JP6373747B2 - Gravure coating equipment - Google Patents

Gravure coating equipment Download PDF

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JP6373747B2
JP6373747B2 JP2014249934A JP2014249934A JP6373747B2 JP 6373747 B2 JP6373747 B2 JP 6373747B2 JP 2014249934 A JP2014249934 A JP 2014249934A JP 2014249934 A JP2014249934 A JP 2014249934A JP 6373747 B2 JP6373747 B2 JP 6373747B2
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孝明 山根
孝明 山根
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株式会社ヒラノテクシード
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Description

本発明は、グラビア塗工装置に関するものである。   The present invention relates to a gravure coating apparatus.

従来、グラビア塗工装置においては、グラビアロールを液溜め部に浸潤させる方法やノズルをグラビアロールに押し当てる方法がある。これらの方法は、開放型の塗工液供給方法であり、この開放型以外にドクターブレードを用いた密閉型のグラビア塗工装置がある（例えば、特許文献１参照）。   Conventionally, in a gravure coating apparatus, there are a method of infiltrating a gravure roll into a liquid reservoir and a method of pressing a nozzle against the gravure roll. These methods are open-type coating liquid supply methods, and there is a sealed gravure coating apparatus using a doctor blade in addition to the open type (see, for example, Patent Document 1).

特開２０１４−１２４５５９号公報JP 2014-124559 A

上記開放型のグラビア塗工装置において、グラビアロールの版の中へ塗工液を浸潤させる場合、この浸潤状態は、塗工液の粘度などの物性による影響もあるが、グラビアロールの回転速度に依存する。すなわち、グラビアロールの回転速度が早くなることで、グラビアロールの版の中に塗工液を浸潤できなくなり、塗工量の不均一や液溜め部からの塗工液の排斥などの問題点があった。   In the above open gravure coating device, when the coating liquid is infiltrated into the gravure roll plate, this infiltration state is affected by physical properties such as the viscosity of the coating liquid, but the rotation speed of the gravure roll is also affected. Dependent. In other words, since the rotation speed of the gravure roll is increased, the coating liquid cannot be infiltrated into the gravure roll plate, and there are problems such as uneven coating amount and drainage of the coating liquid from the liquid reservoir. there were.

そこで、本発明は上記問題点に鑑み、グラビアロールの回転速度に関わらず、塗工量を均一にできる密閉型のグラビア塗工装置を提供することを目的とする。   In view of the above problems, an object of the present invention is to provide a sealed gravure coating apparatus capable of making the coating amount uniform regardless of the rotation speed of the gravure roll.

本発明は、前後方向に走行するウエブと回転しながら上面で接触するグラビアロールと、前記グラビアロールのノズルと、前記ノズルの上面の前後にそれぞれ立設されると共に幅方向に沿って設けられ、かつ、上端部で前記グラビアロールの下周面と接触する前後一対のドクターブレードと、前記ノズルの上面の左右に設けられ、前記グラビアロールの下周面の左右両側部を受ける左右一対のサイドシール部材と、前記ノズル内に幅方向に沿って設けられた第１液溜め部と、前記ノズル内に幅方向に沿って設けられると共に、前記第１液溜め部より上方に設けられ、かつ、上面が開口した第２液溜め部と、前記第１液溜め部と前記第２液溜め部とを接続するために幅方向に沿って設けられたスリットと、前記第１液溜め部に塗工液を給液する給液路と、前記第２液溜め部の開口した上端部から連続して設けられた円弧状の円弧面と、前記グラビアロールの下周面と前記円弧面と前記前後一対のドクターブレードと前記左右一対のサイドシール部材とで形成された第３液溜め部と、を有し、前記第２液溜め部の容積に前記第３液溜め部の容積を加えた容積が、前記第１液溜め部の容積と同じである、グラビア塗工装置である。 The present invention is a gravure roll that contacts on the upper surface while rotating with a web traveling in the front-rear direction, a nozzle of the gravure roll, and a front and rear of the upper surface of the nozzle and provided along the width direction, A pair of front and rear doctor blades that contact the lower peripheral surface of the gravure roll at the upper end, and a pair of left and right side seals that are provided on the left and right sides of the upper surface of the nozzle and receive the left and right side portions of the lower peripheral surface of the gravure roll A member, a first liquid reservoir provided in the nozzle along the width direction, and provided in the nozzle along the width direction, provided above the first liquid reservoir, and an upper surface A second liquid reservoir having an opening, a slit provided along the width direction to connect the first liquid reservoir and the second liquid reservoir, and a coating liquid in the first liquid reservoir Supply liquid A liquid path, an arcuate arc surface provided continuously from the open upper end of the second liquid reservoir, a lower peripheral surface of the gravure roll, the arc surface, the pair of front and rear doctor blades, and the left and right sides third liquid reservoir and, have a, the third liquid reservoir volume plus the volume of the volume of the second liquid reservoir is, the first reservoir formed by a pair of side seal member It is the same gravure coating device as the volume of .

本発明によれば、グラビアロールの回転速度に関わらずウエブに塗工液を均一に塗工できる。   According to the present invention, the coating liquid can be uniformly applied to the web regardless of the rotation speed of the gravure roll.

本実施形態の塗工装置の左右方向から見た縦断面図である。It is the longitudinal cross-sectional view seen from the left-right direction of the coating device of this embodiment. 図１におけるＡ−Ａ線断面図である。It is the sectional view on the AA line in FIG.

以下、本発明の一実施形態のグラビア塗工装置１０について図１と図２に基づいて説明する。このグラビア塗工装置１０は密閉型であって、フィルム、紙、金属箔などの長尺状のウエブＷの下面に塗工液をグラビア塗工する。   Hereinafter, the gravure coating apparatus 10 of one Embodiment of this invention is demonstrated based on FIG. 1 and FIG. The gravure coating apparatus 10 is a hermetically sealed type, and applies a coating liquid to the lower surface of a long web W such as a film, paper, or metal foil.

（１）グラビア塗工装置１０の構造
グラビア塗工装置１０の構造について図１と図２に基づいて説明する。グラビア塗工装置１０は、ウエブＷに塗工液を塗工するために回転駆動するグラビアロール１２と、グラビアロール１２の下周面に塗工液を供給するノズル１４とを有している。 (1) Structure of the gravure coating apparatus 10 The structure of the gravure coating apparatus 10 will be described with reference to FIGS. 1 and 2. The gravure coating apparatus 10 includes a gravure roll 12 that is rotationally driven to apply a coating liquid onto the web W, and a nozzle 14 that supplies the coating liquid to the lower peripheral surface of the gravure roll 12.

グラビアロール１２は、直径２０ｍｍ〜１００ｍｍ（例えば直径３０ｍｍ）であり、図１において例えば時計回りの方向に回転し、上面の一部で前後方向に走行するウエブＷの下面に接触してグラビア塗工を行う。   The gravure roll 12 has a diameter of 20 mm to 100 mm (for example, a diameter of 30 mm) and rotates in the clockwise direction in FIG. I do.

ノズル１４内部には第１液溜め部１６が形成されている。第１液溜め部１６は、グラビアロール１２の幅方向とほぼ同じ寸法に対応して幅方向に設けられている。第１液溜め部１６の左右方向から見た縦断面形状は、図１に示すようにほぼ長方形である。   A first liquid reservoir 16 is formed inside the nozzle 14. The first liquid reservoir 16 is provided in the width direction so as to correspond to substantially the same dimension as the width direction of the gravure roll 12. The vertical cross-sectional shape of the first liquid reservoir 16 viewed from the left-right direction is substantially rectangular as shown in FIG.

ノズル１４内部であって、第１液溜め部１６の上方には第２液溜め部１８が形成されている。第２液溜め部１８は、幅方向に延び、上面が開口している。第２液溜め部１８の左右方向から見た縦断面形状は、図１に示すようにほぼ長方形である。   A second liquid reservoir 18 is formed inside the nozzle 14 and above the first liquid reservoir 16. The second liquid reservoir 18 extends in the width direction and has an upper surface opened. The vertical cross-sectional shape of the second liquid reservoir 18 viewed from the left-right direction is substantially a rectangle as shown in FIG.

第２液溜め部１８の開口した上端部から前後方向に連続して延びる円弧状の円弧面３２が形成されている。   An arcuate arc surface 32 extending continuously in the front-rear direction from the open upper end of the second liquid reservoir 18 is formed.

ノズル１４内部であって、第１液溜め部１６の上部と第２液溜め部１８との間を接続するスリット２０が形成されている。図１に示すように、スリット２０は、第１液溜め部１６と第２液溜め部１８の前後方向の寸法よりも小さく形成されている。スリット２０の前後方向の寸法は２〜４０ｍｍであり、塗工液の粘度が高いほどこの前後方向の寸法を大きくする。また、第１液溜め部１６と第２液溜め部１８の距離に相当するスリット２０の高さ寸法は５０〜１５０ｍｍであり、グラビアロール１２の幅方向の寸法が長いほどこの高さ方向の寸法を大きくする。   A slit 20 is formed in the nozzle 14 to connect the upper portion of the first liquid reservoir 16 and the second liquid reservoir 18. As shown in FIG. 1, the slit 20 is formed to be smaller than the dimensions of the first liquid reservoir 16 and the second liquid reservoir 18 in the front-rear direction. The dimension of the slit 20 in the front-rear direction is 2 to 40 mm. The higher the viscosity of the coating liquid, the larger the dimension in the front-rear direction. The height dimension of the slit 20 corresponding to the distance between the first liquid reservoir 16 and the second liquid reservoir 18 is 50 to 150 mm. The longer the dimension in the width direction of the gravure roll 12, the greater the dimension in the height direction. Increase

ノズル１４の上面であって、かつ、グラビアロール１２の下周面に対応した位置に前後一対のドクターブレード２４，２６が設けられ、取り付け部材２２，２２によってノズル１４に固定されている。図１に示すように、前後一対のドクターブレード２４，２６は、ほぼ垂直方向に立設され、上端部でグラビアロール１２の下周面と接触し、グラビアロール１２の外周面にある不要な塗工液を掻き落とす。   A pair of front and rear doctor blades 24 and 26 are provided on the upper surface of the nozzle 14 and at a position corresponding to the lower peripheral surface of the gravure roll 12, and are fixed to the nozzle 14 by attachment members 22 and 22. As shown in FIG. 1, the pair of front and rear doctor blades 24, 26 are erected in a substantially vertical direction, are in contact with the lower peripheral surface of the gravure roll 12 at the upper end, and are disposed on the outer peripheral surface of the gravure roll 12. Scrape off the working fluid.

ノズル１４の上面の左右両側部には、図２に示すように、左右一対のサイドシール部材２８，３０が配され、左右一対のサイドシール部材２８，３０の上にグラビアロール１２が回転自在に配され、ノズル１４の左右両側部から塗工液が漏れ出ないようにシールしている。   As shown in FIG. 2, a pair of left and right side seal members 28, 30 are disposed on the left and right side portions of the upper surface of the nozzle 14, and the gravure roll 12 is rotatable on the pair of left and right side seal members 28, 30. It is arranged and sealed so that the coating liquid does not leak from the left and right sides of the nozzle 14.

グラビアロール１２の下周面、円弧面３２、前後一対のドクターブレード２４，２６、左右一対のサイドシール部材２８，３０の間の密閉された空間が、第３液溜め部３３となる。図１に示すように、第３液溜め部３３は円弧状に形成され、グラビアロール１２の下周面と円弧面３２の間がほぼ一定であって２〜３ｍｍの距離で形成されている。さらに、第２液溜め部１８の容積に第３液溜め部３３の容積を加えた容積が、第１液溜め部１６の容積と同じようになるように形成されている。図２に示すように、第１液溜め部１６とスリット２０の幅方向の寸法は同じであり、第２液溜め部１８と第３液溜め部３３の幅方向の寸法は、スリット２０の幅方向の寸法よりも大きく形成されている。すなわち、第１液溜め部１６とスリット２０の幅は、ノズル１４の両側部の位置で決定され、第２液溜め部１８と第３液溜め部３３は、左右両側壁２８，３０によって決定される。   A sealed space between the lower peripheral surface of the gravure roll 12, the circular arc surface 32, the pair of front and rear doctor blades 24 and 26, and the pair of left and right side seal members 28 and 30 serves as the third liquid reservoir 33. As shown in FIG. 1, the third liquid reservoir 33 is formed in an arc shape, and the distance between the lower peripheral surface of the gravure roll 12 and the arc surface 32 is substantially constant and is formed at a distance of 2 to 3 mm. Furthermore, the volume obtained by adding the volume of the third liquid reservoir 33 to the volume of the second liquid reservoir 18 is formed to be the same as the volume of the first liquid reservoir 16. As shown in FIG. 2, the widthwise dimensions of the first liquid reservoir 16 and the slit 20 are the same, and the widthwise dimensions of the second liquid reservoir 18 and the third liquid reservoir 33 are the width of the slit 20. It is formed larger than the dimension in the direction. That is, the widths of the first liquid reservoir 16 and the slit 20 are determined by the positions of both sides of the nozzle 14, and the second liquid reservoir 18 and the third liquid reservoir 33 are determined by the left and right side walls 28, 30. The

第１液溜め部１６の後面の中央には、塗工液を給液する給液路３４が開口している。給液路３４には、不図示の定量ポンプが接続され、不図示の塗工タンクから第１液溜め部１６に塗工液を単位時間当たり一定の量で圧送する。   In the center of the rear surface of the first liquid reservoir 16, a liquid supply path 34 for supplying the coating liquid is opened. A metering pump (not shown) is connected to the liquid supply path 34, and the coating liquid is pumped from the coating tank (not shown) to the first liquid reservoir 16 at a constant amount per unit time.

第２液溜め部１８の下部両側部（図２に示すようにスリット２０の両側）には、循環路３６が開口し、オーバーフローになりそうになった塗工液を不図示の塗工タンクに循環させる。   Circulating passages 36 are opened on both sides of the lower part of the second liquid reservoir 18 (both sides of the slit 20 as shown in FIG. 2), and the coating liquid that is about to overflow is applied to a coating tank (not shown). Circulate.

（２）グラビア塗工装置１０の動作状態
次に、グラビア塗工装置１０の動作状態について説明する。 (2) Operational state of gravure coating apparatus 10 Next, the operational state of the gravure coating apparatus 10 will be described.

水平で前後方向に走行するウエブＷは、第１押圧ロール３８と第２押圧ロール４０によってグラビアロール１２の上面に押圧して接触している。この場合に、グラビアロール１２の回転方向はウエブＷの走行方向と反対に回転させる。   The web W that runs horizontally in the front-rear direction is pressed against and contacts the upper surface of the gravure roll 12 by the first pressing roll 38 and the second pressing roll 40. In this case, the rotation direction of the gravure roll 12 is rotated opposite to the traveling direction of the web W.

不図示の定量ポンプが、第１液溜め部１６に塗工液を圧送する。   A metering pump (not shown) pumps the coating liquid to the first liquid reservoir 16.

第１液溜め部１６内の塗工液は、幅方向に広がりスリット２０に至る。   The coating liquid in the first liquid reservoir 16 spreads in the width direction and reaches the slit 20.

スリット２０内の塗工液は、幅方向にさらに万遍なく広がりつつ上昇して、第２液溜め部１８に至る。   The coating liquid in the slit 20 rises while spreading more evenly in the width direction and reaches the second liquid reservoir 18.

第２液溜め部１８内の塗工液は、幅方向にさらに広がって充填され、グラビアロール１２に対する塗工液の圧力を高くして、第３液溜め部３３に至る。   The coating liquid in the second liquid reservoir 18 is further spread and filled in the width direction, and the pressure of the coating liquid on the gravure roll 12 is increased to reach the third liquid reservoir 33.

第３液溜め部３３は、グラビアロール１２の下周面と同じ円弧状であり、かつ、同じ間隙寸法を有しているため、塗工液は第３液溜め部３３内でグラビアロール１２の外周面に刻まれている版に均一に幅方向に行き渡り浸潤する。   Since the third liquid reservoir 33 has the same arc shape as the lower peripheral surface of the gravure roll 12 and has the same gap size, the coating liquid is contained in the gravure roll 12 in the third liquid reservoir 33. It spreads and infiltrates uniformly in the width direction on the plate carved on the outer peripheral surface.

グラビアロール１２の外周面に浸潤した塗工液は、不要な量がドクターブレード２６によって掻き落とされ、グラビアロール１２の上面でウエブＷの下面にグラビア塗工される。   An unnecessary amount of the coating liquid infiltrated on the outer peripheral surface of the gravure roll 12 is scraped off by the doctor blade 26 and is applied to the lower surface of the web W on the upper surface of the gravure roll 12.

塗工が終わったグラビアロール１２は、不要な量がドクターブレード２４によって掻き落とされ、第３液溜め部３３の位置に再び回転する。   An unnecessary amount of the gravure roll 12 that has been coated is scraped off by the doctor blade 24 and rotates again to the position of the third liquid reservoir 33.

第２液溜め部１８、第３液溜め部３３からオーバーフローしようとする塗工液は循環路３６から不図示の塗工タンクに循環する。   The coating liquid that is about to overflow from the second liquid reservoir 18 and the third liquid reservoir 33 circulates from the circulation path 36 to a coating tank (not shown).

（３）効果
本実施形態のグラビア塗工装置１０であると、第１液溜め部１６とスリット２０とを通過させることで幅方向に均一にできる。また、第２液溜め部１８に充填することにより、グラビアロール１２に対する塗工液の圧力を高くできる。さらに、第３液溜め部３３でグラビアロール１２の版の中へ確実に浸潤させることができる。 (3) Effect The gravure coating apparatus 10 according to the present embodiment can be made uniform in the width direction by passing the first liquid reservoir 16 and the slit 20. Moreover, the pressure of the coating liquid with respect to the gravure roll 12 can be made high by filling the 2nd liquid reservoir part 18. FIG. Further, the third liquid reservoir 33 can surely infiltrate into the plate of the gravure roll 12.

これにより、グラビアロール１２の回転速度が速くなっても、従来のように塗工量の不均一や塗工液の排斥などが生じない。   As a result, even when the rotation speed of the gravure roll 12 is increased, the coating amount is not uniform and the coating liquid is not discharged as in the conventional case.

（４）変更例
本実施形態のグラビア塗工装置１０の第２液溜め部１８の循環路３６近傍に圧力センサを設け、第２液溜め部１８内の圧力変動を検出し、検出した圧力が、基準圧力の範囲内より高いときは、定量ポンプからの塗工液の供給量を減らし、基準圧力の範囲内より低いときは、塗工液の供給量を増やし、第２液溜め部１８内の圧力変動を基準圧力の範囲内に納めて、塗工状態を安定させる。 (4) Modification Example A pressure sensor is provided in the vicinity of the circulation path 36 of the second liquid reservoir 18 of the gravure coating apparatus 10 of the present embodiment to detect pressure fluctuations in the second liquid reservoir 18 and the detected pressure is When the pressure is higher than the range of the reference pressure, the supply amount of the coating liquid from the metering pump is decreased. When the pressure is lower than the range of the reference pressure, the supply amount of the coating liquid is increased and the second liquid reservoir 18 is filled. The pressure fluctuation is kept within the range of the reference pressure to stabilize the coating state.

上記では本発明の一実施形態を説明したが、この実施形態は、例として提示したものであり、発明の範囲を限定することは意図していない。これら新規な実施形態は、その他の様々な形態で実施されることが可能であり、発明の主旨を逸脱しない範囲で、種々の省略、置き換え、変更を行うことができる。これら実施形態やその変形は、発明の範囲や要旨に含まれるとともに、特許請求の範囲に記載された発明とその均等の範囲に含まれる。   Although one embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

１０・・・グラビア塗工装置、１２・・・グラビアロール、１４・・・ノズル、１６・・・第１液溜め部、１８・・・第２液溜め部、２０・・・スリット、２４・・・ドクターブレード、２６・・・ドクターブレード、２８・・・サイドシール部材、３０・・・サイドシール部材、３３・・・第３液溜め部 DESCRIPTION OF SYMBOLS 10 ... Gravure coating apparatus, 12 ... Gravure roll, 14 ... Nozzle, 16 ... 1st liquid reservoir part, 18 ... 2nd liquid reservoir part, 20 ... Slit, 24. .... Doctor blade, 26 ... Doctor blade, 28 ... Side seal member, 30 ... Side seal member, 33 ... Third liquid reservoir

Claims (8)

前後方向に走行するウエブと回転しながら上面で接触するグラビアロールと、
前記グラビアロールのノズルと、
前記ノズルの上面の前後にそれぞれ立設されると共に幅方向に沿って設けられ、かつ、上端部で前記グラビアロールの下周面と接触する前後一対のドクターブレードと、
前記ノズルの上面の左右に設けられ、前記グラビアロールの下周面の左右両側部を受ける左右一対のサイドシール部材と、
前記ノズル内に幅方向に沿って設けられた第１液溜め部と、
前記ノズル内に幅方向に沿って設けられると共に、前記第１液溜め部より上方に設けられ、かつ、上面が開口した第２液溜め部と、
前記第１液溜め部と前記第２液溜め部とを接続するために幅方向に沿って設けられたスリットと、
前記第１液溜め部に塗工液を給液する給液路と、
前記第２液溜め部の開口した上端部から連続して設けられた円弧状の円弧面と、
前記グラビアロールの下周面と前記円弧面と前記前後一対のドクターブレードと前記左右一対のサイドシール部材とで形成された第３液溜め部と、
を有し、
前記第２液溜め部の容積に前記第３液溜め部の容積を加えた容積が、前記第１液溜め部の容積と同じである、
グラビア塗工装置。 A gravure roll that contacts the upper surface while rotating with a web traveling in the front-rear direction;
A nozzle of the gravure roll;
A pair of front and rear doctor blades that are provided on the front and rear of the upper surface of the nozzle and are provided along the width direction, and that contact the lower peripheral surface of the gravure roll at the upper end,
A pair of left and right side seal members that are provided on the left and right of the upper surface of the nozzle and receive the left and right sides of the lower peripheral surface of the gravure roll;
A first liquid reservoir provided in the nozzle along the width direction;
A second liquid reservoir portion provided along the width direction in the nozzle, provided above the first liquid reservoir portion, and having an upper surface opened;
A slit provided along the width direction for connecting the first liquid reservoir and the second liquid reservoir;
A liquid supply passage for supplying a coating liquid to the first liquid reservoir;
An arcuate arc surface provided continuously from the open upper end of the second liquid reservoir;
A third liquid reservoir formed by a lower peripheral surface of the gravure roll, the arc surface, the pair of front and rear doctor blades, and the pair of left and right side seal members;
I have a,
The volume obtained by adding the volume of the third liquid reservoir to the volume of the second liquid reservoir is the same as the volume of the first liquid reservoir.
Gravure coating equipment. 前記スリットの前後方向の寸法が、前記第１液溜め部の前後方向の寸法と前記第２液溜め部の前後方向の寸法より小さい、
請求項１に記載のグラビア塗工装置。 The front-rear dimension of the slit is smaller than the front-rear dimension of the first liquid reservoir and the front-rear dimension of the second liquid reservoir,
The gravure coating apparatus according to claim 1 . 前記給液路が、前記第１液溜め部の幅方向の中央に開口している、
請求項２に記載のグラビア塗工装置。 The liquid supply path is open at the center in the width direction of the first liquid reservoir,
The gravure coating apparatus according to claim 2 . 前記第１液溜め部と前記スリットの幅方向の寸法が同じであり、前記第２液溜め部と前記第３液溜め部の幅方向の寸法が同じで、かつ、前記第２液溜め部と前記第３液溜め部の幅方向の寸法が前記スリットより大きい、
請求項３に記載のグラビア塗工装置。 The first liquid reservoir and the slit have the same widthwise dimension, the second liquid reservoir and the third liquid reservoir have the same widthwise dimension, and the second liquid reservoir A dimension in the width direction of the third liquid reservoir is larger than the slit;
The gravure coating apparatus according to claim 3 . 前記第２液溜め部の下部には、前記塗工液を外部に循環させるための循環路が設けられている、
請求項４に記載のグラビア塗工装置。 A circulation path for circulating the coating liquid to the outside is provided at the lower part of the second liquid reservoir.
The gravure coating apparatus according to claim 4 . 前記循環路が、前記スリットの左右両側部の外側にある前記第２液溜め部の左右両側部の下部に開口している、
請求項５に記載のグラビア塗工装置。 The circulation path is open to the lower part of the left and right sides of the second liquid reservoir located outside the left and right sides of the slit;
The gravure coating apparatus according to claim 5 . 前記グラビアロールは、直径２０〜１００ｍｍである、
請求項１に記載のグラビア塗工装置。 The gravure roll has a diameter of 20 to 100 mm.
The gravure coating apparatus according to claim 1. 前記第２液溜め部内に圧力センサを設けて前記第２液溜め部内の圧力変動を検出し、検出した圧力が、基準圧力の範囲内より高いときは、前記塗工液の供給量を減らし、前記基準圧力の範囲内より低いときは、前記塗工液の供給量を増やし、前記第２液溜め部１８内の圧力変動を前記基準圧力の範囲内に納める、
請求項１に記載のグラビア塗工装置。 A pressure sensor is provided in the second liquid reservoir to detect pressure fluctuations in the second liquid reservoir, and when the detected pressure is higher than the reference pressure range, the supply amount of the coating liquid is reduced, When lower than the range of the reference pressure, the supply amount of the coating liquid is increased, and the pressure fluctuation in the second liquid reservoir 18 is stored within the range of the reference pressure.
The gravure coating apparatus according to claim 1.
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