JPS5976565A - Method and device for electrostatic painting - Google Patents

Method and device for electrostatic painting

Info

Publication number
JPS5976565A
JPS5976565A JP18375682A JP18375682A JPS5976565A JP S5976565 A JPS5976565 A JP S5976565A JP 18375682 A JP18375682 A JP 18375682A JP 18375682 A JP18375682 A JP 18375682A JP S5976565 A JPS5976565 A JP S5976565A
Authority
JP
Japan
Prior art keywords
switch
voltage
circuit
short
power supply
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.)
Granted
Application number
JP18375682A
Other languages
Japanese (ja)
Other versions
JPS6326611B2 (en
Inventor
Tatsuo Kimura
達夫 木村
Osamu Takeda
修 武田
Yoshikazu Kasahara
笠原 義和
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.)
Origin Electric Co Ltd
Original Assignee
Origin Electric 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 Origin Electric Co Ltd filed Critical Origin Electric Co Ltd
Priority to JP18375682A priority Critical patent/JPS5976565A/en
Publication of JPS5976565A publication Critical patent/JPS5976565A/en
Publication of JPS6326611B2 publication Critical patent/JPS6326611B2/ja
Granted legal-status Critical Current

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  • Application Of Or Painting With Fluid Materials (AREA)
  • Electrostatic Spraying Apparatus (AREA)

Abstract

PURPOSE:To improve the life of a switch for short circuiting and to perform safe and efficient electrostatic painting by changing over said switch to a high speed or low speed operation according to the substrate and the ambient conditions thereof and performing electrostatic painting. CONSTITUTION:A current detector 8 detects the painting current flowing from the secondary winding terminal of a boosting transformer 2 through the detector 8, a substrate 7, an electrostatic painter 6, resistors 4, 5, and a multiplicated voltage rectifier 3. The start switch 1a of an AC power source 1 opens before the next substrate is brought to the device, then a switch 11d is closed and the current of a rated voltage flows in a solenoid 12a for driving a switch 12 for short circuiting. The speed for short circuiting the switch 12 increases when the driving voltage to be impressed on the solenoid 12a exceeds the rated value. When the solenoid 12a is driven at the rated voltage, the speed for closing the switch 12 is lower as compared to the case of over driving. The impact force on the electrodes 12b and 12c in the stage of closing the switch is thus decreased.

Description

【発明の詳細な説明】 本発明は塗装作業を安全かつ能率的に行うための保獲機
能を与え得る静電塗装方法及び装置に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrostatic coating method and apparatus capable of providing a retention function for performing coating operations safely and efficiently.

最近の工業用静電塗装ラインにあっては、火花放電の発
生による火災の防止などの安全面から、被塗装物が塗装
位置又はその他く近傍に至るまで静電塗装用高電圧電極
に直流高電圧を印加せず、かつ短絡用スイッチを閉成状
態に維持することにより前記高電圧電極を接地電位に固
定している。
In recent industrial electrostatic painting lines, for safety reasons such as preventing fires caused by spark discharge, high voltage electrodes for electrostatic painting are used to apply high voltage voltage to the high voltage electrode for electrostatic painting until the object to be painted reaches the painting position or other vicinity. The high voltage electrode is fixed at ground potential by not applying any voltage and keeping the shorting switch closed.

そして被塗装物が塗装位置又はその極く近傍に移動して
来た時点で短絡用スイッチを開放すると共に、高電圧電
極に直流高電圧全印加することが行われている。
When the object to be coated moves to or very close to the coating position, the short-circuit switch is opened and the full DC high voltage is applied to the high voltage electrode.

例えば自動車などの工業用静電塗装ラインにおいては、
1分間に一台程度の被@装物を塗装するために短絡用ス
イッチの開閉回数は数千回7日以上にもなるが、これに
比べて火花放電発生の予知により短絡用スイッチを動作
させる回数は非常に少ない。
For example, in industrial electrostatic painting lines such as automobiles,
In order to paint about one object per minute, the short-circuit switch must be opened and closed several thousand times over seven days, but compared to this, the short-circuit switch is activated by predicting the occurrence of spark discharge. The number of times is very small.

しかし火花放電発生の予知により短絡用スイッチを動作
させる場合、種々な条件におけるなるべく多くの火花放
電の発生を防止するためには可能な限り短絡用スイッチ
金高速度で短絡動作させねばならない。従って従来は、
すべての場合におい程度印加して、短絡用スイッチを高
速駆動しているが、短絡用機械的スイッチの衝撃力はそ
の動作速度の2乗に比例するために、短絡用スイッチの
寿命が大幅に短くなり、頻繁に短絡用スイッチを交換し
なければならなかった。しかしながら前述した様に、火
花放電発生の予知により短絡用スイッチを動作させる場
合には出来る限シ高速度で短絡動作させた方が好ましい
が、この様な外宮時動作が必要とこれる回数は定常時動
作、つまり定常時における電源の消勢に同期して行われ
る短絡動作の回数に比べて確率的に極めて少々く、そし
て短絡動作のほとんどを占める定常時動作の場合には短
絡用スイッチが高速で動作する必要は5ないことが分っ
た。
However, when the short-circuit switch is operated based on the prediction of the occurrence of spark discharge, the short-circuit switch must be operated as fast as possible in order to prevent the occurrence of as many spark discharges as possible under various conditions. Therefore, conventionally,
In all cases, the short-circuiting switch is driven at high speed by applying a certain amount of force, but since the impact force of the mechanical short-circuiting switch is proportional to the square of its operating speed, the life of the shorting switch is significantly shortened. The short circuit switch had to be replaced frequently. However, as mentioned above, when operating the short-circuiting switch based on the prediction of spark discharge, it is preferable to operate the short-circuiting switch at the highest possible speed, but the number of times that such an operation is necessary is limited to the number of times during normal operation. In other words, the probability is extremely small compared to the number of short-circuit operations that are performed in synchronization with the de-energization of the power supply during steady-state operation, and in the case of steady-state operation, which accounts for most of the short-circuit operations, the short-circuit switch is fast. It turns out that it doesn't need to work.

本発明は斯かる静電塗装特有な点に関する知見に基づき
、塗装ラインを搬送される被塗装物及びその周囲の状態
に応じて短絡用スイッチ全高速動作、又は低速動作に切
換えて静電塗装を行うことにより、短絡用スイッチの寿
命を大幅に向上させ得ることを特徴としている。
The present invention is based on the knowledge regarding the peculiarities of electrostatic coating, and the present invention performs electrostatic coating by switching the short-circuit switch to full high-speed operation or low-speed operation depending on the condition of the workpiece being conveyed through the coating line and its surroundings. By doing so, the life of the short-circuit switch can be significantly improved.

以下に第1図乃至第6図により本発明の一実施例を説明
する。
An embodiment of the present invention will be described below with reference to FIGS. 1 to 6.

第1図において、1は起動スイッチIak含む通常の高
周波インバータなどからなる交流電源、2は1次巻線N
1と2次巻線N2とt有する昇圧用トランス、6はコツ
ククロフトウオルトン回路の様な通常の多倍電圧整流装
置、4.5は夫々限流用抵抗、6は静電塗装機、7は被
塗装物、8は電流検出器、9は電流検出器8からの電流
検出信号又はこの電流検出信号を追補に処理した信号が
基準値を越えるとき火花放電発生の前兆であると判断し
て火花放電子知信号を出力する火花放電発生予知回路、
10は回路9からの火花放電子知信号を受けて駆動信号
S(1と遮断信号Scを生ずる回路、11は駆動回路で
あって第1の駆動用直流電源11a、第1の直流電源1
1&の電圧よシ数倍乃至士数倍程度の電圧を有する第2
の駆動用直流電源11b、回路10からの駆動信号i9
dで駆動さ九るトランジスタスイッチ11C1交流電源
1の起動スイッチ1aの開、閉に同期して閉、開するス
\ イッチ11d、逆流阻止用ダイオード11e及びフライ
ホイールダイオード11ffxどからカリ、12は駆動
用電磁ソレノイド12a1可動電極12b及び固定電極
120などからなる短絡用スイッチである。
In Fig. 1, 1 is an AC power source consisting of a normal high-frequency inverter including a starting switch Iak, and 2 is a primary winding N.
1 and a step-up transformer with secondary windings N2 and t, 6 is a normal multiplier voltage rectifier such as a Kotscroft-Walton circuit, 4.5 is a current limiting resistor, 6 is an electrostatic coating machine, and 7 is a The object to be painted, 8 is a current detector, 9 is a current detection signal from the current detector 8, or a signal obtained by processing this current detection signal as an additional value, and when it exceeds a reference value, it is determined that it is a sign of spark discharge and sparks are generated. A spark discharge prediction circuit that outputs a discharge notification signal;
10 is a circuit that receives a spark discharge notification signal from the circuit 9 and generates a drive signal S (1) and a cutoff signal Sc; 11 is a drive circuit that includes a first driving DC power supply 11a;
The second voltage has a voltage that is several times higher than the voltage of 1&.
The driving DC power supply 11b, the driving signal i9 from the circuit 10
The transistor switch 11C1 is driven by the switch 11C1, which closes and opens in synchronization with the opening and closing of the starting switch 1a of the AC power source 1. The switch 11d, the backflow blocking diode 11e, and the flywheel diode 11ffx are driven by This is a short circuit switch consisting of an electromagnetic solenoid 12a1, a movable electrode 12b, a fixed electrode 120, etc.

次に斯かる構成の静電塗装装置の動作について説明する
Next, the operation of the electrostatic coating apparatus having such a configuration will be explained.

時刻t1で交流電源1における起動スイッチ1aが第2
1囚で示される様に閉成さfすると、直流高電圧出力は
同図(81に示す様に成る時間、例えば1秒後に定格出
力の9 ’OK Vに達する。また起動スイッチ1aの
閉成に伴い、これと同期してスイッチ11dが第2図(
C)において示す様に開き、従って短絡用スイッチ12
の駆動用ソレノイド12aは同図[F])で示す様に消
勢される。ソレノイド12aの消勢に伴い可動電ff1
12bは矢印Y方向に移行し、固定電極120は接地電
位から解放され、静電塗装装置には直流高電圧が印加芒
れる。電流検山型8は、昇圧用トランス2の2次巻線端
子から電流検出器8、接地、被塗装物7、塗装空間、静
電塗装機6、限流用抵抗5.4及び多倍電圧整流装置6
を介して流れる塗装電流を検出し7ている。
At time t1, the start switch 1a in the AC power supply 1 switches to the second
When the switch is closed as shown in Figure 1, the DC high voltage output reaches the rated output of 9' OK V after a period of time, e.g., 1 second, as shown in Figure 81. Accordingly, in synchronization with this, the switch 11d switches to the state shown in FIG.
As shown in C), the switch 12 opens and therefore shorts.
The driving solenoid 12a is deenergized as shown in [F]) in the same figure. As the solenoid 12a is deenergized, the movable electric current ff1
12b moves in the direction of arrow Y, the fixed electrode 120 is released from the ground potential, and a high DC voltage is applied to the electrostatic coating device. The current detection type 8 connects the secondary winding terminal of the step-up transformer 2 to the current detector 8, the ground, the object to be painted 7, the painting space, the electrostatic coating machine 6, the current limiting resistor 5.4, and the multiplier voltage rectifier. Device 6
The coating current flowing through the sensor is detected.

次に時刻t2において、今まで塗装領域にあった被塗装
物の移動に伴い塗装領域から外れると、次の被@装物が
@装領域に移動して来るまで、安全確保のために先ず交
流電源1における起動スイッチ1aが開かれ、電源部は
作動停止する、これに伴い起動スイッチ1aと差動的に
動作するスイッチ11dが閉成づれ、第1の駆動用電源
11.aがらスイッチ11d及びダイオード11 e 
’c介して短絡用スイッチ12の駆動用ソノノイド12
aに電流が流れる(第2図■)。このとき駆動用ソレノ
イド12=に印加される駆動電圧は第6図に示す様に定
格電圧vL1例えば20vである。
Next, at time t2, when the object to be coated that has been in the coating area moves and leaves the coating area, the exchange is first performed to ensure safety until the next object to be coated moves to the coating area. The starting switch 1a in the power source 1 is opened, and the power supply section stops operating.Accompanyingly, a switch 11d that operates differentially with the starting switch 1a is closed, and the first driving power source 11. a, switch 11d and diode 11e
Sononoid 12 for driving short-circuit switch 12 through 'c
A current flows through a (Fig. 2 ■). At this time, the drive voltage applied to the drive solenoid 12= is the rated voltage vL1, for example, 20V, as shown in FIG.

ここで第6図を用いて短絡用スイッチ12の動作速度に
ついて簡単に説明すると、図からも明らかな様に短絡用
スイッチ12の短絡動作速度はソレノイド12aに印加
される駆動電圧が定格値V14を越えると指数関数的に
犬きくなり、つ1#)動作所要時間は短くなシ、例えば
定格1駆動電圧VLを約2[]Vとし、約140Vのオ
ーバドライブ電圧■□でソレノイド124を駆動する場
合にはその動作速度は約10倍になる。逆に言えば駆動
用ソレノイド12ak定格電圧で駆動した場合には短絡
用スイッチ12の開成動作速度は、オーバードライブし
た場合に比べてかなり小さく、閉成時における電極12
bと12Cの衝撃刃金大幅に低減できるのである。
Here, the operating speed of the short-circuiting switch 12 will be briefly explained using FIG. If it exceeds the voltage, the voltage becomes exponentially sharper, and the required operation time is short.For example, set the rated 1 drive voltage VL to about 2[]V, and drive the solenoid 124 with an overdrive voltage of about 140V. In this case, the operating speed increases approximately 10 times. Conversely, when the drive solenoid 12ak is driven at the rated voltage, the opening operation speed of the short circuit switch 12 is considerably lower than when overdriven, and the electrode 12 when closed is considerably smaller.
B and 12C impact blades can be significantly reduced.

そして短絡用スイッチ12の閉成に伴い、静電塗装機6
と被塗装物7間の電荷及びケーブルに充電された電荷な
どが短絡用スイッチ12を介して放電さtt、静電塗装
機6の高圧荷電部は接地電位とほぼ等しい電圧に低下し
、保持てれる。この状態では火花放電の発生による火災
、或いは感電事故が発生する危険性はない。
Then, with the closing of the short circuit switch 12, the electrostatic coating machine 6
The electric charge between the terminal and the object to be painted 7 and the electric charge charged in the cable are discharged via the short-circuit switch 12, and the high-voltage charging part of the electrostatic coating machine 6 drops to a voltage almost equal to the ground potential and is maintained. It will be done. In this state, there is no risk of fire or electric shock due to spark discharge.

この様に谷部75:定常的なオン、オフ動作を繰り返し
て塗装ラインにおけ−るwi塗装物を次々に静電塗装し
ている途中の時刻t3で、電流検出器8により検出され
た電流が異常状態を呈することにより火花放電発生予知
回路9が火花放電子矧信号を回路10に与えると、回路
10は第2図0に示すような所定パルス幅の駆動信号S
dをトランジスタスイッチ11cのベースに印加してこ
れをターンオンさせると同時に、遮断信号SCを交流電
源1に与えてその起動スイッチ1aを開く(第2図(A
))。
In this way, the valley 75: The current detected by the current detector 8 at time t3 during the electrostatic coating of the objects on the coating line one after another by repeating steady on and off operations. When the spark discharge prediction circuit 9 gives a spark discharge signal to the circuit 10 due to an abnormal state, the circuit 10 outputs a drive signal S of a predetermined pulse width as shown in FIG.
d is applied to the base of the transistor switch 11c to turn it on, and at the same time, a cutoff signal SC is applied to the AC power supply 1 to open the starting switch 1a (see Fig. 2 (A).
)).

トランジスタスイッチ11Cのターンオンにより短絡用
スイッチ12の駆動用ソレノイド12aは第1、第2の
駆動用電源11aと11bの電圧の和に依存する高い駆
動電圧■□で駆動される。従って前述の通シ短絡用スイ
ッチ12の可動電極12bは矢印X方向に高速で飛び出
して固定電極12Cに衝接し、数ミリ秒以下の短時間で
直流高圧側を接地電位゛まで降下させる。一方、回路1
0からの遮断信号SCによシ交流電源1における起動ス
イッチ1aが開くのに伴いスイッチ11dは閉じるが、
第1、第2の駆動用電源11a、11bの電圧値の関係
からトランジスタスイッチ11Cがオンしている期間は
ダイオード11eは逆バイアス芒れている。回路10か
らの駆動信号Sdがトランジスタスイッチ11Cのベー
スから消失し、トランジスタスイッチi iCk通流す
る電流が急速に減少してダイオード11eが順バイアス
状態に至ると、以後短絡用スイッチ12の駆動用ソレノ
イド12&は第1の駆動用電源11aによる定格電圧V
Lで駆動され、短絡用スイッチ12は短絡状態を保持し
続ける(第2図G))。そして火花放電発生の危険が無
くなると、古び交流電源1の起動スイッチ1aが閉じら
れ、これに伴いスイッチ11dが開き、更に短絡用スイ
ッチ12も開くことにより、静電塗装機6が高圧荷電さ
れる。
By turning on the transistor switch 11C, the driving solenoid 12a of the short-circuiting switch 12 is driven with a high driving voltage □ which depends on the sum of the voltages of the first and second driving power supplies 11a and 11b. Therefore, the movable electrode 12b of the above-mentioned open/short switch 12 jumps out at high speed in the direction of the arrow X and collides with the fixed electrode 12C, lowering the DC high voltage side to the ground potential in a short time of several milliseconds or less. On the other hand, circuit 1
When the start switch 1a in the AC power supply 1 opens in response to the cutoff signal SC from 0, the switch 11d closes.
Due to the relationship between the voltage values of the first and second driving power supplies 11a and 11b, the diode 11e is reverse biased during the period when the transistor switch 11C is on. When the drive signal Sd from the circuit 10 disappears from the base of the transistor switch 11C and the current flowing through the transistor switch iiCk rapidly decreases and the diode 11e reaches a forward bias state, the solenoid for driving the short-circuit switch 12 12& is the rated voltage V by the first driving power source 11a
The short circuit switch 12 continues to maintain the short circuit state (FIG. 2G)). When the risk of spark discharge disappears, the starting switch 1a of the old AC power supply 1 is closed, the switch 11d is opened, and the short-circuit switch 12 is also opened, so that the electrostatic coating machine 6 is charged with high voltage. .

尚、上記実施例の他に駆動回路の変更例は種々考えられ
、例えば第1、第2の駆動用電源11a、11bを直列
接続せずに別々に設けでも良く、またスイッチ11d及
びダイオード11eに代えて電源1M或いは11b1又
は中間端子を選択するスイッチを設けることにより前記
実施例の様にソノノイドの駆動電圧全切換えることも出
来る。
In addition to the above-mentioned embodiment, various modifications of the drive circuit can be considered. For example, the first and second drive power supplies 11a and 11b may be provided separately instead of being connected in series, and the switch 11d and the diode 11e may be connected separately. Alternatively, by providing a switch for selecting the power source 1M or 11b1 or the intermediate terminal, it is also possible to completely switch the drive voltage of the sononoid as in the above embodiment.

また単一の駆動電源とし、その駆動電源からンVメイド
に至る給電路におけるインピーダンスの大きき全切換え
る方式々と種々な類似回路が考えられるが、本発明の精
神を逸脱しない限り本発明に属する変更例である。
In addition, various similar circuits such as a system in which a single drive power source is used and the power supply path from the drive power source to the N-V made is fully switched with large impedance can be considered, but they belong to the present invention as long as they do not depart from the spirit of the present invention. This is an example of a change.

以上述べた様に本発明によれば、静電塗装状態において
火花放電の発生が予知されたときには短絡用スイッチ全
高速動作させ、定常時における電源の消勢時にはこれと
同期させて短絡用スイッチに低速動作を行わせることに
より、確車的に動作回数の圧倒的に多い低速動作時にお
ける短絡用スイッチの衝撃を低減し、これによシ大幅に
短絡用スイッチの寿命を向上させて安全かつ能率的々静
電塗装を可能にすることが出来る。
As described above, according to the present invention, when spark discharge is predicted to occur during electrostatic coating, the shorting switch is operated at full speed, and when the power is turned off during normal operation, the shorting switch is operated in synchronization with this. By performing low-speed operation, the impact of the short-circuiting switch during low-speed operation, which is the overwhelming number of operations in the vehicle, is reduced, and this greatly extends the life of the short-circuiting switch, making it safe and efficient. It is possible to perform electrostatic coating in a targeted manner.

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

第1図は本発明に係る静電塗装装置の一実施例を示す図
、第2図は第1図における各回路部分\の信号を示す図
、第6図は本発明を実施するのに用いられる短絡用スイ
ッチの動作特性の一例を示す図である。 1・・・又流電源 6・・・多倍電圧整流装置 6・・・静電塗装機 7・・・被塗装物 8・・・電流検出器 9・・・火花放電発生予知回路 1゛1・・・駆動回路 12・・・短絡用スイッチ 特許出願人  オリジン電気株式会社
Fig. 1 is a diagram showing an embodiment of the electrostatic coating device according to the present invention, Fig. 2 is a diagram showing signals of each circuit section in Fig. 1, and Fig. 6 is a diagram showing an embodiment of the electrostatic coating device according to the present invention. It is a figure which shows an example of the operating characteristic of the short-circuit switch. 1... Double current power supply 6... Multiplier voltage rectifier 6... Electrostatic coating machine 7... Object to be painted 8... Current detector 9... Spark discharge occurrence prediction circuit 1゛1 ...Drive circuit 12...Short circuit switch Patent applicant Origin Electric Co., Ltd.

Claims (2)

【特許請求の範囲】[Claims] (1)高電圧電源、該高電圧電源により荷電される静電
塗装用高電圧電極、及びこれら高電圧電源と高電圧電極
間の高電圧線路と低電圧端子とを°短絡的に接続し得る
短絡用スイッチを少くとも備えた静電塗装装置において
、前記高電圧電源の一方の出力端子から被塗装物及び前
記高電圧電極を介してその他方の出力端子に流れる電流
を検出し、該電流の検出値又は該検出値に関連する値が
基準を越えるときにけ胃速の動作速度て前記短絡用スイ
ッチ全短絡動作させ、足常時における高電圧電源の消勢
時にはこれと同期させて前記短絡用スイ゛ツチを前記異
常時の動作速度よりも遅い動作速度で短絡動作ζせるこ
とを特徴とする静電塗装方法。
(1) A high-voltage power supply, a high-voltage electrode for electrostatic coating charged by the high-voltage power supply, and a high-voltage line and low-voltage terminal between these high-voltage power supplies and high-voltage electrodes can be connected in a short-circuit manner. In an electrostatic coating apparatus equipped with at least a short-circuit switch, a current flowing from one output terminal of the high-voltage power supply to the other output terminal via the object to be coated and the high-voltage electrode is detected, and the current is detected. When the detected value or a value related to the detected value exceeds a reference, the shorting switch is operated to short-circuit the entire short-circuiting switch at the operating speed of the gastric speed, and when the high voltage power supply is normally turned off, the shorting switch is operated in synchronization with this when the high-voltage power supply is turned off at all times. An electrostatic coating method characterized in that the switch is operated to short circuit at a lower operating speed than the operating speed at the time of the abnormality.
(2)  高電圧電源、該高電圧電源にょυ荷電される
静T4を塗装用高電圧電極、これら高電圧電源と高電圧
電極間の高電圧線路と低電圧端子とを短絡的に接続し得
る短絡用スイッチ、前記高電圧電源の一方の出力端子か
ら被塗装物品及び前記高電圧電極を介して前記高電圧電
源の他方の出力端子に流れる電流を検出する電流検出器
、該電流検出器からの電流検出信号又はこれに関連する
信号が基準値を越えるとき火花放電発生予知信号を出力
する火花放電発生予知回路、及び該火花放電発生予知回
路からの出力信号を受けて前記短絡用スイッチを作動さ
せ駆動回路を少くとも備えた静電塗装装置VCおいて、
前記火花放電発生予知信号が出力されるとき高レベルの
電力を前記短路用スイッチに駆動電力として与える高レ
ベル電力供給回路部と定常時における前記高電圧電源の
消勢に同期して低レベルの電力を前記短絡用スイッチに
駆動電力として与える低レベル電力供給回路部とを備え
たことを特徴とする静電塗装装置。
(2) A high-voltage power supply, the static T4 charged by the high-voltage power supply can be connected to a high-voltage electrode for painting, and the high-voltage line and low-voltage terminal between these high-voltage power supplies and high-voltage electrodes can be connected in a short-circuit manner. a short circuit switch, a current detector that detects the current flowing from one output terminal of the high voltage power supply to the other output terminal of the high voltage power supply via the article to be coated and the high voltage electrode; A spark discharge occurrence prediction circuit that outputs a spark discharge occurrence prediction signal when the current detection signal or a signal related thereto exceeds a reference value, and actuating the short circuit switch in response to an output signal from the spark discharge occurrence prediction circuit. In an electrostatic coating device VC including at least a drive circuit,
a high-level power supply circuit section that supplies high-level power to the short-circuit switch as driving power when the spark discharge occurrence prediction signal is output; and a low-level power supply circuit section that supplies high-level power as driving power to the short-circuit switch when the spark discharge occurrence prediction signal is output; and a low-level power supply circuit section that supplies the short-circuit switch with driving power.
JP18375682A 1982-10-21 1982-10-21 Method and device for electrostatic painting Granted JPS5976565A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18375682A JPS5976565A (en) 1982-10-21 1982-10-21 Method and device for electrostatic painting

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18375682A JPS5976565A (en) 1982-10-21 1982-10-21 Method and device for electrostatic painting

Publications (2)

Publication Number Publication Date
JPS5976565A true JPS5976565A (en) 1984-05-01
JPS6326611B2 JPS6326611B2 (en) 1988-05-31

Family

ID=16141423

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18375682A Granted JPS5976565A (en) 1982-10-21 1982-10-21 Method and device for electrostatic painting

Country Status (1)

Country Link
JP (1) JPS5976565A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11718922B2 (en) 2019-09-25 2023-08-08 De Nora Permelec Ltd Laminated structure including electrodes

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0246711U (en) * 1988-09-21 1990-03-30

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11718922B2 (en) 2019-09-25 2023-08-08 De Nora Permelec Ltd Laminated structure including electrodes

Also Published As

Publication number Publication date
JPS6326611B2 (en) 1988-05-31

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