EP3530449B1 - Appareil et procédé pour recouvrir des boîtes en carton ayant des coins non joints - Google Patents

Appareil et procédé pour recouvrir des boîtes en carton ayant des coins non joints Download PDF

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Publication number
EP3530449B1
EP3530449B1 EP19159411.8A EP19159411A EP3530449B1 EP 3530449 B1 EP3530449 B1 EP 3530449B1 EP 19159411 A EP19159411 A EP 19159411A EP 3530449 B1 EP3530449 B1 EP 3530449B1
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EP
European Patent Office
Prior art keywords
box
thrusting
moulding
scraping
covering
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP19159411.8A
Other languages
German (de)
English (en)
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EP3530449A1 (fr
Inventor
Giovanni Broccolini
Giulio SALETTI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Europrogetti SRL
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Europrogetti SRL
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Publication date
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Publication of EP3530449A1 publication Critical patent/EP3530449A1/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
    • B31B50/26—Folding sheets, blanks or webs
    • B31B50/44—Folding sheets, blanks or webs by plungers moving through folding dies
    • B31B50/46—Folding sheets, blanks or webs by plungers moving through folding dies and interconnecting side walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/26—Folding sheets, blanks or webs
    • B31B50/52—Folding sheets, blanks or webs by reciprocating or oscillating members, e.g. fingers
    • 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
    • B31B2105/00—Rigid or semi-rigid containers made by assembling separate sheets, blanks or webs
    • B31B2105/002—Making boxes characterised by the shape of the blanks from which they are formed
    • B31B2105/0024—Making boxes having all side walls attached to the bottom
    • 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
    • B31B2120/50—Construction of rigid or semi-rigid containers covered or externally reinforced

Definitions

  • the present invention relates to the field of the production of paper covered boxes made of cardboard such as, in particular but not necessarily, folding carton or micro corrugated cardboard, and more precisely it relates to an apparatus provided with novel features specifically in relation to the paper covering unit and step, when boxes with previously unjoined corners are processed.
  • the invention further extends to a method according to which the apparatus operates.
  • the known technique provides various systems.
  • the application of the tape generates an additional layer of material (the tape itself) which in turn causes a surface irregularity; it is an irregularity which remains and is noted after the arrangement of the covering paper, whose glossy finish may highlight the ridge that forms due to the effect of the tape portion. Also, the required application of pressure may cause deformations and subsequent irregularities which can be noticed on the finished box.
  • a further aspect of this known system is in connection with the application time of the heat heat-seal tape, generally of about 0.6 sec, which results in a limitation to the speed and productivity of the machines which implement this type of solution. Also the need to perform an initial heating of the machine has an unfavourable effect in terms of time consumption.
  • boxes are also known in which the joining is omitted precisely to avoid appearance-related problems, and the structural stabilization of the box is transferred to the covering sheet alone.
  • the box thus obtained has more modest solidity characteristics, which however remain adequate for certain uses, in which on the contrary the aesthetic cleanliness deriving from the complete absence of joining elements or materials is of particular value and appreciation.
  • the cardboard box with the bottom adhering to the paper is transferred to the covering station with the lateral walls of the box kept in the vertical position by a series of metal guides.
  • a mould that reciprocates in the vertical direction (and having slightly smaller dimensions than those of the final box) is inserted into the box, engaging with it and moving the same downwards so as to make it cooperate at various heights with fixed folders that, by abutment, carry out the required folds on the covering paper sheet.
  • the mould comprises two superimposed modules, which can be distanced from one another along the movement axis. Accordingly, when a first module (the lower one, i.e. the actual mould) remains inside the box, pressing the bottom of it, the upper module (or counter-mould) can be lifted so as to allow the folding of the covering sheet above the upper edges of the side walls of the box.
  • the box that has not been joined at the corners is by nature unstable, and technical solutions must be used that keep all the lateral walls well stuck against the mould, guaranteeing adequate stability and dimensional precision, and therefore ensuring that the paper adheres to the outer walls of the box correctly.
  • the aforesaid technical solutions include some technical measures, all unsatisfactory to various extents.
  • use is made of vacuum.
  • channels are formed inside the mould through which a suction reaches the sides of the mould, attracting the flaps of cardboard resting thereon, through suitable holes with a shallow counter-bore such as to realize the required suction effect.
  • the object of the present invention is to overcome this state of the art, by providing an apparatus and process that, specifically in relation to a covering station/unit directed to boxes with previously unjoined corners, can lead to obtaining boxes of high quality standards, with high reliability and with structurally and functionally simple mechanical systems, as well as being able to prevent the obstruction of the folding movements of the covering sheet and interferences with the other functional components of the machine.
  • the box is indicated with A, and can be obtained in a known way by erecting a flat blank having a bottom A1, two first side walls A2, A3 and two second side walls A4, A5, opposite one another two by two and erected orthogonally from the bottom A1.
  • the box A has been coupled to a covering sheet B arranged, here again, with traditional techniques below the bottom A1.
  • the sheet B has been pre-glued and is located, at the start of the covering process, in the appointed region as shown in Figure 5a , outstretched in a flat extension and showing, separated by appropriate folding lines, various portions B1-B5 adapted to cover respectively the bottom A1 and the side walls A2-A5.
  • the latter are erected by folding but, clearly, not stabilized to each other, a corner joining step being omitted in this type of boxes, being it replaced by the binding action of the covering sheet.
  • tuck-in flaps extend flexibly, to be tucked-in around the corners and edges of the box side walls. More precisely in the example, according to a typical but not limiting solution, such tuck-in flaps comprise on each of the two first portions B2, B3, i.e. the portions intended to be erected for covering the pair of first side walls of the box (the mutually opposite walls that are erected first), two flaps for wrapping the corners indicated respectively with B2a, B2b, B3a, B3b (the latter being indeed only visible in other figures which will be discussed below).
  • flaps are actually intended to be turned around respective sides/corners of the respective first side walls A2, A3 which are covered by the respective sheet portion B2, B3, to adhere beyond the corner itself on the second side walls A4-A5, before the second covering sheet portions B4, B5 are in turn erected to complete the covering.
  • the covering apparatus as a whole according to the invention has general characteristics that can be considered alike those of the prior art, providing in particular a mould 1 with a lower mould module 11 and a counter-mould 12, reciprocatingly movable according to a moulding direction Z, and a plate (not shown here) for supporting the box, in turn movable according to direction Z with known driving systems.
  • the plate extends over a plane XY orthogonal to the moulding direction Z.
  • the first two side portions B2, B3, are glued to the box, with the related corner-wrapping flaps B2a, B2b, B3a, B3b that remain open in this step, coplanar to the portions B2, B3 from which they extend, each in the immediate vicinity of a corner of the box.
  • the main aspect of the present invention comes into action at this point, and notably relates to the reliable and precise stabilization of the second walls A4, A5 against the mould 1 before and during the wrapping of the corners by the flaps B2a, B2b, B3a, B3b, i.e. the step that irreversibly stabilizes the connection between the side walls of the box and that must therefore be performed with utmost accuracy.
  • thrusting means 3 are provided, arranged beyond (and below) the folding means of the first portions of the sheet, namely the brushes 2, and comprising a member that is movable between a rest or inactive position, in which the member clears a region swept by the portions of the sheet B still extended, thus avoiding blocking them, and an active position in which with a side entry with respect to the forming direction it is able to exert a pressure on the outside of a second wall A4 or A5, thrusting it onto the mould, pressure that affects an area of the wall itself not interfering with the area to be wrapped by the corresponding wrapping flap.
  • the aforesaid member is rotatable about an axis of rotation incident with the plane XY, even more preferably as in the present embodiment an axis Z' substantially parallel to the moulding direction Z.
  • the member, indicated with 31, can therefore in this case and still advantageously take a configuration, when seen in section over a plane orthogonal with the axis of rotation, at a square angle or an angled profile also at an angle different from 90°.
  • the member 31 in the present example therefore has a distal wing 311 with an edge 311a along which the contact for thrusting the second wall of the box is exerted in the active position ( figures 2 , 3 and 4 ), and a proximal wing 312 angled with respect to the distal wing 311 and through which the member is supported via a hinge 32 that materialises the axis of rotation Z' and that is suitably spaced from the region occupied/swept by the second portions B4, B5 still stretched out.
  • the hinge 32 links the member with a fixed structural element of the apparatus, indicated by the number 4 and visible in particular in Figure 2 .
  • four identical thrusting devices 3 are envisaged, although with different orientations, one for each corner of the base of the box and as such adapted to carry out its action in proximity to the relative vertical corner and in association with the folding of the corresponding wrapping flap, folding which will be described below. Also in this connection, however, the described arrangement is not to be intended as limitative.
  • each thrusting device 3 is associated here in a single operating unit with a scraping device 5, in turn supported by the structure of the apparatus and comprising an appropriately shaped scraping blade 51, with a longitudinal extension along the direction Z and adapted to translate in a crosswise direction X aligned with the corresponding second side wall A4, A5 of the box, actually to enter into abutment on the wrapping flap, fold it and smooth it on such wall.
  • the reciprocating motion of the scraping blade 51 is activated by its own (second) linear actuator 52, between a retracted position ( Figure 3 ) and a maximum advancement position ( Figure 4 ), both in the space that separates the box from the thrusting member 31 in the active position.
  • An arm 53 supports the scraping blade 51, which connects the blade 51 to a movable head of the linear actuator 52 with a certain lateral projection (i.e. crosswise with reference to the actuation direction).
  • the actuator 52 of the scraping blade 51 is arranged above the hinge 32 of the thrusting device, and the arm 53 has freedom of movement in a fracture 312a formed on the proximal wing 312 of the thrusting member 31.
  • Figure 5e shows the subsequent step.
  • the thrusting members 31 of the thrusting devices 3 are rotated (as also indicated by the arrows) to the active position, pressing gently on the second side walls A4, A5 of the box in adherence to the mould (not shown here, as mentioned), in an area of the walls themselves that cannot be reached and therefore not affected by the scraping blades in the active position, thus ensuring perfect geometric conformity and the perfect matching of the second walls with the first walls. Maintaining this active position, and therefore making the arrangement of the walls of the box definitely stable, the scraping devices come into action ( Figure 5f ), with the blades 51 that advance to their active position, closing the wrapping flaps B2a, B2b, B3a, B3b around the corners and on the aforesaid walls.
  • the advantages of the invention are clear from the present description.
  • the thrust on the side walls on which the corners are wrapped by the covering sheet carried out by active devices with sideways entry/movement, allows rigorous and reliable position control, ensuring the optimal quality of the finished product.
  • the thrusting devices are structurally and functionally simple and, for their being inherently active and controllable, are free from the fine-tuning problems shown by known clips.

Landscapes

  • Making Paper Articles (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Cartons (AREA)

Claims (12)

  1. Appareil de recouvrement de boîtes pour la production de boîtes en carton recouvertes, comprenant :
    des moyens de moulage (1) animés d'un mouvement de va-et-vient dans une direction de moulage (Z), adaptés pour être insérés à l'intérieur d'une boîte (A) ayant des parois latérales érigées à partir d'un fond de base (A1) mais non précédemment jointes à leurs coins, et pour déplacer ladite boîte le long de ladite direction de moulage (Z) ;
    des premier et second moyens de pliage fixes (2, 6), disposés en séquence le long de ladite direction de moulage (Z) et adaptés pour coopérer avec lesdits moyens de moulage (1) pour plier en séquence des première et seconde parties d'une feuille de recouvrement préencollée (B) disposé sous la boîte (A) sur les parois latérales respectives de la même boîte (A) ;
    des moyens de raclage (5) disposés entre lesdits premier et second moyens de pliage fixes (2, 6) le long de ladite direction de moulage, adaptés pour se déplacer vers l'avant et se rétracter le long d'une direction transversale vers et depuis une position active afin de plier les rabats d'enroulement de coin respectifs des dites premières parties autour des dits coins ; et
    des moyens de stabilisation pour stabiliser au moins certaines des dites parois de la boîte par rapport auxdits moyens de moulage,
    caractérisé en ce que lesdits moyens de stabilisation comprennent des moyens de poussée (31), agencés en association avec lesdits moyens de raclage (5) et mobiles entre une position inactive dans laquelle ils sont aptes à libérer une région de passage desdites secondes parties (B4, B5) de ladite feuille (B) en condition d'étirement avant le pliage, et une position active dans laquelle, en entrant latéralement par rapport à ladite direction de moulage (Z), ils sont adaptés pour pousser au moins certaines desdites parois latérales de la boîte (A) contre lesdits moyens de moulage (1) pendant une phase active desdits moyens de raclage (5), en exerçant une poussée sur une zone de la même paroi qui n'est pas affectée par lesdits moyens de raclage dans ladite position active, et
    des moyens d'entraînement (33) adaptés pour entraîner lesdits moyens de poussée entre lesdites positions.
  2. Appareil selon la revendication 1, dans lequel lesdits moyens de poussée comprennent au moins un élément de poussée (31) monté pivotant autour d'un axe de rotation (Z') interceptant un plan (XY) perpendiculaire à ladite direction de moulage (Z).
  3. Appareil selon la revendication 2, dans lequel ledit axe de rotation (Z') dudit élément de poussée pivotant (31) est sensiblement parallèle à ladite direction de moulage (Z).
  4. Appareil selon l'une des revendications 2 et 3, dans lequel ledit au moins un élément de poussée (31), dans une vue en coupe sur un plan orthogonal à l'axe de rotation, a une disposition de profil généralement inclinée, à angle droit ou à angle supérieur ou inférieur à 90°.
  5. Appareil selon la revendication 4, dans lequel ledit élément de poussée (31) comprend une aile distale (311) avec un bord (311a) adapté pour exercer le contact de poussée d'une paroi de boîte relative dans ladite position active, et une aile proximale (312) faisant un angle par rapport à ladite aile distale (311) et par laquelle l'élément est supporté via une charnière (32) matérialisant ledit axe de rotation (Z') et espacée de ladite région de passage desdites secondes parties de feuille (B4, B5) en position étirée, ladite charnière (32) contraignant ledit élément de poussée (31) vers un élément structurel fixe (4) de l'appareil.
  6. Appareil selon la revendication 5, dans lequel lesdits moyens d'entraînement (33) comprennent, pour ledit au moins un élément de poussée (31), un actionneur linéaire (33) articulé entre ledit élément structurel fixe (4) et une manivelle (34) solidaire de ladite aile proximale (312).
  7. Appareil selon l'une des revendications 5 et 6, dans lequel lesdits moyens de raclage comprennent, pour chaque élément de poussée (31), une lame de raclage (51) apte à se déplacer entre sa position active et une position rétractée, toutes deux dans un espace qui sépare la boîte et l'élément de poussée (31) dans sa position active, lesdits moyens de raclage comprenant en outre un second actionneur linéaire (52) pour actionner ladite lame (51) et un bras (53) reliant ladite lame (51) audit second actionneur linéaire et faisant saillie latéralement par rapport à la direction d'actionnement, ledit second actionneur (52) étant agencé sur ladite charnière (32) desdits moyens de poussée (3), ledit bras (53) étant mobile à l'intérieur d'une découpe (312a) formée dans ladite aile proximale (312) dudit élément de poussée (31).
  8. Appareil selon la revendication 7, dans lequel ladite lame de raclage (51) est conformée avec une extension longitudinale le long de ladite direction de moulage (Z) et est adaptée pour se translater dans une direction transversale (X).
  9. Appareil selon l'une quelconque des revendications 3 à 8, dans lequel un certain nombre d'éléments de poussée identiques (31) sont prévus, un pour chaque angle de base de ladite boîte et chacun associé à ses propres moyens de raclage (51).
  10. Appareil selon la revendication 9, comprenant quatre unités, chacune avec un élément de poussée (31) et un moyen de raclage (51), disposées par paires mutuellement en opposition.
  11. Un procédé de recouvrement de boîte réalisé avec un appareil selon l'une quelconque des revendications précédentes, dans lequel lesdits moyens de poussée se déplacent de ladite position inactive à ladite position active dans un poste d'emballage en aval, selon ladite direction de moulage (Z), d'une étape de pliage d'au moins une première partie (B2, B3) de ladite feuille de couverture (B) sur une première paroi respective (A2, A3) de ladite boîte, poussant latéralement au moins une seconde paroi (A4, A5) de la boîte ; lesdits moyens de raclage (5) se déplaçant alors vers leur position active tandis que les moyens de poussée (3) restent toujours en position active ; puis, les moyens de raclage et les moyens de poussée se déplacent vers leur position inactive, et en final, la boîte quitte ledit poste d'emballage toujours selon ladite direction de moulage pour la réalisation du pliage d'au moins une seconde partie (B4, B5) de ladite feuille de recouvrement sur la seconde paroi relative (A4, A5) de la boîte.
  12. Procédé selon la revendication 11, dans lequel la boîte arrive audit poste d'emballage avec deux premières parties (B2, B3) mutuellement opposées de ladite feuille de couverture (B) repliées sur les premières parois respectives (A2, A3) de ladite boîte, lesdits moyens de poussée (3) poussant les deux secondes parois (4, 5) mutuellement opposées avant que lesdits moyens de raclage (5) ne plient des paires respectives de rabats d'emballage (B2a, B2b, B3a, B3b) desdites secondes parties (B2, B3) de ladite feuille.
EP19159411.8A 2018-02-27 2019-02-26 Appareil et procédé pour recouvrir des boîtes en carton ayant des coins non joints Active EP3530449B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102018000003079A IT201800003079A1 (it) 2018-02-27 2018-02-27 Apparecchiatura e procedimento per la rivestitura di scatole in cartone prive di cucitura

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Publication Number Publication Date
EP3530449A1 EP3530449A1 (fr) 2019-08-28
EP3530449B1 true EP3530449B1 (fr) 2020-11-11

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EP19159411.8A Active EP3530449B1 (fr) 2018-02-27 2019-02-26 Appareil et procédé pour recouvrir des boîtes en carton ayant des coins non joints

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4147986A3 (fr) * 2021-09-10 2023-06-07 Lundgren Machinery AB Procédé et dispositif pour la fabrication d'une boîte à double paroi à partir d'une ébauche à double paroi

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111994328B (zh) * 2020-08-25 2022-05-13 蓝探科工业自动化(江苏)有限公司 上盖成型连杆
CN115042477B (zh) * 2022-06-01 2023-08-15 青岛乐之泰实业有限公司 一种数字印刷纸盒用的裱纸翻转装置

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Publication number Priority date Publication date Assignee Title
US1879830A (en) * 1929-05-17 1932-09-27 Stokes & Smith Co Method for forming boxes and the like
US2713813A (en) * 1954-04-12 1955-07-26 Triolo Louis Side-wall roller for box wrapping machines
US3802280A (en) * 1970-08-10 1974-04-09 Fmc Corp Box wrapping machine

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4147986A3 (fr) * 2021-09-10 2023-06-07 Lundgren Machinery AB Procédé et dispositif pour la fabrication d'une boîte à double paroi à partir d'une ébauche à double paroi

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IT201800003079A1 (it) 2019-08-27
EP3530449A1 (fr) 2019-08-28

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