JPS58205883A - Dial for watch - Google Patents

Abstract

PURPOSE:To obtain a dial comprising a noble stone high in value added, by a method wherein a three-dimensional pattern is molded on the surface of a face comprising a fragile material such as the noble stone or ceramics by ultrasonic processing and a metal vapor deposition coating is formed to the pattern part. CONSTITUTION:A horn vibrated at 15-30kHz is contacted with the surface of a noble stone base plate 2 under definite static pressure in the presence of a mixture of a grinding particle and water and the leading end thereof is impacted with the noble stone surface through the grinding particle to finely crush the same to process a three-dimentional pattern 2a. In the next step, a metal coating 4 is formed to the surface of the noble stone base plate and the three-dimensional engraved pattern part by vacuum vapor deposition. In addition, after the surface of the noble stone base plate is shaved and polished, said plate is fixedly secured to a metal base 1 provided with a protrusion for fixing a face to movement.

Description

[Detailed Description of the Invention] The present invention forms a metal vapor deposition film on the surface of a dial made of brittle materials such as precious stones, ceramics, and superhard materials, where a pattern with a three-dimensional effect is engraved by ultrasonic processing. This paper relates to a mobile watch face plate and its town construction method.

The importance of the exterior of mobile watches has been reconsidered from prioritizing functionality, and the demand for products with high decorative effects has increased.The surface of precious stones such as black onyx, lapis lazuli, and trametite is polished flat with precision to bring out the beauty of precious stones. The dial expressing this expression has been commercialized, but the product is simply the surface of a precious stone polished flat.

For the purpose of adding patterns to the surface of precious stones, we have considered etching methods and methods using laser beams, but in both cases, the ingredients that make up precious stones contain partially different properties, so the etching method was not recommended. With the laser method, there are parts that are not etched, and with the laser method, the light transmittance varies depending on the constituent components, so there are parts that cannot be melted, so the present invention could not be commercialized. By forming a three-dimensional pattern by ultrasonic processing and forming a metal vapor deposition film on the pattern, the present invention aims to provide a precious stone dial with even higher added value and a method for manufacturing the same.

On the surface of a roughly polished precious stone substrate approximately 0.05 + m thicker than the finished dimension, both amplitudes 10 to 150 μtn1 frequency 15
A horn that vibrates at ~50 KH2 comes into contact with the precious stone substrate under a constant static pressure in the presence of a mixture of abrasive grains and water, and the tip of the horn impacts the precious stone surface through the abrasive grains, causing It is crushed finely and processed into three-dimensional patterns. Next, gold,
A metal film of silver, aluminum, nickel, chromium or the like is formed on the surface of the precious stone substrate and the three-dimensional carved pattern to a thickness of about 500 to 5000 angstroms at a vacuum degree of 10-' TOrr. Furthermore, after grinding and polishing the surface of the precious stone substrate, it is attached to a metal base with protrusions for fixing the dial to the movement, and then letters and marks are printed on the surface of the precious stone substrate.

A pattern is formed on the tip of the horn by joining together pieces obtained by cutting, electrical discharge machining, or electroforming.
It is better to make one side about 0.05 screen smaller than the finished processing dimensions. As the abrasive grains, silicon carbide, aluminum oxide, boron carbide, etc. are used. For surface polishing of precious stone substrates, cerium oxide, chromium oxide,
Aluminum oxide. such as diamond paste.

Polisher materials include polyurethane, felt, and cast iron.

Next, the present invention will be explained in detail.

In order to obtain a lattice pattern with a concave groove with a width of α2fl, the thickness is 0.
．． 7 mm sOuter diameter φ2.8518 *Center hole φ1.6
When black onyx rough-finished to 5m+n was processed with an ultrasonic processing machine for 30 seconds using a horn with a lattice-like pattern, a pattern with a depth of 0.1WIn could be processed. The processing conditions are as follows.

Vibrator input 400W Working voltage 2KV Frequency 18KHz Abrasive grain Boron carbide #220 Processing pressure 1.5 plum Horn material 545C! Next, chromium was blown onto the black onyx surface under a vacuum degree of 10'''' torr to form a chromium film on the black onyx surface. Next, there was some sag on the black onyx surface and the pattern area, and in order to finish polish the surface, I finished polishing it with polyurethane and cerium oxide, and glued neoprene rubber to the metal base where the dial feet are provided. After bonding with adhesive and drying for 30 minutes at 80°C, abbreviations are printed on the black onyx surface.
As a result of printing marks etc. and drying at 80℃ for 30 minutes,
The result was a precious stone dial made of black onyx with a three-dimensional lattice groove pattern with metallic luster.

As described above, the face plate for a mobile watch according to the present invention is capable of processing a three-dimensional pattern with metallic luster on a face plate made of brittle materials such as precious stones and ceramics, thereby providing a high value-added product to the market. The effect is great because it can be done.

[Brief explanation of drawings]

The drawing is a sectional view of the dial of the present invention. 1...Dial base 2...Precious stone substrate 2α...Pattern grooves processed into precious stone substrate 3...adhesive layer 4...Metal deposition film layer

Claims (1)

[Claims] The face of a mobile watch is made of brittle materials such as precious stones and ceramics. After the surface is engraved with a three-dimensional pattern using ultrasonic processing and a metal vapor deposition film is formed, the face of the face is lap-polished. A precious stone dial with a three-dimensional pattern made flat by polishing.