JP2676448B2 - A pouring nozzle for a copper alloy pouring furnace, a stopper for opening and closing the pouring nozzle, and a pouring spout device using these - Google Patents
A pouring nozzle for a copper alloy pouring furnace, a stopper for opening and closing the pouring nozzle, and a pouring spout device using theseInfo
- Publication number
- JP2676448B2 JP2676448B2 JP3348888A JP34888891A JP2676448B2 JP 2676448 B2 JP2676448 B2 JP 2676448B2 JP 3348888 A JP3348888 A JP 3348888A JP 34888891 A JP34888891 A JP 34888891A JP 2676448 B2 JP2676448 B2 JP 2676448B2
- Authority
- JP
- Japan
- Prior art keywords
- pouring
- stopper
- nozzle
- furnace
- pouring nozzle
- 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 - Lifetime
Links
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- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
- Ceramic Products (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Continuous Casting (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は、銅合金、特に青銅の
注湯に適した注湯炉の注湯ノズル及びこれを開閉するス
トッパに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pouring nozzle for a pouring furnace suitable for pouring copper alloy, especially bronze, and a stopper for opening and closing the nozzle.
【０００２】[0002]
【従来の技術】従来、自動車部品などの鋳物工場では省
力化、合理化、品質の安定化を目的として自動注湯シス
テムが多く採用され、注湯炉についても数々の技術的改
善が図られてきている。しかし、それらはほとんど鋳鉄
用であり、非鉄金属への適用例はあまりない。2. Description of the Related Art Conventionally, automatic pouring systems have been adopted in many casting factories such as automobile parts for the purpose of labor saving, rationalization and stabilization of quality, and various technical improvements have been made to pouring furnaces. There is. However, they are mostly for cast iron, and there are few examples of application to non-ferrous metals.
【０００３】[0003]
【発明が解決しようとする課題】一方、近時、水栓器具
などの増産要求から銅合金鋳物についても自動注湯設備
の導入意欲が高まっている。しかし、銅合金には鋳鉄に
はない性質があり、その自動注湯を実用化するためには
解決すべき種々の技術的課題が存在する。とりわけ、過
酷な使用条件に曝される注湯炉の注湯ノズル、あるいは
これを開閉するためのストッパの素材の選定には注意を
要する。この発明は、上記素材について試験を重ねた結
果得られたもので、自動注湯の長時間の繰り返し作業に
も十分に耐えられる注湯ノズル及び注湯ノズル開閉用ス
トッパを提供することを目的とするものである。On the other hand, recently, there is a growing desire to introduce automatic pouring equipment for copper alloy castings due to demand for increased production of faucet equipment and the like. However, the copper alloy has properties not found in cast iron, and there are various technical problems to be solved in order to put the automatic pouring into practical use. In particular, attention must be paid to the selection of the material for the pouring nozzle of the pouring furnace or the stopper for opening and closing the pouring nozzle, which is exposed to severe usage conditions. The present invention was obtained as a result of repeated tests on the above materials, and an object thereof is to provide a pouring nozzle and a pouring nozzle opening / closing stopper that can sufficiently withstand a long-time repeated operation of automatic pouring. To do.
【０００４】[0004]
【課題を解決するための手段】上記目的を達成するため
に、この発明の銅合金注湯炉の注湯ノズルは、Ｃを10〜
20重量％、Ａｌ2 Ｏ3 を70〜80重量％含む耐火物で構成
するものとする。また、上記注湯ノズルを開閉するこの
発明のストッパは、Ｃを30〜40重量％、ＳｉＣを35〜55
重量％含む耐火物で構成するものとする。In order to achieve the above object, the pouring nozzle of the copper alloy pouring furnace according to the present invention has C of 10 to 10%.
A refractory material containing 20% by weight and 70 to 80% by weight of Al 2 O 3 is used. Further, the stopper of the present invention for opening and closing the pouring nozzle is 30 to 40% by weight of C and 35 to 55% of SiC.
It shall be composed of refractory material containing wt%.
【０００５】[0005]
【作用】銅合金の注湯ノズル、あるいはその開閉用スト
ッパの素材には、下記のような特性が求められる。 (1) 約1200℃においても変質しない耐熱性 (2) 急冷、急加熱の繰り返しでもスポーリングを生じな
い耐熱衝撃性 (3) 溶湯及びスラグと接触しても減肉しない耐溶損性 (4) ストッパの開閉動作により磨耗しない耐磨耗性 (5) 溶湯及びスラグが付着しない耐濡れ性[Function] The following characteristics are required for the material of the copper alloy pouring nozzle or its opening / closing stopper. (1) Heat resistance that does not deteriorate even at about 1200 ° C (2) Thermal shock resistance that does not cause spalling even after repeated rapid cooling and rapid heating (3) Melting resistance that does not reduce the thickness even if it contacts molten metal or slag (4) Abrasion resistance that does not wear due to opening and closing of stopper (5) Wetting resistance that does not adhere to molten metal or slag
【０００６】ストッパは溶湯に浸漬しない部分が大気に
曝されるため非酸化物系の耐火物が適しており、特にコ
スト的にも入手が容易なＳｉＣが良い。その場合、発明
者らの試験によれば、Ｃ量が30重量％以下になると、溶
湯に浸漬する部位と大気に曝される部位との温度差及び
急冷、急加熱による熱衝撃特性の低下によりスポーリン
グの発生する確率が高くなる。また、Ｃ量が40重量％以
上になると、耐磨耗性の著しい低下により、短期間で注
湯ノズルとの接触面が荒れ、溶湯の漏れが発生する。結
果として、Ｃが30〜40重量％ 、ＳｉＣが35〜55重量％
のものが最適であった。Since the stopper is exposed to the atmosphere at the portion not immersed in the molten metal, a non-oxide refractory material is suitable, and SiC is particularly preferable because it is easily available in terms of cost. In that case, according to the tests by the inventors, when the C content is 30% by weight or less, the temperature difference between the portion immersed in the molten metal and the portion exposed to the atmosphere and the decrease in thermal shock characteristics due to rapid cooling and rapid heating are caused. The probability of spalling increases. Further, when the amount of C is 40% by weight or more, the wear resistance is remarkably deteriorated, and the contact surface with the pouring nozzle is roughened in a short period of time, causing leakage of the molten metal. As a result, C is 30-40% by weight, SiC is 35-55% by weight.
The one was the best.
【０００７】一方、注湯ノズルは炉体れんがに囲まれる
ため蓄熱があり、ストッパほど耐熱衝撃性は要求され
ず、かつ大気に曝される面積が少ないため、耐磨耗性の
良好なＡｌ2 Ｏ3 が適している。その場合、Ｃ量が10重
量％以下になるとスラグの付着が著しくなり、ノズル閉
塞が短時間で発生する。また、Ｃ量が20重量％以上にな
ると、ストッパとの接触面の荒れが著しくなり、短時間
で溶湯の漏れが発生する。結果として、Ｃが10〜20重量
％ 、Ａｌ2 Ｏ3 が70〜80重量％のものが最適であっ
た。On the other hand, pouring nozzle has heat accumulation because it is surrounded by the furnace bricks, the more stoppers thermal shock resistance is not required, and because less area exposed to the atmosphere, the wear resistance of good Al 2 O 3 is suitable. In that case, if the amount of C is 10% by weight or less, the slag is significantly attached and the nozzle is clogged in a short time. On the other hand, when the amount of C is 20% by weight or more, the contact surface with the stopper is significantly roughened and the molten metal leaks in a short time. As a result, C of 10 to 20 wt% and Al 2 O 3 of 70 to 80 wt% were optimum.
【０００８】[0008]
【実施例】図１はこの発明の注湯ノズル及びストッパの
試験を行った開閉式自動注湯炉の概略縦断面図である。
図において、炉体１は円筒状の溶湯貯留槽２と、これに
前後から連通する注湯口３及び受湯口４とからなってい
る。溶湯貯留槽２は図示の通り蓋体１ａにより密閉構造
となっており、給気口５からのガス圧で湯面が加圧され
るようになっている。また、注湯口３には注湯ノズル６
とこれを開閉する丸棒状のストッパ７とが設けられてい
る。炉体１の内部には図示しない溶解炉から受湯口４を
通して移された青銅（ＪＩＳ青銅鋳物ＢＣ−６）の溶湯
が貯留され、かつこの溶湯は図示しないインダクタによ
る熱により1200〜1230℃の温度に保持されている。EXAMPLE FIG. 1 is a schematic vertical sectional view of an open-close type automatic pouring furnace in which a pouring nozzle and a stopper of the present invention were tested.
In the figure, a furnace body 1 is composed of a cylindrical molten metal storage tank 2, and a pouring port 3 and a receiving port 4 which communicate with the molten metal storage tank 2 from the front and back. The molten metal storage tank 2 has a closed structure with a lid 1a as shown in the figure, and the molten metal surface is pressurized by the gas pressure from the air supply port 5. Further, the pouring nozzle 6 is provided in the pouring port 3.
And a round bar-shaped stopper 7 for opening and closing the stopper. The molten metal of bronze (JIS bronze casting BC-6) transferred from the melting furnace (not shown) through the hot water inlet 4 is stored inside the furnace body 1, and this molten metal is heated to a temperature of 1200 to 1230 ° C. by heat from an inductor (not shown). Held in.
【０００９】上記注湯炉により注湯を行うには、溶湯貯
留槽２の湯面を加圧して注湯口３の湯面を図示の通り一
定に保持しておき、注湯ノズル６の下側に図示しない鋳
型が送り込まれた時に、ストッパ７を一定時間上昇させ
る。これにより、注湯口３の溶湯が注湯ノズル６を通過
して鋳型に注入される。注湯を終了したら、ストッパ７
を下降させて溶湯流を停止させる。これらの動作の繰り
返しにより、青銅鋳物が自動的に鋳造される。試験で
は、以下に説明するような注湯ノズル６及びストッパ７
を作成し、これを図１の自動注湯炉に組み込んで、１日
１０時間、５日間の稼働で注湯を繰り返し、スラグ地金
の付着によるノズル閉塞、熱衝撃によるスポーリングな
どの発生を観測した。In order to perform pouring by the pouring furnace, the molten metal surface of the molten metal storage tank 2 is pressurized to hold the molten metal surface of the pouring port 3 constant as shown in the figure, and the lower side of the pouring nozzle 6 is filled. When a mold (not shown) is fed in, the stopper 7 is raised for a certain period of time. As a result, the molten metal in the pouring port 3 passes through the pouring nozzle 6 and is poured into the mold. After pouring, stop 7
To lower the flow of molten metal. By repeating these operations, the bronze casting is automatically cast. In the test, the pouring nozzle 6 and the stopper 7 as described below are used.
1 was built into the automatic pouring furnace shown in Fig. 1, and pouring was repeated for 10 hours a day for 5 days to prevent nozzle clogging due to slag metal adhesion and spalling due to thermal shock. Observed.
【００１０】ストッパ 表１に示すように５種類の配合の素材でストッパを作成
した。配合Ａの場合は、無余熱で溶湯に浸漬すると、ス
トッパ本体にクラックが発生して割れてしまった。これ
は、熱衝撃による割れである。配合Ｅの場合は、約１〜
２日で割れてしまったが、ストッパの鉱物組成を分析す
ると、α−クリストバル石（ｃｒｉｓｔｏｂａｌｉｔ
ｅ）が生成していた。この割れは、過熱冷却の繰り返し
により熱膨張率が０の溶融シリカがα−クリストバル石
になり、熱膨張特性が変化したことが原因と考えられ
る。配合Ｃの場合は、注湯ノズルと接触するストッパの
先端部分の磨耗溶損が激しく、２〜３日で湯漏れが発生
した。配合Ｄの場合は、湯面より上部の大気雰囲気の部
位が酸化劣化して２〜３日で破損した。配合Ｂの場合
は、５日間良好に使用できた。 Stopper As shown in Table 1, stoppers were made from materials of 5 kinds of composition. In the case of the compound A, when it was immersed in the molten metal with no residual heat, the stopper body was cracked and broken. This is cracking due to thermal shock. For formulation E, about 1
It cracked in 2 days, but when the mineral composition of the stopper was analyzed, α-cristobalite (cristobalit)
e) was produced. It is considered that this crack is caused by the fact that the fused silica having a coefficient of thermal expansion of 0 became α-cristobalite by repeated supercooling and the thermal expansion characteristics changed. In the case of the compound C, the wear and melt loss of the tip portion of the stopper that comes into contact with the pouring nozzle was severe, and the molten metal leaked in 2 to 3 days. In the case of formulation D, the part in the air atmosphere above the molten metal surface was oxidatively deteriorated and damaged in 2 to 3 days. In the case of formulation B, it could be used satisfactorily for 5 days.
【００１１】[0011]
【表１】 [Table 1]
【００１２】注湯ノズル 表２に示すような３種類の配合で注湯ノズルを作成し
た。配合Ｈの場合は、ストッパと接触する面が磨耗して
しまい、２〜３日で湯漏れが発生した。配合Ｆの場合
は、注湯ノズル内に地金及びスラグが付着し、それが成
長して１〜２日でノズル内径を狭め、正確な注湯量が確
保出来なくなった。配合Ｇの場合は、地金及びスラグの
付着も磨耗溶損も少なく、５日間良好に使用できた。[0012] creating the pouring nozzle in three different formulations as shown in pouring nozzle Table 2. In the case of blend H, the surface in contact with the stopper was worn, and hot water leakage occurred in 2 to 3 days. In the case of the compound F, the metal and slag adhered to the inside of the pouring nozzle, which grew and narrowed the inner diameter of the nozzle within 1 to 2 days, making it impossible to secure an accurate pouring amount. In the case of the compound G, there was little adhesion of metal and slag and wear and melt damage, and it was possible to use it favorably for 5 days.
【００１３】[0013]
【表２】 [Table 2]
【００１４】[0014]
【発明の効果】この発明によれば、従来、ほとんど実績
のない銅合金の自動注湯において、最も使用条件の過酷
な注湯口の寿命信頼性を向上させ、長期間にわたって製
品品質の安定化を図ることができる。According to the present invention, in automatic pouring of a copper alloy, which has hardly been used in the past, the life reliability of the pouring port, which is the most rigorous use condition, is improved and the product quality is stabilized for a long period of time. Can be planned.
【図１】この発明の注湯ノズル及びストッパの試験に使
用した自動注湯炉の縦断面図である。FIG. 1 is a vertical sectional view of an automatic pouring furnace used for a test of a pouring nozzle and a stopper of the present invention.
３ 注湯口 ６ 注湯ノズル ７ ストッパ 3 Pouring spout 6 Pouring nozzle 7 Stopper
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ０４Ｂ 35/103 Ｃ２２Ｃ 1/02 ５０３Ｂ 35/565 Ｃ０４Ｂ 35/10 Ｇ Ｃ２２Ｃ 1/02 ５０３ 35/56 １０１Ｙ (72)発明者 磯貝 正広 愛知県常滑市鯉江本町５丁目１番地 株 式会社イナックス内 (72)発明者 本林 秀治 愛知県常滑市鯉江本町５丁目１番地 株 式会社イナックス内 (72)発明者 小関 裕治 岐阜県瑞浪市日吉町801 (72)発明者 林 静男 神奈川県川崎市川崎区田辺新田１番１号 富士電機株式会社内 (72)発明者 金城 秋夫 神奈川県川崎市川崎区田辺新田１番１号 富士電機株式会社内 (56)参考文献 特開 平１−254371（ＪＰ，Ａ) 特開 昭63−313640（ＪＰ，Ａ) 特開 平１−312047（ＪＰ，Ａ) 特開 平３−193252（ＪＰ，Ａ) 特開 平３−257061（ＪＰ，Ａ) 特公 平３−52423（ＪＰ，Ｂ２)─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical display location C04B 35/103 C22C 1/02 503B 35/565 C04B 35/10 G C22C 1/02 503 35/56 101Y (72) Inventor Masahiro Isogai 5-1, Koiemotocho, Tokoname-shi, Aichi Prefecture, Inax Co., Ltd. (72) Inventor Shuji Motobayashi 5-1-1, Koiemotocho, Tokoname-shi, Aichi Co., Ltd., Inax (72) ) Inventor Yuji Ozeki 801 Hiyoshi-cho, Mizunami-shi, Gifu Prefecture (72) Inventor Shizuo Hayashi 1-1 Tanabe Nitta, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture Fuji Electric Co., Ltd. (72) Akio Kaneshiro Kawasaki-ku, Kawasaki City, Kanagawa Prefecture Shinden Tanabe No. 1 Fuji Electric Co., Ltd. (56) Reference JP-A-1-254371 (JP, A) JP-A-63-313640 (JP, A) JP-A 1-3120 47 (JP, A) JP-A-3-193252 (JP, A) JP-A-3-257061 (JP, A) JP-B-3-52423 (JP, B2)
Claims (2)
量％含む耐火物で構成したことを特徴とする銅合金注湯
炉の注湯ノズル。1. A pouring nozzle for a copper alloy pouring furnace comprising a refractory material containing 10 to 20% by weight of C and 70 to 80% by weight of Al 2 O 3 .
含む耐火物で構成したことを特徴とする銅合金注湯炉の
注湯ノズル開閉用ストッパ。 【請求項3 】請求項１記載の注湯ノズルと請求項２記載
の注湯ノズル開閉用ストッパとを備えたことを特徴とす
る銅合金注湯炉の注湯口装置。2. C: 30-40% by weight, SiC: 35-55% by weight
A stopper for opening and closing the pouring nozzle of a copper alloy pouring furnace, characterized by being composed of a refractory containing. 3. A pouring spout device for a copper alloy pouring furnace, comprising the pouring nozzle according to claim 1 and the stopper for opening and closing the pouring nozzle according to claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3348888A JP2676448B2 (en) | 1991-12-05 | 1991-12-05 | A pouring nozzle for a copper alloy pouring furnace, a stopper for opening and closing the pouring nozzle, and a pouring spout device using these |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3348888A JP2676448B2 (en) | 1991-12-05 | 1991-12-05 | A pouring nozzle for a copper alloy pouring furnace, a stopper for opening and closing the pouring nozzle, and a pouring spout device using these |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05154647A JPH05154647A (en) | 1993-06-22 |
| JP2676448B2 true JP2676448B2 (en) | 1997-11-17 |
Family
ID=18400065
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3348888A Expired - Lifetime JP2676448B2 (en) | 1991-12-05 | 1991-12-05 | A pouring nozzle for a copper alloy pouring furnace, a stopper for opening and closing the pouring nozzle, and a pouring spout device using these |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2676448B2 (en) |
-
1991
- 1991-12-05 JP JP3348888A patent/JP2676448B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05154647A (en) | 1993-06-22 |
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