JP5357919B2 - How to paint a painted metal body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To coat a fluorescent paint, light reflection paint, light accumulation paint and the like onto a metal base as an adhesion film rich in useful strength for a long period of time, thereby contriving so as not to peel at all. <P>SOLUTION: A porous black formation film (10) is formed onto a surface of stainless steel, iron, aluminum, and the other metal bases (M) serving as a coating underlaying layer by black chromium plating treatment, lay dent treatment, and the other electrolysis, and thereafter there are successively coated a white base coat film (11) onto a surface of the porous black formation film (10), a center coat film (12) composed of the fluorescent paint, the light accumulation paint, the light reflection paint, and the other luminescent paints which can emit a light by receiving a light onto a surface of the base coat film (11), and a transparent top coat film (13) onto a surface of the center coat film (12). <P>COPYRIGHT: (C)2013,JPO&amp;INPIT

Description

The present invention relates to a method of coating a painted metal body, such as road guard rails and traffic signs, street light poles, building interior and exterior materials, wristwatch exterior materials, manual work tools, bicycle frame (body) and wheel spokes. By coating fluorescent parts, light-reflecting paints, phosphorescent paints , and paints that emit light when exposed to light on various parts such as rims and other metal bodies, they will never be peeled off. It is devised as such.

  An outer layer made of a fluorescent paint is coated with a fluorescent coating metal body described in JP-A-11-48399 (Patent Document 1) via a resin coating (2) powder-coated on the surface of the metal body (1). 3), and is considered to be a known technique that is most similar to the present invention in that the fluorescence can be sustained for a long period of time.

JP 11-48399 A JP-A-5-76835 JP-A-8-229502 JP 2004-122409 A JP 2004-160757 A

  In general, it is difficult to firmly adhere a coating (coating film) made of a coating material to the surface of iron, non-ferrous metal, alloy steel, or other metal substrate for many years. In the configuration of the fluorescent coated metal body disclosed in Patent Document 1, even if the base layer of the outer layer (painted film) made of fluorescent paint is a resin coating that can be thickened by a single coating, the resin Since the coating film is powder-coated (electrostatic coating) on the surface of the metal body, the adhesion of the coating film is inferior, and it may be peeled off early and the metal body may rust.

  In particular, when the metal substrate is stainless steel, a strong oxide film of crystals that are too dense is formed on the surface thereof, so the above problem becomes significant, and a semi-permanent decorative effect, corrosion resistance, etc. are ensured. I can't.

  In this regard, the formation of a chemical conversion film by chromate treatment as a base layer (first layer) for coating on the surface of a stainless steel substrate is disclosed in Patent Documents 2 to 5, but this chromate treatment is Even if the chemical conversion coating is black, unlike the porous black chemical conversion coating deposited by electrolysis, the adhesive strength of the coating is still weak, and cracks are likely to be generated from the bent portion. It is not useful as a paint base layer to maintain the properties semipermanently.

The present invention is for the purpose of improving such a problem, in order to achieve the purpose, to a portion of the surface at the gold Shokumotozai in claim 1, the first masking tape there is insulation for electrolysis After being pasted, a porous black chemical conversion film having a thickness of 1 μm to 2 μm composed of a collection of chromium fine particles deposited by a radiant treatment is formed as an undercoat layer on the exposed portion remaining on the surface of the metal substrate,

Thereafter, the first masking tape is replaced with a second masking tape that is not thermally deformed for coating, and then a white undercoat is applied to the surface of the black chemical conversion coating, and a fluorescent paint, phosphorescent paint, or light is applied to the surface of the undercoat. Apply an intermediate coating film made of reflective paint and a transparent topcoat film on the surface of the intermediate coating film.

Finally, the second masking tape is peeled off to exhibit a glossy material feeling from the metal base material and the light emitting property of the intermediate coating film.

Further, the surface of the gold Shokumotozai in claim 2, characters, figures, symbols or the heat resistance is not thermally deformed vent holes serving as the outline of a mark consisting of bond coating and processed insulating A thickness of 1 μm or more consisting of an accumulation of a group of chromium fine particles deposited by a radiant treatment as a coating underlayer on a surface exposed portion of a metal substrate through a hole in the masking sheet after a masking sheet of a plastic film is pasted Forming a 2 μm porous black conversion coating,

Thereafter, a white undercoat on the entire surface of the black chemical conversion coating and the masking sheet, an intermediate coat made of a fluorescent paint, a phosphorescent paint or a light reflecting paint on the surface of the undercoat, and a surface of the intermediate coat Apply the transparent top coat in order,

Finally, the masking sheet is peeled off to exhibit the material feeling rich in its own gloss from the metal substrate and the light emission of the mark in the intermediate coating film.

According to the arrangement of claim 1, the intermediate coating fluorescent paint, since made of phosphorescent ink or light-reflecting coating, a luminescent at night or in dark places (visibility) to the coated metal body, which Safety based on can be given.

In addition, since the surface of the intermediate coating film is masked with a transparent top coating film, there is no risk of scratching during use of the coated metal body, and the abrasion resistance and wear resistance are excellent.

In particular, a porous black chemical conversion film having a thickness of 1 μm to 2 μm composed of an accumulation of a group of chromium fine particles deposited by a radiant treatment is formed on the surface of the metal substrate as a coating underlayer. Since the white undercoat that temporarily hides black is coated, there is no risk of peeling of the undercoat, intermediate and overcoat, and strong adhesion and corrosion resistance (rust resistance) over many years As a result, there is an effect that the light-emitting property that is easily visible can be maintained for a long time.

In particular, according to the configuration of claim 1, the porous black chemical conversion film formed by the radient treatment is easily applied to a part of the surface of the metal substrate by applying the first masking tape having electrical insulation therefor. It can be formed without hindrance, and then the first masking tape is replaced with the second masking tape for coating, so that the surface of the porous black chemical conversion coating is coated with a white undercoat, fluorescent paint, phosphorescent paint, or light reflection An intermediate coating film made of a paint and a transparent top coating film that masks the intermediate coating film can be sequentially applied, and the workability is excellent.

In that case, to the surface exposed portion where the first and second masking tapes of the metal base material are not attached, the formation of the porous black chemical conversion coating as the coating underlayer, and subsequent coating of the undercoat and intermediate coating, The surface coating portion (non-exposed portion) to which the first and second masking tapes are attached is the final second masking tape while the intermediate coating film is given light emission (visibility) by the paint. By stripping off, the material feeling rich in luster of the metal base material itself can be displayed, so that an elegant cosmetic effect of the combination can be obtained, and it can be said that it is particularly effective for a metal base material made of stainless steel.

On the other hand, according to the configuration of claim 2, a masking sheet that can withstand both electrolysis (electrochemical reaction) and painting and has a desired mark (image) cut out is used. Therefore, a radiant treatment on the metal substrate after the application, formation of a porous black chemical conversion film by the radiant treatment, and an undercoat film and an intermediate coat film on the entire surface of the black chemical conversion film and the masking sheet In addition, the coating of the top coat can be carried out very efficiently, and the final stripping of the masking sheet results in the glossy material feeling of the metal substrate itself and the coating of the intermediate coat made of the paint. There is an effect of obtaining luminous properties (visibility).

In any of the coating methods described in claims 1 and 2, the radiant-treated film has an electrolysis action (electrochemical reaction) at a minus temperature (low temperature) different from that of a normal chemical reaction. Since it is a 1 to 2 μm porous black chemical conversion coating consisting of countless amorphous (non-crystalline) chromium fine particles deposited on the surface, a coating material (paint) is entangled in the network of capillaries in countless fine pores. Forms a coating base layer with excellent secondary adhesion of the undercoat, intermediate coat, and topcoat so that it can penetrate, and even if the metal substrate is bent, there is no risk of cracking from the bent portion. .

In addition, a part of the above-mentioned radiant treatment film diffuses into the base metal substrate to form a diffusion layer (alloy layer), so it exhibits excellent adhesion and rust prevention (corrosion resistance). As a result, the light emission from the intermediate coating film can be maintained for many years.

It is a slope view which shows the guardrail of a road as a coating metal body of this invention. It is a top view which shows a manual work tool (monkey wrench) as a coating metal body of this invention. It is a front view which shows a parking lot display board as a coating metal body of this invention. It is a front view which shows the turning ring of a wristwatch as the coating metal body of this invention. It is a slope view which shows a flag pin of golf as a painted metal object of the present invention. 1 is a perspective view showing a shaft of a golf club as a painted metal body of the present invention. It is sectional drawing which shows 1st Embodiment of the coating method which concerns on this invention. It is sectional drawing which shows 2nd Embodiment of the coating method which concerns on this invention. It is a front view which shows the coating metal body (traffic sign board) completed by the coating method of FIG.

1 to 6 illustrate road guard rails and manual work tools, parking lot display boards, watch turning rings, golf flag pins, and golf club shafts as painted metal bodies of the present invention. The stainless steel plate (SUS304) is a cross-sectional view showing the coating process as a representative example of the metal substrate (M), but the surface of the metal substrate (M) is not limited to the flat surface shown in the figure, but is also curved or uneven. There can be a surface.

Then, it is as follows when 1st Embodiment of the coating method which concerns on this invention is described in full detail based on FIG. 7 (I)-(VI). That is, in order to remove oils and fats, dirt, impurities, etc. adhering to the surface of the metal substrate (M), washing or degreasing treatment with thinner, alcohol, or various acids is performed in advance.

First, as shown in FIG. 7 (I) as a first step, the electrolysis action (electricity) of the radiant treatment is applied to the non-light-emitting portion (a) on the surface where the metallic base material (M) is desired to have a glossy texture. A first masking tape (T1) such as a vinyl tape having electrical insulation and non-chemical reactivity that can withstand a chemical reaction) is applied to the covering state.

Next, as is apparent from FIG. 7 (II), the portion where the surface of the metal substrate (M) is exposed (the light emitting portion described later) (b) is subjected to a radiant treatment, and the porous material is obtained by electrolysis. The black chemical conversion coating (10) is formed .

In addition, the radiant treatment means a special metal surface treatment developed by the applicant of the present invention. A catalyst component is appropriately added to a chromic acid aqueous solution, and the temperature is about minus 5 ° C to about minus 10 ° C. Is performed by direct current electrolysis (for example, about 6 V to about 12 V for about 5 minutes to about 60 minutes) to deposit a porous black coating of chromium fine particles on the metal surface to a thickness of 1 μm to 2 μm.

Such a porous thin black chemical conversion coating by the radiant treatment diffuses partly into the inside of the metal base material (M) which is a base material, and forms a 1 μm diffusion layer (alloy layer). Therefore, it exhibits excellent adhesion and rust preventive power, has no risk of peeling or rusting over many years, and has excellent durability.

In addition, since the above-mentioned submicron-class amorphous chrome fine particles are accumulated, and the porous coating film having numerous pinholes and microcracks, the contact surface area with a coating material (paint) described later is extremely large. An undercoat layer having excellent secondary adhesion of the coating film can be formed as if the coating material (paint) spreads and penetrates into every corner of the capillary vessel.

  The code | symbol (10) of FIG. 7 has shown the porous black chemical conversion film formed in the surface of the metal base material (M) by such a radiant process, and this becomes a below-mentioned coating base layer.

  Once the porous black chemical conversion coating (10) has been formed by the radiant treatment, the first masking tape (T1) is then peeled off from the surface of the metal substrate (M) as shown in FIG. 7 (III). Then, a paper tape or other second masking tape (T2) which is not thermally deformed is applied to the non-light emitting portion (a) on the surface of the metal base (M).

By applying the second masking tape (T2), the porous black chemical conversion film (10) is coated with the non-light emitting portion (a) on the surface of the metal substrate (M). A white undercoat film (11) is formed on the surface using an appropriate method such as brush coating, spray coating, dip coating, or roll coating as shown in FIG. 7 (III).

  Wood sealer (JIS K 5533), a one-component reaction-curing water-based urethane resin paint added with white pigment (Daibu Paint's trade name “DNT View Urethane”) The film thickness after solidification is preferably set to about 15 μm to about 25 μm, more preferably about 20 μm.

Furthermore, since the undercoat film (11) is set to white, the black color of the porous chemical conversion film (10) obtained by the previous radient treatment is temporarily concealed by the white undercoat film (11), and the intermediate coat described later. This is to prevent the color of the coating from becoming dark.

  In that sense, if the thickness of the undercoat film (11) is less than 15 μm, the black chemical conversion film (10) of the coating underlayer does not appear to be gray, and on the other hand, it is thicker than 25 μm. When considering the subsequent intermediate coating and top coating, the undercoating (11) is too thick and unnecessary and uneconomical. For this reason, it is most preferable to form the film thickness of about 20 μm.

Once the undercoat (11) is solidified by drying at the required temperature and time, as is apparent from FIG. 7 (IV), the surface of the undercoat (11) is again brushed, sprayed, or dipped. By applying a light-emitting paint using an appropriate method such as painting or roll coating, an intermediate coating film (12) capable of emitting light upon irradiation with light is formed. The film thickness after solidification in the intermediate coating film (12) is preferably set to about 30 μm.

The茲, fluorescent coating as the light-emitting coating an aqueous or solvent-phosphorescent ink, or transparent paint and reflective spheres can be employed a light reflecting paint that combines (glass beads), these fluorescent materials and phosphorescent Colorants (pigments and dyes) that become color materials other than the material may be included.

Then, if the intermediate coating film (12) made of such a paint is solidified by drying at a required temperature and a required time, the surface of the intermediate coating film (12) is evident from FIG. 7 (V). A clear lacquer for overcoating (JIS K5531) is applied by an appropriate method such as brushing, spraying, dip coating, or roll coating to form a transparent topcoat film (13). The film thickness after solidification in the overcoat film (13) may be about 5 μm to about 10 μm.

When the overcoat film (13) is dried and solidified, the second masking tape (T2) for coating is finally peeled off. Then, a painted metal body as shown in the sectional view of FIG. 7 (VI) is completed, and the intermediate coating film (12) occupying the light emitting portion (b) on the surface of the metal base (M) At the same time as emitting light, the remaining non-light emitting part (a) has a metallic color (background) gloss, and the metallic base material (M) itself has a rich luster and luminous properties. become.

8 (I) to (VI) are cross-sectional views showing a painting process according to the second embodiment of the present invention, and FIG. 9 illustrates a completed traffic sign board as the painted metal body.

In the coating process of the first embodiment described with reference to FIGS. 7 (I) to (VI), the first masking tape (T1) having an insulating property for electrolysis and the second masking without thermal deformation for coating. Two types of tape (T2) are prepared, and the two types are replaced.

In addition, the first and second masking tapes (T1) and (T2) are attached to the non-light-emitting portion (a) on the surface where it is desired to leave a glossy texture (background) in the metal substrate (M), Formation of the porous black chemical conversion coating (10) serving as a coating base layer on a surface exposed portion (light emitting portion) (b) to which these are not attached, a white undercoat coating (11), and a light emitting intermediate coating (12) ) And the transparent intermediate coating (12) are sequentially applied.

In contrast, in the coating process of the second embodiment shown in FIGS. 8 (I) to (VI), it can be replaced by being able to withstand the electrolysis action (electrochemical reaction) of the radiant treatment and the coating. An unnecessary kind of masking sheet (heat-resistant plastic film) (S) is punched with a punching hole (14) to be a light emitting part (b) of the metal substrate (M), and the punching hole ( 14) defines the outline shape of an arbitrary mark (image) (15) made up of characters, figures, symbols, or combinations thereof as illustrated in FIG.

Then, first, as shown in FIG. 8 (I), the masking sheet (S) is attached to the surface of the metal substrate (M), and then as apparent from FIG. 8 (II), the masking sheet (S) A porous black chemical conversion film (10) is formed by the above-mentioned radiant treatment on the surface exposed portion (light emitting portion) (b) of the metal substrate (M) through the punched hole (14), and this is prepared as a coating underlayer. To do.

Then, as shown in FIG. 8 (III), to the entire surface of the masking sheet (S) in a state of covering the surface of the metal substrate (M) and the porous black chemical conversion coating (10) by the radiant treatment, A white undercoat film (11) to be a desired mark (image) (15) is formed from the front side by spray coating, brush coating, roll coating, flow coater coating, or other appropriate coating methods.

If the undercoat (11) is dried and solidified, then, as is apparent from FIG. 8 (IV), the surface of the undercoat (11) is brushed, sprayed or other suitable coating method. Used to form an intermediate coating (12) made of fluorescent paint, phosphorescent paint, or light reflective paint.

Further, when such an intermediate coating film (12) is dried and solidified, an appropriate method such as spray coating or roll coating is applied to the surface of the intermediate coating film (12) as shown in FIG. Thus, a clear lacquer for overcoating (JIS K5531) is applied to form a transparent overcoating film (13).

And if the top coat (13) dries and solidifies, the masking sheet (S) stuck on the surface of the said metal base material (M) will be peeled finally. Then, as is apparent from FIGS. 8 (VI) and 9, the undercoat film (11), intermediate coat film (12) and topcoat film (13) mounted on the surface of the masking sheet (S). As a result, the above three porous black chemical conversion coatings (10) are used as the coating underlayer, and the undercoat (11) and the intermediate coating coated on the surface thereof are used. (12) and only the top coat (13) remained on the surface of the metal substrate (M) and were bordered to correspond to the punched holes (14) in the original masking sheet (S). The desired mark (image) (15) is exposed from the metal substrate (M).

The desired mark (image) (15) is based on the performance of the intermediate coating film (12) made of the above-mentioned paint, compared with the case where light is emitted from the light-emitting portion (b) on the surface of the metal substrate (M). Since the surface of the metal substrate (M) covered with the non-punched portion of the masking sheet (S) is exposed as a non-light emitting portion (a) by peeling off the masking sheet (S), this non-light emitting portion ( From a), the metallic base material (M) itself has a glossy material feeling.

In addition, since the other structure in 2nd Embodiment of FIG.8, 9 is substantially the same as the said 1st Embodiment of FIGS. 1-7, the code | symbol corresponding to FIG. The detailed explanation is omitted.

(10) ・ Porous black chemical conversion coating (11) ・ Undercoating coating (12) ・ Intermediate coating (13) ・ Overcoating coating (14) ・ Punching hole (15) ・ Mark (image)
(M) ・ Metal base material (S) ・ Masking sheet (T1) ・ First masking tape (T2) ・ Second masking tape (a) ・ Non-light emitting part (b) ・ Light emitting part

Claims (2)

A portion of the surface of the gold Shokumotozai (M) to (a), after having pasted first masking tape there is insulation for electrolysis (T1), the exposed portion remaining on the surface of the metal substrate (M) (B) As a coating underlayer, a porous black chemical conversion film (10) having a thickness of 1 μm to 2 μm composed of an accumulation of a group of chromium fine particles deposited by the radiant treatment is formed,
Thereafter, the first masking tape (T1) is replaced with a second masking tape (T2) that is not thermally deformed for coating, and a white undercoat film (11) is applied to the surface of the black chemical conversion film (10). An intermediate coating (12) made of a fluorescent paint, a phosphorescent paint or a light reflecting paint is applied to the surface of the undercoat (11), and a transparent topcoat (13) is successively applied to the surface of the intermediate coat (12). ,
Finally, by peeling off the second masking tape (T2), the metallic base material (M) exhibits its own glossy material feeling and the light emitting property of the intermediate coating (12). How to paint a metal body. To the surface of the gold Shokumotozai (M), characters, figures, symbols or heat resistance contours become vent hole (14) is not thermally deformed by coating the processed insulating mark (15) made of these binding As a coating base layer on the surface exposed portion (b) of the metal substrate (M) through the punched hole (14) of the masking sheet (S) Forming a porous black chemical conversion coating (10) having a thickness of 1 μm to 2 μm comprising a collection of chromium fine particles deposited by the radiant treatment;
Thereafter, a white undercoat film (11) is formed on the entire surface of the black chemical conversion film (10) and the masking sheet (S), and a fluorescent paint, a phosphorescent paint, or a light reflecting paint is formed on the surface of the undercoat film (11). The intermediate coating film (12) and a transparent top coating film (13) are sequentially applied to the surface of the intermediate coating film (12),
Finally, by stripping off the masking sheet (S), the metal substrate (M) exhibits its own glossy material feeling and the luminescent property of the mark (15) in the intermediate coating (12). A method of painting a painted metal body, characterized by

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