JP3181855B2 - Method for manufacturing decorative steel sheet having three-dimensional coating and decorative steel sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative steel sheet for forming a three-dimensional pattern on the upper surface of a steel sheet, and a method of manufacturing the decorative steel sheet.

[0002]

2. Description of the Related Art Decorative panels obtained by applying a three-dimensional coating to a member to be coated such as a steel sheet are used in a wide variety of fields, such as as a material for interior and exterior of general houses and building structures, or as a material for manufacturing furniture decorations. ing. As described above, as a method of applying a three-dimensional coating to a member to be coated such as a steel plate, for example, a primary coating is applied to a steel plate, and a granular material made of a synthetic resin is sprayed before the primary coating is dried, and the granular material is temporarily mounted. A method of forming a three-dimensional pattern by heating and melting the temporarily mounted granular material has been proposed (Japanese Patent Application Laid-Open No. 56-126466).

A method of forming a three-dimensional pattern by adding a colored epoxy resin to a polycarbonate plate, not a steel plate, has also been proposed (for example, Japanese Patent Application Laid-Open No. 7-52598).

[0004]

However, in the method described in the above-mentioned Japanese Patent Application Laid-Open No. 56-126466,
Although a three-dimensional pattern can be formed on the member to be coated,
The height of the three-dimensional pattern could not be increased, and the formed pattern had a poor three-dimensional effect. In the method described in the above-mentioned Japanese Patent Application Laid-Open No. 7-52598,
Although the height of the three-dimensional pattern can be made relatively large, only a linear pattern can be formed, and a three-dimensional pattern over a wide range cannot be formed.

An object of the present invention is to provide a decorative steel sheet which is rich in a three-dimensional effect and forms a three-dimensional pattern over a wide range, and a method of manufacturing the decorative steel sheet.

[0006]

According to a first aspect of the present invention, there is provided a method for manufacturing a decorative steel sheet having a three-dimensional coating, comprising: placing a mold having a through-hole in a shape conforming to a three-dimensional pattern on an upper surface of the steel sheet; The putty is sprayed on the placed steel sheet a plurality of times, and then the sprayed putty is baked, and the process of sharpening the surface of the baked putty is repeated a plurality of times,
The present invention is characterized in that a putty is laminated on a portion of a through hole of a steel plate to form a three-dimensional pattern having a thickness substantially equal to that of a mold, thereby producing a decorative steel plate. The decorative steel sheet according to the invention of claim 2 is provided with a mold having a through hole having a shape conforming to a three-dimensional pattern on an upper surface of the steel sheet,
The mold is placed on the steel plate on which the putty is sprayed a plurality of times, and then the step of baking the sprayed putty and sharpening the surface of the baked putty is repeated a plurality of times. It is obtained by laminating and forming a three-dimensional pattern having a thickness substantially equal to that of the mold.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1A to 1G are views for explaining a three-dimensional coating method according to the present embodiment. In the present embodiment, the three-dimensional coating is applied to the steel plate 1. First, rust, grease, and the like of the steel sheet 1 are removed with alcohol, and the surface of the steel sheet 1 is roughened by sandblasting, buffing, corona discharge, sandpaper treatment, or the like to form fine irregularities. Then, dust and the like on the surface are removed again by air blow or the like.

(Lower processing step) Next, lower processing is performed. First, a preparation agent is applied, followed by baking. Thus, the primary layer 2 is formed as shown in FIG.

(Step of spraying three-dimensional coating primer) Next, FIG.
As shown in FIG. 4 (c) and FIG. 4, a mold 10 made of paper, metal or the like having a thickness of about 3 mm and having a through hole of a desired pattern is placed on the steel plate 1 and sprayed with a three-dimensional coating primer. Make the attachment. A putty having the following composition is used as the three-dimensional coating primer. <Weight ratio> Main agent: Curing agent: Thinner = 10: 1: 0.5 <Component table> Main agent Inorganic coloring pigment 4.0 Extender pigment 63.0 Specially modified unsaturated polyester resin 27.0 Catalyst 3.0 added Agent 3.0 100.0 (%) Curing agent Organic peroxide 13.0 Plasticizer 13.0 Ester solvent 74.0 100.0 (%) Thinner Petroleum hydrocarbon solvent 100.0 (%)

Here, the composition of a normal putty is shown below. <Weight ratio> Main agent: curing agent: thinner = 10: 1: 0.5 <Component table> Main agent Inorganic coloring pigment 2.0 Extender pigment 51.0 Specially modified unsaturated polyester resin 36.0 Catalyst 1.0 Addition Agent 2.0 Petroleum hydrocarbon solvent 8.0 100.0 (%) Curing agent Organic peroxide 60.0 Plasticizer 30.0 Colorant 4.0 Filler 6.0 100.0 (%) Thinner Petroleum hydrocarbon solvent 100.0 (%)

In the present embodiment, since the three-dimensional coating primer is composed of a component different from that of a normal putty, the spraying property when spraying the steel sheet 1 can be improved.

A low-pressure atomizing spray gun having the following performance is used as a gun for spraying the three-dimensional coating primer. Paint supply system Pressure feed type Paint nozzle diameter 0.6 mm Spray gun inlet air pressure 0.20 to 0.29 MPa (2 to 3 kgf / cm2) Air pressure in cap 0.04 to 0.07 MPa (0.4 to 0.7 kgf / cm2) Spraying distance 200mm Air consumption 330-450 liter / min Paint ejection 160ml / min Maximum effective pattern 190mm Required compressor 2.2KW or more Body mass 370g Fuel supply tank

FIG. 2 is a sectional view showing the structure of a nozzle device used in the spray gun. As shown in FIG.
The nozzle device has an air cap 12 around the nozzle port 11.
The auxiliary air hole 1 is formed around the nozzle port 11.
3, a plurality of air outlets 14 are formed on the inner peripheral surface of the air cap 12 from the nozzle port 11 to the jet port 15. Here, a cross-sectional view of a conventional nozzle device 15A is shown in FIG. In FIG. 3, an A is added to the reference number of the configuration corresponding to FIG. The nozzle device used in the present embodiment has a longer air cap 12 (for example,
m, 33 mm in this embodiment), and the air cap 12
The number of the air outlets 14 formed in the nozzles is large. In the present embodiment, by configuring the nozzle device in this manner, the pressure in the air cap 12 becomes relatively small, and the paint is atomized at a low pressure. Coating efficiency can be improved. Further, the fine graining function is excellent in spite of the low pressure, so that the finish of the decorative board can be made beautiful.
Furthermore, since the number of particles that bounce off the steel sheet 1 is reduced,
The paint consumption rate can be reduced, which can improve the working environment.

The three-dimensional coating undercoating step is performed according to the following procedure. First, spraying is performed four to five times in one spraying step. This is because, when a large amount of putty is sprayed at a time, the adhesion between the putty and the steel sheet 1 and the drying property deteriorate.
Then, after this spraying step, baking is performed at a surface temperature of 70 ° C. for 30 minutes, and thereafter, middle grinding is performed with steel wool. By repeating this step three to four times, a putty having a desired thickness is sprayed. Thereby, as shown in FIG. 1C, the three-dimensional coating undercoat layer 3 is formed.

(Spraying of three-dimensional coating top coat) Next, after removing the mold 10 from the steel plate 1 coated with the undercoat, the three-dimensional coating top coat is sprayed. Prior to the application of the three-dimensional coating top coat, the bumps on the surface of the steel sheet 1 are removed with steel wool or the like. Then, a baking treatment is performed after applying a three-dimensional coating top coat. Thereby, as shown in FIG. 1 (d), the three-dimensional coating top coat layer 4 is formed.

(Color Spraying Step) Next, a desired color spraying step is performed over the entire steel sheet 1. First, color spraying is performed, and then baking processing is performed. As a result, FIG.
As shown in FIG. 5, a color coating layer 5 is formed.

(Surface Treatment Step) Next, the surface of the steel sheet 1 is subjected to a surface treatment and is baked. (Medium sharpening process) Next, middle sharpening is performed with steel wool or the like so as not to lose the color of the three-dimensional portion. (Color spraying step) Next, the steel sheet 1 is sprayed with a color. In addition,
The second color spraying is performed only on the three-dimensionally coated portion by placing a mask having the same shape as the mold used in the three-dimensional coating undercoating agent spraying step on the steel plate 1. FIG. 1
As shown in (f), the color coating layer 6 is formed only on the portion where the three-dimensional coating is applied. At this time, a pattern may be provided on the surface of the steel plate 1 using a brush. (Baking process) After the color spraying process, a baking process is performed. (Surface Treatment Step) Next, the surface of the steel sheet 1 is subjected to a thin surface treatment. At this time, the surface of the steel sheet 1 is free from dust and lumps.

(Pearl Powder Spraying Step) After the surface treatment, the powder is naturally dried, and then a pearl powder spraying treatment is performed. (Baking process) After spraying pearl powder, baking treatment is performed. Thus, the pearl layer 7 is formed as shown in FIG. (Surface Treatment Step) Next, the surface of the steel sheet 1 is subjected to a thin surface treatment. This surface treatment is performed three times as follows. First, the baking is performed after spraying the surface treatment agent, and the baking is similarly performed after spraying the second time. Then, after spraying, baking is performed longer than the first and second times. In addition, every time the baking is performed, dust is removed with steel wool. At this time, large lumps are removed with sandpaper.

(Polishing Step) Finally, the bumps on the flat surface are removed by sanding or buffing to finish the process. At this time, it is necessary to avoid touching the three-dimensional part as much as possible. Also, when buffing,
The flat part may use a coarse compound, but the whole polishing requires the use of a fine compound.

As described above, in the present embodiment, since the surface of the steel plate 1 is three-dimensionally painted by spray coating with putty, the thickness of the three-dimensional portion is increased as compared with the conventional three-dimensional painting. Accordingly, a decorative plate having a sufficiently three-dimensional effect can be obtained. Further, since the putty is sprayed, a three-dimensional portion can be formed over a wide range, and thus various three-dimensional patterns can be formed.

In the above-described embodiment, the second color spraying is performed on the three-dimensional portion of the steel plate 1. At this time, instead of the color spraying, a foil is attached, a silk screen or the like is applied. The surface of the steel plate 1 may be provided with a handle. Alternatively, color spraying may be performed so that the three-dimensional portion has a partially different color.

[0022]

[0023]

As described above in detail, according to the present invention, a mold having a through hole having a shape conforming to a three-dimensional pattern is placed on the upper surface of a steel plate, and the putty is placed on the steel plate on which the mold is placed. A plurality of times, then baking the putty that has been sprayed, and sharpening the surface of the putty after baking is repeated several times to form a three-dimensional pattern with a thickness almost equivalent to that of the mold. The thickness of the three-dimensional pattern can be made larger than that of the three-dimensional coating, so that a decorative steel plate having a sufficient three-dimensional effect can be obtained. Further, a three-dimensional pattern can be formed over a wide range, and thus, various three-dimensional patterns can be formed.

[Brief description of the drawings]

FIG. 1 is a view for explaining an embodiment of a three-dimensional coating method according to the present embodiment.

FIG. 2 is a cross-sectional view illustrating a configuration of a nozzle device.

FIG. 3 is a sectional view showing the configuration of a conventional nozzle device.

FIG. 4 is a diagram showing a three-dimensional coating primer spraying process;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Steel plate 2 Primary layer 3 Three-dimensional coating undercoat layer 4 Three-dimensional coating top coating layer 5, 6-color coating layer 7 Pearl layer 10 type 11 Nozzle port 12 Air cap 13 Auxiliary air hole 14 Air outlet 15 Spout

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B05D 5/06 104 B05D 1/02-1/14 B05D 1 / 32,1 / 38 B05D 7/14 B05B 15/04 B32B 15/08

Claims (2)

(57) [Claims] 1. A steel sheet having a shape conforming to a three-dimensional pattern on an upper surface of a steel sheet.
Place a mold with through holes, Spraying putty on the steel plate on which the mold is placed a plurality of times,
After that, the baked putty is baked and baked
Grinding the surface of the putty after attaching
Repeat several times, Laminating the putty on the portion of the through hole of the steel plate,
Forming the three-dimensional pattern with a thickness almost equal to the mold
Steel plate with three-dimensional coating characterized by manufacturing
Manufacturing method. 2. A through-hole having a shape conforming to a three-dimensional pattern on an upper surface of a steel plate.
Place a mold with through holes, Spraying putty on the steel plate on which the mold is placed a plurality of times,
After that, the baked putty is baked and baked
Grinding the surface of the putty after attaching
Repeat several times, Laminating the putty on the portion of the through hole of the steel plate,
It is noted that the three-dimensional pattern with a thickness almost equal to that of the mold was formed.
Decorative steel plate.