JPH03110060A - Method for casting molten metal - Google Patents
Method for casting molten metalInfo
- Publication number
- JPH03110060A JPH03110060A JP24798089A JP24798089A JPH03110060A JP H03110060 A JPH03110060 A JP H03110060A JP 24798089 A JP24798089 A JP 24798089A JP 24798089 A JP24798089 A JP 24798089A JP H03110060 A JPH03110060 A JP H03110060A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- sprue
- strainer
- iron plate
- sprue cup
- 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
Links
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 60
- 239000002184 metal Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims description 11
- 238000005266 casting Methods 0.000 title abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910052742 iron Inorganic materials 0.000 claims abstract description 19
- 238000005058 metal casting Methods 0.000 claims description 4
- 239000002893 slag Substances 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 4
- 239000000155 melt Substances 0.000 abstract description 3
- 230000003068 static effect Effects 0.000 abstract description 3
- 230000008018 melting Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 6
- 239000011819 refractory material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 206010022000 influenza Diseases 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、スラグや耐火材などの異物が鋳物製品内に入
り込んで発生する製品不良（インフルーシロン）やガス
に起因する製品不良を低減する溶湯の鋳込方法に関する
。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to a molten metal product that reduces product defects caused by foreign substances such as slag and refractory materials entering a cast product (influenza) and product defects caused by gas. Regarding the casting method.
従来の技術
鋳造で製品を製造する場合、１４００〜１５００℃程度
の高温になっている溶湯を鋳型内へ注湯するが、溶湯中
にあるスラグや溶湯を保持する取鍋から剥離した耐火材
などの異物が鋳物製品内に入って製品不良となるインフ
ルージョンが問題となっている。この問題を解決するた
め、従来の溶湯の鋳込方法ではセラミック製のストレー
ナが一般的に使用されている。これを第３図に基づいて
説明すると、ストレーナ６は上型１に形成された湯口４
の下端部に位置し、下型２の湯口底に形成したストレー
ナ受台で支持されている。そして、図示省略の取鍋から
湯口カップ３に注湯された溶湯は、湯口４に導かれてス
トレーナ６に流れ込み、該ストレーナ６でスラグや耐火
材などの異物が除去されて湯道５へ流入し、さらに湯道
５に導かれて鋳物製品部に到達するのである。When manufacturing products using conventional casting techniques, molten metal at a high temperature of about 1,400 to 1,500°C is poured into a mold, but slag in the molten metal and refractory material that has peeled off from the ladle that holds the molten metal occur. Influences have become a problem when foreign objects enter the casting product and cause product defects. To solve this problem, ceramic strainers are commonly used in conventional molten metal casting methods. To explain this based on FIG. 3, the strainer 6 is connected to the sprue 4 formed in the upper mold 1.
It is supported by a strainer pedestal formed at the bottom of the sprue of the lower mold 2. The molten metal poured into the sprue cup 3 from a ladle (not shown) is guided to the sprue 4 and flows into the strainer 6, where foreign matter such as slag and refractory material is removed and the molten metal flows into the runner 5. Then, it is further guided to the runner 5 and reaches the casting product section.
発明が解決しようとする課題
ところで、鋳造においては溶湯の流入する速さと量を適
正に保つことが非常に重要であり、理想としては清浄化
された溶湯をできるだけ静かに速く鋳込むべきである。Problems to be Solved by the Invention In casting, it is very important to maintain the proper flow rate and amount of molten metal, and ideally the cleaned molten metal should be poured as quietly and quickly as possible.
しかし、人手による注湯作業では作業者の技量に差があ
るため、溶湯の入り方が早くなったり遅くなったりして
渦流れの速度にばらつきを発生するのは避けられない状
況にある。このため、酸化されやすくなって溶湯にスラ
グが混入したり、あるいは溶湯内に発生するガスを原因
とするガス欠陥もでやすくなる不都合があつた。これら
の対策として、通常は鋳型を成形する型方案で溶湯の入
り方をコントロールしているが、十分な対策を実施する
ことは困難であった。However, in manual pouring work, there are differences in the skill of the workers, so it is unavoidable that the molten metal enters faster or slower, causing variations in the speed of the vortex flow. For this reason, there are disadvantages in that the metal is easily oxidized, resulting in slag being mixed into the molten metal, or gas defects caused by gas generated in the molten metal. As a countermeasure to these problems, the way the molten metal enters is usually controlled by the molding method used to form the mold, but it has been difficult to implement sufficient countermeasures.
課題を解決するための手段
本発明は、前述の課題を解決するもので、湯口の下端部
にストレーナを設置し、湯口カップに注湯された溶湯を
湯口から前記ストレーナに導いて異物の除去をしてから
湯道へ流入させる溶湯の鋳込み方法において、前記スト
レーナの上面に薄い鉄板を載置して前記湯口及び前記湯
口カップに一時的に溶湯をため、前記鉄板を溶かした溶
湯が前記ストレーナに流入しはじめてから連続して溶湯
を注ぐことを特徴とした溶湯の鋳込方法である。Means for Solving the Problems The present invention solves the above-mentioned problems by installing a strainer at the lower end of the sprue and guiding the molten metal poured into the sprue cup from the sprue to the strainer to remove foreign matter. In this method, a thin iron plate is placed on the upper surface of the strainer, the molten metal is temporarily stored in the sprue and the sprue cup, and the molten metal that has melted the iron plate flows into the strainer. This is a molten casting method characterized by pouring molten metal continuously from the time it starts flowing.
作用
面述の手段によれば、取鍋から湯口カップに注湯された
溶湯は鉄板にせきとめられて湯口及び湯口カップに一時
的にたまり、この間に比重の軽いスラグが上部へ浮上す
るため製品内に入りにくくなる。そして、鉄板が高温の
溶湯に溶けると、湯口及び湯口カップ内にたまっていた
溶湯はストレーナを通って湯道へ流入しはじめ、湯口カ
ップに連続して注湯することによって溶湯は常に湯口カ
ップにたまった状態に保持される。このため、湯道に流
入する溶湯はほぼ一定の静圧を受けた状態で流れ、乱流
にはならずに静かに速く流れて鋳型内の鋳物製品部に流
入する。According to the method described above, the molten metal poured from the ladle into the sprue cup is dammed up by the iron plate and temporarily accumulates in the sprue and sprue cup.During this time, slag with a light specific gravity floats to the top, causing problems inside the product. It becomes difficult to enter. When the iron plate melts into the hot molten metal, the molten metal that had accumulated in the sprue and sprue cup begins to flow into the runner through the strainer, and by continuously pouring into the sprue cup, the molten metal is always kept in the sprue cup. It is kept in an accumulated state. Therefore, the molten metal flowing into the runner flows under a substantially constant static pressure, and flows quietly and quickly without becoming turbulent, and flows into the cast product part in the mold.
実施例
本発明による溶湯の鋳込方法の一実施例を第１図及び第
２図に基づいて説明すると、上型ｌと下型２を重ね合わ
せた鋳型の溶湯注入部が示されており、上型１に設けら
れた湯口カップ３及び湯口４の下端部は製品部に溶湯を
導く湯道５と連通している。そして、湯口４と湯道５と
が連結された湯口下端部には、゛下型２の湯口底に形成
したストレーナ受台に支持させてストレーナ６を設け、
さらに、該ストレーナ６の湯口カップ３側、すなわちス
トレーナ６の上面には板厚が０．５ｕ程度の鉄板７を載
置しておく。なお、ストレーナ６としては１４００〜１
５００℃の高温に耐えられるＳｉＣなどのセラミック製
が一般的に使用され、また、鉄板７としては溶湯の主原
料であるスクラップ材をストレーナ６の形状に合わせて
切断したものを使用すればよい。Embodiment An embodiment of the molten metal casting method according to the present invention will be described with reference to FIGS. 1 and 2. The molten metal injection part of the mold is shown in which an upper mold 1 and a lower mold 2 are overlapped. The lower ends of the sprue cup 3 and sprue 4 provided on the upper mold 1 communicate with a runner 5 that leads the molten metal to the product section. At the lower end of the sprue where the sprue 4 and the runner 5 are connected, a strainer 6 is provided so as to be supported by a strainer pedestal formed at the bottom of the sprue of the lower mold 2.
Further, an iron plate 7 having a thickness of about 0.5 μ is placed on the sprue cup 3 side of the strainer 6, that is, on the upper surface of the strainer 6. In addition, the strainer 6 is 1400~1
A material made of ceramic such as SiC that can withstand high temperatures of 500° C. is generally used, and the iron plate 7 may be made by cutting scrap material, which is the main raw material for the molten metal, to match the shape of the strainer 6.
上述した構造の溶湯注入部とした鋳型を使用して鋳造製
品を鋳込むと、図示省略の取鍋から湯口カップ３に注湯
された溶湯は、湯口４を通って湯口下端部に設けられた
ストレーナ６から湯道５へ流れ込もうとする。しかし、
ストレーナ６の上面に載置された鉄板７が一時的な栓と
なって溶湯をせき止めるので、鉄板７が１４００〜１５
００℃の高温となっている溶湯に溶けるまで、注湯され
た溶湯は湯口カップ３及び湯口４に一時的にためられる
。When a cast product is cast using a mold with a molten metal injection part having the structure described above, the molten metal poured from a ladle (not shown) into the sprue cup 3 passes through the sprue 4 and is placed at the lower end of the sprue. It tries to flow from the strainer 6 to the runner 5. but,
Since the iron plate 7 placed on the top surface of the strainer 6 acts as a temporary plug and dams up the molten metal, the iron plate 7
The poured molten metal is temporarily stored in the sprue cup 3 and the sprue 4 until it melts into the molten metal, which is at a high temperature of 00°C.
この時、溶湯中にあるスラグは溶湯上りも比重が小さい
ために湯口４から湯口カップ３へ浮上し、湯道５や製品
内には入りにくくなる。そして、鉄板７が高温の溶湯に
溶かされて栓として機能しなくなると、湯口カップ３や
湯口４にためられていた溶湯はストレーナ６を通って湯
道５へ流入し、湯口カップ３では溶湯の液面が低下しは
じめる。At this time, since the slag in the molten metal has a low specific gravity even when the molten metal rises, it floats from the sprue 4 to the sprue cup 3, making it difficult to enter the runner 5 or the product. When the iron plate 7 is melted by the hot molten metal and no longer functions as a stopper, the molten metal stored in the sprue cup 3 and the sprue 4 flows into the runner 5 through the strainer 6, and the molten metal in the sprue cup 3 flows into the runner 5. The liquid level begins to drop.
さらに、この液面低下を確認してから取鍋より溶湯を連
続して湯口カップ３に注ぐことにより、湯口カップ３及
び湯口４の液面をほぼ一定に保持しながらの溶湯補給が
可能となる。このため、湯口カップ３が注湯された溶湯
はほぼ一定の静圧を受けてストレーナ６に流入し、該ス
トレーナ６ではスラグや取鍋から剥離した耐火材などの
異物が除去され、さらに湯道５に導かれて図示省略の製
品部へ流れていく。この時の溶湯は、乱流ではなく静か
に加圧された状態で製品部へ流れていくので、湯口４や
湯道５などの形状や寸法を調整することにより、溶湯に
適した所望の流入速度を注湯作業者の技量にかかわらず
比較的容易に実現でき、ガス発生による製品の欠陥防止
対策もやりやすくなる。なお、鉄板７の大きさ、形状及
び板厚は、鋳物製品の重量、ストレーナ６の形状などに
応じて変化するのは言うまでもなく、また、鉄板７は溶
湯の原料と同じであるため鋳物製品の品質に影響を与え
る事はない。Furthermore, by continuously pouring the molten metal from the ladle into the sprue cup 3 after confirming that the liquid level has dropped, it is possible to replenish the molten metal while keeping the liquid level in the sprue cup 3 and sprue 4 almost constant. . Therefore, the molten metal poured into the sprue cup 3 flows into the strainer 6 under almost constant static pressure, and the strainer 6 removes foreign substances such as slag and refractory material peeled off from the ladle. 5 and flow to the product department (not shown). At this time, the molten metal flows to the product section in a pressurized state, not in a turbulent flow, so by adjusting the shape and dimensions of the sprue 4, runner 5, etc., the desired inflow suitable for the molten metal can be achieved. It is relatively easy to achieve high speeds regardless of the skill of the pouring worker, and it is also easier to take measures to prevent product defects due to gas generation. It goes without saying that the size, shape, and thickness of the iron plate 7 will vary depending on the weight of the cast product, the shape of the strainer 6, etc., and since the iron plate 7 is the same as the raw material for the molten metal, it will vary depending on the weight of the cast product and the shape of the strainer 6. It does not affect quality.
発明の効果
前述の本発明によれば、ストレーナの上面に鉄板を載置
して溶湯を一時的に湯口及び湯口カップにためる工程が
追加され、この間に溶湯中のスラグは−Ｆ方へ浮上して
製品に入りにくくなる。しかも、浮上によってスラグが
少なくなった溶湯はさらにストレーナを通過してから湯
道へ流入するため、わずかに残ったスラグも他の異物と
共にストレーナで除去されてしまい、これらが製品に流
入する可能性は非常に小さくなる。さらに、注湯作業者
の技量に左右されることなく溶湯を速く静かに入れるこ
とが可能となるため、ガス発生に起因する製品不良も大
幅に低減することができる。このように、鋳物製品内に
異物が入り込んで発生するインフルージョンを大幅に低
減できるといった効果があるにもかかわらず、大がかり
な装置や高価な材料は不要であり、不良品発生率の低下
がほぼそのまま製品コストの低下となるため、経済的な
面での効果も大きい。Effects of the Invention According to the present invention described above, a step is added in which an iron plate is placed on the top surface of the strainer to temporarily store the molten metal in the sprue and sprue cup, and during this time, the slag in the molten metal floats toward -F. This makes it difficult to get into the product. Moreover, since the molten metal with less slag due to flotation passes through a strainer before flowing into the runner, the slight remaining slag will be removed by the strainer along with other foreign matter, and there is a possibility that these will flow into the product. becomes very small. Furthermore, since the molten metal can be poured quickly and quietly without depending on the skill of the pouring operator, product defects caused by gas generation can be significantly reduced. In this way, although it has the effect of greatly reducing the incidence of infiltration caused by foreign matter entering the casting product, it does not require large-scale equipment or expensive materials, and the rate of defective products is almost completely reduced. It also has a great economic effect as it directly reduces the product cost.
第１図は本発明の一実施例を示す鋳型の溶湯性入部の断
面図、第２図は第１図の■−■線に沿う断面図、第３図
は従来例を示す鋳型の溶湯注へ部の断面図である。
■・・上型、２・・下型、３・・湯口カップ、４・・湯
口、５・・湯道、６・・ストレーナ、７・・鉄板。Fig. 1 is a sectional view of the molten metal inlet of a mold showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the line It is a sectional view of the hem part. ■...Upper mold, 2..Lower mold, 3.. Sprue cup, 4.. Sprue, 5.. Runway, 6.. Strainer, 7.. Iron plate.
Claims (1)
された溶湯を湯口から前記ストレーナに導いて異物の除
去をしてから湯道へ流入させる溶湯の鋳込み方法におい
て、前記ストレーナの上面に薄い鉄板を載置して前記湯
口及び前記湯口カップに一時的に溶湯をため、前記鉄板
を溶かした溶湯が前記ストレーナに流入しはじめてから
連続して溶湯を注ぐことを特徴とした溶湯の鋳込方法。A molten metal casting method in which a strainer is installed at the lower end of the sprue, and the molten metal poured into the sprue cup is guided from the sprue to the strainer to remove foreign matter before flowing into the runner. A molten metal casting method characterized by placing an iron plate to temporarily store molten metal in the sprue and the sprue cup, and pouring the molten metal continuously after the molten metal from the iron plate begins to flow into the strainer. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24798089A JPH03110060A (en) | 1989-09-26 | 1989-09-26 | Method for casting molten metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24798089A JPH03110060A (en) | 1989-09-26 | 1989-09-26 | Method for casting molten metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03110060A true JPH03110060A (en) | 1991-05-10 |
Family
ID=17171409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24798089A Pending JPH03110060A (en) | 1989-09-26 | 1989-09-26 | Method for casting molten metal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03110060A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0523835A (en) * | 1991-07-18 | 1993-02-02 | Mitsubishi Motors Corp | Method for casting casting product |
| US5503214A (en) * | 1994-04-04 | 1996-04-02 | Cmi International, Inc. | Mold and method for casting a disk brake rotor |
-
1989
- 1989-09-26 JP JP24798089A patent/JPH03110060A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0523835A (en) * | 1991-07-18 | 1993-02-02 | Mitsubishi Motors Corp | Method for casting casting product |
| US5503214A (en) * | 1994-04-04 | 1996-04-02 | Cmi International, Inc. | Mold and method for casting a disk brake rotor |
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