JP2508780B2 - Can body for two-piece can and its forming method - Google Patents
Can body for two-piece can and its forming methodInfo
- Publication number
- JP2508780B2 JP2508780B2 JP63001289A JP128988A JP2508780B2 JP 2508780 B2 JP2508780 B2 JP 2508780B2 JP 63001289 A JP63001289 A JP 63001289A JP 128988 A JP128988 A JP 128988A JP 2508780 B2 JP2508780 B2 JP 2508780B2
- Authority
- JP
- Japan
- Prior art keywords
- frustum
- piece
- rising
- forming
- diameter
- 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 - Fee Related
Links
- 238000000034 method Methods 0.000 title claims description 18
- 230000002093 peripheral effect Effects 0.000 claims description 29
- 229910000831 Steel Inorganic materials 0.000 claims description 20
- 239000010959 steel Substances 0.000 claims description 20
- 238000010409 ironing Methods 0.000 claims description 14
- 230000000630 rising effect Effects 0.000 claims description 14
- 238000000465 moulding Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 description 17
- 230000037303 wrinkles Effects 0.000 description 17
- 239000007769 metal material Substances 0.000 description 10
- 239000003973 paint Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000576 coating method Methods 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- 239000011253 protective coating Substances 0.000 description 4
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 229920002433 Vinyl chloride-vinyl acetate copolymer Polymers 0.000 description 2
- 238000010306 acid treatment Methods 0.000 description 2
- 235000013405 beer Nutrition 0.000 description 2
- 235000014171 carbonated beverage Nutrition 0.000 description 2
- 229920001577 copolymer Polymers 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920006334 epoxy coating Polymers 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229920001187 thermosetting polymer Polymers 0.000 description 2
- 239000005029 tin-free steel Substances 0.000 description 2
- 239000005028 tinplate Substances 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 239000002174 Styrene-butadiene Substances 0.000 description 1
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- MTAZNLWOLGHBHU-UHFFFAOYSA-N butadiene-styrene rubber Chemical compound C=CC=C.C=CC1=CC=CC=C1 MTAZNLWOLGHBHU-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- KYKAJFCTULSVSH-UHFFFAOYSA-N chloro(fluoro)methane Chemical compound F[C]Cl KYKAJFCTULSVSH-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 229910000423 chromium oxide Inorganic materials 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 210000003298 dental enamel Anatomy 0.000 description 1
- 238000003618 dip coating Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009503 electrostatic coating Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007761 roller coating Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000011115 styrene butadiene Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、ツーピース缶用缶胴及びその成形法に関す
るもので、より詳細には耐圧性に優れた底形状を有する
ツーピース缶用缶胴及び前記缶胴を強度の大きい金属原
料を用いてしわの発生なしに製造する方法に関する。Description: TECHNICAL FIELD The present invention relates to a can body for a two-piece can and a molding method thereof, and more specifically to a can body for a two-piece can having a bottom shape with excellent pressure resistance, and The present invention relates to a method for manufacturing a can body using a metal material having high strength without causing wrinkles.
（従来の技術） 金属素材をポンチとダイスとの間で絞り加工、或は更
にしごき加工に対して得られる缶体は、缶胴部及び缶胴
部と缶胴部との接続部に継目がなく、外観が良好で、底
蓋の巻締及び継目形成などの操作が不要であり、また缶
胴側壁部が薄肉化されていて、金属素材の量が少なくて
よい等の利点を有することから、飲料缶詰等の用途に広
く使用されている。(Prior Art) A can body obtained by drawing a metal material between a punch and a die or further ironing has a seam at a can body and a connecting portion between the body and the body. Since it has a good appearance, does not require operations such as tightening the bottom lid and forming seams, and has a thin side wall of the can body, it has the advantages that the amount of metal material can be small. Widely used for canned beverages, etc.
このようなツーピース缶は、ビール、炭酸飲料等の自
生圧力を有する内容物や、窒素充填缶詰等の用途に使用
されることから、耐圧性能が要求され、特に缶底部のバ
ックリングを防止するために、底部の外側から中心に向
けて、外周側台錐部分、突起部（缶底ラジアス部）、内
周側台錐部分及びこれに滑らかに接続されるドーム部を
形成させることが一般に行われている。Since such a two-piece can is used for contents such as beer, carbonated beverages, etc. having self-generated pressure, and for applications such as nitrogen-filled cans, pressure resistance is required, and in particular to prevent buckling of the bottom of the can. In general, the outer peripheral frustum portion, the protrusion (can bottom radius portion), the inner peripheral frustum portion, and the dome portion smoothly connected to the outer peripheral frustum portion are formed from the outside of the bottom portion toward the center. ing.
（発明が解決しようとする問題点） 近来、嗜好の変化により、炭酸飲料やビール等の内容
品においても、単位容積当りの炭酸ガスボリュームの比
率の高いものが好まれる傾向があり、窒素充填缶詰の用
途においても、充填性の容易さや保存性の点から窒素ボ
リュームの大きいものが望まれており、ツーピース缶用
缶胴に要求される耐圧性も、3kg/cm2（ゲージ）以上、
特に6kg/cm2（ゲージ）以上の高いレベルに達してい
る。(Problems to be solved by the invention) Recently, due to a change in taste, even in contents such as carbonated drinks and beer, those having a high ratio of carbon dioxide gas volume per unit volume tend to be preferred. In terms of ease of filling and storability, it is desired to have a large nitrogen volume, and the pressure resistance required for a can body for two-piece cans is 3 kg / cm 2 (gauge) or more.
In particular, it has reached a high level of 6 kg / cm 2 (gauge) or more.
ツーピース缶用缶胴の耐圧性、特に底部の耐圧性を向
上させるためには、引張り強度及び厚みの大きい金属素
材を用いること、及び前述した缶底の周状突起部（缶底
ラジアス部）の曲率半径（Ｒ）が小さくすることが有効
であるが、実際の缶底部の成形に際して、高強度材料を
使用する場合には、缶底の外周側台錐部分にしわが発生
する傾向が著しく大となり、外観不良を生じるばかりで
はなく、強いて成形操作を続行すると、加工部（ドーム
部）への材料供給が不十分となって、エッジ切れ等を生
じることになる。In order to improve the pressure resistance of the can body for two-piece cans, especially the pressure resistance of the bottom, use a metal material with a large tensile strength and thickness, and use the above-mentioned circumferential projection (can bottom radius) of the can bottom. It is effective to make the radius of curvature (R) small, but when using a high-strength material in the actual molding of the bottom of the can, the tendency for wrinkles to occur on the outer-side frustum portion of the can bottom becomes extremely large. Not only does the appearance become poor, but if the molding operation is continued by force, the material supply to the processed portion (dome portion) becomes insufficient, resulting in edge breakage or the like.
また、底部の周状突起部の先端の曲率半径（Ｒ）を小
さくしようとすると、内周側台錐部分でやはり材料切れ
を生じやすくなる。Further, if the radius of curvature (R) of the tip of the circumferential projection on the bottom is reduced, the material is likely to be cut at the inner-side frustum portion.
従って、本発明の目的は、高強度金属素材を用いて、
耐圧性に優れたツーピース缶用缶胴を成形するに際し生
ずる前記欠点を解消したツーピース缶用缶胴の成形法を
提供するにある。Therefore, an object of the present invention is to use a high strength metal material,
It is another object of the present invention to provide a method for forming a can body for a two-piece can that eliminates the above-mentioned drawbacks that occur when forming a can body for a two-piece can having excellent pressure resistance.
本発明の他の目的は、優れた耐圧強度及び耐バックリ
ング性を有するツーピース缶用缶胴並びに上記缶胴をし
わや材料切れの発生を抑制しつつ、良好な成形作業性を
もって製造しうる方法を提供するにある。Another object of the present invention is to provide a can body for a two-piece can having excellent pressure resistance and buckling resistance, and a method for producing the can body with good molding workability while suppressing the occurrence of wrinkles and material breakage. To provide.
（問題点を解決するための手段） 本発明によれば、内方円弧状の外周側台錐部分、接地
用突起部分、突起部分から急激に立上った立上り部分及
び立上り部分から滑らかに接続されたドーム部から成る
底形状を有するツーピース缶用缶胴の成形法において、 厚み（ｔ）が0.10mm以上0.20mm未満で、引張り強度
（σ）が50〜80kg/mm2である鋼板を絞り加工或いは絞り
−しごき加工に対して、前記突起部分の径よりも大きい
径の平底を有する缶胴に成形する工程と、 最終缶胴底部の外周側台錐部分及び突起部分に対応す
る形状を有する筒状パンチ及び支持リングで前記缶胴の
底部を成形し且つ支持しながら該筒状パンチの内径より
もやや小さい外径を有するドーミングダイと噛み合せて
接地用突起部分の先端部の曲率半径（Ｒ）が0.5mm以上
1.0mm未満となるように底部の絞り成形を行うことを特
徴とするツーピース缶用缶胴の成形法が提供される。(Means for Solving the Problems) According to the present invention, the outer-sided frustum portion having an inward arc shape, the grounding protrusion portion, the rising portion sharply rising from the protruding portion, and the smooth connection from the rising portion are connected. In a method of forming a can body for a two-piece can having a bottom shape consisting of a dome portion, a steel plate having a thickness (t) of 0.10 mm or more and less than 0.20 mm and a tensile strength (σ) of 50 to 80 kg / mm 2 is drawn. With respect to processing or drawing-ironing, a step of forming into a can body having a flat bottom whose diameter is larger than the diameter of the protruding part, and a shape corresponding to the outer peripheral side frustum part and the protruding part of the bottom part of the final can body While forming and supporting the bottom of the can body with the cylindrical punch and the support ring, the cylindrical punch and the supporting ring engage with a doming die having an outer diameter slightly smaller than the inner diameter of the cylindrical punch, and the radius of curvature (R ) Is 0.5 mm or more
There is provided a method for forming a can body for a two-piece can, which comprises forming the bottom by drawing so that the thickness is less than 1.0 mm.
本発明によればまた、厚み（ｔ）が0.10mm以上0.20mm
未満で、引張り強度（σ）が50〜80kg/mm2である鋼板の
絞り加工或いは絞り−しごき加工により形成され、底部
に、水平面からの平均傾斜角度（α）が１乃至80度の外
周側台錐部分、外周側台錐部分からの突出寸法（ｈ）が
０乃至3mmで且つ先端部の曲率半径（Ｒ）が0.5mm以上1.
0mm未満である突起部分、突起部分から急激に立上った
立上り部分及び立上り部分から滑らかに接続されたドー
ム部から成る底形状を形成させ且つ外周側台錐部分を内
方円弧状に形成させて成り、且つ底部が6.3kg/cm2以上
の耐圧強度を有することを特徴とするツーピース缶用缶
胴が提供される。According to the present invention, the thickness (t) is also 0.10 mm or more and 0.20 mm.
And a tensile strength (σ) of 50 to 80 kg / mm 2 is formed by drawing or drawing-ironing, and the bottom side has an average inclination angle (α) from the horizontal plane of 1 to 80 degrees on the outer peripheral side. The protrusion dimension (h) from the frustum portion and the outer peripheral frustum portion is 0 to 3 mm, and the radius of curvature (R) of the tip portion is 0.5 mm or more 1.
Form a bottom shape consisting of a protruding part that is less than 0 mm, a rising part that suddenly rises from the protruding part, and a dome part that is smoothly connected from the rising part, and form the outer side frustum part in an inward arc shape. A can body for a two-piece can, which is characterized in that the bottom has a pressure resistance of 6.3 kg / cm 2 or more.
（作用） 本発明によるツーピース缶用缶胴の全体の構造を示す
第１図において、この缶胴１は全体として２で示す筒状
の側壁部２と全体として３で示す缶底部３とから成って
いる。側壁部２の上部には所望により絞り込まれた１段
或は多段のネック部４を介して、缶蓋（図示せず）との
巻締のためのフランジ部５が設けられている。缶胴側壁
部２の側面及び側壁部２と缶底部３との接続部６には一
切継目が存在しないことが理解されるべきである。(Operation) In FIG. 1 showing the overall structure of a can body for a two-piece can according to the present invention, the can body 1 comprises a tubular side wall portion 2 generally designated by 2 and a can bottom portion 3 generally designated by 3. ing. A flange portion 5 is provided on the upper portion of the side wall portion 2 through a neck portion 4 of a single step or multiple steps, which is narrowed down as desired, for winding and fastening with a can lid (not shown). It should be understood that there are no seams on the sides of the can body side wall 2 and on the connection 6 between the side wall 2 and the can bottom 3.
缶底部３の断面構造を拡大して示す第２図において、
本発明による缶胴底部は、水平面からの平均傾斜角度
（α）が１乃至80度の外周側台錐部分10、外周側台錐部
分からの外方への突出寸法（ｈ）が０乃至3mmで且つ先
端部11の曲率半径（Ｒ）が0.5mm以上1.0mm未満である突
起部分12、前記突起部分からの急激に立上った立上り部
分（内周側台錐部分）13、及びこの立上り部分から滑ら
かに接続されたドーム部14から成っている。外周側台錐
部分10は第１図及び第２図に示すように内方円弧状に、
即ち内向きに凸の円弧状に形成されている。In FIG. 2 showing an enlarged sectional structure of the can bottom portion 3,
In the bottom of the can body according to the present invention, the outer peripheral frustum portion 10 having an average inclination angle (α) from the horizontal plane of 1 to 80 degrees, and the outward protruding dimension (h) from the outer peripheral frustum portion of 0 to 3 mm. And a radius of curvature (R) of the tip portion 11 is 0.5 mm or more and less than 1.0 mm, a rising portion (inner peripheral side frustum portion) 13 rising sharply from the protruding portion, and this rising. It consists of a dome part 14 that is smoothly connected from the parts. The outer peripheral frustum portion 10 has an inward arc shape as shown in FIGS. 1 and 2.
That is, it is formed in a circular arc shape that is convex inward.
本発明によれば、このような底形状のツーピース缶用
缶胴の成形に際して、厚み（ｔ）が0.10mm以上0.20mm未
満で、且つ引張り強度（σ）が50乃至80kg/mm2の高強度
薄板鋼板を用いることが第一の特徴である。ツーピース
缶用缶胴の底部における耐圧力は、底形状によって大き
く相違するが、底形状を同一とし、その因子を除外して
考慮した場合、経験上下記式 Ｐ＝ｋ・σ・tn ……（１） 式中、σは金属素材の引張り強度（kg/mm2）であり、
ｔは金属素材の厚み（mm）であり、Ｐは底の耐バックリ
ング圧力（kg/mm2）であり、ｎは１乃至２の数であり、
ｋは形状によって約0.4〜0.6の係数である。According to the present invention, in forming such a bottom-shaped can body for a two-piece can, a high strength having a thickness (t) of 0.10 mm or more and less than 0.20 mm and a tensile strength (σ) of 50 to 80 kg / mm 2 . The first feature is to use a thin steel plate. The withstand pressure at the bottom of the can body for two-piece cans varies greatly depending on the bottom shape, but if the bottom shape is made the same and the factors are excluded and considered, the following formula P = k · σ · t n empirically. (1) In the formula, σ is the tensile strength (kg / mm 2 ) of the metal material,
t is the thickness of the metal material (mm), P is the buckling resistance pressure (kg / mm 2 ) of the bottom, and n is a number from 1 to 2,
k is a coefficient of about 0.4 to 0.6 depending on the shape.
で表わされる。即ち、缶底部のバックリング変形は缶底
突起部（ラジアス部）が円周方向に引張り変形を受ける
ことによるものであり、金属素材の引張り強度（σ）の
増大は耐圧力の増大に有効に寄与し得ることがわかる。
本発明によれば、後述する実施例１に示すとおり、高強
度薄肉鋼板を使用しながら、63kg/cm2以上の耐圧強度が
得られる。Is represented by That is, the buckling deformation of the can bottom is due to the can bottom projection (radius) being subjected to tensile deformation in the circumferential direction, and an increase in the tensile strength (σ) of the metal material is effective in increasing the pressure resistance. It turns out that it can contribute.
According to the present invention, as shown in Example 1 which will be described later, a compressive strength of 63 kg / cm 2 or more can be obtained while using a high-strength thin steel plate.
ところで、本発明で規定した高強度薄板鋼板を第２図
に示すような底形状に直接成形しようとすると、外周側
台錐部分10にしわが発生する。このしわは、材料が円周
方向に圧縮される結果として径方向に配向した形状で生
ずる。このようなしわの発生は、従来のアルミ板のよう
な厚い素材や、厚手のブリキ板の場合には全く認められ
なかった現象である。By the way, when the high-strength thin steel plate specified in the present invention is directly formed into a bottom shape as shown in FIG. 2, wrinkles are generated in the outer peripheral frustum portion 10. This wrinkle occurs in a radially oriented shape as a result of the material being circumferentially compressed. The occurrence of such wrinkles is a phenomenon that was not observed at all in the case of a thick material such as a conventional aluminum plate or a thick tin plate.
本発明者等は、前記高強度薄板鋼板を素材として用い
る場合にも、直接底の外周側台錐部分を形成することな
しに、絞り加工或は絞り−しごき加工により一旦前記突
起部分11よりも大きい径の平底を有する缶胴に成形し、
最終缶胴底部の外周側台錐部分及び突起部分に対応する
形状を有する筒状パンチ及び支持リングで前記缶胴の底
部を成形し且つ支持しながら該筒状パンチの内径よりも
やや小さい外径を有するドーミングダイと噛み合せて底
部の絞り成形を行うことにより、外周側台錐部分におけ
るしわの発生を防止することに成功した。The inventors of the present invention, even when using the high-strength thin steel plate as a raw material, once form the protruding portion 11 by drawing or drawing-ironing without directly forming the outer peripheral trapezoidal part of the bottom. Molded into a can body with a large diameter flat bottom,
An outer diameter slightly smaller than the inner diameter of the cylindrical punch while molding and supporting the bottom of the can body with a supporting ring and a cylindrical punch having a shape corresponding to the outer peripheral frustum portion and the protruding portion of the bottom of the final can body. We succeeded in preventing the generation of wrinkles on the outer frustum of the outer periphery by engaging the doming die having the above and drawing the bottom.
本発明の製造工程を説明するための第３図の工程Ａに
おいて、上記高強度薄板鋼板20を、絞りポンチ21と絞り
ダイス22の組合せを用い、鋼板20をしわ押え23で押圧し
ながら、平底24を有する缶胴25に成形する。工程Ａは勿
論絞り成形に限定されるものでなく、絞りダイス22の代
わりに、しごきダイスを使用すると、絞りしごき加工を
受ける缶胴側壁部26が形成される。In step A of FIG. 3 for explaining the manufacturing process of the present invention, the high-strength thin steel plate 20 is flat-bottomed while pressing the steel plate 20 with a crease presser 23 using a combination of a drawing punch 21 and a drawing die 22. Mold into a can body 25 having 24. The step A is of course not limited to draw forming, and if an ironing die is used instead of the drawing die 22, the can body side wall portion 26 that is subjected to the drawing and ironing process is formed.
次いで、工程Ｂにおいて、最終缶胴底部の外周側台錐
部分10（第２図）及び突起部分12（第２図）の内面に対
応する形状の作用面27を有する筒状パンチ28、及び前記
外周側台錐部分10及び突起部分12の外面に対応する形状
の作用面29を有する支持リング30で缶胴の底部周辺部31
を挟持しながら、筒状パンチ28よりやや小さい外径を有
するドーミングダイ32と噛み合せる。Next, in step B, a cylindrical punch 28 having an action surface 27 having a shape corresponding to the inner surfaces of the outer peripheral frustum portion 10 (FIG. 2) and the protruding portion 12 (FIG. 2) of the bottom of the final can barrel, and A support ring 30 having a working surface 29 having a shape corresponding to the outer surfaces of the outer peripheral frustum portion 10 and the protruding portion 12 is provided with a bottom peripheral portion 31 of the can body.
While sandwiching it, it engages with a doming die 32 having an outer diameter slightly smaller than that of the cylindrical punch 28.
このような成形加工法を採用することにより筒状パン
チ28と支持リング30とにより、しわ発生方向（円周方
向）に直角方向の曲げが作用すると共に、両部材により
底部周辺部31にしわ押え力も作用してしわの発生が有効
に防止される。By adopting such a forming method, the cylindrical punch 28 and the support ring 30 bend at right angles in the wrinkle generating direction (circumferential direction), and both members press the wrinkle on the bottom peripheral portion 31. The force also acts to effectively prevent the generation of wrinkles.
外周側台錐部分を内方円弧状に成形することは、高強
度薄肉鋼板を用いる上で、しわの発生防止に有効であ
り、底の耐圧強度増大にも役立つ。Forming the frustum portion on the outer peripheral side into an inward arc shape is effective in preventing the occurrence of wrinkles when using a high-strength thin-walled steel plate, and also helps increase the pressure resistance of the bottom.
本発明において、αが上記範囲よりも大きくなると、
しわの発生する傾向があり、一方αが小さくなると耐圧
力が減少する傾向が見られる。一方、突起部先端のＲが
上記範囲よりも大きくなると耐圧力が小さくなる傾向が
あり、上記範囲よりも小さくなると、成形が困難となっ
たり、材料切れが生じる傾向がある。αは40乃至70度の
範囲にあることが特に望ましい。In the present invention, when α is larger than the above range,
Wrinkles tend to occur, while on the other hand, as α becomes smaller, the proof pressure tends to decrease. On the other hand, if R of the tip of the protrusion is larger than the above range, the pressure resistance tends to be small, and if it is smaller than the above range, molding tends to be difficult or material breakage tends to occur. It is particularly desirable that α is in the range of 40 to 70 degrees.
（発明の好適態様） 本発明で用いる高強度薄板鋼板としては、前述した強
度を有する各種表面処理鋼板を使用し得る。本発明によ
れば高強度鋼板を用いることにより、缶胴の厚みを小さ
くでき、これに伴って素材の節約及び容器の軽量化を行
うことができる。(Preferable Aspects of the Invention) As the high-strength thin steel sheet used in the present invention, various surface-treated steel sheets having the above-described strength can be used. According to the present invention, by using a high-strength steel plate, the thickness of the can body can be reduced, and accordingly, the material can be saved and the weight of the container can be reduced.
表面処理鋼板としては、冷圧延鋼板を焼鈍後、二次冷
間圧延し、亜鉛メッキ、錫メッキ、ニッケルメッキ、電
解クロム酸処理、クロム酸処理等の表面処理鋼板の一種
又は二種以上行ったものを用いることができる。好適な
表面処理鋼板の一例は、電解クロム酸処理鋼板であり、
特に10乃至200mg/m2の金属クロム層と１乃至50mg/m
2（金属クロク換算）のクロム酸化物層とを備えたもの
であり、このものは塗膜密着性と耐腐食性と組合せに優
れている。表面処理鋼板の他の例は、0.5乃至11.2g/m2
の錫メッキ量を有する硬質ブリキ板である。As the surface-treated steel sheet, after cold-rolled steel sheet is annealed, secondary cold rolling is performed, and one or more surface-treated steel sheets such as zinc plating, tin plating, nickel plating, electrolytic chromic acid treatment, and chromic acid treatment are performed. Any thing can be used. An example of a suitable surface-treated steel sheet is an electrolytic chromic acid-treated steel sheet,
Especially 10 to 200 mg / m 2 metallic chromium layer and 1 to 50 mg / m 2
It is provided with a chromium oxide layer of 2 (metal black conversion), which is excellent in combination with coating film adhesion and corrosion resistance. Another example of surface treated steel sheet is 0.5 to 11.2 g / m 2
Is a hard tin plate having an amount of tin plating.
本発明に用いる鋼板の厚みは、容器の大きさによって
相違し、一概に規定することができないが、一定のサイ
ズの缶で比較して、従来の成形法に比して素材の厚みを
５乃至40％、特に10乃至38％に節約できる。The thickness of the steel sheet used in the present invention differs depending on the size of the container and cannot be specified unconditionally, but compared with a can of a certain size, the thickness of the material is 5 to 5 as compared with the conventional forming method. Savings of 40%, especially 10-38%.
本発明で用いる高強度薄板鋼板には成形に先立って予
め保護塗膜を形成させておくこともできるし、また成形
後に保護塗膜を設けることもできる。The high-strength thin steel sheet used in the present invention may be preliminarily formed with a protective coating film prior to forming, or may be provided with a protective coating film after forming.
保護塗料としては、熱硬化性及び熱可塑性樹脂から成
る任意の保護塗料；例えばフェノール・エポキシ樹脂、
アミノ−エポキシ塗料等の変性エポキシ塗料；例えば塩
化ビニル−酢酸ビニル共重合体、塩化ビニル−酢酸ビニ
ル共重合体部分ケン化物、塩化ビニル−酢酸ビニル−無
水マレイン酸共重合体、エポキシ変性−，エポキシアミ
ノ変性−或はエポキシフェノール変性−ビニル樹脂塗料
等のビニル又は変性ビニル塗料；アクリル樹脂系塗料；
スチレン−ブタジエン系共重合体等の合成ゴム系塗料等
の単独又は２種以上の組合せが使用される。As the protective coating, any protective coating composed of thermosetting and thermoplastic resins; for example, phenol / epoxy resin,
Modified epoxy coating such as amino-epoxy coating; vinyl chloride-vinyl acetate copolymer, partially saponified vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinyl acetate-maleic anhydride copolymer, epoxy modified-, epoxy Amino-modified or epoxyphenol-modified vinyl or modified vinyl paint such as vinyl resin paint; acrylic resin paint;
A synthetic rubber-based coating material such as a styrene-butadiene-based copolymer may be used alone or in combination of two or more.
これらの塗料は、エナメル或はラッカー等の有機溶媒
溶液の形で、或は水性分散液又は水溶液の形で、ローラ
塗装、スプレー塗装、浸漬塗装、静電塗装、電気泳動塗
装等の形で金属素材に施す。勿論、前記樹脂塗料が熱硬
化性の場合には、必要により塗料を焼付ける。また絞り
−しごき加工を行う場合には、加工後のカップにスプレ
ー塗布等の手段で、前記塗料を缶胴に施す。勿論、加工
前と加工後との二段階で塗料を施すこともできる。These paints are in the form of an organic solvent solution such as enamel or lacquer, or in the form of an aqueous dispersion or aqueous solution, in the form of roller coating, spray coating, dip coating, electrostatic coating, electrophoretic coating, etc. Apply to the material. Of course, when the resin paint is thermosetting, the paint is baked if necessary. In the case of squeezing and ironing, the paint is applied to the can body by spray coating or the like on the processed cup. Of course, the coating can be applied in two stages, before and after processing.
これら有機塗膜は腐食防止及び加工性向上の見地か
ら、一般に２乃至３μｍ、特に３乃至20μｍの厚み（乾
燥状態）を有することが望ましい。From the viewpoint of preventing corrosion and improving workability, these organic coatings preferably have a thickness (dry state) of generally 2 to 3 μm, particularly 3 to 20 μm.
本発明においては、絞り加工は、所望の形状及び所望
の高さ／径比率となるまで、ポンチ及びダイスの径を段
々小さくしながら、数次にわたって絞り加工を行う。In the present invention, the drawing is carried out for several orders while gradually reducing the diameters of the punch and the die until the desired shape and the desired height / diameter ratio are obtained.
この際、下記式 で定義される絞り比を、一段の絞り加工で1.20乃至2.1
0、特に1.30乃至1.90となるように、また全体としての
絞り比を、1.50乃至3.00、特に1.80乃至2.70となるよう
に行うことが望ましい。At this time, the following equation The drawing ratio defined by 1.
It is desirable to set the aperture ratio to 0, particularly 1.30 to 1.90, and the overall aperture ratio to 1.50 to 3.00, particularly 1.80 to 2.70.
また側壁部にしごき加工を行う場合には、下記式 で定義されるしごき率が一段で10乃至50％、特に15乃至
45％、及び全体として40乃至80％、特に45乃至75％とな
るように行うのがよい。When ironing the side wall, The ironing rate defined by is 10 to 50%, especially 15 to
45%, and 40 to 80% as a whole, preferably 45 to 75%.
本発明による缶底部加工に際しては、通常のポンチを
用いて絞り成形或は絞り−しごき成形を行い、次いでポ
ンチを第３図Ｂに示すものに差替えて底形成を行うこと
ができる。In the processing of the bottom of the can according to the present invention, draw forming or draw-ironing forming can be performed using a normal punch, and then the punch can be replaced with that shown in FIG. 3B to form the bottom.
しかしながら、第４図Ａ及びＢに示される通り、筒状
パンチ部材として同軸上に配置された外周部材40と内周
部材41との組合せを用い、絞り成形或は絞り−しごき成
形工程Ａでは、内周部材41を後退させた状態で外周部材
40のみをポンチとして使用し、底形成工程Ｂでは内周部
材41を前進させた状態で、外周部材40と内周部材41とが
最終缶胴底部の外周側台錐部分及び突起部分の内面に対
応する作用面が形成される状態で底形成を行う。このよ
うな底形成法を用いることにより、ワンストロークで絞
り乃至絞り−しごき成形と底形成とを行うこができる。However, as shown in FIGS. 4A and 4B, the combination of the outer peripheral member 40 and the inner peripheral member 41 arranged coaxially as a cylindrical punch member is used, and in the draw forming or the draw-ironing forming step A, Outer peripheral member with inner peripheral member 41 retracted
Only 40 is used as a punch, and in the bottom forming step B, the inner peripheral member 41 is advanced, and the outer peripheral member 40 and the inner peripheral member 41 are attached to the inner surfaces of the outer peripheral frustum portion and the protruding portion of the bottom of the final can body. The bottom is formed with the corresponding working surface formed. By using such a bottom forming method, drawing or drawing-ironing forming and bottom forming can be performed with one stroke.
成形後のカップ体は、トリミングを行った後、必要に
応じ、それ自体公知の脱脂操作、例えば湯洗浄、溶剤洗
浄、フロンガス洗浄等に付した後、以後の製缶操作に付
する。The molded cup body is trimmed and, if necessary, subjected to a degreasing operation known per se, for example, hot water cleaning, solvent cleaning, chlorofluorocarbon cleaning, and the like, and then subjected to a subsequent can manufacturing operation.
（発明の効果） 本発明によれば、高強度金属素材を用いて、優れた耐
圧強度及び耐バックリング性を有する底部を備えたツー
ピース缶用缶胴をしわの発生や板切れを生じることなし
に製造することができた。また、高強度金属素材を用い
ることにより、板厚を減少させながら耐圧性を向上さ
せ、更に板厚の減少により素材の節約及び容器の軽量化
が可能となった。(Effect of the Invention) According to the present invention, a can body for a two-piece can having a bottom portion having excellent pressure resistance and buckling resistance is formed using a high-strength metal material without causing wrinkles or plate breakage. Could be manufactured. Further, by using a high-strength metal material, it is possible to improve the pressure resistance while reducing the plate thickness, and it is possible to save the material and reduce the weight of the container by reducing the plate thickness.
（実施例） 実施例１ 素材厚0.18mm及び引張り強度63kg/mm2のティンフリー
スチール（DR−９）を径187mmの円板に打抜き、常法に
従い絞りポンチと絞りダイスとの間で、絞り・再絞りを
行い内径65.95mmの平底のコップ状に成形した。(Example) Example 1 Tin-free steel (DR-9) having a material thickness of 0.18 mm and a tensile strength of 63 kg / mm 2 was punched into a disk having a diameter of 187 mm and drawn between a drawing punch and a drawing die according to a conventional method.・ Re-drawing was performed to form a flat-bottomed cup with an inner diameter of 65.95 mm.
次いで、このコップ状成形物を底形状成形工具（第３
図）すなわち筒状底部成形ポンチと支持リングとドーミ
ングダイにより底部成形を行った。支持リングはエアク
ッションにより上向きの力で支持されており、その支持
力は約4tonである。その結果、外周側台錐部分はもとよ
りその他のいずれの部分にもしわの発生がなく、且つ破
断は皆無であった。底形状を形成したコップは凹部を半
径46mmの球面とし、ボトムシンク11.2mm、ドーム径48.7
mm、傾斜角（α）40゜、接地部内面側先端半径（Ｒ）0.
7mm、外周側台錐部分は第１図のように内方円弧状であ
る。この底形状の耐圧強度は6.3kg/cm2以上を示した。Then, this cup-shaped molded product is formed into a bottom-shaped molding tool (3rd
Fig.) That is, bottom molding was performed using a cylindrical bottom molding punch, a support ring, and a doming die. The support ring is supported by the air cushion with an upward force, and the support force is about 4 tons. As a result, no wrinkles were formed in any of the outer frustum portion and the other portions, and there was no breakage. The cup with the bottom shape has a concave spherical surface with a radius of 46 mm, a bottom sink of 11.2 mm and a dome diameter of 48.7.
mm, Inclination angle (α) 40 °, Tip radius on the inner surface of the contact area (R) 0.
7 mm, the frustum portion on the outer peripheral side has an inward arc shape as shown in FIG. The pressure resistance of this bottom shape was 6.3 kg / cm 2 or more.
比較例１ 素材厚0.18mmのティンフリースチール（DR−９）を径
187mmの円板に打抜き、常法に従い絞りポンチと絞りダ
イスとの間で、絞り・再絞りを行い内径79mmの平底のコ
ップを成形し、次いで第５図の如く、先端に最終的な底
形状に対応した形状を持った径約66mmの再絞りポンチに
より再絞りを行った。その結果、再絞り行程のごとく初
期段階でテーパー部42にしわが発生した。Comparative Example 1 Tin-free steel (DR-9) with a material thickness of 0.18 mm
It is punched into a 187 mm disc, and it is squeezed and redrawn between the drawing punch and drawing die according to the usual method to form a flat-bottomed cup with an inner diameter of 79 mm, and then the final bottom shape at the tip as shown in Fig. 5. Re-drawing was performed by using a re-drawing punch with a diameter of about 66 mm corresponding to the above. As a result, wrinkles were generated in the tapered portion 42 in the initial stage as in the redrawing process.
引き続き、底形状成形工具第５図44,45により底成形
を行ったところ、既に発生したしわによりドーム部に材
料が流れ込むのが妨げられ、接地部先端近傍より破断が
生じ、成形不能となった。以下の底加工の方法は素板厚
0.3mm程度の加工性に優れる調質材又はこれに相当する
金属板において可能な一般に行われる方法であり、更に
薄肉の高強度材には適用不可能なものである。Subsequently, when bottom molding was performed using the bottom shape molding tool (Fig. 44, 45), the wrinkles that had already occurred prevented the material from flowing into the dome portion, causing breakage from the vicinity of the tip of the grounding portion, making molding impossible. . The method of bottom processing below is the blank thickness
This is a generally performed method that can be applied to a tempered material having a workability of about 0.3 mm or a metal plate equivalent to this, and cannot be applied to a thin high-strength material.
比較例２ 実施例１において、接地部内面が先端半径（Ｒ）を1.
0mmにする点以外は実施例１と同様にして絞り再絞り缶
を成形した。この缶の底の耐圧強度は5.8kg/cm2であっ
た。Comparative Example 2 In Example 1, the inner surface of the ground contact portion has a tip radius (R) of 1.
A drawn and redrawn can was molded in the same manner as in Example 1 except that the thickness was 0 mm. The pressure resistance of the bottom of this can was 5.8 kg / cm 2 .
第１図は、本発明のツーピース缶用缶胴の全体の構造を
示すものであり、第２図は、第１図の缶底部３の断面構
造を拡大して示すものであり、第３図（Ａ）及び（Ｂ）
及び第４図（Ａ）及び（Ｂ）は本発明の製造工程を説明
するための図であり、第５図は比較例１の製造工程を説
明するための図である。 １……缶胴、２……側壁部、３……缶底部、４……ネッ
ク部、10……外周側台錐部分、12……突起部分、14……
ドーム部、21……絞りポンチ、22……絞りダイス、23…
…しわ押え、28……筒状パンチ、30……支持リング、32
……ドーミングダイ。FIG. 1 shows an overall structure of a can body for a two-piece can of the present invention, and FIG. 2 shows an enlarged sectional structure of a can bottom portion 3 of FIG. 1, and FIG. (A) and (B)
4A and 4B are diagrams for explaining the manufacturing process of the present invention, and FIG. 5 is a diagram for explaining the manufacturing process of Comparative Example 1. 1 ... Can body, 2 ... Side wall part, 3 ... Can bottom part, 4 ... Neck part, 10 ... Perimeter frustum part, 12 ... Projection part, 14 ...
Dome part, 21 …… Aperture punch, 22 …… Aperture die, 23…
… Wrinkle retainer, 28… Cylindrical punch, 30… Support ring, 32
…… Dorming die.
Claims (2)
部分、突起部分から急激に立上った立上り部分及び立上
り部分から滑らかに接続されたドーム部から成る底形状
を有するツーピース缶用缶胴の成形法において、 厚み（ｔ）が0.10mm以上0.20mm未満で、引張り強度
（σ）が50〜80kg/mm2である鋼板を絞り加工或いは絞り
−しごき加工に付して、前記突起部分の径よりも大きい
径の平底を有する缶胴に成形する工程と、 最終缶胴底部の外周側台錐部分及び突起部分に対応する
形状を有する筒状パンチ及び支持リングで前記缶胴の底
部を成形し且つ支持しながら該筒状パンチの内径よりも
やや小さい外径を有するドーミングダイと噛み合せて接
地用突起部分の先端部の曲率半径（Ｒ）が0.5mm以上1.0
mm未満となるように底部の絞り成形を行うことを特徴と
するツーピース缶用缶胴の成形法。1. A two-piece bottom piece having an inward arcuate outer-sided frustum portion, a grounding protrusion portion, a rising portion abruptly rising from the protrusion portion, and a dome portion smoothly connected from the rising portion. In the method of forming a can body for cans, a steel plate having a thickness (t) of 0.10 mm or more and less than 0.20 mm and a tensile strength (σ) of 50 to 80 kg / mm 2 is subjected to a drawing process or a drawing-ironing process, Forming the can body having a flat bottom with a diameter larger than the diameter of the protruding portion, and the can body with a cylindrical punch and a supporting ring having a shape corresponding to the outer peripheral frustum portion and the protruding portion of the bottom portion of the final can body. The radius of curvature (R) of the tip of the grounding protrusion is 0.5 mm or more 1.0 by engaging with a doming die having an outer diameter slightly smaller than the inner diameter of the cylindrical punch while molding and supporting the bottom of the cylindrical punch.
A method of forming a can body for a two-piece can, which comprises drawing the bottom so that the diameter is less than mm.
張り強度（σ）が50〜80kg/mm2である鋼板の絞り加工或
いは絞り−しごき加工により形成され、底部に、水平面
からの平均傾斜角度（α）が１乃至80度の外周側台錐部
分、外周側台錐部分からの突出寸法（ｈ）が０乃至3mm
で且つ先端部の曲率半径（Ｒ）が0.5mm以上1.0mm未満で
ある突起部分、突起部分から急激に立上った立上り部分
及び立上り部分から滑らかに接続されたドーム部から成
る底形状を形成させ且つ外周側台錐部分を内方円弧状に
形成させて成り、且つ底部が6.3kg/cm2以上の耐圧強度
を有することを特徴とするツーピース缶用缶胴。 2. A steel sheet having a thickness (t) of 0.10 mm or more and less than 0.20 mm and a tensile strength (σ) of 50 to 80 kg / mm 2 is formed by drawing or drawing-ironing, and a bottom is formed from a horizontal plane. Of the outer peripheral frustum with an average inclination angle (α) of 1 to 80 degrees, and the protruding dimension (h) from the outer frustum of the outer circumference is 0 to 3 mm
A bottom shape consisting of a protruding portion having a radius of curvature (R) of 0.5 mm or more and less than 1.0 mm, a rising portion sharply rising from the protruding portion, and a dome portion smoothly connected from the rising portion A can body for a two-piece can, characterized in that the outer side frustum portion is formed in an inward arc shape, and the bottom portion has a pressure resistance strength of 6.3 kg / cm 2 or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63001289A JP2508780B2 (en) | 1988-01-08 | 1988-01-08 | Can body for two-piece can and its forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63001289A JP2508780B2 (en) | 1988-01-08 | 1988-01-08 | Can body for two-piece can and its forming method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01178325A JPH01178325A (en) | 1989-07-14 |
| JP2508780B2 true JP2508780B2 (en) | 1996-06-19 |
Family
ID=11497296
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63001289A Expired - Fee Related JP2508780B2 (en) | 1988-01-08 | 1988-01-08 | Can body for two-piece can and its forming method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2508780B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100527148B1 (en) * | 2003-05-03 | 2005-11-09 | 고기목 | Molding method for a support unit in a vessel of compressor |
| US8313003B2 (en) | 2010-02-04 | 2012-11-20 | Crown Packaging Technology, Inc. | Can manufacture |
| JP2013518723A (en) | 2010-02-04 | 2013-05-23 | クラウン パッケイジング テクノロジー インコーポレイテッド | Can manufacturing |
| JP5435123B2 (en) * | 2010-03-05 | 2014-03-05 | 山一電機株式会社 | Non-contact connector |
| BR112012024685A2 (en) | 2010-04-12 | 2016-06-07 | Crown Packaging Technology Inc | method of making a metal cup, apparatus for making a meta cup, container body and container |
| AU2011239981B2 (en) * | 2010-04-13 | 2016-08-11 | Crown Packaging Technology, Inc. | Can manufacture |
| CN107052189B (en) * | 2017-06-14 | 2018-11-02 | 奥瑞金科技股份有限公司 | The processing method of metal can |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55163138A (en) * | 1979-05-31 | 1980-12-18 | Yoshizaki Kozo | Drawn and squeezed pressureeresisting can |
| JPS61178333U (en) * | 1985-04-26 | 1986-11-07 | ||
| US4723433A (en) * | 1986-01-28 | 1988-02-09 | Adolph Coors Company | Method and apparatus for doming can bottoms |
-
1988
- 1988-01-08 JP JP63001289A patent/JP2508780B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01178325A (en) | 1989-07-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0099907B1 (en) | Method of forming containers | |
| US5105645A (en) | Method of redrawing metal cup | |
| US3730383A (en) | Container body and a method of forming the same | |
| TW495398B (en) | Bottle-shaped can manufacturing method, and forming tool | |
| US3693828A (en) | Seamless steel containers | |
| JPH0327828A (en) | Method for forming can barrel for two piece can | |
| US5014536A (en) | Method and apparatus for drawing sheet metal can stock | |
| US5351852A (en) | Base profile for a drawn container | |
| US5048317A (en) | Method of manufacturing draw-formed container | |
| EP0542552B1 (en) | Thickness-reduced draw-formed can | |
| JPH0771700B2 (en) | Redrawing method | |
| JP2513379B2 (en) | Drawing method for organic coated metal materials | |
| JPH0757387B2 (en) | Thinning squeezer | |
| US4485663A (en) | Tool for making container | |
| KR890002739B1 (en) | Container | |
| US4412440A (en) | Process for making container | |
| JP2508780B2 (en) | Can body for two-piece can and its forming method | |
| JPH09285832A (en) | Seamless can and its forming method | |
| US4646930A (en) | Bottom profile for a seamless container body | |
| US5083449A (en) | Method of redrawing flanged cup | |
| GB2092932A (en) | Improved tooling for making container bodies | |
| JPH0759326B2 (en) | Redrawing method of flanged cup | |
| US5263354A (en) | Drawn can body methods, apparatus and products | |
| JPH06102465B2 (en) | Can body for two-piece can and its manufacturing method | |
| US5199596A (en) | Drawn can body methods, apparatus and products |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |