JPS63101062A - Cooling method for dies for low pressure casting - Google Patents
Cooling method for dies for low pressure castingInfo
- Publication number
- JPS63101062A JPS63101062A JP24796986A JP24796986A JPS63101062A JP S63101062 A JPS63101062 A JP S63101062A JP 24796986 A JP24796986 A JP 24796986A JP 24796986 A JP24796986 A JP 24796986A JP S63101062 A JPS63101062 A JP S63101062A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- molten metal
- lower molds
- water flow
- cavity
- 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.)
- Granted
Links
- 238000005266 casting Methods 0.000 title claims abstract description 24
- 238000001816 cooling Methods 0.000 title claims abstract description 16
- 229910052751 metal Inorganic materials 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000498 cooling water Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 5
- 230000000694 effects Effects 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は低圧鋳造に使用する金型の冷却方法に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a method for cooling a mold used in low pressure casting.
（従来の技術）
一般に低圧鋳造においては、金型への注湯は金型が所定
温度の時に行う必要があるが、鋳造工程を繰り返すと、
鋳造品を取り出した後でも金型温度が注湯時に必要な温
度より高い状態になる。したがって、鋳造サイクル時間
を短縮するには金型を強制冷却して早（注湯時に必要な
温度に下げる必要があり、そのため、鋳造工程中に金型
に空気あるいは水を通流させて金型を冷却することも試
みられているが、空冷方式では冷却効率が悪く、また、
水冷方式では冷却されすぎて鋳造品に引は巣等の鋳造欠
陥が生じるなどの問題があり、強制冷却は行われていな
いのが現状である。(Prior art) In general, in low-pressure casting, it is necessary to pour metal into the mold when the mold is at a predetermined temperature, but if the casting process is repeated,
Even after the casting is removed, the mold temperature remains higher than the temperature required during pouring. Therefore, in order to shorten the casting cycle time, it is necessary to forcefully cool the mold to quickly reduce the temperature to the required temperature during pouring. Attempts have also been made to cool the
In the water cooling method, there are problems such as excessive cooling, which causes casting defects such as cavities in the cast product, and currently forced cooling is not performed.
（発明の目的）
本発明は上記の事情に鑑みてなされたもので、鋳造品に
鋳造欠陥を生じさせることな（鋳造工程中にも金型を水
冷方式により冷却して鋳造サイクル時間を大幅に短縮し
得るようにした金型の冷却方法を提供することを目的と
する。(Objective of the Invention) The present invention has been made in view of the above circumstances, and is designed to prevent casting defects from occurring in cast products (during the casting process, the mold is cooled by a water-cooling system, thereby significantly reducing the casting cycle time). It is an object of the present invention to provide a method for cooling a mold that can be shortened.
（問題点を解決するための手段）
本発明における低圧鋳造用金型の冷却方法は、溶湯を収
容する密閉式保温炉の上に配設した開閉機構に上下金型
を取り付け該上下金型のキャビティに保温炉内の溶湯を
ストークを介して加圧充填しさらに上下金型内の溶湯を
加圧保持ｔｔ低圧鋳造に用いる金型の冷却方法であって
、前記下金型に前記上金型を重ね合わせてキャビティを
画成した後該キャビティ内に前記保温炉内の溶湯をスト
ークを介して加圧充填し、キャビティ内への溶湯充満完
了後直ちに前記上金型に小容量の冷却水を通流させ、上
金型への通水開始後適宜の時間経過した後前記下金型に
小容量の冷却水を通流させ、前記溶湯への加圧保持終了
時点と前記上金型の分離上昇開始時点との間の中間時点
で前記上・下金型への通水を中容量に切換え、前記上金
型を上昇させて鋳造品を取り出した後前記上・下金型へ
の通水を大容量に切換え、前記上下金型への小・中・大
容量の通水の途中で、上・下金型の温度が所定温度以下
になった時に通水を停止し、その温度が所定温度を越え
た時に通水を再び開始することを特徴とするものである
。(Means for Solving the Problems) In the method of cooling a low-pressure casting mold according to the present invention, the upper and lower molds are attached to an opening/closing mechanism disposed above a closed heat-insulating furnace that stores molten metal. A cooling method for a mold used for low-pressure casting, in which the molten metal in a heat-retaining furnace is pressurized and filled into a cavity via a stalk, and the molten metal in upper and lower molds is held under pressure. are overlapped to form a cavity, and then the molten metal in the heat insulating furnace is pressurized and filled into the cavity via the stalk, and immediately after the cavity is filled with the molten metal, a small volume of cooling water is poured into the upper mold. A small volume of cooling water is allowed to flow through the lower mold after an appropriate period of time has passed after the start of water flow to the upper mold, and when the pressure on the molten metal ends and the upper mold is separated. The water flow to the upper and lower molds is switched to a medium capacity at an intermediate point between the time when the rising starts, and after the upper mold is raised and the cast product is taken out, water is passed to the upper and lower molds. is switched to large capacity, and when the temperature of the upper and lower molds falls below a predetermined temperature while passing small, medium, and large volumes of water to the upper and lower molds, the water flow is stopped, and the water flow is stopped until the temperature reaches the predetermined temperature. It is characterized by restarting water flow when the temperature exceeds the temperature.
（実施例）
以下、本発明の一実施例について図面に基づき詳細に説
明する。冷却水源（１）には、ストレーナ（２）、減圧
弁（３）、導管（４）、電磁開閉弁（５）、流量制御弁
（６）および導管（７）を介して上金型（８）の冷却孔
（９）が連通接続されている。また、導管（４）は分岐
管（１０）、電磁開閉弁（１１）および流 “量制御
弁（１２）を介して導管（７）に連通接続されている。(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings. The cooling water source (1) is connected to the upper mold (8) via a strainer (2), a pressure reducing valve (3), a conduit (4), an electromagnetic on-off valve (5), a flow control valve (6) and a conduit (7). ) are connected in communication. Further, the conduit (4) is connected to the conduit (7) via a branch pipe (10), an electromagnetic on-off valve (11), and a flow control valve (12).
また、前記導管（４）は分岐管（１３）、電磁開閉弁（
１４） 、流量制御弁（１５）および導管（１６）を介
して下金型（１７）の冷却孔（１８）に連通接続されて
いる。Further, the conduit (4) includes a branch pipe (13), an electromagnetic on-off valve (
14) is connected to the cooling hole (18) of the lower mold (17) via a flow control valve (15) and a conduit (16).
さらに、分岐管（１３）は分岐管（１９） 、電磁開閉
弁（２０）および流量制御弁（２１）を介して導管（１
６）に連通接続されている。また、電磁開閉弁（５）
、（１１）、（１４）、（２０）はインタフェース（２
２）を介して計算機（２３）に電気的に接続されている
。また、上・下金型（８） （１７）には温度センサ（
２４） （２５）がそれぞれ取り付けられており、該温
度センサ（２４） （２５）はＡ／Ｄ変換器（２６）を
介して計算機（２３）に電気的に接続されている。なお
、上・下金型（８） （１７）は溶湯を収容する密閉式
保温炉（図示・せず）の上に配設した開閉機構（図示せ
ず）に取り付けられており、かつ互いに型合わせされた
時、キャビティ（２７）を画成するように構成されてい
る。また、計算機（２３）には、各種の鋳造品について
鋳造欠陥が生じないための上・下金型（８） （１７）
に係る温度一時間の関係曲線、すなわち目標パターンが
記憶されている。Further, the branch pipe (13) is connected to the conduit (1
6). In addition, the electromagnetic on-off valve (5)
, (11), (14), and (20) are the interface (2
2) is electrically connected to the computer (23). In addition, temperature sensors (
24) and (25) are respectively attached, and the temperature sensors (24) and (25) are electrically connected to the computer (23) via an A/D converter (26). The upper and lower molds (8) and (17) are attached to an opening/closing mechanism (not shown) installed on a closed heat insulating furnace (not shown) that accommodates the molten metal, and are connected to each other. When brought together, they are configured to define a cavity (27). The calculator (23) also includes upper and lower molds (8) (17) to prevent casting defects from occurring in various casting products.
A temperature-hour relationship curve, that is, a target pattern, is stored.
（発明の作用）
次にこのように構成された装置の作用について説明する
。予め、目標パターンを、計算機（２３）に記憶されて
いる目標パターンのうちキャビティ（２７）に対応する
目標パターンに設定する。また、流量制御弁（６）、（
１２）、（１５）、（２１）の開口度を調整して流量制
御弁（１２）、（２１）の開口度を流量制御弁（６）、
（１５）の開口度の２倍にするとともに、４個の電磁開
閉弁（５）、（１１）、（１４）、（２０）を開いた時
、４個の流量制御弁（６）、（１２）、（１５）、（２
１）を通った冷却水が、上・下金型（８） （１７）を
目標パターンに沿って冷却するに必要な大容量になるよ
うにしておく。(Operation of the invention) Next, the operation of the device configured as described above will be explained. The target pattern is set in advance to the target pattern corresponding to the cavity (27) among the target patterns stored in the computer (23). In addition, the flow control valve (6), (
12), (15), and (21) to adjust the opening degrees of the flow control valves (12) and (21) to the flow control valves (6),
(15) and when the four electromagnetic on-off valves (5), (11), (14), and (20) are opened, the four flow control valves (6), ( 12), (15), (2
The cooling water passing through 1) should have a large capacity necessary to cool the upper and lower molds (8) and (17) along the target pattern.
さらに、４個の電磁開閉弁（５）、（１１）、（１４）
、（２０）を全部門じてお（。この状態の下に、上・下
金型（８） （１７）をガスバーナ（図示せず）で加熱
して注湯に必要な温度にするとともに、図示しない開閉
機構を作動して上金型（８）を下金型（１７）に重ね合
わせてキャビティ（２７）を画成する。次いで、計算機
（２３）に注湯開始の記号を入力すると、図示しない保
温炉に圧縮空気が供給され、保持炉内の溶湯は上面を加
圧されることによりストーク（図示せず）を介してキャ
ビティ（２７）内への注入を開始される。溶湯がキャビ
ティ（２７）内に充満された時（この時点は別途実測に
より決定されて計算機（２３）のタイマに予めセットさ
れている）、まず、電磁開閉弁（５）が開かれて流量制
御弁（６）により制御された小容量の冷却水が導管（７
）を介して上金型（８）の冷却孔（９）に供給され、上
金型（８）を通流せしめられる。上金型（８）への冷却
水供給開始後所定時間経過した時（この時点も上金型（
８）の場合と同様に計算機（２３）のタイマに予めセッ
トされている）、電磁開閉弁（１４）が囲かれて流量制
御弁（１５）により制御された小容量の冷却水が導管（
１６）を介して下金型（１７）の冷却孔（１８）に供給
され、下金型（１７）を通流せしめられる。この小容量
の上・下金型（８） （１７）への通水は、キャビティ
（２７）内の溶湯が所定状態に凝固して保温炉から圧縮
空気が排出されるまで続けられ、その後は上金型（８）
が下金型（１７）から分離上昇される時点までの中間時
点まで続けられる。その中間時点まで時間が経過すると
、電磁開閉弁（５） （１４）が閉じられると同時に電
磁開閉弁（１１） （２０）が開かれて流量制御弁（１
２） （２１）で制御された中容量の冷却水が上・下金
型（８） （１７）にそれぞれ通流せしめられる。この
中容量の上・下金型（８） （１７）への通水は、キャ
ビティ（２７）内の溶湯がある程度凝固して上金型（８
）が下金型（１７）から分離上昇されるまで続けられる
。Furthermore, four electromagnetic on/off valves (5), (11), (14)
, (20) in all sections (. Under this condition, the upper and lower molds (8) and (17) are heated with a gas burner (not shown) to the temperature required for pouring, An opening/closing mechanism (not shown) is operated to overlap the upper mold (8) with the lower mold (17) to define a cavity (27).Next, when a symbol for starting pouring is input into the calculator (23), Compressed air is supplied to a heat retention furnace (not shown), and the upper surface of the molten metal in the holding furnace is pressurized, so that injection of the molten metal into the cavity (27) via a stalk (not shown) is started. (27) is filled (this point is determined separately by actual measurement and preset in the timer of the computer (23)), first, the electromagnetic on-off valve (5) is opened and the flow control valve (6) is filled. ) A small volume of cooling water controlled by the conduit (7
) is supplied to the cooling hole (9) of the upper mold (8) and allowed to flow through the upper mold (8). When a predetermined period of time has elapsed after the start of cooling water supply to the upper mold (8) (at this point, the upper mold (8)
8), the electromagnetic on-off valve (14) is surrounded and a small volume of cooling water controlled by the flow rate control valve (15) is passed through the conduit (
16) to the cooling holes (18) of the lower mold (17), and is allowed to flow through the lower mold (17). The water flow into the small capacity upper and lower molds (8) and (17) continues until the molten metal in the cavity (27) solidifies to a predetermined state and compressed air is discharged from the insulating furnace. Upper mold (8)
This continues until an intermediate point in time when the mold is separated from the lower mold (17) and raised. When time has elapsed to the intermediate point, the electromagnetic on-off valves (5) (14) are closed, and at the same time, the electromagnetic on-off valves (11) (20) are opened and the flow control valve (1) is opened.
2) The medium capacity cooling water controlled in (21) is made to flow through the upper and lower molds (8) and (17), respectively. The water is passed through the middle capacity upper and lower molds (8) (17) until the molten metal in the cavity (27) solidifies to some extent.
) is continued until it is separated and raised from the lower mold (17).
上金型（８）が下金型（１７）から分離上昇されるとと
もに鋳造品が取り出されると、電磁開閉弁（５）（１４
）が再び開かれて上下金型（８） （１７）には小・中
容量を合わせた大容量の冷却水が通流される。大容量の
通水径小容量の通水により微調整が行われる。保温炉か
ら圧縮空気を排出させた以後における以上のような上下
金型（８） （１７）への段階的な通水は、上・下金型
（８） （１７）の温度が予め設定された目標パターン
で示す温度より高い場合に行われ、低くなった時温度セ
ンサ（２４） （２５）からの送信によりその時点で一
時停止され、再び高くなったとき、再び行われ、このよ
うな通水が時々刻々繰り返される。この結果、上・下金
型（８） （１７）は冷却水により強制冷却されて、短
時間に注湯時に必要な温度に下げられる。When the upper mold (8) is separated and raised from the lower mold (17) and the cast product is taken out, the electromagnetic on-off valve (5) (14
) is opened again, and a large volume of cooling water, including small and medium volumes, flows through the upper and lower molds (8) and (17). Large-capacity water flow diameter Fine adjustment is performed by small-capacity water flow. After the compressed air is discharged from the heat retention furnace, water is passed in stages to the upper and lower molds (8) (17) as described above, so that the temperatures of the upper and lower molds (8) (17) are set in advance. It is performed when the temperature is higher than the target pattern indicated by the target pattern, and when it becomes low, it is paused at that point by the transmission from the temperature sensor (24) (25), and when it becomes high again, it is performed again. Water repeats from moment to moment. As a result, the upper and lower molds (8) and (17) are forcibly cooled by the cooling water, and the temperature is lowered to the temperature required for pouring the metal in a short time.
以上の方法を、外径１００ 閂、長さ３００ｍＭ、厚さ
１５ ｆｆｆｆ、のアルミニウム製円筒鋳造品の鋳造工
程に適用したところ、強制冷却を行わない従来方法では
４〜５分を要した鋳造サイクル時間を、本発明方法では
３分に短縮することができた。When the above method was applied to the casting process of an aluminum cylindrical casting product with an outer diameter of 100 mm, a length of 300 mm, and a thickness of 15 ffff, the casting cycle took 4 to 5 minutes using the conventional method without forced cooling. The time could be reduced to 3 minutes using the method of the present invention.
（発明の効果）
以上の説明からも明らかなように本発明は、上・下金型
（８） （１７）に溶湯を充填した直後に容量を小・中
・大の段階的に増大させて冷却水を通流させ上・下金型
（８） （１７）を目標パターンに沿って強制冷却する
ようにしたから、鋳造品に鋳造欠陥を生じさせることな
く、上・下金型（８） （Ｌ７）の温度を注湯時に必要
な温度に適確に下げることができるため、鋳造サイクル
を大幅に短縮することが可能になるなどの優れた効果を
奏する。(Effects of the Invention) As is clear from the above explanation, the present invention increases the capacity in stages from small to medium to large immediately after filling the upper and lower molds (8) and (17) with molten metal. Since the upper and lower molds (8) (17) are forced to cool down along the target pattern by flowing cooling water, the upper and lower molds (8) (17) can be cooled without causing any casting defects in the cast product. Since the temperature of (L7) can be accurately lowered to the temperature required during pouring, excellent effects such as the ability to significantly shorten the casting cycle are achieved.
図面は本発明を実施するための装置のブロック図である
。The drawing is a block diagram of an apparatus for implementing the invention.
Claims (1)
上下金型を取り付け該上下金型のキャビティに保温炉内
の溶湯をストークを介して加圧充填しさらに上下金型内
の溶湯を加圧保持する低圧鋳造に用いる金型の冷却方法
であって、前記下金型に前記上金型を重ね合わせてキャ
ビティを画成した後、該キャビティ内に前記保温炉内の
溶湯をストークを介して加圧充填し、キャビティ内への
溶湯充満完了後直ちに前記上金型に小容量の冷却水を通
流させ、上金型への通水開始後適宜の時間経過した後前
記下金型に小容量の冷却水を通流させ、前記溶湯への加
圧保持終了時点と前記上金型の分離上昇開始時点との間
の中間時点で前記上下金型への通水を中容量に切換え、
前記上金型を上昇させて鋳造品を取り出した後前記上・
下金型への通水を大容量に切換え、前記上下金型への小
・中・大容量の通水の途中で、上・下金型の温度が所定
温度以下になった時に通水を停止しその温度が所定温度
を越えた時に通水を再び開始することを特徴とする低圧
鋳造用金型の冷却方法。The upper and lower molds are attached to the opening/closing mechanism installed above the closed heat retention furnace that stores the molten metal, and the molten metal in the heat retention furnace is pressurized and filled into the cavities of the upper and lower molds through the stalk, and the molten metal in the upper and lower molds is then filled with pressure. A cooling method for a mold used in low-pressure casting in which the upper mold is overlapped with the lower mold to define a cavity, and then the molten metal in the heat retention furnace is stoked into the cavity. Immediately after filling the cavity with the molten metal, a small volume of cooling water is passed through the upper mold, and after an appropriate period of time has elapsed after the start of water flow into the upper mold, the lower mold is cooled. A small volume of cooling water is passed through the mold, and the water flow to the upper and lower molds is increased to a medium volume at an intermediate point between the end of pressurization of the molten metal and the start of separation and rise of the upper mold. switching,
After raising the upper mold and taking out the cast product,
The water flow to the lower mold is switched to large capacity, and water flow is stopped when the temperature of the upper and lower molds falls below a predetermined temperature during the small, medium, and large volume water flow to the upper and lower molds. A method for cooling a low-pressure casting mold, characterized by stopping water flow and restarting water flow when the temperature exceeds a predetermined temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24796986A JPS63101062A (en) | 1986-10-18 | 1986-10-18 | Cooling method for dies for low pressure casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24796986A JPS63101062A (en) | 1986-10-18 | 1986-10-18 | Cooling method for dies for low pressure casting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63101062A true JPS63101062A (en) | 1988-05-06 |
| JPH0523869B2 JPH0523869B2 (en) | 1993-04-06 |
Family
ID=17171246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24796986A Granted JPS63101062A (en) | 1986-10-18 | 1986-10-18 | Cooling method for dies for low pressure casting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63101062A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5411074A (en) * | 1992-10-23 | 1995-05-02 | Sintokogio Ltd. | Method of controlling temperature of metallic mold in permanent mold casting facility and apparatus therefor |
| JP2002178128A (en) * | 2000-12-08 | 2002-06-25 | Ahresty Corp | Casting system for die casting |
-
1986
- 1986-10-18 JP JP24796986A patent/JPS63101062A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5411074A (en) * | 1992-10-23 | 1995-05-02 | Sintokogio Ltd. | Method of controlling temperature of metallic mold in permanent mold casting facility and apparatus therefor |
| JP2002178128A (en) * | 2000-12-08 | 2002-06-25 | Ahresty Corp | Casting system for die casting |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0523869B2 (en) | 1993-04-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |