JP4274894B2 - Rotary atomizing head - Google Patents
Rotary atomizing head Download PDFInfo
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- JP4274894B2 JP4274894B2 JP2003357925A JP2003357925A JP4274894B2 JP 4274894 B2 JP4274894 B2 JP 4274894B2 JP 2003357925 A JP2003357925 A JP 2003357925A JP 2003357925 A JP2003357925 A JP 2003357925A JP 4274894 B2 JP4274894 B2 JP 4274894B2
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- JP
- Japan
- Prior art keywords
- paint
- inner member
- rotary atomizing
- atomizing head
- outer member
- Prior art date
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- 239000003973 paint Substances 0.000 claims description 42
- 239000011248 coating agent Substances 0.000 claims description 34
- 238000000576 coating method Methods 0.000 claims description 34
- 239000000463 material Substances 0.000 claims description 8
- 238000003780 insertion Methods 0.000 claims description 6
- 230000037431 insertion Effects 0.000 claims description 6
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000001055 chewing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 239000002932 luster Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Nozzles (AREA)
- Electrostatic Spraying Apparatus (AREA)
Description
本発明は、自動車のボディなどに塗装を行う塗装機に適用される回転霧化ヘッド（ベルカップ）に関する。 The present invention relates to a rotary atomizing head (bell cup) that is applied to a coating machine that performs coating on the body of an automobile.
回転霧化ヘッドは高速回転する塗装機の本体に取り付けられ、塗装機本体から供給される塗料を回転に伴う遠心力で霧化し自動車のボディなどに付着せしめる。この回転霧化ヘッドとしては、特許文献１に開示される構造が知られている。 The rotary atomizing head is attached to the main body of a coating machine that rotates at high speed, and the paint supplied from the main body of the coating machine is atomized by centrifugal force accompanying rotation to adhere to the body of an automobile. As this rotary atomizing head, the structure disclosed in Patent Document 1 is known.
図３及び図４は特許文献１に開示される回転霧化ヘッドを示す。図３に示す従来の回転霧化ヘッドは、カップ状をなすヘッド本体１０の内周部にリング溝１１を形成し、このリング溝１１に弾性リング１２を介してハブ部材１３を着脱可能に取り付け、塗装機の本体から供給された塗料を遠心力によってハブ部材１３に形成した塗料流出孔１４からヘッド本体１０の前面に形成した塗料を薄膜化する沿面１５に送り出し、沿面１５の外周端から塗料を霧化して被塗装面に向けて噴出する。 3 and 4 show a rotary atomizing head disclosed in Patent Document 1. FIG. The conventional rotary atomizing head shown in FIG. 3 has a ring groove 11 formed in the inner periphery of a cup-shaped head body 10, and a hub member 13 is detachably attached to the ring groove 11 via an elastic ring 12. The coating material supplied from the main body of the coating machine is sent to the creeping surface 15 where the coating material formed on the front surface of the head body 10 is thinned from the coating material outflow hole 14 formed in the hub member 13 by centrifugal force. Is atomized and spouted toward the surface to be painted.
図４に示す従来の回転霧化ヘッドは、ハブ部材１３の前面に塗料流出孔１４を形成し、ヘッド本体１０の内周面にハブ部材１３が隙間なく嵌合する構成となっている。 The conventional rotary atomizing head shown in FIG. 4 is configured such that a paint outflow hole 14 is formed on the front surface of the hub member 13 and the hub member 13 is fitted to the inner peripheral surface of the head body 10 without a gap.
また、特許文献２には回転霧化ヘッドを外側部分、内側部分及びディフューザの３つの部材から構成することが開示されている。即ち、外側部分とディフューザとの間に内側部分を挟み込んで固定し、外側部分には機械的強度が高い材料を用い、塗料と接触する内側部材には塗料の移動に対する不活性の度合いが比較的高い材料を用いることが提案されている。
図３及び図４に示した従来の回転霧化ヘッドは、ハブ部材１３が着脱可能なため、色替えやメンテナンスの際にハブ部材１３内側面の清掃が簡単に行える。しかしながら、再度ハブ部材を装着した時にハブ部の芯ずれが生じやすい。ハブ部の芯ずれが生じると、回転がアンバランスになり塗料の微粒化が促進されず塗装パターンにムラが発生し、塗装品質、特に塗膜の平滑性を著しく低下させる。 In the conventional rotary atomizing head shown in FIGS. 3 and 4, since the hub member 13 is detachable, the inner surface of the hub member 13 can be easily cleaned during color change or maintenance. However, misalignment of the hub portion tends to occur when the hub member is mounted again. When the hub part is misaligned, the rotation becomes unbalanced and the atomization of the paint is not promoted, and the coating pattern becomes uneven, and the coating quality, particularly the smoothness of the coating film, is remarkably lowered.
また、高精度にヘッド本体１０とハブ部材１３を製作しても、図３の拡大部分に示すように、塗料流出孔１４と沿面１５との間に隙間や段差が生じてしまう。同様に図４に示した回転霧化ヘッドにあってもヘッド本体１０の内周面とハブ部材１３との間に隙間や段差が生じやすい。これら隙間や段差は小さくてもエア噛みの原因となり、塗料中に気泡が混入することになる。また隙間や段差に塗料が固形物となって残ることもあり、このような状態で塗装を行うと残存していた塗料滓の塊が剥がれ、流動する塗料中に混入することで塗膜の品質低下を来たす。 Even if the head body 10 and the hub member 13 are manufactured with high accuracy, a gap or a step is generated between the paint outflow hole 14 and the creeping surface 15 as shown in the enlarged portion of FIG. Similarly, even in the rotary atomizing head shown in FIG. 4, a gap or a step is likely to occur between the inner peripheral surface of the head body 10 and the hub member 13. Even if these gaps and steps are small, air will be caught, and bubbles will be mixed in the paint. In addition, the paint may remain as solid matter in the gaps and steps, and if coating is performed in such a state, the lump of the remaining paint cake will be peeled off and mixed into the flowing paint, resulting in coating film quality. It will drop.
更に、特許文献２に開示される回転霧化ヘッドにあっては、ディフュ−ザにネジを挿通するための柱部を形成しており、塗料を薄膜化する際に前記柱部を回り込むことになるため、安定した霧化の妨げになる。 Furthermore, in the rotary atomizing head disclosed in Patent Document 2, a pillar part for inserting a screw into the diffuser is formed, and the pillar part goes around when thinning the paint. Therefore, it will hinder stable atomization.
上記課題を解決するため本発明に係る回転霧化ヘッドは、塗装機本体に取り付けられるインナー部材と、このインナー部材に着脱自在とされるアウター部材とからなり、前記アウター部材の前面には塗料吐出穴が形成され、この塗料吐出穴よりも径方向外側のアウター部材前面を塗料を薄膜化する塗料吐出沿面とし、また前記アウター部材の背面側に前記インナー部材が嵌合する凹部が形成され、この凹部の前半部分はインナー部材の先部に合わせた雌テーパ部とされ後半部分は雌ネジ部とされ、また前記インナー部材の外周部には前記雌ネジ部と螺合する雄ネジ部が形成され、更にこのインナー部材の背面側には塗装機本体への挿着凹部が形成され、この挿着凹部には塗装機本体の芯合わせを行うための雌テーパ部と一体的回転するための係合部が形成された構成とした。
In order to solve the above-mentioned problems, a rotary atomizing head according to the present invention comprises an inner member attached to a main body of a coating machine and an outer member that is detachably attached to the inner member. A hole is formed, and the outer member front surface radially outside the paint discharge hole is used as a paint discharge creeping surface for thinning the paint, and a recess is formed on the back side of the outer member to which the inner member is fitted. The front half of the recess is a female taper that matches the tip of the inner member, the rear half is a female thread, and the outer periphery of the inner member is formed with a male thread that engages with the female thread. Further, an insertion recess for the coating machine main body is formed on the back side of the inner member, and the insertion recess for rotating integrally with the female taper portion for centering the coating machine main body. And a configuration in which engagement portion is formed.
アウター部材の前面を連続した面とすることで、段差や隙間が塗料吐出沿面に形成されることがなくなる。その結果、エア噛みや滓が残るなどの問題が解消される。 By making the front surface of the outer member a continuous surface, steps and gaps are not formed on the paint discharge surface. As a result, problems such as air bites and wrinkles remaining are solved.
また、前記インナー部材とアウター部材とを異なる材料してもよい。例えばインナー部材をステンレス製（焼入れ品）とし、アウター部材をアルミニウム製とすることで、機械的強度と加工性の両方を満足することができる。 The inner member and the outer member may be made of different materials. For example, when the inner member is made of stainless steel (hardened product) and the outer member is made of aluminum, both mechanical strength and workability can be satisfied.
本発明によれば、塗料流動面に段差や溝がないため、気泡の発生による泡噛み、塗料の乱流に起因する塗装パターンのバラツキによる塗膜の平滑性の低下、塗料滓が段差や溝に溜まることによるピンホールなどの発生が防止できる。またメタリック塗装の場合には、アルミフレークが整列した状態で塗布されるため光輝性に優れた塗膜が得られるなどの塗装品質の向上を図りながら確実に回転霧化ヘッドを洗浄し、塗料残りを発生させない効果を有する。 According to the present invention, since there is no step or groove on the paint flow surface, foam biting due to generation of bubbles, deterioration of the smoothness of the coating film due to coating pattern variation caused by paint turbulence, It is possible to prevent the occurrence of pinholes and the like due to accumulation on the surface. Also, in the case of metallic coating, the rotary atomization head is reliably washed while improving the coating quality, such as obtaining a coating film with excellent luster because the aluminum flakes are applied in an aligned state. It has the effect of not generating.
また、従来にあってはハブを着脱自在としていたため、清掃後に挿着したときに軸ずれが生じ、塗装パターンが不均一になることがあったが、本発明によれば、軸ずれが起こることがないので回転バランスが安定し、均一な塗装パターンを継続することができる。 In addition, since the hub has been detachable in the past, the shaft may be misaligned when inserted after cleaning, and the coating pattern may become uneven. However, according to the present invention, the shaft misalignment occurs. Therefore, the rotation balance is stable and a uniform coating pattern can be continued.
以下に本発明の実施の形態を添付図面に基づいて説明する。図１は本発明に係る回転霧化ヘッドの断面図、図２は同回転霧化ヘッドの分解図である。 Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a sectional view of a rotary atomizing head according to the present invention, and FIG. 2 is an exploded view of the rotary atomizing head.
回転霧化ヘッドは塗装機本体Ｔに取り付けられるステンレス製インナー部材１と、このインナー部材１が着脱自在とされるカップ状のアルミニウム製アウター部材２とからなり、インナー部材１とアウター部材２とを結合した状態で塗料溜め空間Ｓが形成される。 The rotary atomizing head includes a stainless steel inner member 1 attached to the coating machine main body T and a cup-shaped aluminum outer member 2 to which the inner member 1 is detachable. The inner member 1 and the outer member 2 are connected to each other. The paint reservoir space S is formed in the coupled state.
前記アウター部材２の前面には塗料吐出穴３が形成され、この塗料吐出穴３よりも径方向外側のアウター部材２の前面を塗料を薄膜化する塗料吐出沿面４とし、塗料吐出穴３よりも径方向内側の中心部を背面側の塗料溜め空間Ｓに突出させてガイド部５とし、供給された塗料や洗浄液を左右に分配するようにしている。 A paint discharge hole 3 is formed on the front surface of the outer member 2, and the front surface of the outer member 2 radially outside the paint discharge hole 3 is a paint discharge creeping surface 4 for thinning the paint. The central portion on the radially inner side is projected into the paint reservoir space S on the back side to form a guide portion 5 so that the supplied paint and cleaning liquid are distributed to the left and right.
また、ガイド部５の周囲には複数の洗浄液吐出穴６が形成されている。この洗浄液吐出穴６はその軸線が前方において回転霧化ヘッドの軸線と交叉するように傾斜し、一方前記塗料吐出穴３も周方向に複数形成され、その軸線は後方において回転霧化ヘッドの軸線と交叉するように傾斜している。因みに、洗浄液吐出穴６よりも塗料吐出穴３の方の数が多い。 A plurality of cleaning liquid discharge holes 6 are formed around the guide portion 5. The cleaning liquid discharge hole 6 is inclined so that its axis intersects the axis of the rotary atomizing head in the front, while a plurality of the paint discharge holes 3 are also formed in the circumferential direction, and the axis is the axis of the rotary atomizing head in the rear. Inclined to cross. Incidentally, the number of the paint discharge holes 3 is larger than that of the cleaning liquid discharge holes 6.
また塗料吐出穴３の軸線は塗料溜め空間Ｓの側面の傾斜と略平行に設定され、これにより塗料溜め空間Ｓ内の塗料がスムーズに塗料吐出穴３内に入り、エア噛みなどが生じないようにしている。 Further, the axis of the paint discharge hole 3 is set substantially parallel to the inclination of the side surface of the paint reservoir space S, so that the paint in the paint reservoir space S smoothly enters the paint discharge hole 3 so that air biting does not occur. I have to.
またアウター部材２の背面側にはインナー部材１が嵌合する凹部７が形成されている。この凹部７は前半部分をインナー部材１の先部に合わせた雌テーパ部７ａとし、インナー部材１とアウター部材２の同芯が挿着時に自動的に図れるようにし、また凹部７の後半部分を雌ネジ部７ｂとしている。 A recess 7 into which the inner member 1 is fitted is formed on the back side of the outer member 2. The concave portion 7 is a female tapered portion 7a whose front half is aligned with the tip of the inner member 1 so that the inner member 1 and the outer member 2 can be automatically concentric when inserted, and the rear half of the concave portion 7 is The female screw portion 7b is used.
一方、インナー部材１の外周部には前記雌ネジ部７ｂと螺合する雄ネジ部１ａが形成され、またインナー部材１の背面側には塗装機本体Ｔへの挿着凹部８が形成され、この挿着凹部８は塗装機本体Ｔの芯合わせを行うための雌テーパ部８ａと一体的回転するための係合部８ｂが形成されている。尚、係合部８ｂを形成する代わりに雌テーパ部８ａに雌ネジ部を、この雌ネジ部に螺合する雄ネジ部を塗装機本体Ｔに形成してもよい。 On the other hand, a male screw portion 1a that is screwed with the female screw portion 7b is formed on the outer peripheral portion of the inner member 1, and an insertion concave portion 8 to the coating machine body T is formed on the back side of the inner member 1. The insertion recess 8 is formed with an engaging portion 8b for rotating integrally with a female tapered portion 8a for aligning the center of the coating machine body T. Instead of forming the engaging portion 8b, a female screw portion may be formed in the female taper portion 8a, and a male screw portion screwed into the female screw portion may be formed in the coating machine body T.
以上において、色替えの際には、塗装機本体Ｔから回転霧化ヘッドを取り外し、更にインナー部材１とアウター部材２とを分解し、塗料溜め空間Ｓを形成していたインナー部材１の前端面及びアウター部材２の凹部７の内側面を洗浄し、再度組み立てる。 In the above, at the time of color change, the rotary atomizing head is removed from the coating machine main body T, the inner member 1 and the outer member 2 are further disassembled, and the front end surface of the inner member 1 that has formed the paint reservoir space S. And the inner surface of the recess 7 of the outer member 2 is cleaned and reassembled.
以下の（表）は本発明に係る回転霧化ヘッドと従来の回転霧化ヘッドとを、塗膜平滑性、光輝性、隠蔽性、洗浄性、泡噛みの有無、滓の有無に関して比較したものである。 The following (Table) compares the rotary atomizing head according to the present invention and the conventional rotary atomizing head with respect to coating film smoothness, glossiness, concealability, cleanability, presence / absence of bubble chewing, and presence / absence of wrinkles. It is.
塗装条件は以下の通りである。
ベルカップ径：３０Φ、５０Φ、７０Φ
回転数 ：１万ｒｐｍ〜４万ｒｐｍ（３万ｒｐｍが最適）
引力電圧 ：−６０ｋＶ
吐出量 ：１００ｃｃ〜２００ｃｃ／分
材料 ：サテンシルバーメタリックＮＨ６２３Ｍ（関西ペイント）
タフタ ホワイトＮＨ５７Ｂ（日本ペイント）
The coating conditions are as follows.
Bell cup diameter: 30Φ, 50Φ, 70Φ
Rotation speed: 10,000 rpm to 40,000 rpm (30,000 rpm is optimal)
Attraction voltage: -60 kV
Discharge rate: 100cc-200cc / min Material: Satin Silver Metallic NH623M (Kansai Paint)
Taffeta White NH57B (Nippon Paint)
１…インナー部材、１ａ…雄ネジ部、２…アウター部材、３…塗料吐出穴、４…塗料吐出沿面、５…ガイド部、６…洗浄液吐出穴、７…インナー部材が嵌合する凹部、７ａ…雌テーパ部、７ｂ…雌ネジ部、８…塗装機本体への挿着凹部、８ａ…雌テーパ部、８ｂ…係合部、１０…ヘッド本体、１１…リング溝、１２…弾性リング、１３…ハブ部材、１４…塗料流出孔、１５…沿面、Ｓ…塗料溜め空間、Ｔ…塗装機。 DESCRIPTION OF SYMBOLS 1 ... Inner member, 1a ... Male screw part, 2 ... Outer member, 3 ... Paint discharge hole, 4 ... Paint discharge creepage surface, 5 ... Guide part, 6 ... Cleaning liquid discharge hole, 7 ... Recessed part which an inner member fits in, 7a ... Female taper part, 7b ... Female screw part, 8 ... Insertion recess to the coating machine body, 8a ... Female taper part, 8b ... Engagement part, 10 ... Head body, 11 ... Ring groove, 12 ... Elastic ring, 13 ... Hub member, 14 ... Paint outflow hole, 15 ... Creeping surface, S ... Paint reservoir space, T ... Coating machine.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003357925A JP4274894B2 (en) | 2003-10-17 | 2003-10-17 | Rotary atomizing head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003357925A JP4274894B2 (en) | 2003-10-17 | 2003-10-17 | Rotary atomizing head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2005118710A JP2005118710A (en) | 2005-05-12 |
| JP4274894B2 true JP4274894B2 (en) | 2009-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2003357925A Expired - Fee Related JP4274894B2 (en) | 2003-10-17 | 2003-10-17 | Rotary atomizing head |
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| Country | Link |
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| JP (1) | JP4274894B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103068491A (en) * | 2010-08-25 | 2013-04-24 | 丰田自动车株式会社 | Rotary atomizing head for electrostatic coater |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5398403B2 (en) * | 2009-07-27 | 2014-01-29 | 旭サナック株式会社 | Rotating atomizing head |
| WO2011083829A1 (en) | 2010-01-06 | 2011-07-14 | ランズバーグ・インダストリー株式会社 | Rotary atomizing head for electrostatic coating machine |
| JP5653875B2 (en) * | 2011-09-28 | 2015-01-14 | 本田技研工業株式会社 | Painting equipment |
| CN105939787B (en) | 2014-01-29 | 2018-02-27 | 本田技研工业株式会社 | Rotary-atomizing formula painting device and fog-spray nozzle |
| CN107708876A (en) * | 2015-06-30 | 2018-02-16 | 本田技研工业株式会社 | Spraying method and its device |
| WO2017047223A1 (en) * | 2015-09-17 | 2017-03-23 | 本田技研工業株式会社 | Rotary atomization type painting device and atomization head |
| JP6809395B2 (en) * | 2017-06-27 | 2021-01-06 | トヨタ車体株式会社 | Rotary atomization coating equipment |
-
2003
- 2003-10-17 JP JP2003357925A patent/JP4274894B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103068491A (en) * | 2010-08-25 | 2013-04-24 | 丰田自动车株式会社 | Rotary atomizing head for electrostatic coater |
| CN103068491B (en) * | 2010-08-25 | 2016-05-04 | 丰田自动车株式会社 | The rotary atomization head that electrostatic atomizer is used |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2005118710A (en) | 2005-05-12 |
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