JPS6352721A - Manufacture of can shell - Google Patents
Manufacture of can shellInfo
- Publication number
- JPS6352721A JPS6352721A JP19562586A JP19562586A JPS6352721A JP S6352721 A JPS6352721 A JP S6352721A JP 19562586 A JP19562586 A JP 19562586A JP 19562586 A JP19562586 A JP 19562586A JP S6352721 A JPS6352721 A JP S6352721A
- Authority
- JP
- Japan
- Prior art keywords
- diameter
- thickness
- open end
- shell
- forming
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 238000000034 method Methods 0.000 claims description 26
- 238000010409 ironing Methods 0.000 abstract description 11
- 230000037303 wrinkles Effects 0.000 abstract description 5
- 239000000463 material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 238000007796 conventional method Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000004826 seaming Methods 0.000 description 1
- 235000019640 taste Nutrition 0.000 description 1
- 239000005028 tinplate Substances 0.000 description 1
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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/005—Processes combined with methods covered by groups B21D1/00 - B21D31/00 characterized by the material of the blank or the workpiece
- B21D35/006—Blanks having varying thickness, e.g. tailored blanks
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は有底筒状の缶胴の開口端部に缶胴径よりｌ」＼
径の縮径部を備える飲料缶などに用いる缶胴の製造方法
に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention provides a method for attaching a cylindrical can body with an open end portion that is l'
The present invention relates to a method for manufacturing a can body used for a beverage can or the like having a diameter-reduced portion.
（従来の技術）
近年、金属製飲料缶などにおいて、趣味感の多様化によ
り変形缶が多用さｎるようになって来た。(Prior Art) In recent years, deformed metal cans have come into widespread use due to the diversification of tastes.
その一種として缶胴の開口端側に向って缶胴径より小径
の縮径部を備えるツーぎ−スの変形缶は知らｎている。As one type of such can, a deformed Zugis can is known, which has a reduced diameter portion having a smaller diameter than the can body diameter toward the open end side of the can body.
このツーピースの変形缶の製造方法としては、−！ず第
５図Ａ示のように第１工程で例えばアルミニウム材のよ
うな金属薄板を円形状に打抜きして缶胴材ａを形成する
。The manufacturing method for this two-piece deformed can is -! First, as shown in FIG. 5A, in the first step, a thin metal plate, such as an aluminum material, is punched out into a circular shape to form a can body material a.
次に第２工程で第５図Ｂ示のように絞りポンチと絞りダ
イスとから成る缶胴成型装置（図示せず）を用いて板状
の缶胴材ａに絞り加工を施して、径が比較的大径で、高
さが低い有底筒状体すを成形する。更に第３工程で第５
図Ｃ示のように缶胴成型装置（図示せず）を用いて有底
筒状体すに深絞り加工を施して、径が比較的小径で高さ
が高い有底筒状体Ｃを成形する。続いて第４工程で第５
図り示のようにしごきポンチとしごきダイスとから成る
しごき加工装置（図示せず）を用いて有底筒状体Ｃの胴
部ｄに数回のしごき加工を施して胴部ｄより厚い肉厚部
ｅを有する開口端部ｆｉ備える有底筒状の缶胴ｇ ｆｓ
−成形し１次いで開口端部「の端縁ｆｘ に第５図り
の点線水のようにトリミング加工を施して所定高さｈの
缶胴ｇｅ得る。更に第５工程で第５図Ｅ示のように絞込
加工装置（図示せず）を用いて缶胴ｇの開口端部ｆに絞
込加工′ｆ！：施して缶胴径ｉより小径の胴径ｊを有す
る縮径部ｋを成形すると共に、フランジ加工を施してフ
ランジ部ｔを成形するものである。そして、この缶胴ｇ
の開口端部ｆＶＣ縮径部ｋを形成する際の絞込加工時に
おける缶胴ｇの床底防止、およびフランジ部ｔ’に形成
する際のフランジ加工時におけるフランジ部ｔ Ｓｌｌ
ｌｌ上のために、第４工程でのしごき加工の際に第５図
り示のように開口端部ｆの厚さ１１を胴部ｄの厚さｔ２
に比して相当肉厚となるように形成するものである。Next, in the second step, as shown in FIG. 5B, the plate-shaped can body material a is drawn using a can body forming device (not shown) consisting of a drawing punch and a drawing die to reduce the diameter. To form a bottomed cylindrical body with a relatively large diameter and low height. Furthermore, in the third step, the fifth
As shown in Figure C, deep drawing is performed on the bottomed cylindrical body using a can body forming device (not shown) to form a bottomed cylindrical body C with a relatively small diameter and high height. do. Next, in the fourth step, the fifth
As shown in the figure, the body d of the bottomed cylindrical body C is ironed several times using an ironing device (not shown) consisting of an ironing punch and an ironing die, so that the thickness is thicker than that of the body d. A cylindrical can body g fs with a bottom and an open end fi having a portion e.
- After forming, the edge fx of the opening end is trimmed as shown in the dotted line in Figure 5 to obtain a can body with a predetermined height h.Furthermore, in the fifth step, as shown in Figure 5E, The opening end f of the can body g is subjected to a drawing process 'f!: using a drawing device (not shown) to form a reduced diameter part k having a body diameter j smaller than the can body diameter i. At the same time, flange processing is performed to form the flange portion t.Then, this can body g
To prevent the bottom of the can body g during the drawing process when forming the open end fVC of the reduced diameter part k, and to prevent the bottom of the can body g during the flange process when forming the flange part t'.
ll, during the ironing process in the fourth step, the thickness 11 of the open end part f is changed to the thickness t2 of the body part d, as shown in the fifth diagram.
It is formed to have a considerably thicker wall than the one shown in FIG.
しか１７ながら、前記しごき加工に続く縮径部ｆを形成
するための絞込加工の際、絞込加工装置の工具の開口端
部ｆへの絞込みにより第５図Ｅ示のように該開口端部ｆ
の厚さはその最下端部分子′ではほとんど変化はないが
缶／ｌｉ＋−１ｇの開口端側に向って次第に厚みを増し
／ｌ最下端部分子′の厚さｔｌに対Ｕ２て最上端部分子
ｕの厚さ會３は更に厚く形成さｎる。However, during the drawing process to form the reduced diameter part f following the ironing process, the tool of the drawing device draws the opening end f, as shown in FIG. 5E. Part f
The thickness of U2 remains almost unchanged at the bottom end of the molecule, but gradually increases in thickness toward the open end of the can/li+-1g. The thickness of the child u is formed to be even thicker.
特に缶胴ｇの開口端部ｆに縮径部ｋを形成する際の絞込
加工量が多い程、即ち缶胴径ｉと縮径部の胴径ｊとの差
が顕著の場合は開口端部ｆの最上端部分子“の厚さの増
加が著しいう従って前記方法によって製造さＴ＃−た缶
胴ｇは絞込加工時の座屈変形やフランジ成形時のフラン
ジ割ｆ等の問題もなく加工を行うことができるが、縮径
部にの厚さが缶胴ｇの開口端側に向って次第に厚くなり
、縮径前の比較的肉厚の当該部がなお一層肉厚となるた
め縮径部にしわが発生しやすく外観を損うという問題が
ある。またその改良のため或は材料を減らしコストダウ
ンをはかるため開口端部ｆの肉厚ｔ＋ｆｆｉ薄くすると
、しわ等は改善さで、るが、絞込加工時に座屈変形等が
発生し好ましくない。In particular, the larger the amount of narrowing when forming the reduced-diameter part k at the open end f of the can body g, that is, when the difference between the can body diameter i and the body diameter j of the reduced-diameter part is significant, the open end Since the thickness of the uppermost end element of section f is significantly increased, the can body g produced by the above method also suffers from problems such as buckling deformation during drawing and flange splitting during flange forming. However, the thickness of the reduced diameter part gradually increases toward the open end of the can body g, and the relatively thick part before diameter reduction becomes even thicker. There is a problem in that wrinkles are likely to occur in the reduced diameter part, impairing the appearance.Also, if the wall thickness of the opening end f is reduced by t+ffi in order to improve this problem or to reduce costs by reducing the amount of material used, the wrinkles, etc. will not be improved. However, buckling deformation occurs during the drawing process, which is not preferable.
（解決しようとする問題点）
本発明はかかる従来の問題を解消し１缶胴径と縮径部の
胴径との差が顕著であっても、絞込み加工時に座屈変形
等をおこさず良好な加工を行うことができ、縮径部にし
７わ等が発生し２にくい軽量な有底筒状の缶胴の製造方
法を提供しようとするものである。(Problems to be Solved) The present invention solves such conventional problems, and even if there is a significant difference between the diameter of one can body and the diameter of the reduced diameter part, buckling deformation does not occur during the drawing process. It is an object of the present invention to provide a method for manufacturing a lightweight, bottomed cylindrical can body that can be processed in a manner that is easy to process, and that is less likely to cause creases or the like in the reduced diameter portion.
（問題点を解決するための手段）
本発明は、前記問題点を解消するためになさｎたもので
あって、有底筒状缶胴の胴部より厚い肉厚部を有する開
口端部に缶胴の開口端側に向って缶胴径より小径の縮径
部を形成する方法において、缶胴の開口端部の下端部分
を肉厚部として、該肉厚部から開口端側に向ってフラン
ジ形成部或はその近傍を除いて厚みを次第に薄くし２食
肉薄部を形成し、該肉薄部に肉厚部からフランジ形成部
に向って次第に小径とする絞込加工を施して缶胴径よす
小径の縮径部全形成することを特徴とする。(Means for Solving the Problems) The present invention has been made in order to solve the above-mentioned problems. In a method of forming a reduced diameter part smaller in diameter than the can body diameter toward the open end side of the can body, the lower end portion of the open end of the can body is used as the thick part, and from the thick part toward the open end side. The thickness is gradually reduced except for the flange forming part or its vicinity to form a two-thin part, and the thin part is subjected to a drawing process to gradually reduce the diameter from the thick part toward the flange forming part to change the can body diameter. It is characterized by forming the entire reduced diameter part with a small diameter.
（実施例） 以下本発明を図面によって説明する。(Example) The present invention will be explained below with reference to the drawings.
まず第５図人ないしＣ示のような従来の第１工程ないし
第３工程により、ブリキ、アルミニウム等の金属薄板か
ら径が比較的小径で、高さが高い有底筒状体を形成する
。First, a bottomed cylindrical body having a relatively small diameter and a high height is formed from a thin metal plate such as tin plate or aluminum by the conventional first to third steps as shown in FIGS.
そして本発明においては、第１図示のように有底筒状の
缶胴（１）の胴部（２）に常法のしごきポンチとしごき
ダイスとによるしごき加工を施す際、胴部（２）の胴厚
Ｔ１より厚い開口端部（３）にその下端部分の肉厚部（
４）より缶胴（１）の開口端側に向って厚みが次第に薄
くなるように成形して、続いて缶胴（１）の開口端側に
トリミング加工を施して缶胴（１）を所定高さＨに切断
し、こ１．により第１図示のような開口端部（３）にフ
ランジ形成部（５）を除いて上端部分の胴厚Ｔ３が下端
部分の肉厚部（４）の胴厚Ｔ２より薄＜１．また肉薄部
（６）が形成さルる。In the present invention, when ironing the body (2) of the bottomed cylindrical can body (1) using a conventional ironing punch and ironing die as shown in the first figure, the body (2) At the opening end (3) which is thicker than the body thickness T1 of the
4) Shape the can body (1) so that the thickness gradually becomes thinner toward the open end side, and then trim the open end side of the can body (1) to form the can body (1) into a predetermined shape. Cut to height H, 1. Therefore, the body thickness T3 of the upper end portion of the open end portion (3) excluding the flange forming portion (5) as shown in the first diagram is thinner than the body thickness T2 of the thick wall portion (4) of the lower end portion <1. Further, a thin portion (6) is formed.
次に缶胴（１）の開口端部（３）に形成さｆ′した肉薄
部（６）に常法の絞込加工により第２図示のような長さ
ＬＨでかつ缶胴径ｗ、！：ｐ小径の胴径Ｗ１で段部（７
）を備える第１小径部（８）を形成する。Next, the thin wall portion (6) formed at the open end (3) of the can body (1) with f' is subjected to a drawing process using a conventional method to obtain a length LH as shown in the second diagram and a can body diameter w,! : p Stepped part (7
) is formed.
続いて缶胴（１）の肉薄部（６）に形成さｎた第１小径
部（８）に絞込加工により第２図示のような缶胴（１）
の第１小径部（３）に開口端側へ間隔を存して長さＬ２
でかつ第１小径部（８）より小径の胴径Ｗ２で段部（７
）を備える第２小径部（９）を形成する。Subsequently, the first small diameter portion (8) formed in the thin wall portion (6) of the can body (1) is drawn to form the can body (1) as shown in the second figure.
The first small diameter portion (3) has a length L2 with a gap toward the open end side.
The stepped portion (7
) is formed.
更に缶胴（１）の肉薄部（６）に形成さｔ″した第２小
径部（９）に絞込加工により第２図示のような缶胴（１
）の第２小径部（９）に開口端側へ間隔を存して長さＬ
３でかつ第２小径部（９）より小径の胴径Ｗ３で段部（
７）を備える第３小径部ＱＯＩを形成する。Further, a second small diameter portion (9) with a diameter of t″ formed in the thin wall portion (6) of the can body (1) is drawn to form a can body (1) as shown in the second figure.
) with a length L at the second small diameter part (9) toward the open end side.
3 and has a body diameter W3 smaller than the second small diameter part (9).
7) to form a third small diameter portion QOI.
以上の工程により第２図示のように缶胴（１）の開口端
部（３）の肉薄部（６）に肉厚部（４）からフランジ形
成部（５） Ｋ向って胴径が缶胴径Ｗより次第に小径と
Ｉまた段部（７）を備える複数の小径部（８） （９）
ＱＯから成る縮径部αυが形成さｎた缶胴（１）を製
造する。Through the above steps, as shown in the second figure, the thin wall part (6) of the open end (3) of the can body (1) is formed from the thick wall part (4) to the flange forming part (5). A plurality of small diameter portions (8) (9) each having a diameter gradually smaller than the diameter W and a stepped portion (7).
A can body (1) is manufactured in which a reduced diameter portion αυ made of QO is formed.
かくするときは開口端部の胴部に近い下端部分は肉厚で
ありそｎより上部の肉薄の開口端部（３）は縮径部（１
１１ｉ形成する際絞込加工装置の工具の絞込みが加えら
ｎて胴厚の厚みが増しても従来のように過剰な肉厚とな
ることがなく適度な厚みとなるため加工時に座屈変形を
おこすことがなく、また缶胴（１）の軽量化を計ること
が出来るからコストダウンとなる。In this case, the lower end of the opening end near the body is thick, and the thinner opening end (3) above the lower end is the reduced diameter part (1).
When forming 11i, even if the thickness of the body increases due to the narrowing of the tool of the drawing device, it will not become excessively thick like in the past, but will have an appropriate thickness, so buckling deformation will be avoided during processing. Since the can body (1) can be made lighter, costs can be reduced.
前記実施例では有底筒状の缶胴（１）の胴部（２）にし
ごきポンチとしごきダイスとによるしごき加工を施して
、開口端部（３）に上端部分の胴厚Ｔ３が下端部分の肉
厚部（４）の胴厚Ｔ２より薄くした肉薄部（６）全形成
する際、第１図示例では肉薄部（６）の上端部分をフラ
ンジ形成部（５）の下端部分とを一致させて形成した力
（第３図示のように肉薄部（６）の上端部分をフランジ
形成部（５）の近傍（５ａ）に形成してもよい。更にフ
ランジ形成部（５）の厚さを肉薄部（６）の上端部分の
胴厚Ｔ３とほぼ同一厚さく第１図示）に形成したが、第
３図示のようにフランジ形成部（５）の厚さを肉薄部（
６）の上端部分より開口端側に向って次第に厚くなるよ
うに形成してもよい。In the above embodiment, the body part (2) of the bottomed cylindrical can body (1) is ironed using an ironing punch and ironing die, so that the body thickness T3 at the upper end part becomes the same at the lower end part at the open end part (3). When fully forming the thin wall portion (6) which is thinner than the body thickness T2 of the thick wall portion (4), in the first illustrated example, the upper end portion of the thin wall portion (6) is aligned with the lower end portion of the flange forming portion (5). (as shown in the third figure, the upper end portion of the thin wall portion (6) may be formed in the vicinity (5a) of the flange forming portion (5).Furthermore, the thickness of the flange forming portion (5) may be Although the thickness of the thin part (6) is approximately the same as the body thickness T3 of the upper end portion (as shown in the first figure), the thickness of the flange forming part (5) is changed as shown in the third figure.
6) It may be formed so that it becomes gradually thicker from the upper end portion toward the open end side.
′＝１：た第２図実練水から仮想練水のようにフランジ
形成部（５）或はその近傍（５ａ）で屈曲してフランジ
部（２）を形成する際にフランジ割ｎ等もなく、その後
に行わｎる内容物の充填後の缶蓋との巻締も良好に行う
ことができる。'=1: When forming the flange part (2) by bending the flange forming part (5) or its vicinity (5a) like the virtual drilling water from the actual water in Figure 2, the flange split n etc. Therefore, the subsequent seaming with the can lid after filling the contents can be performed satisfactorily.
前記実施例では縮径部α１）を缶胴（１）の中央部から
開口端側に向って相隣ｎる絞込部の胴径より順次小径で
段部（７）ヲ備える複数の小径部（８） （９） （１
０としたが、該小径５（８） （９） Ｑｄを缶胴（１
）の内外面からロールにより押圧することにより、第４
図示のように缶胴部（１）の開口端部（３）の肉薄部（
６）に所定の開口径Ｗ４を有し肉厚部（４）からフラン
ジ形成部（５）に向って胴径が次第に小径となる連続し
た長さＬ４の傾斜部（２）から成る縮径部α℃が形成さ
ｎた缶胴（１）に形成してもよい。本発明においては。In the embodiment described above, the reduced diameter part α1) is a plurality of small diameter parts including step parts (7) whose diameters are sequentially smaller than the body diameters of the adjacent narrowing parts from the center of the can body (1) toward the open end side. (8) (9) (1
0, but the small diameter 5 (8) (9) Qd is the can body (1
) by pressing from the inner and outer surfaces of the fourth
As shown in the figure, the thin wall part (
6) a reduced diameter portion consisting of a sloped portion (2) having a predetermined opening diameter W4 and a continuous length L4 in which the body diameter gradually decreases from the thick wall portion (4) toward the flange forming portion (5); It may be formed in the can body (1) in which α°C is formed. In the present invention.
縮径部の厚みが従来に比べ適切な厚みになっているため
、傾斜部α３にしわが発生することもなく良好にならし
７加工を行うことができる。Since the thickness of the reduced diameter portion is more appropriate than the conventional thickness, the smoothing 7 process can be performed satisfactorily without wrinkles occurring in the inclined portion α3.
尚本発明においては縮径部α１）を形成する絞込工程に
おける縮径率は４ないし３０％が好適であり、かつ縮径
部αＢの長さは１０ないし５０簡のような比較的長い縮
径部を有する缶胴の製法に好適である。In the present invention, it is preferable that the diameter reduction rate in the narrowing process for forming the reduced diameter part α1) is 4 to 30%, and the length of the reduced diameter part αB is relatively long, such as 10 to 50 pieces. It is suitable for manufacturing a can body having a diameter portion.
なお縮径率は次の通りである。Note that the diameter reduction ratio is as follows.
また厚さ０．３２ｍの金属薄板から成る缶胴材を用いて
有底筒状の缶胴（１）を製造したとき開口端部（３）の
肉厚部（４）の厚さＴ２は０．１４ないし０．２３日が
好適であう、更に肉薄部（６）の最上端部分の厚さＴ３
は０．１４ないし帆２３簡が好適である。Further, when a bottomed cylindrical can body (1) is manufactured using a can body material made of a thin metal plate with a thickness of 0.32 m, the thickness T2 of the thick wall portion (4) of the open end (3) is 0. .14 to 0.23 days is preferable, and the thickness T3 of the uppermost part of the thinner part (6)
A value of 0.14 to 23 strands is suitable.
次に厚さ００３２■のアルミニウム材から成る缶胴材を
用いて、第２図示のように缶胴径Ｗ６６＋ｍ、缶胴高さ
Ｈ１２０鰭、内容積３５０ｔｄ、段部（７）を備える小
径部（８） （’ｌ） ＱＯから成り、開口端の胴径Ｗ
３５７ ｗｍ長さＬ３８ｍ＋の縮径部αηを有する缶胴
（１）を本発明方法と、従来方法とにより形成し、主要
部分の厚さを測定した結果は次の通りである。Next, using a can body material made of aluminum material with a thickness of 0032 cm, as shown in the second diagram, the can body diameter W66+m, the can body height H120 fins, the internal volume 350 td, and the small diameter part (7) equipped with a step (7). 8) ('l) Consists of QO, body diameter W at open end
A can body (1) having a reduced diameter portion αη with a length L of 38 m+ was formed by the method of the present invention and the conventional method, and the thickness of the main portion was measured. The results are as follows.
単位篩
従って本発明方法によって製造さｎた缶胴は従来方法に
比してその開口端部に下端部分の肉厚部より開口端側に
向ってフランジ形成部を除いて次第に薄く（７た肉薄部
を形成し、かつ該肉薄部に絞込加工を施して縮径部を形
成してもその厚みが肉厚部の厚みより過剰な厚さとなら
ないことが確認さｎた。Unit sieve Therefore, compared to the conventional method, the can body manufactured by the method of the present invention has an opening end that is gradually thinner than the thicker part at the lower end, except for the flange forming part, toward the opening end. It was confirmed that even if a diameter-reduced portion is formed by forming a portion and drawing the thin portion, the thickness of the reduced-diameter portion does not become excessively thicker than the thickness of the thick portion.
（発明の効果）
このように本発明によるときは、有底筒状缶胴の胴部よ
り厚い肉厚部を有する開口端部に缶胴の開口端側に向っ
て缶胴径より小径の縮径部を形成する方法において、缶
胴の開口端部の下端部分を肉厚部として、該肉厚部から
開口端側に向ってフランジ形成部或はその近傍を除いて
厚みを次第に薄くした肉薄部を形成し、該肉薄部に肉厚
部から７ランジ形成部に向って次第に小径とする絞込加
工を施して缶胴径より小径の縮径部を形成することを特
徴とすることにより有底筒状の缶胴を製造する。従って
まず缶胴の開口端部に肉薄部を形成し、次いで該肉薄部
に缶胴径より小径の縮径部を形成させるようにしたので
、開口端部の胴部に近い下端部分が肉厚で缶胴径と縮径
部の胴径との差が顕著であっても、縮径部を形成する際
縮径部の開口端側の厚さが増しても従来のように過剰な
肉厚とならないため加工時の座屈変形や７ランジ割れ等
もなく、更に縮径部が長くともしわが発生せず缶胴を軽
量化してコストダウンを計ることが出来る有底筒状の缶
胴を製造出来る等の効果がある。(Effects of the Invention) As described above, according to the present invention, a diameter reduction smaller than the can body diameter is provided at the open end portion of the bottomed cylindrical can body, which has a wall thickness thicker than the body portion, toward the open end side of the can body. In the method of forming the diameter portion, the lower end portion of the open end of the can body is used as the thick wall portion, and the thickness is gradually reduced from the thick wall portion toward the open end side except for the flange forming portion or the vicinity thereof. The method is characterized in that the thin wall portion is subjected to a drawing process to gradually reduce the diameter from the thick wall portion toward the seven flange forming portion to form a reduced diameter portion smaller in diameter than the can body diameter. Manufacture a bottom cylindrical can body. Therefore, first a thin wall part is formed at the open end of the can body, and then a reduced diameter part smaller in diameter than the can body diameter is formed in the thin wall part, so that the lower end part of the open end near the body is thicker. Even if the difference between the diameter of the can body and the diameter of the reduced diameter part is significant, even if the thickness at the open end of the reduced diameter part increases when forming the reduced diameter part, there will be no excess wall thickness as in the conventional method. Since this product does not cause buckling deformation or 7-lunge cracking during processing, the can body has a bottomed cylindrical shape that does not cause wrinkles even if the reduced diameter part is long, making the can body lighter and reducing costs. It has advantages such as being able to be manufactured.
第１図および第２図は本発明の製造方法の１例によって
得られた缶胴を示すもので、第１図は缶胴の開口端部に
肉薄部を形成した状態の一部截断側面図、第２図は肉薄
部に縮径部を形成した状態の一部截断側面図、第３図は
缶胴の開口端部に肉薄部を形成しまた状態の変形例を示
す一部截断側面図、第４図は肉薄部に形成した縮径部の
変形例の一部截断側面図、第５図は従来の製造方法を説
明するための線図である。
（１）・・・缶胴 （２）・・・胴部（３）
・・・開口端部 （４）・・・肉厚部（５）・・
・フランジ形成部 （６）・・・肉薄部ｅ１１）・・・
縮径部
Ｗ・・・缶胴径Figures 1 and 2 show a can body obtained by an example of the manufacturing method of the present invention, and Figure 1 is a partially cutaway side view of the can body with a thin wall portion formed at the open end. , FIG. 2 is a partially cut-away side view of a state in which a reduced diameter portion is formed in the thin wall portion, and FIG. 3 is a partially cut-away side view showing a modified example of the state in which a thin wall portion is formed in the open end of the can body. , FIG. 4 is a partially cutaway side view of a modified example of the reduced diameter portion formed in the thin wall portion, and FIG. 5 is a diagram for explaining the conventional manufacturing method. (1)...Can body (2)...Body (3)
...Opening end (4)...Thick part (5)...
・Flange forming part (6)... Thin wall part e11)...
Reduced diameter part W...Can body diameter
Claims (1)
缶胴の開口端側に向って缶胴径より小径の縮径部を形成
する方法において、缶胴の開口端部の下端部分を肉厚部
として、該肉厚部から開口端側に向ってフランジ形成部
或はその近傍を除いて厚みを次第に薄くした肉薄部を形
成し、該肉薄部に肉厚部からフランジ形成部に向って次
第に小径とする絞込加工を施して缶胴径より小径の縮径
部を形成することを特徴とする缶胴の製造方法。In a method of forming a reduced diameter part having a diameter smaller than the can body diameter toward the open end side of the can body at the open end having a thicker wall than the body of the bottomed cylindrical can body, the open end of the can body A thin wall portion is formed in which the lower end portion is a thick wall portion and the thickness is gradually reduced from the thick wall toward the opening end except for the flange forming portion or the vicinity thereof, and the flange is formed in the thin wall portion from the thick wall portion to the flange forming portion. A method for manufacturing a can body, characterized in that a narrowing process is performed to gradually reduce the diameter toward the forming part to form a reduced diameter part smaller in diameter than the can body diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19562586A JPH0790302B2 (en) | 1986-08-22 | 1986-08-22 | Can barrel manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19562586A JPH0790302B2 (en) | 1986-08-22 | 1986-08-22 | Can barrel manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6352721A true JPS6352721A (en) | 1988-03-05 |
| JPH0790302B2 JPH0790302B2 (en) | 1995-10-04 |
Family
ID=16344280
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19562586A Expired - Fee Related JPH0790302B2 (en) | 1986-08-22 | 1986-08-22 | Can barrel manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0790302B2 (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0386335A (en) * | 1989-08-28 | 1991-04-11 | Kondoo Seiko Kk | Cylindrical member and its manufacture |
| JPH03243231A (en) * | 1990-02-19 | 1991-10-30 | Nippon Light Metal Co Ltd | Integrated double container and its manufacture |
| JPH08206758A (en) * | 1995-02-02 | 1996-08-13 | Yamakou:Kk | Manufacture of metal container |
| WO1998005445A1 (en) * | 1996-08-02 | 1998-02-12 | Crown Cork & Seal Technologies Corporation | Improved metal can and method of making |
| US5829290A (en) * | 1996-02-14 | 1998-11-03 | Crown Cork & Seal Technologies Corporation | Reshaping of containers |
| US5832766A (en) * | 1996-07-15 | 1998-11-10 | Crown Cork & Seal Technologies Corporation | Systems and methods for making decorative shaped metal cans |
| US5960659A (en) * | 1995-10-02 | 1999-10-05 | Crown Cork & Seal Company, Inc. | Systems and methods for making decorative shaped metal cans |
| JP2005335726A (en) * | 2004-05-25 | 2005-12-08 | Daiwa Can Co Ltd | Bottle-shaped can manufacturing method |
| JP2008132522A (en) * | 2006-11-29 | 2008-06-12 | Showa Aluminum Kan Kk | Metallic can body and its manufacturing method |
| JP2013208652A (en) * | 2007-12-28 | 2013-10-10 | Toyo Seikan Co Ltd | Resin coated seamless can body |
| JP2014200811A (en) * | 2013-04-03 | 2014-10-27 | 北海製罐株式会社 | Can body machining method and can body |
| JP2018154407A (en) * | 2016-12-26 | 2018-10-04 | ユニバーサル製缶株式会社 | Production method of bottle can |
| JP2019111554A (en) * | 2017-12-22 | 2019-07-11 | ユニバーサル製缶株式会社 | Method for manufacturing bottle can |
| WO2023021436A1 (en) * | 2021-08-20 | 2023-02-23 | Canpack S.A. | A punch, a semi-finished can, and a can manufactured with use of the said punch |
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|---|---|---|---|---|
| JP4472429B2 (en) * | 2004-05-31 | 2010-06-02 | ユニバーサル製缶株式会社 | DI can manufacturing method and bottle can |
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-
1986
- 1986-08-22 JP JP19562586A patent/JPH0790302B2/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0755346B2 (en) * | 1989-08-28 | 1995-06-14 | コンドーセイコー株式会社 | Manufacturing method of automobile components |
| JPH0386335A (en) * | 1989-08-28 | 1991-04-11 | Kondoo Seiko Kk | Cylindrical member and its manufacture |
| JPH03243231A (en) * | 1990-02-19 | 1991-10-30 | Nippon Light Metal Co Ltd | Integrated double container and its manufacture |
| JPH08206758A (en) * | 1995-02-02 | 1996-08-13 | Yamakou:Kk | Manufacture of metal container |
| US5960659A (en) * | 1995-10-02 | 1999-10-05 | Crown Cork & Seal Company, Inc. | Systems and methods for making decorative shaped metal cans |
| US5829290A (en) * | 1996-02-14 | 1998-11-03 | Crown Cork & Seal Technologies Corporation | Reshaping of containers |
| US5832766A (en) * | 1996-07-15 | 1998-11-10 | Crown Cork & Seal Technologies Corporation | Systems and methods for making decorative shaped metal cans |
| US5970767A (en) * | 1996-07-15 | 1999-10-26 | Crown Cork & Seal Technologies Corporation | Systems and methods for making decorative shaped metal cans |
| WO1998005445A1 (en) * | 1996-08-02 | 1998-02-12 | Crown Cork & Seal Technologies Corporation | Improved metal can and method of making |
| US5938389A (en) * | 1996-08-02 | 1999-08-17 | Crown Cork & Seal Technologies Corporation | Metal can and method of making |
| JP2005335726A (en) * | 2004-05-25 | 2005-12-08 | Daiwa Can Co Ltd | Bottle-shaped can manufacturing method |
| JP4553350B2 (en) * | 2004-05-25 | 2010-09-29 | 大和製罐株式会社 | Manufacturing method of mini bottle type aluminum can |
| JP2008132522A (en) * | 2006-11-29 | 2008-06-12 | Showa Aluminum Kan Kk | Metallic can body and its manufacturing method |
| JP2013208652A (en) * | 2007-12-28 | 2013-10-10 | Toyo Seikan Co Ltd | Resin coated seamless can body |
| JP2014200811A (en) * | 2013-04-03 | 2014-10-27 | 北海製罐株式会社 | Can body machining method and can body |
| JP2018154407A (en) * | 2016-12-26 | 2018-10-04 | ユニバーサル製缶株式会社 | Production method of bottle can |
| JP2019111554A (en) * | 2017-12-22 | 2019-07-11 | ユニバーサル製缶株式会社 | Method for manufacturing bottle can |
| WO2023021436A1 (en) * | 2021-08-20 | 2023-02-23 | Canpack S.A. | A punch, a semi-finished can, and a can manufactured with use of the said punch |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0790302B2 (en) | 1995-10-04 |
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| Date | Code | Title | Description |
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| LAPS | Cancellation because of no payment of annual fees |