction de la position du volet droit, du volet gauche ou à la fois du volet droit et du volet gauche, et le maintien de la position corrigée pendant l'appui entre le volet droit et le volet gauche dans la portion de recouvrement jusqu'à la prise de la colle. L'ordre des opérations mentionnées ci-dessus n'est pas figé, la pose de la colle pouvant intervenir avant ou après le pliage, avant ou après le contrôle de position, ou encore avant ou après la correction éventuelle.Such a device makes it possible to fold the top of both the right flap and the left flap, over the central flap, folding the folded right flap and folded left flap which are found one above the other at least in the overlap portion, the installation of the glue, the control of the position of the right and left flaps, the possible realization of the correction of the position of the right flap, the left flap or both of the flap right and left pane, and maintaining the corrected position during the support between the right flap and the left flap in the covering portion until the glue. The order of operations mentioned above is not fixed, the glue can be installed before or after folding, before or after the position check, or before or after the possible correction.
La présente invention se rapporte également à une machine plieuse-colleuse équipée d'un dispositif de correction telle que décrit dans le présent texte.The present invention also relates to a folder-gluer machine equipped with a correction device as described in the present text.
Des exemples de mise en oeuvre de l'invention sont indiqués dans la description illustrée par les figures annexées dans lesquelles:
- la
Figure 1 représente la projection d'une découpe de carton; - les
Figures 2 et 3 représentent cette découpe de carton, après pliage des volets latéraux, respectivement en vue de dessus et en vue depuis l'avant, selon la direction III de laFigure 2 ; - les
Figures 4, 5 et 6 sont similaires à laFigure 2 et représentent des configurations avec différentes anomalies de pliage; - les
Figures 7, 8 et 9 représentent le procédé de correction selon le procédé de l'invention, respectivement pour les anomalies de pliage desFigures 4, 5 et 6 ; - les
Figures 10A et10B représentent, respectivement pour une première position et pour une deuxième position, une vue depuis le dessous d'un mode de réalisation du dispositif de correction selon la présente invention; - les
Figures 11A et11B représentent, respectivement pour la première position et pour la deuxième position, une vue latérale partielle du mode de réalisation du dispositif de correction selon la présente invention, respectivement selon la direction XIA de laFigure 10A et selon la direction XB de laFigure 10B ; - la
Figure 12 représente une vue selon la direction XII de laFigure 11 , montrant depuis le dessous la partie supérieure du dispositif de correction de laFigure 10 ; - la
Figure 13 représente une vue latérale partielle du mode de réalisation du dispositif de correction selon la présente invention; - la
Figure 14 représente une vue selon la direction XIV de laFigure 13 , montrant depuis le dessus une portion de la partie inférieure du dispositif de correction de laFigure 13 ; - la
Figure 15 représente une vue en coupe selon la direction XV-XV de laFigure 14 ; - les
Figures 16A et16B représentent, respectivement pour la première position et pour la deuxième position, une vue de dessus selon la direction XVI de laFigure 13 , montrant depuis le dessus une autre portion de la partie inférieure du dispositif de correction de laFigure 13 ; et - les
Figures 17A et17B représentent, respectivement pour la première position et pour la deuxième position, une vue latérale selon la direction XVII de laFigure 13 , montrant depuis le côté la partie inférieure du dispositif de correction de laFigure 13 .
- the
Figure 1 represents the projection of a cardboard cutout; - the
Figures 2 and 3 represent this cardboard cut, after folding of the lateral flaps, respectively in plan view and in view from the front, according to the direction III of theFigure 2 ; - the
Figures 4, 5 and 6 are similar to theFigure 2 and represent configurations with different folding anomalies; - the
Figures 7, 8 and 9 represent the correction method according to the method of the invention, respectively for the bending anomalies of theFigures 4, 5 and 6 ; - the
Figures 10A and10B represent, respectively for a first position and for a second position, a view from below of an embodiment of the correction device according to the present invention; - the
Figures 11A and11B represent, respectively for the first position and for the second position, a partial lateral view of the embodiment of the correction device according to the present invention, respectively in the direction XIA of theFigure 10A and according to the direction XB of theFigure 10B ; - the
Figure 12 represents a view according to the direction XII of theFigure 11 , showing from below the upper part of the correction device of theFigure 10 ; - the
Figure 13 represents a partial side view of the embodiment of the correction device according to the present invention; - the
Figure 14 represents a view according to the direction XIV of theFigure 13 , showing from above a portion of the lower portion of the correction device of theFigure 13 ; - the
Figure 15 represents a sectional view along the direction XV-XV of theFigure 14 ; - the
Figures 16A and16B represent, respectively for the first position and for the second position, a view from above according to the direction XVI of theFigure 13 , showing from above a further portion of the lower portion of the correction device of theFigure 13 ; and - the
Figures 17A and17B represent, respectively for the first position and for the second position, a lateral view in the direction XVII of theFigure 13 , showing from the side the lower part of the correction device of theFigure 13 .
La
A cet effet, les quatre ventouses 21, 23, 24 et 26 sont abaissées jusqu'à venir en contact avec la face du volet droit replié 17 tournée vers le haut et avec la face du volet gauche replié 18 tournée vers le haut. Les quatre ventouses 21, 23, 24 et 26 étant mises sous vacuum lors de la saisie, une prise sûre du volet droit 17 est obtenue en deux emplacements et du volet gauche 18 en deux emplacements. Ensuite, en fonction de la valeur de l'écart de position latérale (G' - Gréf) entre le bord droit 13 et le bord gauche 14, et l'éventuel besoin de recentrer ce gap sur une ligne longitudinale médiane de la découpe (superposée avec l'axe X-X'), identifiés par un contrôle de la position des bords droit 13 et gauche 14, le volet droit 17 ou le volet gauche 18 ou à la fois le volet droit 17 et le volet gauche 18 va être déplacé latéralement par déplacement d'une partie ou de toutes les ventouses 21, 23, 24 et 26.For this purpose, the four
Pour cela, la correction de la position du volet gauche 18 et/ou du volet droit 16 est réalisée par déplacement latéral des deux ventouses 21, 23 du volet droit 16 et/ou des deux ventouses 24, 26 du volet gauche 18, afin de modifier la distance entre le bord droit 13 et le bord gauche 14 jusqu'à la ramener dans la plage admissible.For this, the correction of the position of the
Dans un mode de réalisation préférentiel, les deux ventouses droites 21 et 23, comprenant la ventouse avant droite 21 et la ventouse arrière droite 23, sont déplacées conjointement. Ainsi, sur la
Les
Après blocage du volet central 19, on effectue simultanément:
- la saisie de la face supérieure du volet droit 17 replié par une seule ventouse droite avant 21, ou arrière 23 (la ventouse avant droite 21 sur les
Figs. 8 et 9 sur lesquels la ventouse arrière droite 23 est représentée en traits pointillés car elle n'est pas mise sous vide de sorte qu'elle ne saisit pas l'arrière du volet droit 17), et - la saisie de la face supérieure du volet gauche 18 replié par une seule ventouse gauche avant 24, ou arrière 28 (la ventouse avant gauche 24 sur les
Figs. 8 et 9 sur lesquels la ventouse arrière gauche 26 est représentée en traits pointillés car elle n'est pas mise sous vide de sorte qu'elle ne saisit pas l'arrière du volet droit 17).
- the capture of the upper face of the
right flap 17 folded by a singleright suction pad 21, or rear 23 (the rightfront suction cup 21 on theFigs. 8 and 9 on which the rightrear suction cup 23 is shown in dotted lines because it is not evacuated so that it does not grip the rear of the right flap 17), and - the capture of the upper face of the
left flap 18 folded by a singleleft suction cup 24, or rear 28 (the leftfront suction cup 24 on theFigs. 8 and 9 on which the leftrear sucker 26 is shown in dotted lines because it is not evacuated so that it does not grip the back of the right pane 17).
A cet effet, les quatre ventouses 21, 23, 24 et 26 sont abaissées par paires droite et gauche, jusqu'à venir en contact avec la face du volet droit replié 17 tournée vers le haut et avec la face du volet gauche replié 18 tournée vers le haut. Dans le cas illustré, seule la ventouse avant 21 et 21 de chaque paire est mise sous vacuum. Ainsi lors de la saisie, on obtient une prise sûre du volet droit 17 en un seul emplacement (ici à l'avant) et du volet gauche 18 en un seul emplacement (ici à l'avant). Ensuite, en fonction de la valeur de l'écart de position latérale entre le bord droit 13 et le bord gauche 14 (identifié ici par G1 - Gréf à l'avant et G2-GRéf à l'arrière, avec éventuellement prise en compte de l'angle α1 ou α2 mesuré entre le bord droit 13 et le bord gauche 14), et l'éventuel besoin de recentrer ce gap sur une ligne longitudinale médiane de la découpe (superposée avec l'axe X-X'), identifiés par un contrôle de la position des bords droit 13 et gauche 14, on va déplacer angulairement le volet droit 17 ou le volet gauche 18 ou à la fois le volet droit 17 et le volet gauche 18 par déplacement latéral d'une ou des deux ventouses avant 21 et/ou 24. Alternativement, dans une procédure de correction non représentée, ce déplacement angulaire est obtenu par déplacement latéral d'une ou des deux ventouses arrière 23 et/ou 26.For this purpose, the four
Ainsi, dans le cas de la
Dans le cas de la
Ainsi, on comprend que lorsque l'écart de position détecté est un défaut de parallélisme entre le bord droit 13 et le bord gauche 14, on réalise la correction de la position angulaire du volet gauche 18 et/ou du volet droit 16 en utilisant, pour le volet droit 16 et pour le volet gauche 18, une seule ventouse qui est mise sous vacuum pour effectuer la saisie du volet correspondant, et qui reste sous vacuum lors de son déplacement latéral, ce par quoi on modifie l'orientation du volet droit 17 et/ou du volet gauche 18 pour ramener le bord droit 13 et le bord gauche 14 sensiblement parallèles entre eux.Thus, it is understood that when the detected positional deviation is a parallelism defect between the
Cette manoeuvre de modification de la position angulaire du volet droit 17 ou du volet gauche 18 ou à la fois du volet droit 17 et du volet gauche 18, fonctionne également par la mise sous vide partielle et le déplacement latéral de l'une ou l'autre parmi la ventouse avant 21 (24) et la ventouse arrière 23 (26): cette saisie en un point unique du volet concerné, permet de modifier l'angle formé entre le bord de ce volet et l'axe X-X' pour autant que ce point de prise du volet par la ventouse ne soit pas placé au milieu de la longueur (étendue selon l'axe X-X' de la plieuse-colleuse).This maneuver for modifying the angular position of the
Dans le cas, non représenté, où la découpe pliée 10 souffre à la fois d'un gap non admissible et d'un défaut de parallélisme non admissible, l'invention permet également d'agir et de rectifier les deux anomalies. En pratique, on réalise d'abord la correction du gap par déplacement latéral des deux ventouses de chaque paire, droite et gauche, les quatre ventouses 21, 23, 24 et 26 étant en prise avec les volets droit 17 et gauche 18, selon les explications précédentes de la
Les moyens de correction comprennent une paire de ventouses droites 21, 23 et une paire de ventouses gauches 24, 26 (voir
Egalement, pour chaque paire de ventouses, une première ventouse 21 (24) est située à l'avant et une deuxième ventouse 23 (26) est située à l'arrière. Par ailleurs, la mise sous vide de la première ventouse 21 (24) est contrôlée indépendamment de la mise sous vide de la deuxième ventouse 23 (26).Also, for each pair of suction cups, a first suction cup 21 (24) is located at the front and a second suction pad 23 (26) is located at the rear. Moreover, the vacuuming of the first suction cup 21 (24) is controlled independently of the evacuation of the second suction cup 23 (26).
Pour une facilité de montage et de commande, les deux ventouses 21, 23 de la paire de ventouses droites sont montées sur un support droit 31 permettant de déplacer simultanément les deux ventouses 21, 23 et les deux ventouses 24, 26 de la paire de ventouses gauches sont montées sur un support gauche 32 permettant de déplacer simultanément les deux ventouses 24, 26. En particulier, afin d'assurer la correction comme décrit précédemment, le déplacement simultané des deux ventouses de chaque paire est effectué en direction transversale (de façon orthogonale à la direction d'avancement A) et en hauteur.For ease of assembly and control, the two
Par ailleurs, comme on peut le voir sur les
Le module de compression 40 alimente en air sous vide partiel les ventouses droite 21, 23 par un tuyau droit 41 et alimente en air sous vide partiel les ventouses gauche 24, 26 par un tuyau gauche 42 (
Pour effectuer le contrôle de la position du bord droit 13 et du gauche 14 après le pliage du volet droit 17 et du volet gauche 18, on utilise de préférence des moyens de détection optique, non représenté. Par exemple, on utilise une détection optique telle que décrite dans le document
Ces moyens de détection mesurent l'écart entre le bord droit 13 et le bord gauche 14 après le pliage du volet droit 17 et du volet gauche 18, à plusieurs emplacements le long de la direction longitudinale. De cette façon, on réalise par des moyens de calcul la comparaison de chacune de ces valeurs mesurées avec le gap de référence, de valeur Gréf prédéterminée, et on détermine si une correction est nécessaire. Dans ce cas, on calcule quel rattrapage doit être effectué pour remettre la découpe dans la plage d'écart admissible.These detection means measure the difference between the
Plusieurs cas sont possibles tels qu'un rattrapage en agissant sur le seul volet gauche 18, sur le seul volet droit 17, à la fois sur le volet gauche 18 et sur le volet droit 17, et, pour le ou les volets, par les deux ventouses de la paire (droite ou gauche) concernée (gap seul), par une seule ventouse de la paire (droite ou gauche) concernée (fishtailing seul), par les deux ventouses et ensuite par une seule ventouse de la paire (droite ou gauche) concernée (gap et fishtailing).Several cases are possible such as a catch-up by acting on the only
A titre d'exemple, le support droit 31 et le support gauche 32 présente une course longitudinale (selon l'axe X-X' de la plieuse-colleuse) de 200mm grâce aux moteurs linéaires 37 et 38. Cette course longitudinale permet de suivre la découpe 10 pendant une partie de son avancée tout en effectuant la correction pendant l'avancée le long de la direction d'avancement A. Egalement à titre d'exemple, le support droit 31 et le support gauche 32 présente une course transversale (selon la direction orthogonale à l'axe X-X' de la plieuse-colleuse) entre 10mm et 30mm. Cette course transversale est suffisante pour rattraper les anomalies rencontrées dans la plupart des cas s'agissant d'une découpe de taille maximale, par exemple 1100mm par 1700mm. Des moyens de pression permettant de réaliser un contact sous pression entre le volet droit 17 et le volet gauche 18 dans la portion de recouvrement.By way of example, the
La partie inférieure du dispositif de correction complète les éléments permettant l'avance de la découpe selon la direction longitudinale par des moyens de blocage du volet central 19 (voir
Comme on peut le voir sur les
La rampe 71 est montée (
Pour une facilité et une rapidité de déclenchement, le moteur linéaire 80 est placé le long des moyens de transport qui font avancer la découpe le long de la direction longitudinale de la plieuse-colleuse. Sur le mode de réalisation illustré, comme il apparaît sur les
Les moteurs linéaires 80 accompagnent la course longitudinale de la découpe 10 dans tous les cas, qu'il y ait correction ou non. Egalement, les moteurs linéaires 80 sont rétractés et remis en position initiale rapidement après le départ de la découpe 10 hors du dispositif de correction et ce avant l'arrivée de la découpe 10 suivante dans le dispositif de correction.The
Avantageusement, les moyens de correction, i.e. les ventouses 21, 23, 24, 26, et les moyens de blocage, i.e. les rampes 71, sont aptes à avancer selon la direction longitudinale (X-X') de la machine plieuse-colleuse à la même vitesse que la découpe 10 pendant sa course longitudinale. En pratique, une synchronisation entre le moteur qui commande la course longitudinale du support droit 31 et du support gauche 32 et le moteur qui commande les moteurs linéaires 80 supportant les buses d'aspiration 71 est réalisée.Advantageously, the correction means, ie the
De façon préférentielle, le collage est réalisé avant le repliage du volet droit 17 et du volet gauche 18. Il faut cependant éviter impérativement la prise de la colle dans la portion de recouvrement entre le volet droit 17 et le volet gauche 18 avant et pendant le contrôle de la position (à savoir pendant les étapes d), e)), et pendant l'éventuelle correction de position (étape f)). A cet effet, selon une disposition avantageuse, illustrée partiellement sur la
Dans la machine, le dispositif de correction comprend de préférence en outre un élément 90 apte à être inséré entre le volet droit et le volet gauche avant leur pliage, et apte à être retiré après la correction. Sur la
Dans un autre mode de réalisation, cet élément 90 peut être enlevé. La correction de la position du volet droit 18 et du volet gauche 17 par rapport au volet central 19, se fait dans un délai suffisamment court pour permettre cette correction avant la prise de la colle.In another embodiment, this
La présente invention n'est pas limitée aux modes de réalisation décrits et illustrés. De nombreuses modifications peuvent être réalisées, sans pour autant sortir du cadre défini par la portée du jeu de revendications. Une plieuse-colleuse peut également être une unité de pliage-collage, montée par exemple dans une machine en ligne, en aval d'une impression flexo, et d'une découpe rotative.The present invention is not limited to the embodiments described and illustrated. Many modifications can be made, without departing from the scope defined by the scope of the set of claims. A folder-gluer may also be a folding-gluing unit, mounted for example in an in-line machine, downstream of a flexo printing, and a rotary cut.
Claims (15)
- Method for treating a cut-out (10) intended to form, after folding-gluing, a folded flattened box, comprising the following steps:a) supplying a substantially flat cut-out (10) comprising a right edge (13), a left edge (14), a front edge (11), a rear edge (12), a right longitudinal groove (15) and a left longitudinal groove (16), the right longitudinal groove (15) and the left longitudinal groove (16) delimiting, with the right edge (13) and the left edge (14) at least three flaps among which a right flap (17), a left flap (18) and a central flap (19),b) applying of adhesive in a zone of the right flap (17) adjacent to the right edge (13) and/or in a zone of the left flap (18) adjacent to the left edge (14), in such a way that adhesive is present in an overlapping portion between the right flap (17) and the left flap (18),c) folding to 180° of the right flap (17) around the right longitudinal groove (15) in the direction of the central flap (19), and folding to 180° of the left flap (18) around the left longitudinal groove (16) in the direction of the central flap (19),d) closing of the folded right flap (17) and of the folded left flap (18) which are located one above the other at least in the overlapping portion,e) checking the position of the right edge (13) and of the left edge (14) and comparing this actual position with a predetermined position so as to determine a position deviation,f) when the position deviation exceeds an admissible deviation value, carrying out of the following substeps before the adhesive sets:f1) immobilising of the central flap (19), thenf2) gripping of the upper surface of the folded right flap (17) and of the folded left flap (18) by respectively at least one vacuum suction cup (21, 23, 24, 26), andf3) correcting of the position of the left flap (18) and/or of the right flap (17) by displacement of the vacuum suction cup (21, 23, 24, 26),g) applying of pressure between the right flap and the left flap in the overlapping position until the adhesive sets, andh) releasing of the central flap (19), of the right flap (17) and of the left flap (18).
- Method according to claim 1, wherein when the position deviation detected is a distance between the right edge and the left edge, not compliant with the admissible range, the step f2) is implemented, for the right flap and for the left flap (18), with two suction cups (21, 23, 24, 26) offset in the longitudinal direction and placed in a vacuum during the gripping, and the step f3) is implemented with lateral displacement of the two suction cups (21, 23, 24, 26) of the right flap (17) and/or of the left flap (18), so as to modify the distance between the right edge (13) and the left edge (14) in order to bring it within the admissible range.
- Method according to claim 1, wherein when the position deviation detected is a parallelism defect between the right edge and the left edge, the step f2) is implemented, for the right flap and for the left flap (18), with a single suction cup (21, 23, 24, 26) placed in a vacuum during the gripping, and the step f3) is implemented with lateral displacement of the suction cup (21, 23, 24, 26) of the right flap and/or of the left flap (18), so as to modify the orientation of the right flap and/or of the left flap (18) and being the right edge (13) and the left edge (14) substantially parallel between them.
- Method according to one of the preceding claims, wherein the immobilising of the central flap during the step f1) is carried out by its lower surface by means for immobilising operating with a depressurising by vacuum of the lower surface.
- Device for correcting the folded position of a cut-out (10) in a folder-gluer, for a substantially flat cut-out (10) comprising a right edge, a left edge, a front edge, a rear edge, a right longitudinal groove (15) and a left longitudinal groove (16), the right longitudinal groove (15) and the left longitudinal groove (16) delimiting, with the right edge and the left edge at least three flaps among which a right flap (17), a left flap (18) and a central flap (19), with the device comprising:- means for folding the right flap (17) and the left flap (18),- means for checking the relative position between the right edge and the left edge in the transverse direction after folding of the right flap (17) and of the left flap (18),- means for immobilising (71) the central flap (19),- means for gluing able to apply adhesive in a zone of the right flap (17) adjacent to the right edge (13) and/or in a zone of the left flap (18) adjacent to the left edge (14), in such a way that adhesive is present in an overlapping portion between the right flap (17) and the left flap (18),- means for correcting the position of the left flap and/or of the right flap, comprising at least one suction cup (21, 23, 24, 26) intended for the gripping of the right flap and at least one suction cup (21, 23, 24, 26) intended for the gripping of the left flap, with the suction cups (21, 23, 24, 26) being oriented downwards, mobile vertically and in the transverse direction and able to be subjected to a vacuum.
- Device according to claim 5, wherein the means for correcting comprise a pair of right suction cups (21, 23) and a pair of left suction cups (24, 26).
- Device according to claim 5, wherein, for each pair of suction cups (21, 23; 24, 26), a first suction cup is located at the front and a second suction cup is located at the rear, and in that the placing in a vacuum of the first suction cup is controlled independently of the placing in a vacuum of the second suction cup.
- Device according to claim 6 or 7, wherein the two suction cups (21, 23) of the pair of right suction cups are mounted on a right support (31) making it possible to simultaneously displace the two suction cups and in that the two suction cups (24, 26) of the pair of left suction cups are mounted on a left support (32) making it possible to simultaneously displace the two suction cups.
- Device according to one of claims 5 to 8, further comprising an element (90) able to be inserted between the right flap (17) and the left flap (18) before the folding thereof, and able to be removed after the correction.
- Device according to one of claims 5 to 9, wherein the means for controlling comprise an optical detection.
- Device according to one of claims 5 to 10, wherein the means for immobilising are able to create a depression by vacuum of the lower surface of the central flap of the cut-out (10).
- Device according to claim 11, wherein the means for immobilising comprise at least one ramp (71) provided with nozzles (72) oriented upwards and able to create a vacuum.
- Device according to claim 12, wherein the ramp (71) is mounted on a linear motor (80) accompanying the cut-out (10) during its travel and in that in the case of a correction, the vacuum is activated.
- Device according to one of claims 5 to 13, wherein the means for correcting and the means for immobilising are furthermore able to move forward in the longitudinal direction at the same speed as the cut-out (10) during its longitudinal travel.
- Folder-gluer machine provided with a device for correcting according to one of claims 5 to 14.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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PL15797862T PL3224038T3 (en) | 2014-11-24 | 2015-11-10 | Method and device for correcting the folded position of a cut-out in a folding-gluing machine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14020095 | 2014-11-24 | ||
PCT/EP2015/025079 WO2016082937A1 (en) | 2014-11-24 | 2015-11-10 | Method and device for correcting the folded position of a cut-out in a folder-gluer |
Publications (2)
Publication Number | Publication Date |
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EP3224038A1 EP3224038A1 (en) | 2017-10-04 |
EP3224038B1 true EP3224038B1 (en) | 2018-06-13 |
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EP15797862.8A Active EP3224038B1 (en) | 2014-11-24 | 2015-11-10 | Method and device for correcting the folded position of a cut-out in a folding-gluing machine |
Country Status (10)
Country | Link |
---|---|
US (1) | US11285684B2 (en) |
EP (1) | EP3224038B1 (en) |
JP (1) | JP6397140B2 (en) |
KR (1) | KR101887838B1 (en) |
CN (1) | CN107206723B (en) |
ES (1) | ES2679793T3 (en) |
PL (1) | PL3224038T3 (en) |
TR (1) | TR201809938T4 (en) |
TW (1) | TWI566984B (en) |
WO (1) | WO2016082937A1 (en) |
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- 2015-11-10 JP JP2017546009A patent/JP6397140B2/en active Active
- 2015-11-10 US US15/528,578 patent/US11285684B2/en active Active
- 2015-11-10 WO PCT/EP2015/025079 patent/WO2016082937A1/en active Application Filing
- 2015-11-10 CN CN201580073386.1A patent/CN107206723B/en active Active
- 2015-11-10 PL PL15797862T patent/PL3224038T3/en unknown
- 2015-11-10 ES ES15797862.8T patent/ES2679793T3/en active Active
- 2015-11-10 KR KR1020177017120A patent/KR101887838B1/en active IP Right Grant
- 2015-11-10 TR TR2018/09938T patent/TR201809938T4/en unknown
- 2015-11-12 TW TW104137312A patent/TWI566984B/en active
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PL3224038T3 (en) | 2018-09-28 |
ES2679793T3 (en) | 2018-08-31 |
TWI566984B (en) | 2017-01-21 |
TR201809938T4 (en) | 2018-08-27 |
EP3224038A1 (en) | 2017-10-04 |
JP2017538608A (en) | 2017-12-28 |
US11285684B2 (en) | 2022-03-29 |
KR101887838B1 (en) | 2018-09-10 |
CN107206723B (en) | 2019-07-26 |
CN107206723A (en) | 2017-09-26 |
US20180339479A1 (en) | 2018-11-29 |
JP6397140B2 (en) | 2018-09-26 |
TW201636269A (en) | 2016-10-16 |
WO2016082937A1 (en) | 2016-06-02 |
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