JPS63195297A - Electrodeposition method - Google Patents
Electrodeposition methodInfo
- Publication number
- JPS63195297A JPS63195297A JP2668687A JP2668687A JPS63195297A JP S63195297 A JPS63195297 A JP S63195297A JP 2668687 A JP2668687 A JP 2668687A JP 2668687 A JP2668687 A JP 2668687A JP S63195297 A JPS63195297 A JP S63195297A
- Authority
- JP
- Japan
- Prior art keywords
- coated
- electrodeposition
- outside
- paint
- electrode
- 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
- 238000004070 electrodeposition Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 6
- 238000000576 coating method Methods 0.000 claims abstract description 31
- 239000003973 paint Substances 0.000 claims abstract description 22
- 239000011248 coating agent Substances 0.000 claims abstract description 21
- 238000010422 painting Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 16
- 125000002091 cationic group Chemical group 0.000 abstract description 3
- 239000010960 cold rolled steel Substances 0.000 abstract description 2
- 238000007598 dipping method Methods 0.000 abstract 1
- 230000000873 masking effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、被塗物の一側面を電着塗装するための電着塗
装方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electrodeposition coating method for electrodeposition coating one side of an object to be coated.
（従来の技術）
従来、被塗物の一側面を電着塗装するには、塗装されな
い部分をマスクして行なわれる。例えば、筒体の外部を
電着塗装し、その内部には塗装を施さなｉようにするに
は、実開昭５９−７３３７０号公祇に開示嘔れた電着塗
装における弁付きマスキング材がある。この弁付きマス
キング材は、第３図に示すように、中空内部１を有する
被塗物２の開口端に弁３を取り付けて、電着塗料が外側
から中空内部１に入らないように、また、中空内部１の
圧力が増加したならば、中空内部１の空気は、空気孔４
からゴム管５を押し上げて外側に出るようにして、被塗
物２の外側にだけ電着塗装するような方法をとっている
。(Prior Art) Conventionally, when electrodeposition coating one side of an object to be coated, the portion not to be coated is masked. For example, in order to apply electrodeposition coating to the outside of the cylinder but leave the inside unpainted, a masking material with a valve for electrodeposition coating disclosed in Publication of Utility Model Application No. 59-73370 is used. be. As shown in Fig. 3, this masking material with a valve has a valve 3 attached to the open end of a workpiece 2 having a hollow interior 1 to prevent electrocoating paint from entering the hollow interior 1 from the outside. , if the pressure in the hollow interior 1 increases, the air in the hollow interior 1 will flow through the air holes 4
A method is adopted in which the rubber tube 5 is pushed up from the top to the outside so that only the outside of the object 2 to be coated is electrodeposited.
（発明が解決しようとする問題点）
しかしながら、上記し死中空内部１を有する被塗物２を
電着塗装槽内に完全に浸漬するととは、浮力が作用する
ので難しく、中空内部１を有する被塗物２の一側面だけ
の新たな電着塗装方法が望まれる。(Problems to be Solved by the Invention) However, it is difficult to completely immerse the object 2 to be coated, which has the hollow interior 1 described above, in the electrodeposition coating tank because of the effect of buoyancy. A new method of electrodeposition coating only one side of the object 2 to be coated is desired.
そこで、本発明唸内容積のある被塗物を塗装槽内に浸漬
し、被塗物内に一方の電極を、そして他方の電極を被塗
物外に配置して、被塗物の内側と外側との塗料の電気的
導通状態を保ちながら、被塗物の一側面だけを電着塗装
することによって簡単で、かつ汎用性に富んだ電着塗装
方法を提供することを目的とする。Therefore, according to the present invention, an object to be coated with internal volume is immersed in a coating tank, one electrode is placed inside the object, and the other electrode is placed outside the object. To provide a simple and versatile electrodeposition coating method by electrodeposition coating only one side of an object to be coated while maintaining electrical continuity of the paint with the outside.
（問題点を解決するための手段）
上記目的を達成するための本発明の特徴は、塗装槽内に
内容積のある被塗物を浸漬し、一方の電極を該被塗物の
内側に、他方の電極を該被塗物の外側に配し、該被塗物
の内側と外側との塗料の電気的導通状態を維持して該被
塗物の一側面を電着塗装することである。(Means for Solving the Problems) A feature of the present invention for achieving the above object is that a workpiece having an internal volume is immersed in a coating tank, and one electrode is placed inside the workpiece. The other electrode is disposed on the outside of the object to be coated, and one side of the object is electrodeposited while maintaining electrical continuity between the inside and outside of the object.
（作 用）
上記の電着方法によって、被塗物の一側面だけが電着塗
装されるので、塗装工程が簡単になす、シかも容器状の
ものや、タンク状のものの一側面が電着塗装される。(Function) With the above electrodeposition method, only one side of the object to be coated is electrodeposited, so the coating process is simplified. be painted.
（実施例） 以下に、本発明の一実施例を図面に基づいて説明する。(Example) An embodiment of the present invention will be described below based on the drawings.
まず、第１図は、本発明の電着塗装方法を実行するため
の装置である。そして、内容積のある被塗物２としては
、第２図に示すように横２９ｍｍ、縦１５０ｍｍ、厚味
α８ｍｍの冷延鋼板を３枚用意して、２５１１間隔に置
き、その開放している底面と側面とを電気絶縁材料から
なる板材またはテープ６によって箱状に遮蔽したものを
使用する。塗装槽７内にはカチオン電着塗料８（商品名
、ＰＴｕ−８０）が投入され、その中に上記した被塗物
２が浸漬される。被塗物２は、第１図に示すように、そ
の板材またはテープ６の上部は、電着塗料８の液面より
も上方に出ている。したがって、被塗物２の内側と外側
の電着塗料８は、被塗物２を介して導電性を持つことに
なる。そして、第１図に示すように、被塗物２のうちの
左板９と右板１０とに挾まれている中央板１１は陰極と
して、直流電源１２のマイナス側に接続され、一方、陽
極１３は、被塗物２の左板９から１５ａｎ隔てた電着塗
料Ｂ内に配置されて直流電源１２のプラス側に接続され
ている。このように電着塗装を行なうが、その時の電着
条件は、直流電圧が２５０Ｖ、通電時間が３分、塗料の
液温が２８℃とすれば、電流は、被塗物２の左板９と右
板１０とを通じて中央板１１に向けて流れる。この時、
左板９と右板ｌＯの外側面１４では、Ｈ”＋ Ｈ＠ ０
＋ ２ ｅ −→Ｈ献↑）＋ＯＨ−となシ徐々に■が
上昇して、電着塗料８の塗膜が析出される。一方、左板
９と右板１０の内側面１５では、ＯＨ″″→に０３（↑
）十Ｈ”−４−２ｅ−となってＰＨが酸性であるために
塗膜は析出されない。First, FIG. 1 shows an apparatus for carrying out the electrodeposition coating method of the present invention. As the object to be coated 2 with internal volume, as shown in Fig. 2, three cold-rolled steel plates with a width of 29 mm, a length of 150 mm, and a thickness of α8 mm were prepared, placed at 2511 intervals, and opened. A box-shaped box is used whose bottom and side surfaces are covered with a plate or tape 6 made of an electrically insulating material. A cationic electrodeposition paint 8 (trade name: PTu-80) is charged into the coating tank 7, and the object 2 to be coated described above is immersed therein. As shown in FIG. 1, the object 2 to be coated has a plate material or a tape 6 whose upper portion protrudes above the liquid level of the electrodeposition paint 8. Therefore, the electrodeposition paint 8 on the inside and outside of the object 2 to be coated has conductivity through the object 2 to be coated. As shown in FIG. 1, the center plate 11 sandwiched between the left plate 9 and the right plate 10 of the object 2 to be coated is connected to the negative side of the DC power source 12 as a cathode, while the anode 13 is arranged in the electrodeposition paint B 15 an away from the left plate 9 of the object 2 to be coated, and is connected to the positive side of the DC power supply 12. Electrodeposition is carried out in this way, and the conditions for electrodeposition are that the DC voltage is 250V, the current application time is 3 minutes, and the paint temperature is 28°C. It flows toward the center plate 11 through the right plate 10 and the right plate 10. At this time,
At the outer surface 14 of the left plate 9 and the right plate lO, H”+ H@0
+ 2 e −→H ↑) + OH− gradually increases, and a coating film of the electrodeposition paint 8 is deposited. On the other hand, on the inner surface 15 of the left plate 9 and right plate 10, 03 (↑
) 10H"-4-2e-, and since the pH is acidic, no coating film is deposited.
このよりに電着塗装後、左板９と右板１０とを水洗し、
焼付乾燥を施すことによって左板９と右板１０の外側面
１４には電着塗装され、それぞれの内側面１５には、電
着塗装されない。After this electrodeposition coating, the left plate 9 and the right plate 10 are washed with water,
By baking and drying, the outer surfaces 14 of the left and right panels 9 and 10 are electrocoated, but the inner surfaces 15 of each are not electrocoated.
なお、上記実施例では、被塗物２を介して被塗物２の内
側と外側との電着塗料８を電気的に導通させたが、被塗
物２すなわち、板材またはテープ６、左板９、右板１０
のいずれかに小孔２ａを設けて、被塗物２の外側と内側
との電着塗料８が出入シするようにしてもよｉｏこの時
の小孔２ａは、できるだけ小さい方がよい。In the above embodiment, the electrodeposition paint 8 was electrically connected to the inside and outside of the object 2 via the object 2, but the object 2, that is, the plate material or tape 6, the left plate 9. Right plate 10
A small hole 2a may be provided in either of the holes 2a to allow the electrodeposition paint 8 to enter and exit the outside and inside of the object 2. In this case, it is preferable that the small hole 2a be as small as possible.
また、被塗物２としては、開口部分が比較的大きなバケ
ツや、開口部分が小さいガソリンタ／りのようなもので
も電極をその内側に配置して、上記と同じように、被塗
物の外側面を電着塗装することができる。この時、被塗
物２の内側に陽極、外側に陰極の電極を配置すれば、被
塗物２の内側を電着塗装し、外側を電着塗装しないよう
にすることもできる。In addition, even if the object 2 to be coated is a bucket with a relatively large opening or a gas tank with a small opening, the electrodes can be placed inside the object and the outside of the object can be coated in the same way as above. The sides can be electrodeposited. At this time, by arranging an anode electrode on the inside of the object 2 and a cathode electrode on the outside, it is possible to perform electrodeposition coating on the inside of the object 2 and not to coat the outside.
さらに、上記した実施例ではカチオン電着塗料を使用す
る場合について述べたが、アニオン電着塗料を使用する
場合についても本発明の電着塗装方法に適用できるもの
である。Furthermore, although the above embodiments have been described using cationic electrodeposition paints, the electrodeposition coating method of the present invention can also be applied to cases where anionic electrodeposition paints are used.
（発明の効果）
以上述べたことから、本発明の電着塗装方法では、塗装
槽内に浸漬された内容積を有する被塗物の内側に一方の
電極を配し、被塗物の外側に他方の電極を配し、しかも
被塗物の内側と外側との塗料の電気的導通状態を維持さ
せることによって、被塗物の一側面にだけ電着塗装を施
すことができるので、従来のように複雑な弁を設ける必
要がなく、また、被塗物を浸漬することは容易であるか
ら、電着塗装作業が簡単となり、容器状およびタンク状
の被塗物でも一側面の電着塗装ができるので汎用性のあ
る電着塗装方法が実現できる。(Effects of the Invention) From the above, in the electrodeposition coating method of the present invention, one electrode is arranged inside the object to be coated which has an internal volume immersed in the coating tank, and the electrode is placed on the outside of the object to be coated. By arranging the other electrode and maintaining electrical continuity between the inside and outside of the object, electrodeposition coating can be applied to only one side of the object, unlike conventional methods. There is no need to install a complicated valve in the tank, and it is easy to immerse the object to be coated, so the electrodeposition coating work is simple. This makes it possible to realize a versatile electrodeposition coating method.
第１図は、本発明の電着塗装方法を実施するための装置
を示す概略図、
第２図は、被塗物の一例を示す斜視図、第３図は、従来
の一側面の電着塗装に使用されるマスキング材を示す縦
断面図である。
２・・・被塗物 ２ａ・・・小孔
７・・・塗装槽 ８・・・塗料（電着塗料）１１．
１３ ・・・電極（中央板、陽極）１４・・・・・・・
・・−側面（外側面）ｉＩ図FIG. 1 is a schematic diagram showing an apparatus for implementing the electrodeposition coating method of the present invention, FIG. 2 is a perspective view showing an example of an object to be coated, and FIG. 3 is a conventional electrodeposition coating method on one side. It is a longitudinal cross-sectional view showing a masking material used for painting. 2...Object to be coated 2a...Small hole 7...Coating tank 8...Paint (electrodeposition paint) 11.
13... Electrode (center plate, anode) 14...
...-Side (outer surface) II diagram
Claims (3)
電極を該被塗物の内側に、他方の電極を該被塗物の外側
に配し、該被塗物の内側と外側との塗料の電気的導通状
態を維持して該被塗物の一側面を電着塗装することを特
徴とする電着塗装方法。(1) Immerse a workpiece with an internal volume in a coating tank, place one electrode on the inside of the workpiece and the other electrode on the outside of the workpiece, and place one electrode on the inside of the workpiece. 1. An electrodeposition coating method, characterized in that one side of the object to be coated is electrodeposited while maintaining electrical continuity between the paint and the outside.
内側と外側との塗料の電気的導通状態を維持することを
特徴とする特許請求の範囲第１項に記載の電着塗装方法
。(2) Electrodeposition according to claim 1, characterized in that electrical continuity of the paint between the inside and outside of the object to be coated is maintained through the conductivity of the object to be coated. Painting method.
外側との塗料の電気的導通状態を維持することを特徴と
する特許請求の範囲第１項に記載の電着塗装方法。(3) A small hole is formed in the object to be coated to maintain electrical continuity of the paint between the inside and outside of the object to be coated. How to apply the paint.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2668687A JPS63195297A (en) | 1987-02-06 | 1987-02-06 | Electrodeposition method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2668687A JPS63195297A (en) | 1987-02-06 | 1987-02-06 | Electrodeposition method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63195297A true JPS63195297A (en) | 1988-08-12 |
Family
ID=12200276
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2668687A Pending JPS63195297A (en) | 1987-02-06 | 1987-02-06 | Electrodeposition method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63195297A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02122096A (en) * | 1988-10-28 | 1990-05-09 | Nippon Paint Co Ltd | Electrodepositing and coating method for single side |
| JP2007223600A (en) * | 2007-05-21 | 2007-09-06 | Nsk Ltd | Hub unit bearing |
| JP2010023839A (en) * | 2009-11-05 | 2010-02-04 | Nsk Ltd | Hub unit bearing and electrodeposition coating method of the same |
-
1987
- 1987-02-06 JP JP2668687A patent/JPS63195297A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02122096A (en) * | 1988-10-28 | 1990-05-09 | Nippon Paint Co Ltd | Electrodepositing and coating method for single side |
| JP2007223600A (en) * | 2007-05-21 | 2007-09-06 | Nsk Ltd | Hub unit bearing |
| JP2010023839A (en) * | 2009-11-05 | 2010-02-04 | Nsk Ltd | Hub unit bearing and electrodeposition coating method of the same |
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