JPH0474061B2 - - Google Patents
Info
- Publication number
- JPH0474061B2 JPH0474061B2 JP61060093A JP6009386A JPH0474061B2 JP H0474061 B2 JPH0474061 B2 JP H0474061B2 JP 61060093 A JP61060093 A JP 61060093A JP 6009386 A JP6009386 A JP 6009386A JP H0474061 B2 JPH0474061 B2 JP H0474061B2
- Authority
- JP
- Japan
- Prior art keywords
- paint
- rotary atomizing
- atomizing head
- contact surface
- curing agent
- 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 - Lifetime
Links
- 239000003973 paint Substances 0.000 claims description 228
- 239000007788 liquid Substances 0.000 claims description 83
- 238000009503 electrostatic coating Methods 0.000 claims description 22
- 238000000889 atomisation Methods 0.000 claims description 18
- 238000010422 painting Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 2
- 239000003795 chemical substances by application Substances 0.000 description 132
- 239000000463 material Substances 0.000 description 17
- 238000004140 cleaning Methods 0.000 description 16
- 239000004925 Acrylic resin Substances 0.000 description 13
- 229920000178 Acrylic resin Polymers 0.000 description 13
- 238000000576 coating method Methods 0.000 description 12
- 239000011248 coating agent Substances 0.000 description 11
- 239000012948 isocyanate Substances 0.000 description 7
- 150000002513 isocyanates Chemical class 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- 239000001054 red pigment Substances 0.000 description 6
- 239000012463 white pigment Substances 0.000 description 6
- 239000012459 cleaning agent Substances 0.000 description 4
- 238000007610 electrostatic coating method Methods 0.000 description 4
- 239000004848 polyfunctional curative Substances 0.000 description 4
- 239000010419 fine particle Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 229920000877 Melamine resin Polymers 0.000 description 2
- 229920000180 alkyd Polymers 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000007591 painting process Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 230000005686 electrostatic field Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000008674 spewing Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 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
- 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
- B05B3/1057—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 with at least two outlets, other than gas and cleaning fluid outlets, for discharging, selectively or not, different or identical liquids or other fluent materials on the rotating element
-
- 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
- B05B3/1007—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 characterised by the rotating member
- B05B3/1014—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 characterised by the rotating member with a spraying edge, e.g. like a cup or a bell
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- 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、液体塗料を回転霧化ヘツドを用いて
霧化放散し、静電作用を利用して、霧化された塗
料を被塗装体に付着させる回転霧化静電塗装装置
及びそれを使用した静電塗装方法に関する。Detailed Description of the Invention (Industrial Application Field) The present invention atomizes and disperses liquid paint using a rotating atomizing head, and uses electrostatic action to spread the atomized paint onto the object to be coated. The present invention relates to a rotary atomizing electrostatic coating device for coating materials and an electrostatic coating method using the same.
（従来の技術）
自動車の車体の表面に、その全体に亙つて均一
に塗料を塗布する塗装を施す場合等において、静
電塗装装置が用いられる。斯かる静電塗装装置が
用いられての塗装、即ち、静電塗装にあつては、
被塗装体とそれに対向配置された塗料を霧化放散
する噴霧器との間に直流高電圧を印加して静電界
を形成し、噴霧器から霧化放散された塗料を帯電
させ、静電吸着作用を利用して被塗装体に付着さ
せる。このような静電塗装の採用により、被塗装
体に対する塗料の付着効率を向上させることがで
き、従つて、塗料のロスを低減できることにな
る。(Prior Art) An electrostatic coating device is used when painting the surface of an automobile body by applying paint uniformly over the entire surface. In the case of painting using such an electrostatic coating device, that is, electrostatic painting,
A high DC voltage is applied between the object to be painted and a sprayer placed opposite to it that atomizes and disperses the paint to form an electrostatic field, and the paint atomized and dispersed from the sprayer is charged, causing an electrostatic adsorption effect. Use it to attach it to the object to be painted. By employing such electrostatic coating, it is possible to improve the adhesion efficiency of paint to the object to be painted, and therefore, it is possible to reduce loss of paint.
斯かる静電塗装が行われる際、被塗装体が金属
である場合には、通常、メラミンアルキド樹脂系
塗料等の焼付け乾燥型の塗料が用いられる。被塗
装体に塗布された焼付け乾燥型の塗料は、例え
ば、140℃程度の加温雰囲気中で硬化せしめられ
る。これに対し、被塗装体がプラスチツクス等の
耐熱性が比較的低い材料から成るものである場合
には、例えば、アクリル樹脂の塗料主剤と硬化剤
とから成る二液型塗料が用いられる。そして、被
塗装体に塗布された二液型塗料は、一般に、常温
で乾燥及び硬化するものとされ、良好な被塗装体
に対する付着性が得られて、塗装面が光沢、硬度
及び耐候性に優れたものとなる。 When such electrostatic coating is performed, if the object to be coated is metal, a bake-drying paint such as a melamine alkyd resin paint is usually used. The bake-dry paint applied to the object to be painted is cured in a heated atmosphere of, for example, about 140°C. On the other hand, when the object to be painted is made of a material with relatively low heat resistance, such as plastics, a two-component paint consisting of an acrylic resin paint base and a curing agent is used, for example. The two-component paint applied to the object to be painted generally dries and hardens at room temperature, providing good adhesion to the object and giving the painted surface gloss, hardness, and weather resistance. It will be excellent.
上述の如くの利点を有する二液型塗料は、塗料
主剤と硬化剤とが混合された状態とされると比較
的短時間で硬化が生じるため、一般に、塗料主剤
と硬化剤とが別個に用意され、被塗装体に対する
塗装が施される直前に混合されるものとなされ
る。従つて、斯かる二液型塗料が用いられての静
電塗装が行われるにあたつては、通常、塗料主剤
と硬化剤とを混合するミキサが設けられ、塗料主
剤と硬化剤とがミキサによつて混合された後に噴
霧器に供給されて、噴霧器による二液型塗料の霧
化放散が行われるようにされる。このため、塗料
主剤の色替えが要求される場合には、ミキサに新
たな色の塗料主剤と硬化剤とを供給するに先立
ち、ミキサ内に付着した従前の二液型塗料を除去
すべくミキサの洗浄を行うことが必要とされ、一
貫した塗装作業工程において、ミキサの洗浄に費
やされる時間的なロスが比較的大となつてしまう
問題がある。 Two-component paints, which have the advantages mentioned above, cure in a relatively short time when the paint base and curing agent are mixed, so generally, the paint base and curing agent are prepared separately. and mixed immediately before applying the coating to the object to be coated. Therefore, when performing electrostatic painting using such a two-component paint, a mixer is usually provided to mix the paint base and the hardening agent; After mixing, the two-component paint is supplied to an atomizer, and the two-component paint is atomized and dispersed by the atomizer. Therefore, when a color change of the paint base is required, before supplying the new color paint base and curing agent to the mixer, the mixer must be used to remove the old two-component paint that has adhered to the mixer. There is a problem in that the amount of time wasted in cleaning the mixer becomes relatively large in a consistent painting process.
このため、例えば、特開昭57−45370号公報あ
るいは特開昭59−228960号公報にも記載されてい
る如く、直流高電圧が印加されるとともに高速で
回転するベル型の回転霧化ヘツドを備え、この回
転霧化ヘツドの内周面に対して複数のノズルから
二液型塗料を成す塗料主剤及び硬化剤を夫々供給
するようになして、回転霧化ヘツド内で塗料主剤
と硬化剤とを混合させ、それによつて得られる二
液型塗料を回転霧化ヘツドの回転による遠心力に
よつて霧化放散させるものとされた、噴霧器及び
塗料主剤と硬化剤とを混合するミキサの組合せを
用いないものとされた回転霧化静電塗装装置が提
案されている。このような回転霧化静電塗装装置
においては、塗料主剤及び硬化剤を夫々供給する
主剤供給ノズル及び硬化剤供給ノズルの他に、シ
ンナー等の洗浄剤を供給する洗浄剤供給ノズル
が、その開口端を回転霧化ヘツドの内周面の近傍
に位置させて配される構成がとられる。そして、
塗料主剤の色替えを行うにあたつては、主剤供給
ノズル及び硬化剤供給ノズルからの塗料主剤及び
硬化剤の供給を停止した後、洗浄剤供給ノズルか
ら供給される洗浄剤によつて回転霧化ヘツドの内
周面の洗浄が行われて、塗料主剤の色替えのため
の準備がなされ、塗料主剤の色替えに伴う塗装作
業工程中の時間的なロスが著しく低減される。 For this reason, for example, as described in JP-A No. 57-45370 or JP-A No. 59-228960, a bell-shaped rotary atomizing head that rotates at high speed while applying a DC high voltage is used. The main paint component and the curing agent constituting the two-component paint are supplied from a plurality of nozzles to the inner circumferential surface of the rotary atomizing head, so that the main paint component and the curing agent are mixed in the rotary atomizing head. A combination of an atomizer and a mixer for mixing a paint base ingredient and a curing agent is used. A rotary atomization electrostatic coating device has been proposed that does not require the use of rotary atomization. In such a rotary atomization electrostatic coating device, in addition to a main agent supply nozzle and a curing agent supply nozzle that supply a paint base agent and a curing agent, respectively, a cleaning agent supply nozzle that supplies a cleaning agent such as thinner is connected to its opening. A configuration is adopted in which the end is located near the inner circumferential surface of the rotary atomizing head. and,
When changing the color of the paint base, after stopping the supply of the paint base and curing agent from the base paint supply nozzle and curing agent supply nozzle, a rotating mist is created using the cleaning agent supplied from the cleaning agent supply nozzle. The inner circumferential surface of the coating head is cleaned to prepare for changing the color of the paint base, and the time loss during the painting process associated with changing the color of the paint base is significantly reduced.
（発明が解決しようとする問題点）
上述の如くの回転霧化静電塗装装置が用いられ
て被塗装体に対する塗料の塗布が行われる場合、
回転霧化ヘツドの内周面に供給された塗料主剤及
び硬化剤は、回転霧化ヘツドが高速で回転するこ
とにより生じる遠心力により瞬時に回転霧化ヘツ
ドの端縁部に達し、そこから飛散せしめられるこ
とになる。このため、主剤供給ノズル及び硬化剤
供給ノズルの夫々の開口端から回転霧化ヘツドの
内周面に別個に供給される塗料主剤及び硬化剤
が、個々に回転霧化ヘツドの端縁部から飛散せし
められることになり、その結果、回転霧化ヘツド
により塗料主剤と硬化剤とが適正に混合されて霧
化放散される状態が得られない事態が生じる虞が
ある。そして、塗料主剤と硬化剤とが霧化状態に
おいて適正に混合されていない場合には、それら
の塗料主剤及び硬化剤が付着することになる被塗
装体が、その塗装面に部分的な塗料主剤あるいは
硬化剤の過下足が生じ、そのため、塗装面の光
沢、硬度及び耐候性等に斑を伴うものとなつてし
まうという不都合がある。(Problems to be Solved by the Invention) When a rotary atomizing electrostatic coating device as described above is used to apply paint to an object to be coated,
The paint base agent and curing agent supplied to the inner peripheral surface of the rotary atomizing head instantly reach the edge of the rotary atomizing head due to the centrifugal force generated by the high speed rotation of the rotary atomizing head, and are scattered from there. You will be forced to do so. Therefore, the paint base agent and curing agent, which are separately supplied to the inner peripheral surface of the rotary atomizing head from the opening ends of the base agent supply nozzle and the curing agent supply nozzle, are individually scattered from the edge of the rotary atomizing head. As a result, there is a possibility that the rotary atomizing head may not be able to properly mix the paint base material and the curing agent and atomize and disperse them. If the paint base material and hardening agent are not properly mixed in the atomized state, the paint base material and hardening agent may partially adhere to the paint surface of the object to be painted. Alternatively, there is an inconvenience that too much of the curing agent occurs, resulting in unevenness in the gloss, hardness, weather resistance, etc. of the painted surface.
そこで、例えば、主剤供給ノズルと硬化剤供給
ノズルとを、夫々の開口端が、回転霧化ヘツドの
内周面の近傍において、回転霧化ヘツドの回転軸
線に直交する方向に重ねられて階層を形成するも
のとなるように配し、夫々から供給される塗料主
剤及び硬化剤とを回転霧化ヘツドの内周面上の略
同一位置に衝突せしめるようにして、塗料主剤と
硬化剤とが適正に混合されて霧化放散される状態
を得ようとすることが考えられる。しかしなが
ら、斯かる場合には、主剤供給ノズル及び硬化剤
供給ノズルの夫々の開口端が相互隣接状態におか
れ、両開口端において塗料主剤と硬化剤との反応
による硬化が生じ、それにより、主剤供給ノズル
の開口端からの塗料主剤の適正な噴出及び硬化剤
供給ノズルの開口端からの硬化剤の適正な噴出が
妨げられる事態が生じる虞がある。また、さら
に、主剤供給ノズル及び硬化剤供給ノズルの夫々
の開口端が相互隣接状態におかれることにより、
主剤供給ノズルの開口端が硬化剤による「汚れ」
を受けるとともに硬化剤供給ノズルの開口端が塗
料主剤による「汚れ」を受ける結果となる虞もあ
る。 Therefore, for example, the base agent supply nozzle and the curing agent supply nozzle are layered so that their respective open ends are overlapped in the direction perpendicular to the rotational axis of the rotary atomization head in the vicinity of the inner peripheral surface of the rotary atomization head. The main paint material and hardening agent supplied from each atomizer are arranged so that they collide at approximately the same position on the inner circumferential surface of the rotary atomizing head, so that the paint main material and hardening agent are properly distributed. It is conceivable to try to obtain a state in which the substances are mixed together and atomized and dispersed. However, in such a case, the opening ends of the main agent supply nozzle and the curing agent supply nozzle are placed adjacent to each other, and curing occurs at both opening ends due to the reaction between the paint main agent and the curing agent, and as a result, the main agent There is a possibility that a situation may occur in which the proper ejection of the paint base material from the open end of the supply nozzle and the proper ejection of the curing agent from the open end of the curing agent supply nozzle are hindered. Furthermore, by placing the respective open ends of the main agent supply nozzle and the curing agent supply nozzle in a mutually adjacent state,
The opening end of the base material supply nozzle is "stained" by the curing agent.
At the same time, there is a possibility that the opening end of the curing agent supply nozzle may be "smudged" by the paint base material.
斯かる点に鑑み、本発明は、回転霧化ヘツドに
対して塗料主剤と硬化剤とを、あるいは、複数種
の塗料を個別に設けられた複数の供給ノズルを通
じて供給して、それらを回転霧化ヘツドから飛散
せしめるにあたり、回転霧化ヘツドにより塗料主
剤と硬化剤とが、もしくは、複数種の塗料が適正
に混合されて霧化放散される状態が得られ、それ
により、被塗装体に対する塗料の塗布が一様に行
われて、被塗装体の塗装面が光沢、硬度及び耐候
性等における斑のない優れたものとなるようにす
ることができるとともに、複数の供給ノズルから
の塗料主剤及び硬化剤もしくは複数種の塗料の適
正な供給を確保でき、あるいは、複数の供給ノズ
ルの夫々における開口端の「汚れ」を低減できる
ものとされた回転霧化静電塗装装置及びそれを使
用した静電塗装方法を提供することを目的とす
る。 In view of the above, the present invention supplies a paint base material and a curing agent, or a plurality of types of paints, to a rotary atomization head through a plurality of individually provided supply nozzles, and then atomizes them into a rotary atomization head. When spraying from the atomizing head, the rotary atomizing head creates a state in which the main paint agent and curing agent, or multiple types of paints, are properly mixed and atomized and dispersed. The coating is uniformly applied, and the coating surface of the object to be coated has excellent gloss, hardness, weather resistance, etc., with no unevenness. A rotary atomizing electrostatic coating device that is capable of ensuring proper supply of a curing agent or multiple types of paint, or reducing "fouling" at the opening end of each of multiple supply nozzles, and an electrostatic coating device using the same. The purpose is to provide an electrocoating method.
（問題点を解決するための手段）
上述の目的を達成すべく、本発明に係る回転霧
化静電塗装装置は、塗料を霧化放散する開放端を
有したカツプ内面状の接液面を備える回転霧化ヘ
ツドと、回転霧化ヘツドを接液面により包囲され
る回転軸線をもつて回転するものとすべく駆動す
る回転駆動手段と、回転霧化ヘツド内に臨むもの
とされた開口端を有して設けられ、回転霧化ヘツ
ドにおける接液面に塗料を供給する複数の供給ノ
ズルとを備え、複数の供給ノズルが、各々が有す
る開口端を回転霧化ヘツドの接液面の近傍におい
てその接液面に対向させる状態をもつて配され、
夫々の開口端が、相互間に所定の間隔をおく位置
をとるとともに、各々から噴出する塗料もしくは
塗料を構成する液剤を接液面に到達する以前に空
間において合流させるべく所定の方向に指向せし
められて、構成される。(Means for Solving the Problems) In order to achieve the above-mentioned object, the rotary atomizing electrostatic coating device according to the present invention has a liquid-contacting surface in the form of an inner surface of a cup having an open end for atomizing and dispersing paint. a rotary atomizing head, a rotary drive means for driving the rotary atomizing head to rotate with a rotational axis surrounded by a liquid contact surface, and an open end facing into the rotary atomizing head. and a plurality of supply nozzles that supply paint to the liquid contact surface of the rotary atomization head, each of the plurality of supply nozzles having an open end near the liquid contact surface of the rotary atomization head. is placed so as to face its wetted surface,
The respective opening ends are positioned at a predetermined distance from each other, and are directed in a predetermined direction so that the paint or the liquid forming the paint spouted from each end merges in the space before reaching the surface in contact with the liquid. constructed and constructed.
また、本発明に係る静電塗装方法は、開放端を
有したカツプ内面状の接液面を備える回転霧化ヘ
ツドを接液面により包囲される回転軸線をもつて
回転させ、回転霧化ヘツド内に臨むものとされた
開口端を有して設けられた複数の供給ノズルを通
じて、回転状態にある回転霧化ヘツドにおける接
液面に塗料を供給し、回転霧化ヘツドの接液面の
近傍においてその接液面に対向せしめられ、相互
間に所定の間隔をおく位置をとるとともに所定の
方向に指向せしめられた複数の供給ノズルの夫々
の開口端から噴出する塗料もしくは塗料を構成す
る液剤を、接液面に到達する以前に空間において
合流させ、合流させた状態をもつて回転状態にあ
る接液面における共通の位置に衝突させて、その
接液面の開放端から霧化放散させることにより被
塗装体に付着させるものとされる。 Further, the electrostatic coating method according to the present invention includes rotating a rotary atomizing head having a liquid contact surface shaped like the inner surface of a cup having an open end about a rotation axis surrounded by the liquid contact surface. Paint is supplied to the liquid-contacting surface of the rotary atomizing head in a rotating state through a plurality of supply nozzles provided with opening ends facing inward, and the paint is supplied to the liquid-contacting surface of the rotary atomizing head in the vicinity of the liquid-contacting surface of the rotary atomizing head. A plurality of supply nozzles are placed opposite to the liquid contact surface of the container, are spaced from each other at a predetermined distance, and are oriented in a predetermined direction. , to merge in a space before reaching the wetted surface, collide the merged state at a common position on the rotating wetted surface, and atomize and disperse from the open end of the wetted surface. It is assumed that the coating material is adhered to the object to be coated.
（作用）
上述の如くに構成される本発明に係る回転霧化
静電塗装装置及びそれを使用した静電塗装方法に
おいては、駆動手段によつて回転駆動される回転
霧化ヘツドの接液面に対して、複数種の塗料を構
成する液剤、例えば、塗料主剤と硬化剤、あるい
は、複数種の塗料の夫々が、複数の供給ノズルの
夫々の開口端から個別に、かつ、同時に供給され
る。このとき、複数の供給ノズルの夫々の開口端
が、接液面の近傍において相互間に所定の間隔を
もつて配されて、各開口端から噴出され、接液面
に到達する以前に空間において合流された塗料
が、合流した状態をもつて接液面に供給されるよ
うになされるので、複数の供給ノズルの夫々の開
口端から噴出される塗料主剤と硬化剤とが各供給
ノズルの開口端においてそれらの反応による硬化
を生じることなく接液面上の略同一位置に衝突せ
しめられ、また、複数の供給ノズルの夫々の開口
端から噴出される複数種の塗料が、各供給ノズル
の開口端に「汚れ」を発生させることなく接液面
上の略同一位置に衝突せしめられることになり、
衝突後、接液面上を回転霧化ヘツドの回転軸線に
直交する方向に重なる夫々の層を形成しつつ接液
面の開放端に向かつて移動する。そして、接液面
上で例えば２重層を形成した塗料主剤及び硬化
剤、あるいは、接液面上で多重層を形成した複数
種の塗料は、２重層あるいは多重層を形成した状
態で接液面の開放端から霧化放散される。それに
より、霧化された塗料の微粒子の各々が２重層も
しくは多重層を形成するものとなり、その結果、
回転霧化ヘツドにより塗料主剤と硬化剤とが、も
しくは、複数種の塗料が適正に混合されて霧化放
散される状態が得られ、被塗装体に対する塗料の
塗布が均一に行われることになる。(Function) In the rotary atomizing electrostatic coating device and the electrostatic coating method using the same according to the present invention configured as described above, the liquid contacting surface of the rotary atomizing head rotationally driven by the driving means. On the other hand, liquid agents constituting multiple types of paints, such as a paint main agent and a curing agent, or each of multiple types of paints, are individually and simultaneously supplied from the respective opening ends of multiple supply nozzles. . At this time, the opening ends of each of the plurality of supply nozzles are arranged at a predetermined distance from each other near the liquid contact surface, and the jet is ejected from each opening end and flows into the space before reaching the liquid contact surface. Since the combined paint is supplied to the wetted surface in a merged state, the paint main agent and curing agent ejected from the opening ends of each of the plurality of supply nozzles are connected to the opening of each supply nozzle. The plurality of paints are made to collide at approximately the same position on the wetted surface without causing curing due to reactions at the ends, and the plurality of paints ejected from the respective opening ends of the plurality of supply nozzles are This allows the liquid to collide at approximately the same location on the wetted surface without causing any "dirt" on the edge.
After the collision, the particles move toward the open end of the liquid contact surface while forming respective layers that overlap in a direction perpendicular to the rotational axis of the rotary atomizing head on the liquid contact surface. For example, the paint main agent and curing agent that form a double layer on the liquid contact surface, or multiple types of paints that form multiple layers on the liquid contact surface, are Atomization is emitted from the open end of the As a result, each of the atomized paint particles forms a double layer or multiple layers, and as a result,
The rotary atomizing head allows the main paint and curing agent, or multiple types of paint, to be properly mixed and atomized and dispersed, resulting in uniform application of the paint to the object to be painted. .
（実施例）
以下、本発明の実施例について図面を参照して
説明する。(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.
第２図は、本発明に係る回転霧化静電塗装装置
の一例を概略的に示す。 FIG. 2 schematically shows an example of a rotary atomization electrostatic coating device according to the present invention.
第２図に示される例においては、回転霧化ヘツ
ド２が、カツプ状部４及びカツプ状部４の中央部
に設けられたハブ６から構成されている。カツプ
状部４は、大径開口端部４ａ及び小径開口端部４
ｂを有し、それらの間におけるカツプ状内周面が
接液面５とされている。そして、カツプ状部４の
大径開口端部４ａの内面側が、接液面５の開放端
とされている。カツプ状部４とハブ６との接続部
には、多数の透孔８が形成されている。また、ハ
ブ６におけるカツプ状部４の小径開口端部４ｂ側
に位置する端部には、回転霧化ヘツド２を回転駆
動するためのエアモータ１１の、小径開口端部４
ｂを介してカツプ状部４内に伸びる回転軸１２が
接続されている。このエアモータ１１によつて、
回転霧化ヘツド２は、カツプ状部４の接液面５に
包囲され、ハブ６及び回転軸１２の中央部を貫通
する回転軸線をもつて、高速で回転される。 In the example shown in FIG. 2, the rotary atomizing head 2 is comprised of a cup-shaped portion 4 and a hub 6 provided in the center of the cup-shaped portion 4. In the example shown in FIG. The cup-shaped portion 4 has a large-diameter opening end 4a and a small-diameter opening end 4.
b, and the cup-shaped inner circumferential surface between them is the liquid contact surface 5. The inner surface of the large-diameter open end 4a of the cup-shaped portion 4 is the open end of the liquid contact surface 5. A large number of through holes 8 are formed at the connection portion between the cup-shaped portion 4 and the hub 6. Further, at the end of the cup-shaped portion 4 of the hub 6 located on the small-diameter open end 4b side, there is provided a small-diameter open end 4 of an air motor 11 for rotationally driving the rotary atomizing head 2.
A rotating shaft 12 extending into the cup-shaped portion 4 is connected via b. By this air motor 11,
The rotary atomizing head 2 is surrounded by the liquid contact surface 5 of the cup-shaped portion 4 and is rotated at high speed with a rotation axis passing through the hub 6 and the center of the rotating shaft 12.
エアモータ１１には、ブラケツト１４が固定さ
れており、ブラケツト１４の所定位置には、塗料
供給ノズル部１６が、その開口部１７をカツプ状
部４の小径開口端部４ｂを通じて接液面５に近接
せしめて、取り付けられている。この塗料供給ノ
ズル部１６には、塗料供給用パイプ２０ａ及び２
０ｂの夫々の一端及び硬化剤供給用パイプ２０ｃ
の一端が接続されている。塗料供給用パイプ２０
ａ及び２０ｂは、夫々、流量調整器２２及び２
３、及び、ポンプ２６及び２７が設けられて、そ
れらの他端が塗料槽３２及び３３内に挿入される
ものとなされている。また、硬化剤供給用パイプ
２０ｃは、流量調整器２４及びポンプ２８が設け
られて、その他端が硬化剤槽３４内に挿入される
ものとなされている。 A bracket 14 is fixed to the air motor 11, and at a predetermined position of the bracket 14, a paint supply nozzle section 16 is arranged such that its opening 17 approaches the liquid contact surface 5 through the small-diameter open end 4b of the cup-shaped section 4. At least it's installed. This paint supply nozzle section 16 includes paint supply pipes 20a and 2.
0b and a hardening agent supply pipe 20c
is connected at one end. Paint supply pipe 20
a and 20b are flow rate regulators 22 and 2, respectively.
3, and pumps 26 and 27, the other ends of which are inserted into paint tanks 32 and 33. Further, the curing agent supply pipe 20c is provided with a flow rate regulator 24 and a pump 28, and the other end is inserted into the curing agent tank 34.
塗料槽３２及び３３には、異種の塗料主剤ある
いは塗料が貯留され、例えば、塗料槽３２に赤色
顔料を含むアクリル樹脂系塗料から成る塗料主剤
が貯留されて、塗料槽３３に白色顔料を含むアク
リル樹脂系塗料から成る塗料主剤が貯留される。
また、硬化剤槽３４内には、例えば、イソシアネ
ート系の硬化剤が貯留される。そして、流量調整
器２２〜２４は、塗料供給用パイプ２０ａ及び２
０ｂ内を流れる塗料主剤、及び、硬化剤供給用パ
イプ２０ｃ内を流れる硬化剤の量の調整を夫々独
立に行うことができるものとされている。 Different types of paint bases or paints are stored in the paint tanks 32 and 33. For example, the paint tank 32 stores a paint base made of an acrylic resin paint containing a red pigment, and the paint tank 33 stores an acrylic resin paint containing a white pigment. A paint base consisting of resin paint is stored.
Further, in the curing agent tank 34, for example, an isocyanate-based curing agent is stored. The flow rate regulators 22 to 24 are connected to the paint supply pipes 20a and 2.
It is possible to independently adjust the amount of the paint base material flowing through the pipe 0b and the amount of the curing agent flowing within the curing agent supply pipe 20c.
さらに、ブラケツト１４には、洗浄液供給ノズ
ル１８が、その開口端１８ａをカツプ状部４の小
径開口端部４ｂを通じて接液面５に近接せしめ
て、取り付けられている。この洗浄液供給ノズル
１８には、洗浄液供給用パイプ３５の一端が連結
されており、洗浄液供給用パイプ３５は、流量調
整器３６及びポンプ３７が設けられ、その他端
が、シンナー等の洗浄液が貯留された洗浄液槽３
８内に挿入されるものとなされている。 Further, a cleaning liquid supply nozzle 18 is attached to the bracket 14 with its open end 18a brought close to the liquid contact surface 5 through the small diameter open end 4b of the cup-shaped portion 4. One end of a cleaning liquid supply pipe 35 is connected to the cleaning liquid supply nozzle 18, and the cleaning liquid supply pipe 35 is provided with a flow rate regulator 36 and a pump 37, and the other end is used to store cleaning liquid such as thinner. Cleaning liquid tank 3
8.
第１図Ａ及びＢは、上述の塗料供給ノズル部１
６及びその周囲を拡大して示す。この第１図Ａ及
びＢに示される塗料供給ノズル部１６の具体的一
例においては、塗料供給ノズル部１６が、塗料供
給ノズル１６ａ及び１６ｂと硬化剤供給ノズル１
６ｃとで構成されており、塗料供給ノズル１６ａ
及び１６ｂ及び硬化剤供給ノズル１６ｃは、
夫々、塗料供給用パイプ２０ａ及び２０ｂ及び硬
化剤供給用パイプ２０ｃの各々の一端に連結され
ている。そして、これら塗料供給ノズル１６ａ及
び１６ｂと硬化剤供給ノズル１６ｃとは、回転霧
化ヘツド２におけるカツプ状部４の接液面５の近
傍において、塗料供給ノズル部１６の開口部１７
を形成する夫々の開口端１７ａ，１７ｂ及び１７
ｃが、相互間に所定の離隔距離をもつて、回転霧
化ヘツド２の回転軸線に直交する方向に重ねられ
るようにして配されている。さらに、この例にお
いては、塗料供給ノズル１６ａ及び１６ｂ及び硬
化剤供給ノズル１６ｃの夫々の先端部が、接液面
５に向うように折曲されている。このようにされ
ることにより、塗料供給ノズル１６ａ及び１６ｂ
及び硬化剤供給ノズル１６ｃの夫々の開口端１７
ａ，１７ｂ及び１７ｃから噴出される塗料主剤及
び硬化剤、あるいは、複数種の塗料は、空中で相
互に合流して、接液面５に衝突するものとされ
る。 FIGS. 1A and 1B show the above-mentioned paint supply nozzle part 1.
6 and its surroundings are shown enlarged. In a specific example of the paint supply nozzle section 16 shown in FIGS.
6c, and a paint supply nozzle 16a.
and 16b and the curing agent supply nozzle 16c,
Each is connected to one end of each of the paint supply pipes 20a and 20b and the curing agent supply pipe 20c. The paint supply nozzles 16a and 16b and the curing agent supply nozzle 16c are connected to the opening 17 of the paint supply nozzle portion 16 in the vicinity of the liquid contact surface 5 of the cup-shaped portion 4 of the rotary atomizing head 2.
The respective open ends 17a, 17b and 17 forming
c are arranged so as to be overlapped in a direction perpendicular to the axis of rotation of the rotary atomizing head 2 with a predetermined distance between them. Further, in this example, the tips of each of the paint supply nozzles 16a and 16b and the curing agent supply nozzle 16c are bent toward the liquid contact surface 5. By doing this, the paint supply nozzles 16a and 16b
and each open end 17 of the curing agent supply nozzle 16c.
The paint main agent and curing agent or multiple types of paints jetted from a, 17b, and 17c merge with each other in the air and collide with the liquid contact surface 5.
なお、図示されていないが、カツプ状部４及び
ハブ６から成る回転霧化ヘツド２と被塗装体との
間には、例えば、回転霧化ヘツド２側を負極側と
する直流高電圧が印加されるようになされてい
る。 Although not shown, for example, a DC high voltage is applied between the rotary atomizing head 2, which is composed of the cup-shaped portion 4 and the hub 6, and the object to be coated, with the rotary atomizing head 2 side being the negative pole side. It is made to be done.
上述の如くの構成のもとに、被塗装体に対する
塗装が行われるにあたつては、先ず、エアモータ
１１が作動せしめられ、回転霧化ヘツド２が、上
述されたカツプ状部４の接液面５に包囲され、ハ
ブ６及び回転軸１２の中央部に貫通する回転軸線
をもつて、例えば、20000〜30000rpmの回転数で
回転する状態とされる。このとき、回転霧化ヘツ
ド２には、被塗装体を基準にして、例えば、−
90kVの電位を有するものとなるように、直流高
電圧が印加される。 When the object to be coated is coated with the above-described configuration, first, the air motor 11 is activated, and the rotary atomizing head 2 is moved to the above-mentioned cup-shaped portion 4 in contact with the liquid. It is surrounded by the surface 5, has a rotation axis passing through the center of the hub 6 and the rotation shaft 12, and rotates at a rotation speed of, for example, 20,000 to 30,000 rpm. At this time, the rotary atomizing head 2 has, for example, -
A high DC voltage is applied so that the potential is 90 kV.
斯かる状態において、例えば、ポンプ２７及び
２８が作動せしめられ、塗料槽３３に貯留された
白色顔料を含むアクリル樹脂系塗料主剤、及び、
硬化剤槽３４に貯留されたイソシアネート系硬化
剤が、塗料供給用パイプ２０ｂ及び硬化剤供給用
パイプ２０ｃを通じて、塗料供給ノズル部１６に
おける塗料供給ノズル１６ｂ及び硬化剤供給ノズ
ル１６ｃに導かれる。その際、塗料主剤と硬化剤
との重量比が３：１となるように流量調整器２３
及び２４による調量が行われる。 In such a state, for example, the pumps 27 and 28 are activated, and the acrylic resin paint base containing the white pigment stored in the paint tank 33 and
The isocyanate curing agent stored in the curing agent tank 34 is guided to the paint supply nozzle 16b and curing agent supply nozzle 16c in the paint supply nozzle section 16 through the paint supply pipe 20b and the curing agent supply pipe 20c. At that time, the flow rate regulator 23
and 24 are measured.
そして、塗料供給ノズル部１６における塗料供
給ノズル１６ｂ及び硬化剤供給ノズル１６ｃに
夫々導かれた塗料主剤及び硬化剤は、塗料供給ノ
ズル１６ｂの開口端１７ｂ及び硬化剤供給ノズル
１６ｃの開口端１７ｃから同時に噴出され、高速
で回転する回転霧化ヘツド２におけるカツプ状部
４の接液面５に対して供給される。このとき、塗
料供給ノズル１６ｂの開口端１７ｂから噴出する
塗料主剤と、硬化剤供給ノズル１６ｃの開口端１
７ｃから噴出する硬化剤とが、空中で相互に合流
した後、回動する接液面５に衝突せしめられるこ
とになり、塗料供給ノズル１６ｂの開口端１７ｂ
と、硬化剤供給ノズル１６ｃの開口端１７ｃとは
離隔しているので、開口端１７ｂ及び１７ｃの位
置で塗料主剤と硬化剤とが反応して硬化するとい
う事態は生じない。 The paint main agent and curing agent respectively guided to the paint supply nozzle 16b and curing agent supply nozzle 16c in the paint supply nozzle section 16 are simultaneously supplied from the opening end 17b of the paint supply nozzle 16b and the opening end 17c of the curing agent supply nozzle 16c. The liquid is ejected and supplied to the liquid contact surface 5 of the cup-shaped portion 4 of the rotary atomizing head 2 rotating at high speed. At this time, the paint main agent spouted from the opening end 17b of the paint supply nozzle 16b and the opening end 1 of the curing agent supply nozzle 16c.
After the curing agent ejected from the paint supply nozzle 16b merges with each other in the air, it collides with the rotating liquid contact surface 5, and the opening end 17b of the paint supply nozzle 16b
Since this is separated from the opening end 17c of the curing agent supply nozzle 16c, a situation where the paint base material and the curing agent react and harden at the positions of the opening ends 17b and 17c does not occur.
このようにみて、回動する接液面５上の略同一
位置に衝突せしめられた塗料主剤と硬化剤とは、
その後、接液面５に沿つて移動せしめられて、カ
ツプ状部４とハブ６との接続部に形成された多数
の透孔８を介してカツプ状部４の大径開口端部４
ａに向かう流れを形成する。そして、斯かる接液
面５上の略同一位置に衝突せしめられて接液面５
に沿つて流れる塗料主剤及び硬化剤は、回転霧化
ヘツド２の高速回転に伴う遠心力の作用を受け
て、第２図に示される如くに、接液面５上におい
て、例えば、両者のうちで比重が大である塗料主
剤が接液面５に接する層Faを形成し、比重が小
である硬化剤が塗料主剤の層Faに接する層Fiを
形成する。即ち、塗料主剤及び硬化剤が、接液面
５上において回転霧化ヘツド２の回転軸線に直交
する方向に重ねられる夫々の層を形成して、接液
面５の開放端に向かつて移動していくものとなる
のである。 Viewed in this way, the paint base and curing agent collided at approximately the same position on the rotating liquid contact surface 5.
Thereafter, the large-diameter open end 4 of the cup-shaped part 4 is moved along the liquid-contacting surface 5 and passes through a large number of through holes 8 formed at the connection part between the cup-shaped part 4 and the hub 6.
Forms a flow toward a. Then, the liquid contact surface 5 is collided with substantially the same position on the liquid contact surface 5.
As shown in FIG. 2, the paint main agent and curing agent flowing along the surface are affected by the centrifugal force caused by the high-speed rotation of the rotary atomizing head 2, and as shown in FIG. The paint base material having a high specific gravity forms a layer Fa in contact with the liquid contact surface 5, and the curing agent having a low specific gravity forms a layer Fi in contact with the paint base layer Fa. That is, the paint main agent and the curing agent form respective layers stacked on the liquid contact surface 5 in a direction perpendicular to the rotational axis of the rotary atomizing head 2, and move toward the open end of the liquid contact surface 5. It will become something you will continue to do.
そして、カツプ状部４の大径開口端部４ａ、即
ち、接液面５の開放端に、層Fa及び層Fiを形成
して到達した塗料主剤及び硬化剤は、回転霧化ヘ
ツド２の高速回転に伴う遠心力により、接液面５
の開放端から、微粒子Ｒを形成して霧化放散され
る。その際、塗料主剤及び硬化剤は層Fa及び層
Fiを形成している状態のまま霧化放散されるの
で、微粒子Ｒの夫々が塗料主剤及び硬化剤の夫々
の層を含むものとなり、回転霧化ヘツド２におけ
るカツプ状部４の大径開口端部４ａから、塗料主
剤及び硬化剤とが適正に混合された状態で霧化さ
れた塗料が放散されることになる。 Then, the paint main agent and curing agent that reach the large-diameter opening end 4a of the cup-shaped portion 4, that is, the open end of the liquid contact surface 5, forming layers Fa and Fi, are transferred to the rotary atomizing head 2 at high speed. Due to the centrifugal force associated with rotation, the wetted surface 5
From the open end of , fine particles R are formed and atomized and dispersed. At that time, the paint main agent and curing agent are used in layer Fa and layer
Since the fine particles R are atomized and dispersed while still forming Fi, each of the fine particles R contains the respective layers of the paint base agent and the curing agent, and the large-diameter opening end of the cup-shaped portion 4 in the rotary atomization head 2 From the part 4a, the atomized paint in which the main paint agent and the curing agent are properly mixed is emitted.
従つて、被塗装体の表面には、白色顔料を含む
アクリル樹脂系塗料主剤とイソシアネート系硬化
剤とが３：１の重量比をもつて混合されて得られ
る塗料が均質に付着せしめられての塗装が施され
る。 Therefore, a paint obtained by mixing an acrylic resin paint base containing a white pigment and an isocyanate hardener at a weight ratio of 3:1 is uniformly adhered to the surface of the object to be painted. Paint is applied.
このようにして被塗装体に対する白色顔料を含
むアクリル樹脂系塗料主剤を用いての塗装が施さ
れた後、他の被塗装体に対する赤色顔料を含むア
クリル樹脂系塗料主剤を用いての塗装を施すべ
く、塗料主剤の色替えが行われるにあたつては、
ポンプ２７及び２８の作動が停止されて、塗料槽
３３及び硬化剤槽３４からの塗料主剤及び硬化剤
の供給が停止されるとともに、洗浄液供給用パイ
プ３５に設けられたポンプ３７が作動せしめられ
る。これにより、洗浄液槽３８に貯留されたシン
ナー等の洗浄液が、洗浄液供給用パイプ３５を通
じ、流量調整器３６を介して洗浄液供給ノズル１
８に導かれる。そして、洗浄液供給ノズル１８に
導かれた洗浄液が、洗浄液供給ノズル１８の開口
端１８ａから回転する回転霧化ヘツド２における
カツプ状部４の接液面５に供給されて、回転霧化
ヘツド２内の洗浄が行われる。 After the object to be painted is coated with an acrylic resin paint base containing a white pigment, the other objects to be painted are painted using an acrylic resin paint base containing a red pigment. Therefore, when changing the color of the paint base,
The operation of the pumps 27 and 28 is stopped, and the supply of the paint main agent and curing agent from the paint tank 33 and the curing agent tank 34 is stopped, and the pump 37 provided in the cleaning liquid supply pipe 35 is activated. As a result, the cleaning liquid such as thinner stored in the cleaning liquid tank 38 is supplied to the cleaning liquid supply nozzle 1 through the cleaning liquid supply pipe 35 and the flow rate regulator 36.
8. Then, the cleaning liquid guided to the cleaning liquid supply nozzle 18 is supplied from the opening end 18a of the cleaning liquid supply nozzle 18 to the liquid contact surface 5 of the cup-shaped part 4 of the rotating rotary atomizing head 2, and the inside of the rotary atomizing head 2 is supplied. cleaning is performed.
その後、ポンプ３７の作動が停止されるととも
にポンプ２６及び２８が作動せしめられ、塗料槽
３２及び硬化剤槽３４に貯留された赤色顔料を含
むアクリル樹脂系塗料主剤及びイソシアネート系
硬化剤が、塗料供給用パイプ２０ａ及び硬化剤供
給用パイプ２０ｃを通じ、流量調整器２２及び２
４による調量が行われて、塗料供給ノズル部１６
における塗料供給ノズル１６ａ及び硬化剤供給ノ
ズル１６ｃに導かれ、さらに、塗料供給ノズル１
６ａ及び硬化剤供給ノズル１６ｃに夫々導かれた
塗料主剤及び硬化剤が、塗料供給ノズル１６ａの
開口端１７ａ及び硬化剤供給ノズル１６ｃの開口
端１７ｃから同時に噴出され、高速で回転する回
転霧化ヘツド２におけるカツプ状部４の接液面５
に対して供給される。このときにも、塗料供給ノ
ズル１６ａの開口端１７ａから噴出する塗料主剤
と、硬化剤供給ノズル１６ｃの開口端１７ｃから
噴出する硬化剤とが、空中で相互に合流した後、
回動する接液面５に衝突せしめられることにな
り、塗料供給ノズル１６ａの開口端１７ａと、硬
化剤供給ノズル１６ｃの開口端１７ｃとは離隔し
ているので、開口端１７ａ及び１７ｃの位置で塗
料主剤と硬化剤とが反応して硬化するという事態
は生じない。 Thereafter, the operation of the pump 37 is stopped, and the pumps 26 and 28 are started, and the acrylic resin paint base and isocyanate hardener containing the red pigment stored in the paint tank 32 and hardener tank 34 are supplied to the paint. The flow rate regulators 22 and 2 are
4 is performed, and the paint supply nozzle section 16
The paint supply nozzle 16a and the curing agent supply nozzle 16c are further connected to the paint supply nozzle 1.
6a and the curing agent supply nozzle 16c are simultaneously ejected from the open end 17a of the paint supply nozzle 16a and the open end 17c of the curing agent supply nozzle 16c, and the rotary atomizing head rotates at high speed. Liquid contact surface 5 of cup-shaped part 4 in 2
supplied for. Also at this time, after the paint main agent jetted from the opening end 17a of the paint supply nozzle 16a and the curing agent jetted from the opening end 17c of the curing agent supply nozzle 16c merge with each other in the air,
Since the opening end 17a of the paint supply nozzle 16a and the opening end 17c of the curing agent supply nozzle 16c are separated from each other, the opening end 17a of the paint supply nozzle 16a and the opening end 17c of the curing agent supply nozzle 16c are A situation in which the paint base material and the curing agent react and harden does not occur.
従つて、この場合にも、上述の場合と同様にし
て、塗料主剤及び硬化剤が、接液面５上において
回転霧化ヘツド２の回転軸線に直交する方向に重
ねられる夫々の層を形成して接液面５の開放端に
向かつて移動していき、接液面５の開放端から霧
化放散される。それにより、回転霧化ヘツド２に
おけるカツプ状部４の大径開口端部４ａから、塗
料主剤及び硬化剤とが適正に混合された状態で霧
化された塗料が放散されることになり、被塗装体
の表面には、赤色顔料を含むアクリル樹脂系塗料
主剤とイソシアネート系硬化剤とが所定の重量比
をもつて混合されて得られる塗料が均質に付着せ
しめられての塗装が施される。 Therefore, in this case as well, the paint main agent and the curing agent form respective layers that are stacked on the liquid contact surface 5 in a direction perpendicular to the rotational axis of the rotary atomizing head 2, in the same way as in the above case. The liquid then moves toward the open end of the liquid contact surface 5, and is atomized and dispersed from the open end of the liquid contact surface 5. As a result, the atomized paint is dispersed from the large-diameter opening end 4a of the cup-shaped portion 4 in the rotary atomization head 2, with the paint main component and curing agent properly mixed. The surface of the painted body is coated with a paint obtained by mixing an acrylic resin paint base containing a red pigment and an isocyanate curing agent in a predetermined weight ratio, and uniformly adheres to the paint.
なお、第２図に示される例において、ポンプ２
６，２７及び２８が同時に作動せしめられ、塗料
槽３２及び３３に貯留された赤色顔料を含むアク
リル樹脂系塗料主剤及び白色顔料を含むアクリル
樹脂系塗料主剤、及び、硬化剤槽３４に貯留され
たイソシアネート系硬化剤が、塗料供給用パイプ
２０ａ及び２０ｂ、及び、硬化剤供給用パイプ２
０ｃを通じて、塗料供給ノズル部１６における塗
料供給ノズル１６ａ及び１６ｂ、及び、硬化剤供
給ノズル１６ｃに夫々導かれ、さらに、塗料供給
ノズル１６ａ及び１６ｂ、及び、硬化剤供給ノズ
ル１６ｃに夫々導かれた塗料主剤及び硬化剤が、
塗料供給ノズル１６ａ及び１６ｂの開口端１７ａ
及び１７ｂ、及び、硬化剤供給ノズル１６ｃの開
口端１７ｃから同時に噴出され、高速で回転する
回転霧化ヘツド２におけるカツプ状部４の接液面
５に対して供給されるようになされてもよい。斯
かる場合には、塗料供給ノズル１６ａ及び１６ｂ
の開口端１７ａ及び１７ｂから夫々噴出する塗料
主剤と、硬化剤供給ノズル１６ｃの開口端１７ｃ
から噴出する硬化剤とが、空中で相互に合流した
後、回動する接液面５に衝突せしめられることに
なる。 In addition, in the example shown in FIG.
6, 27, and 28 were operated simultaneously, and the acrylic resin paint base containing red pigment stored in paint tanks 32 and 33 and the acrylic resin paint base containing white pigment stored in hardener tank 34. The isocyanate curing agent is supplied to the paint supply pipes 20a and 20b and the curing agent supply pipe 2.
The paint is guided to the paint supply nozzles 16a and 16b and the curing agent supply nozzle 16c in the paint supply nozzle section 16 through the paint supply nozzle 0c, and further guided to the paint supply nozzles 16a and 16b and the curing agent supply nozzle 16c, respectively. The main agent and curing agent are
Open ends 17a of paint supply nozzles 16a and 16b
and 17b and the opening end 17c of the curing agent supply nozzle 16c, and may be simultaneously jetted out and supplied to the liquid contact surface 5 of the cup-shaped portion 4 in the rotary atomization head 2 rotating at high speed. . In such a case, the paint supply nozzles 16a and 16b
and the opening end 17c of the curing agent supply nozzle 16c.
After the hardening agent and the hardening agent ejected from the container merge in the air, they collide with the rotating liquid contact surface 5.
そして、斯かる場合には、塗料供給ノズル１６
ａ及び１６ｂの開口端１７ａ及び１７ｂから夫々
噴出される２種の塗料主剤が混合されたものと硬
化剤が、接液面５上において回転霧化ヘツド２の
回転軸線に直交する方向に重ねられる夫々の層を
形成して接液面５の開放端に向かつて移動してい
き、接液面５の開放端から霧化放散される。それ
により、被塗装体の表面には、赤色顔料を含むア
クリル樹脂系塗料主剤と白色顔料を含むアクリル
樹脂系塗料主剤とイソシアネート系硬化剤とが、
所定の重量比をもつて混合されて得られる塗料が
均質に付着せしめられての塗装が施される。 In such a case, the paint supply nozzle 16
A mixture of two types of paint main ingredients and a curing agent are sprayed from the open ends 17a and 17b of the a and 16b, respectively, and are superimposed on the liquid contact surface 5 in a direction perpendicular to the rotational axis of the rotary atomizing head 2. Each layer is formed and moves toward the open end of the liquid contact surface 5, and is atomized and dispersed from the open end of the liquid contact surface 5. As a result, the acrylic resin paint base containing the red pigment, the acrylic resin paint base containing the white pigment, and the isocyanate curing agent are coated on the surface of the object to be painted.
Paint is applied by uniformly adhering the paint obtained by mixing at a predetermined weight ratio.
さらに、上述の例とは異なり、第２図に示され
る例における塗料槽３２及び３３に、例えば、メ
ラミンアルキド系塗料等の赤色塗料及び白色塗料
が夫々貯蔵されるようにされ、被塗装体に対する
これら２種の塗料の混合塗装が行われるようにさ
れてもよい。 Further, unlike the above-described example, the paint tanks 32 and 33 in the example shown in FIG. 2 are configured to store red paint and white paint, such as melamine alkyd paint, respectively. Mixed coating of these two types of paints may be performed.
斯かる場合には、ポンプ２６及び２７が作動せ
しめられ、塗料槽３２及び３３に貯留された赤色
塗料及び白色塗料が、塗料供給用パイプ２０ａ及
び２０ｂを通じ、流量調整器２２及び２３による
調量が行われて、塗料供給ノズル部１６における
塗料供給ノズル１６ａ及び１６ｂに夫々導かれ、
さらに、塗料供給ノズル１６ａ及び１６ｂに導か
れた塗料の夫々が、塗料供給ノズル１６ａ及び１
６ｂの開口端１７ａ及び１７ｂから同時に噴出さ
れ、高速で回転する回転霧化ヘツド２におけるカ
ツプ状部４の接液面５に対して供給される。斯か
る場合には、塗料供給ノズル１６ａ及び１６ｂの
開口端１７ａ及び１７ｂから夫々噴出する塗料
が、空中で合流して接液面５に衝突せしめられる
ことになり、塗料供給ノズル１６ａの開口端１７
ａと、塗料供給ノズル１６ｂの開口端１７ｂとは
離隔しているので、開口端１７ａが開口端１７ｂ
から噴出する塗料による「汚れ」を受け、また、
開口端１７ｂが開口端１７ａから噴出する塗料に
よる「汚れ」を受けるという事態は生じない。 In such a case, the pumps 26 and 27 are operated, and the red paint and white paint stored in the paint tanks 32 and 33 are metered by the flow rate regulators 22 and 23 through the paint supply pipes 20a and 20b. and are guided to the paint supply nozzles 16a and 16b, respectively, in the paint supply nozzle section 16,
Furthermore, the paint introduced to the paint supply nozzles 16a and 16b is supplied to the paint supply nozzles 16a and 16b, respectively.
The liquid is simultaneously ejected from the open ends 17a and 17b of the atomizer 6b, and is supplied to the liquid contact surface 5 of the cup-shaped portion 4 in the rotary atomizing head 2 rotating at high speed. In such a case, the paint ejected from the open ends 17a and 17b of the paint supply nozzles 16a and 16b, respectively, merge in the air and collide with the wetted surface 5, causing the paint to eject from the open ends 17 of the paint supply nozzles 16a.
a and the opening end 17b of the paint supply nozzle 16b are separated, so that the opening end 17a is connected to the opening end 17b.
Receives "dirt" from paint spewing out from the
A situation in which the open end 17b receives "stain" from the paint spouted from the open end 17a does not occur.
そして、この場合には、塗料供給ノズル１６ａ
及び１６ｂの開口端１７ａ及び１７ｂから夫々噴
出される２種の塗料が、接液面５上に、その比重
に応じて、回転霧化ヘツド２の回転軸線に直交す
る方向に重ねられる夫々の層を形成して接液面５
の開放端に向かつて移動していき、接液面５の開
放端から霧化放散される。それにより、被塗装体
の表面には、赤色塗料と白色塗料とが、所定の重
量比をもつて混合されて得られる混合塗料が均質
に付着せしめられての塗装が施される。 In this case, the paint supply nozzle 16a
The two types of paint sprayed from the open ends 17a and 17b of the rotary atomizing head 2 are stacked on the liquid contact surface 5 in a direction perpendicular to the axis of rotation of the rotary atomizing head 2 according to their specific gravity. to form the wetted surface 5
The liquid moves toward the open end of the liquid contact surface 5, and is atomized and dispersed from the open end of the liquid contact surface 5. As a result, the surface of the object to be painted is coated with a mixed paint obtained by mixing red paint and white paint in a predetermined weight ratio, which is uniformly adhered to the surface.
次に、上述の如くに、２種の塗料が回転霧化ヘ
ツド２におけるカツプ状部４の接液面５に衝突せ
しめられる場合における、各塗料の接液面５にお
ける衝突地点間の距離Ｌと被塗装体の塗料状態と
の関係を、第３図に示されるグラフを参照して述
べる。 Next, as described above, when two types of paints collide with the liquid contact surface 5 of the cup-shaped part 4 in the rotary atomizing head 2, the distance L between the collision points on the liquid contact surface 5 of each paint is calculated. The relationship with the paint condition of the object to be painted will be described with reference to the graph shown in FIG.
第３図のグラフは、横軸に距離Ｌがとられ、ま
た、縦軸にHunterの色差式に基づいて色差計を
用いて算出された、被塗装体の塗装面との２種の
塗装が充分に混合されて得られる混合塗料が極め
て均質に塗布された標準塗装板との色差ΔEがと
られており、距離Ｌを設定して色差ΔEを求める
実験を、距離Ｌを異ならせて繰り返した結果を示
すものである。この実験結果から、２種の塗料の
接液面５における衝突地点が相互に離隔する程、
被塗装体の塗装面と標準塗装板との色差ΔEが大
となつて、被塗装体の塗装状態が不均質なものと
なり、２種の塗料の接液面５における衝突地点が
略同一である場合には、色差ΔEが極めて小とな
つて、被塗装体の塗装面が、均質な塗装が施され
た良好なものとなることが明瞭に理解される。 In the graph in Figure 3, the horizontal axis is the distance L, and the vertical axis is the two types of coatings calculated using a color difference meter based on Hunter's color difference formula. The color difference ΔE from a standard coated board on which the mixed paint obtained by thoroughly mixing was applied extremely uniformly was measured, and the experiment to determine the color difference ΔE by setting the distance L was repeated by changing the distance L. This shows the results. From this experimental result, it was found that the farther apart the collision points of the two types of paint on the wetted surface 5 are, the more
The color difference ΔE between the painted surface of the object to be painted and the standard painted plate becomes large, and the coating condition of the object to be painted becomes non-uniform, and the collision points of the two types of paint on the wetted surface 5 are almost the same. It is clearly understood that in this case, the color difference ΔE becomes extremely small and the coated surface of the object to be coated becomes a good one with a uniform coating.
これよりして、２種の塗料が合流せしめられ
て、回転霧化ヘツド２におけるカツプ状部４の接
液面５の略同一位置に衝突することになる。本発
明に係る回転霧化静電塗装装置の例による静電塗
装が行われる場合には、被塗装体の塗装面を極め
て優れたものとすることが分かる。 As a result, the two types of paint are merged and collide with each other at approximately the same position on the liquid contact surface 5 of the cup-shaped portion 4 of the rotary atomizing head 2. It can be seen that when electrostatic coating is performed using the example of the rotary atomization electrostatic coating apparatus according to the present invention, the coated surface of the object to be coated is extremely excellent.
第４図は、本発明に係る回転霧化静電塗装装置
の他の例における要部を示す。この例において
は、塗料供給ノズル部１６が、塗料供給ノズル５
０ａ及び５０ｂと硬化剤供給ノズル５０ｃとで構
成されており、塗料供給ノズル５０ａ及び５０ｂ
及び硬化剤供給ノズル５０ｃは、夫々、塗料供給
用パイプ２０ａ及び２０ｂ及び硬化剤供給用パイ
プ２０ｃの各々の一端に連結されている。そし
て、これら塗料供給ノズル５０ａ及び５０ｂと硬
化剤供給ノズル５０ｃとは、回転霧化ヘツド２に
おけるカツプ状部４の接液面５の近傍において、
塗料供給ノズル部１６の開口部１７を形成する
夫々の開口端５１ａ，５１ｂ及び５１ｃが、相互
間に所定の離隔距離をもつて、回転霧化ヘツド２
の回転軸線の周囲を巡る円周に沿う方向に配され
ている。この場合にも、塗料供給ノズル５０ａ及
び５０ｂ及び硬化剤供給ノズル５０ｃの夫々の開
口端５１ａ，５１ｂ及び５１ｃから噴出される塗
料主剤及び硬化剤、あるいは、複数種の塗料は、
空中で相互に合流して接液面５に衝突するものと
される。 FIG. 4 shows the main parts of another example of the rotary atomization electrostatic coating apparatus according to the present invention. In this example, the paint supply nozzle section 16 is connected to the paint supply nozzle 5.
0a and 50b and a hardening agent supply nozzle 50c, the paint supply nozzle 50a and 50b
The curing agent supply nozzle 50c is connected to one end of each of the paint supply pipes 20a and 20b and the curing agent supply pipe 20c, respectively. These paint supply nozzles 50a and 50b and curing agent supply nozzle 50c are located near the liquid contact surface 5 of the cup-shaped portion 4 of the rotary atomization head 2.
The respective opening ends 51a, 51b, and 51c forming the opening 17 of the paint supply nozzle section 16 are spaced apart from each other by a predetermined distance, and are connected to the rotary atomizing head 2.
It is arranged in a direction along the circumference around the axis of rotation. In this case as well, the paint base and curing agent, or the plurality of types of paints, are sprayed from the open ends 51a, 51b, and 51c of the paint supply nozzles 50a and 50b and the curing agent supply nozzle 50c, respectively.
It is assumed that they merge together in the air and collide with the liquid contact surface 5.
なお、上述の例においては、塗料供給ノズル部
１６が、塗料供給ノズルに加えて硬化剤供給ノズ
ルを含むものとされているが、斯かる塗料供給ノ
ズル部１６に代えて、複数の塗料供給ノズルのみ
で形成される塗料供給ノズル部を用いることもで
きる。 In the above example, the paint supply nozzle section 16 includes a curing agent supply nozzle in addition to the paint supply nozzle, but instead of the paint supply nozzle section 16, a plurality of paint supply nozzles may be used. It is also possible to use a paint supply nozzle section formed by a chisel.
（発明の効果）
以上の説明から明らかな如く、本発明に係る回
転霧化静電塗装装置及びそれを使用した静電塗装
方法によれば、静電塗装用回転霧化ヘツドに対し
て塗料主剤と硬化剤とを、あるいは、複数種の塗
料を個別に設けられた複数の供給ノズルを通じて
供給して、それらを回転霧化ヘツドから飛散させ
るにあたり、複数の供給ノズルからの塗料主剤及
び硬化剤もしくは複数種の塗料の適正な供給を確
保でき、あるいは、複数の供給ノズルの夫々にお
ける開口端の「汚れ」を低減できるようにされた
設定のもとで、複数種の塗料を空間で合流させ、
合流した状態で回転霧化ヘツドの接液面における
共通の位置に衝突させることにより、回転霧化ヘ
ツドにより塗料主剤と硬化剤とが、もしくは、複
数種の塗料が適正に混合されて霧化放散される状
態が得られ、それにより、被塗装体に対する塗料
の塗布が一様に行われて、被塗装体の塗装面が光
沢、硬度及び耐候性等における斑のない優れたも
のとなるようにすることができる。(Effects of the Invention) As is clear from the above explanation, according to the rotary atomizing electrostatic coating device and the electrostatic coating method using the same according to the present invention, the paint base material can be applied to the rotary atomizing head for electrostatic coating. When supplying a plurality of types of paint through a plurality of individually provided supply nozzles and scattering them from a rotary atomizing head, Multiple types of paints are merged in a space under settings that can ensure proper supply of multiple types of paints or reduce "contamination" at the opening end of each of multiple supply nozzles,
By colliding with a common position on the wetted surface of the rotating atomizing head in a merging state, the main paint agent and curing agent, or multiple types of paints, are properly mixed and atomized and dispersed by the rotating atomizing head. As a result, the paint is uniformly applied to the object to be painted, and the painted surface of the object to be painted has excellent gloss, hardness, weather resistance, etc. can do.
第１図Ａ及びＢは本発明に係る回転霧化静電塗
装装置の一例における要部を示す一部破断面を含
む斜視図及び断面図、第２図は本発明に係る回転
霧化静電塗装装置の一例を示す概略構成図、第３
図は第１図及び第２図に示される例が使用されて
塗装がなされた被塗装体の塗装状態の説明に供さ
れるグラフ、第４図は本発明に係る回転霧化静電
塗装装置の他の例の要部を示す一部破断面を含む
斜視図である。
図中、２は回転霧化ヘツド、４はカツプ状部、
５は接液面、１１はエアモータ、１６は塗料供給
ノズル部、１６ａ，１６ｂ，５０ａ及び５０ｂは
塗料供給ノズル、１６ｃ及び５０ｃは硬化剤供給
ノズル、１７は開口部、１７ａ，１７ｂ，１７
ｃ，５１ａ，５１ｂ及び５１ｃは開口端、２０ａ
及び２０ｂは塗料供給用パイプ、２０ｃは硬化剤
供給用パイプ、３２及び３３は塗料槽、３４は硬
化剤槽である。
FIGS. 1A and 1B are a perspective view and a cross-sectional view, including a partially broken surface, showing essential parts of an example of a rotary atomizing electrostatic coating apparatus according to the present invention, and FIG. 2 is a rotary atomizing electrostatic coating apparatus according to the present invention. Schematic configuration diagram showing an example of a coating device, Part 3
The figure is a graph used to explain the coating state of an object to be coated using the examples shown in Figures 1 and 2, and Figure 4 is a rotary atomizing electrostatic coating device according to the present invention. It is a perspective view including a partially broken surface showing the main part of another example. In the figure, 2 is a rotating atomizing head, 4 is a cup-shaped part,
5 is a liquid contact surface, 11 is an air motor, 16 is a paint supply nozzle section, 16a, 16b, 50a and 50b are paint supply nozzles, 16c and 50c are curing agent supply nozzles, 17 is an opening, 17a, 17b, 17
c, 51a, 51b and 51c are open ends, 20a
20b is a paint supply pipe, 20c is a curing agent supply pipe, 32 and 33 are paint tanks, and 34 is a curing agent tank.
Claims (1)
面状の接液面を備える回転霧化ヘツドと、該回転
霧化ヘツドを上記接液面により包囲される回転軸
線をもつて回転するものとすべく駆動する回転駆
動手段と、上記回転霧化ヘツド内に臨むものとさ
れた開口端を有して設けられ、上記回転霧化ヘツ
ドにおける接液面に塗料を供給する複数の供給ノ
ズルとを備え、 上記複数の供給ノズルが、夫々が有する開口端
を上記回転霧化ヘツドの接液面の近傍において該
接液面に対向させる状態をもつて配され、該複数
の供給ノズルの夫々の開口端が、相互間に所定の
間隔をおく位置をとるとともに、各々から噴出す
る塗料もしくは塗料を構成する液剤を上記接液面
に到達する以前に空間において合流させるべく所
定の方向に指向せしめられたことを特徴とする回
転霧化静電塗装装置。 ２ 開放端を有したカツプ内面状の接液面を備え
る回転霧化ヘツドを上記接液面により包囲される
回転軸線をもつて回転させ、上記回転霧化ヘツド
内に臨むものとされた開口端を有して設けられた
複数の供給ノズルを通じて、回転する上記回転霧
化ヘツドにおける接液面に塗料を供給し、上記回
転霧化ヘツドの接液面の近傍において該接液面に
対向せしめられ、相互間に所定の間隔をおく位置
をとるとともに所定の方向に指向せしめられた上
記複数の供給ノズルの夫々の開口端から噴出する
塗料もしくは塗料を構成する液剤を、上記接液面
に到達する以前に空間において合流させ、合流さ
せた状態をもつて回転する上記接液面における共
通の位置に衝突させて、該接液面の開放端から霧
化放散させることにより被塗装体に付着させるこ
とを特徴とする静電塗装方法。[Scope of Claims] 1. A rotary atomizing head having a wetted surface in the form of an inner surface of a cup having an open end for atomizing and dispersing paint, and a rotating axis surrounding the rotary atomizing head by the wetted surface. and a rotary drive means for driving the rotary atomizing head to rotate, and an open end facing into the rotary atomizing head, and supplying paint to the liquid contact surface of the rotary atomizing head. a plurality of supply nozzles, each of the plurality of supply nozzles is arranged with an open end thereof facing the liquid contact surface in the vicinity of the liquid contact surface of the rotary atomizing head; The respective opening ends of the supply nozzles are positioned at a predetermined distance from each other, and are arranged at a predetermined distance so that the paint or the liquid forming the paint spouted from each nozzle merges in a space before reaching the liquid contact surface. A rotary atomizing electrostatic coating device characterized by being oriented in a direction. 2. A rotary atomizing head having a liquid contact surface shaped like the inner surface of a cup having an open end is rotated about a rotation axis surrounded by the liquid contact surface, and an open end facing into the rotary atomization head. The paint is supplied to the liquid-contacting surface of the rotating rotary atomizing head through a plurality of supply nozzles provided with , the paint or the liquid forming the paint jetted from the open end of each of the plurality of supply nozzles, which are positioned at a predetermined distance from each other and directed in a predetermined direction, reaches the liquid contact surface. They have been previously merged in a space, and the merged state is caused to collide with a common position on the rotating liquid-contacted surface, and is atomized and dispersed from the open end of the liquid-contacted surface, thereby adhering to the object to be coated. An electrostatic painting method characterized by:
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6009386A JPS62216663A (en) | 1986-03-18 | 1986-03-18 | Rotating atomization electrostatic coating device |
| US07/026,487 US4785995A (en) | 1986-03-18 | 1987-03-16 | Methods and apparatus for conducting electrostatic spray coating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6009386A JPS62216663A (en) | 1986-03-18 | 1986-03-18 | Rotating atomization electrostatic coating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62216663A JPS62216663A (en) | 1987-09-24 |
| JPH0474061B2 true JPH0474061B2 (en) | 1992-11-25 |
Family
ID=13132126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6009386A Granted JPS62216663A (en) | 1986-03-18 | 1986-03-18 | Rotating atomization electrostatic coating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62216663A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4520601B2 (en) * | 2000-08-29 | 2010-08-11 | 本田技研工業株式会社 | Two-component mixed coating equipment |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59230652A (en) * | 1983-06-14 | 1984-12-25 | Nippon Ranzubaagu Kk | Rotary spray apparatus |
-
1986
- 1986-03-18 JP JP6009386A patent/JPS62216663A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59230652A (en) * | 1983-06-14 | 1984-12-25 | Nippon Ranzubaagu Kk | Rotary spray apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62216663A (en) | 1987-09-24 |
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