JPS606269A - Production of external parts for timepiece - Google Patents

Abstract

PURPOSE:To permit sure and easy ornamentation of titled parts by setting a member consisting of ceramics or heat resistant metal in the worked grooves of a stainless steel part, filling the clearances with a gold or silver brazing material and grinding the top surface thereof thereby obtaining the appearance having three tones. CONSTITUTION:Grooves 1 having about 0.5mm. depth are worked in a base metal 4 of a band for a timepiece consisting of a stainless steel material. Members 2 of ceramics sized smaller by about >=0.2mm. than the shape of such grooves are set in the grooves 1. An 18K brazing material 3 is filled in the clearances between the metal 4 and the members 2 and the clearances are thoroughly brazed in a high frequency or vacuum furnace. The top surface is thereafter ground and polished to expose the base metal 4, the member 2 and the material 3 on the surface position, thereby obtaining the appearance having three tones. A material having high heat resistance such as a sintered hard alloy or the like in addition to said material are used for the members 2. The ornamentation of the external parts for the timepiece is thus made sure and easy and the durability of the ornamental parts is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for decorating the body and metal band of a portable wristwatch.

[Prior art]

Conventionally, as a method for decorating the body or metal band of a portable wristwatch with ceramic or superhard alloy, a thin plate of ceramic or superhard alloy was adhered or adhered to the body surface or metal band surface using an adhesive or adhesive. It was something. However, with this conventional method, the ceramic or super hard alloy thin plate may peel off due to aging of the adhesive or adhesive, or there may be gaps between the ceramic or super hard alloy thin plate and the fabric of the body of the portable watch or the metal band. A gap was created, and the gap became a gathering place for garbage, which did not look good.

[Purpose of the invention]

The present invention aims to compensate for the drawbacks of the above-mentioned prior art and to provide a new method for decorating highly heat-resistant materials such as ceramics or ultra-hard materials.

[Structure of the invention]

Embodiments of the present invention will be described based on the drawings.

First, a groove 1 with a depth of about 0.5 m is machined on the flat or sloped part of the body or band of a portable wristwatch made of stainless steel, as shown in Figure 1. Insert the ceramic member 2 as shown in FIG. , fill the gap with powder wax,
Thereafter, the whole is uniformly heated by high-frequency heating or in a vacuum furnace to completely melt the brazing material (see Fig. 3), so that the brazing material 3 completely wraps around the gap. At this time, a larger amount of brazing material 3 is poured into the gap formed in the groove 1. After that, the upper surface is ground and polished, and as shown in Figure 4, the band fabric 4. The ceramic member 2 and brazing material 3 are taken out in the surface position.

In the above embodiment, a ceramic member is used, but other super hard alloys such as tantalum carbide, titanium nitride, or tungsten carbide may also be used.

〔effect〕

As described above, by the method of the present invention, it is possible to easily decorate durable ceramics or ultra-hard materials, and to use it as a brazing material with 1.8
By using K yellow gold, you can get 3 tones, and by using white gold for 18, you can get 2 tones.
It made it possible to supply tone.

[Brief explanation of the drawing]

Figure 1 C('), Cb) is a front view and side sectional view of the grooved band, Figure 2 is a perspective view of the ceramic member to be inserted into the groove, and Figure 3 is the brazing material. FIG. 4 is a side sectional view of the band piece when melted, and FIG. 4 is a side sectional view of the band piece after its upper surface has been ground and polished. 1...Groove portion 2...Ceramic member 3...Raw material 4...Band fabric

Claims (1)

[Claims] Grooves are machined into the exterior parts of watches made of stainless steel,
A member made of a highly heat-resistant material such as ceramic or super hard alloy is set in the groove, and gold or silver brazing material is poured between the stainless steel material and the ceramic or super hard alloy, or brazing material powder is poured into the groove. The material is filled and heated to melt the brazing material and fill in the gaps.Then, it is ground and polished until the ceramic or super hard alloy is exposed, giving it a three-tone appearance of stainless steel, brazing material, ceramic, or super hard alloy. A method of manufacturing an exterior part for a watch, characterized by: