JP4119493B2 - Cement mortar molding apparatus and molding method thereof - Google Patents

Cement mortar molding apparatus and molding method thereof Download PDF

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JP4119493B2
JP4119493B2 JP32721893A JP32721893A JP4119493B2 JP 4119493 B2 JP4119493 B2 JP 4119493B2 JP 32721893 A JP32721893 A JP 32721893A JP 32721893 A JP32721893 A JP 32721893A JP 4119493 B2 JP4119493 B2 JP 4119493B2
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mold
molding
raw material
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cement mortar
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JPH07178714A (en
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成雄 安藤
正雄 安藤
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成雄 安藤
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Description

【0001】
【産業上の利用分野】
本発明はセメントモルタル成形品の成形装置およびその成形方法に関し、例えば建築資材に使用する屋根瓦、外壁パネル、内壁パネルや土木資材に使用するセメントモルタル成形品を加圧成形するのに最適に使用される。
【0002】
【従来の技術】
従来、屋根瓦、建築の外壁パネル、内壁パネル等のセメントモルタル成形品を圧縮成形し、搾水する場合の成形装置には、例えば図4に示すものがあった。
すなわち、真空ポンプP′等の吸引手段に接続された複数の搾水孔9″を下型14に対向する上型1の下面の成形面1aに設け、且つプレス用の第1のシリンダ2によって下型14に対して上下方向に移動可能に設けられるとともに移送用の第2のシリンダ10によって水平方向に移動可能に設けた上型1と、前記下型14の外周に型枠用の第3のシリンダ16にて摺動可能に設けた型枠15とで金型を形成し、第4のシリンダ20によって移動可能になる原料投入板19を設けた構造である。
【0003】
そしてセメントモルタル成形品を加圧成形するのには、先ずシリンダ20を駆動して原料投入板19を可動することにより、前記下型14と、前記型枠15とで囲まれる成形空間部18内にセメントモルタルの原料Gを投入する。次いでプレス用のシリンダ2を駆動することにより上型1を下型14に対して下方向に移動し、成形空間部18内に投入された原料Gを加圧、成形する。この際、吸引手段によって下型14と、型枠15と、上型1とで囲まれる成形空間部18内を吸引し、減圧することにより真空状態にしながら原料Gを加圧し、搾水孔9″を通じて搾水をし、加圧成形品としてのセメントモルタル成形品A′を成形する。
【0004】
その後、プレス用の第1のシリンダ2を駆動することにより下型14に対して上型1を上昇し、次いでシリンダ16を駆動して型枠15を下型14に対して降下する。そして、移送用のシリンダ10を駆動することにより、吸引手段によってセメントモルタル成形品A′は上型1に吸引された状態で水平方向に移送され、その後受台12に載置されることにより、セメントモルタル成形品A′の運搬と離型とが行われる。
【0005】
図5に示すものは上型1の下方の成形面1aに凹凸部1bを設けることにより、上型1と下型14との加圧により成形されるセメントモルタル成形品A′が、表面にタイル模様等の複雑な模様を形成した建築資材としての外壁パネル等を加圧成形する場合である。
【0006】
【発明が解決しようとする課題】
しかしながら図4に示す上記従来のセメントモルタル成形品の成形装置においてセメントモルタル成形品A′を加圧成形する場合に、上型1と、下型14と、型枠15とで囲まれる成形空間部18内は、プレス用のシリンダ2による原料Gへの加圧の進行状態にかかわらず、上型1と、下型14とによって原料Gを加圧し、成形する当初から離型に到るまで、一様に吸引手段により減圧して高真空にされることにより原料Gから真空吸引孔5を通じて搾水を行うものである。
従って原料Gに水分が充分な量、含まれている加圧成形当初においては、一度に多量に吸引手段によって搾水が行われるが、ある程度の原料Gへの加圧が進行すると、それ以上、搾水は緩慢になり、その搾水量も少量になる。
しかもプレス用のシリンダ2は、上型1と下型14との加圧当初から加圧終わりまで、一様に高圧力で運転されることになり、不経済になっていた。
【0007】
また図4に示す上記成形装置は、セメントモルタル成形品A′が上型1と下型14とにより加圧成形されると、上型1と下型14との成形面1a,14aにセメントモルタルが付着し易いので、離型時にセメントモルタル成形品A′が上型1または下型14から容易且つ確実に離型されない。従ってセメントモルタル成形品A′は、綺麗な仕上がり面に形成されず、成形が困難であった。
【0008】
しかも、上型1と下型14とによる加圧時に、原料G中に含まれる空気が、セメントモルタル成形品A′内に残留するので、セメントモルタル成形品A′は構造的に脆弱であり、もろくカケ易いとともに綺麗な仕上面に製品は成形されなかった。
特にセメントモルタル成形品A′の表面に形成される模様が、建築資材に使用される外壁パネルのように、タイル模様等の複雑で緻密な模様である場合には、加圧時にセメントモルタル成形品A′の表面の凹凸部の内部に空気が残存し易くなり、タイル模様となるべき、表面の凹凸面が離型する際に、残留空気によりもろくカケたりして綺麗は仕上がり面のセメントモルタル成形品A′を成形することはできなかった。
【0009】
そこで本発明は、原料の搾水の実情を考慮して、その進行状況に伴って加圧を行うようになして全体的に搾水時間や脱気時間を短縮化し、経済的で効率的な加圧成形を行い、またセメントモルタル成形品の離型が容易且つ確実に行えるとともに内部に空気が残存せずに綺麗な仕上がり面にて構造堅牢に形成され、製品の歩留りを良くすることを目的とする。
【0010】
【課題を解決するための手段】
本発明は上記課題を解決するために、請求項1に記載の発明は、一方が他方に対して対向して移動可能に設けた上型および下型と、該上型または下型の何れかの外周に摺動可能に設けた型枠と、で囲まれ原料の成形空間部を有する金型が設けられ、前記上型または下型の成形面の少なくとも一方に多数の通孔が設けられ、かつ、前記通孔が吸引手段に接続されたセメントモルタル成形品の成形装置において、
(イ)前記通孔を臨む上型または下型の成形面の全面に前記通孔を覆う脱水布と金網とを重合した通水・通気手段けられ
(ロ)原料の加圧時に前記成形空間部の内圧力を検知する検知手段が設けられ、
(ハ)前記通孔を通じて前記吸引手段により吸引されて前記成形空間部内の内圧力が大気圧に近いか、または、低真空になっている搾水当初では、前記金型内の原料を大気圧により加圧し、そして、
(ニ)前記原料に対する搾水が進行して前記成形空間部の内圧力が高真空の所定圧になるのを前記検知手段が検知すると、該検知手段からの信号により、前記金型内の原料に対する加圧力を増強して前記大気圧より高くするように、制御しながら加圧成形する
ことを特徴とする。
【0011】
また本発明の請求項2の発明は、上型または下型の一方を他方に移動し、その後前記上型または下型の何れかの外周に設けた型枠を摺動させて原料を金型の成形空間部内に投入することによりセメントモルタル成形品を加圧成形する方法において、
(a)原料の加圧時に、前記上型または前記下型の成形面の少なくとも一方に設けた多数の通孔を臨む前記上型または前記下型の成形面の全面に前記通孔を覆う脱水布と金網とを重合した通水・通気手段を介して吸引手段により前記成形空間部内を吸引しながら、前記成形空間部内の内圧力が大気圧に近いか、または、低真空になっている搾水当初では、前記金型内の原料を大気圧により加圧し、そして、
(b)前記原料に対する搾水が進行して前記成形空間部の内圧力が高真空の所定圧になるのを検知手段が検知すると、前記検知手段からの信号により、前記金型内の原料に対する加圧力を増強して前記大気圧より高くするように、制御しながらセメントモルタル成型品を加圧成形する、
ことを特徴とする。
【0012】
【作用】
上型と下型とによる原料の加圧成形時に、上型と、下型と、上型または下型の何れか一方に摺動可能な型枠とで囲まれる成形空間部の内圧力を少なくとも上型または下型の成形面の何れかに設けた通孔を介して減圧し、調整しながら検知手段により検知し、上型と下型とによる原料に対する加圧力を高低制御して加圧成形する。
【0013】
【実施例】
以下、図1乃至図3に従って本発明の一実施例を説明する。
1は上型であり、この上型1は高圧のプレス用のシリンダ2内を昇降自在になるピストン3の下端に設けた上型取付板4の下面に取付けられる。
【0014】
5は第1の真空吸引孔であり、この真空吸引孔5は上型1内に内部が連通するように設けられ、真空ポンプP1 のような吸引手段に接続される。
【0015】
6は上型1の下面に設けた第1の通水・通気手段であり、この通水・通気手段6は加圧、吸引時に原料Gとしてのセメントモルタルが流れ出すのを防止するためと、離型時にセメントモルタル成形品Aが容易且つ確実に上型1または下型14に付着することなく円滑に離型するためとから、脱水布7と、この脱水布7に重合される金網8とによって形成される。そしてこの通水・通気手段6は、上型1の下面の成形面1aに有した多数の第1の通孔9を介して前記真空吸引孔5に連通され、前記吸引手段により吸引される。
【0016】
10は前記上型取付板4にピストン11が接続された移送用のシリンダであり、このシリンダ10が駆動すると、上型1は略水平方向に移動自在になり、加圧成形後のセメントモルタル成形品Aを吸着しながら、受台12まで移動する。そしてこの受台12は受台用のシリンダ13によって昇降自在になる。
【0017】
14は前記上型1の下方に設けられた下型であり、この下型14の上面の成形面14aには多数の第2の通孔9′を介して第2の真空吸引孔5′に連通され、真空ポンプP2 のような吸引手段により吸引される。6′は前記通水・通気手段6と同様構造の第2の通水・通気手段であり、この通水・通気手段6′は通孔9′が臨まれる前記下型14の上面の成形面14aに取付けられる。
【0018】
15は下型14の外周に摺動自在に設けた型枠であり、この型枠15は型枠用のシリンダ16内に昇降自在に設けた型枠用のピストン17によって昇降自在になる。
【0019】
18は前記上型1と、前記下型14と、前記型枠15とで囲まれる成形空間部であり、この成形空間部18内に原料Gが投入されることにより、原料Gは上型1と下型14とで加圧成形されてセメントモルタル成形品Aが形成される。
【0020】
19は原料投入板であり、この原料投入板19はシリンダ20によって駆動され、前記成形空間部18内へ原料Gとしてのセメントモルタルを投入するためのものである。
【0021】
前記原料Gとしては、例えば屋根瓦、建築資材としての外壁パネル、内壁パネル、土木資材としてのブロックや基礎等の成形物を形成するためのセメントモルタルがあげられる。
【0022】
21はシリンダ2のピストン3を昇降動作させるための油圧回路であり、この油圧回路21はオイルタンク22から前記シリンダ2の入力側2a1 に接続される通路23に設けたパイロット弁24と、またオイルタンク22からシリンダ2の出力側2bに接続される通路25に設けた逆止弁26とにより形成される。
この油圧回路21はさらに前記シリンダ2の入力側2a2 と前記出力側2bとに接続される通路27,28に設けた切換弁29と、該切換弁29に接続されたポンプP3 と、ポンプP3 を駆動するためのモータMとから形成される。
30は前記切換弁29と前記ポンプP3 に接続されたオイルタンクである。
【0023】
Sは上型1と、下型14と、該下型14の外周に摺動可能に設けた型枠15とに囲まれた成形空間部18内の内圧力を検知するための検知手段としてのセンサーであり、このセンサーSは成形空間部18内に設けられ、搾水の進行状況に応じてプレス用のシリンダ2によるセメントモルタル成形品Aに対する加圧力を制御するために、例えばセンサーSからの信号によりモータMを駆動してポンプP3を回動し、前記切換弁29、通路27を経てオイルタンク30から前記シリンダ2の入力側2a2に油を送込むことにより油圧をかけてセメントモルタル成形品Aに加圧力をかけるようになっている。またセンサーSとしては圧力センサーが使用される。
【0024】
本発明の一実施例は以上の構成からなり、以下関連発明である方法発明の一例を作用とともに工程順に説明する。
先ず第1工程として下型14に対してその外周の型枠15を上昇させた状態で、シリンダ20を駆動することにより、原料Gとしてのセメントモルタルを下型14と型枠15とによる凹部内に投入する。
【0025】
次いでパイロット弁24が開かれてオイルタンク22から油をプレス用のシリンダ2の入力側2a1 に移送することにより、シリンダ2を駆動して上型1を下型14に対して降下し、上型1と、下型14と、該下型14の外周に摺動可能に設けた型枠15とにより原料Gが圧縮されるような成形空間部18を形成する。
【0026】
而して真空ポンプP1 ,P2 を駆動し、上型1の下面および下型14の上面に設けた第1、第2の通水・通気手段6,6′の脱水布7と金網8、さらには上型1の下面および下型14の上面に設けた通孔9,9′とを通じて加圧時に原料Gから押出される水分は、真空ポンプP1 ,P2 によって上下から真空吸引孔5,5′により吸引されて搾水が行われる。
【0027】
このような搾水とともに原料G中に含まれる空気も上型1と下型14との成形面1a,14aに設けた通孔9,9′を通して吸引手段による吸引により搾り取られ、原料G中に空気が残存するのが防止される。従ってセメントモルタル成形品Aの表面にタイル模様等の如き凹凸部を有する複雑な模様や緻密な模様を形成する場合に構造的に堅牢になり、表面が綺麗に仕上がる。
【0028】
しかも通孔9,9′を臨む上型1と下型14との成形面1a,14aには脱水布7を有する第1および第2の通水・通気手段6,6′が設けられているので、セメントモルタルが成形空間部18内から流れ出すのを防止できるとともに後記のように上型1または下型14からの離型が容易且つ確実になり、セメントモルタル成形品Aはその表面にカケ等がない綺麗な仕上がり面になる。
【0029】
この際、成形空間部18の内圧力は、セメントモルタル成形品Aを形成すべき原料Gに応じて真空ポンプP1 ,P2 の吸引を大気圧から低真空、さらには高真空までの範囲において経時に調整されるが、上型1と下型14とによるプレス用のシリンダ2の油圧による原料Gへの加圧力も成形空間部18の内圧力の高低の変化による原料Gからの搾水状況の変化に応じて制御される。
【0030】
そして、プレス用のシリンダ2の原料Gに対する加圧力は、成形空間部18内の内圧力が大気圧に近いか、または低真空であって搾水当初である場合には、搾水工程が進行された高真空である場合に較べて高圧力にて原料Gに圧力をかけることになる。また搾水工程が進行して成形空間部18内の内圧力が高真空である場合には、そのピストン3が降下する際の抵抗がなくなり、加圧用シリンダ2の駆動を停止してもピストン3および上型1等の自重によって上型1は下型14に向かって自然に降下するので、それほど大きなプレス用のシリンダ3からの加圧力を加えなくても原料Gとしてのセメントモルタルを充分に加圧してセメントモルタル成形品Aを形成することができる。
【0031】
すなわち、上型1と下型14とに接続した真空ポンプP1 ,P2 を駆動して成形空間部18の内圧力が真空になり、上型1の下面の通孔9と、下型14の上面の通孔9′とを通じて搾水が行われる初期の搾水工程時には、パイロット弁24が開かれてオイルタンク22からの油がシリンダ2の入力側2a1 に供給されることにより、ピストン3が駆動し、上型1が下型14に向かって移動して原料Gを加圧し、成形がなされる。
しかながら原料Gからの搾水と、上型1と下型14とによる原料Gへの加圧がある程度進行すると、シリンダ2のピストン3の自重および大気圧による今までの一定の加圧力ではもはやそれ以上の原料Gの加圧も進行しなくなる。それ故、搾水にも時間がかかり、非能率的である。
【0032】
従って成形空間部18の内圧力が所定圧になると、センサーSがその圧力を検知し、その信号により切換弁29の油圧通路の方向が切換わるので、オイルタンク30内の油はポンプP3 に吸引され、切換弁29を介してシリンダ2の入力側2a2 に油が移送されることにより、ピストン3への加圧力は増強され、原料Gへの加圧力が増大されて圧縮が効率的に行われる。そして上型1と下型14とによって原料Gから水が押出されて搾水が効率良く行われる。
しかもセンサーSによる検知からのシリンダ2の駆動時間はタイマーによる設定時間を加減して長短調整できる。
【0033】
例えば具体的に屋根瓦をセメントモルタルを圧縮して成形する場合には、先ず成形材料を下型1に載せ、プレス用のシリンダ2を駆動し、上型1と型枠5を接触させて真空ポンプ等の吸引により成形空間部18の空気を排出すると同時に大気圧により加圧する。そして成形空間部18内の内圧力が略2cm/Hg 程度になり、シリンダ2の圧力によっては搾水がそれ以上、顕著に進行しなくなる場合には、それをセンサーSによって検知してモータMを駆動し、ポンプP3 を回動する。そして切換弁29を介してシリンダ2の入力側2a2 に油圧タンク30から油を移送し、ピストン3にて圧縮力が20〜100kg/cm2程度に増加され、原料Gとしてのセメントモルタルをおよそ3〜20秒程度、加圧して搾水を続け、セメントモルタル成形品Aとしての屋根瓦を成形する。
こうして原料Gにセメントモルタルを使用して屋根瓦を加圧して成形する場合に、図4に示す従来の装置に較べて搾水工程として全体的におよそ10〜15秒ほどに時間が短縮される。
【0034】
そして原料Gへの所望の加圧と搾水とが行われると、型枠用のシリンダ16が駆動して型枠15が下型14から降下し、次いで切換弁29の油圧通路の方向が切換わることによりポンプP3 にてオイルタンク30から油がシリンダ2の出力側2bに供給され、入力側2a2 からは油が排出されることにより、ピストン3は上昇し、セメントモルタル成形品Aの離型が行われる。
この際、上型1と下型14との通孔9,9′を臨む成形面1a,14aには、脱水布7を金網8と重合した通水・通気手段6,6′が設けられているので、セメントモルタル成形品Aは下型14の通孔9′から圧縮空気を僅かな量、吹き出す等することもあって下型14に対する離型が容易且つ確実に行なえる。
【0035】
その後、移送用のシリンダ10が縮むことにより上型1にセメントモルタル成形品Aは吸着されたままで受台12まで水平方向に搬送され、離型が終わる。
この際、真空ポンプP2 の駆動は停止されて下型14によるセメントモルタル成形品Aへの吸引は止み、上型1によるセメントモルタル成形品Aによる吸着と運搬とが速やかに行われるようになっている。
【0036】
上記実施例においては上型1が下型14に向かって移動する形式のものを代表的な実施例として説明したが、反対に下型14が上型1に対して移動するものでも良い。また上記実施例とは異なり下型14に対して型枠15が上下動するものに代えて上型1に対して型枠15が上下動するもので金型を形成してもよい。さらには上型1と下型14との成形面の双方に多数の通孔9,9′および通水・通気手段6,6′を設ける必要はなく、上型1または下型14の何れか一方の成形面に通孔と通水・通気手段とを設けるものであっても本発明の範囲である。
【0037】
なお上記実施例においては上型1と下型14との加圧により真空吸引孔5,5に連通する通孔から搾水する場合を説明したが、必ずしも通孔9,9′は搾水することに使用するのに限らず、加圧成形後にセメントモルタル成形品Aを吸着し、搬送する場合に使用することもできる。
【0038】
【発明の効果】
以上のように本発明の請求項1では、一方が他方に対して対向して移動可能に設けた上型および下型と、該上型または下型の何れかの外周に摺動可能に設けた型枠と、で囲まれ原料の成形空間部を有する金型が設けられ、前記上型または下型の成形面の少なくとも一方に多数の通孔設けられ、かつ、前記通孔が吸引手段に接続されたセメントモルタル成形品の成形装置において、前記通孔を臨む上型または下型の成形面の全面に前記通孔を覆う脱水布と金網とを重合した通水・通気手段けられ原料の加圧時に前記成形空間部の内圧力を検知する検知手段が設けられ、前記通孔を通じて前記吸引手段により吸引されて前記成形空間部内の内圧力が大気圧に近いか、または、低真空になっている搾水当初では、前記金型内の原料を大気圧により加圧し、そして、前記原料に対する搾水が進行して前記成形空間部の内圧力が高真空の所定圧になるのを前記検知手段が検知すると、該検知手段からの信号により、前記金型内の原料に対する加圧力を増強して前記大気圧より高くするように、制御しながら加圧成形するのと、また、請求項2では、上型または下型の一方を他方に移動し、その後前記上型または下型の何れかの外周に設けた型枠を摺動させて原料を金型の成形空間部内に投入することによりセメントモルタル成形品を加圧成形する方法において、原料の加圧時に、前記上型または前記下型の成形面の少なくとも一方に設けた多数の通孔を臨む前記上型または前記下型の成形面の全面に前記通孔を覆う脱水布と金網とを重合した通水・通気手段を介して吸引手段により前記成形空間部内を吸引しながら、前記成形空間部内の内圧力が大気圧に近いか、または、低真空になっている搾水当初では、前記金型内の原料を大気圧により加圧し、そして、前記原料に対する搾水が進行して前記成形空間部の内圧力が高真空の所定圧になるのを検知手段が検知すると、前記検知手段からの信号により、前記金型内の原料に対する加圧力を増強して前記大気圧より高くするように、制御しながらセメントモルタル成型品を加圧成形するので、原料に対する搾水の進行状況に伴って原料に対する上型と下型とによる加圧成形力を大気圧に近いか、または低真空圧から高真空圧へと、高低制御して全体的に搾水時間や脱気時間を制御できるため、経済的で効率的な加圧成形を行うことができる。また、加圧成形後は吸引手段の吸着により金型の前記成形面にセメントモルタル成形品を吸着して加圧成形位置から運搬を行うことができ、さらには原料の加圧成形後には通水・通気手段を介して前記通孔から圧縮気体をセメントモル成形品に吹き出すことによりセメントモルタル成形品の離型を容易かつ迅速に行うことができ、セメントモルタル成形品を金型への原料投入から、搾水、吸引、加圧成形、成形後の運搬、離型等の各工程を連続して一貫して効率的に成型することができる。
【0039】
またセメントモルタル成形品の離型が容易且つ確実に行なえるとともに内部に空気が残留せずに綺麗な仕上がり面にて構造堅牢なセメントモルタル成形品が形成され、製品の歩留りは良くなる。
【図面の簡単な説明】
【図1】本発明の一実施例を示す断面図である。
【図2】同じくセメントモルタル成形品を移送する場合の断面図である。
【図3】同じくセメントモルタル成形品を受台上に載置した状態を示す断面図である。
【図4】従来のセメントモルタル成形品の成形装置の一例を示す断面図である。
【図5】同じく表面に凹凸部を有するセメントモルタル成形品を成形する場合の一例を示す説明的な断面図である。
【符号の説明】
1 上型
1a 成形面
2 シリンダ
3 ピストン
5 真空吸引孔
5′ 真空吸引孔
6 通水・通気手段
6′ 通水・通気手段
9 通孔
9′ 通孔
14 下型
15 型枠
18 成形空間部
A セメントモルタル成形品
G 原料
1 真空ポンプ
2 真空ポンプ
[0001]
[Industrial application fields]
The present invention relates to a molding apparatus and method for molding a cement mortar molded product, and is optimally used for, for example, pressure molding cement mortar molded products used for roof tiles, outer wall panels, inner wall panels and civil engineering materials used for building materials. Is done.
[0002]
[Prior art]
Conventionally, there has been a molding apparatus shown in FIG. 4, for example, for compressing and squeezing cement mortar molded products such as roof tiles, outer wall panels of buildings, and inner wall panels.
That is, a plurality of water squeezing holes 9 ″ connected to suction means such as a vacuum pump P ′ are provided on the molding surface 1 a of the lower surface of the upper mold 1 facing the lower mold 14, and the first cylinder 2 for pressing is used. An upper mold 1 provided so as to be movable in the vertical direction with respect to the lower mold 14 and movable in the horizontal direction by the second cylinder 10 for transfer, and a third for forming a mold on the outer periphery of the lower mold 14. This is a structure in which a mold is formed with a mold 15 slidably provided in the cylinder 16 and a raw material charging plate 19 that can be moved by a fourth cylinder 20 is provided.
[0003]
In order to pressure-mold the cement mortar molded product, first, the cylinder 20 is driven to move the raw material charging plate 19 so that the inside of the molding space 18 surrounded by the lower mold 14 and the mold 15 is formed. The raw material G for cement mortar is put into Next, by driving the press cylinder 2, the upper die 1 is moved downward with respect to the lower die 14, and the raw material G charged into the molding space 18 is pressurized and molded. At this time, the inside of the molding space 18 surrounded by the lower mold 14, the mold 15, and the upper mold 1 is sucked by the suction means, and the raw material G is pressurized while being in a vacuum state by reducing the pressure, and the water extraction hole 9. The water is squeezed through to form a cement mortar molded product A ′ as a pressure molded product.
[0004]
Thereafter, the upper die 1 is raised with respect to the lower die 14 by driving the first cylinder 2 for pressing, and then the cylinder 16 is driven to lower the mold 15 with respect to the lower die 14. Then, by driving the transfer cylinder 10, the cement mortar molded product A ′ is transferred in the horizontal direction while being sucked by the upper mold 1 by the suction means, and then placed on the receiving tray 12. The cement mortar molded product A ′ is transported and released.
[0005]
FIG. 5 shows that a cement mortar molded product A ′ molded by pressurization of the upper mold 1 and the lower mold 14 is formed on the surface by providing an uneven portion 1 b on the molding surface 1 a below the upper mold 1. This is a case where an outer wall panel or the like as a building material in which a complicated pattern such as a pattern is formed is pressure-molded.
[0006]
[Problems to be solved by the invention]
However, when the cement mortar molded product A ′ is subjected to pressure molding in the conventional cement mortar molded product molding apparatus shown in FIG. 4, a molding space surrounded by the upper mold 1, the lower mold 14, and the mold 15. 18, regardless of the progress of pressurization of the raw material G by the press cylinder 2, the raw material G is pressurized by the upper mold 1 and the lower mold 14 until the mold is released from the beginning. The water is squeezed from the raw material G through the vacuum suction hole 5 by uniformly reducing the pressure by the suction means to be high vacuum.
Therefore, at the beginning of the pressure molding in which the raw material G contains a sufficient amount of water, the water is squeezed by a large amount at once, but when the pressure on the raw material G proceeds to some extent, Squeezing becomes slow and the amount of squeezing is also small.
In addition, the press cylinder 2 is operated at a high pressure uniformly from the beginning of pressurization of the upper mold 1 and the lower mold 14 to the end of pressurization, which is uneconomical.
[0007]
In the molding apparatus shown in FIG. 4, when the cement mortar molded product A ′ is pressure-molded by the upper mold 1 and the lower mold 14, the cement mortar is formed on the molding surfaces 1 a and 14 a of the upper mold 1 and the lower mold 14. Therefore, the cement mortar molded product A ′ is not easily and reliably released from the upper mold 1 or the lower mold 14 at the time of mold release. Therefore, the cement mortar molded product A ′ was not formed on a beautiful finished surface and was difficult to mold.
[0008]
Moreover, since the air contained in the raw material G remains in the cement mortar molded product A ′ during pressurization by the upper mold 1 and the lower mold 14, the cement mortar molded product A ′ is structurally fragile, The product was not molded into a fragile and easy-to-break surface.
In particular, when the pattern formed on the surface of cement mortar molded product A 'is a complex and dense pattern such as a tile pattern, such as an outer wall panel used for building materials, the cement mortar molded product during pressurization Air tends to remain inside the irregularities on the surface of A ', and it should become a tile pattern. When the irregular surface of the surface is released, it is crushed by the residual air, and the finished surface is cement mortar. Product A 'could not be molded.
[0009]
Therefore, the present invention considers the actual situation of raw material extraction, pressurizing according to its progress, and overall shortening the extraction time and deaeration time, economical and efficient The purpose is to improve the product yield by performing pressure molding and releasing the cement mortar molded product easily and reliably and forming a solid structure with a clean finish without air remaining inside. And
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the invention according to claim 1 is characterized in that an upper mold and a lower mold , one of which is movable to face the other, and the upper mold or the lower mold. periphery slidably disposed formwork, in a mold having a molding space of the enclosed material is provided, the upper mold or the lower mold plurality of through holes in at least one of the molding surface of the is provided a and, in the molding apparatus of cement mortar molded article wherein the through hole is connected to the suction means,
(B) said holes passing water-vent obtained by polymerizing a dewatering fabric with a wire mesh that covers the hole on the entire surface of the molding surface of the upper mold or the lower mold facing the is set vignetting,
(B) A detection means for detecting the internal pressure of the molding space when a raw material is pressurized is provided,
(C) At the beginning of squeezing when the internal pressure in the molding space portion is sucked by the suction means through the through hole and is close to atmospheric pressure or is in a low vacuum, the raw material in the mold is taken to atmospheric pressure. And pressurizing with
(D) When the detection means detects that the water is squeezed against the raw material and the internal pressure of the molding space reaches a predetermined high vacuum, the raw material in the mold is detected by a signal from the detection means. The pressure molding is performed while controlling so that the pressure applied to the pressure is increased to be higher than the atmospheric pressure .
[0011]
The invention of claim 2 of the present invention is to move one of the upper mold or the lower mold to the other, then the gold raw material by sliding mold which is provided on one of the outer periphery of the upper die or the lower die In a method of pressure-molding a cement mortar molded product by putting it into the molding space of the mold ,
(A) Dehydration of covering the through-holes over the entire molding surface of the upper mold or the lower mold facing many through-holes provided on at least one of the molding surfaces of the upper mold or the lower mold when the raw material is pressurized While the inside of the molding space is sucked by the suction means through the water / venting means obtained by polymerizing the cloth and the wire mesh, the internal pressure in the molding space is close to atmospheric pressure or low vacuum. At the beginning of water, the raw material in the mold is pressurized by atmospheric pressure, and
(B) When the detection means detects that the squeezing of the raw material has progressed and the internal pressure of the molding space becomes a predetermined high vacuum, the signal from the detection means is applied to the raw material in the mold. The cement mortar molded product is pressure-molded while being controlled so as to increase the applied pressure to be higher than the atmospheric pressure.
It is characterized by that.
[0012]
[Action]
At the time of pressure molding of the raw material by the upper mold and the lower mold, at least the internal pressure of the molding space surrounded by the upper mold, the lower mold, and the mold slidable in either the upper mold or the lower mold Depressurize through the through-holes provided on either the upper or lower mold surface, detect by adjusting means while adjusting, pressurize by controlling the pressure applied to the raw material by the upper mold and lower mold To do.
[0013]
【Example】
An embodiment of the present invention will be described below with reference to FIGS.
Reference numeral 1 denotes an upper die, and the upper die 1 is attached to the lower surface of an upper die attachment plate 4 provided at the lower end of a piston 3 that can be moved up and down in a high pressure press cylinder 2.
[0014]
5 is a first vacuum suction holes, the vacuum suction holes 5 are provided such that inside the upper die 1 communicates, is connected to a suction means such as vacuum pump P 1.
[0015]
Reference numeral 6 denotes a first water passage / venting means provided on the lower surface of the upper mold 1. The water passage / venting means 6 prevents the cement mortar as the raw material G from flowing out during pressurization and suction. The cement mortar molded product A is easily and reliably released from the mold without adhering to the upper mold 1 or the lower mold 14 at the time of molding, so that the dewatering cloth 7 and the wire mesh 8 polymerized on the dewatering cloth 7 are used. It is formed. The water passage / venting means 6 is communicated with the vacuum suction hole 5 through a number of first through holes 9 provided in the molding surface 1a on the lower surface of the upper mold 1, and is sucked by the suction means.
[0016]
Reference numeral 10 denotes a transfer cylinder in which a piston 11 is connected to the upper mold mounting plate 4. When the cylinder 10 is driven, the upper mold 1 becomes movable in a substantially horizontal direction, and cement mortar molding after pressure molding is performed. While adsorbing the product A, it moves to the cradle 12. The cradle 12 can be raised and lowered by a cradle cylinder 13.
[0017]
Reference numeral 14 denotes a lower mold provided below the upper mold 1, and the molding surface 14 a on the upper surface of the lower mold 14 is connected to the second vacuum suction hole 5 ′ through a plurality of second through holes 9 ′. They are communicated and sucked by a suction means such as a vacuum pump P2. Reference numeral 6 'denotes a second water / venting means having the same structure as the water / venting means 6. The water / venting means 6' is a molding surface of the upper surface of the lower mold 14 where the through hole 9 'faces. 14a.
[0018]
A mold 15 is provided on the outer periphery of the lower mold 14 so as to be slidable. The mold 15 can be moved up and down by a mold piston 17 which can be moved up and down in a cylinder 16 for the mold.
[0019]
Reference numeral 18 denotes a molding space surrounded by the upper mold 1, the lower mold 14, and the mold 15, and the raw material G is introduced into the molding space 18, so that the raw material G becomes the upper mold 1. And the lower mold 14 are pressed to form a cement mortar molded product A.
[0020]
Reference numeral 19 denotes a raw material charging plate, and this raw material charging plate 19 is driven by a cylinder 20 for charging cement mortar as the raw material G into the molding space 18.
[0021]
Examples of the raw material G include roof tiles, outer wall panels as building materials, inner wall panels, and cement mortar for forming blocks and foundations as civil engineering materials.
[0022]
Reference numeral 21 denotes a hydraulic circuit for moving the piston 3 of the cylinder 2 up and down. The hydraulic circuit 21 includes a pilot valve 24 provided in a passage 23 connected from the oil tank 22 to the input side 2a 1 of the cylinder 2, and This is formed by a check valve 26 provided in a passage 25 connected from the oil tank 22 to the output side 2 b of the cylinder 2.
The hydraulic circuit 21 further includes a switching valve 29 provided in passages 27 and 28 connected to the input side 2a 2 and the output side 2b of the cylinder 2, a pump P 3 connected to the switching valve 29, a pump And a motor M for driving P 3 .
An oil tank 30 is connected to the switching valve 29 and the pump P 3 .
[0023]
S is a detection means for detecting the internal pressure in the molding space 18 surrounded by the upper mold 1, the lower mold 14, and the mold 15 slidably provided on the outer periphery of the lower mold 14. a sensor, the sensor S is provided in the molding space 18, in order to control the pressure to cement mortar molded article a by the cylinder 2 for press according to the progress of dewatering, for instance from the sensor S The motor M is driven by the signal to rotate the pump P 3 , and the oil is supplied from the oil tank 30 to the input side 2 a 2 of the cylinder 2 through the switching valve 29 and the passage 27 to apply hydraulic pressure to the cement mortar. A pressure is applied to the molded product A. As the sensor S, a pressure sensor is used.
[0024]
An embodiment of the present invention has the above-described configuration, and an example of a method invention which is a related invention will be described in the order of steps together with actions.
First, as a first step, the cylinder 20 is driven in a state in which the outer mold 15 is raised with respect to the lower mold 14, so that cement mortar as the raw material G is placed in the recess formed by the lower mold 14 and the mold 15. In
[0025]
Next, the pilot valve 24 is opened and the oil is transferred from the oil tank 22 to the input side 2a 1 of the press cylinder 2 so that the cylinder 2 is driven to lower the upper mold 1 relative to the lower mold 14, and the upper A molding space 18 in which the raw material G is compressed is formed by the mold 1, the lower mold 14, and a mold 15 slidably provided on the outer periphery of the lower mold 14.
[0026]
Thus, the vacuum pumps P 1 and P 2 are driven, and the dewatering cloth 7 and the wire mesh 8 of the first and second water / air venting means 6 and 6 ′ provided on the lower surface of the upper mold 1 and the upper surface of the lower mold 14. Furthermore, the moisture extruded from the raw material G during pressurization through the through holes 9 and 9 'provided on the lower surface of the upper mold 1 and the upper surface of the lower mold 14 is vacuum suction holes from above and below by the vacuum pumps P 1 and P 2 . The water is drawn by being sucked by 5 and 5 '.
[0027]
The air contained in the raw material G together with the squeezed water is also squeezed out by suction by suction means through the through holes 9 and 9 ′ provided in the molding surfaces 1 a and 14 a of the upper mold 1 and the lower mold 14. Air is prevented from remaining. Accordingly, when a complicated pattern having a concavo-convex portion such as a tile pattern or a dense pattern is formed on the surface of the cement mortar molded product A, the structure becomes robust and the surface is finished finely.
[0028]
Moreover, on the molding surfaces 1a, 14a of the upper mold 1 and the lower mold 14 facing the through holes 9, 9 ', first and second water / venting means 6, 6' having a dewatering cloth 7 are provided. Therefore, it is possible to prevent the cement mortar from flowing out of the molding space 18, and the mold mortar molded product A can be easily removed from the upper mold 1 or the lower mold 14 as described later. There is no beautiful finish.
[0029]
At this time, the inner pressure of the molding space 18, a low vacuum suction of the vacuum pump P 1, P 2 from the atmospheric pressure according to the material G to be formed cement mortar moldings A, more in the range up to a high vacuum Although adjusted over time, the pressure applied to the raw material G by the hydraulic pressure of the press cylinder 2 by the upper die 1 and the lower die 14 is also reduced by the water pressure from the raw material G due to the change in the internal pressure of the molding space 18. It is controlled according to the change of.
[0030]
And the pressurizing force with respect to the raw material G of the cylinder 2 for press is that the internal pressure in the molding space 18 is close to the atmospheric pressure, or when the pressure is low and the water is initially drawn, the water drawing process proceeds. The raw material G is pressurized at a higher pressure than in the case of a high vacuum. Further, when the water-squeezing process proceeds and the internal pressure in the molding space 18 is high vacuum, there is no resistance when the piston 3 descends, and the piston 3 can be stopped even if the driving of the pressurizing cylinder 2 is stopped. Since the upper die 1 naturally descends toward the lower die 14 due to its own weight, etc., the cement mortar as the raw material G is sufficiently applied without applying a large pressing force from the press cylinder 3. The cement mortar molded product A can be formed by pressing.
[0031]
That is, the vacuum pumps P 1 and P 2 connected to the upper mold 1 and the lower mold 14 are driven, and the internal pressure of the molding space 18 becomes vacuum, and the through hole 9 on the lower surface of the upper mold 1 and the lower mold 14 In the initial water-squeezing process in which water is squeezed through the upper surface through-hole 9 ', the pilot valve 24 is opened and the oil from the oil tank 22 is supplied to the input side 2a 1 of the cylinder 2, whereby the piston 3 is driven, the upper die 1 moves toward the lower die 14 to pressurize the raw material G, and molding is performed.
However, when the water from the raw material G and the pressurization of the raw material G by the upper die 1 and the lower die 14 are progressed to some extent, the weight of the piston 3 of the cylinder 2 and the constant pressure up to now due to atmospheric pressure are no longer required. Further pressurization of the raw material G does not proceed. Therefore, squeezing takes time and is inefficient.
[0032]
Therefore, when the internal pressure of the molding space 18 becomes a predetermined pressure, the sensor S detects the pressure, and the direction of the hydraulic passage of the switching valve 29 is switched by the signal, so that the oil in the oil tank 30 is sent to the pump P 3 . is sucked by the oil is transferred to the input side 2a 2 of the cylinder 2 via the switching valve 29, pressure applied to the piston 3 is enhanced, the compression pressure applied to the raw material G is increased efficiently Done. And water is extruded from the raw material G by the upper mold | type 1 and the lower mold | type 14, and squeezing is performed efficiently.
Moreover, the driving time of the cylinder 2 from the detection by the sensor S can be adjusted in length by adjusting the time set by the timer.
[0033]
For example, when concretely molding a roof tile by compressing cement mortar, first, the molding material is placed on the lower mold 1, the pressing cylinder 2 is driven, and the upper mold 1 and the formwork 5 are brought into contact with each other to form a vacuum. The air in the molding space 18 is discharged by suction with a pump or the like and simultaneously pressurized with atmospheric pressure. If the internal pressure in the molding space 18 becomes about 2 cm / Hg and the squeezing does not progress further depending on the pressure of the cylinder 2, it is detected by the sensor S and the motor M is turned on. driven, it rotates the pump P 3. Then, oil is transferred from the hydraulic tank 30 to the input side 2a 2 of the cylinder 2 via the switching valve 29, and the compression force is increased to about 20 to 100 kg / cm 2 by the piston 3, so that the cement mortar as the raw material G is approximately Pressurization is continued for about 3 to 20 seconds, and the squeezing is continued to form a roof tile as a cement mortar molded product A.
In this way, when cement mortar is used as the raw material G and the roof tile is pressed and molded, the entire time is shortened to about 10 to 15 seconds as a squeezing process as compared with the conventional apparatus shown in FIG. .
[0034]
When the desired pressurization and squeezing of the raw material G are performed, the mold cylinder 16 is driven to lower the mold 15 from the lower mold 14, and then the direction of the hydraulic passage of the switching valve 29 is cut off. from the oil tank 30 by the pump P 3 by the switched oil is supplied to the output side 2b of the cylinder 2, by which the oil is discharged from the input side 2a 2, the piston 3 rises and cement mortar molded article a Mold release is performed.
At this time, the molding surfaces 1a and 14a facing the through holes 9 and 9 'of the upper mold 1 and the lower mold 14 are provided with water / ventilating means 6 and 6' in which the dewatering cloth 7 is superposed on the metal mesh 8. Therefore, the cement mortar molded product A can be easily and reliably released from the lower die 14 because a small amount of compressed air is blown out from the through-holes 9 ′ of the lower die 14.
[0035]
Thereafter, when the transfer cylinder 10 is contracted, the cement mortar molded product A is transported in the horizontal direction to the cradle 12 while being adsorbed to the upper mold 1, and the mold release is completed.
At this time, the driving of the vacuum pump P 2 is stopped, the suction to the cement mortar molded product A by the lower mold 14 is stopped, and the adsorption and transportation by the cement mortar molded product A by the upper mold 1 are performed quickly. ing.
[0036]
In the above embodiment, the type in which the upper mold 1 moves toward the lower mold 14 has been described as a representative example, but the lower mold 14 may move relative to the upper mold 1. Unlike the above embodiment, the mold may be formed by moving the mold 15 up and down relative to the upper mold 1 instead of moving the mold 15 up and down relative to the lower mold 14. Furthermore, it is not necessary to provide a large number of through holes 9, 9 'and water / venting means 6, 6' on both molding surfaces of the upper mold 1 and the lower mold 14, and either the upper mold 1 or the lower mold 14 is provided. It is within the scope of the present invention to provide a through hole and water / ventilating means on one molding surface.
[0037]
In the above embodiment, the case where water is squeezed from the through holes communicating with the vacuum suction holes 5 and 5 by pressurization of the upper mold 1 and the lower mold 14 has been described, but the through holes 9 and 9 'are necessarily squeezed. In particular, the present invention is not limited to use, and the cement mortar molded product A can be adsorbed and conveyed after pressure molding.
[0038]
【The invention's effect】
As described above, in claim 1 of the present invention , the upper mold and the lower mold, one of which is slidable with respect to the other, and the outer periphery of either the upper mold or the lower mold are slidably provided. and a mold, in being surrounded by mold provided with a molding space portion of the raw material, a large number of through holes in at least one of the molding surface of the upper mold or the lower mold is provided, and said through hole is sucked in the molding apparatus of cement mortar moldings connected to the means, the upper mold or the lower mold of the entire surface of the molding surface covers said hole dehydration cloth and wire net and polymerized water passing breathable means is set facing the hole vignetting detection means for detecting the internal pressure of the molding space portion on the pressurization of the raw material is provided, or the inner pressure in the molding space portion is sucked by the suction means through the through hole is close to atmospheric pressure, or The raw material in the mold is the atmosphere Then, when the detection means detects that the squeezing of the raw material has progressed and the internal pressure of the molding space becomes a predetermined high vacuum, the mold receives a signal from the detection means. The pressure molding is performed while controlling so as to increase the pressurizing force on the raw material in the interior to be higher than the atmospheric pressure , and in claim 2, one of the upper mold and the lower mold is moved to the other, and then a method of pressure molding of cement mortar moldings by injecting mold was allowed to slide material provided on one of the outer periphery of the upper mold or the lower mold the molding space of the mold, the raw material pressurizing When pressure is applied, a dewatering cloth and a metal mesh covering the through hole are superposed on the entire molding surface of the upper mold or the lower mold facing a large number of through holes provided on at least one of the molding surfaces of the upper mold or the lower mold. By suction means through While sucking the inside of the molding space part, the internal pressure in the molding space part is close to atmospheric pressure, or at the beginning of squeezing which is in a low vacuum, the raw material in the mold is pressurized by atmospheric pressure, and Then, when the detection means detects that the squeezing of the raw material proceeds and the internal pressure of the molding space reaches a predetermined high vacuum, the pressure applied to the raw material in the mold is determined by a signal from the detection means. Since the cement mortar molded product is pressure-molded while being controlled so as to increase the pressure above the atmospheric pressure, the pressure molding force by the upper mold and the lower mold for the raw material according to the progress of squeezing of the raw material Can control the water extraction time and deaeration time as a whole by controlling the pressure from close to atmospheric pressure or from low vacuum pressure to high vacuum pressure. it can. In addition, after the pressure molding, the cement mortar molded product can be adsorbed to the molding surface of the mold by adsorption of the suction means and can be transported from the pressure molding position.・ By blowing compressed gas from the through hole through the ventilation means to the cement molar molded product, the cement mortar molded product can be easily and quickly released from the raw material input to the mold. Each process such as squeezing, suction, pressure molding, transport after molding, and mold release can be continuously and efficiently molded.
[0039]
In addition, the cement mortar molded product can be easily and reliably released, and air is not left in the interior, so that a solid structure cement mortar molded product is formed on a clean finish surface, and the yield of the product is improved.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of the present invention.
FIG. 2 is a cross-sectional view when a cement mortar molded product is transferred in the same manner.
FIG. 3 is a cross-sectional view showing a state in which a cement mortar molded product is similarly placed on a cradle.
FIG. 4 is a cross-sectional view showing an example of a molding apparatus for a conventional cement mortar molded product.
FIG. 5 is an explanatory cross-sectional view showing an example of molding a cement mortar molded product having an uneven portion on the surface.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Upper mold | type 1a Molding surface 2 Cylinder 3 Piston 5 Vacuum suction hole 5 'Vacuum suction hole 6 Water / venting means 6' Water / venting means 9 Through hole 9 'Through hole 14 Lower mold 15 Mold 18 Molding space A Cement mortar molding G Raw material P 1 Vacuum pump P 2 Vacuum pump

Claims (2)

一方が他方に対して対向して移動可能に設けた上型および下型と、該上型または下型の何れかの外周に摺動可能に設けた型枠と、で囲まれ原料の成形空間部を有する金型が設けられ、前記上型または下型の成形面の少なくとも一方に多数の通孔が設けられ、かつ、前記通孔が吸引手段に接続されたセメントモルタル成形品の成形装置において、
(イ)前記通孔を臨む上型または下型の成形面の全面に前記通孔を覆う脱水布と金網とを重合した通水・通気手段けられ
(ロ)原料の加圧時に前記成形空間部の内圧力を検知する検知手段が設けられ、
(ハ)前記通孔を通じて前記吸引手段により吸引されて前記成形空間部内の内圧力が大気圧に近いか、または、低真空になっている搾水当初では、前記金型内の原料を大気圧により加圧し、そして、
(ニ)前記原料に対する搾水が進行して前記成形空間部の内圧力が高真空の所定圧になるのを前記検知手段が検知すると、該検知手段からの信号により、前記金型内の原料に対する加圧力を増強して前記大気圧より高くするように、制御しながら加圧成形する
ことを特徴とするセメントモルタル成形品の成形装置。
Molding of a raw material surrounded by an upper mold and a lower mold, one of which is movable so as to be opposed to the other, and a mold slidably provided on the outer periphery of either the upper mold or the lower mold mold is provided having a space portion, a large number of through holes are provided on at least one of the molding surface of the upper mold or the lower mold, and the hole is connected cement mortar moldings of the forming apparatus to the suction means In
(B) said holes passing water-vent obtained by polymerizing a dewatering fabric with a wire mesh that covers the hole on the entire surface of the molding surface of the upper mold or the lower mold facing the is set vignetting,
(B) A detection means for detecting the internal pressure of the molding space when a raw material is pressurized is provided,
(C) At the beginning of squeezing when the internal pressure in the molding space portion is sucked by the suction means through the through hole and is close to atmospheric pressure or is in a low vacuum, the raw material in the mold is taken to atmospheric pressure. And pressurizing with
(D) When the detection means detects that the water is squeezed against the raw material and the internal pressure of the molding space reaches a predetermined high vacuum, the raw material in the mold is detected by a signal from the detection means. An apparatus for molding a cement mortar molded product, wherein pressure molding is performed while controlling so as to increase the pressure applied to the pressure to be higher than the atmospheric pressure .
上型または下型の一方を他方に移動し、その後前記上型または下型の何れかの外周に設けた型枠を摺動させて原料を金型の成形空間部内に投入することによりセメントモルタル成形品を加圧成形する方法において、
(a)原料の加圧時に、前記上型または前記下型の成形面の少なくとも一方に設けた多数の通孔を臨む前記上型または前記下型の成形面の全面に前記通孔を覆う脱水布と金網とを重合した通水・通気手段を介して吸引手段により前記成形空間部内を吸引しながら、前記成形空間部内の内圧力が大気圧に近いか、または、低真空になっている搾水当初では、前記金型内の原料を大気圧により加圧し、そして、
(b)前記原料に対する搾水が進行して前記成形空間部の内圧力が高真空の所定圧になるのを検知手段が検知すると、前記検知手段からの信号により、前記金型内の原料に対する加圧力を増強して前記大気圧より高くするように、制御しながらセメントモルタル成型品を加圧成形する、
ことを特徴とするセメントモルタル成形品の成形方法。
Move one of the upper mold or the lower mold to the other, then cement by injecting the upper mold or sliding the lower die mold provided on one of the outer periphery of the raw material into the molding space of the mold In the method of pressure molding a mortar molded product,
(A) Dehydration of covering the through-holes over the entire molding surface of the upper mold or the lower mold facing many through-holes provided on at least one of the molding surfaces of the upper mold or the lower mold when the raw material is pressurized While the inside of the molding space is sucked by the suction means through the water flow / ventilation means obtained by polymerizing the cloth and the wire mesh, the internal pressure in the molding space is close to atmospheric pressure or low vacuum. At the beginning of water, the raw material in the mold is pressurized by atmospheric pressure, and
(B) When the detection means detects that the squeezing of the raw material has progressed and the internal pressure of the molding space becomes a predetermined high vacuum, the signal from the detection means is applied to the raw material in the mold. The cement mortar molded product is pressure-molded while being controlled so as to increase the applied pressure to be higher than the atmospheric pressure.
A method for molding a cement mortar molded product, characterized in that:
JP32721893A 1993-12-24 1993-12-24 Cement mortar molding apparatus and molding method thereof Expired - Fee Related JP4119493B2 (en)

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