JPH11123527A - Filter for stoke - Google Patents

Filter for stoke

Info

Publication number
JPH11123527A
JPH11123527A JP29502797A JP29502797A JPH11123527A JP H11123527 A JPH11123527 A JP H11123527A JP 29502797 A JP29502797 A JP 29502797A JP 29502797 A JP29502797 A JP 29502797A JP H11123527 A JPH11123527 A JP H11123527A
Authority
JP
Japan
Prior art keywords
filter
stoke
stalk
molten metal
end surface
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.)
Pending
Application number
JP29502797A
Other languages
Japanese (ja)
Inventor
Kiyoshi Urakawa
清志 浦川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsui Mining and Smelting Co Ltd
Original Assignee
Mitsui Mining and Smelting Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsui Mining and Smelting Co Ltd filed Critical Mitsui Mining and Smelting Co Ltd
Priority to JP29502797A priority Critical patent/JPH11123527A/en
Publication of JPH11123527A publication Critical patent/JPH11123527A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To enlarge the filtering area, to equalize the pressure loaded to the inside and the outside of a filter and to contrive the suitableness of pressure control at the time of casting by inserting the filter made of porous material covering the periphery of a stoke in a pressure casting apparatus without fixing, and keeping the upper part thereof to the opening state. SOLUTION: This filter 2 for stoke is formed in a bottomed cylindrical shape and has the size of the inner diameter with room at larger than the outer diameter of the stoke. Further, the distance B from the upper end surface of the filter 2 to the surface 11 of molten metal 6 is made to longer than the distance A from the bottom part 10 of a crucible to the lower end surface 12 of the stoke to prevent the flowing of the molten metal 6 from the upper end of the filter 2 into the inner part at the time of sinking down with the dead wt. Then, in the case of floating up the filter caused by sp. gr. difference between the filter 2 and the molten metal 6, the length of the filter 2 is made to longer than the whole length of the stoke in the crucible or the raggedness is arranged on the lower end surface of the stoke to contrive the increase of flowing-in of the molten metal 6 besides the bottom surface of the filter 2.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【産業上の利用分野】本発明は、アルミニウムなどの金
属の圧力鋳造装置に用いられるストークに取り付けるフ
ィルターに関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter attached to a stalk used in a pressure casting apparatus for metal such as aluminum.

【0002】[0002]

【従来技術】自動車のアルミニウムホイールなどの金属
の鋳造製品は年々品質の向上がもとめられ、そのために
アルミニウムなどの溶融金属中の介在物を除去すること
がポイントになっている。この対策として、例えば実開
昭61−182662号、特開平7−284904号に
はストークの底部分を多孔質材料の濾過体で形成したも
のが記載されている。しかし、この方法では、ストーク
の形状に制約されて濾過面積を広くとることができな
い。従って、鋳造に伴い短時間で濾過抵抗が高くなり、
圧力鋳造で最も重要な圧力制御が困難となるので、頻繁
にフィルターを取り替える事態が発生する。フィルター
を取り替える場合は、ストーク本体を取り外し、フィル
ターを取り付けなければならないので、操業に支障をき
たすと共に取り替え作業も構造上非常に繁雑である。
2. Description of the Related Art The quality of cast metal products such as aluminum wheels of automobiles is expected to be improved year by year, and it is important to remove inclusions in molten metal such as aluminum. As a countermeasure, for example, Japanese Utility Model Application Laid-Open No. Sho 61-182662 and Japanese Patent Application Laid-Open No. Hei 7-284904 disclose a method in which a bottom portion of a stalk is formed of a porous filter material. However, in this method, the filtration area cannot be widened due to the shape of the Stoke. Therefore, the filtration resistance increases in a short time with casting,
Since the most important pressure control in pressure casting becomes difficult, frequent filter replacement occurs. When replacing the filter, the Stoke main body must be removed and the filter must be attached, which hinders the operation and the replacement work is structurally very complicated.

【0003】また、実開昭59−102251号、実開
昭60−115666号にもストークの一部分を多孔質
材料の濾過体で形成したものが記載されているが、同様
に、濾過面積を広くとることができない。従って、前記
と同様の問題点がある。
Japanese Utility Model Application Laid-Open No. 59-102251 and Japanese Utility Model Application Laid-open No. 60-115666 also disclose a method in which a part of stalk is formed by a filter made of a porous material. I can't take it. Therefore, there is the same problem as described above.

【0004】[0004]

【発明が解決しようとする課題】本発明は、上記の従来
の問題点を解決したものである。即ち、(1)濾過抵抗
が小さく、(2)圧力鋳造において最も重要な圧力制御
が、フィルターがない場合と同程度に容易となり、さら
に、(3)フィルターの取り替えが必要となった場合
は、簡単に取り替えできるストーク用フィルターを提供
することを目的とする。
SUMMARY OF THE INVENTION The present invention has solved the above-mentioned conventional problems. That is, (1) the filtration resistance is small, (2) the most important pressure control in pressure casting becomes as easy as the case without a filter, and (3) if the filter needs to be replaced, An object of the present invention is to provide a filter for Stoke that can be easily replaced.

【0005】[0005]

【課題を解決するための手段】よって、本発明は、圧力
鋳造装置に用いるストークの周囲に、該ストークをカバ
ーする多孔質材料製のフィルターを、該ストークに固定
せずに、フィルター上部を開放した状態でストークに配
置し、フィルターの内側と外側に同じ圧力がかかるよう
にしたストーク用フィルターである。また、本発明は、
ストーク用フィルターの上端面から金属溶湯の湯面まで
の距離が、ストークの下端面からるつぼの底部までの距
離よりも長くした前記のストーク用フィルターである。
これによって、濾過面積が従来よりも数倍広くとれ、フ
ィルターの寿命を延ばすことができるという利点、フィ
ルターの内側と外側に同じ圧力がかかり、フィルターが
無い場合と同様に圧力制御が容易になるという利点、取
り替えが容易になるという利点等がある。
Accordingly, the present invention provides a filter made of a porous material which covers a stalk used for a pressure casting apparatus without fixing the stalk to the stalk without fixing the filter to the stalk. This is a filter for Stoke which is arranged in a Stoke in a state where the same pressure is applied to the inside and outside of the filter. Also, the present invention
The above-mentioned stalk filter wherein the distance from the upper end surface of the stalk filter to the surface of the molten metal is longer than the distance from the lower end surface of the stalk to the bottom of the crucible.
This has the advantage that the filtration area can be several times wider than before, extending the life of the filter, and applying the same pressure to the inside and outside of the filter, making pressure control as easy as without a filter. There are advantages such as easy replacement.

【0006】[0006]

【発明の実施の形態】図1に、圧力鋳造装置の全体図を
示す。炉体4に収納された、るつぼ1は炉体4に設けた
ヒーターにより、加熱・保温され、該るつぼ1の上面は
蓋13で密閉されている。ストーク3と蓋13とも密封
されている。圧縮空気5をるつぼ1内に送り込むことに
より、るつぼ1内の金属溶湯6はストーク3、湯口15
を通って、金型8に注入され、その後、冷却・固化し
て、製品7が得られる。金型8は固定型18と可動型1
9とからなり、型抜シリンダー9により可動型19を上
に持ち上げ、固化した製品7を金型8から取り出す。ま
た、るつぼ1の金属溶湯6の補給は、給湯口16から行
われるが、この給湯口16は常時密閉されている。図2
は、本発明の実施の形態に係るストーク用フィルターで
ある。2はストーク用フィルターであり、金属溶湯6の
不純物を濾過する作用をする。ストーク用フィルター2
は有底の円筒形状をした多孔質なセラミックからなり、
ストーク3に差し込んだだけで固定することなくセット
される。ストーク用フィルター2の内径はストーク3の
外径に対し余裕をもった大きさにし、ストーク用フィル
ター2のうち金属溶湯6にひたっている部分全体で金属
溶湯6を濾過する。ストーク用フィルター2は、るつぼ
1の深さと金属溶湯6の湯面位置とを考慮した長さにす
る。
FIG. 1 shows an overall view of a pressure casting apparatus. The crucible 1 housed in the furnace body 4 is heated and kept warm by a heater provided in the furnace body 4, and the upper surface of the crucible 1 is closed with a lid 13. Both Stoke 3 and lid 13 are sealed. By sending the compressed air 5 into the crucible 1, the molten metal 6 in the crucible 1 becomes the stalk 3 and the gate 15.
, And is injected into a mold 8 and then cooled and solidified to obtain a product 7. The mold 8 includes a fixed mold 18 and a movable mold 1
The movable mold 19 is lifted up by the mold release cylinder 9 and the solidified product 7 is taken out of the mold 8. The replenishment of the molten metal 6 in the crucible 1 is performed from a hot water supply port 16, which is always closed. FIG.
Is a Stoke filter according to the embodiment of the present invention. Reference numeral 2 denotes a stalk filter, which functions to filter impurities in the molten metal 6. Stoke filter 2
Is made of porous ceramic with a bottomed cylindrical shape,
It is set without fixing just by inserting it into Stoke 3. The inner diameter of the stalk filter 2 is set to have a margin with respect to the outer diameter of the stalk 3, and the entire portion of the stalk filter 2 lying on the molten metal 6 is filtered. The stalk filter 2 has a length that takes into account the depth of the crucible 1 and the surface level of the molten metal 6.

【0007】即ち、ストーク用フィルター2の上端面か
ら金属溶湯6の湯面11までの距離Bを、るつぼ1の底
部10からストーク3の下端面12までの距離Aよりも
長くしておき、ストーク用フィルター2が自重により沈
下しても、金属溶湯6がストーク用フィルター2の上端
面から内に入り込まないようにする。なお、ストーク用
フィルター2はそれ自体の比重と金属溶湯6の比重との
差により浮く場合もあり、沈む場合もある。浮く場合
は、ストーク用フィルター2の底面17にストーク3の
下端面12が当接し、金属溶湯6がストーク用フィルタ
ー2の底面17からのみ流れることにより濾過抵抗が増
すことを防ぐために、ストーク用フィルター2の長さ
を、るつぼ1内にあるストーク3の全長より長くする
か、又は、図4に示すようにストーク3の下端面12に
凹凸を設けておくのがよい。図3に示すようにストーク
用フィルター2の上部に蓋13を設け、該蓋13の略中
央部に設けた孔にストーク3を挿入するようにすると、
ストーク3に対するストーク用フィルター2の位置が安
定する。蓋13を設ける場合は、ストーク用フィルター
2の上端部20に孔14を設けておくのがよい。
That is, the distance B from the upper end surface of the Stoke filter 2 to the surface 11 of the molten metal 6 is made longer than the distance A from the bottom 10 of the crucible 1 to the lower end surface 12 of the Stoke 3, and Even if the filter for sinking 2 sinks by its own weight, the molten metal 6 is prevented from entering from the upper end surface of the filter for stalk 2. The Stoke filter 2 may float or sink depending on the difference between the specific gravity of itself and the specific gravity of the molten metal 6. When floating, the lower end surface 12 of the stalk 3 abuts against the bottom surface 17 of the stalk filter 2, and the stalk filter is used to prevent the metal melt 6 from flowing only from the bottom surface 17 of the stalk filter 2 to increase the filtration resistance. It is preferable that the length of the stalk 3 is longer than the entire length of the stalk 3 in the crucible 1, or that the lower end surface 12 of the stalk 3 is provided with irregularities as shown in FIG. As shown in FIG. 3, when a lid 13 is provided on the upper part of the stalk filter 2 and the stalk 3 is inserted into a hole provided at a substantially central portion of the lid 13,
The position of the stalk filter 2 with respect to the stalk 3 is stabilized. When the cover 13 is provided, it is preferable to provide the hole 14 in the upper end portion 20 of the stalk filter 2.

【0008】[0008]

【作用】本発明の作用を説明する。圧力鋳造するとき、
可動型19を固定型18に密着させ、型抜シリンダー9
で力を加えておく。その後、るつぼ1内に圧縮空気5を
注入し、その圧力により、るつぼ1内の金属溶湯6を、
ストーク用フィルター2を通して不純物を濾過し、スト
ーク3を経由して金型8内に注入する。その後、金型8
に注入した金属溶湯6を圧力を加えたまま冷却・固化さ
せ、所定温度まで冷却したとき金型8から取り出す。金
属溶湯6を金型8に注入するときの圧力および内側に加
わる圧力が、供給される圧縮空気5の圧力Pと同じにな
るため、金属溶湯6を金型8に注入するときの圧力およ
び固化するまでに加えておく圧力の制御は圧縮空気5の
圧力制御をするだけでよく、圧力制御が適格、容易に行
える。従って、圧力鋳造において巣のない良好な製品を
得ることができる。
The operation of the present invention will be described. When pressure casting,
The movable mold 19 is brought into close contact with the fixed mold 18 and
Add power with. Thereafter, the compressed air 5 is injected into the crucible 1, and the pressure causes the molten metal 6 in the crucible 1 to be removed.
The impurities are filtered through the stalk filter 2 and injected into the mold 8 via the stalk 3. Then, mold 8
The molten metal 6 injected into the mold is cooled and solidified while applying pressure, and is taken out of the mold 8 when cooled to a predetermined temperature. Since the pressure when the molten metal 6 is injected into the mold 8 and the pressure applied to the inside thereof are the same as the pressure P of the compressed air 5 to be supplied, the pressure and the solidification when the molten metal 6 is injected into the mold 8 are set. It is sufficient to control the pressure applied before the pressure control of the compressed air 5 only, and the pressure control can be performed appropriately and easily. Therefore, it is possible to obtain a good product without burrs in pressure casting.

【0009】[0009]

【発明の効果】以上説明したように、本発明によれば、
濾過に寄与するストーク用フィルターの面積が大きくな
り、濾過抵抗が小さく、フィルターの寿命が長く、鋳造
圧力の制御が、フィルターがない場合と同程度に容易で
あり、長期間の連続操業が可能となる。さらに、フィル
ターの取り替えが必要となった場合も、簡単に取り替え
できる。
As described above, according to the present invention,
The area of the stalk filter that contributes to filtration increases, the filtration resistance is low, the filter life is long, the casting pressure can be controlled as easily as without a filter, and long-term continuous operation is possible. Become. Further, when the filter needs to be replaced, it can be easily replaced.

【図面の簡単な説明】[Brief description of the drawings]

【図1】 本発明に関するストーク用フィルターの組み
立て図。
FIG. 1 is an assembly view of a Stoke filter according to the present invention.

【図2】 本発明に関するストーク用フィルターの組み
立て図。
FIG. 2 is an assembly view of a Stoke filter according to the present invention.

【図3】 圧力鋳造装置の全体図。FIG. 3 is an overall view of a pressure casting apparatus.

【図4】 本発明に関するストークの下端。FIG. 4 is the lower end of the stalk according to the invention.

【符号の説明】[Explanation of symbols]

1…金属溶湯るつぼ、2…ストーク用フィルター、3…
ストーク、4…炉体、5…圧縮空気、6…金属溶湯、7
…金型製品、8…金型、9…型抜きシリンダー、10…
底部、11…湯面、12…下端面、13…蓋、14…
孔、15…湯口、16…給湯口、17…底面、18…固
定型、19…可動型、20…上端部。
1 ... Molten metal crucible, 2 ... Stalk filter, 3 ...
Stoke, 4 ... furnace body, 5 ... compressed air, 6 ... metal melt, 7
... Mold products, 8 ... Molds, 9 ... Cylinders, 10 ...
Bottom part, 11 ... hot water surface, 12 ... lower end surface, 13 ... lid, 14 ...
Holes: 15 gates, 16 gates, 17 bottom, 18 fixed, 19 movable, 20 upper end.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 圧力鋳造装置に用いるストークの周囲
に、該ストークをカバーする多孔質材料製のフィルター
を、該ストークに固定せずに、フィルター上部を開放し
た状態でストークに配置し、フィルターの内側と外側に
同じ圧力がかかるようにしたことを特徴とするストーク
用フィルター。
1. A filter made of a porous material that covers a stalk used for a pressure casting apparatus is arranged on the stalk with the filter upper part being opened without fixing the stalk to the stalk without fixing the stalk to the stalk. A Stoke filter characterized by applying the same pressure to the inside and outside.
【請求項2】 ストーク用フィルターの上端面から金属
溶湯の湯面までの距離が、ストークの下端面からるつぼ
の底部までの距離よりも長くしたことを特徴とする請求
項1記載のストーク用フィルター。
2. The filter according to claim 1, wherein a distance from an upper end surface of the stalk filter to a surface of the molten metal is longer than a distance from a lower end surface of the stalk to a bottom of the crucible. .
JP29502797A 1997-10-14 1997-10-14 Filter for stoke Pending JPH11123527A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29502797A JPH11123527A (en) 1997-10-14 1997-10-14 Filter for stoke

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29502797A JPH11123527A (en) 1997-10-14 1997-10-14 Filter for stoke

Publications (1)

Publication Number Publication Date
JPH11123527A true JPH11123527A (en) 1999-05-11

Family

ID=17815383

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29502797A Pending JPH11123527A (en) 1997-10-14 1997-10-14 Filter for stoke

Country Status (1)

Country Link
JP (1) JPH11123527A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010075951A (en) * 2008-09-25 2010-04-08 Toyota Motor Corp Foreign matter removal device for molten metal
JP6603834B1 (en) * 2018-07-09 2019-11-13 株式会社Prozeal Ceramic filter and manufacturing method thereof
JP2020007219A (en) * 2019-07-25 2020-01-16 株式会社Prozeal Ceramic filter

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010075951A (en) * 2008-09-25 2010-04-08 Toyota Motor Corp Foreign matter removal device for molten metal
JP6603834B1 (en) * 2018-07-09 2019-11-13 株式会社Prozeal Ceramic filter and manufacturing method thereof
WO2020012544A1 (en) * 2018-07-09 2020-01-16 株式会社Prozeal Ceramic filter and manufacturing method therefor
JP2020007219A (en) * 2019-07-25 2020-01-16 株式会社Prozeal Ceramic filter

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