JPH0777652B2 - Method for manufacturing a can body for a sleep-piece can - Google Patents
Method for manufacturing a can body for a sleep-piece canInfo
- Publication number
- JPH0777652B2 JPH0777652B2 JP61047266A JP4726686A JPH0777652B2 JP H0777652 B2 JPH0777652 B2 JP H0777652B2 JP 61047266 A JP61047266 A JP 61047266A JP 4726686 A JP4726686 A JP 4726686A JP H0777652 B2 JPH0777652 B2 JP H0777652B2
- Authority
- JP
- Japan
- Prior art keywords
- diameter
- opening
- forming surface
- small
- 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.)
- Expired - Fee Related
Links
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、少なくとも一方の開口部側に傾斜部を備える
飲料缶などに用いるスリーピース缶用の缶胴の製造方法
に関する。Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a can body for a three-piece can, which is used for a beverage can or the like having an inclined portion on at least one opening side.
（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
り変形缶が多用されるようになって来た。(Prior Art) In recent years, deformed cans have been widely used in metal beverage cans and the like due to diversification of hobbies.
その一種として缶胴の開口部に向って缶胴径が次第に小
径となるなめらかな傾斜部を備えるツーピースの変形缶
は知られている。このツーピースの変形缶の製造方法と
しては、特開昭57-501768号公報に見られるように第５
図Ａ示の如く、缶胴ａの開口部ｂ側に絞込加工を施して
段部ｃを備える複数の小径部ｄを形成し、次いでこの缶
胴ａの開口部ｂの外方より加工ロールｅを当接させてこ
の加工ロールｅで段部ｃおよび小径部ｄを缶胴ａの内方
へ押圧して第５図Ｂ示の如く傾斜部ｆを形成する方法が
提案されている。As a type of such, a two-piece deformed can is known which is provided with a smooth inclined portion in which the diameter of the can body gradually decreases toward the opening of the can body. As a method of manufacturing this two-piece deformed can, as described in Japanese Patent Laid-Open No. 57-501768,
As shown in FIG. A, a narrowing process is performed on the opening b side of the can body a to form a plurality of small diameter parts d having a step c, and then the working roll is applied from the outside of the opening b of the can body a. A method has been proposed in which e is brought into contact with the processing roll e to press the step portion c and the small diameter portion d inward of the can body a to form an inclined portion f as shown in FIG. 5B.
しかしながら、このような製造方法によるときは、缶胴
ａの開口部ｂ側の段部および小径部ｄを加工ロールｅで
押圧して傾斜部ｆを形成させる際、傾斜部ｆに連なる端
部ｇの開口径ｈが缶胴ａの内方に加工ロールｒの押圧力
で縮径される。すなわち多段の小径部ｄが平坦化される
と共に缶胴ａの開口部ｂの開口径ｈも縮小される。従っ
て缶胴材料がアルミニウムの如く柔かい絞込加工性の良
い材料を用いた場合は前記製造方法は好適である。しか
しながら缶胴材料がブリキ板、テイン・フリー・スチー
ル板のように硬くかつ絞込加工性がアルミニウム板より
劣る材料を用いて缶胴ａの端部ｇを縮径すると共に段部
ｃおよび小径部ｄに加工ロールｅを押圧して傾斜を形成
するような加工を行なうためには、この加工ロールｅに
は急激で大きな押圧力が必要となり、加工ロールｅにも
複雑な動きが必要である。そのため装置は複雑となり、
更に前記の急激で押圧加工により缶胴ａの傾斜部ｆや開
口端部にしわが発生して外観を損うという問題がある。However, according to such a manufacturing method, when the stepped portion on the opening b side of the can body a and the small diameter portion d are pressed by the processing roll e to form the inclined portion f, the end portion g connected to the inclined portion f is formed. The opening diameter h of is reduced by the pressing force of the processing roll r inward of the can body a. That is, the multi-stage small-diameter portion d is flattened, and the opening diameter h of the opening portion b of the can body a is also reduced. Therefore, when the can body material is a material such as aluminum that is soft and has good workability, the above-described manufacturing method is suitable. However, the material of the can body is hard such as tin plate and tein-free steel plate and is inferior to the aluminum plate in workability, and the end part g of the can body a is reduced in diameter and the step c and the small diameter part are used. In order to perform processing such that the processing roll e is pressed against d to form an inclination, the processing roll e requires a large pressing force, and the processing roll e also needs a complicated movement. This makes the device complicated,
Further, there is a problem that wrinkles are generated in the inclined portion f and the opening end portion of the can body a due to the abrupt and pressing work, and the appearance is deteriorated.
このような急激で大きな押圧力によるしわを避けるため
には極めて徐々に大きな押圧力を加えることが必要とな
り製造効率が極めて低下するという不都合がある。In order to avoid such a wrinkle caused by a sudden and large pressing force, it is necessary to apply a very large pressing force very gradually, and there is a disadvantage that the manufacturing efficiency is extremely lowered.
（発明が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、缶胴の形状に変化
を与えた趣味感のあるデザインであって、少なくとも一
方の開口部側になめらかな傾斜部を備えたスリピース缶
用のスチール製溶接缶胴をしわを生ぜしめることなく効
率よく製造する方法を提供しようとするものである。(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems and has a tasteful design in which the shape of the can body is changed. At least one opening side has a smooth sloped portion. An object of the present invention is to provide a method for efficiently manufacturing a steel welding can body for a Sripiece can, which is provided with the above, without causing wrinkles.
（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れたものであ
って、両端に開口部を有するスチール製溶接缶胴の一端
側或は両端側に缶胴の開口部側に向って缶胴径が次第に
小径となる連続した傾斜部を形成するものにおいて、前
記缶胴の一端側或は両端側に缶胴中央側から開口部側に
複数の間隔を存し、そして開口部側から遠い順に複数回
の絞込加工を施して缶胴中央側から開口部側に向って相
隣れる絞込部の胴径より順次小径で段部を備える複数の
小径部を形成すると共に、開口部の開口径を前記傾斜部
を形成した際の所定の径に形成し、次いで缶胴の少なく
とも一方の開口部側に形成された前記小径部の缶胴の開
口部内にロール成形装置の内型を挿入せしめると共に、
ロール成形装置の外型の傾斜部形成面を小径部に嵌合
し、外型の傾斜部形成面を内型の形成面側に圧接して、
次いで内型を回転させながら外型の傾斜部形成面と内型
の形成面との間で前記小径部を順次挟圧して平坦な傾斜
部を形成することを特徴とする。(Means for Solving Problems) The present invention has been made to solve the above-mentioned problems, and is one end of a steel welded can barrel having openings at both ends or a can barrel at both ends. In the case of forming a continuous inclined portion in which the diameter of the can body gradually decreases toward the opening side, there are a plurality of intervals from the center side of the can body to the opening side at one or both ends of the can body. , And a plurality of small-diameter parts each having a stepped portion with diameters successively smaller than the body diameter of the adjacent narrowing parts from the center side of the can body toward the opening side by performing narrowing processing multiple times in order from the opening side. Along with the formation, the opening diameter of the opening portion is formed to a predetermined diameter when the inclined portion is formed, and then rolled into the opening portion of the small diameter can body formed on at least one opening side of the can body. While inserting the inner mold of the molding device,
The slope forming surface of the outer die of the roll forming device is fitted to the small diameter portion, and the slope forming surface of the outer die is pressed against the inner die forming surface,
Next, while rotating the inner die, the small diameter portion is sequentially pressed between the outer die inclined portion forming surface and the inner die forming surface to form a flat inclined portion.
（実施例） 以下本発明を図面により説明する。EXAMPLES The present invention will be described below with reference to the drawings.
第１図ＡないしＦは本発明の缶胴の製造方法の１例であ
り、そしてこの実施例では第３図示のような缶胴（１）
の一端（３）側に開口部（２）側に向って缶胴径が次第
に小径となる連続した傾斜部（12）を、また缶胴（１）
の他端（４）側に段部（５）を備える複数の小径部（1
1）を形成する方法を示すものである。また本発明で用
いる缶胴（１）は第１図Ａ示のように絞り込れる前は一
端（３）側から他端（４）側まで同じ缶胴径Ｗを有する
従来多用されるスリーピース缶用の缶胴であり、缶胴部
材の内面および外面に側縁継目部を除き保護塗料および
印刷を施し、次いでこれを丸めて側縁継目部を溶接した
両端に開口部（２）を備えたスチール製溶接缶胴であ
る。FIGS. 1A to 1F show an example of a method for manufacturing a can body according to the present invention, and in this embodiment, a can body (1) as shown in FIG. 3 is used.
At one end (3) side of the can body (1) with a continuous inclined part (12) whose diameter gradually becomes smaller toward the opening (2) side.
A plurality of small-diameter parts (1) having a step (5) on the other end (4) side of the
1 shows a method of forming 1). Further, the can body (1) used in the present invention has a can body diameter W from the one end (3) side to the other end (4) side before being narrowed down as shown in FIG. A can body for use, which is provided with protective paint and printing on the inner surface and the outer surface of the can body member except for the side edge seams, and then rolled to weld the side edge seams, and provided with openings (2) at both ends. It is a steel welding can barrel.
まず、第１図Ｂ示のようにターレットフィダー（35）に
保持された缶胴（１）の一端（３）側に第１絞込装置
（21）の外型（26）を、また缶胴（１）の他端（４）側
に保持装置（36）の保持部（37）を同時に缶胴（１）の
中央側に前進させて、第１絞込装置（21）の案内部（2
8）の保持面（29）に缶胴（１）の一端側を、また保持
装置（36）の保持部（37）の内面（38）に缶胴（１）の
他端（４）側を夫々嵌合させる。次いで第１絞込装置
（21）の内型（27）の缶胴（１）の中央側に前進させて
缶胴（１）の一端（３）側の開口部（２）内に挿入せし
める。そして再び第１絞込装置（21）の外型（26）を缶
胴（１）の中央側に前進させると、缶胴（１）の一端
（３）は外型（26）の段部形成面（32）に沿い続いて外
型（26）の成形部（30）の内周面（31）に沿ってこの内
周面（31）と内型（27）の外周面（33）とにより形成さ
れた間隙（34）の端部（34a）まで進められ、これによ
り第２図示のような長さＬ1でかつ缶胴径Ｗより小孔の
胴径Ｗ1で段部（５）を備える第１小径部（６）が形成
される。First, as shown in FIG. 1B, the outer die (26) of the first narrowing device (21) is attached to the one end (3) side of the can body (1) held by the turret feeder (35), and the can body is also attached. At the other end (4) side of (1), the holding part (37) of the holding device (36) is simultaneously advanced to the center side of the can body (1), and the guide part (2) of the first narrowing device (21).
The holding surface (29) of 8) has one end side of the can body (1), and the inner surface (38) of the holding part (37) of the holding device (36) has the other end side (4) of the can body (1). Fit each one. Then, it is advanced toward the center of the can body (1) of the inner die (27) of the first narrowing device (21) and inserted into the opening (2) on the one end (3) side of the can body (1). Then, when the outer mold (26) of the first narrowing device (21) is advanced again toward the center of the can body (1), one end (3) of the can body (1) forms a stepped portion of the outer mold (26). By the inner peripheral surface (31) and the outer peripheral surface (33) of the inner mold (27) along the inner peripheral surface (31) of the molding portion (30) of the outer mold (26) following the surface (32). The step (5) is advanced to the end (34a) of the formed gap (34), and thereby the length L 1 as shown in the second illustration and the barrel diameter W 1 of the hole smaller than the can barrel diameter W. A first small diameter portion (6) to be provided is formed.
次に第１図Ｃ示のように前工程で一端（３）側に第１小
径部（６）が形成された缶胴（１）をターレットフィダ
ー（40）で保持し、缶胴（１）の一端（３）側に第２絞
込装置（22）の外型（41）を、また缶胴（１）の他端
（４）側に第３絞込装置（23）の外型（51）を同時に缶
胴（１）の中央側に前進させて、第２絞込装置（22）の
案内部（43）の保持面（44）に缶胴（１）の一端（３）
側の第１小径部（６）を、また第３絞込装置（23）の案
内部（53）の保持面（54）に缶胴（１）の他端（４）側
を夫々嵌合させる。次いで第２絞込装置（22）の内型
（42）と、第３絞込装置（23）の内型（52）とを同時に
缶胴（１）の中央側に前進させて缶胴（１）の両開口部
（２）内に挿入せしめる。そして再び第２絞込装置（2
2）の外型（41）と第３絞込装置（23）の外型（51）と
を同時に缶胴（１）の中央側に前進させると、缶胴
（１）の一端（３）は外型（41）の段部形成面（47）に
沿い、続いて外型（41）の成形部（45）の内周面（46）
に沿ってこの内周面（46）と内型（42）の外周面（48）
との間に形成された間隙（49）の端部（49a）まで進め
られると共に、缶胴（１）の他端（４）は外型（51）の
段部形成面（57）に沿い、続いて外型（51）の成形部
（55）の内周面（56）に沿ってこの内周面（56）と内型
（52）の外周面（58）との間に形成された間隙（59）の
端部（59a）まで進められ、これにより第２図示のよう
な缶胴（１）の第１小径部（６）に開口部（２）側へ間
隔を存して長さＬ2でかつ第１小径部（６）より小径の
胴径Ｗ2で段部（５）を備える第２小径部（７）が、ま
た缶胴（１）の他端（４）側に長さＬ3でかつ缶胴径Ｗ
より小径の胴径Ｗ3で段部（５）を備える第２小径部
（８）が夫々形成される。Next, as shown in FIG. 1C, the can barrel (1) having the first small diameter portion (6) formed on one end (3) side in the previous step is held by the turret feeder (40), and the can barrel (1) is held. The outer die (41) of the second narrowing device (22) on one end (3) side, and the outer die (51) of the third narrowing device (23) on the other end (4) side of the can body (1). ) Is simultaneously advanced to the center side of the can body (1), and one end (3) of the can body (1) is attached to the holding surface (44) of the guide portion (43) of the second narrowing device (22).
Side first small diameter portion (6) and the holding surface (54) of the guide portion (53) of the third narrowing device (23) at the other end (4) side of the can body (1), respectively. . Then, the inner mold (42) of the second narrowing device (22) and the inner mold (52) of the third narrowing device (23) are simultaneously advanced to the center side of the can body (1) to move the can body (1). ) Insert into both openings (2). And again the second narrowing device (2
When the outer mold (41) of 2) and the outer mold (51) of the third narrowing device (23) are simultaneously advanced to the center side of the can body (1), one end (3) of the can body (1) is Along the step forming surface (47) of the outer mold (41), and subsequently, the inner peripheral surface (46) of the molding part (45) of the outer mold (41).
Along this inner peripheral surface (46) and the outer peripheral surface (48) of the inner mold (42)
While advancing to the end (49a) of the gap (49) formed between and, the other end (4) of the can body (1) follows the step forming surface (57) of the outer mold (51), Subsequently, a gap formed along the inner peripheral surface (56) of the molding portion (55) of the outer mold (51) between the inner peripheral surface (56) and the outer peripheral surface (58) of the inner mold (52). It is advanced to the end portion (59a) of the (59), whereby the first small diameter portion (6) of the can body (1) as shown in the second figure is spaced toward the opening portion (2) side by the length L. 2 and a second small diameter portion (7) having a step portion (5) with a diameter W 2 smaller than the first small diameter portion (6), and also having a length on the other end (4) side of the can body (1) L 3 and can body diameter W
The second small diameter portion (8) having the step portion (5) is formed with the smaller diameter W 3 respectively.
続いて第１図Ｄ示のように前工程で一端（３）側に第１
小径部（６）と第２小径部（７）とが、他端（４）側に
第３小径部（８）が夫々形成された缶胴（１）をターレ
ットフィダー（60）に保持し、缶胴（１）の一端（３）
側に第４絞込装置（24）の外型（61）を、また缶胴
（１）の他端（４）側に第５絞込装置（25）の外型（7
1）を同時に缶胴（１）の中央側に前進させて、第４絞
込装置（24）の案内部（63）の保持面（64）に缶胴
（１）の一端（３）側の第２の小径部（７）を、また第
５絞込装置（25）の案内部（73）の保持面（74）に缶胴
（１）の他端（４）側の第３小径部（８）を夫々嵌合さ
せる。次いで第４絞込装置（24）の内型（62）と、第５
絞込装置（25）で内型（72）とを同時に缶胴（１）の中
央側に前進させて缶胴（１）の両開口部（２）内に挿入
せしめる。そして再び第４絞込装置（24）の外型（61）
と、第５絞込装置（25）の外型（71）とを同時に缶胴
（１）の中央側に前進させると、缶胴（１）の一端
（３）は外型（61）の段部形成面（67）に沿い、続いて
外型（61）の成形部（65）の内周面（66）に沿ってこの
内周面（66）と内型（62）の外周面（68）とにより形成
された間隙（69）の端部（69a）まで進められると共
に、缶胴（１）の他端（４）は外型（71）の段部形成面
（77）に沿い、続いて外型（71）の成形部（75）の内周
面（76）に沿ってこの内周面（76）と内型（72）の外周
面（78）とにより形成された間隙（79）の端部（79a）
まで進められ、これにより第２図示のような缶胴（１）
の第２小径部（７）に開口部（２）側へ間隔を存して長
さＬ4でかつ第２小径部（７）より小径の胴径Ｗ4で段部
（５）を備える第４小径部（９）が、また第３小径部
（８）に開口部（２）側へ間隔を存して長さＬ5でかつ
第３小径部（８）より小径の胴径Ｗ5で段部（５）を備
える第５小径部（10）が夫々形成される。Then, as shown in FIG. 1D, a first step is performed on one end (3) side in the previous step.
The small diameter portion (6) and the second small diameter portion (7) hold the can body (1) having the third small diameter portion (8) formed on the other end (4) side on the turret feeder (60), One end (3) of the can body (1)
The outer die (61) of the fourth narrowing device (24) on the side, and the outer die (7) of the fifth narrowing device (25) on the other end (4) side of the can body (1).
1) is simultaneously advanced to the center side of the can body (1), and the holding surface (64) of the guide portion (63) of the fourth narrowing device (24) is attached to one end (3) side of the can body (1). The second small diameter portion (7) and the holding surface (74) of the guide portion (73) of the fifth narrowing device (25) are provided with a third small diameter portion (on the other end (4) side of the can body (1) ( 8) are fitted together. Next, the inner die (62) of the fourth narrowing device (24) and the fifth
At the same time, the inner mold (72) is advanced to the center side of the can body (1) by the narrowing device (25) and inserted into both openings (2) of the can body (1). And again, the outer die (61) of the fourth narrowing device (24)
And the outer die (71) of the fifth narrowing device (25) are simultaneously advanced to the center side of the can body (1), one end (3) of the can body (1) is a step of the outer die (61). The inner peripheral surface (66) and the outer peripheral surface (68) of the inner mold (62) along the inner peripheral surface (66) of the molding portion (65) of the outer mold (61), along the part forming surface (67). ) And the end (69a) of the gap (69) formed by and the other end (4) of the can body (1) follows the step forming surface (77) of the outer mold (71), Along the inner peripheral surface (76) of the molding portion (75) of the outer mold (71) and a gap (79) formed by the inner peripheral surface (76) and the outer peripheral surface (78) of the inner mold (72). End of (79a)
To the can body (1) as shown in the second illustration.
A second small diameter portion (7) having a step portion (5) with a length L 4 spaced from the opening (2) side and a body diameter W 4 smaller than the second small diameter portion (7). 4 small-diameter portion (9) has a length L 5 spaced from the third small-diameter portion (8) toward the opening (2) side and a body diameter W 5 smaller than the third small-diameter portion (8). Fifth small diameter portions (10) each having a step portion (5) are formed.
以上の工程で第２図示のように缶胴（１）の両開口部
（２）側に段部（５）を備える複数の小径部（11）が、
かつ次に述べる傾斜部（12）を形成した際の所定の開口
部（２）の開口径Wx（第３図参照）と同一径の第４小径
部（９）の胴径Ｗ4が形成された缶胴（１）を製造す
る。In the above process, a plurality of small diameter parts (11) having step parts (5) on both sides of the opening (2) of the can body (1) are formed as shown in the second illustration.
Further, the body diameter W 4 of the fourth small diameter portion (9) having the same diameter as the opening diameter Wx of the predetermined opening portion (2) when the inclined portion (12) described below is formed (see FIG. 3) is formed. Manufacture a can body (1).
そして第３図示のように缶胴（１）の一端（３）側にな
めらかな傾斜部（12）を形成するには、まず第１図Ｅ示
のように前工程で得られた缶胴（１）をターレットフィ
ダー（89）により保持させ、この保持された缶胴（１）
の一端（３）側に傾斜部形成面（83）を備える外型（8
2）と、この外型（82）の傾斜部形成面（83）に対応す
る形状の形成面（85）を備える内型（84）とから構成さ
れたロール成形装置（81）を、また缶胴（１）の他端
（４）側に保持装置（86）の保持部（87）を同時に前進
させて、ロール成形装置（81）の内型（84）を缶胴
（１）の一端（３）側の開口部（２）内に挿入せしめる
と共に、外型（82）の傾斜部形成面（83）を一端（３）
側の多段の小径部（11）に嵌合させ、また保持装置（8
6）の保持部（87）の内面（88）に缶胴（１）の他端
（４）側の多段の小径部（11）を嵌合させる。続いて第
１図Ｆ示のようにロール成形装置（81）の外型（82）と
保持装置（86）とを内型（84）に向って移動して軸心を
偏心させ、外型（82）の傾斜部形成面（83）を内型（8
4）の形成面（85）側に圧接し、次いで内型（84）を回
転させると外型（82）は偏心状態で内型（84）と共に回
転し、外型（82）の傾斜部形成面（83）と内型（84）の
形成面（85）との間で缶胴（１）の一端（３）側の多段
の小径部（11）はその全周に亘って順次挟圧され、第３
図示のように缶胴（１）の一端（３）側に所定の開口径
Wxを有し缶胴（１）の中央側から開口部（２）側に向っ
て缶胴径が次第に小径となる連続した長さLxの傾斜部
（12）を形成する。Then, in order to form the smooth sloped portion (12) on the one end (3) side of the can body (1) as shown in FIG. 3, first, as shown in FIG. 1E, the can body ( 1) is held by a turret feeder (89), and the held can body (1)
The outer die (8) having an inclined portion forming surface (83) on one end (3) side of the
A roll forming device (81) comprising a 2) and an inner die (84) having a forming surface (85) having a shape corresponding to the inclined portion forming surface (83) of the outer die (82), and a can. The holding part (87) of the holding device (86) is simultaneously advanced to the other end (4) side of the body (1) to move the inner die (84) of the roll forming device (81) to one end of the can body (1) ( It is inserted into the opening (2) on the side of (3) and the inclined portion forming surface (83) of the outer die (82) is attached to one end (3).
Side multi-stage small diameter part (11), and holding device (8
The multistage small-diameter portion (11) on the other end (4) side of the can body (1) is fitted to the inner surface (88) of the holding portion (87) of 6). Subsequently, as shown in FIG. 1F, the outer die (82) and the holding device (86) of the roll forming apparatus (81) are moved toward the inner die (84) to eccentric the axial center, and the outer die ( The inclined part forming surface (83) of the inner surface of the inner mold (8)
When the inner mold (84) is rotated by pressing against the formation surface (85) side of 4), the outer mold (82) rotates together with the inner mold (84) in an eccentric state, and the inclined portion of the outer mold (82) is formed. Between the surface (83) and the forming surface (85) of the inner mold (84), the multi-stage small-diameter portion (11) on the one end (3) side of the can body (1) is sequentially clamped over its entire circumference. , Third
As shown in the figure, a predetermined opening diameter is provided on one end (3) side of the can body (1).
A slanted portion (12) having a continuous length Lx, which has Wx and whose can body diameter is gradually reduced from the center side of the can body (1) toward the opening (2) side, is formed.
第４図は、第１図Ｅ及びＦと同様に第３図示のなめらか
な傾斜部（12）を形成する他の実施例を示すもので、第
４図Ａ示のように前工程で得られた缶胴（１）をターレ
ットフィダー（89）により保持させ、この保持された缶
胴（１）の一端（３）側にロール成形装置（81）を挿着
し他端（４）側に保持装置（86）を挿着する。更に詳細
には、ロール成形装置（81）の外型（82）を缶胴（１）
の一端（３）側の小径部（11）の外側に傾斜部形成面
（83）を一致させて配置し、内型（84）を缶胴（１）中
に挿入し、前記傾斜部形成面（83）に対応する形状の形
成面（85）を小径部（11）に一致させて配置する一方、
保持装置（86）の内型（90）を缶胴（１）の他端（４）
側から缶胴（１）に挿入し、ロール成形装置（81）の内
型（84）と突き合わせ、同時に保持装置（86）の外型
（92）も缶胴（１）の外周に配置する。このとき、保持
装置（86）の内型（90）に形成した缶胴（１）の他端
（４）側の小径部（11）に対応する形状の圧着面（93）
は該小径部（11）と一致した位置にある。FIG. 4 shows another embodiment in which the smooth inclined portion (12) shown in FIG. 3 is formed similarly to FIGS. 1E and F, and is obtained in the previous step as shown in FIG. 4A. The can body (1) is held by the turret feeder (89), the roll forming device (81) is inserted into one end (3) side of the held can body (1) and the other end (4) side is held. Insert the device (86). More specifically, the outer die (82) of the roll forming device (81) is attached to the can body (1).
The inclined portion forming surface (83) is arranged outside the small diameter portion (11) on the side of one end (3) of the same, and the inner mold (84) is inserted into the can body (1) to form the inclined portion forming surface. While the forming surface (85) having a shape corresponding to (83) is arranged so as to match the small diameter portion (11),
The inner mold (90) of the holding device (86) is connected to the other end (4) of the can body (1).
From the side, it is inserted into the can body (1) and abutted against the inner mold (84) of the roll forming device (81), and at the same time, the outer mold (92) of the holding device (86) is also arranged on the outer periphery of the can body (1). At this time, a crimping surface (93) having a shape corresponding to the small diameter portion (11) on the other end (4) side of the can body (1) formed in the inner die (90) of the holding device (86).
Is at a position corresponding to the small diameter portion (11).
次いで第４図Ｂ示の如く、保持装置（86）の外型（92）
を内型（90）へ移動して偏心させて圧着面（93）と、保
持装置（89）の内型（90）とにより缶胴（１）を挾持さ
せる。このとき保持装置（86）の内型（90）の圧着面
（93）は小径部（11）の内面形状に沿って嵌合する。Next, as shown in FIG. 4B, the outer mold (92) of the holding device (86).
Is moved to the inner mold (90) to be eccentric, and the can body (1) is held by the crimping surface (93) and the inner mold (90) of the holding device (89). At this time, the crimping surface (93) of the inner die (90) of the holding device (86) is fitted along the inner surface shape of the small diameter portion (11).
続いて第４図Ｃ示のように両内型（84）（90）を回転さ
せて缶胴（１）を両内型（84）（90）の軸心の周りを偏
心状態で回転させ、その後、ロール成形装置（81）の外
型（82）を内型（84）側へ移動して軸心を偏心させて、
外型（82）の傾斜部形成面（83）を内型（84）の形成面
（85）側へ圧接し、これに伴って外型（82）も回転し外
型（82）の傾斜部形成面（83）と内型（84）の形成面
（85）との間で小径部（11）はその全周に亘って順次挟
圧され、第３図示のように缶胴（１）の一端（３）側に
所定の開口径Wxを有し缶胴（１）の中央側から開口部
（２）側に向って缶胴径が次第に小径となる連続した長
さLxの傾斜部（12）を形成する。Then, as shown in FIG. 4C, the inner molds (84) and (90) are rotated to rotate the can body (1) around the axis of the inner molds (84) and (90) in an eccentric state. Then, the outer die (82) of the roll forming device (81) is moved to the inner die (84) side to eccentric the shaft center,
The inclined part forming surface (83) of the outer mold (82) is pressed against the forming surface (85) side of the inner mold (84), and the outer mold (82) also rotates accordingly, and the inclined part of the outer mold (82). The small diameter portion (11) is sequentially pressed over the entire circumference between the forming surface (83) and the forming surface (85) of the inner mold (84), and as shown in FIG. A sloped portion (12) having a predetermined opening diameter Wx at one end (3) side and having a continuous length Lx in which the diameter of the can body gradually decreases from the center side of the can body (1) toward the opening (2) side. ) Is formed.
以上の工程により第３図示のように缶胴（１）の一端
（３）側に傾斜部（12）をまた他端（４）側に多段の小
径部（11）が形成された缶胴（１）を製造する。Through the above steps, as shown in FIG. 3, a can body (1) having an inclined portion (12) on one end (3) side and a multi-stage small diameter portion (11) on the other end (4) side ( 1) is manufactured.
かくするときは、缶胴径Ｗと開口部（２）の開口径Wxと
の差が顕著であっても、多段の小径部（11）を形成した
後に缶胴（１）の内外面からロール成形装置（81）の外
型（82）と内型（84）とで押圧して平坦な傾斜部（12）
の形成を行なうためブリキ板、テイン・フリー・スチル
板のような硬く、絞込加工性がアルミニウム板より劣る
缶胴材料を用いても材料に急激な圧縮歪を与えないので
傾斜部（12）や開口端部にしわを生ぜしめることなく、
かつ所定の開口部（２）の開口径Wxを予め形成された小
径部（11）の胴径Ｗ4を変えることなしに連続して効率
よく製造出来る。In this case, even if the difference between the can body diameter W and the opening diameter Wx of the opening portion (2) is remarkable, the rolls are formed from the inner and outer surfaces of the can body (1) after forming the multi-stage small diameter portion (11). A flat inclined part (12) pressed by the outer mold (82) and the inner mold (84) of the molding device (81).
To form a tin plate, a tin-free steel plate, which is hard and has a narrowing workability that is inferior to an aluminum plate, it does not give a sudden compressive strain to the material, so the sloped part (12) Or without wrinkling at the open end,
In addition, the opening diameter Wx of the predetermined opening portion (2) can be continuously and efficiently manufactured without changing the body diameter W 4 of the small diameter portion (11) formed in advance.
前記図示実施例では缶胴（１）の一端（３）側に傾斜部
（12）をまた他端（４）側に多段の小径部（11）を形成
させたが、他端（４）側に開口部（12）側に向って缶胴
径が次第に小径となる連続した傾斜部を、一端（３）側
に傾斜部（12）を形成する際にこの傾斜部（12）の形成
と同様の方法および装置を用いて形成させても良い。In the illustrated embodiment, the inclined portion (12) is formed on one end (3) side of the can body (1) and the multi-step small diameter portion (11) is formed on the other end (4) side, but the other end (4) side is formed. At the time of forming the continuous inclined part in which the can body diameter becomes gradually smaller toward the opening (12) side and forming the inclined part (12) at the one end (3) side, the same as the formation of this inclined part (12) You may form using the method and apparatus of.
また図示実施例では一端（３）側の傾斜部（12）の長さ
Lxを他端（４）の多段の小径部（11）の長さLyより長く
形成させたが、両者の長さLxとLyとを同一長さに形成さ
せても良い。Further, in the illustrated embodiment, the length of the inclined portion (12) on the one end (3) side
Although Lx is formed longer than the length Ly of the multi-stage small-diameter portion (11) at the other end (4), both lengths Lx and Ly may be formed to be the same length.
前記実施例のように小径部（11）を形成する各絞込工程
において、その絞込工程毎の を、その絞込工程前の縮径率より順に小さくすれば一端
（３）側、他端（４）側に小径部（11）を形成させるた
めの絞込成形加圧を順次大きくする必要もなく、かつ段
部（５）にしわを生ぜしめるようなことがない。In each narrowing down step of forming the small diameter portion (11) as in the above embodiment, It is also necessary to sequentially increase the press-molding pressure for forming the small-diameter portion (11) on the one end (3) side and the other end (4) side by sequentially decreasing the diameter reduction ratio before the narrowing step. There is no wrinkle on the step (5).
また本製造方法によって得られた缶胴（１）は傾斜部
（12）の形成後続いて開口部（２）の両端にフランジ部
を形成せしめるものであるが、該両端に同時にフランジ
部を形成する従来の装置にそのまま接続出来て、製造工
程および作業性の点でもメリットが大きい。Further, the can body (1) obtained by the present manufacturing method is one in which the flange portion is formed at both ends of the opening portion (2) after the formation of the inclined portion (12), but the flange portion is simultaneously formed at the both ends. It can be connected to conventional equipment as it is, which is a great advantage in terms of manufacturing process and workability.
（発明の効果） このように本発明によるときは、缶胴の一端側或は両端
側に缶胴中央側から開口部側に複数の間隔を存し、そし
て開口部側から遠い順に複数回の絞込加工を施して缶胴
中央側から開口部側に向って相隣れる絞込部の胴径より
順次小径で段部を備える複数の小径部を形成すると共
に、開口部の開口径を前記傾斜部を形成した際の所定の
径に形成し、次いで缶胴の少なくとも一方の開口部側に
形成された前記小径部の缶胴の開口部内にロール成形装
置の内型を挿入せしめると共に、ロール成形装置の外型
の傾斜部形成面を小径部に嵌合し、外型の傾斜部形成面
を内型の形成面側に圧接して、次いで内型を回転させな
がら外型の傾斜部形成面と内型の形成面との間で前記小
径部を順次挟圧して平坦な傾斜部を形成することにより
スリーピース缶用の缶胴を製造する。従ってまず缶胴の
一端側或は両端側の多段の小径部を形成し、次いでこの
多段の小径部を缶胴の内外面からロール成形装置の外型
と内型とで順次挟圧して平坦な傾斜部を形成させるよう
にしたので、缶胴径と開口部の開口径との差が顕著であ
って、缶胴材料が硬く、絞込加工性がアルミニウム板よ
り劣るスチール製缶胴であっても、所定の開口径を備
え、傾斜部や開口端部にしわがなく外観的に優れたスチ
ール製溶接缶胴を連続して効率よく製造出来る等の硬化
がある。(Effects of the Invention) As described above, according to the present invention, a plurality of intervals are provided from the center side of the can body to the opening side at one end side or both end sides of the can body, and a plurality of times are arranged in the order distant from the opening side. Narrowing is performed to form a plurality of small-diameter portions each having a step portion with a diameter successively smaller than the diameter of the adjacent narrowing portion from the center side of the can body toward the opening portion side, and the opening diameter of the opening portion is Formed to a predetermined diameter when forming the inclined portion, and then insert the inner mold of the roll forming device into the opening of the can body of the small diameter part formed on at least one opening side of the can body, and roll. The inclined portion forming surface of the outer die of the molding apparatus is fitted to the small diameter portion, the inclined portion forming surface of the outer die is pressed against the forming surface side of the inner die, and then the inclined portion of the outer die is formed while rotating the inner die. The small-diameter portion is sequentially pressed between the surface and the inner die forming surface to form a flat inclined portion. Manufactures can bodies for three-piece cans. Therefore, first, a multi-stage small-diameter portion is formed on one end side or both end sides of the can body, and then these multi-stage small-diameter portions are sequentially pressed from the inner and outer surfaces of the can body by the outer die and the inner die of the roll forming apparatus to form a flat surface. Since the inclined portion is formed, the difference between the diameter of the can body and the opening diameter of the opening is remarkable, the material of the can body is hard, and the narrowing workability is inferior to the aluminum plate. However, there is hardening such that a steel welded can barrel having a predetermined opening diameter and no wrinkles on the inclined portion or the opening end portion and having an excellent appearance can be continuously and efficiently manufactured.
第１図は本発明の製造方法の１例を説明するための線
図、第２図は第１図ＡないしＤの製造方法の途中過程に
おける缶胴の１例を示す截断側面図、第３図は第１図の
製造方法によって、得られた缶胴の１例を示す截断側面
図、第４図は他の実施例の製造方法を説明するための線
図、第５図は従来例の部分截断側面図である。 （１）……缶胴、（２）……開口部、（３）……一端 （５）……段部、（11）……小径部、（12）……傾斜部 （81）……ロール成形装置、（82）……外型、（83）…
…傾斜部形成面 （84）……内型、（85）……形成面FIG. 1 is a diagram for explaining an example of the manufacturing method of the present invention, and FIG. 2 is a cutaway side view showing an example of a can body in the middle of the manufacturing method of FIGS. 1A to 1D. FIG. 4 is a sectional side view showing an example of a can body obtained by the manufacturing method of FIG. 1, FIG. 4 is a diagram for explaining a manufacturing method of another embodiment, and FIG. 5 is a conventional example. It is a partially cut side view. (1) …… Can barrel, (2) …… Opening part, (3) …… One end (5) …… Step part, (11) …… Small diameter part, (12) …… Inclined part (81) …… Roll forming equipment (82) ... Outer mold (83) ...
… Inclined part forming surface (84) …… Inner mold, (85) …… Forming surface
───────────────────────────────────────────────────── フロントページの続き (72)発明者 竹田 由里 埼玉県岩槻市鹿室839−１ 北海製罐株式 会社技術本部内 (56)参考文献 特開 昭57−501768（ＪＰ，Ａ) 特開 昭61−209735（ＪＰ，Ａ) 特開 昭60−257937（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Yuri Takeda 839-1 Shimuro, Iwatsuki-shi, Saitama Hokai Seikan Co., Ltd. Technical Headquarters (56) Reference JP-A-57-501768 (JP, A) JP 61-209735 (JP, A) JP-A-60-257937 (JP, A)
Claims (1)
の一端側或は両端側に缶胴の開口部側に向って缶胴径が
次第に小径となる連続した傾斜部を形成するものにおい
て、前記缶胴の一端側或は両端側に缶胴中央側から開口
部側に複数の間隔を存し、そして開口部側から遠い順に
複数回の絞込加工を施して缶胴中央側から開口部側に向
って相隣れる絞込部の胴径より順次小径で段部を備える
複数の小径部を形成すると共に、開口部の開口径を前記
傾斜部を形成した際の所定の径に形成し、次いで缶胴の
少なくとも一方の開口部側に形成された前記小径部の缶
胴の開口部内にロール成形装置の内型を挿入せしめると
共に、ロール成形装置の外型の傾斜部形成面を小径部に
嵌合し、外型の傾斜部形成面を内型の形成面側に圧接し
て、次いで内型を回転させながら外型の傾斜部形成面と
内型の形成面との間で前記小径部を順次挟圧して平坦な
傾斜部を形成することを特徴とするスリーピース缶用の
缶胴の製造方法。1. A steel welded can body having openings at both ends thereof, wherein one end side or both end sides of the welded can body is formed with a continuous inclined portion whose diameter gradually becomes smaller toward the opening side of the can body. There is a plurality of intervals from the center side of the can body to the opening side on one end side or both end sides of the can body, and the plurality of narrowing processes are performed in the order distant from the opening side to open from the center side of the can body. Forming a plurality of small-diameter portions each having a step portion having a diameter successively smaller than the body diameters of the narrowed-down portions adjacent to each other, and forming the opening diameter of the opening portion to a predetermined diameter when the inclined portion is formed. Then, the inner die of the roll forming apparatus is inserted into the opening of the can body of the small diameter portion formed on at least one opening side of the can body, and the inclined portion forming surface of the outer die of the roll forming apparatus has a small diameter. The inner mold forming surface, and then the inner mold forming surface is pressed against the inner mold forming surface. Method for manufacturing a can body for a three-piece cans, characterized in that to form a flat inclined portion by applying successively clamping the small-diameter portion between the outer mold inclined forming surface and the inner mold of the forming surface of while rolling.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5063885 | 1985-03-15 | ||
| JP60-50638 | 1985-03-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS623839A JPS623839A (en) | 1987-01-09 |
| JPH0777652B2 true JPH0777652B2 (en) | 1995-08-23 |
Family
ID=12864497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61047266A Expired - Fee Related JPH0777652B2 (en) | 1985-03-15 | 1986-03-06 | Method for manufacturing a can body for a sleep-piece can |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0777652B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8978922B2 (en) | 2012-05-15 | 2015-03-17 | Silgan Containers Llc | Strengthened food container and method |
| US9382034B2 (en) * | 2012-05-15 | 2016-07-05 | Silgan Containers Llc | Strengthened food container and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60257937A (en) * | 1984-06-05 | 1985-12-19 | Sumitomo Light Metal Ind Ltd | Production of container |
-
1986
- 1986-03-06 JP JP61047266A patent/JPH0777652B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS623839A (en) | 1987-01-09 |
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