JPH1094750A - How to paint building boards - Google Patents

Abstract

(57) [Summary] [Problem] To provide a method of coating a required pattern on a building board surface. SOLUTION: When forming a pattern by painting on the surface of a building board 2 while conveying the building board 2 having irregularities on the surface by a conveyor 1, pattern data to be formed is input to a programmable controller 7, and the building board is constructed. The position of the board is detected by the sensor 5 and the signal is transferred to the signal detection controller 6. The output signal of the signal detection controller activates the dispenser valve opening / closing controller 8 via the programmable controller 7 to control the width direction on the conveyor. The amount of paint discharged from each of the dispensers 3 arranged at a predetermined pitch in the traveling direction is controlled so that the paint adheres to the surface of the building board 2 in a required pattern pattern. 2. A method for painting a building board, wherein the paint on the top is leveled.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for coating a building board capable of forming a coating pattern with a variety of required changes on a building board having irregularities on its surface.

[0002]

2. Description of the Related Art Conventionally, when a paint pattern is formed on a surface of an architectural board having irregularities on a surface composed of calcium silicate board, cement board, wood chip cement board, etc., spray coating,
Flow coater coating and roll coater coating were performed. However, with the above-mentioned painting method, the pattern of the building board formed becomes simple, and it is difficult to form a painted pattern having a texture close to the texture of the brick surface or the texture of the stone material surface, and it is difficult to obtain aesthetically pleasing design. It had become a building board lacking.

In order to solve the above-mentioned problem, for example, a coating method for a building board in which a desired paint pattern is formed by ejecting ink from a large number of jet nozzles as disclosed in Japanese Patent Laid-Open No. 6-155729. Has been proposed.

According to the coating method disclosed in the above publication, a pattern is painted on the surface of a building board while being conveyed by a conveyor. In the method, pattern data of a pattern corresponding to a pattern to be painted is stored in a computer in advance. Let
The control of the ink jet from the jet nozzles arranged in parallel with the coating head arranged on the conveyor in the width direction of the conveyor is performed by a valve control device based on a control signal of the computer, and the pattern to be coated is formed by the jet nozzle. Is applied to the surface of the building board by jetting ink from the surface.

[0005]

However, the ink jet type coating method using a jet nozzle disclosed in the above publication has the following problems. (1) Since the amount of ink ejected from the jet nozzle is small, a large number of jet nozzles are required to coat a large building board, and the apparatus is complicated. (2) The ink jet method using a jet nozzle was originally developed for printers, and is not suitable for painting large materials such as building boards, and equipment costs are high. Was also expensive. (3) Due to the complexity of the device, if a trouble occurs during the painting operation, it takes a long time for maintenance. (4) Since a coating film is formed by the jetting force of the jet nozzle, there is a problem in peeling resistance.

[0006]

According to the present invention, as a means for coating a building board having irregularities on its surface, instead of a jet nozzle, a paint is discharged by a dispenser and adhered to the building board surface, followed by a roll coater treatment. This solves the above problems (1) to (4).

That is, according to the present invention, when building patterns 2 having irregularities on the surface are conveyed by the conveyor 1 and a pattern is formed on the surface of the building board by painting, pattern pattern data to be formed is input to the programmable controller 7. In advance, the position of the building board 2 being conveyed on the conveyor 1 is detected by the sensor 5 and the signal is transferred to the signal detection controller 6, and the output signal of the signal detection controller 6 is sent to the dispenser via the programmable controller 7. The valve opening / closing controller 8 is operated to control the amount of paint discharged from each of a number of dispensers 3 arranged at a predetermined pitch in the width direction and the traveling direction on the conveyor 1 to control a required pattern pattern on the surface of the building board 2. To apply the paint, and then the building board 2 with the roll coater 9 A method of coating a building board, characterized in that the leveling paint.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1, 2, 3 and 4. FIG.

In FIG. 1, reference numeral 1 denotes a conveyor for transporting a building board 2. Above the conveyor 1, a dispenser (a commercially available electromagnetically operated dispensing valve) 3 for discharging paint is provided in the width direction of the conveyor. Many are arranged at predetermined intervals, and many are arranged in a plurality of rows in parallel in the traveling direction of the conveyor.

Each dispenser 3 is connected to a paint tank 4 containing paint by a tube 17, and the paint tank 4 is provided with a pressure regulating valve 4a and a regulator 4b so as to apply a predetermined pressure. .

Reference numeral 5 denotes a sensor for detecting the building board 2 being conveyed by the conveyor 1, and transmits a control signal to the signal detection controller 6 when the building board 2 is detected.

7 is a programmable controller.
Here, pattern pattern data D to be formed by painting
Is input in advance.

Reference numeral 8 denotes an electromagnetic valve 1 of each dispenser 3.
6 is a dispenser valve opening / closing controller for controlling the opening / closing of No.6.

Reference numeral 9 denotes a roll coater for spreading and leveling the paint T discharged from the dispenser 3 and adhered to the surface of the building board 2 in a required pattern.

The roll coater 9 is, as shown in FIG.
It comprises a coating roll 10, a thinner roll 11, for removing paint adhering to the surface of the coating roll 10, a thinner nozzle 12, and a doctor 13. These are attached to a well-known roll coater 9.

The coating roll 10 of the roll coater 9 used here has a hardness of 40 to 50 and a diameter of 155 m, which rolls while conforming to irregularities of about 1 to 5 mm when pressed against a building board.
This is an EPR or EPDM roll having a length of 1100 mm.

As shown in FIG. 3, the paint on the coating roll 10 is wiped off by the thinner roll 11, and the paint remaining on the roll surface is further scraped off by the doctor 13 again. The next paint will not be affected by the paint.

The dispenser 3, as shown in FIG.
Needles 15 are provided at the lower and outlet ports of the electromagnetic valve 16, and the tip of a tube 17 communicating with the paint tank 4 is connected to the upper inlet port, so that the opening and closing of the electromagnetic valve 16 is controlled. As a result, the paint in the fuel tank 4 is dispensed through the tube 17 through the dispenser 3.
Can be ejected from the needle 15 in various ejection patterns such as drip, multipoint ejection, and linear application.

Accordingly, by disposing the tip of the needle of the dispenser 3 with a gap of 5 to 30 mm provided between the needle tip of the dispenser 3 and the surface of the building board 2 to be transported on the conveyor 1, it is possible to reduce the viscosity from low (about 50 cp). A wide variety of paints up to high viscosity (about 500 cp) can be applied in various forms by controlling the discharge pressure and time or selecting the tip needle.

In the present invention, the width is 455 mm and the length is 30
The surface of a building board 2 made of a fiber-mixed calcium silicate board having a depth of 30 mm, a width of 10 mm in the longitudinal direction, five deep grooves of 4 mm in depth, and a surface having a ridge pattern of about 1 mm in depth. In order to form a pattern by painting, 30 dispensers 3 are arranged at intervals of 30 mm in the width direction as shown in FIG. 1 and, at a pitch of 50 mm, as shown in FIG. Arranged in columns.

The inner diameter of each dispenser 3 is 0.5 mm
Of the building board 2, which was previously primed with a commercially available urethane-based brown paint,
It was transported on conveyor 1 at 0 m / min.

When the building board 2 passes beside the sensor 5 and is located below the dispenser 3, the pattern pattern data D previously input to the programmable controller 7
Based on the dispenser valve opening and closing controller 8
Control the degree of opening and closing of the electromagnetic valve 16 of each dispenser 3 by discharging the urethane-based dark gray paint (viscosity 100 cp) from the tip of the needle 15 to form a required pattern pattern on the surface of the building board 2. And attached.

The above-mentioned paint is not limited to urethane, and various paints such as acrylic, silicon, fluorine and inorganic paints used for building boards can be used, and the color becomes dark gray. It is not limited,
A dark color such as black gray or dark brown can be used.

In this state, as shown in FIG. 3 and FIG. 4, the paint T adheres to the uneven boarder portion on the surface of the building board 2 in a state where the paint T rises in a dotted or linear manner. No spread in the width direction was obtained.

Subsequently, the upper surface of the building board 2 is spread by the coating roll 10 of the roll coater 9 so that the paint T adhering to the surface of the building board 2 is leveled as shown in FIG. Spread.

On the surface of the obtained building board, a worn brick-like paint pattern was formed by visual observation.

When the paint T to be filled in the dispensers 3 arranged in a number of width directions is guided from one paint tank 4 to the dispenser via the tube 17 as shown in FIG. The paint discharged from the dispenser 3 is the same color, but when a multicolor pattern is formed, another paint tank (not shown) is arranged in the second and third rows arranged in the traveling direction. If a color paint is filled, an arbitrary color can be applied by a combination of these color paints.

As shown in FIG. 3, one roll coater 9 may be provided at the end of the coating process. However, each of the dispensers 3 in the first row or the second row arranged in the traveling direction may be used. May be provided in the back, and when a plurality of roll coaters 9 are provided, the spreadability of the paint is improved,
In addition, a coating film can be reliably and firmly formed on the surface of the building board 2.

The maximum depth of the unevenness on the surface of the building board is 5 mm.
If it is a building board up to the extent, it can be coated with the roll coater 9, but if the depth of the surface unevenness exceeds 5 mm, the urethane roll having a hardness of about 10 is used to obtain the highest surface unevenness. The paint can be applied substantially uniformly over the entire uneven portion of the surface of the building board up to a depth of about 10 mm.

[0030]

According to the present invention, since a dispenser is used instead of a jet nozzle method to form a paint pattern on the surface of a building board, a wide variety of paints from low to high viscosity can be used. It can be discharged in a form, and the paint that is discharged by the dispenser and adheres in a state of being raised on the building board surface is leveled by applying pressure with a roll coater, so that the brick surface It is possible to form a painted pattern having a texture similar to the texture of the surface of a stone such as granite and valley stone, as well as to improve the peel resistance of the coating film.

Further, since a large number of dispensers are provided in parallel and in the front-rear direction above the conveyor, a desired variety of paint patterns can be efficiently formed during the transfer of the building board.

Therefore, it can be said that the industrial applicability of the present invention is very large.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing an embodiment of the method of the present invention.

FIG. 2 is a schematic side view showing one embodiment of the method of the present invention.

FIG. 3 is a schematic side view of a main part showing an embodiment of the method of the present invention.

FIG. 4 is a schematic plan view of a main part showing one embodiment of the method of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Conveyor 2 Building board 3 Dispenser 4 Paint tank 5 Sensor 6 Signal detection controller 7 Programmable controller 8 Valve opening and closing controller 9 Roll coater 10 Coating roll 11 Thinner roll 12 Thinner nozzle 13 Doctor 15 Needle 16 Electromagnetic valve 17 Tube T Paint

Claims (1)

[Claims] When forming a pattern by painting on the surface of a building board while conveying the building board having irregularities on the surface by a conveyor, pattern pattern data to be formed is input to a programmable controller. The position of the building board 2 being conveyed on the conveyor 1 is detected by the sensor 5 and the signal is transferred to the signal detection controller 6,
The dispenser valve opening / closing controller 8 is operated by the output signal of the signal detection controller 6 via the programmable controller 7, and the paint discharged from each of the dispensers 3 arranged at a predetermined pitch in the width direction and the traveling direction on the conveyor 1. A coating method for a building board, characterized in that a paint is adhered to the surface of the building board 2 in a required pattern by controlling the discharge amount, and the paint on the building board 2 is subsequently leveled by a roll coater 9.