EP0852974B1 - Procédé de fabrication d'une boíte métallique de forme et boíte métallique du type boite-boisson obtenue par ce procédé - Google Patents

Procédé de fabrication d'une boíte métallique de forme et boíte métallique du type boite-boisson obtenue par ce procédé Download PDF

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Publication number
EP0852974B1
EP0852974B1 EP97402850A EP97402850A EP0852974B1 EP 0852974 B1 EP0852974 B1 EP 0852974B1 EP 97402850 A EP97402850 A EP 97402850A EP 97402850 A EP97402850 A EP 97402850A EP 0852974 B1 EP0852974 B1 EP 0852974B1
Authority
EP
European Patent Office
Prior art keywords
perimeter
peripheral skirt
zone
during
stage
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
EP97402850A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0852974A1 (fr
Inventor
Michel D'amore
Patrick Erhard
François Muia
Pierre Damiani
André Leplomb
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 EP0852974A1 publication Critical patent/EP0852974A1/fr
Application granted granted Critical
Publication of EP0852974B1 publication Critical patent/EP0852974B1/fr
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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

Definitions

  • the subject of the present invention is a method of manufacturing a metal can of form.
  • Food boxes of the drink box type are usually of cylindrical section and include, a bottom and a side wall made of material with this bottom and, on the other hand, a cover crimped on the edge free from the side wall.
  • This type of box is generally obtained by a drawing and drawing process.
  • the first consists in stamping a precouple and to re-stamp this precouple to form a cup having a bottom and a peripheral edge, then to stretch the peripheral edge of the cup so to get the box with a bottom and a side wall come of matter with this background.
  • the second technique is to stamp a metal blank to form a cup comprising a bottom and a peripheral edge and calibrate this cup to give it the diameter of the box, then to stretch the peripheral edge of the cup in order to obtain the box with its bottom and its side wall made of material with this background.
  • the free edge of the side wall is outlined, then we form the neck and the crimping edge according to two conventional techniques, either a matrix shrinking technique, or a wheel shrinking technique.
  • the dislocations generated in the metal are oriented in the same direction which limits the possibilities of subsequent deformation.
  • the metal gets breakage taking into account the mechanical characteristics high of the metal and therefore it is impossible to form this area by modifying the perimeter.
  • the object of the invention is to propose a method manufacturing of shaped metal boxes which allows to give the metal deformation capacities for be able to realize in particular on the side wall at least a shaped area without risk of breaking the metal in this area and without causing changes deep in the production line of these boxes.
  • the invention also relates to a box metallic of the beverage can type, characterized in that it obtained by the process mentioned above.
  • Fig. 1 there is shown schematically a metal box of shape designated in its together by the reference 1 which has a bottom 2, provided a foot 2a and a dome 2b and a side wall 3 coming of matter with said bottom.
  • the upper end of the side wall 3 is provided with a neck 4 and a crimping edge with a cover, not shown.
  • the method according to the invention makes it possible to restore metal to its deformation capacities to ability to create at least one area on the side wall shaping.
  • the method according to the invention consists, during a first step, to be carried out by stamping from a metal blank 10 (Fig. 2A) a cup 11 comprising a bottom 12 and a peripheral edge 13.
  • the foot 2a and the dome 2b of the bottom are formed during the second step at the end of stretching.
  • the peripheral skirt 17 has a thickness of between 0.06 and 0.10 mm or equal to these values and the thickness of the peripheral skirt 17 at the extra thickness 17a is included between 0.12 and 0.17 mm or equal to these values.
  • the peripheral skirt of the blank has a thickness between 0.10 and 0.12 mm or equal to these values and the thickness of the peripheral skirt at level of the allowance is between 0.15 and 0.20mm or equal to these values.
  • the extra thickness 17a is used to form the neck 4 and the crimping edge of the box 1 for crimping of the cover.
  • peripheral skirt 17 of the blank 15 thus performed at a perimeter P1, as shown in lines mixed in Fig. 2C.
  • the calibration operation is carried out in several successive passes in order to gradually bring the perimeter of the blank 15 at the nominal perimeter P2 using several sets of tools.
  • FIGs 3 and 4 there is shown a single pass and therefore a single set of tools.
  • This skirt calibration operation device 17 of the blank 15 is carried out using at least one set of tools which includes a shape 20 and a counterform 21.
  • Form 20 has on its upper face an imprint 21a of complementary shape at the bottom 16 of the blank 15 and at its bottom a recess 20b of complementary shape to the extra thickness 17a provided at level of the free edge of the peripheral skirt 17 of said draft 15.
  • the perimeter of form 20 of the last game of tools is approximately equal to the internal perimeter of the peripheral skirt 17 to be obtained after calibration of said peripheral skirt 17.
  • Counterform 21 has a bore central 21a intended to allow the passage of the counter-form 20 and the blank 15, as will be seen later.
  • This central bore 21a of the counterform 21 of the last set of tools is substantially equal to the external perimeter P2 of the peripheral skirt 17 after calibration.
  • peripheral skirt 17 of the blank 15 in the counterform 21 makes it possible to produce the calibration of this peripheral skirt 17 over its entire height by reducing the perimeter of said peripheral skirt 17 to gradually bring it to a perimeter nominal P2 determined, this nominal perimeter P2 being less than the perimeter P1.
  • the counterform 21 can be vertically movable and in this case it is the counterform 21 which descends gradually so as to calibrate the peripheral skirt 17 of the draft 15.
  • peripheral skirt calibration operation 17 of the blank 15 thus produced after drawing allows to give back to the metal over the entire height of this peripheral skirt 17 deformation capacities for be able to perform the shaped area 5 later.
  • the shaped area 5 is conventionally obtained by example by hydroforming or by segment tools expandable or buffered.
  • This shaped area 5 can be in relief towards the outside of the wall 3 of the box 1, as shown in Fig. 1.
  • the shaped area 5 can also be raised towards the inside of the side wall 3.
  • the nominal perimeter P2 is equal to the perimeter of the section side wall 3 of box 1 smaller perimeter.
  • the nominal perimeter P2 can also be less than the perimeter of the section of the side wall 3 of the box 1 of smaller perimeter.
  • the nominal perimeter P2 can still be greater than or equal to the perimeter of the section of the side wall 3 of the box 1 more large perimeter.
  • the nominal perimeter P2 is between the perimeter of the portion section 17c smaller diameter and the perimeter of the section of the portion 17b of larger diameter.
  • the step of calibration of the peripheral skirt 17 of the blank 15 after the step of stretching the peripheral edge 13 of the cup 11 allows to restore to metal the capacities of deformation to be able to achieve in particular on the wall lateral at least one shaped area without risk of metal breaking in this area and without adding operations additional in the production line of this type of boxes.
  • the method according to the invention can be implemented works from a metal blank in steel, in aluminum or aluminum alloy and from blanks of any section.
  • the shaped area can be carried out on a or more portions of the side wall of the box or over the entire height or the entire perimeter of this side wall or over the entire height and over all the perimeter of said side wall.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Table Devices Or Equipment (AREA)
  • Forging (AREA)
  • Stackable Containers (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Physical Vapour Deposition (AREA)
EP97402850A 1996-12-11 1997-11-26 Procédé de fabrication d'une boíte métallique de forme et boíte métallique du type boite-boisson obtenue par ce procédé Expired - Lifetime EP0852974B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9615230 1996-12-11
FR9615230A FR2756758B1 (fr) 1996-12-11 1996-12-11 Procede de fabrication d'une boite metallique de forme et boite metallique du type boite-boisson obtenue par ce procede

Publications (2)

Publication Number Publication Date
EP0852974A1 EP0852974A1 (fr) 1998-07-15
EP0852974B1 true EP0852974B1 (fr) 2002-04-03

Family

ID=9498560

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97402850A Expired - Lifetime EP0852974B1 (fr) 1996-12-11 1997-11-26 Procédé de fabrication d'une boíte métallique de forme et boíte métallique du type boite-boisson obtenue par ce procédé

Country Status (7)

Country Link
EP (1) EP0852974B1 (da)
AT (1) ATE215411T1 (da)
DE (1) DE69711587T2 (da)
DK (1) DK0852974T3 (da)
ES (1) ES2175305T3 (da)
FR (1) FR2756758B1 (da)
PT (1) PT852974E (da)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
USD1035386S1 (en) 2021-12-08 2024-07-16 Ball Corporation Tapered cup

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7934410B2 (en) 2006-06-26 2011-05-03 Alcoa Inc. Expanding die and method of shaping containers
EA025944B1 (ru) 2010-08-20 2017-02-28 Алкоа Инк. Фигурная металлическая емкость и способ ее изготовления
DE102011002206B3 (de) * 2011-04-20 2012-08-02 Schuler Pressen Gmbh Vorrichtung und Verfahren zur Herstellung eines Dosenkörpers mit einem Halsabschnitt
US11370579B2 (en) 2017-02-07 2022-06-28 Ball Corporation Tapered metal cup and method of forming the same
US10875076B2 (en) 2017-02-07 2020-12-29 Ball Corporation Tapered metal cup and method of forming the same
USD950318S1 (en) 2018-05-24 2022-05-03 Ball Corporation Tapered cup
USD906056S1 (en) 2018-12-05 2020-12-29 Ball Corporation Tapered cup
USD968893S1 (en) 2019-06-24 2022-11-08 Ball Corporation Tapered cup
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
USD953811S1 (en) 2020-02-14 2022-06-07 Ball Corporation Tapered cup
USD974845S1 (en) 2020-07-15 2023-01-10 Ball Corporation Tapered cup
CN116634908A (zh) 2020-10-30 2023-08-22 鲍尔公司 锥形杯及其形成方法
USD1012617S1 (en) 2021-02-22 2024-01-30 Ball Corporation Tapered cup

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3855862A (en) * 1973-04-23 1974-12-24 Continental Can Co Draw and wall iron process for metal cans
US4263800A (en) * 1979-03-26 1981-04-28 Reynolds Metals Company Method of forming a nestable container
GB8913209D0 (en) * 1989-06-08 1989-07-26 Metal Box Plc Method and apparatus for forming wall ironed articles
GB9319499D0 (en) * 1993-09-21 1993-11-03 Brownbill Thomas D Improvements in and relating to the shaping of articles
FR2731927B1 (fr) * 1995-03-21 1997-06-13 Lorraine Laminage Procede de fabrication d'une boite metallique de forme
FR2731929B1 (fr) * 1995-03-21 1997-06-13 Lorraine Laminage Procede de fabrication d'une boite metallique de forme

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
USD1035386S1 (en) 2021-12-08 2024-07-16 Ball Corporation Tapered cup

Also Published As

Publication number Publication date
DE69711587D1 (de) 2002-05-08
FR2756758B1 (fr) 1999-02-19
EP0852974A1 (fr) 1998-07-15
PT852974E (pt) 2002-09-30
ES2175305T3 (es) 2002-11-16
DK0852974T3 (da) 2002-07-15
ATE215411T1 (de) 2002-04-15
FR2756758A1 (fr) 1998-06-12
DE69711587T2 (de) 2002-10-31

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