JPH09290183A - Method and apparatus for electrostatic powder coating - Google Patents

Method and apparatus for electrostatic powder coating

Info

Publication number
JPH09290183A
JPH09290183A JP13104296A JP13104296A JPH09290183A JP H09290183 A JPH09290183 A JP H09290183A JP 13104296 A JP13104296 A JP 13104296A JP 13104296 A JP13104296 A JP 13104296A JP H09290183 A JPH09290183 A JP H09290183A
Authority
JP
Japan
Prior art keywords
powder coating
powder
coating material
charge
coated
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
Application number
JP13104296A
Other languages
Japanese (ja)
Inventor
Shinichiro Yasuda
晋一朗 安田
Yukiya Sato
幸哉 佐藤
Masayuki Maruta
将幸 丸田
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.)
Kao Corp
Original Assignee
Kao Corp
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 Kao Corp filed Critical Kao Corp
Priority to JP13104296A priority Critical patent/JPH09290183A/en
Publication of JPH09290183A publication Critical patent/JPH09290183A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/047—Discharge apparatus, e.g. electrostatic spray guns using tribo-charging

Landscapes

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

Abstract

PROBLEM TO BE SOLVED: To form a smooth, uniform coating film which reduces the sticking of refuse by mixing powder coating and charge donating powder and casting the mixture onto a surface to be coated having an electric potential different from that of the mixture to form the coating film on the surface. SOLUTION: Powder coating and charge donating powder are mixed in a main body 2 by a rotor 7, and the powder coating is charged by static electricity generated by the friction of the particles. When the mixture is dropped from a slit 12 to flow down on a surface 6 to be coated which is charged reversely to the powder coating, the coating is attracted to the surface 6 to form a coating film. The electrode 5 charged similarly to the powder coating prevents the coating from scattering from the surface 6. The powder which flowed down from the surface 6 is recovered in a recovery case 3. The powder coating passes through a filter 31 and is recovered from a suction duct 32 into a coating recovery tank by a blower 33. Besides, the charge donating powder is returned to the main body 2.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、粉体静電塗装を行
なうための方法と装置に関する。FIELD OF THE INVENTION The present invention relates to a method and an apparatus for performing electrostatic powder coating.

【０００２】[0002]

【従来の技術と発明が解決しようとする課題】近年、地
球環境の変化が問題視され、国際レベルで地球環境を悪
化させない努力がなされてきている。塗装技術の分野に
おいても、有機溶剤を含む塗料は、塗装中の有機溶剤の
飛散による公害、揮発性有機物（ＶＯＣ）による環境汚
染や悪臭が問題になる。そこで、塗料のハイソリッド化
や水性化、さらには粉体塗装法が開発されている。特
に、粉体塗装法は全く有機溶剤を含まない粉体塗料を用
いるため、有機溶剤による公害や災害の問題がなく好ま
しいものである。また、粉体塗装法は厚塗りが容易で、
自動化がし易いという長所を有する。2. Description of the Related Art In recent years, changes in the global environment have become a problem, and efforts have been made to prevent the global environment from deteriorating at the international level. Also in the field of coating technology, paint containing an organic solvent poses problems of pollution due to scattering of the organic solvent during coating, environmental pollution and volatile odors due to volatile organic substances (VOC). Therefore, a high-solid or water-based paint and a powder coating method have been developed. In particular, since the powder coating method uses a powder coating containing no organic solvent at all, it is preferable because there is no problem of pollution or disaster caused by the organic solvent. Also, the powder coating method is easy to apply thickly,
It has the advantage of being easy to automate.

【０００３】その粉体塗装法の一つとして静電粉体塗装
法がある。これは、粉体塗料を正極または負極に帯電さ
せ、接地した塗装対象に吹き付けることで塗膜を形成す
るものである。この静電粉体塗装法を行なうため、コロ
ナガンやトリボガンと呼ばれる粉体塗装用ガンを用い、
粉体塗料を帯電させて噴出することが行なわれている。One of the powder coating methods is an electrostatic powder coating method. In this method, a powder coating is charged on a positive electrode or a negative electrode and sprayed on a grounded coating object to form a coating film. In order to perform this electrostatic powder coating method, a powder coating gun called corona gun or tribo gun is used,
The powder paint is electrically charged and ejected.

【０００４】そのコロナガンは、粉体塗料の噴出口のコ
ロナ電極に、高電圧発生装置を用いて例えば７０〜１０
０ＫＶの高電圧を印加し、そのコロナ電極から放電を行
なうことで、圧力空気により搬送される粉体塗料を帯電
させるものである。これにより、その帯電した粉体塗料
は、コロナガンと塗装対象との間に形成される電場内を
飛行し、塗装対象に付着して塗膜を形成する。The corona gun is, for example, 70 to 10 by using a high voltage generator for the corona electrode at the powder paint jetting outlet.
By applying a high voltage of 0 KV and discharging the corona electrode, the powder coating material carried by the pressurized air is charged. As a result, the charged powder coating material flies in the electric field formed between the corona gun and the coating object and adheres to the coating object to form a coating film.

【０００５】しかし、コロナガンを用いる場合、コロナ
電極から放電されたイオンの僅か数％程度しか粉体塗料
の帯電に利用されない。その利用されなかったイオンに
より、オゾンが生成されて臭気が発生する。また、バッ
クアイオニゼーションと呼ばれる静電反発が速いため、
塗膜にクレーターやピンホールを発生させ易い。また、
ファラディケージ効果と呼ばれる塗装対象の凹部への粉
体塗料の入り込みが悪くなる現象が発生する。そのた
め、粉体塗料の塗着効率が低く、表面が滑らかで均一な
塗膜を得るのが困難であるという欠点がある。また、塗
膜にゴミが付着し易いという問題がある。However, when a corona gun is used, only a few percent of the ions discharged from the corona electrode are used to charge the powder coating material. The unused ions generate ozone and generate odor. Also, because electrostatic repulsion called back ionization is fast,
It is easy to create craters and pinholes in the coating film. Also,
A phenomenon called the Faraday cage effect occurs in which the powder coating material does not easily get into the recesses to be coated. For this reason, there are drawbacks in that the efficiency of applying the powder coating is low and it is difficult to obtain a uniform coating film with a smooth surface. In addition, there is a problem that dust easily adheres to the coating film.

【０００６】従来のトリボガンは、真直な搬送路におい
て圧力空気により粉体塗料を搬送し、その搬送路を囲む
搬送面と粉体塗料との間の摩擦により静電気を発生させ
ることで、その粉体塗料を帯電させるものである。その
ため、コロナガンを用いる場合に発生するイオン流がな
いことから、オゾンによる臭気発生がなく、塗装対象の
凹部への粉体塗料の入り込み性が良い。また、コロナガ
ンに比較して静電反発が遅いことから、塗膜にクレータ
ーやピンホールが生じ難い。これにより、表面が滑らか
で均一な塗膜を得やすく、また、塗膜へのゴミ付着も少
ない。In the conventional tribo gun, powder coating material is conveyed by pressure air in a straight conveying path, and static electricity is generated by friction between the conveying surface surrounding the conveying path and the powder coating material, thereby generating the powder. It charges the paint. Therefore, since there is no ion flow generated when a corona gun is used, odor is not generated by ozone, and the powder coating material can easily enter the concave portion to be coated. In addition, since electrostatic repulsion is slower than that of corona gun, craters and pinholes are less likely to occur in the coating film. Thereby, it is easy to obtain a uniform coating film having a smooth surface, and less dust adheres to the coating film.

【０００７】しかし、上記従来のトリボガンでは、粉体
塗料の搬送路が略真直であるため、搬送面と粉体塗料粒
子との接触機会が少なく、帯電効率が悪かった。そのた
め、最大噴出量が少なく、塗着効率が低く、塗装対象の
面積が大きい場合は塗装に長時間を要する。However, in the above-mentioned conventional tribo gun, since the transport path for the powder coating material is substantially straight, there is little chance of contact between the transport surface and the powder coating material particles, and the charging efficiency is poor. Therefore, when the maximum ejection amount is small, the coating efficiency is low, and the area to be coated is large, the coating takes a long time.

【０００８】また、多数の屈曲した細管の内部を粉体塗
料の搬送路とすることで、搬送路の内面の面積を大きく
し、搬送路の内面と粉体塗料粒子との接触機会を多くし
て帯電効率を向上するトリボガンが提案されている（特
開昭５６‐８５５４号）。Further, the inside of a large number of bent thin tubes is used as a conveying path for the powder coating material, thereby increasing the area of the inner surface of the conveying path and increasing the chances of contact between the inner surface of the conveying path and the powder coating particles. A tribo gun that improves the charging efficiency has been proposed (JP-A-56-8554).

【０００９】しかし、多数の屈曲した細管を粉体塗料の
搬送路とする場合、構造が複雑になるため、高価にな
り、メンテナンスが困難になる。また、構造が複雑にな
るため清掃も困難になり、異なる色の粉体塗料を用いる
塗装が困難になる。However, when a large number of bent thin tubes are used as the transport path for the powder coating material, the structure becomes complicated, so that the cost becomes high and the maintenance becomes difficult. Further, since the structure becomes complicated, cleaning becomes difficult, and it becomes difficult to apply powder paints of different colors.

【００１０】また、粉体塗料の搬送路に旋回翼を設ける
ことで、粉体塗料を旋回させ、搬送路の内面と粉体塗料
粒子との接触機会を多くして帯電効率を向上するトリボ
ガンが提案されている（特開平７‐２４３６６号）。Further, by providing a swirl vane on the conveying path for the powder coating, the tribo gun for swirling the powder coating and increasing the chances of contact between the inner surface of the conveying path and the powder coating particles to improve the charging efficiency. It has been proposed (Japanese Patent Laid-Open No. 7-24366).

【００１１】しかし、粉体塗料の搬送路の内面における
摩耗が早いため、寿命が短かくなるという欠点がある。
また、従来の粉体塗装による塗膜の厚さは１００μｍ〜
３００μｍ程度であったのが、近年は４０μｍ〜２５μ
ｍ程度の厚さの薄膜の塗工も要求されている。そのた
め、粉体塗料を構成する各粒子の平均径を、従来は４０
μｍ〜３０μｍ程度であったものを、２０μｍ〜１０μ
ｍ程度まで小径化する必要がある。しかし、粒子径が小
さくなると、比表面積が格段に大きくなる。そうする
と、従来のトリボガンでは、搬送面と粉体塗料粒子との
接触機会を十分に大きくすることは困難で、帯電効率が
大幅に低下する。そのため、最大噴出量がより少なくな
り、塗着効率がより低くなり、塗装対象の面積が大きい
場合は塗装が困難になる。However, there is a drawback in that the wear of the inner surface of the transport path of the powder coating material is fast, so that the life is shortened.
Moreover, the thickness of the coating film formed by conventional powder coating is 100 μm or more.
Although it was about 300 μm, in recent years it was 40 μm to 25 μm.
It is also required to apply a thin film having a thickness of about m. Therefore, the average diameter of each particle that constitutes the powder coating is 40
What was about 30 μm to 20 μm to 10 μm
It is necessary to reduce the diameter to about m. However, when the particle size is small, the specific surface area is remarkably large. Then, in the conventional tribo gun, it is difficult to sufficiently increase the chance of contact between the conveying surface and the powder coating particles, and the charging efficiency is significantly reduced. Therefore, the maximum ejection amount becomes smaller, the coating efficiency becomes lower, and the coating becomes difficult when the area to be coated is large.

【００１２】また、従来の静電粉体塗装用ガンでは、粉
体塗料を塗装対象面に吹き付けるため、圧力空気の供給
設備が必要であった。Further, in the conventional electrostatic powder coating gun, the powder paint is sprayed onto the surface to be coated, so that a facility for supplying pressurized air is required.

【００１３】本発明は、上記問題を解決することのでき
る静電粉体塗装方法と静電粉体塗装装置とを提供するこ
とを目的とする。It is an object of the present invention to provide an electrostatic powder coating method and an electrostatic powder coating apparatus which can solve the above problems.

【００１４】[0014]

【課題を解決するための手段】本発明の静電粉体塗装方
法は、粉体塗料と、この粉体塗料との摩擦により発生す
る静電気により粉体塗料を帯電させることが可能な電荷
付与粉体とを混合し、その混合した粉体塗料と電荷付与
粉体とを、その粉体塗料と電位差を有する塗装対象面上
に流れ落とすことで、その塗装対象面上に塗膜を形成す
ることを特徴とする。The electrostatic powder coating method according to the present invention is a powder to be charged and a charge-imparting powder capable of charging the powder coating by static electricity generated by friction between the powder coating and the powder coating. Forming a coating film on the surface to be coated by mixing the body and flowing the mixed powder coating and charge-imparting powder onto the surface to be coated having a potential difference with the powder coating. Is characterized by.

【００１５】本発明によれば、粉体塗料と電荷付与粉体
との混合により、その粉体塗料を正極または負極に帯電
させることができる。その粉体塗料と電荷付与粉体と
を、その粉体塗料と電位差を有する塗装対象面上に流れ
落とすことで、その粉体塗料は塗装対象面に吸着される
ので、塗膜を形成することができる。よって、オゾンに
よる臭気発生がなく、塗装対象の凹部への粉体塗料の入
り込み性が良く、塗膜にクレーターやピンホールが生じ
難い。これにより、表面が滑らかで均一な塗膜を得やす
く、また、塗膜へのゴミ付着も少ない。その静電気は、
電荷付与粉体と粉体塗料との接触により発生し、その接
触機会は電荷付与粉体粒子の数に比例して多くなるの
で、粉体塗料の帯電効率を大幅に向上することができ
る。その帯電効率の向上により、塗着効率を高くするこ
とで、塗装対象の面積が大きい場合でも短時間での塗装
を可能にする。また、構造が簡単であるため、低コスト
になり、メンテナンスが容易になり、清掃も容易なので
異なる色の粉体塗料を用いる塗装を容易にできる。ま
た、その粉体塗料と電荷付与粉体とは、塗装対象面上に
流れ落とすだけでよいので、粉体塗料の搬送面が摩耗す
ることはなく、また、塗装対象面まで搬送するための圧
力空気等の設備が不要である。さらに、その塗装対象面
に過剰に付着した粉体塗料を、電荷付与粉体により掻き
落とすことで、表面が滑らかで全面が均一な薄膜塗工が
可能になる。According to the present invention, the powder coating can be charged to the positive electrode or the negative electrode by mixing the powder coating and the charge-imparting powder. Since the powder coating material and the charge-imparting powder flow down onto the surface to be coated having a potential difference with the powder coating material, the powder coating material is adsorbed to the surface to be coated, so that a coating film is formed. You can Therefore, odor is not generated by ozone, the powder coating material can easily enter the concave portion to be coated, and craters and pinholes are unlikely to occur in the coating film. Thereby, it is easy to obtain a uniform coating film having a smooth surface, and less dust adheres to the coating film. The static electricity
It is generated by the contact between the charge-imparting powder and the powder coating material, and the chance of contact increases in proportion to the number of the charge-imparting powder particles, so that the charging efficiency of the powder coating material can be significantly improved. By improving the charging efficiency and increasing the coating efficiency, it is possible to coat in a short time even when the area of the coating object is large. Further, since the structure is simple, the cost is low, the maintenance is easy, and the cleaning is easy, so that it is possible to easily apply the powder paints of different colors. Also, since the powder coating material and the charge-imparting powder need only flow down onto the surface to be coated, the transport surface of the powder coating material will not be worn, and the pressure for transporting to the surface to be coated will not occur. No equipment such as air is required. Furthermore, by scraping off the powder coating material excessively adhered to the surface to be coated with the charge-imparting powder, it is possible to apply a thin film having a smooth surface and a uniform surface.

【００１６】その粉体塗料と同じ極に帯電した電極を、
その塗装対象面に対向して配置するのが好ましい。これ
により、粉体塗料が塗装対象面から離反して飛散するの
を抑制でき、汚染防止ができる。The electrode charged to the same pole as the powder coating,
It is preferable to arrange it so as to face the surface to be coated. As a result, it is possible to prevent the powder coating material from separating from the surface to be coated and scattering and to prevent contamination.

【００１７】その塗装対象面の下方に流れ落ちた電荷付
与粉体を回収し、その回収した電荷付与粉体を粉体塗料
と混合し、その混合した粉体塗料と電荷付与粉体とを前
記塗装対象面上に流れ落とすのが好ましい。これによ
り、電荷付与粉体の無駄をなくせる。さらに、その塗装
対象面の下方に粉体塗料と共に流れ落ちた電荷付与粉体
を、その粉体塗料から分離回収するのが好ましい。これ
により、一旦帯電した粉体塗料が、塗膜を構成する粉体
塗料の帯電量を不均一にするのを防止できる。The charge-giving powder that has flowed down below the surface to be coated is collected, the collected charge-giving powder is mixed with powder coating, and the mixed powder coating and charge-giving powder are applied as described above. It is preferable to drop it on the target surface. This eliminates waste of the charge-imparting powder. Furthermore, it is preferable to separate and collect the charge-imparting powder that has flowed down with the powder coating material below the surface to be coated from the powder coating material. This can prevent the once-charged powder coating material from making the charge amount of the powder coating material forming the coating film non-uniform.

【００１８】その粉体塗料と電荷付与粉体との混合比を
検出し、その検出値に応じて粉体塗料の混合量を制御す
るのが好ましい。これにより、その混合比を一定に保つ
ことで、過剰な粉体塗料の飛散による汚染を防止し、粉
体塗料の帯電量を一定にし、均一な塗膜を形成できる。It is preferable to detect the mixing ratio of the powder coating material and the charge-imparting powder and control the mixing amount of the powder coating material according to the detected value. With this, by keeping the mixing ratio constant, it is possible to prevent contamination due to excessive scattering of the powder coating material, make the charge amount of the powder coating material constant, and form a uniform coating film.

【００１９】本発明の静電粉体塗装装置は、粉体塗料
と、この粉体塗料との摩擦により発生する静電気により
粉体塗料を帯電させることが可能な電荷付与粉体とを混
合する手段と、帯電した粉体塗料との電位差を塗装対象
面に生じさせる手段と、その混合した粉体塗料と電荷付
与粉体とを、その塗装対象面上に流れ落とす手段とを備
えることを特徴とする。この装置によれば、本発明の静
電粉体塗装方法を実施できる。その粉体塗料の混合量を
制御可能であるのが好ましい。これにより、塗膜の厚さ
を任意に制御でき、また、粉体塗料の帯電量を一定に
し、均一な塗膜を形成できる。その塗装対象面と帯電し
た粉体塗料との電位差を制御する手段を備えるのが好ま
しい。これにより、その電位差に応じて塗膜の厚さを制
御できる。The electrostatic powder coating apparatus of the present invention mixes the powder coating material and the charge-imparting powder capable of charging the powder coating material by the static electricity generated by the friction with the powder coating material. And means for causing a potential difference from the charged powder coating material on the surface to be coated, and means for causing the mixed powder coating material and the charge-imparting powder to flow down onto the surface to be coated. To do. With this apparatus, the electrostatic powder coating method of the present invention can be carried out. It is preferable that the mixing amount of the powder coating material can be controlled. Thereby, the thickness of the coating film can be arbitrarily controlled, and the charge amount of the powder coating material can be made constant to form a uniform coating film. It is preferable to provide a means for controlling the potential difference between the surface to be coated and the charged powder coating material. Thereby, the thickness of the coating film can be controlled according to the potential difference.

【００２０】[0020]

【発明の実施の形態】以下、図面を参照して本発明の実
施形態を説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

【００２１】図１に示す静電粉体塗装装置１は、本体２
と、この本体２の下方に配置される回収ケース３と、そ
の本体２と回収ケース３とを接続する回収ダクト４と、
その本体２と回収ケース３との間に配置される板状の電
極５とを備える。その本体２の下方が塗装位置とされ、
この塗装位置に塗装対象面６が配置される。本実施形態
では、その塗装対象面６は板状の塗料対象物の片面であ
って、鉛直面に対して傾斜して配置される。その電極５
は、その塗装対象面６に対向するように配置される。そ
の本体２、回収ケース３、電極５は、図外固定構造物に
固定される。その塗装対象物は、その塗装位置に図外コ
ンベア等により搬入され、塗膜形成後に搬出される。The electrostatic powder coating apparatus 1 shown in FIG.
A recovery case 3 disposed below the main body 2, a recovery duct 4 connecting the main body 2 and the recovery case 3,
A plate-shaped electrode 5 is provided between the main body 2 and the recovery case 3. The lower part of the main body 2 is the painting position,
The surface 6 to be coated is arranged at this coating position. In the present embodiment, the coating target surface 6 is one surface of the plate-shaped coating target object and is arranged to be inclined with respect to the vertical plane. The electrode 5
Are arranged so as to face the surface 6 to be coated. The main body 2, the recovery case 3, and the electrode 5 are fixed to a non-illustrated fixing structure. The object to be coated is carried into the coating position by a conveyor such as a non-illustrated conveyor, and is carried out after forming the coating film.

【００２２】図２に示すように、その本体２の内部に
は、外周に螺旋状の翼を有するオーガ状の回転体７が設
けられ、図外駆動機構により回転駆動される。その本体
２の一端側に、ホッパー１０からスクリューコンベア１
１により粉体塗料が供給され、また、予め電荷付与粉体
が充填される。その粉体塗料の本体２への供給量は、そ
のスクリューコンベア１１の回転量に応じたものとされ
る。その本体２の内部の粉体塗料と電荷付与粉体とは、
その回転体７の回転により混合されると共に本体２の他
端側に搬送されることで、その本体２の他端側の底部に
設けられたスリット１２から落下する。As shown in FIG. 2, an auger-shaped rotating body 7 having spiral blades on the outer periphery is provided inside the main body 2 and is rotationally driven by a drive mechanism (not shown). From one side of the main body 2 to the screw conveyor 1 from the hopper 10.
1, the powder coating material is supplied, and the charge-imparting powder is filled in advance. The supply amount of the powder coating material to the main body 2 depends on the rotation amount of the screw conveyor 11. The powder coating and the charge-imparting powder inside the main body 2 are
By being mixed by the rotation of the rotating body 7 and being conveyed to the other end side of the main body 2, it falls from the slit 12 provided on the bottom portion of the other end side of the main body 2.

【００２３】その電荷付与粉体の材質は、粉体塗料との
摩擦により発生する静電気により粉体塗料を帯電させる
ことが可能な物質とされ、本実施形態では絶縁性と磁性
とを有する。例えば、電荷付与粉体を構成する各粒子１
５は、磁性粉末と合成樹脂バインダーとを混合して粒状
にしたものにより構成できる。これにより、その本体２
から電荷付与粉体と共に落下する粉体塗料を構成する各
粒子１６は、正または負に帯電する。なお、電荷付与粉
体としては、絶縁性材の方が温度等の環境の影響を受け
難いが、環境の影響が問題にならなければ導電性材を用
いてもよい。また、電荷付与粉体としては、磁性材を用
いることで粉体塗料と電荷付与粉体との混合比の検出が
容易になるが、その磁性に基づく検出の必要がなければ
非磁性材を用いてもよい。The material of the charge-imparting powder is a substance capable of charging the powder coating material by the static electricity generated by friction with the powder coating material, and in this embodiment, it has insulation and magnetism. For example, each particle 1 that constitutes the charge-imparting powder
No. 5 can be composed of a mixture of magnetic powder and synthetic resin binder which is granulated. As a result, the main body 2
The particles 16 that make up the powder coating material that falls from the surface along with the charge-imparting powder are positively or negatively charged. As the charge-giving powder, an insulating material is less likely to be affected by the environment such as temperature, but a conductive material may be used as long as the environment does not cause a problem. As the charge-imparting powder, it is easy to detect the mixing ratio between the powder coating material and the charge-imparting powder by using a magnetic material. May be.

【００２４】各電荷付与粉体粒子１５の径は、各粉体塗
料粒子１６の径よりも大きくされる。また、各電荷付与
粉体粒子１５の比重は、各粉体塗料粒子１６の比重より
も大きくされる。The diameter of each charge-imparting powder particle 15 is made larger than the diameter of each powder coating particle 16. Further, the specific gravity of each charge-imparting powder particle 15 is made larger than that of each powder coating particle 16.

【００２５】その電荷付与粉体の帯電を助長するため、
その本体２に直流電源２２の一方の極が接続され、他方
の極が接地される。その本体２は導電性部材により形成
される。In order to promote the charging of the charge-imparting powder,
One pole of the DC power source 22 is connected to the main body 2 and the other pole is grounded. The main body 2 is formed of a conductive member.

【００２６】その本体２から落下する電荷付与粉体と粉
体塗料とが、上記塗装対象面６上を流れ落ちるように、
塗装対象物は配置される。帯電した粉体塗料との電位差
を塗装対象面６に生じさせるため、その塗装対象面６
は、その粉体塗料と逆の極に帯電される。そのため、直
流電源２０が設けられ、その電源２０の一方の極が塗装
対象物の一端側に接続され、他方の極が接地される。そ
の電源２０により塗装対象面６に印加される電圧は変更
調節能とされている。なお、その電源２０から塗装対象
面６に印加される電圧は、その塗装対象物を搬送するコ
ンベアを介して印加することができる。なお、その塗装
対象面６と帯電した粉体塗料との電位差を制御する必要
がなければ、その塗装対象面を帯電させることなく接地
するだけでもよい。Charge-giving powder and powder paint falling from the main body 2 are made to flow down on the surface 6 to be coated,
The object to be painted is placed. Since a potential difference from the charged powder coating material is generated on the coating target surface 6, the coating target surface 6
Is charged to the opposite pole from its powder coating. Therefore, the DC power source 20 is provided, one pole of the power source 20 is connected to one end side of the object to be coated, and the other pole is grounded. The voltage applied to the surface 6 to be coated by the power source 20 has a variable adjustment capability. The voltage applied from the power source 20 to the surface 6 to be coated can be applied via a conveyor that conveys the object to be coated. If it is not necessary to control the potential difference between the surface 6 to be coated and the charged powder coating material, the surface to be coated may be grounded without being charged.

【００２７】上記電極５を、その粉体塗料と同じ極に帯
電する手段として、直流電源２１が設けられ、その電源
２１の一方の極が電極５の一端側に接続され、他方の極
が接地される。A DC power supply 21 is provided as means for charging the electrode 5 to the same pole as that of the powder paint, one pole of the power supply 21 is connected to one end of the electrode 5, and the other pole is grounded. To be done.

【００２８】その回収ケース３の底面はフィルター３１
とされている。そのフィルター３１は、粉体塗料の通過
を許容すると共に電荷付与粉体の通過を阻止する。この
回収ケース３の底部には吸引ダクト３２が接続され、そ
の吸引ダクト３２はブロア３３を介して図外粉体塗料回
収槽に接続される。また、その回収ケース３の内部には
スクリューコンベア３４が設けられる。このスクリュー
コンベア３４の回転により、回収ケース３に回収された
電荷付与粉体は、上記回収ダクト４を介して本体２に還
流する。なお、その回収ダクト４内にも、スクリューコ
ンベア等の搬送手段を設けてもよい。The bottom of the recovery case 3 has a filter 31.
It has been. The filter 31 permits passage of the powder coating material and blocks passage of the charge-imparting powder. A suction duct 32 is connected to the bottom of the recovery case 3, and the suction duct 32 is connected to a non-illustrated powder paint recovery tank via a blower 33. A screw conveyor 34 is provided inside the recovery case 3. The rotation of the screw conveyor 34 causes the charge-imparting powder collected in the collection case 3 to flow back to the main body 2 via the collection duct 4. A transporting means such as a screw conveyor may be provided in the recovery duct 4.

【００２９】上記本体２から落下する粉体塗料と電荷付
与粉体との混合比を検出するセンサ４１が設けられてい
る。その混合比は、電荷付与粉体の磁性に基づく粉体塗
料と電荷付与粉体との混合物の物性値であって、その混
合比に対応するものから検出できる。例えば、その混合
物の透磁率から検出できる。そのセンサ４１の検出値
は、上記スクリューコンベア１１のコントローラ４２に
入力される。そのコントローラ４２は、その検出値に応
じてスクリューコンベア１１の回転量を制御する。これ
により、粉体塗料の混合量を制御し、その混合比が予め
設定した一定値から変動するのを防止できる。A sensor 41 for detecting the mixing ratio of the powder coating material falling from the main body 2 and the charge-imparting powder is provided. The mixture ratio is a physical property value of the mixture of the powder coating material and the charge-imparting powder based on the magnetism of the charge-imparting powder, and can be detected from the one corresponding to the mixture ratio. For example, it can be detected from the magnetic permeability of the mixture. The detection value of the sensor 41 is input to the controller 42 of the screw conveyor 11. The controller 42 controls the rotation amount of the screw conveyor 11 according to the detected value. This makes it possible to control the mixing amount of the powder coating material and prevent the mixing ratio from changing from a preset constant value.

【００３０】上記静電粉体塗装装置１は、回転体７の回
転により、本体２内で粉体塗料と電荷付与粉体とを混合
し、その粉体塗料と電荷付与粉体との摩擦により発生す
る静電気により、その粉体塗料を正極または負極に帯電
させる。しかる後に、その混合した粉体塗料と電荷付与
粉体とをスリット１２から落下させ、その粉体塗料と逆
の極に帯電した塗装対象面６上に流れ落とす。これによ
り、その粉体塗料は塗装対象面６に吸着されるので、そ
の塗装対象面６に塗膜が形成される。その塗膜の厚さ
は、その塗装対象面６に電源２０から印加される電圧を
変化させることで制御する。なお、その塗膜の厚さは、
電荷付与粉体の比重、帯電能、粒子径によっても調節で
きる。この際、その塗装対象面６に過剰に付着した粉体
塗料を、電荷付与粉体が掻き落とす。これににより、例
えば、１０μｍ〜１５μｍの薄く平滑な塗膜を作ること
も可能である。また、その粉体塗料と同じ極に帯電した
電極５が、粉体塗料が塗装対象面６から離反して飛散す
るのを抑制する。なお、その電極５に電荷付与粉体が吸
着されないように、その塗装対象面６と電極５との間隔
を設定する。その塗装対象面６の下方に流れ落ちた電荷
付与粉体と粉体塗料とは回収ケース３により回収され
る。その回収された粉体塗料は、フィルター３１を通過
し、吸引ダクト３２からブロア３３により粉体塗料回収
槽（図示省略）に回収される。これにより、電荷付与粉
体は粉体塗料から分離回収される。その回収された電荷
付与粉体を、スクリューコンベア３４により回収ダクト
４を介して本体２に還流し、その本体２内で再び粉体塗
料と混合し、その混合した粉体塗料と電荷付与粉体とを
塗装対象面６上に流れ落とす。また、コントローラ４２
は、センサ４１による粉体塗料と電荷付与粉体との混合
比の検出値に応じて、スクリューコンベア１１を回転さ
せ、そのスクリューコンベア１１の回転量に応じた粉体
塗料をホッパー１０から本体２に供給する。これによ
り、その混合比が一定になるように、粉体塗料の混合量
を制御する。以上の工程により塗装対象面６に形成され
た塗膜は、後の工程で加熱されることで塗装対象面６に
焼付けられる。The electrostatic powder coating apparatus 1 mixes the powder coating material and the charge-imparting powder in the main body 2 by the rotation of the rotating body 7, and the friction between the powder coating material and the charge-imparting powder is caused. The powder paint is charged to the positive electrode or the negative electrode by the generated static electricity. Thereafter, the mixed powder coating material and the charge-imparting powder are dropped from the slit 12 and flown onto the surface 6 to be coated which is oppositely charged to the powder coating material. As a result, the powder coating material is adsorbed on the surface 6 to be coated, so that a coating film is formed on the surface 6 to be coated. The thickness of the coating film is controlled by changing the voltage applied from the power source 20 to the surface 6 to be coated. The thickness of the coating film is
It can also be adjusted by the specific gravity, chargeability, and particle size of the charge-imparting powder. At this time, the charge-imparting powder scrapes off the powder coating material excessively attached to the surface 6 to be coated. This makes it possible to form a thin and smooth coating film having a thickness of, for example, 10 μm to 15 μm. Further, the electrode 5 charged to the same pole as the powder coating material suppresses the powder coating material from separating from the surface 6 to be coated and scattering. The distance between the coating surface 6 and the electrode 5 is set so that the charge-giving powder is not adsorbed on the electrode 5. The charge-giving powder and the powder coating material that have flowed down below the surface 6 to be coated are recovered by the recovery case 3. The recovered powder coating material passes through the filter 31 and is recovered from the suction duct 32 by the blower 33 into a powder coating material recovery tank (not shown). As a result, the charge-imparting powder is separated and collected from the powder coating material. The recovered charge-imparting powder is returned to the main body 2 by the screw conveyor 34 via the recovery duct 4, and is mixed with the powder paint again in the main body 2, and the mixed powder paint and charge-imparting powder are mixed. And are dropped onto the surface 6 to be coated. In addition, the controller 42
Rotates the screw conveyor 11 according to the detection value of the mixing ratio of the powder coating material and the charge-imparting powder by the sensor 41, and supplies the powder coating material according to the rotation amount of the screw conveyor 11 from the hopper 10 to the main body 2. Supply to. Thereby, the mixing amount of the powder coating material is controlled so that the mixing ratio becomes constant. The coating film formed on the coating target surface 6 by the above steps is baked on the coating target surface 6 by being heated in the subsequent steps.

【００３１】上記静電粉体塗装方法によれば、オゾンに
よる臭気発生がなく、塗装対象の凹部への粉体塗料の入
り込み性が良く、塗膜にクレーターやピンホールが生じ
難い。これにより、表面が滑らかで均一な塗膜を得やす
く、また、塗膜へのゴミ付着も少ない。また、粉体塗料
を帯電させる静電気は、電荷付与粉体と粉体塗料との接
触により発生し、その接触機会は電荷付与粉体粒子の数
に比例して多くなるので、粉体塗料の帯電効率を大幅に
向上することができる。その帯電効率の向上により、塗
着効率を高くすることで、塗装対象の面積が大きい場合
でも短時間での塗装を可能にする。また、構造が簡単で
あるため、低コストになり、メンテナンスが容易にな
り、清掃も容易なので異なる色の粉体塗料を用いる塗装
を容易にできる。その粉体塗料と電荷付与粉体とは、塗
装対象面６上に流れ落とすだけでよいので、粉体塗料の
搬送面が摩耗することはなく、また、塗装対象面６まで
搬送するための圧力空気等の設備が不要である。その塗
装対象面６に過剰に付着した粉体塗料を、電荷付与粉体
により掻き落とすことで、表面が滑らかで全面が均一な
薄膜塗工が可能になる。また、電極５により粉体塗料が
塗装対象面６から離反して飛散するのを抑制し、汚染防
止ができる。その塗装対象面６の下方に流れ落ちた電荷
付与粉体を回収して再利用するので、電荷付与粉体の無
駄をなくせる。その回収に際して電荷付与粉体を粉体塗
料から分離するので、一旦帯電した粉体塗料が、塗膜を
構成する粉体塗料の帯電量を不均一にするのを防止で
き、均一な塗膜を得られる。また、粉体塗料と電荷付与
粉体との混合比を容易に検出し、粉体塗料の混合量を制
御し、その混合比を一定に保つことで、過剰な粉体塗料
の飛散による汚染を防止し、粉体塗料の帯電量を一定に
し、均一な塗膜を形成できる。According to the above electrostatic powder coating method, no odor is generated by ozone, the powder coating material can easily enter the concave portion to be coated, and craters and pinholes are unlikely to occur in the coating film. Thereby, it is easy to obtain a uniform coating film having a smooth surface, and less dust adheres to the coating film. In addition, the static electricity that charges the powder coating material is generated by the contact between the charge-imparting powder and the powder coating material, and the chance of contact increases in proportion to the number of the charge-imparting powder particles. The efficiency can be greatly improved. By improving the charging efficiency and increasing the coating efficiency, it is possible to coat in a short time even when the area of the coating object is large. Further, since the structure is simple, the cost is low, the maintenance is easy, and the cleaning is easy, so that it is possible to easily apply the powder paints of different colors. Since the powder coating material and the charge-imparting powder need only flow down onto the surface 6 to be coated, the transport surface of the powder coating material does not wear, and the pressure for transporting to the surface 6 to be coated is not required. No equipment such as air is required. By scraping off the powder coating material excessively adhered to the surface 6 to be coated with the charge-imparting powder, it is possible to apply a thin film having a smooth surface and a uniform surface. In addition, the electrode 5 can prevent the powder coating material from separating from the surface 6 to be coated and scattered to prevent contamination. Since the charge-giving powder that has flowed down below the surface 6 to be coated is collected and reused, the charge-giving powder can be wasted. Since the charge-imparting powder is separated from the powder coating material at the time of collection, it is possible to prevent the once-charged powder coating material from making the charge amount of the powder coating material constituting the coating film non-uniform, and to form a uniform coating film. can get. In addition, by easily detecting the mixing ratio of the powder coating material and the charge-imparting powder, controlling the mixing amount of the powder coating material, and keeping the mixing ratio constant, contamination due to excessive powder coating material scattering can be prevented. It is possible to prevent this, to make the charge amount of the powder coating constant and form a uniform coating film.

【００３２】図３は本発明の変形例を示す。上記実施形
態との相違は、先ず、塗装対象物の両面が鉛直面に沿う
塗装対象面６とされる。また、本体２、電極５、回転体
７、ホッパー１０、スクリューコンベア１１、電源２
１、電源２２、センサ４１が、塗装対象面６に対応して
一対設けられ、コントローラ４２は各センサ４１からの
信号により各スクリューコンベア１１の回転量を個別に
制御する。また、各本体の側面にスリット１２′が設け
られ、各スリット１２′から各塗装対象面６上に混合し
た粉体塗料と電荷付与粉体とが流れ落とされる。他は上
記実施形態と同様で、同一部分は同一符号で示す。FIG. 3 shows a modification of the present invention. The difference from the above-described embodiment is that both surfaces of the object to be coated are the object surfaces 6 to be coated along the vertical plane. Further, the main body 2, the electrode 5, the rotating body 7, the hopper 10, the screw conveyor 11, the power source 2
A pair of a power source 22, a power source 22 and a sensor 41 are provided corresponding to the surface 6 to be coated, and the controller 42 individually controls the rotation amount of each screw conveyor 11 by a signal from each sensor 41. Further, a slit 12 'is provided on the side surface of each main body, and the powder coating material and the charge-imparting powder mixed on each coating target surface 6 flow off from each slit 12'. Other parts are the same as those of the above embodiment, and the same parts are denoted by the same reference numerals.

【００３３】上記静電粉体塗装方法と静電粉体塗装装置
は、均一な塗膜を得ることができるので、２種類以上の
色相の粉体塗料を混合することで単一の均一な色相の塗
膜を得るのに適している。この場合、粉体塗料を均一に
混合する上では、混合される各粉体塗料相互の緩み見掛
け密度の差は０．０２ｇ／ｃｃ以内であるのが好まし
い。粉体塗料を均一に塗装対象に塗布する上では、混合
される各粉体塗料相互の帯電量の差は５μＣ／ｇ以内で
あるのが好ましく、また、誘電率の差は０．２以内であ
るのが好ましく、また、抵抗の比は１／１０〜１０であ
るのが好ましい。塗布された粉体塗料を均一に硬化させ
る上では、混合される各粉体塗料相互の軟化点の差は５
℃以内であり、１２０℃における溶融粘度の差は３００
ｃｐ以内であり、更に好ましくは１００ｃｐ以内であ
り、硬化時間の差は２分以内であり、更に好ましくは１
分以内である。The above electrostatic powder coating method and electrostatic powder coating apparatus can obtain a uniform coating film. Therefore, by mixing powder coating materials having two or more kinds of hues, a single uniform hue can be obtained. It is suitable for obtaining a coating film. In this case, in order to uniformly mix the powder coatings, it is preferable that the difference in the loose apparent density between the powder coatings to be mixed is within 0.02 g / cc. In order to apply the powder coating material evenly to the object to be coated, it is preferable that the difference in the charge amount between the mixed powder coating materials is within 5 μC / g, and the difference in the dielectric constant is within 0.2. Preferably, the resistance ratio is preferably 1/10 to 10. In order to evenly cure the applied powder coating, the difference in softening point between the mixed powder coatings is 5
° C, and the difference in melt viscosity at 120 ° C is 300
cp, more preferably 100 cp or less, and the difference in curing time is 2 minutes or less, more preferably 1 cp or less.
Within minutes.

【００３４】なお、本発明は上記実施形態や変形例に限
定されない。例えば、回収された粉体塗料と電荷付与粉
体とを、上記実施形態では粒径の差を利用してフィルタ
ーにより篩分けたが、比重の差を利用して水洗し、篩に
より沈殿した電荷付与粉体を分離し、さらに、残りの洗
浄水を乾燥させて粉体塗料を回収し、その回収した粉体
塗料を解砕することで再利用してもよい。The present invention is not limited to the above-mentioned embodiments and modifications. For example, although the recovered powder coating material and the charge-imparting powder are screened by the filter by utilizing the difference in particle size in the above-described embodiment, they are washed with water by utilizing the difference in specific gravity and the charge precipitated by the sieve is used. Alternatively, the applied powder may be separated, the remaining cleaning water may be dried to recover the powder coating material, and the recovered powder coating material may be crushed for reuse.

【００３５】[0035]

【発明の効果】本発明によれば、表面が滑らかで均一な
ゴミ付着も少ない塗膜を得ることができ、粉体塗料の最
大噴出量を多くし、塗着効率を高くし、塗装対象の面積
が大きい場合でも短時間での塗装を可能にできる。ま
た、構造が簡単で、低コストで、メンテナンスが容易で
あり、清掃が容易で異なる色の粉体塗料を用いる塗装を
容易にできる。また、構成部材の摩耗を防止し、圧力空
気等の設備を不要にでき、表面が滑らかで全面が均一な
薄膜塗工が可能になり、粉体塗料の飛散による汚染を防
止でき、電荷付与粉体の無駄をなくせる。EFFECTS OF THE INVENTION According to the present invention, a coating film having a smooth surface and less dust adhesion can be obtained, the maximum ejection amount of the powder coating material is increased, the coating efficiency is increased, and Even if the area is large, it is possible to paint in a short time. Further, the structure is simple, the cost is low, the maintenance is easy, the cleaning is easy, and the coating using the powder paints of different colors can be facilitated. In addition, the wear of the constituent members can be prevented, equipment such as pressurized air can be eliminated, thin film coating with a smooth surface and uniform surface can be performed, contamination due to scattering of powder coating can be prevented, and charge-imparting powder Eliminate waste of body.

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

【図１】本発明の実施形態の静電粉体塗装装置の斜視図FIG. 1 is a perspective view of an electrostatic powder coating device according to an embodiment of the present invention.

【図２】本発明の実施形態の静電粉体塗装装置の構成説
明図FIG. 2 is a structural explanatory view of an electrostatic powder coating device according to an embodiment of the present invention.

【図３】本発明の変形例の静電粉体塗装装置の構成説明
図FIG. 3 is a structural explanatory view of an electrostatic powder coating apparatus according to a modified example of the present invention.

【符号の説明】[Explanation of symbols]

１ 静電粉体塗装装置 ２ 本体 ３ 回収ケース ４ 回収ダクト ５ 電極 ６ 塗装対象面 ７ 回転体 １０ ホッパー １１ スクリューコンベア １２ スリット ３１ フィルター ３４ スクリューコンベア ４１ センサ ４２ コントローラ DESCRIPTION OF SYMBOLS 1 Electrostatic powder coating apparatus 2 Main body 3 Collection case 4 Collection duct 5 Electrode 6 Surface to be coated 7 Rotating body 10 Hopper 11 Screw conveyor 12 Slit 31 Filter 34 Screw conveyor 41 Sensor 42 Controller

Claims (8)

【特許請求の範囲】[Claims] 【請求項１】 粉体塗料と、この粉体塗料との摩擦によ
り発生する静電気により粉体塗料を帯電させることが可
能な電荷付与粉体とを混合し、 その混合した粉体塗料と電荷付与粉体とを、その粉体塗
料と電位差を有する塗装対象面上に流れ落とすことで、
その塗装対象面上に塗膜を形成することを特徴とする静
電粉体塗装方法。1. A powder coating material and a charge-imparting powder capable of charging the powder coating material with static electricity generated by friction with the powder coating material are mixed, and the mixed powder coating material and charge-imparting material are mixed. By dropping the powder on the surface to be coated that has a potential difference with the powder coating,
An electrostatic powder coating method characterized by forming a coating film on the surface to be coated. 【請求項２】 その粉体塗料と同じ極に帯電した電極
を、その塗装対象面に対向して配置することを特徴とす
る請求項１に記載の静電粉体塗装方法。2. The electrostatic powder coating method according to claim 1, wherein an electrode charged to the same pole as the powder coating material is arranged so as to face the surface to be coated. 【請求項３】 その塗装対象面の下方に流れ落ちた電荷
付与粉体を回収し、その回収した電荷付与粉体を粉体塗
料と混合し、その混合した粉体塗料と電荷付与粉体とを
前記塗装対象面上に流れ落とすことを特徴とする請求項
１に記載の静電粉体塗装方法。3. The charge-giving powder that has flowed down below the surface to be coated is collected, the collected charge-giving powder is mixed with powder coating, and the mixed powder coating and charge-giving powder are mixed. The electrostatic powder coating method according to claim 1, wherein the electrostatic powder coating is carried out on the surface to be coated. 【請求項４】 その塗装対象面の下方に粉体塗料と共に
流れ落ちた電荷付与粉体を、その粉体塗料から分離回収
することを特徴とする請求項３に記載の静電粉体塗装方
法。4. The electrostatic powder coating method according to claim 3, wherein the charge-giving powder that has flowed down along with the powder coating below the surface to be coated is separated and collected from the powder coating. 【請求項５】 その粉体塗料と電荷付与粉体との混合比
を検出し、その検出値に応じて粉体塗料の混合量を制御
する請求項１に記載の静電粉体塗装方法。5. The electrostatic powder coating method according to claim 1, wherein a mixing ratio between the powder coating material and the charge-imparting powder is detected, and the mixing amount of the powder coating material is controlled according to the detected value. 【請求項６】 粉体塗料と、この粉体塗料との摩擦によ
り発生する静電気により粉体塗料を帯電させることが可
能な電荷付与粉体とを混合する手段と、 帯電した粉体塗料との電位差を塗装対象面に生じさせる
手段と、 その混合した粉体塗料と電荷付与粉体とを、その塗装対
象面上に流れ落とす手段とを備える静電粉体塗装装置。6. A means for mixing a powder coating material and a charge-imparting powder capable of charging the powder coating material with static electricity generated by friction between the powder coating material and the charged powder coating material. An electrostatic powder coating device comprising means for producing a potential difference on a surface to be coated and means for causing the mixed powder coating material and charge-imparting powder to flow down onto the surface to be coated. 【請求項７】 その粉体塗料の混合量を制御可能な請求
項６に記載の静電粉体塗装装置。7. The electrostatic powder coating apparatus according to claim 6, wherein the mixing amount of the powder coating material can be controlled. 【請求項８】 その塗装対象面と帯電した粉体塗料との
電位差を制御する手段を備える請求項７に記載の静電粉
体塗装装置。8. The electrostatic powder coating apparatus according to claim 7, further comprising means for controlling a potential difference between the surface to be coated and the charged powder coating material.
JP13104296A 1996-04-25 1996-04-25 Method and apparatus for electrostatic powder coating Pending JPH09290183A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13104296A JPH09290183A (en) 1996-04-25 1996-04-25 Method and apparatus for electrostatic powder coating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13104296A JPH09290183A (en) 1996-04-25 1996-04-25 Method and apparatus for electrostatic powder coating

Publications (1)

Publication Number Publication Date
JPH09290183A true JPH09290183A (en) 1997-11-11

Family

ID=15048669

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13104296A Pending JPH09290183A (en) 1996-04-25 1996-04-25 Method and apparatus for electrostatic powder coating

Country Status (1)

Country Link
JP (1) JPH09290183A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003047762A1 (en) * 2001-12-05 2003-06-12 Pergo (Europe) Ab Strewing apparatus
JP2012011340A (en) * 2010-07-02 2012-01-19 Asahi Sunac Corp Powder coating method
WO2019121489A1 (en) * 2017-12-18 2019-06-27 quickcoating GmbH Device and installation for the electrostatic powder coating of objects

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003047762A1 (en) * 2001-12-05 2003-06-12 Pergo (Europe) Ab Strewing apparatus
JP2012011340A (en) * 2010-07-02 2012-01-19 Asahi Sunac Corp Powder coating method
WO2019121489A1 (en) * 2017-12-18 2019-06-27 quickcoating GmbH Device and installation for the electrostatic powder coating of objects
US11311898B2 (en) 2017-12-18 2022-04-26 quickcoating GmbH Device and installation for the electrostatic powder coating of objects

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