JPH03255978A - Production of dial for timepiece - Google Patents

Abstract

PURPOSE:To represent characters, etc., which provide metallic luster and are embossed from a paint surface by coating the decorative part of a timepiece dial metallic base with etching resist and peeling the etching resist after etching, coating the entire surface of the dial with paint and polishing the dial surface, and plating the decorative part. CONSTITUTION:The etching resist 2 where Roman characters are patterned is formed on the timepiece dial metallic base 1 of, for example, brass by a photoresist method and after the base 1 is etched with bright dip liquid until an etching step reaches about 20mum, the resist 2 is peeled with a solvent to obtain a dial base. Then a film 3 is formed on the entire surface of the dial by applying white paint to about 10mum film thickness and transparent clear to about 20mum film thickness and the surface is smoothed and polished by about 10mum until Roman character parts are exposed. Then the preprocessing for the plating is carried out and then plating 4 using gold alloy of about 22 carats is carried out to obtain the dial for the timepiece.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method for manufacturing a timepiece dial.

[Summary of the invention]

In a method for manufacturing a watch dial, the present invention applies an etching resist to a decorative part of a metal base of a watch dial, etches the parts other than the decorative part, and then removes the etching resist and etches the entire surface of the dial. By applying paint and smoothing the surface of the dial to expose the metal surface of the decorative part, the decorative part is plated to give it a metallic luster and stand out from the painted surface. To simply and inexpensively provide a watch face plate expressing delicate characters, scales, names, marks, patterns, etc. on the outside.

[Conventional technology]

Conventionally, the method of expressing delicate characters, scales, names, marks, patterns, etc. that have a metallic luster and stand out from the painted surface is to pattern UV resist and apply thick patterns to create characters, scales, names, marks, etc.・Resist peeling after creating patterns, etc.

A thick plating method that involves painting, smoothing, and plating processes,
There was an electroforming method in which the dial base, letters, scales, names, marks, patterns, etc. were created using TVF technology such as aluminum, nickel, and copper, and then went through the steps of painting, smoothing, and plating.

[Problem to be solved by the invention]

The thickening method and electroforming method described above involve many manufacturing steps and take a very long time to manufacture.
This has resulted in a drawback of increased manufacturing costs.

[! Means for Solving I8] In order to solve the above problems, in the present invention, in a method for manufacturing a watch dial, an etching resist is applied to the decorative portion of the watch dial metal base, and the etching resist is applied to the decorative portion of the watch dial metal base. After etching the part, the etching resist is peeled off, paint is applied to the entire surface of the dial, and the dial surface is smoothed and polished to expose the metal surface of the decorative part, and then the decorative part is plated. By applying this, it has a metallic luster and the appearance of delicate letters, scales, names, etc. that stand out from the painted surface.
An attempt was made to provide a watch face plate expressing marks, patterns, etc. simply and inexpensively.

[Effect]

In the present invention, the etching solution for etching the metal base of the dial plate may be selected from the one most suitable for the metal or alloy used, and there is no problem as long as the etching depth is approximately 20 μm.0 Apply after etching the base of the dial plate. Paint not only achieves the color tone and gloss required by the designer, but also has a smooth finish. ! It also functions as a plating resist during subsequent plating.

In the final step of plating, since the decorative portion of the present invention is the dial metal base itself, metals or alloys can be deposited by not only electroplating but also electroless plating and vapor phase plating.

〔Example〕

(Example 1) An etching resist 2 with a Roman numeral pattern patterned on a brass watch dial metal base 1 was prepared as shown in No. 211A by the photoresist method, and the dial metal base 1 was etched with Kirins liquid. After etching as shown in B until the surface of the dial becomes 20 μm, the etching resist 2 is peeled off with a solvent to obtain a dial base as shown in C. Next, a white paint with a thickness of 10 μm is applied to the entire surface of the dial. Paint film 3 is coated with transparent clear film with a thickness of 20 μm in this order, and the thickness is approximately 10 μm until the Roman numeral part is exposed.
m smooth polishing was performed. Thereafter, a pretreatment for plating was carried out according to a conventional method, and then a 22 currant gold alloy plating 4 was applied to obtain a watch dial as shown in FIG.

(Example 2) An etching resist 2 with Arabic numerals patterned on a watch dial metal base 1 made of nickel silver was prepared as shown in FIG. After etching was performed as in B until the etching step became 15 μm, the etching resist 2 was peeled off with a solvent to obtain a dial base as in C.

Next, Coating M3 was applied on the entire surface of the dial by applying black paint with a thickness of 10 μm and transparent clear with a thickness of 10 μm in this order, and the dial was polished to a smoothness of approximately 5 μm until the Arabic numerals were exposed. Thereafter, a pretreatment for plating was performed according to a conventional method, and then pure gold plating 4 was applied to obtain a watch dial as shown in FIG.

(Example 3) An etching resist 2 with an arabesque pattern patterned on a brass watch dial metal base 1 was prepared by a photoresist method as shown in FIG. Etching step with aqueous solution is 15μm
After etching as shown in B until Coating film 3, which was coated with a 10 μm transparent clear film in this order, was shaped and polished to a thickness of about 5 μm until the Arabic numerals were exposed.

Thereafter, a pretreatment for plating was performed according to a conventional method, and then rhodium plating 4 was applied to obtain a watch dial as shown in FIG.

Effects of the Invention] In the method for manufacturing a watch dial, the present invention applies an etching resist to the decorative portion of the metal base of the watch dial, etches the portions other than the decorative portion, and then applies the etching resist to ##. JI! L, apply paint to the entire dial,
By polishing the dial surface smooth and exposing the metal surface of the decorative part, plating is applied to the decorative part to create delicate letters and letters that have a metallic luster and stand out from the painted surface. It has become possible to easily and inexpensively provide clock dials expressing scales, names, marks, patterns, etc.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a timepiece dial according to the present invention, and FIG. 2 is a sectional view of the timepiece dial at various manufacturing steps of the present invention. 1...Dial metal base 2...Etching resist 3...Coating film 4...Plated metal Above Ganto Kamiyama Seiko Electronics Industries, Ltd.

Claims (1)

[Claims] Parts of the metal base of watch dials that require letters, scales, names, marks, and patterns (hereinafter abbreviated as decorative parts)
After applying etching resist to the surface and etching the parts other than the decorative parts, peel off the etching resist, then apply paint to the entire dial surface, and polish the dial surface to smooth the decorative parts. A method for manufacturing a watch dial, characterized in that after exposing the metal surface, plating is applied to the decorative portion.