JP2010063982A - Method of coating building board with paint - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of coating a building board with paint while transferring a building board having an uneven surface and a pair of side faces one equipped with an upper tongue and the other with a lower tongue keeping its surface to face upward, capable of thoroughly coating the surface of the building board, the surface and the side face of the lower tongue, the side face of the building board disposed above the lower tongue, the side face and the reverse side of the upper tongue, and the side face of the building board disposed underneath the upper tongue with paint, leaving none of the faces left uncoated. <P>SOLUTION: The coating method comprising a process of feeding paint into a storage tank to store the same therein, a process of allowing the paint disposed in the storage tank to fall by its own weight from a discharge port like water falling in a waterfall to coat the surface of the building board therewith, a process of allowing the paint applied onto the surface of the building board to overflow in the vertical direction relative to the traveling direction to coat the side face and the reverse side of the upper tongue of the building board, and the side face of the building board disposed underneath the upper tongue with the paint, is characterized in that the amount of the paint present on the surface of the building board immediately after allowing the paint to overflow therefrom is made to be in a range of 1,000-2,000 g/m<SP>2</SP>. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method for coating a building board having irregularities on its surface and having an upper solid part and a lower solid part on its side surface. More specifically, the surface of the building board, the surface and the side of the lower solid part, and the lower solid are conveyed while conveying the building board having irregularities on the surface and having the upper solid part and the lower solid part on the side surface. The present invention relates to a coating method in which a paint is sufficiently applied to a side surface of the building board above the part, a side surface and a back surface of the upper solid part, and a side surface of the building board below the upper solid part without leaving any paint.

In general, in order to improve the appearance of a building board, the surface is often provided with a pattern by unevenness to give a design property. In order to suppress changes in physical properties such as dimensions due to water absorption and to further improve the appearance, it is usual to apply a paint to the surface and side surfaces of the above-mentioned plate with irregularities on the surface. is there.
Moreover, in order to join a building board with another building board distribute | arranged up and down and / or right and left, the side surface of this building board has an upper solid part and a lower real part. FIG. 7 shows an example of a building board. The building board A shown in FIG. 7 has a large number of block-like protrusions A7 protruding on the surface, thereby having irregularities on the surface. The side surface includes a side surface A5, a side surface A6, a side surface having an upper solid portion A1 and a side surface A2, and a side surface having a lower solid portion A3 and a side surface A4. The upper solid part A1 is formed by partially cutting the side surface of the building board A from the back surface side, and since the cutout extends over the entire surface of one side, the upper solid part A1 is formed over the entire surface of one side. ing. Further, the lower solid part A3 is formed by partially cutting a side surface different from the upper solid part A1 of the building board A from the surface side, and the cutout extends over the entire surface of one side surface. A3 is also formed over the entire surface of one side. In addition, the notch of the side surface having the upper solid part A1 is formed larger than the lower solid part A3. Therefore, when constructing the building board A on the outer wall of the building, the upper solid part A1 is fitted with the lower solid part A3 of another building board, and the lower solid part A3 is fitted with the upper solid part A1 of another building board. By making it fit, the some building board A can integrate and can comprise the outer wall of a building.

  As a method of applying the paint to the building board, a brush coating method in which the paint is applied with a brush, a part of the surface of the rotating roll coater is immersed in the paint reservoir, and the paint is applied to the roll surface. A roll coater method in which the coating material is adhered and moved through the roll, a spraying method in which the coating material is blown out from the nozzle at the tip of the spray, and the coating material is overflowed in a film form from the side wall of the paint reservoir. There is a flow coater method in which the paint is passed through.

  The brush coating method is a method in which a brush is placed in a paint reservoir, the paint is attached to the brush, and the surface of the building board to be painted with the brush and the side surface having the real part are stroked and painted. It is difficult to uniformly boil the surface of the building board and the side surface having the real part and to carry the building board while conveying it. In addition, there is a concern that a building board having a large size or a building board having a pattern with unevenness on the surface is more difficult, and there are places where coating is insufficient, which affects the physical properties and appearance of the building board. Further, when the brush is directly applied to the building board, it is easily worn and deformed and needs to be replaced immediately.

  In the roll coater method, the paint adhering to the roll is moved to the portion of the building board that is in contact with the roll, so that it can be carried out while conveying the building board to be coated. Further, in the case of a building board having a smooth surface, the paint moves and sufficient coating is obtained. However, in a building board having a pattern with unevenness on the surface, since the concave part cannot contact the roll, the paint cannot be moved to the concave part, and there are places where the coating is not applied, and the physical properties of the building board There are concerns that affect the appearance. Further, since the side surface having the real part is also uneven, the roll cannot be contacted as a whole, and there is a possibility that a portion where the coating is not applied occurs, which affects the physical properties and appearance of the building board. Furthermore, the surface of the building board and the side surface having the real part cannot be painted at the same time, and when the paint is circulated, fragments of the building board base material are often mixed in the paint. There is also a concern that the debris adheres to the roll and a portion where the coating is not applied may occur. In addition, since the application state of the paint is affected by the viscosity of the paint used, the viscosity of the paint must be managed.

Since the spray method sprays paint on the surface of the building board, it can be carried out while conveying the building board to be painted, and even a building board having a pattern with unevenness on the surface can be painted. However, the amount of paint applied differs between the concave and convex parts, and there are concerns that the paint will not be applied sufficiently on the slopes of uneven surfaces and that paint will accumulate in the concave parts, which may affect the physical properties and appearance of the building board. is there. Also, in order to paint the side of the building board with the real part, there is a method of spraying the paint from the diagonally lower part of the building board toward the real part. There are concerns such as easy clogging. Another method is to turn the building board upside down and spray the paint on the real part, but it requires a step to turn the building board upside down and is inefficient. Depending on the shape of the real part, There is a concern that the paint will not reach the area and there are places where the paint is not applied. Furthermore, when the paint is circulated and used, fragments of the building board base material are often mixed in the paint, and in that case, the fragments cause nozzle clogging at the tip of the spray, and there are places where the paint is not applied. There are also concerns that arise. Patent Document 1 discloses a method of measuring and managing the flow rate of paint supplied to a spray nozzle by a Coriolis flow meter. However, this method only detects defects such as nozzle clogging in the spray quickly and cannot prevent nozzle clogging. In addition, since the spray method is pressurized and sprayed, foam tends to be generated in the paint, and a large amount of antifoaming agent is required. As a side effect, there is a concern that it may adversely affect the moldability of the coating film, When applying the paint, the paint will be repelled, the adhesiveness of the paint will deteriorate, and the paint application will be affected by the viscosity of the paint used. There are also concerns such as not becoming.
JP 2003-1155 A

  The flow coater method can uniformly apply a paint in the case of a building board having a smooth surface. However, when the flow coater method is performed while transporting the building board, the coating is applied to the uneven slope provided on the traveling direction side of the plate with the uneven pattern on the surface. The uneven slope provided on the opposite side to the traveling method is not coated with paint, and there are places where the paint is not applied, which may affect the physical properties and appearance of the building board. Also, in order to paint the side with the real part of the building board, the building board is turned upside down and passed through the film-like paint, but the process of turning the building board upside down is required and the efficiency is poor. Depending on the shape of the real part, there is a concern that the paint does not reach the back of the real part, and there are places where painting is not performed. Furthermore, when the coating material is circulated, bubbles are generated in the coating material, and the film-like coating material is interrupted, and there is a concern that a portion where the coating is not performed may occur. In addition, there are many cases where base material fragments and the like are mixed into the paint, and in this case, there is a concern that the debris clogs the side wall of the paint reservoir and a portion where the coating is not applied may occur.

  The present invention has been made in view of such a situation, and is constructed while conveying a building board having an uneven surface and an upper solid portion and a lower solid portion on a side surface with the surface facing upward. The surface of the board, the surface and side of the lower solid part, the side of the building board above the lower solid part, the side and back of the upper solid part, and the side of the building board below the upper solid part It is an object of the present invention to provide a coating method in which a paint is sufficiently applied without leaving any paint.

In order to achieve the above object, the present invention described in claim 1 includes a transport line that transports a building board with the surface facing upward, a storage tank provided above the transport line, and a lower surface of the storage tank. Using a device provided with a discharge port provided on the surface, the building board having irregularities on the surface and having an upper solid part and a lower solid part on the side surface is conveyed while the surface is directed upward. It is a coating method for coating the surface and side surfaces of the plate, supplying and storing paint to the storage tank, and dropping the paint in the storage tank by its own weight so as to flow down like a waterfall from the discharge port, In the state where the surface of the building board is faced upward, a process of applying a paint to the surface of the building board by passing below the storage tank and a direction of applying the paint applied to the surface of the building board Overflow in the direction perpendicular to the A step of applying the paint to the side surface of the upper solid portion of the board, the back surface of the upper solid portion, and the side surface of the building board below the upper solid portion, and dropping the dead weight from the discharge port. The coating method is characterized in that the amount of the paint on the surface of the building board immediately after applying the paint and overflowing the paint in the direction perpendicular to the traveling direction is 1000 to 2000 g / m ² .
In the present invention, since the building board is conveyed with the surface facing upward, the surface and side surfaces of the building board are coated, so that the production efficiency is good.
Further, in the present invention, the amount of paint applied from the discharge port of the storage tank is such that it overflows in the direction perpendicular to the traveling direction after being applied to the surface of the building board, and immediately after overflowing the building board. Since the amount of the paint on the surface of the surface is 1000 to 2000 g / m ² , the paint can be applied to the entire surface of the building board without being left unpainted even on a building board having unevenness on the surface. The paint penetrates sufficiently and the building board after painting becomes difficult to absorb water. Even when the uneven shape of the surface of the building board is complicated, the paint can be applied to the details, and the paint can penetrate sufficiently. If the amount of the paint on the surface of the building board immediately after overflowing is less than 1000 g / m ² , there is a possibility that unpainted portions may be generated on the unevenness formed on the surface of the building board. Moreover, at most the amount of the paint is from 2000 g / m ² on the surface of the building board immediately after overflow, not significantly effect compared with the case of 2000 g / m ² increases, enormous paint needs Disadvantages such as increased equipment costs.
Further, in the present invention, the paint applied to the surface of the building board is overflowed in the direction perpendicular to the traveling direction while the building board is being conveyed. The overflowed paint is caught in the rear surface of the building part and the side surface of the building board below the upper solid part, and the side of the upper solid part of the building board and the upper solid part without reversing the building board And the side of the building board below the upper solid part can be sufficiently painted. In addition, the surface of the lower part of the building board, the side of the lower part, and the side of the building board above the lower part are sufficiently painted by the paint overflowing to the side having the lower part. You can also In addition, when the surface of the upper solid part is not a part of the surface of the building board, the surface of the upper solid part can be sufficiently coated with the overflowed paint.
Therefore, according to the present invention, the paint can be sufficiently applied to the side face of the building board, the side face and the back face of the upper solid part, and the side face of the building board below the upper solid part without leaving any paint. . Even when the paint is circulated and used, the amount of paint applied is large, so that it is not easily affected by bubbles generated, and the problem that the applied paint is interrupted does not occur. Furthermore, since the paint is dropped by its own weight so as to flow down like a waterfall, it is hardly affected even if debris of the base material is mixed into the paint, and is not easily affected by the viscosity of the paint used. There is also an effect that the energy cost is increased and an energy cost can be kept low.

  According to the coating method of the present invention, while conveying a building board having irregularities on the surface and having an upper solid part and a lower solid part on the side surface with the surface facing upward, Without leaving paint on the surface and side of the real part, the side of the building board above the lower real part, the side and back of the upper real part, and the side of the building board below the upper real part It can be applied sufficiently. In addition, even when the paint is used in a circulating manner, it is not easily affected by the generated bubbles, and the problem that the applied paint is interrupted does not occur. In addition, it is difficult to be affected even if base material debris is mixed in the paint, and it is also less susceptible to the viscosity of the paint used. There is also an effect. Furthermore, the paint can sufficiently penetrate the entire surface of the building board, and there is an effect that a building board that hardly absorbs water can be obtained.

  Hereinafter, with respect to the embodiments of the present invention, an example of equipment for carrying out the present invention will be described first, and then the coating method of the present invention using the equipment will be described.

FIG. 1 is a side sectional view showing an example of equipment for carrying out the coating method of the present invention, and FIG. 2 is a front view of a section taken along line 1-1 ′ of the equipment shown in FIG. It is.
In the facilities shown in FIG. 1 and FIG. 2, the building shown in FIG. 7 having a concavo-convex pattern consisting of convex portions A7 on the surface, and having an upper real part A1 and a lower real part A3 at the ends. The board A is placed on the conveyance line with the surface facing upward, and the building roller A is conveyed in the arrow Y direction on the conveyance line by rotating the conveyance roller H in the arrow X direction. The building board A is 3030 mm long and 463 mm wide, and is transported so that the width on the vertical side with respect to the traveling direction is 463 mm.
A storage tank C for storing the coating material B to be applied is provided above the transport line, and the coating material B to be applied is supplied to the storage tank C as needed. A storage amount management unit J is installed inside the storage tank C. The storage amount management unit J is a sphere having an electrical signal transmission unit, and is usually connected to the ceiling of the storage tank C with a chain and floats on the stored paint B. When suspended from the ceiling, that is, when not floating on the paint B, an electrical signal is transmitted from the electrical signal section, and the line is set to be stopped. This storage amount management unit J prevents the paint B from being applied to the building board A.
A discharge port F is provided on the lower surface of the storage tank C. The width on the vertical side with respect to the traveling direction of the discharge port F is 520 mm, which is larger than the width 463 mm on the vertical side with respect to the traveling direction of the building board A. Further, the discharge port F has a structure in which the width on the side parallel to the traveling direction is adjusted by the discharge port adjusting material E. Specifically, the discharge port adjusting material E can move in the traveling direction, and the width on the parallel side to the traveling direction of the discharge port F is adjusted by adjusting the position of the discharge port adjusting material E. In this equipment, the amount of the paint B that falls by its own weight so as to flow down in a waterfall shape toward the surface of the building board A conveyed from the discharge port F is the paint B on the surface of the building board A immediately after the paint B overflows. The width on the parallel side with respect to the traveling direction of the discharge port F was adjusted so that the amount of γ was 1500 g / m ² .
Below the transport line, there is provided a recovery tank I for recovering excess paint B that has been discharged from the discharge port F but has not been applied to the building board A. The paint B recovered in the recovery tank I is a pump. The water is pumped up and returned to the storage tank C for reuse.
A storage amount adjustment port D is provided inside the storage tank C. The storage amount adjusting port D is provided between the port through which the paint B is supplied and the discharge port F, and is connected to the collection tank I. That is, the storage amount adjustment port D is for discharging the paint B in the storage tank C directly to the recovery tank I, and the discharge capacity of the paint B from the storage amount adjustment port D (discharge amount of the paint B per hour). Is greater than the amount of paint B supplied per hour. Due to the storage amount adjusting port D, a certain amount or more of the paint B is not stored in the storage tank C.

Next, the coating method of the present invention using the equipment shown in FIGS. 1 and 2 will be described.
First, by rotating the transport roller H in the arrow X direction, the building board A is transported on the transport line in the arrow Y direction with the surface facing upward.
On the other hand, the coating material B is supplied and stored in a storage tank C provided above the transport line.
Subsequently, the paint B stored in the storage tank C is dropped by its own weight so as to flow down like a waterfall from the discharge port F provided on the lower surface of the storage tank C. Note that the amount of paint B that falls by its own weight so as to flow down like a waterfall toward the surface of the building board A conveyed from the discharge port F is the amount of the paint B on the surface of the building board A immediately after the paint B overflows. Was adjusted to 1500 g / m ² .
Subsequently, the surface of the building board A is passed by passing the building board A below the discharge port F with the surface facing up, and supplying the paint B falling by its own weight from the discharge port F to the surface of the building board A. Paint B is applied to In addition, the width | variety on the perpendicular | vertical side with respect to the advancing direction of the discharge port F is 520 mm, and is larger than the width | variety 463 mm on the perpendicular | vertical side with respect to the advancing direction of the building board A. The amount of B is so large that the amount of paint B on the surface of building board A immediately after overflowing paint B is 1500 g / m ^2. The entire surface including the convex part A7 of the building board A, the surface and the side surface of the lower solid part A3, and the side surface A4 of the building board A above the lower solid part A3 are sufficiently coated and in the traveling direction. Overflow in the vertical direction, the side of the upper solid part A1 of the building board A, the back of the upper real part A1, the side A2 below the upper real part A1, and the side A4 above the lower real part A3, The surface of lower solid part A3 and the side of lower solid part A3 It can be painted to the minute. That is, the entire surface of the building board A, the surface and side surface of the lower solid part A3, the side surface A4 above the lower solid part A3, the side surface and the back surface of the upper solid part A1, and the side surface A2 below the upper solid part A1. In addition, the coating material B can be sufficiently applied without being left behind.
Further, excess paint B collected in the collection tank I is pumped up and returned to the storage tank C for reuse.

Furthermore, another example of the equipment which implements the coating method of this invention is shown.
FIG. 3 is a side sectional view showing another example of equipment for carrying out the coating method of the present invention, and FIG. 4 is a sectional view taken along line 1-1 ′ of the equipment shown in FIG. It is a front view.
3 and 4 differs from the equipment shown in FIGS. 1 and 2 in that a pair of outlet adjustment materials E are provided on both sides of the outlet F, and the width of the outlet F is Can be adjusted from both sides. Others are the same as the equipment shown in FIG. 1 and FIG. 2, and also in this equipment, the amount of the paint B that falls by its own weight so as to flow down in a waterfall shape toward the surface of the building board A conveyed from the discharge port F is The width on the side parallel to the traveling direction of the outlet F was adjusted so that the amount of the paint B on the surface of the building board A immediately after overflowing the paint B was 1500 g / m ² .

Next, the coating method of the present invention using the equipment shown in FIGS. 3 and 4 will be described.
In the coating method using the equipment shown in FIGS. 3 and 4, as in the coating method using the equipment shown in FIGS. Was transported in the direction of the arrow Y with the surface facing up, the paint B was supplied to and stored in the storage tank C provided above the transfer line, and stored in the storage tank C from the discharge port F While the paint B is dropped by its own weight so as to flow down like a waterfall, the building board A is passed through the lower side of the discharge port F with the surface facing up, and the paint B is falling by its own weight from the discharge port F on the surface of the building board A The coating B is applied to the surface of the building board A and overflowed in the direction perpendicular to the traveling direction, and the side surface of the upper solid part A1 of the building board A and the back surface of the upper solid part A1 Side A2 below the upper real part A1 and lower real part A3 And side surfaces A4 on the upper, and the surface of the Shitami section A3, to fully paint even the sides of Shitami portion A3. Note that the amount of paint B that is dropped by its own weight from the discharge port F is so large that the amount of paint B on the surface of the building board A immediately after overflowing the paint B is 1500 g / m ² . In the painting method using the equipment shown in FIGS. 3 and 4, the paint B collected in the collection tank I is pumped up and returned to the storage tank C for reuse.
In the coating method using the equipment shown in FIGS. 3 and 4 as well as the coating method using the equipment shown in FIGS. 1 and 2, the entire surface of the building board A, the surface of the lower solid part A3, The paint B can be sufficiently applied to the side surface, the side surface A4 above the lower solid portion A3, the side surface and the back surface of the upper solid portion A1, and the side surface A2 below the upper solid portion A1 without leaving any paint.

Furthermore, another example of the equipment which implements the coating method of this invention is shown.
FIG. 5 is a side sectional view showing still another example of equipment for carrying out the coating method of the present invention, and FIG. 6 is a sectional view taken along line 1-1 ′ of the equipment shown in FIG. FIG.
The equipment shown in FIGS. 5 and 6 has a width on the vertical side with respect to the traveling direction of the discharge port F of the equipment shown in FIGS. The amount of the paint B that is changed to the same size as the width and is dropped by its own weight so as to flow down like a waterfall toward the surface of the building board A conveyed from the discharge port F is the building immediately after the paint B is overflowed. The width on the parallel side with respect to the traveling direction of the outlet F was adjusted so that the amount of the coating B on the surface of the plate A was 1800 g / m ² . The rest is the same as the equipment shown in FIGS.

Next, the coating method of the present invention using the equipment shown in FIGS. 5 and 6 will be described.
Also in the coating method using the equipment shown in FIGS. 5 and 6, as in the coating method using the equipment shown in FIGS. 1 and 2, the transport roller H is rotated in the direction of the arrow X, and the building board A Was transported in the direction of the arrow Y with the surface facing up, the paint B was supplied to and stored in the storage tank C provided above the transfer line, and stored in the storage tank C from the discharge port F The paint B is dropped by its own weight so as to flow down like a waterfall, the building board A is passed through the lower side of the discharge port F with the surface facing up, and the paint B that is falling by its own weight from the discharge port F on the surface of the building board A By supplying, the coating material B is applied to the surface of the building board A and overflows in the direction perpendicular to the traveling direction. In this coating method, the width on the vertical side with respect to the traveling direction of the discharge port F is set to the same size as the width on the vertical side with respect to the traveling direction of the building board A, and the equipment shown in FIGS. Although the width of the coating method used is smaller than the width on the vertical side with respect to the traveling direction of the discharge port F, the coating material B is dropped by its own weight so as to flow down like a waterfall toward the surface of the building board A conveyed from the discharge port F. Since the amount of paint B on the surface of building board A immediately after overflowing paint B is 1800 g / m ² , the amount of paint B overflowing in the direction perpendicular to the traveling direction is sufficient. It is. And, by the paint B overflowed in the direction perpendicular to the traveling direction, the side surface of the upper solid part A1 of the building board A, the back surface of the upper real part A1, the side surface A2 below the upper real part A1, and the lower real The side surface A4 above the portion A3, the surface of the lower solid portion A3, and the side surface of the lower solid portion A3 are also sufficiently painted. In the painting method using the equipment shown in FIGS. 5 and 6, the paint B collected in the collection tank I is pumped up and returned to the storage tank C for reuse.
In the coating method using the equipment shown in FIGS. 5 and 6, as in the coating method using the equipment shown in FIGS. 1 and 2, the entire surface of the building board A and the surface of the lower part A3 The paint B can be sufficiently applied to the side surface, the side surface A4 above the lower solid portion A3, the side surface and the back surface of the upper solid portion A1, and the side surface A2 below the upper solid portion A1 without leaving any paint.

Next, using a ceramic siding board that has a brick pattern on the surface and has an upper solid part and a lower real part at the end, the coating method of the present invention is compared with the conventional spray method and the flow coater method. went. First, each of the sealer-coated plates subjected to each coating method using a paint made of an acrylic emulsion resin was prepared. That is, the ceramic method siding plate is subjected to the coating method of the present invention using the apparatus shown in FIGS. 1 and 2, and a sealer coating plate coated by the coating method of the present invention is prepared. A sealer-coated plate coated by a spray method was prepared using a spray method on the plate, and a sealer-coated plate painted by a flow coater method was prepared using a flow coater method on another ceramic siding plate. And the coating state of the surface and side surface of each sealer coating board was confirmed.
Furthermore, the coating material which consists of another acrylic emulsion resin was apply | coated to the surface of each sealer coating board by the same setting, it was made to dry, and each coating board was prepared. And the surface water absorption was measured about each coating board, and the comparison was performed. The surface water absorption is measured by a frame placing method, and a 0.2 × 0.2 m frame is provided on the surface of the coated plate, and the sample is allowed to stand for 24 hours with a certain amount of water in the frame. This is a value obtained by calculating the weight change of the front and rear coated plates according to Equation 1.

The sealer-coated plate subjected to the coating method of the present invention was applied without any unpainted paint on the surface and side surfaces of the sealer-coated plate even immediately after performing the coating method of the present invention. That is, paint is applied to the surface of the sealer coating plate, the surface and side surfaces of the lower solid portion, the side surfaces above the lower solid portion, the side surfaces and the back surface of the upper solid portion, and the side surfaces below the upper solid portion. It was applied without leaving.
Moreover, the surface water absorption of the coating board which performed the coating method was 110 g / m < ² >.

The sealer-coated board that has been subjected to a conventional spraying method has been applied without any paint remaining on the surface of the sealer-coated board even immediately after the spraying method has been applied. The paint was left behind on the side.
Moreover, the surface water absorption of the coating board which performed the spray method was 240 g / m < ² >, and was a result which is easy to absorb water compared with the coating board which performed the coating method of this invention.

In the sealer-coated plate that has been subjected to the conventional flow coater method, immediately after the flow coater method is performed, there is an unpainted surface on the surface of the sealer-coated plate. There was unpainted paint on the lower side.
Moreover, the surface water absorption of the coated board which performed the flow coater method was 530 g / m < ² >, and it was a result that water was able to be sucked considerably compared with the coated board which performed the coating method of this invention.

Although one embodiment of the present invention has been described above, the present invention is not limited thereto, and various modifications can be made within the scope of the invention described in the claims. For example, FIG. 8 shows another building board A ′ having a groove A′8 formed on the surface and thereby having irregularities on the surface, but the coating method of the present invention can also be applied to the building board A ′. The design of the building board having irregularities on the surface is not limited.
In addition, the building board A ′ shown in FIG. 8 has the shape of the upper solid part A′1, the side surface A′2 below the upper solid part A′1, and the lower solid part A′3. 7 different from the shape of the upper solid part A1, side face A2, and lower solid part A3 of the building board A shown in FIG. 7, and another cutout between the upper solid part A'1 and the side face A'2 below it. Although A′9 is formed, the painting method of the present invention is the upper solid part A′1, the side face A′2, the lower solid part A′3, the side face A′4, and the cutout A′9 of the building board A ′. The shape of the side surface in the width direction including the upper solid portion and the lower solid portion formed on the side surface in the width direction is not limited.

  As described above, according to the coating method of the present invention, a building board having irregularities on the surface and having upper and lower solid parts on the side surface is transported with the surface facing upward. The surface of the board, the surface and side of the lower solid part, the side of the building board above the lower solid part, the side and back of the upper solid part, and the side of the building board below the upper solid part It can be applied sufficiently without leaving any paint on. In addition, even when the paint is used in a circulating manner, it is not easily affected by the generated bubbles, and the problem that the applied paint is interrupted does not occur. In addition, it is difficult to be affected even if base material debris is mixed in the paint, and it is also less susceptible to the viscosity of the paint used. There is also an effect. Furthermore, the paint can sufficiently penetrate the entire surface of the building board, and there is an effect that a building board that hardly absorbs water can be obtained.

It is side sectional drawing which showed an example of the equipment which enforces the coating method of this invention. It is the front view which looked at the cross section of the 1-1 'line | wire of the installation shown in FIG. 1 from the advancing direction side. It is side sectional drawing which showed another example of the equipment which enforces the coating method of this invention. It is the front view which looked at the cross section of the 1-1 'line of the installation shown in FIG. 3 from the advancing direction side. It is the sectional side view which showed another example of the equipment which enforces the coating method of this invention. It is the front view which looked at the cross section of the 1-1 'line | wire of the installation shown in FIG. 5 from the advancing direction side. It is the figure which showed an example of the building board. It is the figure which showed another example of the building board.

Explanation of symbols

A Building board with irregularities on the surface A1 Upper solid part A2 Side face A3 Lower solid part A4 Side face A5 Side face A6 Side face A7 Convex part B Paint C Storage tank D Storage amount adjustment port E Discharge port adjustment material F Discharge port H Conveyance roller I Recovery Tank J Storage Management Department

Claims (1)

Using a device having a transport line for transporting the building board with the surface facing upward, a storage tank provided above the transport line, and a discharge port provided on the lower surface of the storage tank, the surface is uneven. And a building board having an upper solid part and a lower solid part on the side surface, while conveying the surface upward, while coating the surface and side surface of the building board,
Supplying and storing paint in the storage tank;
A process of dropping the paint of the storage tank by its own weight so as to flow down like a waterfall from the discharge port;
A step of passing the lower side of the storage tank with the surface facing up, and applying a paint to the surface of the building board;
The paint applied to the surface of the building board is overflowed in a direction perpendicular to the traveling direction, and the side surface of the upper solid part of the building board, the back surface of the upper solid part, and the lower part of the upper solid part Applying the paint to the side surface of the building board,
The coating material dropped by its own weight from the discharge port is applied, and the amount of the coating material on the surface of the building board immediately after overflowing the coating material in the direction perpendicular to the traveling direction is 1000 to 2000 g / m ^2. The painting method.

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