WO2012174058A1 - Methos and system for forming high - strength beverage can ends of aluminum magnesium alloy and such can ends - Google Patents
Methos and system for forming high - strength beverage can ends of aluminum magnesium alloy and such can ends Download PDFInfo
- Publication number
- WO2012174058A1 WO2012174058A1 PCT/US2012/042167 US2012042167W WO2012174058A1 WO 2012174058 A1 WO2012174058 A1 WO 2012174058A1 US 2012042167 W US2012042167 W US 2012042167W WO 2012174058 A1 WO2012174058 A1 WO 2012174058A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- degrees
- approximately
- inclined wall
- point
- wall angle
- Prior art date
Links
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
- B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
- B21D51/44—Making closures, e.g. caps
Definitions
- This application relates to metal packaging, and more particular to aluminum beverage can ends and seamed cans.
- the beverage can industry has specification for various parameters, such as a burst strength requirement of an average of 90 psi and a minimum of 85 psi.
- High strength beverage end shells formed in high speed, commercial production of an aluminum alloy having a specific range of constituents, especially magnesium within a specific range, are disclosed.
- a method of forming a high strength can end in commercial quantities comprises the steps of (i) providing from a coil a sheet of an aluminum alloy having between 3.0% and 4.5% magnesium; (ii) forming high strength beverage end shells from the aluminum alloy coil in a shell press operating at least at 180 strokes per minute to produce 4140 shells per minute; (iii) whereby, when the seamed can ends are fully aged, the aged ends satisfy a burst pressure specification of a minimum of at least 80 psi and an average of at least 90 psi.
- High strength ends include modern, commercially available ends and their variants.
- the aluminum alloy has between 3.5% and 4.5% magnesium.
- the ends may be configured such that the aged seamed ends satisfy a burst pressure specification of a minimum of at least 85 psi, especially wherein the burst pressure specification requires substantially all the aged seams end to satisfy the minimum burst pressure requirement and/or satisfaction of the burst pressure specification requires commercial acceptance by a beverage company.
- the structure of the shell includes a center panel, a cover hook, and an inclined wall located between the center panel and a peripheral curl, the inclined wall is inclined at an inclined wall angle of at least 20 degrees from vertical.
- the structure of the shell preferably includes a countersink bead extending between the center panel and the inclined wall.
- the inclined wall is a multipart wall that extends between the countersink bead and the peripheral curl.
- the inclined wall preferably includes an upper portion and a lower portion that are joined at a juncture, the upper portion is defined between a first point at an innermost point of the peripheral curl and the juncture, and the lower portion is defined between the juncture and a second point that is defined by an intersection of a horizontal projection from the plane of the center panel with the inclined wall or outer wall of the countersink bead.
- the inclined wall angle may be measured between the first point and the second point, such that a lower wall angle measured between the second point and the juncture is at least 28 degrees, preferably the inclined wall angle is between approximately 23 degrees and approximately 60 degrees and the lower wall angle is between approximately 32 degrees and approximately 55 degrees, and more preferably the inclined wall angle is between approximately 25 degrees and approximately 60 degrees and the lower wall angle is between approximately 34 degrees and approximately 53 degrees.
- the lower wall angle measured between the second point and the juncture preferably is at least 33 degrees.
- This inclined wall angle preferably is between approximately 23 degrees and approximately 60 degrees and the lower wall angle is between approximately 34 degrees and approximately 53 degrees.
- the present invention encompasses a system for manufacturing beverage end shells in commercial quantities from a coil of aluminum alloy sheet, comprising (i) a shell press operating at least at 180 strokes per minute producing at least 4140 beverage end shells per minute; (ii) each shell: including a center panel, a cover hook, and an inclined wall located between the center panel and a peripheral curl, the inclined wall is inclined at an inclined wall angle of at least 20 degrees from vertical; and is formed of an aluminum alloy having between 3.0% and 4.5% magnesium; (iii) whereby, when the seamed can ends are fully aged, the aged ends satisfy a burst pressure specification of a minimum of at least 80 psi and an average of at least 90 psi.
- the aluminum alloy has between 3.5% and 4.5% magnesium.
- the structure preferably includes a countersink bead extending between the center panel and the inclined wall.
- the inclined wall may be a multipart wall that extends between the countersink bead and the peripheral curl.
- the inclined wall includes an upper portion and a lower portion that are joined at a juncture, the upper portion is defined between a first point at an innermost point of the peripheral curl and the juncture, and the lower portion is defined between the juncture and a second point that is defined by an intersection of a horizontal projection from the plane of the center panel with the inclined wall or outer wall of the countersink bead.
- the inclined wall angle may be measured between the first point and the second point such that it is at least 28 degrees.
- the inclined wall angle is between approximately 23 degrees and approximately 60 degrees and the lower wall angle is between approximately 32 degrees and approximately 55 degrees. More preferably, the inclined wall angle is between approximately 25 degrees and approximately 60 degrees and the lower wall angle is between approximately 34 degrees and approximately 53 degrees.
- the lower wall angle measured between the second point and the juncture such preferably is at least 33 degrees.
- the inclined wall angle is between approximately 23 degrees and approximately 60 degrees and the lower wall angle is between approximately 34 degrees and approximately 53 degrees.
- the present invention also encompasses plural beverage can end shells formed in a commercial shell press operating at least at 180 strokes per minute and at least 4140 shells per minute.
- Each one of the plural shells comprises (i) a center panel, a cover hook, and an inclined wall located between the center panel and a peripheral curl, the inclined wall is inclined at an inclined wall angle of at least 20 degrees from vertical; (ii) the shell formed of an aluminum alloy having between 3.0% and 4.5% magnesium; (iii) whereby, when the seamed can ends are fully aged, the aged ends satisfy a burst pressure specification of a minimum of at least 80 psi and an average of at least 90 psi.
- the aluminum alloy has between 3.5% and 4.5% magnesium.
- the structure of the end shells preferably includes a countersink bead extending between the center panel and the inclined wall.
- the inclined wall may be a multipart wall that extends between the countersink bead and the peripheral curl.
- the inclined wall thus includes an upper portion and a lower portion that are joined at a juncture, the upper portion is defined between a first point at an innermost point of the peripheral curl and the juncture, and the lower portion is defined between the juncture and a second point that is defined by an intersection of a horizontal projection from the plane of the center panel with the inclined wall or outer wall of the countersink bead.
- the inclined wall angle may be measured between the first point and the second point.
- a lower wall angle may be measured between the second point and the juncture such that it is at least 28 degrees.
- the inclined wall angle is between approximately 23 degrees and approximately 60 degrees and the lower wall angle is between approximately 32 degrees and approximately 55 degrees. More preferably the inclined wall angle is between approximately 25 degrees and approximately 60 degrees and the lower wall angle is between approximately 34 degrees and approximately 53 degrees.
- the lower wall angle measured between the second point and the juncture may be at least 33 degrees.
- the inclined wall angle preferably is between approximately 23 degrees and approximately 60 degrees and the lower wall angle is between approximately 34 degrees and approximately 53 degrees.
- Figure 1 is a flow chart showing the shell making processes
- Figure 2 is a cross sectional diagram of an example high strength end shell.
- 5042 aluminum alloy is also widely widely used.
- 5042 aluminum has the following constituents:
- SuperEnd end shells can be made from 5042 alloy, even though the end shells would like end shells made from 0.0082 inch thick 5042 alloy have an average buckle pressure of only about 85 psi when aging is simulated by heating the seamed ends at 90 degrees C for 30 minutes. Buckle strength was determined by seaming aged ends onto cans, then pressurizing the can incrementally. A gauge records the pressure at the point of failure.
- 5182 alloy had the best combination of strength and ductility.
- 5182 alloy has proven to be sufficiently brittle such that the score about the tear panel would consistently propagate all the way around the tear panel.
- brittle material was a benefit to the opening process. Sufficiently brittleness to enhance opening has become even more important as the beverage industry has converged on large opening, oval ends, which inherently are more difficult to open compared with smaller, round opening ends.
- An aluminum alloy that the inventor surmises provides an optimum combination of ductility (that is, brittleness) for good score propagation, strength for burst pressure resistance, and cost by reducing the amount of magnesium and other elements that promote strength is provided by an aluminum alloy provided below:
- the magnesium content would be approximately 4.0 percent.
- a system 110 includes a conventional shell press 120 that includes multiple (conventional) tools for forming multiple shells 140 per stroke.
- Most commercial shell press machines operate at least at 180 strokes per minute and have a minimum of 23 or 24 tools such that each stroke produces shells at a rate of at least 4140 shells per minute.
- Shell press 120 may be any commercial press, such as produced by Stolle Machinery, Inc.
- Shells 140 are conveyed to a conventional conversion press, such as produced by Minter Machine Company, where a tab is applied.
- a first example of a high strength can end is a SuperEnd can end shell 10a, as provided by Crown Cork & Seal Company and shown in Figure 2. End shell 10a, a center panel 12a, a countersink bead 14a, an inclined wall 16a, and a peripheral curl 18a. Center panel 12a merges into inner wall 30a of the countersink bead 14a at a transition 30a.
- An arcuate bottom 34a extends downwardly from a lower portion of inner wall 30a.
- An outer wall 36a of bead 14 a extends upwardly from an outermost portion of bottom 34a.
- Wall 16a includes a lower wall 42a and an upper wall 44a. As shown in the figure, lower wall 42a extends from an uppermost portion of bead outer wall 34a and joins upper wall 44a at a juncture 46a.
- Peripheral curl 18a includes a seaming panel 60a and a cover hook 62a.
- a first point 48a is defined at the junction of the uppermost end of upper wall 44a with the innermost end of seaming panel 60a or peripheral curl 18a.
- a second point 50a is defined where a horizontal line L is extended from the plane of center panel 12a to intersect with wall 16a. For measuring other high strength end shells, the first point, juncture (if any), and second point may be defined as described above.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rigid Containers With Two Or More Constituent Elements (AREA)
- Apparatus For Making Beverages (AREA)
- Cookers (AREA)
- Distillation Of Fermentation Liquor, Processing Of Alcohols, Vinegar And Beer (AREA)
- Table Devices Or Equipment (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2012271811A AU2012271811A1 (en) | 2011-06-14 | 2012-06-13 | Methods and system for forming high-strength beverage can ends of aluminum magnesium alloy and such can ends |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201161496624P | 2011-06-14 | 2011-06-14 | |
US61/496,624 | 2011-06-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012174058A1 true WO2012174058A1 (en) | 2012-12-20 |
Family
ID=46319912
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2012/042167 WO2012174058A1 (en) | 2011-06-14 | 2012-06-13 | Methos and system for forming high - strength beverage can ends of aluminum magnesium alloy and such can ends |
Country Status (4)
Country | Link |
---|---|
US (1) | US20130008910A1 (en) |
AU (1) | AU2012271811A1 (en) |
SA (1) | SA112330612B1 (en) |
WO (1) | WO2012174058A1 (en) |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4448322A (en) * | 1978-12-08 | 1984-05-15 | National Can Corporation | Metal container end |
US5331836A (en) * | 1987-10-05 | 1994-07-26 | Reynolds Metals Company | Method and apparatus for forming can ends |
WO1995011099A1 (en) * | 1993-10-21 | 1995-04-27 | Stodd Ralph P | Apparatus for production of container shells |
WO1996037414A1 (en) * | 1995-05-24 | 1996-11-28 | Carnaudmetalbox Plc | Can end and method for fixing the same to a can body |
WO2001041948A2 (en) * | 1999-12-08 | 2001-06-14 | Metal Container Corporation | Can lid closure and method of joining a can lid closure to a can body |
US20030121920A1 (en) * | 2001-12-27 | 2003-07-03 | Zonker Harry R. | Metal end shell and easy opening can end for beer and beverage cans |
US7100789B2 (en) | 1999-12-08 | 2006-09-05 | Ball Corporation | Metallic beverage can end with improved chuck wall and countersink |
US7370774B2 (en) | 2002-04-22 | 2008-05-13 | Crown Cork & Seal Technologies | Can end |
US7591392B2 (en) | 2002-04-22 | 2009-09-22 | Crown Packaging Technology, Inc. | Can end |
US20100089116A1 (en) * | 2008-10-09 | 2010-04-15 | Container Development, Ltd. | Method and apparatus for forming a can shell |
US7819275B2 (en) | 2001-07-03 | 2010-10-26 | Container Development, Ltd. | Can shell and double-seamed can end |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3843014A (en) * | 1973-03-16 | 1974-10-22 | Pechiney Ugine Kuhlmann | Container cover |
GB9204972D0 (en) * | 1992-03-06 | 1992-04-22 | Cmb Foodcan Plc | Laminated metal sheet |
GB9702475D0 (en) * | 1997-02-07 | 1997-03-26 | Metal Box Plc | Can ends |
US5932798A (en) * | 1998-06-29 | 1999-08-03 | Sonoco Development, Inc. | Can strength and leakage test device |
US20030062370A1 (en) * | 1999-02-10 | 2003-04-03 | Ball Melville Douglas | Can with peelably bonded closure |
-
2012
- 2012-06-13 SA SA112330612A patent/SA112330612B1/en unknown
- 2012-06-13 WO PCT/US2012/042167 patent/WO2012174058A1/en active Application Filing
- 2012-06-13 US US13/495,250 patent/US20130008910A1/en not_active Abandoned
- 2012-06-13 AU AU2012271811A patent/AU2012271811A1/en not_active Abandoned
Patent Citations (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4448322A (en) * | 1978-12-08 | 1984-05-15 | National Can Corporation | Metal container end |
US5331836A (en) * | 1987-10-05 | 1994-07-26 | Reynolds Metals Company | Method and apparatus for forming can ends |
WO1995011099A1 (en) * | 1993-10-21 | 1995-04-27 | Stodd Ralph P | Apparatus for production of container shells |
WO1996037414A1 (en) * | 1995-05-24 | 1996-11-28 | Carnaudmetalbox Plc | Can end and method for fixing the same to a can body |
US6065634A (en) | 1995-05-24 | 2000-05-23 | Crown Cork & Seal Technologies Corporation | Can end and method for fixing the same to a can body |
WO2001041948A2 (en) * | 1999-12-08 | 2001-06-14 | Metal Container Corporation | Can lid closure and method of joining a can lid closure to a can body |
US7100789B2 (en) | 1999-12-08 | 2006-09-05 | Ball Corporation | Metallic beverage can end with improved chuck wall and countersink |
US7819275B2 (en) | 2001-07-03 | 2010-10-26 | Container Development, Ltd. | Can shell and double-seamed can end |
US20030121920A1 (en) * | 2001-12-27 | 2003-07-03 | Zonker Harry R. | Metal end shell and easy opening can end for beer and beverage cans |
US7370774B2 (en) | 2002-04-22 | 2008-05-13 | Crown Cork & Seal Technologies | Can end |
US7591392B2 (en) | 2002-04-22 | 2009-09-22 | Crown Packaging Technology, Inc. | Can end |
US20100089116A1 (en) * | 2008-10-09 | 2010-04-15 | Container Development, Ltd. | Method and apparatus for forming a can shell |
Also Published As
Publication number | Publication date |
---|---|
US20130008910A1 (en) | 2013-01-10 |
AU2012271811A1 (en) | 2013-05-02 |
SA112330612B1 (en) | 2015-07-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
AU2003207518B2 (en) | Metallic beverage can end with improved chuck wall and countersink | |
US10246218B2 (en) | Necked beverage can having a seamed-on end | |
EP3656482B1 (en) | End closure with coined panel radius and reform step | |
CN103237737A (en) | Bottle cap with reduced thickness specification | |
CA2872448C (en) | Metallic end closure with tear panel having improved rigidity | |
US9789992B2 (en) | Drawn and ironed aerosol can | |
JP2012192984A5 (en) | ||
WO2006036934A2 (en) | Container end closure | |
CN102834195A (en) | Can manufacture | |
TW202330954A (en) | Food or beverage can lid | |
US6425721B1 (en) | Method of forming a safety can end | |
CN104192411B (en) | A kind of manufacture method of bottle cap | |
WO2012174058A1 (en) | Methos and system for forming high - strength beverage can ends of aluminum magnesium alloy and such can ends | |
JP2023143990A (en) | can body | |
JP2016520026A (en) | Beverage can end having an arcuate panel wall and a curved transition wall | |
US20140197181A1 (en) | Three-piece can | |
JP2001294251A (en) | Metal container with cap and its manufacturing method | |
US11167906B2 (en) | Dome formation profile and method of lightweight container design and manufacture | |
CN220905659U (en) | Bowl and pot | |
JP6576047B2 (en) | Can lid | |
CN117000897A (en) | Method for manufacturing bowl-shaped packaging container by adopting metal sheet | |
CN117048976A (en) | Bowl and pot and preparation method thereof | |
JP4961253B2 (en) | Packaging container lid | |
KR20040059946A (en) | Manufacturing method for light weight high intensity steel two fiece drawing and ironing can | |
JP2016084144A (en) | Can end and can using the same |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12728357 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2012271811 Country of ref document: AU Date of ref document: 20120613 Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 12728357 Country of ref document: EP Kind code of ref document: A1 |