JPH05311394A - Production of ornamental member - Google Patents

Abstract

PURPOSE:To provide an ornamental member obtained by coating an alloy base material difficult to wet-etch with a colored film by a dry process and having engraved letters and/or patterns. CONSTITUTION:Letters and/or patterns are engraved on the selected part on a base material of gold or gold alloy by laser beam machining and coated with a colored film by a dry process. As a result, the ornamental member has two colors, i.e., the color of the coating film and the color of the base material not coated with the film.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative member having a multicolored outer appearance such as exterior parts for watches, eyeglass parts, and a lighter case, and a manufacturing method thereof.

[0002]

SUMMARY OF THE INVENTION The present invention relates to a concave character and / or a gold or gold alloy material coated with a colored film by a dry film forming method.
Another object of the present invention is to provide a decorative member having a pattern, which has a high decorative value and is excellent in corrosion resistance, adhesion, and abrasion resistance, stable in quality, and inexpensive.

[0003]

2. Description of the Related Art A conventional method for producing a multicolored product by changing the appearance color tone of a concave pattern and / or a character portion and the other surface of a decorative member such as a watch exterior part is previously formed in a concave shape. Wet plating such as gold plating is applied to the entire surface of the material such as SUS having the printed pattern and / or characters, the pattern or the character part is printed using the masking paint for plating, and then the wet plating other than the masking part is peeled and removed. , A method to further remove the masking paint.

As in Japanese Patent Laid-Open No. 64-75660, a concave pattern previously formed on a metal material by pad printing or screen printing is printed on a portion other than letters, and then a film is formed by an ion plating method, A method in which the metal surface is multicolored by peeling off the printed film.

As disclosed in Japanese Laid-Open Patent Publication No. 61-117269, after forming a plating layer of nickel plating or copper plating or its alloy on the entire surface of the substrate, an organic resist is applied to portions other than concave portions which do not require dry plating, and baking and curing are performed to form a plating layer. Is removed by dissolving, then the organic resist is removed by dissolving,
Then, after forming a dry plating layer, the plating layer is dissolved and removed. Is common.

[0006]

However, the above-mentioned prior art has the following drawbacks. In this method, the design point, the character part is wet-plated and the coating hardness is as low as Hv200-300, so the pattern in the recess is large, and the character is susceptible to abrasion or scratches. There is a major defect as an ornamental product in that the appearance of patterns and characters is significantly deteriorated due to scratches and abrasion.

In the method of (1), since the temperature of the substrate surface rises due to the effect of radiant heat due to the dissolution of evaporated metal during the ion plating process, the gas contained in the masking or the decomposition gas of the masking is released as the gas during the ion plating process. Occurs, which adversely affects the formation of the ion plating film and causes interference color and color unevenness of the film, or discharge and poor adhesion. Moreover, the outer peripheral portion of the masking is likely to be chipped or peeled off, and the intended appearance is easily damaged. Therefore, the yield rate is extremely low, mass productivity is poor, and the cost is increased.

In the method (1), over-etching under the resist film occurs when the plating layer such as the nickel plating layer is peeled off after the resist is applied. Further, the heat generated during the dry plating causes nickel, copper, or an alloy thereof to thermally diffuse on the substrate surface, causing discoloration of the substrate surface. Further, it takes a long time to remove and remove the plating layer such as the nickel plating layer after the dry plating, and there is a drawback that the working efficiency is poor.

Further, in the methods (1) to (3), the concave pattern or character is generally etched, but it has a drawback that it is limited to materials such as zinc alloy, copper alloy, and iron alloy. It was Furthermore, since a masking step at the time of etching and a masking step at the time of dichroicing the recess and other parts are required, there are many defects such as positional deviation, and the defect rate is extremely low.

The present invention is intended to solve such a problem, and an object thereof is to improve the non-defective rate by eliminating the masking step and to reduce the cost, and gold or gold alloys or the like, which are conventionally concave patterns or characters by etching. Even if it is difficult to form a material, a complicated concave pattern and / or letters are formed, and the concave portion is colored, and the decoration has a high decorative value with excellent adhesion, corrosion resistance, scratch resistance, and abrasion resistance. A member and a method for manufacturing the member are provided.

[0011]

The decorative member of the present invention is characterized in that it has concave characters and / or patterns in which a colored film is coated on a material surface of gold or a gold alloy by a dry film-forming method, After coating a colored film as a first layer on the surface of the material by a dry film forming method, a concave character and / or pattern is formed at a depth exceeding the film thickness of the first layer by selective laser processing on a predetermined portion. After that, as a second layer, a colored film having a different component from that of the first layer is coated and laminated, and then the first layer and the second layer other than the character and / or the pattern portion are peeled off and finished by etching. And

[0012]

According to the above-mentioned constitution of the present invention, a dry film forming method which is excellent in scratch resistance and abrasion resistance as a final finish at a design point portion as a decorative article of a pattern or a character portion having a concave surface Has formed a hard coating with
The design and letters, which are the appealing points of the decoration, can be maintained for a long time by carrying it without losing the appearance of the product. Furthermore, it is possible to secure the adhesion of the colored coating on the gold or gold alloy material, and it is possible to easily obtain the concave color tone variety.

Next, a method for manufacturing the decorative member of the present invention will be described. By coating a colored coating on the material as the first layer by the dry film formation method, the entire surface of the member is masked with a hard coating, so that the surface of the component is prevented from being burnt or scratched in the next laser processing step. It becomes possible to do. In the step of coating a colored film with a component different from that of the first layer after laser processing, the concave pattern or character portion formed by laser processing is generally performed because the gold or gold alloy substrate is exposed. Similar to the dry film-forming method on the top, a coating structure with good adhesion is possible. By laminating films with different components by the dry film forming method on the first layer and the second layer, since the film by the dry film forming method generally has many pinholes, the pinholes of the second layer film are used in the subsequent process. The peeling liquid for the first layer permeates, the first layer coating is peeled off, and at the same time, the second layer coating on the portions other than the recesses is listed and can be easily peeled off. At this time, since the composition of the second layer coating in the concave portion is different from that of the first layer coating, there is no deterioration in adhesion and appearance due to the stripping solution for the first layer. Next, as a colored film by the dry film method, Ti, Zr, H
C containing f, V, Nb, Ta, Cr, W and the like as main components,
A compound with at least one component of N, O, or a noble metal or alloy such as Au, Pt, Pd, or Ag can be applied. As a dry film forming method, a PVD method such as a vacuum evaporation method, a sputtering method, an ion plating method, or a CV method.
Method D can be applied. Hereinafter, the present invention will be described based on examples.

[0014]

【Example】

[Embodiment 1] FIGS. 1 (a) to 1 (d) are cross-sectional views in each manufacturing process of a watch case made according to the present invention. First, the gold alloy (Au 75% -Ag 15% -Cu) shown in FIG.
The watch case 1 made of 10% material is attached to the vacuum chamber of the ion plating apparatus, the vacuum chamber is evacuated, and then Ar gas of 10 Pa is applied to the substrate before the step of ion plating the watch case. Ion bombardment was performed at an applied voltage of 0.5 KV to clean the surface of the watch case. Next, Ar gas was discharged and the inside of the vacuum chamber was returned to 3 × 10 ⁻² Pa. Then, N ₂ gas was introduced up to 6 × 10 ⁻² Pa as a reactive gas, and a substrate voltage of 0.1 KV was applied to generate plasma. At the same time, metallic Cr is heated and evaporated by an electron beam heating method to form a stainless steel CrN coating film 2 which is a compound of Cr and N.
0 μm coated. Next, as shown in FIG. 1B, a concave character was marked by laser processing at a predetermined portion at a depth exceeding the CrN film thickness. For this reason, the gold alloy material is exposed on the surface of the laser-processed character 3. In the laser processing, a commercially available Nd = YAG laser device (wavelength 1.06 μm) is used, output 100 W, pulse width 10 m
Processing was performed under the condition of s. Next, as shown in FIG. 1C, blue TiO ₂ using Ti as an evaporation source and O ₂ gas as a reaction gas is formed on the entire surface of the watch case in the state of FIG. 1B by the same ion plating method as described above. Coating 4 1.0μ
m coated.

Next, the watch case in the state shown in FIG. 1 (c) was immersed in an aqueous sodium carbonate solution, and the watch case was used as an anode to apply a direct current of 5 V to remove the CrN film 2 by etching. At this time, the TiO film 4 on the CrN film 2 is also listed and removed at the same time, and finally, as shown in FIG. 1D, a blue color appearance due to the TiO film 4 appears on a predetermined portion of the gold alloy watch case 1. A gold alloy watch case was obtained in which concave characters were applied and the other two-color appearance of the gold alloy material color was exhibited. The gold alloy watch case manufactured by this method is
Artificial sweat corrosion resistance test (40 ° C x 90% humidity x 48 hours),
Artificial seawater (40 ° C x 90% humidity x 48 hours), bending test (180 ° bending), heat shock test (300
° C x 10 minutes heating → rapid cooling in water, repeated 5 times), wear resistance test (500g load on cowhide applied to watch case, 5
The two-color boundary part of the watch case is rubbed with a cm stroke for 30,000 times), and a scratch resistance test (20 times repeated from 1 m on the vinylite) is performed. All the above test results are corrosion resistance, adhesion, and resistance as a watch case. The abrasion resistance and the scratch resistance were sufficiently satisfied. [Embodiment 2] FIGS. 2 (a) to 2 (d) are cross-sectional views of a watch case at each manufacturing step of the embodiment of the present invention.

First, as shown in FIG. 2 (a), pure gold (2
The entire surface of the watch case 5 made of 4K) was coated with the CrNC coating 6 by ion plating to a thickness of 0.5 μm. Next, as shown in FIG. 2B, a concave pattern 7 is formed on a predetermined portion of the watch case by laser processing under the same conditions as in Example 1.
Formed. Next, as shown in FIG. 2 (c), a black-brown TiNC coating 8 is formed on the entire surface by ion plating.
5 μm coated. Next, the watch case in the state of FIG. 2C was immersed in an aqueous sodium carbonate solution, and the watch case was used as an anode to apply a direct current of 5 V to remove the CrNC film 6 by etching. At this time, the TiNC film 8 on the CrCN film 6
Was also listed and removed at the same time. As a result, as shown in FIG. 2 (d), a watch case having a two-color appearance in which a concave pattern with a TiNC coating that exhibits a black-brown color and a pure gold color is used is formed on a predetermined portion of the surface of the pure gold watch case. .. As a result of a quality test similar to that of [Example 1], the watch case was able to sufficiently satisfy the corrosion resistance, wear resistance and scratch resistance as the watch case.

[0017]

As described above, according to the present invention, a gold or gold alloy material is coated with a colored film as a first layer by a dry film forming method, and then a concave pattern or a concave pattern is selectively formed on a predetermined portion by laser processing. It is a drawback of the conventional method that a character is formed, then a dry film forming method is applied as a second layer to form a colored film having a component different from that of the first layer film, and then the first layer film is removed by etching. The deterioration of appearance quality and the increase in cost are improved, and a concave pattern or letters having a desired color such as a complicated shape is formed on the surface of the decorative member, and the other part has a two-color appearance in which the material color is finished,
It has become possible to provide a decorative member having a high decorative value with stable quality and at low cost. When applied, it can be applied to not only exterior parts for watches such as dials for hands, hands and bands, but also all decorative parts such as eyeglass frames, lighters, tie pins, and accessories.

[Brief description of drawings]

FIG. 1 is a sectional view showing each manufacturing process of an embodiment of a timepiece exterior component according to the present invention.

FIG. 2 is a sectional view showing each manufacturing process of the embodiment of the timepiece exterior component according to the present invention.

[Explanation of symbols]

 1 Gold alloy (Au 75% -Ag 15% -Cu 10%) 2 CrN coating 3 Laser processing letters 4 Blue color TiO coating 5 Solid gold (24K) 6 CrNC coating 7 Laser processing pattern 8 Black brown TiNC coating

Claims (2)

[Claims] 1. A decorative member having a concave character and / or pattern formed by coating a colored film on a surface of a gold or gold alloy material by a dry film forming method. 2. A surface of the material is coated with a colored film as a first layer by a dry film forming method, and then selectively selected portions are subjected to laser processing to form concave characters and a depth to a depth exceeding the film thickness of the first layer. / Or a pattern is formed, and then, as a second layer, a colored film having a component different from that of the first layer is formed by a dry film forming method, and then the first layer and the second part other than the characters and / or the pattern part are formed by etching. The method for producing a decorative member according to claim 1, wherein the layer is peeled off and finished.