JPH0377675A - Heating method for metallic strip in oven of continuously-coating line - Google Patents
Heating method for metallic strip in oven of continuously-coating lineInfo
- Publication number
- JPH0377675A JPH0377675A JP21195289A JP21195289A JPH0377675A JP H0377675 A JPH0377675 A JP H0377675A JP 21195289 A JP21195289 A JP 21195289A JP 21195289 A JP21195289 A JP 21195289A JP H0377675 A JPH0377675 A JP H0377675A
- Authority
- JP
- Japan
- Prior art keywords
- temp
- solvent
- oven
- resin
- coating
- 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
- 239000011248 coating agent Substances 0.000 title claims abstract description 34
- 238000000576 coating method Methods 0.000 title claims abstract description 34
- 238000010438 heat treatment Methods 0.000 title claims description 27
- 238000000034 method Methods 0.000 title claims description 18
- 239000002904 solvent Substances 0.000 claims abstract description 28
- 238000004132 cross linking Methods 0.000 claims abstract description 14
- 239000011347 resin Substances 0.000 claims abstract description 13
- 229920005989 resin Polymers 0.000 claims abstract description 13
- 239000002184 metal Substances 0.000 claims description 12
- 239000003973 paint Substances 0.000 claims description 10
- 238000009835 boiling Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 abstract description 23
- 239000010959 steel Substances 0.000 abstract description 23
- 238000001704 evaporation Methods 0.000 abstract description 12
- 230000008020 evaporation Effects 0.000 abstract description 12
- 230000001105 regulatory effect Effects 0.000 abstract 4
- 230000005587 bubbling Effects 0.000 abstract 2
- 239000006260 foam Substances 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 11
- 238000001035 drying Methods 0.000 description 6
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は、金属ストリップの連続塗装ラインのオーブ
ンにおける昇熱のヒートパターンにおいて、泡による塗
膜欠陥防止を目的とする金属ストリップの加熱方法に関
するものである。Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a method of heating a metal strip for the purpose of preventing coating film defects due to bubbles in a heat pattern of increasing heat in an oven of a continuous coating line for metal strips. It is something.
［従来の技術］
第２図は鋼ストリップの連続塗装ラインのオーブンとそ
の周辺を示す説明図である３図中１はオーブンである０
図中２はパスラインロールである０図中３は冷却帯であ
る０図中４はロールコータ−である０図中５は出側プラ
イドルロールである６図中６は入側プライドルロールで
ある０図中７は鋼ストリップのカテナリーである０図中
８は鋼ストリップである１図において鋼ストリップ８は
表面の予備処理（図示せず、）された後入側プライドル
ロール６を経てロールコータ−４に到る。ロールコータ
−４において鋼ストリップ８は表面に懐装される。塗装
された鋼ストリップ８はオーブン１の内において塗料が
加熱乾燥される。[Prior Art] Fig. 2 is an explanatory diagram showing an oven and its surroundings in a continuous coating line for steel strips. In Fig. 3, 1 is the oven. 0
2 in the figure is the pass line roll 0 3 in the figure is the cooling zone 0 4 in the figure is the roll coater 0 5 in the figure is the exit side priddle roll 6 6 in the figure is the input side priddle roll 7 in Figure 0 is a catenary for the steel strip. 8 in Figure 1 is a steel strip. In Figure 1, the steel strip 8 is passed through the entry side priddle roll 6 whose surface has been pretreated (not shown), and then transferred to a roll coater. Reach 4. In the roll coater 4 a steel strip 8 is applied to the surface. The painted steel strip 8 is heated and dried in the oven 1.
加熱乾燥が完了するまで鋼ストリップ８は長いカテナリ
ー７を構成しておりロール及びそのたの横遺物に接触す
ることのない構造となっている。加熱乾燥が完了した後
オーブン１を出てパスラインロール２に到る。鋼ストリ
ップ８の表面に塗装された塗膜に泡による塗膜欠陥が生
じやすい、特開昭６３−１４３９６２号公報においで示
された泡による塗膜欠陥防止を目的とするロールコータ
−方式塗装装置ではロールコータ−の構造に関して発明
がなされている。然し鋼ストリップ８の表面の塗膜に生
じる泡による塗膜欠陥はオーブン内における溶剤の激し
い蒸発による「ワキ」による場合が多く、該装置によっ
てはオーブン内における溶剤の激しい蒸発による「ワキ
」による泡に起因する塗膜欠陥を防止する事は困難であ
る。Until heating and drying is completed, the steel strip 8 constitutes a long catenary 7 that does not come into contact with the rolls and other side objects. After heating and drying is completed, it leaves the oven 1 and reaches the pass line roll 2. A roll coater type coating device aimed at preventing coating film defects due to bubbles as disclosed in Japanese Patent Application Laid-open No. 143962/1983, where coating film defects due to bubbles are likely to occur in the coating film applied to the surface of the steel strip 8. An invention has been made regarding the structure of a roll coater. However, coating film defects caused by bubbles that occur in the coating film on the surface of the steel strip 8 are often caused by "wax" caused by the intense evaporation of the solvent in the oven. It is difficult to prevent coating film defects caused by.
又オーブン内における溶剤の激しい蒸発による「ワキ」
を回避する方法としてオーブンにおける鋼ストリップの
昇熱を徐徐に行なう事が行なわれたやこの方法は能率を
甚だしく低下させるので、他の方法が望まれていた。Also, "wax" due to intense evaporation of solvent in the oven.
One method to avoid this problem was to gradually heat up the steel strip in the oven, but since this method significantly reduced efficiency, other methods were desired.
［発明が解決しようとする課題］
従来の金属ストリップの連続塗装ラインのオーブンの金
属ストリップの加熱方法は以上のように行なわれている
ので、金属ストリップの表面に塗装された塗膜に泡によ
るｔＩｉ膜欠陥が生じやすい。[Problems to be Solved by the Invention] Since the method for heating a metal strip in the oven of a conventional continuous coating line for metal strips is carried out as described above, it is difficult to prevent bubbles from forming on the coating film on the surface of the metal strip. Film defects are likely to occur.
オーブン内における溶剤の激しい蒸発による「ワキ」を
回避する方法としてオーブンにおける金属ストリップの
昇熱を徐徐に行なう事が行なわれたので極めて能率が悪
いという事などの問題点がある。能率が高く、泡による
塗膜欠陥が生じない方法を提供する事が要請されていた
。In order to avoid "flakes" caused by the rapid evaporation of the solvent in the oven, the heating of the metal strip in the oven has been done gradually, resulting in problems such as extremely inefficient efficiency. There was a need to provide a method that is highly efficient and does not cause coating defects due to bubbles.
［課“題を解決するための手段］
この発明に係る、金属ストリップの加熱方法は、連続塗
装ラインのオーブンにおける鋼ストリップの昇熱のヒー
トパターンにおいて、塗料の樹脂の架橋反応が開始する
温度を１０℃以上下まわる温度で且つ溶剤の沸点を１０
℃乃至３０℃下まわる温度で、ｌ０秒以上２５秒以下の
時間保持する事を特徴とする。[Means for Solving the Problems] A method for heating a metal strip according to the present invention is to increase the temperature at which the crosslinking reaction of the resin of the paint starts in the heating pattern of the steel strip in the oven of a continuous coating line. At a temperature of 10°C or more and below the boiling point of the solvent by 10°C.
It is characterized by being held at a temperature of 10 to 30 degrees Celsius for a period of 10 seconds or more and 25 seconds or less.
［作用］
この発明に係る金属ストリップの加熱方法の作用及び加
熱途中の保持温度と時間の限定理由についてのべる。[Function] The function of the metal strip heating method according to the present invention and the reasons for limiting the holding temperature and time during heating will be described.
（１）樹脂の架橋反応が開始する温度を１０℃以上下ま
わる温度で保持する理由は、樹脂の架橋反応が開始する
温度を１０℃以上下まわる温度で保持しなければ樹脂の
架橋反応が開始するおそれがあり、樹脂の架橋反応が開
始してしまうと溶剤の蒸発による「ワキ」を引起こすか
らである。(1) The reason for maintaining the temperature at least 10°C below the temperature at which the crosslinking reaction of the resin starts is because if the temperature is not kept at least 10°C below the temperature at which the crosslinking reaction of the resin starts, the crosslinking reaction of the resin will start. This is because, if the crosslinking reaction of the resin starts, "flanking" may occur due to evaporation of the solvent.
（２）溶剤の沸点を１０℃乃至３０℃下まわる温度で保
持する理由は、沸点を１０℃以上下まわる温度で保持し
なければ溶剤の激しい蒸発による「ワキ」を引起こすか
らである。又溶剤の沸点を３０℃以上下まわる温度で保
持した場合は溶剤の蒸発が極めて緩慢になり、保持の効
果が期待できないからである。(2) The reason why the boiling point of the solvent is maintained at a temperature of 10°C to 30°C is that if the boiling point is not maintained at a temperature of 10°C or more below, "flanking" will occur due to violent evaporation of the solvent. Furthermore, if the boiling point of the solvent is maintained at a temperature 30° C. or more below, the evaporation of the solvent becomes extremely slow, and no retention effect can be expected.
（３）保持時間は塗膜の厚みに伴って増減させるもので
あるが、連続塗装ラインのロールコータ−による−回の
塗装厚みに制約があり、結果として１５秒乃至２５秒が
「ワキＪを引起こさない且つ充分な保持時間である事を
経験上確認した。(3) The holding time increases or decreases depending on the thickness of the coating film, but there is a limit to the coating thickness of each roll coater on a continuous coating line, and as a result, 15 to 25 seconds It has been confirmed through experience that this does not occur and the retention time is sufficient.
この保持条件によって塗料のｔ＃ＪＪ１１の架橋反応が
開始する前に溶剤の揮発が終了し「ワキノに起因する泡
による塗膜欠陥が生じる事が無く、且つ加熱時間が短く
能率が向上する。With this holding condition, the volatilization of the solvent is completed before the crosslinking reaction of t#JJ11 of the paint starts, and coating film defects due to bubbles caused by wax do not occur, and the heating time is shortened and efficiency is improved.
［実施例］
以下にこの発明の実施例を図によって説明する。前述の
通り第２図に鋼ストリップの連続塗装ラインのオーブン
とその周辺を示す０図において鋼ストリップ８は表面の
予備処理（図示せず）された後入側プライドルロール６
を経てロールコタ−４に到る。ロールコータ−４におい
て鋼ストリップ８は表面に塗装される。塗装された鋼ス
トリップ８はオーブン１の内において塗料が加熱乾燥さ
れる。加熱乾燥が完了するまで鋼ストリップ８は長いカ
テナリー７を構成しておりロール及びそのため構造物に
接触することのない構造となっている。加熱乾燥が完了
した後オーブン１を出てパスラインロール２に到る。鋼
ストリップ８は冷却帯３を経て出側プライドルロール５
に到る。[Examples] Examples of the present invention will be described below with reference to the drawings. As mentioned above, in Fig. 2, which shows the oven and its surroundings in a continuous coating line for steel strips, the steel strip 8 is coated with a post-input side priddle roll 6 whose surface has been pretreated (not shown).
After that, it reaches Roll Cotter 4. In the roll coater 4 the steel strip 8 is coated on the surface. The painted steel strip 8 is heated and dried in the oven 1. Until heating and drying is complete, the steel strip 8 constitutes a long catenary 7 which does not come into contact with the rolls and therefore with the structure. After heating and drying is completed, the film leaves the oven 1 and reaches the pass line roll 2. The steel strip 8 passes through the cooling zone 3 and then passes through the exit priddle roll 5.
reach.
第３図はオーブンの内において塗料が加熱乾燥される過
程における塗料が変化する状況を示す説明図である。ｍ
ｆ４は樹脂、顔料、溶剤で構成される。＃１き付けによ
り（１）塗装完了、（２）溶剤揮発、（３）架橋反応、
（４〉硬化の順序で硬化する、ここにおいて（２〉溶剤
揮発、（３）架橋反応の二つの領域は、オーバーラツプ
しており、急速加熱すると溶剤の激しい蒸発による「ワ
キ」に起因する泡による塗膜欠陥が生じる。この現象は
溶剤分が多く、厚膜タイプの塗装の場合に発生しやすい
、一方塗膜の粘度は、溶剤揮発に伴って上昇して、溶剤
揮発が終ると温度上昇に伴って流動性を増し、粘度は一
時的に下がりその後に架橋反応と硬化に従って粘度は増
し、堅固な塗膜を完成する。FIG. 3 is an explanatory diagram showing how the paint changes during the process of heating and drying the paint in an oven. m
f4 is composed of resin, pigment, and solvent. By applying #1, (1) painting is completed, (2) solvent volatilization, (3) crosslinking reaction,
(4) Curing occurs in the order of curing, in which the two regions of (2) solvent volatilization and (3) crosslinking reaction overlap, and rapid heating causes bubbles caused by "wax" due to intense evaporation of the solvent. Paint film defects occur.This phenomenon is more likely to occur in thick film type paints with a high solvent content.On the other hand, the viscosity of the paint film increases as the solvent evaporates, and once the solvent evaporates, the temperature rises. As a result, the fluidity increases and the viscosity temporarily decreases, followed by a crosslinking reaction and curing, which increases the viscosity to complete a firm coating.
第１図はこの発明係る、鋼ストリップの加熱方法を実線
の折線で示した。＃ｌストリップの温度は、１５秒間で
１００℃に昇熱する０次いで鋼ストリップの温度は、１
００℃において１５秒間保持され”る、この１００℃に
保持される１５秒間に塗膜中の溶剤は揮発する。更に鋼
ストリップの温度は、１５秒間で２４０℃に昇熱する。FIG. 1 shows the method of heating a steel strip according to the present invention using solid broken lines. #l The temperature of the strip increases to 100°C in 15 seconds.Then the temperature of the steel strip increases to 1
During this 15 seconds of holding at 100°C, the solvent in the coating evaporates.Furthermore, the temperature of the steel strip increases to 240°C in 15 seconds.
ｖ１膜中の溶剤は揮発し終っているので、ここにおける
急速な昇熱によっても溶剤の激しい蒸発による「ワキ」
に起因する泡による塗膜欠陥が生じる事はない、第１図
に点線の折線で従来の昇熱のヒートパターンを示した。Since the solvent in the v1 film has finished volatilizing, even the rapid heat rise here will cause "armpits" due to violent evaporation of the solvent.
In Figure 1, the dotted broken line shows the conventional heating pattern.
なおこの実施例における塗膜の条件は次ぎのとおりであ
る。The conditions of the coating film in this example are as follows.
〈１〉塗膜の膜厚は、プライマーが５μであり、上塗の
膜厚は１５μである。<1> The thickness of the coating film is 5 μm for the primer and 15 μm for the top coat.
（２）ｔ１！料は、アクリル系であり、樹脂の架橋反応
が開始する温度は、１３０℃である。溶剤の沸点は１２
０℃である。(2) t1! The material is acrylic, and the temperature at which the crosslinking reaction of the resin starts is 130°C. The boiling point of the solvent is 12
It is 0°C.
（３）ストリップの寸法は、板厚０．４關、板中１ｍで
ある。（４）ライン速度は、この発明係る加熱方法の場
合６０ｍｐｉ＋、従来の加熱方法の場合４５ｍｐ−であ
った。(3) The dimensions of the strip are 0.4 mm thick and 1 m deep. (4) The line speed was 60 mpi+ for the heating method according to the present invention and 45 mp- for the conventional heating method.
この発明係る加熱方法によると、能率は２５％向上し、
且つ急速加熱しても溶剤の激しい蒸発による「ワキ」に
起因する泡による塗膜欠陥が生じる事はなかった。According to the heating method according to this invention, efficiency is improved by 25%,
Moreover, even with rapid heating, no coating film defects were caused by bubbles caused by "flanks" caused by intense evaporation of the solvent.
［発明の効果］
この発明に係る。オーブンにおける金属ストリップ加熱
方法によれば、急速加熱しても溶剤の激しい蒸発による
「ワキ」に起因する泡による塗膜欠陥が生じる。事はな
いので、能率は向上し、且つ厚い塗膜の塗装の場合でも
平滑な塗膜の表面がえられた。[Effect of the invention] According to this invention. According to the method of heating the metal strip in an oven, even with rapid heating, coating defects occur due to bubbles caused by "wax" due to vigorous evaporation of the solvent. Since there were no problems, efficiency was improved and a smooth coating surface was obtained even when painting a thick coating.
第１図はこの発明の一実施例の鋼ストリップの加熱方法
を実線の折線で示したグラフ及び従来の昇熱のヒートパ
ターンを点線の折線で示したグラフからなる説明図、第
２図は鋼ストリップの連続塗装ラインのオーブンとその
周辺を示す説明図、第３図はオーブンの内において塗料
が加熱乾燥される過程における塗料が変化する状況を示
す説明図である。
１・・・オーブン、２・・・パスラインロール、３・・
・冷却帯、４・・・ロールコータ−１５・・・出側プラ
イドルロール、６・・・入側プライドルロール、７・・
・カテナリー、８・・・鋼ストリップ。FIG. 1 is an explanatory diagram consisting of a graph showing a heating method for a steel strip according to an embodiment of the present invention using a solid broken line, and a graph showing a conventional heat raising heat pattern using a dotted broken line. FIG. 3 is an explanatory view showing an oven and its surroundings in a continuous strip coating line. FIG. 3 is an explanatory view showing how the paint changes during the process of heating and drying the paint in the oven. 1... Oven, 2... Pass line roll, 3...
・Cooling zone, 4... Roll coater 15... Output side priddle roll, 6... Input side priddle roll, 7...
- Catenary, 8... Steel strip.
Claims (1)
昇熱のヒートパターンにおいて、塗料の樹脂の架橋反応
が開始する温度を１０℃以上下まわる温度で且つ溶剤の
沸点を１０℃乃至３０℃下まわる温度で、１０秒以上２
５秒以下の時間保持する事を特徴とする金属ストリップ
の加熱方法。In the heat pattern of the heating of the metal strip in the oven of a continuous coating line, at a temperature of 10 °C or more below the temperature at which the crosslinking reaction of the resin of the paint starts and at a temperature of 10 °C to 30 °C below the boiling point of the solvent, 2 or more seconds
A method for heating a metal strip, characterized by holding the metal strip for a time of 5 seconds or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21195289A JPH0377675A (en) | 1989-08-17 | 1989-08-17 | Heating method for metallic strip in oven of continuously-coating line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21195289A JPH0377675A (en) | 1989-08-17 | 1989-08-17 | Heating method for metallic strip in oven of continuously-coating line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0377675A true JPH0377675A (en) | 1991-04-03 |
Family
ID=16614413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21195289A Pending JPH0377675A (en) | 1989-08-17 | 1989-08-17 | Heating method for metallic strip in oven of continuously-coating line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0377675A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006006717A1 (en) * | 2004-07-14 | 2006-01-19 | Nippon Steel Corporation | Method of applying multilayer coating film and product with multilayer coating film |
| JP2014530102A (en) * | 2011-10-17 | 2014-11-17 | 宝山鋼鉄股▲分▼有限公司 | Method for producing an extremely thick insulating coating on the surface of electromagnetic steel |
-
1989
- 1989-08-17 JP JP21195289A patent/JPH0377675A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006006717A1 (en) * | 2004-07-14 | 2006-01-19 | Nippon Steel Corporation | Method of applying multilayer coating film and product with multilayer coating film |
| CN101018615A (en) * | 2004-07-14 | 2007-08-15 | 新日本制铁株式会社 | Method of applying multilayer coating film and product with multilayer coating film |
| US7754289B2 (en) | 2004-07-14 | 2010-07-13 | Nippon Steel Corporation | Method for coating a multilayer film and product having a multilayer coated film |
| JP4818923B2 (en) * | 2004-07-14 | 2011-11-16 | 新日本製鐵株式会社 | Multilayer coating method and product having multilayer coating |
| US8147950B2 (en) | 2004-07-14 | 2012-04-03 | Nippon Steel Corporation | Method for coating a multilayer film and product having a multilayer coated film |
| JP2014530102A (en) * | 2011-10-17 | 2014-11-17 | 宝山鋼鉄股▲分▼有限公司 | Method for producing an extremely thick insulating coating on the surface of electromagnetic steel |
| US9406416B2 (en) | 2011-10-17 | 2016-08-02 | Baoshan Iron & Steel Co., Ltd | Method of producing extremely thick insulation coating on surface of electrical steel |
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