EP0733414B1 - Herstellungsverfahren eines Metallbehälters in einer Form - Google Patents

Herstellungsverfahren eines Metallbehälters in einer Form Download PDF

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Publication number
EP0733414B1
EP0733414B1 EP96400484A EP96400484A EP0733414B1 EP 0733414 B1 EP0733414 B1 EP 0733414B1 EP 96400484 A EP96400484 A EP 96400484A EP 96400484 A EP96400484 A EP 96400484A EP 0733414 B1 EP0733414 B1 EP 0733414B1
Authority
EP
European Patent Office
Prior art keywords
zone
expanded
expansion
peripheral skirt
elementary
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
EP96400484A
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English (en)
French (fr)
Other versions
EP0733414A1 (de
Inventor
Patrick Erhard
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.)
Sollac SA
Original Assignee
Sollac SA
Lorraine de Laminage Continu SA SOLLAC
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 Sollac SA, Lorraine de Laminage Continu SA SOLLAC filed Critical Sollac SA
Publication of EP0733414A1 publication Critical patent/EP0733414A1/de
Application granted granted Critical
Publication of EP0733414B1 publication Critical patent/EP0733414B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D15/00—Corrugating tubes
    • B21D15/04—Corrugating tubes transversely, e.g. helically
    • B21D15/06—Corrugating tubes transversely, e.g. helically annularly
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/10—Stamping using yieldable or resilient pads
    • B21D22/105—Stamping using yieldable or resilient pads of tubular products
    • 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

Definitions

  • the subject of the present invention is a method manufacturing a shaped metal box, including, on the one hand, a bottom and a peripheral skirt cylindrical integral with said bottom and comprising at least one expanded area and, on the other hand, a cover set on the peripheral skirt.
  • metal boxes shaped consisting of a peripheral skirt comprising at least one expanded zone, with a crimped bottom at one end of the peripheral skirt and a cover crimped at the other end of said peripheral skirt.
  • the cover is provided for example with a easy opening device by breaking a line of less resistance or for example of a threaded neck intended to receive a screw cap.
  • peripheral skirt of this type of box metallic consists of a welded cylindrical shell longitudinally and comprising at least one zone expanded.
  • the peripheral skirt is produced from a mild steel metal blank with low carbon and with elastic limit of the order of 250 MPa.
  • a mild steel of this type allows local expansion of the welded cylindrical shell without great difficulty with an expansion rate calculated according to the formula: D final -D initial D initial x 100 up to 20%, D initial being the initial diameter of the welded shell and D final being the diameter of the peripheral skirt welded after expansion.
  • the formation of the expanded area is generally achieved by globally expanding on the entire height of the area to be expanded, either by a pressurized air or nitrogen forming process or by a forming process using a fluid incompressible or either by an expansion process mechanical using a sector tool.
  • the bottom and the peripheral skirt from material with this background are made from a cup cut from a metal blank or strip, either by stamping-re-stamping, or by stamping-ironing.
  • the overall possible rate of expansion of the peripheral skirt is around 2.5%.
  • the overall possible rate of expansion of the peripheral skirt is less than 1%, even for very thin, less than 0.5%.
  • the advantage of such a box metallic produced by the stamping-re-stamping technique or by the stamping-ironing technique is that it allows very small thicknesses because the constituent metal is a very stiff metal, high mechanical characteristics, which induces a low weight and low material cost.
  • such a box is made in two pieces, the bottom and the peripheral skirt having come from material thus conferring an advantage from the point of view aesthetic.
  • the object of the present invention is to provide a method of manufacturing a metal box of shape, of the beverage can type, comprising a bottom and a peripheral skirt integrally formed with said bottom, said peripheral skirt comprising at least one zone expanded with an expansion rate of around 8% in the case of a deep drawing-deep drawing technique and of the order of 3% in the case of a stamping-ironing technique.
  • this object is achieved by a method of manufacture of a shaped metal box, comprising, on the one hand, a background and a cylindrical peripheral skirt integrally formed with said bottom and comprising at least one expanded zone and, on the other hand, a cover set on the peripheral skirt, characterized in that said at least zone is produced by performing at least one step of expanding locally and successively elementary areas of the peripheral skirt starting with a first zone elementary located closest to the bottom to a last elementary area furthest from said bottom, said elementary areas partially overlapping to obtain said at least expanded zone.
  • the shaped box of the drink box type, includes a bottom 1 and a peripheral skirt 2 made integrally with said background 1.
  • the form box may include several expanded zones separated by intermediate zones each having a diameter less than diameter of the expanded zones.
  • the external profile of the expanded 2B zone can be flat as shown in fig. 1 or curved as shown in Fig. 2.
  • we form the expanded area by performing a overall expansion over the entire height of the area to be expanded, for example by a forming process with air or nitrogen under pressure or by a process of forming using an incompressible fluid or by a mechanical expansion process using a tool sectors.
  • Shaped boxes have been prepared for from this steel, on the one hand, by stamping-re-stamping of a metal blank to form cylindrical blanks consisting of a bottom and a skirt device of diameter D equal to 84mm, material with said bottom and, on the other hand, by stamping-ironing a metal blank to form drafts cylindrical with diameter D equal to 66mm, corresponding to usual drink cans.
  • zone 2B After formation of zone 2B by expansion overall, we see that the maximum diameter it is possible to get is equal to 86.1mm. If we increase still the diameter of the box in the expanded area, we witness a tear in the metal of the skirt wall peripheral.
  • the thickness of the wall of the peripheral skirt in the center of the expanded zone 2B of diameter equal to 86.1mm is equal to 0.12mm.
  • zone 2B After formation of zone 2B by expansion overall, we see that the maximum diameter it is possible to get is equal to 66.3mm, or a rate maximum expansion equal to 0.4%.
  • the thickness of the wall at center of the expanded 2B area is 0.135mm.
  • the method according to the invention makes it possible to realize on this type of shaped box, at least one area expanded whose expansion rate is increased so significant.
  • the manufacturing process according to the invention consists in making the expanded zone 2B by carrying out minus a step of expanding locally and successively elementary zones 10a, 10b, 10c ... 10n, of the peripheral skirt 2 starting with a first elementary zone 10a located closest to the bottom 1 up to the last elementary area 10n most distant from said bottom.
  • the elementary zones 10a, 10b, 10c ... 10n are partially overlap to obtain zone 2B expanded.
  • the formation of the zones 10a, 10b, 10c ... 10n is made in several stages i.e. in several passes successive so as to obtain, as shown in the Figures 1 and 2, a first diameter D'1 smaller than diameter D1 and so on until the diameter is obtained final D1 of the expanded zone 2B.
  • peripheral skirt 2 has at least two expanded zones, we first form the expanded area as shown above most near bottom 1, then the most distant expanded area said bottom 1.
  • the formation of the elementary zones 10a, 10B, 10c ... 10n is carried out using a tool 20 which comprises at its periphery an expansion rod 21 of corresponding shape to said elementary zones 10a, 10b, 10c ... 10n.
  • the diameter of the expansion rod 21 is less than or equal to 4% of the initial diameter D of the skirt device 2.
  • each elementary zone 10a, 10b, 10c ... 10n is greater or equal to 2/3 of the height h of the expansion rod 21, that is to say that the advancement step of the expansion ring 21 to form each elementary zone 10a, 10b, 10c ... 10n is less than or equal to a third of the height h of said expansion ring 21.
  • each area elementary 10a, 10b, 10c ... 10n is less than or equal to 1/6 of the height h of the expansion rod 21.
  • the expansion ring 21 may have a section in the shape of a spherical cap, a circular section, a rectangular section or a triangular section, this section being a function of the profile of the area 2B expanded to obtain.
  • the material constituting the expansion ring 21 is an elastomer.
  • Tool 20 can be formed by sectors juxtaposed and radially movable to form, by through the expansion ring 21, the elementary zones 10a, 10b, 10c ... 10n and the vertical displacement not step of this tool 20 can be controlled for example by a jack 22 (Fig. 4).
  • the displacements of the tool 20, that is to say expansion and advance step by step, can be controlled by a judicious programming allowing to realize a zone 2B expanded according to the desired profile.
  • a counterform 25 is placed around the peripheral skirt 2.
  • This counter-form 25 is for example made of elastomer and in this case it is applied directly to the outside of the skirt peripheral 2 or metal and in this case it spares with the outer face of the peripheral skirt a space free to allow the expansion of zone 2B.
  • the thickness of the wall of the peripheral skirt 2 in the center of zone 2B expanded east equal to 0.12mm.
  • the thickness of the wall of the peripheral skirt 2 in the center of the expanded 2B zone is equal to 0.14mm, 0.02mm more than if the expansion was performed globally over the entire height of the zone 2B to be expanded.
  • the thickness of the wall of the peripheral skirt 2 in the center of zone 2B expanded east equal to 0.136mm and the height of the box has decreased by 2mm from the height of the blank, which shows although there was a metal contribution from the part from the peripheral skirt on the side of its free edge towards the area undergoing expansion.
  • the manufacturing process for shaped boxes according to the invention therefore allows for boxes of shape with more marked curves and obtained from a metal blank made of steel, or aluminum or aluminum alloy.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)
  • Table Devices Or Equipment (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Claims (11)

  1. Verfahren zur Herstellung eines Metallbehälters in einer Form, die einerseits einen Boden (1) und einen umlaufenden zylindrischen Mantel (2) aus dem Material des Bodens (1) umfaßt und wenigstens eine erweiterte Zone (2B) aufweist und andererseits einen Deckel, der auf den umlaufenden Mantel aufgesetzt ist, dadurch gekennzeichnet, daß die wenigstens eine Zone (2B) hergestellt wird, indem wenigstens ein Schritt verwirklicht wird, der darin besteht, örtlich und nacheinander Teilzonen (10a,10b,10c,...10n) des umlaufenden Mantels (2) auszuweiten, indem in einer ersten Teilzone (10a) begonnen wird, das dem Boden (1) am nächsten liegt, bis hin zu einer letzten Teilzone (10n), die am weitesten vom Boden entfernt ist, welche Teilzonen (10a,10b,10c,...10n) sich teilweise überlappen zur Erzielung der wenigstens einen ausgeweiteten Zone (2B).
  2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß an dem umlaufenden Mantel (2) wenigstens zwei ausgeweitete Zonen hergestellt werden, indem zunächst die ausgeweitete Zone, die den Boden am nächsten liegt, und sodann die ausgeweitete Zone, die am weitesten vom Boden entfernt ist, gebildet wird.
  3. Verfahren nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß jede Teilzone (10a,10b,10c,...10n) hergestellt wird mit Hilfe eines Spreizringes (21), der in seiner Form derjenigen der Teilzone entspricht.
  4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß der Durchmesser des Spreizringes (21) kleiner oder gleich 4 % des Ausgangsdurchmessers des umlaufenden Mantels (2) beträgt.
  5. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die Überlappung der Teilzonen (10a,10b,10c,...10n) größer oder gleich 2/3 der Höhe des Spreizringes (21) beträgt.
  6. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die Tiefe jeder Teilzone (10a,10b,10c,...10n) kleiner oder gleich 1/6 der Höhe des Spreizringes (21) beträgt.
  7. Verfahren nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, daß der Spreizring (21) einen Abschnitt in der Form einer Kugelkalotte aufweist.
  8. Verfahren nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, daß der Spreizring (21) einen kreisförmigen Abschnitt aufweist.
  9. Verfahren nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, daß der Spreizring (21) einen rechtwinklingen Abschnitt aufweist.
  10. Verfahren nach einem der Ansprüche 3 bis 6, dadurch gekennzeichnet, daß der Spreizring (21) einen dreieckigen Abschnitt aufweist.
  11. Verfahren nach einem der Ansprüche 3 bis 10, dadurch gekennzeichnet, daß der Spreizring (21) aus einem Elastomer besteht.
EP96400484A 1995-03-21 1996-03-07 Herstellungsverfahren eines Metallbehälters in einer Form Expired - Lifetime EP0733414B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9503289A FR2731928B1 (fr) 1995-03-21 1995-03-21 Procede de fabrication d'une boite metallique de forme
FR9503289 1995-03-21

Publications (2)

Publication Number Publication Date
EP0733414A1 EP0733414A1 (de) 1996-09-25
EP0733414B1 true EP0733414B1 (de) 1999-10-06

Family

ID=9477254

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96400484A Expired - Lifetime EP0733414B1 (de) 1995-03-21 1996-03-07 Herstellungsverfahren eines Metallbehälters in einer Form

Country Status (8)

Country Link
US (1) US5899105A (de)
EP (1) EP0733414B1 (de)
JP (1) JPH08257659A (de)
AT (1) ATE185295T1 (de)
CA (1) CA2172227A1 (de)
DE (1) DE69604520T2 (de)
ES (1) ES2138298T3 (de)
FR (1) FR2731928B1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0029459D0 (en) * 2000-12-04 2001-01-17 Corus Uk Ltd Metal container suitable to accommodate a heating or cooling component and method for manufacturing it
DE10261534A1 (de) * 2002-12-23 2004-07-15 Alexander Christ Spraydose
WO2005061149A2 (en) * 2003-12-22 2005-07-07 Glud & Marstrand A/S A method and an installation for forming a metal container and a metal container for storing of foodstuff
JP4616678B2 (ja) * 2005-03-25 2011-01-19 株式会社神戸製鋼所 包装容器およびその製造方法
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
MY175342A (en) 2010-08-20 2020-06-19 Alcoa Inc Shaped metal container and method for making same
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
AU2014317870B2 (en) * 2013-09-06 2018-02-15 Arconic Technologies Llc Aluminum alloy products and methods for producing same
CN105817512B (zh) * 2016-05-17 2017-10-03 安徽中鼎金亚汽车管件制造有限公司 一种油冷器金属管加工成型设备

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1645971A (en) * 1922-08-25 1927-10-18 Clarence H Riegel Method of making sheet-metal barrels
DE749792C (de) * 1935-09-17 1944-12-06 Verfahren zur Herstellung von ausgebauchten rohrfoermigen Koerpern, z.B. Metallfass-Maenteln
US2194385A (en) * 1936-09-25 1940-03-19 Barringer Wallis & Manners Ltd Means for shaping tubes or containers
GB1075856A (en) * 1963-09-18 1967-07-12 Metal Containers Ltd An apparatus for forming a plurality of axially spaced beads in a hollow, substantially cylindrical sheet metal blank
AU7082874A (en) * 1973-07-06 1976-01-08 Dunlop Ltd Die presses
US4331014A (en) * 1980-02-29 1982-05-25 Gulf & Western Manufacturing Company Can beading apparatus
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
JPH08257659A (ja) 1996-10-08
FR2731928A1 (fr) 1996-09-27
FR2731928B1 (fr) 1997-06-13
EP0733414A1 (de) 1996-09-25
ATE185295T1 (de) 1999-10-15
DE69604520D1 (de) 1999-11-11
CA2172227A1 (fr) 1996-09-22
ES2138298T3 (es) 2000-01-01
DE69604520T2 (de) 2000-01-20
US5899105A (en) 1999-05-04

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