JPH10328606A - Method and device for forming paint film - Google Patents
Method and device for forming paint filmInfo
- Publication number
- JPH10328606A JPH10328606A JP14407297A JP14407297A JPH10328606A JP H10328606 A JPH10328606 A JP H10328606A JP 14407297 A JP14407297 A JP 14407297A JP 14407297 A JP14407297 A JP 14407297A JP H10328606 A JPH10328606 A JP H10328606A
- Authority
- JP
- Japan
- Prior art keywords
- coating film
- coating
- paint film
- superconducting magnet
- metal strip
- 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.)
- Pending
Links
Landscapes
- Application Of Or Painting With Fluid Materials (AREA)
- Coating Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、広くは移送される
金属帯への塗膜形成方法及びその装置に関し、特に塗膜
厚均一性に優れた塗膜形成方法及びその装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to a method and an apparatus for forming a coating film on a metal strip to be transferred, and more particularly to a method and an apparatus for forming a coating film having excellent uniformity in coating thickness.
【０００２】[0002]
【従来の技術】鋼板表面の耐食性、美観性、加工性、絶
縁性等のさまざまな目的のために各種の塗布液が鋼板表
面に塗布される。これらの目的を達成するためには、均
一な塗膜の形成が必要である。また、外観性の問題から
塗布むらのない塗膜の形成が望まれている。2. Description of the Related Art Various coating liquids are applied to the surface of a steel sheet for various purposes such as corrosion resistance, aesthetics, workability, and insulation. In order to achieve these objects, it is necessary to form a uniform coating film. Further, formation of a coating film without coating unevenness is desired from the viewpoint of appearance.
【０００３】しかし、移送される鋼板表面に塗布する
際、必ずしも均一な塗膜が得られない。例えば、ロール
接触部において同方向に回転する２ロールコーターでは
ロール間のメカニズムにおいて発生するローピングによ
るライン移送方向に平行な筋ムラが生じたり、あるい
は、ロール間やロール−鋼板間に気泡が巻き込まれ、筋
ムラが生じ、外観欠陥や上記に挙げた各機能が損なわれ
る問題が発生する。したがって、塗布時の筋ムラ等を解
消するために、塗布後に塗膜厚を均一にする必要が生じ
る。この塗膜厚均一方法として塗布した位置の下流側に
ガスワイピング装置を配置し、ガスワイピング装置より
ガスを鋼帯上の塗膜に噴射し、塗膜厚の均一化を図る方
法が用いられている。例えば、特開平７−６２４４５号
公報には、鋼帯を挟むように配置された１対のロールコ
ーターにより塗布した後、その下流側に鋼帯を挟むよう
に配置された１対のガスワイピングノズルによりエアー
を鋼帯上の塗膜に対して噴射し、塗膜厚の均一化を図る
方法が開示されている。[0003] However, a uniform coating film cannot always be obtained when applied to the surface of a transferred steel sheet. For example, in a two-roll coater that rotates in the same direction at the roll contact portion, line unevenness occurs parallel to the line transfer direction due to roping that occurs in the mechanism between the rolls, or bubbles are caught between the rolls or between the roll and the steel plate. In addition, stripe unevenness occurs, which causes a problem of appearance defect and impairment of each of the above-mentioned functions. Therefore, it is necessary to make the thickness of the coating film uniform after application in order to eliminate streak unevenness at the time of application. As a method of coating thickness uniformity, a method is used in which a gas wiping device is arranged downstream of the position where the coating is performed, and a gas is sprayed from the gas wiping device onto the coating film on the steel strip to make the coating film thickness uniform. I have. For example, Japanese Patent Application Laid-Open No. 7-62445 discloses that a pair of gas wiping nozzles arranged so as to sandwich a steel strip on the downstream side after application by a pair of roll coaters arranged so as to sandwich a steel strip. Discloses a method for injecting air to a coating film on a steel strip to make the coating film thickness uniform.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、こうし
たガスワイピングノズルからのエアー噴射により塗膜厚
の均一化を図る塗膜形成方法では、エアー噴射により鋼
帯上の塗布液が飛散するスプラッシュ現象が生じ、作業
環境を著しく悪化させるとともに、この飛散した塗布液
が外観劣化の原因となる。特に、鋼帯のライン速度を増
大するほど、エアー噴射による塗膜への衝突圧力を高く
しなければならず、スプラッシュ現象は顕著になり、外
観劣化による歩留りの低下という問題点がある。However, in such a coating film forming method for making the coating film thickness uniform by the air injection from the gas wiping nozzle, a splash phenomenon occurs in which the coating liquid on the steel strip is scattered by the air injection. In addition, the working environment is remarkably deteriorated, and the scattered coating liquid causes deterioration of appearance. In particular, as the line speed of the steel strip increases, the collision pressure against the coating film by the air jet must be increased, and the splash phenomenon becomes remarkable, and there is a problem in that the yield is reduced due to deterioration in appearance.
【０００５】本発明の目的は上記のような問題点を解決
するために、塗布後の不均一な塗膜を均一化させるにあ
たり、外観劣化のない均一な塗膜の形成方法及びその装
置を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a method and an apparatus for forming a uniform coating film without any deterioration in appearance, in order to make the uneven coating film uniform after coating in order to solve the above problems. Is to do.
【０００６】[0006]
【課題を解決するための手段】前記課題を解決し目的を
達成するために、本発明は以下に示す手段を用いてい
る。 （１）本発明の方法は、移送される金属帯上に塗布液を
塗布して塗膜を形成した後、超電導マグネットを用い
て、塗膜表面から金属帯表面方向へ３〜１５Ｔの磁場を
付与することを特徴とする塗膜形成方法である。In order to solve the above problems and achieve the object, the present invention uses the following means. (1) In the method of the present invention, after a coating solution is applied on a metal strip to be transferred to form a coating film, a magnetic field of 3 to 15 T is applied from the surface of the coating film toward the metal strip surface using a superconducting magnet. A method for forming a coating film characterized by applying a coating.
【０００７】（２）本発明の装置は、移送される金属帯
上に塗布液を塗布して塗膜を形成する手段と、塗膜表面
から金属帯表面方向への磁場を付与する超電導マグネッ
トとを具備することを特徴とする塗膜形成装置である。(2) The apparatus of the present invention comprises a means for applying a coating solution onto a metal strip to be transferred to form a coating film, a superconducting magnet for applying a magnetic field from the coating film surface to the metal strip surface. It is a coating film forming apparatus characterized by comprising:
【０００８】[0008]
【発明の実施の形態】本発明者らは上記の課題達成のた
めに、移送される金属帯上へ均一な塗膜を形成する方法
及びその装置について鋭意研究を重ねた。その結果、超
電導マグネットにより塗膜に対して磁力を作用させるこ
とにより、塗布時に不均一な塗膜厚を均一にすることが
できるという知見を得た。BEST MODE FOR CARRYING OUT THE INVENTION In order to achieve the above object, the present inventors have intensively studied a method and an apparatus for forming a uniform coating film on a transferred metal strip. As a result, it has been found that a non-uniform coating film thickness can be made uniform at the time of coating by applying a magnetic force to the coating film using a superconducting magnet.
【０００９】この知見に基づき、本発明者らは、移送さ
れる金属帯上に塗膜を形成した後、超電導マグネットを
用いて塗膜表面から金属帯表面への磁場を付与させるよ
うにして、外観劣化のない均一な塗膜の形成方法及びそ
の装置を見出し、本発明を完成させた。[0009] Based on this finding, the present inventors formed a coating film on the metal strip to be transferred, and then applied a magnetic field from the coating film surface to the metal strip surface using a superconducting magnet. The present inventors have found a method and an apparatus for forming a uniform coating film without deterioration in appearance, and have completed the present invention.
【００１０】以下、本発明の実施の形態について説明す
る。塗布液を移送される金属帯に対して塗布して塗膜を
形成した後、その下流側に配置した超電導マグネットに
より塗膜表面から金属帯表面方向へ３〜１５Ｔの強磁場
を発生させる。この強磁場により塗布後の金属帯上の塗
膜は、磁化を帯び、反磁性を示す。超電導マグネット
は、超電導体であるから反磁性体である。したがって、
両者の間に反発する磁気力が生じ、塗膜に対して塗膜表
面から金属体表面方向への力が働く。この力により塗膜
がせき止められ、塗膜厚の均一な塗膜が得られる。Hereinafter, embodiments of the present invention will be described. After the coating liquid is applied to the transferred metal strip to form a coating film, a strong magnetic field of 3 to 15 T is generated from the coating film surface toward the metal strip surface by a superconducting magnet disposed downstream of the coating liquid. Due to this strong magnetic field, the coating film on the metal strip after being applied becomes magnetized and shows diamagnetism. The superconducting magnet is a diamagnetic material because it is a superconductor. Therefore,
A repulsive magnetic force is generated between the two, and a force acts on the coating from the coating surface toward the metal body surface. With this force, the coating film is dammed and a coating film having a uniform coating thickness is obtained.
【００１１】金属帯に塗布する手段はロールコーター、
ダイコーター、スライドコーター、カーテンコーター
等、何でも良く、特に限定するものではない。超電導マ
グネットは、金属帯上の塗膜が十分に磁化されるように
塗膜表面近傍に設置する。The means for coating the metal strip is a roll coater,
Anything such as a die coater, a slide coater, and a curtain coater may be used, and there is no particular limitation. The superconducting magnet is installed near the surface of the coating so that the coating on the metal strip is sufficiently magnetized.
【００１２】この時の超電導マグネットと塗膜表面まで
の距離、あるいは超電導マグネットの磁場の必要な大き
さは、金属帯のライン速度、塗布後の塗膜の不均一度合
いを考慮して、塗膜表面から金属帯表面方向へ３〜１５
Ｔの磁場が付与されるように調整する。以下に本発明の
実施例を挙げ、本発明の効果を立証する。At this time, the distance between the superconducting magnet and the surface of the coating film or the required magnitude of the magnetic field of the superconducting magnet is determined in consideration of the line speed of the metal strip and the degree of unevenness of the coating film after coating. 3 to 15 from surface to metal band surface
Adjust so that a magnetic field of T is applied. Hereinafter, examples of the present invention will be described to demonstrate the effects of the present invention.
【００１３】[0013]
【実施例】本発明の実施例を図１に示す。塗布装置はパ
ン皿２から樹脂水溶液３を汲み上げる金属製のピックア
ップロール４とピックアップロール４から樹脂水溶液３
を移送される鋼帯１に転写するゴム製のアプリケーター
ロール５、及び金属製のバックアップロール６より構成
されている。また、アプリケーターロール５と鋼帯１と
の接触位置より下流側に超電導マグネット７を配置して
いる。FIG. 1 shows an embodiment of the present invention. The coating device is a metal pickup roll 4 for pumping the resin solution 3 from the pan 2 and the resin solution 3 from the pickup roll 4.
Is transferred to the steel strip 1 to be transferred. The applicator roll 5 is made of rubber, and the backup roll 6 is made of metal. Further, a superconducting magnet 7 is disposed downstream from a contact position between the applicator roll 5 and the steel strip 1.
【００１４】このような塗布装置において樹脂水溶液を
コーティングした例を述べる。鋼帯１として厚さ０．２
ｍｍ、幅２００ｍｍのものを用い、ピックアップロール
４、及びアプリケーターロール５は何れも幅２５０ｍ
ｍ、ロール径２５０ｍｍのものを用いた。バックアップ
ロール６は幅５００ｍｍ、ロール径５００ｍｍのものを
用いた。超電導マグネット７としてＮｂ3 Ｓｎを用い、
磁場の強さは約１０Ｔのものを用いた。パン皿２内を樹
脂水溶液３で満たし、ピックアップロール４を鋼帯１走
行方向と逆方向に回転させ、パン皿２内の樹脂水溶液３
を汲み上げる。また、アプリケーターロール５を鋼帯１
走行方向と同方向に回転させ、ピックアップロール４に
接触させ、さらに鋼帯１に接触させ、樹脂水溶液３を鋼
板１に塗布した。超電導マグネット７と鋼帯１との距離
が５ｍｍとなるように超電導マグネット７を配置させ
た。An example in which a resin aqueous solution is coated in such a coating apparatus will be described. Thickness 0.2 as steel strip 1
mm and a width of 200 mm, and the pickup roll 4 and the applicator roll 5 each have a width of 250 m.
m and a roll diameter of 250 mm were used. The backup roll 6 had a width of 500 mm and a roll diameter of 500 mm. Using Nb 3 Sn as the superconducting magnet 7,
The strength of the magnetic field was about 10T. The inside of the pan 2 is filled with the aqueous resin solution 3, and the pickup roll 4 is rotated in the direction opposite to the running direction of the steel strip 1, and the aqueous resin 3 in the pan 2 is rotated.
Pump. Further, the applicator roll 5 is connected to the steel strip 1.
The resin solution was applied to the steel sheet 1 by rotating in the same direction as the running direction, contacting the pickup roll 4, and further contacting the steel strip 1. Superconducting magnet 7 was arranged such that the distance between superconducting magnet 7 and steel strip 1 was 5 mm.
【００１５】あるライン速度（６０〜１５０ｍｐｍ）に
対して、各ロール周速、及びロール間、ロール−鋼帯間
の押し付け圧力を調整し、乾燥後の塗膜厚が１μｍとな
るように塗布を行なった結果を表１に示している。塗膜
厚の計測は幅方向において５箇所計測し、その平均値と
標準偏差を示している。表面外観は○：良好（筋ムラな
し）、△：一部に筋ムラあり。×：不良（ほぼ全面に筋
ムラあり）で評価した。For a certain line speed (60 to 150 mpm), the peripheral speed of each roll and the pressing pressure between the rolls and between the roll and the steel strip are adjusted so that the coating thickness after drying becomes 1 μm. The results obtained are shown in Table 1. The coating thickness was measured at five points in the width direction, and the average value and standard deviation are shown. Surface appearance: ：: good (no streaks), Δ: some streaks. X: Evaluated as poor (streak unevenness on almost the entire surface).
【００１６】また、表１には比較のため超電導マグネッ
ト７の位置にエアーノズルを配置し、エアー噴射を行な
った結果（従来技術）もあわせて示している。塗布後に
何も均一化を行なわない場合、全条件において筋ムラが
発生し、塗膜厚の不均一、外観欠陥が観測された。一
方、エアー噴射を行なった場合、ライン速度が比較的低
速な場合（６０、９０ｍｐｍ）では、スプラッシュの発
生も比較的少なく、均一な膜厚が得られたが、ライン速
度の増大に伴い、スプラッシュの発生が顕著になり、塗
膜厚が低減するとともに、スプラッシュがエアーノズル
や周辺に付着し、それらの清掃等のメンテナンスを頻繁
に行なわなければならなかった。In addition, Table 1 also shows the results (prior art) of the air injection performed by disposing an air nozzle at the position of the superconducting magnet 7 for comparison. In the case where no uniformization was performed after coating, streak unevenness occurred under all conditions, and uneven coating thickness and appearance defects were observed. On the other hand, when the air injection was performed, when the line speed was relatively low (60, 90 mpm), the occurrence of splash was relatively small, and a uniform film thickness was obtained. As a result, the thickness of the coating film was reduced, and the splash adhered to the air nozzle and the periphery thereof, and maintenance such as cleaning of the air nozzle had to be performed frequently.
【００１７】これに対し、本発明の超電導マグネットを
用いた場合、全条件において塗膜厚の均一化が得られ、
外観欠陥も観測されず、また、スプラッシュの発生がな
いため非常に良好な作業環境も得られた。On the other hand, when the superconducting magnet of the present invention is used, the coating film thickness can be made uniform under all conditions.
No appearance defect was observed, and a very good working environment was obtained because no splash was generated.
【００１８】[0018]
【表１】 [Table 1]
【００１９】[0019]
【発明の効果】以上のように、本発明によれば、超電導
マグネットにより塗膜に対して磁力を作用させる構成と
なっているため、塗布時に不均一な塗膜厚を均一にし、
外観欠陥のない膜厚均一性に優れた塗膜を形成させるこ
とができる。As described above, according to the present invention, since the magnetic force acts on the coating film by the superconducting magnet, the coating film thickness is made non-uniform at the time of coating.
It is possible to form a coating film having excellent film thickness uniformity without appearance defects.
【図１】本発明の実施例に係る塗膜形成装置の概略図。FIG. 1 is a schematic diagram of a coating film forming apparatus according to an embodiment of the present invention.
１…鋼帯、２…パン皿、３…樹脂水溶液、４…ピックア
ップロール、５…アプリケーターロール、６…バックア
ップロール、７…超電導マグネット。DESCRIPTION OF SYMBOLS 1 ... Steel strip, 2 ... Bread pan, 3 ... Resin aqueous solution, 4 ... Pickup roll, 5 ... Applicator roll, 6 ... Backup roll, 7 ... Superconducting magnet.
Claims (2)
塗膜を形成した後、超伝導マグネットを用いて、塗膜表
面から金属帯表面方向へ３〜１５Ｔの磁場を付与するこ
とを特徴とする塗膜形成方法。1. A method of applying a coating liquid on a metal strip to be transferred to form a coating film, and then applying a magnetic field of 3 to 15 T from the coating film surface to the metal band surface using a superconducting magnet. A coating film forming method characterized by the above-mentioned.
塗膜を形成する手段と、塗膜表面から金属帯表面方向へ
の磁場を付与する超電導マグネットとを具備することを
特徴とする塗膜形成装置。And a superconducting magnet for applying a magnetic field from the surface of the coating film toward the surface of the metal band. Coating film forming equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14407297A JPH10328606A (en) | 1997-06-02 | 1997-06-02 | Method and device for forming paint film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14407297A JPH10328606A (en) | 1997-06-02 | 1997-06-02 | Method and device for forming paint film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10328606A true JPH10328606A (en) | 1998-12-15 |
Family
ID=15353640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14407297A Pending JPH10328606A (en) | 1997-06-02 | 1997-06-02 | Method and device for forming paint film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10328606A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008142690A (en) * | 2006-11-16 | 2008-06-26 | Kyodo Printing Co Ltd | Method for forming medium having design property and medium having design property |
-
1997
- 1997-06-02 JP JP14407297A patent/JPH10328606A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008142690A (en) * | 2006-11-16 | 2008-06-26 | Kyodo Printing Co Ltd | Method for forming medium having design property and medium having design property |
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