JPH0515415Y2 - - Google Patents
Info
- Publication number
- JPH0515415Y2 JPH0515415Y2 JP13147488U JP13147488U JPH0515415Y2 JP H0515415 Y2 JPH0515415 Y2 JP H0515415Y2 JP 13147488 U JP13147488 U JP 13147488U JP 13147488 U JP13147488 U JP 13147488U JP H0515415 Y2 JPH0515415 Y2 JP H0515415Y2
- Authority
- JP
- Japan
- Prior art keywords
- pressurized air
- molten metal
- air supply
- supply pipe
- stalk
- 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
Links
- 239000002184 metal Substances 0.000 claims description 61
- 238000005266 casting Methods 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 12
- 230000007423 decrease Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、低圧鋳造機における加圧空気の圧力
制御装置に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a pressure control device for pressurized air in a low-pressure casting machine.
（従来の技術）
低圧鋳造機は、金型の下方に溶湯の保持炉を配
置し、金型と保持炉との間に設けたストークを介
して、加圧空気により保持炉内の溶湯を金型キヤ
ビテイ内に圧送、充填するものであるが、このよ
うな低圧鋳造機で鋳物製品を連続的に鋳造する
と、保持炉内の溶湯は金型への注湯につれて漸次
減少し、その結果溶湯の湯面レベルが下がる。と
ころで、溶湯の金型キヤビテイへの充填速度は金
型キヤビテイと保持炉内の溶湯の湯面レベルとの
落差に反比例するから、保持炉内の溶湯に対する
加圧空気の吹込み圧力を一定にしたままである
と、溶湯の金型キヤビテイへの充填速度が低下
し、製品の品質にバラツキが生じたり、金型キヤ
ビテイへの充填の途中で溶湯の一部が早期に凝固
して鋳造欠陥になるといつたトラブルが発生す
る。このため、従来、例えば特公昭40−12971号
公報に開示されている如く、保持炉内に複数本の
電極棒を順次異なる高さに互いに絶縁して設け、
該電極棒により湯面レベルの下降状態を検出する
と共に、該検出結果に基いて保持炉内への加圧空
気の吹込み圧力を増加させるように成した圧力補
償装置が提案されている。しかし、このような装
置では、保持炉内の電極棒が溶湯中に長時間浸漬
され、かつ浸漬面積も大きいため浸食が著しく、
長持ちしない欠点がある。(Prior art) A low-pressure casting machine has a holding furnace for molten metal placed below a mold, and uses pressurized air to melt the molten metal in the holding furnace through a stalk provided between the mold and the holding furnace. When casting products continuously using such a low-pressure casting machine, the molten metal in the holding furnace gradually decreases as it is poured into the mold, and as a result, the molten metal decreases. The water level drops. By the way, since the filling speed of molten metal into the mold cavity is inversely proportional to the drop between the mold cavity and the level of the molten metal in the holding furnace, the blowing pressure of pressurized air to the molten metal in the holding furnace was kept constant. If this happens, the filling speed of the molten metal into the mold cavity will slow down, resulting in variations in product quality, or part of the molten metal will solidify early during filling into the mold cavity, resulting in casting defects. A problem will occur. For this reason, conventionally, as disclosed in Japanese Patent Publication No. 40-12971, a plurality of electrode rods are sequentially provided in a holding furnace at different heights and insulated from each other.
A pressure compensator has been proposed which detects a falling state of the metal level using the electrode rod and increases the pressure of pressurized air blown into the holding furnace based on the detection result. However, in such devices, the electrode rods in the holding furnace are immersed in the molten metal for a long time, and the immersion area is large, resulting in significant corrosion.
The downside is that it doesn't last long.
そこで近時、保持炉を昇降可能に成すと共に、
該保持炉の上方に電極棒を配設し、保持炉の上昇
により内部の溶湯が電極棒の先端と接触した時保
持炉を停止させ、この状態で保持炉内へ加圧空気
を吹込むことにより、加圧空気の吹込み圧力の補
償を不要にすると共に、電極棒と溶湯との接触を
最小限にした低圧鋳造装置が提案されている（実
開昭61−36359号公報）。 Therefore, recently, the holding furnace was made to be able to be raised and lowered, and
An electrode rod is disposed above the holding furnace, and when the molten metal inside comes into contact with the tip of the electrode rod as the holding furnace rises, the holding furnace is stopped, and pressurized air is blown into the holding furnace in this state. Accordingly, a low-pressure casting apparatus has been proposed that eliminates the need to compensate for the blowing pressure of pressurized air and minimizes the contact between the electrode rod and the molten metal (Japanese Utility Model Publication No. 36359/1983).
しかし、この装置は保持炉を昇降させるもので
あるため莫大なエネルギーを要し、装置が大がか
りになる欠点がある。 However, since this device raises and lowers the holding furnace, it requires a huge amount of energy and has the disadvantage that the device becomes large-scale.
本考案は上記のような事情に鑑みてなされたも
のであり、その第１の目的は、保持炉内の電極棒
が溶湯により浸食されることがなく、長寿命が保
証される加圧空気の圧力制御装置を提供すること
にある。 The present invention was developed in view of the above circumstances, and its first purpose is to use pressurized air to ensure that the electrode rods in the holding furnace are not eroded by molten metal and have a long service life. An object of the present invention is to provide a pressure control device.
本考案の第２の目的は、保持炉を昇降させる必
要がなく、従つて装置が大がかりにならない加圧
空気の圧力制御装置を提供することにある。 A second object of the present invention is to provide a pressurized air pressure control device that does not require raising and lowering a holding furnace and therefore does not require a large-scale device.
（問題点を解決するための手段）
本考案は上記の目的を達成するため、保持炉内
に、金型キヤビテイ内へ溶湯を圧送するための注
湯用ストークに並行して溶湯検出用ストークを垂
設すると共に該ストーク内上部にタツチセンサを
垂設し、前記保持炉を密閉状に収容する加圧タン
ク内を１次加圧して保持炉内の溶湯を前記両スト
ーク内におけるタツチセンサの検出端レベルまで
上昇させ、次に前記加圧タンク内を２次加圧して
前記注湯用ストーク内の溶湯を金型キヤビテイ内
へ圧送すると同時に、前記溶湯検出用ストーク内
の溶湯を該２次加圧空気の圧力を利用して押し下
げることを要旨としている。(Means for Solving the Problems) In order to achieve the above object, the present invention includes a molten metal detection stalk in the holding furnace in parallel with the molten metal pouring stalk for pressure-feeding the molten metal into the mold cavity. At the same time, a touch sensor is installed vertically in the upper part of the stalk, and the inside of the pressurized tank which seals the holding furnace is pressurized to increase the molten metal in the holding furnace to the detection end level of the touch sensor in both the stalks. Then, the inside of the pressurized tank is secondarily pressurized to force the molten metal in the pouring stalk into the mold cavity, and at the same time, the molten metal in the molten metal detection stalk is pumped with the secondary pressurized air. The idea is to push down using the pressure of
すなわち本考案は、溶湯の保持炉を収容する箱
体状の加圧タンクと、該加圧タンクの上端開口を
気密に閉鎖する金型台と、該金型台上に設けた金
型と、前記金型台を貫通して前記保持炉と金型キ
ヤビテイとを連通する注湯用ストークと、前記保
持炉内の溶湯を該注湯用ストークを介して前記金
型キヤビテイ内へ圧送すべく前記加圧タンク内に
加圧空気を供給する加圧空気供給管路とから成る
低圧鋳造機において、前記保持炉内に前記金型台
を貫通して溶湯検出用ストークを垂設すると共に
該ストーク内上部にタツチセンサを垂設し、前記
加圧空気供給管路を、前記加圧タンク内を１次加
圧するための第１加圧エア供給管路と、前記加圧
タンク内を２次加圧するための第２加圧エア供給
管路と、一端が該第２加圧エア供給管路と連通す
ると共に他端が前記溶湯検出用ストークの上端側
に連通する補助加圧エア供給管路とで構成し、前
記タツチセンサを、制御盤を介して、前記第１加
圧エア供給管路に介設された開閉弁、前記第２加
圧エア供給管路に介設された制御弁及び開閉弁、
前記補助加圧エア供給管路に介設された給排気弁
とそれぞれ電気接続したことを特徴としている。 That is, the present invention includes a box-shaped pressurized tank that accommodates a holding furnace for molten metal, a mold stand that airtightly closes the upper end opening of the pressurized tank, and a mold provided on the mold stand. a pouring stalk that penetrates the mold table and communicates the holding furnace and the mold cavity; In a low-pressure casting machine comprising a pressurized air supply pipe line for supplying pressurized air into a pressurized tank, a stalk for detecting molten metal is provided vertically in the holding furnace through the mold table, and a stalk for detecting molten metal is installed vertically in the holding furnace. A touch sensor is installed vertically at the top, and the pressurized air supply pipe is connected to a first pressurized air supply pipe for primarily pressurizing the inside of the pressurized tank, and a first pressurized air supply pipe for secondarily pressurizing the inside of the pressurized tank. and an auxiliary pressurized air supply pipe whose one end communicates with the second pressurized air supply pipe and whose other end communicates with the upper end of the molten metal detection stalk. and the touch sensor is connected via a control panel to an on-off valve interposed in the first pressurized air supply pipe, a control valve and an on-off valve interposed in the second pressurized air supply pipe,
It is characterized in that it is electrically connected to supply and exhaust valves interposed in the auxiliary pressurized air supply pipe.
（構成）
以下、本考案の構成を実施例に基いて詳細に説
明する。(Structure) Hereinafter, the structure of the present invention will be explained in detail based on examples.
図面は本考案の実施例を示すもので、第１図は
低圧鋳造機の縦断正面図、第２図は加圧空気の圧
力制御装置の回路図である。 The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional front view of a low-pressure casting machine, and FIG. 2 is a circuit diagram of a pressurized air pressure control device.
図において、１は低圧鋳造機の加圧タンクであ
り、該加圧タンク１は上面が開放された箱状に形
成され、その内部には溶湯を収容する保持炉２が
収納されている。また前記加圧タンク１の上端開
口は着脱可能な金型台３によつて気密に閉鎖され
ており、よつて加圧タンク１内部には保持炉２を
覆う密閉状の加圧空間が形成されている。該加圧
タンク１の一側壁には給気孔４が、また他の側壁
には排気孔５がそれぞれ貫通穿設されている。 In the figure, reference numeral 1 denotes a pressurized tank of a low-pressure casting machine. The pressurized tank 1 is formed into a box shape with an open top surface, and a holding furnace 2 for storing molten metal is housed inside the tank. Further, the upper end opening of the pressurized tank 1 is hermetically closed by a removable mold stand 3, so that a closed pressurized space that covers the holding furnace 2 is formed inside the pressurized tank 1. ing. An air supply hole 4 is formed through one side wall of the pressurized tank 1, and an exhaust hole 5 is formed through the other side wall.
前記金型台３には２個の貫通孔６，７が穿設さ
れており、該両貫通孔６，７から注湯用ストーク
８及び溶湯検出用ストーク９がそれぞれ平行に垂
設されている。なお該両ストーク８，９の下部は
前記保持炉２内の溶湯中に浸漬されている。１１
は上型１２と下型１３から成る金型であり、該下
型１３はその凹部底面に貫通穿設された注湯口１
４を前記注湯用ストーク８の上端開口を連通させ
て前記金型台３の上面に固定載置されている。な
お１５は金型キヤビテイである。 Two through holes 6 and 7 are bored in the mold stand 3, and a pouring stalk 8 and a molten metal detection stalk 9 are vertically provided in parallel from both through holes 6 and 7, respectively. . Note that the lower portions of both stalks 8 and 9 are immersed in the molten metal in the holding furnace 2. 11
is a mold consisting of an upper mold 12 and a lower mold 13, and the lower mold 13 has a pouring port 1 bored through the bottom of its recess.
4 is fixedly placed on the upper surface of the mold stand 3 with the upper end opening of the molten metal pouring stalk 8 communicating therewith. Note that 15 is a mold cavity.
前記溶湯検出用ストーク９の上端開口は、中央
部に通気孔１６を貫通穿設した蓋１７によつて気
密に閉鎖されている。また該蓋１７から、プラス
側電極棒とマイナス側電極棒から成るタツチセン
サ１８が溶湯検出用ストーク９内に垂設されてい
る。なお該タツチセンサ１８の下端は、保持炉２
内の溶湯の湯面レベルよりも常に上位になるよう
に位置決めされている。 The upper end opening of the molten metal detection stalk 9 is hermetically closed by a lid 17 having a ventilation hole 16 in the center thereof. Further, from the lid 17, a touch sensor 18 consisting of a positive electrode rod and a negative electrode rod is vertically installed in the stalk 9 for detecting molten metal. Note that the lower end of the touch sensor 18 is connected to the holding furnace 2.
It is positioned so that it is always above the level of the molten metal inside.
次に本考案装置における圧力制御回路について
第２図を参照して説明する。 Next, the pressure control circuit in the device of the present invention will be explained with reference to FIG.
２１は、一端が前記加圧タンク１における給気
孔４に連通接続すると共に、他端が機外の加圧空
気源２２に連通接続する第１加圧エア供給管路で
あり、該管路２１の途中には基端側から減圧弁２
３及び電磁開閉弁２４がその順序で配設されてい
る。２６は、一端が前記第１加圧エア供給管路２
１における減圧弁２３の上流地点で分岐すると共
に、他端が該管路２１における電磁開閉弁２４の
下流地点で合流する第２加圧エア供給管路であ
り、該管路２６の途中には基端側から比例圧力制
御弁２７及び電磁開閉弁２８がその順序で配設さ
れている。 Reference numeral 21 denotes a first pressurized air supply pipe whose one end is connected to the air supply hole 4 in the pressurized tank 1 and whose other end is connected to the pressurized air source 22 outside the machine. In the middle, there is a pressure reducing valve 2 from the proximal end.
3 and the electromagnetic on-off valve 24 are arranged in that order. 26 has one end connected to the first pressurized air supply pipe 2
This is a second pressurized air supply conduit that branches at a point upstream of the pressure reducing valve 23 in the conduit 21 and joins at the other end downstream of the electromagnetic shut-off valve 24 in the conduit 21. A proportional pressure control valve 27 and an electromagnetic on-off valve 28 are arranged in that order from the base end side.
２９は、一端が前記第２加圧エア供給管路２６
における電磁開閉弁２８の下流地点で分岐すると
共に、他端が前記蓋１７の通気孔１６に連通接続
する補助加圧エア供給管路であり、該管路２９の
途中には電磁給排気弁３１が配設されている。 29 has one end connected to the second pressurized air supply pipe 26
It is an auxiliary pressurized air supply conduit that branches at a downstream point of the electromagnetic on-off valve 28 and has the other end connected to the vent hole 16 of the lid 17, and an electromagnetic supply/exhaust valve 31 is provided in the middle of the conduit 29. is installed.
３２は、一端が前記加圧タンク１における排気
孔５に連通接続すると共に、他端が大気に開放さ
れた加圧エア排出管路であり、該管路３２の途中
には電磁開閉弁３３が配設されている。 Reference numeral 32 denotes a pressurized air discharge pipe whose one end is connected to the exhaust hole 5 of the pressurized tank 1 and the other end is open to the atmosphere. It is arranged.
３４は前記タツチセンサ１８、電磁開閉弁２
４，２８，３３及び電磁給排気弁３１とそれぞれ
電気的に接続する制御盤である。該制御盤３４は
また、電圧−電流変換器３５を介して前記比例圧
力制御弁２７とも電気接続しており、保持炉２内
の溶湯が注湯用ストーク８の所定レベル（具体的
には、溶湯検出用ストーク９におけるタツチセン
サ１８の下端レベル）まで上昇した状態におい
て、該溶湯を金型キヤビテイ１５内へ充填するの
に最適な加圧条件（これは具体的な金型キヤビテ
イの形状に応じて、高速−低速−高速と経時的に
変化する加圧パターンとして与えられる）を記憶
しており、これを必要に応じて前記電圧−電流変
換器３５に出力することにより、前記比例圧力制
御弁２７を作動させる機能を備えている。なお、
実施例の比例圧力制御弁２７に代えて比例流量制
御弁やサーボバルブを使用してもよい。 34 is the touch sensor 18 and the electromagnetic on-off valve 2
4, 28, 33 and the electromagnetic supply/exhaust valve 31, respectively. The control panel 34 is also electrically connected to the proportional pressure control valve 27 via a voltage-current converter 35, so that the molten metal in the holding furnace 2 is at a predetermined level of the pouring stalk 8 (specifically, The pressurization conditions are optimal for filling the molten metal into the mold cavity 15 when the touch sensor 18 reaches the lower end level of the molten metal detection stalk 9 (this depends on the shape of the specific mold cavity). , given as a pressurization pattern that changes over time such as high speed - low speed - high speed), and outputs this to the voltage-current converter 35 as necessary to control the proportional pressure control valve 27. It has the function to operate. In addition,
A proportional flow control valve or a servo valve may be used in place of the proportional pressure control valve 27 of the embodiment.
（作用）
上記のように構成された低圧鋳造機において、
保持炉２内に所定量の溶湯を収容し、加圧タンク
１の上端開口を金型台３によつて気密に閉鎖し、
加圧エア排出管路３２における電磁開閉弁３３を
閉鎖すると共に、補助加圧エア供給管路２９にお
ける電磁給排気弁３１を排気モードにして溶湯検
出用ストーク９内の空気が蓋１７の通気孔１６を
経て大気へ排出可能に成した状態で、第２加圧エ
ア供給管路２６における電磁開閉弁２８を閉鎖す
ると共に、第１加圧エア供給管路２１における電
磁開閉弁２４を開放すると、減圧弁２３により所
定圧力（例えば0.2Kg／cm2）に減圧された加圧空
気が加圧タンク１内へ供給される。(Function) In the low pressure casting machine configured as above,
A predetermined amount of molten metal is stored in a holding furnace 2, and the upper opening of the pressurized tank 1 is hermetically closed by a mold stand 3.
The electromagnetic on-off valve 33 in the pressurized air discharge pipe 32 is closed, and the electromagnetic supply/exhaust valve 31 in the auxiliary pressurized air supply pipe 29 is set to the exhaust mode so that the air in the molten metal detection stalk 9 flows through the vent hole in the lid 17. When the electromagnetic on-off valve 28 in the second pressurized air supply conduit 26 is closed and the electromagnetic on-off valve 24 in the first pressurized air supply conduit 21 is opened in a state where the air can be discharged to the atmosphere through the pressurized air supply conduit 16, Pressurized air reduced to a predetermined pressure (for example, 0.2 kg/cm 2 ) by the pressure reducing valve 23 is supplied into the pressurized tank 1 .
該加圧空気は保持炉２内の溶湯の湯面を押圧
し、これにより溶湯の一部が注湯用ストーク８及
び溶湯検出用ストーク９内をほぼ等速で上昇し、
やがて後者のストーク９内を上昇する溶湯がタツ
チセンサ１８の下端に接触して該タツチセンサ１
８が通電状態になり、制御盤３４を作動させる。
すなわち該制御盤３４から信号が出力されて、前
記第１加圧エア供給管路２１における電磁開閉弁
２４が閉鎖されると共に、前記補助加圧エア供給
管路２９における電磁給排気弁３１が一旦閉鎖さ
れる。これにより前記加圧タンク１内への加圧空
気の供給が停止され、前記両ストーク８，９内に
おける溶湯の上昇が停止し、加圧タンク１内の加
圧状態が維持される。 The pressurized air presses the surface of the molten metal in the holding furnace 2, and as a result, a portion of the molten metal rises at approximately constant speed within the pouring stalk 8 and the molten metal detection stalk 9,
Eventually, the molten metal rising inside the latter stalk 9 comes into contact with the lower end of the touch sensor 18, and the touch sensor 1
8 becomes energized, and the control panel 34 is activated.
That is, a signal is output from the control panel 34, the electromagnetic on-off valve 24 in the first pressurized air supply line 21 is closed, and the electromagnetic supply/exhaust valve 31 in the auxiliary pressurized air supply line 29 is temporarily closed. Closed. As a result, the supply of pressurized air into the pressurized tank 1 is stopped, the rise of the molten metal in both the stalks 8 and 9 is stopped, and the pressurized state in the pressurized tank 1 is maintained.
しかる後、前記制御盤３４からの出力信号によ
り前記電圧−電流変換器３５が作動すると共に、
前記第２加圧エア供給管路２６における電磁開閉
弁２８が開放される。また前記補助加圧エア供給
管路２９の電磁給排気弁３１が給気モードにされ
る。その結果、加圧空気が第２加圧エア供給管路
２６を経て、かつ該管路２６における比例圧力制
御弁２７により、例えば0.3〜0.5Kg／cm2の範囲内
で経時的に圧力を変化せしめられつつ前記加圧タ
ンク１内へ供給される。これにより保持炉２内の
溶湯の湯面が更に押圧され、注湯用ストーク８内
の溶湯が再び上昇せしめられて金型キヤビテイ１
５内へ圧送、充填される。 Thereafter, the voltage-current converter 35 is activated by the output signal from the control panel 34, and
The electromagnetic on-off valve 28 in the second pressurized air supply pipe 26 is opened. Further, the electromagnetic supply/exhaust valve 31 of the auxiliary pressurized air supply pipe 29 is set to the air supply mode. As a result, the pressurized air passes through the second pressurized air supply line 26, and the proportional pressure control valve 27 in the line 26 changes the pressure over time within the range of, for example, 0.3 to 0.5 kg/ cm2 . It is supplied into the pressurized tank 1 while being forced. As a result, the surface of the molten metal in the holding furnace 2 is further pressed, and the molten metal in the pouring stalk 8 is raised again to the mold cavity 1.
5 is pumped and filled.
一方、上記加圧空気は、補助加圧エア供給管路
２９にも流れ、該管路２９における電磁給排気弁
３１を通過し、前記蓋１７の通気孔１６を経て溶
湯検出用ストーク９内へ供給される。 On the other hand, the pressurized air also flows into the auxiliary pressurized air supply pipe 29, passes through the electromagnetic supply/exhaust valve 31 in the pipe 29, passes through the vent hole 16 of the lid 17, and enters the molten metal detection stalk 9. Supplied.
その結果、該ストーク９内の溶湯が押し下げら
れ、前記タツチセンサ１８の下端部と溶湯との接
触状態が解除される。 As a result, the molten metal in the stalk 9 is pushed down, and the contact between the lower end of the touch sensor 18 and the molten metal is released.
次に、金型キヤビテイ１５内で溶湯が凝固を完
了した時点で、前記第２加圧エア供給管路２６の
電磁開閉弁２８を閉鎖すると共に、加圧エア排出
管路３２の電磁開閉弁３３を開放し、かつ前記補
助加圧エア供給管路２９の電磁給排気弁３１を排
気モードにし、以て加圧タンク１及び溶湯検出用
ストーク９内の加圧空気を大気へ排出すると、保
持炉２及び前記両ストーク８，９内の溶湯の湯面
レベルが初期状態（第２図の状態）に戻る（但
し、鋳込み分だけ湯面が下つている）。 Next, when the molten metal completes solidification within the mold cavity 15, the electromagnetic on-off valve 28 of the second pressurized air supply line 26 is closed, and the electromagnetic on-off valve 33 of the pressurized air discharge line 32 is closed. When the holding furnace 2 and the molten metal level in both the stokes 8 and 9 return to the initial state (the state shown in FIG. 2) (however, the molten metal level is lowered by the amount of pouring).
以上の諸工程を１サイクルとして以後同じサイ
クルがくり返され、鋳物製品が連続的に鋳造され
るものである。 The above steps constitute one cycle, and the same cycle is repeated thereafter to continuously cast cast products.
なお、鋳込みにつれて保持炉内の溶湯は漸次減
少し、これに反比例して加圧タンク内の圧力は
徐々に上昇するから、毎回の鋳込みにおける溶湯
の金型キヤビテイへの充填速度を厳密な意味で一
定に保つためには、２次加圧の際、加圧タンク内
の圧力上昇に見合う圧力補正（増圧）を行つて、
加圧空気が一定の速度で該タンク内へ供給される
ようにコントロールする必要がある。 Furthermore, as the molten metal is poured, the amount of molten metal in the holding furnace gradually decreases, and the pressure in the pressurized tank gradually increases in inverse proportion to this. In order to keep it constant, during secondary pressurization, make pressure correction (pressure increase) commensurate with the pressure increase in the pressurized tank.
It is necessary to control the supply of pressurized air into the tank at a constant rate.
（考案の効果）
上記のような本考案によれば、保持炉の上方に
配設されたタツチセンサは溶湯との接触面積が小
さく、かつ接触時間が短かいため、溶湯に浸食さ
れる度合が極めて少なく、長寿命が保証される。
また、本考案装置は、加圧空気によつて溶湯を注
湯用ストーク内の所定レベルまで上昇させるよう
にしており、保持炉を上昇させるものではないた
め、装置が大がかりになることはない。(Effects of the invention) According to the invention as described above, the touch sensor disposed above the holding furnace has a small contact area with the molten metal and a short contact time, so it is extremely unlikely to be eroded by the molten metal. low, long life is guaranteed.
In addition, the device of the present invention uses pressurized air to raise the molten metal to a predetermined level in the pouring stalk, and does not raise the holding furnace, so the device does not become large-scale.
また、実施例においては、１次加圧エヤーを供
給管２１から供給しているが、第１加圧エヤー供
給管２１、減圧弁２３及び電磁開閉弁２４を取り
除き、第２加圧エヤー供給管２６を介して１次加
圧エヤーを供給するようにしてもよい。 Further, in the embodiment, the primary pressurized air is supplied from the supply pipe 21, but the first pressurized air supply pipe 21, the pressure reducing valve 23, and the electromagnetic on-off valve 24 are removed, and the second pressurized air supply pipe Primary pressurized air may be supplied via 26.
図面は本考案の実施例を示すもので、第１図は
低圧鋳造機の縦断正面図、第２図は加圧空気の圧
力制御装置の回路図である。
１……加圧タンク、２……保持炉、３……金型
台、８……注湯用ストーク、９……溶湯検出用ス
トーク、１１……金型、１５……金型キヤビテ
イ、１８……タツチセンサ、２１……第１加圧エ
ア供給管路、２４，２８……開閉弁、２６……第
２加圧エア供給管路、２７……制御弁、２９……
補助加圧エア供給管路、３１……給排気弁、３４
……制御盤。
The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal sectional front view of a low-pressure casting machine, and FIG. 2 is a circuit diagram of a pressurized air pressure control device. DESCRIPTION OF SYMBOLS 1... Pressure tank, 2... Holding furnace, 3... Mold stand, 8... Stoke for pouring metal, 9... Stoke for detecting molten metal, 11... Mold, 15... Mold cavity, 18 ...Touch sensor, 21...First pressurized air supply line, 24, 28...Opening/closing valve, 26...Second pressurized air supply line, 27...Control valve, 29...
Auxiliary pressurized air supply pipe, 31... Supply/exhaust valve, 34
……control panel.
Claims (1)
１と、該加圧タンク１の上端開口を気密に閉鎖す
る金型台３と、該金型台３上に設けた金型１１
と、前記金型台３を貫通して前記保持炉２と金型
キヤビテイ１５とを連通する注湯用ストーク８
と、前記保持炉２内の溶湯を該注湯用ストーク８
を介して前記金型キヤビテイ１５内へ圧送すべく
前記加圧タンク１内に加圧空気を供給する加圧空
気供給管路とから成る低圧鋳造機において、前記
保持炉２内に前記金型台３を貫通して溶湯検出用
ストーク９を垂設すると共に該ストーク９内上部
にタツチセンサ１８を垂設し、前記加圧空気供給
管路を、前記加圧タンク１内を１次加圧するため
の加圧エア供給管路と、一端が該加圧エア供給管
路と連通すると共に他端が前記溶湯検出用ストー
ク９の上端側に連通する補助加圧エア供給管路２
９とで構成し、前記タツチセンサ１８を、制御盤
３４を介して、前記加圧エア供給管路に介設され
た制御弁２７及び開閉弁、前記補助加圧エア供給
管路２９に介設された給排気弁３１とそれぞれ電
気接続したことを特徴とする低圧鋳造機における
加圧空気の圧力制御装置。 A box-shaped pressurized tank 1 that accommodates a holding furnace 2 for molten metal, a mold stand 3 that airtightly closes the upper end opening of the pressurized tank 1, and a mold 11 provided on the mold stand 3.
and a pouring stalk 8 that penetrates the mold table 3 and communicates the holding furnace 2 and the mold cavity 15.
Then, the molten metal in the holding furnace 2 is transferred to the pouring stalk 8.
and a pressurized air supply pipe for supplying pressurized air into the pressurized tank 1 to be fed into the mold cavity 15 under pressure through the mold cavity 15. A stalk 9 for detecting molten metal is vertically provided through the tank 3, and a touch sensor 18 is vertically installed in the upper part of the stalk 9, and the pressurized air supply pipe is connected to the pressure tank 1 for primary pressurization. a pressurized air supply pipe, and an auxiliary pressurized air supply pipe 2 having one end communicating with the pressurized air supply pipe and the other end communicating with the upper end side of the molten metal detection stalk 9.
9, the touch sensor 18 is connected via the control panel 34 to a control valve 27 and an on-off valve interposed in the pressurized air supply pipe, and a control valve 27 and an on-off valve interposed in the auxiliary pressurized air supply pipe 29. 1. A pressure control device for pressurized air in a low-pressure casting machine, characterized in that it is electrically connected to an air supply and exhaust valve 31.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13147488U JPH0515415Y2 (en) | 1988-10-07 | 1988-10-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13147488U JPH0515415Y2 (en) | 1988-10-07 | 1988-10-07 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0253859U JPH0253859U (en) | 1990-04-18 |
| JPH0515415Y2 true JPH0515415Y2 (en) | 1993-04-22 |
Family
ID=31387578
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13147488U Expired - Lifetime JPH0515415Y2 (en) | 1988-10-07 | 1988-10-07 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0515415Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007075873A (en) * | 2005-09-16 | 2007-03-29 | Honda Motor Co Ltd | System for monitoring pressurizing apparatus |
| JP4697609B2 (en) * | 2007-01-16 | 2011-06-08 | 新東工業株式会社 | Foundry sand casting type mold making equipment |
| JP5547035B2 (en) * | 2010-10-28 | 2014-07-09 | 本田技研工業株式会社 | Low pressure casting furnace and low pressure casting method using the low pressure casting furnace |
-
1988
- 1988-10-07 JP JP13147488U patent/JPH0515415Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0253859U (en) | 1990-04-18 |
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