JPH03230855A - Vacuum casting method in die casting - Google Patents
Vacuum casting method in die castingInfo
- Publication number
- JPH03230855A JPH03230855A JP2654790A JP2654790A JPH03230855A JP H03230855 A JPH03230855 A JP H03230855A JP 2654790 A JP2654790 A JP 2654790A JP 2654790 A JP2654790 A JP 2654790A JP H03230855 A JPH03230855 A JP H03230855A
- Authority
- JP
- Japan
- Prior art keywords
- runner
- boiling
- vacuum
- sleeve
- die casting
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000004512 die casting Methods 0.000 title claims description 11
- 238000005266 casting Methods 0.000 title claims description 8
- 238000009835 boiling Methods 0.000 claims abstract description 21
- 239000002184 metal Substances 0.000 claims abstract description 14
- 238000002347 injection Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims abstract description 7
- 238000013022 venting Methods 0.000 abstract description 8
- 230000003749 cleanliness Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000010687 lubricating oil Substances 0.000 description 6
- 230000013011 mating Effects 0.000 description 6
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/14—Machines with evacuated die cavity
- B22D17/145—Venting means therefor
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明はダイカストの真空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 vacuum die casting method.
従来、ダイカスト製品の中に含まれるガスの量を減少さ
せるための真空ダイカスト法には大別してガス抜きの溝
部の抵抗を大きくして溶湯の吹き出しを止める方式のマ
・シブベント法ト。Conventionally, vacuum die casting methods for reducing the amount of gas contained in die-cast products can be broadly divided into mechanical venting methods, which increase the resistance of the gas vent grooves to stop the molten metal from blowing out.
金型に真空バルブを装備して高速で射出された溶湯の慣
性力でパルプを閉じるクイ、クシャフト法とが存在する
溶湯がキャビティをほぼ充填し、金型のガス抜き先端部
に装備した真空パルプに到達するまでパルプを開いてキ
ャビティ内を真空吸引し続けることのできる後者のクイ
ックシャフト法の研究開発が盛んに行なわれている（例
えば特公昭５８−第４６３８６号公報参照）。There is a Kushaft method in which the mold is equipped with a vacuum valve and the inertia of the molten metal injected at high speed closes the pulp. Research and development of the latter quick shaft method, in which the pulp is opened and the inside of the cavity is continued to be vacuum-sucked, is being actively conducted (see, for example, Japanese Patent Publication No. 46386/1983).
従来のダイカストの真空鋳造法にあっては、キャビティ
及びスリーブ内を急速に高真空で吸引していたので、ピ
ストンスリーブ内にｍ付した潤滑油が急激な圧力降下に
より突沸して溶湯と混じり、溶湯の７００°Ｃもの高温
により分解して水素と炭素が発生し、これらが溶湯中に
混入しているから真空にしても分離ができず、従って水
素は巣の原因となり炭素は製品を黒く汚し湯じわの原因
となる。また、ピストンスリーブ内に給湯が行なわれる
と、ピストンスリーブ内の潤滑油に高温の溶湯が接触す
るために気化してこの気化ガスが温度の低い１５０〜２
００℃の湯道及びキャビティ内を通過時に凝縮し、この
凝縮している所に後進の７００℃と高温の溶湯が接触し
分解して水素を発生する為、巣の原因となる問題点を有
していた。In the conventional vacuum casting method for die casting, the inside of the cavity and sleeve are rapidly suctioned under high vacuum, so the lubricating oil inside the piston sleeve boils due to a sudden pressure drop and mixes with the molten metal. The molten metal decomposes due to its high temperature of 700°C and generates hydrogen and carbon.Since these are mixed in the molten metal, they cannot be separated even if a vacuum is applied.Therefore, the hydrogen causes cavities and the carbon stains the product black. Causes hot water wrinkles. Furthermore, when hot water is supplied into the piston sleeve, the high temperature molten metal comes into contact with the lubricating oil inside the piston sleeve and is vaporized.
When passing through the 00℃ runners and cavities, it condenses, and the 700℃ and high-temperature molten metal coming in contact with the condensed area decomposes and generates hydrogen, which can cause cavities. Was.
本発明はこれらの問題点を解決し、ピストンスリーブ内
及びキャピテイ湯道内で発生していた水素、炭素５等の
発生を抑止すると共に製品に影響しないように除去し、
巣の完全に無い製品が得られることを目的とする。The present invention solves these problems, suppresses the generation of hydrogen, carbon 5, etc. generated in the piston sleeve and the capitivity runner, and removes them so that they do not affect the product.
The aim is to obtain a product completely free of nests.
スリーブからキャビティに通じる湯道に沸騰遮断装置を
設け、湯道からガス抜き溝を枝設する。そして沸騰遮断
装置としてはピンを用い、また、湯道から枝設したガス
抜き溝中に差圧緩和隙間を設ける。また沸騰遮断装置は
、湯道を蛇行形成して抵抗湯道とする。また更に湯道か
ら枝設した前記ガス抜き溝に代えて湯溜めを設ける。A boiling cutoff device is installed in the runner that leads from the sleeve to the cavity, and a gas vent groove is installed from the runner. A pin is used as the boiling cutoff device, and a differential pressure relief gap is provided in the gas vent groove extending from the runner. In addition, the boil cutoff device forms a runner in a meandering manner to form a resistance runner. Furthermore, a hot water reservoir is provided in place of the gas vent groove branched from the runner.
湯道中に設けられた沸騰遮断装置が、キャビティ側とス
リーブ側とを遮断するため、高真空による急激な圧力低
下によって生じるスリーブ内の潤滑油の突沸を防止する
と共に、スリーブ内で高温の溶湯と接触することにより
発生した潤滑油の気化ガス、及びスリーブ内に給湯前よ
り存在する空気等をキャピテイを通さずに金型外に導出
する。The boiling cutoff device installed in the runner shuts off the cavity side and the sleeve side, which prevents the lubricating oil in the sleeve from boiling due to a sudden pressure drop due to high vacuum, and also prevents the high temperature molten metal in the sleeve from boiling. The vaporized gas of the lubricating oil generated by the contact and the air existing in the sleeve before the hot water supply are led out of the mold without passing through the cavity.
さらに、湯道から枝設したガス抜き溝中に差圧緩和隙間
を設けると、キャビティ側とガス抜き溝双方が同時に高
真空で吸引しても差圧緩和隙間が狭いから高真空でも突
沸する程の圧力の低下がない。Furthermore, if a differential pressure relief gap is provided in the gas vent groove branching from the runner, even if both the cavity side and the gas vent groove are simultaneously sucked under high vacuum, the differential pressure relief gap will be narrow enough to cause bumping even in high vacuum. There is no pressure drop.
また、沸騰遮断装置が蛇行形成した抵抗湯道である場合
には、抵抗湯道の略中間位置に溶射が到達するまでは抵
抗湯道の溶湯入口側の低真空系を突沸しない程度の低真
空で吸引し、その時点で低速で進行してきた射出用ピス
トンを停止させると同時に、キャビティ側の高真空系と
タイマーを作動させタイマーで真空時間を制御し、湯道
及びキャビティ内が完全に真空となった後に高速射出を
行なう。In addition, if the boiling cutoff device is a meandering resistance runner, the low vacuum system on the molten metal inlet side of the resistance runner should be kept under a low vacuum that does not cause bumping until the spray reaches the approximately middle position of the resistance runner. At that point, the injection piston, which had been advancing at low speed, is stopped, and at the same time, the high vacuum system and timer on the cavity side are activated, and the vacuum time is controlled by the timer, so that the runner and the inside of the cavity are completely vacuumed. After that, perform a high-speed injection.
実施例について図面を参照して説明すると、第１図〜第
３図において沸騰遮断ピン１は、湯道２のキャビティ３
とスリーブ４間に設けると共に、沸騰遮断ピン１は、合
わせ面と直角方向に滑動すべく遊嵌し、バネ５の圧力に
て湯道を常時閉塞すべく設けるガス抜き溝６は、前記沸
騰遮断ピン１の先端面７が接当する合わせ面８に、先端
面７の略半内部が接当閉塞する位置より湯道２と連通さ
せて横方向に曲折し、他の一端側を金型外に導出して窪
設する高真空ガス抜き溝９はキャピテイ３と一端を連通
し、他端側は金型外へ導出して設ける。Embodiments will be described with reference to the drawings. In FIGS. 1 to 3, the boil cutoff pin 1 is inserted into the cavity 3 of the runner 2.
The boiling cutoff pin 1 is loosely fitted to slide in the direction perpendicular to the mating surface, and the gas vent groove 6 is provided between the boiling cutoff pin 1 and the sleeve 4 to constantly close the runner under the pressure of the spring 5. The tip end surface 7 of the pin 1 contacts the mating surface 8, and the approximately half inside of the tip end surface 7 is brought into communication with the runner 2 from the position where it comes into contact with the mating surface 8 and is bent laterally, and the other end is placed outside the mold. A high-vacuum gas venting groove 9 which is led out and recessed has one end communicating with the cavity 3 and the other end leading out to the outside of the mold.
また、第４図〜第６図において、差圧緩和隙間１０は、
湯道２から枝設したガス抜き溝６の一部分を溝の底面１
１を高くして形成する。In addition, in FIGS. 4 to 6, the differential pressure relaxation gap 10 is
A part of the gas vent groove 6 branched from the runner 2 is connected to the bottom surface 1 of the groove.
1 is made higher.
第７図において圧動検知装置１２は、互いに直交し、且
つ、端部の斜面１３が斜め方向に滑動する一対の滑動板
１４．１４の一方を沸騰遮断ピン１に固着し、他方を金
型内に滑動自在に遊嵌して、高速射出用リミ・トスイ・
チ１５を添接検知させる。In FIG. 7, the pressure detection device 12 has a pair of sliding plates 14 and 14 that are orthogonal to each other and whose end slopes 13 slide in an oblique direction, one of which is fixed to the boiling cutoff pin 1, and the other is fixed to the mold. It can be slid freely into the inside of the rim, tosui, and
15 to detect attachment.
第８図において、抵抗湯道１６は、スリーブ４とキャピ
テイ３間に蛇行させて合わせ面に窪設する。さらに詳し
くは、抵抗湯道６のスリーブ側の端部から横方向にガス
抜き溝６を設けると共に抵抗湯道６内に正確に溶湯を一
時停止させるための低速から高速への切換用の兼用スイ
ッチ（図示せず）を設けることが望ましい。In FIG. 8, the resistance runner 16 is meandered between the sleeve 4 and the cavity 3 and recessed in the mating surface. More specifically, a gas venting groove 6 is provided in the lateral direction from the end of the resistance runner 6 on the sleeve side, and a dual-purpose switch is used to change from low speed to high speed in order to accurately temporarily stop the molten metal in the resistance runner 6. (not shown) is desirable.
第９図及び第１０図において、湯溜り１７を沸騰遮断ピ
ン１の先端面が接当する合わせ面の位置より横方向に窪
設する。In FIGS. 9 and 10, the hot water reservoir 17 is recessed laterally from the position of the mating surface where the tip end surface of the boiling cutoff pin 1 comes into contact.
側とスリーブ側とを遮断するために、高真空による急激
な圧力低下によって生じるスリーブ内の潤滑油の突沸を
防止すると共に、スリーブ内で高温の溶湯と接触するこ
とにより発生した潤滑油の気化ガス及びスリーブ内に給
湯前より存在する空気等をキャビティ内を通さずに確実
に金型外へ導出することが可能となるため、キャビティ
内は完全に清浄が保たれ、そこにガスを含まない純粋な
溶湯のみが充填され、巣の無い完全な製品が得られる。In order to isolate the side from the sleeve side, it prevents the lubricating oil from boiling inside the sleeve caused by the sudden pressure drop due to high vacuum, and also prevents the lubricating oil from vaporized gas from coming into contact with the high-temperature molten metal inside the sleeve. Also, the air that is present in the sleeve before the hot water is supplied can be reliably led out of the mold without passing through the cavity, so the inside of the cavity is kept completely clean and there is no gas in it. Only the most molten metal is filled, resulting in a complete product with no cavities.
また、本願発明は真空鋳造に限定されるものではなく、
一般の鋳造法に利用しても好結果が期待できるものであ
る。Furthermore, the present invention is not limited to vacuum casting,
Good results can be expected even when used in general casting methods.
第１図はダイカストの真空鋳造法を示す一部欠截した正
面から見た縦断面図である。
第２図は第１図のＡ −Ａ方向から見た可動金型側を示
す側面図である。
第３図は第１図のＢ−Ｂ方向から見た固定金型側を示す
側面図である。
第４図はガス抜き溝中に差圧緩和隙間を設けた縦断面図
。
第５図はガス抜き溝中に差圧緩和隙間を設けた固定金型
側の側面図である。
第６図はガス抜き溝中に差圧緩和隙間を設けた一部拡大
した縦断面図である。
第７図は圧動検知装置を示す縦断面図である。
第８図は沸騰遮断装置を抵抗湯道とした可動金型偲を示
す側面図。
第９図はガス抜き溝に代えて湯溜りとした可動金型側を
示す側面図。
第１０図は湯溜りを示す一部拡大した縦断面図である。
１・・・沸騰遮断ピン ２・・・湯 道３００
．キャビティ ４＠・・スリーブ５・・・
バ ネ ６＠・・ガス抜き溝７・・・先
端面 ８・・壷合わせ面９・・・高真空
ガス抜き溝 １０・・・差圧緩和隙間１１・・・底
面
１３・・・斜面
１５−−−那速射出用り
（ットスイッチ
１７・・・湯溜り
１２・・・圧動検知装置
１４・ψ・滑動板
１６・・・抵抗湯道
手
続
補
正
書FIG. 1 is a longitudinal sectional view, partially cut away, seen from the front, showing the vacuum die casting method. FIG. 2 is a side view showing the movable mold side seen from the direction A-A in FIG. 1. FIG. 3 is a side view showing the fixed mold side viewed from the direction BB in FIG. 1. FIG. 4 is a longitudinal cross-sectional view showing a differential pressure relaxation gap provided in the gas vent groove. FIG. 5 is a side view of the fixed mold in which a differential pressure relaxation gap is provided in the gas vent groove. FIG. 6 is a partially enlarged vertical cross-sectional view showing a differential pressure relaxation gap provided in the gas vent groove. FIG. 7 is a longitudinal sectional view showing the pressure detection device. FIG. 8 is a side view showing a movable mold with a boiling cutoff device as a resistance runner. FIG. 9 is a side view showing the movable mold side with a hot water reservoir instead of a gas vent groove. FIG. 10 is a partially enlarged vertical cross-sectional view showing the water reservoir. 1... Boil cutoff pin 2... Hot water road 300
．． Cavity 4 @ Sleeve 5...
Spring 6 @... Gas venting groove 7... Tip surface 8... Urn mating surface 9... High vacuum gas venting groove 10... Differential pressure relaxation gap 11... Bottom surface 13... Slope 15- --For fast injection (twitch 17...pool 12...pressure detection device 14/ψ/sliding plate 16...resistance runner procedure amendment
Claims (1)
置を設け、湯道からガス抜き溝 を枝設したことを特徴とするダイカストの真空鋳造法。 ２、沸騰遮断装置が、強力なバネ圧で押されるピンで湯
道を閉塞することを特徴とする 請求項１記載のダイカストの真空鋳造法。 ３、沸騰遮断装置がバネ圧で押されるピンであり、湯道
から枝設したガス抜き溝中に差 圧緩和隙間を設けたことを特徴とする請求項１記載のダ
イカストの真空鋳造法。 ４、沸騰遮断装置をスリーブからの溶湯圧力で動かし、
該、移動力で高速射出用リミツ トスイッチを作動させ高速射出を行なわせることを特徴
とする請求項１記載のダイカストの真空鋳造法。 ５、沸騰遮断装置が蛇行形成した抵抗湯道であることを
特徴とする請求項１記載のダイカストの真空鋳造法。 ６、ガス抜き溝に代えて湯溜りにしたことを特徴とする
請求項１記載のダイカストの真空鋳造法。[Scope of Claims] 1. A vacuum casting method for die casting, characterized in that a boiling cutoff device is provided in the runner leading from the sleeve to the cavity, and a gas vent groove is provided as a branch from the runner. 2. The vacuum casting method for die casting according to claim 1, wherein the boiling shutoff device closes the runner with a pin pushed by a strong spring pressure. 3. The vacuum casting method for die casting according to claim 1, wherein the boiling cutoff device is a pin pressed by spring pressure, and a differential pressure relaxation gap is provided in a gas vent groove extending from the runner. 4. Move the boiling cutoff device using the molten metal pressure from the sleeve,
2. The vacuum die casting method according to claim 1, wherein said moving force operates a high speed injection limit switch to perform high speed injection. 5. The vacuum die casting method according to claim 1, wherein the boiling cutoff device is a meandering resistance runner. 6. The vacuum casting method for die casting according to claim 1, characterized in that a pool is used in place of the gas vent groove.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2654790A JPH03230855A (en) | 1990-02-05 | 1990-02-05 | Vacuum casting method in die casting |
| EP91101449A EP0441289A1 (en) | 1990-02-05 | 1991-02-04 | Vacuum die casting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2654790A JPH03230855A (en) | 1990-02-05 | 1990-02-05 | Vacuum casting method in die casting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03230855A true JPH03230855A (en) | 1991-10-14 |
Family
ID=12196538
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2654790A Pending JPH03230855A (en) | 1990-02-05 | 1990-02-05 | Vacuum casting method in die casting |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0441289A1 (en) |
| JP (1) | JPH03230855A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0796154B2 (en) * | 1991-05-24 | 1995-10-18 | 有限会社山崎工作所 | Mold for casting |
| DE19914830A1 (en) * | 1999-04-01 | 2000-10-05 | Buehler Druckguss Ag Uzwil | Vacuum die casting process involves opening the evacuated die cavity only after complete filling of the casting chamber with molten metal |
| DE102007012577A1 (en) | 2007-03-13 | 2008-09-18 | Bühler Druckguss AG | Process for venting molds |
| WO2017066951A1 (en) * | 2015-10-22 | 2017-04-27 | GM Global Technology Operations LLC | Ultra-vacuum high pressure die casting process, and system therefore |
| EP3827913A1 (en) * | 2019-11-29 | 2021-06-02 | Heraeus Deutschland GmbH & Co KG | Injection molding system for injection molding of amorphous metals |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1001767A (en) * | 1949-12-02 | 1952-02-27 | Improvement brought to the die-casting process and equipment by allowing the implementation | |
| GB755080A (en) * | 1954-06-29 | 1956-08-15 | Hodler Fritz | Improvements in or relating to machines for casting under pressure |
| US3121926A (en) * | 1957-11-04 | 1964-02-25 | Glen R Morton | Vacuum system for die casting |
| GB1052810A (en) * | 1963-11-14 | |||
| CH454369A (en) * | 1966-03-18 | 1968-04-15 | Buehler Ag Geb | Suction device for venting the molds of die casting machines |
| DE3760303D1 (en) * | 1986-04-11 | 1989-08-17 | Alusuisse | Process and plant for pressure casting |
| DE3701218A1 (en) * | 1987-01-17 | 1988-07-28 | Vaw Ver Aluminium Werke Ag | METHOD AND DEVICE FOR PRODUCING FIBER REINFORCED METAL PARTS |
-
1990
- 1990-02-05 JP JP2654790A patent/JPH03230855A/en active Pending
-
1991
- 1991-02-04 EP EP91101449A patent/EP0441289A1/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| EP0441289A1 (en) | 1991-08-14 |
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