JPS62216661A - Rotating atomization electrostatic coating device - Google Patents
Rotating atomization electrostatic coating deviceInfo
- Publication number
- JPS62216661A JPS62216661A JP6009186A JP6009186A JPS62216661A JP S62216661 A JPS62216661 A JP S62216661A JP 6009186 A JP6009186 A JP 6009186A JP 6009186 A JP6009186 A JP 6009186A JP S62216661 A JPS62216661 A JP S62216661A
- Authority
- JP
- Japan
- Prior art keywords
- paint
- curing agent
- liquid contact
- supply nozzle
- contact surface
- 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.)
- Granted
Links
- 238000000889 atomisation Methods 0.000 title claims abstract description 39
- 238000009503 electrostatic coating Methods 0.000 title claims description 21
- 239000003973 paint Substances 0.000 claims abstract description 208
- 239000007788 liquid Substances 0.000 claims abstract description 77
- 239000003795 chemical substances by application Substances 0.000 abstract description 104
- 239000011248 coating agent Substances 0.000 abstract description 9
- 238000000576 coating method Methods 0.000 abstract description 9
- 238000004140 cleaning Methods 0.000 description 16
- 239000000463 material Substances 0.000 description 16
- 239000004925 Acrylic resin Substances 0.000 description 14
- 229920000178 Acrylic resin Polymers 0.000 description 14
- 239000012948 isocyanate Substances 0.000 description 7
- 150000002513 isocyanates Chemical class 0.000 description 7
- 239000004848 polyfunctional curative Substances 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
- 238000010422 painting Methods 0.000 description 5
- 239000012459 cleaning agent Substances 0.000 description 4
- 239000010419 fine particle Substances 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 239000002075 main ingredient Substances 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
- 230000015572 biosynthetic process Effects 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
- 230000007812 deficiency Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005686 electrostatic field Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000002360 preparation method Methods 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
- 239000007921 spray 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
Abstract
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ッ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に関する。Detailed Description of the Invention (Industrial Application Field) The present invention atomizes and disperses liquid paint using a rotating atomization 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 device for coating.
（従来の技術）
自動車の車体の表面に、その全体に亙って均一に塗料を
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、静電塗装にあっては、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、従って、
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 painting using such an electrostatic coating device, that is, in electrostatic painting, a high DC voltage is applied between the object to be painted and an atomizer placed opposite thereto that atomizes and disperses the paint. An electrostatic field is formed to charge the paint atomized and dispersed from the atomizer, and it adheres to the object to be painted using electrostatic adsorption. By adopting such electrostatic coating, it is possible to improve the adhesion efficiency of paint to the object to be painted, and therefore,
This means that paint loss can be reduced.
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は
乾燥型の塗料が用いられる。被塗装体に塗布された焼付
は乾燥型の塗料は、例えば、１４０℃程度の加温雰囲気
中で硬化せしめられる。When such electrostatic coating is performed, if the object to be coated is metal, a dry paint such as a melamine alkyd resin paint is usually used for baking. The dry-baking paint applied to the object to be painted is cured in a heated atmosphere at, for example, about 140°C.
これに対し、被塗装体がプラスチッ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。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。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.
従って、斯かる二液型塗料が用いられての静電塗装が行
われるにあたっては、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
よって混合された後に噴霧器に供給されて、噴Ｉｌｌに
よ尋二峨型塗餌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、−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
が比較的大となってしまう問題がある。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, and the paint base and hardener are mixed by the mixer. It is then supplied to an atomizer, so that the atomization and dispersion of the atomized bait is carried out by the spray Ill. 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 during the entire 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ッドを備え、この回転霧化ヘッド
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
化ヘッド内で塗料主剤と硬化剤とを混合させ、それによ
って得られる二液型塗料を回転霧化ヘッドの回転による
遠心力によっ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ッドの内周
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っては、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
剤によって回転霧化ヘッ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 material 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, and the main paint material and the curing agent are mixed in the rotary atomizing head. The resulting two-component paint is atomized and dispersed by the centrifugal force generated by the rotation of a rotary atomizing head, and does not use a combination of an atomizer and a mixer for mixing the paint base and curing agent. A rotary atomization electrostatic coating device has been proposed. 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. 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, the cleaning agent supplied from the cleaning agent supply nozzle is used to control the rotary atomizing head. The inner peripheral surface is cleaned,
Preparations are made for changing the color of the paint base material, and time loss during the painting process associated with changing the color of the paint base material 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、回転霧化ヘッド
の内周面に供給された塗料主剤及び硬化剤は、回転霧化
ヘッドが高速で回転することにより生じる遠心力により
瞬時に回転霧化ヘッドの端縁部に達し、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ッドの
内周面に別個に供給される塗料主剤及び硬化剤が、個々
に回転霧化ヘッドの端縁部から飛散せしめられることに
なり、その結果、回転霧化ヘッ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。(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 supplied to the inner peripheral surface of the rotary atomizing head. The base agent and curing agent instantly reach the edge of the rotary atomization head due to the centrifugal force generated by the rotation of the rotary atomization head at high speed, and are scattered therefrom. 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 rotating atomizing head may not be able to properly mix the paint base material and the curing agent and atomize and disperse them.
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
ってしまうという不都合がある。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、回転霧化ヘッドに対して塗
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ッドから飛散せしめるに
あたり、回転霧化ヘッ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回転霧化静電塗装装置を提供するこ
とを目的とする。In view of this, the present invention provides a method for supplying a paint main ingredient and a curing agent, or a plurality of types of paints individually to a rotating atomizing head, and scattering them from the rotating atomizing head. The atomization head separates the paint base and curing agent.
Alternatively, a state can be obtained in which multiple types of paint are properly mixed and atomized and dispersed, and as a result, the paint is applied uniformly to the object to be painted, and the painted surface of the object to be painted becomes glossy and hard. It is also an object of the present invention to provide a rotary atomization electrostatic coating device that can provide excellent weather resistance without unevenness.
（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ップ内
面状の接液面を備える回転霧化ヘッドと、回転霧化ヘッ
ドを接液面により包囲される回転軸線をもって回転する
ものとすべく駆動する回転駆動手段と、夫々の開口端か
ら回転霧化ヘッドの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、夫々の開口端が
回転霧化ヘッドの接液面の近傍において回転霧化ヘッド
の回転軸線に直交する方向に階層を形成して配されるも
のなされて構成される。(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 contact 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 so as to rotate about a rotational axis surrounded by a liquid contact surface, and a rotary drive means for driving the rotary atomization head to rotate about a rotation axis surrounded by a liquid contact surface; and a plurality of supply nozzles that supply a plurality of supply nozzles, each of which has an open end forming a hierarchy in a direction perpendicular to the rotational axis of the rotary atomization head in the vicinity of the liquid contact surface of the rotary atomization head. What is arranged is made and composed.
（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
装置においては、駆動手段によって回転駆動される回転
霧化ヘッ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、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
において回転霧化ヘッドの回転軸線に直行する方向に階
層を形成して配されているので、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、あるいは
、複数種の塗料は、接液面上の略同−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ッド
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って移動する。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、回転霧化ヘッ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 according to the present invention configured as described above, the paint base material, curing agent, Alternatively, each of the plurality of types of paint is supplied individually and simultaneously from the respective open ends of the plurality of supply nozzles. At this time, since the opening ends of each of the plurality of supply nozzles are arranged in a layered manner in the direction perpendicular to the rotational axis of the rotary atomizing head near the liquid contact surface, each of the plurality of supply nozzles The paint main agent and curing agent or multiple types of paints that are ejected from the opening end collide at approximately the same position on the wetted surface, and after the collision, the atomization head rotates on the wetted surface. It moves toward the open end of the liquid contact surface while forming layers that overlap in a direction perpendicular to the axis of rotation. For example, a paint base agent and a curing agent that form a double layer on the liquid contact surface, or multiple types of paint that form multiple layers on the liquid contact surface,
The liquid is atomized and dispersed from the open end of the liquid contact surface in a multi-layered or multi-layered state. As a result, each of the fine particles of the atomized paint forms a double layer or multiple layers, and as a result, the rotating 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、回転霧化ヘッド２が、
カップ状部４及びカップ状部４の中央部に設けられたハ
ブ６から構成されている。カップ状部４は、大径開口端
部４ａ及び小径開口端部４ｂを存し、それらの間におけ
るカップ状内周面が接液面５とされている。そして、カ
ップ状部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。カップ状部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、ノ＼プロ
におけるカップ状部４の小径開口端部４ｂ側に位置する
端部には、回転霧化ヘッド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を介してカップ状部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によって、回転霧化ヘッド２は、カップ状部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って、高速で回転される。In the example shown in FIG. 2, the rotating atomization head 2 is
It is composed of a cup-shaped part 4 and a hub 6 provided at the center of the cup-shaped part 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. A large number of through holes 8 are formed at the connection portion between the cup-shaped portion 4 and the hub 6. In addition, an air motor 11 for rotationally driving the rotary atomizing head 2 is connected to the end of the cup-shaped part 4 on the small-diameter opening end 4b side of the cup-shaped part 4 in the no. Part 4
A rotating shaft 12 extending inward is connected. The rotary atomizing head 2 is surrounded by the liquid contact surface 5 of the cup-shaped part 4 and rotated at high speed by the air motor 11 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、ブラケット１４が固定されており
、ブラケット１４の所定位置には、塗料供給ノズル部１
６が、その開口部１７をカップ状部４の小径開口端部４
ｂ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、塗料供給用バイブ
２０ａ及び２０ｂの夫々の一端及び硬化剤供給用バイブ
２０ｃの一端が接続されている。塗料供給用バイブ２０
ａ及び２０ｂは、夫々、流量調整器２２及び２３、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。A bracket 14 is fixed to the air motor 11, and a paint supply nozzle portion 1 is installed at a predetermined position of the bracket 14.
6 connects the opening 17 to the small diameter open end 4 of the cup-shaped portion 4.
It is attached close to the liquid contact surface 5 through b. One end of each of paint supplying vibrators 20a and 20b and one end of a curing agent supplying vibrator 20c are connected to this paint supply nozzle section 16. Paint supply vibrator 20
a and 20b are provided with flow rate regulators 22 and 23 and pumps 26 and 27, respectively, and their other ends are inserted into paint tanks 32 and 33.
また、硬化剤供給用バイブ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。Further, the curing agent supplying vibrator 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。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.
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、塗料供給用バイブ２０ａ及び２０ｂ内を流れる塗料
主剤、及び、硬化剤供給用バイブ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。Further, in the curing agent tank 34, for example, an isocyanate-based curing agent is stored. And the flow rate regulators 22 to 24
It is possible to independently adjust the amount of the paint main agent flowing in the paint supplying vibrator 20a and 20b and the amount of the curing agent flowing in the curing agent supplying vibrator 20c.
さらに、ブラケット１４には、洗浄液供給ノズル１８が
、その開口端１８ａをカップ状部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、洗浄液供給用バイブ
３５の一端が連結されており、洗浄液供給用バイブ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３８内
に挿入されるものとなされている。Furthermore, the cleaning liquid supply nozzle 18 is attached to the bracket 14, and the opening end 18a of the cleaning liquid supply nozzle 18 is connected to the small diameter opening end 4b of the cup-shaped portion 4.
It is attached in close proximity to the liquid contact surface 5 through the holder. One end of a cleaning liquid supplying vibrator 35 is connected to this cleaning liquid supply nozzle 18 .
is provided with a flow rate regulator 36 and a pump 37, and the other end is inserted into a cleaning liquid tank 38 in which cleaning liquid such as thinner is stored.
第１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１図に示される塗料供給ノズル部
１６の具体的−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
用バイブ２０ａ及び２０ｂ及び硬化剤供給用バイブ２゜
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、回転霧化ヘッド２におけるカップ状部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、
回転霧化ヘッド２の回転軸線に直交する方向、即ち、カ
ップ状部４の半径方向に積み重ねられて階層を形成する
ように配されている。FIG. 1 shows the above-mentioned paint supply nozzle section 16 and its surroundings in an enlarged manner. In the specific example of the paint supply nozzle section 16 shown in FIG. and 16b and the hardening agent supply nozzle 16c are connected to one end of each of the paint supplying vibes 20a and 20b and the hardening agent supplying vibe 2°C, respectively. These paint supply nozzles 16a and 16b and curing agent supply nozzle 16c
means that the opening 17 of the paint supply nozzle portion 16 is located near the liquid contact surface 5 of the cup-shaped portion 4 of the rotary atomization head 2.
The respective open ends 17a, 17b and 17c forming the
They are stacked in a direction perpendicular to the axis of rotation of the rotary atomizing head 2, that is, in the radial direction of the cup-shaped portion 4, so as to form a hierarchy.
なお、図示されていないが、カップ状部４及びハブ６か
ら成る回転霧化ヘッド２と被塗装体との間には、例えば
、回転霧化ヘッド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 rotating atomizing head 2 consisting of the cup-shaped portion 4 and the hub 6 and the object to be coated, with the rotating atomizing head 2 side being the negative electrode 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
われるにあたっては、先ず、エアモーフ１１が作動せし
められ、回転霧化ヘッド２が、上述されたカップ状部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って、例えば、２００００〜３
００００ ｒｐｍの回転数で回転する状態とされる。こ
のとき、回転霧化ヘッド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 with the above-described configuration, first, the air morph 11 is activated, and the rotary atomizing head 2 moves into the cup-shaped portion 4 described above.
For example, 20,000 to 3
It is set to rotate at a rotation speed of 0000 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、塗料供給用バイブ２０
ｂ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２
４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 hardener stored in the hardener tank 34 are turned into a paint. Supply vibe 20
b and the curing agent supply pipe 20c, the liquid is guided to the paint supply nozzle 16b and the curing agent supply nozzle 16c in the paint supply nozzle section 16. At that time, the flow rate regulators 23 and 2
The metering according to 4 is carried out.
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に夫々翼かれた塗料
主剤及び硬化剤は、塗料供給ノズル１６ｂの開口端１７
ｂ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ッド２における
カップ状部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及び硬化剤供給
ノズル１６ｃの開口端１７ｃは、第１図に示される如く
、カップ状部４の接液面５の近傍において、回転霧化ヘ
ッド２の回転軸線に直交する方向、即ち、カップ状部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
剤とが、回動する接液面５上の略同−位置に衝突せしめ
られることになる。Then, the paint main agent and curing agent that are respectively fed to the paint supply nozzle 16b and the curing agent supply nozzle 16c in the paint supply nozzle section 16 are transferred to the opening end 17 of the paint supply nozzle 16b.
b 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 atomization 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 part 4, as shown in FIG. The direction perpendicular to the axis of rotation, that is, the cup-shaped portion 4
are arranged so as to be overlapped in the radial direction, so that the paint base material ejected from the open end 17b of the paint supply nozzle 16b and the curing agent ejected from the open end 17c of the curing agent supply nozzle 16C are rotated in contact with the liquid. The collision will occur at approximately the same position on the surface 5.
このようにして、回動する接液面５上の略同−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に沿って移動せしめられて、カップ状部４とハブ６と
の接続部に形成された多数の透孔８を介してカップ状部
４の大径開口端部４ａ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−位置に衝突せしめられて接
液面５に沿って流れる塗料主剤及び硬化剤は、回転霧化
ヘッド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ッド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の開放端に向かって移動していくものとなるので
ある。In this way, the paint base material and the curing agent collide with each other at approximately the same position on the rotating liquid contact surface 5, and are then moved along the liquid contact surface 5 and form the cup-shaped portion 4. A flow is formed toward the large-diameter open end 4a of the cup-shaped portion 4 through a large number of through holes 8 formed at the connection portion with the hub 6. The paint main agent and curing agent that collide with the liquid contact surface 5 at approximately the same position and flow along the liquid contact surface 5 are subjected to the action of centrifugal force caused by the high speed rotation of the rotary atomization head 2. Well, second
As shown in the figure, on the wetted surface 5, for example, the main paint component with a higher specific gravity forms a layer Fa in contact with the wetted surface 5, and the curing agent with a lower specific gravity forms a layer Fa that is in contact with the wetted surface 5. A layer Fi is formed in contact with the 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 atomization 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、カップ状部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Ｆ１を形成して到達した
塗料主剤及び硬化剤は、回転霧化ヘッド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ＮＦｉ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、回転霧化ヘッド２におけるカ
ップ状部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 ingredient and curing agent that reach the large-diameter opening end 4a of the cup-shaped part 4, that is, the open end of the liquid contact surface 5, forming the layer Fa and the layer F1, are transferred to the high speed of the rotating atomization head 2. Due to the centrifugal force accompanying the rotation, fine particles R are formed and atomized and dispersed from the open end of the liquid contact surface 5. At this time, the paint base material and curing agent are atomized and dispersed while forming the layers Fa and NFi, so each of the fine particles R contains a layer of the paint base material and hardening agent, and rotational atomization occurs. From the large-diameter opening end 4a of the cup-shaped portion 4 in the head 2, the atomized paint is dispersed in a state in which the main paint agent and the curing agent are appropriately mixed.
従って、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：ｌの
重量比をもっ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, the surface of the object to be painted is coated with a paint obtained by mixing an acrylic resin paint base containing a white pigment and an isocyanate curing agent at a weight ratio of 3:1. be done.
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
るにあたっては、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。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 base and curing agent from the paint tank 33 and hardener tank 34 is stopped, and the cleaning liquid supply is stopped. Pump 37 provided on pipe 35 is activated.
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、洗浄液供給用バイブ３５を通じ、流゛景調整器
３６を介して洗浄液供給ノズル１８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ッ
ド２におけるカップ状部４の接液面５に供給されて、回
転霧化ヘッド２内の洗浄が行われる。As a result, the cleaning liquid such as thinner stored in the cleaning liquid tank 38 is guided to the cleaning liquid supply nozzle 18 via the cleaning liquid supplying vibrator 35 and the landscape adjuster 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 atomization head 2, and inside the rotary atomization head 2. 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、塗料供給用バイブ
２０ａ及び硬化剤供給用パイプ２０ｃを通じ、流ｆｆｌ
調整器２２及び２４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１６
ａ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ッド２におけるカッ
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及び硬化剤供給
ノズル１６ｃの開口端１７Ｃは、第１図に示される如く
、カップ状部４の接液面５の近傍において、回転霧化ヘ
ッド２の回転軸線に直交する方向、即ち、カップ状部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１７ｃから噴出する硬化
剤とが、回動する接液面５上の略同−位置に衝突せしめ
られることになる。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. Through the vibrator 20a and the curing agent supply pipe 20c, the flow ffl
The amount is metered by the regulators 22 and 24, and is guided to the paint supply nozzle 16a and the curing agent supply nozzle 16c in the paint supply nozzle section 16, and is further supplied to the paint supply nozzle 16.
The paint base material and curing agent respectively guided to the paint supply nozzle 16a and the curing agent supply nozzle 16c are simultaneously jetted out from the opening end 17a of the paint supply nozzle 16a and the opening end 17c of the curing agent supply nozzle 16c, and the rotary atomization head rotates at high speed. The liquid is supplied to the liquid contact surface 5 of the cup-shaped portion 4 at 2. At this time, as shown in FIG. 2, that is, the direction perpendicular to the rotational axis of the cup-shaped portion 4
are arranged so as to be overlapped in the radial direction, so that the paint base material ejected from the open end 17a of the paint supply nozzle 16a and the curing agent ejected from the open end 17c of the curing agent supply nozzle 16c are rotated in contact with the liquid. The collision will occur at approximately the same position on the surface 5.
従って、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ッド
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の開放端に向かって移動していき、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
化ヘッド２におけるカップ状部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って混合されて
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 manner as in the above case. It 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 base agent and curing agent appropriately 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 depositing the paint.
なお、第２図に示される例において、ポンプ２６．２７
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１７ｂ１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ッド２におけるカップ状部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１
７ａ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
、回動する接液面５上の略同−位置に衝突せしめられる
ことになる。In addition, in the example shown in FIG. 2, the pumps 26, 27
and 28 are operated simultaneously, and the paint tanks 32 and 33
The acrylic resin paint base containing the red pigment and the acrylic resin paint base containing the white pigment stored in the acrylic resin paint base and the isocyanate hardener stored in the hardening agent tank 34 are supplied to the paint supply pipes 20a and 20b, and The curing agent is guided through the curing agent supply pipe 20C to the paint supply nozzles 16a and 16b and the curing agent supply nozzle 16c in the paint supply nozzle section 16, and is further guided to the paint supply nozzle 16a.
and 16b, and the curing agent and the paint base agent respectively guided to the curing agent supply nozzle 16c are simultaneously ejected from the open ends 17a and 17b1 of the paint supply nozzles 16a and 16b and the open end 17C of the curing agent supply nozzle 16C, The liquid may be supplied to the liquid contact surface 5 of the cup-shaped portion 4 of the rotary atomization head 2 that rotates at high speed. In such a case, the open ends 1 of the paint supply nozzles 16a and 16b
The paint base sprayed from 7a and 17b, respectively, and the curing agent sprayed from the open end 17c of the curing agent supply nozzle 16c are made to collide at approximately 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１６ａ及び１
６ｂ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
おいて回転霧化ヘッド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の開放端に向かっ
て移動していき、接液面５の開放端から霧化成敗される
。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
をもっ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 nozzles 16a and 1
A mixture of two types of paint main ingredients and a curing agent are sprayed from the open ends 17a and 17b of the rotary atomizing head 2, respectively, on the liquid contact surface 5 in a direction perpendicular to the axis of rotation of the rotary atomizing head 2. It forms a layer and moves toward the open end of the liquid contact surface 5, and is atomized from the open end of the liquid contact surface 5. As a result, a paint obtained by mixing an acrylic resin paint base containing a red pigment, an acrylic resin paint base containing a white pigment, and an isocyanate curing agent in a predetermined weight ratio is applied to the surface of the object to be painted. The coating is applied in a homogeneous manner.
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３４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-mentioned example, the paint tanks 32 and 34 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ッド２におけるカップ状部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、回動する接液面５上の略同−位
置に衝突せしめられることになる。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, and furthermore, the paint supply nozzles 16a and 16b are
The paint introduced into the paint supply nozzles 16a and 1
The liquid is simultaneously ejected from the open ends 17a and 17b of 6b and supplied to the liquid contact surface 5 of the cup-shaped portion 4 of the rotary atomization 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, will collide at approximately 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１６
ｂ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
ッド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の開放端に向かって移動していき、
接液面５の開放端から霧化成敗される。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
量比をもっ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 nozzles 16a and 16
The two types of paint sprayed from the open ends 17a and 17b of the rotary atomizing head 2 form respective layers on the liquid contact surface 5, which are stacked in a direction perpendicular to the rotational axis of the rotary atomization head 2, depending on their specific gravity. forming and moving toward the open end of the liquid contact surface 5,
Atomization is carried out 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 a red paint and a 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ッド２に
おけるカップ状部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
り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 portion 4 of the rotary atomizing head 2, the distance 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、横軸に距離りがとられ、また、縦軸
に、Ｈｕｎ ｔｅｒ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ＡＩＬを設定
して色差ΔＥを求める実験を、距離りを異ならせて繰り
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
って、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−である場合
には７、色差ΔＥが極めて小となって、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, distance is plotted on the horizontal axis, and distance is plotted on the vertical axis, as calculated using a color difference meter based on Hunter's color difference formula, and the painted surface of the object to be painted and the two types of paints. The color difference ΔE from a standard painted board on which the mixed paint obtained by thoroughly mixing the paint was applied extremely uniformly was taken, and the experiment to determine the color difference ΔE by setting the distance AIL was repeated with different distances. The results are shown below. From this experimental result, the farther apart the collision points of the two types of paints on the wetted surface 5 are, the larger the color difference ΔE between the painted surface of the object to be painted and the standard painted board becomes, and the more the paint condition of the object to be painted increases. If the collision points on the wetted surface 5 of the two types of paint are approximately the same, the color difference ΔE will be extremely small, and the painted surface of the object will be coated with a homogeneous coating. It is clearly understood that it will be a good product with the following.
これよりして、２種の塗料を回転霧化ヘッド２における
カップ状部４の接液面５の略同−位置に衝突させること
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できることになる。An example of the rotary atomizing electrostatic coating device according to the present invention, in which two types of paint are collided at approximately the same position on the liquid contact surface 5 of the cup-shaped portion 4 of the rotary atomizing head 2. When electrostatic painting is carried out, the coated surface of the object to be coated can be of extremely high quality.
第４図及び第５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。FIGS. 4 and 5 show the main parts of another example of the rotary atomization electrostatic coating apparatus according to the present invention.
第４図に示される例においては、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とで形成される具体構成を有するものとされて
いる。そして、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、回転霧化ヘッド２におけるカップ状部４
の接液面５に近接した位置にあって、偏平な形状を有す
るものとされた状態で、回転霧化ヘッド２の回転軸線に
直交する方向、即ち、カップ状部４の半径方向に積み重
ねられて階層を形成す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 example shown in FIG. 4, the paint supply nozzle section 16
However, it has a specific configuration formed by paint supply nozzles 50a and 50b and a curing agent supply nozzle 50c. Then, the opening ends 51a and 51b of the paint supply nozzles 50a and 50b and the curing agent supply nozzle 50c, which form the opening 17 of the paint supply nozzle section 16, are opened.
and 51c are the cup-shaped portions 4 in the rotary atomization head 2;
The cup-shaped portions 4 are stacked in a direction perpendicular to the rotational axis of the rotary atomizing head 2, that is, in a radial direction of the cup-shaped portion 4, with the cup-shaped portions having a flat shape. They are arranged to form a hierarchy. 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とで形成される具体構成を存するものと
されており、硬化剤供給ノズル５２ｃの先端部が透孔４
０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５２
Ｃ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５２ｂ及び硬化剤供給ノズ
ル５２Ｃの夫々の開口端５３ａ、５３ｂ及び５３ｃが、
回転霧化ヘッド２におけるカップ状部４の接液面５に近
接した位置において、回転霧化ヘッド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。Further, in the example shown in FIG. 5, the paint supply nozzle section 16 has a specific configuration formed by paint supply nozzles 52a and 52b and a hardening agent supply nozzle 52c. The tip of 52c is through hole 4
Further, the tip of the paint supply nozzle 52b is inserted through the through hole 42 into the paint supply nozzle 52a. Then, the paint supply nozzles 52a and 52b and the curing agent supply nozzle 52
The respective open ends of the paint supply nozzles 52a and 52b and the curing agent supply nozzle 52C, which form the opening 17 of the paint supply nozzle section 16, whose respective tip ends of C form a multilayer. 53a, 53b and 53c are
At a position close to the liquid contact surface 5 of the cup-shaped part 4 in the rotary atomizing head 2, there is a portion that is stacked in a direction perpendicular to the rotational axis of the rotary atomizing head 2.
なお、第４図及び第５図に示される例における他の部分
の構成及び作用効果は、第１図及び第２図に示される例
と同様である。Note that the configuration and operation and effect of other parts in the example shown in FIGS. 4 and 5 are the same as in the example shown in FIGS. 1 and 2.
また、上述の例においては、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。Furthermore, in the above example, the paint supply nozzle section 16 is
Although it is supposed to include a curing agent supply nozzle in addition to the paint supply nozzle, instead of such a paint supply nozzle part 16,
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
電塗装装置によれば、静電塗装用回転霧化ヘッドに対し
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ッドから飛散させる
にあたり、回転霧化ヘッ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、接液面上の
略同−位置に衝突せしめられ、接液面において回転霧化
ヘッ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って移動し、接液面の開放
端から霧化成敗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
て霧化成敗される状態が得られる。従って、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
きて、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 description, according to the rotary atomizing electrostatic coating device according to the present invention, a paint base material and a curing agent, or a plurality of them, can be applied to the rotary atomizing head for electrostatic coating. In supplying different types of paint individually and scattering them from the rotating atomizing head, the paint base and curing agent, or multiple types of paints, are supplied to the wetted surface of the rotating atomizing head. The atomizers collide at approximately the same position on the liquid contact surface, and move toward the open end of the liquid contact surface while forming layers that overlap in a direction perpendicular to the rotational axis of the rotary atomization head on the liquid contact surface. Since the atomization is carried out from the open end of the atomizer, a state is obtained in which the main paint component and the curing agent, or a plurality of types of paints, are appropriately mixed and atomized. Therefore, the paint can be uniformly applied to the object to be painted, and the coated surface of the object to be painted 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装置の−例にお
け要部を示す一部破断面を含む斜視図、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図及び第５図は夫々本発明に係る回転霧化静電
塗装装置の他の例におけ要部を示す一部破断面を含む斜
視図である。
図中、２は回転霧化ヘッド、４はカップ状部、５は接液
面、１１はエアモータ、１６は塗料供給ノズル部、１６
ａ、１６ｂ、５０ａ、５０ｂ、５２ａ及び５２ｂは塗料
供給ノズル、１６ｃ、５０Ｃ及び５２ｃは硬化剤供給ノ
ズル、１７は開口部、１７ａ、Ｌ７ｂ、１７ｃ、５１ａ
、５１ｂ、５１ｃ、５３ａ、５３ｂ及び５’３ ｃは開
口端、２０ａ及び２０ｂは塗料供給用バイブ、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。FIG. 1 is a perspective view including a partially broken surface showing essential parts of an example of a rotary atomizing electrostatic coating device according to the present invention, and FIG. 2 is an example of a rotary atomizing electrostatic coating device according to the present invention. A schematic configuration diagram showing
FIG. 3 is a graph used to explain the coating state of an object to be coated using the examples shown in FIGS. 1 and 2, and FIGS. 4 and 5 are graphs according to the present invention, respectively. It is a perspective view including a partially broken surface showing the principal part in another example of a rotary atomization electrostatic coating device. 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 part, 16
a, 16b, 50a, 50b, 52a and 52b are paint supply nozzles, 16c, 50C and 52c are curing agent supply nozzles, 17 is an opening, 17a, L7b, 17c, 51a
, 51b, 51c, 53a, 53b and 5'3c are open ends, 20a and 20b are paint supplying vibes, 20c is a curing agent supplying pipe, 32 and 33 are paint tanks, and 34 is a curing agent tank.
Claims (1)
面を備える回転霧化ヘッドと、該回転霧化ヘッドを上記
接液面により包囲される回転軸線をもって回転するもの
とすべく駆動する回転駆動手段と、夫々の開口端が上記
回転霧化ヘッドの接液面の近傍において上記回転霧化ヘ
ッドの回転軸線に直交する方向に階層を形成して配され
、該夫々の開口端から上記接液面に塗料を供給する複数
の供給ノズルと、を備えて構成された回転霧化静電塗装
装置。a rotating atomizing head having a liquid contact surface in the form of an inner surface of a cup having an open end for atomizing and dispersing paint; and a rotating atomizing head driven to rotate with a rotational axis surrounded by the liquid contact surface. a rotary driving means, each of which has an open end arranged in a layered manner in a direction perpendicular to the rotational axis of the rotary atomizing head in the vicinity of the liquid contact surface of the rotary atomizing head; A rotary atomization electrostatic coating device comprising: a plurality of supply nozzles that supply paint to the liquid-contacted surface.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6009186A JPS62216661A (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 |
|---|---|---|---|
| JP6009186A JPS62216661A (en) | 1986-03-18 | 1986-03-18 | Rotating atomization electrostatic coating device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62216661A true JPS62216661A (en) | 1987-09-24 |
| JPH0474059B2 JPH0474059B2 (en) | 1992-11-25 |
Family
ID=13132071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6009186A Granted JPS62216661A (en) | 1986-03-18 | 1986-03-18 | Rotating atomization electrostatic coating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62216661A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004330186A (en) * | 2003-05-01 | 2004-11-25 | E I Du Pont De Nemours & Co | Method for coating with liquid coating by high speed rotational coating |
| JP2004330185A (en) * | 2003-05-01 | 2004-11-25 | E I Du Pont De Nemours & Co | High-speed rotary application method for liquid colored coating agent |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5745370A (en) * | 1980-08-30 | 1982-03-15 | Nippon Ranzubaagu Kk | Method for mixing and spraying different kind of liquid |
-
1986
- 1986-03-18 JP JP6009186A patent/JPS62216661A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5745370A (en) * | 1980-08-30 | 1982-03-15 | Nippon Ranzubaagu Kk | Method for mixing and spraying different kind of liquid |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004330186A (en) * | 2003-05-01 | 2004-11-25 | E I Du Pont De Nemours & Co | Method for coating with liquid coating by high speed rotational coating |
| JP2004330185A (en) * | 2003-05-01 | 2004-11-25 | E I Du Pont De Nemours & Co | High-speed rotary application method for liquid colored coating agent |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0474059B2 (en) | 1992-11-25 |
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| LAPS | Cancellation because of no payment of annual fees |