JPH0679444A - Production of energized heating nozzle for casting strip - Google Patents
Production of energized heating nozzle for casting stripInfo
- Publication number
- JPH0679444A JPH0679444A JP4238536A JP23853692A JPH0679444A JP H0679444 A JPH0679444 A JP H0679444A JP 4238536 A JP4238536 A JP 4238536A JP 23853692 A JP23853692 A JP 23853692A JP H0679444 A JPH0679444 A JP H0679444A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- view
- sectional
- casting
- manufacturing
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000005266 casting Methods 0.000 title claims description 14
- 238000010438 heat treatment Methods 0.000 title description 6
- 239000002184 metal Substances 0.000 claims abstract description 25
- 238000000465 moulding Methods 0.000 claims abstract description 5
- 239000011819 refractory material Substances 0.000 claims description 9
- 238000005485 electric heating Methods 0.000 claims description 5
- 238000010304 firing Methods 0.000 claims description 2
- 230000002706 hydrostatic effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 8
- 238000007598 dipping method Methods 0.000 abstract description 3
- 230000005499 meniscus Effects 0.000 abstract description 2
- 239000004020 conductor Substances 0.000 abstract 1
- 238000009749 continuous casting Methods 0.000 abstract 1
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- 238000007654 immersion Methods 0.000 description 9
- 230000003014 reinforcing effect Effects 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000462 isostatic pressing Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Press-Shaping Or Shaping Using Conveyers (AREA)
Abstract
(57)【要約】
【目的】 本発明は連続鋳造法に関し、特に浸漬ノズル
に通電をおこなうことによってメニスカス部位で発生す
る。地金付着を防止できるノズルの製造方法を提供す
る。
【構成】 導電性材料より成る注入ノズルの側面に成形
時に通電リード部を一体成形した後、ノズルの両短片側
に縦方向にノズル頭部からノズル下部まで中空スリット
の切り込みをいれることを特徴とする。
(57) [Summary] [Object] The present invention relates to a continuous casting method, and particularly, it is generated at a meniscus portion by energizing a dipping nozzle. Provided is a method for manufacturing a nozzle capable of preventing metal adhesion. [Characteristics] A hollow slit is formed from the nozzle head to the lower part of the nozzle in the vertical direction on both short sides of the nozzle after integrally molding the current-carrying lead portion on the side surface of the injection nozzle made of a conductive material. To do.
Description
【０００１】[0001]
【産業上の利用分野】本発明は薄金属板を鋳造するのに
用いる薄板鋳造用ノズルの製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a thin plate casting nozzle used for casting a thin metal plate.
【０００２】[0002]
【従来の技術】薄板鋳造用ノズル（以下浸漬ノズルと言
う）は、薄板形状の鋳造モールド内に浸漬して溶融金属
を注入するために使用することから、ノズルの断面形状
は偏平で肉厚が薄い。浸漬ノズルは、鋳造開始時では溶
融金属の温度よりもかなり低く、鋳造中では大気等への
放熱により冷却される。浸漬ノズルの温度が低いと、浸
漬ノズルを通過する溶融金属の温度が低下する。このた
め、溶融金属が浸漬ノズル内で凝固して閉塞するおそれ
がある。2. Description of the Related Art A thin plate casting nozzle (hereinafter referred to as a dipping nozzle) is used for immersing a molten metal in a thin plate-shaped casting mold, so that the nozzle has a flat cross section and a thin wall. thin. The immersion nozzle is considerably lower than the temperature of the molten metal at the start of casting, and is cooled by radiating heat to the atmosphere during casting. When the temperature of the immersion nozzle is low, the temperature of the molten metal passing through the immersion nozzle decreases. Therefore, the molten metal may be solidified and clogged in the immersion nozzle.
【０００３】従って、鋳造開始時あるいは鋳造中に浸漬
ノズルを加熱する必要がある。浸漬ノズルを加熱する方
法として、例えば、特開平１−２８９５４４号公報で
は、ノズルに形成した抵抗発熱層に給電ブスバーを介し
て電極を短片に加圧押しつけて通電することが記載され
ている。このノズルの製造方法は、特開平３−２０７５
９９号公報に記載されているように、成形用中芯金をゴ
ム製の外型内に収納し、導電性耐火材料を充填後、静水
圧プレスをかけ形成した後、還元焼成し、所定形状に加
工する方法がある。Therefore, it is necessary to heat the immersion nozzle at the start of casting or during casting. As a method of heating the immersion nozzle, for example, Japanese Patent Application Laid-Open No. 1-289544 describes that the resistance heating layer formed on the nozzle is pressed against the short piece of the electrode via the power supply bus bar to conduct electricity. The manufacturing method of this nozzle is described in JP-A-3-2075.
As described in Japanese Patent Publication No. 99, the core metal for molding is housed in an outer mold made of rubber, is filled with a conductive refractory material, is hydrostatically pressed to form, and is then reduced and fired to have a predetermined shape. There is a method of processing.
【０００４】[0004]
【発明が解決しようとする課題】従来の製造法によるノ
ズルは、偏平、薄肉、中空であるため、ノズル先端にブ
スバーを介して電極を加圧接続して、通電加熱すると電
極とノズル間の接触不良によって、スパークが発生し、
ノズルを損傷させる懸念があった。また、溶融金属注入
時にはノズル内孔に溶融金属が流れてノズルに圧力がか
かるが、浸漬ノズルは前述の通り偏平かつ薄肉であるた
め、構造体としての強度が一般の鋳造ノズルに比べて小
さく、溶融金属圧に起因するノズルの割れが発生するこ
ともある。Since the nozzle manufactured by the conventional manufacturing method is flat, thin, and hollow, when the electrode is pressure-connected to the tip of the nozzle via the bus bar and heated by energization, the contact between the electrode and the nozzle occurs. A defect causes sparks,
There was a risk of damaging the nozzle. Further, when molten metal is injected, molten metal flows into the nozzle inner hole and pressure is applied to the nozzle, but since the immersion nozzle is flat and thin as described above, the strength as a structure is smaller than that of a general casting nozzle, The nozzle may be cracked due to the molten metal pressure.
【０００５】本発明の目的は、通電加熱のための給電接
続を薄肉の浸漬ノズルと直接加圧接続させることなく、
安定通電加熱を可能とし、かつ、溶融金属圧に耐え得る
ノズルの製造方法を提供するものである。An object of the present invention is to directly connect a power supply connection for electric heating with a thin-walled immersion nozzle by pressure connection.
It is intended to provide a method for manufacturing a nozzle which enables stable electric heating and can withstand a molten metal pressure.
【０００６】[0006]
【課題を解決するための手段】縦方向に切り込みを入れ
た成形用中芯金をゴム製の外型内に収納し、導電性耐火
材料を充填後、静水圧プレスをかけ成形した後、還元焼
成し、ノズルを製造する方法において、前記還元焼成し
たノズルの両短片側に縦方向にノズル頭部から溶融金属
に浸漬されないノズル下部まで、中空スリットの切り込
みをいれることを特徴とする。[Means for Solving the Problems] A molding core metal having a vertical cut is housed in an outer mold made of rubber, filled with a conductive refractory material, molded by hydrostatic pressing, and then reduced. In the method of producing a nozzle by firing, hollow slits are formed on both short sides of the reduction-fired nozzle in the vertical direction from the nozzle head to the lower portion of the nozzle not immersed in the molten metal.
【０００７】[0007]
【作用】縦方向に切り込みを入れた成形用中芯金を使用
することによって、切り込み空間に導電性耐火材料が充
填され、長片側胴部壁と一体化し、補強が図られる。ま
た、ノズル下端部から両短片に沿った端部を通電加熱の
ための給電リード部として使用し、頭部に電源を接続す
ることによって通電することによって、浸漬ノズル先端
を安定加熱出来る。By using a molding cored bar having a notch in the longitudinal direction, a conductive refractory material is filled in the notch space and is integrated with the long piece side body wall for reinforcement. Further, by using the ends from the lower end of the nozzle along both short pieces as a power supply lead for electric heating, and connecting the power source to the head to supply electric power, the tip of the immersion nozzle can be stably heated.
【０００８】[0008]
【実施例】以下に本発明の製造方法の一実施例を図面に
より詳細に説明する。図１から図５は製造法の工程順序
を示す図である。図１は中芯金２の斜視図である。図２
はゴム型５と中芯金２の空間に導電性耐火材料４を充填
した時のゴム型内の縦断面図である。図３は上蓋をセッ
トした後の縦断面図である。図４（ａ）は成形体の縦断
面図であり、図４（ｂ）はそのＡ位置での横断面図であ
る。図５（ａ）は製造後のノズル縦断面図であり、図５
（ｂ）は図５（ａ）のＢ位置での横断面図を示し、図５
（ｃ）は図５（ａ）のＣ位置での横断面図を示す。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the manufacturing method of the present invention will be described in detail below with reference to the drawings. 1 to 5 are views showing a process sequence of the manufacturing method. FIG. 1 is a perspective view of the core metal 2. Figure 2
FIG. 4 is a vertical cross-sectional view of the inside of the rubber mold when the electrically conductive refractory material 4 is filled in the space between the rubber mold 5 and the core metal 2. FIG. 3 is a vertical sectional view after setting the upper lid. FIG. 4A is a vertical sectional view of the molded body, and FIG. 4B is a horizontal sectional view at the position A thereof. FIG. 5A is a vertical cross-sectional view of the nozzle after manufacturing.
5B is a cross-sectional view taken along the line B in FIG.
FIG. 5C shows a cross-sectional view at the position C in FIG.
【０００９】図６は本発明で製造したノズルの一例を示
す斜視図である。図１に示すように、中芯金２の中央に
切り込み部３を設けている。図２に示すように、下蓋６
の上に中芯金２を倒立させてセットし、外型であるゴム
型５をかぶせた後、Ａl2O3−Ｃ（Ｃ＝１０〜３０％）等
の導電性耐火材料４を型内に充填する。このとき、導電
性耐火材料４は切り込み部３にも流れ込み充填される。
そこで、ノズル本体と一体化した補強部１を形成する。FIG. 6 is a perspective view showing an example of the nozzle manufactured by the present invention. As shown in FIG. 1, a notch 3 is provided at the center of the core metal 2. As shown in FIG. 2, the lower lid 6
Set the cored bar 2 upside down on the top, cover it with the rubber mold 5 which is the outer mold, and then put the conductive refractory material 4 such as Al 2 O 3 -C (C = 10 to 30%) in the mold. To fill. At this time, the conductive refractory material 4 also flows into and fills the notch 3.
Therefore, the reinforcing portion 1 integrated with the nozzle body is formed.
【００１０】次いで、図３に示すように、ゴム型５を金
属性の上蓋７が付いた支持枠８の中に入れて、上蓋７、
下蓋６と中芯金２、支持枠８が一体化するように密着固
定し、上下蓋とゴム型の接合部を金属バンド（図示しな
い）等で締め付けてシールする。静水圧プレス後に支持
枠、外ゴム型を取り除いた後、成形体を抜き上げる。図
４（ａ）はこのようにして得られた成形体の縦断面図を
示し、図４（ｂ）は図４（ａ）のＡ−Ａ横断面図を示
す。この成形体をコークスブリーズ中で還元焼成する。Then, as shown in FIG. 3, the rubber mold 5 is put into a support frame 8 having a metallic upper lid 7, and the upper lid 7,
The lower lid 6, the core metal 2, and the support frame 8 are tightly fixed so as to be integrated, and the joint between the upper and lower lids and the rubber mold is tightened with a metal band (not shown) or the like to seal. After isostatic pressing, the support frame and outer rubber mold are removed, and then the molded product is pulled out. FIG. 4A shows a vertical cross-sectional view of the molded body thus obtained, and FIG. 4B shows a cross-sectional view taken along the line AA of FIG. 4A. This compact is reduction-fired in a coke breeze.
【００１１】図５（ａ）のように加工工程で、ノズルの
両短片側にカッターにて中空スリット１１を設け、給電
リード部９を構成する。本実施例ではカッターによって
中空スリットを設けたが、カッター以外に耐火物を切断
可能な工具を使用してもよい。この中空スリット１１
は、ノズル下端部の溶融金属浸漬ラインｍより上まで設
け、その下１０は、ノズル短片壁４と一体化させ、所定
寸法に加工仕上げる。図５（ｂ）は図５（ａ）のＢ−Ｂ
位置での横断面図を示し、ノズル壁１３と給電リード部
９とは中空スリット１１を介して絶縁されている。図５
（ｃ）は図５（ａ）のＣ−Ｃ位置での横断面図を示し、
給電リード部とノズル壁が一体化している。給電リード
部９の上部は、電源ケーブルとの接続のためにボルト孔
１２を開孔する。In the processing step as shown in FIG. 5 (a), hollow slits 11 are provided by cutters on both short side portions of the nozzle to form the power supply lead portion 9. Although the hollow slit is provided by the cutter in this embodiment, a tool capable of cutting a refractory material may be used instead of the cutter. This hollow slit 11
Is provided above the molten metal dipping line m at the lower end of the nozzle, and the lower portion 10 is integrated with the nozzle short piece wall 4 and processed and finished to a predetermined size. FIG. 5B is BB of FIG. 5A.
The cross-sectional view at the position is shown, and the nozzle wall 13 and the power supply lead portion 9 are insulated via the hollow slit 11. Figure 5
(C) shows a cross-sectional view taken along the line CC of FIG. 5 (a),
The power supply lead and the nozzle wall are integrated. A bolt hole 12 is formed in the upper portion of the power supply lead portion 9 for connection with a power cable.
【００１２】最終工程で、酸化防止材（図示しない）を
ノズルの内外面に塗布する。本発明で製造した一例のノ
ズルを図６に示す。ノズル全長さ：１０００ｍｍ、溶融
金属が流れる内孔は３０ｍｍ、２８０ｍｍの長方形であ
り、補強部材：２０ｍｍ×９００ｍｍである。リード部
は幅：５０ｍｍ，厚み：５０ｍｍ，長さ：９００ｍｍで
あり、ノズル上部ではノズル壁と１０ｍｍの中空スリッ
トで絶縁されている。ノズル下部１００ｍｍはリード部
と一体化してある。リード部上部には、１０ｍｍ径のボ
ルト孔が４個設置されているものである。In the final step, an antioxidant (not shown) is applied to the inner and outer surfaces of the nozzle. An example nozzle manufactured by the present invention is shown in FIG. The total length of the nozzle is 1000 mm, the inner hole through which the molten metal flows is a rectangle of 30 mm and 280 mm, and the reinforcing member is 20 mm × 900 mm. The lead portion has a width of 50 mm, a thickness of 50 mm and a length of 900 mm, and is insulated from the nozzle wall by a 10 mm hollow slit at the upper part of the nozzle. The lower 100 mm of the nozzle is integrated with the lead part. Four bolt holes each having a diameter of 10 mm are installed on the upper portion of the lead portion.
【００１３】このようにして製造した薄板鋳造用ノズル
に電流域として５００−３０００Ａの電流を給電リード
部上部より通電し、ノズル先端を１６００℃に加熱しな
がら６０分間鋳造したが、溶融金属圧による割れもな
く、良好な通電加熱が出来、ノズル閉塞も皆無であっ
た。A current of 500 to 3000 A as a current region was applied to the thin plate casting nozzle thus produced from the upper part of the power supply lead, and the nozzle tip was heated to 1600 ° C. for 60 minutes for casting. There was no cracking, good electrical heating was possible, and there was no nozzle clogging.
【００１４】[0014]
【発明の効果】本発明の薄板鋳造用通電加熱ノズルの製
造方法は、上記のような構成であるので、以下の効果を
発揮する。 １）補強性の高いノズルが得られるため、実使用におけ
る信頼性が向上する。 ２）ノズル通電加熱部位と給電リード部が一体構造であ
るため、接続部でのスパーク等によるノズル損傷が無
く、安定通電加熱が出来る。EFFECTS OF THE INVENTION The method of manufacturing an electric heating nozzle for casting a thin plate of the present invention has the above-mentioned structure, and therefore exhibits the following effects. 1) Since a nozzle having a high reinforcing property is obtained, reliability in actual use is improved. 2) Since the nozzle energization heating part and the power supply lead part are integrated, there is no damage to the nozzle due to sparks at the connection part, and stable energization heating can be performed.
【図１】本発明に係わる中芯金の斜視図である。FIG. 1 is a perspective view of a cored bar according to the present invention.
【図２】本発明に係わるゴム型と中芯金の空間に導電性
耐火材料を充填した時のゴム型内の縦断面図である。FIG. 2 is a vertical cross-sectional view of the inside of the rubber mold according to the present invention when the space between the rubber mold and the core metal is filled with a conductive refractory material.
【図３】本発明に係わる上蓋をセットした後の縦断面図
である。FIG. 3 is a vertical cross-sectional view after setting the upper lid according to the present invention.
【図４】（ａ）は本発明によるノズルの成形体の縦断面
図である。 （ｂ）は（ａ）のＡ−Ａ断面図である。FIG. 4A is a vertical cross-sectional view of a molded body of a nozzle according to the present invention. (B) is an AA sectional view of (a).
【図５】（ａ）は本発明による製造後のノズル縦断面図
である。（ｂ）は（ａ）のＢ−Ｂ断面図である。（ｃ）
は（ａ）のＣ−Ｃ断面図である。FIG. 5A is a vertical cross-sectional view of the nozzle after manufacturing according to the present invention. (B) is a BB sectional view of (a). (C)
FIG. 7A is a sectional view taken along line CC of FIG.
【図６】本発明で製造したノズルの具体的形状の一例を
示す斜視図である。FIG. 6 is a perspective view showing an example of a specific shape of a nozzle manufactured according to the present invention.
１…補強部 ２…中芯金 ３…中芯金の切り込み部 ４…導電性耐火材 ５…外ゴム型 ６…下蓋 ７…上蓋 ８…支持枠 ９…給電リード部 １０…ノズルと一体化した給電リード部 １１…中空スリット １２…ボルト孔 １３…ノズル壁 ｍ…メニスカス DESCRIPTION OF SYMBOLS 1 ... Reinforcement part 2 ... Core metal 3 ... Notch part of core metal 4 ... Conductive fireproof material 5 ... Outer rubber type 6 ... Lower lid 7 ... Upper lid 8 ... Support frame 9 ... Power supply lead portion 10 ... Integral with nozzle Power supply lead part 11 ... Hollow slit 12 ... Bolt hole 13 ... Nozzle wall m ... Meniscus
───────────────────────────────────────────────────── フロントページの続き (72)発明者 花桐 誠司 大分県大分市大字西ノ洲１番地 新日本製 鐵株式会社大分製鐵所内 (72)発明者 内之倉 克己 大分県大分市大字西ノ洲１番地 新日本製 鐵株式会社大分製鐵所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Seiji Hanagiri 1st Nishinosu, Oita-shi, Oita Pref. Nippon Steel Co., Ltd. Oita Works (72) Katsumi Uchinokura 1st Nishinosu, Oita-shi, Oita Pref. Oita Steel Works, Ltd.
Claims (1)
をゴム製の外型内に収納し、導電性耐火材料を充填後、
静水圧プレスをかけ成形した後、還元焼成しノズルを製
造する方法において、前記還元焼成したノズルの両短片
側に縦方向にノズル頭部から溶融金属に浸漬されないノ
ズル下部まで、中空スリットの切り込みをいれることを
特徴とする薄板鋳造用通電加熱ノズルの製造方法。1. A molding core metal having a notch in the longitudinal direction is housed in an outer mold made of rubber, and after filling with a conductive refractory material,
After forming by applying a hydrostatic press, in the method of manufacturing a nozzle by reduction firing, in the longitudinal direction on both short side of the reduction fired nozzle from the nozzle head to the lower portion of the nozzle not immersed in the molten metal, the hollow slit is cut. A method for producing an electric heating nozzle for casting a thin plate, characterized by including:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4238536A JP2598207B2 (en) | 1992-09-07 | 1992-09-07 | Manufacturing method of electric heating nozzle for sheet casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4238536A JP2598207B2 (en) | 1992-09-07 | 1992-09-07 | Manufacturing method of electric heating nozzle for sheet casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0679444A true JPH0679444A (en) | 1994-03-22 |
| JP2598207B2 JP2598207B2 (en) | 1997-04-09 |
Family
ID=17031712
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4238536A Expired - Lifetime JP2598207B2 (en) | 1992-09-07 | 1992-09-07 | Manufacturing method of electric heating nozzle for sheet casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2598207B2 (en) |
-
1992
- 1992-09-07 JP JP4238536A patent/JP2598207B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP2598207B2 (en) | 1997-04-09 |
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