JP2005021944A - Casting method and casting line - Google Patents

Casting method and casting line Download PDF

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Publication number
JP2005021944A
JP2005021944A JP2003190384A JP2003190384A JP2005021944A JP 2005021944 A JP2005021944 A JP 2005021944A JP 2003190384 A JP2003190384 A JP 2003190384A JP 2003190384 A JP2003190384 A JP 2003190384A JP 2005021944 A JP2005021944 A JP 2005021944A
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JP
Japan
Prior art keywords
mold
casting
molding
frame
foundry sand
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
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JP2003190384A
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Japanese (ja)
Inventor
Hiroaki Nakai
宏明 中井
Satomi Kanehira
諭三 金平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Metal Engineering KK
Nippon Eirich Co Ltd
Original Assignee
Metal Engineering KK
Nippon Eirich Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Metal Engineering KK, Nippon Eirich Co Ltd filed Critical Metal Engineering KK
Priority to JP2003190384A priority Critical patent/JP2005021944A/en
Publication of JP2005021944A publication Critical patent/JP2005021944A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To suitably blend the necessary amount of a supplemental component into molding sand separated from a cast product from one or a little fixed number of already known kinds of molds at a low cost, in a closed loop-state casting line. <P>SOLUTION: A molding flask is circulated with a closed loop state molding flask circulating device and the empty molding flask is conveyed into a molding device at a molding stop position and the mold is shaped, and at a molten metal pouring stop position, the molten metal is poured into the mold and the mold already poured with the molten metal is cooled during conveying to the cooling stop position. The mold is conveyed into a mold shake-out device at a molding flask shaking-out stop position and shaken out, and the empty molding flask is returned back into the molding flask circulating device. The cast product is separated from the shaking-out one or few fixed number of known kinds of the molds, and the molding sand is recovered. The necessary amount of supplemental component is blended into this recovered molding sand, and the molding sand blended with the supplemental component is kneaded with a kneader while adjusting the water amount and this kneaded molding sand is conveyed into the molding device and charged into the molding flask, and the mold is shaped. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、鋳物製品を鋳造する方法およびその方法を実施する鋳造ラインに関するものである。
【0002】
【従来の技術】
従来、造型装置において上型および下型からなる1個の鋳型を造型するのに必要な分量の鋳物砂および補充成分を混練機に投入し、混練機で混練して混練鋳物砂を製造し、該1鋳型分の混練砂を搬送装置によって造型装置の砂貯蔵ホッパに搬送する造型装置への混練砂の供給装置が特許文献1に記載されている。
【0003】
【特許文献1】
特開2002−66688号公報(第2頁、図1)
【0004】
【発明が解決しようとする課題】
しかしながら、特許文献1に記載された造型装置への混練砂の供給装置では、混練機に投入される鋳物砂の成分割合を一定にするために、混練機に投入される鋳物砂を大量に用意し、鋳物砂に補充する成分および分量を特定しておく必要があった。このために、常に大量の鋳物砂を貯溜する必要があり、手間とスペースが必要でコスト高になる。
【0005】
本発明は、係る従来の不具合を解消するためになされたもので、閉ループ状の鋳造ラインにおいて、1個または少数一定個数の既知種類の鋳型から鋳物製品を分離した鋳物砂に必要量の補充成分を低コストで適切に配合することである。
【0006】
【課題を解決するための手段と作用および発明の効果】
上記の課題を解決するため、請求項1に記載の発明の構成上の特徴は、複数の鋳枠を閉ループ状の鋳枠循環装置により複数の停止位置に搬送し、造型停止位置に搬送された空の鋳枠を造型装置に搬入し鋳物砂を投入して鋳型を造型し該鋳型を前記鋳枠循環装置に戻し、前記鋳型に注湯停止位置で注湯し、注湯後冷却停止位置を経由して枠ばらし停止位置に搬送された鋳型を枠ばらしすることを繰り返す鋳造方法において、前記枠ばらしされた鋳型から鋳物製品を分離された鋳物砂を鋳枠毎に分離回収し、他の鋳枠から枠ばらしされた鋳型から分離回収された鋳物砂と混合することなく必要量の補充成分を配合して混練することである。
【0007】
本発明では、鋳枠は閉ループ状の鋳枠循環装置によって循環され、空の鋳枠が造型停止位置で造型装置に搬入されて鋳型造型され、注湯停止位置で鋳型に注湯され、注湯済み鋳型は冷却停止位置を搬送される間に冷却される。鋳型は枠ばらし停止位置で枠ばらし装置により枠ばらしされる。枠ばらしされた鋳型から鋳物製品を分離された鋳物砂が鋳枠毎に分離回収される。この鋳枠毎に分離回収された鋳物砂が、他の鋳枠から枠ばらしされた鋳型から分離回収された鋳物砂と混合することなく、必要量の補充成分が配合されて混練される。これにより、大量の鋳物砂を貯溜する貯蔵槽が不要となり、設置面積、コストを低減することができる。そして、鋳枠毎に分離回収された鋳物砂に必要量の補充成分を配合して混練し鋳型造型工程で使用するので、混練した直後の最適な組成状態の鋳物砂で鋳型造型することができる。
【0008】
請求項2に記載の発明の構成上の特徴は、複数の鋳枠を閉ループ状の鋳枠循環装置により複数の停止位置に搬送し、造型停止位置に搬送された空の鋳枠を造型装置に搬入し鋳物砂を投入して鋳型を造型し該鋳型を前記鋳枠循環装置に戻し、前記鋳型に注湯停止位置で注湯し、注湯後冷却停止位置を経由して枠ばらし停止位置に搬送された鋳型を枠ばらしすることを繰り返す鋳造方法において、前記枠ばらしされた1個または少数一定個数の既知種類の鋳型から鋳物製品を分離された回収鋳物砂に必要量の補充成分を配合する配合工程と、該補充成分を配合された鋳物砂を混練機で水分調整しながら混練する工程と、該混練された混練鋳物砂を前記造型装置において前記空の鋳枠内に投入する工程と、を備えたことである。
【0009】
本発明では、鋳枠は閉ループ状の鋳枠循環装置によって循環され、空の鋳枠が造型停止位置で造型装置に搬入されて鋳型造型され、注湯停止位置で鋳型に注湯され、注湯済み鋳型は冷却停止位置を搬送される間に冷却される。鋳型は枠ばらし停止位置で枠ばらし装置に搬入されて枠ばらしされる。枠ばらしされた1個または少数一定個数の既知種類の鋳型から鋳物製品が分離されて鋳物砂が回収される。この回収鋳物砂に必要量の補充成分が配合される。補充成分が配合された鋳物砂は混練機で水分調整しながら混練され、該混練鋳物砂は造型装置に搬送され鋳枠内に投入されて鋳型造型される。
【0010】
本発明によれば、枠ばらしされた1個または少数一定個数の既知種類の鋳型から鋳物製品が分離された回収鋳物砂に必要量の補充成分を配合するので、回収鋳物砂に配合すべき補充成分および配合量を枠ばらしされた鋳型の種類に応じて設定し適正に配合することができ、従来のように大量の鋳物砂を保留する必要がなくなり、ストックスペースおよび費用を削減することができる。そして鋳型造型工程で使用される鋳物砂を少量ずつ混練するので、混練鋳物砂を混練してすぐに最適な組成状態で鋳型造型工程に供給して鋳型造型することができる。
【0011】
また、混練、鋳型造型、枠ばらしの各工程の作動と関連付けて運転される長い搬送装置が不要となり、混練、鋳型造型、注湯、枠ばらしの各工程を独立して行うことが可能となり、各工程に係る装置を夫々の製造工場において単独で試運転して調整することができ、設備の設置場所での据付作業、費用および設置スペースを削減することができる。また、各工程が独立しているので、生産形態に合わせた設備の追加省略、生産工場の変更による移転が容易となり、日常のメンテナンスにおいても、各行程に係る装置の回りにスペースを確保することができ作業が容易になる。このように、回収した鋳物砂を順次成分補充して混練し鋳型造型に直ちに使用できるので、混練鋳物砂が時間経過によって組成劣化をきたすことがなく、また設備の製作、据付、変更、メンテナンスにおいて、時間と費用を大幅に削減することができる。
【0012】
請求項3に係る発明の構成上の特徴は、請求項2において、前記配合工程は、前記回収鋳物砂の単位量当たりに配合すべき補充成分および配合量を鋳型の種類別に記憶手段に記憶する工程と、前記配合工程に搬送された回収鋳物砂に配合すべき前記補充成分および配合量を前記記憶手段に鋳型の種類別に記憶された回収鋳物砂の単位量当たりに配合すべき補充成分および配合量に基づいて求める工程と、を備えたことである。
【0013】
本発明では、回収鋳物砂の単位量当たりに配合すべき補充成分および配合量を鋳型の種類別に記憶手段に記憶しておく。枠ばらしされた鋳型から鋳物製品が分離されて回収された回収鋳物砂に配合すべき補充成分および配合量が、記憶手段に鋳型の種類別に記憶された回収鋳物砂の単位量当たりに配合すべき補充成分および配合量に基づいて求められるので、回収鋳物砂に配合すべき補充成分および配合量を簡単な方法で迅速かつ正確に決定することができる。さらに、記憶手段に鋳型の種類別に記憶された回収鋳物砂の単位量当たりに配合すべき補充成分および配合量を実績をフィードバックしてより適切なものにすることができる。
【0014】
請求項4に係る発明の構成上の特徴は、請求項2または3において、前記配合工程は、1個の既知種類の鋳型から鋳物製品を分離された回収鋳物砂に必要量の補充成分を配合し、前記混練機によって混練された一鋳型分の混練砂であって前記造型装置において該一鋳型用の鋳枠内に投入されなかった余剰混練鋳物砂の全量を注湯後に該一鋳型用の鋳物砂と混合することである。
【0015】
本発明によれば、一鋳型用の混練鋳物砂は、鋳型形成分および造型時の余剰分が混合されて次回の混練鋳物砂に再生されて循環されるので、一鋳型用に使用されている鋳物砂の分量および組成を把握することが可能となり、配合工程で必要量の補充成分を容易に適切に配合することができるとともに、鋳造ラインの各所に鋳物砂をストックすることなく、必要最小量の鋳物砂を個々に管理した状態で循環して高品質の鋳型延いては鋳物製品を低コストで製造することができる。
【0016】
請求項5に係る発明の構成上の特徴は、複数の鋳枠を複数の停止位置に搬送する閉ループ状の鋳枠循環装置と、造型停止位置に停止された空の鋳枠が搬入され該空の鋳枠に鋳物砂を鋳物砂投入装置によって投入して鋳型を造型し該鋳型を前記鋳枠循環装置に搬出する造型装置と、鋳型に注湯停止位置で注湯する注湯装置と、注湯後に冷却停止位置を経由して枠ばらし停止位置に停止された鋳型が搬入されて枠ばらしを行った後に空の鋳枠を前記鋳枠循環装置に搬出する枠ばらし装置とを備えた鋳造装置において、前記枠ばらし装置によって枠ばらしされた1個または少数一定個数の既知種類の鋳型から鋳物製品が分離された回収鋳物砂に必要量の補充成分を配合する配合装置と、該補充成分を配合された鋳物砂が投入され水分調整しながら混練する混練機と、該混練機により混練された混練鋳物砂を前記造型装置の鋳物砂投入装置に供給する供給手段と、を備えたことである。
【0017】
本発明では、鋳枠は閉ループ状の鋳枠循環装置によって循環され、空の鋳枠が造型停止位置で造型装置に搬入されて鋳型造型され、注湯停止位置で注湯装置により鋳型に注湯され、注湯済み鋳型は冷却停止位置を搬送される間に冷却される。鋳型は枠ばらし停止位置で枠ばらし装置に搬入されて枠ばらしされ、空にされた鋳枠が鋳枠循環装置に戻される。枠ばらしされた1個または少数一定個数の既知種類の鋳型から鋳物製品が分離された回収鋳物砂に配合装置によって必要量の補充成分が配合される。補充成分が配合された鋳物砂は混練機で水分調整しながら混練され、該混練鋳物砂は鋳物砂投入装置により造型装置において鋳枠内に投入されて鋳型造型される。
【0018】
本発明によれば、枠ばらしされた1個または少数一定個数の既知種類の鋳型から鋳物製品が分離された回収鋳物砂に必要量の補充成分を配合するので、使用されている鋳物砂の量および組成を把握することが可能となり、回収鋳物砂に配合すべき補充成分および配合量を枠ばらしされた鋳型の種類に応じて設定し適正に配合することができ、従来のように大量の鋳物砂を保留する必要がなくなり、ストックスペースおよび費用を削減することができる。そして鋳型造型装置で使用される鋳物砂を少量ずつ混練するので、混練鋳物砂を混練して直ちに最適な組成状態で造型装置において鋳枠内に投入して鋳型造型することができる。
【0019】
また、各装置の作動と関連付けて運転される長い搬送装置が不要となり、混練機、造型装置、注湯装置、枠ばらし装置を独立して運転することが可能となり、各装置を個々の製造工場において単独で試運転して調整することができ、鋳造ラインの設置場所での据付作業、費用および設置スペースを削減することができる。また、各装置が独立しているので、生産形態に合わせた設備の追加省略、生産工場の変更による移転が容易となり、日常のメンテナンスにおいても、各装置の回りにスペースを確保することができ作業が容易になる。このように、回収した鋳物砂を順次成分補充して混練し鋳型造型に直ちに使用できるので、混練鋳物砂が時間経過によって組成劣化をきたすことがなく、また鋳造ラインの製作、据付、変更、メンテナンスにおいて、時間と費用を大幅に削減することができる。
【0020】
請求項6に係る発明の構成上の特徴は、請求項5において、前記配合装置は、前記回収鋳物砂の単位量当たりに配合すべき補充成分および配合量を鋳型の種類別に記憶する記憶手段と、前記配合装置により回収鋳物砂に配合すべき補充成分および配合量を前記記憶手段に鋳型の種類別に記憶された回収鋳物砂の単位量当たりに配合すべき補充成分および配合量に基づいて求める手段と、を備えたことである。
【0021】
本発明によれば、配合装置は、回収鋳物砂に配合すべき補充成分および配合量を、鋳型の種類別に記憶された回収鋳物砂の単位量当たりに配合すべき補充成分および配合量に基づいて、簡単かつ適切に求めることができる。さらに、鋳型の種類別に記憶された回収鋳物砂の単位量当たりに配合すべき補充成分および配合量を実績をフィードバックして適切なものに向上することができて、より高品質な鋳型延いては鋳物製品を製造することができる。
【0022】
請求項7に係る発明の構成上の特徴は、請求項6において、前記配合装置は前記回収鋳物砂の重量を計測する計量手段を備えたことである。これにより、回収鋳物砂に配合すべき補充成分および配合量を、鋳型の種類別に記憶された回収鋳物砂の単位量当たりに配合すべき補充成分および配合量に基づいて正確に算出することができる。
【0023】
請求項8に係る発明の構成上の特徴は、請求項5乃至7のいずれか1項において、前記配合装置は、1個の既知種類の鋳型から鋳物製品を分離された回収鋳物砂に必要量の補充成分を配合し、前記混練機は前記造型装置の近傍に配設され、前記供給手段は一鋳型分の混練砂を前記混練機から前記造型装置の鋳物砂投入装置に直接供給することである。これにより、混練機で混練された混練鋳物砂は直ちに造型装置に投入され、組成劣化を最小限に抑えることができるとともに、従来造型装置上に設けていた鋳物砂貯溜用のバッファタンクが不要になる。
【0024】
請求項9に係る発明の構成上の特徴は、請求項5乃至8のいずれか1項において、前記造型装置を前記閉ループ状の鋳枠循環装置の内側に配置したことである。これにより、鋳造ラインの設置スペースを極めて小さくすることができる。
【0025】
【実施の形態】
以下本発明の第1の実施形態に係る鋳造方法およびこの方法を実施するための鋳造ラインを図面に基づいて説明する。図1,2において、1は複数の上下鋳枠2,3を閉ループ状の搬送路4に沿って設けられた複数の停止位置に順次間欠的に搬送する鋳枠循環装置である。5は鋳枠循環装置1の円形環状の回転台で、回転台5の下面に円周上複数箇所で水平軸線回りに回転可能に支承された転動輪6により環状のレール7上に回転可能に装架されている。レール7はベース8に固定されている。回転台5の内周面は、回転台5が回転中心回りに搬送路4に沿って回転するように複数のローラ9により案内されている。ローラ9は、レール7と同心にベース8に固定されたローラ支持体10の上面に複数箇所で垂直軸線回りに回転可能に支承され、回転台5の内周面に当接している。回転台5の上面には、複数の上下鋳枠2,3が所定間隔で連続してピンで位置決めされ着脱自在に載置されている。複数の上下鋳枠2,3を各停止位置20に順次間欠的に移動させるように回転台5を割出し回転させる駆動装置15として、回転台5の外周下面にベルト溝11が回転台5と同心に設けられ、ベルト溝11とモータ12の出力軸に固定されたプーリ13との間にベルト14が掛け渡されている。モータ12はベース8に固定された取付台16に垂直に取付けられている。
【0026】
造型装置17が搬送路4のループ内側に配置され、造型装置17と対向する搬送路4の造型停止位置18と造型装置17との間に、鋳枠搬送装置19が配置されている。鋳枠搬送装置19は、造型停止位置18に搬送された空の上下鋳枠2,3を造型停止位置18から取出し、下鋳枠3を造型装置17に搬入し、造型された下鋳型23を造型装置17から搬出し、下鋳型23を反転して造型停止位置18に戻し、上鋳枠2を造型装置17に搬入し、造型された上鋳型22を造型装置17から搬出し下鋳型23上に鋳枠合せして鋳型21を形成する。即ち、鋳枠搬送装置19は、造型停止位置18と搬入出位置24との間で鋳枠2,3を移送する移送装置25と、搬入出位置24と造型装置17のキャリアプレート交換位置26との間で鋳枠2,3を搬入出する搬入出装置27と、搬入出位置24に搬出された下鋳型23が造型停止位置18に戻される途中で移送装置25から受け渡された下鋳型23を反転して移送装置25に返却する反転装置28とを備えている。
【0027】
移送装置25は、移送レール29が造型停止位置18と般入出位置24との間に搬送路4を跨いで架台39により上方に架設され、移送レール29上にシリンダ装置により水平方向に移動される移送台30が装架されている。移送台30には、シリンダ装置により昇降される昇降台31が装架され、昇降台31にシリンダ装置により開閉されて鋳枠2,3を把持する把持爪32が枢支されている。
【0028】
搬入出装置27は、シリンダ装置により180度割出し回転される旋回台33が支柱43に支承され、旋回台33の両端には、上下鋳型用の模型35,36が夫々上面に取付けられたキャリアプレート37,38が支承されている。旋回台33の旋回により搬入出位置24に割出されたキャリアプレート37,38上には移送装置25により上下鋳枠2,3が着脱され、キャリアプレート37または38上に載置された上鋳枠2または下鋳枠3が旋回台33の旋回により搬入出位置24と造型装置17のキャリアプレート交換位置26との間で搬入出される。
【0029】
反転装置28は、搬入出位置24と造型停止位置18との間で架台39に装架され、移送装置25の把持爪32で把持された下鋳型23は両側面を対向する挟持体34により挟持され、把持爪32が開放すると挟持体34が180度回転して下鋳型23を反転する。反転された下鋳型23は把持爪32により把持され、挟持体34が開放して移送装置25に返却される。
【0030】
造型装置17は、ベース8上に固定された装置本体40にテーブル41が昇降可能に装架され、テーブル41がシリンダ装置によって僅かに上昇されると、旋回台33の旋回によりキャリアプレート交換位置26に搬入されているキャリアプレート37又は38がテーブル41上に載置される。テーブル41を跨いでアッパベース42が支柱43,44によりベース8に固定され、アッパベース42にシリンダ装置45が垂直に取付けられ、シリンダ装置45の下方に突出したピストンロッド先端にスクイズヘッド46が固定されテーブル41に向かって進退移動されるようになっている。
【0031】
支柱上43,44には適宜厚さを有する水平面状の上盛枠47がテーブル41の上方で固定され、造型装置17の近傍に並設された混練機49の下方まで水平方向に延在している。上盛枠47と下降端に位置するテーブル41との間に、上鋳枠2または下鋳枠3が載置されたキャリアプレート37または38が旋回台33の旋回により搬入され、その後にテーブル41が上昇端に上昇されると上鋳枠2または下鋳枠3の上面が上盛枠47の下面に当接する。上盛枠47には、下面に当接する上鋳枠2または下鋳枠3の側壁内周面と整列する貫通穴が穿設されている。
【0032】
造型装置17にはテーブル41に載置されたキャリアプレート37または38上の上鋳枠2または下鋳枠3内に混練鋳物砂を投入する鋳物砂投入装置50が付設され、鋳物砂投入装置50の投入ホッパー51は、ベース8上に立設された枠体52に水平方向に摺動可能に装架され、混練機49から1個の鋳型分の混練鋳物砂が供給される供給位置と上下鋳枠2,3内に混練鋳物砂を投入する投入位置との間で上盛枠47上面を摺接しながら駆動装置により移動される。上盛枠47の供給位置と対向する部分には、一個の鋳型を造型するために下鋳枠3および上鋳枠2に混練鋳物砂を投入した後に残った余剰鋳物砂を戻しコンベア53上に落下させるためにシャッタで開閉される開口が穿設されている。
【0033】
注湯装置54および枠ばらし装置55が搬送路4に沿って造型停止位置18の両側に夫々配置されている。造型停止位置18において回転台5上で移送装置25により鋳枠合せして形成された鋳型21が、回転台5の回転により注湯装置54と対向する搬送路4の注湯停止位置56に位置決め停止されると、注湯装置54は鋳型21に注湯する。注湯停止位置56から枠ばらし装置55と対向する枠ばらし停止位置57までの間には、複数の冷却停止位置58が設けられ、注湯された鋳型21は複数の冷却停止位置58を通過する間に冷却される。枠ばらし停止位置57において枠ばらし装置55は、冷却された鋳型21を下鋳枠3の下面を支持して回転台5からコンベア60上面より高く持ち上げ、鋳型21がコンベア60上のトレイ59上方に位置するように横移動する。横移動後に、枠ばらし装置55が下鋳枠3の下面を更に上方に持ち上げると、鋳型21の鋳物砂部分が押えロッド86により上方への移動を阻止され、鋳型21が上下鋳枠2,3から押し出されてトレイ59内に入れられる(図3)。空の上下鋳枠2,3は枠ばらし停止位置57で回転台5上に戻される。トレイ59がコンベア60により製品取出し位置61に移送されると、鋳物製品が枠ばらしされた注湯済みの鋳型からマニプレータ62によって鋳物砂と分離されて取出され、砂落とし回転ブラシにより表面に付着した鋳物砂を除去される。このように回収された鋳物砂はトレイ59に収容されてコンベア60によって搬送され、ダマ砕き位置63で回転解砕ロータにより解砕され、異物除去位置64で振動機により振動されて篩にかけられ異物が除去される。異物が除去された回収鋳物砂は配合位置65に搬送され、マグネットにより微細な鉄粉を除去する磁選が行われる。
【0034】
図5に示すように、配合位置65には、枠ばらし装置55によって枠ばらしされた既知種類の鋳型21から鋳物製品が分離された回収鋳物砂に必要量の補充成分を配合する配合装置66が配置されている。配合位置65には搬入されたトレイ59に収容されている回収鋳物砂の重量をトレイ59の重量とともに計測する重量計67が設けられ、配合位置65の上方には補充成分、例えば新砂と、ベントナイト等の粘土分と、石炭粉や澱粉等の微粉分とを夫々収容する補充成分タンク68〜70が設けられている。各補充成分タンク68〜70の下端には例えばソレノイドで駆動されるシャッタ71〜73により開閉される投入口が開口されている。補充成分タンク68〜70と配合位置65との間には重量計74により重量計測される計量ホッパー75が配設され、各補充成分タンク68〜70の投入口からシャッタ71〜73の開放により投下された補充成分は計量ホッパー75に収容されて重量計74によって重量計測されシャッタ71〜73の閉鎖により必要量だけ切出される。必要重量の補充成分を供給された計量ホッパー75は、下端に開口する投入口を開閉するシャッタ76がシリンダ装置によって開放され、収容する必要重量の補充成分をトレイ59内に投下する。
【0035】
コンピュータ77は各種演算処理を行うCPU、CPUが実行する各種プログラム等を予め格納したROM、CPUが演算処理中に必要なデータを読み書きするRAM、および重量計67,74からの計測信号を入力し、開閉信号をシャッタ71〜73,76に出力する入出力回路等から構成されている。更に、ROMには、図6に示すように回収鋳物砂の単位重量、例えば1kg当たりに配合すべき補充成分および配合量が各回収鋳物砂で形成されていた鋳型の種類別に表78にして記憶されている。
【0036】
配合位置65に搬送された回収鋳物砂に配合すべき補充成分および配合量を求める配合プログラム79は、図7に示すように現在鋳造に使用されている鋳型の種類を記憶するメモリに記憶されている鋳型種類を読み出して現在配合位置65に搬送された回収鋳物砂で形成されていた鋳型の種類を特定する(ステップS1)。重量計67から入力された重量からトレイ59自身の重量を減算して配合位置65に搬送された回収鋳物砂の重量を算出する(ステップS2)。この回収鋳物砂の単位量当たりに配合すべき補充成分の配合量が表78から読み出され、これに回収鋳物砂の重量が乗算されて回収鋳物砂に配合すべき各補充成分および配合量が算出される(ステップ3)。配合すべき各補充成分が収容された各補充成分タンク68〜70の各シャッタ71〜73が開かれて配合すべき各補充成分が計量ホッパー75に投下され、重量計74により計測された計量ホッパー75の重量が各補充成分の各配合量だけ増加すると各シャッタ71〜73が閉じられ、配合すべき補充成分が配合量だけ取出されて計量ホッパー75に収容される(ステップ4)。計量ホッパー75のシャッタ76が開かれ、必要量の補充成分がトレイ59に投下されて回収鋳物砂に配合される(ステップ5)。
【0037】
配合位置65と混練機49の投入口との間には搬送レール80が敷設され、搬送レール80に搬送ホッパー81が自走可能に装架されている。搬送ホッパー81は必要量の補充成分が配合された回収鋳物砂を配合位置65でトレイ59から移し替えられ、搬送レール80を混練機49の投入口の上方まで自走し、下端に開口する投入口を開閉するシャッタ82が開かれて補充成分を配合された回収鋳物砂を混練機49に投入する。混練機49は補充成分を配合された回収鋳物砂が投入されると比誘電率を計測することにより砂の水分を計測し、同時に温度を計測し、必要な水を投入する。次に投入口を気密的に閉鎖し、真空ポンプ83により減圧された状態で鋳物砂を水の蒸発により効果的に冷却し水分調整を行いながら混練する。このようにして混練された1個の鋳型分の混練鋳物砂は、鋳物砂投入装置50の投入ホッパー51が供給位置に位置するとき、混練機49の投下口から垂下された供給管84にガイドされて投入ホッパー51に直接供給される。
【0038】
供給位置に対応して上盛枠47に穿設された開口を開閉するシャッタが開かれると、一個の鋳型用の下鋳枠3および上鋳枠2に混練鋳物砂を投入した後に残った余剰鋳物砂が投入ホッパー51から戻しコンベア53に投下される。戻しコンベア53は、余剰鋳物砂が投下される受取位置と、戻し停止位置85との間に設けられ、戻し停止位置85には注湯停止位置56より数ステップ後段の冷却停止位置20が割付けられている。戻しコンベア53は、1個の鋳型21に対応する余剰鋳物砂毎に分離して搬送するように複数区画に分割され、受取位置と戻し停止位置85との間には、造型停止位置18と戻し停止位置85との間に存在する停止位置20の数と同数の区画が設けられ、鋳枠循環装置1の各停止位置20間の間欠移動に連動して1区画ずつ移動される。従って、一鋳型を造型した後に残った余剰鋳物砂は、この一鋳型が注湯された後に戻し停止位置85に搬送されたときに、この一鋳型上に全量投下されて一鋳型用の鋳物砂と混合される。
【0039】
上記のように構成した第1の実施形態に係る鋳造方法および鋳造ラインの作動を説明する。回転台5は、モータ12により所定時間間隔で1ピッチずつ間欠的に割出し回転され、回転台5上に連続して載置された複数の上下鋳枠2,3は閉ループ状の搬送路4に沿って設けられた複数の停止位置20に順次間欠的に割出し停止される。枠ばらし装置55により枠ばらしされ、枠ばらし停止位置57で回転台5上に戻された空の上下鋳枠2,3が造型停止位置18に停止されると、移送装置25の昇降台31が下降して把持爪32が下側に位置する下鋳枠3を把持し、昇降台31が上昇して上下鋳枠2,3を造型停止位置18から取出し、移送台30が搬入出位置24の上方まで水平方向に移動される。搬入出位置24には、下型用の模型36が取付けられたキャリアプレート38が旋回台33の一端に支承されて割出されており、昇降台31が搬入出位置24に下降して下鋳枠3をキャリアプレート38上に載置する。把持爪32は下鋳枠3を解放して上昇し、上昇途中で上鋳枠2を把持して上昇端に後退する。
【0040】
旋回台33が180度旋回されて下鋳枠3を載置したキャリアプレート38が造型装置17のキャリアプレート交換位置26に搬入され、上型用の模型35が取付けられたキャリアプレート37が旋回台33の他端に支承されて搬入出位置24に割出される。昇降台31が搬入出位置24に下降して上鋳枠2をキャリアプレート37上に載置する。テーブル41がシリンダ装置によって上昇端に移動され、キャリアプレート交換位置26に搬入されたキャリアプレート38がテーブル41上に載置され、キャリアプレート38上の下鋳枠3の上端が上盛枠47の下面に当接する。1個の鋳型分の混練鋳物砂が供給位置で混練機49から供給された投入ホッパー51は上盛枠47上面を摺接して投入位置に移動され、上盛枠47に穿設された開口から混練鋳物砂を下鋳枠3内に投入し、投入後に供給位置に後退される。鋳物砂の投入後に、スクイズヘッド46がシリンダ装置45により下降され、下鋳枠3に投入された混練鋳物砂がスクイズされて下鋳型23が造型される。スクイズの完了後、スクイズヘッド46が上昇端まで後退され、テーブル41が下降端まで下降され、下鋳型23を造型したキャリアプレート38が旋回台33の一端に支承される。
【0041】
旋回台33が180度旋回されると、下鋳型23を造型したキャリアプレート38が旋回台33の一端に支承されて搬入出位置24に搬出され、上鋳枠2を載置され上型用の模型35が取付けられたキャリアプレート37が、旋回台33の他端に支承されて造型装置17のキャリアプレート交換位置26に搬入される。昇降台31が搬入出位置24に下降し、把持爪32が下鋳枠3を把持して上昇し、下鋳型23が下型用の模型36から離型される。移送台30が反転装置28と対向する位置に移動され、把持爪32に把持された下鋳型23が両側面を反転装置28の挟持体34により挟持され、把持爪32が開放すると挟持体34が180度回転されて下鋳型23を反転する。反転された下鋳型23は把持爪32により把持され、挟持体34が開放されて移送装置25に返却される。移送台30が造型停止位置18の上方に移動され、昇降台31が下降されて下鋳型23が回転台5上に、下鋳枠3の底面に穿設された穴をピンに嵌合して位置決めしながら載置され、載置後、把持爪32が開放され、昇降台31は上昇される。造型停止位置18で回転台5上に載置された下鋳型23に中子が組込まれて中子納めされる。
【0042】
上型用の模型35が取付けられたキャリアプレート37は、旋回台33の旋回によりキャリアプレート交換位置26に搬入され、上昇するテーブル41上に載置され、上述の下鋳型23の造型と同様に上鋳型22が造型される。造型後、旋回台33の旋回により、上鋳型22を造型したキャリアプレート37が旋回台33の他端に支承されて搬入出位置24に搬出される。昇降台31が搬入出位置24に下降し、把持爪32が上鋳枠2を把持して上昇し、上鋳型22が上型用の模型35から離型される。移送台30が造型停止位置18の上方に移動され、昇降台31が下降されて上鋳型22が下鋳型23上に鋳枠合せされて鋳型21が形成される。
【0043】
所定時間が経過する毎に、回転台5がモータ12により1ピッチずつ間欠的に割出し回転され、鋳型21が造型停止位置18で回転台5上に順次形成され、注湯停止位置56に順次搬送され、注湯装置54により注湯される。注湯された鋳型21は、枠ばらし停止位置57までの間に設けられた複数の冷却停止位置58を通過する間に冷却される。冷却された鋳型21は枠ばらし停止位置57で枠ばらし装置55により枠ばらしされ、上下鋳枠2,3が取り外されてトレイ59内に入れられ、空の上下鋳枠2,3は枠ばらし停止位置57で回転台5上に戻される。枠ばらしされた鋳型21から鋳物製品が製品取出し位置61で取出され、砂落とし回転ブラシにより鋳物砂を除去されて鋳物砂と分離される。回収された鋳物砂はトレイ59に収容されて搬送され、ダマ砕き位置63で解砕され、異物除去位置64で篩にかけられて異物が除去され、配合位置65で磁選される。
【0044】
配合位置65では、現在使用されている鋳型の種類がメモリから読み出され、重量計67から入力された重量から回収鋳物砂の重量が算出される。この回収鋳物砂1kg当たりに配合すべき各補充成分の配合量が表78から読み出され、これに回収鋳物砂の重量が乗算されて回収鋳物砂に配合すべき各補充成分および配合量が算出される。配合すべき各補充成分が収容された各補充成分タンク68〜70の各シャッタ71〜73が開かれ、配合すべき各補充成分の重量が重量計74で計測されて計量ホッパー75に投下され、計量ホッパー75からトレイ59に投入されて回収鋳物砂に配合される。
【0045】
搬送ホッパー81は補充成分が配合された回収鋳物砂をトレイ59から移し替えられ、搬送レール80を混練機49の投入口の上方まで自走し、補充成分を配合された回収鋳物砂を混練機49に投入する。混練機49は補充成分が配合された回収鋳物砂を水分補給して水分調整および冷却しながら混練する。混練された一鋳型分の混練鋳物砂は、混練機49から鋳物砂投入装置50の供給位置に位置する投入ホッパー51に直接供給される。下鋳枠3に続いて上鋳枠2に混練鋳物砂を投入した後に、投入ホッパー51が供給位置に後退されると、上盛枠47のシャッタが開かれて一鋳型を造型した後に残った余剰鋳物砂が戻しコンベア53上に投下される。余剰鋳物砂は戻しコンベア53により戻し停止位置85に搬送されて一鋳型用の鋳物砂と混合される。
【0046】
上記実施の形態では、1枚の回転台5を環状のレール7上に回転可能に装架して、鋳枠循環装置1を構成しているが、円形、楕円形、角部をR形状にした多角形などのループ状に敷設した一対のレール上に複数台の搬送台車を車輪により転動可能に装架し、各搬送台車を枢着ピンにより連結し、押動位置に割出された搬送台車を割出し装置により1ピッチずつ押動し、搬送台車に夫々載置された複数の上下鋳枠2,3を閉ループ状の搬送路に沿って設けられた複数の停止位置に順次間欠的に搬送するようにしてもよい。また、複数台の搬送台車を枢着ピンで連結することなく、押動位置で割出し装置により1ピッチ押動された搬送台車を起点にして前方の搬送台車を順次押動するようにしてもよい。
【0047】
次に、本発明の第2の実施形態について、図8に基づいて説明する。上記第1の実施形態では、鋳枠循環装置が1個の搬送装置によって構成され、複数の上下鋳枠2,3が閉ループ状の搬送路に沿って1ピッチずつ一斉に搬送されているが、第2の実施形態では、鋳枠循環装置が複数個の搬送装置によって構成され、複数の上下鋳枠2,3が閉ループ状の搬送路の各区間を各搬送装置によって搬送される点のみが第1の実施形態と異なり、他の構成は同様であるので、第1の実施形態と同じ構成要素には同一の参照番号を付して説明を省略し、主として相違点について説明する。
【0048】
図8に示すように、閉ループ状の鋳枠循環装置87は、造型装置17が配置された第1搬送装置88、注湯装置54が配置された第2搬送装置89、冷却停止位置を提供する第3搬送装置90、および枠ばらし装置55が配置された第4搬送装置91によって構成されている。第1搬送装置88のローラコンベア92上に載置され鋳枠送り装置93とクッション装置94とに挟持されて各停止位置20を1ピッチずつ移送された空の上下鋳枠2,3が造型停止位置18で造型装置17に搬入されて下鋳型23、上鋳型22が交互に造型されてローラコンベア92上に戻される。95は下鋳型23を上下反転させる鋳枠反転装置で、これによりローラコンベア92から鋳枠反転装置95に搬入された下鋳型23はドラムの180度回転により反転されてローラコンベア92上に搬出され、1ピッチ移送されて台車セット装置96に搬送される。台車セット装置96には、シリンダ装置によって昇降される昇降台が配置されている。昇降台は下鋳型23が台車セット装置96に搬入されたときのみ上昇され、台車セット装置96に投入された搬送台車97を載置して上昇し、ローラコンベア92に支持された下鋳型23を搬送台車97上に支持してローラコンベア92から僅かに離脱させる。上昇された昇降台上のレールと連続するレールがローラコンベア92と平行に設けられ、台車セット装置96以降は、下鋳型23はレール上を走行する搬送台車97上に載置された状態で移送され、上鋳型22はローラコンベア92上を移送される。下鋳型23は鋳枠反転装置95で反転されて台車セット装置96に投入された搬送台車97上に載置され、中子入れ等必要な作業が行なわれる。台車セット装置96に隣接して鋳枠合せ装置98が配置され、鋳枠合せ装置98により上鋳型22が下鋳型23に鋳枠合せされて鋳型21が形成される。
【0049】
鋳型21を載置した搬送台車97は、第1鋳枠方向転換装置99により90度方向転換され、第2搬送装置89を構成する鋳枠送り装置100とクッション装置101とに挟持されてレール上を各停止位置20に1ピッチずつ移送され、注湯停止位置56で注湯装置54により注湯される。注湯された鋳型21を載置した搬送台車97は、第2鋳枠方向転換装置102により90度方向転換され、第3搬送装置90を構成する鋳枠送り装置103とクッション装置104とに挟持されてレール上をローラコンベア92の搬送方向と平行に逆方向に各冷却停止位置58を1ピッチずつ移送され、その間に鋳物が冷却される。注湯された鋳型21を載置した搬送台車97が、台車分離装置105上に搬入されると、鋳型21をローラコンベア上に残して搬送台車97が下降され、鋳型21が第4搬送装置91を構成する鋳枠送り装置106とクッション装置107とに挟持されてローラコンベア上を各停止位置20に1ピッチずつ移送されて枠ばらし装置55に搬入され、鋳型21が上下鋳枠2,3から分離され、コンベア60上のトレイ59内に入れられる。重合された上下鋳枠2,3は、鋳枠分離装置108により上鋳枠2、下鋳枠3に分離されてローラコンベア92に搬入される。
【0050】
台車分離装置105により下降された搬送台車97は、下方レール上に載置されて台車戻し箇所109に移送される。台車戻し箇所109には、シリンダ装置によって昇降される昇降台が配置され、昇降台は搬送台車97が搬入されると下降し、搬送台車97をローラコンベア上に支持させる。ローラコンベア上に支持された搬送台車97は台車送り装置110により台車セット装置96に投入される。
【0051】
このように構成された閉ループ状の鋳枠循環装置87において、混練機49が造型装置17の近傍に並設され、配合位置65と混練機49の投入口との間には搬送レール80が敷設され、搬送レール80に搬送ホッパー81が自走可能に装架されている。搬送ホッパー81は必要量の補充成分が配合された回収鋳物砂を配合位置65でトレイ59から移し替えられ、搬送レール80を混練機49の投入口の上方まで自走し、補充成分を配合された回収鋳物砂を混練機49に投入する。混練機49は補充成分を配合された回収鋳物砂を水分調整しながら混練する。混練された1個の鋳型分の混練鋳物砂は、造型装置17の鋳物砂投入装置の投入ホッパーに直接供給される。
【0052】
一個の鋳型用の下鋳枠3および上鋳枠2に混練鋳物砂を投入した後に残った余剰鋳物砂は投入ホッパーから戻しコンベア53に投下される。戻しコンベア53は、余剰鋳物砂が投下される受取位置と、注湯停止位置56より後段の戻し停止位置85との間に設けられ、戻しコンベア53は、1個の鋳型21に対応する余剰鋳物砂毎に分離して搬送するように複数区画に分割され、受取位置と戻し停止位置85との間には、造型停止位置18と戻し停止位置85との間に存在する停止位置20の数と同数の区画が設けられ、鋳枠循環装置87の第3搬送装置90の1ピッチずつの移動に連動して1区画ずつ移動される。従って、一鋳型を造型した後に残った余剰鋳物砂は、この一鋳型が注湯された後に戻し停止位置85に搬送されたときに、この一鋳型上に全量投下されて一鋳型用の鋳物砂と混合される。
【0053】
上記実施の形態では、1個の鋳型分の回収鋳物砂に必要量の補充成分を配合しているが、配合位置65で少数一定個数(例えば、2,3個)の鋳型分の回収鋳物砂を集めて必要量の補充成分を配合し、混練機49に投入して混練するようにしても良い。この場合、少数一定個数の鋳型21を造型した後に投入ホッパー51に残った余剰鋳物砂を、該少数一定個数の鋳型21を形成していた回収鋳物砂と配合位置65で混合するように戻しコンベアを受取位置と配合位置65との間に設けても良い。
【0054】
上記実施の形態では、回収鋳物砂の単位量当たりに配合すべき各補充成分の配合量は、回収鋳物砂の単位重量当たり、例えば1kg当たりに配合すべき各補充成分の配合重量として記憶しているが、回収鋳物砂により形成されていた鋳型1個当たりに配合すべき各補充成分の配合重量または配合容積を鋳型の種類別に記憶するようにしてもよい。
【図面の簡単な説明】
【図1】本第1の実施形態に係る鋳造ラインを示す図。
【図2】図1のA‐A矢視図。
【図3】図1のB−B矢視図。
【図4】図1のC−C矢視図。
【図5】回収鋳物砂に補充成分を配合して混練機に投入する説明図。
【図6】回収鋳物砂に配合する補充成分および配合量を鋳型別に記憶したテーブルを示す図。
【図7】回収鋳物砂に必要量の補充成分を配合するプログラムを示す図。
【図8】第2の実施形態に係る鋳造ラインを示す図。
【符号の説明】
1,87…鋳枠循環装置、2…上鋳枠、3…下鋳枠、4…搬送路、5…回転台、7…環状のレール、15…駆動装置、17…造型装置、18…造型停止位置、19…鋳枠搬送装置、20…停止位置、21…鋳型、22…上鋳型、23…下鋳型、24…搬入出位置、25…移送装置、26…キャリアプレート交換位置、27…搬入出装置、28…反転装置、33…旋回台、35,36…上下鋳型用の模型、37,38…キャリアプレート、40…装置本体、41…テーブル、46…スクイズヘッド、47…上盛枠、49…混練機、51…投入ホッパー、53…戻しコンベア、54…注湯装置、55…枠ばらし装置、56…注湯停止位置、57…枠ばらし停止位置、58…冷却停止位置、59…トレイ、60…コンベア、61…製品取出し位置、62…マニプレータ、63…ダマ砕き位置、64…異物除去位置、65…配合位置、66…配合装置、67,74…重量計、68〜70…補充成分タンク、71〜73,82…シャッタ、75…計量ホッパー、77…コンピュータ、78…表、79…配合プログラム、80…搬送レール、81…搬送ホッパー、供給管、85…戻し停止位置、88〜91…第1乃至第4搬送装置。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for casting a cast product and a casting line for carrying out the method.
[0002]
[Prior art]
Conventionally, in a molding apparatus, an amount of foundry sand and replenishment components necessary for molding one mold consisting of an upper mold and a lower mold are put into a kneader, and kneaded with a kneader to produce a kneaded cast sand. Patent Document 1 discloses an apparatus for supplying kneaded sand to a molding apparatus that conveys the kneaded sand for one mold to a sand storage hopper of the molding apparatus by a conveying apparatus.
[0003]
[Patent Document 1]
JP 2002-66688 A (2nd page, FIG. 1)
[0004]
[Problems to be solved by the invention]
However, in the apparatus for supplying kneaded sand to the molding apparatus described in Patent Document 1, a large amount of foundry sand to be fed into the kneader is prepared in order to keep the component ratio of the foundry sand thrown into the kneader. However, it was necessary to specify the components and amount to be replenished to the foundry sand. For this reason, it is necessary to always store a large amount of foundry sand, which requires labor and space and increases costs.
[0005]
The present invention has been made to solve such conventional problems, and in a closed-loop casting line, a replenishment component of a necessary amount in foundry sand obtained by separating a cast product from one or a small number of known types of molds. Is appropriately blended at low cost.
[0006]
[Means and functions for solving the problems and effects of the invention]
In order to solve the above-mentioned problem, the structural feature of the invention described in claim 1 is that a plurality of casting frames are conveyed to a plurality of stop positions by a closed-loop casting frame circulation device and conveyed to a molding stop position. An empty casting frame is carried into a molding apparatus, casting sand is poured into it, a mold is formed, the mold is returned to the casting frame circulation apparatus, and the mold is poured at a pouring stop position. In the casting method in which the casting of the mold conveyed to the frame breaking stop position is repeated, the casting sand separated from the casting product from the casting mold is separated and recovered for each casting frame, and the other castings are separated. It is to mix and knead the necessary amount of supplementary components without mixing with the foundry sand separated and recovered from the mold separated from the frame.
[0007]
In the present invention, the casting frame is circulated by a closed-loop casting frame circulation device, and the empty casting frame is carried into the molding device at the molding stop position and casted into the mold, and poured into the mold at the pouring stop position. The finished mold is cooled while being transported through the cooling stop position. The mold is separated by the frame separation device at the frame separation stop position. The foundry sand from which the cast product has been separated from the mold separated from the frame is separated and recovered for each cast frame. The foundry sand separated and recovered for each of the casting frames is mixed and kneaded with a necessary amount of supplemental components without being mixed with the foundry sand separated and recovered from the mold separated from the other casting frames. Thereby, the storage tank which stores a lot of foundry sand becomes unnecessary, and an installation area and cost can be reduced. And, since the replenishment component of the required amount is blended and kneaded in the molding sand separated and recovered for each casting frame and used in the mold molding process, the mold molding can be performed with the molding sand of the optimum composition state immediately after the kneading. .
[0008]
The structural feature of the invention described in claim 2 is that a plurality of casting frames are conveyed to a plurality of stop positions by a closed-loop casting frame circulation device, and empty casting frames conveyed to the molding stop position are transferred to the molding device. It is carried in and cast sand is cast to mold the mold, and the mold is returned to the casting frame circulation device, poured into the mold at the pouring stop position, and after pouring, the pouring is stopped via the cooling stop position. In the casting method in which the transported mold is repeatedly separated, a replenishment component of a necessary amount is added to the recovered foundry sand from which the cast product is separated from the one or a small number of known molds separated from the frame. A blending step, a step of kneading the foundry sand blended with the replenishment component with a kneader while adjusting moisture, a step of charging the kneaded kneaded foundry sand into the empty casting frame in the molding apparatus, It is to have.
[0009]
In the present invention, the casting frame is circulated by a closed-loop casting frame circulation device, and the empty casting frame is carried into the molding device at the molding stop position to be cast, and poured into the mold at the pouring stop position. The finished mold is cooled while being transported through the cooling stop position. The mold is carried into the frame separating device at the frame separating stop position and separated. The foundry product is separated from one or a fixed number of known types of molds separated from the frame, and the foundry sand is recovered. A necessary amount of supplemental components is blended in the recovered foundry sand. The foundry sand in which the replenishment component is blended is kneaded while adjusting the water content with a kneader, and the kneaded foundry sand is conveyed to a molding apparatus and put into a casting frame to be cast.
[0010]
According to the present invention, a replenishment component to be blended into the recovered foundry sand is added to the recovered foundry sand because the required amount of the replenishment component is blended into the recovered foundry sand from which the cast product is separated from one or a small number of known types of molds. Ingredients and blending amounts can be set according to the type of molds that have been separated and properly blended, eliminating the need to hold a large amount of foundry sand as in the past, reducing stock space and costs . Then, since the foundry sand used in the mold making process is kneaded little by little, the kneaded foundry sand can be kneaded and immediately supplied to the mold making process in an optimum composition state to perform mold making.
[0011]
In addition, there is no need for a long conveying device that is operated in association with the operations of the kneading, mold making, and frame breaking processes, and the kneading, mold making, pouring, and frame breaking processes can be performed independently. The apparatus according to each process can be adjusted by trial operation independently at each manufacturing factory, and installation work, cost and installation space at the installation location of the facility can be reduced. In addition, since each process is independent, it is easy to omit the addition of equipment according to the production form, transfer by changing the production factory, and secure a space around the equipment related to each process in daily maintenance. Can be done easily. In this way, the recovered foundry sand can be replenished sequentially and kneaded and used immediately for mold making, so that the kneaded foundry sand does not deteriorate in composition over time, and in the production, installation, modification and maintenance of equipment. , Time and expense can be greatly reduced.
[0012]
The structural feature of the invention according to claim 3 is that, in claim 2, in the blending step, the replenishing component and the blending amount to be blended per unit amount of the recovered foundry sand are stored in the storage means for each type of mold. And the replenishment component to be blended per unit amount of the recovered foundry sand stored in the storage means for each type of mold stored in the storage means. And a step of obtaining based on the quantity.
[0013]
In the present invention, the replenishment component and the blending amount to be blended per unit amount of the recovered foundry sand are stored in the storage means for each type of mold. The replenishment components and amount to be blended in the recovered foundry sand separated and recovered from the casting mold separated from the frame should be blended per unit amount of the recovered foundry sand stored in the storage means for each type of mold. Since it is determined based on the replenishment component and the blending amount, the replenishment component and the blending amount to be blended in the recovered foundry sand can be determined quickly and accurately by a simple method. Further, it is possible to feed back the replenishing components and the blending amount to be blended per unit amount of the recovered foundry sand stored for each type of mold in the storage means and to make it more appropriate by feeding back the results.
[0014]
The constitutional feature of the invention according to claim 4 is that, in claim 2 or 3, the blending step blends a necessary amount of supplemental components into the recovered foundry sand from which the cast product is separated from one known type of mold. Then, after pouring all the amount of surplus kneading foundry sand kneaded by the kneading machine that has not been put into the casting mold for the one mold in the molding apparatus, It is to mix with foundry sand.
[0015]
According to the present invention, the kneading foundry sand for one mold is used for one mold because the mold forming portion and the surplus at the time of molding are mixed and regenerated and circulated into the next kneading foundry sand. The amount and composition of foundry sand can be ascertained, and the required amount of supplemental components can be easily and properly blended in the blending process, and the minimum amount required without having to stock the foundry sand at various locations on the casting line. The casting sand can be circulated in an individually controlled state to produce a high-quality mold and a casting product at a low cost.
[0016]
The structural feature of the invention according to claim 5 is that a closed-loop-shaped cast-plate circulation device that transports a plurality of casting frames to a plurality of stop positions, and an empty casting frame stopped at the molding stop position are carried in and Casting sand is poured into a casting frame by a casting sand feeding device to mold a mold, and the casting mold is transported to the casting frame circulation device, a pouring device for pouring the mold at a pouring stop position, A casting apparatus comprising a frame separating device for carrying out an empty casting frame to the casting frame circulation device after the mold stopped at the frame breaking stop position is carried in via the cooling stop position after hot water A blending device for blending a replenishment component in a required amount into the recovered foundry sand from which a cast product has been separated from one or a small number of known types of molds separated by the frame stripping device. Cast sand is mixed and mixed while adjusting moisture. A kneader, is to have and a supply means for supplying the molding sand dosing device kneading foundry sand kneaded the molding apparatus by kneading machine.
[0017]
In the present invention, the casting frame is circulated by a closed-loop casting frame circulation device, and an empty casting frame is carried into the molding device at the molding stop position to be cast, and then poured into the mold by the pouring device at the pouring stop position. Then, the poured mold is cooled while being conveyed at the cooling stop position. The casting mold is carried into the frame breaking device at the frame breaking stop position and separated, and the emptied casting frame is returned to the casting frame circulating device. A required amount of supplemental components is blended by a blending device into the recovered foundry sand from which the cast product is separated from one or a small number of known types of molds separated from each other. The foundry sand in which the replenishment component is blended is kneaded while adjusting the moisture with a kneader, and the kneaded foundry sand is put into a casting frame by a foundry sand casting apparatus and molded into a mold.
[0018]
According to the present invention, the required amount of replenishing components is added to the recovered foundry sand from which the foundry product is separated from one or a small number of known types of molds separated from each other, so the amount of foundry sand used. It is possible to ascertain the composition and the replenishment components to be blended into the recovered foundry sand and the blending amount can be set according to the type of the mold that has been divided, and can be blended appropriately. There is no need to hold sand and stock space and costs can be reduced. Then, since the foundry sand used in the mold making apparatus is kneaded little by little, the kneaded foundry sand can be kneaded and immediately put into the casting frame in the mold making apparatus in the optimum composition state to mold the mold.
[0019]
In addition, there is no need for a long conveying device that is operated in association with the operation of each device, and it is possible to operate the kneader, the molding device, the pouring device, and the frame separating device independently. Can be adjusted by trial run alone, and installation work, cost and installation space at the installation site of the casting line can be reduced. In addition, since each device is independent, it is easy to omit the addition of equipment according to the production form, and transfer by changing the production plant, and it is possible to secure a space around each device for daily maintenance. Becomes easier. In this way, the recovered foundry sand can be replenished sequentially and kneaded and used immediately for mold making, so that the kneaded foundry sand does not deteriorate in composition over time, and the production, installation, change and maintenance of the casting line. Can save a lot of time and money.
[0020]
The constitutional feature of the invention according to claim 6 is the storage device according to claim 5, wherein the blending device stores replenishing components and blending amounts to be blended per unit amount of the recovered foundry sand according to mold type. Means for obtaining the replenishment component and the blending amount to be blended into the recovered foundry sand by the blending device based on the replenishment component and the blending amount to be blended per unit amount of the recovered foundry sand stored in the storage means for each type of mold. It is to have.
[0021]
According to the present invention, the blending apparatus determines the replenishment component and blending amount to be blended in the recovered foundry sand based on the replenishment component and blending amount to be blended per unit amount of the recovered foundry sand stored for each type of mold. Can be sought easily and appropriately. Furthermore, it is possible to improve the replenishment component and the blending amount to be blended per unit amount of the recovered foundry sand stored for each type of mold by feeding back the results to an appropriate one. Casting products can be manufactured.
[0022]
The structural feature of the invention according to claim 7 is that, in claim 6, the compounding apparatus is provided with a measuring means for measuring the weight of the recovered foundry sand. Thereby, the replenishment component and the compounding amount which should be mix | blended with collection | recovery foundry sand can be correctly calculated based on the replenishment component and the compounding amount which should be mix | blended per unit quantity of the collection | recovery foundry sand memorize | stored according to the kind of casting_mold | template. .
[0023]
A structural feature of the invention according to claim 8 is that, in any one of claims 5 to 7, the blending device is required for the recovered foundry sand obtained by separating the cast product from one known type of mold. The kneading machine is disposed in the vicinity of the molding apparatus, and the feeding means directly feeds the kneading sand for one mold from the kneading machine to the foundry sand charging apparatus of the molding apparatus. is there. As a result, the kneaded foundry sand kneaded by the kneading machine is immediately put into the molding apparatus, and composition deterioration can be suppressed to the minimum, and the buffer tank for storing the foundry sand previously provided on the molding apparatus is unnecessary. Become.
[0024]
A structural feature of the invention according to claim 9 is that, in any one of claims 5 to 8, the molding apparatus is arranged inside the closed-loop-shaped casting frame circulating apparatus. Thereby, the installation space of a casting line can be made very small.
[0025]
Embodiment
Hereinafter, a casting method according to a first embodiment of the present invention and a casting line for carrying out the method will be described with reference to the drawings. In FIGS. 1 and 2, reference numeral 1 denotes a casting frame circulating device that sequentially and intermittently conveys a plurality of upper and lower casting frames 2 and 3 to a plurality of stop positions provided along a closed loop conveying path 4. Reference numeral 5 denotes a circular ring-shaped turntable of the casting frame circulation device 1, which can be rotated on a ring-shaped rail 7 by rolling wheels 6 supported on the lower surface of the turntable 5 so as to be rotatable around a horizontal axis at a plurality of positions on the circumference. It is mounted. The rail 7 is fixed to the base 8. The inner peripheral surface of the turntable 5 is guided by a plurality of rollers 9 so that the turntable 5 rotates along the conveyance path 4 around the rotation center. The roller 9 is supported on the upper surface of the roller support 10 fixed to the base 8 concentrically with the rail 7 so as to be rotatable about a vertical axis at a plurality of locations, and is in contact with the inner peripheral surface of the turntable 5. On the upper surface of the turntable 5, a plurality of upper and lower casting frames 2 and 3 are continuously positioned at predetermined intervals and are detachably mounted with pins. As a driving device 15 for indexing and rotating the turntable 5 so as to intermittently move the plurality of upper and lower casting frames 2 and 3 sequentially to each stop position 20, a belt groove 11 is formed on the lower surface of the outer periphery of the turntable 5. A belt 14 is stretched between a belt groove 11 and a pulley 13 fixed to the output shaft of the motor 12. The motor 12 is vertically mounted on a mounting base 16 fixed to the base 8.
[0026]
A molding apparatus 17 is arranged inside the loop of the conveyance path 4, and a casting frame conveyance apparatus 19 is arranged between the molding stop position 18 of the conveyance path 4 facing the molding apparatus 17 and the molding apparatus 17. The casting frame conveying device 19 takes the empty upper and lower casting frames 2 and 3 conveyed to the molding stop position 18 from the molding stopping position 18, carries the lower casting frame 3 into the molding device 17, and forms the molded lower mold 23. Unloading from the molding apparatus 17, the lower mold 23 is reversed and returned to the molding stop position 18, the upper casting frame 2 is loaded into the molding apparatus 17, and the molded upper mold 22 is unloaded from the molding apparatus 17 on the lower mold 23. The mold 21 is formed by aligning with the casting frame. That is, the casting frame conveying device 19 includes a transfer device 25 for transferring the casting frames 2 and 3 between the molding stop position 18 and the carry-in / out position 24, and a carry-in / out position 24 and a carrier plate replacement position 26 of the molding device 17. A loading / unloading device 27 for loading and unloading the casting frames 2 and 3 between the lower casting mold 23 and a lower casting mold 23 delivered from the transfer device 25 in the middle of returning the lower casting mold 23 to the loading / unloading position 24 to the molding stop position 18. And a reversing device 28 for reversing and returning it to the transfer device 25.
[0027]
The transfer device 25 is constructed such that the transfer rail 29 is installed above the transfer path 29 between the molding stop position 18 and the general entry / exit position 24 by the pedestal 39 and is moved horizontally on the transfer rail 29 by the cylinder device. A transfer table 30 is mounted. On the transfer table 30, a lifting table 31 that is lifted and lowered by a cylinder device is mounted, and a gripping claw 32 that is opened and closed by the cylinder device and grips the casting frames 2 and 3 is pivotally supported on the lifting table 31.
[0028]
In the carry-in / out device 27, a swivel base 33 that is indexed and rotated by 180 degrees by a cylinder device is supported by a support column 43. At both ends of the swivel base 33, upper and lower mold models 35 and 36 are respectively attached to the upper surface. Plates 37 and 38 are supported. The upper and lower casting frames 2 and 3 are attached to and detached from the carrier plates 37 and 38 indexed to the loading / unloading position 24 by the turning of the swivel base 33 by the transfer device 25, and the upper castings placed on the carrier plates 37 or 38 are mounted. The frame 2 or the lower casting frame 3 is carried in / out between the carry-in / out position 24 and the carrier plate exchange position 26 of the molding apparatus 17 by the turning of the turntable 33.
[0029]
The reversing device 28 is mounted on the gantry 39 between the carry-in / out position 24 and the molding stop position 18, and the lower mold 23 held by the holding claws 32 of the transfer device 25 is held between the holding members 34 facing both sides. When the gripping claws 32 are opened, the holding body 34 rotates 180 degrees to reverse the lower mold 23. The inverted lower mold 23 is gripped by the gripping claws 32, the clamping body 34 is opened and returned to the transfer device 25.
[0030]
In the molding apparatus 17, the table 41 is mounted on the apparatus main body 40 fixed on the base 8 so that the table 41 can be raised and lowered. When the table 41 is slightly raised by the cylinder device, the carrier plate replacement position 26 is turned by the turning of the turntable 33. The carrier plate 37 or 38 carried in is placed on the table 41. The upper base 42 is fixed to the base 8 by struts 43, 44 across the table 41, the cylinder device 45 is vertically mounted on the upper base 42, and the squeeze head 46 is fixed to the tip of the piston rod protruding below the cylinder device 45. The table 41 is moved forward and backward.
[0031]
On the support pillars 43 and 44, a horizontal flat frame 47 having an appropriate thickness is fixed above the table 41 and extends in the horizontal direction to the lower side of the kneader 49 arranged in parallel in the vicinity of the molding apparatus 17. ing. A carrier plate 37 or 38 on which the upper casting frame 2 or the lower casting frame 3 is placed is carried in between the upper frame 47 and the table 41 positioned at the lower end, and then the table 41 is loaded. Is raised to the rising end, the upper surface of the upper casting frame 2 or the lower casting frame 3 comes into contact with the lower surface of the upper frame 47. The upper frame 47 is provided with a through hole aligned with the inner peripheral surface of the side wall of the upper casting frame 2 or the lower casting frame 3 in contact with the lower surface.
[0032]
The molding apparatus 17 is provided with a foundry sand loading apparatus 50 for charging the kneaded foundry sand into the upper casting frame 2 or the lower casting frame 3 on the carrier plate 37 or 38 placed on the table 41. The charging hopper 51 is slidably mounted on a frame 52 standing on the base 8 so as to be slidable in the horizontal direction. The upper frame 47 is moved by the driving device while sliding on the upper surface of the upper frame 47 between the charging positions where the kneaded casting sand is charged into the casting frames 2 and 3. In the portion facing the supply position of the upper frame 47, excess cast sand remaining after the kneaded cast sand is put into the lower casting frame 3 and the upper casting frame 2 to form a single mold is returned to the conveyor 53. An opening that is opened and closed by a shutter is provided in order to drop.
[0033]
A pouring device 54 and a frame separating device 55 are arranged on both sides of the molding stop position 18 along the transport path 4. The mold 21 formed by aligning the casting frames on the turntable 5 by the transfer device 25 at the molding stop position 18 is positioned at the pouring stop position 56 of the conveying path 4 facing the pouring device 54 by the rotation of the turntable 5. When stopped, the pouring device 54 pours the mold 21. A plurality of cooling stop positions 58 are provided between the pouring stop position 56 and the frame spreading stop position 57 facing the frame spreading device 55, and the poured mold 21 passes through the plurality of cooling stop positions 58. Cooled in between. At the frame separation stop position 57, the frame separation device 55 supports the lower surface of the lower casting frame 3 to lift the cooled mold 21 higher than the upper surface of the conveyor 60 from the turntable 5, and the mold 21 is above the tray 59 on the conveyor 60. Move horizontally to be positioned. After the lateral movement, when the frame separating device 55 lifts the lower surface of the lower casting frame 3 further upward, the casting sand portion of the mold 21 is prevented from moving upward by the presser rod 86, and the casting mold 21 is moved upward and downward. Are pushed into the tray 59 (FIG. 3). The empty upper and lower casting frames 2 and 3 are returned to the turntable 5 at the frame discontinuation stop position 57. When the tray 59 is transferred to the product take-out position 61 by the conveyor 60, the cast product is separated from the foundry sand by the manipulator 62 from the poured mold in which the cast product has been separated from the frame, and is attached to the surface by the sand dropping rotary brush. Foundry sand is removed. The casting sand recovered in this way is accommodated in the tray 59 and conveyed by the conveyor 60, and is crushed by the rotary crushing rotor at the dama crushing position 63, and is vibrated by the vibrator at the foreign substance removing position 64 and passed through a sieve, and then the foreign substance. Is removed. The recovered foundry sand from which the foreign matter has been removed is conveyed to the blending position 65, and magnetic separation is performed to remove fine iron powder with a magnet.
[0034]
As shown in FIG. 5, at the blending position 65, there is a blending device 66 that blends a necessary amount of supplemental components into the recovered foundry sand from which the casting product has been separated from the known type of mold 21 separated by the frame stripping device 55. Has been placed. The blending position 65 is provided with a weigh scale 67 for measuring the weight of the recovered foundry sand accommodated in the tray 59 carried in together with the weight of the tray 59. Above the blending position 65, supplementary components such as fresh sand and bentonite are provided. Etc., and replenishment component tanks 68 to 70 for containing a fine powder such as coal powder and starch, respectively, are provided. At the lower end of each of the replenishing component tanks 68 to 70, for example, a charging port that is opened and closed by shutters 71 to 73 driven by solenoids is opened. Between the replenishing component tanks 68 to 70 and the blending position 65, a weighing hopper 75 that is weighed by a weigh scale 74 is arranged, and dropped by opening the shutters 71 to 73 from the charging ports of the replenishing component tanks 68 to 70. The replenished component is stored in the weighing hopper 75, weighed by the weigh scale 74, and cut out by a necessary amount by closing the shutters 71 to 73. In the weighing hopper 75 supplied with the replenishment component of the necessary weight, the shutter 76 that opens and closes the charging port opened at the lower end is opened by the cylinder device, and the replenishment component of the necessary weight to be accommodated is dropped into the tray 59.
[0035]
A computer 77 inputs a measurement signal from a CPU that performs various arithmetic processing, a ROM that stores various programs executed by the CPU in advance, a RAM that reads and writes data necessary for the CPU during arithmetic processing, and weight scales 67 and 74. And an input / output circuit for outputting an open / close signal to the shutters 71 to 73 and 76. Further, in the ROM, as shown in FIG. 6, the unit weight of the recovered foundry sand, for example, the replenishment components to be blended per kg and the blended amount are stored in Table 78 according to the type of the mold formed with each recovered foundry sand. Has been.
[0036]
A blending program 79 for obtaining supplementary components and blending amounts to be blended in the recovered foundry sand transported to the blending position 65 is stored in a memory for storing the type of mold currently used for casting as shown in FIG. The type of mold that has been formed from the recovered foundry sand that has been transferred to the blending position 65 is read out (step S1). The weight of the tray 59 itself is subtracted from the weight input from the weight scale 67 to calculate the weight of the recovered foundry sand conveyed to the blending position 65 (step S2). The blending amount of the replenishment component to be blended per unit amount of the recovered foundry sand is read from Table 78, and the weight of the recovered foundry sand is multiplied by this to determine each replenishment component and blending amount to be blended in the recovered foundry sand. Calculated (step 3). Each of the replenishing component tanks 68 to 70 in which the replenishing components to be blended are opened, the respective shutters 71 to 73 are opened, each replenishing component to be blended is dropped onto the weighing hopper 75, and the weighing hopper measured by the weight meter 74. When the weight of 75 increases by the blending amount of each supplement component, the shutters 71 to 73 are closed, and the supplement component to be blended is taken out and stored in the weighing hopper 75 (step 4). The shutter 76 of the weighing hopper 75 is opened, and a necessary amount of supplemental components are dropped onto the tray 59 and blended with the recovered foundry sand (step 5).
[0037]
A transport rail 80 is laid between the blending position 65 and the charging port of the kneader 49, and a transport hopper 81 is mounted on the transport rail 80 so as to be able to run on its own. The transport hopper 81 transfers the recovered foundry sand containing the required amount of supplemental components from the tray 59 at the blending position 65, and the transport rail 80 is self-propelled above the input port of the kneader 49 and opens at the lower end. The shutter 82 that opens and closes the mouth is opened, and the recovered foundry sand containing the supplemental components is put into the kneader 49. The kneading machine 49 measures the water content of the sand by measuring the relative permittivity when the recovered foundry sand mixed with the replenishing component is charged, simultaneously measures the temperature, and inputs the necessary water. Next, the inlet is hermetically closed, and in a state where the pressure is reduced by the vacuum pump 83, the foundry sand is effectively cooled by evaporation of water and kneaded while adjusting moisture. The kneaded foundry sand for one mold thus kneaded is guided to the supply pipe 84 suspended from the dropping port of the kneader 49 when the charging hopper 51 of the casting sand charging device 50 is located at the supply position. And supplied directly to the charging hopper 51.
[0038]
When the shutter that opens and closes the opening formed in the upper frame 47 corresponding to the supply position is opened, the surplus remaining after the kneaded foundry sand is put into the lower casting frame 3 and the upper casting frame 2 for one mold Foundry sand is dropped onto the return conveyor 53 from the charging hopper 51. The return conveyor 53 is provided between a receiving position where surplus casting sand is dropped and a return stop position 85. The return stop position 85 is assigned a cooling stop position 20 several steps after the pouring stop position 56. ing. The return conveyor 53 is divided into a plurality of sections so as to be separated and conveyed for each excess foundry sand corresponding to one mold 21, and between the receiving position and the return stop position 85, the molding stop position 18 and the return stop position are returned. The same number of sections as the number of the stop positions 20 existing between the stop positions 85 are provided, and the sections are moved one by one in conjunction with the intermittent movement between the respective stop positions 20 of the casting frame circulating apparatus 1. Therefore, the excess casting sand remaining after molding one mold is dropped onto the one mold when the one mold is poured and then transported to the return stop position 85 to be cast sand for one mold. Mixed with.
[0039]
The casting method and the operation of the casting line according to the first embodiment configured as described above will be described. The turntable 5 is intermittently indexed and rotated one pitch at a predetermined time interval by a motor 12, and the plurality of upper and lower casting frames 2 and 3 continuously placed on the turntable 5 are closed loop-shaped transport paths 4. Are indexed and stopped sequentially at a plurality of stop positions 20 provided along the line. When the empty upper and lower casting frames 2 and 3 that are separated by the frame separating device 55 and returned to the rotating table 5 at the frame separating stop position 57 are stopped at the molding stop position 18, the lifting platform 31 of the transfer device 25 is moved. The lower claw 32 is lowered and grips the lower casting frame 3 positioned on the lower side, the lifting platform 31 is raised, the upper and lower casting frames 2 and 3 are taken out from the molding stop position 18, and the transfer platform 30 is placed at the loading / unloading position 24. It is moved horizontally up to the top. At the carry-in / out position 24, a carrier plate 38 to which a lower mold model 36 is attached is supported and indexed at one end of the swivel base 33, and the lifting / lowering base 31 descends to the carry-in / out position 24 and lower casting is performed. The frame 3 is placed on the carrier plate 38. The gripping claws 32 are lifted by releasing the lower casting frame 3, gripped by the upper casting frame 2 in the middle of lifting, and retracted to the rising end.
[0040]
The carrier plate 38 on which the swivel base 33 is turned 180 degrees and the lower casting frame 3 is placed is carried into the carrier plate exchange position 26 of the molding apparatus 17, and the carrier plate 37 to which the upper mold model 35 is attached is the swivel base. It is supported at the other end of 33 and is indexed to the loading / unloading position 24. The elevator 31 is lowered to the loading / unloading position 24 and the upper casting frame 2 is placed on the carrier plate 37. The table 41 is moved to the rising end by the cylinder device, the carrier plate 38 carried into the carrier plate replacement position 26 is placed on the table 41, and the upper end of the lower casting frame 3 on the carrier plate 38 is the upper frame 47. Contact the lower surface. The charging hopper 51 in which the kneading foundry sand for one mold is supplied from the kneading machine 49 at the supply position is moved to the input position by sliding the upper surface of the upper frame 47, and from the opening formed in the upper frame 47. The kneaded foundry sand is thrown into the lower casting frame 3 and then moved back to the supply position. After the casting sand is thrown in, the squeeze head 46 is lowered by the cylinder device 45, the kneaded casting sand thrown into the lower casting frame 3 is squeezed, and the lower mold 23 is formed. After the squeeze is completed, the squeeze head 46 is retracted to the ascending end, the table 41 is lowered to the descending end, and the carrier plate 38 formed with the lower mold 23 is supported on one end of the swivel 33.
[0041]
When the swivel base 33 is swiveled 180 degrees, the carrier plate 38 formed with the lower mold 23 is supported on one end of the swivel base 33 and carried to the loading / unloading position 24, and the upper casting frame 2 is placed on the upper mold. The carrier plate 37 to which the model 35 is attached is supported on the other end of the swivel base 33 and is carried into the carrier plate exchange position 26 of the molding apparatus 17. The elevator 31 is lowered to the loading / unloading position 24, the gripping claws 32 are lifted by gripping the lower casting frame 3, and the lower mold 23 is released from the lower mold model 36. When the transfer table 30 is moved to a position facing the reversing device 28, the lower mold 23 held by the gripping claws 32 is sandwiched on both sides by the sandwiching bodies 34 of the reversing device 28. The lower mold 23 is inverted by being rotated 180 degrees. The inverted lower mold 23 is gripped by the gripping claws 32, the clamping body 34 is opened, and returned to the transfer device 25. The transfer table 30 is moved above the molding stop position 18, the lifting table 31 is lowered, the lower mold 23 is fitted on the rotating table 5, and the holes drilled in the bottom surface of the lower casting frame 3 are fitted to the pins. It is placed while positioning, and after the placement, the gripping claws 32 are opened, and the lifting platform 31 is raised. The core is assembled into the lower mold 23 placed on the turntable 5 at the molding stop position 18 and the core is stored.
[0042]
The carrier plate 37 to which the upper mold model 35 is attached is carried into the carrier plate replacement position 26 by the turning of the swivel base 33 and placed on the rising table 41, in the same manner as the molding of the lower mold 23 described above. The upper mold 22 is formed. After the molding, the carrier plate 37 on which the upper mold 22 is molded is supported by the other end of the swivel base 33 and carried out to the loading / unloading position 24 by turning the swivel base 33. The elevator 31 is lowered to the loading / unloading position 24, the gripping claws 32 are lifted by gripping the upper casting frame 2, and the upper mold 22 is released from the upper mold model 35. The transfer table 30 is moved above the molding stop position 18, the elevator table 31 is lowered, and the upper mold 22 is cast onto the lower mold 23 to form the mold 21.
[0043]
Each time a predetermined time elapses, the turntable 5 is intermittently indexed and rotated by one pitch by the motor 12, and the mold 21 is sequentially formed on the turntable 5 at the molding stop position 18, and sequentially at the pouring stop position 56. It is conveyed and poured by the pouring device 54. The poured mold 21 is cooled while passing through a plurality of cooling stop positions 58 provided up to the frame spreading stop position 57. The cooled mold 21 is separated by a frame separation device 55 at a frame separation stop position 57, the upper and lower casting frames 2 and 3 are removed and placed in the tray 59, and the empty upper and lower casting frames 2 and 3 are stopped. At position 57, it is returned to the turntable 5. The cast product is taken out from the mold 21 separated from the frame at the product take-out position 61, and the foundry sand is removed by the sand dropping rotary brush to be separated from the foundry sand. The recovered foundry sand is accommodated in the tray 59 and conveyed, crushed at the dama crushing position 63, sieved at the foreign substance removal position 64 to remove foreign substances, and magnetically selected at the blending position 65.
[0044]
At the blending position 65, the type of mold currently used is read from the memory, and the weight of the recovered foundry sand is calculated from the weight input from the weigh scale 67. The blending amount of each supplementary component to be blended per 1 kg of the recovered foundry sand is read from Table 78, and this is multiplied by the weight of the recovered foundry sand to calculate each supplemental component and blending amount to be blended into the recovered foundry sand. Is done. Each shutter 71-73 of each supplement component tank 68-70 containing each supplement component to be blended is opened, the weight of each supplement component to be blended is measured by a weigh scale 74 and dropped into a weighing hopper 75, It is put into the tray 59 from the weighing hopper 75 and blended with the recovered foundry sand.
[0045]
The transport hopper 81 transfers the recovered foundry sand mixed with the replenishment component from the tray 59, and the transport rail 80 is self-propelled above the inlet of the kneading machine 49, and the recovered foundry sand mixed with the replenished component is kneaded. 49. The kneading machine 49 rehydrates the recovered foundry sand containing the replenishing components and kneads the water while adjusting and cooling the water. The kneaded foundry sand for one mold that has been kneaded is directly supplied from the kneader 49 to the charging hopper 51 located at the supply position of the casting sand charging device 50. After the kneaded foundry sand is thrown into the upper casting frame 2 following the lower casting frame 3, when the charging hopper 51 is retracted to the supply position, the shutter of the upper frame 47 is opened and remains after making one mold. Excess casting sand is dropped onto the return conveyor 53. The excess foundry sand is conveyed to the return stop position 85 by the return conveyor 53 and mixed with the foundry sand for one mold.
[0046]
In the above-described embodiment, the single turntable 5 is rotatably mounted on the annular rail 7 to configure the cast frame circulation device 1. However, the circular shape, the elliptical shape, and the corner portion have an R shape. A plurality of transport carts are mounted on a pair of rails laid in a loop shape such as a polygon so that they can roll with wheels, and each transport cart is connected by a pivot pin and indexed to the pushing position. The conveying cart is pushed one pitch at a time by the indexing device, and the plurality of upper and lower casting frames 2 and 3 respectively placed on the conveying cart are sequentially and intermittently arranged at a plurality of stop positions provided along the closed loop conveying path. You may make it convey to. In addition, a plurality of transport carts may be sequentially pushed forward from a transport cart that has been pushed one pitch by the indexing device at the pushing position without being connected by a pivot pin. Good.
[0047]
Next, a second embodiment of the present invention will be described with reference to FIG. In the first embodiment, the casting frame circulation device is configured by a single conveying device, and a plurality of upper and lower casting frames 2 and 3 are conveyed together one pitch at a time along a closed-loop conveying path. In the second embodiment, the casting frame circulation device is constituted by a plurality of conveying devices, and only the point that the plurality of upper and lower casting frames 2 and 3 are conveyed by the respective conveying devices in the respective sections of the closed loop conveying path. Since the other configurations are the same as in the first embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof will be omitted. Differences will be mainly described.
[0048]
As shown in FIG. 8, the closed-loop casting frame circulation device 87 provides a first conveyance device 88 in which the molding device 17 is arranged, a second conveyance device 89 in which the pouring device 54 is arranged, and a cooling stop position. The third conveying device 90 and the fourth conveying device 91 in which the frame separating device 55 is arranged are configured. Empty upper and lower casting frames 2 and 3 placed on the roller conveyor 92 of the first conveying device 88 and sandwiched between the casting frame feeding device 93 and the cushion device 94 and transferred by one pitch at each stop position 20 stop molding. At position 18, it is carried into the molding apparatus 17, and the lower mold 23 and the upper mold 22 are alternately molded and returned onto the roller conveyor 92. Reference numeral 95 denotes a casting frame reversing device for reversing the lower mold 23 up and down, so that the lower casting mold 23 carried into the casting frame reversing device 95 from the roller conveyor 92 is reversed by a 180-degree rotation of the drum and carried onto the roller conveyor 92. One pitch is transferred and conveyed to the carriage set device 96. The carriage set device 96 is provided with a lifting platform that is lifted and lowered by a cylinder device. The lifting platform is raised only when the lower mold 23 is carried into the cart set device 96, and is raised by placing the transport cart 97 put into the cart set device 96, so that the lower mold 23 supported by the roller conveyor 92 is moved. It is supported on the transport carriage 97 and slightly separated from the roller conveyor 92. A rail continuous with the raised rail on the elevator platform is provided in parallel with the roller conveyor 92, and after the carriage set device 96, the lower mold 23 is transferred in a state of being placed on the conveyance carriage 97 traveling on the rail. Then, the upper mold 22 is transferred on the roller conveyor 92. The lower mold 23 is reversed by the casting frame reversing device 95 and placed on the transport carriage 97 put into the cart setting device 96, and necessary operations such as core insertion are performed. A casting frame aligning device 98 is disposed adjacent to the cart setting device 96, and the casting mold aligning device 98 aligns the upper mold 22 with the lower mold 23 to form the casting mold 21.
[0049]
The conveyance carriage 97 on which the mold 21 is placed is turned 90 degrees by the first casting frame direction changing device 99 and is sandwiched between the casting frame feeding device 100 and the cushion device 101 constituting the second conveying device 89 so as to be on the rail. Are transferred one pitch at a time to each stop position 20, and are poured by the pouring device 54 at the pouring stop position 56. The transport carriage 97 on which the poured mold 21 is placed is turned 90 degrees by the second cast-frame direction changing device 102 and is sandwiched between the cast-frame feeding device 103 and the cushion device 104 constituting the third transport device 90. Then, each cooling stop position 58 is transferred by one pitch on the rail in the opposite direction parallel to the conveying direction of the roller conveyor 92, and the casting is cooled during that time. When the transport cart 97 on which the poured mold 21 is placed is loaded onto the cart separation device 105, the transport cart 97 is lowered leaving the mold 21 on the roller conveyor, and the mold 21 is moved to the fourth transport device 91. Are moved between the roller conveyors 106 and the cushion device 107, transferred to the respective stop positions 20 by one pitch, and carried into the frame separating device 55, and the mold 21 is moved from the upper and lower casting frames 2, 3. Separated and placed in tray 59 on conveyor 60. The superposed upper and lower casting frames 2 and 3 are separated into an upper casting frame 2 and a lower casting frame 3 by a casting frame separating device 108 and are carried into a roller conveyor 92.
[0050]
The transport carriage 97 lowered by the carriage separating apparatus 105 is placed on the lower rail and transferred to the carriage return point 109. A lift platform that is lifted and lowered by the cylinder device is disposed at the carriage return point 109. The lift platform is lowered when the transport cart 97 is carried in, and the transport cart 97 is supported on the roller conveyor. The transport carriage 97 supported on the roller conveyor is put into the carriage set device 96 by the carriage feeder 110.
[0051]
In the closed-loop casting frame circulation device 87 configured as described above, the kneader 49 is juxtaposed in the vicinity of the molding device 17, and the conveyance rail 80 is laid between the blending position 65 and the inlet of the kneader 49. In addition, a transport hopper 81 is mounted on the transport rail 80 so as to be capable of self-propelling. The transport hopper 81 transfers the recovered foundry sand containing the replenishment component in the required amount from the tray 59 at the blending position 65, and the transport rail 80 is self-propelled to above the inlet of the kneader 49, and the replenishment component is blended. The recovered foundry sand is put into a kneader 49. The kneader 49 kneads the recovered foundry sand mixed with the replenishing component while adjusting the moisture content. The kneaded foundry sand for one mold that has been kneaded is directly supplied to the input hopper of the foundry sand input device of the molding apparatus 17.
[0052]
The surplus casting sand remaining after the kneading foundry sand is put into the lower casting frame 3 and the upper casting mold 2 for one mold is dropped onto the return conveyor 53 from the charging hopper. The return conveyor 53 is provided between a receiving position where surplus casting sand is dropped and a return stop position 85 subsequent to the pouring stop position 56, and the return conveyor 53 corresponds to an excess casting corresponding to one mold 21. It is divided into a plurality of sections so as to be transported separately for each sand, and the number of stop positions 20 existing between the molding stop position 18 and the return stop position 85 is between the receiving position and the return stop position 85. The same number of sections are provided, and the sections are moved one by one in conjunction with the movement of the third conveying device 90 of the casting frame circulation device 87 by one pitch. Therefore, when the one casting mold is cast, the surplus casting sand remaining when the one casting mold is poured and then transferred to the return stop position 85 is dropped on the one casting mold and is completely cast on one casting mold. Mixed with.
[0053]
In the above-described embodiment, a necessary amount of supplemental components are blended in the recovered casting sand for one mold. However, the recovered casting sand for a fixed number of molds (for example, a few) at the blending position 65. It is also possible to add a necessary amount of replenishing components, add them to the kneader 49 and knead them. In this case, the surplus casting sand remaining in the charging hopper 51 after molding a small number of the fixed number of molds 21 is mixed with the recovered foundry sand forming the small number of the fixed number of molds 21 at the blending position 65. May be provided between the receiving position and the blending position 65.
[0054]
In the above embodiment, the blending amount of each supplementary component to be blended per unit amount of the recovered foundry sand is stored as the blending weight of each supplementary component to be blended per unit weight of the recovered foundry sand, for example, per kg. However, the blending weight or the blending volume of each supplementary component to be blended per mold formed by the recovered foundry sand may be stored for each type of mold.
[Brief description of the drawings]
FIG. 1 is a diagram showing a casting line according to the first embodiment.
FIG. 2 is a view taken along the line AA in FIG.
3 is a BB arrow view of FIG.
4 is a cross-sectional view taken along the line CC in FIG. 1;
FIG. 5 is an explanatory diagram in which a replenishing component is blended with recovered foundry sand and charged into a kneader.
FIG. 6 is a view showing a table in which replenishing components and amounts to be blended in the recovered foundry sand are stored for each mold.
FIG. 7 is a diagram showing a program for blending a required amount of supplemental components into recovered foundry sand.
FIG. 8 is a view showing a casting line according to a second embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1,87 ... Cast-frame circulation apparatus, 2 ... Upper cast-frame, 3 ... Lower cast-frame, 4 ... Conveyance path, 5 ... Rotary table, 7 ... Ring rail, 15 ... Drive apparatus, 17 ... Molding apparatus, 18 ... Molding Stop position, 19 ... Casting frame conveying device, 20 ... Stop position, 21 ... Mold, 22 ... Upper mold, 23 ... Lower mold, 24 ... Loading / unloading position, 25 ... Transfer device, 26 ... Carrier plate replacement position, 27 ... Loading Dispensing device, 28 ... reversing device, 33 ... swivel base, 35, 36 ... model for upper and lower molds, 37, 38 ... carrier plate, 40 ... device main body, 41 ... table, 46 ... squeeze head, 47 ... overlay frame, DESCRIPTION OF SYMBOLS 49 ... Kneading machine, 51 ... Feeding hopper, 53 ... Return conveyor, 54 ... Pouring device, 55 ... Frame pouring device, 56 ... Pouring pouring stop position, 57 ... Frame pouring stop position, 58 ... Cooling stop position, 59 ... Tray , 60 ... conveyor, 61 ... product removal position, 2 ... Manipulator, 63 ... Dama crushing position, 64 ... Foreign substance removal position, 65 ... Compounding position, 66 ... Compounding device, 67, 74 ... Weigh scale, 68-70 ... Replenishing component tank, 71-73, 82 ... Shutter, 75 DESCRIPTION OF SYMBOLS ... Metering hopper, 77 ... Computer, 78 ... Table, 79 ... Mixing program, 80 ... Conveying rail, 81 ... Conveying hopper, supply pipe, 85 ... Return stop position, 88-91 ... 1st-4th conveying apparatus.

Claims (9)

複数の鋳枠を閉ループ状の鋳枠循環装置により複数の停止位置に搬送し、造型停止位置に搬送された空の鋳枠を造型装置に搬入し鋳物砂を投入して鋳型を造型し該鋳型を前記鋳枠循環装置に戻し、前記鋳型に注湯停止位置で注湯し、注湯後冷却停止位置を経由して枠ばらし停止位置に搬送された鋳型を枠ばらしすることを繰り返す鋳造方法において、前記枠ばらしされた鋳型から鋳物製品を分離された鋳物砂を鋳枠毎に分離回収し、他の鋳枠から枠ばらしされた鋳型から分離回収された鋳物砂と混合することなく必要量の補充成分を配合して混練することを特徴とする鋳造方法。A plurality of casting frames are transported to a plurality of stop positions by a closed-loop casting frame circulation device, empty casting frames transported to the molding stop position are carried into a molding device, casting sand is poured into the mold, and the mold is molded. In the casting method of repeatedly returning the casting mold to the casting frame circulation device, pouring the mold at the pouring stop position and pouring the mold that has been conveyed to the frame spreading stop position via the cooling stop position after pouring The casting sand from which the casting product is separated from the mold separated from the frame is separated and recovered for each casting frame, and the required amount of the casting sand is separated from the casting mold separated from the other casting frame without mixing with the foundry sand. A casting method comprising mixing and kneading supplemental components. 複数の鋳枠を閉ループ状の鋳枠循環装置により複数の停止位置に搬送し、造型停止位置に搬送された空の鋳枠を造型装置に搬入し鋳物砂を投入して鋳型を造型し該鋳型を前記鋳枠循環装置に戻し、前記鋳型に注湯停止位置で注湯し、注湯後冷却停止位置を経由して枠ばらし停止位置に搬送された鋳型を枠ばらしすることを繰り返す鋳造方法において、前記枠ばらしされた1個または少数一定個数の既知種類の鋳型から鋳物製品を分離された回収鋳物砂に必要量の補充成分を配合する配合工程と、該補充成分を配合された鋳物砂を混練機で水分調整しながら混練する工程と、該混練された混練鋳物砂を前記造型装置において前記空の鋳枠内に投入する工程と、を備えたことを特徴とする鋳造方法。A plurality of casting frames are transported to a plurality of stop positions by a closed-loop casting frame circulation device, empty casting frames transported to the molding stop position are carried into a molding device, casting sand is poured into the mold, and the mold is molded. In the casting method of repeatedly returning the casting mold to the casting frame circulation device, pouring the mold at the pouring stop position and pouring the mold that has been conveyed to the frame spreading stop position via the cooling stop position after pouring A blending step of blending a required amount of replenishment components into the recovered foundry sand obtained by separating a cast product from one or a fixed number of known types of molds separated from the frame, and foundry sand blended with the replenishment components A casting method comprising: a step of kneading while adjusting moisture with a kneader; and a step of feeding the kneaded kneaded foundry sand into the empty casting frame in the molding apparatus. 請求項2において、前記配合工程は、前記回収鋳物砂の単位量当たりに配合すべき補充成分および配合量を鋳型の種類別に記憶手段に記憶する工程と、前記配合工程に搬送された回収鋳物砂に配合すべき前記補充成分および配合量を前記記憶手段に鋳型の種類別に記憶された回収鋳物砂の単位量当たりに配合すべき補充成分および配合量に基づいて求める工程と、を備えたことを特徴とする鋳造方法。3. The compounding process according to claim 2, wherein the compounding step includes a step of storing a supplementary component to be compounded per unit amount of the recovered foundry sand and a compounded amount in a storage means for each type of mold, and the recovered foundry sand conveyed to the compounding step. And a step of obtaining the replenishment component and the amount to be blended based on the replenishment component and the blend amount to be blended per unit amount of the recovered foundry sand stored for each type of mold in the storage means. Casting method characterized. 請求項2または3において、前記配合工程は、1個の既知種類の鋳型から鋳物製品を分離された回収鋳物砂に必要量の補充成分を配合し、前記混練機によって混練された一鋳型分の混練砂であって前記造型装置において該一鋳型用の鋳枠内に投入されなかった余剰混練鋳物砂の全量を注湯後に該一鋳型用の鋳物砂と混合することを特徴とする鋳造方法。4. The blending step according to claim 2, wherein the blending step blends a necessary amount of a supplemental component into the recovered foundry sand obtained by separating a cast product from one known type of mold and is kneaded by the kneader. A casting method, characterized in that the entire amount of surplus kneaded foundry sand that has not been put into the casting mold for one mold in the molding apparatus is mixed with the foundry sand for one mold after pouring. 複数の鋳枠を複数の停止位置に搬送する閉ループ状の鋳枠循環装置と、造型停止位置に停止された空の鋳枠が搬入され該空の鋳枠に鋳物砂を鋳物砂投入装置によって投入して鋳型を造型し該鋳型を前記鋳枠循環装置に搬出する造型装置と、鋳型に注湯停止位置で注湯する注湯装置と、注湯後に冷却停止位置を経由して枠ばらし停止位置に停止された鋳型が搬入されて枠ばらしを行った後に空の鋳枠を前記鋳枠循環装置に搬出する枠ばらし装置とを備えた鋳造装置において、前記枠ばらし装置によって枠ばらしされた1個または少数一定個数の既知種類の鋳型から鋳物製品が分離された回収鋳物砂に必要量の補充成分を配合する配合装置と、該補充成分を配合された鋳物砂が投入され水分調整しながら混練する混練機と、該混練機により混練された混練鋳物砂を前記造型装置の鋳物砂投入装置に供給する供給手段と、を備えたことを特徴とする鋳造ライン。Closed-loop-shaped cast frame circulation device that transports multiple cast frames to multiple stop positions, and empty cast frames stopped at the molding stop position are carried in, and cast sand is thrown into the empty cast frames by a foundry sand throwing device. Then, the mold is molded and the mold is carried out to the casting frame circulation device, the pouring device for pouring the mold at the pouring stop position, and the pouring stop position after pouring through the cooling stop position. In a casting apparatus comprising a frame separating device for carrying out an empty casting frame after the stopped mold is carried in and carrying out the frame separation, the piece is separated by the frame separating device. Alternatively, a blending device for blending the required amount of supplementary components into the recovered foundry sand from which a casting product has been separated from a small number of known types of molds, and the foundry sand blended with the supplemental components are charged and kneaded while adjusting moisture. Kneader and kneaded by the kneader Casting line kneading molding sand characterized by comprising a supply means for supplying the molding sand dosing device of the molding apparatus. 請求項5において、前記配合装置は、前記回収鋳物砂の単位量当たりに配合すべき補充成分および配合量を鋳型の種類別に記憶する記憶手段と、前記配合装置により回収鋳物砂に配合すべき補充成分および配合量を前記記憶手段に鋳型の種類別に記憶された回収鋳物砂の単位量当たりに配合すべき補充成分および配合量に基づいて求める手段と、を備えたことを特徴とする鋳造ライン。6. The blending device according to claim 5, wherein the blending device stores a replenishment component to be blended per unit amount of the recovered foundry sand and a blending amount for each type of mold, and a refill to be blended into the recovered foundry sand by the blending device. A casting line comprising: means for obtaining the component and blending amount based on the supplementary component and blending amount to be blended per unit amount of the recovered foundry sand stored in the storage unit for each type of mold. 請求項6において、前記配合装置は前記回収鋳物砂の重量を計測する計量手段を備えたことを特徴とする鋳造ライン。The casting line according to claim 6, wherein the blending device includes a weighing unit that measures the weight of the recovered foundry sand. 請求項5乃至7のいずれか1項において、前記配合装置は、1個の既知種類の鋳型から鋳物製品を分離された回収鋳物砂に必要量の補充成分を配合し、前記混練機は前記造型装置の近傍に配設され、前記供給手段は一鋳型分の混練砂を前記混練機から前記造型装置の鋳物砂投入装置に直接供給することを特徴とする鋳造ライン。The blending device according to any one of claims 5 to 7, wherein the blending device blends a necessary amount of a supplemental component into the recovered foundry sand obtained by separating a cast product from a single known type of mold, and the kneader is configured as the molding machine. A casting line, which is disposed in the vicinity of the apparatus, wherein the supplying means directly supplies kneaded sand for one mold from the kneader to the casting sand charging apparatus of the molding apparatus. 請求項5乃至8のいずれか1項において、前記造型装置を前記閉ループ状の鋳枠循環装置の内側に配置したことを特徴とする鋳造ライン。9. The casting line according to any one of claims 5 to 8, wherein the molding apparatus is disposed inside the closed-loop casting frame circulation device.
JP2003190384A 2003-07-02 2003-07-02 Casting method and casting line Pending JP2005021944A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009241149A (en) * 2008-02-26 2009-10-22 Sintokogio Ltd Treatment method and treatment system of molding sand
KR101829430B1 (en) * 2017-06-13 2018-02-19 한국생산기술연구원 Closed-loop sand reclaim type casting manufacturing system
CN108031794A (en) * 2018-01-18 2018-05-15 宜兴市环宇轴瓦制造有限公司 Cement rotary kiln supporting-roller shaft lining tile casting device and casting method
KR20180135535A (en) * 2017-06-13 2018-12-21 한국생산기술연구원 Regenerative apparatus for waste molding sand and closed-loop sand reclaim type casting manufacturing system using of the same
CN114273621A (en) * 2021-12-27 2022-04-05 徐永上 Lost foam casting sand box
CN114570894A (en) * 2022-04-06 2022-06-03 北京航星机器制造有限公司 Aluminum alloy casting workshop and production scheduling method thereof
CN114951546A (en) * 2022-05-30 2022-08-30 重庆林洲机械制造有限公司 Automatic sand filling method of continuous sand mixer

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009241149A (en) * 2008-02-26 2009-10-22 Sintokogio Ltd Treatment method and treatment system of molding sand
KR101829430B1 (en) * 2017-06-13 2018-02-19 한국생산기술연구원 Closed-loop sand reclaim type casting manufacturing system
KR20180135535A (en) * 2017-06-13 2018-12-21 한국생산기술연구원 Regenerative apparatus for waste molding sand and closed-loop sand reclaim type casting manufacturing system using of the same
KR101950029B1 (en) * 2017-06-13 2019-04-29 한국생산기술연구원 Regenerative apparatus for waste molding sand and closed-loop sand reclaim type casting manufacturing system using of the same
CN108031794A (en) * 2018-01-18 2018-05-15 宜兴市环宇轴瓦制造有限公司 Cement rotary kiln supporting-roller shaft lining tile casting device and casting method
CN114273621A (en) * 2021-12-27 2022-04-05 徐永上 Lost foam casting sand box
CN114570894A (en) * 2022-04-06 2022-06-03 北京航星机器制造有限公司 Aluminum alloy casting workshop and production scheduling method thereof
CN114570894B (en) * 2022-04-06 2023-11-07 北京航星机器制造有限公司 Aluminum alloy casting workshop and production scheduling method thereof
CN114951546A (en) * 2022-05-30 2022-08-30 重庆林洲机械制造有限公司 Automatic sand filling method of continuous sand mixer

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