JPH0357545A - Manufacture of nozzle for gas-blow casting - Google Patents

Manufacture of nozzle for gas-blow casting

Info

Publication number
JPH0357545A
JPH0357545A JP19229189A JP19229189A JPH0357545A JP H0357545 A JPH0357545 A JP H0357545A JP 19229189 A JP19229189 A JP 19229189A JP 19229189 A JP19229189 A JP 19229189A JP H0357545 A JPH0357545 A JP H0357545A
Authority
JP
Japan
Prior art keywords
nozzle
gas
casting
combustible material
granular
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.)
Pending
Application number
JP19229189A
Other languages
Japanese (ja)
Inventor
Akihiro Tsuchinari
昭弘 土成
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Harima Ceramic Co Ltd
Original Assignee
Harima Ceramic Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Harima Ceramic Co Ltd filed Critical Harima Ceramic Co Ltd
Priority to JP19229189A priority Critical patent/JPH0357545A/en
Publication of JPH0357545A publication Critical patent/JPH0357545A/en
Pending legal-status Critical Current

Links

Landscapes

  • Continuous Casting (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)

Abstract

PURPOSE:To obtain a nozzle having excellent gas blowing function and durability by embedding a doughnut-state consumable pipe with granular and/or fibrous combustible material packed at the prescribed position where gas pool chamber is formed, forming the nozzle under pressurizing and successively burning. CONSTITUTION:At the time of forming the nozzle, into a nozzle blending material charged in a forming mold, the doughnut-state consumable pipe 7 with the granular and/or fibrous combustible material 6 packed is embedded at the position where a hollow part is formed, to form the nozzle under pressurizing. After forming, if necessary, this is dried, and successively, the burning is executed. By this method, the gas pool chamber 3 without any crack can be easily and accurately formed. The obtd. nozzle for casting has the excellent gas blowing function and durability.

Description

【発明の詳細な説明】 (産業」二の利用分!lIf) 本発明は、鋼の連続鋳造で使用される鋳造用ノズルを製
造する方法に関する。
DETAILED DESCRIPTION OF THE INVENTION (Industrial Use) The present invention relates to a method for manufacturing a casting nozzle used in continuous casting of steel.

(従来の技術) 浸漬ノズル、ロングノズル、スライディングノズル用上
ノズル・下ノズルなどの鋳造用ノズルに共通した問題と
して、ノズル閉zツがある。これは、溶鋼から析出した
アルミナがノズル孔に除々に付着堆積して生じる。そこ
で、ノズル孔の内周而からArなどの不活性ガスを吹き
込み、アルミナの付着を−1一 防止することが行われている。
(Prior Art) A common problem with casting nozzles such as immersion nozzles, long nozzles, and upper and lower nozzles for sliding nozzles is nozzle closure. This occurs because alumina precipitated from molten steel gradually adheres and accumulates in the nozzle hole. Therefore, inert gas such as Ar is blown from the inner periphery of the nozzle hole to prevent alumina from adhering.

これに使用されるガス吹き込み鋳造用ノズルは、例えば
、実開昭50−17515号公報のとおり、中空のガス
プール室をノズル孔と同心円状に内在したものが知られ
ている。使用の際には、ガス導入管を通じて供給された
不活性ガスがガスブール室でノズルの周方向に分散した
後、ノズルの耐火物組或の気孔を通ってノズル孔内周面
から噴出する。
A known gas blow casting nozzle used for this purpose includes a hollow gas pool chamber concentrically with the nozzle hole, as disclosed in, for example, Japanese Utility Model Application No. 50-17515. In use, the inert gas supplied through the gas introduction pipe is dispersed in the circumferential direction of the nozzle in the gas boule chamber, and then ejected from the inner peripheral surface of the nozzle hole through the pores of the refractory assembly of the nozzle.

(発明が解決しようとする問題点) 従来、この種の鋳造用ノズルを製造する方法は、ノズル
の戊形の際、ガスプール室に相当する形状の可燃物をノ
ズル配合物中に埋込み、ノズル焼或時の加熱で可燃物を
泪失させ、中仝部を形成している。
(Problems to be Solved by the Invention) Conventionally, the method for manufacturing this type of casting nozzle has been to embed a combustible material with a shape corresponding to a gas pool chamber in the nozzle compound when shaping the nozzle, and to form a nozzle. The combustible material is evaporated by heating during burning to form the middle part.

しかしこの方法は、可灼物がノズルカ′6或の際の加熱
、あるいはそれ自身の燃焼による高温を受けて膨張し、
ノズル成形体にキレッを生じさせるという欠点がある。
However, in this method, the combustible material expands due to the heat generated by the nozzle or the high temperature caused by its own combustion.
This has the disadvantage of causing sharpness in the nozzle molded body.

このキレッはガスプール室を起点に生じるので、ノズル
の強度低下だけでなく、ガス漏れの原因となる。
Since this sharpness occurs starting from the gas pool chamber, it not only reduces the strength of the nozzle but also causes gas leakage.

(課題を解決するための手段) 本発明は、ガスプール室となる中空部を内在したガス吹
き込み鋳造用ノズルの製造方法において、上記従来の欠
点を解決したもので、前記ガスプール質を形成させる所
定の位置に、粒状および/または繊維状の可燃物を詰め
たドーナツ状の焼失性パイプを埋設してノズルを加圧成
形し、次いで焼或することを特徴としたガス吹き込み鋳
造用ノズルの製造方法である。
(Means for Solving the Problems) The present invention solves the above-mentioned conventional drawbacks in a method of manufacturing a nozzle for gas blowing casting that includes a hollow part that becomes a gas pool chamber, and forms the gas pool quality. Manufacture of a nozzle for gas blow casting, characterized in that a donut-shaped burnable pipe filled with granular and/or fibrous combustible material is embedded in a predetermined position, the nozzle is pressure-formed, and then burned. It's a method.

(作用) ガスプール室を形成するための可燃物として、本発明で
は粒状および/または繊維状の可燃物を詰めたドーナツ
状の焼失性バイブを使用する。可燃物はノズル焼成時の
加熱を受けると膨張するが、その膨張を粒状可燃物の粒
子間あるいは繊維状可燃物の繊維間で吸収し、ノズルの
耐火物組織にキレツが発生するのを防止する。
(Function) As the combustible material for forming the gas pool chamber, the present invention uses a donut-shaped incineration vibrator filled with granular and/or fibrous combustible material. Combustible materials expand when heated during nozzle firing, but this expansion is absorbed between particles of granular combustibles or fibers of fibrous combustibles to prevent cracks from occurring in the refractory structure of the nozzle. .

また、焼失性バイブは、可燃物を保持する役割を持つ。Moreover, the burnable vibe has the role of holding combustible materials.

可燃物だけではノズルの配合中に埋設するとき、あるい
はノズル戊形時の加圧で分散し、ガスプール室を正確に
形成することができない。
Combustible materials alone cannot form a gas pool chamber accurately because they are dispersed when buried during nozzle formulation or when pressurized when the nozzle is pierced.

(実施例) 以下、図面にもとづいて本発明をさらに詳しく説明する
(Example) Hereinafter, the present invention will be explained in more detail based on the drawings.

第l図は、ノズル孔2と同心円的に中空のガスプール室
3を設けたガス吹き込み鋳造用ノズルの縦断面図である
。外殻の鉄皮4は、ノズル本体1の袖強と、不活性ガス
がノズルの外周に漏れるのを防止する役割を持つ。ガス
導入管5は鉄皮4を貫通してガスプール室3に接続され
る。同図のものは、ガスプール室3を、ノズルの高さ方
向に複数設けたが、一ケ所でもよい。また、ガスプール
室3の断面形状は同図の円形に限らず、多角形でもよい
FIG. 1 is a longitudinal cross-sectional view of a gas blow casting nozzle in which a hollow gas pool chamber 3 is provided concentrically with the nozzle hole 2. The iron skin 4 of the outer shell serves to strengthen the sleeve of the nozzle body 1 and to prevent inert gas from leaking to the outer periphery of the nozzle. The gas introduction pipe 5 passes through the iron shell 4 and is connected to the gas pool chamber 3. Although a plurality of gas pool chambers 3 are provided in the same figure in the height direction of the nozzle, it may be provided at one location. Further, the cross-sectional shape of the gas pool chamber 3 is not limited to the circular shape shown in the figure, but may be polygonal.

以上の構造をしたガス吹き込み鋳造用ノズルを製造する
において、本発明は、第2図のとおり、まず、粒状およ
び/または繊維状の可燃物6を詰めたドーナツ状の焼失
性パイプ7を用意する。
In manufacturing the gas blowing casting nozzle having the above structure, the present invention first prepares a donut-shaped burnable pipe 7 filled with granular and/or fibrous combustible material 6, as shown in FIG. .

焼失性パイブ7は紙、布、合成樹脂などの材質を用いる
ことができる。入手しやすいという面で、各種のサイズ
が市販されている塩化ビニールパイプが好ましい。肉厚
は、可燃物6を詰め込む際に破れない程度の強度があれ
ば、できる限り薄い方が好ましい。長さ方向に直角の断
面形状は、形戊しようとするガスプール室3に合せ、円
形または多角形とする。
The burnable pipe 7 can be made of a material such as paper, cloth, or synthetic resin. PVC pipes, which are commercially available in various sizes, are preferred because they are easily available. It is preferable that the wall thickness be as thin as possible, as long as it is strong enough not to tear when the combustible material 6 is packed therein. The cross-sectional shape perpendicular to the length direction is circular or polygonal depending on the gas pool chamber 3 to be shaped.

内径、外径についても同様に、ガスプール室3に位置お
よびサイズに合わせて決定する。
The inner diameter and outer diameter are similarly determined according to the position and size of the gas pool chamber 3.

焼失性パイプ7に詰める粒状可燃物としては、例えば合
戊樹脂ビーズ、材木のチップなどである。繊維状可燃物
としては、右機質の合或繊維、天然繊維などである。
The particulate combustible material packed in the burnable pipe 7 includes, for example, synthetic resin beads, wood chips, and the like. Examples of fibrous combustible materials include synthetic fibers and natural fibers.

ノズルを戊形する際、戊形形内に投入したノズル配合物
中に、粒状および/または繊維状の可燃物6を詰めた前
記のドーナツ状の焼失性パイプ7を中空部を形或する位
置に埋設し、ノズルを加圧成形する。
When shaping the nozzle, the donut-shaped burnable pipe 7 filled with granular and/or fibrous combustible material 6 is placed in the nozzle mixture charged into the nozzle at a position where a hollow part is to be formed. The nozzle is then pressure molded.

成形後は必要により乾燥し、次いで焼威する。焼或温度
はノズル材質などに合わせて決定するものである。例え
ば1500℃〜1800℃とする。この焼成により焼失
性パイプ7可燃物が消失する。
After molding, it is dried if necessary and then burned. The firing temperature is determined depending on the nozzle material, etc. For example, the temperature is 1500°C to 1800°C. By this firing, the combustible material in the burnable pipe 7 disappears.

図面ではスライディングノズル用上ノズルを対象にして
説明したが、本発明はこれに限定されない。ガス吹き込
み機能を備えるものとして浸漬ノズル、ロングノズル、
下ノズルなどがあり、本発明はこれらの鋳造用ノズルの
製造にも使用できる。
Although the upper nozzle for the sliding nozzle has been described in the drawings, the present invention is not limited thereto. Immersion nozzles, long nozzles, and
There are lower nozzles, etc., and the present invention can also be used to manufacture these casting nozzles.

(効果) 本発明は以上に説明したように、ガス吹き込み鋳造用ノ
ズルの製造において、キレツのないガスプール室を容易
、かつ正確に形戒することができる。したがって、本発
明より得られる鋳造川ノズルは、ガス吹き込み機能およ
び耐用性に優れたものとなる,
(Effects) As described above, the present invention can easily and accurately form a gas pool chamber without sharpness in manufacturing a gas blow casting nozzle. Therefore, the cast river nozzle obtained by the present invention has excellent gas blowing function and durability.

【図面の簡単な説明】[Brief explanation of drawings]

第工図は、ガス吹き込み鋳造用ノズルの縦断面図である
。 第2図は、粒状および/または繊維状の可燃物を詰めた
ドーナツ状の焼失性パイプの一部破断斜視図である。 1・・・ノズル本体    5・・・ガス導入管2・・
・ノズル孔     6・・・可燃物3・・・ガスプー
ル室   7・・・焼失性バイブ4・・・鉄 皮
The construction drawing is a longitudinal sectional view of a gas blowing casting nozzle. FIG. 2 is a partially cutaway perspective view of a donut-shaped burnable pipe filled with granular and/or fibrous combustible material. 1... Nozzle body 5... Gas introduction pipe 2...
・Nozzle hole 6...Flammable material 3...Gas pool chamber 7...Burnable vibrator 4...Iron skin

Claims (1)

【特許請求の範囲】[Claims] 中空のガスプール室を内在したガス吹き込み鋳造用ノズ
ルの製造方法において、前記ガスプール質を形成させる
所定の位置に、粒状および/または繊維状の可燃物を詰
めたドーナツ状の焼失性パイプを埋設してノズルを加圧
成形し、次いで焼成することを特徴としたガス吹き込み
鋳造用ノズルの製造方法。
A method for manufacturing a gas blowing casting nozzle containing a hollow gas pool chamber, in which a donut-shaped burnable pipe filled with granular and/or fibrous combustible material is buried in a predetermined position where the gas pool material is formed. 1. A method for producing a nozzle for gas blow casting, characterized in that the nozzle is pressure-molded and then fired.
JP19229189A 1989-07-24 1989-07-24 Manufacture of nozzle for gas-blow casting Pending JPH0357545A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19229189A JPH0357545A (en) 1989-07-24 1989-07-24 Manufacture of nozzle for gas-blow casting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19229189A JPH0357545A (en) 1989-07-24 1989-07-24 Manufacture of nozzle for gas-blow casting

Publications (1)

Publication Number Publication Date
JPH0357545A true JPH0357545A (en) 1991-03-12

Family

ID=16288835

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19229189A Pending JPH0357545A (en) 1989-07-24 1989-07-24 Manufacture of nozzle for gas-blow casting

Country Status (1)

Country Link
JP (1) JPH0357545A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009070459A (en) * 2007-09-12 2009-04-02 Seiko Epson Corp Conveying mechanism and information processing apparatus including the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009070459A (en) * 2007-09-12 2009-04-02 Seiko Epson Corp Conveying mechanism and information processing apparatus including the same

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