JPH01158320A - Molten metal detecting sensor in metal mold - Google Patents
Molten metal detecting sensor in metal moldInfo
- Publication number
- JPH01158320A JPH01158320A JP31613087A JP31613087A JPH01158320A JP H01158320 A JPH01158320 A JP H01158320A JP 31613087 A JP31613087 A JP 31613087A JP 31613087 A JP31613087 A JP 31613087A JP H01158320 A JPH01158320 A JP H01158320A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- mold
- sensor
- filling
- level
- 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 67
- 239000002184 metal Substances 0.000 title claims abstract description 67
- 239000000919 ceramic Substances 0.000 claims abstract description 18
- 238000005266 casting Methods 0.000 claims description 15
- 239000012811 non-conductive material Substances 0.000 claims 1
- 239000004020 conductor Substances 0.000 abstract description 15
- 238000001514 detection method Methods 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 7
- 238000009529 body temperature measurement Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、Ａ ｌ 、 Ｍ ｇ 、 Ｃｕ等非鉄金属あ
るいはその合金を鋳造する金型の溶湯充填感知センサに
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a sensor for detecting molten metal filling in a mold for casting nonferrous metals such as Al, Mg, Cu, or alloys thereof.
［従来の技術］ Ａｌ、Ｍｇ、（ｕ等非鉄金属あるいはその合金の。[Conventional technology] Non-ferrous metals such as Al, Mg, (U) or their alloys.
金型鋳造法、低圧鋳造法等において、鋳造時における金
型キャビティ内の溶湯充填レベルおよび充填完了を感知
することは、鋳造方案、鋳造条件を決定、制御する上で
極めて有効な手法である。In mold casting methods, low pressure casting methods, etc., sensing the filling level of molten metal in a mold cavity during casting and the completion of filling is an extremely effective method for determining and controlling casting plans and casting conditions.
充填レベル、充填完了を感知する従来技術として、金型
内に熱電対を設置し、溶湯が充填されたことによる金型
温度の上昇を感知する方法が用いられることがある。As a conventional technique for sensing the filling level and completion of filling, a method is sometimes used in which a thermocouple is installed in the mold to sense the rise in mold temperature due to filling with molten metal.
第３図は従来の充填感知センサの適用例を示す低圧鋳造
金型の側断面図であって、３は内壁内に溶湯４を注入さ
れ同溶湯４を冷却して製品を鋳造する金型、４は金属の
溶湯、１０，１１は金型３の外壁に非貫通状態に穿たれ
た第１．第２の測温孔、１２，１３はそれぞれ第１．第
２の測温孔１０．１１の底部に接触するように配置され
ている第１．第２の熱電対である。FIG. 3 is a side cross-sectional view of a low-pressure casting mold showing an example of application of a conventional filling detection sensor, in which 3 is a mold in which molten metal 4 is injected into the inner wall, and the molten metal 4 is cooled to cast a product; 4 is a molten metal; 10 and 11 are first holes drilled in the outer wall of the mold 3 in a non-penetrating state; The second temperature measuring holes, 12 and 13, are respectively the first. The first temperature measuring hole 10.11 is arranged so as to be in contact with the bottom of the second temperature measuring hole 10.11. This is the second thermocouple.
この従来の充填感知センサの適用例においては、金型３
の下部開口から同金型３内に溶湯４が充填されはじめて
、同溶湯４が第１の測温孔１０に対向するレベルに達す
ると、同溶湯４により金型３の測温孔１０部分が熱せら
れて、同測温孔１０に取付けられている第１の熱電対１
２に熱起電力が生成し、図示しない電気計測器によって
、前記熱起電力を読み取ることで測温孔１ｏのレベルに
溶湯４が到達したことを感知する。In this application example of the conventional filling sensing sensor, the mold 3
When the molten metal 4 begins to be filled into the mold 3 from the lower opening of the mold 3 and reaches a level facing the first temperature measurement hole 10, the temperature measurement hole 10 portion of the mold 3 is filled with the molten metal 4. The first thermocouple 1 is heated and attached to the temperature measurement hole 10.
A thermoelectromotive force is generated at 2, and by reading the thermoelectromotive force with an electric measuring device (not shown), it is sensed that the molten metal 4 has reached the level of the temperature measuring hole 1o.
上記と全く同様に、第２の測温孔１１に設置されている
第２の熱電対１３に接続された図示しない別の電気計測
器によって、溶湯４の充填が完了したことが感知される
。In exactly the same way as described above, completion of filling of the molten metal 4 is sensed by another electric measuring device (not shown) connected to the second thermocouple 13 installed in the second temperature measuring hole 11.
［解決しようとする問題点］
しかしながら、上述の熱電対を用い金型温度の上昇を感
知する方法では、
（１）溶湯４が熱電対１２，１３の設置レベルに達し金
型３の温度を上昇させ、同然電対１２，１３によって′
金型３の温度上昇を感知するまでに時間の遅れが生じ、
正確な溶湯４の充填時点を掴む事ができない。[Problems to be solved] However, in the method of sensing the rise in mold temperature using thermocouples described above, (1) the molten metal 4 reaches the installation level of the thermocouples 12 and 13 and increases the temperature of the mold 3; and by the same couple 12 and 13'
There is a time delay before the temperature rise in mold 3 is detected,
It is not possible to determine the exact time point at which the molten metal 4 is filled.
（２）また、熱電対１２．１３と金型３とが確実に接触
していることが計測の前提であるが、使用中に接触不良
が発生しやすく信頼性が低い。(2) Furthermore, although the premise of measurement is that the thermocouples 12 and 13 are in reliable contact with the mold 3, poor contact is likely to occur during use, resulting in low reliability.
本発明は、上記の問題点を解決しようとするもので、確
実に溶湯の充填を感知し、応答速度の速い金型内溶湯感
知センサを得ることを目的とする。The present invention is intended to solve the above-mentioned problems, and aims to provide an in-mold molten metal sensing sensor that reliably senses the filling of molten metal and has a fast response speed.
［問題点を解決するための手段］
本発明の金型内溶湯感知センサは、充填時に金属溶湯に
より浸漬される部位に底部を露出して設置され材質が導
電性セラミックスである導電端子と、同導電端子側面を
囲み同導電端子を前記金型と電気的に絶縁する材質が非
導電性セラミックスである絶縁筒を有することを特徴と
している。[Means for Solving the Problems] The sensor for detecting molten metal in a mold according to the present invention is the same as a conductive terminal made of conductive ceramics and installed with its bottom exposed in a region that is immersed in molten metal during filling. The present invention is characterized in that it has an insulating tube made of non-conductive ceramic, which surrounds the side surface of the conductive terminal and electrically insulates the conductive terminal from the mold.
［作用］
金型鋳造は溶湯充填工程が秒単位で完結する高速作業で
あり、その工程制御に使用するセンサはミリ秒単位のレ
スポンスが望まれる。この点から、従来の金型壁を介し
ての溶湯温度の検出に代わる。[Operation] Mold casting is a high-speed operation in which the molten metal filling process is completed in seconds, and the sensor used to control the process is desired to have a response in milliseconds. In this respect, it replaces the conventional sensing of the melt temperature via the mold wall.
より直接的な溶湯レベル検出法が希求されている。A more direct method of molten metal level detection is desired.
一方、近時のセラミックスの発展は著しく、導電性のあ
るものも、容易に入手できるようになっている。セラミ
ックスは溶融金属に対して熱的、化学的に耐性があるの
で、金属溶湯に直接接触させても、耐久性に問題は生じ
ないと予想される６本発明は、上記の諸条件を勘案して
なされたもので、溶湯に直接接触する導電端子を金型内
壁に設け、その端子と前記溶湯との電気的な導通の有無
によフて溶湯レベルを検出するものである。On the other hand, ceramics have made remarkable progress in recent years, and electrically conductive materials are now readily available. Since ceramics are thermally and chemically resistant to molten metal, it is expected that there will be no problem with durability even if they are brought into direct contact with molten metal.6 The present invention takes the above conditions into consideration. A conductive terminal that comes into direct contact with the molten metal is provided on the inner wall of the mold, and the molten metal level is detected based on the presence or absence of electrical continuity between the terminal and the molten metal.
また、その導電端子とそれを金型と絶縁する絶縁物とを
、金属溶湯で侵食されることなく耐久性のあるものとい
う観点から、いずれもその材質をセラミックスとしてい
る。Further, the conductive terminal and the insulator that insulates it from the mold are made of ceramic from the viewpoint of durability without being corroded by molten metal.
［実施例コ 以下、本発明の一実施例を図面により詳細に説明する。[Example code] Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.
第１図（ａ）、（ｂ）は一実施例としての金型内溶湯感
知センサの縦断面図である。なお、既述の符号は同一の
部分を示しており、説明は省略する。FIGS. 1(a) and 1(b) are longitudinal cross-sectional views of a sensor for detecting molten metal in a mold as an example. Note that the reference numerals already mentioned indicate the same parts, and the explanation will be omitted.
第１図（ａ）において、１は本発明のタイプ１センサで
あり、材質が導電性セラミックスである中心導体１ａ、
中心導体１ａの側面を囲み材質が絶縁性セラミックスで
ある絶縁筒１ｂで構成されている。また、３ａは金型３
の溶湯接触面（以下、内壁面ということがある）である
。In FIG. 1(a), 1 is a type 1 sensor of the present invention, with a central conductor 1a made of conductive ceramics,
An insulating tube 1b made of insulating ceramic surrounds the side surface of the center conductor 1a. Also, 3a is the mold 3
This is the molten metal contact surface (hereinafter sometimes referred to as the inner wall surface).
第１図（ｂ）において、２は本発明のタイプ２センサで
あり、材質が導電性セラミックスである中心導体２ａ、
中心導体２ａの側面を囲み材質が絶縁性セラミックスで
ある内側絶縁筒２ｂ、内側絶縁筒２ｂの側面を囲み材質
が導電性セラミックスである環状導体２ｃ、環状導体２
ｃの側面を囲み材質が絶縁性セラミックスである外側絶
縁筒２ｄで構成されている。In FIG. 1(b), 2 is a type 2 sensor of the present invention, with a central conductor 2a made of conductive ceramics,
An inner insulating tube 2b that surrounds the side surface of the central conductor 2a and is made of insulating ceramics, an annular conductor 2c that surrounds the side surface of the inner insulating tube 2b and is made of conductive ceramics, and an annular conductor 2
It is composed of an outer insulating cylinder 2d that surrounds the side surface of c and is made of insulating ceramics.
第２図は一実施例としての金型内溶湯感知センサの適用
例を示す低圧鋳造金型の側断面図であり。FIG. 2 is a side sectional view of a low-pressure casting mold showing an example of application of a sensor for detecting molten metal in the mold as an embodiment.
５は金型３に設置されたタイプ２センサ２．６゜７は第
１．第２のタイプ１センサ１．８，９は導通を感知し表
示する第１．第２の感知表示器である。5 is a type 2 sensor 2 installed on the mold 3. 7 is a type 2 sensor 2.6. The second type 1 sensor 1.8, 9 senses and indicates the continuity of the first type 1 sensor. A second sensing indicator.
本実施例の金型内溶湯感知センサはこのように構成され
ており１次にその動作を前記第２図で説明する。金型３
め側面に設置されたタイプ２センサ５は溶湯４が図示の
レベルに達すると、金型内壁面３ａに露出している中心
導体（第１図２ａ）と環状導体（第１図２ｃ）とが金属
溶湯４によって短絡され、第１の感知表示器８が作動し
溶湯４の充填レベルがセンサ５の位置に達したことを表
示する。次いで溶湯４のレベルが上昇しタイプ１センサ
２箇６，７の中心導体（第１図１ａ）に溶湯４が接触す
ると第２の感知表示器９が作動し充填が完了したことを
表示する。The in-mold molten metal detection sensor of this embodiment is constructed as described above, and its operation will be first explained with reference to FIG. 2. Mold 3
The type 2 sensor 5 installed on the side of the mold detects when the molten metal 4 reaches the level shown, the center conductor (Fig. 1 2a) and the annular conductor (Fig. 1 2c) exposed on the inner wall surface 3a of the mold are detected. A short circuit is caused by the molten metal 4 and the first sensing indicator 8 is actuated to indicate that the filling level of the molten metal 4 has reached the position of the sensor 5. Then, when the level of the molten metal 4 rises and the molten metal 4 comes into contact with the center conductors of the two type 1 sensors 6, 7 (FIG. 1a), the second sensing indicator 9 is activated to indicate that filling is complete.
このようにして、本実施例の金型内溶湯感知センサによ
り、信号の遅れなしに溶湯レベルないし溶湯充填の完了
を感知することができて、感知の誤作動も全くなく、セ
ンサ５〜７が溶湯４により侵食されることも殆どない。In this way, the molten metal detection sensor in the mold of this embodiment can detect the molten metal level or the completion of molten metal filling without signal delay, and there is no detection malfunction at all, and the sensors 5 to 7 It is hardly eroded by the molten metal 4.
［発明の効果］
本発明の金型内溶湯感知センサは、充填時に金属溶湯に
より浸漬される部位に底部を露出して設置され材質が導
電性セラミックスである導電端子と、同導電端子側面を
囲み同導電端子を前記金型と電気的に絶縁する材質が非
導電性セラミックスである絶縁筒を有しているので。[Effects of the Invention] The sensor for detecting molten metal in a mold according to the present invention includes a conductive terminal made of conductive ceramics and installed with its bottom exposed in a part that is immersed in molten metal during filling, and a conductive terminal that surrounds the side surface of the conductive terminal. This is because it has an insulating tube made of non-conductive ceramic to electrically insulate the conductive terminal from the mold.
（１）センサの材質がセラミックスであり、溶着がなく
長寿命で、保守が容易である。(1) The sensor is made of ceramic, has no welding, has a long life, and is easy to maintain.
（２）導電性、非導電性セラミックスの組合せにより、
金型との絶縁性を確保した上で溶湯の直接感知が行える
。(2) By combining conductive and non-conductive ceramics,
Molten metal can be directly sensed while ensuring insulation from the mold.
（３）直接感知を行う事により感知時間の遅れが零とな
り、また、熱電対と金型との接触不良によって生ずる感
知不能トラブルを解消する。(3) By performing direct sensing, the delay in sensing time is reduced to zero, and the problem of non-sensing caused by poor contact between the thermocouple and the mold is eliminated.
以上により、正確な充填レベル、充填完了を容易に知る
ことができて、例えば気孔の抑制、押湯の削減等、鋳造
方案、鋳造条件を設定、制御する上で極めて有効な手段
となり、鋳造品の生産性を向上させて、大きな経済的な
利益を得ることができる。As a result of the above, it is possible to easily know the exact filling level and completion of filling, and it becomes an extremely effective means for setting and controlling casting plans and casting conditions, such as suppressing pores and reducing the number of feeders. productivity can be improved and significant economic benefits can be obtained.
第１図（ａ）、（ｂ）は実施例としての金型内溶湯感知
センサの縦断面図、第２図は同実施例としての金型内溶
湯感知センサの適用例を示す低圧鋳造金型の側断面図、
第３図は従来の充填感知センサの適用例を示す低圧鋳造
金型の側断面図である。
１・・・・・・タイプｌセンサ、ｌａ、２ａ・・・・・
・中心導体、１ｂ・・・・・・絶縁筒、２・・・・・・
タイプ２センサ、２ｂ・・・・・・内側絶縁筒、２ｃ・
・・・・・環状導体、２ｄ・・・・・・外側絶縁筒、３
・・・・・・金型、３ａ・・・・・・溶湯接触面、４・
・・・・・溶湯、５・・・・・・タイプ２センサ、６，
７・・・・・・第１．第２のタイプ１センサ、８，９・
・・・・・第１゜第２の感知表示器。
特許出願人 株式会社 神戸製鋼所
代理人 弁理士 小 林 傅
第１図
第２図FIGS. 1(a) and (b) are vertical cross-sectional views of a sensor for detecting molten metal in a mold as an example, and FIG. 2 is a low-pressure casting mold showing an example of application of the sensor for detecting molten metal in a mold as an example. side sectional view of
FIG. 3 is a side sectional view of a low-pressure casting mold showing an example of application of a conventional filling detection sensor. 1... Type l sensor, la, 2a...
・Center conductor, 1b...Insulation tube, 2...
Type 2 sensor, 2b...Inner insulation cylinder, 2c...
......Annular conductor, 2d...Outer insulating tube, 3
...Mold, 3a... Molten metal contact surface, 4.
...Molten metal, 5...Type 2 sensor, 6,
7... 1st. Second type 1 sensor, 8,9・
... 1st and 2nd sensing indicators. Patent applicant: Kobe Steel, Ltd. Representative: Patent attorney Fu Kobayashi Figure 1 Figure 2
Claims (1)
する金型鋳造の、前記の溶湯の金型内への充填を感知す
る金型内溶湯感知センサにおいて、前記の充填時に金属
溶湯により浸漬される部位に底部を露出して設置され材
質が導電性セラミックスである導電端子と、同導電端子
側面を囲み同導電端子を前記金型と電気的に絶縁する材
質が非導電性セラミックスである絶縁筒を有することを
特徴とする金型内溶湯感知センサ。(1) In a mold casting sensor that detects the filling of the molten metal into the mold in mold casting in which a mold is filled with molten metal and cooled to produce a cast product, the molten metal sensor in the mold detects the filling of the molten metal into the mold. A conductive terminal made of conductive ceramic and installed with its bottom exposed in a part to be immersed in molten metal, and a non-conductive material surrounding the side surface of the conductive terminal and electrically insulating the conductive terminal from the mold. A sensor for detecting molten metal in a mold, characterized by having an insulating cylinder made of ceramics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31613087A JPH01158320A (en) | 1987-12-16 | 1987-12-16 | Molten metal detecting sensor in metal mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31613087A JPH01158320A (en) | 1987-12-16 | 1987-12-16 | Molten metal detecting sensor in metal mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01158320A true JPH01158320A (en) | 1989-06-21 |
Family
ID=18073585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31613087A Pending JPH01158320A (en) | 1987-12-16 | 1987-12-16 | Molten metal detecting sensor in metal mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01158320A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007506958A (en) * | 2003-09-27 | 2007-03-22 | フューチャー・テクノロジー（アール・アンド・ディー）・リミテッド | Sensor that electrostatically measures the distance to the target |
| CN103658600A (en) * | 2013-12-31 | 2014-03-26 | 苏州明志科技有限公司 | Pouring method and pouring device for low-pressure casting |
| EP1687107B2 (en) † | 2003-11-12 | 2014-08-13 | Hydromec S.r.l. | Apparatus for casting articles made of aluminum, aluminum alloys, light alloys and the like |
-
1987
- 1987-12-16 JP JP31613087A patent/JPH01158320A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007506958A (en) * | 2003-09-27 | 2007-03-22 | フューチャー・テクノロジー（アール・アンド・ディー）・リミテッド | Sensor that electrostatically measures the distance to the target |
| EP1687107B2 (en) † | 2003-11-12 | 2014-08-13 | Hydromec S.r.l. | Apparatus for casting articles made of aluminum, aluminum alloys, light alloys and the like |
| CN103658600A (en) * | 2013-12-31 | 2014-03-26 | 苏州明志科技有限公司 | Pouring method and pouring device for low-pressure casting |
| CN103658600B (en) * | 2013-12-31 | 2015-09-30 | 苏州明志科技有限公司 | A kind of pouring procedure of low pressure casting and apparatus for pouring |
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