JP4387490B2

JP4387490B2 - Inorganic hydraulic molded product molding equipment

Info

Publication number: JP4387490B2
Application number: JP12382699A
Authority: JP
Inventors: 成雄安藤; 正雄安藤; 豊禄安藤
Original assignee: 成雄安藤
Priority date: 1999-04-30
Filing date: 1999-04-30
Publication date: 2009-12-16
Anticipated expiration: 2019-04-30
Also published as: JP2000313006A

Description

【０００１】
【発明の属する技術分野】
本発明は無機水硬性成形品の成形装置に関し、例えばセメントモルタル、粘土、セラミック、石膏等の無機水硬性材料よりなる成形品を直接棒状弁により下方から押上げて成形面からの離型を行うとともに離型ガスを成形面に設けたガス噴射孔から噴射させて金型の成形面からの成形品の離型を効率的に行い、しかも上型に対する成形品の吸着性を助成するようにした。
【０００２】
【従来の技術】
従来、無機水硬性成形品、例えばセメントモルタルの成形品成形装置には、特公平５−８８６４２号公報に記載の発明がある。
すなわち、図７に示すように上型ａおよび下型ｂよりなる金型の一方、すなわち上型ａの成形面ｃに成形品Ｎに対する圧縮時に搾水や吸気を行うのに設けられた複数の通孔部ｄと、他方の金型としての下型ｂの成形面ｅに開口する複数の離型ガス噴射孔ｆと、該離型ガス噴射孔ｆを介して前記下型ｂの成形面ｅに連通して他方の金型としての下型ｂ内に設けられるガス供給通路ｇと、成形材料Ｎ′を金型の成形面ｅに供給する時点から成形完了後の離型開始時点まで前記離型ガス噴射孔ｆを閉鎖し成形面ｅと面一になる閉鎖位置および成形面ｅとガス供給通路ｇを連通する開放位置との２位置間を移動可能な棒状弁ｈとを備えたものである。
そして、金型としての上型ａと下型ｂとの成形面に無機水硬性材料よりなるセメントモルタルのような成形材料Ｎ′を投入し、上型ａと下型ｂとを少なくとも一方が他方に対向する方向に移動させることにより加圧、圧縮し、金型としての上型ａの成形面ｃに設けた複数の通孔部ｄを通じて搾水、吸水して成形品Ｎを成形する。
次いで、一方の金型としての上型ａを他方の金型としての下型ｂに対して相反する方向に移動し、一方の金型としての下型ｂの成形面ｅに設けた複数の離型ガス噴射孔ｆから離型ガスＧを噴射させて成形品Ｎを離型させる。それから、他方の金型としての上型ａの成形面ｃに複数の通孔部ｄを介して真空吸引させて一方の金型の成形面ｃに成形品Ｎを吸着させる。
【０００３】
【発明が解決しようとする課題】
図７に示す上記従来のセメントモルタルの成形品成形装置は、上型ａと下型ｂとよりなる金型相互によって圧縮成形される成形品Ｎは、一方の金型としての下型ｂの成形面ｅに設けた複数の離型ガス噴射孔ｆを通じて離型ガスＧを噴射させることにより成形品Ｎの離型を行うのにすぎない。そして、他方の金型としての上型ａの成形面ｃに設けた複数の通孔部ｄを介して成形品Ｎは真空吸引されるものである。
このように従来のセメントモルタルの成形品成形装置は、離型ガスＧを噴射させるだけで、成形品Ｎの離型を行うものであるので、成形品Ｎの離型作業に多くの時間がかかり、非能率であった。しかも成形品Ｎの型離れが悪いので、他方の金型としての上型ａに対する成形品Ｎの吸着能率が低く、成形サイクルが長く非能率的であった。
また上型ａと下型ｂとよりなる金型による成形品Ｎの圧縮成形時に、一方の金型としての下型ｂの成形面ｅに設けた複数の離型ガス噴射孔ｆと該離型ガス噴射孔ｆ内に挿入される棒状弁ｈの先端部ｈ₁との間の間隙から成形品Ｎに含まれる水分が侵入するので、この水分が上型ａと下型ｂによる成形品Ｎの成形後に離型ガス噴射孔ｆから再び成形品Ｎの表面に噴射し、折角成形した成形品Ｎの表面を損ない綺麗な仕上がり精度にて成形することができないという不都合を生じていた。
本発明は上記従来の不都合を解決し、成形品の離型時には成形品を金型の一方に設けたガス供給通路内に配挿した棒状弁体により下方から直接押上げて離型を行うとともに離型ガスを離型ガス噴射孔から噴射させて金型の成形面からの成形品の離型を効率的に行い、しかも上型に対する成形品の吸着を助成し、成形サイクルの格段の効率化をはかり、さらには成形品の成形時に複数の離型ガス噴射孔と棒状弁の先端部との間の間隙からガス供給通路内に侵入される水分を確実に外部に排水して成形品の表面に対する仕上がり精度を損なうことなく高精度な無機水硬性成形品の成形装置を提供しようとするものである。
【０００４】
【課題を解決するための手段】
本発明は上記課題に鑑みなされたものであり、請求項１は、上型および下型よりなる金型の一方の成形面に成形品に対する圧縮時に搾水や吸気を行うのに設けられる複数の通孔部と、他方の金型の成形面に開口する離型ガス噴射孔と、該離型ガス噴射孔を介して成形面に連通し、他方の金型内に設けられるガス供給通路と、成形材料を金型の成形面に供給する時点から成形完了後の離型開始時点まで前記離型ガス噴射孔を閉鎖し成形面と面一になる閉鎖位置および成形面とガス供給通路を連通する開放位置とのガス供給通路内の２位置間を移動可能に設けた棒状弁とを備え、成形品の成形完了後に離型ガスを離型ガス噴射孔から噴射して離型を行う無機水硬性成形品の成形装置において、前記棒状弁は先端部が離型ガス噴射孔を閉鎖し、ガス導入孔を一側に有するガス供給通路内に配挿されて成形品を押圧可能に設けられ、前記棒状弁に対して排水弁を上下動可能にガス供給通路内に設けたことを特徴とするという手段を採用した。
【０００５】
また本発明の請求項２は、請求項１において前記棒状弁は排水弁と別体に形成されることにより該棒状弁と他方の金型との間に介装されるばね材により先端部が離型ガス噴射孔を閉鎖可能にガス供給通路内に配挿され、前記排水弁は前記ばね材のばね力に抗して前記棒状弁を強制的に突出可能に設けられることを特徴とするという手段を採用した。
【０００６】
また本発明の請求項３は、請求項１において前記棒状弁は排水弁と一体に形成され先端部が離型ガス噴射孔を閉鎖可能にガス供給通路内に上下動可能に配挿されることを特徴とするという手段を採用した。
【０００７】
また本発明の請求項４は、請求項１、または請求項２、請求項３の何れかにおいて前記棒状弁の先端部と該先端部が挿入される離型ガス噴射孔の内周との間にはガス供給通路に連通可能な排水間隙が形成され、前記排水弁の開閉により前記排水間隙を通じて成形時の排水がガス供給通路内に導入されて排水制御されることを特徴とするという手段を採用した。
【０００８】
また本発明の請求項５は、請求項２において上型および下型よりなる金型の一方に設けられたガス供給通路内に配挿される棒状弁と、該棒状弁を保持するばね材とは金型に対して所望数個設けられたことを特徴とするという手段を採用した。
【０００９】
また本発明の請求項６は、請求項１において前記通孔部が上型の成形面に、離型ガス噴射孔が下型の成形面に設けられることを特徴とするという手段を採用した。
【００１０】
また本発明の請求項７は、請求項１において前記通孔部が下型の成形面に、離型ガス噴射孔が上型の成形面に設けられることを特徴とするという手段を採用した。
【００１１】
また本発明の請求項８は請求項４において離型ガス噴射孔に対する棒状弁の先端部に形成される前記排水間隙は横断面積が平面略円形をなす離型ガス噴射孔に対して平面略方形をなす一定の縮小径部に形成されることを特徴とするという手段を採用した。
【００１２】
また本発明の請求項９は請求項１、または請求項２、請求項３の何れかにおいて前記排水弁はシリンダの駆動により油圧回路を通じて排水位置と止水位置とに上下動して切換動作されることを特徴とするという手段を採用した。
【００１３】
【発明の実施の形態】
以下、本発明の実施の形態の具体例を図面を参照して説明する。
図１および図６は本発明の一実施例を示す。
１は金型としての上型、２は上型１に対向して下方に配置される下型である。これらの金型としての上型１および下型２は一方が他方に対して図には示さないシリンダの駆動により対向する方向または離反する方向に各々上下動するか、または上型１および下型２が相互に対向する方向または離反する方向に上下動して成形品Ｎを成形するようになっている。
３は下方の金型としての下型２の外周に図には示さないシリンダの駆動により上下動する型枠である。
【００１４】
そして、上型１および下型２の一方、図示する実施例では上型１の成形面Ｓ₁に成形品Ｎの成形時における搾水や吸気を行うのに設けられた複数の通孔部４と、他方の金型としての下型２の成形面Ｓ₂に開口する複数の離型ガス噴射孔５と、該離型ガス噴射孔５を介して前記成形面Ｓ₂に連通して他方の金型としての下型２内に設けられるガス供給通路６と、成形材料Ｎ′を下型２の成形面Ｓ₂に供給する時点から成形完了後の離型開始時点まで前記離型ガス噴射孔５を閉鎖し成形面Ｓ₂と面一になる閉鎖位置および離型ガス噴射孔５から移動されることにより成形面Ｓ₂とガス供給通路６を連通する開放位置との２位置を移動可能な棒状弁７とを備え、成形品Ｎの成形後に離型ガスＧを離型ガス噴射孔５から噴射して成形品Ｎの離型を行うようにする。また前記通孔部４は上方の上型１の成形面Ｓ₁に、また離型ガス噴射孔５は下方の下型２の成形面Ｓ₂に設けられる点は図７に示すような従来の成形品の成形装置と同様である。
また成形品Ｎを成形するための成形材料Ｎ′としては、例えばセメントモルタル、粘土、セラミック、石膏等の水硬性無機材料が使用される。
【００１５】
そして、本実施例では前記棒状弁７は、該棒状弁７と他方の金型としての下型２との間に介装されるばね材８より先端部７ａが成形品Ｎの下面を直接押上可能に離型ガス噴射孔５を有するガス供給通路６内に配挿され、前記棒状弁７を前記ばね材８のばね力に抗して強制的に突出可能な排水弁９を上下動可能にガス供給通路６内の下方に別体に分離して設けている。前記ばね材８は下型２に対する棒状弁７の組付を簡便に行って保持するためと、平均したむらのないばね力を発揮して棒状弁７の上下動を確実にするために図示するようなコイルばねが最適に使用される。
このようにばね材８により保持される棒状弁７を別体に分離して設けた排水弁９の先端にてばね材８のばね力に抗して突出可能にしたのは、離型ガス噴射孔５に対する棒状弁７の製作精度および組付精度とガス供給通路６の弁座６ａに対する大径外周部９ａと小径部９ｂを有する排水弁９の製作精度および組付精度を必要以上に高くしなくても離型ガス噴射孔５に対する棒状弁７の上下動と開閉動作とを確実に行って離型ガスＧの制御と成形品Ｎからの外部への排水を確実に行うためである。
【００１６】
７ａ₁は図５に示すように前記棒状弁７の先端部７ａと該先端部７ａを挿入するための離型ガス噴射孔５の内周との間に下方のガス供給通路６に連通可能に形成された排水間隙であり、この排水間隙７ａ₁は横断面積Ｔが平面略円形の離形ガス噴射孔５に対して平面略方形をなす一定の縮小径部７ａ₂が形成されることによりこの縮小径部７ａ₂の外周に形成される。
なお、縮小径部７ａ₂は図示する実施例では平面略方形をなす一定の縮小径部７ａ₂に形成されているが、これは代表例であり、図示するものに限らず平面略五角形、平面略六角形、平面略八角形等の多角形等であってもよい。要は棒状弁７が離型ガス噴射孔５から離脱した時に離型ガス噴射孔５との間に排水間隙７ａ₁が形成されることにより成形品Ｎからの排水が行えるのと離型ガスＧの噴出とを行うようにすればよい。
【００１７】
前記棒状弁７を排水位置と止水位置とに切換動作するための棒状の前記排水弁９は、油圧回路１０を通じてシリンダ１１の駆動により上下動するようになっている。１１ａはシリンダ１１のピストン部であり、このピストン部１１ａの先端に前記排水弁９は取付けられる。
そして、この排水弁９は成形品Ｎの離型時に駆動源としてのシリンダ１１のピストン部１１ａが上昇する棒状弁７の突出時に、大径外周部９ａがガス供給通路６の下方部の内周に設けた環状の弁座６ａに挿入されてガス供給通路６を閉弁することによりガス導入孔１２を通じてガス供給通路６内に導入される離型ガスＧを上方の離型ガス噴射孔５から成形品Ｎに噴射して下型２の成形面Ｓ₂に対する成形品Ｎの離型を行う。また排水弁９の上方外周にはシリンダ１１のピストン部１１ａの降下時に、前記弁座６ａから大径外周部９ａが脱挿されて開弁されることにより成形品Ｎからガス供給通路６内に侵入した水分を大径外周部９ａの下方に位置するガス供給通路６の下方外周に設けた排水孔１３から排水するように連通可能な空隙１４を形成するための小径部９ｂが形成されている。
【００１８】
１５は一方の金型としての上型１の成形面Ｓ₁に取付けられた濾過板装置であり、この濾過板装置１５は成形品Ｎの成形時に吸引搾水するように脱水布１６と、金網１７と、水切鉄板１８とを重ね合わして形成される。
【００１９】
本発明の一実施例は以上の構成からなり、成形品Ｎを成形するには金型の一方の下型２に対して図には示さないシリンダを駆動させて型枠３を上昇させ、成形材料としての無機水硬性材料よりなる例えばセメントモルタルを下型２と型枠３に囲まれる成形空間部内に所望量が投入する（図１参照）。その後に図には示さない別のシリンダを駆動させて金型としての上型１または下型２の一方を他方に対して対向する方向に降下するかまたは上昇させるか、或いは上型１および下型２の双方を対向する方向に上昇または降下することにより上型１と下型２とで成形材料Ｎ′を加圧、圧縮する。そして、上型１の成形面Ｓ₁に設けた複数の通孔部４を通じて成形品Ｎから生ずる水分を図には示さない真空ポンプにより真空吸引して搾水や吸気を行って成形品Ｎを成形するようにする点は従来の成形装置と同様である。
この時、図２に示すように金型の一方の下型２には、成形面Ｓ₂に連通するガス供給通路６が設けられ、このガス供給通路６内に配挿されている棒状弁７の先端部７ａが成形面Ｓ₂と一致する高さにばね材８により保持されて成形品Ｎの成形が行われるように離型ガス噴射孔５を閉塞し、成形品Ｎから生ずる水がガス供給通路６内に侵入するのを阻止している。
【００２０】
しかもシリンダ１１のピストン部１１ａは降下し、ピストン部１１ａの先端部に取付けられている排水弁９は図１に示すようにガス供給通路６内に配挿している棒状弁７の下端に対する突出がない状態に降下され、排水弁９の上方外周に形成されている小径部９ｂがガス供給通路６の下方部に設けた弁座６ａから脱挿されて弁座６ａとの間に空隙１４が形成され排水弁９は開弁状態になるので、ガス供給通路６内に侵入した水分は排水孔１３から金型の外部に排水される。このため、ガス供給通路６内に侵入される成形品Ｎから生ずる水分が、後記説明のように離型ガス噴射孔５から噴射される離型ガスＧの加圧力により折角加圧成形した成形品Ｎの表面に勢い良く衝突して表面の仕上げ精度を損なうような不都合を解消することができる。
【００２１】
そして、本実施例では成形品Ｎの離型時に、図３に示すように金型の一方の上型１を他方の金型の下型２に対して数ｍｍ程度、僅かに上昇してからシリンダ１１が駆動されてピストン１１ａが伸長すると、このピストン１１ａに取付けられた排水弁９はガス供給通路６の下方部内に設けられた弁座６ａ内に挿入されることにより閉弁されて排水孔１３に対する連通状態を遮断するとともに先端部がばね材８のばね力に抗して棒状弁７を上方へ突出させる。
このため、棒状弁７の先端部７ａにより成形品Ｎは下面が押上げられ、下型２の成形面Ｓ₂ からの離型が直接的に行われる。しかも棒状弁７の先端部７ａが成形面Ｓ₂ に対して上昇することにより下型２の成形面Ｓ₂ に連通するガス噴射孔５の閉塞を開放するので、離型ガス導入孔１２からガス供給通路６内に導入される離型ガスＧは離型ガス噴射孔５から噴射されることにより成形品Ｎを押上げて前述のように棒状弁７の直接的な押上げによる離型とともに成形品Ｎの離型を迅速かつ効率的に行う。なお、図示する実施例ではガス供給通路６内に配挿される棒状弁６は１本が、また離型ガス噴射孔５は１個が下型２に設けられているが、成形品Ｎの下面積の広狭と、成形品Ｎの重量の軽重、搾水状態等に応じて設置個数の増減変更は自由に行なうことができる。
【００２２】
しかも、離型ガス噴射孔５から噴射される離型ガスＧによる下面からの押上げによって上型１の成形面Ｓ₁に設けた複数の通孔部４を通じて成形面Ｓ₁に吸着される成形品Ｎの上型１への吸着を助成して吸着能率が高く、成形サイクルが短時間になる。
その後、上型１は成形面Ｓ₁に成形品Ｎを吸着して所望高さまで上昇した後にそのまま水平方向に移動し、成形品Ｎを図に示さない受台に載置し、成形品Ｎの受渡しを行う。
それから、上型１は下型２に整合する位置まで旧位に水平移動し、成形品Ｎを成形する場合の１サイクルが完了する。
【００２３】
なお図示する実施例では、金型の一方としての上型１に複数の通孔部４を設けて成形品Ｎに対する吸引、搾水をなし、また下型２にガス供給通路６を設け、このガス供給通路６配挿される棒状弁７と、この棒状弁７を保持するばね材８と、該ばね材８のばね力に抗して棒状弁７を突出すための排水弁９とを１個図示することにより成形品Ｎに対して棒状弁７により直接に突出しを行うほか、成形品Ｎに対して離型ガスＧを噴出して離型を迅速かつ確実に行うようにしているが、ガス供給通路６、棒状弁７、ばね材８、排水弁９はそれぞれ成形品Ｎの下面積の広狭、成形品Ｎの重量の軽狭、搾水状態等に応じて複数個設けることにより成形品Ｎに平均的な力を加えてひび割れや形崩れすることなく前記実施例よりさらに迅速かつ効率的に離型を行うようにでき、しかも設置個数は上記説明に限ることなく、その増減変更は自由に行える。
【００２４】
また上記実施例では、ガス供給通路６内に離型ガス噴射孔５を閉鎖するように配挿される棒状弁７に対して排水弁９を別体に形成してばね材８のばね力に抗して排水弁９により棒状弁７を強制的に突出可能に設けているが、図には示さないが棒状弁７は排水弁９と一体に形成されることにより先端部７ａが離型ガス噴射孔５をばね材８を用いずに閉鎖するようにガス供給通路６内に上下動可能にシリンダ１１の駆動により配挿されるようにすることもできる。
【００２５】
また、図示する上記実施例では、金型の一方の上型１の成形面Ｓ₁に複数の通孔部４を設け、他方の下型２の成形面Ｓ₂に棒状弁７を配挿するとともに離型ガスＧを噴射するための離型ガス噴射孔５を設けているが、反対に下型２の成形面Ｓ₂に通孔部４を設け、上型１の成形面Ｓ₂に離型ガス噴射孔５を設けることもできる。
【００２６】
【発明の効果】
以上のように本発明の請求項１は、上型および下型よりなる金型の一方の成形面に成形品に対する圧縮時に搾水や吸気を行うのに設けられる複数の通孔部と、他方の金型の成形面に開口する離型ガス噴射孔と、該離型ガス噴射孔を介して成形面に連通し、他方の金型内に設けられるガス供給通路と、成形材料を金型の成形面に供給する時点から成形完了後の離型開始時点まで前記離型ガス噴射孔を閉鎖し成形面と面一になる閉鎖位置および成形面とガス供給通路を連通する開放位置とのガス供給通路内の２位置間を移動可能に設けた棒状弁とを備え、成形品の成形完了後に離型ガスを離型ガス噴射孔から噴射して離型を行う無機水硬性成形品の成形装置において、前記棒状弁は先端部が離型ガス噴射孔を閉鎖し、ガス導入孔を一側に有するガス供給通路内に配挿されて成形品を押圧可能に設けられ、前記棒状弁に対して排水弁を上下動可能にガス供給通路内に設けたので、成形品の離型時には成形品を金型の一方に設けたガス供給通路内に配挿した棒状弁体により下方から直接押上げて離型を行うとともに離型ガスを離型ガス噴射孔から噴射させて金型の成形面からの成形品の離型を効率的に行うことができる。しかも上型に対する成形品の吸着を助成し、成形サイクルの格段の向上をはかることができ、さらには成形品の成形時に複数の離型ガス噴射孔と棒状弁の先端部との間の間隙からガス噴射通路内に侵入される水分を確実に外部に排水して成形品の表面に対する仕上がり精度を損なうことなく高精度な無機水硬性成形品を成形することができる。
【００２７】
また本発明の請求項２によれば、前記棒状弁は排水弁と別体に形成されることにより該棒状弁と他方の金型との間に介装されるばね材により先端部が離型ガス噴射孔を閉鎖可能にガス供給通路内に配挿され、前記排水弁は前記ばね材のばね力に抗して前記棒状弁を強制的に突出可能に設けられることを特徴としたので、排水弁はばね材のばね力に抗して棒状弁を強制的に突き上げて先端部が離型ガス噴射孔から突出して無機水硬性成形品よりなる成形品を直接棒状弁により押上げて成形面からの離型を行うとともに離型ガスを離型ガス噴射孔から噴出させて成形品の離型が効率的に行える。
【００２８】
また本発明の請求項３によれば、前記棒状弁は排水弁と一体に形成され先端部が離型ガス噴射孔を閉鎖可能にガス供給通路内に上下動可能に配挿されることを特徴としたので、棒状弁が排水弁と一体にガス供給通路内に上下動して棒状弁により成形品を押上げて成形面からの離型を行うとともに離型ガス噴射孔から離型ガスを噴出して成形品の離型を効率的に行うことができ、部品数も少なく製作および組付けは容易である。
【００２９】
また本発明の請求項４によれば、前記棒状弁の先端部と該先端部が挿入されるガス噴射孔の内周との間にはガス供給通路に連通可能な排水間隙が形成され、前記排水弁の開閉により前記排水間隙を通じて成形時の排水がガス供給通路内に導入されて迅速かつ確実に排水し制御することができる。
【００３０】
また、本発明の請求項５によれば、上型および下型よりなる金型の一方に設けられたガス供給通路内に配挿される棒状弁と、該棒状弁を保持するばね材とは金型に対して所望数個設けられたので、棒状弁を金型の一方または他方にばね材の附勢力に抗して容易に組付けることができる。また、本発明の請求項６によれば、前記通孔部が上型の成形面に、離型ガス噴射孔が下型の成形面に設けられ、また、請求項７によれば、前記通孔部が下型の成形面に、離型ガス噴射孔が上型の成形面に設けられるので、成形時には、通孔部を介して搾水が行え、しかも、離型時には離型ガス噴射孔から離型ガスを噴射することにより離型を効率的に行うことができる。
また本発明の請求項８によれば、離型ガス噴射孔に対する棒状弁の先端部に形成される排水間隙は横断面積が平面略円形をなす離型ガス噴射孔に対して平面略方形をなす一定の縮小径部に形成されるので、成形品の成形時には棒状弁の先端部が成形面に一致して離型ガス噴射孔を閉塞することにより成形に寄与するのと、成形品から生ずる水分がガス供給通路内に侵入するのを阻止して離型ガスの噴射時に成形品に対して噴出することを阻止することができ、１つの部品を数機能に使用することができ、製作および組付けが容易でコンパクト化がはかれる。
【００３１】
また本発明の請求項９によれば、棒状弁とともにガス供給通路内に配挿される排水弁はシリンダの駆動による油圧回路を通じて排水位置と止水位置とに上下動して応答性良く切換動作されるので、棒状弁を開閉することにより成形時における成形品からのガス供給通路内への水分の侵入を阻止するとともに離型時には離型ガスを離型ガス噴射孔から迅速かつ確実に噴出することができ、さらにはガス供給通路内に侵入した成形品からの水分を金型の外部に確実に排水することができる利点を有する。
【図面の簡単な説明】
【図１】本発明の無機水硬性成形品の成形装置の一実施例を示し、成形材料を金型の成形面に投入した状態の断面図である。
【図２】同じく成形品の成形時における断面図である。
【図３】同じく成形品の離型時における断面図である。
【図４】図３のＡ−Ａ拡大断面図である。
【図５】同じく図３のＢ−Ｂ拡大断面図である。
【図６】同じく棒状弁の先端部と離型ガス噴射孔とを示す分解斜視図である。
【図７】従来の無機水硬性成形品の成形装置の一例を示す断面図である。
【符号の説明】
１上型
２下型
３型枠
４通孔部
５離型ガス噴射孔
６ガス供給通路
７棒状弁
７ａ先端部
７ａ₁ 排水間隙
７ａ₂ 縮小径部
８ばね材
９排水弁
９ａ外周大径部
９ｂ小径部
１１シリンダ
Ｎ成形品
Ｓ₁ 成形面
Ｓ₂ 成形面[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a molding apparatus for an inorganic hydraulic molded article, and for example, a molded article made of an inorganic hydraulic material such as cement mortar, clay, ceramic, gypsum, etc. is directly pushed up from below by a rod-shaped valve to release from the molding surface. At the same time, the mold release gas is injected from the gas injection holes provided on the molding surface to efficiently release the molded product from the molding surface of the mold, and to support the adsorptivity of the molded product to the upper mold. .
[0002]
[Prior art]
Conventionally, there is an invention described in Japanese Patent Publication No. 5-88642 in an apparatus for forming a molded article of an inorganic hydraulic molded article, for example, a cement mortar.
That is, as shown in FIG. 7, one of the molds composed of the upper mold a and the lower mold b, that is, a plurality of the water provided or drawn into the molding surface c of the upper mold a when the molded product N is compressed. A through hole portion d, a plurality of release gas injection holes f opened on the molding surface e of the lower mold b as the other mold, and the molding surface e of the lower mold b through the release gas injection holes f The gas supply passage g provided in the lower mold b as the other mold and the time when the molding material N ′ is supplied to the molding surface e of the mold until the mold release start time after the completion of molding. A rod-shaped valve h that is movable between two positions: a closed position where the mold gas injection hole f is closed and flush with the molding surface e, and an open position where the molding surface e communicates with the gas supply passage g. is there.
Then, a molding material N ′ such as cement mortar made of an inorganic hydraulic material is introduced into the molding surfaces of the upper mold a and the lower mold b as molds, and at least one of the upper mold a and the lower mold b is the other. The molded product N is molded by pressurizing and compressing by moving in a direction opposite to the surface, and squeezing and absorbing water through a plurality of through holes d provided on the molding surface c of the upper mold a as a mold.
Next, the upper mold a as one mold moves in a direction opposite to the lower mold b as the other mold, and a plurality of separations provided on the molding surface e of the lower mold b as one mold. The release gas G is injected from the mold gas injection hole f to release the molded product N. Then, the molding surface c of the upper mold a as the other mold is vacuum-sucked through the plurality of through holes d, and the molded product N is adsorbed to the molding surface c of one mold.
[0003]
[Problems to be solved by the invention]
In the conventional cement mortar molded product molding apparatus shown in FIG. 7, the molded product N that is compression-molded by a mold composed of an upper mold a and a lower mold b is formed by molding the lower mold b as one mold. The molded product N is merely released by injecting the release gas G through the plurality of release gas injection holes f provided on the surface e. And the molded product N is vacuum-sucked through the several through-hole part d provided in the molding surface c of the upper mold | type a as the other metal mold | die.
As described above, the conventional cement mortar molded product molding apparatus is configured to release the molded product N simply by injecting the mold release gas G. Therefore, it takes a lot of time to release the molded product N. Was inefficient. Moreover, since the mold N of the molded product N is poor, the adsorption efficiency of the molded product N with respect to the upper mold a as the other mold is low, and the molding cycle is long and inefficient.
Further, when the molded product N is formed by compression using a mold composed of an upper mold a and a lower mold b, a plurality of release gas injection holes f provided on the molding surface e of the lower mold b as one mold and the mold release Since moisture contained in the molded product N enters from the gap between the tip end h ₁ of the rod-shaped valve h inserted into the gas injection hole f, this moisture is introduced into the molded product N by the upper mold a and the lower mold b. After molding, the surface of the molded product N is sprayed again from the release gas injection hole f, and the surface of the molded product N that has been bent is damaged, so that it cannot be molded with clean finish accuracy.
The present invention solves the above-mentioned conventional disadvantages, and at the time of releasing a molded product, the molded product is directly released from below by a rod-shaped valve element inserted in a gas supply passage provided on one side of the mold, and then released. The release gas is injected from the release gas injection holes to efficiently release the molded product from the molding surface of the mold, and further support the adsorption of the molded product to the upper mold, which makes the molding cycle much more efficient. In addition, when the molded product is molded, the water that enters the gas supply passage through the gaps between the plurality of release gas injection holes and the tip of the rod-shaped valve is surely drained to the outside and the surface of the molded product is Therefore, an object of the present invention is to provide a highly precise forming apparatus for an inorganic hydraulic molded product without impairing the finishing accuracy.
[0004]
[Means for Solving the Problems]
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and claim 1 includes a plurality of parts provided to squeeze water or suck air during compression of a molded product on one molding surface of a mold composed of an upper mold and a lower mold. a hole portion, and a release gas injection hole opened to the molding surface of the other mold, communicates with the molding surface through the mold release gas injection holes, and the gas supply passage provided in the other side of the mold The mold release gas injection hole is closed from the time when the molding material is supplied to the molding surface of the mold to the time when mold release is started, and the molding surface and the gas supply passage communicate with each other. perform by injecting the releasing gas injection holes release Bei example a rod-like valve movable between two positions of the gas supply passage, a release gas after completion molding formed molded article and an open position in which in the molding apparatus of the inorganic hydraulic moldings, the rod-shaped valve tip closes the mold releasing gas injection holes, gas It is arranged in a gas supply passage having an inlet hole on one side so that the molded product can be pressed, and a drain valve is provided in the gas supply passage so as to be movable up and down with respect to the rod-shaped valve. The method was adopted.
[0005]
According to a second aspect of the present invention, in the first aspect, the rod-shaped valve is formed separately from the drain valve, so that the tip portion is formed by a spring material interposed between the rod-shaped valve and the other mold. The release gas injection hole is inserted in the gas supply passage so as to be closed, and the drain valve is provided so as to be able to forcibly protrude the rod-shaped valve against the spring force of the spring material. Adopted means.
[0006]
According to a third aspect of the present invention, in the first aspect, the rod-shaped valve is integrally formed with the drain valve, and the tip portion is inserted in the gas supply passage so as to be movable up and down so as to close the release gas injection hole. was adopted means that the feature.
[0007]
According to a fourth aspect of the present invention, there is provided between the tip portion of the rod-shaped valve and the inner periphery of the release gas injection hole into which the tip portion is inserted in any one of the first, second, and third aspects. The drainage gap that can communicate with the gas supply passage is formed, and the drainage at the time of molding is introduced into the gas supply passage through the drainage gap by opening and closing the drainage valve, and the drainage is controlled. Adopted.
[0008]
According to a fifth aspect of the present invention, there is provided: a rod-like valve inserted in a gas supply passage provided in one of the upper die and the lower die in claim 2, and a spring material for holding the rod-like valve. A means of providing a desired number of molds for the mold was adopted.
[0009]
According to a sixth aspect of the present invention, there is adopted a means according to the first aspect, wherein the through hole portion is provided on the molding surface of the upper die and the release gas injection hole is provided on the molding surface of the lower die.
[0010]
The seventh aspect of the present invention employs the means according to the first aspect, wherein the through hole portion is provided on the molding surface of the lower mold and the release gas injection hole is provided on the molding surface of the upper mold.
[0011]
According to an eighth aspect of the present invention, in the fourth aspect, the drainage gap formed at the tip of the rod-shaped valve with respect to the release gas injection hole is substantially rectangular in plane with respect to the release gas injection hole having a substantially circular cross-sectional area. The means of being characterized by being formed in a constant reduced diameter portion forming
[0012]
According to a ninth aspect of the present invention, the drain valve according to any one of the first, second, and third aspects is switched by moving up and down between a drainage position and a water stop position through a hydraulic circuit by driving a cylinder. We adopted a means that is characterized by that.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific examples of embodiments of the present invention will be described with reference to the drawings.
1 and 6 show an embodiment of the present invention.
Reference numeral 1 denotes an upper mold as a mold, and reference numeral 2 denotes a lower mold that is arranged below the upper mold 1 so as to face the lower mold. One of the upper mold 1 and the lower mold 2 as these molds moves up and down in the opposite direction or away from each other by driving a cylinder not shown in the drawing, or the upper mold 1 and the lower mold 2 2 is moved up and down in a direction facing each other or in a direction away from each other to form a molded product N.
3 is a mold that moves up and down by driving a cylinder (not shown) on the outer periphery of the lower mold 2 as a lower mold.
[0014]
Then, in one of the upper mold 1 and the lower mold 2, in the illustrated embodiment, a plurality of through holes 4 are provided on the molding surface S ₁ of the upper mold 1 to perform squeezing and intake during molding of the molded product N. A plurality of release gas injection holes 5 opening on the molding surface S ₂ of the lower mold 2 as the other mold, and the other mold gas communicating with the molding surface S ₂ via the release gas injection holes 5. The gas supply passage 6 provided in the lower mold 2 as a mold and the mold release gas injection hole from the time when the molding material N ′ is supplied to the molding surface S ₂ of the lower mold ₂ to the time when mold release is started after completion of molding. It is possible to move between a closed position that closes the molding surface S ₂ and is flush with the molding surface S _2, and an opening position that communicates the molding surface S ₂ and the gas supply passage 6 by moving from the release gas injection hole 5. And a rod-shaped valve 7, and after the molded product N is molded, a mold release gas G is injected from the mold release gas injection holes 5 to release the molded product N. To. Further, the point that the through-hole portion 4 is provided on the molding surface S ₁ of the upper mold 1 on the upper side, and the release gas injection hole 5 is provided on the molding surface S ₂ of the lower mold 2 on the lower side as shown in FIG. This is the same as the molding apparatus for molded products.
As the molding material N ′ for molding the molded article N, hydraulic inorganic materials such as cement mortar, clay, ceramic, gypsum and the like are used.
[0015]
In the present embodiment, the rod-shaped valve 7 is such that the tip 7a directly pushes the lower surface of the molded product N from the spring material 8 interposed between the rod-shaped valve 7 and the lower mold 2 as the other mold. A drainage valve 9 that is arranged in a gas supply passage 6 having a release gas injection hole 5 and that can forcibly protrude the rod-shaped valve 7 against the spring force of the spring material 8 is movable up and down. The gas supply passage 6 is provided separately in a separate lower part. The spring material 8 is shown in order to easily hold the rod-shaped valve 7 with respect to the lower mold 2 and to hold it, and to exert an average non-uniform spring force to ensure the vertical movement of the rod-shaped valve 7. Such coil springs are optimally used.
In this way, the release of the release valve 9 that allows the rod-like valve 7 held by the spring material 8 to protrude against the spring force of the spring material 8 at the tip of the drain valve 9 provided separately. The manufacturing accuracy and assembly accuracy of the rod-shaped valve 7 with respect to the hole 5 and the manufacturing accuracy and assembly accuracy of the drain valve 9 having the large-diameter outer peripheral portion 9a and the small-diameter portion 9b with respect to the valve seat 6a of the gas supply passage 6 are made higher than necessary. This is because the vertical movement and the opening / closing operation of the rod-like valve 7 with respect to the release gas injection hole 5 can be surely performed without the control of the release gas G and the drainage from the molded product N to the outside.
[0016]
As shown in FIG. 5, 7a ₁ can communicate with the lower gas supply passage 6 between the tip 7a of the rod-like valve 7 and the inner periphery of the release gas injection hole 5 for inserting the tip 7a. a formed drainage gap, the drainage gap 7a ₁ this by cross-sectional area T is constant reduced diameter portion 7a ₂ which forms a flat, substantially rectangular with respect to releasing the gas injection holes 5 of the flat, substantially circular is formed It is formed on the outer periphery of the reduced diameter portion 7a _2.
In the illustrated embodiment, the reduced diameter portion 7a ₂ is formed as a constant reduced diameter portion 7a ₂ having a substantially rectangular plane. However, this is a representative example, and is not limited to the illustrated example. It may be a polygon such as a substantially hexagon or a plane substantially octagon. The point of the releasing gas G drainage can be performed from the molded article N by drainage gap 7a ₁ is formed between the release gas injection hole 5 when the rod-shaped valve 7 is disengaged from the release gas injection holes 5 Should be performed.
[0017]
The rod-shaped drain valve 9 for switching the rod-shaped valve 7 between the drainage position and the water stop position moves up and down by driving a cylinder 11 through a hydraulic circuit 10. 11a is a piston portion of the cylinder 11, and the drain valve 9 is attached to the tip of the piston portion 11a.
The drain valve 9 has a large-diameter outer peripheral portion 9a that is the inner periphery of the lower portion of the gas supply passage 6 when the rod-shaped valve 7 in which the piston portion 11a of the cylinder 11 as a drive source rises when the molded product N is released. The release gas G introduced into the gas supply passage 6 through the gas introduction hole 12 is inserted into the annular valve seat 6a provided in the gas supply passage 6 by closing the gas supply passage 6 from the upper release gas injection hole 5. The molded product N is released from the molding surface S ₂ of the lower mold 2 by spraying onto the molded product N. Further, when the piston portion 11a of the cylinder 11 descends, the large-diameter outer peripheral portion 9a is inserted into the gas supply passage 6 from the molded product N by being opened and removed from the valve seat 6a. A small-diameter portion 9b is formed for forming a gap 14 that can be communicated so that the invaded moisture is drained from a drain hole 13 provided in the lower outer periphery of the gas supply passage 6 positioned below the large-diameter outer peripheral portion 9a. .
[0018]
Reference numeral 15 denotes a filter plate device attached to the molding surface S ₁ of the upper die 1 as one mold, and this filter plate device 15 is provided with a dewatering cloth 16 and a metal mesh so as to suck and squeeze water when the molded product N is molded. 17 and the drained iron plate 18 are overlapped.
[0019]
An embodiment of the present invention has the above-described configuration. In order to form a molded product N, a cylinder (not shown) is driven with respect to one lower mold 2 of a mold to raise the mold 3 to form the molded product N. A desired amount of, for example, cement mortar made of an inorganic hydraulic material as a material is put into a molding space surrounded by the lower mold 2 and the mold 3 (see FIG. 1). Thereafter, another cylinder (not shown) is driven to lower or raise one of the upper die 1 or the lower die 2 as a die in a direction opposite to the other, or the upper die 1 and the lower die. The molding material N ′ is pressurized and compressed by the upper mold 1 and the lower mold 2 by raising or lowering both molds 2 in opposite directions. Then, the water generated from the molded product N is vacuum-sucked by a vacuum pump (not shown) through the plurality of through-hole portions 4 provided on the molding surface S ₁ of the upper mold 1 to perform squeezing and intake, thereby removing the molded product N. The molding is the same as in the conventional molding apparatus.
At this time, as shown in FIG. 2, a gas supply passage 6 communicating with the molding surface S ₂ is provided in one lower mold 2 of the mold, and a rod-like valve 7 inserted in the gas supply passage 6. is held in the height by means of a spring member 8 a release gas injection hole 5 as molding is carried out of the molded article N closed, the water generated from the molded article N gas of the tip 7a is coincident with the forming surface S ₂ Intrusion into the supply passage 6 is prevented.
[0020]
Moreover, the piston portion 11a of the cylinder 11 is lowered, and the drain valve 9 attached to the tip portion of the piston portion 11a is protruded from the lower end of the rod-like valve 7 inserted in the gas supply passage 6 as shown in FIG. The small-diameter portion 9b formed on the upper outer periphery of the drain valve 9 is removed from the valve seat 6a provided in the lower portion of the gas supply passage 6, and a gap 14 is formed between the valve seat 6a. Since the drain valve 9 is in the open state, the moisture that has entered the gas supply passage 6 is drained from the drain hole 13 to the outside of the mold. For this reason, the moisture produced from the molded product N that enters the gas supply passage 6 is formed by bending pressure molding with the pressure of the release gas G injected from the release gas injection hole 5 as described later. It is possible to eliminate the inconvenience of impinging on the surface of N vigorously and impairing the surface finishing accuracy.
[0021]
In this embodiment, when the molded product N is released, as shown in FIG. 3, the upper mold 1 of one mold is slightly raised about several mm from the lower mold 2 of the other mold. When the cylinder 11 is driven and the piston 11a is extended, the drain valve 9 attached to the piston 11a is closed by being inserted into a valve seat 6a provided in the lower part of the gas supply passage 6, and the drain hole. 13 and the rod-like valve 7 protrudes upward against the spring force of the spring material 8 while blocking the communication state with respect to the spring 13.
Therefore, the molded article N by the tip portion 7a of the rod-shaped valve 7 lower surface pushed up, the release from the molding surface S ₂ of the lower die 2 is performed directly. Moreover, since the tip portion 7a of the rod-shaped valve 7 opens the blockage of the gas injection hole 5 communicating with the molding surface S ₂ of the lower die 2 by raising against the forming surface S _2, gas from releasing the gas introducing hole 12 The mold release gas G introduced into the supply passage 6 is injected from the mold release gas injection hole 5 to push up the molded product N and is molded together with the mold release by directly pushing up the rod-shaped valve 7 as described above. The product N is released quickly and efficiently. In the illustrated embodiment, one rod-like valve 6 inserted in the gas supply passage 6 and one release gas injection hole 5 are provided in the lower die 2. Depending on the size of the area, the weight of the molded product N, the squeezed state, etc., the number of installations can be increased or decreased freely.
[0022]
Moreover, molding that is adsorbed to the molding surface S ₁ through a plurality of through-hole portions 4 provided in the molding surface S ₁ of the upper mold 1 by being pushed up from the lower surface by the release gas G injected from the release gas injection holes 5. Supporting the adsorption of the product N to the upper mold 1 increases the adsorption efficiency and shortens the molding cycle.
Thereafter, the upper die 1 adsorbs the molded product N to the molding surface S ₁ and moves up to a desired height, and then moves in the horizontal direction, and places the molded product N on a cradle not shown in the figure. Deliver.
Then, the upper mold 1 is horizontally moved to the old position up to a position aligned with the lower mold 2, and one cycle when the molded product N is molded is completed.
[0023]
In the illustrated embodiment, the upper mold 1 as one of the molds is provided with a plurality of through holes 4 to suck and squeeze the molded product N, and the lower mold 2 is provided with a gas supply passage 6. One rod-like valve 7 inserted in the gas supply passage 6, a spring material 8 holding the rod-like valve 7, and one drain valve 9 for projecting the rod-like valve 7 against the spring force of the spring material 8. As shown in the figure, the molded product N is directly projected by the rod-shaped valve 7 and the mold release gas G is ejected from the molded product N so as to perform the mold release quickly and reliably. The supply passage 6, the rod-shaped valve 7, the spring material 8, and the drainage valve 9 are each provided with a plurality of the molded product N according to the width of the bottom of the molded product N, the lightness of the molded product N, the squeezed state, etc. By applying an average force to the mold, the mold can be released more quickly and efficiently than in the previous embodiment without cracking or losing shape. Can the Migihitsuji, yet established number is not limited to the above description, the increase and decrease change be freely.
[0024]
In the above embodiment, the drain valve 9 is formed separately from the rod- like valve 7 that is inserted in the gas supply passage 6 so as to close the release gas injection hole 5 to resist the spring force of the spring material 8. Although the rod-like valve 7 is forcibly protruded by the drain valve 9, the rod-like valve 7 is formed integrally with the drain valve 9, although not shown in the drawing, the tip 7 a is ejected from the release gas. The hole 5 may be inserted into the gas supply passage 6 by driving the cylinder 11 so as to be movable up and down so as to be closed without using the spring material 8.
[0025]
In the embodiment shown in the figure, a plurality of through holes 4 are provided on the molding surface S _{1 of} one upper mold 1 of the mold, and the rod-like valve 7 is inserted into the molding surface S ₂ of the other lower mold 2. is provided with the release gas injection hole 5 for injecting release gas G with the through hole portion 4 to the forming surface S ₂ of the lower die 2 provided on the opposite, the molding surface S ₂ of the upper mold 1 away A mold gas injection hole 5 can also be provided.
[0026]
【The invention's effect】
As described above, the first aspect of the present invention includes a plurality of through-hole portions provided for performing water squeezing and intake during compression of a molded product on one molding surface of a mold composed of an upper mold and a lower mold, and the other and releasing the gas injection hole opened to the molding surface of the mold communicates with the molding surface through the mold release gas injection holes, and the gas supply passage provided in the other side of the mold, the molding material mold The gas at the closed position where the release gas injection hole is closed to be flush with the molding surface and the open position where the molding surface communicates with the gas supply passage from the time of supplying to the molding surface to the time of starting the mold release after completion of molding. e Bei a rod-like valve movable between two positions in the supply passage, the inorganic hydraulic moldings for performing the release gas is injected from releasing the gas injection holes release after completion molding formed molded article in the molding apparatus, the rod-shaped valve tip closes the mold releasing gas injection holes, gas having a gas introduction hole on one side The molded product is inserted into the supply passage so that the molded product can be pressed, and the drain valve is provided in the gas supply passage so that it can move up and down with respect to the rod-shaped valve. Molded from the molding surface of the mold by pushing up directly from below with a rod-shaped valve element inserted in the gas supply passage provided on one of the molds and releasing the mold release gas from the mold release gas injection holes Can be efficiently released. In addition, it is possible to support the adsorption of the molded product to the upper mold, and to greatly improve the molding cycle, and further from the gap between the plurality of release gas injection holes and the tip of the rod-shaped valve during molding of the molded product. A highly accurate inorganic hydraulic molded product can be molded without impairing the accuracy of the finished product surface by reliably draining water that enters the gas injection passage to the outside.
[0027]
According to a second aspect of the present invention, the rod-shaped valve is formed separately from the drain valve, so that the tip portion is released by the spring material interposed between the rod-shaped valve and the other mold. Since the gas injection hole is disposed in the gas supply passage so that the gas injection hole can be closed, the drain valve is provided so as to be able to forcibly protrude the rod valve against the spring force of the spring material. The valve forcibly pushes up the rod-shaped valve against the spring force of the spring material, the tip protrudes from the release gas injection hole, and the molded product made of an inorganic hydraulic molded product is pushed up directly by the rod-shaped valve from the molding surface. In addition, the molded product can be efficiently released by releasing the release gas from the release gas injection hole.
[0028]
According to a third aspect of the present invention, the rod-shaped valve is formed integrally with the drain valve, and the tip is inserted in the gas supply passage so as to be movable up and down so as to close the release gas injection hole. Therefore, the rod-shaped valve moves up and down in the gas supply passage integrally with the drain valve, pushes up the molded product by the rod-shaped valve to release from the molding surface, and ejects the release gas from the release gas injection hole. Thus, the molded product can be efficiently released, and the number of parts is small, and the manufacture and assembly are easy.
[0029]
According to claim 4 of the present invention, a drainage gap is formed between the distal end portion of the rod-shaped valve and the inner periphery of the gas injection hole into which the distal end portion is inserted. By opening and closing the drain valve, drainage at the time of molding is introduced into the gas supply passage through the drain gap, and can be drained and controlled quickly and reliably.
[0030]
According to claim 5 of the present invention, the rod-shaped valve inserted in the gas supply passage provided in one of the upper and lower molds and the spring material for holding the rod-shaped valve are a metal mold. Since the desired number is provided for the mold , the rod-like valve can be easily assembled to one or the other of the mold against the urging force of the spring material. According to claim 6 of the present invention, the through-hole portion is provided on the molding surface of the upper die, and the release gas injection hole is provided on the molding surface of the lower die. Since the hole part is provided on the molding surface of the lower mold and the release gas injection hole is provided on the molding surface of the upper mold, water can be squeezed through the through-hole part at the time of molding. The mold release can be efficiently performed by injecting the mold release gas.
According to claim 8 of the present invention, the drainage gap formed at the tip of the rod-shaped valve with respect to the release gas injection hole has a substantially rectangular plane with respect to the release gas injection hole having a substantially circular cross-sectional area. Since it is formed with a constant reduced diameter, when the molded product is molded, the tip of the rod-shaped valve coincides with the molded surface and contributes to molding by closing the release gas injection hole, and moisture generated from the molded product. Can be prevented from entering the gas supply passage, and can be prevented from being ejected to the molded product when the release gas is injected, and one part can be used for several functions. Easy to attach and compact.
[0031]
According to the ninth aspect of the present invention, the drain valve inserted in the gas supply passage together with the rod-shaped valve moves up and down between the drain position and the water stop position through a hydraulic circuit driven by the cylinder, and is switched with good responsiveness. Therefore, by opening and closing the rod-like valve, moisture can be prevented from entering the gas supply passage from the molded product during molding, and the mold release gas can be quickly and reliably ejected from the mold release gas injection hole during mold release. Furthermore, there is an advantage that moisture from the molded product that has entered the gas supply passage can be reliably drained to the outside of the mold.
[Brief description of the drawings]
FIG. 1 is a sectional view showing an embodiment of a molding apparatus for an inorganic hydraulic molded article according to the present invention in a state where a molding material is put into a molding surface of a mold.
FIG. 2 is a cross-sectional view during molding of the molded product.
FIG. 3 is a cross-sectional view of the molded product when released from the mold.
4 is an AA enlarged sectional view of FIG. 3. FIG.
5 is an enlarged cross-sectional view taken along the line BB of FIG.
FIG. 6 is an exploded perspective view showing the tip of the rod-like valve and the release gas injection hole.
FIG. 7 is a cross-sectional view showing an example of a molding apparatus for a conventional inorganic hydraulic molded product.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Upper mold | type 2 Lower mold | type 3 Mold frame 4 Through-hole part 5 Release gas injection hole 6 Gas supply passage 7 Rod valve 7a Tip part 7a ₁ Drain gap 7a ₂ Reduced diameter part 8 Spring material 9 Drain valve 9a Outer peripheral large diameter part 9b Small diameter part 11 Cylinder N Molded product S ₁ Molded surface S ₂ Molded surface

Claims

A plurality of through-hole portions provided on one molding surface of a mold composed of an upper mold and a lower mold to perform squeezing and suction when the molded product is compressed, and a release gas that opens to the molding surface of the other mold an injection hole communicated with the molding surface through the mold release gas injection holes, and the gas supply passage provided in the other side of the mold, after molding completion the time for supplying molding material to the molding surface of the mold The release gas injection hole is closed until the start of mold release, and is provided to be movable between two positions in the gas supply passage, ie, a closed position where the mold supply surface is flush with the molding surface and an open position where the molding surface communicates with the gas supply passage. painting Bei a rod-like valve, in the molding apparatus of inorganic hydraulic moldings performing by injecting releasing a release gas after completion molding formed molded article from the mold releasing gas injection hole, the rod-shaped valve tip away closing the mold gas injection holes, the molded article is inserted distribution in the gas supply passage having at one side a gas introducing hole Pressure capable provided molding apparatus inorganic hydraulic shaped article, characterized in vertically movably be provided in the gas supply passage drain valve with respect to the rod-like valve.

The rod-shaped valve is formed separately from the drain valve so that the tip portion can close the release gas injection hole by a spring material interposed between the rod-shaped valve and the other mold. The apparatus for forming an inorganic hydraulic molded article according to claim 1, wherein the drain valve is provided so as to be able to forcibly protrude the rod-shaped valve against a spring force of the spring material. .

2. The inorganic hydraulic molding according to claim 1, wherein the rod-shaped valve is formed integrally with a drain valve, and a tip end portion thereof is inserted in the gas supply passage so as to be able to move up and down so as to close the release gas injection hole. Product molding equipment.

A drainage gap that can communicate with the gas supply passage is formed between the tip of the rod-shaped valve and the inner periphery of the release gas injection hole into which the tip is inserted, and through the drainage gap by opening and closing the drainage valve. 4. The apparatus for forming an inorganic hydraulic molded article according to claim 1, wherein drainage during molding is introduced into a gas supply passage and drainage is controlled.

The rod-shaped valve inserted in the gas supply passage provided in one of the upper and lower molds and the spring material for holding the rod-shaped valve are provided in a desired number for the mold. The apparatus for forming an inorganic hydraulic molded article according to claim 2, wherein

2. The apparatus for molding an inorganic hydraulic molded article according to claim 1, wherein the through-hole portion is provided on the molding surface of the upper mold and the release gas injection hole is provided on the molding surface of the lower mold.

2. The apparatus for molding an inorganic hydraulic molded article according to claim 1, wherein the through hole portion is provided on a molding surface of the lower mold, and a release gas injection hole is provided on the molding surface of the upper mold.

The drainage gap formed at the tip of the rod-shaped valve with respect to the release gas injection hole is formed in a constant reduced diameter portion having a substantially rectangular plane with respect to the release gas injection hole having a substantially circular cross-sectional area. An apparatus for forming an inorganic hydraulic molded product according to claim 4.

4. The drain valve according to claim 1, wherein the drain valve is vertically switched between a drain position and a water stop position through a hydraulic circuit driven by a cylinder. Inorganic hydraulic molded product molding equipment.