JP2023093125A

JP2023093125A - Coating device and coating method

Info

Publication number: JP2023093125A
Application number: JP2021208560A
Authority: JP
Inventors: 佳幾嶋田; Yoshiki Shimada; 基畑中; Motoi Hatanaka; 一人福田; Kazuto Fukuda; 正明田邉; Masaaki Tanabe
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2021-12-22
Filing date: 2021-12-22
Publication date: 2023-07-04

Abstract

To adjust a thickness of a coating film in a coating device forming a coating film on both faces of a base material.SOLUTION: A coating device 20 coats coating liquid C to both faces of a base material 2, and includes: first and second blocks 21, 22 which face to each other in a thickness direction of the base material 2; and a liquid pool part 23 which is formed so that the coating liquid C is pooled in a gap between the first and second blocks 21, 22 and through which the base material 2 is passed. The liquid pool part 23 includes: a base material introducing port 24 which opens to an upstream side in the conveying direction of the base material 2 and into which the base material 2 is introduced; a base material discharge port 25 which opens to a downstream side in the conveying direction and through which the base material 2 is discharged; and side face parts 26 which are located respectively at both sides in a width direction. The first block 21 is provided with a first coating liquid supply port 31. The second block 22 is provided with a second coating liquid supply port 32. The pressure of the coating liquid C supplied to the liquid pool part 23 through the first coating liquid supply port 31 is higher than the pressure of the coating liquid C supplied to the liquid pool part 23 through the second coating liquid supply port 32.SELECTED DRAWING: Figure 4

Description

本開示は、塗工装置及び塗工方法に関する。 The present disclosure relates to a coating apparatus and a coating method.

例えばロールｔｏロール法によって搬送されるシート状の基材の両面に塗膜を形成するための塗工装置に関して、種々の技術が開示されている。 Various techniques have been disclosed with respect to coating apparatuses for forming coating films on both sides of a sheet-like substrate conveyed by, for example, a roll-to-roll method.

例えば、特許文献１に開示の塗布装置（塗工装置）では、先ず、連続搬送される長尺のシート状基材を塗液が溜められた浸漬槽に浸けることによって、基材の両面に対して塗液を塗布する。その後、基材を垂直方向に上昇させながら、一対の掻き落としロールによって、基材の両面における余分な塗液を掻き落とす。これにより、基材の両面に、一定の厚みの塗膜が形成される。 For example, in the coating apparatus (coating apparatus) disclosed in Patent Document 1, first, a continuously conveyed long sheet-like substrate is immersed in an immersion tank in which a coating liquid is stored, so that both surfaces of the substrate are coated. to apply the coating liquid. After that, while the substrate is being lifted in the vertical direction, excess coating liquid is scraped off from both sides of the substrate with a pair of scraping rolls. Thereby, a coating film having a constant thickness is formed on both surfaces of the substrate.

特開昭６４－７９６５号公報JP-A-64-7965

ところで、シート状の基材の両面各々に形成される塗膜の厚みを、調整したい場合がある。例えば、基材の両面各々に形成される塗膜の厚みを表裏で均一にしたい場合、片面側の塗膜の厚みのみを積極的に厚くしたい場合、又は基材の両面に形成される塗膜の厚みを搬送方向若しくは幅方向において調整したい場合などがある。特許文献１に係る塗工装置では、基材の両面各々に形成される塗膜の厚みを上手く調整することが難しい。 By the way, there are cases where it is desired to adjust the thickness of the coating film formed on each of both surfaces of the sheet-like substrate. For example, when you want to make the thickness of the coating film formed on both sides of the substrate uniform on the front and back, when you want to actively increase the thickness of the coating film on only one side, or when you want to increase the thickness of the coating film on both sides of the substrate There are cases where it is desired to adjust the thickness of the sheet in the conveying direction or the width direction. With the coating apparatus according to Patent Document 1, it is difficult to skillfully adjust the thickness of the coating film formed on each of both surfaces of the substrate.

本開示は斯かる点に鑑みてなされたものであり、その目的とするところは、搬送される基材の両面に塗膜を形成する塗工装置において、基材の両面に形成される塗膜の厚みを調整することにある。 The present disclosure has been made in view of such points, and the object thereof is to provide a coating apparatus for forming coating films on both sides of a conveyed base material, in which coating films are formed on both sides of the base material. to adjust the thickness of the

本開示に係る塗工装置は、搬送されるシート状の基材の両面に対して塗液を塗布する塗工装置であって、上記基材の厚み方向に互いに対向する一対のブロックと、上記一対のブロック同士の隙間に上記塗液が溜まるように形成されるとともに、上記基材が通る液溜り部と、を備え、上記液溜り部は、上記基材の搬送方向における上流側に開口し、上記基材が導入される基材導入口と、上記搬送方向における下流側に開口し、上記基材が排出される基材排出口と、上記搬送方向に交差する幅方向の両側にそれぞれ位置する側面部と、を含み、上記一対のブロックには、上記液溜り部に臨むとともに上記液溜り部に上記塗液を供給する第１塗液供給口及び第２塗液供給口が設けられており、上記第１塗液供給口から上記液溜り部に供給される上記塗液の圧力が、上記第２塗液供給口から上記液溜り部に供給される上記塗液の圧力よりも高くなるように構成されている。 A coating apparatus according to the present disclosure is a coating apparatus that applies a coating liquid to both surfaces of a conveyed sheet-like substrate, and includes a pair of blocks facing each other in the thickness direction of the substrate, and the a liquid reservoir formed in a gap between the pair of blocks so that the coating liquid is accumulated, and through which the substrate passes, the liquid reservoir opening upstream in the conveying direction of the substrate. , a base material inlet through which the base material is introduced, a base material outlet opening downstream in the conveying direction and through which the base material is discharged, and positions on both sides in the width direction intersecting the conveying direction. the pair of blocks are provided with a first coating liquid supply port and a second coating liquid supply port facing the liquid pool and supplying the coating liquid to the liquid pool. The pressure of the coating liquid supplied from the first coating liquid supply port to the liquid pool is higher than the pressure of the coating liquid supplied to the liquid pool from the second coating liquid supply port. is configured as

本開示に係る塗工方法は、上記塗工装置を用いて、上記第１塗液供給口及び上記第２塗液供給口から上記液溜り部に上記塗液を供給しながら、上記基材を上記液溜り部に通す。 In the coating method according to the present disclosure, the substrate is coated while supplying the coating liquid from the first coating liquid supply port and the second coating liquid supply port to the liquid reservoir portion using the coating device. Pass through the liquid reservoir.

本開示によれば、搬送される基材の両面に塗膜を形成する塗工装置において、基材の両面に形成される塗膜の厚みを調整することができる。 According to the present disclosure, it is possible to adjust the thickness of the coating films formed on both surfaces of the substrate in a coating apparatus that forms coating films on both surfaces of a conveyed substrate.

図１は、本開示の第１の実施形態に係る塗工装置を含む塗工システムを模式的に示す図である。FIG. 1 is a diagram schematically showing a coating system including a coating device according to a first embodiment of the present disclosure. 図２は、第１の実施形態に係る塗工装置の正面図である。FIG. 2 is a front view of the coating device according to the first embodiment. 図３は、第１の実施形態に係る塗工装置の平面図である。FIG. 3 is a plan view of the coating device according to the first embodiment. 図４は、第１の実施形態に係る塗工装置の側面図である。FIG. 4 is a side view of the coating device according to the first embodiment. 図５は、第１の実施形態に係る塗工装置の基材排出口近傍を拡大して示す拡大正面図である。FIG. 5 is an enlarged front view showing the vicinity of the base material outlet of the coating apparatus according to the first embodiment. 図６は、第２の実施形態に係る塗工装置の側面図である。FIG. 6 is a side view of the coating device according to the second embodiment. 図７は、第３の実施形態に係る塗工装置の側面図である。FIG. 7 is a side view of a coating device according to the third embodiment. 図８は、第４の実施形態に係る塗工装置の側面図である。FIG. 8 is a side view of a coating device according to a fourth embodiment. 図９は、第５の実施形態に係る塗工装置の正面図である。FIG. 9 is a front view of a coating device according to the fifth embodiment. 図１０は、第６の実施形態に係る塗工装置の側面図である。FIG. 10 is a side view of a coating device according to the sixth embodiment.

以下、本開示の実施形態を図面に基づいて詳細に説明する。以下の好ましい実施形態の説明は、本質的に例示に過ぎず、本開示、その適用物あるいはその用途を制限することを意図するものでは全くない。 Hereinafter, embodiments of the present disclosure will be described in detail based on the drawings. The following description of preferred embodiments is merely exemplary in nature and is in no way intended to limit the disclosure, its applicability or its uses.

＜第１の実施形態＞
（装置構成）
図１は、本開示の第１の実施形態に係る塗工システム１を模式的に示す。塗工システム１は、基材２の両面に塗膜Ｆを連続的に形成するためのものである。塗工システム１は、基材供給装置１０、塗工装置２０及び塗液供給装置４０から構成されてなる。 <First embodiment>
(Device configuration)
FIG. 1 schematically shows a coating system 1 according to a first embodiment of the present disclosure. The coating system 1 is for continuously forming coating films F on both surfaces of a substrate 2 . The coating system 1 is composed of a substrate supply device 10 , a coating device 20 and a coating liquid supply device 40 .

基材２は、長尺のシート状に形成されている。基材２としては、例えば、金属箔、樹脂フィルム、織布、不織布、紙等がある。基材２の塗膜Ｆを含まない厚み寸法ｔ（図５参照）は、例えば１ｍｍ以下である。 The base material 2 is formed in a long sheet shape. Examples of the substrate 2 include metal foil, resin film, woven fabric, non-woven fabric, and paper. The thickness dimension t (see FIG. 5) of the substrate 2 not including the coating film F is, for example, 1 mm or less.

基材供給装置１０は、ロールｔｏロール法によって、基材２を、その長手方向を搬送方向（Ｘで示す）として連続搬送する。具体的には、基材供給装置１０は、基材２を巻出機１１で巻き出して巻取機１２で巻き取ることによって、基材２を連続搬送する。搬送される基材２は、途中、第１ロール１３及び第２ロール１４を通る。 The base material supply device 10 continuously conveys the base material 2 by the roll-to-roll method, with the longitudinal direction being the conveyance direction (indicated by X). Specifically, the base material supply device 10 continuously conveys the base material 2 by unwinding the base material 2 with an unwinder 11 and winding it up with a winder 12 . The conveyed substrate 2 passes through the first roll 13 and the second roll 14 on the way.

基材２の搬送方向において、第１ロール１３と第２ロール１４との間には、塗工装置２０が配置されている。塗工装置２０は、詳細は後述するが、連続搬送されるシート状の基材２の両面に対して塗液Ｃを塗布して、基材２の両面に塗膜Ｆを形成する。塗工装置２０によって両面に塗膜Ｆが形成された基材２は、乾燥炉（図示せず）で乾燥されて塗膜Ｆ内に含まれる揮発成分が除去された後、巻取機１２に巻き取られる。 A coating device 20 is arranged between the first roll 13 and the second roll 14 in the conveying direction of the base material 2 . The coating device 20 , which will be described later in detail, applies the coating liquid C to both surfaces of the continuously conveyed sheet-like substrate 2 to form coating films F on both surfaces of the substrate 2 . The substrate 2 on which the coating film F is formed on both sides by the coating device 20 is dried in a drying oven (not shown) to remove volatile components contained in the coating film F, and then is sent to the winder 12. be wound up.

塗工装置２０の構成について、詳細に説明する。図２～５は本実施形態に係る塗工装置２０を示し、図２は正面図（ＩＩ矢視図）、図３は平面図（ＩＩＩ矢視図）、図４は側面図（ＩＶ矢視図）、図５は後述する基材排出口２５近傍の拡大正面図である。 A configuration of the coating device 20 will be described in detail. 2 to 5 show the coating device 20 according to the present embodiment, FIG. 2 is a front view (view from arrow II), FIG. 3 is a plan view (view from arrow III), and FIG. 4 is a side view (view from arrow IV). ), and FIG. 5 is an enlarged front view of the vicinity of the substrate outlet 25, which will be described later.

なお、本実施形態において、基材２の搬送方向（長手方向）及び幅方向（Ｙで示す）は、水平方向である。基材２の幅方向は、基材２の搬送方向に交差、具体的には直交している。基材２の厚み方向（Ｚで示す）は、鉛直方向である。 In addition, in this embodiment, the transport direction (longitudinal direction) and the width direction (indicated by Y) of the base material 2 are horizontal directions. The width direction of the substrate 2 intersects, specifically, orthogonally crosses the conveying direction of the substrate 2 . The thickness direction (indicated by Z) of the substrate 2 is the vertical direction.

塗工装置２０は、図２に示すように、一対のブロック、具体的には第１ブロック２１及び第２ブロック２２を備える。第１ブロック２１と第２ブロック２２とは、基材２の厚み方向に互いに所定の間隔を空けて配置されており、基材２の厚み方向に互いに対向している。各ブロック２１，２２は、略直方体状に形成されており、その長手方向が基材２の搬送方向に沿うように配置されている。 The coating device 20 includes a pair of blocks, specifically a first block 21 and a second block 22, as shown in FIG. The first block 21 and the second block 22 are arranged at a predetermined distance from each other in the thickness direction of the base material 2 and face each other in the thickness direction of the base material 2 . Each of the blocks 21 and 22 is formed in a substantially rectangular parallelepiped shape, and is arranged so that the longitudinal direction thereof is along the conveying direction of the base material 2 .

図３，４において、Ｌ１は、各ブロック２１，２２の長さ寸法である。Ｌ２は、各ブロック２１，２２の幅寸法である。Ｌ３は、各ブロック２１，２２の厚み寸法である。各ブロック２１，２２の長さ寸法Ｌ１は、基材２の厚み寸法ｔ（図５参照）に対して、十分大きい（例えば１００倍以上）ことが好ましい。本実施形態では、図４に示すように、各ブロック２１，２２の幅寸法Ｌ２は、基材２の幅寸法Ｂよりも小さい。 3 and 4, L1 is the length dimension of each block 21,22. L2 is the width dimension of each of the blocks 21 and 22; L3 is the thickness dimension of each of the blocks 21 and 22; It is preferable that the length dimension L1 of each block 21 and 22 is sufficiently large (for example, 100 times or more) with respect to the thickness dimension t (see FIG. 5) of the base material 2 . In this embodiment, as shown in FIG. 4, the width dimension L2 of each of the blocks 21 and 22 is smaller than the width dimension B of the base material 2. As shown in FIG.

図２に示すように、一対のブロック同士の隙間２３、すなわち第１ブロック２１と第２ブロック２２との隙間２３には、塗液Ｃが溜まるように、液溜り部が形成されている（以下、「液溜り部２３」という）。基材２が液溜り部２３を通ることによって、基材２の両面に対して塗液Ｃが塗布されて、基材２の両面に塗膜Ｆが形成される。 As shown in FIG. 2, in a gap 23 between a pair of blocks, that is, a gap 23 between the first block 21 and the second block 22, a liquid reservoir is formed so that the coating liquid C is accumulated (hereinafter referred to as , “liquid reservoir 23”). As the base material 2 passes through the liquid reservoir 23 , the coating liquid C is applied to both surfaces of the base material 2 to form coating films F on both surfaces of the base material 2 .

塗液Ｃは、ペースト状又はスラリー状であることが好ましい。塗液Ｃの粘度ηは、１ｍＰａ・ｓ以上であることが好ましく、１Ｐａ・ｓ～１０００Ｐａ・ｓであることがより好ましい。塗液Ｃは、例えば、シリカ、低融点ガラス、アルミナ・酸化チタン等の金属酸化物粒子を含んだ絶縁体材料や、はんだ、銅、銀、金属被覆した粒子等の金属粒子や、ニッケル酸リチウム、マンガン酸リチウム、コバルト酸リチウム、カーボン等を含んだ導電性材料や、染料、等を用いることができる。 The coating liquid C is preferably in the form of paste or slurry. The viscosity η of the coating liquid C is preferably 1 mPa·s or more, more preferably 1 Pa·s to 1000 Pa·s. The coating liquid C includes, for example, silica, low-melting glass, insulator materials containing metal oxide particles such as alumina and titanium oxide, metal particles such as solder, copper, silver, and metal-coated particles, and lithium nickel oxide. , lithium manganate, lithium cobaltate, a conductive material containing carbon or the like, a dye, or the like can be used.

Ｈは、第１ブロック２１と第２ブロック２２との隙間寸法を示す。隙間寸法Ｈは、基材２が通過可能なように、基材２の厚み寸法ｔ（例えば０．１ｍｍ以下）よりも大きい。隙間寸法Ｈは、極力小さい方がよく、０．１ｍｍ以上１ｍｍ以下であることが好ましい。 H indicates the dimension of the gap between the first block 21 and the second block 22 . The gap dimension H is larger than the thickness dimension t (for example, 0.1 mm or less) of the base material 2 so that the base material 2 can pass through. The gap dimension H should be as small as possible, preferably 0.1 mm or more and 1 mm or less.

液溜り部２３は、基材２の搬送方向における上流側（図２における左側）に開口する基材導入口２４と、基材２の搬送方向における下流側（図２における右側）に開口する基材排出口２５と、を含む。基材導入口２４と基材排出口２５とは、搬送方向において、互いに対向している。基材２は、基材導入口２４から導入されて、液溜り部２３を通って、基材排出口２５から排出される。 The liquid reservoir 23 includes a base material introduction port 24 that opens upstream (left side in FIG. 2) in the conveying direction of the base material 2 and a base that opens downstream (right side in FIG. 2) in the conveying direction of the base material 2. and a material outlet 25 . The base material introduction port 24 and the base material discharge port 25 face each other in the transport direction. The substrate 2 is introduced from the substrate introduction port 24 , passes through the liquid reservoir 23 , and is discharged from the substrate discharge port 25 .

図３，４に示すように、液溜り部２３は、基材２の幅方向における両側にそれぞれ位置する側面部２６を含む。側面部２６とは、液溜り部２３の幅方向端部を構成する搬送方向及び厚み方向に延びる面をいう。側面部２６は、幅方向一方側（図４における左側）の第１側面部２６ａ及び幅方向他方側（図４における右側）の第２側面部２６ｂから構成されている。第１側面部２６ａと第２側面部２６ｂとは、幅方向において、互いに対向している。 As shown in FIGS. 3 and 4, the liquid reservoir 23 includes side portions 26 located on both sides of the substrate 2 in the width direction. The side surface portion 26 is a surface extending in the conveying direction and the thickness direction forming the width direction end portion of the liquid pool portion 23 . The side portion 26 is composed of a first side portion 26a on one side in the width direction (left side in FIG. 4) and a second side portion 26b on the other side in the width direction (right side in FIG. 4). The first side portion 26a and the second side portion 26b face each other in the width direction.

図４に示すように、幅方向における両側の側面部２６、すなわち第１側面部２６ａ及び第２側面部２６ｂには、露出口２９がそれぞれ設けられている。各露出口２９は、第１側面部２６ａ及び第２側面部２６ｂ各々において、基材導入口２４側（上流側）から基材排出口２５側（下流側）に亘って、開口している（図２参照）。すなわち、第１側面部２６ａ及び第２側面部２６ｂは、開放されている。図４に示すように、露出口２９からは、基材２の幅方向における一部が、液溜り部２３の外部に突出可能である。 As shown in FIG. 4, exposure openings 29 are provided on both lateral side portions 26 in the width direction, that is, on the first side portion 26a and the second side portion 26b. Each exposure port 29 is open from the base material introduction port 24 side (upstream side) to the base material discharge port 25 side (downstream side) on each of the first side surface portion 26a and the second side surface portion 26b ( See Figure 2). That is, the first side portion 26a and the second side portion 26b are open. As shown in FIG. 4 , a portion of the substrate 2 in the width direction can protrude outside the liquid reservoir 23 through the exposure opening 29 .

図２，４に示すように、鉛直方向下側の第１ブロック（一対のブロックのうちの一方のブロック）２１における液溜り部２３に臨む面には、第１塗液供給口３１が設けられている。第１塗液供給口３１は、液溜り部２３に臨むとともに、液溜り部２３に塗液Ｃを供給する。 As shown in FIGS. 2 and 4, a first coating liquid supply port 31 is provided on a surface of a vertically lower first block (one block of a pair of blocks) 21 facing the liquid pool portion 23 . ing. The first coating liquid supply port 31 faces the liquid pool portion 23 and supplies the coating liquid C to the liquid pool portion 23 .

鉛直方向上側の第２ブロック（一対のブロックのうちの他方のブロック）２２における液溜り部２３に臨む面には、第２塗液供給口３２が設けられている。第２塗液供給口３２は、液溜り部２３に臨むとともに、液溜り部２３に塗液Ｃを供給する。 A second coating liquid supply port 32 is provided on the surface facing the liquid reservoir 23 of the vertically upper second block 22 (the other block of the pair of blocks). The second coating liquid supply port 32 faces the liquid pool portion 23 and supplies the coating liquid C to the liquid pool portion 23 .

図３に示すように、第１塗液供給口３１は、搬送方向及び幅方向に並んで複数個(例えば９個)配置されている。第２塗液供給口３２は、搬送方向及び幅方向に並んで複数個(例えば９個)配置されている。なお、第１塗液供給口３１及び第２塗液供給口３２は、１個ずつでもよい。各塗液供給口３１，３２の断面形状は、例えば円形や楕円形等である。図２，４に示すように、第１塗液供給口３１と第２塗液供給口３２とは、基材２の厚み方向に互いに対向している。 As shown in FIG. 3, a plurality of (for example, nine) first coating liquid supply ports 31 are arranged side by side in the transport direction and the width direction. A plurality (for example, nine) of the second coating liquid supply ports 32 are arranged side by side in the transport direction and the width direction. The number of the first coating liquid supply port 31 and the number of the second coating liquid supply port 32 may be one each. The cross-sectional shape of each coating liquid supply port 31, 32 is, for example, circular or elliptical. As shown in FIGS. 2 and 4 , the first coating liquid supply port 31 and the second coating liquid supply port 32 face each other in the thickness direction of the substrate 2 .

図１に示すように、塗液供給装置４０は、塗液Ｃを塗工装置２０に供給するための装置であり、塗液供給機構としての塗液供給ポンプ４１と、塗液供給管４２と、で構成されている。塗液供給ポンプ４１及び塗液供給管４２は、第１ブロック２１及び第２ブロック２２（一対のブロック）の外部に、設けられている。 As shown in FIG. 1, the coating liquid supply device 40 is a device for supplying the coating liquid C to the coating device 20, and includes a coating liquid supply pump 41 as a coating liquid supply mechanism and a coating liquid supply pipe 42. , consists of The coating liquid supply pump 41 and the coating liquid supply pipe 42 are provided outside the first block 21 and the second block 22 (a pair of blocks).

塗液供給管４２は、塗液供給ポンプ４１から出発して、第１塗液供給管４３と、第２塗液供給管４４と、に分岐されている。第１塗液供給管４３は、第１ブロック２１に対応している。第２塗液供給管４４は、第２ブロック２２に対応している。図２，４に示すように、第１塗液供給管４３は、第１主管４３ａと、第１主管４３ａから分岐するとともに各第１塗液供給口３１に対応した複数の第１分岐管４３ｂと、を含む。第２塗液供給管４４は、第２主管４４ａと、第２主管４４ａから分岐するとともに各第２塗液供給口３２に対応した複数の第２分岐管４４ｂと、を含む。 The coating liquid supply pipe 42 starts from the coating liquid supply pump 41 and branches into a first coating liquid supply pipe 43 and a second coating liquid supply pipe 44 . The first coating liquid supply pipe 43 corresponds to the first block 21 . The second coating liquid supply pipe 44 corresponds to the second block 22 . As shown in FIGS. 2 and 4, the first coating liquid supply pipe 43 includes a first main pipe 43a and a plurality of first branch pipes 43b branched from the first main pipe 43a and corresponding to the respective first coating liquid supply ports 31. and including. The second coating liquid supply pipe 44 includes a second main pipe 44 a and a plurality of second branch pipes 44 b branching from the second main pipe 44 a and corresponding to the respective second coating liquid supply ports 32 .

ここで、図１，２，４に示すように、第１ブロック（一対のブロックのうちの一方のブロック）２１の内部には、各第１塗液供給口３１に対応するように、第１塗液供給路３３が設けられている。第１塗液供給路３３は、その上流側で第１塗液供給管４３を介して塗液供給ポンプ４１に連通しているとともに、その下流側で第１塗液供給口３１に連通している。第１塗液供給路３３は、厚み方向に略真直ぐに延びている。 Here, as shown in FIGS. 1, 2 and 4, inside the first block (one block of the pair of blocks) 21, first coating liquid supply ports 31 are provided so as to correspond to the respective first coating liquid supply ports 31. A coating liquid supply path 33 is provided. The first coating liquid supply path 33 communicates with the coating liquid supply pump 41 via the first coating liquid supply pipe 43 on its upstream side, and communicates with the first coating liquid supply port 31 on its downstream side. there is The first coating liquid supply path 33 extends substantially straight in the thickness direction.

同様に、第２ブロック（一対のブロックのうちの他方のブロック）２２の内部には、各第２塗液供給口３２に対応するように、第２塗液供給路３４が設けられている。第２塗液供給路３４は、その上流側で第２塗液供給管４４を介して塗液供給ポンプ４１に連通しているとともに、その下流側で第２塗液供給口３２に連通している。第２塗液供給路３４は、厚み方向に略真直ぐに延びている。なお、第１ブロック２１及び第２ブロック２２の内部に、マニホールドがあってもよい。 Similarly, inside the second block (the other block of the pair of blocks) 22 , second coating liquid supply paths 34 are provided so as to correspond to the respective second coating liquid supply ports 32 . The second coating liquid supply path 34 communicates with the coating liquid supply pump 41 via the second coating liquid supply pipe 44 on its upstream side, and communicates with the second coating liquid supply port 32 on its downstream side. there is The second coating liquid supply path 34 extends substantially straight in the thickness direction. A manifold may be provided inside the first block 21 and the second block 22 .

第１塗液供給管４３は、塗液供給ポンプ４１と第１塗液供給路３３とを連通している。第２塗液供給管４４は、塗液供給ポンプ４１と第２塗液供給路３４とを連通している。第１塗液供給管４３及び第２塗液供給管４４において、各第１分岐管４３ｂ及び各第２分岐管４４ｂには、圧力計（図示せず）が設けられている。 The first coating liquid supply pipe 43 communicates the coating liquid supply pump 41 and the first coating liquid supply path 33 . The second coating liquid supply pipe 44 communicates the coating liquid supply pump 41 and the second coating liquid supply path 34 . In the first coating liquid supply pipe 43 and the second coating liquid supply pipe 44, each first branch pipe 43b and each second branch pipe 44b are provided with pressure gauges (not shown).

塗液供給ポンプ４１は、例えば、スクリューポンプ、ダイアフラムポンプ、シリンジポンプ又はチューブポンプ等の定量供給可能なものを採用することが好ましい。塗液供給ポンプ４１の代わりに、塗液供給機構として、供給タンクに圧縮空気を導入して圧力送液してもよい。図示しないが、塗工停止時において液溜り部２３の塗液Ｃを除去するために、塗液排出機構を設けてもよい。 The coating liquid supply pump 41 preferably employs, for example, a screw pump, a diaphragm pump, a syringe pump, or a tube pump capable of supplying a constant amount of liquid. Instead of the coating liquid supply pump 41, compressed air may be introduced into the supply tank to supply the liquid under pressure as a coating liquid supply mechanism. Although not shown, a coating liquid discharge mechanism may be provided to remove the coating liquid C in the liquid pool 23 when coating is stopped.

第１塗液供給口３１及び第２塗液供給口３２を介して液溜り部２３に供給される塗液Ｃの量は、基材排出口２５を介して液溜り部２３から基材２と伴に排出される塗液Ｃ（塗膜Ｆ）の量と、塗液排出機構を介して液溜り部２３から排出される塗液Ｃの量と、の和に略等しいことが好ましい。 The amount of the coating liquid C supplied to the liquid reservoir 23 through the first coating liquid supply port 31 and the second coating liquid supply port 32 varies from the liquid reservoir 23 to the substrate 2 through the substrate discharge port 25. It is preferable that the sum of the amount of the coating liquid C (coating film F) discharged together with the coating liquid C and the amount of the coating liquid C discharged from the liquid reservoir 23 via the coating liquid discharge mechanism be substantially equal.

図２，４に示すように、第１塗液供給管４３の第１主管４３ａの断面積と第２塗液供給管４４の第２主管４４ａの断面積とは、互いに等しい。第１塗液供給管４３の第１分岐管４３ｂの断面積と第２塗液供給管４４の第２分岐管４４ｂの断面積とは、互いに等しい。 As shown in FIGS. 2 and 4, the cross-sectional area of the first main pipe 43a of the first coating liquid supply pipe 43 and the cross-sectional area of the second main pipe 44a of the second coating liquid supply pipe 44 are equal to each other. The cross-sectional area of the first branch pipe 43b of the first coating liquid supply pipe 43 and the cross-sectional area of the second branch pipe 44b of the second coating liquid supply pipe 44 are equal to each other.

図２，４に示すように、第１塗液供給口３１の断面積は、第２塗液供給口３２の断面積よりも大きい。第１塗液供給路３３の断面積は、第２塗液供給路３４の断面積よりも大きい。 As shown in FIGS. 2 and 4 , the cross-sectional area of the first coating liquid supply port 31 is larger than the cross-sectional area of the second coating liquid supply port 32 . The cross-sectional area of the first coating liquid supply path 33 is larger than the cross-sectional area of the second coating liquid supply path 34 .

第１塗液供給口３１（第１塗液供給路３３）の断面積は、第２塗液供給口３２（第２塗液供給路３４）の断面積に対して、１０％以上大きいことが好ましい。 The cross-sectional area of the first coating liquid supply port 31 (first coating liquid supply path 33) is larger than the cross-sectional area of the second coating liquid supply port 32 (second coating liquid supply path 34) by 10% or more. preferable.

第１塗液供給口３１（第１塗液供給路３３）の断面積が第２塗液供給口３２（第２塗液供給路３４）の断面積よりも大きいので、第１塗液供給口３１（第１塗液供給路３３）における塗液Ｃの圧力損失は、第２塗液供給口３２（第２塗液供給路３４）における塗液Ｃの圧力損失よりも、小さい。 Since the cross-sectional area of the first coating liquid supply port 31 (first coating liquid supply path 33) is larger than the cross-sectional area of the second coating liquid supply port 32 (second coating liquid supply path 34), the first coating liquid supply port The pressure loss of the coating liquid C in 31 (the first coating liquid supply path 33) is smaller than the pressure loss of the coating liquid C in the second coating liquid supply port 32 (the second coating liquid supply path 34).

したがって、第１塗液供給口３１から液溜り部２３に供給される塗液Ｃの圧力は、第２塗液供給口３２から液溜り部２３に供給される塗液Ｃの圧力よりも、高い。 Therefore, the pressure of the coating liquid C supplied to the liquid pool 23 from the first coating liquid supply port 31 is higher than the pressure of the coating liquid C supplied to the liquid pool 23 from the second coating liquid supply port 32. .

（塗工態様）
塗液供給ポンプ４１を駆動することによって、塗液Ｃは、第１塗液供給管４３及び第２塗液供給管４４並びに第１塗液供給路３３及び第２塗液供給路３４を介して、第１塗液供給口３１及び第２塗液供給口３２から液溜り部２３に供給される。液溜り部２３に塗液Ｃが溜められた状態で、第１塗液供給口３１及び第２塗液供給口３２から液溜り部２３に塗液Ｃを供給しながら、基材２を液溜り部２３に通す。これにより、基材２の両面に対して塗液Ｃが塗布されて、基材２の両面に塗膜Ｆが形成される。 (Coating mode)
By driving the coating liquid supply pump 41, the coating liquid C is supplied through the first coating liquid supply pipe 43, the second coating liquid supply pipe 44, the first coating liquid supply path 33, and the second coating liquid supply path 34. , the first coating liquid supply port 31 and the second coating liquid supply port 32 to the liquid pool portion 23 . In a state in which the coating liquid C is stored in the liquid pooling portion 23, the substrate 2 is caused to pool while supplying the coating liquid C from the first coating liquid supply port 31 and the second coating liquid supply port 32 to the liquid pooling portion 23. Pass through part 23 . As a result, the coating liquid C is applied to both surfaces of the substrate 2 to form coating films F on both surfaces of the substrate 2 .

第１塗液供給口３１及び第２塗液供給口３２を介して液溜り部２３に供給される塗液Ｃの一部は、塗膜Ｆとして、基材排出口２５を介して液溜り部２３から基材２と伴に排出される。塗液Ｃの残部は、塗液排出機構（図示せず）を介して液溜り部２３から排出される。 A part of the coating liquid C supplied to the liquid pool portion 23 through the first coating liquid supply port 31 and the second coating liquid supply port 32 passes through the substrate discharge port 25 as the coating film F to the liquid pool portion 23 . It is discharged from 23 together with the substrate 2 . The remainder of the coating liquid C is discharged from the liquid reservoir 23 via a coating liquid discharge mechanism (not shown).

図３，４に示すように、基材２の幅方向中間部２ｂを、塗液Ｃを塗布する特定部位Ｐとする。一方、基材２の幅方向両端部２ａ各々を、塗液Ｃを塗布しない非特定部位Ｑとする。基材２を液溜り部２３に通す際、基材２の各非特定部位Ｑ（幅方向両端部２ａ各々）を、各露出口２９から液溜り部２３の外部に突出させる。これにより、基材２の特定部位Ｐの両面に対して塗液Ｃが塗布されて、基材２の特定部位Ｐの両面に塗膜Ｆが形成される。一方、基材２の各非特定部位Ｑの両面には、塗液Ｃが塗布されないので、塗膜Ｆが形成されない。 As shown in FIGS. 3 and 4, the intermediate portion 2b in the width direction of the substrate 2 is defined as a specific portion P to which the coating liquid C is applied. On the other hand, each of the widthwise end portions 2a of the substrate 2 is defined as a non-specific portion Q to which the coating liquid C is not applied. When the base material 2 is passed through the liquid pool part 23 , each non-specific part Q (both ends 2 a in the width direction) of the base material 2 is made to protrude outside the liquid pool part 23 through the exposure openings 29 . As a result, the coating liquid C is applied to both surfaces of the specific portion P of the base material 2 , and coating films F are formed on both surfaces of the specific portion P of the base material 2 . On the other hand, since the coating liquid C is not applied to both surfaces of each non-specific portion Q of the base material 2, the coating film F is not formed.

基材２が基材排出口２５を介して液溜り部２３から排出される際、基材排出口２５の近傍において、基材２の両面に塗布された塗液Ｃに対して、強いせん断力が加わる。このため、図５に示すように、基材２の塗膜Ｆを含めた厚み寸法Ｔは、基材排出口２５（液溜り部２３）の隙間寸法Ｈに対して、やや小さくなる。 When the base material 2 is discharged from the liquid reservoir 23 through the base material discharge port 25, a strong shearing force is applied to the coating liquid C applied to both surfaces of the base material 2 in the vicinity of the base material discharge port 25. is added. Therefore, as shown in FIG. 5, the thickness dimension T of the substrate 2 including the coating film F is slightly smaller than the gap dimension H of the substrate discharge port 25 (liquid pool portion 23).

（作用効果）
本実施形態によれば、基材２の搬送方向が水平方向なので、基材２は、重力によって、液溜り部２３における鉛直方向（厚み方向）中央位置よりも鉛直方向（厚み方向）下側（第１ブロック２１側）に、位置付けられやすい。液溜り部２３において、基材２が鉛直方向（厚み方向）下側（第１ブロック２１側）に位置すると、基材２の上面に形成される塗膜Ｆの厚みが大きくなる一方、基材２の下面に形成される塗膜Ｆの厚みが小さくなって（カスレて）しまう。すなわち、基材２の両面各々に形成される塗膜Ｆの厚みが、上面（表面）と下面（裏面）とで不均一になってしまう。 (Effect)
According to this embodiment, since the conveying direction of the base material 2 is the horizontal direction, the base material 2 is moved downward (in the thickness direction) in the vertical direction (thickness direction) from the center position of the liquid pool 23 in the vertical direction (thickness direction) by gravity. (first block 21 side). When the substrate 2 is positioned on the lower side (first block 21 side) in the vertical direction (thickness direction) in the liquid pool portion 23, the thickness of the coating film F formed on the upper surface of the substrate 2 increases, while the thickness of the substrate increases. The thickness of the coating film F formed on the lower surface of 2 becomes small (scratchy). That is, the thickness of the coating film F formed on each of both surfaces of the base material 2 becomes uneven between the upper surface (front surface) and the lower surface (rear surface).

そこで、本実施形態では、下側の第１塗液供給口３１（第１塗液供給路３３）の断面積を上側の第２塗液供給口３２（第２塗液供給路３４）の断面積よりも大きくすることによって、下側の第１塗液供給口３１（第１塗液供給路３３）における塗液Ｃの圧力損失を、上側の第２塗液供給口３２（第２塗液供給路３４）における塗液Ｃの圧力損失よりも、小さくしている。 Therefore, in the present embodiment, the cross-sectional area of the first coating liquid supply port 31 (first coating liquid supply path 33) on the lower side is equal to that of the second coating liquid supply port 32 (second coating liquid supply path 34) on the upper side. By making it larger than the area, the pressure loss of the coating liquid C in the lower first coating liquid supply port 31 (first coating liquid supply path 33) is reduced to the upper second coating liquid supply port 32 (second coating liquid It is made smaller than the pressure loss of the coating liquid C in the supply path 34).

このため、下側の第１塗液供給口３１から液溜り部２３に供給される塗液Ｃの圧力は、上側の第２塗液供給口３２から液溜り部２３に供給される塗液Ｃの圧力よりも、高くなる。すなわち、基材２の下面に与えられる圧力が、基材２の上面に与えられる圧力よりも大きくなる。 Therefore, the pressure of the coating liquid C supplied to the liquid pool 23 from the first coating liquid supply port 31 on the lower side is the same as the pressure of the coating liquid C supplied to the liquid pool 23 from the second coating liquid supply port 32 on the upper side. higher than the pressure of That is, the pressure applied to the bottom surface of the base material 2 is greater than the pressure applied to the top surface of the base material 2 .

このため、基材２は、液溜り部２３において、厚み方向（鉛直方向）の下側から上側へと押し上げられる。そして、基材２は、液溜り部２３において、厚み方向（鉛直方向）の中央位置近傍に位置付けられる。これにより、基材２の両面各々に形成される塗膜Ｆの厚みを、上面と下面とで均一にすることができる。 Therefore, the substrate 2 is pushed upward from the lower side in the thickness direction (vertical direction) in the liquid pool portion 23 . Then, the substrate 2 is positioned near the central position in the thickness direction (vertical direction) in the liquid pool portion 23 . Thereby, the thickness of the coating film F formed on each of both surfaces of the substrate 2 can be made uniform between the upper surface and the lower surface.

このように、搬送される基材２の両面に塗膜Ｆを形成する塗工装置２０において、基材２の両面に形成される塗膜Ｆの厚みを調整することができる。 Thus, in the coating device 20 that forms the coating films F on both surfaces of the substrate 2 being transported, the thickness of the coating films F formed on both surfaces of the substrate 2 can be adjusted.

さらに、第１塗液供給口３１（第１塗液供給路３３）の断面積を第２塗液供給口３２（第２塗液供給路３４）の断面積よりも大きくするだけでよいので、塗工装置２０の構成が簡単である。 Furthermore, the cross-sectional area of the first coating liquid supply port 31 (the first coating liquid supply path 33) may be made larger than the cross-sectional area of the second coating liquid supply port 32 (the second coating liquid supply path 34). The structure of the coating device 20 is simple.

本実施形態では、幅方向における少なくとも片側の側面部２６に露出口２９が設けられているので、基材２の幅方向における一部を、露出口２９から液溜り部２３の外部に突出させることができる。これにより、搬送される基材２の幅方向における特定部位Ｐの両面に選択的に塗膜Ｆを形成することができる。 In this embodiment, since the exposure opening 29 is provided in the side surface portion 26 on at least one side in the width direction, a part of the substrate 2 in the width direction can be protruded from the exposure opening 29 to the outside of the liquid pool portion 23 . can be done. Thereby, the coating film F can be selectively formed on both surfaces of the specific part P in the width direction of the conveyed base material 2 .

＜第２の実施形態＞
第２の実施形態に係る塗工装置２０について、図６を参照しながら説明する。以下の説明において、上記実施形態と同様の構成については同じ符号を付し、詳細な説明を省略する場合がある。 <Second embodiment>
A coating device 20 according to a second embodiment will be described with reference to FIG. In the following description, configurations similar to those of the above-described embodiment are denoted by the same reference numerals, and detailed description may be omitted.

本実施形態では、第１塗液供給口３１の断面積と第２塗液供給口３２の断面積とは、互いに等しい。第１塗液供給路３３の断面積と第２塗液供給路３４の断面積とは、互いに等しい。 In this embodiment, the cross-sectional area of the first coating liquid supply port 31 and the cross-sectional area of the second coating liquid supply port 32 are equal to each other. The cross-sectional area of the first coating liquid supply path 33 and the cross-sectional area of the second coating liquid supply path 34 are equal to each other.

そして、下側の第１塗液供給管４３の第１主管４３ａの断面積は、上側の第２塗液供給管４４の第２主管４４ａの断面積よりも大きい。なお、第１塗液供給管４３の第１分岐管４３ｂの断面積と第２塗液供給管４４の第２分岐管４４ｂの断面積とは、互いに等しい。 The cross-sectional area of the first main pipe 43a of the first coating liquid supply pipe 43 on the lower side is larger than the cross-sectional area of the second main pipe 44a of the second coating liquid supply pipe 44 on the upper side. The cross-sectional area of the first branch pipe 43b of the first coating liquid supply pipe 43 and the cross-sectional area of the second branch pipe 44b of the second coating liquid supply pipe 44 are equal to each other.

第１塗液供給管４３の第１主管４３ａの断面積は、第２塗液供給管４４の第２主管４４ａの断面積に対して、１０％以上大きいことが好ましい。その他の構成は、第１の実施形態と同様である。 The cross-sectional area of the first main pipe 43a of the first coating liquid supply pipe 43 is preferably larger than the cross-sectional area of the second main pipe 44a of the second coating liquid supply pipe 44 by 10% or more. Other configurations are the same as those of the first embodiment.

本実施形態によれば、第１の実施形態と同様の効果が得られる。 According to this embodiment, the same effects as those of the first embodiment can be obtained.

＜第３の実施形態＞
第３の実施形態に係る塗工装置２０について、図７を参照しながら説明する。以下の説明において、上記実施形態と同様の構成については同じ符号を付し、詳細な説明を省略する場合がある。 <Third Embodiment>
A coating device 20 according to a third embodiment will be described with reference to FIG. In the following description, configurations similar to those of the above-described embodiment are denoted by the same reference numerals, and detailed description may be omitted.

本実施形態では、第１塗液供給口３１の断面積と第２塗液供給口３２の断面積とは、互いに等しい。第１塗液供給路３３の断面積と第２塗液供給路３４の断面積とは、互いに等しい。第１塗液供給管４３の第１主管４３ａの断面積と第２塗液供給管４４の第２主管４４ａの断面積とは、互いに等しい。第１塗液供給管４３の第１分岐管４３ｂの断面積と第２塗液供給管４４の第２分岐管４４ｂの断面積とは、互いに等しい。 In this embodiment, the cross-sectional area of the first coating liquid supply port 31 and the cross-sectional area of the second coating liquid supply port 32 are equal to each other. The cross-sectional area of the first coating liquid supply path 33 and the cross-sectional area of the second coating liquid supply path 34 are equal to each other. The cross-sectional area of the first main pipe 43a of the first coating liquid supply pipe 43 and the cross-sectional area of the second main pipe 44a of the second coating liquid supply pipe 44 are equal to each other. The cross-sectional area of the first branch pipe 43b of the first coating liquid supply pipe 43 and the cross-sectional area of the second branch pipe 44b of the second coating liquid supply pipe 44 are equal to each other.

そして、第２塗液供給管４４の第２主管４４ａには、減圧バルブ４５が設けられている。第２塗液供給管４４の第２主管４４ａを流れる塗液Ｃが、減圧バルブ４５によって、１０％以上減圧されることが好ましい。減圧バルブ４５としては、種々の公知のバルブが適用され得る。その他の構成は、第１の実施形態と同様である。 A decompression valve 45 is provided in the second main pipe 44 a of the second coating liquid supply pipe 44 . It is preferable that the pressure of the coating liquid C flowing through the second main pipe 44 a of the second coating liquid supply pipe 44 is reduced by 10% or more by the pressure reducing valve 45 . Various known valves can be applied as the pressure reducing valve 45 . Other configurations are the same as those of the first embodiment.

本実施形態によれば、第１の実施形態と同様の効果が得られる。さらに、減圧バルブ４５による絞り量を調整することによって、比較的に自由に、第２塗液供給口３２から液溜り部２３に供給される塗液Ｃの圧力を調整し得る。 According to this embodiment, the same effects as those of the first embodiment can be obtained. Furthermore, by adjusting the throttle amount by the decompression valve 45, the pressure of the coating liquid C supplied from the second coating liquid supply port 32 to the liquid pool portion 23 can be relatively freely adjusted.

＜第４の実施形態＞
第４の実施形態に係る塗工装置２０について、図８を参照しながら説明する。以下の説明において、上記実施形態と同様の構成については同じ符号を付し、詳細な説明を省略する場合がある。 <Fourth Embodiment>
A coating device 20 according to a fourth embodiment will be described with reference to FIG. In the following description, configurations similar to those of the above-described embodiment are denoted by the same reference numerals, and detailed description may be omitted.

本実施形態では、第２ブロック２２には、第１塗液供給口３１（第１塗液供給路３３）及び第２塗液供給口３２（第２塗液供給路３４）が設けられていない。 In this embodiment, the second block 22 is not provided with the first coating liquid supply port 31 (the first coating liquid supply path 33) and the second coating liquid supply port 32 (the second coating liquid supply path 34). .

そして、第１ブロック２１（一対のブロックのうちの一方のブロック）には、第１塗液供給口３１（第１塗液供給路３３）及び第２塗液供給口３２（第２塗液供給路３４）の両方が設けられている。 The first block 21 (one of the pair of blocks) has a first coating liquid supply port 31 (first coating liquid supply path 33) and a second coating liquid supply port 32 (second coating liquid supply path). 34) are provided.

詳細には、第１ブロック２１の幅方向両端部には、第１塗液供給口３１（第１塗液供給路３３）が設けられている。第１ブロック２１の幅方向中央部には、第２塗液供給口３２（第２塗液供給路３４）が設けられている。すなわち、第１塗液供給口３１（第１塗液供給路３３）と第２塗液供給口３２（第２塗液供給路３４）とは、幅方向において互いに間隔を空けて配置されている。 Specifically, first coating liquid supply ports 31 (first coating liquid supply paths 33) are provided at both ends of the first block 21 in the width direction. A second coating liquid supply port 32 (second coating liquid supply path 34 ) is provided in the widthwise central portion of the first block 21 . That is, the first coating liquid supply port 31 (first coating liquid supply path 33) and the second coating liquid supply port 32 (second coating liquid supply path 34) are arranged with a gap in the width direction. .

第１塗液供給口３１（第１塗液供給路３３）の断面積は、第２塗液供給口３２（第２塗液供給路３４）の断面積よりも大きい。 The cross-sectional area of the first coating liquid supply port 31 (first coating liquid supply path 33) is larger than the cross-sectional area of the second coating liquid supply port 32 (second coating liquid supply path 34).

塗液供給ポンプ４１（図１参照）には、共通塗液供給管（主管）４６が接続されている。共通塗液供給管４６からは、第１塗液供給管（分岐管）４７及び第２塗液供給管（分岐管）４８が分岐している。第１塗液供給管４７は、第１塗液供給路３３に接続されている。第２塗液供給管４８は、第２塗液供給路３４に接続されている。すなわち、第１塗液供給管４７は、共通塗液供給管４６と共に、塗液供給ポンプ４１と第１塗液供給路３３とを連通している。第２塗液供給管４８は、共通塗液供給管４６と共に、塗液供給ポンプ４１と第２塗液供給路３４とを連通している。 A common coating liquid supply pipe (main pipe) 46 is connected to the coating liquid supply pump 41 (see FIG. 1). A first coating liquid supply pipe (branch pipe) 47 and a second coating liquid supply pipe (branch pipe) 48 are branched from the common coating liquid supply pipe 46 . The first coating liquid supply pipe 47 is connected to the first coating liquid supply path 33 . The second coating liquid supply pipe 48 is connected to the second coating liquid supply path 34 . That is, the first coating liquid supply pipe 47 communicates the coating liquid supply pump 41 and the first coating liquid supply path 33 together with the common coating liquid supply pipe 46 . The second coating liquid supply pipe 48 communicates the coating liquid supply pump 41 and the second coating liquid supply path 34 together with the common coating liquid supply pipe 46 .

なお、本実施形態では、第１ブロック２１側の第１塗液供給口３１及び第２塗液供給口３２から供給される塗液Ｃが、基材２を厚み方向に貫通して、第２ブロック２２側に回り込むようにするために、基材２は、その厚み方向に塗液Ｃを連通させる連通部（例えば、パンチングメタル、櫛歯形状、梯子形状、メッシュ状又は多孔質状など）を、含むことが好ましい。その他の構成は、第１の実施形態と同様である。 In this embodiment, the coating liquid C supplied from the first coating liquid supply port 31 and the second coating liquid supply port 32 on the first block 21 side penetrates the substrate 2 in the thickness direction, In order to wrap around the block 22 side, the base material 2 has a communication part (for example, punching metal, comb tooth shape, ladder shape, mesh shape, porous shape, etc.) that allows the coating liquid C to communicate in the thickness direction. , preferably includes. Other configurations are the same as those of the first embodiment.

本実施形態によれば、基材２の両面に形成される塗膜Ｆの厚みを、幅方向において調整することができる。また、基材２の下面における幅方向両端部に与えられる圧力を大きくすることによって、基材２の弛みを抑制する上で有利である。 According to this embodiment, the thickness of the coating film F formed on both surfaces of the substrate 2 can be adjusted in the width direction. In addition, increasing the pressure applied to both widthwise end portions of the lower surface of the base material 2 is advantageous in suppressing slackness of the base material 2 .

＜第５の実施形態＞
第５の実施形態に係る塗工装置２０について、図９を参照しながら説明する。以下の説明において、上記実施形態と同様の構成については同じ符号を付し、詳細な説明を省略する場合がある。 <Fifth Embodiment>
A coating device 20 according to a fifth embodiment will be described with reference to FIG. In the following description, configurations similar to those of the above-described embodiment are denoted by the same reference numerals, and detailed description may be omitted.

本実施形態では、第１ブロック２１の搬送方向両端部には、第１塗液供給口３１（第１塗液供給路３３）が設けられている。第１ブロック２１の搬送方向中央部には、第２塗液供給口３２（第２塗液供給路３４）が設けられている。すなわち、第１塗液供給口３１（第１塗液供給路３３）と第２塗液供給口３２（第２塗液供給路３４）とは、搬送方向において互いに間隔を空けて配置されている。その他の構成は、第４の実施形態と同様である。 In this embodiment, first coating liquid supply ports 31 (first coating liquid supply paths 33) are provided at both ends of the first block 21 in the transport direction. A second coating liquid supply port 32 (second coating liquid supply path 34) is provided at the center of the first block 21 in the transport direction. That is, the first coating liquid supply port 31 (first coating liquid supply path 33) and the second coating liquid supply port 32 (second coating liquid supply path 34) are arranged with a space therebetween in the transport direction. . Other configurations are the same as those of the fourth embodiment.

本実施形態によれば、基材２の両面に形成される塗膜Ｆの厚みを、搬送方向において調整することができる。 According to this embodiment, the thickness of the coating film F formed on both surfaces of the substrate 2 can be adjusted in the transport direction.

＜第６の実施形態＞
第６の実施形態に係る塗工装置２０について、図１０を参照しながら説明する。以下の説明において、上記実施形態と同様の構成については同じ符号を付し、詳細な説明を省略する場合がある。 <Sixth Embodiment>
A coating device 20 according to the sixth embodiment will be described with reference to FIG. In the following description, configurations similar to those of the above-described embodiment are denoted by the same reference numerals, and detailed description may be omitted.

本実施形態では、露出口２９は、第１側面部２６ａ及び第２側面部２６ｂのいずれにも設けられていない。すなわち、第１側面部２６ａ及び第２側面部２６ｂ（幅方向における両側の側面部）は、いずれも閉塞している。第１側面部２６ａ及び第２側面部２６ｂは、液溜り部２３の幅方向両側を覆う２つのサイドブロック２７における液溜り部２３に臨む側面で構成されている。 In this embodiment, the exposure opening 29 is not provided on either the first side surface portion 26a or the second side surface portion 26b. That is, both the first side portion 26a and the second side portion 26b (side portions on both sides in the width direction) are closed. The first side surface portion 26 a and the second side surface portion 26 b are formed by side surfaces of two side blocks 27 that cover both sides of the liquid pool portion 23 in the width direction and face the liquid pool portion 23 .

基材２の幅寸法Ｂは、各ブロック２１，２２の幅寸法（液溜り部２３の幅寸法）Ｌ２よりも小さい。また、基材２の幅方向全体を特定部位Ｐとし、非特定部位Ｑを設けない。すなわち、基材２の幅方向全体の両面に塗液Ｃが塗布されて、塗膜Ｆが形成される（全面塗り）。さらに、基材２の幅方向両側の側面２ｅにも塗液Ｃが塗布されて、塗膜Ｆが形成される。なお、第１ブロック２１及び第２ブロック２２並びにサイドブロック２７は、互いに一体物で形成されてもよい。その他の構成は、第１の実施形態と同様である。 The width dimension B of the base material 2 is smaller than the width dimension L2 of each of the blocks 21 and 22 (the width dimension of the liquid pool portion 23). Further, the entire width direction of the base material 2 is defined as the specific portion P, and the non-specific portion Q is not provided. That is, the coating liquid C is applied to both sides of the entire width direction of the base material 2 to form the coating film F (whole surface coating). Furthermore, the coating liquid C is also applied to the side surfaces 2e on both sides in the width direction of the base material 2, so that the coating film F is formed. Note that the first block 21, the second block 22, and the side blocks 27 may be formed integrally with each other. Other configurations are the same as those of the first embodiment.

＜その他の実施形態＞
以上、本開示を好適な実施形態により説明してきたが、こうした記述は限定事項ではなく、勿論、種々の改変が可能である。 <Other embodiments>
Although the present disclosure has been described in terms of preferred embodiments, such descriptions are not intended to be limiting, and various modifications are of course possible.

第４，５の実施形態（図８，９参照）において、第１塗液供給管（分岐管）４７の断面積を、第２塗液供給管（分岐管）４８の断面積よりも大きくしてもよい。また、第２塗液供給管（分岐管）４８に減圧バルブ４５を設けてもよい。 In the fourth and fifth embodiments (see FIGS. 8 and 9), the cross-sectional area of the first coating liquid supply pipe (branch pipe) 47 is made larger than the cross-sectional area of the second coating liquid supply pipe (branch pipe) 48. may A decompression valve 45 may be provided in the second coating liquid supply pipe (branch pipe) 48 .

第４，５の実施形態（図８，９参照）において、第１ブロック２１だけでなく、第２ブロック２２にも第１塗液供給口３１（第１塗液供給路３３）及び第２塗液供給口３２（第２塗液供給路３４）が設けられてもよい。 In the fourth and fifth embodiments (see FIGS. 8 and 9), not only the first block 21, but also the second block 22 has a first coating liquid supply port 31 (first coating liquid supply path 33) and a second coating liquid. A liquid supply port 32 (second coating liquid supply path 34) may be provided.

第１の実施形態（図１～５参照）において、第１塗液供給路３３の断面積と第２塗液供給路３４の断面積とが同じであって、且つ、第１塗液供給口３１の断面積のみが、第２塗液供給口３２の断面積よりも大きくてもよい。 In the first embodiment (see FIGS. 1 to 5), the cross-sectional area of the first coating liquid supply path 33 and the cross-sectional area of the second coating liquid supply path 34 are the same, and the first coating liquid supply port Only the cross-sectional area of 31 may be larger than the cross-sectional area of the second coating liquid supply port 32 .

第１塗液供給口３１及び第２塗液供給口３２を、互いに別の塗液供給ポンプに連通させてもよい。そして、一方の塗液供給ポンプから第１塗液供給口３１に供給される塗液Ｃの吐出圧を、他方の塗液供給ポンプから第２塗液供給口３２に供給される塗液Ｃの吐出圧よりも、大きくしてもよい。 The first coating liquid supply port 31 and the second coating liquid supply port 32 may be communicated with separate coating liquid supply pumps. Then, the discharge pressure of the coating liquid C supplied to the first coating liquid supply port 31 from one of the coating liquid supply pumps is changed to the pressure of the coating liquid C supplied to the second coating liquid supply port 32 from the other coating liquid supply pump. It may be larger than the discharge pressure.

第２塗液供給路３４又は第２塗液供給管４４，４８に曲折部、絞り部又は形状変化部などを設けることによって、塗液Ｃに圧力損失を生じさせてもよい。 The second coating liquid supply path 34 or the second coating liquid supply pipes 44 and 48 may be provided with a bent portion, a constricted portion, or a shape-changing portion, thereby causing a pressure loss in the coating liquid C. FIG.

塗工装置２０は、基材２の片面側の塗膜Ｆの厚みのみを積極的に厚くしたい場合にも、適用され得る。例えば、第１の実施形態において、断面積の大きな第１塗液供給口３１を上側の第２ブロック２２に設ける一方、断面積の小さな第２塗液供給口３２を下側の第１ブロック２１に設けることによって、基材２の上面の塗膜Ｆの厚みのみを積極的に厚くすることができる。 The coating device 20 can also be applied when it is desired to actively thicken only the coating film F on one side of the substrate 2 . For example, in the first embodiment, the first coating liquid supply port 31 with a large cross-sectional area is provided in the upper second block 22, while the second coating liquid supply port 32 with a small cross-sectional area is provided in the lower first block 21. Only the thickness of the coating film F on the upper surface of the base material 2 can be positively increased by providing the .

露出口２９は、幅方向における片側の側面部２６にのみ設けられてもよい。そして、基材２における幅方向片側部分のみを、特定部位Ｐとして、液溜り部２３に通してもよい。 The exposure opening 29 may be provided only on one side surface portion 26 in the width direction. Then, only one side portion in the width direction of the base material 2 may be passed through the liquid pool portion 23 as the specific portion P.

上記実施形態では、基材２の搬送方向は、水平方向であったが、これに限定されない。基材２は、例えば鉛直方向上方から下方へ、また鉛直方向下方から上方へ、さらには斜め方向に搬送されてもよい。 Although the conveying direction of the substrate 2 is the horizontal direction in the above embodiment, it is not limited to this. The substrate 2 may be conveyed, for example, from vertically upward to downward, from vertically downward to upward, or obliquely.

上記実施形態では、塗工装置２０は、ロールｔｏロール法によって連続搬送される基材２の両面に対して塗液Ｃを塗布するために用いられるが、これに限定されない。塗工装置２０は、例えば、ベルトコンベヤによって搬送されるガラス基板の両面に対して塗液Ｃを塗布するために用いられてもよい。 In the above-described embodiment, the coating device 20 is used to apply the coating liquid C to both surfaces of the substrate 2 that is continuously conveyed by the roll-to-roll method, but is not limited to this. The coating device 20 may be used, for example, to apply the coating liquid C to both sides of a glass substrate conveyed by a belt conveyor.

本開示に係る塗工方法は、塗工装置２０を用いて、第１塗液供給口３１及び第２塗液供給口３２から液溜り部２３に塗液Ｃを供給しながら、基材２を液溜り部２３に通す。 In the coating method according to the present disclosure, the coating device 20 is used to supply the coating liquid C from the first coating liquid supply port 31 and the second coating liquid supply port 32 to the liquid reservoir 23 while the substrate 2 is coated. It is passed through the liquid reservoir 23 .

＜設定条件＞
（実施例１）
基材２として、厚み０．１ｍｍのＳＵＳ３０４材を用いた。 <Setting conditions>
(Example 1)
A SUS304 material having a thickness of 0.1 mm was used as the base material 2 .

塗液Ｃとして、粘度ηが約１００Ｐａ・ｓの導電性ペーストを用いた。塗液Ｃの粘度ηは、回転式粘度計（ＴｈｅｒｍｏＳｃｉｅｎｔｉｆｉｃＭａｒｓ４０、ＨＡＡＫＥ製）を用いて測定した。なお、粘度ηの測定条件は、ステージの直径２０ｍｍ、測定子の直径２０ｍｍ、角度１°、測定ギャップ０．０５ｍｍ、せん断速度１／秒、測定温度２５℃とした。 As the coating liquid C, a conductive paste having a viscosity η of about 100 Pa·s was used. The viscosity η of the coating liquid C was measured using a rotary viscometer (Thermo Scientific Mars40, manufactured by HAAKE). The viscosity η was measured under conditions of a stage diameter of 20 mm, a probe diameter of 20 mm, an angle of 1°, a measurement gap of 0.05 mm, a shear rate of 1/sec, and a measurement temperature of 25°C.

第１の実施形態に係る塗工装置２０（図１～５参照）を用いた（ただし、各塗液供給口３１，３２を、各ブロック２１，２２の幅方向中央部のみに設けた）。具体的には、塗工装置２０は、卓上型塗工装置（ミニラボ、康井精機製）を用いた。第１ブロック２１及び第２ブロック２２は、ＳＵＳ３０４材で形成した。各ブロック２１，２２の長さ寸法Ｌ１を４０ｍｍ、幅寸法Ｌ２を５０ｍｍ、厚み寸法Ｌ３を１０ｍｍとした。 The coating apparatus 20 (see FIGS. 1 to 5) according to the first embodiment was used (however, the coating liquid supply ports 31 and 32 were provided only in the width direction central portions of the blocks 21 and 22). Specifically, as the coating device 20, a desktop coating device (Minilab, manufactured by Yasui Seiki Co., Ltd.) was used. The first block 21 and the second block 22 are made of SUS304 material. Each block 21, 22 has a length dimension L1 of 40 mm, a width dimension L2 of 50 mm, and a thickness dimension L3 of 10 mm.

第１ブロック２１の幅方向中央部に、直径２．６ｍｍの円形の第１塗液供給口３１を、１０ｍｍ間隔で搬送方向に並べて、計３個ずつ設けた。第２ブロック２２の幅方向中央部に、直径２．０ｍｍの円形の第２塗液供給口３２を、１０ｍｍ間隔で搬送方向に並べて、計３個ずつ設けた。 A total of three circular first coating liquid supply ports 31 each having a diameter of 2.6 mm were arranged in the conveying direction at intervals of 10 mm and provided in the central portion in the width direction of the first block 21 . A total of three circular second coating liquid supply ports 32 having a diameter of 2.0 mm were arranged in the conveying direction at intervals of 10 mm and provided in the central portion in the width direction of the second block 22 .

塗液供給ポンプ４１として、モーノポンプ（３ＨＭＣ０１０Ｆ、兵神装備製）を用いた。塗液供給ポンプ４１の吐出圧を、１０ｋＰａとした。基材供給装置１０の巻出側トルク及び巻取側トルクは、いずれも６０Ｎ・ｍとした。 As the coating liquid supply pump 41, a Mohno pump (3HMC010F, manufactured by Hyoshin Equipment Co., Ltd.) was used. The discharge pressure of the coating liquid supply pump 41 was set to 10 kPa. Both the unwinding side torque and the winding side torque of the substrate supply device 10 were set to 60 N·m.

第１塗液供給管４３の第１主管４３ａ及び第２塗液供給管４４の第２主管４４ａのサイズはともに、内径１．５９ｍｍ×外径３．１７ｍｍとした。 Both the first main pipe 43a of the first coating liquid supply pipe 43 and the second main pipe 44a of the second coating liquid supply pipe 44 had an inner diameter of 1.59 mm and an outer diameter of 3.17 mm.

第１ブロック２１と第２ブロック２２との隙間寸法Ｈは、ＳＵＳ３０４製のシムを用いて、０．２ｍｍに設定した。塗工速度（搬送速度）は、毎分０．３ｍに設定し、基材厚み方向が鉛直方向を向くように水平方向に搬送した。 A gap dimension H between the first block 21 and the second block 22 was set to 0.2 mm using a shim made of SUS304. The coating speed (conveyance speed) was set to 0.3 m per minute, and the substrate was conveyed horizontally so that the thickness direction of the substrate was oriented vertically.

塗膜Ｆの形成後、熱風乾燥炉（ＤＫＭ－４００、ヤマト科学製）を用いて、設定温度２００℃、ファン回転数５００ｒｐｍにて、３０分間乾燥し、乾燥膜を得た。 After the coating film F was formed, it was dried for 30 minutes using a hot air drying oven (DKM-400, manufactured by Yamato Scientific) at a set temperature of 200° C. and a fan speed of 500 rpm to obtain a dry film.

（実施例２）
第２の実施形態に係る塗工装置２０（図６参照）を用いた（ただし、各塗液供給口３１，３２を、各ブロック２１，２２の幅方向中央部のみに設けた）。第１塗液供給口３１の直径及び第２塗液供給口３２の直径はともに、２．０ｍｍとした。第１塗液供給管４３の第１主管４３ａのサイズは、内径３．１７ｍｍ×外径６．３５ｍｍとした。第２塗液供給管４４の第２主管４４ａのサイズは、内径１．５９ｍｍ×外径３．１７ｍｍとした。その他の構成は、実施例１と同様である。 (Example 2)
The coating apparatus 20 (see FIG. 6) according to the second embodiment was used (however, the coating liquid supply ports 31 and 32 were provided only in the widthwise central portions of the blocks 21 and 22). Both the diameter of the first coating liquid supply port 31 and the diameter of the second coating liquid supply port 32 were set to 2.0 mm. The size of the first main pipe 43a of the first coating liquid supply pipe 43 was 3.17 mm in inner diameter×6.35 mm in outer diameter. The size of the second main pipe 44a of the second coating liquid supply pipe 44 was 1.59 mm in inner diameter×3.17 mm in outer diameter. Other configurations are the same as those of the first embodiment.

（実施例３）
第３の実施形態に係る塗工装置２０（図７参照）を用いた（ただし、各塗液供給口３１，３２を、各ブロック２１，２２の幅方向中央部のみに設けた）。第１塗液供給口３１の直径及び第２塗液供給口３２の直径はともに、２．０ｍｍとした。第１塗液供給管４３の第１主管４３ａ及び第２塗液供給管４４の第２主管４４ａのサイズはともに、内径１．５９ｍｍ×外径３．１７ｍｍとした。第２塗液供給管４４の第２主管４４ａに、減圧バルブ４５を設けた。第２塗液供給管４４の第２主管４４ａを流れる塗液Ｃの圧力を、減圧バルブ４５によって、５ｋＰａ減圧した。その他の構成は、実施例１と同様である。 (Example 3)
A coating apparatus 20 (see FIG. 7) according to the third embodiment was used (however, the coating liquid supply ports 31 and 32 were provided only in the widthwise central portions of the blocks 21 and 22). Both the diameter of the first coating liquid supply port 31 and the diameter of the second coating liquid supply port 32 were set to 2.0 mm. Both the first main pipe 43a of the first coating liquid supply pipe 43 and the second main pipe 44a of the second coating liquid supply pipe 44 had an inner diameter of 1.59 mm and an outer diameter of 3.17 mm. A decompression valve 45 was provided on the second main pipe 44 a of the second coating liquid supply pipe 44 . The pressure of the coating liquid C flowing through the second main pipe 44 a of the second coating liquid supply pipe 44 was reduced by 5 kPa by the pressure reducing valve 45 . Other configurations are the same as those of the first embodiment.

（比較例）
第１塗液供給口３１の直径及び第２塗液供給口３２の直径はともに、２．０ｍｍとした。第１塗液供給管４３の第１主管４３ａ及び第２塗液供給管４４の第２主管４４ａのサイズはともに、内径１．５９ｍｍ×外径３．１７ｍｍとした。第２塗液供給管４４の第２主管４４ａに、減圧バルブ４５を設けなかった。その他の構成は、実施例１と同様である。なお、比較例に係る塗工装置は、本願発明者等が開発したものである。 (Comparative example)
Both the diameter of the first coating liquid supply port 31 and the diameter of the second coating liquid supply port 32 were set to 2.0 mm. Both the first main pipe 43a of the first coating liquid supply pipe 43 and the second main pipe 44a of the second coating liquid supply pipe 44 had an inner diameter of 1.59 mm and an outer diameter of 3.17 mm. The second main pipe 44 a of the second coating liquid supply pipe 44 was not provided with the pressure reducing valve 45 . Other configurations are the same as those of the first embodiment. The coating apparatus according to the comparative example was developed by the inventors of the present application.

＜測定条件＞
塗膜Ｆの膜厚を、マイクロメータ（ミツトヨ製）を用いて測定した。膜厚は、塗膜Ｆ形成後における基材２の厚み寸法Ｔから、塗膜Ｆ形成前における基材２の厚み寸法ｔを差し引いた値とした（図５参照）。膜厚平均値は、膜厚を塗工方向（搬送方向）に５ｍｍ間隔で５点測定して、その測定値より算出した。 <Measurement conditions>
The film thickness of the coating film F was measured using a micrometer (manufactured by Mitutoyo). The film thickness was obtained by subtracting the thickness t of the base material 2 before forming the coating film F from the thickness T of the base material 2 after forming the coating film F (see FIG. 5). The film thickness average value was calculated from the measured values obtained by measuring the film thickness at 5 points in the coating direction (conveyance direction) at intervals of 5 mm.

＜測定結果＞
（実施例１）
基材２の下面における膜厚平均値は０．０９ｍｍ、基材２の上面における膜厚平均値は０．１１ｍｍであり、良好な結果が得られた。 <Measurement result>
(Example 1)
The average film thickness on the lower surface of the substrate 2 was 0.09 mm, and the average film thickness on the upper surface of the substrate 2 was 0.11 mm, showing good results.

（実施例２）
基材２の下面における膜厚平均値は０．０８ｍｍ、基材２の上面における膜厚平均値は０．１２ｍｍであり、良好な結果が得られた。 (Example 2)
The average film thickness on the lower surface of the substrate 2 was 0.08 mm, and the average film thickness on the upper surface of the substrate 2 was 0.12 mm, and good results were obtained.

（実施例３）
基材２の下面における膜厚平均値は０．０８ｍｍ、基材２の上面における膜厚平均値は０．１２ｍｍであり、良好な結果が得られた。 (Example 3)
The average film thickness on the lower surface of the substrate 2 was 0.08 mm, and the average film thickness on the upper surface of the substrate 2 was 0.12 mm, and good results were obtained.

（比較例）
基材２の下面における膜厚平均値は０．０６ｍｍ、基材２の上面における膜厚平均値は０．１４ｍｍであった。 (Comparative example)
The average film thickness on the lower surface of the substrate 2 was 0.06 mm, and the average film thickness on the upper surface of the substrate 2 was 0.14 mm.

本開示は、塗工装置及び塗工方法に適用できるので、極めて有用であり、産業上の利用可能性が高い。 INDUSTRIAL APPLICABILITY The present disclosure is applicable to a coating apparatus and a coating method, and thus is extremely useful and has high industrial applicability.

Ｘ搬送方向
Ｙ幅方向
Ｚ厚み方向
Ｃ塗液
Ｆ塗膜
１塗工システム
２基材
２０塗工装置
２１第１ブロック（一対のブロック）
２２第２ブロック（一対のブロック）
２３液溜り部（隙間）
２４基材導入口
２５基材排出口
２６側面部
２６ａ第１側面部
２６ｂ第２側面部
２９露出口
３１第１塗液供給口
３２第２塗液供給口
３３第１塗液供給路
３４第２塗液供給路
４１塗液供給ポンプ（塗液供給機構）
４２塗液供給管
４３第１塗液供給管
４３ａ第１主管
４３ｂ第１分岐管
４４第２塗液供給管
４４ａ第２主管
４４ｂ第２分岐管
４５減圧バルブ
４６共通塗液供給管
４７第１塗液供給管（分岐管）
４８第２塗液供給管（分岐管） X Conveyance direction Y Width direction Z Thickness direction C Coating liquid F Coating film 1 Coating system 2 Substrate 20 Coating device 21 First block (a pair of blocks)
22 second block (a pair of blocks)
23 liquid reservoir (gap)
24 base material introduction port 25 base material discharge port 26 side portion 26a first side portion 26b second side portion 29 exposure port 31 first coating liquid supply port 32 second coating liquid supply port 33 first coating liquid supply path 34 second second side Coating liquid supply path 41 Coating liquid supply pump (coating liquid supply mechanism)
42 coating fluid supply pipe 43 first coating fluid supply pipe 43a first main pipe 43b first branch pipe 44 second coating fluid supply pipe 44a second main pipe 44b second branch pipe 45 pressure reducing valve 46 common coating fluid supply pipe 47 first coating Liquid supply pipe (branch pipe)
48 Second coating liquid supply pipe (branch pipe)

Claims

A coating device that applies a coating liquid to both sides of a conveyed sheet-like substrate,
a pair of blocks facing each other in the thickness direction of the base material;
a liquid reservoir section formed so that the coating liquid is accumulated in the gap between the pair of blocks, and through which the base material passes;
The liquid reservoir is
a base material introduction port that opens upstream in the conveying direction of the base material and into which the base material is introduced;
a base material discharge port that opens downstream in the conveying direction and discharges the base material;
side portions located on both sides in the width direction intersecting the conveying direction,
The pair of blocks are provided with a first coating liquid supply port and a second coating liquid supply port facing the liquid pool and supplying the coating liquid to the liquid pool,
The pressure of the coating liquid supplied from the first coating liquid supply port to the liquid pool is higher than the pressure of the coating liquid supplied to the liquid pool from the second coating liquid supply port. Constructed coating device.

In the coating apparatus according to claim 1,
One block of the pair of blocks is provided with the first coating liquid supply port,
The coating device, wherein the second coating liquid supply port is provided in the other block of the pair of blocks.

In the coating device according to claim 1 or 2,
One block of the pair of blocks is provided with both the first coating liquid supply port and the second coating liquid supply port,
The coating device, wherein the first coating liquid supply port and the second coating liquid supply port are spaced apart from each other in at least one of the conveying direction and the width direction.

In the coating apparatus according to any one of claims 1 to 3,
The coating device, wherein the cross-sectional area of the first coating liquid supply port is larger than the cross-sectional area of the second coating liquid supply port.

In the coating apparatus according to any one of claims 1 to 4,
Inside the pair of blocks, a first coating liquid supply path communicating with the first coating liquid supply port and a second coating liquid supply path communicating with the second coating liquid supply port are provided. ,
Outside the pair of blocks, a first coating liquid supply pipe that communicates the coating liquid supply mechanism and the first coating liquid supply path, and a coating liquid supply mechanism and the second coating liquid supply path that communicates. and a second coating liquid supply pipe.

In the coating apparatus according to claim 5,
The coating device, wherein the cross-sectional area of the first coating liquid supply path is larger than the cross-sectional area of the second coating liquid supply path.

In the coating device according to claim 5 or 6,
The coating apparatus, wherein the cross-sectional area of the first coating liquid supply pipe is larger than the cross-sectional area of the second coating liquid supply pipe.

In the coating apparatus according to any one of claims 5 to 7,
The coating apparatus, wherein the second coating liquid supply pipe is provided with a decompression valve.

In the coating apparatus according to any one of claims 1 to 8,
At least one side surface portion in the width direction is provided with an exposure port that opens from the base material introduction port to the base material discharge port,
A coating apparatus, wherein a portion of the base material in the width direction can protrude outside the liquid reservoir from the exposure opening.

In the coating apparatus according to any one of claims 1 to 9,
The conveying direction is a horizontal direction,
The lower block is provided with the first coating liquid supply port,
The coating device, wherein the upper block is provided with the second coating liquid supply port.

Using the coating apparatus according to any one of claims 1 to 10, while supplying the coating liquid from the first coating liquid supply port and the second coating liquid supply port to the liquid reservoir, A coating method in which the substrate is passed through the liquid reservoir.