JPS5837191A - Production of decorative surface - Google Patents

Abstract

PURPOSE:To obtain a decorative surface having improved abrasion resistance in printed parts by printing characters, patterns, etc. by using non-conductive ink on the surface of a blank material, at least the surface whereof consists of a conductive material, then applying electroplating on the parts other than the printed parts. CONSTITUTION:After a blank material 4 for a decorative button or the like consisting of metals such as iron, Al or the like or a conductive synthetic resin is degreased, the material is chemically etched by a strong acid or the like, and prescribed patterns 5, etc. are printed on the surface thereof. Non-conductive synthetic resin ink of epoxy resins, polyester resins, etc. is used for the printing. Electroplating is applied on the material 4 printed on with the patterns 5, etc. The conductive parts other than the printed parts which are non-conductive are plated with, for example, a gold plating layer 6 or the like. Materials of which the surfaces are treated with a conductive material may be used for the material 4.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a decorative surface that can improve the abrasion resistance of a printed portion of a decorative article or the like.

Conventionally, it has been known to print on the surface of synthetic resin materials or the surface of metal, but this can be applied to decorative items such as decorative buttons. When printed on a surface, it gives the impression of a flat surface to the viewer, and has the drawback that it is easily abraded because the printed portion protrudes above the base. For this reason, the selection of printing paint,
Alternatively, countermeasures such as applying a coating to the printed surface were required.

On the other hand, as shown in Fig. 1, in order to remove defects such as pits, two coats of paraffin are applied to the surface of the material lo in advance (Fig. 1-b), and scratches b are made on this paraffin 2. (
etching) to expose part of the surface of the material (Fig. 1-C).
), this part is i! ! For example, paint 3 is applied to the recess 1a with Vt<Fig. 1-C) from which paraffin has been removed.
There is a method to draw a pattern by pouring etc. (@Figure 1-f). However, according to this method, if the recess s1a is extremely narrow, it is difficult for the paint 3, etc. to flow to every corner, making it difficult to draw delicate patterns, and when the paint 3, etc. is injected, the paint 3, etc. There was a risk that @la would overflow.

This f14 mori was made in consideration of the above circumstances, and is a round object made of a conductive material, or a material whose surface has been treated with a conductive material, with letters or patterns printed using non-conductive ink. Then, by electroplating the above material to plate conductive parts other than the printed parts, it is possible to form a three-dimensional decorative surface and improve the abrasion resistance of the printed surface. The purpose of the present invention is to provide a method for manufacturing a decorative surface.

Hereinafter, the present invention will be described in detail with reference to the drawings.

Figure 2 shows the manufacturing process for decorative surfaces when the materials for decorative items are made of conductive materials.First, iron, brass, aluminum, zinc, and lead are used.

A material 4 such as a decorative button is formed using a metal such as tin or antimony or a conductive synthetic resin (FIG. 2-a).

When metal is used as the material 4, the above-mentioned metals or a low alloy alloy made of these metals are die-cast or centrifugally cast.

When a conductive synthetic resin is used, it is molded by a molding method such as injection molding or compression molding.

Next, the element #4 is degreased and chemically etched with strong acid, etc., and then a predetermined pattern 5 etc. is printed on the surface (FIG. 2-b).

This printing method involves screen printing using non-conductive synthetic resin ink such as epoxy resin, polyester resin, or acetate resin.

The pattern 5 and the like are printed by a method such as transfer printing or tab/bottom printing.

Then, the material 4 on which the pattern 5 and the like are printed is electroplated to form a plating layer 6. The plating process is as follows: Nickel plating for iron and brass → gold plating For low alloy metals, copper cyanide plating → sulfuric acid steel plating → nickel plating → gold plating Pretreatment for conductive synthetic resin → nickel plating → gold plating As a result, material 4 The conductive parts other than the non-conductive printed parts are plated with a gold plating layer 6 or the like (FIG. 2-C).

Next, Figure 3 shows the manufacturing process of decorative surfaces when the decorative material is made of non-conductive material such as synthetic resin.
For example, a material 4' such as a decorative button is formed by injection molding or compression molding using a synthetic resin such as ABS resin, urea resin, or polyester resin (
Figure 3-a). Then, this material 4' is subjected to surface treatment with a conductive material by the following process 5 (Fig. 3-b).
.

Surface preparation (dirt removal 1 → nip/g (chemical surface treatment) →
Activation imparting (sensitizing, activation/g)
→After adding chemical copper and chemical nickel and forming the conductor layer 7 by the above-mentioned electroless plating, the material 4'1! A pattern 5 is printed on the surface in the same manner as in the previous example (FIG. 3-). Next, the material 4' on which the pattern 5 has been printed is subjected to electroplating to form a plating layer 6 such as gold plating. The plating process for synthetic resin is sulfuric acid steel plating → nickel plating → gold plating.
The conductive parts of the material 4' other than the non-conductive printed parts are plated (FIG. 3-d).

As described above, according to the method for manufacturing a decorative surface according to the present invention, characters are formed by using a non-conductive infill on a material formed of a conductive material or a material surface-treated with a conductive material. Alternatively, by printing a pattern, etc., and then electroplating the above material to plate the conductive parts other than the printed part, it is possible to form a delicate and three-dimensional decorative surface. It is possible to improve the wear resistance of the part.

The present invention can be applied not only to ornaments such as decorative buttons, but also to electrical appliances, furniture, automobile parts, etc.

[Brief explanation of drawings]

@1 Figure (a) (b) (C) (d) (e) (f)
2 is a process diagram showing a conventional method of printing synthetic wood 11o Table IIK, and FIGS. 2(a), (b), and (c) are process diagrams showing a method of manufacturing a decorative surface of the present invention using a conductive material as a material. 3(Jl), (b), (c), and (d) are process diagrams showing the method for manufacturing a decorative surface of the present invention when a non-conductive material is used as the raw material. 4.4'...Material, 5...Pattern,
6... Plating layer, 7... Conductor layer. Figure 1 Figure 2

Claims (1)

[Claims] Print characters or patterns using non-conductive ink on a material made of a conductive material or a material whose surface has been treated with a conductive material, and then electroplating the material to print. 1. A method for producing a decorative surface, which comprises applying a coating to a conductive part other than the part.