JP2866192B2 - Electrostatic coating equipment for conductive paint - Google Patents
Electrostatic coating equipment for conductive paintInfo
- Publication number
- JP2866192B2 JP2866192B2 JP2330210A JP33021090A JP2866192B2 JP 2866192 B2 JP2866192 B2 JP 2866192B2 JP 2330210 A JP2330210 A JP 2330210A JP 33021090 A JP33021090 A JP 33021090A JP 2866192 B2 JP2866192 B2 JP 2866192B2
- Authority
- JP
- Japan
- Prior art keywords
- paint
- cleaning liquid
- electrostatic coating
- valve
- coating machine
- 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
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- Electrostatic Spraying Apparatus (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、高電圧が印加された静電塗装機によって水
性塗料やスラリー塗料、メタリック塗料等の導電性塗料
を塗装する静電塗装装置に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostatic coating apparatus for applying a conductive paint such as a water-based paint, a slurry paint, and a metallic paint by an electrostatic paint machine to which a high voltage is applied. .
高電圧が印加された静電塗装機によって水性塗料等の
導電性塗料を塗装する場合は、静電塗装機に印加した高
電圧のリークを防止するために、その塗装機の塗料供給
系に絶縁対策を施す必要があるから（特開昭55−114366
号，同56−141869号公報）、数十色もの塗料を色替して
塗装する自動車塗装用の多色静電塗装装置にあっては、
各色の塗料ごとに夫々その塗料供給配管や塗料タンク等
を絶縁しなければならないという面倒がある。When a conductive paint such as a water-based paint is applied by an electrostatic coating machine to which a high voltage is applied, insulate the paint supply system of the coating machine to prevent leakage of the high voltage applied to the electrostatic coating machine. It is necessary to take countermeasures (Japanese Patent Laid-Open No. 55-114366)
No. 56-141869), a multi-color electrostatic coating apparatus for automotive painting, in which dozens of colors of paint are changed and painted.
There is a trouble that the paint supply pipe, the paint tank and the like must be insulated for each paint of each color.
このため、自動車塗装においては、有害な有機溶剤を
大量に消費する絶縁性樹脂塗料による静電塗装が未だ主
流を占め、無公害な水性塗料の使用を見合わせているの
が実情である。For this reason, in automotive painting, electrostatic painting with an insulating resin paint that consumes a large amount of harmful organic solvents still occupies the mainstream, and the fact is that the use of non-polluting water-based paint is forgotten.
しかし、最近では、世界的な環境保全運動が高まり、
塗装業界においてもハイドロカーボン等の公害物質を生
ずる有機溶剤の使用規制が叫ばれている。However, recently, global environmental protection movements have been growing,
The use of organic solvents that generate pollutants such as hydrocarbons has also been called for in the coatings industry.
そこで本発明は、水性塗料による塗装を推奨するため
に、水性塗料等の導電性塗料による静電塗装を行う場合
でも、その塗料供給配管や塗料タンク等の塗料供給系に
面倒な絶縁対策を施さなくても済むようにすることを主
たる技術的課題とし、また、導電性塗料による多色塗装
を行う際の色替時間も短縮できるようにすることを技術
的課題としている。Therefore, in order to recommend coating with a water-based paint, the present invention has taken troublesome insulation measures in a paint supply system such as a paint supply pipe and a paint tank even when performing electrostatic coating with a conductive paint such as a water-based paint. The main technical problem is to eliminate the necessity, and it is also a technical problem to shorten the color change time when performing multi-color coating with a conductive paint.
これらの課題を解決するために、本発明は、高電圧が
印加された静電塗装機で導電性塗料を塗装する導電性塗
料の静電塗装装置において、夫々の色替バルブ装置によ
り選択された任意の色の導電性塗料を塗料流入口から導
入し塗料吐出口から所定の流量で圧し出して交互に供給
する複数のポンプが、静電塗装機側とドレン配管側の二
方向流出路を備えた切換バルブを介して静電塗装機に接
続されると共に、当該各ポンプと、各ポンプ内に洗浄液
を直接供給する洗浄液タンクと、各ポンプから排出され
た洗浄液を回収する排液タンクとが、夫々電気的絶縁状
態で設置されて成り、前記切換バルブと静電塗装機に洗
浄液を供給する洗浄液供給バルブが、塗料ホースを介し
て静電塗装機に接続されたマニホールドに装着されると
共に、前記切換バルブは前記ドレン配管を介して前記排
液タンクに接続され、前記色替バルブ装置から塗料を送
給する各塗料供給配管と前記各ポンプの塗料流入口は、
離れた位置から互いに係合する位置まで進退可能に配設
されたカプラーを介して係脱自在に連結されると共に、
前記塗料供給配管には前記色替バルブ装置から送給され
た洗浄液を排出するダンプバルブが介装され、前記塗料
流入口には前記洗浄液タンクから各ポンプに送給された
洗浄液を前記排液タンクに排出するダンプバルブが介装
されたことを特徴とする。In order to solve these problems, the present invention has been selected by each color changing valve device in a conductive paint electrostatic coating apparatus for coating a conductive paint with a high voltage applied electrostatic paint machine. A plurality of pumps that introduce conductive paint of any color from the paint inlet, press out the paint at a predetermined flow rate from the paint discharge port, and supply them alternately, have two-way outflow paths on the electrostatic coating machine side and the drain pipe side. Connected to the electrostatic coating machine via the switching valve, the pumps, a cleaning liquid tank for directly supplying a cleaning liquid into each pump, and a drainage tank for collecting the cleaning liquid discharged from each pump, The switching valve and the cleaning liquid supply valve for supplying a cleaning liquid to the electrostatic coating machine are mounted on a manifold connected to the electrostatic coating machine via a paint hose, respectively, and Switching valve Is connected to said the drainage tank through the drain pipe, the color changing delivering paint from the valve device paint inlet of each pump and each paint supply pipe,
Along with being detachably connected via a coupler arranged to be able to advance and retreat from a distant position to a position where they are engaged with each other,
The paint supply pipe is provided with a dump valve for discharging the cleaning liquid supplied from the color changing valve device, and the paint inlet is provided with a cleaning liquid supplied to each pump from the cleaning liquid tank to the drain tank. And a dump valve for discharging the oil is interposed.
本発明によれば、静電塗装機に高電圧が印加されてい
ない間に、各ポンプの塗料流入口に夫々塗料供給配管を
連結されて、当該塗料供給配管を通じて各ポンプ内に導
電性塗料を導入する。According to the present invention, while a high voltage is not applied to the electrostatic coating machine, a paint supply pipe is connected to the paint inlet of each pump, and the conductive paint is supplied into each pump through the paint supply pipe. Introduce.
そして、一つのポンプ内に塗装に必要な所要量の導電
性塗料が充填されると、各ポンプの塗料流入口から塗料
供給配管を離脱させる。When the required amount of the conductive paint required for painting is filled in one pump, the paint supply pipe is separated from the paint inlet of each pump.
この状態で、静電塗装機に所定の高電圧を印加すると
共に、導電性塗料が充填されたポンプからその導電性塗
料を所定の流量で圧し出して静電塗装機に定量供給す
る。In this state, a predetermined high voltage is applied to the electrostatic coating machine, and the conductive coating is pumped out at a predetermined flow rate from a pump filled with the conductive coating and supplied to the electrostatic coating machine in a constant amount.
このとき、塗料供給配管は各ポンプから離脱して、静
電塗装機と隔絶されているので、当該静電塗装機に印加
した高電圧が各ポンプを通じて導電性塗料の塗料供給系
にリークすることがない。At this time, since the paint supply pipe separates from each pump and is isolated from the electrostatic coating machine, high voltage applied to the electrostatic coating machine leaks to the paint supply system of the conductive paint through each pump. There is no.
したがって、その塗料供給系全体に面倒な絶縁対策を
施す必要がなくなる。Therefore, it is not necessary to take troublesome insulation measures for the entire paint supply system.
また、一つのポンプから高電圧を印加した静電塗装機
に導電性塗料を定量供給して静電塗装を行っている間で
も、他のポンプ内に残存する導電性塗料を電気的絶縁状
態で設置された洗浄液タンクから直接供給される洗浄液
で洗浄除去して、同じく電気的絶縁状態で設置された排
液タンクに排出することができる。In addition, even while conducting the electrostatic coating by supplying a constant amount of conductive paint to the electrostatic coating machine to which a high voltage is applied from one pump, the conductive paint remaining in the other pump is electrically insulated. It can be washed and removed with the cleaning liquid directly supplied from the installed cleaning liquid tank, and can be discharged to the drain tank also installed in an electrically insulated state.
したがって、次なる塗装を開始するまでのインターバ
ルを短くすることができ、多色静電塗装装置にあっては
塗料の色替時間が短縮される。Therefore, the interval until the start of the next coating can be shortened, and in the case of the multicolor electrostatic coating apparatus, the color change time of the coating is reduced.
以下、本発明の実施例を図面に基づいて具体的に説明
する。Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.
第１図は本発明による静電塗装装置の一例を示すフロ
ーシート図、第２図はその動作を示すタイムチャート図
である。FIG. 1 is a flow sheet diagram showing an example of the electrostatic coating apparatus according to the present invention, and FIG. 2 is a time chart showing the operation thereof.
本例では、80〜120KVの高電圧が印加される静電塗装
機１に導電性塗料を交互に定量供給する二台のポンプ2
A,2Bが、絶縁碍子などの周知の絶縁手段により電気的絶
縁状態で設置されている。In this example, two pumps 2 for alternately supplying a constant amount of a conductive paint to an electrostatic coating machine 1 to which a high voltage of 80 to 120 KV is applied.
A and 2B are installed in an electrically insulated state by a known insulating means such as an insulator.
各ポンプ2A,2Bは、夫々の塗料供給配管３に連結され
る塗料流入口４からシリンダ５内に導入された所要量の
導電性塗料を、モータやシリンダ等の駆動装置６によっ
て往復運動せられる絶縁シャフト７の先端に取り付けた
ピストン８で塗料吐出口９から所定の流量で圧し出すよ
うになっている。Each of the pumps 2A and 2B can reciprocate a required amount of conductive paint introduced into the cylinder 5 from the paint inlet 4 connected to the respective paint supply pipes 3 by a drive device 6 such as a motor or a cylinder. The piston 8 attached to the tip of the insulating shaft 7 presses out the paint from the paint discharge port 9 at a predetermined flow rate.
そして、各ポンプ2A,2Bの塗料吐出口９は、静電塗装
機１の塗料ホース10に連なるマニホールド11に設けた各
切換バルブ12,13に連結されている。The paint discharge ports 9 of the pumps 2A and 2B are connected to switching valves 12 and 13 provided on a manifold 11 connected to a paint hose 10 of the electrostatic coating machine 1.
一方、各ポンプ2A,2Bの塗料流入口４には、その先端
に塗料供給配管３を係脱自在に連結するための雌形カプ
ラー14が設けられると共に、後述する排液タンク45に洗
浄液等を排出するダンプバルブ15が介装されている。On the other hand, the paint inlet 4 of each of the pumps 2A and 2B is provided with a female coupler 14 at its tip for connecting and disconnecting the paint supply pipe 3 in a detachable manner. A dump valve 15 for discharging is interposed.
また、各ポンプ2A,2Bのシリンダ５には、絶縁碍子な
どの周知の絶縁手段により電気的絶縁状態で設置された
洗浄液タンク16から高圧洗浄液を直接供給する配管17
と、洗浄空気供給源18から高圧洗浄空気を直接供給する
配管19が、バルブ20の切換操作によって交互に接続可能
に成されている。A pipe 17 for directly supplying a high-pressure cleaning liquid from a cleaning liquid tank 16 installed in an electrically insulated state by a well-known insulating means such as an insulator is connected to the cylinder 5 of each of the pumps 2A and 2B.
And a pipe 19 for directly supplying high-pressure cleaning air from a cleaning air supply source 18 can be connected alternately by switching a valve 20.
次に、各塗料供給配管３の先端には、夫々各ポンプ2
A,2Bの塗料流入口４に設けた雌形カプラー14に対して係
脱自在に嵌合する雄形カプラー21が設けられると共に、
後述する廃液処理設備55に洗浄液等を排出するダンプバ
ルブ22が介装され、雄形カプラー21がエアシリンダ23の
ピストンロッド24に固定されて、該ピストンロッド24の
伸縮により雌形カプラー21に対して進退せられるように
なっている。なお、雌形カプラー14と雄形カプラー21
は、互いに嵌合した時に開放される逆止弁構造になって
いる。Next, at the tip of each paint supply pipe 3, each pump 2
A and 2B are provided with a male coupler 21 which is removably fitted to the female coupler 14 provided at the paint inlet 4 and
A dump valve 22 for discharging a washing liquid or the like is interposed in a waste liquid treatment facility 55 described later, and the male coupler 21 is fixed to a piston rod 24 of an air cylinder 23, and the piston rod 24 expands and contracts to the female coupler 21. To be able to advance and retreat. The female coupler 14 and the male coupler 21
Have a check valve structure that is opened when fitted together.
また、各塗料供給配管３の後端には、夫々各色の導電
性塗料を同一の配色で供給する複数の色替バルブCV1〜C
V3と、高圧洗浄液供給バルブCVW及び高圧洗浄空気供給
バルブCVAを有した一対の色替バルブ装置25A,25Bが連結
されている。Further, the rear end of the paint supply pipe 3, a plurality of color change valve CV 1 -C supplying respective different colors of conductive coating in the same color
And V 3, a pair of color change valve device 25A having the high-pressure cleaning liquid supply valve CV W and the high-pressure cleaning air feed valve CV A, 25B are connected.
次に、電気的絶縁状態で設置された洗浄液タンク16に
は、そのタンク内の洗浄液を配管17を通じて各ポンプ2
A,2Bに圧送するために高圧空気供給源26から高圧空気を
供給する配管27が連結されると共に、そのタンク内に洗
浄液を補給するための補給口28が設けられ、当該補給口
28の先端側に雌形カプラー29が取り付けられている。Next, the cleaning liquid in the cleaning liquid tank 16 installed in an electrically insulated state is supplied to each pump 2 through a pipe 17.
A pipe 27 for supplying high-pressure air from a high-pressure air supply source 26 for feeding to A and 2B is connected, and a replenishing port 28 for replenishing the cleaning liquid in the tank is provided.
A female coupler 29 is attached to the tip side of 28.
そして、洗浄液供給源30から補給用の洗浄液を供給す
る配管31の先端に取り付けられた雄形カプラー32が、エ
アシリンダ33のピストンロッド34に固定されて、雌形カ
プラー29に対して係脱自在に嵌合する方向に進退せられ
るようになっている。A male coupler 32 attached to the end of a pipe 31 for supplying a supply of cleaning liquid from a cleaning liquid supply source 30 is fixed to a piston rod 34 of an air cylinder 33 and is detachable from a female coupler 29. Can be advanced and retracted in the direction of fitting.
次に、静電塗装機１の塗料ホース10に連結されたマニ
ホールド11には、各ポンプ2A,2Bから圧し出される導電
性塗料を静電塗装機１に対して交互に供給するため切換
バルブ12,13が双方とも閉鎖された時に、そのマニホー
ルド11内から塗料ホース10内を通じて静電塗装機１に低
圧洗浄空気と低圧洗浄液を供給する洗浄空気供給バルブ
35と洗浄液供給バルブ36が付設されている。Next, a switching valve 12 is connected to a manifold 11 connected to a paint hose 10 of the electrostatic coating machine 1 so as to alternately supply conductive paint pressed out from each of the pumps 2A and 2B to the electrostatic coating machine 1. , 13 are both closed, a cleaning air supply valve for supplying low pressure cleaning air and a low pressure cleaning liquid to the electrostatic coating machine 1 from inside the manifold 11 through the paint hose 10.
35 and a cleaning liquid supply valve 36 are provided.
なお、洗浄空気供給バルブ35は、絶縁性の配管37を介
して低圧空気供給源38に直結され、また、洗浄液供給バ
ルブ36には、低圧洗浄液供給源39から低圧洗浄液を供給
する配管40の先端に設けられてエアシリンダ41のピスト
ンロッド42で進退せられる雄形カプラー43と係脱自在に
嵌合する雌形カプラー44が設けられている。The cleaning air supply valve 35 is directly connected to a low-pressure air supply source 38 via an insulating pipe 37, and the cleaning liquid supply valve 36 has a distal end of a pipe 40 for supplying a low-pressure cleaning liquid from the low-pressure cleaning liquid supply source 39. And a female coupler 44 which is removably fitted to a male coupler 43 which is provided on the air cylinder 41 and which is reciprocated by a piston rod 42 of an air cylinder 41.
また、マニホールド11に設けられた切換バルブ12,13
は、各ポンプ2A,2Bの塗料吐出口９を夫々静電塗装機１
側と排液タンク45側とに切換接続する二方向の流出路を
有している。Further, switching valves 12 and 13 provided in the manifold 11 are provided.
The paint discharge port 9 of each pump 2A, 2B is connected to the electrostatic coating machine 1 respectively.
It has a two-way outflow path for switching connection between the side and the drain tank 45 side.
次に、排液タンク45は、洗浄液タンク16と同様に絶縁
碍子などの周知の絶縁手段により電気的絶縁状態で設置
されて、塗料の洗浄に供された洗浄液を回収するドレン
配管46と、当該ドレン配管46を通じて回収した洗浄液を
排水口47から圧し出す高圧空気供給源48に接続した配管
49が連結されている。Next, the drainage tank 45 is installed in a state of being electrically insulated by a well-known insulating means such as an insulator like the cleaning liquid tank 16, and a drain pipe 46 for collecting the cleaning liquid used for cleaning the paint, A pipe connected to a high-pressure air supply source 48 that presses out the cleaning liquid collected through a drain pipe 46 from a drain port 47.
49 are connected.
そして、排水口47の先端には、雌形カプラー50が設け
られ、当該雌形カプラー50に対して排液配管51の先端に
設けた雄形カプラー52がエアシリンダ53のピストンロッ
ド54で係脱自在に嵌合されて、排液タンク45内に回収し
た洗浄液等が排水口47から廃液配管51を通じて廃液処理
設備55に送出されるようになっている。A female coupler 50 is provided at the tip of the drain port 47, and a male coupler 52 provided at the tip of the drainage pipe 51 with respect to the female coupler 50 is disengaged by a piston rod 54 of an air cylinder 53. The cleaning liquid and the like collected in the drainage tank 45 are freely fitted, and are sent from the drainage port 47 to the wastewater treatment equipment 55 through the wastewater pipe 51.
以上が、第１図に示す静電塗装装置の構成であり、次
に、その動作について第２図を伴って説明する。The above is the configuration of the electrostatic coating apparatus shown in FIG. 1. Next, the operation thereof will be described with reference to FIG.
一方のポンプ2Aのシリンダ５内に充填された導電性塗
料による塗装が終了して静電塗装機１への高電圧の印加
が停止されると、第１図に示す状態から、他方のポンプ
2Bの塗料流入口４に設けられた雌形カプラー14に対し
て、色替バルブ装置25Bに連なる塗料供給配管３の先端
に設けた雄形カプラー21をエアシリンダ23で嵌合させ
て、ポンプ2Bの塗料流入口４に塗料供給配管３を連結す
る。When the coating with the conductive paint filled in the cylinder 5 of one pump 2A is completed and the application of the high voltage to the electrostatic coating machine 1 is stopped, the state shown in FIG.
The male coupler 21 provided at the tip of the paint supply pipe 3 connected to the color changing valve device 25B is fitted to the female coupler 14 provided at the paint inlet 4 of 2B by an air cylinder 23, and the pump 2B The paint supply pipe 3 is connected to the paint inflow port 4.
そして、例えば、色替バルブ装置25Bの色替バルブCV1
から次なる塗装に供する導電性塗料を供給開始すると共
に、ポンプ2Bのシリンダ５内に設けたピストン８をその
駆動装置６で後退させて、当該シリンダ５内に前記導電
性塗料を導入させる。Then, for example, the color change valve CV 1 of the color change valve device 25B
Then, the supply of the conductive paint to be applied to the next coating is started, and at the same time, the piston 8 provided in the cylinder 5 of the pump 2B is retracted by the driving device 6 so that the conductive paint is introduced into the cylinder 5.
また、これと並行して、マニホールド11に設けた洗浄
液供給バルブ36の雌形カプラー44に対して、洗浄液供給
源39に連なる配管40の先端に設けられた雄形カプラー43
をエアシリンダ41で嵌合させ、同じくマニホールド11に
設けた洗浄空気供給バルブ35と前記洗浄液供給バルブ36
とを交互に開閉して、洗浄空気供給源38と洗浄液供給源
39から供給される低圧洗浄空気と低圧洗浄液で、マニホ
ールド11内から塗料ホース10内と静電塗装機１内に残存
する塗料を当該静電塗装機１から吐出させて洗浄除去す
る。In parallel with this, the female coupler 44 of the cleaning liquid supply valve 36 provided in the manifold 11 is connected to the male coupler 43 provided at the tip of the pipe 40 connected to the cleaning liquid supply source 39.
Are fitted by an air cylinder 41, and the cleaning air supply valve 35 and the cleaning liquid supply valve 36, which are also provided on the manifold 11, are provided.
And the cleaning air supply source 38 and the cleaning liquid supply source
With the low-pressure cleaning air and the low-pressure cleaning liquid supplied from 39, the paint remaining in the paint hose 10 and the electrostatic coating machine 1 from the manifold 11 is discharged from the electrostatic coating machine 1 for cleaning and removal.
なお、この洗浄は、低圧の洗浄空気と洗浄液で行われ
るから、静電塗装機１から吐出する塗料や洗浄液が飛び
散って周辺環境を汚染する心配はない。Since this cleaning is performed using low-pressure cleaning air and a cleaning liquid, there is no concern that the paint or cleaning liquid discharged from the electrostatic coating machine 1 scatters and contaminates the surrounding environment.
そして、この洗浄が終了し、且つポンプ2Bのシリンダ
５内に所要量の導電性塗料が充填されると、洗浄液供給
バルブ36に設けた雌形カプラー44から洗浄液供給源39の
配管40に設けた雄形カプラー43を離脱させ、また、色替
バルブ装置25Bの色替バルブCV1を閉じて導電性塗料の供
給を停止し、ポンプ2Bの塗料流入口４に設けた雌形カプ
ラー14から塗料供給配管３に設けた雄形カプラー21を離
脱させて、その塗料流入口４と塗料供給配管３を切り離
すと共に、ポンプ2Bの塗料吐出口９に連結した切換バル
ブ13を開けて、その塗料吐出口９を静電塗装機１側に接
続する。When the cleaning is completed and the required amount of the conductive paint is filled in the cylinder 5 of the pump 2B, the cleaning liquid is supplied from the female coupler 44 provided in the cleaning liquid supply valve 36 to the pipe 40 of the cleaning liquid supply source 39. disengages the male coupler 43, also stops the supply of the conductive coating material by closing the color change valve CV 1 of the color changing valve apparatus 25B, paint supply from female coupler 14 provided on the coating inlet 4 of the pump 2B The male coupler 21 provided in the pipe 3 is detached, the paint inlet 4 and the paint supply pipe 3 are disconnected, and the switching valve 13 connected to the paint outlet 9 of the pump 2B is opened to open the paint outlet 9. Is connected to the electrostatic coating machine 1 side.
次いで、静電塗装機１に再び所定の高電圧を印加する
と共に、ポンプ2Bのシリンダ５内に設けたピストン５を
駆動装置６で前進させ、当該シリンダ５内に充填された
導電性塗料を静電塗装機１の塗料吐出量に応じた所定の
流量で圧し出してその静電塗装機１に定量供給し、静電
塗装を開始する。Next, a predetermined high voltage is again applied to the electrostatic coating machine 1 and the piston 5 provided in the cylinder 5 of the pump 2B is advanced by the driving device 6 to remove the conductive paint filled in the cylinder 5 statically. Pressure is applied at a predetermined flow rate according to the amount of paint discharged from the electrocoating machine 1 and is supplied to the electrostatic coating machine 1 in a constant amount to start electrostatic coating.
このとき、各ポンプ2A,2Bと、その塗料供給系を成す
各塗料供給配管３及び各色替バルブ装置25A,25Bとは、
互いに隔絶されて電気的に絶縁された状態にあるから、
静電塗装機１に印加した高電圧が塗料供給系にリークす
るおそれはない。At this time, each of the pumps 2A and 2B, each of the paint supply pipes 3 and each of the color changing valve devices 25A and 25B forming the paint supply system,
Because they are isolated from each other and electrically isolated,
There is no possibility that the high voltage applied to the electrostatic coating machine 1 leaks to the paint supply system.
したがって、色替バルブ装置25A,25Bの各色替バルブC
V1〜CV3に夫々各色の塗料供給源から導電性塗料を供給
する配管を含めた塗料供給系の全てに絶縁対策を施す面
倒がない。Therefore, each color change valve C of the color change valve devices 25A and 25B
V 1 to ～CV 3 no troublesome to all the respective colors paint supply source of the coating material supply system including a pipe for supplying conductive paint applying insulation measures.
そして、上記のようにポンプ2Bから静電塗装機１に供
給される導電性塗料で塗装を行う間に、ポンプ2Aの塗料
流入口４に介装されたダンプバルブ15を開けて、その塗
料流入口４を排液タンク45に連結されたドレン配管46に
接続すると共に、マニホールド11に設けられた切換バル
ブ12の流路も排液タンク45に連結したドレン配管46側に
切り換えて、ポンプ2A側に設けたバルブ20を開け、当該
バルブ20の切換操作により洗浄空気供給源18と洗浄液タ
ンク16から夫々高圧洗浄空気と高圧洗浄液をポンプ2Aの
シリンダ５内に交互に供給し、当該シリンダ５内に残存
する塗料を高速で洗浄除去して排液タンク45内に排出さ
せる。During the coating with the conductive paint supplied from the pump 2B to the electrostatic coating machine 1 as described above, the dump valve 15 interposed at the paint inlet 4 of the pump 2A is opened, and the paint flow is stopped. The inlet 4 is connected to the drain pipe 46 connected to the drain tank 45, and the flow path of the switching valve 12 provided in the manifold 11 is also switched to the drain pipe 46 connected to the drain tank 45, so that the pump 2A side The high-pressure cleaning air and the high-pressure cleaning liquid are alternately supplied from the cleaning air supply source 18 and the cleaning liquid tank 16 to the cylinder 5 of the pump 2A by the switching operation of the valve 20. The remaining paint is washed away at high speed and discharged into the drainage tank 45.
また、これと並行して、色替バルブ装置25Aに連結し
た塗料供給配管３の先端側に介装されているダンプバル
ブ22を開けて、その塗料供給配管３を廃液処理設備55に
至る配管に接続すると共に、色替バルブ装置25Aの洗浄
空気供給バルブCVAと洗浄液供給バルブCVWから交互に供
給する電圧洗浄空気と高圧洗浄液で塗料供給配管３内に
残存する塗料も高速で洗浄除去して廃液処理設備55に排
出させる。At the same time, the dump valve 22 interposed at the end of the paint supply pipe 3 connected to the color changing valve device 25A is opened, and the paint supply pipe 3 is connected to a pipe leading to the waste liquid treatment equipment 55. At the same time, the paint remaining in the paint supply pipe 3 is washed and removed at high speed with the voltage washing air and the high-pressure washing liquid alternately supplied from the washing air supply valve CV A and the washing liquid supply valve CV W of the color changing valve device 25A. The liquid is discharged to the waste liquid treatment equipment 55.
これにより、静電塗装機１に高電圧を印加してポンプ
2Bから定量供給される導電性塗料の塗装を行っている間
に、色替バルブ装置25Aからマニーホルド11に設けた切
換バルブ12に至るまで洗浄しておくことができる。As a result, a high voltage is applied to the electrostatic coating machine 1 to
During the coating of the conductive paint supplied in a constant amount from 2B, cleaning can be performed from the color changing valve device 25A to the switching valve 12 provided on the manifold 11.
したがって、ポンプ2Bによる塗装が終了してからポン
プ2Aによる塗装が開始されるまでのインターバルが非常
に短くなり、塗装生産性も向上する。Therefore, the interval from the end of the coating by the pump 2B to the start of the coating by the pump 2A is extremely short, and the coating productivity is also improved.
なお、被塗物の塗装部位に応じて静電塗装機１からの
塗料の吐出を一時的に停止させる制御が行われる場合
は、塗料の吐出が停止された時だけ、各切換バルブ12,1
3の流路を排液タンク45のドレン配管46側に切り換え
て、各ポンプ2A,2Bから供給される塗料を排液タンク45
へ放出し、当該各ポンプ2A,2Bから圧し出される塗料の
圧力が上昇して静電塗装機１の塗料吐出量が変動するこ
とを防止できる。When the control for temporarily stopping the discharge of the paint from the electrostatic coating machine 1 is performed in accordance with the coating portion of the object to be coated, each of the switching valves 12, 1 is only stopped when the discharge of the paint is stopped.
3 is switched to the drain pipe 46 side of the drain tank 45, and paint supplied from each of the pumps 2A and 2B is supplied to the drain tank 45.
And the pressure of the paint pressed out from each of the pumps 2A and 2B is increased to prevent the paint discharge amount of the electrostatic coating machine 1 from fluctuating.
また、洗浄液タンク16内の洗浄液が減少した時は、静
電塗装機１への高電圧の印加が停止されている間に、そ
のタンク16の補給口28に設けられた雌形カプラー29に、
洗浄液供給源30の配管31に設けられた雄形カプラー32を
エアシリンダ33で嵌合させて、洗浄液供給源30から洗浄
液を補給する。When the amount of the cleaning liquid in the cleaning liquid tank 16 decreases, while the application of the high voltage to the electrostatic coating machine 1 is stopped, the female coupler 29 provided in the supply port 28 of the tank 16 is
The cleaning liquid is supplied from the cleaning liquid supply source 30 by fitting the male coupler 32 provided on the pipe 31 of the cleaning liquid supply source 30 with the air cylinder 33.
また、排液タンク45内に回収される洗浄液等が一定以
上増加した時も、静電塗装機１への高電圧の印加が停止
されている間に、そのタンク45の排水口47に設けられた
雌形カプラー50に、廃液配管51に設けられた雄形カプラ
ー52をエアシリンダ53で嵌合させて、回収した洗浄液等
を廃液処理設備55に送出する。Further, even when the amount of cleaning liquid or the like recovered in the drainage tank 45 increases by a certain amount or more, the drainage tank 47 is provided at the drainage port 47 of the tank 45 while the application of the high voltage to the electrostatic coating machine 1 is stopped. The male coupler 52 provided in the waste liquid pipe 51 is fitted to the female coupler 50 by an air cylinder 53, and the collected cleaning liquid and the like are sent to the waste liquid treatment equipment 55.
以上述べたように、本発明によれば、水性塗料等の導
電性塗料による静電塗装を行う場合でも、その導電性塗
料の塗料供給系全体に絶縁対策を施す面倒がなくなるか
ら、数十色もの塗料供給系を有する多色塗装装置であっ
ても、設備費が嵩むことなく無公害な水性塗料による静
電塗装を行うことができるという大変優れた効果があ
る。As described above, according to the present invention, even when performing electrostatic coating using a conductive paint such as a water-based paint, it is not necessary to perform insulation measures on the entire paint supply system of the conductive paint. Even with a multicolor coating apparatus having a paint supply system, there is an extremely excellent effect that electrostatic coating can be performed with a non-polluting water-based paint without increasing equipment costs.
また、塗装を終了して次の塗装を開始するまでのイン
ターバルを短くして、多色塗装装置の色替時間も短縮す
ることができるという優れた効果がある。In addition, there is an excellent effect that the interval from the end of coating to the start of the next coating can be shortened, and the color change time of the multicolor coating apparatus can be shortened.
したがって、本発明は、有機溶剤を大量に消費する絶
縁樹脂塗料による静電塗装から水性塗料による静電塗装
への移行を促すことができるという有用性がある。Therefore, the present invention has the utility of being able to promote the transition from electrostatic coating with an insulating resin coating which consumes a large amount of an organic solvent to electrostatic coating with a water-based coating.
第１図は本発明による静電塗装装置の一例を示すフロー
シート図、第２図はその動作を示すタイムチャート図で
ある。 符号の説明 １……静電塗装機、2A,2B……ポンプ、 ３……塗料供給配管、４……塗料流入口、 ９……塗料吐出口、14……雌形カプラー、 16……洗浄液タンク、21……雄形カプラー、 45……排液タンク。FIG. 1 is a flow sheet diagram showing an example of the electrostatic coating apparatus according to the present invention, and FIG. 2 is a time chart showing the operation thereof. DESCRIPTION OF SYMBOLS 1 ... Electrostatic coating machine, 2A, 2B ... Pump, 3 ... Paint supply pipe, 4 ... Paint inlet, 9 ... Paint discharge port, 14 ... Female coupler, 16 ... Cleaning liquid Tank, 21 ... Male coupler, 45 ... Drainage tank.
Claims (1)
電性塗料を塗装する導電性塗料の静電塗装装置におい
て、 夫々の色替バルブ装置（25A,25B）により選択された任
意の色の導電性塗料を塗料流入口（４）から導入し塗料
吐出口（９）から所定の流量で圧し出して交互に供給す
る複数のポンプ（2A,2B）が、静電塗装機（１）側とド
レン配管（46）側の二方向流出路を備えた切換バルブ
（12,13）を介して静電塗装機（１）に接続されると共
に、 当該各ポンプ（2A,2B）と、各ポンプ（2A,2B）内に洗浄
液を直接供給する洗浄液タンク（16）と、各ポンプ（2
A,2B）から排出された洗浄液を回収する排液タンク（4
5）とが、夫々電気的絶縁状態で設置されて成り、 前記切換バルブ（12,13）と静電塗装機（１）に洗浄液
を供給する洗浄液供給バルブ（36）が、塗料ホース（1
0）を介して静電塗装機（１）に接続されたマニホール
ド（11）に装着されると共に、前記切換バルブ（12,1
3）は前記ドレン配管（46）を介して前記排液タンク（4
5）に接続され、 前記色替バルブ装置（25A,25B）から塗料を送給する各
塗料供給配管（３）と前記各ポンプ（2A,2B）の塗料流
入口（４）は、離れた位置から互いに係合する位置まで
進退可能に配設されたカプラー（21,14）を介して係脱
自在に連結されると共に、前記塗料供給配管（３）には
前記色替バルブ装置（25A,25B）から送給された洗浄液
を排出するダンプバルブ（22）が介装され、前記塗料流
入口（４）には前記洗浄液タンク（16）から各ポンプ
（2A,2B）に送給された洗浄液を前記排液タンク（45）
に排出するダンプバルブ（15）が介装されたことを特徴
とする導電性塗料の静電塗装装置。1. An electrostatic coating apparatus for applying a conductive paint with an electrostatic coating machine (1) to which a high voltage is applied, wherein the conductive paint is selected by respective color changing valve devices (25A, 25B). A plurality of pumps (2A, 2B) for introducing a conductive paint of an arbitrary color through the paint inlet (4), pressing out the paint at a predetermined flow rate from the paint outlet (9), and supplying the pumps alternately, comprises an electrostatic coating machine ( It is connected to the electrostatic coating machine (1) via the switching valves (12, 13) having two-way outflow passages on the 1) side and the drain pipe (46) side, and is connected to the respective pumps (2A, 2B). , A cleaning liquid tank (16) that directly supplies the cleaning liquid into each pump (2A, 2B), and each pump (2
A, 2B) A drainage tank (4
5) are installed in an electrically insulated state, respectively. The switching valve (12, 13) and the cleaning liquid supply valve (36) for supplying a cleaning liquid to the electrostatic coating machine (1) are provided with a paint hose (1).
0) through the manifold (11) connected to the electrostatic coating machine (1) and the switching valve (12, 1).
3) is connected to the drain tank (4) through the drain pipe (46).
5), the paint supply pipes (3) for supplying paint from the color changing valve devices (25A, 25B) and the paint inlets (4) of the pumps (2A, 2B) are separated from each other. Are connected to each other via couplers (21, 14) arranged to be able to move forward and backward to positions engaged with each other, and the paint supply pipe (3) is connected to the color changing valve device (25A, 25B). ) Is provided with a dump valve (22) for discharging the cleaning liquid fed from the cleaning liquid tank (16) to the pump (2A, 2B) from the cleaning liquid tank (16). The drainage tank (45)
An electrostatic coating device for conductive paint, characterized by interposing a dump valve (15) for discharging air to the device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2330210A JP2866192B2 (en) | 1990-11-30 | 1990-11-30 | Electrostatic coating equipment for conductive paint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2330210A JP2866192B2 (en) | 1990-11-30 | 1990-11-30 | Electrostatic coating equipment for conductive paint |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04200662A JPH04200662A (en) | 1992-07-21 |
| JP2866192B2 true JP2866192B2 (en) | 1999-03-08 |
Family
ID=18230077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2330210A Expired - Fee Related JP2866192B2 (en) | 1990-11-30 | 1990-11-30 | Electrostatic coating equipment for conductive paint |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2866192B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7296756B2 (en) | 2005-05-23 | 2007-11-20 | Illinois Tool Works Inc. | Voltage block |
| JP6529979B2 (en) * | 2013-10-29 | 2019-06-12 | サームテック・ホールディングス・アーエス | System for the supply and delivery of difficult to deliver substances in pipelines |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5930135B2 (en) * | 1979-02-20 | 1984-07-25 | 日本ランズバ−グ株式会社 | electrostatic painting equipment |
| SE449451B (en) * | 1986-03-24 | 1987-05-04 | Leif Tilly | SET AND DEVICE TO SUPPLY AN ELECTRIC CONDUCTIVE, LIQUID MEDIUM FROM A STOCK SYSTEM TO A CONSUMER STATION |
-
1990
- 1990-11-30 JP JP2330210A patent/JP2866192B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04200662A (en) | 1992-07-21 |
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