JPH07284901A - Metallic mold for casting aluminum wheel - Google Patents
Metallic mold for casting aluminum wheelInfo
- Publication number
- JPH07284901A JPH07284901A JP12950394A JP12950394A JPH07284901A JP H07284901 A JPH07284901 A JP H07284901A JP 12950394 A JP12950394 A JP 12950394A JP 12950394 A JP12950394 A JP 12950394A JP H07284901 A JPH07284901 A JP H07284901A
- Authority
- JP
- Japan
- Prior art keywords
- aluminum wheel
- mold
- casting
- spoke
- crossing
- 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
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明はアルミホイールを鋳造
するために使用される金型に関する。FIELD OF THE INVENTION The present invention relates to a mold used for casting aluminum wheels.
【０００２】[0002]
【従来の技術】車両用ディスクホイールは、従来からス
チールで形成されているが、最近になって車両の軽量化
及び外観や意匠性の向上を目的として、アルミニウム合
金で形成したホイールを装着する割合が益々増大してい
る。このアルミホイールは、環状のフランジ部とフラン
ジ部の中心に形成されるボス部とフランジ部とボス部を
連結するスポーク部とを有し、Ｓｉを６〜１３重量％程
度含むＡｌ−Ｓｉ系合金を用いて、低圧鋳造、ダイカス
ト又はスクイズキャスティングなどの手法により製造さ
れることが多い。上記アルミホイールの鋳造に使用され
る金型の形状は、従来よりアルミホイールの形状に対応
する形状にキャビティー、すなわち金型の内面形状を形
成し、金型の外面の形状については特に問題とされてい
なかった。2. Description of the Related Art Vehicle disk wheels have been conventionally made of steel, but recently, in order to reduce the weight of the vehicle and improve its appearance and design, the proportion of wheels made of aluminum alloy has been increased. Is increasing more and more. This aluminum wheel has an annular flange portion, a boss portion formed at the center of the flange portion, a spoke portion connecting the flange portion and the boss portion, and an Al-Si alloy containing about 6 to 13% by weight of Si. Is often manufactured by a method such as low pressure casting, die casting or squeeze casting. The shape of the mold used in the casting of the above-mentioned aluminum wheel is conventionally a cavity corresponding to the shape of the aluminum wheel, that is, the inner surface shape of the mold is formed, and the shape of the outer surface of the mold is particularly problematic. Was not done.
【０００３】[0003]
【発明が解決しようとする課題】しかるにアルミニウム
は強度的に鉄に劣るから、一定の強度を得ようとすると
肉厚を厚くせざるを得ず、この結果重いアルミホイール
とならざるを得なかった。したがって本発明は、十分な
強度を有し、しかも軽いアルミホイールを鋳造すること
ができる金型を提供することを目的とする。However, since aluminum is inferior in strength to iron, in order to obtain a certain strength, the wall thickness must be increased, resulting in a heavy aluminum wheel. . Therefore, an object of the present invention is to provide a metal mold which has sufficient strength and is capable of casting a light aluminum wheel.
【０００４】[0004]
【課題を解決するための手段】本発明は、上型と下型と
によって形成した、スポーク部とフランジ部を有するア
ルミホイールに対応する形状を有するキャビティを有
し、このキャビティのスポーク部とフランジ部との交差
部に対応する部分の下型外面に、冷却媒体を吹き付ける
凹部を設けることによって、上記目的を達成したもので
ある。SUMMARY OF THE INVENTION The present invention has a cavity formed by an upper die and a lower die and having a shape corresponding to an aluminum wheel having a spoke portion and a flange portion. The above object is achieved by providing a concave portion for spraying a cooling medium on the outer surface of the lower die corresponding to the intersection with the portion.
【０００５】[0005]
【作用】アルミホイールのスポーク部に作用する力は半
径方向の圧縮力であり、フランジ部に作用する力は円周
方向の圧縮力であるから、共に薄肉に形成しても強度的
に強い。しかしスポーク部とフランジ部との交差部には
曲げモーメントが作用するから、薄肉に形成すると強度
的に弱くなる。しかるに本発明は上記の構成であるか
ら、上記凹部に予め冷却媒体を吹き付けた状態でアルミ
ニウム合金の溶湯を流し込むと、交差部のアルミニウム
合金は急冷される。したがって薄肉に形成しても交差部
の強度が向上するから、軽量にして十分な強度を有する
アルミホイールが鋳造される。[Function] Since the force acting on the spokes of the aluminum wheel is the compressive force in the radial direction and the force acting on the flange is the compressive force in the circumferential direction, both of them are strong in strength even if they are formed thin. However, since a bending moment acts on the intersection of the spoke portion and the flange portion, if it is made thin, the strength becomes weak. However, since the present invention has the above-described configuration, when the molten aluminum alloy is poured into the recess with the cooling medium sprayed in advance, the aluminum alloy at the intersection is rapidly cooled. Therefore, the strength of the intersecting portion is improved even when the aluminum wheel is formed thin, so that an aluminum wheel that is lightweight and has sufficient strength is cast.
【０００６】[0006]
【実施例】本発明を図面によって説明する。図１は本発
明の一実施例を示し、鋳造すべきアルミホイール１の形
状をしたキャビティーが、上型２ａと下型２ｂと横型２
ｃとからなる金型２によって形成されている。アルミホ
イール１のスポーク部１ａとフランジ部１ｂとの交差部
１ｃに対応する部分の下型２ｂの外面には、水滴３を吹
き付ける凹部２ｄが設けられている。なおスポーク部１
ａの外表面はデザイン面となり、フランジ部１ｂの外表
面はタイヤ面となる。また凹部２ｄ以外の金型２の肉厚
は５０〜１００ｍｍ程度であるが、凹部２ｄでの肉厚は
７〜１０ｍｍ程度である。本実施例は以上のように形成
されており、この金型２によってアルミホイール１を鋳
造（例えば低圧鋳造）するときには、先ず水滴３を凹部
２ｄに吹き付けて、交差部１ｃに対応する部分の金型
（局所部の温度３００℃）を局所的に冷却しておき、そ
の状態でアルミニウム合金（例えばＪＩＳ ＡＣ４Ｃ
材）の溶湯（温度７００℃）を注入する。これにより交
差部１ｃの溶湯は急却されるから、金属組織が緻密化
し、且つ指向性凝固が生じて機械的強度の向上が図られ
る。本実施例による交差部１ｃより供試片を切り出して
強度試験を行ない、従来例、すなわち凹部２ｄを設け
ず、また水滴３を吹き付けないで鋳造した交差部との比
較をしたところ、引張強さは従来例の２１ｋｇ／ｍｍ2
に対して、実施例では２６〜３０ｋｇ／ｍｍ2であり、
伸びは従来例の３〜４％に対して、実施例では１０〜１
５％であった。このようにアルミホイール１の脆弱な部
分、すなわち交差部１ｃの強度向上が図られるから、軽
量にして十分な強度を有するアルミホイール１が鋳造さ
れる。また同時に、鋳造サイクルの時間短縮も図られ
る。すなわち図１に示すスポーク部１ａの各部位Ａ，
Ｂ，Ｃ，Ｄでの凝固完了までの時間を図２に示すが、同
図よりほぼいずれの部位でも凝固時間が短縮されている
ことが分かる。この結果、従来例の鋳造サイクルの時間
は約６分であったが、本実施例では５分強に短縮され
た。なお本実施例では凹部２ｄに水滴３を吹き付けた
が、水滴３に代えて空気などを吹き付けることもでき
る。The present invention will be described with reference to the drawings. FIG. 1 shows an embodiment of the present invention in which a cavity in the shape of an aluminum wheel 1 to be cast has an upper mold 2a, a lower mold 2b and a horizontal mold 2.
It is formed by a mold 2 including c. On the outer surface of the lower mold 2b corresponding to the intersection 1c between the spoke 1a and the flange 1b of the aluminum wheel 1, a recess 2d for spraying the water droplet 3 is provided. Spoke part 1
The outer surface of a is a design surface, and the outer surface of the flange portion 1b is a tire surface. The thickness of the mold 2 other than the recess 2d is about 50 to 100 mm, but the thickness of the recess 2d is about 7 to 10 mm. The present embodiment is formed as described above. When casting the aluminum wheel 1 with this die 2 (for example, low pressure casting), first, the water droplets 3 are sprayed on the concave portion 2d, and the metal of the portion corresponding to the intersection 1c is cast. The mold (local temperature of 300 ° C.) is locally cooled, and in that state an aluminum alloy (for example, JIS AC4C
A molten metal (temperature of 700 ° C.) is injected. As a result, the molten metal at the intersection 1c is suddenly dropped, so that the metal structure is densified and the directional solidification occurs to improve the mechanical strength. A test piece was cut out from the intersecting portion 1c according to this example, and a strength test was performed. As a result, a comparison was made with a conventional example, that is, an intersecting portion that was formed without forming the concave portion 2d and spraying the water droplets 3, and found that the tensile strength was Is 21 kg / mm 2 of the conventional example
On the other hand, in the example, it is 26 to 30 kg / mm 2 ,
The elongation is 3 to 4% in the conventional example, while the elongation is 10 to 1 in the example.
It was 5%. Since the strength of the fragile portion of the aluminum wheel 1, that is, the crossing portion 1c is improved in this manner, the aluminum wheel 1 that is lightweight and has sufficient strength is cast. At the same time, the casting cycle time can be shortened. That is, each part A of the spoke part 1a shown in FIG.
The time until the completion of coagulation in B, C, and D is shown in FIG. 2, and it can be seen from FIG. 2 that the coagulation time is shortened at almost any part. As a result, the casting cycle time of the conventional example was about 6 minutes, but in this example, it was shortened to just over 5 minutes. In this embodiment, the water droplet 3 is sprayed on the recess 2d, but air or the like may be sprayed instead of the water droplet 3.
【０００７】[0007]
【発明の効果】本発明は、アルミホイールのスポーク部
とフランジ部との交差部を局所的に冷却しつつ鋳造する
ことができる金型であるから、交差部の金属組織の緻密
化と指向性凝固とが図られ、これによって機械的強度が
向上し、したがって軽量にして十分な強度を有するアル
ミホイールが鋳造される。また鋳造サイクルの時間が短
縮するから、生産性の向上を図ることができる。EFFECT OF THE INVENTION Since the present invention is a mold that can be cast while locally cooling the intersections of the spokes and the flanges of the aluminum wheel, the metal structure of the intersections is densified and the directivity is improved. Solidification is achieved, which improves the mechanical strength, and thus casts an aluminum wheel that is lightweight and has sufficient strength. Further, since the casting cycle time is shortened, productivity can be improved.
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の一実施例を示す縦断面図FIG. 1 is a vertical sectional view showing an embodiment of the present invention.
【図２】フランジ部各部位での凝固時間を従来例と比較
して示した図FIG. 2 is a diagram showing the coagulation time at each part of the flange portion in comparison with the conventional example.
１…アルミホイール １ａ…スポーク部 １
ｂ…フランジ部 １ｃ…交差部 ２…金型 ２
ａ…上型 ２ｂ…下型 ２ｃ…横型 ２
ｄ…凹部 ３…水滴 Ａ，Ｂ，Ｃ，Ｄ…スポーク部
部位1 ... Aluminum wheel 1a ... Spoke part 1
b ... Flange portion 1c ... Intersection portion 2 ... Mold 2
a ... upper mold 2b ... lower mold 2c ... horizontal mold 2
d ... Recessed portion 3 ... Water droplet A, B, C, D ... Spoke portion site
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 // Ｂ６０Ｂ 3/06 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Office reference number FI technical display area // B60B 3/06
Claims (1)
部とフランジ部を有するアルミホイールに対応する形状
を有するキャビティを有し、このキャビティのスポーク
部とフランジ部との交差部に対応する部分の下型外面
に、冷却媒体を吹き付ける凹部を設けたアルミホイール
鋳造用金型。1. A cavity having a shape corresponding to an aluminum wheel having a spoke portion and a flange portion, which is formed by an upper die and a lower die, and has a cavity corresponding to an intersection of the spoke portion and the flange portion of the cavity. A mold for casting aluminum wheels, in which a recess for spraying a cooling medium is provided on the outer surface of the lower mold part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12950394A JPH07284901A (en) | 1994-04-13 | 1994-04-13 | Metallic mold for casting aluminum wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12950394A JPH07284901A (en) | 1994-04-13 | 1994-04-13 | Metallic mold for casting aluminum wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07284901A true JPH07284901A (en) | 1995-10-31 |
Family
ID=15011099
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12950394A Pending JPH07284901A (en) | 1994-04-13 | 1994-04-13 | Metallic mold for casting aluminum wheel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07284901A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101791685A (en) * | 2009-12-23 | 2010-08-04 | 常州市蓝托金属制品有限公司 | Die casting mould special for ultrathin-wall non-leakage aviation aluminium alloy element |
| CN102601341A (en) * | 2012-03-26 | 2012-07-25 | 中信戴卡轮毂制造股份有限公司 | Improved air cooling system of wheel mould |
| CN102658364A (en) * | 2012-05-31 | 2012-09-12 | 昆山市浩坤机械有限公司 | Die water-cooling circulation structure |
| CN104190899A (en) * | 2014-07-14 | 2014-12-10 | 中信戴卡股份有限公司 | Low-pressure casting mold of melt spinning wheel and process thereof |
| CN104550774A (en) * | 2014-12-25 | 2015-04-29 | 江苏凯特汽车部件有限公司 | Directional solidification device for multi-spoke aluminum alloy wheel |
| WO2017076399A1 (en) * | 2015-11-04 | 2017-05-11 | Schmidt, Torsten | Method and device for overall temperature-control close to the mould cavity of temperature-controlled shell-type moulds, using intercommunicating media in polyhedral spaces |
| CN106670426A (en) * | 2017-01-03 | 2017-05-17 | 浙江六和轻机械有限公司 | Aluminum alloy casting hub full water cooling plant |
| CN106694855A (en) * | 2017-03-19 | 2017-05-24 | 中信戴卡股份有限公司 | Low-pressure casting aluminum wheel mold |
| TWI672185B (en) * | 2018-11-02 | 2019-09-21 | 財團法人金屬工業研究發展中心 | Casting method and metal mold |
-
1994
- 1994-04-13 JP JP12950394A patent/JPH07284901A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101791685A (en) * | 2009-12-23 | 2010-08-04 | 常州市蓝托金属制品有限公司 | Die casting mould special for ultrathin-wall non-leakage aviation aluminium alloy element |
| CN102601341A (en) * | 2012-03-26 | 2012-07-25 | 中信戴卡轮毂制造股份有限公司 | Improved air cooling system of wheel mould |
| CN102658364A (en) * | 2012-05-31 | 2012-09-12 | 昆山市浩坤机械有限公司 | Die water-cooling circulation structure |
| CN104190899A (en) * | 2014-07-14 | 2014-12-10 | 中信戴卡股份有限公司 | Low-pressure casting mold of melt spinning wheel and process thereof |
| CN104550774A (en) * | 2014-12-25 | 2015-04-29 | 江苏凯特汽车部件有限公司 | Directional solidification device for multi-spoke aluminum alloy wheel |
| WO2017076399A1 (en) * | 2015-11-04 | 2017-05-11 | Schmidt, Torsten | Method and device for overall temperature-control close to the mould cavity of temperature-controlled shell-type moulds, using intercommunicating media in polyhedral spaces |
| CN106670426A (en) * | 2017-01-03 | 2017-05-17 | 浙江六和轻机械有限公司 | Aluminum alloy casting hub full water cooling plant |
| CN106694855A (en) * | 2017-03-19 | 2017-05-24 | 中信戴卡股份有限公司 | Low-pressure casting aluminum wheel mold |
| TWI672185B (en) * | 2018-11-02 | 2019-09-21 | 財團法人金屬工業研究發展中心 | Casting method and metal mold |
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