WO2013118080A1 - Procédé et dispositif de contrôle de la qualité de boîtes pliées et collées - Google Patents

Procédé et dispositif de contrôle de la qualité de boîtes pliées et collées Download PDF

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Publication number
WO2013118080A1
WO2013118080A1 PCT/IB2013/051030 IB2013051030W WO2013118080A1 WO 2013118080 A1 WO2013118080 A1 WO 2013118080A1 IB 2013051030 W IB2013051030 W IB 2013051030W WO 2013118080 A1 WO2013118080 A1 WO 2013118080A1
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WO
WIPO (PCT)
Prior art keywords
box
folded
glued
pack
face
Prior art date
Application number
PCT/IB2013/051030
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English (en)
Inventor
Giorgio Domenico GHELFI
Original Assignee
Ghelfi Ondulati S.P.A.
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 Ghelfi Ondulati S.P.A. filed Critical Ghelfi Ondulati S.P.A.
Priority to EP13713235.3A priority Critical patent/EP2812181A1/fr
Publication of WO2013118080A1 publication Critical patent/WO2013118080A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/006—Controlling; Regulating; Measuring; Improving safety

Definitions

  • the present invention relates to a method and to a corresponding device for controlling the quality of folded and glued boxes.
  • the present invention allows advantageous, but not exclusive application in the quality control of corrugated cardboard or paperboard folded and glued boxes, as provided by a folding-gluer machine, to which the description that follows will make explicit reference without thereby losing in generality.
  • a folding-gluer machine is an automatic machine which comprises, in general, an input station to receive, one at a time, flat sheets of punched corrugated cardboard blanks, i.e. corrugated cardboard sheets suitably cut and shaped with a die-cutter, a glue applying station for applying glue on appropriate edges of the blank sheet, a folding station for folding the blank sheet by overlapping one upon the other edges of opposed panels so as to form a corresponding folded and glued box, a collection station for stacking the folded boxes, one above the other, so as to form packs of folded boxes and an output station for feeding packs of folded boxes to a strapping machine.
  • the single folded box before it can be used, must be so to speak "shaped", i.e. opened and brought into its shape of regular parallelepiped with preset sizes. Often the "shaping" of the folded box is done automatically using special forming machines, which can function properly only if the geometry of the folded and glued boxes respects the preset tolerances.
  • the glue used is vinyl glue, which has relatively long drying times. This causes the real gluing to begin with the formation of the stack of folded boxes, thanks to the pressure exerted by each box on the one below, and ends when the box pack is already released from the folding-gluer machine .
  • the quality of the folded boxes which is measured by evaluating the respect of tolerances on the geometry of the folded box produced, is normally controlled, for reasons of simplicity, before the folded box exits the folding-gluer machine, therefore when the gluing of the folded box is not yet finished.
  • the quality control of the boxes is performed when the folded box has not yet assumed its final shape and is therefore not possible to guarantee that the box produced respects, once opened, the geometry and the preset sizes.
  • the respect of the preset tolerances becomes extremely important when the folded box is fed to a forming machine.
  • the purpose of the present invention is to provide a method and a corresponding device for controlling the quality of cardboard or paperboard folded and glued boxes produced by a folding-gluer machine, which method and device are free from the drawbacks described above and, at the same time, are easy and inexpensive to manufacture.
  • FIG. 1 illustrates a flat cardboard blank sheet to be folded and glued to obtain a folded and glued box
  • FIG. 2 illustrates a cardboard box obtained by folding and gluing the cardboard sheet of Figure 1, without folding defects
  • FIG. 3 illustrates a cardboard box obtained by folding and gluing the cardboard sheet of Figure 1, but with folding defects ;
  • Figure 4 illustrates, in a schematic way and according to a plan view, a plant for producing cardboard folded and glued boxes as that of Figure 2, which comprises the control device to control the quality of the cardboard boxes according to the present invention
  • FIG. 5 illustrates part of the control device of Figure 4 according to a front view
  • FIGS 6 and 7 illustrate the principle of image acquisition of box packs according to which the control device of Figure 4 operates.
  • FIG. 8 and 9 illustrate, schematically, two images of two opposite faces of a box pack, which images are acquired according to the principle of Figures 6 and 7.
  • FIG 1 With 1 is generally designated, a flat punched corrugated cardboard blank sheet, which for simplicity will be hereinafter called blank, from which a cardboard box is obtained, by folding it along its own transverse weakened lines 3 and longitudinal weakened lines 2, in the shape of a parallelepiped of the type so-called "American box".
  • the weakened lines 2 and 3 define two panels 4 adapted to form respective major lateral walls of the American box and two panels 5 alternating with panels 4 and adapted to constitute respective minor lateral walls of the American box.
  • the weakened lines 2 define, moreover, two panels 6a and 6b, which are arranged on opposite sides of the outer panel 4, i.e. the panel that is arranged at a first longitudinal end of the blank 1, two panels 7a and 7b, which are arranged on opposite sides of the inner panel 4, i.e. the panel that is arranged between the two panels 5 of the blank 1, two wings 8a and 8b, which are arranged on opposite sides of the inner panel 5, i.e. of the panel that is arranged between the two panels 4 of the blank 1, and two wings 9a and 9b, which are arranged on opposite sides of the outer panel 5, i.e. the panel that is arranged at the opposite longitudinal end of the blank 1.
  • the two panels 6a and 7a are adapted to form the head wall of the closed packaging box and the two panels 6b and 7b are adapted to constitute the bottom wall of the closed packaging box.
  • the wings 8a and 9a are adapted to be folded, in correspondence to a weakened line 2, one towards the other so as to be arranged below the panels 6a and 7a and the wings 8b and 9b are adapted to be folded, in correspondence to the other weakened line 2, one towards the other so as to be arranged below the panels 6b and 7b.
  • the blank 1 comprises, finally, a gluing strip 10, which is arranged along one transverse side, that is, parallel to the weakened lines 2, of the outer panel 5, is divided by the outer panel 5 by a further transverse weakened line 11 and is adapted to be glued, by means of glue, to a transverse gluing portion 12 of the outer panel 4.
  • Figure 2 shows a folded and glued box 13 obtained by folding and gluing the blank 1 of Figure 1.
  • the box 13 is obtained by applying the glue on one side of the strip 10, or on one side of the transverse portion 12, by folding the blank 1 along a first weakened line 3 so that the outer panel 5 overlaps the inner panel 4 and the wings 9a and 9b will respectively rest on the panels 7a and 7b, and, finally, by folding the blank 1 along a second weakened line 3 so as the outer panel 4 overlaps the inner panel 5, the panels 6a and 6b will respectively rest on the wings 8a and 8b and, partially, on the panels 7a and 7b and the portion 12 will overlap, for gluing, to the strip 10.
  • the box 13 is formed, therefore, by an American box folded and flattened on itself, i.e. with the outer walls 4 and 5 overlapping the inner walls 5 and 4, and open in correspondence to the head and bottom walls.
  • the gluing between the portion 12 and the strip 10 takes place by means of the pressure exerted by the weight of other overlapping boxes 13 to form a box pack.
  • Gluing is consolidated with a subsequent binding (by way of a strap) of the box pack.
  • the box 13 of Figure 2 is free from folding defects, i.e. the outer panels 4 and 5 are perfectly aligned above the corresponding adjacent panels 5 and 4.
  • the box 13, before it can be used, must be "shaped", i.e. opened and brought into its regular parallelepiped shape following a known folding sequence.
  • Figure 3 illustrates a box similar to box 13 of Figure 2, but having folding defects consisting, for example, in non-perfect alignment between the panels 4 and 5 corresponding to the more outer adjacent panels 5 and 4.
  • FIG 4 With 20 is indicated, as a whole, a plant for producing punched corrugated cardboard folded and glued boxes of the type of box 13 shown in Figure 2.
  • the plant 20 comprises one or more automatic machines connected in line to define a machining path PI.
  • the automatic machines of the plant 20 comprise a die-cutting machine 21, or simply die- cutter, to produce the blanks 1 (Figure 1) by die-cutting a sheet of corrugated cardboard, a folding-gluer machine 22 of known type, which is adapted to fold and glue, as described above, the blanks 1 in order to obtain the boxes 13 ( Figure 2) and to provide the boxes 13 grouped into box packs 14, each comprising, more boxes 13 stacked one upon the other, and a strapping machine 23, which is adapted to bind each box pack 14 with a respective strap 15 of plastic or other material to provide a respective bound box pack 16.
  • the machining path Pi terminates in an output station 24 comprising, for example, a robotizer palletizer of known type to load the bound box packs 16 onto transport platforms, for example pallets.
  • Figure 4 illustrates the plant 20 seen from above, and therefore the box packs 14 and 16 are shown according to a plan view, i.e. the upper box 13 of each box pack 14 and 16 can be seen.
  • the plant 20 also comprises a conveyor 25 for conveying the blanks 1 from the die-cutting machine 21 to the folding-gluer machine 22, a conveyor 26 for conveying the box packs 14 from the folding-gluer machine 22 to the strapping machine 23 and a conveyor 27 for conveying the bound box packs 16 from the strapping machine 23 to the output station 24.
  • the production machine of blanks 21 is not in line with the folding-gluer machine 22 and the blanks 1 are fed manually by an operator to the folding-gluer machine 22, or the functions of the pair of machines 21 and 22 are performed by a so-called casemaker that receives a corrugated cardboard sheet, die-cuts the cardboard sheet to obtain a corresponding blank 1 and folds and glues the blank 1 to provide a corresponding box 13.
  • the plant 20 comprises a control device 28 for controlling the quality of the boxes 13 of each of the bound box packs 16, and in particular to verify whether each box pack 16 contains at least a box 13 with folding defects.
  • the control device 28 comprises image acquisition means comprising, for example, one or more digital cameras 29a, 29b arranged between the strapping machine 23 and the output station 24 to the side or sides of the conveyor 27 for acquiring one or more images of the bound box pack 16 to be controlled, and a processing unit 30 configured to process the acquired images so as to measure size parameters of the boxes 13 of each box pack 16 and to verify, on the basis of the size parameters measured, if one or more boxes 13 of the box pack 16 have folding defects such that may not conform to preset tolerances.
  • the control device 28 comprises a display screen 31 for indicating, with specific messages and/or images and/or visual signals in general, that the box pack 16 contains at least one defective box 13.
  • the control device 28 comprises a support portal 32 arranged at a point of the conveyor 27 so that the box packs 16 are conveyed, in use, through the support portal 32 in the feeding direction 27a.
  • Two cameras 29a are mounted on the support portal 32 so as to be arranged on opposite sides of the conveyor 27 with respective oblique optical axes, converging towards the center of the conveyor 27, and directed substantially in the direction opposite to that of the feeding direction 27a to acquire, from two different angles, at least two respective front images of a box pack 16 before the latter crosses the support portal 32.
  • each of the front images is visible, according to a respective angle, at least part of the front or frontal face of the pack 16.
  • the control device 28 also comprises a projector 33a mounted on the central portion of the support portal 32 in an elevated position, with respect to the height of the box packs 16 which pass under the support portal 32 ( Figure 5), and with its projection axis facing downwards and substantially in the direction opposite to that of the feeding direction 27a for projecting on the front face of a box pack 16, before the latter crosses the support portal 32, a light pattern which allows to enhance the contrast of images acquired by the cameras 29a for the purposes of subsequent image processing, and in particular to perform stereometric reconstructions of the faces of the box pack 16.
  • the light pattern is constituted, for example, by a row of bright parallel lines.
  • two additional cameras 29b are mounted on the support portal 32 in a similar manner to the cameras 29b, but with the optical axes directed substantially in the feeding direction 27a to acquire, from two different angles, at least two respective rear images of a box back 16 after the latter has crossed the support portal 32.
  • the optical axes directed substantially in the feeding direction 27a to acquire, from two different angles, at least two respective rear images of a box back 16 after the latter has crossed the support portal 32.
  • in each of the rear images is visible, according to a respective angle, at least part of the rear face of the pack 16.
  • control device 28 comprises a further projector 33b mounted on the support portal 32 in a similar manner to the projector 33a, but with its projection axis directed substantially in the feeding direction 27a for projecting the light pattern on the rear face of a box pack 16, after the latter has crossed the support portal 32.
  • the front and rear faces of the pack 16 are the two opposite faces of the pack 16 that are substantially perpendicular to the transverse weakened lines 2 of the blanks 1 from which originate the boxes 13: the front face is that which passes first under the support portal 32.
  • the plant 20 also comprises a conveyor 34, which defines a scrap path P2 that departs from a certain point Q of the machining path PI downstream of the cameras 29 and terminates in an output station 35, wherein the box packs 16 containing non-conforming boxes 13 are collected, and deflecting means 36, which are controlled by the control device 28 to divert the box packs 16 containing non-conforming boxes 13 along the scrap path P2.
  • a first section of the conveyor 34 has the transport plane coplanar with that of the conveyor 27 in the point Q and the deflecting means 36 comprise a movable pusher 37, transversely to the feeding direction 33, between a retracted rest position, wherein it leaves free the conveying plane of the conveyor 27, and a forward operating position, wherein it invades the transport plane of the conveyor 27 to move the eventual box pack 16 on the conveyor 34.
  • the control device 28 comprises a memory 38 for storing reference values of the box folding quality indicators and respective tolerance values that must be observed by each box 13 of the box pack 16.
  • the memory 38 is preferably, but not necessarily, integrated in the processing unit 30.
  • the quality indicators are defined as a function of size parameters of the boxes 13 measurable from scanned images of the respective box pack 16. With reference again to Figure 3, the measurable size parameters of a box 13 comprise, for example:
  • Figures 8 and 9 illustrate, schematically and by way of example, a front image ( Figure 8) and a rear image ( Figure 9) of a pack 16 wherein a box 13' is present having defects detectable as a longitudinal distance A2 ' larger than the average longitudinal distance A2 of the other boxes 13 and a longitudinal distance Al ' less than the average longitudinal distance Al of the other boxes 13.
  • the defects shown are deliberately exaggerated to aid the reader in understanding, as the extent of the defects that occur in reality is very noticeable at first glance.
  • the processing unit 30 is configured to process the two front images of each pack 16 for measuring, for each box 13 of the pack 16, the respective longitudinal A2 and transverse EQ2 distances.
  • the two front images of the pack 16 are combined to obtain a stereometric reconstruction of the front face of the pack 16 which allows to evaluate also if the depth and the transverse distance EQ2 is measured on the basis of the front stereometric reconstruction. More specifically, the distance EQ2 is measured between the vertex of the angle of the panel 6b nearest to the portion 12 and the plane defined by the front face.
  • the longitudinal distance A2 is measured by at least one of the front images.
  • the processing unit 30 is configured, furthermore, to process the two rear images of each pack 16 for measuring, for each box 13 of the pack 16, the respective longitudinal Al and transverse EQ1 distances, in a way similar to what was done for the measurement of the distances A2 and EQ2 based on the front images.
  • the two images of the rear face of the pack 16 are combined to obtain a stereometric reconstruction of the rear face of the pack 16, the transverse distance EQ1 is measured, on the basis of the rear stereometric reconstruction, between the vertex of the angle of the panel 6a most near to the portion 12 and the plane defined by the rear face.
  • the image processing provides, first of all, to identify all the boxes 13 of the box pack 16 to be controlled.
  • the identification of the boxes 13 consists, for example, in identifying the single boxes 13 and numbering them, starting from the bottom or from the top of the box pack 16, from one of the front or rear images of the box pack 16.
  • the identification of individual boxes 13 also allows to measure the respective thickness values S of the corrugated cardboard.
  • the identification of individual boxes 13 and the measurement of size parameters Al, A2, EQ1, EQ2, and S of all the boxes 13 are obtained using a special processing images software loaded into the processing unit 30.
  • the quality indicators comprise, for example, a longitudinal spacing indicator G, which is defined as a function of the longitudinal distances Al and A2, a squaring indicator SQ, which is defined in terms of transverse distances EQ1 and EQ2, a longitudinal parallelism defect indicator PL, which is defined in terms of transverse distances EQ1 and EQ2, and a transverse parallelism defect indicator PT, which is defined as a function of the longitudinal distances Al and A2.
  • the parallelism defect indicators are also known as "tail-fishing" indicators.
  • the quality indicators G, SQ, PL and PT are calculated with the following formulas:
  • G max (Al, A2 ) ;
  • SQ module (EQ1-EQ2) ;
  • PT module (A1-A2) .
  • maximum (Al, A2) it is meant the maximum value between Al and A2.
  • module (A1-A2) is meant the module or absolute value of the difference between Al and A2.
  • the “module” operation performed on the single distances EQl and EQ2 is necessary to purify the sign of the measurements made with respect to the reference plane, i.e. the plane of the face in question of the package 16.
  • the thickness S despite being a dimensional parameter measurable directly from the scanned images, can also be considered a quality indicator.
  • the resistance of the cardboard box is also guaranteed by a proper thickness of the corrugated cardboard. An improper folding of the blank 1 could crush the corrugated cardboard excessively, compromising the final strength of the cardboard.
  • a folding defect can occur, consisting of a non-perfect alignment between the more outer panels 4 and 5 of inverted type with respect to that illustrated by Figure 3, i.e. a defect wherein is only the outer panel 5 that is misaligned with respect to the underlying panel 4.
  • Said folding defect is detectable using another pair of size parameters constituted by the transverse distances between the vertices of the angles of the wings 9a and 9b closest to the strip 10 with respect to the longitudinal edges of the underlying panels 7a and 7b, i.e. with respect to the planes of the front and rear faces.
  • each of the two indicators PL and SQ must be calculated as the maximum value of the relative parallelism or squaring defect indicators calculated in relation to the panel 4 and to the panel 5.
  • the memory 38 is adapted to store reference values Gr, SQr, PLr, PTr and Sr of the quality indicators G, SQ, PL, PT and S and their tolerance values TG, TSQ, TPL, TPT and TS.
  • the processing unit 30 is configured to calculate, as a function of the size parameters measured Al, A2, EQ1, EQ2 by way of the above formulas, the actual values Gm, SQm, PLm, PTm and Sm of the quality indicators G, SQ, PL, PT and S for each box 13 of the box pack 16 to be controlled. Obviously, the actual value Sm coincides with the measured thickness S, i.e. without any formula.
  • the processing unit 30 is configured, furthermore, to compare, for each box 13 of the box pack 16, the actual values Gm, SQm, PLm, PTm and Sm with the corresponding reference values Gr, SQr, PLr, PTr and Sr in order to verify whether that box 13 conforms to the tolerance values. In particular, the processing unit 30 checks whether the absolute value of the differences between the actual values Gm, SQm, PLm, PTm and Sm and the respective reference values Gr, SQr, PLr, PTR and Sr is lower than the respective tolerance values TG, TSQ, TPL, TPT and TS .
  • the processing unit 30 is configured to control the display screen 31 so that it displays a message and/or an image and/or visual signals in general in order to report to an operator that the box pack 16 just checked contains at least one box 13 which is not conformed to at least one of the tolerance values TG, TSQ, TPL, TPT and TS.
  • the display screen 31 will be commanded to display the identity of those boxes 13 of the box pack 16 which do not conform to at least one of the tolerance values TG, TSQ, TPL, TPT and TS, for each box that does not conform, those quality indicators G, SQ, PL, PT and S whose tolerance values TG, TSQ, TPL, TPT and TS are not respected.
  • the signalling of the box packs 16 containing boxes 13 that do not conform is followed by the actuation of the diverter means 36 for diverting the box pack 16 along the scrap path P2.
  • the processing unit 30 is configured, furthermore, to store in the memory 38, for each box 13 one or more box packs 16, the corresponding actual values Gm, SQm, PLm, PTm and Sm the indication of those quality indicators TG, TSQ, TPL, TPT and S whose respective tolerance values TG, TSQ, TPL, TPT and TS are not respected.
  • the processing unit 30 is configured to produce, as a function of the data stored in the memory 38, a report, in the form of table and/or graph printable on paper, of the control of a group of box packs 16. If the group of box packs 16 represents, for example, an order placed by a customer, then the report provides a sort of control certificate guaranteeing compliance with the tolerances requested by the customer for the order.
  • the box packs 14, and therefore also the respective bound box packs 16, comprise a single box 13.
  • the image processing for the measurement of size parameters Al, A, EQ1, EQ2, and S is simplified, as it is not necessary to identify several boxes 13 in the same box pack 16.
  • the image acquisition means 29a, 29b, 33a and 33b are arranged between the folding-gluer machine 22 and the strapping machine 23 in a point of the conveyor 26 to acquire images of box packs 14, i.e. those that are not yet bound.
  • control device 28 comprises only the two cameras 29b to acquire the front images or only the two cameras 29b to acquire rear images
  • the processing unit 30 is configured to process the acquired images in order to measure, in case of the presence of the cameras 29a, the distances A2 and EQ2 and the thickness S or, in case of the presence of the cameras 29b, the distances Al and EQ1 and thickness S.
  • the squaring indicator SQ and the longitudinal parallelism defect indicator PL are equal to the longitudinal distance EQ1 or EQ2.
  • the longitudinal spacing indicator G and the transverse parallelism defect indicator PT are equal to the longitudinal distance A2 or Al .
  • control device 28 comprises a single camera and the plant 10 comprises, in place of the conveyor 27, an input conveyor for feeding the box packs 16 to be controlled to the controller device 28, an output conveyor to extract, from the control device 28, the controlled box packs 16 and handling means arranged between the input conveyor and the output conveyor for moving the box pack 16 in front of the single camera so to acquire multiple images according to different views of the box pack 16.
  • the control device 28 has been illustrated and described as operated “in-line” in the plant 20. However, the control device 28 is also suitable for "off-line” use. In the off-line use, the control device 28 allows to perform precise controls at the receipt of the goods (box packs 16) by customers, or to carry out check-in at the entrance of the packaging lines, where the filling of the boxes 13 with other products takes place . From the above description it is evident that the control device 28 is no more than one possible implementation of a method for controlling the quality of the boxes 13 arranged in the form of packs 14 or 16, which method is provided with the present invention and comprises the following main steps:
  • At least one image of each box pack 14 or 16 to be controlled is acquired by means of image acquisition means 29a, 29b, 33a, 33b;
  • the acquired images are processed to measure, for each box 13 of the box pack 14 or 16, the size parameters Al, A2, EQ1,
  • the actual values Gm, SQm, PLm, PTm, Sm are compared with the reference values Gr, SQr, PLr, PTr, Sr to verify whether that box 13 conforms to the tolerance value TG, TSQ, TPL, TPT, TS; and
  • a pack of boxes 14 or 16 comprises at least one box 13 that does not conform to the tolerance values TG, TSQ, TPL,
  • control device 28 and, above all, the control method implemented by the control device 28 have been described with reference to folded and glued boxes obtained from a blank 1 of corrugated cardboard.
  • control device 28 and the corresponding control method are also suitable for the folding quality control of folded and glued boxes obtained from blank of generic cardboard, i.e. non-corrugated cardboard or paperboard, or obtained from alveolar polypropylene blank, the so-called “twin wall sheets", or polyethylene terephthalate (PET) .
  • the main advantage of the method for controlling the quality of folded and glued boxes 13 and of the corresponding control device 28 described above is to allow the operator of the plant 20 or the folding-gluer machine 22 to monitor in real time the quality of each box 13 produced and, therefore, to rapidly correct the adjustments of the folder-gluer machine 22 to reduce the occurrence of folding defects, without having to perform manual controls on individual samples (boxes 13) taken at random at the exit of the plant 20 or of the folding-gluer machine 22. Consequently, the amount of discarded box packs 16 is greatly reduced and, being able to automatically discard the box packs 16 with defective boxes 13 it is possible to provide box packs 16 which conform 100% to the predetermined tolerances.
  • a further advantage is the possibility, by way of the analysis of the actual values of the quality indicators calculated for a certain number of box packs 16, to identify malfunctions or the wear of a part of the machines upstream of the control of the box packs 16.
  • This possibility allows to reduce the machines maintenance costs, since it allows, for example, to replace a worn part of a machine only when the wear is such so as to compromise the quality of the boxes 13 produced. Very often, in fact, the replacement of worn parts takes place in a preventive way on scheduled basis, without actual wear being verified .

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Abstract

Procédé de contrôle de la qualité de boîtes pliées et collées (13) disposées sous la forme de paquets (14, 16). Au moins une image de chaque paquet de boîtes (14 ; 16) qui doit être contrôlé est acquise. Les images acquises sont traitées afin de mesurer, pour chaque boîte (13), les paramètres de taille respectifs (Al, A2, EQ1, EQ2, S). Pour chaque boîte (13) sont calculées des valeurs réelles (Gm, SQm, PLm, PTm, Sm) des indicateurs de la qualité (G, SQ, PL, PL, S) de pliage de boîte en fonction des paramètres de taille mesurés (Al, A2, EQ1, EQ2, S). Les valeurs réelles (Gm, SQm, PLm, PTm, Sm) calculées pour chaque boîte (13) sont comparées avec des valeurs de référence (Gr, SQr, PLr, PTr, Sr) des indicateurs de qualité (G, SQ, PL, PL, S) pour vérifier si ladite boîte (13) est conforme aux valeurs de tolérance (TG, TSQ, TPL, TPT, TS) des indicateurs de qualité. Les paquets de boîtes (14, 16) comprenant au moins une boîte (13) qui n'est pas conforme aux valeurs de tolérance (TG, TSQ, TPL, TPT, ST) sont mis au rebut.
PCT/IB2013/051030 2012-02-07 2013-02-07 Procédé et dispositif de contrôle de la qualité de boîtes pliées et collées WO2013118080A1 (fr)

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EP13713235.3A EP2812181A1 (fr) 2012-02-07 2013-02-07 Procédé et dispositif de contrôle de la qualité de boîtes pliées et collées

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IT000058A ITBO20120058A1 (it) 2012-02-07 2012-02-07 Metodo e dispositivo per controllare la qualita' di scatole piegate e incollate
ITBO2012A000058 2012-02-07

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WO2013118080A1 true WO2013118080A1 (fr) 2013-08-15

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014013166A1 (de) * 2014-09-04 2016-03-10 Masterwork Machinery Co., Ltd. Verfahren zur Steuerung einer Faltschachtelmaschine zur Qualitätssicherung
WO2016096157A1 (fr) * 2014-12-19 2016-06-23 Bobst Lyon Dispositif et procédé de contrôle de la qualité de boîtes pliables et installation de fabrication comprenant un tel dispositif de contrôle
WO2019034289A1 (fr) * 2017-08-17 2019-02-21 Bobst Mex Sa Procédé et machine permettant de contrôler la qualité d'un produit
DE102021000831B3 (de) 2021-02-17 2022-05-25 Ansgar Biestmann Verfahren zur optischen Überprüfung von bereits belasteten papierbasierenden Verpackungen zur Ermittlung einer potentiellen Wiederverwendbarkeit

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DE102014013166A1 (de) * 2014-09-04 2016-03-10 Masterwork Machinery Co., Ltd. Verfahren zur Steuerung einer Faltschachtelmaschine zur Qualitätssicherung
US10466687B2 (en) 2014-09-04 2019-11-05 Masterwork Group Co., Ltd. Method for controlling a folding box machine for quality assurance
KR101972681B1 (ko) * 2014-12-19 2019-04-25 봅스트 리옹 접이식 상자들의 품질을 점검하기 위한 기기와 방법 및 이러한 품질 관리 기기를 포함한 제조 설비
WO2016096157A1 (fr) * 2014-12-19 2016-06-23 Bobst Lyon Dispositif et procédé de contrôle de la qualité de boîtes pliables et installation de fabrication comprenant un tel dispositif de contrôle
KR20170091742A (ko) * 2014-12-19 2017-08-09 봅스트 리옹 접이식 상자들의 품질을 점검하기 위한 기기와 방법 및 이러한 품질 관리 기기를 포함한 제조 설비
CN107250775A (zh) * 2014-12-19 2017-10-13 鲍勃斯脱里昂公司 检查可折叠盒子的质量的检查装置和方法以及包括该检查装置的制造设备
JP2018503814A (ja) * 2014-12-19 2018-02-08 ボブスト リヨン 折畳み箱の品質を検査するための検査装置及び方法並びにこの検査装置を含む製造設備
TWI586523B (zh) * 2014-12-19 2017-06-11 巴柏斯特里昂公司 用於校驗摺疊箱子之品質的校驗裝置及方法與包含此種校驗裝置的製造設備
FR3030351A1 (fr) * 2014-12-19 2016-06-24 Bobst Lyon Dispositif et procede de controle de la qualite de boites pliables et installation de fabrication comprenant un tel dispositif de controle
US10421247B2 (en) 2014-12-19 2019-09-24 Bobst Lyon Checking device and method for checking the quality of foldable boxes, and manufacturing installation comprising this checking device
KR20200032744A (ko) * 2017-08-17 2020-03-26 봅스트 맥스 에스에이 제품의 품질을 검사하기 위한 방법 및 기계 장치
WO2019034289A1 (fr) * 2017-08-17 2019-02-21 Bobst Mex Sa Procédé et machine permettant de contrôler la qualité d'un produit
CN110998297A (zh) * 2017-08-17 2020-04-10 鲍勃斯脱梅克斯股份有限公司 用于检查产品质量的方法和机器
JP2020529611A (ja) * 2017-08-17 2020-10-08 ボブスト メックス ソシエテ アノニムＢｏｂｓｔ Ｍｅｘ ＳＡ 製品の品質を検査するための方法及び機械
AU2018316400B2 (en) * 2017-08-17 2021-07-15 Bobst Mex Sa Method and a machine for checking the quality of a product
US11327027B2 (en) 2017-08-17 2022-05-10 Bobst Mex Sa Method and a machine for checking the quality of a product
KR102419484B1 (ko) * 2017-08-17 2022-07-08 봅스트 맥스 에스에이 제품의 품질을 검사하기 위한 방법 및 기계 장치
JP7186216B2 (ja) 2017-08-17 2022-12-08 ボブスト メックス ソシエテ アノニム 製品の品質を検査するための方法及び機械
DE102021000831B3 (de) 2021-02-17 2022-05-25 Ansgar Biestmann Verfahren zur optischen Überprüfung von bereits belasteten papierbasierenden Verpackungen zur Ermittlung einer potentiellen Wiederverwendbarkeit

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