JPH08155619A - Metallic mold for centrifugal casting - Google Patents
Metallic mold for centrifugal castingInfo
- Publication number
- JPH08155619A JPH08155619A JP6321224A JP32122494A JPH08155619A JP H08155619 A JPH08155619 A JP H08155619A JP 6321224 A JP6321224 A JP 6321224A JP 32122494 A JP32122494 A JP 32122494A JP H08155619 A JPH08155619 A JP H08155619A
- Authority
- JP
- Japan
- Prior art keywords
- inner diameter
- ring
- mold
- shaped
- centrifugal casting
- 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)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、長尺棒状体の先端に
大径部を有するチタンまたはチタン合金製鋳物、例えば
自動車のチタンまたはチタン合金製エンジンバルブを鋳
造するための遠心鋳造用金型に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a centrifugal casting mold for casting a titanium or titanium alloy casting having a large diameter portion at the tip of a long rod-shaped body, such as an automobile titanium or titanium alloy engine valve. It is about.
【０００２】[0002]
【従来の技術】従来、チタンまたはチタン合金製エンジ
ンバルブ製造用金型として、図４の断面図に示されるよ
うに、内径口５を有し分割面８で上下に分割可能なリン
グ状金型１および内径口６を有し左右に分割可能なリン
グ状スペーサ２からなり、上記リング状金型１およびリ
ング状スペーサ２を交互に同心円状に積み重ねて固定し
てなる遠心鋳造用金型があることは知られている。2. Description of the Related Art Conventionally, as a mold for manufacturing an engine valve made of titanium or titanium alloy, as shown in the sectional view of FIG. 4, a ring-shaped mold having an inner diameter port 5 and vertically separable by a dividing surface 8. 1 and a ring-shaped spacer 2 which has an inner diameter port 6 and can be divided into right and left, and is a centrifugal casting mold in which the ring-shaped mold 1 and the ring-shaped spacer 2 are alternately stacked in a concentric pattern and fixed. It is known.
【０００３】上記リング状金型２には分割面８に沿って
キャビティ３が放射状に複数個設けられており、キャビ
ティ３はステム空間１３およびヘッド空間２３で構成さ
れている。このリング状金型２の内径口５およびリング
状スペーサ２の内径口６により湯道７が形成され、この
遠心鋳造用金型の湯道７を軸として回転させ、この回転
している遠心鋳造用金型の湯道７にチタンまたはチタン
合金溶湯を注入することによりエンジンバルブを鋳造し
ていた。遠心鋳造を完了した時点でリング状金型１およ
びリング状スペーサ２の固定を解放し、リング状スペー
サ２を引き抜いたのちリング状金型１を分解し、エンジ
ンバルブ鋳物を取り出す。この時、リング状スペーサ２
の左右両端に引っ掛け用の開口９を設けておき、開口９
に引っ張り金具（図示せず）を引っ掛けて左右両方に引
き抜くようにしておくとよい。The ring-shaped mold 2 is provided with a plurality of cavities 3 radially along the dividing surface 8. The cavities 3 are composed of a stem space 13 and a head space 23. A runner 7 is formed by the inner diameter port 5 of the ring-shaped mold 2 and the inner diameter port 6 of the ring-shaped spacer 2, and the runner 7 of the mold for centrifugal casting is rotated to rotate the centrifugal mold. The engine valve was cast by injecting titanium or titanium alloy melt into the runner 7 of the mold. When the centrifugal casting is completed, the fixing of the ring-shaped mold 1 and the ring-shaped spacer 2 is released, the ring-shaped spacer 2 is pulled out, the ring-shaped mold 1 is disassembled, and the engine valve casting is taken out. At this time, the ring-shaped spacer 2
The openings 9 for hooking are provided on both left and right ends of the
It is advisable to hook a pulling metal fitting (not shown) on the and pull it out to both the left and right.
【０００４】[0004]
【発明が解決しようとする課題】しかし、リング状金型
１に設けられているキャビティ３は、湯道７の近くに細
いステム空間１３が設けられており、湯道７から最も遠
方にヘッド空間２３が設けられているので、細いステム
空間１３を通してヘッド空間２３に十分に湯が迴らず、
ヘッド空間２３の鋳物部分に引け巣が生じてエンジンバ
ルブ鋳物の欠陥品が生じることが多かった。However, the cavity 3 provided in the ring-shaped mold 1 has a thin stem space 13 near the runner 7, and the head space is farthest from the runner 7. Since 23 is provided, hot water does not sufficiently reach the head space 23 through the narrow stem space 13,
In many cases, shrinkage cavities were generated in the casting portion of the head space 23, and defective products of engine valve castings were generated.
【０００５】さらに、ステムおよびヘッドからなるエン
ジンバルブ鋳物を湯道７の残留溶湯による鋳塊から分離
しやすくするために、図４に示されるように、リング状
金型１のステム空間３の湯道７に最も近い所に堰４を設
ける場合もあるが、このような堰４のあるキャビティ３
を設けたリング状金型３を用いた場合には、エンジンバ
ルブ鋳物の欠陥品発生率は一層増加した。Further, in order to facilitate separation of the engine valve casting consisting of the stem and the head from the ingot by the residual molten metal in the runner 7, as shown in FIG. 4, the molten metal in the stem space 3 of the ring-shaped die 1 is melted. The weir 4 may be provided at a position closest to the road 7, but the cavity 3 having such a weir 4 may be provided.
When the ring-shaped mold 3 provided with was used, the defective rate of engine valve castings was further increased.
【０００６】[0006]
【課題を解決するための手段】そこで、本発明者等は、
かかるエンジンバルブヘッドの鋳込み不良の発生を防止
するべく研究を行った結果、図１〜図３に示される如
く、リング状金型１の内径口５の内径をリング状スペー
サ２の内径口の内径よりも大きくし、湯道７にリング状
スペーサとリング状スペーサの間に湯溜り１１を形成す
るように組立ててなる遠心鋳造用金型を用いてエンジン
バルブを遠心鋳造すると、エンジンバルブのヘッドに鋳
造欠陥が発生せず、常に健全な鋳物が得られるという研
究結果が得られたのである。Therefore, the present inventors have
As a result of research to prevent such casting failure of the engine valve head, as shown in FIGS. 1 to 3, the inner diameter of the inner diameter opening 5 of the ring-shaped mold 1 is changed to the inner diameter of the inner diameter opening of the ring-shaped spacer 2. If the engine valve is centrifugally cast using a centrifugal casting mold that is assembled to form a pool 11 between the ring-shaped spacer and the ring-shaped spacer on the runner 7, The research results were obtained that casting defects do not occur and a sound casting is always obtained.
【０００７】この発明は、かかる研究結果に基づいてな
されたものであって、内径口５を有し、かつステム空間
１３およびヘッド空間２３からなるキャビティ３をもっ
た上下に分割可能なリング状金型１、並びに内径口６を
有し、かつ左右に分割可能なリング状スペーサ２からな
り、上記リング状金型１をリング状スペーサ２で挟むよ
うに交互に同心円状に積み重ねて固定してなる遠心鋳造
用金型において、上記リング状金型１の内径口５の内径
を、上記リング状スペーサ２の内径口６の内径よりも大
きくした遠心鋳造用金型に特徴を有するものである。The present invention was made on the basis of the results of such research, and has a ring-shaped metal having an inner diameter port 5 and having a cavity 3 composed of a stem space 13 and a head space 23 and which can be divided into upper and lower parts. It is composed of a mold 1 and a ring-shaped spacer 2 which has an inner diameter opening 6 and can be divided into right and left, and is fixed by alternately stacking the ring-shaped molds 1 in concentric circles so as to be sandwiched by the ring-shaped spacers 2. The centrifugal casting mold is characterized in that the inner diameter of the inner diameter port 5 of the ring-shaped mold 1 is larger than the inner diameter of the inner diameter port 6 of the ring-shaped spacer 2.
【０００８】また、この発明の遠心鋳造用金型には、図
２に示されるように、ステム空間１３の内径口５に面す
る端部に堰４が設けられていてもよい。In the centrifugal casting mold of the present invention, as shown in FIG. 2, a weir 4 may be provided at the end of the stem space 13 facing the inner diameter port 5.
【０００９】[0009]
【作用】この発明の遠心鋳造用金型は、回転円板１０の
上に、左右に分割可能なリング状スペーサ２を載置し、
その上に上下に分割可能なリング状金型１を載置し、さ
らにリング状スペーサ２およびリング状金型１を積み重
ね、最後にリング状スペーサ２を載置し、その上に必要
に応じて湯口金型１２を載置してボルト等の固定手段
（図示せず）により回転円板１０に固定して組立てる。
この時のリング状スペーサ２とリング状金型１の組合せ
個数は何ら制限されるものではない。この場合、リング
状金型１とリング状スペーサ２とは同心円状に積み重ね
られるので、湯道７のリング状金型１の部分は太くなっ
て湯溜り１１を形成し、この湯溜り１１を有する湯道７
に溶湯を注入し、遠心鋳造鋳型を回転させると、湯溜り
１１の溶湯は押湯の働きをし、キャビティ３のすみずみ
まで湯が送り込まれ、鋳物欠陥の発生が防止されるもの
と考えられる。In the centrifugal casting mold of the present invention, the ring-shaped spacer 2 which can be divided into right and left is placed on the rotating disk 10.
A ring-shaped mold 1 which can be divided into upper and lower parts is placed on top of it, and further a ring-shaped spacer 2 and a ring-shaped mold 1 are stacked, and finally the ring-shaped spacer 2 is placed and, if necessary, on top of that. The sprue mold 12 is placed and fixed to the rotating disc 10 by a fixing means (not shown) such as a bolt to assemble.
At this time, the number of combinations of the ring-shaped spacer 2 and the ring-shaped mold 1 is not limited at all. In this case, since the ring-shaped mold 1 and the ring-shaped spacer 2 are stacked concentrically, the portion of the ring-shaped mold 1 of the runner 7 is thickened to form the basin 11, and the basin 11 is provided. Runner 7
It is considered that when the molten metal is poured into the mold and the centrifugal casting mold is rotated, the molten metal in the pool 11 acts as a feeder, and the molten metal is sent to every corner of the cavity 3 to prevent casting defects. .
【００１０】この発明の遠心鋳造用金型のスペーサ２の
内径口６にはテーパ６′が設けられている方が好ましい
が、図３に示されるようにテーパがなくてもよい。Although it is preferable that the inner diameter port 6 of the spacer 2 of the centrifugal casting mold of the present invention is provided with a taper 6 ', it may not have a taper as shown in FIG.
【００１１】[0011]
実施例１ 中心部の内径口径が３００mmの寸法を有し、分割面８を
境にして上下に分割可能でありかつ半円状に分割可能で
ある構造を有し、さらに内部に内径：８mmの棒状ステム
空間１３および内径：３０mmのヘッド空間２３からなる
キャビテイ３を放射状に４０個形成した厚さ：４０mmの
ベリリウム銅製リング状金型１を２組用意した。Example 1 The inner diameter of the central part has a size of 300 mm, and it has a structure that can be vertically divided and can be divided into semicircles with the dividing surface 8 as a boundary. Two sets of beryllium-copper ring-shaped molds 1 having a thickness of 40 mm were prepared by radially forming 40 cavities 3 each having a rod-shaped stem space 13 and a head space 23 having an inner diameter of 30 mm.
【００１２】このベリリウム銅製リング状金型１のキャ
ビティ３の棒状ステム空間１３の内径口５との境界に
は、図２に示されるごとく、直径：６mmの堰４が設けら
れている。As shown in FIG. 2, a weir 4 having a diameter of 6 mm is provided at the boundary with the inner diameter port 5 of the rod-shaped stem space 13 of the cavity 3 of the beryllium copper ring-shaped mold 1.
【００１３】さらに、中心部の内径口径が２７５mmの寸
法を有し、厚さ：２５mmの純銅製リング状スペーサ２を
３個用意した。この純銅製リング状スペーサ２の内径口
６にはテーパ６′が設けられている。Furthermore, three pure copper ring-shaped spacers 2 having a diameter of 275 mm at the center and a thickness of 25 mm were prepared. A taper 6'is provided on the inner diameter port 6 of the ring spacer 2 made of pure copper.
【００１４】これらリング状金型１およびリング状スペ
ーサ２を同心円状に図２に示される如く積み重ねて遠心
鋳造用金型を作製した。この遠心鋳造用金型は内径口径
の大きなベリリウム銅製リング状金型１と内径口径の小
さな純銅製リング状スペーサ２が積み重ねられているの
で、この発明の遠心鋳造用金型の湯道７には湯溜り１１
が形成されている。The ring-shaped mold 1 and the ring-shaped spacer 2 were concentrically stacked as shown in FIG. 2 to prepare a mold for centrifugal casting. In this centrifugal casting mold, a beryllium copper ring-shaped mold 1 having a large inner diameter and a pure copper ring-shaped spacer 2 having a small inner diameter are stacked, so that the runner 7 of the centrifugal casting mold of the present invention is Hot water pool 11
Are formed.
【００１５】この遠心鋳造用金型を回転円板１０に固定
し、回転数：５００r.p.m で回転させながら温度：１８
００℃のチタン合金溶湯（成分組成：Ｔｉ−６％Ａｌ−
４％Ｖ）を湯溜り１１を有する湯道７に注入し、同時に
８０個のチタン合金製エンジンバルブを作製したとこ
ろ、鋳込み不良による欠陥のあるチタン合金製エンジン
バルブは全く見られなかった。This centrifugal casting mold was fixed to the rotating disk 10, and the temperature was set to 18 while rotating at a rotation speed of 500 rpm.
Molten titanium alloy at 00 ° C (composition: Ti-6% Al-
4% V) was injected into the runner 7 having the basin 11, and at the same time, 80 titanium alloy engine valves were manufactured. No titanium alloy engine valves having defects due to defective casting were found.
【００１６】従来例１ ベリリウム銅製リング状金型の内径口径および純銅製リ
ング状スペーサの内径口径が共に３００mmの金型および
スペーサを積み重ね、湯溜りのない円柱状の湯道７を有
する以外は実施例１と同一の形状構造および寸法を有す
る遠心鋳造用金型を用意し、この従来の遠心鋳造用金型
を回転円板１０に固定し、以下実施例１と同一条件でチ
タン合金溶湯を鋳込み、チタン合金製エンジンバルブを
同時に８０個作製したところ、２３個のエンジンバルブ
に鋳込み不良による欠陥が見られた。Conventional Example 1 Implemented except that a die and a spacer having an inner diameter of a beryllium copper ring-shaped die and an inner diameter of a pure copper ring-shaped spacer are both 300 mm are stacked and a cylindrical runner 7 having no puddle is provided. A centrifugal casting mold having the same shape structure and dimensions as in Example 1 was prepared, this conventional centrifugal casting mold was fixed to a rotating disk 10, and a molten titanium alloy was cast under the same conditions as in Example 1 below. When 80 titanium alloy engine valves were manufactured at the same time, 23 engine valves had defects due to defective casting.
【００１７】[0017]
【発明の効果】上述のように、この発明の遠心鋳造用金
型には湯溜りを有する湯道を有するので、鋳込み不良に
よる鋳物欠陥は全く見られず、鋳物の歩留りが大幅に改
善され、チタン合金製エンジンバルブのコスト削減に大
いに貢献しうるものである。As described above, since the mold for centrifugal casting of the present invention has the runner having the pool, no casting defect due to defective casting is observed, and the yield of the casting is greatly improved. This can greatly contribute to the cost reduction of titanium alloy engine valves.
【図１】この発明の遠心鋳造用金型の断面図である。FIG. 1 is a cross-sectional view of a centrifugal casting mold of the present invention.
【図２】この発明の遠心鋳造用金型の断面図である。FIG. 2 is a sectional view of a centrifugal casting mold of the present invention.
【図３】この発明の遠心鋳造用金型の断面図である。FIG. 3 is a cross-sectional view of a centrifugal casting mold of the present invention.
【図４】従来の遠心鋳造用金型の断面図である。FIG. 4 is a cross-sectional view of a conventional centrifugal casting mold.
１ リング状金型 ２ リング状スペーサ ３ キャビティ ４ 堰 ５ 内径口 ６ 内径口 ７ 湯道 ８ 分割面 ９ 開口 １０ 回転円板 １１ 湯溜り １２ 湯口金型 １３ ステム空間 ２３ ヘッド空間 DESCRIPTION OF SYMBOLS 1 ring-shaped die 2 ring-shaped spacer 3 cavity 4 weir 5 inner diameter mouth 6 inner diameter mouth 7 runner 8 dividing surface 9 opening 10 rotating disc 11 hot water pool 12 sprue die 13 stem space 23 head space
Claims (2)
ド空間からなるキャビティをもった上下に分割可能なリ
ング状金型と、 内径口を有しかつ左右に分割可能なリング状スペーサと
からなり、上記リング状金型をリング状スペーサで挟む
ように交互に同心円状に積み重ねて固定してなる遠心鋳
造用金型において、 上記リング状金型の内径口の内径を上記リング状スペー
サの内径口の内径よりも大きくしたことを特徴とする遠
心鋳造用金型。1. A ring-shaped mold which has an inner diameter opening and has a cavity composed of a stem space and a head space and which is vertically separable, and a ring-shaped spacer which has an inner diameter opening and is divisible into left and right. In a centrifugal casting mold in which the ring-shaped molds are alternately stacked and fixed so as to be sandwiched by ring-shaped spacers, the inner diameter of the inner diameter of the ring-shaped mold is set to the inner diameter of the ring-shaped spacer. A mold for centrifugal casting characterized by being made larger than the inner diameter of.
堰が設けられていることを特徴とする請求項１記載の遠
心鋳造用金型。2. The centrifugal casting mold according to claim 1, wherein a weir is provided at an end of the stem space facing the inner diameter port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06321224A JP3102288B2 (en) | 1994-11-30 | 1994-11-30 | Centrifugal casting mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06321224A JP3102288B2 (en) | 1994-11-30 | 1994-11-30 | Centrifugal casting mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08155619A true JPH08155619A (en) | 1996-06-18 |
| JP3102288B2 JP3102288B2 (en) | 2000-10-23 |
Family
ID=18130199
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06321224A Expired - Fee Related JP3102288B2 (en) | 1994-11-30 | 1994-11-30 | Centrifugal casting mold |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3102288B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ303638B6 (en) * | 2011-12-09 | 2013-01-23 | Zkl Hanusovice A.S. | Cast-iron mould for profiled centrifugal casting of brass half-finished products of roller-contact bearing cages with precast pockets |
| JP2014042917A (en) * | 2012-08-24 | 2014-03-13 | Showa Denko Kk | Method for manufacturing cast product |
| CN107876722A (en) * | 2013-03-11 | 2018-04-06 | 冶联科技地产有限责任公司 | Enhanced technique for centrifugal casting of molten materials |
-
1994
- 1994-11-30 JP JP06321224A patent/JP3102288B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ303638B6 (en) * | 2011-12-09 | 2013-01-23 | Zkl Hanusovice A.S. | Cast-iron mould for profiled centrifugal casting of brass half-finished products of roller-contact bearing cages with precast pockets |
| JP2014042917A (en) * | 2012-08-24 | 2014-03-13 | Showa Denko Kk | Method for manufacturing cast product |
| CN107876722A (en) * | 2013-03-11 | 2018-04-06 | 冶联科技地产有限责任公司 | Enhanced technique for centrifugal casting of molten materials |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3102288B2 (en) | 2000-10-23 |
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