JPS5947372A - Multicolored dial for timepiece and its manufacture - Google Patents

Abstract

PURPOSE:To stabilize the quality and to improve the productivity, by cladding the surface of stainless steel with a colored metal such as gold and by working the resulting composite material into the desired shapes. CONSTITUTION:Stainless steel A and gold foil B or the like are cold bonded together by means of rolls 3 and subjected to diffusion heat treatment in a furnace 4 to manufacture a composite material C. By pressing the material C, the surface of the steel A is partially clad with >=1 kind of colored metal such as gold in a continuous or discontinuous state. The resulting composite material is worked into the desired shapes of parts to obtain a multicolored dial for a timepiece having a multicolored pattern.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dial of an exterior part for a timepiece, and has the following features as a dial for poetic language: 1. Unsurpassed high corrosion resistance,
While greatly improving the quality of color fastness and hardness,
Is the 7111 cutting edge suitable for precision machining an alternative to the plating process? i! The present invention relates to a new multicolored dial for a timepiece that has successfully achieved a low price, and a method for manufacturing the same.

Conventionally, the dial plate for poetic language was mainly made of 1', I...1 alloy. After processing into the desired part shape, nickel (μ-
↑1i], P (hereinafter referred to as A, 9) gold (hereinafter referred to as A
[U]] Plating was applied to the middle layer or multiple layers L2 to achieve ease of eating and high quality.

However, the plating process requires a complicated process and expensive equipment, and at the same time has the drawbacks of being prone to corrosion and rust, and since it uses A7t#Agk, the raw material cost is also very high. However, if the plating is carried out only in extremely limited areas without reducing raw material costs, the process, equipment, or existing Q) technology will be more complicated and expensive, and the disadvantages of I have it.

However, in Ag plating, kJ, surface monochromaticity is inferior, so plating process 3'!l'! Clear lacquer'
(11) It has the disadvantage of being uneconomical as it requires coating.

As mentioned above, the present invention has been made in order to eliminate the σ defects in the past, and to provide a multicolor dial plate for occasional use that reduces the number of processes and has uniform quality, and its manufacturing capacity 7f. This is the purpose.

In other words, the inventor of the present invention has conducted various studies in order to add novelty to the design by adding multiple colors, to ensure higher quality than before, and to reduce the manufacturing cost. After coating the desired dissimilar metals, the adhesion can be improved by diffusing the dissimilar metals through heat treatment, cold crimping of colored metals and 8US material is possible, and the width and thickness of the coated colored metals are high. The present invention was completed by discovering that accuracy can be controlled.

The present invention will be explained below based on examples.

Embodiment FIG. 1 is an example of the process of coating the workpiece material (base material) and different metals used in the present invention.

AC1') After cleaning in a SUS 304'il cleaning tank, 2
After removing the oxide film, attach the narrow A of 5US304 to the desired position on the 5US3040 surface.
W foil was supplied, cold N was performed with the roll of 3, diffusion heating was performed with the furnace body of 4, and a portion of the surface of 5US3Q4 was continuously coated with Agi to produce a composite material of C.

Next, the second
Two samples were produced by pressing according to the layout shown in the figure. FIG. 3 is a cross-sectional view of the sample.

Next, a diffusion treatment (diffusion heating) was performed on the following Φ items to complete the sample.

Processing conditions Temperature: 200° C. to 300° C. Holding time: 30 minutes to 1 hour Atmosphere: 5XIO-' to 2

When produced by the method of the present invention, the multicolored dial plate for N1 has different color tones in the base material and the coating, and has a good design because it is decorative and has the role of typesetting.

Table 1 shows the results of corrosion resistance tests of samples of the present invention and conventional watch dials. Note that 114 samples for comparison with the products of the present invention were prepared by a conventional method.

Furthermore, the results of the corrosion resistance test were determined comprehensively by conducting a moisture resistance test, a sulfur resistance test, and a light resistance test, which are required for watch dials.

Table - Table ◎%n-. ○Good. ×Inferior.

The product of the present invention gave better results than the conventional product.

By the way, are the above embodiments part of the present invention? : Exists, type of base material SUS and colored metal, ]-q method of coupling, l],
By combining various types of gallo, thickness, etc., the
It is possible to provide a highly novel multicolored character temporary silk text that allows for a wide variety of designs.

As detailed above, the present invention includes 111. Instead of plating, which is expensive and has unstable quality, it coats only the desired surface area with the desired colored metal and improves adhesion through diffusion treatment, resulting in stable quality and excellent IJ productivity. A multicolor dial plate for N1 and a method for manufacturing the same can be provided at an economically low cost.

[Brief explanation of drawings]

Figure 1: A in the Qj knee application process. . mother): j, B
. . Coated metal, C0° composite material, ■. . Wash, 2°. Oxidation degree) removed to 1, 3°. Contact rolling, 4°. 4. +7,
Heat-forming treatment FIG. 2 shows one example (B1).・Skani I Nilayaud map 5
゜0 hour clock 1 part, Figure 3 is Figure 2. NJF side view of watch parts Figure 4 is -7mm multicolor dial (a,). . A calendar window is provided in the covering part, (b). . jJli 79
The part is 41 (J-shaped, (C),. Cover (7)
Even if the p sword is completely diagonal, it is ). A, A', A'
ee base material, B, Bl, 13", coated metal, D, 6 calendar window, 3°6.9.+2., indicates time. Applicant Daini Seikosha Co., Ltd. Agent Patent Attorney Mogami duties

Claims (1)

[Claims] Colored gold such as gold E4 is applied to a part of the stainless steel surface.
A multicolored dial for a watch, characterized by having a multicolored pattern, by processing a composite material coated continuously or discontinuously with two or more types into a desired part shape, and its manufacture. Method.