US20130098926A1 - Can manufacture - Google Patents

Can manufacture Download PDF

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Publication number
US20130098926A1
US20130098926A1 US13/452,464 US201213452464A US2013098926A1 US 20130098926 A1 US20130098926 A1 US 20130098926A1 US 201213452464 A US201213452464 A US 201213452464A US 2013098926 A1 US2013098926 A1 US 2013098926A1
Authority
US
United States
Prior art keywords
cup
base
draw
container
punch
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.)
Abandoned
Application number
US13/452,464
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English (en)
Inventor
Stuart Monro
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.)
Crown Packaging Technology Inc
Original Assignee
Crown Packaging Technology Inc
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 Crown Packaging Technology Inc filed Critical Crown Packaging Technology Inc
Assigned to CROWN PACKAGING TECHNOLOGY, INC. reassignment CROWN PACKAGING TECHNOLOGY, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MONRO, STUART
Priority to US13/651,833 priority Critical patent/US20130037555A1/en
Publication of US20130098926A1 publication Critical patent/US20130098926A1/en
Assigned to DEUTSCHE BANK AG NEW YORK BRANCH, AS COLLATERAL AGENT reassignment DEUTSCHE BANK AG NEW YORK BRANCH, AS COLLATERAL AGENT SECURITY AGREEMENT Assignors: CROWN PACKAGING TECHNOLOGY, INC.
Priority to US14/540,513 priority patent/US20150283597A1/en
Assigned to SIGNODE INDUSTRIAL GROUP LLC, CROWN PACKAGING TECHNOLOGY, INC. reassignment SIGNODE INDUSTRIAL GROUP LLC RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: DEUTSCHE BANK AG NEW YORK BRANCH
Abandoned 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
    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/24—Deep-drawing involving two drawing operations having effects in opposite directions with respect to the blank
    • 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
    • B21D22/30—Deep-drawing to finish articles formed by 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
    • B21D25/00—Working sheet metal of limited length by stretching, e.g. for straightening
    • 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
    • B21D25/00—Working sheet metal of limited length by stretching, e.g. for straightening
    • B21D25/04—Clamping arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material
    • B65D1/12—Cans, casks, barrels, or drums
    • B65D1/14—Cans, casks, barrels, or drums characterised by shape
    • B65D1/16—Cans, casks, barrels, or drums characterised by shape of curved cross-section, e.g. cylindrical
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material
    • B65D1/12—Cans, casks, barrels, or drums
    • B65D1/14—Cans, casks, barrels, or drums characterised by shape
    • B65D1/16—Cans, casks, barrels, or drums characterised by shape of curved cross-section, e.g. cylindrical
    • B65D1/165—Cylindrical cans

Definitions

  • This invention relates to the production of metal cups and in particular (but without limitation) to metal cups suitable for the production of “two-piece” metal containers.
  • a flat (typically) circular blank stamped out from a roll of metal sheet is drawn though a drawing die, under the action of a punch, to form a shallow first stage cup.
  • This initial drawing stage does not result in any intentional thinning of the blank.
  • the cup which is typically mounted on the end face of a close fitting punch or ram, is pushed through one or more annular wall-ironing dies for the purpose of effecting a reduction in thickness of the sidewall of the cup, thereby resulting in an elongation in the sidewall of the cup.
  • the ironing process will not result in any change in the nominal diameter of the first stage cup.
  • FIG. 1 shows the distribution of metal in a container body resulting from a conventional DWI (D&I) process.
  • FIG. 1 is illustrative only, and is not intended to be precisely to scale. Three regions are indicated in FIG. 1 :
  • the same drawing technique is used to form the first stage cup.
  • the first stage cup is then subjected to one or more re-drawing operations which act to progressively reduce the diameter of the cup and thereby elongate the sidewall of the cup.
  • most conventional re-drawing operations are not intended to result in any change in thickness of the cup material.
  • the container body is typically made by drawing a blank into a first stage cup and subjecting the cup to a number of re-drawing operations until arriving at a container body of the desired nominal diameter, then followed by ironing the sidewall to provide the desired sidewall thickness and height.
  • DWI (D&I) and DRD processes employed on a large commercial scale have a serious limitation in that they do not act to reduce the thickness (and therefore weight) of material in the base of the cup.
  • drawing does not result in reduction in thickness of the object being drawn, and ironing only acts on the sidewalls of the cup.
  • the thickness of the base remains broadly unchanged from that of the ingoing gauge of the blank. This can result in the base being far thicker than required for performance purposes.
  • the metal packaging industry is fiercely competitive, with weight reduction being a primary objective because it reduces transportation and raw material costs.
  • weight reduction being a primary objective because it reduces transportation and raw material costs.
  • around 65% of the costs of manufacturing a typical two-piece metal food container derive from raw material costs.
  • cup-section and “cup” are used interchangeably.
  • a method for manufacture of a metal cup from a metal sheet comprising the following operations:
  • a press for manufacture of a metal cup from a metal sheet comprising:
  • the method and apparatus of the different aspects of the invention have the advantage (over known processes/apparatus) of achieving manufacture of a cup having a base which is thinner than the ingoing gauge of the metal sheet, without requiring loss or waste of metal. This is achieved by use of a single press, thereby simplifying the manufacturing process.
  • the invention When applied to the manufacture of two-piece containers, the invention enables cost savings to be made of the order of several dollars per 1,000 containers relative to existing manufacturing techniques.
  • the base of the drawn cup is clamped sufficiently to restrict or prevent metal flow from the clamped region into the enclosed portion during the stretching operation. If the clamping loads are insufficient, material from the clamped region (or from outside of the clamped region) would merely be drawn into the enclosed portion, rather than the enclosed portion (and the cup's base) undergoing any thinning It has been found that stretching and thinning can still occur when permitting a limited amount of flow of material from the clamped region (or from outside of the clamped region) into the enclosed portion, i.e. when metal flow is restricted rather than completely prevented.
  • the method and apparatus of the invention is particularly suitable for use in the manufacture of metal containers, with the final resulting cup being used for the container body.
  • the final resulting cup may be formed into a closed container by the fastening of a closure to the open end of the cup.
  • a metal can end may be seamed to the open end of the final resulting cup.
  • typically the cup resulting from the method of the invention would be subjected to either or a combination of a re-drawing operation and an ironing operation.
  • the re-drawing operation may comprise one or more stages, each stage having the effect of inducing a staged reduction in cup diameter.
  • the ironing operation would have the benefit of increasing the height of the sidewall of the cup produced by the method and apparatus of the invention.
  • the stretching operation comprises deforming and stretching at least part of the base that lies within the enclosed portion into a domed profile.
  • the base of the container body In the field of metal containers for carbonated beverages, it is common for the base of the container body to be inwardly-domed to resist pressure generated by the product.
  • the “dome” provided by the method and apparatus of the invention may serve as the inwardly-domed region of a beverage container body.
  • the cup would undergo a later reforming operation to provide the domed base of the cup with a desired final profile necessary to resist in-can pressure.
  • the method of the invention is suitable for use on cups that are both round and non-round in plan. However, it works best on round cups.
  • the graph also shows the effect of reducing the thickness of the top and mid-wall sections of the container in driving down the cost curve.
  • FIG. 3 shows the same graph based upon actual data for UK-supplied tinplate of the type commonly used in can-making.
  • 0.285 mm represents the optimum thickness on cost grounds, with the use of thinner gauge material increasing net overall costs for can production.
  • the graph of FIG. 3 shows the percentage increase in overall cost per 1,000 cans when deviating from the 0.285 mm optimum ingoing gauge thickness.
  • the final resulting cup of the invention has the benefits of a thinner (and therefore lighter) base.
  • the “metal sheet” can include a blank cut from a larger expanse of metal sheet.
  • annular clamping or clamping an “annular region” is meant that the base of the drawn cup is clamped either continuously or at spaced intervals in an annular manner.
  • the clamping element may be in the form of a continuous annular sleeve; alternatively, it may be a collection of discrete clamping elements distributed in an annular manner to act against the metal sheet.
  • the method and apparatus of the invention are not limited to a particular metal. They are particularly suitable for use with any metals commonly used in DWI (D&I) and DRD processes. Also, there is no limitation on the end use of the cup that results from the method and apparatus of the invention. Without limitation, the cups may be used in the manufacture of any type of container, whether for food, beverage or anything else.
  • FIG. 1 is a side elevation view of a container body of the background art resulting from a conventional DWI process. It shows the distribution of material in the base and sidewall regions of the container body.
  • FIG. 2 is a graph showing in general terms how the net overall cost of manufacturing a typical two-piece metal container varies with the ingoing gauge of the sheet metal. The graph shows how reducing the thickness of the sidewall region (e.g. by ironing) has the effect of driving down the net overall cost.
  • FIG. 3 is a graph corresponding to FIG. 2 , but based on actual price data for UK-supplied tinplate.
  • FIG. 4 is a cross-section through a press of the invention showing a blank of metal sheet prior to the drawing and stretching operations.
  • FIG. 5 is a cross-section through the press of FIG. 4 , but after the drawing operation to draw the blank of metal sheet into a cup having a sidewall and integral base.
  • FIG. 6 is a cross-section through the press of FIGS. 4 and 5 , but after the stretching operation to deform and stretch the base of the drawn cup.
  • FIG. 4 shows a combined drawing and stretching press 10 .
  • a blank of metal sheet 5 is “slidably clamped” in position between the opposing surfaces of a draw pad 11 and an end face of a draw die 12 .
  • a draw punch 13 is located above the upper surface of the blank of metal sheet 5 Within the bore defined by the draw die 12 is a stretch punch 14 which is radially-inwards of and surrounded by annular clamping element 15 .
  • the draw punch 13 is moved axially downwards (along axis 16 ) until the peripheral annular region 17 of the end face of the punch contacts a corresponding region on the blank 5 (see FIG. 5 ).
  • the draw punch 13 is urged downwards through the bore of the draw die 12 to progressively draw the initially planar blank 5 into a cup 30 having a sidewall 31 and integral base 32 .
  • slidably clamping is meant that the clamping load during drawing is selected so as to permit the metal sheet 5 to slide, relative to whatever clamping means is used (in this case a “draw pad 11 ”), in response to the deforming action of the draw punch 13 /draw die 12 on the metal sheet.
  • a clamping means in this case a “draw pad 11 ”
  • An intention of this slidable clamping is to prevent or restrict wrinkling of the material during drawing.
  • annular clamping element 15 is moved axially upwards until an annular region 33 on the base 32 of the drawn cup is clamped between the annular clamping element and the peripheral annular region 17 of the end face of the draw punch 13 (see FIG. 5 ).
  • the material of the cup's base enclosed by this annular clamping is referred to as the “enclosed portion” 34 .
  • Stretch punch 14 is then moved axially upwards (along axis 16 ) to contact the enclosed portion 34 (see FIG. 6 ).
  • the stretch punch 14 is urged upwards into the recess 18 defined within the end face of the draw punch 13 to progressively deform and stretch the material of the enclosed portion 34 of the cup 30 into a domed profile 35 (see FIG. 6 ).
  • the clamping load applied between the annular clamping element 15 and the peripheral annular region 17 of the end face of the draw punch 13 is sufficient to restrict or prevent metal flow from the clamped annular region 33 into the enclosed portion 34 during this stretching operation.
  • the end face of the annular clamping element 15 may be textured (not shown in the figures) to thereby allow use of a reduced clamping load compared to use of an annular clamping element having a smooth polished end face.
  • the cup that results from the stretching operation performed in press 10 has a reduced thickness in its base relative to the ingoing gauge of the blank of metal sheet 5 .
  • this cup may be used as a container body, but would generally be subjected to either or a combination of redrawing and ironing operations to optimise the cup diameter and sidewall thickness.
  • the domed region 35 may be particularly beneficial for containers intended for pressurised products, such as carbonated beverages.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Stackable Containers (AREA)
  • Laminated Bodies (AREA)
US13/452,464 2010-04-13 2012-04-20 Can manufacture Abandoned US20130098926A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US13/651,833 US20130037555A1 (en) 2010-04-13 2012-10-15 Can manufacture
US14/540,513 US20150283597A1 (en) 2010-04-13 2014-11-13 Can Manufacture

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP10159826.6 2010-04-13
EP10159826 2010-04-13
PCT/EP2011/055847 WO2011128385A1 (en) 2010-04-13 2011-04-13 Can manufacture

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/055847 Continuation WO2011128385A1 (en) 2010-04-13 2011-04-13 Can manufacture

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US13/651,833 Continuation US20130037555A1 (en) 2010-04-13 2012-10-15 Can manufacture

Publications (1)

Publication Number Publication Date
US20130098926A1 true US20130098926A1 (en) 2013-04-25

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Application Number Title Priority Date Filing Date
US13/452,464 Abandoned US20130098926A1 (en) 2010-04-13 2012-04-20 Can manufacture
US13/651,833 Abandoned US20130037555A1 (en) 2010-04-13 2012-10-15 Can manufacture
US14/540,513 Abandoned US20150283597A1 (en) 2010-04-13 2014-11-13 Can Manufacture

Family Applications After (2)

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US13/651,833 Abandoned US20130037555A1 (en) 2010-04-13 2012-10-15 Can manufacture
US14/540,513 Abandoned US20150283597A1 (en) 2010-04-13 2014-11-13 Can Manufacture

Country Status (14)

Country Link
US (3) US20130098926A1 (enExample)
EP (1) EP2558229A1 (enExample)
JP (1) JP5952804B2 (enExample)
CN (1) CN102834195A (enExample)
AU (1) AU2011239981B2 (enExample)
BR (1) BR112012026177A2 (enExample)
CA (1) CA2794120C (enExample)
CO (1) CO6630100A2 (enExample)
MX (1) MX2012011886A (enExample)
NZ (1) NZ603524A (enExample)
RU (1) RU2567077C2 (enExample)
UA (1) UA112058C2 (enExample)
WO (1) WO2011128385A1 (enExample)
ZA (1) ZA201208514B (enExample)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018165429A1 (en) * 2017-03-08 2018-09-13 Ball Corporation Apparatus and method for redrawing a cup with a reformed bottom
US10239648B2 (en) 2014-10-28 2019-03-26 Ball Metalpack, Llc Apparatus and method for forming a cup with a reformed bottom
US10315242B2 (en) 2014-10-15 2019-06-11 Ball Metalpack, Llc Apparatus and method for simultaneously forming a contoured shoulder and neck portion in a closed end of a metallic container

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US10525519B2 (en) 2009-10-21 2020-01-07 Stolle Machinery Company, Llc Container, and selectively formed cup, tooling and associated method for providing same
GB201205243D0 (en) 2012-03-26 2012-05-09 Kraft Foods R & D Inc Packaging and method of opening
GB2511560B (en) 2013-03-07 2018-11-14 Mondelez Uk R&D Ltd Improved Packaging and Method of Forming Packaging
GB2511559B (en) 2013-03-07 2018-11-14 Mondelez Uk R&D Ltd Improved Packaging and Method of Forming Packaging
GB201306765D0 (en) * 2013-04-12 2013-05-29 Crown Packaging Technology Inc Method and apparatus for manufacturing a can end
KR101929643B1 (ko) * 2014-03-28 2018-12-14 신닛테츠스미킨 카부시키카이샤 복수의 두께 증가 부분을 갖는 판상 성형체의 제조 방법 및 복수의 두께 증가부를 갖는 판상 성형체
US20170267408A1 (en) * 2015-12-21 2017-09-21 Bill Martinez Dry Cup
US10286437B2 (en) * 2016-02-04 2019-05-14 Crown Packaging Technology, Inc. Anti-wrinkling tooling assembly for a can bodymaker
PL3219402T3 (pl) 2016-03-15 2020-05-18 Can - Pack S.A. Sposób kształtowania wytłoczek do wytwarzania opakowań
CN106216552A (zh) * 2016-07-22 2016-12-14 苏玲 金属罐的制造方法
JP2019534789A (ja) * 2016-10-06 2019-12-05 ストール マシーナリ カンパニー, エルエルシーStolle Machinery Company, LLC 容器、及び選択的に形成されるカップ、ツーリング、並びにこれらを提供する関連方法
US12472548B2 (en) * 2020-09-02 2025-11-18 Jfe Steel Corporation Pressed component manufacturing method, die designing method, die shape designing device, and die
CN116490297A (zh) * 2020-12-01 2023-07-25 麦格纳国际公司 波状部轧辊模具组件

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US3760751A (en) * 1971-10-29 1973-09-25 Pittsburh Aluminum Container body and a method of forming the same
GB2103134A (en) * 1981-08-07 1983-02-16 American Can Co Improvements relating to the drawing and ironing of cans
US4732031A (en) * 1987-04-20 1988-03-22 Redicon Corporation Method of forming a deep-drawn and ironed container
JPH01178325A (ja) * 1988-01-08 1989-07-14 Ueno Hiroshi ツーピース缶用缶胴の成形法
US5605069A (en) * 1995-04-12 1997-02-25 Ball Corporation Beverage container with wavy transition wall geometry and method for producing the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10315242B2 (en) 2014-10-15 2019-06-11 Ball Metalpack, Llc Apparatus and method for simultaneously forming a contoured shoulder and neck portion in a closed end of a metallic container
US10239648B2 (en) 2014-10-28 2019-03-26 Ball Metalpack, Llc Apparatus and method for forming a cup with a reformed bottom
WO2018165429A1 (en) * 2017-03-08 2018-09-13 Ball Corporation Apparatus and method for redrawing a cup with a reformed bottom

Also Published As

Publication number Publication date
RU2012148040A (ru) 2014-05-20
EP2558229A1 (en) 2013-02-20
RU2567077C2 (ru) 2015-10-27
JP5952804B2 (ja) 2016-07-13
WO2011128385A1 (en) 2011-10-20
AU2011239981A1 (en) 2012-11-29
NZ603524A (en) 2013-10-25
MX2012011886A (es) 2012-11-30
CN102834195A (zh) 2012-12-19
UA112058C2 (uk) 2016-07-25
US20150283597A1 (en) 2015-10-08
CA2794120C (en) 2018-04-03
ZA201208514B (en) 2013-09-25
US20130037555A1 (en) 2013-02-14
CA2794120A1 (en) 2011-10-20
CO6630100A2 (es) 2013-03-01
AU2011239981B2 (en) 2016-08-11
JP2013523460A (ja) 2013-06-17
BR112012026177A2 (pt) 2016-06-28

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