JP2813134B2 - Multi-cavity high pressure casting mold - Google Patents
Multi-cavity high pressure casting moldInfo
- Publication number
- JP2813134B2 JP2813134B2 JP6143324A JP14332494A JP2813134B2 JP 2813134 B2 JP2813134 B2 JP 2813134B2 JP 6143324 A JP6143324 A JP 6143324A JP 14332494 A JP14332494 A JP 14332494A JP 2813134 B2 JP2813134 B2 JP 2813134B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- gas vent
- pressure casting
- product
- slit
- 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
- Moulds For Moulding Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、複数個取り高圧鋳造用
金型に関し、詳細には、アルミニウムまたはマグネシウ
ムの高圧鋳造に用いられる、複数個の製品キャビティが
形成された金型に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-cavity mold for high pressure casting, and more particularly to a mold having a plurality of product cavities for use in high pressure casting of aluminum or magnesium. .
【０００２】[0002]
【従来の技術】アルミニウムまたはマグネシウムの高圧
鋳造としてはダイカスト法が一般的である。このダイカ
スト法は、一般に金型が用いられ高速度・高圧力で溶湯
を金型の製品キャビティ内に押し込むため、鋳造製品を
大量に精度良く製造できる生産性の高い方法として知ら
れている。この製法の欠点は、高速射出のため製品キャ
ビティ内のガスが充分に排出されずに残ることがあり、
ガスが充分に排出されないと製品内部に圧縮されて残留
し、ガス欠陥を生じることがある。そこで、このような
問題に対処するため、従来よりＰＦダイカスト法、ＧＦ
ダイカスト法、真空ダイカスト法等が開発され、適用さ
れている。2. Description of the Related Art A die casting method is generally used for high-pressure casting of aluminum or magnesium. This die casting method is generally known as a highly productive method capable of producing a large amount of cast products with high accuracy because a die is generally used and a molten metal is pressed into a product cavity of the die at a high speed and a high pressure. The disadvantage of this method is that the gas in the product cavity may not be sufficiently exhausted due to the high-speed injection, and may remain.
If the gas is not exhausted sufficiently, it may be compressed and remain inside the product, resulting in gas defects. Therefore, in order to deal with such a problem, the PF die casting method and the GF
Die casting, vacuum die casting and the like have been developed and applied.
【０００３】一方、金型を使用し溶湯を比較的低速で充
填し高圧鋳造する方法もある。この方法の場合は、一般
に製品キャビティから大気系に連通するガス抜きスリッ
トを設けることで金型の製品キャビティ内のガスを排出
する方法が採用されている。（例えば実開昭58− 57361
号公報参照）[0003] On the other hand, there is a method in which a molten metal is filled at a relatively low speed using a mold and high-pressure casting is performed. In the case of this method, a method is generally employed in which a gas vent slit is provided from the product cavity to communicate with the atmosphere, thereby discharging the gas in the product cavity of the mold. (For example, Japanese Utility Model Application No. 58-57361
No.)
【０００４】[0004]
【発明が解決しようとする課題】ところで、上述したダ
イカスト法あるいは溶湯を比較的低速で充填する高圧鋳
造法のいずれの方法を用いても、複数個の製品キャビテ
ィを形成した金型を用いて高圧鋳造すると、製品キャビ
ティ毎の背圧の相違からガス抜きが不均一になるととも
に、溶湯充填時間にタイムラグが生じ停滞した溶湯表面
を有する製品部に不廻・湯境欠陥が発生し易くなるとい
う問題がある。However, whether using the above-described die casting method or the high-pressure casting method in which the molten metal is filled at a relatively low speed, a high-pressure mold using a mold having a plurality of product cavities is used. When casting, the gas release becomes uneven due to the difference in the back pressure of each product cavity, and a time lag occurs during the filling time of the molten metal. There is.
【０００５】本発明は、上記の問題点を解消するために
なしたものであって、その目的は、製品キャビティ毎の
ガス抜きを均一になし得、不廻・湯境欠陥が生じ難い複
数個取り高圧鋳造用金型を提供することである。SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a plurality of cavities in which product gas cavities can be uniformly ventilated and non-return and hot-sea defects are less likely to occur. An object of the present invention is to provide a mold for high pressure casting.
【０００６】[0006]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明に係る複数個取り高圧鋳造用金型は、複数
個の製品キャビティが形成された高圧鋳造用金型におい
て、各製品キャビティ間を連通するガス抜きスリットを
設けるとともに、この製品キャビティ間ガス抜きスリッ
トに、大気系に連通するガス抜きスリットを連通させて
設けたものである。In order to achieve the above object, a multi-cavity high-pressure casting mold according to the present invention comprises a plurality of product cavities formed in a high-pressure casting mold. A gas vent slit communicating between the cavities is provided, and a gas vent slit communicating with the atmosphere system is provided in the product cavity intergas slit.
【０００７】そして、上記の複数個取り高圧鋳造用金型
においては、製品キャビティ間ガス抜きスリットの断面
積は、大気系ガス抜きスリットの断面積と同じかもしく
は20倍以下であってもよい。[0007] In the above-mentioned multiple-cavity high-pressure casting mold, the cross-sectional area of the gas vent slit between product cavities may be equal to or less than 20 times the cross-sectional area of the atmospheric gas vent slit.
【０００８】[0008]
【作用】本発明では、各製品キャビティ間を連通するガ
ス抜きスリットを設けているので、高圧鋳造時に各製品
キャビティ内にかかる背圧をほぼ等しくでき、このよう
に背圧が等しくなることからガス抜きが均一になるとと
もに、溶湯充填時間もほぼ同じにでき停滞する溶湯もな
くなることから不廻・湯境欠陥の発生を抑えることがで
きる。しかもさらに、上記製品キャビティ間ガス抜きス
リットには、大気系に連通するガス抜きスリットを連通
させて設けているので、各製品キャビティ内のガスを背
圧をほぼ等しくして抜くことができる。According to the present invention, since the gas vent slits communicating between the product cavities are provided, the back pressure applied to the product cavities during the high pressure casting can be substantially equalized. Draining becomes uniform, the filling time of the molten metal becomes almost the same, and there is no stagnation of the molten metal. Moreover, since the gas vent slits between the product cavities are provided so as to communicate with the gas vent slits communicating with the atmosphere system, the gas in each product cavity can be vented with substantially equal back pressure.
【０００９】上記の作用効果をより確実に享受するため
には、製品キャビティ間ガス抜きスリットは各製品キャ
ビティの最終溶湯充填部近傍位置に設置するとよく、こ
の場合、溶湯充填終了まで上記作用効果の持続が期待で
きる。In order to more reliably enjoy the above-mentioned effects, the gas vent slits between the product cavities are preferably provided in the vicinity of the final molten metal filling portion of each product cavity. Can be expected to last.
【００１０】また、製品キャビティ間ガス抜きスリット
の断面積Ａは大気系ガス抜きスリットの断面積Ｂに対し
て（Ａ／Ｂ） 1〜20程度の範囲が好ましい。その理由
は、大気系ガス抜きスリットの厚みは、溶湯が金型の外
にまで吹き出さないようにする必要があり、そのため最
大でも 0.2〜0.25mm程度が適当である。一方、製品キャ
ビティ間ガス抜きスリットは、直接大気系に連通してい
ないのでその厚みには特に制限はないが、製品取出し
後、製品のスリット部をトリミングする際、その厚さが
厚いとトリミングの作業性が悪くなると共に製品の表面
品質にも影響を及ぼすため 4〜 5mm程度が限界である。
よって、スリットの幅はほぼ同じ程度に取るとして、Ａ
／Ｂを20倍以下とするのがよい。なお、実用的にはトリ
ミングの手間を省くことを考慮し、両スリット共その厚
みを溶湯が侵入しにくい 0.2mm程度とし、幅で調節する
のがよい。The cross-sectional area A of the gas vent slit between product cavities is preferably in the range of (A / B) 1 to 20 with respect to the cross-sectional area B of the atmospheric gas vent slit. The reason is that the thickness of the air vent slit needs to be such that the molten metal does not blow out of the mold. Therefore, it is appropriate that the maximum thickness is about 0.2 to 0.25 mm. On the other hand, the thickness of the gas vent slit between product cavities is not particularly limited since it is not directly communicated with the atmospheric system.However, when trimming the slit portion of the product after taking out the product, if the thickness is large, the trimming is not possible. Since the workability deteriorates and the surface quality of the product is affected, the limit is about 4 to 5 mm.
Therefore, assuming that the width of the slit is almost the same,
/ B is preferably 20 times or less. In practice, in consideration of saving the trouble of trimming, it is preferable that both slits have a thickness of about 0.2 mm, which is hard for the molten metal to penetrate, and the width is adjusted.
【００１１】[0011]
【実施例】以下、本発明の実施例を図面を基に説明す
る。図１は、本発明に係る複数個取り高圧鋳造用金型の
説明図であって、ａは上型を除いた下型の上面図、ｂは
ａのＸ−Ｘ断面図である。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view of a multi-cavity high-pressure casting mold according to the present invention, wherein a is a top view of a lower mold excluding an upper mold, and b is a cross-sectional view taken along line XX of a.
【００１２】図において、金型１は下型（固定型）２と
上型（可動型）３で構成され、金型１内には４個の製品
キャビティ４が配設されるとともに、下型２と上型３の
型合わせ面には各製品キャビティ４間に連通するガス抜
きスリット５とこのスリット５に連通し大気系に開放す
るガス抜きスリット６とが設けられている。また、下型
２の中心部の金型スリーブ７と各製品キャビティ４との
間にはゲート８が連通し、金型スリーブ７より押し込ま
れた溶湯がゲート８を通って各製品キャビティ４へ充填
されるようになっている。In FIG. 1, a mold 1 is composed of a lower mold (fixed mold) 2 and an upper mold (movable mold) 3. In the mold 1, four product cavities 4 are provided. The mold mating surface of the upper mold 2 and the upper mold 3 are provided with a gas vent slit 5 communicating between the product cavities 4 and a gas vent slit 6 communicating with the slit 5 and opening to the atmosphere. A gate 8 communicates between the mold sleeve 7 at the center of the lower mold 2 and each product cavity 4, and the molten metal pushed from the mold sleeve 7 fills each product cavity 4 through the gate 8. It is supposed to be.
【００１３】金型１は上記の構成であるから、溶湯を金
型スリーブ７より押し込みゲート８より各製品キャビテ
ィ４へ充填すると、各製品キャビティ４内のガスは、各
製品キャビティ４内の背圧が等しくなるようにガス抜き
スリット５を通って移動するとともに、並行してガス抜
きスリット６より大気に抜けるので、各製品キャビティ
４内からのガス抜きが均一に行え、溶湯充填時間もほぼ
同じにでき停滞する溶湯もなくなることから不廻・湯境
欠陥の発生が抑制できる。Since the mold 1 has the above structure, when the molten metal is pushed from the mold sleeve 7 and filled into each product cavity 4 through the gate 8, the gas in each product cavity 4 is subjected to the back pressure in each product cavity 4. Move through the gas vent slit 5 so as to be equal, and simultaneously escape to the atmosphere through the gas vent slit 6, so that gas can be vented uniformly from the inside of each product cavity 4 and the filling time of the molten metal is almost the same. Since stagnation of the molten metal is also eliminated, the occurrence of non-return and hot-water boundary defects can be suppressed.
【００１４】因みに、上記実施例の金型１と、図２に示
す、各製品キャビティ４間に連通するガス抜きスリット
５を設けずに大気系に直接開放するガス抜きスリット６
のみを設けた従来金型９とを用いて、アルミニウム合金
溶湯を充填速度（ゲート通過時の速度） 300mm／秒で充
填し高圧鋳造した。この鋳造時の型内背圧(kgf／cm2)と
不廻・湯境欠陥の発生率（％）を表１に示す。なお、本
発明例１はガス抜きスリット５と６の寸法を共に厚み
0.2mm×幅20mmに形成し、本発明例２はガス抜きスリッ
ト５の寸法を厚み 0.4mm×幅20mm、ガス抜きスリット６
の寸法を厚み 0.2mm×幅20mmに形成し、また従来例はガ
ス抜きスリット６の寸法を厚み 0.2mm×幅20mmに形成し
た。Incidentally, the mold 1 of the above embodiment and the gas vent slit 6 shown in FIG. 2 which are directly opened to the atmosphere without the gas vent slit 5 communicating between the product cavities 4 are provided.
Using a conventional mold 9 provided only with the above, the molten aluminum alloy was filled at a filling speed (speed at the time of passing through the gate) of 300 mm / sec and subjected to high pressure casting. Table 1 shows the back pressure in the mold (kgf / cm 2 ) and the occurrence rate (%) of non-return and hot water boundary defects during casting. In addition, in Example 1 of the present invention, the dimensions of the gas vent slits 5 and 6 were both set to
In the second embodiment of the present invention, the dimensions of the gas vent slit 5 are 0.4 mm × 20 mm in width, and the gas vent slit 6
Was formed to have a thickness of 0.2 mm and a width of 20 mm, and in the conventional example, the size of the gas vent slit 6 was formed to be 0.2 mm in thickness and 20 mm in width.
【００１５】[0015]
【表１】 [Table 1]
【００１６】表１より明らかなように、本発明例１およ
び２では型内背圧がほぼ等しく、また不廻・湯境欠陥の
発生が少なく、特に本発明例２では不廻・湯境欠陥が 1
00回共ゼロであった。なお、従来例では３型、４型の型
内背圧が高く、また不廻・湯境欠陥の発生が多かった理
由は、１型〜４型の各型において図示省略したが通常押
出ピンが設けられており、その孔とのクリアランスが各
型毎に若干異なることからガス抜きスリット６以外のガ
ス抜き部の面積が異なり、これにより偏りがでたもので
ある。As is apparent from Table 1, in Examples 1 and 2 of the present invention, the back pressure in the mold was almost equal, and the occurrence of non-return and hot junction defects was small. Is 1
It was zero for both 00 times. In the conventional example, the reason why the back pressure inside the molds of the third and fourth molds is high, and the occurrence of non-return and hot water boundary defects is large is not shown in each of the first to fourth molds. Since the clearance with the hole is slightly different for each mold, the area of the gas venting portion other than the gas venting slit 6 is different, resulting in deviation.
【００１７】[0017]
【発明の効果】以上説明したように、本発明に係る複数
個取り高圧鋳造用金型によれば、高圧鋳造時に各製品キ
ャビティ内にかかる背圧をほぼ等しくでき、製品キャビ
ティ毎のガス抜きが均一に行え、不廻・湯境欠陥を発生
させることなく製品を多数個取りすることができる。As described above, according to the multi-cavity high-pressure casting mold of the present invention, the back pressure applied to each product cavity at the time of high-pressure casting can be made substantially equal, and the gas can be vented for each product cavity. It can be performed uniformly and a large number of products can be picked up without generating unsatisfactory and hot water boundary defects.
【図１】本発明に係る複数個取り高圧鋳造用金型の説明
図であって、ａは上型を除いた下型の上面図、ｂはａの
Ｘ−Ｘ断面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view of a multi-cavity high-pressure casting mold according to the present invention, wherein a is a top view of a lower mold excluding an upper mold, and b is a XX cross-sectional view of a.
【図２】従来の金型の上型を除いた下型の上面図であ
る。FIG. 2 is a top view of a lower die excluding an upper die of a conventional die.
１：金型 ２：下型
３：上型 ４：製品キャビティ ５：製品キャビティ間に連通
するガス抜きスリット ６：大気系に開放するガス抜きスリット
７：金型スリーブ ８：ゲート ９：金型1: Mold 2: Lower mold
3: Upper mold 4: Product cavity 5: Gas vent slit communicating between product cavities 6: Gas vent slit opened to atmosphere
7: Mold sleeve 8: Gate 9: Mold
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｂ２９Ｃ 45/34 Ｂ２９Ｃ 45/34 (56)参考文献 特開 平２−30361（ＪＰ，Ａ) 実開 昭64−2440（ＪＰ，Ｕ) 特公 平４−22656（ＪＰ，Ｂ２) (58)調査した分野(Int.Cl.6，ＤＢ名) B22D 17/22 B22D 18/02 B29C 33/10 B29C 45/34──────────────────────────────────────────────────続 き Continuation of the front page (51) Int.Cl. 6 Identification code FI B29C 45/34 B29C 45/34 (56) References JP-A-2-30361 (JP, A) Japanese Utility Model No. 64-2440 (JP) , U) Japanese Patent Publication No. 4-22656 (JP, B2) (58) Fields investigated (Int. Cl. 6 , DB name) B22D 17/22 B22D 18/02 B29C 33/10 B29C 45/34
Claims (2)
圧鋳造用金型において、各製品キャビティ間を連通する
ガス抜きスリットを設けるとともに、この製品キャビテ
ィ間ガス抜きスリットに、大気系に連通するガス抜きス
リットを連通させて設けたことを特徴とする複数個取り
高圧鋳造用金型。1. A high-pressure casting mold in which a plurality of product cavities are formed, a gas vent slit communicating between the product cavities is provided, and the gas vent slits between the product cavities are provided with a gas communicating with the atmosphere system. A multi-cavity high-pressure casting mold characterized by providing a communicating slit.
型において、製品キャビティ間ガス抜きスリットの断面
積が、大気系ガス抜きスリットの断面積と同じかもしく
は20倍以下である複数個取り高圧鋳造用金型。2. The multi-cavity high-pressure casting mold according to claim 1, wherein a cross-sectional area of a gas vent slit between product cavities is equal to or less than 20 times a cross-sectional area of an atmospheric gas vent slit. High pressure casting mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6143324A JP2813134B2 (en) | 1994-06-24 | 1994-06-24 | Multi-cavity high pressure casting mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6143324A JP2813134B2 (en) | 1994-06-24 | 1994-06-24 | Multi-cavity high pressure casting mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0810932A JPH0810932A (en) | 1996-01-16 |
| JP2813134B2 true JP2813134B2 (en) | 1998-10-22 |
Family
ID=15336145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6143324A Expired - Fee Related JP2813134B2 (en) | 1994-06-24 | 1994-06-24 | Multi-cavity high pressure casting mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2813134B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4166392B2 (en) * | 1999-12-01 | 2008-10-15 | 株式会社デンソー | Die casting equipment |
| JP4843263B2 (en) | 2005-06-14 | 2011-12-21 | 富士通コンポーネント株式会社 | Connector for flexible printed cable |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0815649B2 (en) * | 1987-09-03 | 1996-02-21 | 東洋機械金属株式会社 | Vacuum die casting machine |
| JPH0422656A (en) * | 1990-05-18 | 1992-01-27 | Seiko Epson Corp | Correcting method for oblique feeding of sheet in line thermal printer and line thermal printer |
-
1994
- 1994-06-24 JP JP6143324A patent/JP2813134B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0810932A (en) | 1996-01-16 |
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