JPS6123273B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention applies hard materials such as ceramics, carbide, and precious stones, or soft materials such as brass, nickel silver, aluminum, and titanium, to surface hardening treatments such as hard plating, hard alumite, and boron nitride treatments. case, band, dial, parting board,
This invention relates to a hard exterior part for a watch, which is characterized by forming photographs, designs, drawings, letters, numbers, or combinations of linear curves on the surface of exterior parts such as reuses and hands, using a laser beam, and a method for manufacturing the same. be. Conventionally, there are engraving, engraving, machining, ultrasonic processing, etching, etc. as methods for patterning hard exterior parts for watches, but the above processing methods have the drawbacks of poor pattern reproducibility and poor mass production. It was hot. Moreover, with the conventional method, it is not only impossible to develop delicate patterns, photographs, etc., but also it is difficult to process linear patterns on mirror-polished flat surfaces, uneven surfaces, and curved surfaces. Abrasive grains, chips,
Also, due to the scattering and intrusion of corrosive liquid, etc., appearance defects such as scratches and clouding occurred frequently, making mass production difficult. In particular, it has been impossible to process uneven surfaces of exterior parts with uniform depth and line thickness. Recently, ultra-hard (HV-2000 or higher) watch exterior parts have been developed using composite materials made by mixing carbides, nitrides, borides, etc. with binders and oxides in appropriate proportions and sintering them. When the hardness increases, pattern processing using conventional methods is impossible. In recent years, fashionability has become important in watches as well, and highly decorative items have been required. However, conventional hard exterior parts for watches manufactured using hard materials have mainly been mirror-polished. In addition, since it takes time to work on items with rough machine patterns,
It was only available for high-priced products. Conventional processing methods have the drawback of not being able to fully meet the above requirements. It is an object of the present invention to solve the above-mentioned drawbacks and to provide a highly decorative hard exterior part for a watch and a method for manufacturing the same. The present invention relates to a method of modulating and scanning a laser beam using an electric signal (Japanese Patent Application No. 1983-064063) and a method of using a mesh pattern photograph as an original image (Japanese Patent Application No. 1983-064063).
-159498) and a method of numerically controlling and driving the angles of the X, Y, Z axes and XY axes of the processing base of the exterior part to be processed, etc., according to the present invention, to focus the laser beam. A hard exterior part for a watch is characterized in that a part of the surface of the hard exterior part is melted and altered to form a pattern of photographs, designs, letters, numbers, and combinations of straight lines. This method of manufacturing a hard exterior part for a watch is characterized in that a transparent resin film made of an organic material is formed on the surface of the exterior part, and then laser processing is performed to form a delicate pattern on the surface. Embodiments of the present invention will be described below based on the drawings and tables. The drawings and tables illustrate embodiments of the invention. FIG. 1 is a schematic diagram of a laser apparatus for writing a combination of linear and curved patterns in accordance with the present invention. Note that the laser equipment that uses original images such as photographs and drawings is the same as that described in the patent application 15498-1982, and will therefore be omitted. Figure 2 shows a hard watch made of hard materials such as ceramics, carbide, and precious stones, or hardened materials such as brass, aluminum, and titanium, on which patterns have been formed according to the present invention. This is a complete diagram of the exterior parts. Example 1 First, the laser device shown in FIG. 1 will be explained. Attach the case 1 to the processing pedestal 2, adjust the processing pedestal 2 while observing with the alignment optical system 6, align the optical axis of the reference laser beam on the case 1 as the center, and use X, Y to draw the expected pattern. , set the machining feed amount of the Z-axis XY angle to the numerical value in the drive device 4. When the start button of the drive control device 4 is input, the Q switch of the interlocked laser device 5 is turned on, the laser beam 7 is oscillated, and the drive is started according to the set values of the X, Y, Z axes, and XY axis angles of the drive control device 4. The device 3 is driven, and a pattern of combinations of straight lines and curves is formed on the upper surface of the case 1 by laser beams.
FIG. 2 is a completed plan view of a hard exterior part for a watch manufactured according to the present invention, showing a case 10 and a dial plate 1.
1 and band 12 are shown, respectively. FIG. 3 is an enlarged plan view of the dial 11. 11a is a mirror polished surface;
Reference numeral 11b indicates a mirror-polished surface, and reference numeral 11b indicates a laser-processed portion. In addition, the case 10, the dial 1
1. A transparent resin film made of an organic material is previously formed on the surface of the band 12 where the uneven pattern will be formed by laser processing. Example 2 This is an example of pattern processing on the surface of an uneven or curved portion mechanically formed by the apparatus and operating method of Example 1. FIG. 4 is a partial sectional view of the case. FIG. 5 is a partial perspective view of the case. 10a indicates a curved uneven portion. 10a, the feed value of the drive control device 4 in the Z-axis direction and X,
By combining the Y-axis feed values, it is possible to draw a pattern with the same line width and depth as the surface of the flat surface. In addition, the combination of the mechanically curved concavo-convex pattern and the laser-processed pattern causes a light interference and scattering phenomenon, resulting in beautiful shine and excellent design expression. Although not shown in the drawings as in Example 1, a transparent resin film made of an organic material is previously formed on the portion where the uneven pattern is to be formed by laser processing. Example 3 This is an example of pattern processing on the dial surface using the apparatus and operating method of Examples 1 and 2. FIG. 6 is an enlarged sectional view of the processed state of the dial 11 on which a transparent resin film made of an organic material is formed.
3 shows the molten material scattered during processing by the laser beam. 14 indicates a transparent resin coating layer. The molten substance 13 scattered during laser processing adheres to the transparent resin film and is very easily removed together with the transparent resin during organic solvent cleaning in the plating step after laser processing. In addition, since the transparent resin coating does not undergo any change during laser processing as it passes through the light beam, the hard plating surface of the completed dial plate, on which the transparent resin coating made of organic material for hard plating treatment and finishing, is formed will have an uneven pattern. It is also possible to form The effects of the transparent resin coating 14 of this embodiment are to prevent melted substances scattered during laser processing from adhering to unprocessed parts, to prevent oxidative discoloration by blocking the processed parts from oxygen atmosphere, and to prevent thermal discoloration of processed materials due to the cooling effect. prevention of physical property deterioration, etc. Table 1, Table 2, and Table 3
The table shows the environmental resistance test results of the carbide case processed according to the present invention. This environmental resistance test did not show any problematic results. As explained above, the present invention is made of hard materials such as ceramics, carbide, precious stones, etc.
Hard plating, hard alumite, etc. are made of soft materials such as brass, nickel silver, aluminum, and titanium.
Cases with surface hardening treatment such as nitride boron treatment,
A transparent resin film made of an organic material is formed on the surface of a band, dial, parting plate, reuse, hands, etc., and a photograph, design, drawing, letter, number, or straight curve combination pattern is applied to the surface using a laser beam. To provide a hard exterior part for a watch that has an extremely decorative appearance with delicate patterns on the surface, which is unprecedented because it is formed by molding, and does not cause material deterioration of processed materials. can do. In addition, patterns with the same quality of line width and depth as the flat surface can be drawn not only on the flat surface of a mirror-polished hard exterior part for a watch, but also on the curved uneven surface. Furthermore, since the present invention forms a transparent resin coating layer on the surface of the exterior component before laser processing, it is effective in processing molten substances, and is also effective in terms of mass production, pattern reproducibility, and cost reduction. It is also a huge manufacturing method.

[Table] Sample 1 Titanium nitride (carbide case)
Quantity 10 pieces 2 Tartan carbide ( )
10 3 Tungsten carbide ( )
10 CASS composition conditions Sodium chloride 50g / Acetic acid 3c.c. / Cupric chloride 0.2g / Temperature 35℃ Spraying pressure 1Kg/cm ²

【table】 Sample Same type and amount as Table 1 Artificial sweat composition conditions Butyric acid 5c.c. urea 1g Sodium chloride 7g Methanol 500c.c. Water 500c.c. temperature room temperature immersion

【table】 Sample Same type and number as Table 1 Conditions Sunlight 40,000 lux Temperature 70℃

[Brief explanation of the drawing]

Figure 1 is a schematic diagram of the device used in the present invention, Figure 2 is a schematic diagram of the device used in the present invention;
The figure is a completed plan view of a hard exterior part for a watch, Figure 3 is an enlarged plan view of the dial, Figure 4 is a partial sectional view of the case, Figure 5 is a partial perspective view of the case, and Figure 6 is the dial. Each shows an enlarged cross-sectional view of the processed state. 1...Case, 2...Processing pedestal, 3...X, Y, Z
axis, and X, Y axis angle drive device, 4...X, Y, Z
axis, and X, Y axis angle control device, 5... laser device, 6... positioning optical system, 7... laser beam, 8
...Reflector, 9...Condensing lens, 10...Case, 10
a... Curved uneven portion, 11... Dial plate, 11a... Mirror polished surface, 11b... Processed part, 12... Band, 13...
molten substance.

Claims (1)

[Claims] 1. A transparent resin coating made of an organic material is formed on the surface of a watch exterior component having a hard surface, and then laser processing is performed on the face through the transparent resin coating to improve the lower surface of the transparent resin coating. A method of manufacturing an exterior part for a watch, characterized in that a concavo-convex pattern is formed on the surface of the watch.