JPH09216044A - Closed type molten metal supplying apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily change molten metal supplying quantity in a simple structure, to improve the accuracy of the molten metal supplying quantity and to prevent the dripping during shifting a ladle, the mixture of oxide and the entrapment of the air at the time of pouring the molten metal. SOLUTION: In an apparatus for supplying the molten metal of aluminum alloy, etc., into an injection sleeve, the ladle providing a suction hole dipped into a melting and holding furnace and an opening/closing device 40 composed of a valve rod and a valve rod cylinder, a ladle hanging, supporting and elevating/lowering means 60, an introducing tube 28 introduced from the ladle into the injection sleeve at the bottom part and a gas pouring means, are provided. Further, a partition wall 20e is arranged at the intermediate part of a ladle body outer cylinder 20A and an inner cylinder 20B penetrating the partition wall is arranged so as to be slidable to the vertical direction at the center part of the partition wall, and upper chamber 200 having a fixed vol. at the upper part of the partition wall and a lower chamber 20L changable to the vol. at the lower part of the partition wall, are formed. The gas pouring holes are arranged to both chambers and connected with the gas pouring means, and an elevating/lowering means of an inner cylinder is provided, and the spouting side of the introducing tube is parallel inclined downward with the introducing tube.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、アルミニウム合金
またはマグネシウム合金などの溶湯をダイカストマシン
などの成形装置の射出スリーブへ給湯する密閉式給湯装
置に係り、特に給湯精度の向上と溶湯に溶湯酸化物が混
入しないようにする酸化物混入防止対策に配慮した密閉
式給湯装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a closed type hot water supply device for supplying a molten metal such as an aluminum alloy or a magnesium alloy to an injection sleeve of a molding apparatus such as a die casting machine, and more particularly to improving the accuracy of hot water supply and a molten oxide for the molten metal. The present invention relates to a closed-type hot water supply device in consideration of measures for preventing oxides from being mixed in.

【０００２】[0002]

【従来の技術】従来、ダイカストマシンの射出スリーブ
へアルミニウム合金やマグネシウム合金などの溶湯を給
湯するには、従来、図６に示すように、溶解保持炉１０
内の溶湯を酌み取ったラドル２０を機械的機構を使用し
て上昇、または円弧状軌跡を描きながら横移動して傾斜
した射出スリーブ２００の位置まで移動し、しかる後、
ラドル２０内の溶湯を射出スリーブ内へ注湯するラドル
反転方式が採用されていた。また、図７に示すような上
部に蓋２０ａを有し底部に開口部（吸入口２０ｃ）を備
え、蓋２０ａに空気抜き２０ｄを有する密閉式でないラ
ドル２０を溶解保持炉１０内へ浸漬し、底部の開口部２
０ｃよりラドル２０内へ溶湯を侵入させた後に開口部２
０ｃを閉塞した後、傾斜した射出スリーブ２００の位置
までラドル２０を移動し、射出スリーブ２００の軸線に
合わせてラドル２０を傾斜しつつラドル底部を射出スリ
ーブ２００内へ装入してから、底部の開口部２０ｃを閉
塞状態から開放状態にしてラドル内部の溶湯を自然落下
させて射出スリーブ２００内へ供給する（給湯する）方
法も採用されていた。この方式は底抜きラドル方式と呼
ばれている。2. Description of the Related Art Conventionally, in order to supply a molten metal such as an aluminum alloy or a magnesium alloy to an injection sleeve of a die casting machine, conventionally, as shown in FIG.
Using a mechanical mechanism, the ladle 20 that has taken out the molten metal inside rises or moves laterally while drawing an arcuate locus to move to the position of the inclined injection sleeve 200, and then,
The ladle inversion method of pouring the molten metal in the ladle 20 into the injection sleeve has been adopted. Further, as shown in FIG. 7, a lid 20a is provided on the top and an opening (suction port 20c) is provided on the bottom, and an unsealed ladle 20 having an air vent 20d on the lid 20a is dipped into the melting and holding furnace 10 to form the bottom. Opening 2
After the molten metal has penetrated into the ladle 20 from 0c, the opening 2
After closing 0c, the ladle 20 is moved to the position of the inclined injection sleeve 200, and while the ladle 20 is inclined along the axis of the injection sleeve 200 while the bottom of the ladle is inserted into the injection sleeve 200, A method has also been employed in which the opening 20c is changed from the closed state to the open state, and the molten metal inside the ladle is naturally dropped and supplied (supplied with hot water) into the injection sleeve 200. This method is called the bottomed ladle method.

【０００３】[0003]

【発明が解決しようとする課題】しかしながら、上述の
ラドル反転方式や底抜きラドル方式のいずれにおいて
も、射出スリーブへの注湯口（ラドルの吐出口）は、溶
湯をラドル内へ入れる場合にラドル本体を溶解保持炉内
へ浸漬するため、ラドル内部に溶湯が入るだけでなくラ
ドルの外周に溶湯が付着し、ラドルを射出スリーブの位
置まで移動し、その後の注湯動作中にラドル外周に付着
した溶湯と空気中の酸素とが反応して酸化物を生成し、
かつ、これが注湯中に滴下してラドル内部の溶湯ととも
に射出スリーブ内へ落下することとなる。したがって、
ダイカスト成形後の鋳造品にこの酸化物が混入して、品
質の低下を招くという問題があった。また、上述の底抜
きラドル方式では、開口部（吸入口２０ｃ）が底部中央
に下側に向かって開口しており、ラドル内への溶湯の取
り込み後の開閉装置のシールが不完全であるとき、射出
スリーブまでのラドルの移送時に溶湯の滴下が起こり、
危険であるばかりでなく作業環境を著しく汚染するとい
う問題があった。また溶解保持炉の溶湯液面が毎回の給
湯時に異なるとラドル２０内へ取り込まれる溶湯量が微
妙に異なり、毎回の注湯量にばらつきが生じることとな
り、その結果、射出スリーブへの給湯量にもばらつきが
生じるので給湯精度が低く、鋳造品品質を均一に保つこ
とができないという難点があった。さらに、上述のラド
ル（図６のラドル２０や図７のラドル２０）では、給湯
の初期に射出スリーブ内に落下する溶湯の落下高さが大
きく、大きな落下高さの際に周囲の空気の巻き込みを誘
発して鋳造品にブローホールなどの鋳造欠陥を生じる惧
れがあった。However, in any of the above-mentioned ladle inversion method and bottomed-out ladle method, the pouring port (ladle discharge port) to the injection sleeve is the ladle body when pouring the molten metal into the ladle. Since the molten metal is immersed in the melting and holding furnace, the molten metal not only enters the inside of the ladle but also adheres to the outer periphery of the ladle, moves the ladle to the position of the injection sleeve, and adheres to the outer periphery of the ladle during the subsequent pouring operation. The molten metal reacts with oxygen in the air to produce oxides,
In addition, this drops during pouring and drops into the injection sleeve together with the molten metal inside the ladle. Therefore,
There is a problem that this oxide is mixed in a cast product after die casting, which causes deterioration of quality. Further, in the above-mentioned bottomed ladle system, when the opening (suction port 20c) is opened downward in the center of the bottom and the seal of the switchgear after the molten metal is taken into the ladle is incomplete. , Dripping of molten metal occurs when transferring the ladle to the injection sleeve,
There is a problem that not only it is dangerous but also the work environment is significantly polluted. Further, if the molten metal surface of the melting and holding furnace is different each time the molten metal is supplied, the amount of molten metal taken into the ladle 20 will be slightly different, resulting in variations in the amount of molten metal poured each time, and as a result, the amount of molten metal supplied to the injection sleeve. Since there are variations, the hot water supply accuracy is low and the quality of the cast product cannot be kept uniform. Further, in the above-mentioned ladle (the ladle 20 in FIG. 6 and the ladle 20 in FIG. 7), the height of the molten metal that falls into the injection sleeve at the beginning of hot water supply is large, and the surrounding air is engulfed at the time of a large drop height. There is a risk of causing casting defects such as blowholes in the cast product by inducing the above.

【０００４】[0004]

【課題を解決するための手段】以上の課題を解決するた
めに、本発明（第１の発明）においては、アルミニウム
合金またはマグネシウム合金の溶湯をダイカストマシン
などの射出スリーブ内へ給湯する密閉式給湯装置であっ
て、溶湯の溶解保持炉内に浸漬されて懸架され中間部側
方に突出して設けた連通遮断自在な溶湯の吸入口を備え
るとともに該吸入口を連通遮断する弁棒と弁棒昇降用の
弁棒シリンダとからなる開閉装置をラドル本体の外部に
備えたラドルと、該ラドル懸垂支持昇降手段と、一端が
該ラドルの本体外筒底部に接続されたのち上部に向かっ
て湾曲し他端の溶湯吐出側が前記射出スリーブ内へ挿入
され該ラドル内の溶湯を前記射出スリーブへ注湯する導
管と、該ラドル内の溶湯液面を加圧する加圧ガスの注入
手段とを備えるとともに、該ラドル本体外筒の内部中間
部に水平板状の隔壁を設けるとともに、該隔壁の中心部
を貫通して該外筒の直径よりも小さな直径を有する内筒
を該隔壁の中心部上下方向に摺動自在に配設して、該隔
壁上部に区画された容量一定の溶湯上部室と該隔壁下部
に区画された容量可変自在な溶湯下部室とを形成し、該
溶湯上部室ならびに該溶湯下部室のそれぞれに加圧ガス
の注入孔を設けて前記加圧ガス注入手段と接続し、か
つ、該内筒の上下方向昇降手段を備え、前記導管の溶湯
吐出側は、下方に向かって傾斜させるとともに、前記ラ
ドル懸垂支持昇降手段の昇降方向を傾斜した導管と平行
に傾斜させた構成とした。また、第２の発明では、アル
ミニウム合金またはマグネシウム合金の溶湯をダイカス
トマシンなどの射出スリーブ内へ給湯する密閉式給湯装
置であって、溶湯の溶解保持炉内に浸漬されて懸架され
中間部側方に突出して設けた連通遮断自在な溶湯の吸入
口を備えるとともに該吸入口を連通遮断する弁棒と弁棒
昇降用の弁棒シリンダとからなる開閉装置をラドル本体
の外部に備えたラドルと、該ラドル懸垂支持昇降手段
と、一端が該ラドルの本体外筒底部に接続されたのち上
部に向かって湾曲し他端の溶湯吐出側が前記射出スリー
ブ内へ挿入され該ラドル内の溶湯を前記射出スリーブへ
注湯する導管と、該ラドル内の溶湯液面を加圧する加圧
ガスの注入手段とを備えるとともに、該ラドル本体外筒
の内部中間部に水平板状の隔壁を設けるとともに、該隔
壁の中心部透孔に嵌装され下方に突出した円筒管を有し
上部に水平フランジを備えた排出ノズルを該隔壁に着脱
自在に固着して、該隔壁上部に区画された容量一定の溶
湯上部室と該隔壁下部に区画された容量一定の溶湯下部
室とを形成し、該溶湯上部室ならびに該溶湯下部室のそ
れぞれに前記加圧ガス注入手段により注入される加圧ガ
スの注入孔を接続し、かつ、該内筒の上下方向昇降手段
を備え、前記導管の溶湯吐出側は、下方に向かって傾斜
させるとともに、前記ラドル懸垂支持昇降手段の昇降方
向を傾斜した導管と平行に傾斜させた構成とした。さら
に、第３の発明では、第１や第２の発明の密閉式給湯装
置において、ラドルの溶湯の吸入口を上方に開口した構
成とした。In order to solve the above problems, in the present invention (first invention), a closed type hot water supply for supplying molten metal of aluminum alloy or magnesium alloy into an injection sleeve of a die casting machine or the like. The apparatus is provided with a molten metal suction port which is immersed and suspended in a molten metal melting and holding furnace and protrudes to the side of an intermediate part, and which is capable of interrupting communication, and a valve rod and valve rod lifting / lowering the communication port. Equipped with an opening / closing device consisting of a valve rod cylinder for the outside of the ladle body, the ladle suspending / supporting elevating means, and one end connected to the bottom portion of the outer cylinder of the ladle body, and then curved upward. A melt discharge side of an end is inserted into the injection sleeve, and a conduit is provided for pouring the melt in the ladle to the injection sleeve; and a means for injecting a pressurized gas for pressurizing the melt surface in the ladle. In addition, a horizontal plate-shaped partition wall is provided in the inner middle portion of the outer cylinder of the ladle body, and an inner cylinder having a diameter smaller than the diameter of the outer cylinder is penetrated through the central portion of the partition wall. The molten metal upper chamber and the variable volume molten metal lower chamber, which are partitioned in the upper part of the partition wall and have a constant volume, and the variable volume, which are partitioned in the lower part of the partition wall, are formed so as to be slidable in the vertical direction. A pressurizing gas injection hole is provided in each of the molten metal lower chambers and connected to the pressurizing gas injection means, and a vertical elevating means for the inner cylinder is provided. The molten metal discharge side of the conduit is directed downward. The ladle suspension support elevating means is inclined in parallel with the inclined conduit. According to a second aspect of the present invention, there is provided a sealed hot water supply device for supplying a molten metal of an aluminum alloy or a magnesium alloy into an injection sleeve of a die casting machine or the like. A ladle provided with an opening / closing device provided outside the ladle body, which is provided with a suction port for molten metal which is provided so as to project and is capable of blocking communication, and which comprises a valve rod and a valve rod cylinder for lifting and lowering the communication port that shuts off the communication port. The ladle suspension supporting elevating / lowering means and one end thereof is connected to the bottom of the main body of the ladle and then curved upward, and the other end of the molten metal discharge side is inserted into the injection sleeve so that the molten metal in the ladle is injected into the injection sleeve. And a means for injecting a pressurized gas for pressurizing the surface of the molten metal in the ladle, and providing a horizontal plate-shaped partition wall in the inner middle portion of the outer cylinder of the ladle body. , A discharge nozzle having a cylindrical tube fitted in a through hole at the center of the partition wall and projecting downward and having a horizontal flange on the upper part is detachably fixed to the partition wall, and the volume divided by the upper part of the partition wall is constant. A molten metal upper chamber and a molten metal lower chamber having a constant volume partitioned below the partition wall, and a pressurized gas is injected into the molten metal upper chamber and the molten metal lower chamber by the pressurized gas injecting means. A hole is connected and a vertical elevating means for the inner cylinder is provided. The molten metal discharge side of the conduit is inclined downward, and the elevating direction of the ladle suspension support elevating means is parallel to the inclined conduit. The structure is inclined. Furthermore, in the third invention, in the closed type hot water supply apparatus of the first or second invention, the suction port for the molten metal of the ladle is opened upward.

【０００５】[0005]

【発明の実施の態様】本発明の密閉式給湯装置において
は、アルミニウム合金またはマグネシウム合金の溶湯を
ダイカストマシンなどの射出スリーブ内へ給湯する密閉
式給湯装置であって、溶湯の溶解保持炉内に浸漬されて
懸架され中間部側方に突出して設けた連通遮断自在な溶
湯の吸入口を備えるとともに該吸入口を連通遮断する弁
棒と弁棒昇降用の弁棒シリンダとからなる開閉装置をラ
ドル本体の外部に備えたラドルと、該ラドル懸垂支持昇
降手段と、一端が該ラドルの本体外筒底部に接続された
のち上部に向かって湾曲し他端の溶湯吐出側が前記射出
スリーブ内へ挿入され該ラドル内の溶湯を前記射出スリ
ーブへ注湯する導管と、該ラドル内の溶湯液面を加圧す
る加圧ガスの注入手段とを備えるとともに、該ラドル本
体外筒の内部中間部に水平板状の隔壁を設けるととも
に、該隔壁の中心部を貫通して該外筒の直径よりも小さ
な直径を有する内筒を該隔壁の中心部上下方向に摺動自
在に配設して、該隔壁上部に区画された容量一定の溶湯
上部室と該隔壁下部に区画された容量一定の溶湯下部室
とを形成し、該溶湯上部室ならびに該溶湯下部室のそれ
ぞれに加圧ガスの注入孔を設けて前記加圧ガス注入手段
と接続し、かつ、該内筒の上下方向昇降手段を備え、前
記導管の溶湯吐出側は、下方に向かって傾斜させるとと
もに、前記ラドル懸垂支持昇降手段の昇降方向を傾斜し
た導管と平行に傾斜させた構成としてある。BEST MODE FOR CARRYING OUT THE INVENTION The closed hot water supply apparatus of the present invention is a closed hot water supply apparatus for supplying molten metal of aluminum alloy or magnesium alloy into an injection sleeve of a die casting machine or the like, which is provided in a melting and holding furnace for molten metal. A ladle is provided with an opening / closing device that is provided with a molten metal suction port that is immersed and suspended, and that protrudes to the side of the intermediate portion and that is capable of blocking communication, and that also has a valve rod that shuts off the communication port and a valve rod cylinder for lifting the valve rod. A ladle provided outside the main body, the ladle suspension supporting elevating means, one end connected to the bottom of the outer cylinder of the main body of the ladle, and then curved upward, and the other end of the melt discharge side is inserted into the injection sleeve. A conduit for pouring the molten metal in the ladle to the injection sleeve and a means for injecting a pressurized gas for pressurizing the liquid surface of the molten metal in the ladle are provided, and the inner middle of the outer cylinder of the ladle body is provided. A horizontal plate-shaped partition is provided on the partition wall, and an inner cylinder penetrating the central part of the partition wall and having a diameter smaller than that of the outer cylinder is slidably arranged in the central part vertical direction of the partition wall. A molten metal upper chamber having a constant volume partitioned above the partition wall and a molten metal lower chamber having a fixed volume partitioned below the partition wall are formed, and a pressurized gas injection hole is provided in each of the molten metal upper chamber and the molten metal lower chamber. Is provided and connected to the pressurized gas injection means, and is provided with vertical moving means of the inner cylinder, the molten metal discharge side of the conduit is inclined downward, and the ladle suspension supporting lifting means is raised and lowered. It is configured to be inclined parallel to the conduit whose direction is inclined.

【０００６】すなわち、第１の発明では、外筒内部中間
部に水平板状の隔壁を設けこの隔壁の中央部透孔に、円
筒状の内筒を上下方向摺動自在に配設して、ラドル内を
溶湯容量一定の溶湯上部室と溶湯容量可変自在な溶湯下
部室に区画形成し、あらかじめ両室に不活性ガスを注入
した後、不活性ガスを封入し、ラドルを溶解保持炉に静
かに浸漬するととともに溶湯上部室の不活性ガスのみ大
気開放し、ラドル中間部側方に突出して設けた溶湯吸入
口より溶湯をラドル内に吸入して取り込む。ラドル内に
入った溶湯は最初溶湯下部室に入り、溶湯液面が上昇し
て内筒の管通路下端に達すると溶湯下部室に封入された
不活性ガスのために溶湯下部室の液面レベルを停止し、
その後溶湯液面は排出ノズルを上昇した後溶湯上部室を
充満することになる。また、第２の発明では、下方に突
出した円筒管を有し上部に水平フランジを備えた排出ノ
ズルをこの隔壁に取り付けることにより、第１の発明と
同様に、ラドル内を溶湯容量一定の溶湯上部室と溶湯容
量一定の溶湯下部室に区画形成し、ラドル内溶湯量を変
更するときには、必要に応じて長さの異なる排出ノズル
に取り替えることによって溶湯下部室の容量を変更す
る。このように、両発明とも、ラドル内に溶湯を取り込
む際には、ラドル本体を通過することなく、ラドル本体
の側方を上下方向に昇降自在な弁棒と弁棒昇降用の弁棒
シリンダとからなる開閉装置で吸入口を開閉するので、
従来の底抜きラドル方式であってラドルを密閉蓋で密閉
する底抜きラドル方式では、弁棒が密閉蓋を貫通するの
で弁棒と密閉蓋とのガスシールを考慮する必要がある
が、本発明においては弁棒が密閉蓋を貫通する構造にな
っていないので、ガスシールの必要がなく、簡便であ
る。That is, in the first aspect of the present invention, a horizontal plate-shaped partition wall is provided in the middle portion of the outer cylinder, and a cylindrical inner cylinder is vertically slidably disposed in the central through hole of the partition wall. The inside of the ladle is divided into a molten metal upper chamber with a constant molten metal volume and a molten metal lower chamber with variable molten metal volume, and after injecting an inert gas into both chambers in advance, the inert gas is sealed and the ladle is quietly placed in the melting and holding furnace. At the same time, the molten metal is opened to the atmosphere, and only the inert gas in the upper chamber of the molten metal is exposed to the atmosphere, and the molten metal is sucked into the ladle through the molten metal suction port provided to the side of the middle portion of the ladle. The molten metal entered into the ladle first enters the molten metal lower chamber, and when the molten metal liquid level rises and reaches the lower end of the pipe passage of the inner cylinder, the level of the molten metal lower chamber becomes due to the inert gas enclosed in the molten metal lower chamber. Stop,
After that, the liquid surface of the molten metal fills the upper chamber of the molten metal after moving up the discharge nozzle. Further, in the second invention, a discharge nozzle having a cylindrical tube projecting downward and having a horizontal flange on the upper part is attached to this partition wall, so that the melt in the ladle has a constant melt volume as in the first invention. When the molten metal in the ladle is divided into the upper chamber and the molten metal lower chamber having a constant molten metal volume and the amount of molten metal in the ladle is changed, the capacity of the molten metal lower chamber is changed by replacing the molten metal with a discharge nozzle having a different length. Thus, in both inventions, when the molten metal is taken into the ladle, the valve rod and the valve rod cylinder for raising and lowering the lateral side of the ladle body can be vertically moved without passing through the ladle body. Because the opening and closing device consists of opening and closing the inlet,
In the conventional bottomed ladle system in which the ladle is sealed with a sealing lid, the valve rod penetrates the sealing lid, so it is necessary to consider a gas seal between the valve rod and the sealing lid. In the above, since the valve rod does not have a structure that penetrates the sealing lid, there is no need for a gas seal, which is simple.

【０００７】ラドル内への溶湯の取り込みがすべて完了
した後、溶湯上部室のガス通路も溶湯下部室と同様に閉
じたあと、ラドル懸垂支持昇降手段を操作してラドルを
移送しラドルに連結された導管吐出側先端を射出スリー
ブ底部のプランジャチップ上面近くまで挿入し、加圧し
た不活性ガスをラドル内の溶湯下部室や、あるいは溶湯
下部室と溶湯上部室の両方に吹き込んで、ラドル内溶湯
液面を加圧してラドル内の溶湯の全量を導管を経由して
射出スリーブ内へ給湯する。このようにして、射出スリ
ーブ内へ供給する給湯量を毎回一定の値に保持し、給湯
量のばらつきを出来るだけ少なくして給湯精度を高める
ようにした。さらに、第３の発明では、ラドルの溶湯吸
入口を上方に開口した構成としたので、たとえ経年変化
による開閉装置の閉塞時のシールが少々不完全であって
も、開口部が上向きであるから溶湯が漏れにくくラドル
の射出スリーブへの移動中におけるラドル内溶湯の滴下
を最小限に食い止めることが出来る。また、ラドルから
射出スリーブへの溶湯の給湯に際しては、導管の吐出側
先端を射出スリーブ内底面まで挿入して静止した後、給
湯を開始し、給湯の進行に伴なう該射出スリーブ内の溶
湯液面上昇により該導管吐出側先端部の溶湯浸漬深さが
所定の値に達したとき該所定の溶湯浸漬深さを一定に維
持するように溶湯液面の上昇と同一速度で該導管と一体
的にラドルを上昇させつつ給湯するようにすれば、溶湯
の落下に伴なう飛び撥ねや飛沫の発生が防止できるので
空気の溶湯内巻き込みを防止し、かつ、射出スリーブ内
の導管溶湯浸漬深さが一定の状態で給湯が進行するた
め、導管外側に付着する溶湯量が毎回一定しており、溶
湯の酸化物皮膜の生成状況を均一化できる。したがっ
て、本発明の密閉式給湯装置では、従来技術に比べて、
毎回の給湯条件が均一化されるので給湯精度が高く、ラ
ドル移送中の溶湯の滴下が少なく、かつ溶湯酸化物の混
入も少ないので鋳造品品質が良好に維持できる。After all of the molten metal has been taken into the ladle, the gas passage of the molten metal upper chamber is closed in the same manner as the molten metal lower chamber, and then the ladle suspension supporting elevating means is operated to transfer the ladle and connect it to the ladle. Insert the tip of the conduit discharge side up to the top of the plunger tip at the bottom of the injection sleeve, and blow pressurized inert gas into the molten metal lower chamber or both the molten metal lower chamber and molten metal upper chamber to melt the molten metal in the ladle. The liquid surface is pressurized to supply the entire amount of the molten metal in the ladle into the injection sleeve via the conduit. In this way, the amount of hot water supplied to the injection sleeve is maintained at a constant value every time, and the variation in the amount of hot water supplied is minimized to improve the accuracy of hot water supply. Further, in the third invention, since the molten metal suction port of the ladle is opened upward, the opening is upward even if the seal when the switchgear is closed due to aging is slightly incomplete. The molten metal is unlikely to leak and the dripping of the molten metal in the ladle during movement of the ladle to the injection sleeve can be minimized. When supplying molten metal from the ladle to the injection sleeve, the tip of the discharge side of the conduit is inserted into the bottom surface of the injection sleeve and stopped, and then hot water supply is started and the molten metal in the injection sleeve progresses with the progress of the hot water supply. When the molten metal immersion depth at the tip of the discharge side of the conduit reaches a predetermined value due to the rise of the liquid level, it is integrated with the conduit at the same speed as the rise of the molten metal liquid level so as to keep the predetermined molten metal immersion depth constant. If the hot water is supplied while raising the ladle, the splash and splash of the molten metal can be prevented. Since the hot water supply proceeds in a constant state, the amount of molten metal adhering to the outside of the conduit is constant every time, and the generation state of the oxide film of the molten metal can be made uniform. Therefore, in the sealed hot water supply device of the present invention, compared to the prior art,
Since the hot water supply conditions are made uniform every time, the hot water supply accuracy is high, the molten metal is less dripped during the ladle transfer, and the molten metal oxides are less mixed, so that the quality of the cast product can be kept good.

【０００８】[0008]

【実施例】以下図面に基づいて本発明の実施例の詳細に
ついて説明する。図１〜図５はいずれも本発明の実施例
に係り、図１は密閉式給湯装置の全体構成図、図２は密
閉式給湯装置（給湯中）の要部拡大縦断面図、図３は他
の実施例を示す密閉式給湯装置（酸化物除去清掃中）の
要部拡大縦断面図、図４は図２のＡ−Ａ視を示す非作業
中の酸化物除去装置の正面図、図５は図３のＢ−Ｂ視の
作業中の酸化物除去装置の位置状態を示す密閉式給湯装
置の要部拡大縦断面図である。Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 5 are all related to an embodiment of the present invention, FIG. 1 is an overall configuration diagram of a closed type hot water supply device, FIG. 2 is an enlarged vertical sectional view of a main part of the closed type hot water supply device (during hot water supply), and FIG. FIG. 4 is an enlarged vertical cross-sectional view of a main part of a sealed hot water supply apparatus (during oxide removal cleaning) showing another embodiment, FIG. 4 is a front view of a non-working oxide removal apparatus taken along line AA of FIG. FIG. 5 is an enlarged vertical cross-sectional view of a main part of the hermetically sealed water heater showing the position state of the oxide removing device during the work as seen from BB in FIG. 3.

【０００９】図１や図２に示すように、第１の発明であ
る密閉式給湯装置１は、直立円筒状のラドル２０を建屋
（または構造物）５０に傾斜して固設されたラドル懸垂
支持昇降シリンダ６０のピストンロッド６０ａの先端に
接続されて懸架され、溶解保持炉１０内にその大部分が
浸漬されるように保持したもので、ラドル２０は上端部
を天蓋２０ａと密閉蓋２０ｂとでそれぞれボルトナット
を介して接合されて密閉されるとともに、ラドル２０の
中間部側方に突出して設けられ、溶解保持炉１０のるつ
ぼ１０ａ内の溶湯Ｍがラドル２０内へ吸入するための上
方に開口した開口部（吸入口２０ｃ）を備えるととも
に、吸入口２０ｃと溶解保持炉１０とを連通遮断するた
めの弁棒２２と、天蓋２０ａに取り付けられたサポート
２４ａに載置固設された弁棒２２の昇降手段である弁棒
シリンダ２４とからなる開閉装置４０を備えている。そ
して、ラドル２０内に取り込まれる溶湯量が可変自在と
なるようにラドル２０は構成される。As shown in FIGS. 1 and 2, a hermetically sealed hot water supply apparatus 1 according to a first aspect of the present invention is a ladle suspension in which an upright cylindrical ladle 20 is inclined and fixed to a building (or structure) 50. It is connected to the tip of a piston rod 60a of a supporting lift cylinder 60 and suspended, and is held so that most of it is immersed in the melting and holding furnace 10. The ladle 20 has a canopy 20a and a sealing lid 20b at its upper end. In the melting and holding furnace 10, the molten metal M in the crucible 10a of the melting and holding furnace 10 is sucked up into the ladle 20. A valve rod 22 is provided which has an open opening (suction port 20c), and which shuts off the communication between the suction port 20c and the melting and holding furnace 10, and is fixedly mounted on a support 24a attached to the canopy 20a. Was provided with a closing device 40 made of stem cylinder 24. a lifting means of the valve stem 22. The ladle 20 is configured so that the amount of molten metal taken into the ladle 20 is variable.

【００１０】上述のように、第１の発明では、ラドル内
容量が可変自在とするために、ラドル２０は、図２に示
すように、有底円筒状の外筒２０Ａの内部中央部に水平
円盤状の隔壁２０ｅを設け、この隔壁２０ｅの中央に設
けた透孔に、上下方向摺動自在に内筒２０Ｂを嵌装して
配設する。内筒２０Ｂと前記した外筒中間部側方に設け
た吸入口２０ｃとは、内筒２０Ｂの中間部側方に設けた
長穴２０ｅを介して連通されている。外筒２０Ａの頂部
は密閉蓋２０ｂと天蓋２０ａで被覆され、この密閉蓋２
０ｂはその上部の天蓋２０ａとボルト締結されて一体と
され、この両者を内筒２０Ｂは貫通し、内筒２０Ｂの頂
部フランジと天蓋２０ａの頂部フランジとの間に内筒昇
降シリンダ２１が介装され内筒２０Ｂを昇降できるよう
に構成され外筒２０Ａと内筒２０Ｂとの相対高さ位置を
調節出来るようになっている。このようにして、ラドル
２０の内部は、隔壁２０ｅによって溶湯上部室（上部
室）２０Ｕと溶湯下部室（下部室）２０Ｌとに区画形成
される。さらに、下部室２０Ａに不活性ガス注入用の透
孔が設けられ、バルブ３０ａを経由して不活性ガス配管
３０に接続される。一方、上部室２０Ｕも、密閉蓋２０
ｂと天蓋２０ａにそれぞれ透孔を設けて、バルブ３０
ｂ、バルブ３０ｃや大気開放用のバルブ３０ｄを備える
不活性ガス配管３０に接続される。また、内筒２０Ｂの
頂部フランジにも透孔が設けられ、バルブ３０ｅを経由
して同じく不活性ガス配管３０に接続される。このよう
にして、ラドル２０は、外筒２０Ａ上部で形成された上
部室２０Ｕと、隔壁２０ｅ以下の外筒２０Ａで囲まれた
下部室２０Ｌとに区画され、内筒２０Ｂの中間部に設け
られた長穴２０ｆで連通される。外筒２０Ａの最下端中
央部の排出口２０ｄの下には、前記した導管２８が接続
される。導管２８は、外筒最下端から上方に湾曲し、内
筒頂部フランジとほぼ同じ高さ位置で、下方に反転し、
図２のように、射出スリーブ２００の軸線方向と平行に
下向きに傾斜される。As described above, according to the first aspect of the invention, since the ladle internal volume is variable, the ladle 20 is horizontally positioned at the inner center of the bottomed cylindrical outer cylinder 20A as shown in FIG. A disk-shaped partition wall 20e is provided, and an inner cylinder 20B is slidably fitted in a through hole provided at the center of the partition wall 20e. The inner cylinder 20B and the suction port 20c provided on the side of the middle part of the outer cylinder are communicated with each other through an elongated hole 20e provided on the side of the middle part of the inner cylinder 20B. The top of the outer cylinder 20A is covered with a sealing lid 20b and a canopy 20a.
0b is integrally bolted to the upper canopy 20a, and the inner cylinder 20B penetrates both of them, and the inner cylinder lift cylinder 21 is interposed between the top flange of the inner cylinder 20B and the top flange of the canopy 20a. The inner cylinder 20B can be moved up and down, and the relative height positions of the outer cylinder 20A and the inner cylinder 20B can be adjusted. In this way, the inside of the ladle 20 is partitioned into the molten metal upper chamber (upper chamber) 20U and the molten metal lower chamber (lower chamber) 20L by the partition wall 20e. Further, a through hole for injecting an inert gas is provided in the lower chamber 20A, and is connected to the inert gas pipe 30 via the valve 30a. On the other hand, the upper chamber 20U also has a sealing lid 20.
b and the canopy 20a are provided with through holes respectively, and the valve 30
b, connected to an inert gas pipe 30 provided with a valve 30c and a valve 30d for opening to the atmosphere. A through hole is also provided in the top flange of the inner cylinder 20B, and is also connected to the inert gas pipe 30 via the valve 30e. In this way, the ladle 20 is partitioned into the upper chamber 20U formed above the outer cylinder 20A and the lower chamber 20L surrounded by the outer cylinder 20A below the partition wall 20e, and is provided in the middle portion of the inner cylinder 20B. They are communicated with each other through the long holes 20f. The above-described conduit 28 is connected below the discharge port 20d at the center of the lowermost end of the outer cylinder 20A. The conduit 28 is curved upward from the lowermost end of the outer cylinder, and is inverted downward at substantially the same height as the top flange of the inner cylinder.
As shown in FIG. 2, the injection sleeve 200 is inclined downward in parallel with the axial direction.

【００１１】加圧ガスとしては、不活性ガスのほか、工
場内の廃棄ガスや燃焼ガスや通常の空気を使用すること
も出来るが、溶湯の酸化を防止するためには、酸素を含
まない不活性ガス（Ｎ₂ ガス、Ａｒガス、ＣＯ₂ ガスな
ど）が望ましい。一方、不活性ガス配管３０は、Ｎ₂ ガ
スやＡｒガス、ＣＯ2 ガスなどの不活性ガス供給装置７
０から供給される不活性ガスをラドル２０内へ注入する
設けられる。密閉蓋２０ａの上部に取り付けられたラド
ルサポート２６は前記したようにラドル懸垂支持昇降シ
リンダ６０のピストンロッド６０ａの先端に連結され、
ラドル懸垂支持昇降シリンダ６０の操作によりラドル２
０や導管２８は一体的に傾斜した軸線Ｘ−Ｘに沿って昇
降自在になっている。As the pressurized gas, in addition to the inert gas, waste gas in the factory, combustion gas, and normal air can be used, but in order to prevent the oxidation of the molten metal, the gas containing no oxygen is used. Active gas (N ₂ gas, Ar gas, CO ₂ gas, etc.) is desirable. On the other hand, the inert gas pipe 30 is provided with an inert gas supply device 7 for supplying N ₂ gas, Ar gas, CO ₂ gas or the like.
It is provided to inject an inert gas supplied from 0 into the ladle 20. The ladle support 26 attached to the upper portion of the sealing lid 20a is connected to the tip of the piston rod 60a of the ladle suspension support lifting cylinder 60 as described above.
By operating the ladle suspension support lifting cylinder 60, the ladle 2
0 and the conduit 28 can be raised and lowered along an integrally inclined axis X-X.

【００１２】不活性配管３０を流れる不活性ガスは、不
活性ガス供給装置７０を出た後、温度調節装置９０を通
過して所望の温度に昇温されるよう構成され、不活性ガ
ス供給装置７０と温度調節装置９０との間にある不活性
ガス供給制御装置８０により昇温温度や供給時間を任意
に制御できるよう構成される。また、３つの液圧シリン
ダである、ラドル懸垂支持昇降シリンダ６０と弁棒シリ
ンダ２４と内筒昇降シリンダ２１や、後述する酸化物除
去装置１００の掃除具昇降シリンダ１１０の油圧配管
は、各々独立して図示しない油圧ユニットに接続される
とともに、該油圧ユニットは、図示しないプログラマブ
ルコントローラと接続され、動作指令をプログラマブル
コントローラから受信して作動する。The inert gas flowing through the inert pipe 30 is configured so as to pass through the inert gas supply device 70 and then pass through the temperature control device 90 to be heated to a desired temperature. An inert gas supply control device 80 between the temperature control device 70 and the temperature control device 90 is configured so that the temperature rise and the supply time can be controlled arbitrarily. Further, the hydraulic pipes of the three hydraulic cylinders, that is, the ladle suspension supporting lifting cylinder 60, the valve rod cylinder 24, the inner cylinder lifting cylinder 21, and the cleaning tool lifting cylinder 110 of the oxide removing device 100, which will be described later, are independent of each other. Is connected to a hydraulic unit (not shown), and the hydraulic unit is connected to a programmable controller (not shown) and receives an operation command from the programmable controller to operate.

【００１３】また、図２〜図５に示すように、導管２８
の吐出部先端外周に付着した溶湯や溶湯酸化物を除去清
掃する酸化物除去装置１００が、サポート２６の導管吐
出側にサポート１０２を介して配設される。酸化物除去
装置１００は、図４〜図５に示すような、導管２８の外
周を把持して導管軸方向に摺動する左右一対の掃除具１
２２を備えた掃除具開閉シリンダ１２０と掃除具開閉シ
リンダ１２０を導管軸方向に昇降させる掃除具昇降シリ
ンダ１１０とより構成され、溶湯の給湯中は掃除具開閉
シリンダ１２０は図２に示すように上方に後退させて置
き、必要に応じて図３に示すように導管２８の吐出下端
部に掃除具１２２を上下に摺動させて、導管外周に付着
した溶湯や溶湯酸化物を剥離除去する。なお、掃除具昇
降シリンダ１１０と掃除具開閉シリンダ１２０やその他
のシリンダは油圧シリンダでなく、エアシリンダとして
もよい。また、ラドル２０内には、原則的には不要であ
るが、安全上、ラドル内に取り込まれる溶湯量を把握す
るため、湯面検知棒やレーザ光センサまたは超音波セン
サなどの溶湯液面レベル検出センサを配設してもよい。Also, as shown in FIGS.
An oxide removing device 100 for removing and cleaning molten metal and molten oxide adhered to the outer circumference of the tip of the discharge portion of is disposed on the conduit discharge side of the support 26 via a support 102. The oxide removing device 100 holds the outer circumference of the conduit 28 and slides in the axial direction of the conduit as shown in FIGS.
The cleaning tool opening / closing cylinder 120 includes a cleaning tool opening / closing cylinder 120 and the cleaning tool opening / closing cylinder 110 that moves the cleaning tool opening / closing cylinder 120 up and down in the axial direction of the conduit. The cleaning tool 122 is slid up and down on the discharge lower end portion of the conduit 28 as shown in FIG. 3 to remove the molten metal and molten oxide adhering to the outer periphery of the conduit, if necessary. The cleaning tool lifting cylinder 110, the cleaning tool opening / closing cylinder 120, and other cylinders may be air cylinders instead of hydraulic cylinders. In addition, in principle, it is not necessary in the ladle 20, but in order to ascertain the amount of molten metal taken into the ladle for safety, in order to grasp the molten metal level level of the molten metal level detection rod, laser light sensor, ultrasonic sensor, etc. A detection sensor may be provided.

【００１４】一方、図３は他の実施例を示す密閉式給湯
装置１Ａであり、図１や図２と異なる点のみ説明する
と、外筒内部中央部に設けた隔壁２０ｅに、内筒２０Ｂ
に代えて、上部が水平円板状のフランジで下方に円筒状
に突出した排出ノズル２０Ｃを嵌装しボルトナット等で
着脱自在に取り付けたものである。下部室２０Ｌに入る
溶湯は、前述したように、排出ノズル２０Ｃ下端以下で
あるから、下部室２０Ｌの溶湯量を変更したいときに
は、排出ノズル２０Ｃの軸方向長さを所望の溶湯量とな
る長さのものに変更することによって目的を達成でき
る。この方式は排出ノズル２０Ｃの昇降機構がないこと
や摺動部分のシールが不要である点から、構造が簡単で
設備費が安価であり、第１の発明に比較してさらに設備
費が低減化されるので、同一成形品を多数成形し、比較
的溶湯量の変更頻度の少ない機種に最適である。On the other hand, FIG. 3 shows a closed type hot water supply apparatus 1A showing another embodiment. Explaining only the points different from FIGS. 1 and 2, a partition wall 20e provided in the central portion of the outer cylinder has an inner cylinder 20B.
Instead of the above, a discharge nozzle 20C protruding downward in a cylindrical shape with a horizontal disk-shaped flange is fitted and detachably attached with a bolt nut or the like. As described above, the molten metal entering the lower chamber 20L is below the lower end of the discharge nozzle 20C. Therefore, when it is desired to change the molten metal amount of the lower chamber 20L, the axial length of the discharge nozzle 20C is set to a desired molten metal amount. You can achieve the purpose by changing to the one. This method has a simple structure and a low equipment cost because there is no elevating mechanism for the discharge nozzle 20C and a seal for the sliding portion is not required, and the equipment cost is further reduced compared to the first invention. Therefore, it is most suitable for a model in which a large number of identical molded products are molded and the amount of molten metal is changed relatively little.

【００１５】以上のように構成された本発明の密閉式給
湯装置１の作動について説明する。まず、上部室２０Ｕ
と下部室２０Ｌへあらかじめ大気圧の不活性ガスを充満
した後、バルブ３０ａおよびバルブ３０ｂを閉じてお
く。そのあと、ラドル２０を溶解保持炉１０のるつぼ１
０ａ内に静かに浸漬する。そして、図１のような高さ位
置状態（密閉蓋２０ｂの下面と溶解保持炉内溶湯レベル
とが一致する状態）に保持されたラドル２０において、
バルブ３０ａを閉じたままバルブ３０ｃを閉じバルブ３
０ｂ、バルブ３０ｄ、バルブ３０ｅを開けて、上部室２
０Ｕと内筒２０Ｂ内のみ大気開放し、そのあと、弁棒シ
リンダ２４を操作して弁棒２２を上昇して吸入口２０ｃ
を開状態にして上部室２０Ｕ内の気体を排出しつつ溶解
保持炉１０の溶湯Ｍをラドル２０内に自然吸入させる。The operation of the hermetically sealed water heater 1 of the present invention constructed as above will be described. First, upper chamber 20U
After filling the lower chamber 20L with an inert gas at atmospheric pressure in advance, the valves 30a and 30b are closed. After that, the ladle 20 is placed in the melting crucible 1 of the melting and holding furnace 10.
Soak gently in 0a. Then, in the ladle 20 held in the height position state as shown in FIG. 1 (state in which the lower surface of the sealing lid 20b and the molten metal level in the melting and holding furnace match),
Close valve 30c with valve 30a closed and valve 3
0b, valve 30d, valve 30e are opened, and the upper chamber 2
0U and the inside of the inner cylinder 20B are opened to the atmosphere, and then the valve rod cylinder 24 is operated to raise the valve rod 22 to raise the intake port 20c.
Is opened to allow the molten metal M of the melting and holding furnace 10 to be naturally sucked into the ladle 20 while discharging the gas in the upper chamber 20U.

【００１６】ラドル２０内に吸入された溶湯は、まず下
部室２０Ｌへ流れ込み、下部室２０Ｌ内の溶湯液面レベ
ルは次第に上昇するが、下部室２０Ｌの溶湯液面レベル
が内筒下端の排出ノズル下部先端に達すると下部室２０
Ｌ内の気体の逃げ場がなくなるので下部室溶湯液面はそ
れ以上上昇せず、その後の溶湯液面は排出ノズル２０ｄ
を上昇し、やがて上部室２０Ｕに溜まってゆき上部室２
０Ｕや内筒内部は溶湯で充満される（図１の状態とな
る）。このようにして、射出スリーブ２００へ供給する
１回の給湯量をラドル内に取り込むが、この１回の給湯
量は、上述のように溶解保持炉１０内に埋没させるラド
ル２０の高さで調節するが、他の方法として、ラドル２
０の外側に配設した図示しない湯面検知棒やレーザ光セ
ンサまたは超音波センサなどの溶湯液面レベル検出セン
サで調整してもよい。The molten metal sucked into the ladle 20 first flows into the lower chamber 20L, and the molten metal liquid level in the lower chamber 20L gradually rises. However, the molten metal liquid level in the lower chamber 20L is the discharge nozzle at the lower end of the inner cylinder. When reaching the lower end, the lower chamber 20
Since there is no escape area for the gas in L, the liquid level of the molten metal in the lower chamber does not rise any further, and the liquid level thereafter is the discharge nozzle 20d.
Rises, and eventually accumulates in the upper chamber 20U, and then the upper chamber 2
0 U and the inside of the inner cylinder are filled with the molten metal (the state shown in FIG. 1). In this way, the amount of hot water supplied once to the injection sleeve 200 is taken into the ladle. The amount of hot water supplied once is adjusted by the height of the ladle 20 to be buried in the melting and holding furnace 10 as described above. But the other way is Ladle 2
It may be adjusted by a molten metal level detecting sensor (not shown) arranged outside 0, a molten metal level detecting sensor such as a laser light sensor or an ultrasonic sensor.

【００１７】上述のいずれの場合にも、ラドル２０内の
溶湯液面は、図１に示すように、密閉蓋２０ｂの下面と
接するか、もしくは、下面とすれすれの状態に保持し、
ラドル２０内に封入される不活性ガス量を出来るだけ少
なくするのが望ましい。この後、不活性供給制御装置８
０を介して不活性ガス供給装置７０により不活性ガスを
不活性ガス配管３０を通じてラドル内に供給する。ま
た、不活性ガスは、温度調節装置９０により溶湯温度に
近接した、たとえば、２５０〜７００℃の範囲の中の一
定の温度状態に加熱して供給することが望ましい。In any of the above-mentioned cases, the molten metal surface in the ladle 20 is in contact with the lower surface of the sealing lid 20b, or is held in a state in which it is slid with respect to the lower surface, as shown in FIG.
It is desirable to reduce the amount of inert gas sealed in the ladle 20 as much as possible. After this, the inert gas supply control device 8
Inert gas is supplied to the inside of the ladle through the inert gas pipe 30 by the inert gas supply device 70 via 0. Further, it is desirable that the inert gas is heated by the temperature control device 90 to a temperature close to the temperature of the molten metal, for example, within a range of 250 to 700 ° C. and supplied.

【００１８】次に、ラドル２０内への溶湯の規定量の吸
入が終了した後、吸入口２０ｃを閉じるとともに、バル
ブ３０ｂも閉じ（バルブ３０ａはもともと閉じたま
ま）、ラドル２０を射出スリーブ２００の位置まで図示
しない移送設備にて移送した後、ラドル懸垂支持昇降シ
リンダ６０を操作して導管２８の吐出部先端２８ａを下
降させ、射出スリーブ２００内のプランジャチップ２０
０ａの上面に導管２８の吐出部先端２８ａを近接するよ
う調節したうえ、あらかじめ、たとえば１．１〜１．２
ｋｇ／ｃｍ² 程度の大気圧より僅かに大きい低圧に加圧
された不活性ガスをラドル２０内の下部室２０Ｌか、下
部室２０Ｌと上部室２０Ｕへ注入すると、ラドル２０内
の溶湯液面は加圧され導管２８を流れ導管２８の吐出部
先端２８ａより落下して射出スリーブ２００内へ注湯さ
れ始める（図２の状態）。Next, after the suction of the specified amount of the molten metal into the ladle 20 is completed, the suction port 20c is closed, the valve 30b is also closed (the valve 30a is originally closed), and the ladle 20 is attached to the injection sleeve 200. After being transferred to a position by a transfer facility (not shown), the ladle suspension support elevating cylinder 60 is operated to lower the discharge portion tip 28a of the conduit 28, and the plunger tip 20 in the injection sleeve 200 is moved.
The tip 28a of the discharge portion of the conduit 28 is adjusted to be close to the upper surface of 0a, and, for example, 1.1 to 1.2 in advance.
When the inert gas pressurized to a low pressure slightly higher than the atmospheric pressure of about kg / cm ² is injected into the lower chamber 20L in the ladle 20, or the lower chamber 20L and the upper chamber 20U, the molten metal liquid level in the ladle 20 becomes It is pressurized and drops in the conduit 28 from the tip 28a of the discharge part of the conduit 28 and starts to be poured into the injection sleeve 200 (state of FIG. 2).

【００１９】給湯量を変更したい場合には、第１の発明
では、内筒昇降シリンダ２１を操作して外筒２０Ａ内の
内筒２０Ｂを上下方向に摺動して両者の相対位置を変化
させる。すなわち、内筒昇降シリンダ２１のピストンロ
ッドを前進させて内筒２０Ｂを上昇させることにより、
下部室２０Ｌの容量を増加させることができる（上部室
２０Ｕの容量は常時不変）。つまり、１回の給湯量は、
上部室２０Ｕと下部室２０Ｌに入った溶湯の和となる。
一方、第２の発明では、前述したように、異なる長さを
もつ排出ノズルに変更することによって、下部室２０Ｌ
の溶湯量を変更する（この場合も上部室２０Ａの溶湯量
は不変）。When it is desired to change the hot water supply amount, in the first invention, the inner cylinder lifting cylinder 21 is operated to vertically slide the inner cylinder 20B in the outer cylinder 20A to change the relative position between the two. . That is, by moving the piston rod of the inner cylinder lifting cylinder 21 forward to raise the inner cylinder 20B,
The capacity of the lower chamber 20L can be increased (the capacity of the upper chamber 20U is always unchanged). In other words, the amount of hot water supplied once is
It is the sum of the molten metal in the upper chamber 20U and the lower chamber 20L.
On the other hand, in the second invention, as described above, the lower chamber 20L is changed by changing to the discharge nozzle having a different length.
The amount of molten metal in the upper chamber 20A is unchanged (also in this case, the amount of molten metal in the upper chamber 20A does not change).

【００２０】注湯作業が開始されるとともに射出スリー
ブ２００内に入った溶湯液面が次第に上昇し始めるので
導管２８の吐出部先端２８ａがこの溶湯液面に約２０ｍ
ｍ程浸漬された後、溶湯液面の上昇速度と同一速度で導
管２８が上昇するようにラドル２０を上昇させる。こう
することにより、吐出部先端２８ａの溶湯浸漬深さを前
述の約２０ｍｍの一定値に保持しながら射出スリーブ２
００内へ給湯することになる。射出スリーブ２００へ供
給する給湯量は、たとえばラドル内の溶湯液面が下降し
てラドル内に一定の深さで浸漬している湯面検知棒１５
０ａの下端以下になり、湯面検知棒１５０ａに流れてい
た電流が非通電状態になった時点で不活性ガスの供給を
ストップし、所定の溶湯量になるようにしている。この
ようにして、規定時間、不活性ガスを供給することによ
り規定量の溶湯をラドル２０内から射出スリーブ２００
内へ給湯する。When the pouring work is started, the liquid level of the molten metal that has entered the injection sleeve 200 gradually begins to rise, so that the tip 28a of the discharge portion of the conduit 28 is approximately 20 m above this molten metal level.
After being immersed for about m, the ladle 20 is raised so that the conduit 28 rises at the same speed as the rising speed of the molten metal surface. By doing so, the injection sleeve 2 is maintained while maintaining the molten metal immersion depth of the discharge portion tip 28a at the above-mentioned constant value of about 20 mm.
Hot water will be supplied to 00. The amount of hot water supplied to the injection sleeve 200 is, for example, the molten metal level detection rod 15 in which the molten metal surface in the ladle descends and is immersed in the ladle at a certain depth.
When the temperature is below the lower limit of 0a and the current flowing through the molten metal surface detection rod 150a becomes non-conducting state, the supply of the inert gas is stopped and the predetermined molten metal amount is reached. In this way, by supplying the inert gas for the specified time, the specified amount of molten metal is injected from the ladle 20 into the injection sleeve 200.
Hot water is supplied inside.

【００２１】以上述べた一連の作業手順（溶解保持炉へ
のラドル２０の浸漬、弁棒２２の上昇による吸入作業、
弁棒下降による吸入口２０ｃ閉止、導管吐出部先端の射
出スリーブ内挿入、不活性ガスのラドル内注入、給湯中
の導管上昇など）の順序起動停止プログラムをあらかじ
めプログラマブルコントローラに入力して、このプログ
ラムに則り作業を自動的に継続させることもできる。A series of working procedures described above (immersing the ladle 20 in the melting and holding furnace, suction work by raising the valve rod 22,
A sequence start / stop program for closing the inlet 20c by lowering the valve rod, inserting the tip of the conduit into the injection sleeve, injecting an inert gas into the ladle, and ascending the conduit during hot water supply is input to the programmable controller in advance, and this program is entered. The work can be automatically continued according to the above.

【００２２】さらに、射出スリーブ２００内への給湯時
に、導管２８の吐出部先端２８ａの浸漬深さをほぼ一定
に保って注湯するので、溶湯の射出スリーブ２００内へ
の落下による撥ね飛びや飛沫がなく、空気巻き込みが少
ない。また、吐出部先端２８ａの外側に付着する溶湯の
状況が毎回一定するとともに、その付着量も少なくなる
から溶湯酸化物の成形品への混入が最小限に止められ
る。そして、たとえば、図２〜図５に示した酸化物除去
装置１００を使用して必要に応じて適性な頻度で導管下
端部外側を清掃することにより、溶湯酸化物の製品への
混入が防止される。また、従来４〜５回分に相当する給
湯量を入れて溶解保持炉１０と射出スリーブ２００のあ
る場所まで往復していたラドルが、本発明では１回分の
み入れて往復するようになるので、ラドルの小型化によ
るラドル２０や昇降シリンダ６０の設備費や輸送費が軽
減される。Further, when the hot water is supplied into the injection sleeve 200, since the immersion depth of the tip end 28a of the discharge portion of the conduit 28 is kept substantially constant, the molten metal is splashed and splashed by falling into the injection sleeve 200. There is little air entrapment. In addition, the state of the molten metal that adheres to the outside of the discharge portion tip 28a is constant every time, and the amount of the molten metal also decreases, so that the mixing of molten oxide into the molded product can be minimized. Then, for example, by using the oxide removing apparatus 100 shown in FIGS. 2 to 5 to clean the outside of the lower end portion of the conduit at an appropriate frequency as needed, it is possible to prevent the molten oxide from being mixed into the product. It Further, since the ladle which has conventionally been fed back and forth between the melting and holding furnace 10 and the place where the injection sleeve 200 is provided with a hot water supply amount equivalent to 4 to 5 times, according to the present invention, it is fed back and forth only once, so that the ladle is moved back and forth. The equipment cost and transportation cost of the ladle 20 and the lifting cylinder 60 can be reduced by downsizing.

【００２３】[0023]

【発明の効果】以上述べたように、本発明の密閉式給湯
装置においては、給湯量の変更が簡便容易に行なうこと
が出来、給湯精度が向上するとともに、ラドル移送中の
滴下がほとんど無く、ラドル軽量化による製作費、設備
費の低減化が図られ、輸送費の低減による省エネルギ効
果が高く、不活性ガスの吹き込みによる押圧力で給湯す
るため酸化物の混入がほとんどなく、かつ、注湯時の空
気巻き込みも極力防止されるので、鋳造欠陥のない高品
質の鋳造品を連続安定的に供給できる。As described above, in the sealed hot water supply apparatus of the present invention, the amount of hot water can be changed easily and easily, the hot water supply accuracy is improved, and there is almost no drip during the transfer of the ladle. The production cost and equipment cost are reduced by reducing the weight of the ladles, the energy saving effect is high due to the reduction of transportation cost, and there is almost no oxide mixture because the hot water is supplied by the pressing force by the blowing of the inert gas. Since air entrapment during hot water is prevented as much as possible, it is possible to continuously and stably supply high-quality cast products with no casting defects.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の実施例に係る密閉式給湯装置の全体構
成図である。FIG. 1 is an overall configuration diagram of a closed water heater according to an embodiment of the present invention.

【図２】本発明の実施例に係る密閉式給湯装置（給湯
中）の要部拡大縦断面図である。FIG. 2 is an enlarged vertical cross-sectional view of a main part of the sealed hot water supply device (during hot water supply) according to the embodiment of the present invention.

【図３】本発明の他の実施例に係る密閉式給湯装置（酸
化物除去清掃中）の要部拡大縦断面図である。FIG. 3 is an enlarged vertical cross-sectional view of a main part of a closed-type hot water supply device (during oxide removal cleaning) according to another embodiment of the present invention.

【図４】図２のＡ−Ａ視を示す非作業中の酸化物除去装
置の正面図である。FIG. 4 is a front view of the oxide removing apparatus in a non-working state, which is taken along the line AA of FIG. 2.

【図５】図３のＢ−Ｂ視の作業中の酸化物除去装置の位
置状態を示す密閉式給湯装置の要部拡大縦断面図であ
る。5 is an enlarged longitudinal cross-sectional view of a main part of the sealed hot water supply device showing the position state of the oxide removing device during the work as viewed from BB in FIG.

【図６】従来の給湯装置の説明図である。FIG. 6 is an explanatory diagram of a conventional hot water supply device.

【図７】従来の給湯装置の説明図である。FIG. 7 is an explanatory diagram of a conventional hot water supply device.

【符号の説明】[Explanation of symbols]

１ 密閉式給湯装置 １Ａ 密閉式給湯装置 １０ 溶解保持炉 １０ａ るつぼ ２０ ラドル ２０Ａ 外筒 ２０Ｂ 内筒 ２０Ｃ 排出ノズル ２０Ｌ 溶湯下部室（下部室） ２０Ｕ 溶湯上部室（上部室） ２０ａ 天蓋 ２０ｂ 密閉蓋 ２０ｃ 吸入口 ２０ｄ 排出口 ２０ｅ 隔壁 ２０ｆ 長穴 ２１ 内筒昇降シリンダ ２２ 弁棒 ２４ 弁棒シリンダ ２４ａ サポート ２６ ラドルサポート ２８ 導管 ２８ａ 吐出部先端（吐出側先端部） ３０ 不活性ガス配管 ３０ａ、３０ｂ、３０ｃ、３０ｄ バルブ ４０ 開閉装置 ５０ 建屋（または構造物） ６０ ラドル懸垂支持昇降シリンダ ６０ａ ピストンロッド ７０ 不活性ガス供給装置 ８０ 不活性ガス供給制御装置 ９０ 温度調節装置 １００ 酸化物除去装置 １０２ サポート １１０ 掃除具昇降シリンダ １２０ 掃除具開閉シリンダ １２２ 掃除具 １５０ａ 湯面検知棒 １６０ レーザ光センサ １７０ 超音波センサ ２００ 射出スリーブ ２００ａ プランジャチップ 1 Closed Hot Water Supply Device 1A Closed Hot Water Supply Device 10 Melt Holding Furnace 10a Crucible 20 Ladle 20A Outer Cylinder 20B Inner Cylinder 20C Discharge Nozzle 20L Lower Molten Chamber (Lower Chamber) 20U Upper Molten Chamber (Upper Chamber) 20a Canopy 20b Sealed Lid 20c Inhalation Port 20d Discharge port 20e Partition wall 20f Long hole 21 Inner cylinder lifting cylinder 22 Valve rod 24 Valve rod cylinder 24a Support 26 Laddle support 28 Conduit 28a Discharge part tip (discharge side tip part) 30 Inert gas piping 30a, 30b, 30c, 30d Valve 40 Opening / closing device 50 Building (or structure) 60 Laddle suspension support lifting cylinder 60a Piston rod 70 Inert gas supply device 80 Inert gas supply control device 90 Temperature control device 100 Oxide removal device 102 Support 110 Cleaning tool lifting cylinder 120 Cleaning tool opening and closing Linda 122 cleaning instrument 150a melt surface detection rod 160 laser light sensor 170 ultrasonic sensor 200 the injection sleeve 200a plunger tip

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】 アルミニウム合金またはマグネシウム合
金の溶湯をダイカストマシンなどの射出スリーブ内へ給
湯する密閉式給湯装置であって、 溶湯の溶解保持炉内に浸漬されて懸架され中間部側方に
突出して設けた連通遮断自在な溶湯の吸入口を備えると
ともに該吸入口を連通遮断する弁棒と弁棒昇降用の弁棒
シリンダとからなる開閉装置をラドル本体の外部に備え
たラドルと、該ラドル懸垂支持昇降手段と、一端が該ラ
ドルの本体外筒底部に接続されたのち上部に向かって湾
曲し他端の溶湯吐出側が前記射出スリーブ内へ挿入され
該ラドル内の溶湯を前記射出スリーブへ注湯する導管
と、該ラドル内の溶湯液面を加圧する加圧ガスの注入手
段とを備えるとともに、 該ラドル本体外筒の内部中間部に水平板状の隔壁を設け
るとともに、該隔壁の中心部を貫通して該外筒の直径よ
りも小さな直径を有する内筒を該隔壁の中心部上下方向
に摺動自在に配設して、該隔壁上部に区画された容量一
定の溶湯上部室と該隔壁下部に区画された容量可変自在
な溶湯下部室とを形成し、該溶湯上部室ならびに該溶湯
下部室のそれぞれに不活性ガスの注入孔を設けて前記加
圧注入手段と接続し、かつ、該内筒の上下方向昇降手段
を備え、 前記導管の溶湯吐出側は、下方に向かって傾斜させると
ともに、前記ラドル懸垂支持昇降手段の昇降方向を傾斜
した導管と平行に傾斜させたことを特徴とする密閉式給
湯装置。1. A closed type water heater for supplying molten metal of an aluminum alloy or a magnesium alloy into an injection sleeve of a die casting machine or the like, which is immersed in a melting and holding furnace for molten metal and suspended to protrude laterally from an intermediate portion. A ladle provided with an opening / closing device provided outside the ladle body, which is provided with a molten metal suction port provided for free passage of communication and a valve rod cylinder for lifting and lowering the communication of the suction port, and the ladle suspension. The supporting elevating means and one end thereof is connected to the bottom of the outer cylinder of the main body of the ladle and then curved toward the upper part, and the melt discharge side of the other end is inserted into the injection sleeve, and the melt in the ladle is poured into the injection sleeve. And a means for injecting a pressurized gas for pressurizing the surface of the molten metal in the ladle, and a horizontal plate-shaped partition wall provided in the inner middle portion of the outer cylinder of the ladle body. An inner cylinder having a diameter smaller than that of the outer cylinder penetrating through the center of the partition wall and slidably arranged in the vertical direction of the center part of the partition wall, and the upper part of the melt having a constant volume partitioned into the partition wall upper part. A chamber and a molten metal lower chamber divided into lower parts of the partition wall are formed, and an inert gas injection hole is provided in each of the molten metal upper chamber and the molten metal lower chamber to connect with the pressurized injection means. And a vertical direction elevating means for the inner cylinder, wherein the molten metal discharge side of the conduit is inclined downward, and the elevating direction of the ladle suspension support elevating means is inclined parallel to the inclined conduit. A closed type hot water supply device. 【請求項２】 アルミニウム合金またはマグネシウム合
金の溶湯をダイカストマシンなどの射出スリーブ内へ給
湯する密閉式給湯装置であって、 溶湯の溶解保持炉内に浸漬されて懸架され中間部側方に
突出して設けた連通遮断自在な溶湯の吸入口を備えると
ともに該吸入口を連通遮断する弁棒と弁棒昇降用の弁棒
シリンダとからなる開閉装置をラドル本体の外部に備え
たラドルと、該ラドル懸垂支持昇降手段と、一端が該ラ
ドルの本体外筒底部に接続されたのち上部に向かって湾
曲し他端の溶湯吐出側が前記射出スリーブ内へ挿入され
該ラドル内の溶湯を前記射出スリーブへ注湯する導管
と、該ラドル内の溶湯液面を加圧する加圧ガスの注入手
段とを備えるとともに、 該ラドル本体外筒の内部中間部に水平板状の隔壁を設け
るとともに、該隔壁の中心部透孔に嵌装され下方に突出
した円筒管を有し上部に水平フランジを備えた排出ノズ
ルを該隔壁に着脱自在に固着して、該隔壁上部に区画さ
れた容量一定の溶湯上部室と該隔壁下部に区画された容
量一定の溶湯下部室とを形成し、該溶湯上部室ならびに
該溶湯下部室のそれぞれに前記加圧ガス注入手段により
注入される加圧ガスの注入孔を接続し、かつ、該内筒の
上下方向昇降手段を備え、 前記導管の溶湯吐出側は、下方に向かって傾斜させると
ともに、前記ラドル懸垂支持昇降手段の昇降方向を傾斜
した導管と平行に傾斜させたことを特徴とする密閉式給
湯装置。2. A closed type hot water supply device for supplying a molten metal of an aluminum alloy or a magnesium alloy into an injection sleeve of a die casting machine or the like, which is immersed and suspended in a melting and holding furnace for molten metal and protrudes to the side of an intermediate portion. A ladle provided with an opening / closing device provided outside the ladle body, which is provided with a molten metal suction port provided for free passage of communication and a valve rod cylinder for lifting and lowering the communication of the suction port, and the ladle suspension. The supporting elevating means and one end thereof is connected to the bottom of the outer cylinder of the main body of the ladle and then curved toward the upper part, and the melt discharge side of the other end is inserted into the injection sleeve, and the melt in the ladle is poured into the injection sleeve. And a means for injecting a pressurized gas for pressurizing the surface of the molten metal in the ladle, and a horizontal plate-shaped partition wall provided in the inner middle portion of the outer cylinder of the ladle body. A discharge nozzle having a cylindrical tube that is fitted into the central through hole and has a horizontal flange on the upper side is detachably fixed to the partition wall, and the molten metal upper portion with a constant volume is partitioned on the partition wall. Forming a chamber and a molten metal lower chamber divided into a lower portion of the partition wall, and connecting an injection hole for pressurized gas injected by the pressurized gas injection means to each of the molten metal upper chamber and the molten metal lower chamber. And the vertical direction elevating means of the inner cylinder is provided, and the molten metal discharge side of the conduit is inclined downward, and the elevating direction of the ladle suspension support elevating means is inclined parallel to the inclined conduit. A closed type hot water supply device. 【請求項３】 ラドルの溶湯の吸入口が上方に開口した
ことを特徴とする請求項１または請求項２記載の密閉式
給湯装置。3. The closed hot water supply apparatus according to claim 1, wherein a suction port for the molten metal of the ladle is opened upward.