JPS625305B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a timepiece dial. In particular, it relates to expressions such as hour and minute scales and brand names.

Conventionally, the hour and minute scales were expressed by printing the brand name or by placing a diamond-cut member on the dial after press molding. However, they each have their drawbacks. In other words, in the case of the former, since it is a printing method, the surface does not have metallic luster, and even if metallic ink is used, it cannot be made into a mirror-like flat surface, so there is no sharpness. In the latter case, a separate component is implanted, so the hands cannot pass through at least 0.2mm of the top of the dial, making the entire watch thicker. Furthermore, the number of parts is large and the number of processing steps is also required, resulting in high costs.

The present invention solves these drawbacks of conventional dial plates, and provides a dial plate that does not have hour/minute scales, brand names, etc. protruding from the top surface of the dial, and has a flat, sharp metallic luster surface. It's something you get.

The gist of the invention is as described in the claims.

Next, the present invention will be explained in detail with reference to Examples. First, the process of pressing out the material and welding the legs are the same as for conventional dials. The next polishing step may be a conventional buffing process, but the buffing pattern must be fine and close to a mirror surface.
In the plating step that follows, if necessary, after base plating with nickel or the like, desired finish plating with gold, silver, etc. is applied. Next, a resist film is formed by printing, photoresist method, etc. on the portion where the mirror-like plating is desired to be left. Then, using a metal brush or the like, a radial pattern called Asahiko, or parallel patterns in the vertical and horizontal directions are added and then plating is applied. In this case, it is generally preferable that the plating has a different color tone from the above-mentioned finishing plating. Then, the resist film is peeled off. Furthermore, a transparent protective coating may be applied if necessary.

When applying a thick layer of glossy nickel plating to the base plating described above, the leveling effect is strong and the surface becomes smooth, resulting in a higher quality.If you do not want such high quality, you can use the previous polishing process. It doesn't matter if the quality is poor, improving workability and yield.

Note that the method of the present invention may be applied only to the center part of the dial, such as the brand name. In other words, there is a case where there is no space between the dial and the hour hand to insert the brand name of a separate member, but a built-in hour and minute scale is provided. In this case, it goes without saying that the hour and minute scale must be placed outside the trajectory of the tip of the long hand, or it must be installed lower than the long hand.

As described above, according to the present invention, it is possible to obtain a dial plate for a timepiece that has a high-class feel and has a flat, sharp metallic luster surface without the brand name or hour/minute scale being prominent.

Claims (1)

[Claims] 1. In a method for manufacturing a watch dial, which includes a step of pressing the material, a step of welding the feet, a polishing step, a plating step (), a resist film forming step, a patterning step, a plating step (), and a resist film peeling step. , the plating step () is performed to increase the thickness in order to smooth out irregularities such as scratches on the dial surface.
A method for manufacturing a watch dial, comprising the steps of applying a glossy nickel plating of 0.005 mm to 0.03 mm, and applying a desired finish plating of gold, silver, etc. on the glossy nickel plating.