JP6715009B2

JP6715009B2 - Vehicle wheel and vehicle wheel decoration method

Info

Publication number: JP6715009B2
Application number: JP2016005885A
Authority: JP
Inventors: 修二郎稲谷; 和則伊藤; 努廣政; 靖之鳥居
Original assignee: 株式会社レイズエンジニアリング
Priority date: 2016-01-15
Filing date: 2016-01-15
Publication date: 2020-07-01
Anticipated expiration: 2036-01-15
Also published as: JP2017124777A

Description

本発明は、車両用ホイールのホイール意匠面が多色に塗り分けられてベース色とは異なる色を有する加飾部を具備する車両用ホイール及び車両用ホイールの加飾方法に関するものである。 TECHNICAL FIELD The present invention relates to a vehicle wheel including a decorative portion in which a wheel design surface of a vehicle wheel is colored in different colors and has a color different from a base color, and a vehicle wheel decoration method.

車両用ホイールにおいて、ホイール意匠面を塗装してベース色を施し、さらにベース色とは異なる色で塗り分けて様々な模様やロゴ等の加飾を施して、意匠性を高めたものが知られている。このような塗り分け技術として、マスキングを用いてホイール意匠面をベース色とは異なる色の加飾を施すことが行われているが、マスキングでは、３次元形状を有するホイール意匠面の立体的な曲面に対しては設計どおりに精細な加飾を綺麗に施すことが困難であった。また、別の技術手段として、第１の色を施したスポーク側面の一部分に金属面を露出させ、第１の色の部位では第１の色が略そのまま現れるが金属面では第２の色が現れるような第２の色のカラークリア塗料をスポーク全体に上塗りするものがあるが（特許文献３）、このものでは、マスキングは不要となるものの色の組合せが限られるという問題があった。 It is known that in vehicle wheels, the design surface of the wheel is painted to give it a base color, and then a different color from the base color is applied to decorate various patterns, logos, etc. to improve the design. ing. As such a coloring technique, a wheel design surface is decorated with a color different from the base color by using masking. In masking, the wheel design surface having a three-dimensional shape is three-dimensional. It was difficult to finely decorate a curved surface as designed. Further, as another technical means, the metal surface is exposed on a part of the side surface of the spoke having the first color, and the first color appears almost as it is at the portion of the first color, but the second color appears at the metal surface. There is a method of overcoating the entire spoke with a color clear paint of a second color that appears (Patent Document 3). However, this method has a problem that masking is unnecessary but the combination of colors is limited.

特願２０１４−１３７７２３号Japanese Patent Application No. 2014-137723 特願２０１４−１３７７２４号Japanese Patent Application No. 2014-137724 特開２０１０−１５８９８１号公報JP, 2010-158981, A

本出願人は、先に、上記従来の問題を解決する技術手段として、第１の色のベース色塗膜の上に、加飾塗膜としてディスペンサー等により第２の色の塗料をドット噴射式に吐出塗布して描画形成する技術を提案した（特許文献１、２）。一方、市場では、車両用ホイールのドレスアップ、プレミアム感等の様々な要望が根強く存在し、依然として高い意匠性を持った車両用ホイールが求められている。 As a technical means for solving the above-mentioned conventional problems, the present applicant has previously developed a dot-spray coating of a second color paint as a decorative coating film on a base color coating film of the first color by a dispenser or the like. A technique has been proposed in which the material is discharged and applied onto a substrate to form a pattern (Patent Documents 1 and 2). On the other hand, in the market, various demands such as dress-up of vehicle wheels, premium feeling, etc. are deeply entrenched, and vehicle wheels having high designability are still required.

本発明は、以上の事情に鑑みてなされたものであり、加飾部がより一層際立つような質感を呈する車両用ホイールを提供することを目的とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle wheel having a texture in which a decorative portion is more prominent.

本発明に係る車両用ホイールは、
金属素材のホイール本体としてリム、及び複数のスポークを有するディスクを備え、車両に装着した状態で外側から見える３次元形状のホイール意匠面が多色に塗り分けられてベース色部と加飾部とを有する車両用ホイールであって、
ベース色部は、ホイール意匠面の全体に第１の色の溶剤塗料で形成された第１の色のベース色塗膜を有し、
加飾部は、第１の色のベース色塗膜上の一部に第１の色とは異なる第２の色の溶剤塗料で描画形成された第２の色の加飾塗膜と、ホイール本体の母材金属が露出された金属露出部とを有し、
加飾部の金属露出部は、第２の色の加飾塗膜の周囲全体を囲むように第１の色のベース色塗膜の部位の塗膜もしくは第１の色のベース色塗膜と第２の色の加飾塗膜との積層部位の塗膜を切削した形態、又は／及び、第２の色の加飾塗膜の一部を第１の色のベース色塗膜と共に塗膜を切削してくり抜いた形態に形成されているものである。 The vehicle wheel according to the present invention,
A wheel body made of a metal material is provided with a rim and a disc having a plurality of spokes, and a wheel design surface of a three-dimensional shape that is visible from the outside when mounted on a vehicle is painted in multiple colors to form a base color portion and a decoration portion. A vehicle wheel having:
The base color portion has a base color coating film of the first color formed by the solvent paint of the first color on the entire wheel design surface,
The decorative part is a decorative coating film of a second color formed by drawing a solvent paint of a second color different from the first color on a part of the base color coating film of the first color, and a wheel. And a metal exposed portion where the base metal of the main body is exposed,
The metal exposed portion of the decorative portion is the base color coating film of the first color or the base color coating film of the first color so as to surround the entire periphery of the second color decorative coating film. A form in which the coating film in the laminated portion with the decorative coating film of the second color is cut, and /or a part of the decorative coating film of the second color is coated with the base color coating film of the first color It is formed by cutting and hollowing .

上記構成より、ホイール意匠面においては、ベース色部ではベース色塗膜の第１の色が外観され、加飾部では加飾塗膜の第２の色と金属露出部の金属色とがともに外観される。加飾部を構成する第２の色の加飾塗膜は、描画形成されているから、３次元形状のホイール意匠面に対してマスキングを用いることなく精細且つ綺麗に形成され、ホイール意匠面の意匠性を向上することができる。例えば、マスキングでは困難な細い線からなる加飾塗膜でも精細且つ綺麗に形成される。 With the above structure, on the wheel design surface, the first color of the base color coating film appears in the base color portion, and the second color of the decoration coating film and the metal color of the metal exposed portion both appear in the decoration portion. To be seen. Since the decorative coating film of the second color that constitutes the decorative portion is drawn and formed, it is finely and neatly formed on the wheel design surface of the three-dimensional shape without using masking. The designability can be improved. For example, a decorative coating film consisting of thin lines, which is difficult to mask, can be finely and neatly formed.

さらに、加飾部には、金属露出部は、第２の色の加飾塗膜の周囲全体を囲むように第１の色のベース色塗膜の部位の塗膜もしくは第１の色のベース色塗膜と第２の色の加飾塗膜との積層部位の塗膜を切削した形態、又は、第２の色の加飾塗膜の一部を第１の色のベース色塗膜と共に塗膜を切削してくり抜いた形態、あるいはその両方の形態で形成されている。これにより、第２の色の加飾塗膜は、金属露出部で輪郭を縁取ったり、塗装面内に金属露出させたロゴや切り抜き等を施すことができる。このようにして、精細且つ綺麗な第２の色の加飾塗膜に更に金属露出部を加えて構成するから、金属露出部による光輝効果と相まって一層際立った質感を呈し且つ多彩な加飾部を構成することができ、ホイール意匠面の意匠性を更に向上することができる。 Further, in the decorative portion, the metal exposed portion is the coating film of the base color coating film portion of the first color or the base of the first color so as to surround the entire periphery of the decorative coating film of the second color. A form in which the coating film at the laminated portion of the color coating film and the decorative coating film of the second color is cut, or a part of the decorative coating film of the second color together with the base color coating film of the first color The coating film is formed by cutting and hollowing the coating film , or both of them. As a result, the decorative coating film of the second color can have a contour at the metal exposed portion, or can have a metal-exposed logo or cutout on the coated surface. In this way, since the exposed metal portion is further added to the decorative coating film of the second color which is fine and beautiful, the decorative portion which exhibits a more distinctive texture in combination with the glitter effect of the exposed metal portion and which has various colors is provided. Can be configured, and the designability of the wheel design surface can be further improved.

第２の色の加飾塗膜は、第１の色のベース色塗膜が形成されているホイール意匠面の凹部内に形成されるようにしてよい。
この場合、３次元形状のホイール意匠面において凹部により第２の色の溶剤塗料を塗料溜りとし滲みだし等が防止されるから、第２の色の加飾塗膜がより精細且つ綺麗に設計どおりに形成され、しかも効率的に形成することができる。また、第２の色の加飾塗膜の周囲に金属露出部を形成する場合、凹部周囲に切削加工を施し易く、この位置が旋盤で切削加工が可能であればマシニングセンタでの切削加工よりも効率的且つ短時間で容易に金属露出部を形成することができる。従って、加飾部を効率的に且つ短時間で容易に形成することができる。 The decorative coating film of the second color may be formed in the recess of the wheel design surface where the base color coating film of the first color is formed.
In this case, since the concave portion on the design surface of the three-dimensional wheel serves as the solvent paint of the second color to prevent bleeding and the like, the decorative coating film of the second color can be more precisely and neatly designed. And can be formed efficiently. Further, when the exposed metal portion is formed around the decorative coating film of the second color, it is easy to perform the cutting work around the recessed portion, and if the cutting work can be performed by the lathe at this position, the cutting work can be performed more easily than the cutting work by the machining center. The exposed metal portion can be efficiently and easily formed in a short time. Therefore, the decorative portion can be efficiently and easily formed in a short time.

第２の色の加飾塗膜は、第２の色の溶剤塗料で点状、線状、又は面状に描画形成された所定デザインを構成したものとすることができる。
また、第１の色のベース色塗膜、第２の色の加飾塗膜、及び金属露出部より上の最上層にクリア塗料で形成されたクリアトップコート塗膜を備えることにより、ベース色部及び加飾部の耐食性を高くできる。 The decorative coating film of the second color may have a predetermined design which is drawn and formed in a dot shape, a linear shape, or a planar shape with the solvent paint of the second color.
In addition, by providing a base color coating film of the first color, a decorative coating film of the second color, and a clear topcoat coating film formed of a clear paint on the uppermost layer above the exposed metal portion, The corrosion resistance of the decorative portion and the decorative portion can be increased.

本発明に係る車両用ホイールの加飾方法は、
金属素材のホイール本体としてリム、及び複数のスポークを有するディスクを備える車両用ホイールにおいて車両に装着した状態で外側から見える３次元形状のホイール意匠面をベース色部と加飾部との多色に塗り分ける加飾方法であって、
防食及びレベリングを兼ねた下地塗装を施した後のホイール意匠面の全体に第１の色の溶剤塗料を塗装して、上記ベース色部となる第１の色のベース色塗膜を形成する工程と、
ホイール意匠面に沿って相対的にディスペンサーをＮＣプログラムに従って３軸又は５軸の各方向に移動させて送り速度と塗料吐出量の双方を制御しながら第１の色とは異なる第２の色の溶剤塗料をドット噴射式に吐出塗布して所定デザインを描画することにより、上記加飾部の一部となる第２の色の加飾塗膜を形成する工程と、
第２の色の加飾塗膜の周囲全体を囲むように第１の色のベース色塗膜の部位の塗膜もしくは第１の色のベース色塗膜と第２の色の加飾塗膜との積層部位の塗膜、又は／及び、第２の色の加飾塗膜の一部を第１の色のベース色塗膜と共に塗膜をくり抜く形態で、切削加工してホイール本体の母材金属を露出させて、上記加飾部の一部となる金属露出部を形成する工程とを有するものである。 A method for decorating a vehicle wheel according to the present invention,
In a vehicle wheel including a rim as a wheel body made of a metal material and a disc having a plurality of spokes, a three-dimensional wheel design surface that is visible from the outside when mounted on a vehicle has a multicolored base color portion and a decorative portion. It is a decoration method to paint differently,
A step of applying a solvent paint of a first color to the entire wheel design surface after applying a base coating that also serves as anti-corrosion and leveling to form a base color coating film of the first color to be the base color portion. When,
A second color different from the first color is controlled by moving the dispenser in each direction of three axes or five axes according to the NC program along the wheel design surface to control both the feed speed and the paint discharge amount. A step of forming a decorative coating film of a second color, which is a part of the decorative portion, by applying a solvent paint in a dot jet manner and drawing a predetermined design;
The coating film of the portion of the base color coating film of the first color or the base color coating film of the first color and the decoration coating film of the second color so as to surround the entire periphery of the decorative coating film of the second color And /or a part of the decorative coating film of the second color with the base color coating film of the first color is cut to form the mother film of the wheel body. And a step of exposing the material metal to form an exposed metal portion which becomes a part of the decorative portion.

これにより、上述した車両用ホイールが得られる。この場合、ディスペンサーをＮＣプログラムに従って３軸又は５軸の各方向に移動させることにより、ホイール意匠面の複合曲面であっても設計寸法どおりに第２の色の加飾塗膜を形成することができる。しかも、自由なデザインの加飾塗膜を施すことが可能であるから、様々な意匠バリエーションのデザインにも容易に対応することができる。 As a result, the vehicle wheel described above is obtained. In this case, by moving the dispenser in each direction of 3 axes or 5 axes according to the NC program, it is possible to form the decorative coating film of the second color according to the design dimension even on the composite curved surface of the wheel design surface. it can. Moreover, since it is possible to apply a decorative coating film of any design, it is possible to easily cope with various design variations.

なお、金属露出部の形成工程前に、第１の色のベース色塗膜及び第２の色の加飾塗膜をクリア塗料を塗装してクリアコート塗膜で覆うようにしてもよい。この場合、クリアコート塗膜により、金属露出部形成工程での切削加工によるベース色塗膜や加飾塗膜の欠け、割れ、傷等を防止することができる。 Before the step of forming the exposed metal portion, the base color coating film of the first color and the decorative coating film of the second color may be coated with clear paint and covered with the clear coat coating film. In this case, the clear coat coating film can prevent the base color coating film and the decorative coating film from being chipped, cracked, or scratched due to the cutting process in the metal exposed portion forming step.

本発明によれば、加飾部において、第２の色の加飾塗膜が精細且つ綺麗に形成され、さらには金属露出部の付加により一層際立った質感を呈し且つ多彩な加飾部とすることができ、ホイール意匠面の意匠性を更に向上することができる。 According to the present invention, the decorative coating film of the second color is finely and neatly formed in the decorative portion, and the addition of the metal exposed portion provides a more distinctive texture and a variety of decorative portions. Therefore, the design of the wheel design surface can be further improved.

実施形態１による車両用ホイールの外観を示す正面図である。1 is a front view showing the external appearance of a vehicle wheel according to Embodiment 1. FIG. 実施形態１の車両用ホイールにおける加飾部の部分を拡大した正面図である。FIG. 3 is an enlarged front view of the decorative portion of the vehicle wheel of the first embodiment. ホイール意匠面における塗膜形成過程を示す模式図である。It is a schematic diagram which shows the coating film formation process in a wheel design surface. 第２の色の加飾塗膜形成に使用されるディスペンサーの構成を示す模式図である。It is a schematic diagram which shows the structure of the dispenser used for formation of a 2nd color decorative coating film. 実施形態２の車両用ホイールであってホイール意匠面に凹部を設けて加飾部を形成する場合の塗膜形成過程を示す模式図である。FIG. 6 is a schematic diagram showing a process of forming a coating film in the vehicle wheel of Embodiment 2 when a decorative portion is formed by providing a recess on a wheel design surface.

以下に、本発明の実施形態を添付図面を用いて説明する。
なお、本実施形態では、鍛造・スピニングにより成形された軽合金製の車両用ホイールでの塗装工程に適用されるが、本発明は、これに限らず、車両用ホイールの製法や材質を問わず適用可能であり、また、リムとディスクとが一体構造か分割構造かのいずれのタイプにも適用可能である。 Embodiments of the present invention will be described below with reference to the accompanying drawings.
Note that, in the present embodiment, although applied to a coating process with a light alloy vehicle wheel formed by forging/spinning, the present invention is not limited to this and is not limited to the manufacturing method and the material of the vehicle wheel. It is applicable to both types of the rim and the disc, that is, the integral structure or the divided structure.

（実施形態１）
図１、図２に示す車両用ホイール１は、軽合金製、例えばアルミニウム合金からなり、ディスク部３とリム部２とから構成されている。ディスク部３は、車両ハブと嵌合するハブ穴４と、ハブ穴４から外周方向に放射状に設けられた複数のスポーク５とを備えている。この車両用ホイール１のホイール意匠面は、基調色（第１の色）のベース色部６と基調色以外の色（第２の色）の着色部分を有する加飾部７，７ａとを有して多色に塗り分けられている。ホイール意匠面は、車両用ホイール１を車両に装着した状態で外側から見えるリム部２及びディスク部３の表面であり、スポーク５の天面及び側面を含む。ホイール意匠面は、３次元形状を有し、例えば、丸みのあるＲ状、丸みのない角状、凸状、凹状等のような立体的な曲面を有している。このホイール意匠面における塗膜構成として、図３（ｄ）に示すように、ベース色部６では、プライマー塗膜１１、ベース色塗膜１２、クリアトップコート塗膜１４を備え、加飾部７では、ベース色塗膜１２とクリアトップコート塗膜１４の間に加飾塗膜１３を設けた着色部分と、クリアトップコート塗膜１４の下には母材金属が露出された金属露出部１３ａとなった光輝部分とを備えている。また、加飾部７ａは、ベース色塗膜１２とクリアトップコート塗膜１４の間に加飾塗膜１３を設けた着色部分を有し、金属露出部１３ａを有しないものである。これらの塗膜は、それぞれの目的等に対応する溶剤塗料を塗装することによって形成され、溶剤塗料としては、一般的には焼付け塗料が好ましく使用される。 (Embodiment 1)
The vehicle wheel 1 shown in FIGS. 1 and 2 is made of a light alloy, for example, an aluminum alloy, and includes a disc portion 3 and a rim portion 2. The disk portion 3 includes a hub hole 4 that fits into the vehicle hub, and a plurality of spokes 5 that are radially provided from the hub hole 4 in the outer peripheral direction. The wheel design surface of the vehicle wheel 1 has a base color portion 6 having a basic color (first color) and decorative portions 7 and 7a having colored portions other than the basic color (second color). It is then painted in different colors. The wheel design surface is the surface of the rim portion 2 and the disk portion 3 that are visible from the outside when the vehicle wheel 1 is mounted on the vehicle, and includes the top surface and side surfaces of the spokes 5. The wheel design surface has a three-dimensional shape, and has a three-dimensional curved surface such as a rounded R shape, a non-rounded corner shape, a convex shape, and a concave shape. As shown in FIG. 3( d ), the base color portion 6 includes a primer coating film 11, a base color coating film 12, and a clear top coat coating film 14 as a coating film configuration on the wheel design surface. Then, the colored portion in which the decorative coating film 13 is provided between the base color coating film 12 and the clear top coat coating film 14 and the metal exposed portion 13a where the base metal is exposed under the clear top coat coating film 14 It has a bright part. Further, the decorative portion 7a has a colored portion in which the decorative coating film 13 is provided between the base color coating film 12 and the clear top coat coating film 14, and does not have the metal exposed portion 13a. These coating films are formed by applying solvent paints corresponding to respective purposes and the like, and baking paints are generally preferably used as the solvent paints.

以上の塗膜構成は、次のようにして形成される。
なお、塗膜形成前における金属素材のホイール本体１０は、表面全体に防食性を高める等のための前処理としてアルカリ脱脂及びクロメート処理等の化成処理が施される。化成処理後のホイール本体１０は、水洗い、乾燥される。 The coating film structure described above is formed as follows.
The wheel body 10 made of a metal material before the coating film is formed is subjected to chemical conversion treatment such as alkali degreasing and chromate treatment as a pretreatment for enhancing corrosion resistance and the like. After the chemical conversion treatment, the wheel body 10 is washed with water and dried.

この後、ホイール本体１０の全面に、防食ならびにレベリング目的にプライマー塗料を塗装してプライマー塗膜１１を形成し、このプライマー塗膜１１の上から第１の色、例えば白色や黒色の溶剤塗料を塗装することで第１の色のベース色塗膜１２を形成する（ベース色塗膜形成工程、図３（ａ）参照）。この第１の色が車両用ホイール１におけるホイール意匠面の基調色たるベース色となる。第１の色の溶剤塗料は、第１の色となる顔料を含む各種の溶剤樹脂塗料を使用することができる。第１の色としては、上述の白色や黒色の他に、赤色、青色、黄色、緑色等の各種の色を選択することができる。 After that, a primer paint is applied to the entire surface of the wheel body 10 for the purpose of anticorrosion and leveling to form a primer paint film 11, and a first color, for example, white or black solvent paint is applied onto the primer paint film 11. The base color coating film 12 of the first color is formed by coating (base color coating film forming step, see FIG. 3A). This first color serves as a base color that is the basic color of the wheel design surface of the vehicle wheel 1. As the solvent paint of the first color, various solvent resin paints containing the pigment of the first color can be used. As the first color, various colors such as red, blue, yellow, and green can be selected in addition to the above white and black.

次に、第１の色のベース色塗膜１２上の一部に第１の色とは異なる第２の色の溶剤塗料をディスペンサー８によって吐出塗布して描画することにより第２の色の加飾塗膜１３を形成する（加飾塗膜形成工程、図３（ｂ）参照）。この第２の色の加飾塗膜１３は、リム部２のフランジ表面、スポーク５の天面及び側面を含むディスク部３の表面等のようにホイール意匠面の立体的な曲面全体における任意の位置、範囲に施すことができ、ホイール意匠面の立体曲面においてベース色部６と塗り分けられた加飾部７となって装飾効果を発揮させる。第２の色の溶剤塗料は、第２の色となる顔料を含む各種の溶剤樹脂塗料を使用することができる。第２の色としては、第１の色と同様に白色、黒色、赤色、青色、黄色、緑色等の各種の色とすることができるが、第１の色とは異なる色が選択される。第２の色としては、第１の色とコントラストの異なる色彩差がわかる色を選択するのが好ましい。また、第２の色の溶剤樹脂塗料には、所望の発色剤を含有させて第２の色がベース色の第１の色に対して一層際立つようにすることもできる。 Next, a part of the base color coating film 12 of the first color is applied with a solvent paint of a second color different from the first color by the dispenser 8 to draw and draw the second color. The decorative coating film 13 is formed (decorative coating film forming step, see FIG. 3B). The decorative coating film 13 of the second color has an arbitrary three-dimensional curved surface of the wheel design surface, such as the flange surface of the rim portion 2 and the surface of the disk portion 3 including the top and side surfaces of the spokes 5. It can be applied to a position and a range, and serves as a decorative portion 7 that is painted separately from the base color portion 6 on the three-dimensional curved surface of the wheel design surface to exert a decorative effect. As the solvent paint of the second color, various solvent resin paints containing the pigment of the second color can be used. The second color can be various colors such as white, black, red, blue, yellow, and green as in the first color, but a color different from the first color is selected. As the second color, it is preferable to select a color having a contrast different from that of the first color and showing a color difference. Further, the second color solvent resin coating material may contain a desired color former so that the second color is more prominent than the first color of the base color.

次に、加飾部７では、加飾塗膜１３とベース色塗膜１２との境界部をマシニングセンタ等にて切削加工してホイール本体１０の母材金属を露出させた金属露出部１３ａを形成する（金属露出部形成工程、図３（ｃ）参照）。これにより、加飾塗膜１３の周囲が金属露出部１３ａで縁取られた加飾部７となる。ここで、上記切削加工を施す範囲として、加飾塗膜１３とベース色塗膜１２との境界部とは、第２の色の加飾塗膜１３の輪郭に沿って、加飾塗膜１３の外周囲の第１の色のベース色塗膜１２のみの範囲か、第１の色のベース色塗膜１２と第２の色の加飾塗膜１３とが跨った範囲か、あるいは加飾塗膜１３の内周囲の第１の色のベース色塗膜１２と第２の色の加飾塗膜１３とが積層した範囲のみか、いずれかの範囲に対して切削加工を施してもよい。すなわち、出来上がりとして加飾塗膜１３の周囲に金属露出部１３ａが形成されるように切削加工を行えばよく、その際、加飾塗膜１３が形成されているホイール意匠面の位置や形状等に応じてベース色塗膜１２の部位やベース色塗膜１２と加飾塗膜１３との積層部位を含む範囲等に切削加工を施すことができる。なお、金属露出部１３ａは、加飾塗膜１３の周囲とともに加飾塗膜１３の塗装面内の一部にも切削加工を行って加飾塗膜１３の塗装面の内側をくり抜くような形態に形成してもよいし（図３（ｅ）参照）、また、加飾塗膜１３の塗装面の内側をくり抜くような形態のみとなる金属露出部１３ａを形成することでもよい。また、加飾塗膜１３の塗装面内に彫刻にてロゴ等の加工を付加してもよく、これにより、さらに加飾性を向上することができる。
一方、加飾部７ａ（図１、図２参照）では、第２の色の加飾塗膜１３を形成したままとし、上述の金属露出部１３ａを形成しない部分である。 Next, in the decorative portion 7, a boundary portion between the decorative coating film 13 and the base color coating film 12 is cut by a machining center or the like to form a metal exposed portion 13a in which the base metal of the wheel body 10 is exposed. (Step of forming exposed metal portion, see FIG. 3C). As a result, the periphery of the decorative coating film 13 becomes the decorative portion 7 bordered by the metal exposed portion 13a. Here, as the range to be subjected to the cutting process, the boundary portion between the decorative coating film 13 and the base color coating film 12 is along the contour of the decorative coating film 13 of the second color, A range of only the base color coating film 12 of the first color around the outer periphery of the above, or a range extending between the base color coating film 12 of the first color and the decorative coating film 13 of the second color, or decoration The cutting process may be performed only on the range in which the base color coating film 12 of the first color and the decorative coating film 13 of the second color on the inner periphery of the coating film 13 are laminated, or in any range. .. That is, cutting may be performed so that the metal exposed portion 13a is formed around the decorative coating film 13 as a finished product. At that time, the position and shape of the wheel design surface on which the decorative coating film 13 is formed, etc. Depending on the requirement, the cutting process can be performed on the region of the base color coating film 12, the range including the laminated region of the base color coating film 12 and the decorative coating film 13, and the like. In addition, the metal exposed portion 13a is a form in which the inside of the coated surface of the decorative coating film 13 is hollowed out by cutting the periphery of the decorative coating film 13 as well as part of the coating surface of the decorative coating film 13. (See FIG. 3E), or the metal exposed portion 13a may be formed by hollowing out the inside of the coated surface of the decorative coating film 13. Further, a process such as a logo may be added by engraving on the coated surface of the decorative coating film 13, whereby the decorative property can be further improved.
On the other hand, in the decorative portion 7a (see FIGS. 1 and 2), the decorative coating film 13 of the second color is left formed, and the metal exposed portion 13a is not formed.

その後、ベース色塗膜１２、加飾塗膜１３及び金属露出部１３ａの上からクリア塗料を塗装して最上層にクリアトップコート塗膜１４を形成する（クリアトップコート塗膜形成工程、図３（ｄ）参照）。以上でホイール意匠面の塗膜形成が完了する。このクリアトップコート塗膜１４の形成により、ベース色塗膜１２、加飾塗膜１３のみならず金属露出部１３ａの耐候性を向上することができる。クリア塗料は、溶剤樹脂塗料が使用され、ベース色塗膜１２や加飾塗膜１３を色調変化させないように無色のクリア塗料を使用するのが好ましいが、有色のクリア塗料を用いてベース色塗膜１２や加飾塗膜１３を色調変化させるようにしてもよい。また、艶消しを行う場合は、艶消しクリア塗料を用いることができる。 After that, a clear paint is applied on the base color coating film 12, the decorative coating film 13, and the metal exposed portion 13a to form a clear top coat coating film 14 on the uppermost layer (clear top coat coating film forming step, FIG. (See (d)). This completes the coating film formation on the wheel design surface. By forming this clear top coat coating film 14, it is possible to improve the weather resistance of not only the base color coating film 12 and the decorative coating film 13 but also the metal exposed portion 13a. As the clear paint, a solvent resin paint is used, and it is preferable to use a colorless clear paint so as not to change the color tone of the base color coating film 12 and the decorative coating film 13, but it is preferable to use a colored clear paint for the base color coating. The color tone of the film 12 and the decorative coating film 13 may be changed. Further, in the case of matting, a matte clear paint can be used.

ベース色塗膜１２、加飾塗膜１３、クリアトップコート塗膜１４は、溶剤樹脂塗料が用いられる。従って、ベース色塗膜１２と加飾塗膜１３とが溶剤樹脂塗料同士の結合によるから、ベース色塗膜１２と加飾塗膜１３との間の密着性に優れ、定着性のよい加飾塗膜１３をホイール意匠面の立体的な曲面に形成することができる。また、クリアトップコート塗膜１４に用いるクリア塗料も溶剤樹脂塗料であるから、溶剤樹脂塗料同士の結合により、クリアトップコート塗膜１４とベース色塗膜１２及び加飾塗膜１３との間の密着性に優れ、クリアトップコート塗膜１４による保護耐久性が優れたものとなる。この場合、ベース色塗膜１２、加飾塗膜１３、クリアトップコート塗膜１４のそれぞれの溶剤樹脂塗料に含む主成分樹脂が同種の樹脂であることが好ましい。また、ベース色塗膜１２、加飾塗膜１３、クリアトップコート塗膜１４の各塗膜の形成をウエット・オン・ウエット塗装で行うことができ、焼付け乾燥により、各塗膜１２，１３，１４間の結合をより強固にすることができる。 Solvent resin paints are used for the base color coating film 12, the decorative coating film 13, and the clear top coat coating film 14. Therefore, since the base color coating film 12 and the decorative coating film 13 are bonded to each other by the solvent resin coatings, the decoration between the base color coating film 12 and the decorative coating film 13 is excellent and the fixing property is good. The coating film 13 can be formed on a three-dimensional curved surface of the wheel design surface. Further, since the clear paint used for the clear top coat coating film 14 is also a solvent resin paint, by bonding the solvent resin paints between the clear top coat coating film 14 and the base color coating film 12 and the decorative coating film 13, The adhesiveness is excellent, and the protective durability by the clear top coat coating film 14 is also excellent. In this case, it is preferable that the main component resins contained in the solvent resin paints of the base color coating film 12, the decorative coating film 13, and the clear top coat coating film 14 are the same type of resin. Further, each of the base color coating film 12, the decorative coating film 13, and the clear top coat coating film 14 can be formed by wet-on-wet coating, and each coating film 12, 13, The bond between 14 can be made stronger.

以上の塗膜構成を有する車両用ホイール１によれば、ホイール意匠面においては、ベース色部６ではベース色塗膜１２の第１の色が外観され、加飾部７では加飾塗膜１３の第２の色と金属露出部１３ａの金属色とがともに外観されることとなる。また、加飾部７に隣接する加飾部７ａでは加飾塗膜１３の第２の色が外観されることとなる。加飾部７や加飾部７ａを構成する第２の色の加飾塗膜１３は、描画形成されているから、３次元形状のホイール意匠面に対してマスキングを用いることなく精細且つ綺麗に形成され、ホイール意匠面の意匠性を向上することができる。例えば、マスキングでは困難な細い線からなる加飾塗膜１３でも精細且つ綺麗に形成される。 According to the vehicle wheel 1 having the above coating film configuration, on the wheel design surface, the first color of the base color coating film 12 appears in the base color portion 6 and the decoration coating film 13 in the decoration portion 7 The second color and the metal color of the metal exposed portion 13a are both visible. In addition, the second color of the decorative coating film 13 is to be seen in the decorative portion 7a adjacent to the decorative portion 7. Since the decorative coating film 13 of the second color forming the decorative portion 7 and the decorative portion 7a is drawn and formed, the three-dimensional wheel design surface can be finely and neatly formed without using masking. It is formed, and the design of the wheel design surface can be improved. For example, the decorative coating film 13 made of fine lines, which is difficult to mask, can be finely and neatly formed.

さらに、加飾部７では、金属露出部１３ａが第１の色のベース色塗膜１２と第２の色の加飾塗膜１３との境界部に形成されている。これにより、第２の色の加飾塗膜１３は、金属露出部１３ａで輪郭を縁取った形態とすることができる。このようにして、加飾部７は、精細且つ綺麗な第２の色の加飾塗膜１３に更に金属露出部１３ａを加えて構成するから、金属露出部１３ａによる光輝効果と相まって一層際立った質感を呈し且つ多彩な加飾を構成することができ、ホイール意匠面の意匠性を更に向上することができる。 Further, in the decorative portion 7, the metal exposed portion 13a is formed at the boundary between the base color coating film 12 of the first color and the decorative coating film 13 of the second color. Thereby, the decorative coating film 13 of the second color can be in a form in which the metal exposed portion 13a has a contour. In this way, since the decorative portion 7 is configured by adding the metal exposed portion 13a to the fine and beautiful decorative coating film 13 of the second color, it is more prominent in combination with the glitter effect by the metal exposed portion 13a. A texture can be exhibited and various decorations can be configured, and the design of the wheel design surface can be further improved.

従って、加飾部７において、第２の色の加飾塗膜１３が精細且つ綺麗に形成され、さらには金属露出部１３ａの付加により一層際立った質感を呈し且つ多彩な加飾部７とすることができ、ホイール意匠面の意匠性を更に向上することができる。その結果、ユーザの要望として車両用ホイール１のドレスアップ、プレミアム感等に応えられるような高い意匠性を持った車両用ホイール１を提供することができる。 Therefore, the decorative coating film 13 of the second color is finely and neatly formed in the decorative portion 7, and the addition of the metal exposed portion 13a provides a more distinctive texture and a variety of decorative portions 7. Therefore, the design of the wheel design surface can be further improved. As a result, it is possible to provide the vehicle wheel 1 having a high design property that can meet the demands of the user for dressing up the vehicle wheel 1, premium feeling and the like.

次に、加飾部７，７ａの形成方法について説明する。
加飾部７，７ａにおける第２の色の加飾塗膜１３は、ディスペンサー８を用いて第２の色の溶剤塗料を吐出塗布して描画することにより形成されるが、この場合、例えば、ホイール本体１０の仕上げ加工等に使用される加工機９にて、第２の色の溶剤塗料による描画工程（加飾塗膜形成工程）を実施することができる。なお、加飾塗膜１３の描画形成には、ディスペンサー８に限らず、例えば、インクジェットヘッド、ピースガン等のような溶剤塗料を指向性を持って線状又は点状に吐出塗布する手段を用いてもよい。 Next, a method of forming the decorative portions 7 and 7a will be described.
The decorative coating film 13 of the second color on the decorative portions 7 and 7a is formed by discharging and drawing the solvent paint of the second color using the dispenser 8, and in this case, for example, The drawing process (decorative coating film forming process) using the solvent paint of the second color can be performed by the processing machine 9 used for finishing the wheel body 10. Note that the decorative coating film 13 is not limited to the dispenser 8 for drawing and forming, but for example, a means such as an ink jet head, a piece gun, or the like, which is used to eject and apply a solvent paint in a linear or dot shape with directivity. Good.

ディスペンサー８は、上述のとおり、例えば、ホイール本体１０の仕上げ加工等に使用される加工機９に取り付けて使用することができ、図４に示すように、加工機９において工具ホルダー９１に取り付けられている工具（図示せず）をディスペンサーノズル８１と取り替えて使用される。この加工機９は、ディスペンサーノズル８１を、前後方向（Ｘ軸）、左右方向（Ｙ軸）、上下方向（Ｚ軸）の３軸に移動可能であるか、これに加えてＸ軸周りの旋回（Ａ旋回）及びＹ軸周りの旋回（Ｂ旋回）も可能な５軸に移動可能なものが使用される。なお、３軸又は５軸の移動は、ディスペンサーノズル８１だけによる移動に限らず、ワークＷとなるホイール本体１０を固定するワークテーブル９２の移動と合せて実現されることでもよい。そして、ディスペンサーノズル８１を取り付けた加工機９では、ＮＣプログラムに基づいてディスペンサーノズル８１を３軸又は５軸に動かし、ワーク（ベース色塗膜１２形成後のホイール本体１０）Ｗの塗装面と一定のクリアランスを保持してディスペンサーノズル８１の移動ならびに塗装範囲を制御しながら、塗装面に第２の色の溶剤塗料を吐出塗布して描画することにより、ホイール意匠面の立体的な曲面におけるベース色塗膜１２上に第２の色の加飾塗膜１３を形成する。 As described above, the dispenser 8 can be used, for example, by being attached to the processing machine 9 used for finishing the wheel body 10 or the like. As shown in FIG. 4, the dispenser 8 is attached to the tool holder 91 in the processing machine 9. The tool (not shown) used is replaced with the dispenser nozzle 81 and used. This processing machine 9 is capable of moving the dispenser nozzle 81 in three axes of a front-back direction (X axis), a left-right direction (Y axis), and a vertical direction (Z axis), or in addition to this, turning around the X axis. A movable unit is used that can move to five axes (A turn) and Y-axis turn (B turn). It should be noted that the movement of the three axes or the five axes is not limited to the movement by only the dispenser nozzle 81, and may be realized together with the movement of the work table 92 that fixes the wheel main body 10 to be the work W. Then, in the processing machine 9 to which the dispenser nozzle 81 is attached, the dispenser nozzle 81 is moved to three axes or five axes based on the NC program, and the work surface (the wheel main body 10 after the base color coating film 12 is formed) W has a constant coating surface. While controlling the movement of the dispenser nozzle 81 and the coating range while maintaining the clearance between the two, the solvent paint of the second color is applied and drawn on the painted surface to draw the base color on the three-dimensional curved surface of the wheel design surface. The decorative coating film 13 of the second color is formed on the coating film 12.

ディスペンサー８を用いて第２の色の溶剤塗料を吐出塗布して描画することにより、ホイール意匠面の立体的な曲面に対して簡易に且つ綺麗な加飾塗膜１３を形成することができ、例えば、従来はデカール等でしかできないような小さな文字やロゴなどの細かい装飾であっても簡易に且つ綺麗な加飾塗膜１３として形成することができる。また、ディスペンサー８をＮＣプログラムに従って３軸又は５軸の各方向に移動させることにより、デカール等ではしわが出来たりして綺麗に貼り付けるのが難しかったホイール意匠面の複合曲面であっても設計寸法どおりに綺麗な加飾塗膜１３を形成することができる。従来のマスキングによりホイール意匠面を塗り分けて加飾する場合と比べても、簡易に且つ綺麗な加飾塗膜１３を形成することができる。しかも、ディスペンサー８による描画形成によれば、自由なデザインの加飾塗膜１３を形成することが可能であるから、デカール等のようにデザイン毎に応じた仕様のものを用意する必要もなく、塗料と加工データのみで様々な意匠バリエーション、デザインにも容易に対応することができる。また、デカール等では様々な仕様、バリエーションのものを用意して貼付作業が人的作業で手間取るのに対して、ディスペンサー８による描画形成によれば、効率的かつ個人差等なく加飾塗膜１３の形成が可能である。 By applying and drawing the solvent paint of the second color using the dispenser 8, it is possible to easily and beautifully form the decorative coating film 13 on the three-dimensional curved surface of the wheel design surface, For example, even a small decoration such as a small character or a logo, which is conventionally only possible with a decal or the like, can be easily formed as a beautiful decorative coating film 13. By moving the dispenser 8 in each direction of 3 axes or 5 axes according to the NC program, even a complex curved surface of the wheel design surface, which was difficult to cleanly attach due to wrinkles on decals or the like, was designed. It is possible to form a beautiful decorative coating film 13 according to the dimensions. The decorative coating film 13 can be formed easily and neatly as compared with the case where the wheel design surface is separately painted by the conventional masking for decoration. Moreover, since the decorative coating film 13 having a free design can be formed by drawing and forming with the dispenser 8, it is not necessary to prepare a design according to each design such as a decal. It is possible to easily handle various design variations and designs using only paint and processing data. Further, while decals and the like having various specifications and variations are prepared, the sticking work is labor-intensive, whereas the drawing formation by the dispenser 8 makes the decorative coating film 13 efficient and without individual differences. Can be formed.

ディスペンサー８は、ディスペンサーノズル８１のノズル径、ディスペンサーノズル８１と塗装面とのクリアランス、溶剤塗料の吐出量、及びＮＣプログラムの座標データ等を適宜に設定して第２の色の溶剤塗料を吐出塗布して描画する。そして、ディスペンサー８により第２の色の溶剤塗料を吐出塗布して線や点を描くようにする構成とすれば、線や点で形成する繊細な加飾塗膜１３でもホイール意匠面の立体的な曲面全体にわたって容易に形成することができる。例えば、図５に示すように、ディスク部３の外周の狭い範囲であっても繊細な加飾塗膜１３を容易に形成することができる。また、ディスペンサー８により第２の色の溶剤塗料を一定範囲にわたって吐出塗布することで、面状（ベタ塗り）の加飾塗膜１３も容易に形成することができる。 The dispenser 8 appropriately sets the nozzle diameter of the dispenser nozzle 81, the clearance between the dispenser nozzle 81 and the coating surface, the discharge amount of the solvent paint, the coordinate data of the NC program, and the like, and discharges and applies the solvent paint of the second color. And draw. If the dispenser 8 is used to discharge and apply the solvent paint of the second color to draw lines and dots, even the delicate decorative coating film 13 formed by lines and dots has a three-dimensional appearance on the wheel design surface. It can be easily formed over the entire curved surface. For example, as shown in FIG. 5, the delicate decorative coating film 13 can be easily formed even in the narrow range of the outer periphery of the disc portion 3. Further, the solvent coating material of the second color is discharged and applied by the dispenser 8 over a certain range, so that the decorative coating film 13 having a planar shape (solid coating) can be easily formed.

このように、ディスペンサー８の設定次第で点や線、面（一定範囲）の吐出塗布が可能であるから、ロゴマーク、文字、記号、図形、模様、柄等の描画で表現可能な様々なタイプの加飾塗膜１３、ベタ塗りの加飾塗膜１３、その他にも様々な形態の加飾塗膜１３を形成することができ、ホイール意匠面の立体的な曲面に対して多彩な塗り分けを簡単に実現することができる。また、第２の色の溶剤塗料の使用量を必要最低限にして余剰な塗料使用を抑えることができ、コスト、作業環境面にも優れた塗装が実現される。 As described above, since it is possible to apply and dispense dots, lines, and surfaces (fixed range) depending on the settings of the dispenser 8, various types that can be expressed by drawing logo marks, characters, symbols, figures, patterns, patterns, etc. It is possible to form the decorative coating film 13 of No. 3, the decorative coating film 13 of solid coating, and other various forms of the decorative coating film 13, and various coatings can be applied to the three-dimensional curved surface of the wheel design surface. Can be easily realized. Further, the amount of the second color solvent paint used can be minimized to suppress the excessive use of the paint, and the coating excellent in cost and working environment can be realized.

ディスペンサーノズル８１からは、第２の色の溶剤塗料を連続的に吐出塗布する構成でもよいが、第２の色の溶剤塗料をドット噴射式に間欠的に吐出塗布する構成とするのが好ましい。溶剤塗料をドット状に噴射して吐出塗布する場合は、ディスペンサーノズル８１と塗装面との間のクリアランス（距離）を比較的大きくしても、塗料溜りが出来ずにディスペンサーノズル８１の軌跡に従って綺麗に描画することができる。従って、上記クリアランスを大きく設定することにより、ディスペンサーノズル８１とワークＷとの衝突が確実に回避され、ディスペンサーノズル８１の可動範囲を広げることができる。その結果、３次元形状のホイール意匠面のあらゆる場所に様々な形態の加飾塗膜１３を容易に描画形成することができ、また、ホイール意匠面の複雑な曲面であっても設計寸法どおりに加飾塗膜１３を容易に描画形成することができる。 The dispenser nozzle 81 may have a configuration in which the solvent paint of the second color is continuously discharged and applied, but a configuration in which the solvent paint of the second color is intermittently discharged and applied by a dot jet method is preferable. When the solvent paint is sprayed and applied in a dot form, even if the clearance (distance) between the dispenser nozzle 81 and the coating surface is relatively large, the paint cannot be collected and the dispenser nozzle 81 cleans up according to the trajectory. Can be drawn on. Therefore, by setting the clearance large, the collision between the dispenser nozzle 81 and the work W can be reliably avoided, and the movable range of the dispenser nozzle 81 can be widened. As a result, it is possible to easily draw and form the decorative coating film 13 in various forms on every place of the three-dimensional wheel design surface, and even if the wheel design surface has a complicated curved surface, it can be formed as designed. The decorative coating film 13 can be easily drawn and formed.

また、ディスペンサーノズル８１から第２の色の溶剤塗料を連続吐出する場合でも間欠吐出する場合でも、ディスペンサーノズル８１の送り速度や塗料吐出量を制御することにより、加飾塗膜１３の色の濃さや線の太さ等を設定することができる。さらに、ディスペンサーノズル８１から第２の色の溶剤塗料を連続吐出する場合でも間欠吐出する場合でも、例えば、描画ラインのコーナー部では、ディスペンサーノズル８１の移動速度の低下に伴って塗料吐出量を減少させることで、線幅が太くならず直線部での線幅と均一に揃えること等も容易に行える。 In addition, whether the solvent paint of the second color is continuously discharged or intermittently discharged from the dispenser nozzle 81, by controlling the feed speed of the dispenser nozzle 81 and the paint discharge amount, the color density of the decorative coating film 13 can be increased. It is possible to set the thickness of the sheath and the like. Further, whether the second color solvent paint is continuously discharged or intermittently discharged from the dispenser nozzle 81, for example, in the corner portion of the drawing line, the paint discharge amount is reduced as the moving speed of the dispenser nozzle 81 is decreased. By doing so, the line width does not become thick, and it is possible to easily make it uniform with the line width in the straight line portion.

ディスペンサー８は、単一のディスペンサーノズル８１により単一色の第２の色の溶剤塗料を吐出塗布する構成に限らず、第２の色の溶剤塗料として異なる色の溶剤塗料をそれぞれ吐出塗布する複数のディスペンサーノズル８１を用いて色替え可能に構成することができる。これにより、色違いの加飾塗膜１３を組み合わせた加飾部７も簡単に形成することができ、カラーバリエーションが豊富な加飾部７によってホイール意匠面の装飾効果をさらに向上することができる。従って、ホイール意匠面を構成するリム部２やディスク部３の立体的な曲面全体における任意の位置に任意の範囲で自由なデザインの加飾部７を単色のみならず多色に施すことができる。そして、これに金属露出部１３ａを付加することで更なる装飾性を付加することが可能である。 The dispenser 8 is not limited to a configuration in which a single dispenser nozzle 81 discharges and applies a single color second color solvent paint, but a plurality of dispenser 8 that discharges and applies different color solvent paints as a second color solvent paint, respectively. The color can be changed using the dispenser nozzle 81. Thereby, the decorative portion 7 in which the decorative coating films 13 of different colors are combined can be easily formed, and the decorative effect on the wheel design surface can be further improved by the decorative portion 7 having a wide variety of colors. .. Therefore, it is possible to apply not only a single color but also a multicolored decorative portion 7 having a free design in an arbitrary range at an arbitrary position on the entire three-dimensional curved surface of the rim portion 2 or the disk portion 3 which constitutes the wheel design surface. .. Further, it is possible to add further decorativeness by adding the metal exposed portion 13a to this.

ディスペンサー８により粘度の高い第２の色の溶剤塗料を吐出塗布する構成とすることができる。粘度の高い溶剤塗料を用いることにより、塗料溜りや液だれ、さらには見切り等を抑制することができる。これにより、３次元形状を有するホイール意匠面の傾斜面や曲面等に第２の色の溶剤塗料を吐出塗布したときでも塗料が液だれや溜り等とならず保持性に優れた塗装を実現することができる。また、１回の塗布で高膜厚の塗装も実現可能であり、重ね塗りを最小限に止めるか無くすことができ、塗料使用量を必要最低限とすることができる。従って、第２の色の溶剤塗料の塗装作業を効率的に行うことができる。 It is possible to adopt a configuration in which the solvent paint of the second color having high viscosity is discharged and applied by the dispenser 8. By using a solvent paint having a high viscosity, it is possible to suppress paint pools, liquid drips, and even parting off. As a result, even when the second-color solvent paint is applied by spraying onto the sloped surface or curved surface of the wheel design surface having a three-dimensional shape, the paint does not drips or pools and realizes excellent coating performance. be able to. Further, it is possible to realize coating with a high film thickness by one-time application, and it is possible to minimize or eliminate repeated coating, and it is possible to minimize the amount of coating used. Therefore, the painting operation of the second color solvent paint can be efficiently performed.

加飾塗膜１３及びクリアトップコート塗膜１４の形成をウエット・オン・ウエット塗装で行い、その後、焼付け乾燥するものとする。これにより、吐出塗布後の加飾塗膜１３がクリアトップコート塗膜１４で覆われた状態で焼付け乾燥されるから描画された加飾塗膜１３が焼付け乾燥による変形等を抑えることができ、また、塗装工程を簡略且つ効率的に行うことができる。 The decorative coating film 13 and the clear top coat coating film 14 are formed by wet-on-wet coating, and then baked and dried. Accordingly, since the decorative coating film 13 after discharge coating is baked and dried while being covered with the clear top coat coating film 14, the drawn decorative coating film 13 can be suppressed from being deformed due to baking and drying. In addition, the coating process can be performed simply and efficiently.

次に、加飾部７における金属露出部１３ａの形成は、切削工具を用いて加飾塗膜１３の周囲等の塗膜を削ってホイール本体１０の母材金属を露出させることにより形成されるが、この場合、例えば、上記の加飾塗膜形成工程においてディスペンサーノズル８１を装着した同一の加工機９にて、ディスペンサーノズル８１とツール交換して切削工具を装着するか、ディスペンサーノズル８１とともに切削工具を装着することにより、切削工程（金属露出部１３ａの形成工程）を実施することができる。 Next, the formation of the metal exposed portion 13a in the decorative portion 7 is performed by shaving the coating film around the decorative coating film 13 using a cutting tool to expose the base metal of the wheel body 10. However, in this case, for example, in the same processing machine 9 equipped with the dispenser nozzle 81 in the above-mentioned decorative coating film forming step, a tool is exchanged for the dispenser nozzle 81 and a cutting tool is installed, or cutting is performed with the dispenser nozzle 81. The cutting step (the step of forming the metal exposed portion 13a) can be performed by mounting the tool.

例えば、加工機９に切削工具を装着して、ＮＣプログラムに基づいて切削工具を３軸又は５軸に動かし、ワーク（加飾塗膜１３形成後のホイール本体１０）Ｗの加工面と一定のクリアランスを保持して切削工具の移動ならびに切削範囲を制御しながら、金属露出部１３ａを形成することができる。このようにして、ディスペンサーノズル８１の可動の場合と同じく、切削工具を可動させることにより、加飾塗膜１３の周囲や塗装面内に切削加工を施して金属露出部１３ａを形成することも容易に行うことができる。また、金属露出部１３ａの形成に際して切削加工の工程が増えるものの、新たに専用設備は特に必要とせず、既設機械を用いる事も可能なため、効率的かつ最低限のコスト上乗せで優れた加飾が実現される。なお、金属露出部１３ａの形成は、ディスペンサーノズル８１とツール交換等する加工機９で実施することに限らず、ディスペンサー８とは別の切削加工機を用いて行うようにしてもよい。 For example, a cutting tool is attached to the processing machine 9, and the cutting tool is moved in three axes or five axes based on the NC program, and the machining surface of the workpiece (the wheel body 10 after the decorative coating film 13 is formed) W is fixed. The metal exposed portion 13a can be formed while maintaining the clearance and controlling the movement of the cutting tool and the cutting range. In this way, similarly to the case where the dispenser nozzle 81 is movable, by moving the cutting tool, it is also easy to form the metal exposed portion 13a by performing a cutting process on the periphery of the decorative coating film 13 or within the coating surface. Can be done. Further, although the number of cutting processes is increased when forming the exposed metal portion 13a, new dedicated equipment is not particularly required, and existing machinery can be used, so that it is efficient and excellent in decoration with a minimum cost. Is realized. The metal exposed portion 13a is not limited to be formed by the processing machine 9 for exchanging tools with the dispenser nozzle 81, but may be formed by using a cutting machine different from the dispenser 8.

（実施形態２）
図５（ｅ）に示すように、実施形態２の車両用ホイール１Ａでは、ホイール意匠面の加飾部７を設ける部位に予め凹部１５を設けるようにし、第２の色の加飾塗膜１３は、第１の色のベース色塗膜１２が形成されているホイール意匠面の凹部１５内に形成されるようにしたものである。この場合、３次元形状のホイール意匠面において凹部１５により第２の色の溶剤塗料を塗料溜りとし滲みだし等が防止されるから、第２の色の加飾塗膜１３がより精細且つ綺麗に設計どおりに形成され、しかも効率的に形成することができる。また、第２の色の加飾塗膜１３の周囲に金属露出部１３ａを形成する際、凹部１５周囲に切削加工を施し易く、この位置が旋盤で切削加工が可能であればマシニングセンタでの切削加工よりも効率的且つ短時間で容易に金属露出部１３ａを形成することができる。従って、加飾部７を効率的に且つ短時間で容易に形成することができる。 (Embodiment 2)
As shown in FIG. 5(e), in the vehicle wheel 1A according to the second embodiment, the recessed portion 15 is provided in advance at a portion of the wheel design surface where the decorative portion 7 is provided, and the decorative coating film 13 of the second color is formed. Is formed in the recess 15 of the wheel design surface on which the base color coating film 12 of the first color is formed. In this case, since the concave portion 15 prevents the solvent paint of the second color from being used as a paint pool and oozing out, etc. on the wheel design surface of the three-dimensional shape, the decorative coating film 13 of the second color becomes finer and more beautiful. It is formed as designed and can be formed efficiently. Further, when the metal exposed portion 13a is formed around the second color decorative coating film 13, it is easy to perform the cutting work around the recessed portion 15. If this position can be cut by the lathe, the cutting at the machining center is possible. The metal exposed portion 13a can be formed more efficiently and easily in a shorter time than processing. Therefore, the decorative portion 7 can be efficiently and easily formed in a short time.

図５を参照して、例えば、旋盤でスポーク５天面に切削加工を施す場合、この旋盤による切削加工を行うスポーク５天面に加飾塗膜１３を設けるに際して、ホイール意匠面にプライマー塗膜１１を形成した後、当該加飾塗膜１３の形成部位を切削して凹部１５を形成し（図５（ａ）参照）、このホイール意匠面に第１の色のベース色塗膜１２を形成し（図５（ｂ）参照）、次に、凹部１５内の全体に第２の色の加飾塗膜１３を形成した後（図５（ｃ）参照）、このスポーク５天面を旋盤で切削加工することにより、スポーク５天面に光輝面の金属露出部１３ａが形成されるとともに金属露出部１３ａの範囲中の凹部１５に第２の色の加飾塗膜１３を残すことができる（図５（ｄ）参照）。この後、ホイール意匠面にクリア塗料を塗装してクリアトップコート塗膜１４を最上層に形成する（図５（ｅ）参照）。 With reference to FIG. 5, for example, when cutting the top surface of the spoke 5 with a lathe, when providing the decorative coating film 13 on the top surface of the spoke 5 to be cut with this lathe, a primer coating film is provided on the wheel design surface. After forming 11, the concave portion 15 is formed by cutting the formation portion of the decorative coating film 13 (see FIG. 5A), and the base color coating film 12 of the first color is formed on the wheel design surface. (See FIG. 5(b)), and after forming the decorative coating film 13 of the second color on the entire inside of the recess 15 (see FIG. 5(c)), the top surface of the spokes 5 is turned by a lathe. By cutting, the metal exposed portions 13a of the bright surface are formed on the top surfaces of the spokes 5 and the decorative coating film 13 of the second color can be left in the recesses 15 in the range of the metal exposed portions 13a ( See FIG. 5D). Then, a clear paint is applied to the wheel design surface to form a clear top coat coating film 14 on the uppermost layer (see FIG. 5(e)).

この例では、スポーク５の天面において、凹部１５内には、スポーク５側面などのベース色部６におけるベース色塗膜１２の第１の色とは別の加飾塗膜１３の第２の色と、この加飾塗膜１３の輪郭に沿ってベース色塗膜１２の膜厚分の第１の色とが現れ、一方、凹部１５周囲には、金属露出部１３ａによる光輝面が現れるという多彩な加飾部７を容易に作製することが可能であると同時に、ホイール意匠面の意匠性を更に向上することができる。
なお、実施形態２において、上述以外の構成及び加飾方法は、実施形態１と同様である。 In this example, in the recess 15 on the top surface of the spoke 5, the second color of the decorative coating film 13 different from the first color of the base color coating film 12 in the base color portion 6 such as the side surface of the spoke 5 is provided. The color and the first color corresponding to the film thickness of the base color coating film 12 appear along the contour of the decorative coating film 13, while the bright surface due to the metal exposed portion 13a appears around the recess 15. A variety of decorative parts 7 can be easily manufactured, and at the same time, the design of the wheel design surface can be further improved.
In addition, in the second embodiment, the configuration and the decoration method other than those described above are the same as those in the first embodiment.

なお、本発明は、上記実施形態に限定されず、本発明の要旨の範囲内で種々変更を施すことが可能である。
例えば、上記実施形態では、第２の色の溶剤塗料の描画形成に用いるディスペンサーノズル８１や金属露出部１３ａの形成に用いる切削工具を加工機９に取り付ける構成とするが、ディスペンサーノズル８１や切削工具を多関節ロボット又は多軸アームを備える機械等によりＮＣプログラムに基づいて３次元的に移動可能な構成としてもよい。 It should be noted that the present invention is not limited to the above embodiment, and various modifications can be made within the scope of the gist of the present invention.
For example, in the above embodiment, the dispenser nozzle 81 used for drawing and forming the solvent paint of the second color and the cutting tool used for forming the metal exposed portion 13a are attached to the processing machine 9, but the dispenser nozzle 81 and the cutting tool are used. May be three-dimensionally movable based on the NC program by a multi-joint robot, a machine equipped with a multi-axis arm, or the like.

金属露出部１３ａを形成する切削加工前に、第１の色のベース色塗膜１２と第２の色の加飾塗膜１３を、例えば透明なクリア塗料で塗装してクリアコート塗膜で覆うようにすることが好ましい。すなわち、切削加工を行う場合、塗膜と金属露出部１３ａの界面において塗膜の欠けや割れ、また切削屑により傷が生じやすく、この欠け等が外観上目立ちやすいが、金属露出部１３ａを形成する切削加工前に第１の色のベース色塗膜１２と第２の色の加飾塗膜１３をクリアコート塗膜で覆うことで、ベース色塗膜１２や加飾塗膜１３の欠けや割れ、傷等の発生を防止することができ、また、被覆のクリアコート塗膜により耐食性を高めることができる。なお、この場合、切削加工により被覆のクリアコート塗膜に欠け等が生じ得るが、透明ゆえに最上層のクリアトップコート塗膜１４の形成により外観上目立つことはない。 Before the cutting process for forming the exposed metal portion 13a, the base color coating film 12 of the first color and the decorative coating film 13 of the second color are coated with, for example, a transparent clear paint and covered with the clear coat paint film. It is preferable to do so. That is, when cutting is carried out, cracks or cracks in the coating film at the interface between the coating film and the metal exposed portion 13a and scratches are likely to occur due to cutting debris. Before the cutting process, the base color coating film 12 of the first color and the decorative coating film 13 of the second color are covered with the clear coating film, so that the base color coating film 12 and the decorative coating film 13 are not damaged. It is possible to prevent the occurrence of cracks, scratches, etc., and it is possible to enhance the corrosion resistance by the clear coat coating film of the coating. In this case, chipping or the like may occur in the coating clear coat coating film due to the cutting process, but because of the transparency, it does not stand out in appearance due to the formation of the clear top coating film 14 as the uppermost layer.

１，１Ａ車両用ホイール
２リム部
３ディスク部
４ハブ穴
５スポーク
６ベース色部
７，７ａ加飾部
８ディスペンサー
９加工機
１０ホイール本体
１１プライマー塗膜
１２ベース色塗膜
１３加飾塗膜
１３ａ金属露出部
１４クリアトップコート塗膜
１５凹部
８１ディスペンサーノズル
９１工具ホルダー
９２テーブル
Ｗワーク
1,1A Vehicle wheel 2 Rim section 3 Disc section 4 Hub hole 5 Spoke 6 Base color section 7, 7a Decorative section 8 Dispenser 9 Processing machine 10 Wheel body 11 Primer coating 12 Base color coating 13 Decorative coating 13a Exposed metal 14 Clear top coat coating film 15 Recess 81 Dispenser nozzle 91 Tool holder 92 Table W work

Claims

A wheel body made of a metal material is provided with a rim and a disc having a plurality of spokes, and a wheel design surface of a three-dimensional shape that is visible from the outside when mounted on a vehicle is painted in multiple colors to form a base color portion and a decoration portion. A vehicle wheel having:
The base color portion has a base color coating film of the first color formed by the solvent paint of the first color on the entire wheel design surface,
The decorative part is a decorative coating film of a second color formed by drawing a solvent paint of a second color different from the first color on a part of the base color coating film of the first color, and a wheel. And a metal exposed portion where the base metal of the main body is exposed,
The metal exposed portion of the decorative portion is the base color coating film of the first color or the base color coating film of the first color so as to surround the entire periphery of the second color decorative coating film. A form in which the coating film in the laminated portion with the decorative coating film of the second color is cut, and /or a part of the decorative coating film of the second color is coated with the base color coating film of the first color A vehicle wheel that is formed by cutting and cutting .

The vehicle wheel according to claim 1,
The second color decorative coating film is a vehicle wheel that is formed in a recess of the wheel design surface on which the first color base color coating film is formed.

The vehicle wheel according to claim 1 or 2,
The decorative coating film of the second color is a vehicle wheel in which a predetermined design is drawn and formed in a dot shape, a linear shape, or a planar shape with the solvent paint of the second color.

The vehicle wheel according to any one of claims 1 to 3,
A vehicle wheel having a base color coating film of a first color, a decorative coating film of a second color, and a clear topcoat coating film formed of a clear coating on the uppermost layer above the exposed metal portion.

In a vehicle wheel including a rim as a wheel body made of a metal material and a disc having a plurality of spokes, a three-dimensional wheel design surface that is visible from the outside when mounted on a vehicle has a multicolored base color portion and a decorative portion. It is a decoration method to paint differently,
A step of applying a solvent paint of a first color to the entire wheel design surface after applying a base coating that also serves as anti-corrosion and leveling to form a base color coating film of the first color to be the base color portion. When,
A second color different from the first color is controlled by moving the dispenser in each direction of three axes or five axes according to the NC program along the wheel design surface to control both the feed speed and the paint discharge amount. A step of forming a decorative coating film of a second color, which is a part of the decorative portion, by applying a solvent paint in a dot jet manner and drawing a predetermined design;
The coating film of the portion of the base color coating film of the first color or the base color coating film of the first color and the decoration coating film of the second color so as to surround the entire periphery of the decorative coating film of the second color And /or a part of the decorative coating film of the second color with the base color coating film of the first color is cut to form the mother film of the wheel body. Exposing the material metal to form an exposed metal portion that becomes a part of the decorative portion;
A method for decorating a vehicle wheel having: