JPS6129599A - Method of patterning surface of metallic plate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method for patterning the surface of a metal plate.

The patterned metal plate obtained by the present invention is useful as a reflective plate for projecting the pattern onto a wall surface, etc. and for projecting images, and is also useful as a reflective plate for projecting images on the interior and exterior walls of buildings, ceilings, pillar wrappings, wainscoting, and door frames. It is also useful as a decorative panel for composing wall paintings and fittings.

[Problems with conventional technology]

A method of coloring or adding a color pattern to the surface of a metal plate is to treat the surface with paint, dye, ink, etc., but the surface with these colored patterns has a low reflectance of light. Therefore, even if sunlight or the like is irradiated and the reflected light is projected onto a wall surface, the pattern on the board surface cannot be projected onto the wall surface as a clear icon.

[Problem of invention]

The present invention provides a method for patterning a metal plate surface by using the metal plate surface as a reflective surface and by projecting the pattern formed on the surface as a clear image onto a wall surface or the like.

[Technical means and effects]

The method of patterning the surface of a metal plate according to the present invention is to form an engraved pattern on the back side of a metal plate whose front surface is a glossy surface, and then create an inverted pattern (mirror image pattern) of the engraved pattern. It is characterized by the fact that it appears as a glossy pattern on the front surface.

The engraving pattern on the back side of the metal plate can be formed by a chemical method in which a mask is applied by printing or the like according to the desired pattern, and the exposed parts are etched with a corrosive solution, or by →Yopress. This may be done by a mechanical method of inscribing the carved pattern with a die or a knife. The required depth of the engraving pattern varies depending on the thickness of the metal plate and the material of the metal plate, but when the target is a metal plate with a thickness of about 2n or less, the depth of the engraving pattern by chemical method is about 50 to 500 μm, Even in the case of a carved pattern by a conventional method, the thickness may be about 50 to 500 μm.

When an engraved pattern is formed on the back surface of a metal plate by the method of the present invention, the inverted pattern of the engraved pattern on the back surface appears as a glossy pattern on the front glossy surface. Also,
When the front surface of the metal plate is used as a reflective surface and sunlight is irradiated and the reflected light is projected onto the wall, a black image of the same pattern as the engraved pattern on the back is projected onto the wall.

As shown above, an inverted pattern of the engraved pattern on the back surface appears as a glossy pattern on the front surface of the metal plate, and when the front surface is used as a reflective surface and light is projected onto the wall surface, a pattern that is the same as the engraved pattern appears. The reason why a black image is displayed is that as the engraved pattern is formed on the back side, machining distortion occurs on the front surface along the pattern, and light is diffusely reflected on the surface of the part with the machining distortion, and the other parts are This is probably due to regular reflection on the surface of the part.

The metal plate used in the present invention may be made of various ferrous or non-ferrous metals such as common steel, special steel, aluminum or its alloy, copper or its alloy, etc., regardless of its material. When forming an engraved pattern on the back side of a metal plate by chemical etching, use a ferric chloride solution for ferrous metals, such as stainless steel, a nitric acid solution for copper and copper alloys, and a caustic solution for aluminum. Each Eida solution may be treated as a corrosive solution.

Among the various metal plates mentioned above, stainless steel plates are preferably used because they have excellent corrosion resistance and can easily form a glossy surface. Stainless steel plates are also suitable as decorative plates and reflective plates because they can be colored in various hues and tones by a coloring method called the Inco method.

The metal plate used in the present invention may have a glossy surface simply polished to a mirror surface, or may be colored naturally to a desired shade. Also,
By the method of the present invention, after a reverse pattern of the engraved pattern on the back surface is made to appear as a glossy pattern on the front surface, a natural color development treatment can be performed. For example, when using a stainless steel mirror polished plate or bright annealed plate, before or after forming the carved pattern on the back side,
By immersing the material in a chromic acid-sulfuric acid mixed aqueous solution for an appropriate time using the Inco method, it is possible to form color patterns in various hues such as blue, gold, red, or green by adjusting the immersion time. In addition, as well known, the coloring process includes the black dyeing method, which changes the mixing ratio of chromic acid and sulfuric acid to develop the desired color tone from a pale blank to deep black, and the black dyeing method, which changes the mixing ratio of chromic acid and sulfuric acid to develop the desired color tone from a pale blank to deep black. By masking with acid-resistant ink and performing color development treatment, it is possible to appropriately implement a technique such as a step dyeing method that forms a color pattern consisting of a combination of a plurality of different hues and tones on the surface. Unlike surfaces colored with paint or dye, when a metal surface is faded due to natural coloring, it retains its metallic tone and has a high reflectance of irradiated light, making it useful as a projection reflector. When reflected light is projected onto a wall, it is possible to project a pattern that is the same as the pattern on the back, using the colored background as a background. The same applies when a glossy pattern is formed on a colored metal plate.

〔Example〕

Mirror-polished stainless steel plate (SUS43) with a thickness of 1.5fi
0) was etched with a ferric chloride solution to etch a floral pattern with a depth of 120 μm. On the front side of the board, the reverse pattern of the etched pattern on the back side is visible as a glossy pattern. The front surface of this board is irradiated with sunlight at an incident angle of approximately 45"), and the reflected light is approximately 50 cm.
When projected onto a light-blocking wall 1 m away, a black icon with the same pattern as the engraved floral pattern on the back was projected onto the wall against a colorless and transparent background.

Otabi Yushu board thickness 1. ON's bright annealed stainless steel plate (SUS3
04) was etched with a ferric chloride solution to etch a 100μ deep tortoiseshell pattern, and then colored using the Inco method (mixed acid solution dichromic acid 250g#).
! Then, 490 g of sulfuric acid was applied to develop a gold color.

On the front surface of the obtained metal plate, an inverted pattern of the etched tortoiseshell pattern on the back surface is visible as a glossy pattern. When sunlight is irradiated onto the front surface of this board (at an incident angle of approximately 45°) and the reflected light is projected onto a shaded wall approximately 40 cm away, the etched pattern on the back surface appears against a gold-colored background. The same pattern of tortoise shell was projected as a black image.

Example 3 A lattice pattern with a depth of 130 μm was engraved with a press mold on the back surface of a mirror-polished red copper plate (10% zinc-copper) with a thickness of 1.5H. On the front surface of the obtained metal plate, an inverted pattern of the lattice pattern on the back surface is visible as a glossy pattern. The front surface of this board should be irradiated with sunlight at an angle of incidence of approximately 45°)
When the reflected light was projected onto a light-shielded wall about 60 cm away, a grid pattern with the same pattern as the engraved pattern on the back was projected onto the wall as a black image against a copper-colored background.

Example 4 The back surface of a mirror-polished 6161 corrosion-resistant aluminum plate with a thickness of 0.8 tm was etched with a caustic soda solution to form a scale pattern with a depth of 100 μm. On the front surface of the obtained metal plate, an inverse pattern of the etched pattern on the back surface is visible as a glossy pattern.

The angle of incidence is approximately 45° to irradiate the front surface of this board with sunlight.
), and when the reflected light was projected onto a light-shielded wall approximately 5 Qan away, a black scale pattern with the same pattern as the etched pattern on the back surface was projected.

Extensive machining 2.0 fin mirror polished stainless steel plate (SUS430
) was colored blue using the parakeet method, and then the back side was etched with a ferric chloride solution to a depth of 150 μm.
I engraved a pattern of a car named M.

On the front surface of the obtained metal plate, an inverse pattern of the etched pattern on the back surface is visible as a glossy pattern. This board is installed at an angle of 45 degrees to the ground, and at night, strong artificial light is irradiated onto the front surface from vertically above, and the reflected light is reflected from an object placed vertically on the ground at a distance of about 7 m. By projecting it onto the front surface, an enlarged black image of a car pattern similar to the etched pattern on the back surface was projected against a blue background.

〔Effect of the invention〕

According to the present invention, by chemically or mechanically forming an engraved pattern on the back surface of a metal plate, a reverse pattern of the engraved pattern on the back surface can be made to appear as a glossy pattern on the front surface. Moreover, the surface can be colored with a single color by natural coloring or the like, or a color pattern with a plurality of shades/tones can be applied.

The metal plate obtained by the present invention can be applied to industrial design using light in architectural spaces or outdoors, such as as a reflecting plate to project patterns and images on the surface onto a wall or the like. In addition, the metal plate obtained by the present invention has a novel and unique design effect with a glossy surface pattern, so it can be used for interior and exterior walls of buildings, ceilings, elevator doors, pillar wraps, wainscoting, curtain boards, stair handrails, It is also suitable for decorative panels constituting Kasagi, murals, objects, fittings, etc.

Claims (4)

[Claims] (1) By chemically or mechanically applying an engraved pattern to the back side of a metal plate whose front surface is a glossy surface, a reverse pattern of the engraved pattern appears as a glossy pattern on the front surface. A method for patterning the surface of a metal plate. (2) The method for patterning the surface of a metal plate according to item (1) above, characterized in that after a glossy pattern appears on the front surface, a coloring treatment is applied to the front surface. (3) The method for patterning the surface of a metal plate as described in item (1) or item (2) above, wherein the metal plate is a mirror-polished stainless steel plate or a bright annealed plate. (4) The method for patterning the surface of a metal plate as described in item (1) or item (2) above, wherein the metal plate is a stainless steel plate that has been subjected to a coloring treatment.