JP2007029913A - Coating method - Google Patents

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JP2007029913A
JP2007029913A JP2005220029A JP2005220029A JP2007029913A JP 2007029913 A JP2007029913 A JP 2007029913A JP 2005220029 A JP2005220029 A JP 2005220029A JP 2005220029 A JP2005220029 A JP 2005220029A JP 2007029913 A JP2007029913 A JP 2007029913A
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coating
coated
paint
coating method
pattern
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JP4739850B2 (en
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Masatoshi Tanaka
正敏 田中
Atsuhisa Fujisawa
▲あつ▼久 藤澤
Mutsuo Nagira
睦男 柳楽
Shigeyuki Abe
繁行 安部
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Kansai Paint Co Ltd
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Kansai Paint Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a coating method eliminating a repair process by making it difficult to visually identify an external appearance defect or the like of a coated surface for a heavy equipment, a farm equipment or the like such as a power shovel and a forklift, that is, an object to be coated having a base metal defect on a surface of a casted base metal in orange-peel form, or the like. <P>SOLUTION: The coating method comprises the steps of: applying a primer coating to a surface of the object to be coated having a base metal defect; then applying a protrusion/recess pattern coating onto the coated surface using a pigmented coating (A); and further applying a multi-color pattern coating in spots onto the coated surface using two or more colors of pigmented coatings (B). <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、パワーシャベル、フォークリフトなどの重機や農機など、ユズ膚状の鋳物素地面などの素地欠陥を有する被塗物に対し、塗装面の外観不良等を視認し難くすることによって補修工程を採る必要のない塗装方法に関する。   The present invention provides a repair process by making it difficult to visually recognize defects in the appearance of the painted surface, etc. on coated objects having ground defects, such as heavy-duty machines such as power shovels and forklifts, and agricultural machinery. It relates to painting methods that do not need to be taken.

従来、パワーシャベルやフォークリフトなどの重機や農機などに用いられている鋳物製品の塗装は、鋳物素地面がユズ膚で、また巣穴からのガス発生等があるので、形成する上塗り塗膜の塗膜外観を良好にするためには、素地面の必要箇所にパテ付けをし、次いで全面にプライマー塗装を行った後、さらにパテ付けやスプレーパテ塗装を行なってから、研磨し、上塗り塗装を行なっており、非常に煩雑であった。そこで特許文献1では、鋳物表面にプライマー塗装を行なった後、その上に斑点状に凸模様塗装をし、さらにその凸模様塗装部及び未塗装部に上塗り塗料を均一に塗装する方法が提案されている。この方法では、鋳物表面になだらかな凹凸模様を形成することで、ユズ膚の素地面による影響を目立たなくすることができ、スプレーパテ塗装工程や研磨工程を省略することが可能となった。   Conventionally, casting products used in heavy machinery such as power shovels and forklifts and agricultural machinery are coated with a top coat film because the ground surface of the casting is crusty and gas is generated from the burrow. In order to improve the appearance of the film, putty is put on the necessary part of the ground surface, and then primer coating is applied to the entire surface, then further puttying and spraying putty coating is applied, followed by polishing and top coating. It was very cumbersome. Therefore, Patent Document 1 proposes a method in which a primer coating is applied to the casting surface, and then a convex pattern coating is applied on the casting surface, and a top coating is uniformly applied to the convex pattern coating portion and the unpainted portion. ing. In this method, by forming a gentle concavo-convex pattern on the casting surface, it is possible to obscure the influence of the ground surface of the yuzu skin, and it is possible to omit the spray putty coating process and the polishing process.

特開2004−33942号公報JP 2004-33942 A

しかしながら上記方法では、凸模様塗装に使用する塗料や上塗り塗料の塗布量が少ないと、素地欠陥による塗装面の外観不良が十分に隠蔽できなくなる場合があった。   However, in the above method, if the coating amount of the paint or top coating used for the convex pattern coating is small, the appearance defect of the painted surface due to the substrate defect may not be sufficiently concealed.

また塗装ラインでは、特に素地欠陥により塗装面に目立った外観不良が生じた被塗物については塗装後にラインから除外し、補修スペースで補修塗装を行い、塗装面の外観不良を補修する必要があった。補修塗装は、当該部分にパテ付け後、プライマー塗装し、さらに上塗り塗装を行なうというものであり、多大な工数を要するだけでなく、リードタイムが長くなり生産性を低下させるという問題があった。   Also, in the painting line, it is necessary to remove the coated objects that have noticeably deteriorated appearance on the painted surface due to substrate defects, to remove them from the line after painting, and to repair the painted surface by repairing in the repair space. It was. The repair coating involves putting a part on the part, then applying a primer, and further performing a top coating, which not only requires a large number of man-hours, but also has a problem that the lead time is increased and the productivity is lowered.

本発明の目的は、ユズ膚状の鋳物素地面のような素地欠陥を有する被塗物に対し、塗膜性能を低下させることなく、塗装面の外観不良等を視認し難くすることによって補修工程を採る必要のない塗装方法を提供することにある。   The object of the present invention is to repair a coated object having a substrate defect such as a yuzu-skin cast substrate by making it difficult to visually recognize the appearance defect of the painted surface without deteriorating the coating film performance. The object is to provide a painting method that does not need to be applied.

本発明は、
1.素地欠陥を有する被塗物の表面に、プライマー塗装を行い、次いでその塗面上に着色塗料(A)を用いた凹凸模様塗装を行い、さらにその上に2色以上の着色塗料(B)を用いた斑点状の多色模様塗装を行なうことを特徴とする塗装方法、
2.着色塗料(A)の塗布量が、50〜300g/mである1項記載の塗装方法、
3.凹凸模様の平均高さ(平均深さ)が3.0μm以上である1項記載の塗装方法、
4.2色以上の着色塗料(B)の全塗布量が、5〜30g/mである1項記載の塗装方法、
5.少なくとも2色の着色塗料(B)によって形成される各斑点模様が、明度差50以上、色相差36以上、及び彩度の差が60以上の少なくとも一つの条件を満たすものである1項記載の塗装方法、
6.被塗物が、鋳物製である1項記載の塗装方法、
7.1ないし6のいずれか1項に記載の塗装方法によって得られる塗装物品、
に関する。
The present invention
1. Primer coating is performed on the surface of the object to be coated with substrate defects, and then a concavo-convex pattern coating using a colored paint (A) is performed on the coated surface, and two or more colored paints (B) are further coated thereon. A coating method characterized by performing a spotted multicolor pattern coating,
2. The coating method according to 1, wherein the coating amount of the colored paint (A) is 50 to 300 g / m 2 .
3. 2. The coating method according to 1, wherein the uneven pattern has an average height (average depth) of 3.0 μm or more.
4. The coating method according to 1, wherein the total coating amount of the colored paint (B) having two or more colors is 5 to 30 g / m 2 ;
5. Item 2. The spot pattern formed by at least two colored paints (B) satisfies at least one condition of a lightness difference of 50 or more, a hue difference of 36 or more, and a saturation difference of 60 or more. Painting method,
6). The coating method according to claim 1, wherein the object to be coated is made of a casting.
7.1 A coated article obtained by the coating method according to any one of 1 to 6,
About.

本発明では、被塗物面に凹凸模様塗装を行なった後、その上に2色以上の多色模様塗装を行なうことによって、素地欠陥を有する被塗物であっても、また使用塗料の塗布量が少なくても、模様の凹凸に起因する濃淡や多彩模様の色彩によって素地欠陥に伴う塗装面の外観不良が視認しにくくなり(目立たなくなり)、連続ラインから塗装物を除外する必要がなくなるという効果を有する。従って本発明方法によれば、意匠性に優れた塗膜が形成できるだけでなく、塗料の使用量や補修作業を軽減でき、塗装ラインにおける生産性を高めることが可能である。   In the present invention, after applying a concavo-convex pattern on the surface of the object to be coated, by applying a multicolor pattern of two or more colors on the surface, it is possible to apply the paint to be used even if the object has a substrate defect. Even if the amount is small, it is difficult to see the appearance defect of the painted surface due to the substrate defect due to the shading and colorful pattern color caused by the unevenness of the pattern (it becomes inconspicuous), and it is not necessary to exclude the paint from the continuous line Has an effect. Therefore, according to the method of the present invention, not only a coating film excellent in design can be formed, but also the amount of paint used and the repair work can be reduced, and the productivity in the coating line can be increased.

以下、本発明の好適な実施の形態を説明する。図1は本発明の塗装方法を説明する断面図である。   Hereinafter, preferred embodiments of the present invention will be described. FIG. 1 is a cross-sectional view illustrating the coating method of the present invention.

本発明において被塗物面としては、例えば金属面、コンクリート面、スレート面、プラスチック面などの素材面にユズ膚、キズなどの素地欠陥を有するものが挙げられ、これらは必要に応じて表面処理されていても良い。特に本発明では、被塗物が鋳物製である場合などには、その素地欠陥に伴う塗装面の外観不良を視認しにくくできるので好適である。該鋳物面は、必要に応じてブラストやパテ付けを行なっておいても良い。   In the present invention, the surface to be coated includes, for example, a material surface such as a metal surface, a concrete surface, a slate surface, a plastic surface, or the like, which has a substrate defect such as scratches or scratches. May be. In particular, in the present invention, when the object to be coated is made of a casting, it is preferable because it is difficult to visually recognize the appearance defect of the painted surface due to the substrate defect. The casting surface may be blasted or putted if necessary.

本発明方法では、上記被塗物面にプライマー塗装を均一に行なう。該プライマーとしては、水系又は有機溶剤系のいずれであっても良く、例えばポリエステル樹脂系プライマー、エポキシ樹脂系プライマー、フェノール樹脂系プライマーなどが挙げられ、これらのうち特にエポキシ樹脂系プライマーが好適である。   In the method of the present invention, primer coating is uniformly performed on the surface of the object to be coated. The primer may be either water-based or organic solvent-based, for example, a polyester resin-based primer, an epoxy resin-based primer, a phenol resin-based primer, etc. Among them, an epoxy resin-based primer is particularly preferable. .

上記プライマーは、通常、スプレー塗装されるものであり、その塗布量は、特に限定されるものではないが、通常、100〜200g/m、好ましくは150〜200g/m程度であることが塗膜性能の点から好ましい。形成されるプライマー塗膜の乾燥条件は、使用されるプライマーの種類によって適宜選択可能である。 The primer is usually intended to be spray coating, the coating amount is not particularly limited, usually, 100 to 200 g / m 2, it is preferably 150 to 200 g / m 2 approximately It is preferable from the viewpoint of coating film performance. The drying conditions of the primer coating film to be formed can be appropriately selected depending on the type of primer used.

本発明では、上記の通り形成されたプライマー塗面上に、着色塗料(A)を用いた凹凸模様塗装を行なう。該着色塗料(A)としては、水系又は有機溶剤系のいずれであっても良く、通常、樹脂成分、着色顔料、塗料用添加剤などを含有するものである。樹脂成分としては、例えばアルキド樹脂系、ポリエステル樹脂系、シリコーン樹脂系、フッ素樹脂系、エポキシ樹脂系、ウレタン樹脂系、アクリル樹脂系及びこれらの変性樹脂を基体樹脂とし、必要に応じてメラミン樹脂、(ブロック)ポリイソシアネートなどの硬化剤を配合するものが挙げられ、これらのうち特にウレタン樹脂系が好適である。着色顔料としては、通常の塗料用の無彩色及び有彩色の有機系又は無機系のソリッドカラー顔料、さらにはメタリック顔料、光干渉性顔料などが挙げられる。   In this invention, the uneven | corrugated pattern coating using a colored coating material (A) is performed on the primer coating surface formed as mentioned above. The colored paint (A) may be either water-based or organic solvent-based, and usually contains a resin component, a color pigment, a paint additive, and the like. Examples of the resin component include alkyd resins, polyester resins, silicone resins, fluororesins, epoxy resins, urethane resins, acrylic resins, and modified resins as base resins, and if necessary, melamine resins, (Block) The thing which mix | blends hardening | curing agents, such as polyisocyanate, is mentioned, Among these, a urethane resin system is especially suitable. Examples of the color pigment include achromatic and chromatic organic or inorganic solid color pigments for ordinary paints, metallic pigments, and light interference pigments.

上記着色塗料(A)を用いた凹凸模様塗装は、通常、スプレー塗装(多ノズルガン含む)されるものであり、その塗布量は、特に限定されるものではないが、通常、50〜300g/m、好ましくは120〜300g/m程度であることが下層塗膜の完全隠蔽の点から好ましい。形成される凹凸模様塗膜の乾燥条件は、使用される着色塗料の種類によって適宜選択可能である。 The concavo-convex pattern coating using the colored paint (A) is usually spray-coated (including a multi-nozzle gun), and the coating amount is not particularly limited, but is usually 50 to 300 g / m. 2 and preferably about 120 to 300 g / m 2 from the viewpoint of complete hiding of the lower layer coating film. The drying conditions of the concavo-convex pattern coating film to be formed can be appropriately selected depending on the type of the color paint used.

上記塗装によって得られる凹凸模様は、凹凸面の平均高さ(平均深さ)が3.0μm以上、好ましくは4.0〜10μmであることが、塗膜不良を隠蔽する視覚効果の点から好適である。ここで凹凸面の平均高さ(深さ)とは、算術平均粗さRa=(1/L)∫f(x)dx(粗さ曲線Y=f(x)・平均線方向の長さ:L)である。   The uneven pattern obtained by the above coating preferably has an average height (average depth) of the uneven surface of 3.0 μm or more, preferably 4.0 to 10 μm from the viewpoint of the visual effect of concealing coating film defects. It is. Here, the average height (depth) of the uneven surface is the arithmetic average roughness Ra = (1 / L) ∫f (x) dx (roughness curve Y = f (x) · length in the average line direction: L).

本発明方法では、上記塗装によって得られた凹凸模様面上に、2色以上の着色塗料(B)を用いた斑点状の多色模様塗装を行なう。該着色塗料(B)としては、水系又は有機溶剤系のいずれであっても良く、通常、樹脂成分、着色顔料、塗料用添加剤などを含有するものである。樹脂成分としては、例えばアルキド樹脂系、ポリエステル樹脂系、シリコーン樹脂系、フッ素樹脂系、エポキシ樹脂系、ウレタン樹脂系、アクリル樹脂系及びこれらの変性樹脂を基体樹脂とし、必要に応じてメラミン樹脂、(ブロック)ポリイソシアネートなどの硬化剤を配合するものが挙げられ、これらのうち特にウレタン樹脂系が好適である。着色顔料としては、通常の塗料用の無彩色及び有彩色の有機系又は無機系のソリッドカラー顔料、さらにはメタリック顔料、光干渉性顔料などが挙げられる。   In the method of the present invention, a spot-like multicolor pattern coating using two or more colored paints (B) is performed on the concavo-convex pattern surface obtained by the above coating. The colored paint (B) may be either water-based or organic solvent-based, and usually contains a resin component, a color pigment, paint additives, and the like. Examples of the resin component include alkyd resins, polyester resins, silicone resins, fluororesins, epoxy resins, urethane resins, acrylic resins, and modified resins as base resins, and if necessary, melamine resins, (Block) The thing which mix | blends hardening | curing agents, such as polyisocyanate, is mentioned, Among these, urethane resin system is especially suitable. Examples of the color pigment include achromatic and chromatic organic or inorganic solid color pigments for ordinary paints, metallic pigments, and light interference pigments.

本発明において多色模様は、2色以上の着色塗料によって形成される単色粒子部分及び混色部分を有する模様であり、特に2色以上の着色塗料を同時に塗装して形成されるものである。使用する2色以上の着色塗料は、その少なくとも2色の着色塗料が、(1)明度差が50以上、好ましくは60以上、(2)色相の差が36以上、好ましくは45以上、(3)彩度の差が60以上、好ましくは70以上、の少なくとも一つの条件を満たすものであることが模様形成、塗膜不良を隠蔽する視覚効果の点から望ましい。   In the present invention, a multicolor pattern is a pattern having a monochromatic particle portion and a mixed color portion formed by two or more colored paints, and is particularly formed by simultaneously applying two or more colored paints. The two or more color paints to be used are (1) a lightness difference of 50 or more, preferably 60 or more, and (2) a hue difference of 36 or more, preferably 45 or more. ) It is desirable from the viewpoint of the visual effect to conceal pattern formation and coating film defect that the difference in saturation is at least one condition of 60 or more, preferably 70 or more.

該多色模様塗膜は、被塗面上に、例えばスプレー等従来公知の手段によって形成され、特に塗料吐出ノズルを2個以上有する多ノズルスプレーガン(例えば特開平9−299833号公報参照)等を用いて形成されるのが好適である。上記塗料吐出ノズルを2個以上有するスプレーガンを用いて、被塗面上に多色模様を形成する場合には、該各吐出ノズルを被塗面に向けて、該スプレーガンの少なくとも2個以上の吐出ノズルから互いに異なる塗色の塗料を吐出させるのが適当である。該スプレーガンにおいては、各塗料吐出ノズルの配置を換えることにより塗料粒子の混色程度を調節することができる。該塗料の単色粒子部分及び混色粒子部分の混在程度は、多色模様塗膜が形成できる範囲内において、目的とする模様に応じて決定すればよく、塗料粘度、塗料の吐出量などの塗装条件などを適宜調整することによって調節できる。塗装時の塗料の粘度は、通常、0.10〜0.50Pa・secの範囲内にあることが適当である。また塗料の霧化エア流量は、通常、120〜190Nリットル/minの範囲内にあり、パターンエア流量は、通常、100〜160Nリットル/minの範囲内にあることが適当である。   The multicolor pattern coating film is formed on the surface to be coated by a conventionally known means such as spray, and in particular, a multi-nozzle spray gun having two or more paint discharge nozzles (see, for example, JP-A-9-299833), etc. It is suitable to form using. When a multicolor pattern is formed on the surface to be coated using a spray gun having two or more paint discharge nozzles, at least two or more spray guns are directed toward the surface to be coated. It is appropriate to discharge paints of different paint colors from these discharge nozzles. In the spray gun, the color mixture degree of the paint particles can be adjusted by changing the arrangement of the paint discharge nozzles. The mixing degree of the monochromatic particle portion and the mixed color particle portion of the paint may be determined according to the target pattern within a range where a multicolor pattern coating film can be formed, and the coating conditions such as the paint viscosity and the discharge amount of the paint. Etc. can be adjusted by adjusting appropriately. The viscosity of the paint at the time of painting is usually suitably in the range of 0.10 to 0.50 Pa · sec. The atomizing air flow rate of the paint is usually in the range of 120 to 190 N liter / min, and the pattern air flow rate is usually in the range of 100 to 160 N liter / min.

上記2色以上の着色塗料(B)の全塗布量は、特に限定されるものではないが、通常、5〜30g/m、好ましくは10〜30g/m程度であることが模様形成の点から好ましい。形成される多色模様塗膜の乾燥条件は、使用される着色塗料の種類によって適宜選択可能である。 The total coating amount of the two or more colored paints (B) is not particularly limited, but is usually 5 to 30 g / m 2 , preferably about 10 to 30 g / m 2 for pattern formation. It is preferable from the point. The drying conditions of the formed multicolor pattern coating film can be appropriately selected depending on the type of the color paint used.

上記の通り形成される多色模様塗膜は下層である凹凸模様塗膜面を完全に隠蔽しても良いし、しなくとも良い。   The multicolor pattern coating film formed as described above may or may not completely cover the concave-convex pattern coating film surface.

以下、実施例を挙げて本発明をさらに詳細に説明する。尚、「部」及び「%」は、別記しない限り「重量部」及び「重量%」を示す。   Hereinafter, the present invention will be described in more detail with reference to examples. “Part” and “%” indicate “part by weight” and “% by weight” unless otherwise specified.

実施例1
鋳物板上に、「ラスタイトNC70」(関西ペイント社製、ウレタン樹脂系プライマー)を塗装粘度が0.26Pa・secとなるように粘調して、塗布量150g/mとなるようにスプレー塗装し、20℃で10分間乾燥させた後、次いで「レタンPG80イエロー」(関西ペイント社製、アクリルウレタン塗料)(「(イ)」とする)を塗装粘度が0.26Pa・secとなるように粘調して、塗布量150g/mとなるように、アネスト岩田W−100−152(塗装圧送機器)を用いてガンエア圧:0.5Kg、吐出エア圧:4.0Kg、霧化ノズル:2回転、エアノズル:2回転の条件にて凹凸模様となるようスプレー塗装し、20℃で30分間乾燥させた。さらにその上に「レタンPG80レッド」(関西ペイント社製、アクリルウレタン塗料)(「(ロ)」とする)と「レタンPG80ブルー」(関西ペイント社製、アクリルウレタン塗料)(「(ハ)」とする)を夫々塗装粘度が0.16Pa・secとなるように粘調して、夫々塗布量8.0g/mとなるように、塗料吐出ノズルを4個有する多ノズルスプレーガン(ノズル口径:1.5mmφ)を用いて霧化エア流量170Nリットル/min、パターンエア流量140Nリットル/minの条件にて多色模様となるようスプレー塗装し、20℃で30分間乾燥させて図2のような断面を有する塗装板を得た。
Example 1
Viscosity of “Lastite NC70” (manufactured by Kansai Paint Co., Ltd., urethane resin primer) on the casting plate so that the coating viscosity is 0.26 Pa · sec, and spray coating is performed so that the coating amount is 150 g / m 2. After drying at 20 ° C. for 10 minutes, “Letane PG80 Yellow” (manufactured by Kansai Paint Co., Ltd., acrylic urethane paint) (referred to as “(I)”) was applied so that the coating viscosity was 0.26 Pa · sec. and viscous, so that the coating amount 150 g / m 2, Gun pressure using IWATA W-100-152 (paint pumping equipment): 0.5 Kg, the discharge air pressure: 4.0 Kg, atomizing nozzles: 2 rotations, air nozzle: Spray coating was applied to form a concavo-convex pattern under the conditions of 2 rotations and dried at 20 ° C. for 30 minutes. Furthermore, “Letan PG80 Red” (acrylic urethane paint by Kansai Paint Co., Ltd.) (referred to as “(B)”) and “Letane PG80 Blue” (acrylic urethane paint by Kansai Paint Co., Ltd.) (“(C)” Multi-nozzle spray guns (nozzle caliber) having four coating nozzles so that the coating viscosity is 0.16 Pa · sec and the coating amount is 8.0 g / m 2. : 1.5mmφ), spray coating is applied to form a multicolor pattern under the conditions of an atomizing air flow rate of 170 Nl / min and a pattern air flow rate of 140 Nl / min, and dried at 20 ° C for 30 minutes, as shown in FIG. A painted plate having a proper cross section was obtained.

実施例2〜7および比較例1〜3
実施例1において、凹凸模様塗装条件及び多色模様塗装条件を表1及び表2の通りとする以外は実施例1と同様に行なって、図2及び図3に示すような断面を有する各塗装板を得た。尚、表中、塗料(二)として、「レタンPG80クリーム」(関西ペイント社製、アクリルウレタン塗料)を使用した。
Examples 2-7 and Comparative Examples 1-3
In Example 1, except that the uneven pattern coating conditions and the multicolor pattern coating conditions are as shown in Tables 1 and 2, each coating having the cross section shown in FIGS. 2 and 3 is performed in the same manner as in Example 1. I got a plate. In the table, “Letane PG80 Cream” (manufactured by Kansai Paint Co., Ltd., acrylic urethane paint) was used as the paint (2).

得られた各塗装板について、素地欠陥に基づく塗膜不良の隠蔽効果を、目視観察により下記基準で評価した。   About each obtained coating board, the concealment effect of the coating-film defect based on a substrate defect was evaluated on the following reference | standard by visual observation.

○:塗膜不良の隠蔽効果が大きく、不良部分が殆ど視認できない
△:塗膜不良の隠蔽効果は中程度で、不良部分が角度によっては視認できる
×:塗膜不良の隠蔽効果が小さく、不良部分が視認できる。
○: Concealing effect of coating film failure is large and the defective part is hardly visible Δ: Concealing effect of coating film defect is moderate, and defective part can be viewed depending on the angle ×: Concealing effect of coating film defect is small and defective The part is visible.

比較例4
鋳物板上に、「ラスタイトNC70」(関西ペイント社製、ウレタン樹脂系プライマー)を塗装粘度が0.26Pa・secとなるように粘調して、塗布量150g/mとなるようにスプレー塗装し、20℃で10分間乾燥させた後、次いで「レタンPG80イエロー」(関西ペイント社製、アクリルウレタン塗料)を塗装粘度が0.26Pa・secとなるように粘調して、塗布量150g/mとなるように、アネスト岩田W−100−152(塗装圧送機器)を用いてガンエア圧:0.25Kg、吐出エア圧:4.0Kg、霧化ノズル:2回転、エアノズル:2回転の条件にて凸模様となるようスプレー塗装し、20℃で30分間乾燥させた。さらにその上に「レタンPG80クリーム」(関西ペイント社製、アクリルウレタン塗料)を塗装粘度が0.26Pa・secとなるように粘調して、塗布量150g/mとなるように、アネスト岩田W−100−152(塗装圧送機器)を用いてガンエア圧:0.5Kg、吐出エア圧:4.0Kg、霧化ノズル:2回転、エアノズル:2回転の条件にて均一塗膜となるようスプレー塗装し、20℃で30分間乾燥させて、図4のような断面を有する塗装板を得た。
Comparative Example 4
Viscosity of “Lastite NC70” (manufactured by Kansai Paint Co., Ltd., urethane resin primer) on the casting plate so that the coating viscosity is 0.26 Pa · sec, and spray coating is performed so that the coating amount is 150 g / m 2. Then, after drying at 20 ° C. for 10 minutes, “Letane PG80 Yellow” (manufactured by Kansai Paint Co., Ltd., acrylic urethane paint) was adjusted so that the coating viscosity was 0.26 Pa · sec. as will be m 2, Gun using IWATA W-100-152 (paint pumping equipment) pressure: 0.25 kg, the discharge air pressure: 4.0 Kg, atomizing nozzle: 2 rotates, air nozzles: 2 rotation conditions And spray-coated to form a convex pattern, and dried at 20 ° C. for 30 minutes. Furthermore, “Letane PG80 cream” (manufactured by Kansai Paint Co., Ltd., acrylic urethane paint) is adjusted so that the coating viscosity is 0.26 Pa · sec, and the application amount is 150 g / m 2 , Anest Iwata Spray using W-100-152 (coating pressure feeding device) to form a uniform coating film under the conditions of gun air pressure: 0.5 kg, discharge air pressure: 4.0 kg, atomizing nozzle: 2 rotations, and air nozzle: 2 rotations. It was painted and dried at 20 ° C. for 30 minutes to obtain a coated plate having a cross section as shown in FIG.

得られた塗装板について、素地欠陥に基づく塗膜不良の隠蔽効果を、目視観察により上記基準で評価したところ、△であった。   About the obtained coating board, it was (triangle | delta), when the concealment effect of the coating-film defect based on a substrate defect was evaluated on the said reference | standard by visual observation.

Figure 2007029913
Figure 2007029913

Figure 2007029913
Figure 2007029913

本発明の塗装方法を説明する断面図である。It is sectional drawing explaining the coating method of this invention. 実施例1〜7の塗装板の断面図である。It is sectional drawing of the coating board of Examples 1-7. 比較例1〜3の塗装板の断面図である。It is sectional drawing of the coating board of Comparative Examples 1-3. 比較例4の塗装板の断面図である。It is sectional drawing of the coating board of the comparative example 4.

Claims (7)

素地欠陥を有する被塗物の表面に、プライマー塗装を行い、次いでその塗面上に着色塗料(A)を用いた凹凸模様塗装を行い、さらにその上に2色以上の着色塗料(B)を用いた斑点状の多色模様塗装を行なうことを特徴とする塗装方法。 Primer coating is performed on the surface of the object to be coated with substrate defects, and then a concavo-convex pattern coating using a colored paint (A) is performed on the coated surface, and two or more colored paints (B) are further coated thereon. A coating method characterized by performing a spotted multicolor pattern coating. 着色塗料(A)の塗布量が、50〜300g/mである請求項1記載の塗装方法。 The coating method according to claim 1, wherein the coating amount of the colored paint (A) is 50 to 300 g / m 2 . 凹凸模様の平均高さ(平均深さ)が3.0μm以上である請求項1記載の塗装方法。 The coating method according to claim 1, wherein the uneven pattern has an average height (average depth) of 3.0 μm or more. 2色以上の着色塗料(B)の全塗布量が、5〜30g/mである請求項1記載の塗装方法。 The coating method according to claim 1, wherein the total coating amount of the two or more colored paints (B) is 5 to 30 g / m 2 . 少なくとも2色の着色塗料(B)によって形成される各斑点模様が、明度差50以上、色相差36以上、及び彩度の差が60以上の少なくとも一つの条件を満たすものである請求項1記載の塗装方法。 2. Each spot pattern formed by at least two colored paints (B) satisfies at least one condition of a lightness difference of 50 or more, a hue difference of 36 or more, and a saturation difference of 60 or more. Painting method. 被塗物が、鋳物製である請求項1記載の塗装方法。 The coating method according to claim 1, wherein the article to be coated is made of a casting. 請求項1ないし6のいずれか1項に記載の塗装方法によって得られる塗装物品。

The coated article obtained by the coating method of any one of Claim 1 thru | or 6.

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