EP3083420A1 - Corps de canette - Google Patents

Corps de canette

Info

Publication number
EP3083420A1
EP3083420A1 EP14783866.8A EP14783866A EP3083420A1 EP 3083420 A1 EP3083420 A1 EP 3083420A1 EP 14783866 A EP14783866 A EP 14783866A EP 3083420 A1 EP3083420 A1 EP 3083420A1
Authority
EP
European Patent Office
Prior art keywords
radius
body according
inwardly curved
central portion
stand
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.)
Withdrawn
Application number
EP14783866.8A
Other languages
German (de)
English (en)
Inventor
Ralf WERSUHN
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.)
Ardagh Metal Beverage Europe GmbH
Original Assignee
Ball Europe GmbH
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
Priority claimed from DE102013226032.6A external-priority patent/DE102013226032A1/de
Application filed by Ball Europe GmbH filed Critical Ball Europe GmbH
Publication of EP3083420A1 publication Critical patent/EP3083420A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/12—Cans, casks, barrels, or drums
    • B65D1/14—Cans, casks, barrels, or drums characterised by shape
    • B65D1/16—Cans, casks, barrels, or drums characterised by shape of curved cross-section, e.g. cylindrical
    • B65D1/165—Cylindrical cans
    • 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
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
    • B65D1/0261—Bottom construction
    • 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
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/22—Boxes or like containers with side walls of substantial depth for enclosing contents
    • B65D1/26—Thin-walled containers, e.g. formed by deep-drawing operations

Definitions

  • the invention relates to a can body, in particular for beverage cans.
  • two-piece beverage cans which consist of a can body and a lid, can body and lid are typically sealed together by a double fold.
  • the lid itself can in turn be multi-part and typically has at least one grip tab or a resealable closure.
  • the can body itself is in one piece and formed from an originally flat sheet metal.
  • the methods and tools for forming a can body from sheet metal by means of stretch forming are known in principle. It is also known that typical can bodies for beverage cans have an inwardly curved bottom to impart pressure resistance to the bottom. In the area of the (before filling) open end of the can body, the can body is typically provided with a tapered "neck", so slightly retracted.
  • the goal in the construction of a can body is typically to achieve a sufficiently high strength with as little material and manufacturing costs as possible. This object is also based on the present invention.
  • a can body for a beverage can, wherein the can body is integrally formed from aluminum sheet and has a peripheral wall and a can bottom, which has a dome-like inwardly curved central portion and a central portion surrounding the ring and arched outward stand section.
  • the outwardly curved stand portion is connected via a cross-sectionally inclined outer transition portion with the peripheral wall and defines a stand ring along which the stand portion at least approximately contacts a flat surface when the can body is placed on such a flat surface.
  • the diameter of the inwardly curved central section is more than 36mm.
  • the can body has a diameter of less than 60 mm and preferably less than 56 mm and the largest sheet thickness of the formed aluminum sheet in the region of the dome-like inwardly curved central portion is less than 0.25 mm.
  • the inwardly curved central portion is viewed from the outside completely concave and forms a dome, which extends up to the stand section.
  • the outer diameter of the inwardly curved central portion is therefore only slightly, in particular less than 10% smaller than the diameter of the stand section, ie, the continuously inwardly curved central section closes almost directly to the stand section.
  • the diameter of the inwardly curved central portion is typically greater than 36mm and typically greater than 40mm.
  • the terms “inward” and “outward” are in the context of this text on the interior of the can body and not on a longitudinal axis of the can body, so that an inwardly directed curvature viewed from the outside is a concave curvature and an outward-facing curvature is a convex curvature viewed from the outside.
  • the aluminum sheet, from which the can body is formed in the planar state before forming the can body, a sheet thickness of less than 0.25 mm. This has the consequence that the sheet thickness of the finished molded can body at any point within the stand ring is greater than 0.25 mm, because the sheet during Forms of the can body stretched and thus becomes thinner.
  • the inwardly curved central portion of the can body is defined by at least one central radius of curvature R1_a and a peripherally adjoining peripheral radius of curvature R1_b, of which the central radius of curvature R1_a is between 39 mm and 45 mm and the peripheral radius of curvature R1_b between 25 mm and 35 mm. In this way, the dome-like inwardly curved central portion receives despite sufficient thickness sheet metal sufficient strength.
  • the stand section together with the curved central section defines a floor depth as the greatest distance of the curved central section from a plane defined by the stand ring, which is between 9.5 mm and 1 1 mm.
  • the dome-like inwardly curved central portion has its greatest distance from a plane defined by the standard ring level usually its center, so that the bottom depth can be determined in the middle of the dome-like inwardly curved central portion.
  • the can body is reformed in the region of the bottom after stretching in a conventional manner.
  • a further deformation takes place, in particular of the stand section, to the final geometry of the can body.
  • an inwardly curved transition radius R2 in which the curved central portion merges into the standing portion, a measure between 1, 5 mm and 1, 9 mm before the reforming. This measure is defined during stretch drawing by the tools used. Particularly preferred is a measure of the transition radius of approximately 1.7 mm.
  • the stand section adjacent to the base ring (as the lowest point in the upright box (when looking at the cross section - in fact it is a circle) of the stand section) at least before reforming identical and without radius change into one another Vault radii R3_a and R3 b has.
  • the stand section in the outer transition section merges with an inwardly curved radius R4 and a subsequent outwardly curved radius R5 in the peripheral wall, wherein the inwardly curved radius R4 before the Refor - is between 2.7 mm and 3, 1 mm (preferably of the order of 2.9 mm) and the outwardly curved radius R5 before reforming between 3.0 mm and 3.5 mm, ie for example between 3 , 2 mm and 3.3 mm.
  • the stand ring has a diameter between 43 mm and 46.5 mm.
  • a can body is preferred whose bottom is reformed in a conventional manner with a reforming tool in the region of the transition from the standing portion to the inwardly curved central portion, so that as a result an inwardly curved inner transition portion having a diameter between 43 mm and 45 mm and a radius of curvature which is between 0.8 mm and 1, 2 mm.
  • an inner peripheral wall of the stand section is machined with a disc-shaped tool, which rolls on the inner peripheral wall and in this way produces a circumferential, open to a central longitudinal axis of the can body deepening in profile a rounding with a radius of about 1 mm has, according to a cross-sectional radius at the periphery of the disk-shaped tool for reforming.
  • the reforming is preferably carried out with a tool whose smallest radius engaged with the can body to be reformed is between 0.8 mm and 1.2 mm, e.g. the aforementioned 1 mm.
  • the largest sheet thickness of the formed aluminum sheet in a central portion of the peripheral wall (for example, halfway up the can body), it is preferable that this largest sheet thickness is smaller than 0.1 mm, and preferably smaller than 0.09 mm.
  • the peripheral wall of the can body is preferably nearly cylinder-jacket-shaped and preferably includes a diameter of less than 55 mm and preferably at least approximately 53 mm.
  • the can body is preferably so measure that it has a filling volume between 150 ml and 250 ml and accordingly preferably has a height between 85 mm and 140 mm.
  • Figure 1 a side view of a can body with a filling volume of
  • Figure 2 a side view of a can body with a filling volume of
  • FIG. 3 shows a side view of a can body with a filling volume of 150 ml and a bottom geometry according to the invention
  • FIG. 4 shows a bottom geometry according to the invention before reforming in detail
  • FIG. 5 shows a bottom geometry according to the invention after reforming.
  • a can body 10 has a substantially cylindrical jacket-shaped circumferential wall 12 and a bottom 14 with an inwardly curved central section 16 and a standing section 18 surrounding it and connected to the peripheral wall.
  • the standing section 18 is of a cross-section obliquely extending transition portion 24 connected to the peripheral wall 12.
  • the stand section 18 has an inner circumferential wall 26 pointing in the direction of the central longitudinal axis Z.
  • the stand portion touches a flat surface, if the can body 10 is placed upright on such an area. These lowest points are part of a circular base ring, along which the stand section touches the flat surface.
  • the can body 10 In the region of its upper open end 20, the can body 10 has a short tapered section 22. Shown are the height H and the diameter D of the can body and indicated is a central longitudinal axis Z. The diameter of the illustrated in Figures 1 to 3 can body is 53 mm.
  • Figure 1 shows the side view of a can body with 250 ml filling volume
  • Figure 2 shows corresponding side view of a can body with 200 ml filling volume
  • Figure 3 shows the side view of a can body with 150 ml filling volume.
  • the height H depends on the filling volume and is for the can body with 250 ml filling volume in Figure 1 just under 135 mm, for the can body with 200 ml filling volume in Figure 2 just about 1 1 1 mm and for the can body with 150 ml filling volume in Figure 3 just under 90 mm.
  • Figure 4 shows the geometry of the can bottom before reforming in detail. It can be seen that the stand ring defined by the illustrated geometry has a diameter of slightly more than 46 mm before reforming.
  • the dome-like inwardly curved central portion 16 has a central radius of curvature R1_a, which is preferably between 39 mm and 45 mm, that is, for example, 42 mm. This radius of curvature merges into a peripheral radius of curvature R1_b, which is preferably between 25 mm and 35 mm, for example 30 mm.
  • R1_a central radius of curvature
  • R1_b peripheral radius of curvature
  • the stand portion 18 connects.
  • a transition radius between the inwardly curved central portion 16 and the stand portion 18 is preferably before seeing between 1, 5 mm and 1, 9 mm, ie, for example, 1, 7 mm.
  • the stand portion 18 is defined by an outwardly curved portion in the vicinity of the base ring, wherein the outwardly directed Völbungsradien adjacent to the base ring before reforming in each case between 1, 3 mm and 1, 5 mm, for example, 1, 4 mm ,
  • These bulges around the base ring go into a concave curvature viewed from the outside in the region of the inclined outer transition section between stand section 18 and peripheral wall 12, said concave curvature considered from the outside preferably having a radius between 2.8 mm and 3 mm, ie, for example 2.9 mm has.
  • the obliquely extending outer transition section merges into an outer convex radius of 3.0 mm to 3.4 mm into the circumferential wall 12.
  • the largest thickness of the inwardly curved central portion of the bottom has approximately where a mark "thickness" is drawn in Figure 4.
  • the inwardly curved central portion of the bottom has in some a sheet thickness, the sheet thickness of the sheet before Deformation corresponds to the can body, so less than 0.25 mm.
  • the can body is made of an originally flat aluminum sheet having an original sheet thickness of 0.24 mm, the thickness shown in FIG. 4 in the region of the inwardly curved central portion of the bottom is, for example, also approximately 0.24 mm.
  • the peripheral wall 12 after forming has a sheet thickness of about 0.09 mm.
  • Figure 5 finally shows the final geometry of the soil after reforming. It can be seen that the depth of the ground has been reduced by the reforming of initially slightly more than 10 mm (cf. FIG. 4, the measure DD_FE) exclusively slightly less than 10 mm, namely for example 9.7 mm; see FIG. 5, the dimension DD_BE.
  • the reforming takes place with a disk-shaped tool with a smallest, with the can body engaged radius of about 1 mm. During reforming, the center of this radius is approximately at a distance of 2 mm to 3 mm from a plane defined by the foot ring.
  • the disk-shaped tool rolls on the inner peripheral wall of the stand section and thus produces a circumferential recess open towards the central longitudinal axis of the can body, which has a profile with a radius of approximately 1 mm in profile, corresponding to a cross-sectional radius on the circumference the disc-shaped tool for reforming.
  • the depression produced by the reforming tool and open towards the central longitudinal axis of the can body has a diameter (reforming dia) between 44 mm and 45 mm.
  • the material of the can body is in the exemplary embodiment aluminum alloy 3104 with a hardness of H 19 and a nominal plate thickness of 0.245 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Stackable Containers (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)

Abstract

L'invention concerne un corps (10), destiné à une canette, qui est formé d'un seul tenant en tôle d'aluminium et qui comporte une paroi périphérique (12) ainsi qu'un fond de canette (14), qui possède un segment central (16) bombé vers l'intérieur en forme de calotte ainsi qu'un segment de support (18) bombé vers l'extérieur et entourant en forme de bague le segment central. Le segment central bombé vers l'extérieur est relié à la paroi périphérique par l'intermédiaire d'un segment de jonction extérieur incliné en coupe transversale et il définit une bague support le long de laquelle le segment de support vient au moins approximativement au contact d'une surface plane lorsque le corps de canette est posé sur une telle surface plane. Selon l'invention, le corps de canette possède un diamètre inférieur à 56 mm et la plus grande épaisseur de la tôle d'aluminium formée au niveau du segment central bombé vers l'intérieur en forme de calotte est inférieure à 0,25 mm.
EP14783866.8A 2013-12-16 2014-10-14 Corps de canette Withdrawn EP3083420A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102013226032.6A DE102013226032A1 (de) 2013-12-16 2013-12-16 Dosenkörper
DE102014213558 2014-07-11
PCT/EP2014/071946 WO2015090669A1 (fr) 2013-12-16 2014-10-14 Corps de canette

Publications (1)

Publication Number Publication Date
EP3083420A1 true EP3083420A1 (fr) 2016-10-26

Family

ID=51691062

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14783866.8A Withdrawn EP3083420A1 (fr) 2013-12-16 2014-10-14 Corps de canette

Country Status (6)

Country Link
US (1) US20160318645A1 (fr)
EP (1) EP3083420A1 (fr)
CN (1) CN105899433A (fr)
CA (1) CA2933754A1 (fr)
MX (1) MX2016007739A (fr)
WO (1) WO2015090669A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7447564B2 (ja) * 2020-03-09 2024-03-12 東洋製罐グループホールディングス株式会社 シームレス缶体及びシームレス缶体の製造方法
JPWO2021186829A1 (fr) * 2020-03-18 2021-09-23
JP2022046225A (ja) * 2020-09-10 2022-03-23 東洋製罐株式会社 プリフォーム缶及びその製造方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3693828A (en) * 1970-07-22 1972-09-26 Crown Cork & Seal Co Seamless steel containers
US3904069A (en) * 1972-01-31 1975-09-09 American Can Co Container
US4685322A (en) * 1985-09-03 1987-08-11 Aluminum Company Of America Method of forming a drawn and redrawn container body
US4834256A (en) * 1987-07-31 1989-05-30 Pac International, Inc. Can with domed bottom structure
JPH0675737B2 (ja) * 1989-06-27 1994-09-28 東洋製罐株式会社 ツーピース缶用缶胴の成形法
DE3930937A1 (de) * 1989-09-15 1991-03-28 Schmalbach Lubeca Zweiteilige getraenkedose aus metall
CA2038817C (fr) * 1990-04-06 1997-04-22 Gary Arthur Baldwin Contenant a boisson, a resistance anti-gouttes amelioree
US5394727A (en) * 1993-08-18 1995-03-07 Aluminum Company Of America Method of forming a metal container body
AU4329199A (en) * 1998-06-03 1999-12-20 Crown Cork & Seal Technologies Corporation Can bottom having improved strength and apparatus for making same
US7472800B2 (en) * 2004-03-05 2009-01-06 Rexam Beverage Can Company Bottom profile for drawn and ironed can body
EP1927554A1 (fr) * 2006-11-29 2008-06-04 Impress Group B.V. Boîte sous pression, tel qu'un flacon aérosol

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2015090669A1 *

Also Published As

Publication number Publication date
CA2933754A1 (fr) 2015-06-25
WO2015090669A1 (fr) 2015-06-25
US20160318645A1 (en) 2016-11-03
CN105899433A (zh) 2016-08-24
MX2016007739A (es) 2017-02-13

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