JPS63446A - Coloring method for metallic decorative sheet - Google Patents

Abstract

PURPOSE:To enable the plural colorings of a metallic decorative sheet by a simplified process, by sticking a masking material whose prescribed parts are previously notched on a metallic sheet surface and then by allowing the parts of the metallic sheet surface corresponding to the above notched parts to be irradiated by an intensity-adjustable laser beam. CONSTITUTION:The masking material 14 prepared by making notches on a thin sheet of copper, etc., into figures to be colored, such as circular notches 14a, triangular notches 14b, etc., is stuck on a stainless sheet 1. Then the parts of the stainless sheet 1 corresponding to the above notches 14a, 14b, etc., are irradiated by the laser beam 19 by means of a laser-producing device 15, a prism 17, a lens 18, etc., to undergo heating. At this time, the intensity of the above laser beam 19 is varied by means of a beam intensity adjusting device 16. In this way, plural colorings can be formed on the surface of the stainless sheet 1 according to the heating degrees of the laser beam 19 with different intensities.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for producing a metal decorative board by coloring the surface of a metal plate.

[Conventional technology]

Conventionally, when coloring a metal decorative board, the metal plate surface is masked by attaching a vinyl film with predetermined portions cut out or by applying lacquer, and in this masked state, the metal decorative board is immersed in a coloring solution. The non-masked areas were colored.

FIGS. 3(a) to 6 show such conventional coloring methods.

In the figure, (1) is a stainless steel plate, and a stainless steel plate (1) with multiple 121U circular cutouts (2a) formed.
The masking material attached to (2b) is the cutout (2
Non-masking part of stainless steel plate +11 corresponding to (a), (another masking material with 31U triangular cutout (3a) formed, (3b) non-masking part corresponding to cutout (3a), ( 4) is a coloring liquid.

Next, two conventional coloring methods C will be described.

First, as shown in Fig. 3(,) and Fig. 4.

The masking material (2) with the cutout (2a) formed therein is attached to the stainless steel plate 11). The attached stainless steel plate (1) is shown in FIG.

Affects the coloring solution. At this time, the non-masking area (2b) comes in contact with the coloring liquid (4) and is colored in a predetermined color to form a circular spot pattern.

Furthermore, in order to color different parts of the stainless steel Wi4 version (11), remove the masking material (2) and attach another masking material (3) as shown in Figure 3 (b). At this time, 1 spotted pattern part (2b) is covered with masking material (3). In this state, dipped in coloring liquid (4) (2) to create a triangular spotted pattern. The spotted pattern is covered with masking material (3), so it is not affected in any way.

After coloring is completed, the masking material (3) is removed, as shown in FIG.

The circular spots and triangular spots can be colored differently.

[Problem that the invention seeks to solve]

The conventional coloring method has the problem that the coloring process must be repeated according to the number of colors to be colored as described above, and the process is complicated and time-consuming.

Furthermore, if the process is simplified, the types of colors that can be applied in one color are also limited, resulting in a problem that the pattern is monotonous and does not look good.

The present invention was made to solve the above-mentioned problems, and its object is to provide a coloring method that allows a plurality of colors to be applied through simple steps.

[Means to solve the problem]

What is the method for coloring decorative metal laminates related to this application?

After a masking material with a predetermined portion cut out is attached to the surface of a metal plate, the intensity of the laser beam is adjusted and the metal plate surface corresponding to the cutout is irradiated and colored.

[For production]

What is the method for coloring decorative metal laminates related to this application?

Laser beam irradiation (Secondly, it melts the surface of the metal plate or causes distortion in the crystal structure, changing the surface structure and coloring the metal plate in multiple colors without immersing it in a single coloring solution.

[Embodiments of the invention]

1 and 2 show an embodiment of this invention, 14
1 is made of a thin plate of copper, copper alloy, aluminum, etc., and has a circular notch (14a) and a triangular notch (14b) formed at once using a masking material that shields laser beams. Q
5 is a laser generator that generates laser beam α9, αe
d8 is a beam intensity adjusting device that adjusts the intensity of the laser beam 1fi3, and a prism is used. d8 is a lens that focuses the laser beam σ9 on the surface of the stainless steel plate (1).

Next, the coloring method according to the present invention will be described. First, a pattern to be colored is drawn on the masking material and cut out all at once. The masking material (14114) shown in Fig. 2 is made by forming the notches formed in two sheets of conventional masking materials (2) and (3) all at once.This masking is attached to the stainless steel plate (11). It is constructed as shown in Figure 2.

The cutout part (1
4a) and (14b) are irradiated with a laser beam (19) and heated. During this heating.

This irradiation changes the intensity of the laser beam α9 from the light beam 51 degree adjustment device U former II.
a) and (14b) corresponding parts are heated.

Furthermore, this heating can be performed at any strength.

When the surface of the stainless steel plate (1) is heated, one surface melts or distortion occurs in the crystal lattice. The degree of melting and the degree of distortion vary depending on the strength of heating. Due to changes in the surface structure due to heating, the irradiated and non-irradiated areas develop different colors. Furthermore, even in this irradiated area, the part affected by the strong laser beam α9 and the weak part are colored differently.

That is, according to the present invention, although the irradiation work with the laser beam a9 is included, the number of times the masking material side impregnation work is reduced and the immersion work in 9 coloring liquid + 41 can be omitted, and the irradiation work and the immersion work can be reduced by the number of colors. This simplifies the process compared to the conventional method, where the process was repeated half the number of times.

In particular, the arrangement of the masking material I is such that the cutouts (14a) (14
The placement of b) directly affects the appearance, so care must be taken. This reduction in the number of times of attaching work also makes it easier to make the product itself.

In addition, since a laser beam is used, the border between the irradiated area and the non-irradiated area is clear, and the outline of the pattern becomes clear. Also, if the masking material is removed and immersed in a coloring solution, that part can be colored.

〔Effect of the invention〕

As described above, in this invention, after attaching the masking material with a predetermined portion cut out to the metal plate surface, the laser beam irradiates the metal plate surface at the portion corresponding to the cutout portion without adjusting the intensity of the laser beam. The structure of the metal plate surface changes due to the intensity C2 of the laser beam, making it possible to color the metal plate in multiple colors with one immersion, eliminating the need to repeat the application of masking material and immersion in the coloring liquid, simplifying the process. could be done

[Brief explanation of drawings]

1 and 2 show a method of coloring a metal plate according to the present invention, with FIG. 1 being an overall configuration diagram and FIG. 2 being a plan view showing a part of the metal plate to which a masking material has been attached. 3(a) to 6 show conventional examples, and FIG. 3(a) and FIG. 3(b) are plan views showing a part of the metal plate before U coloring;
4 is a sectional view taken along the line IV-W in FIG. 3(a), FIG. 5 is a sectional view showing the coloring process, and FIG. 6 is a plan view showing a part of the metal plate after coloring. In the figure, (1) is a stainless steel plate, (4) is a coloring liquid, and 114
(14a) and (14h) are cutout parts, US is a laser generator, αB is a beam intensity adjustment device, αD (prism, lens, +19 is a laser beam. Note that the same line numbers in Figure 1) Indicates the same or equivalent parts.

Claims (1)

[Claims] A step of attaching a masking material made of a material that shields laser beams and having predetermined portions cut out to the metal plate surface, and applying a laser beam whose intensity can be adjusted to the portions of the metal plate surface corresponding to the cutout portions. A method for coloring decorative metal laminates, which consists of an irradiation process that adjusts the intensity of irradiation.