JPH0427301B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for decorating the surface of metals such as aluminum and stainless steel with patterns such as letters and figures, and particularly relates to a method for decorating metal surfaces with three-dimensional patterns. .

Conventionally, as a method for forming a three-dimensional pattern on the surface of a metal such as aluminum, a method has been used in which an oxide film of alumite is provided on the surface and the alumite film is utilized. That is, in this method, a colored alumite film is formed over the entire surface of an aluminum plate, a desired pattern is drawn on the film with chemical-resistant ink, and in other words, the film is masked. After applying this, a convex pattern is formed by removing the film other than the masking portion using an etching solution. However, with this method, for example, if a gold-colored pattern is desired, the entire film must be formed to be gold, and therefore a large amount of gold coloring agent is required to be mixed in during film formation. This led to high costs. In addition, after removing the once-formed film leaving behind the pattern, it is often necessary to re-form a thin alumite film to color the exposed metal surface. When pressing a metal plate, this may peel off from the metal surface, so it is necessary to process the metal plate into the final product shape in advance and then decorate it one by one, which makes the process very complicated. It also had some problems.

The present invention was made in view of the above-mentioned circumstances, and its purpose is to be able to form a desired pattern three-dimensionally and beautifully on a metal surface, and to
It is an object of the present invention to provide a metal surface decoration method that can form such a pattern at relatively low cost and in a simplified process.

In order to achieve this object, the method according to the present invention involves partially printing a pattern using chemical-resistant or impact-resistant ink on a metal surface using a plate on which a desired pattern has been formed, and then etching or etching the surface. By polishing, parts other than the pattern are formed into a concave shape, and the pattern is formed into a convex part, and after removing the ink from the surface of the convex part, a primer coating is applied to the entire surface including the convex part, and the pattern is formed into a convex part. A first color layer is formed on the entire surface of the primer coating, and then a second color layer is formed only on either the convex portion or the concave portion using the plate used in the partial printing. It is something to do.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the decoration method according to the present invention, first, desired characters,
Using a plate (not shown) on which a pattern 2 such as a figure has been formed in advance, the pattern is partially printed by offset printing or other printing means (see FIG. 1). This printing requires the use of ink that is chemical resistant, impact resistant, or abrasion resistant, and varies depending on the treatment method for surface 1 described later, but in the case of chemical treatment with acid or alkali, polyester In the case of mechanical processing such as sandblasting or hairline processing, an impact-resistant ink such as epoxy or urethane is used.

Next, when the surface of the metal plate 1 on which the pattern 2 is formed is chemically etched with acid or alkali or mechanically polished by means such as sandblasting, the surface of the metal plate 1 is coated with the above ink. The pattern 2 is formed in a concave shape except for the pattern 2 printed by the method, and the pattern 2 portion is formed as a relatively convex portion by the amount that the other portions are concave (see FIG. 2).
After forming the pattern 2 as a convex part in this way, the ink adhering to the surface of the convex part is removed using a remover to expose the metal surface, and then the entire surface of the metal plate 1 including the convex part is removed. A primer coating 3 made of a thermosetting resin such as an epoxy resin is applied to the surface to form a film for holding a color layer to be described later.

Thereafter, a first color layer 4 is formed over the entire surface of the primer coating 3 by an appropriate printing means such as offset printing.
The colored layer 4 is formed using ink colored to match the desired color of the surface portion excluding the pattern (convex portion) 2, and in the illustrated embodiment, the lower layer 4a is formed of ink colored gold, for example. and an upper layer 4b laminated on the lower layer 4a using ink mixed with pearl essence.

In this embodiment, after forming the first color layer 4 in this way, the second color layer 5 is applied only to the pattern (convex portion) 2.
is laminated on the first color layer 4 and printed. In printing this second color layer 5, the plate used for partial printing of the pattern 2 described above is used, and as a result, the second color layer 5 is shifted onto the upper surface of the convex portion 2 on which the pattern is formed. Accurately positioned and formed. Further, it is preferable to form the second color layer 5 using ink colored in a different color from that of the first color layer 4 from the viewpoint of decorative effect.

After the decoration with the first and second color layers 4 and 5 is applied as described above, these decorations are covered with a top coating 6 of a transparent synthetic resin such as acrylic. 6 may be formed into two layers. The metal plate 1 that has undergone these steps is then cut to match the dimensions of the final product and processed into a desired shape using a press to obtain the final product 10.

Therefore, according to the method according to the present invention, the second color layer 5 is printed using the plate used for partially printing the pattern.
Therefore, the pattern can be accurately positioned and formed on the upper surface of the convex portion 2 on which the pattern is formed without shifting. In addition, since it is possible to cut and process the metal plate 1 into the shape and dimensions of the final product after decorating it, it is easier to decorate than in the case where the metal plate 1 is previously processed into a predetermined shape and then decorated one by one. It becomes possible to perform the process much more efficiently. moreover,
The pattern is printed directly on the surface of the metal and then the parts other than the pattern are etched or polished to make the pattern convex, so there is no need to form an alumite film as in the past, reducing costs. and can contribute to the simplification of the process.

If desired, hairline processing or spin processing may be applied to the surface of the metal plate 1 in advance, and when a colored layer and a coating layer are formed by the above method, the pattern resulting from these processings will be combined with the colored layer. If it is desired to further enhance the decorative effect or increase the gloss, it is possible to previously provide a vapor deposited layer on the surface of the metal plate 1 or to electrolytically polish the surface. Furthermore, by performing the partial printing using several types of inks with different strengths, that is, several types of inks with different degrees of chemical resistance or impact resistance,
The areas printed with low-strength ink are slightly etched or polished, making it possible to form patterns with varying three-dimensional effects.

In addition, metal product 1 formed as described above
0, since the convex portion 2 corresponding to the pattern is integrated with the metal plate 1, it does not deform after decoration, and a decoration with a clear three-dimensional effect can always be obtained.

By the way, in the above embodiment, the second color layer 5 is formed only on the convex portion 22, but conversely, the second color layer 5 may be formed only on the portion other than the convex portion (the concave portion). good. In that case, the second color layer can be accurately formed by inverting the plate used for partial printing and printing.

As described above, in the metal surface decoration method according to the present invention, after partially printing a pattern with chemical-resistant or impact-resistant ink on the metal surface using a plate on which a desired pattern has been formed, the surface is etched. By carving or polishing, parts other than the pattern are formed into a concave shape, and the pattern is formed into a convex part, and after removing the ink from the surface of the convex part, a primer coating is applied to the entire surface including the convex part. , a first color layer is formed on the entire surface of the primer coating, and then a second color layer is formed only on either the convex portion or the concave portion using the plate used in the partial printing. As a result, it is possible to form a desired three-dimensional pattern on the surface of metal beautifully and at a relatively low cost using a simplified process.
It can produce excellent effects.

In addition, the metal products manufactured by the method of the present invention can maintain clear decorations with a three-dimensional effect semi-permanently without deforming the pattern, and are therefore particularly suitable for use as components of cosmetic containers. It is suitable for

[Brief explanation of drawings]

1 and 2 are schematic diagrams for explaining a metal surface decoration method according to an embodiment of the present invention, and FIG.
The figure is a perspective view showing a metal product manufactured by the method of the present invention, and FIG. 4 is a sectional view of the main part of the product. DESCRIPTION OF SYMBOLS 1... Metal plate, 2... Pattern (convex part), 3... Primer coating, 4a, 4b... First color layer, 5... Second color layer.

Claims (1)

[Claims] 1. After partially printing a pattern using chemical-resistant or impact-resistant ink on a metal surface using a plate on which a desired pattern has been formed, parts other than the pattern are etched or polished. The pattern is formed in a concave shape and the pattern is formed in a convex portion, and after removing the ink on the surface of the convex portion, a primer coating is applied to the entire surface including the convex portion, and a first color layer is formed on the entire surface of the primer coating. A method for decorating a metal surface, comprising: then forming a second color layer on only one of the convex portions and the concave portions using the plate used in the partial printing.