JP2005230794A - Small-amount powder supplying device for powder coating - Google Patents

Small-amount powder supplying device for powder coating Download PDF

Info

Publication number
JP2005230794A
JP2005230794A JP2004111874A JP2004111874A JP2005230794A JP 2005230794 A JP2005230794 A JP 2005230794A JP 2004111874 A JP2004111874 A JP 2004111874A JP 2004111874 A JP2004111874 A JP 2004111874A JP 2005230794 A JP2005230794 A JP 2005230794A
Authority
JP
Japan
Prior art keywords
powder
container
powder coating
supply
spray gun
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
JP2004111874A
Other languages
Japanese (ja)
Inventor
Katsuaki Yoshinari
勝明 吉成
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.)
Anest Iwata Corp
Original Assignee
Anest Iwata 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 Anest Iwata Corp filed Critical Anest Iwata Corp
Priority to JP2004111874A priority Critical patent/JP2005230794A/en
Publication of JP2005230794A publication Critical patent/JP2005230794A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Coating Apparatus (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a supplying device which can stably discharge a powder coating material as a relatively simple device applicable to coating of a small amount and is low in cost as against the conventional devices in which the supply of the powder coating material from the supplying device directly affects spraying in powder coating, and therefore, stable supply from the beginning of blowing is requested and is limited only to the facility of a large scale. <P>SOLUTION: This device supports a hopper type powder container by means of a resilient member (a spring) and connects the lower part of a downwardly extended outlet pipe to an inlet of an ejector device via a bent passage in a transverse direction and fixes a vibration generating means (vibrator) which induces vertical vibration to the ejector to vibrate both the container and the ejector. Also, a diagonally cut introducing pipe is disposed within the outlet pipe and the powder in the vibrating container is evenly sent to the ejector so that stable supply is made possible. The air to be supplied to a spray gun is made partly ejectable from the spray gun and the width of supply rate control is improved. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

粉体塗料をスプレーガンで噴霧し、被塗装物に塗着させて塗膜を形成させる粉体塗装の分野において、スプレーガンより均一な粉体塗料を吐出させるための粉体供給装置であって、特に少量の粉体を噴出の初期段階から均一な流動状態で供給するための装置に関する。 In the field of powder coating, in which powder paint is sprayed with a spray gun and applied to an object to form a coating film, this is a powder supply device for discharging a uniform powder paint from a spray gun. In particular, the present invention relates to an apparatus for supplying a small amount of powder in a uniform flow state from the initial stage of ejection.

溶剤を使用し、乾燥によって塗膜を形成する液体塗料による塗装にくらべ、粉体塗装は溶剤を使用しないため、省資源はもとより揮発性有機化合物の排出を防止できることから環境に優しく、また塗膜強度に優れる等の利点がある。さらに被塗装物に塗着しなかった塗料を回収して再使用することが容易で、資源の有効活用にも優れている塗装方法として知られている。 Compared to coating with a liquid paint that uses a solvent and forms a coating film by drying, powder coating does not use a solvent, so it can save resources and prevent the discharge of volatile organic compounds. There are advantages such as excellent strength. Furthermore, it is known as a coating method that can easily collect and reuse a paint that has not been applied to an object to be coated, and is excellent in effective use of resources.

一方各種の粉体塗装方法のうち、スプレーガンによる粉体塗装は汎用性が高く広範囲の被塗装物に対応できる塗装方法で、他の粉体塗装方法に比較して少量の塗装にも適用できることが知られている。しかしながらこの場合であっても粉体を圧縮空気と共にスプレーガンへ流動状態で供給するための粉体供給装置と、被塗装物に向けて噴霧するスプレーガンとして一般的に静電粉体スプレーガンと、噴霧時に被塗装物に付着しなかった粉体塗料を回収して再使用に供する粉体回収装置等の設備が必要とされている。 On the other hand, among various powder coating methods, powder coating with a spray gun is a versatile coating method that can be applied to a wide range of objects to be coated, and can be applied to a small amount of coating compared to other powder coating methods. It has been known. However, even in this case, a powder supply device for supplying powder in a fluidized state together with compressed air to a spray gun, and an electrostatic powder spray gun as a spray gun for spraying toward an object to be coated are generally used. There is a need for equipment such as a powder recovery device that recovers powder paint that has not adhered to the object to be coated during spraying and reuses it.

したがって粉体塗装は比較的大がかりな装置を備え、同一塗料により多量の塗装量を必要とする場合に行われることが経済的理由から一般的で、粉体塗装といえば同じ色の塗料を大量生産する塗装品に限定されるというのが通念であった。したがって従来の設備においては多量に粉体塗料を供給できる装置がほとんどで、少量の被塗装物をわずかな粉体塗料で塗装できる装置として満足できるものはなかった。 Therefore, powder coating is generally carried out when it is equipped with relatively large equipment and requires a large amount of coating with the same paint for economic reasons. Powder coating is the mass production of the same color paint. It was a common belief that it was limited to painted products. Therefore, most of the conventional facilities can supply a large amount of powder paint, and there is no satisfactory apparatus that can apply a small amount of an object to be coated with a small amount of powder paint.

粉体の安定供給の一般的方法としては、均一な流動化をさせた状態の粉体をエジェクタポンプ等により、圧縮空気と共にスプレーガンに供給する方法が実施されている。この場合の流動化は、多孔質板等で形成した粉体塗料容器の底板の下部より圧縮空気を噴出させて流動化状態を得ている。このため供給用のポンプは、流動化状態の粉体中に配置する必要から、少なくともポンプの入り口に流動する粉体塗料が存在するだけの量を残し、安定的な流動状態を容器内に維持することが必要で、粉体を最後まで安定供給しながら使い切ることができる装置ではなかった。 As a general method for stably supplying powder, a method in which powder in a uniform fluidized state is supplied to a spray gun together with compressed air by an ejector pump or the like. In this case, fluidization is achieved by jetting compressed air from the bottom of the bottom plate of the powder coating container formed of a porous plate or the like. For this reason, the supply pump needs to be placed in the fluidized powder, so that at least the amount of powder paint that can flow at the inlet of the pump remains, and a stable fluid state is maintained in the container. It was not a device that could be used up with a stable supply of powder until the end.

流動化の他の方法としては粉体の容器を機械的に振動させ、堆積する粉体を崩し、分散流動化する方法がある。例えば特開2002−80001号等がその技術として見られ、比較的少量の微粉末を均一に排出するために使用されるものである。しかし圧縮空気による方法に比較し不十分であって、少量の粉体をより均一に安定して供給することが要求される場合の粉体塗装に用いる上では多くの問題が残されている。 As another method of fluidization, there is a method in which a powder container is mechanically vibrated to break up powder to be deposited and dispersed and fluidized. For example, Japanese Patent Application Laid-Open No. 2002-80001 is seen as the technology, and is used for uniformly discharging a relatively small amount of fine powder. However, this method is insufficient as compared with the method using compressed air, and many problems remain when used for powder coating when it is required to supply a small amount of powder more uniformly and stably.

またカメラ、携帯電話、ノートパソコン、オーディオビジュアル機器等の精密部品等に使用する粉体塗料は、薄い膜厚が要求されることにより、微粉末の塗料が使用され、これらの粉体塗料は微振動を与えても崩れにくく分散しにくい傾向がある。このため手軽に使用できる少塗付量の塗装分野で使用できる粉体供給装置が望まれている。
特開2002−80001号
In addition, powder coatings used for precision parts such as cameras, mobile phones, notebook computers, audiovisual equipment, etc., are required to have a thin film thickness, so fine powder coatings are used. There is a tendency that even if vibration is applied, it is difficult to collapse and disperse. For this reason, there is a demand for a powder supply apparatus that can be used easily and can be used in the field of coating with a small coating amount.
JP 2002-80001 A

粉体塗装では供給装置からの粉体塗料供給が噴霧に直接影響するため、安定供給が要求され、特に少量の粉体で行う場合は吹き始めから安定して吐出できることが重要である。従来の粉体塗装設備は比較的大規模の設備に限られており、本発明は少量の粉体でも塗装が可能である、経済的で簡易的な装置を提供することを課題とする。特に少量の吐出量で行う粉体塗装においても吹き始めから安定した供給を可能として、効率的に品質の高い作業を行うことができる装置を提供することである。 In powder coating, the supply of powder paint from the supply device directly affects spraying, so that stable supply is required. In particular, when performing with a small amount of powder, it is important to be able to discharge stably from the beginning of spraying. Conventional powder coating equipment is limited to relatively large scale equipment, and an object of the present invention is to provide an economical and simple apparatus capable of coating even a small amount of powder. In particular, an object of the present invention is to provide an apparatus capable of performing high-quality work efficiently by enabling stable supply from the start of spraying even in powder coating performed with a small discharge amount.

上記の課題を達成するために、本発明は、下部に粉体供給口を有するホッパー形粉体容器とその供給口に面して粉体入口を配したエジェクタポンプを備えた粉体供給装置において、ホッパー式粉体容器を弾発部材(ばね等)により浮動状態で支え、粉体供給口の下方に延出させた出口管の下部に横方向への曲がり通路を設け、この曲がり通路を介して前記エジェクタ装置の入り口に接続すると共に、このエジェクタ装置に上下振動を誘起する振動発生手段(バイブレータ)を固定した。 In order to achieve the above object, the present invention provides a powder supply apparatus including a hopper type powder container having a powder supply port at a lower portion and an ejector pump having a powder inlet facing the supply port. The hopper type powder container is supported in a floating state by a resilient member (spring etc.), and a laterally bent passage is provided at the lower part of the outlet pipe extending below the powder supply port. In addition to being connected to the entrance of the ejector device, vibration generating means (vibrator) for inducing vertical vibration was fixed to the ejector device.

また出口管内には、粉体容器側の開口端を斜めに切断した導入管を配置した。導入管は粉体の供給量によって内径が選択できるように差込によって容易に交換できるようにし、樹脂製のパイプが選択される。導入管とこれに接続される曲がり管及びエジェクタポンプは必要に応じて複数が設けられ、それぞれ共通の振動発生手段で振動させられる容器より別々の搬送路に供給が行われる。 In addition, an introduction pipe in which the opening end on the powder container side was cut obliquely was arranged in the outlet pipe. The introduction pipe can be easily replaced by insertion so that the inner diameter can be selected according to the amount of powder supplied, and a resin pipe is selected. A plurality of introduction pipes, bent pipes connected to the introduction pipe, and ejector pumps are provided as necessary, and each is supplied to separate conveyance paths from containers that are vibrated by a common vibration generating means.

さらに振動発生手段と一体化された粉体容器は、下部を基台に固定された円筒ばねで支持し、容器が振動するよう、容器外周の少なくとも一部を可動自在に支持して全体的に振動する構成とする。この振動は上下振動と回転振動を有するため容器内で粉体塗料は常に上下回転しながら流動するため粉体の堆積、詰まりが生じない。また容器内には出口管上部を遮り周囲より粉体が流入する穴を設けた安定濾過板を配置している。 Further, the powder container integrated with the vibration generating means is supported by a cylindrical spring fixed to the base at the lower part, and at least a part of the outer periphery of the container is movably supported so that the container vibrates. It is configured to vibrate. Since this vibration has a vertical vibration and a rotational vibration, the powder coating always flows in the container while rotating up and down, so that no powder is deposited or clogged. In addition, a stable filter plate is provided in the container. The stable filter plate is provided with a hole for blocking the upper part of the outlet pipe and allowing powder to flow in from the periphery.

振動発生手段は、エア駆動式のバイブレータとしてエジェクタポンプと共に粉体スプレーガンの作動と連動して作動させる。 The vibration generating means is operated in conjunction with the operation of the powder spray gun together with the ejector pump as an air driven vibrator.

また粉体の少量供給を行ってスプレーガンより噴出させる実用的な装置として安定供給を図る手段として、バイブレータに取り付けられて共に振動するエジェクタポンプに導入する供給エア回路に、圧力調整弁を設けて前記エジェクタポンプに接続すると共に、その圧力調整弁の出口側の一部より供給エアを分岐してスプレーガンに接続し、スプレーガンに取り付けた開閉弁もしくは調節弁を介して供給エアの一部を噴出させることによって、実質的にエジェクタポンプに導入されるエアを調節し、その結果粉体供給量を調節可能とすることができる。 In addition, as a means to ensure a stable supply as a practical device for supplying a small amount of powder and ejecting from a spray gun, a pressure adjustment valve is provided in a supply air circuit that is attached to a vibrator and introduced into an ejector pump that vibrates together. Connected to the ejector pump, branched supply air from a part on the outlet side of the pressure control valve, connected to the spray gun, and part of the supply air was connected via an on-off valve or a control valve attached to the spray gun. By ejecting, the air introduced into the ejector pump can be substantially adjusted, and as a result, the powder supply amount can be adjusted.

スプレーガンに接続した供給エアの一部は、スプレーガンの噴霧口の近傍に噴出口を設けて、噴出させることによって、機能の向上に活用することが可能となる。 A part of the supply air connected to the spray gun can be used for improving the function by providing a jet outlet in the vicinity of the spray port of the spray gun and ejecting it.

以上の構成により本発明によれば、振動発生手段によって流動化した粉体をエジェクタポンプで供給する際、曲がり通路によってエジェクタポンプ作動初期に出やすい粉体の吹き上げが防止され、少吐出量の場合であっても初期の安定供給が可能となり吹き始めより無駄なく塗装が可能となる。したがって塗装作業性からも効率を向上させることができる。 With the above configuration, according to the present invention, when the powder fluidized by the vibration generating means is supplied by the ejector pump, the curved passage prevents the powder from being easily discharged at the initial stage of operation of the ejector pump, and the discharge amount is small. Even so, the initial stable supply becomes possible, and painting can be performed without waste from the beginning of blowing. Therefore, efficiency can be improved also from the painting workability.

また容器より出口管に供給される粉体は導入管端部を斜めにしたことで流動化した粉体が安定して導入管内に送り込まれエジェクタポンプに供給され、より安定した供給が可能となる。導入管の通路内径は粉体の供給量によって適切な大きさが選定されるため、必要に応じて交換が可能で、着脱が容易であり、色替え時等の清掃も容易に行うことができる。 In addition, the powder supplied from the container to the outlet pipe is slanted at the end of the introduction pipe, so that the fluidized powder is stably fed into the introduction pipe and supplied to the ejector pump, enabling more stable supply. . Since the inner diameter of the passage of the introduction pipe is selected according to the amount of powder supplied, it can be replaced as needed, can be easily attached and detached, and can be easily cleaned when changing colors. .

さらに粉体容器側は底部の出口管上部に直接粉体が落ち込まないようにした安定濾過板を配置することでホッパー内中央にできる巣穴を防止して常時安定供給を図れ、エジェクタポンプに粉体を送り込むことができ、従来困難であった少容量、少吐出量の粉体塗装において安定供給が可能な供給装置が可能となる等、近年の精密機器に使用される微粉末の粉体塗料においても簡単な装置で手軽に使用できる効果が得られる。 In addition, a stable filter plate that prevents powder from dropping directly into the top of the outlet pipe on the bottom side of the powder container side prevents the burrow formed in the center of the hopper and ensures a stable supply at all times. Fine powder powder coatings used in precision equipment in recent years, such as a supply device that can feed the body and can stably supply powder coating with a small volume and a small discharge amount, which has been difficult in the past. However, it is possible to obtain an effect that can be easily used with a simple device.

本発明の利用範囲では少量吐出の効率を上げるために複数のスプレーガンを使用することもしばしば行われるが、1つの容器にエジェクタポンプを含む導入管を複数設けることで費用をかけずに簡単に応用が可能となる。 In the range of use of the present invention, a plurality of spray guns are often used in order to increase the efficiency of small-volume discharge. However, by providing a plurality of introduction pipes including ejector pumps in one container, it is easy and inexpensive. Application becomes possible.

さらに本願の他の発明によれば、エジェクタポンプに導入する供給エアは、その一部を分岐させてスプレーガンより噴出させることによってポンプの供給量を減少させ、より少吐出量を可能とし、噴霧作動中に噴霧量の調節を手元で直ちにでき、複雑な塗装に対してきめ細かな対応が可能となって粉体塗料の効率的な使用が可能となる。また分岐したエアは噴出する粉体のスプレーパターンを調整するなどの二次的な効果を得ることができる等の効果が得られる。 Furthermore, according to another invention of the present application, the supply air to be introduced into the ejector pump is partly branched and ejected from the spray gun, thereby reducing the pump supply amount and enabling a smaller discharge amount. During operation, the amount of spray can be adjusted immediately at hand, making it possible to deal with complex paintings in detail and enabling the efficient use of powder coatings. In addition, the branched air can provide secondary effects such as adjusting the spray pattern of the sprayed powder.

以上のとおり、本発明によれば粉体スプレーガンの作動によりエジェクタポンプに送られた作動空気によって圧縮空気と共に粉体スプレーガンに粉体が供給され、ホッパー式のために大がかりな装置を必要とせず、わずかな粉体塗料でも最後まで無駄なく使用でき、少量でも粉体塗装が可能になり、大量塗装でなければ粉体塗装はできないと言う従来の欠点を改善することができた。このことはテスト的に塗装を行い確認する場合にも大きな効果が得られ、粉体塗装移行への機会が増加し、環境、資源的に大きな効果が望める粉体塗装の拡大を図る上で大いに貢献できるものである。 As described above, according to the present invention, the powder is supplied to the powder spray gun together with the compressed air by the working air sent to the ejector pump by the operation of the powder spray gun, and a large-scale apparatus is required for the hopper type. In addition, even a small amount of powder paint can be used without waste to the end, powder coating is possible even with a small amount, and the conventional drawback that powder coating can only be achieved in large quantities can be improved. This is also a great effect in the case of painting and confirming on a test basis, increasing the opportunity to move to powder coating, and greatly expanding powder coating that can be expected to have significant environmental and resource effects. It can contribute.

以下、本発明の実施態様を図面により詳細に説明する。図1は本発明を実施するための構成を示し、フレーム1は、粉体容器2、エジェクタポンプ3を取扱易くまとめて構成するもので、必要によって下部に車輪等が設けられる。この場合粉体容器2は振動するため、移動防止の手段が施される。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a configuration for carrying out the present invention, and a frame 1 is configured so that a powder container 2 and an ejector pump 3 are easily handled, and a wheel or the like is provided at a lower portion as necessary. In this case, since the powder container 2 vibrates, a means for preventing movement is applied.

粉体容器2は下方を漏斗状に形成し、下端を開口させたホッパー式で、5リットルの容量を持っている。下端には出口管4がねじ込まれ、その他端には90°で横方向に通路を変える曲がり通路5を介してエジェクタポンプ3が取り付けられている。エジェクタポンプ3は圧縮空気の噴射により吸引され圧縮空気と共に吸引した粉体を供給するもので、前記曲がり通路5がエジェクタポンプ3の吸込口に連通している。エジェクタポンプ3の出口は供給ホース6を介して粉体スプレーガンに接続されている。 The powder container 2 is a hopper type in which the lower part is formed in a funnel shape and the lower end is opened, and has a capacity of 5 liters. An outlet pipe 4 is screwed into the lower end, and an ejector pump 3 is attached to the other end through a bent passage 5 that changes the passage in the lateral direction at 90 °. The ejector pump 3 supplies powder sucked by the compressed air and sucked together with the compressed air, and the bent passage 5 communicates with the suction port of the ejector pump 3. The outlet of the ejector pump 3 is connected to a powder spray gun via a supply hose 6.

エジェクタポンプ3は、各種気体、液体、粒状体の吸引・吐出に用いられる周知の構造をしており、供給作動用エア口7、補助エア口8が設けられ、それぞれに圧縮空気のエアホース9が接続されている。供給作動用エア口7からの噴射空気で吸引された粉体塗料は吐出口6Aより吐出され、供給ホース6によって圧縮空気との混合流として粉体塗装用スプレーガン21に送られる。補助エア口8からの空気は粉体塗料の安定搬送、空気量とのバランス調整に用いられる。 The ejector pump 3 has a well-known structure used for suction and discharge of various gases, liquids, and granular materials. The ejector pump 3 is provided with a supply operation air port 7 and an auxiliary air port 8, each of which has an air hose 9 for compressed air. It is connected. The powder paint sucked by the jet air from the supply operation air port 7 is discharged from the discharge port 6A and sent to the powder coating spray gun 21 by the supply hose 6 as a mixed flow with the compressed air. The air from the auxiliary air port 8 is used for stable conveyance of the powder coating material and balance adjustment with the amount of air.

粉体容器2は底部にばね12による弾性体によって支持し、フレーム1の基台10に揺動可能に保持されている。粉体容器2の下部開口に接続された出口管4は基台10の保持部23を貫通して下部に曲がり通路5が一体で取り付けられている。保持部23は粉体容器2とエジェクタポンプ3をつなぐ出口管4が少なくとも上下に抵抗なく振動するように緩衝部材24を介在させて若干の隙間を持たせている。 The powder container 2 is supported at the bottom by an elastic body by a spring 12 and is held swingably on the base 10 of the frame 1. The outlet pipe 4 connected to the lower opening of the powder container 2 penetrates the holding portion 23 of the base 10 and is bent and attached to the lower portion with the passage 5 integrally. The holding part 23 has a slight gap with a buffer member 24 interposed so that the outlet pipe 4 connecting the powder container 2 and the ejector pump 3 vibrates at least vertically without resistance.

曲がり通路5の下部にはエア駆動式のバイブレータ25が振動発生手段として固定されている。バイブレータ25は水平方向に回転軸を持たせた偏心ロータを内蔵し、回転によって垂直面の振動を発生する。即ち振動発生手段による上下を含む振動は、エジェクタポンプ3のみならず一体の粉体容器も振動させる。このため粉体容器2の上部にはフレーム1に取り付けられた保持バンド22で遥動できる範囲を維持して安定的に保持されている。保持バンド22は全体を押さえても、容器が倒れないように一部を保持する方法でも良い。 An air-driven vibrator 25 is fixed to the lower portion of the bending passage 5 as vibration generating means. The vibrator 25 incorporates an eccentric rotor having a rotation axis in the horizontal direction, and generates vibration on the vertical plane by rotation. That is, the vibration including the top and bottom by the vibration generating means vibrates not only the ejector pump 3 but also the integral powder container. For this reason, the upper part of the powder container 2 is stably held while maintaining a range in which it can be swung by the holding band 22 attached to the frame 1. Even if the holding band 22 is pressed down entirely, a method of holding a part so that the container does not fall down may be used.

また容器の内部は出口管4の開口端部より少し離れた位置に第3図に示すように中央を遮蔽し、周囲に多数の穴29を設けた安定濾過板26が止め輪27によって水平に取り付けられている。中央部の出口管4には導入パイプ28が差し込まれ、出口管4の端部にその先端を突出させている。導入パイプ28の先端30は、斜めに切断され上下方向即ち流入方向に幅を持たせた範囲で粉体が導入パイプ28に入り込むように構成されている。31は粉体容器の蓋を示す。 Further, as shown in FIG. 3, the inside of the container is shielded at a position slightly apart from the opening end of the outlet pipe 4, and a stable filter plate 26 provided with a large number of holes 29 around it is horizontally placed by a retaining ring 27. It is attached. An introduction pipe 28 is inserted into the outlet pipe 4 in the center, and the tip of the inlet pipe 4 protrudes from the end of the outlet pipe 4. The tip 30 of the introduction pipe 28 is configured such that the powder enters the introduction pipe 28 in a range that is cut obliquely and has a width in the vertical direction, that is, the inflow direction. Reference numeral 31 denotes a powder container lid.

図4に示す例は他の実施例で、粉体容器2の出口管4内には2つの導入パイプ28A、28Bが設けられ、それぞれが曲がり通路5A,5B及びエジェクタポンプ3A、3Bと接続されて、図示を省略しているが、2つの供給通路に粉体を供給するように構成されている。2つの導入パイプ28A、28Bの先端は、前述と同様斜めに切断された開口部が背中合わせに設置され,互いの粉体導入が干渉されることなく、上下方向即ち流入方向に幅を持たせた範囲で導入パイプ28A、28Bに入り込むように構成されている。 The example shown in FIG. 4 is another embodiment, and two introduction pipes 28A and 28B are provided in the outlet pipe 4 of the powder container 2, and are connected to the bent passages 5A and 5B and the ejector pumps 3A and 3B, respectively. Although not shown, the powder is supplied to the two supply passages. At the tips of the two introduction pipes 28A and 28B, openings cut obliquely as described above are installed back to back, and the width is increased in the vertical direction, that is, the inflow direction without interfering with each other's powder introduction. It is configured to enter the introduction pipes 28A and 28B within a range.

図5は、スプレーガンを接続した時の全体の構成を示したものである。粉体をスプレーガンに供給するエアとバイブレータを作動させるエアは、エア源50から圧力調整弁51を経てエジェクタポンプに送られる。一方圧力調整弁51の出口エアは分岐通路52によりスプレーガンに接続されている。圧力調整弁は実質的に供給エア量を調節することになり、流量調節弁を用いても本発明の要求する機能は得られる。 FIG. 5 shows the overall configuration when the spray gun is connected. Air for supplying the powder to the spray gun and air for operating the vibrator are sent from the air source 50 to the ejector pump via the pressure adjustment valve 51. On the other hand, the outlet air of the pressure regulating valve 51 is connected to the spray gun by a branch passage 52. The pressure regulating valve substantially regulates the supply air amount, and the function required by the present invention can be obtained even if the flow regulating valve is used.

エア源からのエアはスプレーガンの作動に連動するコントローラ55によって、エジェクタポンプを作動させる供給エアと、粉体の搬送を制御する搬送エアとが供給され、前記バイブレータの作動エアの供給を含めて制御が行われる。静電塗装の場合はスプレーガンへの荷電制御も同時にコントローラで行われる。 The air from the air source is supplied with supply air for operating the ejector pump and conveyance air for controlling the conveyance of the powder by the controller 55 interlocked with the operation of the spray gun, including the supply of the operation air for the vibrator. Control is performed. In the case of electrostatic coating, the charge control to the spray gun is also performed by the controller at the same time.

供給粉体を噴霧するスプレーガンには、調節弁53が設けられ、開閉により調節されたエアがスプレーガンを通して噴出されるよう構成される。調節弁53は図のようにスプレーガン直前に絞り弁を取り付けることでも、引き金と連動して開閉できる空気弁をスプレーガンに内蔵する構成を採用しても良い。 The spray gun for spraying the supplied powder is provided with a control valve 53 so that air adjusted by opening and closing is ejected through the spray gun. As shown in the figure, the control valve 53 may be provided with a throttle valve immediately before the spray gun, or may adopt a configuration in which an air valve that can be opened and closed in conjunction with a trigger is built in the spray gun.

調節弁53を通過したエアは粉体が噴出する噴霧口の周囲に調整エア口を配置して、そこから噴出させる空気によって噴霧パターンの形状をコントロールすることができる。即ち粉体の広がりを矯正することで、変化する被塗装物の形状に合った効率的な塗装を行うことができる。また粉体塗装で多く使用される静電塗装の荷電電極に付着して性能を低下させる粉体を、定期的に除去するためのエアとして噴出口を配置することも可能となる等、機能の向上に役立たせることができる。 The air that has passed through the control valve 53 can be controlled by controlling the shape of the spray pattern by arranging an adjustment air port around the spray port from which powder is ejected. In other words, by correcting the spread of the powder, it is possible to perform efficient coating that matches the shape of the object to be changed. In addition, it is possible to arrange a jet outlet as air for periodically removing powder that adheres to the charged electrode of electrostatic coating often used in powder coating and degrades performance. It can be useful for improvement.

以上の構成で粉体塗装を行うにあたり、粉体を供給する場合には、粉体容器2内に粉体塗料を入れ、粉体スプレーガン21を操作して各エアを供給する。通常はスプレーガンの作動に伴ってスイッチを開閉し、電磁弁によって供給エアを供給・停止する方法が用いられる。吹き付けを開始するとそれぞれのホースにエアが送られ、バイブレータ25が振動してエジェクタポンプ、粉体容器が振動し内部の粉体が流動化する。 In supplying powder with the above configuration, when supplying powder, a powder coating material is placed in the powder container 2 and each air is supplied by operating the powder spray gun 21. Usually, a method is used in which the switch is opened and closed in accordance with the operation of the spray gun, and supply air is supplied and stopped by an electromagnetic valve. When spraying is started, air is sent to each hose, the vibrator 25 vibrates, the ejector pump and the powder container vibrate, and the internal powder fluidizes.

一方補助エアと作動エアは供給ホース6を通り粉体スプレーガン21より噴出する。このとき作動エアにより吸引された粉体が混合気流として分散された状態で噴霧される。導入パイプ28を通して入り込んでいたエジェクタポンプ3内の粉体は、直接振動を受けて流動化し、送り込まれたエアによって均一な分散状態で粉体スプレーガンより噴出する。また曲がり通路5によって一気に粉体が落ち込むことなく、しかも作動の始めにエアによって容器側に吹き上げることもなく安定した供給が吹き始めより可能となる。 On the other hand, the auxiliary air and the working air are ejected from the powder spray gun 21 through the supply hose 6. At this time, the powder sucked by the working air is sprayed in a dispersed state as a mixed air flow. The powder in the ejector pump 3 that has entered through the introduction pipe 28 is directly subjected to vibration and fluidized, and is ejected from the powder spray gun in a uniform dispersed state by the fed air. Further, the bent passage 5 does not cause the powder to fall at once, and the air can be stably supplied at the beginning of the operation without being blown up to the container side by the air.

また流動化する容器内の粉体中に開口端を斜めに切断した導入パイプ28を突き出しているため、導入パイプ28中に進入する粉体が平均化すると共に、その上部に設けた安定濾過板26によって真上からの粉体の落ち込みが解消され、吸込み部の真上にできる、いわゆる巣穴が発生することなく常時安定した供給を可能とする。即ち粉体は振動による流動状態で安定濾過板26の周辺部分から下方に移動し中央の導入パイプ28に向かうため平均した流れとなり、中央部の粉体のみが供給され集中して導入パイプ28に落ち込むことがない。 Further, since the introduction pipe 28 whose opening end is obliquely cut is protruded into the powder in the fluidized container, the powder entering the introduction pipe 28 is averaged and the stable filter plate provided on the upper part thereof. 26 eliminates the drop of the powder from directly above, and enables a stable supply at all times without generating a so-called burrow that can be formed directly above the suction portion. In other words, the powder flows in a flow state due to vibration and moves downward from the peripheral portion of the stable filter plate 26 toward the central introduction pipe 28, so that the average flow is obtained, and only the central powder is supplied and concentrated to the introduction pipe 28. There is no depression.

粉体の供給はエアを停止すると停止し、粉体スプレーガン21からの噴出が停止するが、バイブレータ25は慣性により振動を弱めながら遅れて停止、粉体の溜りができないように働く。このとき供給ホース内の粉体スプレーガン21に近い位置の粉体は排出され、もしくはわずかになり、次の作動時における吹き始めの粉体噴出を安定させることになる。 The supply of powder stops when the air is stopped, and the ejection from the powder spray gun 21 stops. However, the vibrator 25 stops with a delay while weakening the vibration due to inertia and prevents the powder from accumulating. At this time, the powder in the position close to the powder spray gun 21 in the supply hose is discharged or becomes a little, so that the powder blowing at the start of the next operation is stabilized.

図5の別の形態では、スプレーガンの作動に連動するコントローラ55によって圧力調整弁51を通過したエアは、エジェクタポンプに供給されて前述したように粉体供給に用いられると共に、分岐通路52を経て粉体スプレーガン21に取り付けられた調節弁53によって噴霧パターン調整用又は付着粉体の清掃用等として噴出をすることができる構成になっている。このため調整弁53からエアを噴出するとエジェクタポンプに送り込まれるエアが減少し、エジェクタポンプからの粉体供給量が減少する。したがってコントローラを調節しなくても粉体スプレーガンの手元で調節弁53を開閉流量制御することで粉体の供給量を調節して、噴霧量を制御できることになる。 In another form of FIG. 5, the air that has passed through the pressure regulating valve 51 by the controller 55 that is interlocked with the operation of the spray gun is supplied to the ejector pump and used for powder supply as described above. After that, the control valve 53 attached to the powder spray gun 21 can be ejected for adjusting the spray pattern or cleaning the adhered powder. For this reason, when air is ejected from the regulating valve 53, the air sent to the ejector pump is reduced, and the amount of powder supplied from the ejector pump is reduced. Therefore, even if the controller is not adjusted, the amount of powder supplied can be adjusted by controlling the opening / closing flow rate of the control valve 53 by the hand of the powder spray gun, thereby controlling the spray amount.

噴霧量の制御は、被塗装物の大きさ形状により、吹き付け塗面に応じて要求される効率的な噴霧につながり、作業性,仕上がりの向上を図ることができる。しかもその切り替え調節を、操作者が粉体スプレーガンの手元で直ちに行うことができ効率的である。 Control of the amount of spraying leads to efficient spraying required according to the spray coating surface, depending on the size and shape of the object to be coated, and can improve workability and finish. Moreover, the switching adjustment is efficient because the operator can immediately perform the adjustment at the hand of the powder spray gun.

図1の装置により実施した粉体供給の例を具体的に示すと、実際に粉体塗装において要求される膜厚を25〜50マイクロメータとすると、噴出量は20〜50グラム毎分程度となるため、導入パイプの内径を4mmと8mmで行った。供給量はエジェクタポンプの仕様によって異なるが実施例では、作動エア圧25キロパスカルから100キロパスカルの範囲で、10から80グラム毎分程度の噴出量のものが使用された。この場合の30〜40グラム毎分程度では4mmの方が安定性に優れていた。しかし供給量が多くなると細いパイプではつまりの発生する可能性が出てくるため、供給量の増加にしたがって太くすることが望ましい。
実施例によれば毎分30〜40グラムの少吐出量においても、3%程度の誤差範囲で維持され、塗膜厚の許容範囲を十分に満足することができた。
Specifically, an example of powder supply performed by the apparatus of FIG. 1 is as follows. When the film thickness actually required in powder coating is 25 to 50 micrometers, the ejection amount is about 20 to 50 grams per minute. Therefore, the inner diameter of the introduction pipe was 4 mm and 8 mm. Although the supply amount differs depending on the specifications of the ejector pump, in the examples, the range of the working air pressure from 25 kilopascals to 100 kilopascals and the ejection amount of about 10 to 80 grams per minute were used. In this case, 4 mm was superior in stability at about 30 to 40 grams per minute. However, as the supply amount increases, there is a possibility that clogging may occur in a thin pipe.
According to the example, even with a small discharge amount of 30 to 40 grams per minute, the error range of about 3% was maintained, and the allowable range of the coating thickness could be sufficiently satisfied.

さらに図5の実施例により作動エアの一部を粉体スプレーガンよりパターン調節用に噴出させた場合、エジェクタの供給圧力が低下し、これに伴って供給量が20%減少、パターン(噴霧幅)の縮少にあった噴出量として適正な調節をすることができることがわかった。調節範囲は作動エアとのバランスで選択することが可能で、調節弁と噴出口の設定によって変えることができる。
Furthermore, when a part of the working air is ejected from the powder spray gun for pattern adjustment according to the embodiment of FIG. 5, the supply pressure of the ejector decreases, and the supply amount decreases by 20%, and the pattern (spray width) It was found that appropriate adjustment can be made as the amount of ejection corresponding to the reduction of The adjustment range can be selected according to the balance with the working air, and can be changed depending on the setting of the adjustment valve and the jet outlet.

本発明の一実施例を示す構成図である。It is a block diagram which shows one Example of this invention. 図1の要部を示す部分拡大図である。It is the elements on larger scale which show the principal part of FIG. 安定濾過板の平面図である。It is a top view of a stable filter plate. 粉体供給装置を複数配置した場合の実施例を示す構成図である。It is a block diagram which shows the Example at the time of arrange | positioning multiple powder supply apparatuses. 供給エアを分岐して噴出させるようにした本発明の他の実施構成図である。It is the other implementation block diagram of this invention which branched and supplied the supply air.

符号の説明Explanation of symbols

1 フレーム
2 粉体容器
3、3A、3B エジェクタポンプ
4 出口管
5、5A、5B 曲がり通路
6 供給ホース
6A 吐出口
7 供給作動用エア口
8 補助エア口
9 エアホース
10 基台
12 ばね
21 粉体スプレーガン
24 緩衝部材
25 バイブレータ
26 安定濾過板
28、28A、28B 導入パイプ
30 先端
50 エア源
51 圧力調整弁
53 調節弁
52 分岐通路
55 コントローラ
1 Frame 2 Powder container 3, 3A, 3B Ejector pump 4 Outlet pipe 5, 5A, 5B Curved passage 6 Supply hose 6A Discharge port 7 Supply operation air port 8 Auxiliary air port 9 Air hose 10 Base 12 Spring 21 Powder spray Gun 24 Buffer member 25 Vibrator 26 Stable filter plates 28, 28 </ b> A, 28 </ b> B Introduction pipe 30 Tip 50 Air source 51 Pressure adjustment valve 53 Control valve 52 Branch passage 55 Controller

Claims (8)

ホッパー形粉体容器を弾発部材で支え、該粉体容器の下部に出口管を配してその下端を横に変位させた曲がり通路とし、該曲がり通路の先に圧縮空気流による負圧により吸引するエジェクタポンプの吸込み口を接続すると共に、上下振動を誘起する振動発生手段を前記出口管及び前記エジェクタポンプの下方に一体に取り付けてなる粉体塗装用少量粉体供給装置。 A hopper type powder container is supported by a resilient member, and an outlet pipe is arranged at the lower part of the powder container to form a bent passage whose lower end is displaced laterally. By the negative pressure due to the compressed air flow at the end of the bent passage A small amount powder supply apparatus for powder coating in which a suction port of a suction ejector pump is connected and vibration generating means for inducing vertical vibration is integrally attached below the outlet pipe and the ejector pump. 出口管内に容器側上部先端を斜めに切断した導入管を交換可能に配置した請求項1の粉体塗装用少量粉体供給装置。 The small amount powder supply apparatus for powder coating according to claim 1, wherein an introduction pipe having a container-side upper end cut obliquely is disposed in the outlet pipe so as to be replaceable. 粉体容器下部を基台に固定された円筒ばねで支持し、容器外周の少なくとも一部を可動自在に支持した請求項1の粉体塗装用少量粉体供給装置。 2. A small quantity powder supply apparatus for powder coating according to claim 1, wherein the lower part of the powder container is supported by a cylindrical spring fixed to the base, and at least a part of the outer periphery of the container is movably supported. 粉体容器内の出口管開口部に面して、出口管を遮蔽し、周囲に通過穴を多数設けた安定濾過板を前期容器に着脱自在に取り付けた請求項1の粉体塗装用少量粉体供給装置。 2. A small amount of powder coating powder for powder coating according to claim 1, wherein a stable filter plate, which faces the outlet pipe opening in the powder container, shields the outlet pipe, and has many passage holes around it, is detachably attached to the previous container. Body supply device. 振動発生手段はエア駆動式とし、エジェクタポンプと共に粉体ガンの作動と同時に作動する請求項1の粉体塗装用少量粉体供給装置。 2. The small quantity powder supply apparatus for powder coating according to claim 1, wherein the vibration generating means is air driven and operates simultaneously with the operation of the powder gun together with the ejector pump. 1つの粉体容器に、導入管とこれに接続して下部に設けられる曲がり通路とエジェクタポンプを複数併設した請求項2の粉体塗装用少量粉体供給装置。 3. A small amount powder supply apparatus for powder coating according to claim 2, wherein a plurality of bent pipes and ejector pumps provided in the lower part in connection with the introduction pipe are provided in one powder container. 振動発生手段に取り付けられて共に振動するエジェクタポンプに導入する供給エア回路に圧力調整弁を設けて前記エジェクタポンプに接続すると共に、前記圧力調節弁の出口側の一部を分岐してスプレーガンに接続し、スプレーガンに取り付けた開閉弁を介して前記供給エアの一部を噴出させてなる粉体塗装用少量粉体供給装置。 A pressure adjustment valve is provided in the supply air circuit that is attached to the vibration generating means and introduced into the ejector pump that vibrates together, and is connected to the ejector pump, and a part of the outlet side of the pressure adjustment valve is branched to the spray gun. A small amount powder supply device for powder coating, which is connected and ejects a part of the supply air through an on-off valve attached to a spray gun. 供給エアの一部は、スプレーガンの噴霧口の近傍に噴出口を設けて、噴出させてなる請求項7の粉体塗装用少量粉体供給装置
The small amount powder supply apparatus for powder coating according to claim 7, wherein a part of the supply air is jetted by providing a jet outlet in the vicinity of the spray port of the spray gun.
JP2004111874A 2004-01-23 2004-04-06 Small-amount powder supplying device for powder coating Pending JP2005230794A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004111874A JP2005230794A (en) 2004-01-23 2004-04-06 Small-amount powder supplying device for powder coating

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004015558 2004-01-23
JP2004111874A JP2005230794A (en) 2004-01-23 2004-04-06 Small-amount powder supplying device for powder coating

Publications (1)

Publication Number Publication Date
JP2005230794A true JP2005230794A (en) 2005-09-02

Family

ID=35014290

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2004111874A Pending JP2005230794A (en) 2004-01-23 2004-04-06 Small-amount powder supplying device for powder coating

Country Status (1)

Country Link
JP (1) JP2005230794A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007249150A (en) * 2006-02-16 2007-09-27 Ricoh Co Ltd Fine particle supply device and image forming apparatus
CN104117472A (en) * 2014-07-25 2014-10-29 秦光仲 Pneumatic electric sterilization powder blower
CN107470084A (en) * 2016-12-31 2017-12-15 江苏康友医用器械有限公司 A kind of uniform coating unit of cyclohexanone adhesive asserably volatilization prevention
WO2022055050A1 (en) * 2020-09-11 2022-03-17 주식회사 테라시온 바이오메디칼 Medical powder spraying device with easy adjustment of flow rate of powder being sprayed, and operating method for powder spraying device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49333Y1 (en) * 1970-09-18 1974-01-08
JPS5041285A (en) * 1973-08-21 1975-04-15
JPH01159045A (en) * 1987-12-17 1989-06-22 Onoda Cement Co Ltd Apparatus for fluidization of powder
JPH11216417A (en) * 1998-01-29 1999-08-10 Rid Kk Powder treating device and powder treating method
JP2000198539A (en) * 1998-08-21 2000-07-18 Rc Shokai Kk Pneumatic feeder for hotmelt adhesive pellet
JP2002035646A (en) * 2000-07-28 2002-02-05 Mikasa Paint Kk Pile applying method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS49333Y1 (en) * 1970-09-18 1974-01-08
JPS5041285A (en) * 1973-08-21 1975-04-15
JPH01159045A (en) * 1987-12-17 1989-06-22 Onoda Cement Co Ltd Apparatus for fluidization of powder
JPH11216417A (en) * 1998-01-29 1999-08-10 Rid Kk Powder treating device and powder treating method
JP2000198539A (en) * 1998-08-21 2000-07-18 Rc Shokai Kk Pneumatic feeder for hotmelt adhesive pellet
JP2002035646A (en) * 2000-07-28 2002-02-05 Mikasa Paint Kk Pile applying method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007249150A (en) * 2006-02-16 2007-09-27 Ricoh Co Ltd Fine particle supply device and image forming apparatus
JP4743618B2 (en) * 2006-02-16 2011-08-10 株式会社リコー Powder supply apparatus and image forming apparatus
CN104117472A (en) * 2014-07-25 2014-10-29 秦光仲 Pneumatic electric sterilization powder blower
CN107470084A (en) * 2016-12-31 2017-12-15 江苏康友医用器械有限公司 A kind of uniform coating unit of cyclohexanone adhesive asserably volatilization prevention
CN107470084B (en) * 2016-12-31 2024-05-10 江苏康友医用器械有限公司 Cyclohexanone bonding assembly prevents volatilizing even coating device
WO2022055050A1 (en) * 2020-09-11 2022-03-17 주식회사 테라시온 바이오메디칼 Medical powder spraying device with easy adjustment of flow rate of powder being sprayed, and operating method for powder spraying device

Similar Documents

Publication Publication Date Title
US9415409B2 (en) Device for conveying coating powder from a powder container
CA2700566C (en) Ultrasonic atomizing nozzle with variable fan-spray feature
KR101343822B1 (en) Ultrasonic atomization nozzle integrated with spray pattern apparatus
CN110769941B (en) Coating head of mist coating film forming apparatus and maintenance method thereof
KR20040071273A (en) Method and apparatus for abrasive recycling and waste separation system
CN101155693B (en) Method for removing air from ink jet device, and ink jet device
US10099233B2 (en) Cosmetic air brush
KR101311200B1 (en) Spray gun for powder electrostatic coating
US3896998A (en) Apparatus for spraying particulate material
JP2005230794A (en) Small-amount powder supplying device for powder coating
JP2007181802A (en) Spray nozzle and insert
EP2678115B1 (en) Screen insert for a powder chamber of a powder supplying device
JP2005040681A (en) Small quantity powder supply apparatus for powder coating
US11446684B2 (en) Air-wash powder sieving apparatus for powder coating system
JP4787943B2 (en) Static electricity removing device and semiconductor element supply and / or transfer device using the same, powder supply and / or transfer device
JP2002018327A (en) Powder supply device
JP2020121236A (en) Nozzle deposit removing device and nozzle deposit removing method
JP3111954U (en) Hopper-type stable powder feeder
JP3155524U (en) Stable supply device for powder coating paint
JP2005028204A (en) Auxiliary device of spray gun
JP2007237089A (en) Spray gun for powder electrostatic coating
EP3508278B1 (en) Cosmetic air brush
JP2024069846A (en) Powder Coating Equipment
JPH0747325A (en) Powder coating device
JP2022156847A (en) Film deposition apparatus, and film deposition method

Legal Events

Date Code Title Description
A621 Written request for application examination

Effective date: 20070326

Free format text: JAPANESE INTERMEDIATE CODE: A621

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20100305

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100330

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20100810