JP2010172898A - Venting device of chill vent for die casting - Google Patents
Venting device of chill vent for die casting Download PDFInfo
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本発明はダイキャストの金型内部のガス抜きを行い、その鋳造品に巣がなく、且つ金型外部へ溶湯を流出させないために設けたチルベントのガス抜き装置に関する。 The present invention relates to a gas venting device for a chill vent provided for venting the inside of a die-casting die so that the cast product has no nest and the molten metal does not flow out of the die.
従来のチルベントの構造は、固定型と可動型から成るオス型チルブロックとメス型チルブロックの対向面に連続する波形状のガス抜き通路を設けたものであり、ガス抜き通路の断面形状は三角状や四角形状などの山形状であった。この時のガス抜き通路の隙間が０．６ｍｍ〜０．７ｍｍのものであるが、このチルベントのガス抜き通路の隙間を小さくし、山形状の角度を急峻にすれば、溶湯の排出抵抗が大きくなって流出の防止が可能となる反面、ガス排出効果が低下し、良好な鋳造品が得られなくなってしまう。また溶湯が金型外部へ流出することを防止するために、ガス抜き通路の長さを長くすれば良いが、チルベントの大型化を余儀なくされ、近年の小型化志向に応えられないものとなってしまう。このため、本発明者が特願２００６−２６６４９８や実願２００６−００７２３６（実用新案登録第３１２７０３１号）で山形状の中間部に折曲部が設けられたチルベントを提案したところである。これはチルブロックの全体の長さを短くさせてコンパクトにでき、設置しても金型ベースから突出せず、且つ強制的に冷却して金型外部へ流出する前に確実に凝固させて溶湯の流出防止が可能になるものであった。尚、前記チルベントには、真空ポンプに接続して使用する場合もあった。 The structure of the conventional chill vent is a structure in which a wave-shaped gas vent passage is provided on the opposing surfaces of a male chill block and a female chill block that are fixed and movable, and the cross-sectional shape of the gas vent passage is triangular. It was a mountain shape such as a square shape or a square shape. The gap of the gas vent passage at this time is 0.6 mm to 0.7 mm. If the gap of the gas vent passage of the chill vent is made small and the angle of the mountain shape is steep, the discharge resistance of the molten metal becomes large. Thus, the outflow can be prevented, but the gas discharge effect is lowered, and a good cast product cannot be obtained. Moreover, in order to prevent the molten metal from flowing out of the mold, the length of the gas vent passage may be increased. However, the chill vent must be increased in size and cannot meet the recent trend toward downsizing. End up. For this reason, the present inventor has proposed a chill vent in which a bent portion is provided in an intermediate portion of a mountain shape in Japanese Patent Application No. 2006-266498 and Japanese Patent Application No. 2006-007236 (utility model registration No. 3127031). This can reduce the overall length of the chill block and make it compact. Even if it is installed, it will not protrude from the mold base, and it will be solidified before it is forced to cool and flow out of the mold. It was possible to prevent the spillage. In some cases, the chill vent is connected to a vacuum pump.
しかし、前記チルベントのガス抜き通路の隙間が０．７ｍｍ前後になると、アルミニウムなどの溶湯が外部へ流出する恐れがあった。またチルベントに真空ポンプが接続されている場合、細かなダストが真空ポンプの中に入る恐れがあるため、故障が生じ易くなり、定期的な点検や修理が必要であった。又、前記チルベントのガス抜き通路の隙間が０．６ｍｍ〜０．７ｍｍのものは、山形状の溝に凝固した材料が貼り付いて取りにくくなると共に折れる場合もあるため、ダイキャストの生産を一時停止させて貼り付いた材料を手作業で取り除かなければならなかった。特に貼り付いたまま自動生産する時は大量の製品が不良となり、ダイキャストの生産性が急激に低下し、コストアップになっていた。このため、前記チルベントのガス抜き通路の隙間が０．７ｍｍ以上になってもアルミニウムなどの溶湯が外部へ流出せず、且つ、チルベントの山形状の溝に凝固した材料が容易に取り除かれ、また細かなダストが真空ポンプに入らなくなり、ダイキャストの生産性の急激な低下を防止できる方法や装置の開発が作業者やダイキャスト工場側から要望されていた。 However, when the clearance of the gas vent passage of the chill vent is about 0.7 mm, molten metal such as aluminum may flow out to the outside. In addition, when a vacuum pump is connected to the chill vent, fine dust may enter the vacuum pump, so that failure is likely to occur, and periodic inspections and repairs are necessary. In addition, if the clearance between the vent holes of the chill vent is 0.6 mm to 0.7 mm, the solidified material sticks to the mountain-shaped groove and it may be difficult to remove and may be broken. The material stuck and stuck had to be removed manually. In particular, when auto-manufacturing with sticking, a large number of products became defective, and die-casting productivity dropped sharply, resulting in an increase in cost. For this reason, even if the clearance of the gas vent passage of the chill vent becomes 0.7 mm or more, the molten metal such as aluminum does not flow to the outside, and the material solidified in the mountain-shaped groove of the chill vent is easily removed. There has been a demand for the development of a method and an apparatus that can prevent the fine dust from entering the vacuum pump and prevent a sudden drop in the productivity of the die-casting.
尚、チルベントのガス抜き装置以外に、金型用ガス抜き装置として特開２００２−１４４００８などがある。この構造は図３に示すように、固定型（１’）と可動型（２’）の間にキャビティに連通する排気通路（３’）を備え、固定型（１’）に、排気通路（３’）の入口側に配置する受圧バルブ（４）と出口側に配置する閉鎖バルブ（５）、及び受圧バルブ（４）の作動を閉鎖バルブ（５）に伝える開閉レバー（６）を備え、且つ受圧バルブ（４）と閉鎖バルブ（５）との間に、開閉レバー（６）を閉鎖バルブ（５）の開方向に押圧する開放機能部（７’）と、開閉レバー（６）を閉鎖バルブ（５）の閉方向に押圧する閉鎖機能部とを備え、可動型（２’）に型開時に排気通路（３’）内で凝固した余剰材料を外部に押し出す押出ピンを備えたものである。尚、前記金型用ガス抜き装置は、開閉レバー（６）の支点が端部になっており、本発明品の支点が中央部であるのとは異なると共にチルベントにガス抜き装置として取付ける記載やそのような発想がないものであった。 In addition to the chill vent degassing apparatus, there is JP 2002-144008 as a degassing apparatus for a mold. As shown in FIG. 3, this structure includes an exhaust passage (3 ′) communicating with the cavity between the fixed mold (1 ′) and the movable mold (2 ′), and the fixed mold (1 ′) has an exhaust passage ( 3 ′) a pressure receiving valve (4) disposed on the inlet side, a closing valve (5) disposed on the outlet side, and an opening / closing lever (6) for transmitting the operation of the pressure receiving valve (4) to the closing valve (5), And between the pressure receiving valve (4) and the closing valve (5), the opening / closing lever (6) is pressed in the opening direction of the closing valve (5), and the opening / closing lever (6) is closed. A closing function portion that presses the valve (5) in the closing direction, and a movable die (2 ′) provided with an extrusion pin for extruding the surplus material solidified in the exhaust passage (3 ′) when the die is opened. is there. The mold degassing device has a fulcrum of the opening / closing lever (6) as an end, and the fulcrum of the present invention is different from the central portion and is attached to the chill vent as a degassing device. There was no such idea.
又、この金型用ガス抜き装置の動きは、鋳造始め（試運転時）に於いては、閉鎖バルブ（５）の開放状態で溶湯をキャビティに注入すると、キャビティ内のガスが図３（ａ）に示す矢印のように入口側の排出通路（３’）から閉鎖バルブ（５）を経て出口側より流出する。更に溶湯を注入させると、キャビティ内から溢れた溶湯が排気通路（３’）に流入し、その圧力で受圧バルブ（４）が押下げられて開閉レバー（６）を押し下げる。この時、金型が設定温度になるまで溶湯を低速でキャビティに充填するので、受圧バルブ（４）を押す力が通常運転時に比べて低く、閉鎖バルブ（５）の作動が不完全になって、溶湯が出口側から流出する。このため、試運転時には、閉鎖機能部を図３（ｂ）の白抜き矢印のように作動させて、開閉レバー（６）が強制的に押圧され且つ閉鎖バルブ（５）を閉じることにより、排気通路（３’）の閉鎖が強制的に行われ、溶湯を出口側から外部へ流出することを防止させていた。この閉鎖機能部は金型が冷えている運転初期（試運転時）のみ閉鎖バルブ（５）を強制的に閉じ、受圧バルブ（４）の作動を補うためのものであり、エアーシリンダーなどで作動させていた。従って、前記閉鎖機能部は通常運転時に於いてはエアーシリンダーなどによって閉鎖バルブ（５）を元の位置に戻し、その後は溶湯圧が高くなるため、閉鎖機能部は作動させないものであった。 In addition, when the molten metal is injected into the cavity with the closing valve (5) opened at the beginning of casting (at the time of trial operation), the gas in the cavity is changed as shown in FIG. Flows out from the outlet side through the closing valve (5) from the discharge passage (3 ') on the inlet side as shown by the arrow in FIG. When the molten metal is further injected, the molten metal overflowing from the cavity flows into the exhaust passage (3 '), and the pressure receiving valve (4) is pushed down by the pressure to push down the opening / closing lever (6). At this time, since the molten metal is filled into the cavity at a low speed until the mold reaches the set temperature, the force pushing the pressure receiving valve (4) is lower than that during normal operation, and the operation of the closing valve (5) becomes incomplete. The molten metal flows out from the outlet side. For this reason, at the time of trial operation, the closing function portion is operated as indicated by the white arrow in FIG. 3B, the opening / closing lever (6) is forcibly pressed and the closing valve (5) is closed, whereby the exhaust passage (3 ′) was forcibly closed to prevent the molten metal from flowing out from the outlet side. This closing function part is for forcibly closing the closing valve (5) only in the initial stage of operation when the mold is cold (during trial operation), and supplementing the operation of the pressure receiving valve (4). It was. Accordingly, during the normal operation, the closing function portion is returned to the original position by an air cylinder or the like, and thereafter, the molten metal pressure becomes high, so that the closing function portion is not operated.
このため特開２００２−１４４００８は、閉鎖機能部が必ず設けられると共にその操作を通常運転時まで行わなければならず、製品のコストアップになっていた。しかも閉鎖機能部に対向させて開放機能部（７’）が設けられているので、コンパクト化が難しいものであった。 For this reason, in Japanese Patent Laid-Open No. 2002-144008, a closing function unit is always provided and the operation must be performed until normal operation, which increases the cost of the product. In addition, since the opening function portion (7 ') is provided to face the closing function portion, it is difficult to make it compact.
本発明は鋳造の試運転時にチルベントのガス抜き通路の隙間が０．７ｍｍ以上になってもアルミニウムなどの溶湯は外部へ流出せず、且つ、チルベントの山形状の溝に凝固した材料が容易に取り除かれて、ダイキャストの生産性が向上可能なものとなると共に真空ポンプの中に細かなダストが入ることを防止出来るダイキャスト用チルベントのガス抜き装置を提供することを目的とする。 In the present invention, even when the clearance of the chill vent degassing passage becomes 0.7 mm or more during the trial run of casting, molten metal such as aluminum does not flow to the outside, and the solidified material is easily removed in the chevron-shaped groove of the chill vent. Therefore, an object of the present invention is to provide a die-casting chill vent degassing device capable of improving die-casting productivity and preventing fine dust from entering the vacuum pump.
本発明は上記要望に応えるために成されたものであり、つまり、ダイキャスト用チルベントの固定型チルブロックに、ガス抜き通路の入口側に受圧バルブを配置すると共に出口側に閉鎖バルブを配置させ、且つ、受圧バルブの作動を閉鎖バルブに伝える揺動可能な開閉レバーを備えると共に該開閉レバーの中央部が固定型チルブロックに軸支され、前記受圧バルブと閉鎖バルブとの間に、開閉レバーが閉鎖バルブの開方向に押圧されるコイルバネなどの開放手段を備えた構造とする。また前記開閉レバーの中央部及び両端部の接触面を曲面状に形成させると良い。 The present invention has been made to meet the above-mentioned demand. That is, in the fixed chill block of the die-cast chill vent, a pressure receiving valve is arranged on the inlet side of the gas vent passage and a closing valve is arranged on the outlet side. And a swingable opening / closing lever for transmitting the operation of the pressure receiving valve to the closing valve, and a central portion of the opening / closing lever is pivotally supported by a fixed chill block, and the opening / closing lever is provided between the pressure receiving valve and the closing valve. Is provided with an opening means such as a coil spring that is pressed in the opening direction of the closing valve. Moreover, it is preferable to form the contact surface of the center part and both ends of the opening / closing lever in a curved shape.
請求項１のように固定型チルブロック（１）に、ガス抜き通路（３）の入口側に受圧バルブ（４）を配置すると共に出口側に閉鎖バルブ（５）を配置させ、且つ受圧バルブ（４）の作動を閉鎖バルブ（５）に伝える揺動可能な開閉レバー（６）を備えると共に該開閉レバー（６）の中央部（61）が固定型チルブロック（１）に軸支されて支点とすることにより、受圧バルブ（４）に加わる溶湯の圧力が略同一に閉鎖バルブ（５）にも伝わるので、鋳造の試運転時に加わる溶湯の圧力が小さくても確実に閉鎖バルブ（５）が作動されるので、従来の如き閉鎖機能部が不要となり、コストダウンが可能になると共にコンパクト化が可能になる。更にチルベントのガス抜き通路（３）の隙間を０．７ｍｍ以上にしても溶湯は出口側から流出せず、また凝固した材料がチルベントの山形状の溝から容易に且つ確実に取り除かれて、従来の如きダイキャストの生産をストップさせる恐れがなくなり、真空ポンプの中に細かなダストが入る恐れもなくなるものとなる。又、前記受圧バルブ（４）と閉鎖バルブ（５）との間に、開閉レバー（６）が閉鎖バルブ（５）の開方向に押圧される開放手段（７）を備えることにより、溶湯が受圧バルブ（４）に加圧する前は必ず開放手段（７）が開かれ、鋳造の試運転時及び通常運転時に良好なガス排出が行えるものとなる。 In the fixed chill block (1) as in claim 1, the pressure receiving valve (4) is arranged on the inlet side of the gas vent passage (3) and the closing valve (5) is arranged on the outlet side, and the pressure receiving valve ( 4) A swingable opening / closing lever (6) for transmitting the operation of 4) to the closing valve (5) is provided, and a central portion (61) of the opening / closing lever (6) is pivotally supported by the fixed chill block (1). By doing so, the pressure of the molten metal applied to the pressure receiving valve (4) is transmitted to the closing valve (5) substantially in the same manner, so that the closing valve (5) is surely operated even if the pressure of the molten metal applied during the trial run of casting is small. As a result, the conventional closing function portion is not necessary, and the cost can be reduced and the size can be reduced. Furthermore, even if the clearance of the chill vent degassing passage (3) is 0.7 mm or more, the molten metal does not flow out from the outlet side, and the solidified material is easily and reliably removed from the chill vent groove. There is no risk of stopping the production of die castings, and there is no risk of fine dust entering the vacuum pump. The open / close lever (6) is provided between the pressure receiving valve (4) and the closing valve (5) so that the open / close lever (6) is pressed in the opening direction of the closing valve (5), so that the molten metal receives pressure. Before pressurizing the valve (4), the opening means (7) is always opened, so that good gas discharge can be performed during the trial run and normal run of casting.
請求項２のように開閉レバー（６）の中央部（61）及び両端部（62）の接触面が曲面状に形成されることにより、開閉レバー（６）による作動が、受圧バルブ（４）と閉鎖バルブ（５）に加わる溶湯の圧力が略同一の大きさで確実に伝わるものとなるため、従来の特開２００２−１４４００８のものよりも半分以下の圧力で閉鎖バルブ（５）の作動が可能となると共に開閉レバー（６）の接触面の抵抗が減少されることにより、鋳造の試運転時であっても確実に閉鎖バルブ（５）が作動され、チルベントのガス抜き通路（３）の隙間を０．７ｍｍ以上にさせても出口側に溶湯が流出する心配はなくなるものとなる。 Since the contact surface of the center part (61) and both end parts (62) of the opening / closing lever (6) is formed in a curved surface as in claim 2, the operation by the opening / closing lever (6) is performed by the pressure receiving valve (4). Therefore, the pressure of the molten metal applied to the closing valve (5) is reliably transmitted with substantially the same magnitude, so that the operation of the closing valve (5) is performed with a pressure less than half that of the conventional Japanese Patent Application Laid-Open No. 2002-144008. The resistance of the contact surface of the opening / closing lever (6) is reduced and the closing valve (5) is reliably operated even during the trial run of casting, and the clearance of the chill vent venting passage (3) Even if the thickness is made 0.7 mm or more, there is no fear that the molten metal flows out to the outlet side.
請求項３に示すように開放手段（７）をコイルバネとすることにより、その取付けが簡単であると共に構造も殆ど複雑にならないので、故障が少なく且つ安価に製作出来るものとなる。 According to the third aspect of the present invention, the opening means (7) is a coil spring, so that the mounting is simple and the structure is hardly complicated.
ダイキャスト用チルベントの隙間を大きくさせることが可能となり、ダイキャストの金型内部のガス抜きを確実に行い、その鋳造品に巣がなく、且つ金型外部へ溶湯を流出させないガス抜き装置を実現した。 The gap between the die-cast chill vents can be increased, the gas inside the die-cast mold is surely vented, and the cast product has no nest and does not allow the molten metal to flow out of the mold. did.
図１は、本発明の１実施例の断面図であり、（１）はダイキャスト用チルベントの固定型チルブロックであり、（２）は可動型チルブロックである。（３）は固定型チルブロック（１）と可動型チルブロック（２）の間に、金型に形成されたキャビティに連通する連続した山形状のガス抜き通路であり、該ガス抜き通路（３）の隙間は０．６ｍｍ〜２ｍｍのものとするのが好ましいが、この範囲に限定されるものではない。又、前記ガス抜き通路（３）の断面形状は三角状や四角形状などの山形状であるが、本発明者が特願２００６−２６６４９８や実願２００６−００７２３６（実用新案登録第３１２７０３１号）で提案したように、山形状の中間部に折曲部が設けられたものとしても良い。（４）はガス抜き通路（３）の入口側に配置した受圧バルブであり、該受圧バルブ（４）は固定型チルブロック（１）に配置され、上下動可能であると共に下部には後述する開閉レバー（６）の端部（62）を挿入させる挿入部が形成されている。 FIG. 1 is a cross-sectional view of an embodiment of the present invention, where (1) is a fixed chill block of a die-cast chill vent and (2) is a movable chill block. (3) is a continuous mountain-shaped gas vent passage communicating with a cavity formed in the mold between the fixed chill block (1) and the movable chill block (2). ) Is preferably 0.6 mm to 2 mm, but is not limited to this range. In addition, the cross-sectional shape of the gas vent passage (3) is a mountain shape such as a triangular shape or a quadrangular shape. However, the present inventor disclosed in Japanese Patent Application No. 2006-266498 and Actual Application No. 2006-007236 (Utility Model Registration No. 3127031). As suggested, it is good also as what provided the bending part in the mountain-shaped intermediate part. (4) is a pressure receiving valve arranged on the inlet side of the gas vent passage (3). The pressure receiving valve (4) is arranged in the fixed chill block (1) and can be moved up and down and will be described below in the lower part. An insertion portion for inserting the end portion (62) of the opening / closing lever (6) is formed.
（５）はガス抜き通路（３）の出口側に配置した閉鎖バルブであり、該閉鎖バルブ（５）は固定型チルブロック（１）に配置され、上下動可能であると共に下部には後述する開閉レバー（６）の端部（62）を挿入させる挿入部が形成されている。また前記閉鎖バルブ（５）の上部中央から固定型チルブロック（１）の出口側と連通可能な排出穴が穿設されている。尚、前記閉鎖バルブ（５）によるガス抜き通路（３）を閉鎖及び開放させる構造は上記のものに限定されるものではなく、他の構造でも良い。（６）は受圧バルブ（４）の作動を閉鎖バルブ（５）に伝えるために備えた揺動可能な開閉レバーであり、該開閉レバー（６）は中央部（61）が固定型チルブロック（１）に軸支されて、その中央部（61）が開閉レバー（６）の支点と成している。また前記開閉レバー（６）の中央部（61）の下部及び両端部（62）の接触面は曲面状に形成されている。（７）は開閉レバー（６）の中央部（61）と閉鎖バルブ（５）との間に備えたコイルバネを用いた開放手段であり、該開放手段（７）は開閉レバー（６）が閉鎖バルブ（５）の開方向に押圧され、溶湯圧が加わらない時に閉鎖バルブ（５）を開く役目を果すためのものである。尚、前記開放手段（７）はコイルバネに限定されるものではなく、エアーシリンダーなどを用いても良い。 (5) is a closing valve disposed on the outlet side of the gas vent passage (3). The closing valve (5) is disposed in the fixed chill block (1) and can be moved up and down and will be described below in the lower part. An insertion portion for inserting the end portion (62) of the opening / closing lever (6) is formed. In addition, a discharge hole that can communicate with the outlet side of the fixed chill block (1) is formed from the upper center of the closing valve (5). The structure for closing and opening the gas vent passage (3) by the closing valve (5) is not limited to the above structure, and other structures may be used. (6) is a swingable opening / closing lever provided to transmit the operation of the pressure receiving valve (4) to the closing valve (5). The opening / closing lever (6) has a central portion (61) with a fixed chill block ( It is pivotally supported by 1), and its central part (61) forms the fulcrum of the open / close lever (6). Further, the contact surface of the lower part of the central part (61) and both end parts (62) of the opening / closing lever (6) is formed in a curved surface shape. (7) is an opening means using a coil spring provided between the central part (61) of the opening / closing lever (6) and the closing valve (5). The opening means (7) is closed by the opening / closing lever (6). When the valve (5) is pressed in the opening direction and no molten metal pressure is applied, it serves to open the closing valve (5). The opening means (7) is not limited to a coil spring, and an air cylinder or the like may be used.
次に本発明の作用を図２に基づいて説明する。先ず始めに鋳造を開始すると、溶湯は図示しないキャビティに入り、ガスが発生し排気側へ排出されると共にキャビティに溶湯が充填される。その後、溶湯はチルブロックの入口側から入って来る。入って来た溶湯は図２（ａ）に示す矢印のように先ずガス抜き通路（３）に入ると共に受圧バルブ（４）の上面には溶湯圧が加わる。すると受圧バルブ（４）は図中の矢印のように下方へ押す力が働くと共に開閉レバー（６）を介して閉鎖バルブ（５）には図中の矢印のように上方へ押上げる力が作用するのである。この時、金型が冷えていてそれが暖まる間の試運転時は、通常運転時より溶湯が低速でキャビティに充填され、ガス抜き通路（３）に達する溶湯圧も低くなっているが、本発明に於いては、開閉レバー（６）の支点が中央部（61）にあると共に開閉レバー（６）の中央部（61）下面及び両端部（62）の接触面を曲面状に形成させて接触抵抗が減少されるものとすることにより、開閉レバー（６）の作動性が極めて滑らかで良好なものとなる。従って、鋳造の試運転時であっても本発明品は、受圧バルブ（４）に加わった溶湯圧が開閉レバー（６）を介して閉鎖バルブ（５）へ確実に伝わって作動するものとなる。つまり、溶湯圧が開放手段（７）のコイルバネによる作用力よりも大きくなった時点で、受圧バルブ（４）は降下し、開閉レバー（６）を介して閉鎖バルブ（５）が押上げられる。すると、チルブロックの入口側から入って来た溶湯は、図２（ｂ）のように作動した閉鎖バルブ（５）によって、溶湯が出口側へ到達する前にガス抜き通路（３）は閉鎖され、チルブロックの出口側から溶湯が流出することがなくなるものとなる。 Next, the operation of the present invention will be described with reference to FIG. First, when casting is started, the molten metal enters a cavity (not shown), gas is generated and discharged to the exhaust side, and the molten metal is filled into the cavity. After that, the molten metal enters from the entrance side of the chill block. The incoming molten metal first enters the gas vent passage (3) as indicated by the arrow shown in FIG. 2 (a), and a molten metal pressure is applied to the upper surface of the pressure receiving valve (4). Then, the pressure-receiving valve (4) pushes downward as indicated by the arrow in the figure, and the closing valve (5) via the opening / closing lever (6) receives the force pushed upward as indicated by the arrow in the figure. To do. At this time, during the trial operation while the mold is cooled and warmed up, the molten metal is filled into the cavity at a lower speed than in the normal operation, and the molten metal pressure reaching the gas vent passage (3) is lower. In this case, the fulcrum of the opening / closing lever (6) is located at the central portion (61) and the contact surface of the lower surface and both end portions (62) of the central portion (61) of the opening / closing lever (6) is formed in a curved surface. By reducing the resistance, the operability of the opening / closing lever (6) is extremely smooth and good. Therefore, even in the trial run of casting, the product of the present invention operates by reliably transmitting the molten metal pressure applied to the pressure receiving valve (4) to the closing valve (5) via the opening / closing lever (6). That is, when the molten metal pressure becomes larger than the acting force by the coil spring of the opening means (7), the pressure receiving valve (4) is lowered and the closing valve (5) is pushed up via the opening / closing lever (6). Then, the molten metal that has entered from the inlet side of the chill block is closed by the closing valve (5) operated as shown in FIG. 2 (b) before the molten metal reaches the outlet side. The molten metal will not flow out from the outlet side of the chill block.
溶湯が凝固後、金型を開くと共にチルブロックも開き、製品を取出す。そして金型を閉じると共にチルブロックも閉じ、上記同様に溶湯を注入させてキャビティが充填され、鋳造作業を繰返せば良い。尚、試運転時に於いて、ガス抜き通路（３）の隙間が１．２ｍｍのものを、３０個前後チルベント部を成形してみたところ、出口側に溶湯が流出したものはなく、且つ、チルベント部が山形状の溝に貼り付いて取りにくいものや折れたものもなかった。従って、スムーズに製品の取出しが行えるものとなり、従来の如きダイキャストの生産を一時停止させることがなくなり、生産性の向上が可能となり、ダイキャスト製品のコストダウンが可能となる。尚、前記ガス抜き通路（３）の隙間が２ｍｍのもので溶湯の流出状態を確認したが、流出するものはなかった。 After the molten metal solidifies, the mold is opened and the chill block is also opened, and the product is taken out. Then, the mold is closed and the chill block is closed, and the molten metal is poured in the same manner as above to fill the cavity, and the casting operation is repeated. At the time of trial operation, when 30 chill vent portions were molded with a clearance of 1.2 mm in the gas vent passage (3), no molten metal flowed out to the outlet side, and the chill vent portion However, there was nothing that was stuck on the mountain-shaped groove and was not easily broken. Therefore, the product can be smoothly taken out, and the production of the die cast as in the prior art is not temporarily stopped, the productivity can be improved, and the cost of the die cast product can be reduced. In addition, although the clearance gap of the said degassing channel | path (3) was 2 mm, the outflow state of the molten metal was confirmed, but there was no outflow.
このように本発明はチルベントにガス抜き機能を設けたことにより、ガス抜き通路（３）の隙間を１．２ｍｍにさせても出口側に溶湯が流出する心配はなくなる。また開閉レバー（６）の中央部（61）を支点とすることにより、受圧バルブ（４）に加わる溶湯圧と略同一の大きさの圧力が閉鎖バルブ（５）へ確実に伝わり、ガス抜き通路（３）の閉鎖が試運転時であっても作動するものとなる。この結果、チルベントのガス抜き通路（３）の隙間が０．６ｍｍのものと比べると、本発明品は山形状の断面積が大きくなり、排気効果が８倍前後になって大量のガスを排気できるものとなるため、チルベント部がスムーズに取出せるものとなると共に従来発生していたダイキャストの生産を一時停止させる必要がなくなった。従って、ダイキャストの生産性が良好になる。しかも粉塵などが真空ポンプの中に吸引される前に、閉鎖バルブ（５）でガス抜き通路（３）の出口側が閉鎖されるため、真空ポンプに粉塵などが入る心配もなくなる。尚、従来の開閉レバー（６）は、支点が図３に示すように端部に設けられているため、閉鎖バルブ（５）に作用する力が受圧バルブ（４）に加わる溶湯圧の半分以下の大きさになってしまうのに対して、本発明品は閉鎖バルブ（５）に作用する力が受圧バルブ（４）に加わる溶湯圧と略同じである。 As described above, the present invention provides the gas venting function to the chill vent, so that there is no fear that the molten metal flows out to the outlet side even if the gap of the gas vent passage (3) is 1.2 mm. Further, by using the central portion (61) of the opening / closing lever (6) as a fulcrum, a pressure substantially equal to the molten metal pressure applied to the pressure receiving valve (4) is reliably transmitted to the closing valve (5), and the gas vent passage Even if the closing of (3) is in the trial run, it will operate. As a result, compared with the chill vent degassing passage (3) with a clearance of 0.6 mm, the product of the present invention has a larger mountain-shaped cross-sectional area, and the exhaust effect is about eight times larger, thereby exhausting a large amount of gas. As a result, the chill vent portion can be taken out smoothly, and it is no longer necessary to temporarily stop the production of die casting that has conventionally occurred. Therefore, the die casting productivity is improved. Moreover, since the outlet side of the gas vent passage (3) is closed by the closing valve (5) before dust or the like is sucked into the vacuum pump, there is no fear that dust or the like enters the vacuum pump. The conventional opening / closing lever (6) has a fulcrum provided at its end as shown in FIG. 3, so that the force acting on the closing valve (5) is less than half of the molten metal pressure applied to the pressure receiving valve (4). However, the product of the present invention is substantially the same as the molten metal pressure applied to the pressure receiving valve (4) by the force acting on the closing valve (5).
１ 固定型チルブロック
２ 可動型チルブロック
３ ガス抜き通路
４ 受圧バルブ
５ 閉鎖バルブ
６ 開閉レバー
61 中央部
62 端部
７ 開放手段
DESCRIPTION OF SYMBOLS 1 Fixed chill block 2 Movable chill block 3 Gas vent passage 4 Pressure receiving valve 5 Closing valve 6 Opening / closing lever
61 Central
62 End 7 Opening means
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| JP2009014930A JP2010172898A (en) | 2009-01-27 | 2009-01-27 | Venting device of chill vent for die casting |
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| JP2009014930A JP2010172898A (en) | 2009-01-27 | 2009-01-27 | Venting device of chill vent for die casting |
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| JP2010172898A true JP2010172898A (en) | 2010-08-12 |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102125993A (en) * | 2010-11-08 | 2011-07-20 | 吴江市森泰机械制造有限公司 | Automatic drawing casting die |
| CN102794430A (en) * | 2011-08-29 | 2012-11-28 | 日本模具贸易株式会社 | Exhaust device used for casting die |
| CN102794431A (en) * | 2012-02-14 | 2012-11-28 | 日本模具贸易株式会社 | Cooling air outlet of die-casting mould |
| CN104827010A (en) * | 2015-05-26 | 2015-08-12 | 重庆东科模具制造有限公司 | Vacuum extraction valve used on die-casting die |
| JP5881028B1 (en) * | 2015-07-24 | 2016-03-09 | 株式会社システムリソーセズ | Gas vent valve |
| KR101824500B1 (en) | 2016-07-14 | 2018-02-01 | 이상길 | Chill Vent for Die Casting |
| KR101933862B1 (en) | 2016-05-26 | 2018-12-31 | 아주대학교산학협력단 | Injection molding apparatus |
| CN110605376A (en) * | 2018-06-15 | 2019-12-24 | 天津源特机械部件有限公司 | Die-casting die for testing hot cracking tendency and mechanical property of rod-shaped casting |
| CN111906272A (en) * | 2020-07-01 | 2020-11-10 | 江苏瑞振压铸有限公司 | Automobile hydraulic pump die-casting equipment convenient to change pressure head |
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2009
- 2009-01-27 JP JP2009014930A patent/JP2010172898A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102125993A (en) * | 2010-11-08 | 2011-07-20 | 吴江市森泰机械制造有限公司 | Automatic drawing casting die |
| CN102794430A (en) * | 2011-08-29 | 2012-11-28 | 日本模具贸易株式会社 | Exhaust device used for casting die |
| CN102794430B (en) * | 2011-08-29 | 2015-11-18 | 日本模具贸易株式会社 | A kind of compression mod exhaust apparatus |
| CN102794431A (en) * | 2012-02-14 | 2012-11-28 | 日本模具贸易株式会社 | Cooling air outlet of die-casting mould |
| CN102794431B (en) * | 2012-02-14 | 2017-03-01 | 日本模具贸易株式会社 | The chill vent of compression mod |
| CN104827010A (en) * | 2015-05-26 | 2015-08-12 | 重庆东科模具制造有限公司 | Vacuum extraction valve used on die-casting die |
| JP5881028B1 (en) * | 2015-07-24 | 2016-03-09 | 株式会社システムリソーセズ | Gas vent valve |
| KR101933862B1 (en) | 2016-05-26 | 2018-12-31 | 아주대학교산학협력단 | Injection molding apparatus |
| KR101824500B1 (en) | 2016-07-14 | 2018-02-01 | 이상길 | Chill Vent for Die Casting |
| CN110605376A (en) * | 2018-06-15 | 2019-12-24 | 天津源特机械部件有限公司 | Die-casting die for testing hot cracking tendency and mechanical property of rod-shaped casting |
| CN111906272A (en) * | 2020-07-01 | 2020-11-10 | 江苏瑞振压铸有限公司 | Automobile hydraulic pump die-casting equipment convenient to change pressure head |
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