JP4283921B2 - Color change coating system - Google Patents

Color change coating system Download PDF

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Publication number
JP4283921B2
JP4283921B2 JP32063198A JP32063198A JP4283921B2 JP 4283921 B2 JP4283921 B2 JP 4283921B2 JP 32063198 A JP32063198 A JP 32063198A JP 32063198 A JP32063198 A JP 32063198A JP 4283921 B2 JP4283921 B2 JP 4283921B2
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JP
Japan
Prior art keywords
paint
color
coating system
nozzle
gun
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Expired - Fee Related
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JP32063198A
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Japanese (ja)
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JP2000140718A (en
Inventor
宗治 大本
徹 竹内
正司 浜
展久 戸田
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Kansai Paint Co Ltd
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Kansai Paint Co Ltd
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Filing date
Publication date
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Priority to JP32063198A priority Critical patent/JP4283921B2/en
Publication of JP2000140718A publication Critical patent/JP2000140718A/en
Application granted granted Critical
Publication of JP4283921B2 publication Critical patent/JP4283921B2/en
Anticipated expiration legal-status Critical
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  • Spray Control Apparatus (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、2種以上の塗料を別々に吐出して、これを外部で混合させて塗装する塗装機を用いて、短時間で塗料の色替えが可能で、計量調色と塗装を同時に行ない得る色替え塗装システムに関する。
【0002】
【従来技術及びその課題】
従来、有色塗料の塗装は、グレ−色等のベ−ス塗料に対して赤や青の原色のカラ−塗料を目的の色味となるよう一定比率で計量し、これらをタンク内にて混合して調色を行なった後、該調色済塗料を塗装機に送って塗装に供していた。
【0003】
しかしながら、この場合にベ−ス塗料とカラ−塗料を貯蔵タンクから一定比率で搬送・計量し、さらに混合を行なう自動計量混合装置は、設備費が高く、制御システム装置も大きく設置場所を広く確保する必要があった。またタンク容量も大きくする必要があり、色替え時に不要になった塗料を多量に廃却せざるおえず、またタンク洗浄には多量の有機溶剤を要していた。
【0004】
そこで混合装置を使用することなく、それぞれの貯蔵タンクから塗装ガン等への供給経路にスタティックミキサ等を配設して塗料供給の過程で混合を行なうなども提案されているが、ベ−ス塗料に対するカラ−塗料の混合量がごく少量である場合には、2液の流量や混合圧などの調整が難しく混合比がばらつき、また均一で良好な混合状態が得られ難かった。
【0005】
本発明の目的は、ベ−ス塗料及びカラ−塗料の計量混合を予め行なうことなく、塗装時に計量混合を同時に行ない、設備費の節減だけでなく色替え時の塗料ロスを低減できる色替え塗装システムを提供することにある。
【0006】
【課題を解決するための手段】
即ち本発明は、2つ以上の二流体ノズルと、加圧ノズルとを組み合わせて一体とした塗装ガンと、該2つ以上の二流体ノズルにカラ−チェンジバルブユニットを介して2色以上のカラ−塗料のいずれか1色のカラ−塗料を選択供給する第一の供給装置と、該加圧ノズルにベ−ス塗料を供給する第二の供給装置とを具備する塗装システムであって、前記塗装ガンの中心に前記加圧ノズルを配置し、その周囲に前記二流体ノズルを2つ以上配し、供給されたカラ−塗料とベ−ス塗料を各ノズルで微粒化し、各スプレ−パタ−ン同志を飛行中及び被塗物面上で混合させながら混色塗膜を形成することを特徴とする塗料の色替え塗装システムに関する。
【0007】
【発明の実施の形態】
本発明で使用される塗装機は、塗装ガンの中心に加圧ノズルを配置し、その周囲に二流体ノズルを2つ以上配されるものが好適である。該加圧ノズルは、ノズルチップの種類に特に制限なく広範囲に選択できる。二流体ノズルは、加圧ノズルチップの周囲に塗料吐出口及び霧化エア噴出口を順次配置させ、その塗料吐出口は、連続した円周状にしたり、塗料ごとに複数口設けるなどの吐出形態を適宜選択できる。霧化エア噴出口は、配設位置・方向、配設個数も適宜選択でき、圧縮空気圧や空気量は、上記ノズルチップによるエアレス塗装側のパタ−ン巾に応じて混色に最適量に調整される。また本発明では、パタ−ン調節用空気を併用してもよい。該パタ−ン調節用空気の噴出口は、通常、二流体ノズルの外周に設けられる。該パタ−ン調節用空気によって霧化混合状態にある各霧化粒子のパタ−ンを制御するものである。
【0008】
本発明の塗装システムでは、上記二流体ノズルにカラ−チェンジバルブユニットを介して2色以上のカラ−塗料を選択供給する第一の供給装置と、上記加圧ノズルにベ−ス塗料を供給する第二の供給装置とを設けてなる。各供給装置では、各タンクに別々に貯溜された各塗料を夫々のポンプにより配管を通じて各ノズルに圧送される。夫々の塗料吐出のON/OFFは、エア電磁バルブで作動する塗料ニ−ドルの開閉によって行なわれ、夫々の吐出量は別々に目的とする塗色によって制御される。霧化空気噴出のON/OFFは、エア用電磁バルブによって行なわれる。
【0009】
本発明では、各供給装置から供給されたカラ−塗料とベ−ス塗料を各ノズルで微粒化し、各スプレ−パタ−ン同志を飛行中及び被塗物面上で混合させながら混色塗膜を形成する。カラ−塗料は、二流体ノズルにおいて、その吐出量がベ−ス塗料の吐出量に対して必要な一定比率になるように設定されてエア霧化される。またベ−ス塗料は、加圧ノズルにおいて、必要吐出量が得られるようにエアレス圧力及びエアレスチップを選択されて液霧化される。ベ−ス塗料及びカラ−塗料の希釈粘度は、100mPa・s以下、好ましくは20〜50mPa・sに調整されることが望ましい。該粘度が100mPa・sを越えると両者の霧化粒子が混合しにくく均一な塗色が得られない場合がある。
【0010】
【実施例】
図1は、本発明の塗装システムの一実施例の示す説明図であり、図2は本発明で使用される塗装ガンの正面図である。
【0011】
図1では、塗装ガン1に各塗料タンク11、12、13からポンプ14、14´により各塗料が供給される。カラ−塗料は、カラ−チェンジバルブ10により塗料タンク12、13のいずれかに切り替えられて供給される。カラ−チェンジバルブ10による切り替えはコントロ−ラ−9によって行なわれる。該カラ−塗料のタンクは必要塗色によって増設可能である。
【0012】
塗装ガン1は、図2の通り、エアレスチップ2の吐出口が中央に位置し、その外周に二流体ノズルの霧化エア噴出口3及び塗料吐出口3´が配され、これらはエアキャップで囲まれている。
【0013】
夫々の塗料吐出のON/OFFは、エア電磁バルブ6、7、7´で作動する塗料ニ−ドル弁4、4´、5の開閉によって行なわれ、夫々の吐出量はコントロ−ラ−9によって制御される。霧化エア噴出のON/OFFは、エア電磁バルブ8によって行なわれる。該噴出量もコントロ−ラ−9によって制御される。
【0014】
上記塗装ガンとして、「エア−アシストガン」(アネスト岩田社製、外部混合式)を用いて、ベ−ス塗料として「SDジンク1000HAグレ−」(関西ペイント社製、防食塗料、粘度30mPa・s)を使用し、カラ−塗料として赤錆色カラ−ペ−スト(関西ペイント社製、粘度25mPa・s)を使用し塗装を行なった。エアレスチップは、「163−919」(日本グレ−社製)を使用し、エアレス圧力80〜120kg/cm2 、吐出量1200cc/分の条件にてベ−ス塗料をエアレス塗装した。カラ−塗料は霧化エア噴出口3の手前で霧化エアと混合して微粒化され吐出される。その条件は、二流体ノズルの霧化エア圧1.0〜4.0kg/cm2 、吐出量50〜200cc/分として、カラ−塗料を霧化塗装した。ベ−ス塗料粒子とカラ−塗料粒子は、ノズル近傍で霧化混合し、塗着時には適正な色味を有する塗膜が得られた。両粒子の混合性は良好であった。
【0015】
ここで赤錆色のカラ−塗料を他タンク(緑色)のカラ−塗料に色替えする場合は、カラ−チェンジバルブ10から塗装ガン1のガン先である塗料吐出口3までを瞬時で洗浄した(洗浄機構は図示せず)後、他タンク(緑色)のカラ−塗料を該塗料吐出口3まで圧送・充填して色替えが完了する。洗浄及び色替え時間は、わずか約15秒であった。色替え時の塗料ロスは、カラ−チェンジバルブ10から塗装ガン1のガン先である塗料吐出口3までの配管内にあった量のみであるため、約50〜100cc/分程度の少量であった。
【0016】
【発明の効果】
本発明によれば、短時間で塗料の色替えが可能で、計量調色と塗装を同時に行ない得る色替え塗装システムが提供でき、外部混合方式により、2液の混合比率を安定させることができ、色替え時の塗料ロスがなくなり、設備投資・製造コストが低減される。
【図面の簡単な説明】
【図1】本発明の塗装システムの一実施例の示す説明図である。
【図2】本発明で使用される塗装ガンの正面図である。
【符号の説明】
1 塗装ガン
2 エアレスチップ
3 霧化エア噴出口
3´塗料吐出口
4、4´ ニ−ドル弁(カラ−塗料用)
5 ニ−ドル弁(ベ−ス塗料用)
6 ニ−ドル制御用エア電磁バルブ(ベ−ス塗料用)
7、7´ ニ−ドル制御用エア電磁バルブ(カラ−塗料用)
8 霧化エア用電磁バルブ
9 コントロ−ラ−
10 カラ−チェンジバルブ
11 ベ−ス塗料タンク
12 カラ−塗料タンク(赤錆色)
13 カラ−塗料タンク(緑色)
14、14´ 塗料ポンプ
[0001]
BACKGROUND OF THE INVENTION
The present invention can change the color of paint in a short time using a coating machine that discharges two or more kinds of paints separately, mixes them outside, and paints them. The invention relates to a color change coating system to obtain.
[0002]
[Prior art and its problems]
Conventionally, colored paints are measured at a fixed ratio of red and blue color paints to a target color with respect to base paints such as gray, and these are mixed in a tank. After toning, the toned paint was sent to a coating machine for coating.
[0003]
However, in this case, the automatic metering and mixing device that transports and weighs the base paint and the color paint from the storage tank at a constant ratio and further mixes them has high equipment costs, and the control system device is large and a large installation space is secured. There was a need to do. In addition, it is necessary to increase the tank capacity, and it is necessary to dispose of a large amount of paint that has become unnecessary when changing colors, and a large amount of organic solvent is required for cleaning the tank.
[0004]
Therefore, it has been proposed to install a static mixer or the like in the supply path from each storage tank to a coating gun or the like without using a mixing device, and to mix in the process of supplying paint. When the amount of the color paint to be mixed was very small, it was difficult to adjust the flow rate and mixing pressure of the two liquids, and the mixing ratio varied, and it was difficult to obtain a uniform and good mixing state.
[0005]
The object of the present invention is to perform color-changing coating that does not preliminarily measure and mix base paint and color paint, but simultaneously performs metering and mixing at the time of painting, reducing not only equipment cost but also paint loss at the time of color change. To provide a system.
[0006]
[Means for Solving the Problems]
That is, the present invention relates to a paint gun in which two or more two-fluid nozzles and a pressure nozzle are combined, and two or more two-fluid nozzles with two or more colors via a color change valve unit. A coating system comprising: a first supply device that selectively supplies a color paint of any one of the paints; and a second supply device that supplies a base paint to the pressure nozzle, The pressurizing nozzle is arranged at the center of the coating gun, and two or more two-fluid nozzles are arranged around it, and the supplied color paint and base paint are atomized by each nozzle, The present invention relates to a paint color changing coating system characterized in that a mixed color coating film is formed while mixing each other in flight and on the surface of an object to be coated.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The coating machine used in the present invention is preferably one in which a pressure nozzle is disposed at the center of the coating gun and two or more two-fluid nozzles are disposed around the pressure nozzle. The pressure nozzle can be selected over a wide range without any particular limitation on the type of nozzle tip. In the two-fluid nozzle, a paint discharge port and an atomizing air jet outlet are sequentially arranged around the pressure nozzle tip, and the paint discharge port has a continuous circumferential shape or a discharge mode such as providing a plurality of ports for each paint. Can be appropriately selected. The position and direction of the atomizing air outlet and the number of nozzles can be selected as appropriate, and the compressed air pressure and the amount of air are adjusted to the optimum amount for color mixing according to the pattern width on the airless coating side by the nozzle tip. The In the present invention, pattern adjusting air may be used in combination. The pattern adjusting air outlet is usually provided on the outer periphery of the two-fluid nozzle. The pattern of each atomized particle in the atomized and mixed state is controlled by the pattern adjusting air.
[0008]
In the coating system of the present invention, a first supply device that selectively supplies color paints of two or more colors to the two-fluid nozzle via a color change valve unit, and base paint is supplied to the pressure nozzle. And a second supply device. In each supply device, each paint separately stored in each tank is pumped to each nozzle through a pipe by a respective pump. Each paint discharge is turned on and off by opening and closing a paint needle that is operated by an air electromagnetic valve, and each discharge amount is controlled separately by a target paint color. Atomizing air ejection is turned on / off by an air solenoid valve.
[0009]
In the present invention, the color paint and base paint supplied from each supply device are atomized by each nozzle, and the mixed color coating film is formed while each spray pattern is mixed in flight and on the surface of the object to be coated. Form. The color paint is atomized in the two-fluid nozzle by setting the discharge amount to be a fixed ratio required for the base paint discharge amount. Also, the base paint is atomized by selecting an airless pressure and an airless tip so that a required discharge amount can be obtained in a pressure nozzle. The dilution viscosity of the base paint and the color paint is desirably adjusted to 100 mPa · s or less, preferably 20 to 50 mPa · s. If the viscosity exceeds 100 mPa · s, the atomized particles of both are difficult to mix and a uniform coating color may not be obtained.
[0010]
【Example】
FIG. 1 is an explanatory view showing an embodiment of a coating system of the present invention, and FIG. 2 is a front view of a coating gun used in the present invention.
[0011]
In FIG. 1, each paint is supplied to the paint gun 1 from each paint tank 11, 12, 13 by pumps 14, 14 ′. The color paint is switched to one of the paint tanks 12 and 13 by the color change valve 10 and supplied. Switching by the color change valve 10 is performed by the controller 9. The color paint tank can be expanded depending on the required paint color.
[0012]
As shown in FIG. 2, the coating gun 1 has a discharge port of an airless chip 2 located in the center, and an outer periphery thereof is provided with an atomizing air discharge port 3 and a paint discharge port 3 'of a two-fluid nozzle, which are air caps. being surrounded.
[0013]
The ON / OFF of each paint discharge is performed by opening and closing the paint needle valves 4, 4 'and 5 operated by the air electromagnetic valves 6, 7, and 7', and the respective discharge amounts are controlled by the controller 9. Be controlled. The atomizing air jet is turned on / off by the air electromagnetic valve 8. The ejection amount is also controlled by the controller 9.
[0014]
"Air-assisted gun" (manufactured by Anest Iwata Co., Ltd., external mixing type) is used as the coating gun, and "SD zinc 1000HA gray" (manufactured by Kansai Paint Co., Ltd., anticorrosive paint, viscosity 30 mPa.s) is used as the base paint. ) And red rust color paste (manufactured by Kansai Paint Co., Ltd., viscosity 25 mPa · s) as a color paint. As the airless tip, “163-919” (manufactured by Nippon Gray Co., Ltd.) was used, and the base paint was applied airlessly under the conditions of an airless pressure of 80 to 120 kg / cm 2 and a discharge amount of 1200 cc / min. The color paint is atomized by being mixed with the atomized air before the atomizing air outlet 3 and is discharged. The conditions were such that the atomizing air pressure of the two-fluid nozzle was 1.0 to 4.0 kg / cm 2 and the discharge amount was 50 to 200 cc / min. The base paint particles and the color paint particles were atomized and mixed in the vicinity of the nozzle, and a coating film having an appropriate color was obtained at the time of application. The mixing property of both particles was good.
[0015]
Here, when the color of the red rust color paint is changed to the color paint of the other tank (green), the color change valve 10 to the paint discharge port 3 which is the gun tip of the paint gun 1 is instantly washed ( After the cleaning mechanism (not shown), the color change is completed by feeding and filling the color paint in the other tank (green) to the paint discharge port 3. Washing and color change time was only about 15 seconds. The paint loss at the time of color change is only a small amount of about 50 to 100 cc / min because it is only the amount in the pipe from the color change valve 10 to the paint discharge port 3 which is the gun tip of the paint gun 1. It was.
[0016]
【The invention's effect】
According to the present invention, it is possible to provide a color change coating system that can change the color of a paint in a short time and can perform metering toning and painting at the same time, and can stabilize the mixing ratio of two liquids by an external mixing method. This eliminates paint loss when changing colors, reducing capital investment and manufacturing costs.
[Brief description of the drawings]
FIG. 1 is an explanatory view showing an embodiment of a coating system of the present invention.
FIG. 2 is a front view of a paint gun used in the present invention.
[Explanation of symbols]
1 Coating gun 2 Airless tip 3 Atomizing air outlet 3 'Paint outlet 4, 4' Needle valve (for color paint)
5 Needle valve (for base paint)
6 Air solenoid valve for needle control (for base paint)
7, 7 'Needle control air solenoid valve (for color paint)
8 Electromagnetic valve for atomizing air 9 Controller
10 Color change valve 11 Base paint tank 12 Color paint tank (red rust color)
13 Color paint tank (green)
14, 14 'paint pump

Claims (2)

2つ以上の二流体ノズルと、加圧ノズルとを組み合わせて一体とした塗装ガンと、該2つ以上の二流体ノズルにカラ−チェンジバルブユニットを介して2色以上のカラ−塗料のいずれか1色のカラ−塗料を選択供給する第一の供給装置と、該加圧ノズルにベ−ス塗料を供給する第二の供給装置とを具備する塗装システムであって、前記塗装ガンの中心に前記加圧ノズルを配置し、その周囲に前記二流体ノズルを2つ以上配し、供給されたカラ−塗料とベ−ス塗料を各ノズルで微粒化し、各スプレ−パタ−ン同志を飛行中及び被塗物面上で混合させながら混色塗膜を形成することを特徴とする塗料の色替え塗装システム。One of two or more two-fluid nozzles and a pressure gun, and a paint gun integrated with the two or more two-fluid nozzles via a color change valve unit . A coating system comprising a first supply device for selectively supplying a color paint of one color and a second supply device for supplying a base paint to the pressurizing nozzle, at the center of the paint gun The pressurizing nozzle is arranged, and two or more two-fluid nozzles are arranged around it. The supplied color paint and base paint are atomized by each nozzle, and each spray pattern is in flight. And a paint color-changing coating system, wherein a color-mixed coating film is formed while being mixed on the surface of the object to be coated. ベ−ス塗料及びカラ−塗料の希釈粘度が、100mPa・s以下である請求項1記載の色替え塗装システム。The color change coating system according to claim 1, wherein the base paint and the color paint have a diluted viscosity of 100 mPa · s or less.
JP32063198A 1998-11-11 1998-11-11 Color change coating system Expired - Fee Related JP4283921B2 (en)

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JP4283921B2 true JP4283921B2 (en) 2009-06-24

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US8708202B2 (en) * 2011-05-10 2014-04-29 Ppg Industries Ohio, Inc. Pressure canisters for automated delivery of coating compositions
CN107999302B (en) * 2017-12-27 2024-06-11 上海格拉曼国际消防装备有限公司 Spraying device for multicomponent reactive pressing agent

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