WO2015173671A1 - Dispositif d'affaiblissement et procédé permettant de réaliser une ligne d'affaiblissement dans des feuilles d'emballage - Google Patents

Dispositif d'affaiblissement et procédé permettant de réaliser une ligne d'affaiblissement dans des feuilles d'emballage Download PDF

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Publication number
WO2015173671A1
WO2015173671A1 PCT/IB2015/052576 IB2015052576W WO2015173671A1 WO 2015173671 A1 WO2015173671 A1 WO 2015173671A1 IB 2015052576 W IB2015052576 W IB 2015052576W WO 2015173671 A1 WO2015173671 A1 WO 2015173671A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting
line
stroke
weakening
longitudinal
Prior art date
Application number
PCT/IB2015/052576
Other languages
English (en)
Inventor
Andrea Toro
Original Assignee
System 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 System S.P.A. filed Critical System S.P.A.
Publication of WO2015173671A1 publication Critical patent/WO2015173671A1/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
    • B31B50/25—Surface scoring
    • B31B50/252—Surface scoring using presses or dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/02—Feeding or positioning sheets, blanks or webs
    • B31B50/04—Feeding sheets or blanks
    • B31B50/06—Feeding sheets or blanks from stacks
    • B31B50/066—Feeding sheets or blanks from stacks from above a magazine
    • 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
    • B31B50/14—Cutting, e.g. perforating, punching, slitting or trimming
    • 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
    • B31B50/14—Cutting, e.g. perforating, punching, slitting or trimming
    • B31B50/20—Cutting sheets or 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
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/74—Auxiliary operations
    • B31B50/92—Delivering
    • B31B50/98—Delivering in stacks or bundles

Definitions

  • the present invention relates to a weakening device and method suitable for realizing a weakening line in packaging sheets for realizing blanks for packages of articles.
  • the weakening line typically includes a crease crossing through the packaging sheet and two openings of the said crease.
  • crease it is meant a pre-folding line obtained for example via a pressing or impression method to be applied on packaging sheets so as to facilitate the folding thereof, thus preventing deformation and cracking.
  • the crease joins the two openings at the end thereof and facing outwards the packaging sheet.
  • the technical task of the present invention is to afford a weakening device and method so as to obviate the drawbacks of the prior art mentioned above.
  • a further object of the present invention is to provide a weakening device structurally simplified therefore not involving the presence of redundant devices.
  • the present invention relates to a weakening device suitable for realizing a weakening line in packaging sheets for realizing blanks for packages of articles.
  • Such weakening device comprises at least one rest plane adapted to receive a packaging sheet.
  • Said rest plane comprises at least one slot extending along a iine of longitudinal extension lying in the rest plane.
  • the weakening device further comprises a pressing member extending over a length parallel to the line of longitudinal extension and suitable for realizing a crease parallel to the line of longitudinal extension.
  • Activating means are operationally connected to the pressing member and suitable for generating a working stroke of said pressing member preferably in a plane perpendicular to the rest plane and containing the line of longitudinal extension.
  • the working stroke is perpendicular to the line of longitudinal extension and develops between a resting position and a pressing position, wherein the pressing member is predisposed for realizing the crease.
  • Cutting members are arranged relative to at least one end of the slot and configured for fashioning at least one opening at the end of the crease, said opening being defined by two longitudinal cutting lines and one transversal cutting line.
  • the cutting members comprise first cutting portions which are movable through the slot along a cutting stroke.
  • Connecting means are operationally interposed between the pressing member and the cutting members, and are configured for making the first portions integral with the pressing member during the working stroke so as to generate the cutting stroke.
  • the present invention in accordance with a second aspect, relates to a machine for realizing blanks for packages of made-to-measure articles, comprising feeding means for feeding packaging sheets, custom-made cutting means of packaging sheets and at least one weakening device.
  • the present invention relates to a weakening method able to realize a weakening line of packaging sheets for realizing blanks for packages of articles.
  • a packaging sheet on a rest plane comprising at least one slot extending along a line of longitudinal extension lying in the rest plane; it is further provided to obtain a crease parallel to the line of longitudinal extension of the packaging sheet by moving a pressing member along a working stroke, as well as to realize at least an opening at the end of the crease, said opening being defined by two longitudinal cutting lines and one transversal cutting line being movable trough the slot along a cutting stroke of the first cutting portions of the cutting members.
  • the first cutting portions are integral with the pressing member during the working stroke so as to generate the cutting stroke.
  • the present invention allows to realize both the crease and the opening/s at the and thereof in a single passage, thereby simplifying the structure of the plant also reducing production times.
  • a single slot crossing through the rest plane along the line of longitudinal extension is preferably provided.
  • two end slots can be made available which are connected for example by a groove, suitable for enabling realization of the crease.
  • the activating means are suitable for generating a return stroke of the pressing member between a pressing position and a resting position.
  • the activating means are particularly configured for making the first cutting portions integral with the pressing member during the return stroke.
  • the working stroke and/or the return stroke lie in a vertical plane so that the resting position of the pressing member is a raised position, wherein said pressing member keeps a distance from the rest plane and therefore from the packaging sheet; conversely, the pressing position is a lowered position, in which the pressing member comes into contact with the packaging sheet lying on the rest plane, pressing it relative to the line of longitudinal extension so as to obtain the crease.
  • the working stroke is vertical and facing downwards
  • the return stroke is vertical and facing upwards.
  • the working stroke can be vertical and facing upwards and the return stroke vertical facing downwards.
  • the connecting means comprises a frame.
  • the frame preferably comprises a first crosspiece which is rigidly mounted on the pressing member and a second crosspiece arranged opposite the first one relative to the rest plane.
  • the first cutting portions are inserted in the frame between the first and second crosspiece.
  • the frame comprises two risers that connect the first and second crosspiece thus shaping a preferably rectangular frame.
  • the second crosspiece comprises a sliding surface, for example a surface made up of Teflon ®, facing inwardly the frame.
  • the first cutting portions being movable through the slot of the rest plane, are dragged by the first crosspiece, particuiarly by the frame, if present, both along the cutting stroke and the return stroke.
  • the first crosspiece can be configured for generating the cutting stroke of the first cutting portions through the slot, thereby designating the return stroke to return devices, for example of the elastic type.
  • the activating means are associated to the first crosspiece and then to the frame, if present.
  • a castle is integral with the first crosspiece and provided with sliding guides.
  • a rack preferably two racks, are fixed to the castle and respectively engage a toothed wheel which is associated to a motor solidly constraint to a frame.
  • the first cutting portions comprise two longitudinal laminae arranged parallel to one another and to the line of longitudinal extension and perpendicular to the rest plane.
  • Each longitudinal lamina is suitable for interacting with a longitudinal edge of the slot of the rest plane so as to obtain a longitudinal cutting line of the end opening along the cutting stroke.
  • each longitudinal lamina defines a respective blade.
  • Such blade is preferably inclined in a plane perpendicular to the rest plane.
  • the longitudinal laminae are inserted between the first and the second crosspiece, in particular within the frame.
  • Said longitudinal laminae are inter alia movable relative to the first and second crosspiece, for example to the frame, along an adjustable range of travel parallel to the line of longitudinal extension of the slot.
  • the longitudinal laminae are mounted on opposite sides of a supporting plate comprising a base resting on the sliding surface of the second crosspiece, where present.
  • the longitudinal laminae define a first slide channel parallel to the line of longitudinal extension and predisposed for receiving at least partially the pressing member.
  • the longitudinal laminae also comprise a transverse blade-shaped portion defining an "L" blade wherein the transverse portions thereof may cooperate with a transverse fixed blade or with a fixed striker.
  • each anti-tip plate extending parallel to the line of longitudinal extension.
  • the two anti-tip plates are arranged externally on opposite sides of the pressing member, said pressing member protruding from said anti-tip plates at one of the pressing portion thereof.
  • each anti-tip plate defines a second slide channel with the pressing member, said slide channel being parallel to the line of longitudinal extension and suitable for receiving at least partially a longitudinal lamina.
  • elastic elements interposed between the longitudinal laminae and the supporting plates so as to maintain said longitudinal laminae in contact with a longitudinal edge of the slot of the rest plane.
  • the elastic elements may include spring washers for example arranged on opposite sides of a central washer.
  • the elastic elements are housed in a seat of the supporting plate.
  • a plurality of elastic elements can be disposed.
  • the cutting members comprise second cutting portions configured for defining a fixed striker during the cutting stroke of the first cutting portions.
  • the first cutting portions comprise a first transversal element arranged perpendicularly to the line of longitudinal extension and movable so as to pass through the slot along the cutting stroke.
  • the second cutting portions comprise a second transversal element arranged perpendicularly to the line of longitudinal extension.
  • the first and second transverse elements are predisposed for cooperating so as to obtain the line of transversal cutting.
  • the first transversal element is a transversal striker.
  • the second transversal element is a transversal blade.
  • the cutting members comprise reciprocal sliding means interposed between the first and second cutting portions, so as to enable the cutting stroke of the first cutting portions with respect to the second cutting portions.
  • the reciprocal sliding means may include a shoe, said shoe being integral with the first cutting portions and sliding with respect to a guide integral with the second cutting portions.
  • adjustment means are provided configured for moving the cutting members along an adjustable range of travel parallel to the line of longitudinal extension.
  • first and second cutting portions are integral one another along the adjustable range of travel.
  • reciprocal sliding means are configured for enabling the integral movement of the first cutting portions and second cutting portions along the adjustable range of travel.
  • each set being arranged at one end of the slot of the rest plane.
  • the cutting members of each set are configured for fashioning an opening at the end of the crease.
  • the weakening method particularly provides one or more of the following steps.
  • the first cutting portions are preferably integral with the pressing member during the return stroke, in accordance with a possible embodiment, there is provided to move the first cutting portions with respect to the second cutting portions, configured for defining a fixed striker during the cutting stroke of the first cutting portions.
  • FIG. 1 is a plan view of a packaging sheet
  • FIG. 2 is a schematic perspective view of a machine for realizing blanks for packages of made-to-measure articles, according to a possible embodiment
  • FIG. 3 is a schematic perspective view of a weakening device according to a possible embodiment
  • FIG. 4 is a schematic perspective view of the weakening device of Figure 3 from a different angle, wherein some elements have been omitted so as to highlight others;
  • FIGS. 5-6 are schematic perspective views of an enlarged detail of the weakening device of Figure 3 or 4 according to different angles;
  • FIG. 7 is a schematic front view of the weakening device of Figure 3 or 4;
  • FIG. 8 is a sectional view of an enlarged detail of the weakening device according to the line BB of Figure 7;
  • FIG. 9 is a schematic perspective view of some details of the weakening device of Figure 1 ;
  • FIG. 10 is an enlarged view of a detail of figure 9 illustrated with partially separate parts;
  • Figures 11 and 12 are schematic views, respectively a side and perspective view, of a detail of Figure 10.
  • the numeral 1 overall indicates a machine for realizing blanks 2 for made-to-measure packages of articles, for example boxes of "American" type.
  • the machine 1 is suitable for being inserted in a plant for realizing made- to-measure packages of articles wherein, once the size (width and length) of the package plan development have been determined, the machine 1 provides to cut the needed packaging sheet 3 and realizes the blank 2 which will be further sent to an automatic or manual station which shall provide in turn to form the package.
  • Figure 2 illustrates a packaging sheet 3, for example in the form of a cardboard, wherefrom the blank 2 will be fashioned.
  • a starting point can be a plurality of packaging sheets 3 already prepared or a continuous module 4 of folded paper.
  • the machine 1 comprises a store 5 wherefrom the continuous module 4 is withdrawn. From said continuous module 4, single packaging sheets 3 are cut, for example by means of a first cutting device 6. Alternatively or in addition to the store 5, the machine 1 may comprise a store 7 wherefrom the packaging sheets 3 already predisposed, are taken. In the event of packaging sheets already prepared, the width of the package, and therefore the width of the packaging sheet 3, is previously established according to the type of product/article which is to be packed, whereas its length is adapted on a continuous basis, by consecutively pasting packaging sheets having same width.
  • the machine 1 comprises feeding means for feeding packaging sheets 3, configured for moving said packaging sheets through the devices predisposed for obtaining the blank 2.
  • Such devices may for example comprise means for custom cutting of the packaging sheets 3.
  • a weakening device suitable for realizing a weakening line 9 in the packaging sheets 3.
  • the weakening device 8 is associated to a frame T of the machine 1.
  • the weakening line 9 is a processing performed relative to a line of longitudinal extension L, along which the packaging sheet shall be folded so as to obtain two incident package walls, thereby facilitating the folding step.
  • the packaging sheet undergoes a double processing which leads to the realization of a crease 9a crossing the packaging sheet along the line of longitudinal extension L, and of two openings 9b at the end of the crease 9a.
  • Said crease 9a connects the two end openings 9b thereof.
  • a single end opening can be also provided.
  • each end opening 9b is open outwardly the packaging sheet 3.
  • each end opening is defined by two longitudinal cutting lines 10 and a transversal cutting line 11.
  • longitudinal and transversal are particularly referred to directions being respectively parallel and perpendicular to the line of longitudinal extension L
  • the weakening device 8 comprises a rest plane 12 predisposed for receiving a packaging sheet.
  • the rest plane 12 is, by way of example, horizontal.
  • the rest plane 12 has been omitted to highlight further characteristics of the weakening device.
  • the rest plane 12 includes at least one slot 13 which extends along a line of longitudinal extension L lying in the rest plane 12; this means that the slot 13 has a larger size than that of other slots which corresponds to a length thereof.
  • the slot 13 and the line of longitudinal extension L are, by way of example, horizontal.
  • the line of longitudinal extension L of the slot 13 defines the line of longitudinal extension of the crease 9a which will thus be obtained on the packaging sheet.
  • the pressing member 14 extends for a length L parallel to the line of longitudinal extension L.
  • the pressing member 14 exhibits a larger size than the other ones, corresponding to a length L of the pressing member.
  • the pressing member 14 develops for example, horizontally, parallel to the line of longitudinal extension L.
  • the pressing member 14 is made of a plate located along a plane perpendicular to the rest plane 12 and containing the line of longitudinal extension L.
  • the plate defining the pressing member 14 is arranged vertically and with one of its largest size (length I) parallel to the line of longitudinal extension L.
  • the pressing member 14 is suitable for realizing, in the packaging sheet disposed on the rest plane 12, a crease 9a parallel to the line of longitudinal extension L.
  • the pressing member 14 will be further described below, when referring to the section of Figure 8.
  • the pressing member 14 is rigidly mounted on a first crosspiece 15a.
  • the first crosspiece 15a is part of a frame 15 further comprising a second crosspiece 15b, disposed on the side opposite the first crosspiece 15a relative to the rest plane 12.
  • Two risers 16a and 16b connect the first and second crosspiece thereby forming the frame 15, preferably of rectangular shape.
  • the second crosspiece 15b includes a sliding surface 17, for example a surface made up of Teflon ®, facing inwardly the frame itself, the function of which wili be described later on.
  • activating means operationally connected to the pressing member 14 have been indicated.
  • the activating means 18 are suitable for generating a working stroke 19 of the pressing member 14 in a plane perpendicular to the rest plane 12, said rest plane 12 containing the line of longitudinal extension L.
  • the working stroke 9 is perpendicular to the line of longitudinal extension L and extends between a resting position of the pressing member 14 (for example that illustrated in Figure 3), and a pressing position (not shown) in which the pressing member 14 is able to form the crease 9a.
  • the resting position of the pressing member 14 is a raised position wherein the pressing member 14 is kept at a distance from the rest plane 2 and thus from the packaging sheet, conversely, the pressing position is a lowered position in which the pressing member 14 is in contact with the packaging sheet disposed on the rest plane 12, pressing it relative to the line of longitudinal extension L so as to obtain the crease 9a.
  • the working stroke 19 is vertical and directed downwards. Alternatively it may be eventually provided that the working stroke is vertical and facing upwards.
  • the activating means 18 are associated to the first side 15a and then to the frame 15, if present.
  • a castle 20 integral with the first crosspiece 15a and supplied with sliding guides 21 , said sliding guides 21 being for example parallel, in particular vertical, with respect to the working stroke 19.
  • a rack 22, preferably two racks, are fastened to the castle 20 engaging respectively with a toothed wheel 23 associated to a motor, not shown, which motor is integral with a fixed frame T of the weakening device 8.
  • the activating means 18 are suitable for generating a return stroke of the pressing member 14.
  • the return stroke (not shown) is parallel to the working stroke 19 but in the opposite direction, in particular, it extends between the pressing position and the resting position.
  • the motor (not shown) can be operated in both directions so as to rotate the toothed wheels 23 in both directions, thereby causing a lowering or a raising of the castle 20 and consequently of the pressing member 14.
  • the cutting members of each set are configured for fashioning an opening 9b at the end of the crease 9a in a packaging sheet disposed on the rest plane 12.
  • the cutting members of each set comprise first cutting portions which are movable through the slot along a cutting stroke. More in detail, the first cutting portions are inserted in the frame 15, if present, between the first crosspiece 15a and the second crosspiece 15b.
  • the first cutting portions comprise two longitudinal laminae 26a and 26b, each of which preferably defining a respective blade X, said longitudinal laminae 26a and 26b being arranged parallel to one another and to the line of longitudinal extension L and perpendicular to the rest plane 12.
  • Each blade X is inclined in a plane being perpendicular to the rest plane.
  • each blade X is inclined so as to come in contact with the packaging sheet substantially at a point which in the cutting stroke 25 is slidabie from outside to inside of the packaging sheet, that is towards the transversal cutting line 1.
  • Each longitudinal laminae 26a, 26b is adapted to interact with a longitudinal edge of the slot 13 in order to receive a longitudinal cutting line 10 along the cutting stroke 25.
  • the longitudinal laminae 26a, 26b are inserted in the frame 5, if present, between the first crosspiece 15a and the second crosspiece 15b, said laminae 26a, 26b being slidabie relative to the first crosspiece 15a, in particular with respect to the frame 15, along an adjustable range of travel 27, parallel to the line longitudinal extension L
  • the adjustable range of travel 27 can exhibit an approaching or distancing movement of the two sets of cutting members one to another.
  • the longitudinal laminae 26a, 26b define a first slide channel 28 parallel to the line of longitudinal extension L and adapted to receive at least partially the pressing member 14, in particular the pressing portion 14a thereof.
  • the longitudinal laminae 26a, 26b are mounted on opposite sides of a supporting plate 29 comprising a base 30 resting on the sliding surface 17, if present.
  • two anti-tip plates 31 extend parallel to the line of longitudinal extension L and are arranged externally on opposite sides of the pressing member 14. in particular, said pressing member 14 protrudes from the anti-tip plates 31 , relative to the pressing portion 14a thereof ( Figure 8).
  • each anti-tip plate 31 defines a second slide channel 32 with the pressing member 14, said slide channel 32 being parallel to the line of longitudinal extension L and adapted to receive at least partially a longitudinal lamina 26a, 26b.
  • Elastic elements 33 are interposed between the longitudinal laminae 26a, 26b and the supporting plate 29, so as to keep the blades in contact with the longitudinal edge of the slot 13 of the rest plane 12 ( Figure 10).
  • the elastic elements 33 may include spring washers 33a, for example, arranged on opposite sides of a centra! washer 33b.
  • the elastic elements 33 are housed in a seat 33c of the supporting plate 29.
  • a plurality of elastic elements 33 can be predisposed.
  • the cutting members of each set comprise second cutting portions configured for defining a fixed striker during the cutting stroke 25 of the first cutting portions.
  • the first cutting portions comprise a first transverse element, preferably a transverse striker 34, arranged perpendicularly to the line of longitudinal extension L and movable crossing through the slot 13 along the cutting stroke 25. If present, a free edge of the supporting plate 29 defines the transverse striker 34.
  • the second cutting portions comprise a second transverse element, preferably a transverse blade 35, second cutting portions being arranged perpendicularly to the line of longitudinal extension L. The first and second transverse element are fit for cooperating so as to obtain said transverse cutting line 11.
  • the longitudinal laminae 26a, 26b, with the respective supporting plate 29, define first cutting portions movable through the slots 13, along the cutting stroke 25 and the return stroke, said first cutting portions being dragged by the first crosspiece 15a, in particular by the frame 15, if present.
  • the first crosspiece 15a may be configured for generating the cutting stroke 25 of the first cutting portions through the slot 13, by assigning the return stroke to return devices, for example of the elastic type.
  • connecting means are provided which are operationally interposed between the pressing member 14 and the cutting members, said connecting means being configured for making the first portions integral with the cutting member 14 during the working stroke 19, so as to generate the cutting stroke 25.
  • the connecting means are also configured for making the first cutting portions integral with the pressing member 14 during the return stroke.
  • the cutting members of each set comprise reciprocal sliding means interposed between the first cutting portions and the second cutting portions, so as to enable the cutting stroke 25 of the first cutting portions with respect to the second cutting portions.
  • the reciproca! sliding means may comprise, by way of example, a sliding shoe 36, integral with the first cutting portions (for example with the supporting plate 29, namely with the longitudinal laminae 26a, 26b); said sliding shoe being s!idabie with respect to a guide 37 integral with the second cutting portions (for example with the transverse blade 35).
  • first cutting portions and the second cutting portions are integral with one another along the adjustable range of travel 27.
  • the reciprocal sliding means are configured for enabling the integral movement of the first and second cutting portions along the adjustable range of travel 27,
  • adjustment means for example comprising a rack 38 integral with the second cutting portions (in particular with the transverse blade 35).
  • a sliding bar 39 slidably connected to the second cutting portions ⁇ in particular to the transverse blade 35).
  • only one cutting set can be provided at one end of the slot 13.
  • the weakening device 8 When in use, the weakening device 8 provides to prepare a packaging sheet 3 on the rest plane 12 and to realize a crease 9a parallel to the line of longitudinal extension L on the packaging sheet by moving the pressing member 14 along the working stroke 19.
  • At least one opening 9b preferably two openings 9b at the end of the crease 9a, are realized by moving the first cutting portions through the slot 13 along the cutting stroke 25, at the same time when the crease 9a is realized.
  • the working stroke 19 of the pressing member 14 causes the cutting stroke 25 of the first cutting portions, in particular, the first cutting portions are integral with the cutting member 14 during the working stroke 19 so as to generate the cutting stroke 25,
  • the pressing member 14 is moved along the return stroke and the first cutting portions are integral with the pressing member 14 during the return stroke.
  • the first cutting portions are moved with respect to the second cutting portions, configured for defining a fixed striker during the cutting stroke of the first cutting portions.
  • the cutting members are moved along the adjustable range of travel 27 parallel to the line of longitudinal extension L for defining the size of the of the end openings 9b, in particular the length of the longitudinal cutting lines 10.
  • the proposed solution is able to achieve in a single passage both the crease and the end opening (or end openings) thereof, in the cutting stroke 25, the longitudinal laminae 26a, 26b (each provided with a blade X), make a scissor movement with the longitudinal edges of the slot 13, whereas the transverse striker 34 acts as a striker for the transverse blade 35, which remains fixed during the cutting stroke 25.
  • the longitudinal laminae also include a transverse blade portion (in other words, the first cutting portions comprise an "L"-shaped blade) and the transverse blade 35 may be replaced with a simple fixed striker.
  • the longitudinal laminae 26a, 26b thoroughly cross the packaging sheet. in other words, said longitudinal laminae 26a, 26b preferably perform a maximum cutting stroke 25.
  • the inclined configuration of the blade X allows to not have an impact onto the packaging sheet with an entire plane, thereby realizing the cutting substantially relative to a movable point along the longitudinal cutting line 10. In such a way a progressive effort is applied on the packaging sheet during the cutting.
  • the adjustment of the cutting members position along the adjustable range of travel 27 enables to obtain the longitudinal cutting lines 10 having a greater length than that obtainable with a single cutting stroke of the cutting member.
  • the cutting members are placed at the ends of the packaging sheet and a first cutting stroke (working stroke) is performed so as to obtain a longitudinal cutting line equal to Y.
  • a first cutting stroke working stroke
  • each set of cutting members is brought towards the center of the packaging sheet for a stretch equal to K (for example by activating the adjustment means), and a second cutting stroke (working stroke) is carried out.
  • the anti-tip plates 31 are integral with said pressing member 14, preventing the packaging sheet's edges from rising.

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Abstract

La présente invention concerne un dispositif d'affaiblissement (8) comprenant au moins un plan d'appui (12) présentant une fente (13) et conçu pour recevoir une feuille d'emballage (3). La fente (13) s'étend le long d'une ligne d'extension longitudinale (L) se trouvant dans ledit plan d'appui (12). Un élément de compression (14) s'étend sur une longueur (I) parallèle à la ligne d'extension longitudinale (L) et est conçu pour obtenir un pli (9a) parallèle à la ligne d'extension longitudinale (L). Des moyens d'activation (22, 23) sont raccordés de manière fonctionnelle à l'élément de compression (14) et sont conçus pour générer une course de travail (19) de l'élément de compression (14) dans un plan perpendiculaire au plan d'appui (12) et contenant la ligne d'extension longitudinale (L). Au moins un ensemble d'éléments de coupe (26a, 26b, 34, 35) disposés au moins au niveau d'une extrémité de la fente (13) et configurés pour réaliser au moins une ouverture (9b). Les éléments de coupe comprennent des premières parties de coupe (26a, 26b, 34) déplaçables à travers la fente (13) le long d'une course de coupe (25). Des moyens de raccordement (15a, 15b ; 15) sont intercalés de manière fonctionnelle entre l'élément de compression (14) et les éléments de coupe, et sont configurés pour faire en sorte que les premières parties de coupe sont formées d'un seul tenant avec l'élément de compression (14) pendant la course de travail (19) de façon à générer la course de coupe (25).
PCT/IB2015/052576 2014-05-16 2015-04-09 Dispositif d'affaiblissement et procédé permettant de réaliser une ligne d'affaiblissement dans des feuilles d'emballage WO2015173671A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMO20140136 2014-05-16
ITMO2014A000136 2014-05-16

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CN105774028A (zh) * 2016-04-28 2016-07-20 句容市鼎盛纸箱包装有限公司 一种纸板手动切槽机
CN105774027A (zh) * 2016-04-28 2016-07-20 句容市鼎盛纸箱包装有限公司 一种纸板切槽机
CN105799215A (zh) * 2016-04-28 2016-07-27 句容市鼎盛纸箱包装有限公司 一种可调式纸板手动切槽装置
CN106829084A (zh) * 2017-02-06 2017-06-13 江阴市汇通包装机械有限公司 双切刀装置
IT201600100840A1 (it) * 2016-10-07 2018-04-07 Tecnobrevetti S N C Di Ponti Giuseppe & Bianconi Mirella Apparato per realizzare un foglio di cartone stampato per imballaggio a partire da una porzione di cartone
CN114393612A (zh) * 2018-04-05 2022-04-26 阿维康公司 包装机进给、分离和压痕机构

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US3079846A (en) * 1961-06-30 1963-03-05 Box O Matic Machine Inc Method and apparatus for scoring and slotting carton blanks
US3163095A (en) * 1962-10-09 1964-12-29 Rite Size Corrugated Machinery Slotting tool
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CN105774028A (zh) * 2016-04-28 2016-07-20 句容市鼎盛纸箱包装有限公司 一种纸板手动切槽机
CN105774027A (zh) * 2016-04-28 2016-07-20 句容市鼎盛纸箱包装有限公司 一种纸板切槽机
CN105799215A (zh) * 2016-04-28 2016-07-27 句容市鼎盛纸箱包装有限公司 一种可调式纸板手动切槽装置
CN105799215B (zh) * 2016-04-28 2019-01-08 福建兴方舟科技有限公司 一种可调式纸板手动切槽装置
IT201600100840A1 (it) * 2016-10-07 2018-04-07 Tecnobrevetti S N C Di Ponti Giuseppe & Bianconi Mirella Apparato per realizzare un foglio di cartone stampato per imballaggio a partire da una porzione di cartone
CN106829084A (zh) * 2017-02-06 2017-06-13 江阴市汇通包装机械有限公司 双切刀装置
CN114393612A (zh) * 2018-04-05 2022-04-26 阿维康公司 包装机进给、分离和压痕机构
CN114393612B (zh) * 2018-04-05 2024-04-05 阿维康公司 包装机进给、分离和压痕机构

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