JP2010036098A - Coating method of construction plate - Google Patents

Coating method of construction plate Download PDF

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JP2010036098A
JP2010036098A JP2008201308A JP2008201308A JP2010036098A JP 2010036098 A JP2010036098 A JP 2010036098A JP 2008201308 A JP2008201308 A JP 2008201308A JP 2008201308 A JP2008201308 A JP 2008201308A JP 2010036098 A JP2010036098 A JP 2010036098A
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building board
paint
air
liquid film
coating
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JP5043772B2 (en
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Mamoru Murase
守 村瀬
Yoshinori Hibino
芳則 日比野
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Nichiha Corp
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Nichiha Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a coating method that sufficiently coats an entire surface of a construction plate without any portions left uncoated while conveying the construction plate even if it has irregularities on its surface. <P>SOLUTION: The coating method includes: a step of applying a paint onto the surface of the construction plate while conveying the construction plate with its surface upward; a step of forming a coating liquid film by removing an excessive paint applied over the surface of the construction plate; and a step of spraying air onto the paint liquid film on the surface of the construction plate to pressurize the paint liquid film. The step of spraying the air onto the paint liquid film on the surface of the construction plate is performed, after the step of removing the excessive paint applied over the surface of the construction plate, by spraying the air from an air spraying port while the surface of the construction plate is covered with the air spraying port which is wider than the construction plate. During the time between the step of removing the excessive paint applied over the surface of the construction plate and the step of spraying the air onto the paint liquid film on the surface of the construction plate, the surface of the construction plate is kept under a pressure larger than the atmospheric pressure. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、建築板の塗装方法に関するものである。より詳しくは、建築板を搬送しながら、該建築板の表面全体に塗料を塗り残しなく十分に塗布する塗装方法に関するものである。   The present invention relates to a method for painting a building board. More specifically, the present invention relates to a coating method in which a building board is conveyed and applied to the entire surface of the building board without being left unpainted.

一般に、建築板には、外観を向上させるために、表面に凹凸による模様が施され、意匠性を持たせることが多い。そして、上記表面に凹凸による模様が施された板には、水の吸収による寸法などの物性の変化を抑えるためや、外観を更に向上させるために、表面に塗料を施すことが通常である。   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 of the plate having a pattern with irregularities on the surface.

上記建築板に塗料を施す方法としては、塗料を付着させた刷毛で撫でて塗装する刷毛塗り方法、回転しているロールコーターの表面の一部を塗料溜の中に漬けてロール表面に塗料を付着させ、ロールを介して塗料を移動させるロールコーター方法、スプレーの先端のノズルから塗料を吹き出させて塗装するスプレー方法、塗料溜の側壁から塗料を膜状に流下させて、該膜状の塗料の中を通過させて塗装するフローコーター方法などがある。   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 flowed down from the side wall of the coating material reservoir into a film shape. There is a flow coater method in which the paint is passed through.

上記刷毛塗り方法は、刷毛を塗料溜に入れて刷毛に塗料を付着させ、該刷毛で塗装を施す建築板の表面を撫でて塗装する方法であり、該刷毛で該建築板の表面を均一に撫でること、及び、該建築板を搬送しながら行うことは難しい。また、サイズの大きい建築板や、表面に凹凸による模様が施された建築板では更に難しく、塗装が不十分な箇所が発生し、建築板の物性や外観に影響を及ぼす懸念がある。また、刷毛を建築板に直接当てると摩耗が激しいので変形しやすく、直ぐに交換が必要である。   The above-mentioned 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 coated with the brush is boiled and applied, and the surface of the building board is uniformly applied with the brush. It is difficult to boil and transport the building board. 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. In addition, when the brush is directly applied to the building board, it is easily worn and deformed and needs to be replaced immediately.

ロールコーター方法は、ロールに付着した塗料を、建築板のロールに接した部分に移動させるので、塗装を施す建築板を搬送しながら行うことは可能である。また、表面が平滑な建築板の場合には塗料が移動し、十分な塗装が得られる。しかし、表面に凹凸による模様が施された建築板では、凹部がロールに接することができないので、凹部に塗料を移動させることができず、塗装が施されない箇所が発生し、該建築板の物性や外観に影響を及ぼす懸念がある。また、塗料を循環させて使用した場合、塗料に建築板基材の破片などが混入することが多く、その場合には、該破片がロールに付着し、塗装が施されない箇所が発生する懸念もある。また、使用する塗料の粘性により塗料の塗着状態が影響を受けるので、塗料の粘性を管理しなければならない。   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. In addition, when the paint is circulated and used, there are many cases where a piece of building board base material is mixed into the paint, and in that case, there is a concern that the piece will adhere to the roll and a part where the coating is not applied may occur. is there. 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.

スプレー方法は、塗料を建築板の表面に吹き付けるので、塗装を施す建築板を搬送しながら行うことは可能であり、表面に凹凸による模様が施された建築板でも塗装ができる。しかし、凹部と凸部では塗料の塗布量が異なり、凹凸の斜面には塗料が十分に塗布されない、凹部に塗料が溜まるなどの問題が発生し、建築板の物性や外観に影響を及ぼす懸念がある。また、塗料を循環させて使用した場合、塗料に建築板基材の破片などが混入することが多く、その場合には、該破片がスプレーの先端のノズル詰まりを起こし、塗装が施されない箇所が発生する懸念もある。   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, when the paint is circulated and used, fragments of building board base materials 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 painting is not performed. There are also concerns that arise.

フローコーター方法は、表面が平滑な建築板の場合には塗料を均一に塗布できる。しかし、フローコーター方法では、表面に凹凸による模様が施された建築板では、搬送の進行方向側に設けられた凹凸の斜面には塗料が塗布されるが、搬送の進行方法とは逆側に設けられた凹凸の斜面には塗料が塗布されず、塗装が施されない箇所が発生し、建築板の物性や外観に影響を及ぼす懸念がある。また、塗料を循環させて使用した場合、塗料に泡が発生し、膜状の塗料が途切れ、塗装が施されない箇所が発生する懸念もある。更に、塗料に基材の破片などが混入することが多く、その場合には、該破片が塗料溜の側壁を詰まらせ、塗装が施されない箇所が発生する懸念もある。   The flow coater method can uniformly apply a paint in the case of a building board having a smooth surface. However, in the flow coater method, paint is applied to the uneven slope provided on the traveling direction side of the building board with a pattern with unevenness on the surface, but on the opposite side to the traveling method. There is a concern that the coating surface is not applied to the uneven slope provided, and a portion where the coating is not applied occurs, which affects the physical properties and appearance of the building board. Further, when the paint is circulated, bubbles are generated in the paint, the film-like paint is interrupted, and there is a concern that a part where the paint is not applied is generated. 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.

上記懸念を解決するため、多量の塗料を建築板の表面に塗布する方法があるが、塗料を多量に塗布すると、塗料液膜に泡が発生する、表面の凹部に塗料が溜まるなどの別の懸念が発生する。表面の凹部に塗料が溜まると、乾燥工程において発泡や塗膜ムラなどが発生し、製品の品質や外観が低下する。この解決法として、特許文献１には、塗装面にフローコーターを行った後、該塗装面の移動方向の後方からエアーを吹き付ける方法が開示されている。しかし、該方法では塗料液膜に発生した泡は解決するが、表面の凹部に塗料が溜まる恐れは解決されない。
特開平１０−２０２１５８号公報 In order to solve the above-mentioned concerns, there is a method of applying a large amount of paint to the surface of the building board. Concerns arise. When the coating material accumulates in the recesses on the surface, foaming or coating unevenness occurs in the drying process, which deteriorates the quality and appearance of the product. As a solution to this problem, Patent Document 1 discloses a method in which air is blown from the rear in the moving direction of the painted surface after a flow coater is applied to the painted surface. However, this method solves the bubbles generated in the coating liquid film, but does not solve the possibility that the coating will accumulate in the recesses on the surface.
JP-A-10-202158

本発明は、かかる現情に鑑みてなされたものであり、表面に凹凸を有する建築板であっても、搬送しながら、該建築板の表面全体に塗料を塗り残しなく十分に塗布する塗装方法を提供することを目的としている。   The present invention has been made in view of the current situation, and even a building board having irregularities on the surface, a coating method for sufficiently applying the paint without leaving unpainted on the entire surface of the building board while being conveyed The purpose is to provide.

上記目的を達成するために、本請求項１に記載の発明は、建築板の表面を上側にして搬送しながら塗装を施す塗装方法であって、上記建築板の表面に塗料を塗布する工程と、上記建築板の表面に塗布された過剰分の塗料を除去し、塗料液膜を形成する工程と、上記建築板の表面の塗料液膜に空気を吹き付けて、該塗料液膜を加圧する工程とを有し、上記建築板の表面の塗料液膜に空気を吹き付ける工程は、該建築板の表面が、該建築板の横幅よりも広い横幅の空気吹き出し口に覆われた状態で、該空気吹き出し口から空気を吹き出すことにより行い、上記建築板の表面に塗布された過剰分の塗料を除去する工程の後に、該建築板の表面の塗料液膜に空気を吹き付ける工程を行い、上記建築板の表面に塗布された過剰分の塗料を除去する工程から該建築板の表面の塗料液膜に空気を吹き付ける工程までの間、該建築板の表面に大気圧以上の圧力がかかっている状態とすることを特徴とする建築板の塗装方法である。
塗料を塗布する工程は、スプレー方法及び／又はフローコーター方法、自重落下により塗料を塗布する方法などからなり、建築板の表面に過剰の塗料を塗布する。塗布量としては、塗料を表面全体に塗り残し無く塗布するため、５０〜２００ｇ／尺２とすることが好ましい。建築板の表面に塗布された過剰分の塗料を除去する工程は、高圧のエアーを吹き付けるエアーナイフによる方法及び／又はロールコーターなどによる掻き取り方法などからなる。
本発明において、建築板の表面に塗料を過剰に塗布し、その後に過剰分の塗料を除去するので、該建築板の表面に塗料を塗り残し無く十分に塗布するとともに、該建築板の表面に形成される塗料液膜の厚さを均一化することができる。また、該建築板の表面の塗料液膜に空気を吹き付けるとともに、該建築板の表面の過剰分の塗料を除去する工程から該建築板の表面の塗料液膜に空気を吹き付ける工程までの間、該建築板の表面に大気圧以上の圧力がかかっている状態とするので、塗料は該建築板の表面内部方向へ押圧されることとなり、該建築板の表面にある微細な凹凸を埋めるので、該建築板の表面に形成された塗料液膜の厚さを更に均一にするとともに、該建築板への塗料の密着が改善される。更に、空気吹き出し口は該建築板の横幅よりも広い横幅を有するとともに、該建築板の表面を覆った状態で空気を吹き付けるので、該建築板の表面に確実に空気を吹き付けることができる。更に、該空気吹き出し口は、該建築板の表面の過剰分の塗料を除去する工程の後にあり、該建築板の表面を覆っているので、該建築板の表面の過剰分の塗料を除去する工程において塗料が飛散しやすいが、該空気吹き出し口により、該建築板の表面に飛散した塗料が付着することを防ぐことができる。 In order to achieve the above-mentioned object, the invention according to claim 1 is a coating method in which coating is performed while transporting with the surface of the building board facing upward, and a step of applying a paint to the surface of the building board; Removing excess paint applied to the surface of the building board to form a coating liquid film; and blowing air to the coating liquid film on the surface of the building board to pressurize the coating liquid film And the step of blowing air onto the coating liquid film on the surface of the building board includes the air in a state where the surface of the building board is covered with an air outlet having a width wider than the width of the building board. Blowing air from the blowout port, and after removing the excess paint applied to the surface of the building board, performing a step of blowing air to the coating liquid film on the surface of the building board, The process of removing excess paint applied to the surface of Until step of blowing air into the coating liquid film on the surface of the building board, a method for coating a building board, characterized in that one is a pressure above atmospheric pressure on the surface of the building board is taking.
The step of applying a paint includes a spray method and / or a flow coater method, a method of applying a paint by falling under its own weight, and the like, and an excessive paint is applied to the surface of the building board. The coating amount is preferably 50 to 200 g / scale 2 in order to apply the coating without leaving any paint on the entire surface. The process of removing the excess paint applied to the surface of the building board includes a method using an air knife that blows high-pressure air and / or a scraping method using a roll coater.
In the present invention, the paint is excessively applied to the surface of the building board, and then the excess paint is removed, so that the paint is sufficiently applied without leaving any paint on the surface of the building board, and is applied to the surface of the building board. The thickness of the coating liquid film to be formed can be made uniform. In addition, while blowing air to the paint liquid film on the surface of the building board, from the process of removing excess paint on the surface of the building board to the process of blowing air to the paint liquid film on the surface of the building board, Since the surface of the building board is in a state where a pressure higher than the atmospheric pressure is applied, the paint will be pressed in the direction of the surface of the building board and fill the fine irregularities on the surface of the building board. The thickness of the coating liquid film formed on the surface of the building board is made more uniform, and the adhesion of the coating material to the building board is improved. Furthermore, since the air outlet has a width that is greater than the width of the building board and air is blown in a state of covering the surface of the building board, air can be reliably blown onto the surface of the building board. Further, since the air outlet is after the step of removing the excess paint on the surface of the building board and covers the surface of the building board, the excess paint on the surface of the building board is removed. Although the paint is likely to scatter in the process, it is possible to prevent the scattered paint from adhering to the surface of the building board by the air outlet.

本請求項２に記載の発明は、請求項１に記載の塗装方法であって、前記建築板の表面の塗料液膜に空気を吹き付ける工程は、更に、該建築板の側面が前記空気吹き出し口に覆われた状態で、前記空気吹き出し口から空気を吹き出すことにより行うことを特徴とする建築板の塗装方法である。
本発明において、空気吹き出し口が建築板の表面と側面を覆った状態で空気を吹き付けるので、該建築板の表面と側面に確実に空気を吹き付けることができる。更に、該空気吹き出し口は、該建築板の表面の過剰分の塗料を除去する工程の後にあり、該建築板の表面と側面にあるので、該建築板の表面の過剰分の塗料を除去する工程において塗料が飛散しやすいが、該空気吹き出し口により、該建築板の表面と側面に飛散した塗料が付着することを防ぐことができる。 Invention of Claim 2 is the coating method of Claim 1, Comprising: The process which sprays air on the coating-material liquid film of the surface of the said building board is further the side surface of this building board is the said air blower outlet It is a method of painting a building board, which is performed by blowing air out of the air outlet in a state covered with water.
In the present invention, since air is blown in a state where the air outlet covers the surface and the side surface of the building board, air can be reliably blown to the surface and side surface of the building board. Furthermore, since the air outlet is after the step of removing excess paint on the surface of the building board and is on the surface and side of the building board, it removes excess paint on the surface of the building board. Although the paint is likely to be scattered in the process, the air blowout port can prevent the paint that has been scattered from adhering to the surface and side surfaces of the building board.

本請求項３に記載の発明は、請求項１又は請求項２に記載の塗装方法であって、前記建築板の表面の塗料液膜に空気を吹き付ける工程は、更に、整流板により空気を整流し、前記空気吹き出し口から空気を吹き出すことにより行うことを特徴とする建築板の塗装方法である。
本発明において、整流板により空気を整流して空気吹き出し口から建築板の表面の塗料液膜に空気を吹き付けるので、該建築板の表面全体に確実に空気を吹き付けることができる。 Invention of Claim 3 is the coating method of Claim 1 or Claim 2, Comprising: The process of spraying air on the coating-material liquid film of the surface of the said building board further rectifies | swells air with a baffle plate And it is the coating method of the building board characterized by performing by blowing off air from the said air blowing outlet.
In the present invention, air is rectified by the rectifying plate and air is blown from the air outlet to the paint liquid film on the surface of the building board, so that air can be reliably blown over the entire surface of the building board.

本請求項４に記載の発明は、請求項１〜３のいずれかに記載の塗装方法であって、更に、前記建築板の裏面を減圧する工程を有し、前記建築板の表面の塗料液膜に空気を吹き付ける工程を行いながら、該建築板の裏面を減圧する工程を行うことを特徴とする建築板の塗装方法である。
建築板の裏面を減圧する工程は、建築板の搬送ラインにおいて、下方の空気を吸い込むことにより行う。
本発明において、建築板の表面の塗料に空気を吹き付けるとともに、該建築板の裏面が減圧されるので、塗料は該建築板の表面内部方向へ押圧されるとともに裏面側へ引っ張られるので、該建築板の表面にある微細な凹凸を更に埋めやすくなり、該建築板の表面に形成された塗料液膜の厚さを更に均一にするとともに、該建築板への塗料の密着が更に改善される。 Invention of Claim 4 is the coating method in any one of Claims 1-3, Comprising: Furthermore, it has the process of pressure-reducing the back surface of the said building board, The coating liquid of the surface of the said building board It is a coating method of a building board which performs the process of decompressing the back surface of this building board, performing the process of blowing air on a film.
The process of decompressing the back surface of the building board is performed by sucking the lower air in the building board conveyance line.
In the present invention, air is blown onto the paint on the surface of the building board, and the back surface of the building board is decompressed, so that the paint is pressed toward the inside of the surface of the building board and pulled toward the back side. It becomes easier to fill the fine irregularities on the surface of the board, the thickness of the coating liquid film formed on the surface of the building board is made more uniform, and the adhesion of the paint to the building board is further improved.

本請求項５に記載の発明は、請求項４に記載の塗装方法であって、前記建築板の表面の塗料液膜に空気を吹き付ける工程は、該建築板の裏面を減圧する工程より長く行われることを特徴とする建築板の塗装方法である。
前述したとおり、建築板の表面の塗料液膜に空気を吹き付ける工程は、該建築板の表面が、該建築板の横幅よりも広い横幅の空気吹き出し口に覆われた状態で、該空気吹き出し口から空気を吹き出すことにより行う。本発明において、建築板の表面の塗料液膜に空気を吹き付ける工程は、該建築板の裏面を減圧する工程より長く行われるので、該建築板の裏面を減圧する工程は、該空気吹き出し口により上方が覆われた状態で行うこととなり、減圧する際の空気の吸い込みが安定する。 The invention according to claim 5 is the coating method according to claim 4, wherein the step of blowing air to the coating liquid film on the surface of the building board is performed longer than the step of depressurizing the back surface of the building board. This is a method for painting a building board.
As described above, the step of spraying air on the coating liquid film on the surface of the building board is performed in the state where the surface of the building board is covered with an air outlet having a width wider than the width of the building board. This is done by blowing air from. In the present invention, the step of blowing air to the paint liquid film on the surface of the building board is performed longer than the step of depressurizing the back surface of the building board. Therefore, the step of depressurizing the back surface of the building board is performed by the air outlet. It is performed in a state where the upper part is covered, and the suction of air when decompressing is stabilized.

本発明の塗装方法によれば、表面に凹凸を有する建築板であっても、搬送しながら、該建築板の表面に塗料を塗り残し無く十分に塗布するとともに、該建築板の表面に形成される塗膜の厚さを均一化することができる。また、該建築板への塗膜の密着を改善することができる。更に、該建築板の表面に飛散した塗料が付着することを防ぐことができる。   According to the coating method of the present invention, even if it is a building board having an uneven surface, it is applied to the surface of the building board without being left unpainted while being conveyed, and is formed on the surface of the building board. The thickness of the coating film can be made uniform. Moreover, the adhesion of the coating film to the building board can be improved. Furthermore, the scattered paint can be prevented from adhering to the surface of the building board.

以下、本発明の実施形態について、初めに本発明を実施する設備の一例を説明し、次に該設備を用いた本発明の塗装方法を説明する。   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.

図１は本発明の塗装方法を実施する設備の一例を示した側方断面図であり、図２は図１に示した設備の１−１’線の断面を上方側から見た断面図である。
図１に示された設備では、建築板Ａが、表面を上側にして搬送ライン上に置かれ、搬送ローラー１を矢印Ｘ方向に回転させることにより、建築板Ａは搬送ライン上を矢印Ｙ方向に搬送される。なお、建築板Ａは、縦３０３０mm、横４６３mmの大きさであり、進行方向に対して垂直側の幅が４６３mmとなるように搬送される。
搬送ラインには、筺体の塗装装置Ｃ１が設けられており、建築板Ａは表面を上側にして塗装装置Ｃ１の内部を通過する。塗装装置Ｃ１は、内部にスプレー１０と、エアーナイフ２０と、空気吹付室３０と、塗料回収室４０と、減圧室５０とを備える。塗装装置Ｃ１において、搬送ラインの上方には、搬入口側から搬出側に向かってスプレー１０、エアーナイフ２０、空気吹付室３０が設けてあり、スプレー１０とエアーナイフ２０の間は壁７１により区画されている。一方、塗装装置Ｃ１において、搬送ラインの下方には、搬入口側から搬出側に向かって塗料回収室４０と、減圧室５０とが設けてあり、塗料回収室４０と減圧室５０の間は壁７２により区画されている。なお、塗装装置Ｃ１が筺体であるのは、塗料が外部に飛散することを防ぐためである。
スプレー１０は建築板Ａの表面に塗料Ｂを塗布する塗布装置であり、供給された塗料Ｂを、ノズルから噴射することができる。本設備においては、建築板Ａがスプレー１０の下方を通過する際に、ノズルから塗料Ｂを噴射して、建築板Ａの表面に塗料Ｂを塗布量５０ｇ／尺２以上となるよう塗布し、建築板Ａの表面を塗り残し無く十分に塗布することができる。
エアーナイフ２０は建築板Ａの表面に塗布された過剰分の塗料を除去し、塗料液膜を形成する除去装置であり、ブロアー室６１からエアー分配室６２を介して空気が供給されるようになされており、エアーナイフ２０の先端ノズルから高圧の空気を吹き付けることができる。本設備においては、スプレー１０により表面に塗料Ｂが塗布された建築板Ａがエアーナイフ２０の下方を通過する際に、先端ノズルから空気を吹き付け、建築板Ａの表面の過剰分の塗料を空気により除去し、厚さが均一な塗料液膜を形成することができる。なお、図２に示すように、エアーナイフ２０の進行方向に対して垂直側の幅は、建築板Ａの進行方向に対して垂直側の幅よりも広く、エアーナイフ２０は、建築板Ａを、進行方向に対して斜めに横断する状態となるように設置されているので、建築板Ａへの空気の吹き付けが、進行方向に対して斜めに横断した状態で行われる。この状態で高圧の空気を吹き付けると、余剰塗料は建築板Ａを斜めに横断して最後には建築板Ａの端部から落ちることとなり、確実に過剰分の塗料を除去し、塗料液膜を形成することができる。また、建築板Ａに塗り残しがあった場合でも過剰分の塗料により塗料を補充し、塗料液膜を形成することもできる。
なお、スプレー１０とエアーナイフ２０の間は壁７１により区画されており、エアーナイフ２０から吹き出された空気やエアーナイフ２０により飛散した塗料Ｂがスプレー１０に影響を与えることを防いでいる。
空気吹付室３０は建築板Ａの表面の塗料液膜に空気を吹き付ける加圧装置であり、空気吹き出し口３１と、整流板３２とを備えており、ブロアー室６１からエアー分配室６２を介して空気が供給されるようになされており、空気吹き出し口３１より空気を吹き出すことができる。空気吹き出し口３１より吹き出される空気は、整流板３２により整流されるので、空気吹き出し口３１の全体から空気を吹き出すことができる。空気吹き出し口３１の進行方向に対して垂直側の幅は、図２に示すように、建築板Ａの進行方向に対して垂直側の幅よりも広く、かつ、図１に示すように、建築板Ａの側面をも覆っている。この状態で空気吹き出し口３１より空気を吹き出すと、建築板Ａの表面全体に確実に空気を吹き付けることができるとともに、建築板Ａの表面と側面に、エアーナイフ２０により飛散した塗料が付着することを防ぐことができる。本設備においては、エアーナイフ２０により過剰分の塗料が除去され、塗料液膜が形成された建築板Ａが空気吹付室３０の下方を通過する際に、空気吹き出し口３１から空気を吹き付けることができる。この空気吹付室３０の空気吹き付けにより、塗料Ｂは建築板Ａの表面内部方向へ押圧されることとなり、建築板Ａの表面にある微細な凹凸を埋めるので、建築板Ａの表面に形成された塗料液膜の厚さを更に均一にするとともに、建築板Ａへの塗料Ｂの密着が改善される。なお、空気吹付室３０はエアーナイフ２０よりも搬出口側に設けられているので、空気吹き出し口３１の先端は、エアーナイフ２０の設置状態に沿って、建築板Ａを斜めに横断した形状となっている。また、空気吹き出し口３１の前端部には断面Ｌ字形状のアングル３３を有する。このアングル３３を有することにより、エアーナイフ２０により除去され飛散した塗料が空気吹付室３０に、特に空気吹き出し口３１の上面に付着したとしても、付着した塗料はアングル３３に沿って横方向に流れ、空気吹き出し口３１の横端部から落ちるので、前端部から垂れて建築板の表面に付着することを防ぐことができ、建築板Ａの外観を損なわない。
なお、エアーナイフ２０と空気吹付室３０の間には若干の隙間があるが、本設備において、エアーナイフ２０と空気吹付室３０は１つの筺体の１区画内にあり、エアーナイフ２０と空気吹付室３０のどちらも建築板Ａの表面を加圧しているので、同区画内は全体として加圧状態にあり、建築板Ａの表面は、エアーナイフ２０から空気吹付室３０へ搬送される間も大気圧以上の圧力がかかった状態にある。
塗料回収室４０はスプレー１０から噴射されたが建築板Ａに塗布されなかった塗料Ｂ、及び、エアーナイフ２０により除去された塗料Ｂを回収する装置である。本設備においては、建築板Ａが塗料回収室４０の上方を通過する際に、スプレー１０から噴射されたが建築板Ａに塗布されなかった塗料Ｂ、及び、エアーナイフ２０により除去された塗料Ｂを回収する。回収された塗料Ｂは金網（図示せず）により濾過し、ポンプ４１により再びスプレー１０に供給される。
減圧室５０は建築板Ａの裏面を減圧する減圧装置であり、減圧室５０内の空気をブロアー室６１へ送ることにより減圧室５０内を減圧して、建築板Ａの裏面を減圧することができる。本設備においては、建築板Ａが減圧室５０の上方を通過する際に、減圧室５０内の空気をブロアー室６１へ送ることにより減圧室５０内を減圧して、建築板Ａの裏面を減圧する。減圧室５０は空気吹付室３０の下方にあるので、塗料Ｂは建築板Ａの表面内部方向へ押圧されるとともに裏面側へ引っ張られるので、建築板Ａの表面にある微細な凹凸を更に埋めやすくなり、建築板Ａの表面に形成された塗料液膜の厚さを更に均一にするとともに、建築板Ａへの塗料Ｂの密着が更に改善される。また、減圧室５０は空気吹き出し口３１により上方の一部が常に覆われた状態なので、減圧する際の空気の吸い込みが安定する。 FIG. 1 is a side sectional view showing an example of equipment for performing the coating method of the present invention, and FIG. 2 is a sectional view of the equipment shown in FIG. is there.
In the facility shown in FIG. 1, the building board A is placed on the transport line with the surface facing up, and the building board A rotates on the transport line in the arrow Y direction by rotating the transport roller 1 in the arrow X direction. To be transported. 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.
The transport line is provided with a casing coating device C1, and the building board A passes through the interior of the coating device C1 with the surface facing up. The coating apparatus C1 includes a spray 10, an air knife 20, an air spray chamber 30, a paint recovery chamber 40, and a decompression chamber 50 therein. In the coating apparatus C1, a spray 10, an air knife 20, and an air blowing chamber 30 are provided above the transport line from the carry-in side to the carry-out side. Has been. On the other hand, in the coating apparatus C1, a paint recovery chamber 40 and a decompression chamber 50 are provided below the transfer line from the carry-in side to the carry-out side, and there is a wall between the paint collection chamber 40 and the decompression chamber 50. 72. The reason why the coating apparatus C1 is a casing is to prevent the paint from scattering to the outside.
The spray 10 is a coating device that applies the coating material B to the surface of the building board A, and can spray the supplied coating material B from a nozzle. In this equipment, when the building board A passes below the spray 10, the paint B is sprayed from the nozzle, and the coating B is applied to the surface of the building board A so that the coating amount is 50 g / scale 2 or more. The surface of the building board A can be sufficiently applied without being left uncoated.
The air knife 20 is a removing device that removes an excessive amount of paint applied to the surface of the building board A to form a paint liquid film so that air is supplied from the blower chamber 61 through the air distribution chamber 62. The high pressure air can be blown from the tip nozzle of the air knife 20. In this equipment, when the building board A having the surface coated with the paint B by the spray 10 passes below the air knife 20, air is blown from the tip nozzle to remove excess paint on the surface of the building board A. Thus, a coating liquid film having a uniform thickness can be formed. In addition, as shown in FIG. 2, the width | variety on the perpendicular | vertical side with respect to the advancing direction of the air knife 20 is wider than the width | variety on the perpendicular | vertical side with respect to the advancing direction of the building board A, and the air knife 20 Since it is installed so as to be obliquely crossed with respect to the traveling direction, the blowing of air to the building board A is performed obliquely with respect to the traveling direction. When high-pressure air is blown in this state, surplus paint crosses the building board A diagonally and finally falls from the end of the building board A, so that the excess paint is surely removed and the paint liquid film is removed. Can be formed. Further, even when the building board A is left unpainted, the paint can be replenished with an excessive amount of paint to form a paint liquid film.
The spray 10 and the air knife 20 are partitioned by a wall 71 to prevent the air blown from the air knife 20 or the paint B scattered by the air knife 20 from affecting the spray 10.
The air blowing chamber 30 is a pressurizing device that blows air onto the coating liquid film on the surface of the building board A. The air blowing chamber 30 includes an air blowing port 31 and a rectifying plate 32, and is provided from the blower chamber 61 through the air distribution chamber 62. Air is supplied, and air can be blown out from the air outlet 31. Since the air blown out from the air blowing port 31 is rectified by the rectifying plate 32, the air can be blown out from the entire air blowing port 31. As shown in FIG. 2, the width on the vertical side with respect to the traveling direction of the air outlet 31 is wider than the width on the vertical side with respect to the traveling direction of the building board A, and as shown in FIG. The side surface of the plate A is also covered. When air is blown out from the air outlet 31 in this state, air can be reliably blown over the entire surface of the building board A, and the paint scattered by the air knife 20 can adhere to the surface and side surfaces of the building board A. Can be prevented. In this facility, when the building board A on which the excess paint is removed by the air knife 20 and the coating liquid film is formed passes below the air blowing chamber 30, air can be blown from the air outlet 31. it can. By the air blowing in the air blowing chamber 30, the paint B is pressed toward the inside of the surface of the building board A and fills the fine irregularities on the surface of the building board A, so that it is formed on the surface of the building board A. While making the thickness of the coating liquid film more uniform, the adhesion of the coating B to the building board A is improved. In addition, since the air blowing chamber 30 is provided in the exit side rather than the air knife 20, the front-end | tip of the air blowing port 31 is the shape which crossed the building board A diagonally along the installation state of the air knife 20. It has become. Further, the front end portion of the air outlet 31 has an angle 33 having an L-shaped cross section. By having this angle 33, even if the paint removed and scattered by the air knife 20 adheres to the air blowing chamber 30, particularly the upper surface of the air outlet 31, the attached paint flows laterally along the angle 33. Since it falls from the lateral end of the air outlet 31, it can be prevented from dripping from the front end and adhering to the surface of the building board, and the appearance of the building board A is not impaired.
Although there is a slight gap between the air knife 20 and the air blowing chamber 30, in this facility, the air knife 20 and the air blowing chamber 30 are in one section of one housing, and the air knife 20 and the air blowing chamber 30 are blown. Since both of the chambers 30 pressurize the surface of the building board A, the inside of the same section is in a pressurized state as a whole, and the surface of the building board A is also transferred from the air knife 20 to the air blowing chamber 30. The pressure is higher than atmospheric pressure.
The paint recovery chamber 40 is a device that recovers the paint B sprayed from the spray 10 but not applied to the building board A and the paint B removed by the air knife 20. In this equipment, when the building board A passes above the paint recovery chamber 40, the paint B sprayed from the spray 10 but not applied to the building board A and the paint B removed by the air knife 20 are used. Recover. The recovered paint B is filtered through a wire mesh (not shown) and supplied again to the spray 10 by the pump 41.
The decompression chamber 50 is a decompression device that decompresses the back surface of the building board A. The inside of the decompression chamber 50 is decompressed by sending the air in the decompression chamber 50 to the blower chamber 61 to decompress the back surface of the building board A. it can. In this facility, when the building board A passes above the decompression chamber 50, the inside of the decompression chamber 50 is decompressed by sending the air in the decompression chamber 50 to the blower chamber 61, and the back surface of the building board A is decompressed. To do. Since the decompression chamber 50 is below the air blowing chamber 30, the paint B is pressed toward the inner surface of the building board A and pulled toward the back surface, so that it is easier to fill fine irregularities on the surface of the building board A. Thus, the thickness of the coating liquid film formed on the surface of the building board A is made more uniform, and the adhesion of the coating B to the building board A is further improved. Further, since the decompression chamber 50 is always in a state where the upper part is always covered by the air outlet 31, the suction of air when decompressing is stabilized.

次に、図１と図２に示した設備を用いた、本発明の塗装方法を説明する。
まず、搬送ローラー１を矢印Ｘ方向に回転させることにより、建築板Ａを、表面を上側にして搬送ライン上を矢印Ｙ方向に搬送し、建築板Ａがスプレー１０の下方を通過する際に、スプレー１０のノズルから塗料Ｂを噴射し、建築板Ａの表面に塗料Ｂが塗布量５０ｇ／尺２以上となるよう塗布する。このスプレー１０による塗料Ｂの塗布により、建築板Ａの表面を塗り残し無く十分に塗布することができる。なお、スプレー１０から噴射されたが建築板Ａに塗布されなかった塗料Ｂは、塗料回収室４０に回収する。
続いて、スプレー１０により表面に塗料Ｂが塗布された建築板Ａがエアーナイフ２０の下方を通過する際に、エアーナイフ２０の先端ノズルから空気を吹き付け、建築板Ａの表面の過剰分の塗料を空気により除去し、建築板Ａの表面に厚さが均一な塗料液膜を形成する。前述したとおり、エアーナイフ２０の進行方向に対して垂直側の幅は、建築板Ａの進行方向に対して垂直側の幅よりも広く、エアーナイフ２０は、建築板Ａを、進行方向に対して斜めに横断する状態となるように設置されており、建築板Ａへの空気の吹き付けが、進行方向に対して斜めに横断した状態で行われるので、余剰塗料は建築板Ａを斜めに横断して最後には建築板Ａの端部から落ちることとなり、確実に過剰分の塗料が除去され、厚さが均一な塗料液膜が形成される。また、建築板Ａに塗り残しがあった場合には過剰分の塗料により塗料が補充され、塗料液膜が形成される。なお、エアーナイフ２０により除去された塗料Ｂは、塗料回収室４０に回収する。
更に、エアーナイフ２０により過剰分の塗料が除去され、塗料液膜が形成された建築板Ａが空気吹付室３０の下方を通過する際に、空気吹き出し口３１から空気を吹き付ける。前述したとおり、空気吹き出し口３１より吹き出される空気は、整流板３２により整流され、空気吹き出し口３１の全体から空気が吹き出されており、空気吹き出し口３１の進行方向に対して垂直側の幅は、建築板Ａの進行方向に対して垂直側の幅よりも広く、かつ、建築板Ａの側面をも覆っているので、建築板Ａの表面と側面に、エアーナイフ２０により飛散した塗料が付着することを防ぐとともに、建築板Ａの表面全体に確実に空気を吹き付けられる。この空気の吹きつけにより、塗料Ｂは建築板Ａの表面内部方向へ押圧されることとなり、建築板Ａの表面にある微細な凹凸を埋めるので、建築板Ａの表面に形成された塗料液膜の厚さを更に均一にするとともに、建築板Ａへの塗料Ｂの密着が改善される。
更に、建築板Ａが減圧室５０の上方を通過する際に、減圧室５０内の空気をブロアー室６１へ送ることにより減圧室５０内を減圧して、建築板Ａの裏面を減圧する。前述したように、減圧室５０は空気吹付室３０の下方にあるので、塗料Ｂは建築板Ａの表面内部方向へ押圧されるとともに裏面側へ引っ張られるので、建築板Ａの表面にある微細な凹凸を更に埋めやすくなり、建築板Ａの表面に形成された塗料液膜の厚さを更に均一にするとともに、建築板Ａへの塗料Ｂの密着が更に改善される。また、減圧室５０は空気吹き出し口３１により上方の一部が常に覆われた状態なので、減圧する際の空気の吸い込みが安定する。 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 1 in the direction of the arrow X, the building board A is transported in the direction of the arrow Y with the surface facing up, and when the building board A passes below the spray 10, The coating material B is sprayed from the nozzle of the spray 10 and applied to the surface of the building board A so that the coating amount is 50 g / scale 2 or more. By applying the coating material B by the spray 10, the surface of the building board A can be sufficiently applied without being left uncoated. The paint B sprayed from the spray 10 but not applied to the building board A is collected in the paint collection chamber 40.
Subsequently, when the building board A with the coating material B applied to the surface by the spray 10 passes below the air knife 20, air is blown from the tip nozzle of the air knife 20, and the excess paint on the surface of the building board A is sprayed. Is removed by air, and a paint liquid film having a uniform thickness is formed on the surface of the building board A. As described above, the width on the vertical side with respect to the traveling direction of the air knife 20 is wider than the width on the vertical side with respect to the traveling direction of the building board A, and the air knife 20 Since the air is blown to the building board A in a state where it is obliquely crossed with respect to the traveling direction, the surplus paint crosses the building board A diagonally. Finally, it falls from the end of the building board A, and the excess paint is surely removed, and a paint liquid film having a uniform thickness is formed. Further, when the building board A is left unpainted, the paint is replenished with an excessive amount of paint, and a paint liquid film is formed. The paint B removed by the air knife 20 is collected in the paint collection chamber 40.
Furthermore, when the building board A on which the excess paint is removed by the air knife 20 and the coating liquid film is formed passes below the air blowing chamber 30, air is blown from the air blowing port 31. As described above, the air blown from the air blowing port 31 is rectified by the rectifying plate 32, and the air is blown from the entire air blowing port 31, and the width on the vertical side with respect to the traveling direction of the air blowing port 31. Is wider than the width of the building board A in the vertical direction and covers the side surface of the building board A, so that the paint scattered by the air knife 20 is applied to the surface and side of the building board A. While preventing adhesion, air is reliably blown over the entire surface of the building board A. By blowing this air, the paint B is pressed toward the inside of the surface of the building board A and fills the fine irregularities on the surface of the building board A, so that the paint liquid film formed on the surface of the building board A Is made more uniform, and adhesion of the paint B to the building board A is improved.
Furthermore, when the building board A passes above the decompression chamber 50, the inside of the decompression chamber 50 is decompressed by sending the air in the decompression chamber 50 to the blower chamber 61, and the back surface of the building board A is decompressed. As described above, since the decompression chamber 50 is located below the air blowing chamber 30, the paint B is pressed toward the inner surface of the building board A and pulled toward the back surface. It becomes easier to fill the unevenness, the thickness of the coating liquid film formed on the surface of the building board A is made more uniform, and the adhesion of the coating B to the building board A is further improved. Further, since the decompression chamber 50 is always in a state where the upper part is always covered by the air outlet 31, the suction of air when decompressing is stabilized.

更に、本発明の塗装方法を実施する設備の別の一例を示す。
図３は本発明の塗装方法を実施する設備の別の一例を示した側方断面図であり、図４は図３に示した設備の１−１’線の断面を上方側から見た断面図である。
搬送ラインには、筺体の塗装装置Ｃ２が設けられており、建築板Ａは表面を上側にして塗装装置Ｃ２の内部を通過する。塗装装置Ｃ２は、図１と図２に示された塗装装置Ｃ１のスプレー１０をフローコーター１１に変更しただけであり、他は塗装装置Ｃ１と同じである。すなわち、塗装装置Ｃ２は、内部にフローコーター１１と、エアーナイフ２０と、空気吹付室３０と、塗料回収室４０と、減圧室５０とを備える。塗装装置Ｃ２において、搬送ラインの上方には、搬入口側から搬出側に向かってフローコーター１１、エアーナイフ２０、空気吹付室３０が設けてあり、フローコーター１１とエアーナイフ２０の間は壁７１により区画されている。一方、塗装装置Ｃ２において、搬送ラインの下方には、搬入口側から搬出側に向かって塗料回収室４０と、減圧室５０とが設けてあり、塗料回収室４０と減圧室５０の間は壁７２により区画されている。
本設備では、フローコーター１１により、建築板Ａの表面に塗料Ｂを塗布量５０ｇ／尺２以上となるよう塗布し、建築板Ａの表面を塗り残し無く十分に塗布することができる。なお、フローコーター１１から流下されたが建築板Ａに塗布されなかった塗料Ｂは、塗料回収室４０に回収する。
エアーナイフ２０と、空気吹付室３０と、塗料回収室４０と、減圧室５０とについては図１と図２に示した設備と同じであり、図１と図２に示した設備と同様に、建築板Ａの表面に塗料Ｂを塗り残し無く十分に塗布するとともに、建築板Ａの表面に形成される塗料液膜の厚さを均一化することができる。 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 cross section of the equipment shown in FIG. FIG.
The transport line is provided with a casing coating apparatus C2, and the building board A passes through the interior of the coating apparatus C2 with the surface facing upward. The coating apparatus C2 is the same as the coating apparatus C1 except that the spray 10 of the coating apparatus C1 shown in FIGS. 1 and 2 is changed to the flow coater 11. That is, the coating apparatus C2 includes a flow coater 11, an air knife 20, an air spray chamber 30, a paint recovery chamber 40, and a decompression chamber 50 therein. In the coating apparatus C2, the flow coater 11, the air knife 20, and the air blowing chamber 30 are provided above the transfer line from the carry-in side to the carry-out side, and a wall 71 is provided between the flow coater 11 and the air knife 20. It is divided by. On the other hand, in the coating apparatus C2, a paint recovery chamber 40 and a decompression chamber 50 are provided below the transport line from the carry-in side to the carry-out side, and there is a wall between the paint collection chamber 40 and the decompression chamber 50. 72.
In this facility, the coating material B can be applied to the surface of the building board A by the flow coater 11 so that the application amount is 50 g / scale 2 or more, and the surface of the building board A can be sufficiently applied without being left uncoated. The paint B that has flowed down from the flow coater 11 but has not been applied to the building board A is collected in the paint collection chamber 40.
The air knife 20, the air spray chamber 30, the paint recovery chamber 40, and the decompression chamber 50 are the same as the equipment shown in FIGS. 1 and 2, and similarly to the equipment shown in FIGS. The paint B can be sufficiently applied to the surface of the building board A without being applied, and the thickness of the coating liquid film formed on the surface of the building board A can be made uniform.

次に、図３と図４に示した設備を用いた、本発明の塗装方法を説明する。
図３と図４に示された設備では、図１と図２に示された設備において、スプレー１０をフローコーター１１に変更したので、搬送された建築板Ａの表面に、フローコーター１１により、塗布量５０ｇ／尺２以上となるよう塗料Ｂを塗布する。このフローコーター１１による塗料Ｂの塗布により、建築板Ａの表面を塗り残し無く十分に塗布することができる。なお、フローコーター１１から流下されたが建築板Ａに塗布されなかった塗料Ｂは、塗料回収室４０に回収する。
他は図１と図２に示された設備と同じなので、フローコーター１１以後の塗装方法は、上述した図１と図２に示した設備を用いた塗装方法と同様である。すなわち、エアーナイフ２０により建築板Ａの表面の過剰分の塗料を除去して、塗料液膜を形成し、続いて空気吹付室３０の空気吹き出し口３１から建築板Ａの塗料液膜に空気を吹き付け、更に、減圧室５０内の空気をブロアー室６１へ送ることにより減圧室５０内を減圧して、建築板Ａの裏面を減圧する。なお、エアーナイフ２０により除去された塗料Ｂも塗料回収室４０に回収する。
図３と図４に示した設備を用いた塗装方法においても、図１と図２に示した設備を用いた塗装方法と同様に、建築板Ａの表面に塗料Ｂを塗り残し無く十分に塗布するとともに、建築板Ａの表面に形成された塗料液膜の厚さを更に均一にし、建築板Ａへの塗料Ｂの密着を改善することができる。 Next, the coating method of the present invention using the equipment shown in FIGS. 3 and 4 will be described.
In the equipment shown in FIGS. 3 and 4, since the spray 10 is changed to the flow coater 11 in the equipment shown in FIGS. 1 and 2, the flow coater 11 is used on the surface of the transported building board A. The coating material B is applied so that the application amount is 50 g / scale 2 or more. By applying the coating material B by the flow coater 11, the surface of the building board A can be sufficiently applied without being left uncoated. The paint B that has flowed down from the flow coater 11 but has not been applied to the building board A is collected in the paint collection chamber 40.
Since the rest is the same as the equipment shown in FIGS. 1 and 2, the coating method after the flow coater 11 is the same as the coating method using the equipment shown in FIGS. 1 and 2 described above. That is, the air knife 20 removes excess paint on the surface of the building board A to form a paint liquid film, and then air is supplied from the air outlet 31 of the air blowing chamber 30 to the paint liquid film of the building board A. Further, the inside of the decompression chamber 50 is decompressed by sending the air in the decompression chamber 50 to the blower chamber 61, and the back surface of the building board A is decompressed. The paint B removed by the air knife 20 is also collected in the paint collection chamber 40.
In the painting method using the equipment shown in FIGS. 3 and 4, as well as the painting method using the equipment shown in FIGS. In addition, the thickness of the coating liquid film formed on the surface of the building board A can be made more uniform, and the adhesion of the coating B to the building board A can be improved.

更に、本発明の塗装方法を実施する設備の更に別の一例を示す。
図５は本発明の塗装方法を実施する設備の更に別の一例を示した側方断面図であり、図６は図５に示した設備の１−１’線の断面を上方側から見た断面図である。
搬送ラインには、筺体の塗装装置Ｃ３が設けられており、建築板Ａは表面を上側にして塗装装置Ｃ３の内部を通過する。塗装装置Ｃ３は、図１と図２に示された塗装装置Ｃ１の空気吹付室３０の形状を変更するとともに、アングル３３を無して折り曲げ３４を有し、更に、壁７３を追加しているが、他は塗装装置Ｃ１と同じである。折り曲げ３４は空気吹き出し口の前端部に形成されており、上方に向かって折り曲げられている。壁７３は、空気吹き出し口３１の上方で、折り曲げ３４よりも搬出口側に設けられており、エアーナイフ２０で飛散した塗料Ｂが壁７３よりも搬出口側へ移動することを防いでおり、空気吹付室３０への塗料Ｂの付着を軽減することができる。壁７３に付着した塗料Ｂは空気吹き出し口３１の上面に垂れるが、空気吹き出し口３１の上面が傾斜形状となっているので、空気吹き出し口３１の上面の塗料Ｂは前端部方向へ移動することとなる。前端部には折り曲げ３４が形成されているので、この折り曲げ３３により塗料Ｂは横方向に流れ、空気吹き出し口３１の横端部から落ちる。
また、塗装装置Ｃ３は、内部にスプレー１０と、エアーナイフ２０と、空気吹付室３０と、塗料回収室４０と、減圧室５０をも備える。塗装装置Ｃ３において、搬送ラインの上方には、搬入口側から搬出側に向かってスプレー１０、エアーナイフ２０、空気吹付室３０が設けてあり、スプレー１０とエアーナイフ２０の間は壁７１により区画されている。一方、塗装装置Ｃ３において、搬送ラインの下方には、搬入口側から搬出側に向かって塗料回収室４０、減圧室５０が設けてある。
スプレー１０と、エアーナイフ２０と、空気吹付室３０と、塗料回収室４０と、減圧室５０とについては図１と図２に示した設備と同じであり、図１と図２に示した設備と同様に、建築板Ａの表面に塗料Ｂを塗り残し無く十分に塗布するとともに、建築板Ａの表面に形成される塗料液膜の厚さを均一化することができる。 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 painting method of the present invention, and FIG. 6 is a sectional view taken along line 1-1 ′ of the equipment shown in FIG. It is sectional drawing.
The transport line is provided with a casing coating device C3, and the building board A passes through the interior of the coating device C3 with the surface facing up. The coating apparatus C3 changes the shape of the air blowing chamber 30 of the coating apparatus C1 shown in FIGS. 1 and 2, has a bend 34 without an angle 33, and further adds a wall 73. The others are the same as the coating apparatus C1. The bend 34 is formed at the front end of the air outlet and is bent upward. The wall 73 is provided above the air outlet 31 and closer to the carry-out side than the bend 34, and the paint B scattered by the air knife 20 is prevented from moving to the carry-out side from the wall 73. Adhesion of the paint B to the air blowing chamber 30 can be reduced. Although the paint B adhering to the wall 73 hangs down on the upper surface of the air outlet 31, the upper surface of the air outlet 31 is inclined so that the paint B on the upper surface of the air outlet 31 moves toward the front end. It becomes. Since the bend 34 is formed at the front end portion, the paint B flows in the lateral direction by the bend 33 and falls from the lateral end portion of the air outlet 31.
The coating apparatus C3 also includes a spray 10, an air knife 20, an air spray chamber 30, a paint recovery chamber 40, and a decompression chamber 50 therein. In the coating apparatus C3, a spray 10, an air knife 20, and an air blowing chamber 30 are provided above the transport line from the carry-in side toward the carry-out side, and a partition between the spray 10 and the air knife 20 is defined by a wall 71. Has been. On the other hand, in the coating apparatus C3, a paint recovery chamber 40 and a decompression chamber 50 are provided below the transport line from the carry-in side toward the carry-out side.
The spray 10, the air knife 20, the air spray chamber 30, the paint recovery chamber 40, and the decompression chamber 50 are the same as the facilities shown in FIGS. 1 and 2, and the facilities shown in FIGS. Similarly, the paint B can be sufficiently applied to the surface of the building board A without being left uncoated, and the thickness of the coating liquid film formed on the surface of the building board A can be made uniform.

次に、図５と図６に示した設備を用いた、本発明の塗装方法を説明する。
図５と図６に示した設備を用いた塗装方法においても、図１と図２に示した設備を用いた塗装方法と同様に、スプレー１０により建築板Ａの表面に塗料Ｂを塗布し、余剰分の塗料Ｂをエアーナイフ２０で除去するとともに、建築板Ａの表面に塗料液膜を形成させ、更に、空気吹き出し口３１から建築板Ａの表面の塗料液膜に空気を吹き付け、更に、減圧室５０内の空気をブロアー室６１へ送ることにより減圧室５０内を減圧して、建築板Ａの裏面を減圧する。なお、スプレー１０から噴射されたが建築板Ａに塗布されなかった塗料Ｂ、及びエアーナイフ２０により除去された塗料Ｂは塗料回収室４０に回収する。
図５と図６に示した設備を用いた塗装方法においても、図１と図２に示した設備を用いた塗装方法と同様に、建築板Ａの表面に塗料Ｂを塗り残し無く十分に塗布するとともに、建築板Ａの表面に形成された塗料液膜の厚さを更に均一にし、建築板Ａへの塗料Ｂの密着を改善することができる。 Next, the coating method of the present invention using the equipment shown in FIGS. 5 and 6 will be described.
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 paint B is applied to the surface of the building board A by the spray 10. The excess paint B is removed with the air knife 20, a paint liquid film is formed on the surface of the building board A, air is further blown from the air outlet 31 to the paint liquid film on the surface of the building board A, By sending the air in the decompression chamber 50 to the blower chamber 61, the inside of the decompression chamber 50 is decompressed, and the back surface of the building board A is decompressed. The paint B sprayed from the spray 10 but not applied to the building board A and the paint B removed by the air knife 20 are collected in the paint collection chamber 40.
In the painting method using the equipment shown in FIGS. 5 and 6, as well as the painting method using the equipment shown in FIGS. In addition, the thickness of the coating liquid film formed on the surface of the building board A can be made more uniform, and the adhesion of the coating B to the building board A can be improved.

以上に本発明の一実施形態について説明したが、本発明はこれに限定されず、特許請求の範囲に記載の発明の範囲内において種々の変形態を取り得る。例えば、図１と図２に示した設備において、塗装装置を１つの筺体とせず、スプレー、エアーナイフ、空気吹付室毎に筺体を設けても良い。その場合の塗装方法は、上述した図１と図２に示した設備を用いた塗装方法と同じである。また、幅の短いエアーナイフを複数設置し、複数のエアーナイフにより建築板の表面の余剰塗料を除去しても良いし、エアーナイフに変えてロールコーターなどを設置し、ロールコーターなどを接触させて余剰塗料を除去しても良い。   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, in the facilities shown in FIGS. 1 and 2, the coating apparatus may not be a single casing, but a casing may be provided for each spray, air knife, and air blowing chamber. The coating method in that case is the same as the coating method using the equipment shown in FIG. 1 and FIG. In addition, multiple air knives with a short width may be installed, and the excess paint on the surface of the building board may be removed with multiple air knives, or a roll coater or the like may be installed instead of the air knife to contact the roll coater or the like. The excess paint may be removed.

以上説明したように、本発明の塗装方法によれば、表面に凹凸を有する建築板であっても、搬送しながら、該建築板の表面に塗料を塗り残し無く十分に塗布するとともに、該建築板の表面に形成される塗膜の厚さを均一化することができる。また、該建築板への塗膜の密着を改善することができる。更に、該建築板の表面に飛散した塗料が付着することを防ぐことができる。   As described above, according to the coating method of the present invention, even if the building board has unevenness on the surface, it is sufficiently applied without leaving any paint on the surface of the building board while being transported. The thickness of the coating film formed on the surface of the plate can be made uniform. Moreover, the adhesion of the coating film to the building board can be improved. Furthermore, the scattered paint can be prevented from adhering to the surface of the building board.

本発明の塗装方法を実施する設備の一例を示した側方断面図である。It is side sectional drawing which showed an example of the equipment which enforces the coating method of this invention. 図１に示した設備の１−１’線の断面を上方側から見た断面図である。It is sectional drawing which looked at the cross section of the 1-1 'line | wire of the installation shown in FIG. 1 from the upper side. 本発明の塗装方法を実施する設備の別の一例を示した側方断面図である。It is side sectional drawing which showed another example of the equipment which enforces the coating method of this invention. 図３に示した設備の１−１’線の断面を上方側から見た断面図である。It is sectional drawing which looked at the cross section of the 1-1 'line of the installation shown in FIG. 3 from the upper side. 本発明の塗装方法を実施する設備の更に別の一例を示した側方断面図である。It is the sectional side view which showed another example of the equipment which enforces the coating method of this invention. 図５に示した設備の１−１’線の断面を上方側から見た断面図である。It is sectional drawing which looked at the cross section of the 1-1 'line of the installation shown in FIG. 5 from the upper side.

符号の説明Explanation of symbols

Ａ 建築板
Ｂ 塗料
Ｃ１〜Ｃ３ 塗装装置
１ 搬送ローラー
１０ スプレー
１１ フローコーター
２０ エアーナイフ
３０ 空気吹付室
３１ 空気吹き出し口
３２ 整流板
３３ アングル
３４ 折り曲げ
４０ 塗料回収室
４１ ポンプ
５０ 減圧室
６１ ブロアー室
６２ エアー分配室
７１ 壁
７２ 壁
７３ 壁 A Building board B Paint C1-C3 Coating device 1 Conveying roller 10 Spray 11 Flow coater 20 Air knife 30 Air blowing chamber 31 Air outlet 32 Rectifier plate 33 Angle 34 Bending 40 Paint recovery chamber 41 Pump 50 Decompression chamber 61 Blower chamber 62 Air Distribution room 71 Wall 72 Wall 73 Wall

Claims (5)

建築板の表面を上側にして搬送しながら塗装を施す塗装方法であって、
上記建築板の表面に塗料を塗布する工程と、
上記建築板の表面に塗布された過剰分の塗料を除去し、塗料液膜を形成する工程と、
上記建築板の表面の塗料液膜に空気を吹き付けて、該塗料液膜を加圧する工程とを有し、
上記建築板の表面の塗料液膜に空気を吹き付ける工程は、該建築板の表面が、該建築板の横幅よりも広い横幅の空気吹き出し口に覆われた状態で、該空気吹き出し口から空気を吹き出すことにより行い、
上記建築板の表面に塗布された過剰分の塗料を除去する工程の後に、該建築板の表面の塗料液膜に空気を吹き付ける工程を行い、
上記建築板の表面に塗布された過剰分の塗料を除去する工程から該建築板の表面の塗料液膜に空気を吹き付ける工程までの間、該建築板の表面に大気圧以上の圧力がかかっている状態とする
ことを特徴とする建築板の塗装方法。 It is a painting method for painting while conveying with the surface of the building board facing up,
Applying a paint to the surface of the building board;
Removing excess paint applied to the surface of the building board and forming a paint liquid film;
A step of pressurizing the paint liquid film by blowing air to the paint liquid film on the surface of the building board,
The step of spraying air onto the coating liquid film on the surface of the building board includes the step of blowing air from the air outlet with the surface of the building board covered with an air outlet having a width wider than the width of the building board. Done by blowing out,
After the step of removing excess paint applied to the surface of the building board, performing a step of blowing air to the coating liquid film on the surface of the building board,
Between the step of removing the excess paint applied to the surface of the building board and the step of blowing air to the coating liquid film on the surface of the building board, a pressure higher than atmospheric pressure is applied to the surface of the building board. A method of painting a building board, characterized in that 請求項１に記載の塗装方法であって、
前記建築板の表面の塗料液膜に空気を吹き付ける工程は、更に、該建築板の側面が前記空気吹き出し口に覆われた状態で、前記空気吹き出し口から空気を吹き出すことにより行う
ことを特徴とする建築板の塗装方法。 The coating method according to claim 1,
The step of blowing air to the coating liquid film on the surface of the building board is further performed by blowing air from the air blowing port in a state where a side surface of the building board is covered with the air blowing port. How to paint building boards. 請求項１又は請求項２に記載の塗装方法であって、
前記建築板の表面の塗料液膜に空気を吹き付ける工程は、更に、整流板により空気を整流し、前記空気吹き出し口から空気を吹き出すことにより行う
ことを特徴とする建築板の塗装方法。 The coating method according to claim 1 or claim 2,
The step of spraying air onto the coating liquid film on the surface of the building board is further performed by rectifying air with a rectifying plate and blowing out air from the air outlet. 請求項１〜３のいずれかに記載の塗装方法であって、
更に、前記建築板の裏面を減圧する工程を有し、
前記建築板の表面の塗料液膜に空気を吹き付ける工程を行いながら、該建築板の裏面を減圧する工程を行う
ことを特徴とする建築板の塗装方法。 It is the coating method in any one of Claims 1-3,
Furthermore, it has the process of decompressing the back of the building board,
A method for painting a building board, comprising: performing a step of decompressing a back surface of the building board while performing a process of blowing air onto a coating liquid film on the surface of the building board. 請求項４に記載の塗装方法であって、
前記建築板の表面の塗料液膜に空気を吹き付ける工程は、該建築板の裏面を減圧する工程より長く行われる
ことを特徴とする建築板の塗装方法。 The coating method according to claim 4,
The method of painting a building board, wherein the step of blowing air to the coating liquid film on the surface of the building board is performed longer than the step of reducing the pressure of the back surface of the building board.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002282762A (en) * 2001-03-27 2002-10-02 Asahi Kasei Corp Coated porous plate and coater, coating method
JP2002282751A (en) * 2001-03-29 2002-10-02 Toa Kogyo Kk Coater and method of manufacturing coated material
JP2003136017A (en) * 2001-11-05 2003-05-13 Toa Kogyo Kk Coating method of porous plate

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002282762A (en) * 2001-03-27 2002-10-02 Asahi Kasei Corp Coated porous plate and coater, coating method
JP2002282751A (en) * 2001-03-29 2002-10-02 Toa Kogyo Kk Coater and method of manufacturing coated material
JP2003136017A (en) * 2001-11-05 2003-05-13 Toa Kogyo Kk Coating method of porous plate

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