JPH0426936B2 - - Google Patents
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- Publication number
- JPH0426936B2 JPH0426936B2 JP62125125A JP12512587A JPH0426936B2 JP H0426936 B2 JPH0426936 B2 JP H0426936B2 JP 62125125 A JP62125125 A JP 62125125A JP 12512587 A JP12512587 A JP 12512587A JP H0426936 B2 JPH0426936 B2 JP H0426936B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- furnace
- air
- valve
- controller
- 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.)
- Expired - Lifetime
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Description
【発明の詳細な説明】 （産業上の利用分野） この発明は、低圧鋳造機の昇圧装置に関する。[Detailed description of the invention] (Industrial application field) The present invention relates to a pressure boosting device for a low pressure casting machine.
（従来技術）
従来の低圧鋳造機の昇圧装置としては、例えば
第３図に示すようなものがある。(Prior Art) As a conventional pressure boosting device for a low pressure casting machine, there is one shown in FIG. 3, for example.
この昇圧装置は２段加圧式のもので、エア源２
１からの空気がフイルター２２、チエツク弁３
１、サージタンク３２、レギユレータ２３を通つ
て制御された流れの空気となり、さらに、その空
気がパイロツトレギユレータ２４ａとハイリリー
フレギユレータ２５ａで醸成された第１圧力空気
となり、さらに電磁弁２６ａによりエアパイロツ
ト式切換弁２７ａが作動されることによつて、前
記第１圧力空気が固定オリフイス２８を介して炉
３０内へ所定タイマーによる所定時間送り込まれ
ることによつて、第１加圧が完了する。この第１
加圧完了と同時に、前記レギユレータ２３からの
空気が、パイロツトレギユレータ２４ｂとハイリ
リーフレギユレータ２５ｂで醸成された第２圧力
空気となり、さらに、電磁弁２６ｂによりエアパ
イロツト式切換弁２７ｂが作動されることによつ
て、前記第２圧力空気が固定オリフイス２８を介
して炉３０内へ所定タイマーによる所定時間送り
込まれることによつて、第２加圧が完了する。 This pressure booster is a two-stage pressurization type, with two air sources
Air from 1 passes through filter 22 and check valve 3
1. A controlled flow of air passes through the surge tank 32 and the regulator 23, and this air becomes the first pressure air created by the pilot regulator 24a and the high-relief regulator 25a, and then the solenoid valve 26a. When the air pilot type switching valve 27a is operated, the first pressurized air is sent into the furnace 30 through the fixed orifice 28 for a predetermined time according to a predetermined timer, thereby completing the first pressurization. do. This first
Simultaneously with the completion of pressurization, the air from the regulator 23 becomes the second pressure air created by the pilot regulator 24b and the high relief regulator 25b, and furthermore, the air pilot type switching valve 27b is operated by the solenoid valve 26b. As a result, the second pressurized air is fed into the furnace 30 through the fixed orifice 28 for a predetermined time period according to a predetermined timer, thereby completing the second pressurization.
そして、炉３０内の製品凝固の冷却時間完了
後、電磁弁２６ｅによりシリンダバルブ２９が開
放作動されることにより、炉３０内の空気が大気
に放出され昇圧サイクルが完了する。 Then, after the cooling time for product solidification in the furnace 30 is completed, the cylinder valve 29 is opened by the solenoid valve 26e, whereby the air in the furnace 30 is released to the atmosphere and the pressure increase cycle is completed.
尚、切換弁２７ａと２７ｂは電磁弁２６ａと２
６ｂにより元に戻される。 Note that the switching valves 27a and 27b are the solenoid valves 26a and 2.
It is restored by 6b.
（発明が解決しようとする問題点）
しかしながら、このような従来の低圧鋳造機の
昇圧装置にあつては、製品鋳造に必要な炉３０内
の空気圧力、つまり炉内圧力をハイリリーフレギ
ユレータ２５ａ或いは２５ｂで醸成して炉３０内
に送るという「供給圧力管理の圧力制御方式」と
なつていたため、送られる空気の圧力と炉内圧力
との差が小さく、炉内への空気の充填性が悪い。
又、炉３０からの空気洩れ、管路抵抗等による圧
力降下の影響を受けやすく、第４図に示すよう
に、(1)設定圧力P1，P2に対して炉内圧力が追従
しない、(2)加圧途中の昇圧カーブの管理（炉内実
圧管理）が困難、(3)新製品開発時の鋳造方案の決
定が難しい等の問題点があつた。(Problems to be Solved by the Invention) However, in the pressure boosting device of such a conventional low-pressure casting machine, the air pressure in the furnace 30 required for product casting, that is, the furnace internal pressure, is controlled by a high-relief regulator. Since the system uses a "pressure control system for supply pressure management" in which the air is brewed in 25a or 25b and sent into the furnace 30, the difference between the pressure of the air sent and the pressure inside the furnace is small, and the filling of air into the furnace is easy. It's bad.
In addition, it is susceptible to pressure drop due to air leakage from the furnace 30, pipe resistance, etc., and as shown in Fig. 4, (1) the pressure inside the furnace does not follow the set pressures P 1 and P 2 ; There were problems such as (2) difficulty in managing the pressure increase curve during pressurization (actual pressure control in the furnace), and (3) difficulty in determining casting plans when developing new products.
（発明の目的）
この発明は、このような従来の問題点に着目し
てなされたもので、上記問題点を解決することを
目的としている。(Object of the Invention) The present invention has been made by paying attention to such conventional problems, and aims to solve the above problems.
（問題点を解決するための手段）
この発明は、低圧鋳造機の炉内にエア源から空
気を供給して炉内空気を昇圧するに際し、炉内空
気の実圧力を圧力伝送器を介してコントローラー
にフイードバツクし、そのコントローラーによ
り、予め設定された設定圧力と前記実圧力とを比
較演算するとともに、そのコントローラーの演算
結果に基づいて、前記炉内への空気の供給流量を
調整する調整弁と、炉内空気を排出する排気弁と
を制御するように構成し、前記排気弁を介し開度
が可変制御されるシリンダバルブを前記調整弁と
炉間の配管より分岐接続し、該シリンダバルブを
開閉作動させることのできる電磁弁を前記調整弁
と炉間の配管より分岐接続し、さらに、前記コン
トローラーからの指示を受けて設定圧力プログラ
ムと炉内の実圧力を記録表示できる記録計を設け
たことである。(Means for Solving the Problems) This invention provides a method for measuring the actual pressure of the furnace air through a pressure transmitter when supplying air from an air source to the furnace of a low-pressure casting machine to increase the pressure of the furnace air. a regulating valve that feeds back to a controller, uses the controller to compare and calculate a preset set pressure and the actual pressure, and adjusts the flow rate of air supplied into the furnace based on the calculation result of the controller; , an exhaust valve for discharging air in the furnace, and a cylinder valve whose opening degree is variably controlled via the exhaust valve is branch-connected from the piping between the adjustment valve and the furnace, and the cylinder valve is A solenoid valve that can be opened and closed is branch-connected from the piping between the regulating valve and the furnace, and a recorder that can record and display the set pressure program and the actual pressure in the furnace in response to instructions from the controller is provided. That's true.
（作用）
この発明によれば、炉内圧力に比べ高い圧力の
空気の供給が可能となり、炉からの空気洩れ、配
管の洩れ、管路抵抗による圧力降下等の影響を受
けず、設定圧力に対する炉内の実圧力の昇圧或い
は減圧の遅れ（追従性不良）を解決できるととも
に、圧力伝送器により常に炉内の実圧力の管理が
可能となり、又、コントローラーへの圧力プログ
ラムの設定変更も容易であるとともに、記録計と
の併用で新製品の鋳造方案決定にも役立てること
ができる。さらに排気弁によりシリンダバルブを
制御でき、シリンダバルブ及びこのバルブ開閉用
の電磁弁を調整弁と炉間の配管よりそれぞれ分岐
接続して配管構成を単純化でき、調整弁と排気弁
の連動を円滑化でき、プログラムの完了後には電
磁弁によりシリンダバルブを解放させて炉内空気
を急速に放出させることができる。(Function) According to this invention, it is possible to supply air at a higher pressure than the pressure inside the furnace, and it is not affected by air leakage from the furnace, leakage of piping, pressure drop due to pipe resistance, etc. In addition to solving the problem of delays in raising or lowering the actual pressure in the furnace (poor followability), the pressure transmitter makes it possible to constantly manage the actual pressure in the furnace, and it is easy to change the settings of the pressure program to the controller. In addition, when used in conjunction with a recorder, it can also be used to determine casting plans for new products. Furthermore, the cylinder valve can be controlled by the exhaust valve, and the cylinder valve and the solenoid valve for opening and closing this valve can be branched and connected from the piping between the regulating valve and the furnace, simplifying the piping configuration and smoothing the interlocking of the regulating valve and exhaust valve. After the program is completed, the cylinder valve can be opened by the solenoid valve to rapidly release the air in the furnace.
（実施例） 以下、本発明を図面に基づいて説明する。(Example) Hereinafter, the present invention will be explained based on the drawings.
第１図は、この発明の一実施例を示す図であ
る。 FIG. 1 is a diagram showing an embodiment of the present invention.
先ず、構成を説明すると、エア源１にはフイル
ター２、チエツク弁３、サージタンク４を介して
レギユレータ５が配管接続される。レギユレータ
５には制御ボツクス１０のコントローラー１４に
よつてその開度が可変制御される調整弁１１を介
して炉６が配管接続される。炉６にはバルブ７、
圧力伝送器１３を介して前記コントローラー１４
が配管接続される。尚、コントローラー１４には
記録計１５が接続される。 First, the configuration will be described. A regulator 5 is connected to an air source 1 via a filter 2, a check valve 3, and a surge tank 4. A furnace 6 is connected via piping to the regulator 5 via a regulating valve 11 whose opening degree is variably controlled by a controller 14 of a control box 10. The furnace 6 has a valve 7,
The controller 14 via the pressure transmitter 13
is connected to the piping. Note that a recorder 15 is connected to the controller 14.
又、調整弁１１と炉６との間の配管には、シリ
ンダバルブ９と電磁弁８がそれぞれ分岐配管され
る。シリンダバルブ９は電磁弁８により開閉作動
されるとともに、前記コントローラー１４により
制御される排気弁１２を介してその開度が可変制
御される。 Further, a cylinder valve 9 and a solenoid valve 8 are branched into the piping between the regulating valve 11 and the furnace 6, respectively. The cylinder valve 9 is opened and closed by a solenoid valve 8, and its opening degree is variably controlled via an exhaust valve 12 controlled by the controller 14.
次に作動を説明する。 Next, the operation will be explained.
エア源１からの空気がフイルター２、チエツク
弁３、サージタンク４、レギユレータ５を通して
制御された流れの空気となり、さらにその空気は
制御ボツクス１０内のコントローラー１４にて、
既に設定された圧力プログラム（設定圧力）に沿
つた指示を受けて、開度が調整された調整弁１１
を通して、比較的高い圧力として炉６内に送り込
まれる。これによつて、炉６内の空気の圧力（炉
内圧力）が上昇される。 Air from an air source 1 passes through a filter 2, a check valve 3, a surge tank 4, and a regulator 5 into a controlled flow of air, which is then controlled by a controller 14 in a control box 10.
A regulating valve 11 whose opening degree is adjusted in accordance with an instruction according to an already set pressure program (set pressure)
is fed into the furnace 6 under relatively high pressure. As a result, the pressure of the air within the furnace 6 (furnace pressure) is increased.
炉６内への空気の供給開始と同時に圧力伝送器
１３が作動して、炉内の実圧力が制御ボツクス１
０内のコントローラー１４にフイードバツクされ
る。 Simultaneously with the start of air supply into the furnace 6, the pressure transmitter 13 operates, and the actual pressure inside the furnace is transferred to the control box 1.
Feedback is sent to the controller 14 in 0.
コントローラー１４は、その設定圧力（設定圧
力プログラム）と、前記フイードバツクされた炉
内の実圧力とを比較演算し、その演算結果に基づ
いて炉内の実圧力が設定圧力より低い場合は、調
整弁１１の開度を大きくして、炉６内への空気流
量を増加させることによつて炉内圧力を高め、
又、それと逆に、炉内の実圧力が設定圧力より高
い場合は、排気弁１２の開度を大きくして、炉内
空気の大気への放出を図る。以上のようにして炉
内圧力が随時補正される。 The controller 14 compares and calculates the set pressure (set pressure program) with the actual pressure in the furnace that has been fed back, and if the actual pressure in the furnace is lower than the set pressure based on the calculation result, the controller 14 operates the regulating valve. 11 is increased to increase the air flow rate into the furnace 6, thereby increasing the pressure inside the furnace.
Conversely, if the actual pressure inside the furnace is higher than the set pressure, the opening degree of the exhaust valve 12 is increased to release the air inside the furnace to the atmosphere. In the above manner, the furnace pressure is corrected as needed.
コントローラー１４の設定プログラムの進行完
了後、電磁弁８によりシリンダバルブ９が開放作
動され、炉内空気が大気へ急速に放出される。 After the setting program of the controller 14 is completed, the cylinder valve 9 is opened by the solenoid valve 8, and the air in the furnace is rapidly released to the atmosphere.
尚、コントローラー１４は第２図に示すよう
に、シヨツト毎に炉３０内の溶湯の液面低下の補
正を前記設定圧力プログラムに加えて行ない、シ
ヨツト毎の炉内実圧力を自動的に補正する。 As shown in FIG. 2, the controller 14 corrects the drop in the liquid level of the molten metal in the furnace 30 for each shot in addition to the set pressure program, and automatically corrects the actual pressure in the furnace for each shot.
又、制御ボツクス１０の記録計１５は、コント
ローラー１４からの指示を受けて設定圧力プログ
ラムと炉内の実圧力を記録表示し、作業担当者に
加圧に係るデータを明示する。 Further, the recorder 15 of the control box 10 records and displays the set pressure program and the actual pressure in the furnace in response to instructions from the controller 14, and clearly shows data related to pressurization to the person in charge of the work.
（発明の効果）
以上、説明してきたように、この発明によれ
ば、低圧鋳造機の炉内にエア源から空気を供給し
て炉内空気を昇圧するに際し、炉内空気の実圧力
を圧力伝送器を介してコントローラーにフイード
バツクし、そのコントローラーにより、予め設定
された設定圧力と前記実圧力とを比較演算すると
ともに、そのコントローラーの演算結果に基づい
て、前記炉内への空気の供給流量を調整する調整
弁と、炉内空気を排出する排気弁とを制御するよ
うに構成し、前記排気弁を介し開度が可変制御さ
れるシリンダバルブを前記調整弁と炉間の配管よ
り分岐接続し、該シリンダバルブを開閉作動させ
ることのできる電磁弁を前記調整弁と炉間の配管
より分岐接続し、さらに、前記コントローラーか
らの指示を受けて設定圧力プログラムと炉内の実
圧力を記録表示できる記録計を設けたこととした
ため、炉内圧力に比べ高い圧力の空気の供給が可
能となり、炉からの空気洩れ、配管の洩れ、管路
抵抗による圧力降下等の影響を受けず、設定圧力
に対する炉内の実圧力の昇圧或いは減圧の遅れ
（追従性不良）を解決できるとともに、圧力伝送
器により常に炉内の実圧力の管理が可能となり、
又、コントローラーへの圧力プログラムの設定変
更も容易であるとともに、記録計との併用で新製
品の鋳造方案決定にも役立てることができる等の
効果が得られる。さらに排気弁によりシリンダバ
ルブを制御でき、シリンダバルブ及びこのバルブ
開閉用の電磁弁を調整弁と炉間の配管よりそれぞ
れ分岐接続して配管構成を単純化でき、調整弁と
排気弁の連動を円滑化でき、プログラムの完了後
には電磁弁によりシリンダバルブを解放させて炉
内空気を急速に放出させることができる。(Effects of the Invention) As described above, according to the present invention, when supplying air from an air source to the furnace of a low-pressure casting machine to increase the pressure of the furnace air, the actual pressure of the furnace air is Feedback is sent to the controller via a transmitter, and the controller calculates a comparison between a preset set pressure and the actual pressure, and also adjusts the flow rate of air supplied into the furnace based on the calculation results of the controller. The cylinder valve is configured to control a regulating valve to be adjusted and an exhaust valve for discharging air in the furnace, and a cylinder valve whose opening degree is variably controlled via the exhaust valve is branch-connected from a piping between the regulating valve and the furnace. A solenoid valve capable of opening and closing the cylinder valve is branch-connected from the piping between the regulating valve and the furnace, and is further capable of recording and displaying the set pressure program and the actual pressure in the furnace upon receiving instructions from the controller. By installing a recorder, it is possible to supply air at a higher pressure than the pressure inside the furnace, and it is not affected by air leaks from the furnace, pipe leaks, pressure drop due to pipe resistance, etc. In addition to solving the problem of delays in increasing or decreasing the actual pressure in the furnace (poor followability), the pressure transmitter makes it possible to constantly control the actual pressure in the furnace.
In addition, it is easy to change the pressure program settings for the controller, and when used in conjunction with a recorder, it can also be used to determine casting plans for new products. Furthermore, the cylinder valve can be controlled by the exhaust valve, and the cylinder valve and the solenoid valve for opening and closing this valve can be branched and connected from the piping between the regulating valve and the furnace, simplifying the piping configuration and smoothing the interlocking of the regulating valve and exhaust valve. After the program is completed, the cylinder valve can be opened by the solenoid valve to rapidly release the air in the furnace.
第１図はこの発明の低圧鋳造機の昇圧装置を示
す説明略体図、第２図はその設定圧力線図、第３
図は従来の低圧鋳造機の昇圧装置を示す説明略体
図、第４図はその設定圧力と炉内圧力を示す圧力
線図である。
１……エア源、６……炉、８……電磁弁、９…
…シリンダバルブ、１１……調整弁、１２……排
気弁、１３……圧力伝送器、１４……コントロー
ラー。
Fig. 1 is an explanatory schematic diagram showing the pressure boosting device of the low pressure casting machine of the present invention, Fig. 2 is its set pressure diagram, and Fig. 3
The figure is a schematic explanatory diagram showing a pressure boosting device of a conventional low-pressure casting machine, and FIG. 4 is a pressure diagram showing its set pressure and furnace pressure. 1... Air source, 6... Furnace, 8... Solenoid valve, 9...
... Cylinder valve, 11 ... Adjustment valve, 12 ... Exhaust valve, 13 ... Pressure transmitter, 14 ... Controller.
Claims (1)
て炉内空気を昇圧するに際し、炉内空気の実圧力
を圧力伝送器を介してコントローラーにフイード
バツクし、そのコントローラーにより、予め設定
された設定圧力と前記実圧力とを比較演算すると
ともに、そのコントローラーの演算結果に基づい
て、前記炉内への空気の供給流量を調整する調整
弁と、炉内空気を排出する排気弁とを制御するよ
うに構成し、前記排気弁を介し開度が可変制御さ
れるシリンダバルブを前記調整弁と炉間の配管よ
り分岐接続し、該シリンダバルブを開閉作動させ
ることのできる電磁弁を前記調整弁と炉間の配管
より分岐接続し、さらに、前記コントローラーか
らの指示を受けて設定圧力プログラムと炉内の実
圧力を記録表示できる記録計を設けたことを特徴
とする低圧鋳造機の昇圧装置。1 When supplying air from an air source into the furnace of a low-pressure casting machine to increase the pressure of the air in the furnace, the actual pressure of the air in the furnace is fed back to the controller via a pressure transmitter, and the controller controls the preset pressure. A comparison calculation is made between the set pressure and the actual pressure, and based on the calculation result of the controller, a regulating valve that adjusts the flow rate of air supplied into the furnace and an exhaust valve that discharges air from the furnace are controlled. A cylinder valve whose opening degree is variably controlled via the exhaust valve is branch-connected from a pipe between the regulating valve and the furnace, and a solenoid valve capable of opening and closing the cylinder valve is connected to the regulating valve. A pressure boosting device for a low-pressure casting machine, characterized in that a recorder is connected to a branch between the furnaces and can record and display the set pressure program and the actual pressure in the furnace upon receiving instructions from the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12512587A JPS63290674A (en) | 1987-05-21 | 1987-05-21 | Pressure raising device for low pressure casting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12512587A JPS63290674A (en) | 1987-05-21 | 1987-05-21 | Pressure raising device for low pressure casting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63290674A JPS63290674A (en) | 1988-11-28 |
| JPH0426936B2 true JPH0426936B2 (en) | 1992-05-08 |
Family
ID=14902466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12512587A Granted JPS63290674A (en) | 1987-05-21 | 1987-05-21 | Pressure raising device for low pressure casting machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63290674A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5339987B2 (en) * | 2009-03-27 | 2013-11-13 | 本田技研工業株式会社 | Casting machine control device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56141959A (en) * | 1980-04-08 | 1981-11-05 | Toyota Central Res & Dev Lab Inc | Casting pressure control device for low-pressure casting machine |
| JPS62248551A (en) * | 1986-04-19 | 1987-10-29 | Mazda Motor Corp | Hot water supply control device for low pressure casting |
-
1987
- 1987-05-21 JP JP12512587A patent/JPS63290674A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63290674A (en) | 1988-11-28 |
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