EP3263324B1 - Machine de formation de boîtes - Google Patents

Machine de formation de boîtes Download PDF

Info

Publication number
EP3263324B1
EP3263324B1 EP17174422.0A EP17174422A EP3263324B1 EP 3263324 B1 EP3263324 B1 EP 3263324B1 EP 17174422 A EP17174422 A EP 17174422A EP 3263324 B1 EP3263324 B1 EP 3263324B1
Authority
EP
European Patent Office
Prior art keywords
die
base plate
horizontal direction
machine according
dies
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.)
Not-in-force
Application number
EP17174422.0A
Other languages
German (de)
English (en)
Other versions
EP3263324A1 (fr
Inventor
Mr. Fulvio GIACOBBE
Mr. Dario PARINO
Mr. Andrea ANTONINI
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.)
Cavanna SpA
Original Assignee
Cavanna SpA
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 Cavanna SpA filed Critical Cavanna SpA
Publication of EP3263324A1 publication Critical patent/EP3263324A1/fr
Application granted granted Critical
Publication of EP3263324B1 publication Critical patent/EP3263324B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2100/00—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs
    • B31B2100/002—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs characterised by the shape of the blank from which they are formed
    • B31B2100/0024—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs characterised by the shape of the blank from which they are formed 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

Definitions

  • the present invention relates to a machine for forming boxes.
  • the invention relates to a system for simplifying the change of shape in a box-forming machine with interchangeable punches and forming dies.
  • machines are provided for forming boxes in which cardboard or plastic flat blanks are picked up from a pile and fed to a box-forming machine comprising at least one punch operated by a manipulator such as, for example, a robot or linear actuator, and at least one die carried by a fixed frame.
  • a manipulator such as, for example, a robot or linear actuator
  • the shape-change operations require a precise positioning of the dies with respect to the frame.
  • Box-forming machines can be provided with reference formations that facilitate the precise positioning of the dies with respect to the frame, but positioning errors are possible that compromise the correct operation of the machine.
  • FR-A1-2286706 discloses a machine for forming boxes comprising a frame on which a vertically movable male die is interchangeably mounted. Below the male die is a female die provided with cam profiles adapted to fold the side and end walls of a box. The female die can be removed from the folding station and replaced by a female die of different dimensions. For this purpose the female die is carried by a movable frame which is slidably movable on a pair of parallel rails which are supported by the main frame.
  • the object of the present invention is to provide a machine for forming boxes with interchangeable punches and dies, which simplifies the shape-change operations, and eliminates the risks of misaligning the forming tools.
  • this object is achieved by a box-forming machine having the characteristics forming the subject of claim 1.
  • numeral 10 indicates - in its entirety - a machine for forming boxes.
  • the machine 10 comprises a manipulator 12 including a support structure 14 and a movable head 16.
  • the machine 10 comprises a fixed frame 18 on which the boxes are formed.
  • the fixed frame 18 comprises two parallel guides 20 extending along a first horizontal direction X.
  • the forming dies are intended to be assembled on the frame 18 in the manner described below.
  • the movable head 16 of the robot 12 carries one or more interchangeable punches 22, which are intended to cooperate with respective dies fixed to the frame 18.
  • the machine 10 comprises one or more dies 24.
  • Each die 24 comprises a base plate 26 and a forming section 28 fixed to the base plate 26.
  • the base plate 26 of each die 24 comprises two positioning elements 30 that engage the guides 20 in a sliding manner in the direction X.
  • the positioning elements 30 consist of ribs projecting from the lower surface of the base plate 26 and which engage respective grooves 32 of the guides 20. The engagement between the positioning elements 30 and the guides 20 establishes a precise positioning of the dies 24 with respect to the frame 18 along a second horizontal Y direction Y, orthogonal to the first horizontal X direction X.
  • the base plate 26 of each die 24 has a first reference formation 34 configured for engaging a respective punch 22 to precisely position the die 24 with respect to the frame 18 along the first horizontal direction X.
  • the first reference formation 34 is formed by a C-shaped cut on an end portion of the base plate 26. The cut has two edges 34, parallel to the direction Y, which are in contact with respective surfaces of the punch 22, parallel to each other.
  • the reference formation 34 - from a constructional point of view - may assume different shapes, for example, it could be formed of a protruding rib parallel to the Y axis, which engages a corresponding groove formed on the punch 22.
  • the head 16 of the robot 12 is therefore used for the precise positioning of the dies 24 in the direction X.
  • This solution is advantageous because it means there is always a precise alignment between the punches 22 and the respective dies 24, even in the case of slight misalignments of the head 16 of the robot due to tolerances, clearances, etc.
  • the shape-change operation envisages - in a first step - the replacement of the punches 22 of the head 16 of the robot 12. Then, the head 16 is positioned in a predetermined reference position for the change of shape, in which the punches 22 are arranged at precise coordinates in the direction X. Then, the dies 24 are assembled using the grooves 32 of the guides 20 and the punches 22 as geometric references for the assembly of the dies 24. More specifically, the operator carries out the assembly of the dies 24 by engaging the reference formations 34 with their respective punches 22, and inserting the positioning elements 30 into the grooves 32 of the guides 20. In this manner, the correct positioning of the dies 24 with respect to the frame 18 is ensured, both in the X direction and in the Y direction.
  • the dies 24 are fixed to the frame 18.
  • screws 36 are used, which are inserted through holes 38 of the base plate 26 and engage corresponding threaded holes 40 formed on one of the guides 20.
  • the screws 36 engage respective T-nuts 41 inserted slidably into a T-slot 43 of one of the guides 20, parallel to the groove 32.
  • the punches 22 are disengaged from the reference formations 34, by moving the head 16.
  • the flat sheets are positioned above the respective forming sections 28 of the dies 24 and, subsequently, the punches 22 are inserted with a vertical downwards movement into the respective forming sections 28.
  • the cooperation between the punches 22 and the forming sections 28 of the dies 24 carries out the formation of the boxes.
  • the machine 10 can be provided with glue nozzles 42 for applying glue onto the flat sheets before they are positioned on the forming sections 28 of the dies 24.
  • glue nozzles 42 for applying glue onto the flat sheets before they are positioned on the forming sections 28 of the dies 24.
  • the base plate 26 of each die 24 may be provided with at least one second reference formation 44 for positioning the respective glue nozzles 42.
  • the glue nozzles 42 are provided with respective clamps 46 which engage a bar 48 parallel to the direction X.
  • the glue nozzles 46 have respective reference portions 50 which engage respective second reference formations 44 of the base plate 36.
  • the glue nozzles 42 are movable along the bar 48 to adjust the position of the glue nozzle 42 relative to the dies 24 in the direction X.
  • the second reference formations 44 of the base plates 26 are C-shaped cuts, and the reference portions 50 of the glue nozzles 42 have the shape of pins with a quadrangular cross-section that engage the cuts 44.
  • the second reference formations 34 could, however, be produced in any other way suitable to establish the positioning of the glue nozzles 42 with respect to the base plate 26.
  • the bar 48 is rotatable relative to its longitudinal axis between a disengaged position ( Figure 3 ) and a working position ( Figure 4 ).
  • the glue nozzles 42 can be moved along the axis of the bar 48 to align the reference portions 50 of the glue nozzles 42 with their second reference formations 44 of the dies 24.
  • the bar 48 is rotated into the working position, in which the reference portions 50 of the glue nozzles 42 engage the respective second reference formations 44 and ensure the glue nozzles 42 are correctly positioned with respect to the dies 24.
  • the clamps 46 of the glue nozzles 42 may be opened to allow a movement in the vertical direction of the glue nozzles 42 with respect to the bar 48.
  • the clamps 46 are closed after having positioned the reference portions 50 of the glue nozzles 42 into engagement with the respective second reference formations 44.
  • the change of shape in a machine according to the present invention excludes the possibility that operators commit positioning errors of the dies and, if provided, the glue nozzles.
  • This shape-change system determines the alignment of the punches 22 and of the dies 24, in a systematic manner, even in the presence of any clearances or tolerances of the robot head, because it uses the position of the punches already assembled on the head 16 as a reference position for assembling the dies 24.
  • the same dies 24 are used, so that the precise positioning of the dies 24 is ensured, in cascade, with respect to the punches 22 and to the glue nozzles 42 with respect to the dies 24.

Landscapes

  • Making Paper Articles (AREA)
  • Coating Apparatus (AREA)
  • Toys (AREA)
  • Instructional Devices (AREA)

Claims (7)

  1. Machine de formation de boîtes comprenant :
    - un cadre fixe (18) portant au moins une matrice interchangeable (24) ayant une section de formation (28), et
    - un manipulateur (12) ayant une tête mobile (16) portant au moins un poinçon interchangeable (22) coopérant avec la section de formation (28) de la matrice respective (24), où le cadre fixe (18) comprend une paire de guides parallèles (20) s'étendant selon une première direction horizontale (X), où ladite section de formation (28) de ladite matrice (24) est fixée à une plaque de base (26) ayant une paire d'éléments de positionnement (30) qui viennent en prise avec lesdits guides (20) de manière à positionner avec précision la matrice (24) par rapport au cadre fixe (18) selon une deuxième direction horizontale (Y) orthogonale à ladite première direction horizontale (X), et où la plaque de base (26) de ladite matrice (24) a une première formation de référence (34) configurée pour venir en prise avec le poinçon respectif (22) afin de positionner avec précision la matrice (24) par rapport au cadre fixe (18) selon ladite première direction horizontale (X).
  2. Machine selon la revendication 1, dans laquelle ladite formation de référence (34) a la forme d'une coupe ayant deux bords parallèles orthogonaux à ladite première direction horizontale (X).
  3. Machine selon la revendication 1, dans laquelle chaque matrice (24) est fixée au cadre (18) dans la position définie par une vis (36) qui traverse un trou (38) de ladite plaque de base (26) et vient en prise avec un trou taraudé (40) formé sur l'un desdits guides (20).
  4. Machine selon la revendication 1, dans laquelle chaque matrice (24) est fixée au cadre (18) dans la position définie par une vis (36) qui traverse un trou (38) de ladite plaque de base (26) et vient en prise avec un écrou en T (41) coulissant dans une rainure en T (43) formée sur l'un desdits guides (20).
  5. Machine selon la revendication 1, comprenant au moins une buse de colle (42) mobile le long d'une barre (48) parallèle à ladite première direction horizontale (X) et ayant une partie de référence (50) qui vient en prise avec une deuxième formation de référence (44) de ladite plaque de base (26).
  6. Machine selon la revendication 5, dans laquelle ladite barre (48) portant ladite au moins une buse de colle (42) oscille autour de son axe longitudinal entre une position de libération et une position de travail.
  7. Machine selon la revendication 5, dans laquelle ladite au moins une buse de colle (42) est reliée à la barre respective (48) au moyen d'un collier de serrage ouvrant (46) qui, en position ouverte, permet un déplacement vertical de la buse de colle (42).
EP17174422.0A 2016-06-13 2017-06-05 Machine de formation de boîtes Not-in-force EP3263324B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITUA2016A004310A ITUA20164310A1 (it) 2016-06-13 2016-06-13 "macchina per la formazione di scatole"

Publications (2)

Publication Number Publication Date
EP3263324A1 EP3263324A1 (fr) 2018-01-03
EP3263324B1 true EP3263324B1 (fr) 2019-04-10

Family

ID=57209691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP17174422.0A Not-in-force EP3263324B1 (fr) 2016-06-13 2017-06-05 Machine de formation de boîtes

Country Status (2)

Country Link
EP (1) EP3263324B1 (fr)
IT (1) ITUA20164310A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10913231B2 (en) 2018-10-10 2021-02-09 International Paper Company Machine for forming containers

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB309496A (en) * 1928-04-11 1930-05-22 Schmidt Karl Method of and means for producing deep cases or containers of cardboard and like material
DE830626C (de) * 1948-10-02 1952-02-07 Farbwerke Hoechst Vormals Meis Verfahren und Vorrichtungen zum Verpacken von kleinen Gegenstaenden
JPS5163782A (fr) * 1974-10-11 1976-06-02 Boootaa Patsukeejingu Ltd
NL2006233C2 (nl) * 2011-02-17 2012-08-20 Schut Systems B V Omvorminrichting en werkwijze voor omvormen.

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
US10913231B2 (en) 2018-10-10 2021-02-09 International Paper Company Machine for forming containers

Also Published As

Publication number Publication date
EP3263324A1 (fr) 2018-01-03
ITUA20164310A1 (it) 2017-12-13

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