JPH1157590A - Method of coating automobile sash - Google Patents

Method of coating automobile sash

Info

Publication number
JPH1157590A
JPH1157590A JP22932497A JP22932497A JPH1157590A JP H1157590 A JPH1157590 A JP H1157590A JP 22932497 A JP22932497 A JP 22932497A JP 22932497 A JP22932497 A JP 22932497A JP H1157590 A JPH1157590 A JP H1157590A
Authority
JP
Japan
Prior art keywords
spray
coating
cycle
intermittent
sash
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.)
Pending
Application number
JP22932497A
Other languages
Japanese (ja)
Inventor
Toru Takeuchi
徹 竹内
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.)
Kansai Paint Co Ltd
Original Assignee
Kansai Paint 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 Kansai Paint Co Ltd filed Critical Kansai Paint Co Ltd
Priority to JP22932497A priority Critical patent/JPH1157590A/en
Publication of JPH1157590A publication Critical patent/JPH1157590A/en
Pending legal-status Critical Current

Links

Landscapes

  • Spray Control Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

PROBLEM TO BE SOLVED: To efficiently coat only a sash part of automobile car body and to minimize adverse effect on a shell body caused by splashed coating particles by using a binary fluid nozzle spray coating machine and spray coating by intermittent spray specified in the cycle and the discharge time of a coating material. SOLUTION: In an intermittent spray, the possible distance of the spray particles is proportional to the frequency of the intermittent cycle different in a continuous spray and the flying distance is shorter with the smaller numbers of the cycle and the shorter discharge time. The possible distance is suppressed to about 30 cm by a high speed spray <=20 times/sec in the cycle and <=50 ms in the discharge time of one cycle. The micronizing of the coating material is completed in about 5 cm from the nozzle and the atomizing level is not changed if the spray pressure is equal. The splash of the uncoated spray particles to the automobile body shell part except the sash part 1 is suppressed by the electrostatic attracting force. Only the automobile sash part 1 is selectively coated and the splash of the spray dust is minimized.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、自動車ボディのサ
ッシュ部分のみを効率的に塗装し、且つ飛散塗料粒子に
よる外板ボディへの悪影響を最小にすることができる塗
装方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a coating method capable of efficiently coating only a sash portion of an automobile body and minimizing adverse effects on the outer panel body due to scattered paint particles.

【0002】[0002]

【従来技術及びその課題】自動車ボディのドアサッシュ
は、車体と同一の塗料が塗装される場合を除いてはサッ
シュ黒(サックロ)と呼ばれる艶消しの黒色塗料が塗装
される。通常は電着塗装が施されたボディに中塗り塗料
が塗装され、ウエットオンウエットでサッシュ部分にサ
ックロが塗装され、一旦焼付け乾燥される。その後サッ
シュ部分はマスキングされた状態で上塗り塗料を塗装す
るという工程が採られている。サックロの塗装はエアー
スプレー塗装機を使用し、スプレーマンによるハンドス
プレー塗装で対応している。ドアサッシュの塗装面積は
狭く長いため、スプレーパターンは最小の丸吹きパター
ンにして狙いを定めてスプレーするが、丸吹きパターン
は平吹きパターンよりも直進性が強く、狙いから外れた
パターン内の霧化塗料粒子はサッシュ部分以外のボディ
外板に降りかかり、結果的に中塗り外板の肌を荒らすこ
とになる。このことは最終的に上塗り塗膜の仕上がり肌
を左右することになり、ドアサッシュ部分だけを効率良
く塗装する方法の開発が望まれていた。
2. Description of the Related Art A door sash of an automobile body is coated with a matte black paint called sash black (Saclo) except for the case where the same paint as the vehicle body is applied. Normally, an intermediate coating is applied to the body that has been subjected to electrodeposition coating, a sash is applied to the sash portion by wet-on-wet, and then baked and dried. Thereafter, the sash portion is coated with a top coat in a masked state. The painting of Saclo uses an air spray painting machine, and it is handled by hand spray painting by a spray man. Since the painting area of the door sash is small and long, the spray pattern is aimed at the smallest round spray pattern, and spraying is aimed at. The chemical paint particles fall on the body skin other than the sash portion, and as a result, the skin of the intermediate coating skin is roughened. This ultimately affects the finished skin of the top coat, and there has been a demand for a method of efficiently coating only the door sash portion.

【0003】[0003]

【発明が解決しようとする課題】本発明が解決しようと
する課題は、自動車ボディのサッシュ部分のみを効率的
に塗装し、且つ飛散塗料粒子による外板ボディへの悪影
響を最小にすることができる塗装方法を提供することで
ある。
SUMMARY OF THE INVENTION An object of the present invention is to efficiently paint only the sash portion of an automobile body and to minimize the adverse effect of the scattered paint particles on the outer panel body. It is to provide a painting method.

【0004】[0004]

【課題を解決するための手段】本発明者等は、上記した
課題を解決するために鋭意検討を重ねた結果、自動車サ
ッシュ部分のみを選択的に塗装することが可能で、且つ
スプレーダストの飛散を最小限にすることができる塗装
方法を見出し、本発明を完成させるに至った。かくし
て、本発明によれば、二流体ノズルの霧化塗装機を使用
し、20回/秒以下のサイクルで、且つ1サイクルにお
ける塗料吐出時間が50ms以内の断続スプレーにより
霧化塗装することを特徴とする自動車サッシュの塗装方
法が提供される。
The inventors of the present invention have made intensive studies to solve the above-mentioned problems, and as a result, it has been possible to selectively paint only the sash portion of an automobile, and the spray dust is scattered. The present inventors have found a coating method capable of minimizing the amount of water, and have completed the present invention. Thus, according to the present invention, the atomizing coating is performed by an intermittent spray using a two-fluid nozzle atomizing coating machine at a cycle of 20 times / second or less and a paint discharge time within one cycle of 50 ms or less. And a method for coating an automobile sash.

【0005】[0005]

【発明の実施の形態】本発明において、塗装機は通常の
エアースプレーガンをそのまま使用することも可能であ
るが、断続スプレー専用のスプレーガンを使用する方が
望ましい。これは、塗料及び霧化エアーのON/OFF
を極力高速で繰り返す必要があるため、耐久性と高速性
が特に要求されるからである。エアースプレーガン(二
流体ノズル)を静電塗装機にするためにはガンの運行装
置(スプレーマンが代行する場合もある)とエアースプ
レーガンを電気的に絶縁する必要があるが、通常は接地
されたガン運行機器との距離が10cm以上になるよう
な絶縁材(例えばテフロンやデルリン等)を加工したも
のが使用できる。更に、電気的に絶縁されたエアースプ
レーガンに高電圧が印加できるように高圧ケーブルを敷
設し、ガンの導体部分に接続する。安全性を確保するに
は、使用するガンは極力小型であることが望ましい。な
ぜなら、電気的に絶縁されたガン(通常は金属導体)と
接地された周辺機器とで構成される静電容量はガンの表
面積に比例し、万が一スプレーガンからの放電が起こっ
た場合、その放電エネルギーはガンの静電容量に正比例
するからである。但し、本発明で使用する印加電圧は通
常10kv以内(一般的な静電塗装での印加電圧は−6
0〜−90kvである)なので、より安全な領域で使用
することができる。
DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, an ordinary air spray gun can be used as a coating machine as it is, but it is preferable to use a spray gun dedicated to intermittent spraying. This is ON / OFF of paint and atomization air
Is required to be repeated at the highest possible speed, so that durability and high speed are particularly required. In order to use an air spray gun (two-fluid nozzle) as an electrostatic coating machine, it is necessary to electrically insulate the gun operation device (sometimes a sprayman may act on behalf) and the air spray gun, but usually it is grounded An insulating material (for example, Teflon, Delrin or the like) processed so as to have a distance of 10 cm or more from the operated gun operation device can be used. Further, a high voltage cable is laid so that a high voltage can be applied to the electrically insulated air spray gun, and is connected to a conductor of the gun. In order to ensure safety, it is desirable that the gun used is as small as possible. Because the capacitance of an electrically insulated gun (usually a metal conductor) and grounded peripherals is proportional to the surface area of the gun. Energy is directly proportional to the capacitance of the gun. However, the applied voltage used in the present invention is usually within 10 kv (applied voltage for general electrostatic coating is -6 kV).
0 to -90 kv), so that it can be used in a more secure area.

【0006】本発明での塗装距離は10cm以内に設定
するが、これは断続スプレー塗装における噴霧粒子の直
進性が維持され且つ自動車のサッシュを効率的に塗装で
きる距離である。発明者等が鋭意検討した結果によれ
ば、同一霧化圧で連続スプレーと断続スプレーを比較す
ると、ノズル出口でのエアー噴出速度はほぼ同じである
が、その後の速度減衰傾向が異なり、連続スプレーでは
噴霧粒子の飛行距離が1m以上になるのに対して、断続
スプレーでは噴霧粒子の到達距離は断続サイクルの周波
数に比例し、サイクル数が少なく、且つ吐出時間が短く
なるほど飛行距離は短くなり、20回/秒以下、望まし
くは10回/秒以下で、吐出時間が50ms以内、望ま
しくは20ms以内の高速断続スプレーにすることで到
達距離を約30cm程度に抑制することが可能である。
塗料の微粒化はノズルからほぼ5cm程度で完了し、霧
化圧が同じであれば微粒化レベルはほとんど変わらな
い。塗着効率を向上させるには噴霧粒子にある程度の慣
性力が必要であるが、塗装距離を10cm以内に設定す
ることで確保することができる。更に、未塗着噴霧粒子
に関しては、静電吸引力でサッシュ部分以外の自動車ボ
ディ外板部への飛散を抑制することができる。塗装距離
が10cm以内と近く、印加電圧も−30kv以内と低
いため、形成される電界はスプレーノズルとサッシュ部
分との限定された領域のみに作用することになる。
[0006] The coating distance in the present invention is set within 10 cm, which is a distance where the straightness of the spray particles in the intermittent spray coating is maintained and the sash of the automobile can be coated efficiently. According to the results of diligent studies by the inventors, when comparing continuous spray and intermittent spray with the same atomization pressure, the air ejection speed at the nozzle outlet is almost the same, but the subsequent speed decay tendency is different, and the continuous spray Whereas the flight distance of the spray particles becomes 1 m or more, in intermittent spray, the reach of the spray particles is proportional to the frequency of the intermittent cycle, the number of cycles is small, and the shorter the ejection time, the shorter the flight distance, By using a high-speed intermittent spray with a discharge speed of 20 times / second or less, desirably 10 times / second or less and a discharge time of 50 ms or less, desirably 20 ms or less, the reach can be suppressed to about 30 cm.
The atomization of the paint is completed in about 5 cm from the nozzle, and the atomization level hardly changes if the atomization pressure is the same. In order to improve the coating efficiency, some inertial force is required for the spray particles, but it can be ensured by setting the coating distance within 10 cm. Further, with respect to the uncoated spray particles, the scattering of the uncoated spray particles to the vehicle body outer plate portion other than the sash portion can be suppressed by the electrostatic attraction force. Since the coating distance is as close as 10 cm or less and the applied voltage is as low as -30 kv, the electric field formed acts only on a limited area between the spray nozzle and the sash portion.

【0007】[0007]

【発明の効果】本発明の塗装方法によれば、自動車サッ
シュ部分のみを選択的に塗装することが可能で、且つス
プレーダストの飛散を最小限にすることができる。
According to the coating method of the present invention, it is possible to selectively coat only the sash portion of an automobile and to minimize the scattering of spray dust.

【0008】[0008]

【実施例】図1は本発明の代表的な実施例に基づく説明
図である。断続スプレー用エアースプレーガン2にはア
ネスト岩田社製のSGA−2を使用、塗装ロボット5の
アームリストにインシュレーター3を介し取り付けた。
スプレーガンは断続スプレーサイクルがタイマー設定で
自由に変更可能なスプレーコントローラー6、及び高電
圧を供給するための高電圧発生器4が接続されている。
また、同時に塗料タンク、定量ポンプ、カラーチェンジ
バルブから構成された塗料供給装置(図示せず)により
サックロ用塗料(関西ペイント社製)を供給した。塗装
条件は、平均吐出量50cc/分、霧化圧3.5kg/
cm2、印加電圧−15kv、断続スプレーサイクル1
0回/秒の霧化条件で、塗装ロボットのガン運行速度は
0.6m/秒、且つ自動車サッシュ被塗物との塗装距離
10cmでティーチングされた軌跡をトレースしながら
塗装を行なった。その結果、スプレーダスト飛散範囲を
従来の1/3以下に抑制することができ、塗着効率はハ
ンドスプレーによる従来方法と比較して約2倍に向上さ
せることができた。
FIG. 1 is an explanatory view based on a typical embodiment of the present invention. The air spray gun 2 for the intermittent spray was SGA-2 manufactured by Anest Iwata Co., Ltd., and was attached to the arm wrist of the coating robot 5 via the insulator 3.
The spray gun is connected to a spray controller 6 whose intermittent spray cycle can be freely changed by setting a timer, and a high voltage generator 4 for supplying a high voltage.
At the same time, Saculo paint (manufactured by Kansai Paint Co., Ltd.) was supplied by a paint supply device (not shown) composed of a paint tank, a metering pump, and a color change valve. The coating conditions were as follows: average discharge rate 50 cc / min, atomization pressure 3.5 kg / min.
cm 2 , applied voltage -15 kv, intermittent spray cycle 1
Under the atomization condition of 0 times / second, the coating was performed while tracing the locus of teaching at a gun operation speed of the coating robot of 0.6 m / second and a coating distance of 10 cm with the automobile sash to be coated. As a result, the spray dust scattering range could be suppressed to 1/3 or less of the conventional method, and the coating efficiency could be improved about twice as compared with the conventional method using the hand spray.

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

【図1】本発明の代表的な実施例説明図。FIG. 1 is an explanatory view of a typical embodiment of the present invention.

【符号の説明】[Explanation of symbols]

1 自動車サッシュ被塗物 2 断続エアースプレーガン 3 インシュレーター(絶縁材) 4 高電圧発生器 5 塗装ロボット 6 断続スプレーコントローラー DESCRIPTION OF SYMBOLS 1 Car sash coating object 2 Intermittent air spray gun 3 Insulator (insulating material) 4 High voltage generator 5 Painting robot 6 Intermittent spray controller

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 二流体ノズルの霧化塗装機を使用し、2
0回/秒以下のサイクルで、且つ1サイクルにおける塗
料吐出時間が50ms以内の断続スプレーにより霧化塗
装することを特徴とする自動車サッシュの塗装方法。
1. A two-fluid nozzle spray coating machine,
A coating method for an automobile sash, wherein atomizing coating is performed by an intermittent spray having a cycle of 0 times / second or less and a paint discharge time in one cycle of 50 ms or less.
【請求項2】 二流体ノズルが電気的に絶縁されてお
り、二流体ノズルの霧化塗装機と被塗物との塗装距離が
10cm以内で、且つ−30kv以内の負電圧を印加す
る静電塗装機である請求項1の方法。
2. A two-fluid nozzle is electrically insulated, and a coating distance between an atomizing coating machine of the two-fluid nozzle and an object to be coated is within 10 cm, and a negative voltage of within -30 kv is applied. The method of claim 1 which is a painting machine.
【請求項3】 二流体ノズルを自動車サッシュに沿って
運行させる手段が塗装ロボットである請求項1の方法。
3. The method of claim 1 wherein the means for moving the two-fluid nozzle along the vehicle sash is a painting robot.
JP22932497A 1997-08-26 1997-08-26 Method of coating automobile sash Pending JPH1157590A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22932497A JPH1157590A (en) 1997-08-26 1997-08-26 Method of coating automobile sash

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22932497A JPH1157590A (en) 1997-08-26 1997-08-26 Method of coating automobile sash

Publications (1)

Publication Number Publication Date
JPH1157590A true JPH1157590A (en) 1999-03-02

Family

ID=16890374

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22932497A Pending JPH1157590A (en) 1997-08-26 1997-08-26 Method of coating automobile sash

Country Status (1)

Country Link
JP (1) JPH1157590A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007069136A (en) * 2005-09-08 2007-03-22 Toyota Motor Corp Electrostatic coating apparatus and method for preventing electrostatic coating apparatus from fouling with paint

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007069136A (en) * 2005-09-08 2007-03-22 Toyota Motor Corp Electrostatic coating apparatus and method for preventing electrostatic coating apparatus from fouling with paint
JP4645375B2 (en) * 2005-09-08 2011-03-09 トヨタ自動車株式会社 Electrostatic coating equipment

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