JPH0453953B2 - - 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 then, in other words, masking is performed on the film. 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, if a gold-colored pattern is desired, for example, the entire film must be formed in a golden color, 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 with 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 coloring layer is formed on the portions of the primer coating corresponding to the convex portions using the plate used in the partial printing, and a plate obtained by inverting the plate used in the partial printing is used to form the primary color layer. A second colored layer is formed on the remaining portion of the coating by printing the plate described above in reverse.

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 10 (see FIG. 5b) on which a pattern 2 such as a figure has been formed in advance, the pattern 2 is partially printed by offset printing or other printing means (see FIG. 1). The plate 10 has a flat mesh, and after coating the mesh with a photosensitive liquid, a negative film 10N (10N) is prepared by photographing an original with letters "ABC" as shown in FIG. 5a, for example. The letters are transparent and the rest are black) is pasted on the mesh and exposed to light to burn the photosensitive liquid in the transparent part of the ABC letters onto the mesh, then the negative film 10N is removed and the photosensitive liquid other than the letters is washed with water. (see Figure 5b).

This printing requires the use of ink that is chemical resistant, impact resistant, or abrasion resistant, and varies depending on the surface 1 treatment method described below, but in the case of chemical treatment with acid or alkali, An acid-resistant ink such as a polyester-based ink or an alkali-resistant ink such as an acrylic-based ink is used, and in the case of mechanical processing such as sandblasting or hairline processing, an impact-resistant ink such as an epoxy-based or urethane-based ink 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.

Next, a first color layer 4 of a desired color is formed on the primer coating 3 in a portion corresponding to the pattern (convex portion) 2 by an appropriate printing means such as offset printing. The plate 10 used for printing the pattern 2 described above is used as it is, and thereby the first color layer 4 is formed accurately in a predetermined position and shape. After that, a second color layer 5 is applied to the remaining portion on the primer coating 3.
It is formed by printing using a plate 20 obtained by inverting the plate 10 described above. Version 20 is Figure 6a
The negative film 10N shown in Figure 6 is further photographed to create a positive film 10P (letters are black and other parts are transparent) as shown in Figure 6b.
After pasting 10P onto the mesh coated with photosensitive liquid and exposing it to the mesh, the photosensitive liquid other than the transparent part of the ABC letters is printed on the mesh. After that, remove the positive film 10P and wash the photosensitive liquid on the letters with water. (see Figure 6c). By using the plate 20 obtained by reversing the plate 10 used for printing the first color layer 4, the color layer can be completely provided on the primer coating 3, and the first color layer 4 and the second painted color layer 5 are eliminated, making it possible to accurately highlight the pattern 2. In addition, the first color layer 4 and the second color layer
It is preferable to form the coating layer 5 using an ink having a different color or shade from the viewpoint of decorative effect.

In the above-mentioned embodiment, the second color layer 5 was formed after forming the first color layer 4, but in contrast, the second color layer 5 was formed first and then the plate was formed again. There is no problem in providing the first color layer 4 using an inverted version.

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 transparent synthetic resin such as acrylic. The coating 6 may be formed in 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 present invention, after the metal plate 1 is decorated, it can be cut and processed into the shape and dimensions of the final product. The decoration process can be performed much more efficiently than when decorating one sheet at a time. In addition, since the pattern is printed directly on the surface of the metal and the parts other than the pattern are etched or polished to make the pattern convex, there is no need to form an alumite film as in the conventional method, which reduces costs. This can contribute to reducing the amount of damage and simplifying the process.

In addition, when hairline processing or spin processing is performed on the surface of the metal plate 1 in advance in the desired area, and when the coloring layer and coating layer are formed by the above method, the pattern resulting from these processings will be different from the coloring layer. In order to further enhance the decorative effect or to increase the gloss, it is possible to provide a vapor deposited layer on the surface of the metal plate 1 in advance or to electrolytically polish the surface. In addition, 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 inks with low strength are slightly etched. Alternatively, since it is subjected to a polishing action, it is also possible to form a pattern with a variable three-dimensional effect.

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.

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 engraving 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. , forming a first color layer on the entire surface of the primer coating, and then forming a second color layer only on either the convex portion or the concave portion using the plate used in the partial printing; As a result, a desired three-dimensional pattern can be beautifully formed on the surface of metal at a comparatively low cost through a simplified process, and other excellent effects can be achieved. .

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 the drawing]

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, FIG. 4 is a sectional view of the main part of the product, and FIG.
The figure shows the process of forming a plate from a negative film, and FIG. 6 shows the process of forming a plate from a positive film. DESCRIPTION OF SYMBOLS 1... Metal plate, 2... Pattern (convex part), 3... Primer coating, 4a, 4b... First painted layer, 5... Second painted layer, 10, 20... Plate.

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 on a convex part, and after removing the ink on the surface of the convex part, a primer coating is applied to the entire surface including the convex part, and a part of the primer coating corresponding to the convex part is coated with a primer. A first colored layer is formed using the plate used in the partial printing, and a second colored layer is formed on the remaining portion of the primer coating by using a reversed version of the plate used in the partial printing. A metal surface decoration method characterized by: