JPH07232264A - Heating oxiidation preventing method of molten metal in pouring machine for casting and device therefor - Google Patents

Heating oxiidation preventing method of molten metal in pouring machine for casting and device therefor

Info

Publication number
JPH07232264A
JPH07232264A JP2569594A JP2569594A JPH07232264A JP H07232264 A JPH07232264 A JP H07232264A JP 2569594 A JP2569594 A JP 2569594A JP 2569594 A JP2569594 A JP 2569594A JP H07232264 A JPH07232264 A JP H07232264A
Authority
JP
Japan
Prior art keywords
molten metal
gas
heating
tap hole
temperature
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
JP2569594A
Other languages
Japanese (ja)
Inventor
Kosaku Yamada
宏作 山田
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.)
TAFUKO KK
Original Assignee
TAFUKO KK
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 TAFUKO KK filed Critical TAFUKO KK
Priority to JP2569594A priority Critical patent/JPH07232264A/en
Publication of JPH07232264A publication Critical patent/JPH07232264A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To maintain molten metal to a prescribed temp. and to prevent molten metal-from oxidation so as to prevent defect of casting by maintaining molten metal to the prescribed temp. with heater arranged at a tapping hole part 5 and introducing the oxidation preventing gas of inert gas, etc., to the molten metal in the tapping hole. CONSTITUTION:A heater 14 heats a tapping hole part 5, by the heat, a molten metal 3 in the tapping hole part 5 is heated to the prescribed temp. At this heating, the heater 14 is not directly brought in contact with the molten metal 3, also, a harmful gas due to combustion gas is not absorbed in the molten metal 3. Also, an oxidation preventing gas such as inert gas, etc., is introduced in the molten metal 3 through a gas introducing hole 12, the molten metal 3 is covered with oxidation preventing gas, the molten metal is prevented from oxidation. On the inner circumferential surface of the tapping hole part 5, a porous body 10, in which the oxidation preventing gas can pass through, is provided, from the outside of the tapping hole part 5 toward the inside, the oxidation preventing gas is easily introduced by simple structure.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、溶湯槽から出湯口部ま
での溶湯の温度維持及び酸化を防止する鋳造用の注湯機
における溶湯の加熱及び酸化防止処理方法及びその装置
に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for heating and preventing oxidation of molten metal in a casting pouring machine for preventing the temperature maintenance and oxidation of the molten metal from the molten metal tank to the tap hole and its apparatus.

【0002】[0002]

【従来の技術】従来の注湯機は、図3に示す如く溶湯槽
50に溶融された溶湯51が貯留されており、この溶湯槽50
の出湯口部53には、ガスバーナー54が設けられ、該ガス
バーナー54からLP燃焼ガスが溶湯51に向けて噴出され
るようになっている。即ち、溶湯51が出湯口部53を通過
してノズル55から鋳型(図示省略)に注湯されるのであ
るが、この場合に、溶湯51がノズル55を閉塞しないよう
に溶湯51の温度を所定の温度に維持すると共に、溶湯51
の酸化を防止する必要がある。そこで、上記ガスバーナ
ー54からLP燃焼ガスを溶湯51に吹き込むことにより、
溶湯51を加熱すると共に、溶湯表面を大気から遮断して
その酸化の防止を図っている。
2. Description of the Related Art A conventional pouring machine is a molten metal tank as shown in FIG.
Molten molten metal 51 is stored in this molten metal tank 50.
A gas burner 54 is provided at the hot water outlet portion 53, and the LP combustion gas is ejected from the gas burner 54 toward the molten metal 51. That is, the molten metal 51 passes through the tap hole portion 53 and is poured from a nozzle 55 into a mold (not shown). In this case, the temperature of the molten metal 51 is set to a predetermined value so that the molten metal 51 does not block the nozzle 55. While maintaining the temperature of the molten metal 51
It is necessary to prevent the oxidation of. Therefore, by blowing the LP combustion gas from the gas burner 54 into the molten metal 51,
The molten metal 51 is heated and the surface of the molten metal is shielded from the atmosphere to prevent its oxidation.

【0003】[0003]

【発明が解決しようとする課題】しかしながら、前記従
来の装置は、LP燃焼ガスの燃焼時に発生するプロパ
ン,ブタン等の有害なガスが、溶湯51中に吸収されるた
め、溶湯51の品質を低下させ製品となる鋳物に欠陥が生
じる原因となっていた。
However, in the above-mentioned conventional apparatus, since the harmful gases such as propane and butane generated during the combustion of the LP combustion gas are absorbed in the molten metal 51, the quality of the molten metal 51 is deteriorated. This caused defects in the cast product.

【0004】本発明は、上記の如き従来の問題点に鑑み
てなされたもので、溶湯槽から鋳型へ到る溶湯を所定の
温度に維持し、且つ、加熱時に溶湯内に有毒ガスが吸収
されるのを阻止して、鋳物に欠陥が生じることがないよ
うにすることを課題とする。
The present invention has been made in view of the conventional problems as described above, and maintains the molten metal from the molten metal tank to the mold at a predetermined temperature and absorbs toxic gas into the molten metal during heating. It is an object of the present invention to prevent the occurrence of defects in castings by preventing the occurrence of defects.

【0005】[0005]

【課題を解決するための手段】本発明は上記課題を解決
するために鋳造用の注湯機における溶湯の加熱及び酸化
防止処理方法及びその装置としてなされたもので、鋳造
用の注湯機における溶湯の加熱及び酸化防止処理方法と
しての特徴は、鋳型に注湯される溶湯3が貯留されてい
る溶湯槽1の出湯口部5に設けられたヒーター14にて、
溶湯3を所定の温度に維持し、しかも、不活性ガス等の
酸化防止用ガスを、出湯口部5内の溶湯3に導入するよ
うにしたことにある。
The present invention has been made as a method and apparatus for heating and preventing oxidation of molten metal in a pouring machine for casting in order to solve the above-mentioned problems, and in a pouring machine for casting. The characteristic of the method for heating the molten metal and the antioxidation treatment is that the heater 14 provided at the tap hole portion 5 of the molten metal tank 1 in which the molten metal 3 poured into the mold is stored,
This is because the molten metal 3 is maintained at a predetermined temperature, and an antioxidant gas such as an inert gas is introduced into the molten metal 3 inside the tap hole 5.

【0006】鋳造用の注湯機における溶湯の加熱及び酸
化防止処理装置としての特徴は、溶湯槽1に貯留されて
いる溶湯3を、鋳型側に注ぐための出湯口部5が溶湯槽
1に設けられ、該出湯口部5には溶湯3を加熱するため
の加熱手段が設けられ、しかも、溶湯3の酸化を防止す
るように構成された鋳造用の注湯機において、前記加熱
手段は前記出湯口部5を加熱可能なヒーター14からな
り、出湯口部5には溶湯3に不活性ガス等の酸化防止用
ガスを導入可能なガス導入口12が設けられてなることに
ある。
[0006] A feature of the molten metal heating and antioxidation treatment device in a pouring machine for casting is that the molten metal tank 1 has a tap hole 5 for pouring the molten metal 3 stored in the molten metal tank 1 to the mold side. In the casting pouring machine, which is provided, the heating means for heating the molten metal 3 is provided at the tap hole portion 5, and the heating means is configured to prevent oxidation of the molten metal 3. This is because it comprises a heater 14 capable of heating the tap hole portion 5, and the tap hole portion 5 is provided with a gas introduction port 12 capable of introducing an antioxidant gas such as an inert gas into the molten metal 3.

【0007】しかも、前記出湯口部5内周面には、前記
酸化防止用ガスが通過可能な多孔性のポーラス体10が設
けられ、前記ガス導入口12から導入される酸化防止用ガ
スが該多孔性のポーラス体10を介して溶湯3に導入可能
に設けられている。
Moreover, a porous porous body 10 through which the antioxidant gas can pass is provided on the inner peripheral surface of the tap hole 5, and the antioxidant gas introduced from the gas inlet 12 is It is provided so that it can be introduced into the molten metal 3 via the porous body 10.

【0008】また、前記溶湯3の温度を検出する温度セ
ンサー15と、該温度センサー15による信号に基づいて溶
湯3の温度を所定の温度に制御する制御装置23が設けら
れていることにある。
A temperature sensor 15 for detecting the temperature of the molten metal 3 and a controller 23 for controlling the temperature of the molten metal 3 to a predetermined temperature based on a signal from the temperature sensor 15 are provided.

【0009】[0009]

【作用】本発明において、ヒーター14は出湯口部5を加
熱させ、その熱により出湯口部5内にある溶湯3を所定
の温度に加熱させる。この加熱に際しては、ヒーター14
が直接に溶湯3に接触することはなく、しかも、LP燃
焼ガスを使用していないことから、燃焼ガスによる有害
なガスが溶湯3内に吸収されることはない。
In the present invention, the heater 14 heats the tap hole portion 5, and the heat causes the molten metal 3 in the tap portion 5 to be heated to a predetermined temperature. Heater 14
Does not directly contact the molten metal 3, and since the LP combustion gas is not used, harmful gas due to the combustion gas is not absorbed in the molten metal 3.

【0010】また、不活性ガス等の酸化防止用ガスは、
ガス導入口12を介して溶湯3に導入され、溶湯3が酸化
防止用ガスに覆われることから、溶湯3が酸化するのを
効果的に防止することが可能となる。しかも、酸化防止
用ガスのガス膜が、ノズル部分を含む出湯口部5の内面
に形成され、該内面が直接溶湯3に晒され難いため、出
湯口部5の内面が溶湯3により摩耗されることもほとん
どない。
The antioxidant gas such as an inert gas is
Since the molten metal 3 is introduced into the molten metal 3 through the gas introduction port 12 and is covered with the antioxidant gas, it is possible to effectively prevent the molten metal 3 from being oxidized. Moreover, a gas film of the antioxidant gas is formed on the inner surface of the tap hole portion 5 including the nozzle portion, and since the inner surface is difficult to be directly exposed to the molten metal 3, the inner surface of the tap hole portion 5 is worn by the molten metal 3. Rarely.

【0011】前記出湯口部5内周面には、前記酸化防止
用ガスが通過可能な多孔性のポーラス体10が設けられ、
前記ガス導入口12から導入される酸化防止用ガスが該多
孔性のポーラス体10を介して溶湯3に導入可能に設けら
れている場合には、出湯口部5の構造をガスが通過する
多孔性を有する内面部と、ガスの通過しない外面部との
二重構造にできることから、出湯口部5の外部から内部
に向けて簡単な構造で容易に酸化防止用ガスを導入する
ことができる。
On the inner peripheral surface of the tap hole 5, there is provided a porous porous body 10 through which the antioxidant gas can pass.
When the antioxidant gas introduced from the gas inlet 12 is provided so as to be able to be introduced into the molten metal 3 through the porous body 10, the porosity through which the gas passes through the structure of the tap hole portion 5. Since it is possible to have a double structure of an inner surface portion having a property and an outer surface portion through which gas does not pass, it is possible to easily introduce the antioxidant gas from the outside to the inside of the tap hole 5 with a simple structure.

【0012】しかも、前記溶湯3の温度を検出するため
の温度センサー15と、該温度センサー15による信号に基
づいて溶湯3の温度を所定の温度に制御する制御装置23
が設けられているので、制御装置23は温度センサー15の
信号により、溶湯3の温度を所定の温度に維持する安定
した温度制御を行う。
Moreover, a temperature sensor 15 for detecting the temperature of the molten metal 3 and a control device 23 for controlling the temperature of the molten metal 3 to a predetermined temperature based on a signal from the temperature sensor 15.
Is provided, the control device 23 performs stable temperature control for maintaining the temperature of the molten metal 3 at a predetermined temperature by the signal of the temperature sensor 15.

【0013】[0013]

【実施例】以下、本発明の一実施例について図面に従っ
て説明する。図1は本発明の一実施例を示し、1は例え
ば加圧式、電磁ポンプ式、可斜式、ストッパー式等の従
来公知の自動注湯機及び手動式注湯機における溶湯槽を
示し、その内部には、溶湯(例えば銅,鉄等の溶融状態
にある金属及び合金)3が貯留されている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention, and 1 shows a molten metal tank in a conventionally known automatic pouring machine and manual pouring machine, such as a pressurizing type, an electromagnetic pump type, a tilting type and a stopper type. A molten metal (for example, a metal and an alloy in a molten state such as copper and iron) 3 is stored inside.

【0014】5は溶湯槽1の上部一端に突設された出湯
口部で、前記溶湯槽1の口部1aから水平に突設する円筒
状のパイプからなる水平部6と、該水平部6から下方に
垂下する垂直部7とから略L字状に形成されている。水
平部6と垂直部7には前記溶湯槽1内に連通する流通路
9が設けられ、該流通路9を経て溶湯槽1内の溶湯3は
図示省略の鋳型に注湯可能となっている。尚、出湯口部
5の水平部6と垂直部7に使用する材質は熱伝導性の良
好な材質のものが好ましいが、特に限定されるものでは
ない。
Reference numeral 5 denotes a tap hole projecting from one end of the upper part of the molten metal tank 1. A horizontal part 6 consisting of a cylindrical pipe projecting horizontally from the mouth part 1a of the molten metal tank 1 and the horizontal part 6 Is formed in a substantially L-shape from the vertical portion 7 that hangs downward from. The horizontal portion 6 and the vertical portion 7 are provided with a flow passage 9 communicating with the inside of the molten metal tank 1, and the molten metal 3 in the molten metal tank 1 can be poured into a mold (not shown) via the flow passage 9. . The material used for the horizontal portion 6 and the vertical portion 7 of the tap hole portion 5 is preferably a material having good thermal conductivity, but is not particularly limited.

【0015】10は溶湯3の酸化を防止するためのAr,
2 等の不活性ガスが通過可能な多孔質性の筒状のポー
ラス体で、前記水平部6の内面に形成された凹部11に取
付けられており、該ポーラス体10の内面は水平部6の内
面と面一となっている。12は水平部6に挿通されその先
端が前記ポーラス体10に当接するガス導入口で、該ガス
導入口12は図外のガス供給装置に接続されており、該ガ
ス供給装置から供給されるガスが、ポーラス体10を介し
て溶湯3に導入されるようになっている。
10 is Ar for preventing the oxidation of the molten metal 3,
It is a porous cylindrical porous body through which an inert gas such as N 2 can pass, and is attached to a concave portion 11 formed on the inner surface of the horizontal portion 6, and the inner surface of the porous body 10 has the horizontal portion 6. It is flush with the inner surface of the. Reference numeral 12 denotes a gas introduction port that is inserted into the horizontal portion 6 and has its tip in contact with the porous body 10. The gas introduction port 12 is connected to a gas supply device (not shown), and the gas supplied from the gas supply device. However, it is introduced into the molten metal 3 through the porous body 10.

【0016】14は溶湯3を加熱するための電気ヒーター
で、前記水平部6の外面の全周にわたって被覆されてい
る。即ち、電気ヒーター14は、図2(イ)に示す如く着
脱自在に上下に2つ割りされた筒状のヒーターケース14
a ,14a と、該ヒーターケース14a ,14a の内面に設け
られた熱源14b とから構成されている。
Reference numeral 14 denotes an electric heater for heating the molten metal 3, which is covered over the entire outer surface of the horizontal portion 6. That is, as shown in FIG. 2 (a), the electric heater 14 is a cylindrical heater case 14 which is detachably divided into two upper and lower parts.
a and 14a and a heat source 14b provided on the inner surface of the heater cases 14a and 14a.

【0017】15は溶湯3の温度を検出するための熱電対
からなる温度センサーで、前記水平部6に挿通され、そ
の先端はポーラス体10に接触している。即ち、該温度セ
ンサー15は、溶湯3が接触するポーラス体10及び水平部
6が前記電気ヒーター14により加熱されると、その温度
を検出し、温度センサー15の信号により水平部6内の溶
湯3が所定の温度を維持するように、サイリスタ制御を
行う制御装置23にて電気ヒーター14の制御を行うように
なっている。
Reference numeral 15 denotes a temperature sensor composed of a thermocouple for detecting the temperature of the molten metal 3, which is inserted into the horizontal portion 6 and has its tip in contact with the porous body 10. That is, the temperature sensor 15 detects the temperature of the porous body 10 in contact with the molten metal 3 and the horizontal portion 6 when the horizontal heater 6 is heated by the electric heater 14, and the signal from the temperature sensor 15 detects the temperature of the molten metal 3 in the horizontal portion 6. The electric heater 14 is controlled by the control device 23 for controlling the thyristor so that the electric heater 14 maintains a predetermined temperature.

【0018】17は前記垂直部7の下端部に設けられたノ
ズルで、その内面に設けられた凹部17a には水平部6に
設けられたポーラス体10と同材質のポーラス体10a が設
けられている。また、ノズル17の外周には電気ヒーター
19が設けられ、該電気ヒーター19は図2(ロ)に示す如
く、テーパー状で且つ筒状を呈するヒーターケース19a
と、該ヒーターケース19a の内面に設けられた熱源19b
とから構成されている。
Reference numeral 17 is a nozzle provided at the lower end of the vertical portion 7, and a concave portion 17a provided on the inner surface thereof is provided with a porous body 10a of the same material as the porous body 10 provided in the horizontal portion 6. There is. In addition, an electric heater is installed around the nozzle 17.
As shown in FIG. 2B, the electric heater 19 is provided with a heater case 19a having a tapered and tubular shape.
And a heat source 19b provided on the inner surface of the heater case 19a.
It consists of and.

【0019】前記出湯口部5は、予め形成されたパイプ
状の水平部6及び垂直部7とノズル17等を適宜組み合わ
せたもので、水平部6と溶湯槽1との継ぎ目や、垂直部
7とノズル17との継ぎ目は、シール材(補修用耐火物)
でシールされている。尚、このシールに際しては、前記
電気ヒーター14,19により1乃至2時間シール部分を加
熱することにより、焼成する。尚、前記ノズル17には温
度センサー21及びガス導入口12aが挿通されている。25
は断熱綿等からなる断熱体で、前記水平部6、垂直部
7、ノズル17及び電気ヒーター14,19全体を被覆してい
る。
The tap hole portion 5 is a combination of a pipe-shaped horizontal portion 6 and a vertical portion 7 which are formed in advance, a nozzle 17 and the like, and the joint between the horizontal portion 6 and the molten metal tank 1 and the vertical portion 7 are formed. The seal between the nozzle and the nozzle 17 is a sealant (refractory for repair)
It is sealed with. In this sealing, the electric heaters 14 and 19 heat the sealed portion for 1 to 2 hours for firing. A temperature sensor 21 and a gas inlet 12a are inserted through the nozzle 17. twenty five
Is a heat-insulating body made of heat-insulating cotton or the like, and covers the horizontal portion 6, the vertical portion 7, the nozzle 17, and the electric heaters 14, 19 as a whole.

【0020】本実施例の装置は以上の構成からなり、次
に、上記装置を用いて溶湯を鋳型に供給する場合につい
て説明する。先ず、水平部6及び垂直部7に設けられた
電気ヒーター14,19が、水平部6及び垂直部7を外側か
ら加熱させると、両水平部6及び垂直部7内周面に取付
けられたポーラス体10,10a が高温となり、ポーラス体
10,10a に接触する溶湯3を加熱することとなる。
The apparatus of this embodiment has the above-mentioned structure. Next, the case of using the above apparatus to supply the molten metal to the mold will be described. First, when the electric heaters 14 and 19 provided in the horizontal portion 6 and the vertical portion 7 heat the horizontal portion 6 and the vertical portion 7 from the outside, a porous material attached to the inner peripheral surfaces of both the horizontal portion 6 and the vertical portion 7 is provided. Body 10, 10a gets hot and porous
The molten metal 3 that contacts the 10 and 10a is heated.

【0021】水平部6及び垂直部7のポーラス体10,10
a の加熱温度を温度センサー15,21が検出し、その信号
に基づいて制御装置23は、出湯口部5を通過する溶湯3
の温度が所定の温度となるように、電気ヒーター14,19
をサイリスタ制御する。従って、溶湯3は溶湯槽1から
ノズル17に到るまで溶湯槽1内と同じ温度に維持するこ
とができ、溶湯3が温度低下によりノズル17等を閉塞さ
せてしまうおそれはないと共に、上記水平部6及び垂直
部7の全周にわたって電気ヒーター14,19が、それぞれ
被覆されているので、ガスバーナーによる加熱に比し、
出湯口部5内を流れる溶湯3の温度を略均一にすること
ができ、ガスバーナーによる加熱手段において問題とな
っていた局部的な溶湯3(初湯)の温度低下を発生させ
ることはなく、初湯により製品となる鋳物に欠陥が生じ
るのを防止できる。
Porous bodies 10, 10 of the horizontal portion 6 and the vertical portion 7
The temperature sensors 15 and 21 detect the heating temperature of a, and the control device 23 controls the molten metal 3 passing through the tap hole portion 5 based on the signal.
Electric heaters 14, 19 so that the temperature of
Control the thyristor. Therefore, the molten metal 3 can be maintained at the same temperature as that in the molten metal tank 1 from the molten metal tank 1 to the nozzle 17, and there is no possibility that the molten metal 3 will block the nozzle 17 and the like due to the temperature decrease, and Since the electric heaters 14 and 19 are respectively coated over the entire circumference of the part 6 and the vertical part 7, as compared with the heating by the gas burner,
The temperature of the molten metal 3 flowing in the tap hole portion 5 can be made substantially uniform, and the local temperature drop of the molten metal 3 (initial molten metal), which has been a problem in the heating means by the gas burner, does not occur, and As a result, it is possible to prevent defects in the cast product.

【0022】一方、ガス供給装置から供給される不活性
ガスは、ガス導入口12,12aを介してポーラス体10,10
a に導入され、該ポーラス体10,10a を通過して溶湯3
に吹き込まれる。従って、不活性ガスによるガスパージ
により、溶湯3の酸化を防止することができるのであ
る。尚、不活性ガスは、水平部6及び垂直部7がガスを
通過させないことから、ポーラス体10,10a の全体に容
易に行き渡り、ポーラス体10,10a 全体でまんべんなく
不活性ガスを溶湯3に吹き込むことが可能となる。しか
も、不活性ガスのガス膜が、ポーラス体10,10a を含む
水平部6及び垂直部7の内面に形成され、該内面が直接
溶湯3に晒され難いため、出湯口部5の内面が溶湯3に
より容易に摩耗されることもほとんどない。
On the other hand, the inert gas supplied from the gas supply device is supplied through the gas inlets 12 and 12a to the porous bodies 10 and 10.
It is introduced into a and passes through the porous bodies 10 and 10a, and the molten metal 3
Is blown into. Therefore, it is possible to prevent the molten metal 3 from being oxidized by the gas purging with the inert gas. In addition, since the horizontal portion 6 and the vertical portion 7 do not allow gas to pass, the inert gas easily spreads over the entire porous body 10, 10a, and blows the inert gas into the molten metal 3 evenly over the entire porous body 10, 10a. It becomes possible. Moreover, a gas film of an inert gas is formed on the inner surfaces of the horizontal portion 6 and the vertical portion 7 including the porous bodies 10 and 10a, and since the inner surfaces are difficult to be directly exposed to the molten metal 3, the inner surface of the tap hole portion 5 is the molten metal. Also, it is hardly worn due to 3.

【0023】また、上記出湯口部5のメンテナンスを行
う場合には、断熱体25を除去した後に、電気ヒーター14
のヒーターケース14a ,14a を分割して熱源14b の交換
等を行うと共に、ノズル17と水平部6及び水平部6の交
換に際しては、それぞれの継ぎ目から交換し、予め形成
されている新たな水平部6及び水平部6を溶湯槽1側に
再びシール材でシールすれば良い。
In addition, when the maintenance of the tap hole portion 5 is performed, the electric heater 14 is removed after removing the heat insulator 25.
The heater cases 14a, 14a are divided and the heat source 14b is replaced, and when the nozzle 17 and the horizontal portion 6 and the horizontal portion 6 are exchanged, the nozzles are exchanged from their respective joints and a new horizontal portion formed in advance. 6 and the horizontal portion 6 may be sealed again on the side of the molten metal tank 1 with a sealing material.

【0024】従って、従来は例えば、出湯口部5を形成
するに際して、ノズル以外は全て不定型耐火物で施工す
るため、成型から自然乾燥,抜型及び焼成までの一連の
施工作業を、メンテナンス毎に要していたが、本実施例
では、上記の如く予め形成された出湯口部5の水平部6
を溶湯槽1側のシールしたり、垂直部7にノズル17をシ
ールする成型工程と、そのシール部を電気ヒーター14,
19で1乃至2時間加熱する焼成工程のみで良く、出湯口
部5のメンテナンスを容易且つ迅速に行える利点があ
る。
Therefore, conventionally, for example, when forming the tap hole portion 5, since all except the nozzle are constructed with an irregular refractory material, a series of construction work from molding to natural drying, die-cutting and firing is performed for each maintenance. Although required, in this embodiment, the horizontal portion 6 of the tap hole portion 5 formed in advance as described above is used.
Molding process for sealing the molten metal tank 1 side, or for sealing the nozzle 17 in the vertical portion 7, and the sealing portion for the electric heater 14,
Only the firing step of heating at 19 for 1 to 2 hours is required, and there is an advantage that maintenance of the tap hole portion 5 can be performed easily and quickly.

【0025】本発明は上記の実施例に限定されるもので
はなく、ポーラス体10は水平部6内周の全周にわたって
設けたが、板状のものを部分的に設けることも可能であ
る。
The present invention is not limited to the above embodiment, and the porous body 10 is provided over the entire inner circumference of the horizontal portion 6, but it is also possible to partially provide a plate-like body.

【0026】また、電気ヒーター14,19及びガス導入口
12,12a は、上記のように加熱効率及び酸化防止効率を
良好にする理由から水平部6及び垂直部7にそれぞれ設
けることが好ましいが、これに限定されるものではな
く、水平部6または垂直部7の何れかに設けることも可
能であり、その個数も出湯口部5の形状及び長さに応じ
て適宜決定可能である。尚、出湯口部5とは、溶湯槽1
から鋳型へ注湯される溶湯3を導く部分を意味し、円形
以外に矩形の筒状のものやトイとしての機能を備えたも
のも含む概念である。
Further, the electric heaters 14 and 19 and the gas introduction port
It is preferable to provide 12 and 12a in the horizontal portion 6 and the vertical portion 7 respectively for the reason of improving the heating efficiency and the oxidation preventing efficiency as described above, but the present invention is not limited to this, and the horizontal portion 6 or the vertical portion It is also possible to provide in any of the parts 7, and the number thereof can be appropriately determined according to the shape and length of the tap hole part 5. The tap hole 5 is the molten metal tank 1
It means a portion that guides the molten metal 3 poured from the mold to the mold, and is a concept including not only a circular shape but also a rectangular cylindrical shape and a function having a function as a toy.

【0027】しかも、酸化防止用ガスとは、上記不活性
ガスに限定されるものではなく、溶湯3の材質に応じて
適宜決定可能である。
Moreover, the antioxidant gas is not limited to the above-mentioned inert gas, but can be appropriately determined depending on the material of the molten metal 3.

【0028】[0028]

【発明の効果】以上のように本発明において、前記加熱
手段は前記出湯口部に設けられたヒーターからなり、出
湯口部には溶湯に不活性ガス等の酸化防止用ガスを導入
可能なガス導入口が設けられているので、溶湯槽から鋳
型へ到る溶湯を所定の温度に維持でき、しかも、酸化防
止ガスが溶湯に供給されるので、従来のLP燃焼ガスを
溶湯に噴出する場合のように有害ガスが溶湯に吸収され
ることはなく、溶湯の酸化を効果的に防止すると共に、
有害ガスに起因していた鋳物の欠陥を好適に防止するこ
とができる。
As described above, in the present invention, the heating means is composed of a heater provided at the tap hole portion, and a gas capable of introducing an antioxidant gas such as an inert gas into the molten metal at the tap hole portion. Since the inlet is provided, the molten metal reaching the mold from the molten metal tank can be maintained at a predetermined temperature, and since the antioxidant gas is supplied to the molten metal, the conventional LP combustion gas can be injected into the molten metal. As described above, harmful gas is not absorbed by the molten metal, effectively preventing oxidation of the molten metal and
It is possible to preferably prevent defects in the casting that were caused by the harmful gas.

【0029】また、ヒーターは出湯口部に設けられてお
り、出湯口部を加熱させる構成であるため、加熱時の熱
損失も少なくなる。
Further, since the heater is provided at the hot water outlet port and heats the hot water outlet port, heat loss during heating is reduced.

【0030】前記溶湯の温度を検出するための温度セン
サーと、該温度センサーによる信号に基づいて溶湯の温
度を所定の温度に制御する制御装置とが設けられている
場合には、制御装置は温度センサーの信号により、溶湯
が所定の温度となるように安定した温度制御を行うこと
が可能となる。
When a temperature sensor for detecting the temperature of the molten metal and a control device for controlling the temperature of the molten metal to a predetermined temperature based on the signal from the temperature sensor are provided, the control device controls the temperature. The signal from the sensor enables stable temperature control so that the molten metal reaches a predetermined temperature.

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

【図1】本発明の一実施例を示す断面正面図。FIG. 1 is a sectional front view showing an embodiment of the present invention.

【図2】電気ヒーターを示し、(イ)は分解斜視図、
(ロ)は一部破断を含む斜視図。
FIG. 2 shows an electric heater, (a) is an exploded perspective view,
(B) is a perspective view including a partial break.

【図3】従来例を示す断面正面図。FIG. 3 is a sectional front view showing a conventional example.

【符号の説明】[Explanation of symbols]

1…溶湯槽、3…溶湯、5…出湯口部、14…ヒーター
(加熱手段)、12…ガス導入口、15…温度センサー、23
…制御装置、10…ポーラス体
DESCRIPTION OF SYMBOLS 1 ... Molten tank, 3 ... Molten metal, 5 ... Hot water outlet part, 14 ... Heater (heating means), 12 ... Gas inlet port, 15 ... Temperature sensor, 23
… Control device, 10… Porous body

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 鋳型に注湯される溶湯(3)が貯留され
ている溶湯槽(1)の出湯口部(5)に設けられたヒー
ター(14)にて、溶湯(3)を所定の温度に維持し、し
かも、不活性ガス等の酸化防止用ガスを、前記出湯口部
(5)内の溶湯(3)に導入するようにしたことを特徴
とする鋳造用の注湯機における溶湯の加熱及び酸化防止
処理方法。
A heater (14) provided at a tap (5) of a molten metal tank (1) in which the molten metal (3) to be poured into a mold is stored, and the molten metal (3) is set at a predetermined temperature. A molten metal in a pouring machine for casting, characterized in that the temperature is maintained and an antioxidant gas such as an inert gas is introduced into the molten metal (3) in the tap hole portion (5). Method for heating and antioxidation treatment.
【請求項2】 溶湯槽(1)に貯留されている溶湯
(3)を、鋳型側に注ぐための出湯口部(5)が溶湯槽
(1)に設けられ、該出湯口部(5)には溶湯(3)を
加熱するための加熱手段が設けられ、しかも、溶湯
(3)の酸化を防止するように構成された鋳造用の注湯
機において、前記加熱手段は前記出湯口部(5)を加熱
可能なヒーター(14)からなり、前記出湯口部(5)に
は溶湯(3)に不活性ガス等の酸化防止用ガスを導入可
能なガス導入口(12)が設けられてなることを特徴とす
る鋳造用の注湯機における溶湯の加熱及び酸化防止処理
装置。
2. A tap hole (5) for pouring the melt (3) stored in the melt tank (1) to the mold side is provided in the melt tank (1), and the tap hole (5) is provided. In the casting pouring machine, which is provided with heating means for heating the molten metal (3) and is configured to prevent the molten metal (3) from being oxidized, the heating means includes the tap hole ( 5) is composed of a heater (14) capable of heating, and the tap hole (5) is provided with a gas inlet (12) capable of introducing an antioxidant gas such as an inert gas into the molten metal (3). An apparatus for heating and preventing oxidation of molten metal in a casting pouring machine.
【請求項3】 前記出湯口部(5)内周面には、前記酸
化防止用ガスが通過可能な多孔性のポーラス体(10)が
設けられ、前記ガス導入口(12)から導入される酸化防
止用ガスが該多孔性のポーラス体(10)を介して溶湯
(3)に導入可能に設けられてなる請求項2に記載の鋳
造用の注湯機における溶湯の加熱及び酸化防止処理装
置。
3. A porous body (10) through which the antioxidant gas can pass is provided on the inner peripheral surface of the tap hole (5) and is introduced from the gas inlet (12). The apparatus for heating and preventing oxidation of molten metal in a casting pouring machine according to claim 2, wherein an antioxidant gas is provided so that it can be introduced into the molten metal (3) through the porous body (10). .
【請求項4】 前記溶湯(3)の温度を検出するための
温度センサー(15)と、該温度センサー(15)による信
号に基づいて溶湯(3)の温度を所定の温度に制御する
制御装置(23)が設けられてなる請求項2又は3に記載
の鋳造用の注湯機における溶湯の加熱及び酸化防止処理
装置。
4. A temperature sensor (15) for detecting the temperature of the molten metal (3), and a controller for controlling the temperature of the molten metal (3) to a predetermined temperature based on a signal from the temperature sensor (15). The apparatus for heating and preventing oxidation of molten metal in a casting pouring machine according to claim 2 or 3, further comprising (23).
JP2569594A 1994-02-23 1994-02-23 Heating oxiidation preventing method of molten metal in pouring machine for casting and device therefor Pending JPH07232264A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2569594A JPH07232264A (en) 1994-02-23 1994-02-23 Heating oxiidation preventing method of molten metal in pouring machine for casting and device therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2569594A JPH07232264A (en) 1994-02-23 1994-02-23 Heating oxiidation preventing method of molten metal in pouring machine for casting and device therefor

Publications (1)

Publication Number Publication Date
JPH07232264A true JPH07232264A (en) 1995-09-05

Family

ID=12172935

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2569594A Pending JPH07232264A (en) 1994-02-23 1994-02-23 Heating oxiidation preventing method of molten metal in pouring machine for casting and device therefor

Country Status (1)

Country Link
JP (1) JPH07232264A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101230188B1 (en) * 2010-12-27 2013-02-06 주식회사 포스코 Casting apparatus
JP2014117714A (en) * 2012-12-13 2014-06-30 Tokai Konetsu Kogyo Co Ltd Preheater for ladle
CN112276042A (en) * 2020-09-27 2021-01-29 上海大学 Method for improving casting quality

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4976730A (en) * 1972-11-28 1974-07-24
JPS5939064B2 (en) * 1975-06-03 1984-09-20 ト−レ・プランケ shape detection device
JPH04274864A (en) * 1991-02-27 1992-09-30 Kurosaki Refract Co Ltd Gas blow-in nozzle
JPH079108A (en) * 1993-06-25 1995-01-13 Masaru Nemoto Device for supplying molten metal for casting

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4976730A (en) * 1972-11-28 1974-07-24
JPS5939064B2 (en) * 1975-06-03 1984-09-20 ト−レ・プランケ shape detection device
JPH04274864A (en) * 1991-02-27 1992-09-30 Kurosaki Refract Co Ltd Gas blow-in nozzle
JPH079108A (en) * 1993-06-25 1995-01-13 Masaru Nemoto Device for supplying molten metal for casting

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101230188B1 (en) * 2010-12-27 2013-02-06 주식회사 포스코 Casting apparatus
JP2014117714A (en) * 2012-12-13 2014-06-30 Tokai Konetsu Kogyo Co Ltd Preheater for ladle
CN112276042A (en) * 2020-09-27 2021-01-29 上海大学 Method for improving casting quality

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