JPS6355988B2 - - Google Patents
Info
- Publication number
- JPS6355988B2 JPS6355988B2 JP8234083A JP8234083A JPS6355988B2 JP S6355988 B2 JPS6355988 B2 JP S6355988B2 JP 8234083 A JP8234083 A JP 8234083A JP 8234083 A JP8234083 A JP 8234083A JP S6355988 B2 JPS6355988 B2 JP S6355988B2
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- paint
- nozzle holes
- degrees
- axes
- 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
Links
- 238000010422 painting Methods 0.000 claims description 7
- 239000003973 paint Substances 0.000 description 27
- 239000011362 coarse particle Substances 0.000 description 6
- 239000007788 liquid Substances 0.000 description 6
- 238000000889 atomisation Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Description
【発明の詳細な説明】
本発明は、液体塗料を高圧力に加圧し、小径の
噴孔から空気中に高速度で噴射して空気との摩擦
により微粒化するエアレス塗装に用いるノズルに
関し、さらに詳細には、２個の噴孔から噴出した
塗料流を互いに衝突させるようにしたノズルに関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a nozzle used for airless painting that pressurizes liquid paint to high pressure and injects it into the air from a small-diameter nozzle hole at high speed to atomize it by friction with the air. Specifically, the present invention relates to a nozzle that causes paint streams ejected from two nozzle holes to collide with each other.
従来、２個の噴孔から噴出した塗料流を互いに
衝突させることにより、１個の噴孔から噴出した
塗料流から粒子の粗い副流が生じて塗膜の両側に
テールと呼ばれる部分を生じ、これが塗装面に縞
模様となつて現われるのを防止するようにしたエ
アレス塗装用ノズルは、特公昭38−5573号公報に
記載されて公知となつている。 Conventionally, by colliding paint streams ejected from two nozzles with each other, a coarse-grained side stream is generated from the paint stream ejected from one nozzle, creating parts called tails on both sides of the paint film. An airless painting nozzle designed to prevent this from appearing as a striped pattern on the painted surface is known as described in Japanese Patent Publication No. 38-5573.
しかし、この公報に記載されたノズルは、Ｙ字
形に分岐したボデイの先端部内側に、小径の噴孔
を形成した２個のチツプを軸線同士が互いに交差
するように調節して嵌着する構造になつていたた
め、構造が複雑で必然的に大型化して操作性が悪
く、かつ、噴孔の前面の開口から交点までの距離
が長くなるため、衝突前の塗料流から粗大な粒子
が分離して塗装面を不良にし、さらには、塗料流
の衝突時の交角が90度乃至160度と大きいため、
衝突した塗料の一部が逆流してノズルに付着し、
これが滴下して塗装面を汚すなどの欠点があつ
て、実用化に至らなかつた。 However, the nozzle described in this publication has a structure in which two chips with small-diameter nozzle holes are adjusted and fitted so that their axes intersect with each other, inside the tip of a Y-shaped branched body. Because of this, the structure is complicated and inevitably large, making it difficult to operate.Also, since the distance from the front opening of the nozzle hole to the intersection is long, coarse particles may separate from the paint flow before collision. Furthermore, the angle of intersection of the paint streams at the time of collision is large, ranging from 90 degrees to 160 degrees, resulting in poor painted surfaces.
Some of the collided paint flows back and adheres to the nozzle,
This had drawbacks such as dripping and staining painted surfaces, so it was not put into practical use.
そこで本発明者は、後面に導入孔を形成したボ
デイの前面に、その噴孔に達する２個の噴孔を、
開口から５mm以内の点において軸線同士が30度乃
至90度の角度で互いに交差するように形成したエ
アレス塗装用ノズルを開発し、粗大粒子の発生が
なく、衝突後のノズル側への逆流がなく、かつ、
従来の単孔ノズルと同程度の大きさにすることが
できる等の優れた効果を奏することができたので
あるが、このノズルを用いて塗料を噴射すると、
第４図に誇張して示すように、被塗装面ａに塗着
した塗膜ｂの厚さが全幅にわたつて略一定にな
り、塗膜ｂの幅方向の端部を少しずつ重ね合わせ
て塗装する場合に、その重なり合う部分の厚さが
他の部分の約２倍となつて、塗装面上に縞が表わ
れるとともに、衝突後に扇形となつて広がる塗料
流の広がり角が小さいため、一度塗りで塗装し得
る幅が狭いという改良の余地があることが確認さ
れた。なお、２つの噴孔の軸線の交角を大きくす
ると、衝突後の塗料流の広がり角を大きくするこ
とが可能であるが、交角が大き過ぎると、既述の
ように、衝突後にノズル側へ向う逆流が生ずるた
め、２つの噴孔の軸線の交角は90度以下にする必
要があり、交角を大きくすることによる広がり角
の拡大には限度がある。 Therefore, the inventor of the present invention created two nozzle holes reaching the nozzle holes on the front side of the body with an introduction hole formed on the rear side.
We have developed an airless painting nozzle in which the axes intersect with each other at an angle of 30 to 90 degrees at a point within 5 mm from the opening, and there is no generation of coarse particles and no backflow to the nozzle side after collision. ,and,
This nozzle was able to achieve excellent results, such as being able to make the nozzle about the same size as a conventional single-hole nozzle, but when spraying paint using this nozzle,
As shown in an exaggerated manner in Figure 4, the thickness of the coating film b applied to the surface to be coated a is approximately constant over the entire width, and the edges of the coating film b in the width direction are overlapped little by little. When painting, the thickness of the overlapping parts is about twice that of other parts, causing stripes to appear on the painted surface, and because the spread angle of the paint flow that spreads out in a fan shape after collision is small, once It was confirmed that there is room for improvement in that the width that can be painted is narrow. In addition, by increasing the intersection angle of the axes of the two nozzle holes, it is possible to increase the spread angle of the paint flow after the collision, but if the intersection angle is too large, as mentioned above, the paint flow will move toward the nozzle side after the collision. Since backflow occurs, the intersection angle between the axes of the two nozzle holes must be 90 degrees or less, and there is a limit to the expansion of the spread angle by increasing the intersection angle.
本発明は、上述のノズルをさらに改良し、重ね
塗りを行ない易く、かつ塗料流の広がり角の大き
いノズルを提供することを目的とするものであ
る。 The object of the present invention is to further improve the above-mentioned nozzle, and to provide a nozzle that allows easy overcoating and has a large spread angle of paint flow.
以下、本発明の一実施例を添付図面に基づいて
説明する。 Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.
第１〜３図において、２は後面中央に導入孔３
が、前面中央に導入孔３に達するＶ溝４が、ま
た、後端部外周に鍔５が夫々形成されたステンレ
ス鋼等の耐食性に優れた金属からなるケースであ
つて、そのケース２の導入孔３の前端に超硬合金
またはセラミツクス等の耐摩耗性に優れた材料か
らなるチツプ６が嵌着されてボデイ１が構成され
ており、チツプ６には、Ｖ溝４の谷底と導入孔３
の軸線を含む平面を中心とする対称形をなして導
入孔３に達する２個を１対とする直径0.3mmの円
形をなす２対の噴孔７ａ，７ａ，７ｂ，７ｂが対
をなす２個の噴孔７ａ，７ａ，７ｂ，７ｂの軸線
同士が各開口から２mmの点Ｐにおいて60度の角度
で交差し、かつ、一方の対の噴孔７ａ，７ａの軸
線を含む平面と、他方の対の噴孔７ｂ，７ｂの軸
線を含む平面との間隔が60度の角度で前方に向つ
て拡開するように透設されている。 In Figures 1 to 3, 2 is the introduction hole 3 in the center of the rear surface.
However, the case is made of a metal with excellent corrosion resistance such as stainless steel, and has a V groove 4 reaching the introduction hole 3 at the center of the front surface and a flange 5 at the outer periphery of the rear end. A tip 6 made of a material with excellent wear resistance such as cemented carbide or ceramics is fitted into the front end of the hole 3 to form the body 1.
Two pairs of circular nozzle holes 7a, 7a, 7b, 7b with a diameter of 0.3 mm, each pair consisting of two nozzle holes 7a, 7a, 7b, 7b, which are symmetrical about a plane containing the axis of The axes of the nozzle holes 7a, 7a, 7b, 7b intersect with each other at an angle of 60 degrees at a point P 2 mm from each opening, and a plane containing the axes of one pair of nozzle holes 7a, 7a and the other The pair of nozzle holes 7b, 7b are transparently provided so that the distance from the plane containing the axes of the nozzle holes 7b widens forward at an angle of 60 degrees.
上記構成になるノズルは、開閉弁１０を備えた
ガン本体１１の先端にパツキン１２を介して接合
され、ケース２の鍔５に係止するハブナツト１３
をガン本体１１に螺合することにより、導入孔３
を開閉弁１０の吐出孔１４に整合して固定され
る。 The nozzle configured as described above is joined to the tip of a gun body 11 equipped with an on-off valve 10 via a packing 12, and is attached to a hub nut 13 that is engaged with a collar 5 of a case 2.
By screwing into the gun body 11, the introduction hole 3
is aligned and fixed to the discharge hole 14 of the on-off valve 10.
そして、開閉弁１０が開弁すると、図示しない
ポンプによつて高圧力に加圧された液体塗料が吐
出孔１４から導入孔３内に流入し、２対の噴孔７
ａ，７ａと７ｂ，７ｂから棒状の液柱となつて空
気中に噴出し、各１対の塗料流が点Ｐで互いに衝
突して薄い液膜となつた後、空気との摩擦により
微粒化して扇形の噴射パターンで幅を拡げつつ進
行し、被塗装物に塗着するのである。 Then, when the on-off valve 10 opens, liquid paint pressurized to high pressure by a pump (not shown) flows into the introduction hole 3 from the discharge hole 14, and the two pairs of injection holes 7
A, 7a and 7b, 7b eject into the air as rod-shaped liquid columns, and each pair of paint streams collide with each other at point P to form a thin liquid film, which is then atomized by friction with the air. The spray spreads in a fan-shaped spray pattern while expanding in width, and coats the object to be coated.
しかるに、本実施例においては、２対の噴孔７
ａ，７ａ，７ｂ，７ｂが、Ｖ溝４の谷底と導入孔
３の軸線を含む平面を中心とする対称形をなして
形成され、かつ、一方の対の噴孔７ａ，７ａの軸
線を含む平面と、他方の対の噴孔７ｂ，７ｂの軸
線を含む平面との間隔が前方に向つて拡開してい
るから、第２図に示すように、各１対の塗料流は
互いに外側を向き、霧化点の前方で重なり合う。
このため、一対の噴孔から塗料を噴射した場合に
比べて塗料流が広角度に拡開し、かつ、中央部に
おいては、両側の扇形の塗料が流が重なり合い、
両縁部に比べて流量が大きくなる。したがつて、
被塗装面ａに塗着した塗膜ｃは、第５図に示すよ
うに、全体として幅が広く、しかも、中央部が厚
く、両側に向つて次第に薄くなり、両側の縁部を
少しずつ重ねながら塗装する場合に、均一な膜厚
が得られるのである。 However, in this embodiment, two pairs of nozzle holes 7
a, 7a, 7b, 7b are formed symmetrically with respect to a plane that includes the bottom of the V-groove 4 and the axis of the introduction hole 3, and also includes the axis of one pair of nozzle holes 7a, 7a. Since the distance between the plane and the plane containing the axes of the other pair of nozzle holes 7b, 7b widens toward the front, each pair of paint streams are directed outward from each other, as shown in FIG. direction, overlap in front of the atomization point.
Therefore, compared to when paint is injected from a pair of nozzle holes, the paint flow spreads out at a wider angle, and in the center, the fan-shaped paint flows on both sides overlap.
The flow rate is larger than that at both edges. Therefore,
As shown in Figure 5, the coating c applied to the surface to be coated a has a wide width as a whole, and is thicker in the center, gradually becoming thinner toward both sides, and gradually overlaps the edges on both sides. Even when painting, a uniform film thickness can be obtained.
本実施例のノズルを用いて、粘度100cpsの液体
塗料を60Kg／cm2の圧力で噴射したところ、塗料の
粒子は10〜50ミクロンの範囲に分布し、良好に微
粒化することが確認された。 When a liquid paint with a viscosity of 100 cps was sprayed at a pressure of 60 kg/cm 2 using the nozzle of this example, it was confirmed that the paint particles were distributed in the range of 10 to 50 microns and were well atomized. .
また、第２図に示す塗料流の広がり角αは、噴
孔７が１対の場合に約60度であつたのが、約120
度に拡大した。 In addition, the spread angle α of the paint flow shown in FIG. 2 was approximately 60 degrees when there was one pair of nozzle holes 7, but it was approximately 120 degrees.
Expanded.
なお、使用する塗料の粘度等の条件によつて異
なるが、良好に微粒化するには、噴孔７の短径が
0.1〜0.5mmとするのが最適であることが確認され
ており、また、噴孔７ａ，７ａ，７ｂ，７ｂから
点Ｐまでの距離が長すぎると、開口から噴出した
棒状の液柱から100ミクロン以上の粗大な粒子が
分離し、この粗大粒子は互いに衝突しても微粒化
せず、そのまま被塗装物に塗着して塗装面が粗雑
になるため、各１対の噴孔７ａ，７ａと７ｂ，７
ｂから点Ｐまでの距離は５mm以下にする必要があ
り、さらに、各１対の噴孔７ａ，７ａ，７ｂ，７
ｂの軸線同士の交角は大きいほど激しく衝突して
微粒化が促進され、衝突後に扇形に広がる塗料流
の広がり角も大になるのであるが、大きすぎると
逆流してノズルに付着するので、30度乃至90度の
範囲にするのが好ましいことが実験的に確認され
た。 Although it varies depending on conditions such as the viscosity of the paint used, in order to achieve good atomization, the short diameter of the nozzle hole 7 must be
It has been confirmed that 0.1 to 0.5 mm is optimal, and if the distance from the nozzle holes 7a, 7a, 7b, 7b to point P is too long, 100 mm will be lost from the rod-shaped liquid column spouted from the opening. Coarse particles of micron size or larger are separated, and even if these coarse particles collide with each other, they do not become atomized, but instead are applied to the object to be coated, resulting in a rough painted surface. and 7b, 7
The distance from b to point P must be 5 mm or less, and each pair of nozzle holes 7a, 7a, 7b, 7
The larger the intersection angle between the axes of b, the more violently they collide, promoting atomization, and the wider the spread angle of the fan-shaped paint flow after the collision, but if it is too large, it will flow backwards and adhere to the nozzle, so 30 It has been experimentally confirmed that it is preferable to set the angle between 90 degrees and 90 degrees.
上記実施例によつて具体的に説明したように、
本発明のエアレス塗装用ノズルは、後面に導入孔
を形成したボデイの前面に、同一平面を中心とす
る対称形をなして前記導入孔に達する２個を１対
とする２対の噴孔を、対をなす２個の噴孔の軸線
同士が各開口から５mmの点において30度乃至90度
の角度で互いに交差し、かつ、各１対の噴孔の軸
線を含む２の平面の間隔が前方に向つて拡開する
ように形成したことを要旨とするものであつて、
噴孔から噴出した直後の、粗大粒子が分離しない
状態において棒状の塗料流同士が衝突するから、
粗大粒子を生ずることなく良好な微粒化が行なわ
れ、単孔のノズルと同程度の大きさにすることが
できるから、スプレイガンが小型軽量化され、操
作性を向上することができ、単孔ノズルを使用す
る一般のエアレススプレイガンにそのまま装着す
ることも可能となる効果を奏し、さらに、衝突後
に扇形に広がる塗料流の広がり角がり角が大き
く、しかも、塗膜の厚さが中心部から両側の縁部
に向つて次第に減少するため、重ね塗りによる膜
厚の不均一が小さく、広い面積を能率よく、平滑
に塗装することができる効果を奏する。 As specifically explained in the above embodiment,
The airless painting nozzle of the present invention has two pairs of nozzle holes formed on the front surface of a body having an introduction hole formed on the rear surface, two pairs of nozzle holes that are symmetrical about the same plane and reach the introduction hole. , the axes of the two nozzle holes in the pair intersect with each other at an angle of 30 degrees to 90 degrees at a point 5 mm from each opening, and the distance between the two planes containing the axes of each pair of nozzle holes is The gist is that it is formed to expand toward the front,
Immediately after ejecting from the nozzle hole, the rod-shaped paint streams collide with each other without separating the coarse particles.
Good atomization is achieved without producing coarse particles, and the nozzle can be made to the same size as a single-hole nozzle, making the spray gun smaller and lighter and improving operability. It has the effect of being able to be installed as is in a general airless spray gun that uses a nozzle, and furthermore, the paint flow that spreads out in a fan shape after collision has a large spread angle, and the thickness of the paint film is small from the center. Since it gradually decreases toward the edges on both sides, non-uniformity in film thickness due to overcoating is small, and a wide area can be coated efficiently and smoothly.
第１図は、本発明の一実施例の断面図、第２図
は、第１図Ａ−Ａ線断面図、第３図は、正面図、
第４，５図は、厚さを誇張して表わした塗膜の断
面図であつて、第４図は、噴孔が１対の場合、第
５図は本実施例の場合を示す。
１：ボデイ、２：ケース、３：導入孔、６：チ
ツプ、７ａ，７ｂ：噴孔、Ｐ：交点。
FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. 3 is a front view.
4 and 5 are cross-sectional views of the coating film with the thickness exaggerated. FIG. 4 shows the case where there is one pair of nozzle holes, and FIG. 5 shows the case of this example. 1: Body, 2: Case, 3: Introduction hole, 6: Chip, 7a, 7b: Nozzle hole, P: Intersection.
Claims (1)
一平面を中心とする対称形をなして前記導入孔に
達する２個を１対とする２対の噴孔を、対をなす
２個の噴孔の軸線同士が各開口から５mmの点にお
いて30度乃至90度の角度で互いに交差し、かつ、
各１対の噴孔の軸線を含む２の平面の間隔が前方
に向つて拡開するように形成したことを特徴とす
るエアレス塗装用ノズル。1. Two pairs of nozzle holes are installed on the front surface of the body, which has an introduction hole formed on the rear surface, in a symmetrical shape centered on the same plane and reach the introduction hole. The axes of the holes intersect each other at an angle of 30 degrees to 90 degrees at a point 5 mm from each opening, and
An airless painting nozzle characterized in that the interval between two planes including the axes of each pair of nozzle holes widens toward the front.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8234083A JPS59206065A (en) | 1983-05-10 | 1983-05-10 | Nozzle for airless painting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8234083A JPS59206065A (en) | 1983-05-10 | 1983-05-10 | Nozzle for airless painting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS59206065A JPS59206065A (en) | 1984-11-21 |
| JPS6355988B2 true JPS6355988B2 (en) | 1988-11-07 |
Family
ID=13771831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8234083A Granted JPS59206065A (en) | 1983-05-10 | 1983-05-10 | Nozzle for airless painting |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59206065A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007500595A (en) * | 2003-05-14 | 2007-01-18 | メスベン リミテッド | Method and apparatus for generating droplet sprays |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2543398B2 (en) * | 1988-09-09 | 1996-10-16 | アロイ工器株式会社 | Spray nozzle for painting |
| EP2227336B1 (en) * | 2007-12-05 | 2014-06-04 | Wagner Spray Tech Corporation | Dual aperture spray tip cup gun |
| CN109317328B (en) * | 2018-10-19 | 2020-09-08 | 东海县常春门窗有限公司 | Rotary pressurizing glue gun based on door frame joint filling depth |
-
1983
- 1983-05-10 JP JP8234083A patent/JPS59206065A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007500595A (en) * | 2003-05-14 | 2007-01-18 | メスベン リミテッド | Method and apparatus for generating droplet sprays |
| JP4847330B2 (en) * | 2003-05-14 | 2011-12-28 | メスベン リミテッド | Method and apparatus for generating droplet sprays |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS59206065A (en) | 1984-11-21 |
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