JPH04367361A - Molten metal arrival sensor - Google Patents
Molten metal arrival sensorInfo
- Publication number
- JPH04367361A JPH04367361A JP16513291A JP16513291A JPH04367361A JP H04367361 A JPH04367361 A JP H04367361A JP 16513291 A JP16513291 A JP 16513291A JP 16513291 A JP16513291 A JP 16513291A JP H04367361 A JPH04367361 A JP H04367361A
- Authority
- JP
- Japan
- Prior art keywords
- sensor
- molten metal
- temp
- temperature
- hole
- 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
- 239000002184 metal Substances 0.000 title claims abstract description 32
- 238000001125 extrusion Methods 0.000 claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000005266 casting Methods 0.000 claims description 9
- 230000005855 radiation Effects 0.000 abstract description 5
- 238000013459 approach Methods 0.000 abstract description 3
- 230000003628 erosive effect Effects 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000009529 body temperature measurement Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000001465 metallisation Methods 0.000 description 1
- 239000006082 mold release agent Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】この発明は、ダイカストマシンな
ど加圧鋳造機の金型に給湯される溶湯の湯面を検出する
センサに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sensor for detecting the level of molten metal supplied to a mold of a pressure casting machine such as a die casting machine.
【０００２】0002
【従来の技術】従来の湯面検出センサの一例を図面を参
照して説明する。図４において、金型１にはシーズワイ
ヤを挿入する穴をキャビティ２まで穿設し、この穴に金
属チューブ３を嵌合させ、絶縁材４を介して電極５の先
端を溶湯６の湯面７に臨むように固定させ、キャビティ
２内の湯面７が電極５に接触して通電することによって
湯面を検出するようになっている。2. Description of the Related Art An example of a conventional hot water level detection sensor will be explained with reference to the drawings. In FIG. 4, a hole into which a sheath wire is inserted is drilled in a mold 1 up to a cavity 2, a metal tube 3 is fitted into this hole, and the tip of an electrode 5 is connected to the surface of a molten metal 6 through an insulating material 4. The hot water level 7 in the cavity 2 contacts the electrode 5 and is energized to detect the hot water level.
【０００３】0003
【発明が解決しようとする課題】このようなセンサであ
ると、電極５が直接に溶湯に浸漬されることから侵蝕さ
れ、また、溶湯の凝固膜がセンサに付着して連続使用に
は耐えられなかった。そのため、このような着湯センサ
は試鋳など研究段階で使用するセンサの域を出るもので
なく、製造装置に設け連続的に使用することは困難であ
った。[Problems to be Solved by the Invention] In such a sensor, the electrode 5 is eroded because it is directly immersed in the molten metal, and a coagulated film of the molten metal adheres to the sensor, making it difficult to withstand continuous use. There wasn't. Therefore, such a molten metal deposition sensor is no more than a sensor used at the research stage such as test casting, and it has been difficult to install it in a manufacturing device and use it continuously.
【０００４】この発明は、このような点に鑑みてなされ
たもので、連続運転される加圧鋳造機の金型に設けるこ
とが可能な着湯センサを提供することを目的とする。[0004] The present invention has been made in view of the above points, and an object of the present invention is to provide a molten metal adhesion sensor that can be installed in a mold of a pressurized casting machine that is continuously operated.
【０００５】[0005]
【課題を解決するための手段】この発明は、加圧鋳造機
に給湯される給湯の湯面位置を検出するセンサであって
、金型に嵌設した押出棒にその軸方向に温度センサを内
蔵する穴を穿設して、この穴の低面を上記押出棒のキャ
ビティ側端面に近設させて上記穴の底面温度を計測する
ように構成し、金型に給湯される溶湯の湯面が上記温度
センサ位置に近接して計測温度が急上昇することを検出
して湯面位置を検出するようにしたことを特徴とする着
湯センサである。[Means for Solving the Problems] The present invention is a sensor for detecting the level of hot water supplied to a pressure casting machine, in which a temperature sensor is attached to an extrusion rod fitted in a mold in the axial direction of the extrusion rod. A built-in hole is drilled, and the bottom surface of the hole is placed close to the end surface of the cavity side of the extrusion rod to measure the bottom temperature of the hole, and the surface of the molten metal fed into the mold is measured. The hot water arrival sensor is characterized in that the hot water level position is detected by detecting that the measured temperature suddenly increases near the temperature sensor position.
【０００６】[0006]
【作用】温度センサは押出棒内の穴に挿入されているの
で、溶湯に直接接触することがないので侵食されること
がなく、連続運転される加圧鋳造機の金型に設けること
が可能になる。[Operation] Since the temperature sensor is inserted into a hole in the extrusion rod, it does not come into direct contact with the molten metal, so it will not be eroded, and can be installed in the mold of a pressure casting machine that is continuously operated. become.
【０００７】[0007]
【実施例】以下、図面に基づいてこの発明の実施例を説
明する。図１は着湯センサの構成図であり、センサー部
分を断面図で示している。この例は電磁ポンプ給湯装置
における定量給湯制御の場合である。即ち、押出棒１４
は鋳造製品を金型１１から押出すための押出棒で、加圧
鋳造機には通常複数本設けられている。この押出棒１４
は押出板１３に取着されていて、図示しない油圧シリン
ダにより左右に前進，後退可能なように装着されている
。Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. FIG. 1 is a configuration diagram of a hot water arrival sensor, and shows the sensor portion in a sectional view. This example is a case of quantitative hot water supply control in an electromagnetic pump water heater. That is, the extrusion rod 14
1 is an extrusion rod for extruding the cast product from the mold 11, and a pressure casting machine is usually provided with a plurality of extrusion rods. This extrusion rod 14
is attached to the extrusion plate 13 so that it can be moved forward and backward from side to side by a hydraulic cylinder (not shown).
【０００８】上記押出棒１４の一つに温度センサ１５を
挿入する穴を穿設して、この穴の底面を押出棒１４の金
型１１のキャビティ１２に臨む端面に近接させ、この穴
の底面の温度を計測するように構成している。A hole into which the temperature sensor 15 is inserted is bored in one of the extrusion rods 14, and the bottom surface of this hole is brought close to the end surface of the extrusion rod 14 facing the cavity 12 of the mold 11. It is configured to measure the temperature of
【０００９】この温度センサ１５は高感度の熱電対であ
ってもよいし、放射温度センサとしてサーモファイバの
先端に光学系レンズを設けて穴の底面からの赤外線の放
射を集光する非接触式温度センサとしてもよい。放射温
度センサの場合は、サーモファイバ（光ファイバ）で押
出棒１４の穴から外部に引き出せばよい。The temperature sensor 15 may be a highly sensitive thermocouple, or it may be a non-contact type radiation temperature sensor in which an optical lens is provided at the tip of a thermo fiber to condense infrared radiation from the bottom of the hole. It may also be used as a temperature sensor. In the case of a radiation temperature sensor, it may be pulled out from the hole of the extrusion rod 14 using a thermo fiber (optical fiber).
【００１０】上記押出棒１４は断熱スリーブ１６を介し
て金型１１からの熱伝導を少なくし、金型１１の温度変
化を直接検出しないようにしている。なお、この断熱ス
リーブ１６は押出棒１４に被覆してもよい。The extrusion rod 14 reduces heat conduction from the mold 11 through the heat insulating sleeve 16, so that temperature changes in the mold 11 are not directly detected. Note that the extrusion rod 14 may be covered with this heat insulating sleeve 16.
【００１１】図２は、鋳造後において図示しない鋳造品
を金型１１から押出すために押出棒１４を矢印方向に前
進した状態を示している。このとき、金型１１から突き
出された押出棒１４は外気に露出して冷却され、離型剤
スプレーの噴霧によって冷却されて、図３に示す温度セ
ンサ計測温度変化曲線の初期状態の温度Ｔ１ に降下し
ている。FIG. 2 shows a state in which the extrusion rod 14 is advanced in the direction of the arrow in order to extrude a cast product (not shown) from the mold 11 after casting. At this time, the extrusion rod 14 protruded from the mold 11 is exposed to the outside air and cooled, and is cooled by the release agent spray to reach the initial state temperature T1 of the temperature change curve measured by the temperature sensor shown in FIG. It's descending.
【００１２】次に、図１に示すように、電磁ポンプ２２
の作動により溶湯保温炉２１から金型１１のキャビティ
１２内に溶湯１８が給湯されて湯面１７が温度センサ１
５に近接すると、図３のＡ点のように温度が急に上昇し
始め、Ｂ点を通過してピーク温度Ｃ点に達する。Next, as shown in FIG.
As a result of the operation, molten metal 18 is supplied from the molten metal insulating furnace 21 into the cavity 12 of the mold 11, and the molten metal surface 17 becomes the temperature sensor 1.
5, the temperature begins to rise suddenly as at point A in FIG. 3, passes through point B, and reaches the peak temperature at point C.
【００１３】Ｃ点付近では金型１１のキャビティ１２に
溶湯１８が溶湯保温炉２１から電磁ポンプ２２の作動で
供給され、キャビティ１２内に充填を完了した時点であ
る。そして、溶湯温度は急激に降下して鋳造品は凝固す
ることになる。Near point C, the molten metal 18 is supplied to the cavity 12 of the mold 11 from the molten metal insulating furnace 21 by the operation of the electromagnetic pump 22, and filling of the cavity 12 is completed. Then, the temperature of the molten metal drops rapidly and the cast product solidifies.
【００１４】Ｄ点は加圧鋳造が完了して型開きを行い、
押出棒１４を図２に示すように押出して、図示しない鋳
造品を金型１１より押出し、上記押出棒１４が外気に露
出して冷却されて温度が降下した点である。そして離型
剤スプレーの噴霧によりさらに冷却されて初期状態の温
度Ｔ１ に降下する。[0014] At point D, pressure casting is completed and the mold is opened.
This is the point at which the extrusion rod 14 is extruded as shown in FIG. 2, a not-shown cast product is extruded from the mold 11, and the extrusion rod 14 is exposed to the outside air and cooled to lower its temperature. Then, it is further cooled by spraying the mold release agent spray, and the temperature drops to the initial state temperature T1.
【００１５】上記押出棒１４を後退させても断熱スリー
ブ１６によって金型１１の温度を直接伝導しないように
なっているので、ほぼ初期状態の温度Ｔ１に保持される
。Even when the extrusion rod 14 is retracted, the heat insulating sleeve 16 prevents the temperature of the mold 11 from being directly conducted, so that the temperature is maintained at approximately the initial state T1.
【００１６】押出板１３に固定された温度センサ１５か
らの出力は、押出板１３外に引き出され、アンプ２３を
介して比較器２４に出力される。一方、この比較器２４
には温度設定器２５に設定した設定温度が入力され、上
記温度センサ１５の出力と比較され、この比較器２４の
信号は着湯信号発信器２６に出力される。そして、着湯
信号発信器２６の出力はインバータ２７を介して上記電
磁ポンプ２２に出力され、溶湯保温炉２１からの溶湯１
８の供給を制御するように構成されている。The output from the temperature sensor 15 fixed to the extrusion plate 13 is drawn out of the extrusion plate 13 and output to the comparator 24 via the amplifier 23. On the other hand, this comparator 24
The set temperature set in the temperature setting device 25 is inputted to the temperature setting device 25 and compared with the output of the temperature sensor 15, and the signal of the comparator 24 is outputted to the hot water arrival signal transmitter 26. Then, the output of the molten metal arrival signal transmitter 26 is outputted to the electromagnetic pump 22 via the inverter 27, and the molten metal 1 from the molten metal insulating furnace 21 is
It is configured to control the supply of 8.
【００１７】従って、給湯された溶湯１８の湯面１７の
位置が図１に示す状態に達すると、上記温度センサ１５
の温度計測値が急上昇し、設定器２５から設定した設定
温度Ｔ２ に達すると比較器２４で判別して着湯信号発
生器２５を発信する。Therefore, when the position of the molten metal surface 17 of the supplied molten metal 18 reaches the state shown in FIG.
When the temperature measurement value suddenly rises and reaches the set temperature T2 set by the setting device 25, the comparator 24 makes a determination and sends the hot water arrival signal generator 25.
【００１８】上記着湯信号を電磁ポンプ駆動電源のイン
バータ２６に入力し、上記電磁ポンプ２２からの溶湯の
圧送を停止して定量給湯を完了することができる。By inputting the hot water arrival signal to the inverter 26 of the electromagnetic pump driving power source, the pressure feeding of the molten metal from the electromagnetic pump 22 can be stopped, and the fixed amount hot water supply can be completed.
【００１９】[0019]
【発明の効果】以上説明したとおり、この発明の着湯セ
ンサは押出棒内の穴に温度センサが挿入され、この穴の
底面を押出棒のキャビティ側端面に近設させて温度を計
測するようにし、金型に給湯される溶湯の湯面が温度セ
ンサに近ずいて温度が急上昇することを検出して湯面位
置を検出するように間接的なセンサとなっているので、
センサは溶湯に侵食されることもなく、連続して使用可
能になる。また、温度センサは熱電対であっても放射温
度センサであってもよい。[Effects of the Invention] As explained above, in the hot water arrival sensor of the present invention, the temperature sensor is inserted into the hole in the extrusion rod, and the temperature is measured by placing the bottom of this hole close to the end surface of the cavity side of the extrusion rod. This is an indirect sensor that detects the temperature of the molten metal being supplied to the mold as it approaches the temperature sensor and the temperature rises rapidly.
The sensor is not eroded by molten metal and can be used continuously. Further, the temperature sensor may be a thermocouple or a radiation temperature sensor.
【図１】この発明の実施例の着湯センサの構成を示す断
面図、FIG. 1 is a sectional view showing the configuration of a hot water arrival sensor according to an embodiment of the present invention;
【図２】押出棒の作動状態を示す断面図、FIG. 2 is a cross-sectional view showing the operating state of the extrusion rod;
【図３】温度
センサの計測した温度変化を示すグラフ、[Figure 3] Graph showing temperature changes measured by a temperature sensor,
【図４】従来
の着湯センサの構成を示す断面図である。FIG. 4 is a sectional view showing the configuration of a conventional hot water arrival sensor.
１１ 金型 １２ キャビティ １４ 押出棒 １５ 温度センサ １７ 湯面 １８ 溶湯 11 Mold 12 Cavity 14 Extrusion rod 15 Temperature sensor 17 Hot water surface 18 Molten metal
Claims (1)
置を検出するセンサであって、金型に嵌設した押出棒に
その軸方向に温度センサを内蔵する穴を穿設して、この
穴の低面を上記押出棒のキャビティ側端面に近設させて
上記穴の底面温度を計測するように構成し、金型に給湯
される溶湯の湯面が上記温度センサ位置に近接して計測
温度が急上昇することを検出して湯面位置を検出するよ
うにしたことを特徴とする着湯センサ。[Claim 1] A sensor for detecting the level position of hot water supplied to a pressure casting machine, the sensor comprising a hole in which a temperature sensor is built in in the axial direction of an extrusion rod fitted in a mold. The bottom surface of the hole is arranged so that the bottom surface temperature of the hole is measured by placing the lower surface of the hole close to the end surface of the cavity side of the extrusion rod, and the surface of the molten metal supplied to the mold is close to the temperature sensor position. A hot water arrival sensor is characterized in that the hot water level position is detected by detecting a sudden rise in measured temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16513291A JPH04367361A (en) | 1991-06-11 | 1991-06-11 | Molten metal arrival sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16513291A JPH04367361A (en) | 1991-06-11 | 1991-06-11 | Molten metal arrival sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04367361A true JPH04367361A (en) | 1992-12-18 |
Family
ID=15806510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16513291A Pending JPH04367361A (en) | 1991-06-11 | 1991-06-11 | Molten metal arrival sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04367361A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100400201C (en) * | 2004-01-21 | 2008-07-09 | 雅马哈发动机株式会社 | Thermosensor for casting machine and casting machine |
| JP2010131659A (en) * | 2008-12-08 | 2010-06-17 | Ryobi Ltd | Casting mold and casting method |
-
1991
- 1991-06-11 JP JP16513291A patent/JPH04367361A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100400201C (en) * | 2004-01-21 | 2008-07-09 | 雅马哈发动机株式会社 | Thermosensor for casting machine and casting machine |
| JP2010131659A (en) * | 2008-12-08 | 2010-06-17 | Ryobi Ltd | Casting mold and casting method |
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