JPH08174180A - Die degassing device - Google Patents
Die degassing deviceInfo
- Publication number
- JPH08174180A JPH08174180A JP32810594A JP32810594A JPH08174180A JP H08174180 A JPH08174180 A JP H08174180A JP 32810594 A JP32810594 A JP 32810594A JP 32810594 A JP32810594 A JP 32810594A JP H08174180 A JPH08174180 A JP H08174180A
- Authority
- JP
- Japan
- Prior art keywords
- pressure receiving
- connecting plate
- drive connecting
- mold
- receiving piston
- 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.)
- Granted
Links
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ダイカスト鋳造におい
て、型閉め後にキャビティ内の空気やガスを吸引してキ
ャビティ内を減圧するための金型用ガス抜き装置に関
し、詳しくは、金型のキャビティに通じるガス抜き溝の
終端部に連通設置したガス抜き弁を、キャビティからガ
ス抜き溝を上昇して来た溶湯の作用でもって閉弁するよ
うに構成した金型用ガス抜き装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a degassing device for a die for sucking air or gas in the cavity to close the cavity after closing the die in die casting, and more specifically, to a die cavity. The present invention relates to a degassing device for a die, which is configured to close a gas vent valve that is installed in communication with a terminal end of a gas vent groove that communicates with a cavity by the action of molten metal that has risen from the cavity in the gas vent groove. .
【０００２】[0002]
【従来の技術】この種の金型用ガス抜き装置としては各
種の構造のものが提案されているが、本願発明に最も近
いものとして、特開平６−２７７８１８号公報に開示さ
れたものがある。2. Description of the Related Art Various types of mold degassing devices have been proposed, but the one closest to the present invention is disclosed in Japanese Patent Laid-Open No. 6-277818. .
【０００３】この従来のものは、図６に示す如く、型合
わせ面６に金型４ａ，４ｂのキャビティに通じるガス抜
き溝８を形成し、そのガス抜き溝の終端部８’に型合わ
せ面６から奥行方向にわたりガス抜き弁２を設置すると
共に、ガス抜き溝８の途上には受圧ピストン３を上記ガ
ス抜き弁２と並列平行状に設置せしめ、受圧ピストン３
の基端部に設けた駆動連結板１３をガス抜き弁２に連結
させ、且つ上記受圧ピストン３の駆動連結板１３を型合
わせ面６方へ付勢押圧するための付勢手段１２にプッシ
ュロッド１９の先端19a を当接せしめ、プッシュロッド
１９の他端19bを型合わせ面６から突出させ、型閉め時
に、上記付勢手段１２をプッシュロッド１９でもって押
し戻し、金型キャビティからガス抜き溝８を上昇して来
た溶湯が上記受圧ピストン３の受圧部３ａを押圧するこ
とにより駆動連結板１３を介してガス抜き弁２が閉弁状
態とされるように構成されている。しかし乍らこのもの
は、受圧ピストン３の受圧部３ａが常時シリンダ部１４
内に在るため、鋳造時に発生する鋳ばり、即ち、金型キ
ャビティからガス抜き溝８を上昇して来た溶湯が受圧ピ
ストンの受圧部３ａを押圧した際に受圧ピストンの受圧
部３ａ外周に発生する鋳ばりが受圧ピストン３とそのシ
リンダ部１４内周面との間に差込んで、動作不良を起し
やすい不具合があった。As shown in FIG. 6, in this conventional device, a gas vent groove 8 communicating with the cavities of the molds 4a and 4b is formed on the die mating surface 6, and the die mating surface is formed at the end portion 8'of the gas vent groove. The gas vent valve 2 is installed from 6 in the depth direction, and the pressure receiving piston 3 is installed in parallel with the gas vent valve 2 in the middle of the gas vent groove 8 so that the pressure receiving piston 3
A drive connecting plate 13 provided at the base end of the push rod is connected to the degassing valve 2 and a biasing means 12 for biasing and pressing the drive connecting plate 13 of the pressure receiving piston 3 toward the mold matching surface 6 is provided. The tip 19a of 19 is brought into contact, the other end 19b of the push rod 19 is made to project from the mold matching surface 6, and when the mold is closed, the urging means 12 is pushed back by the push rod 19 so that the gas vent groove 8 from the mold cavity. The molten metal that has risen presses the pressure receiving portion 3a of the pressure receiving piston 3 so that the degassing valve 2 is closed via the drive connecting plate 13. However, in this case, the pressure receiving portion 3a of the pressure receiving piston 3 is always the cylinder portion 14a.
Since it is inside, the flash generated during casting, that is, when the molten metal rising from the mold cavity through the gas vent groove 8 presses the pressure receiving portion 3a of the pressure receiving piston, There is a problem that the flash generated is inserted between the pressure receiving piston 3 and the inner peripheral surface of the cylinder portion 14 to cause malfunction.
【０００４】[0004]
【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、受圧ピストンと
そのシリンダ内周面との間に鋳ばりが差込んで動作不良
を起すような惧れのない金型用ガス抜き装置を提供せん
とするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and a flash is inserted between the pressure receiving piston and the inner peripheral surface of the cylinder to cause malfunction. The purpose of the invention is to provide a degassing device for molds without fear of damage.
【０００５】[0005]
【課題を解決するための手段】斯る目的を達成する本発
明の金型用ガス抜き装置は、型合わせ面に金型のキャビ
ティに通じるガス抜き溝を形成し、該ガス抜き溝の終端
部に型合わせ面から奥行方向にわたりガス抜き弁を設置
すると共に、該ガス抜き溝途上には受圧ピストンを上記
ガス抜き弁と並列平行状に設置し、上記受圧ピストンの
基端部に設けた駆動連結板を前記ガス抜き弁に連結さ
せ、且つ上記駆動連結板を型合わせ面方へ付勢押圧する
ための付勢手段にプッシュロッドの先端を当接せしめ、
該プッシュロッドの他端を前記型合わせ面から突出さ
せ、型閉め時に上記付勢手段を上記プッシュロッドで押
し戻し、金型キャビティから前記ガス抜き溝を上昇して
来た溶湯が上記受圧ピストンの受圧部を押圧することに
より上記駆動連結板を介して前記ガス抜き弁が閉弁状態
とされる金型用ガス抜き装置において、前記受圧ピスト
ンのシリンダ部内に通じるエアーブロー用通路を形成
し、該受圧ピストンの受圧部をそのシリンダ部から前記
ガス抜き溝内へ出没自在となし、前記プッシュロッドの
一端を前記駆動連結板を貫通させて前記付勢手段に当接
させると共に、該プッシュロッドの一端側に前記駆動連
結板に当接係合する当接段部を形成せしめ、型閉め時に
上記プッシュロッドの当接段部でもって前記駆動連結板
が押圧された時に前記受圧ピストンの受圧部がシリンダ
部内に没入するように形成した事を特徴としたものであ
る。In the die venting apparatus of the present invention for achieving the above object, a venting groove communicating with a cavity of a die is formed on a die mating surface, and an end portion of the venting groove is formed. A gas vent valve is installed in the depth direction from the mold matching surface, and a pressure receiving piston is installed in parallel with the gas vent valve in the middle of the gas vent groove, and a drive connection is provided at the base end of the pressure piston. A plate is connected to the gas vent valve, and the tip of the push rod is brought into contact with an urging means for urging and pressing the drive connecting plate toward the mold matching surface;
The other end of the push rod is projected from the mold matching surface, the urging means is pushed back by the push rod when the mold is closed, and the molten metal that has risen from the mold cavity into the degassing groove receives the pressure of the pressure receiving piston. In a mold degassing device in which the degassing valve is closed by pressing the portion via the drive connecting plate, an air blow passage communicating with the cylinder part of the pressure receiving piston is formed, The pressure receiving portion of the piston is freely retractable from the cylinder portion into the degassing groove, one end of the push rod penetrates the drive connecting plate to abut the biasing means, and one end side of the push rod. A contact step portion that abuts and engages with the drive connecting plate, and when the drive connecting plate is pressed by the contact step portion of the push rod when the mold is closed, In which the pressure receiving portion of the pressure piston is characterized in that formed as retracted into the cylinder portion.
【０００６】[0006]
【実施例】以下、本発明の実施の一例を図面に基づいて
説明する。このガス抜き装置Ａは、分割可能な前後２つ
のハウジングブロック１ａ，１ｂ内にガス抜き弁２や受
圧ピストン３等が一体的に組込まれて構成され、左右方
向に開閉自在な金型４ａ，４ｂの一方、例えば固定型４
ａの上部に形成した凹部５内に設置され、図示していな
いネジ等でもって固定される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. This degassing device A is configured by integrally assembling a degassing valve 2, a pressure receiving piston 3 and the like in two front and rear housing blocks 1a and 1b that can be divided, and molds 4a and 4b that can be opened and closed in the left-right direction. One, for example, fixed type 4
It is installed in the recess 5 formed in the upper part of a and is fixed by a screw or the like not shown.
【０００７】そして、前側ハウジングブロック１ａの前
面、すなわち型合わせ面６には、金型４ａ，４ｂのキャ
ビティ７に通じるガス抜き溝８が形成される。このガス
抜き溝８は、図２に例示する如く、複数の湯溜り室８
ａ，８ｂとそこから分岐した複数の枝溝８ｃ，８ｄとで
構成される。即ち、金型キャビティ７から上昇して来た
溶湯が集中的に作用する途上位置に湯溜り室８ｂを形成
し、その湯溜り室８ｂ内に受圧ピストン３を配置すると
共に、その湯溜り室８ｂから複数の枝溝８ｃ，８ｄを迂
回させることによって金型キャビティ７から上昇して来
た溶湯がその衝撃力により受圧ピストン３を押圧し駆動
連結板１３を介してガス抜き弁２が閉じられた後に溶湯
が到着する終端部８’位置に、ガス抜き弁２を配置させ
る。On the front surface of the front housing block 1a, that is, the mold matching surface 6, there is formed a gas vent groove 8 communicating with the cavity 7 of the molds 4a and 4b. As shown in FIG. 2, the degassing groove 8 has a plurality of pools 8
a, 8b and a plurality of branch grooves 8c, 8d branched therefrom. That is, the molten metal rising from the die cavity 7 is concentrated on the way to form a molten metal pool chamber 8b, the pressure receiving piston 3 is arranged in the molten metal pool chamber 8b, and the molten metal pool chamber 8b is formed. The molten metal rising from the mold cavity 7 by bypassing the plurality of branch grooves 8c, 8d presses the pressure receiving piston 3 by its impact force and the degassing valve 2 is closed via the drive connecting plate 13. The degassing valve 2 is arranged at the position of the end portion 8 ′ where the molten metal will later arrive.
【０００８】ガス抜き弁２は、金型キャビティ７からガ
ス抜き溝８を通って来たガスや空気などを外部に排出さ
せるためのものであり、前側ハウジングブロック１ａの
型合わせ面６から後側ハウジングブロック１ｂにわたっ
て水平方向に開口形成したバルブシリンダ部９内に軸方
向に摺動自在に設置すると共に、その弁頭２ａをバルブ
シリンダ部９内からガス抜き溝８内へ出没自在となし、
弁頭２ａがガス抜き溝８内に出没してバルブシリンダ部
９の弁口９ａを開閉することにより、弁動作を行なうも
のである。The gas vent valve 2 is for exhausting gas, air, etc. coming from the mold cavity 7 through the gas vent groove 8 to the outside, and from the mold matching surface 6 of the front housing block 1a to the rear side. The valve head 2a is installed slidably in an axial direction in a valve cylinder portion 9 that is horizontally formed over the housing block 1b, and the valve head 2a can be retracted from the valve cylinder portion 9 into the gas vent groove 8.
The valve operation is performed by the valve head 2a appearing and retracting in the gas vent groove 8 to open and close the valve opening 9a of the valve cylinder portion 9.
【０００９】ガス抜き弁２のバルブシリンダ部９には、
外部に通じる排気用通路１０並びにエアーブロー用通路
１１を連通させ、排気用通路１０には真空装置（図示せ
ず）に接続された排気用ホースを連通接続せしめて、金
型キャビティ７からガス抜き溝８を通って来たガスや空
気などを外部へ排出させるようになし、またエアーブロ
ー用通路１１にはエアーホース（図示せず）を連通接続
せしめて、ガス抜き弁２の弁頭２ａがガス抜き溝８内に
突出してバルブシリンダ部９の弁口９ａが開口している
時にバルブシリンダ部９内周面ないしガス抜き弁２の弁
頭２ａ外周をエアーブローするようになす。In the valve cylinder portion 9 of the gas vent valve 2,
An exhaust passage 10 and an air blow passage 11 communicating with the outside are connected to each other, and an exhaust hose connected to a vacuum device (not shown) is connected to the exhaust passage 10 so as to release gas from the mold cavity 7. The gas or air that has passed through the groove 8 is not discharged to the outside, and an air hose (not shown) is connected to the air blow passage 11 so that the valve head 2a of the gas vent valve 2 is When the valve opening 9a of the valve cylinder portion 9 is opened by protruding into the gas vent groove 8, the inner peripheral surface of the valve cylinder portion 9 or the outer periphery of the valve head 2a of the gas vent valve 2 is blown with air.
【００１０】また、受圧ピストン３は、金型キャビティ
７からガス抜き溝８を上昇して来た溶湯ｍと型合わせ面
６方へ付勢押圧する付勢手段１２との作用を受けて、駆
動連結板１３を介してガス抜き弁２を弁動作させるため
のものであり、ガス抜き弁２と並列平行状に設置する。
即ち、前ハウジングブロック１ａの型合わせ面６から後
側ハウジングブロック１ｂにわたって、ガス抜き弁２の
バルブシリンダ部９と並列平行状に水平方向にシリンダ
部１４を開口形成せしめ、そのシリンダ部１４内に受圧
ピストン３を軸方向に摺動自在に設置すると共に、その
受圧部３ａをシリンダ部１４内からガス抜き溝８内へ出
没自在となすものである。Further, the pressure receiving piston 3 is driven by the action of the molten metal m that has risen from the die cavity 7 in the gas vent groove 8 and the biasing means 12 that biases and presses it toward the die mating surface 6. This is for operating the gas vent valve 2 through the connecting plate 13, and is installed in parallel with the gas vent valve 2.
That is, a cylinder portion 14 is horizontally formed in parallel with the valve cylinder portion 9 of the degassing valve 2 from the mold matching surface 6 of the front housing block 1a to the rear housing block 1b. The pressure receiving piston 3 is installed slidably in the axial direction, and the pressure receiving portion 3a thereof can be retracted from the cylinder portion 14 into the degassing groove 8.
【００１１】この受圧ピストン３のシリンダ部１４に
は、エアーブロー用の通路１５を連通形成し、そのエア
ーブロー用通路１５にエアーホースを連通接続せしめ
て、受圧ピストン３の受圧部３ａがガス抜き溝８内に突
出してシリンダ部１４が開口している時に、シリンダ部
１４内周面ないし受圧ピストン３の受圧部３ａ外周をエ
アーブローするようになす。An air blow passage 15 is formed in communication with the cylinder portion 14 of the pressure receiving piston 3, and an air hose is connected in communication with the air blow passage 15, so that the pressure receiving portion 3a of the pressure receiving piston 3 is degassed. When the cylinder portion 14 projects into the groove 8 and opens, the inner peripheral surface of the cylinder portion 14 or the outer periphery of the pressure receiving portion 3a of the pressure receiving piston 3 is blown with air.
【００１２】また、受圧ピストン３の基端部には、受圧
ピストン３とガス抜き弁２を連結させるための駆動連結
板１３を設ける。駆動連結板１３は、図示実施例では受
圧ピストン３と同一体に形成し、その周縁部にガス抜き
弁２及びガイドピストン１６を一体的に連結取付けると
共に、背面側にこの駆動連結板１３を型合わせ面６方へ
付勢押圧するための付勢手段１２を当接させる。A drive connecting plate 13 for connecting the pressure receiving piston 3 and the degassing valve 2 is provided at the base end of the pressure receiving piston 3. In the illustrated embodiment, the drive connecting plate 13 is formed in the same body as the pressure receiving piston 3, and the gas vent valve 2 and the guide piston 16 are integrally connected and attached to the peripheral portion thereof, and the drive connecting plate 13 is formed on the back side. A biasing means 12 for biasing and pressing the mating surface 6 is brought into contact.
【００１３】付勢手段１２は、筒部12a 内に駆動連結板
１３を軽く型合わせ面６方へ押圧するためのスプリング
１７を配置すると共に、筒部12a の先端に駆動連結板１
３の外径よりも少し小径に形成したフランジ部12b の背
面側に皿バネ等の強い弾発力を有するバネ１８を配置し
て構成され、フランジ部12b の正面側には当該付勢手段
１２を押し戻すためのプッシュロッド１９を当接させ
る。The urging means 12 has a spring 17 for lightly pressing the drive connecting plate 13 toward the mold matching surface 6 in the tubular portion 12a, and the drive connecting plate 1 is provided at the tip of the tubular portion 12a.
3, a spring 18 having a strong elastic force, such as a disc spring, is arranged on the back side of the flange 12b formed to have a diameter slightly smaller than the outer diameter of 3, and the biasing means 12 is provided on the front side of the flange 12b. The push rod 19 for pushing back is brought into contact.
【００１４】尚、上記スプリング１７は、金型キャビテ
ィ７からガス抜き溝８を上昇して来た溶湯が受圧ピスト
ン３の受圧部３ａを押圧するまでの間ガス抜き弁２を開
弁状態に保持し溶湯が受圧ピストン３の受圧部３ａを押
圧したら容易に押し戻される程度に弱いバネ力に設定
し、また上記バネ１８は、ガス抜き溝８内で凝固した溶
湯、すなわち受圧ピストン３の受圧部３ａを押圧した溶
湯がガス抜き溝８内で凝固した凝固物を押出せる程度に
強力なバネ力に設定する。The spring 17 holds the gas vent valve 2 in the open state until the molten metal rising from the die cavity 7 in the gas vent groove 8 presses the pressure receiving portion 3a of the pressure receiving piston 3. The spring 18 is set to have a weak spring force so that it can be easily pushed back when the pressure receiving portion 3a of the pressure receiving piston 3 is pressed. The spring force is set so strong that the molten metal pressed against can extrude the solidified material solidified in the gas vent groove 8.
【００１５】プッシュロッド１９は、金型４ａ，４ｂの
型閉め力を媒介して押出盤１２を背面側へ押し戻すため
のものであり、その一端19a を押出盤１２に受圧ピスト
ン３の駆動連結板１３を貫通させて当接させると共に、
他端19b を型合わせ面６から突出させ、且つ一端側に受
圧ピストン３の駆動連結板１３に当接係合する当接段部
２０を形成してなる。The push rod 19 is for pushing back the extrusion board 12 to the back side through the die closing force of the molds 4a and 4b, and one end 19a of the push rod 19 is connected to the extrusion board 12 by the drive connecting plate of the pressure receiving piston 3. While penetrating 13 to abut,
The other end 19b is made to project from the mold matching surface 6, and an abutting step portion 20 which abuts and engages with the drive connecting plate 13 of the pressure receiving piston 3 is formed at one end side.
【００１６】この当接段部２０は、金型４ａ，４ｂの型
閉め動作前には駆動連結板１３に当接係合せず、型閉め
時に駆動連結板１３を押圧して受圧ピストン３の受圧部
３ａがシリンダ部１４内に没入するように設定形成され
る。即ち、金型４ａ，４ｂの型閉め動作時において、プ
ッシュロッド１９が型合わせ面６より没入する直前まで
は受圧ピストン３の受圧部３ａがガス抜き溝８内に突出
していて、この当接段部２０でもって駆動連結板１３が
背面側へ押圧された時に受圧ピストン３の受圧部３ａが
シリンダ部１４内に没入するように設定形成されるもの
である。The contact step portion 20 does not abut and engage the drive connecting plate 13 before the mold closing operation of the molds 4a and 4b, but presses the drive connecting plate 13 when the mold is closed to receive the pressure of the pressure receiving piston 3. The portion 3 a is set and formed so as to be immersed in the cylinder portion 14. That is, during the mold closing operation of the molds 4a and 4b, the pressure receiving portion 3a of the pressure receiving piston 3 projects into the degassing groove 8 until just before the push rod 19 is retracted from the mold matching surface 6, and this contact step The pressure receiving portion 3a of the pressure receiving piston 3 is so set as to be recessed in the cylinder portion 14 when the drive connecting plate 13 is pressed to the back side by the portion 20.
【００１７】尚、図１において、プッシュロッド１９が
ガス抜き弁２と受圧ピストン３の中間位置に配置されて
いるが、これは本発明の理解を容易にするためのもので
あり、実際には、図２に示す如く、受圧ピストン３の左
右にあって受圧ピストン３や駆動連結板１３，ガス抜き
弁２等をバランス良く押し戻すことが可能な位置に配置
される。In FIG. 1, the push rod 19 is arranged at an intermediate position between the gas vent valve 2 and the pressure receiving piston 3, but this is for the purpose of facilitating the understanding of the present invention. As shown in FIG. 2, the pressure receiving pistons 3, the drive connecting plate 13, the degassing valve 2 and the like are arranged on the left and right sides of the pressure receiving piston 3 at positions where they can be pushed back in a well-balanced manner.
【００１８】而して、以上のように構成された金型用ガ
ス抜き装置の動作を説明する。図１は、金型４ａ，４ｂ
が開いてガス抜き弁２が開弁状態にあり、受圧ピストン
３の受圧部３ａがガス抜き溝８内に突出している所期状
態である。この状態時に、ガス抜き弁２のエアーブロー
用通路１１に圧搾エアーを供給してガス抜き弁２のバル
ブシリンダ部９内周面ないしガス抜き弁２の弁頭２ａ外
周をエアーブローすると共に、受圧ピストン３のエアー
ブロー用通路１５に圧搾エアーを供給して受圧ピストン
３のシリンダ部１４内周面ないし受圧ピストン３の受圧
部３ａ外周をエアーブローする。The operation of the die degassing device constructed as described above will be described. FIG. 1 shows the molds 4a and 4b.
Is open and the gas vent valve 2 is in the open state, and the pressure receiving portion 3a of the pressure receiving piston 3 projects into the gas vent groove 8 in an intended state. In this state, compressed air is supplied to the air blow passage 11 of the gas vent valve 2 to blow air on the inner peripheral surface of the valve cylinder portion 9 of the gas vent valve 2 or the outer periphery of the valve head 2a of the gas vent valve 2 and receive pressure. Compressed air is supplied to the air blow passage 15 of the piston 3 to blow air on the inner peripheral surface of the cylinder portion 14 of the pressure receiving piston 3 or the outer periphery of the pressure receiving portion 3a of the pressure receiving piston 3.
【００１９】次に、金型４ａ，４ｂの型閉め動作が開始
されると、図３に示す如く、金型（可動型）４ｂがプッ
シュロッド１９の他端19b に当接して、プッシュロッド
１９が型合わせ面６から奥行方向へと押圧される。する
と、金型４ａ，４ｂの型閉め動作が進行するに連れて、
プッシュロッド１９の一端19a でもって付勢手段１２が
バネ１８の力に抗して背面側へ押し戻されると共に、プ
ッシュロッド１９の当接段部２０が駆動連結板１３に当
接係合して、駆動連結板１３が背面側へ押し戻される。Next, when the mold closing operation of the molds 4a and 4b is started, the mold (movable mold) 4b contacts the other end 19b of the push rod 19 as shown in FIG. Is pressed from the mold matching surface 6 in the depth direction. Then, as the mold closing operation of the molds 4a and 4b progresses,
The biasing means 12 is pushed back to the back side against the force of the spring 18 by the one end 19a of the push rod 19, and the contact step portion 20 of the push rod 19 abuts and engages with the drive connecting plate 13. The drive connecting plate 13 is pushed back to the back side.
【００２０】そして、金型４ａ，４ｂの型閉め動作が終
了すると、図４に示す如く、プッシュロッド１９が前側
ハウジングブロック１ａ内に没入し、駆動連結板１３が
プッシュロッド１９の当接段部２０とスプリング１７で
その動きが規制された状態となると共に、受圧ピストン
３の受圧部３ａがシリンダ部１４内に没入し、またガス
抜き弁の弁頭２ａがバルブシリンダ部９の弁口９ａ近傍
に位置して開弁状態を保持した状態となる。When the mold closing operation of the molds 4a and 4b is completed, the push rod 19 is retracted into the front housing block 1a, and the drive connecting plate 13 is brought into contact with the push rod 19, as shown in FIG. 20 and the movement of the spring 17 are restricted, the pressure receiving portion 3a of the pressure receiving piston 3 is retracted into the cylinder portion 14, and the valve head 2a of the gas vent valve is located near the valve opening 9a of the valve cylinder portion 9. The valve is opened and the valve is kept open.
【００２１】この状態で、金型キャビティ７内に溶湯を
射出充填すると、金型キャビティ７内のガスや空気はガ
ス抜き溝８からガス抜き弁２の弁口９ａを通り、バルブ
シリンダ部９に連通した排気用通路１０を経て外部へ排
出される。他方、溶湯ｍの一部はガス抜き溝８を上昇し
て受圧ピストン３の受圧部３ａに当り、その衝撃力によ
り、図５に示す如く、駆動連結板１３がスプリング１７
の力に抗して背面側へ押圧され、それに伴ってガス抜き
弁の弁頭２ａがバルブシリンダ部９内に没入して弁口９
ａの閉弁状態が保持される。この際、受圧ピストン３を
後退させた溶湯ｍは、閉弁状態となったガス抜き弁２が
あるガス抜き溝８’まで到達する。In this state, when the mold cavity 7 is injected and filled with molten metal, the gas and air in the mold cavity 7 pass from the gas vent groove 8 through the valve port 9a of the gas vent valve 2 to the valve cylinder portion 9. It is discharged to the outside through the communicating exhaust passage 10. On the other hand, part of the molten metal m ascends in the gas vent groove 8 and hits the pressure receiving portion 3a of the pressure receiving piston 3, and the impact force thereof causes the drive connecting plate 13 to move the spring 17 as shown in FIG.
The valve head 2a of the gas vent valve is retracted into the valve cylinder portion 9 and is pushed toward the rear side against the force of the valve opening 9
The valve closed state of a is maintained. At this time, the molten metal m having the pressure receiving piston 3 retracted reaches the gas vent groove 8'in which the gas vent valve 2 is in the closed state.
【００２２】そして、金型キャビティ７内の溶湯が所定
時間冷却されて凝固すると、ガス抜き溝８内の溶湯も凝
固するので、その後金型キャビティ４ａ，４ｂを型開き
すると、プッシュロッド１９が開放され、バネ１８の力
により付勢手段１２を介してプッシュロッド１９及び駆
動連結板１３が再び型合わせ面６方へ押し戻される。す
ると、ガス抜き弁２がガス抜き溝８内に突出して開弁状
態に復帰すると共に、受圧ピストン３の受圧部３ａもガ
ス抜き溝８内に突出して、元の状態すなわち図１の状態
に復帰する。以下、上述した動作を繰り返す。When the molten metal in the mold cavity 7 is cooled and solidified for a predetermined time, the molten metal in the degassing groove 8 is also solidified. Therefore, when the mold cavities 4a and 4b are subsequently opened, the push rod 19 is opened. Then, by the force of the spring 18, the push rod 19 and the drive connecting plate 13 are pushed back toward the mold matching surface 6 again via the biasing means 12. Then, the gas vent valve 2 projects into the gas vent groove 8 and returns to the open state, and the pressure receiving portion 3a of the pressure receiving piston 3 also projects into the gas vent groove 8 and returns to the original state, that is, the state of FIG. To do. Hereinafter, the above operation is repeated.
【００２３】[0023]
【発明の効果】本発明の金型用ガス抜き装置は斯様に構
成したので、鋳造サイクル毎に、受圧ピストンをガス抜
き溝内に突出させてそのシリンダ部内周面ないし受圧ピ
ストンの受圧部外周をエアーブローすることが可能とな
る。従って、金型キャビティからガス抜き溝を上昇して
来た溶湯が受圧ピストンを押圧した際に受圧ピストンの
受圧部外周に鋳ばりが発生しても、その鋳ばりは鋳造サ
イクル毎にエアーブローされて外部へ吹き飛されてしま
い、その結果、受圧ピストンとそのシリンダ内周面との
間に鋳ばりが差込んで動作不良を起すような惧れがなく
なり、長期に亘って安定したガス抜き動作を行なうこと
が出来るようになる。Since the die degassing apparatus of the present invention is constructed as described above, the pressure receiving piston is projected into the gas releasing groove and the inner peripheral surface of the cylinder portion or the outer periphery of the pressure receiving portion of the pressure receiving piston is provided for each casting cycle. It is possible to blow air. Therefore, even if flash occurs on the outer circumference of the pressure receiving part of the pressure receiving piston when the molten metal that has risen from the mold cavity and presses the pressure receiving piston, the flash will be blown with air every casting cycle. As a result, there is no fear that the flash will be inserted between the pressure receiving piston and the inner peripheral surface of the cylinder to cause malfunction, and stable degassing operation will be achieved for a long period of time. Will be able to do.
【図１】 本発明実施の一例を示す断面図で、型開き
した所期状態を示す。FIG. 1 is a cross-sectional view showing an example of the present invention, showing a desired state where a mold is opened.
【図２】 図１の正面図。FIG. 2 is a front view of FIG.
【図３】 図１と同様の断面図で、型閉め進行状態を
示す。FIG. 3 is a sectional view similar to FIG. 1, showing a mold closing progress state.
【図４】 図１と同様の断面図で、型閉め終了状態を
示す。FIG. 4 is a cross-sectional view similar to FIG. 1, showing a mold closing completion state.
【図５】 図１と同様の断面図で、ガス抜き溝を溶湯
が上昇して来た状態を示す。5 is a sectional view similar to FIG. 1, showing a state in which the molten metal has risen in the gas vent groove.
【図６】 従来例を示す断面図で、型開きした所期状
態を示す。FIG. 6 is a cross-sectional view showing a conventional example, showing a desired state where the mold is opened.
２：ガス抜き弁 ２ａ：弁頭 ３：受圧ピストン ３ａ：受圧部 ４ａ，４ｂ：金型 ６：型合わせ
面 ７：キャビティ ８：ガス抜き
溝 １２：付勢手段 １３：駆動連
結板 １４：シリンダ部 １５：エアー
ブロー用通路 １９：プッシュロッド2: Gas vent valve 2a: Valve head 3: Pressure receiving piston 3a: Pressure receiving portion 4a, 4b: Mold 6: Mold matching surface 7: Cavity 8: Gas vent groove 12: Energizing means 13: Drive connecting plate 14: Cylinder portion 15: Air blow passage 19: Push rod
Claims (1)
ガス抜き溝を形成し、該ガス抜き溝の終端部に型合わせ
面から奥行方向にわたりガス抜き弁を設置すると共に、
該ガス抜き溝途上には受圧ピストンを上記ガス抜き弁と
並列平行状に設置し、上記受圧ピストンの基端部に設け
た駆動連結板を前記ガス抜き弁に連結させ、且つ上記駆
動連結板を型合わせ面方へ付勢押圧するための付勢手段
にプッシュロッドの先端を当接せしめ、該プッシュロッ
ドの他端を前記型合わせ面から突出させ、型閉め時に上
記付勢手段を上記プッシュロッドで押し戻し、金型キャ
ビティから前記ガス抜き溝を上昇して来た溶湯が上記受
圧ピストンの受圧部を押圧することにより上記駆動連結
板を介して前記ガス抜き弁が閉弁状態とされる金型用ガ
ス抜き装置において、前記受圧ピストンのシリンダ部内
に通じるエアーブロー用通路を形成し、該受圧ピストン
の受圧部をそのシリンダ部から前記ガス抜き溝内へ出没
自在となし、前記プッシュロッドの一端を前記駆動連結
板を貫通させて前記付勢手段に当接させると共に、該プ
ッシュロッドの一端側に前記駆動連結板に当接係合する
当接段部を形成せしめ、型閉め時に上記プッシュロッド
の当接段部でもって前記駆動連結板が押圧された時に前
記受圧ピストンの受圧部がシリンダ部内に没入するよう
に形成した事を特徴とする金型用ガス抜き装置。1. A gas vent groove communicating with a cavity of a mold is formed on a die mating surface, and a gas vent valve is installed at a terminal end of the gas vent groove from the die mating surface to a depth direction.
A pressure receiving piston is installed in parallel with the gas venting valve in parallel with the gas venting groove, a drive connecting plate provided at a base end portion of the pressure receiving piston is connected to the gas venting valve, and the drive connecting plate is provided. The tip of the push rod is brought into contact with a biasing means for biasing and pressing toward the mold matching surface, the other end of the push rod is projected from the mold matching surface, and when the mold is closed, the biasing means is pressed against the push rod. The mold in which the degassing valve is closed via the drive connecting plate by pressing the pressure receiving part of the pressure receiving piston by the molten metal which has been pushed back by In the gas venting apparatus for air, an air blow passage communicating with the cylinder portion of the pressure receiving piston is formed, and the pressure receiving portion of the pressure receiving piston is freely retractable from the cylinder portion into the gas venting groove. One end of the push rod penetrates the drive connecting plate to abut against the urging means, and an abutting step portion that abuts and engages with the drive connecting plate is formed on one end side of the push rod to close the mold. A die degassing device, wherein the pressure receiving portion of the pressure receiving piston is formed so as to be recessed in the cylinder portion when the drive connecting plate is pressed by the contact step portion of the push rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32810594A JP3415695B2 (en) | 1994-12-28 | 1994-12-28 | Degassing device for mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32810594A JP3415695B2 (en) | 1994-12-28 | 1994-12-28 | Degassing device for mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08174180A true JPH08174180A (en) | 1996-07-09 |
| JP3415695B2 JP3415695B2 (en) | 2003-06-09 |
Family
ID=18206562
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32810594A Expired - Fee Related JP3415695B2 (en) | 1994-12-28 | 1994-12-28 | Degassing device for mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3415695B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009050895A (en) * | 2007-08-28 | 2009-03-12 | Die Engineering:Kk | Degassing device, pressure receiving valve, and method for stably operating valve |
-
1994
- 1994-12-28 JP JP32810594A patent/JP3415695B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009050895A (en) * | 2007-08-28 | 2009-03-12 | Die Engineering:Kk | Degassing device, pressure receiving valve, and method for stably operating valve |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3415695B2 (en) | 2003-06-09 |
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