JP4047111B2 - Anodized film pattern coloring method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pattern coloring method for an anodized film in which a pattern is colored on an anodized film of a metal such as aluminum or a metal alloy such as aluminum.
[0002]
[Prior art]
Aluminum has excellent features such as light weight and good workability, and is widely used today in building materials such as aluminum sashes, vehicles, machine parts, cooking utensils, and housings of various electric products. In addition, titanium and titanium alloys are used for golf clubs and the like, and magnesium alloys are also attracting attention because of their excellent lightness, high rigidity, and thermal conductivity per unit density.
[0003]
For example, when coloring the above aluminum or aluminum alloy, the following method is employed.
(A) First, an aluminum oxide film is formed on the surface of aluminum by an anodic oxidation method in order to improve wear resistance and corrosion resistance. This procedure degreased, cleaned surface by treatment electrolytic polishing or the like, for example, in an electrolytic solution such as sulfuric acid or oxalic acid, aluminum electric current energized as an anode, to form an aluminum oxide film.
[0004]
In addition, a large number of electrolytic holes are formed on the surface subjected to the above-described treatment, and in order to impregnate the electrolytic holes with a dye and to provide weather resistance and gloss after sealing, a thermosetting resin such as acrylic or polyester is used. Use to coat.
[0005]
(B) A nickel salt can be added to an inorganic acid (for example, sulfuric acid) and anodized to form a colored oxide film to produce a monochromatic aluminum product.
[0006]
[Problems to be solved by the invention]
However, the conventional coloring method has the following problems.
First, in the example of (a), the dye impregnated in the electrolytic hole is one color, and only a monochromatic aluminum product can be produced. Therefore, it is not possible to produce a variety of aluminum products with a color pattern such as a wood grain pattern or a stone grain pattern by the above method.
[0007]
Further, in the above example (b ) , coloring is performed on the surface of the aluminum product. Therefore, particularly for building materials, fastness is required, which is unsuitable for temperature change, wear due to rain and the like, and the like.
[0008]
Therefore, in view of the above problems, the present invention impregnates the interior of the aluminum product with a plurality of dyes, not the surface of the aluminum product, and has a pattern such as a wood grain pattern or a stone pattern while ensuring fastness. An object of the present invention is to provide a pattern coloring method of an anodic oxide film that makes it possible to produce an aluminum product.
[0009]
[Means for Solving the Problems]
An object of the present invention, according to the first aspect of the invention, the processing you forming an anodic oxide film on the outer peripheral surface of the pot-shaped metal, the electrolytic holes formed in the surface of the metal by the process, pattern printed by a dye, a processing for Ru is Kutsugaechaku the film that is浮設the tank, pressing the outer peripheral surface of the metal of the pan shape on the film from above, the water pressure the dye film obtained by the Kutsugaechaku A pattern coloring method for an anodic oxide film, comprising: impregnating the electrolytic hole; after the treatment; removing the film; sealing the electrolytic hole after removing the film; and performing a clear coating process. Can be achieved by providing.
[0010]
Here, the electrolytic hole formed in the anodic oxide film is a hole formed when oxygen (O) generated on the surface of aluminum and aluminum (Al) are combined to generate aluminum oxide. Innumerable minute holes having a diameter of several hundreds of millimeters are formed on the surface.
[0011]
The film covering the aluminum plate in which the electrolytic holes are formed is printed. For example, a high-quality condensed dye is used, and a dye having excellent heat resistance, light resistance and the like is printed. Further, as the pattern, for example, a pattern such as a wood grain pattern or a stone pattern is printed.
[0012]
With this configuration, the dye printed on the film is covered on the surface of the aluminum product on which the oxide film is formed, and the dye on the film is impregnated in the electrolytic holes formed on the oxide film in a short time. Then, by performing a sealing treatment, a pattern and coloring are applied to the aluminum product, and it becomes possible to manufacture an aluminum product on which various patterns are applied while ensuring the robustness.
[0013]
According to the second aspect of the present invention, an oxide film forming process for forming an anodic oxide film on the surface of the metal, and silicon having a dye corresponding to a pattern attached to the electrolytic hole formed on the surface of the metal by the process By providing a pattern coloring method of an anodic oxide film that performs a process of pressing a rubber and impregnating the electrolytic hole with a dye adhering to the silicon rubber, and a process of sealing and clearing the electrolytic hole The object of the present invention can be achieved.
[0015]
Wherein the 請 Motomeko 3 is the invention of claim 1, or 2, wherein, for example, the metal is aluminum.
[0017]
Furthermore, the description of claim 4 is a configuration in which, in the invention of claim 1, 2, or 3, for example, a pigment is used instead of the dye.
By comprising in this way, the material which can be used increases and pattern coloring, such as a wood grain pattern and a stone-like tone, can be performed more easily and it is robust and does not fade.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
<First Embodiment>
In this example, first, anodization treatment is performed on aluminum to produce aluminum oxide (Al ₂ O ₃ ), and a dye is impregnated in the electrolytic hole to color various patterns. This will be specifically described below.
[0019]
First, an anodic oxide film is formed on aluminum. The anodic oxide film is formed by electrolysis in a sulfuric acid electrolyte using aluminum as an anode. At this time, the following chemical reaction occurs as an anodic reaction,
Al → Al ₃₊ +3 _e-
OH _- → O _{2- +} H +
HSO _4- → SO _42- + H ₊
The following reactions occur as the cathode reaction.
[0020]
H ₊ + e ₋ → H ₂
On the other hand, the formation of an oxide film containing sulfate radicals represented by the following chemical formula proceeds simultaneously inside the micropores of the anode. That is,
2Al ₃₊ ＋ 3O _2- → Al ₂ O ₃
Al ₃₊ + SO _42- → Al ₂ (SO ₄ ) ₃
The growth of the oxide film is sequentially laminated by forming electrolytic holes, and for example, an aluminum oxide film having a thickness of 10 to 15 μm is formed. In this state, a large number of electrolytic holes are formed in the aluminum oxide film.
[0021]
FIG. 1 is a sectional view of aluminum (aluminum oxide) for explaining this state. A barrier layer 2 is formed on the base aluminum 1, and the aluminum oxide layer (aluminum oxide film) 3 is formed on the barrier layer 2. In addition, a large number of electrolytic holes 4 are formed in the aluminum oxide layer 3 as described above, and the electrolytic holes 4 are sealed after being impregnated with a dye described later. In FIG. 1, the film thickness of aluminum oxide (Al ₂ O ₃ ) is, for example, 10 to 15 μm, and the diameter of the electrolytic hole 4 is several hundreds of millimeters.
[0022]
Next, the dye is impregnated into the aluminum electrolytic hole on which the oxide film is formed. FIG. 2 is a diagram for explaining this process. In the figure, the aluminum on which the oxide film is formed is processed and has, for example, a pan shape shown in FIG.
[0023]
First, in this example, a water tank 5 shown in FIG. A predetermined amount of water 6 is contained in the water tank 5, and a film 7 is floated on the water 6. The film 7 is positioned by, for example, a support member (not shown) so as to float at a predetermined position of the water tank 5. A predetermined pattern is printed on the film 7 with a dye. FIG. 3 shows an example of a wood grain pattern printed on the film 7.
[0024]
In this state, the aluminum processed product 8 shown in FIG. 1A is first moved above the film 7 on the water tank 5 shown in FIG. 1B, and the outer surface 8a of the aluminum processed product 8 faces downward. Press from above. When the processed aluminum product 8 is further pressed against the film 7, the water 6 in the water tank 5 is pushed around and the state shown in FIG.
[0025]
At this time, the film 7 is pressed against the outer peripheral surface 8a of the aluminum processed product 8 by water pressure, and the dye printed on the film 7 is impregnated into the holes from the electrolytic holes 4 formed on the surface of the aluminum processed product 8. FIG. 4 is a diagram showing this state.
[0026]
The wood grain pattern shown in FIG. 3 is printed on the film 7, and the dye printed on the film 7 is impregnated in the electrolytic hole 4, and a color pattern corresponding to the wood grain pattern is formed on the oxide film. The immersion time of the aluminum processed product 8 in the water tank 5 is, for example, about 1 second.
[0027]
Next, as shown in FIG. 4D, the film 7 is peeled off from the aluminum processed product 8, and for example, a sealing process using steam is performed. FIG. 5 is a view showing a cross-sectional configuration of the processed aluminum product 8 after the sealing treatment. In the figure, the electrolytic holes 4 formed in the oxide layer are impregnated with dyes 10a and 10b, and the upper part of the electrolytic holes 4 is sealed 9. Further, the dyes 10a and 10b impregnated in the electrolytic hole 4 are different colors and correspond to the above-described wood grain pattern.
[0028]
After that, the upper surface of the oxide layer 3 and the sealing treatment 9 shown in FIG. 5 is further coated using a thermosetting resin such as acrylic or polyester (FIG. 3E).
[0029]
By treating as described above, an aluminum product in which a dye is impregnated in the electrolytic hole 4 and a pattern using the dye is drawn on the anodized film can be manufactured. Therefore, the aluminum product manufactured by the treatment of this example does not peel off the color and is a robust product that can be used as a building material.
[0030]
Further, a color pattern using two or more colors can be colored on the aluminum product. Moreover, in the said Example, although the pattern printed on the film 7 was a wood grain pattern, patterns, such as a stone pattern and a checkered pattern, can also be drawn freely, for example.
[0031]
In the description of the above embodiment, the color former impregnated in the electrolytic hole 4 is a dye, but a pigment may be used.
Further, in the above description of the present example, the treatment for impregnating the dye into the electrolytic hole after the formation of the anodic oxide film has been described. However, for the aluminum material that has been colored by the primary electrolytic coloring method before the coloring treatment of the present example, This example may be processed.
[0032]
For example, the treatment of this example may be applied to an aluminum material developed from a substrate of a film using a special electrolytic solution, and silicon (Si), iron (Fe), copper (Cu), manganese (Mn) The treatment of this example may be performed on an aluminum material that is colored using an aluminum alloy to which an inorganic compound such as chromium (Cr) is added.
[0033]
By configuring in this way, for example, it is possible to perform a coloring process in which a part of the color of the wood grain pattern is made to correspond to the color of the aluminum base and the other color of the wood grain pattern is developed according to this example.
[0034]
<Second Embodiment>
Next, a second embodiment of the present invention will be described.
This example is a diagram for explaining a color treatment for an aluminum product after the above-described anodized layer is formed. In the first embodiment described above, the water tank 5 is used. In this example, a color developing process by pad printing will be described.
[0035]
FIG. 6 is a diagram for explaining the processing of this example. In this example, the dye is impregnated into the electrolytic hole 4 by a pad in which silicon rubber is disposed. This will be specifically described below.
[0036]
In the aluminum plate 10 shown in FIG. 2A, an anodic oxide layer is formed as described above, and a large number of electrolytic holes 11 are formed on the surface. First, the aluminum plate 10 is placed immediately below the press pad 12, the press pad 12 is lowered at a predetermined timing, and the silicon rubber formed on the pad surface 12 a of the press pad 12 is pressed against the surface of the aluminum plate 10.
[0037]
Here, for example, a dye corresponding to the wood grain pattern shown in FIG. 3 is attached to the silicon rubber. By pressing the silicon rubber against the aluminum plate 10, the dye is electrolytically formed on the surface of the aluminum plate 10. Infiltrate the hole 11. By this treatment, the grain pattern is colored on the oxide layer of the aluminum plate 10.
[0038]
Thereafter, as shown in FIG. 2C, the press pad 12 is raised upward, the aluminum plate 10 is taken out, and the electrolytic hole 11 impregnated with the dye is sealed as described above. Then, a coating is applied using a thermosetting resin such as acrylic or polyester.
[0039]
By performing the treatment as described above, an aluminum product in which a dye is impregnated in the electrolytic hole 11 and a wood grain pattern is formed on the anodized layer can be manufactured as described above. Therefore, in the case of this example as well, it is possible to obtain a robust aluminum product that does not peel off color compared to a product that is color-coated on the surface of aluminum and that can be used as a building material.
[0040]
In addition, a color pattern using two or more colors can be colored on an aluminum product, and various patterns such as a stone pattern and a checkered pattern can be freely colored as well as a wood grain pattern.
[0041]
In the description of the above embodiment, the color former impregnated in the electrolytic hole 11 is a dye. However, a pigment may be used.
In the description of the first and second embodiments, an example in which the present invention is applied to aluminum has been described. However, the present invention may be applied to not only aluminum but also magnesium and its alloys. Magnesium and its alloys are superior in lightness per unit density, high rigidity, and thermal conductivity as compared with aluminum, and can be made into a material with wider applications by coloring according to the present invention.
[0042]
【The invention's effect】
As described above in detail, according to the present invention, it is possible to impregnate a plurality of dyes in the electrolytic holes formed in the anodized film, and to color various color patterns on products such as aluminum, And a robust product.
[0043]
Further, by applying the above-described coloring treatment to a material such as aluminum that has been colored in advance with an inorganic compound or the like, a robust product such as aluminum can be manufactured with a less colored dye.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of aluminum after formation of an anodized film.
FIG. 2 is a diagram illustrating a pattern coloring method for an anodic oxide film according to the first embodiment.
FIG. 3 is a diagram illustrating an example of a wood grain pattern printed on a film.
FIG. 4 is a view showing a state in which a film on which a dye is printed is covered on an anodic oxide film.
FIG. 5 is a view showing a state where a dye is impregnated in an electrolytic hole and a sealing process is performed.
FIG. 6 is a diagram illustrating a pattern coloring method for an anodic oxide film according to a second embodiment.
[Explanation of symbols]
1 Aluminum 2 Barrier layer 3 Aluminum oxide layer (aluminum oxide film)
4 Electrolytic hole 5 Water tank 6 Water 7 Film 8 Aluminum processed product 8a Outer peripheral surface 10 Aluminum plate 11 Electrolytic hole 12 Press pad 12a Pad surface

Claims (4)

And processing you forming an anodic oxide film on the outer peripheral surface of the pot-shaped metal,
The electrolytic holes formed in the surface of the metal by the process, a pattern is printed with a dye, a processing for Ru is Kutsugaechaku the 浮設been film in a water bath,
A process of pressing the outer peripheral surface of the pan-shaped metal against the film from above, and impregnating the electrolytic film with the dye of the coated film by water pressure;
A treatment for removing the film after the treatment;
Sealing the electrolytic hole after removing the film and performing a clear coating;
The pattern coloring method of the anodized film characterized by performing. An oxide film forming process for forming an anodic oxide film on the surface of the metal;
A process of pressing the silicon rubber to which the dye corresponding to the pattern is attached to the electrolytic hole formed on the surface of the metal by the treatment, and impregnating the dye attached to the silicon rubber into the electrolytic hole;
A process of sealing the electrolytic hole and applying a clear coating;
The pattern coloring method of the anodized film characterized by performing. 3. The pattern coloring method for an anodized film according to claim 1, wherein the metal is aluminum.   4. The pattern coloring method for an anodized film according to claim 1, wherein a pigment is used instead of the dye.

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