JP3942860B2 - Finishing method for sealing the edge of inorganic building board - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The invention of this application relates to a finishing method in sealing an edge of an inorganic building board. More specifically, the invention of this application suppresses overlap with the sealing agent that has already been applied to the surface of the main body when the sealing agent is applied to the end cutting portion of the inorganic raw plate and sealed. The present invention relates to a finishing method in sealing an end portion of an inorganic building board which can prevent foaming of the sealing agent at the time and can make the coating of the sealing agent uniform over the entire inorganic raw board.
[0002]
[Prior art]
In general, an inorganic building board such as a cement board, which is widely known as an exterior material, is provided with a polymerizable fruit at the end so that a uniform appearance and waterproofness as an outer wall can be obtained.
[0003]
As one method of actual formation, there is known a method in which an end portion of a formed inorganic raw plate is cut by a cutting machine such as a router. In the manufacturing process of inorganic building boards, sealing agents such as water repellents and sealers are generally applied to the surface of the inorganic raw board before the above cutting process, to give water resistance and improve the adhesion of the finished paint. Therefore, the substrate is exposed to the surface of the end portion of the inorganic raw plate cut for actual formation. Therefore, sealing is performed again on the end portion of the cut inorganic raw plate.
[0004]
For example, as shown in the schematic process diagram of FIG. 2, the sealing of the end portion is performed by applying the sealing agent (12) from the paint gun (11) toward the end cutting portion (2) of the inorganic base plate (1). Dripping and applying via the shower nozzle (13), then squeezing the sealing agent (12) applied to the end cutting part (2) with the brush (14), and collecting or fading the sealing agent (12) Disappear and uniformize the application of the sealing agent (12) in the end cutting part (2).
[0005]
As shown in FIG. 2, the sealing of the side end face of the inorganic raw plate (1) is generally performed after the end cutting portion (2) is sealed. Sealing of the side end face of the inorganic base plate (1) is performed, for example, by supplying the sealing agent (12) from the paint gun (11) to the application roller (16) through the supply pipe (15), and then applying the application roller (16) to the inorganic base plate. After applying the sealing agent (12) to the side end face of the inorganic original plate (1) by rotating while making contact with the side end face of (1), the brush (14) is used in the same manner as the sealing of the end cutting part (2). It is carried out by squeezing the side end face of the inorganic raw plate (1) coated with the sealing agent (12).
[0006]
[Problems to be solved by the invention]
However, the following problems are pointed out in the sealing of the end cutting portion (2) of the inorganic base plate (1) described above.
[0007]
That is, when sealing the end cutting portion (2) of the inorganic raw plate (1), the surface of the main body (3) of the inorganic original plate (1) has already been sealed, and therefore, as shown in FIG. Even if the sealing agent (12) is applied using the shower nozzle (13) and rubbed with the brush (14), the sealing agent (12) applied to the end cutting portion (2) is already It is inevitable to overlap the sealing agent painted on the surface of the main body (3). This overlap of the sealing agent (12) reduces the adhesion to the decorative paint used in the finish coating performed after sealing, causing cracks on the surface of the inorganic building board, peeling of the decorative paint film, and the like. .
[0008]
Further, if ironing is performed only with the brush (14), foaming often occurs in the sealing agent (12) applied to the end cutting portion (2) of the inorganic original plate (1) in the drying step after sealing. Due to this foaming, the sealing lacks uniformity, which affects the water resistance and the like, and also reduces the adhesion to the decorative paint, as with the overlap of the sealing agent (12) described above.
[0009]
The invention of this application has been made in view of such circumstances, and when applying a sealing agent to an end cutting portion of an inorganic raw plate and sealing it, the sealing agent already applied to the surface of the main body is applied. Solves the problem of providing a finishing method for sealing the edges of inorganic building boards that suppresses the overlap of the sealant, prevents foaming of the sealant during drying, and makes the coating of the sealant uniform across the entire inorganic base. It is an issue to be done.
[0010]
[Means for Solving the Problems]
The invention of this application is to solve the above-mentioned problems, when applying a sealing agent mixed with a water repellent and a sealer to the end cutting portion of the inorganic raw plate and sealing it, and the end cutting portion and Inorganic building, characterized in that air is blown onto the surface of the adjacent main body with the air pressure on the main body surface side higher than the air pressure on the end cutting part side, and the coating of the sealing agent is made uniform over the entire inorganic base plate A finishing method in the sealing of a plate edge is provided (claim 1).
[0011]
In the invention of this application, the air blown to the end cutting part and the main body part surface is blown toward the step side surface periphery of the end cutting part located on the side close to the main body part surface (Claim 2). Is provided as an aspect.
[0012]
Hereinafter, the finishing method in the sealing of the end portion of the inorganic building board according to the present invention will be described in more detail with reference to the drawings.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1: is principal part sectional drawing which showed roughly one Embodiment of the finishing method in the sealing of the inorganic building board edge part of invention of this application.
[0014]
As illustrated in FIG. 1, in the finishing method for sealing the end of an inorganic building board according to the invention of this application, a sealing agent is applied to the end cutting portion (2) of the inorganic raw board (1) as before. When sealing, air (4) is blown onto the surface of the end cutting portion (2) and the main body (3) adjacent thereto from, for example, a plurality of air cut nozzles (5). The air pressure at this time is set so that the air pressure on the surface side of the main body (3) is higher than the air pressure on the end cutting part (2) side in the finishing method for sealing the end of the inorganic building board of the invention of this application. To do. Specifically, when the air pressure on the surface side of the main body (3) is about 0.5 MPa, the air pressure on the end cutting part (2) side can be about 0.2 MPa. This is merely an example, and the air pressure can be set to an appropriate size according to the viscosity of the sealing agent, the surface shapes of the end cutting part (2) and the main body part (3), and the like.
[0015]
Thus, the finishing method in the sealing of the end portion of the inorganic building board of the invention of this application is that the end cutting portion is applied when sealing the end cutting portion (2) of the inorganic raw plate (1) by applying the sealing agent. (2) and air (4) are sprayed on the surface of the main body (3) adjacent thereto, and the air pressure on the surface side of the main body (3) is set higher than the air pressure on the end cutting part (2) side. As a result, the sealing agent for sealing the end cutting portion (2) overlaps the surface of the main body (3) of the inorganic raw plate (1) with the already applied sealing agent on the main body (3). It can be removed by air (4) sprayed on the surface side of the sheet, and the air (4) sprayed on the end cutting part (2) eliminates the accumulation of the sealing agent that is likely to occur in the end cutting part (2). With It is possible to suppress the prone foaming-ring material during drying after coating. Therefore, the coating of the sealing agent is made uniform over the entire inorganic base plate (1). As a result, water resistance is imparted satisfactorily, adhesion with a decorative paint used for finish coating is improved, and generation of cracks on the surface of the inorganic building board, peeling of the decorative paint film, and the like are prevented.
[0016]
Further, by setting the air pressure blown to the inorganic original plate (1) higher on the surface side of the main body (3) than on the end cutting portion (2) side, it is possible to minimize scattering of unnecessary sealing agent. The working environment in the sealing process is well maintained.
[0017]
In addition, as shown in FIG. 1, the edge (2) and the air (4) sprayed on the surface of the main body (3) are both ends located on the side close to the surface of the main body (3). When sprayed toward the periphery of the stepped side surface (6) of the partial cutting portion (2), the above-described effects can be achieved even better.
[0018]
Such a finishing method for sealing the end of the inorganic building board according to the invention of this application can be incorporated as a post process of ironing with the brush (14) shown in FIG. 2, for example. Depending on the setting of the air pressure, it is possible to change to ironing with a brush (14).
[0019]
Moreover, in the finishing method in the sealing of the edge part of the inorganic building board of the invention of this application, the blowing of the air (4) is not limited to the air cut nozzle (5), as long as the desired effect is obtained. The member can be selected. The sealing agent, when used water repellent and sealer sealing, as long as both are capable of mixing, you applied to the end cutting portion of the inorganic master plate (1) the mixture as a sealing agent (2). For example, KBM3103C (Shin-Etsu Chemical) can be mixed as a water repellent, and multi-sealer A (Showa Polymer) can be mixed as a sealer. Multi-sealer A (70.04vol%) diluted with ethyl acetate (22.18vol%) and KBM3103C (7.78%) has a paint viscosity of 8.5 ± 1.0sec as measured by a viscometer, and the inorganic base plate (1) It can preferably be used as a sealing agent for the end cutting part (2) of the above. In this way, by using a sealing agent that is a mixture of a water repellent and a sealer, the production efficiency of the sealing of the end cutting portion (2) of the inorganic raw plate (1) is increased, and the space of the equipment is saved. It becomes possible to plan.
[0020]
And when the sealing of the end cutting part (2) of the inorganic base plate (1) including the finishing method in the sealing of the end of the inorganic building board of the invention of this application is repeated two or more cycles, the coating of the sealing agent is performed It becomes even more uniform, and various performances such as water resistance and adhesion to a decorative paint are improved.
[0021]
Of course, the invention of this application is not limited by the above embodiments. It goes without saying that various aspects are possible with respect to details such as the shape and size of the end cutting portion, the type and viscosity of the sealing agent, the air pressure, the type, number and structure of the air blowing member.
[0022]
【The invention's effect】
As described above in detail, according to the invention of this application, when applying a sealing agent to an end cutting portion of an inorganic raw plate and sealing it, the overlap with the sealing agent already applied to the surface of the main body is suppressed. In addition, foaming of the sealing agent that tends to occur during drying can be prevented. The coating of the sealing agent is made uniform over the entire inorganic base plate, improving the water resistance and adhesion to the decorative paint.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a cross-sectional view of an essential part schematically showing an embodiment of a finishing method in sealing an end of an inorganic building board according to the invention of this application.
FIG. 2 is a schematic process diagram illustrating sealing of an edge of an inorganic building board and the like performed before the invention of this application.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Inorganic base plate 2 End cutting part 3 Body part 4 Air 5 Air cut nozzle 6 Step side surface 11 Paint gun 12 Sealing agent 13 Shower nozzle 14 Brush 15 Supply pipe 16 Application roller

Claims (2)

When applying a sealing agent that is a mixture of a water repellent and a sealer to the end cutting part of the inorganic raw material and sealing it, air is applied to the end cutting part and the main body surface adjacent to the end cutting part. A finishing method in sealing an end of an inorganic building board, characterized in that the pressure is made higher than the air pressure on the end cutting part side and sprayed, and the coating of the sealing agent is made uniform over the entire inorganic base plate.   In the sealing of the edge part of an inorganic building board of Claim 1 which sprays the air sprayed to an edge part cutting part and a main-body part surface toward the level | step difference side surface periphery of the edge part cutting part located in the side close | similar to the main-body part surface. Finishing method.

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