JPH0461948A - Coating device - Google Patents
Coating deviceInfo
- Publication number
- JPH0461948A JPH0461948A JP16589890A JP16589890A JPH0461948A JP H0461948 A JPH0461948 A JP H0461948A JP 16589890 A JP16589890 A JP 16589890A JP 16589890 A JP16589890 A JP 16589890A JP H0461948 A JPH0461948 A JP H0461948A
- Authority
- JP
- Japan
- Prior art keywords
- coating
- web
- liq
- coating liquid
- coating material
- 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 90
- 238000000576 coating method Methods 0.000 title claims abstract description 90
- 239000002904 solvent Substances 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 62
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 8
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 230000005484 gravity Effects 0.000 abstract description 3
- 230000035515 penetration Effects 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000006866 deterioration Effects 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 238000004062 sedimentation Methods 0.000 description 2
- 239000000571 coke Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Landscapes
- Coating Apparatus (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は製紙機械の塗工機（紙コーク）、製紙機械のプ
ロセス機械（鋼板用コータ）等に利用できる塗工装置に
関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a coating device that can be used in a paper making machine's coating machine (paper coke), a paper making machine's process machine (steel plate coater), and the like.
（従来の技術）
第３図に従来のコータの１例を示す。図において給液管
１０から供給された塗工液２は、ファウンテンロール３
とメタリングロール４の間に溜り、間両ロールの回転周
速、ニップ圧（又はギャップ量）、ロール回転速度差に
応じてロール間を通過する。ロール間を通過した塗工液
２のうち、メタリングロール４上に付着しているものは
、メタリングロール４とアプリケータロール５間のニッ
プ部へ進入する。ニップ通過後、塗工液２はメタリング
ロール４側とアプリケ−クロール５側へ分裂する。アプ
リケータロール５上の塗工液２は、その後バンキングロ
ール６とアプリケ−クロール５間に挾まれたウェブ１の
表面と接触し、その一部はロール間ニップ通過後、ウェ
ブ１の表面上に転移して塗工液膜を形成する。(Prior Art) FIG. 3 shows an example of a conventional coater. In the figure, the coating liquid 2 supplied from the liquid supply pipe 10 is supplied to the fountain roll 3.
and the metering roll 4, and passes between the rolls depending on the rotational circumferential speed, nip pressure (or gap amount), and roll rotational speed difference between the two rolls. Of the coating liquid 2 that has passed between the rolls, the coating liquid 2 that has adhered to the metering roll 4 enters the nip between the metering roll 4 and the applicator roll 5. After passing through the nip, the coating liquid 2 is split into the metering roll 4 side and the applicator roll 5 side. The coating liquid 2 on the applicator roll 5 then comes into contact with the surface of the web 1 sandwiched between the banking roll 6 and the applicator roll 5, and a part of it passes through the nip between the rolls and is deposited on the surface of the web 1. Transfers and forms a coating liquid film.
（発明が解決しようとする課題）
ところが第３図に示した様な従来のロールコータの場合
には、第５図に示す様に、ロール間ニップ出口の塗工液
膜分裂位置付近に不安定流動による液膜厚凹凸（リング
パターンと称す）が発生する場合がある。このリングパ
ターンはウェブ１上の塗工液２膜に影響を与えｒ第４図
）、塗工品質を悪化させる要因となる場合があった。(Problem to be solved by the invention) However, in the case of the conventional roll coater as shown in Fig. 3, as shown in Fig. 5, the coating liquid film is unstable near the splitting position at the exit of the nip between the rolls. Unevenness in the liquid film thickness (referred to as a ring pattern) may occur due to the flow. This ring pattern affected the two coating liquid films on the web 1 (Fig. 4), and could be a factor in deteriorating the coating quality.
本発明は、前記の様なリングパターン等の塗工液膜厚さ
ムラの発生を抑制、若しくはリングパターンの発生した
塗工液膜厚を平滑化するため、少なくともウェブにアプ
リケータロールから塗工液を塗布する前に、ウェブ上の
塗工液膜の流動性を良くする様に、低濃度の塗工液、若
しくは塗工液の溶媒のみを塗布する装置を配設してなる
塗工装置を提供し、これにより従来の課題を解決しよう
とするものである。In order to suppress the occurrence of coating liquid film thickness unevenness such as the above-mentioned ring pattern, or to smoothen the coating liquid film thickness where a ring pattern has occurred, the present invention provides a method for applying coating to at least a web from an applicator roll. A coating device equipped with a device that applies only a low-concentration coating solution or a coating solution solvent to improve the fluidity of the coating solution film on the web before coating the solution. The aim is to provide a solution to existing problems.
（課題を解決するための手段）
このため本発明は、互に接触して反対方向に回転し、同
接触部に塗工液を貯溜する１対のロールと、同ロールの
一方と接触し、ウェブを挾んで回転する１対のロールか
ら成る塗工装置において、少なくとも前記ロール群のウ
ェブ走行方向の前流側に、低濃度塗工液又は塗工液溶剤
をウェブに塗布する装置を設けてなるもので、これを課
題解決のための手段とするものである。(Means for Solving the Problems) Therefore, the present invention provides a pair of rolls that contact each other and rotate in opposite directions, and that store a coating liquid in the same contact portion, and a pair of rolls that contact one of the rolls, In a coating device consisting of a pair of rolls that rotate while sandwiching a web, a device for applying a low concentration coating liquid or a coating liquid solvent to the web is provided at least on the upstream side of the roll group in the web running direction. This is a means to solve problems.
（作用）
アプリケ−クロールにて少なくともウェブ上に塗工液を
塗布する前に、低濃度塗工液若しくは塗工液の溶媒のみ
をウェブ上に塗布するため、ウェブ上の塗工液膜の流動
性が増し、リングパターン等の塗工液膜厚凹凸が重力、
表面張力等の作用により平滑化される。(Function) At least before applying the coating liquid onto the web using an applicator roll, a low concentration coating liquid or only the solvent of the coating liquid is applied onto the web, so that the coating liquid film on the web flows. The coating liquid film thickness unevenness such as a ring pattern is affected by gravity,
It is smoothed by the action of surface tension, etc.
またアプリケータロールからウェブへ塗工液を塗布する
前工程に本発明を施行した場合、ウェブが紙等の浸透性
のあるものの時には、ウェブ中の細孔が低濃度塗工液若
しくは塗工液溶媒で埋められるため、リングパターン等
の塗工液膜厚さムラに沿った塗工液の浸透ムラを防止で
きる。一方塗工液中に沈降速度が比較的速い固形分粒子
、顔料等が含まれている場合には、ウェブ上に塗工液膜
が形成された後工程で本発明を施行すれば、低濃度塗工
液若しくは塗工液溶媒の塗布に伴う撹拌効果によりリン
グパターン等の塗工液膜厚凹凸に沿って固形分が沈降し
、塗工ムラとなる事を防止できる。Furthermore, when the present invention is implemented in the pre-process of applying the coating liquid from the applicator roll to the web, when the web is permeable such as paper, the pores in the web are Since it is filled with the solvent, it is possible to prevent uneven penetration of the coating liquid along the unevenness of coating liquid film thickness such as a ring pattern. On the other hand, if the coating liquid contains solid particles, pigments, etc. that have a relatively high sedimentation rate, it is possible to reduce the concentration by implementing the present invention in the post-process after the coating liquid film is formed on the web. Due to the stirring effect accompanying the application of the coating liquid or coating liquid solvent, it is possible to prevent solid content from settling along the unevenness of the coating liquid film thickness such as a ring pattern, resulting in uneven coating.
（実施例）
以下本発明を図面の実施例について説明すると、第１図
及び第２図は本発明の第１．第２実施例を示す。先ず第
１図の実施例について説明すると、これはアプリケ−ク
ロール５からウェブ１へ塗工液２を塗布する前工程に本
発明を施行した場合であり、低濃度液用給液管９より供
給された低濃度塗工液、若しくは塗工液溶媒１１は、パ
ン８に溜まり、低濃度液塗工用ロール７の回転によって
ウェブ１上へ塗布される。ウェブｌが低濃度液塗工用ロ
ール７からアプリケータロール５に搬送されるまでの間
、先に塗布された低濃度塗工液１１はウェブが浸透性の
場合にはウェブ１中の細孔へ浸透して行き、ウェブ１が
非浸透性の場合にはウェブ１上に滞留している。(Example) The present invention will be described below with reference to the embodiments of the drawings. FIGS. 1 and 2 are the first embodiment of the present invention. A second example is shown. First, the embodiment shown in FIG. 1 will be described. This is a case in which the present invention is applied in the pre-process of applying the coating liquid 2 from the applicator roll 5 to the web 1. The low concentration coating liquid or coating liquid solvent 11 collected in the pan 8 is applied onto the web 1 by rotation of the low concentration liquid coating roll 7. Until the web 1 is conveyed from the low concentration liquid coating roll 7 to the applicator roll 5, the previously applied low concentration coating liquid 11 is applied to the pores in the web 1 if the web is permeable. If the web 1 is non-permeable, it stays on the web 1.
以上の様な状態で搬送されてきたウェブ１の表面に、更
にアプリケータロール５から塗工液２が塗布される。こ
こでアプリケータロール５にて塗工液２を塗布中にリン
グパターン等の塗工ムラが発生しても、ウェブ１上には
低濃度塗工液１１が予め塗布されているため、ウェブ１
が浸透性の場合にはリングパターン等の塗工ムラに沿っ
た塗工液の浸透ムラが発生しない。またウェブ１が鋼板
等の非浸透性物である場合、予め塗布された低濃度塗工
液１１は一般に低粘度、高表面張力であるため、ウェブ
１が次工程へ搬送される間に重力、表面張力等の作用に
より、リングパターン等の塗工液膜厚さムラは平滑化（
レベリング）される。The coating liquid 2 is further applied from the applicator roll 5 onto the surface of the web 1 that has been conveyed in the above state. Here, even if coating unevenness such as a ring pattern occurs while coating the coating liquid 2 with the applicator roll 5, since the low concentration coating liquid 11 has been applied on the web 1 in advance, the web 1
If it is permeable, uneven penetration of the coating liquid along coating unevenness such as a ring pattern will not occur. Furthermore, when the web 1 is a non-permeable material such as a steel plate, the pre-applied low-concentration coating liquid 11 generally has a low viscosity and high surface tension. Due to the effects of surface tension, etc., uneven coating film thickness such as ring patterns is smoothed out (
leveling).
以上の工程後に、万一リングパターン等の塗工液膜ムラ
が残った場合、若しくは塗工液２内に沈降速度が液のレ
ベリング速度よりも速い固形分粒子等が含まれていて、
リングパターン等の塗工ムラに沿った粒子の模様（筋な
ど）が残った場合には、アプリケ−クロール５にて塗工
液２をウェブ１上に塗布後、再び低濃度塗工液１１をウ
ェブ１上の塗工液２の膜上に塗布する事によりウェブ１
上の塗工液２の膜が撹拌され、またウェブ１上の塗工液
２の膜の流動性が改善されて液膜厚のレベリングが行わ
れるため、リングパターン等の塗工膜厚ムラに起因する
塗工品質の低下を解消することが可能となる。なお、低
濃度塗工液の塗布装置としては、本実施例に示した様な
ロール方式の他に、スプレ一方式、カーテンコート方式
等も考えられる。After the above steps, if coating liquid film unevenness such as a ring pattern remains, or if the coating liquid 2 contains solid particles whose sedimentation speed is faster than the leveling speed of the liquid,
If particle patterns (streaks, etc.) along coating unevenness such as a ring pattern remain, apply coating liquid 2 on the web 1 with applicator roll 5, and then apply low concentration coating liquid 11 again. Web 1 is coated on the film of coating liquid 2 on web 1.
The film of coating liquid 2 on the web 1 is stirred, and the fluidity of the film of coating liquid 2 on the web 1 is improved to level the liquid film thickness, which prevents uneven coating film thickness such as ring patterns. It becomes possible to eliminate the resulting deterioration in coating quality. In addition to the roll method as shown in this embodiment, a one-way spray method, a curtain coat method, and the like are also conceivable as the application device for the low concentration coating liquid.
第２図は塗工液２をウェブ１に塗布する際のロール５，
６のウェブ走行方向の前流側と後流側に本発明を施行し
た場合で、６″は後流側のバッキングロール、７′は低
濃度液塗工用ロール、８′は低濃度液用パン、９′は低
濃度給液管である。Figure 2 shows the roll 5 and
6'' is a backing roll on the downstream side, 7' is a roll for applying a low concentration liquid, and 8' is a roll for applying a low concentration liquid. Pan, 9' is a low concentration liquid supply pipe.
（発明の効果）
以上詳細に説明した如く本発明は構成されているので、
リングパターン等に起因する塗工品質の低下が解消され
ると共に、実施も容易であり、かつアプリケ−クロール
に関する運転制御も容易になる（リングパターンの発生
に鈍感になるため）等の効果を奏するものである。(Effects of the Invention) Since the present invention is configured as explained in detail above,
Deterioration in coating quality caused by ring patterns, etc. is eliminated, and it is easy to implement, and operation control regarding applicator rolls becomes easy (because it becomes insensitive to the occurrence of ring patterns). It is something.
第１図及び第２図は本発明の第１．第２実施例に係る塗
工装置の側断面図、第３図は従来の塗工装置の１例を示
す側断面図、第４図はリングパターン発生状況を示す斜
視図、第５図（ａ）はリングパターン発生機構を示す側
断面図、第５図（ｂ）はウェブを除いた場合の同（ａ）
の平面図である。
図の主要部分の説明
１−ウェブ
２−塗工液
３−ファウンテンロール
４−メタリングロール
５−アプリケータロール
６．６’−−−バッキングロール
７−低濃度液塗工用ロール
８−低濃度液用パン
９−低濃度液給液管
１〇−塗工液給液管
１１−低濃度塗工液又は塗工液溶剤FIGS. 1 and 2 show the first embodiment of the present invention. FIG. 3 is a side sectional view showing an example of a conventional coating device, FIG. 4 is a perspective view showing a ring pattern generation situation, and FIG. ) is a side sectional view showing the ring pattern generation mechanism, and Fig. 5(b) is the same as Fig. 5(a) without the web.
FIG. Description of main parts of the figure 1 - Web 2 - Coating liquid 3 - Fountain roll 4 - Metering roll 5 - Applicator roll 6.6' --- Backing roll 7 - Low concentration liquid coating roll 8 - Low concentration Liquid pan 9 - Low concentration liquid supply pipe 1 - Coating liquid supply pipe 11 - Low concentration coating liquid or coating liquid solvent
Claims (1)
溜する１対のロールと、同ロールの一方と接触し、ウェ
ブを挾んで回転する１対のロールから成る塗工装置にお
いて、少なくとも前記ロール群のウェブ走行方向の前流
側に、低濃度塗工液又は塗工液溶剤をウェブに塗布する
装置を設けたことを特徴とする塗工装置。A coating device consisting of a pair of rolls that contact each other and rotate in opposite directions and store the coating liquid in the same contact portion, and a pair of rolls that contact one of the rolls and rotate while sandwiching the web. A coating apparatus characterized in that a device for applying a low concentration coating liquid or a coating liquid solvent to the web is provided at least on the upstream side of the roll group in the web running direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16589890A JPH0461948A (en) | 1990-06-25 | 1990-06-25 | Coating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16589890A JPH0461948A (en) | 1990-06-25 | 1990-06-25 | Coating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0461948A true JPH0461948A (en) | 1992-02-27 |
Family
ID=15821082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16589890A Pending JPH0461948A (en) | 1990-06-25 | 1990-06-25 | Coating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0461948A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06226175A (en) * | 1993-02-08 | 1994-08-16 | Yasui Seiki:Kk | Method and device for coating base with very fine recesses |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6093855A (en) * | 1983-10-26 | 1985-05-25 | Mitsubishi Electric Corp | Data transmission equipment |
-
1990
- 1990-06-25 JP JP16589890A patent/JPH0461948A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6093855A (en) * | 1983-10-26 | 1985-05-25 | Mitsubishi Electric Corp | Data transmission equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06226175A (en) * | 1993-02-08 | 1994-08-16 | Yasui Seiki:Kk | Method and device for coating base with very fine recesses |
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