JPH0651172B2 - Painting method - Google Patents

Painting method

Info

Publication number
JPH0651172B2
JPH0651172B2 JP12041386A JP12041386A JPH0651172B2 JP H0651172 B2 JPH0651172 B2 JP H0651172B2 JP 12041386 A JP12041386 A JP 12041386A JP 12041386 A JP12041386 A JP 12041386A JP H0651172 B2 JPH0651172 B2 JP H0651172B2
Authority
JP
Japan
Prior art keywords
coating
water
coating film
film
electrodeposition
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP12041386A
Other languages
Japanese (ja)
Other versions
JPS62277185A (en
Inventor
秋夫 村松
英紀 山下
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzuki Motor Co Ltd
Original Assignee
Suzuki Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Suzuki Motor Co Ltd filed Critical Suzuki Motor Co Ltd
Priority to JP12041386A priority Critical patent/JPH0651172B2/en
Publication of JPS62277185A publication Critical patent/JPS62277185A/en
Publication of JPH0651172B2 publication Critical patent/JPH0651172B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【発明の詳細な説明】 a. 産業上の利用分野 本発明は、塗装方法に関する。DETAILED DESCRIPTION OF THE INVENTION a. Field of Industrial Application The present invention relates to a coating method.

b. 従来の技術とその問題点 従来、自動車のボディ塗装などには、コンベンショナル
な電着塗装の他に、予めボディ外周面に粉体塗装等を施
した後に電着塗装を行なう、いわゆるリバース塗装法が
採用されている。この塗装法によると、ボディ外周面に
は粉体塗料が付着して電気的抵抗が大きくなるために、
電着塗料はボディ外周面に付着せずに、例えばサイドシ
ール等の袋内部に付着し、つきまわり性の向上を図るこ
とができる。
b. Conventional technology and its problems Conventionally, in the body painting of automobiles, in addition to conventional electrodeposition coating, so-called reverse coating, in which powder coating is applied to the outer peripheral surface of the body in advance and then electrodeposition coating is performed. The law has been adopted. According to this coating method, powder coating adheres to the outer peripheral surface of the body to increase electrical resistance,
The electrodeposition paint does not adhere to the outer peripheral surface of the body but adheres to the inside of a bag such as a side seal, thereby improving throwing power.

しかし、上記リバース塗装法は、粉体塗装部と電着塗装
部との境界部において膜厚が不均一となり、かつ薄膜と
なって防錆力が低下する。このため、粉体塗料に導電性
をもたせたり、電着塗料のフロー性を良くするなどして
境界面をカバーしているが、いずれも外観および塗膜性
能の点で劣る。
However, in the above reverse coating method, the film thickness becomes non-uniform at the boundary between the powder coating part and the electrodeposition coating part, and a thin film is formed, and the rust preventive power is lowered. For this reason, the boundary surface is covered by providing the powder coating material with conductivity or improving the flowability of the electrodeposition coating material, but both are inferior in appearance and coating film performance.

また、ボディ外周面の塗膜は硬い粉体塗膜であることか
ら、塗装肌が悪く、良好な外観が得られないとともに、
水研ぎ作業が煩雑となって作業性に問題があった。
Further, since the coating film on the outer peripheral surface of the body is a hard powder coating film, the coating surface is poor and a good appearance cannot be obtained.
There was a problem in workability due to complicated water polishing work.

さらに、前処理水切炉における水切りは、完全に行なわ
なければならないし、粉体塗膜を焼き付けるための焼付
炉が必要となり、エネルギー消費量が増大してコスト高
になるという問題があった。
Further, draining in the pretreatment draining furnace must be completely performed, and a baking furnace for baking the powder coating film is required, which causes a problem that energy consumption increases and cost increases.

そこで、電着塗装したのち、塗膜の予備加熱を行ってか
ら水溶性塗料を用いて浸漬塗装を行う方法がある。
Therefore, there is a method in which after electrodeposition coating, the coating film is preheated and then dip coating is performed using a water-soluble coating material.

しかし、この方法では、塗装の膜厚を均一にすることが
困難であり、また塗料の次工程への持ち出し量が多い。
さらに、液溜まりが発生するため、ネジ穴等をマスキン
グすることが必要であり、また塗装用ハンガーの汚れが
ひどいなどの欠点があった。
However, with this method, it is difficult to make the coating film thickness uniform, and the amount of paint taken out to the next step is large.
Further, since liquid pools are generated, it is necessary to mask the screw holes and the like, and there are drawbacks such that the coating hanger is extremely dirty.

本発明はこのような実状に鑑みてなされたものであっ
て、その目的は、上述の如き問題点を解消し得る塗装方
法を提供することにある。
The present invention has been made in view of such circumstances, and an object thereof is to provide a coating method capable of solving the above-mentioned problems.

c. 問題点を解決するための手段 上記従来技術の有する問題点を解決するために、本発明
は、前処理した被塗物の表面に電着塗料を付着させて塗
膜を形成し、水洗いした後、前記被塗物に熱水および/
または蒸気雰囲気処理を施して前記塗膜を固定し、その
のち水溶性塗料により浸漬塗装して水洗することを特徴
とする塗装方法を提供するものである。
c. Means for Solving Problems In order to solve the problems of the above-mentioned prior art, the present invention forms a coating film by adhering an electrodeposition paint to the surface of a pretreated object, and washing with water. And then apply hot water and / or
Alternatively, the present invention provides a coating method characterized by subjecting the coating film to a steam atmosphere treatment to fix the coating film, followed by dip coating with a water-soluble paint and washing with water.

上記熱水および/または蒸気雰囲気処理により電着塗膜
を固定する方法としては、60〜100 ℃の熱水および/ま
たは蒸気雰囲気によって1〜3分エージングし、電着塗
膜をプレキュアせしめる方法である。
As a method of fixing the electrodeposition coating film by the hot water and / or steam atmosphere treatment, a method of pre-curing the electrodeposition coating film by aging for 1 to 3 minutes with a hot water and / or steam atmosphere of 60 to 100 ° C. is there.

また上記水溶性塗料は、塗膜形成基材となる水性樹脂の
水溶液中に、被塗物を浸漬することによって、溶液中の
薬品、例えばリン酸が被塗物と反応し、その時被塗物よ
り溶出した金属イオンによって水性樹脂が被塗物の表面
に凝析され塗膜を形成するもの、または金属と配位結合
してキレート化合物を形成する高分子化合物を含有する
ものが好ましい。例えば、日本ペイント(株)製のAPコー
ト(商品名)である。なお、上記水溶性塗料は、エマル
ジョン形のものも含まれる。
Further, the above water-soluble coating material is obtained by immersing an article to be coated in an aqueous solution of an aqueous resin as a coating film-forming substrate, whereby a chemical in the solution, such as phosphoric acid, reacts with the article to be coated, It is preferable that the aqueous resin coagulates on the surface of the article to be coated by the more eluted metal ions to form a coating film, or that the polymer compound contains a polymer compound that forms a chelate compound by coordinate bond with a metal. For example, an AP coat (trade name) manufactured by Nippon Paint Co., Ltd. The water-soluble paint also includes emulsion type paints.

d. 実施例 以下、本発明を図示の実施例に基づいて詳細に説明す
る。
d. Examples Hereinafter, the present invention will be described in detail based on illustrated examples.

実施例 まず、第2図に示すように、2枚の冷却圧延鋼板1、2
を、厚さ200 μmのスペーサー3、4を挟んで5、6、
7、8の個所にスポット溶接して、塗装用試料9を作製
した。
Example First, as shown in FIG. 2, two cold-rolled steel plates 1, 2 were used.
With spacers 3 and 4 of thickness 200 μm sandwiched between them
A coating sample 9 was prepared by spot welding at points 7 and 8.

この塗装用試料9に、第1図に示すフローチャートにし
たがって、まず化成処理を施して前処理を行なった。次
いで、常法によって電着塗装を行ない、電着塗料を付着
させて塗膜を形成せしめる。
According to the flowchart shown in FIG. 1, the coating sample 9 was first subjected to chemical conversion treatment and pretreatment. Then, electrodeposition coating is carried out by a conventional method, and an electrodeposition coating material is attached to form a coating film.

上記塗装用試料を水洗いしたのち、60〜100 ℃の熱水に
よって1〜3分間熱処理(エイジング)を行ない、塗装
用試料の表面に形成された塗膜を固定した。
After the above coating sample was washed with water, heat treatment (aging) was performed for 1 to 3 minutes with hot water at 60 to 100 ° C. to fix the coating film formed on the surface of the coating sample.

続いて、水溶性塗料(日本ペイント(株)製 AP コート)
を溶解した槽(30℃、2分)に浸漬して塗装し塗膜を形
成せしめた。
Next, water-soluble paint (AP coat manufactured by Nippon Paint Co., Ltd.)
Was immersed in a tank (30 ° C., 2 minutes) in which was dissolved to form a coating film.

上記塗装用試料を水洗いした後、170 ℃で20分、焼付処
理して塗膜を得た。
The above coating sample was washed with water and then baked at 170 ° C. for 20 minutes to obtain a coating film.

得られた塗装用試料の塗膜について、塗装状態の評価お
よび塩水噴霧試験を行った。その結果を表−1に示す。
The coating film of the obtained coating sample was subjected to evaluation of coating state and salt spray test. The results are shown in Table-1.

比較例1 塗装用試料9に、まず化成処理を施して前処理を行なっ
た。次いで、常法によって電着塗装を行ない、電着塗料
を付着させて塗膜を形成せしめる。
Comparative Example 1 The coating sample 9 was first subjected to chemical conversion treatment and pretreatment. Then, electrodeposition coating is carried out by a conventional method, and an electrodeposition coating material is attached to form a coating film.

上記塗装用試料を水洗いしたのち、170 ℃で20分、焼付
処理して塗膜を得る。
The above coating sample is washed with water and then baked at 170 ° C. for 20 minutes to obtain a coating film.

得られた塗装用試料の塗膜について、塗装状態の評価お
よび塩水噴霧試験を行った。その結果を表−1に示す。
The coating film of the obtained coating sample was subjected to evaluation of coating state and salt spray test. The results are shown in Table-1.

比較例2 60〜100 ℃の熱水によって1〜3分間熱処理(エイジン
グ)を行ない、塗装用試料の表面に形成された塗膜を固
定する処理をしない他は、実施例と同様にして塗装用試
料に塗膜を形成し、その塗装状態の評価および塩水噴霧
試験を行った。その結果を表−1に示す。
Comparative Example 2 Coating was carried out in the same manner as in Example 1 except that the coating film formed on the surface of the coating sample was not fixed by heat treatment (aging) for 1 to 3 minutes with hot water at 60 to 100 ° C. A coating film was formed on the sample, and the coating state was evaluated and a salt spray test was performed. The results are shown in Table-1.

e. 発明の効果 上述の如く、本発明に係る塗装方法は、前処理した被塗
物の表面に電着塗料を付着させて塗膜を形成し、水洗い
した後、前記被塗物に熱水および/または蒸気雰囲気処
理を施して前記塗膜を固定し、そののち水溶性塗料を用
いて浸漬塗装してから焼付処理を行って塗膜を形成する
ので、リバース塗装法のように境界部において膜厚が不
均一となり、かつ薄膜となって防錆力が低下するなどの
欠点を解決することができる。
e. Effect of the invention As described above, the coating method according to the present invention is a method of applying a coating film to the surface of an article to be pretreated to form a coating film, washing the surface with water, and then applying hot water to the article to be coated. And / or steam atmosphere treatment is applied to fix the coating film, and then water-soluble paint is used for dip coating, and then baking treatment is performed to form the coating film. It is possible to solve the drawbacks that the film thickness becomes non-uniform, and the film becomes a thin film and the anticorrosive power is lowered.

また、本発明の塗装方法では、通常の前処理水切炉およ
び電着焼付炉を使用することができ、粉体塗装法の如く
特別な炉を必要としないから、エネルギー消費量が少な
く、経済的に有利である。
Further, in the coating method of the present invention, an ordinary pretreatment draining furnace and an electrodeposition baking furnace can be used, and a special furnace is not required unlike the powder coating method, so that the energy consumption is small and the cost is low. Is advantageous to.

しかも、浸漬塗装後、水洗処理を行うため、従来の電着
塗装と浸漬塗装を併用した塗装法における問題点であっ
た液溜まり等によってネジ穴が詰まるなどの問題が発生
しないため、被塗物のネジ穴などを予めマスキングする
必要がなく、また塗装ハンガーが汚れない。さらに、通
電しにくい部位の塗装が可能となるため、耐蝕性上有利
である。
Moreover, since the washing process is performed after immersion coating, there is no problem such as clogging of screw holes due to liquid pool, which was a problem in the conventional coating method that uses both electrodeposition coating and immersion coating. There is no need to mask the screw holes in advance, and the paint hanger does not get dirty. Furthermore, since it is possible to paint a portion that is difficult to energize, it is advantageous in terms of corrosion resistance.

【図面の簡単な説明】[Brief description of drawings]

第1図は、本発明の一実施例に係る塗装方法の手順を示
すフローチャートであり、第2図は、実施例および比較
例にて使用した塗装用試料を示す図である。 1、2……冷却圧延鋼板、 3、4……スペーサー、 5、6、7、8……スポット溶接個所、 9……塗装用試料。
FIG. 1 is a flow chart showing a procedure of a coating method according to an embodiment of the present invention, and FIG. 2 is a view showing coating samples used in Examples and Comparative Examples. 1, 2 ... Cooled rolled steel plate, 3, 4 ... Spacer, 5, 6, 7, 8 ... Spot welding point, 9 ... Painting sample.

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】前処理した被塗物の表面に電着塗料を付着
させて塗膜を形成し、水洗いした後、前記被塗物に熱水
および/または蒸気雰囲気処理を施して前記塗膜を固定
し、そののち水溶性塗料により浸漬塗装して水洗するこ
とを特徴とする塗装方法。
1. A coating film is formed by depositing an electrodeposition paint on the surface of a pre-treated article to be coated, washed with water, and then subjected to hot water and / or steam atmosphere treatment on the article to be coated. Is fixed, and then dip-painted with a water-soluble paint and washed with water.
【請求項2】上記水溶性塗料が、塗料中に含まれる薬品
により被塗物から析出した金属イオンによって水性樹脂
が被塗物の表面に凝析され塗膜を形成するもの、または
金属と配位結合してキレート化合物を形成する高分子化
合物を含むものであることを特徴とする特許請求の範囲
第(1)項記載の塗装方法。
2. The water-soluble coating composition, wherein a water-based resin is coagulated on the surface of the coating object by a metal ion precipitated from the coating object by a chemical contained in the coating composition to form a coating film, or a combination with a metal. The coating method according to claim (1), characterized in that the coating method comprises a polymer compound which is bonded to form a chelate compound.
JP12041386A 1986-05-26 1986-05-26 Painting method Expired - Lifetime JPH0651172B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12041386A JPH0651172B2 (en) 1986-05-26 1986-05-26 Painting method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12041386A JPH0651172B2 (en) 1986-05-26 1986-05-26 Painting method

Publications (2)

Publication Number Publication Date
JPS62277185A JPS62277185A (en) 1987-12-02
JPH0651172B2 true JPH0651172B2 (en) 1994-07-06

Family

ID=14785604

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12041386A Expired - Lifetime JPH0651172B2 (en) 1986-05-26 1986-05-26 Painting method

Country Status (1)

Country Link
JP (1) JPH0651172B2 (en)

Also Published As

Publication number Publication date
JPS62277185A (en) 1987-12-02

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