JPH06256993A - Ornamental parts and their production - Google Patents

Abstract

PURPOSE:To make it possible to easily insert high-quality characters, patterns, etc., into an ornamental surface to be anodized and to form the ornamental surface to plural color tones even if this surface is a curved surface. CONSTITUTION:A watch case (ornamental parts) 1 is formed of a blank material consisting of aluminum or its alloy and this ornamental surface 2 is subjected to an anodizing treatment to form a primary anodized layer (corrosion resistant oxidized film) 4 and thereafter, recessed parts 3, such as characters and patterns, are formed by laser beam processing on this surface, thereby the oxidized film is partly removed and a substrate blank material is exposed. The watch case 1 is again subjected to the anodizing treatment, by which the fresh secondary anodized layer 5 is formed only in the recessed parts 3 where the substrate is exposed. This anodized layer is dyed to the color different from the color of the primary anodized layer 4. The stages may be reversed and the anodizing treatment may be executed after the recessed parts are first formed by laser beam processing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a watch case, a nameplate, and other decorative parts made of aluminum or an aluminum alloy whose decorative surface is formed in a plurality of colors by alumite treatment, and a method for manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, for example, a watch case made of aluminum for a wristwatch which is a decorative component is subjected to anodizing treatment (alumite treatment) to form a primary corrosion-resistant oxide film having a thickness of about 10 μm on an aluminum cloth, and thereafter. Then, a part of the primary corrosion-resistant oxide film (alumite layer) is removed by polishing, cutting, etc. by machining, and the part is again subjected to secondary anodizing treatment to newly add a thickness of about 30 μm. A method for forming a secondary corrosion resistant oxide film has been proposed (for example, Japanese Patent Laid-Open No. 58-1238).
(See Japanese Patent Publication No. 99).

Further, as a method for making a decorative part made of aluminum or aluminum alloy into a plurality of colors, a method using a photoresist is also performed. This method
A photoresist film made of a photosensitive resin is previously formed on the decorative surface of aluminum (or its alloy may be used) decorative parts, and a transparent film on which the characters and patterns to be formed are drawn is adhered to it. Then, the transparent film is removed after the exposure, and the photoresist film is developed, washed with water, baked, etc. to form a photoresist film corresponding to characters and patterns.

Next, with the photoresist film in close contact (masking) with the decorative surface of the decorative part, it is etched with nitric acid or sodium hydroxide,
Only the portion without the photoresist film is corroded to form a concave portion on the decorative surface. Then, after the concave portion is subjected to the alumite treatment, the photoresist film is peeled off and the alumite treatment is performed again to dye the peeled portion in a different color tone.

[0005]

However, in the case of the former machining method in which a part of the primary corrosion-resistant oxide film is removed by polishing or cutting, the parts to be polished or cut are the watch case. In some cases, the machined portion is often a curved surface, which makes it difficult to perform machining, and it has been difficult to grind or cut it with a uniform thickness.

Further, even when the surface to be machined is a flat surface like a nameplate, when it is desired to give a serial number to each piece, it takes time and effort to machine it. It was tough. Furthermore, in the latter method using a photoresist, a masking process with a photoresist film is required in order to achieve a plurality of desired color tones on the decorative surface of the decorative component, which increases the number of manufacturing processes and increases costs. There was a chance that

The present invention has been made in view of the above problems, and even if the decorative surface of the decorative part to be anodized is a curved surface, high-quality characters, patterns, etc. can be easily inserted therein. The purpose is to be able to. Further, it is also an object to make it possible to easily insert high-quality characters or patterns of two or more colors on the decorative surface.

[0008]

In order to achieve the above object, the present invention provides a decorative component made of a material of aluminum or aluminum alloy, the decorative surface of which has a plurality of colors formed by alumite treatment. A concave portion having characters and patterns formed by processing and a colored layer formed by alumite treatment are formed.

Further, a decorative part is formed by molding a decorative part from a material made of aluminum or an aluminum alloy, anodizing the decorative surface of the decorative part, and then forming recesses such as letters and patterns on the decorative surface by laser processing. A method for manufacturing the same is provided. Further, the present invention also provides a method of manufacturing a decorative part, which comprises forming a decorative part from a material made of aluminum or an aluminum alloy, forming recesses such as letters and patterns on the decorative surface of the decorative part by laser processing, and then performing alumite treatment.

Further, in any one of the above methods for manufacturing a decorative component, the process of forming a recess by alumite process or laser process, or both processes may be performed twice or more.

[0011]

In the decorative component constructed as described above, since the concave portions such as letters and patterns on the decorative surface are formed by laser processing, even if the decorative surface is a curved surface such as a watch case, it can be Can be formed easily and with good finish. Further, since a colored layer formed by alumite treatment is formed on the decorative surface, it is possible to easily insert high-quality characters or patterns of two or more colors.

Furthermore, if a method for manufacturing a decorative component is performed in which a decorative surface is anodized and then recesses such as letters and patterns are formed on the decorative surface by laser processing, a material made of aluminum or aluminum alloy is anodized. To form a corrosion-resistant oxide film (alumite layer) on the decorative surface, and then to form a recess on the decorative surface on which the oxide film is formed by laser processing to partially remove the oxide film and to form a base material. Can be exposed.

Therefore, if the decorative part is alumite-treated again, a new secondary corrosion-resistant oxide film is formed only on the exposed portion of the base material. Therefore, if it is dyed, it becomes a primary corrosion-resistant oxide film. The colors can be different.

Further, if a method for manufacturing a decorative component is performed in which a concave portion such as a character or a pattern is formed on the decorative surface of the decorative component by laser processing, then the decorative surface of the decorative component is subjected to laser processing to generate characters or letters. By forming an alumite treatment after forming a concave portion such as a pattern, it is possible to make the color tone different between the mirror surface portion (decorated surface that was not laser-processed) and the non-glossy surface portion of the same primary corrosion-resistant oxide film. it can.

If the alumite treatment and / or the laser machining for forming the recesses are performed twice or more, different decorative dyeing is performed each time the alumite treatment is performed. The colored layer can be finished.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a partial cross-sectional view showing a cross-section of a watch case of a wristwatch, which is an embodiment of a decorative component according to the present invention, taken vertically at a character portion formed on a decorative surface,
FIG. 2 is a plan view showing the entire watch case. A watch case 1 of a wrist watch, which is this decorative component, is formed of a material of aluminum or aluminum alloy into a shape as shown in FIG. 2, and a decorative surface 2 on the front side thereof is formed in a plurality of color tones by anodizing. .

That is, a plurality of recesses 3 shown in FIG. 1 in which characters (may be marks such as patterns and designs or brand names) are formed on the decorative surface 2 by laser processing, and immediately after electrolysis by alumite treatment. A primary alumite layer 4 which is a colored layer colored with, for example, a gold color by dyeing the film and sealing the film.
Are formed, and the secondary alumite layer 5 is formed on each of the recesses 3 by alumite treatment again, and the color of the secondary alumite layer 5 is changed from the color of the primary alumite layer 4 to, for example, light blue.

In this way, the decorative surface 2 of the watch case 1 is
To form a color, first, the decorative surface 2 of the watch case 1
Alumite treatment (primary) is applied to the whole to form a primary alumite layer 4 by a corrosion resistant oxide film, and after dyeing it in gold color, a laser beam is aimed at a predetermined position on the gold-colored decorative surface 2 by a laser processing machine. The concave portions 3 are respectively formed by irradiating along the shape of the letters, and thereby the oxide film only on the portion irradiated with the laser beam is removed to expose the base material such as aluminum (or aluminum alloy).

Next, the watch case 1 is subjected to a second alumite treatment, but this time, the decorative surface 2 colored in gold.
Since the primary alumite layer 4 has already been formed in the area of, the secondary alumite layer 5 is not formed in the primary alumite layer, and the secondary alumite layer 5 is formed only in the portion of the concave portion 3 where the base material such as aluminum is exposed by the laser processing. It is formed. Therefore, when the secondary alumite layer is dyed light blue and subjected to the sealing treatment, the decorative case 2 becomes the watch case 1 colored in two colors.

In the alumite treatment, the hardness of the alumite layer can be changed by changing the treatment conditions. Therefore, in the case of the watch case 1 of FIG.
It is preferable that the gold portion of the decorative surface 2 is hard alumite treated (hard dame) and the character portion of the recess 3 is alumite treated to have normal hardness.

The difference in the processing conditions between the normal hardness alumite treatment and the hard alumite treatment is, for example, in the former case, the electrolyte composition is 10 to 20 wt% (weight%) of nitric acid (H 2 S).
O4), anodic electrolysis conditions are current density 0.5-2A / dm2 (D
C), voltage 10 to 20 V, electrolyte temperature 15 to 25 ° C.,
When the processing time is 30 to 60 min, a film thickness of about 7 μm can be obtained.

In the case of the latter hard treatment, the composition of the electrolytic solution is 2 to 5 wt% (wt%) of oxalic acid "(COOH)".
2 ”, anode electrolysis conditions are current density 1 to 20 A / dm2 (DC),
When the voltage is 40 to 60 V, the electrolyte temperature is 3 to 5 ° C., and the treatment time is 60 min, a film thickness of about 25 μm can be obtained.

As described above, the decorative surface 2 on which the primary alumite layer is formed is irradiated with a laser beam by the laser beam machine to form the concave portions 3 such as letters and patterns, and the secondary treatment is performed by anodizing the portion again. According to the method of manufacturing a decorative component for forming an alumite layer, even if the decorative member 2 has a curved surface such as the watch case 1 shown in FIG. 1, the concave portion 3 formed on the curved surface has Since it can be easily performed by laser processing, it can be processed more easily than a case where a recess is formed by polishing or cutting using a machine, and further, processing with good finish can be performed.

Further, when the decorative member is a nameplate, it may be desired to give serial numbers thereto. Even in such a case, however, if the concave portions are formed by laser processing, the numbers are sequentially changed. It's easy to do. The characters and marks formed by the laser processing are CAD
If you use (CAD), you can easily create various designs by inserting patterns.

Further, when the decorative part is made to be two-colored with a photoresist, it is necessary to mask the decorative surface of the decorative part with a photoresist film. According to the method for manufacturing a decorative part according to the present invention. However, since it is not necessary to do such a thing, the cost can be reduced by the number of steps.

FIG. 3 is a cross-sectional view showing an embodiment of a nameplate which is a decorative component in which colored layers of three colors are formed on the decorative surface by alumite treatment, and FIG. 4 is a plan view thereof. The nameplate 10, which is this decorative component, is a plate material made of a material of aluminum or an aluminum alloy, and is subjected to secondary laser processing again on a part of the portion subjected to the primary alumite treatment → primary laser processing → secondary alumite treatment → secondary alumite treatment → A colored layer of three colors is formed on the decorative surface (upper surface in FIG. 3) through each step of the tertiary alumite treatment.

That is, the steps will be described step by step. First, the entire nameplate 10 is subjected to a primary alumite treatment to form a primary oxide film on the entire surface, and the entire surface is dyed, for example, in silver white. The sealing treatment is performed to form the primary alumite layer 11.

Next, a part of the primary alumite layer 11 is processed by primary laser processing to expose the base material of aluminum (or its alloy) to form a recess 31, and then a secondary alumite treatment is performed. A secondary oxide film is formed only on the portion of the recess 31 where the base is exposed, and that portion is dyed, for example, in gold color and subjected to a sealing treatment to form the secondary alumite layer 12.

Further, the central portion of the secondary alumite layer 12 is processed again by the secondary laser processing to form the concave portion 32 for exposing the base material of the material, and then the tertiary alumite treatment is performed to expose the base material. A tertiary oxide film is formed only on the concave portion 32, and that portion is dyed red, for example, and a sealing treatment is performed to form the tertiary alumite layer 13.

By sequentially carrying out such steps,
A silver-white primary alumite layer 11, a golden secondary alumite layer 12, and a red tertiary alumite layer 13 as shown in FIG.
The nameplate 10 having three colors can be made.

FIG. 5 is a sectional view showing a watch case used for explaining a method of performing alumite treatment after forming a recess by laser processing. The watch case 40, which is this decorative component, is formed of a material of aluminum or aluminum alloy. After forming a concave portion 43 such as letters and patterns by laser processing on the upper decorative surface in the figure, the whole is anodized. There is.

In this way, the watch case 40 is covered with the alumite layer 41 whose surface is anodized and dyed in the same color as a whole, and the alumite layer formed in the recess 43 of the laser processing. 41 ′ has a dull color tone because the surface is formed in a portion roughened by laser processing, and the decorative surface 42 excluding the concave portion 43 is formed.
Since the portion (which has been polished to a mirror surface state in advance) has a mirror surface state, it is possible to make the color tone different while having the same color.

FIG. 6 is a sectional view showing an embodiment of a name plate which is a decorative component in which a resin is embedded in a laser-machined recess. The nameplate 50, which is a decorative component, is made of a plate material made of aluminum or an aluminum alloy, and a concave portion 53 such as letters and patterns is formed on the decorative surface 52 by laser processing.
1 is formed on the alumite layer 51 formed in the concave portion 53, and then the plastic cloisonne (resin) colored with the color used is poured and solidified to form the colored portion 54. The colored portion 54 and the alumite layer 51 are two-colored. In this way, besides dyeing the alumite layer,
It is also possible to use other members such as resin to make the decorative surface multi-colored.

FIG. 7 is a sectional view showing an embodiment of a timepiece case in which the laser processing and the alumite treatment are repeated twice or more to make the decorative surface a plurality of colors. The watch case 60, which is this decorative component, is subjected to the primary laser processing (forming the concave portion 65), the primary alumite treatment, and the secondary laser processing (forming the concave portion 66) again on a part of the decorative surface which has not been subjected to the primary laser processing. The decorative surface (upper side in the figure) has three colors through the following alumite treatment steps.

When these steps are sequentially performed, the primary alumite layer 61 in a mirror-like state, the primary alumite layer 61 'having the same color as that of a non-glossy tone, and the secondary alumite layer 62 dyed in a different color from them. And can be formed,
Further, if the laser processing and the alumite processing are repeated, it is possible to form colored layers of four or more colors on the decorative surface.

[0036]

As described above, in the decorative part according to the present invention, since the concave portions which become characters and patterns on the decorative surface are formed by laser processing, the decorative surface having a curved surface such as a watch case is used. However, since the recess is formed easily and with a good finish, it is possible to achieve high-quality coloring of two or more colors in the recess and the decorative surface other than the recess.

Further, the characters and patterns can be easily formed even by a complicated design by inputting a pattern using CAD. Further, even when it is desired to give a serial number to each nameplate as in the case where the decorative component is a nameplate, this can be easily performed.

Further, if the decorative surface is anodized and then the decorative surface is subjected to laser processing to form recesses such as letters and patterns, a method for manufacturing a decorative component is used. Since it is not necessary to perform the troublesome work of masking the decorative surface with a photoresist film as in the case, the cost can be reduced accordingly.

Further, if a method for manufacturing a decorative part is performed in which a decorative part such as characters and patterns is formed on the decorative surface of the decorative part by laser processing, then the characters and patterns are partially laser-processed. Since the decorative surface is anodized in the state where the recesses are formed, the processed surface is a mirror surface of the decorative surface that has not been laser-processed, even though the processed layer is the same corrosion-resistant oxide film as the anodized layer. The matte surface can be used to create different tones.

If the alumite treatment, the laser treatment, or both treatments are performed twice or more, different coloring is performed each time the alumite treatment is performed, so that the decorative layer has a multicolored coloring layer. Can be finished.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view of a character case portion formed on a decorative surface of a watch case of a wristwatch, which is an embodiment of a decorative component according to the present invention, taken along line EE in FIG.

FIG. 2 is likewise a plan view showing the entire watch case.

FIG. 3 is a cross-sectional view showing an example of a nameplate which is a decorative component in which three colored layers are formed on the decorative surface by anodizing.

FIG. 4 is a plan view of the same.

FIG. 5 is a cross-sectional view showing a watch case used for explaining a method of performing alumite treatment after forming a recess by laser processing.

FIG. 6 is a cross-sectional view showing an example of a nameplate which is a decorative component in which a resin is embedded in a recess processed by laser.

FIG. 7 is a cross-sectional view showing an embodiment of a watch case in which the laser processing and the alumite treatment are repeated twice or more to make the decorative surface a plurality of colors.

[Explanation of symbols]

 1,40,60 Watch case (decorative part) 2,42,52 Decorative surface 10,50 Name plate (decorative part) 3,31,32,43,53,65,66 Recessed part 4,11,61 Primary alumite layer 5, 12,62 Secondary alumite layer 41,41 ', 51 Alumite layer

Claims (4)

[Claims] 1. A decorative component made of an aluminum or aluminum alloy material having a decorative surface formed in a plurality of tones by anodizing, and a concave portion having characters and patterns formed by laser processing on the decorative surface and anodizing. A decorative part having a colored layer formed thereon. 2. Forming a decorative part from a material made of aluminum or an aluminum alloy, subjecting the decorative surface of the decorative part to anodizing, and then forming recesses such as letters and patterns by laser processing on the decorative surface. A method for manufacturing a featured decorative component. 3. A decorative part is formed from a material made of aluminum or an aluminum alloy, and recesses such as letters and patterns are formed on the decorative surface of the decorative part by laser processing.
A method for manufacturing a decorative part, characterized by performing anodizing. 4. The method of manufacturing a decorative part according to claim 2, wherein the process of forming a recess by the alumite process or the laser process or both processes is performed twice or more. Production method.