JP2003311206A - Method of coating surface of building material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of coating the surface of a building material in which a powder-containing coating material is applied only on a projected part of the surface of the building material by a roll coater, the powder is uniformly transferred on the projected part and appearances having natural feeling are attained by the simple method. <P>SOLUTION: The coating material 4 mixed with the powder 3 is applied only on the projected part 1 surface of the surface of the building material 2 having the projected part 1 on the surface. The coating roll 5 having many small grooves 6 into which the powder 3 enters on the outer circumferential surface is used. The coating material 4 containing powder 3 supplied between the coating roll 5 on which the small grooves 6 are formed and a doctor roll 7 is applied on the projected part 1 surface of the surface of the building material 2 by the coating roll 5. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of coating a surface of a building material having a projection on its surface, in which granules are mixed only on the surface of the building material.

[0002]

2. Description of the Related Art Conventionally, a paint mixed with granules such as beads or sand has been applied only to the protrusions on the surface of building materials such as ceramic exterior building materials, metal building materials, and interior building materials having embossed surfaces. In order to make a building material that has a natural appearance, parts that you do not want to paint are masked in advance and then spray painting is performed. In this conventional example, paint loss (about 50% loss occurs) In addition, there is a problem that the solvent-based paint deteriorates the working environment, the treatment cost of the recovered non-paint becomes high, and the production efficiency is very poor because of the masking painting.

In coating with a coating roll, the coating roll is applied in advance only to the projections on the surface of the building material, and then particles such as beads or sand are sprinkled on the coating, which is then spread. After drying, the same portion was again coated on the protrusion with a coating roll to fix particles such as beads and sand. However, in this conventional example, it is necessary to perform coating twice with a coating roll and also a step of sprinkling the particles, the manufacturing process becomes complicated, the manufacturing equipment becomes large-scaled, and the cost is also very high. There was a problem of becoming. Moreover, in this conventional example, it cannot be said that all the particles are equally covered with the paint, and there is a possibility that the particles not sufficiently covered with the coating film of the paint may fall off to cause poor quality. .

Therefore, the present inventor, in the process of reaching the present invention,
Although it was considered that the particles 4 such as beads or sand were mixed in the paint 4 in advance and the paint 4 mixed with the particles 3 was applied only to the protrusions 1 on the surface of the building material 2 by the application roll 5. When it is attempted to apply the coating material 4 containing the granules 3 only to the projecting portion 1 on the surface of the building material 2 by the coating roll 5 of No. 3, as shown in the schematic diagram of FIG. Therefore, there is a problem in that the particles 4 flow out in the lower part of the protrusion 1 together with the paint 4 as shown by the arrow A, and the granules 3 cannot be evenly transferred only to the protrusion 1 and the commercial value is reduced. There was found.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned points, and the coating material containing particles is applied only to the projections on the surface of the building material by a coating roll and the particles are projected. It is an object of the present invention to provide a surface coating method for a building material, which can be evenly transferred to the surface of the building material and which can give a natural appearance by a simple method.

[0006]

In order to solve the above-mentioned problems, a method for coating a surface of a building material according to the present invention is provided with a projection 1 on the surface.
In applying the coating material 4 in which the particles 3 are mixed only on the surface of the projecting portion 1 of the building material 2 having, the coating roll 5 having a large number of small grooves 6 in which the particles 3 enter is formed on the outer peripheral surface. The coating material 5 containing the granules 3 supplied between the coating roll 5 having the small grooves 6 and the doctor roll 7 is applied to the surface of the projection 1 on the surface of the building material 2 by the coating roll 5. is there. By adopting such a method, when the coating material 4 containing the granules 3 is attached to the coating roll 5 and the coating material 4 containing the granules 3 is coated on the surface of the projection 1 on the surface of the building material 2, The granular material 3 is placed in a large number of small grooves 6 on the outer peripheral surface, and the coating roll 5 is pressed against the surface of the projecting portion 1 of the building material 2 in a state where the granular material 3 is contained in the small grooves 6 and the coating material 4 is applied and transferred. Therefore, the granules 3 do not escape together with the paint 4 due to the pressing pressure of the coating roll 5, and the paint 4 containing the granules 3 can be effectively applied only to the surface of the protrusion 1.
The granules 3 are transferred onto the surface of the protrusion 1 almost evenly, and the granules 3 have a natural appearance.

The diameter of the inscribed circle of the small groove 6 is 400 to 2
It is preferable that the groove depth of the small groove 6 is 000 μm and is 100 to 1000 μm. By adopting such a method, the particles 3 having a particle size of 10 to 500 μ are put in the small groove 6 so that the particles 3 do not escape from the surface of the protrusion 1 by the pressing pressure of the coating roll 5 at the time of transfer. The paint 4 containing the granules 3 can be applied, and too many granules 3 can be placed in the small grooves 6.
However, if the content is in the range, the natural feeling after transfer is impaired, but by setting the content in the above range, it is possible to keep the natural appearance.

The distance between the coating roll 5 and the doctor roll 7 is preferably 0 ± 0.3 mm. By adopting such a method, the amount of the coating material 4 which allows the coating material 4 containing the granules 3 supplied between the coating roll 5 and the doctor roll 7 to be properly adhered to the surface of the projecting portion 1 of the building material 2 4 is attached to the outer peripheral surface of the coating roll 5, and the coating material 4 containing the granules 3 can be appropriately applied and transferred onto the surface of the projecting portion 1 of the building material 2.

The rotation speed of the doctor roll 7 is preferably 0.5 to 0.9 times the rotation speed of the coating roll 5. By adopting such a method, the particles 3 can sufficiently pass through the gap between the coating roll 5 and the doctor roll 7, and the desired natural feeling can be expressed.

Further, it is preferable to mix 10 to 40 parts by weight of the particles 3 having a particle size of 10 to 500 .mu. By adopting such a method, the desired natural feeling can be exhibited by the paint 4 containing the granules 3.

Further, the viscosity of the paint 4 is set to 70 to 130 seconds (Iwata cup No. 2) and the liquid temperature of the paint is set to 5 to 35 ° C.
It is preferable that By adopting such a method, it is possible to apply an appropriate amount of the coating material 4 only to the surface of the protrusion 1.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on the embodiments shown in the accompanying drawings.

FIG. 1 is a schematic diagram of a roll coater apparatus used in the method for coating the surface of a building material according to the present invention.

In the figure, reference numeral 5 denotes a coating roll, which is made of extremely soft rubber (rubber hardness is 20 degrees or less), and a large number of small grooves 6 are formed on the outer peripheral surface by etching.

Reference numeral 7 in the drawing denotes a doctor roll, and 8
Is a backup roll. Then, the coating material 4 in which the granules 3 are mixed is supplied between the coating roll 5 and the doctor roll 7, and the coating material 4 containing the granules 3 is transferred to the coating roll 5, and further, the coating roll 5 is used. The coating 4 containing the granules 3 is applied and transferred onto the surface of the building material 2 that is transferred between the backup roller 5 and the backup roll 8.

The building material 2 has an uneven surface, and is a ceramic exterior building material, a metal building material, an interior building material, etc. In the present invention, the projection 1 on the surface of the uneven building material 2 is used. The paint 4 containing the granules 3 is applied only to and is transferred.

The particles 3 mixed in the paint 4 are beads, sand, etc., and have a particle size of 10 to 500 μm. The paint 4 may be either a solvent-based paint or a water-soluble paint, but the particle size is 10 to 50 so that the particles 4 such as beads and sand can have a natural feeling.
10 to 40 parts by weight of 0 μ of the granular material 3 is mixed in the coating material 4. The viscosity of the coating material 4 is 70 to 130 seconds (Iwata cup No. 2), and the liquid temperature of the coating material 4 is 5 to 35 ° C.
And

A large number of small grooves 6 formed by etching on the outer peripheral surface of the coating roll 5 are formed by the granules 3 mixed in the paint 4.
, The diameter of the inscribed circle of the small groove 6 is 400 to 2000 μm, and the groove depth of the small groove 6 is 1
It is from 00 to 1000 μ. The small groove 6 is etched so as to have a design so that the pattern can be transferred to the surface of the building material 2.

The distance between the coating roll 5 and the doctor roll 7 is set to 0 ± 0.3 mm, the rotation speed of the coating roll 5 and the rotation speed of the backup roll 8 are the same, and the rotation speed of the doctor roll 7 is coated. The rotation speed of the roll 5 is 0.5 to 0.9 times.

Then, while passing the building material 2 between the coating roll 5 and the backup roll 8 with the uneven portion of the surface facing upward, the coating roll 5 is applied to the surface of the projecting portion 1 of the building material 2. The paint 4 containing the particles 3 is applied and transferred.

In this case, the coating material 4 containing the granules 3 supplied between the coating roll 5 and the doctor roll 7 is the coating roll 5
And is rotated while being attached to the outer peripheral surface of the coating roll 5. At this time, the granules 3 mixed in the coating material 4 enter a plurality of the granules 3 into a large number of small grooves 6 on the outer peripheral surface of the coating roll 5, and are pressed against the surface of the projecting portion 1 on the surface of the building material 2 in this state. Is transcribed. Since the coating roll 5 is applied and transferred by pressing the coating roll 5 against the surface of the projecting portion 1 of the building material 2 with the granules 3 contained in the small grooves 6, as shown in FIG. 2, the pressing pressure of the coating roll 5 is reduced. By this, the paint 3 containing the granules 3 can be effectively applied and transferred only to the surface of the projection 1 without the granules 3 escaping together with the paint 4, and the granules 3 are transferred to the surface of the projection 1 almost uniformly. The body 3 can give a natural appearance.

Here, as described above, the diameter of the inscribed circle of the small groove 6 is 400 to 2000 μm and the groove depth of the small groove 6 is 100 to 2000 μm.
Since it is 1000μ, the particle size in the small groove 6 is 10 to 50
Particles 3 having a particle size of 10 to 500 μ, which have entered the small grooves 6 in the protrusions 1 on the surface of the building material 2 along with the paint 4, are transferred to the surface of the protrusions 1 as they are What appears to be a mass of large particles that have hardened with the paint will be formed evenly on the surface of the protrusion 1, and it is possible to create a design expression in which large particles are sprinkled on the surface of the protrusion 1. is there.

Further, as described above, by setting the distance between the coating roll 5 and the doctor roll 7 to 0 ± 0.3 mm, the coating material containing the granules 3 supplied between the coating roll 5 and the doctor roll 7 is obtained. 4 is adhered to the outer peripheral surface of the coating roll 5 in an amount such that the paint 4 can be properly adhered to the surface of the projecting portion 1 of the building material 2, and the paint 4 containing the granules 3 is properly applied to the surface of the projecting portion 1 of the building material 2. It can be applied and transferred. If the distance between the coating roll 5 and the doctor roll 7 is out of the above range, the paint 4 containing the granules 3 may flow down from the gap between the coating roll 5 and the doctor roll 7 without adhering to the outer peripheral surface of the coating roll 5. However, the coating material 4 containing the granules 3 does not adhere to the outer peripheral surface of the coating roll 5 in an appropriate amount, which is not preferable.

Further, the reason why the rotation speed of the doctor roll 7 is set to 0.5 to 0.9 times the rotation speed of the coating roll 5 is that the rotation of the doctor roll 7 and the coating roll 5 is as described above. By providing a difference in speed, paint 3 containing granules 4
Can be effectively adhered to the outer peripheral surface of the coating roll 5 by passing between the coating roll 5 and the doctor roll 7, and the granules 3 are effectively drawn in and attached to the coating roll 5 side. Then, the coating material 5 containing the granules 3 is applied to the surface of the projecting portion 1 of the building material 2 by the application roll 5, and the natural feeling can be effectively expressed by the granules 3.

In the present invention, 10 to 40 parts by weight of the particles 3 having a particle size of 10 to 500 μ are mixed in the paint 4.
If the amount of the mixed particles 3 is too small, the desired natural feeling cannot be expressed, and if the amount of the mixed particles 3 is too large, it is necessary to handle the paint 4 during the coating work such as liquid feeding and dilution of the paint 4. It is not preferable because it causes trouble.

Further, in the present invention, the viscosity of the paint 4 is set to 7
0 to 130 seconds (Iwata Cup No. 2) and paint 4
The liquid temperature of 5 to 35 ° C. Here, the liquid temperature of the paint 4 is 5
The reason for setting the temperature to ˜35 ° C. is that if the temperature of the coating material 4 is less than 5 ° C., the temperature of the coating material 4 is too low, the viscosity becomes high, and the coating amount increases,
Subsequent baking becomes difficult, and the paint 4 temperature is 3
If it exceeds 5 ° C., the temperature of the coating material 4 becomes too high and the viscosity becomes low, and the coating material 4 drips from the projecting portion 1 of the building material 2 to a lower portion and flows out, which is unfavorable.

A number of small grooves may be formed on the outer peripheral surface of the doctor roll 7, and in this case, the granules 3 are further interposed between the coating roll 5 and the doctor roll 7 in the axial direction of the coating roll 5. It is possible to prevent the particles from escaping to the coating roll 5 and to favorably adhere them to the coating roll 5.

[0028]

As described above, in the invention according to claim 1 of the present invention, in applying the coating material in which the granules are mixed only to the surface of the projecting portion of the building material having the projecting portion,
Use a coating roll with a large number of small grooves that contain particles on the outer peripheral surface, and use the coating roll containing the granules supplied between the coating roll and the doctor roll with the small grooves to project the surface of the building material. Since it is applied to the surface of the coating part, the particles in the small grooves provided on the outer peripheral surface of the coating roll are transferred to the surface of the protrusion. The paint containing particles can be effectively applied only to the surfaces of the projections without escaping, and the particles are transferred to the surfaces of the projections almost evenly so that the particles can be painted with a natural appearance.

In addition to the effect of the invention described in claim 1, the diameter of the inscribed circle of the small groove is 400 to 2000μ and the groove depth of the small groove is 100 to 1
Since it is 000μ, it is possible to apply the particle-containing coating material by putting the particles having a particle size of 10-500μ in the small groove and preventing the particles from escaping from the projection surface by the pressing pressure of the application roll at the time of transfer. Also, if too many particles enter the small grooves, the natural feeling after transfer is impaired, but by setting it within the above range, it is possible to paint without impairing the natural appearance.

According to the invention of claim 3, in addition to the effect of the invention of claim 1 or claim 2, the distance between the coating roll and the doctor roll is 0 ± 0.3 mm. , The granular paint supplied between the coating roll and the doctor roll is applied to the outer peripheral surface of the coating roll in an amount sufficient to properly adhere to the projecting surface of the building material. It can be properly applied and transferred to the surface of the protruding portion of the material.

According to the invention of claim 4, in addition to the effect of the invention of any one of claims 1 to 3, the rotational speed of the doctor roll is set to 0 of the rotational speed of the coating roll. Since it is 0.5 to 0.9 times, the particles can sufficiently pass through the gap between the coating roll and the doctor roll, and the desired natural feeling can be expressed.

According to the invention of claim 5, in addition to the effect of the invention of any one of claims 1 to 4, 10 particles of a particle size of 10 to 500 μ are added to the paint. ~
Since 40 parts by weight is mixed, the desired natural feeling can be exhibited by the granular paint.

According to the invention of claim 6, in addition to the effect of the invention of any one of claims 1 to 5, the viscosity of the paint is 70 to 130 seconds (Iwata cup No. 2). In addition, since the liquid temperature of the paint is 5 to 35 ° C., it is possible to apply an appropriate amount of paint only to the surface of the protrusion.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a roll coater device used in a surface coating method for a building material of the present invention.

FIG. 2 is a schematic view showing application of a coating material containing particles by the application roll of the above.

FIG. 3 is a schematic diagram showing application of a coating material containing particles by a conventional application roll.

[Explanation of symbols]

1 protrusion 2 building materials 3 grains 4 paint 5 coating rolls 6 small groove 7 Doctor roll

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toshimitsu Kurasaki             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company (72) Inventor Osamu Hatanaka             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company (72) Inventor Nobuaki Nishioka             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company (72) Inventor Toshio Nishihara             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company (72) Inventor Manabe Michifumi             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company (72) Inventor Manabu Mizutani             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company F-term (reference) 4D075 AC21 AC29 AC35 AC72 AC93                       AC94 AC96 CA47 DA07 DA36                       DB01 DB12 DB14 DC03 EC01                       EC53 EC54                 4F040 AA02 AB04 AC01 BA16 CB06                       CB26 CB36 CB37 DA14 DA15                       DA16 DA20

Claims (6)

[Claims] 1. When applying a paint in which granules are mixed only to the surface of the projecting surface of a building material having a projecting surface,
Use a coating roll with a large number of small grooves that contain particles on the outer peripheral surface, and use the coating roll containing the granules supplied between the coating roll and the doctor roll with the small grooves to project the surface of the building material. A surface coating method for building materials, which is characterized in that it is applied to the surface of a part. 2. The diameter of the inscribed circle of the small groove is 400 to 2000.
The method for coating a surface of a building material according to claim 1, wherein the groove depth of the small groove is 100 to 1000 µ. 3. The space between the coating roll and the doctor roll is 0.
The surface coating method for a building material according to claim 1 or 2, wherein the surface coating method is ± 0.3 mm. 4. The surface coating of a building material according to claim 1, wherein the rotation speed of the doctor roll is 0.5 to 0.9 times the rotation speed of the coating roll. Method. 5. Granules having a particle size of 10 to 500 μ are added to a paint in an amount of 1
The surface coating method for a building material according to any one of claims 1 to 4, wherein 0 to 40 parts by weight is mixed. 6. The viscosity of the paint is 70 to 130 seconds (Iwata cup No. 2) and the liquid temperature of the paint is 5 to 35 ° C., in any one of claims 1 to 5. Surface coating method for building materials in Japan.