JP6873015B2 - Coating equipment and coating method - Google Patents

Coating equipment and coating method Download PDF

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JP6873015B2
JP6873015B2 JP2017182723A JP2017182723A JP6873015B2 JP 6873015 B2 JP6873015 B2 JP 6873015B2 JP 2017182723 A JP2017182723 A JP 2017182723A JP 2017182723 A JP2017182723 A JP 2017182723A JP 6873015 B2 JP6873015 B2 JP 6873015B2
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coating
base material
discharge port
head
downstream
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JP2019055388A (en
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巨剛 山仲
巨剛 山仲
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Screen Holdings Co Ltd
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Screen Holdings Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
    • B05C9/14—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation involving heating or cooling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
    • B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
    • B05C11/1002—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves
    • B05C11/1015—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to a conditions of ambient medium or target, e.g. humidity, temperature ; responsive to position or movement of the coating head relative to the target
    • B05C11/1018—Means for controlling supply, i.e. flow or pressure, of liquid or other fluent material to the applying apparatus, e.g. valves responsive to a conditions of ambient medium or target, e.g. humidity, temperature ; responsive to position or movement of the coating head relative to the target responsive to distance of target
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0245—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work for applying liquid or other fluent material to a moving work of indefinite length, e.g. to a moving web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0254—Coating heads with slot-shaped outlet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/027—Coating heads with several outlets, e.g. aligned transversally to the moving direction of a web to be coated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
    • B05C5/02—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work
    • B05C5/0291—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work the liquid or other fluent material being discharged through an outlet orifice by pressure, e.g. from an outlet device in contact or almost in contact, with the work the material being discharged on the work through discrete orifices as discrete droplets, beads or strips that coalesce on the work or are spread on the work so as to form a continuous coating

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  • Coating Apparatus (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Description

本発明は、基材に向けて塗工液を間欠的に塗工する塗工技術に関する。 The present invention relates to a coating technique for intermittently coating a coating liquid on a base material.

このような間欠塗工を行う装置として、特許文献１には、連続的に供給される媒体の供給方向に前後して２つの塗布手段をコーティングヘッドのダイに設け、各塗布手段の各スリットより塗布液を独立して吐出する塗工装置が開示されている。当該装置は、各塗布手段を交互に起動させ、上流側の塗布手段で塗布パターンを形成後、下流側の塗布手段で塗布パターンを形成するようにして媒体上に間欠的に塗布液を塗布する。これにより、当該装置は、各塗布手段の作動間隔を大きくして、塗布パターン同士の間隔が小さい場合でも、間欠塗布の処理速度を向上することを図っている。 As an apparatus for performing such intermittent coating, Patent Document 1 provides two coating means on the die of the coating head before and after the supply direction of the continuously supplied medium, and from each slit of each coating means. A coating device that independently discharges a coating liquid is disclosed. The device alternately activates each coating means, forms a coating pattern with the upstream coating means, and then intermittently coats the coating liquid on the medium by forming the coating pattern with the downstream coating means. .. As a result, the apparatus aims to increase the operating interval of each coating means to improve the processing speed of intermittent coating even when the spacing between coating patterns is small.

特開平１０−４３６５９号公報Japanese Unexamined Patent Publication No. 10-43659

しかしながら、特許文献１の塗工装置では、２つの吐出手段のスリット先端の各吐出口と、基材との間隔は同じであるため、上流側の塗布手段が塗布した塗布パターンに下流側の塗布手段が接触して当該塗布パターンを損傷するといった問題がある。 However, in the coating apparatus of Patent Document 1, since the distance between each discharge port at the slit tip of the two discharge means and the base material is the same, the coating pattern applied by the coating means on the upstream side is coated on the downstream side. There is a problem that the means come into contact with each other and damage the coating pattern.

本発明は、こうした問題を解決するためになされたもので、基材上に塗工液を間欠的に塗工して塗工膜を形成する際に、塗工膜の損傷を防止することができる技術を提供することを目的とする。 The present invention has been made to solve such a problem, and it is possible to prevent damage to the coating film when the coating liquid is intermittently applied on the base material to form the coating film. The purpose is to provide the technology that can be used.

上記の課題を解決するために、第１の態様に係る塗工装置は、長尺帯状の基材に対して間欠塗工する塗工装置であって、前記基材を長手方向に搬送する搬送部と、前記基材の一方面側に配置され、前記一方面に沿って前記長手方向に直交する方向に延びて前記一方面に対向するスリット状の第１吐出口を有する第１塗工ヘッドと、前記第１塗工ヘッドよりも前記搬送部による前記基材の搬送方向の下流側において前記一方面側に配置され、前記一方面に沿って前記長手方向に直交する方向に延びて前記一方面に対向するスリット状の第２吐出口を有する第２塗工ヘッドと、前記第１塗工ヘッドと前記第２塗工ヘッドとのそれぞれに対して塗工液を間欠的に供給することにより、前記第１塗工ヘッドと前記第２塗工ヘッドとのそれぞれから前記基材の前記一方面に向けて間欠的に前記塗工液を吐出させる塗工液供給機構と、前記第１塗工ヘッドにより前記基材の前記一方面上に間欠的に形成される複数の塗工膜のうち互いに隣り合う塗工膜に挟まれた前記一方面上の複数の領域のそれぞれに、第２塗工ヘッドにより塗工膜を形成するように、前記塗工液供給機構を制御する制御部と、を備え、前記第１塗工ヘッドの前記第１吐出口と、前記一方面のうち前記第１吐出口が対向する第１部分との間隔よりも、第２塗工ヘッドの第２吐出口と、前記一方面のうち前記第２吐出口が対向する第２部分との間隔が長い。 In order to solve the above problems, the coating device according to the first aspect is a coating device that intermittently coats a long strip-shaped base material, and transports the base material in the longitudinal direction. A first coating head which is arranged on one surface side of the base material and has a slit-shaped first discharge port which extends in a direction orthogonal to the longitudinal direction along the one surface and faces the one surface. And, it is arranged on the one side of the first coating head on the downstream side in the transport direction of the base material by the transport portion, and extends along the one surface in a direction orthogonal to the longitudinal direction. By intermittently supplying the coating liquid to each of the second coating head having a slit-shaped second discharge port facing the direction, the first coating head, and the second coating head. A coating liquid supply mechanism that intermittently discharges the coating liquid from each of the first coating head and the second coating head toward the one surface of the base material, and the first coating. A second coating is applied to each of the plurality of regions on the one surface sandwiched between the coating films adjacent to each other among the plurality of coating films intermittently formed on the one surface of the base material by the head. A control unit that controls the coating liquid supply mechanism so as to form a coating film by the head is provided, and the first discharge port of the first coating head and the first discharge of the one surface are provided. The distance between the second discharge port of the second coating head and the second portion of the one surface on which the second discharge port faces is longer than the distance between the first portion facing the outlet.

第２の態様に係る塗工装置は、第１の態様に係る塗工装置であって、前記第２塗工ヘッドは、その前記第２吐出口を規定する前記搬送方向の上流側先端部と下流側先端部とを含み、前記上流側先端部と前記基材の前記一方面の前記第２部分との間隔と、前記下流側先端部と前記第２部分との間隔とが異なる。 The coating device according to the second aspect is the coating device according to the first aspect, and the second coating head is a tip portion on the upstream side in the transport direction that defines the second discharge port. The distance between the upstream end portion and the second portion of the one surface of the base material, including the downstream tip portion, and the distance between the downstream tip portion and the second portion are different.

第３の態様に係る塗工装置は、第２の態様に係る塗工装置であって、前記第２塗工ヘッドの前記上流側先端部が前記下流側先端部よりも前記基材の前記一方面に近い。 The coating device according to the third aspect is the coating device according to the second aspect, in which the upstream tip portion of the second coating head is more than the downstream tip portion of the base material. Close to the direction.

第４の態様に係る塗工装置は、第２の態様に係る塗工装置であって、前記第２塗工ヘッドの前記下流側先端部が前記上流側先端部よりも前記基材の前記一方面に近い。 The coating device according to the fourth aspect is the coating device according to the second aspect, in which the downstream tip portion of the second coating head is more than the upstream tip portion of the base material. Close to the direction.

第５の態様に係る塗工方法は、長尺帯状の基材に対して間欠塗工する塗工方法であって、前記基材を長手方向に搬送する搬送工程と、前記基材の一方面側に配置され、前記一方面に沿って前記長手方向に直交する方向に延びて前記一方面に対向するスリット状の第１吐出口を有する第１塗工ヘッドと、前記第１塗工ヘッドよりも前記搬送工程における前記基材の搬送方向の下流側において前記一方面側に配置され、前記一方面に沿って前記長手方向に直交する方向に延びて前記一方面に対向するスリット状の第２吐出口を有する第２塗工ヘッドとのそれぞれから前記基材の前記一方面に向けて、前記搬送工程と並行して間欠的に塗工液を吐出する塗工液吐出工程と、を備え、前記塗工液吐出工程は、前記第１塗工ヘッドにより前記基材の前記一方面上に間欠的に形成される複数の塗工膜のうち互いに隣り合う塗工膜に挟まれた前記一方面上の複数の領域のそれぞれに、第２塗工ヘッドにより塗工膜を形成するように、前記第１塗工ヘッドと前記第２塗工ヘッドとのそれぞれから前記塗工液を吐出する工程であり、前記第１塗工ヘッドの前記第１吐出口と、前記一方面のうち前記第１吐出口が対向する第１部分との間隔よりも、第２塗工ヘッドの第２吐出口と、前記一方面のうち前記第２吐出口が対向する第２部分との間隔が長い。 The coating method according to the fifth aspect is a coating method in which a long strip-shaped base material is intermittently coated, and is a transport step of transporting the base material in the longitudinal direction and one surface of the base material. From the first coating head arranged on the side and having a slit-shaped first discharge port extending in a direction orthogonal to the longitudinal direction along the one surface and facing the one surface, and the first coating head. Is also arranged on the one side on the downstream side in the transport direction of the base material in the transport step, and extends along the one surface in a direction orthogonal to the longitudinal direction and faces the one surface. A coating liquid discharge step of intermittently discharging the coating liquid in parallel with the transfer step from each of the second coating head having a discharge port toward the one surface of the base material is provided. In the coating liquid discharge step, the one surface sandwiched between the coating films adjacent to each other among a plurality of coating films intermittently formed on the one surface of the base material by the first coating head. In the step of discharging the coating liquid from each of the first coating head and the second coating head so that the coating film is formed by the second coating head in each of the above plurality of regions. Yes, the second discharge port of the second coating head and the second discharge port of the second coating head are more than the distance between the first discharge port of the first coating head and the first portion of the one surface on which the first discharge port faces. The distance between the one surface and the second portion facing the second discharge port is long.

第６の態様に係る塗工方法は、第５の態様に係る塗工方法であって、前記第２塗工ヘッドは、その前記第２吐出口を規定する前記搬送方向の上流側先端部と下流側先端部とを含み、前記上流側先端部と前記基材の前記一方面の前記第２部分との間隔と、前記下流側先端部と前記第２部分との間隔とが異なる。 The coating method according to the sixth aspect is the coating method according to the fifth aspect, and the second coating head is a tip portion on the upstream side in the transport direction that defines the second discharge port. The distance between the upstream end portion and the second portion of the one surface of the base material, including the downstream tip portion, and the distance between the downstream end portion and the second portion are different.

第７の態様に係る塗工方法は、第６の態様に係る塗工方法であって、前記第２塗工ヘッドの前記上流側先端部が前記下流側先端部よりも前記基材の前記一方面に近い。 The coating method according to the seventh aspect is the coating method according to the sixth aspect, wherein the upstream end portion of the second coating head is more than the downstream end portion of the base material. Close to the direction.

第８の態様に係る塗工方法は、第６の態様に係る塗工方法であって、前記第２塗工ヘッドの前記下流側先端部が前記上流側先端部よりも前記基材の前記一方面に近い。 The coating method according to the eighth aspect is the coating method according to the sixth aspect, wherein the downstream tip portion of the second coating head is the one of the base material rather than the upstream tip portion. Close to the direction.

第９の態様に係る塗工方法は、第５の態様に係る塗工方法であって、前記第２塗工ヘッドは、その前記第２吐出口を規定する前記搬送方向の上流側先端部と下流側先端部とを含み、当該塗工方法は、前記第２塗工ヘッドの前記上流側先端部と前記基材の前記一方面の前記第２部分との第１間隔と、前記第２塗工ヘッドの前記下流側先端部と前記第２部分との第２間隔との大小関係が前記塗工液の粘度に適した関係となるように、前記上流側先端部と前記下流側先端部との位置関係を、前記塗工液吐出工程に先立って設定する先端部設定工程、をさらに備える。 The coating method according to the ninth aspect is the coating method according to the fifth aspect, and the second coating head is a tip portion on the upstream side in the transport direction that defines the second discharge port. The coating method includes a downstream tip portion, and the coating method includes a first distance between the upstream tip portion of the second coating head and the second portion of the one surface of the base material, and the second coating. The upstream tip and the downstream tip are arranged so that the magnitude relationship between the downstream tip of the work head and the second interval between the second portion is suitable for the viscosity of the coating liquid. Further includes a tip setting step of setting the positional relationship of the above prior to the coating liquid discharge step.

第１０の態様に係る塗工方法は、第９の態様に係る塗工方法であって、前記先端部設定工程は、前記塗工液の粘度が所定の基準値よりも低い場合には、前記上流側先端部に係る前記第１間隔が、前記下流側先端部に係る前記第２間隔よりも広くなるように前記上流側先端部と前記下流側先端部との位置関係を設定し、前記塗工液の粘度が前記基準値よりも高い場合には、前記第１間隔が前記第２間隔よりも広くなるように当該位置関係を設定する工程である。 The coating method according to the tenth aspect is the coating method according to the ninth aspect, and the tip setting step is described when the viscosity of the coating liquid is lower than a predetermined reference value. The positional relationship between the upstream tip and the downstream tip is set so that the first spacing related to the upstream tip is wider than the second spacing related to the downstream tip, and the coating is applied. When the viscosity of the working liquid is higher than the reference value, it is a step of setting the positional relationship so that the first interval is wider than the second interval.

第１の態様に係る発明によれば、第１塗工ヘッドの第１吐出口と、基材の一方面のうち第１吐出口が対向する第１部分との間隔よりも、第２塗工ヘッドの第２吐出口と、当該一方面のうち第２吐出口が対向する第２部分との間隔が長い。従って、第１塗工ヘッドにより基材の一方面上に間欠的に形成される複数の塗工膜のうち互いに隣り合う塗工膜に挟まれた一方面上の複数の領域のそれぞれに、第２塗工ヘッドにより塗工膜を形成する際に、第１塗工ヘッドによって形成された塗工膜に第２塗工ヘッドが接触することを防止することができる。従って、当該塗工装置が基材上に塗工液を間欠的に塗工して塗工膜を形成する際に、塗工膜の損傷を防止することができる。 According to the invention according to the first aspect, the second coating is performed rather than the distance between the first discharge port of the first coating head and the first portion of one surface of the base material on which the first discharge port faces. The distance between the second discharge port of the head and the second portion of the one surface on which the second discharge port faces is long. Therefore, among the plurality of coating films intermittently formed on one surface of the base material by the first coating head, each of the plurality of regions on one surface sandwiched between the coating films adjacent to each other is the first. When the coating film is formed by the two coating heads, it is possible to prevent the second coating head from coming into contact with the coating film formed by the first coating head. Therefore, when the coating apparatus intermittently coats the coating liquid on the base material to form the coating film, damage to the coating film can be prevented.

第２の態様に係る発明によれば、第２塗工ヘッドの上流側先端部と基材との間隔と、第２塗工ヘッドの下流側先端部と基材との間隔とが異なる。従って、第２塗工ヘッドの両先端部と基材との間に形成される塗工液の液溜まりを大きくすることができる。これにより、塗工液に空気が巻き込まれて塗工膜に気泡が混入することを抑制しつつ、第２塗工ヘッドと基材との間隔をより広くして第２塗工ヘッドによる塗工膜の損傷をより確実に防止することができる。 According to the invention according to the second aspect, the distance between the upstream tip of the second coating head and the base material is different from the distance between the downstream tip of the second coating head and the base material. Therefore, it is possible to increase the amount of the coating liquid formed between both tips of the second coating head and the base material. As a result, while suppressing air from being entrained in the coating liquid and air bubbles from being mixed into the coating film, the distance between the second coating head and the base material is widened and coating by the second coating head is performed. Damage to the membrane can be prevented more reliably.

第３の態様に係る発明によれば、第２塗工ヘッドの上流側先端部が下流側先端部よりも基材の一方面に近いので、塗工液の粘度が低い場合に、第２塗工ヘッドの両先端部と基材との間に形成される塗工液の液溜まりを大きくすることができる。 According to the invention according to the third aspect, since the upstream tip portion of the second coating head is closer to one surface of the base material than the downstream tip portion, the second coating is performed when the viscosity of the coating liquid is low. It is possible to increase the amount of the coating liquid formed between both tips of the work head and the base material.

第４の態様に係る発明によれば、第２塗工ヘッドの下流側先端部が上流側先端部よりも基材の一方面に近いので、塗工液の粘度が高い場合に、第２塗工ヘッドの両先端部と基材との間に形成される塗工液の液溜まりを大きくすることができる。 According to the invention according to the fourth aspect, since the downstream tip portion of the second coating head is closer to one surface of the base material than the upstream tip portion, the second coating is performed when the viscosity of the coating liquid is high. It is possible to increase the amount of the coating liquid formed between both tips of the work head and the base material.

第５の態様に係る発明によれば、第１塗工ヘッドの第１吐出口と、基材の一方面のうち第１吐出口が対向する第１部分との間隔よりも、第２塗工ヘッドの第２吐出口と、当該一方面のうち第２吐出口が対向する第２部分との間隔が長い。従って、第１塗工ヘッドにより基材の一方面上に間欠的に形成される複数の塗工膜のうち互いに隣り合う塗工膜に挟まれた一方面上の複数の領域のそれぞれに、第２塗工ヘッドにより塗工膜を形成する際に、第１塗工ヘッドによって形成された塗工膜に第２塗工ヘッドが接触することを防止することができる。従って、当該塗工方法によって基材上に塗工液を間欠的に塗工して塗工膜を形成する際に、塗工膜の損傷を防止することができる。 According to the invention according to the fifth aspect, the second coating is performed rather than the distance between the first discharge port of the first coating head and the first portion of one surface of the base material on which the first discharge port faces. The distance between the second discharge port of the head and the second portion of the one surface on which the second discharge port faces is long. Therefore, among the plurality of coating films intermittently formed on one surface of the base material by the first coating head, each of the plurality of regions on one surface sandwiched between the coating films adjacent to each other is the first. When the coating film is formed by the two coating heads, it is possible to prevent the second coating head from coming into contact with the coating film formed by the first coating head. Therefore, it is possible to prevent damage to the coating film when the coating liquid is intermittently applied onto the base material to form the coating film by the coating method.

第９の態様に係る発明によれば、第２塗工ヘッドの上流側先端部と基材との第１間隔と、第２塗工ヘッドの下流側先端部と基材との第２間隔との大小関係が塗工液の粘度に適した関係となるように、上流側先端部と下流側先端部との位置関係が、塗工液吐出工程に先立って先端部設定工程において設定される。従って、上流側先端部と下流側先端部との位置関係が塗工液の粘度に適している第２塗工ヘッドを、塗工液吐出工程において用いることができるので、第２塗工ヘッドの両先端部と基材との間に形成される塗工液の液溜まりを大きくすることができる。これにより、塗工液に空気が巻き込まれて塗工膜に気泡が混入することを抑制しつつ、第２塗工ヘッドと基材との間隔をより広くして第２塗工ヘッドによる塗工膜の損傷をより確実に防止することができる。 According to the invention according to the ninth aspect, the first distance between the upstream tip of the second coating head and the base material, and the second distance between the downstream tip of the second coating head and the base material. The positional relationship between the upstream tip and the downstream tip is set in the tip setting step prior to the coating liquid discharge step so that the magnitude relationship of the above is suitable for the viscosity of the coating liquid. Therefore, since the second coating head whose positional relationship between the upstream tip and the downstream tip is suitable for the viscosity of the coating liquid can be used in the coating liquid discharge process, the second coating head can be used. It is possible to increase the amount of the coating liquid formed between both tips and the base material. As a result, while suppressing air from being entrained in the coating liquid and air bubbles from being mixed into the coating film, the distance between the second coating head and the base material is widened and coating by the second coating head is performed. Damage to the membrane can be prevented more reliably.

第１０の態様に係る発明によれば、先端部設定工程は、塗工液の粘度が所定の基準値よりも低い場合には、上流側先端部に係る第１間隔が、下流側先端部に係る第２間隔よりも広くなるように上流側先端部と下流側先端部との位置関係を設定し、塗工液の粘度が基準値よりも高い場合には、第１間隔が第２間隔よりも広くなるように当該位置関係を設定する工程である。従って、塗工液の粘度が基準値よりも高い場合と低い場合との何れにおいても、第２塗工ヘッドと基材との間に形成される塗工液の液溜まりが大きくなる第２塗工ヘッドを用いて塗工液吐出工程を行うことができる。 According to the invention according to the tenth aspect, in the tip setting step, when the viscosity of the coating liquid is lower than a predetermined reference value, the first interval related to the upstream tip is set to the downstream tip. The positional relationship between the upstream tip and the downstream tip is set so as to be wider than the second interval, and when the viscosity of the coating liquid is higher than the reference value, the first interval is greater than the second interval. Is a process of setting the positional relationship so as to be wider. Therefore, regardless of whether the viscosity of the coating liquid is higher or lower than the reference value, the second coating in which the liquid pool of the coating liquid formed between the second coating head and the base material becomes large. The coating liquid discharge process can be performed using the work head.

本発明の実施形態に係る塗工装置を組み込んだ塗工膜形成システムの全体構成を示す図である。It is a figure which shows the whole structure of the coating film forming system which incorporated the coating apparatus which concerns on embodiment of this invention. 図１の塗工装置の概略構成を示す図である。It is a figure which shows the schematic structure of the coating apparatus of FIG. 図１の塗工装置により塗工膜が形成された基材を模式的に示す平面図である。It is a top view which shows typically the base material on which the coating film was formed by the coating apparatus of FIG. 塗工ヘッドと基材との距離と、塗工ヘッドと基材との間に形成される液溜まりとの関係を説明するための図である。It is a figure for demonstrating the relationship between the distance between a coating head and a base material, and the liquid pool formed between a coating head and a base material. 塗工ヘッドと基材との距離が遠く、塗工液に空気が巻き込まれる状態を示す模式図である。It is a schematic diagram which shows the state which the distance between a coating head and a base material is long, and air is entrained in a coating liquid. 図５の塗工液によって塗工膜が形成された基材を例示する平面模式図である。FIG. 5 is a schematic plan view illustrating a base material on which a coating film is formed by the coating liquid of FIG. 図５の塗工液によって塗工膜が形成された基材を例示する平面模式図である。FIG. 5 is a schematic plan view illustrating a base material on which a coating film is formed by the coating liquid of FIG. 図１の塗工装置の塗工ヘッドの構成例を説明するための断面模式図である。It is sectional drawing for explaining the structural example of the coating head of the coating apparatus of FIG. 図１の塗工装置の塗工ヘッドの構成例を説明するための断面模式図である。It is sectional drawing for explaining the structural example of the coating head of the coating apparatus of FIG. 図１の塗工装置の塗工ヘッドの構成例を説明するための断面模式図である。It is sectional drawing for explaining the structural example of the coating head of the coating apparatus of FIG. 図１の塗工装置の塗工ヘッドの先端部の調整を説明するための図である。It is a figure for demonstrating the adjustment of the tip part of the coating head of the coating apparatus of FIG. 図１の塗工膜形成システムの動作の一例を示すフローチャートである。It is a flowchart which shows an example of the operation of the coating film formation system of FIG. 塗工ヘッドの先端部の調整手順の一例を示すフローチャートである。It is a flowchart which shows an example of the adjustment procedure of the tip part of a coating head. 本発明の実施形態に係る塗工装置を組み込んだ塗工膜形成システムの全体構成の他の例を示す図である。It is a figure which shows another example of the whole structure of the coating film forming system which incorporated the coating apparatus which concerns on embodiment of this invention.

以下、図面を参照しつつ本発明の実施の形態について詳細に説明する。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

＜１．塗工膜形成システムの全体構成＞
図１は、本発明に係る塗工装置を組み込んだ塗工膜形成システム１の全体構成を示す図である。なお、図１および以降の各図においては、理解容易のため、必要に応じて各部の寸法や数を誇張または簡略化して描いている。 <1. Overall configuration of coating film formation system>
FIG. 1 is a diagram showing an overall configuration of a coating film forming system 1 incorporating the coating apparatus according to the present invention. In addition, in FIG. 1 and each subsequent drawing, the dimensions and numbers of each part are exaggerated or simplified as necessary for easy understanding.

この塗工膜形成システム１は、基材としての金属箔の上に電極材料である活物質を含む塗工液６を塗工し、その塗工液６の乾燥処理を行ってリチウムイオン二次電池の電極製造を行う装置である。塗工膜形成システム１は、塗工装置１０、乾燥部１５０および搬送機構８０を備える。また、塗工膜形成システム１は、システム全体を管理する制御部９０を備える。 In this coating film forming system 1, a coating liquid 6 containing an active material as an electrode material is coated on a metal foil as a base material, and the coating liquid 6 is dried to perform lithium ion secondary. It is a device that manufactures electrodes for batteries. The coating film forming system 1 includes a coating device 10, a drying portion 150, and a transport mechanism 80. Further, the coating film forming system 1 includes a control unit 90 that manages the entire system.

基材５は、リチウムイオン二次電池の集電体として機能する金属箔である。塗工膜形成システム１にてリチウムイオン二次電池の正極を製造する場合には、基材５として例えばアルミニウム箔（Ａｌ）を用いることができる。また、塗工膜形成システム１にて負極を製造する場合には、基材５として例えば銅箔（Ｃｕ）を用いることができる。基材５は長尺のシート状の金属箔、すなわち長尺帯状の部材であり、その幅および厚さについては特に限定されるものではないが、例えば幅６００ｍｍ〜７００ｍｍ、厚さ１０μｍ〜２０μｍとすることができる。 The base material 5 is a metal foil that functions as a current collector for a lithium ion secondary battery. When the positive electrode of the lithium ion secondary battery is manufactured by the coating film forming system 1, for example, an aluminum foil (Al) can be used as the base material 5. Further, when the negative electrode is manufactured by the coating film forming system 1, for example, copper foil (Cu) can be used as the base material 5. The base material 5 is a long sheet-shaped metal foil, that is, a long strip-shaped member, and the width and thickness thereof are not particularly limited, but are, for example, 600 mm to 700 mm in width and 10 μm to 20 μm in thickness. can do.

長尺の基材５は、巻き出しローラ８１から送り出されて巻き取りローラ８２によって巻き取られることにより、塗工装置１０、乾燥部１５０の順に搬送される。搬送機構８０は、これら巻き出しローラ８１および巻き取りローラ８２と複数の補助ローラ８３とを備えて構成される。搬送機構８０は、基材５の長手方向に沿う所定の搬送経路に沿って基材５を搬送する。すなわち、搬送機構８０は、基材５をその長手方向に搬送する。なお、補助ローラ８３の個数および配置位置については、図１の例に限定されるものではなく、必要に応じて適宜に増減することができる。 The long base material 5 is sent out from the unwinding roller 81 and wound up by the winding roller 82, so that the coating device 10 and the drying portion 150 are conveyed in this order. The transport mechanism 80 includes the unwinding roller 81, the winding roller 82, and a plurality of auxiliary rollers 83. The transport mechanism 80 transports the base material 5 along a predetermined transport path along the longitudinal direction of the base material 5. That is, the transport mechanism 80 transports the base material 5 in the longitudinal direction thereof. The number and arrangement positions of the auxiliary rollers 83 are not limited to the example of FIG. 1, and can be appropriately increased or decreased as necessary.

乾燥部１５０は、塗工装置１０にて基材５の上に形成された塗工液６の塗工膜（「塗膜」とも称する）７の乾燥処理を行う。乾燥部１５０は、搬送機構８０によって搬送される基材５を加熱することによって、塗工液６から溶剤を蒸発させて乾燥処理を行う。乾燥部１５０は、例えば、塗工液６の塗工膜７を緩やかに昇温させる予熱部、塗工膜７を所定温度にまで昇温して主たる加熱を行うメイン乾燥部、塗工膜７をより高温に加熱して膜中の歪みや残留応力を除去するアニール部、加熱された塗工膜７を冷却する冷却部などを備えていても良い。 The drying unit 150 dries the coating film (also referred to as “coating film”) 7 of the coating liquid 6 formed on the base material 5 by the coating device 10. The drying unit 150 heats the base material 5 transported by the transport mechanism 80 to evaporate the solvent from the coating liquid 6 and perform a drying process. The drying portion 150 is, for example, a preheating portion that slowly raises the temperature of the coating film 7 of the coating liquid 6, a main drying portion that raises the coating film 7 to a predetermined temperature and mainly heats the coating film 7, and the coating film 7. It may be provided with an annealing part for removing strain and residual stress in the film by heating the film to a higher temperature, a cooling part for cooling the heated coating film 7.

なお、本明細書では、塗工ノズル１１と塗工ノズル１２とがそれぞれ塗工液６を基材５に向けて吐出するが、塗工ノズル１１、塗工ノズル１２が塗工液６を吐出して基材５に形成する塗工膜の総称として「塗工膜７」と記載する場合がある。また、塗工ノズル１１が形成する塗工膜と、塗工ノズル１２が形成する塗工膜とを区別する場合には、塗工ノズル１１が形成する塗工膜を「塗工膜７１」と記載し、塗工ノズル１２が形成する塗工膜を「塗工膜７２」と記載する場合がある。 In this specification, the coating nozzle 11 and the coating nozzle 12 discharge the coating liquid 6 toward the base material 5, respectively, but the coating nozzle 11 and the coating nozzle 12 discharge the coating liquid 6. As a general term for the coating film formed on the base material 5, "coating film 7" may be described. Further, when distinguishing between the coating film formed by the coating nozzle 11 and the coating film formed by the coating nozzle 12, the coating film formed by the coating nozzle 11 is referred to as "coating film 71". The coating film formed by the coating nozzle 12 may be described as "coating film 72".

＜２．塗工装置＞
図２は、本発明に係る塗工装置１０の概略構成を示す図である。図３は、塗工装置１０により塗工膜７が形成された基材５を模式的に示す平面図である。 <2. Coating equipment>
FIG. 2 is a diagram showing a schematic configuration of a coating device 10 according to the present invention. FIG. 3 is a plan view schematically showing the base material 5 on which the coating film 7 is formed by the coating apparatus 10.

塗工装置１０は、主たる要素として塗工ノズル（「第１塗工ヘッド」）１１、塗工ノズル（「第２塗工ヘッド」）１２、と塗工液供給機構３とを備える。塗工液供給機構３は、貯留タンク２０、供給配管３０、３７、３８および循環配管４０を備える。塗工液供給機構３は、塗工ノズル１１と塗工ノズル１２とのそれぞれに対して塗工液６を間欠的に供給することにより、塗工ノズル１１と塗工ノズル１２とのそれぞれから基材５の一方面５ａに向けて間欠的に塗工液６を吐出させる。 The coating device 10 includes a coating nozzle (“first coating head”) 11, a coating nozzle (“second coating head”) 12, and a coating liquid supply mechanism 3 as main elements. The coating liquid supply mechanism 3 includes a storage tank 20, supply pipes 30, 37, 38, and a circulation pipe 40. The coating liquid supply mechanism 3 intermittently supplies the coating liquid 6 to each of the coating nozzle 11 and the coating nozzle 12, so that the coating liquid 6 is based on each of the coating nozzle 11 and the coating nozzle 12. The coating liquid 6 is intermittently discharged toward one surface 5a of the material 5.

塗工装置１０は、基材５に対して塗工液６を間欠的に塗工することによって、塗工液６の間欠塗工を行う。貯留タンク２０は、リチウムイオン二次電池の電極材料である活物質の溶液を塗工液６として貯留する。塗工膜形成システム１にて正極を製造する場合には、正極材料の塗工液６として、例えば正極活物質であるコバルト酸リチウム（ＬｉＣｏＯ２）、導電助剤であるカーボン（Ｃ）、結着剤であるポリフッ化ビニリデン（ＰＶＤＦ）、溶剤であるＮ−メチル−２−ピロリドン（ＮＭＰ）の混合液を貯留する。コバルト酸リチウムに代えて、正極活物質としてニッケル酸リチウム（ＬｉＮｉＯ２）、マンガン酸リチウム（ＬｉＭｎ２Ｏ４）、燐酸鉄リチウム（ＬｉＦｅＰＯ４）などを用いることもできる。 The coating apparatus 10 intermittently applies the coating liquid 6 to the base material 5 to perform the intermittent coating of the coating liquid 6. The storage tank 20 stores a solution of an active material, which is an electrode material of a lithium ion secondary battery, as a coating liquid 6. When the positive electrode is manufactured by the coating film forming system 1, the coating liquid 6 of the positive electrode material is, for example, lithium cobalt oxide (LiCoO 2 ) which is a positive electrode active material, carbon (C) which is a conductive auxiliary agent, and the like. A mixed solution of polyvinylidene fluoride (PVDF) as a coating agent and N-methyl-2-pyrrolidone (NMP) as a solvent is stored. Instead of lithium cobalt oxide, lithium nickel oxide (LiNiO 2 ), lithium manganate (LiMn 2 O 4 ), lithium iron phosphate (LiFePO 4 ), or the like can also be used as the positive electrode active material.

一方、塗工膜形成システム１にて負極を製造する場合には、負極材料の塗工液６として、例えば負極活物質である黒鉛（グラファイト）、結着剤であるＰＶＤＦ、溶剤であるＮＭＰの混合液を貯留タンク２０に貯留する。黒鉛に代えて、負極活物質としてハードカーボン、チタン酸リチウム（Ｌｉ４Ｔｉ５Ｏ１２）、シリコン合金、スズ合金などを用いることもできる。また、正極材料および負極材料の双方において、結着剤としてＰＶＤＦに代えてスチレン−ブタジエンゴム（ＳＢＲ）などを使用することができ、溶剤としてＮＭＰに代えて水（Ｈ２Ｏ）などを使用することができる。さらに、結着剤としてＳＢＲ、溶剤として水を用いる場合には、増粘剤としてカルボキシメチルセルロース（ＣＭＣ）を併用することもできる。これら正極材料および負極材料の塗工液６は固体（微粒子）が分散されたスラリーであってその粘度はいずれも１Ｐａ・ｓ（パスカル秒）以上であり、一般的にチクソトロピー性を有する。 On the other hand, when the negative electrode is manufactured by the coating film forming system 1, the coating liquid 6 of the negative electrode material is, for example, graphite (graphite) which is a negative electrode active material, PVDF which is a binder, and NMP which is a solvent. The mixed solution is stored in the storage tank 20. Instead of graphite, hard carbon, lithium titanate (Li 4 Ti 5 O 12 ), silicon alloy, tin alloy and the like can be used as the negative electrode active material. Further, in both of the positive electrode material and negative electrode material, instead of PVDF as a binder a styrene - can be used such as butadiene rubber (SBR), to use such as water (H 2 O) in place of NMP as a solvent be able to. Further, when SBR is used as the binder and water is used as the solvent, carboxymethyl cellulose (CMC) can be used in combination as the thickener. The coating liquid 6 of the positive electrode material and the negative electrode material is a slurry in which solids (fine particles) are dispersed, and the viscosity thereof is 1 Pa · s (pascal seconds) or more, and generally has thixotropic property.

貯留タンク２０には、攪拌機およびエア加圧ユニットなどが付設されていても良い。攪拌機は、貯留タンク２０に貯留されている塗工液６を攪拌して濃度分布を均一にする。エア加圧ユニットは、高圧の空気を貯留タンク２０内の気相部分に送り込んで貯留されている塗工液６の液面を加圧する。 The storage tank 20 may be provided with a stirrer, an air pressurizing unit, or the like. The stirrer stirs the coating liquid 6 stored in the storage tank 20 to make the concentration distribution uniform. The air pressurizing unit sends high-pressure air to the gas phase portion in the storage tank 20 to pressurize the liquid level of the stored coating liquid 6.

塗工液供給機構３は、供給バルブ３２、３４をさらに備える。貯留タンク２０と塗工ノズル１１とは供給配管３０、３７によって連通接続されている。貯留タンク２０と塗工ノズル１２とは供給配管３０、３８によって連通接続されている。供給配管３０は、経路途中で供給バルブ３２、３４に接続する２つの配管に分岐しており、貯留タンク２０に貯留されている塗工液６を供給バルブ３２、３４に向けて供給する。供給配管３７は、供給バルブ３２からの塗工液６を塗工ノズル１１に向けて供給し、供給配管３８は、供給バルブ３４からの塗工液６を塗工ノズル１２に向けて供給する。供給配管３０、３７、３８としては、ステンレス管または樹脂管（フレキシブル配管を含む、以下同様）を用いることができる。供給配管３０の経路途中にはポンプ３１が介挿され、供給配管３７の経路途中にはフィルタ３３が介挿されている。また、供給配管３０の経路途中から分岐して循環配管４０が設けられている。循環配管４０の基端側は、ポンプ３１よりも下流側（塗工ノズル１１に近い側）でフィルタ３３よりも上流側の位置で供給配管３０に接続され、先端側は貯留タンク２０に接続されている。 The coating liquid supply mechanism 3 further includes supply valves 32 and 34. The storage tank 20 and the coating nozzle 11 are communicated with each other by the supply pipes 30 and 37. The storage tank 20 and the coating nozzle 12 are communicated with each other by the supply pipes 30 and 38. The supply pipe 30 is branched into two pipes connected to the supply valves 32 and 34 in the middle of the route, and supplies the coating liquid 6 stored in the storage tank 20 toward the supply valves 32 and 34. The supply pipe 37 supplies the coating liquid 6 from the supply valve 32 toward the coating nozzle 11, and the supply pipe 38 supplies the coating liquid 6 from the supply valve 34 toward the coating nozzle 12. As the supply pipes 30, 37, 38, stainless steel pipes or resin pipes (including flexible pipes, the same applies hereinafter) can be used. A pump 31 is inserted in the middle of the path of the supply pipe 30, and a filter 33 is inserted in the middle of the path of the supply pipe 37. Further, the circulation pipe 40 is provided by branching from the middle of the route of the supply pipe 30. The base end side of the circulation pipe 40 is connected to the supply pipe 30 at a position downstream of the pump 31 (closer to the coating nozzle 11) and upstream of the filter 33, and the tip side is connected to the storage tank 20. ing.

ポンプ３１は、循環配管４０の接続部位よりも上流側（貯留タンク２０に近い側）に設けられており、制御部９０によって制御されて、貯留タンク２０に貯留されている電極材料の塗工液６を供給配管３０に圧送する。供給バルブ３２、３４は、制御部９０によって制御されて、供給配管３７の分岐した各流路を繰り返し開閉する。これにより、塗工ノズル１１、１２への塗工液６の供給／停止が繰り返し切り替えられる。具体的には、供給バルブ３２は、供給配管３７の開閉を繰り返し切り替えることで、塗工ノズル１１から基材５の一方面５ａに向けて塗工液６を間欠的に吐出させる。供給バルブ３４は、供給配管３８の開閉を繰り返し切り替えることで、塗工ノズル１２から基材５の一方面５ａに向けて塗工液６を間欠的に吐出させる。フィルタ３３は、供給配管３７が供給バルブ３２、３４に向かって分岐する部位と、供給配管３７と循環配管４０との接続部位との間の部分において供給配管３７の経路に介挿され、供給配管３７を塗工ノズル１１、１２に向けて流れる塗工液６から異物を取り除く。 The pump 31 is provided on the upstream side (closer to the storage tank 20) of the connection portion of the circulation pipe 40, is controlled by the control unit 90, and is a coating liquid for the electrode material stored in the storage tank 20. 6 is pumped to the supply pipe 30. The supply valves 32 and 34 are controlled by the control unit 90 to repeatedly open and close each branched flow path of the supply pipe 37. As a result, the supply / stop of the coating liquid 6 to the coating nozzles 11 and 12 is repeatedly switched. Specifically, the supply valve 32 intermittently discharges the coating liquid 6 from the coating nozzle 11 toward one surface 5a of the base material 5 by repeatedly switching the opening and closing of the supply pipe 37. The supply valve 34 intermittently discharges the coating liquid 6 from the coating nozzle 12 toward one surface 5a of the base material 5 by repeatedly switching the opening and closing of the supply pipe 38. The filter 33 is inserted in the path of the supply pipe 37 at a portion between the portion where the supply pipe 37 branches toward the supply valves 32 and 34 and the connection portion between the supply pipe 37 and the circulation pipe 40, and is inserted into the supply pipe. Foreign matter is removed from the coating liquid 6 flowing toward the coating nozzles 11 and 12.

塗工ノズル１１（１２）は、基材５の幅方向に沿ってスリット状の吐出口１１ａ、１２ａを設けたスリットノズル（「スリットダイ」）である。吐出口１１ａ、１２ａは、基材５の一方面５ａに沿って基材５の長手方向に直交する方向に延びて一方面５ａに対向する。塗工ノズル１１（１２）は、供給配管３０、３７（３８）を経由して送給された塗工液６をバックアップローラ１３（１４）に押圧支持された状態で走行する基材５の表面に吐出口１１ａ（１２ａ）から塗工する。 The coating nozzle 11 (12) is a slit nozzle (“slit die”) provided with slit-shaped discharge ports 11a and 12a along the width direction of the base material 5. The discharge ports 11a and 12a extend along one surface 5a of the base material 5 in a direction orthogonal to the longitudinal direction of the base material 5 and face the one surface 5a. The coating nozzle 11 (12) is the surface of the base material 5 that travels in a state where the coating liquid 6 supplied via the supply pipes 30 and 37 (38) is pressed and supported by the backup roller 13 (14). The coating is applied from the discharge port 11a (12a).

塗工ノズル１１（１２）は、基材５の一方面５ａ側にそれぞれ配置されている。塗工ノズル１２は、塗工ノズル１１よりも搬送機構８０による基材５の搬送方向の下流側に配置されている。 The coating nozzles 11 (12) are arranged on one side 5a side of the base material 5, respectively. The coating nozzle 12 is arranged on the downstream side of the coating nozzle 11 in the transport direction of the base material 5 by the transport mechanism 80.

また、塗工ノズル１１の吐出口（「第１吐出口」）１１ａと、一方面５ａのうち吐出口１１ａが対向する第１部分Ｐ１との間隔Ｄ１よりも、塗工ノズル１２の吐出口（「第２吐出口」）１２ａと、一方面５ａのうち吐出口１２ａが対向する第２部分Ｐ２との間隔Ｄ２が長い。また、間隔Ｄ２は塗工ノズル１２に対向して通過する塗工膜７１の膜厚寸法よりも大きい。 Further, the discharge port ("first discharge port") 11a of the coating nozzle 11 and the discharge port ("first discharge port") 11a of the coating nozzle 12 are closer than the distance D1 between the first portion P1 of the one surface 5a where the discharge port 11a faces. The distance D2 between the “second discharge port”) 12a and the second portion P2 of the one surface 5a on which the discharge port 12a faces is long. Further, the interval D2 is larger than the film thickness dimension of the coating film 71 passing facing the coating nozzle 12.

供給配管３０の経路途中から分岐して設けられた循環配管４０の先端側は貯留タンク２０に接続されている。供給配管３０、３７、３８と同じく、循環配管４０としてもステンレス管または樹脂管を用いることができる。循環配管４０は、貯留タンク２０から送出されて供給配管３７から流れ込んだ塗工液６を貯留タンク２０に還流させる。循環配管４０には、循環バルブ４１およびフィルタ４３が介挿されている。循環バルブ４１は、制御部９０によって制御されて、循環配管４０の流路を開閉する。フィルタ４３は、循環バルブ４１と貯留タンク２０との間に設けられており、循環配管４０を貯留タンク２０へと向けて流れる塗工液６から異物を取り除く。 The tip end side of the circulation pipe 40 branched from the middle of the route of the supply pipe 30 is connected to the storage tank 20. Similar to the supply pipes 30, 37, 38, a stainless steel pipe or a resin pipe can be used as the circulation pipe 40. The circulation pipe 40 returns the coating liquid 6 sent from the storage tank 20 and flowing from the supply pipe 37 to the storage tank 20. A circulation valve 41 and a filter 43 are inserted in the circulation pipe 40. The circulation valve 41 is controlled by the control unit 90 to open and close the flow path of the circulation pipe 40. The filter 43 is provided between the circulation valve 41 and the storage tank 20, and removes foreign matter from the coating liquid 6 flowing toward the storage tank 20 through the circulation pipe 40.

循環バルブ４１を閉止しつつ供給バルブ３２（３４）を開放すると、貯留タンク２０から送出された塗工液６は供給配管３０，３７（３８）の全体にわたって流れ、塗工ノズル１１（１２）へと供給される。 When the supply valve 32 (34) is opened while closing the circulation valve 41, the coating liquid 6 sent from the storage tank 20 flows over the entire supply pipes 30, 37 (38) and reaches the coating nozzle 11 (12). Is supplied.

一方、供給バルブ３２（３４）を閉止しつつ循環バルブ４１を開放すると、貯留タンク２０から送出された塗工液６は供給配管３０の途中まで流れて循環配管４０に流入し、再び貯留タンク２０へと還流される。すなわち、供給バルブ３２（３４）は、貯留タンク２０から送入される塗工液６の、供給配管３７を介した塗工ノズル１１（１２）への送出／停止を繰り返し切り替えることで、塗工液６を塗工ノズル１１（１２）から間欠的に吐出させる切替手段として機能する。 On the other hand, when the circulation valve 41 is opened while closing the supply valve 32 (34), the coating liquid 6 sent out from the storage tank 20 flows to the middle of the supply pipe 30 and flows into the circulation pipe 40, and is again stored in the storage tank 20. Is refluxed to. That is, the supply valve 32 (34) is coated by repeatedly switching the sending / stopping of the coating liquid 6 supplied from the storage tank 20 to the coating nozzle 11 (12) via the supply pipe 37. It functions as a switching means for intermittently discharging the liquid 6 from the coating nozzle 11 (12).

供給バルブ３２、３４および循環バルブ４１の開閉のタイミングは制御部９０によって適宜に制御され、この開閉を繰り返し切り替えることで、基材５の所定位置に所定幅で塗工液６が間欠的に塗布される。制御部９０は、塗工ノズル１１により基材５の一方面５ａ上に間欠的に形成される複数の塗工膜７１のうち互いに隣り合う塗工膜７１に挟まれた一方面５ａ上の複数の領域のそれぞれに、塗工ノズル１２により塗工膜７２を形成するように、塗工液供給機構３を制御する。より詳細には、塗工装置１０は、基材５の搬送方向における塗工膜７１の前端、若しくは後端を検出するフォトセンサ３６をさらに備える。フォトセンサ３６は、制御部９０と電気的に接続されており、フォトセンサ３６の検出信号は、制御部９０に供給される。制御部９０は、当該検出信号に基づいて、塗工ノズル１１が基材５に形成した塗工膜７１の前端若しくは後端を検出する。制御部９０は、検出したタイミングと、基材５の搬送経路における塗工ノズル１１と塗工ノズル１２との距離、および基材５の搬送速度等に基づいて、供給バルブ３２、３４の開閉のタイミングを制御して、隣り合う塗工膜７１に挟まれた一方面５ａにおける領域に塗工ノズル１２から塗工液６を吐出させる。 The timing of opening and closing of the supply valves 32 and 34 and the circulation valve 41 is appropriately controlled by the control unit 90, and by repeatedly switching the opening and closing, the coating liquid 6 is intermittently applied to a predetermined position of the base material 5 with a predetermined width. Will be done. The control unit 90 is a plurality of coating films 71 intermittently formed on one surface 5a of the base material 5 by the coating nozzle 11 and sandwiched between coating films 71 adjacent to each other on one surface 5a. The coating liquid supply mechanism 3 is controlled so that the coating film 72 is formed by the coating nozzle 12 in each of the regions. More specifically, the coating device 10 further includes a photo sensor 36 that detects the front end or the rear end of the coating film 71 in the transport direction of the base material 5. The photo sensor 36 is electrically connected to the control unit 90, and the detection signal of the photo sensor 36 is supplied to the control unit 90. The control unit 90 detects the front end or the rear end of the coating film 71 formed on the base material 5 by the coating nozzle 11 based on the detection signal. The control unit 90 opens and closes the supply valves 32 and 34 based on the detected timing, the distance between the coating nozzle 11 and the coating nozzle 12 in the transport path of the base material 5, the transport speed of the base material 5, and the like. The timing is controlled so that the coating liquid 6 is discharged from the coating nozzle 12 to the region on one surface 5a sandwiched between the adjacent coating films 71.

このとき、塗工ノズル１１と一方面５ａとの間隔Ｄ１よりも、塗工ノズル１２と、一方面５ａとの間隔Ｄ２が長く、また、間隔Ｄ２は塗工ノズル１２に対向して通過する塗工膜７１の膜厚寸法よりも大きくなっている。この結果、塗工ノズル１２が塗工膜７１に接触することが防止されて、塗工膜７１の損傷を防止することができる。 At this time, the distance D2 between the coating nozzle 12 and the one surface 5a is longer than the distance D1 between the coating nozzle 11 and the one surface 5a, and the distance D2 is the coating that passes toward the coating nozzle 12. It is larger than the film thickness dimension of the work film 71. As a result, the coating nozzle 12 is prevented from coming into contact with the coating film 71, and damage to the coating film 71 can be prevented.

これにより、基材５の一方面５ａには、図３に示されるように、塗工ノズル１１により形成された塗工膜７１と、塗工ノズル１２により形成された塗工膜７２とが基材５の搬送方向に沿って交互に並ぶ。塗工膜７１と塗工膜７２とは交互に略等間隔で並んでいる。隣り合う塗工膜７１（７２）同士の間隔は、塗工ノズル１１のみによって間欠塗工を行う場合に比べて広くできる。従って、供給バルブ３２、３４に要求される応答時間に余裕ができるので、図３に示す未塗工長Ｕ１を短くすることができる。この結果、無駄になる基材５を減らすことができる。換言すれば、例えば、塗工ノズル１１のみで間欠塗工を実行すると、供給バルブ３２の応答時間に起因して未塗工長が上記未塗工長Ｕ１よりも長くなる。未塗工長が長くなるとリチウムイオン二次電池の製造に際し無駄になる基材５が多くなる。 As a result, as shown in FIG. 3, the coating film 71 formed by the coating nozzle 11 and the coating film 72 formed by the coating nozzle 12 are formed on one surface 5a of the base material 5. The materials 5 are arranged alternately along the transport direction. The coating film 71 and the coating film 72 are alternately arranged at substantially equal intervals. The distance between adjacent coating films 71 (72) can be widened as compared with the case where intermittent coating is performed only by the coating nozzle 11. Therefore, since the response time required for the supply valves 32 and 34 can be spared, the uncoated length U1 shown in FIG. 3 can be shortened. As a result, the wasted base material 5 can be reduced. In other words, for example, when the intermittent coating is executed only by the coating nozzle 11, the uncoated length becomes longer than the uncoated length U1 due to the response time of the supply valve 32. If the uncoated length becomes long, the amount of the base material 5 that is wasted in the production of the lithium ion secondary battery increases.

また、図２の例示では、圧力計３５が付設されている。圧力計３５は例えば、循環配管４０との接続部位とポンプ３１との間の位置で供給配管３０に設けられる。圧力計３５が計測する測定値は制御部９０に出力される。制御部９０は例えば当該圧力が所望の値となるようにポンプ３１の駆動速度（回転速度）を制御することができる。 Further, in the example of FIG. 2, a pressure gauge 35 is attached. The pressure gauge 35 is provided in the supply pipe 30 at a position between the connection portion with the circulation pipe 40 and the pump 31, for example. The measured value measured by the pressure gauge 35 is output to the control unit 90. The control unit 90 can control the driving speed (rotational speed) of the pump 31 so that the pressure becomes a desired value, for example.

さて塗工装置においては、上述の通り、供給配管３７の基端に設けられる供給バルブ３２（３４）を開閉制御することで、供給配管３７の先端に設けられる塗工ノズル１１（１２）からの塗工液６の間欠塗工を制御する。 In the coating apparatus, as described above, by controlling the opening and closing of the supply valve 32 (34) provided at the base end of the supply pipe 37, the coating nozzle 11 (12) provided at the tip of the supply pipe 37 can be used. Controls the intermittent coating of the coating liquid 6.

＜３．塗工ヘッドと基材との距離と、塗工液６の状態について＞
図４は、塗工ノズル１２を例として、塗工ノズル１２と基材５との距離と、塗工ノズル１２と基材５との間に形成される液溜まりとの関係を説明するための図である。この関係は、塗工ノズル１１が吐出する塗工液６についても当てはまる。 <3. About the distance between the coating head and the base material and the state of the coating liquid 6>
FIG. 4 takes the coating nozzle 12 as an example to explain the relationship between the distance between the coating nozzle 12 and the base material 5 and the liquid pool formed between the coating nozzle 12 and the base material 5. It is a figure. This relationship also applies to the coating liquid 6 discharged by the coating nozzle 11.

図４には、塗工ノズル１２の上流側先端部１２１と基材５の一方面５ａとの間隔と、上流側先端部１２１と一方面５ａとの間隔とが等しい場合が示されている。 FIG. 4 shows a case where the distance between the upstream tip portion 121 of the coating nozzle 12 and one surface 5a of the base material 5 is equal to the distance between the upstream tip portion 121 and one surface 5a.

塗工ノズル１１と塗工ノズル１２とによって、図３に示されるように、基材５上に交互に塗工膜７を形成する場合、塗工ノズル１２が形成した塗工膜７１の厚みよりも、塗工ノズル１２と基材５との間隔Ｄ２が狭い場合、塗工ノズル１２が塗工膜７１に衝突してしまう。 As shown in FIG. 3, when the coating film 7 is alternately formed on the base material 5 by the coating nozzle 11 and the coating nozzle 12, the thickness of the coating film 71 formed by the coating nozzle 12 is increased. However, when the distance D2 between the coating nozzle 12 and the base material 5 is narrow, the coating nozzle 12 collides with the coating film 71.

そこで、塗工装置１０は、上述のように、塗工ノズル１１の吐出口１１ａと、一方面５ａのうち吐出口１１ａが対向する第１部分Ｐ１との間隔Ｄ１よりも、塗工ノズル１２の吐出口１２ａと、一方面５ａのうち吐出口１２ａが対向する第２部分Ｐ２との間隔Ｄ２が長く設定されている（図２参照）。 Therefore, as described above, the coating device 10 has a coating nozzle 12 rather than a distance D1 between the discharge port 11a of the coating nozzle 11 and the first portion P1 of the one surface 5a on which the discharge port 11a faces. The distance D2 between the discharge port 12a and the second portion P2 of the one surface 5a on which the discharge port 12a faces is set long (see FIG. 2).

以下では、間隔Ｄ２を長くしていった場合の影響について説明する。 In the following, the effect of increasing the interval D2 will be described.

図４には、上流側先端部１２１、下流側先端部１２２と、一方面５ａとの間隔が間隔Ｈ１に設定されている塗工ノズル１２が実線で示されるとともに、当該塗工ノズル１２から吐出された塗工液６の輪郭が実線にて示されている。さらに、当該間隔が間隔Ｈ１よりも大きい間隔Ｈ２に設定されている塗工ノズル１２が一点鎖線にて示されているとともに、当該塗工ノズル１２から吐出された塗工液６の輪郭が破線にて示されている。 In FIG. 4, a coating nozzle 12 in which the distance between the upstream tip portion 121 and the downstream tip portion 122 and one surface 5a is set to the interval H1 is shown by a solid line, and is discharged from the coating nozzle 12. The outline of the coating liquid 6 is shown by a solid line. Further, the coating nozzle 12 whose interval is set to the interval H2 larger than the interval H1 is indicated by a chain line, and the outline of the coating liquid 6 discharged from the coating nozzle 12 is shown by a broken line. Is shown.

例えば、塗工液６の粘度が４０００ｃｐで、基材５への吐出直後の乾燥前における塗工膜７の膜厚が１００ｕｍであれば、塗工ノズルと基材５との間隔（「塗工ギャップ」とも称される）は、例えば、７０μｍ〜１３０μｍ程度に設定される。 For example, if the viscosity of the coating liquid 6 is 4000 cp and the film thickness of the coating film 7 immediately after being discharged to the base material 5 and before drying is 100 um, the distance between the coating nozzle and the base material 5 (“coating”). The gap) is set to, for example, about 70 μm to 130 μm.

この場合、例えば、間隔Ｈ１が７０μｍで、間隔Ｈ２が１３０μｍであるとすると、間隔Ｈ１が間隔Ｈ２に変動すると、図４に示されるように、搬送方向の上流側における塗工液６のメニスカスは、上方（下流側）に移動し、下流側のメニスカスは、下方（上流側）に移動する。 In this case, for example, assuming that the interval H1 is 70 μm and the interval H2 is 130 μm, when the interval H1 fluctuates to the interval H2, the meniscus of the coating liquid 6 on the upstream side in the transport direction is as shown in FIG. , Moves upward (downstream side), and the meniscus on the downstream side moves downward (upstream side).

図５は、塗工ヘッドと基材５との間隔Ｈ３が図４の間隔Ｈ２よりもさらに長くなり、塗工液６に空気が巻き込まれる状態を示す模式図である。間隔Ｈ２が間隔Ｈ３になった場合、基材５に吐出された塗工液６の上流側のメニスカスは、図４において破線で示された状態からさらに上方（下流側）に移動し、上流側先端部１２１の基材５に対向する先端面の下流側の端部に到達する。この状態になると、塗工液６に対して搬送方向の上流側から空気が塗工液６に巻き込まれて塗工液６内に進入し、塗工液６内に多数の気泡２０１が生ずる。また、塗工液６内に多数の気泡２０１が上流側から進入したことにより塗工液６が下流側へと押し出され、押し出された塗工液６０１は、下流側先端部１２２の下流側の側面に達する。 FIG. 5 is a schematic view showing a state in which the distance H3 between the coating head and the base material 5 is longer than the distance H2 in FIG. 4 and air is entrained in the coating liquid 6. When the interval H2 becomes the interval H3, the meniscus on the upstream side of the coating liquid 6 discharged to the base material 5 moves further upward (downstream side) from the state shown by the broken line in FIG. 4, and is on the upstream side. It reaches the downstream end of the tip surface of the tip 121 facing the base material 5. In this state, air is entrained in the coating liquid 6 from the upstream side in the transport direction with respect to the coating liquid 6 and enters the coating liquid 6, and a large number of bubbles 201 are generated in the coating liquid 6. Further, a large number of bubbles 201 enter the coating liquid 6 from the upstream side, so that the coating liquid 6 is pushed out to the downstream side, and the pushed out coating liquid 601 is located on the downstream side of the downstream tip portion 122. Reach the side.

図６、図７は、図５の塗工液６によって塗工膜７が形成された基材５を例示する平面模式図である。図５に示されるように、塗工液６内に上流側から空気が巻き込まれて塗工液６内で多数の気泡２０１になると、図６に示されるように、基材５に形成された塗工膜７には、多数の気泡２０１が含まれ、塗工膜７は、要求される品質を満たさない。 6 and 7 are schematic plan views illustrating the base material 5 on which the coating film 7 is formed by the coating liquid 6 of FIG. As shown in FIG. 5, when air is entrained in the coating liquid 6 from the upstream side and a large number of bubbles 201 are formed in the coating liquid 6, they are formed on the base material 5 as shown in FIG. The coating film 7 contains a large number of bubbles 201, and the coating film 7 does not satisfy the required quality.

また、図５に示されるように、気泡２０１に押し出された塗工液６０１が、下流側先端部１２２の下流側の側面に達すると、図７に示されるように、塗工液６が塗工液６０１によって引っ張られることによって、形成された塗工膜７の表面に、搬送方向に延在する筋２０２が生ずる。これにより、塗工膜７は、要求される品質を満たさない。 Further, as shown in FIG. 5, when the coating liquid 601 extruded into the bubbles 201 reaches the downstream side surface of the downstream tip portion 122, the coating liquid 6 is applied as shown in FIG. By being pulled by the working liquid 601, a streak 202 extending in the transport direction is formed on the surface of the formed coating film 7. As a result, the coating film 7 does not meet the required quality.

＜４．塗工ヘッドの構成例＞
図８〜図１０は、それぞれ、塗工装置１０の塗工ノズル１２の構成例を説明するための断面模式図である。 <4. Coating head configuration example>
8 to 10 are schematic cross-sectional views for explaining a configuration example of the coating nozzle 12 of the coating apparatus 10, respectively.

塗工ノズル１２は、上述した塗工液６への空気の巻き込みにより生ずる問題を抑制するために、図８〜図１０に例示される各構成を採用し得る。 The coating nozzle 12 may adopt each of the configurations exemplified in FIGS. 8 to 10 in order to suppress the problem caused by the entrainment of air in the coating liquid 6 described above.

図８、図９に示される塗工ノズル１２は、その吐出口１２ａを規定する搬送方向の上流側先端部１２１と下流側先端部１２２とを含んでいる。上流側先端部１２１と基材５の一方面５ａの第２部分Ｐ２との間隔Ｄ２Ｆと、下流側先端部１２２と第２部分Ｐ２との間隔Ｄ２Ｒとが異なっている。 The coating nozzle 12 shown in FIGS. 8 and 9 includes an upstream tip portion 121 and a downstream tip portion 122 in the transport direction that define the discharge port 12a. The distance D2F between the upstream tip portion 121 and the second portion P2 on one surface 5a of the base material 5 and the distance D2R between the downstream tip portion 122 and the second portion P2 are different.

図８の例では、塗工ノズル１２の上流側先端部１２１が下流側先端部１２２よりも基材５の一方面５ａに近い。 In the example of FIG. 8, the upstream tip portion 121 of the coating nozzle 12 is closer to one surface 5a of the base material 5 than the downstream tip portion 122.

逆に、図９の例では、塗工ノズル１２の下流側先端部１２２が上流側先端部１２１よりも基材５の一方面５ａに近い。 On the contrary, in the example of FIG. 9, the downstream tip portion 122 of the coating nozzle 12 is closer to one surface 5a of the base material 5 than the upstream tip portion 121.

なお、図１０の例では、図４、図５の例と同様に、間隔Ｄ２Ｆと間隔Ｄ２Ｒとは等しくなっている。塗工条件によっては、図１０に示される構成を用いたとしても、塗工ノズル１１が形成する塗工膜７１に塗工ノズル１２の先端部が衝突せず、かつ、図５、図６に示されるような不具合も発生しない場合がある。従って、塗工ノズル１２として図１０の構成が採用されてもよい。 In the example of FIG. 10, the interval D2F and the interval D2R are equal to each other, as in the examples of FIGS. 4 and 5. Depending on the coating conditions, even if the configuration shown in FIG. 10 is used, the tip of the coating nozzle 12 does not collide with the coating film 71 formed by the coating nozzle 11, and FIGS. 5 and 6 show. The problems shown may not occur. Therefore, the configuration of FIG. 10 may be adopted as the coating nozzle 12.

図８〜図１０においては、塗工ノズル１２と基材５との間隔Ｄ２は、何れも等しい。間隔Ｄ２は、上流側先端部１２１の先端と基材５（第２部分Ｐ２）との間隔と、下流側先端部１２２の先端と基材５（第２部分Ｐ２）との間隔のうち短い間隔である。 In FIGS. 8 to 10, the distance D2 between the coating nozzle 12 and the base material 5 is the same. The interval D2 is the shortest interval between the tip of the upstream tip 121 and the base material 5 (second part P2) and the distance between the tip of the downstream tip 122 and the base 5 (second part P2). Is.

図８、図９に示されるように、間隔Ｄ２Ｆと間隔Ｄ２Ｒとが異なっていると、塗工ノズル１２における圧力損失は、吐出口１２ａの上流側と、下流側とで異なって、図１０に示される塗工液６の液溜まり６３に比べて、図８、図９の液溜まり６１、液溜まり６２は、大きくなる。これにより、図８、図９の状態から間隔Ｄ２をさらに長くしたとしても、基材５の搬送方向の上流側から塗工液６内への空気の巻き込みを抑制できる。 As shown in FIGS. 8 and 9, when the interval D2F and the interval D2R are different, the pressure loss in the coating nozzle 12 differs between the upstream side and the downstream side of the discharge port 12a, and is shown in FIG. Compared to the liquid pool 63 of the coating liquid 6 shown, the liquid pool 61 and the liquid pool 62 in FIGS. 8 and 9 are larger. As a result, even if the interval D2 is further lengthened from the state of FIGS. 8 and 9, it is possible to suppress the entrainment of air into the coating liquid 6 from the upstream side in the transport direction of the base material 5.

図８の例では、間隔Ｄ２Ｆが、間隔Ｄ２Ｒよりも短いので、塗工ノズル１２における圧力損失は、吐出口１２ａの上流側が小さく、下流側が大きい。このため、液溜まり６１は、下流側において大きくなる。図８に示される構成は、粘度が低い塗工液６に対して適用することが好ましい。粘度が低い場合には、粘度が高い場合に比べて、基材５の移動にともなって基材５に吐出された塗工液６が下流側に引っ張られにくいので、液溜まり６１を大きくできる。 In the example of FIG. 8, since the interval D2F is shorter than the interval D2R, the pressure loss in the coating nozzle 12 is small on the upstream side and large on the downstream side of the discharge port 12a. Therefore, the liquid pool 61 becomes large on the downstream side. The configuration shown in FIG. 8 is preferably applied to the coating liquid 6 having a low viscosity. When the viscosity is low, the coating liquid 6 discharged to the base material 5 is less likely to be pulled downstream as the base material 5 moves, so that the liquid pool 61 can be increased as compared with the case where the viscosity is high.

図９の例では、間隔Ｄ２Ｆが、間隔Ｄ２Ｒよりも長いので、塗工ノズル１２における圧力損失は、吐出口１２ａの上流側が大きく、下流側が小さい。このため、液溜まり６２は、下流側において大きくなる。図９に示される構成は、粘度が高い塗工液６に対して適用されることが好ましい。粘度が高い場合には、粘度が低い場合に比べて、形成された液溜まり６２が、上流側（下方）に流れ出しにくいので、液溜まり６２を大きくできる。 In the example of FIG. 9, since the interval D2F is longer than the interval D2R, the pressure loss in the coating nozzle 12 is large on the upstream side and small on the downstream side of the discharge port 12a. Therefore, the liquid pool 62 becomes large on the downstream side. The configuration shown in FIG. 9 is preferably applied to the coating liquid 6 having a high viscosity. When the viscosity is high, the formed liquid pool 62 is less likely to flow out to the upstream side (downward) than when the viscosity is low, so that the liquid pool 62 can be increased.

＜５．塗工膜形成システムの動作＞
図１１は、塗工装置１０の塗工ノズル１２の先端部（上流側先端部１２１、下流側先端部１２２）の調整を説明するための図である。図１２、図１３は、塗工膜形成システム１（塗工装置１０）の動作の一例を示すフローチャートである。 <5. Operation of coating film forming system>
FIG. 11 is a diagram for explaining the adjustment of the tip portion (upstream side tip portion 121, downstream side tip portion 122) of the coating nozzle 12 of the coating device 10. 12 and 13 are flowcharts showing an example of the operation of the coating film forming system 1 (coating apparatus 10).

以下に、図１１等の図面を参照しつつ、図１２、図１３のフローチャートに基づいて塗工膜形成システム１（塗工装置１０）の動作を説明する。 The operation of the coating film forming system 1 (coating apparatus 10) will be described below with reference to the drawings such as FIG. 11 based on the flowcharts of FIGS. 12 and 13.

図１２のステップＳ１０では、塗工ノズル１２の両先端部（上流側先端部１２１、下流側先端部１２２）の位置関係の調整（先端部設定工程）が行われる。 In step S10 of FIG. 12, the positional relationship (tip setting step) of both tip portions (upstream side tip portion 121, downstream side tip portion 122) of the coating nozzle 12 is adjusted.

ステップＳ１０の処理が開始されると、図１３のステップＳ１１０で、例えば、作業者が塗工液６の粘度が所定の基準値よりも低いか否かを判定する。 When the process of step S10 is started, in step S110 of FIG. 13, for example, the operator determines whether or not the viscosity of the coating liquid 6 is lower than a predetermined reference value.

ステップＳ１１０での判定の結果、塗工液６の粘度が基準値よりも低い場合には、作業者は、ステップＳ１２０において、図８に示されるように、塗工ノズル１２の上流側先端部１２１が下流側先端部１２２よりも基材５の一方面５ａに近い（一方面５ａ側に突出した）「フロント突出形状」の塗工ノズル１２を塗工装置１０に取り付ける。 As a result of the determination in step S110, when the viscosity of the coating liquid 6 is lower than the reference value, the operator in step S120, as shown in FIG. 8, the upstream tip portion 121 of the coating nozzle 12. Attaches a coating nozzle 12 having a “front protruding shape” closer to one surface 5a of the base material 5 (projecting toward the one surface 5a side) than the downstream tip portion 122 to the coating device 10.

当該塗工ノズル１２は、例えば、図１１に示されるように、上流側先端部１２１と上流側先端部１２１とを基台１９９上に設置し、上流側先端部１２１の基端と、基台１９９との間にスペーサー１９８を挿入した状態で、吐出口１２ａが形成されるように上流側先端部１２１と下流側先端部１２２とをネジ止め等によって固定することによって調整される。スペーサー１９８の高さは、上流側先端部１２１と下流側先端部１２２とのそれぞれの先端間に、所望長さの段差ができるように設定される。 For example, as shown in FIG. 11, the coating nozzle 12 has an upstream tip portion 121 and an upstream tip portion 121 installed on a base 199, and the base end of the upstream tip portion 121 and a base. With the spacer 198 inserted between the spacer 198 and the spacer 198, the upstream tip portion 121 and the downstream tip portion 122 are fixed by screwing or the like so that the discharge port 12a is formed. The height of the spacer 198 is set so that a step of a desired length is formed between the tips of the upstream tip 121 and the downstream tip 122, respectively.

ステップＳ１１０の判定の結果、塗工液６の粘度が基準値以上である場合には、ステップＳ１３０の処理が行われる。 As a result of the determination in step S110, if the viscosity of the coating liquid 6 is equal to or higher than the reference value, the process of step S130 is performed.

ステップＳ１３０では、作業者は、図９に示されるように、塗工ノズル１２の下流側先端部１２２が上流側先端部１２１よりも基材５の一方面５ａに近い「リア突出形状」の塗工ノズル１２を塗工装置１０に取り付ける。塗工ノズル１２を「リア突出形状」に調整する場合には、図１１の調整において、スペーサー１９８は、下流側先端部１２２の下方に挿入される。 In step S130, as shown in FIG. 9, the operator applies a “rear protruding shape” in which the downstream tip portion 122 of the coating nozzle 12 is closer to the one surface 5a of the base material 5 than the upstream tip portion 121. The work nozzle 12 is attached to the coating device 10. When the coating nozzle 12 is adjusted to have a “rear protruding shape”, the spacer 198 is inserted below the downstream tip portion 122 in the adjustment shown in FIG.

作業者が、ステップＳ１１０〜Ｓ１３０を行う代わりに、塗工装置１０が予め調整された「フロント突出形状」の塗工ノズル１２と、「リア突出形状」の塗工ノズル１２とをそれぞれ備えており、所定の交換機構によって、これらの塗工ノズル１２を移動させて塗工装置１０への取付を行ってもよい。 Instead of performing steps S110 to S130, the operator includes a coating nozzle 12 having a "front protruding shape" and a coating nozzle 12 having a "rear protruding shape", respectively, in which the coating device 10 is adjusted in advance. , These coating nozzles 12 may be moved and attached to the coating apparatus 10 by a predetermined replacement mechanism.

ステップＳ１０の処理は、塗工ノズル１２の上流側先端部１２１と基材５の一方面５ａの第２部分Ｐ２との第１間隔Ｄ２Ｆと、塗工ノズル１２の下流側先端部１２２と第２部分Ｐ２との第２間隔Ｄ２Ｒとの大小関係が塗工液６の粘度に適した関係となるように、上流側先端部１２１と下流側先端部１２２との位置関係を、塗工液６吐出工程に先立って設定する処理である。 The process of step S10 includes the first interval D2F between the upstream tip portion 121 of the coating nozzle 12 and the second portion P2 of the one surface 5a of the base material 5, and the downstream tip portions 122 and the second portion of the coating nozzle 12. The positional relationship between the upstream tip portion 121 and the downstream tip portion 122 is set so that the magnitude relationship with the second interval D2R with the portion P2 is suitable for the viscosity of the coating liquid 6, and the coating liquid 6 is discharged. This is a process that is set prior to the process.

この処理は、具体的には、例えば、塗工液６の粘度が所定の基準値よりも低い場合には、上流側先端部１２１に係る第１間隔Ｄ２Ｆが、下流側先端部１２２に係る第２間隔Ｄ２Ｒよりも広くなるように上流側先端部１２１と下流側先端部１２２との位置関係を設定し、塗工液６の粘度が基準値よりも高い場合には、第１間隔Ｄ２Ｆが第２間隔Ｄ２Ｒよりも広くなるように当該位置関係を設定する処理である。 Specifically, in this treatment, for example, when the viscosity of the coating liquid 6 is lower than a predetermined reference value, the first interval D2F related to the upstream tip portion 121 is the first interval D2F related to the downstream tip portion 122. The positional relationship between the upstream tip 121 and the downstream tip 122 is set so as to be wider than the two intervals D2R, and when the viscosity of the coating liquid 6 is higher than the reference value, the first interval D2F is the first. This is a process of setting the positional relationship so as to be wider than the two intervals D2R.

ステップＳ１２０またはステップＳ１３０の処理が終了すると、図１２のステップＳ２０の処理が行われる。 When the process of step S120 or step S130 is completed, the process of step S20 of FIG. 12 is performed.

ステップＳ２０では、塗工膜形成システム１（塗工装置１０）は、基材５の搬送を開始する。塗工膜形成システム１が搬送機構８０を駆動して、基材５を所定の搬送経路に沿って、所定の搬送方向へ移動させる。 In step S20, the coating film forming system 1 (coating apparatus 10) starts transporting the base material 5. The coating film forming system 1 drives the transport mechanism 80 to move the base material 5 in a predetermined transport direction along a predetermined transport path.

ステップＳ３０では、塗工装置１０は、基材５への塗工膜７（塗工膜７１、塗工膜７２）の形成を行う。上述したように、制御部９０は、フォトセンサ３６の出力信号に基づいて、供給バルブ３２、３４の開閉制御を行う。基材５の搬送速度は、例えば、６０ｍ／秒〜１００ｍ／秒に設定され、塗工膜７１と塗工膜７２との間の未塗工長Ｕ１は、例えば、１０ｍｍ〜２０ｍｍ程度に設定される。塗工装置１０は、基材５に対して、定められた個数の複数の塗工膜７を形成する。 In step S30, the coating device 10 forms the coating film 7 (coating film 71, coating film 72) on the base material 5. As described above, the control unit 90 controls the opening and closing of the supply valves 32 and 34 based on the output signal of the photo sensor 36. The transport speed of the base material 5 is set to, for example, 60 m / sec to 100 m / sec, and the uncoated length U1 between the coating film 71 and the coating film 72 is set to, for example, about 10 mm to 20 mm. To. The coating device 10 forms a predetermined number of coating films 7 on the base material 5.

ステップＳ４０では、塗工膜形成システム１は、搬送機構８０によって塗工膜７が形成された基材５（基材５の塗工膜７）を乾燥部にて乾燥させる。 In step S40, the coating film forming system 1 dries the base material 5 (coating film 7 of the base material 5) on which the coating film 7 is formed by the transport mechanism 80 in the drying portion.

ステップＳ５０では、塗工膜形成システム１は、搬送機構８０を停止させて基材５の搬送を終了し、図１２の動作を終了する。 In step S50, the coating film forming system 1 stops the transport mechanism 80, finishes the transport of the base material 5, and ends the operation of FIG.

＜６．塗工膜形成システムの他の構成例＞
図１４は、実施形態に係る塗工装置１０を組み込んだ塗工膜形成システム１の全体構成の他の例を示す図である。図１の塗工膜形成システム１は、塗工ノズル１２は、基材５の搬送方向の上流側から下流側に向かって、上方に移動する搬送経路の途中で塗工膜７２を形成していた。しかし、図１４に示されるように、塗工ノズル１２により形成された塗工膜７２が、略水平な経路に沿って乾燥部１５０側に搬送される構成が採用されてもよい。 <6. Other Configuration Examples of Coating Film Formation System>
FIG. 14 is a diagram showing another example of the overall configuration of the coating film forming system 1 incorporating the coating apparatus 10 according to the embodiment. In the coating film forming system 1 of FIG. 1, the coating nozzle 12 forms the coating film 72 in the middle of the conveying path moving upward from the upstream side to the downstream side in the conveying direction of the base material 5. It was. However, as shown in FIG. 14, a configuration may be adopted in which the coating film 72 formed by the coating nozzle 12 is conveyed to the drying portion 150 side along a substantially horizontal path.

以上のように構成された本実施形態に係る塗工装置によれば、塗工ノズル１１の吐出口１１ａと、基材５の一方面５ａのうち吐出口１１ａが対向する第１部分Ｐ１との間隔Ｄ１よりも、塗工ノズル１２の吐出口１２ａと、当該一方面５ａのうち吐出口１２ａが対向する第２部分Ｐ２との間隔Ｄ２が長い。従って、塗工ノズル１１により基材５の一方面５ａ上に間欠的に形成される複数の塗工膜７１のうち互いに隣り合う塗工膜７１に挟まれた一方面５ａ上の複数の領域のそれぞれに、塗工ノズル１２により塗工膜７２を形成する際に、塗工ノズル１１によって形成された塗工膜７１に塗工ノズル１２が接触することを防止することができる。従って、当該塗工装置が基材５上に塗工液６を間欠的に塗工して塗工膜７を形成する際に、塗工膜７の損傷を防止することができる。 According to the coating apparatus according to the present embodiment configured as described above, the discharge port 11a of the coating nozzle 11 and the first portion P1 of the one surface 5a of the base material 5 facing the discharge port 11a. The distance D2 between the discharge port 12a of the coating nozzle 12 and the second portion P2 of the one surface 5a on which the discharge port 12a faces is longer than the distance D1. Therefore, among the plurality of coating films 71 intermittently formed on the one surface 5a of the base material 5 by the coating nozzle 11, the plurality of regions on the one surface 5a sandwiched between the coating films 71 adjacent to each other. When the coating film 72 is formed by the coating nozzle 12, it is possible to prevent the coating nozzle 12 from coming into contact with the coating film 71 formed by the coating nozzle 11. Therefore, when the coating apparatus intermittently coats the coating liquid 6 on the base material 5 to form the coating film 7, damage to the coating film 7 can be prevented.

また、本実施形態に係る塗工装置によれば、塗工ノズル１２の上流側先端部１２１と基材５との間隔Ｄ２Ｆと、塗工ノズル１２の下流側先端部１２２と基材５との間隔Ｄ２Ｒとが異なる。従って、塗工ノズル１２の両先端部と基材５との間に形成される塗工液６の液溜まりを大きくすることができる。これにより、塗工液６に空気が巻き込まれて塗工膜７２に気泡が混入することを抑制しつつ、塗工ノズル１２と基材５との間隔Ｄ２をより広くして塗工ノズル１２による塗工膜７１の損傷をより確実に防止することができる。 Further, according to the coating apparatus according to the present embodiment, the distance D2F between the upstream tip portion 121 of the coating nozzle 12 and the base material 5 and the downstream tip portion 122 of the coating nozzle 12 and the base material 5 are provided. The interval D2R is different. Therefore, it is possible to increase the amount of the coating liquid 6 formed between both tips of the coating nozzle 12 and the base material 5. As a result, while suppressing air from being entrained in the coating liquid 6 and air bubbles from being mixed into the coating film 72, the distance D2 between the coating nozzle 12 and the base material 5 is made wider by the coating nozzle 12. Damage to the coating film 71 can be prevented more reliably.

また、本実施形態に係る塗工装置によれば、塗工ノズル１２の上流側先端部１２１が下流側先端部１２２よりも基材５の一方面５ａに近いので、塗工液６の粘度が低い場合に、塗工ノズル１２の両先端部と基材５との間に形成される塗工液６の液溜まりを大きくすることができる。 Further, according to the coating apparatus according to the present embodiment, since the upstream tip portion 121 of the coating nozzle 12 is closer to one surface 5a of the base material 5 than the downstream tip portion 122, the viscosity of the coating liquid 6 is high. When it is low, the liquid pool of the coating liquid 6 formed between both tip portions of the coating nozzle 12 and the base material 5 can be increased.

また、本実施形態に係る塗工装置によれば、塗工ノズル１２の下流側先端部１２２が上流側先端部１２１よりも基材５の一方面５ａに近いので、塗工液６の粘度が高い場合に、塗工ノズル１２の両先端部と基材５との間に形成される塗工液６の液溜まりを大きくすることができる。 Further, according to the coating apparatus according to the present embodiment, the downstream tip portion 122 of the coating nozzle 12 is closer to one surface 5a of the base material 5 than the upstream tip portion 121, so that the viscosity of the coating liquid 6 is high. When it is high, the liquid pool of the coating liquid 6 formed between both tip portions of the coating nozzle 12 and the base material 5 can be increased.

また、以上のような本実施形態に係る塗工方法によれば、塗工ノズル１１の吐出口１１ａと、基材５の一方面５ａのうち吐出口１１ａが対向する第１部分Ｐ１との間隔Ｄ１よりも、塗工ノズル１２の吐出口１２ａと、当該一方面５ａのうち吐出口１２ａが対向する第２部分Ｐ２との間隔Ｄ２が長い。従って、塗工ノズル１１により基材５の一方面５ａ上に間欠的に形成される複数の塗工膜７１のうち互いに隣り合う塗工膜７１に挟まれた一方面５ａ上の複数の領域のそれぞれに、塗工ノズル１２により塗工膜７２を形成する際に、塗工ノズル１１によって形成された塗工膜７１に塗工ノズル１２が接触することを防止することができる。従って、当該塗工方法によって基材５上に塗工液６を間欠的に塗工して塗工膜７を形成する際に、塗工膜７の損傷を防止することができる。 Further, according to the coating method according to the present embodiment as described above, the distance between the discharge port 11a of the coating nozzle 11 and the first portion P1 of the one surface 5a of the base material 5 on which the discharge port 11a faces. The distance D2 between the discharge port 12a of the coating nozzle 12 and the second portion P2 of the one surface 5a on which the discharge port 12a faces is longer than that of D1. Therefore, among the plurality of coating films 71 intermittently formed on the one surface 5a of the base material 5 by the coating nozzle 11, the plurality of regions on the one surface 5a sandwiched between the coating films 71 adjacent to each other. When the coating film 72 is formed by the coating nozzle 12, it is possible to prevent the coating nozzle 12 from coming into contact with the coating film 71 formed by the coating nozzle 11. Therefore, when the coating liquid 6 is intermittently applied onto the base material 5 to form the coating film 7 by the coating method, damage to the coating film 7 can be prevented.

また、本実施形態に係る塗工方法によれば、塗工ノズル１２の上流側先端部１２１と基材５との第１間隔Ｄ２Ｆと、塗工ノズル１２の下流側先端部１２２と基材５との第２間隔Ｄ２Ｒとの大小関係が塗工液６の粘度に適した関係となるように、上流側先端部１２１と下流側先端部１２２との位置関係が、塗工液吐出工程に先立って先端部設定工程において設定される。従って、上流側先端部１２１と下流側先端部１２２との位置関係が塗工液６の粘度に適している塗工ノズル１２を、塗工液吐出工程において用いることができるので、塗工ノズル１２の両先端部と基材５との間に形成される塗工液６の液溜まりを大きくすることができる。これにより、塗工液６に空気が巻き込まれて塗工膜７２に気泡が混入することを抑制しつつ、塗工ノズル１２と基材５との間隔Ｄ２をより広くして塗工ノズル１２による塗工膜７１の損傷をより確実に防止することができる。 Further, according to the coating method according to the present embodiment, the first distance D2F between the upstream tip portion 121 of the coating nozzle 12 and the base material 5 and the downstream tip portion 122 and the base material 5 of the coating nozzle 12 The positional relationship between the upstream tip portion 121 and the downstream tip portion 122 is prior to the coating liquid discharge process so that the magnitude relationship with the second interval D2R is suitable for the viscosity of the coating liquid 6. It is set in the tip setting process. Therefore, the coating nozzle 12 whose positional relationship between the upstream tip portion 121 and the downstream tip portion 122 is suitable for the viscosity of the coating liquid 6 can be used in the coating liquid discharge process, so that the coating nozzle 12 can be used. It is possible to increase the liquid pool of the coating liquid 6 formed between both tip portions and the base material 5. As a result, while suppressing air from being entrained in the coating liquid 6 and air bubbles from being mixed into the coating film 72, the distance D2 between the coating nozzle 12 and the base material 5 is made wider by the coating nozzle 12. Damage to the coating film 71 can be prevented more reliably.

また、本実施形態に係る塗工方法によれば、先端部設定工程は、塗工液６の粘度が所定の基準値よりも低い場合には、上流側先端部１２１に係る第１間隔Ｄ２Ｆが、下流側先端部１２２に係る第２間隔Ｄ２Ｒよりも広くなるように上流側先端部１２１と下流側先端部１２２との位置関係を設定し、塗工液６の粘度が基準値よりも高い場合には、第１間隔Ｄ２Ｆが第２間隔Ｄ２Ｒよりも広くなるように当該位置関係を設定する工程である。従って、塗工液６の粘度が基準値よりも高い場合と低い場合との何れにおいても、塗工ノズル１２と基材５との間に形成される塗工液６の液溜まりが大きくなる塗工ノズル１２を用いて塗工液吐出工程を行うことができる。 Further, according to the coating method according to the present embodiment, in the tip setting step, when the viscosity of the coating liquid 6 is lower than a predetermined reference value, the first interval D2F related to the upstream tip 121 is set. , When the positional relationship between the upstream tip portion 121 and the downstream tip portion 122 is set so as to be wider than the second interval D2R related to the downstream tip portion 122, and the viscosity of the coating liquid 6 is higher than the reference value. Is a step of setting the positional relationship so that the first interval D2F is wider than the second interval D2R. Therefore, regardless of whether the viscosity of the coating liquid 6 is higher or lower than the reference value, the liquid pool of the coating liquid 6 formed between the coating nozzle 12 and the base material 5 becomes large. The coating liquid discharge process can be performed using the work nozzle 12.

本発明は詳細に示され記述されたが、上記の記述は全ての態様において例示であって限定的ではない。したがって、本発明は、その発明の範囲内において、実施の形態を適宜、変形、省略することが可能である。 Although the present invention has been shown and described in detail, the above description is exemplary and not limiting in all embodiments. Therefore, in the present invention, the embodiments can be appropriately modified or omitted within the scope of the invention.

１ 塗工膜形成システム
１０ 塗工装置
１１ 塗工ノズル（第１塗工ヘッド）
１２ 塗工ノズル（第２塗工ヘッド）
１１１，１２１ 上流側先端部
１１２，１２２ 下流側先端部
１１ａ 吐出口（第１吐出口）
１２ａ 吐出口（第２吐出口）
３ 塗工液供給機構
３７ 供給配管
３１ ポンプ
３２，３４ 供給バルブ
３０，３７，３８ 供給配管
５ 基材
８０ 搬送機構（搬送部）
９０ 制御部
Ｄ１，Ｄ２ 間隔
Ｄ２Ｆ 間隔（第１間隔）
Ｄ２Ｒ 間隔（第２間隔） 1 Coating film forming system 10 Coating device 11 Coating nozzle (1st coating head)
12 Coating nozzle (2nd coating head)
111,121 Upstream tip 112, 122 Downstream tip 11a Discharge port (first discharge port)
12a Discharge port (second discharge port)
3 Coating liquid supply mechanism 37 Supply pipe 31 Pump 32,34 Supply valve 30, 37, 38 Supply pipe 5 Base material 80 Conveyance mechanism (conveyance part)
90 Control unit D1, D2 interval D2F interval (first interval)
D2R interval (second interval)

Claims (10)

長尺帯状の基材に対して間欠塗工する塗工装置であって、
前記基材を長手方向に搬送する搬送部と、
前記基材の一方面側に配置され、前記一方面に沿って前記長手方向に直交する方向に延びて前記一方面に対向するスリット状の第１吐出口を有する第１塗工ヘッドと、
前記第１塗工ヘッドよりも前記搬送部による前記基材の搬送方向の下流側において前記一方面側に配置され、前記一方面に沿って前記長手方向に直交する方向に延びて前記一方面に対向するスリット状の第２吐出口を有する第２塗工ヘッドと、
前記第１塗工ヘッドと前記第２塗工ヘッドとのそれぞれに対して塗工液を間欠的に供給することにより、前記第１塗工ヘッドと前記第２塗工ヘッドとのそれぞれから前記基材の前記一方面に向けて間欠的に前記塗工液を吐出させる塗工液供給機構と、
前記第１塗工ヘッドにより前記基材の前記一方面上に間欠的に形成される複数の塗工膜のうち互いに隣り合う塗工膜に挟まれた前記一方面上の複数の領域のそれぞれに、第２塗工ヘッドにより塗工膜を形成するように、前記塗工液供給機構を制御する制御部と、
を備え、
前記第１塗工ヘッドの前記第１吐出口と、前記一方面のうち前記第１吐出口が対向する第１部分との間隔よりも、第２塗工ヘッドの第２吐出口と、前記一方面のうち前記第２吐出口が対向する第２部分との間隔が長い、塗工装置。 It is a coating device that intermittently coats a long strip-shaped base material.
A transport unit that transports the base material in the longitudinal direction,
A first coating head arranged on one surface side of the base material and having a slit-shaped first discharge port extending along the one surface in a direction orthogonal to the longitudinal direction and facing the one surface.
It is arranged on the one side of the first coating head on the downstream side in the transport direction of the base material by the transport portion, extends along the one surface in a direction orthogonal to the longitudinal direction, and extends to the one surface. A second coating head having a slit-shaped second discharge port facing each other,
By intermittently supplying the coating liquid to each of the first coating head and the second coating head, the base is provided from each of the first coating head and the second coating head. A coating liquid supply mechanism that intermittently discharges the coating liquid toward the one side of the material,
Of the plurality of coating films intermittently formed on the one surface of the base material by the first coating head, each of the plurality of regions on the one surface sandwiched between the coating films adjacent to each other. , A control unit that controls the coating liquid supply mechanism so that the coating film is formed by the second coating head.
With
The second discharge port of the second coating head and the one said, rather than the distance between the first discharge port of the first coating head and the first portion of the one surface on which the first discharge port faces. A coating device having a long distance from a second portion of the direction facing which the second discharge port faces. 請求項１に記載の塗工装置であって、
前記第２塗工ヘッドは、その前記第２吐出口を規定する前記搬送方向の上流側先端部と下流側先端部とを含み、
前記上流側先端部と前記基材の前記一方面の前記第２部分との間隔と、前記下流側先端部と前記第２部分との間隔とが異なる、塗工装置。 The coating device according to claim 1.
The second coating head includes an upstream-side tip portion and a downstream-side tip portion in the transport direction that define the second discharge port.
A coating device in which the distance between the upstream tip portion and the second portion of the one surface of the base material and the distance between the downstream tip portion and the second portion are different. 請求項２に記載の塗工装置であって、
前記第２塗工ヘッドの前記上流側先端部が前記下流側先端部よりも前記基材の前記一方面に近い、塗工装置。 The coating device according to claim 2.
A coating device in which the upstream end portion of the second coating head is closer to the one surface of the base material than the downstream end portion. 請求項２に記載の塗工装置であって、
前記第２塗工ヘッドの前記下流側先端部が前記上流側先端部よりも前記基材の前記一方面に近い、塗工装置。 The coating device according to claim 2.
A coating device in which the downstream end portion of the second coating head is closer to the one surface of the base material than the upstream end portion. 長尺帯状の基材に対して間欠塗工する塗工方法であって、
前記基材を長手方向に搬送する搬送工程と、
前記基材の一方面側に配置され、前記一方面に沿って前記長手方向に直交する方向に延びて前記一方面に対向するスリット状の第１吐出口を有する第１塗工ヘッドと、前記第１塗工ヘッドよりも前記搬送工程における前記基材の搬送方向の下流側において前記一方面側に配置され、前記一方面に沿って前記長手方向に直交する方向に延びて前記一方面に対向するスリット状の第２吐出口を有する第２塗工ヘッドとのそれぞれから前記基材の前記一方面に向けて、前記搬送工程と並行して間欠的に塗工液を吐出する塗工液吐出工程と、
を備え、
前記塗工液吐出工程は、
前記第１塗工ヘッドにより前記基材の前記一方面上に間欠的に形成される複数の塗工膜のうち互いに隣り合う塗工膜に挟まれた前記一方面上の複数の領域のそれぞれに、第２塗工ヘッドにより塗工膜を形成するように、前記第１塗工ヘッドと前記第２塗工ヘッドとのそれぞれから前記塗工液を吐出する工程であり、
前記第１塗工ヘッドの前記第１吐出口と、前記一方面のうち前記第１吐出口が対向する第１部分との間隔よりも、第２塗工ヘッドの第２吐出口と、前記一方面のうち前記第２吐出口が対向する第２部分との間隔が長い、塗工方法。 It is a coating method that intermittently coats a long strip-shaped base material.
A transport process for transporting the base material in the longitudinal direction and
A first coating head which is arranged on one surface side of the base material and has a slit-shaped first discharge port which extends in a direction orthogonal to the longitudinal direction along the one surface and faces the one surface, and the said. It is arranged on the one side of the base material downstream of the first coating head in the transport direction of the base material, extends along the one surface in a direction orthogonal to the longitudinal direction, and faces the one surface. Coating liquid discharge that intermittently discharges the coating liquid from each of the second coating head having the slit-shaped second discharge port toward the one surface of the base material in parallel with the transfer process. Process and
With
The coating liquid discharge process is
Of the plurality of coating films intermittently formed on the one surface of the base material by the first coating head, each of the plurality of regions on the one surface sandwiched between the coating films adjacent to each other. , A step of discharging the coating liquid from each of the first coating head and the second coating head so that the coating film is formed by the second coating head.
The second discharge port of the second coating head and the one said, rather than the distance between the first discharge port of the first coating head and the first portion of the one surface on which the first discharge port faces. A coating method in which the distance between the direction and the second portion facing the second discharge port is long. 請求項５に記載の塗工方法であって、
前記第２塗工ヘッドは、その前記第２吐出口を規定する前記搬送方向の上流側先端部と下流側先端部とを含み、
前記上流側先端部と前記基材の前記一方面の前記第２部分との間隔と、前記下流側先端部と前記第２部分との間隔とが異なる、塗工方法。 The coating method according to claim 5.
The second coating head includes an upstream-side tip portion and a downstream-side tip portion in the transport direction that define the second discharge port.
A coating method in which the distance between the upstream tip portion and the second portion of the one surface of the base material and the distance between the downstream tip portion and the second portion are different. 請求項６に記載の塗工方法であって、
前記第２塗工ヘッドの前記上流側先端部が前記下流側先端部よりも前記基材の前記一方面に近い、塗工方法。 The coating method according to claim 6.
A coating method in which the upstream end portion of the second coating head is closer to the one surface of the base material than the downstream end portion. 請求項６に記載の塗工方法であって、
前記第２塗工ヘッドの前記下流側先端部が前記上流側先端部よりも前記基材の前記一方面に近い、塗工方法。 The coating method according to claim 6.
A coating method in which the downstream end portion of the second coating head is closer to the one surface of the base material than the upstream end portion. 請求項５に記載の塗工方法であって、
前記第２塗工ヘッドは、その前記第２吐出口を規定する前記搬送方向の上流側先端部と下流側先端部とを含み、
当該塗工方法は、
前記第２塗工ヘッドの前記上流側先端部と前記基材の前記一方面の前記第２部分との第１間隔と、前記第２塗工ヘッドの前記下流側先端部と前記第２部分との第２間隔との大小関係が前記塗工液の粘度に適した関係となるように、前記上流側先端部と前記下流側先端部との位置関係を、前記塗工液吐出工程に先立って設定する先端部設定工程、
をさらに備える、塗工方法。 The coating method according to claim 5.
The second coating head includes an upstream-side tip portion and a downstream-side tip portion in the transport direction that define the second discharge port.
The coating method is
The first distance between the upstream tip portion of the second coating head and the second portion of the one surface of the base material, and the downstream tip portion and the second portion of the second coating head. Prior to the coating liquid discharge step, the positional relationship between the upstream tip portion and the downstream tip portion is set so that the magnitude relationship with the second interval of the above is suitable for the viscosity of the coating liquid. Tip setting process to set,
A coating method that further prepares. 請求項９に記載の塗工方法であって、
前記先端部設定工程は、
前記塗工液の粘度が所定の基準値よりも低い場合には、前記上流側先端部に係る前記第１間隔が、前記下流側先端部に係る前記第２間隔よりも広くなるように前記上流側先端部と前記下流側先端部との位置関係を設定し、前記塗工液の粘度が前記基準値よりも高い場合には、前記第１間隔が前記第２間隔よりも広くなるように当該位置関係を設定する工程である、塗工方法。 The coating method according to claim 9.
The tip setting step is
When the viscosity of the coating liquid is lower than a predetermined reference value, the upstream portion so that the first interval related to the upstream tip portion becomes wider than the second interval related to the downstream tip portion. The positional relationship between the side tip and the downstream tip is set, and when the viscosity of the coating liquid is higher than the reference value, the first interval is wider than the second interval. A coating method that is a process of setting the positional relationship.
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