JPH1038466A - Vacuum float dissolving apparatus and dissolving and casting method - Google Patents
Vacuum float dissolving apparatus and dissolving and casting methodInfo
- Publication number
- JPH1038466A JPH1038466A JP19379896A JP19379896A JPH1038466A JP H1038466 A JPH1038466 A JP H1038466A JP 19379896 A JP19379896 A JP 19379896A JP 19379896 A JP19379896 A JP 19379896A JP H1038466 A JPH1038466 A JP H1038466A
- Authority
- JP
- Japan
- Prior art keywords
- melting
- vacuum
- chamber
- crucible
- mold
- 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.)
- Withdrawn
Links
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- General Induction Heating (AREA)
- Crucibles And Fluidized-Bed Furnaces (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】この発明は、導電性の被溶解
材を交番磁界中において、電磁誘導作用によって誘導加
熱するとともに、所定の分布の磁界を生成して、被溶解
材に電磁力による浮揚力を与え浮揚状態で溶解すること
によって、高純度の材料を得ることのできる浮揚溶解装
置で、特に真空中で高純度の溶湯を溶解し、また、上部
から連続又は間欠的に被溶解材を投入し、下部に設けら
れた流出口から連続的または、間欠的に真空中で溶湯を
取り出す真空浮揚溶解装置とその溶解および出湯方法に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inductively heating a conductive material to be melted in an alternating magnetic field by electromagnetic induction, and generating a magnetic field having a predetermined distribution to float the material to be melted by electromagnetic force. A flotation melting device that can obtain high-purity material by applying force and melting in a floating state.It melts high-purity molten metal, especially in vacuum, and continuously or intermittently melts the material to be melted from above. TECHNICAL FIELD The present invention relates to a vacuum flotation melting apparatus which is charged and continuously or intermittently takes out a molten metal from an outlet provided at a lower portion in a vacuum, and a method for melting and discharging the molten metal.
【0002】[0002]
【従来の技術】浮揚溶解装置は、所定の分布になるよう
に生成された交番磁界中に溶解される材料を置き、電磁
誘導によって被溶解材に流れる渦電流を利用して、誘導
加熱と電磁力による浮揚力との双方を同時に与えて、材
料が浮いて、るつぼなど他の物に接触しない状態で溶解
させて、所定の材質と寸法の製品を得る装置である。溶
解時に他の物と接触しないために異物の混入が極めて少
ないこと、融点の高い材料でも溶解が可能であること、
熱伝導損失が小さいこと、などの特徴があることから、
高融点でしかも高純度が要求される材料、例えば、チタ
ン、シリコンなどの溶解処理に用いられる。2. Description of the Related Art In a levitation melting apparatus, a material to be melted is placed in an alternating magnetic field generated so as to have a predetermined distribution, and eddy current flowing through the material to be melted by electromagnetic induction is used for induction heating and electromagnetic melting. This is a device that gives a product of a predetermined material and size by simultaneously giving both levitation force and force to dissolve the material in a state where it floats and does not contact other objects such as a crucible. Extremely low contamination of foreign matter because it does not come into contact with other objects during melting, and melting of materials with high melting points is possible,
Because of the features such as small heat conduction loss,
It is used for dissolving materials that require a high melting point and high purity, such as titanium and silicon.
【0003】図4は従来例の構成図を示す。この図4に
おいて、1は有底の円筒状に形成されその底部に形成さ
れた溶湯を出す流出口1b、および円筒状部に放射状に
略等間隔で設けられた縦長のスリットを有する良導電金
属製のるつぼ、1aはるつぼ1内で被溶解材料が溶解さ
れた溶湯、2は被溶解材に、電磁誘導によって流れる渦
電流を利用して誘導加熱と電磁力による浮揚力との双方
を同時に与える誘導コイル、3は誘導コイル2に電流を
供給する交流電源、4はるつぼ1に被溶解材料を供給す
る溶解材料供給装置、5は溶湯1aを注型する金型、6
は流出口1bを塞ぐ栓、7は栓6を支持アーム8に接続
する接続管、8aは支持アーム8の昇降と旋回を案内板
10bの案内溝10dに係合してガイドするローラーフ
ォロア、10は支持アーム8を昇降する昇降機構、10
aは支持アーム8を栓6が流出口1bを塞ぐ位置に保持
するためのストッパ、10cは流出口中心から水平方向
に離れた位置で、支持アームの水平方向の旋回、および
昇降を案内する直線ガイド、11は栓開閉機構を示す。
この図4において、有底の円筒状に形成されその底部に
形成された溶湯1aを出す流出口1b、および円筒状部
に放射状に略等間隔で設けられた縦長のスリットを有す
る良導電金属製のるつぼ1の中に溶解材料供給装置4か
ら投入された被溶解材料は、交流電源3から電流を供給
される誘導コイル2の電磁誘導によって誘起される渦電
流で誘導加熱と電磁力による浮揚力との双方を同時に与
えられ、溶けて浮揚した溶湯1aになる。このるつぼ1
で溶解された溶湯1aは、溶解時に他の物と接触しない
ために異物の混入が極めて少ないこと、融点の高い材料
でも溶解が可能であること、熱伝導損失が小さいこと、
などの特徴があることから、高融点でしかも高純度が要
求される材料、例えば、チタン、シリコン等の溶解に用
いられる。FIG. 4 shows a configuration diagram of a conventional example. In FIG. 4, reference numeral 1 denotes a good conductive metal having a bottomed cylindrical shape, an outlet 1b formed at the bottom for discharging molten metal, and a vertically elongated slit radially provided in the cylindrical portion at substantially equal intervals. 1a is a molten metal in which the material to be melted is melted in the crucible 1, and 2 is simultaneously applying to the material to be melted both induction heating and levitation force by electromagnetic force using eddy current flowing by electromagnetic induction. An induction coil, 3 is an AC power supply for supplying current to the induction coil 2, 4 is a molten material supply device for supplying a material to be melted to the crucible 1, 5 is a mold for casting the molten metal 1a, 6 is
Is a plug for closing the outlet 1b, 7 is a connecting pipe for connecting the plug 6 to the support arm 8, 8a is a roller follower for guiding the lifting and lowering and turning of the support arm 8 by engaging the guide groove 10d of the guide plate 10b, 10 Is a lifting mechanism for raising and lowering the support arm 8;
a is a stopper for holding the support arm 8 at a position where the plug 6 closes the outlet 1b, 10c is a position horizontally separated from the center of the outlet, and a straight line for guiding the support arm in the horizontal direction and for ascending and descending. Reference numeral 11 denotes a stopper opening / closing mechanism.
In FIG. 4, a well-conductive metal material having a bottomed cylindrical shape, an outlet 1b for discharging a molten metal 1a formed at the bottom thereof, and a vertically long slit radially provided at substantially equal intervals in the cylindrical portion. The material to be melted supplied from the melted material supply device 4 into the crucible 1 is subjected to induction heating and levitation force by electromagnetic force due to eddy current induced by electromagnetic induction of the induction coil 2 supplied with current from the AC power supply 3. Are given at the same time, and the molten metal 1a melts and floats. This crucible 1
The molten metal 1a melted in the step 1 does not come into contact with other objects at the time of melting, so that foreign matter is extremely little mixed therein, that a material having a high melting point can be melted, heat conduction loss is small,
Because of these features, it is used for dissolving materials that require a high melting point and high purity, such as titanium and silicon.
【0004】るつぼの下部から出湯するこの浮揚溶解装
置では、溶解初期に少量の金属が溶け出して、その少量
の溶湯1aが浮揚力を受けて浮揚するほどの量に達しな
い場合に、少量の溶湯1aがるつぼ1の流出口1bから
落下する恐れがあるのでこれを防止するためと、また、
溶解中に電源3が切れて溶湯1aが浮揚力を失い落下し
た場合に流出口1bから落下するのを防止するためとに
栓6が使用される。[0004] In this floating melting apparatus in which the molten metal is discharged from the lower part of the crucible, when a small amount of metal melts out at the initial stage of melting and the small amount of the molten metal 1a does not reach the amount to float due to the levitation force, a small amount of metal is melted. The molten metal 1a may fall from the outlet 1b of the crucible 1 to prevent this, and
The plug 6 is used to prevent the molten metal 1a from falling out of the outlet 1b when the power supply 3 is cut off during melting and the molten metal 1a loses buoyancy and falls.
【0005】以下に栓6を開閉する栓開閉機構11の動
作を説明する。栓6は接続管7を介して支持アーム8で
流出口1bを塞ぐように支持されている。支持アーム8
は、その昇降をガイドする直線ガイド10cに水平方向
の旋回自在に遊嵌されて、支持アーム8の後端のローラ
ーフォロア8aを案内板10bの案内溝10dに係合さ
せて、直線ガイド10cと案内溝10dに係合するロー
ラーフォロア8aとで昇降途中に水平旋回が与えられ
る。The operation of the plug opening and closing mechanism 11 for opening and closing the plug 6 will be described below. The stopper 6 is supported by a support arm 8 via a connection pipe 7 so as to close the outlet 1b. Support arm 8
Is rotatably and loosely fitted in a horizontal guide to a linear guide 10c that guides the ascending and descending, and engages a roller follower 8a at the rear end of the support arm 8 with a guide groove 10d of a guide plate 10b. A horizontal turn is given to the roller follower 8a engaged with the guide groove 10d during the ascent and descent.
【0006】上記の構成で栓6の開放は、昇降機構10
により支持アーム8を昇降する際は、まず、栓6が流出
口1bを塞ぐ位置となるように支持アーム8を保持して
いるストッパ10aを解除して支持アーム8の昇降をフ
リーにして、昇降機構10を下降方向に付勢して、支持
アーム8を直線ガイド10cと、案内溝10dに係合し
たローラーフォロア8aとで直線的な下降と水平旋回と
を組み合わせた下降動作をさせて、流出口1bの直下か
ら栓6を退避位置に退避させる。[0006] In the above configuration, opening of the stopper 6 is performed by the elevating mechanism 10.
When the support arm 8 is moved up and down, first, the stopper 10a holding the support arm 8 is released so that the stopper 6 is at a position where the plug 6 closes the outlet 1b, so that the support arm 8 can be moved up and down freely. When the mechanism 10 is urged in the descending direction, the support arm 8 is caused to descend by a combination of linear descending and horizontal turning by the linear guide 10c and the roller follower 8a engaged with the guide groove 10d. The stopper 6 is retracted to the retract position from immediately below the outlet 1b.
【0007】この状態で誘導コイル2の電流を制御して
溶湯1aを流出口を経て金型に注型し、注型完了後は別
の金型と交換して次の注型に備える。出湯完了後は、上
記と逆の手順で栓6を上昇させて流出口1bを塞ぎ次回
の溶解に備える。In this state, the current of the induction coil 2 is controlled to cast the molten metal 1a into the mold through the outlet, and after completion of the casting, the mold is replaced with another mold to prepare for the next casting. After the tapping is completed, the stopper 6 is raised in the reverse procedure to close the outlet 1b to prepare for the next melting.
【0008】[0008]
【発明が解決しようとする課題】ところで、従来の浮揚
溶解装置では溶解は、大気中あるいは不活性ガス雰囲気
中で行われていたが、大気中では、溶解中に酸化した金
属が混じってしまい溶解材の純度が低下する。また、不
活性ガス中においては、金属の酸化は減少するが溶解材
料に含まれるガス等が除去できず溶解材の純度を向上さ
せることが出来なかった。In the conventional levitation melting apparatus, melting is performed in the air or in an inert gas atmosphere. However, in the air, the oxidized metal is mixed during melting and the melting is performed. The purity of the material decreases. Further, in the inert gas, the oxidation of the metal was reduced, but the gas contained in the dissolved material could not be removed, and the purity of the dissolved material could not be improved.
【0009】この発明は上記課題を解決するためになさ
れたもので、その目的とするところは、真空中で溶解作
業を行うことで、金属の酸化およびガス等の混入を無く
し、また脱ガス等により高純度の金属材料を得、且つ、
溶解された溶湯を真空中で金型に注型し成形することに
より高純度の成形部品を得ることができる真空浮揚溶解
装置を提供することにある。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. An object of the present invention is to eliminate the oxidation of metals and the incorporation of gases, etc. To obtain a high-purity metal material, and
An object of the present invention is to provide a vacuum levitation melting apparatus capable of obtaining a high-purity molded part by casting a molten metal into a mold in a vacuum and molding the molten metal.
【0010】[0010]
【課題を解決するための手段】請求項1記載の発明によ
れば、有底の円筒状に形成されその底部に形成された溶
湯流出口および円筒状部に放射状に略等間隔で設けられ
た縦長のスリットを有する良導電金属製のるつぼと、る
つぼの外径側を囲むように設置した誘導コイル、流出口
を塞ぐ栓、その栓を開閉する栓開閉機構を有する浮揚溶
解装置と、るつぼの上部から導電性の被溶解材をるつぼ
内に投入する溶解材料供給装置と、流出口下部に溶湯を
流し込む金型とを真空容器内に設けた真空浮揚溶解装置
とする。According to the first aspect of the present invention, the molten metal is formed in a bottomed cylindrical shape, and is provided radially at substantially equal intervals in the melt outlet and the cylindrical portion formed at the bottom. A crucible made of a good conductive metal having a vertically elongated slit, an induction coil installed to surround the outer diameter side of the crucible, a plug closing the outlet, a flotation melting device having a plug opening / closing mechanism for opening and closing the plug, and a crucible A vacuum flotation and melting apparatus is provided in which a melting material supply device for charging a conductive material to be melted into a crucible from an upper portion and a mold for casting a molten metal at a lower portion of an outlet are provided in a vacuum vessel.
【0011】上記構成により真空中で浮揚溶解し注型す
ることが可能になる。請求項2記載の発明によれば、請
求項1記載の真空浮揚溶解装置において、被溶解材をる
つぼ内に投入する溶解材料供給装置と、浮揚溶解装置と
の間を仕切る隔壁およびその隔壁の一部を開閉する第一
の真空仕切弁を設けるとともに、浮揚溶解装置と、金型
との間を仕切る隔壁およびその隔壁の一部を開閉する第
二の真空仕切弁を設けて、真空容器内を、溶解材料供給
装置を備えた材料供給室と、浮揚溶解装置の溶解室と、
金型を設置した成形室との3室に分割した真空浮揚溶解
装置とする。According to the above configuration, it is possible to float and melt in a vacuum to perform casting. According to the second aspect of the present invention, in the vacuum flotation and melting apparatus according to the first aspect, a partition wall that separates the molten material supply device into which the material to be melted is put into the crucible and the flotation melting device and one of the partition walls is provided. A first vacuum gate valve for opening and closing the part is provided, and a flotation melting device, a partition wall for partitioning between the mold and a second vacuum gate valve for opening and closing a part of the partition wall are provided, and the inside of the vacuum vessel is provided. A material supply chamber equipped with a molten material supply device, and a melting chamber of a flotation melting device,
It is a vacuum flotation melting apparatus divided into three chambers, a molding chamber in which a mold is installed.
【0012】請求項3記載の発明によれば、請求項1ま
たは請求項2に記載の真空浮揚溶解装置において、金型
をるつぼ下部流出口近傍と、流出口から離れた下部の定
位置との間で昇降させる金型昇降機構を設けた真空浮揚
溶解装置とする。請求項4記載の発明によれば、請求項
1ないし請求項3のいずれかに記載の真空浮揚溶解装置
において、るつぼ上方に、るつぼ上部開口部を開閉移動
可能に覆うリフレクターを設けた真空浮揚溶解装置とす
る。According to a third aspect of the present invention, in the vacuum flotation and melting apparatus according to the first or second aspect, the mold is positioned between the vicinity of the lower outlet of the crucible and the fixed position of the lower portion away from the outlet. A vacuum flotation and melting apparatus provided with a mold elevating mechanism for elevating and lowering between them. According to a fourth aspect of the present invention, there is provided the vacuum flotation and melting apparatus according to any one of the first to third aspects, wherein a reflector is provided above the crucible so as to open and close the crucible opening. Equipment.
【0013】請求項5記載の発明によれば、請求項1な
いし請求項4のいずれかに記載の真空浮揚溶解装置にお
いて、材料供給室、溶解室および成形室の各々に、不活
性ガス導入手段を設けた真空浮揚溶解装置とする。請求
項6記載の発明によれば、請求項1ないし請求項4のい
ずれかに記載の真空浮揚溶解装置において、材料供給
室、成形室および溶解室を、各々独立して真空排気およ
び圧力制御を可能とした真空浮揚溶解装置とする。According to a fifth aspect of the present invention, in the vacuum levitation melting apparatus according to any one of the first to fourth aspects, an inert gas introducing means is provided in each of the material supply chamber, the melting chamber and the molding chamber. And a vacuum levitation melting apparatus provided with According to the invention described in claim 6, in the vacuum flotation melting apparatus according to any one of claims 1 to 4, the material supply chamber, the molding chamber, and the melting chamber are independently evacuated and controlled in pressure. Vacuum flotation and melting equipment made possible.
【0014】上記請求項2〜請求項6の構成により有底
筒状のるつぼと、るつぼの外径側に設置した誘導コイル
と、るつぼ底部流出口を塞ぐ栓とを一つの真空容器に設
置した溶解室と、その上部に真空仕切弁を介して、分割
した真空容器で、内部には材料を投入する溶解材料供給
装置を収納した材料供給室と、溶解室下部に真空仕切弁
を介して分割した真空容器で、内部には溶解室内で溶解
した溶湯を流し込む金型と金型を前記溶解室内るつぼ下
部流出口近傍へ移動する昇降機構が具備された成形室と
の3室に分離した構成とし、各々の真空室を個別に真空
制御ができるようにし、かつ、材料供給室および成形室
を低真空領域とし、溶解室のみ高真空領域とすることに
より、真空ポンプの容量を小型化できる。また3室の真
空制御を個別制御にしたことにより、材料供給の際は材
料供給室のみ大気に戻し、真空溶解室および成形室とも
真空状態のままで材料供給ができる。真空室内のるつぼ
に材料を供給する際は、材料供給室を真空排気した状態
で高真空領域の真空溶解室に不活性ガスを供給して圧力
バランスをとることによって、差圧の発生を防ぎ、ゴ
ミ、埃の舞い上がりを防止して溶解材料を供給すること
ができる。このことにより、例えば、溶解室で溶解作業
中に材料を追加したり、別の材料を供給して合金を作る
時などでも高純度の溶解を可能とする。また、溶解室で
溶解した溶湯を、成形室内の金型に供給する際も、同様
に溶解室に不活性ガスを供給して圧力バランスをとり供
給することで、高純度の成形品を注型することができ
る。さらに、注型後の成形室を不活性ガスを供給して大
気圧状態とすることにより、注型後の成形品の冷却時間
を短縮することができる。また、この冷却時間中でも、
溶解室は真空状態を維持することができ、ゴミ、埃、不
純ガスの発生を防いだ状態で、次の溶解作業に備えるこ
とができる。また、成形室は、真空仕切弁を介して取り
外しを容易に設置してあり、例えば、線材を成形する場
合は、成形室毎真空仕切弁から取り外して、線材成形ユ
ニットが取り付けられた成形室に交換することが可能に
なる。According to the constitution of the second to sixth aspects, the bottomed cylindrical crucible, the induction coil installed on the outer diameter side of the crucible, and the stopper for closing the crucible bottom outlet are installed in one vacuum vessel. A vacuum chamber divided into a melting chamber and an upper part through a vacuum gate valve, and a material supply chamber containing a melting material supply device into which a material is charged inside, and a lower part through a vacuum gate valve at the lower part of the melting chamber. The vacuum vessel has a configuration in which a mold into which the molten metal melted in the melting chamber is poured, and a molding chamber provided with an elevating mechanism for moving the mold to a position near the lower outlet of the crucible in the melting chamber. The capacity of the vacuum pump can be reduced by allowing each vacuum chamber to be individually vacuum controlled, and by setting the material supply chamber and the molding chamber to a low vacuum area and only the melting chamber to a high vacuum area. In addition, since the vacuum control of the three chambers is individually controlled, only the material supply chamber is returned to the atmosphere at the time of material supply, and the material can be supplied in a vacuum state in both the vacuum melting chamber and the molding chamber. When the material is supplied to the crucible in the vacuum chamber, the material supply chamber is evacuated and an inert gas is supplied to the vacuum melting chamber in the high vacuum area to balance the pressure, thereby preventing the occurrence of a differential pressure, Dissolved material can be supplied while preventing dust and dust from rising. This enables high-purity melting even when, for example, a material is added during the melting operation in the melting chamber or another material is supplied to form an alloy. Also, when supplying the molten metal melted in the melting chamber to the mold in the molding chamber, the inert gas is similarly supplied to the melting chamber to balance the pressure and to supply high-purity molded products. can do. Furthermore, by supplying an inert gas to the molding chamber after casting to make it at atmospheric pressure, the cooling time of the molded article after casting can be shortened. Also during this cooling time,
The melting chamber can be maintained in a vacuum state, and can be prepared for the next melting operation while preventing generation of dust, dust, and impurity gas. In addition, the molding chamber is easily installed and removed via a vacuum gate valve.For example, in the case of forming a wire, the molding chamber is removed from the vacuum gate valve and removed to the molding chamber to which the wire forming unit is attached. It becomes possible to exchange.
【0015】請求項7記載の発明によれば、請求項1な
いし請求項6のいずれかに記載の真空浮揚溶解装置にお
いて、材料供給室が大気圧下で材料供給室の扉を開け室
内の溶解材料供給装置に導電性の被溶解材材料を供給
し、材料供給後は、真空排気系により、材料供給室を真
空引きし、材料供給室から溶解室内のるつぼに材料を供
給する際、高真空領域の溶解室圧力を不活性ガスを導入
して、材料供給室の圧力と同レベルにした後、第一の真
空仕切弁を開き材料供給室内の溶解材料供給装置から被
溶解材料投入し、材料投入終了後は第一の真空仕切弁を
閉じて溶解室を真空排気系で高真空領域まで真空引きし
て規定の圧力を確保した後、溶解を開始する。材料供給
室は不活性ガスを導入して大気圧に戻し次回投入材料の
受入れに備える。溶解された溶湯を次工程の金型に注型
する際は、まず、高真空領域の溶解室圧力を不活性ガス
を導入して、成形室の圧力と同レベルにした後、真空溶
解室と成形室との間の第二の真空仕切弁を開き、次に溶
解室内のるつぼ底部の流出口を塞ぐ栓を、栓開閉機構に
より、成形室内金型の昇降移動範囲から退避した位置ま
で移動し、栓移動完了と同時に、成形室内の金型を、金
型昇降機構でるつぼ流出口近傍まで上昇させて溶湯を注
型し、注型後は、金型を金型昇降機構で定位値へ戻し第
二の真空仕切弁を閉じ、第二の真空仕切弁を閉じた後溶
解室は、真空排気系で再び高真空領域まで真空引きし、
次の溶解作業に備え、成形室は不活性ガスを導入し大気
圧状態で冷却した後、金型を取り出し、金型を取り出し
た後の成形室は、新たに次の金型を設置し、真空排気系
で規定圧力まで真空引きし、次の溶解作業に供えるよう
にした真空浮揚溶解装置の溶解および出湯方法とする。According to a seventh aspect of the present invention, in the vacuum levitation melting apparatus according to any one of the first to sixth aspects, the material supply chamber is opened under atmospheric pressure by opening a door of the material supply chamber and melting the chamber. The conductive material to be melted is supplied to the material supply device, and after the material is supplied, the material supply chamber is evacuated by the vacuum exhaust system, and when the material is supplied from the material supply chamber to the crucible in the melting chamber, a high vacuum is applied. After introducing the inert gas into the melting chamber pressure in the region and bringing the pressure to the same level as the pressure in the material supply chamber, the first vacuum gate valve is opened, and the material to be melted is introduced from the melt material supply device in the material supply chamber. After the charging is completed, the first vacuum gate valve is closed, the melting chamber is evacuated to a high vacuum region by a vacuum exhaust system to secure a specified pressure, and then melting is started. The material supply chamber introduces an inert gas and returns to atmospheric pressure to prepare for receiving the next input material. When casting the molten metal into the mold of the next process, first, the pressure of the melting chamber in the high vacuum region is introduced to the same level as the pressure of the molding chamber by introducing an inert gas, and then the vacuum melting chamber is opened. The second vacuum gate valve between the molding chamber is opened, and then the stopper for closing the outlet at the bottom of the crucible in the melting chamber is moved by the stopper opening / closing mechanism to a position retracted from the vertical movement range of the mold in the molding chamber. Upon completion of the stopper movement, the mold in the molding chamber is raised to the vicinity of the crucible outlet by the mold elevating mechanism, and the molten metal is cast. After the casting, the mold is returned to the localization value by the mold elevating mechanism. After closing the second vacuum gate valve and closing the second vacuum gate valve, the melting chamber is evacuated again to a high vacuum region by a vacuum exhaust system,
In preparation for the next melting operation, the molding chamber was introduced with an inert gas and cooled at atmospheric pressure, the mold was removed, and after the mold was removed, the molding chamber was newly installed with the next mold, A method of melting and tapping a vacuum flotation and melting apparatus, which is evacuated to a specified pressure by a vacuum exhaust system and used for the next melting operation.
【0016】上記構成により真空容器内で、材料供給か
ら溶解作業および注型作業までを連続して行うことが可
能になる。According to the above configuration, it is possible to continuously perform operations from material supply to melting operation and casting operation in the vacuum vessel.
【0017】[0017]
【発明の実施の形態】図1はこの発明の実施の形態の主
要部の構成図を示す。この図1において、従来例と同一
の符号を付けた部材はおおよそ同一の機能を有するので
その説明は省略する。この図1において、1は有底の円
筒状に形成されその底部に形成された溶湯を出す流出口
1b、および円筒状部に放射状に略等間隔で設けられた
縦長のスリットを有する良導電金属製のるつぼ、1aは
るつぼ1内で被溶解材料が溶解された溶湯、1cはるつ
ぼ1に冷却水を給排水するマニホールド、2は被溶解材
に、電磁誘導によって流れる渦電流を利用して誘導加熱
と電磁力による浮揚力との双方を同時に与える誘導コイ
ル、3は誘導コイル2に電流を供給する交流電源、4は
るつぼ1に被溶解材料を供給する溶解材料供給装置、5
は溶湯1aを注型する金型、6は流出口1bを塞ぐ栓、
7は栓6を支持アーム8に接続する接続管、8aは支持
アーム8の昇降と旋回を案内板10bの案内溝10dに
係合してガイドするローラーフォロア、9は溶解材料供
給装置4、およびるつぼ1、誘導コイル2、栓6および
栓開閉機構を有する浮揚溶解装置、金型5を収容する真
空容器、9aは誘導コイル2に交流電流を供給する導体
を真空容器9に導入するための絶縁真空フランジ、10
は支持アーム8を昇降する昇降機構、10aは支持アー
ム8を栓6が流出口1bを塞ぐ位置に保持するためのス
トッパ、10cは流出口中心から水平方向に離れた位置
で、支持アームの水平方向の旋回、および昇降をさせる
直線ガイド、11aは栓6の上述した栓開閉機構、12
は金型5を昇降する金型昇降機構、13は直線ガイド1
0cを真空容器に連通させる真空導入フランジ、14は
溶湯1aの輻射熱を遮蔽する熱遮蔽用のリフレクター、
14aはリフレクターをるつぼ上方から旋回退避させる
旋回機構、15は真空容器内を排気する真空排気系、1
5aは真空排気系15の遮断バルブ、16は溶解材料供
給装置4に外部から材料を供給するための扉、17は真
空容器9内に不活性ガスを供給する不活性ガス導入手
段、17aは不活性ガス導入手段17のガス遮断バルブ
を示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a configuration diagram of a main part of an embodiment of the present invention. In FIG. 1, members denoted by the same reference numerals as those of the conventional example have approximately the same functions, and therefore description thereof will be omitted. In FIG. 1, reference numeral 1 denotes a good conductive metal having a bottomed cylindrical shape, an outlet 1b formed at the bottom for discharging a molten metal, and a vertically long slit radially provided in the cylindrical portion at substantially equal intervals. 1a is a molten metal in which the material to be melted is melted in the crucible 1, 1c is a manifold for supplying and draining cooling water to and from the crucible 1, 2 is induction heating using eddy current flowing to the material to be melted by electromagnetic induction. And an electromagnetic coil, which simultaneously provide both a levitation force and an electromagnetic force, an AC power supply for supplying a current to the induction coil, a melting material supply device for supplying a material to be melted to the crucible, and
Is a mold for casting the molten metal 1a, 6 is a stopper for closing the outlet 1b,
Reference numeral 7 denotes a connecting pipe connecting the stopper 6 to the support arm 8, reference numeral 8a denotes a roller follower that guides the lifting and lowering and turning of the support arm 8 by engaging with the guide groove 10d of the guide plate 10b, reference numeral 9 denotes the molten material supply device 4, and A fusing / melting device having a crucible 1, an induction coil 2, a stopper 6, and a stopper opening / closing mechanism, a vacuum container for accommodating a mold 5, and 9a is an insulation for introducing a conductor for supplying an alternating current to the induction coil 2 into the vacuum container 9. Vacuum flange, 10
Is a lifting mechanism for raising and lowering the support arm 8, 10a is a stopper for holding the support arm 8 at a position where the plug 6 closes the outlet 1b, 10c is a position horizontally separated from the center of the outlet, and A linear guide for turning and raising and lowering the direction, 11a is the above-described plug opening / closing mechanism of the plug 6, 12
Is a mold elevating mechanism for elevating and lowering the mold 5, and 13 is a linear guide 1.
A vacuum introducing flange for communicating 0c with the vacuum vessel, a heat shielding reflector for shielding radiant heat of the molten metal 1a,
14a is a turning mechanism for turning and retracting the reflector from above the crucible, 15 is a vacuum exhaust system for exhausting the inside of the vacuum vessel, 1
5a is a shut-off valve of the vacuum evacuation system 15, 16 is a door for supplying a material from the outside to the molten material supply device 4, 17 is an inert gas introducing means for supplying an inert gas into the vacuum vessel 9, and 17a is an inert gas introducing means. 3 shows a gas shut-off valve of the active gas introducing means 17.
【0018】この図1において、被溶解材料は、真空排
気系15により真空容器9内を排気した後、不活性ガス
を不活性ガス導入手段17からガス遮断バルブ17aを
開放して導入し真空容器9内が大気圧になってから扉1
6を開き溶解材料供給装置4に供給される。溶解材料供
給装置4、および有底の円筒状に形成されその底部に形
成された溶湯1aを出す流出口1b、および円筒状部に
放射状に略等間隔で設けられた縦長のスリット、冷却水
を給排水するマニホールドを有する良導電金属製のるつ
ぼ1、誘導コイル2、栓6等で構成される浮揚溶解装
置、溶解された溶湯を注型する金型5は真空容器9の中
に収容されている。交流電源3は真空容器9外の大気圧
下に設置されており、絶縁真空フランジ9aを通して真
空容器9内の誘導コイル2に導体で接続され交流電流を
供給する。溶解作業は、真空容器9内を真空排気系15
で所定の圧力に減圧してから開始する。次に、リフレク
ター14を旋回機構14aによりるつぼ1の上方から旋
回退避し、るつぼ1の中に溶解材料供給装置4から被溶
解材料を投入する。その溶解材料は交流電源3から電流
を供給される誘導コイル2の電磁誘導によって誘起され
る渦電流で誘導加熱と電磁力による浮揚力との双方を同
時に与えられ、溶けて浮揚した溶湯1aになり、出湯条
件が整えられた後金型5に出湯される。溶解中はリフレ
クター14を旋回機構14aでるつぼ1の上方に旋回さ
せてるつぼ1からの輻射熱が上方の機器を過熱しないよ
うに熱遮蔽している。このるつぼ1で溶解された溶湯1
aは、溶解時に他の物と接触しないために異物の混入が
極めて少ないこと、融点の高い材料でも溶解が可能であ
ること、熱伝導損失が小さいこと、さらに真空中での溶
解であることから金属酸化、溶解中のガス吸収が無く、
また溶湯1aからの脱ガス作用があるなどの特徴がある
ことから、高融点でしかも高純度が要求される材料、例
えば、チタン、シリコン等の溶解に用いられる。In FIG. 1, after the inside of the vacuum vessel 9 is evacuated by the vacuum exhaust system 15, the inert gas is introduced from the inert gas introduction means 17 by opening the gas shut-off valve 17 a to introduce the material to be melted. Door 1 after 9 is at atmospheric pressure
6 is opened and supplied to the molten material supply device 4. The molten material supply device 4, an outlet 1b formed in a cylindrical shape with a bottom and discharging the molten metal 1a formed in the bottom, and a vertically long slit radially provided in the cylindrical portion at substantially equal intervals, and cooling water. A flotation and melting apparatus including a crucible 1 made of a good conductive metal having a manifold for supplying and discharging water, an induction coil 2, a plug 6, and the like, and a mold 5 for casting molten metal are housed in a vacuum vessel 9. . The AC power supply 3 is installed under the atmospheric pressure outside the vacuum vessel 9 and is connected by a conductor to the induction coil 2 in the vacuum vessel 9 through an insulating vacuum flange 9a to supply an AC current. The melting operation is performed by evacuating the inside of the vacuum container 9 to a vacuum exhaust system 15.
To start after reducing the pressure to a predetermined pressure. Next, the reflector 14 is turned and retracted from above the crucible 1 by the turning mechanism 14 a, and the material to be melted is put into the crucible 1 from the melting material supply device 4. The molten material is provided with both induction heating and buoyancy by electromagnetic force at the same time by eddy current induced by electromagnetic induction of the induction coil 2 to which current is supplied from the AC power supply 3, and melts into a molten metal 1 a. After the tapping conditions are adjusted, tapping is performed to the mold 5. During melting, the reflector 14 is turned by the turning mechanism 14a above the crucible 1, so that the radiant heat from the crucible 1 does not overheat the equipment above the heat. Melt 1 melted in this crucible 1
a is extremely low in foreign matter mixing because it does not come into contact with other substances during melting, is capable of melting even a material having a high melting point, has a small heat conduction loss, and is melted in a vacuum. No metal oxidation, no gas absorption during melting,
Further, since it has a characteristic of degassing from the molten metal 1a, it is used for dissolving a material having a high melting point and high purity, for example, titanium, silicon and the like.
【0019】るつぼ1の下部から出湯するこの浮揚溶解
装置では、溶解初期に少量の金属が溶け出して、その少
量の溶湯1aが浮揚力を受けて浮揚するほどの量に達し
ない場合に、少量の溶湯1aがるつぼ1の流出口1bか
ら落下する恐れがあるのでこれを防止するためと、ま
た、溶解中に電源3が切れて溶湯1aが浮揚力を失い落
下した場合に流出口1bから落下するのを防止するため
とに栓6が使用される。In this flotation and melting apparatus in which the molten metal is discharged from the lower part of the crucible 1, a small amount of metal is melted in the initial stage of melting, and when the small amount of molten metal 1a does not reach the amount of floating due to the buoyancy force, In order to prevent the molten metal 1a from falling out of the outlet 1b of the crucible 1 to prevent this, and to drop from the outlet 1b when the power source 3 is cut off during melting and the molten metal 1a loses buoyancy and falls. A plug 6 is used to prevent this.
【0020】以下に栓6を開閉する栓開閉機構11aの
動作を説明する。栓6は接続管7を介して支持アーム8
で流出口1bを塞ぐように支持されている。支持アーム
8は、その昇降をガイドする直線ガイド10cを支点に
して水平方向の旋回自在に取付られて、直線ガイド10
cの上部の真空導入フランジ13を通して大気中に露出
した部分でローラーフォロア8aを案内板10bの案内
溝10dに係合させて、直線ガイド10cと案内溝10
dに係合するローラーフォロア8aとを連携し昇降装置
10に取付られた部材10eを介して昇降と、その途中
に水平旋回が与えられる。The operation of the plug opening and closing mechanism 11a for opening and closing the plug 6 will be described below. The stopper 6 is connected to a support arm 8 via a connecting pipe 7.
To support the outlet 1b. The support arm 8 is mounted so as to be pivotable in the horizontal direction with a linear guide 10c for guiding the ascending and descending as a fulcrum.
The roller follower 8a is engaged with the guide groove 10d of the guide plate 10b at the portion exposed to the atmosphere through the vacuum introduction flange 13 on the upper part of the linear guide 10c and the guide groove 10c.
In association with the roller follower 8a engaging with the member d, lifting and lowering is performed through a member 10e attached to the lifting and lowering device 10, and horizontal turning is given along the way.
【0021】上記の構成で栓6の開放は、昇降機構10
により支持アーム8を昇降する際は、まず、栓6が流出
口1bを塞ぐ位置となるように部材10eを保持してい
るストッパ10aを解除して部材10eおよび支持アー
ム8の昇降をフリーにして、昇降機構10を下降方向に
付勢して、支持アーム8を直線ガイド10cと、案内溝
10dに係合したローラーフォロア8aとで直線的な下
降と水平旋回とを組み合わせた下降動作をさせて、流出
口1bの直下から栓6を退避位置に退避させる。In the above configuration, opening of the stopper 6 is performed by the lifting mechanism 10.
When the support arm 8 is raised and lowered, first, the stopper 10a holding the member 10e is released so that the stopper 6 is at a position where the plug 6 closes the outlet 1b, so that the member 10e and the support arm 8 can be freely raised and lowered. By urging the elevating mechanism 10 in the descending direction, the support arm 8 is caused to perform a descending operation combining linear descending and horizontal turning with the linear guide 10c and the roller follower 8a engaged with the guide groove 10d. The plug 6 is retracted to the retracted position from immediately below the outlet 1b.
【0022】この状態で金型5を昇降装置12により流
出口1bの近傍にまで上昇させて、誘導コイル2の電流
を制御して溶湯1aを流出口を経て金型5に注型し、注
型完了後は金型5を昇降装置12により下降させてから
別の金型と交換して次の注型に備える。出湯完了後は、
上記と逆の手順で栓6を上昇させて流出口1bを塞ぎ次
回の溶解に備える。In this state, the mold 5 is raised to the vicinity of the outlet 1b by the elevating device 12, and the current of the induction coil 2 is controlled to cast the molten metal 1a into the mold 5 via the outlet. After completion of the mold, the mold 5 is lowered by the elevating device 12, and then replaced with another mold to prepare for the next casting. After the bath is completed,
The stopper 6 is raised in the reverse procedure to close the outlet 1b to prepare for the next dissolution.
【0023】図2はこの発明の別の実施の形態の主要部
の構成図を示す。この図2において、1は有底の円筒状
に形成されその底部に形成された溶湯を出す流出口1
b、および円筒状部に放射状に略等間隔で設けられた縦
長のスリットを有する良導電金属製のるつぼ、1aはる
つぼ1内で被溶解材料が溶解された溶湯、1aはるつぼ
1内で被溶解材料が溶解された溶湯、1cはるつぼ1に
冷却水を給排水するマニホールド、2は被溶解材に、電
磁誘導によって流れる渦電流を利用して誘導加熱と電磁
力による浮揚力との双方を同時に与える誘導コイル、3
は誘導コイル2に電流を供給する交流電源、4はるつぼ
1に被溶解材料を供給する溶解材料供給装置、5は溶湯
1aを注型する金型、6は流出口1bを塞ぐ栓、7は栓
6を支持アーム8に接続する接続管、8aは支持アーム
8の昇降と旋回を案内板10bの案内溝10dに係合し
てガイドするローラーフォロア、9は溶解材料供給装置
4、および浮揚溶解装置、金型を収容する真空容器、9
aは誘導コイル2に交流電流を供給する導体を真空容器
9に導入するための絶縁真空フランジ、10は支持アー
ム8を昇降する昇降機構、10aは支持アーム8を栓6
が流出口1bを塞ぐ位置に保持するためのストッパ、1
0cは流出口中心から水平方向に離れた位置で、支持ア
ームの水平方向の旋回、および昇降をさせる直線ガイ
ド、11aは栓開閉機構、12は金型を昇降する金型昇
降機構、13は直線ガイド10cを真空容器に連通させ
る真空導入フランジ、14は溶湯1aの輻射熱を遮蔽す
る熱遮蔽用のリフレクター、14aはリフレクターをる
つぼ上方から旋回退避させる旋回機構、15は真空容器
内を排気する真空排気系、15a、15b,15cは真
空排気系15の遮断バルブ、16は溶解材料供給装置4
に外部から材料を供給するための扉、17は真空容器9
内に不活性ガスを供給する不活性ガス導入手段、17
a,17b,17cは不活性ガス導入手段17のガス遮
断バルブ、18aは溶解材料供給装置と、浮揚溶解装置
との間の第一の真空仕切弁、18bは浮揚溶解装置と、
金型との間の第二の真空仕切弁を示す。FIG. 2 is a block diagram showing a main part of another embodiment of the present invention. In FIG. 2, reference numeral 1 denotes an outlet 1 which is formed in a cylindrical shape with a bottom and discharges a molten metal formed at the bottom.
b, a crucible made of a good conductive metal having vertically elongated slits radially provided at substantially equal intervals in a cylindrical portion, 1a is a molten metal in which the material to be melted is melted in the crucible 1, and 1a is a melted metal in the crucible 1. 1c is a manifold for supplying and draining cooling water to and from the crucible 1; 2c is a material to be melted, using eddy current flowing by electromagnetic induction to simultaneously perform both induction heating and buoyancy by electromagnetic force. Giving induction coil, 3
Is an AC power supply for supplying current to the induction coil 2, 4 is a molten material supply device for supplying the material to be melted to the crucible 1, 5 is a mold for casting the molten metal 1a, 6 is a stopper for closing the outlet 1b, 7 is A connecting pipe for connecting the plug 6 to the support arm 8, a roller follower 8 a for engaging the guide arm 10 d with a guide groove 10 d to guide the lifting and lowering and turning of the support arm 8, a melting material supply device 4, and a levitation melting Equipment, vacuum container for housing the mold, 9
a is an insulating vacuum flange for introducing a conductor for supplying an alternating current to the induction coil 2 into the vacuum vessel 9; 10 is an elevating mechanism for elevating and lowering the support arm 8;
For holding the outlet 1b in a position to close the outlet 1b,
0c is a position horizontally separated from the center of the outlet, and is a linear guide for turning and raising and lowering the support arm in the horizontal direction, 11a is a stopper opening / closing mechanism, 12 is a mold elevating mechanism for elevating and lowering a mold, and 13 is a straight line. A vacuum introduction flange for connecting the guide 10c to the vacuum vessel, a heat shielding reflector 14 for shielding radiant heat of the molten metal 1a, a turning mechanism 14a for turning and retracting the reflector from above the crucible, and a vacuum exhaust 15 for exhausting the inside of the vacuum vessel System, 15a, 15b, 15c are shut-off valves of the vacuum exhaust system 15, and 16 is a molten material supply device 4.
For supplying material from the outside to the vacuum chamber 17
Inert gas introducing means for supplying an inert gas into the inside, 17
a, 17b, 17c are gas shut-off valves of the inert gas introducing means 17, 18a is a first vacuum gate valve between the molten material supply device and the flotation melting device, 18b is a flotation melting device,
3 shows a second vacuum gate valve between the mold and the mold.
【0024】この図2が図1と異なる点は、溶解材料供
給装置と、浮揚溶解装置との間に第一の真空仕切弁18
aを設けるとともに、浮揚溶解装置と、金型との間に第
二の真空仕切弁18bを設けて、溶解材料供給装置を備
えた材料供給室100と、浮揚溶解装置の溶解室200
と、金型を設置した成形室300との3室に分離した点
と、3室をそれぞれ別々の真空圧力、または不活性ガス
を導入した大気圧に制御できるようにした点である。FIG. 2 differs from FIG. 1 in that a first vacuum gate valve 18 is provided between the molten material supply device and the flotation melting device.
a, and a second vacuum gate valve 18b is provided between the levitation melting apparatus and the mold to provide a material supply chamber 100 having a melting material supply apparatus and a melting chamber 200 of the levitation melting apparatus.
And a mold chamber 300 in which a mold is installed. The three chambers are separated from each other, and the three chambers can be controlled to different vacuum pressures or atmospheric pressures into which an inert gas is introduced.
【0025】なお、3室をそれぞれ別々の真空圧力、ま
たは不活性ガスを導入した大気圧に制御するために真空
排気系15(低真空用)の一つが遮断バルブ15aを介
して材料供給室100と、遮断バルブ15cを介して成
形室300とに接続されており、他の真空排気系15
(高真空用)が遮断バルブ15bを介して溶解室200
に接続されている。In order to control each of the three chambers to a different vacuum pressure or an atmospheric pressure into which an inert gas has been introduced, one of the vacuum exhaust systems 15 (for low vacuum) is connected to the material supply chamber 100 via a shut-off valve 15a. Is connected to the molding chamber 300 via a shut-off valve 15c.
(For high vacuum) through the shut-off valve 15b
It is connected to the.
【0026】また、不活性ガス導入手段17はガス遮断
バルブ17aを介して材料供給室100に、ガス遮断バ
ルブ17bを介して溶解室200に、ガス遮断バルブ1
7cを介して成形室300にそれぞれ接続されている。
このように二つの真空排気系15と、三つの遮断バルブ
15a,15b,15cと、三つのガス遮断バルブ17
a,17b,17cとを組み合わせることにより三室を
それぞれ別個に圧力制御できる。The inert gas introducing means 17 is connected to the material supply chamber 100 via the gas shut-off valve 17a, and to the melting chamber 200 via the gas shut-off valve 17b.
Each is connected to the molding chamber 300 via 7c.
Thus, the two evacuation systems 15, three shutoff valves 15a, 15b, 15c, and three gas shutoff valves 17
By combining a, 17b, and 17c, the pressure in each of the three chambers can be individually controlled.
【0027】上記の図2を用いてこの発明の他の実施の
形態の真空浮揚溶解装置の溶解および出湯方法について
説明する。真空浮揚溶解装置での溶解方法は、まず、材
料供給室100を大気圧下で上部の扉16を開き、溶解
材料供給装置6に導電性の被溶解材を投入する。投入
後、扉16を閉じて、材料供給室100に繋がる遮断バ
ルブ15aを開き、真空排気系15で規定の圧力まで真
空排気する。次に、高真空の溶解室200の圧力を不活
性ガス導入手段17からガス遮断バルブ17bを開放し
て不活性ガスを導入して、前記、材料供給室と同圧と
し、材料供給室100と溶解室200との間の第一の真
空仕切弁18aを開く。次に、溶解室内のリフレクター
14をリフレクター旋回機構14aでるつぼ1の上方か
ら旋回退避させた後、材料供給室100内の溶解材料供
給装置6から導電性の被溶解材をるつぼ1に投入する。
材料投入後は、第一の真空仕切弁18aを閉じ、溶解室
200を再び規定の圧力に真空排気するとともに、前記
リフレクター14を定位置に戻す。材料投入後は、るつ
ぼ1の外側に配置した誘導コイル2に、交流電源3から
電力を供給し浮揚溶解を行う。次に、浮揚溶解で溶解し
た溶湯1aを金型5に注型する際は、高真空の溶解室2
00と成型室300の圧力を材料供給時と同様に不活性
ガス導入手段17からガス遮断バルブ17bを開放して
不活性ガスを導入して同圧とした後、溶解室200と成
型室300との間の第二の真空仕切弁18bを開く。次
に、るつぼ1の流出口1bを塞いでいる栓6を挿入した
状態で、直線ガイド10cおよび支持アーム8を保持し
ているストッパー10a開放し、昇降機構10で円筒カ
ム式ガイド板10bのガイド溝10dに沿って、るつぼ
1の下部に配置した金型5が昇降移動する昇降領域を邪
魔しない位置まで、支持アーム8に接続された栓6を移
動する。栓6を開栓後、金型5を金型昇降機構12で、
るつぼ1の流出口1bに近づけ、溶湯1aが外に飛び散
らないように注型を行う。注型後は、逆の動作となる。
すなわち、注型後の金型5を金型昇降機構12で定位値
まで下降させ第二の真空仕切弁18bを閉じると同時
に、溶解室を再び規定圧力まで排気する。次に、支持ア
ーム8に接続された栓6を、昇降機構10で上昇させ、
円筒カム式ガイド板10bのガイド溝10dに沿って、
旋回移動および直線上昇してるつぼ1の流出口1bに挿
入復帰し、上部ストッパー10aで保持する。次に、成
型室300の真空排気系15の遮断バルブ15cを閉
じ、不活性ガス導入手段17のガス遮断弁17cを開
き、不活性ガスを導入して、成型室を大気圧に戻し成型
品を冷却後取り出す。尚、この成型品を冷却中に、溶解
室内のるつぼ1には、新たに材料供給室から材料を、前
述と同様な手順で投入して次の溶解作業を行うことが可
能となる。A melting and tapping method of a vacuum levitation melting apparatus according to another embodiment of the present invention will be described with reference to FIG. In the melting method using the vacuum levitation melting apparatus, first, the upper door 16 is opened in the material supply chamber 100 under the atmospheric pressure, and the conductive material to be melted is charged into the melt material supply apparatus 6. After the charging, the door 16 is closed, the shut-off valve 15a connected to the material supply chamber 100 is opened, and the vacuum exhaust system 15 evacuates to a specified pressure. Next, the pressure of the high-vacuum melting chamber 200 is increased by opening the gas shut-off valve 17b from the inert gas introducing means 17 to introduce an inert gas to the same pressure as that of the material supply chamber. The first vacuum gate valve 18a between the melting chamber 200 is opened. Next, after the reflector 14 in the melting chamber is turned and retracted from above the crucible 1 by the reflector turning mechanism 14a, the conductive material to be melted is put into the crucible 1 from the melting material supply device 6 in the material supply chamber 100.
After charging the material, the first vacuum gate valve 18a is closed, the melting chamber 200 is evacuated again to a specified pressure, and the reflector 14 is returned to the home position. After the material is charged, power is supplied from an AC power supply 3 to the induction coil 2 arranged outside the crucible 1 to perform levitation melting. Next, when the molten metal 1a melted by the flotation melting is cast into the mold 5, a high vacuum melting chamber 2 is used.
After the gas shutoff valve 17b is opened from the inert gas introducing means 17 and the inert gas is introduced to the same pressure as in the material supply, the melting chamber 200 and the molding chamber 300 Open the second vacuum gate valve 18b. Next, with the stopper 6a holding the linear guide 10c and the support arm 8 opened while the stopper 6 closing the outflow port 1b of the crucible 1 is inserted, the guide of the cylindrical cam type guide plate 10b is lifted by the lifting mechanism 10. The plug 6 connected to the support arm 8 is moved along the groove 10d to a position where the mold 5 arranged at the lower part of the crucible 1 does not obstruct the elevating area where the die 5 moves up and down. After opening the stopper 6, the mold 5 is moved by the mold elevating mechanism 12,
The casting is performed close to the outlet 1b of the crucible 1 so that the molten metal 1a does not scatter outside. After casting, the operation is reversed.
That is, the mold 5 after casting is lowered to the localization value by the mold elevating mechanism 12, the second vacuum gate valve 18b is closed, and at the same time, the melting chamber is evacuated again to the specified pressure. Next, the stopper 6 connected to the support arm 8 is raised by the lifting mechanism 10,
Along the guide groove 10d of the cylindrical cam type guide plate 10b,
After being swiveled and moved straight up, it is inserted back into the outlet 1b of the crucible 1 and held by the upper stopper 10a. Next, the shutoff valve 15c of the vacuum exhaust system 15 of the molding chamber 300 is closed, the gas shutoff valve 17c of the inert gas introduction means 17 is opened, an inert gas is introduced, the molding chamber is returned to the atmospheric pressure, and the molded product is returned. Remove after cooling. While the molded product is being cooled, a new material can be charged from the material supply chamber into the crucible 1 in the melting chamber in the same procedure as described above, and the next melting operation can be performed.
【0028】図3は図2の発明の他の実施例の主要部の
構成図を示す。この図3において、材料供給室100、
および溶解室200は図2の構成と同じであるのでその
説明は省略する。この図3は成型室300を分離面から
切離し、成型室300内の金型5を他の成型ユニット例
えば線材成型ユニット19に交換した例である。FIG. 3 is a block diagram showing a main part of another embodiment of the invention shown in FIG. In FIG. 3, the material supply chamber 100,
The dissolving chamber 200 has the same configuration as that shown in FIG. FIG. 3 shows an example in which the molding chamber 300 is separated from the separation surface, and the mold 5 in the molding chamber 300 is replaced with another molding unit, for example, the wire rod molding unit 19.
【0029】[0029]
【発明の効果】この発明によれば、真空容器内に良導電
金属製のセグメントが周方向に絶縁板を介して積層され
てなる有底円筒状のるつぼと、るつぼの外径側を囲むよ
うに設置した誘導コイルと、るつぼの上部から、導電製
の被溶解材を投入する溶解材料供給装置と、溶湯を注型
する金型が備えられているので、1つの真空容器内で、
材料供給から溶解作業および注型作業までを連続して行
うことにより、ゴミ,埃,不純ガス等の混入の少ない、
より高純度の金属材料が得られる効果がある。According to the present invention, a bottomed cylindrical crucible in which segments made of a good conductive metal are laminated in a vacuum vessel in a circumferential direction via an insulating plate, and the outer periphery of the crucible is surrounded. An induction coil installed in the crucible, a melting material supply device for charging the conductive material to be melted from the top of the crucible, and a mold for casting the molten metal are provided.
By continuously performing from the material supply to the melting operation and the casting operation, there is little mixing of dust, dust, impurity gas, etc.
There is an effect that a metal material with higher purity can be obtained.
【0030】また、るつぼ上部に、るつぼ開口部を開閉
移動可能なリフレクターを配置したことにより、溶解中
の輻射熱を遮り、真空容器上部が加熱されるのを防ぐ効
果がある。さらに、溶湯を流し込む金型を、るつぼ下部
に金型昇降機構で昇降自在に配置して、開栓後、金型を
るつぼ流出口にできる限り近づけることにより溶湯が外
に飛び散らないようにする効果がある。Further, by disposing a reflector capable of opening and closing the crucible opening at the top of the crucible, it has an effect of blocking radiant heat during melting and preventing the upper portion of the vacuum vessel from being heated. In addition, the mold into which the molten metal is poured is placed at the bottom of the crucible so as to be able to move up and down by the mold elevating mechanism, and after opening, the mold is brought as close as possible to the crucible outlet to prevent the molten metal from scattering outside. There is.
【0031】さらに、真空容器を材料供給室、真空溶解
室、成型室の3室に真空仕切弁で分離し、各々の真空室
を独立して真空排気および圧力制御を可能としたことに
より、先ず、真空室の容積を用途にみあった最適の大き
さ、最適な圧力とすることができ、その結果、真空排気
ポンプの容量も小さくすることができる。また、真空溶
解作業中に、次の新しい材料の供給が可能となり、連続
溶解作業に効果がある。Furthermore, the vacuum vessel is separated into three chambers, a material supply chamber, a vacuum melting chamber, and a molding chamber, by a vacuum gate valve, and each vacuum chamber can be independently evacuated and pressure controlled. In addition, the volume of the vacuum chamber can be set to an optimum size and an optimum pressure according to the application, and as a result, the capacity of the vacuum pump can be reduced. Further, during the vacuum melting operation, the next new material can be supplied, which is effective for the continuous melting operation.
【0032】また、3室を分離したことにより、メンテ
ナンス時でも全室を大気にさらすことが無く、清浄な環
境を維持することができる。さらに、成型室のように、
ワークの種類が変わる場合でも成型室をワーク毎にユニ
ット化しておけば、ユニットの交換により生産性を向上
できる効果がある。Further, since the three chambers are separated from each other, a clean environment can be maintained without exposing all the rooms to the atmosphere even during maintenance. Furthermore, like a molding room,
Even if the type of work is changed, if the molding chamber is unitized for each work, there is an effect that productivity can be improved by replacing the unit.
【図1】この発明の実施の形態の主要部分の構成図FIG. 1 is a configuration diagram of a main part of an embodiment of the present invention.
【図2】この発明の別の実施の形態の主要部分の構成図FIG. 2 is a configuration diagram of a main part of another embodiment of the present invention.
【図3】図2の発明の他の実施例の主要部の構成図FIG. 3 is a configuration diagram of a main part of another embodiment of the invention of FIG. 2;
【図4】従来例の構成図FIG. 4 is a configuration diagram of a conventional example.
4 材料供給装置 9 真空容器 9a 絶縁真空フランジ 11a 栓開閉機構 12 金型昇降機構 13 真空導入フランジ 14 リフレクター 14a リフレクター旋回機構 15 真空排気系 15a 遮断バルブ 15b 遮断バルブ 15c 遮断バルブ 16 扉 17 不活性ガス導入手段 17a ガス遮断バルブ 17b ガス遮断バルブ 17c ガス遮断バルブ 18a 第一の真空仕切弁 18b 第二の真空仕切弁 19 線材成形ユニット Reference Signs List 4 material supply device 9 vacuum container 9a insulating vacuum flange 11a stopper opening / closing mechanism 12 mold elevating mechanism 13 vacuum introducing flange 14 reflector 14a reflector turning mechanism 15 vacuum exhaust system 15a shutoff valve 15b shutoff valve 15c shutoff valve 16 door 17 inert gas introduction Means 17a Gas shut-off valve 17b Gas shut-off valve 17c Gas shut-off valve 18a First vacuum gate 18b Second vacuum gate 19 Wire forming unit
Claims (7)
れた溶湯流出口および円筒状部に放射状に略等間隔で設
けられた縦長のスリットを有する良導電金属製のるつぼ
と、るつぼの外径側を囲むように設置した誘導コイル、
流出口を塞ぐ栓、その栓を開閉する栓開閉機構を有する
浮揚溶解装置と、るつぼの上部から導電性の被溶解材を
るつぼ内に投入する溶解材料供給装置と、流出口下部に
溶湯を流し込む金型とを真空容器内に設けたことを特徴
とする真空浮揚溶解装置。1. A crucible made of a good conductive metal having a bottomed cylindrical shape, a molten metal outlet formed at the bottom thereof, and a vertically elongated slit radially provided in the cylindrical portion at substantially equal intervals, and a crucible. An induction coil installed to surround the outer diameter side of the
A flotation / melting device having a plug for closing the outlet, a plug opening / closing mechanism for opening and closing the plug, a melting material supply device for feeding a conductive material to be melted into the crucible from the upper part of the crucible, and pouring the molten metal into a lower part of the outlet. A vacuum flotation melting apparatus characterized in that a mold and a mold are provided in a vacuum vessel.
て、被溶解材をるつぼ内に投入する溶解材料供給装置
と、浮揚溶解装置との間を仕切る隔壁およびその隔壁の
一部を開閉する第一の真空仕切弁を設けるとともに、浮
揚溶解装置と、金型との間を仕切る隔壁およびその隔壁
の一部を開閉する第二の真空仕切弁を設けて、真空容器
内を、溶解材料供給装置を備えた材料供給室と、浮揚溶
解装置の溶解室と、金型を設置した成形室との3室に分
割したことを特徴とする真空浮揚溶解装置。2. A vacuum flotation melting apparatus according to claim 1, wherein a partition for separating the molten material supply device for charging the material to be melted into the crucible and the flotation melting device and a part of the partition are opened and closed. A single vacuum gate valve is provided, and a flotation melting device and a partition wall separating the mold and a second vacuum gate valve for opening and closing a part of the partition wall are provided. A vacuum flotation / melting apparatus characterized by being divided into three chambers: a material supply chamber provided with the above, a melting chamber of the flotation / melting apparatus, and a molding chamber in which a mold is installed.
溶解装置において、金型をるつぼ下部流出口近傍と、流
出口から離れた下部の定位置との間で昇降させる金型昇
降機構を設けたことを特徴とする真空浮揚溶解装置。3. The vacuum lifting and melting apparatus according to claim 1, wherein the mold is moved up and down between a vicinity of the lower crucible outlet and a fixed position at a lower part away from the outlet. A vacuum levitation melting apparatus characterized by comprising:
の真空浮揚溶解装置において、るつぼ上方に、るつぼ上
部開口部を開閉移動可能に覆うリフレクターを設けたこ
とを特徴とする真空浮揚溶解装置。4. A vacuum levitation melting apparatus according to claim 1, further comprising a reflector provided above the crucible so as to open and close the crucible opening. apparatus.
の真空浮揚溶解装置において、材料供給室、溶解室およ
び成形室の各々に、不活性ガス導入手段を設けたことを
特徴とする真空浮揚溶解装置。5. A vacuum levitation melting apparatus according to claim 1, wherein an inert gas introducing means is provided in each of the material supply chamber, the melting chamber, and the molding chamber. Vacuum flotation melting equipment.
の真空浮揚溶解装置において、材料供給室、成形室およ
び溶解室を、各々独立して真空排気および圧力制御を可
能としたことを特徴とする真空浮揚溶解装置。6. A vacuum levitation melting apparatus according to claim 1, wherein the material supply chamber, the molding chamber and the melting chamber can be independently evacuated and controlled in pressure. Characteristic vacuum levitation melting equipment.
の真空浮揚溶解装置において、材料供給室が大気圧下で
材料供給室の扉を開け室内の溶解材料供給装置に導電性
の被溶解材料を供給し、材料供給後は、真空排気系によ
り、材料供給室を真空引きし、材料供給室から溶解室内
のるつぼに材料を供給する際、高真空領域の溶解室圧力
を不活性ガスを導入して、材料供給室の圧力と同レベル
にした後、第一の真空仕切弁を開き材料供給室内の溶解
材料供給装置から材料投入し、材料投入終了後は第一の
真空仕切弁を閉じて溶解室を真空排気系で高真空領域ま
で真空引きして規定の圧力を確保した後、溶解を開始
し、材料供給室は不活性ガスを導入して大気圧に戻し次
回投入材料の受入れに備え、溶解された溶湯を次工程の
金型に注型する際は、まず、高真空領域の溶解室圧力を
不活性ガスを導入して、成形室の圧力と同レベルにした
後、真空溶解室と成形室との間の第二の真空仕切弁を開
き、次に溶解室内のるつぼ底部の流出口を塞ぐ栓を、栓
開閉機構により、成形室内金型の昇降移動範囲から退避
した位置まで移動し、栓移動完了と同時に、成形室内の
金型を、昇降機構でるつぼ流出口近傍まで上昇させて溶
湯を注型し、注型後は、金型を昇降機構で定位値へ戻し
第二の真空仕切弁を閉じ、第二の真空仕切弁を閉じた後
溶解室は、真空排気系で再び高真空領域まで真空引き
し、次の溶解作業に備え、成形室は不活性ガスを導入し
大気圧状態で冷却した後、金型を取り出し、金型を取り
出した後の成形室は、新たに次の金型を設置し、真空排
気系で規定圧力まで真空引きし、次の溶解作業に備える
ようにしたことを特徴とする真空浮揚溶解装置の溶解お
よび出湯方法。7. A vacuum levitation melting apparatus according to claim 1, wherein the material supply chamber opens a door of the material supply chamber under atmospheric pressure, and a conductive material is supplied to the molten material supply apparatus in the chamber. After supplying the molten material, after the material is supplied, the material supply chamber is evacuated by the vacuum evacuation system, and when the material is supplied from the material supply chamber to the crucible in the melting chamber, the pressure of the melting chamber in the high vacuum region is increased by an inert gas. After bringing the pressure to the same level as the pressure in the material supply chamber, the first vacuum gate valve is opened and the material is supplied from the melted material supply device in the material supply chamber. After closing, the melting chamber is evacuated to a high vacuum area with a vacuum exhaust system to secure the specified pressure, melting is started, the material supply chamber is returned to atmospheric pressure by introducing an inert gas, and the next input material is received. When casting the molten metal into the mold of the next process, First, an inert gas is introduced into the melting chamber pressure in the high vacuum region to make it the same level as the pressure in the molding chamber, and then the second vacuum gate valve between the vacuum melting chamber and the molding chamber is opened. The stopper that closes the outlet at the bottom of the crucible in the melting chamber is moved by the stopper opening / closing mechanism to a position retracted from the vertical movement range of the mold in the molding chamber, and simultaneously with the completion of the stopper movement, the mold in the molding chamber is moved by the elevator mechanism. The molten metal is cast by raising the vicinity of the crucible outlet, and after casting, the mold is returned to the localization value by the elevating mechanism, the second vacuum gate valve is closed, and after the second vacuum gate valve is closed, the melting chamber is closed. After the vacuum evacuation system again evacuated to the high vacuum area, the molding chamber was introduced with an inert gas and cooled at atmospheric pressure, and the mold was taken out. In the molding chamber, the next mold is newly installed, and the vacuum evacuation system is evacuated to the specified pressure. Dissolution and tapping methods of the vacuum levitation melting apparatus being characterized in that as provided in the work.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19379896A JPH1038466A (en) | 1996-07-24 | 1996-07-24 | Vacuum float dissolving apparatus and dissolving and casting method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP19379896A JPH1038466A (en) | 1996-07-24 | 1996-07-24 | Vacuum float dissolving apparatus and dissolving and casting method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH1038466A true JPH1038466A (en) | 1998-02-13 |
Family
ID=16313960
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP19379896A Withdrawn JPH1038466A (en) | 1996-07-24 | 1996-07-24 | Vacuum float dissolving apparatus and dissolving and casting method |
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JP (1) | JPH1038466A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011050976A (en) * | 2009-08-31 | 2011-03-17 | Nishikimi Chuzo Kk | Method for manufacturing thin plate-like product of spherical graphite cast iron |
JP2013002639A (en) * | 2011-06-10 | 2013-01-07 | Wen Yuan Chang | Partition type reduction method for metallurgy and facility for the same |
CN104406406A (en) * | 2014-11-05 | 2015-03-11 | 镁联科技(芜湖)有限公司 | Metal melting plant |
CN104697331A (en) * | 2013-12-04 | 2015-06-10 | 中国科学院上海高等研究院 | Semiconductor material preparation equipment |
CN113624005A (en) * | 2020-05-07 | 2021-11-09 | 沈阳铸造研究所有限公司 | Large-capacity continuous casting multifunctional suspension smelting furnace and alloy smelting method |
-
1996
- 1996-07-24 JP JP19379896A patent/JPH1038466A/en not_active Withdrawn
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011050976A (en) * | 2009-08-31 | 2011-03-17 | Nishikimi Chuzo Kk | Method for manufacturing thin plate-like product of spherical graphite cast iron |
JP2013002639A (en) * | 2011-06-10 | 2013-01-07 | Wen Yuan Chang | Partition type reduction method for metallurgy and facility for the same |
CN104697331A (en) * | 2013-12-04 | 2015-06-10 | 中国科学院上海高等研究院 | Semiconductor material preparation equipment |
CN104697331B (en) * | 2013-12-04 | 2019-04-23 | 中国科学院上海高等研究院 | Semiconductor material Preparation equipment |
CN104406406A (en) * | 2014-11-05 | 2015-03-11 | 镁联科技(芜湖)有限公司 | Metal melting plant |
CN113624005A (en) * | 2020-05-07 | 2021-11-09 | 沈阳铸造研究所有限公司 | Large-capacity continuous casting multifunctional suspension smelting furnace and alloy smelting method |
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