JP2554920B2 - Electrostatic coating method and electrostatic coating apparatus - Google Patents
Electrostatic coating method and electrostatic coating apparatusInfo
- Publication number
- JP2554920B2 JP2554920B2 JP63197859A JP19785988A JP2554920B2 JP 2554920 B2 JP2554920 B2 JP 2554920B2 JP 63197859 A JP63197859 A JP 63197859A JP 19785988 A JP19785988 A JP 19785988A JP 2554920 B2 JP2554920 B2 JP 2554920B2
- Authority
- JP
- Japan
- Prior art keywords
- coating
- paint
- conductive
- high voltage
- electrostatic coating
- 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
Links
Landscapes
- Electrostatic Spraying Apparatus (AREA)
- Paints Or Removers (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、主として導電性塗料に水性塗料を用い非導
電性塗料に溶剤塗料を用い、被塗装物に対し、共通の塗
布ヘッドを用いて導電性塗料による静電塗装と非導電性
塗料による静電塗装とを行う静電塗装方法及び静電塗装
装置に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention mainly uses a water-based paint as a conductive paint, a solvent paint as a non-conductive paint, and a common coating head for an object to be coated. The present invention relates to an electrostatic coating method and an electrostatic coating device that perform electrostatic coating with a conductive coating and electrostatic coating with a non-conductive coating.
（従来の技術） 従来、溶剤塗料を用いて静電塗装を行うものとして、
塗布ヘッドに高電圧発生器を接続し、該ヘッド内を通過
する塗料に高電圧を印加して塗装を行う静電塗装装置は
知られている。このものは、塗装装置本体に対し塗布ヘ
ッドや塗料配管を絶縁して印加した高電圧が塗装装置本
体側にリークするのを防止して、塗料への帯電を確実に
行なえるようにしている。一方、水性塗料を用いるもの
にあっては、たとえ上記のような絶縁を施したとしても
塗料自体から高電圧がリークしてしまうため、塗布ヘッ
ドに絶縁部材を介して外部電極を取付け、該外部電極に
高電圧発生器を接続し、該塗布ヘッドから噴霧された後
の塗料粒子に高電圧を印加して塗装を行うようにしてい
る（特開昭62−277171号公報）。しかし、このような導
電性塗料を用いた静電塗装と非導電性塗料を用いた静電
塗装とを１台の静電塗装装置で行うものは従来特に無か
った。(Prior Art) Conventionally, as an electrostatic coating using a solvent paint,
An electrostatic coating device is known in which a high voltage generator is connected to a coating head and a high voltage is applied to the coating material passing through the head to perform coating. This one prevents the high voltage applied by insulating the coating head and the coating pipe from the coating apparatus main body to leak to the coating apparatus main body side, so that the coating material can be reliably charged. On the other hand, in the case of using a water-based paint, even if the above-mentioned insulation is applied, the high voltage leaks from the paint itself. A high voltage generator is connected to the electrodes, and a high voltage is applied to the paint particles sprayed from the coating head to perform coating (Japanese Patent Laid-Open No. 62-277171). However, heretofore, there has been no particular one in which electrostatic coating using such a conductive coating and electrostatic coating using a non-conductive coating are performed by a single electrostatic coating apparatus.
（発明が解決しようとする課題） したがって、１台の静電塗装装置により導電性塗料と
非導電性塗料とを用いた塗装を行う場合には、導電性塗
料用の塗装装置と非導電性塗料用の塗装装置との２台の
静電塗装装置が必要となり、設備的に大掛りになる問題
があり、また、非導電性塗料であってもその抵抗値は様
々であり塗装環境によってはリーク現象を起こすことが
あり、更に非導電性のメタリック塗料にあっても塗装作
業の停止時にアルミ顔料が沈澱してアルミ顔料同士が接
触し導電路を構成してリーク現象を起こすことがあり、
このような低導電性塗料に対しいかに確実に帯電して塗
装を行うかが問題となる。(Problems to be Solved by the Invention) Therefore, in the case of coating using a conductive paint and a non-conductive paint by one electrostatic coating device, a coating device for the conductive paint and a non-conductive paint There is a problem in that it requires a large amount of equipment in addition to the electrostatic coating equipment for the paint application for the equipment, and even if it is a non-conductive paint, its resistance value is various and leaks depending on the coating environment. The phenomenon may occur, and even in non-conductive metallic paint, aluminum pigment may precipitate when the painting work is stopped and aluminum pigments may come into contact with each other to form a conductive path, causing a leak phenomenon.
The problem is how to reliably charge such a low-conductivity coating material for coating.
本発明は、かかる問題点を解決し、１台の塗装装置で
導電性塗料と非導電性塗料とを用いた静電塗装を行うこ
とを可能にすると共に、上記低導電性塗料を用いた静電
塗装をも可能にする静電塗装方法及び静電塗装装置を提
供することをその目的とする。The present invention solves such problems and enables electrostatic coating using a conductive paint and a non-conductive paint with a single coating device, and at the same time, a static paint using the above-mentioned low conductive paint is used. It is an object of the present invention to provide an electrostatic coating method and an electrostatic coating device that also enable electrocoating.
（課題を解決するための手段） 本発明は、上記目的を達成すべく、被塗装物に対し、
共通の塗布ヘッドを用いて導電性塗料による静電塗装と
非導電性塗料による静電塗装とを行う静電塗装装置であ
って、塗布ヘッドの前方に絶縁部材を介して外部電極を
取付け、該塗布ヘッドと該外部電極とに制御器を介して
高電圧発生器を選択的及び同時に接続自在としたことを
特徴とする。(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides:
What is claimed is: 1.An electrostatic coating device for performing electrostatic coating with a conductive coating and electrostatic coating with a non-conductive coating using a common coating head, wherein an external electrode is attached in front of the coating head via an insulating member. A high voltage generator can be selectively and simultaneously connected to the coating head and the external electrode via a controller.
（作用） 制御器を介して接続した高電圧発生器により塗布ヘッ
ドから噴霧される塗料に高電圧を印加して塗料粒子を負
に帯電し、アースされた塗被塗装物に吸着させて塗装を
行う。この際、非導電性塗料を用いる場合は、塗布ヘッ
ドに高電圧発生器を接続して塗料を塗布ヘッドを通過す
る際に帯電させるようにし、導電性塗料を用いる場合に
は、前記外部電極に高電圧発生器を接続して塗布ヘッド
から噴霧された後の塗料粒子を該外部電極を通過する際
に帯電させるようにし、また、前記低導電性塗料を用い
る場合には、塗布ヘッドと外部電極とに高電圧発生器を
接続し、塗料に対し塗布ヘッドにおいて帯電すると共
に、塗料粒子となって該外部電極を通過するときに再帯
電させるようにしている。したがって、塗料自体により
リーク現象が生じて塗料への帯電が不足していても再帯
電により確実に帯電させることができる。(Function) A high voltage generator connected via a controller applies a high voltage to the paint sprayed from the coating head to negatively charge the paint particles and cause the paint particles to be attracted to the grounded coating object for coating. To do. At this time, when a non-conductive paint is used, a high voltage generator is connected to the coating head so that the paint is charged when passing through the coating head, and when a conductive paint is used, the external electrode is applied to the external electrode. A high voltage generator is connected to electrically charge the paint particles sprayed from the coating head when passing through the external electrode, and when the low conductive paint is used, the coating head and the external electrode are used. A high voltage generator is connected to and so that the paint is charged in the coating head and is recharged when the paint particles pass through the external electrode. Therefore, even if a leak phenomenon occurs due to the paint itself and the paint is insufficiently charged, it can be reliably charged by recharging.
（実施例） 第１図及び第２図を参照して、１は被塗装物Ｗに塗料
を塗布する塗布ヘッドを示し、該塗布ヘッド１は、塗料
供給通路２に連なるホルダー３と、該ホルダー３の前端
中央に取付けたいわゆるベル型の回転カップ４とから成
り、該ホルダー３の後端でブラケット５を介して図示し
ない塗装ロボットのアームに取付けられている。そし
て、該塗料供給通路２の上流端に接続したマニホルド６
に各選択弁７を介して複数の塗料導入管８を接続し、該
選択弁７により塗料供給通路２を介して該塗料導入管８
から該ホルダー３に導電性塗料である溶剤塗料や非導電
性塗料である水性塗料や低導電性塗料であるメタリック
水性塗料を選択的に導入し、回転カップ４により霧状に
噴霧して前方の被塗装物Ｗに適宜水性塗料や溶剤塗料を
用いた塗装を行うようにしている。(Embodiment) Referring to FIGS. 1 and 2, reference numeral 1 denotes an application head for applying a paint to an object to be coated W, the application head 1 being a holder 3 connected to a paint supply passage 2 and the holder. 3 and a so-called bell-shaped rotating cup 4 mounted at the center of the front end of the holder 3. The holder 3 is attached to the arm of a coating robot (not shown) via a bracket 5 at the rear end of the holder 3. Then, the manifold 6 connected to the upstream end of the paint supply passage 2
To each of which a plurality of paint introduction pipes 8 are connected via the respective selection valves 7.
From this, a solvent paint which is a conductive paint, a water paint which is a non-conductive paint, and a metallic water paint which is a low conductivity paint are selectively introduced into the holder 3 and sprayed in a mist by the rotating cup 4 to the front side. The object W to be coated is appropriately coated with a water-based paint or a solvent paint.
一方、塗布ヘッド１は、前記塗料供給通路２と前記ブ
ラケット５とを絶縁部材で構成して塗装ロボットのアー
ムから絶縁するものとし、ホルダー３の前端に、該回転
カップ４の前方に位置させて絶縁部材たる４本の支持棒
９、９、９、９を介して環状の外部電極10を取付けるよ
うにし、該ホルダー３と該外部電極10とをそれぞれ高圧
ケーブル11、11により制御器12介して高電圧発生器13に
選択的及び同時に接続し、該高電圧発生器13により該ホ
ルダー３に高電圧を印加して塗料を該ホルダー３の内部
通路3aを通過する際に帯電し、あるいは該外部電極10に
高電圧を印加して噴霧された塗料粒子を該外部電極10の
環内を通過する際に帯電するようにし、被塗装物Ｗに帯
電した塗料粒子を吸着させ静電塗装を行う。On the other hand, the coating head 1 is configured such that the coating material supply passage 2 and the bracket 5 are made of an insulating member to insulate the coating robot arm from the arm of the coating robot. An annular external electrode 10 is attached via four support rods 9, 9, 9, 9 which are insulating members, and the holder 3 and the external electrode 10 are respectively connected by high voltage cables 11 and 11 via a controller 12. It is selectively and simultaneously connected to a high voltage generator 13, and a high voltage is applied to the holder 3 by the high voltage generator 13 to charge the paint as it passes through the internal passage 3a of the holder 3, or A high voltage is applied to the electrode 10 so that the sprayed paint particles are charged as they pass through the ring of the external electrode 10, and the charged paint particles are adsorbed to the object W to be electrostatically coated.
尚、図中14、15、16は、それぞれ洗浄配管を構成する
エア配管、シンナー配管及び親水性溶剤配管を示し、こ
れら洗浄配管は、開閉弁17、17、17を介してマニホルド
６に選択的に接続され、塗装切替え時に、該マニホルド
６から塗料供給配管２を介して塗布ヘッド１に至る経路
に、適宜エアと親水性溶剤と溶剤とを導入して洗浄作業
を行うようにしている。In the figure, reference numerals 14, 15, and 16 respectively represent an air pipe, a thinner pipe, and a hydrophilic solvent pipe which constitute cleaning pipes, and these cleaning pipes are selectively connected to the manifold 6 via the on-off valves 17, 17, 17. When switching the coating, air, a hydrophilic solvent, and a solvent are appropriately introduced into the path from the manifold 6 to the coating head 1 via the coating material supply pipe 2 to perform the cleaning work.
以上の構成において、溶剤塗料により塗装を行う場合
には、ホルダー３に高電圧を印加して塗料を該ホルダー
３を通過する際に帯電させ、水性塗料により塗装を行う
場合には、外部電極10に高電圧を印加して噴霧後の塗料
粒子を該外部電極10を通過する際に帯電させるように
し、各塗料の電気的性質により高電圧の印加箇所を替え
て塗料を確実に帯電させるようにしている。In the above configuration, when coating with a solvent paint, a high voltage is applied to the holder 3 to charge the paint as it passes through the holder 3, and when coating with a water-based paint, the external electrode 10 is used. A high voltage is applied to the paint particles so that the paint particles after spraying are charged when passing through the external electrode 10, and the paint is surely charged by changing the high voltage application location depending on the electrical properties of each paint. ing.
また、メタリック水性塗料により塗装を行う場合に
は、ホルダー３に印加して塗料を該ホルダー３を通過す
る際に帯電させ、かつ外部電極10に印加して塗料粒子を
該外部電極10を通過する際にも帯電させるようにして、
アルミ顔料同士の接触によりリーク現象が生じて該ホル
ダー３内での塗料への帯電が不十分な場合でも、該外部
電極10による再帯電で塗料粒子を確実に帯電させるよう
にしている。When coating with a metallic water-based paint, the paint is applied to the holder 3 to charge the paint as it passes through the holder 3, and the paint particles are applied to the external electrode 10 to pass the paint particles through the external electrode 10. Make sure to charge even when
Even if the paint is not sufficiently charged in the holder 3 due to the leakage phenomenon caused by the contact between the aluminum pigments, the paint particles are surely charged by the recharging by the external electrode 10.
（発明の効果） 以上のように本発明によれば、非導電性塗料による塗
装を行う場合には、塗布ヘッドを介して該塗布ヘッドを
通過する塗料に高電圧を印加し、導電性塗料による塗装
を行う場合には、外部電極を介して噴霧後の塗料粒子に
高電圧を印加することにより、塗料をその電気的性質に
応じて適切に帯電でき、１台の塗装装置で非導電性塗料
と導電性塗料とを用いた塗装を可能にし、更に、低導電
性塗料による塗装を行う場合には、塗布ヘッドを介して
該塗布ヘッドを通過する塗料に高電圧を印加すると共
に、外部電極を介して噴霧後の塗料粒子に高電圧を印加
するようにして、塗料を再帯電することにより最適に帯
電させ、塗着効率を向上し得る効果を有する。(Effect of the invention) As described above, according to the present invention, when coating with a non-conductive paint, a high voltage is applied to the paint passing through the coating head through the coating head, and the conductive paint is applied. When painting, by applying a high voltage to the paint particles after spraying through the external electrodes, the paint can be appropriately charged according to its electrical properties, and the non-conductive paint can be applied with one coating device. When coating with a low-conductivity paint, a high voltage is applied to the paint passing through the application head through the application head, and the external electrode is applied. A high voltage is applied to the paint particles after spraying to recharge the paint, thereby optimally charging the paint and improving the coating efficiency.
第１図は本発明を実施した静電塗装装置の概略図、第２
図は塗布ヘッドの正面図である。 １…塗布ヘッド ９…絶縁部材 10…外部電極 12…制御器 13…高電圧発生器 Ｗ…被塗装物FIG. 1 is a schematic view of an electrostatic coating apparatus embodying the present invention, and FIG.
The figure is a front view of the coating head. 1 ... Coating head 9 ... Insulation member 10 ... External electrode 12 ... Controller 13 ... High voltage generator W ... Object to be coated
Claims (2)
て導電性塗料による静電塗装と非導電性塗料による静電
塗装とを行う静電塗装方法であって、非導電性塗料によ
る塗装を行う場合には、塗布ヘッドを通過する塗料に高
電圧を印加し、導電性塗料による塗装を行う場合には、
塗布ヘッドから噴霧された後の塗料粒子に高電圧を印加
し、導電性と非導電性の中間の性質を持つ低導電性塗料
による塗装を行う場合には、塗布ヘッドを通過する塗料
と塗布ヘッドから噴霧された後の塗料粒子とに高電圧を
印加することを特徴とする静電塗装方法。1. An electrostatic coating method in which electrostatic coating with a conductive paint and electrostatic coating with a non-conductive paint are performed on an object to be coated by using a common coating head. When painting, apply a high voltage to the paint passing through the application head, and if painting with conductive paint,
When a high voltage is applied to the paint particles that have been sprayed from the coating head, and coating with a low-conductivity coating material having an intermediate property between conductive and non-conductive is performed, the coating material that passes through the coating head and the coating head An electrostatic coating method, characterized in that a high voltage is applied to the paint particles that have been sprayed from.
て導電性塗料による静電塗装と非導電性塗料による静電
塗装とを行う静電塗装装置であって、塗布ヘッドの前方
に絶縁部材を介して外部電極を取付け、該塗布ヘッドと
該外部電極とに制御器を介して高電圧発生器を選択的及
び同時に接続自在としたことを特徴とする静電塗装装
置。2. An electrostatic coating apparatus for performing electrostatic coating with a conductive coating and electrostatic coating with a non-conductive coating on an object to be coated using a common coating head, the electrostatic coating apparatus comprising: An electrostatic coating apparatus, wherein an external electrode is attached via an insulating member, and a high voltage generator can be selectively and simultaneously connected to the coating head and the external electrode via a controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63197859A JP2554920B2 (en) | 1988-08-10 | 1988-08-10 | Electrostatic coating method and electrostatic coating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63197859A JP2554920B2 (en) | 1988-08-10 | 1988-08-10 | Electrostatic coating method and electrostatic coating apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0247174A JPH0247174A (en) | 1990-02-16 |
| JP2554920B2 true JP2554920B2 (en) | 1996-11-20 |
Family
ID=16381517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63197859A Expired - Lifetime JP2554920B2 (en) | 1988-08-10 | 1988-08-10 | Electrostatic coating method and electrostatic coating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2554920B2 (en) |
-
1988
- 1988-08-10 JP JP63197859A patent/JP2554920B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0247174A (en) | 1990-02-16 |
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| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |