JPH03210958A - Vacuum casting equipment - Google Patents

Vacuum casting equipment

Info

Publication number
JPH03210958A
JPH03210958A JP570590A JP570590A JPH03210958A JP H03210958 A JPH03210958 A JP H03210958A JP 570590 A JP570590 A JP 570590A JP 570590 A JP570590 A JP 570590A JP H03210958 A JPH03210958 A JP H03210958A
Authority
JP
Japan
Prior art keywords
molten metal
valve
cavity
crucible
gas
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
Application number
JP570590A
Other languages
Japanese (ja)
Inventor
Eiji Naruse
成瀬 英次
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 JP570590A priority Critical patent/JPH03210958A/en
Publication of JPH03210958A publication Critical patent/JPH03210958A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To prevent oxidation of molten metal and to manufacture a casting product having good quality by pressurizing upper face of the molten metal in a holding fur nace with insert gas at the time of pouring and filling up the molten metal in the holding furnace into cavity in a metallic mold through a stoke. CONSTITUTION:After sucking and reducing the pressure in a reducing pressure chamber H, cavity C and crucible 2 in the holding furnace 3 with a surge tank 23 fro vacuum by opening solenoid valves 21, 28, the valves 21, 28 are shut and a solenoid valve 25 is opened. By this method, Ar gas in an Ar surge tank 27 is sucked and supplied into the crucible 2, and stored on the molten metal M, and by gridually regulating a flow rute control value 26, the molten metal M is pressed with the Ar gas, poured and filled up into the cavity C through the stoke 9 and intermediate stoke 8. When solidification of the filled-up molten metal M is completed, the valve 25 is shut and the valve 28 is opened to communicate inner part of the crucible 2 with inner part of the reducing pressure chamber H, and a part of the Ar gas in the crucible 2 is sucked and supplied in the reducing pressure chamber H and filled up between the wall face of cavity C and solidified metal. By this method, leakage of the Ar gas to outside of the apparatus is restricted and the casting product having good quality is obtd.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、アノレゴンガス,窒素ガス等の不活性ガスを
使用して保持炉内の溶融金属を水平割金型のキャビティ
内に注入し充填させるのに好適な鋳造装置に関する。
Detailed Description of the Invention (Field of Industrial Application) The present invention uses inert gas such as anoregon gas and nitrogen gas to inject and fill the molten metal in a holding furnace into the cavity of a horizontally split mold. This invention relates to a casting device suitable for.

(従来の技術) 従来、保持炉内の溶融金属をストークを介して金型のキ
ャビティ内に注入し充填させるに際し、溶融金属の酸化
を防ぐため、アルゴンがス等の不活性ガスにより、保持
炉内の溶融金属の上面を加圧するようにしたものがある
(Prior art) Conventionally, when injecting molten metal in a holding furnace into a mold cavity through a stalk and filling it, in order to prevent oxidation of the molten metal, the holding furnace was filled with an inert gas such as argon gas. There is one that pressurizes the top surface of the molten metal inside.

(発明が解決しようとする課題) しかし、従来のこのような装置では、不活性ガスの圧力
が大気圧より高いために装置の外へ漏れたりし、しかも
溶融金属が金型キャビティ内の空気と接触して酸化され
るなどの問題があった。
(Problem to be solved by the invention) However, in such a conventional device, the pressure of the inert gas is higher than atmospheric pressure, so it sometimes leaks out of the device, and moreover, the molten metal mixes with the air in the mold cavity. There were problems such as oxidation on contact.

本発明は、上記の問題を解消するためになされたもので
、金型のキャピテイ内を減圧するとともに、保持炉内の
溶融金属を金型のキャビティ内に注入充填し得るように
した装置を提供することを目的とする。
The present invention was made to solve the above problems, and provides an apparatus that can reduce the pressure inside the cavity of a mold and inject and fill the molten metal in the holding furnace into the cavity of the mold. The purpose is to

(課題を解決するための手段) 上記目的を達成するために本発明においては、溶湯保持
炉上に、上・下ダイプレートと上・下カバーとで水平割
型の減圧室を構成するとともに、該減圧室内には水平割
金型を取り付け、下カバには配管、電磁開閉弁および流
量制御弁を介して真空源を連通接続し、保持炉内には、
配管、電磁開閉弁および流量制御弁を介して不活性ガス
発生源を連通接続し、さらに前記両配管間に電磁開閉弁
付連通管を設けるようにしたものである。
(Means for Solving the Problems) In order to achieve the above object, in the present invention, a horizontally split type decompression chamber is configured on the molten metal holding furnace by upper and lower die plates and upper and lower covers, and A horizontal split mold is installed in the decompression chamber, a vacuum source is connected to the lower cover via piping, an electromagnetic on-off valve, and a flow control valve, and inside the holding furnace,
An inert gas generation source is connected through piping, an electromagnetic on-off valve, and a flow rate control valve, and a communication pipe with an electromagnetic on-off valve is provided between the two pipings.

(作 用) 上記のように構成された減圧装置においては、上・下カ
バーを合わせて減圧室を画成するとともに上・下金型を
合わせてキャビティを画成したのち、減圧室を介してキ
ャビティ内を吸引減圧するとともに、保持炉内をも吸引
減圧し、続いて、保持炉内に不活性ガスを吸引供給して
、不活性ガスの自重による保持炉内溶融金属への押圧力
と金型キャビティ内の減圧による吸引力の協働によりす
なわち、保持炉内とキャビティ内との差圧により、保持
炉内の溶融金属を金型キャビティ内に注入し充填させる
。注入された溶融金属の凝固完了後、保持炉内を前記減
圧室に連通させて保持炉内の不活性ガスの一部を減圧室
内に吸引供給し、該減圧室内を大気圧にしたのち前記上
カバーおよび上金型を上昇させて鋳造品を取り出す。
(Function) In the decompression device configured as above, the upper and lower covers are combined to define a decompression chamber, and the upper and lower molds are combined to define a cavity, and then The inside of the cavity is depressurized by suction, and the inside of the holding furnace is also suctioned down, and then an inert gas is suctioned and supplied into the holding furnace to reduce the pressing force on the molten metal in the holding furnace due to the weight of the inert gas and the metal pressure inside the holding furnace. The molten metal in the holding furnace is injected into the mold cavity and filled by the cooperation of the suction force due to the reduced pressure inside the mold cavity, that is, due to the differential pressure between the inside of the holding furnace and the inside of the cavity. After solidification of the injected molten metal is completed, the inside of the holding furnace is communicated with the vacuum chamber, a part of the inert gas inside the holding furnace is sucked and supplied into the vacuum chamber, and after the pressure inside the vacuum chamber is brought to atmospheric pressure, Raise the cover and upper mold to take out the cast product.

(実施例) 実施例について図面を参照して説明すると、炉蓋(1)
で上端開口部を気密状に閉鎖した坩堝(2)を有する保
持炉(3)上には、下ダイズレート(4)が装着され、
該下ダイプレート(4)上には、枠状の下カバー(5)
が気密状に装着されている。また、下ダイプレート(4
)上における下カバー(5)内側位置には、下カバー(
5)より高さの低い下金型(6)が取り付けられ、さら
に、下ダイプレート(4)には、仲介部材(7)を介し
て中間ストーク (8)と、ストーク (9)とが垂設
されている。また、前記保持炉(3)外周囲には門型フ
レーム(10)が設けられ、該門型フレーム(lO)に
は、ホルダ(11) (11)を介して門型フレーム(
I O)の天井部を上下に摺動自在に貫通するガイドロ
フト(12)(12)が、門型フレーム(10)の天井
部に設置した上向きのシリンダ(13)と、該シIJ 
7ダ(13)のピストンロフトの先端に固着シたフレー
ム(14)とを介して昇降可能に設けられ、該ガイドロ
ッド C12)(12)の下端間には、前記下ダイプレ
ート (4)と対向する上ダイズレート (15)が、
テされている。また、該上ダイプレート(15)の下面
には、前記下カバー(5)と対向する枠状の上カバー(
16)が気密状に装着され、さらに上ダイプレート (
15)の下面tこおける上カバー(16)内側位置には
、前記下金型(6)と対向し、かつ上カバー(16)よ
り高さの高い上金型(17)が取り付けられている。
(Example) To explain the example with reference to the drawings, the furnace lid (1)
A lower soybean plate (4) is mounted on a holding furnace (3) having a crucible (2) whose upper end opening is hermetically closed;
A frame-shaped lower cover (5) is placed on the lower die plate (4).
is installed airtight. In addition, the lower die plate (4
) on the lower cover (5) inside position, the lower cover (
5) A lower mold (6) with a lower height is attached, and an intermediate stalk (8) and a stalk (9) are attached to the lower die plate (4) via an intermediary member (7). It is set up. Further, a gate-shaped frame (10) is provided around the outer periphery of the holding furnace (3), and the gate-shaped frame (10) is connected to the gate-shaped frame (10) via a holder (11) (11).
A guide loft (12) (12), which vertically and slidably penetrates the ceiling of the IJ
The guide rod C12 (13) is provided so as to be movable up and down via a frame (14) fixed to the tip of the piston loft, and between the lower ends of the guide rod (12) is the lower die plate (4) and The opposing upper soybean rate (15) is
It has been tested. Further, on the lower surface of the upper die plate (15), a frame-shaped upper cover (
16) is installed in an airtight manner, and then the upper die plate (
15) An upper mold (17) facing the lower mold (6) and having a higher height than the upper cover (16) is attached to a position inside the upper cover (16) on the lower surface t. .

また、上ダイプレート (15)には、これが上昇した
ときに、上金型(17)に付着の鋳造品を、門型フレー
ム(10)の天井部と協働して押し出す押出し機構(1
8)が装着されている。また、前記下カバー(5)には
、配管(20) 、電磁開閉弁(21)および流量制御
弁(22)を介して真空源としての真空用サージタンク
 (23)が連通接続されている。また、前記保持炉(
3)の坩堝(2)には配管(2,4)、電磁開閉弁(2
5)および流量制御弁(26)を介して不活性ガス発生
源としてのアルゴンガスサージタンク (27)が連通
接続されている。また、前記配管(20)(24)間に
は電磁開閉弁(28)付連通管(20A)が設けられて
いる。
The upper die plate (15) also has an extrusion mechanism (1) that, when the upper die plate (15) is raised, extrudes the cast product attached to the upper die (17) in cooperation with the ceiling of the portal frame (10).
8) is installed. Further, a vacuum surge tank (23) as a vacuum source is connected to the lower cover (5) through a pipe (20), an electromagnetic on-off valve (21), and a flow control valve (22). In addition, the holding furnace (
3) The crucible (2) has piping (2, 4) and an electromagnetic shut-off valve (2).
5) and an argon gas surge tank (27) as an inert gas generation source are connected through a flow rate control valve (26). Further, a communication pipe (20A) with an electromagnetic on-off valve (28) is provided between the pipes (20) and (24).

さらに前記下カバー(5)および保持炉(3)には圧力
センサ(29)、 (30)がそれぞれ装着され、さら
tこ前記上カバー(16)には電磁開閉弁(31)付の
配管(31A)が装着されている。また、前記電磁開閉
弁(21)(25)(28)(31) 、流量制御弁(
22)(26)および圧力センサ(29)(3(ト)は
制御盤(32)に電気的に接続されている。
Further, the lower cover (5) and the holding furnace (3) are equipped with pressure sensors (29) and (30), respectively, and the upper cover (16) is equipped with a pipe (31) equipped with an electromagnetic shut-off valve (31). 31A) is installed. In addition, the electromagnetic on-off valve (21) (25) (28) (31), the flow control valve (
22) (26) and pressure sensors (29) (3(g)) are electrically connected to the control panel (32).

次にこのように構成された装置の作動について説明する
と、保持炉(3)の坩堝(2)内tこ溶融金属CM)を
所定量装入するとともに、電磁開閉弁(21)(25)
(28)(31)を閉じておく。
Next, to explain the operation of the device configured in this way, a predetermined amount of molten metal CM) is charged into the crucible (2) of the holding furnace (3), and the electromagnetic on-off valves (21) and (25)
(28) Close (31).

この状態の下に、図示するように、シリンダ(13)の
収縮作動により土カバー(16)および上金型(17)
を下降させてこれらを下カバー(5)および下金型(6
)にそれぞれ合わせ、これにより、気密状の減圧室(I
I)と、キャビティ (C)とを画成する。次いで、電
磁開閉弁(21)、 (28)を開いて減圧室(I)、
キャビティ(C)および坩堝(2)内を吸引減圧し、続
いて電磁開閉弁(21)(28)を閉じるとともに電磁
開閉弁(25)を開く。すると、アルゴンサージクンク
(27)内のアルゴンガスが坩堝(2)内に吸引供給さ
れ、坩堝(2)内に吸引されたアルゴンガスは、比重が
空気より犬ぎいため、坩堝(2)内の溶融金属(\O上
に貯まり、これと同時に減圧室qD および坩堝(2)
内の各圧力が圧力センサ(29)(30)によって検出
されるとともにその結果が制御盤(32)に遂次入力さ
れる。
Under this state, as shown in the figure, the soil cover (16) and the upper mold (17) are closed by the contraction operation of the cylinder (13).
lower the lower cover (5) and lower mold (6).
), thereby creating an airtight vacuum chamber (I
I) and a cavity (C). Next, open the electromagnetic on-off valves (21) and (28) to open the decompression chamber (I).
The pressure inside the cavity (C) and the crucible (2) is reduced by suction, and then the electromagnetic on-off valves (21) and (28) are closed, and the electromagnetic on-off valve (25) is opened. Then, the argon gas in the argon surge pump (27) is sucked and supplied into the crucible (2), and the argon gas sucked into the crucible (2) has a specific gravity higher than that of air, so the argon gas is sucked into the crucible (2). The molten metal (accumulates on \O, and at the same time, the vacuum chamber qD and crucible
Each pressure within is detected by pressure sensors (29) and (30), and the results are sequentially input to the control panel (32).

これにより、流量制御弁(26)が遂次調整されて、坩
堝(2)内の溶融金Jl (M)は、所定の圧力制御の
下にアルゴンガスでその上面を押圧されてストーク(9
)中間ストーク (8)を介してキャビティ(C)内に
注入され充填されることとなる。そして、当該溶融金属
(M>の表面は、アルゴンガスによって被われる。こう
してキャピテイ (C)内に充填された溶融金属(M)
が凝固を完了したのち、電磁開閉弁(25)を閉じると
ともに電磁開閉弁(28)を開き、配管(24)(20
A)(20)および電磁開閉弁(28)を介して坩堝(
2)内と減圧室()D内とを連通させる。するト、坩堝
(2)内のアルゴンガスの一部は減圧室(+()内に吸
引供給されたのち、上・下金型(] 7) (6)間の
隙間、空気法きベント(図示せず)等からキャピテイ 
(C)内に流入してキャビティ (0の壁面と凝固金属
(鋳造品)との間に充満される。
As a result, the flow rate control valve (26) is successively adjusted, and the upper surface of the molten gold Jl (M) in the crucible (2) is pressed with argon gas under predetermined pressure control, and the stoke (9) is
) It is injected and filled into the cavity (C) through the intermediate stalk (8). Then, the surface of the molten metal (M>) is covered with argon gas.The molten metal (M) filled in the cavity (C) in this way
After the solidification is completed, the electromagnetic on-off valve (25) is closed and the electromagnetic on-off valve (28) is opened, and the piping (24) (20
A) (20) and the crucible (
2) communicate with the interior of the decompression chamber ()D. After that, a part of the argon gas in the crucible (2) is sucked and supplied into the decompression chamber (+), and then the gap between the upper and lower molds (7) and (6), the air vent ( (not shown) etc.
(C) and fills the space between the wall of the cavity (0) and the solidified metal (casting).

次いで、電磁開閉弁(31)を開いて減圧室(1()内
のF■モ勾を大気圧と同一・にしたのち、シリンダ(1
3)を伸長作動して上ダイプレート(15)、上金型(
17)等を−1−Hさせると、鋳造品が上金型 (17
)に付着した状態で1−金型(17)は上昇され、その
後、押出し機l (+8)が凹型フレーム(lO)の天
井部に当接して鋳造品が1−金型(17)から押し出さ
れる。一方、中間ノ1−り(8)およびストーク(9)
内の溶融金Ji (hs)は下口し、て坩堝(2)内に
戻るが、その表面は下金型(6)のギャビティ部内に残
留していたアルゴンによ−1て被われることとなる。
Next, open the electromagnetic on-off valve (31) to make the F mode gradient in the decompression chamber (1) the same as atmospheric pressure, and then open the cylinder (1).
3) is extended and the upper die plate (15) and upper die (
17), etc., when the mold is -1-H, the cast product becomes the upper mold (17
), the mold 1 (17) is lifted up, and then the extruder l (+8) comes into contact with the ceiling of the concave frame (lO) and the cast product is extruded from the mold 1 (17). It will be done. On the other hand, intermediate 1-ri (8) and stoke (9)
The molten gold Ji (hs) inside flows downward and returns to the crucible (2), but its surface is covered with argon remaining in the gap of the lower mold (6). Become.

なよ。、不活性ガスとしては、アルゴンガスや窒素ガス
があるが、空気より比重の大きいアルゴンガスが好適で
ある。
No. Examples of the inert gas include argon gas and nitrogen gas, and argon gas, which has a higher specific gravity than air, is preferable.

(効 果) 以f=−力説四からも明らかなように第1発明によれは
水平割合型を水平割減圧室内に取り付けてこ才1「、を
吸引減圧するとともに、保持炉内をもpLit、・友)
I−し、た、らち、保持炉内に不活性ガスを吸引減圧り
、−C保持炉内の溶融金属をストークを介して上昇″′
彷・−(充填させることができるため、溶融金属の表面
を常に不活性ガスで被った状態で溶融金属を金型キャビ
ティ内に注入充填させることが可能になるとともに金型
キャビテイ面と溶融金属との間に空気が存在しないため
、溶融金属が早く凝固して良質の鋳造品が得られ、しか
も、鋳造工程中は高価な不活性ガスが装置の外に漏れる
ことは少なく、その上、鋳造後に減圧室を開いたとき、
不活性ガスを圧入する場合tこ比べて下カバー内から流
れ出る量が少ない。また、第2発明によれば、下カバー
内の残留不活性ガスが下金型上を流れてストーク内に流
入しやすいため、ストーク内の溶融金属の表面を不活性
ガスによってより確実に被うことが可能になるなどの優
れた効果を奏する。
(Effect) As is clear from f=-Emphasis 4, according to the first invention, the horizontal proportion type is installed in the horizontally split depressurization chamber to suction and depressurize the holding furnace. ·friend)
I-C, the inert gas is sucked into the holding furnace and the pressure is reduced, and the molten metal in the -C holding furnace rises through the stalk.''
(Since it can be filled, it is possible to inject and fill the molten metal into the mold cavity while the surface of the molten metal is always covered with inert gas, and the mold cavity surface and molten metal are Because there is no air between them, the molten metal solidifies quickly and produces high-quality castings, and less expensive inert gas leaks out of the equipment during the casting process. When the decompression chamber is opened,
Compared to when inert gas is pressurized, the amount flowing out from inside the lower cover is smaller. Further, according to the second invention, the residual inert gas in the lower cover flows over the lower mold and easily flows into the stalk, so that the surface of the molten metal in the stalk is more reliably covered with the inert gas. It has excellent effects such as making it possible to

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

図面は本発明の一実施例を示す一部切欠断面正面図であ
る。
The drawing is a partially cutaway sectional front view showing an embodiment of the present invention.

Claims (1)

【特許請求の範囲】 1、溶融金属を保持する保持炉(3)と、該保持炉(3
)上に装着された下ダイプレート(4)と、該下ダイプ
レート(4)上に気密状に装着された枠状の下カバー(
5)と、前記ダイプレート(4)の上面における前記下
カバー(5)内側に取付けられた下金型(6)と、前記
下ダイプレート(4)に垂設されたストーク(9)と、
該ストーク(9)と前記下金型(6)との間に配設され
た中間ストーク(8)と、前記下ダイプレート(4)の
上方に昇降可能に配設された上ダイプレート(15)と
、該上ダイプレート(15)の下面に気密状に装着され
た枠状の上カバー(16)と、前記上ダイプレート(1
5)の下面における前記上カバー(16)内側に取付け
られた上金型(17)と、前記下カバー(5)に配管(
20)、電磁開閉弁(21)および流量制御弁(22)
を介して連通接続された真空源(23)と、前記保持炉
(3)に配管(24)、電磁開閉弁(25)および流量
制御弁(26)を介して連通接続された不活性ガス発生
源(27)と、前記配管(20)と配管(24)との間
に連通して設けられた電磁開閉弁(28)付の連通管(
20A)と、を具備したことを特徴とする減圧鋳造装置
。 2、前記上・下カバー(16)・(5)の合せ面レベル
を、前記上・下金型(17)(6)の合せ面レベルより
高くしたことを特徴とする第1請求項記載の減圧鋳造装
置。
[Claims] 1. A holding furnace (3) for holding molten metal;
) a lower die plate (4) mounted on the lower die plate (4), and a frame-shaped lower cover (
5), a lower mold (6) attached to the inside of the lower cover (5) on the upper surface of the die plate (4), and a stalk (9) vertically installed on the lower die plate (4);
An intermediate stalk (8) disposed between the stalk (9) and the lower mold (6), and an upper die plate (15) disposed movably above the lower die plate (4). ), a frame-shaped upper cover (16) airtightly attached to the lower surface of the upper die plate (15), and a frame-shaped upper cover (16) attached to the lower surface of the upper die plate (15);
5) The upper mold (17) attached to the inside of the upper cover (16) on the lower surface and the piping (
20), electromagnetic on-off valve (21) and flow control valve (22)
A vacuum source (23) is connected to the holding furnace (3) through a pipe (24), an electromagnetic shut-off valve (25), and a flow control valve (26). a communication pipe (with an electromagnetic on-off valve (28) provided in communication between the source (27), the pipe (20) and the pipe (24));
20A) A vacuum casting apparatus characterized by comprising: 2. The mating surface level of the upper and lower covers (16) and (5) is set higher than the mating surface level of the upper and lower molds (17) and (6). Vacuum casting equipment.
JP570590A 1990-01-12 1990-01-12 Vacuum casting equipment Pending JPH03210958A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP570590A JPH03210958A (en) 1990-01-12 1990-01-12 Vacuum casting equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP570590A JPH03210958A (en) 1990-01-12 1990-01-12 Vacuum casting equipment

Publications (1)

Publication Number Publication Date
JPH03210958A true JPH03210958A (en) 1991-09-13

Family

ID=11618530

Family Applications (1)

Application Number Title Priority Date Filing Date
JP570590A Pending JPH03210958A (en) 1990-01-12 1990-01-12 Vacuum casting equipment

Country Status (1)

Country Link
JP (1) JPH03210958A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010005649A (en) * 2008-06-26 2010-01-14 Sintokogio Ltd Casting device
CN108772555A (en) * 2018-06-25 2018-11-09 溧阳市联华机械制造有限公司 A kind of suction pouring room explosion-protection equipment and its control method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010005649A (en) * 2008-06-26 2010-01-14 Sintokogio Ltd Casting device
CN108772555A (en) * 2018-06-25 2018-11-09 溧阳市联华机械制造有限公司 A kind of suction pouring room explosion-protection equipment and its control method

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