JPS5883290A - Watch case - Google Patents

Abstract

PURPOSE:To reduce the number of polishing steps because the surface part of an electroforming shell layer is virtually identical to the real model with a watch case obtained by using the metallic shell electroformed by using an electroforming matrix transferred faithfully with the surface of the watch case and casting metallic solder into said shell. CONSTITUTION:An electroforming matrix 1 is made of a non-metallic material and complies with the shape of a watch case. Its specular surface part is finished to a specular surface and seams are formed by faithful tracing of seam finishes. A conductive film 2 is obtained by a silver mirror method, a vapor depositing or sputtering method or an electroless plating method. Such electroforming mold is put in a plating layer and an electroforming shell obtained by subjecting the same to an electroforming treatment is removed from the electroforming matrix and the watch case is produced by casting metallic solder thereon. 4 denotes the metallic solder.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a watch side whose surface portion is a metal layer of an electroformed shell obtained by one casting, and which is obtained by pouring a metal solder into the shell.

More specifically, a shell is obtained by electroforming using a casting mold that faithfully transfers the inner and outer diameter surfaces of the watch side, and then a metal solder is poured into the mold to ensure sufficient strength for practical use. It is provided to the 1llf world for watches.

Conventional watch parts are generally manufactured through forging, cutting, and polishing processes, each of which requires a large number of man-hours. 41! &C, Considering recent trends such as small-lot production and shorter model life cycles, the mold allowance for forging is increasing for one side, which is a factor in increasing costs for watches. . Furthermore, there is currently a desire to rationalize the polishing process, which reduces the cost of Confucian manufacturing. Therefore, the present inventors have attempted to provide a watch side that largely eliminates these drawbacks and has an increased variety of models.

To be more specific, the present invention uses one complete watch side body, and uses it [? This is the watch side, in which a metal solder is poured into the electroformed shell obtained by making a suitable electroforming mother mold, applying conductive treatment to the mold in the evening, and further electroforming.
It is inexpensive and can be obtained, and the FC/dF side has properties such as high hardness and excellent corrosion resistance, and also has the characteristics that it can be freely and easily manufactured into complex models. be.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing the process of manufacturing the watch side of the present invention, and FIG. 2 is a sectional view of the watch side of the present invention.

First, 1 is a 1M electroforming mother mold. The material is a non-metallic material such as base resin or rubber. This one mold corresponds to the shape of the watch side, and the mirror surface part has a serpentine finish, and the streaked part is a faithful trace of the streaked finish.

Naturally, the dimensions of the inner and outer diameters of the sides are obtained.

2 is a conductive film, which is essential for electroforming.

This conductive film can be formed using the known silver mirror method, vapor deposition or sputtering method.
It can be obtained by the 1-ring method, the electroless method, and the Ki method. One such mold is placed in the plating layer and subjected to 11M# treatment.

This electroformed metal is Au, Ag, or Ou.

Ni, Or, etc., or alloys such as dAu alloy, N1-P alloy, etc. are generally used. The thickness of the obtained gold-bronze shell increases with the passage of time, but the inventors
I think that a thickness of 50 μm or more is preferable. If it is less than that, 1. This is because when removing the cast shell, the shell may break due to insufficient strength.

Figure 2 is a diagram in which the metal casting shell was removed from the electroforming mother mold and metal solder was poured into it. 4Fi metal solder. The metal solder is Au wax, Ag wax, (3U wax, Ni wax, etc.), but Ag wax, Ou wax, etc., which have poor corrosion resistance,
It is necessary to plate the exposed parts of the solder with good corrosion resistance.

As described above, the present invention clearly transfers the surface of the watch side.
The watch side is obtained by pouring gold wax into a metal shell electroformed using a CW casting mold.As can be seen from the examples, there is no need for expensive forging molds, and the cost is small. It is now possible to flexibly respond to other models, and the conventional manufacturing method (a manufacturing method that includes forging, cutting, and polishing processes)
It provides the world with a cheaper watch side. Furthermore, the surface of the electroformed shell layer obtained is almost in a state similar to that of this model, and polishing can be completed with a light puff, reducing the number of polishing steps.

In addition, if hard chrome is used for the electroformed metal, the watch side will be extremely scratch resistant and have a semi-permanent luster.Also, if a 18-grade gold alloy is used, the metal solder f9K used inside
By using a wax with a low gold phase such as No. 14, it is possible to manufacture an inexpensive gold alloy watch side.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the process of manufacturing the watch side of the present invention, and FIG. 2 is a cross-sectional view of the watch side of the present invention. 1...4 to *4 matrix 2...conductive, chemically treated coating 5...electroformed shell 4...metal brazing and above Applicant Hamazawa Co., Ltd. Kogyo Co., Ltd. Suwa Seikosha Agent Patent Attorney Tsutomu Mogami 486- Page 1? λ cause

Claims (1)

[Claims] The watch side has an electroformed metal layer obtained from 1 casting on the surface, and a gold solder in the center.