JPS5936213B2 - Electrode for detecting liquid level of molten metal - Google Patents
Electrode for detecting liquid level of molten metalInfo
- Publication number
- JPS5936213B2 JPS5936213B2 JP9322876A JP9322876A JPS5936213B2 JP S5936213 B2 JPS5936213 B2 JP S5936213B2 JP 9322876 A JP9322876 A JP 9322876A JP 9322876 A JP9322876 A JP 9322876A JP S5936213 B2 JPS5936213 B2 JP S5936213B2
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- electrode
- liquid level
- ceramics
- detecting
- 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
- 229910052751 metal Inorganic materials 0.000 title claims description 40
- 239000002184 metal Substances 0.000 title claims description 40
- 239000007788 liquid Substances 0.000 title claims description 15
- 239000000919 ceramic Substances 0.000 claims description 23
- 238000005245 sintering Methods 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 150000004767 nitrides Chemical class 0.000 claims 1
- 230000000737 periodic effect Effects 0.000 claims 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 10
- 239000010439 graphite Substances 0.000 description 10
- 229910002804 graphite Inorganic materials 0.000 description 10
- 229910052582 BN Inorganic materials 0.000 description 9
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- QYEXBYZXHDUPRC-UHFFFAOYSA-N B#[Ti]#B Chemical compound B#[Ti]#B QYEXBYZXHDUPRC-UHFFFAOYSA-N 0.000 description 6
- 229910033181 TiB2 Inorganic materials 0.000 description 6
- 230000035939 shock Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000004512 die casting Methods 0.000 description 5
- 230000003647 oxidation Effects 0.000 description 5
- 238000007254 oxidation reaction Methods 0.000 description 5
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- 239000002131 composite material Substances 0.000 description 4
- 238000001514 detection method Methods 0.000 description 4
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229910001018 Cast iron Inorganic materials 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 2
- 229910007948 ZrB2 Inorganic materials 0.000 description 2
- 229910026551 ZrC Inorganic materials 0.000 description 2
- OTCHGXYCWNXDOA-UHFFFAOYSA-N [C].[Zr] Chemical compound [C].[Zr] OTCHGXYCWNXDOA-UHFFFAOYSA-N 0.000 description 2
- VWZIXVXBCBBRGP-UHFFFAOYSA-N boron;zirconium Chemical compound B#[Zr]#B VWZIXVXBCBBRGP-UHFFFAOYSA-N 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000007731 hot pressing Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- MZLGASXMSKOWSE-UHFFFAOYSA-N tantalum nitride Chemical compound [Ta]#N MZLGASXMSKOWSE-UHFFFAOYSA-N 0.000 description 2
- 229910001141 Ductile iron Inorganic materials 0.000 description 1
- 229910000997 High-speed steel Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- -1 nitride carbides Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Continuous Casting (AREA)
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Description
【発明の詳細な説明】
本発明は、溶融金属（以下溶湯という）の液面位置を検
出して、溶湯汲出し操作や溶湯の供給のための信号を発
信するために用いる溶融金属の液面検出用電極に関する
。DETAILED DESCRIPTION OF THE INVENTION The present invention detects the liquid level position of molten metal (hereinafter referred to as molten metal) and detects the liquid level of molten metal, which is used for transmitting signals for pumping out the molten metal and supplying the molten metal. Regarding detection electrodes.
従来、ダイカスト機の射出装置に溶湯を供給する自動給
湯装置には溶湯の液面を検出して溶湯の液面高さが変動
しても追従できるような電極棒を設けるようにしている
。Conventionally, an automatic water supply device that supplies molten metal to an injection device of a die-casting machine is equipped with an electrode rod that can detect the liquid level of the molten metal and follow changes in the height of the molten metal.
まをζ 溶解炉や保温炉の溶湯は、手汲みや自動的な機
構等によつて汲み出し、使用すると溶湯の液面が低下す
るので、液面を電極棒により検知して、所定液面以下に
なるとブザーを鳴るようにしたり、自動的に溶湯を補給
するようにしたものもある。The molten metal in the melting furnace or insulating furnace is pumped out manually or by an automatic mechanism, and as it is used, the level of the molten metal decreases, so the liquid level is detected with an electrode rod and kept below the specified level. Some are designed to sound a buzzer or automatically replenish molten metal when the temperature is reached.
例えば、第１図に示すような、アルミニウム系合金や鋳
鉄のダイカストで用いられている自動給導装置において
、アーム２に取り付けられたラドル３で炉４内の溶湯１
は定量汲み出され、注湯カップ５に注湯さ札 ダイカス
トされるようになつている。For example, in an automatic feeding device used in die-casting aluminum alloys and cast iron, as shown in FIG.
is pumped out in a fixed amount and die-cast into the pouring cup 5.
第２図は、第１図に示した自動給湯装置の電気回路の一
部を示す図面で、アーム２に取り付けられた電極棒６と
図示してない電極棒Ｔが溶湯１の液面に接触すると、リ
レー１０が働らきラドル３が停止する。一方リレー１０
の働らきと同時に図示してないタイマーやリミットスイ
ッチ等の電気系統により、ラドル３の傾斜、上昇、注湯
等の信号が与えられるようになつている。ここ双８は商
用電源、９は、降圧トランスである。また、第３図は、
炉４の溶湯１の液面が低下し、電極棒１１の先端から離
れるとリレー１２が働らき、このリレー接点１２ａに直
列に介挿したブザー１３が鳴り、溶湯が不足したことを
知らせるようにした構成を示す概略構成図である。とこ
ろでこのような、電極棒に要求される性質は、導電性で
あること、溶湯に侵食されないこと、溶湯を汚染したり
、侵食されて破損されたりしないこと、溶湯にぬれにく
いこと、寿命が長いこと等である。FIG. 2 is a drawing showing a part of the electric circuit of the automatic water heater shown in FIG. Then, the relay 10 is activated and the ladle 3 is stopped. On the other hand relay 10
At the same time, signals for tilting, raising, pouring, etc. of the ladle 3 are given by an electric system such as a timer and a limit switch (not shown). Here, double 8 is a commercial power supply, and 9 is a step-down transformer. Also, Figure 3 shows
When the liquid level of the molten metal 1 in the furnace 4 decreases and separates from the tip of the electrode rod 11, the relay 12 is activated, and the buzzer 13 inserted in series with the relay contact 12a sounds to notify that the molten metal is insufficient. FIG. 2 is a schematic configuration diagram showing the configuration. By the way, these properties required for electrode rods are conductivity, not being corroded by the molten metal, not contaminating the molten metal or being damaged by erosion, not being easily wetted by the molten metal, and having a long life. This is the case.
従来この種の溶湯の液面検出電極には、黒鉛を主成分と
する黒鉛電極が用いられていたが、この黒鉛電極には種
々の問題があり、電極の改良が望まれていた。Conventionally, a graphite electrode containing graphite as a main component has been used as a liquid level detection electrode for this type of molten metal, but this graphite electrode has various problems, and improvements in the electrode have been desired.
例えば、溶湯がアルミニウム系合金である場合、黒鉛は
、アルミニウムとぬれにくいし、電気抵抗も第１表に示
す如く８００〜１７００μΩ儂と導電性であり、更に耐
熱衝撃性にもすぐれている力ゝ約４００℃以上の大気中
で酸化されるので、電極棒は除々に細く、短くなり、場
合によつては、欠損する。For example, when the molten metal is an aluminum alloy, graphite is difficult to wet with aluminum, has an electrical resistance of 800 to 1700 μΩ as shown in Table 1, and is conductive. Furthermore, it has excellent thermal shock resistance. Since the electrode rod is oxidized in the atmosphere at a temperature of about 400° C. or higher, it gradually becomes thinner and shorter, and in some cases becomes damaged.
そのため、長期間の連続使用に耐えず、交換回数が多く
、生産性の低下を招くばかりでなく、自動化の障害とも
なつている。また、溶湯が、鋳鉄の場合には、アルミニ
ウム系合金の溶湯に比して温度が高いためさらに酸化が
激しくなることと、溶湯に電極から黒鉛が吸炭されるの
でアルミニウム溶湯の場合よりさらに激しく消耗され、
電極の交換頻度が多くなつている。Therefore, they cannot withstand continuous use over long periods of time and have to be replaced frequently, which not only causes a decrease in productivity but also becomes an obstacle to automation. In addition, when the molten metal is cast iron, the temperature is higher than that of molten aluminum alloys, so oxidation becomes more intense, and graphite is absorbed into the molten metal from the electrode, so it is more intense than in the case of molten aluminum. consumed,
Electrodes are being replaced more frequently.
本発明は以上のような欠点に鑑み成されたもので、導電
性があり、溶湯に侵食されにくく、ぬれにくく、耐酸化
性にすぐれた溶融金属の液面検出用電極を提供すること
を目的とするものである。すでに述べたように、電極に
要求される性質には、多くの厳しい条件があるが、溶湯
に侵食されない材料として、多くのセラミツクスがある
。セラミツクスには、第１表に示す如くＡｔ２Ｏ３（ア
ルミナ）やＳｉ３Ｎ４（窒化珪素）のように溶湯には侵
食されないが絶縁性のものと、ＴｉＢ２（ニホウ化チタ
ン）、ＴｉＣ（炭化チタン）、ＴＩＮ（窒化チタン）、
ＺｒＢ２（ニホウ化ジルコニウム）、ＺｒＣ（炭化ジル
コニウム）、ＴａＮ（窒化タンタル）等のＢ族、ＶＢ族
のホウ化、窒化炭化物のように導電性のものとがある。
これらの導電性セラミツクスは、溶湯に侵食されにくく
、ぬれにくく、導電性があり、黒鉛に比べ耐酸化性にす
ぐれているという特性を備えている。本発明は、これら
の特性に着目したもので、これらの導電性セラミツクス
の焼結体を電極棒として用いることを特徴とするもので
ある。この場合、これらの導電性セラミツクスの２種以
上の混合物より、絶縁性セラミツクスを導電性を失なわ
ない範囲で粒成長抑制や物性の改良を目的として添加し
たり、不純物として含んだ焼結体をも含む。The present invention was made in view of the above drawbacks, and an object of the present invention is to provide an electrode for detecting the liquid level of molten metal that is conductive, difficult to be corroded by molten metal, difficult to get wet, and has excellent oxidation resistance. That is. As already mentioned, there are many strict conditions regarding the properties required for electrodes, but there are many ceramics that are not corroded by molten metal. As shown in Table 1, ceramics include those that are insulating but not corroded by molten metal, such as At2O3 (alumina) and Si3N4 (silicon nitride), TiB2 (titanium diboride), TiC (titanium carbide), and TIN ( titanium nitride),
There are conductive materials such as B-group and VB-group borides and nitride carbides such as ZrB2 (zirconium diboride), ZrC (zirconium carbide), and TaN (tantalum nitride).
These conductive ceramics have the characteristics of being difficult to be corroded by molten metal, hard to get wet, conductive, and have superior oxidation resistance compared to graphite. The present invention focuses on these characteristics, and is characterized by using a sintered body of these conductive ceramics as an electrode rod. In this case, from a mixture of two or more of these conductive ceramics, insulating ceramics may be added for the purpose of suppressing grain growth or improving physical properties without losing conductivity, or sintered bodies containing impurities may be added. Also included.
上述の導電性セラミツクスを溶湯の液面検出用電極とし
て用いる場合、雰囲気の温度が溶湯温度に近く、溶湯と
接触しても、冷却と加熱の熱サイクルをあまり受けない
ような場合には、十分その特性の効果を発揮するが、第
１図、第２図により説明した自動給湯装置の液面検出用
電極のように、大気中から溶湯中にという冷却と加熱の
熱サイクルを受けるような条件下では、後述の実施例に
示す如く、熱衝撃により破損するのであまり好ましくな
い。When using the above-mentioned conductive ceramics as an electrode for detecting the liquid level of molten metal, if the temperature of the atmosphere is close to the molten metal temperature and it does not undergo much thermal cycle of cooling and heating even if it comes into contact with the molten metal, it is sufficient. Although the effect of this characteristic is exhibited, it is not necessary to use the condition where it is subjected to a thermal cycle of cooling and heating from the atmosphere to the molten metal, as in the case of the liquid level detection electrode of an automatic hot water supply device explained in Fig. 1 and Fig. 2. As shown in the examples below, this is not very preferable because it will be damaged by thermal shock.
このような、耐熱衝撃性が要求される場合に１九前述の
導電性セラミツクスとＢＮ（窒化ホウ素）との複合セラ
ミツクスがすぐれている。In cases where such thermal shock resistance is required, composite ceramics of the above-mentioned conductive ceramics and BN (boron nitride) are excellent.
ＢＮは、ＴｉＢ２やＴｉＣ等のセラミツクスに添加混合
すると、０．５％程度の少量でも、ＴｉＢ２やＴＩＣの
耐熱衝撃住が改善されることが知られているが、鋳鉄の
ように溶解温度が１５００℃にもなる溶湯中に大気中か
ら浸漬されるというような厳しい条件下では、導電性を
失なわない範囲で最大限添加した方が好ましい。It is known that when BN is added to ceramics such as TiB2 or TiC, even a small amount of about 0.5% can improve the thermal shock resistance of TiB2 or TIC. Under severe conditions such as being immersed from the atmosphere into molten metal at temperatures as high as 0.degree. C., it is preferable to add as much as possible without losing conductivity.
この種のセラミツクスとしては例えば、アルミニウムの
真空蒸着に用いられる直接通電加熱用のルツボやポート
材として開発された導電性セラミツクスで、ＢＮコンポ
ジツトＥＣ（電気化工業（株）罠 商品名）やＢＮ＋Ｔ
ｌＢ２＋Ａｍ等があり、溶湯に侵食されず、ぬれにくく
、導電性があり、熱衝撃に強く、耐酸化性にもすぐれて
いるので、溶湯の液面検出用電極として用いた場合、そ
の効果は非常に大なるものとなる。Examples of this type of ceramics include conductive ceramics developed as crucibles and port materials for direct current heating used in vacuum evaporation of aluminum, such as BN composite EC (trade name of Denka Kogyo Co., Ltd. Trap) and BN+T.
1B2+Am, etc., and is not corroded by molten metal, is difficult to wet, has conductivity, is resistant to thermal shock, and has excellent oxidation resistance, so it is extremely effective when used as an electrode for detecting the level of molten metal. becomes great.
また、ＴｉＢ２やＴｉＣ等の単味の焼結体は、高硬度で
あるので、機械加工性が悪く、ダイヤモンド砥石で研削
しなければならないのに対し、導電性を失なわないよう
に、ＢＮを添加するとＢＮは硬度が低いのでこの種のセ
ラミツクスは機械加工が容易であり、穴あけタツプ、旋
削等が、高速度鋼バイトや超硬バイトで容易に行え各種
の金属部品との取り付けが有利である。In addition, single sintered bodies such as TiB2 and TiC have high hardness and therefore have poor machinability and must be ground with a diamond grindstone. When added, BN has low hardness, so this type of ceramic is easy to machine, and drilling taps, turning, etc. can be easily performed with a high-speed steel bit or carbide bit, and it is advantageous for attachment to various metal parts. .
なお、これまで、説明してきた、溶湯の液面検出用電極
としての導電性セラミツクスの製法としては、ホツトプ
レス法、反応ホツトプレス法、熱間静水圧法、通電焼結
法等の各種の製造法があり、特に制限はされない。As for the manufacturing methods of conductive ceramics used as electrodes for detecting the liquid level of molten metal, which have been explained so far, there are various manufacturing methods such as hot pressing method, reactive hot pressing method, hot isostatic pressing method, and current sintering method. Yes, there are no particular restrictions.
以上、説明した如く、本発明は各種の溶湯液面検出用電
極として用いられている黒鉛の代わり（Ｃ．導電性があ
り、黒鉛に比べ耐酸化性にすぐれた各種のセラミツクス
を用いることを提案するものであり使用方法あるいは用
途により、耐熱衝撃住にすぐれたＢＮとの複合セラミツ
クスを用いることを提案するもので、以下、実施例によ
り、本発明が工業的に有効であることを説明する。As explained above, the present invention proposes the use of various ceramics, which are conductive and have superior oxidation resistance compared to graphite, in place of graphite, which is used as an electrode for detecting the level of various molten metals. Therefore, it is proposed to use composite ceramics with BN, which has excellent thermal shock resistance, depending on the method of use or application.The industrial effectiveness of the present invention will be explained below with reference to Examples.
第１図および第２図に示した自動給湯装置の液面検出用
電極として、従来使われていた黒鉛およびＴｌＢ２単味
のホツトプレス成形したものと本発明によるＴｉＢ２と
ＢＮを反応ホツトプレス法にて成形した電極ＢＮコンポ
ジツトＥＣ（電気化学工業（株）商品名）を用い、ダイ
カスト用アルミニウム合金１０種（ＡＤＣＩＯ）を６６
０℃〜６８０℃に溶解してダイカストした結果の比較を
第２表に示す。As a liquid level detection electrode for the automatic water heater shown in FIGS. 1 and 2, hot press molding of conventionally used graphite and TlB2 monomers and TiB2 and BN according to the present invention were molded by a reaction hot press method. Using the electrode BN composite EC (trade name of Denki Kagaku Kogyo Co., Ltd.), 10 kinds of aluminum alloys for die casting (ADCIO) were used.
Table 2 shows a comparison of the results of melting and die casting at 0°C to 680°C.
第２表に示す如く、従来用いられていた黒鉛電極に比べ
、本発明の電極は大きく寿命の伸長を図ることができ高
温下で電極を交換するという危険作業を減少することが
でき、生産性も向上した。また、第３表は、上記各電極
について球状黒鉛鋳鉄（溶解温度１４５０℃〜１５００
℃）をダイカストする時に用いた結果の比較である。As shown in Table 2, compared to conventionally used graphite electrodes, the electrode of the present invention has a significantly longer lifespan, reduces the dangerous work of replacing electrodes at high temperatures, and improves productivity. has also improved. In addition, Table 3 shows the spheroidal graphite cast iron (melting temperature: 1450°C to 1500°C) for each of the above electrodes.
This is a comparison of the results used when die-casting (℃).
以上、電極棒について説明を加えてきたが、例えば自動
給湯装置のように、第１図のラドル３自体を本発明の電
極材料で作り、ラドル３自体を１つの電極とし、場合に
よつては、Ｊ炉４を他方の電極とすれば、電極棒は不用
となるので、このような使用方法もある。The electrode rod has been explained above, but in some cases, for example in an automatic water heater, the ladle 3 itself in FIG. If the J furnace 4 is used as the other electrode, the electrode rod becomes unnecessary, so there is also this method of use.
第１図は、自動給湯装置の概要を示す図面、第２図は、
第１図の自動給湯装置の電気回路の一部を示す図面、第
３図は、炉中の溶湯液面を検出する構成の概略図である
。Figure 1 is a diagram showing an outline of an automatic hot water supply system, and Figure 2 is a diagram showing an outline of an automatic water heater.
FIG. 1 is a diagram showing a part of the electric circuit of the automatic water heater, and FIG. 3 is a schematic diagram of a configuration for detecting the level of molten metal in the furnace.
Claims (1)
の群の物質の導電性セラミックスの１種または２種以上
のセラミックスを焼結した導電性セラミックスよりなる
ことを特徴とする溶融金属の液面検出用電極。 ２ 特許請求の範囲第１項記載の導電性セラミックスに
ＢＮを添加混合し、焼結した導電性セラミックスよりな
ることを特徴とする溶融金属の液面検出用電極。 ３ 特許請求の範囲第１項あるいは第２項記載の導電性
セラミックスに、Ａｌ＿２Ｏ＿３、ＡｌＮ、Ｓｉ＿３Ｎ
＿４、Ｙ＿２Ｏ＿３等のセラミックスを不純物として含
むかあるいは添加混合し、焼結した導電性セラミックス
よりなることを特徴とする溶融金属の液面検出用電極。[Scope of Claims] 1. Consisting of a conductive ceramic obtained by sintering one or more types of conductive ceramics made of materials from the boride, nitride, and carbide groups of Group IVB and Group VB of the periodic table. An electrode for detecting the liquid level of molten metal. 2. An electrode for detecting the liquid level of molten metal, characterized in that it is made of a conductive ceramic obtained by adding and mixing BN to the conductive ceramic according to claim 1 and sintering the mixture. 3 Al_2O_3, AlN, Si_3N in the conductive ceramic according to claim 1 or 2.
An electrode for detecting the liquid level of molten metal, characterized in that it is made of a sintered conductive ceramic containing ceramics such as _4, Y_2O_3, etc. as impurities or added thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9322876A JPS5936213B2 (en) | 1976-08-06 | 1976-08-06 | Electrode for detecting liquid level of molten metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9322876A JPS5936213B2 (en) | 1976-08-06 | 1976-08-06 | Electrode for detecting liquid level of molten metal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5319135A JPS5319135A (en) | 1978-02-22 |
| JPS5936213B2 true JPS5936213B2 (en) | 1984-09-03 |
Family
ID=14076673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9322876A Expired JPS5936213B2 (en) | 1976-08-06 | 1976-08-06 | Electrode for detecting liquid level of molten metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5936213B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE414075B (en) * | 1978-10-10 | 1980-07-07 | Sallander Hakan | PROCEDURE FOR SOUND AND VIBRATION DIMENSION OF MACHINES WITH TRANSIEBTA POWER LOADS OF THE TYPE THAT APPEAR IN CLIPPING PRESSURES AND DEVICE FOR IMPLEMENTATION OF THE PROCEDURE |
| JPS5757219A (en) * | 1980-09-24 | 1982-04-06 | Toshiba Mach Co Ltd | Liquid level meter for molten metal |
| JPH0424417Y2 (en) * | 1986-01-10 | 1992-06-09 | ||
| JPS6380952A (en) * | 1986-09-25 | 1988-04-11 | Hitachi Metals Ltd | Molten surface detecting rod |
| JPS6433618U (en) * | 1988-07-27 | 1989-03-02 |
-
1976
- 1976-08-06 JP JP9322876A patent/JPS5936213B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5319135A (en) | 1978-02-22 |
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