JPS5947385A - External parts for pocket timepiece - Google Patents

Abstract

PURPOSE:To obtain the titled high quality parts each having a unicolored or multicolored pattern, by heat treating parts coated with a soln. contg. >=1 kind of metallic element among Li, Be, B, C, Na, Mg or Al. CONSTITUTION:A soln. contg. >=1 kind of metallic element among Li, Be, B, C, Na, Mg, Al, Si, P, S, K, Ca, Sc, Ti, V or Cr is prepared. External parts for a pocket timepiece are coated with the soln. and heat treated to produce a color tone peculiar to the oxide, nitride or carbide of the metal. Each of the surface treated parts has a unicolored or multicolored pattern of high quality.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an exterior part for a portable watch that is coated with a metal solution and subjected to a heat treatment to be colored in one color or in multiple colors.

Conventionally, the surface coloring of a molded product with metallic luster was J+f1. i
The metal film is formed by vapor-depositing a gold kite.

The colors used for this purpose are gold, white, grey-black, light brown, and black9.
Colors such as evening and yellow are used. Especially often used are
It is gold and white in color. These color tones are often monochromatic, and the tone is simply created by the shading of the color. Moreover, it has poor abrasion resistance, is prone to lag, and tends to lose its surface gloss. For this reason, it is extremely difficult to maintain the original color tone.

The purpose of the present invention is to take advantage of the known characteristics of metals, such as their inherent wear resistance and corrosion resistance, while also achieving characteristics such as a wide range of pre-existing flexibility and high mass productivity that could not be obtained with the dual method. The present invention relates to a beautiful exterior part for portable use that has a high quality Φ color or a multicolored pattern that meets customer tastes.

That is, the present invention provides a mobile watch case (
In this method, a metal alkoxide solution (hereinafter abbreviated as "case") is coated and heat treated to form a metal oxide film, nitride film, and carbide film, thereby manufacturing a case with a monochrome or multicolor pattern. Here, the case may be made of the same metal or an alloy of stainless steel, brass, or nickel silver.

Metal alkoxides are represented by the general formula M(OR)x, where M includes At, Ti, 'V, Or, Fe, Ta, etc., and R includes methyl, ethyl, butyl, propyl, and the like.

Let us explain the invention in more detail. The case base material exhibits various colors by changing the conditions of surface treatment such as anodization. However, although these colors generally form a thin film, they have poor abrasion resistance, poor adhesion, and the surface treatment film peels off. In order to prevent this drawback, in the present invention, the thick phase is cut into a case, and after that, a mirror finish or a satin finish is applied, and then a metal alkoxide solution is applied. When applying, it is mainly applied uniformly in a thin film by methods such as brushing, spraying, and screen printing. The case of metal alkoxide coating is to form monochrome or multicolor patterns by taking advantage of the unique color tones of metal oxides, nitrides, and carbides by performing heat treatment after drying.

Next, the present invention will be explained in detail.

Embodiment Figure 1 is an example of a case with a multicolor pattern using the present invention.
Improper tool solution of isopropoxide and (J T
Figure 1 (1) of the propatool solution of h-propoxide.
Apply to l (2) l (3) respectively. The coated case is heat treated according to the heat treatment conditions shown in FIG. First, the above-mentioned filter metal is opened by drying in (A,), firing in (A,), reduction in (A3), and nitriding or V1 carburizing in (A4). , t or form a carbonized film. This nitride film is TiN golden yellow, NbN pale yellow,
TaNjν [color or carbide,! V↓Ti (3 black silver,
Forms a multicolored pattern of N'bO purple and TaO golden yellow. This multicolored appearance is completely satisfactory compared to the color tone of the film produced by ion brate ink. In addition, a comparative study of the hardness test by two people] and the salt water jet test yielded satisfactory results as shown in Table 1.

◎Very Good ○Good △Slightly Good According to the present invention, by applying a metal alkoxide solution and performing heat treatment, it is possible to freely design multicolored patterns, and to form a high quality metal colored film with high mass productivity. can.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an example of forming a multicolored metal pattern on a case, and FIG. 2 is a graph showing mutual control ranges of heat treatment temperature and treatment time. 1 to 3 are metal nitriding) 1, carbide film, 4 is case, A1 is drying treatment, A, &:, ], ・su°ε formation treatment, A
3 is reduction treatment, A4 is chemical treatment or lql, carbonized film ■
1! Applicant Daini Seiosha Co., Ltd. Agent Patent Attorney Tsutomu Mogami

Claims (2)

[Claims] (1) Exterior parts for mobile watches characterized by having a single color or multicolor by applying a metal solution and applying heat treatment. (2) The metal elements of the metal solution are Li, Be, B, 0, and N.
a, Mg, A7. Si, P, S, Oa. Sc, Ti, V, Or, Mn, Fe, Oo, Nie O
u y Z n * G a e G e H A s
t S e Rb eSy, Y, Zr, Nb, MO
, Cd, Eng, Sn, Sb, To, Cs, Ba, La,
Hf, Ta. W, Hg, T7. Pb, Bi, Oe, Pr, Nb, Pm
, Sm, Eu, , Gd, Tb, Dy, Ho. The exterior component for a portable watch according to claim 1, characterized in that it contains one or more of Kr, Tm, Yb, Lu, Th, Pa, U, and Pu.