JP2668586B2 - Mold casting method for low melting point alloy castings - Google Patents
Mold casting method for low melting point alloy castingsInfo
- Publication number
- JP2668586B2 JP2668586B2 JP1312898A JP31289889A JP2668586B2 JP 2668586 B2 JP2668586 B2 JP 2668586B2 JP 1312898 A JP1312898 A JP 1312898A JP 31289889 A JP31289889 A JP 31289889A JP 2668586 B2 JP2668586 B2 JP 2668586B2
- Authority
- JP
- Japan
- Prior art keywords
- melting point
- mold
- point alloy
- piston
- low melting
- 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
Links
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 (産業上の利用分野) 本発明は、保持炉内の低融点合金をシリンダ・ピスト
ンおよびノズルを介し金型に加圧注入して低融点合金鋳
物を製造する方法の改良に関する。The present invention relates to a method for producing a low melting point alloy casting by pressurizing a low melting point alloy in a holding furnace into a mold through a cylinder / piston and a nozzle. Regarding improvement.
(従来技術とその課題) 近年、実公昭60−5968号公告公報や実開昭61−63354
号公開公報に記載されている金型鋳造機を用いてビスマ
スあるいはアンチモンを含有する低融点合金鋳物を鋳造
する方法、すなわち、保持炉内の溶融低融点合金をシリ
ンダ・ピストンおよびノズルを介し金型に加圧注入して
低融点合金鋳物を製造する方法が提案されている。(Prior art and its problems) In recent years, the official gazette of Japanese Utility Model Publication No. 60-5968 and the Japanese Utility Model Publication No. 61-63354.
To cast a low-melting alloy casting containing bismuth or antimony using a mold casting machine described in Japanese Unexamined Patent Publication, i.e., mold a molten low-melting alloy in a holding furnace through a cylinder, a piston and a nozzle. There has been proposed a method of producing a low melting point alloy casting by injecting into a steel under pressure.
ところで、上記の金型鋳造機を用いて鋳物を鋳造する
方法においては、ピストンを下降させて保持炉内の溶融
金属を金型に加圧注入し、注入された溶融金属が凝固し
若干収縮して金型のキャビティ面と、溶融金属が凝固し
て成る鋳物との間に隙間が形成され、ノズルの先端開口
部がその隙間を介して外気に連通された後、ピストンを
上昇端まで上昇させてノズルに吸引作用を働かせ、ノズ
ル内の溶融金属を吸い出して保持炉内に回収し、その
後、金型を開いて鋳物を取り出すのが一般的である。By the way, in the method of casting a casting using the mold casting machine described above, the piston is lowered to inject the molten metal in the holding furnace into the mold under pressure, and the injected molten metal solidifies and slightly shrinks. A gap is formed between the cavity surface of the mold and the casting formed by solidification of the molten metal.After the tip opening of the nozzle is communicated with the outside air through the gap, the piston is raised to the rising end. It is general that the suction action is exerted on the nozzle to suck out the molten metal in the nozzle and collect it in the holding furnace, and then open the mold to take out the casting.
一方、溶融低融点合金は凝固時に若干膨張する性質が
あるため、金型に注入された溶融低融点合金が凝固して
鋳物になっても、該鋳物とキャビティ面との間に隙間が
形成されることはない。したがって、上記の金型鋳造機
を用いて低融点合金鋳物を鋳造する際に、従来方法のよ
うに、溶融低融点合金をピストンをもって金型に加圧注
入し、注入された溶融低融点合金の凝固後、ピストンを
上昇端まで上昇させてノズル内の溶融低融点合金を保持
炉内に吸引回収しようとしても、ノズルの先端開口部が
外気と連通されていないため、シリンダ内におけるピス
トンの下部空間が負圧状態になった後、この下部空間内
に保持炉内の溶融低融点合金が吸い込まれて満され、そ
れに伴ないノズル内の溶融低融点合金の全部を吸引回収
することができず、その結果、金型を開いた時、ノズル
内に残留していた溶融低融点合金の一部が、金型の注入
口あるいは外部に流出して次回の鋳造作業に悪影響を及
ぼすなどの問題があった。On the other hand, since the molten low-melting point alloy has the property of slightly expanding during solidification, even if the molten low-melting point alloy injected into the mold is solidified into a casting, a gap is formed between the casting and the cavity surface. There is no such thing. Therefore, when casting a low melting point alloy casting using the above mold casting machine, as in the conventional method, the molten low melting point alloy is pressurized and injected into the mold with a piston, and the injected molten low melting point alloy is cast. After solidification, the piston is raised to the rising end and the molten low-melting point alloy in the nozzle is sucked and collected in the holding furnace. However, since the opening at the tip of the nozzle is not communicated with the outside air, the lower space of the piston in the cylinder is After being in a negative pressure state, the molten low melting point alloy in the holding furnace is sucked and filled in this lower space, and accordingly, all of the molten low melting point alloy in the nozzle cannot be sucked and recovered, As a result, when the mold is opened, there is a problem that a part of the molten low melting point alloy remaining in the nozzle flows out of the mold inlet or outside and adversely affects the next casting operation. It was
本発明は、上記の問題を解消するためになされたもの
である。The present invention has been made to solve the above problem.
(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の金型鋳造法におい
ては、保持炉内の溶融低融点合金をピストンの下降によ
り金型に加圧注入し、注入された溶融低融点合金が凝固
した後、ピストンを若干上昇させ、その後引き続きピス
トンを上昇させながら前記金型を開いてノズルに吸引作
用を働かせ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 mold casting method of the present invention, the molten low melting point alloy in the holding furnace is injected under pressure into the mold by lowering the piston and injected. After the molten low-melting-point alloy is solidified, the piston is raised slightly, and then the piston is raised while the die is opened to exert a suction action on the nozzle.
(作 用) 金型に注入された溶融低融点合金が凝固した後、ピス
トンを若干上昇させてシリンダ内を若干負圧状態にし、
その後、引き続きピストンを上昇させながら前記金型を
開き、これにより、ノズル先端を外気に解放しノズルに
十分に吸引作用を働らかせてノズル内の溶融低融点合金
を吸い出すことができる。(Operation) After the molten low-melting alloy injected into the mold has solidified, raise the piston slightly to make the inside of the cylinder a slightly negative pressure,
Then, the die is opened while continuing to raise the piston, whereby the tip of the nozzle is released to the outside air and the suction action is sufficiently exerted on the nozzle so that the molten low melting point alloy in the nozzle can be sucked out.
(実施例) 実施例について図面を参照して説明すると、機台
(1)上の左側には金型開閉機(2)が設置されてお
り、該金型開閉機(2)は、固定金型(3)を取り付け
た固定ダイベース(4)と、該固定ダイベース(4)と
対向して固設された固定ベース(5)と、固定ダイベー
ス(4)と固定ベース(5)との間に架設されたタイバ
ー(6)(6)と、該タイバー(6)(6)に左右摺動
自在に装架された可動金型(7)取付用可動ダイベース
(8)と、固定ベース(5)に装着されて可動ダイベー
ス(8)を左右に往復動させる横向きシリンダ(9)と
で構成されている。また、前記機台(1)上の右側に
は、溶融低融点合金(M)を貯留した保持炉(10)が設
置され、該保持炉(10)内には、有底円筒状を成しかつ
上部に供給孔(11)を、また下部に吐出口(12)をそれ
ぞれ穿設した上下方向に指向するシリンダ(13)が、溶
融低融点合金(M)内に埋没された状態で設けられてい
る。また、該シリンダ(13)内には、下向きのシリンダ
(14)を介して昇降するピストン(15)が、上下摺動可
能に嵌合されており、前記シリンダ(13)の吐出口(1
2)はノズル(16)を介して前記固定金型(3)の注入
口(3a)に連通接続されている。また、シリンダ
(9)、(14)は、電磁式方向切換弁(17)、(18)を
それぞれ介して油圧ユニット(図示せず)に連通接続さ
れており、該電磁式方向切換弁(17)、(18)は制御盤
(19)に電気的に接続されている。(Example) Explaining an example with reference to the drawings, a mold opening / closing machine (2) is installed on the left side of a machine base (1), and the mold opening / closing machine (2) is a fixed metal mold. Between the fixed die base (4) to which the mold (3) is attached, the fixed base (5) fixed to face the fixed die base (4), and between the fixed die base (4) and the fixed base (5). A tie bar (6) (6) provided, a movable die (7) mounted on the tie bar (6) (6) so as to be slidable left and right, a movable die base (8) for attachment, and a fixed base (5). And a horizontal cylinder (9) for reciprocating the movable die base (8) left and right. Further, a holding furnace (10) storing the molten low melting point alloy (M) is installed on the right side of the machine base (1), and the holding furnace (10) has a bottomed cylindrical shape. A vertically oriented cylinder (13) having a supply hole (11) in the upper part and a discharge port (12) in the lower part is provided in a state of being buried in the molten low melting point alloy (M). ing. A piston (15) that moves up and down through a downward cylinder (14) is fitted in the cylinder (13) so as to be slidable up and down, and the discharge port (1) of the cylinder (13) is
2) is connected to an injection port (3a) of the fixed mold (3) through a nozzle (16). The cylinders (9) and (14) are connected to a hydraulic unit (not shown) via electromagnetic directional control valves (17) and (18), respectively. ) And (18) are electrically connected to the control panel (19).
次にこのように構成された装置を用いて、低融点合金
鋳物の鋳造の手順について述べると、図示する状態から
電磁式方向切換弁(18)を切り換えてシリンダ(14)を
伸長作動させ、ピストン(15)を下降させて保持炉(1
0)内の溶融低融点合金(M)を、ノズル(16)から押
し出し固定金型(3)と可動金型(11)とで画成された
キャビティ(C)内に加圧注入する。キャビティ(C)
内に注入された溶融低融点合金(M)が凝固した後、電
磁式方向切換弁(18)の切換えによりシリンダ(14)を
収縮作動させてピストン(15)の上昇を開始し、該ピス
トン(15)が若干上昇した時に、引き続きピストン(1
5)を上昇させながら、電磁式方向切換弁(17)を切り
換えてシリンダ(9)を収縮作動し、可動金型(7)を
可動ダイベース(8)を介して左方へ移動させ、いわゆ
る金型を開く。すると、ピストン(15)の若干の上昇に
より、ノズル(16)には小さい吸引作用が働き、その
後、ピストン(15)の上昇の下に可動金型(7)が左方
へ移動されて固定金型(3)の注入口(3a)が空にさ
れ、ノズル(16)の先端開口部が開放される。この結
果、ノズル(16)に大きな吸引作用が働き、ノズル(1
6)内に残留している溶融低融点合金(M)は、ピスト
ン(15)の上昇に伴ってノズル(16)内から吸い出され
てシリンダ(13)内に回収される。そして、ピストン
(15)はシリンダ(13)の供給孔(11)の上方位置まで
上昇されて停止され、これにより、溶融低融点合金
(M)が供給孔(11)からシリンダ(13)内に流入す
る。こうして、可動金型(7)を左方端まで移動させた
後、溶融低融点合金(M)が凝固して成る鋳物製品を可
動金型(7)から取り出し、続いて、電磁式方向切換弁
(17)の切換えによりシリンダ(9)を伸長作動させ、
可動金型(7)を右方へ移動させていわゆる金型を閉
じ、一サイクルを終了する。Next, the procedure of casting low melting point alloy castings will be described using the apparatus configured as described above. The electromagnetic directional control valve (18) is switched from the state shown in the figure to extend the cylinder (14), and the piston Lower the holding furnace (1)
The molten low melting point alloy (M) in 0) is extruded from the nozzle (16) and injected under pressure into the cavity (C) defined by the fixed mold (3) and the movable mold (11). Cavity (C)
After the molten low melting point alloy (M) injected into the inside is solidified, the cylinder (14) is contracted by the switching of the electromagnetic directional control valve (18), and the piston (15) starts to rise. 15), the piston (1
While raising 5), the electromagnetic directional control valve (17) is switched and the cylinder (9) is contracted to move the movable die (7) to the left through the movable die base (8). Open the mold. Then, due to the slight rise of the piston (15), a small suction action is exerted on the nozzle (16), and then the movable die (7) is moved to the left under the rise of the piston (15) to move the fixed die. The injection port (3a) of the mold (3) is emptied, and the tip opening of the nozzle (16) is opened. As a result, a large suction action acts on the nozzle (16), and the nozzle (1
The molten low melting point alloy (M) remaining in 6) is sucked out of the nozzle (16) with the rise of the piston (15) and collected in the cylinder (13). Then, the piston (15) is lifted up to a position above the supply hole (11) of the cylinder (13) and stopped, whereby the molten low melting point alloy (M) is introduced into the cylinder (13) from the supply hole (11). Inflow. Thus, after moving the movable mold (7) to the left end, the casting product formed by solidifying the molten low melting point alloy (M) is taken out from the movable mold (7), and subsequently, the electromagnetic directional control valve. The cylinder (9) is extended by the switching of (17),
The movable mold (7) is moved rightward to close the so-called mold, and one cycle is completed.
(発明の効果) 以上の説明からも明らかなように本発明は、金型に注
入した溶融低融点合金の凝固後、ピストンを若干上昇さ
せ、その後引き続きピストンを上昇させながら金型を開
くようにしたから、ノズルの先端開口部が開放されてノ
ズルに大きな吸引作用が働き、ノズル内に残留している
溶融低融点合金の全部を適確にノズルから吸い出して保
持炉内に回収することができる効果を奏する。(Effects of the Invention) As is clear from the above description, the present invention is configured such that after solidification of the molten low melting point alloy injected into the mold, the piston is slightly raised, and then the die is opened while the piston is further raised. As a result, the opening at the tip of the nozzle is opened, and a large suction action acts on the nozzle, so that all of the molten low-melting point alloy remaining in the nozzle can be properly sucked out of the nozzle and collected in the holding furnace. Produce an effect.
図面は本発明の一実施に用いる金型鋳造設備の一部断面
正面図である。 (3):固定金型、(7):可動金型 (10):保持炉、(13):シリンダ (15):ピストン、(16):ノズル (19):制御盤The drawing is a partial cross-sectional front view of a mold casting facility used for carrying out the present invention. (3): Fixed mold, (7): Movable mold (10): Holding furnace, (13): Cylinder (15): Piston, (16): Nozzle (19): Control panel
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭57−47566(JP,A) ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-57-47566 (JP, A)
Claims (1)
ピストンおよびノズルを介し金型に加圧注入して低融点
合金鋳物を製造するようにした低融点合金鋳物の金型鋳
造法において、 前記保持炉内の溶融低融点合金を前記ピストンの下降に
より前記金型に加圧注入し、注入された溶融低融点合金
が凝固した後、前記ピストンを若干上昇させて前記シリ
ンダ内を若干負圧状態にし、その後引き続きピストンを
上昇させながら前記金型を開きもって前記ノズルに吸引
作用が及ぶようにしたことを特徴とする低融点合金鋳物
の金型鋳造法。The molten low melting point alloy in a holding furnace is supplied to a cylinder
In a die casting method of a low-melting alloy casting in which a low-melting alloy casting is manufactured by pressurizing and injecting into a die through a piston and a nozzle, the molten low-melting alloy in the holding furnace is lowered by lowering the piston. Pressurized injection into the mold, after the injected molten low melting point alloy solidifies, raise the piston slightly to make the inside of the cylinder a slightly negative pressure state, then open the mold while continuing to raise the piston A die casting method for a low melting point alloy casting, wherein a suction action is applied to the nozzle.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1312898A JP2668586B2 (en) | 1989-11-30 | 1989-11-30 | Mold casting method for low melting point alloy castings |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1312898A JP2668586B2 (en) | 1989-11-30 | 1989-11-30 | Mold casting method for low melting point alloy castings |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH03174963A JPH03174963A (en) | 1991-07-30 |
JP2668586B2 true JP2668586B2 (en) | 1997-10-27 |
Family
ID=18034785
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1312898A Expired - Fee Related JP2668586B2 (en) | 1989-11-30 | 1989-11-30 | Mold casting method for low melting point alloy castings |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2668586B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115771244B (en) * | 2023-02-13 | 2023-04-07 | 广州市迅兴精密工业有限公司 | Casting mould is used in processing of car plastic parts |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5747566A (en) * | 1980-09-03 | 1982-03-18 | Toshiba Mach Co Ltd | Injection pump for hot chamber type die casting |
-
1989
- 1989-11-30 JP JP1312898A patent/JP2668586B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH03174963A (en) | 1991-07-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US2181157A (en) | Method and apparatus for pressure casting | |
US4519436A (en) | Method for injecting molten metal in vertical diecasting machine | |
JPH02155557A (en) | Pressure casting device | |
CN106735086A (en) | A kind of casting device | |
JP2668586B2 (en) | Mold casting method for low melting point alloy castings | |
CN110548854B (en) | Forging control method for metal product | |
JPH0242292B2 (en) | ||
JPH0421632Y2 (en) | ||
JP2649597B2 (en) | Degassing method of vertical die casting machine | |
EP0670758B1 (en) | Cold chamber die casting machine injection system | |
US5787962A (en) | Cold chamber die casting casting machine and method | |
JPH0451261B2 (en) | ||
CN211866538U (en) | Hydraulic valve frame core mould | |
JP2593110B2 (en) | Method and apparatus for canceling mold injection force output in mold injection molding machine | |
CN218574914U (en) | Machine for casting aluminum piston blank by turning 180 degrees | |
JP2571455B2 (en) | Method of preventing air vent clogging of die for vertical die casting machine and structure for preventing clogging | |
JPS5855166A (en) | Method and device for casting | |
CN207043303U (en) | A kind of metal die-casting mold | |
JPS6076265A (en) | Discharging and feeding device for die | |
JPS61150763A (en) | Flash removing method of vacuum valve unit | |
JPH0749145B2 (en) | Injection controller for vertical die cast machine | |
JPH01215451A (en) | Diecast casting device and molten metal impurity removing method | |
JPH02307661A (en) | Method for filling up molten metal in vertical type die casting machine | |
JPS5834222B2 (en) | Vertical die casting equipment | |
JPS5930364U (en) | Vertical die casting equipment |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
LAPS | Cancellation because of no payment of annual fees |