JPH0871455A - Rotating atomizing electrostatic coating device - Google Patents
Rotating atomizing electrostatic coating deviceInfo
- Publication number
- JPH0871455A JPH0871455A JP21555094A JP21555094A JPH0871455A JP H0871455 A JPH0871455 A JP H0871455A JP 21555094 A JP21555094 A JP 21555094A JP 21555094 A JP21555094 A JP 21555094A JP H0871455 A JPH0871455 A JP H0871455A
- Authority
- JP
- Japan
- Prior art keywords
- air
- atomizing head
- shaping
- electrostatic coating
- atomizing
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
- B05B5/0403—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member
- B05B5/0407—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces characterised by the rotating member with a spraying edge, e.g. like a cup or a bell
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B5/00—Electrostatic spraying apparatus; Spraying apparatus with means for charging the spray electrically; Apparatus for spraying liquids or other fluent materials by other electric means
- B05B5/025—Discharge apparatus, e.g. electrostatic spray guns
- B05B5/04—Discharge apparatus, e.g. electrostatic spray guns characterised by having rotary outlet or deflecting elements, i.e. spraying being also effected by centrifugal forces
- B05B5/0426—Means for supplying shaping gas
Landscapes
- Electrostatic Spraying Apparatus (AREA)
Abstract
(57)【要約】
【目的】 塗着効率を低下させることなく、均一な膜厚
分布を得る。
【構成】 霧化頭２４から放出される塗料粒子Ｔに向け
てシェーピングエアＡ1を噴射させる回転霧化静電塗装
装置２０において、霧化頭２４の外側に、シェーピング
エアＡ1 の噴射により生じる霧化頭前方の負圧領域４２
に向けてエアＡ2を吹き込むエアノズル３５を設ける。
(57) [Summary] [Purpose] To obtain a uniform film thickness distribution without lowering the coating efficiency. [Structure] In a rotary atomizing electrostatic coating device 20 in which shaping air A 1 is jetted toward paint particles T discharged from an atomizing head 24, the shaping air A 1 is jetted to the outside of the atomizing head 24. Negative pressure area 42 in front of the atomizing head
An air nozzle 35 that blows air A 2 toward is provided.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、微粒化した塗料を静電
力で被塗装物に吸着させる回転霧化静電塗装装置に関
し、とくに均一な膜厚分布を得ることが可能な回転霧化
静電塗装装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary atomizing electrostatic coating apparatus for adsorbing atomized paint onto an object to be coated by electrostatic force, and particularly to a rotary atomizing static coating capable of obtaining a uniform film thickness distribution. Electric coating equipment.
【０００２】[0002]
【従来の技術】アルミニウム片や雲母等を含むメタリッ
ク塗料による回転霧化静電塗装においては、被塗装物の
表面における塗料粒子の衝突速度が遅いと、被塗装物の
仕上がり外観が暗くなる。そこで、塗料粒子の被塗装物
表面への衝突速度を高めるために、霧化頭から放出され
るメタリック塗料に向けて高速のシェーピングエアを噴
出することが必要となる。霧化頭から放出されるメタリ
ック塗料にシェーピングエアを噴射させる塗装技術の一
例として、特開平３−１０１８５８号公報が知られてい
る。2. Description of the Related Art In rotary atomization electrostatic coating with metallic paint containing aluminum flakes, mica, etc., when the collision speed of paint particles on the surface of the object to be coated is low, the finished appearance of the object to be coated becomes dark. Therefore, it is necessary to eject high-speed shaping air toward the metallic paint discharged from the atomizing head in order to increase the collision speed of the paint particles on the surface of the object to be painted. Japanese Patent Application Laid-Open No. 3-101858 is known as an example of a coating technique for ejecting shaping air onto the metallic paint discharged from the atomizing head.
【０００３】[0003]
【発明が解決しようとする課題】しかし、図７および図
８に示すように、高速のシェーピングエアＡ1 を使用す
る回転霧化静電塗装装置１では、シェーピングエアノズ
ル２は霧化頭３の外側に円状に多数配置されているた
め、各シェーピングエアノズル２から高速のシェーピン
グエアＡ1 が噴射されると、霧化頭３の前方の圧力が低
下し、霧化頭３の前方には塗料粒子の存在しない負圧領
域６が形成される。その結果、被塗装物５がこの負圧領
域６に存在する条件（位置Ｂ′）で塗装を行った場合、
図１０に示すように、塗着パターンＴ1 は中心付近に穴
のあいた極端なドーナツ形状となる。塗着パターンＴ1
がドーナツ形状となった状態で塗装装置を矢印Ｆ方向に
レシプロさせて塗装を行うと、図１１に示すように、被
塗装物５の表面上には２つのピークをもつ２山分布の塗
膜Ｔ3 が形成され、塗装ムラを起こしてしまう。[SUMMARY OF THE INVENTION However, as shown in FIGS. 7 and 8, the rotary atomizing electrostatic coating apparatus 1 uses a high-speed shaping air A 1, shaping air nozzle 2 is outside of the atomizing head 3 Since many shaping air nozzles 2 are arranged in a circle, when the high-speed shaping air A 1 is ejected from each shaping air nozzle 2, the pressure in front of the atomizing head 3 is reduced, and paint particles are in front of the atomizing head 3. A negative pressure region 6 is formed in which no pressure exists. As a result, when the object 5 to be coated is coated under the condition that the negative pressure region 6 exists (position B '),
As shown in FIG. 10, the coating pattern T 1 has an extreme donut shape with a hole near the center. Coating pattern T 1
When the coating device is reciprocated in the direction of the arrow F in a donut shape, the coating 5 has two peaks on the surface of the object 5 to be coated, as shown in FIG. T 3 is formed, causing uneven coating.
【０００４】従来では、この塗装ムラを抑えるために、
吹き付け距離を位置Ｂ2 まで離して負圧領域６の外へ被
塗装物５を配置し、図９に示す塗着パターンＴ2 を得る
ようにしているが、吹き付け距離が長いと、周囲の空気
の抵抗を受けて、被塗装物５へ向かう塗料粒子の減速も
大きくなる。そこで、塗料粒子の衝突速度を高めるため
に、さらに高速でシェーピングエアＡ1 を噴射させてい
る。その結果、塗料粒子の拡散が多くなり、塗着効率が
低下し塗料のコストアップを招くという問題が生じる。
また、より高速のシェーピングエアＡ1 を噴出すること
は、被塗装物５に塗着せず空気中に舞い上がる塗料ダス
トが増えるため、塗装機への塗料の付着量も増加し、塗
装不良の原因となる。Conventionally, in order to suppress the uneven coating,
The object to be coated 5 is arranged outside the negative pressure region 6 by separating the spraying distance to the position B 2 so as to obtain the coating pattern T 2 shown in FIG. 9. However, when the spraying distance is long, the surrounding air is blown. As a result, the deceleration of the paint particles toward the article 5 to be coated also increases. Therefore, in order to increase the collision speed of the paint particles, the shaping air A 1 is jetted at a higher speed. As a result, there is a problem in that the paint particles are diffused a lot, the coating efficiency is lowered, and the cost of the paint is increased.
Further, blowing out the shaping air A 1 at a higher speed increases the amount of paint dust that does not adhere to the object to be coated 5 and floats in the air, increasing the amount of paint adhering to the coating machine and causing a coating failure. Become.
【０００５】本発明の目的は、塗着効率を低下させるこ
となく、均一な膜厚分布を得ることが可能な回転霧化静
電塗装装置を提供することにある。An object of the present invention is to provide a rotary atomizing electrostatic coating apparatus capable of obtaining a uniform film thickness distribution without lowering the coating efficiency.
【０００６】[0006]
【課題を解決するための手段】この目的を達成するため
の本発明に係る回転霧化静電塗装装置は、霧化頭から放
出される塗料粒子に向けてシェーピングエアを噴射させ
る回転霧化静電塗装装置において、前記霧化頭の外側
に、前記シェーピングエアの噴射により生じる霧化頭前
方の負圧領域に向けてエアを吹き込むエアノズルを設け
たものから成る。To achieve this object, a rotary atomizing electrostatic coating apparatus according to the present invention is a rotary atomizing static spraying apparatus that sprays shaping air toward paint particles discharged from an atomizing head. In the electrocoating device, an air nozzle for blowing air toward a negative pressure region in front of the atomizing head generated by the injection of the shaping air is provided outside the atomizing head.
【０００７】[0007]
【作用】本発明に係る回転霧化静電塗装装置において
は、霧化頭の前方に生じた負圧領域に向けてエアノズル
からエアが吹き込まれるので、霧化頭の前方の圧力が上
昇し、負圧領域が縮小する。そのため、回転霧化静電塗
装装置と被塗装物との間の距離を短かく設定しても、塗
着パターンがドーナツ形状にならず、均一な膜厚分布が
得られる。また、回転霧化静電塗装装置と被塗装物との
間の距離が短かくなることから、シェーピングエアの速
度を抑制することが可能となり、塗料粒子の拡散による
塗着効率の低下も解消される。In the rotary atomizing electrostatic coating device according to the present invention, since air is blown from the air nozzle toward the negative pressure region generated in front of the atomizing head, the pressure in front of the atomizing head rises, Negative pressure area is reduced. Therefore, even if the distance between the rotary atomizing electrostatic coating device and the object to be coated is set to be short, the coating pattern does not have a donut shape, and a uniform film thickness distribution can be obtained. Further, since the distance between the rotary atomizing electrostatic coating device and the object to be coated becomes short, the speed of shaping air can be suppressed, and the decrease in coating efficiency due to the diffusion of coating particles is also eliminated. It
【０００８】[0008]
【実施例】図１ないし図３は本発明の第１実施例を示
し、図４は本発明の第２実施例を示し、図５および図６
は本発明の第３実施例を示している。まず、各実施例に
わたって共通な構成、作用を例えば図１を参照して説明
する。ただし、共通構成部分には各実施例にわたって同
一符号を使用している。1 to 3 show a first embodiment of the present invention, FIG. 4 shows a second embodiment of the present invention, and FIGS.
Shows a third embodiment of the present invention. First, the configuration and operation common to each embodiment will be described with reference to FIG. 1, for example. However, the same reference numerals are used for the common components throughout the respective embodiments.
【０００９】図１において、２０は回転霧化静電塗装装
置を示している。回転霧化静電塗装装置２０は、軸方向
に延びる樹脂ハウジング２１を有している。樹脂ハウジ
ング２１内には、エアモータ２２が収納されている。エ
アモータ２２の回転軸２３には、カップ状の霧化頭２４
が取付けられている。回転軸２３には、軸方向に延びる
中空部（図示略）が形成されており、この中空部には霧
化頭２４にメタリック塗料を供給する塗料供給ノズル
（図示略）が配置されている。In FIG. 1, reference numeral 20 denotes a rotary atomizing electrostatic coating device. The rotary atomizing electrostatic coating device 20 has a resin housing 21 extending in the axial direction. An air motor 22 is housed in the resin housing 21. The rotary shaft 23 of the air motor 22 has a cup-shaped atomizing head 24.
Is installed. A hollow portion (not shown) extending in the axial direction is formed on the rotary shaft 23, and a paint supply nozzle (not shown) for supplying the metallic paint to the atomizing head 24 is arranged in the hollow portion.
【００１０】塗料供給ノズルから霧化頭２４に供給され
たメタリック塗料は、霧化頭２４の高速回転による遠心
力によって霧化頭２４から半径方向外方に飛散するよう
になっている。樹脂ハウジング２１内には、霧化頭２４
から放出されるメタリック塗料に静電気を帯電させる高
電圧発生器２５が収納されている。高電圧発生器２５
は、ケーブルを介して制御装置２７に接続されている。The metallic paint supplied from the paint supply nozzle to the atomizing head 24 is scattered outward in the radial direction from the atomizing head 24 by the centrifugal force generated by the high speed rotation of the atomizing head 24. Inside the resin housing 21, the atomizing head 24
A high voltage generator 25 for charging the metallic paint discharged from the device with static electricity is housed. High voltage generator 25
Is connected to the control device 27 via a cable.
【００１１】霧化頭２４の外側には、エアキャップ３０
が設けられている。エアキャップ３０は、樹脂ハウジン
グ２１の端面に固定されている。エアキャップ３０に
は、周方向に延びるエア通路３１が形成されている。エ
アキャップ３０には、霧化頭２４から放出される塗料粒
子Ｔに向けてシェーピングエアＡ1 を噴射させる多数の
シェーピングエアノズル３２が形成されている。多数の
シェーピングエアノズル３２は、回転軸２３の回転中心
２３ａを中心として同心状に配置されている。シェーピ
ングエアノズル３２から噴射されるシェーピングエアＡ
1 の噴射方向は、噴霧パターン幅を広げるために回転軸
２３に対して３０〜４０度ねじれた方向に設定されてい
る。An air cap 30 is provided on the outer side of the atomizing head 24.
Is provided. The air cap 30 is fixed to the end surface of the resin housing 21. An air passage 31 extending in the circumferential direction is formed in the air cap 30. The air cap 30 is formed with a number of shaping air nozzles 32 for injecting the shaping air A 1 toward the paint particles T discharged from the atomizing head 24. The large number of shaping air nozzles 32 are arranged concentrically around the rotation center 23 a of the rotation shaft 23. Shaping air A ejected from the shaping air nozzle 32
The injection direction of 1 is set in a direction twisted by 30 to 40 degrees with respect to the rotary shaft 23 in order to widen the spray pattern width.
【００１２】つぎに、各実施例にわたって共通な作用
を、図１を参照して説明する。高速回転する霧化頭２４
の内側にメタリック塗料が供給されると、メタリック塗
料は、霧化頭２４の高速回転による遠心力によって霧化
頭２４から半径方向外方に飛散する。多数のシェーピン
グエアノズル３２からは、霧化頭２４から放出されるメ
タリック塗料の塗料粒子Ｔに向けてシェーピングエアＡ
1 が噴射されるので、塗料粒子Ｔの被塗装物４０の表面
への衝突速度が高められ、被塗装物４０の仕上がり外観
が明るくなる。また、シェーピングエアＡ1 の噴射方向
を回転軸２３に対してねじっているので、霧化頭２４か
ら放出された塗料粒子Ｔを半径方向外方に飛行させるこ
とができ、噴霧パターン幅を広げることができる。Next, the operation common to each embodiment will be described with reference to FIG. Atomizing head 24 rotating at high speed
When the metallic paint is supplied to the inside of the, the metallic paint is scattered radially outward from the atomizing head 24 by the centrifugal force generated by the high speed rotation of the atomizing head 24. From the numerous shaping air nozzles 32, the shaping air A is directed toward the paint particles T of the metallic paint discharged from the atomizing head 24.
Since 1 is sprayed, the collision speed of the paint particles T on the surface of the object 40 to be coated is increased, and the finished appearance of the object 40 to be coated becomes bright. Further, since the injection direction of the shaping air A 1 is twisted with respect to the rotary shaft 23, the paint particles T emitted from the atomizing head 24 can be made to fly radially outward, and the spray pattern width can be widened. You can
【００１３】つきに、第１実施例に特有な構成、作用に
ついて説明する。図１および図２に示すように、エアキ
ャップ３０には、多数のエアノズル３５が形成されてい
る。多数のエアノズル３５は、回転軸２３の回転中心２
３ａを中心として同心状に配置されている。エアノズル
３５は、シェーピングエアノズル３２よりも内側に配置
されている。すなわち、エアキャップ３０には、回転軸
２３に対して同心状に複数列のエアノズル３２、３５が
形成されている。エアノズル３５は、シェーピングエア
Ａ1 の噴射により生じる霧化頭２４の前方の負圧領域４
２に向けてエアＡ2 を吹き込むものである。エアノズル
３５は、回転軸２３に対して内向きとなっており、エア
ノズル３５から噴射されるエアＡ2 の噴射方向は例えば
回転軸２３の延長線上に設定されている。The structure and operation peculiar to the first embodiment will be described. As shown in FIGS. 1 and 2, the air cap 30 is provided with a large number of air nozzles 35. The large number of air nozzles 35 serve as the center of rotation 2
They are arranged concentrically around 3a. The air nozzle 35 is arranged inside the shaping air nozzle 32. That is, in the air cap 30, a plurality of rows of air nozzles 32 and 35 are formed concentrically with the rotating shaft 23. The air nozzle 35 is provided in the negative pressure region 4 in front of the atomizing head 24 generated by the injection of the shaping air A 1.
Air A 2 is blown toward 2. The air nozzle 35 is directed inward with respect to the rotary shaft 23, and the jetting direction of the air A 2 jetted from the air nozzle 35 is set on, for example, an extension line of the rotary shaft 23.
【００１４】図２に示すように、本実施例ではシェーピ
ングエアノズル３２の数とエアノズル３５の数は同一に
なっている。エアノズル３５の径は、シェーピングエア
ノズル３２の径よりも小となっている。シェーピングノ
ズル３２とエアノズル３５は、回転軸２３の回転中心２
３ａを通る同一線上に位置しておらず、エアノズル３５
は隣接するシェーピングノズル３２の間に位置してい
る。As shown in FIG. 2, in this embodiment, the number of shaping air nozzles 32 and the number of air nozzles 35 are the same. The diameter of the air nozzle 35 is smaller than the diameter of the shaping air nozzle 32. The shaping nozzle 32 and the air nozzle 35 serve as the rotation center 2 of the rotary shaft 23.
The air nozzle 35 is not located on the same line passing through 3a.
Are located between adjacent shaping nozzles 32.
【００１５】第１実施例においては、シェーピングエア
Ａ1 の噴射により霧化頭２４の前方に負圧領域４２が生
じるが、エアノズル３５からは負圧領域４２に向けてエ
アＡ 2 が吹き込まれるので、霧化頭２４の前方の圧力が
上昇し、負圧領域４２が縮小する。そのため、回転霧化
静電塗装装置２０と被塗装物４０との間の距離を短かく
設定しても、塗着パターンが図１０に示すドーナツ形状
にはならない。したがって、回転霧化静電塗装装置２０
をレシプロ（往復動）させても、図１１に示すような塗
装ムラは生ぜず、均一な膜厚分布が得られる。In the first embodiment, shaping air is used.
A1A negative pressure region 42 is generated in front of the atomizing head 24 by the injection of
However, from the air nozzle 35 toward the negative pressure region 42,
A 2Is blown in, the pressure in front of the atomizing head 24 is
As the pressure rises, the negative pressure region 42 contracts. Therefore, rotary atomization
Shorten the distance between the electrostatic coating device 20 and the object to be coated 40.
Even if it is set, the coating pattern will be the donut shape shown in Fig. 10.
It doesn't. Therefore, the rotary atomizing electrostatic coating device 20
Reciprocating (reciprocating) the coating as shown in Fig. 11.
A uniform film thickness distribution can be obtained without causing mounting unevenness.
【００１６】図７に示す従来の回転霧化静電塗装装置１
では、シェーピングエアノズル２のみが形成されている
ので、図１２に示すように、被塗装物５に塗着せず、ダ
スト状となって飛散した塗料粒子Ｔ4 がシェーピングノ
ズル２から噴射されるシェーピングエアＡ1 の隙間Ｓか
らエア層の内側に吸引されてしまう。そのため、霧化頭
３の裏面やシェーピングエアノズル２の周辺に塗料が付
着し、塗装不良が生じる。第１実施例のように、エアキ
ャップ３０に複数列のエアノズル３２、３５を設け、エ
アノズル３５を隣接するシェーピングエアノズル３２の
間に配置することにより、図３に示すように、霧化頭２
４の外周のほぼ全体にエアの流れの層を形成することが
できる。したがって、シェーピングエアノズル３２およ
びエアノズル３５からのエア噴射によるエア層の内側へ
のダスト状の塗料粒子Ｔ4 の巻き込みを防ぐことができ
る。本実施例では、シェーピングエアノズル３２の数と
エアノズル３５の数は同一、エアノズルの径はシェーピ
ングエアノズルの径より小としたが、適宜設定すること
ができる。A conventional rotary atomizing electrostatic coating apparatus 1 shown in FIG.
In this case, since only the shaping air nozzle 2 is formed, as shown in FIG. 12, paint particles T 4 which are not applied to the object to be coated 5 and are scattered in the form of dust are ejected from the shaping nozzle 2. The air is sucked inside the air layer from the gap S of A 1 . Therefore, the paint adheres to the back surface of the atomizing head 3 and the periphery of the shaping air nozzle 2, resulting in defective painting. As in the first embodiment, the air cap 30 is provided with a plurality of rows of air nozzles 32 and 35, and the air nozzles 35 are arranged between the adjacent shaping air nozzles 32, so that the atomizing head 2 can be formed as shown in FIG.
A layer of air flow can be formed on almost the entire outer circumference of 4. Therefore, it is possible to prevent the dust-like paint particles T 4 from being caught in the inside of the air layer due to the air injection from the shaping air nozzle 32 and the air nozzle 35. In this embodiment, the number of shaping air nozzles 32 and the number of air nozzles 35 are the same, and the diameter of the air nozzles is smaller than the diameter of the shaping air nozzles, but it can be set appropriately.
【００１７】つぎに、第２実施例に特有な構成、作用に
ついて説明する。図４に示すように、エアキャップ３０
には、エア通路３１の他にエア通路３６が形成されてい
る。エア通路３６は、周方向に延びておりエア通路３１
の内側に配置されている。第１実施例では、エア通路３
１からのエアがシェーピングエアノズル３２およびエア
ノズル３５に供給されていたが、第２実施例では、シェ
ーピングエアノズル３２がエア通路３１と接続され、エ
アノズル３５がエア通路３６と接続されている。エア通
路３１は、通路３７を介して圧力制御手段３９に接続さ
れている。エア通路３６は、通路３８を介して圧力制御
手段３９に接続されている。圧力制御手段３９は、電気
信号によりエア通路３１およびエア通路３６に供給する
エアの圧力を独立して調整する機能を有している。Next, the structure and operation peculiar to the second embodiment will be described. As shown in FIG. 4, the air cap 30
An air passage 36 is formed in addition to the air passage 31. The air passage 36 extends in the circumferential direction, and the air passage 31
Is located inside. In the first embodiment, the air passage 3
Although the air from No. 1 was supplied to the shaping air nozzle 32 and the air nozzle 35, in the second embodiment, the shaping air nozzle 32 is connected to the air passage 31 and the air nozzle 35 is connected to the air passage 36. The air passage 31 is connected to the pressure control means 39 via a passage 37. The air passage 36 is connected to the pressure control means 39 via a passage 38. The pressure control means 39 has a function of independently adjusting the pressure of the air supplied to the air passage 31 and the air passage 36 by an electric signal.
【００１８】第２実施例においては、圧力制御手段３９
によりシェーピングエアノズル３２から噴射されるシェ
ーピングエアＡ1 の圧力と、エアノズル３５から噴射さ
れるエアＡ2 の圧力を任意に制御できるので、塗料粒子
Ｔの被塗装物４０への衝突速度を最適なものとすること
ができ、また負圧領域４２の拡大、縮小も可能となる。In the second embodiment, the pressure control means 39
Since the pressure of the shaping air A 1 ejected from the shaping air nozzle 32 and the pressure of the air A 2 ejected from the air nozzle 35 can be arbitrarily controlled by the above, the collision speed of the paint particles T to the object to be coated 40 can be optimized. In addition, the negative pressure region 42 can be enlarged or reduced.
【００１９】つぎに、第３実施例に特有な構成、作用に
ついて説明する。図５および図６に示すように、第３実
施例では膜厚分布を均一化するためのエアノズル３５
が、シェーピングノズル３６と同じ円上に設けられてい
る。シェーピングエアノズル３２は、複数列の場合と同
様に噴霧パターン幅を広げるために回転軸２３に対して
３０〜４０度ねじれた方向に設定されている。エアノズ
ル３５は、回転軸２３に対して内向きとなっており、エ
アＡ2 の噴射方向は例えば回転軸２３の延長線上に設定
されている。Next, the structure and operation peculiar to the third embodiment will be described. As shown in FIGS. 5 and 6, in the third embodiment, an air nozzle 35 for uniformizing the film thickness distribution.
Are provided on the same circle as the shaping nozzle 36. The shaping air nozzle 32 is set in a direction twisted by 30 to 40 degrees with respect to the rotary shaft 23 in order to widen the spray pattern width, as in the case of a plurality of rows. The air nozzle 35 is directed inward with respect to the rotary shaft 23, and the injection direction of the air A 2 is set, for example, on an extension line of the rotary shaft 23.
【００２０】シェーピングノズル３２とエアノズル３５
を同一円上に配置した場合は、霧化頭２４から飛散する
塗料粒子を被塗装物に向けて加速する効果を高めるため
には、シェーピングノズル３２の数をエアノズル３５の
数よりも多くすることが望ましい。第３実施例では、シ
ェーピングノズル３２の数とエアノズル３５の数の比
は、２対１となっており、２つおきにエアノズル３５が
配置されている。ただし、エアノズルの数が少ないと、
パターン幅の微小化、塗着効率の低下を防ぐことができ
るが、負圧領域を小さくするという効果も低下するた
め、パターン幅を縮小させず、また塗着効率を低下させ
ない程度にそれぞれの数を設定することが好ましい。Shaping nozzle 32 and air nozzle 35
Are arranged on the same circle, the number of shaping nozzles 32 should be larger than the number of air nozzles 35 in order to enhance the effect of accelerating the paint particles scattered from the atomizing head 24 toward the object to be coated. Is desirable. In the third embodiment, the ratio of the number of shaping nozzles 32 to the number of air nozzles 35 is 2 to 1, and every other two air nozzles 35 are arranged. However, if the number of air nozzles is small,
Although it is possible to prevent the pattern width from becoming smaller and the coating efficiency from decreasing, the effect of reducing the negative pressure area also decreases, so the pattern width is not reduced and the coating efficiency is not reduced. Is preferably set.
【００２１】[0021]
【発明の効果】本発明に係る回転霧化静電装置によれ
ば、霧化頭の外側に、シェーピングエアの噴射により生
じる霧化頭前方の負圧領域に向けてエアを吹き込むエア
ノズルを設けたので、霧化頭の前方の圧力を上昇させる
ことができ、負圧領域を縮小することができる。したが
って、回転霧化静電塗装装置と被塗装物との距離を短か
く設定しても、塗着パターンがドーナツ形状となるのを
防止することができ、均一な膜厚分布を得ることができ
る。また、回転霧化静電塗装装置と被塗装物との間の距
離を短かくできることから、シェーピングエアの速度を
抑制することが可能となり、塗料粒子の拡散による塗着
効率の低下を解消することができる。According to the rotary atomizing electrostatic device of the present invention, an air nozzle for blowing air toward the negative pressure region in front of the atomizing head generated by the injection of shaping air is provided outside the atomizing head. Therefore, the pressure in front of the atomizing head can be increased, and the negative pressure area can be reduced. Therefore, even if the distance between the rotary atomizing electrostatic coating device and the object to be coated is set to be short, the coating pattern can be prevented from having a donut shape, and a uniform film thickness distribution can be obtained. . Further, since the distance between the rotary atomizing electrostatic coating device and the object to be coated can be shortened, the speed of shaping air can be suppressed, and the decrease in coating efficiency due to the diffusion of coating particles can be eliminated. You can
【図面の簡単な説明】[Brief description of drawings]
【図１】本発明の第１実施例に係る回転霧化静電塗装装
置の概略構成図である。FIG. 1 is a schematic configuration diagram of a rotary atomizing electrostatic coating apparatus according to a first embodiment of the present invention.
【図２】図１の装置の正面図である。2 is a front view of the device of FIG. 1. FIG.
【図３】図１の装置から噴射されるエアの流れ状態を示
す側面図である。3 is a side view showing a flow state of air jetted from the apparatus of FIG. 1. FIG.
【図４】本発明の第２実施例に係る回転霧化静電塗装装
置の概略構成図である。FIG. 4 is a schematic configuration diagram of a rotary atomizing electrostatic coating device according to a second embodiment of the present invention.
【図５】本発明の第３実施例に係る回転霧化静電塗装装
置の概略構成図である。FIG. 5 is a schematic configuration diagram of a rotary atomizing electrostatic coating device according to a third embodiment of the present invention.
【図６】図５の装置の正面図である。6 is a front view of the device of FIG.
【図７】従来の回転霧化静電塗装装置の正面図である。FIG. 7 is a front view of a conventional rotary atomizing electrostatic coating device.
【図８】図７の装置による静電塗装作業を示す側面図で
ある。FIG. 8 is a side view showing an electrostatic coating operation by the apparatus of FIG.
【図９】図８の位置Ｂ2 における塗着パターンの平面図
である。9 is a plan view of a coating pattern at position B 2 in FIG.
【図１０】図８の位置Ｂ1 における塗着パターンの平面
図である。10 is a plan view of a coating pattern at position B 1 in FIG.
【図１１】図１０の塗着パターンにより静電塗装を行っ
た場合の膜厚分布を示す断面図である。11 is a cross-sectional view showing a film thickness distribution when electrostatic coating is performed with the coating pattern of FIG.
【図１２】図７の装置から噴射されるエアの流れ状態を
示す側面図である。12 is a side view showing a flow state of air jetted from the device of FIG. 7. FIG.
２０ 回転霧化静電塗装装置 ２４ 霧化頭 ３２ シェーピングエアノズル ３５ エアノズル ４０ 被塗装物 ４２ 負圧領域 Ａ1 シェーピングエア Ａ2 エア Ｔ 塗料粒子20 Rotary Atomizing Electrostatic Coating Device 24 Atomizing Head 32 Shaping Air Nozzle 35 Air Nozzle 40 Painted Object 42 Negative Pressure Area A 1 Shaping Air A 2 Air T Paint Particles
Claims (1)
シェーピングエアを噴射させる回転霧化静電塗装装置に
おいて、前記霧化頭の外側に、前記シェーピングエアの
噴射により生じる霧化頭前方の負圧領域に向けてエアを
吹き込むエアノズルを設けたことを特徴とする回転霧化
静電塗装装置。1. A rotary atomizing electrostatic coating device for injecting shaping air toward paint particles emitted from an atomizing head, the front of the atomizing head generated by the injection of the shaping air on the outside of the atomizing head. The rotary atomizing electrostatic coating device is provided with an air nozzle that blows air toward the negative pressure region of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21555094A JP3248361B2 (en) | 1994-09-09 | 1994-09-09 | Rotary atomizing electrostatic coating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21555094A JP3248361B2 (en) | 1994-09-09 | 1994-09-09 | Rotary atomizing electrostatic coating equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0871455A true JPH0871455A (en) | 1996-03-19 |
| JP3248361B2 JP3248361B2 (en) | 2002-01-21 |
Family
ID=16674292
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21555094A Expired - Fee Related JP3248361B2 (en) | 1994-09-09 | 1994-09-09 | Rotary atomizing electrostatic coating equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3248361B2 (en) |
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| WO2008095657A1 (en) * | 2007-02-09 | 2008-08-14 | Dürr Systems GmbH | Deflecting air ring and corresponding coating process |
| JP2010036091A (en) * | 2008-08-04 | 2010-02-18 | Asahi Sunac Corp | Rotary spray coater, and coating method using the same |
| JP2010528854A (en) * | 2007-06-13 | 2010-08-26 | サム テクノロジーズ | Rotating sprayer for spraying coating material and apparatus comprising the sprayer |
| WO2010130955A1 (en) | 2009-05-13 | 2010-11-18 | Sames Technologies | Projector and member for spraying a coating material, and spraying method using such a sprayer |
| JP2012232247A (en) * | 2011-04-28 | 2012-11-29 | Honda Motor Co Ltd | Rotary atomizing coating device |
| JP2013184102A (en) * | 2012-03-07 | 2013-09-19 | Honda Motor Co Ltd | Electrostatic coating apparatus and electrostatic coating method |
| JP2013188651A (en) * | 2012-03-12 | 2013-09-26 | Ransburg Industry Kk | Rotary atomization type electrostatic coating machine and head member therefor |
| WO2013153205A1 (en) | 2012-04-13 | 2013-10-17 | Sames Technologies | Rotating projector and method for spraying a coating product |
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-
1994
- 1994-09-09 JP JP21555094A patent/JP3248361B2/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8481124B2 (en) | 2007-02-09 | 2013-07-09 | Durr Systems Gmbh | Deflecting air ring and corresponding coating process |
| US20100021646A1 (en) * | 2007-02-09 | 2010-01-28 | Dürr Systems GmbH | Deflecting air ring and corresponding coating process |
| EP2121197B1 (en) | 2007-02-09 | 2016-09-14 | Dürr Systems GmbH | Deflecting air ring and corresponding coating process |
| WO2008095657A1 (en) * | 2007-02-09 | 2008-08-14 | Dürr Systems GmbH | Deflecting air ring and corresponding coating process |
| US8642131B2 (en) | 2007-02-09 | 2014-02-04 | Durr Systems Gmbh | Deflecting air ring and corresponding coating process |
| JP2010528854A (en) * | 2007-06-13 | 2010-08-26 | サム テクノロジーズ | Rotating sprayer for spraying coating material and apparatus comprising the sprayer |
| JP2014133232A (en) * | 2007-06-13 | 2014-07-24 | Sames Technologies | Rotary sprayer for spraying coating material and device having the same |
| US9314806B2 (en) | 2007-06-13 | 2016-04-19 | Sames Technologies | Rotary sprayer for spraying a coating material, and an installation including such a sprayer |
| JP2010036091A (en) * | 2008-08-04 | 2010-02-18 | Asahi Sunac Corp | Rotary spray coater, and coating method using the same |
| DE202009019107U1 (en) | 2008-09-30 | 2016-07-17 | Sames Technologies | Rotary injection device for a coating product |
| WO2010130955A1 (en) | 2009-05-13 | 2010-11-18 | Sames Technologies | Projector and member for spraying a coating material, and spraying method using such a sprayer |
| JP2012232247A (en) * | 2011-04-28 | 2012-11-29 | Honda Motor Co Ltd | Rotary atomizing coating device |
| JP2013184102A (en) * | 2012-03-07 | 2013-09-19 | Honda Motor Co Ltd | Electrostatic coating apparatus and electrostatic coating method |
| JP2013188651A (en) * | 2012-03-12 | 2013-09-26 | Ransburg Industry Kk | Rotary atomization type electrostatic coating machine and head member therefor |
| WO2013153205A1 (en) | 2012-04-13 | 2013-10-17 | Sames Technologies | Rotating projector and method for spraying a coating product |
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