JP3436808B2 - Electrostatic coating machine - Google Patents
Electrostatic coating machineInfo
- Publication number
- JP3436808B2 JP3436808B2 JP29754194A JP29754194A JP3436808B2 JP 3436808 B2 JP3436808 B2 JP 3436808B2 JP 29754194 A JP29754194 A JP 29754194A JP 29754194 A JP29754194 A JP 29754194A JP 3436808 B2 JP3436808 B2 JP 3436808B2
- Authority
- JP
- Japan
- Prior art keywords
- paint
- atomizing head
- chamber
- coating machine
- lid
- 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 - Fee Related
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
- 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
- B05B3/1064—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 the liquid or other fluent material to be sprayed being axially supplied to the rotating member through a hollow rotating shaft
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、エアモータの管状回転
軸の先端開口部からその先端に取り付けられた回転霧化
頭内に塗料及び洗浄液が択一的に供給されるセンターフ
ィードタイプの静電塗装機に関する。
【０００２】
【従来の技術】センターフィードタイプの静電塗装機
は、エアモータの管状回転軸内に挿通された塗料パイプ
から、当該回転軸に取り付け付けられた回転霧化頭の塗
料室内に塗料が供給され、回転霧化頭を所定回転数で回
転させることにより前記塗料室の周縁に形成された塗料
吐出口から、その外側へ吐出され、回転霧化頭の正面端
縁から霧化されて被塗物に塗着される。
【０００３】そして、多色塗装を行なう場合において、
前色塗料から次色塗料へ色替えするときは、塗料パイプ
を介して回転霧化頭内に洗浄液と洗浄エアを交互に供給
することにより、塗料パイプ及び塗料室内に残存し付着
している前色塗料を洗浄除去して、前色塗料と次色塗料
の色混じりを防止している。
【０００４】
【発明が解決しようとする課題】しかしながら、塗料室
の周縁は隅に角部が形成されているので塗料が溜まりや
すく、塗料室内に溶剤を勢い良く噴射しても、きれいに
洗浄するためには時問がかかり、また、洗浄溶剤を大量
に使用しなければならないという間題があった。特に、
最近では搬送されてくる被塗物間の搬送間隔が狭く、洗
浄時間を短縮することが要請されているので、その限ら
れた洗浄時間では塗料残りを生じてしまう。そこで、本
発明は、塗料室周縁の隅に形成された角部に溜まる塗料
をとれやすくして、洗浄時に使用する洗浄溶剤を節約し
ランニングコストを軽減すると共に、洗浄時間を短縮し
て作業効率を向上させることを技術的課題としている。
【０００５】
【課題を解決するための手段】この課題を解決するため
に、本発明は、エアモータの管状回転軸内に挿通された
塗料パイプから当該回転軸の先端に取り付けられた回転
霧化頭内に塗料が供給されるセンターフィードタイプの
静電塗装機において、前記回転霧化頭が、前記管状回転
軸を取り付ける取付孔を中心として正面側に開口する凹
部を形成した霧化頭本体と、その正面側に嵌め付けられ
る蓋体とから成り、蓋体の背面には、前記霧化頭本体の
凹部内周面と径が等しく、その隅部をアール状に形成し
た凹部が形成されると共に、該隅部に、回転霧化頭の先
端に向って塗料室内の塗料を送り出す塗料吐出口が開口
形成されたことを特徴とする。
【０００６】本発明によれば、蓋体の背面に、霧化頭本
体の凹部内周面と径が等しく、その隅部をアール状に形
成した凹部が形成されているので、塗料室の周縁部には
鋭角状の角部が形成されない。したがって、塗料が溜ま
り難く、塗料室内面に付着した塗料も簡単に洗浄除去で
きる。また、塗料吐出口が塗料室１２内の周縁部にその
中心を向いて開口されることになるので、塗料室内に供
給された塗料が塗料吐出口に入りやすく、より均一に噴
霧されるというメリットもある。
【０００７】
【発明の実施の形態】以下、本発明を図面に示す実施例
に基づいて具休的に説明する。図１は本発明に係る静電
塗装機の一例を示す断面図、図２はそのＡ−Ａ線断面図
である。
【０００８】図中１は、エアモータ２の管状回転軸３内
に挿通された塗料パイプ５から当該回転軸３の先端に取
り付けられた回転霧化頭４内に各色塗料，洗浄液及び洗
浄エアが択一的に供給されるセンターフィードタイプの
静電塗装機であって、前記塗料パイプ５に色替装置６が
塗料ホース７を介して接続されており、当該色替装置６
から各色塗料，洗浄液及び洗浄エアが前記塗料パィプ５
を介して回転霧化頭４内に択一的に供給されるようにな
されている。
【０００９】回転霧化頭４は、前記管状回転軸３に取り
付けるための取付孔８を中心として正面側に開口する凹
部９を形成した霧化頭本体１０に蓋体１１が嵌め付けら
れて、霧化頭本体１０の凹部９と蓋体１１とで前記管状
回転軸３の先端開口部に連通される塗料室１２が形成さ
れている。
【００１０】また、蓋体１１の背面１１ａには、前記霧
化頭本体１０の凹部内周面９ａと径が等しく、隅部１４
ａをアール状に形成した凹部１４が形成されており、そ
の隅部１４ａに、回転霧化頭４の先端４ａに向って塗料
室１２内の塗料を送り出す塗料吐出口１３が所定間隔で
開口形成されている。
【００１１】したがって、塗料パイプ５から塗料室１２
内に供給された塗料に、回転霧化頭４の回転により生ず
る遠心力が作用すると、塗料は塗料室１２の周縁に形成
された塗料吐出口１３から外側に押し出され、回転霧化
頭４の先端４ａで霧化されて噴霧されるように成されて
いる。
【００１２】この場合、塗料吐出口１３は、塗料室１２
内の周壁部にその中心を向いて開口されることとなるの
で、塗料室１２内の塗料に遠心力が作用すると塗料が塗
料吐出口１３内に入りやすく、より均一に噴霧される。
また、塗料室１２の周縁部には鋭角状の角部が形成され
ないので、塗料が溜まりにくく、付着した塗料も簡単に
洗浄除去することができる。
【００１３】なお、前記霧化頭本体１０の凹部内周面９
ａと、蓋休１１の背面１１ａはフッ素樹脂でコーティン
グされているので、霧化頭本体１０に蓋体１１を嵌め付
けて形成される塗料室１２はその内周面全面がフッ素樹
脂でコーティングされることとなる。
【００１４】以上が本発明の一例構成であって、次にそ
の作用を説明する。ます、塗装を行なうときは、エアモ
ータ２を起動して回転霧化頭４を所定回転数で回転させ
た状態で色替装置６から所望の色の塗料を供給すると、
その塗料は塗料パイプ５から塗料室１２内に供給され、
塗料室１２の周縁に形成された塗料吐出口１３から外側
に押し出されて、回転霧化頭４の先端４ａで霧化されて
噴霧され被塗物に塗着する。
【００１５】ここで、各塗料吐出口１３…は、塗料室１
２の中心を向いてその周壁部に開口されることとなるの
で、塗料室１２内の塗料に遠心力が作用すると塗料が塗
料吐出口１３内に入りやすく、より均一に噴霧される。
【００１６】次いで、塗装が終了して塗料室１２内を洗
浄するときは、色替装置６から高圧の洗浄工ア及ぴ洗浄
液を交互に供給すると、洗浄エア及び洗浄液は塗料ホー
ス７及び塗料パイプ５を介して回転霧化頭４の塗料室１
２内に勢い良く注入され、洗浄工アで塗料室１２内に残
存する塗料が塗料吐出口１３から吹き出すと共に、塗料
室１２の内周面に付着した塗料が洗浄液で洗い流され
る。
【００１７】この場合に、蓋体１１の背面１１ａには、
霧化頭本体１０の凹部内周面９ａと径が等しく、隅部１
４ａをアール状に形成した凹部１４が形成されており、
塗料室１２の周縁部には鋭角状の角部が形成されていな
いので、塗料が溜まりにくく、付着した塗料も簡単に洗
浄除去することができる。
【００１８】また、塗料室１２の内周面を形成する霧化
頭本体１０の凹部内周面９ａと蓋体１１の背面１１ａは
フッ素樹脂でコーティングされているので、その内周面
に塗料が付着しにくく、付着しても簡単に洗浄除去する
ことができ、洗浄時間が短縮されると共に、洗浄液の使
用量を軽減できる。
【００１９】なお、蓋体１１の背面１１ａの中央部に塗
料パイプ５の先端に向かって突出した円錐状の尖頭１１
ｂを形成しておけば、塗料パイプ５から塗料内に送給さ
れた塗料がその斜面を伝って流れ、回転霧化頭４の回転
による遠心力により均一に周囲に拡散される。
【００２０】また、１１ｃは洗浄時に回転霧化頭４の正
面に洗浄液を供給するための透孔であって、遠心力が作
用する方向と逆向きに傾斜して形成されている。したが
って、回転霧化頭４が高速回転され、且つ、塗料の供給
量も少ない塗装時は塗料の漏洩が防止され、回転霧化頭
４が定速回転され、且つ、洗浄液供給量の多い洗浄時に
は洗浄液が滲み出される。
【００２１】なお、塗料吐出口１３を蓋体１１に穿設す
る場合について説明したが、本発明はこれに限らず、蓋
体１１の外周面に凹溝を形成する場合や、霧化頭本体１
０の内周面に凹溝を形成する場合であってもよい。
【００２２】
【発明の効果】以上述べたように、本発明によれば、蓋
体の背面には、前記霧化頭本体の凹部内周面と径が等し
く、その隅部をアール状に形成した凹部が形成されてお
り、塗料室の周縁部には鋭角状の角部が形成されないの
で、塗料室内に塗料が溜まりにくく、内周面に付着した
塗料も簡単に洗浄除去することができるという大変優れ
た効果を奏する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method in which a paint and a cleaning liquid are selectively supplied from an opening of a tip end of a tubular rotary shaft of an air motor into a rotary atomizing head attached to the tip end. The present invention relates to a center feed type electrostatic coating machine supplied to a company. 2. Description of the Related Art In a center feed type electrostatic coating machine, a paint is inserted into a paint chamber of a rotary atomizing head attached to the rotary shaft from a paint pipe inserted into a tubular rotary shaft of an air motor. The rotary atomizing head is supplied and rotated at a predetermined number of revolutions, is discharged to the outside from a paint discharge port formed at the periphery of the paint chamber, is atomized from the front edge of the rotary atomizing head, and is coated. It is applied to the paint. [0003] When performing multi-color coating,
When changing the color from the previous color paint to the next color paint, the cleaning liquid and the cleaning air are alternately supplied into the rotary atomizing head through the paint pipe, so that the paint remaining in the paint pipe and paint chamber remains The color paint is washed away to prevent the color mixture of the previous color paint and the next color paint. [0004] However, since the periphery of the paint chamber has corners formed at the corners, the paint tends to accumulate, and even if the solvent is squirted into the paint chamber vigorously, it is cleaned thoroughly. Is time consuming and has the problem that a large amount of cleaning solvent must be used. In particular,
In recent years, the conveyance interval between conveyed articles to be conveyed is narrow, and it is required to reduce the cleaning time. Therefore, the limited cleaning time results in residual paint. Therefore, the present invention makes it easier to remove the paint remaining in the corners formed at the corners of the paint chamber periphery, saves the washing solvent used during washing, reduces running costs, and shortens the washing time to improve work efficiency. It is a technical task to improve [0005] In order to solve this problem, the present invention provides a rotary atomizing head attached to the tip of a rotary shaft from a paint pipe inserted into a tubular rotary shaft of an air motor. In a center feed type electrostatic coating machine in which paint is supplied, the rotary atomizing head has an atomizing head body formed with a concave portion that opens to the front side around a mounting hole for attaching the tubular rotary shaft, A lid fitted on the front side thereof, and on the back of the lid, a concave portion having the same diameter as the inner peripheral surface of the concave portion of the atomizing head main body and having a rounded corner is formed. In the corner portion, a paint discharge port for feeding paint in the paint chamber toward the tip of the rotary atomizing head is formed to be open. According to the present invention, since the concave portion having the same diameter as the inner peripheral surface of the concave portion of the atomizing head body and the corner portion formed in a round shape is formed on the back surface of the lid, the peripheral edge of the paint chamber is formed. No sharp corners are formed in the portion. Therefore, the paint does not easily accumulate, and the paint adhering to the interior of the paint chamber can be easily washed and removed. In addition, since the paint discharge port is opened toward the center in the peripheral portion in the paint chamber 12, the paint supplied into the paint chamber easily enters the paint discharge port and is more uniformly sprayed. There is also. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention; FIG. 1 is a sectional view showing an example of an electrostatic coating machine according to the present invention, and FIG. 2 is a sectional view taken along line AA of FIG. In FIG. 1, each color paint, cleaning liquid and cleaning air are selected from a paint pipe 5 inserted into a tubular rotary shaft 3 of an air motor 2 into a rotary atomizing head 4 attached to the tip of the rotary shaft 3. This is a center feed type electrostatic coating machine that is supplied in a unified manner, wherein a color change device 6 is connected to the paint pipe 5 via a paint hose 7.
From each paint, cleaning liquid and cleaning air
Through the rotary atomizing head 4. The rotary atomizing head 4 has a lid 11 fitted to an atomizing head body 10 having a recess 9 which is open to the front side with respect to a mounting hole 8 for mounting on the tubular rotary shaft 3. The recess 9 of the atomizing head body 10 and the lid 11 form a paint chamber 12 that communicates with the opening at the tip of the tubular rotary shaft 3. The rear surface 11a of the lid 11 has the same diameter as the inner peripheral surface 9a of the concave portion of
a is formed in a round shape, and a paint discharge port 13 for feeding paint in the paint chamber 12 toward the tip 4a of the rotary atomizing head 4 is formed at a predetermined interval in a corner 14a. Have been. Therefore, the paint pipe 12 is moved from the paint pipe 5 to the paint chamber 12.
When the centrifugal force generated by the rotation of the rotary atomizing head 4 acts on the paint supplied to the inside, the paint is pushed outward from a paint discharge port 13 formed on the peripheral edge of the coating chamber 12 and the rotary atomizing head 4 It is configured to be atomized and sprayed at the tip 4a. In this case, the paint outlet 13 is connected to the paint chamber 12.
The paint is opened toward the center of the inner peripheral wall, so that when a centrifugal force acts on the paint in the paint chamber 12, the paint easily enters the paint discharge port 13 and is sprayed more uniformly.
Further, since no sharp corners are formed at the peripheral edge of the paint chamber 12, paint is less likely to accumulate, and attached paint can be easily washed and removed. The inner peripheral surface 9 of the recess of the atomizing head body 10
a and the back surface 11a of the lid rest 11 are coated with a fluororesin, so that the paint chamber 12 formed by fitting the lid body 11 to the atomizing head body 10 is entirely coated with the fluororesin. The Rukoto. The above is an example of the configuration of the present invention, and its operation will be described below. First, when performing painting, when the air motor 2 is activated and the rotary atomizing head 4 is rotated at a predetermined number of revolutions, a desired color paint is supplied from the color changing device 6.
The paint is supplied from the paint pipe 5 into the paint chamber 12,
It is extruded outward from a paint discharge port 13 formed in the periphery of the paint chamber 12, atomized and sprayed at the tip 4 a of the rotary atomizing head 4, and is applied to a workpiece. Here, each of the paint discharge ports 13...
The paint is easily opened into the paint discharge port 13 when centrifugal force acts on the paint in the paint chamber 12 because the paint is directed to the center of the paint chamber 2 and is opened at the peripheral wall. Next, when the interior of the paint chamber 12 is washed after the coating is completed, a high-pressure washing unit and a washing liquid are alternately supplied from the color changing device 6, and the washing air and the washing liquid are supplied to the paint hose 7 and the paint pipe. 5, a rotary atomizing head 4 via a paint chamber 1
2, the paint remaining in the paint chamber 12 is blown out from the paint discharge port 13 by the cleaning process, and the paint adhered to the inner peripheral surface of the paint chamber 12 is washed away with the cleaning liquid. In this case, on the back surface 11a of the lid 11,
The diameter of the inner peripheral surface 9a of the atomization head main body 10 is equal to that of the
4a is formed into a concave portion 14 formed in a round shape,
Since no sharp corners are formed at the peripheral edge of the paint chamber 12, paint is less likely to accumulate and the attached paint can be easily removed by washing. The inner peripheral surface 9a of the atomizing head body 10 forming the inner peripheral surface of the paint chamber 12 and the rear surface 11a of the lid 11 are coated with a fluororesin, so that the inner peripheral surface is coated with paint. It is difficult to adhere, and even if it adheres, it can be easily washed and removed, so that the washing time is shortened and the amount of the washing liquid used can be reduced. A conical point 11 protruding toward the tip of the paint pipe 5 is provided at the center of the back surface 11a of the lid 11.
If b is formed, the paint fed from the paint pipe 5 into the paint flows along the slope, and is uniformly diffused around by the centrifugal force generated by the rotation of the rotary atomizing head 4. Reference numeral 11c denotes a through hole for supplying a cleaning liquid to the front of the rotary atomizing head 4 at the time of cleaning, and is formed to be inclined in a direction opposite to the direction in which centrifugal force acts. Therefore, when the rotary atomizing head 4 is rotated at a high speed and the coating amount of the paint is small, the leakage of the paint is prevented. When the rotary atomizing head 4 is rotated at a constant speed and the washing liquid is supplied at a large amount, the cleaning is performed. The cleaning liquid oozes out. Although the case where the paint discharge port 13 is formed in the cover 11 has been described, the present invention is not limited to this, and the case where a concave groove is formed on the outer peripheral surface of the cover 11 or the atomization head main body is used. 1
The groove may be formed on the inner peripheral surface of the zero. As described above, according to the present invention, on the back surface of the lid, the diameter is equal to the inner circumferential surface of the recess of the atomizing head main body, and the corner is formed in a round shape. A concave portion is formed, and no sharp corners are formed at the periphery of the paint chamber. Therefore, the paint does not easily accumulate in the paint chamber, and the paint adhered to the inner peripheral surface can be easily washed and removed. It has a very good effect.
【図面の簡単な説明】 【図１】本発明に係る静電塗装機を示す断面図。 【図２】そのＡ一Ａ線断面図。 【符号の説明】 １………静電塗装機 ２………工アモータ ３………管状回転軸 ４………回転霧化頭 ８………取付孔 ９………凹部 ９ａ……凹部内周面 １０………霧化頭本体 １１………蓋体 １１ａ……背面 １２………塗料室 １３………塗料吐出口 １４………凹部 １４ａ……隅部[Brief description of the drawings] FIG. 1 is a sectional view showing an electrostatic coating machine according to the present invention. FIG. 2 is a sectional view taken along the line A-A. [Explanation of symbols] 1 ... Electrostatic coating machine 2 ……… a motor 3 ... Tube rotary shaft 4 Rotating atomizing head 8 Mounting hole 9 ... recess 9a ... inner peripheral surface of concave portion 10 Atomizing head body 11 Lid 11a ... Back 12 ... Paint room 13 Paint outlet 14 ... recess 14a ... corner
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平４−22452（ＪＰ，Ａ) 特開 昭62−216664（ＪＰ，Ａ) 実開 昭54−10970（ＪＰ，Ｕ) 実開 昭63−16855（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.7，ＤＢ名) B05B 5/00 - 5/16 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-22452 (JP, A) JP-A-62-216664 (JP, A) Fully open 1979-1970 (JP, U) Really open 1988 16855 (JP, U) (58) Field surveyed (Int. Cl. 7 , DB name) B05B 5/00-5/16
Claims (1)
挿通された塗料パイプ（５）から当該回転軸（３）の先
端に取り付けられた回転霧化頭（４）内に塗料が供給さ
れるセンターフィードタイプの静電塗装機において、 前記回転霧化頭（４）が、前記管状回転軸（３）を取り
付ける取付孔（８）を中心として正面側に開口する凹部
（９）を形成した霧化頭本体（１０）と、その正面側に
嵌め付けられる蓋体（１１）とから成り、蓋体（１１）の背面（１１ａ）には、前記霧化頭本体
（１０）の凹部内周面（９）と径が等しく、その隅部
（１４ａ）をアール状に形成した凹部（１４）が形成さ
れると共に、該隅部（１４ａ）に、回転霧化頭（４）の
先端（４ａ）に向って塗料室（１２）内の塗料を送り出
す塗料吐出口（１３）が開口形成された ことを特徴とす
る静電塗装機。(57) Claims: 1. A rotary fog attached to a tip of a rotary shaft (3) from a paint pipe (5) inserted into a tubular rotary shaft (3) of an air motor (2). In a center-feed type electrostatic coating machine in which paint is supplied into the head (4), the rotary atomizing head (4) is frontally mounted around a mounting hole (8) for mounting the tubular rotary shaft (3). It consists of an atomizing head body (10) having a recess (9) opening to the side and a lid (11) fitted on the front side thereof, and the rear surface (11a) of the lid (11) has Atomization head body
The diameter is equal to the inner peripheral surface (9) of the concave portion (10), and the corner thereof
A concave portion (14) in which (14a) is formed in a round shape is formed.
And at the corner (14a), a rotary atomizing head (4)
Dispense paint in paint chamber (12) toward tip (4a)
An electrostatic coating machine characterized in that a paint discharge port (13) is formed in an opening .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29754194A JP3436808B2 (en) | 1994-11-30 | 1994-11-30 | Electrostatic coating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29754194A JP3436808B2 (en) | 1994-11-30 | 1994-11-30 | Electrostatic coating machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08155348A JPH08155348A (en) | 1996-06-18 |
| JP3436808B2 true JP3436808B2 (en) | 2003-08-18 |
Family
ID=17847879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29754194A Expired - Fee Related JP3436808B2 (en) | 1994-11-30 | 1994-11-30 | Electrostatic coating machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3436808B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6328224B1 (en) * | 1997-02-05 | 2001-12-11 | Illinois Tool Works Inc. | Replaceable liner for powder coating apparatus |
| 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 |
-
1994
- 1994-11-30 JP JP29754194A patent/JP3436808B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08155348A (en) | 1996-06-18 |
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