EP1812184A2 - Corps de boîte en metal - Google Patents

Corps de boîte en metal

Info

Publication number
EP1812184A2
EP1812184A2 EP05797351A EP05797351A EP1812184A2 EP 1812184 A2 EP1812184 A2 EP 1812184A2 EP 05797351 A EP05797351 A EP 05797351A EP 05797351 A EP05797351 A EP 05797351A EP 1812184 A2 EP1812184 A2 EP 1812184A2
Authority
EP
European Patent Office
Prior art keywords
wall
beads
thickness
annular portion
wall thickness
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Withdrawn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
EP05797351A
Other languages
German (de)
English (en)
Inventor
Frederik Jonker
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.)
Tata Steel Ijmuiden BV
Original Assignee
Corus Staal BV
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 Corus Staal BV filed Critical Corus Staal BV
Priority to EP05797351A priority Critical patent/EP1812184A2/fr
Publication of EP1812184A2 publication Critical patent/EP1812184A2/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Withdrawn legal-status Critical Current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
    • B65D1/40—Details of walls
    • B65D1/42—Reinforcing or strengthening parts or members

Definitions

  • the invention relates to a can body comprising a beaded, essentially round cylindrical circumferential metal wall.
  • a can body is known from e.g. EP0780314 disclosing a can-wall with beads wherein various parameters defining the bead geometry are disclosed.
  • EP0780314 it is proposed to vary the bead length depending on local susceptibility to collapsing.
  • Axial load is to be understood as a load on the can wall caused by forcing the top towards the bottom of the can.
  • Panelling is to be understood as a phenomenon caused by forces acting on the can wall where the forces are essentially not parallel to the wall, such as forces exerted on the can wall if the assembled en closed can is put in a pressurised vessel.
  • the wall comprises purposively selected thick and thin walled annular sections and the wall is at least partly provided with beads.
  • a can body comprises a thicker annular wall portion in combination with beads according to a suitable beading profile, technically feasible and improved combinations of axial and panelling strength as required in certain packaging cans such as food cans, e.g. made by drawing and wall ironing (DWI), can be achieved, and consequently better can performance and new down- gauging possibilities come into reach.
  • DWI drawing and wall ironing
  • the beads may be horizontal beads, i.e. beads that form an "endless groove", the extreme of the "valley” lying in a plane perpendicular to the centre line of the can body, one or more spiral beads, or vertical beads.
  • the can body according to the invention is one wherein the metal can wall is wall ironed, such as in a DWI can.
  • the metal can wall is wall ironed, such as in a DWI can.
  • the can body is provided with at least an annular portion of a relatively small wall thickness provided with relatively shallow beads and an annular portion of a relatively large wall thickness provided with relatively deep beads so as to increase the ratio mechanical performance / metal consumption.
  • Mechanical performance should be understood as a combination of both adequate axial load strength and adequate panelling strength meeting the applicable requirements.
  • Metal consumption should be understood as a term that may be expressed in the form of a volume, thickness or weight of the sheet metal used for the making the can body in question and/or of the material forming part of the resulting can body.
  • the annular portion of relatively large wall thickness is positioned in the middle region of the wall.
  • the middle region of the wall will generally be most susceptible to panelling.
  • Providing the annular portion of relatively large wall thickness in the middle region of the wall, enables provision of (heavier) beading to the extent required with a view to optimising axial load strength and panelling strength locally.
  • annular portion of relatively small wall thickness on either side of the annular portion of relatively large wall thickness.
  • the top and bottom region of the wall situated on either side of the middle region are supported by the lid and the bottom of the closed can respectively.
  • the top and bottom region are additionally supported by the annular portion of relatively large wall thickness positioned in the middle region of the wall.
  • Fig. 1 a schematic representation of the wall thickness at various locations of a known can body in unbeaded condition
  • Fig. 2 a schematic representation of the wall thickness at various location of a can body according to the invention in unbeaded condition
  • Fig. 3 a known can bead profile and a can wall thickness profile
  • Fig. 4 a can bead profile and a can wall thickness profile according to the invention.
  • DWI wall ironed
  • All cans were made from T57CA standard tinplate, using conventional can- making processes including drawing and wall ironing (DWI) and beading.
  • DWI drawing and wall ironing
  • the can body according to the invention was drawn and wall ironed according to EP1294622 using a stepped punch to realise a "drawn and wall ironed vary wall thickness can".
  • the wall of the can body was subsequently provided with beads in a standard beading machine.
  • the beading tools were built up using assemblies of individual beading rings, allowing variation of the bead profile and bead groupings.
  • the closed can should be able to withstand a certain prescribed minimum pressure difference over the can wall (external pressure less internal pressure) of e.g. 1.00, as well as axial load strength: the closed can should be able to withstand a minimum axial load as defined hereinabove of e.g. 1500
  • 1 F represents a can body according to the state of the art that is manufactured in an industrial can-making plant
  • 2 G is a copy of F with vary wall thickness, manufactured using lab can-making equipment
  • the thicker annular portion of the wall produced coincided with the middle bead group, the beads running along the can wall being divided into 3 groups located in the top, middle and bottom region of the can wall respectively, see e.g. Fig. 4.
  • Each beading group had a specific bead depth, e.g. for test run B the top and bottom group (6 beads) 0.28 mm and 0.26 mm respectively, and the middle group (7 beads) 0.37 mm, see Fig. 4
  • test run H The axial load and panelling strength properties of the can body manufactured from down gauged packaging steel (test run H), viz. axial load 2.22 kN and panelling strength 1.34 bar, easily meet even the strictest requirements. Results were fully reproducible and consistent throughout the whole production in the trial run. Test runs B, D and E produced satisfactory results and showed that a marked increase in axial and panelling performance is achieved in a vary wall thickness and vary bead depth food can according to the invention.
  • FIG. 1 in particular schematically shows the left half of a known can body in unbeaded condition in longitudinal section.
  • Fig. 2 in particular schematically shows the left half of a can body according to the invention in unbeaded condition in longitudinal section.
  • wavy line black
  • the horizontal axis represents h (in mm) as shown in Fig. 1.
  • the vertical axis represents the local can radius: An area above the wavy line lies outside the can body.
  • Fig. 3 the other line (grey) represents the thickness profile. Again the horizontal axis represents h (in mm) as shown in Fig. 1. Here, the vertical axis (dimension and scale not shown) represents the local material thickness.
  • the lines represent the same aspects as in Fig. 3, but now for a typical can body according to the invention, e.g. a can body according to test run E.
  • the can body according to the invention has in combination a stepped wall thickness ("vary wall thickness") and bead groups.
  • the respective annular thinner and thicker wall portions coincide with bead groups having beads with a smaller or larger bead depth.
  • bead depth may be in the order of e.g. 0.25 mm, and for those located in the middle region where h is from 38 to 68 mm, bead depth may be in the order of e.g. 0.40 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Laminated Bodies (AREA)
  • Rolls And Other Rotary Bodies (AREA)
  • Chemically Coating (AREA)

Abstract

Cette invention concerne un corps de boîte métallique, qui comprend une paroi métallique circonférentielle cylindrique essentiellement ronde, présentant des sections annulaires à parois minces et épaisses choisies à dessin et comportant au moins partiellement de bourrelets.
EP05797351A 2004-10-15 2005-10-07 Corps de boîte en metal Withdrawn EP1812184A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05797351A EP1812184A2 (fr) 2004-10-15 2005-10-07 Corps de boîte en metal

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP04077847 2004-10-15
PCT/EP2005/010899 WO2006040116A2 (fr) 2004-10-15 2005-10-07 Corps de boite metallique
EP05797351A EP1812184A2 (fr) 2004-10-15 2005-10-07 Corps de boîte en metal

Publications (1)

Publication Number Publication Date
EP1812184A2 true EP1812184A2 (fr) 2007-08-01

Family

ID=34928573

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05797351A Withdrawn EP1812184A2 (fr) 2004-10-15 2005-10-07 Corps de boîte en metal

Country Status (6)

Country Link
US (1) US20080116212A1 (fr)
EP (1) EP1812184A2 (fr)
JP (1) JP2008516854A (fr)
BR (1) BRPI0516505A (fr)
CA (1) CA2584196A1 (fr)
WO (1) WO2006040116A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7726165B2 (en) 2006-05-16 2010-06-01 Alcoa Inc. Manufacturing process to produce a necked container
US7934410B2 (en) 2006-06-26 2011-05-03 Alcoa Inc. Expanding die and method of shaping containers
JP2011005540A (ja) * 2009-06-29 2011-01-13 Nippon Steel Corp 深絞り角缶および深絞り角缶の壁キャニング矯正方法
PL2605873T3 (pl) 2010-08-20 2022-04-11 Kaiser Aluminum Warrick, Llc Ukształtowany pojemnik metalowy i sposób jego wytwarzania
NZ701058A (en) * 2012-05-08 2016-03-31 Nestec Sa Containers having improved load-bearing capacity
US9327338B2 (en) 2012-12-20 2016-05-03 Alcoa Inc. Knockout for use while necking a metal container, die system for necking a metal container and method of necking a metal container

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US919345A (en) * 1906-11-21 1909-04-27 Pressed Steel Tank Company Metal barrel or cask.
US1340675A (en) * 1919-06-30 1920-05-18 Harry B Rose Annealing-box
US1839272A (en) * 1929-12-13 1932-01-05 Sinko John Process of making metallic containers
US2329970A (en) * 1942-02-11 1943-09-21 Universal Oil Prod Co Reaction vessel
US3027044A (en) * 1959-03-24 1962-03-27 Hedwin Corp Container or drum liner
US3951296A (en) * 1971-09-02 1976-04-20 National Steel Corporation Reinforced wall-ironed container
DE2937001A1 (de) * 1979-09-13 1981-04-02 Schmalbach-Lubeca Gmbh, 3300 Braunschweig Einendig offener behaelter aus metall
NL8301069A (nl) * 1983-03-28 1984-10-16 Hoogovens Groep Bv Driedelige metalen verpakkingsbus, halfprodukt voor de vervaardiging van deze bus, en een werkwijze voor de vervaardiging van metalen verpakkingsbussen.
NL1001974C2 (nl) * 1995-12-22 1997-06-24 Thomassen & Drijver Buswand met rillen en bus.
DK1294622T3 (da) * 2000-06-16 2004-07-19 Corus Staal Bv Metaldåse, der er en tryktæt metalemballering, og fremgangsmåde til fremstilling deraf

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006040116A2 *

Also Published As

Publication number Publication date
US20080116212A1 (en) 2008-05-22
JP2008516854A (ja) 2008-05-22
BRPI0516505A (pt) 2008-09-16
CA2584196A1 (fr) 2006-04-20
WO2006040116A2 (fr) 2006-04-20
WO2006040116A3 (fr) 2006-06-22

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