JP6715009B2 - Vehicle wheel and vehicle wheel decoration method - Google Patents

Description

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.

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.

Japanese Patent Application No. 2014-137723 Japanese Patent Application No. 2014-137724 JP, 2010-158981, A

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.

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.

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 .

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.

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.

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.

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.

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.

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.

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.

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.

1 is a front view showing the external appearance of a vehicle wheel according to Embodiment 1. FIG. FIG. 3 is an enlarged front view of the decorative portion of the vehicle wheel of the first embodiment. It is a schematic diagram which shows the coating film formation process in a wheel design surface. It is a schematic diagram which shows the structure of the dispenser used for formation of a 2nd color decorative coating film. 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.

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.

(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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

(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.

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)).

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.

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.

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 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 (5)

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:

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