JPS6321915Y2 - - Google Patents
Info
- Publication number
- JPS6321915Y2 JPS6321915Y2 JP4007484U JP4007484U JPS6321915Y2 JP S6321915 Y2 JPS6321915 Y2 JP S6321915Y2 JP 4007484 U JP4007484 U JP 4007484U JP 4007484 U JP4007484 U JP 4007484U JP S6321915 Y2 JPS6321915 Y2 JP S6321915Y2
- Authority
- JP
- Japan
- Prior art keywords
- pouring
- pouring nozzle
- furnace body
- crucible
- furnace
- 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.)
- Expired
Links
- 230000006698 induction Effects 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000000696 magnetic material Substances 0.000 claims description 5
- 239000011819 refractory material Substances 0.000 claims description 5
- 238000013459 approach Methods 0.000 claims 1
- 239000002184 metal Substances 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 12
- 230000004907 flux Effects 0.000 description 8
- 230000005284 excitation Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 239000003779 heat-resistant material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
Landscapes
- General Induction Heating (AREA)
Description
【考案の詳細な説明】
〔考案の属する技術分野〕
この考案はるつぼ形炉体の底部に注湯口を設け
た誘導炉において、注湯口での溶湯の固化を防止
することができるように改良したものに関する。[Detailed description of the invention] [Technical field to which the invention pertains] This invention is an induction furnace in which a pouring spout is provided at the bottom of a crucible-shaped furnace body, which has been improved to prevent solidification of molten metal at the pouring spout. related to things.
るつぼ形炉体の底部に注湯口を設ける誘導炉で
は、一般に注湯口を有する注湯ノズルをアルミナ
等の耐熱材で形成していたが、アルミナは非磁性
で誘導加熱コイルの励磁に伴う磁束が注湯ノズル
を通つて流れないので注湯ノズルの温度が低下し
て注湯時に注湯口での溶湯の固化することがある
という欠点があつた。
In induction furnaces that have a pouring spout at the bottom of the crucible-shaped furnace body, the pouring nozzle with the pouring spout is generally made of a heat-resistant material such as alumina, but alumina is non-magnetic and the magnetic flux caused by the excitation of the induction heating coil is Since the molten metal does not flow through the pouring nozzle, the temperature of the pouring nozzle may drop, and the molten metal may solidify at the pouring port during pouring.
この考案は前記の欠点を除去するために、炉体
底部の注湯口での溶湯の固化を防止することがで
きるようにしたるつぼ形誘導炉を提供することを
目的とする。
The object of this invention is to provide a crucible-type induction furnace that can prevent the solidification of molten metal at the pouring hole at the bottom of the furnace body, in order to eliminate the above-mentioned drawbacks.
この考案は前記の目的を達成するために、筒状
の注湯ノズルを磁性材で形成するとともに、上下
方向の継鉄の下端部を折り曲げ形成して先端面を
前記注湯ノズルの下端部に接近させることにより
誘導加熱コイルの励磁に伴う磁束を注湯ノズルに
通して注湯ノズルを加熱するようにしたものであ
る。
In order to achieve the above-mentioned object, this invention forms a cylindrical pouring nozzle from a magnetic material, and also bends the lower end of the vertical yoke so that the tip surface is aligned with the lower end of the pouring nozzle. By bringing them closer together, the magnetic flux generated by the excitation of the induction heating coil is passed through the pouring nozzle to heat the pouring nozzle.
第1図および第2図はこの考案の実施例を示す
もので、耐火材からなるるつぼ形炉体1の外周に
誘導加熱コイル2が巻装され、このコイル2は外
側から複数の上下方向の継鉄3で支持されてい
る。前記炉体1の底部中央には注湯口4aを有す
る円筒状の注湯ノズル4が設けられ、この注湯ノ
ズル4は鉄等の磁性材で形成されている。前記注
湯口4aの真上には下端部で注湯口4aの開閉作
用を行う上下方向の棒状ストツパー(開閉弁)5
が昇降可能に設けられ、このストツパー5を上昇
させると注湯口4aが開いて炉体1内の溶湯6を
注出するようになつている。前記継鉄3の下端部
は先端面が注湯ノズル4の下端部に近接するよう
に折り曲げ形成され、前記コイル2の励磁に伴う
磁束7が点線で示すように継鉄3の下端折曲部と
注湯ノズル4を通つて流れるようにしてある。ま
た前記磁束7が継鉄3の下端部から耐火材を通つ
て溶湯6に短絡貫流しないようにするために炉体
1の下部内面を漏斗状に斜めに形成して耐火材の
厚さを増すようにしてある。前記炉体1は有底円
筒状のフレーム8に上面外縁部を耐火材9で封止
して収納される。
Figures 1 and 2 show an embodiment of this invention, in which an induction heating coil 2 is wound around the outer periphery of a crucible-shaped furnace body 1 made of a refractory material. It is supported by yoke 3. A cylindrical pouring nozzle 4 having a pouring port 4a is provided at the center of the bottom of the furnace body 1, and this pouring nozzle 4 is made of a magnetic material such as iron. Directly above the pouring spout 4a is a vertical rod-shaped stopper (opening/closing valve) 5 whose lower end opens and closes the pouring spout 4a.
is provided to be movable up and down, and when the stopper 5 is raised, the pouring port 4a opens and the molten metal 6 in the furnace body 1 is poured out. The lower end of the yoke 3 is bent so that the tip surface is close to the lower end of the pouring nozzle 4, and the magnetic flux 7 accompanying the excitation of the coil 2 is directed to the lower end bent portion of the yoke 3 as shown by the dotted line. The molten metal is made to flow through the pouring nozzle 4. In addition, in order to prevent the magnetic flux 7 from short-circuiting and flowing from the lower end of the yoke 3 through the refractory material to the molten metal 6, the inner surface of the lower part of the furnace body 1 is formed obliquely into a funnel shape to increase the thickness of the refractory material. It's like this. The furnace body 1 is housed in a bottomed cylindrical frame 8 with its upper outer edge sealed with a refractory material 9.
前記実施例によればコイル2の励磁に伴う磁束
7が継鉄3、注湯ノズル4および溶湯6を通つて
環流し、この磁束7の誘導作用により発生した渦
電流熱で注湯ノズル4を加熱して高温に保つので
注湯時に注湯口4aで溶湯6が固化してつまるこ
とを防止することができる。 According to the embodiment, the magnetic flux 7 accompanying the excitation of the coil 2 circulates through the yoke 3, the pouring nozzle 4, and the molten metal 6, and the eddy current heat generated by the induction action of this magnetic flux 7 causes the pouring nozzle 4 to flow. Since it is heated and maintained at a high temperature, it is possible to prevent the molten metal 6 from solidifying and clogging the pouring port 4a during pouring.
他の実施例を示す第3図においては、注湯ノズ
ル34がアルミナ等の耐熱材からなる筒状体34
aの上部を除く外周部を鉄等の磁性材からなる筒
状体34bで包囲して形成され、磁束7が外周部
の筒状体34bを流れて注湯ノズル34全体を加
熱するようになつている。この実施例によれば溶
湯6との接触部にアルミナ等の耐熱材を使用した
ので溶湯6による注湯ノズル34の減耗を抑制す
ることができる。 In FIG. 3 showing another embodiment, the pouring nozzle 34 is a cylindrical body 34 made of a heat-resistant material such as alumina.
It is formed by surrounding the outer periphery except the upper part of a with a cylindrical body 34b made of a magnetic material such as iron, and the magnetic flux 7 flows through the cylindrical body 34b on the outer periphery and heats the entire pouring nozzle 34. ing. According to this embodiment, since a heat-resistant material such as alumina is used for the contact portion with the molten metal 6, it is possible to suppress the wear and tear of the pouring nozzle 34 due to the molten metal 6.
この考案によればるつぼ形誘導炉において、炉
体底部の筒状注湯ノズルを磁性材で形するととも
に、上下方向の継鉄の下端部を折り曲げ形成して
先端面を前記注湯ノズルの下端部に接近させるこ
とにより誘導加熱コイルの励磁に伴う磁束を注湯
ノズルに通して流れるようにしたので、注湯ノズ
ルを高温に誘導加熱して注湯口での溶湯の固化を
防止することができるという効果が得られる。
According to this invention, in a crucible-type induction furnace, a cylindrical pouring nozzle at the bottom of the furnace body is made of a magnetic material, and the lower end of the vertical yoke is bent to form a tip end surface at the lower end of the pouring nozzle. The magnetic flux generated by the excitation of the induction heating coil is caused to flow through the pouring nozzle by placing the coil close to the pouring nozzle, so the pouring nozzle can be inductively heated to a high temperature and the molten metal can be prevented from solidifying at the pouring spout. This effect can be obtained.
第1図はこの考案の実施例の縦断面図、第2図
は第1図の−線に沿う横断面図、第3図はこ
の考案の他の実施例の縦断面図である。
1……炉体、2……コイル、3……継鉄、4,
34……注湯ノズル、4a……注湯口、5……開
閉弁。
FIG. 1 is a longitudinal sectional view of an embodiment of this invention, FIG. 2 is a transverse sectional view taken along the - line of FIG. 1, and FIG. 3 is a longitudinal sectional view of another embodiment of this invention. 1...furnace body, 2...coil, 3...yoke, 4,
34...Pouring nozzle, 4a...Pouring port, 5...Opening/closing valve.
Claims (1)
周に巻装した誘導加熱コイルと、このコイルを外
側から支持する複数の上下方向継鉄と、前記炉体
の底部に設けた注湯口と、この注湯口の真上に昇
降可能に設けられ注湯口の開閉作用を行う開閉弁
とを備えてなる誘導炉において、前記注湯口を有
する筒状の注湯ノズルを磁性材で形成するととも
に、前記継鉄の下端部を折曲げ形成して先端面を
注湯ノズルの下端部に接近させたことを特徴とす
るるつぼ形誘導炉。 A crucible-shaped furnace body made of a refractory material, an induction heating coil wrapped around the outer periphery of the furnace body, a plurality of vertical yokes that support the coil from the outside, and a pouring port provided at the bottom of the furnace body. In the induction furnace, the cylindrical pouring nozzle having the pouring spout is made of a magnetic material, and the induction furnace is equipped with an on-off valve that is movable up and down directly above the pouring spout and opens and closes the pouring spout. A crucible-shaped induction furnace characterized in that the lower end of the yoke is bent so that the tip surface approaches the lower end of the pouring nozzle.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4007484U JPS60152290U (en) | 1984-03-21 | 1984-03-21 | Crucible induction furnace |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4007484U JPS60152290U (en) | 1984-03-21 | 1984-03-21 | Crucible induction furnace |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS60152290U JPS60152290U (en) | 1985-10-09 |
JPS6321915Y2 true JPS6321915Y2 (en) | 1988-06-16 |
Family
ID=30548623
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4007484U Granted JPS60152290U (en) | 1984-03-21 | 1984-03-21 | Crucible induction furnace |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60152290U (en) |
-
1984
- 1984-03-21 JP JP4007484U patent/JPS60152290U/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS60152290U (en) | 1985-10-09 |
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