EP0512984B1 - Verfahren und vorrichtung zur herstellung von behältern - Google Patents

Verfahren und vorrichtung zur herstellung von behältern Download PDF

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Publication number
EP0512984B1
EP0512984B1 EP90907607A EP90907607A EP0512984B1 EP 0512984 B1 EP0512984 B1 EP 0512984B1 EP 90907607 A EP90907607 A EP 90907607A EP 90907607 A EP90907607 A EP 90907607A EP 0512984 B1 EP0512984 B1 EP 0512984B1
Authority
EP
European Patent Office
Prior art keywords
container
wall
side wall
jig
reforming
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
EP90907607A
Other languages
English (en)
French (fr)
Other versions
EP0512984A1 (de
Inventor
Andrew Halasz
Sylvan Praturlon
Thomas E. Moloney
Nelson N. Chernikoff
Richard D. Zenger
Edward K. Cassidy
John M. Mann
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.)
Rexam Beverage Can Co
Original Assignee
American National Can Co
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 American National Can Co filed Critical American National Can Co
Publication of EP0512984A1 publication Critical patent/EP0512984A1/de
Application granted granted Critical
Publication of EP0512984B1 publication Critical patent/EP0512984B1/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
    • 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
    • B21D22/10—Stamping using yieldable or resilient pads

Definitions

  • This invention relates generally to two-piece container constructions, and more particularly to a method and apparatus for processing such containers to increase the strength thereof, as well as improve the appearance.
  • Two-piece cans are the most common type of metal container used in the beer and beverage industry, as well as for aerosol and food packaging.
  • the two-piece container consists of a unitary body, including a side wall open at one end with an integral end wall at the other end.
  • the integral end wall is usually formed to a domed-shaped configuration to increase the overall strength of the container.
  • An annular portion is usually formed to a special configuration between the center dome panel of the bottom wall and the side wall that defines a reduced diameter support for the container and also provides a nesting feature for nesting with the end of an adjacent container, which is seamed to the open end thereof.
  • U.S. Patent No. 4,685,582 An exemplary bottom profile for a drawn and ironed container that has achieved a remarkable degree of commercial success is disclosed in U.S. Patent No. 4,685,582.
  • the container disclosed therein also includes an upper end portion that has a reduced neck so that a second end panel or end having a smaller diameter can be utilized to enclose the open-ended drawn and ironed container.
  • containers that are used for beer and carbonated beverages are formed from a flat aluminum disc to an outside diameter of 2-11/16th inch (referred to as a "211-container") and the upper open end is reduced in diameter to form a 209-neck (2-9/16th inch) or any other smaller diameter, such as a 2071 ⁇ 2-neck, a 206-neck, and even a 204-neck or smaller so that smaller diameter ends can be utilized in the finished package.
  • 211-container 2-11/16th inch
  • any other smaller diameter such as a 2071 ⁇ 2-neck, a 206-neck, and even a 204-neck or smaller so that smaller diameter ends can be utilized in the finished package.
  • the integral bottom end wall of the container usually has the same metal thickness gauge as the initial disc and the side wall is reduced through a drawing and ironing process to a thickness approaching one-third of the thickness of the original metal disc. Accordingly, to minimize overall weight, the can top or end panel that forms the second piece of the two-piece can is made as diametrically small as possible, while still maintaining the structural integrity of the container, the functionality thereof, and an aesthetically-pleasing appearance.
  • a sheet of stock material of predetermined thickness is fed to a cupping press, wherein circular discs are cut from the stock material and are transformed into cups having a diameter which is considerably larger than the ultimate diameter of the finished container.
  • the preformed cups are then transferred to a container-forming apparatus, commonly referred to as a "bodymaker", wherein the cup is aligned with a punch carried on a reciprocable ram which cooperates with a plurality of spaced ironing dies and a doming mechanism located at the end of the path of the punch.
  • the punch initially cooperates with a redraw assembly in which the shallow cup is redrawn to a smaller diameter that has an internal diameter approximately equal to the internal diameter of the ultimately-finished container and a height that is greater than the height of the original cup.
  • Each cup then passes through a series of ironing dies having progressively reduced diameters so that the side wall of the container is progressively reduced in thickness, while the height of the container increases.
  • the end of the container is forced into a predetermined configuration to form an integral end wall that has a central inwardly-domed panel and a specially-configured peripheral annular bead or support portion.
  • the drawn and ironed container is then trimmed to a selected height and coated and labeled, and a reduced tapered neck is produced on the open end.
  • the Assignee of the present invention has developed a die necking operation for sequentially reducing the upper open end of the container to a smooth die neck configuration. This is done through a plurality of steps until the desired reduction for an end, such as a 206- or 204-end, is achieved.
  • This process is disclosed in U.S. Patent No. 4,774,839, incorporated herein by reference.
  • a container of the type having a bottom profile, such as disclosed in U.S. Patent No. 4,685,582, and a smooth die neck configuration illustrated in the above-referenced patent has increased strength characteristics and the overall aesthetic appearance has been enhanced.
  • a method of furthering production of a container having a longitudinal axis and a side wall which is integral with a bottom having a center domed portion, and a countersink having an annular, substantially longitudinal inner wall and an outer annular wall
  • the step of reforming the bottom characterized by: supporting said container in a jig, said jig having a bottom peripheral profile portion substantially corresponding in shape to said outer annular wall of said container; mating the bottom peripheral profile portion of said jig with said outer annular wall; and bringing a reforming roller into engagement with said inner wall, said reforming roller rotating along said inner wall and about an arcuate path in substantially radial alignment with said mating of said jig and said outer annular wall.
  • the invention includes apparatus, according to claim 5.
  • WO83/02577 which forms the base of the preambles of claims 1 and 5 discloses various embodiments for reforming the bottom countersink of a container.
  • the container 10 is supported at its open end by a rotatable pad and at its closed end by various configurations of a support chuck.
  • the support chuck is positioned within the bottom countersink of the container. A work roll is then moved radially inwardly to engage the outer annular wall of the container.
  • the container produced by the method of the present invention can be formed from a stock material, preferably an aluminum flat disc having a thickness of less than 0,0305 cm (0.0120 inch) and meet the minimum crush and buckle requirements of 1110 N (250 pounds) and 1,6 N/mm2 (90 psi), respectively.
  • the container which is formed from a flat metal disc, preferably aluminum, includes a bottom wall that has a thickness substantially equal to the thickness of the stock material and a reduced side wall thickness that is on the order of 1/3 the thickness of the stock material, with the bottom wall having a central inwardly-domed panel connected to the side wall through a countersink that has outer and inner, generally flat, substantially vertical walls.
  • the container that has been formed in accordance with known teachings has even more significantly improved performance characteristics by reforming the bottom end wall of the container from the initial configuration, as disclosed in the above-mentioned '582 patent.
  • the fluted container has been necked and flanged and has been internally spray coated and externally printed the bottom profile, more specifically the countersink or chime area of the bottom wall, is reshaped by reforming the inner wall of the countersink to further improve buckle resistance and decrease can growth.
  • This particular process would also allow further reduction in stock metal thickness without any change in the cut edge diameter of the initial disc.
  • the finished drawn and ironed container is supported in a suitable jig 150 that has an internal opening 152 which corresponds to the outer peripheral diameter of the container C.
  • the jig has a lower profile portion 154 that conforms to the countersink wall portion of the bottom wall of the container, as orginally formed in accordance with the process disclosed in the '582 patent.
  • a plug 156 is inserted into the upper end of the opening and securely held in the top of the container.
  • the bottom peripheral profile 154 of the jig 150 is in extended contact with the container bottom 137.
  • a reforming roller 160 is brought into engagement with the outside of the domed end 162 of the container and is supported on a shaft 164 that is designed to be rotated along an arcuate path around the center axis for the container C.
  • the roller has a peripheral configuration 166 which defines a substantially vertical upwardly and outwardly tapered wall having a generally arcuate upper portion 168 so that the inner wall 170 of the countersink is reformed to a more vertical profile while the dome 162 is stretched to a small degree.
  • the outer wall 172 is held to its original configuration. Alternatively, the outer wall could also be reformed with the inner wall.
  • the container produced according to the method and apparatus of the present invention has significantly less container growth during internal pressurization, and also has improved buckle resistance.
  • the container constructed in accordance with the present invention has been found to be capable of being produced from stock flat disc material having a significantly reduced thickness.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Prostheses (AREA)
  • Surgical Instruments (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)

Claims (6)

  1. Verfahren zum Fördern der Herstellung eines Behälters mit einer Längsachse und einer Seitenwand (129), die integral (einstückig) mit einem Boden (137), der einen mittleren gewölbten Bereich (162) aufweist, ausgebildet ist, und mit einer Einsenkung, die eine ringförmige, im wesentlichen längsgerichtete innere Wand (170) und eine ringförmige Außenwand (172) aufweist mit dem Schritt des Verformens des Bodens,
    gekennzeichnet durch
    Halten des Behälters in einem Futter (150), das einen Bodenumfangsprofilbereich (154) aufweist, der im wesentlichen der Form der ringförmigen Außenwand (172) des Behälters entspricht,
    Anpassen des Bodenumfangsprofilbereichs (154) des Futters (150) an die ringförmige Außenwand (172), und
    Inkontaktbringen einer Umformrolle (160) mit der inneren Wand (170), wobei die Umformrolle entlang der inneren Wand (170) und um einen bogenförmigen Weg in einer im wesentlichen radialen Ausrichtung mit der Anpassung des Futters (150) und der ringförmigen Außenwand (172) rotiert.
  2. Verfahren nach Anspruch 1, wobei die Umformrolle (160) um einen bogenförmigen weg mit gleichem Abstand zu der Längsachse rotiert.
  3. Verfahren nach Anspruch 1, bei dem die innere Wand (170) in eine senkrechtere Stellung umgeformt wird.
  4. Verfahren nach Anspruch 1, bei dem die Rolle (160) eine Umfangsausbildung (166) aufweist, die eine im wesentlichen vertikal nach oben und nach auswärts geschrägte Wand mit einem allgemein bogenförmigen Bereich (168) definiert.
  5. Vorrichtung zum Fördern der Herstellung eines Behälters mit einer Längsachse und einer Seitenwand (129), die integral (einstückig) mit einem Boden (137), der einen mittleren gewölbten Bereich (162) aufweist, ausgebildet ist, und mit einer Einsenkung, die eine ringförmige, im wesentlichen längsgerichtete innere Wand (170) und eine ringförmige Außenwand (172) aufweist durch Umformen des Bodens (137),
    gekennzeichnet durch
    ein Futter (150) mit einem Bodenumfangsprofilbereich (154), der in seiner Form im wesentlichen der ringförmigen Außenwand (172) des Behälters entspricht;
    Mittel zum Bringen einer Umformrolle (160) in Kontakt mit der inneren Wand (170),
    Mittel zum Rotieren der Umformrolle (160) entlang der inneren Wand (170) und um einen bogenförmigen Weg in einer im wesentlichen radialen Ausrichtung mit dem Bodenprofil (154) des Futters und der ringförmigen Außenwand (172).
  6. Vorrichtung nach Anspruch 5 mit Mitteln zum Rotieren der Umformrolle um einen bogenförmigen Weg mit gleichem Abstand zu der Achse des Behälters.
EP90907607A 1990-01-26 1990-01-26 Verfahren und vorrichtung zur herstellung von behältern Expired - Lifetime EP0512984B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PCT/US1990/000451 WO1991011275A1 (en) 1990-01-26 1990-01-26 Method and apparatus for processing containers
CA002074526A CA2074526C (en) 1990-01-26 1990-01-26 Method and apparatus for processing containers

Publications (2)

Publication Number Publication Date
EP0512984A1 EP0512984A1 (de) 1992-11-19
EP0512984B1 true EP0512984B1 (de) 1994-12-14

Family

ID=25675363

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90907607A Expired - Lifetime EP0512984B1 (de) 1990-01-26 1990-01-26 Verfahren und vorrichtung zur herstellung von behältern

Country Status (8)

Country Link
EP (1) EP0512984B1 (de)
JP (1) JP3149945B2 (de)
AT (1) ATE115447T1 (de)
AU (1) AU655754B2 (de)
CA (1) CA2074526C (de)
DE (1) DE69015210T2 (de)
ES (1) ES2066204T3 (de)
WO (1) WO1991011275A1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MX9101632A (es) * 1990-10-22 1992-06-05 Ball Corp Metodo y aparato para reforzar la base o fondo de un recipiente
US5261558A (en) * 1990-12-21 1993-11-16 Carnaudmetalbox Plc Can bodies
MY106990A (en) * 1990-12-21 1995-08-30 Metal Box Plc Containers
US5341667A (en) * 1992-05-01 1994-08-30 Reynolds Metals Company Container bottom wall reforming apparatus and method
GB9324910D0 (en) * 1993-12-04 1994-01-26 Metal Box Plc Containers
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
CA2807696C (en) 2010-08-20 2019-01-08 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
JP6043843B1 (ja) * 2015-08-10 2016-12-14 株式会社マジカル 梅食品保持具
CN118287592B (zh) * 2024-04-25 2024-09-20 山东省乐启新材料科技有限公司 一种罐体缩颈装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2039528A1 (de) 1970-08-08 1972-02-10 Alusuisse Verfahren und Vorrichtung zur Herstellung von Dosenunterteilen aus Blech
US4316375A (en) * 1979-11-30 1982-02-23 Reynolds Metals Company Apparatus for corrugating can body flanges
US4519232A (en) * 1982-12-27 1985-05-28 National Can Corporation Method and apparatus for necking containers
US4578976A (en) * 1984-04-09 1986-04-01 National Can Corporation Container processing apparatus
US4685582A (en) * 1985-05-20 1987-08-11 National Can Corporation Container profile with stacking feature
CH673790A5 (de) * 1987-07-07 1990-04-12 Elpatronic Ag
CH676210A5 (de) * 1988-07-19 1990-12-28 Elpatronic Ag

Also Published As

Publication number Publication date
CA2074526C (en) 2002-07-16
ATE115447T1 (de) 1994-12-15
JP3149945B2 (ja) 2001-03-26
WO1991011275A1 (en) 1991-08-08
AU655754B2 (en) 1995-01-12
AU5637190A (en) 1991-08-21
DE69015210D1 (de) 1995-01-26
EP0512984A1 (de) 1992-11-19
JPH05503878A (ja) 1993-06-24
DE69015210T2 (de) 1995-08-03
CA2074526A1 (en) 1991-07-27
ES2066204T3 (es) 1995-03-01

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