JPH09176836A - Formation of hard ornamental film on product surface - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form a hard ornamental film difficult to scratch and capable of exhibiting a color tone in a wide range by using an ion plating technique. SOLUTION: SUS 304, etc., are used as the material 10 for a product, and the surface 10a is coated with the oxide, nitride and carbide of metal such as TiN and Crx Ny by ion plating to form a light reflecting hard film 11. TiO2 , etc., are then deposited and laminated on the hard film 11 by ion plating to form a transparent film 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to ornaments such as pendants and bracelets, exterior parts such as watch cases, and other products such as personal accessories, stationery, household items and toys. , A hard decorative film forming method for forming a hard decorative film by using an ion plating technique.

[0002]

2. Description of the Related Art Conventionally, as a method for forming a hard decorative film of this kind, as described in, for example, Japanese Patent Laid-Open No. 24425/1992, the surface of a product material is polished to form a reflective surface thereon. There are those which form a transparent film of SiC or a composite transparent film made of SiN and SiO ₂ on the reflecting surface.

[0003]

However, in such a conventional method, 1) light interference occurs between the light reflected by the reflecting surface of the product material and the light reflected by the surface of the transparent film, There is a problem that the color changes depending on the thickness of the transparent film. 2) When the transparent film is made thin to obtain a desired color tone, there is a problem that scratches are likely to occur. 3) The color tone of the transparent film depends not only on the refractive index and thickness of the transparent film but also on the reflectance and spectral characteristics of the reflecting surface thereunder. On the reflecting surface formed by polishing the surface of the product material, there are some colors that cannot be obtained even if the thickness of the transparent film is controlled due to its reflectance and spectral characteristics.
For example, in the case of a stainless steel material, there is a problem that a bright color with a strong transparency can be produced, but a dark color cannot be produced even if the thickness of the transparent film is controlled.

Therefore, the object of the present invention is to
It is to form a hard decorative film that is hard to be scratched and that can produce a wide range of color tones.

[0005]

Therefore, in the method for forming a hard decorative film on the surface of a product according to claim 1, first, as in the embodiment of FIG.
Then, a hard film 11 that reflects metal by adhering metal oxides, nitrides, and carbides by ion plating is formed, and then a transparent film 12 is laminated on the hard film 11 by ion plating. It is characterized by that.

The method of forming a hard decorative film on the surface of a product according to claim 2 is as follows, for example, as in the embodiment of FIG.
A metal oxide / nitride / carbide is deposited on the surface 20a of the product material 20 by ion plating to form a hard film 21, and then a metal is deposited on the hard film 21 by ion plating. It is characterized in that a light reflection film 22 is laminated and formed, and then a transparent film 23 is laminated and formed on the reflection film 22 by ion plating.

[0007]

Embodiments of the present invention will be described below. In the invention described in claim 1, for example, FIG.
As shown in, using SUS304 as the product material 10 _1, first, the product material 10 _first surface 10 ₁ a, to form a hard film 11 ₁ that reflects light by attaching a TiN ion plating, then The transparent film 12 ₁ is formed by laminating TiO ₂ on the hard film 11 ₁ by ion plating. In this embodiment, the hard film 11 ₁ improves scratch resistance and forms a light reflecting surface. By doing so, a color tone having a stronger yellowish tint than when TiO ₂ is directly attached to SUS304 can be obtained, and particularly an orange color can be brought out vividly.

[0008] Also, as shown in FIG. 4, also using SUS304 as the product material 10 _2, first, the product material 10 _{and second} surface 10 ₂ a, reflects light by attaching CrxNy ion plating forming a hard film 11 _2, then on the rigid film 11 _2, formed by laminating a transparent film 12 ₂ attached to TiO ₂ by ion plating. In this embodiment, the hard film 11 ₂ is made a whitish color, likewise form a reflecting surface of the light as well as improve the scratch resistance. By doing this, Ti can be directly added to SUS304.
An interference color having a lighter color tone than when O ₂ is added can be produced.

Next, in the invention described in claim 2, as shown in FIG. 5, for example, SUS30 is used as the product material 20 ₁ .
4, the surface 20 1a of the product material 20 ₁ is _first polished to a mirror surface. Then, on the surface 20 ₁ a,
Hard film 21 ₁ by attaching TiN by ion plating
To form If the hard film 21 ₁ is applied to a thickness of 5 μm or more, sufficient scratch resistance can be obtained. Next, Ti is attached to the hard film 21 ₁ by ion plating to form a light reflection film 22 ₁ in a laminated manner. Then, TiO ₂ is deposited on the reflection film 22 ₁ by ion plating to form a transparent film 23 ₁ as a laminate. By providing the reflective film 22 ₁ , it is possible to enhance the adhesiveness and to obtain a color tone almost the same as when the transparent film 23 ₁ is directly formed on the surface 20 ₁ a of the mirror-finished product material 20 ₁ .

[0010] Incidentally, the surface 20 ₁ a product material 20 _1, the hard film 21 _1, the reflective film 22 _1, to laminate a transparent film 23 ₁ is specifically an ion plating RF method Using Ti as an evaporation metal, N ₂ is introduced into the reaction gas as a first step to form a hard film 21 ₁ made of TiN, and Ar gas is introduced as a second step to form a reflection film 22 ₁ made of Ti. Then, as a third step, O ₂ is introduced into the reaction gas to form a transparent film 23 made of TiO _2.
To form a _1.

FIG. 6 shows an example in which brass pachinko nails are used as the product material 20 ₂ . In this embodiment, first, the product material 20 ₂ head surface 20 ₂ a, to form a hard film 21 ₂ by attaching TiN ion plating. Then, on the rigid film 21 ₂ is laminated a reflection film 22 ₂ by attaching Ti ion plating.
Finally, TiO ₂ is attached by ion plating and a transparent film 23 ₂ is laminated. In this embodiment,
The scratch resistance can be improved by forming the hard film 21 ₂ to have an appropriate thickness. In addition, the transparent film 2 directly on the brass
If 3 ₂ is attached, it is difficult to produce blue or magenta, but if the reflection film 22 _{2 of} Ti is formed as in this embodiment, blue or magenta can also be produced.

Further, in the invention described in claim 2, for example, as shown in FIG. 7, SUS3 is used as the product material 20 ₃ .
04, first, the surface 20 ₃ a of the product material 20 ₃
Then, TiN is attached by ion plating to the hard film 2
1 ₃ is formed. Next, TixOy is deposited on the hard film 21 ₃ by ion plating to form a dark gray light reflection film 22 ₃ on the hard film 21 ₃ . After that, the reflection film 22 ₃
A transparent film 23 ₃ is formed by laminating TiO ₂ on the upper surface by ion plating. In this embodiment, since the reflection film 22 ₃ has a dark gray color, it can have a darker and calmer color than when the transparent film 23 ₃ is directly formed on the surface 20 ₃ a of the product material 20 ₃ .

The reflective film 22 is made of Ti or Tix.
Other than Oy, a metal such as TiC or TiCN may be attached and formed.

[0014]

Therefore, according to the first aspect of the present invention, a metal having a predetermined reflectance and spectral characteristics is selected according to the color tone, and the hardness of the product material is taken into consideration. By forming a hard film with a predetermined thickness to obtain the desired scratch resistance, the product surface is less likely to be scratched,
Further, it is possible to form a hard decorative film capable of producing a wide range of color tones.

According to the second aspect of the present invention, in consideration of the hardness of the product material, a hard film having a predetermined thickness is formed so as to obtain a desired scratch resistance, and what kind of color tone is obtained. By forming a reflective film by selecting a metal having a predetermined reflectance or spectral characteristics, a hard decorative film that is not easily scratched and can produce a wide range of color tones is similarly formed on the product surface. You can

[Brief description of the drawings]

FIG. 1 is an explanatory view illustrating a method for forming a hard decorative film on a surface of a product according to the invention of claim 1.

FIG. 2 is an explanatory diagram illustrating a method for forming a hard decorative film on the surface of a product according to the invention of claim 2.

FIG. 3 is an explanatory diagram illustrating an embodiment of the invention described in claim 1;

FIG. 4 is an explanatory diagram for explaining another embodiment of the invention described in claim 1.

FIG. 5 is an explanatory diagram illustrating an embodiment of the invention described in claim 2;

FIG. 6 is an explanatory diagram illustrating another embodiment of the invention according to claim 2;

FIG. 7 is an explanatory diagram illustrating another embodiment of the invention according to claim 2;

[Explanation of symbols]

 10 ・ 20 Product material 10a ・ 20a Product material surface 11 ・ 21 Hard film 12 ・ 23 Transparent film 22 Reflective film

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinji Sawada 28-2-24 Izumi, Higashi-ku, Nagoya-shi, Aichi Ricoh Elemex Co., Ltd. (72) Eiji Okuno 28-2-24, Izumi, Higashi-ku, Nagoya-shi, Aichi No. Ricoh Elemex Co., Ltd.

Claims (2)

[Claims] 1. A hard film that reflects light by adhering metal oxides, nitrides, and carbides on the surface of a product material by ion plating, and then, by ion plating on the hard film. A method for forming a hard decorative film on the surface of a product, which is formed by laminating transparent films. 2. A hard film is formed by depositing metal oxides, nitrides and carbides on the surface of a product material by ion plating, and then a metal is deposited on the hard film by ion plating. A method of forming a hard decorative film on a product surface, which comprises laminating and forming a light reflecting film, and then laminating and forming a transparent film by ion plating on the reflecting film.