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JP2002086040A - Device forming uncoated part on both ends of sheet - Google Patents

Device forming uncoated part on both ends of sheet

Info

Publication number
JP2002086040A
JP2002086040A JP2000284447A JP2000284447A JP2002086040A JP 2002086040 A JP2002086040 A JP 2002086040A JP 2000284447 A JP2000284447 A JP 2000284447A JP 2000284447 A JP2000284447 A JP 2000284447A JP 2002086040 A JP2002086040 A JP 2002086040A
Authority
JP
Japan
Prior art keywords
sheet
coating liquid
curtain
coater
bent
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
Application number
JP2000284447A
Other languages
Japanese (ja)
Inventor
Toru Okubo
亨 大久保
Mitsuo Kushida
光雄 櫛田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Paper Industries Co Ltd
Jujo Paper Co Ltd
Original Assignee
Nippon Paper Industries Co Ltd
Jujo Paper Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Paper Industries Co Ltd, Jujo Paper Co Ltd filed Critical Nippon Paper Industries Co Ltd
Priority to JP2000284447A priority Critical patent/JP2002086040A/en
Publication of JP2002086040A publication Critical patent/JP2002086040A/en
Pending legal-status Critical Current

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  • Coating Apparatus (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a device solving a problem that a coating liquid is dropped from both ends of a sheet and a surface of a roll or a conveyor traveling the sheet is contaminated, when the sheet is coated on by a curtain flow coater. SOLUTION: A guide having a cross section of curved surface is provided at a just front position of a curtain dropping off part of the curtain flow coater and both ends of the traveling sheet before coated are bent to a lower part. A tub covering a bent sheet part is provided on the curtain dropping off part and the coating liquid dropped off on the bent part is recovered by the tub. Since the coating liquid is shielded at the bent part, an uncoated part is formed at both ends of the sheet. The coating liquid can be saved and it can be prevented that the coating liquid is dropped from both ends of the sheet by providing the uncoated part on both ends of the sheet.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、紙、フィルム等の
シートの塗工方法及びその装置に関する発明である。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for coating sheets such as paper and film.

【0002】[0002]

【従来の技術】紙、フィルム等のシートの表面に塗工す
るには、ロールコーターによる方法、ブレードコーター
による方法、カーテンフローコーターによる方法等が用
いられている。カーテンフローコーターによる塗工方法
は、図2に示すように、塗液をコーターヘッド3に供給
し、コーターヘッド3の下部に設けられたスリットから
塗液の薄い膜からなるカーテン4を落下させ、コーター
ヘッド3の下を走行するシートSの表面に塗液のカーテ
ンを移転させる方式である。塗液のカーテン4の落下点
には、塗液を受ける図示しない回収パンがあり、この回
収パンはシート幅よりも広く設定されている。シートS
がコーターヘッド3の下を走行している間は、シート両
端の外側に落下するカーテンの塗液だけが回収パンに回
収されるが、シートSが途切れたときは、カーテン4の
塗液の全量が回収され、コーターヘッド3にリサイクル
される。
2. Description of the Related Art A roll coater, a blade coater, a curtain flow coater, and the like are used for coating the surface of a sheet such as paper or film. As shown in FIG. 2, the coating method using a curtain flow coater supplies a coating liquid to a coater head 3 and drops a curtain 4 made of a thin film of the coating liquid from a slit provided at a lower portion of the coater head 3. This is a method in which the curtain of the coating liquid is transferred to the surface of the sheet S traveling under the coater head 3. At the drop point of the coating liquid curtain 4, there is a collecting pan (not shown) that receives the coating liquid, and the collecting pan is set wider than the sheet width. Sheet S
While the vehicle is traveling under the coater head 3, only the coating liquid of the curtain which falls to the outside of both ends of the sheet is collected by the collecting pan, but when the sheet S is interrupted, the total amount of the coating liquid of the curtain 4 is Is collected and recycled to the coater head 3.

【0003】[0003]

【発明が解決しようとする課題】上述のように、カーテ
ンフローコーターのコーターヘッド3から落下する塗液
のカーテン4の幅は、シートSが多少蛇行しても、両端
部に未塗工部分が残らないよう、シート幅よりも広く設
定されている。塗液を塗工されたシートSは裏面をベル
トコンベヤ又は駆動ロールによりドライヤーに搬入さ
れ、そこで乾燥する。
As described above, the width of the coating liquid curtain 4 falling from the coater head 3 of the curtain flow coater is such that even if the sheet S is slightly meandering, uncoated portions are formed at both ends. It is set wider than the sheet width so that it does not remain. The sheet S coated with the coating liquid is conveyed on its back side to a dryer by a belt conveyor or a driving roll, where it is dried.

【0004】シートSの両端のエッジ部分に塗工された
塗液は、塗液の表面張力により、エッジの方に寄りやす
い。そのため、エッジ部分が結果的に厚塗りされ、厚塗
りされた塗液がシートSの裏面に回りやすい。裏面に回
った塗液は、シート搬送用のコンベヤ又はロールに付着
し、シートSの裏面を汚す。エッジにごく近い部分は、
塗工量が不均一になるので、通常後工程において、スリ
ッターによりカットされ、塗工製品から除去される。塗
工するシートSが紙の場合、パルプ製造設備があれば、
カットされたエッジ部分は損紙として原料パルプに再生
される。しかしながら、製品とならない部分に塗液を塗
ることは、その分だけ塗液の無駄であるばかりでなく、
塗工された損紙は塗液を含むため、通常の損紙よりもパ
ルプに戻す処理コスト余分にかかる。
The coating liquid applied to the edges at both ends of the sheet S tends to move toward the edges due to the surface tension of the coating liquid. As a result, the edge portion is thickly coated as a result, and the thickly coated coating liquid easily turns to the back surface of the sheet S. The coating liquid that has reached the back surface adheres to the conveyor or roll for conveying the sheet, and stains the back surface of the sheet S. The part very close to the edge
Since the coating amount becomes non-uniform, it is usually cut by a slitter in a post-process and removed from the coated product. When the sheet S to be coated is paper, if there is a pulp manufacturing facility,
The cut edge portion is recycled into raw pulp as waste paper. However, applying a coating liquid to a part that does not become a product is not only a waste of the coating liquid, but also
Since the coated broke contains a coating liquid, the processing cost for returning to pulp is higher than that of ordinary broke.

【0005】塗工するシートSがフィルムの場合は、紙
に比べてリサイクルしにくいので、そのまま廃棄処分と
なるが、塗工された塗液の分だけ処分量が増加する。近
年、産業廃棄物の処理量を少しでも減らそうとする努力
が鋭意行われており、上記エッジ部部分に塗工される塗
液を減らすことは、大いに意義あることである。また、
コンベヤ又はロールに付着、堆積した塗液は、乾燥して
塗液粕となり、剥がれて飛散し、シートSの塗工面に落
下して不良シート発生の原因となることもある。
[0005] When the sheet S to be coated is a film, it is difficult to recycle compared to paper, so that it is disposed of as it is. However, the disposal amount increases by the amount of the applied coating liquid. In recent years, efforts have been made diligently to reduce the throughput of industrial waste, and reducing the amount of coating liquid applied to the edge portion is of great significance. Also,
The coating liquid adhered and deposited on the conveyor or roll may be dried to form coating liquid residue, peeled off and scattered, fall on the coating surface of the sheet S, and cause a defective sheet.

【0006】[0006]

【課題を解決するための手段】本発明は、以下の手段に
より、上記問題点を解決した。即ち、シートの走行方向
から見てコーターヘッドの上流且つコーターヘッドの近
傍に、シートの両端部を下側に向けて鈍角に折り曲げる
ガイドを取り付け、塗液のカーテン落下点には前記折り
曲げられたシート部分を被覆する樋が取り付けることに
より、シートの両端部に未塗工部分を形成するものであ
る。
The present invention has solved the above-mentioned problems by the following means. That is, a guide for bending both ends of the sheet toward the lower side at an obtuse angle is attached upstream of the coater head and near the coater head as viewed from the running direction of the sheet. An uncoated portion is formed at both ends of the sheet by attaching gutters covering the portion.

【0007】[0007]

【発明の実施の形態】本発明を実施例である図1に基づ
いて説明する。図中、3はコーターヘッドで、コーター
ヘッド3に送られた塗液は、コーターヘッド3の下部に
設けられたスリットから、塗液の薄膜のカーテン4とな
って、図示しない塗液回収パンに落下する。シートS
は、図示しないコンベヤ又は回転するロールに支持され
て矢印方向に走行する。シートSがコーターヘッド3の
直下を通過するとき、塗液のカーテン4がシートSの表
面に移転し、シートS上に塗膜を形成する。シートSの
走行方向の上流のコーターヘッド3の近傍には、ガイド
1が設けられている。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to FIG. In the figure, reference numeral 3 denotes a coater head, and the coating liquid sent to the coater head 3 forms a curtain 4 of a coating liquid thin film from a slit provided at a lower portion of the coater head 3 and is applied to a coating liquid collecting pan (not shown). Fall. Sheet S
Runs in the direction of the arrow supported by a conveyor or a rotating roll (not shown). When the sheet S passes directly below the coater head 3, the coating liquid curtain 4 moves to the surface of the sheet S, and forms a coating film on the sheet S. A guide 1 is provided near the coater head 3 upstream in the traveling direction of the sheet S.

【0008】このガイド1は、シートSのエッジから1
0〜20mmを下側に向けて鈍角に折り曲げるよう、シ
ートSの表面に対して鋭角で交差するように取り付けら
れている。コーターヘッド3の直下において、塗液のカ
ーテン4が落下してくるが、折り曲げられた両端部は樋
2が被覆しているので、折り曲げられた両端部分に落下
する塗液は、樋2により回収される。
[0008] The guide 1 is moved from the edge of the sheet S by 1
The sheet S is attached so as to intersect at an acute angle with the surface of the sheet S so that 0 to 20 mm is bent downward at an obtuse angle. Immediately below the coater head 3, the coating liquid curtain 4 falls, but the bent end portions are covered with the gutters 2, so that the coating liquid falling on the bent end portions is collected by the gutters 2. Is done.

【0009】図1において、ガイド1は、シートSを破
断しないよう自由回転可能で且つシートの幅方向に移動
可能なローターとしてある。上記ローターをシートの幅
方向に移動可能な構造とするのは、種々の幅寸法のシー
トに適用できるようにするものであり、一種類の幅のシ
ートしか通さない場合は、この要件は必要ない。ガイド
1を自由回転可能なローターとすることにより、薄いシ
ートの場合でも、破断を防止できる。厚いシート、例え
ば厚紙の場合には、一般に破断に対する強度が大きいの
で、自由回転しない円形パイプのようなものでもよい。
但し、シートSを破断しないよう、シートのエッジと曲
面で接していることが望ましい。 比較的薄いシート、
例えば100g/m以下の紙の場合は、容易に折り曲
げることができるので、樋2にガイド1の役割を兼ねさ
せることも可能であるが、100g/m以上の厚紙の
場合、無理に折り曲げると樋2が紙と共に振動し、塗工
むらの原因となる。
In FIG. 1, a guide 1 is a rotor which can freely rotate so as not to break the sheet S and can move in the width direction of the sheet. The structure in which the rotor can be moved in the width direction of the sheet is intended to be applicable to sheets having various widths. This requirement is not necessary when only one type of sheet is passed. . By making the guide 1 a freely rotatable rotor, breakage can be prevented even in the case of a thin sheet. In the case of a thick sheet, for example, cardboard, the strength against breakage is generally large, so that a circular pipe that does not rotate freely may be used.
However, it is desirable that the sheet S be in contact with the edge of the sheet on a curved surface so as not to be broken. Relatively thin sheets,
For example, in the case of paper of 100 g / m 2 or less, the gutter 2 can also serve as the guide 1 because it can be easily bent. However, in the case of thick paper of 100 g / m 2 or more, it is forcibly folded. The gutter 2 vibrates together with the paper, causing uneven coating.

【0010】従って、樋2とは別個にガイド1を別個に
設け、シートSの両端部の折り曲げはガイド1によるこ
とが望ましい。樋2は、その裏面において、シートSの
折り曲げ部分と軽く接触させることが望ましい。塗液の
一部が樋2の裏面に回った場合、樋2の裏面が塗液によ
り汚染される。それを放置しておくと、塗液が乾燥し、
塗液粕が蓄積してくる。この塗液粕が蓄積して厚みを増
してくると、直下を通過するシートの折り曲げ部分と接
触する。その結果、塗液粕が剥がれて飛散し、シートの
表面に落下し、不良品発生の原因となることがある。
又、裏面に回った塗液が大きな液滴に成長し、それが突
然紙のエッジと接触し、飛散することもある。樋2の裏
面を常時又は断続的にシートの折れ込み部分と軽く接触
させておけば、樋2の裏面は常時クリーニングされ、塗
液粕が蓄積したり、液滴の成長を防止することができ
る。
Therefore, it is desirable that the guide 1 is provided separately from the gutter 2 and both ends of the sheet S are bent by the guide 1. It is desirable that the gutter 2 be lightly in contact with the bent portion of the sheet S on the back surface. When a part of the coating liquid reaches the back surface of the gutter 2, the back surface of the gutter 2 is contaminated with the coating liquid. If you leave it alone, the coating liquid will dry,
Coating lees accumulate. When the coating liquid cake accumulates and increases in thickness, it comes into contact with the bent portion of the sheet passing immediately below. As a result, the coating liquid cake is peeled off and scattered, and falls on the surface of the sheet, which may cause defective products.
In addition, the coating liquid that has turned to the back surface grows into large droplets, which suddenly come into contact with the edge of the paper and may be scattered. If the back surface of the gutter 2 is constantly or intermittently brought into light contact with the folded portion of the sheet, the back surface of the gutter 2 is constantly cleaned, and it is possible to prevent accumulation of coating liquid residue and growth of droplets. .

【0011】[0011]

【発明の効果】本発明の装置によって、シートの両端に
未塗工部分を設けることにより、塗液が節減できるとと
もに、塗工後スリッターで除去する両端部分のリサイク
ル、廃棄コストを低減することができる。請求項2の発
明は、ガイド1を自由回転可能なローターとすることに
より、薄いシートの場合でも、破断を防止できるように
したものである。請求項3の発明は、樋2の裏面を、シ
ートSの折り曲げ部分と軽く接触させることにより、樋
2の裏面を常時クリーニングし、塗液粕の蓄積や塗液の
液滴の成長を防止し、これら塗液粕又は液滴の飛散によ
る不良品の発生を防止しようとする発明である。
According to the apparatus of the present invention, by providing uncoated portions at both ends of the sheet, it is possible to save the coating liquid and to reduce the recycling and disposal costs of both ends removed by the slitter after coating. it can. According to the second aspect of the present invention, the guide 1 is a rotatable rotor so that breakage can be prevented even in the case of a thin sheet. According to the third aspect of the present invention, the back surface of the gutter 2 is lightly brought into contact with the bent portion of the sheet S, so that the back surface of the gutter 2 is constantly cleaned to prevent accumulation of coating liquid residue and growth of coating liquid droplets. The invention is intended to prevent the occurrence of defective products due to the scattering of these coating residue or droplets.

【図面の簡単な説明】[Brief description of the drawings]

【図1】 本発明の装置の説明図FIG. 1 is an explanatory view of an apparatus of the present invention.

【図2】 カーテンフローコーターの説明図FIG. 2 is an explanatory view of a curtain flow coater.

【符号の説明】[Explanation of symbols]

1 ガイド 2 樋 3 コーターヘッド 4 塗液のカーテン 5 折り込み線 S シート DESCRIPTION OF SYMBOLS 1 Guide 2 Gutter 3 Coater head 4 Coating liquid curtain 5 Folding line S sheet

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】シート表面にカーテンフローコーターで塗
工する際に、シートの幅方向両端部に未塗工部分を形成
する装置であって、 シートの走行方向から見てコーターヘッドの上流且つコ
ーターヘッドの近傍に、シートの両端部を下側に向けて
鈍角に折り曲げるガイドが取り付けられ、塗液のカーテ
ンの落下点には前記折り曲げられたシート部分を被覆す
る樋が取り付けられている、ことを特徴とするシートの
幅方向両端部に未塗工部分を形成する装置。
An apparatus for forming uncoated portions on both ends in the width direction of a sheet when coating the sheet surface with a curtain flow coater, wherein the apparatus is located upstream of a coater head and in a coater when viewed from a running direction of the sheet. In the vicinity of the head, a guide for bending both ends of the sheet toward the lower side at an obtuse angle is attached, and a gutter for covering the folded sheet portion is attached to a falling point of the coating liquid curtain. A device that forms uncoated portions at both ends in the width direction of a sheet.
【請求項2】ガイドが自由回転するローターであること
を特徴とする請求項1に記載のシートの幅方向両端部に
未塗工部分を形成する装置。
2. The apparatus according to claim 1, wherein the guide is a freely rotating rotor.
【請求項3】樋の裏面が、折り曲げられたシート部分と
軽く接触していることを特徴とする請求項1又は請求項
2に記載のシートの幅方向両端部に未塗工部分を形成す
る装置。
3. An uncoated portion is formed at both ends in the width direction of the sheet according to claim 1, wherein the back surface of the gutter is in light contact with the folded sheet portion. apparatus.
JP2000284447A 2000-09-20 2000-09-20 Device forming uncoated part on both ends of sheet Pending JP2002086040A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000284447A JP2002086040A (en) 2000-09-20 2000-09-20 Device forming uncoated part on both ends of sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000284447A JP2002086040A (en) 2000-09-20 2000-09-20 Device forming uncoated part on both ends of sheet

Publications (1)

Publication Number Publication Date
JP2002086040A true JP2002086040A (en) 2002-03-26

Family

ID=18768654

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000284447A Pending JP2002086040A (en) 2000-09-20 2000-09-20 Device forming uncoated part on both ends of sheet

Country Status (1)

Country Link
JP (1) JP2002086040A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009066506A (en) * 2007-09-12 2009-04-02 Voith Patent Gmbh Edge treater of curtain coater
US8360653B2 (en) 2007-05-11 2013-01-29 Schaeffler Technologies AG & Co. KG Double row, angular contact ball bearing with two plastic comb cages with retaining tabs
US8627781B2 (en) 2009-03-30 2014-01-14 Toyota Jidosha Kabushiki Kaisha Coating die and coating apparatus comprising the same
EP3375534A1 (en) 2017-03-17 2018-09-19 Ricoh Company Ltd. Curtain coating device and curtain coating method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8360653B2 (en) 2007-05-11 2013-01-29 Schaeffler Technologies AG & Co. KG Double row, angular contact ball bearing with two plastic comb cages with retaining tabs
JP2009066506A (en) * 2007-09-12 2009-04-02 Voith Patent Gmbh Edge treater of curtain coater
US8627781B2 (en) 2009-03-30 2014-01-14 Toyota Jidosha Kabushiki Kaisha Coating die and coating apparatus comprising the same
EP3375534A1 (en) 2017-03-17 2018-09-19 Ricoh Company Ltd. Curtain coating device and curtain coating method
US10792699B2 (en) 2017-03-17 2020-10-06 Ricoh Company, Ltd. Curtain coating device and curtain coating method

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