JPH0137973B2 - - Google Patents
Info
- Publication number
- JPH0137973B2 JPH0137973B2 JP8268985A JP8268985A JPH0137973B2 JP H0137973 B2 JPH0137973 B2 JP H0137973B2 JP 8268985 A JP8268985 A JP 8268985A JP 8268985 A JP8268985 A JP 8268985A JP H0137973 B2 JPH0137973 B2 JP H0137973B2
- Authority
- JP
- Japan
- Prior art keywords
- powder
- perforated plate
- plate
- electrode plate
- case
- 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
Links
- 239000000843 powder Substances 0.000 claims description 24
- 239000011248 coating agent Substances 0.000 claims description 11
- 238000000576 coating method Methods 0.000 claims description 11
- 239000000428 dust Substances 0.000 description 3
- 238000004880 explosion Methods 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000009503 electrostatic coating Methods 0.000 description 1
Landscapes
- Coating Apparatus (AREA)
- Electrostatic Spraying Apparatus (AREA)
Description
【発明の詳細な説明】
〔発明の目的〕
本発明は、静電粉体塗装技術に係る塗装装置に
関するものである。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] The present invention relates to a coating device related to electrostatic powder coating technology.
従来から、塗料粉体に電荷を与え、該粉体を被
塗装物に対して静電的に付着させる静電粉体塗装
技術が知られており、塗料の無駄を省き、均一な
装塗面が得られ、かつ大量生産に向くといつた利
点を備えて重宝されているが、従来の塗装装置に
は粉塵爆発（発火）を起こす危険がある。これは
塗料粉体に電荷を与える際の放電電流値が数十
μAから数百μAと大きいために大気中で火花が発
生するのが原因である。 Electrostatic powder coating technology has been known for a long time, in which paint powder is charged and the powder is electrostatically attached to the object to be coated. However, conventional coating equipment has the risk of causing a dust explosion (ignition). This is because the discharge current when charging the paint powder is large, ranging from several tens of μA to several hundred μA, and sparks are generated in the atmosphere.
本発明の静電粉体塗装装置は以上の点に鑑み、
放電電流値を小さくおさえる構成になり、大気中
に火花を発生させず粉塵爆発を防止することを目
的とする。 In view of the above points, the electrostatic powder coating apparatus of the present invention has the following features:
It has a structure that suppresses the discharge current value to a small value, and aims to prevent dust explosions without generating sparks in the atmosphere.
〔発明の構成〕
この目的を達成するため、本発明の塗装装置
は、ケースの内部に多孔板を横架設し、該多孔板
の内部に、または該多孔板の下面に当接させて電
極板を配し、前記多孔板上に載せた粉体に電荷を
与えるようにした。[Structure of the Invention] In order to achieve this object, the coating device of the present invention has a perforated plate installed horizontally inside the case, and an electrode plate is placed inside the perforated plate or in contact with the lower surface of the perforated plate. was arranged to apply an electric charge to the powder placed on the porous plate.
つぎに本発明の実施例を図面にしたがつて説明
する。 Next, embodiments of the present invention will be described with reference to the drawings.
第１実施例に係る第１図において、符号１は天
部を開口したケースを示し、該天部に対し着脱自
在になる蓋２が冠装され、左右内壁に設けた段部
３，３に電極板５を内蔵した多孔板４が水平に横
架設されている。電極板５に対しては、ケース１
外に配した高圧発生器６から延びるケーブル７，
７が接続されている。符号８は、前記多孔板４よ
り下部においてケース１の側壁に開設された送気
孔であつて、前記蓋２に、該送気孔８に対応する
噴気孔９…が形成されている。この噴気孔９…
は、該噴気孔９…の上側に並べられる被塗装物Ｗ
の個数や形状に合わせて形成される。 In FIG. 1 relating to the first embodiment, reference numeral 1 indicates a case with an open top, and a lid 2 that can be attached to and removed from the top is mounted on the top. A perforated plate 4 containing an electrode plate 5 is installed horizontally. For electrode plate 5, case 1
A cable 7 extending from a high voltage generator 6 arranged outside,
7 is connected. Reference numeral 8 denotes an air supply hole opened in the side wall of the case 1 below the perforated plate 4, and blowholes 9 corresponding to the air supply hole 8 are formed in the lid 2. This fumarole 9...
is the object to be painted W arranged above the blowholes 9...
It is formed according to the number and shape of.
上記塗装装置は、高圧発生器６で発生させた直
流60KV程度までの正または負の高電圧をケーブ
ル７を介して電極板５にかけ、多孔板４を帯電さ
せる一方で、送気孔８から所定の圧力をもつてド
ライエアを送り込み、多孔板４上に載せた粉体Ｐ
を帯電させつつチヤンバ１０内で浮遊流動させ、
該粉体Ｐを噴気孔９から噴き出し、あらかじめ該
粉体Ｐと反対の電荷を与えた被塗装物Ｗに付着さ
せるもので、被塗装物Ｗの上側に配したフード１
１にエアを吸収して余剰粉体Ｐを集めるようにな
り、電極板５を、粉体Ｐを載せかつドライエアを
通過させる多孔板４に内蔵する構成としたため、
従来装置より１桁ないし２桁少ない2μA以下の小
さな放電電流値で充分な帯電作用を果たす。また
前記ドライエアの温度を制御することにより、大
気との温度差によつて生じる粉体Ｐ表面における
結露をなくして該粉体Ｐの吸湿を防ぎ、該粉体Ｐ
の帯電性や被塗装物Ｗに対する付着性を高めるこ
とができる。 The above coating device applies a positive or negative high voltage of up to about 60 KV DC generated by a high voltage generator 6 to an electrode plate 5 via a cable 7 to charge a perforated plate 4, while a predetermined voltage is applied from an air supply hole 8 to an electrode plate 5. Powder P placed on the perforated plate 4 by sending dry air under pressure
floating and flowing in the chamber 10 while being electrically charged,
The powder P is ejected from the blowhole 9 and is attached to the object W to be coated, which has been given an opposite electric charge to that of the powder P in advance.
1 absorbs air and collects excess powder P, and the electrode plate 5 is built in the perforated plate 4 on which the powder P is placed and through which dry air passes.
A sufficient charging effect is achieved with a small discharge current value of 2 μA or less, which is one or two orders of magnitude lower than conventional devices. Furthermore, by controlling the temperature of the dry air, dew condensation on the surface of the powder P caused by the temperature difference with the atmosphere is eliminated, moisture absorption of the powder P is prevented, and the powder P
It is possible to improve the charging property of the paint and the adhesion to the object W to be coated.
第２図は本発明の第２実施例を示し、上記第１
実施例と比較して、電極板５を多孔板４の下面に
当接固着した点において相違している。また第３
図は本発明の第３実施例として、粉体Ｐの堆積レ
ベルを検知するレベルセンサ１２を備え、かつ該
レベルセンサ１２への放電を防止するための絶縁
性遮蔽板１３，１４を多孔板４内と粉体Ｐ内に配
したものを示し、両実施例とも上記第１実施例装
置と同様に少ない放電電流値で塗装できる特徴を
有している。 FIG. 2 shows a second embodiment of the present invention, and shows the first embodiment of the invention.
This embodiment differs from the embodiment in that the electrode plate 5 is fixed in contact with the lower surface of the porous plate 4. Also the third
The figure shows a third embodiment of the present invention, which is equipped with a level sensor 12 for detecting the accumulation level of powder P, and insulating shielding plates 13 and 14 for preventing discharge to the level sensor 12. Both embodiments are characterized in that they can be coated with a small discharge current value, similar to the apparatus of the first embodiment.
以上説明したように本発明の静電粉体塗装装置
は、電極板を粉体に近くドライエアの通り路とな
る多孔板の内部かその下面に当接配置したもので
あつて、少ない放電電流値をもつて粉体を帯電さ
せることが可能となり、大気中に火花を発生させ
ずにきれいな静電塗装を仕上げることができ、粉
塵爆発の危険を解消することができる。
As explained above, the electrostatic powder coating apparatus of the present invention is such that the electrode plate is disposed close to the powder and in contact with the inside or underside of the porous plate that serves as a path for dry air, and the discharge current is small. This makes it possible to charge the powder with electricity, and it is possible to finish a clean electrostatic coating without generating sparks in the atmosphere, eliminating the risk of dust explosion.
第１図ないし第３図はそれぞれ本発明の実施例
に係る静電粉体塗装装置の断面図である。
１……ケース、２……蓋、３……段部、４……
多孔板、５……電極板、６……高圧発生器、７…
…ケーブル、８……送気孔、９……噴気孔、１０
……チヤンバ、１１……フード、１２……レベル
センサ、１３，１４……絶縁性遮蔽板、Ｐ……粉
体、Ｗ……被塗装物。
1 to 3 are sectional views of electrostatic powder coating apparatuses according to embodiments of the present invention, respectively. 1...Case, 2...Lid, 3...Step part, 4...
Porous plate, 5... Electrode plate, 6... High pressure generator, 7...
... Cable, 8 ... Air supply hole, 9 ... Fumarole, 10
...Chamber, 11...Hood, 12...Level sensor, 13, 14...Insulating shielding plate, P...Powder, W...Object to be painted.
Claims (1)
に対して静電的に付着させる静電粉体塗装装置に
おいて、ケースの内部に多孔板を横架設し、該多
孔板の内部にまたは該多孔板の下面に当接させて
電極板を配し、前記多孔板上に載せた粉体に電荷
を与えるようにしたことを特徴とする静電粉体塗
装装置。1. In an electrostatic powder coating device that applies an electric charge to various types of powder and electrostatically attaches the powder to the object to be coated, a perforated plate is installed horizontally inside the case, and the inside of the perforated plate is installed horizontally inside the case. An electrostatic powder coating apparatus characterized in that an electrode plate is disposed in contact with the bottom surface of the perforated plate to apply an electric charge to the powder placed on the perforated plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8268985A JPS61242656A (en) | 1985-04-19 | 1985-04-19 | Electrostatic coating apparatus for powdery material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8268985A JPS61242656A (en) | 1985-04-19 | 1985-04-19 | Electrostatic coating apparatus for powdery material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61242656A JPS61242656A (en) | 1986-10-28 |
| JPH0137973B2 true JPH0137973B2 (en) | 1989-08-10 |
Family
ID=13781383
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8268985A Granted JPS61242656A (en) | 1985-04-19 | 1985-04-19 | Electrostatic coating apparatus for powdery material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61242656A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0659428B2 (en) * | 1985-05-23 | 1994-08-10 | ソマ−ル株式会社 | Electrostatic flow dipping device for powder coating |
| FR2795004A1 (en) * | 1999-06-15 | 2000-12-22 | Atofina | METHOD FOR COVERING AN OBJECT WITH A FILM AND APPARATUS FOR CARRYING OUT SAID METHOD |
| JP5303990B2 (en) * | 2008-03-28 | 2013-10-02 | 東レ株式会社 | Paint supply roll, roll coating apparatus, and method for producing coated web |
-
1985
- 1985-04-19 JP JP8268985A patent/JPS61242656A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61242656A (en) | 1986-10-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |