JPH05320869A - Production of multicolored ornament - Google Patents

Abstract

PURPOSE:To freely produce a multicolored ornament having a complex design by subjecting the surface of a metallic ornament to dry plating and laser beam machining through a metal mask. CONSTITUTION:An electric conductive color coating film 2 is formed on the surface of a metallic ornament 1, then, a metal mask 3 is formed on the film 2 and the film 2 is finely patterned by laser beam machining through the mask 3. An ornamental coating film 4 different from the film 2 in hue is then formed and the mask 3 is removed. A multicolored fine pattern can freely be formed on the surface of the metallic ornament.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for multicoloring ornaments made of metal such as exterior parts for watches and eyeglass frames.

[0002]

2. Description of the Related Art Conventionally, a method of multicoloring a surface of a decorative article made of metal by dry plating is a method of forming a colored film on the surface of a decorative article made of metal by dry plating, and then forming an organic layer on the surface of the colored film. A pattern is formed by a mask, and a colored coating having a color tone different from that of the colored coating is formed on the surface by dry plating again. After that, the organic mask and the colored film on the organic mask are removed by an organic solvent or the like to make multicolor.

[0003]

However, in the conventional method, an organic mask is used to form a coating pattern by hand using a brush or the like on the surface of the colored film-formed decorative article, and then the colored film is formed by dry plating. Since a colored film having a different color tone is formed, it is impossible to form a fine and complicated pattern as a design. In addition, since the colored film is formed in vacuum, gas is generated from the organic mask, and discoloration of the colored film sometimes occurs. SUMMARY OF THE INVENTION An object of the present invention is to provide a method for producing a multicolor ornamental product which eliminates the above problems, can easily form a fine and complicated pattern, and has a multicolor coating without discoloration.

[0004]

Means for Solving the Problems The constitution of the present invention is to form a conductive colored film on a surface of a decorative article made of metal by dry plating, and to form copper, nickel by dry plating or wet plating on the surface of the colored film. Forming a metal mask with one of chrome, and performing laser processing from above the metal mask to remove a part of the metal mask and the colored coating to expose the surface of the ornament, and further A decorative coating having a color tone different from that of the colored coating is formed on the surface of the decorative article, and then the metal mask is dissolved with a chemical to form the colored coating and the decorative coating on the surface of the decorative article.

[0005]

Embodiments of the present invention will be described in detail below with reference to the drawings.
1 to 5 show a manufacturing process according to the present invention, and FIG.
Sectional view of a metal decorative article having a conductive colored coating, FIG.
3 is a cross-sectional view of a metal decorative product in which a metal mask is formed on the conductive colored film of FIG. 1, FIG. 3 is a cross-sectional view of the metal decorative product shown in FIG. 2 which is laser-processed, and FIG. FIG. 5 is a cross-sectional view of the metal decorative article on which the film is formed, and FIG. 5 is a cross-sectional view of the metal decorative article completed by peeling off the metal mask of FIG.

The metal ornament 1 is a watch side, a band, glasses or the like, and the material thereof is a stainless material, a titanium material, a titanium alloy material or the like. After washing the metal ornament 1, the metal ornament 1 is mounted in a vacuum tank of an ion plating apparatus which is dry plating. After exhausting the inside of the vacuum chamber, argon gas was introduced, the pressure was set to 5 × 10 ⁻⁵ Torr, a voltage of −50 V was applied to the metal ornament 1, and the surface of the metal ornament 1 was ionized with argon gas ions. Do bombard cleaning. Next, the inside of the vacuum chamber is maintained at 5 × 10 ⁻³ Torr, and nitrogen gas is introduced as a reaction gas as a mixed gas with argon gas. Then, an evaporation source of metallic titanium is irradiated with an electron beam at an appropriate accelerating voltage to vaporize the titanium, and the titanium vapor and the mixed gas are ionized and reacted by an ionization mechanism provided in the vacuum chamber, so that the metal ornament 1 A conductive color coating 2 having a gold color tone is formed on the surface of with a thickness of 1 μm. (Fig. 1)

Next, as shown in FIG. 2, a metal mask 3 is formed on the surface of the conductive colored film 2 by one of copper, nickel and chromium by dry plating or wet plating.

When the metal mask 3 is formed by dry plating, the metal ornament 1 having the conductive colored coating 2 is mounted in the vacuum tank of the ion plating apparatus, the interior of the vacuum tank is evacuated, and then argon gas is introduced. Pressure is 5 × 10 ^-5 To
Then, the metal evaporation source is irradiated with an electron beam at an appropriate accelerating voltage and vaporized to form a metal mask 3 on the conductive colored film 2 of the metal ornament 1 with a film thickness of 1 μm. Any of copper, nickel, and chromium is used as the metal evaporation source.

When the metal mask 3 is formed by wet plating, the metal ornament 1 is set on the jig and then washed, and one is selected from copper sulfate plating, bright nickel plating, and chrome plating, and the conductive colored Metal mask 3 on the surface of coating 2
Is formed with a film thickness of 1 μm.

Next, the surface of the metal mask 3 of the metal ornament 1 is irradiated with a laser beam 5 having an output of 14 to 20 w and a bite size of 40 μm by YAG laser processing, and a pattern is drawn according to a certain pattern to be electrically conductive with the metal mask 3. The color coating 2 is removed, a pattern is formed on the metal ornament 1 as shown in FIG. 3, and the surface of the metal ornament 1 is exposed.

After that, the metal ornament 1 is washed and burnt off by laser processing, and then mounted again in the vacuum tank of the ion plating apparatus which is dry plating. After evacuating the inside of the vacuum chamber, introducing argon gas, the pressure is 5 × 10 ⁻⁵ T
Orr, a voltage of -50 V is applied to the metal ornament 1, and the surface of the metal ornament 1 is ion bombarded cleaned with argon ions.

Next, the inside of the vacuum chamber is maintained at 5 × 10 ^-3 Torr, and acetylene gas is introduced as a reaction gas as a mixed gas with argon gas. After that, the evaporation source of metallic titanium is irradiated with an electron beam at an appropriate accelerating voltage to vaporize titanium, and the titanium vapor and the mixed gas are ionized and reacted by the ionization mechanism provided in the vacuum chamber, as shown in FIG. In this manner, a gray-colored decorative coating 4 having a film thickness of 1 μm is formed on the surface of the metal ornament 1 and the surface of the metal mask 3.

Next, the metal mask 3 is peeled off. When the metal mask 3 is copper or nickel, it is peeled off with a commercially available Enstrip 92 (manufactured by Meltex Co., Ltd.). When the metal mask 3 is nickel, it can be peeled off with a commercially available Enstrip NP (manufactured by Meltex Co., Ltd.). When the metal mask 3 is chromium, peeling is performed with a commercially available Enstrip CR-5 (manufactured by Meltex Co., Ltd.). Table 1 shows detailed peeling conditions of copper, nickel, and chromium that can be used for the metal mask 3.

[0014]

[Table 1]

By peeling the metal mask 3 under the above peeling conditions, the decorative coating film 4 formed on the surface of the metal mask 3 is also peeled off, and the surface of the metal decorative article 1 is gold-colored as shown in FIG. The metal decorative article 1 having a multicolor (two colors) of the conductive colored coating 2 and the gray-colored decorative coating 4 is completed. By changing the ion plating conditions, it is possible to obtain two-tone colors.

Although the coating is formed by ion plating in the examples, the coating may be formed by dry plating such as sputtering. Further, the surface of the metal decorative article 1 made in the example had two colors, but by repeating the formation of the metal mask 3, the laser processing, the formation of the decorative coating 4 and the peeling of the metal mask 3 several times. , Metal ornaments 1
It is possible to make the surface of the multicolored (two or more colors).

[0017]

As described above, according to the present invention, a combination of a coating formed by dry plating, a metal mask, and laser processing provides a multicolored decoration having a multicolored coating with high quality and good appearance on the surface. Goods can be made relatively easily. Moreover, since the pattern is created by laser processing, it is possible to freely create a complicated and multi-colored film pattern, and it is possible to expand design variations. Further, since the metal mask is used, discoloration of the decorative coating or the colored coating does not occur.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a metal decorative article on which a conductive colored film is formed according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a metal ornament on which a metal mask is formed according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view of a metal decorative article that is laser-processed in an example of the present invention.

FIG. 4 is a cross-sectional view of a metal decorative article having a decorative coating formed according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view of a metal ornament completed in an example of the present invention.

[Explanation of symbols]

 1 Metal ornaments 2 Conductive colored film 3 Metal mask 4 Decorative film 5 Laser beam

Claims (1)

[Claims] 1. A conductive colored coating is formed on the surface of a metallic ornament by dry plating, and a metal mask is formed on the surface of the colored coating by one of copper, nickel and chromium by dry plating or wet plating. Formed, by laser processing from above the metal mask, a part of the metal mask and the colored coating is removed to expose the surface of the ornament,
Further, a decorative coating having a color tone different from that of the colored coating is formed on the surface of the decorative article, and then the metal mask is dissolved by a chemical to form the colored coating and the decorative coating on the surface of the decorative article. And a method of manufacturing a multicolor ornament.