JPH0439389B2 - - Google Patents
Info
- Publication number
- JPH0439389B2 JPH0439389B2 JP61060090A JP6009086A JPH0439389B2 JP H0439389 B2 JPH0439389 B2 JP H0439389B2 JP 61060090 A JP61060090 A JP 61060090A JP 6009086 A JP6009086 A JP 6009086A JP H0439389 B2 JPH0439389 B2 JP H0439389B2
- Authority
- JP
- Japan
- Prior art keywords
- paint
- contact surface
- curing agent
- liquid contact
- atomizing head
- 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 259
- 239000003795 chemical substances by application Substances 0.000 claims description 146
- 239000007788 liquid Substances 0.000 claims description 100
- 238000000889 atomisation Methods 0.000 claims description 26
- 238000009503 electrostatic coating Methods 0.000 claims description 25
- 238000007610 electrostatic coating method Methods 0.000 claims description 16
- 238000000576 coating method Methods 0.000 claims description 11
- 239000002075 main ingredient Substances 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 22
- 239000000463 material Substances 0.000 description 17
- 238000004140 cleaning Methods 0.000 description 15
- 239000004925 Acrylic resin Substances 0.000 description 13
- 229920000178 Acrylic resin Polymers 0.000 description 13
- 239000011248 coating agent Substances 0.000 description 10
- 239000012948 isocyanate Substances 0.000 description 7
- 150000002513 isocyanates Chemical class 0.000 description 7
- 238000002156 mixing Methods 0.000 description 6
- 239000001054 red pigment Substances 0.000 description 6
- 239000012463 white pigment Substances 0.000 description 6
- 239000010419 fine particle Substances 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 239000012459 cleaning agent Substances 0.000 description 4
- 239000002335 surface treatment layer Substances 0.000 description 4
- 230000005484 gravity Effects 0.000 description 3
- 238000010422 painting Methods 0.000 description 3
- 239000004848 polyfunctional curative Substances 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 229920000877 Melamine resin Polymers 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 2
- 229920000180 alkyd Polymers 0.000 description 2
- 230000015572 biosynthetic process 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
- 229910052750 molybdenum Inorganic materials 0.000 description 2
- 239000011733 molybdenum Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000007591 painting process Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 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
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004033 plastic Substances 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
- 238000005507 spraying Methods 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 atomization electrostatic coating method for adhesion to surfaces.
（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
電塗装法が採用されている。静電塗装法は、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
るものである。このような静電塗装法の採用によ
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 method is used when applying paint to the surface of an automobile body uniformly over the entire surface. In the electrostatic coating method, a DC high voltage is applied between the object to be coated 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. , which uses electrostatic adsorption to adhere to the object to be coated. By employing such an electrostatic coating method, 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.
斯かる静電塗装法による塗装が行われる際、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、アクリル樹脂系の塗料
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 painting by such an electrostatic coating method, if the object to be painted 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 plastic, 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, and has good adhesion to the object.
The painted surface has excellent gloss, hardness and weather resistance.
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
電塗装法による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
なつてしまうという問題がある。 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 painting is performed by electrostatic coating using such two-component paint, a mixer is usually provided to mix the paint base and curing agent. After being mixed by a mixer, the two-component paint is supplied to a sprayer, and the two-component paint is atomized and dispersed by the sprayer.
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 spent 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
硬化剤の過不足を生じ、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 may be an excess or deficiency of the curing agent, resulting in the inconvenience that the gloss, hardness, weather resistance, etc. of the painted surface will be uneven.
斯かる点に鑑み、本発明は、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供給して、それらが回
転霧化ヘツドから飛散せしめられるものとなすに
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できる回転霧
化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 provides a system in which a paint base material and a curing agent, or multiple types of paints are individually supplied to a rotary atomizing head for electrostatic coating, and the paints are dispersed from the rotary atomizing head. In order to achieve this, a state is obtained in which the main paint agent and curing agent, or multiple types of paints, are properly mixed and atomized and dispersed using the rotating atomizing head, thereby allowing the paint to be applied to the object to be painted. The purpose of the present invention is to provide a rotary atomization electrostatic coating method that enables uniform application of the coating and provides an excellent coating surface with no unevenness in gloss, hardness, weather resistance, etc. do.
（問題点を解決するための手段）
上述の目的を達成すべく、本発明に係る第１の
回転霧化静電塗装方法は、塗料主剤及び硬化剤か
ら成る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静電塗装用回転霧化ヘツ
ドを、その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とともに、接
液面に塗料主剤と硬化剤とを夫々個別の供給通路
を通じて同時に供給して、接液面に供給された塗
料主剤及び硬化剤が、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つて移動するようになすもの
とされる。(Means for Solving the Problems) In order to achieve the above-mentioned object, the first rotary atomization electrostatic coating method according to the present invention includes an open end for atomizing and dispersing a paint consisting of a paint base agent and a curing agent. A rotary atomizing head for electrostatic coating, which has a liquid contact surface shaped like the inner surface of a cup, is driven to rotate with a rotational axis surrounded by the liquid contact surface, and a paint main agent is applied to the liquid contact surface. and curing agent are simultaneously supplied through separate supply passages, so that the paint main agent and curing agent supplied to the liquid contact surface form respective layers that overlap in a direction perpendicular to the rotational axis of the rotary atomizing head. ,
It is designed to move toward the open end of the liquid contact surface.
また、本発明に係る第２の回転霧化静電塗装方
法は、複数種の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静電塗装用回転
霧化ヘツドを、その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とと
もに、接液面に複数種の塗料の夫々を個別の供給
通路を通じて同時に供給して、接液面に供給され
た上記複数種の塗料が、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つて移動するようになす
ものとされる。 Further, a second rotary atomization electrostatic coating method according to the present invention includes a rotary atomization head for electrostatic coating, which has a liquid contact surface shaped like an inner surface of a cup and has an open end for atomizing and dispersing a plurality of types of paint. , is driven to rotate with a rotational axis surrounded by the liquid-contacted surface, and simultaneously supplies each of a plurality of types of paint to the liquid-contacted surface through separate supply passages to supply it to the liquid-contacted surface. The above-mentioned plurality of types of paints 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.
（作用）
上述の如くの本発明に係る回転霧化静電塗装方
法によれば、回転駆動される回転霧化ヘツドの接
液面に対して、塗料主剤と硬化剤、あるいは、複
数種の塗料の夫々が、例えば、複数の供給ノズル
の夫々により形成される個別の供給通路を通じ
て、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
開放端に向つて移動するものとなるように、同時
に供給される。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) According to the rotary atomization electrostatic coating method according to the present invention as described above, a paint main ingredient and a curing agent, or a plurality of types of paints are applied to the liquid contact surface of the rotary atomization head that is rotationally driven. For example, through individual supply passages formed by each of a plurality of supply nozzles, each of the atomizing heads can be applied to the liquid contacting surface while forming respective layers that overlap in a direction perpendicular to the rotational axis of the rotating atomization head on the liquid contacting surface. are fed at the same time so that they move toward the open end of the 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 fine particle of the atomized paint forms a double layer or multiple layers, and as a result, the rotary atomization head properly mixes the paint base and curing agent, or multiple types of paint. A state is obtained in which the paint is atomized and dispersed, and the paint is uniformly applied 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１図は、本発明に係る回転霧化静電塗装方法
の実施に使用される静電塗装装置の一例を概略的
に示す。 FIG. 1 schematically shows an example of an electrostatic coating device used to carry out the rotary atomization electrostatic coating method according to the present invention.
第１図に示される静電塗装装置においては、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４ｂ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４ｂ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１
１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 electrostatic coating apparatus shown in FIG. 1, a rotary atomizing head 2 is comprised of a cup-shaped portion 4 and a hub 6 provided at the center of the cup-shaped portion 4. The cup-shaped portion 4 has a large-diameter open end 4a and a small-diameter open end 4b, and the cup-shaped inner circumferential surface between them serves as a 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. Cup-shaped part 4 and hub 6
A large number of through holes 8 are formed at the connection portion with the . In addition, an air motor 11 for rotationally driving the rotary atomizing head 2 is connected to a cup-shaped part 4 at the end of the hub 6 on the small-diameter opening end 4b side. A rotating shaft 12 extending within the 4 is connected. This air motor 1
1, the rotary atomizing head 2 has a cup-shaped part 4
It is surrounded by the liquid contact surface 5 of the rotor, and is rotated at high speed with a rotation axis passing through the center of the hub 6 and 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 amounts of the paint base material flowing through the pipe 20b 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浄液槽
３８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. It is designed to be inserted into a cleaning liquid tank 38.
第２図は、上述の塗料供給ノズル部１６及びそ
の周囲を拡大して示す。この第２図に示される塗
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１６ｃ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２０
ｃ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１７ｃが、回転霧化ヘツド
２の回転軸線に直交する方向、即ち、カツプ状部
４の半径方向に積み重ねられるように配されてい
る。 FIG. 2 shows an enlarged view of the paint supply nozzle section 16 and its surroundings. In a specific example of the paint supply nozzle section 16 shown in FIG. 16b and curing agent supply nozzle 16c are respectively connected to paint supply pipes 20a and 20b and curing agent supply pipe 20.
c is connected to one end of each. The paint supply nozzles 16a and 16b and the curing agent supply nozzle 16c form an 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 open ends 17a, 17b and 17c of the rotary atomizing head 2 are stacked in a direction perpendicular to the rotation axis of the rotary atomizing head 2, that is, in a radial direction of the cup-shaped portion 4.
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.
上述の如くに構成された静電塗装装置を使用し
て、本発明に係る回転霧化静電塗装方法の一例に
基づいての被塗装体に対する塗装を行うにあたつ
ては、先ず、エアモータ１１を作動させ、回転霧
化ヘツド２を、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の中央部を
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なす。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 coating an object to be coated based on an example of the rotary atomization electrostatic coating method according to the present invention using the electrostatic coating apparatus configured as described above, first, the air motor 11 is The rotary atomizing head 2 is surrounded by the liquid contact surface 5 of the cup-shaped portion 4 described above and has a rotational axis passing through the center of the hub 6 and the rotating shaft 12, for example, from 20,000 to 20,000.
It is in a state where it rotates at a rotation speed of 30000 rpm. At this time, a DC high voltage is applied to the rotary atomizing head 2 so that it has a potential of, for example, -90 kV with respect to the object to be coated.
斯かる状態において、例えば、ポンプ２７及び
２８を作動させ、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を、
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１６
ｃに導く。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
よる調量を行う。 In such a state, for example, the pumps 27 and 28 are operated to remove the acrylic resin paint base containing white pigment stored in the paint tank 33 and the isocyanate curing agent stored in the curing agent tank 34.
The paint supply nozzle 16b and the hardening agent supply nozzle 16 in the paint supply nozzle section 16 are connected through the paint supply pipe 20b and the hardening agent supply pipe 20c.
lead to c. At this time, the flow rate regulators 23 and 24 are used to measure the amount so that the weight ratio of the paint base agent to the curing agent is 3:1.
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を、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から同時に噴出させ、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に対して供給する。このとき、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は、第２図に示され
る如く、カツプ状部４の接液面５の近傍におい
て、回転霧化ヘツド２の回転軸線に直交する方
向、即ち、カツプ状部４の半径方向に重ねられて
配されているので、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１７ｃから噴出する硬化剤と
を、回動する接液面５上の略同一位置に衝突させ
ることになる。 Then, 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 opening end 17b of the paint supply nozzle 16b and the opening end 17c of the curing agent supply nozzle 16c are connected to the rotary atomizing head 2 in the vicinity of the liquid contact surface 5 of the cup-shaped portion 4, as shown in FIG. Since they are arranged so as to overlap in the direction perpendicular to the rotational axis, that is, in the radial direction of the cup-shaped portion 4, the paint main agent ejected from the open end 17b of the paint supply nozzle 16b and the open end 17c of the curing agent supply nozzle 16c. The curing agent ejected from the liquid contact surface 5 is caused to collide with substantially the same position on the rotating liquid contact surface 5.
このようにして、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１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。 In this way, the paint base and curing agent collide 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. 1, 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を施し
た後、他の被塗装体に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
剤の色替えを行うにあたつては、ポンプ２７及び
２８の作動を停止させて、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を停止す
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を作動させる。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を、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１８に導く。そして、洗浄
液供給ノズル１８に導かれた洗浄液を、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
給して、回転霧化ヘツド２内の洗浄を行う。 After painting the object to be painted using an acrylic resin paint base containing a white pigment in this way, another object to be painted is coated with an acrylic resin paint base containing a red pigment. When changing the color of the paint base, the operation of the pumps 27 and 28 is stopped to stop the supply of the paint base and curing agent from the paint tank 33 and the curing agent tank 34, and the cleaning liquid supply The pump 37 provided in the pipe 35 is activated. Thereby, the cleaning liquid such as thinner stored in the cleaning liquid tank 38 is guided to the cleaning liquid supply nozzle 18 through the cleaning liquid supply pipe 35 and the flow rate regulator 36 . 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. Clean the area.
その後、ポンプ３７の作動を停止させるととも
にポンプ２６及び２８を作動させ、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
を、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２４によ
る調量を行つて、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１６
ｃに導き、さらに、塗料供給ノズル１６ａ及び硬
化剤供給ノズル１６ｃに夫々導かれた塗料主剤及
び硬化剤を、塗料供給ノズル１６ａの開口端１７
ａ及び硬化剤供給ノズル１６ｃの開口端１７ｃか
ら同時に噴出させ、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
給する。このときにも、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は、第２図に示される如く、カツプ状部
４の接液面５の近傍において、回転霧化ヘツド２
の回転軸線に直交する方向、即ち、カツプ状部４
の半径方向に重ねられて配されているので、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１７
ｃから噴出する硬化剤とを、回動する接液面５上
の略同一位置に衝突させることになる。 Thereafter, the operation of the pump 37 is stopped, and the pumps 26 and 28 are activated, and the acrylic resin paint base material containing the red pigment and the isocyanate hardener stored in the paint tank 32 and hardener tank 34 are transferred to the paint supply pipe. 20a and the hardening agent supply pipe 20c, the flow rate regulators 22 and 24 measure the amount, and the paint supply nozzle 16a and the hardening agent supply nozzle 16 in the paint supply nozzle section 16 are supplied.
c, and further led to the paint supply nozzle 16a and the curing agent supply nozzle 16c, respectively, to the opening end 17 of the paint supply nozzle 16a.
a and the opening end 17c of the curing agent supply nozzle 16c, and are supplied to the liquid contact surface 5 of the cup-shaped portion 4 of the rotary atomizing head 2 rotating at high speed. Also at this time, the opening end 17a of the paint supply nozzle 16a and the opening end 17c of the curing agent supply nozzle 16c are connected to the rotary atomizing head in the vicinity of the liquid contact surface 5 of the cup-shaped portion 4, as shown in FIG. 2
in the direction perpendicular to the axis of rotation of the cup-shaped portion 4
Since they are arranged to overlap in the radial direction, the paint main agent ejected from the open end 17a of the paint supply nozzle 16a and the open end 17 of the curing agent supply nozzle 16c.
The curing agent ejected from c is caused to collide with substantially the same position on the rotating liquid contact surface 5.
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１図に示される静電塗装装置におい
て、ポンプ２６，２７及び２８を同時に作動さ
せ、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を、塗料供給
用パイプ２０ａ及び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１６ａ及び１６ｂ、及び、
硬化剤供給ノズル１６ｃに夫々導き、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
剤を、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１６
ｃの開口端１７ｃから同時に噴出させ、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に対して供給するようにしてもよい。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を、回動する接液面５上の
略同一位置に衝突させることになる。 In the electrostatic coating apparatus shown in FIG. 1, the pumps 26, 27, and 28 are operated simultaneously, and the acrylic resin paint base containing the red pigment and the acrylic resin containing the white pigment stored in the paint tanks 32 and 33 are removed. The base paint material and the isocyanate curing agent stored in the curing agent tank 34 are supplied to the paint supply nozzles 16a and 16b in the paint supply nozzle section 16 through the paint supply pipes 20a and 20b and the hardening agent supply pipe 20c. ,as well as,
The paint base material and hardening agent guided to the hardening agent supply nozzle 16c, respectively, and further led to the paint supply nozzles 16a and 16b and the hardening agent supply nozzle 16c, respectively, are transferred to the open ends 17a and 17b of the paint supply nozzles 16a and 16b, And curing agent supply nozzle 16
They may be simultaneously ejected from the open end 17c of the cup-shaped portion 4 of the rotary atomizing head 2 rotating at high speed and supplied to the liquid-contacting surface 5 of the cup-shaped portion 4. In such a case, the paint supply nozzles 16a and 16b
and the opening end 17c of the curing agent supply nozzle 16c.
The curing agent ejected from the liquid contact surface 5 is caused to collide with substantially the same position on 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１図に示され
る静電塗装装置における塗料槽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なし、本発明
に係る回転霧化静電塗装方法を適用して、被塗装
体に対するこれら２種の塗料の混合塗装を行うこ
ともできる。 Furthermore, unlike the above-mentioned example, the paint tanks 32 and 33 in the electrostatic coating apparatus shown in FIG.
For example, red paint and white paint such as melamine alkyd paint are stored separately, and the rotary atomization electrostatic coating method according to the present invention is applied to paint a mixed coating of these two types of paint on the object to be coated. You can also do
斯かる場合には、ポンプ２６及び２７を作動さ
せ、塗料槽３２及び３３に貯留された赤色塗料及
び白色塗料を、塗料供給用パイプ２０ａ及び２０
ｂを通じ、流量調整器２２及び２３による調量を
行つて、塗料供給ノズル部１６における塗料供給
ノズル１６ａ及び１６ｂに夫々導き、さらに、塗
料供給ノズル１６ａ及び１６ｂに導かれた塗料の
夫々を、塗料供給ノズル１６ａ及び１６ｂの開口
端１７ａ及び１７ｂから同時に噴出させ、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に対して供給する。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を、回動する接
液面５上の略同一位置に衝突させることになる。 In such a case, the pumps 26 and 27 are operated to transfer the red paint and white paint stored in the paint tanks 32 and 33 to the paint supply pipes 20a and 20.
b, the amount of paint is metered by flow regulators 22 and 23, and the paint is guided to the paint supply nozzles 16a and 16b, respectively, in the paint supply nozzle section 16, and the paint guided to the paint supply nozzles 16a and 16b, respectively, is The cup-shaped part 4 in the rotary atomizing head 2 that simultaneously jets from the open ends 17a and 17b of the supply nozzles 16a and 16b and rotates at high speed.
The liquid is supplied to the liquid contact surface 5. In such a case,
Open ends 17a of paint supply nozzles 16a and 16b
The paint ejected from the and 17b, respectively, collides with substantially the same position on the rotating liquid contact surface 5.
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と被塗装体の塗装状態と
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 coating state of the object to be coated 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の色差式に基づいた色差計
を用いて算出された、被塗装体の塗装面と２種の
塗料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 shows the distance L, and the vertical axis shows the distance between the painted surface of the object to be painted and the two types of paint, 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種の塗料を回転霧化ヘツド２
におけるカツプ状部４の接液面５の略同一位置に
衝突させるとになる、本発明に係る回転霧化静電
塗装方法に従つての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
ことができることになる。 From this, the two types of paint are transferred to the rotary atomizing head 2.
When electrostatic coating is performed according to the rotary atomization electrostatic coating method of the present invention, in which the liquid contact surface 5 of the cup-shaped portion 4 is collided with the liquid at approximately the same position, the surface of the object to be coated is This means that the painted surface can be of extremely high quality.
上述の第１図に示される静電塗装装置における
塗料供給ノズル部１６は、第２図に示されるもの
の他に、例えば、第４図及び第５図に示される如
くの具体構成を有するものとされてもよい。 The paint supply nozzle section 16 in the electrostatic coating apparatus shown in FIG. 1 described above may have a specific configuration as shown in FIGS. may be done.
第４図に示される塗料供給ノズル部１６の具体
構成例においては、塗料供給ノズル部１６が、塗
料供給ノズル５０ａ及び５０ｂと硬化剤供給ノズ
ル５０ｃとで形成され、塗料供給ノズル部１６の
開口部１７を形成することになる。これら塗料供
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
は、回転霧化ヘツド２におけるカツプ状部４の接
液面５に近接した位置にあつて、偏平な形状を有
するものとされて、回転霧化ヘツド２の回転軸線
に直交する方向、即ち、カツプ状部４の半径方向
に積み重ねられるように配されている。斯かる例
のもとでは、接液面５上における塗料主剤及び硬
化剤の夫々の層形成、もしくは、２種の塗料の
夫々の層形成がより一層促進される。 In the specific configuration example of the paint supply nozzle section 16 shown in FIG. 17 will be formed. Open ends 51a, 51b and 51c of these paint supply nozzles 50a and 50b and curing agent supply nozzle 50c, respectively.
is located close to the liquid contact surface 5 of the cup-shaped part 4 in the rotary atomizing head 2, has a flat shape, and is directed in a direction perpendicular to the rotational axis of the rotary atomizing head 2, that is, They are arranged so as to be stacked in the radial direction of the cup-shaped portion 4. In such an example, the formation of each layer of the paint main agent and curing agent, or the formation of each layer of two types of paints on the liquid contact surface 5 is further promoted.
また、第５図に示される塗料供給ノズル部１６
の具体構成例においては、塗料供給ノズル部１６
が、塗料供給ノズル５２ａ及び５２ｂと硬化剤供
給ノズル５２ｃとで形成され、硬化剤供給ノズル
５２ｃの先端部が透孔４０を介して塗料供給ノズ
ル５２ｂ内に挿入され、さらに、塗料供給ノズル
５２ｂの先端部が透孔４２を介して塗料供給ノズ
ル５２ａ内に挿入されている。そして、塗料供給
ノズル５２ａ及び５２ｂ及び硬化剤供給ノズル５
２ｃの夫々の先端部が多重層を形成するものとさ
れた、塗料供給ノズル部１６の開口部１７を形成
することになる、塗料供給ノズル５２ａ及び５２
ｂ及び硬化剤供給ノズル５２ｃの夫々の開口端５
３ａ，５３ｂ及び５３ｃが、回転霧化ヘツド２に
おけるカツプ状部４の接液面５に近接した位置に
おいて、回転霧化ヘツド２の回転軸線に直交する
方向に積み重ねられたことになる部分を有するも
のとされている。 Furthermore, the paint supply nozzle section 16 shown in FIG.
In the specific configuration example, the paint supply nozzle section 16
is formed of paint supply nozzles 52a and 52b and a curing agent supply nozzle 52c, the tip of the curing agent supply nozzle 52c is inserted into the paint supply nozzle 52b through the through hole 40, and The tip end is inserted into the paint supply nozzle 52a through the through hole 42. Then, the paint supply nozzles 52a and 52b and the curing agent supply nozzle 5
Paint supply nozzles 52a and 52, each of which has its tip end forming the opening 17 of the paint supply nozzle section 16, is configured to form multiple layers.
b and each open end 5 of the curing agent supply nozzle 52c.
3a, 53b and 53c have a portion that is stacked in a direction perpendicular to the rotational axis of the rotary atomizing head 2 at a position close to the liquid contact surface 5 of the cup-shaped portion 4 in the rotary atomizing head 2. It is considered a thing.
ところで、第１図に示される静電塗装装置にお
いて、回転霧化ヘツド２の内部に、カツプ状部４
の小径開口端部４ｂを通じて挿入される塗料供給
ノズル部１６が、第２図，第４図及び第５図に示
される例の如く、回転霧化ヘツド２の回転軸線に
対して略平行に伸びるように配される場合には、
カツプ状部４の接液面５に対する塗料供給ノズル
部１６からの塗料主剤等の供給量が比較的大とさ
れる場合には、塗料供給ノズル部１６から噴出さ
れた塗料主剤等がハブ６に衝突すること等に起因
して、カツプ状部４の接液面５上において塗料主
剤等の脈流が形成される虞がある。斯かる塗料主
剤等の脈流が形成されると、カツプ状部４の接液
面５の開放端から霧化放散される微粒子の夫々に
ついての塗料主剤と硬化剤との含有状態、あるい
は、２種の塗料の混合状態が不均一なものとなつ
てしまうという不都合を生じる虞がある。 By the way, in the electrostatic coating apparatus shown in FIG.
A paint supply nozzle section 16 inserted through the small-diameter opening end 4b of the rotary atomizing head 2 extends substantially parallel to the rotational axis of the rotary atomizing head 2, as in the examples shown in FIGS. 2, 4, and 5. When arranged like this,
When the amount of the paint main agent etc. supplied from the paint supply nozzle section 16 to the liquid contact surface 5 of the cup-shaped part 4 is relatively large, the paint main agent etc. spouted from the paint supply nozzle section 16 is supplied to the hub 6. There is a possibility that a pulsating flow of the paint base material or the like may be formed on the liquid contact surface 5 of the cup-shaped portion 4 due to the collision or the like. When such a pulsating flow of the paint base agent, etc. is formed, the content state of the paint base agent and curing agent in each of the fine particles atomized and dispersed from the open end of the liquid contact surface 5 of the cup-shaped portion 4, or 2 There is a risk that the mixed state of the seed paint may become non-uniform.
斯かる不都合の回避が意図される場合には、塗
料供給ノズル部１６は、例えば、第６図Ａ及びＢ
に示される如くの具体構成を有するものとされ
る。 If it is intended to avoid such inconvenience, the paint supply nozzle section 16 may be configured as shown in FIGS. 6A and 6B, for example.
It has a specific configuration as shown in .
この具体構成例においては、塗料供給ノズル部
１６が塗料供給ノズル５４ａ及び５４ｂと硬化剤
供給ノズル５４ｃとで形成され、塗料供給ノズル
部１６の開口部１７を形成することになる、これ
ら塗料供給ノズル５４ａ及び５４ｂ及び硬化剤供
給ノズル５４ｃの夫々の開口端５５ａ，５５ｂ及
び５５ｃは、カツプ状部４の接液面５に対向する
状態で、回転霧化ヘツド２の回転軸心に沿う方向
に隣接配列されるものとなされる。このため、塗
料供給ノズル５４ａ及び５４ｂ及び硬化剤供給ノ
ズル５４ｃの夫々の先端部は、第６図Ｂに示され
る如く、カツプ状部４の接液面５に向けて折曲さ
れている。この場合、塗料供給ノズル５４ａ及び
５４ｂ及び硬化剤供給ノズル５４ｃの夫々の先端
部の折曲の程度は、開口端５５ａ，５５ｂ及び５
５ｃから噴出される塗料主剤等の接液面５に対す
る噴出角度が、60度以上程度とされるのが望まし
い。 In this specific configuration example, the paint supply nozzle section 16 is formed of paint supply nozzles 54a and 54b and a curing agent supply nozzle 54c, and these paint supply nozzles form the opening 17 of the paint supply nozzle section 16. 54a and 54b and the opening ends 55b and 55c of the curing agent supply nozzle 54c are adjacent to each other in the direction along the rotational axis of the rotary atomizing head 2 while facing the liquid contact surface 5 of the cup-shaped portion 4. What is arranged and what is done. For this reason, the tips of the paint supply nozzles 54a and 54b and the curing agent supply nozzle 54c are bent toward the liquid contact surface 5 of the cup-shaped portion 4, as shown in FIG. 6B. In this case, the degree of bending of the tips of the paint supply nozzles 54a and 54b and the curing agent supply nozzle 54c is determined by
It is desirable that the spray angle of the paint base material etc. sprayed from 5c to the liquid contact surface 5 is about 60 degrees or more.
斯かる構成が採られる場合には、塗料供給ノズ
ル５４ａ及び５４ｂ及び硬化剤供給ノズル５４ｃ
から噴出する塗料主剤等の量が比較的大なるもの
とされる場合にも、その塗料主剤等が、直接、カ
ツプ状部４の接液面５に衝突することになり、そ
れがハブ６に衝突すること等に起因してカツプ状
部４の接液面５において脈流を形成する事態が回
避される。 When such a configuration is adopted, the paint supply nozzles 54a and 54b and the curing agent supply nozzle 54c
Even if the amount of the paint main agent, etc. spouted from the hub 6 is relatively large, the paint main agent, etc. will directly collide with the liquid contact surface 5 of the cup-shaped portion 4, which will cause the hub 6 to A situation in which a pulsating flow is formed on the liquid contact surface 5 of the cup-shaped portion 4 due to collision or the like is avoided.
また、第１図に示される静電塗装装置におい
て、塗料供給ノズル部１６が、第２図、第４図、
第５図あるいは第６図Ａ及びＢに示される具体構
成例を採る場合の如く、その開口部１７を形成す
るものとなる塗料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も
のとされる場合には、塗料供給ノズル部１６の開
口部１７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、塗料供給ノズル部１
６からの塗料主剤及び硬化剤の適正な供給が妨げ
られる事態が生じる虞がある。 In addition, in the electrostatic coating apparatus shown in FIG. 1, the paint supply nozzle section 16 is
As in the case of adopting the specific configuration example shown in FIG. 5 or FIGS. 6A and B, the respective opening ends of the paint supply nozzle and the curing agent supply nozzle that form the opening 17 are in a state where they are adjacent to each other. In the case where the paint supply nozzle part 16 is placed in a
There is a possibility that a situation may occur in which the proper supply of the paint base agent and curing agent from No. 6 is hindered.
斯かる事態の回避が意図される場合には、塗料
供給ノズル部１６は、例えば、第７図Ａ及びＢに
示される如くの具体構成を有するものとされる。 If it is intended to avoid such a situation, the paint supply nozzle section 16 may have a specific configuration as shown in FIGS. 7A and 7B, for example.
この具体構成例においては、塗料供給ノズル部
１６が塗料供給ノズル５６ａ及び５６ｂと硬化剤
供給ノズル５６ｃとで形成され、塗料供給ノズル
部１６の開口部１７を形成することになる、これ
ら塗料供給ノズル５６ａ及び５６ｂ及び硬化剤供
給ノズル５６ｃの夫々の開口端５７ａ，５７ｂ及
び５７ｃが、相互間に微小な離隔距離をもつて、
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５６ａ及び５６ｂ及び硬化剤
供給ノズル５６ｃの夫々の先端部が、開口端５７
ａ，５７ｂ及び５７ｃをカツプ状部４の接液面５
に対向せしめるように折曲されている。 In this specific configuration example, the paint supply nozzle section 16 is formed of paint supply nozzles 56a and 56b and a curing agent supply nozzle 56c, and these paint supply nozzles form the opening 17 of the paint supply nozzle section 16. 56a and 56b and the opening ends 57a, 57b, and 57c of the curing agent supply nozzle 56c are spaced apart from each other by a small distance,
They are arranged in an overlapping manner in a direction perpendicular to the rotational axis of the rotary atomizing head 2. Further, in this example, the tips of the paint supply nozzles 56a and 56b and the curing agent supply nozzle 56c are connected to the open end 57.
a, 57b and 57c are the liquid contact surface 5 of the cup-shaped part 4.
It is bent so that it faces the
斯かる構成が採られる場合には、塗料供給ノズ
ル５６ａ及び５６ｂ及び硬化剤供給ノズル５６ｃ
の夫々の開口端５７ａ，５７ｂ及び５７ｃが離隔
配置されているので、塗料主剤と硬化剤が開口端
５７ａ，５７ｂ及び５７ｃの周囲において硬化を
生じる事態が防止される。そして、塗料供給ノズ
ル５６ａの開口端５７ａもしくは塗料供給ノズル
５６ｂの開口端５７ｂ、あるいは、その両者から
噴出する塗料主剤と硬化剤供給ノズル５６ｃの開
口端５７ｃから噴出する硬化剤とは、カツプ状部
４の接液面５に衝突する以前に空中で合流して、
カツプ状部４の接液面５上の略同一位置に衝突す
るものとなる。 When such a configuration is adopted, the paint supply nozzles 56a and 56b and the curing agent supply nozzle 56c
Since the respective open ends 57a, 57b and 57c are spaced apart from each other, it is possible to prevent the paint base material and curing agent from curing around the open ends 57a, 57b and 57c. The paint base material spouted from the opening end 57a of the paint supply nozzle 56a, the opening end 57b of the paint supply nozzle 56b, or both, and the curing agent spouted from the opening end 57c of the hardening agent supply nozzle 56c are connected to a cup-shaped portion. Before colliding with the wetted surface 5 of 4, they merge in the air,
They collide at approximately the same position on the liquid contact surface 5 of the cup-shaped portion 4.
なお、上述の例においては、塗料供給ノズル部
１６を形成する塗料供給ノズル５６ａ及び５６ｂ
及び硬化剤供給ノズル５６ｃの夫々の開口端５７
ａ，５７ｂ及び５７ｃが、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て配されている
が、例えば、第８図に示される如く、塗料供給ノ
ズル部１６が塗料供給ノズル５８ａ及び５８ｂと
硬化剤供給ノズル５８ｃとで形成され、塗料供給
ノズル部１６の開口部１７を形成することにな
る、これら塗料供給ノズル５８ａ及び５８ｂ及び
硬化剤供給ノズル５８ｃの夫々の開口端５９ａ，
５９ｂ及び５９ｃが、相互間に微小な離隔距離を
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るものとされてもよ
い。 In the above example, the paint supply nozzles 56a and 56b forming the paint supply nozzle section 16
and each open end 57 of the curing agent supply nozzle 56c.
a, 57b, and 57c are arranged one on top of the other in a direction perpendicular to the rotational axis of the rotary atomizing head 2. For example, as shown in FIG. 58b and a curing agent supply nozzle 58c, which form the opening 17 of the paint supply nozzle section 16, and the respective opening ends 59a,
59b and 59c may be arranged in a direction along the circumference around the rotational axis of the rotary atomizing head 2 with a small distance between them.
さらに、第１図に示される静電塗装装置におけ
る回転霧化ヘツド２の内部において、上述の如く
に、塗料供給ノズル部１６の形状あるいは配置が
工夫されて、塗料供給ノズル部１６から供給され
る塗料主剤及び硬化剤、もしくは、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上の略同一位置に衝突するようにされ、そ
れによつて、接液面５上に塗料主剤と硬化剤と
の、もしくは、２種の塗料の夫々の適正な層が形
成されるようになされるにあたつては、塗料主剤
等が接液面５において脈流を形成することを防止
すべく、接液面５における塗料主剤等に対する流
動抵抗が小とされることが望まれる。 Furthermore, inside the rotary atomizing head 2 in the electrostatic coating device shown in FIG. The paint base agent and the curing agent, or two types of paints, are made to collide at approximately the same position on the liquid contact surface 5 of the cup-shaped part 4 in the rotary atomizing head 2, thereby causing the liquid contact surface 5 to In order to form an appropriate layer of the paint base and curing agent, or of each of the two types of paint, the paint base, etc. should form a pulsating flow on the wetted surface 5. In order to prevent this, it is desirable that the flow resistance to the paint main agent etc. on the liquid contact surface 5 be made small.
斯かる接液面５における塗料主剤等に対する流
動抵抗の低減が意図される場合には、回転霧化ヘ
ツド２は、例えば、第２図に示される如くの具体
構成を有するものとされる。 If it is intended to reduce the flow resistance of the paint base material on the liquid contact surface 5, the rotary atomizing head 2 may have a specific configuration as shown in FIG. 2, for example.
この具体構成例においては、回転霧化ヘツド２
は、それを構成するカツプ部４の接液面５に、塗
料供給ノズル部１６から供給される塗料主剤等に
対する流動抵抗を低減するための表面処理層４４
が形成されている。斯かる表面処理層４４は、例
えば、フツ素樹脂を塗布することにより得られる
フツ素樹脂塗膜、ニツケル及びフツ素樹脂が含有
されたメツキ層であるニツケル・フツ素樹脂含有
メツキ層、あるいは、溶融状態とされたモリブデ
ン粒子が吹付けられて得られるモリブデン溶射層
等により形成される。このとき、表面処理層４４
が形成されるカツプ状部４の接液面５の表面は、
その表面粗さが比較的小なるものとなるようにさ
れ、例えば、表面粗さを最大高によつて示す最大
表面粗さRmaxが0.5μ以下の値をとるものとされ
る。 In this specific configuration example, the rotary atomizing head 2
A surface treatment layer 44 is provided on the liquid contact surface 5 of the cup portion 4 constituting the cup portion 4 for reducing flow resistance to the paint base material etc. supplied from the paint supply nozzle portion 16.
is formed. Such surface treatment layer 44 is, for example, a fluororesin coating film obtained by applying a fluororesin, a plating layer containing nickel and fluororesin, or a plating layer containing nickel and fluororesin. It is formed by a molybdenum thermal spray layer obtained by spraying molten molybdenum particles. At this time, the surface treatment layer 44
The surface of the liquid contact surface 5 of the cup-shaped portion 4 where is formed is
The surface roughness is made to be relatively small, and for example, the maximum surface roughness Rmax, which indicates the surface roughness by the maximum height, is set to a value of 0.5 μ or less.
なお、上述の第１図に示される静電塗装装置に
おいて、塗料供給ノズル部１６は、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 electrostatic coating apparatus shown in FIG. Instead to,
It is also possible to use a paint supply nozzle section formed of only a plurality of paint supply nozzles.
（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、回転霧化
ヘツドの接液面に供給される塗料主剤及び硬化
剤、あるいは、複数種の塗料が、接液面において
回転霧化ヘツドの回転軸線に直交する方向に重な
る夫々の層を形成しつつ接液面の開放端に向つて
移動し、接液面の開放端から霧化放散されるもの
となされるので、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るようにすることが
でき、被塗装体の塗装面を光沢、硬度及び耐候性
等における斑のない優れたものとすることができ
る。(Effects of the Invention) As is clear from the above explanation, according to the rotary atomization electrostatic coating method according to the present invention, a paint base material and a curing agent, or a plurality of them, can be applied to a rotary atomization head for electrostatic coating. In supplying different types of paint individually and scattering them from the rotary atomizing head, the paint main agent and curing agent, or multiple types of paint supplied to the wetted surface of the rotary atomizing head, The atomizing head moves toward the open end of the liquid contact surface while forming overlapping layers in a direction perpendicular to the rotational axis of the rotating atomization head, and is atomized and dispersed from the open end of the liquid contact surface. , A state is obtained in which the paint main agent and curing agent, or multiple types of paints are properly mixed and atomized and dispersed, so that the paint is uniformly applied to the object to be painted. The coated surface of the object to be coated can be made to have excellent gloss, hardness, weather resistance, etc. without any unevenness.
第１図は本発明に係る回転霧化静電塗装方法の
一例の実施に使用される静電塗装装置の一例を示
す概略構成図、第２図、第４図及び第５図は第１
図に示される静電塗装装置における塗料供給ノズ
ル部の具体構成例の説明に供される一部破断面を
含む斜視図、第３図は第１図に示される静電塗装
装置が使用されて本発明に係る回転霧化静電塗装
方法の一例に基づいての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６図、第
７図及び第８図は第１図に示される静電塗装装置
における塗料供給ノズルの他の具体構成例の説明
に供される一部破断面を含む斜視図及び断面図、
第９図は第１図に示される静電塗装装置における
回転霧化ヘツドの具体構成例の説明に供される断
面図である。
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、１７は開口部、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、４４は
表面処理層である。
FIG. 1 is a schematic configuration diagram showing an example of an electrostatic coating device used for carrying out an example of the rotary atomization electrostatic coating method according to the present invention, and FIGS.
FIG. 3 is a perspective view including a partially broken surface for explaining a specific configuration example of the paint supply nozzle section in the electrostatic coating device shown in FIG. Graphs 6, 7, and 8 are shown in FIG. A perspective view and a sectional view including a partially broken surface for explaining another specific configuration example of the paint supply nozzle in the electrostatic coating device shown in
FIG. 9 is a sectional view illustrating a specific example of the structure of the rotary atomizing head in the electrostatic coating apparatus shown in FIG. 1. 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, 17 is an opening, 20a and 20b are paint supply pipes, 20c is a curing agent supply pipe,
32 and 33 are paint tanks, 34 is a curing agent tank, and 44 is a surface treatment layer.
Claims (1)
する開放端を有したカツプ内面状の接液面を備え
る静電塗装用回転霧化ヘツドを、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
べく駆動し、上記回転霧化ヘツドの接液面に上記
塗料主剤及び上記硬化剤の夫々を個別の供給通路
を通じて同時に供給して、上記回転霧化ヘツドの
接液面に供給された上記塗料主剤及び上記硬化剤
を、上記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、上記接液面の
開放端に向かつて移動するものとなすことを特徴
とする回転霧化静電塗装方法。 ２ 複数種の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静電塗装用回転霧
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し、上記回
転霧化ヘツドの接液面に上記複数種の塗料の夫々
を個別の供給通路を通じて同時に供給して、上記
回転霧化ヘツドの接液面に供給された上記複数種
の塗料を、上記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、上記接
液面の開放端に向かつて移動するものとなすこと
を特徴とする回転霧化静電塗装方法。[Scope of Claims] 1. A rotary atomizing head for electrostatic coating equipped with a liquid contact surface in the form of an inner surface of a cup having an open end for atomizing and dispersing a paint consisting of a paint main ingredient and a curing agent, is surrounded by the liquid contact surface. The rotary atomizing head is driven to rotate with a rotational axis line, and simultaneously supplies each of the paint base agent and the curing agent to the liquid contact surface of the rotary atomizing head through separate supply passages, thereby achieving the rotary atomizing head. The paint main ingredient and the curing agent supplied to the liquid contact surface of the head are directed 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. A rotary atomization electrostatic coating method characterized by using a moving object. 2. A rotary atomizing head for electrostatic coating, which is equipped with a wetted surface shaped like the inner surface of a cup and has an open end for atomizing and dispersing multiple types of paint, and rotates with a rotational axis surrounded by the wetted surface. and simultaneously supply each of the plurality of types of paints to the liquid contact surface of the rotary atomization head through separate supply passages, thereby reducing the number of paints supplied to the liquid contact surface of the rotary atomization head. The rotary atomizing head is characterized in that the paint is moved 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. Electric coating method.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6009086A JPS62216670A (en) | 1986-03-18 | 1986-03-18 | Rotary atomization electrostatic coating method |
| 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 |
|---|---|---|---|
| JP6009086A JPS62216670A (en) | 1986-03-18 | 1986-03-18 | Rotary atomization electrostatic coating method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62216670A JPS62216670A (en) | 1987-09-24 |
| JPH0439389B2 true JPH0439389B2 (en) | 1992-06-29 |
Family
ID=13132043
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6009086A Granted JPS62216670A (en) | 1986-03-18 | 1986-03-18 | Rotary atomization electrostatic coating method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62216670A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2776951B2 (en) * | 1990-03-29 | 1998-07-16 | マツダ株式会社 | Rotary atomizing electrostatic coating equipment |
| DE102006022057B3 (en) * | 2006-05-11 | 2007-10-31 | Dürr Systems GmbH | Rotary atomizer`s application unit for use in varnishing machine, has surface layer, on which thin coating medium with specific film thickness is formed, where layer reduces boundary surface friction between medium and overflow surface |
| JP5830612B2 (en) * | 2012-10-01 | 2015-12-09 | 日産自動車株式会社 | Bell cup of rotary atomizing electrostatic coating equipment |
| WO2018193069A1 (en) * | 2017-04-21 | 2018-10-25 | J. Wagner Gmbh | Method for controlling an electrostatic atomiser for liquids |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6214959A (en) * | 1985-07-11 | 1987-01-23 | Asahi Okuma Ind Co Ltd | Rotary atomizing head for electrostatic painting |
-
1986
- 1986-03-18 JP JP6009086A patent/JPS62216670A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6214959A (en) * | 1985-07-11 | 1987-01-23 | Asahi Okuma Ind Co Ltd | Rotary atomizing head for electrostatic painting |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62216670A (en) | 1987-09-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7971805B2 (en) | Atomizer | |
| JP4428973B2 (en) | Rotating atomizing coating apparatus and coating method | |
| US5800867A (en) | Deflection control of liquid or powder stream during dispensing | |
| TWI220868B (en) | Multicolored pattern coating facilities and multicolored pattern coating method | |
| EP0109224A2 (en) | Rotary liquid sprayer | |
| US5934574A (en) | Rotary atomizer | |
| JPH0439389B2 (en) | ||
| US3224680A (en) | Atomizing apparatus having a liquid accumulation cavity | |
| WO2009104543A1 (en) | Coating device | |
| JPS63166453A (en) | Rotary atomizing electrostatic painting apparatus | |
| JPH07251099A (en) | Method for electrostatic coating and apparatus therefor | |
| JPH0474059B2 (en) | ||
| JPH0474062B2 (en) | ||
| JPH03127654A (en) | Electrostatic coating device and rotary member therefor | |
| JPH0474061B2 (en) | ||
| KR102039412B1 (en) | Spray nozzle for spray painting apparatus | |
| JPH0474060B2 (en) | ||
| JPH07100150B2 (en) | A method for supplying paint to the rotary atomizing head of a sprayer | |
| JP3223032B2 (en) | Electrostatic coating machine | |
| JP4542692B2 (en) | Two-component mixed coating equipment | |
| JP2776951B2 (en) | Rotary atomizing electrostatic coating equipment | |
| JP2000167446A (en) | Coating head | |
| CA2367254C (en) | A spraying method and a spray system for coating liquids | |
| JPH01135553A (en) | Rotation atomizing coating apparatus | |
| JPH0222051Y2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |