JP3477882B2 - Die coating method - Google Patents
Die coating methodInfo
- Publication number
- JP3477882B2 JP3477882B2 JP01608395A JP1608395A JP3477882B2 JP 3477882 B2 JP3477882 B2 JP 3477882B2 JP 01608395 A JP01608395 A JP 01608395A JP 1608395 A JP1608395 A JP 1608395A JP 3477882 B2 JP3477882 B2 JP 3477882B2
- Authority
- JP
- Japan
- Prior art keywords
- die
- coating
- strip
- backup roll
- roll
- 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
- Application Of Or Painting With Fluid Materials (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明はダイコーティング方法に
関するものであり、特にダイコーティングにより形成さ
れる塗膜が所望の品質を有するようにダイの位置を制御
する方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a die coating method, and more particularly to a method for controlling the position of a die so that a coating film formed by the die coating has a desired quality.
【0002】[0002]
【従来の技術】ダイコーティングは、在来のロールコー
ティングに比し、多くの利点を有しているので、その適
用範囲の拡大が計られている。ダイコーティングにおい
ては、バックアップロールに部分的に巻回して走行して
いる帯状物(=被塗装物)に対し、帯状物がバックアッ
プロール上にある間に塗装を行なう方式(=オポジット
方式)と、帯状物がバックアップロールから離れた位置
にある間に塗装を行なう方式(=フリースパン方式)と
がある。特開平4−338262号には、この2つの方
式を、ロールの位置を移動させることにより、一台のダ
イコーティング装置で実施する技術が記載されている。
すなわち、この特開平4−338262号によれば、バ
ックアップロールに対し、その下流側でかつバックアッ
プロールよりも上方位置に支持ロールを設置し、バック
アップロールの回転軸を含む水平面ないしはその近傍に
ダイの吐出端を位置させ、且つバックアップロールを通
過した帯状物が、ダイと同じ側又はダイの反対側に傾斜
しつつ走行しうるように、支持ロールを前後(ダイと同
じ側又はダイの反対側)に移動しうるようにする。この
装置でオポジット方式で塗装を行なうには、支持ロール
をダイと反対側に移動させて、塗装直後の帯状物がバッ
クアップロールに巻き付いて走行するようにする。ま
た、フリースパン方式で塗装を行なうには、支持ロール
をダイと同じ側に移動させて、塗装前に帯状物がバック
アップロールから離れるようにする。帯状物がダイから
どの程度離れた位置で塗装が行なわれるかは、バックア
ップロールの直径、バックアップロールの回転軸を含む
水平面とダイの吐出端との位置関係及び支持ロールの位
置により決定されるが、一般には帯状物がダイから離れ
て30mm以上走行しない間に塗装が行なわれる。この
ような位置で塗装を行なうと、通常のフリースパン方式
に比し、特有の利点がある(特開平4−118076参
照)。2. Description of the Related Art Since die coating has many advantages over conventional roll coating, its range of application is being expanded. In die coating, there is a method (= opposite method) of coating a belt-like object (= object to be coated) that is partially wound around a backup roll while the belt-like object is on the backup roll, There is a method (= free span method) in which coating is performed while the belt-shaped material is located away from the backup roll. Japanese Unexamined Patent Publication No. 4-338262 describes a technique in which these two methods are carried out by a single die coating apparatus by moving the position of the roll.
That is, according to this Japanese Unexamined Patent Publication No. 4-338262, a support roll is installed downstream of the backup roll and above the backup roll, and a die is provided on a horizontal plane including the rotation axis of the backup roll or in the vicinity thereof. The support roll is moved forward and backward (on the same side as the die or on the opposite side of the die) so that the strip that has positioned the discharge end and has passed through the backup roll can travel while inclining to the same side as the die or the opposite side of the die. To be able to move to. In order to perform the opposite type coating with this apparatus, the support roll is moved to the side opposite to the die so that the strip immediately after coating is wrapped around the backup roll to run. Further, in the case of performing coating by the free span method, the support roll is moved to the same side as the die so that the strip is separated from the backup roll before coating. How far away from the die the coating is applied is determined by the diameter of the backup roll, the positional relationship between the horizontal plane including the rotation axis of the backup roll and the discharge end of the die, and the position of the support roll. Generally, the coating is performed while the strip does not run away from the die by more than 30 mm. Coating at such a position has a unique advantage over the ordinary free span method (see Japanese Patent Laid-Open No. 4-118076).
【0003】[0003]
【発明が解決しようとする課題】通常のオポジット方式
及び上述の特開平4−338262号のオポジット−フ
リースパン切替方式では、ダイの吐出端はバックアップ
ロールに近接して設置されており、ダイの吐出端とバッ
クアップロールとの間隙を帯状物が通過する。そして塗
膜の厚さや塗膜の品質の制御は、ダイの吐出端とバック
アップロールとの間隙を調節することによりなされる。
オポジット方式の場合には、この間隙が広くなると塗膜
が厚くなるが、広くなり過ぎると塗膜がさざなみ状とな
ることがある。また上述の特開平4−338262号に
よるフリースパン方式の場合には、この間隙が広すぎる
と塗膜にはげ状の欠陥が生ずる。この現象は、特に高速
で塗装を行なう場合に発生しやすい。In the ordinary opposite method and the above-mentioned opposite-free span switching method of Japanese Patent Laid-Open No. 4-338262, the ejection end of the die is installed close to the backup roll, and the ejection of the die is performed. The strip passes through the gap between the edge and the backup roll. The thickness of the coating film and the quality of the coating film are controlled by adjusting the gap between the discharge end of the die and the backup roll.
In the case of the opposite method, if the gap is wide, the coating film becomes thick, but if it is too wide, the coating film may have a rippled shape. In the case of the free span method disclosed in Japanese Patent Laid-Open No. 4-338262, if the gap is too wide, the coating film will have bald defects. This phenomenon tends to occur particularly when coating is performed at high speed.
【0004】このような塗膜欠陥が生じた場合には、バ
ックアップロールに対してダイを前進させて、バックア
ップロールとダイの吐出端との間隙を適正な値に調整す
る必要がある。しかしダイの前進距離は通常数μ〜10
数μに過ぎず、しかもダイの吐出端とバックアップロー
ルとの間隙は極めて狭く、かつこの間隙を帯状物が走行
しているのであるから、ダイを前進させる際は、間隙が
狭くなりすぎないように、細心の注意を払いつつ慎重に
行なわなければならない。When such a coating defect occurs, it is necessary to advance the die with respect to the backup roll to adjust the gap between the backup roll and the discharge end of the die to an appropriate value. However, the advance distance of the die is usually several μ to 10
It is only a few μ, and the gap between the discharge end of the die and the backup roll is extremely narrow, and the belt-like material is running through this gap, so when moving the die forward, the gap should not become too narrow. In addition, it must be done with great care and caution.
【0005】[0005]
【課題を解決するための手段】本発明によれば、バック
アップロールに対してダイを前進又は後退させてダイと
バックアップロールとの間隔を調整する代りに、ダイを
その場所で上方又は下方に数mm移動させるだけで、ダ
イを前進又は後退させたのと同じ効果を奏することがで
きる。According to the present invention, instead of advancing or retracting the die relative to the backup roll to adjust the spacing between the die and the backup roll, the die is moved upward or downward in place. The same effect as moving the die forward or backward can be obtained by simply moving the die by mm.
【0006】本発明について更に詳細に説明すると、オ
ポジット塗装の場合には、ダイから吐出された塗料は、
ダイのリップとバックアップロール上の帯状物との間
で、図2の如き状態で塗料溜りを形成しているものと考
えられる。この状態において、塗料溜りの上端部(図中
Aの部分)の幅(=下流側リップと帯状物との間隙)が
大きくなると、塗料溜りの塗料が不足して、前述の如く
さざなみ状の塗膜欠陥が発生するものと考えられる。こ
の場合には、ダイを下方に移動させると、塗料溜りの上
端部の幅が狭くなり、あたかもダイを前進させたのと同
様となる。しかもダイの移動距離は、ダイを前進させて
A部を同じ幅にする場合に比して数百〜数千倍大きいの
で、その移動距離の調節は容易である。To explain the present invention in more detail, in the case of opposite coating, the coating material discharged from the die is
It is considered that the paint pool is formed between the lip of the die and the strip on the backup roll in the state as shown in FIG. In this state, if the width of the upper end portion (A portion in the figure) of the paint reservoir (= the gap between the downstream lip and the strip) becomes large, the paint in the paint reservoir runs short, and the ripple-shaped coating is applied as described above. It is considered that a film defect occurs. In this case, when the die is moved downward, the width of the upper end portion of the paint reservoir becomes narrow, which is as if the die were moved forward. Moreover, the moving distance of the die is several hundred to several thousand times larger than that in the case where the die is moved forward to make the width of the portion A the same, so that the moving distance can be easily adjusted.
【0007】これに加えて、ダイを下方に移動させた場
合には、塗料溜りの下端部(図中Bの部分)の幅が広く
なり、ダイを前進させた場合に比して塗料溜りの塗料の
保持量が多くなるので、塗布幅の全体に亘っての塗膜厚
さの均一化が計り易い。また、特開平4−338262
号のフリースパン方式の場合には、正常時には図3に示
す状態で塗装が行なわれている。このフリースパン方式
でダイとバックアップロールとの間隙が広すぎると、塗
膜にはげ状の欠陥が生ずるのは、図3において、ダイの
吐出端と帯状物との間に形成される塗料溜りの下端部が
大きすぎて表面張力で支えきれなくなり、帯状物に同伴
されてきた空気がここに部分的に入り込み、その部分の
塗料が不足するためであると考えられる。この場合に
は、ダイを上方に移動させると塗料溜りの下端部の大き
さが小さくなり、塗料の表面張力によりその形状を一定
維持できるので、空気が入りこんで塗膜にはげ状の欠陥
を生ずるのを防止できる。なお、上記では間隙を狭める
場合について説明したが、上下動により間隙を広げるこ
とができることは勿論であり、この場合にも前後動に比
し移動距離を大きくとることができ、従って制御がしや
すいという利益は同様に享受できる。なお、上下動の移
動距離は通常10mm以下、特に5mm以下であるが、
前後動の場合の数μm〜十数μmの移動距離に比べる
と、その大きさは十分に大きいと言える。In addition to this, when the die is moved downward, the width of the lower end portion (the portion B in the figure) of the paint reservoir becomes wider, and the paint deposit is larger than when the die is advanced. Since the amount of paint retained is large, it is easy to make the coating thickness uniform over the entire coating width. In addition, JP-A-4-338262
In the case of the No. Free span method, the coating is normally performed in the state shown in FIG. In this free span method, if the gap between the die and the backup roll is too wide, bald defects occur in the coating film because the paint pool formed between the discharge end of the die and the strip in FIG. It is considered that this is because the lower end portion is too large to be fully supported by the surface tension, the air entrained in the belt-like material partially enters there, and the paint in that portion runs short. In this case, when the die is moved upward, the size of the lower end of the paint pool becomes smaller, and the surface tension of the paint can maintain its shape constant, so that air enters and a bald defect occurs in the coating film. Can be prevented. Although the case of narrowing the gap has been described above, it is needless to say that the gap can be widened by moving up and down, and in this case as well, the moving distance can be made larger than that of the forward / backward movement, and thus the control is easy. The same benefits can be enjoyed. The vertical movement distance is usually 10 mm or less, especially 5 mm or less,
It can be said that the size is sufficiently larger than the moving distance of several μm to several tens of μm in the case of back and forth movement.
【0008】[0008]
【実施例】以下に実施例により本発明を更に具体的に説
明するが、本発明は以下の実施例に限定されるものでは
ない。
実施例1
図1の如きダイコーティング装置を用い、フリースパン
方式で、アミルニウム板への塗装を行なった。バックア
ップロールは直径350mmであり、その回転軸を含む
水平面より若干上方にダイの吐出口が配置されている。
ダイはマニホールドの直径20mm、ランド部の長さ5
0mm、ランド部の上下間隔300μmである。The present invention will be described in more detail with reference to the following examples, but the present invention is not limited to the following examples. Example 1 An amylnium plate was coated by a free span method using the die coating apparatus as shown in FIG. The backup roll has a diameter of 350 mm, and the discharge port of the die is arranged slightly above the horizontal plane including the rotation axis thereof.
The die has a manifold diameter of 20 mm and a land length of 5
It is 0 mm, and the vertical interval between lands is 300 μm.
【0009】厚さ0.13mm、幅910mmのアルミ
ニウム板(1100材)を50m/分で走行させ、バッ
クアップロールから2mm離れた点において両端を5m
mづつ残して塗装を行なった。アルミニウム板とダイ吐
出端との間隙を50μmに設定して、塗膜厚さ5μmを
目標に塗装を開始したところ、塗膜にはげ状の欠陥が発
生した。次いで、ダイを上方に2mm移動させた(これ
によりダイの吐出端とアルミニウム板との間隔は約25
μm短縮されたことになる)ところ、はげ状の欠陥は消
失し、良好な塗膜が形成された。なお、用いた塗料はポ
リエステル系であり、定量ポンプで塗膜厚さが5μmと
なるようにダイのマニホールドに供給した。An aluminum plate (1100 material) having a thickness of 0.13 mm and a width of 910 mm was run at 50 m / min, and both ends were 5 m at a point 2 mm away from the backup roll.
Painting was performed leaving m units. When the gap between the aluminum plate and the die discharge end was set to 50 μm and coating was started aiming for a coating thickness of 5 μm, bald defects occurred in the coating. Then, the die was moved upward by 2 mm (there was about 25 mm between the discharge end of the die and the aluminum plate).
However, the bald defects disappeared and a good coating film was formed. The paint used was a polyester system and was supplied to the manifold of the die by a metering pump so that the coating film thickness was 5 μm.
【0010】実施例2
実施例1で用いたダイコーティング装置で、支持ロール
をダイの反対側(図で右側)に移動させて、オポジット
方式でアルミニウム板に塗装を行なった。アルミニウム
板は厚さは0.5mm、幅1610mmの1100材で
あり、これを25m/分で走行させ、両端を5mmづつ
残して塗装を行なった。塗膜厚さ50μmを目標に塗装
を開始したが、塗膜にさざなみ状の欠陥が生じたので、
ダイを下方に2mm移動させたところ、さざなみ状の欠
陥は解消し、良好な塗膜が形成された。なお用いた塗料
にポリエステル系であり、定量ポンプで塗膜厚さが50
μmとなるように、ダイのマニホールドに供給した。Example 2 With the die coating apparatus used in Example 1, the support roll was moved to the opposite side of the die (right side in the figure), and the aluminum plate was coated by the opposite method. The aluminum plate was 1100 material having a thickness of 0.5 mm and a width of 1610 mm, which was run at 25 m / min and was coated with 5 mm left at each end. The coating was started aiming for a coating thickness of 50 μm, but since ripple-like defects occurred in the coating,
When the die was moved downward by 2 mm, the ripple-like defects were eliminated and a good coating film was formed. The paint used was polyester and the coating thickness was 50 with a metering pump.
It was supplied to the manifold of the die so as to have a thickness of μm.
【0011】[0011]
【発明の効果】本発明によれば、バックアップロールに
接近してダイの吐出端を設置するダイコーティングにお
いて、ダイとバックアップロールとの間隙の調整を容易
に行なうことができる。According to the present invention, in the die coating in which the discharge end of the die is installed close to the backup roll, the gap between the die and the backup roll can be easily adjusted.
【図1】本発明を実施するのに適したオポジット−フリ
ースパン切替方式のダイコーティング装置の模式図であ
る。FIG. 1 is a schematic view of an opposite-free span switching type die coating apparatus suitable for carrying out the present invention.
【図2】オポジット方式による塗装中のダイの吐出端部
分の模式図である。FIG. 2 is a schematic view of a discharge end portion of a die during coating by the opposite method.
【図3】オポジット−フリースパン切替方式のダイコー
ティング装置で、フリースパン方式による塗装中のダイ
の吐出端部分の模式図である。FIG. 3 is a schematic diagram of a discharge end portion of a die during coating by a free span method in an opposite-free span switching type die coating apparatus.
1 ダイ 2 ダイ吐出端の下流側リップ 3 ダイ吐出端の上流側リップ 4 ダイのランド部 5 帯状物 6 バックアップロール 7 支持ロール 1 die 2 Downstream lip of the die discharge end 3 Upstream lip of the die discharge end Land of 4 dies 5 strips 6 backup roll 7 Support roll
フロントページの続き (56)参考文献 特開 平8−57389(JP,A) 特開 昭62−273080(JP,A) 特開 平4−118076(JP,A) 特開 平4−338262(JP,A) 特開 平5−169000(JP,A) 特開 平4−100570(JP,A) 特開 平5−68927(JP,A) 特開 平3−38272(JP,A) 実開 昭52−27964(JP,U) (58)調査した分野(Int.Cl.7,DB名) B01D 1/00 - 7/26 B05C 5/00 - 5/04 Continuation of the front page (56) Reference JP-A-8-57389 (JP, A) JP-A-62-273080 (JP, A) JP-A-4-118076 (JP, A) JP-A-4-338262 (JP , A) JP 5-169000 (JP, A) JP 4-100570 (JP, A) JP 5-68927 (JP, A) JP 3-38272 (JP, A) 52-27964 (JP, U) (58) Fields surveyed (Int.Cl. 7 , DB name) B01D 1/00-7/26 B05C 5/00-5/04
Claims (5)
ールに部分的に巻回して走行している帯状物にダイから
塗料を吐出して塗装を行なうダイコーティング方法にお
いて、バックアップロールの回転軸とダイの吐出端を含
む平面がほぼ水平となるようにバックアップロールに近
接してダイを設置し、かつダイを上方又は下方に移動さ
せ、帯状物がバックアップロールから離れて未だ30m
m以上走行しない間に塗装を行ない、塗装直後の帯状物
がダイと同じ側に傾斜して走行することにより塗膜の品
質を制御することを特徴とする方法。1. A die coating method in which paint is discharged from a die onto a strip that is partially wound around a backup roll that is supported substantially horizontally and the coating is performed. plane including the discharge end is in proximity to the backup roller so as to be substantially horizontally is moved established the die, and the die above or below the
Then, still 30m strip is separated from the backed Ppuroru
A method of controlling the quality of a coating film by performing coating while the vehicle is not running for more than m and running the belt-shaped material immediately after coating inclined to the same side as the die.
とする請求項1に記載の方法。 2. The strip is an aluminum plate.
The method according to claim 1, wherein
ールに部分的に巻回して走行している帯状物にダイから
塗料を吐出して塗装を行なうダイコーティング方法にお
いて、帯状物がアルミニウム板であり、バックアップロ
ールの回転軸とダイの吐出端を含む平面がほぼ水平とな
るようにバックアップロールに近接してダイを設置し、
かつダイを上方又は下方に移動させることにより塗膜の
品質を制御することを特徴とする方法。3. A backup station which is supported substantially horizontally.
In a die coating method in which paint is discharged from a die onto a strip that is partially wound around and running on a roll, the strip is an aluminum plate, and the rotation axis of the backup roll and the discharge end of the die are Place the die close to the backup roll so that the plane containing it is almost horizontal,
And controlling the quality of the coating film by moving the die up or down.
塗装を行ない、且つ塗装直後の帯状物がダイと反対側に
傾斜して走行することを特徴とする請求項3記載の方
法。4. While the strip is on the backup roll
Performs coating, and a method according to claim 3, wherein the strip-like material immediately after coating, characterized in that the running inclined to the side opposite to the die.
以内であることを特徴とする請求項1ないし4のいずれ
かに記載の方法。5. The amount of movement of the die upward or downward is 10 mm.
The method according to any one of claims 1 to 4, wherein:
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP01608395A JP3477882B2 (en) | 1995-02-02 | 1995-02-02 | Die coating method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP01608395A JP3477882B2 (en) | 1995-02-02 | 1995-02-02 | Die coating method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH08206583A JPH08206583A (en) | 1996-08-13 |
JP3477882B2 true JP3477882B2 (en) | 2003-12-10 |
Family
ID=11906659
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP01608395A Expired - Lifetime JP3477882B2 (en) | 1995-02-02 | 1995-02-02 | Die coating method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3477882B2 (en) |
-
1995
- 1995-02-02 JP JP01608395A patent/JP3477882B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH08206583A (en) | 1996-08-13 |
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