JP2016068101A - Malfunction prevention method for opening/closing valve in degassing device for die casting - Google Patents
Malfunction prevention method for opening/closing valve in degassing device for die casting Download PDFInfo
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- 238000007872 degassing Methods 0.000 title claims abstract description 37
- 230000007257 malfunction Effects 0.000 title claims abstract description 15
- 238000004512 die casting Methods 0.000 title claims abstract description 14
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000002265 prevention Effects 0.000 title abstract 3
- 229910052751 metal Inorganic materials 0.000 claims abstract description 60
- 239000002184 metal Substances 0.000 claims abstract description 60
- 238000013022 venting Methods 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 5
- 239000000428 dust Substances 0.000 abstract description 24
- 238000000151 deposition Methods 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000005266 casting Methods 0.000 description 10
- 229910052782 aluminium Inorganic materials 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 238000010586 diagram Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 206010027146 Melanoderma Diseases 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
本発明は溶湯がキャビティに入った際に発生するガスが、空気と一緒に真空吸引装置によって吸引され、且つ、そのガス抜き経路を経て外部へ排出するダイキャスト用ガス抜き装置に於ける開閉バルブの作動不良防止方法に関する。 The present invention relates to an open / close valve in a degassing device for die casting in which gas generated when molten metal enters a cavity is sucked together with air by a vacuum suction device and discharged to the outside through the degassing path. This relates to a method for preventing malfunction of
一般のダイキャスト用ガス抜き装置としては、図１に示すように、固定ブロック（１）と可動ブロック（２）の間にキャビティに連通するガス抜き経路（３）を備え、固定ブロック（１）に、ガス抜き経路（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）と、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、閉鎖バルブ（５）の開方向に押圧する開放手段（７）と、金型が冷えている初期運転時に開閉レバー（６）を強制的に閉鎖バルブ（５）の閉方向に押圧する閉鎖手段（８）とを備え、型開き時にガス抜き経路（３）内で凝固したアルミニウムなどの余剰材料を外部に押し出すための図示しない押出ピンなどが備えられたものである。 As shown in FIG. 1, a general die-casting degassing apparatus includes a degassing path (3) communicating with a cavity between a fixed block (1) and a movable block (2), and the fixed block (1). In addition, a pressure receiving valve (4) disposed on the inlet side of the gas vent path (3), a closing valve (5) disposed on the outlet side, and an opening / closing lever for transmitting the operation of the pressure receiving valve (4) to the closing valve (5). (6), the opening means (7) for pressing in the opening direction of the closing valve (5), and the opening / closing lever (6) forcibly closing the closing valve (5) during the initial operation when the mold is cooled And a closing means (8) for pressing to the outside, and an extrusion pin (not shown) for extruding surplus material such as aluminum solidified in the gas vent path (3) when the mold is opened.
又、従来のガス抜き経路（３）としては、図７に示すように、受圧バルブ（４）から閉鎖バルブ（５）に接続するメイン経路（31）と、キャビティに連通する接続経路（34）とから成されている。このため、鋳造を開始すると、溶湯は図示しないキャビティに入り、ガスが発生する。キャビティの中にあるガスと空気は、真空吸引装置によって吸引されると共にガス抜き経路（３）を経て外部へ排出され、キャビティに溶湯が充填されるのである。その後、溶湯はキャビティと連通するガス抜き装置の入口側からガス抜き経路（３）に入ると、受圧バルブ（４）の上面に溶湯圧が加わる。すると、受圧バルブ（４）は下方へ押す力が働き、開閉レバー（６）を介して閉鎖バルブ（５）が閉鎖される。閉鎖される前にガスは排気されるが、ガス以外のアルミニウムなどは排気されずに閉鎖バルブ（５）の前で止められる機構を有したものである。 As shown in FIG. 7, the conventional gas venting path (3) includes a main path (31) connected from the pressure receiving valve (4) to the closing valve (5), and a connection path (34) communicating with the cavity. It is made up of. For this reason, when casting starts, the molten metal enters a cavity (not shown) and gas is generated. The gas and air in the cavity are sucked by the vacuum suction device and discharged to the outside through the gas vent path (3), and the cavity is filled with the molten metal. Thereafter, when the molten metal enters the degassing path (3) from the inlet side of the degassing device communicating with the cavity, the molten metal pressure is applied to the upper surface of the pressure receiving valve (4). Then, the pressure receiving valve (4) pushes downward, and the closing valve (5) is closed via the opening / closing lever (6). Although the gas is exhausted before closing, aluminum other than the gas is not exhausted but has a mechanism that stops before the closing valve (5).
この時、キャビティと連通するガス抜き装置の入口側から入って来る溶湯の圧を受ける受圧バルブ（４）と、開閉レバー（６）を介して閉鎖する閉鎖バルブ（５）は、両バルブ（４），（５）の両摺動部分の隙間にアルミニウムや細かいダストが入って汚れ易く、両摺動部分の隙間に細かいダストが入ると、両バルブ（４），（５）の動きが悪くなると共に受圧バルブ（４）の動きが遅くなり、閉鎖バルブ（５）の閉鎖機能が低下する結果になり易かった。しかも閉鎖バルブ（５）が閉鎖する前に、溶湯の先走り現象により、溶湯が閉鎖バルブ（５）の中に入ってしまうと、故障を生じて鋳造作業が中断されていた。又、溶湯がキャビティを通り、連通するガス抜き装置まで来る間に溶湯が低温になり、低温になった溶湯は金属に抱き付き易い性質があるため、受圧バルブ（４）と閉鎖バルブ（５）の両摺動部分は抱き付きが生じ易いものであり、抱き付いた部分が両摺動部分の隙間に入り込むと、故障が生じるため、その度に鋳造作業を中断して、入り込んだアルミニウムなどを除去しなければならなかった。更に閉鎖バルブ（５）の摺動部分から細かいダストなどが図示しない真空吸引装置の中に入ると、その真空吸引装置自体の故障の原因になると共にそのフィルターが詰まるので、鋳造作業を一時中断しなければならなかった。 At this time, the pressure receiving valve (4) for receiving the pressure of the molten metal coming from the inlet side of the gas venting device communicating with the cavity and the closing valve (5) for closing via the opening / closing lever (6) are both valves (4 ), (5) Aluminum and fine dust enter the gap between both sliding parts and easily get dirty. If fine dust gets into the gap between both sliding parts, both valves (4), (5) move poorly. At the same time, the movement of the pressure receiving valve (4) is slow, and the closing function of the closing valve (5) tends to be lowered. Moreover, before the closing valve (5) is closed, if the molten metal enters the closing valve (5) due to a preceding phenomenon of the molten metal, a failure occurs and the casting operation is interrupted. In addition, since the molten metal passes through the cavity and reaches the degassing device that communicates with the molten metal, the temperature of the molten metal becomes low, and the molten metal tends to cling to the metal. Therefore, the pressure receiving valve (4) and the closing valve (5) Both sliding parts are easy to be hugged, and if the hugged part enters the gap between both sliding parts, failure will occur, so the casting operation will be interrupted each time, and the aluminum etc. Had to be removed. Furthermore, if fine dust enters the vacuum suction device (not shown) from the sliding part of the closing valve (5), the vacuum suction device itself may be damaged and the filter may be clogged. I had to.
このため、鋳造を開始するに当り、毎回必ずガス抜き装置を分解し、その後、両バルブ（４），（５）の外周面と固定ブロック（１）側の穴部分を洗浄しなければならないので、手間が掛っていた。更に両バルブ（４），（５）の寿命が短くなり、両バルブ（４），（５）と固定ブロック（１）側などを定期的に交換する必要があり、ダイキャスト品の生産性が低く、且つ、維持管理費が掛かり、コストアップになっているのが現状である。 For this reason, when starting casting, the degassing device must be disassembled every time, and then the outer peripheral surface of both valves (4) and (5) and the hole on the fixed block (1) side must be cleaned. It took time and effort. Furthermore, the life of both valves (4) and (5) is shortened, and it is necessary to replace both valves (4) and (5) and the fixed block (1) side regularly. The current situation is that the cost is low and maintenance costs are incurred.
特に、閉鎖バルブ（５）の摺動部分に細かいダストなどが入って付着すると、受圧バルブ（４）が作動しても閉鎖バルブ（５）は完全に閉鎖状態にならなくなり、真空吸引装置のフィルターの詰まりや真空吸引装置自体の故障が起き易くなる等の問題点があった。 In particular, if fine dust or the like enters and adheres to the sliding part of the closing valve (5), the closing valve (5) will not be completely closed even if the pressure receiving valve (4) is operated, and the filter of the vacuum suction device There are problems such as clogging of the vacuum and failure of the vacuum suction device itself.
本発明は閉鎖バルブの摺動部分に細かいダストなどの付着を防止して、ガス抜き装置の作動が長期間に渡ってスムーズに行えると共に生産性を向上し、コスト削減が可能となるダイキャスト用ガス抜き装置に於ける開閉バルブの作動不良防止方法を提供することを目的とする。 The present invention prevents die dust from adhering to the sliding portion of the closing valve, and can smoothly operate the degassing device over a long period of time, improve productivity, and reduce costs. It is an object of the present invention to provide a method for preventing malfunction of an on-off valve in a gas venting device.
本発明は上記問題点を解消するために成されたものであり、つまり、真空吸引装置に於けるダイキャスト用ガス抜き装置のガス抜き経路に、閉鎖バルブ側にバイパス経路を少なくとも設け、該バイパス経路を通過する温度が低く細かいダストを含んだ溶湯が、メイン経路を通過する温度が高く良質な溶湯よりも、遅く閉鎖バルブに到達させて開閉バルブの作動不良を防止する方法と成す。又、メイン経路に折曲部を設けると良く、且つ、バイパス経路を、可動ブロックと固定ブロックに渡って設けるものとするのが好ましい。またバイパス経路を閉鎖経路としても良い。尚、本発明で言う「閉鎖経路」とは、溶湯が固化して湯溜りとなる経路を指すものとする。 The present invention has been made to solve the above-described problems. That is, at least a bypass path is provided on the closing valve side in the degassing path of the die-casting degassing apparatus in the vacuum suction apparatus, and the bypass The molten metal containing fine dust that has a low temperature passing through the path reaches the closing valve later than the high-quality molten metal that passes through the main path and has a high quality, thereby preventing malfunction of the on-off valve. Further, it is preferable to provide a bent portion in the main path, and it is preferable to provide a bypass path across the movable block and the fixed block. The bypass route may be a closed route. In addition, the “closed path” referred to in the present invention refers to a path in which the molten metal is solidified and becomes a hot water pool.
請求項１のようにガス抜き経路（３）が、受圧バルブ（４）から閉鎖バルブ（５）に接続するメイン経路（31）と、閉鎖バルブ（５）側に設けたバイパス経路（32）とから少なくとも成され、該バイパス経路（32）を通過する温度が低く細かいダストを含んだ溶湯は、メイン経路（31）を通過する温度が高く良質な溶湯よりも、閉鎖バルブ（５）に到達する時間が長くなることにより、鋳造時に、アルミニウムなどの細かいダストは、受圧バルブ（４）と閉鎖バルブ（５）のそれぞれの摺動部分に入ることを防止し、特に閉鎖バルブ（５）の摺動部分に細かいダストが入ることを防止出来るものとなるため、閉鎖バルブ（５）が完全に密着閉鎖可能となり、受圧バルブ（４）と閉鎖バルブ（５）の作動不良が殆んど生じないものとなると共に、従来に発生していた鋳造作業の一時停止，鋳造作業の開始前に行われていたガス抜き装置の分解及び洗浄，各部品の定期的な点検及び部品交換，摺動部分の隙間に入ったアルミニウムや細かいダストの除去等が不要となると共に高価な真空吸引装置の故障やフィルターの詰まりが殆んどなくなる。 The degassing path (3) as in claim 1 includes a main path (31) connected from the pressure receiving valve (4) to the closing valve (5), and a bypass path (32) provided on the closing valve (5) side. The molten metal containing at least a low temperature passing through the bypass path (32) and containing fine dust reaches the closing valve (5) than the high-quality molten metal passing through the main path (31). The longer time prevents fine dust such as aluminum from entering the respective sliding parts of the pressure-receiving valve (4) and the closing valve (5) during casting, especially the sliding of the closing valve (5). Since it is possible to prevent fine dust from entering the part, the closing valve (5) can be closed tightly and the malfunction of the pressure receiving valve (4) and the closing valve (5) hardly occurs. As Temporarily stopping casting operations that had occurred in the past, disassembling and cleaning the degassing equipment that was performed before the start of casting operations, periodic inspection and replacement of each part, aluminum in the gap of the sliding part In addition, it is unnecessary to remove fine dust and the like, and there is almost no failure of an expensive vacuum suction device or clogging of a filter.
請求項２のようにメイン経路（31）に折曲部（33）を設けて、メイン経路（31）を通過する溶湯の圧力（運動エネルギー）が減少されることにより、溶湯が閉鎖バルブ（５）まで到達する時間が長くなるため、閉鎖バルブ（５）の閉鎖が略完璧になるので、ダイキャスト用ガス抜き装置の作動が長期間に渡ってスムーズに行えると共にダイキャスト品の生産性を向上させ、コスト削減が可能となる。更に受圧バルブ（４）と閉鎖バルブ（５）の寿命がより長いものとなる。 The bent portion (33) is provided in the main path (31) as in claim 2, and the pressure of the molten metal (kinetic energy) passing through the main path (31) is reduced, so that the molten metal is closed by the valve (5). The closing time of the closing valve (5) is almost perfect, so that the operation of the degassing device for die casting can be performed smoothly over a long period of time and the productivity of die casting products is improved. Cost reduction. Furthermore, the lifetimes of the pressure receiving valve (4) and the closing valve (5) become longer.
請求項３に示すようにバイパス経路（32）が、固定ブロック（１）と可動ブロック（２）に渡って設けられることにより、バイパス経路（32）の長さが長くなるため、バイパス経路（32）を通過する温度が低く細かいダストを含んだ溶湯は、メイン経路（31）を通過する温度が高く良質な溶湯よりも、閉鎖バルブ（５）に到達する時間が確実に長くなり、鋳造時に、アルミニウムなどの細かいダストが、閉鎖バルブ（５）に入ることがなくなる。従って、受圧バルブ（４）と閉鎖バルブ（５）の開閉バルブの作動不良の防止が可能となるのである。 Since the bypass path (32) is provided across the fixed block (1) and the movable block (2) as shown in claim 3, the length of the bypass path (32) is increased, so that the bypass path (32 ) The molten metal containing fine dust with a low temperature passing through the main passage (31) has a longer time to reach the closing valve (5) than the high-quality molten metal passing through the main path (31). Fine dust such as aluminum will not enter the closing valve (5). Therefore, it is possible to prevent malfunction of the opening / closing valves of the pressure receiving valve (4) and the closing valve (5).
請求項４に示すようにバイパス経路（32）を閉鎖経路と成すことにより、バイパス経路（32）を通過する温度が低く細かいダストを含んだ溶湯は、閉鎖バルブ（５）に到達することなく湯溜りとなって固化するので、鋳造時に、アルミニウムなどの細かいダストが、閉鎖バルブ（５）の隙間に入ることがなくなり、受圧バルブ（４）と閉鎖バルブ（５）の開閉バルブの作動不良の防止が略完全となるのである。 By forming the bypass path (32) as a closed path as shown in claim 4, the molten metal containing low dust and fine dust passing through the bypass path (32) does not reach the closing valve (5). Since it accumulates and solidifies, fine dust such as aluminum does not enter the gap between the closing valve (5) during casting, and prevents the opening and closing valves of the pressure receiving valve (4) and the closing valve (5) from malfunctioning. Is almost perfect.
図１は本発明方法で用いるガス抜き装置の一例を示す断面図であり、この図の番号について説明する。（１）はダイキャスト用の固定ブロックであり、（２）は可動ブロックである。 FIG. 1 is a cross-sectional view showing an example of a degassing apparatus used in the method of the present invention, and the numbers in this figure will be described. (1) is a fixed block for die casting, and (2) is a movable block.
（３）は固定ブロック（１）と可動ブロック（２）の間に形成され、且つ、キャビティに連通するガス抜き経路であり、該ガス抜き経路（３）は図２に示すように、後述する受圧バルブ（４）の上面側から後述する閉鎖バルブ（５）の上面側に接続するメイン経路（31）と、前記閉鎖バルブ（５）側に設けたバイパス経路（32）と、キャビティに連通する接続経路（34）とがある。前記バイパス経路（32）は、溶湯がメイン経路（31）を通過して閉鎖バルブ（５）に到達するよりも遅くなるようにしたものであり、バイパス経路（32）の長さや幅が適宜に調節されている。このバイパス経路（32）の長さはメイン経路（31）のものよりも長くし、且つ、その形状としては、図５に示すように上下方向で折曲させて距離（長さ）を伸ばしている。この時のバイパス経路（32）は、白抜き部分が可動ブロック（２）側に形成され、黒点部分が固定ブロック（１）側に形成されている。 (3) is a degassing path formed between the fixed block (1) and the movable block (2) and communicating with the cavity. The degassing path (3) will be described later as shown in FIG. A main path (31) connected from the upper surface side of the pressure receiving valve (4) to the upper surface side of a closing valve (5) described later, a bypass path (32) provided on the closing valve (5) side, and communicated with the cavity There is a connection path (34). The bypass path (32) is configured such that the molten metal passes through the main path (31) and reaches the closing valve (5) so that the length and width of the bypass path (32) are appropriately set. It has been adjusted. The length of the bypass path (32) is longer than that of the main path (31), and the shape of the bypass path (32) is bent in the vertical direction to increase the distance (length) as shown in FIG. Yes. The bypass path (32) at this time has a white portion formed on the movable block (2) side and a black spot portion formed on the fixed block (1) side.
（４）はガス抜き経路（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）は固定ブロック（１）に配置され、上下動可能である。（５）はガス抜き経路（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）は固定ブロック（１）に配置され、上下動可能である。また前記閉鎖バルブ（５）の上部中央から固定ブロック（１）の出口側と連通可能な排出経路を設けておくと良い。尚、前記閉鎖バルブ（５）によるガス抜き経路（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。又、前記受圧バルブ（４）及び閉鎖バルブ（５）の各外周面の一部を切削して空気溜りが、図１に示すように形成されたものとしても良い。 (4) is a pressure receiving valve arranged on the inlet side of the gas venting path (3). The pressure receiving valve (4) is arranged in the fixed block (1) and can be moved up and down. (5) is a closing valve arranged on the outlet side of the gas venting path (3). The closing valve (5) is arranged in the fixed block (1) and can move up and down. It is also preferable to provide a discharge path that can communicate with the outlet side of the fixed block (1) from the upper center of the closing valve (5). Note that the structure for closing and opening the gas vent path (3) by the closing valve (5) is not limited to the above structure, and other structures may be used. Moreover, a part of each outer peripheral surface of the said pressure receiving valve (4) and a closing valve (5) may be cut, and the air pocket may be formed as shown in FIG.
（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る。（７）は開閉レバー（６）を持上げるための開放手段であり、該開放手段（７）としてはコイルバネを用いると良い。この開放手段（７）は開閉レバー（６）が閉鎖バルブ（５）の開方向に押圧され、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。（８）は初期運転時に開閉レバー（６）を強制的に閉鎖バルブ（５）の閉方向に押圧する閉鎖手段である。 (6) is a swingable opening / closing lever provided to transmit the operation of the pressure receiving valve (4) to the closing valve (5). (7) is an opening means for lifting the open / close lever (6), and a coil spring may be used as the opening means (7). The opening means (7) serves to open the closing valve (5) when the opening / closing lever (6) is pressed in the opening direction of 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. (8) is a closing means for forcibly pressing the opening / closing lever (6) in the closing direction of the closing valve (5) during the initial operation.
図３は他の実施形態のガス抜き経路を示す図であり、これは前記実施形態と比べ、ガス抜き経路（３）のメイン経路（31）が異なる。つまり、メイン経路（31）の中間部に折曲部（33）が設けられている。この折曲部（33）としては、図中に示すようにクランク状に設けられているが、他の形状としても良い。前記折曲部（33）は従来のものよりも経路を長く確保し、溶湯の圧力、つまり、運動エネルギーを減少させることで、閉鎖バルブ（５）に到着するまでの時間を遅らす役目を果たす。 FIG. 3 is a diagram showing a gas venting path according to another embodiment, which is different from the above embodiment in the main path (31) of the gas venting path (3). That is, the bent part (33) is provided in the middle part of the main path (31). The bent portion (33) is provided in a crank shape as shown in the figure, but may have other shapes. The bent portion (33) secures a longer path than the conventional one and reduces the pressure of the molten metal, that is, the kinetic energy, thereby delaying the time to reach the closing valve (5).
図４は別実施形態のガス抜き経路を示す図であり、これは図３のものと比べ、ガス抜き経路（３）のバイパス経路（32）が異なる。つまり、バイパス経路（32）の中間部が閉鎖バルブ（５）に接続されず、バイパス経路（32）は閉鎖経路と成されている。このバイパス経路（32）の溶湯は湯溜りとなる。 FIG. 4 is a diagram showing a degassing path according to another embodiment, which is different from that of FIG. That is, the middle part of the bypass path (32) is not connected to the closing valve (5), and the bypass path (32) is a closed path. The molten metal in the bypass path (32) becomes a puddle.
次に本発明の開閉バルブの作動不良防止方法について説明する。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、ガスが発生しキャビティ中の空気と一緒に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、溶湯は可動ブロック（２）の入口側から図１の図中に示す矢印のように入って来る。入って来た溶湯は、先ずガス抜き経路（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）は下方へ押す力が働き、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）が押下げられる。この時、可動ブロック（２）の入口側から入って来た溶湯は、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経路（３）は閉鎖され、固定ブロック（１）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。ここまでは従来と同じである。 Next, a method for preventing malfunction of the on-off valve of the present invention will be described. First, when casting is started, the molten metal enters a cavity (not shown), gas is generated and discharged to the exhaust side together with the air in the cavity, and the molten metal is filled into the cavity. Thereafter, the molten metal enters from the entrance side of the movable block (2) as indicated by the arrow shown in FIG. The molten metal that has entered first enters the gas venting path (3) and the molten metal pressure is applied to the upper surface of the pressure receiving valve (4). Then, the pressure receiving valve (4) pushes downward, the pressure receiving valve (4) is lowered, and the closing valve (5) is pushed down via the opening / closing lever (6). At this time, the molten metal that has entered from the inlet side of the movable block (2) is closed by the closing valve (5), before the molten metal reaches the outlet side, the gas vent path (3) is closed, and the fixed block (1). The molten metal will not flow out from the outlet side of the steel. The process up to this point is the same as before.
この時、特にガス抜き経路（３）の溶湯の流れ方について詳細に説明する。先ず始めに溶湯は接続経路（34）に流入し、受圧バルブ（４）の上面で２方向に分かれてメイン経路（31）を通過した後、閉鎖バルブ（５）の上面へ両側から到達し、溶湯は凝固されるが、溶湯の先走りによって生じた温度が低く細かいダストを含んだ先走り溶湯は、閉鎖バルブ（５）の閉じるタイミングが遅れると、排気ガスと一緒に閉鎖バルブ（５）の内部に細かいダストが浸入する恐れを、従来品に於いては生じていた。しかしながら、本発明方法に於いては、この細かいダストが閉鎖バルブ（５）の内部に浸入する前に、高温で良質な溶湯が閉鎖バルブ（５）の上面に到達して完全に密着閉鎖させて、細かいダストの浸入を確実に防止するものとなるのである。つまり、図６に示す矢印のように、閉鎖バルブ（５）に向う先頭の温度が低く細かいダストを含んだ先走り溶湯は、点線矢印のようにメイン経路（31）を曲がらずに、実線矢印のように直進してバイパス経路（32）へ流れ込み、図５、図６（ｂ）に示すように可動ブロック（２）側と固定ブロック（１）側との間を交互に通過してから閉鎖バルブ（５）に到達する。このため、点線矢印のようにメイン経路（31）を曲がった高温で良質な溶湯よりは、バイパス経路（32）を介して閉鎖バルブ（５）に到達した先頭の温度が低く細かいダストを含んだ先走り溶湯の方が、閉鎖バルブ（５）に到達するのが遅れるので、閉鎖バルブ（５）は確実に閉鎖された後に、先頭の溶湯が来るものとなるため、閉鎖バルブ（５）の摺動部分に細かいダストが付着することがなくなり、閉鎖バルブ（５）の作動不良は生じないものとなる。尚、バイパス経路（32）を温度が低く細かいダストを含んだ先走り溶湯が通過することにより、溶湯の先走り自体が低減するものとなる。更に、一週間鋳造し続けても閉鎖バルブ（５）の詰りは殆んど生じなかった。又、図６（ａ）は本発明に於けるバイパス経路（32）を溶湯が流れる状態を示す図であり、図６（ｂ）は（ａ）の側面を示す図である。 At this time, in particular, the flow of the molten metal in the gas vent path (3) will be described in detail. First, the molten metal flows into the connection path (34), splits in two directions on the upper surface of the pressure receiving valve (4), passes through the main path (31), and reaches the upper surface of the closing valve (5) from both sides. Although the molten metal is solidified, the first molten metal containing fine dust with low temperature generated by the first molten metal will be put inside the closing valve (5) together with the exhaust gas when the closing timing of the closing valve (5) is delayed. In the conventional product, there is a fear that fine dust may enter. However, in the method of the present invention, before this fine dust enters the inside of the closing valve (5), a high-quality molten metal reaches the upper surface of the closing valve (5) and closes tightly. This will surely prevent the entry of fine dust. In other words, as shown by the arrows in FIG. 6, the starting molten metal containing the fine dust with the low head temperature toward the closing valve (5) does not bend the main path (31) as shown by the dotted arrows, As shown in FIG. 5 and FIG. 6 (b), the valve travels straight between the movable block (2) side and the fixed block (1) side, and then closes the valve. Reach (5). For this reason, the top temperature reaching the closing valve (5) via the bypass path (32) is lower than the high-quality high-quality molten metal that bends the main path (31) as indicated by the dotted arrow, and contains fine dust. Since the first-run molten metal arrives at the closing valve (5) later, the closing valve (5) is closed after the first molten metal comes after the closing valve (5) is securely closed. Fine dust does not adhere to the portion, and the malfunction of the closing valve (5) does not occur. In addition, the first run of the molten metal itself is reduced by passing the first run of molten metal containing fine dust having a low temperature through the bypass path (32). Furthermore, the clogging of the closing valve (5) hardly occurred even if the casting was continued for one week. FIG. 6 (a) is a view showing a state where the molten metal flows through the bypass path (32) in the present invention, and FIG. 6 (b) is a view showing a side surface of (a).
又、メイン経路（31）に図３に示すような折曲部（33）を設けることにより、溶湯は折曲部（33）を曲がる度に、溶湯の圧力（運動エネルギー）が減少されると共に速度も遅くなり、且つ、溶湯が、従来の直線的な流れに対して、ジグザグに折曲され、メイン経路（31）を通過する時間が従来のものよりも長くなる。このため、溶湯面積が多くなって溶湯の量も増加され、可動ブロック（２）側の温度が上昇して高温の溶湯が維持でき、溶湯が開閉バルブ（４）,（５）への抱き付きが低下するものとなる。この時の溶湯温度は、従来よりも約１００℃前後高く維持できることが本発明者によって確認されている。 Further, by providing a bent portion (33) as shown in FIG. 3 in the main path (31), the molten metal is reduced in pressure (kinetic energy) each time the bent portion (33) is bent. The speed is also reduced, and the molten metal is zigzag with respect to the conventional linear flow, and the time for passing through the main path (31) is longer than that of the conventional one. For this reason, the molten metal area is increased and the amount of the molten metal is increased, the temperature on the movable block (2) side rises to maintain a high temperature molten metal, and the molten metal is attached to the opening / closing valves (4) and (5). Decreases. It has been confirmed by the present inventors that the molten metal temperature at this time can be maintained at about 100 ° C. higher than before.
１ 固定ブロック
２ 可動ブロック
３ ガス抜き経路
31 メイン経路
32 バイパス経路
33 折曲部
４ 受圧バルブ
５ 閉鎖バルブ
６ 開閉レバー
７ 開放手段
８ 閉鎖手段
1 fixed block 2 movable block 3 degassing path
31 Main route
32 Bypass path
33 Bent part 4 Pressure receiving valve 5 Closing valve 6 Opening / closing lever 7 Opening means 8 Closing means
Claims (4)
The method for preventing malfunction of the on-off valve in the degassing apparatus for die casting according to claim 1 or 3, wherein the bypass path (32) is formed as a closed path without being connected to the closing valve (5).
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| KR1020150092371A KR101723656B1 (en) | 2014-09-29 | 2015-06-29 | malfunction prevention method of open and close valve in degassing device for die casting |
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| CN108253181A (en) * | 2018-01-12 | 2018-07-06 | 江苏远洋阀门智控股份有限公司 | A kind of vaccum stop valve |
| CN108480596A (en) * | 2018-05-22 | 2018-09-04 | 宁波北仑益鸣企业管理服务有限公司 | A kind of vacuum valve air extractor for die casting |
| CN109093091A (en) * | 2018-05-14 | 2018-12-28 | 日本模具贸易株式会社 | The trouble-saving device of die casting open and close valve |
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| CN107321956B (en) * | 2016-04-29 | 2019-06-11 | 长城汽车股份有限公司 | Die casting vacuum valve |
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| JPS6117350A (en) * | 1984-06-30 | 1986-01-25 | Fuso Light Alloys Co Ltd | Die of die casting machine |
| JP2000094112A (en) * | 1998-07-21 | 2000-04-04 | Itsuki Morikawa | Gas venting device for die casting |
| JP2001047187A (en) * | 1999-08-04 | 2001-02-20 | Uogishi Seiki Kogyo Kk | Degassing device for die casting |
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| JP4519304B2 (en) * | 2000-11-06 | 2010-08-04 | 株式会社ダイエンジニアリング | Degassing method and die-casting device in mold |
| JP2011183406A (en) | 2010-03-05 | 2011-09-22 | Japan Mold Trade:Kk | Cooler-installed degassing apparatus for die casting |
| 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 |
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|---|---|---|---|---|
| JPS6117350A (en) * | 1984-06-30 | 1986-01-25 | Fuso Light Alloys Co Ltd | Die of die casting machine |
| JP2000094112A (en) * | 1998-07-21 | 2000-04-04 | Itsuki Morikawa | Gas venting device for die casting |
| JP2001047187A (en) * | 1999-08-04 | 2001-02-20 | Uogishi Seiki Kogyo Kk | Degassing device for die casting |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108253181A (en) * | 2018-01-12 | 2018-07-06 | 江苏远洋阀门智控股份有限公司 | A kind of vaccum stop valve |
| CN109093091A (en) * | 2018-05-14 | 2018-12-28 | 日本模具贸易株式会社 | The trouble-saving device of die casting open and close valve |
| CN108480596A (en) * | 2018-05-22 | 2018-09-04 | 宁波北仑益鸣企业管理服务有限公司 | A kind of vacuum valve air extractor for die casting |
| CN108480596B (en) * | 2018-05-22 | 2020-03-31 | 宁波北仑益鸣企业管理服务有限公司 | Vacuum valve air exhaust device for die casting die |
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| JP6408845B2 (en) | 2018-10-17 |
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