JPH06433A - Coating apparatus - Google Patents
Coating apparatusInfo
- Publication number
- JPH06433A JPH06433A JP15788992A JP15788992A JPH06433A JP H06433 A JPH06433 A JP H06433A JP 15788992 A JP15788992 A JP 15788992A JP 15788992 A JP15788992 A JP 15788992A JP H06433 A JPH06433 A JP H06433A
- Authority
- JP
- Japan
- Prior art keywords
- slot
- liquid supply
- gap
- coating
- supply pocket
- 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 47
- 238000000576 coating method Methods 0.000 title claims abstract description 47
- 239000007788 liquid Substances 0.000 claims abstract description 32
- 238000009826 distribution Methods 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 4
- 238000007765 extrusion coating Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 2
- 108010010803 Gelatin Proteins 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005206 flow analysis Methods 0.000 description 1
- 229920000159 gelatin Polymers 0.000 description 1
- 239000008273 gelatin Substances 0.000 description 1
- 235000019322 gelatine Nutrition 0.000 description 1
- 235000011852 gelatine desserts Nutrition 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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
- B05C5/007—Slide-hopper coaters, i.e. apparatus in which the liquid or other fluent material flows freely on an inclined surface before contacting the work
Landscapes
- Coating Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はスロットより塗布液を流
出させるタイプ、例えばスライドホッパーあるいはエク
ストルージョン塗布装置に関し、詳しくは幅手方向流量
（膜厚）の均一性を高めた塗布装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a type in which a coating solution is caused to flow out from a slot, for example, a slide hopper or an extrusion coating apparatus, and more particularly to a coating apparatus having improved uniformity of flow rate (film thickness) in the width direction.
【０００２】[0002]
【発明の背景】スロットより塗布液を流出させて塗布す
るタイプの塗布装置としてはスライドホッパーあるいは
エクストルージョン塗布装置がよく知られている。BACKGROUND OF THE INVENTION A slide hopper or an extrusion coating device is well known as a coating device of a type in which a coating liquid is caused to flow out from a slot for coating.
【０００３】このような塗布装置における問題の１つは
幅手方向の膜厚の均一性の確保、すなわちスロットの幅
手方向の流量の均一性を高めることである。One of the problems in such a coating device is to secure the uniformity of the film thickness in the width direction, that is, to increase the uniformity of the flow rate in the width direction of the slot.
【０００４】このため従来より多くの改良法が提示され
ている。例えば特開昭47-13080号、特公昭48-18293号、特
開昭49-101455号、同51-30266号、特公昭55-35990号等に
開示されている。 図２は従来のスライドホッパーの断面図である。図は２
層同時塗布の場合であるが、送液パイプ13により塗布装
置の中央から供給された塗布液は幅手にひろがるポケッ
トといわれる空洞部14に入り、これを満たすことにより
幅手の吐出圧を均一にしてスロット15を通って傾斜して
いるスライド面16に出、このスライド面を流下してエッ
ジと呼ばれる塗布機端17に達し、ここでバックロール10
に抱かれて走行するウェブ12上にビード18と称する液溜
まりを介して塗布される。For this reason, many improved methods have been proposed. For example, it is disclosed in JP-A-47-13080, JP-B-48-18293, JP-A-49-101455, JP-A-51-30266 and JP-B-55-35990. FIG. 2 is a sectional view of a conventional slide hopper. The figure shows 2
In the case of simultaneous layer coating, the coating liquid supplied from the center of the coating device by the liquid feed pipe 13 enters the cavity 14 called a pocket that spreads across the width, and by filling this, the discharge pressure across the width is made uniform. Then, it goes out through the slot 15 to the inclined slide surface 16 and flows down this slide surface to the end 17 of the coater called an edge, where the back roll 10
It is applied onto the web 12 which is held by the web and runs through a liquid pool called a bead 18.
【０００５】しかしながら、従来のこのポケットのみで
は塗布液の幅手方向の流出量は必ずしも均一とはいえな
かった。However, the flow amount of the coating liquid in the width direction cannot always be said to be uniform with this conventional pocket alone.
【０００６】塗布装置は一般に複数の部材を組み合わせ
て構成され、その内部は幅の広いポケット部と幅の狭い
スロット部よりなっているが、各部材の寸法精度や部材
同士の組み立て精度の影響によりスロットから流れでる
塗布液の幅方向の流量分布が大きく変化してしまう。こ
れはスロットの間隙が200〜1000μm程度と非常に小さい
ため僅かな間隙の狂いが大きな影響を与えることによ
る。スロットの流動解析によると幅方向の流量の変化は
スロット間隙の変化の３倍になることが知られている。
すなわち300μmのスロットに対して５μmの間隙の狂い
がある場合、（機械精度1.67％）、流量分布はその３倍
の５％に達してしまう。これを避けるためにスロット部
の間隙を大きくすると均一な分布を得るためには塗布装
置そのものが巨大になってしまう。The coating device is generally constructed by combining a plurality of members, and the inside thereof is composed of a wide pocket portion and a narrow slot portion. However, due to the dimensional accuracy of each member and the assembly accuracy of the members, The distribution of the flow rate of the coating liquid flowing from the slot in the width direction changes greatly. This is because the slot gap is very small, about 200 to 1000 μm, and a slight gap deviation has a large effect. It is known from flow analysis of slots that the change in the flow rate in the width direction is three times the change in the slot gap.
That is, when there is a gap of 5 μm with respect to a slot of 300 μm (mechanical accuracy: 1.67%), the flow rate distribution reaches 5%, which is three times that. If the gap between the slot portions is increased to avoid this, the coating device itself will become huge in order to obtain a uniform distribution.
【０００７】図３はこのような問題に対する上記各種対
策の例を示す断面図である。FIG. 3 is a sectional view showing an example of the above-mentioned various measures against such a problem.
【０００８】同図（ａ）は特開昭47-13080号記載のもの
で供給口とスリットの間に少なくとも1つの鋭利な突縁
を塗布液が回るようにした例であり、同図（ｂ）は、特
開昭49-101455号記載の例で比較的幅広のスロットを持
ち、供給液が浸透管を通ってチャンバーに供給されるコ
ーターである。同図（ｃ）は特公昭55-35990号の記載例
で第１のチャンバーと第２のチャンバーの間を狭い断面
積（スリット部断面積よりも）で通過させたコーターの
例である。FIG. 1 (a) is an example described in Japanese Patent Laid-Open No. 47-13080, in which at least one sharp edge is provided between the supply port and the slit so that the coating solution can rotate. ) Is a coater which has a relatively wide slot and is an example described in JP-A-49-101455, in which a supply liquid is supplied to a chamber through a permeation tube. FIG. 7C shows an example of a coater in which the first chamber and the second chamber are passed with a narrow cross-sectional area (rather than the cross-sectional area of the slit portion) in the example described in JP-B-55-35990.
【０００９】これらの対策はいずれも塗布液をポケット
部において抵抗を与えることにより、幅方向の分布を均
一にしようとするものである。All of these measures are intended to make the distribution in the width direction uniform by giving resistance to the coating solution in the pocket portion.
【００１０】前記の通り、幅方向の流出量を均一にする
ためには、液に対する抵抗を高めること即ちスリット間
隙は狭い方が有効であるが、しかし間隙精度が強く影響
してしまい、これは狭い方が難しい。As described above, in order to make the outflow amount in the width direction uniform, it is effective to increase the resistance to the liquid, that is, it is effective that the slit gap is narrow, but the gap precision has a strong influence, and this The narrower is more difficult.
【００１１】幅方向の膜厚分布の精度向上については、
上記例にみられるように従来から種々検討はされている
が、未だ十分満足すべき対策は完成していないのが現状
である。For improving the accuracy of the film thickness distribution in the width direction,
Although various investigations have been made in the past as seen in the above example, the present situation is that measures that are not completely satisfactory have been completed.
【００１２】[0012]
【発明の目的】上記のような問題に対し、本発明の目的
は、スロットより塗布液を流出させるタイプ、例えばス
ライドホッパーあるいはエクストルージョン塗布装置に
おいて、幅手方向流量（膜厚）の均一性を高めた塗布装
置を提供することにある。SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to provide a uniform flow rate (film thickness) in the width direction in a type such as a slide hopper or an extrusion coating apparatus in which a coating solution flows out from a slot. It is to provide an improved coating device.
【００１３】[0013]
【発明の構成】本発明の上記目的は、内部給液ポケット
とそれに関連するスロット部を有し、該スロット中に少
なくとも１つの副給液ポケットを持ち、支持体表面に一
定量の塗布液を均一に塗布する塗布装置において、１つ
以上の副給液ポケットによって分割された２つ以上のス
ロット部の間隙をスロット出口に近い程広くすることを
特徴とする塗布装置により達成される。The above object of the present invention is to have an internal liquid supply pocket and an associated slot portion, and to have at least one sub liquid supply pocket in the slot so that a fixed amount of coating liquid can be applied to the surface of the support. In a coating apparatus for uniformly coating, the coating apparatus is characterized in that the gap between two or more slot portions divided by one or more sub-liquid supply pockets is made wider toward the slot outlet.
【００１４】以下、本発明について具体的に説明する。The present invention will be specifically described below.
【００１５】前記のように幅手方向の流出精度を上げる
ために、スロット間隙を狭くし、幅方向の抵抗を増やし
て流出量の均一性を上げようとすると間隙の製作精度の
影響を大きく受け、かえって均一性を損ねてしまうとい
う問題がでてくる。As described above, in order to improve the outflow accuracy in the width direction, if the slot clearance is narrowed and the resistance in the width direction is increased to increase the uniformity of the outflow amount, the manufacturing accuracy of the clearance is greatly affected. On the contrary, there is a problem that the uniformity is impaired.
【００１６】そこで、本発明においては、副給液ポケッ
トを持ち、このポケットの上下のスロットの間隙を変え
る方法をとった。即ちポケットの下側（流出口より遠い
方）のスロット間隙を狭くすることによって幅方向の分
布をある程度均一とし、その精度の影響を緩和するため
給液ポケットに入り、流出口に近いスロットはある程度
の広さの間隙とすることにより精度の影響をうけないよ
うにする方法をとったのである。Therefore, in the present invention, a method is adopted in which a sub liquid supply pocket is provided and the gap between the upper and lower slots of this pocket is changed. That is, the width of the distribution in the width direction is made uniform to some extent by narrowing the slot gap on the lower side of the pocket (away from the outlet), and in order to mitigate the influence of its accuracy, the slot enters the liquid supply pocket and the slot near the outlet has some extent. By making the gap as wide as possible, we adopted a method to prevent it from being affected by accuracy.
【００１７】図１は本発明方法の１例を示す説明用斜視
図である。FIG. 1 is an explanatory perspective view showing an example of the method of the present invention.
【００１８】同図において１は塗布液の送液パイプであ
り、このパイプから第１の給液ポケット２に入る。３は
第２の（副）給液ポケットであり、第１と第２の給液ポ
ケットの中間のスロット４の間隙ｄ2は塗布液に対して
幅方向に十分な抵抗を与えるように狭く製作する。第２
の（副）給液ポケットからスライド面５に至るスロット
６の間隙ｄ1は幅方向流出量分布に影響を与えない程度
に狭く、すなわちスロット４よりは広くする。In the figure, reference numeral 1 is a coating liquid feed pipe, through which a first liquid feed pocket 2 enters. 3 is a second (sub) liquid supply pocket, and the gap d 2 between the slots 4 in the middle of the first and second liquid supply pockets is made narrow so as to give a sufficient resistance in the width direction to the coating liquid. To do. Second
The gap d 1 of the slot 6 from the (sub) liquid supply pocket to the slide surface 5 is narrow enough not to affect the widthwise outflow distribution, that is, wider than the slot 4.
【００１９】即ちこの関係は下記の通りとするのであ
る。That is, this relationship is as follows.
【００２０】０＜（ｄ2−ｄ1）／ｄ2＜0.5 勿論副ポケットは２個以上あってもよい。0 <(d 2 −d 1 ) / d 2 <0.5 Of course, there may be two or more sub pockets.
【００２１】本発明による副給液ポケットを持つ、即ち
複数のスロット部を持つ、塗布装置において、それぞれ
のスロット間隙を同一でないものとすることにより、ス
ロット部の幅方向の間隙精度が流量分布に与える影響を
従来より小さくできることに成功したのである。本発明
により塗布装置を不当に大型化、複雑化することなく、
より均一な幅方向流量分布を提供する塗布装置の設計が
可能となった。In the coating apparatus having the sub-liquid supply pocket according to the present invention, that is, having a plurality of slot portions, by making the slot gaps different from each other, the gap accuracy in the width direction of the slot portions is determined by the flow rate distribution. We have succeeded in reducing the impact on the product. According to the present invention, without unduly increasing the size and complexity of the coating apparatus,
It has become possible to design a coating device that provides a more uniform widthwise flow distribution.
【００２２】[0022]
【実施例】以下、本発明の効果について実施例により具
体的に例証する。EXAMPLES Hereinafter, the effects of the present invention will be specifically illustrated by examples.
【００２３】塗布装置 図１に示す塗布巾1,000mmの塗布装置を用い、スロット
間隙を下記のように変えた。Coating Device Using the coating device with a coating width of 1,000 mm shown in FIG. 1, the slot gap was changed as follows.
【００２４】比較 ：第１、第２のスロット間隙は同
じとし、共に500μm 本発明 ：第１のスロット間隙（ｄ2） 450μm 第２のスロット間隙（ｄ1） 600μm 塗布液 ５％ゼラチン溶液（界面活性剤を含む） 粘度：50cp
塗布量:2,000ml/min 結果 塗布装置より流出する幅方向の流量分布を測定した。Comparison: The first and second slot gaps are the same, and both are 500 μm. The present invention: First slot gap (d 2 ) 450 μm Second slot gap (d 1 ) 600 μm Coating solution 5% gelatin solution (interface Viscosity: 50cp
Application amount: 2,000 ml / min Results The flow rate distribution in the width direction flowing out from the application device was measured.
【００２５】その結果、比較例は５％であったが、本発
明の場合は３％の分布であった。As a result, the comparative example had a distribution of 5%, but the present invention had a distribution of 3%.
【００２６】また、塗布装置組み立ての際に、ポケット
下合わせ面の一部に幅10mm、厚さ50μmのスペーサーを挿
入し、故意にスロット間隙の一部を広くした塗布装置で
同様の測定を行った。When assembling the coating apparatus, a spacer having a width of 10 mm and a thickness of 50 μm is inserted into a part of the pocket lower mating surface, and the same measurement is performed by the coating apparatus in which a part of the slot gap is intentionally widened. It was
【００２７】その場合幅方向流量分布は比較例が12％で
あったのに対し、本発明の塗布装置は６％であった。In this case, the flow rate distribution in the width direction was 12% in the comparative example, whereas it was 6% in the coating apparatus of the present invention.
【００２８】[0028]
【発明の効果】本発明により、スロットより塗布液を流
出させるタイプ、例えばスライドホッパーあるいはエク
ストルージョン塗布装置において、幅手方向流量（膜
厚）の均一性を高めた塗布装置を提供することができ
た。According to the present invention, it is possible to provide a coating apparatus in which the uniformity of the flow rate (film thickness) in the width direction is improved in a type such as a slide hopper or an extrusion coating apparatus in which the coating solution flows out from a slot. It was
【図１】本発明に係るスライドホッパー塗布装置の斜視
図FIG. 1 is a perspective view of a slide hopper coating device according to the present invention.
【図２】従来のスライドホッパー塗布装置の断面図FIG. 2 is a sectional view of a conventional slide hopper coating device.
【図３】従来のスライドホッパー塗布装置の断面図FIG. 3 is a sectional view of a conventional slide hopper coating device.
１ 送液パイプ ２、３、14 ポケット ４、６、15 スロット ５、16 スライド面 1 Liquid transfer pipe 2, 3, 14 Pocket 4, 6, 15 Slot 5, 16 Sliding surface
Claims (1)
ット部を有し、該スロット中に少なくとも１つの副給液
ポケットを持ち、支持体表面に一定量の塗布液を均一に
塗布する塗布装置において、１つ以上の副給液ポケット
によって分割された２つ以上のスロット部の間隙をスロ
ット出口に近い程広くすることを特徴とする塗布装置。1. A coating apparatus having an internal liquid supply pocket and a slot portion related to the internal liquid supply pocket, having at least one sub liquid supply pocket in the slot, and uniformly applying a constant amount of the coating liquid on the surface of a support. A coating apparatus, wherein a gap between two or more slot portions divided by one or more sub liquid supply pockets is widened toward a slot outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15788992A JPH06433A (en) | 1992-06-17 | 1992-06-17 | Coating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15788992A JPH06433A (en) | 1992-06-17 | 1992-06-17 | Coating apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06433A true JPH06433A (en) | 1994-01-11 |
Family
ID=15659635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15788992A Pending JPH06433A (en) | 1992-06-17 | 1992-06-17 | Coating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06433A (en) |
-
1992
- 1992-06-17 JP JP15788992A patent/JPH06433A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US3526528A (en) | Multiple doctor coating process and apparatus | |
| JP3220265B2 (en) | Coating equipment | |
| US4977852A (en) | Method of simultaneous multilayer application | |
| US6607786B2 (en) | Method of curtain coating | |
| JPS60238179A (en) | Coating apparatus | |
| US4748057A (en) | Coating method | |
| JPH0677711B2 (en) | Coating device | |
| JPH07155670A (en) | Coating hopper with crossed type fluid circuit | |
| US3573965A (en) | Multilayer coating method | |
| US4038442A (en) | Method for coating | |
| JPH02174965A (en) | Method and device for coating to double layers | |
| JPH06433A (en) | Coating apparatus | |
| US5209954A (en) | Method for applying a coating liquid to a web | |
| JP3585136B2 (en) | Coating device and coating method | |
| JP2004160274A (en) | Method for forming coating film, apparatus for forming coating film, and method for producing sheet-like material with laminated film | |
| JP2002370057A (en) | Extrusion type nozzle and coating device | |
| JPH07108207A (en) | Coating apparatus | |
| JPH06142591A (en) | Coating liquid nozzle | |
| JP2767714B2 (en) | Coating liquid injector | |
| EP0451862B1 (en) | Method for Applying Magnetic Liquid to a Web by Use of an Extrusion Head with Excess Liquid | |
| JP2937555B2 (en) | Coating device | |
| JPH10235260A (en) | Coating applicator and photographic sensitive material | |
| JP3765144B2 (en) | Slide coating apparatus and method for producing photosensitive material using the same | |
| JPH02245267A (en) | Applying method | |
| JP2639670B2 (en) | Coating device and coating method |