JPS6227057A - Electrostatic coating device - Google Patents
Electrostatic coating deviceInfo
- Publication number
- JPS6227057A JPS6227057A JP16402185A JP16402185A JPS6227057A JP S6227057 A JPS6227057 A JP S6227057A JP 16402185 A JP16402185 A JP 16402185A JP 16402185 A JP16402185 A JP 16402185A JP S6227057 A JPS6227057 A JP S6227057A
- Authority
- JP
- Japan
- Prior art keywords
- air
- coating
- chamber
- positive pressure
- electrostatic
- 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
Links
Landscapes
- Electrostatic Spraying Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本考案は、高電圧が印加され且つエアモータにより高速
回転駆動されるカップ状体に導電性塗布剤を供給して静
電霧化する静電塗布機によって、被塗物の表面に対して
所望の表面処理剤を塗布する静電塗布装置に関する。Detailed Description of the Invention [Industrial Application Field] The present invention is an electrostatic atomization method in which a conductive coating agent is supplied to a cup-shaped body to which a high voltage is applied and which is driven to rotate at high speed by an air motor. The present invention relates to an electrostatic coating device that applies a desired surface treatment agent to the surface of a workpiece using a coating machine.
（従来技術とその問題点〕
例えば、帯状板体に成形されて連続的に搬送される鋼板
等の表面に水溶性防錆油等の導電性塗布剤を塗布して薄
油膜を形成させる静電塗布装置にあっては、例えばＤＣ
−８０〜１２０にν程度の高電圧が印加され且つエアモ
ータにより約２０．０００〜５０．０００ｒｐｍ程度に
高速回転駆動されるカップ状体に塗布剤を供給して静電
霧化する静電塗布機を塗布室内に配設し、カップ状体を
陰極とし、接地されて搬送される鋼板等の被塗物を陽極
として両極間に静電場を形成し、カップ状体から噴霧さ
れた塗布剤粒子を反対極である被塗物の表面に電気的吸
引力で吸引させて静電塗着させるように成されている。(Prior art and its problems) For example, an electrostatic charge that forms a thin oil film by applying a conductive coating agent such as a water-soluble anti-corrosion oil to the surface of a steel plate, etc. that is formed into a belt-shaped plate and continuously transported. For coating equipment, for example, DC
An electrostatic applicator that supplies a coating agent to a cup-shaped body to which a high voltage of about ν is applied to -80 to 120 rpm and is driven to rotate at a high speed of about 20,000 to 50,000 rpm by an air motor to electrostatically atomize it. is placed in the coating chamber, the cup-shaped body is used as a cathode, and the object to be coated, such as a grounded steel plate, is used as an anode. It is designed so that it is attracted to the surface of the object to be coated, which is the opposite polarity, by electrical attraction force and electrostatically coated.
ところで、このようにカップ状体から噴霧された導電性
塗布剤粒子の一部は、被塗物の表面に塗着されずに塗布
室内を浮遊し、静電塗布機を絶縁支持する絶縁支持部材
の表面に付着して、高電圧が印加された静電塗布機から
該絶縁支持部材を通じて接地された塗布室に電流が流れ
、静電塗布機のカップ状体に電圧降下を生じさせて所要
の高電圧が印加されなくなるという問題があった。By the way, some of the conductive coating agent particles sprayed from the cup-shaped body float inside the coating chamber without being coated on the surface of the object to be coated, and the insulating support member that insulates and supports the electrostatic coating machine. A current flows from the electrostatic applicator to which a high voltage is applied to the grounded coating chamber through the insulating support member, causing a voltage drop in the cup-shaped body of the electrostatic applicator to achieve the required amount. There was a problem that high voltage was no longer applied.
そこで本出願人は、実開昭６０−５８２６７号公報に図
示すように、導電性塗布剤を使用する場合には所要風量
で供給された空気を塗布室内に吹き出す空気吹出口が開
口形成された陽圧室を設けると共に、塗布室内に配設さ
れる各静電塗布機の後端を空気吹出口を通じて陽圧室内
に固設された絶縁支持部材に取り付けるようにしている
。Therefore, as illustrated in Japanese Utility Model Application Publication No. 60-58267, the present applicant has proposed that when using a conductive coating agent, an air outlet is formed to blow out air supplied at a required amount into the coating chamber. A positive pressure chamber is provided, and the rear end of each electrostatic coating machine disposed within the coating chamber is attached to an insulating support member fixedly provided within the positive pressure chamber through an air outlet.
即ち、陽圧室内に固設された絶縁支持部材を介して各静
電塗布機を塗布室内に絶縁支持すると共に、陽圧室の空
気吹出口から塗布室内に吹き出す空気によって陽圧室内
への塗布剤粒子の侵入を阻止し、陽圧室内に固設された
絶縁支持部材の表面に導電性塗布剤が付着することを防
止している。That is, each electrostatic coating machine is insulated and supported in the coating chamber via an insulating support member fixed in the positive pressure chamber, and the coating inside the positive pressure chamber is carried out by air blown into the coating chamber from the air outlet of the positive pressure chamber. This prevents the intrusion of agent particles and prevents the conductive coating agent from adhering to the surface of the insulating support member fixed in the positive pressure chamber.
しかし、このように塗布室に陽圧室を付設して所要風量
の空気を供給すると、コンプレッサ等の圧縮空気供給源
の負荷が大きくなると同時に、塗布室内からの排気量も
増大するという弊害があった。However, when a positive pressure chamber is attached to the coating chamber to supply the required amount of air, this has the disadvantage of increasing the load on the compressed air supply source such as a compressor, and at the same time increasing the amount of exhaust air from the coating chamber. Ta.
即ち、各静電塗布機にはその機体内にカップ状体を高速
回転駆動させるエアモータが内蔵されており、カップ状
体を例えば５０．０００ｒｐｍで回転駆動するためには
該エアモータに５００〜７００１ ／ｍｉｎ程度の圧縮
空気を供給しなければならない。That is, each electrostatic applicator has a built-in air motor that rotates the cup-shaped body at high speed, and in order to rotate the cup-shaped body at a speed of, for example, 50,000 rpm, the air motor has a speed of 500 to 7001/min. It is necessary to supply compressed air at a rate of about 100 min.
したがって、静電塗布機の設置台数が多くなれば各静電
塗布機のエアモータに供給する圧縮空気だけでも大量と
なり、更に陽圧室内への圧縮空気供給量を加えると、大
容量のコンプレッサが必要になると同時に、塗布室内か
らの大量の排気を処理し得る処理設備を設けなければな
らないという問題がある。Therefore, if a large number of electrostatic coating machines are installed, the amount of compressed air supplied to the air motor of each electrostatic coating machine will be large, and if you add the amount of compressed air supplied to the positive pressure room, a large capacity compressor will be required. At the same time, there is the problem that processing equipment must be provided that can process a large amount of exhaust gas from the coating chamber.
そこで本発明は、従来においては静電塗布機の機体内に
配設されたエアモータに供給してそのまま塗布室内に放
出していたエアモータ駆動用の圧縮空気を上記の如き陽
圧室内に送給して有効利用を図り、圧縮空気供給源とな
るコンプレッサ等の容量と、塗布室内からの排気量を大
幅に低減させることを目的とする。Therefore, the present invention supplies compressed air for driving the air motor, which was conventionally supplied to the air motor disposed inside the body of the electrostatic coating machine and released into the coating chamber as it is, into the positive pressure chamber as described above. The purpose is to make effective use of air and significantly reduce the capacity of the compressor, etc. that serves as the compressed air supply source, and the amount of exhaust air from the coating chamber.
この目的を達成するために、本発明は、高電圧が印加さ
れ且つエアモータにより高速回転駆動されるカップ状体
に導電性塗布剤を供給して静電霧化する静電塗布機が、
塗布室内に連通ずる空気吹出口を有する陽圧室内に固設
された絶縁支持部材を介して塗布室内に絶縁支持されて
いる静電塗布装置において、前記静電塗布機の機体内に
配設された前記エアモータに供給されて排出される圧縮
空気が、前記機体に連結された排気管を通じて前記陽圧
室内に導入されるように成されていることを特徴とする
。In order to achieve this object, the present invention provides an electrostatic applicator that supplies a conductive coating agent to a cup-shaped body to which a high voltage is applied and is driven to rotate at high speed by an air motor to electrostatically atomize the coating agent.
In an electrostatic coating device that is insulated and supported within a coating chamber via an insulating support member that is fixedly installed in a positive pressure chamber that has an air outlet that communicates with the coating chamber, The compressed air supplied to and discharged from the air motor is introduced into the positive pressure chamber through an exhaust pipe connected to the aircraft body.
本発明によれば、静電塗布機の機体内に配設されたエア
モータに供給されて排出される圧縮空気が、塗布室内に
直接放出されずに、静電塗布機の機体に連結された排気
管を通じて陽圧室内に導入されるように成されているか
ら、圧縮空気供給源から該陽圧室に直接圧縮空気を供給
する必要がなくなるか、あるいは直接供給すべき圧縮空
気の量を従来よりも大幅に低減させることができると共
に、塗布室内からの排気量も大幅に低減させることがで
きる。According to the present invention, the compressed air supplied to and discharged from the air motor disposed inside the body of the electrostatic coating machine is not directly discharged into the coating chamber, but is connected to the body of the electrostatic coating machine by an exhaust gas. Since the compressed air is introduced into the positive pressure chamber through the pipe, there is no need to supply compressed air directly to the positive pressure chamber from the compressed air supply source, or the amount of compressed air to be directly supplied can be reduced compared to conventional methods. In addition, the amount of exhaust gas from the coating chamber can also be significantly reduced.
以下、本発明を図面に示す具体的な実施例に基づいて説
明する。Hereinafter, the present invention will be explained based on specific embodiments shown in the drawings.
第１図は本発明による静電塗布装置の一例を示す正面側
の断面図、第２図はそれに使用する静電塗布機の一部断
面図である。FIG. 1 is a front sectional view showing an example of an electrostatic coating apparatus according to the present invention, and FIG. 2 is a partial sectional view of an electrostatic coating machine used therein.
図中、１は塗布室２を形成するチャンバであって、所要
速度で水平に搬送される帯状鋼板等の被塗物３を搬入出
する搬入口４及び搬出口（図示せず）が開口形成される
と共に、その内部には被塗物３の上面及び下面に夫々対
向して複数の静電塗布機Ｔが配設されている。In the figure, reference numeral 1 denotes a chamber forming a coating chamber 2, in which an inlet 4 and an outlet (not shown) through which a workpiece 3 such as a strip steel plate, which is transported horizontally at a required speed, is brought in and out are openings. In addition, a plurality of electrostatic coating machines T are disposed inside thereof, facing the upper and lower surfaces of the object 3 to be coated, respectively.
各静電塗布機Ｔは、第２図に示すように、その機体５内
にエアモータ６が配設され、該エアモータ６の回転軸７
の先端に高電圧が印加されるカップ状体８が固着されて
いる。As shown in FIG. 2, each electrostatic coating machine T has an air motor 6 disposed within its body 5, and a rotating shaft 7 of the air motor 6.
A cup-shaped body 8 to which a high voltage is applied is fixed to the tip.
エアモータ６は、接続用継手９に接続された絶縁性の給
気ホース１０を通じてコンプレッサ等の圧縮空気供給源
１１から供給される所要圧力の圧縮空気によって高速回
転せられるように成されている。The air motor 6 is configured to be rotated at high speed by compressed air at a required pressure supplied from a compressed air supply source 11 such as a compressor through an insulating air supply hose 10 connected to a connection joint 9.
また、機体５には、該機体５内に連通ずる接続用継手１
２が固設され、該接続用継手１２にはエアモータ６の外
周に穿設された排気孔１３．１３−から機体５内に排出
された圧縮空気を排気する絶縁性の排気ホース１４が連
結されている。The fuselage 5 also includes a connection joint 1 that communicates with the fuselage 5.
2 is fixedly installed, and an insulating exhaust hose 14 is connected to the connection joint 12 for exhausting compressed air discharged into the fuselage 5 from an exhaust hole 13.13- drilled on the outer periphery of the air motor 6. ing.
そして、上記の如く構成された各静電塗布ｍＴは、塗布
室２内の天井及び床面に夫々絶縁支持部材１５を介して
固設されている。Each electrostatic coating mT configured as described above is fixed to the ceiling and floor of the coating chamber 2 via insulating support members 15, respectively.
各絶縁支持部材１５は、絶縁碍子１６と該絶縁碍子１６
の先端に固着された金属製パイプ等の柱状部材１７とか
ら形成され、塗布室２の床面から上方に向けて固設され
た絶縁碍子１６の上部には鍔形のカバー１８が夫々冠着
されている。Each insulating support member 15 includes an insulator 16 and an insulator 16.
A collar-shaped cover 18 is attached to the top of each insulator 16, which is formed from a columnar member 17 such as a metal pipe fixed to the tip of the insulator 16 and fixed upward from the floor surface of the coating chamber 2. has been done.
１９は、静電塗布機Ｔのカップ状体８から噴霧された導
電性塗布剤粒子が絶縁支持部材１５０表面に付着して絶
縁不良を生ずるのを防止するための保護カバーであって
、絶縁支持部材１５に取付支持された静電塗布機Ｔを挿
通させる所要径の空気吹出口２０が穿設されている。19 is a protective cover for preventing conductive coating agent particles sprayed from the cup-shaped body 8 of the electrostatic applicator T from adhering to the surface of the insulating support member 150 and causing insulation defects; An air outlet 20 of a required diameter is bored through which the electrostatic coating machine T attached and supported by the member 15 is inserted.
この保護カバー１９は、塗布室２の天井及び床面と夫々
平行に所要間隔を保って、その周縁が塗布室２の内壁に
固着され、これによって内部に絶縁支持部材１５を固設
した陽圧室２１が形成されている。This protective cover 19 is parallel to the ceiling and floor of the coating chamber 2, keeping a required distance therebetween, and its periphery is fixed to the inner wall of the coating chamber 2. A chamber 21 is formed.
陽圧室２１内には、静電塗布機Ｔに連結された排気ホー
ス１４の自由端が空気吹出口２０を通って挿入配設され
、エアモータ６に供給して機体５内に排出された圧縮空
気が排気ホース１４を通じて導入されると共に、必要に
応じて圧縮空気供給源１１あるいは給気ファン等の空気
供給源からも所要風量の空気が導入されるように成され
て、内部が常に陽圧状態に維持され、空気吹出口２０を
通じて塗布室２内に空気を吹き出すように成されている
。In the positive pressure chamber 21, the free end of the exhaust hose 14 connected to the electrostatic coating machine T is inserted through the air outlet 20, and the compressed air supplied to the air motor 6 and discharged into the fuselage 5 is disposed. Air is introduced through the exhaust hose 14, and if necessary, a required amount of air is also introduced from the compressed air supply source 11 or an air supply source such as an air supply fan, so that the internal pressure is always positive. The state is maintained such that air is blown out into the coating chamber 2 through the air outlet 20.
一方、チャンバ１外には、絶縁碍子２２によって絶縁支
持された受台２３上に載設した塗布剤供給タンク２４と
、該タンク２４の液面の上方から離隔対向して配設され
た塗布剤分散装置２５と、塗布剤供給タンク２４内に貯
留された導電性塗布剤を塗布剤供給ホース２６を介して
各静電塗布機Ｔに送給する塗布剤供給装置２７とが配設
されている。On the other hand, outside the chamber 1, there is a coating agent supply tank 24 mounted on a pedestal 23 insulated and supported by an insulator 22, and a coating agent disposed facing away from above the liquid level of the tank 24. A dispersion device 25 and a coating agent supply device 27 that feeds the conductive coating agent stored in the coating agent supply tank 24 to each electrostatic coating machine T via a coating agent supply hose 26 are provided. .
塗布剤分散装置２５は、塗布剤供給タンク２４の上方に
吊設されて、塗布剤補給タンク２８から塗布剤補給ホー
ス２９を介して圧送される塗布剤がエアホース３０から
供給される圧縮空気により比較的粗い粒子に分散霧化さ
れて塗布剤供給タンク２４内に補給されるように成され
ている。The coating agent dispersion device 25 is suspended above the coating agent supply tank 24 , and the coating agent is pumped from the coating agent supply tank 28 through the coating agent supply hose 29 and is compared with the compressed air supplied from the air hose 30 . It is configured to be dispersed and atomized into coarse particles and supplied into the coating agent supply tank 24.
なお、３１は塗布剤供給タンク２４水位を検出して、塗
布剤補給ホース２９を通じて塗布剤分散装置２５に塗布
剤を送給する圧送ポンプ３２を制御することにより、塗
布剤供給タンク２４内に貯留された塗布剤の水位を常時
一定に維持させる気泡式液面計であって、塗布剤供給タ
ンク２４の液中に塩化ビニル等の絶縁性材で製作された
パイプ３３を通じて空気又は不活性ガスを放出させ、測
定レベルの値を空気圧に変換してその圧力を測定するよ
うに成されている。Note that 31 detects the water level of the coating agent supply tank 24 and controls the pressure pump 32 that supplies the coating agent to the coating agent dispersing device 25 through the coating agent supply hose 29, thereby storing the coating agent in the coating agent supply tank 24. This is a bubble type liquid level gauge that constantly maintains the water level of the applied coating agent at a constant level. The system is configured to release air, convert the measured level value into air pressure, and measure the pressure.
また、塗布剤供給装置２７は、塗布剤供給ホース２６に
介装されて塗布剤供給タンク２４内の塗布剤を各静電塗
布機Ｔに供給する圧送ポンプ３４と、該ポンプ３４を駆
動する電動モータ３５とから構成されている。The coating agent supply device 27 also includes a pressure pump 34 that is connected to the coating agent supply hose 26 and supplies the coating agent in the coating agent supply tank 24 to each electrostatic applicator T, and an electric motor that drives the pump 34. It is composed of a motor 35.
塗布剤供給ホース２６は、その一端が塗布剤供給タンク
２４に接続され、他端がチャンバ１の側壁に貫設された
引込碍子３６に挿通されて塗布室２の陽圧室２１内に延
長され、各空気吹出口２０を通じて静電塗布機Ｔに接続
されている。The coating agent supply hose 26 has one end connected to the coating agent supply tank 24 and the other end inserted into a retractable insulator 36 provided through the side wall of the chamber 1 and extended into the positive pressure chamber 21 of the coating chamber 2. , are connected to the electrostatic coating machine T through each air outlet 20.
なお、図示は省略するが、各静電塗布機Ｔのカップ状体
８には、チャンバ１外に配設された直流高電圧発生器か
ら高電圧ケーブルを介して高電圧が印加されるように成
されている。Although not shown, a high voltage is applied to the cup-shaped body 8 of each electrostatic coating machine T via a high voltage cable from a DC high voltage generator disposed outside the chamber 1. has been completed.
以上が、図面に示す静電塗布装置の全体構成であり、次
にその作用について説明する。The above is the overall configuration of the electrostatic coating device shown in the drawings, and its operation will now be described.
まず、各静電塗布機Ｔのカップ状体８に例えばＤＣ−８
０〜１２０Ｋｖ程度の高電圧を印加させると共に、圧縮
空気供給源１１を作動させて給気ホース１０を通じて機
体５内のエアモータ６に５００〜７００１／ｍ：ｎの圧
縮空気を供給し、エアモータ６の回転軸７の先端に固設
されたカップ状体８を約５０． ＯＯＯｒｐｍで高速回
転駆動させる。First, the cup-shaped body 8 of each electrostatic coating machine T is coated with a DC-8, for example.
At the same time as applying a high voltage of about 0 to 120 Kv, the compressed air supply source 11 is operated to supply compressed air of 500 to 7001/m:n to the air motor 6 in the aircraft body 5 through the air supply hose 10. The cup-shaped body 8 fixed to the tip of the rotating shaft 7 is approximately 50 mm long. Drive at high speed rotation at OOOrpm.
この状態で、塗布剤供給装置２７を作動させて塗布剤供
給タンク２４内に貯留された導電性塗布剤を塗布剤供給
ホース２６を通じて各静電塗布機Ｔに送給すると同時に
、被塗物３を所定速度で連続的に搬送させる。In this state, the coating agent supply device 27 is operated to feed the conductive coating agent stored in the coating agent supply tank 24 to each electrostatic coating machine T through the coating agent supply hose 26, and at the same time is continuously conveyed at a predetermined speed.
これにより、静電塗布機Ｔに供給された塗布剤が、カッ
プ状体８の先端から静電気力及び遠心力により微粒化さ
れて噴霧され、被塗物３の表面に静電塗着されていく。As a result, the coating agent supplied to the electrostatic applicator T is atomized and sprayed from the tip of the cup-shaped body 8 by electrostatic force and centrifugal force, and is electrostatically applied to the surface of the object 3 to be coated. .
ここで、静電塗布機Ｔのカップ状体８から噴霧された塗
布剤粒子の一部が、被塗物３の表面に静電塗着されずに
塗布室２内を浮遊するが、各静電塗布機Ｔを絶縁支持す
る絶縁支持部材１５が固設された陽圧室２１内には、エ
アモータ６に供給して排出される圧縮空気が静電塗布機
Ｔの機体５に連結された排気ホース１４を通じて導入さ
れているから、陽圧室２１内が陽圧状態に維持されて各
空気吹出口２０がら空気が吹き出されている。Here, some of the coating agent particles sprayed from the cup-shaped body 8 of the electrostatic coating machine T float in the coating chamber 2 without being electrostatically coated on the surface of the object 3 to be coated. In a positive pressure chamber 21 in which an insulating support member 15 that insulatingly supports the electrostatic coating machine T is fixed, compressed air supplied to the air motor 6 and discharged is connected to an exhaust gas connected to the body 5 of the electrostatic coating machine T. Since the air is introduced through the hose 14, the inside of the positive pressure chamber 21 is maintained at a positive pressure state, and air is blown out from each air outlet 20.
したがって、塗布室内を浮遊する導電性塗布剤粒子が、
該陽圧室２１内に侵入して絶縁支持部材１５の絶縁碍子
１６や柱状部材１７の表面に付着することが防止される
。Therefore, the conductive coating agent particles floating in the coating chamber are
This prevents the particles from entering the positive pressure chamber 21 and adhering to the surfaces of the insulators 16 and columnar members 17 of the insulating support member 15.
これにより、静電塗布機Ｔのカップ状体８に印加された
高電圧が絶縁支持部材１５を介して塗布室２を形成する
チャンバ１にリークして電圧降下を生じさせることが防
止される。This prevents the high voltage applied to the cup-shaped body 8 of the electrostatic coating machine T from leaking into the chamber 1 forming the coating chamber 2 via the insulating support member 15 and causing a voltage drop.
また、本発明においては、エアモータ６に供給して排出
される圧縮空気を、従来のように機体５から直接塗布室
２内に放出させずに、陽圧室２１内に導入して該陽圧室
２１内を陽圧状態に維持させるために利用しているから
、従来の如く陽圧室２１内に別途圧縮空気を供給する必
要がなく、塗布室２内からの排気量が増大することもな
い。Furthermore, in the present invention, the compressed air supplied to the air motor 6 and discharged is not directly discharged from the body 5 into the application chamber 2 as in the past, but is introduced into the positive pressure chamber 21 and the positive pressure is Since it is used to maintain the positive pressure inside the chamber 21, there is no need to separately supply compressed air into the positive pressure chamber 21 as in the past, and the amount of exhaust air from inside the coating chamber 2 does not increase. do not have.
なお、エアモータ６からの排気量のみによっては陽圧室
２１内への塗布剤粒子の侵入を阻止し得ない場合には、
圧縮空気供給源１１や給気ファン等から不足分に相当す
る量の空気を陽圧室２１内に直接供給して補填すればよ
い。Note that if it is not possible to prevent coating agent particles from entering the positive pressure chamber 21 only by the exhaust amount from the air motor 6,
The amount of air corresponding to the shortage can be directly supplied into the positive pressure chamber 21 from the compressed air supply source 11, an air supply fan, etc. to compensate.
この場合には、陽圧室２１内に供給すべき所要風量から
エアモータ６の排気量を相殺した量の空気を圧縮空気供
給源１１や給気ファン等から供給すればよいから、圧縮
空気供給源１１等の容量を従来よりも大幅に低減させて
省エネルギー化を図ることができると共に、塗布室２内
からの排気量も従来に比して大幅に低減させることがで
きる。In this case, it is sufficient to supply from the compressed air supply source 11, the air supply fan, etc. an amount of air that is the required air volume to be supplied into the positive pressure room 21 by offsetting the displacement of the air motor 6. It is possible to save energy by significantly reducing the capacity of 11, etc., compared to the conventional one, and the amount of exhaust gas from the coating chamber 2 can also be significantly reduced compared to the conventional one.
また、本発明による効果ではないが、塗布剤供給タンク
２４及び塗布剤供給装置２７が絶縁碍子２２．２２によ
り絶縁支持された受台２３に載設されて電気的絶縁状態
に維持されると共に、塗布剤供給タンク２４と塗布剤分
散装置２５とが電気的に絶縁離隔されて高電圧が遮断さ
れるように成されているから、静電塗布機Ｔのカップ状
体８に印加された高電圧が塗布剤補給タンク２８にリー
クするなどしてカップ状体８の先端で電圧降下を生じさ
せることもない。Furthermore, although this is not an effect of the present invention, the coating agent supply tank 24 and coating agent supply device 27 are mounted on the pedestal 23 that is insulated and supported by the insulators 22 and 22, and are maintained in an electrically insulated state. Since the coating agent supply tank 24 and the coating agent dispersion device 25 are electrically insulated and separated from each other so that high voltage is cut off, the high voltage applied to the cup-shaped body 8 of the electrostatic coating machine T is There is no possibility that a voltage drop will occur at the tip of the cup-shaped body 8 due to leakage into the coating agent replenishment tank 28.
なお、上記実施例においては、静電塗布機Ｔの機体５内
に配設されたエアモータ６から排出される圧縮空気を機
体５に連結した排気ホース１４を通じて陽圧室２１内に
導入させる場合について説明したが、本発明はこれに限
らず、例えば第３図に示すように給気ホース１０を通じ
て機体５内のエアモータに供給された圧縮空気が、金属
製パイプ等で成形された柱状部材１７内に排出されて、
該柱状部材１７の後端部周面に穿設された多数の穿孔４
０．４０−・−を通じて陽圧室２１内に直接導入される
ようにしてもよい。In the above embodiment, the compressed air discharged from the air motor 6 disposed in the body 5 of the electrostatic coating machine T is introduced into the positive pressure chamber 21 through the exhaust hose 14 connected to the body 5. Although described above, the present invention is not limited to this. For example, as shown in FIG. 3, the compressed air supplied to the air motor in the aircraft body 5 through the air supply hose 10 is is discharged into
A large number of holes 4 are formed on the peripheral surface of the rear end of the columnar member 17.
0.40-.-- may be introduced directly into the positive pressure chamber 21.
つまり、機体５内から排出される圧縮空気を陽圧室２１
内に導入する排気管は、第２図に示すような排気ホース
１４に限らず、中空パイプに形成された柱状部材１７で
あってもよい。In other words, the compressed air discharged from inside the fuselage 5 is transferred to the positive pressure chamber 21.
The exhaust pipe introduced into the interior is not limited to the exhaust hose 14 as shown in FIG. 2, but may be a columnar member 17 formed in a hollow pipe.
以上述べたように、本発明によれば、静電塗布機のカッ
プ状体を高速回転駆動させるエアモータに供給されて排
出される圧縮空気を、従来の如（塗布室内に直接排気せ
ずに静電塗布機の機体に連結された排気管を通じて陽圧
室内に導入することとしているから、陽圧室内の所要風
量が比較的少ない場合には咳陽圧室内に別途空気を供給
する必要がなく、また陽圧室内の所要風量が多い場合に
もエアモータに圧縮空気を供給するコンプレッサや給気
ファン等の空気供給源から陽圧室内に別途供給すべき空
気の量が非常に少なくて済むから、空気供給源の容量を
小さくすることができると同時に、塗布室内からの総排
気量も大幅に低減させることができるという優れた効果
がある。As described above, according to the present invention, the compressed air supplied to and discharged from the air motor that drives the cup-shaped body of the electrostatic coating machine at high speed can be statically discharged without being directly exhausted into the coating chamber. Since it is introduced into the positive pressure room through the exhaust pipe connected to the body of the electrocoating machine, there is no need to separately supply air into the positive pressure room when the required air volume in the positive pressure room is relatively small. Furthermore, even if the required air volume in the positive pressure room is large, the amount of air that must be separately supplied into the positive pressure room from an air supply source such as a compressor or air supply fan that supplies compressed air to the air motor is very small. This has the excellent effect of being able to reduce the capacity of the supply source and, at the same time, significantly reducing the total amount of exhaust gas from the coating chamber.
第１図は本発明による静電塗布装置の一例を示す正面側
の断面図、第２図はそれに使用する静電塗布機の一部断
面図、第３図は本発明の他の実施例を示す要部の説明図
である。
符号の説明
Ｔ−一静電塗布機、２−塗布室、３・・−被塗物、５一
機体、６・−・エアモータ、８・−カップ状体、１〇−
給気ホース、１１−・圧縮空気供給源（コンプレッサ）
、１３・−排気孔、１４−・−排気ホース（排気管）、
１５−絶縁支持部材、１６−絶縁碍子、１７・・・柱状
部材（排気管）、２０−空気吹出口、２１−陽圧室、４
〇−穿孔。FIG. 1 is a sectional view of the front side showing an example of an electrostatic coating device according to the present invention, FIG. 2 is a partial sectional view of an electrostatic coating machine used therein, and FIG. 3 is a sectional view of another embodiment of the present invention. FIG. Description of symbols T--Electrostatic coating machine, 2-Coating chamber, 3...-Object to be coated, 5-- Machine body, 6-- Air motor, 8-- Cup-shaped body, 10-
Air supply hose, 11-・Compressed air supply source (compressor)
, 13--exhaust hole, 14--exhaust hose (exhaust pipe),
15-insulating support member, 16-insulator, 17-column member (exhaust pipe), 20-air outlet, 21-positive pressure chamber, 4
〇-Perforation.
Claims (1)
れるカップ状体に導電性塗布剤を供給して静電霧化する
静電塗布機が、塗布室内に連通する空気吹出口を有する
陽圧室内に固設された絶縁支持部材を介して塗布室内に
絶縁支持されている静電塗布装置において、前記静電塗
布機の機体内に配設された前記エアモータに供給されて
排出される圧縮空気が、前記機体に連結された排気管を
通じて前記陽圧室内に導入されるように成されているこ
とを特徴とする静電塗布装置。An electrostatic coating machine that supplies a conductive coating agent to a cup-shaped body to which a high voltage is applied and is driven to rotate at high speed by an air motor and electrostatically atomizes the coating material is installed in a positive pressure chamber that has an air outlet that communicates with the coating chamber. In an electrostatic coating device that is insulated and supported within a coating chamber via a fixed insulating support member, compressed air is supplied to and discharged from the air motor disposed inside the body of the electrostatic coating machine, An electrostatic coating device characterized in that it is introduced into the positive pressure chamber through an exhaust pipe connected to the body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16402185A JPS6227057A (en) | 1985-07-26 | 1985-07-26 | Electrostatic coating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16402185A JPS6227057A (en) | 1985-07-26 | 1985-07-26 | Electrostatic coating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6227057A true JPS6227057A (en) | 1987-02-05 |
Family
ID=15785279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16402185A Pending JPS6227057A (en) | 1985-07-26 | 1985-07-26 | Electrostatic coating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6227057A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014193462A (en) * | 2013-03-28 | 2014-10-09 | Enjet Co Ltd | Spray nozzle and coating system using the same |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5858856B2 (en) * | 1977-09-29 | 1983-12-27 | 株式会社東芝 | oscillation device |
| JPS59209668A (en) * | 1984-05-07 | 1984-11-28 | Toyota Motor Corp | Rotary atomizing electrostatic applicator |
| JPS6058267B2 (en) * | 1977-05-10 | 1985-12-19 | 東洋紡績株式会社 | Composition for powder coatings |
-
1985
- 1985-07-26 JP JP16402185A patent/JPS6227057A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6058267B2 (en) * | 1977-05-10 | 1985-12-19 | 東洋紡績株式会社 | Composition for powder coatings |
| JPS5858856B2 (en) * | 1977-09-29 | 1983-12-27 | 株式会社東芝 | oscillation device |
| JPS59209668A (en) * | 1984-05-07 | 1984-11-28 | Toyota Motor Corp | Rotary atomizing electrostatic applicator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014193462A (en) * | 2013-03-28 | 2014-10-09 | Enjet Co Ltd | Spray nozzle and coating system using the same |
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