EP0780314B1 - Behälterwand mit Bördelrand sowie Behälter - Google Patents

Behälterwand mit Bördelrand sowie Behälter Download PDF

Info

Publication number
EP0780314B1
EP0780314B1 EP19960203583 EP96203583A EP0780314B1 EP 0780314 B1 EP0780314 B1 EP 0780314B1 EP 19960203583 EP19960203583 EP 19960203583 EP 96203583 A EP96203583 A EP 96203583A EP 0780314 B1 EP0780314 B1 EP 0780314B1
Authority
EP
European Patent Office
Prior art keywords
bead
wall
accordance
length
beads
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.)
Expired - Lifetime
Application number
EP19960203583
Other languages
English (en)
French (fr)
Other versions
EP0780314A1 (de
Inventor
Hein Willem Leendert Van Jaarsveld
Stephanus Maria Kamperman
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.)
Impress BV
Tata Steel Ijmuiden BV
Original Assignee
Corus Staal BV
Impress 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, Impress BV filed Critical Corus Staal BV
Publication of EP0780314A1 publication Critical patent/EP0780314A1/de
Application granted granted Critical
Publication of EP0780314B1 publication Critical patent/EP0780314B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65D7/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal
    • B65D7/42—Details of metal walls
    • B65D7/44—Reinforcing or strengthening parts or members
    • B65D7/46—Corrugations
    • 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
    • B21D51/02—Making hollow objects characterised by the structure of the objects
    • B21D51/12—Making hollow objects characterised by the structure of the objects objects with corrugated walls

Definitions

  • the invention relates to a can-wall with beads according to the preamble of claim 1 and a can comprising such a can wall.
  • a can provided with a base and lid must fulfil certain requirements in terms of axial and radial strength. In its unfilled state the can must be able without collapsing to withstand an axial loading by a force of for example 2000 N, and in its filled state a radial loading associated with an overpressure from the outside of for example 1.2 bars.
  • the known can is provided with beads on its can-wall. The beads provide increased axial and, to a greater extent, radial strength.
  • GB 22,245 discloses a metal barrel having a casing provided along its complete length with closely arranged circumferential corrugations for stiffening purposes.
  • the can-wall is provided to that end with a bead geometry which satisfies the conditions stated in claim 1.
  • the optimum for the bead b x most susceptible to collapsing is to select the smallest possible yet still acceptable bead length ⁇ x , and to give the bead length elsewhere, depending on the lesser susceptibility to collapsing there, a larger bead length ⁇ i > ⁇ x .
  • the bead length increases with the distance to the bead b x most susceptible to collapsing.
  • the can-wall in the state whereby the base part and lid part join onto them is the most susceptible to deformation by a radial loading, ⁇ i , i ⁇ x > ⁇ x and the extremities of bead valley and bead peak comprise a segment of a circle with radius of curvature R i and that for at least bead b x of the profile R x ⁇ ( ⁇ x 2 + 4 V x 2 ) / 16 V x .
  • each bead b i fulfils the proposed geometric proportions.
  • better cans are made in terms of stiffness and strength if the can-wall is characterized in that for each bead b i of the profile R i ⁇ ( ⁇ i 2 + 4 V i 2 ) / 16 V i applies.
  • the invention is also embodied in the finished (filled) can. After filling, the axial stiffness and strength of the can are no longer critical, but a radial loading from the outside is critical.
  • Fig. 1 the relationship between the thickness of the base and the lid, is expressed in mm vertically, and the thickness of the can-wall, is expressed in mm horizontally with the weight of a can ⁇ 73 x 100 (mm x mm) indicated by lines of constant weight of 40, 45, 50, 55, 60 g.
  • a can approximately 2/3 of the weight of the can is formed by the can-wall and 1/3 by lid and base. Therefore it is certainly worthwhile to reduce the thickness of the can-wall if it is desired to reduce the weight of a can as indicated by the arrow which is drawn from a starting point selected here as reference point for the known can.
  • Figs. 2, 4, 5 and 6 always show horizontally the radial strength of a can-wall in bars, and vertically the axial strength in N.
  • Each of the collapse diagrams indicates with a thick line 2060 N as critical axial strength, and 1.2 bars as critical radial strength.
  • the can-wall geometry involved fulfils requirements.
  • Fig. 2 shows what the important effect is of changing the thickness of the can-wall t and the bead height V.
  • Fig. 3 indicates with ⁇ the bead length, with t the thickness of the can-wall, with R the radius of curvature with which the bead peak and bead valley are entered and left respectively, with L the top length and with V the bead height.
  • Fig. 5 shows that preference is given to use of packaging steel with a quality indicated as DR 580.
  • Fig. 6 shows that the number of beads N must preferably be great, and the bead height V relatively small. This applies for a can-wall in unassembled state, that is one which lacks support from base and lid.
  • Fig. 7 shows schematically how ⁇ , V and R are related in the case of a relatively smooth bead (left) and a sharp bead (right).
  • V the can-wall strength is the least dependent on variations in the bead height which always occur in the practice of manufacturing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)

Claims (6)

  1. Dosenwand, die in Aufeinanderfolge aufweist: einen ersten Fügeteil zum Fügen an einen Basisteil, einen ersten Teil ohne Wulst, einen Wulstteil, einen zweiten Teil ohne Wulst und einen zweiten Fügeteil zum Fügen an einen Deckelteil, wobei der Wulstteil n fortlaufend numerierte Wülste bi hat, i = 1, ..., x, ..., n, wobei jeder Wulst ein Wulsttal und einen Wulstgipfel aufweist, die sich über eine projizierte Länge λi erstrecken, dadurch gekennzeichnet, daß für den Wulst bx, der für Einknicken am anfälligsten ist, eine relativ geringe Wulstlänge ausgewählt ist, und daß die Wulstlänge woanders in Abhängigkeit von der geringeren Anfälligkeit für Einknicken dort eine größere Wulstlänge erhält: λi, i ≠ x > λx.
  2. Dosenwand nach Anspruch 1, dadurch gekennzeichnet, daß λi > λi+1 für i = 1, ..., x -1 und λi+1 > λi für i = x + 1, ..., n.
  3. Dosenwand nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß λi ≅ d λi+1 für i = 1, ... , x - 1 und λi+1 ≅ c λi für i = x + 1, ..., n, wo d und c Faktoren sind, die von der Fluktuation der Anfälligkeit gegenüber Verformung durch die radiale Belastung über den Wulstteil i < x und i ≥ x bestimmt sind, wobei c ≅ d ≥ 1,05.
  4. Dosenwand nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Extrema des Wulsttales und des Wulstgipfels ein Kreissegment mit einem Krümmungsradius Ri aufweisen, und daß wenigstens für bx Rx ≅ (λx 2 + 4Vx 2)/16Vx, wobei Vi die Wulsthöhe zwischen dem Oberteil des Wulstgipfels und dem Boden des Wulsttales ist.
  5. Dosenwand nach Anspruch 4, dadurch gekennzeichnet, daß für jeden Wulst bi gilt: Ri ≅ (λi 2 + 4Vi 2)/16Vi.
  6. Dose mit einer Dosenwand nach einem der vorhergehenden Ansprüche.
EP19960203583 1995-12-22 1996-12-18 Behälterwand mit Bördelrand sowie Behälter Expired - Lifetime EP0780314B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1001974A NL1001974C2 (nl) 1995-12-22 1995-12-22 Buswand met rillen en bus.
NL1001974 1995-12-22

Publications (2)

Publication Number Publication Date
EP0780314A1 EP0780314A1 (de) 1997-06-25
EP0780314B1 true EP0780314B1 (de) 2004-09-29

Family

ID=19762082

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960203583 Expired - Lifetime EP0780314B1 (de) 1995-12-22 1996-12-18 Behälterwand mit Bördelrand sowie Behälter

Country Status (3)

Country Link
EP (1) EP0780314B1 (de)
DE (1) DE69633491T2 (de)
NL (1) NL1001974C2 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1238917A1 (de) * 2001-03-06 2002-09-11 Crown Cork &amp; Seal Technologies Corporation Kronkorkenverschluss mit gerollter unterer Kante
BRPI0516505A (pt) * 2004-10-15 2008-09-16 Corus Staal Bv corpo de lata de metal

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191322245A (en) * 1913-10-02 1913-12-18 Wilhelm Sohler Improvements in and connected with the Manufacture of Sheet Metal Barrels.
FR2634405A1 (fr) * 1988-07-19 1990-01-26 Carnaud Sa Procede et dispositif de fabrication d'elements tubulaires cylindriques tels que des corps de fut et elements tubulaires cylindriques obtenus selon ce procede

Also Published As

Publication number Publication date
DE69633491T2 (de) 2005-10-13
NL1001974C2 (nl) 1997-06-24
EP0780314A1 (de) 1997-06-25
DE69633491D1 (de) 2004-11-04

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