WO2025009331A1 - Élément de support de boîte de conserve, procédé de fabrication de boîte sans soudure et dispositif de fabrication associé - Google Patents

Élément de support de boîte de conserve, procédé de fabrication de boîte sans soudure et dispositif de fabrication associé Download PDF

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Publication number
WO2025009331A1
WO2025009331A1 PCT/JP2024/020899 JP2024020899W WO2025009331A1 WO 2025009331 A1 WO2025009331 A1 WO 2025009331A1 JP 2024020899 W JP2024020899 W JP 2024020899W WO 2025009331 A1 WO2025009331 A1 WO 2025009331A1
Authority
WO
WIPO (PCT)
Prior art keywords
support member
necking
chime
seamless
axial direction
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.)
Ceased
Application number
PCT/JP2024/020899
Other languages
English (en)
Japanese (ja)
Inventor
秀樹 弓削
猛 宮本
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.)
Toyo Seikan Co Ltd
Original Assignee
Toyo Seikan Co Ltd
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 Toyo Seikan Co Ltd filed Critical Toyo Seikan Co Ltd
Priority to CN202480037167.7A priority Critical patent/CN121240941A/zh
Publication of WO2025009331A1 publication Critical patent/WO2025009331A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
    • B21D45/06—Stripping-off devices
    • B21D45/08—Stripping-off devices interrelated with motion of tool
    • 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

Definitions

  • the present invention relates to a support member for can bodies used in the can manufacturing process, and more specifically, to a can support member that can support and fix the can body without causing deformation during the necking process in the manufacture of seamless cans, and a manufacturing method and manufacturing device that use this can support member.
  • Seamless cans formed by drawing and ironing processes are widely used as can bodies for storing beverages, food, etc., and there is a demand for thinner can bodies for these seamless cans to conserve resources and reduce weight.
  • the thickness of the aluminum alloy material is almost always 0.26 mm or less, and seamless cans made by drawing and ironing such thin metal sheets are prone to a decrease in pressure resistance, especially at the bottom, so various proposals have been made regarding the shape of the can bottom to provide higher pressure resistance.
  • Patent Document 1 listed below describes an aluminum seamless can having a bottom and a thin-walled body, the bottom of which is composed of a dome portion located in the center and bulging upward, a ground portion that descends from the periphery of the dome portion, and a chime portion that extends at an angle upward and outward from the ground portion and is connected to the lower end of the body portion.
  • Patent Document 2 listed below describes a seamless can in which, in order to improve the pressure resistance of the thinned bottom, an inner wall connected to the dome portion is formed with a first concave curved surface portion that is curved in a radially outward direction perpendicular to the can axis, and the dome portion is formed with a dome top located on the can axis, a second concave curved surface portion that is connected to the radially outward side of the dome top and has a concave curved shape with a smaller radius of curvature than the dome top, and a tapered portion that is located on the outer periphery of the dome portion, connects the first concave curved surface portion and the second concave curved surface portion, and is linearly tangent to the first concave curved surface portion and the second concave curved surface portion.
  • the upper part of the can body is forced into a necking tool for processing, so the can body is subjected to a large compressive load in the axial direction of the can. Therefore, in a thin-walled can body having a chime part as described in Patent Document 1, the chime part that is not supported by a support member may buckle due to the axial load applied to the contact part, and in particular in seamless cans formed by adjusting the shape of the inner peripheral wall of the annular convex part using bottom reforming as described in Patent Document 2 above, the outer peripheral wall (chime part) is also formed as a gently concave curved surface, making it even more susceptible to deformation due to necking.
  • the present invention provides a can support member for supporting and fixing a can body during a can manufacturing process, the can body being a seamless can having a body and a bottom, the bottom having a bottom shape including at least a grounding portion and a tapered chime portion that is connected from the grounding portion to the lower end of the body and has an outer diameter that increases upward in the axial direction of the can, and the can support member supports the grounding portion and the chime portion from the outside of the can.
  • the can support part includes a holding part that abuts against the grounding part to receive the bottom of the can, and an annular side wall that extends from a peripheral edge of the holding part and has an inner surface that abuts against the chime part, and a movable shaft that moves the can support part in the can axial direction.
  • a plurality of slits extending in the can axial direction from the upper end to the lower end of the annular side wall are formed in the annular side wall, and a stripper is provided on a stripper wheel to separate the can body from the can support without interfering with the slits.
  • the can body includes a dome portion protruding inwardly from the center of the bottom, and an inner circumferential wall extending downwardly in the can axial direction from an outer circumferential edge of the dome portion and curving inwardly in the can radial direction, and the grounding portion is located at a lower end of the inner circumferential wall and a lower end of the chime portion. is preferred.
  • the present invention also provides a method for producing seamless cans which includes at least a can body forming step and a necking step, characterized in that in the necking step, the necking process is carried out in a state in which the ground portion and the chime portion of the can bottom are supported and fixed from the outside of the can by a can support member.
  • a bottom reforming process before the necking process, in which a pressing body is inserted inside the can body and the bottom of the can body is pressed against the pressing body together with a molding die installed on the outer surface side of the can body, thereby curving the inner wall radially inwardly to form an annular curved end portion having a grounding portion.
  • the present invention further provides a seamless can manufacturing apparatus having at least a can body forming means, a necking means, and a conveying means connecting the respective means, characterized in that the necking means is equipped with a can support member capable of supporting and fixing the bottom of the can body conveyed from the conveying means, and the can support member is capable of supporting and fixing the grounding portion and chime portion of the can bottom from the outside of the can.
  • a plurality of slits are formed in the annular side wall of the can support member, and a stripper wheel is provided with a stripper that does not interfere with the slits. This allows the stripper to move relatively within the slits, and the upper end of the stripper is at the same position as or higher than the upper end of the annular side wall, making it possible to easily separate the can bodies from the can support member.
  • FIG. 1A and 1B are diagrams illustrating an example of a can support member of the present invention, in which (A) is a side cross-sectional view showing a state in which the can bottom is supported, and (B) is a perspective view.
  • 5A to 5C are diagrams illustrating the operation of the can support member of the present invention.
  • FIG. 2 is a partial perspective view for explaining an example of a necking step in the seamless can manufacturing apparatus of the present invention.
  • the bottom section 2 is formed with an annular grounding section 4, a dome section 6 that is recessed upward in the axial direction of the can from the grounding section 4 via an inner wall 5, and a tapered chime section 7 that connects from the grounding section 4 to the lower end of the body section 3 and has an outer diameter that increases upward in the axial direction of the can.
  • Can support member 10 is mounted on base 11 and comprises a drive shaft 12 movable in the can axial direction, and a can support part 13 mounted on the tip of drive shaft 12.
  • Can support part 13 comprises a retaining part 14 having a flat part 14a horizontal to the can axial direction that abuts against grounding part 4 at the can bottom, and an annular side wall 15 extending in the axial direction so as to surround the outer periphery of retaining part 14.
  • annular side wall 15 has an inner surface 15a that has a shape that substantially matches chime part 7 at the can bottom, and this inner surface 15a surrounds chime part 7 from the outside of the can, so that chime part 7 as a whole is supported and movement of can body 1 horizontal to the can axial direction is restricted.
  • the annular side wall 15 has three slits 16, 16...
  • the method for producing a seamless can of the present invention includes at least a can body forming step and a necking step, and an important feature of the necking step is that the necking process is performed with the above-mentioned can support member being used to support and fix the grounding portion and chime portion of the can bottom from the outside of the can. That is, as described above, by supporting the can body with the can support member of the present invention in the necking process, not only the grounding portion of the can bottom but also the chime portion is supported by a surface that matches the shape of the chime portion, so that even if a load is applied in the axial direction of the can body, deformation of the chime portion can be effectively prevented. Also, because the can body is supported in the axial and horizontal directions from the outside, the necking process can be performed while the can body is firmly supported and fixed without wobbling, so the necking process can be performed efficiently and reliably.
  • a pressing body is inserted into the can body and the bottom of the can body is pressed by a forming die installed on the outer surface side of the can body, thereby bending the inner peripheral wall inward in the can radial direction to form an annular curved end portion having a grounding portion.
  • the chime portion is also formed as a gently concave curved surface as well as the curved end portion, and has a shape that is prone to deformation during molding.
  • the can body when the can body is supported using the can support member of the present invention, even if the chime portion has such a shape, it has an annular side wall having an inner surface that matches the shape of the chime portion, so that deformation of the chime can be effectively suppressed even when the chime portion is subjected to necking processing.
  • the metal sheets constituting the seamless can may be any metal sheet that has been used in the past for seamless cans, such as surface-treated steel sheets and aluminum alloy sheets, but it is particularly preferable to use aluminum alloy sheets, which are easily deformed due to thinning.
  • These metal sheets may be resin-coated metal sheets that are coated with a thermoplastic resin such as polyester resin. When such resin-coated metal sheets are used, it is possible to omit the outer surface painting process and the inner surface painting process.
  • the necking means is provided with a can support member capable of supporting and fixing the bottom of the can body conveyed from the conveying means, and the can support member is a can support member capable of supporting and fixing the grounding portion and chime portion of the can bottom from the outside of the can.
  • Figure 3 is a diagram for explaining an example of the necking means in the manufacturing apparatus of the present invention, depicting one station of the necking process that is performed in multiple stages, and for ease of explanation, showing the state in which there is no can body and the drive shaft has moved to the necking tool side (the position when the can body undergoes the necking process).
  • the can support member is arranged so that the can axial direction is the up-down direction in the drawing, but as shown in Figure 3, the can support member may of course be installed in an apparatus in which the can axial direction is horizontal, and it goes without saying that this can be appropriately changed depending on the arrangement of each means in the manufacturing apparatus, the conveying method, etc.
  • a necking tool generally designated by 30, a star wheel 40 having a plurality of pockets 41 for holding the can body, three can support members 10, and a stripper wheel 50 for positioning the stripper 20 are provided.
  • the can support member 10 comprises a drive shaft 12 that can move in the can axial direction, and a can support part 13 attached to the tip of the drive shaft 12.
  • a flat part 14a of a holding part 14 of the can support part 13 supports the grounding part of the can bottom, and an inner surface 15a of an annular side wall 15 supports the chime part.
  • the structure of the can support member 10 is not limited to this, and the can support part 13 and the flat part 14a may be formed as a single part, or may be formed as a single part integrated with the drive shaft 12.
  • a hole 51 is formed in the stripper wheel 50 to allow the can support member 10 to be moved in the can axial direction, and the stripper 20 is attached to the periphery of this hole 51.
  • the stripper 20 is detachably attached to the stripper wheel 50 in Fig. 3, it may be formed integrally with the hole 51.
  • the stripper 20 is formed at a position that coincides with the slit 16 formed in the annular side wall 15 of the can support member 10 in the can axial direction, and is formed so as not to interfere with the slit 16 when the can support member 10 moves in the can axial direction. That is, when the stripper 20 moves relatively below the flat surface 14a as the can support member 10 moves upward in FIG. 2, the can body 1 is supported by the can support member 10, and the grounding portion is supported by the flat surface 14a of the can support portion 13. In this state, the upper opening portion of the can body 1 is pushed into the necking tool 30 by the can support member 10, and the necking process is performed.
  • the can body 1 is supported by the upper end surface of the stripper 20, and is in a state in which it can be separated from the can support member 10, and while being supported by the star wheel 40, it is transferred to the transfer star wheel (not shown) and is supplied to the next necking means.
  • the necking means is equipped with the above-mentioned can support member of the present invention
  • various means such as trimming means, cleaning means, printing means, necking means, and flanging means used in conventional seamless can manufacturing apparatuses can be employed as necessary.
  • the means for forming a can body, trimming means, cleaning means, printing means, bottom reforming means, necking means, and flange processing means are arranged in this order, and that a conveying means is provided between each means.
  • 1 seamless can, 2 bottom, 3 body, 4 grounding portion, 5 inner wall, 6 dome portion, 7 chime portion, 10 can support member, 11 base, 12 drive shaft, 13 can support portion, 14 holding portion, 15 annular side wall, 16 slit, 20 stripper, 30 necking tool, 40 star wheel, 50 stripper wheel.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)

Abstract

Est divulgué un élément de support de boîte de conserve servant à soutenir et à immobiliser un corps de boîte dans un processus de fabrication de boîte de conserve. Le corps de boîte est une boîte sans soudure comprenant une partie corps et une partie fond. La partie fond présente une forme de fond et comprend au moins une partie de contact avec le sol, et une partie rebord conique qui est continue avec la partie de contact avec le sol à une extrémité inférieure de la partie corps et présente un diamètre externe qui augmente en progressant vers le haut dans une direction d'axe de boîte. Le corps de boîte peut être soutenu et immobilisé sans provoquer de déformation de la partie rebord, par le soutien de la partie de contact avec le sol et de la partie rebord à partir du côté extérieur de la boîte.
PCT/JP2024/020899 2023-07-03 2024-06-07 Élément de support de boîte de conserve, procédé de fabrication de boîte sans soudure et dispositif de fabrication associé Ceased WO2025009331A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202480037167.7A CN121240941A (zh) 2023-07-03 2024-06-07 罐支撑部件、无缝罐的制造方法以及制造装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2023109509A JP2025007847A (ja) 2023-07-03 2023-07-03 缶支持部材、シームレス缶の製造方法及び製造装置
JP2023-109509 2023-07-03

Publications (1)

Publication Number Publication Date
WO2025009331A1 true WO2025009331A1 (fr) 2025-01-09

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PCT/JP2024/020899 Ceased WO2025009331A1 (fr) 2023-07-03 2024-06-07 Élément de support de boîte de conserve, procédé de fabrication de boîte sans soudure et dispositif de fabrication associé

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Country Link
JP (1) JP2025007847A (fr)
CN (1) CN121240941A (fr)
TW (1) TW202504826A (fr)
WO (1) WO2025009331A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04371332A (ja) * 1991-06-19 1992-12-24 Kuwabara Yasunaga シームレス缶の製造方法
JP2000503260A (ja) 1996-11-05 2000-03-21 アメリカン ナショナル カン カンパニー 容器にネックを形成するための食い違い配置されたダイ方法と装置
JP2002126841A (ja) * 2000-10-25 2002-05-08 Mitsubishi Materials Corp 缶保持装置
JP2016043991A (ja) 2014-08-20 2016-04-04 ユニバーサル製缶株式会社 缶
JP2016047541A (ja) * 2014-08-27 2016-04-07 ユニバーサル製缶株式会社 缶の製造方法、ボトムリフォーム機構及びこれに用いるトップ支持部材
WO2018070542A1 (fr) * 2016-10-13 2018-04-19 新日鐵住金株式会社 Procédé permettant de former un corps de canette en deux parties, dispositif permettant de former ce dernier et corps de canette en deux parties
JP2018099729A (ja) * 2016-12-20 2018-06-28 ユニバーサル製缶株式会社 缶の製造方法
JP2018177289A (ja) 2017-04-12 2018-11-15 東洋製罐株式会社 アルミシームレス缶

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04371332A (ja) * 1991-06-19 1992-12-24 Kuwabara Yasunaga シームレス缶の製造方法
JP2000503260A (ja) 1996-11-05 2000-03-21 アメリカン ナショナル カン カンパニー 容器にネックを形成するための食い違い配置されたダイ方法と装置
JP2002126841A (ja) * 2000-10-25 2002-05-08 Mitsubishi Materials Corp 缶保持装置
JP2016043991A (ja) 2014-08-20 2016-04-04 ユニバーサル製缶株式会社 缶
JP2016047541A (ja) * 2014-08-27 2016-04-07 ユニバーサル製缶株式会社 缶の製造方法、ボトムリフォーム機構及びこれに用いるトップ支持部材
WO2018070542A1 (fr) * 2016-10-13 2018-04-19 新日鐵住金株式会社 Procédé permettant de former un corps de canette en deux parties, dispositif permettant de former ce dernier et corps de canette en deux parties
JP2018099729A (ja) * 2016-12-20 2018-06-28 ユニバーサル製缶株式会社 缶の製造方法
JP2018177289A (ja) 2017-04-12 2018-11-15 東洋製罐株式会社 アルミシームレス缶

Also Published As

Publication number Publication date
CN121240941A (zh) 2025-12-30
JP2025007847A (ja) 2025-01-17
TW202504826A (zh) 2025-02-01

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