EP1825936A2 - Appareil de fabrication d'une boîte de conserve métallique et procédé de fabrication de cette boîte de conserve - Google Patents

Appareil de fabrication d'une boîte de conserve métallique et procédé de fabrication de cette boîte de conserve Download PDF

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Publication number
EP1825936A2
EP1825936A2 EP07102852A EP07102852A EP1825936A2 EP 1825936 A2 EP1825936 A2 EP 1825936A2 EP 07102852 A EP07102852 A EP 07102852A EP 07102852 A EP07102852 A EP 07102852A EP 1825936 A2 EP1825936 A2 EP 1825936A2
Authority
EP
European Patent Office
Prior art keywords
shell
lid
correspondence
welding
coupling
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.)
Granted
Application number
EP07102852A
Other languages
German (de)
English (en)
Other versions
EP1825936A3 (fr
EP1825936B1 (fr
Inventor
Davide Spotti
Alessandro Coppola
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.)
Illycaffe SpA
Original Assignee
Illycaffe 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 Illycaffe SpA filed Critical Illycaffe SpA
Publication of EP1825936A2 publication Critical patent/EP1825936A2/fr
Publication of EP1825936A3 publication Critical patent/EP1825936A3/fr
Application granted granted Critical
Publication of EP1825936B1 publication Critical patent/EP1825936B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/2653—Methods or machines for closing cans by applying caps or bottoms
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D7/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal
    • B65D7/12—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls
    • B65D7/34—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls with permanent connections between walls
    • B65D7/38—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls with permanent connections between walls formed by soldering, welding, or otherwise uniting opposed surfaces

Definitions

  • the present invention concerns an apparatus and a method for making a metal tin, advantageously of the pressurized type, for containing coffee grains.
  • Pressurized metal tins used to contain coffee grains comprising a cylindrical shaped shell, or central body, associated at the two ends respectively with a bottom and a lid provided centrally with an opening in turn closed by a removable cap.
  • a non-toxic gas is introduced, whose pressure adds to the pressure of the gasses which are released naturally by the coffee, so that the internal pressure of the tin might reach the value of 5-7 bar if there was not a regulating valve, or safety valve, on the cap, cooperating with a threading made on the lid.
  • the tin is made by preparing the components (shell, or central body, bottom and lid) and then assembling them together.
  • One purpose of the present invention is to achieve an apparatus and a method that allow to produce, in a completely automatic manner and with limited costs, an airtight metal tin whose components are welded together.
  • a further purpose of the invention is to make an airtight metal tin with a surface as regular as possible and without protruding edges.
  • the Applicant has devised and embodied the present invention to overcome the shortcomings of the state of the art in order to achieve these purposes and obtain other advantages.
  • the apparatus according to the present invention also comprises calender means, able to shape a substantially flat metal sheet into a tubular shape, and welding means able to weld said metal sheet along two longitudinal sides coupled with respect to one another, so as to determine the shaping of the shell.
  • the apparatus according to the invention also comprises edging means able to determine a variation of the section, that is, a narrowing or a widening, of the shell so as to define the joining zones in correspondence with which the lid and the bottom have to be coupled.
  • At least a part of the welding means is of the type with rollers.
  • At least a part of the welding means is able to weld with the addition of weld material.
  • the coupling means cooperate with a centering device able to keep the shell in the desired shape and position during coupling with the lid and/or the bottom.
  • the pressure means is formed by knurling rollers able to achieve, along the joining zones, a groove whose section narrows towards the inside, for example substantially semicircular, and defining the interpenetration of the lid with the shell and the shell with the bottom.
  • Fig. 1 schematically shows an apparatus according to the present invention, by means of which it is possible to make, in a completely automatic manner, a circular based metal tin 11 (fig. 2g) that contains about 3 kg of coffee grains.
  • the apparatus 10 is able to make a metal tin 11 by assembling a lid 13, for example of the type made according to the patent application filed concomitantly by the Applicant, and a concave bottom 14 made with a metal sheet with a thickness of between 0.2 mm and 0.4 mm, advantageously about 0.3 mm, to the two ends of a cylindrical shaped shell, or central body, 12.
  • the apparatus 10 comprises, in order: a station 15 for shaping the shell 12, a first edging station 16, a second edging station 17, a coupling station 18 for shell 12 and lid 13, a station 19 for knurling the shell 12 and the lid 13, a first station 20 for welding the shell 12 to the lid 13, a station 21 for coupling and knurling the shell 12 and the bottom 14 and a second station 22 for welding the shell 12 to the bottom 14.
  • All the stations are connected to each other by transfer devices such as conveyor belts, chain conveyors, suction belts or similar.
  • the shaping station 15 integrally comprises a calendering device, able to give a cylindrical form to a substantially plane metal sheet 23 (fig. 2a), and a welding device able to weld the longitudinal edges of said metal sheet 23 so that it maintains the cylindrical form and thus forms the shell 12.
  • the welding device can be of the type able to achieve a welding with addition of weld material or without addition of weld material, as will be explained hereafter.
  • the first edging station 16 comprises a support 24, on which the shell 12 is made to rotate, and a shaping roller 25 able to act, in cooperation with a mating contrasting element 26, on the external surface of the shell 12 in correspondence with the coupling edge of the lid 13, so as to achieve a slight annular narrow part 27 (fig. 1b).
  • the second edging station 27 (fig. 1c) comprises a relative support for the rotation of the shell 12 and a shaping roller 28 able to act, in cooperation with a mating contrasting element 29, on the internal surface of the shell 12 in correspondence with the coupling edge of the bottom 14, in order to achieve a slight annular widening 30.
  • the coupling station 18 (fig. 1d) comprises a mobile support 31 able to hold, in correspondence with the coupling edge of the bottom 14, and to axially translate the shell 12; a centering device 32 able to maintain the shell 12 in its exact cylindrical shape; and a mobile support 33 able to be fed with a lid 13 at a time, so as to translate it axially in order to couple it to the shell 12.
  • the centering device 32 comprises a plurality of jaws able to selectively close on the shell 12, so as to define a circular template which keeps it in its exact cylindrical shape, preventing possible deformations, and in a central position with respect to the lid 13 to which it is to be coupled.
  • the knurling station 19 (fig. le) comprises a support 34, on which the shell 12 and the lid 13, coupled to each other, are made to rotate, a holding device 35, axially mobile, able to hold the lid 13, and a pair of knurling rollers, respectively external 36 and internal 37.
  • the external knurling roller 36 has a relief 36a on its circumference, in this case with a semi-circular section (figs. 11 and 12), while the internal knurling roller 37, able to be disposed inside the shell 12, has a groove mating in section with said relief 36a (figs. 13 and 14).
  • the external knurling roller 36 is able to put pressure in correspondence with the annular narrow part 27 in order to achieve, in cooperation with the internal knurling roller 37, a circumferential groove 38 which determines an interpenetration 138 of the lid 13 in the shell 12 (fig. 15b).
  • the first welding station 20 comprises a support 39 and a holding device 40, analogous to those of the knurling station 19, and a welding device 41 with rollers comprising an external welding roller, or electrode, 42 and an internal welding roller, or electrode, 43 able to come into contact with the lid 13 and the shell 12 respectively, in order to achieve a continuous welding in correspondence with the circumferential groove 38, that is, of the interpenetration 138 (figs. 1f and 15c).
  • the coupling and knurling station 21 (figs. 1g and 1h) comprises a transfer arm 44 able to take one bottom 14 at a time and bring it in correspondence with a support 45 able to make it rotate, a holding device 48 able to hold the lid 13 and translate it axially, together with the shell 12, so as to couple it with the bottom 14, and a pair of knurling rollers, respectively external 46 and internal 47 (fig. 16b) which, in this case, have the same shape as the knurling rollers 36, 37 of the knurling station 19.
  • the external knurling roller 46 is able to exert pressure in correspondence with the annular widening 30 in order to achieve, in cooperation with the internal knurling roller 47, disposed inside the shell 12, a circumferential groove 49 that determines an interpenetration 149 of the shell 12 on the bottom 14.
  • the second welding station 22 comprises a support 54, a holding device 50, and a welding device with rollers 51, comprising an external welding roller, or electrode, 52 and an internal welding roller, or electrode, 53, analogous to those of the first welding station 20; the two welding rollers 52 and 53 are able to come into contact with the shell 12 and the bottom 14 respectively, so as to achieve a continuous welding in correspondence with the interpenetration 49 (figs. 1i and 16c).
  • the method for making the tin 11 by means of the apparatus 10 is as follows (fig. 2).
  • such welding can be achieved with a very low addition of weld material (figs. 3 and 4), or without adding any weld material, by overlapping the longitudinal edges (figs. 5-10).
  • a small lip (55) is created on one of said edges which, when the metal sheet 23 is curved, moves to a position inside (fig. 6) or outside (fig. 7) the shell 12.
  • two lips 55 are created, of a lower height, on the two edges to overlap, which are disposed one inside and one outside the cylinder that defines the shell 12.
  • the shell 12 thus achieved which in this case has a diameter comprised between 210 mm and 230 mm, advantageously 220 mm, is transferred to the first edging station 16, where it is made to rotate on the support 24, while the shaping roller 25, in cooperation with the contrasting element 26, determines the formation of the annular narrow part 27 for the subsequent coupling of the lid 13 (fig. 1b).
  • the shell 12 is then transferred to the second edging station 17, where the shaping roller 28, in cooperation with the contrasting element 29, determines the formation of the annular widening 30 for the subsequent coupling of the bottom 14 (fig. 1c).
  • the shell 12 is then transferred to the coupling station 18, where the mobile support 31 pushes it towards the centering device 32 whose jaws are open; these jaws then close in order to maintain the shell 12 in a perfectly cylindrical shape and in a centered position with respect to the mobile support 32, which in the meantime is fed with a lid 13.
  • the subsequent drive of the mobile support 32 takes the lid 13 to overlap over the annular narrow part 27, determining the coupling by interference of the lid 13 and the shell 12 (figs. 1d and 15a).
  • the shell 12 and the lid 13 thus coupled are transferred to the knurling station 19 where the holding device 35 holds them in contact with the support 34, bringing the internal knurling roller 37 into the shell 12; in this condition, while the shell 12 and the lid 13 rotate, the knurling rollers 36 and 37 achieve the circumferential groove 38 that defines the interpenetration 138 in correspondence with the annular narrow part 27 (figs. 15b and 15c).
  • the semicircular section, converging towards the inside, of the circumferential groove 38 promotes the hold of the coupling between the shell 12 and the lid 13, substantially preventing the reciprocal longitudinal sliding thereof.
  • the circumferential groove 38 has a diameter "D" comprised between about 2 mm and 4 mm, advantageously about 3.5 mm, and a depth "P" comprised therefore between about 1 mm and 2 mm, advantageously about 1.8 mm.
  • the shell 12 and the lid 13 are then transferred to the first welding station 20, where the holding device 40 pushes them into contact with the support 39, making the internal welding roller 43 enter the shell 12, in contrast with the external welding roller 42, disposed inside the circumferential groove 38 (figs. 1f and 15c); the shell 12 and the lid 13 are then made to rotate on the support 39 and the welding rollers 42 and 43 are activated in order to perform the continuous welding along the circumferential groove 38.
  • the association between the shell 12 and the lid 13 is achieved along the edge of the latter with a slight addition of material.
  • the shell 12 and the lid 13 are taken to the coupling and knurling station 21 where, by means of the holding device 48, they are kept at a distance from the support 45 while the transfer arm 44 disposes a bottom 14 in correspondence with the support 45 (fig. 1g) so that the internal knurling roller 47 is positioned inside it.
  • the holding device 48 is then made to advance axially towards the support 45, so that the bottom 14 penetrates the annular widening 30, determining the coupling through interference between the bottom 14 and the shell 12 (fig. 16a).
  • the interpenetration 149 defined by the circumferential groove 49, improves the coupling conditions due to interference between the shell 12 and the bottom 14, substantially preventing reciprocal longitudinal sliding.
  • the shell 12 and the bottom 14 are then taken to the second welding station 22, where they are welded together, by means of welding rollers 52 and 53, in correspondence with the circumferential groove 49, in a manner analogous to that of the first welding station 20.
  • the welding of the shell 12 and the bottom 14 is performed in correspondence with their edges, with a slight addition of material.
  • the welding stations 20 and 22 may provide other welding members instead of the rollers 42, 43, 52 and 53.
  • the apparatus 10 may also not have the second edging station 30, if the bottom 14 has a diameter smaller than the shell 12, so that it can be inserted into it without needing to make the annular widening 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Pressure Vessels And Lids Thereof (AREA)
  • Chemically Coating (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Coating With Molten Metal (AREA)
EP07102852.6A 2006-02-27 2007-02-22 Appareil de fabrication d'une boîte de conserve métallique et procédé de fabrication de cette boîte de conserve Not-in-force EP1825936B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITUD20060042 ITUD20060042A1 (it) 2006-02-27 2006-02-27 Apparecchiatura per la realizzazione di un barattolo metallico e procedimento per la realizzazione di tale barattolo

Publications (3)

Publication Number Publication Date
EP1825936A2 true EP1825936A2 (fr) 2007-08-29
EP1825936A3 EP1825936A3 (fr) 2008-11-19
EP1825936B1 EP1825936B1 (fr) 2016-04-27

Family

ID=38066595

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07102852.6A Not-in-force EP1825936B1 (fr) 2006-02-27 2007-02-22 Appareil de fabrication d'une boîte de conserve métallique et procédé de fabrication de cette boîte de conserve

Country Status (2)

Country Link
EP (1) EP1825936B1 (fr)
IT (1) ITUD20060042A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010017611A1 (fr) * 2008-08-14 2010-02-18 Brasilata S.A. Embalagens Metálicas Agencement de fermeture pour un récipient en feuille de métal
CN102126081A (zh) * 2009-12-25 2011-07-20 芝浦机械电子株式会社 封罐装置

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63194885A (ja) * 1987-02-09 1988-08-12 Toyo Seikan Kaisha Ltd レ−ザ溶接された缶詰缶及びその製造方法
FR2705256A1 (fr) * 1993-05-21 1994-11-25 Lorraine Laminage Récipient métallique du type boîte de conserve, boîte à ouverture facile ou boîte boisson et procédé de fabrication d'un tel récipient.
DE20021192U1 (de) * 2000-12-14 2001-05-31 Forschungs- und Qualitätszentrum Oderbrücke gGmbH, 15890 Eisenhüttenstadt Gefahrgutfass

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS63194885A (ja) * 1987-02-09 1988-08-12 Toyo Seikan Kaisha Ltd レ−ザ溶接された缶詰缶及びその製造方法
FR2705256A1 (fr) * 1993-05-21 1994-11-25 Lorraine Laminage Récipient métallique du type boîte de conserve, boîte à ouverture facile ou boîte boisson et procédé de fabrication d'un tel récipient.
DE20021192U1 (de) * 2000-12-14 2001-05-31 Forschungs- und Qualitätszentrum Oderbrücke gGmbH, 15890 Eisenhüttenstadt Gefahrgutfass

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010017611A1 (fr) * 2008-08-14 2010-02-18 Brasilata S.A. Embalagens Metálicas Agencement de fermeture pour un récipient en feuille de métal
US8573439B2 (en) 2008-08-14 2013-11-05 Brasilata S.A. Embalagens Metalicas Sheet metal container with hermetically affixed end walls
CN102126081A (zh) * 2009-12-25 2011-07-20 芝浦机械电子株式会社 封罐装置
CN102126081B (zh) * 2009-12-25 2015-02-11 芝浦机械电子株式会社 封罐装置

Also Published As

Publication number Publication date
EP1825936A3 (fr) 2008-11-19
EP1825936B1 (fr) 2016-04-27
ITUD20060042A1 (it) 2007-08-28

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