JP2001009333A - Production of coated construction board, construction board coating apparatus, and coated construction board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a coated construction board with high productivity and able to be variously designed thereon, a construction board coating apparatus to be employed for the production, and a coated construction board excellent in design. SOLUTION: A coating face 10A of a construction board 10 is coated with a pattern of, for example, squares arranged in a lattice. While a rim 131 to which a screen 120 having an opening pattern OP corresponding to the pattern is circularly attached is rotated and circularly moved synchronously with the transportation of the construction board 10, a coating material P is sprayed from a low-pressure air-less gun 141 through the circular screen 120 to apply the coating material P to the prescribed positions of the coating face 10A of the construction board 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a painted building board, an apparatus for painting a building board, and a painted building board, and more particularly to a painted building which can cope with various designs and has good productivity. The present invention relates to a method for manufacturing a board, a coating apparatus for a building board used for the same, and a painted building board having good design.

[0002]

2. Description of the Related Art Painted building boards in which various designs such as geometric patterns, marble patterns, brickwork patterns, and masonry patterns have been applied to interior and exterior materials of buildings, floor materials, wall materials, ceiling materials, and the like. Is used. Some of these building boards have a painted surface that is roughly flat and have a predetermined pattern or pattern formed thereon, but in addition, brick and stone masonry patterns, etc. Some are also given the color of. In manufacturing such a painted building board, when a paint is applied to a predetermined portion of a building board painted surface to form a design, for example, the painted surface of the building board is set up, and the upper side is set. A screen having a predetermined opening pattern, a flat-plated screen is arranged, and a paint is applied to a painted surface while moving a spray gun or the like. Also, on the painted surface, for example, to form irregularities corresponding to the brick portion and the joint portion, to make the two colors different, first,
Using a spray gun, a roll coater, a flow coater, or the like, a first coating material layer is formed on the entire coating surface with a paint having a joint portion (recess) color. Thereafter, the brick portion (convex portion) was colored with the second coating material layer using a roll coater, and the convex portion and the concave portion were separately applied.

[0003]

However, in such a method, since the building board is set once, the screen is arranged, and then the coating is started, the coating takes a long time and the productivity of the painted building board is low. Was. For this reason, there has been a demand for a method and a coating apparatus capable of producing at a higher speed. Further, in the second method, since the second coating material layer is formed even on the side surface of the convex portion (side surface of the concave portion) between the concave portion and the convex portion, the boundary between the concave portion and the convex portion is blurred, and a natural feeling is obtained. (Tone) may not be applied separately. In addition, for example, in a case where a partially missing portion is formed in a brick portion to make the shape more natural (real), irregularities may be provided in the convex portion in order to further enhance the design. However, when the irregularities are severe, there are portions where the paint cannot be applied even if the paint is applied to the protrusions by a roll coater, and thus the design of a building board that can be manufactured may be limited.

The present invention has been made in view of the above-mentioned problems, and has a high productivity, a method of manufacturing a painted building material capable of applying various designs to a building board, and a building board coating used therefor. It is an object of the present invention to provide a painted architectural board having a good design such as an apparatus or an island-shaped convex portion that looks prominent.

[0005]

Means for Solving the Problems, Actions and Effects The solution is achieved by circulating a screen having a predetermined opening pattern and being stretched in a substantially annular shape in synchronization with the transport of a building board. A method of manufacturing a painted building board, comprising a coating step of coating a coating material on a painted surface of the building board via the above.

In the method of manufacturing a painted building board of the present invention, a coating material is applied to the painted surface of the building board while circulating and moving the substantially annular screen in synchronization with the transport of the building board.
Therefore, the painted surface is painted when the building board is transported, so that the productivity of the painted building board can be increased. further,
Even if the building board and the screen are moved in synchronization with each other, if the screen is not stretched in a substantially annular shape that can be circulated, such as being stretched into a flat plate or being rolled up sequentially, After the coating material is applied, the operation of returning the screen to the original position is required. On the other hand, if the screen stretched in a substantially annular shape is circulated, the screen does not need to be returned, and if it is circulated in one direction, it can be used again, so that the productivity can be further improved. In addition, since the screen that is stretched in a substantially annular shape only needs to be circulated and moved in a certain direction at the time of painting, the movement of the screen can be easily controlled.

[0007] The building board may be any building board that is used for the interior and exterior of a building and that has a painted surface coated with a coating material. Examples include a plate, a metal material, a resin material, and a composite material thereof. In addition, as a coating material, other than paint, resin beads, color sand, aggregates such as anti-friction particles,
A mixture of these aggregates in a paint or the like is also included. In addition, as a method of coating the aggregate, a coating film in an undried state is formed in advance on the painted surface, and sprayed on this, mixed with the paint, and painted, or the paint is applied after spraying the aggregate. In addition, as the screen,
In addition to a ring-shaped (O-shaped, endless) screen in which the front and rear ends of the band-shaped screen are directly connected, the band-shaped screen is held by a separate member so that the screen is stretched substantially in a ring shape as a whole. Alternatively, a belt-shaped screen may be used in which the front end and the rear end are connected by a separate member to form a ring shape as a whole. In these cases, the front and rear ends of the screen do not come into contact with each other, leaving a gap between them, and the screen includes only a part of a ring such as a C-shape when viewed only. Alternatively, a plurality of band-shaped screens may be connected to each other so as to be stretched in a substantially annular shape as a whole. Also,
The screen does not need to be stretched in a cylindrical shape, and the moving path of the screen may be straight or bent in the middle.

The screen is made of a metal screen such as a stainless steel plate, an aluminum plate, a copper plate or the like, a fluororesin, a metal screen such as a stainless steel plate, an aluminum plate, a copper plate, or the like. For example, a metal mask type or resin mask type screen having an opening formed through a resin plate such as a metal plate can be used. Further, in one screen, an opening pattern corresponding to one building board is not limited to being formed, and a plurality of opening patterns may be formed continuously.

Further, in the above-mentioned method for producing a painted building board, a portion of the screen used for painting the painting material is cleaned and then used again for later painting. It is good to use a method for manufacturing painted building boards.

In this way, when coating the coating material,
Since the cleaned part is always used, if the screen becomes dirty, unnecessary paint will adhere to the building board, and the unnecessary paint overlaid on the screen will change the shape of the opening pattern. The trouble of changing the pattern is prevented, and good painting can be always performed.

Any known method can be used for cleaning the screen, and examples thereof include scraping of unnecessary paint using a blade or an air curtain, scraping with a brush, and wiping with a sponge. . Further, several types of cleaning methods may be combined.

[0012] Further, in the method for manufacturing a painted building board according to any one of the above, the painted surface of the building board is formed in a predetermined concavo-convex pattern, and the opening pattern of the screen is a concave or convex part of the concavo-convex pattern. It is preferable to provide a method for manufacturing a painted building board, which is characterized by an opening pattern corresponding to a part of the shape.

When the opening pattern of the screen is formed in a shape corresponding to the concave portion (or a part thereof) as described above, it is ensured that only the concave portion (or a part thereof) of the painted surface of the building board is formed.
The coating material can be painted in a shape according to the opening pattern. That is, unlike the conventional building board, the coating material can be applied to the concave portions instead of the convex portions. For this reason,
First, a first coating material layer is formed on the entire painted surface with a paint of a color of a convex portion (for example, a brick portion of a brick pattern or a stone portion of a masonry pattern), and then a concave portion (for example, a joint portion or a gap portion).
Can be colored with the second coating material layer using the present invention. By doing so, the boundary between the convex portion and the concave portion becomes clear, and the color can be applied in a more natural and near-real tone, thereby improving the design of the building board. Further, even in the case where there is unevenness in the convex portion, such as forming a partially missing portion in the brick portion, the first coating material layer may be formed by spraying or the like. Can be painted, and the width of designs that can be manufactured with building boards can be expanded.

When the opening pattern is to be an opening pattern having a shape corresponding to a part of the recess, a mask type screen is used. For example, there is a case where a coating material is applied to a part. In the former case,
If the coating is repeated using a plurality of screens having different opening patterns, the coating material can be applied to the entire concave portion.
That is, the method for manufacturing a painted building board according to any one of the above, wherein the painted surface of the building board is formed in a predetermined uneven pattern, and the opening pattern of the screen is a part of a concave portion of the uneven pattern. It is an opening pattern corresponding to the shape of the above, after the coating step, the coating step is repeated using a screen having an opening pattern corresponding to another part of the recess, the coating material is applied to the entire recess. It is preferable to use a method for producing a painted building board as a feature.

Still another means for solving the problem is a building board coating apparatus, comprising: a conveying means for conveying the building board; a screen having a predetermined opening pattern formed therein and having a substantially annular shape;
Screen circulation moving means for circulating and moving the screen in synchronization with the transport of the building board, and coating material coating means for painting a coating material on the painting surface of the building board through the moving screen, It is a feature of the building board coating equipment.

In the apparatus for coating a building board of the present invention, the screen stretched in a substantially annular shape by the screen moving means circulates and moves in synchronization with the transport of the building board, and the coating material coating means applies the screen to the building board via the screen. A coating material is coated on the coating surface in a coating pattern according to the opening pattern. For this reason, according to this coating apparatus, since the painted surface is painted with the transport of the building board, the productivity of the painted building board can be increased. Moreover, since the screen is stretched in a substantially annular shape, it is not necessary to perform a return operation of returning the screen to its original state after the coating material is once applied to the building board, thereby increasing productivity. In addition, since the screen circulation moving means only needs to constantly circulate the screen in a certain direction during painting,
Mechanism and drive control can be simplified.

The conveying means may be any means as long as it can convey the building board. For example, a roller conveyor or a belt conveyor can be used. In addition, as a coating material coating means, any means can be adopted as long as the coating material can be coated on a building board,
For example, an airless spray gun, an air spray gun and the like can be mentioned. Also, a flow coater can be used. In particular, an airless spray gun is preferable because the rebound of the coating material can be suppressed.

Further, it is preferable that the paint is ejected by a low-pressure airless spray gun in the form of a liquid film such as a tab tail, and the film is applied to a building material.
That is, in the building board coating apparatus, the coating material coating means is a paint film spraying means for spraying paint in the form of a liquid film and applying the liquid film form paint to the coating surface of the building board. It is preferable to provide a building plate coating apparatus characterized by the above. This is because the paint can be uniformly applied to the paint surface in a shape according to the opening pattern.

Still further, in the building board coating apparatus, the coating material coating means can simultaneously coat the coating material over a dimension wider than the dimension of the building board in a direction orthogonal to the conveying direction. It is good to be a building board coating device characterized by the above.

In this way, for example, when the building board is transported in the longitudinal direction, it is possible to simultaneously apply the coating material over a dimension wider than the width of the building board. Therefore,
By simply transporting the building board, the coating material can be applied to any position on the coating surface in a shape according to the opening pattern, so that the coating can be performed easily and quickly. Further, even when the opening pattern is changed by replacing the screen or the like, there is no need to change the coating material coating means, and the setup change and the like are facilitated.

The building board coating apparatus according to any one of the above, further comprising a cleaning means for cleaning a portion of the screen used for coating the coating material. Good.

By providing the coating device with the cleaning means, the cleaned portion of the screen is always used when coating the coating material, so that the unnecessary contamination of the screen causes the unnecessary coating material to be applied to the building board. Adhesion or overcoating on the screen prevents unnecessary paint from changing the shape of the opening pattern, thereby preventing problems such as changing the paint pattern and making the paint pattern unclear, and can always provide good paint. As the cleaning means, any device capable of cleaning the screen can be used. For example, a mechanism for scraping an unnecessary coating material using a blade or an air curtain whose tip is in contact with the screen, or a mechanism for scraping with a brush And a removing mechanism using a roller-like brush capable of exuding a solvent capable of dissolving the paint from the inside, a wiping mechanism using a sponge, and the like. Further, several types of cleaning mechanisms may be combined.

[0023] Further, in the building plate coating apparatus according to any one of the above, between the coating material coating means and the screen, a shield for shielding a coating material traveling in an unnecessary direction from the coating material coating means. It is preferable to provide a building board coating apparatus characterized by comprising means.

By providing the shielding means in this way, the coating material which has proceeded in an unnecessary direction is prevented from adhering to equipment such as a building board or a conveying roller, so that a coating pattern defect due to unexpected adhesion of the coating material is prevented. Can be prevented.

Still further, in the building board coating apparatus according to any one of the above, the opening pattern of the screen corresponds to a concave portion of a concavo-convex pattern formed on a painted surface of the building board or a shape of a part thereof. It is preferable to use a building plate coating apparatus characterized in that the opening pattern is defined.

Since the opening pattern of the screen is formed in a shape corresponding to the concave portion (or a part thereof), the building plate coating apparatus ensures that only the concave portion (or a part thereof) of the painted surface of the building plate is opened. The coating material can be applied to the concave portions in a shape according to the pattern. That is, according to this building board coating apparatus, unlike the related art, the coating material can be coated not on the convex portion but on the concave portion. For this reason, first, the first paint is applied to the entire painted surface with a paint of a convex portion (for example, a brick portion).
If a building board on which a coating material layer has been formed is prepared, then the concave portion (for example, a joint portion) is coated with the second coating device using this coating device.
A coating material layer can be formed and colored. By doing so, the boundary between the convex portion and the concave portion becomes clear, and it is possible to apply the color more naturally and closer to the real thing, thereby improving the design of the building board. In addition, even when there are irregularities in the projections, if the first coating material layer is formed by spraying or the like, the coating material can be applied to the entire projections, so that the width of the design that can be manufactured with a building board can be increased. be able to.

When the opening pattern is to be an opening pattern having a shape corresponding to a part of the recess, a mask type screen is used, so that the entire recess cannot be painted with one type of opening pattern. Can be
In this case, the coating material is applied to the entire concave portion by repeating the coating using a plurality of screens having different opening patterns.

[0028] Further, in the building board coating apparatus according to any of the above, it is preferable that the screen is disposed in non-contact with the building board. This is to prevent the screen from being deformed or scratched due to contact with the building board, because the building board may have some warpage or undulation.

Still another solution is to provide a coating surface having a predetermined uneven pattern including an island-shaped convex portion and a concave portion surrounding the island-shaped convex portion, a first coating material layer coated on the entire surface of the coated surface, And a second coating material layer coated on the first coating material layer in the concave portions of the concave-convex pattern.

Conventionally, as described above, the first surface
After coating the coating material layer, a second coating material layer was formed on the projections of the uneven pattern by a roll coater or the like. For this reason, since the second coating material layer is formed up to a part of the side surface of the convex portion (the side surface of the concave portion) which is the boundary between the convex portion and the concave portion, the boundary between the two may be blurred or unnatural. was there. Further, when it is desired to further form irregularities in the convex portions, the coating may not be performed. On the other hand, in the present invention, the first coating material layer is coated on the island-shaped convex portions, and the second coating material layer is further coated on the first coating material layer on the concave portions surrounding the convex portions. Therefore, the boundary between the convex portion and the concave portion becomes clear. In addition, since the first coating material layer is formed on the entire surface of the coating surface, it can be uniformly formed even if the projections have some irregularities. Further, for example, when the entire periphery of the island-shaped convex portion is surrounded by a concave portion using a black (dark color) coating film having a hiding power as the second coating material layer, the convex portion looks conversely tight. Alternatively, if the entire periphery of the island-shaped convex portion is surrounded by a concave portion using a white (light color) coating film having a hiding power as the second coating material layer, the convex portion is prominently conspicuous by the second coating material layer of the concave portion. The design can be improved, for example, it can be seen, and it can respond to various designs, such as finishing in a more natural and near-real tone.

In particular, in the case of brick and stone masonry patterns, consumers can relatively easily discriminate the difference from the real ones. Therefore, a building board that is closer to the real ones and has a high design property is required. On the other hand, if the island-shaped convex portion is a brick portion or a stone portion of a brick pattern or a masonry pattern, and the concave portion surrounding the same is a painted building board that is a joint portion or a gap portion, the convex portion and the concave portion Can be painted clearly, so that it can be painted in a tone close to the real thing, and it is possible to obtain a painted architectural board having high designability, which is preferable. In addition, in order to protect them on the first and second coating material layers, a material in which a clear paint or the like is further applied on the entire surface is also included.

[0032]

(Embodiment 1) A first embodiment of the present invention will be described with reference to the drawings. First, the building board 10 painted in the present embodiment will be described. Building board 1
Numeral 0 is an inorganic plate called a ceramic building plate mainly composed of fiber and cement, and is a rectangular plate having a width W and a length L as shown in a plan view and a sectional view in FIG. The substantially flat painted surface 10A has a coating material P as described later.
Is applied, the coating material layer 14 is formed in a pattern in which squares shown by broken lines are arranged in a staggered manner.

Next, the building board coating apparatus 100 according to this embodiment will be described. The coating apparatus 100 whose outline is shown in FIG. 2 includes a roller conveyor 110, a screen 120, a screen circulation moving mechanism 130, a spray mechanism 140, and a cleaning mechanism 150. Among these, the roller conveyor 110 transports the building board 10 in the direction shown by the arrow 110A (from left to right in the figure) with the painted surface 10A facing upward in the figure along the transport surface 112 shown by the broken line in the figure. And a large number of rollers 111. The screen 120 is provided on the rim 13 described below.
1 is a belt-shaped stainless steel screen stretched in a substantially cylindrical ring shape, is located above the roller conveyor 110 in the figure, and has an opening pattern described later (see FIG. 4). In the present embodiment, a screen on which an opening pattern corresponding to one building board 10 is formed is used. The screen 120 is kept out of contact with the building board 10 during painting.

The screen circulation moving mechanism 130 holds the screen 120 in a cylindrical shape while
(Counterclockwise direction in the figure). The rim 131 has a shape in which approximately two circular rings are coaxial and arranged at predetermined intervals, and holds the screen 120 in a state of being stretched in a substantially cylindrical shape. This rim 131
An annular gear portion 131G is provided on the periphery thereof. Since the annular gear portion 131G meshes with the gear 132, the rotation of the rim 131 is controlled via the gear 132 by the stepping motor 133 connected to the shaft 132R of the gear 132. Further, the screen circulation moving mechanism 13
0 is a building material sensor 133 for detecting the position of the building material 10
A, 133B, and 133C. When the building material 10 reaches a predetermined position when the building material 10 is transported, the building material sensor 133A and the like generate signals SGA, SGB, and SGC, respectively. Also, the tip 12 of the screen 120
It has a screen sensor 134 for detecting 0F (see FIG. 4), and generates a signal SGD when the tip of the rotating screen reaches the detection position of the screen sensor 134. In the present embodiment, the circumference of the rim 131 (the screen 120) is slightly longer than the length L of the building board 10. Therefore, the diameter of the rim 131 (screen 120) is also slightly larger than L / π. The rim 131 rotates once and the screen 120 circulates once, so that one building board 10 can be painted.

The low-pressure airless spray gun 141 of the spray mechanism 140 is located below the center axis 131C of the rim 131 in the figure, and the architectural plate 10 and the screen 120 are the most lower of the annular screen 120 in the figure. At the approaching position, the coating material P is jetted from the inner peripheral side of the screen 120 toward the building board 10 via the screen 120. Specifically, the coating material P, which has been fed at a relatively low pressure (0.3 to 4.0 kg / cm2) through the pipe 142, is jetted from the low-pressure airless spray gun 141. As can be easily understood with reference to FIG. 3, a plurality of low-pressure airless spray guns 141 are arranged side by side in a direction perpendicular to the plane of FIG. Each of the low-pressure airless spray guns 141 is equipped with, for example, a cross cut nozzle (not shown) manufactured by Nordson Corporation. Each of the low-pressure airless spray guns 141 applies a coating material P in the form of a tab-tailed liquid film PF in a direction perpendicular to the paper of FIG. It can be jetted without gaps. When the coating material P is ejected in the form of the liquid film PF, the building material 10 can be uniformly coated.

As shown in FIG. 3, the dimension WP in the direction (width direction WD) orthogonal to the transport direction 110A of the coating material P ejected by the many low-pressure airless spray guns 141 is the width W of the building material 10. Has been larger than. Further, the width is smaller than the width WS of the screen 120 indicated by the broken line. Therefore, each low-pressure airless spray gun 1
The coating material P can be applied to the building board 10 in accordance with an arbitrary opening pattern formed on the screen 120 without changing the arrangement of 41. The screen 12
It is not necessary to change the arrangement of the low-pressure airless spray gun 141 even if 0 is changed to another opening pattern.

Further, the cleaning mechanism 150 removes the unnecessary coating material PR attached to the screen 120 from the screen 120. Specifically, the inner peripheral surface 120A of the screen 120
A steel blade 15 that abuts the tip 151S of the steel blade 15 to scrape off the unnecessary coating material PR attached to the inner peripheral surface 120A.
1 and a roll brush 152. The roll brush 152 is sent through a pipe 152H, and a solvent (specifically, water) SL capable of dissolving the unnecessary coating material PR exudes from the inside. The unnecessary coating material PR scraped by the blade 151 is collected through the tray 151D and the collection pipe 151E, and is reused for coating.
In the present embodiment, the blade 151 and the roll brush 152 for cleaning the inner peripheral surface 120A of the screen 120 are provided as the cleaning mechanism 150. However, for example, as shown in a roll brush 153 shown by a broken line in FIG. May be provided for cleaning the outer peripheral surface 120B.

Further, the screen 120 and the rim 131
Is controlled so as to rotate (circulate) in synchronization with the transport of the building board 10. Specifically, according to a control program stored in a ROM of a control computer (not shown) having a ROM and a RAM, the roller conveyor 110
, The rotation of each roller 111, and thus the transport speed of the building board 10 are controlled. Also, the rim 1 is connected via the stepping motor 133 and the gear 132 of the screen circulation moving mechanism 130.
The rotation of the screen 31 and thus the rotation speed (peripheral speed) of the screen 120 are also controlled. The control computer outputs signals S from the building board sensors 133A to 133C for detecting the building board 10.
Based on GA to SGC and a signal SGD from a screen sensor 134 that detects the front end 120F of the screen 120, the transport speed of the roller conveyor 110 and the rotation speed (peripheral speed) of the screen 120 (specifically, the rim 131).
Adjust so that it matches. At the same time, building board 10
The transporting timing of the screen 120 and the advance timing of the screen 120 are also adjusted, and the building material 10 is adjusted in a state where the position of the coating surface 10A of the building material 10 and the opening pattern (see FIG. 4) formed on the screen 120 are aligned. Paint material P
Is adjusted to be injected.

With such a coating apparatus, the building board 10 is conveyed by the roller conveyor 110, and the coating material P is applied in accordance with the opening pattern of the screen 120 which rotates (circulates and moves) in synchronization with the building board. Later,
By performing drying and baking at a predetermined temperature and time according to the properties of the coating material P, a coating material layer having a pattern according to the opening pattern OP can be formed on the building board 10. Because of this, the application of the coating material P to the building board 10 can be completed in a very short time, and the productivity can be increased. Moreover, since the screen 120 is stretched in a substantially cylindrical shape, it is sufficient that the screen 120 is always rotated in the direction of the arrow 120S (counterclockwise in the drawing) and circulates, and the reversing operation (return operation) is unnecessary. is there. Therefore, since the building board 10 can be conveyed one after another to apply the coating material P, the productivity is particularly high. Further, since the reversing operation is not required, the movement control of the screen 120 can be simplified.

Further, the unnecessary coating material PR adhering to the screen 120 is removed by the cleaning mechanism 150, and when the next building material 10 is coated, the cleaned portion can always be used. For this reason, a defect due to the unnecessary coating material PR adhering to the screen 120, for example, the shape of the peripheral portion of the opening pattern changes due to the adhesion to the building material 10 or the stacked unnecessary coating material, resulting in a defective shape of the coating pattern. There is no problem such as the following. In addition, the low-pressure airless spray gun 14
Whether to spray the coating material P from No. 1 (spray ON / OF
F) can also be controlled by the control computer (control program). This makes it possible to prevent the waste of the coating material P due to unnecessary ejection by turning off the ejection in a portion where there is no opening pattern (see FIG. 4).

Next, an opening pattern formed by the screen 120 will be described with reference to FIG. As described above (see FIG. 1), the screen 120 is a band-shaped screen, and is substantially annular (substantially cylindrical) by the rim 131.
When set on the rim 131,
The leading edge 120F and the trailing edge 120G shown in FIG. 4 are held by the rim 131 at a slight interval, respectively.
The screen 120 is wound around the rim 131 without loosening. As described above, on the painted surface 10A of the building board 10 in the present embodiment, a pattern in which squares are arranged in a staggered pattern is formed.
Is formed on the screen 120 in advance. Screen 120
Has a length LS slightly larger than the length L of the building board 10 and a width (cylindrical height) WS larger than the width W of the building board 10, as shown in FIG.

Accordingly, if this screen 120 is used, a painted building board 20 is formed on the painted surface 10A of the building board 10 in which the square painted material layers 14 made of the painting material P and arranged in a staggered manner are formed. be able to. In addition, when the transparent protective coating material CL is further coated on the entire surface of the coating surface 10A in order to protect the coating material layer 14 and the coating surface 10A, the weather resistance and the like can be further improved.

(Embodiment 2) Next, a second embodiment will be described. In the above embodiment, the painted surface 10A of the building board 10 to be painted is flat, and the flat painted surface is painted in a staggered quadrilateral. On the other hand, in the present embodiment, the painted surface is made of an uneven brickwork pattern, and the first painted material layer is painted in advance with the color of the brick portion (convex portion) over the entire painted surface, and the joint is used. The difference is that the color of the joint is applied to the portion (recess), and the same coating apparatus 100 is used except for the screen. Therefore, different parts will be mainly described, and similar parts will be omitted or simplified.

First, the building board 20 to be painted in the present embodiment is
Will be described. The building board 20 is an inorganic board similar to that of the first embodiment, and is a rectangular plate having a width W and a length L as shown in a plan view and a cross-sectional view in FIG. Its painted surface 20
In A, a concavo-convex pattern that forms a brick-stacked pattern that resembles a horizontally long brick that is stacked in eight steps in a staggered manner is formed. Of these, the portion corresponding to the brick (hereinafter also referred to as a brick portion) 21 forms a convex portion, while the portion corresponding to the joint between the bricks (hereinafter also referred to as a joint portion) 22 forms a concave portion. A first coating material layer 23 (see FIG. 9) is painted in advance on the painted surface 20A of the building board 20 with a color or pattern similar to the brick surface formed on the brick portion (convex portion) 21 in advance. I have. In the following, the second coating material P having a joint color having a hiding power is applied to joints (recesses) 22 using the building board 20.
Is applied.

Next, the building board coating apparatus 100 according to this embodiment will be described. The coating apparatus 100 whose outline is shown in FIG. 6 has an opening pattern different from that of the screen 120 in the first embodiment only in the screen 220, but is otherwise the same as the roller conveyor 110, the screen circulation moving mechanism 130, the spray mechanism 140, and the cleaning. A mechanism 150 is provided. Therefore, the roller conveyor 110 conveys the building board 20 in the direction of arrow 110A along the conveying surface 112 with the coating surface 20A facing upward in the drawing. The screen 220 is also a belt-shaped stainless steel screen stretched in a substantially cylindrical annular shape by the rim 131, is located above the roller conveyor 110 in the figure, and has an opening pattern described later (see FIG. 8). Also in the present embodiment, a screen 220 having an opening pattern corresponding to one building board 20 is used.

The screen circulation moving mechanism 130 is the same as that of the first embodiment. The building material sensors 133A, 133B, 133C for detecting the position of the building material 20 are provided at predetermined positions when the building material 20 is conveyed. When 20 arrives, it generates signals SGA, SGB, SGC, respectively. The screen sensor 134 also generates a signal SGD when detecting the front end 220F of the screen 220 (see FIG. 8).

The spray mechanism 140 is the same as that of the first embodiment, and the second coating material P fed through the pipe 142 is
It is ejected from the low-pressure airless spray gun 141. As can be easily understood with reference to FIG. 7, a large number of low-pressure airless spray guns 141 are arranged side by side in the direction perpendicular to the sheet of FIG.
, The second coating material P can be ejected in the direction perpendicular to the paper surface in the form of a tab-tailed liquid film PF without any gap. Therefore, when the second coating material P is ejected in the form of the liquid film PF, the building material 20 can be uniformly coated.

As shown in FIG. 6, the dimension WP in the direction (width direction WD) orthogonal to the transport direction 110A of the second coating material P ejected by the many low-pressure airless spray guns 141 is the same as that of the building material 20. The width W is set larger than the width W. Further, the width is smaller than the width WS of the screen 220 indicated by the broken line. Therefore, without changing the arrangement of each low-pressure airless spray gun 141, the screen 22
Building board 1 corresponding to an arbitrary opening pattern
2, a second coating material P can be applied. Further, even if the screen 220 is replaced with another opening pattern, there is no need to change the arrangement of the low-pressure airless spray gun 141.

Further, the cleaning mechanism 150 is the same as that of the first embodiment, and removes the unnecessary coating material PR attached to the screen 220 from the screen 220. Also, the screen 220
The rim 131 is controlled so as to rotate (circulate) in synchronization with the transport of the building board 20, as in the first embodiment.

With the coating apparatus 100, the building board 20 is conveyed by the roller conveyor 110, and rotates (circulates) in synchronization with the screen 2.
According to the 20 opening patterns, the second coating material P is applied. In the present embodiment, as will be described later, the coating is performed using three types of opening patterns to coat all the joint portions 22. Therefore, the screen 220 of the coating device 100 is replaced, or the three coating devices 100 are used. The second coating material P is applied to the building board 20 three times in total. Later,
According to the properties of the second coating material P, if the drying and baking are performed at a predetermined temperature and a predetermined time, the second coating material layer can be formed on the joint 22 of the building board 20. Since the coating apparatus 100 is used, the application of the second coating material P to the building board 20 can be completed in a very short time, and the productivity can be increased. Since the inversion operation is not required, the movement control of the screen 220 is easy.

Next, an opening pattern formed by the screen 220 will be described with reference to FIG. The screen 220 is a band-shaped screen stretched in a substantially annular (substantially cylindrical) shape by the rim 131. When the screen 220 is set on the rim 131, the front end side 220F and the rear end side 220G shown in FIG. Rim 131 at intervals
And the screen 220 is securely
The second coating material P having a joint color is applied to a part of the joint portion (recess) 22. However, in the present embodiment, a stainless plate provided with a predetermined pattern of openings (through holes) is used for the screen 220. Therefore, as will be easily understood, all the joints ( It is not possible to apply the second coating material P to the recess 22). This is because, since the brick portion 21 is surrounded by the joint portions 22, if an opening is provided in a shape corresponding to all the joint portions 22, the portion of the screen corresponding to the brick portion 21 cannot be held.

Therefore, in the present embodiment, FIGS.
By using three types of screens 220X, 220Y, and 220Z having the opening patterns OP1, OP2, and OP3 shown in (c), these are sequentially set in the coating apparatus 100, and the coating is repeated three times by using these. Joint part 1
2 is coated with a second coating material P. Preferably, the three coating apparatuses 100 are connected, and the screens 220X, 220 are connected.
When the 20Y and 220Z are set respectively, it is not necessary to replace the screen 220 (220X to 220Z), and a series of coating can be performed faster, so that productivity can be further improved. The screens 220X to 220Z are shown in FIG.
As shown in (a) to (c), each has a length LS slightly larger than the length L of the building board 10 and a width (cylindrical height) WS larger than the width W of the building board 10.

The first opening pattern OP shown in FIG.
Reference numeral 1 denotes a shape obtained by collecting only portions extending in the width direction (vertical direction in the drawing) of the pattern of the joint portions 12. On the other hand, the second and third opening patterns OP2 and OP3 shown in FIGS. 8B and 8C have a shape obtained by collecting only portions extending in the length direction (left and right directions in the drawing) of the joint 12 pattern. It has been. However, the second opening pattern OP2 (FIG. 8)
(Refer to (b)), the brick portions 11 are arranged in odd-numbered stages (1, 3, 5, 7th stages) counted in the stacking direction (width direction, upper side in the figure).
Among them, the opening pattern is such that joints 12 corresponding to the upper side (upper side) and joints 12 corresponding to the lower side (lower side) are alternately selected in the horizontal direction. On the other hand, the third opening pattern (see FIG. 8 (c)) is the same as the odd-numbered bricks 11, but the joint portion 12 corresponding to the lower portion and the upper portion corresponding to the upper portion, contrary to the second opening pattern. The joint pattern 12 is an opening pattern in which the joints 12 are alternately selected in the horizontal direction. With the three types of opening patterns OP1 to OP3, all the joint portions 12 can be painted. In these patterns, each opening is formed to have a substantially linear shape, and a bent opening shape is avoided, so that a bent portion that is easily deformed can be reduced (eliminated). Further, since the size (length) of the continuous opening is reduced, there is an advantage that the strength of the screen can be easily maintained.

In this manner, as shown in the partially enlarged plan views of FIGS. 9 (a) and 9 (b) and the sectional views thereof, the island-shaped brick portion (convex portion) 21 of the painted surface 20A of the building board 20 is shown. A painted building board 30 in which a second coating material layer 24 made of the second coating material P is applied only to the joints (recesses) 22 around the periphery. Therefore, in the brick portion 21, the first surface is placed on the painted surface 20A.
Only the coating material layer 23 is formed, while, at the joint 22,
A first coating material layer 23 and a second coating material layer 2 on the coating surface 20A;
4 are formed in this order. In this painted building board 30, since the joint portion (recess) 22 is coated with the second coating material P, the second coating material P does not wet and spread to the brick portion 21, so that the first coating material layer 23 Second coating material layer 24
The boundary with the (second coating material P) becomes clearer, and finishes in a more natural tone close to the real bricks and joints, and forms the designability of the painted building board 30 having higher designability than the conventional one. can do. In order to protect the first coating material layer 23 and the second coating material layer 24, as shown by a broken line in FIG. Etc. can be further improved.

(Modification 1) Next, a modification of Embodiment 2 will be described. In the second embodiment, a stainless plate having openings (through holes) OP1 to OP3 according to the opening pattern is used as the screen 220 (220X to 220Z). In the present modification, a predetermined opening pattern OP4 is formed on the stainless mesh. Only in that a screen 230 on which a resist layer (emulsion layer) 231 having Therefore, the different parts are explained,
Descriptions of similar parts are omitted or simplified.
The screen 230 according to this modification has an opening pattern OP4 corresponding to the joint portion (recess) 22 of the building board 20, as shown by hatching in FIG.
The screen 230 is made of a stainless steel mesh, and has a resist layer 231 that closes the openings of the mesh except for the opening pattern OP4. Accordingly, the stainless steel mesh is exposed in the opening pattern OP4, and the second coating material P can pass between the front and back through the mesh. As described above, when the screen is formed by the mesh material, the opening pattern corresponding to the joint portion 22 can be formed by one screen 230. Therefore, as in the second embodiment, a plurality of (three in the above) screens are used. Is formed, and application is not required to be repeated a plurality of times, so that productivity can be further improved.

(Embodiment 3) Next, a third embodiment will be described. In the first and second embodiments, the screens 120 and 220 are stretched in a substantially cylindrical shape, and are rotated and circulated by the rim 131 of the screen circulating and moving mechanism 130. On the other hand, the coating device 3 of the present embodiment
In 00, the screen 320 is not stretched cylindrically and is advanced by a plurality of rollers. Also, the spray mechanism and the cleaning mechanism are different. However, the other parts are almost the same, and therefore, different parts will be mainly described, and description of the same parts will be omitted or simplified. FIG.
The coating apparatus 300 shown in FIG. 1 is for coating the second coating material P on the coating surface 20A of the building board 20 as in the second embodiment. The coating apparatus 300 includes a roller conveyor 110, a screen 320, a screen circulation moving mechanism 330, a spray mechanism 340, a cleaning mechanism 350, and a second coating material ejected from the spray mechanism 340, as in the first embodiment. A shielding mechanism 360 for shielding the P sprayed in an unnecessary direction and recovering the second coating material P is provided.

The roller conveyor 110 is used in the first and second embodiments.
Similarly to the above, it has a number of rollers 11 and transports the building board 10 along the transport surface 112 in the direction of arrow 110A (from left to right in the figure). Meanwhile, the screen 320
Unlike the first and second embodiments, is substantially trapezoidal by six rollers of the screen circulation moving mechanism 330 described below. The screen 320 includes a strip-shaped screen main body 321 made of a fluororesin, and a connecting member 322 that connects the front end side 321F and the rear end side 321G, and has a ring shape as a whole. Screen body 32
Reference numeral 1 denotes the same opening patterns OP1 to OP3 as in the second embodiment.
(See FIG. 8), and the second coating material P is applied by sequentially replacing the three types of screens on which the three types of opening patterns OP1 to OP3 are formed, similarly to the second embodiment. By doing so, the entire joint portion 22 can be applied. As the screen 320, a screen on which an opening pattern corresponding to one building board 20 is formed is used.

The screen circulation moving mechanism 330 is
It is provided with six rollers 331 to 336, and these rollers are driven by a control computer (not shown) to move the screen 320 in the direction of arrow 320S in the figure. The roller 331 and the roller 332 are
And the building board 20 (painted surface 20A) are arranged in the vicinity of the transport surface 112 so as to be in non-contact but substantially parallel. At this time, in consideration of the allowable range of warpage and undulation of the building material 20, it is preferable to keep an interval at a dimension that does not make contact with the screen 320. This is to prevent the screen 320 from being deformed or damaged due to contact with the building material 20. The screen circulation moving mechanism 330 includes, similarly to the first and second embodiments, the building material sensors 133A to 133C for detecting the position of the building board 20, and the screen 32.
A screen sensor 334 for detecting the leading end 320F of the building material is included. Based on the signals SGA to SGC from the building material sensors 133A to 133C, the signal SGD from the screen sensor 334, and the like, the building material by the roller conveyor 110 is controlled by the control computer. 20 and the movement of the screen 320 are synchronized. That is, the transport speed of the building material 20 is made equal to the traveling speed of the screen 320,
Further, the transfer timing of the building material 20 and the screen 320
Of the building material 20 is adjusted.
The building material 20 is transported and adjusted so that the screen 320 advances in a state where the uneven pattern of 0A matches the opening pattern formed on the screen 320.

The spray mechanism 340 is the same as that of the first embodiment.
Unlike this, the second coating material P sent through the pipe 342 is sprayed into a substantially conical shape by the high-pressure airless spray gun 341. Similar to the first and second embodiments, a large number of the airless spray guns 341 are also arranged side by side in the direction perpendicular to the sheet of FIG. 11 (see FIGS. 3 and 7), and cover a wider range than the width W of the building material 10. , 2nd coating material P
Is sprayed on the building material 10 to be surely applied.

The cleaning mechanism 350 includes a tip 351
S having a rubber blade 351 contacting the inner peripheral surface 320A of the screen 320 with the scraped unnecessary coating material P
R is collected and reused through the tray 351 and the collection pipe 351E. In addition, similarly to the first embodiment, an apparatus for cleaning may be provided in addition to the blade 351. Further, the coating device 33 of the present embodiment
At 0, the shield collection mechanism 360 was provided. Embodiment 1, 2
Then, the second coating material P was ejected in the form of the liquid film PF using the low-pressure airless spray gun 141 (FIG. 3,
This is because, in this embodiment, the airless spray gun 341 that sprays the second coating material P in a conical shape is used in the present embodiment. That is, among the second coating materials P ejected from the airless spray gun 341, those other than those that proceed downward in the figure (for example, those that proceed obliquely lower right and lower left in the figure) pass through the opening pattern. Is applied to the building material 20 in an unnecessary pattern, and an unexpected application of the second coating material P results in a defective application pattern or the roller conveyor 1
In some cases, a problem that the ten rollers 110 are soiled may occur. Therefore, shielding plates 361 and 362 having a substantially V-shape are arranged, and are shielded by the shielding plates 361 and 362 except for those of the injected second coating material P that proceed downward in the drawing. In addition,
The second coating material P shielded by the shielding plates 361 and 362 is collected through the collection pipe 363 and reused.

In this embodiment, since the screen 320 is stretched and driven by the roller 331 or the like, the degree of freedom of the shape is high, and the restriction on the provision of the cleaning mechanism 350 and the like is reduced. In addition, since the screen 320 is advanced between the rollers 331 and 332 in parallel with the building board 20, the airless spray gun 341 has a degree of freedom in the arrangement in the left and right direction in the drawing, and has an advantage that the design can be easily performed. is there. In this manner, the coating device 300 can also apply the second coating material P to the joint portions 22 of the building board 20 as in the second embodiment. Further, similarly to the first embodiment, it is also possible to paint on a flat building board 10 having a painted surface 10A.

In the above, the present invention has been described with reference to the respective embodiments. However, the present invention is not limited to the above embodiments, and it can be said that the present invention can be appropriately modified and applied without departing from the gist thereof. Not even. For example, in the first and second embodiments, stainless steel plates are used for the screens 120 and 220, and in the third embodiment, a Teflon sheet is used for the screen main body 321. However, other resin sheets or metal plates may be used. A composite material such as a stainless steel plate coated with a fluororesin may be used. In the first modification,
As the screen 230, a stainless steel mesh provided with a resist layer 231 is used, but a screen formed by meshing another metal wire or a mesh formed by a natural fiber or a synthetic fiber such as silk or polyester fiber may be used.

In the above-described embodiments and the like, the so-called ceramic building plates 10 and 20 are used, but any material may be used as long as it can be painted on the painted surface. In the first embodiment, the flat painted surface 10A of the building board 10 is held.
Although a staggered square pattern is formed in FIG. 1 (see FIG. 1), the present invention is not limited to this, and an arbitrary pattern can be formed according to the opening pattern of the screen. Further, in Embodiments 2 and 3, the unevenness of the brickwork pattern is caused by the painted surface 20A.
Although the building board 20 (see FIG. 5) formed on the surface was used, the pattern of the unevenness formed on the painted surface is not limited to such a brick-layered pattern, but may be a stone-layered pattern or any other shape. But it is good. Further, in the above-mentioned Embodiments 2 and 3, etc., an example in which the concave portion (joint portion) is coated is shown. However, the present invention is not limited to the case where the concave portion is coated. Can also be painted in position.

Further, in Embodiments 2 and 3, etc.
As the second coating material P, a paint of joint color was used, but the color and material of the coating material to be coated on the coating surface are not limited. In addition to the coating material, aggregates such as resin beads, color sand, and anti-friction particles are used. May be sprayed and carried on the painted surface. In this case, it is preferable to apply an uncured adhesive layer capable of carrying the aggregate in advance, and then spray the aggregate. Alternatively, the aggregate may be mixed with a paint or an adhesive, and the mixed coating agent may be applied. Furthermore, in the first, second, and third embodiments, the screens 120, 22
At 0,320, an aperture pattern corresponding to one building board was formed. Therefore, every time one building board was applied, the screen was rotated once (traveled by one revolution).
However, a screen in which a plurality of (for example, three) opening patterns are continuous may be used although the peripheral length of the screen is long. This is because it is easier to secure a space for the cleaning mechanism and the like.
Further, in the above embodiments and the like, in the spray mechanism, the low-pressure airless spray gun 141 and the airless spray gun 341 are used. However, as long as the coating material can be applied to the building material through a screen having an opening pattern. For example, an air spray gun or a flow coater may be used.

[Brief description of the drawings]

FIG. 1A is a plan view and FIG. 1B is a cross-sectional view of a building board according to a first embodiment.

FIG. 2 is an explanatory diagram illustrating an outline of a building board coating apparatus according to the first embodiment.

FIG. 3 is an explanatory view showing a state in which a building board is painted by the painting apparatus shown in FIG. 2;

FIG. 4 is a development view of a screen used in the coating apparatus shown in FIG.

5A is a plan view and FIG. 5B is a cross-sectional view of the building board according to the second embodiment.

FIG. 6 is an explanatory view showing an outline of a building board coating apparatus according to a second embodiment.

FIG. 7 is an explanatory view showing a state in which a building board is painted by the painting apparatus shown in FIG. 6;

FIG. 8 is a developed view of a screen used in the coating apparatus shown in FIG. 6, showing three types of opening patterns.

9 (a) is a partially enlarged plan view and FIG. 9 (b) is a partially enlarged sectional view of a painted building board.

FIG. 10 is a developed view showing an opening pattern of a mesh type screen according to a first modification.

FIG. 11 is an explanatory diagram illustrating an outline of a building board coating apparatus according to a third embodiment.

[Explanation of symbols]

10, 20 Building board 10A, 20A Painted surface 21 Brick portion (convex portion) 22 Joint portion (recessed portion) 14 Coating material layer 23 First coating material layer 24 Second coating material layer 100, 300 Coating device 110 Roller conveyor (conveying means ) 111 roller 120, 220, 220X, 220Y, 220Z, 32
0 screen 130, 330 screen circulation moving mechanism (screen circulation moving means) 131 rim 131G annular gear part 132 gear 133 stepping motor 133A, 133B, 133C building material sensor 134,334 screen sensor P second coating material (coating material) 140, 340 Spray mechanism (coating material coating means) 141 Low pressure airless spray gun 341 Airless spray gun 150, 350 Cleaning mechanism (cleaning means) PR Unnecessary coating material 151, 351 Blade 152 Roll brush OP1, OP2, OP3, OP4 Opening pattern 360 Shielding recovery Mechanism (shielding means) 361, 362 Shielding plate

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) B05D 7/00 B05D 7/00 L E04F 13/08 E04F 13/08 E 21/165 21/165 BF Term (Ref.)

Claims (9)

[Claims] 1. A coating material is applied to the painted surface of the building board through the screen while circulating and moving a substantially annular screen having a predetermined opening pattern formed in synchronization with the transport of the building board. A method of manufacturing a painted building board with a painting process. 2. The method for manufacturing a painted building board according to claim 1, wherein a portion of the screen used for painting the painted material is used again for a later painting after being cleaned. A method for producing a painted building board, characterized in that: 3. The method for manufacturing a painted building board according to claim 1, wherein the painted surface of the building board is formed in a predetermined concavo-convex pattern, and the opening pattern of the screen is as described above. A method for producing a painted building board, characterized in that it is an opening pattern corresponding to the shape of a concave portion or a part of the concave and convex pattern. 4. A building board coating apparatus, comprising: a conveying means for conveying the building board; a screen formed with a predetermined opening pattern and stretched substantially in an annular shape; A building board coating apparatus, comprising: a screen circulation moving means for circulating a screen; and a coating material coating means for coating a coating material on a coating surface of the building board via the moving screen. 5. The building board coating apparatus according to claim 4, wherein the coating material coating means simultaneously applies the coating material over a dimension larger than the dimension of the building board in a direction orthogonal to the direction of the conveyance. An architectural board coating apparatus characterized by being paintable. 6. The building board coating apparatus according to claim 4, further comprising a cleaning means for cleaning a portion of the screen used for coating the coating material. Plate coating equipment. 7. The building board coating apparatus according to claim 4, wherein the coating material coating means travels in an unnecessary direction from the coating material coating means between the coating material coating means and the screen. An architectural plate coating apparatus comprising a shielding means for shielding a coating material. 8. The building board coating apparatus according to claim 4, wherein the opening pattern of the screen is a concave portion of an uneven pattern formed on a painted surface of the building board or one of the concave portions. An architectural board coating apparatus characterized by an opening pattern corresponding to the shape of a part. 9. A coated surface having a predetermined uneven pattern including an island-shaped convex portion and a concave portion surrounding the island-shaped convex portion, a first coating material layer coated on the entire surface of the coated surface, A second painted material layer painted on the first painted material layer.