JPH0446822Y2 - - Google Patents
Info
- Publication number
- JPH0446822Y2 JPH0446822Y2 JP4306885U JP4306885U JPH0446822Y2 JP H0446822 Y2 JPH0446822 Y2 JP H0446822Y2 JP 4306885 U JP4306885 U JP 4306885U JP 4306885 U JP4306885 U JP 4306885U JP H0446822 Y2 JPH0446822 Y2 JP H0446822Y2
- Authority
- JP
- Japan
- Prior art keywords
- coating tank
- metal wire
- dry air
- coating
- powder
- 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
- 239000011248 coating agent Substances 0.000 claims description 46
- 238000000576 coating method Methods 0.000 claims description 46
- 239000000843 powder Substances 0.000 claims description 31
- 229920005989 resin Polymers 0.000 claims description 25
- 239000011347 resin Substances 0.000 claims description 25
- 239000002184 metal Substances 0.000 claims description 19
- 238000007664 blowing Methods 0.000 claims description 6
- 238000000151 deposition Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims description 2
- 238000010422 painting Methods 0.000 claims 1
- 239000002245 particle Substances 0.000 description 10
- 238000005086 pumping Methods 0.000 description 8
- 238000007598 dipping method Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
- Electrostatic Spraying Apparatus (AREA)
- Coating Apparatus (AREA)
- Processes Specially Adapted For Manufacturing Cables (AREA)
Description
【考案の詳細な説明】
［産業上の利用分野］
本考案は、静電気流動浸漬法によつて金属線条
上に粉体樹脂を塗装する装置において、塗布槽の
金属線条の入口及び出口にドライエアーによつて
揚圧された揚圧室を設けることにより塗布槽内へ
の湿つた外気の流入を避け、塗布槽内の雰囲気を
乾燥状態に保持するようにした静電粉体塗装装置
に関するものである。[Detailed description of the invention] [Industrial application field] The present invention is an apparatus for coating powder resin on a metal wire by the electrostatic flow dipping method, in which the inlet and outlet of the metal wire in a coating tank are coated with powder resin. Relating to an electrostatic powder coating device that maintains the atmosphere inside the coating tank in a dry state by preventing moist outside air from entering the coating tank by providing a pressure chamber that is pressurized by dry air. It is something.
［従来の技術］
静電気流動浸漬法により粉体樹脂を被塗装物に
塗布する場合は、流動床上に形成される粒子雲
（クラウド）中を接地した被塗装物の金属線条を
走行させて該金属線条上に粉体樹脂を付着させ、
これを加熱して溶融せしめて塗膜を形成するもの
であるが、この際、粉体樹脂を十分に荷電させる
ためには、塗布槽内の雰囲気をできるだけ乾燥状
態に保持することが肝要である。これは、粉体樹
脂が吸湿すると形成された塗膜にボイドが発生
し、性能上特に耐電圧特性が低下するからであ
る。[Prior art] When applying powdered resin to an object to be coated using the electrostatic fluidized dipping method, a metal wire of the object to be coated that is grounded is run through a particle cloud formed on a fluidized bed. Powder resin is attached onto the metal wire,
This is heated and melted to form a coating film. At this time, in order to sufficiently charge the powder resin, it is important to keep the atmosphere inside the coating tank as dry as possible. . This is because when the powder resin absorbs moisture, voids are generated in the formed coating film, which deteriorates the performance, especially the voltage resistance characteristics.
［考案が解決しようとする問題点］
そこで、従来は粉体樹脂によつて流動床上に粒
子雲を形成するために送る空気を、ドライヤーを
通したドライエアーとすることが行なわれてい
た。[Problems to be Solved by the Invention] Therefore, conventionally, the air sent to form a particle cloud on a fluidized bed using powdered resin was used as dry air passed through a dryer.
しかし、この方法をとつた場合でも、塗布槽内
を走行し通過する被塗装物の金属線条の入口及び
出口から湿つた外気の流入が避けられない。これ
は、前記入口及び出口より粒子雲の粉体樹脂を飛
散させないために別に設けられた排気口から槽内
の空気の排気を行なう必要があることにも起因
し、排気に伴つて金属線条の入口及び出口から外
気が吸引されることになるからである。 However, even if this method is adopted, it is unavoidable that moist outside air will flow in from the inlet and outlet of the metal wire of the object to be coated as it travels through the coating tank. This is partly due to the fact that the air in the tank must be exhausted from a separately provided exhaust port in order to prevent the powdered resin from scattering in the particle cloud from the inlet and outlet. This is because outside air will be sucked in from the inlet and outlet of the
［問題点を解決するための手段］
本考案は、上記の従来の静電気流動浸漬法に用
いられていた静電粉体塗装装置の問題点を解決す
るためになされたものであつて、その要旨とする
ところは、静電気を荷電させた粉体樹脂の流動床
が形成された塗布槽内を接地した金属線条を走行
させて該金属線条上に粉体樹脂を付着せしめる装
置において、前記塗布槽の金属線条の入口及び出
口に、送風手段から送られるドライエアーによつ
て前記塗布槽よりも若干高い気圧に保たれる揚圧
室を設けたことを特徴とする静電粉体塗装装置で
ある。[Means for Solving the Problems] The present invention was made to solve the problems of the electrostatic powder coating equipment used in the conventional electrostatic fluid dipping method described above, and its summary. This is an apparatus for depositing powder resin on a grounded metal wire by running a grounded metal wire through a coating tank in which a fluidized bed of powder resin charged with static electricity is formed. An electrostatic powder coating apparatus characterized in that a lifting pressure chamber is provided at the inlet and outlet of the metal wire in the tank, and the pressure chamber is maintained at a pressure slightly higher than that of the coating tank by dry air sent from a blowing means. It is.
［作用］
本考案の塗装装置おいては、塗布槽の金属線条
の入口及び出口にそれぞれドライエアーによつて
揚圧された揚圧室が設けられており、この揚圧室
内の気圧が塗布槽より若干高くなるように送風手
段からドライエアーが送風される。このため、金
属線条の入口及び出口からは揚圧室内のドライエ
アーのみが流入することになり、湿つた外気が塗
布槽内に流入することがない。即ち、塗布槽内の
雰囲気はドライエアーだけになるので粉体樹脂の
荷電が十分に行なわれ、これにより被塗装物の金
属線条への粉体樹脂の付着が安定して行なわれ
る。[Function] In the coating apparatus of the present invention, a pressure chamber is provided at the inlet and outlet of the metal wire of the coating tank, and the pressure in the pressure chamber is raised by dry air. Dry air is blown from the air blowing means so that it is slightly higher than the tank. Therefore, only the dry air in the pumping chamber flows through the inlet and outlet of the metal wire, and humid outside air does not flow into the coating tank. That is, since the atmosphere inside the coating tank is only dry air, the powder resin is sufficiently charged, and thereby the powder resin is stably attached to the metal wire of the object to be coated.
また、揚圧室内の気圧は、塗布槽より若干高い
程度、好ましくは塗布槽内より１〜２mm水柱程度
高い気圧となるように設定されるので、揚圧室か
ら塗布槽へ入るドライエアーによつて粒子雲が乱
されることもない。 In addition, the pressure inside the lift chamber is set to be slightly higher than that of the coating tank, preferably about 1 to 2 mm higher than the pressure inside the coating tank, so the dry air entering the coating tank from the lift chamber is Therefore, the particle cloud is not disturbed.
なお、本考案において揚圧室にドライエアーを
送る送風手段は、一般的な除湿送風装置を用いら
れば良く、粒子雲を形成するために塗布槽下部か
らドライエアーを送り込むための送風装置から送
風管を分岐して揚圧室に接続しても良いし、別
途、揚圧室専用の送風装置を設けても良い。 In addition, in the present invention, a general dehumidifying blower device may be used as the blowing means for sending dry air to the pumping chamber, and air may be blown from a blower device for sending dry air from the bottom of the coating tank to form a particle cloud. The pipe may be branched and connected to the pumping pressure chamber, or a separate blowing device exclusively for the pumping pressure chamber may be provided.
［実施例］
次に、本考案の静電粉体塗装装置を図に示した
実施例に基づいて説明する。第１図は静電気流動
浸漬法に用いる横型塗布槽の一例を示す縦断面図
である。図中の符号１は塗布槽を示し、２は多孔
質板、３は前記多孔質板２上に置かれた粉体樹脂
で、例えばエポキシ樹脂の如く熱可塑性、熱硬化
性を有し、加熱によつて溶融し塗膜を形成し得る
樹脂の粉体である。４は電極で、図示を省略して
ある高電圧発生装置から直流の高電圧電流が印加
されるようにしてある。５は塗布槽１内へドライ
エアーを送るための送風管、６は排気管である。
７は塗布槽１の被し塗装物１１が走行する入口に
設けた揚圧室であり、８はその出口に設けた揚圧
室である。９，１０はそれぞれ揚圧室７，８に設
けた送風管であつて、これらからドライエアーが
送られる。[Example] Next, an electrostatic powder coating apparatus of the present invention will be described based on an example shown in the drawings. FIG. 1 is a longitudinal sectional view showing an example of a horizontal coating tank used in the electrostatic fluid dipping method. Reference numeral 1 in the figure indicates a coating tank, 2 is a porous plate, and 3 is a powder resin placed on the porous plate 2, which has thermoplasticity and thermosetting properties, such as epoxy resin, and is heated It is a resin powder that can be melted to form a coating film. Reference numeral 4 denotes an electrode to which a high voltage DC current is applied from a high voltage generator (not shown). 5 is a blower pipe for sending dry air into the coating tank 1 , and 6 is an exhaust pipe.
7 is a pressure chamber provided at the entrance of the coating tank 1 through which the coating material 11 travels, and 8 is a pressure chamber provided at the outlet thereof. Reference numerals 9 and 10 are blower pipes provided in the pressure chambers 7 and 8, respectively, from which dry air is sent.
次に、上記の構成になる本考案の静電粉体塗装
装置の操作について説明する。静電流動浸漬法に
よつて被塗装物の金属線条１１に粉体樹脂３を塗
布するには、塗布槽１内に接地した金属線条１１
を走行させておき、電極４に直流の高電圧電流を
印加すると同時に、送風管５，９，１０からドラ
イヤーを通したドライエアーを送る。そうする
と、送風管５から送られたドライエアーで多孔質
板２上の粉体樹脂３が流動し、粉体粒子に電荷が
与えられて流動床上に粒子雲（クラウド）が形成
され、ここを走行している接地された金属線条１
１の全表面に粉体樹脂３が付着する。次に図示を
省略してある次工程の加熱装置において粉体樹脂
３の溶融温度以上の温度に加熱されて塗膜が形成
される。この場合、揚圧室７，８にはドライエア
ーが送られているので、ここから外気が吸引され
ることはない。 Next, the operation of the electrostatic powder coating apparatus of the present invention having the above structure will be explained. In order to apply the powder resin 3 to the metal wire 11 of the object to be coated using the electrostatic dynamic dipping method, the metal wire 11 is grounded in the coating tank 1 .
is run, and a high voltage DC current is applied to the electrode 4, and at the same time, dry air is sent from the blower pipes 5, 9, and 10 through a dryer. Then, the powdered resin 3 on the porous plate 2 is fluidized by the dry air sent from the blower pipe 5, and an electric charge is given to the powder particles, forming a particle cloud on the fluidized bed, and the powder particles travel through this cloud. grounded metal wire 1
Powder resin 3 adheres to the entire surface of 1. Next, in a heating device for the next step (not shown), the powder resin 3 is heated to a temperature higher than its melting temperature to form a coating film. In this case, since dry air is sent to the pressurization chambers 7 and 8, outside air is not sucked from there.
次に、上記の装置を用いて行なつた実施例と揚
圧室７，８を設けていない従来の装置を用いた比
較実験例を示す。 Next, a comparative experiment example using the above-mentioned apparatus and a conventional apparatus not provided with the pumping chambers 7 and 8 will be shown.
本考案による装置を用いた実験例
金属線条：２×８mm
粉体樹脂：エポキシ樹脂
塗膜厚さ：60μｍ
流動床へ送るドライエアー：露点−20〜25℃、
0.6Kg／cm2
排気：塗布槽の金属線条入口及び出口から粉体
粒子が飛散しない程度に調整した。 Experimental example using the device according to the present invention Metal wire: 2 x 8 mm Powder resin: Epoxy resin Coating film thickness: 60 μm Dry air sent to the fluidized bed: Dew point -20 to 25 °C,
0.6Kg/cm 2 Exhaust: Adjusted to prevent powder particles from scattering from the metal wire inlet and outlet of the coating tank.
電極の電圧：50Kv
揚圧室へ送るドライエアー：粒度床へ送るドラ
イエアーと同一のエアーであり、揚圧室内の気
圧は塗布槽内気圧＋１〜２mm水柱。 Electrode voltage: 50Kv Dry air sent to the pumping chamber: The same air as the dry air sent to the particle size bed, and the pressure inside the pumping chamber is the pressure inside the coating tank + 1 to 2 mm water column.
本考案の装置による上記条件の実験例では48hr
運転後の塗布槽内粉体樹脂の水分は0.1〜0.2％
（カールフイツシヤー法）であり、得られた塗膜
の耐電圧特性はｎ＝５平均で5.4Kvであつた。 In the experimental example of the above conditions using the device of this invention, it was 48 hours.
The moisture content of the powder resin in the coating tank after operation is 0.1 to 0.2%.
(Karl Fischer method), and the voltage resistance of the resulting coating film was 5.4 Kv on average for n=5.
一方、揚圧室を設けていない従来の装置による
上記条件（揚圧室のみ除外）による比較実験例で
は48時間運転後の塗布槽内粉体樹脂の水分は0.5
〜0.8％（カールフイツシヤー法）であり、得ら
れた塗膜の耐電圧特性はｎ＝５平均で4.5Kvであ
つた。 On the other hand, in a comparative experiment using a conventional device without a lift chamber under the above conditions (excluding the lift chamber only), the moisture content of the powder resin in the coating tank after 48 hours of operation was 0.5.
~0.8% (Karl Fischer method), and the voltage resistance of the resulting coating film was 4.5 Kv on average for n=5.
［考案の効果］
本考案の装置によれば、塗布槽内の雰囲気が揚
圧室とその中に送られるドライエアーによつて外
気から遮断される。従つて、塗布槽内がドライエ
アーのみの乾燥状態に保持され、粉体樹脂の吸湿
が防止される。これにより塗布された塗膜の外観
及び耐電圧特性の向上が図られる。[Effects of the invention] According to the apparatus of the invention, the atmosphere inside the coating tank is isolated from the outside air by the pressure chamber and the dry air sent into the chamber. Therefore, the inside of the coating tank is maintained in a dry state using only dry air, and moisture absorption of the powder resin is prevented. This improves the appearance and withstand voltage characteristics of the applied coating film.
第１図は本考案の静電粉体塗装装置の一実施例
を示す縦断面図である。
図中の符号１は塗布槽、２は多孔質板、３は粉
体樹脂、４は電極、５は送風管、６は排気管、
７，８は揚圧室、９，１０は送風管、１１は被塗
装物である。
FIG. 1 is a longitudinal sectional view showing an embodiment of the electrostatic powder coating apparatus of the present invention. In the figure, 1 is a coating tank, 2 is a porous plate, 3 is a powder resin, 4 is an electrode, 5 is a blower pipe, 6 is an exhaust pipe,
7 and 8 are pumping chambers, 9 and 10 are blower pipes, and 11 is an object to be coated.
Claims (1)
れた塗布槽内を接地した金属線条を走行させて該
金属線上に粉体樹脂を付着せしめる装置におい
て、前記塗布槽の金属線条の入口及び出口に、ド
ライエアーを送る送風手段を備え、該送風手段か
ら送られるドライエアーによつて前記塗布槽より
も若干高い気圧に保たれる揚圧室を設けたことを
特徴とする静電粉体塗装装置。 In an apparatus for depositing powder resin on a grounded metal wire by running a grounded metal wire through a coating tank in which a fluidized bed of powder resin charged with static electricity is formed, an inlet of the metal wire of the coating tank; and an electrostatic powder characterized in that the outlet is provided with a blowing means for sending dry air, and a lifting pressure chamber is maintained at a pressure slightly higher than that of the coating tank by the dry air sent from the blowing means. Body painting equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4306885U JPH0446822Y2 (en) | 1985-03-27 | 1985-03-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4306885U JPH0446822Y2 (en) | 1985-03-27 | 1985-03-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61159063U JPS61159063U (en) | 1986-10-02 |
| JPH0446822Y2 true JPH0446822Y2 (en) | 1992-11-05 |
Family
ID=30554395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4306885U Expired JPH0446822Y2 (en) | 1985-03-27 | 1985-03-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0446822Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013144277A (en) * | 2012-01-16 | 2013-07-25 | Asahi Sunac Corp | Powder painting method |
-
1985
- 1985-03-27 JP JP4306885U patent/JPH0446822Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61159063U (en) | 1986-10-02 |
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