JP2004299129A

JP2004299129A - Rotary molding apparatus

Info

Publication number: JP2004299129A
Application number: JP2003092899A
Authority: JP
Inventors: Tsuyoshi Inaba; 剛志稲葉; Eiji Nemoto; 英治根本
Original assignee: Toyo Seikan Kaisha Ltd
Current assignee: Toyo Seikan Group Holdings Ltd
Priority date: 2003-03-28
Filing date: 2003-03-28
Publication date: 2004-10-28
Anticipated expiration: 2023-03-28
Also published as: JP4168806B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary molding apparatus capable of easily performing the replacement and alignment of molds for a short time and capable of efficiently performing molding from small-lot production to mass production. <P>SOLUTION: The rotary molding apparatus is constituted by arranging a plurality of molds on a base stand in an annular state and used for performing the molding of a product having a predetermined shape while annularly feeding the molds along with the rotation of the base stand. The rotary molding apparatus has the mold receiving stand 1 which is provided on the base stand 61 and to which the molds 2 are attached in a freely detachable manner, the locking parts 12 provided on the mold receiving stand 1, the parts 31 to be locked provided on the mold receiving stand 1 and locked with the locking parts 12 from the diametric direction of the rotary circumference of a circle of the base stand 61, a locating means 4 for locating the molds 2 at the predetermined positions of the mold receiving stand 1 and a fixing means for pressing the molds 21 to the mold receiving stand 1 along with the locking parts 12 and the parts 31 to be locked to fix them thereto. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、中空容器などの成形品を成形する成形装置に関し、特に、複数の金型を基台に環状に配置してなり、この金型を前記基台の回転とともに環状に送りながら、所定形状の製品の成形を行うロータリ式の成形装置に関する。
【０００２】
【従来の技術】
複数の金型を基台に環状に配置し、この金型を前記基台とともに回転させながら所定形状の製品の成形を行うロータリ式の成形装置が知られている。このようなロータリ式の成形装置は、例えば、中空容器などの製品の成形法に用いられていて、特に、ダイヘッドから押出されたパリソンを型開きした一対の割金型で受け取り、型閉めを行なってエアを吹き込み、しかるのち、型開きして製品を取り出すブロー成形に一般的に用いられている（例えば、特許文献１，特許文献２及び特許文献３参照）。
【０００３】
【特許文献１】
特開昭５２−５８６７１号公報（明細書の発明の詳細な説明の欄参照）
【特許文献２】
特開２０００−２９６８２６号公報（明細書の［００２０］の欄参照）
【特許文献３】
特開２０００−３１３０５６号公報（明細書の発明の詳細な説明の欄参照）
【０００４】
このようなロータリ式のブロー成形装置では、割金型を環状軌条に多数固定して環状に移動させながら連続的にそれぞれの割金型の開閉を行い、環状軌条を１回転する間に製品の取り出しまでを行なってブロー成形を完了するようになっている。ロータリ式のブロー成形装置は、環状に固定された多数個、例えば８〜１４個の割金型により製品を成形できるので、同一種類の製品を大量生産する場合に効率的に成形するという利点がある。
【０００５】
図５は、中空容器用のロータリ式のブロー成形装置の主要部の正面図である。
ブロー成形装置は、複数（この実施形態では８個）の金型２２０を同一の円周上に均等間隔で配置してなる成形部６と、この成形部６に所定位置（ステーション▲１▼）でパリソンを供給する材料供給部５と、成形部６から所定位置（ステーション▲７▼）で成形品を取り出す製品取り出し部８とを有している。
成形部６は、環状の基台６１に金型２２０を均等間隔で取り付けてなり、基台６１の中央に設けられた回転駆動部６５の駆動によって、金型２２０及び基台６１が、Ｚ軸（図５の紙面に垂直な方向の軸）を中心に、時計回り方向に回転する。なお、図５中の符号Ｒは、図中二点鎖線で示す基台６１の回転円周の半径を示している。
【０００６】
図６は、基台６１及び金型２２０の詳細を説明する図で、図５のＩ方向矢視拡大図である。
金型２２０は、二つの割型（図６及びこの図６の説明では、図６の紙面上方の金型を上型２２０Ａとし、紙面下方の金型を下型２２０Ｂとする）からなっている。
基台６１には、Ｚ軸と平行方向にガイドレール６２が設けられていて、このガイドレール６２の両側に、上型２２０Ａと下型２２０Ｂとが対向して配置されている。上型２２０Ａ及び下型２２０Ｂは、ガイドレール６２に案内されながら型閉め方向及び型開き方向に移動自在である。
【０００７】
基台６１の上方には、上型２２０Ａ及び下型２２０Ｂを型閉め方向及び型開き方向に移動させる駆動部７が設けられている。この駆動部７は、基台６１の上端に形成されたＹ軸方向ガイドレールに沿って進退移動自在なスライダ２７２と、このスライダ２７２のＹ軸方向の移動をＺ軸方向の移動に変換する一方のリンク機構２７３と、このリンク機構２７３のＺ軸方向の移動を、基台６１の下方の他方のリンク機構２７５に伝達するとともに、両リンク機構２７３，２７５を互いに接近する方向又は互いに離間する方向に移動させる、ねじ軸等の駆動伝達機構２７６とを有している。そして、上型２２０Ａは、フランジ２７４を介して一方のリンク機構２７３に連結され、下型２２０Ｂは、フランジ２７７を介して他方のリンク機構２７５に連結されている。
【０００８】
また、上型２２０Ａ及び下型２２０Ｂは、それぞれ、ガイドレール６２に案内されながらＺ軸方向に移動する型受け台２００Ａ及び２００Ｂに、四本〜六本のボルト２０３で固定されている。また、この型受け台２００Ａ及び型受け台２００Ｂには、上型２２０Ａ及び下型２２０Ｂに冷却水を供給するためカプラ２０４が一つ又は複数取り付けられている。
【０００９】
上記構成のブロー成形装置では、ステーション▲１▼で材料供給部２０からパリソンが供給され、ステーション▲２▼〜▲６▼まで移動する間に、上型２２０Ａ及び下型２２０Ｂの型閉めとブロー成形が行われる。ロータリ式のブロー装置においては、ステーション▲２▼〜▲４▼のいずれかで、ブロー用のノズル２２が基台６１の回転円周の径方向から金型２２０に差し込まれ、パリソンにブローエアーが吹き込まれる。このブローエアによって、パリソンがキャビティ２２１に応じた形状に膨らみ、冷却されて、ステーション▲７▼で製品取り出し装置８によって取り出される。
【００１０】
ところで、中空容器などの形状の多様化などに対応するため、多種少量生産が必要な場合がある。このような場合、ロータリ式のブロー成形装置では、上型２２０Ａ及び下型２２０Ｂからなる複数の金型２２０を基台６１から取り外して交換しなければならない。
また、中空容器などの全長が大きくなったり小さくなったりすると、これに合わせて、基台６１に対する金型２２０の固定位置を変化させて、キャビティ２２１の位置調整を行わなければならない。例えば、上型２２０Ａ及び下型２２０Ｂのキャビティ２２１によって成形される中空容器よりも、Ｘ軸方向の長さが大きい中空容器を成形する場合は、上型２２０Ａ及び下型２２０Ｂを、上型２２５Ａ（図６中仮想線で示す）及び下型２２５Ｂに交換する必要があり、かつ、キャビティ２２６の位置（回転半径Ｒ２で表される）を、キャビティ２２１の位置（同回転半径Ｒ１で表される）よりも、基台６１の回転中心から遠くに設定する必要がある。
【００１１】
しかし、上記したように、上型２２０Ａ及び下型２２０Ｂは、それぞれ、型受け台２００Ａ及び２００Ｂに四本〜六本のボルト２０３で固定されていて、しかも、ボルト２０３がＺ軸と同方向から型受け台２００Ａ及び型受け台２００Ｂに螺入されているうえ、リンク機構２７３やリンク機構２７５、フランジ２７４，２７７、カプラ２０４、ブローシリンダ（図示せず）等が邪魔になって、作業性が悪く、上型２２０Ａ及び下型２２０Ｂの交換と位置合わせに長時間を要し、中空容器などの成形コストが高くなるという問題がある。
【００１２】
【発明が解決しようとする課題】
本発明は、上記の問題点にかんがみてなされたもので、金型の交換と位置合わせを容易かつ短時間で行うことができ、少量生産から大量生産まで効率的に成形を行うことができるロータリ成形装置の提供を目的とする。
【００１３】
【課題を解決するための手段】
上記目的の達成を図るため、請求項１に記載の発明は、複数の金型を基台に環状に配置してなり、この金型を前記基台の回転とともに環状に送りながら、所定形状の製品の成形を行うロータリ式の成形装置において、前記基台に設けられ、前記金型を着脱自在に取り付ける型受け台と、この型受け台に設けられた係合部と、前記金型に設けられ、前記係合部に前記基台の回転円周の径方向から係合する被係合部と、前記金型を前記型受け台の所定位置に位置決めする位置決め手段と、前記係合部及び前記被係合部とともに前記金型を前記型受け台に押圧して固定する固定手段とを有する構成としてある。
【００１４】
この構成によれば、金型は、前記基台の回転円周の径方向から前記基台に着脱することができる。この場合、係合部及び被係合部を前記型受け台に押圧することで、前記型受け台に金型を固定することができるので、例えば、少ない本数のボルトによって金型の着脱が可能になったり、カムや楔等を用いてワンタッチで金型の着脱が可能になる。また、型受け台における金型の位置決めは、位置決め手段によって容易に行うことができる。
【００１５】
請求項２に記載の発明は、前記固定手段が、前記係合部を移動させることで、前記被係合部を介して前記金型を前記型受け台に押し付けて固定する構成としてある。
この構成によれば、前記係合部を移動させることで、この係合部に係合する被係合部とともに金型が型受け台側に移動し、型受け台に押し付けられて固定される。前記金型を前記型受け台に移動させて押し付けることができるのであれば、前記係合部を移動させる手段は、カムやボルト、楔等を用いることができ、かつ、当該固定手段を設ける位置も作業のしやすい任意に選択することができる。
【００１６】
請求項３に記載の発明は、前記被係合部又は前記係合部が、前記基台の回転円周の径方向に延びるあり溝で、前記係合部又は前記被係合部が、このあり溝と係合する突起である構成としてある。
この構成によれば、金型を前記回転円周の径方向から型受け台に近づけ、あり溝と突起とを係合させることで、金型を型受け台の所定位置に容易に位置決めして、固定することが可能である。
【００１７】
前記突起及び前記あり溝は、請求項４に記載するように、両側面にテーパ面を有する断面鳩尾状に形成してもよい。
この場合、請求項５に記載するように、前記係合部が、一方のテーパ面を有する第一の部材と、他方のテーパ面を有する第二の部材とを有し、前記第一の部材及び前記第二の部材が、前記一方及び他方のテーパ面を互いに離間する方向に移動するように設けてもよい。
このように構成することで、前記被係合部のテーパ面と当接した状態で、前記一方及び他方のテーパ面が離間方向に移動させることにより、前記金型を前記型受け台に押し付けて固定することができる。
【００１８】
請求項５に記載の発明は、請求項４に記載の場合において、前記テーパ面の一方及び他方が互いに離間する方向に移動自在に設けられ、前記テーパ面の間に挿入された楔部材と、この楔部材を前記基台の回転円周の径方向に移動自在にする移動手段とを有する構成としてある。
この構成によれば、前記移動手段によって前記楔部材が回転円周の径方向に移動すると、前記楔部材の楔作用によって前記突起のテーパ面が互いに離間する方向又は互いに接近する方向に移動する。前記テーパ面が互いに離間する方向に移動すると、このテーパ面と係合するあり溝のテーパ面に、金型を型受け台に押し付ける方向の力が作用し、金型を型受け台に押圧して固定することができる。また、テーパ面を互いに接近する方向に移動させることで、型受け台に対する金型の押圧が解除され、金型の取り外しが可能になる。
【００１９】
請求項６に記載の発明は、前記テーパ面の一方及び他方を移動させる手段が、前記第一の係合部材と第二の係合部材との間に挿入された楔状部材と、この楔状部材を前記基台の回転円周の径方向に移動させるねじ軸とを有する構成としてある。
この構成によれば、ねじ軸を回転させて楔状部材を径方向に移動させることで、第一の係合部及び第二の係合部が互いに離間する方向に移動する。これにより、係合部のテーパ面の一方及び他方が、被係合部のテーパ面と当接した状態で置換する方向に移動するので、金型を型受け台に押圧する方向の力が作用し、金型を型受け台に固定することができる。
【００２０】
請求項７に記載の発明は、前記位置決め手段が、前記基台の回転円周の径方向に予め設定された寸法を有し、前記金型と当接して前記金型の位置決めを行うように構成してある。
この構成によれば、金型を位置決め手段に当接させるだけで、簡単に金型の位置決めを行うことができる。
【００２１】
また、請求項８に記載するように、前記位置決め手段に、前記型受け部の係合部と係合する被係合部を形成してもよい。
このようにすることで、基台に対する位置決め手段の交換も容易に行える。
請求項９に記載の発明は、前記型受け台の冷却液供給部と、前記金型の冷却液流通孔の入口とを予め位置合わせして形成しておき、前記型受け台に前記金型を位置決めして固定したときに、前記型受け台の冷却液供給部と前記金型の冷却液流通孔とが連通状に連結させるようにした構成としてある。
また、請求項１０に記載の発明は、前記型受け台の冷却液供給部と、前記位置決め手段の冷却液流通孔の入口とを予め位置合わせして形成するとともに、前記位置決め手段の冷却液流通孔の出口と、前記金型の冷却液流通孔の入口とを予め位置合わせして形成し、前記型受け台に前記位置決め手段及び前記金型を位置決めして固定したときに、前記型受け台の冷却液供給部、前記位置決め手段の冷却液流通孔及び前記金型の冷却液流通孔とが連通状に連結させるようにした構成としてある。
この構成によれば、金型を型受け台に位置決めして取り付けたとき、又は、位置決め手段を型受け台に取り付け、金型を型受け台に位置決めして取り付けるだけで、型受け台から金型まで連通する冷却液流通路を得ることができる。
【００２２】
【発明の実施の形態】
以下、図面を参照しながら、本発明にかかるロータリ成形装置の好適な実施形態を説明する。
図１は本発明のロータリ成形装置の第一の実施形態にかかり、その要部の概略斜視図で、（ａ）は金型取付前の状態を、（ｂ）は金型を取り付けた状態のものを示している。また、（ｃ）は金型を型受け台に押圧して，固定する固定手段の一例を、断面で示している。
なお、以下の説明では、二分割形の金型のうち、一方の金型についてのみ説明するが、他方の金型についてもその構成及び作用は同じであるので、一方の金型について図示及び説明をし、他方の金型については説明及び図示は省略する。
【００２３】
金型２は、基台６１（図５参照）に設けられ、Ｚ軸方向に進退移動自在な型受け台１に固定される。金型２の一面側にはキャビティ２１が形成されていて、他面側には、金型２を型受け台１に取り付けるための金型取付部材３がボルト等で取り付けられている。なお、全体の図示は省略するが、金型取付部材３から金型２の内部まで、冷却水が流通する冷却水流通孔２２が形成されている。
金型２は、位置決め部材４を介在させた状態で、型受け台１に取り付けられる。位置決め部材４は、金型取付部材３と当接する当接面４ａと、型受け台１と当接する当接面４ｂとの距離ｌが予め設定されていて、位置決め部材４を型受け台１に取り付けた後に、金型取付部材３を位置決め部材４に当接させて金型２を型受け台１に取り付けることで、キャビティ２１の正確な位置が決定される。
【００２４】
型受け台１は、基台６１の回転円周の径方向と同方向、つまり、Ｙ軸方向に溝１１が形成されていて、この溝１１に、テーパ状の傾斜面を両側面に有する係合部材１２が挿入されている。溝１１の底面と、係合部材１２の底面との間にはＺ軸方向に若干の隙間が設けられていて、後述する移動手段により、係合部材１２をＺ軸方向に移動させることができるようになっている。
【００２５】
金型取付部材３の背面（金型２を取り付けた面と反対側の面）には、テーパ状の傾斜面を有する断面鳩尾状のあり溝３１が、係合部材１２と同方向に形成されている。
位置決め部材４の背面（型受け台１と対向する面）には、金型取付部材３のあり溝３１と同様のあり溝４１が、あり溝３１と同一の軸線上に形成されている。
したがって、基台６１の回転円周の径方向から金型３及び位置決め部材４を近づけ、あり溝３１，４１を係合部材１２に係合させて前記径方向に押すことで、簡単に金型２が型受け台１の所定位置に移動し、位置決めを行うことができる。
【００２６】
金型２の内部には、冷却水を流通させる冷却水流通孔２２が形成されていて、金型取付部材３の位置決め部材４と当接する面に開口している。位置決め部材４の内部には、冷却水を流通させる冷却水流通孔４２が一方の当接面４ａから他方の当接面４ｂまで貫通して形成され、位置決め部材４の当接面４ａに金型取付部材３が当接したときに、金型２の冷却水流通孔２２と位置決め部材４の冷却水流通孔４２とが連通するようになっている。さらに、位置決め部材４の冷却水流通孔４２は、位置決め部材４を型受け台１に取り付けたときに、型受け台１の基部１ａに連結された冷却水供給管５と連通するようになっている。
したがって、型受け台１に位置決め部材４と金型２とを順次取り付けて固定すると、冷却水供給管５から金型２に冷却水の供給が可能になる。
【００２７】
金型２の型受け台１への固定は、係合部材１２をＺ軸方向に移動させ、係合部材３１と係合するあり溝３１を介して、金型２及び金型取付部材３を型受け台１に押圧することで、行うことができる。
この実施形態において、係合部材３１をＺ軸方向に移動させるための手段は、図１（ａ）及び図１（ｃ）に示すように、係合部材１２に設けられ、あり溝３１と同方向に係合部材１２の内部を挿通する回転自在な軸体１４と、この軸体１４の途中部位の一カ所又は複数箇所に設けられたカム１５と、このカム１５に対応して型受け台１の溝１１の底部に突出形成された凸部１６と、この凸部１６に貫通形成され、カム１５が挿入されるとともに、軸体１４の軸心から偏心した位置に孔中心を有する偏心孔１６ａとによって行われる。
【００２８】
そして、軸体１４の頭部に形成された六角孔にレンチ等の工具を差し込んで、軸体１４を時計回り方向又は反時計回り方向に回転させることで、カム１５が偏心孔１６ａ内で回転して、係合部材１２及びこの係合部材１２と係合している金型２を型受け台１側に引き寄せ、金型２を型受け台１に押圧する。これによって、金型２が型受け台１に固定される。
なお、金型２を固定した後に、軸体１４が回転しないように、軸体１４の回転を規制するストッパを設けるとよい。また、この実施形態では、位置決め部材４にも同様の手段を講じることで、金型２が型受け台１に押圧されて固定されると同時に、位置決め部材４も型受け台１に押圧されて固定される。
【００２９】
上記構成の成形装置において金型２を型受け台１に位置決めして取り付けるには、まず、位置決め部材４のあり溝４１と型受け台１の係合部材１２とを係合させ、位置決め部材４の当接面４ｂが型受け台１の基部１ａに当接するまでＹ軸方向に移動させる。
次いで、金型取付部材３のあり溝３１と型受け台１の係合部材１２とを係合させ、金型取付部材３が位置決め部材４の当接面４ａに当接するまで、金型２をＹ軸方向に移動させる。
この後、軸体１４を時計回り方向又は反時計回り方向に回転させて金型２及び位置決め部材４を型受け台１に押し付けて固定する。
【００３０】
次に、図２及び図３を参照しながら、本発明の第二の実施形態について説明する。
図２は、本発明のロータリ成形装置の第二の実施形態にかかり、（ａ）は型受け台及び金型をＹ軸方向から見た平面図、（ｂ）は、型受け台及び金型を（ａ）のＺ軸方向から見た正面図である。
この実施形態において、型受け台１００のＹ軸方向の溝１１１に嵌入された係合部材１１２は、溝１１１内でＸ軸方向にそれぞれ移動できる一方の移動体１１２ａと他方の移動体１１２ｂとに分割されている。
【００３１】
移動体１１２ａ，１１２ｂの互いに対向する側面は、基台６１の回転中心に向かうほど先細になるテーパ面１１２ｃ，１１２ｄを形成している。移動体１１２ａ，１１２ｂの間には、テーパ面１１２ｃ，１１２ｄと同じ傾斜角度を有する楔状のキー１１５が挿入されている。溝１１１の内部側壁と移動体１１２ａ，１１２ｂとの間に、図示しないばねを複数設けて、移動体１１２ａ，１１２ｂを互いに接近する方向に常時付勢するようにするとよい。
【００３２】
Ｙ軸方向から、側壁１０１を挿通して溝１１１の内部までボルト１１４が挿入されている。このボルト１１４のねじ部は、キー１１５の一端に形成されたねじ孔１１５ａに螺入されている。ボルト１１４は、途中部位に形成されたフランジ１１４ａが、側壁１０１に形成された環状溝１０１ａに係合していて、Ｙ軸と同方向の軸線を中心に回転自在かつＹ軸方向に進退移動しないように規制されている。
【００３３】
なお、この実施形態においても、金型２を型受け台１に位置決めして固定した後に、ボルト１１４が回転しないように規制するストッパを設けるとよい。この実施形態では、ボルト１１４のフランジ１１４ａが嵌装される環状溝１１１ａの蓋部分を構成する押さえ部材１１１ｂを、ボルトで側壁１０１に取り付け、ボルトを締め付けることで、押さえ部材１１１ｂと環状溝１１１ａの底部とでフランジ１１４ａを強固に挟み込んで、ボルト１１４の回転を規制するようにしている。
【００３４】
上記構成のロータリ成形装置の作用を、図３を参照しながら説明する。
上記構成の成形装置において、金型２を型受け台１に位置決めして取り付けるには、まず、位置決め部材４のあり溝４１（図１参照）と型受け台１００の係合部材１１２とを係合させ、位置決め部材４の当接面４ｂが型受け台１の基部１ａに当接するまでＹ軸方向に移動させる。
次いで、金型取付部材３のあり溝３１と型受け台１００の係合部材１１２とを係合させ、金型取付部材３が位置決め部材４の当接面４ａに当接するまで、金型２をＹ軸方向に移動させる。
【００３５】
この後、押さえ部材１１１ｂを側壁１０１に取り付けているボルトを緩めた状態で、レンチ等の工具をボルト１１４の頭部に差し込み、ボルト１１４を反時計回り方向に回転させる。これにより、ボルト１１４のねじ部と螺合しているキー１１５が、Ｙ軸方向（図２（ｂ）において紙面の下方）に移動する。キー１１５のテーパ面と移動体１１２ａ，１１２ｂのテーパ面１１２ｃ，１１２ｄとが当接しているため、キー１１５が図２（ｂ）の紙面下方に移動すると、移動体１１２ａ，１１２ｂはＸ軸方向に、互いに離間する方向に移動する。
【００３６】
金型取付部材３のあり溝３１と、移動体１１２ａ，１１２ｂとは、テーパ面で当接して係合しているため、移動体１１２ａ，１１２ｂが図３（ａ）中矢印で示す方向に移動すると、金型２が型受け台１００側に引き寄せられて、図３（ｂ）に示すように固定される。
金型２の位置決め及び固定が完了したならば、押さえ部材１１１ｂを側壁１０１に取り付けている前記ボルトを締め付けて、ボルト１１４が回転しないようにする。
【００３７】
金型２を型受け台１から取り外すには、押さえ部材１１１ｂによるボルト１１４の規制を解除し、ボルト１１４を時計回り方向に回転させて、キー１１５を図２（ｂ）において紙面の上方に移動させる。これにより、移動体１１２ａ，１１２ｂが前記とは逆方向に移動し、型受け台１００に対する金型２の押圧が解除されて、金型２の取り外しが可能になる。移動体１１２ａ，１１２ｂを互いに接近する方向に付勢するばねを設けることで、移動体１１２ａ，１１２ｂを確実に初期位置まで復帰させることができ、次回金型２の取り付けの際に作業が容易である。
【００３８】
本発明の成形装置においては、金型２の交換の際に、型受け台１００の外側から供給される冷却水を、簡単に金型２に供給できるようにするのが好ましい。
図４は、位置決め部材４と、型受け台１００の基部１００ａに形成された冷却水流通孔１００ｂとの連結構造の一例を示すものである。この実施形態では、基台１００ａの上面に開口する冷却水流通孔１００ｂの出口に、コネクタ４５が取り付けられていて、位置決め部材４を基部１００ａに当接させたときに、位置決め部材４の冷却水流通孔２の入口にコネクタ４５が挿入されるようになっている。
【００３９】
また、特に図示はしないが、金型取付部材３の冷却水流通孔２２と位置決め部材４の冷却水流通孔４２との連結においても、上記したようなコネクタを用いることで、金型取付部材３を位置決め部材４に当接させたときに、金型取付部材３の冷却水流通孔２２の出口に、前記コネクタが挿入されるようになっている。このようにすることで、位置決め部材４及び金型２を型受け台１００に取り付けるだけで、各冷却水流通孔２２，４２，１００ｂが連通状になり、金型２に型受け台１００の外側から、冷却水を供給することができるようになる。
【００４０】
本発明の好適な実施形態について説明したが、本発明は上記の実施形態により限定されるものではない。
例えば、上記の説明では、金型側にあり溝を形成し、型受け台側に係合部材を設けるものとして説明したが、型受け台側にあり溝を形成し、金型側に係合部材を設けるように構成してもよい。
また、本発明のロータリ成形装置は、中空容器の成形を行う場合に限らず、容器以外の他の成形品を成形する場合にも適用が可能である。
【００４１】
【発明の効果】
以上、詳細に説明したように、本発明によれば、金型の交換と位置合わせを容易かつ短時間で行うことができる。また、少量生産から大量生産まで効率的に成形を行うことができ、成形コストを大幅に削減することが可能なるロータリ成形装置を得ることができる。
【図面の簡単な説明】
【図１】本発明のロータリ成形装置の第一の実施形態にかかり、その要部の概略斜視図で、（ａ）は金型取付前の状態を、（ｂ）は金型を取り付けた状態のものを示している。また、（ｃ）は金型を型受け台に押圧して，固定する固定手段の一例を、断面で示している。
【図２】本発明の第二の実施形態の成形装置における型受け台の構成を説明する図で、（ａ）は、型受け台及び金型をＹ軸方向から見た平面図、（ｂ）は、型受け台及び金型をＺ軸方向から見た正面図である。
【図３】本発明の第二の実施形態の作用を説明する図である。
【図４】位置決め部材と型受け台の基部に形成された冷却水流通孔との連結構造の一例を示す一部を断面した側面図である。
【図５】中空容器用のロータリ式ブロー成形装置の主要部の正面図である。
【図６】基台及び金型の詳細を説明する側面図で、図５のＩ方向矢視拡大図である。
【符号の説明】
１型受け台
１ａ基部
２金型
３金型取付部材
４位置決め部材
４ａ，４ｂ当接面
５冷却水供給管
１１溝
１２係合部材
１４軸体
１５カム
１６凸部
１６ａ偏心孔
３１あり溝[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a molding apparatus for molding a molded article such as a hollow container, and in particular, a plurality of dies are annularly arranged on a base, and while the molds are sent in an annular shape with the rotation of the base, a predetermined shape is provided. The present invention relates to a rotary-type molding device for molding a shaped product.
[0002]
[Prior art]
2. Description of the Related Art A rotary molding apparatus is known in which a plurality of dies are annularly arranged on a base, and a product having a predetermined shape is formed while rotating the dies together with the base. Such a rotary-type molding apparatus is used, for example, in a method of molding a product such as a hollow container. In particular, a parison extruded from a die head is received by a pair of open molds, and the mold is closed. It is generally used for blow molding in which air is blown and then the mold is opened to take out a product (for example, see Patent Documents 1, 2 and 3).
[0003]
[Patent Document 1]
JP-A-52-58671 (refer to the detailed description of the invention in the specification).
[Patent Document 2]
JP-A-2000-296826 (see column [0020] in the specification)
[Patent Document 3]
Japanese Patent Application Laid-Open No. 2000-313056 (see the detailed description of the invention in the specification)
[0004]
In such a rotary-type blow molding apparatus, a large number of split dies are fixed to an annular rail, and each split die is opened and closed continuously while moving in an annular manner. The blow molding is completed by performing the processes up to the removal. The rotary-type blow molding device can mold a product by using a large number of, for example, 8 to 14 split molds fixed in an annular shape, and thus has an advantage of efficiently molding when mass-producing the same type of product. is there.
[0005]
FIG. 5 is a front view of a main part of a rotary blow molding apparatus for a hollow container.
The blow molding apparatus includes a molding unit 6 in which a plurality of (eight in this embodiment) molds 220 are arranged at equal intervals on the same circumference, and a predetermined position (station {circle around (1)}) in the molding unit 6. And a product take-out unit 8 for taking out a molded product from the molding unit 6 at a predetermined position (station {circle around (7)}).
The molding unit 6 is formed by attaching the molds 220 to the annular base 61 at equal intervals, and the mold 220 and the base 61 are moved along the Z-axis by the driving of the rotation driving unit 65 provided at the center of the base 61. (The axis in the direction perpendicular to the plane of FIG. 5). In addition, the code | symbol R in FIG. 5 has shown the radius of the rotation circumference of the base 61 shown by the two-dot chain line in the figure.
[0006]
FIG. 6 is a diagram for explaining the details of the base 61 and the mold 220, and is an enlarged view as viewed in the direction of arrow I in FIG.
The mold 220 is composed of two split dies (in FIG. 6 and in the description of FIG. 6, the upper mold in FIG. 6 is an upper mold 220A and the lower mold in FIG. 6 is a lower mold 220B). .
A guide rail 62 is provided on the base 61 in a direction parallel to the Z-axis. On both sides of the guide rail 62, an upper die 220A and a lower die 220B are arranged to face each other. The upper mold 220A and the lower mold 220B are movable in the mold closing direction and the mold opening direction while being guided by the guide rail 62.
[0007]
Above the base 61, a drive unit 7 for moving the upper mold 220A and the lower mold 220B in the mold closing direction and the mold opening direction is provided. The drive unit 7 is provided with a slider 272 that can move forward and backward along a Y-axis direction guide rail formed at the upper end of the base 61, and converts the movement of the slider 272 in the Y-axis direction into the movement in the Z-axis direction. The link mechanism 273 and the movement of the link mechanism 273 in the Z-axis direction are transmitted to the other link mechanism 275 below the base 61, and the two link mechanisms 273 and 275 are moved toward or away from each other. And a drive transmission mechanism 276 such as a screw shaft. The upper mold 220A is connected to one link mechanism 273 via a flange 274, and the lower mold 220B is connected to the other link mechanism 275 via a flange 277.
[0008]
The upper die 220A and the lower die 220B are fixed to four die holders 200A and 200B that move in the Z-axis direction while being guided by the guide rails 62, respectively, with four to six bolts 203. In addition, one or more couplers 204 are attached to the mold receiving base 200A and the mold receiving base 200B to supply cooling water to the upper mold 220A and the lower mold 220B.
[0009]
In the blow molding apparatus having the above configuration, the parison is supplied from the material supply unit 20 at the station (1), and the upper mold 220A and the lower mold 220B are closed and blow molded while moving to the stations (2) to (6). Is performed. In the rotary blow device, the blow nozzle 22 is inserted into the mold 220 from any of the stations (2) to (4) from the radial direction of the rotation circumference of the base 61, and blow air is supplied to the parison. It is blown. With this blow air, the parison expands in a shape corresponding to the cavity 221, is cooled, and is taken out by the product take-out device 8 at the station (7).
[0010]
By the way, in order to cope with the diversification of the shape of the hollow container and the like, various kinds of small-scale production may be required. In such a case, in the rotary blow molding apparatus, the plurality of molds 220 including the upper mold 220A and the lower mold 220B must be removed from the base 61 and replaced.
Further, when the overall length of the hollow container or the like becomes larger or smaller, the fixing position of the mold 220 with respect to the base 61 must be changed to adjust the position of the cavity 221. For example, when forming a hollow container having a longer length in the X-axis direction than the hollow container formed by the cavity 221 of the upper die 220A and the lower die 220B, the upper die 220A and the lower die 220B are connected to the upper die 225A ( It is necessary to replace the lower mold 225B with the lower mold 225B, and the position of the cavity 226 (represented by the radius of rotation R2) is changed to the position of the cavity 221 (represented by the same radius of rotation R1). It is necessary to set the distance farther from the rotation center of the base 61 than that.
[0011]
However, as described above, the upper mold 220A and the lower mold 220B are fixed to the mold receiving bases 200A and 200B with four to six bolts 203, respectively, and the bolts 203 are arranged in the same direction as the Z axis. In addition to being screwed into the mold receiving base 200A and the mold receiving base 200B, the link mechanism 273, the link mechanism 275, the flanges 274, 277, the coupler 204, the blow cylinder (not shown) and the like obstruct the workability. However, there is a problem that it takes a long time to exchange and position the upper mold 220A and the lower mold 220B, and the molding cost of a hollow container or the like increases.
[0012]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and is capable of easily and quickly exchanging dies and aligning dies, and capable of efficiently performing molding from small-scale production to mass-production. The purpose is to provide a molding device.
[0013]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 comprises a plurality of dies arranged in an annular shape on a base, and while the molds are sent in an annular shape with the rotation of the base, a predetermined shape is formed. In a rotary molding apparatus for molding a product, a mold receiving base provided on the base and detachably mounting the mold, an engaging portion provided on the mold receiving base, and a mold provided on the mold are provided. An engaged portion that engages with the engaging portion in a radial direction of the rotation circumference of the base; positioning means that positions the mold at a predetermined position on the mold receiving base; A fixing means for pressing and fixing the mold to the mold receiving base together with the engaged portion is provided.
[0014]
According to this configuration, the mold can be attached to and detached from the base from a radial direction of a rotation circumference of the base. In this case, the mold can be fixed to the mold receiving base by pressing the engaging portion and the engaged portion against the mold receiving base, so that the mold can be attached and detached with a small number of bolts, for example. In addition, the mold can be attached and detached with a single touch using a cam, a wedge, or the like. Further, the positioning of the mold on the mold receiving table can be easily performed by the positioning means.
[0015]
The invention described in claim 2 is configured such that the fixing means presses and fixes the mold to the mold receiving base via the engaged portion by moving the engaging portion.
According to this configuration, by moving the engaging portion, the mold moves together with the engaged portion engaged with the engaging portion toward the mold receiving base, and is pressed against and fixed to the mold receiving base. . As long as the mold can be moved and pressed against the mold receiving base, the means for moving the engaging portion can use a cam, a bolt, a wedge, or the like, and a position where the fixing means is provided. Can also be arbitrarily selected for easy operation.
[0016]
According to a third aspect of the present invention, the engaged portion or the engaging portion is a dovetail groove extending in a radial direction of a rotation circumference of the base, and the engaging portion or the engaged portion is formed of a groove. It is configured to be a projection that engages with a dovetail groove.
According to this configuration, the mold is brought closer to the mold receiving base from the radial direction of the rotation circumference, and by engaging the dovetail groove and the projection, the mold is easily positioned at a predetermined position of the mold receiving base. , Can be fixed.
[0017]
The protrusion and the dovetail groove may be formed in a dovetail shape in cross section having tapered surfaces on both side surfaces.
In this case, as described in claim 5, the engaging portion has a first member having one tapered surface and a second member having the other tapered surface, and the first member And the second member may be provided so as to move the one and the other tapered surfaces in a direction away from each other.
With this configuration, the one and the other tapered surfaces are moved in the separating direction in a state where the tapered surfaces of the engaged portions are in contact with the tapered surfaces, so that the mold is pressed against the mold receiving base. Can be fixed.
[0018]
According to a fifth aspect of the present invention, in the case of the fourth aspect, a wedge member is provided movably provided in a direction in which one and the other of the tapered surfaces are separated from each other, and is inserted between the tapered surfaces. Moving means for making the wedge member movable in the radial direction of the rotation circumference of the base.
According to this configuration, when the wedge member moves in the radial direction of the rotation circumference by the moving means, the tapered surfaces of the protrusions move in a direction away from each other or in a direction approaching each other due to the wedge action of the wedge member. When the tapered surfaces move in a direction away from each other, a force in the direction of pressing the mold against the mold receiving base acts on the tapered surface of the dovetail groove engaging with the tapered surface, and presses the mold against the mold receiving base. Can be fixed. Further, by moving the tapered surfaces in a direction approaching each other, the pressing of the mold against the mold receiving base is released, and the mold can be removed.
[0019]
In the invention according to claim 6, the means for moving one and the other of the tapered surfaces includes a wedge-shaped member inserted between the first engagement member and the second engagement member, and the wedge-shaped member And a screw shaft for moving in the radial direction of the rotation circumference of the base.
According to this configuration, by rotating the screw shaft to move the wedge-shaped member in the radial direction, the first engagement portion and the second engagement portion move in a direction away from each other. As a result, one and the other of the tapered surfaces of the engaging portion move in a direction in which the tapered surface of the engaged portion is replaced while being in contact with the tapered surface of the engaged portion. Then, the mold can be fixed to the mold receiving base.
[0020]
The invention according to claim 7 is such that the positioning means has a dimension set in advance in a radial direction of a rotation circumference of the base and performs positioning of the mold by contacting the mold. It is composed.
According to this configuration, the positioning of the mold can be easily performed only by bringing the mold into contact with the positioning means.
[0021]
Further, as described in claim 8, the positioning means may be provided with an engaged portion which engages with an engaging portion of the mold receiving portion.
This makes it easy to replace the positioning means with respect to the base.
According to a ninth aspect of the present invention, the cooling liquid supply section of the mold receiving stand and an inlet of a cooling liquid flow hole of the mold are previously aligned and formed, and the mold receiving stand is provided with the mold. Is positioned and fixed, the cooling liquid supply section of the mold receiving base and the cooling liquid flow hole of the mold are connected to communicate with each other.
According to a tenth aspect of the present invention, the cooling liquid supply portion of the mold receiving stand and the inlet of the cooling liquid flow hole of the positioning means are formed in advance in alignment with each other, and the cooling liquid flow of the positioning means is formed. The exit of the hole and the entrance of the coolant flow hole of the mold are formed by being pre-aligned, and when the positioning means and the mold are positioned and fixed to the mold receiver, the mold receiver is The cooling liquid supply section, the cooling liquid flowing hole of the positioning means, and the cooling liquid flowing hole of the mold are connected so as to communicate with each other.
According to this configuration, when the mold is positioned and mounted on the mold receiving base, or when the positioning means is mounted on the mold receiving base and the mold is positioned and mounted on the mold receiving base, the mold is mounted on the mold receiving base. A coolant flow passage communicating with the mold can be obtained.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of a rotary forming apparatus according to the present invention will be described with reference to the drawings.
FIG. 1 is a schematic perspective view of a main part of a rotary molding apparatus according to a first embodiment of the present invention, in which (a) shows a state before a mold is attached, and (b) shows a state in which a mold is attached. Showing things. (C) shows a cross section of an example of fixing means for pressing and fixing the mold against the mold receiving base.
In the following description, among the two-part molds, only one mold will be described. However, since the other mold has the same configuration and operation, one mold is shown and described. The description and illustration of the other mold are omitted.
[0023]
The mold 2 is provided on a base 61 (see FIG. 5), and is fixed to a mold receiving base 1 that can move forward and backward in the Z-axis direction. A cavity 21 is formed on one surface of the mold 2, and a mold attachment member 3 for attaching the mold 2 to the mold receiving base 1 is attached to the other surface by bolts or the like. Although not shown, a cooling water flow hole 22 through which cooling water flows is formed from the mold mounting member 3 to the inside of the mold 2.
The mold 2 is attached to the mold receiving base 1 with the positioning member 4 interposed therebetween. The positioning member 4 has a preset distance l between a contact surface 4a that contacts the mold mounting member 3 and a contact surface 4b that contacts the mold receiving pedestal 1. After the mounting, the mold mounting member 3 is brought into contact with the positioning member 4 and the mold 2 is mounted on the mold receiving base 1, whereby the accurate position of the cavity 21 is determined.
[0024]
The mold receiving base 1 has a groove 11 formed in the same direction as the radial direction of the rotation circumference of the base 61, that is, in the Y-axis direction, and the groove 11 has tapered inclined surfaces on both sides. The joining member 12 is inserted. A slight gap is provided in the Z-axis direction between the bottom surface of the groove 11 and the bottom surface of the engagement member 12, and the engagement member 12 can be moved in the Z-axis direction by a moving unit described later. It has become.
[0025]
On the back surface of the mold mounting member 3 (the surface opposite to the surface on which the mold 2 is mounted), a dovetail-shaped groove 31 having a tapered inclined surface is formed in the same direction as the engaging member 12. ing.
A dovetail groove 41 similar to the dovetail groove 31 of the mold mounting member 3 is formed on the back surface of the positioning member 4 (the surface facing the mold receiving base 1) on the same axis as the dovetail groove 31.
Therefore, the mold 3 and the positioning member 4 are brought close to each other from the radial direction of the rotation circumference of the base 61, and the dovetail grooves 31 and 41 are engaged with the engaging member 12 and pushed in the radial direction, so that the mold can be easily formed. 2 can be moved to a predetermined position on the mold receiving table 1 and positioned.
[0026]
A cooling water flow hole 22 through which cooling water flows is formed inside the mold 2, and is opened on a surface of the mold mounting member 3 that contacts the positioning member 4. Inside the positioning member 4, a cooling water circulation hole 42 for flowing cooling water is formed penetrating from one contact surface 4 a to the other contact surface 4 b, and a mold is formed on the contact surface 4 a of the positioning member 4. When the mounting member 3 contacts, the cooling water flow hole 22 of the mold 2 and the cooling water flow hole 42 of the positioning member 4 communicate with each other. Further, when the positioning member 4 is attached to the mold receiving base 1, the cooling water circulation hole 42 of the positioning member 4 communicates with the cooling water supply pipe 5 connected to the base 1 a of the mold receiving base 1. I have.
Therefore, when the positioning member 4 and the mold 2 are sequentially attached and fixed to the mold receiving base 1, cooling water can be supplied from the cooling water supply pipe 5 to the mold 2.
[0027]
To fix the mold 2 to the mold receiving base 1, the engaging member 12 is moved in the Z-axis direction, and the mold 2 and the mold attaching member 3 are moved through the dovetail groove 31 engaging with the engaging member 31. It can be performed by pressing against the mold receiving base 1.
In this embodiment, means for moving the engaging member 31 in the Z-axis direction is provided on the engaging member 12 as shown in FIGS. A rotatable shaft 14 inserted through the inside of the engaging member 12 in the direction, a cam 15 provided at one or a plurality of positions in the middle of the shaft 14, and a mold receiving base corresponding to the cam 15. A convex portion 16 protruding from the bottom of the groove 11, an eccentric hole formed through the convex portion 16, having a cam 15 inserted therein, and having a hole center at a position eccentric from the axis of the shaft 14. 16a.
[0028]
Then, by inserting a tool such as a wrench into a hexagonal hole formed in the head of the shaft body 14 and rotating the shaft body 14 clockwise or counterclockwise, the cam 15 rotates in the eccentric hole 16a. Then, the engaging member 12 and the mold 2 engaged with the engaging member 12 are pulled toward the mold receiving base 1, and the mold 2 is pressed against the mold receiving base 1. Thereby, the mold 2 is fixed to the mold receiving base 1.
After the mold 2 is fixed, a stopper for restricting the rotation of the shaft 14 may be provided so that the shaft 14 does not rotate. Further, in this embodiment, by taking the same means for the positioning member 4, the mold 2 is pressed and fixed to the mold receiving base 1, and at the same time, the positioning member 4 is also pressed to the mold receiving base 1. Fixed.
[0029]
In order to position and attach the mold 2 to the mold receiving base 1 in the molding apparatus having the above configuration, first, the dovetail groove 41 of the positioning member 4 and the engaging member 12 of the mold receiving base 1 are engaged with each other. Is moved in the Y-axis direction until the contact surface 4b contacts the base 1a of the mold receiving base 1.
Next, the dovetail groove 31 of the mold attaching member 3 and the engaging member 12 of the mold receiving base 1 are engaged with each other, and the mold 2 is moved until the mold attaching member 3 contacts the contact surface 4 a of the positioning member 4. Move in the Y-axis direction.
After that, the shaft 14 is rotated clockwise or counterclockwise to press the mold 2 and the positioning member 4 against the mold receiving base 1 to fix them.
[0030]
Next, a second embodiment of the present invention will be described with reference to FIGS.
2A and 2B show a rotary molding apparatus according to a second embodiment of the present invention, wherein FIG. 2A is a plan view of a mold receiver and a mold as viewed from the Y-axis direction, and FIG. (A) is a front view seen from the Z-axis direction.
In this embodiment, the engaging member 112 fitted into the groove 111 in the Y-axis direction of the mold receiving base 100 is moved into one moving body 112a and the other moving body 112b that can move in the X-axis direction in the groove 111, respectively. Has been split.
[0031]
The opposing side surfaces of the moving bodies 112a and 112b form tapered surfaces 112c and 112d that taper toward the rotation center of the base 61. A wedge-shaped key 115 having the same inclination angle as the tapered surfaces 112c and 112d is inserted between the moving bodies 112a and 112b. A plurality of springs (not shown) may be provided between the inner side wall of the groove 111 and the moving bodies 112a and 112b so as to constantly urge the moving bodies 112a and 112b in directions approaching each other.
[0032]
A bolt 114 is inserted from the Y-axis direction into the groove 111 through the side wall 101. The screw portion of the bolt 114 is screwed into a screw hole 115 a formed at one end of the key 115. The bolt 114 is rotatable about an axis in the same direction as the Y axis and does not move in the Y axis direction because the flange 114a formed in the middle part is engaged with the annular groove 101a formed in the side wall 101. Is regulated as follows.
[0033]
Also in this embodiment, it is preferable to provide a stopper for restricting the bolt 114 from rotating after positioning and fixing the mold 2 to the mold receiving base 1. In this embodiment, the holding member 111b constituting the lid of the annular groove 111a in which the flange 114a of the bolt 114 is fitted is attached to the side wall 101 with a bolt, and the bolt is tightened. The flange 114a is firmly sandwiched between the bottom and the bottom to restrict the rotation of the bolt 114.
[0034]
The operation of the rotary forming apparatus having the above configuration will be described with reference to FIG.
In the molding apparatus having the above-described configuration, in order to position and attach the mold 2 to the mold receiving base 1, first, the dovetail groove 41 (see FIG. 1) of the positioning member 4 and the engaging member 112 of the mold receiving base 100 are engaged. The positioning member 4 is moved in the Y-axis direction until the contact surface 4b of the positioning member 4 contacts the base 1a of the mold receiving base 1.
Next, the dovetail groove 31 of the mold attaching member 3 is engaged with the engaging member 112 of the mold receiving base 100, and the mold 2 is moved until the mold attaching member 3 contacts the contact surface 4a of the positioning member 4. Move in the Y-axis direction.
[0035]
Thereafter, a tool such as a wrench is inserted into the head of the bolt 114 with the bolt attaching the holding member 111b to the side wall 101 loosened, and the bolt 114 is rotated counterclockwise. As a result, the key 115 screwed with the threaded portion of the bolt 114 moves in the Y-axis direction (below the paper in FIG. 2B). Since the tapered surface of the key 115 and the tapered surfaces 112c and 112d of the moving bodies 112a and 112b are in contact with each other, when the key 115 moves downward in FIG. 2B, the moving bodies 112a and 112b move in the X-axis direction. Move in a direction away from each other.
[0036]
Since the dovetail groove 31 of the mold mounting member 3 and the moving bodies 112a and 112b are in contact with and engaged with each other with a tapered surface, the moving bodies 112a and 112b move in the directions indicated by arrows in FIG. Then, the mold 2 is pulled toward the mold receiving base 100 and is fixed as shown in FIG.
When the positioning and the fixing of the mold 2 are completed, the bolt attaching the holding member 111b to the side wall 101 is tightened to prevent the bolt 114 from rotating.
[0037]
In order to remove the mold 2 from the mold receiving base 1, the regulation of the bolt 114 by the pressing member 111b is released, the bolt 114 is rotated clockwise, and the key 115 is moved upward in FIG. 2B. Let it. Thereby, the moving bodies 112a and 112b move in the opposite direction to the above, the pressing of the mold 2 against the mold receiving base 100 is released, and the mold 2 can be removed. By providing a spring for urging the moving bodies 112a and 112b in a direction approaching each other, the moving bodies 112a and 112b can be reliably returned to the initial position, and the work is easy when the mold 2 is mounted next time. is there.
[0038]
In the molding apparatus of the present invention, it is preferable that the cooling water supplied from the outside of the mold receiving base 100 can be easily supplied to the mold 2 when the mold 2 is replaced.
FIG. 4 shows an example of a connection structure between the positioning member 4 and a cooling water flow hole 100b formed in the base 100a of the mold receiving base 100. In this embodiment, the connector 45 is attached to the outlet of the cooling water flow hole 100b opened on the upper surface of the base 100a, and when the positioning member 4 is brought into contact with the base 100a, the cooling water of the positioning member 4 The connector 45 is inserted into the inlet of the communication hole 2.
[0039]
Although not particularly shown, the connection between the cooling water flow hole 22 of the mold mounting member 3 and the cooling water flow hole 42 of the positioning member 4 is also performed by using the connector as described above. Is brought into contact with the positioning member 4, the connector is inserted into the outlet of the cooling water flow hole 22 of the mold mounting member 3. In this manner, the cooling water circulation holes 22, 42, and 100b communicate with each other just by attaching the positioning member 4 and the mold 2 to the mold receiving base 100. Thus, the cooling water can be supplied.
[0040]
Although the preferred embodiment of the present invention has been described, the present invention is not limited to the above embodiment.
For example, in the above description, it was described that the groove was formed on the mold side and the engaging member was provided on the mold cradle side, but the groove was formed on the mold cradle side and engaged with the mold side. You may comprise so that a member may be provided.
Further, the rotary forming apparatus of the present invention is not limited to the case where a hollow container is formed, but is also applicable to a case where a molded product other than the container is formed.
[0041]
【The invention's effect】
As described above in detail, according to the present invention, mold exchange and alignment can be performed easily and in a short time. Further, it is possible to obtain a rotary molding apparatus that can efficiently perform molding from small-scale production to mass production, and can greatly reduce molding cost.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of a main part of a rotary molding apparatus according to a first embodiment of the present invention, in which (a) shows a state before a mold is attached, and (b) shows a state in which a mold is attached. Is shown. (C) shows a cross section of an example of fixing means for pressing and fixing the mold against the mold receiving base.
FIGS. 2A and 2B are diagrams illustrating a configuration of a mold receiving stand in a molding apparatus according to a second embodiment of the present invention. FIG. 2A is a plan view of the mold receiving stand and a mold viewed from a Y-axis direction. () Is a front view of the mold receiver and the mold as viewed from the Z-axis direction.
FIG. 3 is a diagram illustrating the operation of the second embodiment of the present invention.
FIG. 4 is a partially sectional side view showing an example of a connection structure between a positioning member and a cooling water flow hole formed in a base of a mold receiving base.
FIG. 5 is a front view of a main part of a rotary blow molding apparatus for a hollow container.
6 is a side view for explaining details of a base and a mold, and is an enlarged view as viewed in the direction of arrow I in FIG. 5;
[Explanation of symbols]
Type 1 cradle
1a Base
2 Mold
3 Mold mounting member
4 Positioning member
4a, 4b contact surface
5 Cooling water supply pipe
11 grooves
12 Engaging member
14 Shaft
15 cams
16 convex
16a Eccentric hole
31 dovetail groove

Claims

A plurality of molds are annularly arranged on a base, and while the molds are annularly fed with the rotation of the base, in a rotary molding apparatus for molding a product of a predetermined shape,
A mold receiving base provided on the base, to which the mold is removably attached;
An engaging portion provided on the mold receiving base;
An engaged portion provided on the mold and engaged with the engaging portion from a radial direction of a rotation circumference of the base;
Positioning means for positioning the mold at a predetermined position of the mold receiving table,
Fixing means for pressing and fixing the mold together with the engagement portion and the engaged portion to the mold receiving base,
A rotary forming apparatus comprising:

2. The rotary molding apparatus according to claim 1, wherein the fixing unit presses and fixes the mold to the mold receiving base via the engaged portion by moving the engagement portion. 3. .

The engaged portion or the engaging portion is a dovetail groove extending in a radial direction of a rotation circumference of the base, and the engaging portion or the engaged portion is a protrusion engaging with the dovetail groove. The rotary forming apparatus according to claim 1 or 2, wherein:

The rotary forming apparatus according to claim 3, wherein the protrusion and the dovetail groove are formed in a dovetail shape having a tapered surface on both side surfaces.

The engaging portion has a first member having one tapered surface, and a second member having the other tapered surface, and the first member and the second member are the one and the other. By moving the one and the other tapered surfaces in the separating direction in a state in which the tapered surfaces are moved in a direction in which the tapered surfaces are separated from each other and in contact with the tapered surface of the engaged portion, the mold is formed. The rotary forming apparatus according to claim 4, wherein the rotary molding device is pressed against the mold receiving base to be fixed.

Means for moving one and the other of the tapered surfaces include a wedge-shaped member inserted between the first engagement member and the second engagement member, and the wedge-shaped member is formed around a rotation circumference of the base. The rotary forming apparatus according to claim 5, further comprising a screw shaft that moves in a radial direction.

7. The positioning device according to claim 1, wherein the positioning unit has a predetermined dimension in a radial direction of a rotation circumference of the base, and performs positioning of the mold by contacting the mold. 8. The rotary forming apparatus according to any one of the above.

The rotary forming apparatus according to any one of claims 1 to 7, wherein an engaged portion that engages with an engaging portion of the mold receiving portion is formed in the positioning means.

When the cooling liquid supply part of the mold receiving stand and the inlet of the cooling liquid flow hole of the mold are previously aligned and formed, and the mold is positioned and fixed to the mold receiving stand, The rotary molding apparatus according to any one of claims 1 to 8, wherein a cooling liquid supply part of the mold receiving stand and a cooling liquid flow hole of the mold are connected in a communicating manner.

The cooling liquid supply part of the mold receiving stand and the inlet of the cooling liquid flow hole of the positioning means are formed in advance by being aligned, and the outlet of the cooling liquid flow hole of the positioning means, and the cooling liquid of the die are formed. When the positioning means and the mold are positioned and fixed to the mold receiving pedestal, the cooling liquid supply portion of the mold receiving pedestal and the cooling of the positioning means are formed. The rotary molding device according to any one of claims 1 to 8, wherein the liquid flow hole and the cooling liquid flow hole of the mold are connected in a communicating manner.