JP2014188426A - Intermittent coating apparatus and coating method - Google Patents

Intermittent coating apparatus and coating method Download PDF

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JP2014188426A
JP2014188426A JP2013065605A JP2013065605A JP2014188426A JP 2014188426 A JP2014188426 A JP 2014188426A JP 2013065605 A JP2013065605 A JP 2013065605A JP 2013065605 A JP2013065605 A JP 2013065605A JP 2014188426 A JP2014188426 A JP 2014188426A
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JP6163818B2 (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 provide an intermittent coating apparatus which solve a problem that a coating region having a uniform thickness is not formed without significantly increasing components, and to provide a coating method.SOLUTION: An intermittent coating apparatus includes: a die 2 which discharges a coating liquid 20; a pipeline 3 which supplies the coating liquid 20 to the die 2; a pump 4 which is provided in a middle portion of the pipeline 3 and pumps the coating liquid 20; a supply valve 5 provided at an area of the pipeline 3 which is located between the pump 4 and the die 2; a return pipeline 9 which recovers the coating liquid 20 to a tank 1; and a return valve 8 which is connected with the return pipeline 9. In at least the return valve 8, the opening/closing state may be arbitrarily controlled.

Description

本発明は、間欠塗布装置および塗布方法に関し、特に連続的に進行するシート状部材に対して液体を間欠的に塗布する間欠塗布装置および塗布方法に関する。   The present invention relates to an intermittent coating apparatus and a coating method, and more particularly to an intermittent coating apparatus and a coating method for intermittently applying a liquid to a sheet-like member that proceeds continuously.

間欠塗布装置とは、未塗布の領域と塗布の領域とを断続的に繰り返し作製する塗布装置である。   An intermittent coating apparatus is a coating apparatus that repeatedly produces an uncoated area and a coated area intermittently.

間欠塗布装置における課題は、断続的に塗布された液体の厚みを、塗布された領域内で均一とすることである。特に、未塗布領域から塗布領域となる塗り始めの領域では、盛り上がりのない急速な厚みの立ち上げが課題であり、塗布領域から未塗布領域となる塗り終わりの領域では、急速な厚みの立ち下げが課題である。このような課題を解決する技術が、特許文献１〜５に記載されている。   The problem in the intermittent application device is to make the thickness of the intermittently applied liquid uniform within the applied area. In particular, there is a problem of a rapid start-up of the thickness without any rise in the coating start area from the non-application area to the application area, and a rapid decrease in the thickness in the finish area from the application area to the non-application area. Is an issue. Techniques for solving such problems are described in Patent Documents 1 to 5.

図７は、特許文献１に示された間欠塗布装置の要部を示す概略図である。この間欠塗布装置１００は、基材Ｗに塗布液Ｍを塗布するダイＤと、ダイＤへ塗布液Ｍを圧送するポンプＰと、塗布液Ｍを貯えるタンクＴと、ダイＤとポンプＰとの間に設けられて開閉を交互に繰り返す断続バルブＶａと、ダイＤと断続バルブＶａの間のダイ側給液路１０１ａに接合された吸引・圧送手段ＳＶと、ポンプＰと断続バルブＶａの間からタンクＴへ延設した配管からなる戻し液路１０２と、戻し液路１０２の途中に配置された開閉弁Ｖｂと、吸引・圧送手段ＳＶ、断続バルブＶａおよび開閉弁Ｖｂを制御する制御装置１０５を備えている。さらに、リリーフ弁１０３を備えた逃がし路１０４を、ダイ側給液路１０１ａに連通することにより、吸引・圧送手段ＳＶから圧送された高圧の塗布液Ｍを、タンクＴへ逃がせるようにしている。この間欠塗布装置では、塗布域Ｃを形成するときは、断続バルブＶａを開きかつ開閉弁Ｖｂを閉じてダイＤから塗布液Ｍを基材Ｗに塗布すると共に、塗布域Ｃと塗布域Ｃとの間の非塗布域Ｇでは、断続バルブＶａを閉じかつ開閉弁Ｖｂを開いて戻し液路１０２を通してタンクＴへ塗布液Ｍを戻すように、制御装置１０５が制御する。これにより、塗布液Ｍを圧送するポンプＰの連続運転を確保している。   FIG. 7 is a schematic view showing a main part of the intermittent coating apparatus disclosed in Patent Document 1. As shown in FIG. The intermittent coating apparatus 100 includes a die D that applies a coating liquid M to a substrate W, a pump P that pumps the coating liquid M to the die D, a tank T that stores the coating liquid M, and a die D and a pump P. An intermittent valve Va provided between the die D and the intermittent valve Va, a suction / pressure feeding means SV joined to the die-side liquid supply path 101a, and the pump P and the intermittent valve Va. A return liquid path 102 made of a pipe extending to the tank T, an on-off valve Vb arranged in the middle of the return liquid path 102, and a control device 105 for controlling the suction / pressure feeding means SV, the intermittent valve Va and the on-off valve Vb. I have. Further, the relief passage 104 provided with the relief valve 103 is communicated with the die-side liquid supply passage 101a, so that the high-pressure coating liquid M pumped from the suction / pressure feeding means SV can be released to the tank T. . In this intermittent coating apparatus, when the coating area C is formed, the intermittent valve Va is opened and the on-off valve Vb is closed to apply the coating liquid M from the die D onto the substrate W. In the non-application region G between the control device 105 and the control device 105, the intermittent valve Va is closed and the on-off valve Vb is opened to return the application liquid M to the tank T through the return liquid path 102. Thereby, the continuous operation of the pump P which pumps the coating liquid M is ensured.

さらに、特許文献１は、断続バルブＶａとダイＤとの間に設置した吸引・圧送手段ＳＶによって、塗布域Ｃでの塗布液Ｍの、急速な厚みの立ち上げや急速な厚みの立ち下げを行うことを提案している。また、リリーフ弁１０３を備えた逃がし路１０４を設けることにより、吸引・圧送手段ＳＶから圧送されリリーフ弁１０３の設定圧力を越えている高圧の塗布液Ｍは逃がし路１０４を介してタンクＴへ逃がせるように構成している。   Further, Patent Document 1 discloses that a rapid increase in thickness and a decrease in thickness of the coating liquid M in the coating area C are performed by the suction / pressure feeding means SV installed between the intermittent valve Va and the die D. Propose to do. Further, by providing the escape passage 104 provided with the relief valve 103, the high-pressure coating liquid M that is pumped from the suction / pressure feeding means SV and exceeds the set pressure of the relief valve 103 is allowed to escape to the tank T through the relief passage 104. It is constituted so that.

図８は、特許文献２に示された間欠塗布装置の間欠供給用バルブを示す断面図である。特許文献２の間欠供給用バルブ２００は、シリンダー２０１と、弁座２０２と、弁体２０３と、ピストン２０４と、圧空室２０５ａ、２０５ｂなどを備えている。間欠供給用バルブ２００は、圧空室２０５ａ、２０５ｂに圧空を供給することによりピストン２０４を移動させるエアシリンダ構造を有する。特許文献２では、間欠供給用バルブ２００をエアシリンダで駆動した場合に発生する、塗り始めの盛り上がりを抑制する方法を提供している。   FIG. 8 is a cross-sectional view showing an intermittent supply valve of the intermittent application device disclosed in Patent Document 2. As shown in FIG. The intermittent supply valve 200 of Patent Document 2 includes a cylinder 201, a valve seat 202, a valve body 203, a piston 204, compressed air chambers 205a and 205b, and the like. The intermittent supply valve 200 has an air cylinder structure that moves the piston 204 by supplying compressed air to the compressed air chambers 205a and 205b. Patent Document 2 provides a method for suppressing the swell at the start of painting, which occurs when the intermittent supply valve 200 is driven by an air cylinder.

特許文献３では、スプレー時のみフィードバック制御を同期させるようにすることにより、実質噴射量を設定どおり管理できるようにした塗布流量フィードバック制御システムが提案されている。特許文献３では、スプレーＯＦＦ時にはフィードバック制御は中止され、塗料の供給は継続するが戻しバルブを開いて、循環通路を介して塗料供給ポンプに塗料を戻すことが提案されている。   Patent Document 3 proposes a coating flow rate feedback control system in which the actual injection amount can be managed as set by synchronizing the feedback control only during spraying. Patent Document 3 proposes that feedback control is stopped when the spray is OFF, and the supply of the paint is continued, but the return valve is opened and the paint is returned to the paint supply pump through the circulation passage.

特許文献４には、タンクとダイとをつなぐ液通路に仕切弁が設けられた間欠塗布装置が記載されており、仕切弁へ供給する制御電流を調整してその開度を制御することにより、塗布パターンの塗布開始点や終了点等の過渡的部分の形状をも精度良く形成することが提案されている。   Patent Document 4 describes an intermittent application device in which a gate valve is provided in a liquid passage connecting a tank and a die, and by adjusting a control current supplied to the gate valve and controlling its opening, It has been proposed that the shape of a transitional part such as the coating start point and end point of a coating pattern be formed with high accuracy.

特許文献５には、液体の吐出停止時には管路が送液用管から戻り用管に切り替えられる液体塗布装置が記載されており、液体戻し時の圧力と液体吐出時の圧力とが同一になるよう調節することにより、管路が切り替えられると直ちに液体がダイから吐出され、これによって塗布開始部および塗布終了部をシャープなエッジで塗布することが提案されている。   Patent Document 5 describes a liquid application device in which a pipe line is switched from a liquid supply pipe to a return pipe when liquid discharge is stopped, and the pressure at the time of liquid return and the pressure at the time of liquid discharge are the same. By adjusting in such a manner, it has been proposed that the liquid is discharged from the die as soon as the pipeline is switched, thereby applying the application start portion and the application end portion with sharp edges.

特開２００３−３４０３３８号公報JP 2003-340338 A 特開２００１−３８２７６号公報JP 2001-38276 A 特開２００６−２７２２１１号公報Japanese Patent Laid-Open No. 2006-272211 特開２０１１−８８１３８号公報JP 2011-88138 A 特開平１０−７６２０９号公報JP-A-10-76209

しかしながら、特許文献１の間欠塗布装置では、断続バルブＶａおよび開閉弁Ｖｂ以外に、ピストンのような吸引・圧送手段ＳＶを追加する必要があり、構成部品が増加し、故障原因が増加するという課題がある。   However, in the intermittent application device of Patent Document 1, it is necessary to add a suction / pressure feeding means SV such as a piston in addition to the intermittent valve Va and the on-off valve Vb, and the number of components increases and the cause of failure increases. There is.

特許文献２はエアシリンダ駆動の場合の盛り上がり抑制に効果的であるが、急速な塗布厚みの立ち上げについては、考慮されていない。   Patent Document 2 is effective in suppressing the swell when the air cylinder is driven, but does not take into account the rapid increase in coating thickness.

特許文献３乃至５で提案された塗布装置や塗布装置を用いても、ポンプを連続運転しつつ、構成部品をできるかぎり増加させないで、急速な塗布厚みの立ち上げは実現することができない。   Even if the coating apparatus and the coating apparatus proposed in Patent Documents 3 to 5 are used, rapid increase in coating thickness cannot be realized without increasing the number of components as much as possible while continuously operating the pump.

したがって、本発明の目的は、上述した課題である、構成部品の大幅な増加なしに、厚さが均一な塗布領域を形成することができないという課題を解決する間欠塗布装置および塗布方法を提供することにある。   Accordingly, an object of the present invention is to provide an intermittent coating apparatus and a coating method that solve the above-described problem that a coating region having a uniform thickness cannot be formed without a significant increase in the number of components. There is.

前記目的を達成するため、本発明に係る間欠塗布装置は、塗布液を貯えるタンクと、上記塗布液を吐出するダイと、上記ダイへ上記塗布液を供給する配管と、上記配管の途中に設けられ塗布液を圧送するポンプと、上記ポンプと上記ダイとの間の上記配管に設けられた供給弁と、上記ポンプと上記供給弁との間の上記配管の途中から分岐し、上記ダイから上記塗布液が吐出されていない期間に上記塗布液が通過して上記タンクへ上記塗布液を回収する戻し配管と、上記戻し配管の途中に設けられた戻し弁とを有し、
少なくとも上記戻し弁は開閉状態が任意に制御可能であり、
上記戻し弁は弁座と弁体とを備え、上記弁座を挟んで第１および第２の貫通孔を有し、
上記戻し弁の上記第１および第２の貫通孔は上記戻し弁が上記戻し配管に挿入されるように上記戻し配管に連通されていることを特徴とする。 In order to achieve the above object, an intermittent coating apparatus according to the present invention is provided in the middle of a tank for storing a coating liquid, a die for discharging the coating liquid, a pipe for supplying the coating liquid to the die, and the pipe. A pump for pumping the coating liquid, a supply valve provided in the pipe between the pump and the die, and a branch from the middle of the pipe between the pump and the supply valve. A return pipe through which the coating liquid passes and collects the coating liquid to the tank during a period when the coating liquid is not discharged, and a return valve provided in the middle of the return pipe,
At least the return valve can be arbitrarily controlled to open and close,
The return valve includes a valve seat and a valve body, and has first and second through holes sandwiching the valve seat,
The first and second through holes of the return valve are communicated with the return pipe so that the return valve is inserted into the return pipe.

本発明に係る他の間欠塗布装置は、塗布液を貯えるタンクと、上記塗布液を吐出するダイと、上記ダイへ上記塗布液を供給する配管と、上記配管の途中に設けられ上記塗布液を圧送するポンプと、上記ポンプと上記ダイとの間の上記配管に設けられた供給弁と、上記ダイから上記塗布液が吐出されていない期間に上記塗布液が通過して上記タンクへ上記塗布液を回収する戻し配管と、開閉状態が制御される戻し弁とを有し、
少なくとも上記戻し弁は開閉状態が任意に制御可能であり、
上記戻し弁は弁座の一方の側に第１および第２の貫通孔を他方の側に第３の貫通孔を有し、上記第１および第２の貫通孔は上記戻し弁が上記ポンプと上記供給弁との間の上記配管に挿入されるように上記配管に連通され、上記第３の貫通孔は上記戻し配管に連通されていることを特徴とする。 Another intermittent coating apparatus according to the present invention includes a tank for storing a coating liquid, a die for discharging the coating liquid, a pipe for supplying the coating liquid to the die, and the coating liquid provided in the middle of the pipe. A pump for pumping, a supply valve provided in the pipe between the pump and the die, and the coating liquid passing through the tank when the coating liquid is not discharged from the die. A return pipe for collecting the gas and a return valve whose open / close state is controlled,
At least the return valve can be arbitrarily controlled to open and close,
The return valve has first and second through holes on one side of the valve seat and a third through hole on the other side, and the first and second through holes are connected to the pump by the return valve. The third pipe is communicated with the pipe so as to be inserted into the pipe between the supply valve and the third through hole is communicated with the return pipe.

本発明に係るさらに他の間欠塗布装置は、塗布液を貯えるタンクと、上記塗布液を吐出するダイと、上記ダイへ上記塗布液を供給する配管と、上記配管の途中に設けられ上記塗布液を圧送するポンプと、上記ポンプと上記ダイとの間の上記配管に設けられた供給弁と、上記ダイから上記塗布液が吐出されていない期間に上記塗布液が通過して上記タンクへ上記塗布液を回収する戻し配管と、上記戻し配管の途中に設けられた戻し弁とを有し、
少なくとも上記戻し弁は開閉状態が任意に制御可能であり、
上記供給弁は弁座の一方の側に第１および第２の貫通孔を他方の側に第３の貫通孔を有し、上記第１および第３の貫通孔は上記供給弁が上記配管に挿入されるように上記配管に連通され、上記第２の貫通孔は上記戻し配管に連通されていることを特徴とする。 Still another intermittent coating apparatus according to the present invention includes a tank for storing a coating liquid, a die for discharging the coating liquid, a pipe for supplying the coating liquid to the die, and the coating liquid provided in the middle of the pipe. A pump for pressure-feeding, a supply valve provided in the piping between the pump and the die, and the coating liquid passing through the tank during a period when the coating liquid is not discharged from the die. A return pipe for recovering the liquid, and a return valve provided in the middle of the return pipe,
At least the return valve can be arbitrarily controlled to open and close,
The supply valve has first and second through holes on one side of the valve seat and a third through hole on the other side. The first and third through holes are connected to the pipe by the supply valve. The pipe is communicated with the pipe so as to be inserted, and the second through hole is communicated with the return pipe.

また、本発明に係る塗布方法は、全開状態の供給弁を通して塗布液を吐出し、上記供給弁を全閉状態とし、全開状態の戻し弁を通して上記塗布液を回収した後に上記戻し弁の開閉状態を制御し、その後に上記供給弁を全開状態とすることを特徴とする。   Further, the coating method according to the present invention discharges the coating liquid through the supply valve in the fully open state, sets the supply valve in the fully closed state, collects the coating liquid through the return valve in the fully open state, and then opens and closes the return valve. Then, the supply valve is fully opened.

本発明によれば、構成部品の大幅な増加を招かずに、厚さが均一な塗布領域を形成することができる。   According to the present invention, an application region having a uniform thickness can be formed without causing a significant increase in the number of components.

本発明の第１実施形態に係る間欠塗布装置を説明するための概略構成図である。It is a schematic block diagram for demonstrating the intermittent application apparatus which concerns on 1st Embodiment of this invention. 図１の供給弁５、戻し弁８および制御装置１０の細部を説明するための概略構成図である。It is a schematic block diagram for demonstrating the detail of the supply valve 5, the return valve 8, and the control apparatus 10 of FIG. （ａ）は供給弁５や戻し弁８の弁体の軌道を説明するための概略構成図であり、（ｂ）は（ａ）の弁体の軌道を時間に対する位置で表したグラフである。(A) is a schematic block diagram for demonstrating the trajectory of the valve body of the supply valve 5 or the return valve 8, (b) is the graph which represented the trajectory of the valve body of (a) by the position with respect to time. 本発明の実施形態に係る間欠塗布装置による塗布方法を説明するためのタイミングチャートである。It is a timing chart for demonstrating the coating method by the intermittent coating apparatus which concerns on embodiment of this invention. 本発明の第２実施形態に係る間欠塗布装置を説明するための概略構成図である。It is a schematic block diagram for demonstrating the intermittent application apparatus which concerns on 2nd Embodiment of this invention. 本発明の第３実施形態に係る間欠塗布装置を説明するための概略構成図である。It is a schematic block diagram for demonstrating the intermittent application apparatus which concerns on 3rd Embodiment of this invention. 特許文献１に示された間欠塗布装置の要部を示す概略図である。It is the schematic which shows the principal part of the intermittent application apparatus shown by patent document 1. FIG. 特許文献２に示された間欠塗布装置の間欠供給用バルブを示す断面図である。It is sectional drawing which shows the valve for intermittent supply of the intermittent application apparatus shown by patent document 2. FIG. 特許文献１の間欠塗布装置を用いた塗布方法を説明するためのタイミングチャートである。10 is a timing chart for explaining a coating method using the intermittent coating apparatus of Patent Document 1. 別の関連する塗布方法を説明するためのタイミングチャートである。It is a timing chart for demonstrating another related coating method.

本発明の好ましい実施形態について説明する前に、背景技術に記載した関連する間欠塗布装置を用いた塗布方法について、説明する。特許文献１には間欠塗布装置が示されているが、この装置の制御態様について具体的な記載がない。図９は、図７の間欠塗布装置を用いた塗布方法の一例を説明するためのタイミングチャートである。図１０は、別の関連する塗布方法を想定した、タイミングチャートである。   Before describing a preferred embodiment of the present invention, a coating method using a related intermittent coating apparatus described in the background art will be described. Although the intermittent application apparatus is shown by patent document 1, there is no specific description about the control aspect of this apparatus. FIG. 9 is a timing chart for explaining an example of a coating method using the intermittent coating apparatus of FIG. FIG. 10 is a timing chart assuming another related application method.

図７の間欠塗布装置を用いた塗布方法としては、次のものが考えられる。塗布期間では断続バルブＶａを開くと共に開閉弁Ｖｂを閉じるよう、制御装置１０５は弁***置を制御する。戻し期間では、断続バルブＶａを閉じると共に開閉弁Ｖｂを開くよう、制御装置１０５は弁***置を制御する。図９では、塗布期間の塗り終わりにおける急速な立ち下げを目的として、開閉弁Ｖｂのストロークを大きく、すなわち開閉弁Ｖｂの開度を大きくしている。開閉弁Ｖｂのストロークを大きくとは、例えば、５ｍｍとする。こうすると、塗布圧力の立ち下がりにおいて負圧が発生し、戻し期間での、ダイＤからの塗布液もれを防止することができる。しかしながら、戻し期間中に供給圧力が小さくなってしまうために、次の塗布期間の塗り始めでは急速な塗布圧力の立ち上がりが期待できなくなる。   The following can be considered as a coating method using the intermittent coating apparatus of FIG. During the application period, the control device 105 controls the position of the valve body so that the intermittent valve Va is opened and the on-off valve Vb is closed. In the return period, the control device 105 controls the valve body position so as to close the intermittent valve Va and open the on-off valve Vb. In FIG. 9, the stroke of the on-off valve Vb is increased, that is, the opening degree of the on-off valve Vb is increased for the purpose of rapid falling at the end of the application period. The large stroke of the on-off valve Vb is, for example, 5 mm. In this way, a negative pressure is generated at the fall of the coating pressure, and the coating liquid can be prevented from leaking from the die D during the return period. However, since the supply pressure is reduced during the return period, a rapid rise in the application pressure cannot be expected at the start of application in the next application period.

図７の間欠塗布装置を用いた別の関連する塗布方法としては、次のものも想定される。塗布期間では断続バルブＶａを開くと共に開閉弁Ｖｂを閉じるよう、制御装置１０５は弁***置を制御する。戻し期間では、断続バルブＶａを閉じると共に開閉弁Ｖｂを開くよう、制御装置１０５は弁***置を制御する。図１０では、塗布期間の塗り始めにおける塗布圧力の急速な立ち上がりを目的として、供給圧力を上げるために、開閉弁Ｖｂのストロークを小さく、すなわち開閉弁Ｖｂの開度を小さくしている。開閉弁Ｖｂのストロークを小さくとは、例えば、１ｍｍとする。こうすると、開閉弁Ｖｂの開度を小さくしたことにより、戻し期間中の開閉弁Ｖｂの圧力損失が大きくでき、供給圧力が上昇する。その結果、塗布期間の開始直後に急速に塗布圧力を立ち上げることができる。しかしながら、開閉弁Ｖｂの開度を小さくしたために、塗布期間の終了における塗布圧力の負圧が発生しなくなる。   As another related coating method using the intermittent coating apparatus of FIG. 7, the following is also assumed. During the application period, the control device 105 controls the position of the valve body so that the intermittent valve Va is opened and the on-off valve Vb is closed. In the return period, the control device 105 controls the valve body position so as to close the intermittent valve Va and open the on-off valve Vb. In FIG. 10, the stroke of the on-off valve Vb is reduced, that is, the opening degree of the on-off valve Vb is reduced in order to increase the supply pressure for the purpose of rapidly increasing the application pressure at the start of application in the application period. The small stroke of the on-off valve Vb is, for example, 1 mm. In this way, by reducing the opening degree of the on-off valve Vb, the pressure loss of the on-off valve Vb during the return period can be increased, and the supply pressure increases. As a result, the application pressure can be rapidly raised immediately after the start of the application period. However, since the opening degree of the on-off valve Vb is reduced, the negative pressure of the application pressure does not occur at the end of the application period.

現在主流の間欠塗布装置は、供給弁と戻し弁を有する構成が多く、供給弁や戻し弁の開度については、全開と全閉の二つの開度のみ定義している。このとき、供給弁は、全開と全閉の反転を繰り返す。供給弁が全開のとき戻し弁は全閉に、供給弁が全閉のとき戻し弁は全開にする。供給弁や戻し弁を動かす時間のタイミングは同時のことが多いが、動かすタイミングをずらすこともある。例えば、塗り始めの立ち上がり改善のために、供給弁を開く少し前に戻し弁を閉じるということもある。しかし、時間のタイミングをずらす方法は、供給弁あるいは戻し弁の弁体の動作時間を数１００マイクロ秒単位で厳密に管理する必要がある。しかし、開閉を繰り返す弁においては、連続使用時間に応じて摩擦や粘性抵抗など機械的特性が変化していく。弁の機械的特性が変化する中で、弁体が実際に動き出すタイミングを数１００マイクロ秒単位で厳密に管理することは困難である。   Many of the current mainstream intermittent application apparatuses have a supply valve and a return valve, and the opening degrees of the supply valve and the return valve are defined only as two openings, that is, fully open and fully closed. At this time, the supply valve repeats the reversal of full open and full close. When the supply valve is fully open, the return valve is fully closed, and when the supply valve is fully closed, the return valve is fully open. The timing of moving the supply valve and the return valve is often the same, but the timing of movement may be shifted. For example, the return valve may be closed shortly before the supply valve is opened to improve the start-up at the start of painting. However, in the method of shifting the timing of the time, it is necessary to strictly manage the operation time of the valve body of the supply valve or the return valve in units of several hundred microseconds. However, in a valve that repeatedly opens and closes, mechanical characteristics such as friction and viscous resistance change according to continuous use time. While the mechanical characteristics of the valve change, it is difficult to strictly manage the timing at which the valve body actually moves in units of several hundred microseconds.

次に、本発明の好ましい実施形態について、図面を参照しながら詳細に説明する。   Next, preferred embodiments of the present invention will be described in detail with reference to the drawings.

〔第１実施形態〕
初めに、本発明の第１の実施形態による間欠塗布装置および塗布方法について、図面を参照しながら説明する。図１は、本発明の第１実施形態に係る間欠塗布装置を説明するための概略構成図である。図２は、図１の供給弁５、戻し弁８および制御装置１０の細部を説明するための概略構成図である。図３（ａ）は供給弁５や戻し弁８の弁体の軌道を説明するための概略構成図であり、図３（ｂ）は図３（ａ）の弁体の軌道を時間に対する位置で表すグラフである。図４は、本発明の実施形態に係る間欠塗布装置による塗布方法を説明するためのタイミングチャートである。 [First Embodiment]
First, an intermittent coating apparatus and a coating method according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic configuration diagram for explaining an intermittent coating apparatus according to a first embodiment of the present invention. FIG. 2 is a schematic configuration diagram for explaining details of the supply valve 5, the return valve 8, and the control device 10 of FIG. 1. FIG. 3A is a schematic configuration diagram for explaining the trajectories of the valve bodies of the supply valve 5 and the return valve 8, and FIG. 3B shows the trajectory of the valve bodies of FIG. It is a graph to represent. FIG. 4 is a timing chart for explaining a coating method by the intermittent coating apparatus according to the embodiment of the present invention.

図１に示すように、本実施形態による間欠塗布装置は、塗布液２０を吐出するダイ２と、ダイ２へ塗布液２０を供給する配管３と、配管３の途中に設けられ塗布液２０を圧送するポンプ４と、ポンプ４とダイ２との間の上記配管３に設けられ、開閉状態が制御される供給弁５と、ダイ２から塗布液２０が吐出されていない期間に塗布液２０が通過する戻し配管９と、戻し配管９の途中に設けられ、開閉状態が制御される戻し弁８とを有している。本実施形態では、戻し配管９は配管３の途中から分岐するように、配管３に接続されている。ポンプ４は、間欠塗布装置が稼働している間、配管３の塗布液２０を圧送し続ける連続運転をしている。   As shown in FIG. 1, the intermittent coating apparatus according to the present embodiment includes a die 2 that discharges the coating liquid 20, a pipe 3 that supplies the coating liquid 20 to the die 2, and a coating liquid 20 that is provided in the middle of the pipe 3. The pump 4 that is pumped, the supply valve 5 that is provided in the pipe 3 between the pump 4 and the die 2 and whose open / close state is controlled, and the coating liquid 20 is discharged during the period when the coating liquid 20 is not discharged from the die 2. It has a return pipe 9 that passes through, and a return valve 8 that is provided in the middle of the return pipe 9 and whose open / close state is controlled. In the present embodiment, the return pipe 9 is connected to the pipe 3 so as to branch from the middle of the pipe 3. The pump 4 is in a continuous operation in which the coating liquid 20 in the pipe 3 is continuously fed while the intermittent coating apparatus is in operation.

さらに、間欠塗布装置は、塗布液２０を貯えるタンク１と、供給弁５とダイ２との間の配管３に設けられた塗布圧力センサー６と、ポンプ４と供給弁５との間の配管３に設けられた供給圧力センサー７と、供給弁５および戻し弁８を制御する制御装置１０とを有している。   Further, the intermittent application apparatus includes a tank 1 for storing the application liquid 20, an application pressure sensor 6 provided in a pipe 3 between the supply valve 5 and the die 2, and a pipe 3 between the pump 4 and the supply valve 5. And a control device 10 that controls the supply valve 5 and the return valve 8.

供給弁５と戻し弁８の細部について、説明する。図２に示すように、供給弁５は、シリンダー５ａ、弁体５ｂ、弁座５ｃ、および弁体５ｂを駆動するサーボモーター５ｄを有している。供給弁５の弁体５ｂは、サーボモーター５ｄと接続されており、任意の軌道で移動させることができる。弁体５ｂは制御装置１０に制御されたサーボモーター５ｄにより、シリンダー５ａの内部を移動し、これにより供給弁５は開閉状態が制御される。さらに、図２に示すように、戻し弁８は、シリンダー８ａ、弁体８ｂ、弁座８ｃ、および弁体８ｂを駆動するサーボモーター８ｄを有している。戻し弁８の弁体８ｂは、サーボモーター８ｄと接続されており、任意の軌道で移動させることができる。弁体８ｂは制御装置１０に制御されたサーボモーター８ｄにより、シリンダー８ａの内部を移動し、これにより戻し弁８は開閉状態が制御される。   Details of the supply valve 5 and the return valve 8 will be described. As shown in FIG. 2, the supply valve 5 includes a cylinder 5a, a valve body 5b, a valve seat 5c, and a servo motor 5d that drives the valve body 5b. The valve body 5b of the supply valve 5 is connected to the servo motor 5d and can be moved along an arbitrary track. The valve body 5b is moved inside the cylinder 5a by a servo motor 5d controlled by the control device 10, whereby the open / close state of the supply valve 5 is controlled. Further, as shown in FIG. 2, the return valve 8 includes a cylinder 8a, a valve body 8b, a valve seat 8c, and a servo motor 8d that drives the valve body 8b. The valve body 8b of the return valve 8 is connected to the servo motor 8d and can be moved along an arbitrary track. The valve body 8b is moved inside the cylinder 8a by the servo motor 8d controlled by the control device 10, and thereby the return valve 8 is controlled to be opened or closed.

ここで言う軌道とは、図３に示すように、指定した時間ｔにおいて指定した位置ｘを通過するように、弁体５ｂや弁体８ｂを駆動することである。位置ｘは、弁体５ｂ、８ｂが弁座５ｃ、８ｃに接触している位置を基準、すなわちｘ＝０とする。本実施形態においては、図３に示すように、弁体５ｂ、８ｂは直動方向に運動し、サーボモーター５ｄ、８ｄには直動のリニアモーターを使用することを想定している。軌道を設定可能であれば、回転モーターを直動に変換して弁体５ｂや弁体８ｂを駆動する構成としてもよい。   The trajectory referred to here is to drive the valve body 5b and the valve body 8b so as to pass a designated position x at a designated time t as shown in FIG. The position x is based on the position where the valve bodies 5b and 8b are in contact with the valve seats 5c and 8c, that is, x = 0. In this embodiment, as shown in FIG. 3, it is assumed that the valve bodies 5b and 8b move in the linear motion direction and linear servo motors are used for the servo motors 5d and 8d. As long as the trajectory can be set, the rotary motor may be converted into a linear motion to drive the valve body 5b and the valve body 8b.

図１に示すように、シート２１は一方向に送られており、断続的にダイ２から塗布液２０が吐出されることにより、シート２１上に断続的に塗布膜２２が形成される。   As shown in FIG. 1, the sheet 21 is fed in one direction, and the coating film 22 is intermittently formed on the sheet 21 by intermittently discharging the coating liquid 20 from the die 2.

本実施形態の間欠塗布装置では、戻し弁８は、開状態、閉状態、または開状態と閉状態との中間の半開状態に制御される。言い換えると、戻し弁８は、開度が大きい状態、開度がゼロの状態、または開度が大きい状態とゼロの状態との間の開度が小さい状態に、制御される。さらに言い換えると、戻し弁８は、弁体８ｂのストロークが大きい状態、弁体８ｂのストロークがゼロの状態、または弁体８ｂのストロークが大きい状態とゼロの状態との間のストロークが小さい状態に、制御される。   In the intermittent application device of this embodiment, the return valve 8 is controlled to an open state, a closed state, or a half-open state between the open state and the closed state. In other words, the return valve 8 is controlled in a state where the opening degree is large, a state where the opening degree is zero, or a state where the opening degree between the state where the opening degree is large and the zero state is small. In other words, the return valve 8 is in a state in which the stroke of the valve body 8b is large, a stroke of the valve body 8b is zero, or a stroke between a state in which the stroke of the valve body 8b is large and a state in which the stroke is small. Controlled.

制御装置１０は、供給弁５が閉状態のときには戻し弁８が開状態または半開状態になるよう、サーボモーター５ｄ、８ｄを制御する。さらに、制御装置１０は、供給弁５が閉状態から開状態に遷移する前に、戻し弁８が開状態から開状態と閉状態との間の半開状態になるよう、サーボモーター５ｄ、８ｄを制御する。   The control device 10 controls the servo motors 5d and 8d so that when the supply valve 5 is in a closed state, the return valve 8 is in an open state or a half-open state. Furthermore, before the supply valve 5 transitions from the closed state to the open state, the control device 10 turns the servo motors 5d and 8d so that the return valve 8 changes from the open state to a half-open state between the open state and the closed state. Control.

次に、図４のタイミングチャートを参照して、本実施形態による間欠塗布装置の動作および塗布方法について、説明する。供給弁５を閉状態から開状態に遷移させると共に、戻し弁８を閉状態に遷移させるように制御して、塗布期間となる。例えば、戻し弁８の開度が０ｍｍとなるように制御する。配管３を通じて、タンク１から供給弁５を通してダイ２へ塗布液２０が送られ、ダイ２から塗布液２０が吐出される。この塗布期間の間、供給弁５および戻し弁８の開閉状態が維持されて、一方向に送られているシート２１上に塗布膜２２が形成される。   Next, with reference to the timing chart of FIG. 4, the operation | movement and application | coating method of the intermittent application apparatus by this embodiment are demonstrated. The supply valve 5 is changed from the closed state to the open state, and the return valve 8 is controlled to be changed to the closed state, so that the application period is reached. For example, the opening degree of the return valve 8 is controlled to be 0 mm. Through the pipe 3, the coating liquid 20 is sent from the tank 1 to the die 2 through the supply valve 5, and the coating liquid 20 is discharged from the die 2. During this application period, the open / close state of the supply valve 5 and the return valve 8 is maintained, and the coating film 22 is formed on the sheet 21 fed in one direction.

次に、供給弁５を開状態から閉状態に遷移させると共に、戻し弁８を閉状態から開状態に遷移させるように制御して、戻し期間となる。例えば、戻し弁８の開度が０ｍｍから５ｍｍとなるように制御する。戻し期間では、ダイ２は塗布液２０の吐出を停止すると共に、配管３およびポンプ４を通じタンク１から圧送された塗布液２０は戻し弁８および戻し配管９を経由して、タンク１へ戻される。さらに、本実施形態では戻し期間において、供給弁５を閉状態に維持したまま、戻し弁８を開状態から開状態と閉状態との中間の半開状態へと遷移させるように、制御する。例えば、戻し弁８の開度が５ｍｍから１ｍｍとなるように制御する。これにより、次の塗布期間の前の戻し期間において、図４に示すように塗布液２０の供給圧力を高めることができる。   Next, the supply valve 5 is changed from the open state to the closed state, and the return valve 8 is controlled to change from the closed state to the open state, so that the return period is reached. For example, the opening degree of the return valve 8 is controlled to be 0 mm to 5 mm. In the return period, the die 2 stops the discharge of the coating liquid 20 and the coating liquid 20 pumped from the tank 1 through the pipe 3 and the pump 4 is returned to the tank 1 via the return valve 8 and the return pipe 9. . Further, in the present embodiment, in the return period, the control is performed so that the return valve 8 is changed from the open state to the half open state between the open state and the closed state while the supply valve 5 is maintained in the closed state. For example, the opening degree of the return valve 8 is controlled to be 5 mm to 1 mm. Thereby, in the return period before the next coating period, the supply pressure of the coating liquid 20 can be increased as shown in FIG.

次に、供給弁５を閉状態から開状態に遷移させると共に、戻し弁８を半開状態から閉状態に遷移させるように制御して、塗布期間となる。例えば、戻し弁８の開度が１ｍｍから０ｍｍとなるように制御する。こうして、再び、配管３および供給弁５を通して、タンク１からダイ２へ塗布液２０が送られ、ダイ２から塗布液２０が吐出される。塗布期間の間、供給弁５および戻し弁８の開閉状態が維持されて、シート２１上に塗布膜２２が形成される。   Next, the supply valve 5 is changed from the closed state to the open state, and the return valve 8 is controlled to change from the half-open state to the closed state, so that the application period is reached. For example, the opening degree of the return valve 8 is controlled to be 1 mm to 0 mm. Thus, the coating liquid 20 is again sent from the tank 1 to the die 2 through the pipe 3 and the supply valve 5, and the coating liquid 20 is discharged from the die 2. During the application period, the open / close state of the supply valve 5 and the return valve 8 is maintained, and the application film 22 is formed on the sheet 21.

次に、供給弁５を開状態から閉状態に遷移させると共に、戻し弁８を閉状態から開状態に遷移させるように制御して、再び戻し期間となる。すなわち、戻し弁８の開度が０ｍｍから５ｍｍとなるように制御する。   Next, the supply valve 5 is changed from the open state to the closed state, and the return valve 8 is controlled to change from the closed state to the open state, so that the return period starts again. That is, the opening degree of the return valve 8 is controlled so as to be 0 mm to 5 mm.

本実施形態による間欠塗布装置では、戻し弁８を、制御装置１０に制御されたサーボモーター８ｄで、開状態、閉状態、または開状態と閉状態との中間の半開状態に制御している。言い換えると、戻し弁８は、開度が大きい状態、開度がゼロの状態、または開度が大きい状態とゼロの状態との間の開度が小さい状態に、制御される。さらにまた、言い換えると、戻し弁８は、弁体８ｂのストロークが大きい状態、弁体８ｂのストロークがゼロの状態、または弁体８ｂのストロークが大きい状態とゼロの状態との間のストロークが小さい状態に、制御される。   In the intermittent application device according to the present embodiment, the return valve 8 is controlled by the servo motor 8d controlled by the control device 10 to an open state, a closed state, or a half-open state between the open state and the closed state. In other words, the return valve 8 is controlled in a state where the opening degree is large, a state where the opening degree is zero, or a state where the opening degree between the state where the opening degree is large and the zero state is small. Furthermore, in other words, the return valve 8 has a small stroke between the state in which the stroke of the valve body 8b is large, the stroke of the valve body 8b is zero, or the stroke of the valve body 8b is large and zero. Controlled to the state.

これまでの間欠塗布装置に新たな構成部品を追加することなく、戻し弁８の開度制御により、供給弁５を開状態とした直後に塗布圧力を急速に立ち上げることができる。塗布期間と戻し期間とを繰り返すことにより、シート２１上に断続的に塗布膜２２が形成され、塗布開始点等の過渡的部分の形状をも精度よく制御された塗布パターンを間欠的に形成することができる。   The application pressure can be rapidly raised immediately after the supply valve 5 is opened by controlling the opening of the return valve 8 without adding new components to the conventional intermittent application apparatus. By repeating the application period and the return period, the application film 22 is intermittently formed on the sheet 21, and an application pattern in which the shape of a transitional part such as an application start point is controlled accurately is formed intermittently. be able to.

特に、塗布液２０が戻し弁８を通過する戻し期間中に戻し弁８の開度を変更することが効果的である。本実施形態による間欠塗布装置によれば、塗り終わりに戻し弁８の開度を大きくして、塗布圧力を急速に立ち下げることができる。また、塗り始め前には戻し弁８の開度を小さくし、供給弁５前までの塗布液２０の供給圧力を高めておけるので、供給弁５を開いた直後に塗布圧力を急速に立ち上げることができる。その結果、厚さが均一な塗布領域を形成することができる。   In particular, it is effective to change the opening degree of the return valve 8 during the return period in which the coating liquid 20 passes through the return valve 8. According to the intermittent application apparatus according to the present embodiment, the application pressure can be rapidly lowered by increasing the opening degree of the return valve 8 at the end of application. Further, since the opening of the return valve 8 is reduced before the start of coating, and the supply pressure of the coating liquid 20 up to the supply valve 5 can be increased, the coating pressure is rapidly raised immediately after the supply valve 5 is opened. be able to. As a result, a coating region having a uniform thickness can be formed.

また本実施形態の塗布方法によれば、供給弁５を開いた直後に塗布圧力を急速に立ち上げることができる。その結果、塗布パターンの塗布開始点等の過渡的部分の形状をも精度よく形成することができる。   Further, according to the coating method of the present embodiment, the coating pressure can be rapidly raised immediately after the supply valve 5 is opened. As a result, the shape of a transitional part such as the application start point of the application pattern can be accurately formed.

〔第２実施形態〕
次に、本発明の第２実施形態に係る間欠塗布装置および塗布方法を説明する。図５は、本発明の第２実施形態に係る間欠塗布装置を説明するための概略構成図である。 [Second Embodiment]
Next, an intermittent coating apparatus and a coating method according to the second embodiment of the present invention will be described. FIG. 5 is a schematic configuration diagram for explaining an intermittent coating apparatus according to a second embodiment of the present invention.

本実施形態の間欠塗布装置は、図５に示すように、塗布液２０を吐出するダイ２と、ダイ２へ塗布液２０を供給する配管３と、配管３の途中に設けられ塗布液２０を圧送するポンプ４と、ポンプ４とダイ２との間の上記配管３に設けられ、開閉状態が制御される供給弁５と、ダイ２から塗布液２０が吐出されていない期間に塗布液２０が通過する戻し配管９と、供給弁５とポンプ４との間の配管３と戻し配管９との間に設けられ、開閉状態が制御される戻し弁８とを有している。すなわち、本実施形態の戻し弁８は、供給弁５とポンプ４との間の配管３の途中に設けられており、かつ配管３と戻し配管９との間に設けられている。ポンプ４は、間欠塗布装置が稼働している間、配管３の塗布液２０を圧送し続ける連続運転をしている。   As shown in FIG. 5, the intermittent coating apparatus of this embodiment includes a die 2 that discharges the coating liquid 20, a pipe 3 that supplies the coating liquid 20 to the die 2, and a coating liquid 20 that is provided in the middle of the pipe 3. The pump 4 that is pumped, the supply valve 5 that is provided in the pipe 3 between the pump 4 and the die 2 and whose open / close state is controlled, and the coating liquid 20 is discharged during the period when the coating liquid 20 is not discharged from the die 2. It has a return pipe 9 that passes through, and a return valve 8 that is provided between the return pipe 9 and the pipe 3 between the supply valve 5 and the pump 4 and whose open / close state is controlled. That is, the return valve 8 of the present embodiment is provided in the middle of the pipe 3 between the supply valve 5 and the pump 4, and is provided between the pipe 3 and the return pipe 9. The pump 4 is in a continuous operation in which the coating liquid 20 in the pipe 3 is continuously fed while the intermittent coating apparatus is in operation.

さらに、間欠塗布装置は、塗布液２０を貯えるタンク１と、供給弁５とダイ２との間の配管３に設けられた塗布圧力センサー６と、ポンプ４と戻し弁８との間の配管３に設けられた供給圧力センサー７と、供給弁５の弁体を駆動するサーボモーター５ｄと戻し弁８の弁体を駆動するサーボモーター８ｄとを制御する制御装置１０とを有している。   Further, the intermittent application apparatus includes a tank 1 for storing the application liquid 20, an application pressure sensor 6 provided in a pipe 3 between the supply valve 5 and the die 2, and a pipe 3 between the pump 4 and the return valve 8. And a control device 10 for controlling a servo motor 5d for driving the valve body of the supply valve 5 and a servo motor 8d for driving the valve body of the return valve 8.

供給弁５は、弁座を挟んで第１の貫通孔５ｉおよび第２の貫通孔５ｏを備えている。そして、供給弁５の第１の貫通孔５ｉおよび第２の貫通孔５ｏは供給弁５が配管３に挿入されるように、配管３に連通されている。さらに、戻し弁８は、弁座の一方の側に第１の貫通孔８ｉと第２の貫通孔８ｉとを、他方の側に第３の貫通孔８ｏを備えている。そして、戻し弁８の第１の貫通孔８ｉおよび第２の貫通孔８ｉが配管３に挿入されるように、配管３に連通されている。さらに、戻し弁８の第３の貫通孔８ｏが戻し配管９に連通されている。   The supply valve 5 includes a first through hole 5i and a second through hole 5o with a valve seat interposed therebetween. The first through hole 5 i and the second through hole 5 o of the supply valve 5 are communicated with the pipe 3 so that the supply valve 5 is inserted into the pipe 3. Furthermore, the return valve 8 includes a first through hole 8i and a second through hole 8i on one side of the valve seat, and a third through hole 8o on the other side. The first through hole 8 i and the second through hole 8 i of the return valve 8 are communicated with the pipe 3 so as to be inserted into the pipe 3. Further, the third through hole 8 o of the return valve 8 is communicated with the return pipe 9.

本実施形態では、塗布期間では戻し弁８の第１の貫通孔８ｉおよび第２の貫通孔８ｉ、供給弁５を通して、塗布液２０がダイ２へ送られて、シート２１に塗布膜２２が形成される。戻し期間では、戻し弁８の第１の貫通孔８ｉおよび第３の貫通孔８ｏを通して、戻し配管９へ塗布液２０が送られて、タンク１へ戻される。   In the present embodiment, during the coating period, the coating liquid 20 is sent to the die 2 through the first and second through holes 8 i and 8 i of the return valve 8 and the supply valve 5, and the coating film 22 is formed on the sheet 21. Is done. In the return period, the coating liquid 20 is sent to the return pipe 9 through the first through hole 8 i and the third through hole 8 o of the return valve 8 and returned to the tank 1.

本実施形態の間欠塗布装置および塗布方法においても、供給弁５および戻し弁８の開閉状態、開度、や各弁が備える弁体のストロークを、図４で示される第１の実施形態と同じようなタイミングで制御することにより、第１の実施形態と同様な効果がもたらされる。   Also in the intermittent coating apparatus and the coating method according to the present embodiment, the open / close state of the supply valve 5 and the return valve 8, the opening degree, and the stroke of the valve body included in each valve are the same as those in the first embodiment shown in FIG. By controlling at such timing, the same effect as that of the first embodiment is brought about.

〔第３実施形態〕
次に、本発明の第３実施形態に係る間欠塗布装置および塗布方法を説明する。図６は、本発明の第３実施形態に係る間欠塗布装置を説明するための概略構成図である。 [Third Embodiment]
Next, an intermittent coating apparatus and coating method according to a third embodiment of the present invention will be described. FIG. 6 is a schematic configuration diagram for explaining an intermittent coating apparatus according to a third embodiment of the present invention.

本実施形態の間欠塗布装置は、図６に示すように、塗布液２０を吐出するダイ２と、ダイ２へ塗布液２０を供給する配管３と、配管３の途中に設けられ塗布液２０を圧送するポンプ４と、ポンプ４とダイ２との間の上記配管３に設けられ、開閉状態が制御される供給弁５と、ダイ２から塗布液２０が吐出されていない期間に塗布液２０が通過する戻し配管９ａ、９ｂと、戻し配管９ａと戻し配管９ｂとの間に設けられ、開閉状態が制御される戻し弁８とを有している。すなわち、本実施形態の戻し弁８は、戻し配管９ａと戻し配管９ｂとから構成される戻し配管の途中に設けられている。ポンプ４は、間欠塗布装置が稼働している間、配管３の塗布液２０を圧送し続ける連続運転をしている。   As shown in FIG. 6, the intermittent coating apparatus of this embodiment includes a die 2 that discharges the coating liquid 20, a pipe 3 that supplies the coating liquid 20 to the die 2, and a coating liquid 20 that is provided in the middle of the pipe 3. The pump 4 that is pumped, the supply valve 5 that is provided in the pipe 3 between the pump 4 and the die 2 and whose open / close state is controlled, and the coating liquid 20 is discharged during the period when the coating liquid 20 is not discharged from the die 2. It has return pipes 9a and 9b that pass through, and a return valve 8 that is provided between the return pipe 9a and the return pipe 9b and whose open / close state is controlled. That is, the return valve 8 of the present embodiment is provided in the middle of the return pipe composed of the return pipe 9a and the return pipe 9b. The pump 4 is in a continuous operation in which the coating liquid 20 in the pipe 3 is continuously fed while the intermittent coating apparatus is in operation.

さらに、間欠塗布装置は、塗布液２０を貯えるタンク１と、供給弁５とダイ２との間の配管３に設けられた塗布圧力センサー６と、ポンプ４と供給弁５との間の配管３に設けられた供給圧力センサー７と、供給弁５の弁体を駆動するサーボモーター５ｄと戻し弁８の弁体を駆動するサーボモーター８ｄとを制御する制御装置１０とを有している。   Further, the intermittent application apparatus includes a tank 1 for storing the application liquid 20, an application pressure sensor 6 provided in a pipe 3 between the supply valve 5 and the die 2, and a pipe 3 between the pump 4 and the supply valve 5. And a control device 10 for controlling a servo motor 5d for driving the valve body of the supply valve 5 and a servo motor 8d for driving the valve body of the return valve 8.

供給弁５は、弁座の一方の側に第１の貫通孔５ｉと第２の貫通孔５ｉとを、他方の側に第３の貫通孔５ｏを備えている。そして、供給弁５の第１の貫通孔５ｉおよび第３の貫通孔５ｏは供給弁５が配管３に挿入されるように、配管３に連通されている。供給弁５の第２の貫通孔５ｉは、戻し配管９ｂに連通されている。さらに、戻し弁８は、弁座を挟んで第１の貫通孔８ｉおよび第２の貫通孔８ｏを備えている。そして、戻し弁８の第１の貫通孔８ｉおよび第２の貫通孔８ｏが戻し配管９ａと供給弁と連結した戻し配管９ｂとの間に挿入されるように、戻し配管９ａ、９ｂに連通されている。   The supply valve 5 includes a first through hole 5i and a second through hole 5i on one side of the valve seat, and a third through hole 5o on the other side. The first through hole 5 i and the third through hole 5 o of the supply valve 5 are communicated with the pipe 3 so that the supply valve 5 is inserted into the pipe 3. The second through hole 5i of the supply valve 5 communicates with the return pipe 9b. Further, the return valve 8 includes a first through hole 8i and a second through hole 8o with the valve seat interposed therebetween. The first through hole 8i and the second through hole 8o of the return valve 8 are communicated with the return pipes 9a and 9b so as to be inserted between the return pipe 9a and the return pipe 9b connected to the supply valve. ing.

本実施形態では、塗布期間では供給弁５の第１の貫通孔５ｉおよび第３の貫通孔５ｏを通して、塗布液２０がダイ２へ送られて、シート２１に塗布膜２２が形成される。戻し期間では、供給弁５の第１の貫通孔５ｉおよび第２の貫通孔５ｉ、戻し配管９ｂ、戻し弁８を通して、戻し配管９ａへ塗布液２０が送られて、塗布液２０はタンク１へ戻される。   In the present embodiment, the coating liquid 20 is sent to the die 2 through the first through hole 5 i and the third through hole 5 o of the supply valve 5 during the coating period, and the coating film 22 is formed on the sheet 21. In the return period, the coating liquid 20 is sent to the return pipe 9 a through the first through hole 5 i and the second through hole 5 i of the supply valve 5, the return pipe 9 b, and the return valve 8. Returned.

本実施形態の間欠塗布装置および塗布方法においても、供給弁５および戻し弁８の開閉状態、開度、および各弁が備える弁体のストロークを、図４で示される第１の実施形態と同じようなタイミングで制御することにより、第１の実施形態と同様な効果がもたらされる。   Also in the intermittent coating apparatus and the coating method of the present embodiment, the open / close state of the supply valve 5 and the return valve 8, the opening degree, and the stroke of the valve body included in each valve are the same as in the first embodiment shown in FIG. By controlling at such timing, the same effect as that of the first embodiment is brought about.

以上、本発明の好ましい実施形態について説明したが、本発明は様々な態様の間欠塗布装置に適用可能であり、本発明は必ずしも上述した実施形態に限定されるものではない。   As mentioned above, although preferable embodiment of this invention was described, this invention is applicable to the intermittent application apparatus of various aspects, and this invention is not necessarily limited to embodiment mentioned above.

また、上記の実施形態の一部又は全部は、新規な技術として以下のようにまとめられるが、本発明は必ずしもこれに限定されるものではない。
（付記１）塗布液を貯えるタンクと、前記塗布液を吐出するダイと、前記ダイへ前記塗布液を供給する配管と、前記配管の途中に設けられ塗布液を圧送するポンプと、前記ポンプと前記ダイとの間の前記配管に設けられた供給弁と、前記ポンプと前記供給弁との間の前記配管の途中から分岐し、前記ダイから前記塗布液が吐出されていない期間に前記塗布液が通過して前記タンクへ前記塗布液を回収する戻し配管と、前記戻し配管の途中に設けられた戻し弁とを有し、
少なくとも前記戻し弁は開閉状態が任意に制御可能であり、
前記戻し弁は弁座と弁体とを備え、前記弁座を挟んで第１および第２の貫通孔を有し、前記戻し弁の前記第１および第２の貫通孔は前記戻し弁が前記戻し配管に挿入されるように前記戻し配管に連通されていることを特徴とする間欠塗布装置。
（付記２）塗布液を貯えるタンクと、前記塗布液を吐出するダイと、前記ダイへ前記塗布液を供給する配管と、前記配管の途中に設けられ前記塗布液を圧送するポンプと、前記ポンプと前記ダイとの間の前記配管に設けられた供給弁と、前記ダイから前記塗布液が吐出されていない期間に前記塗布液が通過して前記タンクへ前記塗布液を回収する戻し配管と、開閉状態が制御される戻し弁とを有し、
少なくとも前記戻し弁は開閉状態が任意に制御可能であり、
前記戻し弁は弁座の一方の側に第１および第２の貫通孔を他方の側に第３の貫通孔を有し、前記第１および第２の貫通孔は前記戻し弁が前記ポンプと前記供給弁との間の前記配管に挿入されるように前記配管に連通され、前記第３の貫通孔は前記戻し配管に連通されることを特徴とする間欠塗布装置。
（付記３）塗布液を貯えるタンクと、前記塗布液を吐出するダイと、前記ダイへ前記塗布液を供給する配管と、前記配管の途中に設けられ前記塗布液を圧送するポンプと、前記ポンプと前記ダイとの間の前記配管に設けられた供給弁と、前記ダイから前記塗布液が吐出されていない期間に前記塗布液が通過して前記タンクへ前記塗布液を回収する戻し配管と、前記戻し配管の途中に設けられた戻し弁とを有し、
少なくとも前記戻し弁は開閉状態が任意に制御可能であり、
前記供給弁は弁座の一方の側に第１および第２の貫通孔を他方の側に第３の貫通孔を有し、前記第１および第３の貫通孔は前記供給弁が前記配管に挿入されるように前記配管に連通され、前記第２の貫通孔は前記戻し配管に連通されることを特徴とする間欠塗布装置。
（付記４）前記供給弁の弁体のストロークが略ゼロの状態からストロークが大きい状態に遷移する前に、前記戻し弁の弁体のストロークが大きい状態からストロークが略ゼロの状態との間のストロークが小さい状態になるよう制御されることを特徴とする、付記１乃至３のいずれか一項に記載の間欠塗布装置。
（付記５）全開状態の供給弁を通して塗布液を吐出し、前記供給弁を全閉状態とし、全開状態の戻し弁を通して前記塗布液を回収した後に前記戻し弁の開閉状態を制御し、その後に前記供給弁を全開状態とすることを特徴とする塗布方法。
（付記６）前記供給弁が閉状態のときには前記戻し弁が開状態になるよう制御され、
前記供給弁が閉状態から開状態に遷移する前に、前記戻し弁は開状態から開状態と閉状態との間の半開状態になるよう制御されることを特徴とする、付記５に記載の塗布方法。
（付記７）ダイから前記塗布液を吐出する塗布期間と、前記ダイから前記塗布液を吐出しない戻し期間とを交互に繰り返しながら塗布し、
前記戻し期間においては、前記戻し弁が開状態から開状態と閉状態との間の半開状態になるよう制御されるのに先立って、前記供給弁が開状態から閉状態になるよう制御されることを特徴とする、付記５に記載の塗布方法。
（付記８）前記供給弁の開度が略ゼロの状態から開度が大きい状態に遷移する前に、前記戻し弁は開度が大きい状態から開度が略ゼロの状態との間の中間状態になるよう制御されることを特徴とする、付記５に記載の塗布方法。
（付記９）ダイから前記塗布液を吐出する塗布期間と、前記ダイから前記塗布液を吐出しない戻し期間とを交互に繰り返しながら塗布し、
前記戻し期間においては、前記戻し弁の開度が大きい状態から開度が略ゼロの状態との間の中間状態になるよう制御されるのに先立って、前記供給弁の開度が大きい状態から開度が略ゼロの状態になるよう制御されることを特徴とする、付記５に記載の塗布方法。
（付記１０）前記供給弁の弁体のストロークが略ゼロの状態からストロークが大きい状態に遷移する前に、前記戻し弁の弁体のストロークが大きい状態からストロークが略ゼロの状態との間のストロークが小さい状態になるよう制御されることを特徴とする、付記５に記載の塗布方法。
（付記１１）ダイから前記塗布液を吐出する塗布期間と、前記ダイから前記塗布液を吐出しない戻し期間とを交互に繰り返しながら塗布し、
前記戻し期間においては、前記戻し弁の弁体のストロークが大きい状態からストロークが略ゼロの状態との間のストロークが小さい状態になるよう制御されるのに先立って、前記供給弁の弁体のストロークが大きい状態から略ゼロの状態になるよう制御されることを特徴とする、付記５に記載の塗布方法。 Moreover, although one part or all part of said embodiment is put together as follows as a novel technique, this invention is not necessarily limited to this.
(Supplementary note 1) A tank for storing a coating liquid, a die for discharging the coating liquid, a pipe for supplying the coating liquid to the die, a pump provided in the middle of the pipe for pumping the coating liquid, and the pump A supply valve provided in the pipe between the die and the pipe between the pump and the supply valve, and the coating liquid during a period when the coating liquid is not discharged from the die And a return pipe for collecting the coating liquid to the tank and a return valve provided in the middle of the return pipe,
At least the return valve can be arbitrarily controlled to open and close,
The return valve includes a valve seat and a valve body, and has first and second through holes sandwiching the valve seat, and the return valve includes the first and second through holes. An intermittent coating apparatus characterized by being connected to the return pipe so as to be inserted into the return pipe.
(Additional remark 2) The tank which stores a coating liquid, The die | dye which discharges the said coating liquid, The piping which supplies the said coating liquid to the said die, The pump which is provided in the middle of the said piping, and pumps the said coating liquid, The said pump And a supply valve provided in the pipe between the die and a return pipe through which the coating liquid passes and collects the coating liquid to the tank during a period when the coating liquid is not discharged from the die; A return valve whose open / close state is controlled,
At least the return valve can be arbitrarily controlled to open and close,
The return valve has first and second through holes on one side of the valve seat and a third through hole on the other side. The first and second through holes are connected to the pump by the return valve. An intermittent coating apparatus characterized in that the pipe is communicated with the pipe so as to be inserted into the pipe between the supply valve and the third through hole is communicated with the return pipe.
(Additional remark 3) The tank which stores a coating liquid, The die | dye which discharges the said coating liquid, The piping which supplies the said coating liquid to the said die, The pump which is provided in the middle of the said piping, and pumps the said coating liquid, The said pump And a supply valve provided in the pipe between the die and a return pipe through which the coating liquid passes and collects the coating liquid to the tank during a period when the coating liquid is not discharged from the die; A return valve provided in the middle of the return pipe,
At least the return valve can be arbitrarily controlled to open and close,
The supply valve has first and second through holes on one side of the valve seat and a third through hole on the other side. The first and third through holes are connected to the pipe by the supply valve. An intermittent coating apparatus characterized in that it is communicated with the pipe so as to be inserted, and the second through hole is communicated with the return pipe.
(Appendix 4) Before the transition of the valve body of the supply valve from the substantially zero state to the large stroke state, the stroke between the large valve body of the return valve and the state of substantially zero stroke The intermittent coating apparatus according to any one of appendices 1 to 3, wherein the stroke is controlled to be in a small state.
(Supplementary note 5) Discharge the coating liquid through the supply valve in the fully open state, place the supply valve in the fully closed state, and after collecting the coating liquid through the return valve in the fully open state, control the open / close state of the return valve, An application method, wherein the supply valve is fully opened.
(Appendix 6) When the supply valve is closed, the return valve is controlled to be open,
The supplementary note 5, wherein the return valve is controlled to be in a half-open state between the open state and the closed state before the supply valve transitions from the closed state to the open state. Application method.
(Appendix 7) Applying while alternately repeating the application period of discharging the coating liquid from the die and the return period of not discharging the coating liquid from the die,
In the return period, the supply valve is controlled from the open state to the closed state before the return valve is controlled from the open state to a half-open state between the open state and the closed state. The coating method according to appendix 5, wherein:
(Appendix 8) Before the supply valve opens from a substantially zero state to a large opening state, the return valve is in an intermediate state between a large opening state and a substantially zero opening state. The coating method according to appendix 5, wherein the coating method is controlled to be
(Appendix 9) Applying while alternately repeating the application period of discharging the coating liquid from the die and the return period of not discharging the coating liquid from the die,
In the return period, prior to being controlled to be in an intermediate state between a state where the opening degree of the return valve is large and a state where the opening degree is substantially zero, from a state where the opening degree of the supply valve is large The coating method according to appendix 5, wherein the opening degree is controlled to be substantially zero.
(Appendix 10) Before the transition of the valve body of the supply valve from the substantially zero state to the large stroke state, the stroke of the return valve from the large stroke state to the substantially zero stroke state The coating method according to appendix 5, wherein the stroke is controlled to be in a small state.
(Appendix 11) Applying while alternately repeating the application period of discharging the coating liquid from the die and the return period of not discharging the coating liquid from the die,
In the return period, prior to being controlled so that the stroke between the state in which the valve body of the return valve is large and the state in which the stroke is substantially zero is small, the valve body of the supply valve is 6. The coating method according to appendix 5, wherein the application is controlled so that the stroke becomes a substantially zero state from a large state.

１ タンク
２ ダイ
３ 配管
４ ポンプ
５ 供給弁
５ａ、８ａ シリンダー
５ｂ、８ｂ 弁体
５ｃ、８ｃ 弁座
５ｄ、８ｄ サーボモーター
５ｉ、５ｏ、８ｉ、８ｏ 貫通孔
６ 塗布圧力センサー
７ 供給圧力センサー
８ 戻し弁
９、９ａ、９ｂ 戻し配管
１０ 制御装置
２０ 塗布液
２１ シート
２２ 塗布膜 DESCRIPTION OF SYMBOLS 1 Tank 2 Die 3 Piping 4 Pump 5 Supply valve 5a, 8a Cylinder 5b, 8b Valve body 5c, 8c Valve seat 5d, 8d Servo motor 5i, 5o, 8i, 8o Through-hole 6 Coating pressure sensor 7 Supply pressure sensor 8 Return valve 9, 9a, 9b Return pipe 10 Control device 20 Coating liquid 21 Sheet 22 Coating film

Claims (10)

塗布液を貯えるタンクと、前記塗布液を吐出するダイと、前記ダイへ前記塗布液を供給する配管と、前記配管の途中に設けられ前記塗布液を圧送するポンプと、前記ポンプと前記ダイとの間の前記配管に設けられた供給弁と、前記ポンプと前記供給弁との間の前記配管の途中から分岐し、前記ダイから前記塗布液が吐出されていない期間に前記塗布液が通過して前記タンクへ前記塗布液を回収する戻し配管と、前記戻し配管の途中に設けられた戻し弁とを有し、
少なくとも前記戻し弁は開閉状態が任意に制御可能であり、
前記戻し弁は弁座と弁体とを備え、前記弁座を挟んで第１および第２の貫通孔を有し、前記戻し弁の前記第１および第２の貫通孔は前記戻し弁が前記戻し配管に挿入されるように前記戻し配管に連通されていることを特徴とする間欠塗布装置。 A tank for storing a coating liquid; a die for discharging the coating liquid; a pipe for supplying the coating liquid to the die; a pump provided in the middle of the pipe for pumping the coating liquid; and the pump and the die A supply valve provided in the pipe between the pump and the pipe between the pump and the supply valve, and the coating liquid passes during a period in which the coating liquid is not discharged from the die. A return pipe for collecting the coating liquid into the tank, and a return valve provided in the return pipe,
At least the return valve can be arbitrarily controlled to open and close,
The return valve includes a valve seat and a valve body, and has first and second through holes sandwiching the valve seat, and the return valve includes the first and second through holes. An intermittent coating apparatus characterized by being connected to the return pipe so as to be inserted into the return pipe. 塗布液を貯えるタンクと、前記塗布液を吐出するダイと、前記ダイへ前記塗布液を供給する配管と、前記配管の途中に設けられ前記塗布液を圧送するポンプと、前記ポンプと前記ダイとの間の前記配管に設けられた供給弁と、前記ダイから前記塗布液が吐出されていない期間に前記塗布液が通過して前記タンクへ前記塗布液を回収する戻し配管と、開閉状態が制御される戻し弁とを有し、
少なくとも前記戻し弁は開閉状態が任意に制御可能であり、
前記戻し弁は弁座の一方の側に第１および第２の貫通孔を他方の側に第３の貫通孔を有し、前記第１および第２の貫通孔は前記戻し弁が前記ポンプと前記供給弁との間の前記配管に挿入されるように前記配管に連通され、前記第３の貫通孔は前記戻し配管に連通されていることを特徴とする間欠塗布装置。 A tank for storing a coating liquid; a die for discharging the coating liquid; a pipe for supplying the coating liquid to the die; a pump provided in the middle of the pipe for pumping the coating liquid; and the pump and the die A supply valve provided in the pipe between the pipe, a return pipe through which the coating liquid passes and collects the coating liquid to the tank during a period when the coating liquid is not discharged from the die, and an open / close state is controlled And a return valve that is
At least the return valve can be arbitrarily controlled to open and close,
The return valve has first and second through holes on one side of the valve seat and a third through hole on the other side. The first and second through holes are connected to the pump by the return valve. The intermittent coating apparatus, wherein the pipe is communicated with the pipe so as to be inserted into the pipe between the supply valve, and the third through hole is communicated with the return pipe. 塗布液を貯えるタンクと、前記塗布液を吐出するダイと、前記ダイへ前記塗布液を供給する配管と、前記配管の途中に設けられ前記塗布液を圧送するポンプと、前記ポンプと前記ダイとの間の前記配管に設けられた供給弁と、前記ダイから前記塗布液が吐出されていない期間に前記塗布液が通過して前記タンクへ前記塗布液を回収する戻し配管と、前記戻し配管の途中に設けられた戻し弁とを有し、
少なくとも前記戻し弁は開閉状態が任意に制御可能であり、
前記供給弁は弁座の一方の側に第１および第２の貫通孔を他方の側に第３の貫通孔を有し、前記第１および第３の貫通孔は前記供給弁が前記配管に挿入されるように前記配管に連通され、前記第２の貫通孔は前記戻し配管に連通されていることを特徴とする間欠塗布装置。 A tank for storing a coating liquid; a die for discharging the coating liquid; a pipe for supplying the coating liquid to the die; a pump provided in the middle of the pipe for pumping the coating liquid; and the pump and the die A supply valve provided on the pipe between the pipe, a return pipe through which the coating liquid passes and collects the coating liquid to the tank during a period when the coating liquid is not discharged from the die, and a return pipe A return valve provided on the way,
At least the return valve can be arbitrarily controlled to open and close,
The supply valve has first and second through holes on one side of the valve seat and a third through hole on the other side. The first and third through holes are connected to the pipe by the supply valve. An intermittent coating apparatus characterized in that it is communicated with the pipe so as to be inserted, and the second through hole is communicated with the return pipe. 前記供給弁の前記弁体のストロークが略ゼロの状態からストロークが大きい状態に遷移する前に、前記戻し弁の前記弁体のストロークが大きい状態からストロークが略ゼロの状態との間のストロークが小さい状態になるよう制御されることを特徴とする、請求項１乃至３のいずれか一項に記載の間欠塗布装置。   Before the stroke of the valve body of the supply valve transitions from a substantially zero state to a large stroke state, the stroke between the large stroke of the valve body of the return valve and the substantially zero stroke is The intermittent coating apparatus according to any one of claims 1 to 3, wherein the intermittent coating apparatus is controlled so as to be in a small state. 全開状態の供給弁を通して塗布液を吐出し、前記供給弁を全閉状態とし、全開状態の戻し弁を通して前記塗布液を回収した後に前記戻し弁の開閉状態を制御し、その後に前記供給弁を全開状態とすることを特徴とする塗布方法。   The application liquid is discharged through the supply valve in the fully opened state, the supply valve is in the fully closed state, the open / closed state of the return valve is controlled after the application liquid is collected through the return valve in the fully open state, and then the supply valve is A coating method characterized by being in a fully open state. 前記供給弁が閉状態のときには前記戻し弁が開状態になるよう制御され、
前記供給弁が閉状態から開状態に遷移する前に、前記戻し弁は開状態から開状態と閉状態との間の半開状態になるよう制御されることを特徴とする、請求項５に記載の塗布方法。 When the supply valve is closed, the return valve is controlled to be open,
6. The return valve is controlled to be in a half-open state between an open state and a closed state before the supply valve transitions from a closed state to an open state. Application method. ダイから前記塗布液を吐出する塗布期間と、前記ダイから前記塗布液を吐出しない戻し期間とを交互に繰り返しながら塗布し、
前記戻し期間においては、前記戻し弁が開状態から開状態と閉状態との間の半開状態になるよう制御されるのに先立って、前記供給弁が開状態から閉状態になるよう制御されることを特徴とする、請求項５に記載の塗布方法。 Apply while alternately repeating the application period of discharging the coating liquid from the die and the return period of not discharging the coating liquid from the die,
In the return period, the supply valve is controlled from the open state to the closed state before the return valve is controlled from the open state to a half-open state between the open state and the closed state. The coating method according to claim 5, wherein: 前記供給弁の開度が略ゼロの状態から開度が大きい状態に遷移する前に、前記戻し弁は開度が大きい状態から開度が略ゼロの状態との間の中間状態になるよう制御されることを特徴とする、請求項５に記載の塗布方法。   Before the opening degree of the supply valve changes from a substantially zero state to a large opening state, the return valve is controlled to be in an intermediate state between a large opening degree and a substantially zero opening degree. The coating method according to claim 5, wherein the coating method is performed. ダイから前記塗布液を吐出する塗布期間と、前記ダイから前記塗布液を吐出しない戻し期間とを交互に繰り返しながら塗布し、
前記戻し期間においては、前記戻し弁の開度が大きい状態から開度が略ゼロの状態との間の中間状態になるよう制御されるのに先立って、前記供給弁の開度が大きい状態から開度が略ゼロの状態になるよう制御されることを特徴とする、請求項５に記載の塗布方法。 Apply while alternately repeating the application period of discharging the coating liquid from the die and the return period of not discharging the coating liquid from the die,
In the return period, prior to being controlled to be in an intermediate state between a state where the opening degree of the return valve is large and a state where the opening degree is substantially zero, from a state where the opening degree of the supply valve is large The coating method according to claim 5, wherein the opening is controlled to be substantially zero. 前記供給弁の弁体のストロークが略ゼロの状態からストロークが大きい状態に遷移する前に、前記戻し弁の弁体のストロークが大きい状態からストロークが略ゼロの状態との間のストロークが小さい状態になるよう制御されることを特徴とする、請求項５に記載の塗布方法。   A state in which the stroke between the state where the stroke of the valve body of the return valve is large and the state where the stroke is substantially zero is small before the stroke of the valve body of the supply valve transitions from the state where the stroke is substantially zero to the state where the stroke is large. The coating method according to claim 5, wherein the coating method is controlled to be.
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