JP2003010945A - Device of casting wheel for automobile - Google Patents
Device of casting wheel for automobileInfo
- Publication number
- JP2003010945A JP2003010945A JP2001191913A JP2001191913A JP2003010945A JP 2003010945 A JP2003010945 A JP 2003010945A JP 2001191913 A JP2001191913 A JP 2001191913A JP 2001191913 A JP2001191913 A JP 2001191913A JP 2003010945 A JP2003010945 A JP 2003010945A
- Authority
- JP
- Japan
- Prior art keywords
- cooling
- thermal expansion
- insert
- cooling part
- thin
- 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.)
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Links
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- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、自動車用ホイール
の成形に用いられる鋳造装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a casting device used for molding automobile wheels.
【0002】[0002]
【従来の技術】鋳型のキャビティに溶湯を流し込んで自
動車用ホイールを鋳造する工程にあって、ハブ部となる
ホイールの中心を湯口とし、キャビティのスポーク部成
形湯路からリム部成形湯路へ溶湯が注入され、リム部成
形湯路の最奥端まで完全に充填注入した後に、冷却工程
に移行し、該リム部成形湯路の端縁からスポーク部成形
湯路を経て湯口に至るまで徐々に凝固形成することによ
り自動車用ホイールが製造される。2. Description of the Related Art In the process of casting a wheel for an automobile by pouring the molten metal into a cavity of a mold, the center of the wheel serving as a hub is used as a sprue, and the molten metal is transferred from the spoke forming channel of the cavity to the rim forming channel. Is completely injected into the rim forming runner, and then the cooling process is started, and the rim forming runner gradually moves from the edge of the rim forming runner to the spout forming runner to the sprue. An automobile wheel is manufactured by solidifying and forming.
【0003】このような冷却工程にあって、キャビティ
内に注入された溶湯を冷却する際の凝固が不適正である
と、気泡巣、引け巣、割れ、表面欠陥、形状不良等が発
生しやすくなるため、溶湯の冷却を適正に行うことによ
って、該不良等の無い健全な製品が製造できることとな
る。また、溶湯が凝固する際に起こる熱収縮に対し、溶
湯を随時補充することにより所定の形状が形成され得る
ため、冷却工程での凝固と溶湯の補充が適正に行われる
ような冷却手段を用いることが、健全な製品を効率良く
得る重要なポイントとなる。In such a cooling process, if the molten metal injected into the cavity is improperly solidified when it is cooled, bubble cavities, shrinkage cavities, cracks, surface defects, shape defects and the like are likely to occur. Therefore, by properly cooling the molten metal, it is possible to manufacture a sound product free from the defects. In addition, since a predetermined shape can be formed by replenishing the molten metal at any time with respect to heat shrinkage that occurs when the molten metal solidifies, a cooling means is used that appropriately solidifies and replenishes the molten metal in the cooling step. That is an important point for efficiently obtaining healthy products.
【0004】[0004]
【発明が解決しようとする課題】自動車用ホイールは、
複雑な形状を有することから、各部位の肉厚等が異なる
ため、冷却時における各部位毎の凝固の進行度が異な
り、上記のような欠陥等の不良を生じやすい傾向があ
る。そのため、冷却工程の際に相対的に高温領域である
湯口付近を積極的に冷却し、リム部最端部の凝固開始か
ら全域での凝固終了までの時間を短時間にすることによ
って、ホイール全体の凝固がリム部最端部から湯口に向
かって順次進行していく状況をつくり出し、健全な製品
を製造していることが一般的である。DISCLOSURE OF INVENTION Problems to be Solved by the Invention
Since it has a complicated shape, the wall thickness and the like of each portion are different, so that the progress of solidification is different for each portion during cooling, which tends to cause defects such as the above defects. Therefore, during the cooling process, the vicinity of the sprue, which is a relatively high temperature region, is positively cooled, and the time from the start of solidification at the end of the rim to the end of solidification in the entire region is shortened, so that the entire wheel is It is common to produce a sound product by creating a situation in which the solidification of the slag gradually progresses from the end of the rim toward the sprue.
【0005】上記の自動車用ホイールとしては、薄肉の
スポークが接合するハブ部が製品の性質上高い機械的強
さを必要とされる部分であるため、厚肉形状を有してい
ることが一般的である。そのため、該ハブ部に対する冷
却作用を高めることにより、該ハブ部の凝固が周囲の各
部位の凝固に対して適正に行われるようにする必要があ
る。このための冷却方法として、従来は、入子に冷却流
体を注入する通路を設け、該通路を冷却作用の最も必要
とする部分では冷却流体の流量が多くなる等の構成とす
るか、又は、冷却部体を別途設け、該冷却部体を入子の
所定箇所に設置する構成が一般的であった。ところが、
前者では入子に穴を開ける等して通路を設けることにな
るため、入子の耐久性の低下と、通路を加工するための
費用が増大する等が生ずる。また、後者では入子と冷却
部体間での熱膨張収縮変形による悪影響を避けるため、
入子と冷却部体の接触面を平面当てする必要があり、局
部的に冷却作用を高めることが難しかった。本発明はか
かる問題点を解決することを目的とするものである。In the above-mentioned automobile wheel, since the hub portion to which the thin spokes are joined is a portion requiring high mechanical strength due to the property of the product, it generally has a thick shape. Target. Therefore, it is necessary to enhance the cooling effect on the hub portion so that the solidification of the hub portion can be appropriately performed with respect to the solidification of the surrounding parts. As a cooling method for this purpose, conventionally, a passage is provided for injecting a cooling fluid into the insert, and the passage has a structure in which the flow rate of the cooling fluid is increased in a portion where the cooling action is most necessary, or In general, a cooling unit is separately provided and the cooling unit is installed at a predetermined position of the insert. However,
In the former case, since the passage is provided by making a hole in the insert, the durability of the insert is reduced, and the cost for processing the passage increases. Further, in the latter case, in order to avoid adverse effects due to thermal expansion contraction deformation between the insert and the cooling unit,
It was necessary to flatten the contact surface between the insert and the cooling unit, and it was difficult to locally enhance the cooling action. The present invention aims to solve such problems.
【0006】[0006]
【課題を解決するための手段】本発明は、自動車用ホイ
ールの鋳造装置として、スポーク部成形湯路の湯口側に
薄肉部を形成して、該スポーク部成形湯路と対向する面
を薄肉側部分平面とし、さらに該薄肉部を除いた厚肉部
のスポーク部成形湯路と対向する面を厚肉側主平面とし
てなる自動車用ホイール鋳型のキャビティーを画成する
入子と、厚肉側主平面に接触する全体冷却部と、薄肉側
部分平面に接触するポイント冷却部とを具備する冷却部
体とを備え、ポイント冷却部と薄肉側部分平面との間又
は/及び全体冷却部と厚肉側主平面との間に熱膨張収縮
緩衝材を介装したことを特徴とする。SUMMARY OF THE INVENTION The present invention is a casting device for an automobile wheel, in which a thin portion is formed on the sprue forming runway at the sprue side, and the surface facing the spoke portion forming runway is provided on the thin side. An insert forming a cavity of an automobile wheel mold having a partial flat surface, and a surface of the thick wall portion excluding the thin wall portion, which faces the spoke part forming runway, being a thick wall side main surface, and a thick wall side. A cooling part body comprising an entire cooling part in contact with the main plane and a point cooling part in contact with the thin side partial plane, and between the point cooling part and the thin side partial plane or / and the entire cooling part and the thickness. It is characterized in that a thermal expansion / shrinkage buffer material is interposed between the meat side main plane.
【0007】このように、自動車用ホイール鋳型の入子
として、スポーク部成形湯路の湯口側に形成した薄肉部
と、該薄肉部以外の厚肉部にそれぞれ冷却部体を接触さ
せることによって、全体冷却部により自動車用ホイール
の冷却速度を全体的に高めつつ、ポイント冷却部により
該冷却速度に合わせてスポークが接合するハブ部を局部
的に強制冷却することができるため、全体として、適正
な冷却作用を生じさせることができ、溶湯の凝固がリム
部最端部より湯口に向かって可及的に順次進行し得るこ
ととなり、健全な製品を効率的に製造できることとな
る。As described above, as a nest of a wheel mold for an automobile, a cooling portion is brought into contact with a thin portion formed on a sprue side of a spoke forming passage and a thick portion other than the thin portion, respectively. While the overall cooling unit can increase the cooling speed of the automobile wheel as a whole, the point cooling unit can locally and forcibly cool the hub portion to which the spokes are joined in accordance with the cooling speed. A cooling action can be generated, and the solidification of the molten metal can proceed from the outermost end of the rim portion toward the sprue as sequentially as possible, so that a sound product can be efficiently manufactured.
【0008】上述の冷却部体として、ポイント冷却部と
全体冷却部からなる段付き構成であり、該ポイント冷却
部はスポークがハブ部に接合する部分を局部的に冷却す
ることが主要目的であるため、自動車用ホイールのスポ
ーク部が接合するハブ部に対応する位置にのみ設置して
も良し、ハブ円周の全域にわたって設置しても良い。一
方、全体冷却部は、ホイールの全周にわたって構成する
ようにしても良いし、上記ポイント冷却部の設置位置と
対応して複数の冷却部体を構成するようにしても良い。The above cooling unit has a stepped structure consisting of a point cooling unit and an entire cooling unit, and the main purpose of the point cooling unit is to locally cool the portion where the spokes are joined to the hub portion. Therefore, it may be installed only at a position corresponding to the hub part where the spoke parts of the automobile wheel are joined, or may be installed over the entire circumference of the hub circumference. On the other hand, the overall cooling unit may be configured over the entire circumference of the wheel, or a plurality of cooling unit bodies may be configured corresponding to the installation position of the point cooling unit.
【0009】このような冷却部体の冷却方法としては、
一般的な水冷又は、空冷等を用いることができ、冷却流
体が流れる流路を冷却部体に設けて、該流路に冷却流体
が注入されることによって冷却が行われるようにするこ
とができる。このような冷却流体の流路は、ポイント冷
却部と全体冷却部のそれぞれに設けることもでき、これ
によりポイント冷却部の冷却作用を一層高めることがで
きる。As a cooling method for such a cooling unit,
General water cooling, air cooling, or the like can be used, and it is possible to provide a flow path through which the cooling fluid flows in the cooling section body and perform cooling by injecting the cooling fluid into the flow path. . Such a cooling fluid flow path can be provided in each of the point cooling unit and the entire cooling unit, and thus the cooling action of the point cooling unit can be further enhanced.
【0010】本発明にかかる冷却部体によって冷却され
る入子として、ポイント冷却部と全体冷却部から適正な
冷却作用を得るため、入子に薄肉側部分平面と厚肉側主
平面とを形成し、接触面が均一に冷却されるように入子
と冷却部体の各接触面が平面接触する構成としている。As a nest cooled by the cooling unit according to the present invention, a thin side partial plane surface and a thick side main plane surface are formed in the nest in order to obtain a proper cooling action from the point cooling section and the whole cooling section. However, the contact surfaces of the insert and the cooling member are in plane contact so that the contact surfaces are cooled uniformly.
【0011】このような入子に構成された薄肉側部分平
面の薄肉部の厚さとしては、冷却する自動車用ホイール
の形状や材質等によって、適切な形状を成すようにする
ことができる。The thickness of the thin portion of the flat surface on the side of the thin portion formed in such a nest can be set to an appropriate shape depending on the shape and material of the automobile wheel to be cooled.
【0012】一方、上述した鋳造装置の冷却工程にあっ
ては、入子の温度が400℃〜500℃程度になるのに
対し、冷却部体は約100℃とするため、それぞれの熱
伝導によって熱膨張収縮変化が該入子と冷却部体に発生
し、ポイント冷却部と薄肉側部分平面との接触面、及び
全体冷却部と厚肉側主平面との接触面において、圧縮負
荷が作用したり、接触面が離れること等が起こり得る。
そのため、熱膨張収縮変形を見越して逃がし空間を設け
る図5のような構成(公知例ではない)も考えられた
が、全体冷却部と厚肉側主平面との間に予め設けた逃が
し空間では、空気の熱伝導率が低いために冷却作用が不
十分となり、必要な冷却効果を得ることができない。そ
こで発明者はさらに鋭意研鑽を続けた結果、ポイント冷
却部と薄肉側部分平面との間又は/及び全体冷却部と厚
肉側主平面との間に、上記の熱膨張収縮変形を吸収し得
る熱膨張収縮緩衝材を介装するに至った。このように熱
膨張収縮緩衝材を使用することによって、熱膨張収縮変
形によって冷却部体と入子の間に負荷がかかったり、空
間ができたりすること等を防止でき、かつ十分な冷却効
果が発揮されることとなった。On the other hand, in the above-described cooling process of the casting apparatus, the temperature of the insert is about 400 ° C. to 500 ° C., while the cooling body is about 100 ° C. A change in thermal expansion and contraction occurs in the insert and the cooling section body, and a compressive load acts on the contact surface between the point cooling section and the thin-side partial plane and the contact surface between the entire cooling section and the thick-side main plane. Or the contact surface may be separated.
Therefore, a configuration (not a known example) in which an escape space is provided in anticipation of thermal expansion / contraction deformation is also considered, but in an escape space provided in advance between the entire cooling part and the thick side main plane. Since the thermal conductivity of air is low, the cooling effect becomes insufficient, and the required cooling effect cannot be obtained. Therefore, as a result of further intensive study, the inventor can absorb the above thermal expansion / contraction shrinkage deformation between the point cooling part and the thin side partial plane or / and between the entire cooling part and the thick side main plane. It came to interpose a thermal expansion / shrinkage buffer material. By using the thermal expansion / shrinkage cushioning material in this way, it is possible to prevent a load from being applied between the cooling section body and the insert due to thermal expansion / contraction deformation, or to create a space, and to provide a sufficient cooling effect. It was to be demonstrated.
【0013】入子や冷却部体の形状、入子と冷却部体の
温度差等が熱膨張収縮変形に影響を及ぼすことから、上
記した熱膨張収縮部材を介在させる接触面としては、ポ
イント冷却部と薄肉側部分平面との接触面に発生する熱
膨張収縮変形と、全体冷却部と厚肉側主平面との接触面
に発生する熱膨張収縮変形を比較し、変形量がより大き
く発生する方の接触面に、熱膨張収縮緩衝材を介装させ
ることが効果的である。また、変形量や変形作用によっ
ては両接触面に熱膨張収縮緩衝材を介装させても良い。Since the shape of the insert and the cooling part and the temperature difference between the insert and the cooling part affect the thermal expansion and contraction deformation, the point contact cooling is used as the contact surface for interposing the thermal expansion and contraction member. Expansion and contraction deformation that occurs on the contact surface between the cooling section and the thin side partial flat surface is compared with the thermal expansion and contraction deformation that occurs on the contact surface between the entire cooling section and the thick side main surface, and a larger amount of deformation occurs It is effective to interpose a thermal expansion / shrinkage buffer material on the other contact surface. Further, a thermal expansion / shrinkage buffer material may be provided on both contact surfaces depending on the deformation amount and the deformation action.
【0014】上記の熱膨張緩衝材としては、冷却部体か
らの冷却作用を充分伝達できることが求められるため、
熱伝導率の高い材料を使用することが提案される。ま
た、該熱膨張収縮緩衝材を弾力性の高い弾性体とするこ
とにより、入子や冷却部体が熱膨張収縮変形しても両者
が該熱膨張収縮緩衝材を介して常に接触しているため、
熱伝導を充分行うことができる。加えて、鋳造時に入子
が持つ温度域において、充分な耐熱性を持つ材料が好ま
しい。さらには、入子や冷却部体よりも熱膨張率が高い
材料を用いても良い。Since the above-mentioned thermal expansion cushioning material is required to be able to sufficiently transmit the cooling action from the cooling part,
It is proposed to use materials with high thermal conductivity. Further, by making the thermal expansion / contraction cushioning material an elastic body having a high elasticity, both are constantly in contact through the thermal expansion / contraction cushioning material even if the insert or the cooling member is deformed by thermal expansion / contraction. For,
Heat conduction can be sufficiently performed. In addition, a material having sufficient heat resistance in the temperature range of the insert during casting is preferable. Further, a material having a higher coefficient of thermal expansion than the insert and the cooling unit may be used.
【0015】このような熱膨張収縮材料としては、銅や
グラファイト等の炭素材料等を用いることができる。な
かでも、高熱伝導率、高弾力性、耐熱性に優れるグラフ
ァイトをシート状にしたグラファイト製シート部材や、
炭素繊維の短繊維からなる炭素繊維不織布等を使用する
ことが提案される。特にグラファイト製シート部材は、
圧縮した際の復元率も高いことから、繰り返し使用に対
する耐久性も高い。As such a thermal expansion / contraction material, a carbon material such as copper or graphite can be used. Above all, a graphite sheet member made of graphite, which has high thermal conductivity, high elasticity, and heat resistance, and
It is proposed to use a carbon fiber non-woven fabric composed of short carbon fibers. In particular, the graphite sheet member
Since the restoration rate when compressed is also high, the durability against repeated use is also high.
【0016】上記の熱膨張収縮緩衝材として、該材質の
厚みは一般的に熱伝導率と反比例することから熱伝導性
の面から薄い方が好ましい。一方、入子と冷却部体の熱
膨張収縮変形量を補助でき得るだけの厚みも必要となる
ため、入子や冷却部体の形状と、両者の最大温度差を考
慮して適切な厚みを決定する必要がある。As the above-mentioned thermal expansion / shrinkage buffer material, the thickness of the material is generally inversely proportional to the thermal conductivity, so that it is preferable that it is thin from the viewpoint of thermal conductivity. On the other hand, it is necessary to have a thickness that can support the amount of thermal expansion / contraction deformation of the insert and the cooling unit, so an appropriate thickness is considered in consideration of the shapes of the insert and the cooling unit and the maximum temperature difference between the insert and the cooling unit. Need to decide.
【0017】[0017]
【発明の実施の形態】本発明の実施例を図面に従って説
明する。図1は、自動車用ホイールを成形する鋳造型の
金型1である。上型2と下型3と横型4,4とを組み合
わせることによって、キャビティ5が形成される。該キ
ャビティ5はハブ部54とスポーク部52とリム部53
とから構成され、ストーク6から、溶湯注入路7を通し
て湯口51より溶湯が注入されて、ハブ部54からスポ
ーク部52、リム部53の湯路を通過して、溶湯が充填
される。下型基部に組み付けられて下型3を形成する入
子8に、冷却部体9が設置され、この冷却部体9の冷却
作用等によって溶湯が凝固して自動車用ホイールが製造
される。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a casting mold 1 for molding an automobile wheel. The cavity 5 is formed by combining the upper mold 2, the lower mold 3, and the horizontal molds 4 and 4. The cavity 5 includes a hub portion 54, a spoke portion 52, and a rim portion 53.
The molten metal is injected from the stalk 6 through the molten metal injection passage 7 through the molten metal inlet 51, passes through the molten metal passage of the hub portion 54, the spoke portion 52, and the rim portion 53, and is filled with the molten metal. A cooling unit 9 is installed on the insert 8 that is assembled to the lower mold base to form the lower mold 3, and the molten metal is solidified by the cooling action of the cooling unit 9 or the like to manufacture an automobile wheel.
【0018】図2は、上記金型1の入子8aと冷却部体
9aの拡大図である。入子8aには、湯口51とスポー
ク部52間のハブ部54を局所的に冷却できる場所とし
て薄肉部10が形成され、該薄肉部以外には厚肉部12
が形成されている。該薄肉部10の薄肉側部分平面11
には、熱膨張収縮緩衝材13を介して冷却部体9aのポ
イント冷却部14aが圧接されている。また、前記厚肉
部12の厚肉側主平面15aには冷却部体9aの全体冷
却部16aが接している。ここで熱膨張収縮緩衝材13
として、グラファイト製シート部材を用いている。FIG. 2 is an enlarged view of the insert 8a of the mold 1 and the cooling body 9a. The thin portion 10 is formed on the insert 8a as a place where the hub portion 54 between the sprue 51 and the spoke portion 52 can be locally cooled, and the thick portion 12 other than the thin portion 12 is formed.
Are formed. Partial plane 11 on the thin side of the thin portion 10
The point cooling unit 14a of the cooling unit body 9a is pressed against the thermal expansion and contraction cushioning material 13 via the thermal expansion and contraction cushioning member 13. Further, the entire cooling portion 16a of the cooling portion body 9a is in contact with the thick side main plane 15a of the thick portion 12. Here, the thermal expansion / shrinkage buffer material 13
As the graphite sheet member,
【0019】上記熱膨張収縮緩衝材13は、入子8aの
厚肉側主平面15aと冷却部体9aの全体冷却部16a
との間に介在させるようにすることもでき、さらには、
薄肉側部分平面11aとポイント冷却部14aとの間
と、厚肉側主平面15aと冷却部体9aの全体冷却部1
6aとの間の両方に介在させるようにしても良い。The thermal expansion / shrinkage cushioning material 13 includes the thick side main plane 15a of the insert 8a and the entire cooling portion 16a of the cooling portion body 9a.
Can be intervened between
Between the thin-side partial flat surface 11a and the point cooling part 14a, and between the thick-side main flat surface 15a and the cooling part body 9a.
You may make it intervene both between 6a.
【0020】また、冷却部体9aには、冷却水を流すた
めの流路17aが設けられ、所定の冷却時に流路17a
に冷却水を流すことによって冷却部体9aに冷却作用を
発生させる。また、流路17aには冷却用エア等他の冷
却流体を使用することもできる。Further, the cooling part 9a is provided with a flow path 17a for flowing cooling water, and the flow path 17a is provided at a predetermined cooling time.
A cooling action is generated in the cooling unit 9a by flowing cooling water to the cooling unit 9a. Further, other cooling fluid such as cooling air can be used for the flow path 17a.
【0021】一方、図3のように、本発明にかかる冷却
部体9bと入子8bの形状も提案される。この図3の構
造では入子8bの薄肉部10が図2の構造に比べ広くな
っているため、薄肉側部分平面11bとポイント冷却部
14bの圧接面が広くなり、湯口51とスポーク部52
との間のハブ部54を冷却する効果が一層向上すること
となり得る。また、このような構造では、金型1を加工
する際において、入子8bの加工が比較的容易なことか
ら、金型加工コストの高騰を抑制することもできる。On the other hand, as shown in FIG. 3, the shapes of the cooling unit 9b and the insert 8b according to the present invention are also proposed. In the structure of FIG. 3, since the thin portion 10 of the insert 8b is wider than that of the structure of FIG. 2, the pressure contact surface between the thin-side partial flat surface 11b and the point cooling portion 14b is wide, and the gate 51 and the spoke portion 52 are wide.
The effect of cooling the hub portion 54 between and can be further improved. Further, in such a structure, when the die 1 is processed, the processing of the insert 8b is relatively easy, so that it is possible to suppress a rise in die processing cost.
【0022】次に本発明における鋳造工程を図1及び図
2を用いた具体例で説明する。自動車用ホイールの材料
として、例えばアルミニウム合金を溶解炉等によって熱
することで溶解し溶湯とする。700℃程度の高温にし
たアルミニウムの溶湯を、自動車用ホイール鋳造用金型
1の湯口51より注入する。該溶湯は、キャビティ5に
流入し、ハブ部54からスポーク部52を通過し、リム
部53に至り、リム部53の最端部より充填され、リム
部53の最端部に達した溶湯から次第に温度が低下し、
凝固の進行が開始していく。アルミニウム合金等の金属
材料は、一般的に冷却する際に熱収縮変形するため、ア
ルミニウム合金に割れや欠陥等が生じ易い。そのため、
湯口51から溶湯を所定の圧力で注入し、製品が所望の
形状を成すように溶湯を補充する。Next, the casting process in the present invention will be described with reference to a concrete example using FIGS. 1 and 2. As a material for automobile wheels, for example, an aluminum alloy is melted by heating in a melting furnace or the like to form a molten metal. The molten aluminum, which has been heated to a high temperature of about 700 ° C., is poured from the gate 51 of the automobile wheel casting mold 1. The molten metal flows into the cavity 5, passes through the spokes 52 from the hub 54, reaches the rim 53, is filled from the end of the rim 53, and reaches the end of the rim 53. The temperature gradually decreases,
The progress of coagulation begins. Generally, a metal material such as an aluminum alloy undergoes heat shrinkage deformation upon cooling, and thus cracks, defects, and the like are likely to occur in the aluminum alloy. for that reason,
The molten metal is injected from the gate 51 at a predetermined pressure, and the molten metal is replenished so that the product has a desired shape.
【0023】このように溶湯が流入されていくと、金型
は溶湯によって高温に熱せられ、特に入子8aの湯口5
1近傍では約400℃〜500℃の高温となる。この高
温になった入子8aを冷却するために、冷却部体9aで
は、全体冷却部16aが厚肉側主平面15aと接して入
子8a全体を冷却し、ポイント冷却部14aが熱膨張収
縮緩衝材13(グラファイト製シート部材)を介して薄
肉側部分平面11aと圧接して、湯口51とスポーク部
52のハブ部54を局部的に強制冷却するようにしてい
る。これにより、ホイール全体の冷却速度を高めなが
ら、薄肉の湯口51よりも厚肉のハブ部54を速く冷却
できるため、アルミニウム合金の溶湯の冷却としては、
リム部53の最端部より湯口51に向かって可及的に順
次凝固し得ることができることになる。そのため、アル
ミニウム合金の熱収縮に対し溶湯を補充しつつ、急速に
凝固を進行させることによって欠陥等のない健全な製品
を鋳造できうる。As the molten metal flows in in this way, the mold is heated to a high temperature by the molten metal, and in particular, the gate 5 of the insert 8a.
In the vicinity of 1, it becomes a high temperature of about 400 ° C to 500 ° C. In order to cool the insert 8a that has reached a high temperature, in the cooling part 9a, the entire cooling part 16a contacts the thick side main plane 15a to cool the entire insert 8a, and the point cooling part 14a expands and contracts by heat. The sprue 51 and the hub portion 54 of the spoke portion 52 are locally forcedly cooled by pressure contact with the thin-side partial flat surface 11a via the cushioning material 13 (graphite sheet member). This makes it possible to cool the thick hub portion 54 faster than the thin sprue 51 while increasing the cooling speed of the entire wheel.
As a result, it is possible to solidify from the outermost end of the rim portion 53 toward the sprue 51 as sequentially as possible. Therefore, it is possible to cast a sound product without defects by rapidly solidifying while replenishing the molten metal with respect to the heat shrinkage of the aluminum alloy.
【0024】また、上述のように厚肉であるハブ部54
を局部的に強制冷却することによって、厚み方向に生じ
る凝固進行度の内外差を小さくできるため、厚肉部を冷
却する際に発生し易い内部欠陥を防止する効果も得られ
ることとなる。Further, as described above, the hub portion 54 having a large wall thickness
By locally forcibly cooling, the internal / external difference in the degree of solidification that occurs in the thickness direction can be reduced, so that an effect of preventing internal defects that are likely to occur when the thick portion is cooled can also be obtained.
【0025】このような冷却工程では、冷却時に冷却部
体9aが約100℃に対し、入子8aの温度が約400
℃〜500℃になるため、両者間の熱伝導によって冷却
部体9aと入子8aが熱膨張収縮し、ポイント冷却部1
4aでは、熱収縮変形作用の違いから冷却部体9aの収
縮変形が大きくなる。これによる空間の発生を防ぐた
め、上述のような熱膨張収縮緩衝材13を介在してい
る。該熱膨張収縮緩衝材13は常温時において、入子8
aに冷却部体9aを圧接することにより圧縮変形状態と
なっているため、前記ポイント冷却部14の熱膨張収縮
変形によって入子8aと冷却部体9aが離れても、その
変形に従って該熱膨張収縮緩衝材13の圧縮変形が緩和
されるだけであり、入子8aと冷却部体9aの両者と接
触し続けることができるため、両者間での熱伝導を適正
に行い得る。In such a cooling process, the temperature of the cooling member 9a is about 100 ° C. and the temperature of the insert 8a is about 400 during cooling.
C. to 500.degree. C., the heat conduction between the two causes the cooling section body 9a and the insert 8a to expand and contract thermally, and the point cooling section 1
In 4a, the contraction deformation of the cooling unit 9a becomes large due to the difference in the heat contraction deformation action. In order to prevent the generation of space due to this, the thermal expansion / shrinkage cushioning material 13 as described above is interposed. The thermal expansion / shrinkage cushioning material 13 is used for the insert 8 at room temperature.
Since the cooling portion body 9a is in a compression deformation state by being pressed against a, even if the insert 8a and the cooling portion body 9a are separated due to the thermal expansion / contraction deformation of the point cooling portion 14, the thermal expansion is caused by the deformation. Only the compressive deformation of the shrinkage cushioning material 13 is alleviated, and the shrinkage cushioning material 13 can be kept in contact with both the insert 8a and the cooling section body 9a, so that heat conduction between them can be properly performed.
【0026】一方、図4(共通部分には同じ符号を用い
ている)に示すような従来例の冷却部体9’を備えた金
型1では、冷却部体9’の全体冷却部16’が厚肉側主
平面15’に接触しており、これにより入子8’を全体
的に冷却するようにしているため、相対的に薄肉形状で
あるスポーク部52や湯口51の冷却が速くなり、厚肉
形状であるハブ部54の冷却速度が前記スポーク部52
や湯口51端部に比べ鈍くなる。そのため、前記のよう
に湯口51が、ハブ部54より早く冷却されて凝固する
ことになり該ハブ部54に溶湯を補充することが困難に
なるため、熱収縮によって欠陥等が生じやすくなり、生
産効率が低下する原因となり得る。On the other hand, in the mold 1 having the conventional cooling section body 9'as shown in FIG. 4 (the same reference numerals are used for common parts), the entire cooling section 16 'of the cooling section body 9'is provided. Is in contact with the thick-walled main plane 15 ', thereby cooling the insert 8'as a whole, so that the spokes 52 and the sprue 51, which have a relatively thin shape, cool faster. The cooling rate of the hub portion 54 having a thick shape is the same as the spoke portion 52.
It becomes dull compared to the end of the gate 51. Therefore, as described above, the sprue 51 is cooled faster than the hub portion 54 and solidifies, and it becomes difficult to replenish the molten metal to the hub portion 54. Therefore, defects or the like are likely to occur due to heat shrinkage, and This can cause a decrease in efficiency.
【0027】さらに、図5(共通部分には同じ符号を用
いている)に示す比較例の冷却部体9”を備えた金型1
では、熱膨張収縮緩衝材13を入子8”の薄肉側部分平
面11”と、冷却部体9”のポイント冷却部14”との
間に使用していないため、入子8”と冷却部体9”との
熱伝導によっておこる熱膨張収縮変形を見越して、予め
逃がし空間18を厚肉側主平面15”と全体冷却部1
6”との間にに設けている。一般的に空気の熱伝導率は
低いことから、逃がし空間18の熱伝導が不十分とな
り、必要な冷却作用が得られないことになり得る。Further, a mold 1 provided with a cooling part body 9 "of a comparative example shown in FIG. 5 (the same reference numerals are used for common parts).
Since the thermal expansion / shrinkage cushioning material 13 is not used between the thin-side partial flat surface 11 ″ of the insert 8 ″ and the point cooling part 14 ″ of the cooling part 9 ″, the insert 8 ″ and the cooling part In anticipation of thermal expansion / contraction deformation caused by heat conduction with the body 9 ", the escape space 18 is previously formed in the thick side main plane 15" and the entire cooling unit 1
6 ". Generally, the thermal conductivity of air is low, so that the thermal conduction of the escape space 18 becomes insufficient, and the necessary cooling action may not be obtained.
【0028】上述のように本発明では、自動車用ホイー
ルの冷却工程において、冷却部体9aの全体冷却部16
aにより入子8a全体を冷却させ、ポイント冷却部14
aによりハブ部54を強制冷却させるため、欠陥等の発
生を防止でき得る。また、熱膨張収縮緩衝材13を冷却
部体9aのポイント冷却部14aと入子8aの薄肉側部
分平面11aの間に介在させたことにより、熱膨張収縮
によるポイント冷却部14aと薄肉側部分平面11a間
に空間の発生を防ぐことができ、かつ熱膨張収縮変形を
見越して逃がし空間18を設ける構成とする必要もなく
なるため、入子8aに対し適正な冷却作用を施すことが
できる。かかる本発明はこの形態に限定されるものでは
なく、この発明の要旨を逸脱しない範囲において、様々
な形態で実施しうるのものであり、自動車用ホイール以
外の製造においても適宜実施し得る。As described above, according to the present invention, in the cooling process of the automobile wheel, the entire cooling unit 16 of the cooling unit 9a is used.
The entire insert 8a is cooled by a, and the point cooling unit 14
Since the hub portion 54 is forcibly cooled by a, the occurrence of defects can be prevented. Further, by interposing the thermal expansion / contraction cushioning material 13 between the point cooling part 14a of the cooling part 9a and the thin side partial flat surface 11a of the insert 8a, the point cooling part 14a and the thin side partial flat surface due to thermal expansion / contraction. Since it is possible to prevent the generation of a space between 11a and to eliminate the need to provide the escape space 18 in anticipation of thermal expansion / contraction deformation, it is possible to perform a proper cooling action on the insert 8a. The present invention is not limited to this embodiment, and can be implemented in various forms without departing from the scope of the present invention, and can be appropriately implemented in manufacturing other than automobile wheels.
【0029】[0029]
【発明の効果】本発明は、自動車用ホイールの冷却部体
として、入子全体を冷却する全体冷却部と、ハブ部を強
制冷却するポイント冷却部を設けたことによって、全体
冷却部により自動車用ホイールの冷却速度を全体的に高
めつつ、ポイント冷却部により該冷却速度に合わせてハ
ブ部を局部的に強制冷却することができるため、全体と
して、適正な冷却作用を生じさせることができ、溶湯の
凝固がリム部最端部より湯口に向かって順次進行してい
く過程を作り得るため、欠陥等を防止して健全な自動車
用ホイール製品を効率的に製造できることとなる。As described above, according to the present invention, as the cooling unit for the automobile wheel, the entire cooling unit for cooling the entire insert and the point cooling unit for forcibly cooling the hub unit are provided, so that the entire cooling unit can be used for the automobile. While the wheel cooling rate is generally increased, the point cooling section can locally and forcibly cool the hub section according to the cooling rate, so that an appropriate cooling effect can be produced as a whole, and the molten metal Since a process in which the solidification of (1) progresses sequentially from the outermost end of the rim toward the sprue, defects and the like can be prevented and a sound automobile wheel product can be efficiently manufactured.
【0030】入子と接する冷却部体の全体冷却部とポイ
ント冷却部のいずれか又は両者に熱膨張収縮緩衝材を介
在させたことによって、熱膨張収縮変形による冷却部体
と入子の接触部に空間が発生することを防止でき、さら
には熱膨張収縮変形を見越して予め逃がし空間を設ける
必要も無くなるため、適切な冷却効果を常に得られるこ
ととなる。By interposing a thermal expansion / contraction cushioning material in either or both of the overall cooling part and the point cooling part of the cooling part body which is in contact with the insert, the contact part between the cooling part and the insert due to thermal expansion / contraction deformation. Since it is possible to prevent the occurrence of a space in the space and it is not necessary to provide an escape space in advance in anticipation of the thermal expansion / contraction deformation, an appropriate cooling effect can always be obtained.
【0031】この熱膨張収縮緩衝材に、熱伝導率に優
れ、耐熱性が高い弾性体としてグラファイトからなるシ
ート部材を使用することで、高い冷却効果と耐久性が得
られる。A high cooling effect and durability can be obtained by using a sheet member made of graphite as an elastic body having excellent thermal conductivity and high heat resistance for the thermal expansion / shrinkage buffer material.
【図1】本発明の自動車用ホイール金型1の断面図であ
る。FIG. 1 is a sectional view of an automobile wheel mold 1 of the present invention.
【図2】本発明にかかる入子8aと冷却部体9aの具体
例である。FIG. 2 is a specific example of an insert 8a and a cooling unit 9a according to the present invention.
【図3】本発明にかかる入子8bと冷却部体9bの具体
例である。FIG. 3 is a specific example of the insert 8b and the cooling unit 9b according to the present invention.
【図4】従来の入子8’と冷却部体9’の一例である。FIG. 4 is an example of a conventional insert 8'and a cooling body 9 '.
【図5】入子8”と冷却部体9”の間に逃がし空間18
を設定した比較例である。FIG. 5 is a relief space 18 between the insert 8 ″ and the cooling body 9 ″.
It is a comparative example in which is set.
1 金型 8a,8b 入子 9a,9b 冷却部体 11a,11b 薄肉側部分平面 13 熱膨張収縮緩衝材 14a,14b ポイント冷却部 15a,15b 厚肉側主平面 16a,16b 全体冷却部 1 mold 8a, 8b nesting 9a, 9b Cooling body 11a, 11b Partial plane of thin side 13 Thermal expansion / shrinkage buffer material 14a, 14b Point cooling unit 15a, 15b thick main surface 16a, 16b Whole cooling unit
Claims (3)
成して、該スポーク部成形湯路と対向する面を薄肉側部
分平面とし、さらに該薄肉部を除いた厚肉部のスポーク
部成形湯路と対向する面を厚肉側主平面としてなる自動
車用ホイール鋳型のキャビティーを画成する入子と、厚
肉側主平面に接触する全体冷却部と、薄肉側部分平面に
接触するポイント冷却部とを具備する冷却部体とを備
え、ポイント冷却部と薄肉側部分平面との間又は/及び
全体冷却部と厚肉側主平面との間に熱膨張収縮緩衝材を
介装したことを特徴とする自動車用ホイールの鋳造装
置。1. A spoke having a thick portion formed by forming a thin portion on a sprue side of a spoke portion forming runway, a surface facing the spoke portion forming runway being a thin side partial flat surface, and further excluding the thin portion. Part that defines the cavity of an automobile wheel mold whose surface facing the molding hot runway is the thick side main plane, the entire cooling section that contacts the thick side main plane, and the thin side partial plane And a cooling part body including a point cooling part, and a thermal expansion / shrinkage buffer material is interposed between the point cooling part and the thin-side partial plane surface and / or between the entire cooling part and the thick-side main plane surface. A casting device for automobile wheels, which is characterized in that
を両有する弾性体である請求項1記載の自動車用ホイー
ルの鋳造装置。2. The casting device for a wheel for an automobile according to claim 1, wherein the thermal expansion / shrinkage buffer material is an elastic body having both high thermal conductivity and heat resistance.
シート部材である請求項1又は請求項2に記載の自動車
用ホイールの鋳造装置。3. The automobile wheel casting apparatus according to claim 1, wherein the thermal expansion / shrinkage buffer material is a sheet member made of graphite.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001191913A JP4521135B2 (en) | 2001-06-25 | 2001-06-25 | Automotive wheel casting equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001191913A JP4521135B2 (en) | 2001-06-25 | 2001-06-25 | Automotive wheel casting equipment |
Publications (2)
Publication Number | Publication Date |
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JP2003010945A true JP2003010945A (en) | 2003-01-15 |
JP4521135B2 JP4521135B2 (en) | 2010-08-11 |
Family
ID=19030454
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JP2001191913A Expired - Fee Related JP4521135B2 (en) | 2001-06-25 | 2001-06-25 | Automotive wheel casting equipment |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102151795A (en) * | 2011-03-25 | 2011-08-17 | 浙江今飞机械集团有限公司 | Back casting method of hub of electric motorcycle and die |
CN105058001A (en) * | 2015-07-16 | 2015-11-18 | 昆山广标精密机械有限公司 | Method for machining side mould body of aluminum alloy hub casting mould |
CN105436421A (en) * | 2015-12-21 | 2016-03-30 | 上海亚德林有色金属有限公司 | Damper body mould structure for condensing parts by utilizing hollow structure and bracket |
KR101836487B1 (en) * | 2011-06-01 | 2018-03-08 | 아사히 테크 가부시키가이샤 | Mold for manufacturing wheel for vehicle and method for manufacturing the wheel using the same |
KR101906595B1 (en) * | 2011-06-01 | 2018-10-10 | 아사히 테크 가부시키가이샤 | Mold for manufacturing wheel for vehicle |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02138056U (en) * | 1989-04-14 | 1990-11-19 | ||
JP2000190065A (en) * | 1998-12-24 | 2000-07-11 | Sanuki Chuzo Tekko Kk | Casting method and casting seal material |
JP2001286982A (en) * | 2000-03-31 | 2001-10-16 | Asahi Tec Corp | Mold unit and mold unit of wheel for car |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0241735A (en) * | 1988-07-31 | 1990-02-09 | Asahi Tec Corp | Method for casting wheel for vehicle and mold thereof |
JPH06179045A (en) * | 1992-12-10 | 1994-06-28 | Hitachi Metals Ltd | Casting die |
JPH08229637A (en) * | 1995-02-23 | 1996-09-10 | Asahi Tec Corp | Protective device of copper alloy mold |
JPH08318362A (en) * | 1995-05-24 | 1996-12-03 | Asahi Tec Corp | Die device for casting |
-
2001
- 2001-06-25 JP JP2001191913A patent/JP4521135B2/en not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02138056U (en) * | 1989-04-14 | 1990-11-19 | ||
JP2000190065A (en) * | 1998-12-24 | 2000-07-11 | Sanuki Chuzo Tekko Kk | Casting method and casting seal material |
JP2001286982A (en) * | 2000-03-31 | 2001-10-16 | Asahi Tec Corp | Mold unit and mold unit of wheel for car |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102151795A (en) * | 2011-03-25 | 2011-08-17 | 浙江今飞机械集团有限公司 | Back casting method of hub of electric motorcycle and die |
KR101836487B1 (en) * | 2011-06-01 | 2018-03-08 | 아사히 테크 가부시키가이샤 | Mold for manufacturing wheel for vehicle and method for manufacturing the wheel using the same |
KR101906595B1 (en) * | 2011-06-01 | 2018-10-10 | 아사히 테크 가부시키가이샤 | Mold for manufacturing wheel for vehicle |
CN105058001A (en) * | 2015-07-16 | 2015-11-18 | 昆山广标精密机械有限公司 | Method for machining side mould body of aluminum alloy hub casting mould |
CN105436421A (en) * | 2015-12-21 | 2016-03-30 | 上海亚德林有色金属有限公司 | Damper body mould structure for condensing parts by utilizing hollow structure and bracket |
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