JP2543287B2 - Roller marker coating film thickness control method - Google Patents
Roller marker coating film thickness control methodInfo
- Publication number
- JP2543287B2 JP2543287B2 JP4132805A JP13280592A JP2543287B2 JP 2543287 B2 JP2543287 B2 JP 2543287B2 JP 4132805 A JP4132805 A JP 4132805A JP 13280592 A JP13280592 A JP 13280592A JP 2543287 B2 JP2543287 B2 JP 2543287B2
- Authority
- JP
- Japan
- Prior art keywords
- film thickness
- roll
- coating
- coating film
- control method
- 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 - Lifetime
Links
Landscapes
- Coating Apparatus (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ローラーカーテンコー
タ塗膜厚制御方法に関するもので、特に常に一定の膜厚
を得られる塗膜厚制御方法を目的とする。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a roller curtain coater coating film thickness control method, and particularly to a coating film thickness control method capable of always obtaining a constant film thickness.
【０００２】[0002]
【従来の技術】塗装方式としてロールコータ方式が一般
的であるが、通常の塗装ラインによる塗膜厚制御方法は
以下のようである。中央ラインスピード速度変更指令が
ｉ／ｐされると、ロールコータ塗膜厚制御式に従ってロ
ール周速がラインスピードとともに変化し、一定の膜厚
を得られる制御方法となっている。ロールコータ塗装は
鋼板との接触塗装であるため上記制御方法で特に問題が
ない。［ｉ／ｐ＝入力］2. Description of the Related Art A roll coater method is generally used as a coating method, and a method for controlling a coating film thickness on a normal coating line is as follows. When the central line speed / speed change command is i / p, the roll peripheral speed changes with the line speed according to the roll coater coating film thickness control formula, so that a constant film thickness can be obtained. Since the roll coater coating is a contact coating with a steel sheet, there is no particular problem with the above control method. [I / p = input]
【０００３】[0003]
【発明が解決しようとする課題】しかして、ラインスピ
ード加減速時において塗膜厚を一定に保つためにローラ
ーカーテンの塗装ロール周速を変化させるが、コイルと
の非接触塗装方式であるため塗装ロール周速を変化させ
てから鋼板上に塗膜厚が変化するまで約１〜３秒かかる
事が確認されている。この膜厚の応答遅れは、鋼板上の
塗膜厚上に以下に示す大きな影響を及ぼす。 厚膜厚発生による未焼付部分の発生→コータ以降の
ロールへの付着等 厚膜厚部分のワキ発生 膜厚不合部分の発生However, although the peripheral speed of the coating roll of the roller curtain is changed in order to keep the coating thickness constant during line speed acceleration / deceleration, the coating is performed because it is a non-contact coating method with the coil. It has been confirmed that it takes about 1 to 3 seconds until the coating film thickness changes on the steel sheet after the roll peripheral speed is changed. This film thickness response delay has a great influence on the thickness of the coating film on the steel sheet as described below. Generation of unbaked part due to generation of thick film → Adhesion to roll after coating, etc. Occurrence of crack in thick film part Occurrence of inconsistent film thickness
【０００４】[0004]
【課題を解決するための手段】本発明は従来技術のこの
ような課題を有利に解決するものであって、ローラーカ
ーテンコータ塗装はコイルとの非接触塗装であるため、
膜厚変更時塗装ロール周速を変化させてから（ローラー
カーテンコータは塗装ロールの加減速にて膜厚変更）鋼
板上の膜厚が変化するまでに一定の遅れ時間が生じる。
応答遅れ時間分だけ鋼板上は一定の膜厚（狙い膜厚）は
得られず、厚膜厚による未焼付部分の発生等コータ以降
に悪影響を及ぼすと考えられる。そこで本発明者らは、
膜厚の制御方法の検討を行ない常に一定の膜厚を得られ
る制御方法を得るべく検討した結果、本発明を完成した
ものである。The present invention advantageously solves the above problems of the prior art, and the roller curtain coater coating is a non-contact coating with a coil.
When changing the coating roll peripheral speed when changing the film thickness (the roller curtain coater changes the film thickness by accelerating and decelerating the coating roll), a constant delay time occurs until the film thickness on the steel plate changes.
A constant film thickness (target film thickness) cannot be obtained on the steel plate by the response delay time, and it is considered that the thick film thickness has an adverse effect on the coater and thereafter, such as generation of an unbaked portion. Therefore, the present inventors
The present invention has been completed as a result of studying a method of controlling the film thickness and studying to obtain a control method that can always obtain a constant film thickness.
【０００５】即ち、本発明は、流下する塗装カーテンを
通過させて被塗装物に塗膜を形成するカーテンコーター
の塗膜厚制御方法において、コータのロール周速条件を
変化させてから一定時間遅らせてラインスピードを変化
させて塗膜厚を制御する事を特徴とするローラーカーテ
ン塗膜厚制御方法を要旨とする。That is, according to the present invention, in a coating film thickness control method of a curtain coater for forming a coating film on an object to be coated by passing it through a coating curtain flowing down, the roll peripheral speed condition of the coater is changed and then delayed for a predetermined time. The gist is a roller curtain coating film thickness control method characterized by controlling the coating film thickness by changing the line speed.
【０００６】[0006]
【実施例】以下、図面に基づいて本発明を説明する。図
１は本発明の実施例を示す。コイル（鋼帯）９はブライ
ドルロール１を通り、デフレクタロール２とロールコー
タバックアップロール３とを介して焼付炉８を通る。焼
付炉８をコイル９が通過する前にローラーカーテンコー
タにて塗料が塗布される。ここに塗布される塗料は家電
向け（冷蔵庫外板、洗濯機等）に使用される高分子ポリ
エステル系のトップコート塗料で、加工性、耐汚染性、
接着性等に優れるものである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of the present invention. The coil (steel strip) 9 passes through the bridle roll 1, and the deflector roll 2 and the roll coater backup roll 3 through the baking furnace 8. The paint is applied by a roller curtain coater before the coil 9 passes through the baking oven 8. The paint applied here is a high molecular polyester top coat paint used for home appliances (refrigerator outer plates, washing machines, etc.) and has good processability, stain resistance, and
It has excellent adhesiveness.
【０００７】塗料は泡排器７に供給されカーテン安定条
件に大きく影響する微小気泡が取り除かれる。泡排器７
を通過した塗料はローラーカーテンコータ塗装機の２つ
のロールのうちドクターロール５上に供給される。塗装
ロール４とドクターロール５の間に溜まった塗料だまり
は、ロール間のギャップ部分を通過し塗装ロール下部に
設置された塗装ロールブレード６にてかきとられ塗料の
カーテンを形成し、カーテン中を通過するコイル（鋼
帯）９上に塗布される。コイル（鋼帯）９上に塗布され
る塗料１０の膜厚は、各塗料の物性値（比重、粘度）、
塗装ロール４とドクターロール５間のギャップ、ロール
の回転数、ラインスピードにて制御される。The paint is supplied to the bubble ejector 7 to remove the minute bubbles that greatly affect the curtain stability condition. Bubble ejector 7
The paint that has passed through is supplied onto the doctor roll 5 of the two rolls of the roller curtain coater coater. The paint pool accumulated between the paint roll 4 and the doctor roll 5 passes through the gap between the rolls and is scraped off by the paint roll blade 6 installed at the lower part of the paint roll to form a curtain of paint. It is applied on the passing coil (steel strip) 9. The film thickness of the paint 10 applied on the coil (steel strip) 9 depends on the physical properties (specific gravity, viscosity) of each paint,
It is controlled by the gap between the coating roll 4 and the doctor roll 5, the rotation speed of the roll, and the line speed.
【０００８】図２、３に図１のラインに使用される塗料
において、ローラーカーテンコータ塗装ロール４周速の
減少にともなうコイル（鋼帯）９上の膜厚の変動結果を
示した。図は横軸に時間、左縦軸には鋼板上のドライ膜
厚、右縦軸には塗装ロール４の周速の変動を示した。図
２において４０mpm で一定に保たれていた塗装ロール４
を時間９ｓの時点で減速を開始し、約２秒間かけて２
７．５mpm まで減速した。鋼板上のドライ膜厚は２５μ
m ほぼ一定に保たれていたが、塗装ロール４の周速が減
少後１．５ｓ後に膜厚が減少してくる事が確認された。FIGS. 2 and 3 show the results of the change in the film thickness on the coil (steel strip) 9 with the decrease in the peripheral speed of the roller curtain coater coating roll 4 in the paint used in the line of FIG. In the figure, the horizontal axis shows time, the left vertical axis shows the dry film thickness on the steel plate, and the right vertical axis shows the fluctuation of the peripheral speed of the coating roll 4. The coating roll 4 which was kept constant at 40 mpm in Fig. 2
Will start decelerating at the time of 9 s,
Slowed down to 7.5 mpm. Dry film thickness on steel plate is 25μ
m was kept almost constant, but it was confirmed that the film thickness decreased 1.5 s after the peripheral speed of the coating roll 4 decreased.
【０００９】図３においては４８mpm で一定に保たれて
いた塗装ロール４を時間１０．５ｓの時点で減速を開始
し、約２．５ｓかけて２７．５mpm まで減速した。鋼板
上のドライ膜厚はほぼ２０μm 前後で一定に保たれてい
たが、塗装ロール４の周速が減少後２．２ｓ後に膜厚が
減少してくる事が確認された。In FIG. 3, the coating roll 4, which was kept constant at 48 mpm, started decelerating at the time of 10.5 s, and decelerated to 27.5 mpm in about 2.5 s. The dry film thickness on the steel sheet was kept constant at around 20 μm, but it was confirmed that the film thickness decreased after 2.2 s after the peripheral speed of the coating roll 4 decreased.
【００１０】図４は本発明によるブライドルロール回転
数、塗装ロール周速、カーテン吐出量、膜厚と時間との
関係を示す図である。中央ラインスピードはライン中の
ブライドルロール１にて制御される。ラインスピード７
０mpm で通板中減速指令がｉ／ｐされると、中央ライン
スピードの減速はただちには開始されず、図２に示す塗
料Ａに関しては１．５s 、図３に示す塗料Ｂについては
２．２ｓ遅れて減速が開始される。またラインスピード
の増速指令がｉ／ｐされると減速同様塗料Ａに関しては
１．５ｓ、塗料Ｂに関しては２．２ｓ遅れてラインスピ
ードの増速の開始が行われる。塗装ロール周速はライン
スピード７０mpm において３０mpm を示している。ライ
ンスピード減速、加速指令と同時に膜厚制御式によって
決定した回転数に変化しコイル（鋼帯）９の膜厚をコン
トロールする。カーテンの吐出量は塗装ロール回転数の
変化に影響するものであり、ロール周速と同時に減少、
増加される。コイル（鋼帯）９上の膜厚は一定（２０μ
m ）に保たれる。FIG. 4 is a diagram showing the relationship between the bridle roll rotation speed, the coating roll peripheral speed, the curtain discharge amount, the film thickness, and the time according to the present invention. The central line speed is controlled by the bridle roll 1 in the line. Line speed 7
When the deceleration command during passing is i / p at 0 mpm, deceleration of the central line speed does not start immediately, 1.5 s for paint A shown in FIG. 2 and 2.2 s for paint B shown in FIG. The deceleration starts after a delay. When the line speed increase command is i / p, the line speed increase is started with a delay of 1.5 s for the paint A and 2.2 s for the paint B, similarly to deceleration. The peripheral speed of the coating roll is 30 mpm at a line speed of 70 mpm. Simultaneously with the line speed deceleration and acceleration commands, the film thickness of the coil (steel strip) 9 is controlled by changing the rotation speed determined by the film thickness control formula. The discharge amount of the curtain affects the change of the coating roll rotation speed, and decreases at the same time as the roll peripheral speed.
Will be increased. The film thickness on the coil (steel strip) 9 is constant (20μ
m).
【００１１】[0011]
【発明の効果】以上説明した本発明の塗膜厚制御方法に
よれば、塗装ロール回転数とラインスピードとの時間差
をもつ制御方法を導入することにより、上記した従来の
問題点を全て解決することが可能となり、常に一定の膜
厚が安定して得られるようになった。According to the coating film thickness control method of the present invention described above, all of the above-mentioned conventional problems can be solved by introducing a control method having a time difference between the coating roll rotation speed and the line speed. It has become possible to obtain a stable and constant film thickness.
【図１】本発明を実施するためのローラーカーテンコー
タ設備の概略図。FIG. 1 is a schematic diagram of a roller curtain coater facility for carrying out the present invention.
【図２】塗装ロール周速の減少にともなう塗膜厚の変動
結果を示す図。FIG. 2 is a view showing a result of a change in coating film thickness with a decrease in coating roll peripheral speed.
【図３】同じく塗装ロール周速の減少にともなう塗膜厚
の変動結果を示す図。FIG. 3 is a diagram showing a variation result of the coating film thickness with a decrease in the peripheral speed of the coating roll.
【図４】本発明によるブライドルロール回転数、塗装ロ
ール周速、カーテン吐出量、膜厚と時間との関係を示す
図。FIG. 4 is a diagram showing a relationship between a bridle roll rotation speed, a coating roll peripheral speed, a curtain discharge amount, a film thickness, and time according to the present invention.
１ ブライドルロール ２ デフレクタロール ３ ロールコータバックアップロール ４ 塗装ロール ５ ドクターロール ６ 塗装ロールブレード ７ 泡排器 ８ 焼付炉 ９ コイル（鋼帯） １０ 塗料 1 Bridle Roll 2 Deflector Roll 3 Roll Coater Backup Roll 4 Coating Roll 5 Doctor Roll 6 Painting Roll Blade 7 Bubble Discharger 8 Baking Furnace 9 Coil (Steel Strip) 10 Paint
Claims (1)
装物に塗膜を形成するカーテンコータの塗膜厚制御方法
において、コータのロール周速条件を変化させてから一
定時間遅らせてラインスピードを変化させて塗膜厚を制
御する事を特徴とするローラーカーテンコータ塗膜厚制
御方法。1. A method for controlling a coating film thickness of a curtain coater, wherein a coating film is formed on an object to be coated by passing through a coating curtain flowing down, and a line speed is delayed by changing a roll peripheral speed condition of the coater for a predetermined time. A roller curtain coater coating film thickness control method characterized by varying the coating film thickness to control the coating film thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4132805A JP2543287B2 (en) | 1992-05-25 | 1992-05-25 | Roller marker coating film thickness control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4132805A JP2543287B2 (en) | 1992-05-25 | 1992-05-25 | Roller marker coating film thickness control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05317795A JPH05317795A (en) | 1993-12-03 |
| JP2543287B2 true JP2543287B2 (en) | 1996-10-16 |
Family
ID=15089994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4132805A Expired - Lifetime JP2543287B2 (en) | 1992-05-25 | 1992-05-25 | Roller marker coating film thickness control method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2543287B2 (en) |
-
1992
- 1992-05-25 JP JP4132805A patent/JP2543287B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05317795A (en) | 1993-12-03 |
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