JP2556523B2 - Method for cold stretch forming of resin laminated aluminum foil - Google Patents
Method for cold stretch forming of resin laminated aluminum foilInfo
- Publication number
- JP2556523B2 JP2556523B2 JP62201429A JP20142987A JP2556523B2 JP 2556523 B2 JP2556523 B2 JP 2556523B2 JP 62201429 A JP62201429 A JP 62201429A JP 20142987 A JP20142987 A JP 20142987A JP 2556523 B2 JP2556523 B2 JP 2556523B2
- Authority
- JP
- Japan
- Prior art keywords
- punch
- aluminum foil
- top surface
- molding
- resin
- 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
Landscapes
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 この発明は、食品、化粧品、電子部品等の包装用容器
等の製造に際して、アルミニウム箔の少なくとも片面に
樹脂フィルムが積層された樹脂ラミネートアルミニウム
箔を材料とし、ポンチを使用して冷間張出し成形を行う
場合の成形加工方法に関する。The present invention relates to a resin-laminated aluminum foil in which a resin film is laminated on at least one side of an aluminum foil when manufacturing containers for packaging foods, cosmetics, electronic parts and the like. The present invention relates to a forming method when cold stretch forming is performed using a punch.
従来の技術 従来、前記のような用途のための皺なし容器の最も一
般的なものとしては、厚さ100μｍ前後のアルミニウム
箔を用いた深絞り成形品とか、あるいは合成樹脂成形品
が知られている。しかしながら、前者の深絞り成形品
は、生産性が悪いのみならず、厚箔を使用するためにコ
ストも高くつく難点がある。また後者の樹脂成形品は、
水分、酸素、光等のバリヤー性に劣るという固有の難点
がある。2. Description of the Related Art Conventionally, the most common wrinkle-free container for the above-mentioned applications is a deep-drawing molded product using an aluminum foil having a thickness of about 100 μm, or a synthetic resin molded product. There is. However, the former deep-drawing molded product is not only poor in productivity, but also has a drawback that the cost is high because a thick foil is used. The latter resin molded product is
There is an inherent difficulty in that the barrier properties against moisture, oxygen, light, etc. are poor.
そこで、これらの問題に対処するため、最近では、厚
さ30〜50μｍ程度のアルミニウム箔に樹脂フィルムを積
層した樹脂ラミネートアルミニウム箔を用いて、これを
冷間張出し成形により連続的に所定深さの容器に成形す
る方法が注目されている。Therefore, in order to deal with these problems, recently, a resin-laminated aluminum foil obtained by laminating a resin film on an aluminum foil having a thickness of about 30 to 50 μm is used, and this is continuously stretched to a predetermined depth by cold stretch forming. Attention has been focused on a method of forming a container.
この場合、上記の成形は、限界成形高さをできるだけ
高いものとなしうることが要請される。このような要請
に対処するための方策として、成形素材の選択、改善は
もちろん極めて重要なことであるが、一方において成形
方法、成形条件も成形高さに支配的な影響を及ぼす。こ
こに成形方法の選択として、単に成形深さを深くする目
的のためには応力が成形材料の全体に均一に付加される
真空成形、あるいは空気、油によるバルジ成形等が好ま
しいが、いずれも生産性、形状選択の自由性に劣る欠点
がある。そこで、生産性に優れる成形方法として、ポン
チによる張出し成形法の採用が最も有望視されるところ
である。In this case, the above-mentioned molding is required to have the maximum molding height as high as possible. As a measure for coping with such demands, it is of course extremely important to select and improve the molding material, but on the other hand, the molding method and molding conditions also have a dominant influence on the molding height. Here, as the selection of the molding method, for the purpose of simply increasing the molding depth, vacuum molding in which stress is uniformly applied to the entire molding material, or bulge molding with air or oil is preferable. However, there is a drawback that the flexibility and shape selection are inferior. Therefore, it is most promising to adopt the stretch molding method using a punch as a molding method having excellent productivity.
かかるポンチによる張出し成形においても可及的成形
高さの高い成形を可能とするためには、材料全体を均一
に変形させることが必要である。It is necessary to uniformly deform the entire material in order to enable molding with a molding height as high as possible even in the stretch molding using the punch.
発明が解決しようとする問題点 ところが、従来のポンチによる張出し成形加工方法で
は、いずれも材料を局部的に変形させるにとどまってお
り、材料全体を均一に変形させることは困難であった。
即ち、例えば天面即ち成形素材に接する頭頂面において
素材の流れ出しを良くするために、天面を円弧状に形成
したポンチを用いた場合には、天面で大きな変形が得ら
れることとなる。一方天面に平坦部を有するポンチを用
いると、平坦部の面積が増加するに従って天面の素板と
の間に作用する滑り抵抗が大きいものとなってポンチと
ダイとのクリアランス部で大きな変形が得られ、天面部
では変形量が少ないものとなる。このように従来の成形
方法では、素材の部分的な変形を生ずるのみであり、成
形高さを高くするには限界があった。The problems to be solved by the invention, however, all of the conventional punching methods using punches only locally deform the material, and it is difficult to uniformly deform the entire material.
That is, for example, in the case of using a punch in which the top surface is formed in an arc shape in order to improve the outflow of the material on the top surface, that is, the top surface in contact with the forming material, a large deformation is obtained on the top surface. On the other hand, if a punch with a flat portion on the top surface is used, as the area of the flat portion increases, the sliding resistance acting between the top surface and the blank becomes large, and the deformation between the punch and the die becomes large. Is obtained, and the amount of deformation is small on the top surface portion. As described above, in the conventional molding method, only partial deformation of the material occurs, and there is a limit to increase the molding height.
この発明はかかる技術的背景に鑑みてなされたもので
あって、ポンチによる張出し成形加工方法においてより
高い成形高さを得ることを目的とするものである。The present invention has been made in view of the above technical background, and an object thereof is to obtain a higher forming height in an overhang forming method using a punch.
問題点を解決するための手段 上記目的を達成するためにこの発明は、その前提とし
て、アルミニウム箔の少なくとも片面に樹脂フィルムが
積層された樹脂ラミメーノアルミニウム箔を素板として
ポンチによる張出し成形を行う場合を対象とし、この場
合に、天面が円弧状をなすポンチを用いて行う前段加工
と、天面が平坦状をなすポンチを用いて行う後段加工と
を順次的に実施して上記成形を行うことを特徴とする。Means for Solving the Problems In order to achieve the above-mentioned object, the present invention is based on the premise that the resin lamimeno aluminum foil having a resin film laminated on at least one surface of the aluminum foil is used as a base plate for stretch forming by punching. In this case, the above-mentioned forming is performed by sequentially performing the pre-stage processing using a punch whose top surface has an arc shape and the post-stage processing performed using a punch whose top surface has a flat shape. It is characterized by performing.
素板として用いる樹脂ラミネートアルミニウム箔とし
ては、厚さ30〜50μｍ程度のアルミニウム箔の片面また
は両面に、塩化ビニル樹脂、ポリプロピレン樹脂、ポリ
エチレン樹脂等よりなる樹脂フィルムを積層一体化した
ものが一般的であり、その樹脂フィルム面側をポンチに
当接させて張出し成形を行うものである。The resin-laminated aluminum foil used as the base plate is generally one in which a resin film made of vinyl chloride resin, polypropylene resin, polyethylene resin or the like is laminated and integrated on one or both sides of an aluminum foil having a thickness of about 30 to 50 μm. In this case, the resin film surface side is brought into contact with the punch to perform stretch molding.
この発明による成形加工は、まず天面が第１図に示す
ように円弧状をなすポンチ（１）を用いて行うことを要
件とする。この前段加工はまず素板をポンチ天面におい
て十分に変形させるために行うものであるが、この目的
のためには、その天面（２）とポンチ側壁との連接部
（Ｐ）における天面円弧の接線とポンチの直径方向との
なす角度（θ）を５゜以上に設定するのが望ましい。ま
た角度（θ）の最大値は90゜で、この場合はポンチ半径
の曲率を有する球頭ポンチとなる。The forming process according to the present invention is required to be performed first by using a punch (1) whose top surface has an arc shape as shown in FIG. This pre-processing is first performed in order to sufficiently deform the blank plate on the punch top surface. For this purpose, for this purpose, the top surface at the connecting portion (P) between the top surface (2) and the punch sidewall is formed. It is desirable to set the angle (θ) formed by the tangent of the circular arc and the diameter direction of the punch to 5 ° or more. Further, the maximum value of the angle (θ) is 90 °, and in this case, the ball head punch has a curvature of the punch radius.
後段成形加工は、天面が平坦状を有するポンチを用い
て行う。この後段加工は、前段加工で変形を受けなかっ
た素板のポンチとダイのクリアランス部を変形させると
ともに、成形容器の底面を平坦にして容器を静置した際
の安定性を確保するために実施するものである。この後
段のポンチは前段のポンチと同一径のものを用いても良
いが、径を大きくして天面の面積を、天面が平坦である
としたときの前段のポンチの天面面積よりも大きく設定
した方が、より成形高さを高くできる点で好ましい。The post-forming process is performed using a punch having a flat top surface. This post-stage processing is performed to deform the blank punch and die clearance that were not deformed in the pre-stage processing, and to ensure stability when the bottom of the molding container is flat and the container is left stationary. To do. This punch in the latter stage may have the same diameter as the punch in the former stage, but the area of the top surface is larger than the punch in the former stage, and is larger than the top surface area of the punch in the former stage when the top surface is flat. It is preferable to set a large value because the molding height can be increased.
なおこの発明に用いるポンチは、その材質については
これを何ら限定するものではないが、例えば４フッ化エ
チレン樹脂性、即ちいわゆるテフロン（商品名…以下同
じ）製ポンチのような天面の摩擦係数の小さいポンチを
用いれば、より天面と素板との滑り抵抗を小さくでき、
ひいてはより高い成形高さを得ることができる点で好ま
しい。またこの発明では、前段加工を角度（θ）を変え
た２種以上のポンチを用いて行うものとしても良い。The punch used in the present invention is not limited in its material, but is made of, for example, tetrafluoroethylene resin, that is, a friction coefficient of the top surface such as a punch made of so-called Teflon (trade name ... hereinafter). If you use a small punch, you can reduce the sliding resistance between the top surface and the blank,
Further, it is preferable in that a higher molding height can be obtained. Further, in the present invention, the pre-stage processing may be performed by using two or more types of punches having different angles (θ).
発明の効果 以上説明したように、この発明に係る樹脂ラミネート
アルミニウム箔の張出し成形加工方法は、まずポンチ天
面が円弧状をなすポンチを用いて前段加工を行い、その
後天面が平坦状であるポンチを用いて後段加工を行うも
のであるから、まず前段加工によりポンチ天面において
素板が十分変形されるとともに、後段加工において前段
の成形で変形を受けなかったポンチとダイのクリアラン
ス部が変形を受けることとなる。その結果素板の全体を
均一かつ十分に変形させることができるから、成形高さ
の増大化が可能となりひいては成形の自由性の増大、成
形歩留りの向上を図ることができる効果を奏する。Effects of the Invention As described above, in the method of forming a resin-laminated aluminum foil according to the present invention, the punch top surface is first subjected to the pre-processing using a punch having a circular arc top surface, and then the top surface is flat. Since the post processing is performed using the punch, the blank plate is sufficiently deformed on the top surface of the punch by the front processing, and the clearance between the punch and the die, which was not deformed by the former molding in the post processing, is deformed. Will be received. As a result, the entire blank can be uniformly and sufficiently deformed, so that it is possible to increase the molding height, which leads to an increase in molding flexibility and an improvement in molding yield.
実施例 ダイ：内径80mm、コーナーR1mm 成形素板：ポリエステル（PET）25μm/Al箔40μm/ポリ
プロピレンキャストフィルム（CPP）70μｍの積層によ
る樹脂ラミネートアルミニウム箔 上記ダイ、成形素板を用いるとともに、直径70mm、コ
ーナーR5mmのポンチを後段のポンチとし、かつ天面の形
状、角度（θ）、面積を第１表に示すように設定した前
段のポンチを用いて前後２段の段階的な張出し成形加工
を行った。なお、各ポンチとの、その材質をテフロン製
とした。そして各成形で得られた容器の成形高さを調べ
た。また、後段のポンチのみを用いて成形加工を行った
場合の成形高さも調べた。その結果を第１表に示す。Example Die: Inner diameter 80 mm, corner R1 mm Molding base plate: Polyester (PET) 25 μm / Al foil 40 μm / Polypropylene cast film (CPP) 70 μm laminated resin laminated aluminum foil Using the above die and molding base plate, a diameter of 70 mm, The punch with the corner R5mm is used as the punch in the latter stage, and the former punch with the shape, angle (θ), and area of the top surface set as shown in Table 1 is used to perform stepwise overhanging processing in the front and rear two stages. It was The material of each punch was made of Teflon. Then, the molding height of the container obtained by each molding was examined. Further, the molding height when the molding process was performed using only the punch in the latter stage was also investigated. The results are shown in Table 1.
上記結果から本発明によれば成形高さを高くすること
が可能であることを確認しえた。 From the above results, it was confirmed that according to the present invention, the molding height can be increased.
第１図は前段加工に用いるポンチの要部断面図である。 （１）……ポンチ、（２）……天面。 FIG. 1 is a sectional view of an essential part of a punch used for the pre-stage processing. (1) …… Punch, (2) …… Top surface.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高田 進 大阪府堺市海山町６丁224番地 昭和ア ルミニウム株式会社内 (72)発明者 南谷 広治 大阪府堺市海山町６丁224番地 昭和ア ルミニウム株式会社内 (56)参考文献 特開 昭64−44225（ＪＰ，Ａ) 特開 昭64−27890（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Susumu Takada 6-224 Kaiyamacho, Sakai City, Osaka Prefecture Showa Aluminum Co., Ltd. Incorporated (56) References JP 64-44225 (JP, A) JP 64-27890 (JP, A)
Claims (2)
ィルムが積層された樹脂ラミネートアルミニウム箔を素
板としてポンチによる張出し成形を行うに際し、天面が
円弧状をなすポンチを用いて行う前段加工と、天面が平
坦状をなすポンチを用いて行う後段加工とを順次的に実
施して上記成形を行うことを特徴とする樹脂ラミネート
アルミニウム箔の冷間張出し成形加工方法。1. A pre-stage process which uses a punch having an arc-shaped top surface when stretch-forming by punching using a resin-laminated aluminum foil having a resin film laminated on at least one surface of an aluminum foil as a base plate, A cold-expansion forming method for a resin-laminated aluminum foil, characterized in that the above-mentioned forming is performed by sequentially performing post-stage processing performed using a punch having a flat surface.
ンチ側壁との連接部における天面円弧の接線とポンチの
直径方向とのなす角度が５゜以上である特許請求の範囲
第１項記載の樹脂ラミネートアルミニウム箔を冷間張出
し成形加工方法。2. The punch used for the pre-stage processing, wherein the angle formed by the tangent line of the top surface arc and the diametrical direction of the punch at the connecting portion between the top surface and the side wall of the punch is 5 ° or more. A method for cold-expanding the resin-laminated aluminum foil described.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62201429A JP2556523B2 (en) | 1987-08-11 | 1987-08-11 | Method for cold stretch forming of resin laminated aluminum foil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62201429A JP2556523B2 (en) | 1987-08-11 | 1987-08-11 | Method for cold stretch forming of resin laminated aluminum foil |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6444226A JPS6444226A (en) | 1989-02-16 |
| JP2556523B2 true JP2556523B2 (en) | 1996-11-20 |
Family
ID=16440938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62201429A Expired - Fee Related JP2556523B2 (en) | 1987-08-11 | 1987-08-11 | Method for cold stretch forming of resin laminated aluminum foil |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2556523B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001340926A (en) * | 2000-05-31 | 2001-12-11 | Showa Denko Kk | Cold bulging method of resin laminated aluminum foil |
| CN1202976C (en) * | 2001-01-22 | 2005-05-25 | 珠海保税区中富聚酯啤酒瓶有限公司 | Method for manufacturing crystal type bottle mouth structure of polyester beer bottle |
| JP2003053438A (en) * | 2001-08-10 | 2003-02-26 | Showa Denko Kk | Overhang molding method and container |
-
1987
- 1987-08-11 JP JP62201429A patent/JP2556523B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6444226A (en) | 1989-02-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |