JP3786573B2

JP3786573B2 - Manufacturing method of building materials

Info

Publication number: JP3786573B2
Application number: JP2000344293A
Authority: JP
Inventors: 賢司高橋
Original assignee: Sekisui Chemical Co Ltd
Current assignee: Sekisui Chemical Co Ltd
Priority date: 2000-11-10
Filing date: 2000-11-10
Publication date: 2006-06-14
Anticipated expiration: 2020-11-10
Also published as: JP2002143760A

Description

【０００１】
【発明の属する技術分野】
この発明は、例えば建物の外壁等に用いられる表面に模様付塗膜を形成する建材の製造方法に関する。
【０００２】
【従来の技術】
近年、建物の外壁等に用いられる建材においては、その外観が従来の平坦なものから次第に凹凸立体模様のあるものが求められてきている。
例えば、凹凸立体模様を有する建材の製造方法としては、特公昭５８−５７９８８号公報に記載されているように、基材上に塗材を散点状に吹き付け、これをローラー装置により押さえならしたものが知られている。
【０００３】
【発明が解決しようとする課題】
上記の凹凸立体模様を有する建材の製造方法は、工場生産性に優れているが、凹凸塗膜の凸部を一定の高さ迄に押さえならしているので、形成された凹凸模様は比較的単調なものであって、建築現場で左官工がコテを用いて形成したような、いわゆるコテ引き擦り柄のあるものが得られなかった。
【０００４】
この発明は、上記の点に鑑みてなされたものであり、いわゆるコテ引き擦り柄を有する建材を工場生産する建材の製造方法を提供することを目的とする。
【０００５】
【課題を解決するための手段】
請求項１記載の建材の製造方法は、塗膜が未硬化状態の塗装板体をコンベア上で移送する間に、この塗装板体の表面の未硬化塗膜をローラー装置で押圧して、表面に模様付塗膜を形成する建材の製造方法であって、ローラー装置の押圧面に複数の凸部をそれぞれ不連続的に設け、このローラー装置の押圧面を、塗装板体との接触部において、塗装板体の移送方向と同一方向でかつ塗装板体の移送速度と異なる速度で走行させること-により、前記押圧面に設けられた前記各凸部で前記未硬化塗膜を引き擦り、これにより、前記塗装板体の前記表面に不連続な引き擦り柄を形成することを特徴としている。
【０００６】
請求項２の建材の製造方法は、塗膜が未硬化状態の塗装板体をコンベア上で移送する間に、この塗装板体の表面の未硬化塗膜をローラー装置で押圧して、表面に模様付塗膜を形成する建材の製造方法であって、未硬化塗膜は骨材が混入されたものであって、ローラー装置の押圧面を、塗装板体との接触部において、塗装板体の移送方向と同一方向でかつ塗装板体の移送速度と異なる速度で走行させることにより前記押圧面で前記未硬化塗膜に混入された前記骨材を引き擦り、これにより、前記塗装板体の前記表面に不連続な引き擦り柄を形成することを特徴としている。
【０００７】
請求項３記載の建材の製造方法は、請求項２記載の建材の製造方法において、骨材として、細骨材とこの細骨材よりも大きな骨材とを用いたことを特徴としている。
【０００８】
これらの発明において、塗装板体とは、金属板やセメント板などの板体に塗材を塗装して塗膜を形成したものをいう。
そして、塗膜層を形成する塗材としては特に限定されるものではないが、板体として、金属板を用いる場合には、金属板密着用と防錆用のプライマーを塗布した上に模様付け用塗料を塗布するのが好ましい。
【０００９】
また、金属板としては、アルミニウム板、ステンレス板等があげられるが、これに限定されるものでない。凹凸立体模様に賦形された金属板であってもよく、例えば、着色塗膜付きアルミニウム等の平板を金属プレス機に挟んでプレスして凹凸立体模様を形成したもの等があげられる。金属板には、意匠性や耐蝕性の面から表面に膜が形成されたものが好ましく、この膜は塗材を塗装する前に塗装や化学処理（メッキ、酸化処理）等で形成してもよいが、凹凸立体模様を付けた後に塗装や化学処理（メッキ、酸化処理）等で形成してもよい。
【００１０】
請求項２記載の発明において、骨材としては、０．１〜５ｍｍ径程度の天然石、樹脂ビーズ、雲母等があげられる。
なお、請求項２記載の発明においては、ローラー装置の押圧面に凹凸が設けられていてもよい。
【００１１】
請求項３記載の発明において、細骨材としては、平均０．１ｍｍ径程度の天然石、樹脂ビーズ、雲母等があげられ、この細骨材よりも大きな骨材としては、平均５ｍｍ径程度の天然石、樹脂ビーズ、雲母等があげられる。
【００１２】
（作用）
請求項１記載の建材の製造方法にあっては、ローラー装置の押圧面に凹凸を設け、このローラー装置の押圧面を、塗装板体との接触部において、塗装板体の移送方向と同一方向でかつ塗装板体の移送速度と異なる速度で走行させるので、ローラー装置の押圧面の凹凸が、未硬化の塗膜が引き擦って引きずり模様を形成することになり、いわゆるコテ引き擦り柄のある建材が工場で生産できるようになる。
【００１３】
請求項２記載の建材の製造方法にあっては、未硬化塗膜は骨材が混入されたものであって、ローラー装置の押圧面を、塗装板体との接触部において、塗装板体の移送方向と同一方向でかつ塗装板体の移送速度と異なる速度で走行させるので、ローラー装置の押圧面が未硬化塗膜中の骨材が引き擦って、引きずり模様を形成することになり、いわゆるコテ引き擦り柄のある建材が工場で生産できるようになる。
【００１４】
請求項３記載の建材の製造方法にあっては、骨材として、細骨材とこの細骨材よりも大きな骨材とを用いるので、細骨材は主として塗膜の厚みを出すのに寄与し、ローラー装置の押圧面が主として細骨材よりも大きな骨材を引き擦って、引きずり模様を形成することになり、いわゆるコテ引き擦り柄のある建材が工場で生産できるようになる。
【００１５】
【発明の実施の形態】
この発明の第１の実施の形態を図１〜３を参照して説明する。
図１はこの発明の建材の製造方法の概要を示すものであって、（イ）は製造装置の一例を示す説明図、（ロ）は建材の表面の模様状態を示す斜視図、図２は塗膜が未硬化状態の塗装板体の断面図、図３はこの建材の製造方法によって製造された建材の断面図である。
図面において、１はコンベア、２は塗装板体、３はローラー装置である。
【００１６】
コンベア１の上には塗膜が未硬化状態の塗装板体２が載置されて一定の速度で矢印の方向（図面右方向）に移動するようになっている。
ローラー装置３は、ゴム等からなる無端ベルト３１が押圧具３２と駆動ローラー３３、３３に掛け渡されて回動するように構成されており、コンベア１の上方に設置され、無端ベルト３１の下端面が塗膜が未硬化状態の塗装板体２の表面を押圧するようにされている。図示していないが、無端ベルト３１の外周面には凹凸が設けられ、この凹凸面が塗装板体２の表面に接触するようにされている。
【００１７】
無端ベルト３１は、塗装板体２に接触する部分、つまり押圧具３２に接する部分でコンベア１の移送方向と同一方向に回動するものとされ、その速度はコンベア１の移送速度よりも早いものとされている。なお、３４は押さえローラー、３５は掻き取り板、３６は洗浄ノズルである。
なお、ローラー装置としては、図１に示すものの他、一本のローラーだけであってもよい。
【００１８】
塗膜板体２は、図２に示すように、着色塗膜付きアルミニウ板２１の上に金属板密着用と防錆用のプライマー２２を介して模様付け用塗料が塗装されて塗膜２３が形成されたものであり、塗膜２３が硬化する前にコンベア１の上に載置され移送される。
【００１９】
塗膜板体２の表面の塗膜２３（図１では不図示）は、ローラー装置３の無端ベルト３１に押圧されるが、無端ベルト３１の塗膜板体２の接触面は、凹凸が設けられ、コンベア１の移送方向と同方向にそれよりも早い速度で回動しているため、無端ベルト３１の凸部が塗膜板体２の塗膜２３を引き擦ることになって、引き擦り柄６（図１（ロ）及び図３参照）が形成される。
【００２０】
その後、必要に応じて、塗膜板体２の引き擦り柄６が形成された面に、アクリル系塗料、アクリルシリコーン系塗料、フッソ系塗料、無機塗料等のクリア塗材７を上塗りして塗膜の上を保護し、図３に示すような建材が製造される。
【００２１】
次に、この発明の実施の第２の形態を図４と図５を参照して説明する。
図４はこの発明の建材の製造方法において用いられる塗膜が未硬化状態の塗装板体の断面図、図５はこの建材の製造方法によって製造された建材の断面図である。
【００２２】
この発明の第２の実施の形態において用いられる製造装置は、第１の実施の形態において用いられた図１（イ）に示す装置と特に相違しないので図１（イ）を参照することにする。
【００２３】
塗膜板体２ａは、図４に示すように、着色塗膜付きアルミニウ板２１ａの上に金属板密着用と防錆用のプライマー２２ａを介して模様付け用塗料が塗装されて塗膜２３ａが形成されたものであり、この模様付け用塗料中に細骨材としては、０．１ｍｍ〜０．５ｍｍ径程度の天然石、樹脂ビーズ、雲母等の細骨材４と、この細骨材４よりも大径の平均２ｍｍ径程度の天然石、樹脂ビーズ、雲母等の骨材５が混入されている。
【００２４】
この塗膜板体２ａは、塗膜２３ａが硬化する前にコンベア１の上に載置され移送される。
【００２５】
塗膜板体２ａの表面の塗膜２３ａは、ローラー装置３の無端ベルト３１に押圧されるが、無端ベルト３１の塗膜板体２の接触面は、凹凸が設けられ、コンベア１の移送方向と同方向にそれよりも早い速度で回動しているため、無端ベルト３１の凸部が塗膜板体２ａの塗膜２３ａ中の主として大径の骨材５を、図５の矢印で示すように、引き擦ることになって、引き擦り柄６ａが形成される。
なお、大径の骨材５の上端部が特に塗膜板体２ａの塗膜２３ａの上層面に近接又は突出しているような場合には、ローラー装置３の無端ベルト３１は大径の骨材５に接して摩擦で引き擦るので、無端ベルト３１に凹凸を特に設けなくともよい。
【００２６】
その後、必要に応じて、塗膜板体２ａの引き擦り柄６ａが形成された面に、アクリル系塗料、アクリルシリコーン系塗料、フッソ系塗料、無機塗料等のクリア塗材７ａを上塗りして塗膜の上を保護し、図５に示すような建材が製造される。
【００２７】
上記の実施の第１及び第２の形態において、ローラー装置３の無端ベルト３１の速度をコンベア１の移送速度よりも早い速度で回動させているが、逆に遅い速度で回動させてもよい。
【００２８】
【発明の効果】
請求項１記載の建材の製造方法にあっては、ローラー装置の押圧面の凹凸が、未硬化の塗膜を引き擦って引きずり模様を形成することになり、いわゆるコテ引き擦り柄のある建材が工場で生産できるようになる。
【００２９】
請求項２記載の建材の製造方法にあっては、ローラー装置の押圧面が未硬化塗膜中の骨材を引き擦って、引きずり模様を形成することになり、いわゆるコテ引き擦り柄のある建材が工場で生産できるようになる。
【００３０】
請求項３記載の建材の製造方法にあっては、細骨材は主として塗膜の厚みを出すのに寄与し、ローラー装置の押圧面が主として細骨材よりも大きな骨材を引き擦って、引きずり模様を形成することになり、いわゆるコテ引き擦り柄のある建材が工場で生産できるようになる。
【図面の簡単な説明】
【図１】この発明の建材の製造方法の概要を示すものであって、（イ）は製造装置の一例を示す説明図、（ロ）は建材の表面の模様状態を示す斜視図である。
【図２】この発明の建材の製造方法において用いられる塗膜が未硬化状態の塗装板体の断面図である。
【図３】この建材の製造方法によって製造された建材の断面図である。
【図４】この発明の建材の製造方法の別の形態において用いられる塗膜が未硬化状態の塗装板体の断面図である。
【図５】この発明の建材の製造方法の別の形態に寄って製造された建材の断面図である。
【符号の説明】
１コンベア
２、２ａ塗装板体
３ローラー装置
３１無端ベルト
４、５骨材
７クリア塗材[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a building material that forms a patterned coating film on a surface used for an outer wall of a building, for example.
[0002]
[Prior art]
In recent years, building materials used for building outer walls and the like have been increasingly required to have an uneven three-dimensional pattern from the conventional flat one.
For example, as a method for producing a building material having a three-dimensional pattern, as described in Japanese Patent Publication No. 58-57988, the coating material is sprayed on the substrate in the form of dots, and this is pressed by a roller device. Things are known.
[0003]
[Problems to be solved by the invention]
Although the manufacturing method of the building material having the above three-dimensional uneven pattern is excellent in factory productivity, since the convex part of the uneven film is pressed down to a certain height, the formed uneven pattern is relatively It was monotonous and could not be obtained with a so-called trowel-rubbing pattern that a plasterer made with a trowel at the construction site.
[0004]
This invention is made | formed in view of said point, and it aims at providing the manufacturing method of the building material which produces the building material which has what is called a trowel-rubbed pattern at a factory.
[0005]
[Means for Solving the Problems]
The method for producing a building material according to claim 1 is a method in which a roller device is used to press the uncured coating film on the surface of the coated plate body while the coated plate body on which the coating film is uncured is transferred on a conveyor. A method of manufacturing a building material for forming a patterned coating film on a roller, wherein a plurality of convex portions are provided discontinuously on a pressing surface of a roller device, and the pressing surface of the roller device is provided at a contact portion with a coating plate body. The uncured coating film is rubbed by the convex portions provided on the pressing surface by traveling at a speed different from the transport speed of the paint plate body in the same direction as the transport direction of the paint plate body. Thus, a discontinuous rubbing pattern is formed on the surface of the coated plate body .
[0006]
The manufacturing method of the building material according to claim 2 is a method in which the uncured coating film on the surface of the coated plate body is pressed with a roller device while the coated plate body in which the coated film is in an uncured state is transported on a conveyor. A method for manufacturing a building material for forming a patterned coating film, wherein the uncured coating film is a mixture of aggregate, and the pressing surface of the roller device is applied to the coating plate body at the contact portion with the coating plate body. The aggregate mixed in the uncured coating film is rubbed with the pressing surface by traveling at the same direction as the transfer direction of the coating plate and at a speed different from the transfer speed of the coated plate body. A discontinuous rubbing pattern is formed on the surface .
[0007]
The building material manufacturing method according to claim 3 is characterized in that, in the building material manufacturing method according to claim 2, a fine aggregate and an aggregate larger than the fine aggregate are used as the aggregate.
[0008]
In these inventions, the coated plate refers to a plate formed by coating a coating material on a plate such as a metal plate or a cement plate.
The coating material for forming the coating layer is not particularly limited. However, when a metal plate is used as the plate body, a pattern is formed on the metal plate adhesion and anti-rust primer. It is preferable to apply a coating material.
[0009]
Further, examples of the metal plate include an aluminum plate and a stainless plate, but are not limited thereto. A metal plate shaped into a three-dimensional uneven pattern may be used, and examples thereof include a flat plate such as aluminum with a colored coating film sandwiched between metal presses and pressed to form a three-dimensional uneven pattern. The metal plate preferably has a film formed on the surface in terms of design and corrosion resistance, and this film may be formed by painting or chemical treatment (plating, oxidation treatment) before coating the coating material. However, it may be formed by painting or chemical treatment (plating, oxidation treatment) or the like after the three-dimensional pattern is provided.
[0010]
In the invention according to claim 2, examples of the aggregate include natural stones having a diameter of about 0.1 to 5 mm, resin beads, mica, and the like.
In addition, in the invention of Claim 2, the unevenness | corrugation may be provided in the pressing surface of the roller apparatus.
[0011]
In the invention according to claim 3, examples of the fine aggregate include natural stones having an average diameter of about 0.1 mm, resin beads, mica and the like, and larger aggregates than the fine aggregates include natural stones having an average diameter of about 5 mm. Resin beads, mica and the like.
[0012]
(Function)
In the manufacturing method of the building material of Claim 1, an unevenness | corrugation is provided in the press surface of a roller apparatus, and the same direction as the transfer direction of a coating board body is provided in the contact part with a coating board body in the pressing surface of this roller apparatus. In addition, since it travels at a speed different from the transfer speed of the coated plate body, the unevenness of the pressing surface of the roller device will cause the uncured coating to rub to form a drag pattern, so-called trowel-rubbed pattern Building materials can be produced at the factory.
[0013]
In the building material manufacturing method according to claim 2, the uncured coating film is a mixture of aggregates, and the pressing surface of the roller device is disposed at the contact portion with the painted plate body. Since it travels in the same direction as the transport direction and at a speed different from the transport speed of the coated plate body, the pressing surface of the roller device rubs the aggregate in the uncured coating film and forms a drag pattern, so-called Building materials with a trowel pattern can be produced at the factory.
[0014]
In the building material manufacturing method according to claim 3, since the fine aggregate and the aggregate larger than the fine aggregate are used as the aggregate, the fine aggregate mainly contributes to the thickness of the coating film. However, the pressing surface of the roller device mainly rubs an aggregate larger than the fine aggregate to form a drag pattern, so that a building material with a so-called trowel pattern can be produced at the factory.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
A first embodiment of the present invention will be described with reference to FIGS.
FIG. 1 shows an outline of a method for manufacturing a building material according to the present invention. (A) is an explanatory view showing an example of a manufacturing apparatus, (B) is a perspective view showing a pattern state of the surface of the building material, and FIG. FIG. 3 is a cross-sectional view of a building material produced by this building material production method, and FIG.
In the drawings, 1 is a conveyor, 2 is a coated plate, and 3 is a roller device.
[0016]
On the conveyor 1, a coated plate body 2 having an uncured coating film is placed and moves at a constant speed in the direction of the arrow (right direction in the drawing).
The roller device 3 is configured such that an endless belt 31 made of rubber or the like is rotated around a pressing tool 32 and drive rollers 33 and 33, and is installed above the conveyor 1 and below the endless belt 31. The end surface presses the surface of the coated plate 2 with the coating film being uncured. Although not shown, the outer peripheral surface of the endless belt 31 is provided with unevenness, and this uneven surface is in contact with the surface of the coated plate 2.
[0017]
The endless belt 31 rotates in the same direction as the transfer direction of the conveyor 1 at a portion in contact with the coating plate 2, that is, a portion in contact with the pressing tool 32, and the speed thereof is higher than the transfer speed of the conveyor 1. It is said that. In addition, 34 is a pressing roller, 35 is a scraping plate, and 36 is a cleaning nozzle.
In addition, as a roller apparatus, only one roller other than what is shown in FIG. 1 may be sufficient.
[0018]
As shown in FIG. 2, the coating plate 2 is coated with a paint for patterning on an aluminum plate 21 with a colored coating through a primer 22 for metal plate adhesion and rust prevention. It is formed and is placed and transferred onto the conveyor 1 before the coating film 23 is cured.
[0019]
The coating film 23 (not shown in FIG. 1) on the surface of the coating plate 2 is pressed by the endless belt 31 of the roller device 3, but the contact surface of the coating plate 2 of the endless belt 31 is uneven. Since the belt 1 rotates in the same direction as the transfer direction of the conveyor 1 at a higher speed than that, the convex portion of the endless belt 31 rubs the coating film 23 of the coating plate 2 and rubs. A handle 6 (see FIGS. 1B and 3) is formed.
[0020]
Thereafter, if necessary, a clear coating material 7 such as an acrylic paint, an acrylic silicone paint, a fluorine paint, or an inorganic paint is overcoated on the surface of the coating plate 2 on which the rubbing pattern 6 is formed. The building material as shown in FIG. 3 is manufactured by protecting the top of the membrane.
[0021]
Next, a second embodiment of the present invention will be described with reference to FIGS.
FIG. 4 is a cross-sectional view of a coated plate body in which the coating film used in the method for manufacturing a building material according to the present invention is uncured, and FIG. 5 is a cross-sectional view of the building material manufactured by the method for manufacturing the building material.
[0022]
The manufacturing apparatus used in the second embodiment of the present invention is not particularly different from the apparatus shown in FIG. 1 (a) used in the first embodiment, so reference is made to FIG. 1 (a). .
[0023]
As shown in FIG. 4, the coating plate body 2a is coated with a paint for patterning on an aluminum plate 21a with a colored coating film via a primer 22a for adhesion to the metal plate and for rust prevention. As a fine aggregate in the paint for patterning, a fine aggregate 4 such as natural stone, resin beads, mica, etc. having a diameter of about 0.1 mm to 0.5 mm, and the fine aggregate 4 Also, aggregate 5 such as natural stone having a large diameter of about 2 mm in average, resin beads, and mica is mixed therein.
[0024]
The coating plate 2a is placed and transferred onto the conveyor 1 before the coating 23a is cured.
[0025]
The coating film 23a on the surface of the coating plate 2a is pressed by the endless belt 31 of the roller device 3, but the contact surface of the coating plate 2 of the endless belt 31 is provided with irregularities, and the transport direction of the conveyor 1 Since the convex portion of the endless belt 31 is mainly the large-diameter aggregate 5 in the coating film 23a of the coating plate 2a, the arrow 5 in FIG. Thus, the rubbing pattern 6a is formed by rubbing.
Note that the endless belt 31 of the roller device 3 is a large-diameter aggregate, particularly when the upper end of the large-diameter aggregate 5 is close to or protrudes from the upper layer surface of the coating film 23a of the coating film plate 2a. The endless belt 31 does not need to be provided with irregularities because it is rubbed against the belt 5 by friction.
[0026]
Thereafter, if necessary, the surface of the coating plate 2a on which the rubbing pattern 6a is formed is overcoated with a clear coating material 7a such as acrylic paint, acrylic silicone paint, fluorine paint, or inorganic paint. The building material as shown in FIG. 5 is manufactured by protecting the top of the membrane.
[0027]
In the first and second embodiments, the speed of the endless belt 31 of the roller device 3 is rotated at a speed faster than the transfer speed of the conveyor 1. Good.
[0028]
【The invention's effect】
In the building material manufacturing method according to claim 1, the unevenness of the pressing surface of the roller device forms a drag pattern by rubbing an uncured coating film. It can be produced at the factory.
[0029]
In the building material manufacturing method according to claim 2, the pressing surface of the roller device rubs the aggregate in the uncured coating film to form a drag pattern, and the building material has a so-called trowel-rubbed pattern. Can be produced at the factory.
[0030]
In the method for manufacturing a building material according to claim 3, the fine aggregate mainly contributes to the thickness of the coating film, and the pressing surface of the roller device mainly rubs the aggregate larger than the fine aggregate, A drag pattern will be formed, and building materials with a so-called trowel pattern can be produced at the factory.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 shows an outline of a method for manufacturing a building material according to the present invention, in which (A) is an explanatory view showing an example of a manufacturing apparatus, and (B) is a perspective view showing a pattern state of the surface of the building material.
FIG. 2 is a cross-sectional view of an uncured coated plate body used in the building material manufacturing method of the present invention.
FIG. 3 is a cross-sectional view of a building material manufactured by this building material manufacturing method.
FIG. 4 is a cross-sectional view of an uncured coated plate body used in another form of the building material manufacturing method of the present invention.
FIG. 5 is a cross-sectional view of a building material manufactured according to another embodiment of the method for manufacturing a building material of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Conveyor 2, 2a Paint plate body 3 Roller apparatus 31 Endless belt 4, 5 Aggregate 7 Clear coating material

Claims

Manufacture of building material that forms a patterned coating film on the surface by pressing the uncured coating film on the surface of the coated sheet body with a roller device while the coated sheet is transported on the conveyor. In this method, a plurality of convex portions are provided discontinuously on the pressing surface of the roller device, and the pressing surface of the roller device is arranged in the same direction as the transport direction of the coating plate at the contact portion with the coating plate. In addition, the uncured coating film is rubbed by the convex portions provided on the pressing surface by traveling at a speed different from the transfer speed of the coated plate body, and thus the surface of the painted plate body is not rubbed. A method for producing a building material, comprising forming a continuous rubbing pattern .

Manufacture of building material that forms a patterned coating film on the surface by pressing the uncured coating film on the surface of the coated sheet body with a roller device while the coated sheet is transported on the conveyor. In this method, the uncured coating film is a mixture of aggregate, and the pressing surface of the roller device is in the same direction as the transport direction of the coated plate body at the contact portion with the painted plate body, and the painted plate By running at a speed different from the body transfer speed, the aggregate mixed in the uncured coating film is rubbed with the pressing surface, whereby a discontinuous rubbing pattern is formed on the surface of the coated plate body. A method for manufacturing a building material, characterized in that it is formed .

The method for manufacturing a building material according to claim 2, wherein a fine aggregate and an aggregate larger than the fine aggregate are used as the aggregate.