JPS60102977A - Electrostatic coating method - Google Patents

Electrostatic coating method

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Publication number
JPS60102977A
JPS60102977A JP21058683A JP21058683A JPS60102977A JP S60102977 A JPS60102977 A JP S60102977A JP 21058683 A JP21058683 A JP 21058683A JP 21058683 A JP21058683 A JP 21058683A JP S60102977 A JPS60102977 A JP S60102977A
Authority
JP
Japan
Prior art keywords
powder
electric field
curtain
phase
roller base
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
JP21058683A
Other languages
Japanese (ja)
Other versions
JPH0114822B2 (en
Inventor
Hisafumi Miyouchin
明珍 寿史
Toshiaki Urano
鋭明 浦野
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.)
Minolta Co Ltd
Original Assignee
Minolta 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 Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP21058683A priority Critical patent/JPS60102977A/en
Publication of JPS60102977A publication Critical patent/JPS60102977A/en
Publication of JPH0114822B2 publication Critical patent/JPH0114822B2/ja
Granted legal-status Critical Current

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Abstract

PURPOSE:To uniformly apply an electrically charged powder to a work with a desired film thickness without wasting the powder, by a method wherein an electrically charged powder is circulatedly fed by a phased electric field to a position proximate to a work impressed with a bias voltage. CONSTITUTION:The work 11 is surrounded by a phased electric field curtain 13, and end part of the space surrounded by the curtain 13 is opened, and a powder 12 electrically charged to positive polarity is thrown in through an introducing passage 14 formed in the upward direction. When a high voltage is impressed between the curtain 13 and the work 11 by a bias power source 18, an electric field surrounding the work 11 is generated. The powder 12 is freed from the curtain surface with the progress of the phase of a three-phase power source 15, an is electrostatically attracted onto the surface of the work 11 under the function of the electric field. In this case, the powder is circulated with the variation of the phase of the power source 15, so that it is not scattered away. Accordingly, the powder can be applied in a uniform film thickness or a desired thickness without wasting it.

Description

【発明の詳細な説明】 技術分野 この発明は静電塗布方法に関する。[Detailed description of the invention] Technical field This invention relates to an electrostatic coating method.

例えばアルミニュウム製のローラ基体にテア資ン粉を塗
布してテフロンローラを製造する場合、テフロン粉を所
定の極性に帯電させる一方、ローラ基体のまわシに電界
をつくり、この電界に帯電テフロン粉を乗せてローラ基
体の表面にテフロン粉を吸着させる静電塗布方法か一般
的に採用されている。
For example, when manufacturing a Teflon roller by coating an aluminum roller base with tare powder, the Teflon powder is charged to a predetermined polarity, an electric field is created around the roller base, and the charged Teflon powder is applied to this electric field. An electrostatic coating method is generally used in which Teflon powder is adsorbed onto the surface of the roller base.

従来技術 この種の静電塗布方法の従来例として、第1図や第2図
に示す構成のものが知られている。
Prior Art As a conventional example of this type of electrostatic coating method, a structure shown in FIGS. 1 and 2 is known.

第1図に示す方法は1ホンツマ−1より投入されルテフ
ロン粉を、コンプレッサー2から供給される圧搾空気に
よシ帯電器3の投首部を経てローラ基体4に向は噴出さ
せる一方、ノくイアス鼠源5を用い噴射/ズル6とロー
ラ基体4の間に高電圧を加えてローラ基体4のまわりに
電界をつくり、前記の帯電器3によシ帯電したテフロン
粉をこの電界に乗せて回転するローラ基体4の表面に静
電付着させるようにしたものである。
In the method shown in FIG. 1, luteflon powder is introduced from a pump 1 and is ejected by compressed air supplied from a compressor 2 onto a roller base 4 through a neck portion of a charger 3. A high voltage is applied between the injection/zipper 6 and the roller base 4 using the mouse source 5 to create an electric field around the roller base 4, and the Teflon powder charged by the charger 3 is placed on this electric field and rotated. It is designed to electrostatically adhere to the surface of the roller base 4.

ところが、このようなスプレー方式の場合、テフロン粉
の分散をよくして塗布が均一に行われるようにしようと
すると、噴射ノズル6とローラ基体4の間の距離を十分
とる必要があり、このため散布空間が広くなってテフロ
ン粉の散逸量がそれだけ増大し無駄が多くなる。また、
噴射ノズル6とローラ基体4の間隔が大きいので、所定
の電界強度を得るのにバイアス電源5としてかなり高電
圧(60KV以上)のものが必要になる。テア0ン粉の
散逸を抑えるには、電界強度を上げればよいが、そうす
るとさらに高電圧のバイアス電源5が必要になるだけで
なく、散布空間のイオン電流密度が増大して電場ポテン
シャルが強調されるととになり、これによって塗布むら
の増大を招く不都合がある。
However, in the case of such a spray method, in order to improve the dispersion of Teflon powder and ensure uniform application, it is necessary to provide a sufficient distance between the spray nozzle 6 and the roller base 4. As the spraying space becomes wider, the amount of Teflon powder dissipated increases accordingly, resulting in more waste. Also,
Since the distance between the injection nozzle 6 and the roller base 4 is large, a fairly high voltage (60 KV or more) bias power source 5 is required to obtain a predetermined electric field strength. In order to suppress the dissipation of the tear powder, it is possible to increase the electric field strength, but this not only requires a higher voltage bias power supply 5, but also increases the ion current density in the dispersion space and emphasizes the electric field potential. This has the disadvantage of increasing coating unevenness.

一方、第2図に示す方法は、槽7内に満たした分散液(
7レオン、表面活性剤、溶剤の混合液)8にテフロン粉
を加えて分散させ、この分散液8中に浸したローラ基体
4と槽7との間にバイアス電源5を用いてバイアスをか
け・分散液8中のテフロン粉をローラ基体4の表面に電
着させるようにしたものである。
On the other hand, the method shown in FIG. 2 uses a dispersion liquid (
7) Teflon powder is added and dispersed in 8 (a mixed solution of Leon, a surfactant, and a solvent), and a bias power source 5 is used to apply a bias between the roller base 4 immersed in this dispersion 8 and the tank 7. The Teflon powder in the dispersion liquid 8 is electrodeposited on the surface of the roller base 4.

この方法では、テフロンのコート膜厚を均一にするため
に、ローラ基体4をゆっくり回転させ、しかも分散液8
中から徐々に引き上げる必要があり、製造時間が多くか
かるばかυでなく、引上げのさい重力の影響を受けて、
ローラ基体4の一方の端部側と他端部側とで塗布膜厚に
差が生じ、均一な膜厚に塗布できないという欠点を有す
る。
In this method, in order to make the Teflon coating film uniform in thickness, the roller base 4 is rotated slowly, and the dispersion liquid 8 is rotated slowly.
It is necessary to gradually pull up from the inside, which takes a lot of manufacturing time.
There is a difference in the thickness of the coating film between one end and the other end of the roller base 4, which has the disadvantage that it is not possible to apply the film to a uniform thickness.

目 的 この発明は、従来例における如上の欠点を解消し、塗布
粉体を無駄に浪費することがなく、膜厚を均一にしかも
所望の厚みにコントロールして塗布でき、処理速度も速
く処理のための所要空間も狭く抑えることのできる静[
塗布方法を提供することを目的とする。
Purpose This invention solves the above-mentioned drawbacks of the conventional method, eliminates the needless waste of coating powder, allows coating to be uniform and controlled to a desired thickness, and increases processing speed and processing speed. A quiet [
The purpose is to provide a coating method.

発明の概要 この発明の静電塗布方法は、バイアス印加した塗布目的
物の近傍に、荷電粉体を位相電場で循環搬送することK
より、該塗布目的物に・荷電粉体を均一に付着せしめる
ものである〇 実施例 この発明の第1の実施例を、第3図ないし第5図に基づ
いて説明すれば、この実施例の静電塗布方法は、アルミ
ニュウム製のローラ基体11を塗布目的物とし−これに
テフロン粉12を塗布してテフロンローラを製造する場
合に適用したものであって、p−ラ基体11は横向きに
配置される。
Summary of the Invention The electrostatic coating method of the present invention includes circulating and transporting charged powder near an object to be coated by applying a bias using a phase electric field.
Embodiment 1 The first embodiment of the present invention will be explained based on FIGS. 3 to 5. The electrostatic coating method is applied to manufacture a Teflon roller by coating an aluminum roller base 11 with Teflon powder 12, and the p-Ra base 11 is placed horizontally. be done.

このローラ基体11は位相電界カーテン13で囲まれ、
このカーテン13による囲設空間の一端部を開放してL
向きに形成される導入路14よシ、正極性に帯電したテ
フロン粉12が投入される。
This roller base 11 is surrounded by a phase electric field curtain 13,
By opening one end of the space enclosed by this curtain 13,
Positively charged Teflon powder 12 is introduced into the introduction path 14 formed in the same direction.

位相電界カーテン13は、一種の不平等交番電界に桝す
るものであり、多相交流電源を用いて、荷電粒子をカー
テン面に沿って非接触状態で位相の進行方向に移動させ
るものである0ことでは多相交流電源として三相電源1
5を用いた例を示しておシ、位相電界カーテン13のシ
ートは、第4図に示すように三相電源15のそれぞれの
位相U。
The phase electric field curtain 13 is a type of unequal alternating electric field, and uses a multiphase AC power source to move charged particles in the phase advancing direction along the curtain surface in a non-contact manner. In this case, three-phase power supply 1 is used as a multi-phase AC power supply.
4, the sheets of the phase electric field curtain 13 are arranged at the respective phases U of the three-phase power supply 15, as shown in FIG.

v、wに対応する電極16・・・を位相の進行の順序に
合せて並設し、これら電極16・・・を絶縁シート17
で被着して構成してあり、三相電源15のそれぞれの出
力端子は対応する電極16・・・に結線されている〇 一方、位相電界カーテン13とローラ基体11との間は
、バイアス電源18により高電圧が印加されており、こ
れKよりローラ基体11を取如巻く空間にはローラ基体
11に向けて電気力線の及ぶ電界がつくられる。位相電
界カーテン13では、バイアス電源18の電圧と三相電
源15の電圧が重畳して印加される。
Electrodes 16 corresponding to v and w are arranged in parallel according to the order of phase progression, and these electrodes 16 are connected to an insulating sheet 17.
Each output terminal of the three-phase power supply 15 is connected to the corresponding electrode 16... On the other hand, a bias voltage is connected between the phase electric field curtain 13 and the roller base 11. A high voltage is applied by a power source 18, and an electric field is created in the space surrounding the roller base 11 by electric lines of force directed toward the roller base 11. The voltage of the bias power supply 18 and the voltage of the three-phase power supply 15 are applied to the phase electric field curtain 13 in a superimposed manner.

テフロン粉12の帯電は、前記導入路14の入口近傍に
配置した所定の帯電手″段(コロナ放電゛管などン19
によシ行われる。
The Teflon powder 12 is charged by a predetermined charging means (such as a corona discharge tube 19) disposed near the entrance of the introduction path 14.
It will be done in good time.

導入路14を経て、位相電界カーテン13による囲設空
間の一端開放部に投下された帯電テフロン粉12(正極
性)は、三相電源15の位相の進行に伴い、その進行方
向に向けてカーテン面から遊離した状態で移送されると
ともに1位相電界カーテン13とローラ基体11の間に
つくられた電界の作用によって、テフロン粉13の一部
はローラ基体110表面に吸引され静電付着する。位相
電界カーテン13は、下部面域がほぼ水平に形成され、
上部面域は半円形をなしてローラ基体11を取シ囲んで
おシ、三相電源15の位相変化に伴い移動するテフロン
粉12は、カーテン面に沿ってローラ基体11の周囲を
1可回し、導入端部の上方までくると自重により元の導
入端部に落下して戻るので、絶えずローラ基体11の周
囲を循環することになり、位相電界カーテン13によっ
て囲まれる空域からテフロン粉12が散逸することはな
い。このような循環移動を繰り返しながらテフロン粉1
2は徐々にローラ基体110表面に付着し、均一にテフ
四ン塗装が施される。
The charged Teflon powder 12 (positive polarity) dropped into the open end of the space enclosed by the phase electric field curtain 13 through the introduction path 14 is directed toward the direction of the curtain as the phase of the three-phase power supply 15 progresses. A portion of the Teflon powder 13 is transferred while being released from the surface and is attracted to the surface of the roller base 110 by the action of the electric field created between the one-phase electric field curtain 13 and the roller base 11 and electrostatically adheres thereto. The phase electric field curtain 13 has a lower surface area formed almost horizontally,
The upper surface area is semicircular and surrounds the roller base 11, and the Teflon powder 12, which moves with the phase change of the three-phase power supply 15, rotates once around the roller base 11 along the curtain surface. When it reaches above the introduction end, it falls back to the original introduction end due to its own weight, so it constantly circulates around the roller base 11, and the Teflon powder 12 is scattered from the air space surrounded by the phase electric field curtain 13. There's nothing to do. While repeating this circular movement, Teflon powder 1
2 gradually adheres to the surface of the roller base 110 and is evenly coated with Teflon.

テフロン粉12が位相電界カーテン13の表面から遊離
した状態で搬送される動作を第4図に基づいて説明すれ
ば、同図においてAは隣接する電極16.16間の電気
力線で、帯電されたテフロン粉12(正極性)には、こ
の電気力線の接線方向に働くグレーデイエントカE1電
気力I!Aの曲率によって生じる遠心力F′などのベク
トル和として、カーテン面から離反しようとする力Fが
働く。
The operation of conveying the Teflon powder 12 in a state in which it is released from the surface of the phase electric field curtain 13 will be explained based on FIG. The Teflon powder 12 (positive polarity) has a gray force E1 electric force I! acting in the tangential direction of the lines of electric force. A force F that tries to move away from the curtain surface acts as a vector sum of centrifugal force F' caused by the curvature of A.

この方Pの向きは位相進行方向に偏るので、結果として
テフロン粉12は浮遊しながら位相進行方向に搬送され
る。
Since this direction P is biased toward the phase advancing direction, as a result, the Teflon powder 12 is transported in the phase advancing direction while floating.

との静i!塗布方法の場合、上記のようにテフロン粉1
2が位相電界カー゛テン13の作用で、散逸することな
く多量に分散してローラ基体11の囲りを循環するから
、バイアス電源1Bによって得られる電界も、テフロン
粉12に対してローラ基体11への方向性を付与する程
度の強度で十分で、そのためローラ基体11の周囲のイ
オン電流密度も小さく、ローラ基体11へ付着したテフ
ロン粉12の帯電電荷によってもたらされる電場阻止ポ
テンシャルが相対的に強くなって、塗布厚は一層均一に
なり、また膜厚のコントロールもバイアスの調整によシ
容易に行えることになる。
Shizui with! For the application method, use 1 teflon powder as described above.
2 circulates around the roller base 11 in a large amount without being dissipated due to the effect of the phase electric field curtain 13. Therefore, the electric field obtained by the bias power supply 1B also affects the roller base 11 with respect to the Teflon powder 12. It is sufficient that the ion current density around the roller base 11 is small, and the electric field blocking potential brought about by the electrical charge of the Teflon powder 12 attached to the roller base 11 is relatively strong. As a result, the coating thickness becomes more uniform, and the film thickness can be easily controlled by adjusting the bias.

テフロン粉12の導入路14への投入は、例えば第3図
に示すように、ふるい20に掛けながらできるだけ自重
落下するように行うなどして、テフロン粉12が十分分
散した状態で位相電界カーテン13の設置部へ送シ込ま
れるようにするのが好ましい。
The Teflon powder 12 is introduced into the introduction path 14 by, for example, passing it through a sieve 20 and allowing it to fall under its own weight as much as possible, as shown in FIG. It is preferable that it be fed into the installation section of the machine.

テフロン粉12の塗布はローラ基体11を回転させなが
ら行い、それによって均一塗布の効果が一層りるように
しているが、テフロン粉12はローラ基体11を取シ巻
くように循環するから、必ずしも上記のように回転させ
る必要はない。
The application of Teflon powder 12 is performed while rotating the roller base 11, thereby increasing the effect of uniform application. However, since the Teflon powder 12 circulates around the roller base 11, it is not necessary to apply the Teflon powder 12 as described above. There is no need to rotate it like this.

高電圧が印加される位相電界カーテン13およびこれに
連続する導入路14の外面側は接地して、この部分に手
などが触れても感電事故が生じないようにされている0 この実施例では1位相電界カーテン13その他の諸条件
を表1のように設定して良好な結果を得たが、これらの
値は適用条件によって異ることは勿論である。
The outer surface of the phase electric field curtain 13 to which a high voltage is applied and the introduction path 14 continuous thereto are grounded to prevent electric shock from occurring even if a hand or the like touches these parts. In this embodiment, Good results were obtained by setting the one-phase electric field curtain 13 and other conditions as shown in Table 1, but these values will of course vary depending on the application conditions.

表 1 なおローラ径rがtom≦r≦som程度の範囲では、
装置円形部の内径RはR>3rの関係となるように設定
するのが好適である。
Table 1 In addition, when the roller diameter r is in the range tom≦r≦som,
It is preferable that the inner diameter R of the circular portion of the device is set so that R>3r.

上記結果からも明らかなように、この静電塗装方法の場
合、バイアス電源18は3〜6KVの電圧であればよく
、60KV以上を要する従来例の場合に比べて、はるか
に低いバイアス電圧で実施することができる。
As is clear from the above results, in the case of this electrostatic coating method, the bias power supply 18 only needs to have a voltage of 3 to 6 KV, which is much lower than the conventional case, which requires 60 KV or more. can do.

位相電界カーテン13のシート構造については−このほ
か第5図に示すように電極16・・・の一部をテフロン
粉12が移動する絶縁シート170表面側に露出させて
、この露出電極16の沿面放電によりテフロン粉12を
帯電させ別に設ける帯電手段19を省略したシ、帯電処
理をこの部分で補うようにしてもよい。なおテフロン粉
12の帯電処理は、摩擦による自然帯電によシ行うよう
にしてもよい。
As for the sheet structure of the phase electric field curtain 13, as shown in FIG. The Teflon powder 12 may be charged by electric discharge, and the charging means 19 provided separately may be omitted, or the charging process may be supplemented by this part. The Teflon powder 12 may be charged by natural charging due to friction.

この発明の第2の実施例を第6図に示す。との実施例は
、第1の実施例とは逆にローラ基体11側より位相電界
カーテン13側へバイアスを加えたものである。したが
って、この場合は、テフロン粉12が電界に引かれてロ
ーラ基体11に電着するように、テフロン粉12は負極
性に帯電させる必要がある。
A second embodiment of the invention is shown in FIG. In this embodiment, a bias is applied from the roller base 11 side to the phase electric field curtain 13 side, contrary to the first embodiment. Therefore, in this case, the Teflon powder 12 needs to be negatively charged so that it is attracted by the electric field and electrodeposited on the roller base 11.

ここでは、位相電界カーテン13側に高電圧が印加され
ない代りに、ローラ基体11やその支持部に高電圧がか
かるから、ローラ基体11の取付けや取外しのさいr 
tlf Lないように1これらの部分のシールドを十分
はかる配慮が必要である。そのitかの構成については
第1の実施例と同様である。
Here, a high voltage is not applied to the phase electric field curtain 13 side, but a high voltage is applied to the roller base 11 and its supporting portion, so that when the roller base 11 is attached or removed, r
1 Care must be taken to sufficiently shield these parts to prevent tlf L. The configuration thereof is the same as that of the first embodiment.

この発明の第3の実施例を第7FmK示す。この実施例
では、位相電界カーテン13の概形を断面り字状として
、カーテン13の垂直面部131Lとは反対側の導入路
14よシ帯電テフ四ン粉12を投入し、カーテン13の
搬送作用によシその水平面部13bから垂直面部13N
K沿うテフロン粉12のL昇移動と、自重による自然落
下の反復作用により、カーテン13の垂直面部13a近
傍においてテフロン粉12を循環させるよう忙している
。ローラ基体11は、テフロン粉12が上下に循環する
垂直面部13aの近傍Ktfi向きに配置され、回転さ
せられる。位相電界カーテン13の一部は、導入路14
の一部面域まで延設されて一導入路14へ投入されたテ
フロン粉12がカーテン13の水平面域13bに円滑に
導入されるようにされている。18はバイアス電源で・
ローラ基体11側に接続されている。15は位相電界カ
ーテン13を駆動する三相電源である。
A third embodiment of the present invention is shown in 7th FmK. In this embodiment, the phase electric field curtain 13 has an approximate cross-sectional shape, and the charged Teflon powder 12 is introduced into the introduction path 14 on the opposite side of the vertical surface portion 131L of the curtain 13, and the conveyance effect of the curtain 13 is From the horizontal surface portion 13b to the vertical surface portion 13N
The Teflon powder 12 is circulated in the vicinity of the vertical surface portion 13a of the curtain 13 by the repeated movement of the Teflon powder 12 along K along L and falling naturally due to its own weight. The roller base 11 is arranged in the direction Ktfi near the vertical surface portion 13a where the Teflon powder 12 circulates up and down, and is rotated. A part of the phase electric field curtain 13 is connected to the introduction path 14
The Teflon powder 12 extended to a part of the surface area and introduced into the one introduction path 14 is smoothly introduced into the horizontal surface area 13b of the curtain 13. 18 is the bias power supply.
It is connected to the roller base 11 side. 15 is a three-phase power source that drives the phase electric field curtain 13.

この実施例の場合、装置のL方が開放されるから構成が
簡単であるとともに、ローラ基体IIの取付けや取外し
が容易で作業性が大幅に向上する。
In this embodiment, since the L side of the device is open, the structure is simple, and the roller base II can be easily attached and detached, which greatly improves work efficiency.

またテフロン粉12は上下に循環するから、L方が開放
されていても散逸することがなく、無駄に浪費されるこ
とはない。
Furthermore, since the Teflon powder 12 circulates up and down, it will not be dissipated even if the L side is open, and will not be wasted.

なお、テフロン粉12の循環は位相電界カーテン13の
垂直面部13a側に偏って行われるから、均一塗布をは
かるうえでローラ基体11の回転は必須となる。
Note that since the Teflon powder 12 is circulated toward the vertical surface portion 13a of the phase electric field curtain 13, rotation of the roller base 11 is essential for uniform application.

この発明の第4の実施例を第8図および第9図に示す。A fourth embodiment of the invention is shown in FIGS. 8 and 9.

この実施例では、2枚の位相電界カーテン13.13を
概形断面がυ字状となるように配置して、一方の垂直面
部13aの上端付近に設けられた導入路14より帯電さ
れたテフロン粉12(正極性)を投入し、このテフロン
粉12を対向する2つの垂直面部13a、13aに沿っ
てと下方向に循環させるようにしている。ローラ基体1
1は2つの垂直面部13a、13aに挾まれる中間部に
垂直に配置して回転させ、その全周面にテフロン粉12
が均一塗布されるようにしている。バイアス電源18は
、第1の実施例の場合と同様に、三相電源15と型骨さ
せて位相電界カーテン13側へ印加される。
In this embodiment, two phase electric field curtains 13, 13 are arranged so that their cross sections are υ-shaped, and charged Teflon is applied through an introduction path 14 provided near the upper end of one vertical surface portion 13a. Powder 12 (positive polarity) is introduced, and this Teflon powder 12 is circulated downward along two opposing vertical surfaces 13a, 13a. Roller base 1
1 is placed vertically in the middle part sandwiched between two vertical surfaces 13a, 13a and rotated, and Teflon powder 12 is coated on the entire circumference.
Make sure that it is applied evenly. As in the case of the first embodiment, the bias power supply 18 is applied to the phase electric field curtain 13 side in parallel with the three-phase power supply 15.

帯電されたテフロン粉12の投入は、一方の垂直面部1
3aのL方より行うようにされているが、第8図に仮砦
線で示すように他方の垂直面部13aのL方にも駒人路
14を別に設けて、両方から供給するようにしてもよい
。バイアス電源18の印加方向は、との例に11k(ら
ずテフロン粉12の帯電極性に応じて任意に設定しうろ
ことは勿論である。
Charged Teflon powder 12 is introduced into one vertical surface section 1.
3a, but as shown by the temporary fort line in Fig. 8, another piece route 14 is also provided on the L side of the other vertical surface portion 13a, so that it is supplied from both sides. Good too. It goes without saying that the direction of application of the bias power supply 18 can be arbitrarily set depending on the charging polarity of the Teflon powder 12, as shown in the example 11k.

この実施例の場合、位相電界カーテン13の2つの垂直
面jη1(13a、13aの間を、この垂直面部13a
と平行に第9図に示すように、順次ローラ基体11・・
・を回転さぜながら搬送するようにすれば、桧布処坤を
連続的に行うことができ、作業能率を大幅に向上させる
ことができる。この場合の搬送手段、回転+段について
は図示しないが、その%V/1fflについては公知の
種々の構造のものを利用しうる。
In this embodiment, between the two vertical surfaces jη1 (13a, 13a) of the phase electric field curtain 13, this vertical surface portion 13a
As shown in FIG. 9, the roller base 11...
By rotating and conveying the cypress cloth, it is possible to carry out the cypress cloth processing continuously, and the work efficiency can be greatly improved. Although the conveyance means and rotation + stages in this case are not shown, various known structures can be used for the %V/1ffl.

なお第8図の構成において、このような断面形状をなす
位相電界カーテンの多面体でローラ基体を筒状に囲み、
各カーテン面ごとに多相交流電源を接続するようKすれ
は一ローラ基体のまわりの全周にわたってテフロン粉の
上下への循環が行われるので、均一塗布をはかるうえで
、ローラ基体の回転は必ずしも必要ではなくなる。
In addition, in the configuration shown in FIG. 8, the roller base is surrounded in a cylindrical shape by a polyhedron of the phase electric field curtain having such a cross-sectional shape,
In order to connect a multi-phase AC power supply to each curtain surface, the Teflon powder is circulated up and down over the entire circumference of one roller base, so in order to achieve uniform coating, the rotation of the roller base is not always necessary. It's no longer necessary.

この発明の第5の実施例を第10図に示す。この実施例
では、位相電界カーテン13の構成を、先の第1の実施
例の構成に加えて、そのL半部の立トリ面部13oにお
いて、これと対向する補助カーテン部13’を別に並設
し、2つのカーテンが対向し合う路域でのテフロン粉1
2の上昇移動の効果が大11171 K向丘するように
している。同図において、21はカーテン駆動用の三相
電源とバイアス電源の各電圧を重畳してカーテン側に印
加するための電源部である。
A fifth embodiment of the invention is shown in FIG. In this embodiment, in addition to the configuration of the phase electric field curtain 13 as in the first embodiment, an auxiliary curtain section 13' facing the upright surface section 13o of the L half is separately arranged in parallel. Teflon powder 1 in the area where two curtains face each other
The effect of 2's upward movement is large 11171K. In the figure, reference numeral 21 denotes a power supply unit for superimposing voltages from a three-phase power supply for driving the curtain and a bias power supply and applying the superimposed voltages to the curtain side.

ここでは、2つのカーテン面で挾まれる上昇移送路部を
経てローラ基体11の真上位置に至って、テフロン粉1
2が始めて降下するので、その落下と電界による吸引作
用とKより、ローラ基体11へのテフロン粉12の電着
効果がLる。テフロン粉12の吸着はローラ基体11の
L方局域に偏るので、との場合、ローラ基体11を回転
させることは、均一塗布をはかるうえで必須の要件であ
る。
Here, the Teflon powder 1 reaches a position directly above the roller base 11 through an ascending transfer path sandwiched between two curtain surfaces.
2 descends for the first time, the effect of electrodeposition of the Teflon powder 12 on the roller base 11 is L due to its falling, the attraction effect by the electric field, and K. Since the adsorption of the Teflon powder 12 is biased toward the L-direction area of the roller base 11, in this case, rotating the roller base 11 is an essential requirement for uniform application.

以りの各実施例では、テフロン粉を塗布する場合につい
てd;す明したが、アクリル粉、塩ビ粉などの粉体の場
合にも、同様にしてこの発明の静電塗布方法を適°用し
うることは勿論である。
In each of the following Examples, the case of applying Teflon powder has been described, but the electrostatic coating method of the present invention can be similarly applied to powders such as acrylic powder and PVC powder. Of course it is possible.

効 果 この発明によれば、バイアス印加した塗布目的物の近傍
に、荷電粉体を位相電場で循環搬送することによシ、該
塗布目的物に荷電粉体を均一に付着せしめるようにした
から、さほど高いバイアスを要することなく塗布目的物
への荷電粉体の効果的な電着がはかれるとともに、塗布
目的物の囲りのイオン電流密度も小さいので、一旦塗布
目的物に付着した荷電粉体による電場阻止ポテンシャル
が相、対重に強ま如、均一塗布が可能となり、またバイ
アスの加減により塗布膜厚のコントロールも容易に行う
ことができる。
Effects According to the present invention, the charged powder is uniformly adhered to the coating object by circulating the charged powder using a phase electric field in the vicinity of the coating object to which a bias is applied. , the charged powder can be effectively electrodeposited onto the object to be coated without requiring a very high bias, and the ionic current density around the object to be coated is also small, so that the charged powder once attached to the object to be coated can be easily electrodeposited. As the electric field blocking potential increases relative to each other, uniform coating becomes possible, and the coating film thickness can be easily controlled by adjusting the bias.

さらに、荷電粉体は位相電場により塗布目的物の囲りを
循環するので1粉体が散逸せず無駄に浪費されないばか
りでなく、処理速度も早くなり作業能率が向トする。し
かも塗布処理のためにさほどの空間も占有しないので、
この方法を適用するための装置もコンパクトに構成でき
る。
Furthermore, since the charged powder is circulated around the object to be coated by the phase electric field, not only one powder is not scattered and wasted, but also the processing speed is increased and work efficiency is improved. Moreover, it does not take up much space for the coating process, so
The apparatus for applying this method can also be configured compactly.

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

第1図および第2図はそれぞれ従来例を示す概略図、第
3図はこの発明の第1の実施例を示す概略断面図、第4
図はその位相電界カーテンの構造を示す説明1テ、第5
図は位相?’に界カーテンの他のシート構造例を示す助
1m図、第6図は第2の実施例を示す概略断面図、第7
図は第3の実施例を示す概略断面図、第81Xおよび第
9図はそれぞれ第4の実施例を示す概略断面図および概
略斜面図、第10図は第5の実施例を示す概略断面図で
ある。 11・・・ローラ基体(顔布目的物)、12・・・テフ
ロン粉(荷電粉体)、 14・・・尋入路、1B・・・バイアス鼠源、19・・
・帯電手段、21・・・電源部 出願人 ミノルタカメラ株式会社 (つ 第1図 第2図 第5図 第4図 ゞ−7 \〜 1冴11
1 and 2 are schematic views showing a conventional example, FIG. 3 is a schematic sectional view showing a first embodiment of the present invention, and FIG.
The figure shows the structure of the phase electric field curtain.
Is the diagram a phase? Figure 6 is a schematic sectional view showing the second embodiment, Figure 7 is a schematic sectional view showing another example of the sheet structure of the curtain.
The figure is a schematic sectional view showing the third embodiment, Figures 81X and 9 are a schematic sectional view and schematic slope view showing the fourth embodiment, respectively, and Figure 10 is a schematic sectional view showing the fifth embodiment. It is. DESCRIPTION OF SYMBOLS 11...Roller base (facial cloth object), 12...Teflon powder (charged powder), 14...Falling passage, 1B...Bias mouse source, 19...
・Charging means, 21...Power supply department Applicant: Minolta Camera Co., Ltd. (Figure 1, Figure 2, Figure 5, Figure 4)

Claims (2)

【特許請求の範囲】[Claims] (1) バイアス印加した塗布目的物の近傍に、荷電粉
体を位相電場で循環搬送することにより、該塗布目的物
に荷電粉体を均一に付着せしめる静電塗布方法
(1) An electrostatic coating method in which charged powder is uniformly adhered to the object to be coated by circulating the charged powder using a phase electric field near the object to be coated to which a bias is applied.
(2)前記塗布目的物は回転される特許請求の範囲第(
1)項記載の静電塗布方法
(2) The coating object is rotated.
Electrostatic coating method described in section 1)
JP21058683A 1983-11-08 1983-11-08 Electrostatic coating method Granted JPS60102977A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21058683A JPS60102977A (en) 1983-11-08 1983-11-08 Electrostatic coating method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21058683A JPS60102977A (en) 1983-11-08 1983-11-08 Electrostatic coating method

Publications (2)

Publication Number Publication Date
JPS60102977A true JPS60102977A (en) 1985-06-07
JPH0114822B2 JPH0114822B2 (en) 1989-03-14

Family

ID=16591767

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21058683A Granted JPS60102977A (en) 1983-11-08 1983-11-08 Electrostatic coating method

Country Status (1)

Country Link
JP (1) JPS60102977A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2002216257B2 (en) * 2000-12-21 2006-01-19 Glaxo Group Limited Electrostatic application of powder material to solid dosage forms in an electric field

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2002216257B2 (en) * 2000-12-21 2006-01-19 Glaxo Group Limited Electrostatic application of powder material to solid dosage forms in an electric field
US7384661B2 (en) 2000-12-21 2008-06-10 Phoqus Pharmaceuticals Limited Electrostatic application of powder material to solid dosage forms in an electric field

Also Published As

Publication number Publication date
JPH0114822B2 (en) 1989-03-14

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