JPH06154992A - Low pressure casting apparatus for mg alloy - Google Patents
Low pressure casting apparatus for mg alloyInfo
- Publication number
- JPH06154992A JPH06154992A JP30410792A JP30410792A JPH06154992A JP H06154992 A JPH06154992 A JP H06154992A JP 30410792 A JP30410792 A JP 30410792A JP 30410792 A JP30410792 A JP 30410792A JP H06154992 A JPH06154992 A JP H06154992A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- casting machine
- casting
- furnace
- holding furnace
- 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
- 238000005266 casting Methods 0.000 title claims abstract description 84
- 229910000861 Mg alloy Inorganic materials 0.000 title claims abstract description 25
- 239000002184 metal Substances 0.000 claims abstract description 68
- 238000002844 melting Methods 0.000 claims abstract description 40
- 230000008018 melting Effects 0.000 claims abstract description 40
- 238000004891 communication Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 6
- 239000012535 impurity Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 229910000883 Ti6Al4V Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はＭｇ合金溶湯の補給手段
を備えたＭｇ合金低圧鋳造装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a Mg alloy low-pressure casting apparatus having means for replenishing molten Mg alloy.
【０００２】[0002]
【従来の技術】従来のＭｇ合金低圧鋳造技術において
は、Ｍｇ合金を溶解し、精錬し、過熱微細化処理した
後、処理後のＭｇ合金溶湯を図４に示す低圧鋳造装置に
導入する。即ち、処理後のＭｇ合金溶湯をるつぼ２に装
入して鋳造機保持炉７内に設置する。この鋳造機保持炉
７には配管６ａを介してコンプレッサ４が接続されてお
り、この配管６ａには圧力調整開閉弁５が介装されてい
る。また、鋳造機保持炉７の内部の圧力は圧力計１７に
より検出されている。そして、圧力計１７の検出値はマ
イクロコンピュータ１５に入力され、マイクロコンピュ
ータ１５はこの圧力検出値が所定の設定値になるように
圧力調整開閉弁５の開度をフィードバック制御する。2. Description of the Related Art In the conventional Mg alloy low-pressure casting technique, the Mg alloy is melted, refined and subjected to superheat refining treatment, and then the treated Mg alloy melt is introduced into a low-pressure casting apparatus shown in FIG. That is, the treated molten Mg alloy is charged into the crucible 2 and installed in the casting machine holding furnace 7. A compressor 4 is connected to the casting machine holding furnace 7 via a pipe 6a, and a pressure adjusting on-off valve 5 is inserted in the pipe 6a. The pressure inside the casting machine holding furnace 7 is detected by the pressure gauge 17. Then, the detected value of the pressure gauge 17 is input to the microcomputer 15, and the microcomputer 15 feedback-controls the opening degree of the pressure adjusting on-off valve 5 so that the detected pressure value becomes a predetermined set value.
【０００３】金型１の底部にはストーク３が取付けられ
るようになっている。このストーク３は鋳造機保持炉７
内に挿入されて、その下部がるつぼ２内の溶湯中に浸漬
されるようになっている。A stalk 3 is attached to the bottom of the mold 1. This stalk 3 is a casting machine holding furnace 7
It is inserted into the inside of the crucible 2 and the lower part thereof is immersed in the molten metal inside the crucible 2.
【０００４】この従来の低圧鋳造装置においては、別装
置で、Ｍｇ合金を溶解し、精錬し、過熱微細化処理した
後、処理後の溶湯をるつぼ２に装入し、るつぼ２を鋳造
機保持炉７に設置する。次いで、圧力調整開閉弁５を開
にして、鋳造機保持炉７の内部を加圧する。そうする
と、るつぼ２内の溶湯はストーク３を介して上昇し、金
型１内に注入される。この溶湯は金型１内で凝固し、鋳
物が製造される。In this conventional low-pressure casting apparatus, the Mg alloy is melted, refined, and overheat-miniaturized by a separate apparatus, and the melt after the treatment is charged into the crucible 2 and the crucible 2 is held by the casting machine. Install in furnace 7. Next, the pressure control on-off valve 5 is opened to pressurize the inside of the casting machine holding furnace 7. Then, the molten metal in the crucible 2 rises through the stalk 3 and is poured into the mold 1. This molten metal is solidified in the mold 1 to produce a casting.
【０００５】その後、鋳造機保持炉７内の圧力を低下さ
せ、溶湯をストーク３の途中まで低下させて保持する。
次いで、金型１を分割して鋳物を取り出し、その後金型
１を閉じて再度鋳造機保持炉７内を加圧し、金型１内に
溶湯を注入する。After that, the pressure in the casting machine holding furnace 7 is lowered, and the molten metal is held halfway down the stalk 3.
Next, the mold 1 is divided and the casting is taken out, then the mold 1 is closed, the casting machine holding furnace 7 is pressurized again, and the molten metal is injected into the mold 1.
【０００６】そして、この鋳造工程を繰り返してるつぼ
２内の溶湯の鋳造を終了した後、るつぼ２を新しい溶湯
が入ったものと交換し、ストーク３を設置しなおして、
再度鋳造を開始する。After completing the casting of the molten metal in the crucible 2 by repeating this casting process, the crucible 2 is replaced with a new molten metal, and the stalk 3 is installed again.
Start casting again.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、従来の
低圧鋳造装置においては、鋳造機保持炉７内のるつぼ２
内の溶湯の鋳造を終了した場合には、るつぼ２を交換
し、ストーク３を再設置する必要があり、生産効率が悪
いという欠点がある。However, in the conventional low-pressure casting apparatus, the crucible 2 in the casting machine holding furnace 7 is used.
When the casting of the molten metal inside is completed, it is necessary to replace the crucible 2 and re-install the stalk 3, which has a drawback that production efficiency is poor.
【０００８】本発明はかかる問題点に鑑みてなされたも
のであって、るつぼを交換することなく溶湯を補給する
ことができ、生産性を著しく高めることができるＭｇ合
金低圧鋳造装置を提供することを目的とする。The present invention has been made in view of the above problems, and provides a low-pressure Mg alloy casting apparatus which can replenish the molten metal without replacing the crucible and can remarkably enhance the productivity. With the goal.
【０００９】[0009]
【課題を解決するための手段】本発明に係るＭｇ合金低
圧鋳造装置は、鋳造機保持炉と、この鋳造機保持炉の上
部に設けられ前記鋳造機保持炉内の溶湯がストークを介
して注入される鋳造機鋳型と、Ｍｇ合金の溶湯を溶解す
る溶解炉と、この溶解炉内の溶湯と前記鋳造機保持炉内
の溶湯とを連結する連通管と、前記鋳造機保持炉内の溶
湯及び前記溶解炉内の溶湯を相互に関連づけて加圧して
夫々前記鋳造機鋳型及び前記鋳造機保持炉に送給する加
圧手段とを有することを特徴とする。A low-pressure Mg alloy casting apparatus according to the present invention comprises a casting machine holding furnace, and a molten metal in the casting machine holding furnace, which is provided above the casting machine holding furnace, injected through a stalk. A casting machine mold to be used, a melting furnace for melting a molten Mg alloy, a communication pipe for connecting the molten metal in the melting furnace and the molten metal in the casting machine holding furnace, and the molten metal in the casting machine holding furnace and It has a pressurizing means for pressurizing the molten metal in the melting furnace in association with each other and feeding the molten metal to the casting machine mold and the casting machine holding furnace, respectively.
【００１０】[0010]
【作用】本発明においては、溶解炉内の圧力を鋳造機保
持炉内の圧力と関連づけて高めることにより、溶解炉内
の溶湯を鋳造機保持炉内に補給する。このため、るつぼ
を交換することなく、溶湯を補給して連続的に鋳造する
ことができる。このため、極めて生産性が高い。In the present invention, the molten metal in the melting furnace is supplied to the casting machine holding furnace by increasing the pressure in the melting furnace in association with the pressure in the casting machine holding furnace. Therefore, the molten metal can be replenished and continuously cast without replacing the crucible. Therefore, the productivity is extremely high.
【００１１】[0011]
【実施例】以下、本発明の実施例について添付の図面を
参照して説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.
【００１２】図１は本発明の実施例に係るＭｇ合金低圧
鋳造装置を示す。図１において、図４と同一物には同一
符号を付してその詳細な説明は省略する。鋳造機保持炉
７及びその上の金型１及びストーク３の構成は従来の低
圧鋳造装置と同一である。本実施例装置においては、鋳
造機保持炉７内のるつぼ２内の溶湯中に、連通管１３の
一端部が浸漬されている。そして、この連通管１３の他
端部は溶解炉１０内の溶湯中に浸漬されるようになって
いる。FIG. 1 shows a Mg alloy low pressure casting apparatus according to an embodiment of the present invention. In FIG. 1, the same parts as those in FIG. 4 are designated by the same reference numerals, and detailed description thereof will be omitted. The structures of the casting machine holding furnace 7, the mold 1 and the stalk 3 thereon are the same as those of the conventional low pressure casting apparatus. In the apparatus of this embodiment, one end of the communicating pipe 13 is immersed in the molten metal in the crucible 2 in the casting machine holding furnace 7. The other end of the communication pipe 13 is immersed in the molten metal in the melting furnace 10.
【００１３】この溶解炉１０内にはＭｇ合金の原料が気
密的に封入され、この溶解炉１０内の原料はヒータによ
り加熱されて溶解し、また溶湯はヒータにより加熱され
て保温されるようになっている。溶解炉１０の蓋には配
管１８の一端が挿通され、配管１８の他端はコンプレッ
サ１１に接続されている。これにより、溶解炉１０の内
部をコンプレッサ１１により加圧することができる。配
管１８には、圧力調整開閉弁１４が介装されており、マ
イクロコンピュータ１５は、この圧力調整開閉弁１４の
開度を調整して溶解炉１０内の圧力を調節する。また、
この溶解炉１０の内部と配管６ａにおける弁５の下流側
の位置とは配管１９により連結されている。The raw material of the Mg alloy is hermetically sealed in the melting furnace 10. The raw material in the melting furnace 10 is heated by a heater to melt, and the molten metal is heated by the heater to be kept warm. Has become. One end of a pipe 18 is inserted into the lid of the melting furnace 10, and the other end of the pipe 18 is connected to the compressor 11. Thereby, the inside of the melting furnace 10 can be pressurized by the compressor 11. A pressure adjusting on-off valve 14 is provided in the pipe 18, and the microcomputer 15 adjusts the pressure in the melting furnace 10 by adjusting the opening degree of the pressure adjusting on-off valve 14. Also,
The inside of the melting furnace 10 and the position of the pipe 6 a on the downstream side of the valve 5 are connected by a pipe 19.
【００１４】連結管１３には開閉弁１２が介装されてい
ると共に、溶解炉１０側にヒータ９、鋳造機保持炉７側
に冷却器８が設置されている。連通管１３は、少なくと
もこのヒータ９の配設部が、Ｔｉ−６Ａｌ−４Ｖ合金、
ＭｇＯ系又はＺｒＯ系のセラミックスを内周面にコーテ
ィングした鋼等のようにＦｅが溶出しにくい材料により
成形されていることが必要である。このヒータ９の配設
部は内部を通流する溶湯が高温になるため、連通管１３
の構成材料からＦｅ等の不純物が溶湯中に溶け込むこと
を防止する必要があるからである。他の部分は鋼製パイ
プ等により成形してもよい。An on-off valve 12 is provided in the connecting pipe 13, a heater 9 is installed on the melting furnace 10 side, and a cooler 8 is installed on the casting machine holding furnace 7 side. In the communication tube 13, at least the portion where the heater 9 is disposed has a Ti-6Al-4V alloy,
It is necessary that the inner peripheral surface of the MgO-based or ZrO-based ceramics be coated with a material such as steel that Fe is less likely to elute. Since the temperature of the molten metal flowing inside the heater 9 is high, the communication pipe 13
This is because it is necessary to prevent impurities such as Fe from being melted into the molten metal from the constituent materials. The other portion may be formed by a steel pipe or the like.
【００１５】ヒータ９としては、高周波誘導加熱コイル
等がある。また、冷却器８としては図２に示すように連
通管１３の外周面に接してパイプ８ａを螺旋状に巻回
し、パイプ８ａ内に常温の空気を通流させるように構成
したものがある。As the heater 9, there is a high frequency induction heating coil or the like. As the cooler 8, as shown in FIG. 2, there is one in which the pipe 8a is spirally wound in contact with the outer peripheral surface of the communication pipe 13 and the air at room temperature is passed through the pipe 8a.
【００１６】このように構成された低圧鋳造装置におい
ては、鋳造機保持炉７内に空のるつぼ２を載置し、その
上に金型１を設置する。そして、溶解炉１０内にＭｇ合
金の原料を装入し、加熱して溶解させる。次いで、開閉
弁１２，１４を開にし、コンプレッサ１１を駆動してＣ
Ｏ2ガス等のＭｇ合金溶湯と反応しないガスを溶解炉１
０内に送り込み、溶解炉１０内の溶湯を加圧して連通管
１３を介して溶湯をるつぼ２内に送給する。In the low-pressure casting apparatus configured as described above, the empty crucible 2 is placed in the casting machine holding furnace 7, and the mold 1 is placed thereon. Then, the raw material of the Mg alloy is charged into the melting furnace 10 and heated to melt. Next, the on-off valves 12 and 14 are opened, the compressor 11 is driven, and C
Gas that does not react with molten Mg alloy such as O 2 gas is used for melting furnace 1
0, the molten metal in the melting furnace 10 is pressurized, and the molten metal is fed into the crucible 2 via the communication pipe 13.
【００１７】次いで、鋳造機保持炉７内にコンプレッサ
４から圧縮ガスを送り込み、鋳造機保持炉７内を加圧す
る。この加圧パターンを図３に示す、図３は、横軸に時
間をとり、縦軸に常圧からの加圧圧力をとって鋳造機保
持炉７内の加圧の変化パターンの一例を示す。加圧開始
後Ａ秒間でＰ 1Kgf/cm2の圧力に加圧し、この圧力にＢ秒
間保持する。Next, a compressor is placed in the casting machine holding furnace 7.
Compressed gas is sent from 4 to pressurize the inside of the casting machine holding furnace 7.
It This pressurization pattern is shown in Fig. 3. In Fig. 3, the horizontal axis shows time.
The space between them is maintained, and the vertical axis shows the pressure from normal pressure,
An example of a change pattern of pressurization in the holding furnace 7 is shown. Start pressurization
P in A seconds after 1Kgf / cm2Pressurize to this pressure for B seconds
Hold for a while.
【００１８】これにより、るつぼ２内の溶湯はストーク
３内を上昇し、金型１の下方近傍に位置する。この保圧
の間に、金型１が閉じられ、その後Ｃ秒間で鋳造機保持
炉７内はＰ2Kgf/cm2の圧力に加圧される。これにより、
溶湯がストーク３を介して金型１内に注入され、凝固す
る。その後、保持炉７内を排気する。これにより、スト
ーク３内の溶湯がるつぼ２内に戻る。As a result, the molten metal in the crucible 2 rises in the stalk 3 and is located near the lower part of the die 1. During this holding pressure, the mold 1 is closed, and after that, the casting machine holding furnace 7 is pressurized to a pressure of P 2 Kgf / cm 2 in C seconds. This allows
The molten metal is poured into the mold 1 through the stalk 3 and solidifies. Then, the inside of the holding furnace 7 is exhausted. As a result, the molten metal in the stalk 3 returns to the crucible 2.
【００１９】次いで、鋳造機保持炉７内を再加圧し、Ｐ
1Kgf/cm2の圧力に保持する。この間に金型１を分割して
中の鋳物製品を取り出し、その後鋳型１を閉じる。Then, the inside of the casting machine holding furnace 7 is repressurized to P
Hold at a pressure of 1 Kgf / cm 2 . During this period, the mold 1 is divided to take out the casting product, and then the mold 1 is closed.
【００２０】その後、Ｐ2Kgf/cm2の圧力まで加圧し、溶
湯を金型１内に注入する。これらの工程を繰り返してる
つぼ２内の溶湯を金型１に複数回供給し、金型１により
複数個の鋳物製品を製造する。鋳造中、弁２０を開、弁
１４を閉にする。これにより、溶湯がるつぼ２から溶湯
炉１０に逆流することが防止される。これらの保持炉７
における圧力はマイクロコンピュータ１５により制御さ
れる。After that, the pressure is increased to P 2 Kgf / cm 2 and the molten metal is poured into the mold 1. By repeating these steps, the molten metal in the crucible 2 is supplied to the mold 1 a plurality of times to manufacture a plurality of casting products. During casting, valve 20 is open and valve 14 is closed. This prevents the molten metal from flowing back from the crucible 2 into the molten metal furnace 10. These holding furnace 7
The pressure at is controlled by the microcomputer 15.
【００２１】るつぼ２内の溶湯の残留量が少なくなった
場合には、鋳造を一時停止し、排気弁１７を開の状態に
する。その後、弁２０を閉、弁１４を開とし、コンプレ
ッサ１１により溶解炉１０内の圧力を高めて連通管１３
を介して溶解炉１０内の溶湯をるつぼ２内に送り、るつ
ぼ２内に溶湯を補給する。次いで、前述と同様にして、
金型１への鋳造を再開する。このようにして、るつぼ２
を動かすことなく、溶湯を補給することができる。When the residual amount of the molten metal in the crucible 2 becomes small, the casting is temporarily stopped and the exhaust valve 17 is opened. After that, the valve 20 is closed and the valve 14 is opened, the pressure in the melting furnace 10 is increased by the compressor 11, and the communication pipe 13 is opened.
The molten metal in the melting furnace 10 is fed into the crucible 2 via the above to supply the molten metal into the crucible 2. Then, as described above,
Restart casting to mold 1. In this way, crucible 2
The molten metal can be replenished without moving.
【００２２】又は、この溶湯の補給は以下のようにして
もよい。即ち、鋳造機保持炉７内の圧力を加圧工程から
減圧して常圧に戻す工程において、弁２０を閉としてマ
イクロコンピュータ１５により、その圧力以上の高い圧
力に溶解炉１０内の圧力を高める。これにより溶解炉１
０からるつぼ２内への溶湯の補給と、るつぼ２から金型
１への溶湯の鋳造とを同時に行う。Alternatively, the molten metal may be replenished as follows. That is, in the step of depressurizing the pressure in the casting machine holding furnace 7 from the pressurizing step and returning it to normal pressure, the valve 20 is closed and the microcomputer 15 increases the pressure in the melting furnace 10 to a pressure higher than that pressure. . As a result, melting furnace 1
Replenishment of the molten metal into the crucible 2 from 0 and casting of the molten metal from the crucible 2 to the die 1 are simultaneously performed.
【００２３】このようにして、るつぼ２から金型１に溶
湯を鋳造しつつ、るつぼ２内の溶湯を溶解炉１０から随
時補給して、連続的に鋳造することができる。In this way, the molten metal in the crucible 2 can be continuously replenished from the melting furnace 10 while the molten metal is cast from the crucible 2 to the mold 1.
【００２４】而して、この溶湯は、溶解炉１０からるつ
ぼ２まで連通管１３を通って供給される間に、過熱処理
される。即ち、Ｍｇ合金の溶湯は溶解炉１０内におい
て、約750℃以下に保持されている。そして、溶湯は連
通管１３を通流する間に、ヒータ９により約950℃の温
度に過熱する。その後、溶湯は冷却器８により冷却され
て再度約750℃の鋳込み温度に降温する。このように、
溶湯を950℃に過熱した後、鋳込み温度に冷却すること
により、得られる鋳物製品の結晶粒を微細化することが
できる。この場合に、このヒータ９の配設位置にて連通
管１３をＦｅ等の不純物が溶出しにくい材料（セラミッ
クス等）で成形する必要がある。しかし、従来は、この
過熱微細化処理を別に設けた溶解るつぼで行っていたた
め、Ｆｅの溶け込みを防止するためには、このるつぼ全
体をこのような不純物が溶出しにくい材料で成形する必
要がある。このため、微細化処理コストが高いものであ
ったが、本実施例のように少なくとも連通管の一部のみ
をこのような高価な材料で成形すればよいため、処理コ
ストが低下する。Thus, this molten metal is overheated while being supplied from the melting furnace 10 to the crucible 2 through the communication pipe 13. That is, the molten Mg alloy is kept in the melting furnace 10 at about 750 ° C. or lower. Then, the molten metal is overheated to a temperature of about 950 ° C. by the heater 9 while flowing through the communication pipe 13. After that, the molten metal is cooled by the cooler 8 and cooled again to the casting temperature of about 750 ° C. in this way,
By heating the molten metal to 950 ° C. and then cooling it to the casting temperature, the crystal grains of the obtained casting product can be made fine. In this case, it is necessary to form the communication pipe 13 at a position where the heater 9 is disposed by using a material (ceramics or the like) in which impurities such as Fe are difficult to elute. However, in the past, since this overheat refining treatment was carried out in a melting crucible provided separately, it is necessary to mold the entire crucible with a material in which such impurities are difficult to elute in order to prevent the infiltration of Fe. . For this reason, the miniaturization processing cost is high, but the processing cost is reduced because at least a part of the communication pipe may be molded with such an expensive material as in the present embodiment.
【００２５】また、従来の微細化処理には溶湯を一旦高
温に加熱する過熱処理及び溶湯にＣ2Ｃｌ4を投入するＣ
2Ｃｌ4処理等がある。しかしながら、過熱処理は、処理
後約２時間で効果が消失するため、長時間に亘って鋳造
する金型低圧鋳造に適用しにくい。一方、Ｃ2Ｃｌ4処理
は、溶湯中にＣｌが含有されるため、鋳物製品の腐食が
早まるので好ましくない。このため、従来Ｍｇ合金の金
型低圧鋳造は殆ど行われていない。従って、本発明によ
り始めて低コストで微細化処理した溶湯を金型に低圧鋳
造することが実用上可能となり、本発明はＭｇ合金鋳物
の品質向上に極めて有益である。Further, in the conventional refining treatment, a superheat treatment for temporarily heating the molten metal to a high temperature and a C for adding C 2 Cl 4 to the molten metal are carried out.
2 Cl 4 treatment, etc. However, since the effect of the overheat treatment disappears about 2 hours after the treatment, it is difficult to apply it to the die low pressure casting in which casting is performed for a long time. On the other hand, the C 2 Cl 4 treatment is not preferable, because Cl is contained in the molten metal and the corrosion of the casting product is accelerated. Therefore, the conventional low pressure die casting of Mg alloy has not been performed. Therefore, according to the present invention, it becomes practically possible to perform low-pressure casting of the molten metal which has been refined at low cost for the first time, and the present invention is extremely useful for improving the quality of the Mg alloy casting.
【００２６】なお、溶解炉１０内に防燃ガスを充填する
ことにより、溶湯炉１０内の溶湯が空気と接触しにくく
なり、溶湯の酸化が抑制される。この防燃ガスとして
は、ＣＯ2とＳＦ6との混合ガスがある。防燃ガスは、溶
湯表面に弗化物膜を作るので、ＣＯ2よりも防燃効果は
高い。しかし、防燃ガスはＣＯ2に較べて高価である。
このため、大量に使う加圧ガスにはＣＯ2を用い、保持
炉及び溶解炉内の防燃には、ＳＦ6＋ＣＯ2を用いること
が好ましい。By filling the melting furnace 10 with the flameproof gas, it becomes difficult for the molten metal in the melting furnace 10 to come into contact with air, and the oxidation of the molten metal is suppressed. As the flameproof gas, there is a mixed gas of CO 2 and SF 6 . Since the flameproof gas forms a fluoride film on the surface of the molten metal, it has a higher flameproof effect than CO 2 . However, the flame-retardant gas is more expensive than CO 2 .
Therefore, using a CO 2 for pressurized gas used in large quantities, the Bo燃the holding furnace and the melting furnace, it is preferable to use SF 6 + CO 2.
【００２７】[0027]
【発明の効果】本発明によれば、Ｍｇ合金の低圧鋳造に
おいて、るつぼ内に溶湯を溶解炉から連通管を介して補
給することができるから、るつぼ内の溶湯の鋳造が終了
しても、ストークを外してるつぼを交換するような作業
をすることなく溶湯を補給して連続的に鋳造することが
できる。このため、Ｍｇ合金鋳物を高生産性で低圧鋳造
することができる。また、連通管の途中に加熱部材及び
冷却部材を配置して溶湯補給時に過熱処理することによ
り、低コストで低圧鋳造材の過熱処理を行うことができ
る。According to the present invention, in the low pressure casting of Mg alloy, the molten metal can be replenished from the melting furnace into the crucible through the communicating pipe, so that even if the casting of the molten metal in the crucible is completed, The molten metal can be replenished and continuously cast without the work of removing the stalk and replacing the crucible. Therefore, the Mg alloy casting can be cast with high productivity and low pressure. Further, by arranging the heating member and the cooling member in the middle of the communication pipe and performing the superheat treatment at the time of supplying the molten metal, the superheat treatment of the low pressure cast material can be performed at low cost.
【図１】本発明の実施例に係る低圧鋳造装置を示す図で
ある。。FIG. 1 is a diagram showing a low pressure casting apparatus according to an embodiment of the present invention. .
【図２】本実施例の冷却器を示す外観図である。FIG. 2 is an external view showing a cooler of this embodiment.
【図３】本実施例の加圧パターンを示す模式図である。FIG. 3 is a schematic diagram showing a pressure pattern of this embodiment.
【図４】従来の低圧鋳造装置を示す図である。FIG. 4 is a view showing a conventional low pressure casting apparatus.
１；金型 ２；るつぼ ３；ストーク ４，１１；コンプレッサ ７；鋳造機保持炉 ８；冷却器 ９；溶解炉 １５；マイクロコンピュータ １６；真空容器 1; Mold 2; Crucible 3; Stoke 4, 11; Compressor 7; Casting Machine Holding Furnace 8; Cooler 9; Melting Furnace 15; Microcomputer 16; Vacuum Container
Claims (2)
部に設けられ前記鋳造機保持炉内の溶湯がストークを介
して注入される鋳造機鋳型と、Ｍｇ合金の溶湯を溶解す
る溶解炉と、この溶解炉内の溶湯と前記鋳造機保持炉内
の溶湯とを連結する連通管と、前記鋳造機保持炉内の溶
湯及び前記溶解炉内の溶湯を相互に関連づけて加圧して
夫々前記鋳造機鋳型及び前記鋳造機保持炉に送給する加
圧手段とを有することを特徴とするＭｇ合金低圧鋳造装
置。1. A casting machine holding furnace, a casting machine mold provided above the casting machine holding furnace, into which the molten metal in the casting machine holding furnace is injected via stalks, and melting for melting the molten Mg alloy. A furnace, a communication pipe connecting the molten metal in the melting furnace and the molten metal in the casting machine holding furnace, and the molten metal in the casting machine holding furnace and the molten metal in the melting furnace are associated with each other and pressurized respectively. An Mg alloy low-pressure casting apparatus comprising: the casting machine mold and a pressurizing means for feeding the casting machine holding furnace.
材、前記鋳造機保持炉側に冷却部材が配設されているこ
とを特徴とするＭｇ合金低圧鋳造装置。2. A low-pressure Mg alloy casting apparatus, wherein a heating member is arranged on the melting furnace side and a cooling member is arranged on the casting machine holding furnace side in the communicating pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30410792A JPH06154992A (en) | 1992-11-13 | 1992-11-13 | Low pressure casting apparatus for mg alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30410792A JPH06154992A (en) | 1992-11-13 | 1992-11-13 | Low pressure casting apparatus for mg alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06154992A true JPH06154992A (en) | 1994-06-03 |
Family
ID=17929119
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30410792A Pending JPH06154992A (en) | 1992-11-13 | 1992-11-13 | Low pressure casting apparatus for mg alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06154992A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1570930A1 (en) * | 2004-03-01 | 2005-09-07 | IDRA CASTING MACHINES S.p.A. | Casting apparatus where molten material is fed from a melting area to a holding area, particularly using a low-pressure apparatus |
| JP2008036653A (en) * | 2006-08-03 | 2008-02-21 | Ariake Serako Kk | Molten metal feeding device and feeding method therefor |
| KR101365967B1 (en) * | 2012-02-27 | 2014-02-21 | 한국마그네슘기술연구조합 | continuous casting apparatus for magnesium billet of upper draw out type |
| CN105772681A (en) * | 2016-05-17 | 2016-07-20 | 昆山六丰机械工业有限公司 | Casting equipment for automobile hubs |
| CN105880523A (en) * | 2016-05-17 | 2016-08-24 | 昆山六丰机械工业有限公司 | Automobile hub pouring system and pouring method |
| JP2016215252A (en) * | 2015-05-22 | 2016-12-22 | 助川電気工業株式会社 | Low pressure aluminum casting equipment |
| CN107952945A (en) * | 2017-12-26 | 2018-04-24 | 江苏凯特汽车部件有限公司 | Semi solid aluminum wheel hub rheology twin furnace apparatus for continuous formation |
| KR101868783B1 (en) * | 2017-03-27 | 2018-06-20 | 현대성우메탈 주식회사 | Continuous Casting Apparatus for High Reactivity Metal Wheel |
| KR101868784B1 (en) * | 2017-03-27 | 2018-07-23 | 현대성우메탈 주식회사 | Back Flow Prevention Valve Assembly of Continuous Casting Apparatus for High Reactivity Metal Wheel |
-
1992
- 1992-11-13 JP JP30410792A patent/JPH06154992A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1570930A1 (en) * | 2004-03-01 | 2005-09-07 | IDRA CASTING MACHINES S.p.A. | Casting apparatus where molten material is fed from a melting area to a holding area, particularly using a low-pressure apparatus |
| JP2008036653A (en) * | 2006-08-03 | 2008-02-21 | Ariake Serako Kk | Molten metal feeding device and feeding method therefor |
| JP4534057B2 (en) * | 2006-08-03 | 2010-09-01 | 有明セラコ株式会社 | Molten metal supply apparatus and supply method thereof |
| KR101365967B1 (en) * | 2012-02-27 | 2014-02-21 | 한국마그네슘기술연구조합 | continuous casting apparatus for magnesium billet of upper draw out type |
| JP2016215252A (en) * | 2015-05-22 | 2016-12-22 | 助川電気工業株式会社 | Low pressure aluminum casting equipment |
| CN105772681A (en) * | 2016-05-17 | 2016-07-20 | 昆山六丰机械工业有限公司 | Casting equipment for automobile hubs |
| CN105880523A (en) * | 2016-05-17 | 2016-08-24 | 昆山六丰机械工业有限公司 | Automobile hub pouring system and pouring method |
| KR101868783B1 (en) * | 2017-03-27 | 2018-06-20 | 현대성우메탈 주식회사 | Continuous Casting Apparatus for High Reactivity Metal Wheel |
| KR101868784B1 (en) * | 2017-03-27 | 2018-07-23 | 현대성우메탈 주식회사 | Back Flow Prevention Valve Assembly of Continuous Casting Apparatus for High Reactivity Metal Wheel |
| CN107952945A (en) * | 2017-12-26 | 2018-04-24 | 江苏凯特汽车部件有限公司 | Semi solid aluminum wheel hub rheology twin furnace apparatus for continuous formation |
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