JP2004314121A - Device for melting and casting metal - Google Patents

Device for melting and casting metal Download PDF

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Publication number
JP2004314121A
JP2004314121A JP2003111032A JP2003111032A JP2004314121A JP 2004314121 A JP2004314121 A JP 2004314121A JP 2003111032 A JP2003111032 A JP 2003111032A JP 2003111032 A JP2003111032 A JP 2003111032A JP 2004314121 A JP2004314121 A JP 2004314121A
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Japan
Prior art keywords
metal
mold
casting
plug
melting
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JP2003111032A
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Japanese (ja)
Inventor
Noboru Demukai
登 出向井
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Daido Steel Co Ltd
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Daido Steel Co Ltd
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Priority to JP2003111032A priority Critical patent/JP2004314121A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a practical device for melting and casting metal in which the metal levitation-melted in a levitation melting furnace is drawn in turn into a mold provided under the furnace and is solidified so as to be cast smoothly without difficulty. <P>SOLUTION: In the metal solution casting device in which the metal levitation-melted in the levitation melting furnace is cast by being drawn in turn into the mold provided under the furnace and being solidified, the upper portion at least of the mold is formed with a plurality of water-cooled cylindrical copper segments which are insulated from each other and coils are placed around the outer circumference of the water-cooled copper segments. At the time of casting by drawing the metal levitation-melted in the levitation melting furnace into the mold in turn and solidifying it, a high-frequency current is supplied to the coils so as to induction-heat the coils so that Lorentz repulsive force generated at that time separates the molten metal from the inner wall face of the upper portion of the mold. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は金属の溶解鋳造装置に関し、更に詳しくはレビテーション溶解炉と、該レビテーション溶解炉の下部に取付けられた筒状の鋳型と、該鋳型に昇降可能に摺嵌された栓体とを備え、該レビテーション溶解炉で浮揚溶解した金属の溶湯を該鋳型内へ順次引き込んで凝固させることにより鋳造するようにした金属の溶解鋳造装置に関する。
【0002】
【従来の技術】
従来、前記のような金属の溶解鋳造装置として、レビテーション溶解炉(コールドクルーシブル溶解炉ともいう)と、該レビテーション溶解炉の下部に取付けられた鋳型と、該鋳型に昇降可能に摺嵌された栓体とを備えるものが知られている(例えば特許文献1参照)。この従来装置では、先ずレビテーション溶解炉を構成する炉本体の外周回りに配置されたコイルへ高周波電流を流して誘導加熱し、この際に発生するローレンツ斥力により、該炉本体内へ装入した金属を浮揚溶解する。この段階では、栓体は上昇しており、レビテーション溶解炉の炉底の一部を形成していて、該レビテーション溶解炉の炉本体内には金属が浮揚した状態で溶解しているが、炉底には凝固シェルが形成されている。次に栓体を順次下降させ、レビテーション溶解炉の炉本体内の溶湯を鋳型内へ順次引き込んで冷却凝固させるというものである。
【0003】
しかし、前記の従来装置では、栓体を下降させて鋳型内へ引き込んだ溶湯が該鋳型の内壁面で直ちに凝固し、これが炉底に残存する凝固シェルや該栓体の上面の凝固物と連なって一体化するため、かかる栓体を順次下降させ、溶湯を鋳型内へ順次引き込んで冷却凝固させることそれ自体が実際のところ誠に難しい。前記の従来装置では、鋳型の上端部の外周回りにコイルを配置し、該コイルへ高周波電流を流して誘導加熱することにより、レビテーション溶解炉の炉本体から該鋳型内へ引き込む溶湯が直ちには凝固しないようにすることも提案されているが、実際にこのようにしようとすると、該コイルへ大容量の高周波電流を流す必要があり、装置面において、また経済面において、実用装置としては著しく不都合である。
【0004】
【特許文献1】
特開2002−192332号
【0005】
【発明が解決しようとする課題】
本発明が解決しようとする課題は、レビテーション溶解炉と、該レビテーション溶解炉の下部に取付けられた鋳型と、該鋳型に昇降可能に摺嵌された栓体とを備え、該レビテーション溶解炉で浮揚溶解した金属の溶湯を該鋳型内へ順次引き込んで凝固させることにより鋳造するようにした金属の溶解鋳造装置において、金属の溶湯を鋳型内へ順次引き込み、そして凝固させることによる鋳造を無理なく円滑に行なうことができる実用的な装置を提供する処にある。
【0006】
【課題を解決するための手段】
前記の課題を解決する本発明は、レビテーション溶解炉と、該レビテーション溶解炉の下部に取付けられた筒状の鋳型と、該鋳型に昇降可能に摺嵌された栓体とを備え、該レビテーション溶解炉で浮揚溶解した金属の溶湯を該鋳型内へ順次引き込んで凝固させることにより鋳造するようにした金属の溶解鋳造装置において、該鋳型の少なくとも上部が相互に絶縁されて筒状に立設された複数の水冷銅製セグメントで形状されており、これらの水冷銅製セグメントの外周回りにコイルが配置されていて、該レビテーション溶解炉で浮揚溶解した金属の溶湯を該鋳型内へ順次引き込んで凝固させる鋳造時に、該コイルへ高周波電流を流して誘導加熱し、この際に発生するローレンツ斥力により、該溶湯を該鋳型の上部にてその内壁面から離すようにして成ることを特徴とする金属の溶解鋳造装置に係る。
【0007】
本発明に係る金属の溶解鋳造装置も、レビテーション溶解炉と、該レビテーション溶解炉の下部に取付けられた鋳型と、該鋳型に昇降可能に摺嵌された栓体とを備えている。レビテーション溶解炉は、相互に絶縁されて筒状に立設された複数の水冷銅製セグメントからなる炉本体と、該炉本体の外周回りに配置されたコイルとを備え、該コイルへ高周波電流を流して誘導加熱し、この際に発生するローレンツ斥力により、該炉本体内へ装入した金属を浮揚溶解するようになっている。
【0008】
本発明に係る金属の溶解鋳造装置では、鋳型の少なくとも上部が相互に絶縁されて筒状に立設された複数の水冷銅製セグメントで形成されており、これらの水冷銅製セグメントの外周回りにコイルが配置されていて、レビテーション溶解炉で浮揚溶解した金属の溶湯を該鋳型内へ順次引き込んで凝固させる鋳造時に、該コイルへ高周波電流を流して誘導加熱し、この際に発生するローレンツ斥力により、該溶湯を該鋳型の上部の内壁面から離すようになっている。鋳型の少なくとも上部は、前記したレビテーション溶解炉と同様の構成になっているのである。
【0009】
レビテーション溶解炉で浮揚溶解した金属の溶湯を鋳型内へ順次引き込んで凝固させる鋳造時に、該溶湯を該鋳型の上部でその内壁面から離すと、該レビテーション溶解炉の炉底に残存する凝固シェルと、栓体の上部において該鋳型内に形成される凝固物すなわち鋳造物とを切り離すことができるため、鋳造を無理なく円滑に行なうことができる。
【0010】
本発明に係る金属の溶解鋳造装置において、鋳型はその全部を相互に絶縁されて筒状に立設された複数の水冷銅製セグメントで形成するのが好ましい。鋳型の全部を前記したレビテーション溶解炉と同様の構成にするのが好ましいのである。このようにすると、鋳型内へ順次引き込んだ溶湯の冷却による凝固を促すと共に、得られる鋳造物の該鋳型に起因する汚染を少なくすることができる。
【0011】
また栓体にはその昇降方向へ副栓体を螺合し、該栓体に対し該副栓体を回して下降させることにより、双方の間に凹部が形成されるようにするのが好ましい。このようにすると、詳しくは後述するように、鋳造開始時において溶湯の凝固物を凹部へからめとることができるため、その後の鋳造中において栓体を下降させることによる鋳造物の引き抜きをより確実に行なうことができる。
【0012】
更に栓体や副栓体は共に水冷銅製のものとするのが好ましい。このようにすると、とりわけ鋳造開始時において栓体や副栓体と接触することとなる溶湯の冷却による凝固を促すと共に、得られる鋳造物の該栓体や該副栓体に起因する汚染を少なくすることができる。
【0013】
【発明の実施の形態】
図1は本発明に係る金属の溶解鋳造装置をその使用状態を含めて例示する縦断面図である。図示した金属の溶解鋳造装置は、レビテーション溶解炉11と、レビテーション溶解炉11の下部に取付けられた筒状の鋳型21と、鋳型21に昇降可能に摺嵌された栓体31とを備えている。レビテーション溶解炉11は、相互に絶縁されて筒状に立設された複数の水冷銅製セグメント12,12・・からなる炉本体13と、炉本体13の外周回りに配置されたコイル14とを備えている。
【0014】
鋳型21は、炉本体13と同様に構成されており、相互に絶縁されて筒状に立設された複数の水冷銅製セグメント22,22・・で形成されている。各水冷銅製セグメント22,22・・は水平部23,23・・とこれに連なる垂直部24,24・・とからなっていて、結果として水平部23,23・・が炉本体13の炉底の一部を形成しており、垂直部24,24・・が鋳造部を形成している。垂直部24,24・・で形成される鋳造部の上部の外周回りにはコイル25が配置されている。栓体31の中央部にはその昇降方向へ副栓体32が螺合されており、栓体31に対し副栓体32を回して下降させることにより双方の間に凹部が形成されるようになっていて、これらは共に、図示を省略するが、水冷銅製のものからなっている。詳しくは後述するが、図1は図6と同じ使用状態を示している。
【0015】
図2〜図7は図1について前述した本発明に係る金属の溶解鋳造装置を用いて金属を溶解鋳造する状態をその手順を追って略示する縦断面図である。これらのうちで図2は、金属の浮揚溶解中の状態を示している。図2では、コイル14へ高周波電流を流して誘導加熱し、この際に発生するローレンツ斥力により、レビテーション溶解炉11の炉本体13内へ装入した金属を浮揚溶解している。この段階では、栓体31及び副栓体32は上昇位置にあり、これらの上面は同一平面を形成していて、鋳型21の水平部23,23・・と栓体31及び副栓体32の上面とで炉底が形成されている。炉本体13内には金属の溶湯Aが浮揚した状態になっており、炉底には凝固シェルBが形成されている。
【0016】
図3は浮揚溶解した金属の溶湯の鋳造開始直前の状態を示している。図3では、栓体31及び副栓体32はやや下降位置にあり、副栓体32は栓体31よりも下降位置にあって、双方の間に凹部33が形成されている。
【0017】
図4は金属の溶湯の鋳造開始時の状態を示している。図4では、栓体31及び副栓体32による冷却を直接には受けなくなった炉底部の凝固シェルBの一部が溶湯Aの自熱により溶解し、そこから鋳型21の垂直部24,24・・内へ溶湯Aが自重流下し始めている。
【0018】
図5は金属の溶湯の鋳造開始直後の状態を示している。図5では自重流下した溶湯Aの一部が栓体31と副栓体32との間に形成されている前記した凹部33に到り、ここで凝固して、その凝固物Cが凹部33にからめとられている。凝固物Cの上部には溶湯Aが連なっているが、この段階では、コイル25へ高周波電流を流して誘導加熱し、この際に発生するローレンツ斥力により、溶湯Aは鋳型21の垂直部24,24・・の上部においてその内壁面から離されている。コイル25よりも上方における垂直部24,24・・の上端部の内壁面には該内壁面で冷却された溶湯Aの凝固物Dが形成されており、凝固物Dは炉底に残存する凝固シェルBと連なって一体化しているが、前記のようにコイル25の位置で溶湯Aが垂直部24,24・・の内壁面から離されているので、凝固物Cはこれらの凝固シェルBや凝固物Dと連なって一体化することはなく、切り離されている。
【0019】
図6は金属の溶湯の鋳造中の状態を示している。図6では、栓体31及び副栓体32は順次下降した位置にあり、凝固物Cは順次成長していて、栓体31及び副栓体32により凝固物Cを順次下方へ引き抜いている。前記したように、図6は図1と同じ状態を示している。
【0020】
図7は金属の溶湯の鋳造終了直前の状態を示している。図7では、栓体31及び副栓体32により凝固物Cを更に順次下方へ引き抜いている。この段階では、凝固物Cはほぼ所望の鋳造物の形となっており、その上部には残存する少量の溶湯Aが連なっている。最終的には、残存する少量の溶湯Aも凝固物Cとなし、鋳型21から引き出して、栓体31及び副栓体32と分離する。
【0021】
【発明の効果】
既に明らかなように、以上説明した本発明には、レビテーション溶解炉で浮揚溶解した金属の溶湯を下部に取付けられた鋳型内へ順次引き込んで凝固させることにより鋳造するようにした金属の溶解鋳造装置において、金属の溶湯を鋳型内へ順次引き込み、そして凝固させることによる鋳造を無理なく円滑に行なうことができるという効果がある。
【図面の簡単な説明】
【図1】本発明に係る金属の溶解鋳造装置をその使用状態を含めて例示する縦断面図。
【図2】図1と同じ本発明に係る金属の溶解鋳造装置を用いて金属を溶解鋳造するときの金属の浮揚溶解中の状態を示す縦断面図。
【図3】図1と同じ本発明に係る金属の溶解鋳造装置を用いて金属を溶解鋳造するときの浮揚溶解した金属の溶湯の鋳造開始直前の状態を示す縦断面図。
【図4】図1と同じ本発明に係る金属の溶解鋳造装置を用いて金属を溶解鋳造するときの金属の溶湯の鋳造開始時の状態を示す縦断面図。
【図5】図1と同じ本発明に係る金属の溶解鋳造装置を用いて金属を溶解鋳造するときの金属の溶湯の鋳造開始直後の状態を示す縦断面図。
【図6】図1と同じ本発明に係る金属の溶解鋳造装置を用いて金属を溶解鋳造するときの金属の溶湯の鋳造中の状態を示す縦断面図。
【図7】図1と同じ本発明に係る金属の溶解鋳造装置を用いて金属を溶解鋳造するときの金属の溶湯の鋳造終了直前の状態を示す縦断面図。
【符号の説明】
11・・レビテーション溶解炉、12,22・・水冷銅製セグメント、13・・炉本体、14,25・・コイル、21・・鋳型、31・・栓体、32・・副栓体、A・・溶湯、B・・凝固シェル、C,D・・凝固物
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a metal melting and casting apparatus, and more specifically, a levitation melting furnace, a cylindrical mold attached to a lower part of the levitation melting furnace, and a plug which is slidably fitted to the mold so as to be able to move up and down. The present invention relates to an apparatus for melting and casting a metal, the molten metal being floated and melted in the levitation melting furnace being sequentially drawn into the mold and solidified for casting.
[0002]
[Prior art]
Conventionally, as a metal melting and casting apparatus as described above, a levitation melting furnace (also referred to as a cold crucible melting furnace), a mold attached to a lower part of the levitation melting furnace, and a sliding fit which is vertically movable on the mold. There is known a device provided with a plug body (see, for example, Patent Document 1). In this conventional apparatus, first, a high-frequency current is applied to a coil disposed around the outer periphery of a furnace body constituting a revitation melting furnace to perform induction heating, and the coil is charged into the furnace body by Lorentz repulsion generated at this time. Levitate and dissolve the metal. At this stage, the plug is raised and forms a part of the furnace bottom of the levitation melting furnace, and the metal is melted in a floating state in the furnace body of the levitation melting furnace. A solidified shell is formed at the bottom of the furnace. Next, the plug is sequentially lowered, and the molten metal in the furnace body of the levitation melting furnace is sequentially drawn into the mold to be cooled and solidified.
[0003]
However, in the conventional apparatus described above, the molten metal drawn down into the mold by lowering the plug is immediately solidified on the inner wall surface of the mold, and this solidifies with the solidified shell remaining on the furnace bottom and the solidified material on the upper surface of the plug. Therefore, it is actually very difficult to lower the plug body one by one and sequentially draw the molten metal into the mold to solidify by cooling. In the above-described conventional apparatus, a coil is disposed around the outer periphery of the upper end of the mold, and a high-frequency current is applied to the coil to perform induction heating, so that the molten metal drawn into the mold from the furnace body of the levitation melting furnace is immediately formed. Although it has been proposed to prevent coagulation, it is necessary to supply a large amount of high-frequency current to the coil in order to do so, which is remarkable as a practical device in terms of equipment and economy. It is inconvenient.
[0004]
[Patent Document 1]
JP-A-2002-192332 [0005]
[Problems to be solved by the invention]
The problem to be solved by the present invention is to provide a levitation melting furnace, a mold attached to a lower part of the levitation melting furnace, and a plug which is slidably fitted to the mold so as to be able to move up and down. In a metal melting and casting apparatus in which a molten metal floated and melted in a furnace is cast by sequentially drawing into the mold and solidifying, it is impossible to cast the molten metal by sequentially drawing the molten metal into the mold and solidifying the molten metal. The present invention is to provide a practical device that can be performed smoothly without any problem.
[0006]
[Means for Solving the Problems]
The present invention that solves the above-mentioned problems includes a levitation melting furnace, a cylindrical mold attached to a lower part of the levitation melting furnace, and a stopper that is slidably fitted to the mold so as to be able to move up and down. In a metal melting and casting apparatus in which a molten metal floated and melted in a levitation melting furnace is sequentially drawn into the mold and solidified and cast, at least the upper portions of the mold are insulated from each other and stand in a cylindrical shape. It is shaped by a plurality of water-cooled copper segments provided, a coil is arranged around the outer periphery of these water-cooled copper segments, and the molten metal of the metal levitated and melted in the levitation melting furnace is sequentially drawn into the mold. At the time of solidification casting, a high-frequency current is applied to the coil for induction heating, and the Lorentz repulsion generated at this time causes the molten metal to be separated from its inner wall surface at the top of the mold. And according to the melting and casting apparatus of the metal which is characterized by comprising.
[0007]
An apparatus for melting and casting a metal according to the present invention also includes a levitation melting furnace, a mold attached to a lower part of the levitation melting furnace, and a plug body which is slidably fitted to the mold so as to be able to move up and down. The levitation melting furnace is provided with a furnace body composed of a plurality of water-cooled copper segments that are insulated from each other and that are erected in a cylindrical shape, and a coil that is arranged around the outer periphery of the furnace body, and supplies a high-frequency current to the coil. The metal is heated by induction and the Lorentz repulsion generated at this time causes the metal charged in the furnace body to float and melt.
[0008]
In the metal melting and casting apparatus according to the present invention, at least the upper part of the mold is formed of a plurality of water-cooled copper segments which are insulated from each other and are erected in a cylindrical shape, and a coil is formed around the outer periphery of these water-cooled copper segments. It is arranged, at the time of casting to draw the molten metal of the metal levitated and melted in the levitation melting furnace sequentially into the mold and solidify, high-frequency current is applied to the coil for induction heating, and the Lorentz repulsion generated at this time, The molten metal is separated from the upper inner wall surface of the mold. At least the upper part of the mold has the same configuration as the above-mentioned levitation melting furnace.
[0009]
At the time of casting, in which the molten metal of the metal levitated and melted in the levitation melting furnace is sequentially drawn into the mold and solidified, if the molten metal is separated from the inner wall surface at the top of the mold, the solidification remaining at the furnace bottom of the levitation melting furnace Since the shell and the solidified material formed in the mold at the upper part of the plug, that is, the casting, can be separated, the casting can be performed smoothly and smoothly.
[0010]
In the apparatus for melting and casting a metal according to the present invention, it is preferable that the entire mold is formed of a plurality of water-cooled copper segments which are insulated from each other and are erected in a cylindrical shape. It is preferable that the entire mold has the same configuration as that of the above-described levitation melting furnace. By doing so, it is possible to promote solidification by cooling of the molten metal sequentially drawn into the mold, and to reduce contamination of the obtained casting due to the mold.
[0011]
It is preferable that a sub-plug is screwed into the plug in the ascending and descending direction, and the sub-plug is turned and lowered with respect to the plug, so that a concave portion is formed between the two. By doing so, as will be described in detail later, since the solidified material of the molten metal can be entangled into the concave portion at the start of casting, the casting can be more reliably pulled out by lowering the plug during the subsequent casting. Can do it.
[0012]
Further, it is preferable that both the plug and the sub-plug are made of water-cooled copper. By doing so, the solidification by cooling the molten metal which comes into contact with the plug and the sub-plug particularly at the start of casting is promoted, and contamination of the obtained casting due to the plug and the sub-plug is reduced. can do.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a vertical cross-sectional view illustrating a metal melting and casting apparatus according to the present invention including its use state. The illustrated metal melting and casting apparatus includes a levitation melting furnace 11, a cylindrical mold 21 attached to a lower part of the levitation melting furnace 11, and a plug 31 slidably fitted to the mold 21 so as to be able to move up and down. ing. The levitation melting furnace 11 includes a furnace body 13 composed of a plurality of water-cooled copper segments 12, 12..., Which are insulated from each other and are erected in a cylindrical shape, and a coil 14 arranged around the outer periphery of the furnace body 13. Have.
[0014]
The mold 21 is configured in the same manner as the furnace body 13 and is formed of a plurality of water-cooled copper segments 22, 22... Each of the water-cooled copper segments 22, 22 is composed of horizontal portions 23, 23 and vertical portions 24, 24,... Connected thereto, so that the horizontal portions 23, 23,. Are formed, and the vertical portions 24 form a cast portion. A coil 25 is arranged around the outer periphery of the upper part of the cast part formed by the vertical parts 24, 24. A sub-plug 32 is screwed into the center of the plug 31 in the ascending / descending direction, and the sub-plug 32 is rotated with respect to the plug 31 to be lowered so that a concave portion is formed therebetween. Although not shown, these are made of water-cooled copper. Although details will be described later, FIG. 1 shows the same use state as FIG.
[0015]
2 to 7 are longitudinal sectional views schematically showing a state of melting and casting metal using the apparatus for melting and casting metal according to the present invention described above with reference to FIG. Among them, FIG. 2 shows a state during flotation melting of the metal. In FIG. 2, a high-frequency current is supplied to the coil 14 for induction heating, and the metal charged into the furnace body 13 of the levitation melting furnace 11 is floated and melted by Lorentz repulsion generated at this time. At this stage, the plug 31 and the sub-plug 32 are in the raised position, and the upper surfaces thereof form the same plane, and the horizontal portions 23, 23,. A furnace bottom is formed with the upper surface. The molten metal A is floated in the furnace body 13, and a solidified shell B is formed at the furnace bottom.
[0016]
FIG. 3 shows a state immediately before the start of casting of the molten metal that has been floated and melted. In FIG. 3, the plug 31 and the sub-plug 32 are at a slightly lowered position, the sub-plug 32 is at a lowered position than the plug 31, and a concave portion 33 is formed between both.
[0017]
FIG. 4 shows a state at the start of casting of a molten metal. In FIG. 4, a part of the solidified shell B at the bottom of the furnace, which has not been directly cooled by the plug 31 and the sub plug 32, is melted by the self-heating of the molten metal A, and the vertical portions 24, 24・ ・ Molten metal A is starting to flow under its own weight.
[0018]
FIG. 5 shows a state immediately after the start of casting of the molten metal. In FIG. 5, a part of the molten metal A that has flowed down by its own weight reaches the above-described concave portion 33 formed between the plug 31 and the sub-plug 32, where it solidifies. It is taken off. The molten metal A is connected to the upper part of the solidified material C. At this stage, a high-frequency current is applied to the coil 25 to perform induction heating. 24. It is separated from the inner wall surface at the upper part. The solidified material D of the molten metal A cooled on the inner wall surface is formed on the inner wall surface at the upper end of the vertical portions 24, 24,... Above the coil 25, and the solidified material D remains on the furnace bottom. Since the molten metal A is separated from the inner wall surfaces of the vertical portions 24 at the position of the coil 25 as described above, the solidified material C is separated from these solidified shells B and They are not integrated with the coagulated material D but are separated.
[0019]
FIG. 6 shows a state during casting of the molten metal. In FIG. 6, the plug 31 and the sub-plug 32 are in the sequentially lowered position, the coagulated material C is growing sequentially, and the plug 31 and the sub-plug 32 are sequentially pulling out the coagulated product C downward. As described above, FIG. 6 shows the same state as FIG.
[0020]
FIG. 7 shows a state immediately before the end of the casting of the molten metal. In FIG. 7, the solidified material C is further sequentially pulled downward by the plug 31 and the sub plug 32. At this stage, the solidified product C is almost in the form of a desired cast product, and a small amount of the remaining molten metal A is connected to the upper portion thereof. Eventually, a small amount of the remaining molten metal A is also turned into a coagulated material C, pulled out from the mold 21 and separated from the plug 31 and the auxiliary plug 32.
[0021]
【The invention's effect】
As already apparent, in the present invention described above, the molten metal of the metal floated and melted in the levitation melting furnace is sequentially cast into a mold attached to the lower part and solidified by casting. In the apparatus, there is an effect that casting can be smoothly and smoothly performed by sequentially drawing the molten metal into the mold and solidifying it.
[Brief description of the drawings]
FIG. 1 is a vertical cross-sectional view illustrating a metal melting and casting apparatus according to the present invention including its use state.
FIG. 2 is a vertical cross-sectional view showing a state in which the metal is being floated and melted when melting and casting the metal using the same metal melting and casting apparatus according to the present invention as in FIG. 1;
FIG. 3 is a longitudinal sectional view showing a state immediately before the start of casting of a molten metal of buoyant molten metal when melting and casting a metal using the same apparatus for melting and casting a metal according to the present invention as in FIG. 1;
FIG. 4 is a longitudinal sectional view showing a state at the start of casting of a molten metal when melting and casting a metal using the same apparatus for melting and casting a metal according to the present invention as in FIG. 1;
FIG. 5 is a longitudinal sectional view showing a state immediately after the start of casting of a molten metal when melting and casting a metal using the same apparatus for melting and casting a metal according to the present invention as in FIG. 1;
FIG. 6 is a longitudinal sectional view showing a state during casting of a molten metal when melting and casting a metal using the same apparatus for melting and casting a metal according to the present invention as in FIG. 1;
FIG. 7 is a longitudinal sectional view showing a state immediately before the end of casting of a molten metal when melting and casting a metal using the same apparatus for melting and casting a metal according to the present invention as in FIG. 1;
[Explanation of symbols]
11. Levitation melting furnace, 12, 22, water-cooled copper segment, 13, furnace body, 14, 25, coil, 21, mold, 31 plug, 32 plug, A plug・ Molten metal, B ・ ・ Solid shell, C, D ・ ・ Solid

Claims (5)

レビテーション溶解炉と、該レビテーション溶解炉の下部に取付けられた筒状の鋳型と、該鋳型に昇降可能に摺嵌された栓体とを備え、該レビテーション溶解炉で浮揚溶解した金属の溶湯を該鋳型内へ順次引き込んで凝固させることにより鋳造するようにした金属の溶解鋳造装置において、該鋳型の少なくとも上部が相互に絶縁されて筒状に立設された複数の水冷銅製セグメントで形状されており、これらの水冷銅製セグメントの外周回りにコイルが配置されていて、該レビテーション溶解炉で浮揚溶解した金属の溶湯を該鋳型内へ順次引き込んで凝固させる鋳造時に、該コイルへ高周波電流を流して誘導加熱し、この際に発生するローレンツ斥力により、該溶湯を該鋳型の上部にてその内壁面から離すようにして成ることを特徴とする金属の溶解鋳造装置。A levitation melting furnace, a cylindrical mold attached to the lower part of the levitation melting furnace, and a plug that is slidably fitted to the mold so as to be able to move up and down. In a metal melting and casting apparatus in which a molten metal is sequentially drawn into the mold and solidified to cast the metal, at least an upper portion of the mold is insulated from each other and is formed by a plurality of water-cooled copper segments which are erected in a cylindrical shape. A coil is arranged around the outer periphery of these water-cooled copper segments, and a high-frequency current is applied to the coil during casting in which the molten metal of the metal levitated and melted in the levitation melting furnace is sequentially drawn into the mold and solidified. Wherein the molten metal is separated from its inner wall surface at the upper part of the mold by Lorentz repulsion generated at this time. Melting and casting equipment. 鋳型の全部が相互に絶縁されて筒状に立設された複数の水冷銅製セグメントで形成されており、該鋳型の上部の外周回りにコイルが配置された請求項1記載の金属の溶解鋳造装置。2. The apparatus for melting and casting metal according to claim 1, wherein the entire mold is formed of a plurality of water-cooled copper segments which are insulated from each other and are erected in a cylindrical shape, and a coil is arranged around an outer periphery of an upper portion of the mold. . 栓体にその昇降方向へ副栓体が螺合されていて、該栓体に対し該副栓体を下降させることにより、双方の間に凹部が形成されるようにした請求項1又は2記載の金属の溶解鋳造装置。3. A sub-plug is screwed to the plug in a direction of elevating the plug, and the sub-plug is lowered with respect to the plug to form a concave portion between the two. Metal melting and casting equipment. 副栓体が水冷銅製のものである請求項3記載の金属の溶解鋳造装置。4. The metal melting and casting apparatus according to claim 3, wherein the auxiliary plug is made of water-cooled copper. 栓体が水冷銅製のものである請求項1〜4のいずれか一つの項記載の金属の溶解鋳造装置。The metal melting and casting apparatus according to any one of claims 1 to 4, wherein the stopper is made of water-cooled copper.
JP2003111032A 2003-04-16 2003-04-16 Device for melting and casting metal Pending JP2004314121A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007218483A (en) * 2006-02-15 2007-08-30 Kobe Steel Ltd Cold crucible induction melting device
CN102445075A (en) * 2011-12-15 2012-05-09 邹建明 Heating recycling method and device of medium frequency induction roaster

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007218483A (en) * 2006-02-15 2007-08-30 Kobe Steel Ltd Cold crucible induction melting device
CN102445075A (en) * 2011-12-15 2012-05-09 邹建明 Heating recycling method and device of medium frequency induction roaster

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