JP2007229807A - Method and device for manufacturing metal bottle can - Google Patents

Method and device for manufacturing metal bottle can Download PDF

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JP2007229807A
JP2007229807A JP2007147978A JP2007147978A JP2007229807A JP 2007229807 A JP2007229807 A JP 2007229807A JP 2007147978 A JP2007147978 A JP 2007147978A JP 2007147978 A JP2007147978 A JP 2007147978A JP 2007229807 A JP2007229807 A JP 2007229807A
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cylindrical body
bottomed cylindrical
screw
tool
bottle
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JP4850783B2 (en
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Masahiro Hosoi
正宏 細井
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Altemira Can Co Ltd
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Universal Can Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To stabilize a position where a bottomed cylindrical body is held by a workpiece holding section so that the height of a thread formed on a metal bottle can is made constant. <P>SOLUTION: The invention relates to a method for manufacturing the metal bottle can by forming the bottomed cylindrical body W with the bottom of the bottomed cylindrical body W held by a die ring 22. The method comprises a necking step and a threading step. In the necking step, a tapered portion and a mouthpiece portion are formed by diametrically shrinking the opening of the bottomed cylindrical body W. In the threading step, a thread is formed on the mouthpiece portion while at least either of the trunk or tapered portion of the bottomed cylindrical body W is pressed to the die ring 22. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、有底筒状体の底部をダイリングに保持した状態で成形して金属製ボトル缶を製造する方法および金属製ボトル缶の製造装置に関する。   The present invention relates to a method for manufacturing a metal bottle can by molding a bottomed cylindrical body held in a die ring and a metal bottle can manufacturing apparatus.

一般に、金属製ボトル缶（以下、ボトル缶と称す）は、アルミニウムやアルミニウム合金製の金属板に絞り加工（ｄｒａｗｎｉｎｇ）やしごき加工（ｉｒｏｎｉｎｇ）等の加工を多段階に施すことによって形成され、飲料用の容器として広く使われている（特許文献１参照）。   In general, a metal bottle can (hereinafter referred to as a bottle can) is formed by subjecting a metal plate made of aluminum or aluminum alloy to multi-stage processing such as drawing or ironing. It is widely used as a container for use (see Patent Document 1).

その製造装置には、金属板から成形された有底筒状体を保持するワーク保持部と、この有底筒状体を成形加工する加工ツールを保持するツール保持部とが備えられていて、有底筒状体は円板面に環状に配列されて保持される一方、加工ツールは各有底筒状体に対向するように円板面に環状に配列されて保持されている。   The manufacturing apparatus includes a work holding unit that holds a bottomed cylindrical body formed from a metal plate, and a tool holding unit that holds a processing tool that forms the bottomed cylindrical body, The bottomed cylindrical body is annularly arranged and held on the disk surface, while the processing tool is annularly arranged and held on the disk surface so as to face each bottomed cylindrical body.

有底筒状体は、ワーク保持部およびツール保持部と軸方向を一致させて、開口部をツール保持部に向けて保持されている。
ツール保持部には、加工ツールとして、筒状体の開口部を縮径してテーパ部および口金部を成形する（ネックイン加工）ための多数の絞り型や、口金部にネジ形状を形成するネジ形成用ツール、開口端にカール部を形成するカール加工用ツール等、各加工段階に応じた加工を行うための各種のツール（工具）が備えられていて、各ツールが工程順に配列されている。 The bottomed cylindrical body is held with the opening portion facing the tool holding portion with the workpiece holding portion and the tool holding portion aligned in the axial direction.
In the tool holding part, as a processing tool, a plurality of drawing dies for forming a tapered part and a base part (neck-in process) by reducing the diameter of the opening of the cylindrical body and a screw shape in the base part are formed. Various tools (tools) for performing processing according to each processing stage, such as a screw forming tool and a curling tool for forming a curled portion at the opening end, are provided, and each tool is arranged in the order of processes. Yes.

なお、有底筒状体に加えられる加工の工程としては、開口部を多段階に縮径するネックイン加工工程、ネックイン加工により形成された口金部の形状を整え、高さを揃えるトリマー工程、口金部にネジ形状を成形するネジ形成工程、口金先端を外側に折り曲げるカール部形成工程、カール部を押しつぶすカールかしめ工程等があり、その各工程に応じたツールによって加工が行われる。   In addition, as a processing step added to the bottomed cylindrical body, a neck-in processing step for reducing the diameter of the opening in multiple stages, a trimmer step for adjusting the shape of the base portion formed by the neck-in processing, and aligning the height There are a screw forming process for forming a screw shape on the base part, a curl part forming process for bending the tip of the base outward, a curl caulking process for crushing the curl part, and the like, and processing is performed with a tool corresponding to each process.

さらに、ワーク保持部とツール保持部とは、相対回転可能かつ軸方向に相対進退可能となっていて、これらのワーク保持部とツール保持部とが互いに接近したときに各ツールが各工程に応じた加工を有底筒状体に対して施し、両装置が離れたときに各筒状体に対して次工程のツールが対向するように両装置が相対回転する。このように、両装置が接近して加工を行い、回転するという動作が繰り返されることにより、有底筒状体にはテーパ部、口金部、ネジ形状等が順次形成されてボトル缶としての形状が付与されることになる。   Furthermore, the work holding part and the tool holding part are relatively rotatable and can be relatively advanced and retracted in the axial direction. When the work holding part and the tool holding part come close to each other, each tool corresponds to each process. The two apparatuses rotate relative to each other so that the tool in the next process faces each cylindrical body when both apparatuses are separated from each other. In this way, by repeating the operation of both devices approaching and rotating, the bottomed cylindrical body is formed with a tapered portion, a base portion, a screw shape, etc. in order, and the shape as a bottle can Will be granted.

このように形成されたボトル缶は、内容物が充てんされた後に、口金部に装着されたキャップにより密閉される。キャップは、カップ状に形成されたアルミニウムまたはアルミニウム合金製のキャップ材を、口金部の形状に沿うように変形させることにより装着される。このキャップ材の変形（巻き締め）は、一般に、円盤状のローラをキャップ材の外周面に押し付けた状態で回転（転動）させることにより行われる。   The bottle can thus formed is sealed with a cap attached to the base after the contents are filled. The cap is mounted by deforming a cap material made of aluminum or aluminum alloy formed in a cup shape so as to follow the shape of the cap portion. The deformation (winding) of the cap material is generally performed by rotating (rolling) the disk-shaped roller while being pressed against the outer peripheral surface of the cap material.

ローラは上方（ボトル先端側）に付勢保持されており、最初に口金部上部に当接されて転動し始める。ローラがキャップ材外周面を回転するうちに口金部のネジ山上端部に接触すると、ローラはこのネジ山形状に導かれてネジ上端部からネジ溝に入り、ネジ溝下端部まで転動する。これにより、キャップ材にネジ形状が形成されて、ボトル缶の口金部にキャップが装着されることになる。
特開２００１−２３９３２８号公報 The roller is biased and held upward (bottle tip side), and first comes into contact with the upper part of the base part and starts rolling. When the roller rotates on the outer peripheral surface of the cap material and comes into contact with the upper end portion of the thread of the cap portion, the roller is guided by this thread shape, enters the screw groove from the upper end portion of the screw, and rolls to the lower end portion of the screw groove. Thereby, a screw shape is formed in the cap material, and the cap is attached to the cap portion of the bottle can.
JP 2001-239328 A

このような製造装置によって製造されたボトル缶に上述した方法でキャップを装着する場合、口金部のネジ山の上端部の高さが一定しないと、キャップを確実に装着できない巻き締め不良が発生するおそれがある。すなわち、キャップを装着する際のネジ形成用のローラがネジ山上端部に当接できないために単にキャップ材上部を転動するだけでネジ形状を形成することができなかったり、ローラが最初にキャップ材のネジ山上に押圧されて口金部のネジ山が潰されるなど、キャップ材に所望のネジ形状を形成することができない。このため、口金部のネジ山の上端部の高さを一定とすることが必要となる。   When the cap is mounted on the bottle can manufactured by such a manufacturing apparatus by the above-described method, if the height of the upper end portion of the screw thread of the base portion is not constant, there is a risk that a tightening failure in which the cap cannot be securely mounted may occur. There is. In other words, since the screw-forming roller when attaching the cap cannot contact the upper end of the thread, it is not possible to form a screw shape simply by rolling the upper part of the cap material. A desired screw shape cannot be formed in the cap material, for example, the screw thread of the base is crushed by being pressed onto the screw thread of the material. For this reason, it is necessary to make the height of the upper end portion of the thread of the base portion constant.

この問題に対応するには、ボトル缶の口金部にネジ形状を成形するネジ形成加工が、有底筒状体を保持するワーク保持部とツール保持部のネジ形成用ツールとの間を位置決めして行われることから、有底筒状体をワーク保持部に対して正確な位置で保持させることが重要となる。
しかしながら、ネジ形成加工に先立って行われるネックイン加工工程において、縮径されたテーパ部や口金部が絞り型の離型に伴いツール保持部側に引っ張られてしまうため、ネジ形成工程開始時における有底筒状体のワーク保持部に対する保持位置がばらついてしまうという問題がある。 To cope with this problem, the screw forming process that forms the screw shape on the base of the bottle can positions the work holding part that holds the bottomed cylindrical body and the screw forming tool of the tool holding part. Therefore, it is important to hold the bottomed cylindrical body at an accurate position with respect to the work holding portion.
However, in the neck-in process that is performed prior to the screw forming process, the taper part and the base part that have been reduced in diameter are pulled toward the tool holding part along with the mold release of the drawing mold, so at the time of starting the screw forming process. There is a problem that the holding position of the bottomed cylindrical body with respect to the work holding portion varies.

本発明は、上記課題を鑑みてなされたもので、ワーク保持部に対する有底筒状体の保持位置を安定させ、ボトル缶に形成されるネジ山高さを一定にすることを目的とする。   This invention is made | formed in view of the said subject, and it aims at stabilizing the holding position of the bottomed cylindrical body with respect to a workpiece holding part, and making constant the thread height formed in a bottle can.

上記課題を解決するために、請求項１の発明に係る金属製ボトル缶の製造方法は、有底筒状体の底部をダイリングに保持した状態で、該有底筒状体を成形して金属製ボトル缶を製造する方法であって、前記有底筒状体の開口部を縮径してテーパ部および口金部を成形するネッキング加工工程と、前記口金部にネジ形状を成形するネジ形成加工工程とを有し、 前記ネジ形成加工工程では、前記有底筒状体の胴部及びテーパ部の少なくとも一方を前記ダイリングに対して押しつけながらネジ形成加工が行われることを特徴としている。
請求項２の発明に係る金属製ボトル缶の製造装置は、ネッキング加工によって開口部を縮径してテーパ部および口金部が成形された有底筒状体の底部を保持するダイリングと、前記口金部にネジ形状を成形するネジ形成用ツールとを備え、前記有底筒状体をボトル缶に成形する金属製ボトル缶の製造装置であって、前記ネジ形成用ツールは、前記有底筒状体の開口部に対向するとともに軸方向に相対的に進退可能に設けられ、その軸方向移動によって、前記有底筒状体の胴部にはめこまれる円筒面部及び前記テーパ部に押し付けられる円錐面部の少なくとも一方を備えていることを特徴としている。
この発明によれば、ネジ形成用ツールによるネジ形成加工の際に、有底筒状体をダイリングに押し付けて、有底筒状体を所定位置とすることができる。したがって、有底筒状体の保持位置が安定し、口金部の所定位置に安定してネジ形状を形成することが可能となり、巻き締め不良が生じにくい金属製ボトル缶を製造することができる。 In order to solve the above-mentioned problem, a method for manufacturing a metal bottle can according to the invention of claim 1 is characterized in that the bottomed cylindrical body is molded in a state where the bottom of the bottomed cylindrical body is held by a die ring. A method of manufacturing a metal bottle can, wherein a necking process for forming a tapered part and a base part by reducing the diameter of the opening of the bottomed cylindrical body, and a screw forming for forming a screw shape on the base part In the screw forming processing step, the screw forming processing is performed while pressing at least one of the body portion and the taper portion of the bottomed cylindrical body against the die ring.
An apparatus for manufacturing a metal bottle can according to the invention of claim 2 includes: a die ring that holds a bottom portion of a bottomed cylindrical body in which a diameter of an opening portion is reduced by necking and a taper portion and a base portion are formed; A screw forming tool for forming a screw shape in a base part, and a metal bottle can manufacturing apparatus for forming the bottomed cylindrical body into a bottle can, wherein the screw forming tool is the bottomed tube A cone facing the opening of the cylindrical body and capable of moving forward and backward relative to the axial direction, and a cone pressed against the cylindrical surface portion and the tapered portion fitted into the body of the bottomed cylindrical body by the axial movement It is characterized by having at least one of the surface portions.
According to the present invention, the bottomed cylindrical body can be brought into a predetermined position by pressing the bottomed cylindrical body against the die ring during the screw forming process by the screw forming tool. Therefore, the holding position of the bottomed cylindrical body is stable, it is possible to stably form a screw shape at a predetermined position of the base part, and it is possible to manufacture a metal bottle can that is unlikely to cause winding failure.

請求項３の発明に係る金属製ボトル缶の製造装置は、前記円筒面部及び前記円錐面部の少なくとも一方を前記ダイリング側へと付勢するバネを備えていることを特徴としている。     A metal bottle can manufacturing apparatus according to a third aspect of the present invention includes a spring that biases at least one of the cylindrical surface portion and the conical surface portion toward the die ring.

ネジ形成用ツールによるネジ形成加工の際に、有底筒状体をダイリングに押し付けて、有底筒状体を所定位置とすることができる。したがって、有底筒状体の保持位置が安定し、口金部の所定位置に安定してネジ形状を形成することが可能となり、巻き締め不良が生じにくい金属製ボトル缶を製造することができる。   At the time of the screw forming process by the screw forming tool, the bottomed cylindrical body can be pressed against the die ring to bring the bottomed cylindrical body into a predetermined position. Therefore, the holding position of the bottomed cylindrical body is stable, it is possible to stably form a screw shape at a predetermined position of the base part, and it is possible to manufacture a metal bottle can that is unlikely to cause winding failure.

以下、図を参照してこの発明の実施の形態について説明する。
まず、図において符号１０で示される、金属板から成形された有底筒状体Ｗをボトル缶形状に成形するためのボトル缶Ｂの製造装置について説明する。
この製造装置１０によって製造されるボトル缶Ｂは、炭酸飲料、果汁飲料などを入れるためのものであって、アルミニウムまたはアルミニウム合金の金属薄板から形成され、缶胴部よりも小径でネジ形状を有する口金部にキャップが装着されることにより密閉されるものである。 Embodiments of the present invention will be described below with reference to the drawings.
First, the manufacturing apparatus of the bottle can B for shape | molding the bottomed cylindrical body W shape | molded from the metal plate shown by the code | symbol 10 in a figure in a bottle can shape is demonstrated.
The bottle can B manufactured by the manufacturing apparatus 10 is for containing carbonated drinks, fruit juice drinks, etc., and is formed from a metal thin plate of aluminum or aluminum alloy, and has a screw shape with a smaller diameter than the can body. It is sealed by attaching a cap to the base part.

製造装置１０は、金属板から成形された有底筒状体（ワーク）Ｗを保持するワーク保持部２０と、この有底筒状体Ｗを成形加工する加工ツール３２を保持するツール保持部３０と、これら保持部２０，３０を駆動する駆動部１２とを有し、両保持部２０，３０のワーク保持側とツール保持側とが対向する配置となっていて、対向する位置の加工ツール３２によってワークＷに対する加工が施されるようになっている。   The manufacturing apparatus 10 includes a work holding unit 20 that holds a bottomed cylindrical body (work) W formed from a metal plate, and a tool holding unit 30 that holds a processing tool 32 that forms the bottomed cylindrical body W. And the drive unit 12 that drives the holding units 20 and 30, the work holding side and the tool holding side of the holding units 20 and 30 are opposed to each other, and the machining tool 32 at the opposed position. Thus, the workpiece W is processed.

ワーク保持部２０は、図２に示すように支持軸１１に支持された円板２１の片面に、ワークＷを保持する複数のダイリング２２が環状に配列されている構成となっている。この円板２１が駆動部１２によって間欠的に回転されることにより、供給部２３からワークＷがダイリング２２に供給されるとともに、成形されたボトル缶Ｂが排出部２４から順次排出される。なお図２では、円板２１の全周に設けられた複数のダイリング２２のうち一部を図示し、残りのダイリング２２の図示を省略している。   As shown in FIG. 2, the workpiece holding unit 20 has a configuration in which a plurality of die rings 22 that hold the workpiece W are arranged in a ring shape on one side of a disc 21 supported by the support shaft 11. When the disk 21 is intermittently rotated by the drive unit 12, the workpiece W is supplied from the supply unit 23 to the die ring 22, and the formed bottle can B is sequentially discharged from the discharge unit 24. In FIG. 2, some of the plurality of die rings 22 provided on the entire circumference of the disk 21 are illustrated, and the remaining die rings 22 are not illustrated.

ダイリング２２は、図３に示すように、ワークＷの底部がはめ込まれる皿状のダイリング本体２２Ａと、エアにより膨張してワークＷの缶胴部を締め付け保持するリング状中空弾性部材のチャック２２Ｂとで構成されている。   As shown in FIG. 3, the die ring 22 includes a dish-shaped die ring main body 22 </ b> A into which the bottom of the work W is fitted, and a ring-shaped hollow elastic member chuck that is inflated by air and holds the can body of the work W tightly. 22B.

ツール保持部３０は、支持軸１１に支持された円板３１の片側に、各種加工ツール３２が環状に配列されていて、駆動部１２によって円板３１が軸方向に進退するように構成されている。ツール保持部３０には、有底筒状体Ｗの開口部を縮径してテーパ部および口金部を成形する（ネックイン加工）ための多数の絞り型や、口金部にネジ形状を形成するネジ形成用ツール、開口端にカール部を形成するカール加工用ツール等の、各加工段階に応じた加工を行うための加工ツール３２が備えられており、これらの加工ツール３２が工程順に円板３１上に配列されている。各加工ツール３２は、ツール保持部３０が図１の左方に前進した際に、ワーク保持部２０に保持された各有底筒状体Ｗに対して加工を施すことができる。   The tool holding unit 30 is configured such that various processing tools 32 are annularly arranged on one side of the disk 31 supported by the support shaft 11, and the disk 31 is advanced and retracted in the axial direction by the drive unit 12. Yes. The tool holding portion 30 is formed with a number of drawing dies for reducing the diameter of the opening of the bottomed cylindrical body W to form a tapered portion and a base portion (neck-in processing), and a screw shape on the base portion. A processing tool 32 for performing processing according to each processing stage, such as a screw forming tool and a curling tool for forming a curled portion at the opening end, is provided. 31 are arranged. Each processing tool 32 can process each bottomed cylindrical body W held by the work holding unit 20 when the tool holding unit 30 advances to the left in FIG.

支持軸１１を回転中心とするワーク保持部２０（円板２１）の回転位置は、開口部をツール保持部３０側に向けた各有底筒状体Ｗの中心軸が各加工ツール３２の中心軸に一致するように設定される。そして、駆動部１２による円板２１の間欠的回転によって、各有底筒状体Ｗは次工程用の各加工ツール３２に対向する位置に回転されて、次の段階の加工が施されることになる。   The rotation position of the work holding part 20 (disk 21) with the support shaft 11 as the rotation center is such that the center axis of each bottomed cylindrical body W with the opening directed toward the tool holding part 30 is the center of each processing tool 32. Set to match the axis. And by the intermittent rotation of the disk 21 by the drive part 12, each bottomed cylindrical body W is rotated to the position facing each processing tool 32 for the next process, and the next stage processing is performed. become.

つまり、ツール保持部３０が前進してワーク保持部２０とツール保持部３０とが互いに接近したときに、各加工ツール３２が各工程に応じた加工をワークＷに対して施し、両保持部２０，３０が離れたときに各ワークＷに対して次工程の加工ツール３２が対向するようにワーク保持部２０が回転する。このように、両保持部２０，３０が接近して加工を行い、離れるとともに回転するという動作が繰り返されることにより、有底筒状体Ｗにはテーパ部、口金部、ネジ形状等が順次形成されてボトル缶Ｂとしての形状が付与されることになる。   That is, when the tool holding unit 30 moves forward and the workpiece holding unit 20 and the tool holding unit 30 approach each other, each processing tool 32 performs processing according to each process on the workpiece W, and both the holding units 20. , 30 is rotated, the work holding unit 20 is rotated so that the processing tool 32 of the next process faces each work W. In this way, by repeating the operation in which both holding portions 20 and 30 approach each other, move away and rotate, a bottomed cylindrical body W is sequentially formed with a tapered portion, a base portion, a screw shape, and the like. Thus, the shape of the bottle can B is given.

図３に、加工ツール３２の一つであるネジ形成用ツール４０を示す。ネジ形成用ツール４０は、円板３１に取り付けられた第１ハウジング４１と、第１ハウジング４１に対して進退自在に取り付けられた第２ハウジング４２とを有し、全体が図示しない駆動装置によって回転軸Ｏ周りに回転駆動される。   FIG. 3 shows a screw forming tool 40 that is one of the processing tools 32. The screw forming tool 40 includes a first housing 41 attached to the disk 31 and a second housing 42 attached to the first housing 41 so as to be movable forward and backward, and the whole is rotated by a driving device (not shown). It is driven to rotate around the axis O.

第２ハウジング４２は、図示しない付勢部材によって第１ハウジング４１に対して先端側（図の左方）に付勢保持されており、その内側にワークＷの口金部内周面に当接される中子４３Ａと外周面に当接される外子４３Ｂとを備えている。
これら中子４３Ａおよび外子４３Ｂは略円柱状の先端部外周面にネジ形状形成用の凹凸形状を有し、それぞれの軸を中心として回転自在であるとともに、第１ハウジング４１に対する第２ハウジング４２の位置に応じて径方向に移動するカムローラＣ１，Ｃ２によって径方向に移動されることにより、互いの凹凸形状間にワークＷの口金部を挟み込み変形させることができる。 The second housing 42 is biased and held on the distal end side (left side in the drawing) with respect to the first housing 41 by a biasing member (not shown), and is in contact with the inner peripheral surface of the base portion of the workpiece W inside. A core 43A and an outer core 43B that is in contact with the outer peripheral surface are provided.
The core 43A and the outer core 43B have an uneven shape for forming a screw shape on the outer peripheral surface of the substantially cylindrical tip portion, and are rotatable around their respective axes, and the second housing 42 with respect to the first housing 41. By moving in the radial direction by the cam rollers C1 and C2 that move in the radial direction according to the position, the base portion of the workpiece W can be sandwiched and deformed between the concave and convex shapes.

第２ハウジング４２の先端側に固定された第３ハウジング４４には、押さえ環４７が軸Ｏ中心に回転自在に取り付けられている。押さえ環４７には、バネ４５を介して先端側に付勢された弾性部材４６が取り付けられている。弾性部材４６は、ワークＷに形成されたテーパ部に沿う円錐面４６ａと缶胴部に沿う円筒面４６ｂとを有し、ワークＷに対してツール保持部３０（ネジ形成用ツール４０）が前進した際にワークＷに押し付けられるようになっている。   A pressing ring 47 is attached to the third housing 44 fixed to the distal end side of the second housing 42 so as to be rotatable about the axis O. An elastic member 46 that is biased toward the distal end side via a spring 45 is attached to the holding ring 47. The elastic member 46 has a conical surface 46a along the tapered portion formed on the workpiece W and a cylindrical surface 46b along the can body portion, and the tool holding portion 30 (screw forming tool 40) advances with respect to the workpiece W. When pressed, it is pressed against the workpiece W.

なお、符号２５はワーク保持部２０側に固定されたストッパー部材であって、このストッパー部材２５に押さえ環４７が当接することにより、押さえ環４７が固定された第３ハウジング４４、第２ハウジング４２およびその内側に備えられた中子４３Ａ，外子４３Ｂのワーク保持部２０（ダイリング２２）に対する軸方向最前進位置が決定される。   Reference numeral 25 denotes a stopper member fixed to the workpiece holding portion 20 side. When the pressing ring 47 comes into contact with the stopper member 25, the third housing 44 and the second housing 42 to which the pressing ring 47 is fixed. The axially most advanced positions of the core 43A and the outer core 43B provided on the inner side with respect to the work holding portion 20 (die ring 22) are determined.

つぎに、以上のように構成された製造装置１０によるボトル缶Ｂの製造について説明する。
まず、供給部２３によってダイリング２２に供給された際にワークＷは、円板２１の間欠的回転によって、各工程用にツール保持部３０に備えられた加工ツール３２に対向する各位置へと順次移動する。 Next, manufacturing of the bottle can B by the manufacturing apparatus 10 configured as described above will be described.
First, when the workpiece W is supplied to the die ring 22 by the supply unit 23, the workpiece W is moved to each position facing the processing tool 32 provided in the tool holding unit 30 for each process by intermittent rotation of the disk 21. Move sequentially.

円板２１の間欠回転とツール保持部３０の進退とが繰り返されることにより、各回転位置における際にワークＷに対して各工程の加工が施される。すなわち、有底円筒状のワークＷの開口部がネックイン加工により徐々に縮径されて、テーパ部および口金部形状が形成される。このネックイン加工によって、ワークＷは加工ツール３２によってツール保持部３０側に引き出されて、図３に示すようにダイリング２２から浮き上がった状態となっている。   By repeating the intermittent rotation of the disc 21 and the advancement / retraction of the tool holding unit 30, the workpiece W is processed in each step at each rotation position. That is, the opening of the bottomed cylindrical workpiece W is gradually reduced in diameter by neck-in processing to form the tapered portion and the base portion shape. By this neck-in processing, the workpiece W is pulled out to the tool holding unit 30 side by the processing tool 32 and is lifted from the die ring 22 as shown in FIG.

各種の加工を施されてテーパ部および口金部形状が形成されたワークＷに対して、図２に示す位置Ａにおいて、ネジ形成加工が施される。ネジ形成加工では、まず図３に示すように、ワーク保持部２０の前進により円筒面４６ｂがワークＷのテーパ部から缶胴部にはめ込まれる。
さらにワーク保持部２０が前進すると、図４に示すように弾性部材４６の円錐面４６ａがワークＷのテーパ部に押し付けられて、バネ４５の付勢力によってワークＷがダイリング２２に押し込まれて、図３に示す浮き上がりがなくなり、ワークＷがワーク保持部２０に対する所定の軸方向位置に移動する。 A thread forming process is performed at a position A shown in FIG. 2 on the workpiece W that has been subjected to various processes to form the tapered part and the base part shape. In the screw forming process, first, as shown in FIG. 3, the cylindrical surface 46 b is fitted into the can body portion from the tapered portion of the workpiece W by the advancement of the workpiece holding portion 20.
When the workpiece holding portion 20 further advances, the conical surface 46a of the elastic member 46 is pressed against the tapered portion of the workpiece W as shown in FIG. 4, and the workpiece W is pushed into the die ring 22 by the biasing force of the spring 45. The lift shown in FIG. 3 is eliminated, and the workpiece W moves to a predetermined axial position with respect to the workpiece holder 20.

ワーク保持部２０がさらに前進することにより、図５に示すようにバネ４５が圧し縮められながらさらにワークＷがダイリング２２に押し付けられ、押さえ環４７がストッパー部材２５に当接する。このストッパー部材２５と押さえ環４７との当接により、第２ハウジング４２および第３ハウジング４４の前進は停止され、さらにワーク保持部２０が前進することにより第１ハウジング４１と第２ハウジング４２との軸方向間隔が狭められる。   As the work holding portion 20 further advances, the work W is further pressed against the die ring 22 while the spring 45 is compressed and contracted as shown in FIG. 5, and the pressing ring 47 contacts the stopper member 25. Advancement of the second housing 42 and the third housing 44 is stopped by the abutment of the stopper member 25 and the holding ring 47, and further, the work holding unit 20 advances, whereby the first housing 41 and the second housing 42 are moved forward. Axial spacing is reduced.

第１ハウジング４１が所定位置にまで前進することにより、図６に示すように第２ハウジング４２に対して第１ハウジング４１が前進し、カムローラＣ１，Ｃ２が第１ハウジング４１の斜面４１ａ，４１ｂに沿ってそれぞれ移動して、中子４３Ａおよび外子４３Ｂを移動させる。これによってワークＷの口金部形状の内外周に前進していた中子４３Ａと外子４３Ｂとの間が互いに押圧され、さらにネジ形成用ツール４０全体が回転軸Ｏ周りに回転されて、ネジ形成加工が行われる。   As the first housing 41 moves forward to a predetermined position, the first housing 41 moves forward with respect to the second housing 42 as shown in FIG. 6, and the cam rollers C1 and C2 move to the inclined surfaces 41a and 41b of the first housing 41. The core 43 </ b> A and the outer core 43 </ b> B are moved along the respective positions. As a result, the core 43A and the outer core 43B that have advanced to the inner and outer circumferences of the base part shape of the work W are pressed against each other, and the entire screw forming tool 40 is rotated around the rotation axis O to form a screw. Processing is performed.

このネジ形成加工時には、上述したようにワークＷはワーク保持部２０に対して所定の軸方向位置にあり、ネジ形状を形成する中子４３Ａおよび外子４３Ｂも、ストッパー部材２５によってワーク保持部２０に対して所定の軸方向位置となっている。つまり、ワークＷと中子４３Ａおよび外子４３Ｂとは常に一定の位置関係となり、ワークＷの口金部ネジ山は、常に一定の高さに形成されることになる。   At the time of this screw forming process, as described above, the workpiece W is at a predetermined axial position with respect to the workpiece holding unit 20, and the core 43 </ b> A and the outer core 43 </ b> B that form the screw shape are also stopped by the stopper member 25. Is a predetermined axial position. That is, the workpiece W, the core 43A, and the outer core 43B are always in a fixed positional relationship, and the cap thread of the workpiece W is always formed at a fixed height.

上述したネジ形成加工の後、さらにワークＷに対してトリミング加工、カール加工等が行われることにより、ワークＷを成形して製造されたボトル缶Ｂは、排出部２４によって製造装置１０から排出される。   After the screw forming process described above, the bottle W produced by molding the work W is further discharged from the manufacturing apparatus 10 by the discharge unit 24 by performing trimming, curling, and the like on the work W. The

本発明の一実施形態による金属製ボトル缶の製造装置を示す模式図である。It is a schematic diagram which shows the manufacturing apparatus of the metal bottle cans by one Embodiment of this invention. 図１に示すII-II線に沿う矢視図である。It is an arrow line view which follows the II-II line | wire shown in FIG. 図１に示す製造装置の要部を示し、ネジ形成加工工程においてネジ形成用ツールの先端部が有底筒状体に接近した状態を示す断面図である。It is sectional drawing which shows the principal part of the manufacturing apparatus shown in FIG. 1, and shows the state which the front-end | tip part of the tool for screw formation approached the bottomed cylindrical body in the screw formation process. 図１に示す製造装置の要部を示し、ネジ形成加工工程において弾性部材が有底筒状体に当接した状態を示す断面図である。It is sectional drawing which shows the principal part of the manufacturing apparatus shown in FIG. 1, and shows the state which the elastic member contact | abutted to the bottomed cylindrical body in the screw formation process. 図１に示す製造装置の要部を示し、ネジ形成加工工程において弾性部材が有底筒状体をダイリングに押し付けた状態を示す断面図である。It is sectional drawing which shows the principal part of the manufacturing apparatus shown in FIG. 1, and shows the state which the elastic member pressed the bottomed cylindrical body against the die ring in the screw formation process. 図１に示す製造装置の要部を示し、ネジ形成加工時の状態を示す断面図である。It is sectional drawing which shows the principal part of the manufacturing apparatus shown in FIG. 1, and shows the state at the time of a screw formation process.

符号の説明Explanation of symbols

１０ 金属製ボトル缶の製造装置
２２ ダイリング
３０ ツール保持部
４０ ネジ形成用ツール
４５ バネ
４６ａ 円錐面（円錐面部）
４６ｂ 円筒面（円筒面部）
Ｂ ボトル缶
Ｗ ワーク（有底筒状体） DESCRIPTION OF SYMBOLS 10 Metal bottle can manufacturing apparatus 22 Die ring 30 Tool holding part 40 Screw formation tool 45 Spring 46a Conical surface (conical surface part)
46b Cylindrical surface (cylindrical surface)
B Bottle can
W Workpiece (bottomed cylindrical body)

Claims (3)

有底筒状体の底部をダイリングに保持した状態で、該有底筒状体を成形して金属製ボトル缶を製造する方法であって、
前記有底筒状体の開口部を縮径してテーパ部および口金部を成形するネッキング加工工程と、前記口金部にネジ形状を成形するネジ形成加工工程とを有し、
前記ネジ形成加工工程では、前記有底筒状体の胴部及びテーパ部の少なくとも一方を前記ダイリングに対して押しつけながらネジ形成加工が行われることを特徴とする金属製ボトル缶の製造方法。 In a state where the bottom of the bottomed cylindrical body is held by a die ring, the bottomed cylindrical body is molded to produce a metal bottle can,
A necking process for forming a tapered part and a base part by reducing the diameter of the opening of the bottomed cylindrical body, and a screw forming process for forming a screw shape in the base part,
In the screw forming process, the screw forming process is performed while pressing at least one of the body part and the taper part of the bottomed cylindrical body against the die ring. ネッキング加工によって開口部を縮径してテーパ部および口金部が成形された有底筒状体の底部を保持するダイリングと、前記口金部にネジ形状を成形するネジ形成用ツールとを備え、前記有底筒状体をボトル缶に成形する金属製ボトル缶の製造装置であって、
前記ネジ形成用ツールは、前記有底筒状体の開口部に対向するとともに軸方向に相対的に進退可能に設けられ、その軸方向移動によって、前記有底筒状体の胴部にはめこまれる円筒面部及び前記テーパ部に押し付けられる円錐面部の少なくとも一方を備えていることを特徴とする金属製ボトル缶の製造装置。 A die ring that holds the bottom of the bottomed cylindrical body in which the diameter of the opening is reduced by necking to form the tapered portion and the base, and a screw forming tool that forms a screw shape in the base, A metal bottle can manufacturing apparatus for forming the bottomed cylindrical body into a bottle can,
The screw forming tool is provided so as to face the opening of the bottomed cylindrical body and be relatively movable in the axial direction, and is fitted into the body of the bottomed cylindrical body by moving in the axial direction. An apparatus for producing a metal bottle can comprising at least one of a cylindrical surface portion and a conical surface portion pressed against the tapered portion. 前記円筒面部及び前記円錐面部の少なくとも一方を前記ダイリング側へと付勢するバネを備えていることを特徴とする請求項２に記載の金属製ボトル缶の製造装置。   The apparatus for manufacturing a metal bottle can according to claim 2, further comprising a spring that biases at least one of the cylindrical surface portion and the conical surface portion toward the die ring side.
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WO2011093601A2 (en) * 2010-01-28 2011-08-04 (주)파세코 Apparatus for processing sealing lip of metallic can, and metallic can processed by said apparatus
KR101061361B1 (en) 2010-01-28 2011-09-01 주식회사 파세코 Seal lip processing apparatus for metallic cans and metallic cans processed by the processing apparatus
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JP2018075634A (en) * 2016-11-01 2018-05-17 ユニバーサル製缶株式会社 Can molding equipment

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KR101029549B1 (en) 2009-03-31 2011-04-15 신성정밀공업주식회사 Necking device and method of square can
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WO2011093601A2 (en) * 2010-01-28 2011-08-04 (주)파세코 Apparatus for processing sealing lip of metallic can, and metallic can processed by said apparatus
KR101061361B1 (en) 2010-01-28 2011-09-01 주식회사 파세코 Seal lip processing apparatus for metallic cans and metallic cans processed by the processing apparatus
WO2011093601A3 (en) * 2010-01-28 2011-11-17 (주)파세코 Apparatus for processing sealing lip of metallic can, and metallic can processed by said apparatus
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JP2013510005A (en) * 2010-01-28 2013-03-21 パセコ・カンパニー・リミテッド Metal can sealing lip processing device and metal can processed by the processing device
JP2018075634A (en) * 2016-11-01 2018-05-17 ユニバーサル製缶株式会社 Can molding equipment

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