JPH0222496A - Multistage current supply-type electrodeposition coating device - Google Patents
Multistage current supply-type electrodeposition coating deviceInfo
- Publication number
- JPH0222496A JPH0222496A JP17026288A JP17026288A JPH0222496A JP H0222496 A JPH0222496 A JP H0222496A JP 17026288 A JP17026288 A JP 17026288A JP 17026288 A JP17026288 A JP 17026288A JP H0222496 A JPH0222496 A JP H0222496A
- Authority
- JP
- Japan
- Prior art keywords
- electrodeposition
- workpiece
- work
- electrodes
- current
- 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
Links
- 238000004070 electrodeposition Methods 0.000 title claims abstract description 56
- 239000011248 coating agent Substances 0.000 title claims abstract description 8
- 238000000576 coating method Methods 0.000 title claims abstract description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000010422 painting Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、多種類のワークを塗装するのに適した？を着
装置に関する。[Detailed Description of the Invention] (Field of Industrial Application) Is the present invention suitable for painting many types of workpieces? Regarding the wearing equipment.
（従来技術）
自動車ボデーのように形状が複雑で、しかも大きなワー
クの塗装には、第３図に示したように断面形状が舟形を
した電着槽ａにワークｂの進行方向に複数の電極ｃＳｄ
Ｓｅを配設し、搬送レールｆによりワークｂを電着槽ａ
中を移動させながら、電極ｃ、ｄ、ｅとワークｂとの間
に電圧Ｅを印加して電着を実行している。なお、図中符
号ｇは電着ＴＩＥ流を供給する電源装置を示す。(Prior art) When painting large workpieces with complex shapes such as automobile bodies, a plurality of electrodes are placed in an electrodeposition tank a with a boat-shaped cross section in the direction of movement of the workpiece b, as shown in Figure 3. cSd
Se is installed, and the workpiece b is transferred to the electrodeposition tank a by the conveyor rail f.
Electrodeposition is performed by applying voltage E between electrodes c, d, and e and workpiece b while moving the workpiece inside. Note that the symbol g in the figure indicates a power supply device that supplies the electrodeposited TIE flow.
しかしながら、電着塗装の一般的現象としてワークが浸
漬した当初には、ワーク表面に膜が形成されていない関
係上、急激な電着電流ｑが流れて（第４図）急速に膜形
成が進行して自動車ボデーのような複数の部材を接合し
てなるワークにあっては、この接合部等の形状の入り組
んだ部分での膜形成が不十分になるという問題があった
。However, as a general phenomenon in electrodeposition coating, when the workpiece is first immersed, a rapid electrodeposition current q flows because no film has been formed on the workpiece surface (Figure 4), and film formation progresses rapidly. In the case of a workpiece made by joining a plurality of members, such as an automobile body, there is a problem in that film formation becomes insufficient at parts with intricate shapes such as the joining parts.
すなわち、被塗装物が凹凸を有する形状のものである場
合には電極と被塗装面との距離のばら付きが大きくなり
、特に！極から遠距離に位置する部分の膜厚が薄くなる
という問題がある。In other words, if the object to be painted has an uneven shape, the distance between the electrode and the surface to be painted will vary greatly, especially! There is a problem in that the film thickness is thinner in parts located far from the poles.
このような問題を解消するため、進行方向に配９＋１し
た複数の電着電極を複数の群に分割し、進行方向側の電
極程印加する電圧を高目に設定して電着初ｌ１月におけ
る過大な電流の発生を防止することも提案されているが
（実開昭５６−７７６１号公報）、常時、電着を極面に
電位差が設定された状態にあるため、低電位側つまり侵
入口側の電着電極には高電位側、つまり排出口側の電極
から電流が流れ込んで電極表面に被膜が形成されること
になり、！極としての機能を喪失するという問題がある
。In order to solve this problem, a plurality of electrodeposited electrodes arranged 9+1 in the direction of movement are divided into groups, and the applied voltage is set higher for the electrodes closer to the direction of movement. It has also been proposed to prevent the generation of excessive current (Utility Model Application Publication No. 56-7761), but since a potential difference is always set on the electrode surface, the low potential side, that is, the entry point. Current flows into the electrodeposited electrode on the side from the high potential side, that is, the electrode on the discharge port side, and a film is formed on the electrode surface. There is a problem that it loses its function as a pole.
（解決しようとする課題）
本発明は、このような問題に鑑みてなされたものであっ
て、ワークの種類に関わりなく、最適な条件となる電着
電流を供給することができる多段式電着塗装装置を提供
することにある。(Problems to be Solved) The present invention has been made in view of these problems, and is a multi-stage electrodeposition method that can supply an electrodeposition current under optimal conditions regardless of the type of workpiece. Our objective is to provide coating equipment.
（課題を解決するための手段）
このような課題を解決するため、本発明においては、ワ
ークの移動経路に沿って列状に配列された複数のｔ着！
極をワークの移動方向に複数の群に分割し、各群の電着
電極を被塗装物に対して順方向となるダイオードを介し
て電着電流調整装置に接続するとともに、電着槽のワー
ク移動経路のｔ着接前方にワークのＩ！類を判別するワ
ーク判定手段を配設し、ワークの種類毎に最適な通電条
件を予め設定した制御手段により、判定手段からの信号
に基づいて電着電流調整装置を制御するようにしてワー
クのｆ！類に対応した最適な電着電流を自動的に選択さ
せて、穏やかな初期被膜の形成と、膜成長過程における
膜成長速度の向上を図りつつ、ダイオードにより電極間
における電流の流れ込みを防止した点にある。(Means for Solving the Problems) In order to solve such problems, in the present invention, a plurality of t-shirts arranged in a row along the movement path of the workpiece!
The electrodes are divided into multiple groups in the moving direction of the workpiece, and the electrodeposition electrodes of each group are connected to the electrodeposition current adjusting device through diodes that are in the forward direction with respect to the workpiece. I of the workpiece in front of the moving route. The electrodeposition current adjusting device is controlled based on the signal from the determination means by a control means that has preset the optimum energization conditions for each type of workpiece. f! The method automatically selects the optimal electrodeposition current corresponding to the type of electrodeposition to form a gentle initial film and improve the film growth rate during the film growth process, while preventing current from flowing between the electrodes using a diode. It is in.
（実施例）
そこで、以下に本発明の詳細を図示した実施例に基づい
て詳細に説明する。(Example) The present invention will now be described in detail based on illustrated examples.
第１図は、本発明の一実施例を示すものであって、図中
符号ｌは、外方にオーバーフロータンク２．２を備えた
断面舟形の電着槽で、ここには搬送経路に沿って複数の
電着電極３．４．５．６が列状に配設されており、内部
に電蓄液ｐが収容され、電着電極３及至６のそれぞれは
、被塗装物側に順方向となるようにダイオード２０．２
１．２２．２３を介してｔ流調整装ａ７．８．９．１０
に接続されている。FIG. 1 shows an embodiment of the present invention, in which reference numeral 1 denotes an electrodeposition tank with a boat-shaped cross section and an overflow tank 2.2 located outside. A plurality of electrodeposited electrodes 3, 4, 5, 6 are arranged in a row, and a capacitor liquid p is housed inside, and each of the electrodeposited electrodes 3 to 6 is arranged in a forward direction toward the object to be coated. diode 20.2 so that
1.22.23 via T flow regulator a7.8.9.10
It is connected to the.
を蓄槽１の上部には、電着槽１の底板の形状に沿うよう
に給電線を兼ねた搬送レール１１が配設されている。１
２は、電着槽１の前方に配役されたワーク判定装置で、
例えば、撮像装置等の形状認識装置や、磁気検出装置等
からなり、レール１１により搬送されてきたワークの形
状や寸法等からワークのｆ！頚を判定してワーク判別信
号を出力するように構成されている。At the top of the storage tank 1, a conveyor rail 11 which also serves as a power supply line is arranged so as to follow the shape of the bottom plate of the electrodeposition tank 1. 1
2 is a workpiece determination device placed in front of the electrodeposition tank 1;
For example, it consists of a shape recognition device such as an imaging device, a magnetic detection device, etc., and f! It is configured to determine the neck and output a workpiece discrimination signal.
１３は、シーケンス制ｇＩｆ装置で、ワークの種類毎に
予め実験を行って求めておいた最適な電着条件をデータ
として格納するとともに、ワーク判別信号により１つの
データを選択するとともに、ワークの移動に一致させて
電流値を読み出し、この？を流値により電流調整装置７
及至１ｏのそれぞれを制御するように構成されている。Reference numeral 13 is a sequence gIF device that stores the optimal electrodeposition conditions determined in advance through experiments for each type of workpiece as data, selects one piece of data based on a workpiece discrimination signal, and moves the workpiece. Read the current value according to this? The current adjustment device 7 according to the current value
to 1o.
次に、このように構成したＨ置の動作を第２図に示した
波形図に基づいて説明する。Next, the operation of the H position configured as described above will be explained based on the waveform diagram shown in FIG.
装置を作動させると、搬送レール１１によりワークＷが
電着槽１に向けて移送され、その途中においてワーク判
定装置ｔ１２を通過する。ワーク判定装置１２は、通過
したワークの種類を判定して判別信号を出力する。シー
ケンス制御装置１３は、判別信号に基づいて格納されて
いる電着条件の中から今通過したワークＷに最適な電着
条件を読み出す。このようにして、ワークＷが入槽を開
始すると、シーケンス制御装置１３は、このワークに適
した籾量電流を発生するように各電流制御装置ｔ７及至
ｌＯを調整する。When the apparatus is operated, the workpiece W is transported by the transport rail 11 toward the electrodeposition tank 1, and passes through the workpiece determination device t12 on the way. The workpiece determination device 12 determines the type of workpiece that has passed and outputs a determination signal. The sequence control device 13 reads out the optimal electrodeposition conditions for the workpiece W that has just passed from among the stored electrodeposition conditions based on the discrimination signal. In this manner, when the workpiece W starts entering the tank, the sequence control device 13 adjusts the current control devices t7 to 1O so as to generate a paddy amount current suitable for the workpiece.
これにより、急激な電着電流の増加を招くことなく電着
が開始され、穏やかに被膜が形成される。As a result, electrodeposition is started without causing a sudden increase in electrodeposition current, and a film is formed gently.
一方、シーケンス制御装置１２は、各電流調整装置の出
力電圧をワークＷの移動につれて徐々に上昇させる。こ
れにより、被塗装物表面の膜厚増加にともなう電気抵抗
の増大に拘らず、最適な電着電流値が長時間にわたって
維持されて、膜成長速度に低下を来すことなく電着が遂
行されることになる。On the other hand, the sequence control device 12 gradually increases the output voltage of each current adjustment device as the workpiece W moves. As a result, the optimal electrodeposition current value is maintained over a long period of time, and electrodeposition can be carried out without decreasing the film growth rate, despite the increase in electrical resistance due to the increase in film thickness on the surface of the object to be coated. That will happen.
ところで、この電着を流の調整過程において各電極間に
電位差ΔＥ、ΔＥ′、ΔＦ ＩＴが生じることになるが
、各電極に接続されているダイオード２０−２３は、電
極間では逆方向に作用するから、高電位側の！極から低
電位側の電極への電流の流ね込みは阻止されることにな
る。By the way, in the process of adjusting the flow of electrodeposition, potential differences ΔE, ΔE', and ΔFIT will occur between each electrode, but the diodes 20-23 connected to each electrode act in opposite directions between the electrodes. Therefore, on the high potential side! Current flow from the pole to the electrode on the low potential side will be blocked.
所定の厚みの電着膜が形成された時点でワークＷが電着
槽１から引上げられ、続いて種類の異なるワークが電Ｉ
ｌｌに搬送されて来ると、ワーク判別手段１２は、この
ワークの種類を判定して判別信号を出力する。シーケン
ス制御回路１３は、この判別信号を受けてこれに電着塗
装を行なうのに適した電着条件を選択し、以後上述と同
様の過程によりワークの移動に合せて電＠を流をｒＰ４
整する。When an electrodeposited film of a predetermined thickness is formed, the workpiece W is pulled up from the electrodeposition tank 1, and then different types of workpieces are placed in the electrodeposition tank 1.
When the workpiece is transported to 11, the workpiece determining means 12 determines the type of the workpiece and outputs a determination signal. The sequence control circuit 13 receives this discrimination signal, selects electrodeposition conditions suitable for performing electrodeposition coating on the workpiece, and thereafter controls the flow of electricity according to the movement of the workpiece by the same process as described above.
Arrange.
なお、この実施例においては、基準時からの時間に基づ
いて電着電流を制御しているが、搬送経路方向に複数の
検出器を配設し、これからの信号に基づいて制御するよ
うにしても同様の作用を奏することは明らかである。In this example, the electrodeposition current is controlled based on the time from the reference time, but a plurality of detectors are arranged in the direction of the conveyance path, and control is performed based on future signals. It is clear that the same effect can be achieved.
また、上述の実施例においては、説明を簡素化するため
、Ｔ４電極本に対して１台の電流調整装置を接続してい
るが、複数本を１つのグループとし、各グループ毎に電
流ｖ４！！装置を接続しても同様の作用を奏することは
明らかである。Furthermore, in the above embodiment, in order to simplify the explanation, one current adjustment device is connected to each T4 electrode, but a plurality of electrodes are treated as one group, and each group has a current of v4! ! It is clear that the same effect can be achieved even if the devices are connected.
さらに、この実施例においては、ワークの形状、寸法か
ら種類の判定を行なうようにしているが、バーコード等
の識別用ラベルを用いても同様の作用を奏することは明
らかである。Further, in this embodiment, the type of workpiece is determined based on the shape and dimensions of the workpiece, but it is clear that the same effect can be achieved by using an identification label such as a bar code.
（発明の効果）
以上、説明したように本発明においては、ワークの移動
経路に沿って列状に配列された複数の電着電極をワーク
の移動方向に複数の群に分割し、各群のｔ１１極に対し
て電着を流調整！装置を接続するとともに、電着槽のワ
ーク移動経路の電着槽前方にワークの種類を判別するワ
ーク判定手段を配設し、ワークの種類毎に最適な通電条
件を予め設定した制御手段により前記判定手段からの信
号に基づいて前記電着電流調整装置を制御するようにし
たので、ワークの種類に関わりなく自動的に最適な電着
電流を供給することができて、特に多種少量品種のワー
クに対しても品質の高い電＠塗装を行なうことがでざる
。また、電着電極と電着電流調整装置とを被塗装物側が
順方向となるダイオードを介して接続したので、＋！！
極間に生じる電位差に関わりなく電極間電流を阻止でき
て、ｔ１１電極への膜形成を防止し、もって装置のメン
テナンス作業をＩｊＩ素化することができる。(Effects of the Invention) As explained above, in the present invention, a plurality of electrodeposited electrodes arranged in a row along the movement path of the workpiece are divided into a plurality of groups in the movement direction of the workpiece, and each group is Adjust the electrodeposition flow for the t11 pole! In addition to connecting the device, a workpiece determination means for determining the type of workpiece is arranged in front of the electrodeposition tank on the workpiece movement path of the electrodeposition tank, and the control means preset the optimum energization conditions for each type of workpiece. Since the electrodeposition current adjusting device is controlled based on the signal from the determination means, it is possible to automatically supply the optimum electrodeposition current regardless of the type of workpiece. It is not possible to perform high-quality electric @ painting even on surfaces. In addition, since the electrodeposition electrode and the electrodeposition current adjustment device were connected through a diode with the forward direction facing the object to be coated, +! !
Interelectrode current can be blocked regardless of the potential difference generated between the electrodes, and film formation on the t11 electrode can be prevented, thereby simplifying device maintenance work.
第１図は、本発明の一実施例を示す装置の構成図、第２
図は、同ト装置の動作を示す波形図、及び第３．４図は
、それぞれ従来の電着装置の一例を示す構成図と波形図
である。
ｌ・・・電着槽
３〜６・・・電着電極
７〜１０・・・７１着電流調整装置
１１・・・搬送レール
１２・・・ワーク判定装置
１３・・・ジ−ケンスル制御装置
２０〜２３・・・ダイオード
第１図
２θ−＋２３
第２図
入田１存かう。時原FIG. 1 is a configuration diagram of an apparatus showing one embodiment of the present invention, and FIG.
3 is a waveform diagram showing the operation of the same apparatus, and FIG. 3.4 is a configuration diagram and a waveform diagram showing an example of a conventional electrodeposition apparatus, respectively. l...Electrodeposition baths 3-6...Electrodeposition electrodes 7-10...71 Deposition current adjustment device 11...Transportation rail 12...Workpiece determination device 13...Sequence control device 20 ~23...Diode Fig. 1 2θ-+23 Fig. 2 Irita 1 exists. Tokihara
Claims (1)
電極をワークの移動方向に複数の群に分割し、各群の電
着電極ごとに被塗装物側が順方向となるダイオードを介
して電着電流調整装置に接続するとともに、電着槽のワ
ーク移動経路の電着槽前方にワークの種類を判別するワ
ーク判定手段を配設し、ワークの種類毎に最適な通電条
件を予め設定した制御手段により前記判定手段からの信
号に基づいて前記電着電流調整装置を制御するようにし
てなる多段式通電電着塗装装置。A plurality of electrodeposited electrodes arranged in a row along the moving path of the workpiece are divided into groups in the direction of movement of the workpiece, and each group of electrodeposited electrodes is connected through a diode with the side to be coated facing forward. In addition to connecting to the electrodeposition current adjustment device, a workpiece determination means for determining the type of workpiece is installed in front of the electrodeposition tank on the workpiece movement path of the electrodeposition tank, and the optimal energization conditions are set in advance for each type of workpiece. A multi-stage electrification electrodeposition coating apparatus, wherein the control means controls the electrodeposition current adjusting device based on the signal from the determination means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63170262A JPH0663114B2 (en) | 1988-07-08 | 1988-07-08 | Multi-stage electro-deposition coating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63170262A JPH0663114B2 (en) | 1988-07-08 | 1988-07-08 | Multi-stage electro-deposition coating equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0222496A true JPH0222496A (en) | 1990-01-25 |
| JPH0663114B2 JPH0663114B2 (en) | 1994-08-17 |
Family
ID=15901679
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63170262A Expired - Lifetime JPH0663114B2 (en) | 1988-07-08 | 1988-07-08 | Multi-stage electro-deposition coating equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0663114B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101912205B1 (en) * | 2015-04-06 | 2018-10-26 | 김휘호 | electrolysis-electrodeposition bath for water treatment |
-
1988
- 1988-07-08 JP JP63170262A patent/JPH0663114B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0663114B2 (en) | 1994-08-17 |
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