JP4706889B2 - Can body forming equipment - Google Patents

Can body forming equipment Download PDF

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Publication number
JP4706889B2
JP4706889B2 JP2000334531A JP2000334531A JP4706889B2 JP 4706889 B2 JP4706889 B2 JP 4706889B2 JP 2000334531 A JP2000334531 A JP 2000334531A JP 2000334531 A JP2000334531 A JP 2000334531A JP 4706889 B2 JP4706889 B2 JP 4706889B2
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outer mold
mold
hydraulic
head
forming apparatus
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JP2002137031A (en
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章 岡田
永成 伊藤
謹一 荒木
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Toyo Seikan Kaisha Ltd
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Toyo Seikan Kaisha Ltd
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Description

【0001】
【発明の属する技術分野】
この発明は、缶胴成形装置に関し、大径の缶胴に対しても立体形状を簡単に成形できるようにしたものである。
【0002】
【従来の技術】
飲料用や食品用などをはじめとする包装容器として用いられる缶に立体模様を付与するため缶胴に成形加工を施すことが行われており、例えば図3に示すように、缶胴1の上下に2つの膨らみ2をつけた缶3や缶胴1の上部のみに膨らみ2をつけた缶4、あるいは缶胴1に立体模様5をつけた缶6,7などが用いられている。
【0003】
このような缶胴1に立体模様を成形加工する加工法としては、従来の割りづめ式と呼ばれる放射方向に複数に分割された割り型を用いる加工法に代わり、割づめによる缶内部の傷を防止することができる加工法として、ゴムと液圧を利用した成形法が開発されており、例えば図4に特開平9−10873号公報に記載の装置10を示すように、膨らみ2や立体模様5などが形成された一対の外型11にトグルプレス機構12を連結して外型11の開閉と型締力を付与するようにし、このトグルプレス機構12で開かれた外型11内に筒状の缶胴1を設置して外型11を閉じた後、例えば図5に示すように、缶胴1内に筒状のゴム13の両端を密封状態で取り付けた成形ヘッド14を挿入し、この成形ヘッド14内に水圧供給装置15を構成するエアシリンダ16で駆動される水圧ポンプ17から水圧を供給してゴム13を膨らませることで、缶胴1を外型11の内面に押し付けて外型11の立体模様を成形加工するようにしている。
【0004】
このような缶胴成形装置10によれば、割りづめによる傷が缶胴1の内面につくこともなく滑らかな立体模様を形成することができる。
【0005】
【発明が解決しようとする課題】
ところが、このような缶胴成形装置10で、大径の缶胴1に立体模様を成形しようとすると、缶胴1の口径が大きくなるにしたがって、次のような問題が生じる。
【0006】
▲1▼ 外型11の開閉と型締力の付与をトグルプレス機構12で行うようにしているが、缶胴1の口径が大きくなるにしたがい、外型11の開閉に必要な距離が大きくなるとともに、成形に要する水圧の増大に対して型締力が不足したり、構造上の耐力が不足する。
【0007】
▲2▼ 筒状のゴム13が取り付けられた成形ヘッド14は装置本体18の上部から吊り下げられた構造で、開閉する外型11の中心部に配置されていることから、缶胴1の口径が大きくなると、缶胴1内に挿入する成形ヘッド14も大きく、重くなり、成形ヘッド14の取り付けや取り外し作業が大変になるとともに、成形ヘッド14の装置本体18への支持も大変で不安定になりやすい。
【0008】
▲3▼ 缶胴成形時に必要となる成形ヘッド14への水圧は、水圧供給装置15のエアシリンダ16で駆動される水圧ポンプ17によって供給するようにしているが、必要な水量の増大に伴い水圧ポンプ17を駆動するために必要なエアシリンダ16へのエアの供給量が膨大となり、例えば水圧供給装置15として4組のエアシリンダ16と水圧ポンプ17が必要で大容量のエアコンプレッサが必要になる。
【0009】
この発明はかかる従来技術の有する課題を解決するためになされたもので、口径の大きい缶胴に対しても液圧を利用して立体模様を簡単に成形することができる缶胴成形装置を提供しようとするものである。
【0010】
【課題を解決するための手段】
上記従来技術が有する課題を解決するためこの発明の請求項1記載の缶胴成形装置は、立体形状が形成された一対の割外型を有する外型に設置した缶胴部内に成形ヘッドを挿入して加圧流体で膨らませて缶胴を成形する装置であって、前記外型の型締機構を、前記外型に連結されて開閉駆動する第1流体圧シリンダと、この第1流体圧シリンダで型締された外型の背面に前記外型の開閉方向のそれぞれと交差して挿脱される型締ブロックと、前記外型の背面に挿入された前記型締ブロックを介して前記外型に型締力を付与する第2流体圧シリンダとで構成したことを特徴とするものである。
【0011】
この缶胴成形装置によれば、立体形状が形成された一対の割外型を有する外型に設置した缶胴部内に成形ヘッドを挿入して加圧流体で膨らませて缶胴を成形する装置で、前記外型の型締機構を、前記外型に連結されて開閉駆動する第1流体圧シリンダと、この第1流体圧シリンダで型締された外型の背面に前記外型の開閉方向のそれぞれと交差して挿脱される型締ブロックと、前記外型の背面に挿入された前記型締ブロックを介して前記外型に型締力を付与する第2流体圧シリンダとで構成しており、エアシリンダなどの第1流体圧シリンダで一対の割外型を有する外型の開閉を行い、閉じられた外型の背面から前記外型の開閉方向のそれぞれと交差して挿脱される型締ブロックを介して油圧シリンダ等の第2流体圧シリンダで型締力を付与することで、外型の開閉と型締力の付与とを分離でき、機構の小型化を図りつつ必要な大きな型締力を得ることができるようにしている。
【0012】
また、この発明の請求項2記載の缶胴成形装置は、前記請求項1記載の構成に加え、前記成形ヘッドを装置本体から上方に突出して設置し、前記缶胴部を上方から被せる構造としたことを特徴とするものである。
【0013】
この缶胴成形装置によれば、前記成形ヘッドを装置本体から上方に突出して設置し、前記缶胴部を上方から被せる構造としており、吊り下げ構造に比べて成形ヘッドの取り付けや取り外し作業が容易となるとともに、大きく重い成形ヘッドであっても簡単かつ安定に取り付けることができるようになる。
【0014】
さらに、この発明の請求項3記載の缶胴成形装置は、前記請求項1または2記載の構成に加え、前記成形ヘッドに供給される加圧流体の供給手段を、前記加圧流体としての水圧を発生する水圧ポンプと、この水圧ポンプを駆動する油圧シリンダとで構成したことを特徴とするものである。
【0015】
この缶胴成形装置によれば、前記成形ヘッドに供給される加圧流体の供給手段を、前記加圧流体としての水圧を発生する水圧ポンプと、この水圧ポンプを駆動する油圧シリンダとで構成するようにしており、水圧ポンプを油圧シリンダで駆動することで、エアシリンダで水圧ポンプを駆動する場合に必要なエアコンプレッサに比べて加圧流体の供給手段をコンパクト化でき、しかもコンプレッサの駆動電力に比べて油圧シリンダを駆動するのに必要な油圧モータなどの駆動電力を大巾に削減することができるようになる。
【0016】
【発明の実施の形態】
以下、この発明の缶胴成形装置の一実施の形態について図面に基づき詳細に説明する。
図1および図2はこの発明の缶胴成形装置の一実施の形態にかかり、図1は概略平面図、図2は成形ヘッド部分の概略縦断面図で、それぞれ左半分を型開き状態で、右半分を型閉め状態で示してある。
【0017】
この缶胴成形装置20では、水平な架台21上に1対の外型ホルダ22,22aが対向して開閉可能に設けられ、これら1対の外型ホルダ22,22aの対向面に1対の割外型23,23aが取り付けられて立体形状のキャビティが対向している。そして、この1対の割外型23,23aを開閉して型閉め、型開きを行うとともに、型締力を付与するため型締機構24が設けられるが、ここでは、割外型23,23aの開閉駆動と型締力の付与とを分離独立させ、機構のコンパクト化および駆動エネルギの削減を図るようにしている。
【0018】
この型締機構24は、図1および図2に示すように、1対の外型ホルダ22,22aの後方に配置された支持台25,25aを備えており、支持台25,25aは架台21に固定されるとともに、互いがタイロッド26で連結され、型締力を支持できる剛性が確保できるようになっている。
【0019】
これら支持台25,25aの後方に開閉用支持台27,27aが配置されて架台21に固定され、これら開閉用支持台27,27aに割外型23,23aを開閉する第1流体圧シリンダとしてのエアシリンダ28,28aが取り付けられ、それぞれのロッドが支持台25,25aを貫通して外型ホルダ22,22aの背面に連結してある。
【0020】
したがって、これらエアシリンダ28,28aのロッドを伸縮することで外型ホルダ22,22aに取り付けられた割外型23,23aを型閉めしたり、型開きすることができ、成形対象の缶胴1が大径となり割外型23,23aの開閉距離が大きくなってもストロークの長いエアシリンダ28,28aを用いることで対応できるとともに、型締力を考慮すること無く、割外型23,23aの開閉に必要な駆動力を得ることができる小容量のエアシリンダが用いられている。
【0021】
こうしてエアシリンダ28,28aで開閉される割外型23,23aに型締力を付与するため、支持台25,25aに第2流体圧シリンダとして油圧シリンダ29,29aがそれぞれ4個ずつ取り付けられ、外型ホルダ22,22aの背面の上下左右の4か所と対向するように配置してあり、これら油圧シリンダ29,29aは支持台25,25aに埋設された状態とされ、ロッド先端が僅かに突き出すようになっており、ストロークは短いものの成形に必要な型締力を4個2組で付与できるものが用いてある。
【0022】
したがって、エアシリンダ28,28aで型閉めした外型ホルダ22,22aの背面と支持台25,25aに取り付けた油圧シリンダ29,29aのロッド先端との間には、割外型23,23aの開閉距離に相当する空間が形成されることになる。
【0023】
そこで、この外型ホルダ22,22aの背面と油圧シリンダ29,29aのロッド先端との空間に割外型の開閉方向と交差する左右から1対の型締ブロック30,30aをそれぞれ挿脱できるようにしてあり、挿脱用エアシリンダ31,31aで往復駆動できるようにしてある。
【0024】
これにより、エアシリンダ28,28aで型閉めした外型ホルダ22,22aの背面と支持台25,25aに取り付けた油圧シリンダ29,29aのロッド先端との間に左右から1対の型締ブロック30,30aを挿脱用エアシリンダ31,31aで挿入することで隙間をほとんどなくすことができ、この状態で油圧シリンダ29,29aのロッドを僅かに伸長することで型締力を付与することができる。
【0025】
また、割外型23,23aを型開きする場合には、油圧シリンダ29,29aによる型締力の付与を開放した後、型締ブロック30,30aを挿脱用エアシリンダ31,31aで後退させるとともに、エアシリンダ28,28aで外型ホルダ22,22aごと後退させることで行うことができる。
【0026】
次に、このような割外型23,23aの内部に配置された缶胴1内に挿入される成形ヘッド40について説明する。
【0027】
この成形ヘッド40は、図2に示すように、大径の缶胴1の成形にも対応できるようにしたもので、装置本体を構成する架台21に略円柱状のヘッド本体41が上方に突き出すように配置され、架台21に取り付けたつば付きナット42にヘッド本体41のねじ部43をねじ込んで固定ナット44で締付けることで架台21に対して上下の位置を調整して固定できるようになっている。
【0028】
このヘッド本体41の上端部には、薄膜弾性部材45の上端を取り付けるための太鼓状の取付面を備えた上端固定部46が一体に形成されるとともに、ヘッド本体41の中間部に別に形成した太鼓状の取付面を備えた下端固定部材47が取り付けられる一方、これら上端固定部46と下端固定部材47の外側に上下に凹部が形成され、その内周に薄膜弾性部材45を押さえる突条48aが形成された筒状押え部材48が配置されており、上端固定部46と筒状押え部材48の間および下端固定部材47と筒状押え部材48の間に薄膜弾性部材45の上下端部を挾んで固定ナット49で締付けることで、薄膜弾性部材45を密封状態で取り付けることができるようになっている。
【0029】
そして、この薄膜弾性部材45の内側に加圧流体としての加圧水を供給するため、ヘッド本体41の中心部に下端から薄膜弾性部材45の中央部まで加圧流体流路50が形成され、この上端に連通して放射方向に複数の加圧流体流路51が形成され、これら加圧流体流路51が筒状押え部材48に形成した加圧流体室52に連通するとともに、筒状押え部材48を貫通する加圧流体流路53を介して薄膜弾性部材45の内側と連通している。また、加圧流体を下方から供給する構造としたので、加圧流体室52には、ヘッド本体41の上端面から連通する空気抜き54が形成してあり、運転開始前に空気を抜くことができ、その後プラグ55で栓をするようになっている。
【0030】
また、このような成形ヘッド40に成形対象である缶胴1を上方から被せるように装着して支持するため、成形ヘッド40のヘッド本体41の中間部にねじ56が形成され、缶胴受けリング57がねじ込まれて缶胴1の下端面を支持することができるようになっており、缶胴受けリング57の位置もねじによって調整できるようになっている。
【0031】
また、この成形ヘッド40に加圧流体である加圧水を供給して薄膜弾性部材45を膨らまして成形するため加圧流体供給手段60が備えてあり、図2に示すように、往復動式の水圧ポンプ61が油圧シリンダ62に連結されて駆動されるようになっている。そして、この油圧シリンダ62には、油圧発生ユニット63から油圧が供給されるようになっており、油圧発生ユニット63はモータで駆動される油圧ポンプで構成され、圧力スイッチ64で加圧水の圧力を検出し、モータ等が制御される。なお、図中、65はエア抜きのためのハンドポンプであり、ストップバルブ66を介して接続してある。
【0032】
このような油圧発生ユニット63を用いることで、大径の缶胴1を成形加工する場合、これまでの水圧ポンプをエアシリンダで駆動するときに必要とされる圧縮空気をモータで駆動するコンプレッサから得る場合に比べ、同一の加圧水量を得る場合に必要な電力を大巾に削減することができるとともに、4組のエアシリンダと水圧ポンプが必要なところを1組の油圧シリンダ62と水圧ポンプ61だけで対応することができた。
【0033】
このように構成した缶胴成形装置20による缶胴の立体形状の成形について説明する。
まず、割外型23,23aを型開きした状態として、図示しない搬送装置で缶胴1を搬送し、底を上にして成形ヘッド40に被せるようにして缶胴受けリング57上に装着する。
【0034】
この後、エアシリンダ28,28aのロッドを伸長することで外型ホルダ22,22aに取り付けられた割外型23,23aを型閉めし、外型ホルダ22,22aの背面に左右から1対の型締ブロック30,30aを挿脱用エアシリンダ31,31aのロッドを伸長して挿入することで油圧シリンダ29,29aとの空間をほとんどなくした状態とする。
【0035】
次いで、油圧シリンダ29,29aのロッドを伸長して型締力を付与する。こうして型締めが完了した後、成形ヘッド40の薄膜弾性部材45の内側に水圧ポンプ61から加圧水を供給して膨らませることで、割外型23,23aに形成した立体形状を缶胴1に加工する。
【0036】
加工後は、上記成形の場合と逆の手順で型締力の開放、型開き、製品の取り出しを行って一連の缶胴1への立体形状の成形が完了する。
【0037】
このような缶胴成形装置20によれば、割外型23,23aの開閉をエアシリンダ28,28aで行い、型閉め後、型締ブロック30,30aを挿脱用エアシリンダ31,31aで挿入し、油圧シリンダ29,29aで型締力を付与するようにしたので、大径缶の缶胴1を成形する場合にも十分な型締力および耐圧力を得ることができるととともに、エアシリンダと油圧シリンダを組み合わせて型締機構24を構成したので、機構を小型コンパクト化することができ、作業の安全性も向上する。
【0038】
さらに、大径缶の成形にともなって割外型23,23aが大きくなっても型締ブロック30,30aを介して油圧シリンダ29,29aで型締力を付与するようにしたので、従来のトグルプレス機構に比べ、割外型23,23a全体に均一な型締力を加えることができる。
【0039】
また、この缶胴成形装置20によれば、成形ヘッド40を装置本体である架台21に取り付けて上方に突き出す構造としたので、大径缶の成形の場合のように成形ヘッド40が大型化する場合でも安定して固定できるとともに、成形ヘッド40の交換が容易となるとともに、位置調整も容易となる。
【0040】
さらに、この缶胴成形装置20によれば、成形ヘッド40に供給する加圧水を油圧シリンダ62で駆動する水圧ポンプ61で発生するようにしたので、大径缶を成形する場合に必要な加圧水量を1組の水圧ポンプと油圧シリンダで確保することができるとともに、油圧発生ユニット63を小型化して電力消費を抑えることができる。
【0041】
【発明の効果】
以上、一実施の形態とともに具体的に説明したように、この発明の請求項1記載の缶胴成形装置によれば、立体形状が形成された一対の割外型を有する外型に設置した缶胴部内に成形ヘッドを挿入して加圧流体で膨らませて缶胴を成形する装置で、前記外型の型締機構を、前記外型に連結されて開閉駆動する第1流体圧シリンダと、この第1流体圧シリンダで型締された外型の背面に前記外型の開閉方向のそれぞれと交差して挿脱される型締ブロックと、前記外型の背面に挿入された前記型締ブロックを介して前記外型に型締力を付与する第2流体圧シリンダとで構成したので、エアシリンダなどの第1流体圧シリンダで一対の割外型を有する外型の開閉を行い、閉じられた外型の背面から前記外型の開閉方向のそれぞれと交差して挿脱される型締ブロックを介して油圧シリンダ等の第2流体圧シリンダで型締力を付与することで、外型の開閉と型締力の付与とを分離でき、機構の小型化を図りつつ必要な大きな型締力を得ることができる。
【0042】
また、この発明の請求項2記載の缶胴成形装置によれば、前記成形ヘッドを装置本体から上方に突出して設置し、前記缶胴部を上方から被せる構造としたので、吊り下げ構造に比べて成形ヘッドの取り付けや取り外し作業が容易となるとともに、大きく重い成形ヘッドであっても簡単かつ安定に取り付けることができる。
【0043】
さらに、この発明の請求項3記載の缶胴成形装置によれば、前記成形ヘッドに供給される加圧流体の供給手段を、前記加圧流体としての水圧を発生する水圧ポンプと、この水圧ポンプを駆動する油圧シリンダとで構成するようにしたので、水圧ポンプを油圧シリンダで駆動することで、エアシリンダで水圧ポンプを駆動する場合に必要なエアコンプレッサに比べて加圧流体の供給手段をコンパクト化でき、しかもコンプレッサの駆動電力に比べて油圧シリンダを駆動するのに必要な油圧モータなどの駆動電力を大巾に削減することができる。
これらにより、大径缶であっても簡単に缶胴に立体形状を成形することができる。
【図面の簡単な説明】
【図1】この発明の缶胴成形装置の一実施の形態にかかる概略平面図で、左半分を型開き状態で、右半分を型閉め状態で示したものである。
【図2】この発明の缶胴成形装置の一実施の形態にかかる成形ヘッド部分の概略縦断面図で、左半分を型開き状態で、右半分を型閉め状態で示したものである。
【図3】この発明の缶胴成形装置により成形する立体形状の例を示す斜視図である。
【図4】従来の缶胴成形装置の概略平面図で、左半分を型開き状態で、右半分を型閉め状態で示したものである。
【図5】従来の成形ヘッド部分の概略縦断面図である。
【符号の説明】
1 缶胴
20 缶胴成形装置
21 架台(装置本体)
22,22a 外型ホルダ
23,23a 割外型
24 型締機構
25,25a 支持台
26 タイロッド
27,27a 開閉用支持台
28,28a エアシリンダ(第1流体圧シリンダ)
29,29a 油圧シリンダ(第2流体圧シリンダ)
30,30a 型締ブロック
31,31a 挿脱用シリンダ
40 成形ヘッド
41 ヘッド本体
45 薄膜弾性部材
52 加圧流体室
54 空気抜き
55 プラグ
60 加圧流体供給手段
61 水圧ポンプ
62 油圧シリンダ
63 油圧発生ユニット
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a can body forming apparatus, which can easily form a three-dimensional shape even for a large diameter can body.
[0002]
[Prior art]
In order to give a three-dimensional pattern to cans used as packaging containers for beverages, foods, etc., the can body is subjected to a molding process. For example, as shown in FIG. A can 3 having two bulges 2, a can 4 having the bulge 2 only on the top of the can body 1, or cans 6 and 7 having a three-dimensional pattern 5 on the can body 1 are used.
[0003]
As a processing method for forming a three-dimensional pattern on such a can body 1, instead of a conventional processing method using a split mold that is divided into a plurality of radial directions, which is called a split type, scratches inside the can due to the split are removed. As a processing method that can be prevented, a molding method using rubber and hydraulic pressure has been developed. For example, as shown in FIG. 4 of the apparatus 10 described in Japanese Patent Laid-Open No. 9-10873, a bulge 2 or a three-dimensional pattern is used. A toggle press mechanism 12 is connected to a pair of outer molds 11 formed with 5 or the like to provide opening / closing and clamping force of the outer mold 11, and a cylinder is placed in the outer mold 11 opened by the toggle press mechanism 12. After installing the can body 1 and closing the outer mold 11, for example, as shown in FIG. 5, a molding head 14 in which both ends of a cylindrical rubber 13 are attached in a sealed state is inserted into the can body 1, A water pressure supply device 15 is configured in the molding head 14. By supplying water pressure from a water pressure pump 17 driven by an air cylinder 16 to inflate the rubber 13, the can body 1 is pressed against the inner surface of the outer mold 11 to mold the three-dimensional pattern of the outer mold 11. .
[0004]
According to such a can body forming apparatus 10, it is possible to form a smooth three-dimensional pattern without causing scratches on the inner surface of the can body 1.
[0005]
[Problems to be solved by the invention]
However, when the can body forming apparatus 10 tries to form a three-dimensional pattern on the large-diameter can body 1, the following problems occur as the diameter of the can body 1 increases.
[0006]
(1) The outer die 11 is opened and closed and the clamping force is applied by the toggle press mechanism 12. However, as the diameter of the can body 1 increases, the distance necessary for opening and closing the outer die 11 increases. At the same time, the mold clamping force is insufficient or the structural strength is insufficient with respect to an increase in water pressure required for molding.
[0007]
(2) The molding head 14 to which the cylindrical rubber 13 is attached has a structure suspended from the upper part of the apparatus main body 18 and is arranged at the center of the outer mold 11 that opens and closes. Is increased, the molding head 14 to be inserted into the can body 1 becomes larger and heavier, and the mounting and removal of the molding head 14 becomes difficult, and the support of the molding head 14 to the apparatus main body 18 is very difficult and unstable. Prone.
[0008]
{Circle around (3)} The water pressure to the forming head 14 required when forming the can body is supplied by the water pressure pump 17 driven by the air cylinder 16 of the water pressure supply device 15. The amount of air supplied to the air cylinder 16 necessary for driving the pump 17 becomes enormous. For example, the air pressure supply device 15 requires four air cylinders 16 and the water pressure pump 17 and requires a large capacity air compressor. .
[0009]
The present invention has been made to solve the problems of the prior art, and provides a can body forming apparatus that can easily form a three-dimensional pattern using a hydraulic pressure even for a can body having a large diameter. It is something to try.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problems of the prior art, the can body forming apparatus according to claim 1 of the present invention inserts a forming head into a can body portion installed in an outer mold having a pair of split molds in which a three-dimensional shape is formed. And forming a can body by inflating with a pressurized fluid, wherein the outer mold clamping mechanism is connected to the outer mold and driven to open and close, and the first fluid pressure cylinder the outer mold in through the clamping blocks inserted and removed to intersect with each of the outer die opening and closing direction on the back of the clamping has an outer mold, the mold clamping block that is inserted into the back of the outer mold And a second fluid pressure cylinder that imparts a mold clamping force.
[0011]
According to this can body forming apparatus, an apparatus for forming a can body by inserting a forming head into a can body portion installed in an outer mold having a pair of outer molds having a three-dimensional shape and inflating with a pressurized fluid. The outer mold clamping mechanism is connected to the outer mold and driven to open and close, and the outer mold is clamped by the first fluid pressure cylinder on the back surface of the outer mold in the opening / closing direction of the outer mold . and clamping blocks inserted and removed to intersect with each, and composed of a second hydraulic cylinder for imparting the clamping force to the outer die through an inserted said clamping block to the back of the outer mold And a first fluid pressure cylinder such as an air cylinder opens and closes the outer mold having a pair of split molds, and is inserted / removed from the back surface of the closed outer mold so as to intersect each of the opening / closing directions of the outer mold. Clamping force is applied by a second hydraulic cylinder such as a hydraulic cylinder through a clamping block In Rukoto, so that it can be separated and the outer mold closing and mold clamping force applying to obtain a large clamping force required while reducing the size of the mechanism.
[0012]
According to a second aspect of the present invention, in addition to the configuration of the first aspect, the can body forming apparatus is configured such that the forming head protrudes upward from the apparatus main body and covers the can body portion from above. It is characterized by that.
[0013]
According to this can body forming apparatus, the forming head is installed so as to protrude upward from the apparatus main body, and the can body portion is covered from above, so that the attaching and detaching operations of the forming head are easier than the hanging structure. At the same time, even a large and heavy molding head can be easily and stably attached.
[0014]
Further, in the can body forming apparatus according to claim 3 of the present invention, in addition to the structure according to claim 1 or 2, the supply means of the pressurized fluid supplied to the forming head is a water pressure as the pressurized fluid. It is characterized by comprising a hydraulic pump that generates the pressure and a hydraulic cylinder that drives the hydraulic pump.
[0015]
According to this can body forming apparatus, the supply means for the pressurized fluid supplied to the forming head is composed of a hydraulic pump that generates water pressure as the pressurized fluid and a hydraulic cylinder that drives the hydraulic pump. By driving the hydraulic pump with a hydraulic cylinder, the means for supplying pressurized fluid can be made compact compared to the air compressor required when the hydraulic pump is driven with an air cylinder, and the drive power of the compressor is reduced. In comparison, it is possible to greatly reduce the driving power of a hydraulic motor or the like necessary for driving the hydraulic cylinder.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of a can body forming apparatus according to the present invention will be described in detail with reference to the drawings.
1 and 2 relate to an embodiment of a can body forming apparatus according to the present invention. FIG. 1 is a schematic plan view, FIG. 2 is a schematic longitudinal sectional view of a forming head portion, The right half is shown closed.
[0017]
In the can body forming apparatus 20, a pair of outer mold holders 22 and 22a are provided on a horizontal base 21 so as to be openable and closable, and a pair of outer mold holders 22 and 22a is provided on a facing surface of the pair of outer mold holders 22 and 22a. The split molds 23 and 23a are attached and the three-dimensional cavities face each other. The pair of extra molds 23, 23a are opened and closed to close the mold, open the mold, and a mold clamping mechanism 24 is provided to apply a mold clamping force. Here, the extra molds 23, 23a are provided. The opening / closing drive and the application of the clamping force are separated and independent, so that the mechanism is made compact and the drive energy is reduced.
[0018]
As shown in FIGS. 1 and 2, the mold clamping mechanism 24 includes support bases 25 and 25a disposed behind the pair of outer mold holders 22 and 22a. In addition to being fixed to each other, the tie rods 26 are connected to each other so that rigidity capable of supporting the mold clamping force can be secured.
[0019]
Opening and closing support bases 27 and 27a are disposed behind the support bases 25 and 25a and fixed to the gantry 21. The first hydraulic cylinders open and close the split molds 23 and 23a on the opening and closing support bases 27 and 27a. The air cylinders 28 and 28a are attached, and the respective rods pass through the support bases 25 and 25a and are connected to the back surfaces of the outer holders 22 and 22a.
[0020]
Therefore, by extending and retracting the rods of the air cylinders 28 and 28a, the split molds 23 and 23a attached to the outer mold holders 22 and 22a can be closed or opened, and the can body 1 to be molded can be opened. Can be dealt with by using the air cylinders 28 and 28a having a long stroke, and without considering the clamping force, even if the open / close distance of the split molds 23 and 23a becomes large. A small-capacity air cylinder capable of obtaining a driving force necessary for opening and closing is used.
[0021]
Thus, in order to apply a clamping force to the split molds 23 and 23a opened and closed by the air cylinders 28 and 28a, four hydraulic cylinders 29 and 29a are attached to the support bases 25 and 25a, respectively, as second fluid pressure cylinders. The hydraulic cylinders 29 and 29a are embedded in the support bases 25 and 25a so that the four ends of the upper and lower left and right sides of the outer mold holders 22 and 22a are opposed to each other. Although it is designed to protrude, it has a short stroke, but it is possible to apply the clamping force necessary for molding in two sets of four.
[0022]
Therefore, the open / close molds 23 and 23a are opened and closed between the back surfaces of the outer mold holders 22 and 22a closed with the air cylinders 28 and 28a and the rod ends of the hydraulic cylinders 29 and 29a attached to the support bases 25 and 25a. A space corresponding to the distance is formed.
[0023]
Therefore, the pair of mold clamping blocks 30 and 30a can be inserted into and removed from the space between the back surface of the outer mold holders 22 and 22a and the rod ends of the hydraulic cylinders 29 and 29a from the left and right sides intersecting the opening / closing direction of the outer mold. It can be reciprocated by the insertion / removal air cylinders 31 and 31a.
[0024]
Thus, a pair of mold clamping blocks 30 from the left and right between the back surfaces of the outer mold holders 22 and 22a closed by the air cylinders 28 and 28a and the rod ends of the hydraulic cylinders 29 and 29a attached to the support bases 25 and 25a. , 30a are inserted by the insertion / removal air cylinders 31, 31a, so that almost no gap can be eliminated. In this state, the rods of the hydraulic cylinders 29, 29a are slightly extended to provide a clamping force. .
[0025]
Further, when the split molds 23 and 23a are opened, the mold clamping blocks 30 and 30a are retracted by the insertion / removal air cylinders 31 and 31a after releasing the application of the mold clamping force by the hydraulic cylinders 29 and 29a. At the same time, it can be performed by retracting the outer mold holders 22 and 22a together with the air cylinders 28 and 28a.
[0026]
Next, the forming head 40 that is inserted into the can body 1 arranged inside the split molds 23 and 23a will be described.
[0027]
As shown in FIG. 2, the molding head 40 is adapted to cope with molding of a large-diameter can body 1, and a substantially cylindrical head main body 41 protrudes upward from a gantry 21 constituting the apparatus main body. The screw portion 43 of the head main body 41 is screwed into a nut 42 with a collar attached to the gantry 21 and tightened with a fixing nut 44 so that the vertical position of the gantry 21 can be adjusted and fixed. Yes.
[0028]
An upper end fixing portion 46 having a drum-shaped attachment surface for attaching the upper end of the thin film elastic member 45 is integrally formed at the upper end portion of the head main body 41 and separately formed at an intermediate portion of the head main body 41. While a lower end fixing member 47 having a drum-shaped attachment surface is attached, a concave portion is formed on the upper and lower sides of the upper end fixing portion 46 and the lower end fixing member 47, and a protrusion 48a that presses the thin film elastic member 45 on the inner periphery thereof. Is formed, and the upper and lower end portions of the thin-film elastic member 45 are provided between the upper end fixing portion 46 and the cylindrical holding member 48 and between the lower end fixing member 47 and the cylindrical holding member 48. The thin film elastic member 45 can be attached in a sealed state by kneading and fastening with the fixing nut 49.
[0029]
In order to supply pressurized water as a pressurized fluid to the inside of the thin film elastic member 45, a pressurized fluid flow path 50 is formed in the central portion of the head body 41 from the lower end to the central portion of the thin film elastic member 45. A plurality of pressurized fluid channels 51 are formed in the radial direction so as to communicate with each other, and these pressurized fluid channels 51 communicate with a pressurized fluid chamber 52 formed in the cylindrical pressing member 48 and the cylindrical pressing member 48. Is communicated with the inside of the thin-film elastic member 45 through a pressurized fluid channel 53 penetrating the gas. Further, since the pressurized fluid is supplied from below, the pressurized fluid chamber 52 is formed with an air vent 54 communicating with the upper end surface of the head body 41 so that the air can be extracted before the operation is started. Thereafter, the plug 55 is plugged.
[0030]
Further, in order to mount and support the can body 1 to be formed on the forming head 40 from above, a screw 56 is formed in the intermediate portion of the head main body 41 of the forming head 40, and the can body receiving ring. 57 is screwed so that the lower end surface of the can body 1 can be supported, and the position of the can body receiving ring 57 can also be adjusted by a screw.
[0031]
Further, a pressurized fluid supply means 60 is provided to supply the molding head 40 with pressurized water as a pressurized fluid to inflate and form the thin film elastic member 45. As shown in FIG. 2, a reciprocating water pressure is provided. The pump 61 is connected to the hydraulic cylinder 62 and driven. The hydraulic cylinder 62 is supplied with hydraulic pressure from a hydraulic pressure generating unit 63. The hydraulic pressure generating unit 63 is constituted by a hydraulic pump driven by a motor, and a pressure switch 64 detects the pressure of pressurized water. The motor and the like are controlled. In the figure, reference numeral 65 denotes a hand pump for bleeding air, which is connected via a stop valve 66.
[0032]
By using such a hydraulic pressure generating unit 63, when molding a large-diameter can body 1, a compressor that drives the compressed air required when the conventional hydraulic pump is driven by an air cylinder from a motor is used. Compared to the case of obtaining the same amount of power, the power required for obtaining the same amount of pressurized water can be greatly reduced. In addition, four sets of air cylinders and a hydraulic pump are required. I was able to cope with it alone.
[0033]
The formation of the three-dimensional shape of the can body by the can body forming apparatus 20 configured as described above will be described.
First, with the molds 23 and 23a opened, the can body 1 is transported by a transport device (not shown) and mounted on the can body receiving ring 57 so as to cover the molding head 40 with the bottom facing up.
[0034]
Thereafter, by extending the rods of the air cylinders 28 and 28a, the split molds 23 and 23a attached to the outer mold holders 22 and 22a are closed. The mold clamping blocks 30 and 30a are inserted by extending the rods of the insertion / removal air cylinders 31 and 31a so that the space between the hydraulic cylinders 29 and 29a is almost eliminated.
[0035]
Next, the rods of the hydraulic cylinders 29 and 29a are extended to apply a clamping force . After the mold clamping is completed in this way, the three-dimensional shape formed in the outer molds 23 and 23a is processed into the can body 1 by supplying pressurized water from the hydraulic pump 61 to the inside of the thin film elastic member 45 of the molding head 40 to inflate it. To do.
[0036]
After the processing, the mold clamping force is released, the mold is opened, and the product is taken out in the reverse order of the above-described molding to complete the molding of the three-dimensional shape into the series of can bodies 1.
[0037]
According to such a can body forming apparatus 20, the split molds 23 and 23a are opened and closed by the air cylinders 28 and 28a, and after closing the mold, the mold clamping blocks 30 and 30a are inserted by the insertion / removal air cylinders 31 and 31a. In addition, since the clamping force is applied by the hydraulic cylinders 29 and 29a, a sufficient clamping force and pressure resistance can be obtained even when the can body 1 of the large-diameter can is formed, and the air cylinder Since the mold clamping mechanism 24 is configured by combining the hydraulic cylinder and the hydraulic cylinder, the mechanism can be made compact and compact, and the safety of work is also improved.
[0038]
Further, even when the outer molds 23 and 23a become larger as the large-diameter can is molded, the clamping force is applied by the hydraulic cylinders 29 and 29a via the clamping blocks 30 and 30a. Compared to the press mechanism, a uniform mold clamping force can be applied to the entire outer mold 23, 23a.
[0039]
Further, according to the can body forming apparatus 20, since the forming head 40 is attached to the mount 21 which is the apparatus main body and protrudes upward, the forming head 40 is enlarged as in the case of forming a large-diameter can. Even in this case, it can be stably fixed, the replacement of the molding head 40 is facilitated, and the position adjustment is also facilitated.
[0040]
Furthermore, according to the can body forming apparatus 20, since the pressurized water supplied to the forming head 40 is generated by the hydraulic pump 61 driven by the hydraulic cylinder 62, the amount of pressurized water necessary for forming a large-diameter can can be reduced. It can be secured by a set of hydraulic pumps and hydraulic cylinders, and the hydraulic pressure generating unit 63 can be miniaturized to reduce power consumption.
[0041]
【The invention's effect】
As described above in detail with reference to the embodiment, according to the can body forming apparatus according to claim 1 of the present invention, the can installed in the outer mold having a pair of split molds in which a three-dimensional shape is formed. A device for forming a can body by inserting a forming head into a body portion and inflating with a pressurized fluid, and a first fluid pressure cylinder connected to the outer mold and driven to open and close, and clamping blocks inserted and removed to intersect with each of the outer die opening and closing direction on the back of the outer mold, which is clamping the first fluid pressure cylinder, the inserted said clamping block to the back of the outer mold The second fluid pressure cylinder that applies a clamping force to the outer mold through the first fluid pressure cylinder such as an air cylinder is used to open and close the outer mold having a pair of split molds and closed. It is inserted and removed from the back of the outer mold intersect with each opening and closing direction of the outer mold By applying clamping force at a second fluid pressure cylinder such as a hydraulic cylinder via the clamping blocks can be separated and the outer mold closing and mold clamping force applying, it size needed while reducing the size of the mechanism A mold clamping force can be obtained.
[0042]
Further, according to the can body forming apparatus according to claim 2 of the present invention, since the forming head protrudes upward from the apparatus main body and is configured to cover the can body portion from above, compared with a suspension structure. Thus, it is easy to attach and remove the molding head, and even a large and heavy molding head can be easily and stably attached.
[0043]
Furthermore, according to the can body forming apparatus according to claim 3 of the present invention, the supply means of the pressurized fluid supplied to the forming head is a water pressure pump that generates water pressure as the pressurized fluid, and the water pressure pump. Since the hydraulic cylinder is configured to drive the hydraulic pump, the hydraulic fluid pump is driven by the hydraulic cylinder, so that the pressurized fluid supply means is compact compared to the air compressor required when the hydraulic pump is driven by the air cylinder. In addition, the driving power of a hydraulic motor or the like necessary for driving the hydraulic cylinder can be greatly reduced compared to the driving power of the compressor.
By these, even if it is a large diameter can, a three-dimensional shape can be easily shape | molded in a can body.
[Brief description of the drawings]
FIG. 1 is a schematic plan view according to an embodiment of a can body forming apparatus of the present invention, showing a left half in a mold open state and a right half in a mold closed state.
FIG. 2 is a schematic longitudinal sectional view of a forming head portion according to an embodiment of the can body forming apparatus of the present invention, showing a left half in an open state and a right half in a closed state.
FIG. 3 is a perspective view showing an example of a three-dimensional shape formed by the can body forming apparatus of the present invention.
FIG. 4 is a schematic plan view of a conventional can body forming apparatus, showing a left half in a mold open state and a right half in a mold closed state.
FIG. 5 is a schematic longitudinal sectional view of a conventional molding head portion.
[Explanation of symbols]
1 Can body 20 Can body forming device 21 Mount (device body)
22, 22a Outer mold holder 23, 23a Outer mold 24 Clamping mechanism 25, 25a Support base 26 Tie rod 27, 27a Opening / closing support base 28, 28a Air cylinder (first fluid pressure cylinder)
29, 29a Hydraulic cylinder (second fluid pressure cylinder)
30, 30a Clamping block 31, 31a Insertion / removal cylinder 40 Forming head 41 Head body 45 Thin film elastic member 52 Pressurized fluid chamber 54 Air vent 55 Plug 60 Pressurized fluid supply means 61 Water pressure pump 62 Hydraulic cylinder 63 Oil pressure generating unit

Claims (3)

立体形状が形成された一対の割外型を有する外型に設置した缶胴部内に成形ヘッドを挿入して加圧流体で膨らませて缶胴を成形する装置であって、
前記外型の型締機構を、前記外型に連結されて開閉駆動する第1流体圧シリンダと、
この第1流体圧シリンダで型締された外型の背面に前記外型の開閉方向のそれぞれと交差して挿脱される型締ブロックと、
前記外型の背面に挿入された前記型締ブロックを介して前記外型に型締力を付与する第2流体圧シリンダとで構成したことを特徴とする缶胴成形装置。
An apparatus for forming a can body by inserting a forming head into a can body portion installed in an outer mold having a pair of split molds in which a three-dimensional shape is formed and inflating with a pressurized fluid,
A first fluid pressure cylinder connected to the outer mold and driven to open and close the outer mold clamping mechanism;
A mold clamping block which is inserted into and removed from the back surface of the outer mold clamped by the first fluid pressure cylinder so as to intersect with each of the opening and closing directions of the outer mold;
Can body forming apparatus, characterized in that is constituted by a second fluid pressure cylinder for imparting the clamping force to the outer die through the mold clamping blocks inserted in the back of the outer die.
前記成形ヘッドを装置本体から上方に突出して設置し、前記缶胴部を上方から被せる構造としたことを特徴とする請求項1記載の缶胴成形装置。  2. The can body forming apparatus according to claim 1, wherein the forming head is provided so as to protrude upward from the apparatus main body and the can body portion is covered from above. 前記成形ヘッドに供給される加圧流体の供給手段を、前記加圧流体としての水圧を発生する水圧ポンプと、この水圧ポンプを駆動する油圧シリンダとで構成したことを特徴とする請求項1または2記載の缶胴成形装置。  2. The pressurized fluid supply means to be supplied to the molding head comprises a hydraulic pump that generates water pressure as the pressurized fluid and a hydraulic cylinder that drives the hydraulic pump. 2. The can body forming apparatus according to 2.
JP2000334531A 2000-11-01 2000-11-01 Can body forming equipment Expired - Lifetime JP4706889B2 (en)

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CN113894217A (en) * 2021-09-24 2022-01-07 泰兴市金冠包装制品有限公司 Full-automatic high-speed manufacturing method and equipment for metal packaging tin body

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