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JPH0683889B2 - Low pressure casting equipment - Google Patents

Low pressure casting equipment

Info

Publication number
JPH0683889B2
JPH0683889B2 JP60171388A JP17138885A JPH0683889B2 JP H0683889 B2 JPH0683889 B2 JP H0683889B2 JP 60171388 A JP60171388 A JP 60171388A JP 17138885 A JP17138885 A JP 17138885A JP H0683889 B2 JPH0683889 B2 JP H0683889B2
Authority
JP
Japan
Prior art keywords
pressure
molten metal
holding furnace
stalk
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.)
Expired - Fee Related
Application number
JP60171388A
Other languages
Japanese (ja)
Other versions
JPS6233052A (en
Inventor
真一 近藤
理 西田
哲司 松井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sintokogio Ltd
Original Assignee
Sintokogio Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sintokogio Ltd filed Critical Sintokogio Ltd
Priority to JP60171388A priority Critical patent/JPH0683889B2/en
Publication of JPS6233052A publication Critical patent/JPS6233052A/en
Publication of JPH0683889B2 publication Critical patent/JPH0683889B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、溶湯面に空気圧をかけて溶湯をストークを介
し上昇させ金型に充填させる低圧鋳造装置に関する。
Description: TECHNICAL FIELD The present invention relates to a low-pressure casting apparatus that applies air pressure to a molten metal surface to raise the molten metal via a stalk and fill the mold.

(従来の技術) 近年、低圧鋳造装置は溶湯面にかける空気圧をマイクロ
コンピュータでコントロールするようになってきてお
り、そのため、保持炉内には溶湯を所定レベルまで正確
に供給する必要がある。しかしながら、従来、保持炉へ
の溶湯の供給は、一般に作業者が溶湯を取鍋で直接保持
炉に注入し、湯面が所定レベルまで上昇したことをレベ
ルセンサと接続するブザーの音で知り、その後に溶湯の
注入を停止する方法で行っている。そのため、溶湯を所
定レベルまで正確に供給することは非常にむずかしく、
誤差が大きかった。また、特に、使用している金型を交
換したときなどは、保持炉内の湯面レベルを正確にキャ
ッチする必要がある。これらのためのレベル計として任
意の湯面レベルを検出できる誘導型レベル計があるが、
このレベル計は非常に値段が高いなどの問題があった。
(Prior Art) In recent years, a low pressure casting apparatus has come to control the air pressure applied to the surface of the molten metal by a microcomputer. Therefore, it is necessary to accurately supply the molten metal to a predetermined level in the holding furnace. However, conventionally, the supply of molten metal to the holding furnace is generally known by an operator who pours the molten metal directly into the holding furnace with a ladle and knows that the level of the molten metal has risen to a predetermined level by the sound of a buzzer connected to the level sensor, After that, the injection of molten metal is stopped. Therefore, it is very difficult to accurately supply the molten metal to a predetermined level,
The error was large. Further, especially when the mold being used is exchanged, it is necessary to accurately catch the molten metal level in the holding furnace. As a level meter for these, there is an inductive type level meter that can detect an arbitrary molten metal level,
This level meter had problems such as being extremely expensive.

(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、安価な湯
面レベル検出装置を使用して保持炉内の湯面レベルを正
確に検出できるようにした低圧鋳造装置を提供すること
を目的とする。
(Object of the Invention) The present invention has been made in view of the above circumstances, and provides a low-pressure casting apparatus capable of accurately detecting a molten metal level in a holding furnace by using an inexpensive molten metal level detecting device. The purpose is to do.

(発明の構成) 以下、本発明の構成について実施例の図面に基づき詳細
に説明する。(1)は溶湯保持炉であり、該保持炉
(1)の上部には、給湯口(2)を備えたプラテン
(3)が気密に装着されている。そして、該プラテン
(3)の中央上部には水平割金型(4)が取り付けられ
かつストーク(5)がプラテン(3)を貫通して垂設さ
れている。さらにプラテン(3)には保持炉(1)内の
空気圧を検出する圧力センサ(6)が取り付けられてい
るとともに、給気口(7)が形成されている。また、ス
トーク(5)の上部位置には、溶湯の存在を検知するた
めの温度センサ(8)が取り付けられている。また、前
記給気口(7)は電空比例弁(9)および減圧弁(10)
を介して図示しない圧縮空気源に連通接続されている。
(11)はマイクロコンピュータを付設した制御盤であ
り、該マイクロコンピュータのメモリには、保持炉
(1)内に所定レベルまで供給された溶湯を温度センサ
(8)の位置まで上昇させるためにその湯面にかける空
気圧に係る標準圧力と、前記保持炉(1)内に所定レベ
ルまで供給された溶湯を前記ストーク(5)の上端に設
けた金型(5)に充填加圧するに要するその湯面への空
気圧に係る標準圧力−時間パターンとが記憶されてい
る。また、制御盤(11)には、前記標準圧力と実測加圧
パターンとの比較演算により算出された湯面レベルに基
づき前記標準圧力−時間パターンを補正する手段と、該
補正された標準圧力−時間パターンに則った作動命令を
前記電空比例弁(9)に送り出す手段とが備えられてい
る。
(Structure of the Invention) Hereinafter, the structure of the present invention will be described in detail with reference to the drawings of the embodiments. (1) is a molten metal holding furnace, and a platen (3) equipped with a hot water supply port (2) is airtightly mounted on the upper part of the holding furnace (1). Then, a horizontal split mold (4) is attached to the upper center of the platen (3), and a stalk (5) is vertically provided penetrating the platen (3). Further, a pressure sensor (6) for detecting the air pressure inside the holding furnace (1) is attached to the platen (3), and an air supply port (7) is formed. Further, a temperature sensor (8) for detecting the presence of the molten metal is attached to the upper position of the stalk (5). The air supply port (7) has an electropneumatic proportional valve (9) and a pressure reducing valve (10).
Through a compressed air source (not shown).
Reference numeral (11) is a control panel provided with a microcomputer, and the memory of the microcomputer is provided for raising the molten metal supplied to a predetermined level in the holding furnace (1) to the position of the temperature sensor (8). The standard pressure related to the air pressure applied to the surface of the molten metal, and the molten metal that has been supplied to the holding furnace (1) up to a predetermined level in the mold (5) provided at the upper end of the stalk (5), which is required to pressurize the molten metal. A standard pressure-time pattern of air pressure on the surface is stored. Further, the control panel (11), a means for correcting the standard pressure-time pattern based on the molten metal surface level calculated by comparison calculation of the standard pressure and the measured pressurization pattern, and the corrected standard pressure- Means for sending an operation command according to a time pattern to the electropneumatic proportional valve (9) is provided.

(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。プラテン(3)の給湯口(2)から保持炉(1)内
に溶湯を供給した後、装置の稼動を始めると、まず、給
気口(7)から圧縮空気が供給され、その後その空気圧
が次第に高められ、これにより保持炉(1)内の溶湯が
ストーク(5)内を上昇せしめられて温度センサ(8)
の感知部と接触する。ところで温度センサ(8)は、感
知部に溶湯が接触する以前からストーク(5)内の温度
を検出して制御盤(11)に瞬時、瞬時送信するが、溶湯
が温度センサ(8)の感知部に接触すると、制御盤(1
1)に入力される温度信号は急激に変化する。一方、給
気口(7)から圧縮空気が供給されて保持炉(1)内の
圧力が次第に高められると、その圧力変化は圧力センサ
(6)に検出されて制御盤(11)に瞬時、瞬時送信され
る。そこで、ストーク(5)内の温度が急激に変化した
時、すなわち溶湯がストーク(5)内を温度センサ
(8)位置まで上昇した時の保持炉(1)内の圧力が測
定され、この測定圧力値と、マイクロコンピュータに記
憶されている標準圧力とが比較される。この結果、実際
に保持炉(1)内に供給された溶湯のレベルが、所定レ
ベルに対して如何程相違しているかに相当する圧力差が
演算される。このようにして圧力差が演算された後、保
持炉(1)内から圧縮空気が排出されて一度ストーク
(5)内の溶湯が下降される。次いで、上記の演算され
た圧力差に基づき、マイクロコンピュータに記憶されて
いる標準圧力−時間パターンが補正され、その後、この
補正された標準圧力−時間パターンに則って作動する電
空比例弁(9)で制御された空気圧が、保持炉(1)内
の湯面に再びかけられて、溶湯が金型(4)に充填・加
圧される。以後、所定の低圧鋳造工程が行われる。
(Operation of the Invention) Next, the operation of the apparatus configured as described above will be described. After the molten metal is supplied from the hot water supply port (2) of the platen (3) into the holding furnace (1) and then the operation of the apparatus is started, first, compressed air is supplied from the air supply port (7), and then the air pressure is changed. The temperature is gradually raised, whereby the molten metal in the holding furnace (1) is raised in the stalk (5) and the temperature sensor (8).
Contact with the sensing part of. By the way, the temperature sensor (8) detects the temperature in the stalk (5) and sends it to the control panel (11) instantaneously and instantly before the molten metal comes into contact with the sensing part, but the molten metal is detected by the temperature sensor (8). Control panel (1
The temperature signal input to 1) changes rapidly. On the other hand, when compressed air is supplied from the air supply port (7) and the pressure in the holding furnace (1) is gradually increased, the pressure change is detected by the pressure sensor (6) and the control panel (11) instantaneously It is sent instantly. Therefore, the pressure in the holding furnace (1) is measured when the temperature in the stalk (5) changes rapidly, that is, when the molten metal rises in the stalk (5) to the temperature sensor (8) position. The pressure value is compared with the standard pressure stored in the microcomputer. As a result, a pressure difference corresponding to how much the level of the molten metal actually supplied to the holding furnace (1) is different from the predetermined level is calculated. After the pressure difference is calculated in this way, compressed air is discharged from the holding furnace (1) and the molten metal in the stalk (5) is once lowered. Then, based on the calculated pressure difference, the standard pressure-time pattern stored in the microcomputer is corrected, and thereafter, the electropneumatic proportional valve (9 operated according to the corrected standard pressure-time pattern is used. ) Controlled air pressure is applied again to the molten metal surface in the holding furnace (1) to fill and pressurize the molten metal in the mold (4). After that, a predetermined low pressure casting process is performed.

尚、湯面レベル検出後の保持炉(1)内への空気圧供給
は、湯面レベル毎の圧力−時間パターンを記憶させてお
き、湯面レベルに応じたパターンを選択して加圧するよ
うにしてもよい。
When supplying the air pressure into the holding furnace (1) after detecting the molten metal level, the pressure-time pattern for each molten metal level is stored in advance, and the pattern according to the molten metal level is selected and pressurized. May be.

(発明の効果) 以上の説明からも明らかなように本発明は、プラテンに
圧力センサを取り付けるとともに、ストークの上部位置
に温度センサを取り付け、さらにこれらセンサをマイク
ロコンピュータに接続し、該マイクロコンピュータに
は、保持炉内に所定位置まで供給された溶湯を温度セン
サ位置まで上昇させるための湯面への空気圧に係る標準
圧力を記憶させておき、保持炉内に供給した溶湯を温度
センサまで上昇した実際の圧力を圧力センサで検出する
とともに、その検出した圧力値と前記標準圧力とを比較
するようにしたから、実際に保持炉内に供給した溶湯の
レベルを正確に検出できるようになる。すなわち、安価
な湯面レベル計を用いて演算することができ、正確な湯
面レベルを検出できるようになり、この溶湯のレベルに
対応させて湯面に空気圧をかけることができ、所定の品
質を有する製品を適確に製造することができるなどの優
れた効果を奏する。
(Effects of the Invention) As is apparent from the above description, according to the present invention, the pressure sensor is attached to the platen, the temperature sensor is attached to the upper position of the stalk, and these sensors are further connected to the microcomputer. Stores the standard pressure related to the air pressure on the molten metal surface to raise the molten metal supplied to the holding furnace to the temperature sensor position, and raises the molten metal supplied to the holding furnace to the temperature sensor. Since the actual pressure is detected by the pressure sensor and the detected pressure value is compared with the standard pressure, the level of the molten metal actually supplied into the holding furnace can be accurately detected. That is, it is possible to calculate using an inexpensive melt level meter, and it becomes possible to detect an accurate melt level, and it is possible to apply air pressure to the melt level in accordance with the level of this melt, and to obtain a predetermined quality. It has excellent effects such as the ability to accurately manufacture a product having

【図面の簡単な説明】[Brief description of drawings]

図面は本発明の一実施例を示す構成図である。 (1):溶湯保持炉、(3):プラテン (5):ストーク、(6):圧力センサ (7):給気口、(8):温度センサ (9):電空比例弁、(11):制御盤 The drawings are block diagrams showing an embodiment of the present invention. (1): Molten metal holding furnace, (3): Platen (5): Stoke, (6): Pressure sensor (7): Air inlet, (8): Temperature sensor (9): Electropneumatic proportional valve, (11) ):control panel

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】溶湯保持炉(1)の上部に、ストーク
(5)を垂設したプラテン(3)を気密に装着し、該プ
ラテン(3)には、前記保持炉(1)内の圧力を検出す
る圧力センサ(6)を取り付けるとともに、電空比例弁
(9)を介して圧縮空気源と連通する給気口(7)を形
成し、前記ストーク(5)の上部位置には温度センサ
(8)を取り付け、前記圧力センサ(6)、温度センサ
(8)および電空比例弁(9)をマイクロコンピュータ
を付設した制御盤(11)に電気的に接続し、該制御盤
(11)には、前記保持炉(1)内に所定レベルまで供給
された溶湯を前記ストーク(5)内の前記温度センサ
(8)位置まで上昇させるためにその湯面にかける空気
圧に係る標準圧力と実測圧力との比較演算による湯面レ
ベル測定手段を備えたことを特徴とする低圧鋳造装置。
1. A platen (3) vertically provided with a stalk (5) is airtightly mounted on an upper portion of the molten metal holding furnace (1), and the pressure inside the holding furnace (1) is fixed to the platen (3). A pressure sensor (6) for detecting the temperature is attached, and an air supply port (7) communicating with a compressed air source through an electropneumatic proportional valve (9) is formed, and a temperature sensor is provided above the stalk (5). (8) is attached, the pressure sensor (6), the temperature sensor (8) and the electropneumatic proportional valve (9) are electrically connected to a control panel (11) equipped with a microcomputer, and the control panel (11) In order to raise the molten metal supplied to the holding furnace (1) to a predetermined level to the position of the temperature sensor (8) in the stalk (5), the standard pressure and the actual pressure related to the air pressure applied to the molten metal surface are measured. It is specially equipped with means for measuring the molten metal level by comparison calculation with the pressure. Low-pressure casting equipment to collect.
JP60171388A 1985-08-02 1985-08-02 Low pressure casting equipment Expired - Fee Related JPH0683889B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60171388A JPH0683889B2 (en) 1985-08-02 1985-08-02 Low pressure casting equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60171388A JPH0683889B2 (en) 1985-08-02 1985-08-02 Low pressure casting equipment

Publications (2)

Publication Number Publication Date
JPS6233052A JPS6233052A (en) 1987-02-13
JPH0683889B2 true JPH0683889B2 (en) 1994-10-26

Family

ID=15922237

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60171388A Expired - Fee Related JPH0683889B2 (en) 1985-08-02 1985-08-02 Low pressure casting equipment

Country Status (1)

Country Link
JP (1) JPH0683889B2 (en)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2367566A1 (en) * 1976-10-18 1978-05-12 Pont A Mousson METHOD AND DEVICE FOR CONTROLLING A LOW PRESSURE REPETITIVE CASTING POCKET

Also Published As

Publication number Publication date
JPS6233052A (en) 1987-02-13

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