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EP0733415B1 - Procédé de fabrication d'une boíte métallique de forme - Google Patents

Procédé de fabrication d'une boíte métallique de forme Download PDF

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Publication number
EP0733415B1
EP0733415B1 EP96400559A EP96400559A EP0733415B1 EP 0733415 B1 EP0733415 B1 EP 0733415B1 EP 96400559 A EP96400559 A EP 96400559A EP 96400559 A EP96400559 A EP 96400559A EP 0733415 B1 EP0733415 B1 EP 0733415B1
Authority
EP
European Patent Office
Prior art keywords
diameter
peripheral skirt
blank
zone
box
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
EP96400559A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0733415A1 (fr
Inventor
Michel D'amore
Patrick Erhard
François Muia
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 EP0733415A1 publication Critical patent/EP0733415A1/fr
Application granted granted Critical
Publication of EP0733415B1 publication Critical patent/EP0733415B1/fr
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
    • 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
    • B21D51/2646—Of particular non cylindrical shape, e.g. conical, rectangular, polygonal, bulged
    • 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
    • B21D22/20—Deep-drawing
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching

Definitions

  • the subject of the present invention is a method manufacturing a metal can of shape, according to preamble of claim 1, of the type drink box, and more particularly a box metallic shape comprising, on the one hand, a bottom and a peripheral skirt comprising a succession of zones of different diameters and, on the other hand, a cover set on the peripheral skirt.
  • metal boxes shaped consisting of a peripheral skirt comprising a succession of zones of different diameters, a bottom set at one end of the peripheral skirt, and a cover crimped at the other end of said peripheral skirt.
  • This cover is provided for example with a easy opening device by breaking a line of lower resistance or 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 expanded to spare the succession zones of different diameters.
  • the peripheral skirt is produced from a mild steel metal blank with low carbon and with elastic limit approximately equal to 250 MPa.
  • Such a steel allows an expansion of the welded shell without great difficulty with an expansion rate calculated according to the formula: D final - D initial D initial x 100 up to 20%, initial D being the initial diameter of the welded shell and final D being the diameter of the welded shell after expansion.
  • the said shell is expanded to obtain a peripheral skirt comprising a succession of zones of different diameters, and we crimp a bottom and a cover respectively at each end of the shell.
  • the expansion of the shell generally takes place using an air or nitrogen forming process under pressure or a fluid forming process incompressible.
  • the bottom and the peripheral skirt from material with said bottom are manufactured in particular by stamping-ironing from a cut-out cup in a metal blank or strip.
  • the cup first undergoes a relatively severe swaging on a press which conventionally comprises, on the one hand, a fixed punch and a support forming a peripheral blank holder sliding around said punch and on which rests the cup and, on the other hand, a matrix intended to be applied to the cup with force vertically transmitted by an upper slide.
  • the cup with a bottom and an edge formed during stamping is then either calibrated by a light drawing without the use of a blank holder, either re-stamped with a blank holder, then is subject to an ironing operation which consists of stretch by means of a drawing machine, by reductions successive, the edge to gradually form the skirt device of the box.
  • the bottom is formed on the drawing machine to give it a determined geometry and the neck of the peripheral skirt is formed, either according to a technique shrinking with matrix, either using a shrunk with the wheel.
  • the shrinking technique with matrix is to force the cervix into a matrix with a conical inlet profile and a cylindrical outlet profile.
  • a cylindrical piece guides the wall formed at the outlet of the matrix.
  • the force required to allow the deformation metal comes from the thrust applied to the bottom of the box and transmitted axially by its skirt peripheral.
  • the wheel shrinking technique consists in driving the box in rotation which is held between a pusher and a centering ring.
  • the profile of the cervix is obtained by simultaneous movements knobs, centering ring and pusher.
  • This type of box is generally made at from a very low carbon steel blank.
  • the metal After stretching the edges of the peripheral skirt, the metal is strongly hardened so that its limit of elasticity in the walls of the peripheral skirt is around 700 MPa and sometimes even exceeds this value, which gives it an ability to expand practically zero.
  • 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 is that it allows very small thicknesses, because the metal constituent is a very stiff metal with 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, which gives it an advantage from the point of view aesthetic.
  • the object of the invention is to propose a method for manufacturing a metal box of obtained shape for example by stamping-ironing, of the drink-can type, comprising a bottom and a peripheral skirt coming of matter with said bottom, which allows to obtain expansion rate at the peripheral skirt greater than 2%.
  • the box of shape of the drink-box type comprises a bottom 1 and a peripheral skirt 2 formed integrally with said bottom 1.
  • the method according to the invention consists, in a first step shown in FIG. 2, to be carried out for example by stamping-ironing from a metal blank, in steel, or aluminum or aluminum alloy, a cylindrical blank 3 of diameter equal to diameter D of zone 2A of the peripheral skirt 2 of the box formed, adjacent to the bottom 1 in this exemplary embodiment.
  • cylindrical blank 3 by stamping a metal blank to form a cup, deep-drawing from the bottom of the cup to reduce the diameter of the bottom and stretching the edges of the re-drawn cup.
  • the area of diameter D is no longer adjacent to the bottom.
  • a shrinking operation is carried out on the part of the peripheral skirt of the blank 3 located above zone 2A of the peripheral skirt 2 of the box formed to bring it to a determined diameter D1 less than the diameter D of zone 2A.
  • the diameter D1 is equal to the diameter of zone 2C of the peripheral skirt 2 of the box formed.
  • This shrinking operation is carried out in one or several passes using a known type of tool consisting of a matrix with an input profile conical and a cylindrical outlet profile, associated with a cylindrical part which guides the wall formed at the outlet of the matrix.
  • the force required to allow the deformation metal comes from the thrust applied to the bottom of the box and transmitted axially by its skirt peripheral.
  • the geometry of the different matrices used in each forming step depends on the desired profile in the intermediate portion 2B so to obtain the desired profile in said intermediate portion 2B.
  • the process according to the invention consists in performing at least one expansion operation of the part of the peripheral skirt of blank 3, located above the area of diameter D to carry out the succession of zones of different diameters of the peripheral skirt 2 of the box formed.
  • the third step consists, as shown in Fig. 4, to carry out an expansion of the part of the peripheral skirt of the blank 3 located above zone 2C previously constricted of the peripheral skirt 2 of the box formed, to bring it to the diameter D2.
  • This expansion operation can be carried out using different techniques.
  • the technique of matrix expansion consists in forcing the free edge of the peripheral skirt of the blank 3 in a matrix having a profile cylindrical inlet and a conical outlet profile, associated with a part ensuring the guidance of the wall formed at the outlet of the matrix.
  • the geometry of the different matrices used in each type of forming depends on the desired profile in the intermediate 2D portion.
  • the expansion technique can also be a mechanical expansion forming technique using of a sector tool or an expansion technique to using an incompressible fluid such as air, nitrogen or an oil.
  • the fourth step shown in FIG. 5, consists in carrying out a new shrinking operation of the part of the peripheral skirt of the blank 3, located above zone 2E, previously expanded, to bring it to diameter D3 taking care to conform the intermediate portion 2F according to the desired profile.
  • the fifth step shown in FIG. 6, consists in carrying out a new expansion operation of the part of the peripheral skirt of the blank 3, located above the 2G zone, previously narrowed, to bring it to diameter D4, taking care to conform the intermediate portion 2H according to the desired profile.
  • the sixth step is to perform a final operation to shrink the part of the peripheral skirt of the blank 3, located above the zone 2I, previously expanded, to bring it to the diameter D5, taking care to conform the portion intermediate 2J according to the desired profile, and to achieve the planking used for crimping the cover.
  • the box form according to a second embodiment comprises a bottom 10 and a peripheral skirt 11 formed integrally with the bottom 10.
  • zone 11C located above zone 11A adjacent to bottom 10 has a diameter D6 greater than the diameter D of zone 11A of the peripheral skirt 11 of the box formed.
  • the manufacturing process according to the invention of such a form box consists, in a first step, to be carried out for example by stamping-ironing from a metal blank made of steel, or aluminum or aluminum alloy, a cylindrical blank of diameter equal to the diameter D of the zone 11A of the skirt peripheral 11 adjacent to the bottom 10, then, in a second step, to perform a shrinking operation of the part of the peripheral skirt of the blank for bring it to the determined diameter less than the diameter D from zone 11A.
  • this diameter can be equal to the diameter of the skirt area device 11 of the lower formed box diameter, i.e. the diameter D8 in FIG. 7.
  • the diameter D8 will be chosen smaller than this diameter D, because it is absolutely essential to start with a shrinking operation to be able to make a form box with rates expansion greater than 1% from a blank obtained for example by stamping-ironing a blank metallic.
  • the third step of the process of the invention consists in perform the expansion, in one or more operations, zones 11C and 11E of the peripheral skirt of the blank to give each of these areas the desired profile.
  • the first step consisted in making by stamping-ironing, a cylindrical blank with a diameter equal to the diameter D.
  • the second step of performing the shrinking operation is in this case carried out from of zone 11C of diameter D6.
  • the important characteristic of method according to the invention lies in the fact of starting forming the blank by stamping and ironing by a shrinking operation.
  • Tests have been carried out on bodies of boxes with a diameter of 66mm, varying the rate from the first operation and by performing then a maximum global expansion.
  • the manufacturing process for shaped boxes according to the invention allows to form boxes with more marked curves and this process is easy to implement industrially because the tools for carrying out shrinking and expansion operations are known and used by packaging manufacturers metallic.
  • the process according to the invention is not limited stamped-ironed boxes, but can also be applied for the realization of shaped boxes from a blank obtained by stamping-re-stamping a metal blank made of steel, or aluminum or aluminum alloy.
  • the expansion rate goes from 3% at around 6%.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Table Equipment (AREA)
EP96400559A 1995-03-21 1996-03-18 Procédé de fabrication d'une boíte métallique de forme Expired - Lifetime EP0733415B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9503290A FR2731929B1 (fr) 1995-03-21 1995-03-21 Procede de fabrication d'une boite metallique de forme
FR9503290 1995-03-21

Publications (2)

Publication Number Publication Date
EP0733415A1 EP0733415A1 (fr) 1996-09-25
EP0733415B1 true EP0733415B1 (fr) 1999-10-06

Family

ID=9477255

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96400559A Expired - Lifetime EP0733415B1 (fr) 1995-03-21 1996-03-18 Procédé de fabrication d'une boíte métallique de forme

Country Status (20)

Country Link
US (1) US6286357B1 (zh)
EP (1) EP0733415B1 (zh)
JP (1) JPH08257660A (zh)
KR (1) KR960033595A (zh)
CN (1) CN1142419A (zh)
AR (1) AR001233A1 (zh)
AT (1) ATE185296T1 (zh)
AU (1) AU715960B2 (zh)
BR (1) BR9601062A (zh)
CA (1) CA2172230A1 (zh)
CZ (1) CZ286337B6 (zh)
DE (1) DE69604521T2 (zh)
DK (1) DK0733415T3 (zh)
ES (1) ES2140041T3 (zh)
FR (1) FR2731929B1 (zh)
HU (1) HUP9600696A2 (zh)
IL (1) IL117555A0 (zh)
PL (1) PL313372A1 (zh)
SK (1) SK283151B6 (zh)
TR (1) TR199600228A1 (zh)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6253597B1 (en) 1988-02-19 2001-07-03 Corus Staal B.V. Body-necking a wall-ironed can
NL1005340C2 (nl) * 1997-02-21 1998-08-26 Hoogovens Staal Bv Bodynecken wandgestrekte bus.
JP3441317B2 (ja) * 1996-10-21 2003-09-02 大和製罐株式会社 胴部に凹凸模様をもつ変形金属缶の製造方法
FR2756758B1 (fr) * 1996-12-11 1999-02-19 Lorraine Laminage Procede de fabrication d'une boite metallique de forme et boite metallique du type boite-boisson obtenue par ce procede
FR2756757B1 (fr) * 1996-12-11 1999-02-19 Lorraine Laminage Procede de fabrication d'une boite metallique de forme et boite metallique alimentaire obtenue par ce procede
CN1309619C (zh) * 2001-12-28 2007-04-11 三菱麻铁里亚尔株式会社 瓶罐体、瓶以及螺纹成形装置
CN100398412C (zh) * 2003-11-05 2008-07-02 欧亚包装（中山）有限公司 一种气雾剂包装罐的生产方法
CN100436283C (zh) * 2003-11-05 2008-11-26 欧亚包装（中山）有限公司 一种气雾剂包装罐的生产方法
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
GB0817942D0 (en) * 2008-10-01 2008-11-05 Obrist Closures Switzerland A method of shaping metal closures
KR20180050415A (ko) 2010-08-20 2018-05-14 알코아 유에스에이 코포레이션 성형 금속 용기 및 그 제작 방법
US8978922B2 (en) 2012-05-15 2015-03-17 Silgan Containers Llc Strengthened food container and method
US9382034B2 (en) 2012-05-15 2016-07-05 Silgan Containers Llc Strengthened food container and method
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
USD696594S1 (en) 2012-12-21 2013-12-31 Sligan Containers LLC Container
EP2859966A1 (en) * 2013-10-08 2015-04-15 Ardagh MP Group Netherlands B.V. Shaped metcal container and a method for making a shaped metal container
CN103817259A (zh) * 2014-03-06 2014-05-28 上海将佳气雾剂有限公司 一种异形卷口微型铝瓶的成型工艺
US9358604B2 (en) 2014-06-12 2016-06-07 Ball Corporation System for compression relief shaping
CN104907451B (zh) * 2015-05-30 2018-08-31 宁波新同翔包装科技有限公司 异形铝杯及其生产方法
CN111054818B (zh) * 2019-11-21 2021-08-03 深圳市君灏精密工业有限公司 零件冲压方法

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
DE517913C (de) * 1927-05-25 1931-02-09 Henry Ernest Rainaud Verfahren zum drehenden Druecken von Zierrohren aus einem rohrfoermigen Werkstueck
CH475804A (fr) * 1967-06-26 1969-07-31 Alusuisse Procédé de fabrication d'une enveloppe métallique et enveloppe obtenue par la mise en oeuvre du procédé
FR1583643A (zh) * 1968-01-09 1969-11-21
HU185394B (en) * 1980-12-05 1985-01-28 Matravideki Femmuevek Method for forming the neck and spout part of aluminium aerosol bottles
FR2683750B1 (fr) * 1991-11-19 1995-09-01 Cmb Packaging Sa Procede pour conformer un corps de boite metallique et installation de conformation d'un tel corps de boite.
CA2133312A1 (en) * 1993-01-29 1994-07-30 Martin Nussbaum Process and installation for producing aluminium cans for beverages or foodstuffs

Also Published As

Publication number Publication date
SK37296A3 (en) 1997-07-09
CZ286337B6 (cs) 2000-03-15
DE69604521D1 (de) 1999-11-11
ATE185296T1 (de) 1999-10-15
HUP9600696A2 (en) 1996-12-30
FR2731929A1 (fr) 1996-09-27
CZ75296A3 (en) 1996-11-13
DE69604521T2 (de) 2000-02-10
FR2731929B1 (fr) 1997-06-13
JPH08257660A (ja) 1996-10-08
DK0733415T3 (da) 2000-04-17
AR001233A1 (es) 1997-09-24
SK283151B6 (sk) 2003-03-04
CN1142419A (zh) 1997-02-12
TR199600228A1 (tr) 1996-10-21
BR9601062A (pt) 1998-01-06
AU715960B2 (en) 2000-02-10
IL117555A0 (en) 1996-07-23
EP0733415A1 (fr) 1996-09-25
AU4824096A (en) 1996-10-03
PL313372A1 (en) 1996-09-30
US6286357B1 (en) 2001-09-11
ES2140041T3 (es) 2000-02-16
KR960033595A (ko) 1996-10-22
HU9600696D0 (en) 1996-05-28
CA2172230A1 (fr) 1996-09-22

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