JPS62110760A - Cleaning method and apparatus for color change block and gun and hose for electrostatic powder coating - Google Patents

Abstract

PURPOSE:To perform cleaning wherein mixing of color is prevented in case of color changeover operation by staggering timing of both the blow-in of main purging air and the suction of subpurging air and also staggering the phases of both pulsating flows. CONSTITUTION:The valves of the pinch valves 15, 16 of the conduits 17, 18 are firstly closed and scavenging cleaning air 70 is fed while keeping a gun 22 in an opened state. Main purging air 67 for cleaning is fed under pressure to the conduits 17, 18 via a branched path 101 through an inlet 100 by means of high-pressure pulsating air current. While staggering the pulsating phase, subpurging air 68 is fed under pressure to the conduits 17, 18 and an outgoing conduit 20 through a mixing chamber 24 via an introduction port 105 and a port 44. Thereafter both purging air 67, 68 are stopped and atomized air 69 is directly fed under pressure to a gun 22. In such a way, resticking due to the backflow of paint flown is completely inhibited and the mixing of color is surely prevented.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は１静電粉体塗装用多色カラーチェンジャーに於
けるカラーチェンジブロック及びガン並びにホースのク
リーニング方法及びクリーニング装置に関する発明であ
る。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a color change block, gun, and hose cleaning method and cleaning device in a multicolor color changer for electrostatic powder coating.

（従来の技術） 従来、一般的にはカラーチェンジ１即ち塗料粉体の色替
え毎に夫迄使用していた静電粉体塗装用のガン、粉体輸
送用のホースを一端取外し、別に予め用意して置いた他
色の専用のガン及びホースと交換しなければ々らなかっ
た為１色替え作業に多くの時間と色別毎の全種装置を必
要とし多大の経費を要した。一方１上配方法に於ける経
イ￥を節減する手段として開発された１例へげスイス国
ゲマ社の出願に係る特開昭５５−１０９４６２号公開特
許公報所載の発明装置は＼単一のガン及びポースのみに
依って多色粉体塗装を為し得る装置であるが１此の装置
を使用する場合１夫迄使用していた粉体塗料を他色への
色替え前に完全に除去する必要の有る事は云う迄もない
。即ち１上記装置に於ては〜第６図に示す様に其のカラ
ーチェンジボックスＡ′の分配器４２には夫々異る色採
の塗料粉体及び其の搬送空気をホース１９に依って静電
粉体塗料吹付用のガン２２へ流動状態の下で圧送する複
数の収斂状に斜行する導路１７　、１８Ｐ等を形成しで
あるが１之等の導路は其のガン２２寄わの終結部に於て
一体となって混合室２４に接続し更に１本の送出導路２
ｏへ継がっている。而して４此の送出導路２０の先端で
混合室２４及び送出導路２０を設けた先端キヤツプＣの
端部に於て低圧空気に混合した流動状態の塗料粉体をガ
ン２２へ送出するホース１９を接続しである。上記装置
に於て）例へば第６図のホッパー２０色採の塗料粉体か
らホッパー１の塗料粉体へ切替える色替え作業を行う場
合１先づ１第１の段階として粉体塗料供給器６に依る粉
体塗料の供給を停止させる為に搬送低圧空気流１２及び
塗料粉体供給調節用の低圧空気流６１を止め）第２の段
階として粉体塗料供給器６及び導路１４のりＩＪ　　＝
ング用の高圧脈動空気流６２を停止した侭の状態で各導
路１７．１８等の端部へ接続したピンチバルブ１５及び
１６等のボート４１ヘピンチバルブ空気圧を加へてピン
チバルブ１５及び１６等の全てを閉じ１更に第３の段階
としてガン２２を開口した状態下に於て先づボート４４
ヘクリーニング用の高圧脈動空気流６３を形成するパー
ジエアを導管路６５を通して送りカラーチェンジボック
スＡ′中に付着した残留塗料粉体を舞上げ１同時にボー
ト３１及び３２からクリーニング用の高圧脈動空気流６
３自体のパージエアーを導管路６４を通して送込み導路
１７　、１８等及び混合室２４．送出導路２０のクリー
ニングを行う。次の第４の段階ではボー）　３１，３２
．４４への空気流は小さｈ値に減少し〜亦）脈動状態で
はなく定常状態で供給する。而して為成る期間に亙って
導路１７，１８等及び送出導路２０並びに混合室２４を
クリーン状態に保持し乍ら１色の切替え対象の塗料粉体
貯留用のホッパー１内の塗料粉体の４ｉｔ給を搬送空気
流１１及び低圧空気流５１の送入に依り準備し１次いで
ピンチパルプ１５のボー）４１へのピンチバルブ空気圧
４０ｂを排除する事に依りピンチパルプ１５を開けば流
動状塗料粉体のガン２２への送出が始まる。以上の色替
作業は１次の披塗装物６０が塗装ブースＢへ入る０、５
〜８秒位前に済まされている事が望ましく、此の事に依
って新しい塗料粉体の最初の数瓦が一種のクリーン作業
を行う状態に成るとも云へる。(Prior art) Conventionally, in general, when changing color 1, that is, every time the color of paint powder is changed, the gun for electrostatic powder coating and the hose used for transporting the powder are removed at one end and separately prepared in advance. Since the guns and hoses had to be replaced with dedicated guns and hoses for other colors, it took a lot of time and required all types of equipment for each color, resulting in a large amount of expense. On the other hand, an example of an invented device developed as a means to save costs in the above-mentioned method is disclosed in Japanese Patent Laid-Open No. 55-109462 filed by Gema of Switzerland. This is a device that can perform multi-color powder coating using only the gun and pose. Needless to say, there is a need to remove it. Namely, in the above-mentioned apparatus, as shown in FIG. A plurality of convergently oblique conduits 17, 18P, etc. are formed to feed under pressure to the gun 22 for spraying electrolytic powder paint in a fluid state, and one of the convergent conduits is close to the gun 22. at the end of which is integrally connected to the mixing chamber 24 and further includes one delivery conduit 2.
It continues to o. 4. At the end of the tip cap C, which is provided with a mixing chamber 24 and a delivery channel 20, the fluidized paint powder mixed with low pressure air is delivered to the gun 22. Connect the hose 19. In the above apparatus, for example, when performing a color change operation to switch from the 20 colors of paint powder in the hopper shown in Figure 6 to the paint powder in hopper 1, the first step is to transfer the powder paint powder to the powder paint supply device 6. (In order to stop the supply of powder coating material, the conveying low-pressure air flow 12 and the low-pressure air flow 61 for adjusting the coating powder supply are stopped.) As a second step, the powder coating material supply device 6 and the conduit 14 are
While the high-pressure pulsating air flow 62 for cooling is stopped, pinch valve air pressure is applied to the boats 41 such as pinch valves 15 and 16 connected to the ends of each conduit 17, 18, etc. With everything closed 1 and the gun 22 opened as a third step, first the boat 44 is opened.
Purge air forming a high-pressure pulsating air flow 63 for cleaning is sent through the conduit 65 to blow up residual paint powder adhering to the color change box A'.
3's own purge air is fed through the conduit 64 to the conduits 17, 18, etc. and the mixing chamber 24. The delivery guide path 20 is cleaned. In the next fourth stage, Bo) 31, 32
．． The air flow to 44 is reduced to a small h-value and supplied in a steady state rather than in a pulsating state. During this period, the conduits 17, 18, etc., the delivery conduit 20, and the mixing chamber 24 are kept in a clean state, and the paint in the hopper 1 for storing paint powder to be changed to one color is maintained in a clean state. A 4-ite feed of powder is prepared by introducing the conveying air flow 11 and a low-pressure air flow 51, and then the powder flows when the pinch pulp 15 is opened by removing the pinch valve air pressure 40b to the bow 41 of the pinch pulp 15. The delivery of paint powder to the gun 22 begins. The above color change work is carried out at 0 and 5 when the first painted object 60 enters the painting booth B.
It is desirable that the process be completed within about 8 seconds, and it is said that this allows the first few tiles of the new paint powder to be in a state where a kind of cleaning work is performed.

（発明が解決しようとする問題点） 処が１上記の様な入念なりリーン機構及び其の操作手段
に依って実際に色替作業を行ってみると１現実には極め
て少量ではあるが１色の混入を防止する事が出来ないと
いう問題点が発生した。(Problems to be Solved by the Invention) However, 1. When actually performing a color change operation using the elaborate lean mechanism and its operating means as described above, 1. In reality, one color changes, albeit in an extremely small amount. A problem arose in that it was not possible to prevent the contamination of

本発明の目的は１上記塗料粉体混入の原因が装置内に於
ける残留塗料粉体の存在に依るものとじ１夫れが装置内
の何処の部分に残留するかを確かめた上で１其の残留個
処へ色替え前の塗料粉体を残存させぬ為の必要な構造上
の改良を経た後の効果的力性らたなりリーニング方法及
びクリーニング装置を提供する事に在る。The purpose of the present invention is to (1) identify the cause of the above-mentioned paint powder contamination due to the presence of residual paint powder in the equipment; The object of the present invention is to provide an effective cleaning method and cleaning device after undergoing necessary structural improvements to prevent paint powder from remaining before color change from remaining in the residual areas.

（発明の構成翫問題点を解決する為の手段）本発明者が
１前記従来技術の装荷及びクリーニング方法を精査し１
内月１実験を繰返した結果、色替え前の塗料粉体の残留
個処が１（１）、ホース１９と先端キヤツプＣとの接続
部Ｎ（第５図参照）と導路１７，１８等の出口近くの内
壁部Ｍへのこびり着きの２個所である小を確認した。即
ち１前者については先端キヤツプＣの端部１０３の送出
導路２０の内周部へホース１９の外周部分を挿入したジ
ヨイント部分に径差に基づく段差状の環状の窪みＤが形
成され馬其の窪みＤへ少量の塗料粉体が滞留しパージエ
アーに依る高圧脈動空気流に依っても完全な排除が行は
れず１亦１後者の導路１７，１８等の内壁へのとびり着
の原因を推察するとλ前塗料粉体が多月°に付着した状
態で導路１７　、１８等内を高圧脈動空気流に依り同一
のパージエアーを同時に吹込んでクリーニングする為１
一方の導路へのパージエアーに依って前の色の塗料粉体
が別の色の塗料ブロックである他の導路内へ逆流して伺
着する現象が起きるものと考へられた。以上の事柄から
クリーニングを完全に行う手段として）■、先端キヤツ
プＣとホース１９との接続部を別途実願昭５９−９６０
７３刊として出願した様にホース１９の肉厚相当の環状
段濡夕′配設しホース外径と等しい内径を穿設した先端
キヤツプＣの端部１０３の送出導路２０ヘホース１９の
端部を押入れ＼ホース１９をクサビ型リング１１１を介
しブツシュ型アダプター１０７に依って確実に固定接続
し従来の段差状の環状の窪みＤを消失させ１■、クリー
ニング方法として１従来量時に行っていた各ボート３１
．３２及び４４を通しての高圧脈動空気流６３に依る同
一種の同時クリーニングを１先づ最初にピンチパルプ寄
りの導入口１００側からの高圧脈動空気流に依るパルス
クリーニングを先行させ１続いてボート４４からのパル
スクリーニングを前者の脈動の位相をづらせた高圧脈動
空気流を使用して途中から開始させる牢とし１更にガン
２ｚへ直接高圧脈動空気流をアトマイズクリーニングエ
アーとして吹込み、一方上記の全期間中低圧の定常空気
流を掃気クリーニングエアーとして導入口１００から送
込む事に依って導路１７　、１８等への塗料粉体の逆流
に依る付着を防止し装置内の完全な清掃の実現を可能に
した。(Means for solving the structural problems of the invention) The present inventor 1. examined the loading and cleaning methods of the prior art and 1.
As a result of repeating the Utsuki 1 experiment, it was found that the number of remaining paint powder spots before the color change was 1 (1), the connection part N between the hose 19 and the tip cap C (see Figure 5), the conduits 17 and 18, etc. Two small areas of sticking to the inner wall M near the exit were confirmed. Namely, regarding the former, a stepped annular recess D based on the diameter difference is formed in the joint portion where the outer peripheral portion of the hose 19 is inserted into the inner peripheral portion of the delivery conduit 20 at the end portion 103 of the tip cap C. A small amount of paint powder remains in the recess D and cannot be completely removed even by the high-pressure pulsating air flow caused by purge air, causing it to stick to the inner walls of the latter conduits 17, 18, etc. Inferring that, in order to simultaneously blow the same purge air into the conduits 17 and 18 etc. using high-pressure pulsating airflow to clean the insides of the conduits 17 and 18 with paint powder adhered to them, 1.
It was thought that the purge air flowing into one of the channels caused the paint powder of the previous color to flow back into the other channel, which was a paint block of a different color, and land there. From the above points, as a means of completely cleaning) ■, the connection part between the tip cap C and the hose 19 was separately installed in a practical application filed in 1983-960.
73, the end of the hose 19 is connected to the delivery conduit 20 at the end 103 of the tip cap C, which is provided with an annular step with a thickness equivalent to the wall thickness of the hose 19 and has an inner diameter equal to the outer diameter of the hose. The closet/hose 19 is securely connected to the bush type adapter 107 through the wedge-shaped ring 111, and the conventional step-shaped annular depression D is eliminated. 31
．． Simultaneous cleaning of the same species by high pressure pulsating air flow 63 through 32 and 44 is preceded by pulse cleaning by high pressure pulsating air flow 63 from the inlet 100 side closer to the pinch pulp, followed by pulsating cleaning by high pressure pulsating air flow 63 from the boat 44. The pulse cleaning is started from the middle using a high-pressure pulsating air flow with the phase of the former pulsation shifted. 1 Furthermore, the high-pressure pulsating air flow is directly blown into the gun 2z as atomized cleaning air, while for the entire period mentioned above. By sending a steady air flow of medium and low pressure as scavenging cleaning air from the inlet 100, it is possible to prevent paint powder from adhering to the conduits 17, 18, etc. due to backflow, and to achieve complete cleaning inside the device. I made it.

以下１本発明のクリーニング方法及びクリーニング装置
の構成を図面に示した実施例を参照して説明する。第１
図及び第２＠に於て１１及び２は夫々色採の異る塗料粉
体を貯♂ピザｖυ雫！−１１及び６は上聞ホッパーを上
部に具備した夫々色採の異る静電粉体塗装用粉体塗料の
供給器Ｓ１３及び１４は後記のカラチェンジブロックＡ
へ搬送空気流１１及び１２に浮遊混合した流動状塗料粉
体を送出する導路で図では供給器、導路等を共に２台及
び２本として画いであるが１実用上は８色程度の色替え
に対処する為夫々８台及び８本の装荷として構成する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a cleaning method and a cleaning apparatus according to the present invention will be explained below with reference to embodiments shown in the drawings. 1st
In the figure and No. 2 @, 11 and 2 respectively store paint powders of different colors ♂ pizza vυ drops! -11 and 6 are powder paint supply devices for electrostatic powder coating with different color schemes S13 and 14 are color change blocks A described later.
This is a conduit that sends out the fluidized paint powder suspended and mixed in the conveying air streams 11 and 12.The figure shows two supply devices and two conduits, but in practice, it is used for about eight colors. In order to deal with color changes, eight units and eight units are installed, respectively.

５１及び６１は供給器６及び６内へ送る低圧空気流で１
供給器内の負圧区の圧力を調整して搬送空気に混合させ
る塗料粉体の粉体量を規制する。51 and 61 are low pressure air flows sent into the feeders 6 and 6.
The amount of paint powder mixed into the conveying air is regulated by adjusting the pressure in the negative pressure section within the feeder.

１５及び１６は合成ゴム等の弾性皮膜で造った紋弁部４
０ａを有する空気室４０で形成したピンチパルプで、ボ
ート４１からのピンチパルプ空気圧４０ｂの加減に依っ
てバルブの開閉を行う。Ａ　ｋｔ多多色流動状塗物粉体
切替装置カラーチェンジブロックで一金属１１１１であ
り、４２は其の分配器１Ｇは其の先翰キヤツプで分配器
４２へ嵌外し１１丁能に固着する。１７．］８．Ｐ　Ｑ
はカラーチェンジブロックＡの分配器４２を貫通し為の
導路で１図には共の８本を示しであるが前Ｕ己供給器等
と仝様実際ｙｃは８本捏度迄を設置し、不用の分には１
ｔ′の入口へ盲蓋Ｑをして閉鎖して置く。尚１導路１７
，１８．Ｐ等は分配、器４２の先瑞ギヤツプＣ寄シの端
部に於て収斂状態で後記の混合室２４の前面と接続する
。Ｚｏｏは高圧脈動空気流奄で形成する主パージエアー
の導入口で・圧力空気〆ら電磁又は側面へＪｌ数又は枚
数穿設する。１０１は導入口を導路１７，１Ｂ、Ｐ等へ
導入する。２４は前記した先端キヤツプＣに設けた混合
室で１円錐形に構成し其の送出端Ｈ送出導路２０として
基部１０２又は其処から少しく端部１０３寄りに環状段
部１０４を設けるが、此の環状段部１０４から混合室２
４寄りの送出導路２０の内径は後記のホース１９の内径
に合せ為端部１０３寄りの内径は環状段部１０４の段差
をポース１！］の肉厚と雪しくする為（（ポース１≦）
の夕日￥と合致させる。１０５（ｄボエアー６７と位相
の異る副パージエアー６８を導管路６５に依って送込む
。１０６は耐圧性の太き々合成樹脂系旧料例へは商品名
ジュラコン又は金属旧料で造った先端キヤツプＣの送出
導路２０側の端部１０３の外周に刻設したｕトネジ、１
０７は此の−ｊｌＦネジ１０６に螺合する鮪ネジを内面
に刻設し中央部へ通孔及び環状接合面を有するブツシュ
型アダプターで、ホース面に其の外側の外側環状傾斜面
を合致させ、内側の透孔ヘホース１９の外面をきっちり
と挿通させるポリアミド、ポリエステル光性の合成樹脂
旧料等から成る強靭〃ポース固着用のクリーニングであ
る。尚１第３図は本発明のクリーニング方法の手＋１１
を示す過程の説明図であり１亦、第４図は本発明のクリ
ーニング装置に関係する制御装置の配線及びソレノイド
等の配置図である。15 and 16 are emblem portions 4 made of an elastic film such as synthetic rubber.
With the pinch pulp formed in the air chamber 40 having 0a, the valve is opened and closed depending on the pinch pulp air pressure 40b from the boat 41. A kt multicolor fluid coating powder switching device is a color change block made of one metal 1111, and its distributor 1G 42 is fitted into and removed from the distributor 42 by its tip cap, and is fixed to the distributor 42 with 11 pins. 17. ]8. PQ
is a conduit that passes through the distributor 42 of the color change block A, and although eight of them are shown in Figure 1, in reality up to eight lines are installed in front of the U self-supplier, etc. , 1 for unnecessary parts
A blind lid Q is placed on the inlet of t' and kept closed. Note 1 conduit 17
,18. P, etc. are connected to the front surface of a mixing chamber 24, which will be described later, in a converging state at the end of the distributing vessel 42 near the first gap C. Zoo is the main purge air inlet formed by high-pressure pulsating air flow, and the number of holes is drilled in the electromagnetic or side surface from the pressure air filter. Reference numeral 101 introduces the inlet into the guide paths 17, 1B, P, etc. Reference numeral 24 denotes a mixing chamber provided in the above-mentioned tip cap C, which has a conical shape, and has an annular stepped portion 104 as the delivery end H delivery conduit 20 at the base 102 or a little closer to the end 103 from the base 102. From the annular step 104 to the mixing chamber 2
The inner diameter of the delivery conduit 20 closer to 4 matches the inner diameter of the hose 19 described later, so the inner diameter closer to the end 103 matches the step of the annular step 104 to pose 1! ] To make it thicker and look like snow ((pose 1≦)
Match sunset ¥. 105 (auxiliary purge air 68, which has a different phase from the d-bore air 67, is sent through the conduit 65. 106 is made of a pressure-resistant thick synthetic resin-based old material, or the product name is Duracon or a metal old material). A U-threaded screw 1 carved on the outer periphery of the end 103 of the tip cap C on the delivery conduit 20 side.
07 is a bush type adapter with a screw threaded on the inner surface to be screwed into this -jlF screw 106, and has a through hole and an annular joint surface in the center, and its outer annular inclined surface matches the hose surface. This is a cleaning method for fixing a strong hose made of polyamide, polyester, or other light-sensitive synthetic resin materials, which allows the outer surface of the hose 19 to be tightly inserted into the inner through-hole. 1. Figure 3 shows the cleaning method of the present invention +11
FIGS. 1 and 4 are diagrams showing the arrangement of wiring, solenoids, etc. of a control device related to the cleaning device of the present invention.

（作　用） 上記の部分構造から成る本発明装置に於て色替え作業を
実施する場合の装置のクリーニング方法減圧弄４経て搬
送空気流１２として粉体塗料の供給器６に送入され更に
低圧空気流６１に依る調整に依って供給器６内の負圧を
調整してガン２２へ送る流動状塗料粉体の部を規制し導
路１４．開放したピンチバルブ１６を経た流動状塗料粉
体は１導路１８．混合室２４、送出導路２０．ホース１
９を通ってガン２２へ達シ、ノヅルを有さ力いか又は有
するガン２２の先端から塗装ブースＢ内の被塗装物６０
へ吹付ける。次に此の塗装々置に於て色替えをする場合
には１先づ夫迄使用していた供給器６の塗料粉体の供給
を止め搬送空気流Ｊ２を停止させ（第８図■の塗装機メ
インスイッチ・電磁弁Ｏｆｆ　）た後）第３図に示す様
Ｉ乃至■の各過程に従って第４図に示す制御装置等 弁部４０ａが密着して供給器６及び６（ｉｍらの塗料粉
体の流入を停止しＳ、ｆＪ、ｓ供給器側へのクリーニン
グエアーの侵入も阻止する。次に■の過程では）第８図
■に示す様にクリーニングスイッチＳのＯＮの後約８秒
経過後クリーニング用の主パージェγ２３を圧力空気源
７２から電磁弁５ＯＩ４７を経て６ｋｇ１０ＴｒＰら導
入口１００５分岐路１０１を通り導路１７，１８．Ｐ等
へ吹込む。尚１其の際ガン２２は其の吹付孔を開放状態
ていた塗料粉体は先づ其の大部分が混合室２４へ向って
吹飛ばされ送出導路２０．ホース１９を経てノＪン２２
ング用の副バージエ４カ空気源７２等（主ツク−導管路
６５から導入口１０５．ボート４４を通じ混合室２４を
ＯＮと成る様交互にＯＮ及びＯｆｆを行って位相をづら
す。上記に依りカラーチェンジブロックＡ内を其の上部
からクリーニングを始め１１５秒程度経過後に６秒間程
度下部のクリーニングを行うが１其の回生及び副パージ
各エアーを交互に吹込む事に依りパージエアーの逆流に
起因するクリーニングの不良を阻止する。次に続けて■
の過程では圧力空気源７８から電磁弁ＳＱＬ　ＩＩを経
て６ｋｇ／Ｇ留程度のんでガン２２内を清掃し面後３秒
程度後にクリーニングスイッチＳをＯｆｆにする事に依
ってクリーニング作業を終了するので、此の時点に於て
ピンチパルプ１５のピンチパルプ空気圧４０ｂの加圧を
止め塗装機メインスイッチをＯＮとすれば）搬送空気流
１１、低圧空気流５１等の作用に依って色替え後の塗料
粉体貯留ホッパー６からの流動塗料粉体の導路１３　、
１７、送出導路２０．ホース１９を通してガン２２への
送込が可能な状態と成る。尚）上記の第１乃至第４即ち
る掃気クリーニングエアーを導管路６４から０．１５ｋ
ｇ／（、ｄ程度で流入させておく事に依って主パーシェ
アー系統内への塗料粉体の逆流の完全防止を一層強化出
来る（第８図■参照）・ （発明の効果） 本発明の静電粉体塗装機用多色カラーチェンジャーに於
けるカラーチェンジブロック及びガン並びにホースのク
リーニング方法及びクリーニング装置に依れば）従来の
クリーニングが上方及び下方からの高圧空気流に依るパ
ージエアの送込を同時に行っていたクリーニングを主パ
ージエアの吹込と副パージエアの吹込とのタイミングを
づらすと共に両者の脈動流の位相をもづらす事に依って
クリーニング操作に依って舞上った塗料粉体の逆流に依
る再度の付着を完全に阻止し色替えの際の色替え前に使
用していた塗料粉体の残留及び付着に基づく色の混入を
完全に防止する事が可能と成るものである。(Function) Method for cleaning the device when carrying out a color change operation in the device of the present invention having the above-mentioned partial structure. By regulating the air flow 61, the negative pressure in the feeder 6 is regulated to regulate the portion of the fluidized paint powder that is delivered to the gun 22 and the conduit 14. The fluid paint powder that has passed through the open pinch valve 16 is transferred to one channel 18. Mixing chamber 24, delivery conduit 20. hose 1
9 to the gun 22, and from the tip of the gun 22 having a nozzle to the object 60 in the coating booth B.
Spray on. Next, when changing the color at this painting station, stop supplying the paint powder from the supply device 6 that has been used up until now and stop the conveying air flow J2 (as shown in Figure 8). After turning off the main switch and solenoid valve of the paint sprayer), the valve parts 40a of the control device etc. shown in FIG. It stops the inflow of powder and also prevents the cleaning air from entering the S, fJ, and s supply side.Next, in the process of After the elapse of time, the main purge γ23 for cleaning is passed from the pressure air source 72 through the solenoid valve 5OI47 to 6kg10TrP, through the inlet 1005, the branch path 101, and the conduit 17, 18. Blow into P etc. At this time, the gun 22 has its spray hole open, and most of the paint powder is first blown away toward the mixing chamber 24 and into the delivery channel 20. NoJn 22 via hose 19
4 auxiliary verges for mixing, air sources 72, etc. (from the main conduit 65 to the inlet 105. The mixing chamber 24 is turned on through the boat 44 by alternately turning on and off to shift the phase. Cleaning inside the color change block A starts from the upper part and after about 115 seconds, the lower part is cleaned for about 6 seconds, but this is due to the backflow of purge air due to the regeneration and sub-purge air being blown in alternately. Prevent poor cleaning.Next, continue ■
In the process, the inside of the gun 22 is cleaned by injecting about 6 kg/G from the pressurized air source 78 through the solenoid valve SQL II, and after about 3 seconds, the cleaning switch S is turned off to complete the cleaning operation. At this point, if the pressurization of the pinch pulp air pressure 40b of the pinch pulp 15 is stopped and the main switch of the coating machine is turned on), the paint after color change is applied by the action of the conveying air flow 11, the low pressure air flow 51, etc. A conduit 13 for fluidized paint powder from the powder storage hopper 6,
17. Output conduit 20. It is now ready to be fed to the gun 22 through the hose 19. Note) The above-mentioned first to fourth scavenging cleaning air is supplied from the conduit 64 by 0.15k.
By allowing the paint powder to flow at around g/(, d), it is possible to further strengthen the complete prevention of backflow of paint powder into the main parshare system (see Figure 8 ■) (Effects of the Invention) The present invention According to the cleaning method and cleaning device for the color change block, gun, and hose in a multicolor color changer for electrostatic powder coating machine), conventional cleaning is performed by supplying purge air using high-pressure air flow from above and below. By shifting the timing of blowing in main purge air and blowing in sub-purge air, and also by shifting the phase of the pulsating flow between the two, the paint powder that was thrown up by the cleaning operation can be removed. It is possible to completely prevent re-adhesion due to backflow and to completely prevent color contamination due to residual and adhesion of paint powder used before color change when changing colors.

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

第１図は本発明を実施する装置の要部の断面図１第２図
は本発明の実施例の全体を一部を断面で示した配置図、
第８図は本発明のクリーニング方法の各過程を示す時間
順の説明図、第４図は不発明のクリーニング装置を操作
させる制御装置の説明図的配線図１第６図は従来方法に
於て使用した装置の全体を一部を断面で示した配置図で
ある。 図の主要な部分を表す符号の説明 Ａ　・・・カラーチェンジブロック１１，２・・・塗料
粉体貯留ホッパー１６，６・・・（塗料粉体の）供給器
Ｘ　１１＋］２・・・搬送空気流Ｎ　１３，１４・・奉
導路％　１５．１６・・・ピンチパルプ、４０・・・空
気室、４０ａ・・・紋弁部、４０ｂ・・・ピンチパルプ
空気圧、４１・・・ボート〜４２・・・分配器、１７．
１８．Ｐ・・・導路１Ｑ・・・盲蓋１１９・番・ホース
、２０・・・送出導路１Ｇ・・・先端キヤツプ１２２・
・・ガン１２４・・−混合室ｓ　３１，３２．４４・・
・ボート、Ｂ・・・塗装ブース、５１．６１・・・低圧
空気流、６４，６５．６６・・・導管路、６７、・・・
主パージエアー（高、１０３ＩＩ１１１端部、１０４１
・環状段部、１０７ｅ・・ブツシュ型アダプター、１１
１・・・クサビ型リング、７０・・・掃気クリーニング
エアー％　’１２．７３・・・圧力空気源。FIG. 1 is a cross-sectional view of the main parts of an apparatus for carrying out the present invention. FIG.
FIG. 8 is a chronological explanatory diagram showing each process of the cleaning method of the present invention; FIG. 4 is an explanatory wiring diagram of a control device for operating the uninvented cleaning device; FIG. FIG. 2 is a layout diagram showing a part of the entire device used in cross section. Explanation of the symbols representing the main parts of the figure A...Color change block 11, 2...Paint powder storage hopper 16, 6...(Paint powder) supply device X 11+] 2...Transportation Air flow N 13, 14... Conduit % 15.16... Pinch pulp, 40... Air chamber, 40a... Crest part, 40b... Pinch pulp air pressure, 41... Boat ~ 42...Distributor, 17.
18. P...Conduit 1Q...Blind lid No. 119/Hose, 20...Delivery guideway 1G...Tip cap 122/
...Gun 124...-Mixing chamber s 31, 32.44...
・Boat, B...painting booth, 51.61...low pressure air flow, 64,65.66...conduit, 67,...
Main purge air (high, 103II 111 end, 1041
・Annular stepped portion, 107e...Bush type adapter, 11
1...Wedge-shaped ring, 70...Scavenging cleaning air% '12.73...Pressure air source.

Claims (2)

【特許請求の範囲】[Claims] （１）、夫々、入口が分離し出口に於て集結する異る色
の流動粉体塗料を供給する複数の導路１７、１８、Ｐ等
を配設した分配器４２と、此の分配器４２へ嵌め外し可
能に装着し上記集結した複数の導路１７、１８、Ｐ等の
全てに継がる円錐形の混合室２４から引続きロート状に
続く送出導路２０を有する先端キヤツプＣとから成るカ
ラーチエンジブロツクＡと、上記先端キヤツプＣの送出
導路２０に於て先端キ ヤツプＣへ接続したホース１９と、ホース１９の先端キ
ヤツプＣ側と反対の端部に装着した塗料粉体吹付用の単
数又は複数のガン２２とを具備する静電粉体塗装用多色
カラーチエンジヤーのカラーチエンジブロツク及びガン
並びにホースの清掃方法として、電気制御等の自動制御
又は手仂に依り導路１７、１８、Ｐ等の入ロへ装着した
ピンチバルブ１５、１６等の絞弁部４０ａを閉鎖する第
１の過程と、ガン２２を開口状態にした儘全過程中低圧
定常空気流から成る掃気クリーニングエアー７０を送り
乍ら、クリーニング用の主パージエアー６７として導管
路６４を通じ導入口１００及び分岐路１０１を経て高圧
脈動空気流（パルスエアー）を導路１７、１８、Ｐ等へ
仝時に圧入する第２の過程と、上記主パージエアー６７
の高圧脈動空気の圧入を継続した儘、脈動位相をづらし
、主パージエアー６７がＯｎの時ＯｆｆでＯｆｆの時Ｏ
ｎの高圧脈動空気流（パルスエアー）から成る副パージ
エアー６８を導管路６５を通じ導入口１０５及びポート
４４を経て混合室２４から導路１７、１８、Ｐ等及び送
出導路２０へ圧入する第３の過程と、其の後上記主副両
パージエアーの圧入を止めて高圧脈動空気流（パルスエ
アー）から成るアトマイズエアー６９を直接ガン２２へ
圧入する第４の過程とから成る静電粉体塗装用カラーチ
エンジブロツク及びガン並びにホースのクリーニング方
法。(1) A distributor 42 in which a plurality of conduits 17, 18, P, etc. are arranged for supplying fluid powder paints of different colors whose inlets are separated and converge at the outlet, respectively, and this distributor 42 and a distal end cap C having a delivery conduit 20 that continues in a funnel shape from a conical mixing chamber 24 that is removably attached to the plurality of conduit conduits 17, 18, P, etc. A color change block A, a hose 19 connected to the tip cap C in the delivery conduit 20 of the tip cap C, and a unit for spraying paint powder attached to the end of the hose 19 opposite to the tip cap C side. Alternatively, as a method for cleaning the color change block, guns, and hoses of a multicolor color changer for electrostatic powder coating, which is equipped with a plurality of guns 22, the conduits 17, 18, During the first process of closing the throttle valve part 40a of the pinch valve 15, 16, etc. attached to the inlet of the P, etc., and during the entire process when the gun 22 is opened, the scavenging cleaning air 70 consisting of a low-pressure steady air flow is used. While the main purge air 67 for cleaning is being supplied, a second air stream is used which simultaneously pressurizes a high-pressure pulsating air flow (pulsed air) into the conduits 17, 18, P, etc. through the conduit 64 through the inlet 100 and the branch passage 101. process and the above main purge air 67
As long as the high-pressure pulsating air continues to be injected, the pulsation phase is shifted, and when the main purge air 67 is on, it is off, and when it is off, it is o.
A secondary purge air 68 consisting of a high-pressure pulsating air flow (pulsed air) of 3, and a fourth step in which the injection of both the main and sub-purge air is stopped and the atomized air 69 consisting of high-pressure pulsating air flow (pulse air) is directly forced into the gun 22. How to clean paint color change blocks, guns, and hoses. （２）、夫々、入口が分離し出口に於て集結する異る色
の流動粉体塗料を供給し入口に絞弁４０ａを有するピン
チバルブ１５、１６等を装着した複数の導路１７、１８
、Ｐ等を配設した分配器４２と、此の分配器４２へ嵌外
し可能に装着し上記集結した複数の導路１７、１８、Ｐ
等の全てに継がる円錐形の混合室２４から引続きロート
状に続く送出導路２０を有する先端キヤツプＣとから成
るカラーチエンジブロツクＡと、上記先端キヤツプＣの
送出導路２０に於て、先 端キヤツプＣに接続したホース１９と、此のホース１９
の先端キヤツプＣの接続側と反対側の端部へ装着した流
動状塗料粉体吹付用の単数又は複数個のガン２２とを具
備し、導路１７、１８、Ｐ等の入口寄りには、夫等に共
通しカラーチエンジブロツクＡの端面に穿設した導入口
１００から夫々分岐する分岐路１０１を開口させ、亦、
前記先端キヤツプＣの混合室２４には先端キヤツプの端
面に穿設した導入口１０５と接続するポート４４を開口
させ、尚且、前記導口１００には高圧脈動空気流から成
る主パージエアー６７及び低圧定常空気流から成る掃気
クリーニングエアー７０を供給する導管路６４を、導入
口１０５には高圧脈動空気流から成る副パージエアー６
８を供給する導管路６５を接続し、一方、ガン２２へは
高圧脈動空気流から成るアトマイズクリーニングエア６
９を供給する導管路６６を接続して成る静電粉体塗装用
カラーチエンジブロツク及びガン並びにホースのクリー
ニング装置。(2) A plurality of conduits 17, 18, each equipped with pinch valves 15, 16, etc., each having a throttle valve 40a at the inlet and supplying fluid powder paints of different colors, each having a separate inlet and converging at the outlet.
.
A color change block A consists of a tip cap C having a delivery conduit 20 continuing in a funnel shape from a conical mixing chamber 24 that connects to all of the above. Hose 19 connected to cap C and this hose 19
It is equipped with one or more guns 22 for spraying fluid paint powder attached to the end opposite to the connection side of the tip cap C, and near the entrances of the conduits 17, 18, P, etc. A branch path 101 is opened from an inlet 100 that is common to the husbands, etc. and is formed in the end face of the color change block A, and
The mixing chamber 24 of the tip cap C has a port 44 connected to an inlet 105 formed in the end face of the tip cap, and the inlet 100 is supplied with main purge air 67 consisting of a high-pressure pulsating air flow and a low-pressure A conduit 64 is connected to supply scavenging cleaning air 70 consisting of a steady air flow, and an auxiliary purge air 6 consisting of a high pressure pulsating air flow is connected to the inlet 105.
8 is connected to the conduit 65, while the gun 22 is supplied with atomized cleaning air 6 consisting of a high pressure pulsating air flow.
A cleaning device for electrostatic powder coating color change blocks, guns, and hoses, which is connected to a conduit 66 for supplying water.