JPH01150432A - Manufacture of hollow aluminum wheel - Google Patents
Manufacture of hollow aluminum wheelInfo
- Publication number
- JPH01150432A JPH01150432A JP30997387A JP30997387A JPH01150432A JP H01150432 A JPH01150432 A JP H01150432A JP 30997387 A JP30997387 A JP 30997387A JP 30997387 A JP30997387 A JP 30997387A JP H01150432 A JPH01150432 A JP H01150432A
- Authority
- JP
- Japan
- Prior art keywords
- support member
- mold
- aluminum wheel
- pattern
- model
- 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
- 229910052782 aluminium Inorganic materials 0.000 title claims abstract description 23
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title claims abstract description 23
- 238000004519 manufacturing process Methods 0.000 title claims description 12
- 239000011347 resin Substances 0.000 claims abstract description 18
- 229920005989 resin Polymers 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 15
- 239000002002 slurry Substances 0.000 claims abstract description 10
- 229910052751 metal Inorganic materials 0.000 claims abstract description 7
- 239000002184 metal Substances 0.000 claims abstract description 7
- 239000006260 foam Substances 0.000 claims description 18
- 239000011248 coating agent Substances 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 4
- 238000005187 foaming Methods 0.000 abstract 6
- 238000005266 casting Methods 0.000 description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- 239000011247 coating layer Substances 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
- 238000009863 impact test Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- -1 polyethylene Polymers 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000008119 colloidal silica Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910052845 zircon Inorganic materials 0.000 description 2
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000005347 demagnetization Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229920006248 expandable polystyrene Polymers 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000007581 slurry coating method Methods 0.000 description 1
Landscapes
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、車両用のアルミホイールの製造方法に係り、
特に中空のアルミホイールを製造する方法に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a method of manufacturing an aluminum wheel for a vehicle,
In particular, it relates to a method of manufacturing hollow aluminum wheels.
（従来の技術）
近年、車両の軽量化が進められる中で、アルミホイール
の利用が拡大しつ＼ある。従来、このアルミホイールは
中実のものとして供されており、これをさらに中空化で
きれば一層の軽量化を図れることとなる。(Prior Art) In recent years, as vehicles have become lighter, the use of aluminum wheels has been expanding. Conventionally, this aluminum wheel has been provided as a solid piece, but if it could be made even more hollow, it would be possible to further reduce the weight.
ところで、中空鋳物を製造するには、一般に中子を用い
るが、この場合該中子を鋳型に納めるために中太が必要
となり、ホイールのように比較的肉薄で複雑な形状を有
する鋳物を対象とした場合には、型設計上、該中太を設
けるのが困難で実質その利用は断念せざるを得ない。By the way, in order to manufacture hollow castings, generally a core is used, but in this case a thick core is required to fit the core into the mold, and this method is used for castings with relatively thin walls and complex shapes such as wheels. In this case, it would be difficult to provide the center thickness due to mold design, and its use would essentially have to be abandoned.
そこで１例えば特開昭８０−２２７９８４号公報に示さ
れるごとき、パイプを鋳ぐるんで中空化する方法を利用
することも考えられる。この方法は、予め支持部材（ス
トラット）を用いてパイプを組立て、この組立体を、金
型に埋め込んだ磁石あるいはあるいは組立体のもつ弾性
力を利してストラットを介して金型に支持し、該パイプ
を鋳ぐるんで中空のピストンを製造するようにしたもの
である。Therefore, it is conceivable to use a method of casting a pipe to make it hollow, as disclosed in, for example, Japanese Unexamined Patent Publication No. 80-227984. In this method, pipes are assembled in advance using support members (struts), and this assembly is supported by the mold via the struts using magnets embedded in the mold or by the elastic force of the assembly. A hollow piston is manufactured by casting the pipe.
（発明が解決しようとする問題点）
しかしながら、上記パイプを鋳ぐるむ方法を中空アルミ
ホイールの製造に利用しようとした場合、温度上昇によ
る磁石の減磁あるいは弾性力のバラツキ等により該−組
立体を金型に安定的に支持するのが困難であるばかりか
、支持部材がそのま〜ホイール内に残り、その分電量が
嵩んで思うように軽量化できないという問題を生じる。(Problems to be Solved by the Invention) However, when attempting to use the method of casting a pipe in the production of hollow aluminum wheels, the assembly may be damaged due to demagnetization of the magnet due to temperature rise or variations in elastic force. Not only is it difficult to stably support the support member in the mold, but the support member remains in the wheel as it is, causing the problem that the amount of electricity distributed is large and the weight cannot be reduced as desired.
本発明は、上記背景に鑑みてなされたもので、消失模型
を利用することにより容易かつ確実に中空化できる中空
アルミホイールの製造方法を提供することを目的とする
。The present invention has been made in view of the above background, and an object of the present invention is to provide a method for manufacturing a hollow aluminum wheel that can be hollowed easily and reliably by using a vanishing model.
なお、消失模型を用いる鋳造方法として特開昭６０−１
７０５５４号公報、特開昭ｅｌ−１１５８８０号公報等
に示されたものがあるが、何れもフルモールドとしての
利用の域を出ず、本発明とは直接的関係は有しない。In addition, as a casting method using a vanishing model, JP-A-60-1
Although there are those disclosed in Japanese Patent Application Laid-open No. 70554 and Japanese Patent Application Laid-Open No. 115880, they are only used as full molds and have no direct relation to the present invention.
（問題点を解決するための手段）
本発明は、樹脂発泡体に耐火物のスラリーをコーティン
グして成る模型を、消失性支持部材で支持しつ一鋳型内
に納め、溶湯を鋳込んで前記樹脂発泡体および前記支持
部材を消失させることを特徴とする。(Means for Solving the Problems) The present invention provides a model made of a resin foam coated with refractory slurry, supported by a fugitive support member, placed in a mold, and molten metal poured into the mold. The method is characterized in that the resin foam and the supporting member disappear.
本発明において、上記樹脂発泡体としては、消失模型と
して汎用的に用いられている材料、例えば発泡ポリスチ
レン、発泡ポリエチレン、発泡ポリプロピレン等を選択
することができる。またこの樹脂発泡体にコーティング
するスラリーとしては、耐火性を有しかつ緻密性を有す
るものであれば特にその種類を限定するものでなく１例
えばコロイダルシリカにジルコン粉末を混合したものを
用いることができる。このスラリーのコーティング厚さ
としては、０．５〜１．０ ｍｍとするのが望ましい。In the present invention, the resin foam may be selected from materials commonly used as vanishing models, such as foamed polystyrene, foamed polyethylene, and foamed polypropylene. The slurry to be coated on this resin foam is not particularly limited in type as long as it has fire resistance and density; for example, a mixture of colloidal silica and zircon powder can be used. can. The coating thickness of this slurry is preferably 0.5 to 1.0 mm.
これは、厚すぎると重量増加につながり、逆に薄すぎる
と殻としての形状維持が困難となるばかりか、ガス圧に
よって破損して中空化が困難になる理由による。また上
記消失性支持部材としては、樹脂発泡体と同材料を用い
ることができる。この支持部材は予め上記模型に部分的
に接合するか、該模型の全体を覆う態様とすることがで
きる。模型の全体を覆う場合には、発泡成形型により該
模型を鋳ぐるむようにすれば良い。This is because if it is too thick, it will lead to an increase in weight, and if it is too thin, it will not only be difficult to maintain its shape as a shell, but it will also be damaged by gas pressure, making it difficult to make it hollow. Moreover, the same material as the resin foam can be used as the above-mentioned fugitive support member. This support member may be partially joined to the model in advance, or may cover the entire model. When covering the entire model, the model may be covered with a foam mold.
（作用）
上記構成の中空アルミホイールの製造において、模型は
鋳型内の所定の部位に消失性支持部材により安定的に支
持される。モして溶湯を鋳込むと、該支持部材が消失し
て該模型は鋳ぐるまれ、これと同時に該模型内の発泡体
が消失してコーティング層が殻としてそのま一内部に残
り完全中空部が形成される。なお発泡体のガス化による
ガスは前記殻内に閉じ込められる。(Function) In manufacturing the hollow aluminum wheel having the above structure, the model is stably supported at a predetermined location within the mold by the fugitive support member. When molten metal is poured into the mold, the support member disappears and the model is cast, and at the same time, the foam inside the model disappears, leaving the coating layer as a shell inside the completely hollow part. is formed. Note that gas due to gasification of the foam is trapped within the shell.
（実施例） ′
以下、本発明の実施例を添付図面にもとづいて説明する
。なお本実施例は、自動車用アルミホイール（ｆ３ＪＪ
Ｘ１５）に適用したものである。(Example) ' Hereinafter, an example of the present invention will be described based on the accompanying drawings. In this example, aluminum wheels for automobiles (f3JJ
This is applied to X15).
本アルミホイールを製造するに際しては、予め第２図（
ａ） 、（ｂ）に示すごとき舵輪状の模型１を用意する
。この模型１は、同心に配された外リング部２および内
リング部３と前記外・内リング部２．３を結ぶ４木のス
ポーク部４とを有するように一体発泡成形された樹脂発
泡体の表面に、耐火物のスラリーをコーティングして成
つており、その外リング部２、スポーク部４および内リ
ング部３には、複数の支持部材５，５・・・が突設され
ている。支持部材５は、前記樹脂発泡体にスラリーをコ
ーティングした後、コーティング層が乾燥する前に、接
着して設けたものである。こ〜で、前記樹脂発泡体と支
持部材５とは発泡ポリプロピレンから成り、またスラリ
ーはコロイダルシリカにジルコン粉末を混合したもので
ある。またスラリーのコーティング厚さは０．８〜１．
Ｏｍｍとされている。When manufacturing this aluminum wheel, please prepare it in advance as shown in Figure 2 (
A steering wheel-shaped model 1 as shown in a) and (b) is prepared. This model 1 is made of resin foam integrally formed to have an outer ring part 2 and an inner ring part 3 arranged concentrically, and four wooden spoke parts 4 connecting the outer and inner ring parts 2.3. The outer ring portion 2, spoke portions 4, and inner ring portion 3 are provided with a plurality of supporting members 5, 5, . The support member 5 is provided by coating the resin foam with slurry and then adhering it before the coating layer dries. Here, the resin foam and the support member 5 are made of foamed polypropylene, and the slurry is a mixture of colloidal silica and zircon powder. The coating thickness of the slurry is 0.8 to 1.
It is said to be Omm.
そして、上記のように用意した模型１を、第１図に示す
ように、上型１１と下型１２と横型１３，１４とから成
る低圧鋳造用金型１０のキャビティ１５内に納める。こ
の納めに際しては、先ず型開き状態で該模型１を下型１
１上に載置し、続いて横型１３．１４をスライドさせ、
さらに上型１１を下降させて型を閉じる。この型閉じに
よって、複数の支持部材５が金型の所定部位に当接し、
該模型ｌはキャビティ１５内に浮いた状態で支持される
。次ニ、所定の加圧力（０，１〜０．９ｋｇ／ｃｍ”
）で湯口１６を通じてキャビティ１５内に溶湯（こ〜で
は、ＪＩＳ ＡＣ４ＣＭ ）を鋳込む。溶湯は、模型１
の下側より充填され、充填完了と同時に凝固し始め、こ
の間支持部材５が消失して該模型１は鋳ぐるまれた状態
となる。しかして前記支持部材５の消失と同時に、模型
１を構成する樹脂発泡体も消失し、内部にはスラリーの
コーティング層が殻として残る。なおこの殻内には前記
樹脂発泡体がガス化したガスが閉じ込められる。Then, the model 1 prepared as described above is placed in the cavity 15 of a low-pressure casting mold 10 consisting of an upper mold 11, a lower mold 12, and horizontal molds 13 and 14, as shown in FIG. When this is done, first place the model 1 into the lower mold 1 with the mold open.
1, then slide the horizontal type 13 and 14,
Further, the upper mold 11 is lowered to close the mold. By closing the mold, the plurality of supporting members 5 come into contact with predetermined parts of the mold,
The model l is supported in a floating state within the cavity 15. Second, the specified pressure (0.1 to 0.9 kg/cm"
) is used to pour molten metal (in this case, JIS AC4CM) into the cavity 15 through the sprue 16. The molten metal is model 1
It is filled from the bottom and begins to solidify as soon as the filling is completed, during which time the support member 5 disappears and the model 1 becomes cast. At the same time as the supporting member 5 disappears, the resin foam forming the model 1 also disappears, and a slurry coating layer remains inside as a shell. Note that the gas that has been gasified by the resin foam is trapped within this shell.
第３図（ａ）、（ｂ）は、上記のように製造したアルミ
ホイールを示したもので、その内部には完全密閉された
中空部１７が形成されるようになる。FIGS. 3(a) and 3(b) show an aluminum wheel manufactured as described above, in which a completely sealed hollow portion 17 is formed.
こ＼で、上記のようにして得たアルミホイールに熱処理
を施し、機械加工により仕上げた後、１９５／ｆ３０
）ＩＲ１５サイズのタイヤを実装し、これを ＪＡＳＯ
８０８−７５に規定する落錘衝撃試験に供した。なお比
較のため、上記実施例と同一の材料により中実のアルミ
ホイールを製造し、上記実施例と同一の処理を施して、
これも同様の落錘衝撃試験に供した。結果を第４図と第
５図に示す、これよりリムビード亀裂長さ、リムフラン
ジ変形量共に、各落錘高さに対して本実施例品の方が比
較量に比して小さい値となり、本発明の方法により得た
アルミホイールの剛性に優れていることが明らかとなっ
た。これは中空部１７が完全に閉じられているためと推
定される。Here, the aluminum wheel obtained as described above was heat treated and finished by machining, then it was made into a 195/f30
) IR15 size tire is installed and this is JASO
It was subjected to a falling weight impact test specified in 808-75. For comparison, a solid aluminum wheel was manufactured from the same material as in the above example, and subjected to the same treatment as in the above example.
This was also subjected to the same falling weight impact test. The results are shown in Figures 4 and 5. From these results, both the rim bead crack length and the rim flange deformation amount are smaller for the product of this example than for the comparison for each falling weight height. It has become clear that the aluminum wheel obtained by the method of the present invention has excellent rigidity. This is presumed to be because the hollow portion 17 is completely closed.
また、上記実施例量と比較量とで重量比較を行なったと
ころ、比較量が１０．２ ｋｇであるのに対し、本実施
例品は８．０ ｋｇであり、約２０％軽量化されている
ことが分った。In addition, when we compared the weight between the example amount and the comparative amount, the comparative amount was 10.2 kg, while the present example product was 8.0 kg, which is about 20% lighter. I found out that there is.
なお上記実施例では、模型ｌに対して支持部材５を部分
的に設けたが、これに代え、第６図と第７図に示すよう
に、該模型１の全体を支持部材２１で覆うようにしても
良い、この場合、発泡成形型を用いて樹脂を発泡させ、
予め模型１を支持部材２１で鋳ぐるんで複合模型２２と
しく第７図）、この複合模型２２を金型２０内に納める
ようにする（第６図）。これにより、模型１の金型内へ
の支持が確実となり、密閉中空部を有するアルミホイー
ルの製造がより容易となる。In the above embodiment, the support member 5 is partially provided for the model 1, but instead of this, as shown in FIGS. 6 and 7, the entire model 1 is covered with the support member 21. In this case, the resin is foamed using a foam mold,
The model 1 is cast in advance with a support member 21 to form a composite model 22 (FIG. 7), and this composite model 22 is placed in the mold 20 (FIG. 6). This ensures that the model 1 is supported within the mold, making it easier to manufacture an aluminum wheel having a sealed hollow portion.
また上記実施例では、模型１をスポーク部４を有する形
状としたが、このスポーク部４を省略して外リング２と
内リング部３とのみを有する形状としても良い、この場
合スポーク部と同様の態様で、外・内リング部２．３を
消失性支持部材５で連結する。Further, in the above embodiment, the model 1 has a shape having spoke parts 4, but it may also be shaped to omit this spoke part 4 and have only an outer ring 2 and an inner ring part 3. In this case, the model 1 is similar to the spoke parts. In this manner, the outer and inner ring parts 2.3 are connected by the fugitive support member 5.
さらに上記実施例において、低圧鋳造法を用いたが、本
発明は鋳造法を限定するものでなく、砂型鋳造法、金型
重力鋳造法、高圧鋳造法等を用いることができる。Further, in the above embodiments, a low-pressure casting method was used, but the present invention is not limited to the casting method, and sand mold casting, mold gravity casting, high-pressure casting, etc. can be used.
（発明の効果）
以上、詳細に説明したように、本発明にか−る中空アル
ミホイールの製造方法は、樹脂発泡体に耐火物のスラリ
ーをコーティングして成る模型を、消失性支持部材で支
持しつ一鋳型内に納めるようにしたので、樹脂発泡体お
よび支持部材の消失により容易に密閉状態の中空部を形
成することができ、より軽量で強度の大きいアルミホイ
ールを製造できる効果がある。(Effects of the Invention) As described above in detail, the method for manufacturing a hollow aluminum wheel according to the present invention is to support a model made of a resin foam coated with a refractory slurry using a fugitive support member. Since it is housed in a single mold, it is possible to easily form a sealed hollow part by eliminating the resin foam and the supporting member, which has the effect of producing a lighter and stronger aluminum wheel.
第１図は本発明にか−る中空アルミホイールの製造の一
実施例を示す断面図、第２図（ａ）、（ｂ）は前記実施
例で用いる模型を示したもので、（ａ）は平面図、（ｂ
）は（ａ）のｎ−ｎ矢視断面図、第３図（ａ）、（ｂ）
は本発明の方法で得た中空アルミホイールを示したもの
で、（ａ）は平面図、（ｂ）は（ａ）のｍ−ｍ矢視断面
図、第４図と第５図は本発明の方法で得た中空アルミホ
イールの落錘衝撃試験結果を示すグラフ、第６図は本発
明の他の実施例を示す断面図、第７図は前記能の実施例
で用いる複合模型の平面図である。
１ ・・・ 模型
５．２１ ・・・ 支持部材
１０ ・・・ 金型
特許出願人 トヨタ自動車株式会社
菖１ 区
第２図
第３ 図
（ｂ）
第４図
第５図
洛な！□治下高で（ｉｎ）
第６ 図
第７図FIG. 1 is a cross-sectional view showing an example of manufacturing a hollow aluminum wheel according to the present invention, and FIGS. 2(a) and (b) are models used in the above example. (a) is a plan view, (b
) is a sectional view taken along the nn arrow in (a), and Figures 3 (a) and (b)
4 shows a hollow aluminum wheel obtained by the method of the present invention, (a) is a plan view, (b) is a sectional view taken along the mm-m arrow in (a), and FIGS. A graph showing the results of a falling weight impact test on a hollow aluminum wheel obtained by the above method, FIG. 6 is a cross-sectional view showing another embodiment of the present invention, and FIG. 7 is a plan view of a composite model used in the above-mentioned Noh embodiment. It is. 1 ... Model 5.21 ... Supporting member 10 ... Mold patent applicant Toyota Motor Corporation Iris 1 Ward Figure 2 Figure 3 (b) Figure 4 Figure 5 Rakuna! □At Jige High School (in) Figure 6 Figure 7
Claims (1)
て成る模型を、消失性支持部材で支持しつゝ鋳型内に納
め、溶湯を鋳込んで前記樹脂発泡体および前記支持部材
を消失させることを特徴とする中空アルミホィールの製
造方法。(1) A model made of a resin foam coated with refractory slurry is placed in a mold while being supported by a fugitive support member, and molten metal is poured into the mold to cause the resin foam and the support member to disappear. A method for manufacturing a hollow aluminum wheel characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30997387A JPH01150432A (en) | 1987-12-08 | 1987-12-08 | Manufacture of hollow aluminum wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30997387A JPH01150432A (en) | 1987-12-08 | 1987-12-08 | Manufacture of hollow aluminum wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01150432A true JPH01150432A (en) | 1989-06-13 |
Family
ID=17999594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30997387A Pending JPH01150432A (en) | 1987-12-08 | 1987-12-08 | Manufacture of hollow aluminum wheel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01150432A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105458168A (en) * | 2015-12-07 | 2016-04-06 | 兴化市雅兰机械制造有限公司 | Driving wheel lost foam casting technology |
| CN105458166A (en) * | 2014-09-12 | 2016-04-06 | 池州市永恒机械制造有限公司 | Lost foam manufacturing process method |
| CN107138693A (en) * | 2017-04-27 | 2017-09-08 | 柳州聚龙科技有限公司 | The method of wheel hub casting |
| CN107199318A (en) * | 2017-04-27 | 2017-09-26 | 柳州聚龙科技有限公司 | The manufacture method of automobile bearing casting |
-
1987
- 1987-12-08 JP JP30997387A patent/JPH01150432A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105458166A (en) * | 2014-09-12 | 2016-04-06 | 池州市永恒机械制造有限公司 | Lost foam manufacturing process method |
| CN105458168A (en) * | 2015-12-07 | 2016-04-06 | 兴化市雅兰机械制造有限公司 | Driving wheel lost foam casting technology |
| CN105458168B (en) * | 2015-12-07 | 2017-08-15 | 兴化市雅兰机械制造有限公司 | Driving wheel lost foam casting process |
| CN107138693A (en) * | 2017-04-27 | 2017-09-08 | 柳州聚龙科技有限公司 | The method of wheel hub casting |
| CN107199318A (en) * | 2017-04-27 | 2017-09-26 | 柳州聚龙科技有限公司 | The manufacture method of automobile bearing casting |
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