JP3258456B2 - Painting method - Google Patents
Painting methodInfo
- Publication number
- JP3258456B2 JP3258456B2 JP15928093A JP15928093A JP3258456B2 JP 3258456 B2 JP3258456 B2 JP 3258456B2 JP 15928093 A JP15928093 A JP 15928093A JP 15928093 A JP15928093 A JP 15928093A JP 3258456 B2 JP3258456 B2 JP 3258456B2
- Authority
- JP
- Japan
- Prior art keywords
- coating
- steel strip
- organic solvent
- nozzle
- web
- 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
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
- B05C5/0245—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work for applying liquid or other fluent material to a moving work of indefinite length, e.g. to a moving web
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Coating Apparatus (AREA)
Description
【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION
【0001】[0001]
【産業上の利用分野】本発明は連続走行する鋼帯(以下
「ウエブ」という)の塗装面に連続的に塗膜を形成する
塗装方法、特にウエブの幅方向にスリット状の開口が形
成されたスリットノズルから吐出させた塗料液によっ
て、鋼帯塗装面に塗膜を形成する塗装方法に関する。The present invention relates to a continuously running steel strip ( hereinafter referred to as a steel strip).
"Web" coating method of forming a continuous coating on the coated surface of the called), in particular slit-shaped opening is shaped in the width direction of the web
The present invention relates to a coating method for forming a coating film on a steel strip coating surface by using a coating liquid discharged from a formed slit nozzle.
【0002】[0002]
【従来の技術】従来のウエブ塗装面に塗膜を形成するス
リット状ノズルコータでは、被塗装物であるウエブ塗装
面に同伴してくる空気が、塗膜下に巻込まれて塗膜に気
泡状の欠陥をもたらすために、特開昭62−18696
6号公報及び特開昭48−32923号公報に示される
ような対策が講じられていた。即ち、たとえば特開昭6
2−186966号公報においては、図7に示すよう
に、塗膜を形成する塗料液の溶剤に吸収され易い、例え
ばCO2 ガス等の気体を塗布直前にウエブ塗装面に吹き
つけ空気と置換している。即ち、図7において、101
は被塗装物であるウエブ、102はバックアップロー
ル、103はスリットノズル、104は塗料供給用ポン
プ、105は塗料液、106はスリットノズル103か
ら吹出される生塗膜、107はウエブ101に塗装後の
塗膜、108は減圧室、109はCO2 ガス等の空気置
換用気体を供給するガスノズル、110は減圧用ポンプ
をそれぞれ示す。BACKGROUND ART In scan <br/> slit-like Nozurukota forming a coating film on conventional web coating surface, web coating which is an object to be painting material
Air coming entrained to the surface it is, in order to bring the bubble-like defects on the coating film is caught under the coating film, JP 62-18696
6 and JP-A-48-32923 have taken measures. That is, for example,
In Japanese Patent Application Laid-Open No. 2-186966, as shown in FIG. 7, a gas such as CO 2 gas, which is easily absorbed by a solvent of a coating liquid for forming a coating film, is sprayed onto a web coating surface immediately before coating.
Replaced with soaking air. That is, in FIG.
The web which is an object to be painting was 102 bar click up roll, 103 is a slit nozzle, 104 paint supply pump, 105 Coating Solution, 106 Namanurimaku blown out from the slit nozzle 103, 107 is coated on the web 101 A later coating film, 108 is a decompression chamber, 109 is a gas nozzle for supplying air replacement gas such as CO 2 gas, and 110 is a decompression pump.
【0003】図において、ウエブ101塗装面に同伴さ
れてくる空気層を減圧室108により、ある程度ウエブ
101塗装面から剥離させたのち、生塗膜106に吸収
され易いCO2 ガス等の気体をガスノズル109から吹
出して、生塗膜106のウエブ101への接触部111
では、このCO2 ガス等の供給気体で空気層を置換する
ようにしている。[0003] In Figure, the vacuum chamber 108 an air layer coming entrained to the web 101 coated surface, to some extent the web
After the coating film 101 is peeled off from the painted surface, a gas such as CO 2 gas which is easily absorbed by the raw coating film 106 is blown out from the gas nozzle 109, and the contact portion 111 of the raw coating film 106 to the web 101
Then, the air layer is replaced with the supply gas such as the CO 2 gas.
【0004】[0004]
【発明が解決しようとする課題】上記従来のウエブの塗
装方法には解決すべき次の課題があった。The above conventional web coating method has the following problems to be solved.
【0005】即ち、特開昭62−186966号公報の
方法においては、上述の通り走行してくるウエブに同伴
される空気の塗膜への巻込み現象を防止するために、塗
料の溶剤に吸収され易い気体(例えばCO2 ガス)によ
って同伴空気を置換しているが、この置換気体も気相層
厚にして約10μm程度は塗膜下に巻込まれることにな
るので、塗膜厚が薄い場合には、塗料液中の溶剤に吸収
しきれないで、一部は残留して気泡欠陥を生ずるという
問題がある。Namely, in the method of JP 62-186966, in order to prevent the entrainment phenomenon of the coating film of air entrained in the web coming traveling as described above, the absorption solvent of the paint Although the entrained air is replaced by a gas (e.g., CO 2 gas) which is easily removed, this replacement gas is also caught under the coating by about 10 μm in gas phase layer thickness. the, not be absorbed in a solvent of paint liquid and partly there is a problem that results in a bubble defect remained.
【0006】又、特開昭48−32923号公報の方法
においては、水又は溶剤の蒸気と空気との混合ガスをウ
エブの塗装面に吹き付けて、その塗装面の水又は溶剤を
凝縮させ、塗料液との濡れ性を改善することによって、
空気巻込みによる気泡欠陥を生じ難くしているが、同伴
空気の置換を水又は溶剤の蒸気と空気との混合ガスにて
行っているので、水又は溶剤蒸気が凝縮する際に、空気
を巻込む危険性があり、塗膜の空気泡巻込みによる欠陥
を生ずる危険性がある。[0006] Further, in the method of JP-A-48-32923, by blowing a mixed gas of steam and air in water or solvent to the web of the painting surface, condensed water or solvent of the coated surface, By improving the wettability with the coating liquid ,
Air bubbles are less likely to occur due to entrainment of air, but the entrained air is replaced with a mixed gas of water or solvent vapor and air. And there is a risk of causing defects due to entrainment of air bubbles in the coating.
【0007】又、同公報に示された方法においては、ウ
エブ塗装面に凝縮させる液膜厚を調整するために、ウエ
ブ塗装面の温度、蒸発用の液温及び吸引空気の温度の各
々を調整しているが、3種類の温度を調整せねばならぬ
ので、作業が繁雑になるという問題がある。[0007] Also, Oite the method shown in this publication, in order to adjust the liquid film thickness to condense on the web coated surface, the temperature of the web coated surface, each of the temperature of the liquid temperature and the suction air for evaporation However, since three types of temperatures have to be adjusted, there is a problem that the operation becomes complicated.
【0008】本発明は上記不具合を解消するため、ウエ
ブ塗装面の空気を殆ど完全に駆除して後、ウエブ塗装面
の塗装を行なうようにした塗装方法を提供することを目
的とする。[0008] Since the present invention is to solve the above problems, weather
After almost complete removal of the air of the probe painted surface, the web coated surface
An object of the present invention is to provide a coating method for performing coating of a coating.
【0009】[0009]
【課題を解決するための手段】本発明は上記課題の解決
手段として次の(1),(2)に記載の塗装方法を提供
しようとするものである。The object of the present invention is to provide a coating method described in the following (1) and (2) as means for solving the above-mentioned problems.
【0010】(1)連続走行する鋼帯の塗装面にスリッ
トノズルを対向配置し、鋼帯の幅方向に開口させた前記
スリットノズルのノズルより吐出される塗料液を鋼帯塗
装面に任意厚みで塗布する塗装方法において、前記スリ
ットノズルの上流側に設置されたノズルから加熱手段に
より加熱されガス状になった温度−蒸気圧特性の異なる
複数の有機溶剤の混合蒸気を前記鋼帯塗装面に吹きつけ
て接触、凝縮させたのち、上記スリットノズルから塗料
液を鋼帯塗装面に吐出し塗布することを特徴とする塗装
方法。(1) Slip the painted surface of the steel strip running continuously.
The door nozzle placed opposite, strip coating a paint solution in the width direction of the steel strip Ru discharged from the nozzle of the <br/> slit nozzle is open mouth
In the coating method of coating an arbitrary thickness instrumentation surface, said Sri
The heating means from the installed nozzle on the upstream side of Tsu bets nozzle
Heated and gaseous temperature-vapor pressure characteristics differ
Spraying a mixed vapor of multiple organic solvents onto the steel strip painted surface
After contacting and condensing, paint from the slit nozzle
A coating method characterized by discharging and applying a liquid to a steel strip coating surface .
【0011】(2)請求項1記載の塗装方法において、
前記ノズルの設置位置より更に上流側に吸引手段を設
け、該吸引手段により走行する鋼帯塗装面に随伴する空
気層を吸引させることを特徴とする塗装方法。(2) In the coating method according to claim 1,
A suction means is provided further upstream from the installation position of the nozzle.
Only, painting wherein the cause Aspirate the air layer entrained to the steel strip coated surface which runs by the suction means.
【0012】[0012]
【作用】本発明は上記のように構成されるので次の作用
を有する。The present invention is configured as described above and has the following effects.
【0013】(1)上記(1)の構成にあっては、鋼帯
に塗料液を吐出して塗布するスリッ トノズルの設置位置
より上流側を走行する鋼帯の塗装面に、加熱手段として
のヒータで加熱されガス状にされた、有機溶剤の混合蒸
気を接触、凝縮させたのち、上記スリットノズルから塗
料液を吐出して塗膜の形成を行なうので、2種類以上の
温度に対して蒸気圧が異なる、所謂,温度−蒸気圧特性
の異なる有機溶剤の混合ガス(蒸気)により鋼帯の塗装
面には、予め有機溶剤が凝縮して、液膜が形成され、塗
料液と鋼帯塗装面との濡れ性が高められ、空気を駆逐す
ると共に、自からも気体として残らないので、塗膜に気
泡が混入しない。[0013] (1) In the configuration (1), the installation position of the slit bets nozzle for applying to discharge the paint liquid to the steel strip <br/>
Painted surfaces of the steel strip to more traveling on upstream side, as the heating means
Is heated by a heater which is in gaseous contact with mixed vapor of an organic solvent, after condensed, coating from the slit nozzle
The coating liquid is discharged to form a coating film .
So-called temperature-steam pressure characteristics where the steam pressure differs with temperature
Of the coated surface of the steel strip with a mixed gas (vapor) in different organic solvents, in advance an organic solvent is condensed, the liquid film is formed, the coating
Postal liquid and wettability between the steel strip coated surface is increased, as well as expel the air, since not remain as a gas from itself, air bubbles are not mixed into the coating film.
【0014】(2)上記(2)の構成にあっては上記
(1)の構成に加え、鋼帯塗装面に有機溶剤の混合ガス
を吐出し接触、凝縮させる部位よりも更に上流側に吸引
手段を設け、鋼帯塗装面に随伴する空気層を吸引するよ
うにしているので、上記(1)の作用に加え、塗膜に気
泡の混入する機会が一層減る。(2) In the configuration of the above (2), in addition to the configuration of the above (1), the mixed gas of the organic solvent is discharged to the steel strip coating surface , and is sucked further upstream from a portion where the mixed gas is contacted and condensed.
The means provided to the intake pull the air layer to accompany the steel strip coated surface
Therefore, in addition to the effect of the above (1), the chance of air bubbles entering the coating film is further reduced.
【0015】[0015]
【実施例】本発明の方法の第1、第2実施例を図1〜図
6により説明する。なお、従来例ないしは先の実施例に
用いた装置と同様の装置及び部材には同符号を付し、必
要ある場合を除き、説明を省略する。また、先の実施例
と同様の方法についても、必要ある場合を除き説明を省
略する。DESCRIPTION OF THE PREFERRED EMBODIMENTS First and second embodiments of the method of the present invention will be described with reference to FIGS. In addition, the same reference numerals are given to the same devices and members as those used in the conventional example or the previous embodiment, and the description will be omitted unless necessary. Further, the description of the same method as that of the previous embodiment will be omitted unless necessary.
【0016】(第1実施例) 請求項1発明の塗装方法に係る第1実施例を図1〜図3
により説明する。(First Embodiment) FIGS. 1 to 3 show a first embodiment according to the coating method of the present invention.
This will be described below.
【0017】図1は本実施例の方法に用いるウエブ塗装
面に塗装を施す塗装装置の模式的側断面図、図2は図1
のスリットノズル3、有機溶剤ガス供給室7近傍の拡大
図、図3は本実施例の塗装装置で用いる各有機溶剤の温
度−蒸気圧特性を示す線図である。FIG. 1 is a schematic side sectional view of a coating apparatus for coating a web coating surface used in the method of the present embodiment, and FIG.
FIG. 3 is an enlarged view of the vicinity of the slit nozzle 3 and the organic solvent gas supply chamber 7, and FIG. 3 shows the temperature of each organic solvent used in the coating apparatus of the present embodiment.
Degree - is a graph showing the vapor pressure properties.
【0018】図1、図2において、1は被塗装物のウエ
ブ(鋼帯)、2はウエブ1が塗装時に平坦にする必要が
あることから、この平坦度を確保するためのバックアッ
プロール、3はウエブ1塗装面に塗料液4を塗布するス
リットノズル、4は有機溶剤等を含有する塗装用の塗料
液、5はスリットノズル3から吐出される生塗膜、6は
ウエブ1に塗装後、生塗膜5が固化した塗膜、7は混合
された有機溶剤12,13の混合ガスをウエブ1に接触
させるための有機溶剤ガス供給室、7aは有機溶剤ガス
供給室7の壁、8は有機溶剤ガス供給室7に有機溶剤混
合ガスを供給するノズル、9は配管、10,11は有機
溶剤12,13をそれぞれ格納するためのタンク、1
2,13は有機溶剤ガス供給室7に供給され、ウエブ1
に接触して凝縮する各有機溶剤、14,15はそれぞれ
のタンク10,11に格納されている有機溶剤12,1
3を加熱してガス状の蒸気にするためのヒータ、16は
配管、17はそれぞれの有機溶剤12,13のガスを混
合するためのガス混合器、25は壁7a等に有機溶剤1
2,13のガスを凝縮させないためのヒータ、27は有
機溶剤12,13の薄膜である。[0018] In FIGS. 1 and 2, the web (steel strip) 1 is the painting product, 2 need web 1 is flattened at painting
Therefore , a backup roll for securing the flatness, 3 is a slit nozzle for applying the coating liquid 4 to the coating surface of the web 1, 4 is a coating liquid for coating containing an organic solvent or the like, and 5 is a slit nozzle 3 6 is a coated film obtained by solidifying the raw film 5 after coating on the web 1, 7 is an organic solvent gas for bringing the mixed gas of the mixed organic solvents 12 and 13 into contact with the web 1 A supply chamber, 7a is a wall of the organic solvent gas supply chamber 7, 8 is a nozzle for supplying an organic solvent mixed gas to the organic solvent gas supply chamber 7, 9 is a pipe, and 10 and 11 are for storing the organic solvents 12 and 13, respectively. Tank, 1
2 and 13 are supplied to the organic solvent gas supply chamber 7 and the web 1
The organic solvents 14 and 15 condensing upon contact with the organic solvents 12 and 1 stored in the tanks 10 and 11 respectively.
A heater for heating 3 to gaseous vapor ; 16 a pipe; 17 a gas mixer for mixing the gases of the respective organic solvents 12 and 13;
Heater for preventing condensation of the 2, 13 gas, 27 is a thin film of an organic solvent 12.
【0019】次に、以上のような構成の塗装装置を用い
て塗装する場合の第1実施例の塗装方法について説明す
る。Next, a description will be given of a coating method according to the first embodiment when coating is performed using the coating apparatus having the above-described configuration.
【0020】被塗装物のウエブ1は、その塗装面に空気
層を随伴した状態でバックアップロール2に巻付けられ
て、有機溶剤ガス供給室7に入る。有機溶剤ガス供給室
7内には、上述の通り温度−蒸気圧特性の異なる2種類
の有機溶剤12,13から成る混合ガスがガス供給用の
ノズル8から供給されており、ウエブ1の塗装面に、こ
の混合ガスが接触することにより、有機溶剤12,13
が凝縮し、図2に示す有機溶剤12,13の薄膜27を
ウエブ1塗装面に形成する。この有機溶剤12,13の
薄膜27を形成することにより、スリットノズル3から
供給される生塗膜5はウエブ1との濡れ性を良好に維持
できるので、空気を巻込むことなく塗膜6をウエブ1塗
装面上に形成することができる。The web 1 of the painting material is attached backup roll 2 wound while entrained air layer on the coated surface, into the organic solvent gas supply chamber 7. The organic solvent gas supply chamber 7, as the temperature of the above - mixed gas consisting of vapor pressure characteristics of two different types of organic solvent 12, 13 are supplied from a nozzle 8 for gas supply, painted surfaces of the web 1 And the organic solvent 12, 13
There condenses to form a thin film 27 of the organic solvent 12, 13 shown in FIG. 2 the web 1 coated surface. By forming the thin films 27 of the organic solvents 12 and 13, the raw coating film 5 supplied from the slit nozzle 3 can maintain good wettability with the web 1, so that the coating film 6 can be formed without involving air. One web coating
It can be formed on the mounting surface.
【0021】ところで、塗装前にウエブ1塗装面上に形
成される有機溶剤12,13の薄膜27の膜厚は重要
で、0.1〜10μmが適切である。即ち、膜厚が10
μm以上になると、溶剤の損失が大となり、又図示しな
い乾燥炉の負荷が大となる。逆に、膜厚が0.1μm以
下であると、局所的にウエブ1に薄膜27が付着してい
ない個所が存在することが実験的に判明している。[0021] Incidentally, the thickness of the thin film 27 of the organic solvent 12 and 13 before painting Ru is formed into web 1 coated surface on critical, 0.1 to 10 [mu] m is appropriate. That is, when the film thickness is 10
When the thickness is more than μm, the loss of the solvent increases, and the load on a drying furnace (not shown) increases. Conversely, it has been experimentally found that when the film thickness is 0.1 μm or less, there is a portion where the thin film 27 does not adhere to the web 1 locally.
【0022】従って、0.1〜10μmの有機溶剤1
2,13の凝縮した薄膜27を安定して得るには、事前
にウエブ1の塗装面温度を測定し、このウエブ1塗装面
温度に見合うように、ヒータ14、15による加熱を制
御して有機溶剤12,13の混合ガスの組成を調整する
ことにより、初めて可能となる。Therefore, 0.1 to 10 μm of organic solvent 1
In order to stably obtain the condensed thin film 27 of 2, 13, the coating surface temperature of the web 1 is measured in advance, and heating by the heaters 14, 15 is performed so as to match the coating surface temperature of the web 1. System
It becomes possible only by controlling the composition of the mixed gas of the organic solvents 12 and 13 by controlling the composition.
【0023】例えば、2種類の有機溶剤12,13とし
てアセトンとトルエンを使用する場合には有機溶剤12
としてアセトンを、有機溶剤13としてトルエンをそれ
ぞれタンク10及びタンク11に格納しておき、ヒータ
14及びヒータ15による加熱をそれぞれ調整すること
により、両有機溶剤12,13で構成する混合ガスの組
成を変える。For example, when acetone and toluene are used as the two kinds of organic solvents 12 and 13,
Is stored in the tank 10 and the tank 11 as the organic solvent 13, respectively, and the heating of the heater 14 and the heater 15 are respectively adjusted to adjust the composition of the mixed gas composed of the organic solvents 12 and 13. Change.
【0024】即ち、図3に示すように、アセトンとトル
エンとは温度−蒸気圧特性が異なり、一定の温度に対し
てアセトンは蒸気圧が高く、トルエンは蒸気圧が低いの
で、ウエブ1の塗装面温度が基準よりも高い場合には、
図1のヒータ14へのインプットを低減し、ヒータ15
へのインプットを増加することにより、混合ガス中のト
ルエン成分を増大し、基準温度の場合と同じ凝縮膜厚を
得ることができる。又、逆にウエブ1の塗装面温度が基
準よりも低い場合には、ヒータ14へのインプットを増
加し、ヒータ15へのインプットを低減することによ
り、混合ガス中のアセトン成分を増大して、基準温度の
場合と同じ凝縮膜厚を得ることができる。[0024] That is, as shown in FIG. 3, acetone and Torr
It has a different temperature-vapor pressure characteristic from E
Since acetone has a high vapor pressure and toluene has a low vapor pressure, if the coating surface temperature of the web 1 is higher than the standard,
The input to the heater 14 of FIG.
By increasing the input to the mixture, the toluene component in the mixed gas is increased, and the same condensed film thickness as at the reference temperature can be obtained. Conversely, when the coating surface temperature of the web 1 is lower than the reference, the input to the heater 14 is increased, and the input to the heater 15 is reduced, so that the acetone component in the mixed gas is increased. The same condensed film thickness as in the case of the reference temperature can be obtained.
【0025】尚、配管9,16、混合ガス供給用のノズ
ル8及び有機溶剤ガス供給室7を構成する壁7a及びス
リットノズル3の面に、有機溶剤12,13の混合ガス
が凝縮しないように、それらを約100℃以上に加熱し
ておく必要がある。ヒータ25は、そのために用いる。The mixed gas of the organic solvents 12 and 13 is prevented from condensing on the surfaces of the pipes 9 and 16, the nozzle 8 for supplying the mixed gas and the wall 7 a constituting the organic solvent gas supply chamber 7 and the slit nozzle 3. , They need to be heated above about 100 ° C. The heater 25 is used for that purpose.
【0026】前述の例は有機溶剤の混合蒸気としてアセ
トンとトルエンとから成る場合であるが、混合蒸気とし
てアセトン、トルエン及びキシレンのように3種類の温
度−蒸気圧特性が異なる有機溶剤から成る混合蒸気を使
用しても同じような作用、効果が得られる。The above-mentioned example is a case where acetone and toluene are used as a mixed vapor of an organic solvent. However, three kinds of temperature such as acetone, toluene and xylene are used as a mixed vapor.
The same operation and effect can be obtained by using a mixed vapor composed of organic solvents having different degree-vapor pressure characteristics .
【0027】(第2実施例) 請求項2発明の塗装方法に係る第2実施例を図4〜図6
により説明する。(Second Embodiment) FIGS. 4 to 6 show a second embodiment of the coating method according to the second aspect of the present invention.
This will be described below.
【0028】図4は本実施例の方法に用いる塗装装置の
模式的側断面図、図5は図4の有機溶剤ガス供給室7、
空気吸引室18近傍の拡大図、図6は本実施例に用いる
各有機溶剤の温度−蒸気圧特性線図である。FIG. 4 is a schematic side sectional view of a coating apparatus used in the method of this embodiment, and FIG. 5 is an organic solvent gas supply chamber 7 of FIG.
The air suction chamber 18 enlarged view of the vicinity, FIG. 6 is a temperature of the organic solvent used in this embodiment - a vapor pressure characteristic diagram.
【0029】図4、図5において、18はウエブ1の走
行方向より見て、有機溶剤ガス供給室7の上流側に、そ
の下部がウエブ1の塗装面に近接するよう設けられた空
気吸引室、19は減圧用ポンプ20に連通して空気吸引
室18から空気を吸出すための空気吸引口、20は空気
吸引室18を負圧にして、ウエブ1が随伴するその塗装
面の空気層を吸引し去るための減圧用ポンプ、21は有
機溶剤22を溶れるためのタンク、22は他の有機溶剤
12,13と共に混合ガスを作るための有機溶剤、23
はタンク21の底部に付設され、有機溶剤22を暖め
て、その蒸気化を適切に促進するためのヒータ、26は
模式的に示した、ウエブ1塗装面上の随伴空気層流、2
8は模式的に示した有機溶剤混合ガス流である。その他
の構成は第1実施例に係る図1、図2と同様である。4 and 5, reference numeral 18 denotes an air suction chamber which is provided upstream of the organic solvent gas supply chamber 7 when viewed from the running direction of the web 1 and whose lower portion is close to the coating surface of the web 1. , 19 are air suction ports for communicating with a decompression pump 20 to suck air from the air suction chamber 18, and 20 is a negative pressure applied to the air suction chamber 18, and its painted surface accompanied by the web 1. A decompression pump for sucking and removing an air layer, a tank 21 for dissolving an organic solvent 22, an organic solvent 22 for forming a mixed gas with other organic solvents 12 and 13, 23
Is a heater attached to the bottom of the tank 21 for warming the organic solvent 22 and appropriately promoting the vaporization thereof. 26 is a schematic diagram showing the laminar air flow on the painted surface of the web 1,
8 is an organic solvent mixed gas flow schematically shown. Other configurations are the same as those in FIGS. 1 and 2 according to the first embodiment.
【0030】即ち、第2実施例の場合は、有機溶剤ガス
供給室7の上流側に空気吸引室18を設けた点、混合蒸
気の有機溶剤として3種類を用いる点が第1実施例と異
なる。That is, the second embodiment differs from the first embodiment in that an air suction chamber 18 is provided on the upstream side of the organic solvent gas supply chamber 7 and that three types of organic solvents for mixed vapor are used. .
【0031】次に、以上のような構成の塗装装置を用い
て塗装する場合の第2実施例の塗装方法について説明す
る。Next, a description will be given of a coating method according to a second embodiment in the case where the coating is performed using the coating apparatus having the above configuration.
【0032】被塗装物のウエブ1が空気吸引室18下方
を通過することにより、その塗装面に随伴している空気
層の大部分は随伴空気層流26の向きに吸引され、塗装
面から剥離する。[0032] By web 1 of the painting material is passed through the air suction chamber 18 under lateral <br/>, most of the air layer that is associated to the coated surface is sucked in the direction of the following air layer flow 26 Is painted
It peeled off from the surface.
【0033】次いでウエブ1は有機溶剤ガス供給室7下
方を通過することにより、その塗装面に極く少量残留す
る随伴空気は、有機溶剤12,13,22の混合ガスに
より完全に置換される。この置換メカニズムは有機溶剤
ガス供給室7から壁7aを介して空気吸引室18に向っ
て高速で流れてくる有機溶剤混合ガス流28によって、
残留空気層が塗装面から完全に剥離された状態となり、
次いで、完全に有機溶剤12,13,22の混合ガスの
みから成る有機溶剤ガス供給室7に入るので、ウエブ1
の塗装面には有機溶剤12,13,22の混合ガスのみ
が存在することとなる。Next, the web 1 is placed under the organic solvent gas supply chamber 7.
In this way , the entrained air remaining on the painted surface in a small amount is completely replaced by the mixed gas of the organic solvents 12, 13 and 22. This substitution mechanism is performed by an organic solvent mixed gas stream 28 flowing at high speed from the organic solvent gas supply chamber 7 to the air suction chamber 18 via the wall 7a .
The residual air layer is completely separated from the painted surface ,
Next, the web 1 enters the organic solvent gas supply chamber 7 consisting entirely of the mixed gas of the organic solvents 12, 13, 22.
Only the mixed gas of the organic solvents 12, 13 and 22 exists on the painted surface of.
【0034】有機溶剤ガス供給室7の気相を構成する有
機溶剤12,13,22の混合ガスは次のようにして作
られる。即ち、例えば有機溶剤12,13,22として
アセトン、ベンゼン及びトルエンの3種類の有機溶剤1
2,13,22から成る混合ガスを作成する場合には、
これらの有機溶剤12,13,22の温度−蒸気圧特性
線図は図6のようであるので、それぞれの有機溶剤1
2,13,22の液を50℃に加熱すればこれら3種類
の混合蒸気の圧力は760トール以上(約930トー
ル)を示すことになる。従って、有機溶剤12としてア
セトン、13としてベンゼン又、22としてトルエンを
選定し、ヒータ14,15,23にてそれぞれを50℃
に加熱しておけば配管16内をこれらの有機溶剤12,
13,22のガスが通過し、ガス混合器17にて完全に
混合されたのち、配管9を介してノズル8から有機溶剤
ガス供給室7内に約900トールの圧力で吹込まれる。The mixed gas of the organic solvents 12, 13, 22 constituting the gas phase of the organic solvent gas supply chamber 7 is produced as follows. That is, for example, three kinds of organic solvents 1 of acetone, benzene and toluene are used as the organic solvents 12, 13, and 22.
When preparing a mixed gas consisting of 2, 13, 22
Temperature of the organic solvents 12,13,22 - vapor pressure characteristics
Since the diagram is as shown in FIG . 6, each organic solvent 1
If the liquids 2, 13, and 22 are heated to 50 ° C., the pressure of these three types of mixed steam will be 760 Torr or more (about 930 Torr). Therefore, acetone was selected as the organic solvent 12, benzene was selected as 13, and toluene was selected as 22, and each of the heaters 14, 15, and 23 was heated to 50 ° C.
If heated, the inside of the pipe 16 is
After the gases 13 and 22 pass and are completely mixed in the gas mixer 17, they are blown into the organic solvent gas supply chamber 7 from the nozzle 8 through the pipe 9 at a pressure of about 900 Torr.
【0035】なお、有機溶剤ガス供給室7の壁7a外面
及びウエブ1塗装面を約50℃にしておけば、この有機
溶剤12,13,22の混合ガスは凝縮することなくウ
エブ1塗装面に付着したまま、生塗膜5の下面に入り込
むが、この生塗膜5がウエブ1に衝突する際の衝突圧に
よって、ウエブ1塗装面の付着混合ガスは容易に液相に
凝縮し、塗膜6中の有機溶剤と同化し、ガス体としては
全く残留することはない。If the outer surface of the wall 7a of the organic solvent gas supply chamber 7 and the coating surface of the web 1 are kept at about 50 ° C., the mixed gas of the organic solvents 12, 13 and 22 does not condense on the web. Although the raw coating film 5 adheres to the lower surface of the raw coating film 5 while adhering to the coating surface, the mixed gas adhering to the coating surface of the web 1 is easily condensed into a liquid phase by the collision pressure when the raw coating film 5 collides with the web 1. However, it is assimilated with the organic solvent in the coating film 6 and does not remain as a gas at all.
【0036】本第2実施例では有機溶剤として12,1
3,22の3種類を用いたが、3種類に限定されるもの
ではなく、2種類でもよく、4種類以上であってもよ
い。また、用いられる有機溶剤も、アセトン、ベンゼ
ン、トルエンに限定されるものではない。In the second embodiment, 12,1 is used as the organic solvent.
Although three types of 3, 22 were used, the number is not limited to three, but may be two, or four or more. Further, the organic solvent used is not limited to acetone, benzene or toluene.
【0037】以上の通り、第1実施例によればウエブ1
に塗料液4を吹き出すスリットノズル3の上流側に有機
溶剤ガス供給室7を設け、有機溶剤12,13の混合蒸
気をウエブ1塗装面に接触、凝縮させ、しかるのち、ス
リットノズル3から塗料液4を生塗膜5としてウエブ1
塗装面に向けて吐出させ、密着塗布させて塗膜6を形成
させるので、塗膜6に空気の入り込む機会がなく、か
つ、有機溶剤の混合蒸気(ガス)は、従来のCO2 ガス
等と異なり、常温で凝縮、液体となると共に塗料の有機
溶剤と親和性を有するため、直ちに溶け合って気泡を生
じることがないので、塗膜6に空気泡、ガス気泡の巻き
込まれる不具合が生じないという利点がある。As described above, according to the first embodiment, the web 1
An organic solvent gas supply chamber 7 is provided on the upstream side of the slit nozzle 3 for blowing the coating liquid 4, and the mixed vapor of the organic solvents 12 and 13 is brought into contact with the coated surface of the web 1 and condensed. 4 as raw coating film 5 for web 1
Since it is discharged toward the painted surface and adhered to form the coating film 6, there is no opportunity for air to enter the coating film 6, and the mixed vapor (gas) of the organic solvent is different from that of the conventional CO 2 gas or the like. On the contrary, since it becomes condensed and liquid at room temperature and has an affinity for the organic solvent of the paint, it does not immediately melt and generate air bubbles, so that there is no problem that air bubbles and gas bubbles are entrained in the coating film 6. There is.
【0038】また、第2実施例によれば、上記有機溶剤
ガス供給室7の更に上流側に空気吸引室18を設け、ウ
エブ1塗装面に随伴されて来る空気層を吸引して取去り
ながら下流側の有機溶剤ガス供給室7の混合ガス雰囲気
に晒すので、第1実施例の利点に加え、空気泡が塗膜6
に巻き込まれる機会が一層、低減するという利点があ
る。Further, according to the second embodiment, an air suction chamber 18 is provided further upstream of the organic solvent gas supply chamber 7 so that the air layer accompanying the painted surface of the web 1 is sucked and removed. Since it is exposed to the mixed gas atmosphere in the organic solvent gas supply chamber 7 on the downstream side, in addition to the advantages of the first embodiment, air bubbles are generated in the coating film 6.
This has the advantage of further reducing the chances of being caught in
【0039】[0039]
【発明の効果】本発明は上記のように構成されるので次
の効果を有する。The present invention has the following effects because it is configured as described above.
【0040】(1)請求項1の発明にあっては、鋼帯塗
装面に塗布液を吐出する部位より上 流側で移動している
鋼帯の塗装面に複数の有機溶剤からなる混合蒸気を接
触、凝縮させるので、塗布液と帯状体との濡れ性が向上
し、空気泡の巻き込みが防止される。従って、鋼帯の塗
装面には気泡のない良質の塗装面が形成される。(1) In the invention of claim 1 , a steel strip coating
Moving above flow side of the site for discharging a coating solution to Somen
Since a mixed vapor composed of a plurality of organic solvents is brought into contact with and condensed on the coated surface of the steel strip, the wettability between the coating liquid and the strip is improved, and the entrapment of air bubbles is prevented. Therefore, the coating of steel strip
A high quality painted surface without bubbles is formed on the mounting surface.
【0041】(2)請求項2の発明にあっては、上記
(1)の有機溶剤の混合蒸気を接触、凝縮させる鋼帯の
塗装面部位よりも更に上流側に、鋼帯の塗装面に随伴さ
れる空気層を吸引する手段を設けて、その空気層を吸引
するので、塗装面に空気の巻込まれる機会が一層減り、
一層、気泡のないより優れた塗装面を形成することがで
きる。[0041] (2) In the invention of claim 2, it said (1) contacting the mixed vapor of the organic solvent, the condensation makes the steel strip
Further upstream side of the coated surface site is associated painted surfaces of the steel strip
Re that is provided with means for sucking the air layer, so to suck the air layer, even fewer opportunities to be caught with an air painted surfaces,
It is possible to form a better painted surface without bubbles.
I can .
【図1】本発明の第1実施例の方法に用いる塗装装置の
模式的側断面図、FIG. 1 is a schematic side sectional view of a coating apparatus used in a method according to a first embodiment of the present invention;
【図2】図1の有機溶剤ガス供給室7近傍の拡大図、FIG. 2 is an enlarged view of the vicinity of an organic solvent gas supply chamber 7 in FIG.
【図3】第1実施例の方法に用いる各有機溶剤の温度−
蒸気圧特性線図、FIG. 3 shows the temperature of each organic solvent used in the method of the first embodiment.
Vapor pressure characteristic diagram,
【図4】本発明の第2実施例の方法に用いる塗装装置の
模式的側断面図、FIG. 4 is a schematic side sectional view of a coating apparatus used in the method according to the second embodiment of the present invention;
【図5】図4の有機溶剤ガス供給室7及び空気吸引室1
8近傍の拡大図、5 is an organic solvent gas supply chamber 7 and an air suction chamber 1 shown in FIG.
Enlarged view near 8
【図6】第2実施例の方法に用いる各有機溶剤の温度−
蒸気圧特性線図、FIG. 6 shows the temperature of each organic solvent used in the method of the second embodiment.
Vapor pressure characteristic diagram,
【図7】従来例の塗装方法に用いる塗装装置の模式的側
断面図である。FIG. 7 is a schematic side sectional view of a coating apparatus used for a conventional coating method.
【符号の説明】 1 ウエブ(帯状体) 2 バックアップロール 3 スリットノズル 4 塗料液 5 生塗膜 6 塗膜 7 有機溶剤ガス供給室 7a 壁 8 ノズル 9 配管 10,11 タンク 12,13 有機溶剤 14,15 ヒータ 16 配管 17 ガス混合器 18 空気吸引室 19 空気吸引口 20 減圧用ポンプ 21 タンク 22 有機溶剤 23,25 ヒータ 26 随伴空気層流 27 薄膜 28 有機溶剤混合ガス流[Description of Signs] 1 Web (band) 2 Backup roll 3 Slit nozzle 4 Paint liquid 5 Raw coating 6 Coating 7 Organic solvent gas supply chamber 7a Wall 8 Nozzle 9 Piping 10, 11 Tank 12, 13 Organic solvent 14, Reference Signs List 15 heater 16 pipe 17 gas mixer 18 air suction chamber 19 air suction port 20 decompression pump 21 tank 22 organic solvent 23, 25 heater 26 accompanying air laminar flow 27 thin film 28 organic solvent mixed gas flow
───────────────────────────────────────────────────── フロントページの続き (72)発明者 平井 悦郎 広島市西区観音新町四丁目6番22号 三 菱重工業株式会社広島研究所内 (72)発明者 杉原 正浩 広島市西区観音新町四丁目6番22号 三 菱重工業株式会社広島研究所内 (72)発明者 竹岡 康良 広島市西区観音新町四丁目6番22号 三 菱重工業株式会社広島研究所内 (72)発明者 能見 亮一 大阪市中央区北浜4丁目5番33号 住友 金属工業株式会社内 (72)発明者 野口 之彦 大阪市中央区北浜4丁目5番33号 住友 金属工業株式会社内 (56)参考文献 特開 昭62−95173(JP,A) 特開 平3−181368(JP,A) 特開 昭62−289264(JP,A) 特公 昭48−39802(JP,B1) (58)調査した分野(Int.Cl.7,DB名) B05D 1/26 B05C 5/02 B05D 3/00 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Etsuro Hirai 4-2-2 Kannon Shinmachi, Nishi-ku, Hiroshima Sanritsu Heavy Industries, Ltd. Hiroshima Laboratory (72) Inventor Masahiro Sugihara 4--22 Kannon Shinmachi, Nishi-ku, Hiroshima City No. 7 Hiroshi Heavy Industries, Ltd.Hiroshima Laboratory (72) Inventor Yasuyoshi Takeoka 6-22, Kannon Shinmachi, Nishi-ku, Hiroshima City Inside Hiroshima Research Lab., Mitsubishi Heavy Industries, Ltd. (72) Ryoichi Nomi 4-5 Kitahama, Chuo-ku, Osaka City No. 33 Sumitomo Metal Industries Co., Ltd. (72) Inventor Yukihiko Noguchi 4-5-33 Kitahama, Chuo-ku, Osaka City Sumitomo Metal Industries Co., Ltd. (56) References JP-A-62-95173 (JP, A) JP-A-3-181368 (JP, A) JP-A-62-289264 (JP, A) JP-B-48-39802 (JP, B1) (58) Fields investigated (Int. Cl. 7 , DB name) B05D 1 / 26 B05C 5/02 B05D 3/00
Claims (2)
ズルを対向配置し、鋼帯幅方向に開口させた前記スリッ
トノズルより吐出される塗料液を鋼帯塗装面に任意厚み
で塗布する塗装方法において、前記スリットノズルの上
流側に設置されたノズルから加熱手段により加熱され、
ガス状となった温度−蒸気圧特性の異なる複数の有機溶
剤の混合蒸気を前記鋼帯塗装面に吹きつけて接触、凝縮
させたのち、上記スリットノズルから塗料液を前記鋼帯
塗装面に吐出し塗布することを特徴とする塗装方法。1. A slit Roh <br/> nozzle disposed opposite to the coated surface of the steel strip traveling continuously, paint solution the slit <br/> Ru discharged from bets nozzle is open mouth steel strip width direction In a coating method of applying an arbitrary thickness to the steel strip coating surface, heated by a heating means from a nozzle installed on the upstream side of the slit nozzle ,
A gaseous temperature-vapor pressure mixed vapor of a plurality of organic solvents having different vapor pressure characteristics is sprayed onto the steel strip coating surface to contact and condense, and then the coating liquid is passed from the slit nozzle to the steel strip.
A coating method characterized by discharging and applying to a painted surface .
ノズルの設置位置より更に上流側に吸引手段を設け、該
吸引手段により走行する鋼帯塗装面に随伴する空気層を
吸引させることを特徴とする塗装方法。2. The coating method according to claim 1, wherein
Suction means is provided further upstream from the installation position of the nozzle,
The air layer entrained to the steel strip coated surface which runs by the suction means
Coating wherein the cause Aspirate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15928093A JP3258456B2 (en) | 1993-06-29 | 1993-06-29 | Painting method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15928093A JP3258456B2 (en) | 1993-06-29 | 1993-06-29 | Painting method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH078888A JPH078888A (en) | 1995-01-13 |
JP3258456B2 true JP3258456B2 (en) | 2002-02-18 |
Family
ID=15690348
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15928093A Expired - Fee Related JP3258456B2 (en) | 1993-06-29 | 1993-06-29 | Painting method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3258456B2 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI115295B (en) * | 1999-09-01 | 2005-04-15 | Metso Paper Inc | Curtain coating device and curtain coating method |
JP3676182B2 (en) * | 2000-04-03 | 2005-07-27 | 三菱重工業株式会社 | Coating apparatus and coating method |
JP5015477B2 (en) * | 2006-03-16 | 2012-08-29 | メッツォ ペーパー インコーポレイテッド | Non-contact coating apparatus and paper machine equipped with the same |
-
1993
- 1993-06-29 JP JP15928093A patent/JP3258456B2/en not_active Expired - Fee Related
Also Published As
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JPH078888A (en) | 1995-01-13 |
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