JP2700032B2 - Mold casting method - Google Patents
Mold casting methodInfo
- Publication number
- JP2700032B2 JP2700032B2 JP1011145A JP1114589A JP2700032B2 JP 2700032 B2 JP2700032 B2 JP 2700032B2 JP 1011145 A JP1011145 A JP 1011145A JP 1114589 A JP1114589 A JP 1114589A JP 2700032 B2 JP2700032 B2 JP 2700032B2
- Authority
- JP
- Japan
- Prior art keywords
- cavity
- molten metal
- casting
- heat insulating
- runner
- 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
Description
【発明の詳細な説明】 〈産業上の利用分野〉 本発明は、低圧鋳造や重力鋳造等のように、アルミニ
ウム合金やマグネシウム合金等の溶湯を注入用湯道を通
してキャビティ内に供給充満させて鋳造する金型鋳造法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a casting method in which a molten metal such as an aluminum alloy or a magnesium alloy is supplied and filled into a cavity through a casting runner, as in low pressure casting or gravity casting. The present invention relates to a die casting method.
〈従来の技術及びその問題点〉 金型を用いて製造する金型鋳造法としては、ダイカス
ト鋳造法や低圧鋳造法，重力鋳造法等が一般的に知られ
ている。<Prior art and its problems> Die casting, low pressure casting, gravity casting, and the like are generally known as mold casting methods using a mold.
ダイカスト鋳造法では、射出スリーブ内に注湯した溶
湯をキャビティ内に射出プランジャでもって高圧高速で
射出するので、溶湯がキャビティ内に充填される際に空
気や含有ガスを巻込んで鋳巣などの内部欠陥を生じやす
い不具合がある。In the die casting method, the molten metal poured into the injection sleeve is injected into the cavity at high pressure and high speed by the injection plunger. There are defects that easily cause internal defects.
また、低圧鋳造法や重力鋳造法では、溶湯をキャビテ
ィ内に低圧で直接注湯して鋳造するため、ダイカスト鋳
造法のように空気やガス等の巻込みはなくなる反面、凝
固収縮に伴う引け巣の発生を防止することはできず、し
かも鋳造できる製品の形状や肉厚などに制約が多いと同
時に生産性も悪い不具合がある。In low-pressure casting and gravity casting, the molten metal is poured directly into the cavity at low pressure and cast. Therefore, unlike the die-casting method, air and gas are not entrained, but shrinkage cavities due to solidification shrinkage are eliminated. Cannot be prevented, and there are many restrictions on the shape and thickness of a product that can be cast, and the productivity is poor.
〈発明が解決しようとする課題〉 本発明はこの様な従来の不具合に鑑みてなされたもの
であり、溶湯を注入用湯道を通してキャビティ内に供給
充満させて鋳造する金型鋳造法において、引け巣等の内
部欠陥の少ない高品質の鋳造品をダイカスト鋳造法のよ
うに生産性良く鋳造することが可能な金型鋳造法を提供
せんとするものである。<Problems to be Solved by the Invention> The present invention has been made in view of such a conventional problem. In a mold casting method in which a molten metal is supplied and filled into a cavity through an injection runner and cast, a shrinkage occurs. It is an object of the present invention to provide a mold casting method capable of casting a high-quality casting having few internal defects such as nests with high productivity like a die casting method.
〈課題を解決するための手段〉 斯る目的を達成する本発明の金型鋳造法は、注入用湯
道を通してキャビティ内に溶湯を供給充満させた後に上
記注入用湯道を閉鎖し、その状態でもってキャビティ内
に充満された溶湯に高圧を加えながら当該溶湯を凝固さ
せるようにした金型鋳造法であって、キャビティ内に溶
湯を供給するのに先立ちキャビティ表面及び前記注入用
湯道に紛状断熱剤を塗布して断熱層を形成せしめ、キャ
ビティ内に充填された溶湯に高圧を加えることにより上
記断熱層が薄くなってキャビティ内の溶湯が当該断熱層
からしみ出てキャビティ表面に接触して凝固することを
特徴としたものである。<Means for Solving the Problems> The mold casting method of the present invention for achieving the object is to supply and fill a molten metal into a cavity through an injection runner, then close the injection runner, This is a mold casting method in which the molten metal solidified in the cavity is solidified while applying a high pressure to the molten metal. Before the molten metal is supplied into the cavity, powder is applied to the surface of the cavity and to the casting runner. A heat insulating agent is applied to form a heat insulating layer, and by applying a high pressure to the molten metal filled in the cavity, the heat insulating layer is thinned and the molten metal in the cavity exudes from the heat insulating layer and contacts the cavity surface. It is characterized by solidification.
〈実施例〉 以下、本発明に係る金型鋳造法を、図面を参照しなが
ら説明する。<Example> Hereinafter, a mold casting method according to the present invention will be described with reference to the drawings.
図中、Ａは本金型鋳造法を実施するための鋳造装置の
一実施例を示し、固定プラテンa1に取付けられた固定型
１と可動プラテンa2に取付けられた可動型２の型合せ下
部に鋳込口４が形成され、その鋳込口４には本装置Ａの
下部に配置した保持炉Ｂ内に収容された溶湯ｍを導入す
るためのストーク３を接続させ、金型1,2の型締め後に
エアーバルブc1を開弁させて圧縮空気発生装置Ｃから保
持炉Ｂの格納室B1内に圧縮空気を送ることにより保持炉
Ｂ内の溶湯ｍ面に圧力を加えて、保持炉Ｂの溶湯ｍを層
流限界内でストーク３から注入用湯道７を通してキャビ
ティ５内に供給充満させるように構成されている。Figure, A represents a illustrates an embodiment of a casting apparatus for carrying out the Honkin casting method, a fixed platen a 1 in attached fixed mold 1 and the movable platen a 2 in mounted type combined the movable mold 2 A casting port 4 is formed at a lower portion, and a stalk 3 for introducing a molten metal m stored in a holding furnace B disposed at a lower portion of the apparatus A is connected to the casting port 4. applying pressure to the molten metal m-plane of the holding furnace B by sending the compressed air in the storage chamber B within the first holding furnace B from after two clamping by opening the air valve c 1 by the compressed air generator C, The molten metal m in the holding furnace B is supplied and filled from the stalk 3 into the cavity 5 through the injection runner 7 within the laminar flow limit.
図中６は、溶湯ｍが保持炉Ｂからキャビティ５内に供
給充満された後に、鋳込口４とキャビティ５の間に形成
される注入用湯道７を閉鎖するための湯道開閉機構であ
り、固定型１内に注入用湯道７へ向けて摺動自在に組込
まれた湯道構成ブロック6aと、この湯通構成ブロック6a
にロッド6bを介して連結され固定プラテンa1に組込まれ
た油圧又はエアーシリンダ6cから構成され、鋳造装置Ａ
の鋳造サイクルに連動させて湯道構成ブロック6aを前進
・後退させて注入用湯道７を開閉するように鋳造装置Ａ
の鋳造制御部に連繋されている。6 is a runner opening / closing mechanism for closing the pouring runner 7 formed between the casting port 4 and the cavity 5 after the molten metal m is supplied and filled into the cavity 5 from the holding furnace B. A runner building block 6a slidably assembled in the fixed mold 1 toward the pouring runner 7;
It consists hydraulic or air cylinder 6c are coupled incorporated in the fixed platen a 1 through the rod 6b, the casting apparatus A
The casting apparatus A is configured to open and close the pouring runner 7 by moving the runner forming block 6a forward and backward in conjunction with the casting cycle of
Is linked to the casting control unit.
また図中８は、上記湯道開閉機構６の湯道構成ブロッ
ク6aで注入用湯道７が閉鎖された後に、キャビティ５内
に充満された溶湯ｍに高圧を加えるための溶湯加圧機構
であり、固定型１にキャビティ５と連通するように形成
された挿通孔９内に摺動自在に装備せしめた加圧ピン8a
と、この加圧ピン8aを前進・後退動作させるための油圧
又はエアーシリンダ8bから構成されている。In the figure, reference numeral 8 denotes a molten metal pressurizing mechanism for applying a high pressure to the molten metal m filled in the cavity 5 after the injection molten metal 7 is closed by the molten metal component block 6a of the above-mentioned molten metal opening / closing mechanism 6. A pressurizing pin 8a slidably provided in an insertion hole 9 formed in the fixed die 1 so as to communicate with the cavity 5;
And a hydraulic or air cylinder 8b for moving the pressure pin 8a forward and backward.
そして本金型鋳造法にあっては、キャビティ５内に溶
湯ｍを供給するのに先立って金型1,2の型開き時に、キ
ャビティ５表面及び注入用湯道７に紛状断熱剤を塗布し
て断熱層10を形成せしめる。In this mold casting method, a powdery heat insulating agent is applied to the surface of the cavity 5 and the injection runner 7 when the molds 1 and 2 are opened before supplying the molten metal m into the cavity 5. Then, the heat insulating layer 10 is formed.
本金型鋳造法に用いる粉状断熱剤としては、溶湯ｍと
非反応性の粉体、詳しくは例えばボロンや滑石等の帯電
性を有する粉体、或いは金属酸化物や金属硫化物，金属
チッ化物等の粉体、又はこれら粉体に樹脂粉を混合させ
た粉体など、キャビティ表面からの鋳物Ｍの離型性、即
ち離型剤としての機能を兼ね備えたものが好ましい。粉
状断熱剤は、キャビティ５内に溶湯ｍを供給する前の金
型1,2の型開き時に、キャビティ５の表面及び注入用湯
道７に静電塗布法など所望な塗布法によって１鋳造サイ
クル動作毎に塗布して、キャビティ５の表面及び注入用
湯道７に断熱層10を形成せしめる。As the powder heat insulating agent used in the present mold casting method, a powder that is non-reactive with the molten metal m, for example, a powder having a charging property such as boron or talc, a metal oxide, a metal sulfide, or a metal chip is used. It is preferable to use a powder having a function of releasing the casting M from the cavity surface, that is, a function as a release agent, such as a powder of a compound or a powder obtained by mixing a resin powder with the powder. When the molds 1 and 2 are opened before the molten metal m is supplied into the cavity 5, the powdered heat insulating agent is cast on the surface of the cavity 5 and the injection runner 7 by a desired coating method such as an electrostatic coating method. The heat insulating layer 10 is applied every cycle operation to form a heat insulating layer 10 on the surface of the cavity 5 and the runner 7 for pouring.
この断熱層10は、注入用湯道７を通ってキャビティ５
内に供給される溶湯ｍが途中で温度低下による凝固を起
すことなく良好な湯流れを維持し得るような保温作用を
有し、且つキャビティ５内に充填された溶湯ｍに高圧を
加えることにより薄くなってキャビティ５内の溶湯ｍが
当該断熱層10からしみ出てキャビティ５表面に接触し、
それによってキャビティ５内の溶湯ｍが高圧下で凝固
し、断熱層10は最終的に消滅する。The heat insulating layer 10 passes through the injection runner 7 and passes through the cavity 5.
The molten metal m supplied into the cavity 5 has a heat retaining action such that a good molten metal flow can be maintained without causing solidification due to a temperature drop on the way, and by applying high pressure to the molten metal m filled in the cavity 5 The molten metal m in the cavity 5 oozes out from the heat insulating layer 10 and comes into contact with the surface of the cavity 5,
Thereby, the molten metal m in the cavity 5 solidifies under high pressure, and the heat insulating layer 10 finally disappears.
而して、以上の如く構成した本実施例鋳造装置Ａで鋳
物Ｍを鋳造する場合には、金型1,2の型開き時にキャビ
ティ５表面及び注入用湯道７に粉状断熱剤を塗布して断
熱層10を形成せしめた後、型締めする（第１図の状
態）。次に、保持炉Ｂからストーク３を通して溶湯ｍを
キャビティ５内に供給し充満させた（第２図の状態）
後、湯道開閉機構６の湯道構成ブロック6aを前進動作さ
せて注入用湯道７を閉鎖さしめる（第３図の状態）。Thus, when casting M is cast by the casting apparatus A of the present embodiment configured as described above, a powdery heat insulating agent is applied to the surface of the cavity 5 and the injection runner 7 when the molds 1 and 2 are opened. After forming the heat insulating layer 10, the mold is clamped (the state of FIG. 1). Next, the molten metal m was supplied from the holding furnace B through the stalk 3 into the cavity 5 and filled therein (the state shown in FIG. 2).
Thereafter, the runner forming block 6a of the runner opening and closing mechanism 6 is moved forward to close the runner 7 for injection (the state of FIG. 3).
そしてこの状態でもって、溶湯加圧機構８の加圧ピン
8aを前進動作させることにより、キャビティ５内に充満
された溶湯ｍに高圧を加える（第４図の状態）。する
と、キャビティ５の表面に塗布形成された断熱層10が押
し潰されて薄くなり、その結果、キャビティ５内の溶湯
ｍは断熱層10からしみ出てキャビティ５表面に接触し、
高圧下で凝固し鋳物Ｍとなる。In this state, the pressing pin of the molten metal pressing mechanism 8
By causing the 8a to move forward, high pressure is applied to the molten metal m filled in the cavity 5 (the state shown in FIG. 4). Then, the heat insulating layer 10 formed on the surface of the cavity 5 is crushed and thinned. As a result, the molten metal m in the cavity 5 exudes from the heat insulating layer 10 and comes into contact with the surface of the cavity 5,
It solidifies under high pressure to form a casting M.
溶湯ｍが凝固した後、金型1,2を型開きし（第５図の
状態）、製品押出し機構Ｄでもって鋳物Ｍを押し出すと
同時又は金型1,2の型締め動作時に湯道開閉機構６の湯
道構成ブロック6aと溶湯加圧機構８の加圧ピン8aを後退
動作させる（第６図の状態）。After the molten metal m has solidified, the dies 1 and 2 are opened (the state shown in FIG. 5), and when the casting M is extruded by the product extruding mechanism D, the runners are opened and closed at the same time or when the dies 1 and 2 are clamped. The runner forming block 6a of the mechanism 6 and the pressurizing pin 8a of the molten metal pressurizing mechanism 8 are moved backward (the state of FIG. 6).
以後、上記動作を繰り返して鋳物Ｍを鋳造するもので
ある。Thereafter, the above operation is repeated to cast the casting M.
尚、本実施例の鋳造装置によれば、キャビティ５内に
溶湯ｍが充満された時点で注入用湯道７を湯道開閉機構
６で閉鎖してしまうので、キャビティ５内とストーク３
内とを遮断分離させることができ、よって注入用湯道７
を閉鎖すると同時にストーク３内に充満している溶湯ｍ
を保持炉Ｂに戻して次の鋳造ショットに備えることがで
きる。従って、回転テーブル上に、ストーク３の上端部
を抜き差し自在又は気密接離動自在に接続し得る鋳込口
構造を備えた低圧鋳造用の金型を複数個設置すると共
に、回転テーブルの下方に保持炉Ｂを設置せしめ、回転
テーブルの間欠動作により各金型を順次保持炉Ｂの真上
に移動停止させてストーク３内を通して各金型のキャビ
ティ内に溶湯を充満せしめるといった重力鋳造の鋳造技
術を低圧鋳造に応用して、鋳物を連続鋳造することが可
能になる。According to the casting apparatus of the present embodiment, the casting runner 7 is closed by the runner opening / closing mechanism 6 when the cavity 5 is filled with the molten metal m.
The inside can be cut off and separated, so that the injection runner 7
Is closed and at the same time the molten metal in Stoke 3 is filled.
Can be returned to the holding furnace B to prepare for the next casting shot. Accordingly, a plurality of low-pressure casting dies having a pouring opening structure capable of connecting the upper end of the stalk 3 so that it can be freely inserted and removed or airtightly separated and moved can be installed on the rotary table, and beneath the rotary table. A casting technique of gravity casting in which the holding furnace B is installed, and each mold is sequentially stopped immediately above the holding furnace B by an intermittent operation of the rotary table, and the molten metal is filled in the cavity of each mold through the stalk 3. Can be applied to low pressure casting to continuously cast a casting.
〈発明の効果〉 本発明の金型鋳造装置は叙上の如く構成してなるか
ら、下記の作用効果を奏する。<Effects of the Invention> Since the mold casting apparatus of the present invention is configured as described above, the following effects are obtained.
金型のキャビティ表面及び注入用湯道に粉状断熱剤
を塗布して断熱層を形成せしめ、然る後上記注入用湯道
を通してキャビティ内に溶湯を供給充満させるようにし
たので、キャビティ内に溶湯を供給充満させる際に、溶
湯が注入用湯道やキャビティ表面に直接接触することが
なく、加えて粉状断熱剤による断熱層が持つ断熱保温作
用が相乗して、キャビティ内に充満した溶湯の急速な凝
固を抑制することが出来る。従って、湯廻りが良好とな
り且つ焼き付けがなくなり、複雑な形状をした鋳造品や
薄肉の鋳造品でも安心して鋳造することが出来ると共
に、鋳肌の良好な欠陥の少ない鋳物を鋳造することが出
来る。The powdery heat insulating agent was applied to the cavity surface of the mold and the casting runner to form a heat insulating layer, and then the molten metal was supplied and filled into the cavity through the casting runner. When the molten metal is supplied and filled, the molten metal does not come into direct contact with the pouring runner or the cavity surface, and in addition, the heat insulation effect of the heat insulating layer of the powdered heat insulating agent is synergistic, so that the molten metal filled in the cavity. Rapid coagulation can be suppressed. Therefore, the flow of the molten metal becomes good and the baking is eliminated, so that a casting having a complicated shape or a thin-walled casting can be cast with confidence, and a casting with good casting surface and few defects can be cast.
粉状断熱剤による断熱層の存在によってキャビティ
表面及び注入用湯道の急激な温度衝撃を和らげることが
できるので、金型の寿命を大幅に延ばすことが可能とな
る キャビティ内に注入用湯道を通して溶湯を充満させ
た後、注入用湯道を閉鎖せしめてキャビティの内と外と
を遮断分離するようにしたので、溶湯をキャビティ内に
供給充満させた直後にその溶湯に高圧を加えても溶湯の
一部がキャビティ外に流出するようなことが全くない。
従って、キャビティ内に供給充満された溶湯に対して、
その凝固開始直前に効果的に高圧を加えることが可能と
なる。The presence of the heat insulating layer made of the powdered heat insulating agent can relieve the sudden temperature shock of the cavity surface and the casting runner, so that the life of the mold can be greatly extended. After filling the molten metal, the injection runner was closed to isolate and separate the inside and outside of the cavity, so even if high pressure is applied to the molten metal immediately after the molten metal is supplied and filled into the cavity, Does not flow out of the cavity at all.
Therefore, for the molten metal supplied and filled in the cavity,
Immediately before the start of coagulation, high pressure can be effectively applied.
キャビティ内に充満された溶湯は、該溶湯に高圧を
加えることによりキャビティ表面に形成された粉状断熱
剤による断熱層が押し潰されて薄くなって断熱層からし
み出して、キャビティ表面に接触して凝固するので、ダ
イカスト鋳造法と同程度の緻密な鋳造品を寸法精度良く
且つ生産性良く鋳造することが可能となる。When the molten metal filled in the cavity is applied with high pressure to the molten metal, the heat insulating layer formed by the powdery heat insulating agent formed on the surface of the cavity is crushed and thinned, exuding from the heat insulating layer, and coming into contact with the cavity surface. Because of the solidification, it is possible to cast a dense casting with the same dimensional accuracy and productivity as the die casting method.
図面は本発明金型鋳造法を実施する装置の一例を示し、
第１図は型締め状態を示す断面図で一部を省略して示
す、第２図は同溶湯の充填中を示す断面図、第３図は同
湯道を閉鎖した状態を示す断面図、第４図は同溶湯に高
圧を加えた状態を示す断面図、第５図は同型開き状態を
示す断面図、第６図は同鋳物を押出し湯道構成ブロック
と加圧ピンを後退させた状態を示す断面図。 図中 Ａ……鋳造装置、Ｂ……保持炉 １……固定型、２……可動型 ３……ストーク、４……鋳込口 ５……キャビティ、６……湯道開閉機構 6a……湯道構成ブロック、７……注入用湯道 ８……溶湯加圧機構、8a……加圧ピンThe drawing shows an example of an apparatus for performing the mold casting method of the present invention,
FIG. 1 is a cross-sectional view showing a mold-clamped state, a part of which is omitted, FIG. 2 is a cross-sectional view showing that the molten metal is being filled, FIG. 3 is a cross-sectional view showing a state in which the molten metal is closed, FIG. 4 is a cross-sectional view showing a state in which high pressure is applied to the molten metal, FIG. 5 is a cross-sectional view showing an open state of the same mold, and FIG. 6 is a state in which the casting is extruded and a runner block and a pressure pin are retracted. FIG. In the figure, A: Casting device, B: Holding furnace 1: Fixed mold, 2: Movable mold 3, Stoke 4, Casting port 5: Cavity, 6: Runner opening / closing mechanism 6a ... Runner building block, 7 ... runner for pouring 8 ... molten metal pressurizing mechanism, 8a ... pressurizing pin
Claims (1)
供給充満させた後に上記注入用湯道を閉鎖し、その状態
でもってキャビティ内に充満された溶湯に高圧を加えな
がら当該溶湯を凝固させるようにした金型鋳造法であっ
て、キャビティ内に溶湯を供給するのに先立ちキャビテ
ィ表面及び前記注入用湯道に紛状断熱剤を塗布して断熱
層を形成せしめ、キャビティ内に充填された溶湯に高圧
を加えることにより上記断熱層が薄くなってキャビティ
内の溶湯が当該断熱層からしみ出てキャビティ表面に接
触して凝固することを特徴とする金型鋳造法。After the molten metal is supplied and filled into the cavity through the pouring runner, the pouring runner is closed, and in this state, the molten metal is solidified while applying high pressure to the molten metal filled in the cavity. In the mold casting method as described above, prior to supplying the molten metal into the cavity, a powdery heat insulating agent was applied to the surface of the cavity and the injection runner to form a heat insulating layer, and the cavity was filled. A mold casting method, wherein the heat insulating layer is thinned by applying a high pressure to the molten metal, and the molten metal in the cavity exudes from the heat insulating layer and contacts the surface of the cavity to be solidified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1011145A JP2700032B2 (en) | 1989-01-20 | 1989-01-20 | Mold casting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1011145A JP2700032B2 (en) | 1989-01-20 | 1989-01-20 | Mold casting method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02192869A JPH02192869A (en) | 1990-07-30 |
| JP2700032B2 true JP2700032B2 (en) | 1998-01-19 |
Family
ID=11769855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1011145A Expired - Lifetime JP2700032B2 (en) | 1989-01-20 | 1989-01-20 | Mold casting method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2700032B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19821419A1 (en) * | 1998-05-13 | 1999-11-18 | Georg Fischer Disa Ag | Process for increasing low pressure casting of metal, especially light metal |
| JP2008068315A (en) * | 2006-08-14 | 2008-03-27 | Fujino Gijutsu Consultant:Kk | Apparatus and method for die casting |
| JP6183272B2 (en) * | 2014-03-31 | 2017-08-23 | 宇部興産機械株式会社 | Casting apparatus and casting method |
| CN105234374A (en) * | 2015-11-11 | 2016-01-13 | 无锡清杨机械制造有限公司 | Magnesium alloy casting method |
| CN112692256A (en) * | 2021-01-20 | 2021-04-23 | 昆山六丰机械工业有限公司 | Method for combining local extrusion under low pressure casting |
| CN113275543B (en) * | 2021-05-25 | 2022-06-14 | 哈尔滨工业大学 | Counter-gravity filling cabin for large-size complex amorphous alloy component |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5120295B2 (en) * | 1972-04-11 | 1976-06-24 | ||
| JPS51131421A (en) * | 1975-05-12 | 1976-11-15 | Hitachi Ltd | Apparatus for melt forging |
| JPS588942B2 (en) * | 1975-07-31 | 1983-02-18 | トヨタ自動車株式会社 | Youto Tanzou Okonaiur Die Casting Kanagata Souchi |
| JPS5236525A (en) * | 1975-09-19 | 1977-03-19 | Nippon Keikinzoku Sougou Kenki | Apparatus for melt forging |
| JPS5737554U (en) * | 1980-08-08 | 1982-02-27 | ||
| JPS63108959A (en) * | 1986-10-27 | 1988-05-13 | Toshiba Mach Co Ltd | Method and device for vertical die casting |
-
1989
- 1989-01-20 JP JP1011145A patent/JP2700032B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02192869A (en) | 1990-07-30 |
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