JP4019780B2 - Surface coating method for building materials - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a surface coating method for a building material in which coating is performed by mixing particles only on the projections on the surface of the building material having projections on the surface.
[0002]
[Prior art]
Conventionally, the exterior with a natural feeling is painted only on the protrusions on the surface of building materials such as ceramic exterior building materials, metal building materials, interior building materials, etc. that have embossed on the surface, by mixing paint such as beads, sand, etc. In making this building material, it is done by spray coating after masking the part that you do not want to paint in advance, but in this conventional example, there are many paint loss (about 50% loss occurs), Solvent-based paints have a problem that the working environment is deteriorated, the processing cost of the collected non-paint is high, and further, the production efficiency is very poor because of masking paint.
[0003]
In addition, when applying with the application roll, after applying the paint only to the protrusions on the surface of the building material in advance with the application roll, particles such as beads, sand, etc. were further spread on the coating roll and dried. Thereafter, the protrusions were again painted on the same portion with an application roll to fix particles such as beads and sand. However, in this conventional example, it is necessary to apply the coating roll twice, and the particle distribution process is also required, the manufacturing process becomes complicated, the manufacturing equipment becomes large, and the cost is 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 that are not sufficiently covered with the paint film fall off and become poor quality. .
[0004]
Therefore, in the course of reaching the present invention, the inventor previously mixed particles 3 such as beads and sand into the paint 4, and applied the paint 4 mixed with the particles 3 to the surface of the building material 2 by the application roll 5. Although it considered that it apply | coats only to the part 1, when it is going to apply the coating material 4 containing the granule 3 only to the protrusion 1 of the surface of the building material 2 with the normal application roll 5, as shown to the schematic diagram of FIG. In addition, the granular material 3 flows out to the lower portion of the projection 1 together with the paint 4 as shown by the arrow a by the pressure of the application roll 5, and the granular material 3 cannot be transferred only to the projection 1 evenly. , It turns out that there is a problem that the commercial value will be reduced.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of the above points, and it is possible to apply the coating material containing the granules only to the protrusions on the surface of the building material by the application roll and to transfer the particles evenly to the protrusions. An object of the present invention is to provide a surface coating method for building materials that can be made into a natural appearance by a simple method.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the surface coating method for a building material according to the present invention applies the paint 4 to the particles 3 having a particle diameter of 10 to 500 μm only on the surface of the protrusion 1 on the surface of the building material 2 having the protrusion 1 on the surface. In applying 10 to 40 parts by weight of the paint 4 mixed therein, a small groove 6 into which the granule 3 having an inscribed circle diameter of 400 to 2000 μ and a groove depth of 100 to 1000 μ enters the outer peripheral surface as the coating roll 5. Using a large number of those formed, the coating material 4 containing the granules 3 supplied between the application roll 5 and the doctor roll 7 in which the small grooves 6 are formed is applied to the surface of the protrusion 1 on the surface of the building material 2 by the application roll 5. It is characterized by doing. By adopting such a method, when the coating material 4 with the granules 3 is adhered to the coating roll 5 and the coating material 4 with the granules 3 is applied to the surface of the protrusion 1 on the surface of the building material 2, The granule 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 with the granular material 3 in the small grooves 6 to transfer the coating 4. Therefore, the granule 3 does not escape together with the coating material 4 due to the pressing pressure of the coating roll 5, and the coating material 4 containing the granule 3 can be effectively applied only to the surface of the projection 1 so that the granule 3 is projected. It is transferred almost uniformly to one surface, and the granule 3 gives a natural appearance.
[0008]
Moreover, it is preferable that the space between the coating roll 5 and the doctor roll 7 is 0 ± 0.3 mm. By adopting such a method, an amount of paint that allows the paint 4 containing the granules 3 supplied between the paint roll 5 and the doctor roll 7 to be properly brought into close contact with the surface of the projection 1 of the building material 2. 4 is adhered 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 to the surface of the projection 1 of the building material 2.
[0009]
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 granule 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.
[0011]
Moreover, it is preferable that the viscosity of the coating material 4 is 70 to 130 seconds (Iwata Cup No. 2) and the liquid temperature of the coating material is 5 to 35 ° C. By adopting such a method, an appropriate amount of the coating material 4 can be applied only to the surface of the protrusion 1.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.
[0013]
FIG. 1 is a schematic configuration diagram of a roll coater device used in the surface coating method for building materials according to the present invention.
[0014]
In the figure, reference numeral 5 denotes a coating roll, which is formed of extremely soft rubber (rubber hardness of 20 degrees or less), and a large number of small grooves 6 are formed on the outer peripheral surface by etching.
[0015]
In the figure, 7 is a doctor roll, and 8 is a backup roll. And the coating material 4 which mixed the granule 3 is supplied between the upper part between the application roll 5 and the doctor roll 7, the coating material 4 containing the granule 3 is transcribe | transferred to the application roll 5, and also the application roll 5 makes the application roll 5 The coating 4 containing the granules 3 is applied and transferred to the surface of the building material 2 that is transported between 5 and the backup roll 8.
[0016]
The building material 2 has an uneven surface and is a ceramic exterior building material, a metal building material, an interior building material or the like. In the present invention, the grain is formed only on the protrusions 1 on the surface of the uneven building material 2. The paint 4 containing the body 3 is applied and transferred.
[0017]
The particles 3 mixed in the paint 4 are beads, sand, etc., and the particle size is 10 to 500 μm. The paint 4 may be either a solvent-based paint or a water-soluble paint, but the particles 3 having a particle size of 10 to 500 μm are added to the paint 4 so that the natural feeling of the particles 4 such as beads and sand can be obtained. -40 parts by weight is mixed. Further, the viscosity of the coating material 4 is set to 70 to 130 seconds (Iwata Cup No. 2), and the liquid temperature of the coating material 4 is set to 5 to 35 ° C.
[0018]
A large number of small grooves 6 formed by etching on the outer peripheral surface of the coating roll 5 are small grooves having an inscribed circle diameter of 400 to 2000 μ so that at least a plurality of particles 3 mixed in the paint 4 can enter. The groove depth of 6 is 100 to 1000 μm. 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.
[0019]
The space 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 the same as that of the coating roll 5. The rotation speed is 0.5 to 0.9 times.
[0020]
Thus, the building material 2 is passed only between the coating roll 5 and the backup roll 8 with the surface irregularities on the top, and the coating roll 5 allows the granules only on the surface of the protrusion 1 on the surface of the building material 2. The coating material 4 containing 3 is applied and transferred.
[0021]
In this case, the coating material 4 containing the granules 3 supplied between the application roll 5 and the doctor roll 7 is wound around the application roll 5 and rotates while adhering to the outer peripheral surface of the application roll 5. At this time, the granules 3 mixed in the paint 4 enter the numerous small grooves 6 on the outer peripheral surface of the coating roll 5 and are pressed against the surface of the protrusion 1 on the surface of the building material 2 in this state. Is transcribed. In order to apply and transfer the coating material 4 by pressing the coating roll 5 against the surface of the projection 1 of the building material 2 with the granule 3 in the small groove 6, the pressing pressure of the coating roll 5 as shown in FIG. Thus, the coating material 4 containing the granule 3 can be effectively applied and transferred only to the surface of the protrusion 1 without the particle 3 escaping together with the paint 4, and the particle 3 is transferred to the surface of the protrusion 1 almost evenly. The body 3 can have a natural appearance.
[0022]
Here, as described above, since the diameter of the inscribed circle of the small groove 6 is 400 to 2000 μ and the groove depth of the small groove 6 is 100 to 1000 μ, the particles 3 having a particle diameter of 10 to 500 μ placed in the small groove 6 are obtained. A large number of particles 3 having a particle diameter of 10 to 500 μm entering the small groove 6 in the protrusion 1 on the surface of the building material 2 together with the paint 4 are transferred to the surface of the protrusion 1 as they are, and the plurality of particles 3 are solidified together with the paint. What appears to be a lump of particles is uniformly formed on the surface of the protrusion 1, and a design expression can be made as if a large particle is distributed on the surface of the protrusion 1.
[0023]
In addition, as described above, the coating 4 containing the granular material 3 supplied between the coating roll 5 and the doctor roll 7 is constructed by setting the gap between the coating roll 5 and the doctor roll 7 to 0 ± 0.3 mm. An amount of paint 4 that can be properly adhered to the surface of the protrusion 1 of the material 2 is attached to the outer peripheral surface of the application roll 5, and the paint 4 containing the granules 3 is applied appropriately to the surface of the protrusion 1 of the building material 2. You can transfer. If the distance between the coating roll 5 and the doctor roll 7 is outside 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. The coating material 4 containing the granules 3 is not preferable because it does not adhere to the outer peripheral surface of the coating roll 5 in an appropriate amount.
[0024]
In addition, as described above, 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 as described above, because of the difference between the rotation speed of the doctor roll 7 and the coating roll 5. The coating material 4 containing the granules 3 can be passed between the application roll 5 and the doctor roll 7 and effectively adhered to the outer peripheral surface of the application roll 5. What is effectively drawn and adhered to the roll 5 side, and the coating roll 5 applies the paint 4 containing the granules 3 to the surface of the projecting portion 1 of the building material 2 so that the natural expression by the granules 3 can be effectively expressed. It is.
[0025]
In the present invention, 10 to 40 parts by weight of particles 3 having a particle size of 10 to 500 μm are mixed in the paint 4, but if the amount of particles 3 to be mixed is too small, the desired natural feeling cannot be expressed. In addition, if the amount of the particles 3 to be mixed is too large, the handling of the coating material 4 in coating operations such as liquid feeding and dilution of the coating material 4 will be hindered.
[0026]
Moreover, in this invention, the viscosity of the coating material 4 shall be 70-130 second (Iwata cup 2), and the liquid temperature of the coating material 4 shall be 5-35 degreeC. Here, the liquid temperature of the paint 4 is set to 5 to 35 ° C. If the temperature of the paint 4 is less than 5 ° C., the temperature of the paint 4 is too low, the viscosity becomes high and the coating amount increases, and the subsequent baking is performed. Further, when the temperature of the paint 4 exceeds 35 ° C., the temperature of the paint 4 becomes too high and the viscosity becomes low, so that the paint 4 drips down from the protrusion 1 of the building material 2 and flows down. Therefore, it is not preferable.
[0027]
In addition, you may make it form many small grooves also in the outer peripheral surface of the doctor roll 7, In this case, the granule 3 escapes in the axial direction of the application roll 5 between the application roll 5 and the doctor roll 7 further. Is prevented and can be satisfactorily adhered to the coating roll 5.
[0028]
【The invention's effect】
As described above, in the invention according to the first aspect of the present invention, particles having a particle diameter of 10 to 500 μm are only 10 to 40 wt% in the paint only on the protrusion surface of the building material having the protrusion on the surface. When coating the paint mixed in part , an application roll having a plurality of small grooves into which the granules having an inscribed circle diameter of 400 to 2000 μ and a groove depth of 100 to 1000 μ enter is formed on the outer peripheral surface. The coating material containing granules supplied between the formed application roll and doctor roll is applied to the protruding surface of the surface of the building material by the application roll, so that it entered into the numerous small grooves provided on the outer peripheral surface of the application roll. Grain will be transferred to the surface of the protrusion, and the granule will not escape from the surface of the protrusion due to the pressing pressure of the application roll, and the particle-containing paint can be effectively applied only to the surface of the protrusion, Particles are almost even on the surface of the protrusion It is transferred those that can be painted appearance with natural appearance by granules.
[0030]
In addition, in the invention described in claim 2 , in addition to the effect of the invention described in claim 1, since the space between the coating roll and the doctor roll is 0 ± 0.3 mm, the coating roll and the doctor roll Appropriate amount of paint on the outer surface of the applicator roll to properly adhere the granular paint supplied during the period to the surface of the projecting part of the building material. It can be applied to and transferred to.
[0031]
In addition, in the invention described in claim 3 , in addition to the effect of the invention described in claim 1 or 2 , the rotation speed of the doctor roll is 0.5 to 0.9 times the rotation speed of the coating roll. Therefore, the granules can sufficiently pass through the gap between the application roll and the doctor roll, and the desired natural feeling can be expressed.
[0033]
In the invention according to claim 4 , in addition to the effect of the invention according to any one of claims 1 to 3 , the viscosity of the paint is set to 70 to 130 seconds (Iwata Cup No. 2). At the same time, since the liquid temperature of the paint is 5 to 35 ° C., an appropriate amount of paint can be applied only to the surface of the protrusion.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a roll coater device used in a surface coating method for building materials according to the present invention.
FIG. 2 is a schematic view showing application of a paint containing particles by the application roll.
FIG. 3 is a schematic diagram showing application of a particle-containing paint by a conventional application roll.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Protrusion 2 Construction material 3 Granule 4 Paint 5 Application roll 6 Small groove 7 Doctor roll

Claims (4)

When coating a coating material in which 10 to 40 parts by weight of particles having a particle size of 10 to 500 μ are mixed in the coating surface only on the surface of the projecting material having a projection on the surface, an inscribed circle is applied to the outer peripheral surface as an application roll. A coating material containing granules, which is formed between a coating roll and a doctor roll formed with a plurality of small grooves into which the granules having a diameter of 400 to 2000 μ and a groove depth of 100 to 1000 μ are contained. A surface coating method for a building material, characterized in that a coating roll is applied to the surface of a protrusion on the surface of the building material. 2. The method of surface coating a building material according to claim 1, wherein a space between the coating roll and the doctor roll is 0 ± 0.3 mm. The method of surface coating a building material according to claim 1 or 2, wherein the rotation speed of the doctor roll is 0.5 to 0.9 times the rotation speed of the coating roll. The surface of a building material according to any one of claims 1 to 3, wherein 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. How to paint.

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