JPS5844032B2 - Cleaning method and device for air atomization electrostatic coating machine - Google Patents
Cleaning method and device for air atomization electrostatic coating machineInfo
- Publication number
- JPS5844032B2 JPS5844032B2 JP53149260A JP14926078A JPS5844032B2 JP S5844032 B2 JPS5844032 B2 JP S5844032B2 JP 53149260 A JP53149260 A JP 53149260A JP 14926078 A JP14926078 A JP 14926078A JP S5844032 B2 JPS5844032 B2 JP S5844032B2
- Authority
- JP
- Japan
- Prior art keywords
- air
- paint
- coating machine
- nozzle
- 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.)
- Expired
Links
- 238000004140 cleaning Methods 0.000 title claims description 30
- 238000000034 method Methods 0.000 title claims description 15
- 238000000889 atomisation Methods 0.000 title claims description 13
- 238000009503 electrostatic coating Methods 0.000 title claims description 13
- 239000003973 paint Substances 0.000 claims description 54
- 238000010926 purge Methods 0.000 claims description 15
- 239000007788 liquid Substances 0.000 claims description 10
- 238000005507 spraying Methods 0.000 claims 1
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 238000010422 painting Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000007591 painting process Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007590 electrostatic spraying Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
- B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
Landscapes
- Cleaning By Liquid Or Steam (AREA)
- Details Or Accessories Of Spraying Plant Or Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Description
【発明の詳細な説明】
本発明はエア霧化型静電塗装機の洗浄方法及び洗浄装置
の改良に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a cleaning method and a cleaning device for an air atomization type electrostatic coating machine.
従来、塗装時に塗料ノズルから塗料を荷電させて噴射さ
せると共にエアノズルから塗料霧化用エアを噴射させ、
塗料色替時に塗料霧化用エアの供給を止めて塗料ノズル
にシンナー等の洗浄液を供給するエア霧化型静電塗装機
による塗装・洗浄方法が用いられていた。Conventionally, during painting, paint is charged and sprayed from a paint nozzle, and air for atomizing the paint is sprayed from an air nozzle.
A painting/cleaning method using an air atomizing electrostatic coating machine was used, in which the supply of air for atomizing the paint was stopped and a cleaning liquid such as thinner was supplied to the paint nozzle when changing the paint color.
ところが、こうした従来方法においては、色替時に塗料
を含んだ洗浄液が塗料ノズルの噴出口から垂れてエアノ
ズルを汚すこととなっていた。However, in these conventional methods, when changing colors, cleaning fluid containing paint drips from the spout of the paint nozzle and contaminates the air nozzle.
また、エアノズルのエア通路に侵入した塗料や洗浄液が
次の被塗物に向って飛ばされ、微粒化しない塗料のかた
まりが付着するスピット現象や異色塗料付着による塗装
不良を引き起こす原因となっていた。In addition, paint and cleaning liquid that have entered the air passage of the air nozzle are blown toward the next object to be coated, causing a spitting phenomenon in which lumps of paint that do not become atomized adhere, and coating defects due to adhesion of different colored paint.
そこで、従来は、洗浄時にエアノズル及び塗料ノズルを
有する塗装ガンを真下に向けて洗浄液等がエアノズルに
付着しないようにしていたが、塗装ガンに急角度の首振
運動を行なわせるため、高圧ケーブル、ホース類等が損
傷することとなっていた。Conventionally, the painting gun with the air nozzle and paint nozzle was directed downwards during cleaning to prevent cleaning fluid from adhering to the air nozzle. Hoses, etc. were to be damaged.
また、手作業を要する欠点もあった。本発明は上記問題
を解消したエア霧化型静電塗装機の洗浄方法及び洗浄装
置を提供することを目的とするもので、方法の発明は、
塗料ノズルに洗浄液を供給する間、エアノズルに塗料霧
化用エアより低圧のパージングエアを供給することを特
徴とし、装置の発明は、エアノズルに、塗料霧化用エア
を供給する塗料霧化用エア経路と、該塗料霧化用エアよ
り低圧のパージングエアを供給するパージングエア供給
経路とを切換可能に連結したことを特徴とするものであ
る。It also had the disadvantage of requiring manual labor. An object of the present invention is to provide a cleaning method and a cleaning device for an air atomization type electrostatic coating machine that solves the above-mentioned problems.
While supplying the cleaning liquid to the paint nozzle, purging air having a lower pressure than the paint atomizing air is supplied to the air nozzle. The present invention is characterized in that the passage and a purging air supply passage that supplies purging air at a lower pressure than the paint atomizing air are switchably connected.
以下に図示の実施例について説明する。The illustrated embodiment will be described below.
第１図において、１はエア霧化型静電塗装機で、該静電
塗装機１の先端部には第２図に示すように、塗料ノズル
２を設け、該ノズル２内より針状電極３を外部に向けて
突出させ、針状電極３の周りにエアノズル４を設ける。In FIG. 1, reference numeral 1 denotes an air atomization type electrostatic coating machine, and the tip of the electrostatic coating machine 1 is provided with a paint nozzle 2, as shown in FIG. 3 protrudes outward, and an air nozzle 4 is provided around the needle electrode 3.
塗料ノズル２には塗料供給経路の一部をなす塗料ホース
５を接続し、該ホース５に各種塗料及び洗浄液供給源（
図示せず）を切換可能に接続する。A paint hose 5 that forms part of the paint supply route is connected to the paint nozzle 2, and various paint and cleaning liquid supply sources (
(not shown) are switchably connected.
エアノズル４にはエアホース６を接続し、該エアホース
６に塗料霧化用エアを供給する塗料霧化用エア経路７と
、塗料霧化用エアより低圧のパージングエアを供給する
パージングエア経路８とを切換可能に接続する。An air hose 6 is connected to the air nozzle 4, and a paint atomizing air path 7 that supplies paint atomizing air to the air hose 6 and a purging air path 8 that supplies purging air having a lower pressure than the paint atomizing air are connected to the air nozzle 4. Connect switchably.
塗料霧化用エア経路７において、９はエア源、１０はエ
アレギュレータ、１１は圧力計、１２は電磁開閉弁であ
る。In the paint atomizing air path 7, 9 is an air source, 10 is an air regulator, 11 is a pressure gauge, and 12 is an electromagnetic on-off valve.
パージングエア経路８において、１３はエアレギュレー
タ、１４は圧力計、１５は電磁開閉弁、１６はチェック
弁である。In the purging air path 8, 13 is an air regulator, 14 is a pressure gauge, 15 is an electromagnetic on-off valve, and 16 is a check valve.
ここではエア源９はパージングエア経路８のエア源を兼
ねている。Here, the air source 9 also serves as an air source for the purging air path 8.
両電磁開閉弁１２．１５は制御盤１７からの信号を受け
て交互に開閉する。Both electromagnetic on-off valves 12 and 15 open and close alternately in response to signals from the control panel 17.
上記実施例装置を用いた洗浄方法の一例を第３図のタイ
ムチャートに従って説明する。An example of a cleaning method using the apparatus of the above embodiment will be explained according to the time chart shown in FIG.
図において、斜線部１８，１９は静電塗装工程を示し、
斜線部２０，２１は塗料供給工程を示し、斜線部２２は
洗浄液供給工程を示し、斜線部２３はエア供給工程を示
す。In the figure, shaded areas 18 and 19 indicate the electrostatic coating process,
The shaded areas 20 and 21 indicate the paint supply process, the shaded area 22 indicates the cleaning liquid supply process, and the shaded area 23 indicates the air supply process.
エア供給工程２３において、区間Ａ１．Ａ３は塗料霧化
用エア供給区間を示し、区間Ａ２はパージングエア供給
区間を示す。In the air supply step 23, the section A1. A3 indicates a paint atomizing air supply section, and section A2 indicates a purging air supply section.
塗装工程１８の区間においては塗料ノズル２から塗料粒
子が荷電されて噴射され、エア源９から高圧のエアが電
磁開閉弁１２を通って塗料霧化用エアとして塗装機１に
供給され、エアノズル４から噴射される（区間Ａ１）。In the section of the painting process 18, paint particles are charged and sprayed from the paint nozzle 2, and high-pressure air is supplied from the air source 9 through the electromagnetic on-off valve 12 to the paint sprayer 1 as paint atomizing air. (section A1).
この間、電磁開閉弁１５は閉状態にある。During this time, the electromagnetic on-off valve 15 is in a closed state.
色替えを行なう場合、塗装工程１８が終了すると、塗料
の供給（工程２０）が停止され、その後、電磁開閉弁１
２が閉に切換わると共に電磁開閉弁１５が開に切換わる
。When changing the color, when the painting process 18 is finished, the supply of paint (step 20) is stopped, and then the electromagnetic on-off valve 1 is stopped.
2 is switched to close, and at the same time, the electromagnetic on-off valve 15 is switched to open.
これによって、エアレギュレータ１３で低圧設定された
エアが電磁開閉弁１５及びチェック弁１６を通ってパー
ジングエアとして塗装機１に供給され、エアノズル４か
ら弱い圧力で噴射される（区間Ａ２）その間、塗料ホー
ス５に洗浄液が供給され（工程２２）、塗料系統の洗浄
が行なわれる。As a result, air set at a low pressure by the air regulator 13 is supplied to the coating machine 1 as purging air through the electromagnetic on-off valve 15 and the check valve 16, and is injected from the air nozzle 4 at a low pressure (section A2). A cleaning liquid is supplied to the hose 5 (step 22), and the paint system is cleaned.
ここで、塗料ノズル２の噴出口から塗料等が垂れても、
エアノズル４からは低圧のエアが噴出されているため、
垂れた塗料がエアノズル４０周りや内部に付着、侵入す
ることはない。Here, even if paint etc. drips from the spout of the paint nozzle 2,
Since low pressure air is ejected from air nozzle 4,
Dripping paint will not adhere to or enter the area around or inside the air nozzle 40.
また、噴出されるエアは低圧に保たれているため、垂れ
た塗料、洗浄液等が広範囲に飛散するようなことはない
。Furthermore, since the ejected air is kept at a low pressure, dripping paint, cleaning fluid, etc. will not be scattered over a wide area.
洗浄工程２２が終了すると再び高圧の塗料霧化用エアに
切換わり（区間Ａ３）、塗料ノズル２に他色の塗料が供
給され（工程２１）、次の塗装工程１９が開始される。When the cleaning step 22 is completed, the system switches again to high-pressure paint atomizing air (section A3), paint of another color is supplied to the paint nozzle 2 (step 21), and the next painting step 19 is started.
なお、パージングエア圧は塗装設備の大小等に応じて適
宜に設定され得る。Note that the purging air pressure can be appropriately set depending on the size of the coating equipment, etc.
また、本発明方法の実施に用いる装置としては、上記の
他、１つのエア供給経路途中に圧力可変手段を設けるも
のであってもよい。In addition to the above, the apparatus used to carry out the method of the present invention may be one in which a pressure variable means is provided in the middle of one air supply path.
以上説明したように、洗浄方法の発明にあっては、洗浄
時にエアノズルから低圧のパージングエアを噴出させる
から、塗料ノズルから吐出した塗料、洗浄液等がエアノ
ズル内に入ってスピット現象等の塗装不良を誘起するよ
うな虞れがなくなるのはもちろんのこと、静電塗装機を
首振りさせる必要がなくなるから、人手が省ける他、高
圧ケーブル、ホース類等が損傷する危険性もなくなる。As explained above, in the invention of the cleaning method, low-pressure purging air is ejected from the air nozzle during cleaning, so paint, cleaning liquid, etc. discharged from the paint nozzle enter the air nozzle and cause coating defects such as spitting. Not only does this eliminate the risk of electrostatic spraying, but it also eliminates the need to swing the electrostatic sprayer, which saves manpower and eliminates the risk of damaging high-voltage cables, hoses, etc.
また、低圧エアを用いるため、エア消費量の節約が図れ
る他、洗浄時に塗料等が飛散して塗装待機中又は塗装品
が汚染するような虞れがなくなる。In addition, since low-pressure air is used, air consumption can be saved, and there is no risk of paint etc. scattering during cleaning and contaminating painted products or while waiting for painting.
また、洗浄装置の発明にあっては、簡単な構成でかつ自
動的に供給エアの切換えを行ない得る利点を奏する。Further, the cleaning device according to the invention has the advantage of having a simple configuration and automatically switching the supply air.
第１図は本発明方法に用いる供給エア切換機構を備えた
エア霧化型静電塗装機の一例を示す概略構成図。
第２図は第１図に示す塗装機先端部の縦断面図。
第３図は本発明方法の一実施例を説明するタイムチャー
ト図。
１・・・・・・エア霧化型静電塗装機、２・・・・・・
塗料ノズル、４・・・・・・エアノズル、７・・・・・
・塗料霧化用エア経路、８・・・・・・パージングエア
経路。FIG. 1 is a schematic configuration diagram showing an example of an air atomization type electrostatic coating machine equipped with a supply air switching mechanism used in the method of the present invention. FIG. 2 is a longitudinal sectional view of the tip of the coating machine shown in FIG. 1. FIG. 3 is a time chart diagram illustrating one embodiment of the method of the present invention. 1... Air atomization type electrostatic coating machine, 2...
Paint nozzle, 4... Air nozzle, 7...
- Air path for paint atomization, 8... Purging air path.
Claims (1)
射を停止すると共に塗料供給経路へ洗浄液を供給するエ
ア霧化型静電塗装機の洗浄方法において、前記洗浄液供
給時に前記エアノズルから前記塗料霧化用エアよりも低
圧のパージングエアを噴射することを特徴とするエア霧
化型静電塗装機の洗浄方法。 ２ 塗料供給経路の先端部近傍にエアノズルを設け、該
エアノズルに塗料霧化用エアを供給する塗料霧化用エア
経路を連結し、前記塗料供給経路に切換手段を介して洗
浄液供給源を連結してなるエア霧化型静電塗装機の洗浄
装置において、前記エアノズルに、前記塗料霧化用エア
経路と切換可能に、前記塗料霧化用エアよりも低圧のパ
ージングエアを供給するパージングエア供給経路を連結
したことを特徴とするエア霧化型静電塗装機の洗浄装置[Scope of Claims] 1. In a method for cleaning an air atomizing electrostatic coating machine, which stops spraying paint atomizing air from an air nozzle when changing a paint color and also supplies a cleaning liquid to a paint supply path, when the cleaning liquid is supplied, A method for cleaning an air atomizing electrostatic coating machine, characterized in that purging air having a lower pressure than the paint atomizing air is injected from the air nozzle. 2. An air nozzle is provided near the tip of the paint supply route, a paint atomization air route for supplying paint atomization air is connected to the air nozzle, and a cleaning liquid supply source is connected to the paint supply route via a switching means. In the cleaning device for an air atomization type electrostatic coating machine, the purging air supply path supplies purging air of lower pressure than the paint atomization air to the air nozzle, switchable with the paint atomization air path. A cleaning device for an air atomization type electrostatic coating machine, characterized by a combination of
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53149260A JPS5844032B2 (en) | 1978-12-02 | 1978-12-02 | Cleaning method and device for air atomization electrostatic coating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53149260A JPS5844032B2 (en) | 1978-12-02 | 1978-12-02 | Cleaning method and device for air atomization electrostatic coating machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5575756A JPS5575756A (en) | 1980-06-07 |
| JPS5844032B2 true JPS5844032B2 (en) | 1983-09-30 |
Family
ID=15471356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53149260A Expired JPS5844032B2 (en) | 1978-12-02 | 1978-12-02 | Cleaning method and device for air atomization electrostatic coating machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5844032B2 (en) |
-
1978
- 1978-12-02 JP JP53149260A patent/JPS5844032B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5575756A (en) | 1980-06-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4902352A (en) | Paint color change system | |
| CA2061069A1 (en) | Method of electrostatically spray-coating a workpiece with paint | |
| JPS59127671A (en) | Automatic washer for gun nozzle of coating robot | |
| JPS61107976A (en) | Method and apparatus for washing spray head for rotary atomizing type painting apparatus | |
| JPS5844032B2 (en) | Cleaning method and device for air atomization electrostatic coating machine | |
| JPH091004A (en) | Airless spray coating method for automobile outer panels and spray gun for spray coating | |
| JPH03267164A (en) | Coating system and coating device | |
| JPH09262518A (en) | Paint gun cleaning equipment | |
| JPH0137717Y2 (en) | ||
| JPH0237225B2 (en) | ||
| JPH10151385A (en) | Paint supply method and coating equipment | |
| JPH0290963A (en) | Device for changing color in coating | |
| JPH04363171A (en) | Electrostatic coating method | |
| JPS61129058A (en) | Apparatus for washing cap of painting gun | |
| JPH0225497Y2 (en) | ||
| JPS61283370A (en) | Method and apparatus for controlling paint spray width of painting spray gun | |
| SU1166836A1 (en) | Apparatus for applying the coatings | |
| JPH0338907B2 (en) | ||
| JPH04156967A (en) | Method and device for color changing of coating gun | |
| JP2626984B2 (en) | Nozzle skinning prevention method and apparatus | |
| JP3213150B2 (en) | Electrostatic coating method of metallic paint | |
| JPH0544246U (en) | Rotary atomizing spray coating equipment | |
| JPH11128788A (en) | Air spray gun | |
| JPS591096B2 (en) | spray gun device | |
| JPH07275744A (en) | Spray coating device |