JP2003117440A - Electrostatic coating apparatus and electrostatic coating method - Google Patents

Electrostatic coating apparatus and electrostatic coating method

Info

Publication number
JP2003117440A
JP2003117440A JP2001319386A JP2001319386A JP2003117440A JP 2003117440 A JP2003117440 A JP 2003117440A JP 2001319386 A JP2001319386 A JP 2001319386A JP 2001319386 A JP2001319386 A JP 2001319386A JP 2003117440 A JP2003117440 A JP 2003117440A
Authority
JP
Japan
Prior art keywords
air
coating gun
coating
gun
electrostatic coating
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
JP2001319386A
Other languages
Japanese (ja)
Other versions
JP3762888B2 (en
Inventor
Teruo Ando
輝夫 安藤
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.)
Asahi Sunac Corp
Original Assignee
Asahi Sunac 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 Asahi Sunac Corp filed Critical Asahi Sunac Corp
Priority to JP2001319386A priority Critical patent/JP3762888B2/en
Publication of JP2003117440A publication Critical patent/JP2003117440A/en
Application granted granted Critical
Publication of JP3762888B2 publication Critical patent/JP3762888B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/04Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B05B5/0403Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member
    • B05B5/0407Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member with a spraying edge, e.g. like a cup or a bell
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B5/00Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
    • B05B5/025Discharge apparatus, e.g. electrostatic spray guns
    • B05B5/04Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
    • B05B5/0426Means for supplying shaping gas

Landscapes

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

Abstract

PROBLEM TO BE SOLVED: To prevent a sprayed atomized coating material from adhering to the outer face of a coating gun. SOLUTION: Even if an atomized coating material P with minus polarity is going to adhere to the outer face of a coating gun 10, since air A bearing minus charge flows in the outer face of the coating gun 10, the atomized coating material P is inhibited from approaching to the outer face of the coating gun 19 owing to the repulsion of minus polarity. Even if the atomized coating material P approaches to the outer face of the coating gun 10, the atomized coating material P is blown forward so as to be parted from the coating gun 10 by being carried by the flow of the air A.

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、静電塗装機及び静
電塗装方法に関するものである。
TECHNICAL FIELD The present invention relates to an electrostatic coating machine and an electrostatic coating method.

【0002】[0002]

【従来の技術】静電塗装では、高電圧を印加された塗料
が塗装ガンから霧化されつつ被塗物に向けて噴出され、
その霧化塗料が、アースされている被塗物に向けて塗着
されるようになっている。
2. Description of the Related Art In electrostatic coating, a coating material to which a high voltage is applied is sprayed from a coating gun toward an object to be coated,
The atomized paint is applied to an object to be grounded.

【0003】[0003]

【発明が解決しようとする課題】上記のような静電塗装
においては、噴出された霧化塗料の一部が被塗物に塗着
せずに塗装ガン側へ跳ね返されることがあり、また、塗
装ブースが狭い場合には、霧化塗料の一部が塗装ブース
の内壁に当たって塗装ガン側へ跳ね返されることがある
が、跳ね返された霧化塗料は塗装ガンの外面に付着する
虞がある。
In the electrostatic coating as described above, a part of the sprayed atomized paint may be bounced back to the coating gun side without being adhered to the object to be coated. When the booth is small, a part of the atomized paint may hit the inner wall of the coating booth and be repelled toward the coating gun. However, the repelled atomized paint may adhere to the outer surface of the coating gun.

【0004】もし、霧化塗料が塗装ガンの外面に付着す
ると、その塗料を通じて高電圧電流がリークし、その結
果、塗料に印加される電位が低下することになる。本願
発明は上記事情に鑑みて創案され、噴出された霧化塗料
が塗装ガンの外面に付着するのを防止することを目的と
している。
If the atomized paint adheres to the outer surface of the coating gun, a high voltage current will leak through the paint, resulting in a reduced potential applied to the paint. The present invention was created in view of the above circumstances, and an object thereof is to prevent the sprayed atomized paint from adhering to the outer surface of the coating gun.

【0005】[0005]

【課題を解決するための手段】請求項1の発明は、塗装
ガンの前端からマイナス極の高電位に印加された霧化塗
料を噴出するようにした静電塗装機であって、前記塗装
ガンの外面に沿ったエアの流れを生成するエア生成手段
と、前記エア生成手段によって生成される前記エアにマ
イナス電荷を帯電させる帯電手段とを備えている構成と
した。
According to a first aspect of the present invention, there is provided an electrostatic coating machine in which an atomized paint applied to a high electric potential of a negative pole is jetted from the front end of the coating gun. The air generating means for generating a flow of air along the outer surface of the above, and the charging means for charging the air generated by the air generating means with a negative electric charge.

【0006】請求項2の発明は、請求項1の発明におい
て、前記塗装ガンの外面に、前記エアを吐出させる複数
のエア吐出口を開口させるとともに、その複数のエア吐
出口を包囲するガイド筒を設け、このガイド筒から流出
される前記エアによって前記塗装ガンの外面を覆う筒状
のエアカーテンが生成される構成とした。請求項3の発
明は、請求項1又は請求項2の発明において、前記塗装
ガンには、前記エアの流路が設けられているとともに、
塗料をマイナス極の高電位に印加する高電圧発生装置の
電極が前記エアの流路に臨むように設けられており、前
記エアが前記電極に接することでマイナス電荷を帯びる
構成とした。
According to a second aspect of the present invention, in the first aspect of the present invention, a plurality of air ejection ports for ejecting the air are opened on the outer surface of the coating gun, and a guide tube surrounding the plurality of air ejection ports. And a cylindrical air curtain that covers the outer surface of the coating gun is generated by the air flowing out from the guide cylinder. According to a third aspect of the invention, in the first or second aspect of the invention, the coating gun is provided with the air flow path,
An electrode of a high voltage generator for applying paint to a high potential of a negative pole is provided so as to face the flow path of the air, and when the air contacts the electrode, a negative charge is applied.

【0007】請求項4の発明は、請求項1乃至請求項3
のいずれかの発明において、前記塗装ガンには、その前
端において回転することで前記霧化塗料を遠心力によっ
て放出させる回転霧化頭と、この回転霧化頭を回転駆動
するエアタービンとが設けられており、前記エアタービ
ンから排出される空気が前記エアとして前記塗装ガンの
外面に沿って流される構成とした。請求項5の発明は、
塗装ガンの前端からマイナス極の高電位に印加された霧
化塗料を噴出する静電塗装方法であって、マイナス電荷
を帯電させたエアを、前記塗装ガンの外面に沿って流す
構成とした。
The invention of claim 4 relates to claim 1 to claim 3.
In any one of the inventions, the coating gun is provided with a rotary atomizing head that rotates at a front end thereof to discharge the atomized paint by centrifugal force, and an air turbine that rotationally drives the rotary atomizing head. The air discharged from the air turbine is made to flow along the outer surface of the coating gun as the air. The invention of claim 5 is
This is an electrostatic coating method in which atomized paint applied to a high potential of a negative pole is jetted from the front end of the coating gun, and air having a negative charge is flowed along the outer surface of the coating gun.

【0008】請求項6の発明は、請求項5の発明におい
て、前記塗装ガンの外面に、前記エアを吐出させる複数
のエア吐出口を開口させるとともに、その複数のエア吐
出口を包囲するガイド筒を設けた構成とした上で、前記
ガイド筒から流出される前記エアによって前記塗装ガン
の外面を覆う筒状のエアカーテンを生成する構成とし
た。請求項7の発明は、請求項5又は請求項6の発明に
おいて、前記塗装ガンに、前記エアの流路を設けるとと
もに、塗料をマイナス極の高電位に印加する高電圧発生
装置の電極を前記エアの流路に臨むように設けた構成と
した上で、前記エアを前記電極に接触させることでその
エアにマイナス電荷を帯電させる構成とした。
According to a sixth aspect of the present invention, in the fifth aspect of the invention, a plurality of air discharge ports for discharging the air are opened on the outer surface of the coating gun, and a guide tube surrounding the plurality of air discharge ports. In addition to the above structure, a cylindrical air curtain that covers the outer surface of the coating gun is generated by the air flowing out from the guide cylinder. According to a seventh aspect of the present invention, in the fifth or sixth aspect of the invention, the coating gun is provided with the air flow path, and the electrode of the high voltage generator for applying the coating material to the negative electrode high potential is provided. In addition to the structure provided so as to face the air flow path, the air is brought into contact with the electrode to charge the air with a negative charge.

【0009】請求項8の発明は、請求項5乃至請求項7
のいずれかの発明において、前記塗装ガンに、その前端
において回転することで前記霧化塗料を遠心力によって
放出させる回転霧化頭と、この回転霧化頭を回転駆動す
るエアタービンとを設けた構成とした上で、前記エアタ
ービンから排出される空気を前記エアとして前記塗装ガ
ンの外面に沿って流す構成とした。
The present invention of claim 8 is any of claims 5 to 7.
In any one of the inventions, the coating gun is provided with a rotary atomizing head that rotates at its front end to discharge the atomized paint by centrifugal force, and an air turbine that rotationally drives the rotary atomizing head. In addition to the configuration, the air discharged from the air turbine is made to flow as the air along the outer surface of the coating gun.

【0010】[0010]

【発明の作用及び効果】[請求項1及び請求項5の発
明]マイナス極に印加された霧化塗料が塗装ガンの外面
に付着しようとしても、塗装ガンの外面にはマイナス電
荷を帯びたエアが流れているので、マイナス極同士の反
発によって霧化塗料は塗装ガンの外面に接近することを
阻まれる。たとえ霧化塗料が塗装ガンの外面に接近して
も、その霧化塗料はエアの流れに乗じて塗装ガンから離
れる方向へ吹き飛ばされる。このように本発明によれ
ば、マイナス電荷を帯電させたエアを塗装ガンの外面に
沿って流すようにしたので、塗装ガンの外面に霧化塗料
が付着するのを防止することができる。
OPERATION AND EFFECTS OF THE INVENTION [Inventions 1 and 5] Even if the atomized paint applied to the negative pole tries to adhere to the outer surface of the coating gun, negatively charged air is applied to the outer surface of the coating gun. The repulsion between the negative poles prevents the atomized paint from approaching the outer surface of the painting gun. Even if the atomized paint approaches the outer surface of the painting gun, the atomized paint is blown away in the direction away from the painting gun by being carried by the air flow. As described above, according to the present invention, since the air charged with the negative charge is made to flow along the outer surface of the coating gun, it is possible to prevent the atomized coating material from adhering to the outer surface of the coating gun.

【0011】[請求項2及び請求項6の発明]塗装ガン
の外面は筒状のエアカーテンで覆われているので、霧化
塗料が塗装ガンの外面に付着するのが確実に防止され
る。 [請求項3及び請求項7の発明]塗料をマイナス極の高
電位に印加するための高電圧発生装置を、帯電手段とし
て兼用しているので、専用の帯電手段を設けずに済んで
いる。 [請求項4及び請求項8の発明]回転霧化頭を回転駆動
するためのエアタービン用の空気を、塗装ガンの外面に
沿って流れるエアとして兼用させているので、専用のエ
ア生成手段を設けずに済んでいる。
[Inventions 2 and 6] Since the outer surface of the coating gun is covered with a cylindrical air curtain, the atomized paint is reliably prevented from adhering to the outer surface of the coating gun. [Invention of Claims 3 and 7] Since the high voltage generator for applying the coating material to the high potential of the negative pole is also used as the charging means, it is not necessary to provide a dedicated charging means. [Inventions of Claims 4 and 8] Since the air for the air turbine for rotating and driving the rotary atomizing head is also used as the air flowing along the outer surface of the coating gun, a dedicated air generating means is used. It is not necessary to provide it.

【0012】[0012]

【発明の実施の形態】[実施形態1]以下、本発明を具
体化した実施形態1を図1乃至図6を参照して説明す
る。本実施形態の静電塗装機は、塗装ガン10の前端か
らマイナス極の高電位に印加された霧化塗料Pを噴出す
るようにしたものであって、塗装ガン10の外面に沿っ
たエアAの流れを生成するエア生成手段11と、エア生
成手段11によって生成されるエアAにマイナス電荷を
帯電させる帯電手段12とを備えて構成されている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] A first embodiment of the present invention will be described below with reference to FIGS. The electrostatic coating machine according to the present embodiment is designed to eject the atomized coating P applied to the high potential of the negative pole from the front end of the coating gun 10, and to provide the air A along the outer surface of the coating gun 10. The air generating means 11 for generating the flow of the air and the charging means 12 for charging the air A generated by the air generating means 11 with a negative electric charge are configured.

【0013】塗装ガン10は、導電性材料からなるとと
もにアースされた中空のグリップ13と、このグリップ
13の上端部前面に固着された絶縁性材料からなる銃身
14とからなる。トリガ15を操作すると、銃身14内
に設けたニードル弁16が開弁し、銃身14に圧送され
た塗料Pが導電性の塗料パイプ17を通って回転霧化頭
18に供給される。塗料パイプ17には、銃身14内に
収容した高電圧発生装置19の前端部のピン状をなす電
極19aが接触しており、塗料Pは、ニードル弁16を
通過した直後に塗料パイプ17内でマイナス極の高電圧
に印加される。一方、回転霧化頭18は、塗装ガン10
の前端部に配されていて、エアタービン20によって高
速で回転駆動される。そして、高電圧を印加された状態
で回転霧化頭18に供給された塗料Pは、回転霧化頭1
8の遠心力により塗装ガン10の前端から放出されると
ともに、霧化用エア噴出口21から噴出される霧化用エ
アによって霧化状態とされ、この放出された霧化塗料P
は、アースされている被塗物(図示せず)に塗着され
る。
The coating gun 10 comprises a hollow grip 13 made of a conductive material and grounded, and a barrel 14 made of an insulating material and fixed to the front surface of the upper end of the grip 13. When the trigger 15 is operated, the needle valve 16 provided inside the barrel 14 is opened, and the paint P pressure-fed to the barrel 14 is supplied to the rotary atomizing head 18 through the conductive paint pipe 17. The paint pipe 17 is in contact with the pin-shaped electrode 19a at the front end of the high-voltage generator 19 housed in the barrel 14, and the paint P is stored in the paint pipe 17 immediately after passing through the needle valve 16. It is applied to the high voltage of the negative pole. On the other hand, the rotary atomizing head 18 is used for the coating gun 10.
Is arranged at the front end portion of and is driven to rotate at high speed by the air turbine 20. Then, the paint P supplied to the rotary atomizing head 18 in the state in which the high voltage is applied is the rotary atomizing head 1
8 is discharged from the front end of the coating gun 10 by the centrifugal force of 8, and is atomized by the atomizing air ejected from the atomizing air ejection port 21.
Is applied to a grounded object (not shown).

【0014】このとき、霧化塗料Pの一部は、被塗物に
当たってもそこに塗着せずに跳ね返り、塗装ガン10に
向かって戻って来ることがある。また、塗装ブース(図
示せず)が狭い場合には、被塗物の脇をすり抜けて塗装
ブースの内壁に当たった霧化塗料Pの一部が、塗装ガン
10側へ跳ね返って来ることがある。このような場合、
戻ってきた霧化塗料Pの一部が塗装ガン10の銃身14
の外面に付着し、その付着した塗料Pを通して高電圧電
流がリークし、その結果、塗料Pに印加される電位が低
下する虞がある。そのため、本実施形態では、塗料Pが
塗装ガン10の外面に付着するのを防止する手段が講じ
られている。以下、その手段について説明する。
At this time, even if a part of the atomized paint P hits the object to be coated, it may bounce back without adhering to the object, and may return toward the coating gun 10. Further, when the coating booth (not shown) is small, a part of the atomized coating P that has slipped through the side of the object to be coated and hit the inner wall of the coating booth may bounce back to the coating gun 10 side. . In such cases,
Part of the atomized paint P returned is the barrel 14 of the painting gun 10.
There is a risk that the high-voltage current leaks through the outer surface of the paint P, and the high-voltage current leaks through the adhered paint P, resulting in a decrease in the potential applied to the paint P. Therefore, in the present embodiment, a measure is taken to prevent the paint P from adhering to the outer surface of the coating gun 10. The means will be described below.

【0015】塗装ガン10の内部には、塗装ガン10の
外面に霧化塗料Pが付着するのを防止するための付着防
止用エアA(以下、単に「エア」という)の流路が設け
られている。このエアAの流路は、グリップ13の下端
面から上端部に至るパイプ状の第1流路22A、第1流
路22Aから前方に向けてグリップ13の上端部前端面
に臨むように設けた穿孔状の第2流路22B、銃身14
の後端部に組み付けた前後方向に長いパイプ状の第3流
路22C、第3流路22Cの前端部と連通するように銃
身14内に形成したリング状の第4流路22D、第4流
路22Dから前方のエアタービン20に向かって屈曲し
た経路に形成された第5流路22E、エアタービン20
を囲むリング状の第6流路22F、第6流路22Fから
エアタービン20に向けて径方向内向きにエアを噴出す
る孔状をなす複数の第7流路22G、エアタービン20
が収容されているリング状の空間からなる第8流路22
H、第8流路22Hから後方に向かって延びるように形
成された第9流路22I、第9流路22Iの後端に連通
するようにリング状に形成された第10流路22J、第
10流路22Jから後方へ延びるように形成された第1
1流路22K、第11流路22Kの後端に連通する空間
からなるともに第3流路22Cを構成するパイプ、ニー
ドル弁16及び高電圧発生装置19を貫通させた第12
流路22Lとから構成されている。グリップ13の下端
部にコンプレッサ(図示せず)によって圧送されたエア
Aは、第1〜第12の各流路22A〜22Lを順に通っ
て流れる。
Inside the coating gun 10, there is provided a flow path of adhesion preventing air A (hereinafter, simply referred to as “air”) for preventing the atomized paint P from adhering to the outer surface of the coating gun 10. ing. The flow path of the air A is provided so as to face the front end surface of the upper end portion of the grip 13 from the lower end surface of the grip 13 to the upper end portion of the pipe 13 and the first flow path 22A toward the front. Perforated second flow path 22B, barrel 14
A pipe-shaped third flow passage 22C that is long in the front-rear direction and is attached to the rear end portion, and a ring-shaped fourth flow passage 22D that is formed inside the barrel 14 so as to communicate with the front end portion of the third flow passage 22C A fifth flow path 22E formed in a path bent from the flow path 22D toward the front air turbine 20, the air turbine 20
A ring-shaped sixth flow path 22F, a plurality of hole-shaped seventh flow paths 22G that ejects air radially inward from the sixth flow path 22F toward the air turbine 20, and the air turbine 20
Eighth flow path 22 consisting of a ring-shaped space in which
H, a ninth flow path 22I formed to extend rearward from the eighth flow path 22H, a tenth flow path 22J formed in a ring shape so as to communicate with the rear end of the ninth flow path 22I, First formed so as to extend rearward from the 10-channel 22J
A twelfth pipe having a space communicating with the rear ends of the first flow passage 22K and the eleventh flow passage 22K and forming the third flow passage 22C, the needle valve 16, and the high voltage generator 19 passing through the pipe.
The flow path 22L. The air A pumped to the lower end of the grip 13 by a compressor (not shown) flows through the first to twelfth channels 22A to 22L in order.

【0016】また、銃身14の後端部には、第12流路
22Lに連通するとともに銃身14の外面に開口するエ
ア吐出口23が、周方向に間隔を空けて複数形成されて
いる。同じく、銃身14の後端部には、その複数のエア
吐出口23を包囲する形態のガイド筒24が形成されて
いる。ガイド筒24は、銃身14とほぼ同心状であって
全周に渡って連続した円筒形をなしており、換言する
と、銃身14の外面とガイド筒24との間には、エア吐
出口23に連通するとともに全周に亘って連続した形態
の円筒状空間25が構成されている。また、この円筒状
空間25の後端部は、ガイド筒24を銃身14に支持す
るための支持部26により全周に亘って塞がれており、
したがって、円筒状空間25は前方のみに開放されてい
ることになる。このエア吐出口23とガイド筒24は、
塗装ガン10の外面に沿ったエアAの流れを生成するた
めのエア生成手段11として機能する。
A plurality of air discharge ports 23, which communicate with the twelfth flow path 22L and open to the outer surface of the barrel 14, are formed at the rear end of the barrel 14 at intervals in the circumferential direction. Similarly, a guide tube 24 is formed at the rear end of the barrel 14 so as to surround the plurality of air discharge ports 23. The guide cylinder 24 is substantially concentric with the barrel 14 and has a continuous cylindrical shape over the entire circumference. In other words, between the outer surface of the barrel 14 and the guide cylinder 24, an air discharge port 23 is formed. A cylindrical space 25 that communicates with and is continuous over the entire circumference is formed. Further, the rear end portion of the cylindrical space 25 is closed over the entire circumference by a support portion 26 for supporting the guide cylinder 24 on the barrel 14,
Therefore, the cylindrical space 25 is open only to the front. The air discharge port 23 and the guide tube 24 are
It functions as an air generating means 11 for generating a flow of air A along the outer surface of the coating gun 10.

【0017】尚、ガイド筒24の後端部(エア吐出口2
3よりも後方の位置)には、円筒状空間25をガイド筒
24の外面に開口させる逃がし孔27が形成されてお
り、シンナーによって塗装ガン10の外面を洗浄したと
きに、円筒状空間25内に入り込んだシンナーが逃がし
孔27を通して外部へ排出されるようになっている。ま
た、エアAの流路22A〜22Lのうち、リング状の第
4流路22Dには、上記した塗料Pをマイナス極の高電
位に印加するための高電圧発生装置19の電極19aの
基端部が臨んでいる。したがって、エアAの流路22A
〜22Lを流れたエアAは、第4流路22Dにおいて電
極19aに接触することにより、マイナス電荷を帯びる
ことになる。即ち、高電圧発生装置19は、エアAにマ
イナス電荷を帯電させるための帯電手段12として機能
するのである。
The rear end portion of the guide tube 24 (air discharge port 2
At a position rearward of 3), an escape hole 27 for opening the cylindrical space 25 to the outer surface of the guide cylinder 24 is formed, and when the outer surface of the coating gun 10 is cleaned with a thinner, the inside of the cylindrical space 25 is The thinner that has entered is discharged to the outside through the escape hole 27. Further, among the flow paths 22A to 22L for the air A, the base end of the electrode 19a of the high voltage generator 19 for applying the above-mentioned coating material P to the high potential of the negative pole is provided in the ring-shaped fourth flow path 22D. The department is facing. Therefore, the flow path 22A for the air A is
The air A that has flowed through 22L contacts the electrode 19a in the fourth flow path 22D, and thus becomes negatively charged. That is, the high voltage generator 19 functions as the charging means 12 for charging the air A with negative charges.

【0018】次に、上記構成になる本実施形態の静電塗
装機を用いた静電塗装方法について説明する。グリップ
13に圧送されたエアAは、第1〜第12の各流路22
A〜22Lを順に通った後に、エア吐出口23から円筒
状空間25内に圧送され、その前端のリング状の開口か
ら塗装ガン10の銃身14の外面に沿って前方へ流れ
る。このとき、円筒状空間25の前端の開口は全周に亘
って連続したリング状をなしているので、銃身14の外
面に沿ったエアAの流れは、全周に亘って連続した筒状
のエアカーテンを構成する。そして、このエアカーテン
により銃身14の外面は全周に亘って包囲される。尚、
図6においては、エアAの流れを便宜上「線」で表して
いるが、エアAは筒状の層流状となる。
Next, an electrostatic coating method using the electrostatic coating machine of this embodiment having the above-mentioned structure will be described. The air A that has been pressure-fed to the grip 13 receives the first to twelfth flow paths 22.
After passing through A to 22L in order, the air is discharged from the air discharge port 23 into the cylindrical space 25, and flows forward along the outer surface of the barrel 14 of the coating gun 10 from the ring-shaped opening at the front end thereof. At this time, since the opening at the front end of the cylindrical space 25 has a continuous ring shape over the entire circumference, the flow of the air A along the outer surface of the barrel 14 is a continuous cylindrical shape over the entire circumference. Configure the air curtain. The outer surface of the barrel 14 is surrounded by the air curtain over the entire circumference. still,
In FIG. 6, the flow of the air A is represented by a “line” for convenience, but the air A has a cylindrical laminar flow shape.

【0019】塗装ガン10の内部を流れるエアAは、第
4流路22Dにおいて高電圧発生装置19の電極19a
に接触することによってマイナス電荷を帯び、その後、
第5〜第12流路22E〜22L、エア吐出口23及び
円筒状空間25を通過する間もマイナス電荷を帯びた状
態に保たれる。したがって、銃身14の外面に沿って流
れるエアA(エアカーテン)もマイナス電荷を帯びた状
態に保たれている。このように銃身14(塗装ガン1
0)の外面にマイナス電荷を帯びたエアAが流れている
状態では、銃身14の外面にマイナス極に印加されてい
る霧化塗料Pが接近しても、マイナス極同士の反発によ
って霧化塗料Pは塗装ガン10の外面に接近することを
阻まれ、塗装ガン10から遠ざかる。たとえ霧化塗料P
が塗装ガン10の外面に接近してエアA(エアカーテ
ン)の中に突入しても、その霧化塗料Pは、銃身14の
外面に付着することなく、エアAの流れに乗じて塗装ガ
ン10の前方へ吹き飛ばされる。このように本実施形態
においては、マイナス電荷を帯電させたエアAを塗装ガ
ン10の外面に沿って流すようにしたので、塗装ガン1
0の外面に霧化塗料Pが付着するのを防止することがで
きる。
The air A flowing inside the coating gun 10 is supplied to the electrode 19a of the high voltage generator 19 in the fourth flow path 22D.
Is negatively charged by touching, and then
The negative charge is maintained while passing through the fifth to twelfth channels 22E to 22L, the air discharge port 23, and the cylindrical space 25. Therefore, the air A (air curtain) flowing along the outer surface of the barrel 14 is also kept negatively charged. In this way barrel 14 (paint gun 1
In the state where the air A having a negative charge is flowing on the outer surface of (0), even if the atomized paint P applied to the negative pole approaches the outer surface of the barrel 14, the atomized paint is repulsed by the negative poles. P is prevented from approaching the outer surface of the coating gun 10 and moves away from the coating gun 10. Even if the atomized paint P
Even if the vehicle comes close to the outer surface of the coating gun 10 and plunges into the air A (air curtain), the atomized paint P does not adhere to the outer surface of the barrel 14 and is multiplied by the flow of the air A to cause the coating gun to move. It is blown to the front of 10. As described above, in the present embodiment, since the air A charged with the negative charge is made to flow along the outer surface of the coating gun 10, the coating gun 1
It is possible to prevent the atomized paint P from adhering to the outer surface of No. 0.

【0020】また、銃身14の外面に沿って流れるエア
Aは、筒状のエアカーテンを構成して銃身14を全周に
亘って包囲しているので、霧化塗料Pが塗装ガン10の
外面に付着するのを確実に防止することができる。ま
た、塗料Pをマイナス極の高電位に印加するための高電
圧発生装置19を、帯電手段12として兼用させている
ので、専用の帯電手段を設けずに済んでいる。また、銃
身14(塗装ガン10)の外面に霧化塗料Pが付着する
のを防止するためのエアAは、その流路22A〜22L
の途中で第7流路22Gから第8流路22H内のエアタ
ービン20に向かって噴出することによりそのエアター
ビン20を高速で回転駆動させるための駆動力となり、
その後、第9流路22I〜第12流路22L、エア吐出
口23及び円筒状空間25を経る経路、即ちエアタービ
ン20の排出経路を通って塗装ガン10の外部に至るよ
うになっている。つまり、本実施形態では、回転霧化頭
18を回転駆動するためのエアタービン20用の排出空
気を、塗装ガン10の外面に沿って流れるエアAとして
兼用させているので、専用のエア生成手段を設けずに済
んでいる。
Further, since the air A flowing along the outer surface of the barrel 14 forms a cylindrical air curtain and surrounds the barrel 14 all around, the atomized paint P is applied to the outer surface of the coating gun 10. It can be surely prevented from adhering to. Further, since the high voltage generator 19 for applying the paint P to the negative high potential is also used as the charging means 12, it is not necessary to provide a dedicated charging means. Further, the air A for preventing the atomized paint P from adhering to the outer surface of the barrel 14 (painting gun 10) has the flow paths 22A to 22L.
In the middle of, the jetting from the seventh flow passage 22G toward the air turbine 20 in the eighth flow passage 22H provides a driving force for rotationally driving the air turbine 20 at high speed,
After that, it reaches the outside of the coating gun 10 through a route passing through the ninth flow passage 22I to the twelfth flow passage 22L, the air discharge port 23, and the cylindrical space 25, that is, the discharge route of the air turbine 20. That is, in the present embodiment, the exhaust air for the air turbine 20 for rotationally driving the rotary atomizing head 18 is also used as the air A flowing along the outer surface of the coating gun 10, so that a dedicated air generating means is used. It does not have to be provided.

【0021】[他の実施形態]本発明は上記記述及び図
面によって説明した実施形態に限定されるものではな
く、例えば次のような実施態様も本発明の技術的範囲に
含まれ、さらに、下記以外にも要旨を逸脱しない範囲内
で種々変更して実施することができる。 (1)上記実施形態ではエアが塗装ガンの前方に向かっ
て流れるようにしたが、本発明によれば、エアを塗装ガ
ンの後方に向かって流してもよい。
[Other Embodiments] The present invention is not limited to the embodiments described above with reference to the drawings. For example, the following embodiments are also included in the technical scope of the present invention. In addition to the above, various modifications can be made without departing from the scope of the invention. (1) In the above embodiment, the air is made to flow toward the front of the coating gun, but according to the present invention, the air may be made to flow toward the rear of the coating gun.

【0022】(2)上記実施形態ではエアが筒状のエア
カーテンを構成するようにしたが、本発明によれば、エ
アが複数本の筋状に分かれて流れるようにしてもよい。 (3)上記実施形態では作業者が手で掴んで操作するハ
ンドガンに適用した例について説明したが、本発明は、
自動ガンにも適用することができる。 (4)上記実施形態ではエアにマイナス電荷を帯電させ
る手段として高電圧発生装置を利用したが、本発明によ
れば、高電圧発生装置とは別に専用の帯電装置を設けて
もよい。
(2) In the above embodiment, the air constitutes the cylindrical air curtain. However, according to the present invention, the air may be divided into a plurality of streaks to flow. (3) In the above-described embodiment, an example in which the operator applies to a hand gun that is gripped and operated by a hand has been described.
It can also be applied to automatic guns. (4) In the above embodiment, the high voltage generator is used as the means for charging the air with negative charges, but according to the present invention, a dedicated charger may be provided separately from the high voltage generator.

【0023】(5)上記実施形態ではエアの流路を塗装
ガンの内部に設け、その流路内のエアを塗装ガンの外面
側へ吐出させるようにしたが、本発明によれば、塗装ガ
ンの外部にエアの流路を設けてもよい。 (6)上記実施形態では回転霧化頭を回転駆動するため
のエアタービン用の空気を、塗装ガンの外面に沿って流
れるエアとして兼用させたが、本発明によれば、エアタ
ービン用の空気とは別に、塗装ガンの外面への霧化塗料
の付着を防止する専用のエアを塗装ガンに供給してもよ
い。
(5) In the above embodiment, the air flow path is provided inside the coating gun, and the air in the flow path is discharged to the outer surface side of the coating gun. An air flow path may be provided outside the. (6) In the above embodiment, the air for the air turbine for rotationally driving the rotary atomizing head is also used as the air flowing along the outer surface of the coating gun. However, according to the present invention, the air for the air turbine is used. Separately, dedicated air for preventing the atomized paint from adhering to the outer surface of the coating gun may be supplied to the coating gun.

【0024】(7)上記実施形態ではエアタービンによ
って回転駆動される回転霧化頭を有する塗装ガンに適用
した例を説明したが、本発明は、回転霧化頭を有しない
塗装ガンにも適用することができる。 (8)上記実施形態では塗装ガンの内部でエアにマイナ
ス電荷を帯電させたが、本発明によれば、塗装ガンの外
部でエアにマイナス電荷を帯電させるようにしてもよ
い。
(7) In the above embodiment, an example in which the present invention is applied to a coating gun having a rotary atomizing head which is rotationally driven by an air turbine has been described, but the present invention is also applied to a coating gun having no rotary atomizing head. can do. (8) In the above embodiment, the air is negatively charged inside the coating gun. However, according to the present invention, the air may be negatively charged outside the coating gun.

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

【図1】実施形態1の縦断面図FIG. 1 is a vertical sectional view of a first embodiment.

【図2】銃身部分の拡大縦断面図FIG. 2 is an enlarged vertical sectional view of a barrel portion.

【図3】銃身部分の拡大水平断面図FIG. 3 is an enlarged horizontal sectional view of a barrel portion.

【図4】エアの流路をあらわす図2の部分拡大図FIG. 4 is a partially enlarged view of FIG. 2 showing an air flow path.

【図5】エアの流路をあらわす図3の部分拡大図FIG. 5 is a partially enlarged view of FIG. 3 showing an air flow path.

【図6】エアの流れによって霧化塗料の付着が防止され
ている様子をあらわす斜視図
FIG. 6 is a perspective view showing a state in which atomized paint is prevented from adhering by the flow of air.

【符号の説明】[Explanation of symbols]

10…塗装ガン 11…エア生成手段 12…帯電手段 18…回転霧化頭 19…高電圧発生装置 19a…電極 23…エア吐出口 20…エアタービン 22A〜22L…エアの流路 24…ガイド筒 A…エア P…霧化塗料 10 ... Painting gun 11 ... Air generating means 12 ... Charging means 18 ... Rotary atomizing head 19 ... High voltage generator 19a ... Electrode 23 ... Air outlet 20 ... Air turbine 22A to 22L ... Air flow path 24 ... Guide tube A ... Air P ... Atomized paint

Claims (8)

【特許請求の範囲】[Claims] 【請求項1】 塗装ガンの前端からマイナス極の高電位
に印加された霧化塗料を噴出するようにした静電塗装機
であって、 前記塗装ガンの外面に沿ったエアの流れを生成するエア
生成手段と、 前記エア生成手段によって生成される前記エアにマイナ
ス電荷を帯電させる帯電手段とを備えていることを特徴
とする静電塗装機。
1. An electrostatic coating machine for spraying atomized paint applied to a high electric potential of a negative pole from the front end of the coating gun, wherein an air flow is generated along the outer surface of the coating gun. An electrostatic coating machine, comprising: an air generating unit; and a charging unit that charges the air generated by the air generating unit with a negative charge.
【請求項2】 前記塗装ガンの外面に、前記エアを吐出
させる複数のエア吐出口を開口させるとともに、その複
数のエア吐出口を包囲するガイド筒を設け、このガイド
筒から流出される前記エアによって前記塗装ガンの外面
を覆う筒状のエアカーテンが生成されるようにしたこと
を特徴とする請求項1記載の静電塗装機。
2. An outer surface of the coating gun is provided with a plurality of air ejection openings for ejecting the air, and a guide cylinder surrounding the plurality of air ejection openings is provided, and the air discharged from the guide cylinder is provided. The electrostatic coating machine according to claim 1, wherein a cylindrical air curtain that covers the outer surface of the coating gun is generated by the method.
【請求項3】 前記塗装ガンには、前記エアの流路が設
けられているとともに、塗料をマイナス極の高電位に印
加する高電圧発生装置の電極が前記エアの流路に臨むよ
うに設けられており、前記エアが前記電極に接すること
でマイナス電荷を帯びる構成としたことを特徴とする請
求項1又は請求項2記載の静電塗装機。
3. The coating gun is provided with the air flow path, and an electrode of a high voltage generator for applying paint to a high potential of a negative pole is provided so as to face the air flow path. The electrostatic coating machine according to claim 1 or 2, wherein the air is charged with a negative electric charge by coming into contact with the electrode.
【請求項4】 前記塗装ガンには、その前端において回
転することで前記霧化塗料を遠心力によって放出させる
回転霧化頭と、この回転霧化頭を回転駆動するエアター
ビンとが設けられており、 前記エアタービンから排出される空気が前記エアとして
前記塗装ガンの外面に沿って流される構成としたことを
特徴とする請求項1乃至請求項3のいずれかに記載の静
電塗装機。
4. The coating gun is provided with a rotary atomizing head that rotates at its front end to discharge the atomized paint by centrifugal force, and an air turbine that rotationally drives the rotary atomizing head. The electrostatic coating machine according to any one of claims 1 to 3, wherein the air discharged from the air turbine is made to flow as the air along an outer surface of the coating gun.
【請求項5】 塗装ガンの前端からマイナス極の高電位
に印加された霧化塗料を噴出する静電塗装方法であっ
て、 マイナス電荷を帯電させたエアを、前記塗装ガンの外面
に沿って流すことを特徴とする静電塗装方法。
5. An electrostatic coating method in which atomized paint applied to a high potential of a negative pole is jetted from the front end of the coating gun, wherein air charged with a negative charge is applied along the outer surface of the coating gun. An electrostatic coating method characterized by flowing.
【請求項6】 前記塗装ガンの外面に、前記エアを吐出
させる複数のエア吐出口を開口させるとともに、その複
数のエア吐出口を包囲するガイド筒を設けた構成とした
上で、 前記ガイド筒から流出される前記エアによって前記塗装
ガンの外面を覆う筒状のエアカーテンを生成することを
特徴とする請求項5記載の静電塗装方法。
6. An outer surface of the coating gun is provided with a plurality of air ejection openings for ejecting the air, and a guide cylinder surrounding the plurality of air ejection openings is provided, and the guide cylinder is provided. 6. The electrostatic coating method according to claim 5, wherein a cylindrical air curtain that covers the outer surface of the coating gun is generated by the air that flows out from the electrostatic coating method.
【請求項7】 前記塗装ガンに、前記エアの流路を設け
るとともに、塗料をマイナス極の高電位に印加する高電
圧発生装置の電極を前記エアの流路に臨むように設けた
構成とした上で、 前記エアを前記電極に接触させることでそのエアにマイ
ナス電荷を帯電させることを特徴とする請求項5又は請
求項6記載の静電塗装方法。
7. The coating gun is provided with the air flow path, and an electrode of a high voltage generator for applying paint to a high potential of a negative pole is provided so as to face the air flow path. The electrostatic coating method according to claim 5 or 6, wherein the air is charged with a negative electric charge by bringing the air into contact with the electrode.
【請求項8】 前記塗装ガンに、その前端において回転
することで前記霧化塗料を遠心力によって放出させる回
転霧化頭と、この回転霧化頭を回転駆動するエアタービ
ンとを設けた構成とした上で、 前記エアタービンから排出される空気を前記エアとして
前記塗装ガンの外面に沿って流すことを特徴とする請求
項5乃至請求項7のいずれかに記載の静電塗装方法。
8. A structure in which the coating gun is provided with a rotary atomizing head that rotates at its front end to discharge the atomized paint by centrifugal force, and an air turbine that rotationally drives the rotary atomizing head. Then, the air discharged from the air turbine is made to flow along the outer surface of the coating gun as the air, and the electrostatic coating method according to any one of claims 5 to 7.
JP2001319386A 2001-10-17 2001-10-17 Electrostatic coating machine and electrostatic coating method Expired - Fee Related JP3762888B2 (en)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001319386A JP3762888B2 (en) 2001-10-17 2001-10-17 Electrostatic coating machine and electrostatic coating method

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JP2003117440A true JP2003117440A (en) 2003-04-22
JP3762888B2 JP3762888B2 (en) 2006-04-05

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KR20180010330A (en) * 2013-08-14 2018-01-30 구글 엘엘씨 Presenting open windows and tabs
JP2018079401A (en) * 2016-11-14 2018-05-24 旭サナック株式会社 Spray gun for electrostatic coating
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