JPS6152391A - Ornament - Google Patents

Abstract

PURPOSE:To obtain a multicolored ornament having a three-dimensional pattern at a low cost by patterning the surface of Al or an Al alloy as a base metal with anodic oxide films and paint films. CONSTITUTION:A resist is patternwise applied to an Al or Al alloy material 3 for a case for a wrist watch, and anodic oxide films 1 of about 20mum thickness are formed on the material 3 in a sulfuric acid bath. The resist is removed, the films 1 are treated to seal the pores, and golden paint films 2 of about 40mum thickness are formed on the exposed parts on which a pattern is formed with golded paint for electrodeposition. Thus, a golden relief pattern having metallic luster is formed on the silver-white background, and a case for a wrist watch having a high ornamental value and satisfactory corrosion resistance is obtd. The ornamental value can be further increased by electrolytically coloring the anodic oxide films 1.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to ornaments such as watch exterior parts and accessories having decorative patterns.

[Conventional technology]

Conventionally, in the case of decorative articles, there has been a technique that fully applies partial plating as a technique for completely forming decorative patterns on the surface. (For example, in the case of aluminum or aluminum alloy (hereinafter referred to as aluminum or aluminum alloy), an anodic oxide film is formed, and dyeing or electrolytic coloring is used to partially I can think of a way to do all the coloring.

[Problem that the invention seeks to solve]

The above conventional technology has the following problems.

Regarding the technique of partial plating, first plating the entire surface of the decorative item, then forming a resist tf on all areas other than the area where the entire decoration is to be applied, or using all the partial plating equipment for decoration. In this case, the effect of the plating that is done for decoration is to stand out, but when decorating with plating, considering corrosion resistance, the type of plating that can be used is a golden color. Gold or gold alloy plating, silver-white rhodium, and palladium plating are the only options available, and there is a problem in that the expression of color tone is insufficient, and there is also a problem in terms of cost when using all gold plating.

Furthermore, the method using an anodic oxide film on aluminum expands the expression of color tones, but has the problem that it is difficult to express only relatively flat patterns.

The object of the present invention is to eliminate all of the drawbacks of the prior art, provide a complete decorative article with decorative patterns that has a variety of color expressions, is capable of three-dimensional patterns, and is low cost.

[Means for Solving the Problems] In order to solve all of the above problems, the present invention uses aluminum or an aluminum alloy as a whole base material, and partially coats the surface with an anodized coating.
The entire pattern was formed using the remaining paint film, and the entire decorative item with the decorative pattern was created.

[For production]

In the decorative article constructed as described above, not only can the color expression be completely diversified by the coating film, but also the color tone can be expressed by dyeing or electrolytically coloring the anodic oxide film. . In addition, the paint film can be made thicker than the anodic oxide film by electrodeposition, etc., to create a three-dimensional pattern.

[Example 1] After forming a resist on the entire pattern-forming portion of a wristwatch case material 3 made of aluminum alloy (5052 material), a 20 micron anodic oxide film 1 was formed using a sulfuric acid bath. Next, after removing the resist, a sealing process is performed, and then a gold electrodeposition coating liquid (anionic ILT coating liquid,
A 40 micron gold coating film (manufactured by Shimizu Shoji) was formed on the entire area where the pattern was to be formed. The case thus obtained had a beautiful golden embossed pattern on a silver-white base, had high decorative value, and had good corrosion resistance. (Figure 1, Figure 2) Here, by fully utilizing electrocoating as the coating film, the metallic luster of the base is not lost due to the transparent coating film originally possessed by electrocoating, and the metallic luster is maintained. It is said that a case with a certain pattern can be produced.The effect was also obtained.

[Example 2] A 20 micron anodic oxide film 4 was formed on a watch dial material 6 made of aluminum alloy (2021 material) in a sulfuric acid bath, and a black film was obtained by dyeing, followed by puncturing. Next, some of the coatings were fully opened through machining to form a pattern that completely exposed the aluminum alloy base, and after cleaning,
A 20 micron gold coating film 2 was entirely formed using a gold electrodeposition coating solution (same as in Example 1), yielding a beautiful gold dial with metallic luster on a black background. This dial had a low decorative value and was of sufficient quality as a dial.

(Figures 3 and 4) [Effects of the Invention] As described above, the present invention provides a variety of color tones by forming an anodized film on a part of the aluminum or aluminum-associated surface and a coating film on the rest of the surface. It becomes possible to provide decorative items that can be expressed as well as have a three-dimensional effect. Furthermore, since gold is not used, it is possible to provide low-cost ornaments.

In this example, all dyeing was used to color the anodic oxide film, but it goes without saying that the same effect can be obtained by using electrolytic coating. However, the same effect is obtained in 9 cases, and it is natural that these color tones are not considered in the examples.

Furthermore, although the present embodiment has been described with respect to a case and a dial, the effects are not limited thereto, and can also be applied to other watch exterior parts and accessories.

[Brief explanation of the drawing]

Fig. 1 is a plan view of the case of Embodiment 1 of the present invention, Fig. 2 is a sectional view taken along line A-A', Fig. 6 is a plan view of the dial of Embodiment 2 of the invention, and Fig. 4 is its sectional view. This is a sectional view taken along B-B'.

Claims (3)

[Claims] (1) A decorative product made of aluminum or an aluminum alloy, characterized in that a pattern is formed on the surface of the product, with a part of the surface being anodized film and the rest being a painted film. (2) The decorative article according to claim 1, wherein the anodic oxide film is colored by dyeing or electrolytic coloring. (3) The decorative article according to claim 1, wherein the coating film is an electrodeposition coating.