JP2790153B2 - Electrostatic coating method - Google Patents
Electrostatic coating methodInfo
- Publication number
- JP2790153B2 JP2790153B2 JP3137682A JP13768291A JP2790153B2 JP 2790153 B2 JP2790153 B2 JP 2790153B2 JP 3137682 A JP3137682 A JP 3137682A JP 13768291 A JP13768291 A JP 13768291A JP 2790153 B2 JP2790153 B2 JP 2790153B2
- Authority
- JP
- Japan
- Prior art keywords
- path
- cleaning
- electrostatic coating
- atomizing head
- rotary atomizing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/10—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
- B05B3/1064—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces the liquid or other fluent material to be sprayed being axially supplied to the rotating member through a hollow rotating shaft
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Electrostatic Spraying Apparatus (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高電圧が直接印加され
る導電性塗料を用いて回転霧化式塗装ガンにより静電塗
装を行う静電塗装方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostatic coating method in which a conductive coating to which a high voltage is directly applied is used to perform electrostatic coating by a rotary atomizing coating gun.
【０００２】[0002]
【従来の技術】従来から、導電性塗料に高電圧を直接印
加して自動車車体等の被塗装物に静電塗装を施す方法と
して、例えばボルテージブロック法が知られている。こ
の方法では、導電性塗料が、接地電位から絶縁されてい
る中間貯留槽に一旦導入された後、この中間貯留槽から
塗料経路を通って高電位にある塗装ガンに供給されるこ
とにより、被塗装物に対する静電塗装作業が行われてい
る。2. Description of the Related Art Conventionally, for example, a voltage block method is known as a method of applying a high voltage directly to a conductive paint to apply an electrostatic coating to a workpiece such as an automobile body. In this method, the conductive paint is first introduced into an intermediate storage tank that is insulated from the ground potential, and then supplied from the intermediate storage tank to a high-potential coating gun through a paint path. 2. Description of the Related Art An electrostatic painting operation is performed on a painted object.
【０００３】この方法において、前記塗装ガンに、回転
カップ（回転霧化頭）を備えた回転霧化式塗装ガンを使
用すると、導電性塗料である水性塗料が、この回転カッ
プに付着して乾燥被膜が形成され易い。このため、前記
乾燥被膜が回転カップから剥離して被塗装物に付着し、
塗装不良が発生するという問題がある。In this method, when a rotary atomizing type coating gun provided with a rotary cup (rotary atomizing head) is used as the coating gun, an aqueous paint which is a conductive paint adheres to the rotary cup and is dried. A coating is easily formed. For this reason, the dried coating peels off from the rotating cup and adheres to the object to be coated,
There is a problem that coating failure occurs.
【０００４】そこで、例えば特公平２−５７９９４号公
報に開示されているように、被塗装物に対して塗装作業
を行っている間に、回転カップに洗浄水を断続的に供給
してこの回転カップの洗浄を行う方法が知られている。Therefore, as disclosed in, for example, Japanese Patent Publication No. 2-57994, the washing water is intermittently supplied to the rotating cup during the painting operation on the object to be coated. A method for cleaning a cup is known.
【０００５】[0005]
【発明が解決しようとする課題】ところが、上記の従来
技術では、回転カップに洗浄水が断続的に供給されるた
め、静電塗装を行うべく水性塗料に高電圧を直接印加す
る際、この洗浄水を通じて漏電するおそれがある。従っ
て、水性塗料に印加される電圧が安定せず、塗着効率の
不均一化により静電塗装品質の低下が発生するという問
題がある。しかも、印加電圧が著しく低下して静電塗装
を遂行することができないという問題も指摘される。However, in the above-mentioned prior art, the cleaning water is intermittently supplied to the rotating cup. Therefore, when a high voltage is directly applied to the water-based paint in order to perform electrostatic coating, this cleaning is performed. Electric leakage may occur through water. Accordingly, there is a problem that the voltage applied to the water-based paint is not stable, and the quality of electrostatic coating is deteriorated due to uneven coating efficiency. In addition, a problem is pointed out that the applied voltage is remarkably reduced so that the electrostatic coating cannot be performed.
【０００６】本発明は、この種の問題を解決するもので
あり、回転霧化頭を効果的に洗浄することができるとと
もに、導電性塗料に高電圧が直接印加される際にその洗
浄液等を介して漏電することを阻止し、しかも、前記洗
浄液を円滑かつ確実に外部に排出させることが可能な静
電塗装方法を提供することを目的とする。The present invention solves this kind of problem, and can effectively clean the rotary atomizing head and, when a high voltage is directly applied to the conductive paint, use the cleaning liquid and the like. It is an object of the present invention to provide an electrostatic coating method capable of preventing a leakage through the cleaning liquid and discharging the cleaning liquid smoothly and reliably to the outside.
【０００７】[0007]
【課題を解決するための手段】前記の目的を達成するた
めに、本発明は、高電圧が直接印加される導電性塗料
を、塗料供給経路を介して回転霧化式塗装ガンに供給
し、該回転霧化式塗装ガンから被塗装物に噴霧して静電
塗装を施す過程と、前記静電塗装終了後に前記塗料供給
経路とは個別に設けられた回転霧化頭洗浄用経路を介し
て該回転霧化頭に洗浄液を供給し、前記回転霧化頭を洗
浄する過程と、前記洗浄終了後に前記回転霧化頭洗浄用
経路内に、洗浄液の排出量が前記回転霧化頭から導出可
能な量になるように設定された圧力のエアを供給して前
記回転霧化頭洗浄用経路内に残存する洗浄液を排出させ
る過程と、前記回転霧化頭洗浄用経路内に、前記圧力よ
りも高圧のエアを供給して前記回転霧化頭洗浄用経路を
乾燥させる過程と、前記乾燥終了後に次なる静電塗装作
業を遂行する過程とを有することを特徴とする。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is to supply a conductive paint to which a high voltage is directly applied to a rotary atomizing paint gun through a paint supply path.
And the steps of applying electrostatic coating sprayed onto the object to be coated from the rotary atomizing type spray gun, the paint supplied after the electrostatic coating ends
A step of supplying a cleaning liquid to the rotary atomizing head via a rotary atomizing head cleaning path provided separately from the path, and cleaning the rotary atomizing head; and The discharge amount of cleaning liquid can be derived from the rotary atomizing head
Comprising the steps of supplying the set air pressure so that the capacity amounts to discharge the cleaning liquid remaining in the rotary atomizing head washing path, the rotary atomizing head washing path, from the pressure The method further comprises a step of supplying high-pressure air to dry the rotary atomizing head cleaning path, and a step of performing the next electrostatic coating operation after the drying is completed.
【０００８】[0008]
【作用】上記の本発明に係る静電塗装方法では、静電塗
装終了後に洗浄用経路を介して回転霧化頭に洗浄液が供
給されてこの回転霧化頭が洗浄された後、まず前記洗浄
用経路内に比較的低圧のエアが供給されてこの洗浄用経
路内に残存する洗浄液が排出される。次に、この洗浄用
経路内に比較的高圧のエアが供給されて洗浄用経路が乾
燥されるため、次なる静電塗装作業を行うべく導電性塗
料に高電圧が直接印加される際に、この洗浄用経路を通
じて漏電することを阻止できる。しかも、洗浄液を洗浄
用経路から外部に排出させるためのエアの供給圧が、比
較的低圧に設定されるため、洗浄液が回転霧化頭から外
部に導出されず、例えばエアモータのタービン内に逆流
することを有効に阻止することが可能になる。In the above-described electrostatic coating method according to the present invention, after the electrostatic coating is completed, a cleaning liquid is supplied to the rotary atomizing head via a cleaning path, and the rotary atomizing head is cleaned. A relatively low pressure air is supplied into the cleaning path, and the cleaning liquid remaining in the cleaning path is discharged. Next, since relatively high-pressure air is supplied into the cleaning path to dry the cleaning path, when a high voltage is directly applied to the conductive paint to perform the next electrostatic coating operation, Leakage through this cleaning path can be prevented. In addition, since the supply pressure of the air for discharging the cleaning liquid from the cleaning path to the outside is set to a relatively low pressure, the cleaning liquid is not drawn out from the rotary atomizing head, but flows back into, for example, the turbine of the air motor. Can be effectively prevented.
【０００９】[0009]
【実施例】本発明に係る静電塗装方法について、これを
実施するための装置との関連で実施例を挙げ、添付の図
面を参照しながら以下詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The electrostatic coating method according to the present invention will be described in detail below with reference to the accompanying drawings by way of examples in connection with an apparatus for carrying out the method.
【００１０】図２において、参照符号１０は、本発明に
係る静電塗装方法を実施するための静電塗装装置を示
す。この静電塗装装置１０は、接地された色替弁機構１
２を備え、この色替弁機構１２には、エア（Ａ）、水
（Ｗ）および洗浄液（Ｓ）等の供給を制御する第１洗浄
弁１４と、異なる色の導電性塗料を供給することが可能
な複数の塗料弁１６ａ乃至１６ｃとが備えられている。
この色替弁機構１２には、少なくとも一部にポリテトラ
フルオロエチレン（ＰＴＦＥ）等の樹脂製電気絶縁性管
路１７を有し、この電気絶縁性管路１７を含むブロック
弁機構１８が配置された供給路２０が接続される。In FIG. 2, reference numeral 10 denotes an electrostatic coating apparatus for performing the electrostatic coating method according to the present invention. The electrostatic coating device 10 includes a grounded color changing valve mechanism 1.
2, a first cleaning valve 14 for controlling the supply of air (A), water (W), cleaning liquid (S), etc., and a conductive paint of a different color. A plurality of paint valves 16a to 16c are provided.
The color changing valve mechanism 12 includes at least a part of an electrically insulating pipe 17 made of resin such as polytetrafluoroethylene (PTFE), and a block valve mechanism 18 including the electrically insulating pipe 17 is arranged. Supply path 20 is connected.
【００１１】このブロック弁機構１８は、切換弁２２
ａ、２２ｂを備え、入口側の前記切換弁２２ａによって
前記色替弁機構１２と、エア（Ａ）、水（Ｗ）および洗
浄液（Ｓ）等の供給を制御する第２洗浄弁２４とが切り
換えられ、供給路２０を介して中間貯留槽２６に接続さ
れる。この中間貯留槽２６は、ピストン２８を介して分
割される導電性塗料および洗浄液の注入用第１シリンダ
室３０と、エア供給用第２シリンダ室３２とを備え、こ
の第２シリンダ室３２に、空気供給源３４が流量調整弁
３６、開閉弁３８を介して連通する。この空気供給源３
４は、ブースタ４０を経由してエア圧を調節するための
導電性塗料の流量調節器４２に接続され、この流量調節
器４２により導電性塗料の吐出量の制御が図られる。切
換弁２２ｂは、排出路４４を経由して廃液槽４６に接続
されている。The block valve mechanism 18 includes a switching valve 22
a, 22b, and the switching valve 22a on the inlet side switches between the color changing valve mechanism 12 and the second cleaning valve 24 for controlling the supply of air (A), water (W), cleaning liquid (S) and the like. And is connected to the intermediate storage tank 26 via the supply path 20. The intermediate storage tank 26 includes a first cylinder chamber 30 for injecting a conductive paint and a cleaning liquid, which is divided via a piston 28, and a second cylinder chamber 32 for supplying air. An air supply source 34 communicates via a flow control valve 36 and an on-off valve 38. This air supply source 3
Numeral 4 is connected to a conductive paint flow controller 42 for adjusting the air pressure via a booster 40, and the flow controller 42 controls the discharge amount of the conductive paint. The switching valve 22 b is connected to a waste liquid tank 46 via a discharge path 44.
【００１２】中間貯留槽２６の第１シリンダ室３０に
は、送出路４８を介して塗装ガン５０が接続される。図
１に示すように、この塗装ガン５０は、送出路４８に連
通する塗料用経路５２を備え、この塗料用経路５２にダ
ンプ弁５４とトリガ弁５６とが配置されるとともに、こ
のダンプ弁５４は、排出路５８を経由して廃液槽６０に
接続されている。A coating gun 50 is connected to the first cylinder chamber 30 of the intermediate storage tank 26 via a delivery path 48. As shown in FIG. 1, the coating gun 50 includes a paint path 52 communicating with the delivery path 48. In the paint path 52, a dump valve 54 and a trigger valve 56 are disposed. Are connected to a waste liquid tank 60 via a discharge path 58.
【００１３】この塗料用経路５２の外周を覆うようにし
て洗浄用経路６２が設けられ、この塗料用経路５２と洗
浄用経路６２とにより二重管が構成される。この洗浄用
経路６２は、エア（Ａ）、水（Ｗ）および洗浄液（Ｓ）
等の供給を制御する第３洗浄弁６３に接続されている
（図２参照）。A cleaning channel 62 is provided so as to cover the outer periphery of the coating channel 52, and the coating channel 52 and the cleaning channel 62 form a double pipe. The cleaning path 62 includes air (A), water (W), and a cleaning liquid (S).
Is connected to a third cleaning valve 63 for controlling the supply of the fluid (see FIG. 2).
【００１４】塗料用経路５２の端部５２ａと洗浄用経路
６２の端部６２ａとは、回転カップ（回転霧化頭）６４
内まで延在しており、この端部５２ａが、端部６２ａよ
りも前記回転カップ６４側に所定の長さだけ突出して構
成される。この回転カップ６４は、塗装ガン５０内に配
置されたモータ６６に連結されるとともに、キャップ部
材６８に囲繞されている。この塗装ガン５０内の導電性
塗料には、図示しない高電圧印加手段により所定の高電
圧が直接印加される。The end 52a of the paint path 52 and the end 62a of the cleaning path 62 are connected to a rotating cup (rotating atomizing head) 64.
The end portion 52a is configured to protrude from the end portion 62a toward the rotation cup 64 by a predetermined length. The rotating cup 64 is connected to a motor 66 disposed in the coating gun 50 and is surrounded by a cap member 68. A predetermined high voltage is directly applied to the conductive paint in the coating gun 50 by a high voltage application unit (not shown).
【００１５】次に、このように構成される静電塗装装置
１０の動作について、本実施例に係る静電塗装方法との
関連で、図３に示すタイミングチャートを参照しながら
説明する。Next, the operation of the electrostatic coating apparatus 10 thus configured will be described with reference to a timing chart shown in FIG. 3 in relation to the electrostatic coating method according to the present embodiment.
【００１６】まず色替弁機構１２の塗料弁１６ａから所
定の色の導電性塗料が圧送され、供給路２０を介して中
間貯留槽２６の第１シリンダ室３０に充填され、さらに
送出路４８を経由して塗装ガン５０まで充填される。こ
の充填時には、トリガ弁５６は閉塞される一方、ダンプ
弁５４は開放され、充填後にこのダンプ弁５４が閉成さ
れる。First, a conductive paint of a predetermined color is pressure-fed from the paint valve 16a of the color changing valve mechanism 12, is charged into the first cylinder chamber 30 of the intermediate storage tank 26 through the supply path 20, and is further supplied to the delivery path 48. The paint is then filled up to the coating gun 50. During this filling, the trigger valve 56 is closed while the dump valve 54 is opened, and after the filling, the dump valve 54 is closed.
【００１７】そこで、ブロック弁機構１８の切換弁２２
ａ、２２ｂの切り換え動作が行われると、第２洗浄弁２
４の駆動作用下に前記ブロック弁機構１８は洗浄され、
この洗浄に用いられた洗浄液および水は、排出路４４を
経由して廃液槽４６に排出される。そして、エアを介し
てブロック弁機構１８は乾燥され、これにより色替弁機
構１２と中間貯留槽２６とは、電気的に絶縁される。Therefore, the switching valve 22 of the block valve mechanism 18
a, 22b, the second cleaning valve 2
4, the block valve mechanism 18 is washed under the driving action of 4,
The cleaning liquid and water used for this cleaning are discharged to a waste liquid tank 46 via a discharge path 44. Then, the block valve mechanism 18 is dried via air, whereby the color changing valve mechanism 12 and the intermediate storage tank 26 are electrically insulated.
【００１８】次いで、空気供給源３４から流量調整弁３
６および開閉弁３８を介して中間貯留槽２６の第２シリ
ンダ室３２に駆動用エアが供給され、ピストン２８が第
１シリンダ室３０側に変位して、導電性塗料が、トリガ
弁５６の開成作用下に塗装ガン５０内の塗料用経路５２
を介して回転カップ６４に供給される。その際、モータ
６６の駆動作用下に回転カップ６４が高速回転される一
方、図示しない高電圧印加手段を介して塗装ガン５０内
の導電性塗料に高電圧が直接印加されており、このた
め、前記導電性塗料は、霧化状態で図示しない被塗装物
に噴霧されて静電塗装が行われる。Next, the flow control valve 3 is supplied from the air supply source 34.
Driving air is supplied to the second cylinder chamber 32 of the intermediate storage tank 26 via the valve 6 and the opening / closing valve 38, the piston 28 is displaced toward the first cylinder chamber 30, and the conductive paint is opened by the trigger valve 56. The paint path 52 in the paint gun 50 under operation
Is supplied to the rotating cup 64 via the At this time, while the rotating cup 64 is rotated at high speed under the driving action of the motor 66, a high voltage is directly applied to the conductive paint in the coating gun 50 via a high voltage applying means (not shown). The conductive paint is sprayed in an atomized state on a workpiece (not shown) to perform electrostatic coating.
【００１９】前記静電塗装終了後に高電圧印加が停止さ
れ、第３洗浄弁６３が駆動されて洗浄用経路６２に洗浄
液が供給される。この洗浄液は、洗浄用経路６２の端部
６２ａから回転カップ６４の内面に導出され、この回転
カップ６４の洗浄作業が、所定の時間だけ行われる。こ
のため、回転カップ６４に導電性塗料が付着して乾燥す
ることを有効に阻止することができる。After the completion of the electrostatic coating, application of the high voltage is stopped, and the third cleaning valve 63 is driven to supply the cleaning liquid to the cleaning path 62. The cleaning liquid is led out from the end 62a of the cleaning path 62 to the inner surface of the rotary cup 64, and the cleaning of the rotary cup 64 is performed for a predetermined time. Therefore, it is possible to effectively prevent the conductive paint from adhering to the rotating cup 64 and drying.
【００２０】洗浄終了後に、第３洗浄弁６３の作用下に
洗浄用経路６２に所定時間だけ所定の圧力のドライエア
が供給され、この洗浄用経路６２内に残存する洗浄液を
回転カップ６４から外部に排出させる。この場合、ドラ
イエアの圧力が、通常のエアブローに使用されるように
５〜１０（ｋｇ／ｃｍ2 ）に設定されると、洗浄液の排
出量が、２０００（ｃｃ／ｍｉｎ）以上と大きくなる。
ところが、回転カップ６４から導出可能な洗浄液の量
は、３００〜７００（ｃｃ）程度であり、この回転カッ
プ６４から外部に導出されない洗浄液は、高圧を付与さ
れた状態で、例えばモータ６６の図示しないタービン内
に逆流するおそれがある。この結果、タービンが所定の
回転数で回転できなくなり、最悪の場合に回転不能とな
るという問題がある。After the cleaning is completed, dry air of a predetermined pressure is supplied to the cleaning path 62 for a predetermined time under the action of the third cleaning valve 63, and the cleaning liquid remaining in the cleaning path 62 is discharged from the rotating cup 64 to the outside. Let it drain. In this case, when the pressure of the dry air is set to 5 to 10 (kg / cm 2 ) so as to be used for normal air blowing, the discharge amount of the cleaning liquid becomes as large as 2000 (cc / min) or more.
However, the amount of the cleaning liquid that can be discharged from the rotating cup 64 is about 300 to 700 (cc), and the cleaning liquid that is not discharged to the outside from the rotating cup 64 is, for example, a motor 66 not shown in a high pressure applied state. There is a risk of backflow into the turbine. As a result, there is a problem that the turbine cannot rotate at a predetermined rotation speed, and cannot rotate at worst.
【００２１】そこで、本実施例では、０．２〜０．７
（ｋｇ／ｃｍ2 ）程度の比較的低圧のドライエアで洗浄
用経路６２内の洗浄液の排出作業を行うことにより、こ
の洗浄用経路６２に残存する洗浄液を、円滑かつ確実に
回転カップ６４から外部に導出させることができるとい
う効果が得られる。Therefore, in this embodiment, 0.2 to 0.7
By performing the operation of discharging the cleaning liquid in the cleaning path 62 with relatively low-pressure dry air of about (kg / cm 2 ), the cleaning liquid remaining in the cleaning path 62 is smoothly and reliably discharged from the rotating cup 64 to the outside. The effect of being able to derive is obtained.
【００２２】次いで、５〜７（ｋｇ／ｃｍ2 ）程度のド
ライエアが、洗浄用経路６２内に供給されてこの洗浄用
経路６２内が乾燥され、その後、次なる静電塗装作業
が、前述した手順により行われる。Next, dry air of about 5 to 7 (kg / cm 2 ) is supplied into the cleaning path 62 to dry the inside of the cleaning path 62, and then the next electrostatic coating operation is performed as described above. It is performed according to the procedure.
【００２３】このように、洗浄用経路６２に供給される
洗浄液により回転カップ６４が洗浄された後に、この洗
浄用経路６２にドライエアが供給されて前記洗浄用経路
６２内が乾燥される。従って、塗料用経路５２に供給さ
れた導電性塗料に高電圧が直接印加される際に、洗浄用
経路６２を通じて漏電することを有効に阻止することが
できる。これによって、塗料用経路５２内の導電性塗料
に所定の高電圧を確実に印加することが可能になり、回
転カップ６４の回転作用下に被塗装物（図示せず）に対
して高精度かつ効率的な静電塗装作業を遂行することが
できるという効果が得られる。また、洗浄用経路６２内
に残存する洗浄液が外部に排出された後に、ドライエア
の供給圧力を比較的高圧に設定することにより、この洗
浄用経路６２の乾燥時間を容易に短縮することが可能に
なる。After the rotating cup 64 is cleaned by the cleaning liquid supplied to the cleaning path 62, dry air is supplied to the cleaning path 62 to dry the inside of the cleaning path 62. Therefore, when a high voltage is directly applied to the conductive paint supplied to the paint passage 52, it is possible to effectively prevent a leakage through the washing passage 62. As a result, it is possible to reliably apply a predetermined high voltage to the conductive paint in the paint path 52, and to apply a high-accuracy and high-precision object (not shown) under the rotation of the rotating cup 64. An effect is obtained that an efficient electrostatic coating operation can be performed. Also, by setting the supply pressure of the dry air to a relatively high pressure after the cleaning liquid remaining in the cleaning path 62 is discharged to the outside, the drying time of the cleaning path 62 can be easily reduced. Become.
【００２４】[0024]
【発明の効果】本発明に係る静電塗装方法によれば、以
下の効果が得られる。According to the electrostatic coating method of the present invention, the following effects can be obtained.
【００２５】静電塗装終了後に洗浄用経路を介して回転
霧化頭に洗浄液が供給されてこの回転霧化頭が洗浄され
た後に、前記洗浄用経路が乾燥されるため、次なる静電
塗装作業を行うべく導電性塗料に高電圧が直接印加され
る際に、この洗浄用経路を通じて漏電することを阻止で
きる。しかも、前記洗浄後に、まず比較的低圧のエアに
より洗浄用経路内に残存する洗浄液を外部に排出するた
め、高圧エアを使用する際のように前記残存洗浄液が、
回転霧化頭から外部に導出されず、例えばモータのター
ビン内に逆流する等のおそれがない。これにより、所定
の高電圧を確実に確保して、高精度かつ効率的な静電塗
装作業が可能になる。After the completion of the electrostatic coating, a cleaning liquid is supplied to the rotary atomizing head via the cleaning path, and after the rotary atomizing head is cleaned, the cleaning path is dried. When a high voltage is directly applied to the conductive paint to perform the operation, it is possible to prevent the leakage through this cleaning path. Moreover, after the cleaning, first, the cleaning liquid remaining in the cleaning path is discharged to the outside by relatively low-pressure air, so that the remaining cleaning liquid is used as in the case of using high-pressure air.
There is no danger of being drawn out from the rotary atomizing head to the outside, for example, backflow into the turbine of the motor. As a result, a predetermined high voltage is reliably secured, and a highly accurate and efficient electrostatic coating operation can be performed.
【図１】本発明に係る静電塗装方法を実施するための静
電塗装装置を構成する塗装ガンの一部省略縦断説明図で
ある。FIG. 1 is a longitudinal sectional view partially omitted of a coating gun constituting an electrostatic coating apparatus for carrying out an electrostatic coating method according to the present invention.
【図２】前記静電塗装装置の概略構成図である。FIG. 2 is a schematic configuration diagram of the electrostatic coating device.
【図３】前記静電塗装方法のタイミングチャートであ
る。FIG. 3 is a timing chart of the electrostatic coating method.
１０…静電塗装装置 １２…色替弁機構 １８…ブロック弁機構 ２６…中間貯留槽 ４８…送出路 ５０…塗装ガン ５２…塗料用経路 ５４…ダンプ弁 ５６…トリガ弁 ６２…洗浄用経路 ６３…洗浄弁 ６４…回転カップ DESCRIPTION OF SYMBOLS 10 ... Electrostatic coating apparatus 12 ... Color change valve mechanism 18 ... Block valve mechanism 26 ... Intermediate storage tank 48 ... Discharge path 50 ... Coating gun 52 ... Paint path 54 ... Dump valve 56 ... Trigger valve 62 ... Cleaning path 63 ... Cleaning valve 64 ... Rotating cup
───────────────────────────────────────────────────── フロントページの続き (72)発明者 外山 弐一 埼玉県狭山市新狭山１−10−１ ホンダ エンジニアリング株式会社内 (72)発明者 新井 弘 埼玉県狭山市新狭山１−10−１ ホンダ エンジニアリング株式会社内 (72)発明者 石橋 一郎 埼玉県狭山市新狭山１−10−１ ホンダ エンジニアリング株式会社内 (56)参考文献 特開 昭61−46279（ＪＰ，Ａ) 特公 昭60−14623（ＪＰ，Ｂ２) ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Niichi Toyama 1-10-1 Shinsayama, Sayama City, Saitama Prefecture Inside Honda Engineering Co., Ltd. (72) Inventor Hiroshi Arai 1-10-1 Shinsayama, Sayama City, Saitama Honda Engineering Co., Ltd. (72) Inventor Ichiro Ishibashi 1-10-1 Shinsayama, Sayama City, Saitama Prefecture Honda Engineering Co., Ltd. (56) References JP-A-61-46279 (JP, A) JP-B-60-14623 ( JP, B2)
Claims (1)
料供給経路を介して回転霧化式塗装ガンに供給し、該回
転霧化式塗装ガンから被塗装物に噴霧して静電塗装を施
す過程と、 前記静電塗装終了後に前記塗料供給経路とは個別に設け
られた回転霧化頭洗浄用経路を介して該回転霧化頭に洗
浄液を供給し、前記回転霧化頭を洗浄する過程と、 前記洗浄終了後に前記回転霧化頭洗浄用経路内に、洗浄
液の排出量が前記回転霧化頭から導出可能な量になるよ
うに設定された圧力のエアを供給して前記回転霧化頭洗
浄用経路内に残存する洗浄液を排出させる過程と、 前記回転霧化頭洗浄用経路内に、前記圧力よりも高圧の
エアを供給して前記回転霧化頭洗浄用経路を乾燥させる
過程と、 前記乾燥終了後に次なる静電塗装作業を遂行する過程と
を有することを特徴とする静電塗装方法。The method according to claim 1 conductive coating to which a high voltage is applied directly, the coating
Charge supply path and supplied to the rotary atomization type spray gun through the steps of applying electrostatic coating sprayed onto the object to be coated from the times <br/> Utatekiri-expression spray gun, after the electrostatic coating ends Provided separately from the paint supply path
Supplying a cleaning liquid to the rotary atomizing head through the provided rotary atomizing head cleaning path, and cleaning the rotary atomizing head ;
The amount of liquid discharged will be an amount that can be derived from the rotary atomization head
A step of discharging the cleaning liquid remaining in the sea urchin set in the rotary atomizing head washing <br/> Kiyoshiyo path to supply air pressure to said rotary atomizing head washing path, than the pressure An electrostatic coating method, comprising: supplying high-pressure air to dry the rotary atomizing head cleaning path; and performing a next electrostatic coating operation after the drying is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3137682A JP2790153B2 (en) | 1991-06-10 | 1991-06-10 | Electrostatic coating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3137682A JP2790153B2 (en) | 1991-06-10 | 1991-06-10 | Electrostatic coating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04363171A JPH04363171A (en) | 1992-12-16 |
| JP2790153B2 true JP2790153B2 (en) | 1998-08-27 |
Family
ID=15204351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3137682A Expired - Fee Related JP2790153B2 (en) | 1991-06-10 | 1991-06-10 | Electrostatic coating method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2790153B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6630025B2 (en) | 2000-03-15 | 2003-10-07 | Nissan Motor Co., Ltd. | Coating apparatus |
| US9427753B2 (en) | 2007-05-02 | 2016-08-30 | Ransburg Industrial Finishing K.K. | Rotary atomizer |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4848322B2 (en) * | 2007-06-28 | 2011-12-28 | トリニティ工業株式会社 | Water-based paint atomization coating system |
| JP5762021B2 (en) | 2011-01-31 | 2015-08-12 | 三菱電機株式会社 | Engine knock control device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6014623A (en) * | 1983-07-01 | 1985-01-25 | Nippon Denso Co Ltd | Shaft coupling device |
| JPS6146279A (en) * | 1984-08-10 | 1986-03-06 | Trinity Ind Corp | Washing method for color change in multicolor electrostatic painting apparatus |
-
1991
- 1991-06-10 JP JP3137682A patent/JP2790153B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6630025B2 (en) | 2000-03-15 | 2003-10-07 | Nissan Motor Co., Ltd. | Coating apparatus |
| US9427753B2 (en) | 2007-05-02 | 2016-08-30 | Ransburg Industrial Finishing K.K. | Rotary atomizer |
| US9427754B2 (en) | 2007-05-02 | 2016-08-30 | Ransburg Industrial Finishing K.K. | Rotary atomizer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04363171A (en) | 1992-12-16 |
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