JP2543398B2 - Spray nozzle for painting - Google Patents
Spray nozzle for paintingInfo
- Publication number
- JP2543398B2 JP2543398B2 JP63225898A JP22589888A JP2543398B2 JP 2543398 B2 JP2543398 B2 JP 2543398B2 JP 63225898 A JP63225898 A JP 63225898A JP 22589888 A JP22589888 A JP 22589888A JP 2543398 B2 JP2543398 B2 JP 2543398B2
- Authority
- JP
- Japan
- Prior art keywords
- spray
- nozzle
- shaped
- jet
- fan
- 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
- 239000007921 spray Substances 0.000 title claims description 60
- 238000010422 painting Methods 0.000 title claims description 5
- 238000000889 atomisation Methods 0.000 claims description 22
- 238000000576 coating method Methods 0.000 claims description 18
- 239000011248 coating agent Substances 0.000 claims description 17
- 238000007493 shaping process Methods 0.000 claims description 4
- 239000003973 paint Substances 0.000 description 15
- 239000007788 liquid Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 6
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000005002 finish coating Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000007888 film coating Substances 0.000 description 2
- 238000009501 film coating Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009503 electrostatic coating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
- B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
- B05B7/066—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
- B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
- B05B7/0815—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets with at least one gas jet intersecting a jet constituted by a liquid or a mixture containing a liquid for controlling the shape of the latter
Landscapes
- Nozzles (AREA)
- Electrostatic Spraying Apparatus (AREA)
- Coating Apparatus (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、エアレススプレーノズルから噴射される噴
出液に対してその外方から比較的低圧の空気流を供給添
加するようにしたスプレーノズルに関し、特に塗着効率
のよい仕上げ途装に好適なスプレーノズルに関するもの
である。Description: TECHNICAL FIELD The present invention relates to a spray nozzle adapted to supply and add a relatively low pressure air flow from the outside to a jetted liquid ejected from an airless spray nozzle. In particular, the present invention relates to a spray nozzle suitable for finishing with high coating efficiency.
エアレススプレーノズルは、噴口から液体を薄膜状に
射出し、射出された液体はその推進過程において霧化さ
れるのが普通である。An airless spray nozzle usually ejects a liquid in a thin film form from an injection port, and the ejected liquid is usually atomized in the propulsion process.
エアレススプレーノズルはその噴霧の形状が扇形のも
のが多く、扇形噴霧形成に当り、霧化を向上するために
は液体を高圧のもとに加圧する必要があり、特にスプレ
ー塗装においては塗料が大体において高粘度である関係
上、霧化を向上するためには塗料圧を100kg/cm2程度の
高圧に選定する必要があるばかりでなく、塗着効率が低
下する不利がある。Airless spray nozzles often have a fan-shaped spray shape, and when forming a fan-shaped spray, it is necessary to pressurize the liquid under high pressure to improve atomization. In order to improve atomization, not only the coating pressure needs to be set to a high pressure of about 100 kg / cm 2 but also the coating efficiency decreases because of its high viscosity.
従って、最近はエアレススプレーの外方から比較的低
圧のもとに空気流を供給添加し、しかも扇形噴霧を包み
込むように空気流を供給することが行われ、霧化を向上
すると同時に噴霧を整形しつつ飛散を抑制し、これによ
り塗料の圧力を20kg/cm2程度に低下させることができる
と共に、塗着効率を向上することができるようになっ
た。Therefore, recently, an air flow is supplied from the outside of the airless spray under a relatively low pressure, and further, an air flow is supplied so as to wrap the fan-shaped spray, improving atomization and simultaneously shaping the spray. While suppressing the scattering, the pressure of the coating can be reduced to about 20 kg / cm 2 and the coating efficiency can be improved.
上記従来技術によれば、仕上げ塗装のためには塗料圧
並びに空気圧を高くして霧化を向上する必要があるが、
圧力が高いと塗着効率が低下する不利があり、従って塗
料並びに空気の圧力を更に低下させるにも拘わらず霧化
を向上することが強く望まれるのであって、圧力を低下
させることにより塗着効率が向上するのである。According to the above prior art, it is necessary to increase the paint pressure and air pressure to improve atomization for finish coating,
Higher pressure has the disadvantage of lowering the coating efficiency, and therefore it is strongly desired to improve atomization in spite of further reducing the pressure of the paint and the air. Efficiency is improved.
また、塗装能率を向上するためには、ノズルにおける
塗料の吐出量を増大させるのが普通であるが、ノズル噴
液口の口径を増大することは概ね霧化作用が低下するの
であり、しかも塗料圧を低く選定することにより単位時
間当りの吐出量は少ないのが当然であるから、吐出量確
保のためにはノズル噴液口の口径を増大することが必要
となり、前記霧化性が低下して好ましくない。Further, in order to improve the coating efficiency, it is usual to increase the discharge amount of the coating material in the nozzle, but increasing the diameter of the nozzle spray port generally reduces the atomizing action, and Since it is natural that the discharge amount per unit time is small by selecting a low pressure, it is necessary to increase the diameter of the nozzle injection port in order to secure the discharge amount, and the atomization property deteriorates. Is not preferable.
これが対策として、ノズル噴液口を複数個設けること
が考えられるが、単に複数のノズル噴液口をその噴射扇
形噴霧が接近する平行状態に形成されるように並設する
と、それら扇形噴流の中間における空気が噴霧に随伴し
て前方へ搬送されて両扇形噴流の間隙が負圧となる関係
上、両扇形流が完全に霧化される以前に基端に近い部分
において合体して一つの扇形噴流となって推進すること
になり、従ってこのような合流による扇形噴霧は一つの
オリフィスから噴出した噴霧におけると同様に霧滴の粒
径が大きくなるため、結果的に霧化の向上には役立たな
いのである。As a countermeasure, it is conceivable to provide a plurality of nozzle jets, but simply by arranging a plurality of nozzle jets in parallel so that the jets of the jets are close to each other, the middle of the jets of the jets is formed. Since the air in the fan is conveyed forward along with the spray and the gap between the two fan-shaped jets becomes a negative pressure, the two fan-shaped jets coalesce into a fan-shaped part near the base end before they are completely atomized. As a result, the fan-shaped spray due to such merging increases the particle size of the fog droplets as in the spray ejected from one orifice, and as a result, it is useful for improving atomization. There is no.
そこで本発明の目的は、塗料および空気の加圧程度を
低下させるにも拘わらず霧化の優れた噴霧を得ることが
できるスプレーノズルを提供することにあり、また他の
目的は吐出量が多くしかも霧化の優れた噴霧が得られる
スプレーノズルを提供することにある。Therefore, an object of the present invention is to provide a spray nozzle that can obtain a spray with excellent atomization despite reducing the pressurization degree of paint and air, and another object is to provide a large discharge amount. Moreover, it is to provide a spray nozzle capable of obtaining a spray with excellent atomization.
本発明は、上記目的を達成するため、断面がほぼＶ字
状の内部溝と外部溝との交叉によりほぼ鞍形の複数個の
エアレス用オリフイス型噴液口を、その噴液口から噴出
する各扇形噴流の扇形面同士が対向状態の並行でかつ前
方に漸次離反する方向へ形成される状態のもとに、隣接
噴液口と並列かつ噴液口軸線が互いに前方に漸次離反す
る状態に配設するほか、これら噴液口の外方には霧化向
上並びに噴霧整形用の噴気口を設けたものである。In order to achieve the above object, the present invention ejects a plurality of saddle-shaped orifice-type jet nozzles for airless from the jet nozzles by intersecting an internal groove and an external groove having a substantially V-shaped cross section. Under the condition that the fan-shaped surfaces of each fan-shaped jet flow face each other in parallel and in the direction in which they gradually separate from each other in the forward direction, the condition in which they are parallel to the adjacent jets and the axes of the jet nozzles gradually separate from each other In addition to the arrangement, a jet port for improving atomization and spray shaping is provided outside the jet port.
複数の噴液口はその扇形噴流が斜め前向きとなるよう
に設けるのがよく、また噴気口については前記複数の扇
形噴流を包囲する状態の空気流が形成されるように、環
状噴気口もしくは列設状態のスリット状噴気口もしくは
列設された多数の噴気口を設け、更に必要に応じ噴霧扁
平化用空気流の噴出に適応する噴気口を前記噴液口の両
側方に設けるのが適当である。It is preferable that the plurality of jet nozzles are provided so that the fan-shaped jets are directed obliquely forward, and the jet nozzles have annular jet nozzles or rows so that an air flow surrounding the fan-shaped jet jets is formed. It is appropriate to provide a slit-shaped fumarole in the installed state or a large number of fumaroles arranged in a row, and further to provide fumaroles adapted to the ejection of the air stream for spray flattening on both sides of the fountain jet if necessary. is there.
その他複数個の噴液口を開設したノズルチップの先端
部に前向きの針状電極を設けると共に、この針状電極に
高圧電源から電圧を印加することにより静電塗装に適応
させることができるようにするのが望ましい。In addition, a needle-like electrode facing forward is provided at the tip of the nozzle tip with a plurality of jet holes, and a voltage is applied to this needle-like electrode from a high voltage power supply so that electrostatic coating can be applied. It is desirable to do.
外部溝とＶ字状断面の内部溝との交叉により得られる
ほぼ鞍形のオリフィス型噴液口から高粘度加圧塗料を噴
出させると、扇形角度が100°以上の広角扇形噴霧が得
られる関係上、広面積の能率的な塗装に好適であるばか
りでなく、噴液口から噴出直後の液膜が著しく薄く形成
されて霧化が促進され、しかも複数の噴液口であるため
噴液口の個数に応じて吐出量を増加することができ、従
って厚膜塗装あるいは高速掃引による高能率塗装が可能
である。A wide-angle fan-shaped spray with a fan-shaped angle of 100 ° or more can be obtained by spraying high-viscosity pressurized paint from an approximately saddle-shaped orifice-type jet that is obtained by the intersection of the external groove and the internal groove of V-shaped cross section. Moreover, not only is it suitable for efficient coating of a wide area, but the liquid film immediately after jetting from the jet nozzle is formed to be extremely thin to promote atomization, and since there are multiple jet nozzles, the jet nozzle It is possible to increase the discharge amount according to the number of coatings, so that thick film coating or high efficiency coating by high speed sweep is possible.
また、エアレス式の噴霧に対してその外方から空気流
を供給添加することにより、前記扇形噴霧の広角化と相
俟って霧化が著しく向上するから、塗料および空気の供
給圧力を低下させることができ、このように供給圧力を
させると噴霧の推進速度を仕上げ塗装に好適な状態に低
速化することができる。Further, by supplying and adding an air flow from the outside to the airless spray, atomization is remarkably improved in combination with the widening of the fan-shaped spray, so that the supply pressure of paint and air is reduced. It is possible to reduce the propelling speed of the spray to a state suitable for finish coating by applying the supply pressure in this way.
その他扇形噴霧を包み込むように空気流を添加する
と、霧化を促進すると共に霧滴の飛散を抑制して塗着効
率が向上するのであり、更に塗料ノズルの先端に立設し
た針状電極により噴霧に電荷を印加すると、静電霧化作
用により霧化が促進されるほか、被塗装物への静電吸引
作用により塗着効率が向上するのである。In addition, if an air flow is added to wrap the fan-shaped spray, it promotes atomization and suppresses the scattering of fog droplets to improve the coating efficiency.Furthermore, a needle-shaped electrode erected at the tip of the paint nozzle sprays. When the electric charge is applied to, the atomization is promoted by the electrostatic atomization action, and the coating efficiency is improved by the electrostatic attraction action to the object to be coated.
以下、図面に示す実施例について詳細に説明する。 Hereinafter, embodiments shown in the drawings will be described in detail.
先づ第１図ないし第５図に示す実施例について述べる
と、大体において広角扇形噴霧に適応する複数個のオリ
フィス型噴液口1,1を、その噴液口１から噴出する扇形
噴流の扇形面同士が対向状態の並行でかつ前方に漸次離
反する斜め前方へ噴出するように、隣接の噴液口１と並
列でかつ噴液口軸線が互いに前方に漸次離反する状態に
配設したノズルチップ２を塗料ノズル部材３の先端に嵌
着すると共に、噴気口４がある空気ノズル部材５を設け
てこの空気ノズル部材５を前記塗料ノズル部材３の外周
側にその噴気口４がノズルチップ２の外方に配設される
ように嵌合し、なお空気ノズル部材５には塗料ノズル部
材３との嵌合部分に溝６を設けると共に、これに対し塗
料ノズル部材３には突起７を設けて両部材３と５との嵌
合に当り位置を規制するようにする。First, the embodiment shown in FIGS. 1 to 5 will be described. Generally, a plurality of orifice type jet nozzles 1, 1 adapted to wide-angle fan-shaped spray is ejected from the jet nozzle 1 to form a fan-shaped jet. Nozzle tip arranged in parallel with the adjacent jet nozzles 1 and in such a state that the jet nozzle axis lines are gradually separated from each other so that the surfaces are opposed to each other in parallel and are gradually separated from each other. 2 is fitted to the tip of the paint nozzle member 3, and an air nozzle member 5 having a jet port 4 is provided, and the air nozzle member 5 is provided on the outer peripheral side of the paint nozzle member 3 and the jet port 4 of the nozzle tip 2 is provided. The air nozzle member 5 is provided with a groove 6 in the fitting portion with the paint nozzle member 3, while the projection 7 is provided on the paint nozzle member 3. Restricts the contact position when fitting both members 3 and 5 together So as to.
前記ノズルチップ２に設ける噴液口１としては、例え
ば第３図ないし第５図に詳示するように、超硬合金等の
硬質材製ノズルチップ２に、両側面が傾斜しているほぼ
Ｖ字状断面の内部溝８と角筒状通路９とからなる平たが
ね状の凹穴を後方開放状態に設けると共に、前端にはＶ
字状断面の環状外部溝10をその溝底付近が前記内部溝８
と適度の深さに交叉して鞍形を呈する複数の前記オリフ
ィス型噴液口1,1が形成されるように設け、これにより
後方から数kg/cm2程度に加圧された塗料を供給すること
により複数の噴液口1,1から断面が円弧状のその扇形噴
霧の扇形面同士が対向状態の並行でかつ前方に漸次離反
する斜め前方へ形成するようにし、また空気ノズル部材
５に設ける噴気口４としては、嵌合配設されたノズルチ
ップ２の外周側に環状間隙が形成されるように円形の前
記噴気口４を設け、なお前記塗料ノズル部材３の外周寄
り部分に通気路11,11を穿設し、これにより後方から通
気路11,11を経て数kg/cm2以下に加圧された空気を供給
することにより噴気口４から前記扇形噴霧を包み込む傾
向のもとに筒状空気流を前向きに供給することができる
ようにし、その他必要に応じ前記噴気口４の外方には噴
霧整形に適応する補助噴気口12,12および13,13を設ける
ほか、別の補助噴気口14,14を設けて扇形噴霧の外方か
ら空気流を供給するようにし、更に空気ノズル部材５に
はその前端面の外方寄り部分に前方への突出部15,15を
対称的に設けると共に、この両突出部15には斜め前向き
の扁平化用噴気口16,16を内向きに設けるほか、この噴
気口16に連通する給気路17,17を設け、以て後方から給
気路17を経て数kg/cm2以下の加圧空気を供給して噴気口
16,16から噴霧に衝触させることにより、噴霧を扇形状
に扁平化することができるようにする。As shown in detail in FIGS. 3 to 5, the jet port 1 provided in the nozzle tip 2 is a nozzle tip 2 made of a hard material such as cemented carbide, and both sides thereof are substantially V-shaped. A flat glass-shaped concave hole consisting of an internal groove 8 having a V-shaped cross section and a square tubular passage 9 is provided in the rear open state, and V is formed at the front end.
An annular outer groove 10 having a V-shaped cross section is provided with the inner groove 8 near the groove bottom.
It is provided so that a plurality of saddle-shaped orifice-type jets 1 and 1 are formed by intersecting with an appropriate depth, and by this, the paint pressurized to several kg / cm 2 is supplied from the rear. By doing so, the fan-shaped surfaces of the fan-shaped sprays having an arc-shaped cross section are formed in parallel with each other in an opposed state and obliquely frontward and gradually separated from each other, and the air nozzle member 5 is formed. As the provided fumarole 4, the circular fumarole 4 is provided so that an annular gap is formed on the outer peripheral side of the fitted nozzle tip 2, and the vent passage is provided in the portion near the outer circumference of the paint nozzle member 3. In order to wrap the fan-shaped spray from the fumarole 4 by piercing 11,11 and thereby supplying air pressurized to several kg / cm 2 or less from the rear through the ventilation paths 11,11. Allows a cylindrical air flow to be supplied in the forward direction and Auxiliary fumaroles 12, 12 and 13, 13 adapted to spray shaping are provided outside the fumarole 4, and other auxiliary fumaroles 14 and 14 are provided to supply an air flow from the outside of the fan-shaped spray. Further, the air nozzle member 5 is provided with forwardly projecting portions 15 and 15 symmetrically on the outer side portion of the front end face thereof, and both of these projecting portions 15 are obliquely forwardly directed flattening fumes 16. In addition to installing 16 inwardly, air supply passages 17 and 17 communicating with the air outlet 16 are provided, so that pressurized air of several kg / cm 2 or less is supplied from the rear through the air supply passage 17 to the air outlet.
The spray can be flattened into a fan shape by contacting the spray with 16,16.
以上のほか、静電塗装に適応させるためには、前記ノ
ズルチップ２の先端中央に針状電極18を前向きに植設す
ると共に、塗料ノズル部材３を導電性材製としてこれに
高電圧源19を接続して必要に応じ針状電極18に高電圧を
印加することにより、塗料噴霧を帯電させることができ
るようにする。なお針状電極18の植設位置はノズルチッ
プの先端ではなく空気ノズル部材５の前端でもよいので
ある。In addition to the above, in order to adapt to electrostatic painting, a needle-shaped electrode 18 is planted forward in the center of the tip of the nozzle tip 2, and the paint nozzle member 3 is made of a conductive material, and a high voltage source 19 is applied thereto. And a high voltage is applied to the needle-shaped electrode 18 as necessary to charge the paint spray. The needle electrode 18 may be implanted at the front end of the air nozzle member 5 instead of the tip of the nozzle tip.
ノズルチップ２における噴液口４については、第６図
ないし第８図のように、前方中央において屈曲するＶ字
状断面の内部溝８と角筒状通路９とからなる斧形の凹穴
をノズルチップ２に後方開放状態に設けると共に、前端
にはＶ字状断面の外部溝10,10を互いに平行のまま前記
内部溝８と直角のもとに適度の深さに交叉させて鞍形の
オリフィス型噴液口1,1を形成するようにしてもよく、
また第９図および第10図のように、内部溝8,8が筒状通
路９の外周の対称位置に設けられた凹穴をノズルチップ
２に設けると共に、外部溝10,10をノズルチップ２の周
面から前記内部溝８に適度の深さのもとに交叉させてほ
ぼ鞍形のオリフィス型噴液口1,1を斜め外向きに対称的
に形成するようにしてもよい。As shown in FIGS. 6 to 8, the injection port 4 of the nozzle tip 2 has an ax-shaped recessed hole including an internal groove 8 having a V-shaped cross section and a square tubular passage 9 which are bent at the front center. The nozzle tip 2 is provided in a rear open state, and external grooves 10 having a V-shaped cross section are formed in a saddle shape at the front end while being parallel to each other and intersecting with the internal groove 8 at a right depth. Orifice type jets 1, 1 may be formed,
Further, as shown in FIG. 9 and FIG. 10, concave holes are provided in the nozzle tip 2 in which the inner grooves 8 and 8 are provided at symmetrical positions on the outer periphery of the tubular passage 9, and the outer grooves 10 and 10 are provided in the nozzle tip 2. It is also possible to intersect the inner groove 8 with a proper depth from the peripheral surface thereof to form a substantially saddle-shaped orifice type injection liquid port 1, 1 obliquely outward and symmetrically.
なお噴液口１の個数については、２個に限らず第11図
のように３個でもよく、また第12図および第13図のよう
に４個でもよく、あるいはそれ以上でもよいこと当然で
ある。The number of the jet ports 1 is not limited to two, but may be three as shown in FIG. 11, four as shown in FIGS. 12 and 13, or more. is there.
空気ノズル部材５に設ける噴気口４については円形に
限らず噴液口１との均衝を保つため種々変更するのが適
当であるから、橢円形，長方形に形成し、あるいはスリ
ット状のものを複数個配設し、あるいは円形の小径孔を
多数列設してもよく、あるいは第14図のように空気ノズ
ル部材５の中央内向き部分にドーム状凹穴20を後方開放
状態のもとに設けると共に、前面には断面がＶ字状の溝
21を凹穴20と適度の深さに交叉することにより、ほぼリ
ップ状のオリフィス型噴気口４を形成し、この噴気口４
から噴霧を包み込む状態のもとに扇形状に空気流を噴出
するようにしてもよい。The air nozzle 4 provided in the air nozzle member 5 is not limited to a circular shape, but it is appropriate to change variously in order to maintain the equilibrium with the liquid outlet 1. Therefore, it may be formed in a circular shape, a rectangular shape, or a slit shape. A plurality of circular small-diameter holes may be arranged, or a large number of circular small-diameter holes may be arranged, or a dome-shaped recessed hole 20 may be formed in the central inward portion of the air nozzle member 5 as shown in FIG. A groove with a V-shaped cross section on the front
By crossing the recess 21 with the recess 20 to an appropriate depth, a substantially lip-shaped orifice type fumarole 4 is formed.
The airflow may be ejected in a fan shape under the condition that the spray is wrapped from inside.
前記内部溝８および外部溝10の断面形状については、
その溝底を尖鋭にすることなく丸味を付与し、あるいは
有幅底の逆台形としてもよく、なお外部溝10については
その断面形状をＵ字状あるいは方形にしてもよいのであ
る。Regarding the cross-sectional shapes of the inner groove 8 and the outer groove 10,
The groove bottom may be rounded without being sharpened or may have an inverted trapezoidal shape with a wide bottom, and the external groove 10 may have a U-shaped or rectangular cross section.
以上説明したように、本発明によれば、次のような諸
効果が得られる。As described above, according to the present invention, the following various effects can be obtained.
（ａ）ほぼＶ次状断面の内部溝と外部溝との交叉により
得られる鞍形のオリフィス型噴液口を採択したことによ
り、広角扇形噴流が得られるから、広面積の能率的塗装
に好都合であるばかりでなく、噴液口から噴出した直後
の噴流はその扇形角度が広角であるから、著しく薄い膜
状であり、従って霧化が促進され塗料の圧力を低下させ
るに拘わらず良好な霧化が容易に得られる。(A) Adopting a saddle-shaped orifice-type jet, which is obtained by the intersection of the internal groove and the external groove having a substantially V-shaped cross section, a wide-angle fan-shaped jet can be obtained, which is convenient for efficient coating of a wide area. Not only that, but the jet immediately after being ejected from the jet nozzle has a wide fan-shaped angle, and therefore has a remarkably thin film shape. Can be easily obtained.
（ｂ）広角扇形噴霧に適応する噴液口を複数個並行状態
でしかも噴液口軸線が互いに前方に漸次離反する状態に
設けたから、霧化作用を低下させない状態のもとに吐出
量を増加することができ、従って厚膜塗装についても高
能率のもとに容易に適応し、また高速掃引による高能率
塗装に適応させることができる。(B) Since a plurality of spray nozzles adapted to wide-angle fan-shaped spraying are arranged in parallel and the spray nozzle axes are gradually separated from each other in the forward direction, the discharge amount is increased without reducing the atomization action. Therefore, thick film coating can be easily applied with high efficiency, and high efficiency coating by high speed sweep can be applied.
（ｃ）広角扇形噴霧による霧化向上に加えて外方から空
気流を供給添加するようにしたから、霧化作用が相乗的
に向上し、塗料および空気の供給圧力をそれぞれ数kg/c
m2および数kg/cm2以下に低下させることができ、従って
噴霧の推進速度が低速となって仕上げ塗装に最適な噴霧
状態が得られるばかりでなく、塗着効率を向上すること
ができる。(C) In addition to the improvement of atomization by wide-angle fan-shaped spray, the air flow is added from the outside to improve the atomization action synergistically, and the supply pressure of paint and air is several kg / c respectively.
It is possible to reduce m 2 and several kg / cm 2 or less. Therefore, not only is the spray propelling speed slowed down to obtain the optimum spray state for finish coating, but also the coating efficiency can be improved.
（ｄ）噴霧の外方から供給する空気流を噴霧が包み込ま
れるように供給するようにすると、噴霧の飛散が抑制さ
れて推進速度の低速化と相俟って塗着効率を向上すると
共に、環境の汚染防止並びに清浄化施設の省略ができ
る。(D) When the airflow supplied from the outside of the spray is supplied so as to wrap the spray, the scattering of the spray is suppressed and the coating efficiency is improved in combination with the lowering of the propulsion speed. Preventing environmental pollution and omitting purification facilities.
（ｅ）単一ノズルチップに複数個の噴液口を設けるよう
にしたからノズル先端に針状電極を植設するのに好都合
であり、帯電効果上も有利である。(E) Since a single nozzle tip is provided with a plurality of liquid ejection ports, it is convenient to implant a needle-like electrode at the tip of the nozzle and is advantageous in terms of charging effect.
（ｆ）ノズルチップに針状電極を設けて噴霧を帯電させ
ると、広角扇形噴霧の形成による霧化作用および外方か
らの空気流供給による霧化作用と相俟って静電霧化作用
が相乗的に作用して仕上げ塗装に好適なスプレーを得る
ことができる。(F) When the nozzle tip is provided with a needle-shaped electrode to charge the spray, an electrostatic atomization effect is produced in combination with the atomization effect due to the formation of the wide-angle fan-shaped spray and the atomization effect due to the air flow supply from the outside. It is possible to work synergistically to obtain a spray suitable for finishing.
（ｇ）噴霧扁平化用噴気口を設けると、複数個の噴液口
から噴出する複数の噴霧の合成噴霧形状が扇形状となら
ない場合の噴霧の扇形化に効果がある。(G) Providing the spray flattening fumarole is effective in fanning the spray when the combined spray shape of the plurality of sprays ejected from the plurality of jet ports is not fan-shaped.
図面は本発明の塗装用スプレーノズルを示すものであっ
て、第１図および第２図はそれぞれ一実施例におけるス
プレーノズルの縦断側面図および正面図、第３図ないし
第５図はノズルチップだけを詳示するものであって、第
３図は縦断側面図、第４図は正面図、第５図は横断平面
図、第６図ないし第８図は他の実施例におけるノズルチ
ップを示すものであって、第６図は縦断側面図、第７図
は正面図、第８図は横断平面図、第９図および第10図は
それぞれ更に他の実施例におけるノズルチップの縦断側
面図および一部破断正面図、第11図は更に他の実施例に
おけるノズルチップの要部の縦断側面図、第12図および
第13図はそれぞれ更に他の実施例におけるノズルチップ
の縦断側面図および縦断正面図、また第14図は更に他の
実施例における噴気口を示す要部の縦断側面図である。 １……噴液口 ２……ノズルチップ ４……噴気口 ８……内部溝 10……外部溝 12……噴気口 13……噴気口 14……噴気口 16……噴気口 18……針状電極The drawings show a spray nozzle for painting according to the present invention. FIGS. 1 and 2 are vertical side views and front views of the spray nozzle according to one embodiment, and FIGS. Fig. 3 is a vertical side view, Fig. 4 is a front view, Fig. 5 is a cross-sectional plan view, and Figs. 6 to 8 show nozzle tips in other embodiments. FIG. 6 is a vertical side view, FIG. 7 is a front view, FIG. 8 is a cross-sectional plan view, and FIGS. 9 and 10 are vertical side views of nozzle tips in still another embodiment. Partly broken front view, FIG. 11 is a vertical cross-sectional side view of a main part of a nozzle tip according to still another embodiment, and FIGS. 12 and 13 are vertical cross-sectional side view and vertical front view of a nozzle tip according to still another embodiment. Fig. 14 shows the fumarole in still another embodiment. FIG. 5 is a vertical cross-sectional side view of the main part of FIG. 1 ... Jet port 2 ... Nozzle tip 4 ... Jet port 8 ... Internal groove 10 ... External groove 12 ... Jet port 13 ... Jet port 14 ... Jet port 16 ... Jet port 18 ... Needle Electrode
Claims (3)
（10）とをクロス状態に交叉させることにより、ほぼ鞍
形に開口されるエアレス用オリフィス型噴液口（１）を
複数個設け、前記噴液口（１）はこれを各噴液口（１）
から噴出する扇形噴流の扇形面同士が対向した並行に形
成される状態のもとに、隣接の噴液口（１）と並列でか
つ噴液口軸線が互いに前方に漸次離反する状態に配設す
るほか、これら噴液口（１）の外方には霧化向上並びに
噴霧整形用の噴気口（４）を設けたことを特徴とする塗
装用スプレーノズル。1. An orificeless jet nozzle for airless (1) opened in a substantially saddle shape by crossing an internal groove (8) and an external groove (10) having a substantially V-shaped cross section in a crossed state. A plurality of jet nozzles (1) are provided, and each of the jet nozzles (1) is provided with the jet nozzle
Arranged in parallel with the adjacent jet ports (1) and with the axes of the jet ports gradually distant from each other in front of each other, with the fan-shaped faces of the fan-shaped jets ejecting from each other facing each other in parallel. In addition, a spray nozzle for painting is characterized in that a spray port (4) for improving atomization and spray shaping is provided outside the spray port (1).
（２）の先端に針状電極（18）を突設してなる請求項１
記載の塗装用スプレーノズル。2. A needle-shaped electrode (18) protruding from the tip of a nozzle tip (2) provided with a plurality of jetting holes (1).
The spray nozzle for painting described.
口（16）を設けてなる請求項１記載の塗装用スプレーノ
ズル。3. The spray nozzle for coating according to claim 1, further comprising an air outlet (16) adapted to eject the air stream for spray flattening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63225898A JP2543398B2 (en) | 1988-09-09 | 1988-09-09 | Spray nozzle for painting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63225898A JP2543398B2 (en) | 1988-09-09 | 1988-09-09 | Spray nozzle for painting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02198652A JPH02198652A (en) | 1990-08-07 |
| JP2543398B2 true JP2543398B2 (en) | 1996-10-16 |
Family
ID=16836613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63225898A Expired - Fee Related JP2543398B2 (en) | 1988-09-09 | 1988-09-09 | Spray nozzle for painting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2543398B2 (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4879013U (en) * | 1971-12-27 | 1973-09-28 | ||
| JPS5642352U (en) * | 1979-09-11 | 1981-04-18 | ||
| JPS56102960A (en) * | 1980-01-19 | 1981-08-17 | Asahi Okuma Ind Co Ltd | Apparatus for coating with plural liquids |
| JPS59206065A (en) * | 1983-05-10 | 1984-11-21 | Asahi Okuma Ind Co Ltd | Nozzle for airless painting |
| JPS601463U (en) * | 1983-06-13 | 1985-01-08 | 箭内 弘 | Painting spray nozzle |
| DE3412266A1 (en) * | 1984-04-02 | 1985-10-03 | J. Wagner AG, Altstätten | ELECTROSTATIC PAINT SPRAY GUN |
| DE3611577A1 (en) * | 1986-04-07 | 1987-10-15 | Wagner Int | ELECTROSTATIC POWDER SPRAY GUN |
| JPH043643Y2 (en) * | 1986-08-06 | 1992-02-04 | ||
| JPS6377649U (en) * | 1986-11-12 | 1988-05-23 |
-
1988
- 1988-09-09 JP JP63225898A patent/JP2543398B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02198652A (en) | 1990-08-07 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |