JPH06238414A - Metallic mold for centrifugal casting - Google Patents
Metallic mold for centrifugal castingInfo
- Publication number
- JPH06238414A JPH06238414A JP3234193A JP3234193A JPH06238414A JP H06238414 A JPH06238414 A JP H06238414A JP 3234193 A JP3234193 A JP 3234193A JP 3234193 A JP3234193 A JP 3234193A JP H06238414 A JPH06238414 A JP H06238414A
- Authority
- JP
- Japan
- Prior art keywords
- molten metal
- mold
- centrifugal casting
- opening
- 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.)
- Pending
Links
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、全体を筒状に形成する
と共に、内部に溶湯鋳込空間を備え、その軸心回りに回
転させた状態で前記溶湯鋳込空間へ鋳込みするための開
口部を、前記軸心方向の一端に設けてある遠心鋳造用金
型に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is formed into a tubular shape as a whole, has a molten metal pouring space therein, and an opening for pouring into the molten metal pouring space in a state of being rotated around its axis. The present invention relates to a centrifugal casting mold having a part provided at one end in the axial direction.
【0002】[0002]
【従来の技術】従来、この種の遠心鋳造用金型は、全長
にわたって、ほぼ均一な厚さの筒状に形成して、同温で
の吸熱度及び放熱度がほぼ等しかった。2. Description of the Related Art Heretofore, this type of centrifugal casting mold has been formed into a cylindrical shape having a substantially uniform thickness over the entire length thereof, and the heat absorption and heat dissipation at the same temperature have been substantially equal.
【0003】[0003]
【発明が解決しようとする課題】上述した従来の遠心鋳
造用金型によれば、溶湯が前記遠心鋳造用金型に鋳込ま
れる過程において、溶湯が一端の開口部側から他端部側
まで流れる際に、遠心鋳造用金型や、溶湯鋳込空間に溶
湯の持つ熱が奪われるので、溶湯が他端部側に達したと
きには溶湯の温度は大きく低下して、前記開口部側と前
記他端部側とでは大きな温度差が生じ、前記他端部側で
の溶湯の凝固が早く、極端な場合には、前記他端部側に
達するまでに前記溶湯が凝固してしまって他端部まで溶
湯が供給されないという事態も考えられる。しかも、溶
湯の凝固する速度が前記開口部側と前記他端部側とで大
きく異なり鋳造製品の軸心方向で品質の差が生じ、さら
には、他端部側に相当する部分で、製品にピンホール
や、内部に空洞を生じる、いわゆる「引け巣」の発生等
の欠陥が生じて品質が低下する事があるという欠点があ
った。According to the above-mentioned conventional centrifugal casting mold, in the process in which the molten metal is cast into the centrifugal casting mold, the molten metal flows from the opening side at one end to the other end side. When flowing, the heat of the molten metal is drawn to the centrifugal casting mold and the molten metal pouring space, so that when the molten metal reaches the other end side, the temperature of the molten metal greatly decreases, and the opening side and the A large temperature difference occurs between the other end side and the molten metal solidifies quickly on the other end side. In an extreme case, the molten metal solidifies by the time it reaches the other end side. It is possible that molten metal is not supplied to all parts. Moreover, the speed at which the molten metal solidifies greatly differs between the opening side and the other end side, and there is a difference in quality in the axial direction of the cast product. There is a defect that defects such as pinholes, cavities inside, and so-called "shrinkage cavities" may occur, resulting in deterioration of quality.
【0004】従って、本発明の目的は、上記欠点に鑑
み、溶湯鋳込用の開口部側と他端部側とで鋳造製品の品
質に差が生じにくい遠心鋳造用金型を、提供することに
ある。Therefore, in view of the above-mentioned drawbacks, an object of the present invention is to provide a centrifugal casting mold in which difference in quality of cast products between the opening side for molten metal casting and the other end side hardly occurs. It is in.
【0005】[0005]
【課題を解決するための手段】この目的を達成するため
の本発明の特徴構成は、遠心鋳造用金型の開口部とは反
対側の他端部に保温部を設けてあることにあり、さら
に、前記保温部を前記開口部から遠ざかるほど保温の程
度が大きくなるように形成してあってもよく、その作用
効果は以下の通りである。A characteristic feature of the present invention for achieving this object is that a heat retaining portion is provided at the other end of the centrifugal casting mold opposite to the opening, Further, the heat retaining portion may be formed such that the heat retaining degree increases as the distance from the opening portion increases, and the function and effect thereof are as follows.
【0006】[0006]
【作用】つまり、遠心鋳造用金型(以後金型と略称す
る)の開口部とは反対側の他端部に保温部を設けてある
ので、金型に溶湯を鋳込んだ場合に、溶湯鋳込用の開口
部から他端部にまで溶湯が流れる時に、金型を介して奪
われる溶湯の熱量を前記保温部が抑制するので、他端部
まで溶湯が流れたとしても溶湯の持つ熱は前記金型に奪
われにくくなり、前記金型の他端部側で溶湯が開口部側
に比して早く温度低下することを抑制でき、金型の開口
部側と他端部側とで同様の条件で溶湯を凝固させやすく
なった。In other words, since a heat retaining portion is provided at the other end of the centrifugal casting mold (hereinafter abbreviated as a mold) opposite to the opening, the molten metal is poured into the mold. When the molten metal flows from the pouring opening to the other end, the heat retaining portion suppresses the amount of heat of the molten metal taken through the mold, so even if the molten metal flows to the other end, the heat of the molten metal Is less likely to be deprived by the mold, and it is possible to suppress the temperature of the molten metal from decreasing at the other end side of the mold earlier than that at the opening side. Under similar conditions, it became easier to solidify the melt.
【0007】さらに、保温部を前記開口部から遠ざかる
ほど保温の程度を大きくなるように形成してあれば、金
型の全長にわたって溶湯の温度をほぼ同一に保つ事が出
来るようになり、金型内の全長にわたって溶湯をほぼ同
一の条件で凝固させる事が出来るようになった。Furthermore, if the heat retaining portion is formed so that the degree of heat retaining increases as the distance from the opening increases, it becomes possible to maintain the temperature of the molten metal substantially the same over the entire length of the die. It became possible to solidify the molten metal under almost the same conditions over the entire length.
【0008】[0008]
【発明の効果】従って、溶湯の温度は金型内部の両端に
おいて大きな差が生じず、開口部と他端部とで同様の凝
固条件において溶湯を凝固させる事が出来るので、鋳造
製品の開口部側と他端部側とで、大きな品質の差が生じ
ず、さらに、他端部においてもピンホールや引け巣が生
じにくくなり、製品に欠陥が生じたり品質が低下したり
するという危険性が大きく低下した。その結果、品質の
高い鋳造製品を信頼性高く提供できるようになった。Therefore, the temperature of the molten metal does not significantly differ between the two ends inside the mold, and the molten metal can be solidified under the same solidification conditions at the opening and the other end. Side and the other end side do not have a large difference in quality, and pinholes and shrinkage cavities are less likely to occur at the other end, and there is a risk of product defects or deterioration of quality. It dropped significantly. As a result, it has become possible to reliably provide high-quality cast products.
【0009】[0009]
【実施例】以下に本発明の遠心鋳造用金型(以下金型1
と略称する)のうち、長尺の管を製造する場合に用いら
れる金型1の実施例を図面に基づいて説明する。EXAMPLE A centrifugal casting mold of the present invention (hereinafter referred to as mold 1)
(Abbreviated as "), an embodiment of the mold 1 used for manufacturing a long pipe will be described with reference to the drawings.
【0010】図1に示すように本発明の金型1は、外形
がほぼ円錐台形で、且つ、内部に円柱形の溶湯鋳込空間
3を形成して、両端を開口した筒状体を、耐熱鋼で成型
して構成してある。As shown in FIG. 1, the mold 1 of the present invention is a cylindrical body having an outer shape of a truncated cone and a cylindrical molten metal pouring space 3 formed therein, and having both ends opened. It is made of heat-resistant steel.
【0011】また、前記金型1外周部には、その軸心方
向に間隔をあけた2箇所に、他部より大径の拡径部2
を、全周にわたって設け、それぞれの拡径部2は、同径
の環状に形成してある。また、両端の開口部には、それ
ぞれ環状に形成したリング部材4を、内嵌状態で固着し
て設けて、溶湯鋳込空間3に溶湯Bを鋳込んだ場合に、
遠心力によって溶湯鋳込空間3の金型内壁に広がる溶湯
Bが金型1の両端部から外部に漏れでるのを堰き止める
ことができるようにしてある。尚、溶湯Bは、前記金型
1の、小径側端部の開口から鋳込むものであり、以後溶
湯Bを鋳込む側の端部を開口部5、他方を他端部6と称
するものとする。Further, on the outer peripheral portion of the die 1, there are two enlarged diameter portions 2 having a larger diameter than the other portions at two locations spaced apart in the axial direction thereof.
Is provided over the entire circumference, and each expanded diameter portion 2 is formed in an annular shape having the same diameter. Further, when ring-shaped ring members 4 are fixedly provided in the openings at both ends in an internally fitted state, and the molten metal B is cast into the molten metal casting space 3,
It is possible to prevent the molten metal B, which spreads on the inner wall of the mold of the molten metal casting space 3 from leaking from the both ends of the mold 1 to the outside by the centrifugal force. The molten metal B is cast from the opening of the small-diameter side end portion of the mold 1, and the end portion on the molten metal B casting side is hereinafter referred to as the opening portion 5 and the other end is referred to as the other end portion 6. To do.
【0012】前記金型1の大径の他端部6側の肉厚内に
は、中空の空洞室7を、軸心方向に並んだ状態で多数設
けて、保温部Aを形成してある。Within the wall thickness of the large-diameter other end portion 6 side of the die 1, a large number of hollow cavity chambers 7 are provided in a line in the axial direction to form a heat retaining portion A. .
【0013】前記金型1の下部には、回転駆動装置に連
動可能な状態に連結してある支持ローラー8が設けてあ
り、前記金型1は、拡径部2を支持ローラー8に接当さ
せることによって、支持ローラー8の回転駆動力を前記
金型1に伝達して、その回転力によって金型1が軸心C
周りに回転させられるように、支持ローラー8上に回転
自在に載置されている。At the bottom of the mold 1, there is provided a support roller 8 which is operably linked to a rotation driving device. The mold 1 contacts the expanded diameter portion 2 with the support roller 8. By doing so, the rotational driving force of the support roller 8 is transmitted to the mold 1, and the rotating force causes the mold 1 to move along the axis C.
It is rotatably mounted on the support roller 8 so as to be rotated around.
【0014】また、前記支持ローラー8には、一端部に
鍔部分8aを連設して、その鍔部分8aが、支持ローラ
ー8上に載置された金型1の拡径部2の側面に接当する
事で、金型1の軸心C方向への移動を防止する構造にな
っている。A flange portion 8a is continuously provided at one end of the support roller 8, and the flange portion 8a is provided on the side surface of the expanded diameter portion 2 of the die 1 placed on the support roller 8. By abutting against each other, the structure prevents the die 1 from moving in the direction of the axis C.
【0015】本実施例の前記金型1によれば、金型1及
びリング部材4で囲まれる溶湯鋳込空間3の内壁面を塗
型剤9で覆った後、軸心C周りに金型1を回転させた状
態で、開口部5から溶湯鋳込空間3に溶湯Bを注ぎ込む
事で塗型剤9の内周面に沿って溶湯Bが広がり、開口部
5から他端部6側へ溶湯Bが流れるが、この際に前記保
温部Aにより、溶湯Bの温度が大きく低下するのを抑制
された状態で溶湯鋳込空間3の内面にわたって供給さ
れ、その後溶湯B全体が凝固し始めるので、溶湯B全体
がほぼ同様の条件で凝固し、鋳造製品が長手方向にわた
ってほぼ均質に製造されるようになった。According to the mold 1 of this embodiment, after the inner wall surface of the molten metal pouring space 3 surrounded by the mold 1 and the ring member 4 is covered with the coating agent 9, the mold is made around the axis C. When the molten metal B is poured from the opening 5 into the molten metal pouring space 3 in a state where the liquid 1 is rotated, the molten metal B spreads along the inner peripheral surface of the mold coating agent 9 from the opening 5 to the other end 6 side. The molten metal B flows, but at this time, the temperature of the molten metal B is supplied to the inner surface of the molten metal pouring space 3 in a state where the temperature of the molten metal B is suppressed from being greatly reduced, and then the entire molten metal B starts to solidify. The molten metal B as a whole solidified under substantially the same conditions, and the cast product was manufactured substantially uniformly over the longitudinal direction.
【0016】〔別実施例〕本実施例においては、保温部
Aを金型1肉厚内に設けた多数の空洞室7によって形成
したが、図2に示すように、金型1をほぼ均一な厚さの
筒状に形成しておき、他端部6側に保温材10を被覆し
て保温部Aを形成してあっても良い。この場合でも、溶
湯Bの持つ熱のもっとも奪われ易い他端部6を保温し
て、温度の低下を抑制する構造にしてあるので、金型1
の両端部において溶湯Bの温度差が少なくなり、従来の
金型1の簡単な改造で目的を達成する事が出来る。[Other Embodiments] In this embodiment, the heat retaining portion A was formed by a large number of hollow chambers 7 provided within the thickness of the mold 1. However, as shown in FIG. It may be formed in a tubular shape having various thicknesses, and the heat insulating material 10 may be coated on the other end 6 side to form the heat insulating portion A. Even in this case, since the other end portion 6 where the heat of the molten metal B is most easily deprived of heat is kept warm to suppress the temperature decrease, the mold 1
The temperature difference of the molten metal B becomes small at both end portions, and the purpose can be achieved by a simple modification of the conventional mold 1.
【0017】また、本実施例においてリング部材4を、
環状に形成して、溶湯鋳込空間3の両端の内壁に内嵌し
たが、他端部6側は円盤状の蓋部材(図外)を用いて閉
塞してあってもよく、一方の端部を溶湯鋳込用の開口部
5として開口させてあれば良い。Further, in this embodiment, the ring member 4 is
Although formed into an annular shape and fitted into the inner walls of both ends of the molten metal pouring space 3, the other end 6 side may be closed by using a disc-shaped lid member (not shown). It suffices if the portion is opened as an opening 5 for casting molten metal.
【0018】尚、特許請求の範囲の項に、図面との対照
を便利にするために符号を記すが、該記入により本発明
は添付図面の構成に限定されるものではない。It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the configurations of the accompanying drawings by the entry.
【図1】本発明の実施例における遠心鋳造用金型を示す
図FIG. 1 is a view showing a mold for centrifugal casting according to an embodiment of the present invention.
【図2】本発明の別実施例における遠心鋳造用金型を示
す図FIG. 2 is a view showing a mold for centrifugal casting according to another embodiment of the present invention.
3 溶湯鋳込空間 5 開口部 6 他端部 A 保温部 C 軸心 3 Molten metal casting space 5 Opening 6 Other end A Heat insulation C C axis
Claims (2)
湯鋳込空間(3)を備え、その軸心(C)回りに回転さ
せた状態で前記溶湯鋳込空間(3)へ鋳込みするための
開口部(5)を、前記軸心(C)方向の一端に設けてあ
る遠心鋳造用金型であって、 前記開口部(5)とは反対側の他端部(6)に保温部
(A)を設けてある遠心鋳造用金型。1. The whole is formed into a tubular shape, and a molten metal pouring space (3) is provided inside, and the molten metal pouring space (3) is cast while being rotated around its axis (C). Is a mold for centrifugal casting provided with an opening (5) at one end in the direction of the axis (C), and heat insulation is provided at the other end (6) opposite to the opening (5). A mold for centrifugal casting provided with a part (A).
ら遠ざかるほど保温の程度が大きくなるように形成して
ある請求項1記載の遠心鋳造用金型。2. The mold for centrifugal casting according to claim 1, wherein the heat retaining portion (A) is formed such that the degree of heat retaining increases as the distance from the opening (5) increases.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3234193A JPH06238414A (en) | 1993-02-23 | 1993-02-23 | Metallic mold for centrifugal casting |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3234193A JPH06238414A (en) | 1993-02-23 | 1993-02-23 | Metallic mold for centrifugal casting |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH06238414A true JPH06238414A (en) | 1994-08-30 |
Family
ID=12356260
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3234193A Pending JPH06238414A (en) | 1993-02-23 | 1993-02-23 | Metallic mold for centrifugal casting |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH06238414A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108723322A (en) * | 2018-05-24 | 2018-11-02 | 武汉雄驰机电设备有限公司 | Big specification double-flange copper alloy axle sleeve or copper alloy bearing-bush centre spinning method |
-
1993
- 1993-02-23 JP JP3234193A patent/JPH06238414A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108723322A (en) * | 2018-05-24 | 2018-11-02 | 武汉雄驰机电设备有限公司 | Big specification double-flange copper alloy axle sleeve or copper alloy bearing-bush centre spinning method |
CN108723322B (en) * | 2018-05-24 | 2020-02-21 | 武汉雄驰机电设备有限公司 | Centrifugal casting method for large-size double-flange copper alloy shaft sleeve or copper alloy bearing bush |
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