JP2798527B2 - Method and apparatus for degassing mold in injection mold casting machine - Google Patents
Method and apparatus for degassing mold in injection mold casting machineInfo
- Publication number
- JP2798527B2 JP2798527B2 JP18775391A JP18775391A JP2798527B2 JP 2798527 B2 JP2798527 B2 JP 2798527B2 JP 18775391 A JP18775391 A JP 18775391A JP 18775391 A JP18775391 A JP 18775391A JP 2798527 B2 JP2798527 B2 JP 2798527B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- hot water
- injection
- water supply
- suction
- 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)
- Injection Moulding Of Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、射出式金型鋳造機にお
ける金型内のガス抜き方法およびガス抜き装置に関し、
詳細には、射出スリーブに給湯管が接続され、且つ金型
に形成したスリットに配管を介して吸引装置が設けられ
た射出式金型鋳造機における金型内のガス抜きに関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for degassing a mold in an injection mold casting machine.
More specifically, the present invention relates to degassing in a mold in an injection mold casting machine in which a hot water supply pipe is connected to an injection sleeve, and a suction device is provided through a pipe in a slit formed in the mold.
【０００２】[0002]
【従来の技術】射出スリーブに給湯管が接続された射出
式金型鋳造機としては、縦型あるいは横型の金型高圧鋳
造機（ダイキャスト機）などが知られている。2. Description of the Related Art As an injection mold casting machine in which a hot water supply pipe is connected to an injection sleeve, a vertical or horizontal mold high-pressure casting machine (die casting machine) is known.
【０００３】上記射出式金型鋳造機におけるこれまでの
金型内のガス抜きは、上下金型の間に金型キャビティか
ら金型外に向けて形成された厚さ約 0.2mmのガス抜きス
リット（以下スリットと言う）により自然放出的に行わ
れてきた。[0003] In the above-mentioned injection mold casting machine, degassing in the mold so far is performed by a gas vent slit having a thickness of about 0.2 mm formed between the upper and lower molds from the mold cavity to the outside of the mold. (Hereinafter referred to as slits).
【０００４】しかし、このようなスリットによる自然放
出的なガス抜き方法では、給湯管から射出スリーブ内へ
の給湯時および射出スリーブから金型キャビティ内への
溶湯射出時のように溶湯が比較的高速で移動する時は、
キャビティ内の背圧を無くすようにガスを抜くには限界
があり、そのため給湯量に変動を生じたり、得られた鋳
物中にガス欠陥が見られた。また背圧を減少し易くする
ためにスリットを多く設けると湯ふきの問題を起こすこ
とがあった。However, in such a spontaneous gas release method using a slit, the molten metal has a relatively high speed, such as when hot water is supplied from a hot water supply pipe into an injection sleeve and when molten metal is injected from an injection sleeve into a mold cavity. When traveling with
There is a limit in extracting gas so as to eliminate the back pressure in the cavity, so that the amount of hot water supplied fluctuated and gas defects were found in the obtained casting. Also, if many slits are provided in order to easily reduce the back pressure, there may be a problem of hot water wiping.
【０００５】[0005]
【発明が解決しようとする課題】そこで、本発明者等
は、上述の如き問題点を改善すべく鋭意研究を重ね、射
出式金型鋳造機の金型に形成したスリットに多孔質のガ
スベントおよび配管を介して吸引装置を設け、この吸引
装置により金型キャビティ内の圧力を制御する金型内の
ガス抜き方法の開発を行った。Therefore, the present inventors have conducted intensive studies to improve the above-mentioned problems, and found that a porous gas vent and a slit are formed in a slit formed in a mold of an injection mold casting machine. A suction device was provided via a pipe, and a method for degassing the mold was developed by which the pressure in the mold cavity was controlled by the suction device.
【０００６】これにより、給湯管から射出スリーブ内へ
の給湯時および射出スリーブから金型キャビティ内への
溶湯射出時における給湯量の変動や、得られた鋳物中の
ガス欠陥は充分低減されたが、上記の如くガスベントを
使用するため、上下型開き時に散布する離型剤により目
づまりを起こし、徐々に吸引効果が減少する問題が新た
に知見された。また、このように目づまりを起こすと、
短期間でガスベントの清掃または交換を余儀無くされ、
射出式金型鋳造機の生産性が低下する問題もある。[0006] As a result, fluctuations in the amount of hot water when the hot water is supplied from the hot water supply pipe into the injection sleeve and when the molten metal is injected from the injection sleeve into the mold cavity, and gas defects in the obtained casting are sufficiently reduced. However, since the gas vent is used as described above, it is newly found that the release agent sprayed when the upper and lower molds are opened causes clogging, and the suction effect is gradually reduced. Also, if you get clogged like this,
In a short period of time the gas vent had to be cleaned or replaced,
There is also a problem that productivity of the injection mold casting machine is reduced.
【０００７】本発明は、上記の問題点を解消するために
なされたものであって、その目的は、上下型開き時に散
布する離型剤によるガスベントの目づまりを極力少なく
し、吸引による金型キャビティ内のガス抜きを支障なく
行なうことができる射出式金型鋳造機の金型内のガス抜
き方法および装置を提供することである。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to minimize clogging of a gas vent due to a release agent sprayed when the upper and lower molds are opened, and to reduce a mold cavity by suction. It is an object of the present invention to provide a method and an apparatus for degassing the inside of a mold of an injection mold casting machine, which can perform degassing inside the mold without any trouble.
【０００８】[0008]
【課題を解決するための手段】上記目的を達成するため
に、本発明者らは、鋭意研究を重ねた結果、ガスベント
を通る空気を利用して目づまりを起こす離型剤除去を行
なうことが効果的であることを知見し、本発明を完成す
るに至った。すなわち本発明の射出式金型鋳造機の金型
内のガス抜き方法は、射出スリーブに給湯管を接続し、
その給湯孔の直下に溶湯を保持するとともに、金型に形
成したスリットにガスベントおよび配管を介して吸引装
置を設け、この吸引装置により金型キャビティ内の圧力
を段階的に制御する射出式金型鋳造機の金型内のガス抜
き方法であって、型開き時にはエア吹き出し状態とし、
型締め開始と同時に給湯時背圧がゼロとなるように一定
量の吸引を行ない、射出チップが給湯孔を閉じた後、さ
らに吸引量を増すように制御を行なうことを要旨とする
ものである。Means for Solving the Problems In order to achieve the above object, the present inventors have made intensive studies, and as a result, it has been found that it is effective to remove the releasing agent causing clogging using air passing through a gas vent. As a result, the present invention was completed. That is, the method of degassing the mold of the injection mold casting machine of the present invention connects a hot water supply pipe to the injection sleeve,
An injection mold that holds the molten metal just below the hot water supply hole, provides a suction device through a gas vent and piping in a slit formed in the mold, and controls the pressure in the mold cavity stepwise by this suction device. It is a method of degassing the mold in the casting machine, and when opening the mold, it is in an air blowing state,
The gist is that a fixed amount of suction is performed so that the back pressure at the time of hot water supply becomes zero simultaneously with the start of mold clamping, and control is performed so as to further increase the suction amount after the injection tip closes the hot water supply hole. .
【０００９】また本発明の射出式金型鋳造機の金型内の
ガス抜き装置は、型締め信号および射出チップ給湯孔閉
鎖信号によりエア吹き出し系および吸引量の異なる吸引
系を選択制御する電磁切換弁を、スリットに取付けたガ
スベントと、吸引装置とをつなぐ配管の途中に設けたこ
とを要旨とするものである。Further, the degassing device in the mold of the injection mold casting machine according to the present invention is an electromagnetic switching device for selectively controlling an air blowing system and a suction system having a different suction amount based on a mold clamping signal and an injection tip hot water hole closing signal. The gist is that the valve is provided in the middle of the pipe connecting the gas vent attached to the slit and the suction device.
【００１０】[0010]
【作用】本発明の構成と作用を説明する。本発明装置
は、工場の高圧エアラインを利用し、電磁三方弁、吸引
装置およびバルブから構成されている。The structure and operation of the present invention will be described. The apparatus of the present invention utilizes a high-pressure air line of a factory, and includes an electromagnetic three-way valve, a suction device, and a valve.
【００１１】図１には、本発明の金型内のガス抜き装置
における型締め信号および射出チップ給湯孔閉鎖信号に
よりエア吹き出し系および吸引量の異なる吸引系を選択
する電磁バルブのラインを示している。図において、１
は金型で、2aの可動型と2bの固定型よりなる。３は製品
と同形のキャビティである。４はオーバーフロー、５は
ガス抜きスリットで、このスリット５には６のガスベン
トが取付けられ、該ガスベント６は、7aの電磁三方弁よ
り7bの電磁三方弁を経て８の吸引装置、および7aの電磁
三方弁を経て９の工場高圧エアラインに接続されてい
る。FIG. 1 shows a line of an electromagnetic valve for selecting an air blowing system and a suction system having a different suction amount based on a mold clamping signal and an injection chip hot water supply hole closing signal in a gas releasing device in a mold according to the present invention. I have. In the figure, 1
Denotes a mold, which comprises a movable mold 2a and a fixed mold 2b. 3 is a cavity having the same shape as the product. 4 is an overflow, 5 is a gas vent slit, and 6 gas vents are attached to this slit 5. The gas vent 6 is a 7 a electromagnetic three-way valve, a 7 b electromagnetic three-way valve, a 8 suction device, and a 7 a electromagnetic valve. It is connected to nine factory high-pressure air lines via three-way valves.
【００１２】図２は、本発明の金型内のガス抜き装置14
を取付けた金型鋳造機の金型近傍の断面図である。射出
スリーブ13には給湯管11に連通している給湯孔10より溶
湯Ｍが供給され、この溶湯Ｍは射出チップ12によりキャ
ビティ３内に圧入されて製品となる。FIG. 2 shows a degassing device 14 in a mold according to the present invention.
FIG. 2 is a cross-sectional view of the vicinity of the mold of the mold casting machine to which the is attached. The molten metal M is supplied to the injection sleeve 13 from the hot water supply hole 10 communicating with the hot water supply pipe 11, and the molten metal M is pressed into the cavity 3 by the injection tip 12 to be a product.
【００１３】本発明においては金型１のスリット５の出
口を一箇所に集め、その部分にガスベント６を取付けて
吸引できる構造としている。そして鋳造製品を取り出
し、次の鋳造を行なうために金型１を開き離型剤を散布
する際、ガスベント６よりエアを吹き出す状態とし、離
型剤散布によるガスベント６の目づまりを防止する。In the present invention, the outlets of the slits 5 of the mold 1 are collected at one location, and a gas vent 6 is attached to that portion to allow suction. Then, when the cast product is taken out and the mold 1 is opened to perform the next casting and the release agent is sprayed, air is blown out from the gas vent 6 to prevent clogging of the gas vent 6 due to the spray of the release agent.
【００１４】続いて鋳造機からの型閉め開始信号により
電磁三方弁7aを、エア吹き出し系から１次吸引系に切換
える。このときの吸引量は給湯による背圧がほぼゼロと
なるように設定を行ない、給湯精度のバラツキを防止す
る。Subsequently, the electromagnetic three-way valve 7a is switched from the air blowing system to the primary suction system according to a mold closing start signal from the casting machine. At this time, the suction amount is set so that the back pressure due to the hot water supply becomes substantially zero, thereby preventing variation in the hot water supply accuracy.
【００１５】次に鋳造機からの射出チップ給湯孔閉鎖信
号により電磁三方弁7bを、１次吸引系より吸引量の多い
２次吸引系に切換える。これにより鋳物のガス欠陥を防
止することができる。ただし、吸引圧力が−0.2kgf／cm
2 以下となると射出スリーブ13および射出チップ12間か
らバブリングを起こし、鋳物内にガス欠陥を生じる。Next, the electromagnetic three-way valve 7b is switched to a secondary suction system having a larger suction amount than the primary suction system according to an injection tip hot water hole closing signal from the casting machine. As a result, gas defects in the casting can be prevented. However, the suction pressure is -0.2kgf / cm
If it is less than 2, bubbling will occur from between the injection sleeve 13 and the injection tip 12, and gas defects will occur in the casting.
【００１６】[0016]
【実施例】本発明の実施例を説明する。上述した図１お
よび図２に示す鋳造装置を利用し、2.0kgf／cm2 エア吹
き出しおよび２次吸引圧力を−0.2kgf／cm2 の条件のも
とで、本発明方法によりアルミホイールを製造した。そ
の際のガスベントの寿命、給湯精度およびガス欠陥発生
率を表１に示す。また比較のため、エア吹き出しをせず
１次および２次吸引のみで同様にアルミホイールを製造
した場合と、スリットのみによる従来方法の場合のガス
ベントの寿命、給湯精度およびガス欠陥発生率を併せて
表１に示す。An embodiment of the present invention will be described. Using the casting apparatus shown in FIGS. 1 and 2 described above, 2.0 kgf / cm 2 air blowout and secondary suction pressure under the condition of -0.2kgf / cm 2, was produced aluminum wheel by the method of the present invention . Table 1 shows the life of the gas vent, the accuracy of hot water supply, and the rate of occurrence of gas defects at that time. For comparison, the life of a gas vent, the accuracy of hot water supply, and the rate of occurrence of gas defects in the case where an aluminum wheel is manufactured in the same manner only by primary and secondary suction without air blowing and in the case of the conventional method using only a slit are also shown. It is shown in Table 1.
【００１７】[0017]
【表１】 [Table 1]
【００１８】[0018]
【発明の効果】本発明は、以上説明したように構成され
ているから、金型のガスベントの目づまりを防止するこ
とができかつ、給湯精度の向上により製品品質の均一性
が高まりガス欠陥発生が防止されるという効果が奏さ
れ、延いては射出式金型鋳造機の生産性を向上すること
ができ、産業上極めて有用である。According to the present invention, as described above, clogging of the gas vent of the mold can be prevented, and the uniformity of the product quality can be improved by improving the accuracy of hot water supply, and gas defects can be generated. This has the effect of being prevented, and thus the productivity of the injection mold casting machine can be improved, which is extremely useful in industry.
【図１】本発明に係わる金型内ガス抜き装置におけるエ
ア吹き出し系および吸引量の異なる吸引系を選択する電
磁切換弁のラインを示す説明図である。FIG. 1 is an explanatory view showing a line of an electromagnetic switching valve for selecting an air blowing system and a suction system having a different suction amount in a mold degassing apparatus according to the present invention.
【図２】本発明に係わる金型内ガス抜き装置を取付けた
金型鋳造機の金型近傍の断面図である。FIG. 2 is a sectional view of the vicinity of a mold of a mold casting machine to which a degassing device in a mold according to the present invention is attached.
１：金型 2a：可動型 2
b：固定型 ３：キャビティ ４：オーバーフロー
５：スリット ６：ガスベント 7a, 7b：電磁三方弁
８：吸引装置 ９：高圧エアライン 10：給湯孔 1
1：給湯管 12：射出チップ 13：射出スリーブ 1
4：ガス抜き装置 Ｍ：溶湯1: Mold 2a: Movable mold 2
b: Fixed type 3: Cavity 4: Overflow
5: slit 6: gas vent 7a, 7b: solenoid three-way valve
8: Suction device 9: High pressure air line 10: Hot water supply hole 1
1: Hot water supply pipe 12: Injection tip 13: Injection sleeve 1
4: Degassing device M: Molten metal
フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｂ２９Ｃ 45/63 Ｂ２９Ｃ 45/63 (56)参考文献 特開 昭63−207463（ＪＰ，Ａ) 特開 昭63−72462（ＪＰ，Ａ) 特開 昭63−174772（ＪＰ，Ａ) 特開 平４−123858（ＪＰ，Ａ) 特開 昭61−273247（ＪＰ，Ａ) 実開 昭63−157458（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) B22D 17/22 B22C 9/06 B22D 17/32Continuation of the front page (51) Int.Cl. 6 Identification symbol FI B29C 45/63 B29C 45/63 (56) References JP-A-63-207463 (JP, A) JP-A-63-72462 (JP, A) JP-A-63-174772 (JP, A) JP-A-4-123858 (JP, A) JP-A-61-273247 (JP, A) JP-A-63-157458 (JP, U) (58) (Int.Cl. 6 , DB name) B22D 17/22 B22C 9/06 B22D 17/32
Claims (2)
湯孔の直下に溶湯を保持するとともに、金型に形成した
スリットにガスベントおよび配管を介して吸引装置を設
け、この吸引装置により金型キャビティ内の圧力を段階
的に制御する射出式金型鋳造機の金型内のガス抜き方法
であって、型開き時にはエア吹き出し状態とし、型締め
開始と同時に給湯時背圧がゼロとなるように一定量の吸
引を行ない、射出チップが給湯孔を閉じた後、さらに吸
引量を増すように制御を行なうことを特徴とする射出式
金型鋳造機の金型内のガス抜き方法。1. A hot water supply pipe is connected to an injection sleeve, a molten metal is held immediately below a hot water supply hole, and a suction device is provided in a slit formed in a mold via a gas vent and a pipe. A method of degassing a mold of an injection mold casting machine in which the pressure in a cavity is controlled in a stepwise manner, wherein an air is blown out when the mold is opened, and the back pressure at the time of hot water supply becomes zero simultaneously with the start of mold clamping. A method of performing degassing in a mold of an injection mold casting machine, wherein a predetermined amount of suction is performed, and after the injection tip closes a hot water supply hole, control is performed so as to further increase the suction amount.
信号によりエア吹き出し系および吸引量の異なる吸引系
を選択制御する電磁切換弁を、スリットに取付けたガス
ベントと、吸引装置とをつなぐ配管の途中に設けたこと
を特徴とする射出式金型鋳造機の金型内のガス抜き装
置。An electromagnetic switching valve for selectively controlling an air blowing system and a suction system having a different suction amount based on a mold clamping signal and an injection tip hot water supply hole closing signal is provided in a pipe connecting the gas vent attached to the slit to the suction device. A degassing device in a mold of an injection mold casting machine, characterized in that it is provided in the mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18775391A JP2798527B2 (en) | 1991-07-26 | 1991-07-26 | Method and apparatus for degassing mold in injection mold casting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18775391A JP2798527B2 (en) | 1991-07-26 | 1991-07-26 | Method and apparatus for degassing mold in injection mold casting machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0531563A JPH0531563A (en) | 1993-02-09 |
| JP2798527B2 true JP2798527B2 (en) | 1998-09-17 |
Family
ID=16211603
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18775391A Expired - Fee Related JP2798527B2 (en) | 1991-07-26 | 1991-07-26 | Method and apparatus for degassing mold in injection mold casting machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2798527B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3951653B2 (en) | 2001-09-13 | 2007-08-01 | 豊田合成株式会社 | Manufacturing method of molded products |
| JP4421473B2 (en) * | 2002-05-23 | 2010-02-24 | 株式会社ブリヂストン | Tire mold piece and piece type tire mold |
-
1991
- 1991-07-26 JP JP18775391A patent/JP2798527B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0531563A (en) | 1993-02-09 |
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