JP2014188449A - Intermittent coating apparatus and intermittent coating method - Google Patents

Intermittent coating apparatus and intermittent coating method Download PDF

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JP2014188449A
JP2014188449A JP2013066332A JP2013066332A JP2014188449A JP 2014188449 A JP2014188449 A JP 2014188449A JP 2013066332 A JP2013066332 A JP 2013066332A JP 2013066332 A JP2013066332 A JP 2013066332A JP 2014188449 A JP2014188449 A JP 2014188449A
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valve body
opening
valve
coating
supply
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JP6098282B2 (en
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Kazuya Shimoda
和哉 下田
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NEC Corp
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Abstract

PROBLEM TO BE SOLVED: To improve quality of a coated film by forming rising at the starting end and falling at the ending end of the coated film as abrupt respectively.SOLUTION: An intermittent coating apparatus comprises a coating head 7 which coats the surface of a sheet 4 with liquid 3 supplied from a supply tank 5, a supply valve 10 including a valve body 10a which opens and closes a coating passage 8a for supplying the liquid 3 from the supply tank 5 to the coating head 7, a first servo motor 11 which drives the valve body 10a, and a control device 12 which controls the first servo motor 11 so that the valve body 10a opens and closes the coating passage 8a intermittently. The control device 12 controls the valve body 10a so as to implement a first operation in which the valve body 10a is opened from the closing position for blocking the coating passage 8a to a fist opening position, a second operation in which the valve body 10a is opened to a second opening position that is larger than that of the first opening position with a slower speed than that of the first operation so as to keep constant the pressure for supplying the liquid 3 to the coating head 7 after the first operation, and a third operation in which the valve body 10a is closed form the second opening position to the closing position.

Description

本発明は、塗膜を間欠的に形成する間欠塗布装置及び間欠塗布方法に関する。   The present invention relates to an intermittent coating apparatus and an intermittent coating method for intermittently forming a coating film.

巻き出しロールから巻き取りロールに向かって連続的に搬送されるシートに対して、液体を塗布するための塗布装置が知られている。この種の塗布装置において、塗布する液体の供給の停止と、再開とを繰り返して、未塗布領域と塗布領域を断続的に繰り返して形成する間欠塗布装置がある(例えば特許文献1〜3)。   2. Description of the Related Art A coating device for applying a liquid to a sheet that is continuously conveyed from a winding roll toward a winding roll is known. In this type of coating apparatus, there is an intermittent coating apparatus that repeatedly stops and restarts the supply of the liquid to be coated and repeatedly forms an uncoated area and a coated area (for example, Patent Documents 1 to 3).

間欠塗布装置では、断続的に液体を塗布して形成される塗膜の膜厚を、塗膜の塗布領域内で均一にすることが求められている。特に、未塗布領域から、塗布領域が始まる塗膜の始端の領域では、塗膜の始端に盛り上がりを生じさせることなく始端の立ち上がりを急峻に形成することが課題である。加えて、塗布領域から、未塗布領域になる塗膜の終端の領域では、塗膜の終端の立ち下がりを急峻に形成することが課題である。   In the intermittent coating apparatus, it is required to make the film thickness of the coating film formed by intermittently applying the liquid uniform within the coating region of the coating film. In particular, in the area of the coating film starting from the uncoated area to the coated film starting point, it is a problem to form a steep rising edge without causing the coating film to swell. In addition, it is a problem to form a sharp trailing edge at the end of the coating film from the coating area to the end area of the coating film that becomes an uncoated area.

すなわち、間欠塗布装置は、塗膜の始端と終端の各側壁が、塗布面に対して垂直になるように塗膜を形成することが求められている。   That is, the intermittent coating apparatus is required to form a coating film such that the side walls at the beginning and end of the coating film are perpendicular to the coating surface.

特開2001−38276号公報(図2参照)JP 2001-38276 A (see FIG. 2) 特開2006−51407号公報(図2参照)JP 2006-51407 A (see FIG. 2) 特開2011−88138号公報(図3参照)JP 2011-88138 A (see FIG. 3)

上述した本発明に関連する間欠塗布装置について、供給弁の動作と塗膜との関係について図面を参照して説明する。   With respect to the intermittent application apparatus related to the present invention described above, the relationship between the operation of the supply valve and the coating film will be described with reference to the drawings.

図6〜図8に、本発明に関連する間欠塗布装置における、供給弁の動作と塗膜との関係について説明するための図を示す。各図6〜図8において、時間経過に伴う弁体の位置の変化、塗布ヘッドに供給される液体の、時間経過に伴う圧力の変化、時間経過に伴う膜厚の変化を示す。また、各図6〜図8において、供給弁の弁体の位置の変化を実線で示し、戻し弁の弁体の位置の変化を破線で示す。   The figure for demonstrating the relationship between the operation | movement of a supply valve and a coating film in the intermittent application apparatus relevant to this invention in FIGS. Each of FIGS. 6 to 8 shows a change in the position of the valve body with time, a change in pressure of the liquid supplied to the coating head, and a change in film thickness with time. 6 to 8, the change in the position of the valve element of the supply valve is indicated by a solid line, and the change in the position of the valve element of the return valve is indicated by a broken line.

本発明に関連する間欠塗布装置では、供給弁の弁体のストローク(移動量)が、図6に示すように、塗膜の塗り始めと塗り終わりの開閉動作を除いて、一定のストロークに保たれていた。まず、供給弁の弁体のストロークは、塗膜の終端の乱れや間欠塗布の未塗布領域に液ダレが生じない大きさに設定される。弁体のストロークは大きいほど、塗膜の終端における負圧が大きくなるので、塗膜の終端での乱れが小さくなり、未塗布領域に液ダレが生じない。   In the intermittent coating apparatus related to the present invention, the stroke (movement amount) of the valve body of the supply valve is kept constant as shown in FIG. 6 except for the opening and closing operations at the beginning and end of coating. It was leaning. First, the stroke of the valve body of the supply valve is set to such a size that the end of the coating film is not disturbed and liquid dripping does not occur in the intermittent application non-application area. The larger the stroke of the valve body, the larger the negative pressure at the end of the coating film, so that the turbulence at the end of the coating film becomes smaller and no dripping occurs in the uncoated area.

しかしながら、塗膜の終端における不都合を解消するためにストロークを大きくした場合、供給弁から液体が押し出される作用が大きくなり、図7に示すように、塗膜の始端の直後に盛り上がりが発生してしまう。   However, when the stroke is increased in order to eliminate the inconvenience at the end of the coating film, the action of liquid being pushed out from the supply valve is increased, and as shown in FIG. 7, a swell occurs immediately after the starting end of the coating film. End up.

塗膜の始端に盛り上がりが生じた場合、本発明に関連する間欠塗布装置では、図8に示すように、盛り上がりを抑えるために、供給弁を開く速度を遅くするしかなく、塗膜の始端の立ち上がりをなだらかに形成せざるを得なかった。そのため、図8に示すように、塗膜の始端における、シート4の搬送方向に対する立ち上がり長さLに関して制約を受ける塗布製品を製造することが困難であった。   When the swell occurs at the beginning of the coating film, the intermittent coating apparatus related to the present invention, as shown in FIG. 8, has only to slow the opening speed of the supply valve in order to suppress the swell, I had to form a gentle rise. Therefore, as shown in FIG. 8, it is difficult to manufacture a coated product that is restricted with respect to the rising length L with respect to the conveyance direction of the sheet 4 at the starting end of the coating film.

特許文献1には、エアシリンダを用いて供給弁を駆動した場合に、塗膜の始端に盛り上がりが生じることを抑制するための構成が開示されている。しかしながら、特許文献1では、エアシリンダを用いて駆動する場合における、塗膜の始端の盛り上がりを抑制する技術について開示されているが、塗膜の始端の立ち上がりを急峻に形成することについては考慮されていない。   Patent Document 1 discloses a configuration for suppressing the swell at the starting end of the coating film when the supply valve is driven using an air cylinder. However, Patent Document 1 discloses a technique for suppressing the rising of the starting edge of the coating film when driven using an air cylinder, but it is considered to form the rising edge of the starting edge of the coating film sharply. Not.

特許文献2には、弁体と、弁体を駆動する軸との間に隙間を設ける構成が開示されている。この構成により、特許文献2に記載の構成は、特許文献1の構成における、塗膜の盛り上がりを防ぐ作用を改善している。しかしながら、特許文献2に記載の構成においても、特許文献1と同様に、塗膜の始端の立ち上がりを急峻に形成することについては考慮されていない。   Patent Document 2 discloses a configuration in which a gap is provided between a valve body and a shaft that drives the valve body. With this configuration, the configuration described in Patent Document 2 improves the effect of preventing the swell of the coating film in the configuration of Patent Document 1. However, in the configuration described in Patent Document 2, as in Patent Document 1, it is not considered to form the leading edge of the coating film sharply.

特許文献3には、モーターを用いて任意に駆動される弁体を有する構成が開示されている。特許文献3に記載の構成では、形成された塗膜の形状の測定結果を弁体の駆動にフィードバックすることで、目標の膜厚になるように塗膜を形成している。しかしながら、特許文献3には、塗膜の立ち上がり、立ち下がりでの局所的な形状を修正するための技術について開示されているが、塗膜の終端の乱れや未塗布領域への液ダレを防止することについては考慮されていない。   Patent Document 3 discloses a configuration having a valve body that is arbitrarily driven using a motor. In the configuration described in Patent Document 3, the coating film is formed so as to have a target film thickness by feeding back the measurement result of the shape of the formed coating film to the driving of the valve body. However, Patent Document 3 discloses a technique for correcting the local shape at the rising and falling of the coating film, but prevents the end of the coating film from being disturbed and dripping into the uncoated area. It is not considered to do.

したがって、特許文献1〜3に記載の構成では、塗膜の立ち上がり及び立ち下がりをそれぞれ急峻に形成すると共に、塗膜の終端の乱れや未塗布領域への液ダレを防止することが困難であった。   Therefore, in the configurations described in Patent Documents 1 to 3, it is difficult to form the rising and falling edges of the coating film steeply and to prevent the end of the coating film from being disturbed and dripping into the uncoated area. It was.

そこで、本発明は、上記関連する技術の課題を解決することができる間欠塗布装置及び間欠塗布方法を提供することを目的とする。本発明の目的の一例は、塗膜の始端の立ち上がり及び終端の立ち下がりをそれぞれ急峻に形成することを可能にすると共に、塗膜の品質を向上することができる間欠塗布装置を提供することにある。   Then, an object of this invention is to provide the intermittent application apparatus and intermittent application method which can solve the subject of the said related technique. An example of an object of the present invention is to provide an intermittent coating apparatus capable of forming the leading edge and the trailing edge of a coating film steeply and improving the quality of the coating film. is there.

上述した目的を達成するため、本発明に係る間欠塗布装置は、塗料を供給する供給部と、供給部から供給された塗料を被塗布材の表面に沿って塗布する塗布部と、供給部から塗布部に塗料を供給するための流路を開閉する弁体を有する供給弁と、弁体を駆動する駆動部と、弁体が流路を間欠的に開閉するように駆動部を制御する制御部と、を備える。   In order to achieve the above-described object, an intermittent application apparatus according to the present invention includes a supply unit that supplies paint, an application unit that applies the paint supplied from the supply unit along the surface of the material to be applied, and a supply unit. A supply valve having a valve body that opens and closes a flow path for supplying paint to the application section, a drive section that drives the valve body, and a control that controls the drive section so that the valve body opens and closes the flow path intermittently A section.

制御部は、弁体が流路を塞ぐ閉塞位置から第1開放位置まで開く弁体を第1動作と、第1動作後に、塗布部に塗料を供給する圧力を一定に保つように第1動作の速度よりも遅い速度で、第1開放位置よりも大きな第2開放位置まで弁体を開く第2動作と、第2開放位置から閉塞位置まで弁体を閉じる第3動作と、を行うように弁体を制御する。   The control unit performs a first operation on the valve body that opens from the closed position where the valve body closes the flow path to the first open position, and a first operation so as to maintain a constant pressure for supplying the coating material to the application unit after the first operation. A second operation for opening the valve body to a second opening position larger than the first opening position and a third operation for closing the valve body from the second opening position to the closing position at a speed slower than the first opening position. Control the disc.

また、本発明に係る間欠塗布方法は、供給部から供給された塗料を被塗布材の表面に沿って間欠的に塗布する塗布方法において、
供給部から塗布部に塗料を供給するための流路を開閉する供給弁の弁体の開閉動作を、弁体が流路を塞ぐ閉塞位置から第1開放位置まで弁体を開く第1動作と、第1動作後、塗布部に塗料を供給する圧力を一定に保つように第1動作の速度よりも遅い速度で、第1開放位置よりも大きな第2開放位置まで弁体を開く第2動作と、第2開放位置から閉塞位置まで弁体を閉じる第3動作と、を行うように制御する。
Further, the intermittent application method according to the present invention is an application method for intermittently applying the paint supplied from the supply unit along the surface of the material to be applied.
The opening and closing operation of the valve body of the supply valve that opens and closes the flow path for supplying the coating material from the supply section to the application section is a first operation that opens the valve body from the closed position where the valve body closes the flow path to the first open position. After the first operation, the second operation of opening the valve body to a second opening position larger than the first opening position at a speed slower than the speed of the first operation so as to keep the pressure for supplying the coating material to the application unit constant. And a third operation for closing the valve body from the second open position to the closed position.

本発明によれば、間欠的に塗布される塗膜において、塗膜の始端の立ち上がり及び終端の立ち下がりをそれぞれ急峻に形成すると共に、塗膜の品質を向上することができる。   According to the present invention, in the coating film to be applied intermittently, the rising edge at the start and the falling edge at the end of the coating film can be formed steeply and the quality of the coating film can be improved.

実施形態の間欠塗布装置を示す模式図である。It is a schematic diagram which shows the intermittent application apparatus of embodiment. 実施形態の間欠塗布装置における要部を説明するための模式図である。It is a schematic diagram for demonstrating the principal part in the intermittent application apparatus of embodiment. 実施形態における供給弁の位置の変化を説明するための図である。It is a figure for demonstrating the change of the position of the supply valve in embodiment. 実施形態における供給弁の開閉動作と塗膜との関係について説明するための図である。It is a figure for demonstrating the relationship between the opening / closing operation | movement of a supply valve in an embodiment, and a coating film. 実施形態における、供給弁の開閉動作の他の例を説明するための図である。It is a figure for demonstrating the other example of the opening / closing operation | movement of a supply valve in embodiment. 本発明に関連する間欠塗布装置における、供給弁の動作と塗膜との関係について説明するための図である。It is a figure for demonstrating the relationship between the operation | movement of a supply valve, and a coating film in the intermittent application apparatus relevant to this invention. 本発明に関連する間欠塗布装置における、供給弁の動作と塗膜との関係について説明するための図である。It is a figure for demonstrating the relationship between the operation | movement of a supply valve, and a coating film in the intermittent application apparatus relevant to this invention. 本発明に関連する間欠塗布装置における、供給弁の動作と塗膜との関係について説明するための図である。It is a figure for demonstrating the relationship between the operation | movement of a supply valve, and a coating film in the intermittent application apparatus relevant to this invention.

以下、本発明の具体的な実施形態について、図面を参照して説明する。   Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

本実施形態の間欠塗布装置は、連続的に搬送される被塗布材としてのシートの表面に液体を塗布するために用いられるが、シートの平坦面に限定されるものではなく、例えば立体物の曲面に沿って塗布するために用いられてもよい。   The intermittent coating apparatus of the present embodiment is used to apply a liquid to the surface of a sheet as a material to be continuously conveyed, but is not limited to the flat surface of the sheet. It may be used to apply along a curved surface.

図1に、実施形態の間欠塗布装置の模式図を示す。図2に、実施形態の間欠塗布装置の要部の模式図を示す。   In FIG. 1, the schematic diagram of the intermittent application apparatus of embodiment is shown. In FIG. 2, the schematic diagram of the principal part of the intermittent application apparatus of embodiment is shown.

図1及び図2に示すように、実施形態の間欠塗布装置1は、塗料である液体3を供給する供給部としての供給タンク5と、供給タンク5から液体3を供給するためのポンプ6と、供給タンク5から供給された液体3を、被塗布材としてのシート4の表面に沿って塗布する塗布部としての塗布ヘッド7と、供給タンク5から塗布ヘッド7に塗料を供給するための流路8と、流路8を開閉する弁体10aを有する供給弁10と、供給弁10の弁体10aを駆動する駆動部としての第1サーボモータ11と、弁体10aが流路8を間欠的に開閉するように第1サーボモータ11を制御する制御部としての制御装置12と、を備えている。   As shown in FIGS. 1 and 2, the intermittent application apparatus 1 according to the embodiment includes a supply tank 5 as a supply unit that supplies a liquid 3 that is a paint, and a pump 6 that supplies the liquid 3 from the supply tank 5. The liquid 3 supplied from the supply tank 5 is applied along the surface of the sheet 4 as the material to be applied, the application head 7 as an application unit, and the flow for supplying the paint from the supply tank 5 to the application head 7. A path 8, a supply valve 10 having a valve body 10 a that opens and closes the flow path 8, a first servo motor 11 as a drive unit that drives the valve body 10 a of the supply valve 10, and the valve body 10 a intermittently pass the flow path 8. And a control device 12 as a control unit for controlling the first servomotor 11 so as to open and close automatically.

間欠塗布装置1が備える流路8は、供給タンク5から供給された液体3を塗布ヘッド7に供給するための塗布流路8aと、供給タンク5から供給された液体3を供給タンク5に返送するための戻し流路8bとを含んでいる。   The flow path 8 provided in the intermittent coating apparatus 1 returns the liquid 3 supplied from the supply tank 5 to the coating head 7 and the liquid 3 supplied from the supply tank 5 to the supply tank 5. And a return flow path 8b.

また、実施形態の間欠塗布装置1は、戻し流路8bを開閉する弁体13aを有する戻し弁13と、戻し弁13の弁体13aを駆動する第2サーボモータ14と、供給弁10から塗布ヘッド7に供給される液体3の圧力(以下、塗布圧力と称する。)を検出するための塗布圧力センサ16と、供給タンク5から供給される液体3の圧力(以下、供給圧力と称する。)を検出するための供給圧力センサ17と、を備えている。   Further, the intermittent application device 1 of the embodiment is applied from the return valve 13 having the valve body 13a for opening and closing the return flow path 8b, the second servo motor 14 for driving the valve body 13a of the return valve 13, and the supply valve 10. An application pressure sensor 16 for detecting the pressure of the liquid 3 supplied to the head 7 (hereinafter referred to as application pressure) and the pressure of the liquid 3 supplied from the supply tank 5 (hereinafter referred to as supply pressure). And a supply pressure sensor 17 for detecting.

シート4は、図示しないが、シート供給ロールから供給され、シート供給ロールからシート巻き取りロールに向かって所定の速度で連続的に搬送されている。   Although not shown, the sheet 4 is supplied from a sheet supply roll and is continuously conveyed from the sheet supply roll toward the sheet take-up roll at a predetermined speed.

そして、制御装置12は、第1サーボモータ11を制御することによって、供給弁10の弁体10aが塗布流路を塞ぐ閉塞位置から第1開放位置まで第1ストロークで弁体10aを開く第1動作と、第1動作後に、塗布圧力を一定に保つように第1動作の速度よりも遅い速度で、第1開放位置から、第1開放位置よりも大きな第2開放位置まで第2ストロークで弁体10aを開く第2動作と、第2開放位置から閉塞位置まで弁体10aを閉じる第3動作と、を行うように、供給弁10の弁体10aの開閉動作を制御する。   Then, the control device 12 controls the first servo motor 11 to open the valve body 10a in the first stroke from the closed position where the valve body 10a of the supply valve 10 blocks the application flow path to the first open position. After the first operation, the valve is operated with a second stroke from the first opening position to a second opening position larger than the first opening position at a speed slower than the speed of the first operation so as to keep the application pressure constant. The opening / closing operation of the valve body 10a of the supply valve 10 is controlled so that the second operation of opening the body 10a and the third operation of closing the valve body 10a from the second open position to the closed position are performed.

図3に、供給弁10の弁体10aの位置の変化を説明するための図を示す。図3において、(a)が弁体10aの位置を説明するための模式図を示し、(b)が時間経過に伴う弁体10aの位置の変化を示す。   FIG. 3 is a diagram for explaining a change in the position of the valve body 10a of the supply valve 10. FIG. 3A shows a schematic diagram for explaining the position of the valve body 10a, and FIG. 3B shows a change in the position of the valve body 10a with time.

図3(a)に示すように、本実施形態では、弁体10aが閉じられた位置を基準位置として、弁体10aの開放位置が設定されている。したがって、図3(b)に示すように、弁体10aは、時間経過に伴って所定の開放位置まで開放される。   As shown in FIG. 3A, in this embodiment, the open position of the valve body 10a is set with the position where the valve body 10a is closed as the reference position. Therefore, as shown in FIG. 3B, the valve body 10a is opened to a predetermined opening position with the passage of time.

ポンプ6は、流路8に配置されており、制御装置12と電気的に接続されている。   The pump 6 is disposed in the flow path 8 and is electrically connected to the control device 12.

塗布ヘッド7は、所定の速度で搬送されるシート4の表面に対向する位置に配置されており、シート4上に液体3を間欠的に吐出する。   The coating head 7 is disposed at a position facing the surface of the sheet 4 conveyed at a predetermined speed, and intermittently ejects the liquid 3 onto the sheet 4.

図2に示すように、供給弁10は、塗布ヘッド7に液体3を供給する塗布流路8aを開閉する弁体10aと、弁体10aによって開閉される開口を有する弁座10bと、弁体10a及び弁座10bが設けられたシリンダ10cと、を有して構成されている。   As shown in FIG. 2, the supply valve 10 includes a valve body 10a for opening and closing an application flow path 8a for supplying the liquid 3 to the application head 7, a valve seat 10b having an opening opened and closed by the valve body 10a, and a valve body. 10a and a cylinder 10c provided with a valve seat 10b.

供給弁10と同様に、戻し弁13は、供給タンク5に液体3を戻す戻し流路8bを開閉する弁体13aと、弁体13aによって開閉される開口を有する弁座13bと、弁体13a及び弁座13bが設けられたシリンダ13cと、を有して構成されている。   Similar to the supply valve 10, the return valve 13 includes a valve body 13a for opening and closing a return flow path 8b for returning the liquid 3 to the supply tank 5, a valve seat 13b having an opening opened and closed by the valve body 13a, and a valve body 13a. And a cylinder 13c provided with a valve seat 13b.

供給タンク5は、塗布ヘッド7に液体3を供給する流路8から分岐した戻し流路8bが連結されており、供給タンク5から塗布ヘッド7に供給された液体3の一部が循環されている。   The supply tank 5 is connected to a return flow path 8b branched from the flow path 8 for supplying the liquid 3 to the application head 7, and a part of the liquid 3 supplied from the supply tank 5 to the application head 7 is circulated. Yes.

第1サーボモータ11は、供給弁10に連結されており、制御装置12と電気的に接続されている。第2サーボモータ14は、戻し弁13に連結されており、制御装置12と電気的に接続されている。   The first servo motor 11 is coupled to the supply valve 10 and is electrically connected to the control device 12. The second servo motor 14 is coupled to the return valve 13 and is electrically connected to the control device 12.

図1に示すように、塗布圧力センサ16は、供給弁10と塗布ヘッド7との間の塗布流路8aに配されており、制御装置12に電気的に接続されている。供給圧力センサ17は、供給タンク5と供給弁10との間の戻し流路8bに配されており、制御装置12に電気的に接続されている。   As shown in FIG. 1, the application pressure sensor 16 is disposed in the application flow path 8 a between the supply valve 10 and the application head 7, and is electrically connected to the control device 12. The supply pressure sensor 17 is disposed in the return flow path 8 b between the supply tank 5 and the supply valve 10 and is electrically connected to the control device 12.

なお、供給弁10を開く第1動作での弁体10aの速度は、供給弁10を閉じる第3動作での弁体10aの速度とほぼ同程度に設定されている。   The speed of the valve body 10a in the first operation for opening the supply valve 10 is set to be approximately the same as the speed of the valve body 10a in the third operation for closing the supply valve 10.

以上のように構成された間欠塗布装置1について、シート4に間欠的に塗布する動作を説明する。図4に、実施形態における供給弁10の開閉動作と塗膜との関係を示す。図4において、供給弁10の弁体10aの位置の変化を実線で示し、戻し弁13の弁体13aの位置の変化を破線で示す。   The operation | movement which intermittently apply | coats to the sheet | seat 4 is demonstrated about the intermittent application apparatus 1 comprised as mentioned above. FIG. 4 shows the relationship between the opening / closing operation of the supply valve 10 and the coating film in the embodiment. In FIG. 4, a change in the position of the valve body 10a of the supply valve 10 is indicated by a solid line, and a change in the position of the valve body 13a of the return valve 13 is indicated by a broken line.

まず、間欠塗布装置1は、図4に示すように、第1動作で供給弁10の弁体10aを、閉塞位置から第1開放位置まで第1ストロークで開くことによって、塗膜の始端の立ち上がりが急峻に形成される。続いて、第1動作後に、第1動作での弁体10aの速度よりも遅い速度で、塗布圧力が変動せずに一定に保たれるように弁体10aを第2開放位置まで開く第2動作を行うことによって、塗膜の膜厚が一定に保たれる。   First, as shown in FIG. 4, the intermittent application apparatus 1 opens the valve body 10a of the supply valve 10 in the first operation from the closed position to the first open position by a first stroke, thereby rising the starting end of the coating film. Is formed steeply. Subsequently, after the first operation, the second opening of the valve body 10a to the second opening position is performed at a speed slower than the speed of the valve body 10a in the first operation so that the application pressure is kept constant without fluctuation. By performing the operation, the film thickness of the coating film is kept constant.

第2動作後、第2開放位置から、塗布流路8aを塞ぐ閉塞位置まで弁体10aを第2ストロークで閉じる第3動作を行うことによって、塗膜の終端の立ち下がりが急峻に形成される。そして、弁体10aを閉じてシート4に未塗布領域を形成した後、上述した第1、第2及び第3動作を含む弁体10aの開閉動作を行うことで、シート4に塗膜が間欠的に形成される。   After the second operation, the trailing end of the coating film is sharply formed by performing the third operation of closing the valve body 10a with the second stroke from the second opening position to the closing position for closing the coating flow path 8a. . And after closing the valve body 10a and forming the non-application area | region in the sheet | seat 4, a coating film is intermittently applied to the sheet | seat 4 by performing the opening / closing operation | movement of the valve body 10a including the 1st, 2nd, and 3rd operation | movement mentioned above. Formed.

なお、図4に示すように、供給弁10の開閉動作に同期して、戻し弁13の弁体13aは、供給弁10の開閉動作とは逆の開閉動作を行っている。また、戻し弁13を開く動作での弁体13aの移動量と、戻し弁体13を閉じる動作での弁体13aの移動量は同じにされており、弁体13aを開いた後、弁体13aを閉じるまで一定の開放位置に保たれている。   As shown in FIG. 4, in synchronization with the opening / closing operation of the supply valve 10, the valve body 13 a of the return valve 13 performs an opening / closing operation opposite to the opening / closing operation of the supply valve 10. Further, the amount of movement of the valve body 13a in the operation of opening the return valve 13 is the same as the amount of movement of the valve body 13a in the operation of closing the return valve body 13, and after opening the valve body 13a, the valve body It is kept in a certain open position until 13a is closed.

本実施形態では、弁体10aの第1開放位置が、弁体10aが閉じられた基準位置から1mmの位置に設定されており、弁体10aの第2開放位置が、基準位置から5mmの位置に設定されている。すなわち、本実施形態では、第1の動作で移動される弁体10aの第1開放位置が、第2の動作で移動される弁体10aの第2開放位置の1/5程度に設定されているが、これに限定されるものではなく、塗膜の始端に盛り上がりが生じない範囲内で、適切な開放位置に設定される。   In the present embodiment, the first opening position of the valve body 10a is set to a position 1 mm from the reference position where the valve body 10a is closed, and the second opening position of the valve body 10a is a position 5 mm from the reference position. Is set to That is, in the present embodiment, the first opening position of the valve body 10a moved by the first operation is set to about 1/5 of the second opening position of the valve body 10a moved by the second operation. However, the present invention is not limited to this, and is set to an appropriate open position within a range in which no swell occurs at the starting end of the coating film.

実施形態の間欠塗布装置1によって実際に塗膜を形成する場合には、塗膜の終端の立ち下がりを急峻に形成することができるように、第2動作において弁体10aを第2開放位置から閉じる第2ストロークを設定する。   When the coating film is actually formed by the intermittent coating apparatus 1 of the embodiment, the valve body 10a is moved from the second open position in the second operation so that the trailing edge of the coating film can be sharply formed. Set the second stroke to close.

続いて第1動作において弁体10aを開く第1ストロークと、第2動作において弁体10aを閉じる第2ストロークとを同じに設定した条件で塗膜を形成し、実際に形成された塗膜の始端の形状を確認する。その後、形成された塗膜の始端の形状を確認しながら、適宜、第1ストロークを小さくしながら、弁体10aを開く第1開放位置を適正に設定する。   Subsequently, a coating film is formed under the condition that the first stroke for opening the valve body 10a in the first operation and the second stroke for closing the valve body 10a in the second operation are set to be the same. Check the shape of the starting edge. Then, while confirming the shape of the starting end of the formed coating film, the first opening position for opening the valve body 10a is appropriately set while appropriately reducing the first stroke.

このとき、第1動作において第1ストロークで弁体10aを第1開放位置まで開く速度と、第2動作において第2ストロークで弁体10aを第2開放位置から閉じる速度は、ほぼ同程度に設定されており、塗膜の始端と終端を適正な形状に形成することが可能な速度範囲内において適切な速度に設定される。   At this time, the speed at which the valve body 10a is opened to the first opening position in the first stroke in the first operation and the speed at which the valve body 10a is closed from the second opening position in the second stroke in the second operation are set to be approximately the same. Therefore, an appropriate speed is set within a speed range in which the start and end of the coating film can be formed in an appropriate shape.

以上のように、第2動作では、塗布圧力の上昇を防ぐために、塗膜を一定の膜厚で形成する定常塗布時間の全てを使って、第1開放位置から第2開放位置まで弁体を開く動作が望ましい。しかし、第2動作での塗布圧力の上昇を防ぐことが可能であれば、必要に応じて、第2動作を、上述の定常塗布時間の一部の時間だけで行ってもよい。すなわち、制御装置12は、塗膜の膜厚を一定に形成することが可能であれば、第2動作と第3動作との間で、第2開放位置まで開いた弁体10aを第2開放位置に保つ別の動作を行うように制御を行ってもよい。   As described above, in the second operation, in order to prevent an increase in the coating pressure, the valve body is moved from the first opening position to the second opening position using all of the steady coating time for forming the coating film with a constant film thickness. Opening is desirable. However, if it is possible to prevent the application pressure from increasing in the second operation, the second operation may be performed only during a part of the above-described steady application time, if necessary. That is, if it is possible to form the coating film with a constant film thickness, the controller 12 opens the valve body 10a that has been opened to the second opening position between the second operation and the third operation. Control may be performed so as to perform another operation for maintaining the position.

上述したように、実施形態の間欠塗布装置1によれば、上述した第1、第2及び第3動作を含む開閉動作を行うように供給弁10を制御することによって、塗膜の始端の立ち上がり及び終端の立ち下がりを急峻にそれぞれ形成することを可能にし、塗膜の終端の乱れや未塗布領域への液ダレを防止することができる。その結果、実施形態によれば、塗膜の始端における膜厚が変動する領域(シート4の搬送方向に対する立ち上がり長さL)を小さくすることができ、塗膜が一定に形成される領域を増やし、塗膜の品質を向上することができる。   As described above, according to the intermittent coating apparatus 1 of the embodiment, the start-up of the coating film starts by controlling the supply valve 10 so as to perform the opening / closing operation including the first, second, and third operations described above. In addition, it is possible to form each of the trailing edges sharply, and to prevent the coating film from being disturbed at the terminal end and from dripping into the uncoated region. As a result, according to the embodiment, the region where the film thickness fluctuates at the starting end of the coating film (rise length L with respect to the conveyance direction of the sheet 4) can be reduced, and the region where the coating film is formed is increased. The quality of the coating film can be improved.

このように、塗膜の端部の膜厚が変動する領域が小さくなることによって、塗膜における膜厚が一定な領域が増えるので、塗布されたシート4を用いる製品の品質を向上することができる。加えて、塗膜の端部の膜厚が変動する領域は小さくなることによって、塗膜の膜厚の不安定な領域の廃棄を削減し、塗布されたシート4を用いる製品の製造コストを低減することができる。   Thus, since the area | region where the film thickness in a coating film becomes constant by reducing the area | region where the film thickness of the edge part of a coating film becomes small, the quality of the product using the apply | coated sheet | seat 4 can be improved. it can. In addition, by reducing the area where the film thickness at the edge of the coating film fluctuates, it is possible to reduce the disposal of areas where the film thickness of the coating film is unstable and reduce the manufacturing cost of products using the coated sheet 4 can do.

ところで、本実施形態の間欠塗布装置1では、塗膜の始端の立ち上がりが急峻に形成されるが、塗膜を形成する液体やその他の塗布条件によって、塗膜の始端に窪みが生じる可能性もある。図5に、実施形態における供給弁10の開閉動作の他の例を示す。図5において、供給弁10の弁体10aの位置の変化を実線で示し、戻し弁13の弁体13aの位置の変化を破線で示す。   By the way, in the intermittent application apparatus 1 of the present embodiment, the rising edge of the coating film is sharply formed, but depending on the liquid forming the coating film and other coating conditions, there is a possibility that a dent may be formed at the coating film starting edge. is there. FIG. 5 shows another example of the opening / closing operation of the supply valve 10 in the embodiment. In FIG. 5, the change of the position of the valve body 10a of the supply valve 10 is shown by a solid line, and the change of the position of the valve body 13a of the return valve 13 is shown by a broken line.

図5に示すように、塗膜の始端に窪みが形成された場合には、塗膜に窪みが形成される時間に対応する時間で、塗布圧力が低下することに起因している。そのため、塗膜に窪みが形成される時間に相当する時間では、第2動作における弁体10aを開く速度を相対的に速い速度で行うことによって、窪みが形成されることを解消することが可能になる。そして、窪みが形成される時間に相当する時間以降では、第2動作における弁体10aを開く動作を相対的に遅い速度で行うことによって、塗布圧力を一定に保つことによって、塗膜を一定の膜厚で形成することが可能になる。   As shown in FIG. 5, when a dent is formed at the starting end of the coating film, the coating pressure is reduced for a time corresponding to the time when the dent is formed in the coating film. Therefore, in the time corresponding to the time for which the depression is formed in the coating film, it is possible to eliminate the formation of the depression by performing the opening speed of the valve body 10a in the second operation at a relatively high speed. become. Then, after the time corresponding to the time when the depression is formed, the coating pressure is kept constant by keeping the coating pressure constant by performing the operation of opening the valve body 10a in the second operation at a relatively slow speed. It can be formed with a film thickness.

換言すれば、制御装置12は、第2動作を、第1動作の速度よりも遅い速度が段階的に小さくなるように変化させて制御を行ってもよく、第2動作が、弁体10aを複数の速度で第2開放位置まで開いてもよい。   In other words, the control device 12 may perform the control by changing the second operation so that the speed slower than the speed of the first operation becomes smaller in steps, and the second operation controls the valve body 10a. You may open to a 2nd open position at several speeds.

このように第2動作を制御することによって、上述と同様に、塗膜の始端の立ち上がり及び終端の立ち下がりを急峻にそれぞれ形成することを可能にし、塗膜の品質を向上することができる。   By controlling the second operation in this manner, it is possible to form the leading edge and the trailing edge of the coating film steeply, respectively, and improve the quality of the coating film as described above.

1 間欠塗布装置
3 液体
4 シート
5 供給タンク
7 塗布ヘッド
8 流路
8a 塗布流路
10 供給弁
10a 弁体
11 第1サーボモータ
12 制御装置
DESCRIPTION OF SYMBOLS 1 Intermittent application apparatus 3 Liquid 4 Sheet 5 Supply tank 7 Application head 8 Flow path 8a Application flow path 10 Supply valve 10a Valve element 11 First servo motor 12 Control apparatus

Claims (6)

塗料を供給する供給部と、
前記供給部から供給された塗料を被塗布材の表面に沿って塗布する塗布部と、
前記供給部から前記塗布部に塗料を供給するための流路を開閉する弁体を有する供給弁と、
前記弁体を駆動する駆動部と、
前記弁体が前記流路を間欠的に開閉するように前記駆動部を制御する制御部と、を備え、
前記制御部は、
前記弁体が前記流路を塞ぐ閉塞位置から第1開放位置まで前記弁体を開く第1動作と、
前記第1動作後に、前記塗布部に塗料を供給する圧力を一定に保つように前記第1動作の速度よりも遅い速度で、前記第1開放位置よりも大きな第2開放位置まで前記弁体を開く第2動作と、
前記第2開放位置から前記閉塞位置まで前記弁体を閉じる第3動作と、を行うように前記弁体を制御する、間欠塗布装置。
A supply section for supplying paint;
An application unit that applies the paint supplied from the supply unit along the surface of the material to be applied; and
A supply valve having a valve body for opening and closing a flow path for supplying paint from the supply unit to the application unit;
A drive unit for driving the valve body;
A control unit that controls the drive unit so that the valve element intermittently opens and closes the flow path,
The controller is
A first action of opening the valve body from a closed position where the valve body closes the flow path to a first open position;
After the first operation, the valve body is moved to a second opening position larger than the first opening position at a speed slower than the speed of the first operation so as to keep the pressure for supplying the coating material to the application unit constant. A second action to open,
An intermittent application device that controls the valve body to perform a third operation of closing the valve body from the second open position to the closed position.
前記制御部は、前記第2動作を、前記第1動作の速度よりも遅い速度が段階的に小さくなるように変化させて行う、請求項1に記載の間欠塗布装置。   2. The intermittent coating apparatus according to claim 1, wherein the control unit performs the second operation by changing the speed that is slower than the speed of the first operation in a stepwise manner. 前記制御部は、前記第2動作と前記第3動作との間で、前記第2開放位置まで開いた前記弁体を前記第2開放位置に保つように制御する、請求項1に記載の間欠塗布装置。   2. The intermittent control according to claim 1, wherein the control unit performs control so as to keep the valve body opened to the second opening position between the second operation and the third operation at the second opening position. Coating device. 供給部から供給された塗料を被塗布材の表面に沿って間欠的に塗布する塗布方法において、
前記供給部から前記塗布部に塗料を供給するための流路を開閉する供給弁の弁体の開閉動作を、
前記弁体が前記流路を塞ぐ閉塞位置から第1開放位置まで前記弁体を開く第1動作と、
第1動作後、前記塗布部に塗料を供給する圧力を一定に保つように前記第1動作の速度よりも遅い速度で、前記第1開放位置よりも大きな第2開放位置まで前記弁体を開く第2動作と、
前記第2開放位置から前記閉塞位置まで前記弁体を閉じる第3動作と、を行うように制御する、間欠塗布方法。
In the application method of intermittently applying the paint supplied from the supply unit along the surface of the material to be applied,
Opening and closing operation of a valve body of a supply valve that opens and closes a flow path for supplying paint from the supply unit to the application unit;
A first action of opening the valve body from a closed position where the valve body closes the flow path to a first open position;
After the first operation, the valve body is opened to a second opening position larger than the first opening position at a speed slower than the speed of the first operation so as to keep the pressure at which the coating material is supplied to the application unit constant. A second operation;
An intermittent application method in which control is performed to perform a third operation of closing the valve body from the second open position to the closed position.
前記第2動作を、前記第1動作の速度よりも遅い速度が段階的に小さくなるように変化させるように行う、請求項4に記載の間欠塗布方法。   The intermittent coating method according to claim 4, wherein the second operation is performed such that a speed slower than the speed of the first operation is changed stepwise. 前記第2動作と前記第3動作との間で、前記第2開放位置まで開いた前記弁体を前記第2開放位置に保つように制御する、請求項4に記載の間欠塗布方法。   5. The intermittent application method according to claim 4, wherein control is performed so that the valve body opened to the second release position is maintained at the second release position between the second action and the third action.
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