JP2004243326A

JP2004243326A - Rotary compression molding machine

Info

Publication number: JP2004243326A
Application number: JP2003032795A
Authority: JP
Inventors: Yasuharu Imamura; 康晴今村; Shoichi Kimura; 祥一木村; Akinori Amamoto; 明典天本; Nobuo Tamura; 信雄田村; Tsuneo Sawada; 恒雄澤田
Original assignee: HATA IRON WORKS; Nitto Denko Corp; Hata Tekkosho Co Ltd
Current assignee: HATA IRON WORKS; Nitto Denko Corp; Hata Tekkosho Co Ltd
Priority date: 2003-02-10
Filing date: 2003-02-10
Publication date: 2004-09-02
Anticipated expiration: 2023-02-10
Also published as: KR20040072475A; KR100595397B1; JP4040990B2; MY138970A; TW200415006A; CN1253302C; TWI233392B; CN1530217A

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rotary compression molding machine which can efficiently manufacture a small quantity and multiple kinds of compression molded products. <P>SOLUTION: The rotary compression molding machine is provided with an operation mechanism 80, which selectively operates each of a plurality of lower pestles 30 from a fixing state to fix it at the top dead center regardless of the orbital motion of the lower pestle to an operating state capable of vertical movement corresponding to the orbital motion of the lower pestle and vice versa. The operation mechanism, for example, is made as an operation member 81 provided corresponding to each of a plurality of the lower pestles. The operation member can take a fixing position to fix the lower pestle at the top dead center by being engaged with the corresponding lower pestle and an operating position to release the engagement with the lower pestle. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、粉末等の被成形材料を圧縮成形するための回転圧縮成形機に関する。
【０００２】
【従来の技術】
垂直回転軸周りに水平回転駆動される回転体であって、周方向に沿った複数の臼部を有する回転体と、前記臼部の上方開口及び下方開口からそれぞれ上下動可能に挿入された上杵及び下杵とを備え、該上杵及び下杵によって前記臼部内に充填された粉末等の被成形材料を圧縮成形する回転圧縮成形機は、半導体封止用エポキシ樹脂の成形等の種々の分野に使用されている。
【０００３】
ところで、従来の回転圧縮成形機は、圧縮成型品の外径を変更する場合には、現在装着されている臼部，上杵及び下杵を交換しなければならず、少量多形状の製造には不適であるという問題があった。
【０００４】
即ち、前記回転圧縮成形機においては、前記臼部の内径と該臼部に挿入される上杵及び下杵の直径とによって、圧縮成型品の外径が画される。
従って、直径Ｘ１ｍｍの圧縮成型品を製造している状態から直径Ｘ２ｍｍの圧縮成型品を製造する状態に仕様変更する場合には、Ｘ１ｍｍに対応した一の臼部，一の上杵及び一の下杵をＸ２ｍｍに対応した他の臼部，他の上杵及び他の下杵に交換する必要があるが、斯かる交換は、通常、前記下杵と係合し該下杵の上下動を案内する案内機構の一部を取り外さなければならず、非常に面倒な作業となる。
【０００５】
このように、従来の回転圧縮成形機は、斯かる仕様変更に対して十分な配慮がなされておらず、その結果、少量多形状の製造に不向きであった。
【０００６】
【発明が解決しようとする課題】
本発明は、斯かる従来技術に鑑みなされたものであり、一の形状の圧縮成型品を製造する状態から他の形状の圧縮成型品を製造する状態への仕様変更を容易に行うことができる回転圧縮成形機の提供を、一つの目的とする。
【０００７】
【課題を解決するための手段】
本発明は、前記目的を達成するために、垂直回転軸周りに水平回転される回転体であって、周方向に沿って複数の臼部が設置可能とされた回転体と、前記複数の臼部に対してそれぞれ上方から上下動可能に挿入される複数の上杵であって、前記回転体の水平回転と同期して前記垂直回転軸周りに公転する複数の上杵と、前記複数の臼部に対してそれぞれ下方から上下動可能に挿入される複数の下杵であって、前記回転体の水平回転に連動して前記垂直回転軸周りに公転する複数の下杵と、前記複数の上杵を、それぞれ、該上杵の下端部が前記臼部の上方に位置する上死点から該上杵の下端部が前記臼部内に位置する下死点へ押動する上杵加圧機構と、前記回転体の下方に配設された案内機構であって、前記下杵の公転に応じて、該下杵を、上端部が前記臼部の上端開口と略同一となる上死点と、上端部が前記臼部内における所定の下方位置に位置する下死点との間で上下動させる案内機構と、前記回転体を挟んで前記上杵加圧機構と対向するように配設され、前記下杵を上方へ押動する下杵加圧機構と、前記複数の下杵のそれぞれを、該下杵の公転運動に拘わらず上死点に固定する固定状態と、該下杵の公転運動に応じて前記上下動が可能な作動状態とに選択操作する操作機構とを備えている回転圧縮成形機を提供する。
【０００８】
好ましくは、前記操作機構は、前記複数の下杵のそれぞれに対応して設けられた複数の操作部材であって、対応する前記下杵と係合して該下杵を上死点に固定する固定位置と、対応する前記下杵との係合を解除して該下杵を上下動可能とする作動位置とをとり得る操作部材を有する。
より好ましくは、前記下杵は、前記操作部材が固定位置に位置する際に、該操作部材の少なくとも一部が係入される保持凹部を有する。
【０００９】
例えば、前記案内機構は、前記下杵の公転方向に沿って、該下杵を上死点に位置させる最上部と、前記下杵を最上部から下方へ案内する下降部と、前記下杵を所定の分量位置に保持する分量部と、該分量部から前記下杵加圧体を挟んで配置された渡し部と、前記下杵を渡し部から前記最上部へ移行させる押上部とを有する案内面を備え得る。
斯かる態様において、好ましくは、前記回転圧縮成形機は、前記下杵を前記最上部から前記下降部へ強制的に移行させるカム機構を有し得る。
前記カム機構は、前記最上部から前記下降部への移行領域に配設された押し下げカムと、前記操作部材に設けられた当接部材であって、該操作部材が作動位置に位置する際には前記押し下げカムと係合せず、且つ、該操作部材が固定位置に位置する際には前記押し下げカムと係合する当接部材とを有する。
【００１０】
前記カム機構を備える態様において、好ましくは、前記下杵は、前記臼部内に挿入される杵部と、前記臼部の下方に位置する頭部と、該頭部から径方向外方に膨出された膨出部とを有し得る。
そして、前記押し下げカムは、前記下杵の公転に応じて前記当接部材と係合する傾斜面と、前記当接部材による該傾斜面への作用に応じて前記膨出部を下方へ押圧する押圧部とを有し得る。
【００１１】
前記押し下げカムは、一態様においては、前記当接部材と前記膨出部との間において前記回転体の径方向に沿って延びる枢支軸周り揺動自在とされる。
斯かる態様において、該押し下げカムは、前記傾斜面が前記当接部材の公転軌道上に位置し且つ前記押圧部が前記膨出部と非係合となる初期姿勢と、前記当接部材によって押圧されることにより前記傾斜面が該当接部材の移動経路と交差しないように前記枢支軸周りに揺動し、これにより、前記押圧部が前記膨出部を押圧する押圧姿勢とをとり得るように構成される。
【００１２】
他態様において、前記押し下げカムは、上下動移動自在とされ、前記傾斜面が前記当接部材の公転軌道上に位置し且つ前記押圧部が前記膨出部と非係合となる初期姿勢と、前記当接部材によって押圧されることにより前記傾斜面が該当接部材の移動経路と交差しないように下方へ移動し、これにより、前記押圧部が前記膨出部を押圧する押圧姿勢とをとり得るように構成される。
【００１３】
なお、前記カム機構は、さらに、前記押し下げカムを前記初期姿勢に向けて付勢する付勢部材を備える。
【００１４】
好ましくは、前記案内機構は、前記案内面の下降部との共働下に前記下杵の膨出部を狭持する案内部材を有し得る。
該案内部材は、最上端位置が前記案内面の最上端位置と略同一又は該案内面の最上端位置よりも下方に位置するように構成される。
【００１５】
【発明の実施の形態】
以下、本発明に係る回転圧縮成形機の好ましい実施の形態について、添付図面を参照しつつ説明する。
図１に、本実施の形態に係る回転圧縮成形機１の展開縦断面図を示す。
【００１６】
前記回転圧縮成形機１は、図１に示すように、垂直回転軸（図示せず）周りに水平に駆動回転される回転体１０と、前記回転体１０の上方に上下動可能に配設された複数の上杵２０と、前記回転体１０の下方に上下動可能に配設された複数の下杵３０と、前記複数の上杵２０をそれぞれ下方へ押動する上杵加圧機構４０と、前記複数の下杵３０をそれぞれ案内する案内機構５０と、前記複数の下杵をそれぞれ上方へ押動する下杵加圧機構６０とを備えている。
なお、図１中の矢印は回転体１０の回転方向を示している。
【００１７】
斯かる回転圧縮成形機１は、前記回転体１０に周方向に沿って設置される臼部１１内に充填した粉末等の被成形材料を前記上杵２０及び下杵３０により狭圧して圧縮成型品を製造する為に使用される。
なお、該回転圧縮成形機１は、半導体封止用エポキシ樹脂成形品や薬剤、入浴剤、ボタン電池、菓子類等の種々の圧縮成形品の製造に使用できる。
【００１８】
前記回転体１０は、前述の通り、周方向に沿って複数の臼部１１が設置可能とされている。
詳しくは、前記回転体１０は、周方向に沿った複数の貫通孔１２を有している。該貫通孔１２は該回転体１０の上方及び下方に開口しており、所望内径の臼部１１を着脱可能に設置し得るようになっている。
【００１９】
本実施の形態においては、図１に示すように、前記回転体１０には、周方向に沿って交互に、第１内径（Ｘ１ｍｍ）の第１臼部１１ａと、第２内径（Ｘ２ｍｍ）の第２臼部１１ｂとが設置されている。
【００２０】
前記複数の上杵２０は、それぞれ、対応する臼部１１の内径と略同一外径を有し、該臼部１１内に上方から上下動可能に嵌入される杵部２１と、該杵部２１から上方に延び、対応する臼部１１の内径より大径とされた頭部２２とを有している。
【００２１】
斯かる上杵２０は、前記回転体１０の水平回転と同期して前記垂直回転軸周りに公転するように配設されており、且つ、前記杵部２１の下端部が対応する臼部内の所定位置に位置する下死点と、前記杵部２１の下端部が対応する臼部の上方に待避する上死点との間で上下動可能とされている。
【００２２】
本実施の形態においては、前記複数の上杵２０は、前記第１臼部１１ａに対応する第１上杵２０ａと、前記第２臼部１１ｂに対応する第２上杵２０ｂとを含んでいる。
前記第１及び第２上杵２０ａ，２０ｂは、それぞれ、杵部の外径がＸ１ｍｍ及びＸ２ｍｍより若干（例えば、０．１ｍｍ）小径とされている。
【００２３】
前記上杵加圧機構４０は、公転する上杵２０が前記垂直回転軸周りの周方向所定位置に位置する際に、該上杵２０を上死点から下死点へ押圧するように構成されている。
該上杵加圧機構４０は、前記下杵加圧機構６０との共働下に、被成形材料を圧縮成形する際の狭圧力を提供する。
【００２４】
前記複数の下杵３０は、それぞれ、対応する臼部１１の内径より若干（例えば、０．１ｍｍ）小径とされ、該臼部１１内に下方から上下動可能に嵌入される杵部３１と、該杵部３１から下方に延び、対応する臼部１１の内径より大径とされた頭部３２とを有している。
【００２５】
本実施の形態においては、前記複数の下杵３０は、前記第１臼部１１ａに対応する第１下杵３０ａと、前記第２臼部１１ｂに対応する第２下杵３０ｂとを含んでいる。
【００２６】
このように、第１臼部１１ａには、該第１臼部１１ａに対応した第１上杵２０ａ及び第１下杵３０ａが挿入され、且つ、第２臼部１１ｂには、該第２臼部１１ｂに対応した第２上杵２０ｂ及び第２下杵３０ｂが挿入されるようになっている。
【００２７】
前記下杵加圧機構６０は、前記回転体１０を挟んで、前記上杵加圧機構４０と対向するように配設されている。
即ち、前記上杵加圧機構４０及び前記下杵加圧機構６０は、前記垂直回転軸を基準にして、周方向同一位置に配設されている。
従って、一の上杵２０及び該一の上杵２０に対応する一の下杵３０が、前記上杵加圧機構４０及び前記下杵加圧機構６０と周方向同一位置まで公転されると、該一の上杵２０及び該一の下杵３０によって被成形材料１１０が圧縮され、これにより、圧縮成形品１００が製造される。
【００２８】
前記案内機構５０は、前記回転体１０の下方において前記複数の下杵３０と係合するようになっている。
詳しくは、該案内機構５０は、前記回転体１０の水平回転に連動して前記複数の下杵３０が前記垂直回転軸周りに公転するのに応じ、該複数の下杵３０のそれぞれを上下動させるように構成されている。
【００２９】
より詳しくは、前記案内機構５０は、前記複数の下杵３０のそれぞれを、公転位置に応じて、上端部が前記臼部１１の上端開口と略同一となる上死点と、上端部が前記臼部１１内における所定の下方位置に位置する下死点との間で上下動させるように構成されている。
【００３０】
具体的には、前記案内機構５０は、前記下杵３０における頭部３２の下端部と当接する案内面５１を有している。
該案内面５１は、前記下杵３０の公転方向に沿って、該下杵３０を上死点に位置させる最上部５１ａと、前記下杵３０を最上部５１ａから下方へ案内する下降部５１ｂと、前記下杵３０を所定の分量位置に保持する分量部５１ｃと、前記分量部５１ｃから前記下杵加圧体６０を挟んで配置された渡し部５１ｄと、前記下杵３０を渡し部５１ｄから前記最上部５１へ移行させる押上部５１ｅとを有している。
【００３１】
好ましくは、前記下杵３０は、前記頭部３２から径方向外方へ膨出した膨出部３３を備えることができる。
斯かる好ましい形態においては、前記案内機構５０は、前記案内面５１の下降部５１ｂとの共働下に、前記下杵３０の膨出部３３を狭持する案内部材５２を備えることができる。
なお、該案内部材５２は、最上端位置が前記案内面５１の最上端位置（最上部５１ａ）と略同一又は該案内面の最上端位置よりも下方に位置するものとされる。
【００３２】
ここで、斯かる構成の回転圧縮成形機１の概略動作説明を行う。
図２は、前記回転体１０の水平回転に応じた一の上杵（第２上杵２０ｂ）及び一の下杵（第２下杵３０ｂ）の状態変化を時系列で示す縦断面図である。
【００３３】
前記下杵３０ｂが前記最上部に位置する際には、該下杵３０ｂは上死点に保持されている。
この状態から、前記回転体１０の回転に連動して前記下杵３０ｂが公転すると、該下杵３０ｂは前記最上部５１ａから前記下降部５１ｂへ移動する。
図２に示すように、前記回転圧縮成形機１は、前記下降部５１ｂ及び前記分量部５１ｃに対応した位置に、材料供給部７０を備えている。
斯かる構成により、前記下杵３０ｂが最上部５１ａから下降部５１ｂを介して分量部５１ｃへ移動する際に、対応する臼部１１ｂ内に被成形材料１１０が充填されるようになっている。
【００３４】
さらに、前記回転体１０が回転すると、前記下杵３０ｂは前記下杵加圧機構６０によって上方へ押動される。この際、対応する上杵２０ｂも前記上杵加圧機構４０によって下方へ押動される。従って、対応する臼部１１ｂ内に充填された被成形材料１１０は、上杵２０ｂ及び下杵３０ｂによって狭圧され、該臼部１１ｂの内径に応じた外径の圧縮成形品１００とされる。
なお、斯かる圧縮成形品１００の高さ寸法は、前記上杵２０ｂ及び下杵３０ｂの押動ストロークによって、調整され得る。
【００３５】
この状態から、さらに、回転体１０が回転されると、前記下杵３０ｂは、前記渡し部５１ｄへ移動される。
他方、前記上杵２０ｂは、前記上杵加圧機構４０によって押動された後には、再び、上死点へ戻される。
【００３６】
その後、前記回転体１０の回転に応じて、前記下杵３０ｂは、前記押上部５１ｅを介して、再び、前記最上部５１ａへ移動する。
斯かる下杵３０ｂの上方への移動によって、圧縮成形品１００は回転体１０の上面に押し出される。
【００３７】
このように、本実施の形態に係る回転圧縮成形機１は、前記回転体１０を垂直回転軸周りに水平回転させることで、圧縮成形品１００を製造し得るように構成されているが、該回転圧縮成形機１は、さらに、前記複数の下杵３０のうちの所望の下杵（本実施の形態においては第２下杵３０ｂ）のみを作動状態とする選択機構８０を備えており、これにより、一台の回転圧縮成形機によって少量多形状の圧縮成形品を効率的に製造し得るようになっている。
【００３８】
図３に、前記操作機構８０の縦断模式図を示す。
図３に示すように、前記操作機構８０は、前記複数の下杵３０のそれぞれに対応して設けられた複数の操作部材８１を有している。
【００３９】
前記操作部材８１は、外部操作に基づき、対応する下杵３０と係合して該下杵３０を上死点に固定する固定位置（図３（ａ））と、対応する下杵３０との前記係合を解除して該下杵３０を上下動可能な状態とする作動位置（図３（ｂ））とをとり得るように構成されている。
【００４０】
本実施の形態においては、前記操作部材８１は、前記回転体１０に径方向移動自在に設けられている。
即ち、本実施の形態においては、前記操作部材８１は、前記垂直回転軸を基準にして、前記回転体１０の径方向外方に位置する際に前記固定位置をとり、且つ、前記回転体１０の径方向内方に位置する際に前記作動位置をとり得るようになっている。
【００４１】
好ましくは、前記複数の下杵３０には、それぞれ、対応する前記操作部材８１が固定位置に位置する際に、該操作部材８１の一部（図示においては、係合ピン８２）が係入される保持凹部３５を設けることができる。
斯かる構成を備えることにより、前記操作部材８１を固定位置に位置させた際に、下杵３０を確実に上死点に保持できる。
【００４２】
本実施の形態に係る回転圧縮成形機１は、前記操作機構８０を備えることにより、少量多形状の製造に効率的に対応することができる。
前述の通り、該回転圧縮成形機１は、外径Ｘ１ｍｍの圧縮成形品を製造する為の第１臼部１１ａ，第１上杵２０ａ及び第１下杵３０ａと、外径Ｘ２ｍｍの圧縮成形品を製造する為の第２臼部１１ｂ，第２上杵２０ｂ及び第２下杵３０ｂとを有している。
【００４３】
斯かる回転圧縮成形機１において、例えば、第１下杵３０ａに対応した操作部材８１を固定位置（図３（ａ））に位置させ、且つ、第２下杵３０ｂに対応した操作部材８１を作動位置（図３（ｂ））に位置させると共に、第１上杵２０ａを取り外すことで（図１参照）、外径Ｘ２ｍｍの圧縮成形品を製造することができる。
【００４４】
即ち、斯かる設定により、第１下杵３０ａは自身の公転位置に拘わらず上死点に保持され、該第１下杵３０ａの杵部３１の上端部が対応する臼部１１ａの上端開口と略同一位置に保持される。従って、第１下杵３０ａが挿入される臼部１１ａに、前記材料供給部７０から被成形材料１１０が供給されることは無く、これにより、キャップ等の追加部材を備えることなく、材料の無駄を防止できる（図１参照）。
なお、上杵２０の取り外しは、下杵３０の取り外しに比して、容易に行うことができる。従って、不要な上杵（該例示においては、第１上杵２０ａ）の取り外しは、比較的短時間で行うことができる。
【００４５】
さらに、外径Ｘ２ｍｍの圧縮成形品１００を製造している状態から、外径Ｘ１ｍｍの圧縮成形品を製造するように仕様変更する場合には、第１下杵３０ａに対応した操作部材８１を作動位置に位置させ、且つ、第２下杵３０ｂに対応した操作部材８１を固定位置に位置させると共に、第１上杵２０ａを取り付け、且つ、第２上杵２０ｂを取り外すだけで、容易に対処できる。
【００４６】
このように、複数の形状の圧縮成形品を製造し得るように臼部１１，上杵２０及び下杵３０が設定されている回転圧縮成形機において、前記操作機構８０を備えることにより、少量多形状の圧縮製品の製造に極めて効率的に対処できる。
【００４７】
なお、本実施の形態においては、２種類の外径の圧縮成形品を製造し得る場合を例に説明したが、当然ながら、本発明は、３種類以上の外径の圧縮成形品を製造する場合にも適用可能である。
又、本発明は、外径のみならず、２種類以上の外形状の圧縮成形品を製造する場合にも適用できる。斯かる場合には、前記臼部，上杵及び下杵は、一の外形状の圧縮成形品を製造する為の一の組合せと、他の外形状の圧縮成形品を製造する為の他の組合せとを含むものとされる。
【００４８】
より好ましくは、前記回転圧縮成形機１は、作動状態にある下杵３０のみを前記案内面５１の最上部５１ａから下降部５１ｂへ強制的に移行させるカム機構９０を備えることができ、これにより、下杵３０の上下動の制御性を向上させることができる。
【００４９】
例えば、前記下杵３０が最上部５１ａから下降部５１ｂへ移行する際に、該下杵３０の公転速度（前記回転体１０の回転速度）が十分に低速の場合には、該下杵３０は自重によって最上部５１ａから下降部５１ｂへ滑らかに移行する。
これに対し、前記下杵３０の公転速度が高速となると、該下杵３０に作用する遠心力によって該下杵３０の最上部５１ａから下降部５１ｂへの移行が妨げられることになる。
【００５０】
前記カム機構９０は、斯かる不都合を防止する為に備えられるものである。
図４に、前記カム機構の動作説明を行う為の展開断面図を示す。
なお、図４において、固定状態とされている下杵３０ａに対応し、取り外された上杵２０ａを二点鎖線で示している。
【００５１】
図４に示すように、該カム機構９０は、前記最上部５１ａから前記下降部５１ｂへの移行領域に配設された押し下げカム９１と、前記回転体１０の回転に連動した下杵３０の公転に応じて、該下杵３０のうち作動状態の下杵３０ｂと係合する当接部材９５とを備えている。
【００５２】
本実施の形態においては、前記当接部材９５は、前記操作部材８１に設けられている。
詳しくは、前記当接部材９５は、前記操作部材８１が固定位置に位置する際には前記押し下げカム９１と係合せず、且つ、前記操作部材８１が作動位置に位置する際には前記押し下げカム９１と係合するように、配置されている（図３参照）。
【００５３】
即ち、前記操作部材８１を固定位置に位置させると、該操作部材８１に設けられた当接部材９５は押し下げカム９１からオフセットされ、且つ、前記操作部材８１を作動位置に位置させると、該操作部材８１に設けられた当接部材９５は押し下げカム９１と係合可能な位置に位置するようになっている。
【００５４】
前記押し下げカム９１は、フレーム等の固定部材に支持された枢支軸９２周りに揺動自在とされている。前記枢支軸９２は、前記当接部材９５と前記膨出部３３との間において、前記回転体１０の径方向に沿うように前記固定部材に支持されている。
【００５５】
該押し下げカム９１は、前述の通り、作動位置に位置する操作部材８１に設けられた当接部材９５にのみ係合し、且つ、固定位置に位置する操作部材８１に設けられた当接部材９５とは係合しないように配設されている。
即ち、該押し下げカム９１は、作動位置に位置された操作部材８１の当接部材９５の公転軌道上に配設されている。
【００５６】
詳しくは、該押し下げカム９１は、前記回転体１０の回転に応じて作動位置に位置された操作部材８１の当接部材９５によって押圧係合される傾斜面９１ａと、該接部材９５による該傾斜面９１ａへの作用に応じて前記膨出部３３を下方へ押圧する押圧部９１ｂとを備えている。
【００５７】
該押し下げカム９１は、前記当接部材９５による押圧力が付加されない状態においては、前記傾斜面９１ａが前記当接部材９５の公転軌道上に位置し且つ前記押圧部９１ｂが前記膨出部３３と非係合となる初期姿勢（図４（ａ））に位置するように構成されている。
具体的には、該押し下げカム９１は、該カム機構９０に備えられる付勢部材９６及び停止ピン９７によって、前記当接部材９５による作用が付加されない限り、初期姿勢に保持されている。
【００５８】
この図４（ａ）の状態から、作動状態にある下杵３０ｂが公転すると、該下杵３０ｂに対応する操作部材８１に取り付けられた当接部材９５（即ち、作動位置に位置する操作部材８１に取り付けられた当接部材９５）が、初期姿勢にある前記押し下げカム９１の傾斜面９１ａを押圧する。斯かる動作により、該押し下げカム９１は、前記枢支軸９２周りに前記初期姿勢から揺動し、前記押圧部９１ｂが前記下杵３０ｂの膨出部３３を下方へ押圧する押圧姿勢をとる（図４（ｂ））。これにより、該下杵３０ｂは強制的に下方へ押動される。
なお、前記下杵３０ｂが前記押し下げカム９１を通過すると、該押し下げカム９１は、前記付勢部材９６及び前記停止ピン９７の作用によって初期姿勢に戻る。
【００５９】
他方、固定状態にある下杵３０ａには、前述の通り、当接部材９５が取り付けられていない。従って、該下杵３０ａは前記押し下げカム９１による下方への押動力を受けない。
【００６０】
このように、前記カム機構９０においては、作動状態におかれている下杵３０ｂにのみ前記当接部材９５を取り付けることで、該作動状態の下杵３０ｂのみを確実に案内面５１に沿って案内させることができる。
【００６１】
なお、本実施の形態においては、前記押し下げカム９１を、初期姿勢と押圧姿勢との間で枢支軸９２周りに揺動するように構成したが、該押し下げカムは斯かる形態に限定されるものではない。
図５に、他の形態の押し下げカム９１’を採用したカム機構９０’を示す。なお、該カム機構９０’において、図４に示すカム機構と同一部材には同一符号を付し、且つ、対応する部材には同一符号に（’）を付しいている。
【００６２】
図５に示すように、該押し下げカム９１’は、前記押し下げカム９１と同様に、傾斜面９１ａ’が前記当接部材９５の公転軌道上に位置し且つ前記押圧部９１ｂ’が前記膨出部３３と非係合となる初期姿勢と、前記当接部材９５によって押圧されることにより前記傾斜面９１ａ’が該当接部材９５の公転軌道と交差しないように移動し、これにより、前記押圧部９１ｂ’が前記膨出部３３を押圧する押圧姿勢とをとり得るように構成されている。
【００６３】
但し、該押し下げカム９１’は、前記押し下げカム９１とは異なり、初期姿勢と押圧姿勢との間で上下動し得るように構成されている。
具体的には、該押し下げカム９１’は、上下方向に沿って形成された溝９１ｃ’と、該溝９１ｃ’内に係入される停止ピン９７’とを有している。
又、該カム機構９０’は、前記カム機構９０と同様に、押し下げカム９１’を初期姿勢に付勢する付勢部材９６を有している。
【００６４】
斯かる構成により、該押し下げカム９１’は、当接部材９５が取り付けられた作動状態の下杵３０ｂの公転に応じ、該下杵３０ｂを最上部５１ａから下降部５１ｂへ強制的に案内する。
【００６５】
なお、前記各実施の形態においては、前記当接部材９５を前記操作部材８１に設け、該操作部材８１の作動位置／固定位置への１アクションによって、下杵３０の作動状態／固定状態の選択と、当接部材９５と押し下げカム９１との係合／非係合とを行えるように構成したが、本発明は斯かる形態に限定されるものではない。
即ち、前記当接部材９５を前記複数の下杵３０のそれぞれに着脱自在に取付可能とし、該当接部材９５を前記複数の下杵３０のうち作動状態にある下杵３０ｂ（操作部材８１が作動位置に置かれている下杵）にのみ取り付けるように構成することも可能である。
【００６６】
【発明の効果】
本発明に係る回転圧縮成形機は、複数の下杵のそれぞれを選択的に上死点に固定する固定状態と、上下動可能な作動状態とに操作する操作機構を備えている為、該操作機構によって不要な形状及び／又は外径に対応した下杵を固定状態とし、且つ、該不要な下杵に対応した上杵を取り外すという簡単な作業によって、所望の形状及び／又は外径の圧縮成形品を得ることができる。
従って、単一の回転圧縮成形機によって少量多種の圧縮成形品を極めて効率的に製造することができる。
又、固定状態とされた下杵は、上端部が前記臼部の上端開口と略同一となる上死点に固定される為、該固定状態の下杵に対応した臼部内に被成形材料が充填されるという不都合も生じない。従って、キャップ等の追加部材を備えることなく、被成形材料の無駄を有効に防止できる。
【００６７】
さらに、前記下杵の公転に応じて該下杵の上下動を案内する案内機構が案内面によって該下杵を案内する場合には、下杵を案内面の最上部から下降部へ強制的に移行させるカム機構を備えることができる。
斯かる構成によれば、下杵の公転速度が高速となった場合であっても、該下杵の上下動を制御性良く行わせることができる。
【図面の簡単な説明】
【図１】図１は、本発明の一実施の形態に係る回転圧縮成形機の展開縦断面図である。
【図２】図２は、図１に示す回転圧縮成形機において、対応する一の上杵及び一の下杵の状態変化を時系列で示した縦断面図である。
【図３】図３は、図１に示す回転圧縮成形機に備えられる操作機構の縦断模式図である。図３（ａ）は、前記操作機構の操作に基づき下杵が上死点に固定された固定状態を示している。図３（ｂ）は、前記操作機構の操作に基づき下杵が上下動可能とされた作動状態を示している。
【図４】図４は、図１に示す回転圧縮成形機に備えられるカム機構の動作説明図である。図４（ａ）は、前記カム機構による作用が前記下杵に付加される前の状態を示している。図４（ｂ）は、前記カム機構による作用が前記下杵に付加されている状態を示している。
【図５】図５は、図４に示すカム機構と異なるカム機構の動作説明図である。
【符号の説明】
１回転圧縮成形機
１０回転体
１１臼部
２０上杵
３０下杵
３１下杵の杵部
３２下杵の頭部
３３下杵の膨出部
４０上杵加圧機構
５０案内機構
５１案内面
５１ａ最上部
５１ｂ下降部
５１ｃ分量部
５１ｄ渡し部
５１ｅ押上部
５２案内部材
６０下杵加圧機構
７０材料供給部
８０操作機構
８１操作部材
９０カム機構
９１押し下げカム
９１ａ傾斜面
９１ｂ押圧部
９５当接部材[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rotary compression molding machine for compression molding a material to be molded such as a powder.
[0002]
[Prior art]
A rotating body that is driven to rotate horizontally about a vertical rotation axis, the rotating body having a plurality of dies along a circumferential direction, and a rotator that is vertically movably inserted from an upper opening and a lower opening of the mortar. A rotary compression molding machine that includes a punch and a lower punch, and compression-molds a molding material such as a powder filled into the die by the upper punch and the lower punch. Used in the field.
[0003]
By the way, in the conventional rotary compression molding machine, when changing the outer diameter of the compression molded product, the currently mounted mortar, upper punch and lower punch must be exchanged, so that small-quantity multi-form manufacturing is required. Had the problem of being unsuitable.
[0004]
That is, in the rotary compression molding machine, the outer diameter of the compression molded product is defined by the inner diameter of the die and the diameter of the upper punch and the lower punch inserted into the die.
Therefore, when the specification is changed from a state in which a compression molded article having a diameter of X1 mm is manufactured to a state in which a compression molded article having a diameter of X2 mm is manufactured, one mill portion, one upper punch and one lower part corresponding to X1 mm are required. It is necessary to replace the punch with another mortar corresponding to X2 mm, another upper punch, and another lower punch. Such exchange is usually performed by engaging the lower punch and guiding the vertical movement of the lower punch. A part of the guide mechanism to be removed has to be removed, which is a very troublesome operation.
[0005]
As described above, the conventional rotary compression molding machine has not given sufficient consideration to such a change in specifications, and as a result, is not suitable for the production of a small number of multi-shapes.
[0006]
[Problems to be solved by the invention]
The present invention has been made in view of such a conventional technique, and can easily perform specification change from a state of manufacturing a compression molded article of one shape to a state of manufacturing a compression molded article of another shape. An object is to provide a rotary compression molding machine.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a rotating body that is horizontally rotated around a vertical rotation axis, wherein a rotating body in which a plurality of dies can be installed along a circumferential direction, A plurality of upper punches each of which is vertically movably inserted into the portion from above, the plurality of upper punches revolving around the vertical rotation axis in synchronization with the horizontal rotation of the rotating body, and the plurality of dies. A plurality of lower punches each of which is vertically movably inserted into a portion from below, wherein the plurality of lower punches revolve around the vertical rotation axis in conjunction with horizontal rotation of the rotating body; An upper punch pressing mechanism that pushes the punches from the upper dead center where the lower end of the upper punch is located above the mortar to the lower dead center where the lower end of the upper punch is located in the mortar. A guide mechanism disposed below the rotating body, wherein the lower punch is moved upward according to the revolution of the lower punch. A top dead center whose portion is substantially the same as the upper end opening of the mortar portion, a guide mechanism for vertically moving the upper end portion between a bottom dead center located at a predetermined lower position in the mortar portion, and the rotating body. A lower punch pressing mechanism disposed to face the upper punch pressing mechanism and pressing the lower punch upward; and each of the plurality of lower punches being engaged with the revolving motion of the lower punch. A rotary compression molding machine provided with an operation mechanism for selectively operating between a fixed state in which the lower punch is fixed to a top dead center and an operation state in which the lower punch can be moved up and down in accordance with the revolving motion of the lower punch.
[0008]
Preferably, the operating mechanism is a plurality of operating members provided corresponding to each of the plurality of lower punches, and engages with the corresponding lower punches to fix the lower punch at the top dead center. An operating member is provided which can assume a fixed position and an operating position where the engagement with the corresponding lower punch is released and the lower punch can be moved up and down.
More preferably, the lower punch has a holding recess into which at least a part of the operating member is engaged when the operating member is located at a fixed position.
[0009]
For example, the guide mechanism, along the revolving direction of the lower punch, an uppermost portion that positions the lower punch at the top dead center, a lowering portion that guides the lower punch downward from the uppermost portion, and the lower punch. A guide having a dispensing part to be held at a predetermined dispensing position, a transfer part arranged so as to sandwich the lower punch pressurizing body from the dispensing part, and a push-up part for shifting the lower punch from the transfer part to the uppermost part. A surface may be provided.
In such an embodiment, preferably, the rotary compression molding machine may have a cam mechanism for forcibly shifting the lower punch from the uppermost portion to the lowering portion.
The cam mechanism is a push-down cam disposed in a transition region from the uppermost portion to the descending portion, and a contact member provided on the operation member, and when the operation member is located at the operation position, Has a contact member that does not engage with the push-down cam and engages with the push-down cam when the operating member is located at the fixed position.
[0010]
In the aspect including the cam mechanism, preferably, the lower punch is a punch portion inserted into the mortar portion, a head located below the mortar portion, and bulges radially outward from the head portion. Bulging portion.
The press-down cam presses the swelling portion downward in accordance with the inclined surface engaging with the contact member according to the revolution of the lower punch and the action of the contact member on the inclined surface. And a pressing portion.
[0011]
In one aspect, the push-down cam is swingable around a pivot shaft extending along the radial direction of the rotating body between the contact member and the bulging portion.
In such an aspect, the push-down cam is pressed by the contact member with an initial posture in which the inclined surface is located on the orbit of the contact member and the pressing portion is disengaged from the bulging portion. By doing so, the inclined surface swings around the pivot axis so as not to intersect with the movement path of the contact member, whereby the pressing portion can take a pressing posture in which the pressing portion presses the bulging portion. Is configured.
[0012]
In another aspect, the push-down cam is vertically movable and the initial posture in which the inclined surface is located on the orbit of the contact member and the pressing portion is disengaged from the bulging portion, By being pressed by the abutting member, the inclined surface moves downward so as not to intersect with the movement path of the corresponding abutting member, whereby the pressing portion can take a pressing posture of pressing the bulging portion. It is configured as follows.
[0013]
The cam mechanism further includes an urging member for urging the push-down cam toward the initial posture.
[0014]
Preferably, the guide mechanism may include a guide member for holding the bulging portion of the lower punch in cooperation with a descending portion of the guide surface.
The guide member is configured such that the uppermost end position is substantially the same as the uppermost end position of the guide surface or lower than the uppermost end position of the guide surface.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of a rotary compression molding machine according to the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows a developed longitudinal sectional view of a rotary compression molding machine 1 according to the present embodiment.
[0016]
As shown in FIG. 1, the rotary compression molding machine 1 is provided with a rotating body 10 that is driven and rotated horizontally around a vertical rotation axis (not shown), and is movably disposed above the rotating body 10. A plurality of upper punches 20, a plurality of lower punches 30 disposed below the rotating body 10 so as to be vertically movable, and an upper punch pressing mechanism 40 for pushing the plurality of upper punches 20 downward, respectively. A guide mechanism 50 for guiding each of the plurality of lower punches 30; and a lower punch pressing mechanism 60 for pressing each of the plurality of lower punches upward.
The arrow in FIG. 1 indicates the rotation direction of the rotating body 10.
[0017]
The rotary compression molding machine 1 performs compression molding by narrowly pressing a molding material such as powder filled in a mortar portion 11 installed along the circumferential direction on the rotating body 10 by the upper punch 20 and the lower punch 30. Used to manufacture goods.
In addition, the rotary compression molding machine 1 can be used for manufacturing various compression molded products such as epoxy resin molded products for semiconductor encapsulation, chemicals, bath additives, button batteries, confectionery and the like.
[0018]
As described above, the rotating body 10 can be provided with a plurality of mortar portions 11 along the circumferential direction.
Specifically, the rotating body 10 has a plurality of through holes 12 extending in the circumferential direction. The through-hole 12 is opened above and below the rotating body 10 so that the die 11 having a desired inner diameter can be detachably installed.
[0019]
In the present embodiment, as shown in FIG. 1, the rotating body 10 has a first mortar portion 11a having a first inner diameter (X1 mm) and a second mortar portion having a second inner diameter (X2 mm) alternately along the circumferential direction. A second mill 11b is provided.
[0020]
Each of the plurality of upper punches 20 has substantially the same outer diameter as the inner diameter of the corresponding die 11, and a punch 21 that is vertically movably fitted into the die 11, And a head 22 having a diameter larger than the inner diameter of the corresponding mill portion 11.
[0021]
Such an upper punch 20 is disposed so as to revolve around the vertical rotation axis in synchronization with the horizontal rotation of the rotating body 10, and a lower end of the punch 21 is provided in a predetermined position in a corresponding die. The lower end of the punch 21 can be moved up and down between the lower dead center located at the position and the upper dead center where the lower end of the punch 21 retreats above the corresponding mortar.
[0022]
In the present embodiment, the plurality of upper punches 20 include a first upper punch 20a corresponding to the first mill 11a and a second upper punch 20b corresponding to the second mill 11b. .
The outer diameters of the first and second upper punches 20a and 20b are slightly smaller (for example, 0.1 mm) than X1 mm and X2 mm, respectively.
[0023]
The upper punch pressing mechanism 40 is configured to press the upper punch 20 from a top dead center to a bottom dead center when the revolving upper punch 20 is located at a predetermined circumferential position around the vertical rotation axis. ing.
The upper punch pressing mechanism 40 provides a narrow pressure when compressing the material to be molded in cooperation with the lower punch pressing mechanism 60.
[0024]
The plurality of lower punches 30 each have a slightly smaller diameter (for example, 0.1 mm) than the inner diameter of the corresponding mill 11, and a punch 31 that is vertically movably fitted into the mill 11 from below. It has a head 32 extending downward from the punch 31 and having a diameter larger than the inner diameter of the corresponding mill 11.
[0025]
In the present embodiment, the plurality of lower punches 30 include a first lower punch 30a corresponding to the first mill 11a, and a second lower punch 30b corresponding to the second mill 11b. .
[0026]
Thus, the first upper punch 20a and the first lower punch 30a corresponding to the first mortar 11a are inserted into the first mortar 11a, and the second mortar 11b is inserted into the second mortar 11b. The second upper punch 20b and the second lower punch 30b corresponding to the portion 11b are inserted.
[0027]
The lower punch pressing mechanism 60 is disposed so as to face the upper punch pressing mechanism 40 with the rotating body 10 interposed therebetween.
That is, the upper punch pressing mechanism 40 and the lower punch pressing mechanism 60 are disposed at the same circumferential position with respect to the vertical rotation axis.
Accordingly, when one upper punch 20 and one lower punch 30 corresponding to the one upper punch 20 are revolved to the same circumferential position as the upper punch pressing mechanism 40 and the lower punch pressing mechanism 60, The molding material 110 is compressed by the one upper punch 20 and the one lower punch 30, whereby the compression molded product 100 is manufactured.
[0028]
The guide mechanism 50 is configured to engage with the plurality of lower punches 30 below the rotating body 10.
Specifically, the guide mechanism 50 moves each of the plurality of lower punches 30 up and down in response to the plurality of lower punches 30 revolving around the vertical rotation axis in conjunction with the horizontal rotation of the rotating body 10. It is configured to be.
[0029]
More specifically, the guide mechanism 50 is configured such that each of the plurality of lower punches 30 has a top dead center whose upper end is substantially the same as the upper end opening of the mill portion 11 according to the revolving position, and the upper end has the upper punch. It is configured to move up and down between a lower dead center located at a predetermined lower position in the mortar portion 11.
[0030]
Specifically, the guide mechanism 50 has a guide surface 51 that contacts the lower end of the head 32 of the lower punch 30.
The guide surface 51 includes an uppermost portion 51a that positions the lower punch 30 at the top dead center along a revolving direction of the lower punch 30, and a descending portion 51b that guides the lower punch 30 downward from the uppermost portion 51a. A dispensing portion 51c for holding the lower punch 30 at a predetermined dispensing position, a transfer portion 51d disposed so as to sandwich the lower punch pressurizing member 60 from the dispensing portion 51c, and a transfer portion 51d for transferring the lower punch 30 from the transfer portion 51d. And a push-up portion 51e for shifting to the uppermost portion 51.
[0031]
Preferably, the lower punch 30 may include a bulging portion 33 bulging radially outward from the head portion 32.
In such a preferred embodiment, the guide mechanism 50 can include a guide member 52 for holding the bulging portion 33 of the lower punch 30 in cooperation with the descending portion 51b of the guide surface 51.
The uppermost position of the guide member 52 is substantially the same as the uppermost position (the uppermost portion 51a) of the guide surface 51 or is located below the uppermost position of the guide surface.
[0032]
Here, a schematic operation of the rotary compression molding machine 1 having such a configuration will be described.
FIG. 2 is a longitudinal cross-sectional view showing a state change of one upper punch (second upper punch 20b) and one lower punch (second lower punch 30b) according to the horizontal rotation of the rotating body 10 in time series. .
[0033]
When the lower punch 30b is located at the uppermost position, the lower punch 30b is held at the top dead center.
From this state, when the lower punch 30b revolves in conjunction with the rotation of the rotating body 10, the lower punch 30b moves from the uppermost portion 51a to the lowering portion 51b.
As shown in FIG. 2, the rotary compression molding machine 1 includes a material supply section 70 at a position corresponding to the descending section 51b and the metering section 51c.
With such a configuration, when the lower punch 30b moves from the uppermost portion 51a to the metering portion 51c via the descending portion 51b, the molding material 110 is filled in the corresponding die portion 11b.
[0034]
Further, when the rotating body 10 rotates, the lower punch 30b is pushed upward by the lower punch pressing mechanism 60. At this time, the corresponding upper punch 20b is also pushed downward by the upper punch pressing mechanism 40. Therefore, the molding material 110 filled in the corresponding die portion 11b is narrowed by the upper punch 20b and the lower punch 30b to form a compression molded product 100 having an outer diameter corresponding to the inner diameter of the die portion 11b.
The height of the compression-molded article 100 can be adjusted by the pressing stroke of the upper punch 20b and the lower punch 30b.
[0035]
When the rotating body 10 is further rotated from this state, the lower punch 30b is moved to the transfer portion 51d.
On the other hand, the upper punch 20b is returned to the top dead center again after being pushed by the upper punch pressing mechanism 40.
[0036]
Thereafter, in response to the rotation of the rotating body 10, the lower punch 30b moves to the uppermost portion 51a again via the push-up portion 51e.
The upward movement of the lower punch 30b pushes the compression-molded article 100 to the upper surface of the rotating body 10.
[0037]
As described above, the rotary compression molding machine 1 according to the present embodiment is configured so that the compression molding 100 can be manufactured by horizontally rotating the rotating body 10 around a vertical rotation axis. The rotary compression molding machine 1 further includes a selection mechanism 80 that activates only a desired lower punch (in the present embodiment, the second lower punch 30b) of the plurality of lower punches 30. Thus, a small number of multi-compression molded products can be efficiently manufactured by one rotary compression molding machine.
[0038]
FIG. 3 is a schematic vertical sectional view of the operation mechanism 80.
As shown in FIG. 3, the operation mechanism 80 has a plurality of operation members 81 provided corresponding to each of the plurality of lower punches 30.
[0039]
The operation member 81 engages with the corresponding lower punch 30 based on an external operation to fix the lower punch 30 to the top dead center (FIG. 3A). It is configured to be able to assume an operating position (FIG. 3B) in which the engagement is released and the lower punch 30 can be moved up and down.
[0040]
In the present embodiment, the operating member 81 is provided on the rotating body 10 so as to be movable in the radial direction.
That is, in the present embodiment, the operating member 81 takes the fixed position when positioned radially outward of the rotating body 10 with respect to the vertical rotation axis, and The operating position can be taken when it is located radially inward.
[0041]
Preferably, when the corresponding operating member 81 is located at the fixed position, a part of the operating member 81 (an engaging pin 82 in the drawing) is engaged with each of the plurality of lower punches 30. Holding recess 35 can be provided.
With such a configuration, the lower punch 30 can be reliably held at the top dead center when the operation member 81 is located at the fixed position.
[0042]
Since the rotary compression molding machine 1 according to the present embodiment includes the operation mechanism 80, it can efficiently cope with the production of a small number of multi-shapes.
As described above, the rotary compression molding machine 1 includes a first die 11a, a first upper punch 20a, and a first lower punch 30a for manufacturing a compression molded product having an outer diameter of X1 mm, and a compression molded product having an outer diameter of X2 mm. Has a second mill 11b, a second upper punch 20b, and a second lower punch 30b for manufacturing the same.
[0043]
In such a rotary compression molding machine 1, for example, the operating member 81 corresponding to the first lower punch 30a is positioned at a fixed position (FIG. 3A), and the operating member 81 corresponding to the second lower punch 30b is moved. A compression-molded product having an outer diameter of X2 mm can be manufactured by positioning it in the operating position (FIG. 3B) and removing the first upper punch 20a (see FIG. 1).
[0044]
That is, by such a setting, the first lower punch 30a is held at the top dead center irrespective of its revolving position, and the upper end of the punch 31 of the first lower punch 30a and the upper opening of the corresponding mill 11a. It is held at substantially the same position. Therefore, the molding material 110 is not supplied from the material supply unit 70 to the mortar portion 11a into which the first lower punch 30a is inserted. Can be prevented (see FIG. 1).
The removal of the upper punch 20 can be performed more easily than the removal of the lower punch 30. Therefore, unnecessary removal of the upper punch (in this example, the first upper punch 20a) can be performed in a relatively short time.
[0045]
Further, when the specification is changed from manufacturing the compression molded article 100 having the outer diameter X2 mm to manufacturing a compression molded article having the outer diameter X1 mm, the operating member 81 corresponding to the first lower punch 30a is operated. Position, and the operating member 81 corresponding to the second lower punch 30b is positioned at the fixed position, the first upper punch 20a is attached, and the second upper punch 20b is simply removed, which can be easily dealt with. .
[0046]
As described above, in the rotary compression molding machine in which the mortar portion 11, the upper punch 20, and the lower punch 30 are set so that a plurality of compression molded products can be manufactured, by providing the operation mechanism 80, a small amount of It can deal with the production of compressed products in a very efficient manner.
[0047]
In the present embodiment, a case where two types of compression molded articles having an outer diameter can be manufactured has been described as an example. However, the present invention naturally produces three or more types of compression molded articles having an outer diameter. The case is also applicable.
Further, the present invention can be applied not only to the production of a compression-molded product having two or more external shapes but also to an outer diameter. In such a case, the mortar portion, the upper punch and the lower punch are combined with one another for producing a compression molded article having one external shape and another combination for producing a compression molded article having another external shape. And combinations.
[0048]
More preferably, the rotary compression molding machine 1 can include a cam mechanism 90 for forcibly shifting only the lower punch 30 in the operating state from the uppermost portion 51a of the guide surface 51 to the descending portion 51b. The controllability of the vertical movement of the lower punch 30 can be improved.
[0049]
For example, when the lower punch 30 moves from the uppermost portion 51a to the descending portion 51b, if the revolution speed of the lower punch 30 (the rotation speed of the rotating body 10) is sufficiently low, the lower punch 30 The transition from the uppermost portion 51a to the descending portion 51b is smoothly made by its own weight.
On the other hand, when the revolving speed of the lower punch 30 becomes higher, the transition from the uppermost portion 51a of the lower punch 30 to the descending portion 51b is prevented by the centrifugal force acting on the lower punch 30.
[0050]
The cam mechanism 90 is provided to prevent such inconvenience.
FIG. 4 is a developed sectional view for explaining the operation of the cam mechanism.
In FIG. 4, the removed upper punch 20a corresponding to the fixed lower punch 30a is shown by a two-dot chain line.
[0051]
As shown in FIG. 4, the cam mechanism 90 includes a push-down cam 91 disposed in a transition area from the uppermost portion 51a to the lowering portion 51b, and a revolving motion of the lower punch 30 interlocked with the rotation of the rotating body 10. And a contact member 95 that engages with the lower punch 30b in the operating state.
[0052]
In the present embodiment, the contact member 95 is provided on the operation member 81.
More specifically, the contact member 95 does not engage with the push-down cam 91 when the operating member 81 is at the fixed position, and the push-down cam when the operating member 81 is at the operating position. It is arranged so as to engage with 91 (see FIG. 3).
[0053]
That is, when the operation member 81 is located at the fixed position, the contact member 95 provided on the operation member 81 is offset from the push-down cam 91, and when the operation member 81 is located at the operation position, the operation is started. The contact member 95 provided on the member 81 is located at a position where it can be engaged with the push-down cam 91.
[0054]
The push-down cam 91 is swingable around a pivot 92 supported by a fixed member such as a frame. The pivot shaft 92 is supported by the fixing member along the radial direction of the rotating body 10 between the contact member 95 and the bulging portion 33.
[0055]
As described above, the push-down cam 91 engages only with the contact member 95 provided on the operation member 81 located at the operating position, and also engages with the contact member 95 provided on the operation member 81 located at the fixed position. Are arranged so as not to be engaged with.
That is, the push-down cam 91 is disposed on the orbit of the contact member 95 of the operation member 81 located at the operating position.
[0056]
More specifically, the push-down cam 91 has an inclined surface 91 a that is pressed and engaged by the contact member 95 of the operation member 81 positioned at the operating position in accordance with the rotation of the rotating body 10, and the inclination by the contact member 95. And a pressing portion 91b for pressing the bulging portion 33 downward according to the action on the surface 91a.
[0057]
In a state where the pressing force of the contact member 95 is not applied, the press-down cam 91 is configured such that the inclined surface 91 a is located on the orbit of the contact member 95 and the pressing portion 91 b is in contact with the bulging portion 33. It is configured to be located in an initial posture (FIG. 4 (a)) in which it is not engaged.
Specifically, the push-down cam 91 is held in the initial position by the urging member 96 and the stop pin 97 provided in the cam mechanism 90, unless the action by the contact member 95 is added.
[0058]
When the lower punch 30b in the operating state revolves from the state of FIG. 4A, the contact member 95 attached to the operating member 81 corresponding to the lower punch 30b (that is, the operating member 81 located at the operating position). Abuts on the inclined surface 91a of the push-down cam 91 in the initial position. With this operation, the push-down cam 91 swings around the pivot shaft 92 from the initial posture, and takes a pressing posture in which the pressing portion 91b presses the bulging portion 33 of the lower punch 30b downward ( FIG. 4 (b)). Thereby, the lower punch 30b is forcibly pushed downward.
When the lower punch 30b passes through the push-down cam 91, the push-down cam 91 returns to the initial position by the action of the urging member 96 and the stop pin 97.
[0059]
On the other hand, the contact member 95 is not attached to the fixed lower punch 30a as described above. Therefore, the lower punch 30a does not receive the downward pressing force of the pressing cam 91.
[0060]
As described above, in the cam mechanism 90, by attaching the contact member 95 only to the lower punch 30b that is in the operating state, only the lower punch 30b in the operating state can be reliably moved along the guide surface 51. You can be guided.
[0061]
In the present embodiment, the pressing-down cam 91 is configured to swing around the pivot 92 between the initial position and the pressing position, but the pressing-down cam is not limited to such a configuration. Not something.
FIG. 5 shows a cam mechanism 90 'employing another type of push-down cam 91'. In the cam mechanism 90 ', the same members as those of the cam mechanism shown in FIG. 4 are denoted by the same reference numerals, and the corresponding members are denoted by the same reference numerals (').
[0062]
As shown in FIG. 5, similarly to the press-down cam 91, the press-down cam 91 'has an inclined surface 91a' located on the orbit of the contact member 95 and the pressing portion 91b 'has the bulging portion 91b'. The inclined surface 91a 'is moved so as not to intersect with the orbit of the corresponding contact member 95 by being pressed by the contact member 95 and the initial posture disengaged from the engagement portion 33, whereby the pressing portion 91b ′ Can take a pressing posture for pressing the bulging portion 33.
[0063]
However, unlike the push-down cam 91, the push-down cam 91 'is configured to be able to move up and down between an initial position and a pressed position.
Specifically, the push-down cam 91 'has a groove 91c' formed along the vertical direction and a stop pin 97 'engaged in the groove 91c'.
Further, the cam mechanism 90 'has an urging member 96 for urging the push-down cam 91' to the initial position, similarly to the cam mechanism 90.
[0064]
With such a configuration, the push-down cam 91 ′ forcibly guides the lower punch 30 b from the uppermost portion 51 a to the descending portion 51 b according to the revolution of the lower punch 30 b in the operating state to which the contact member 95 is attached.
[0065]
In each of the above embodiments, the contact member 95 is provided on the operation member 81, and the operation state / fixed state of the lower punch 30 is selected by one action of the operation member 81 to the operation position / fixed position. And the engagement / disengagement of the contact member 95 and the push-down cam 91 can be performed, but the present invention is not limited to such an embodiment.
That is, the contact member 95 is detachably attachable to each of the plurality of lower punches 30, and the corresponding contact member 95 is the lower punch 30 b (the operating member 81 is operated) of the lower punch 30 in the operating state. It is also possible to constitute so that it can be attached only to the lower punch) located at the position.
[0066]
【The invention's effect】
The rotary compression molding machine according to the present invention is provided with an operating mechanism for operating a fixed state in which each of the plurality of lower punches is selectively fixed to the top dead center and an operating state capable of moving up and down. Compression of a desired shape and / or outer diameter is performed by a simple operation of fixing a lower punch corresponding to an unnecessary shape and / or outer diameter by a mechanism and removing an upper punch corresponding to the unnecessary lower punch. A molded article can be obtained.
Therefore, a small number of types of compression molded products can be produced very efficiently by a single rotary compression molding machine.
Further, since the lower punch in the fixed state is fixed to the upper dead center where the upper end is substantially the same as the upper end opening of the mortar, the material to be molded is placed in the mortar corresponding to the lower punch in the fixed state. There is no disadvantage of being filled. Therefore, waste of the molding material can be effectively prevented without providing an additional member such as a cap.
[0067]
Furthermore, when the guide mechanism for guiding the vertical movement of the lower punch according to the revolution of the lower punch guides the lower punch by the guide surface, the lower punch is forcibly moved from the uppermost portion of the guide surface to the descending portion. A cam mechanism for shifting can be provided.
According to such a configuration, even when the revolving speed of the lower punch increases, the vertical movement of the lower punch can be performed with good controllability.
[Brief description of the drawings]
FIG. 1 is a developed vertical sectional view of a rotary compression molding machine according to an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view showing a state change of a corresponding one of an upper punch and a lower punch in a time series in the rotary compression molding machine shown in FIG.
FIG. 3 is a schematic vertical sectional view of an operation mechanism provided in the rotary compression molding machine shown in FIG. 1; FIG. 3A shows a fixed state in which the lower punch is fixed to the top dead center based on the operation of the operation mechanism. FIG. 3B shows an operation state in which the lower punch can be moved up and down based on the operation of the operation mechanism.
FIG. 4 is an operation explanatory view of a cam mechanism provided in the rotary compression molding machine shown in FIG. 1; FIG. 4A shows a state before the action of the cam mechanism is added to the lower punch. FIG. 4B shows a state where the action of the cam mechanism is added to the lower punch.
FIG. 5 is an operation explanatory view of a cam mechanism different from the cam mechanism shown in FIG. 4;
[Explanation of symbols]
1 rotary compression molding machine
10 Rotating body
11 mortar
20 Upper punch
30 lower punch
31 Lower punch
32 Lower punch head
33 bulge of lower punch
40 Upper punch pressure mechanism
50 Guide mechanism
51 Guideway
51a Top
51b descending part
51c Dispensing part
51d handover
51e Oshiage
52 Guide member
60 Lower punch pressure mechanism
70 Material Supply Department
80 Operation mechanism
81 Operating members
90 cam mechanism
91 Push-down cam
91a Inclined surface
91b Pressing part
95 Contact member

Claims

A rotating body that is horizontally rotated around a vertical rotation axis, and a rotating body in which a plurality of mortar portions can be installed along a circumferential direction,
A plurality of upper punches which are inserted to be vertically movable from above with respect to the plurality of mortars, respectively, and a plurality of upper punches revolving around the vertical rotation axis in synchronization with horizontal rotation of the rotating body,
A plurality of lower punches inserted to be vertically movable from below with respect to the plurality of dies, respectively, and a plurality of lower punches revolving around the vertical rotation axis in conjunction with horizontal rotation of the rotating body,
An upper punch which pushes the plurality of upper punches from a top dead center where the lower end of the upper punch is located above the mill to a lower dead center where the lower end of the upper punch is located inside the mill. A pressure mechanism,
A guide mechanism disposed below the rotating body, wherein the lower punch is moved in accordance with the revolution of the lower punch, and the upper dead end of the lower punch is substantially the same as the upper end opening of the die. A guide mechanism for moving the part up and down between a bottom dead center located at a predetermined lower position in the mortar part,
A lower punch pressing mechanism disposed to face the upper punch pressing mechanism with the rotating body interposed therebetween, and pressing the lower punch upward.
Each of the plurality of lower punches is selectively operated to a fixed state in which the lower punch is fixed to the top dead center regardless of the revolving motion of the lower punch, and an operating state in which the vertical movement can be performed according to the revolving motion of the lower punch. A rotary compression molding machine comprising an operation mechanism.

The operating mechanism is a plurality of operating members provided corresponding to each of the plurality of lower punches, a fixing position to engage with the corresponding lower punch and fix the lower punch to the top dead center. 2. The rotary compression molding according to claim 1, further comprising an operating member capable of releasing an engagement with the corresponding lower punch so as to take an operating position for vertically moving the lower punch. Machine.

3. The rotary compression molding according to claim 2, wherein the lower punch has a holding recess into which at least a part of the operating member is engaged when the operating member is located at a fixed position. Machine.

The guide mechanism, along the revolving direction of the lower punch, an uppermost portion that positions the lower punch at the top dead center, a lowering portion that guides the lower punch downward from the uppermost portion, A dispensing portion to be held at a dispensing position, and a guide surface having a push-up portion for shifting the lower punch to the uppermost portion again,
The rotary compression molding machine further includes a cam mechanism for forcibly moving the lower punch from the uppermost portion to the lowering portion,
A push-down cam disposed in a transition region from the uppermost portion to the lowering portion,
A contact member provided on the operating member, wherein the pressing member does not engage with the push-down cam when the operating member is located at the operating position, and the push-down cam is located when the operating member is located at the fixed position. The rotary compression molding machine according to claim 2, further comprising a contact member that engages with the cam.

The lower punch has a punch portion inserted into the mortar portion, a head located below the mortar portion, and a swelling portion bulging radially outward from the head portion.
The push-down cam has an inclined surface that engages with the contact member according to the revolution of the lower punch, and a pressing portion that presses the bulging portion downward according to the action of the contact member on the inclined surface. And having
The push-down cam is swingable around a pivot shaft extending along the radial direction of the rotating body between the contact member and the bulging portion, and the inclined surface moves the contact member. The initial position, which is located on the path and the pressing portion is disengaged from the bulging portion, and the inclined surface is pressed by the contact member so that the inclined surface does not intersect with the movement path of the contact member. Swinging around a pivot axis, whereby the pressing portion is configured to be able to take a pressing posture for pressing the bulging portion,
The rotary compression molding machine according to claim 4, wherein the cam mechanism further includes an urging member for urging the push-down cam toward the initial posture.

The lower punch has a punch portion inserted into the mortar portion, a head located below the mortar portion, and a swelling portion bulging radially outward from the head portion.
The push-down cam has an inclined surface that engages with the contact member according to the revolution of the lower punch, and a pressing portion that presses the bulging portion downward according to the action of the contact member on the inclined surface. And having
The press-down cam is movable vertically, and the initial posture in which the inclined surface is located on the movement path of the contact member and the pressing portion is disengaged from the bulging portion, By being pressed by the contact member, the inclined surface moves downward so as not to intersect with the movement path of the contact member, so that the pressing portion can take a pressing posture of pressing the bulging portion. Is composed of
The rotary compression molding machine according to claim 4, wherein the cam mechanism further includes an urging member for urging the push-down cam toward the initial posture.

The guide mechanism has a guide member for holding the bulging portion of the lower punch under cooperation with a descending portion of the guide surface,
7. The guide member according to claim 4, wherein the guide member is configured such that an uppermost end position thereof is substantially the same as an uppermost end position of the guide surface or is located below the uppermost end position of the guide surface. The rotary compression molding machine according to any one of the above.