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JP4092462B2 - Intermittent coating device - Google Patents
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JP4092462B2 - Intermittent coating device - Google Patents

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JP4092462B2
JP4092462B2 JP2002148740A JP2002148740A JP4092462B2 JP 4092462 B2 JP4092462 B2 JP 4092462B2 JP 2002148740 A JP2002148740 A JP 2002148740A JP 2002148740 A JP2002148740 A JP 2002148740A JP 4092462 B2 JP4092462 B2 JP 4092462B2
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valve
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JP2003340338A (en
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昌宏 中川
晨 工藤
太空美 市川
隆 大西
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井上金属工業株式会社
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Description

【０００１】
【発明の属する技術分野】
本発明は、ダイから塗工液を吐出して基材へ塗工するときに、ダイからの吐出と停止とを繰り返すことで、基材に塗工域と非塗工域とを交互に形成する間欠塗工装置に関する。
【０００２】
【従来の技術】
従来、間欠塗工装置１は、図１６の概略図に示す如く、基材Ｗに塗工液Ｍを塗工するダイＤと、ダイＤへ塗工液を圧送する圧送手段２と、ダイＤと圧送手段２の間に設けて開閉を交互に繰り返す断続バルブＶａと、ダイＤの吐出口Ｄａと断続バルブＶａの間のダイ側給液路３ａに接合するシリンダ４の内側４ａへピストン５を押し引き自在に挿入した吸引・圧送手段ＳＶを備えている。該塗工は、基材ＷとダイＤを相対移動させて行われ、例えば、基材Ｗを走行させてダイＤを停止させる場合と、基材Ｗを停止させてダイＤを走行させる場合とがある。
【０００３】
従来の間欠塗工装置１は、断続バルブＶａを開にして圧送手段２からダイ側給液路３ａへ圧送する塗工液ＭをダイＤで基材Ｗへ塗工して、基材Ｗに塗工域Ｃを形成し、断続バルブＶａを閉にしてダイ側給液路３ａに対する塗工液の圧送を停止して、基材Ｗに非塗工域Ｇを形成する。ところで、断続バルブＶａを閉にしただけでは、ダイ側給液路３ａに残存する塗工液Ｍは、加圧状態であるためダイＤの吐出口Ｄａから滲み出ることがある。そこで、間欠塗工装置１は、非塗工域Ｇを形成とき、断続バルブＶａを閉じるのと並行して吸引・圧送手段ＳＶの引き移動するピストン５でダイ側給液路３ａからシリンダ内４ａへ塗工液Ｍを吸引（矢符ａ）して、ダイＤの吐出口Ｄａにおける液切れを良好にしている。また、間欠塗工装置１は、断続バルブＶａを閉じるときに、ダイＤの吐出口Ｄａから塗工域Ｃの終端Ｃｂまで出ている塗工液Ｍ（同図の図（ｃ）において破線Ｅで囲まれている部分）を、吸引・圧送手段ＳＶの吸引でダイＤの吐出口Ｄａの内部へ吸引して、塗工域Ｃの終端をシャープに形成するようにしている。
【０００４】
更に、従来の間欠塗工装置１は、ダイ側給液路３ａにおける塗工液Ｍの通過抵抗が大きいため、断続バルブＶａを開いただけではダイＤの吐出口Ｄａからは、塗工に必要な流量の塗工液が瞬時に吐出せずに、徐々に吐出することになる。そこで、間欠塗工装置１は、塗工域Ｃを形成するために断続バルブＶａを開くのと並行して吸引・圧送手段ＳＶの押し移動するピストン５でシリンダ内４ａからダイ側給液路３ａへ塗工液を急速に圧送（矢符ｂ）して、ダイＤの吐出口Ｄａから所定流量の塗工液を瞬時に吐出させて、塗工域Ｃの始端Ｃｔをシャープに形成するようにしている。
【０００５】
【発明が解決しようとする課題】
ところで、吸引・圧送手段ＳＶは、断続バルブＶａを閉じるのと並行してシリンダ内４ａへ吸引した塗工液の全てを、断続バルブＶａを開くときにシリンダ内４ａから吐き出させて、次回の吸引に備えなければならない。しかし、間欠塗工装置１は、断続バルブＶａを開くときに、シリンダ内４ａへ吸引されている塗工液の全てをダイ側給液路３ａへ急速に圧送したとき、ダイＤの吐出口Ｄａから吐出する塗工液が過剰となって塗工域Ｃの始端Ｃｔ側の塗工膜厚みを局部的に厚くし（同図（Ｂ）参照）、始端側の膜厚みを調整できない問題がある。この問題を解決するために、吸引・圧送手段ＳＶのピストン５の押し移動中の速度を制御することが考えられるが、ピストン５の押し引きするストロークＳｔが短く且つピストン５の移動が早いため、速度制御は実質的に困難である。
【０００６】
そこで、本発明は、前記問題を解決するために、塗工域の始端側の膜厚みを調整できる間欠塗工装置を提供せんとするものである。
【０００７】
【課題を解決するための手段】
請求項１記載の本発明が採用した手段は、基材に塗工液を塗工するダイと、該ダイへ塗工液を圧送する圧送手段と、該ダイと該圧送手段の間に設けた断続バルブと、該ダイと該断続バルブの間のダイ側給液路に連通して塗工液を吸引又は圧送する吸引・圧送手段を備え、該断続バルブを閉じるときには該ダイ側給液路から該吸引・圧送手段へ塗工液を吸引し、該断続バルブを開くときには該吸引・圧送手段から該ダイ側給液路へ塗工液を圧送する間欠塗工装置において、前記吸引・圧送手段又は前記ダイ側給液路と前記ダイ側給液路の外側を、逃がし量を調整できる逃がし手段で連通し、前記吸引・圧送手段から圧送する塗工液の一部を逃がし手段で前記ダイ側給液路の外側へ逃がすことを特徴とする間欠塗工装置である。なお、前記吸引・圧送手段を、前記ダイ側給液路に連通するシリンダ内へピストンを押し引き自在に挿入したもので構成することもある。
【０００８】
請求項１記載の本発明にあっては、吸引・圧送手段からダイ側給液路へ塗工液を圧送するとき、圧送される塗工液の一部をダイ側給液路の外側へ逃がしてダイ側給液路へ供給しないことで、塗工域における始端側の塗工膜の厚みを調整できる。
【０００９】
請求項２記載の本発明が採用した手段は、基材に塗工液を塗工するダイと、該ダイへ塗工液を圧送する圧送手段と、該圧送手段と該ダイの間に設けた断続バルブと、該ダイと該断続バルブの間のダイ側給液路に連通するシリンダ内へピストンを押し引き自在に挿入した吸引・圧送手段を備え、該断続バルブを閉じるときには該吸引・圧送手段の引くピストンで該ダイ側給液路からシリンダ内へ塗工液を吸引し、該断続バルブを開くときには該吸引・圧送手段の押すピストンでシリンダ内から該ダイ側給液路へ塗工液を圧送する間欠塗工装置において、前記シリンダ内又は前記ダイ側給液路と前記ダイ側給液路の外側を、リリーフ弁を備えた逃がし路で連通し、前記吸引・圧送手段の押すピストンでシリンダ内から該圧送され、リリーフ弁の設定圧力を越える高圧の塗工液を、該逃がし路で前記ダイ側給液路の外側へ逃がすことを特徴とする間欠塗工装置である。
【００１０】
請求項２記載の本発明にあっては、吸引・圧送手段の押し移動するピストンでシリンダ内からダイ側給液路へ塗工液を圧送するときに、リリーフ弁の設定圧力を越える高圧の塗工液をダイ側給液路の外側へ逃がし、リリーフ弁の設定圧力に達しない低圧の塗工液をダイ側給液路へ供給することで、塗工域における始端側の塗工膜の厚みを調整できる。
【００１１】
請求項３記載の本発明が採用した手段は、基材に塗工液を塗工するダイと、該ダイへ塗工液を圧送する圧送手段と、該圧送手段と該ダイの間に設けた断続バルブと、該ダイと該断続バルブの間のダイ側給液路に連通するシリンダ内へピストンを押し引き自在に挿入した吸引・圧送手段と、該吸引・圧送手段にピストンの押し引きを指令すると共に該断続バルブに開閉を指令する制御装置を備え、該断続バルブを閉じるときに該吸引・圧送手段の引くピストンで該ダイ側給液路からシリンダ内へ塗工液を吸引し、該断続バルブを開くときに該吸引・圧送手段の押すピストンでシリンダ内から該ダイ側給液路へ塗工液を圧送する間欠塗工装置において、前記ダイ側給液路と前記シリンダ内を第１開閉弁を介して連通し、前記シリンダ内と前記ダイ側給液路の外側を第２開閉弁を介して連通し、前記制御装置は、前記吸引・圧送手段のピストンが引き移動を開始してから引き切っているときには、該第１開閉弁に開状態の維持を、該第２開閉弁に閉状態の維持をそれぞれ指令し、前記吸引・圧送手段のピストンが押し移動している途中では、該第１開閉弁に閉を、該第２開閉弁に開をそれぞれ指令し、前記吸引・圧送手段のピストンが押し切っているときには、該第１開閉弁に閉状態の維持を、該第２開閉弁に開状態の維持をそれぞれ指令することを特徴とする間欠塗工装置である。なお、前記第１開閉弁及び前記第２開閉弁は、三方弁で一体に形成することも可能である。
【００１２】
請求項３記載の本発明にあっては、吸引・圧送手段の押し移動するピストンでシリンダ内からダイ側給液路へ塗工液を圧送している途中までは、第１開閉弁を開き且つ第２開閉弁を閉じることでダイ側給液路へ塗工液を供給し、この途中に達したときに第１開閉弁を閉じ且つ第２開閉弁を開いて、この途中以降にシリンダ内から圧送される塗工液をダイ側給液路の外側へ逃がすことで、塗工域における始端側の塗工膜の厚みを調整できる。
【００１３】
請求項４記載の本発明が採用した手段は、基材に塗工液を塗工するダイと、該ダイへ塗工液を圧送する圧送手段と、該ダイと該圧送手段の間に設けた断続バルブと、該ダイと該断続バルブの間のダイ側給液路に連通するシリンダ内へピストンを押し引き自在に挿入した吸引・圧送手段と、該吸引・圧送手段にピストンの押し引きを指令すると共に該断続バルブに開閉を指令する制御装置を備え、該断続バルブを閉じるときに該吸引・圧送手段の引くピストンで該ダイ側給液路からシリンダ内へ塗工液を吸引し、該断続バルブを開くときに該吸引・圧送手段の押すピストンでシリンダ内から該ダイ側給液路へ塗工液を圧送する間欠塗工装置において、前記ダイ側給液路と前記シリンダ内を第１開閉弁を介して連通し、前記シリンダ内に第２開閉弁の一端を連通し、該第２開閉弁の他端と前記ダイ側給液路を第１流量調整弁及び第３開閉弁を介して連通し、該第２開閉弁の他端と前記ダイ側給液路の外側を第２流量調整弁を介して連通し、前記制御装置は、前記吸引・圧送手段のピストンが引き移動しているときには、該第１開閉弁に開状態の維持を、該第２開閉弁に閉状態の維持をそれぞれ指令し、前記吸引・圧送手段のピストンが引き切っているときには、該第１開閉弁に閉を、該第２開閉弁に開をそれぞれ指令し、前記吸引・圧送手段のピストンが押し移動しているときには、該第１開閉弁に閉状態の維持を、該第２開閉及び第３開閉弁に開状態の維持をそれぞれ指令し、前記吸引・圧送手段のピストンが押し切っているときには、該第３開閉弁に閉を指令した後に、該第１開閉弁に開を、該第２開閉弁に閉をそれぞれ指令することを特徴とする間欠塗工装置である。なお、前記第１開閉弁及び前記第２開閉弁は、三方弁で一体に形成することも可能である。
【００１４】
請求項４記載の本発明にあっては、吸引・圧送手段の押し移動するピストンでシリンダ内からダイ側給液路へ塗工液を圧送している途中までは、ダイ側給液路へ塗工液を供給し、この途中以降にシリンダ内から圧送される塗工液の一部を第１流量調整弁を介してダイ側給液路へ供給すると共に、残りの塗工液を第２流量調整弁を介してダイ側給液路の外側へ逃がすことで、塗工域における始端側の塗工膜の厚みを調整できる。この途中以降にダイ側給液路へ供給する塗工液の量とダイ側給液路の外側へ逃がす塗工液の量との割合は、第１流量調整弁及び第２流量調整弁の各流量を変更することで調整できる。
【００１５】
請求項５記載の本発明が採用した手段は、基材に塗工液を塗工するダイと、該ダイへ塗工液を圧送する圧送手段と、該圧送手段と該ダイの間に設けた断続バルブと、該ダイと該断続バルブの間のダイ側給液路に連通するシリンダ内へピストンを押し引き自在に挿入した第１吸引・圧送手段と、該第１吸引・圧送手段にピストンの押し引きを指令すると共に該断続バルブに開閉を指令する制御装置を備え、該断続バルブを閉じるときに該第１吸引・圧送手段の引くピストンで該ダイ側給液路からシリンダ内へ塗工液を吸引し、該断続バルブを開くときに該第１吸引・圧送手段の押すピストンでシリンダ内から該ダイ側給液路へ塗工液を圧送する間欠塗工装置において、前記ダイ側給液路及び前記第１吸引・圧送手段のシリンダ内の少なくとも一方に第１開閉弁を介して連通するシリンダ内へピストンを押し引き自在に挿入して、該シリンダ内への吸引量が前記第１吸引・圧送手段の吸引量よりも少ない第２吸引・圧送手段を設け、該第２吸引・圧送手段のシリンダ内と前記ダイ側給液路の外側を第２開閉弁を介して連通し、前記制御装置は、前記第１吸引・圧送手段のピストンが引き移動しているときには、該第１開閉弁に閉状態の維持を、該第２開閉弁に閉状態の維持を、第２吸引・圧送手段にピストン押し切り状態の維持をそれぞれ指令し、前記第１吸引・圧送手段のピストンが引き切っているときには、該第１開閉弁に開を、該第２開閉弁に閉状態の維持を、第２吸引・圧送手段にピストン押し切り状態の維持をそれぞれ指令し、前記第１吸引・圧送手段のピストンが押し移動しているときには、該第１開閉弁に開状態の維持を、第２開閉弁に閉状態の維持を、第２吸引・圧送手段にピストンの引きをそれぞれ指令し、前記第１吸引・圧送手段のピストンが押し切っている途中では、該第１開閉弁に閉を、第２開閉弁に開を、第２吸引・圧送手段にピストンの押しをそれぞれ指令し、その後に前記第１吸引・圧送手段のピストンが押し切っているときには、該第１開閉弁に閉状態の維持を、第２開閉弁に閉を、第２吸引・圧送手段にピストンの押し切り状態の維持をそれぞれ指令することを特徴とする間欠塗工装置である。
【００１６】
請求項５記載の本発明にあっては、第１吸引・圧送手段のピストンが引き移動しているときには、ダイ側給液路から第１吸引・圧送手段のピストン内へ塗工液を吸引し、第１吸引・圧送手段のピストンが押し移動ているときには、第１吸引・圧送手段のシリンダ内から圧送されている塗工液の一部をダイ側給液路へ供給すると共に、残りの塗工液を第２吸引・圧送手段の吸引状態のシリンダ内へ吸引することで、塗工域における始端側の塗工膜の厚みを調整できる。
【００１７】
請求項６記載の本発明が採用した手段は、基材に塗工液を塗工するダイと、該ダイへ塗工液を圧送する圧送手段と、該圧送手段と該ダイの間に設けた断続バルブと、該ダイと該断続バルブの間のダイ側給液路に連通するシリンダ内へピストンを押し引き自在に挿入した吸引・圧送手段と、該吸引・圧送手段にピストンの押し引きを指令すると共に該断続バルブに開閉を指令する制御装置を備え、該断続バルブを閉じるときに該吸引・圧送手段の引くピストンで該ダイ側給液路からシリンダ内へ塗工液を吸引し、該断続バルブを開くときに該吸引・圧送手段の押すピストンでシリンダ内から該ダイ側給液路へ塗工液を圧送する間欠塗工装置において、前記吸引・圧送手段は、前記シリンダが別個の主シリンダと副シリンダからなり、前記ピスントが主シリンダに挿入した主ピストンと副シリンダに挿入した副ピストンからなり、両ピストンの押し引きを連動させ、前記ダイ側給液路と該副シリンダ内を、前記ダイ側給液路へ向かう逆流を阻止する第１逆止弁で連通し、該副シリンダ内と前記ダイ側給液路の外側を、該副シリンダ内へ向かう逆流を阻止する第２逆止弁で連通したことを特徴とする間欠塗工装置である。
【００１８】
請求項６記載の本発明にあっては、吸引・圧送手段の両ピストンが引き移動しているときには、ダイ側給液路から主及び副のシリンダ内へ塗工液を吸引させ、吸引・圧送手段の両ピストンが押し移動しているときには、主シリンダ内の塗工液をダイ側給液路へ供給すると共に副シリンダ内の塗工液をダイ側給液路の外側へ逃がすことで、塗工域における始端側の塗工膜の厚みを調整できる。
【００１９】
請求項７記載の本発明が採用した手段は、基材に塗工液を塗工するダイと、該ダイへ塗工液を圧送する圧送手段と、該圧送手段と該ダイの間に設けた断続バルブと、該ダイと該断続バルブの間のダイ側給液路に連通するシリンダ内へピストンを押し引き自在に挿入した吸引・圧送手段と、該吸引・圧送手段にピストンの押し引きを指令すると共に該断続バルブに開閉を指令する制御装置を備え、該断続バルブを閉じるときに該吸引・圧送手段の引くピストンで該ダイ側給液路からシリンダ内へ塗工液を吸引し、該断続バルブを開くときに該吸引・圧送手段の押すピストンでシリンダ内から該ダイ側給液路へ塗工液を圧送する間欠塗工装置において、前記吸引・圧送手段は、前記シリンダが別個の主シリンダと副シリンダからなり、前記ピスントが主シリンダに挿入した主ピストンと副シリンダに挿入した副ピストンからなり、両ピストンの押し引きを連動させ、前記ダイ側給液路と該主シリンダ内を第１開閉弁を介して連通し、該主シリンダ内と該副シリンダ内を第２開閉弁を介して連通し、該副シリンダ内と前記ダイ側給液路の外側を第３開閉弁を介して連通し、前記制御装置は、前記吸引・圧送手段の両ピストンが引き移動しているときには、該第１開閉弁に開状態の維持を、該第２開閉弁に開状態の維持を、該第３開閉弁に閉状態の維持をそれぞれ指令し、前記吸引・圧送手段の両ピストンが引き切っているときには、該第１開閉弁に開状態の維持を、該第２開閉弁に閉を、該第３開閉弁に開をそれぞれ指令し、前記吸引・圧送手段のピストンが押し移動しているときには、該第１開閉弁に開状態の維持を、該第２開閉弁に閉状態の維持を、該第３開閉弁に開状態の維持をそれぞれ指令し、前記吸引・圧送手段のピストンが押し切っている途中では、該第１開閉弁に閉を、該第２開閉弁に閉状態の維持を、該第３開閉弁に開状態の維持をそれぞれ指令し、その後に前記吸引・圧送手段の両ピストンが押し切っているときには、該第１開閉弁に開を、該第２開閉弁に開を、該第３開閉弁に閉をそれぞれ指令することを特徴とする間欠塗工装置である。
【００２０】
請求項７記載の本発明にあっては、吸引・圧送手段の両ピストンが引き移動しているときには、ダイ側給液路から主及び副の各シリンダ内へ塗工液を吸引させ、吸引・圧送手段の両ピストンが押し移動しているときには、主シリンダ内の塗工液をダイ側給液路へ供給すると共に、副シリンダ内から塗工液をダイ側給液路の外側へ逃がすことで、塗工域における始端側の塗工膜の厚みを調整できる。
【００２１】
請求項８記載の本発明が採用した手段は、基材に塗工液を塗工するダイと、該ダイへ塗工液を圧送する圧送手段と、該圧送手段と該ダイの間に設けた断続バルブと、該ダイと該断続バルブの間のダイ側給液路に連通するシリンダ内へピストンを押し引き自在に挿入した吸引・圧送手段と、該吸引・圧送手段にピストンの押し引きを指令すると共に該断続バルブに開閉を指令する制御装置を備え、該断続バルブを閉じるときに該吸引・圧送手段の引くピストンで該ダイ側給液路からシリンダ内へ塗工液を吸引し、該断続バルブを開くときに該吸引・圧送手段の押すピストンでシリンダ内から該ダイ側給液路へ塗工液を圧送する間欠塗工装置において、前記吸引・圧送手段は、前記シリンダが主シリンダと複数個の副シリンダからなり、前記ピスントが主シリンダに挿入した主ピストンと各副シリンダに挿入した副ピストンとからなり、これらピストンの押し引きを連動させ、前記ダイ側給液路と該主シリンダ内を第１開閉弁を介して連通し、該主シリンダ内と該各副シリンダ内を個別に第２開閉弁を介して連通し、該各副シリンダ内と前記ダイ側給液路の外側を個別に第３開閉弁を介して連通し、前記制御装置は、任意個数の副シリンダ内へ連通する第２開閉弁に開状態の維持を、この任意個数の副シリンダ内へ連通する第３開閉弁に閉状態の維持をそれぞれ指令し、前記吸引・圧送手段のこれらピストンが引き移動しているときには、該第１開閉弁に開状態の維持を、残りの第２開閉弁に開状態の維持を、残りの第３開閉弁に閉状態の維持をそれぞれ指令し、前記吸引・圧送手段のこれらピストンが引き切っているときには、該第１開閉弁に開状態の維持を、残りの第２開閉弁に閉を、残りの第３開閉弁に開をそれぞれ指令し、前記吸引・圧送手段のこれらピストンが押し移動しているときには、該第１開閉弁に開状態の維持を、残りの第２開閉弁に閉状態の維持を、残りの第３開閉弁に開状態の維持をそれぞれ指令し、前記吸引・圧送手段のピストンが押し切っている途中では、該第１開閉弁に閉を、残りの第２開閉弁に閉状態の維持を、残りの第３開閉弁に開状態の維持をそれぞれ指令し、その後に前記吸引・圧送手段のこれらピストンが押し切っているときには、該第１開閉弁に開を、残りの第２開閉弁に開を、残りの第３開閉弁に閉をそれぞれ指令することを特徴とする間欠塗工装置である。
【００２２】
請求項８記載の本発明にあっては、吸引・圧送手段の全てのピストンが引き移動しているときには、ダイ側給液路から塗工液を全てのシリンダ内へ吸引させ、吸引・圧送手段の全てのピストンが押し移動しているときには、主シリンダ内及び任意個数の副シリンダ内から塗工液をダイ側給液路へ供給すると共に、残りの副シリンダ内から塗工液をダイ側給液路の外側へ逃がすことで、塗工域における始端側の塗工膜の厚みを調整できる。
【００２３】
【発明の実施の形態】
以下、本発明に係る間欠塗工装置（以下、「本発明塗工装置」という）を図面に示す実施の形態に基づいて説明する。
【００２４】
（第１の実施の形態）
図１は本発明塗工装置の第１の実施の形態を示す全体の概略図である。
【００２５】
本実施の形態に係る間欠塗工装置１１は、前記従来の間欠塗工装置１（図１６参照）と同様に、基材Ｗに塗工液Ｍを塗工するダイＤと、ダイＤへ塗工液Ｍを圧送する圧送手段２と、ダイＤと圧送手段２の間に設けて開閉を交互に繰り返す断続バルブＶａと、ダイＤの吐出口Ｄａと断続バルブＶａの間のダイ側給液路３ａに接合した吸引・圧送手段ＳＶと、吸引・圧送手段ＳＶ，断続バルブＶａ及び後述する開閉弁Ｖｂを制御する制御装置１５を備えている。ダイ側給液路３ａは、ダイＤの吐出口Ｄａと断続バルブＶａを連通するものであり、ダイＤの内部に形成した液路部分と、ダイＤの外部に配置してダイＤに接合した配管部分とからなる。
【００２６】
前記吸引・圧送手段ＳＶは、ダイ側給液路３ａに連通して、ダイ側給液路３ａから塗工液Ｍを吸引し、又はダイ側給液路３ａへ塗工液Ｍを圧送すように構成してある。本実施例の吸引・圧送手段ＳＶは、ダイ側給液路３ａに連通するシリンダ４と、シリンダ４の内側４ａへ押し引き自在に挿入したピストン５と、ピストン５を押し引き操作する空気圧シリンダー又はソレノイド等からなる操作具６を備え、ピストン５の引き移動に伴いダイ側給液路３ａからシリンダ内４ａへ塗工液Ｍを吸引し、ピストン５の押し移動に伴いシリンダ内４ａからダイ側給液路３ａへ塗工液Ｍを圧送すようにしてある。吸引・圧送手段ＳＶは、ピストン５の移動するストロークＳｔを変更できるようにすることもある。
【００２７】
前記ダイＤは、二つの分割可能に接合したリップ部材Ｄｂ，Ｄｃの境界部にダイ側給液路３ａの一部を形成すると共に、該境界部の先端にスリット状の吐出口Ｄａを開口している。ダイＤは、吐出口Ｄａの厚みとなるリップ部材Ｄｂ，Ｄｃの隙間寸法（例えば、５０〜２５０μｍ）を調整できるようにして、各種塗工条件に対応できるようにしてある。
【００２８】
前記圧送手段２は、塗工液Ｍを貯えるタンクＴと、タンクＴから延設してダイＤに接合する配管等からなる給液路３と、給液路３の途中に設けた上流側のポンプＰ及び下流側の断続バルブＶａと、ポンプＰと断続バルブＶａの間からタンクＴへ延設した配管等からなる戻し液路７と、戻し液路７の途中に配置した開閉弁Ｖｂを備えている。圧送手段２は、断続バルブＶａが開いているときには開閉弁Ｖｂを閉じて塗工液ＭをダイＤへ圧送し、断続バルブＶａが閉じているときには開閉弁Ｖｂを開いて塗工液ＭをタンクＴへ戻すようにして、ポンプＰの連続運転を確保している。断続バルブＶａ及び開閉弁Ｖｂは、その開閉がソレノイド等で操作される。なお、断続バルブＶａ及び開閉弁Ｖｂは、開閉状態が逆となるため、一個の三方弁に置換することも可能である。
【００２９】
前記間欠塗工装置１１を用いた塗工の形態は、基材ＷとダイＤの相対移動で行われ、例えば、基材Ｗを走行させてダイＤを停止させる態様（前者の態様）と、基材Ｗを停止させてダイＤを走行させる態様（後者の態様）とがある。前者の態様の一例としては、図示は省略したが、一定速度で回転駆動するバックアップロールに巻き掛けて走行する基材Ｗの表面に、固定したダイＤの吐出口Ｄａから吐出する塗工液を塗工するものがある。後者の態様の一例としては、固定盤に固定した基材Ｗの表面に、基材Ｗの表面に沿って移動するダイＤの吐出口Ｄａから吐出する塗工液Ｍを塗工するものがある。基材Ｗとしとては、前者の態様ではプラスチックフィルム等の連続したものが選択され、後者の態様ではガラス板等の適宜長さに切断したものが選択される。塗工液Ｍは、電池用又は液晶板等に適用されるものが選択される。ダイＤの姿勢としては、吐出口Ｄａの吐出方向を水平に向ける場合以外に、図示は省略したが、吐出口Ｄａの吐出方向を下方または上方に向ける場合があり、塗工条件に応じて最適な姿勢が選択される。このダイＤの姿勢の選択は、前記の前者の態様又は後者の態様の選択と合わせて行われる。
【００３０】
本実施の形態に係る間欠塗工装置１１の改良点は、吸引・圧送手段ＳＶとダイ側給液路３ａの外側、又はダイ側給液路３ａとダイ側給液路３ａの外側を、逃がし量を調整できる逃がし手段１２で連通し、吸引・圧送手段ＳＶから圧送する（矢符ｂ）塗工液Ｍの一部を逃がし手段１２でダイ側給液路３ａの外側へ逃がすように構成したことである。この改良により間欠塗工装置１１は、吸引・圧送手段ＳＶからダイ側給液路３ａへ塗工液Ｍを圧送するときに、塗工液Ｍの一部をダイ側給液路３ａの外側へ逃がしてダイ側給液路３ａへ供給させないことで、塗工域Ｃにおける始端Ｃｔ側の塗工膜の厚みを調整できる。本実施例においては、吸引・圧送手段ＳＶのシリンダ内４ａ又はダイ側給液路３ａとダイ側給液路３ａの外側（本実施例ではタンクＴ）を、逃がし量を調整できる逃がし手段１２で連通し、吸引・圧送手段ＳＶの押すピストン５でシリンダ内４ａから圧送する（矢符ｂ）塗工液Ｍの一部を逃がし手段１２でダイ側給液路３ａの外側へ逃がすように構成してある。これにより、間欠塗工装置１１は、吸引・圧送手段ＳＶの押すピストン５でシリンダ内４ａからダイ側給液路３ａへ塗工液Ｍを圧送するときに、シリンダ内４ａの塗工液Ｍの一部をダイ側給液路３ａの外側へ逃がしてダイ側給液路３ａへ供給させないことで、塗工域Ｃにおける始端Ｃｔ側の塗工膜の厚みを調整できる。
【００３１】
前記逃がし手段１２は、ダイ側給液路３ａ又は吸引・圧送手段ＳＶのシリンダ内４ａとダイ側給液路３ａの外側（本実施例ではタンクＴ）を、リリーフ弁１３を備えた逃がし路１４で連通し、吸引・圧送手段ＳＶの押すピストン５でシリンダ内４ａから圧送されリリーフ弁１３の設定圧力を越える高圧の塗工液Ｍを逃がし路１４を介してダイ側給液路３ａの外側へ逃がすように構成してある。リリーフ弁１３は、設定圧力を調整することで、逃がし路１４へ逃がす余分な塗工液Ｍの量を変更でき、塗工域Ｃにおける始端Ｃｔ側の塗工膜の厚みを調整できる。
【００３２】
前記制御装置１５は、前記吸引・圧送手段ＳＶ，前記断続バルブＶａ及び前記開閉弁Ｖｂに指令を発して、次の通り制御する。塗工を停止するために断続バルブＶａを閉にするときには、開閉弁Ｖｂを開くと共に吸引・圧送手段ＳＶのピストン５を引き移動させ、逆に、塗工を再開するために断続バルブＶａを開くときには、開閉弁Ｖｂを閉じると共に吸引・圧送手段ＳＶのピストン５を押し移動させる。塗工停止中は、断続バルブＶａの閉状態、開閉弁Ｖｂの開状態及び吸引・圧送手段ＳＶのピストン５の引き切り状態の各々が維持され、逆に、塗工中は、断続バルブＶａの開状態、開閉弁Ｖｂの閉状態及び吸引・圧送手段ＳＶのピストン５の押し切り状態の各々が維持される。
【００３３】
前記間欠塗工装置１１を用いた塗工方法は、断続バルブＶａを閉にしてダイ側給液路３ａに対する塗工液の圧送を停止して非塗工域Ｇを形成し、断続バルブＶａを開にしてダイ側給液路３ａへ圧送した塗工液をダイＤで塗工して塗工域Ｃを形成する。基材Ｗに非塗工域Ｇを形成するために断続バルブＶａを閉じるときは、ダイ側給液路３ａの塗工液Ｍを吸引・圧送手段ＳＶの引き移動するピストン５でシリンダ内４ａへ吸引（矢符ａ）して、ダイＤの吐出口Ｄａから塗工域Ｃの終端Ｃｂまで出ている塗工液Ｍ（図１６の図（ｃ）において破線Ｅで囲まれている部分）を吐出口Ｄａの内部へ吸引する。これにより、吐出口Ｄａにおける液切れを良好にすると共に、塗工域Ｃの終端Ｃｂが吐出口Ｄａの長手方向へ沿って一直線となるように終端Ｃｂをシャープに形成できる。
【００３４】
また、基材Ｗに塗工域Ｃを形成するために断続バルブＶａを開くときは、吸引・圧送手段ＳＶの押し移動するピストン５でシリンダ内４ａからダイ側給液路３ａへ塗工液Ｍを急速に圧送（矢符ｂ）して、ダイ側給液路３ａに残留している塗工液Ｍの圧力を急速に高めてダイＤの吐出口Ｄａから所定流量の塗工液を瞬時に吐出させて、塗工域Ｃの始端Ｃｔをシャープに形成する。このとき、シリンダ内４ａから急速に圧送（矢符ｂ）する塗工液Ｍは、塗工域Ｃの始端Ｃｔをシャープに形成する以外の余分な量も含まれている。そこで、間欠塗工装置１１は、リリーフ弁１３の設定圧力を越える高圧の余分な塗工液をダイ側給液路３ａの外側となるタンクＴへ逃がし、リリーフ弁１３の設定圧力に達しない圧力の塗工液Ｍをダイ側給液路３ａへ供給することで、塗工域Ｃにおける始端Ｃｔ側の塗工膜の厚みを調整できる。
【００３５】
（第２の実施の形態）
図２乃至図４は第２の実施の形態の本発明塗工装置を示すものであって、図２は全体の概略図、図３は第１開閉弁及び第２開閉弁を三方弁で構成したときの全体の概略図、図４は各弁及び吸引・圧送手段の動作タイミングを示すタイミングチャートである。
【００３６】
本実施の形態に係る間欠塗工装置２１は、前記間欠塗工装置１１（図１参照）と同様に、基材Ｗに塗工液Ｍを塗工するダイＤと、ダイＤへ塗工液Ｍを圧送する圧送手段２と、ダイＤと圧送手段２の間に設けて開閉を交互に繰り返す断続バルブＶａと、ダイＤの吐出口Ｄａと断続バルブＶａの間のダイ側給液路３ａに接合した吸引・圧送手段ＳＶを備えており、ダイＤの構造、圧送手段２の構造、吸引・圧送手段ＳＶの構造及びダイ側給液路３ａの内容が前記間欠塗工装置１１のものと実質的に同一である。
【００３７】
本実施の形態に係る間欠塗工装置２１が前記間欠塗工装置１１と異なる所は、ダイ側給液路３ａと吸引・圧送手段ＳＶのシリンダ内４ａを第１開閉弁Ｖ１を介して配管等で連通し、シリンダ内４ａとダイ側給液路３ａの外側（本実施例ではタンクＴ）を第２開閉弁Ｖ２を介して逃がし路２４で連通したこと、並びに、制御装置２５の指令の内容である。
【００３８】
該制御装置２５は、断続バルブＶａ、圧送手段２の開閉弁Ｖｂ、吸引・圧送手段ＳＶの操作具６、第１開閉弁Ｖ１及び第２開閉弁Ｖ２に対する指令を、図４に示すように発するものである。すなわち、基材Ｗに塗工域Ｃを形成する塗工帯では、断続バルブＶａに開の維持を、開閉弁Ｖｂに閉の維持をそれぞれ指令する。基材Ｗに非塗工域Ｇを形成する休止帯では、断続バルブＶａに閉の維持を、開閉弁Ｖｂに開の維持をそれぞれ指令する。塗工を行わない休止帯中、すなわち吸引・圧送手段ＳＶのピストン５が引き移動をしいるとき（図中の時間帯Ｐ）、並びにピストン５が引き切っているとき（図中の時間帯Ｒ）は、第１開閉弁Ｖ１に開状態の維持を、第２開閉弁Ｖ２に閉状態の維持をそれぞれ指令する。塗工を行う塗工帯において吸引・圧送手段ＳＶのピストン５が押し移動している途中（図中の時間帯Ｊの途中）では、第１開閉弁Ｖ１に閉を、第２開閉弁Ｖ２に開をそれぞれ指令する。塗工帯において吸引・圧送手段のピストンが押し切っているとき（図中の時間帯Ｋ）は、第１開閉弁Ｖ１に閉状態の維持を、第２開閉弁Ｖ２に開状態の維持をそれぞれ指令する。
【００３９】
なお、前記第１開閉弁Ｖ１及び前記第２開閉弁Ｖ２は、開閉状態が逆となるため、図３に示す一個の三方弁Ｖｃに置換することも可能である。
【００４０】
前記間欠塗工装置２１を用いた塗工方法は、断続バルブＶａを閉にしてダイ側給液路３ａに対する塗工液の圧送を停止して非塗工域Ｇを形成し、断続バルブＶａを開にしてダイ側給液路３ａへ圧送した塗工液をダイＤで塗工して塗工域Ｃを形成する。基材Ｗに非塗工域Ｇを形成するために断続バルブＶａを閉じるときは、ダイ側給液路３ａの塗工液Ｍを吸引・圧送手段ＳＶの引き移動するピストン５でシリンダ内４ａへ吸引（矢符ａ）して、ダイＤの吐出口Ｄａから塗工域Ｃの終端Ｃｂまで出ている塗工液Ｍ（図１６の図（ｃ）において破線Ｅで囲まれている部分）を吐出口Ｄａの内部へ吸引する。これにより、吐出口Ｄａにおける液切れを良好にすると共に、塗工域Ｃの終端Ｃｂが吐出口Ｄａの長手方向へ沿って一直線となるように終端Ｃｂをシャープに形成できる。
【００４１】
また、基材Ｗに塗工域Ｃを形成するために断続バルブＶａを開くときは、吸引・圧送手段ＳＶのピストン５を押し移動させつつシリンダ内４ａからダイ側給液路３ａへ塗工液Ｍを圧送している途中（図４の時間帯Ｊの途中であって、断続バルブＶａの開閉の切替えから時間Ｔ１に至るとき）までは、第１開閉弁Ｖ１を開き且つ第２開閉弁Ｖ２を閉じることで塗工液Ｍをダイ側給液路３ａへ供給し、この途中に達したときに第１開閉弁Ｖ１を閉じ且つ第２開閉弁Ｖ２を開いて、この途中以降にシリンダ内４ａから圧送される余分な塗工液Ｍを、逃がし路２４を通じてダイ側給液路３ａの外側となるタンクＴへ逃がして、塗工域Ｃにおける始端Ｃｔ側の塗工膜の厚みを調整できる。この第１開閉弁Ｖ１及び第２開閉弁Ｖ２の開閉を切り替える時間Ｔ１は、各種塗工条件に応じて適宜設定される。
【００４２】
（第３の実施の形態）
図５乃至図７は第３の実施の形態の本発明塗工装置を示すものであって、図５は全体の概略図、図６は第１開閉弁及び第２開閉弁を三方弁で構成したときの全体の概略図、図７は各弁及び吸引・圧送手段の動作タイミングを示すタイミングチャートである。
【００４３】
本実施の形態に係る間欠塗工装置３１は、前記間欠塗工装置１１（図１参照）と同様に、基材Ｗに塗工液Ｍを塗工するダイＤと、ダイＤへ塗工液Ｍを圧送する圧送手段２と、ダイＤと圧送手段２の間に設けて開閉を交互に繰り返す断続バルブＶａと、ダイＤの吐出口Ｄａと断続バルブＶａの間のダイ側給液路３ａに接合した吸引・圧送手段ＳＶを備えており、ダイＤの構造、圧送手段２の構造、吸引・圧送手段ＳＶの構造及びダイ側給液路３ａの内容が前記間欠塗工装置１１のものと実質的に同一である。
【００４４】
本実施の形態に係る間欠塗工装置３１が前記間欠塗工装置１１と異なる所は、ダイ側給液路３ａと吸引・圧送手段ＳＶのシリンダ内４ａを第１開閉弁Ｖ１を介して連通し、吸引・圧送手段ＳＶのシリンダ内４ａに第２開閉弁Ｖ２の一端を連通し、第２開閉弁Ｖ２の他端とダイ側給液路３ａを第１流量調整弁Ｆ１を介して連通し、第２開閉弁Ｖ２の他端とダイ側給液路３ａの外側（本実施例ではタンクＴ）を第２流量調整弁Ｆ２を介して逃がし路３４で連通したこと、並びに、制御装置３５の指令の内容である。第１流量調整弁Ｆ１及び第２流量調整弁Ｆ２は、例えばニードル弁が用いられ、ニードルを進退させることで流量を調整できるようにしてある。間欠塗工装置３１は、断続バルブＶａを開いて塗工しているときに、塗工液が第１流量調整弁Ｆ１及び第２流量調整弁Ｆ２を逆流してダイ側給液路の外側へ逃げ出さないように、第２開閉弁Ｖ２の他端とダイ側給液路３ａを第１流量調整弁Ｆ１を介して連通する液路の途中に第３開閉弁Ｖ３を設けてある。
【００４５】
該制御装置３５は、断続バルブＶａ、圧送手段２の開閉弁Ｖｂ、吸引・圧送手段ＳＶの操作具６、第１開閉弁Ｖ１、第２開閉弁Ｖ２及び第３開閉弁Ｖ３に対する指令を、図７に示すように発するものである。すなわち、基材Ｗに塗工域Ｃを形成する塗工帯では、断続バルブＶａに開の維持を、開閉弁Ｖｂに閉の維持をそれぞれ指令する。基材Ｗに非塗工域Ｇを形成する休止帯では、断続バルブＶａに閉の維持を、開閉弁Ｖｂに開の維持をそれぞれ指令する。塗工を行わない休止帯において吸引・圧送手段のピストンが引き移動しているとき（図中の時間帯Ｐ）は、第１開閉弁Ｖ１に開状態の維持を、第２開閉弁Ｖ２に閉状態の維持を、第３開閉弁Ｖ３に閉状態の維持をそれぞれ指令する。休止帯において吸引・圧送手段ＳＶのピストン５が引き切っているとき（図中の時間帯Ｒ）は、第１開閉弁Ｖ１に閉を、第２開閉弁Ｖ２に開を、第３開閉弁Ｖ３に開をそれぞれ指令する。塗工を行う塗工帯において吸引・圧送手段ＳＶのピストン５が押し移動しているとき（図中の時間帯Ｊ）は、第１開閉弁Ｖ１に閉状態の維持を、第２開閉弁Ｖ２に開状態の維持を、第３開閉弁Ｖ３に開状態の維持をそれぞれ指令する。塗工帯において吸引・圧送手段ＳＶのピストン５が押し切っているとき（図中の時間帯Ｋ）は、第３開閉弁３に閉を指令した後に、第１開閉弁Ｖ１に開を、第２開閉弁Ｖ２に閉をそれぞれ指令する。
【００４６】
なお、前記第１開閉弁Ｖ１及び前記第２開閉弁Ｖ２は、開閉状態が逆となるため、図６に示す一個の三方弁Ｖｃに置換することも可能である。
【００４７】
前記間欠塗工装置３１を用いた塗工方法は、断続バルブＶａを閉にしてダイ側給液路３ａに対する塗工液の圧送を停止して非塗工域Ｇを形成し、断続バルブＶａを開にしてダイ側給液路３ａへ圧送した塗工液をダイＤで塗工して塗工域Ｃを形成する。基材Ｗに非塗工域Ｇを形成するために断続バルブＶａを閉じるときは、ダイ側給液路３ａの塗工液Ｍを吸引・圧送手段ＳＶの引き移動するピストン５でシリンダ内４ａへ吸引（矢符ａ）して、ダイＤの吐出口Ｄａから塗工域Ｃの終端Ｃｂまで出ている塗工液Ｍ（図１６の図（ｃ）において破線Ｅで囲まれている部分）を吐出口Ｄａの内部へ吸引する。これにより、吐出口Ｄａにおける液切れを良好にすると共に、塗工域Ｃの終端Ｃｂが吐出口Ｄａの長手方向へ沿って一直線となるように終端Ｃｂをシャープに形成する。
【００４８】
また、基材Ｗに塗工域Ｃを形成するために断続バルブＶａを開いて、吸引・圧送手段ＳＶのピストン５を押し移動させつつシリンダ内４ａから塗工液Ｍを圧送しているときは、圧送している塗工液の一部を第１流量調整弁Ｆ１及び開状態の第３開閉弁Ｖ３を介してダイ側給液路３ａへ供給すると共に、残りの余分な塗工液を逃がし路３４の第２流量調整弁Ｆ２を介してダイ側給液路３ａの外側となるタンクＴへ逃がすことで、塗工域Ｃにおける始端Ｃｔ側の塗工膜の厚みを調整できる。ダイ側給液路３ａへ供給する塗工液の量とダイ側給液路の外側へ逃がす余分な塗工液の量との割合は、第１流量調整弁Ｆ１及び第２流量調整弁Ｆ２の各流量を変更することで調整できる。
【００４９】
（第４の実施の形態）
図８及び図９は第４の実施の形態の本発明塗工装置を示すものであって、図８は全体の概略図、図９は各弁及び吸引・圧送手段の動作タイミングを示すタイミングチャートである。
【００５０】
本実施の形態に係る間欠塗工装置４１は、前記間欠塗工装置１１（図１参照）と同様に、基材Ｗに塗工液Ｍを塗工するダイＤと、ダイＤへ塗工液Ｍを圧送する圧送手段２と、ダイＤと圧送手段２の間に設けて開閉を交互に繰り返す断続バルブＶａと、ダイＤの吐出口Ｄａと断続バルブＶａの間のダイ側給液路３ａに接合した第１吸引・圧送手段ＳＶ１（前記間欠塗工装置１１の吸引・圧送手段ＳＶに相当）を備えており、ダイＤの構造、圧送手段２の構造、第１吸引・圧送手段ＳＶ１の構造及びダイ側給液路３ａの内容が前記間欠塗工装置１１のものと実質的に同一である。
【００５１】
本実施の形態に係る間欠塗工装置４１が前記間欠塗工装置１１と異なる所は、ダイ側給液路３ａ及び第１吸引・圧送手段ＳＶ１のシリンダ内４ａの少なくとも一方に第１開閉弁Ｖ１を介して連通する第２吸引・圧送手段ＳＶ２を設け、第２吸引・圧送手段ＳＶ２のシリンダ内２４ａとダイ側給液路３ａの外側（本実施例の場合はタンクＴ）を第２開閉弁Ｖ２を介して逃がし路４４で連通したこと、並びに、制御装置４５の指令の内容である。
【００５２】
前記第２吸引・圧送手段ＳＶ２は、ダイ側給液路３ａ及び第１吸引・圧送手段ＳＶ１のシリンダ内４ａの少なくとも一方（図示の場合は両方）に第１開閉弁Ｖ１を介して連通するシリンダ２４と、シリンダ２４の内側２４ａへ押し引き自在に挿入したピストン２５と、ピストン２５を押し引き操作する空気圧シリンダー又はソレノイド等からなる操作具２６を備え、シリンダ内２４ａへの吸引量を第１吸引・圧送手段ＳＶ１よりも少なくしてある。第２吸引・圧送手段ＳＶ２は、前記第１吸引・圧送手段ＳＶ１のシリンダ内４ａから圧送された余分な塗工液Ｍを、ピストン２５の引き移動に伴いシリンダ内２４ａへ吸引すると共に、ピストン２５の押し移動でシリンダ内２４ａから吐出する塗工液Ｍを逃がし路４４の第２開閉弁Ｖ２を介してダイ側給液路３ａの外側へ逃がすように構成してある。第２吸引・圧送手段ＳＶ２は、ピストン２５の移動するストロークＳｔを変更できるようにすることもある。
【００５３】
前記制御装置４５は、断続バルブＶａ、圧送手段２の開閉弁Ｖｂ、第１吸引・圧送手段ＳＶ１の操作具６、第２吸引・圧送手段ＳＶ２の操作具２６、第１開閉弁Ｖ１及び第２開閉弁Ｖ２に対する指令を、図９に示すように発するものである。すなわち、基材Ｗに塗工域Ｃを形成する塗工帯では、断続バルブＶａに開の維持を、開閉弁Ｖｂに閉の維持をそれぞれ指令する。基材Ｗに非塗工域Ｇを形成する休止帯では、断続バルブＶａに閉の維持を、開閉弁Ｖｂに開の維持をそれぞれ指令する。塗工を行わない休止帯において第１吸引・圧送手段ＳＶ１のピストン５が引き移動しているとき（図中の時間帯Ｐ）は、第１開閉弁Ｖ１に閉状態の維持を、第２開閉弁Ｖ２に閉状態の維持を、第２吸引・圧送手段ＳＶ２にピストン２５の押し切り状態の維持をそれぞれ指令する。休止帯において第１吸引・圧送手段ＳＶ１のピストン５が引き切っているとき（図中の時間帯Ｒ）は、第１開閉弁Ｖ１に開を、第２開閉弁Ｖ２に閉状態の維持を、第２吸引・圧送手段ＳＶ２にピストン２５の押し切り状態の維持をそれぞれ指令する。塗工を行う塗工帯において第１吸引・圧送手段ＳＶ１のピストン５が押し移動しているとき（図中の時間帯Ｊ）は、第１開閉弁Ｖ１に開状態の維持を、第２開閉弁Ｖ２に閉状態の維持を、第２吸引・圧送手段ＳＶ２にピストン２５の引きをそれぞれ指令する。塗工帯において第１吸引・圧送手段ＳＶ１のピストン５が押し切っている途中（図中の時間帯Ｋの途中）では、第１開閉弁Ｖ１に閉を、第２開閉弁Ｖ２に開を、第２吸引・圧送手段ＳＶ２にピストン２５の引き切りをそれぞれ指令する。その後に第１吸引・圧送手段ＳＶ１のピストン５が押し切っているときには、第１開閉弁Ｖ１に閉状態の維持を、第２開閉弁Ｖ２に閉を、第２吸引・圧送手段ＳＶ２にピストン２５の押し切り状態の維持をそれぞれ指令する。
【００５４】
前記間欠塗工装置４１を用いた塗工方法は、図８に示す断続バルブＶａを閉にしてダイ側給液路３ａに対する塗工液の圧送を停止して非塗工域Ｇを形成し、断続バルブＶａを開にしてダイ側給液路３ａへ圧送した塗工液をダイＤで塗工して塗工域Ｃを形成する。基材Ｗに非塗工域Ｇを形成するために断続バルブＶａを閉じるときは、ダイ側給液路３ａの塗工液Ｍを第１吸引・圧送手段ＳＶ１の引き移動するピストン５でシリンダ内４ａへ吸引（矢符ａ）して、ダイＤの吐出口Ｄａから塗工域Ｃの終端Ｃｂまで出ている塗工液Ｍ（図１６の図（ｃ）において破線Ｅで囲まれている部分）を吐出口Ｄａの内部へ吸引する。これにより、吐出口Ｄａにおける液切れを良好にすると共に、塗工域Ｃの終端Ｃｂが吐出口Ｄａの長手方向へ沿って一直線となるように終端Ｃｂをシャープに形成できる。
【００５５】
また、基材Ｗに塗工域Ｃを形成するために断続バルブＶａを開くときは、第１開閉弁Ｖ１を開き状態にすると共に第２開閉弁Ｖ２を閉じ状態にして、第１吸引・圧送手段ＳＶ１のピストン５を押し移動させると共に第２吸引・圧送手段ＳＶ２のピストン２５を引き移動させることにより、第１吸引・圧送手段ＳＶ１のシリンダ内４ａから圧送される塗工液Ｍの一部をダイ側給液路３ａへ供給すると共に、残りの余分な塗工液Ｍを第２吸引・圧送手段ＳＶ２のシリンダ内２４ａへ吸引することで、塗工域Ｃにおける始端Ｃｔ側の塗工膜の厚みを調整できる。ダイ側給液路３ａへ供給する塗工液の量とダイ側給液路３ａへ供給することなく第２吸引・圧送手段ＳＶ２のシリンダ内２４ａへ吸引する塗工液の量との割合は、第１吸引・圧送手段ＳＶ１のシリンダ４の吸引量と第２吸引・圧送手段ＳＶ２のシリンダ２４の吸引量とを変更することで調整できる。各シリンダ４及び２４の吸引量の変更は、各ピストン５（又は２５）のストロークＳｔを変更して行うこともある。
【００５６】
第１吸引・圧送手段ＳＶ１のピストン５が押し切り且つ第２吸引・圧送手段ＳＶ２のピストン２５が引き切った後は、第１開閉弁Ｖ１を閉じ状態にすると共に第２開閉弁Ｖ２を開き状態にして、第２吸引・圧送手段ＳＶ２のピストン２５を押し移動させて、シリンダ内２４ａの余分な塗工液Ｍを逃がし路４４を通じてダイ側給液路３ａの外側となるタンクＴへ逃がして、第２吸引・圧送手段ＳＶ２を次の吸引動作まで待機させる。
【００５７】
（第５の実施の形態）
図１０は第５の実施の形態の本発明塗工装置の全体の概略図である。
【００５８】
本実施の形態に係る間欠塗工装置５１は、前記間欠塗工装置１１（図１参照）と同様に、基材Ｗに塗工液Ｍを塗工するダイＤと、ダイＤへ塗工液Ｍを圧送する圧送手段２と、ダイＤと圧送手段２の間に設けて開閉を交互に繰り返す断続バルブＶａを備えており、ダイＤの構造、圧送手段２の構造及びダイＤの吐出口Ｄａと断続バルブＶａの間のダイ側給液路３ａの内容が前記間欠塗工装置１１のものと実質的に同一である。
【００５９】
本実施の形態に係る間欠塗工装置５１が前記間欠塗工装置１１と異なる所は、ダイＤの吐出口Ｄａと断続バルブＶａの間のダイ側給液路３ａに接合した吸引・圧送手段ＳＶの構造と、ダイ側給液路３ａと吸引・圧送手段ＳＶの接合構造と、吸引・圧送手段ＳＶとダイ側給液路３ａの外側を連通する逃がし路５４の内容である。
【００６０】
前記吸引・圧送手段ＳＶは、シリンダ４を別個の主シリンダ４Ａと副シリンダ４Ｂで形成し、ピスント５を主シリンダ４Ａに挿入した主ピストン５Ａと副シリンダ４Ｂに挿入した副ピストン５Ｂで形成し、両ピストン５Ａ，５Ｂの押し引きを連動させて操作具６で操作するようにしてある。吸引・圧送手段ＳＶは、前記ダイ側給液路３ａと主シリンダ内４Ａａを連通すると共に、前記ダイ側給液路３ａと副シリンダ内４Ｂａを、ダイ側給液路３ａへ向かう逆流を阻止する第１逆止弁５２を介して連通している。
【００６１】
前記逃がし路５４は、前記吸引・圧送手段ＳＶの副シリンダ内４Ｂａとダイ側給液路３ａの外側（本実施例ではタンクＴ）を連通するものであり、その途中に第２逆止弁５３を設けて、副シリンダ内４Ｂａへ向かう逆流を阻止するようにしてある。
【００６２】
前記間欠塗工装置５１を用いた塗工方法は、断続バルブＶａを閉にしてダイ側給液路３ａに対する塗工液の圧送を停止して非塗工域Ｇを形成し、断続バルブＶａを開にしてダイ側給液路３ａへ圧送した塗工液をダイＤで塗工して塗工域Ｃを形成する。基材Ｗに非塗工域Ｇを形成するために断続バルブＶａを閉じるときは、ダイ側給液路３ａの塗工液Ｍを吸引・圧送手段ＳＶの引き移動する主ピストン５Ａ及び副ピストン５Ｂで主シリンダ内４Ａａ及び副シリンダ内４Ｂａへ吸引（矢符ａ）して、ダイＤの吐出口Ｄａから塗工域Ｃの終端Ｃｂまで出ている塗工液Ｍ（図１６の図（ｃ）において破線Ｅで囲まれている部分）を吐出口Ｄａの内部へ吸引する。これにより、吐出口Ｄａにおける液切れを良好にすると共に、塗工域Ｃの終端Ｃｂが吐出口Ｄａの長手方向へ沿って一直線となるように終端Ｃｂをシャープに形成できる。
【００６３】
また、基材Ｗに塗工域Ｃを形成するために断続バルブＶａを開くときは、吸引・圧送手段ＳＶの主ピストン５Ａ及び副ピストン５Ｂを押し移動させることにより、主シリンダ内４Ａａから圧送される塗工液Ｍをダイ側給液路３ａへ供給（矢符ｂ）すると共に、副シリンダ内４Ｂａから圧送される余分な塗工液Ｍを逃がし路５４を介してタンクＴへ逃がして（矢符ｃ）、塗工域Ｃにおける始端Ｃｔ側の塗工膜の厚みを調整できる。ダイ側給液路３ａへ供給する塗工液の量とタンクＴへ逃がす塗工液の量との割合は、主シリンダ４Ａの吸引量と副シリンダ４Ｂの吸引量を変更することで調整できる。主シリンダ４Ａ及び副シリンダ４Ｂの吸引量の変更は、各ピストン５Ａ，５Ｂのストロークを変更して行うことができる。
【００６４】
（第６の実施の形態）
図１１乃至図１３は第６の実施の形態の本発明塗工装置を示すものであって、図１１は全体の概略図、図１２は第１開閉弁及び第２開閉弁を三方弁で構成したときの全体の概略図、図１３は各弁及び吸引・圧送手段の動作タイミングを示すタイミングチャートである。
【００６５】
本実施の形態に係る間欠塗工装置６１は、前記間欠塗工装置１１（図１参照）と同様に、基材Ｗに塗工液Ｍを塗工するダイＤと、ダイＤへ塗工液Ｍを圧送する圧送手段２と、ダイＤと圧送手段２の間に設けて開閉を交互に繰り返す断続バルブＶａを備えており、ダイＤの構造、圧送手段２の構造及びダイＤの吐出口Ｄａと断続バルブＶａの間のダイ側給液路３ａの内容が前記間欠塗工装置１１のものと実質的に同一である。
【００６６】
本実施の形態に係る間欠塗工装置６１が前記間欠塗工装置１１と異なる所は、ダイＤの吐出口Ｄａと断続バルブＶａの間のダイ側給液路３ａに接合した吸引・圧送手段ＳＶの構造と、ダイ側給液路３ａと吸引・圧送手段ＳＶの接合構造と、吸引・圧送手段ＳＶとダイ側給液路３ａの外側を連通する逃がし路６４の構造と、制御装置６５の指令の内容である。
【００６７】
前記吸引・圧送手段ＳＶは、シリンダ４を別個の主シリンダ４Ａと副シリンダ４Ｂで形成し、ピスント５を主シリンダ４Ａに挿入した主ピストン５Ａと副シリンダ４Ｂに挿入した副ピストン５Ｂで形成し、両ピストン５Ａ，５Ｂの押し引きを連動させて操作具６で操作するようにしてある。吸引・圧送手段ＳＶは、前記ダイ側給液路３ａと主シリンダ内４Ａａを第１開閉弁Ｖ１を介して連通し、主シリンダ内４Ａａと副シリンダ内４Ｂａを第２開閉弁Ｖ２を介して連通し、副シリンダ内４Ｂａとダイ側給液路３ａの外側（本実施例ではタンクＴ）を第３開閉弁Ｖ３を介して逃がし路６４で連通してある。
【００６８】
前記制御装置６５は、断続バルブＶａ、圧送手段２の開閉弁Ｖｂ、吸引・圧送手段ＳＶの操作具６、第１開閉弁Ｖ１、第２開閉弁Ｖ２及び第３開閉弁Ｖ３に対する指令を、図１３に示すように発するものである。すなわち、基材Ｗに塗工域Ｃを形成する塗工帯では、断続バルブＶａに開の維持を、開閉弁Ｖｂに閉の維持をそれぞれ指令する。基材Ｗに非塗工域Ｇを形成する休止帯では、断続バルブＶａに閉の維持を、開閉弁Ｖｂに開の維持をそれぞれ指令する。塗工を行わない休止帯において吸引・圧送手段ＳＶの両ピストン５Ａ，５Ｂが引き移動しているとき（図中の時間帯Ｐ）は、第１開閉弁Ｖ１に開状態の維持を、第２開閉弁Ｖ２に開状態の維持を、第３開閉弁Ｖ３に閉状態の維持をそれぞれ指令する。休止帯において吸引・圧送手段ＳＶの両ピストン５Ａ，５Ｂが引き切っているとき（図中の時間帯Ｒ）は、第１開閉弁Ｖ１に開状態の維持を、第２開閉弁Ｖ２に閉を、第３開閉弁Ｖ３に開をそれぞれ指令する。塗工を行う塗工帯において吸引・圧送手段の両ピストン５Ａ，５Ｂが押し移動しているとき（図中の時間帯Ｊ）は、第１開閉弁Ｖ１に開状態の維持を、第２開閉弁Ｖ２に閉状態の維持を、第３開閉弁Ｖ３に開状態の維持をそれぞれ指令する。塗工帯において吸引・圧送手段ＳＶの両ピストン５Ａ，５Ｂが押し切っているとき（図中の時間帯Ｋ）の途中では、第１開閉弁Ｖ１に閉を、第２開閉弁Ｖ２に閉状態の維持を、第３開閉弁Ｖ３に開状態の維持をそれぞれ指令する。その後に吸引・圧送手段ＳＶの両ピストン５Ａ，５Ｂが押し切っているときには、該第１開閉弁に開を、該第２開閉弁に開を、該第３開閉弁に閉をそれぞれ指令する。
【００６９】
なお、前記第２開閉弁Ｖ２及び前記第３開閉弁Ｖ３は、開閉状態が逆となるため、図１２に示す一個の三方弁Ｖｃに置換することも可能である。
【００７０】
前記間欠塗工装置６１を用いた塗工方法は、図１１に示す断続バルブＶａを閉にしてダイ側給液路３ａに対する塗工液の圧送を停止して非塗工域Ｇを形成し、断続バルブＶａを開にしてダイ側給液路３ａへ圧送した塗工液をダイＤで塗工して塗工域Ｃを形成する。基材Ｗに非塗工域Ｇを形成するために断続バルブＶａを閉じるときは、第１開閉弁Ｖ１及び第２開閉弁Ｖ２を開くと共に第３開閉弁Ｖ３を閉じた状態にして、ダイ側給液路３ａの塗工液Ｍを吸引・圧送手段ＳＶの引き移動する両ピストン５Ａ，５Ｂで両シリンダ内４Ａａ，４Ｂａへ吸引（矢符ａ）して、ダイＤの吐出口Ｄａから塗工域Ｃの終端Ｃｂまで出ている塗工液Ｍ（図１６の図（ｃ）において破線Ｅで囲まれている部分）を吐出口Ｄａの内部へ吸引する。これにより、吐出口Ｄａにおける液切れを良好にすると共に、塗工域Ｃの終端Ｃｂが吐出口Ｄａの長手方向へ沿って一直線となるように終端Ｃｂをシャープに形成できる。吸引・圧送手段ＳＶの両ピストン５Ａ，５Ｂが引き切ったときには、第２開閉弁Ｖ２を閉じると共に第３開閉弁Ｖ３を開く。
【００７１】
また、基材Ｗに塗工域Ｃを形成するために断続バルブＶａを開くときは、第１開閉弁Ｖ１及び第３開閉弁Ｖ３を開き状態にすると共に第２開閉弁Ｖ２を閉じ状態にして、吸引・圧送手段ＳＶの両ピストン５Ａ，５Ｂを押し移動させて、吸引・圧送手段ＳＶの主シリンダ内４Ａａから圧送される塗工液Ｍをダイ側給液路３ａへ供給（矢符ａ）すると共に、副シリンダ内４Ｂａから圧送される余分の塗工液Ｍを逃がし路６４でダイ側給液路３ａの外側となるタンクＴへ逃がして（矢符ｃ）、塗工域Ｃにおける始端Ｃｔ側の塗工膜の厚みを調整できる。ダイ側給液路３ａへ供給する塗工液の量とタンクＴへ逃がす塗工液の量との割合は、主シリンダ４Ａの吸引量と副シリンダ４Ｂの吸引量を変更することで調整できる。主シリンダ４Ａ及び副シリンダ４Ｂの吸引量の変更は、各ピストン５Ａ，５ＢのストロークＳｔを変更して行うことができる。
【００７２】
塗工帯において両ピストン５Ａ，５Ｂが押し切っているときには、第２開閉弁Ｖ２を開くと共に第３開閉弁Ｖ３を閉じて、次の非塗工域Ｇの形成に備える。
【００７３】
（第７の実施の形態）
図１４及び図１５は第７の実施の形態の本発明塗工装置を示すものであって、図１４は全体の概略図、図１５は各弁及び吸引・圧送手段の動作タイミングを示すタイミングチャートである。
【００７４】
本実施の形態に係る間欠塗工装置７１は、前記間欠塗工装置１１（図１参照）と同様に、基材Ｗに塗工液Ｍを塗工するダイＤと、ダイＤへ塗工液Ｍを圧送する圧送手段２と、ダイＤと圧送手段２の間に設けて開閉を交互に繰り返す断続バルブＶａを備えており、ダイＤの構造、圧送手段２の構造及びダイＤの吐出口Ｄａと断続バルブＶａの間のダイ側給液路３ａの内容が前記間欠塗工装置１１のものと実質的に同一である。
【００７５】
本実施の形態に係る間欠塗工装置７１が前記間欠塗工装置１１（図１）と異なる所は、ダイＤの吐出口Ｄａと断続バルブＶａの間のダイ側給液路３ａに接合した吸引・圧送手段ＳＶの構造と、ダイ側給液路３ａと吸引・圧送手段ＳＶの接合構造と、吸引・圧送手段ＳＶとダイ側給液路３ａの外側を連通する逃がし路７４の構造と、制御装置７５の指令の内容である。
【００７６】
前記吸引・圧送手段ＳＶは、シリンダが個別の主シリンダ４Ａと複数のｎ個（２個以上）の副シリンダ４Ｂ−１〜４Ｂ−ｎからなり、ピスントが主シリンダ４Ａに挿入した主ピストン５Ａと各副シリンダ４Ｂ−１〜４Ｂ−ｎに挿入した副ピストン５Ｂ−１〜５Ｂ−ｎとからなり、これらピストン５Ａ，５Ｂ−１〜５Ｂ−ｎの押し引きを連動させ、ダイ側給液路３ａと主シリンダ内４Ａａを第１開閉弁Ｖ１を介して連通し、主シリンダ内４Ａａと各副シリンダ内４Ｂ−１ａ〜４Ｂ−ｎａを個別に第２開閉弁Ｖ２を介して連通し、各副シリンダ内４Ｂ−１ａ〜４Ｂ−ｎａとダイ側給液路３ａの外側を個別に第３開閉弁Ｖ３を介して連通してある。各副シリンダ４Ｂ−１〜４Ｂ−ｎに対応する各組の第１開閉弁Ｖ１及び第２開閉弁Ｖ２は、開閉状態が逆となるため、三方弁Ｖｃ−１〜Ｖｃ−ｎに置換してあるが、個別に設けることも可能である。
【００７７】
前記制御装置７５は、断続バルブＶａ、圧送手段２の開閉弁Ｖｂ、吸引・圧送手段ＳＶの操作具６、第１開閉弁Ｖ１、各組の第２開閉弁Ｖ２及び第３開閉弁Ｖ３に対する指令を、図１５に示すように発するものである。すなわち、制御装置７５は、塗工を行わない休止帯においては、任意個数（ｍ個）の副シリンダ内４Ｂ−１ａ〜４Ｂ−ｍａへ連通する三方弁Ｖｃ−１〜Ｖｃ−ｍの第２開閉弁Ｖ２に開状態の維持を、この任意個数（ｍ個）の副シリンダ内４Ｂ−１ａ〜４Ｂ−ｍａへ連通する三方弁Ｖｃ−１〜Ｖｃ−ｍの第３開閉弁Ｖ３に閉状態の維持をそれぞれ指令し、吸引・圧送手段ＳＶの全てのピストン５Ａ，５Ｂ−１〜５Ｂ−ｎが引き移動しているとき（図中の時間帯Ｐ）は、第１開閉弁Ｖ１に開状態の維持を、残りの三方弁Ｖｃ−（ｍ＋１）〜Ｖｃ−ｎの各第２開閉弁Ｖ２に開状態の維持を、残りの三方弁Ｖｃ−（ｍ＋１）〜Ｖｃ−ｎの第３開閉弁Ｖ３に閉状態の維持をそれぞれ指令する。休止帯において吸引・圧送手段ＳＶの全てのピストン５Ａ，５Ｂ−１〜５Ｂ−ｎが引き切っているとき（図中の時間帯Ｒ）には、第１開閉弁Ｖ１に開状態の維持を、残りの三方弁Ｖｃ−（ｍ＋１）〜Ｖｃ−ｎの各第２開閉弁Ｖ２に閉を、残りの三方弁Ｖｃ−（ｍ＋１）〜Ｖｃ−ｎの第３開閉弁Ｖ３に開をそれぞれ指令する。塗工を行う塗工帯において吸引・圧送手段ＳＶの全てピストン５Ａ，５Ｂ−１〜５Ｂ−ｎが押し移動しているとき（図中の時間帯Ｊ）には、第１開閉弁Ｖ１に開状態の維持を、残りの三方弁Ｖｃ−（ｍ＋１）〜Ｖｃ−ｎの各第２開閉弁Ｖ２に閉状態の維持を、残りの三方弁Ｖｃ−（ｍ＋１）〜Ｖｃ−ｎの第３開閉弁Ｖ３に開状態の維持をそれぞれ指令する。塗工帯において吸引・圧送手段ＳＶの全てのピストン５Ａ，５Ｂ−１〜５Ｂ−ｎが押し切っているとき（図中の時間帯Ｋ）の途中では、第１開閉弁Ｖ１に閉を、残りの三方弁Ｖｃ−（ｍ＋１）〜Ｖｃ−ｎの各第２開閉弁Ｖ２に閉状態の維持を、残りの三方弁Ｖｃ−（ｍ＋１）〜Ｖｃ−ｎの第３開閉弁Ｖ３に開状態の維持をそれぞれ指令する。その後に吸引・圧送手段ＳＶの全てのピストンピストン５Ａ，５Ｂ−１〜５Ｂ−ｎが押し切っているときには、第１開閉弁Ｖ１に開を、残りの三方弁Ｖｃ−（ｍ＋１）〜Ｖｃ−ｎの各第２開閉弁Ｖ２に開を、残りの三方弁Ｖｃ−（ｍ＋１）〜Ｖｃ−ｎの各第３開閉弁Ｖ３に閉をそれぞれ指令する。前述の如く副シリンダの個数は全部でｎで、任意個数はｍとなっている。なお、本実施の形態外ではあるが、副シリンダの個数を１（ｎ＝１）で、任意個数をゼロ（ｍ＝０）としたときには、前記間欠塗工装置６１（図１１乃至図１３）と実質的に同一となる。
【００７８】
前記間欠塗工装置７１を用いた塗工方法は、図１４に示す断続バルブＶａを閉にしてダイ側給液路３ａに対する塗工液の圧送を停止して非塗工域Ｇを形成し、断続バルブＶａを開にしてダイ側給液路３ａへ圧送した塗工液をダイＤで塗工して塗工域Ｃを形成する。基材Ｗに非塗工域Ｇを形成するために断続バルブＶａを閉じるときは、第１開閉弁Ｖ１及び全ての第２開閉弁Ｖ２を開くと共に全ての第３開閉弁Ｖ３を閉じた状態にして、吸引・圧送手段ＳＶの全てのピストン５Ａ，５Ｂ−１〜５Ｂ−ｎを引き移動して、ダイ側給液路３ａから全てのシリンダ内４Ａａ，４Ｂ−１ａ〜４Ｂ−ｎａへ塗工液Ｍを吸引させ、ダイＤの吐出口Ｄａから塗工域Ｃの終端Ｃｂまで出ている塗工液Ｍ（図１６の図（ｃ）において破線Ｅで囲まれている部分）を吐出口Ｄａの内部へ吸引する。これにより、吐出口Ｄａにおける液切れを良好にすると共に、塗工域Ｃの終端Ｃｂが吐出口Ｄａの長手方向へ沿って一直線となるように終端Ｃｂをシャープに形成できる。吸引・圧送手段ＳＶの全てのピストン５Ａ，５Ｂ−１〜５Ｂ−ｎが引き切ったときには、前記三方弁Ｖｃ−（ｍ＋１）〜Ｖｃ−ｎの各組の第２開閉弁Ｖ２を閉じると共に第３開閉弁Ｖ３を開く。
【００７９】
また、基材Ｗに塗工域Ｃを形成するために断続バルブＶａを開くときは、第１開閉弁Ｖ１及び前記三方弁Ｖｃ−（ｍ＋１）〜Ｖｃ−ｎの各組の第３開閉弁Ｖ３を開き状態にすると共に前記三方弁Ｖｃ−（ｍ＋１）〜Ｖｃ−ｎの各組の第２開閉弁Ｖ２を閉じ状態にして、吸引・圧送手段ＳＶの全てピストンを押し移動させることにより、吸引・圧送手段ＳＶの主シリンダ内４Ａａ及び前記三方弁Ｖｃ−１〜Ｖｃ−ｍの各シリンダ内４Ｂ−１ａ〜４Ｂ−ｍａから圧送される塗工液Ｍをダイ側給液路３ａへ供給（矢符ｂ）すると共に、前記三方弁Ｖｃ−（ｍ＋１）〜Ｖｃ−ｎの各シリンダ内４Ｂ−（ｍ＋１）ａ〜４Ｂ−ｎａから圧送される余分の塗工液Ｍを逃がし路７４でダイ側給液路３ａの外側となるタンクＴへ逃がし（矢符ｃ）、塗工域Ｃにおける始端Ｃｔ側の塗工膜の厚みを調整できる。ダイ側給液路３ａへ供給する塗工液の量とタンクＴへ逃がす塗工液の量との割合は、任意個数ｍを変更することで調整できる。この変更は、前記制御装置７５で行うことができるようになっている。
【００８０】
塗工帯において全てピストンが押し切っているときには、前記三方弁Ｖｃ−（ｍ＋１）〜Ｖｃ−ｎの各組の第２開閉弁Ｖ２を開くと共に第３開閉弁Ｖ３を閉じて、次の非塗工域Ｇの形成に備える。
【００８１】
【発明の効果】
請求項１記載の本発明塗工装置は、塗工域の塗工を開始するとき、吸引・圧送手段のシリンダ内から圧送される塗工液の一部をダイ側給液路へ供給すると共に、その塗工液の残りをダイ側給液路の外側へ逃がすことで、塗工域における始端側の塗工膜の厚みを調整できる。
【００８２】
請求項２記載の本発明塗工装置は、塗工域の塗工を開始するとき、吸引・圧送手段のシリンダ内からダイ側給液路へ供給する塗工液の量とダイ側給液路の外側へ逃がす塗工液の量との割合を、リリーフ弁の設定圧力を変更することで、塗工域における始端側の塗工膜の厚みを調整できる。
【００８３】
請求項３記載の本発明塗工装置は、塗工域の塗工を開始するとき、吸引・圧送手段のシリンダ内からダイ側給液路へ供給する塗工液の量とダイ側給液路の外側へ逃がす塗工液の量との割合を、吸引・圧送手段のピストンを押し移動させている途中における第１開閉弁を開き且つ第２開閉弁を閉じるタイミングを変更することで、塗工域における始端側の塗工膜の厚みを調整できる。
【００８４】
請求項４記載の本発明塗工装置は、塗工域の塗工を開始するとき、吸引・圧送手段のシリンダ内からダイ側給液路へ供給する塗工液の量とダイ側給液路の外側へ逃がす塗工液の量との割合を、第１流量調整弁及び第２流量調整弁の流量を変更することで、塗工域における始端側の塗工膜の厚みを調整できる。
【００８５】
請求項５記載の本発明塗工装置は、塗工域の塗工を開始するとき、第１吸引・圧送手段のシリンダ内から圧送されてダイ側給液路へ向かう塗工液の一部を第２吸引・圧送手段の吸引状態のシリンダ内へ吸引させることで、塗工域における始端側の塗工膜の厚みを確実に調整できる。
【００８６】
請求項６記載の本発明塗工装置は、二つの逆止弁を用いる簡単な構造で、吸引・圧送手段の両ピストンが押し移動しているときに、主シリンダ内の塗工液をダイ側給液路へ供給すると共に副シリンダ内の塗工液をダイ側給液路の外側へ逃がすことで、塗工域における始端側の塗工膜の厚みを調整できる。
【００８７】
請求項７記載の本発明装置は、吸引・圧送手段の両ピストンが押し移動しているときには、主シリンダ内から所定量の塗工液をダイ側給液路へ供給すると共に、副シリンダ内から所定量の塗工液をダイ側給液路の外側へ逃がすことで、塗工域における始端側の塗工膜の厚みを一定に調整できる。
【００８８】
請求項８記載の本発明塗工装置は、ピストンが押し移動しているときに、塗工液をダイ側給液路へ供給する副シリンダの個数と塗工液をダイ側給液路の外側へ逃がす副シリンダの個数を変更することで、塗工域における始端側の塗工膜の厚みを簡単に調整できる。
【図面の簡単な説明】
【図１】本発明塗工装置の第１の実施の形態を示す全体の概略図である。
【図２】本発明塗工装置の第２の実施の形態を示す全体の概略図である。
【図３】第２の実施の形態において第１開閉弁及び第２開閉弁を三方弁で構成したときの全体の概略図てある。
【図４】第２の実施の形態における各弁及び吸引・圧送手段の動作タイミングを示すタイミングチャートである。
【図５】本発明塗工装置の第３の実施の形態を示す全体の概略図である。
【図６】第３の実施の形態において第１開閉弁及び第２開閉弁を三方弁で構成したときの全体の概略図である。
【図７】第３の実施の形態における各弁及び吸引・圧送手段の動作タイミングを示すタイミングチャートである
【図８】本発明塗工装置の第４の実施の形態を示す全体の概略図である。
【図９】第４の実施の形態における各弁及び吸引・圧送手段の動作タイミングを示すタイミングチャートである。
【図１０】本発明塗工装置の第５の実施の形態を示す全体の概略図である。
【図１１】本発明塗工装置の第６の実施の形態を示す全体の概略図である。
【図１２】第６の実施の形態において第１開閉弁及び第２開閉弁を三方弁で構成したときの全体の概略図である。
【図１３】第６の実施の形態における各弁及び吸引・圧送手段の動作タイミングを示すタイミングチャートである。
【図１４】本発明塗工装置の第７の実施の形態を示す全体の概略図である。
【図１５】第７の実施の形態における各弁及び吸引・圧送手段の動作タイミングを示すタイミングチャートである。
【図１６】従来の間欠塗工装置を示すものであり、図（ａ）は全体の概略図、図（ｂ）は図（ａ）中のｂ部分の拡大図、図（ｃ）は図（ａ）中のｃ部分の拡大図である。
【符号の説明】
Ｄ…ダイ、Ｖａ…断続バルブ、Ｍ…塗工液、２…圧送手段、３ａ…ダイ側給液路、４ａ…シリンダ内、５…ピストン、ＳＶ…吸引・圧送手段、１２…逃がし手段、１３…リリーフ弁、１４…逃がし路[0001]
BACKGROUND OF THE INVENTION
The present invention alternately forms a coating area and a non-coating area on a base material by repeatedly discharging and stopping from the die when the coating liquid is discharged from the die and applied to the base material. The present invention relates to an intermittent coating apparatus.
[0002]
[Prior art]
Conventionally, as shown in the schematic diagram of FIG. 16, the intermittent coating apparatus 1 includes a die D for coating the substrate W with the coating liquid M, a pressure feeding means 2 for pumping the coating liquid to the die D, and a die D. The piston 5 is connected to the inside 4a of the cylinder 4 joined to the die side liquid supply passage 3a between the discharge port Da of the die D and the intermittent valve Va. A suction / pumping means SV inserted so as to be freely pushed and pulled is provided. The coating is performed by relatively moving the base material W and the die D. For example, when the base material W is run and the die D is stopped, and when the base material W is stopped and the die D is run There is.
[0003]
The conventional intermittent coating apparatus 1 opens the intermittent valve Va, and coats the base material W with the coating liquid M that is pumped from the pumping means 2 to the die-side liquid supply path 3a. The coating area C is formed, the intermittent valve Va is closed, the feeding of the coating liquid to the die-side liquid supply path 3a is stopped, and the non-coating area G is formed on the substrate W. By the way, simply by closing the intermittent valve Va, the coating liquid M remaining in the die-side liquid supply path 3a may be exuded from the discharge port Da of the die D because it is in a pressurized state. Therefore, when the non-coating area G is formed, the intermittent coating apparatus 1 uses the piston 5 that is pulled and moved by the suction / pressure feeding means SV in parallel with the closing of the intermittent valve Va, from the die side liquid supply path 3a to the inside 4a of the cylinder. The coating liquid M is sucked (arrow a) so that the liquid breakage at the discharge port Da of the die D is improved. In addition, the intermittent coating apparatus 1 has a coating liquid M (broken line E in the figure (c) in the figure) that is discharged from the discharge port Da of the die D to the end Cb of the coating area C when the intermittent valve Va is closed. The portion surrounded by (3) is sucked into the discharge port Da of the die D by suction of the suction / pressure feeding means SV so that the end of the coating area C is sharply formed.
[0004]
Furthermore, since the conventional intermittent coating apparatus 1 has a large passage resistance of the coating liquid M in the die side liquid supply path 3a, it is necessary for coating from the discharge port Da of the die D only by opening the intermittent valve Va. The coating liquid at a flow rate is gradually discharged without being instantaneously discharged. Therefore, the intermittent coating apparatus 1 is configured so that the suction / pressure feeding means SV is pushed and moved in parallel with the opening of the intermittent valve Va to form the coating area C, and the die side liquid supply path 3a from the cylinder 4a. The coating liquid is rapidly pumped (arrow b), and a predetermined flow rate of the coating liquid is instantaneously discharged from the discharge port Da of the die D so that the start end Ct of the coating area C is sharply formed. ing.
[0005]
[Problems to be solved by the invention]
By the way, the suction / pressure feeding means SV discharges all of the coating liquid sucked into the cylinder 4a in parallel with closing the intermittent valve Va from the cylinder 4a when the intermittent valve Va is opened. You must be prepared for. However, when the intermittent coating apparatus 1 opens the intermittent valve Va, when all the coating liquid sucked into the cylinder 4a is rapidly pumped to the die side liquid supply path 3a, the discharge port Da of the die D is discharged. There is a problem that the coating liquid discharged from the liquid becomes excessive and the coating film thickness on the start end Ct side of the coating area C is locally increased (see FIG. 5B), and the film thickness on the start end side cannot be adjusted. . In order to solve this problem, it is conceivable to control the speed of the suction / pressure feeding means SV during the pushing movement of the piston 5, but the stroke St that the piston 5 pushes and pulls is short and the movement of the piston 5 is fast. Speed control is practically difficult.
[0006]
Therefore, in order to solve the above problems, the present invention is to provide an intermittent coating apparatus capable of adjusting the film thickness on the start end side of the coating area.
[0007]
[Means for Solving the Problems]
The means employed by the present invention as set forth in claim 1 is provided between a die for coating the substrate with the coating liquid, a pressure feeding means for pumping the coating liquid to the die, and between the die and the pressure feeding means. An intermittent valve and a suction / pressure feeding means for sucking or feeding the coating liquid in communication with the die side liquid supply path between the die and the intermittent valve are provided, and when the intermittent valve is closed, the die side liquid supply path In the intermittent coating apparatus for sucking the coating liquid to the suction / pressure feeding means and opening the intermittent valve, the suction / pressure feeding means pumps the coating liquid from the suction / pressure feeding means to the die side liquid supply path. The die-side liquid supply path and the outside of the die-side liquid supply path are communicated by an escape means that can adjust the escape amount, and a part of the coating liquid pumped from the suction / pressure feed means is released by the die-side supply. The intermittent coating apparatus is characterized in that it escapes to the outside of the liquid path. The suction / pressure feeding means may be constituted by a piston inserted into a cylinder communicating with the die side liquid supply path so as to be able to push and pull.
[0008]
In the present invention according to claim 1, when the coating liquid is pumped from the suction / pumping means to the die side liquid supply path, a part of the pumped coating liquid is released to the outside of the die side liquid supply path. By not supplying to the die side liquid supply path, the thickness of the coating film on the start end side in the coating area can be adjusted.
[0009]
The means employed by the present invention as set forth in claim 2 is provided between a die for coating the substrate with the coating liquid, a pressure feeding means for pumping the coating liquid to the die, and between the pressure feeding means and the die. An intermittent valve, and a suction / pressure feeding means in which a piston is pushed and pulled into a cylinder communicating with a die side liquid supply path between the die and the intermittent valve, and the suction / pressure feeding means is closed when the intermittent valve is closed. The piston draws the coating liquid from the die side liquid supply path into the cylinder, and when opening the intermittent valve, the piston pushed by the suction / pumping means pushes the coating liquid from the cylinder to the die side liquid supply path. In the intermittent coating apparatus for pressure feeding, the inside of the cylinder or the outside of the die side liquid supply path and the outside of the die side liquid supply path are communicated by a relief path provided with a relief valve, and the cylinder is pressed by a piston pushed by the suction / pressure feeding means The relief pump is fed from the inside. Pressure a coating liquid over the pressure, which is intermittent coating apparatus characterized by in to the 該逃 passage released to the outside of the die-side liquid supplying passage.
[0010]
In the present invention of claim 2, when the coating liquid is pumped from the inside of the cylinder to the die-side liquid supply path by the piston that is pushed and moved by the suction / pressure feeding means, the high-pressure coating that exceeds the set pressure of the relief valve is applied. The thickness of the coating film on the start side in the coating area is released by letting the working liquid escape to the outside of the die-side liquid supply path and supplying the low-pressure coating liquid that does not reach the set pressure of the relief valve to the die-side liquid supply path. Can be adjusted.
[0011]
The means adopted by the present invention according to claim 3 is provided with a die for coating the substrate with the coating liquid, a pressure feeding means for pumping the coating liquid to the die, and between the pressure feeding means and the die. Intermittent valve, suction / pumping means inserted into the cylinder communicating with the die side liquid supply path between the die and the intermittent valve so that the piston can be freely pushed and pulled, and commanding the piston to push / pull to the suction / pressure feeding means And a control device that commands opening / closing of the intermittent valve, and when the intermittent valve is closed, a piston pulled by the suction / pressure feeding means sucks the coating liquid from the die side liquid supply path into the cylinder, and the intermittent valve In an intermittent coating apparatus in which coating liquid is pumped from the cylinder to the die side liquid supply path by a piston pushed by the suction / pressure feeding means when the valve is opened, the die side liquid supply path and the cylinder are first opened and closed. Communicating with the inside of the cylinder and the die The outside of the liquid supply path is communicated via a second on-off valve, and the control device opens the first on-off valve when the piston of the suction / pressure feeding means has been pulled off after starting the pulling movement. The second on-off valve is instructed to maintain the closed state, and the piston of the suction / pressure feeding means is pushed and moved while the first on-off valve is closed, and the second on-off valve is closed. When opening is commanded, and when the piston of the suction / pressure feeding means is pushed down, the first on-off valve is instructed to maintain the closed state, and the second on-off valve is instructed to maintain the open state. It is an intermittent coating device. The first on-off valve and the second on-off valve can be integrally formed with a three-way valve.
[0012]
In the third aspect of the present invention, the first on-off valve is opened until the coating liquid is pumped from the inside of the cylinder to the die-side liquid supply path by the piston that is pushed and moved by the suction / pressure feeding means, and When the second on-off valve is closed, the coating liquid is supplied to the die side liquid supply passage, and when reaching the middle, the first on-off valve is closed and the second on-off valve is opened. The thickness of the coating film on the start end side in the coating area can be adjusted by allowing the coating liquid to be pumped to escape to the outside of the die side liquid supply path.
[0013]
  The means employed by the present invention as set forth in claim 4 is provided between a die for coating the substrate with the coating liquid, a pressure feeding means for pumping the coating liquid to the die, and between the die and the pressure feeding means. Intermittent valve, suction / pumping means inserted into the cylinder communicating with the die side liquid supply path between the die and the intermittent valve so that the piston can be freely pushed and pulled, and commanding the piston to push / pull to the suction / pressure feeding means And a control device that commands opening / closing of the intermittent valve, and when the intermittent valve is closed, a piston pulled by the suction / pressure feeding means sucks the coating liquid from the die side liquid supply path into the cylinder, and the intermittent valve In an intermittent coating apparatus in which coating liquid is pumped from the cylinder to the die side liquid supply path by a piston pushed by the suction / pressure feeding means when the valve is opened, the die side liquid supply path and the cylinder are first opened and closed. Communicating through a valve, second opening and closing in the cylinder Communicating the one end, the other end of the second on-off valve die-side liquid supply path of the first flow rate control valveAnd the third on-off valveThe other end of the second on-off valve communicates with the outside of the die-side liquid supply path via a second flow rate adjusting valve, and the control device is configured to pull and move the piston of the suction / pressure feeding means. The first on-off valve is instructed to maintain the open state and the second on-off valve is instructed to maintain the closed state. When the piston of the suction / pressure feeding means is pulled off, the first on-off valve The valve is closed and the second opening / closing valve is instructed to open. When the piston of the suction / pressure feeding means is pushed and moved, the first opening / closing valve is kept closed, and the second opening / closingAnd the third on-off valveWhen maintaining the open state, respectively, and when the piston of the suction / pumping means is pushed down,After instructing the third on-off valve to close,The intermittent coating apparatus is characterized by instructing the first on-off valve to open and the second on-off valve to close. In addition,in frontThe first on-off valve and the second on-off valve can be integrally formed with a three-way valve.
[0014]
In the present invention described in claim 4, coating is performed on the die-side liquid supply path until the coating liquid is pumped from the cylinder to the die-side liquid supply path by the piston that is pushed and moved by the suction / pressure-feeding means. A part of the coating liquid that is fed from the inside of the cylinder is supplied to the die side liquid supply path via the first flow rate adjusting valve, and the remaining coating liquid is supplied to the second flow rate. The thickness of the coating film on the start end side in the coating area can be adjusted by letting it escape to the outside of the die side liquid supply path via the regulating valve. The ratio between the amount of the coating liquid supplied to the die side liquid supply path and the amount of the coating liquid released to the outside of the die side liquid supply path after this midway is determined by each of the first flow rate adjustment valve and the second flow rate adjustment valve. It can be adjusted by changing the flow rate.
[0015]
The means adopted by the present invention as set forth in claim 5 is provided with a die for coating the substrate with the coating liquid, a pressure feeding means for pumping the coating liquid to the die, and between the pressure feeding means and the die. An intermittent valve, a first suction / pressure feeding means in which a piston is pushed and pulled into a cylinder communicating with a die side liquid supply path between the die and the intermittent valve, and a piston is connected to the first suction / pressure feeding means. A control device for commanding push / pull and commanding opening / closing of the intermittent valve is provided, and when the intermittent valve is closed, the piston is pulled by the first suction / pressure feeding means to apply the coating liquid from the die side liquid supply path into the cylinder. In the intermittent coating apparatus in which the coating liquid is pumped from the inside of the cylinder to the die side liquid feeding path by the piston pushed by the first suction / pressure feeding means when the intermittent valve is opened, the die side liquid feeding path And at least one in the cylinder of the first suction / pressure feeding means A second suction / pumping means for inserting a piston into a cylinder communicating with the first through an on-off valve so that the suction amount into the cylinder is smaller than the suction amount of the first suction / pressure feeding means. And connecting the inside of the cylinder of the second suction / pressure feeding means and the outside of the die side liquid supply path via a second on-off valve, and the control device pulls and moves the piston of the first suction / pressure feeding means The first on-off valve is instructed to maintain the closed state, the second on-off valve is instructed to be in the closed state, and the second suction / pressure-feeding means is instructed to maintain the piston push-off state. When the piston of the pressure feeding means is pulled, the first on-off valve is opened, the second on-off valve is maintained in the closed state, and the second suction / pressure feeding means is instructed to maintain the piston push-off state, The piston of the first suction / pressure feeding means is pushed and moved The first on-off valve is maintained in the open state, the second on-off valve is maintained in the closed state, the second suction / pressure feeding means is instructed to pull the piston, and the first suction / pressure feeding means While the piston is being pushed all the way, the first on-off valve is closed, the second on-off valve is opened, the second suction / pressure feeding means is instructed to push the piston, and then the first suction / pressure feeding means When the piston is pushed down, the first on-off valve is instructed to maintain the closed state, the second on-off valve is closed, and the second suction / pressure feeding means is instructed to maintain the piston in the closed state. It is a coating device.
[0016]
In the present invention described in claim 5, when the piston of the first suction / pressure feeding means is pulled, the coating liquid is sucked from the die side liquid supply path into the piston of the first suction / pressure feeding means. When the piston of the first suction / pressure feeding means is pushed and moved, a part of the coating liquid fed from the cylinder of the first suction / pressure feeding means is supplied to the die side liquid supply path and the remaining coating is applied. The thickness of the coating film on the start end side in the coating area can be adjusted by sucking the working liquid into the suctioned cylinder of the second suction / pumping means.
[0017]
The means employed by the present invention as set forth in claim 6 is provided between a die for coating the substrate with the coating liquid, a pressure feeding means for pumping the coating liquid to the die, and between the pressure feeding means and the die. Intermittent valve, suction / pumping means inserted into the cylinder communicating with the die side liquid supply path between the die and the intermittent valve so that the piston can be freely pushed and pulled, and commanding the piston to push / pull to the suction / pressure feeding means And a control device that commands opening / closing of the intermittent valve, and when the intermittent valve is closed, a piston pulled by the suction / pressure feeding means sucks the coating liquid from the die side liquid supply path into the cylinder, and the intermittent valve In the intermittent coating apparatus in which the coating liquid is pumped from the inside of the cylinder to the die side liquid supply path by a piston pushed by the suction / pressure feeding means when the valve is opened, the suction / pressure feeding means includes a main cylinder having a separate cylinder And the secondary cylinder. Consists of a main piston inserted into the main cylinder and a sub-piston inserted into the sub-cylinder, and the reverse flow toward the die-side liquid supply path through the die-side liquid supply path and the sub-cylinder by interlocking the pushing and pulling of both pistons The first check valve is used for communication, and the inside of the sub cylinder and the outside of the die side liquid supply passage are connected by a second check valve for preventing back flow toward the sub cylinder. It is an intermittent coating device.
[0018]
In the present invention described in claim 6, when both pistons of the suction / pumping means are pulled and moved, the coating liquid is sucked from the die side liquid supply passage into the main and sub cylinders, and suction / pumping is performed. When both pistons of the means are moving, the coating liquid in the main cylinder is supplied to the die side liquid supply path and the coating liquid in the sub cylinder is released to the outside of the die side liquid supply path. The thickness of the coating film on the start end side in the work area can be adjusted.
[0019]
The means adopted by the present invention as set forth in claim 7 is provided with a die for coating the substrate with the coating liquid, a pressure feeding means for pumping the coating liquid to the die, and between the pressure feeding means and the die. Intermittent valve, suction / pumping means inserted into the cylinder communicating with the die side liquid supply path between the die and the intermittent valve so that the piston can be freely pushed and pulled, and commanding the piston to push / pull to the suction / pressure feeding means And a control device that commands opening / closing of the intermittent valve, and when the intermittent valve is closed, a piston pulled by the suction / pressure feeding means sucks the coating liquid from the die side liquid supply path into the cylinder, and the intermittent valve In the intermittent coating apparatus in which the coating liquid is pumped from the inside of the cylinder to the die side liquid supply path by a piston pushed by the suction / pressure feeding means when the valve is opened, the suction / pressure feeding means includes a main cylinder having a separate cylinder And the secondary cylinder. Comprises a main piston inserted into the main cylinder and a sub-piston inserted into the sub-cylinder, interlocking the pushing and pulling of both pistons, and communicating the die side liquid supply path and the inside of the main cylinder via the first on-off valve, The inside of the main cylinder and the inside of the sub cylinder are communicated via a second on-off valve, and the inside of the sub cylinder and the outside of the die side liquid supply passage are communicated via a third on-off valve. When both pistons of the suction / pressure feeding means are moving, the first on-off valve is kept open, the second on-off valve is kept open, and the third on-off valve is kept closed. When both pistons of the suction / pressure feeding means are pulled apart, the first on-off valve is kept open, the second on-off valve is closed, and the third on-off valve is opened. When the piston of the suction / pumping means is pushing and moving, The first on-off valve is instructed to maintain the open state, the second on-off valve is maintained to be in the closed state, and the third on-off valve is instructed to maintain the open state. Then, the first on-off valve is closed, the second on-off valve is instructed to maintain the closed state, and the third on-off valve is instructed to maintain the open state. In the intermittent coating apparatus, the first on-off valve is commanded to open, the second on-off valve is opened, and the third on-off valve is closed.
[0020]
In the present invention according to claim 7, when both pistons of the suction / pressure feeding means are pulled, the coating liquid is sucked into the main and sub cylinders from the die side liquid supply passage, When both pistons of the pressure feeding means are moving, the coating liquid in the main cylinder is supplied to the die side liquid supply path and the coating liquid is allowed to escape from the sub cylinder to the outside of the die side liquid supply path. The thickness of the coating film on the start end side in the coating area can be adjusted.
[0021]
The means adopted by the present invention as set forth in claim 8 is provided with a die for coating the substrate with the coating liquid, a pressure feeding means for pumping the coating liquid to the die, and between the pressure feeding means and the die. Intermittent valve, suction / pumping means inserted into the cylinder communicating with the die side liquid supply path between the die and the intermittent valve so that the piston can be freely pushed and pulled, and commanding the piston to push / pull to the suction / pressure feeding means And a control device that commands opening / closing of the intermittent valve, and when the intermittent valve is closed, a piston pulled by the suction / pressure feeding means sucks the coating liquid from the die side liquid supply path into the cylinder, and the intermittent valve In the intermittent coating apparatus in which the coating liquid is pumped from the inside of the cylinder to the die side liquid supply path by a piston pushed by the suction / pressure feeding means when the valve is opened, the suction / pressure feeding means includes a plurality of the cylinder and the main cylinder. Each of the sub cylinders, The piston comprises a main piston inserted into the main cylinder and sub-pistons inserted into the sub-cylinders. The piston side push-pull is interlocked, and the die side liquid supply passage and the main cylinder are connected via the first on-off valve. The main cylinder and each sub-cylinder are individually communicated with each other via a second on-off valve, and the inside of each sub-cylinder and the outside of the die side liquid supply path are individually connected via a third on-off valve. The control device commands the second on-off valve communicating with any number of sub-cylinders to maintain the open state and the third on-off valve communicating with any number of sub-cylinders to maintain the closed state, respectively. When the pistons of the suction / pressure feeding means are moving, the first on-off valve is kept open, the remaining second on-off valves are kept open, and the remaining third on-off valves are kept open. The maintenance of the closed state is instructed respectively, and the suction / pressure feeding means When these pistons are disengaged, the first on-off valve is instructed to maintain an open state, the remaining second on-off valves are closed, and the remaining third on-off valves are instructed to open. When the pistons are moving, the first open / close valve is instructed to maintain the open state, the remaining second open / close valve is maintained in the closed state, and the remaining third open / close valve is instructed to maintain the open state. While the piston of the suction / pressure feeding means is being pushed all the way, the first on-off valve is closed, the remaining second on-off valves are kept closed, and the remaining third on-off valves are kept open. When each of the pistons of the suction / pressure feeding means is pushed down, the first on-off valve is opened, the remaining second on-off valves are opened, and the remaining third on-off valves are closed. It is an intermittent coating apparatus characterized by performing.
[0022]
In the present invention according to claim 8, when all the pistons of the suction / pressure feeding means are pulled and moved, the coating liquid is sucked into all the cylinders from the die side liquid supply path, and the suction / pressure feeding means. When all of the pistons are moving, the coating liquid is supplied from the main cylinder and any number of sub-cylinders to the die-side supply passage, and the coating liquid is supplied from the remaining sub-cylinders to the die side. By letting it escape to the outside of the liquid path, the thickness of the coating film on the start end side in the coating area can be adjusted.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an intermittent coating apparatus according to the present invention (hereinafter referred to as “the present invention coating apparatus”) will be described based on an embodiment shown in the drawings.
[0024]
(First embodiment)
FIG. 1 is an overall schematic view showing a first embodiment of the coating apparatus of the present invention.
[0025]
The intermittent coating apparatus 11 according to the present embodiment is similar to the above-described conventional intermittent coating apparatus 1 (see FIG. 16). Pressure feeding means 2 for feeding the working fluid M, an intermittent valve Va provided between the die D and the pressure feeding means 2 and alternately opening and closing, and a die-side liquid supply path between the discharge port Da of the die D and the intermittent valve Va A suction / pressure feeding means SV joined to 3a, a suction / pressure feeding means SV, an intermittent valve Va, and a control device 15 for controlling an on-off valve Vb to be described later are provided. The die-side liquid supply path 3a communicates the discharge port Da of the die D and the intermittent valve Va. The liquid path portion formed inside the die D and the outside of the die D are joined to the die D. It consists of a piping part.
[0026]
The suction / pressure feeding means SV communicates with the die-side liquid supply path 3a and sucks the coating liquid M from the die-side liquid supply path 3a or pumps the coating liquid M to the die-side liquid supply path 3a. It is configured. The suction / pressure feeding means SV of the present embodiment includes a cylinder 4 communicating with the die side liquid supply path 3a, a piston 5 inserted into the inner side 4a of the cylinder 4 so as to be freely pushed and pulled, and a pneumatic cylinder for pushing and pulling the piston 5 or An operation tool 6 including a solenoid or the like is provided, and the coating liquid M is sucked from the die-side liquid supply path 3a into the cylinder 4a as the piston 5 is pulled, and the die-side supply is performed from the cylinder 4a as the piston 5 is pushed. The coating liquid M is pumped to the liquid path 3a. The suction / pressure feeding means SV may be able to change the stroke St in which the piston 5 moves.
[0027]
The die D forms a part of the die side liquid supply passage 3a at the boundary between the two lip members Db and Dc joined so as to be separable, and opens a slit-like discharge port Da at the tip of the boundary. ing. The die D is adapted to be capable of adjusting various gaps (for example, 50 to 250 μm) between the lip members Db and Dc, which are the thickness of the discharge port Da, and to cope with various coating conditions.
[0028]
The pressure feeding means 2 includes a tank T for storing the coating liquid M, a liquid supply path 3 including a pipe extending from the tank T and joined to the die D, and an upstream side provided in the middle of the liquid supply path 3. A pump P and a downstream intermittent valve Va, a return liquid passage 7 including a pipe extending from the pump P to the tank T between the intermittent valve Va, and an on-off valve Vb disposed in the middle of the return liquid path 7 are provided. ing. When the intermittent valve Va is open, the pressure feeding means 2 closes the on-off valve Vb and pressure-feeds the coating liquid M to the die D, and when the intermittent valve Va is closed, the on-off valve Vb is opened and the coating liquid M is tanked. By returning to T, continuous operation of the pump P is ensured. The intermittent valve Va and the open / close valve Vb are opened and closed by a solenoid or the like. Note that the intermittent valve Va and the open / close valve Vb are reversely opened and closed, and can be replaced with a single three-way valve.
[0029]
The form of coating using the intermittent coating apparatus 11 is performed by relative movement of the base material W and the die D, for example, an aspect in which the base material W is run and the die D is stopped (the former aspect), There is a mode (the latter mode) in which the substrate D is stopped and the die D is run. As an example of the former mode, although not shown in the figure, the coating liquid discharged from the discharge port Da of the fixed die D is applied to the surface of the base material W that is wound around a backup roll that is rotationally driven at a constant speed. There is something to coat. As an example of the latter aspect, there is one in which the coating liquid M discharged from the discharge port Da of the die D moving along the surface of the substrate W is applied to the surface of the substrate W fixed to the fixed platen. . As the base material W, a continuous material such as a plastic film is selected in the former embodiment, and a material cut into an appropriate length such as a glass plate is selected in the latter embodiment. As the coating liquid M, a liquid applied to a battery or a liquid crystal plate is selected. As the posture of the die D, illustration is omitted except when the discharge direction of the discharge port Da is oriented horizontally, but the discharge direction of the discharge port Da may be directed downward or upward, which is optimal depending on the coating conditions. Is selected. The selection of the posture of the die D is performed together with the selection of the former aspect or the latter aspect.
[0030]
The improvement of the intermittent coating apparatus 11 according to the present embodiment is that the suction / pressure feeding means SV and the outside of the die side liquid supply path 3a, or the outside of the die side liquid supply path 3a and the die side liquid supply path 3a are released. It is configured to communicate with the escape means 12 whose amount can be adjusted, and to send a part of the coating liquid M pumped from the suction / pressure feed means SV (arrow b) to the outside of the die side liquid supply path 3a with the escape means 12. That is. Due to this improvement, the intermittent coating apparatus 11 allows a part of the coating liquid M to go outside the die side liquid supply path 3a when the coating liquid M is pumped from the suction / pressure feeding means SV to the die side liquid supply path 3a. The thickness of the coating film on the start end Ct side in the coating area C can be adjusted by not letting it escape and supplying it to the die-side liquid supply path 3a. In the present embodiment, the inside of the cylinder 4a of the suction / pressure feeding means SV or the outside of the die side liquid supply path 3a and the die side liquid supply path 3a (the tank T in the present embodiment) is provided with the escape means 12 capable of adjusting the escape amount. A part of the coating liquid M that is communicated and pumped from the cylinder 4a by the piston 5 pushed by the suction / pressure feeding means SV (arrow b) is escaped by the means 12 to the outside of the die side liquid supply path 3a. It is. As a result, the intermittent coating apparatus 11 uses the piston 5 pushed by the suction / pressure feeding means SV to pump the coating liquid M from the cylinder 4a to the die-side liquid supply path 3a. The thickness of the coating film on the start end Ct side in the coating area C can be adjusted by letting a part escape to the outside of the die side liquid supply path 3a and not supplying the die side liquid supply path 3a.
[0031]
The escape means 12 is provided in the cylinder side 4a of the die side liquid supply path 3a or the suction / pressure feed means SV and the outside of the die side liquid supply path 3a (in this embodiment, the tank T). The high-pressure coating liquid M that is pumped from the cylinder 4 a by the piston 5 pushed by the suction / pressure feeding means SV and exceeds the set pressure of the relief valve 13 is released to the outside of the die-side liquid feed path 3 a through the escape path 14. It is configured to escape. By adjusting the set pressure, the relief valve 13 can change the amount of excess coating liquid M that escapes to the escape path 14 and can adjust the thickness of the coating film on the start end Ct side in the coating area C.
[0032]
The control device 15 issues commands to the suction / pressure feeding means SV, the intermittent valve Va, and the on-off valve Vb, and controls them as follows. When closing the intermittent valve Va in order to stop the coating, the on-off valve Vb is opened and the piston 5 of the suction / pressure feeding means SV is pulled, and conversely, the intermittent valve Va is opened to resume the coating. In some cases, the on-off valve Vb is closed and the piston 5 of the suction / pressure feeding means SV is pushed and moved. While the coating is stopped, the intermittent valve Va is closed, the open / close valve Vb is open, and the piston 5 of the suction / pressure feeding means SV is pulled off. Conversely, during the coating, the intermittent valve Va is closed. Each of the open state, the closed state of the on-off valve Vb, and the push-off state of the piston 5 of the suction / pressure feeding means SV is maintained.
[0033]
In the coating method using the intermittent coating apparatus 11, the intermittent valve Va is closed to stop the pumping of the coating liquid to the die side liquid supply path 3a to form the non-coating area G, and the intermittent valve Va is A coating area C is formed by coating the coating liquid, which is opened and pumped to the die side liquid supply path 3a, with the die D. When the intermittent valve Va is closed in order to form the non-coating area G on the substrate W, the coating liquid M in the die side liquid supply path 3a is moved to the inside 4a of the cylinder by the piston 5 which is pulled and moved by the suction / pressure feeding means SV. The coating liquid M (the part surrounded by the broken line E in FIG. 16C) drawn from the discharge port Da of the die D to the end Cb of the coating area C by suction (arrow a) Suction into the discharge port Da. As a result, it is possible to improve the drainage at the discharge port Da and to form the end Cb sharply so that the end Cb of the coating area C is in a straight line along the longitudinal direction of the discharge port Da.
[0034]
Further, when the intermittent valve Va is opened in order to form the coating area C on the substrate W, the coating liquid M is transferred from the cylinder 4a to the die side liquid supply path 3a by the piston 5 which is pushed and moved by the suction / pressure feeding means SV. Is rapidly pumped (arrow b), and the pressure of the coating liquid M remaining in the die side liquid supply path 3a is rapidly increased to instantaneously apply the coating liquid at a predetermined flow rate from the discharge port Da of the die D. By discharging, the starting end Ct of the coating area C is sharply formed. At this time, the coating liquid M that is rapidly pumped (arrow b) from the inside of the cylinder 4a includes an excessive amount other than that the start end Ct of the coating area C is sharply formed. Accordingly, the intermittent coating apparatus 11 releases the high-pressure excess coating liquid that exceeds the set pressure of the relief valve 13 to the tank T outside the die-side liquid supply path 3a and does not reach the set pressure of the relief valve 13. By supplying the coating liquid M to the die side liquid supply path 3a, the thickness of the coating film on the start end Ct side in the coating area C can be adjusted.
[0035]
(Second Embodiment)
2 to 4 show the coating apparatus of the present invention according to the second embodiment. FIG. 2 is a schematic view of the whole, and FIG. 3 is a three-way valve comprising a first on-off valve and a second on-off valve. FIG. 4 is a timing chart showing the operation timing of each valve and suction / pressure feeding means.
[0036]
The intermittent coating apparatus 21 according to the present embodiment is similar to the intermittent coating apparatus 11 (see FIG. 1) in that the die D for applying the coating liquid M to the substrate W and the coating liquid on the die D are used. A pressure feeding means 2 for feeding M, an intermittent valve Va which is provided between the die D and the pressure feeding means 2 and alternately opens and closes; and a die side liquid supply path 3a between the discharge port Da of the die D and the intermittent valve Va. It has a joined suction / pressure feeding means SV, and the structure of the die D, the structure of the pressure feeding means 2, the structure of the suction / pressure feeding means SV and the contents of the die side liquid supply path 3a are substantially the same as those of the intermittent coating apparatus 11. Are identical.
[0037]
The intermittent coating apparatus 21 according to the present embodiment is different from the intermittent coating apparatus 11 in that the die side liquid supply path 3a and the inside 4a of the suction / pressure feeding means SV are piped via the first on-off valve V1. And the inside of the cylinder 4a and the outside of the die-side liquid supply path 3a (in this embodiment, the tank T) are communicated with each other through the second on-off valve V2 through the escape path 24, and the contents of the command of the control device 25 It is.
[0038]
The control device 25 issues commands to the intermittent valve Va, the opening / closing valve Vb of the pressure feeding means 2, the operating tool 6 of the suction / pressure feeding means SV, the first opening / closing valve V1 and the second opening / closing valve V2, as shown in FIG. Is. That is, in the coating zone that forms the coating area C on the substrate W, the intermittent valve Va is commanded to be kept open, and the open / close valve Vb is commanded to be kept closed. In the idle zone in which the non-coating area G is formed on the substrate W, the intermittent valve Va is instructed to be kept closed, and the on-off valve Vb is instructed to be kept open. During the rest period in which coating is not performed, that is, when the piston 5 of the suction / pressure feeding means SV is moving (time zone P in the figure), and when the piston 5 is being pulled out (time period R in the figure). ) Instructs the first on-off valve V1 to maintain the open state and the second on-off valve V2 to maintain the closed state. While the piston 5 of the suction / pressure feeding means SV is being pushed and moved in the coating zone for coating (in the middle of the time zone J in the figure), the first on-off valve V1 is closed and the second on-off valve V2 is closed. Command each open. When the piston of the suction / pressure feeding means is fully pushed in the coating zone (time zone K in the figure), the first on-off valve V1 is instructed to maintain the closed state, and the second on-off valve V2 is instructed to maintain the open state. To do.
[0039]
Since the first on-off valve V1 and the second on-off valve V2 are in the open / closed state, the first on-off valve V1 and the second on-off valve V2 can be replaced with a single three-way valve Vc shown in FIG.
[0040]
In the coating method using the intermittent coating device 21, the intermittent valve Va is closed to stop the pumping of the coating liquid to the die side liquid supply path 3a to form the non-coating area G, and the intermittent valve Va is A coating area C is formed by coating the coating liquid, which is opened and pumped to the die side liquid supply path 3a, with the die D. When the intermittent valve Va is closed in order to form the non-coating area G on the substrate W, the coating liquid M in the die side liquid supply path 3a is moved to the inside 4a of the cylinder by the piston 5 which is pulled and moved by the suction / pressure feeding means SV. The coating liquid M (the part surrounded by the broken line E in FIG. 16C) drawn from the discharge port Da of the die D to the end Cb of the coating area C by suction (arrow a) Suction into the discharge port Da. As a result, it is possible to improve the drainage at the discharge port Da and to form the end Cb sharply so that the end Cb of the coating area C is in a straight line along the longitudinal direction of the discharge port Da.
[0041]
Further, when the intermittent valve Va is opened to form the coating area C on the substrate W, the coating liquid is transferred from the cylinder 4a to the die side liquid supply path 3a while pushing and moving the piston 5 of the suction / pressure feeding means SV. The first on-off valve V1 is opened and the second on-off valve V2 until M is being pumped (in the middle of the time zone J in FIG. 4 until the time T1 is reached after the switching of the intermittent valve Va). Is closed, the coating liquid M is supplied to the die-side liquid supply passage 3a, and when this is reached, the first on-off valve V1 is closed and the second on-off valve V2 is opened. The excess coating liquid M fed by pressure is released to the tank T outside the die side liquid supply path 3a through the escape path 24, and the thickness of the coating film on the start end Ct side in the coating area C can be adjusted. The time T1 for switching between opening and closing of the first on-off valve V1 and the second on-off valve V2 is appropriately set according to various coating conditions.
[0042]
(Third embodiment)
5 to 7 show the coating apparatus of the present invention according to the third embodiment. FIG. 5 is a schematic view of the whole, and FIG. 6 is a three-way valve composed of a first on-off valve and a second on-off valve. FIG. 7 is a timing chart showing the operation timing of each valve and suction / pressure feeding means.
[0043]
The intermittent coating apparatus 31 according to the present embodiment is similar to the intermittent coating apparatus 11 (see FIG. 1) in the die D for coating the substrate W with the coating liquid M and the coating liquid on the die D. A pressure feeding means 2 for feeding M, an intermittent valve Va which is provided between the die D and the pressure feeding means 2 and alternately opens and closes; and a die side liquid supply path 3a between the discharge port Da of the die D and the intermittent valve Va. It has a joined suction / pressure feeding means SV, and the structure of the die D, the structure of the pressure feeding means 2, the structure of the suction / pressure feeding means SV and the contents of the die side liquid supply path 3a are substantially the same as those of the intermittent coating apparatus 11. Are identical.
[0044]
  The intermittent coating apparatus 31 according to the present embodiment is different from the intermittent coating apparatus 11 in that the die side liquid supply path 3a and the inside 4a of the suction / pressure feeding means SV are communicated via the first on-off valve V1. , One end of the second on-off valve V2 communicates with the cylinder 4a of the suction / pressure feeding means SV, the other end of the second on-off valve V2 communicates with the die side liquid supply path 3a via the first flow rate adjustment valve F1, The other end of the second on-off valve V2 and the outside of the die-side liquid supply path 3a (in this embodiment, the tank T) are communicated with each other by the escape path 34 via the second flow rate adjusting valve F2, and a command from the control device 35 is provided. It is the contents of. As the first flow rate adjustment valve F1 and the second flow rate adjustment valve F2, for example, a needle valve is used, and the flow rate can be adjusted by moving the needle forward and backward.When the intermittent coating device 31 is coating by opening the intermittent valve Va, the coating liquid flows backward through the first flow rate adjustment valve F1 and the second flow rate adjustment valve F2 to the outside of the die side liquid supply path. In order not to escape, the third on-off valve V3 is provided in the middle of the liquid path connecting the other end of the second on-off valve V2 and the die side liquid supply path 3a via the first flow rate adjusting valve F1.
[0045]
  The control device 35 includes an intermittent valve Va, an on-off valve Vb of the pressure feeding means 2, an operation tool 6 of the suction / pressure feeding means SV, a first on-off valve V1, a second on-off valve V2, andThirdA command for the on-off valve V3 is issued as shown in FIG. That is, in the coating zone that forms the coating area C on the substrate W, the intermittent valve Va is commanded to be kept open, and the open / close valve Vb is commanded to be kept closed. In the idle zone in which the non-coating area G is formed on the substrate W, the intermittent valve Va is instructed to be kept closed, and the on-off valve Vb is instructed to be kept open. When the piston of the suction / pumping means is pulling and moving in the idle zone where coating is not performed (time zone P in the figure), the first on-off valve V1 is kept open and the second on-off valve V2 is closed. Maintaining state,ThirdOn-off valve V3CloseCommands to maintain state respectively. When the piston 5 of the suction / pressure feeding means SV is pulled in the resting zone (time zone R in the figure), the first on-off valve V1 is closed, the second on-off valve V2 is opened,ThirdThe opening / closing valve V3 is commanded to open. When the piston 5 of the suction / pressure feeding means SV is pushed and moved in the coating zone for coating (time zone J in the figure), the first on-off valve V1 is maintained in the closed state, and the second on-off valve V2 is maintained. To keep it open,ThirdThe open / close valve V3 is commanded to maintain the open state. When the piston 5 of the suction / pressure feeding means SV is fully pushed in the coating zone (time zone K in the figure),After instructing the third on-off valve 3 to close,Opened to the first on-off valve V1, closed to the second on-off valve V2.TheCommand each one.
[0046]
Since the first on-off valve V1 and the second on-off valve V2 are in the open / closed state, it can be replaced with a single three-way valve Vc shown in FIG.
[0047]
In the coating method using the intermittent coating device 31, the intermittent valve Va is closed to stop the pumping of the coating liquid to the die side liquid supply path 3a to form the non-coating area G, and the intermittent valve Va is A coating area C is formed by coating the coating liquid, which is opened and pumped to the die side liquid supply path 3a, with the die D. When the intermittent valve Va is closed in order to form the non-coating area G on the substrate W, the coating liquid M in the die side liquid supply path 3a is moved to the inside 4a of the cylinder by the piston 5 which is pulled and moved by the suction / pressure feeding means SV. The coating liquid M (the part surrounded by the broken line E in FIG. 16C) drawn from the discharge port Da of the die D to the end Cb of the coating area C by suction (arrow a) Suction into the discharge port Da. As a result, the drainage at the discharge port Da is improved, and the end Cb is sharply formed so that the end Cb of the coating area C is in a straight line along the longitudinal direction of the discharge port Da.
[0048]
  Further, in order to form the coating area C on the substrate W, the intermittent valve Va is set.Open,When the coating liquid M is being pumped from the cylinder 4a while pushing and moving the piston 5 of the suction / pressure feeding means SV, a part of the pumping coating liquid is fed to the first flow rate adjusting valve F1.And the third open / close valve V3 in the open stateIs supplied to the die-side liquid supply path 3a via the second side, and the remaining excess coating liquid is released to the tank T outside the die-side liquid supply path 3a via the second flow rate adjusting valve F2 of the path 34. Thus, the thickness of the coating film on the start end Ct side in the coating area C can be adjusted. The ratio between the amount of the coating liquid supplied to the die side liquid supply path 3a and the amount of the excess coating liquid released to the outside of the die side liquid supply path is determined by the first flow rate adjustment valve F1 and the second flow rate adjustment valve F2. It can be adjusted by changing each flow rate.
[0049]
(Fourth embodiment)
8 and 9 show the coating apparatus of the present invention according to the fourth embodiment. FIG. 8 is a schematic diagram of the whole, and FIG. 9 is a timing chart showing the operation timing of each valve and suction / pressure feeding means. It is.
[0050]
The intermittent coating apparatus 41 according to the present embodiment is similar to the intermittent coating apparatus 11 (see FIG. 1) in that the die D for coating the substrate W with the coating liquid M and the coating liquid on the die D are used. A pressure feeding means 2 for feeding M, an intermittent valve Va which is provided between the die D and the pressure feeding means 2 and alternately opens and closes; and a die side liquid supply path 3a between the discharge port Da of the die D and the intermittent valve Va. The first suction / pressure feeding means SV1 joined (corresponding to the suction / pressure feeding means SV of the intermittent coating apparatus 11) is provided, the structure of the die D, the structure of the pressure feeding means 2, and the structure of the first suction / pressure feeding means SV1. And the content of the die side liquid supply path 3a is substantially the same as that of the intermittent coating apparatus 11.
[0051]
The intermittent coating apparatus 41 according to the present embodiment is different from the intermittent coating apparatus 11 in that the first on-off valve V1 is provided in at least one of the die side liquid supply path 3a and the cylinder 4a of the first suction / pressure feeding means SV1. The second suction / pressure feeding means SV2 communicating with each other is provided, and a second opening / closing valve is provided between the cylinder inside 24a of the second suction / pressure feeding means SV2 and the outside of the die side liquid supply passage 3a (in the present embodiment, the tank T). This is the communication with the escape path 44 via V2 and the contents of the command of the control device 45.
[0052]
The second suction / pressure feeding means SV2 is a cylinder communicating with at least one of the die side liquid supply passage 3a and the cylinder 4a of the first suction / pressure feeding means SV1 (both in the illustrated case) via the first on-off valve V1. 24, a piston 25 inserted into the inner side 24a of the cylinder 24 so as to be freely pushed and pulled, and an operating tool 26 including a pneumatic cylinder or a solenoid for pushing and pulling the piston 25, and a suction amount into the cylinder 24a is first suctioned. -Less than the pressure feeding means SV1. The second suction / pressure feeding means SV2 sucks the excess coating liquid M pumped from the cylinder inside 4a of the first suction / pressure feeding means SV1 into the cylinder 24a as the piston 25 is pulled, and the piston 25 The coating liquid M discharged from the cylinder 24 a by the pushing movement is released to the outside of the die side liquid supply path 3 a via the second on-off valve V <b> 2 of the path 44. The second suction / pressure feeding means SV2 may change the stroke St that the piston 25 moves.
[0053]
The control device 45 includes an intermittent valve Va, an opening / closing valve Vb of the pressure feeding means 2, an operation tool 6 of the first suction / pressure feeding means SV1, an operation tool 26 of the second suction / pressure feeding means SV2, the first opening / closing valve V1 and the second. A command for the on-off valve V2 is issued as shown in FIG. That is, in the coating zone that forms the coating area C on the substrate W, the intermittent valve Va is commanded to be kept open, and the on-off valve Vb is commanded to be kept closed. In the idle zone in which the non-coating area G is formed on the substrate W, the intermittent valve Va is instructed to be kept closed, and the on-off valve Vb is instructed to be kept open. When the piston 5 of the first suction / pressure feeding means SV1 is moving in the idle zone where coating is not performed (time zone P in the figure), the first open / close valve V1 is maintained in the closed state, and the second open / close state is maintained. The valve V2 is instructed to maintain the closed state, and the second suction / pressure feeding means SV2 is instructed to maintain the push-off state of the piston 25. When the piston 5 of the first suction / pressure feeding means SV1 is disengaged in the resting zone (time zone R in the figure), the first on-off valve V1 is kept open and the second on-off valve V2 is kept closed. The second suction / pressure feeding means SV2 is each instructed to maintain the push-off state of the piston 25. When the piston 5 of the first suction / pressure feeding means SV1 is pushed and moved in the coating zone for coating (time zone J in the figure), the first open / close valve V1 is maintained in the open state, and the second open / close state is maintained. The valve V2 is instructed to maintain the closed state, and the second suction / pressure feeding means SV2 is instructed to pull the piston 25. While the piston 5 of the first suction / pressure feeding means SV1 is fully pushed in the coating zone (in the middle of the time zone K in the figure), the first on-off valve V1 is closed, the second on-off valve V2 is opened, 2 Commands the suction / pressure feeding means SV2 to cut the piston 25. Thereafter, when the piston 5 of the first suction / pressure feeding means SV1 is fully pushed, the first opening / closing valve V1 is kept closed, the second opening / closing valve V2 is closed, and the second suction / pressure feeding means SV2 is closed with the piston 25. Commands to maintain the push-off state.
[0054]
The coating method using the intermittent coating apparatus 41 forms the non-coating area G by closing the intermittent valve Va shown in FIG. 8 and stopping the pumping of the coating liquid to the die-side liquid supply path 3a. A coating area C is formed by opening the intermittent valve Va and applying the coating liquid pressure-fed to the die-side liquid supply path 3a with the die D. When the intermittent valve Va is closed in order to form the non-coating area G on the substrate W, the coating liquid M in the die side liquid supply path 3a is moved into the cylinder by the piston 5 which is moved by the first suction / pressure feeding means SV1. The coating liquid M (part surrounded by a broken line E in FIG. 16 (c) in FIG. 16) is sucked (arrow a) to 4a and comes out from the discharge port Da of the die D to the end Cb of the coating area C. ) Is sucked into the discharge port Da. As a result, it is possible to improve the drainage at the discharge port Da and to form the end Cb sharply so that the end Cb of the coating area C is in a straight line along the longitudinal direction of the discharge port Da.
[0055]
When the intermittent valve Va is opened to form the coating area C on the substrate W, the first on-off valve V1 is opened and the second on-off valve V2 is closed, so that the first suction / pressure feeding is performed. The piston 5 of the means SV1 is pushed and moved and the piston 25 of the second suction / pressure feeding means SV2 is pulled to move a part of the coating liquid M fed from the cylinder 4a of the first suction / pressure feeding means SV1. While supplying to the die side liquid supply path 3a and sucking the remaining excess coating liquid M into the cylinder 24a of the second suction / pressure feeding means SV2, the coating film on the start end Ct side in the coating area C The thickness can be adjusted. The ratio between the amount of the coating liquid supplied to the die side liquid supply path 3a and the amount of the coating liquid sucked into the cylinder 24a of the second suction / pressure feeding means SV2 without being supplied to the die side liquid supply path 3a is: It can be adjusted by changing the suction amount of the cylinder 4 of the first suction / pressure feeding means SV1 and the suction amount of the cylinder 24 of the second suction / pressure feeding means SV2. The suction amount of each cylinder 4 and 24 may be changed by changing the stroke St of each piston 5 (or 25).
[0056]
After the piston 5 of the first suction / pressure feeding means SV1 is fully pushed and the piston 25 of the second suction / pressure feeding means SV2 is pulled off, the first opening / closing valve V1 is closed and the second opening / closing valve V2 is opened. Then, the piston 25 of the second suction / pressure feeding means SV2 is pushed and moved to release the excess coating liquid M in the cylinder 24a to the tank T outside the die side liquid supply path 3a through the escape path 44, 2 The suction / pumping means SV2 is put on standby until the next suction operation.
[0057]
(Fifth embodiment)
FIG. 10 is an overall schematic view of the coating apparatus of the present invention according to a fifth embodiment.
[0058]
The intermittent coating apparatus 51 according to the present embodiment is similar to the intermittent coating apparatus 11 (see FIG. 1) in the die D for coating the substrate W with the coating liquid M and the coating liquid on the die D. A pressure feeding means 2 for pressure-feeding M and an intermittent valve Va provided between the die D and the pressure feeding means 2 to alternately open and close are provided. The structure of the die D, the structure of the pressure feeding means 2, and the discharge port Da of the die D The contents of the die side liquid supply path 3a between the intermittent valve Va and the intermittent coating device 11 are substantially the same.
[0059]
The intermittent coating apparatus 51 according to the present embodiment is different from the intermittent coating apparatus 11 in that suction / pressure feeding means SV joined to the die-side liquid supply path 3a between the discharge port Da of the die D and the intermittent valve Va. The structure of the above, the junction structure of the die side liquid supply path 3a and the suction / pressure feeding means SV, and the contents of the escape path 54 communicating the suction / pressure feeding means SV and the outside of the die side liquid supply path 3a.
[0060]
The suction / pressure feeding means SV includes a cylinder 4 formed of a separate main cylinder 4A and a sub cylinder 4B, and a piston 5 inserted into the main cylinder 4A and a sub piston 5B inserted into the sub cylinder 4B. The operation tool 6 is operated in conjunction with the push and pull of both pistons 5A and 5B. The suction / pressure feeding means SV communicates the die side liquid supply path 3a and the main cylinder 4Aa, and prevents the die side liquid supply path 3a and the sub cylinder 4Ba from flowing backward to the die side liquid supply path 3a. The first check valve 52 communicates.
[0061]
The escape passage 54 communicates the sub cylinder 4Ba of the suction / pressure feeding means SV with the outside of the die side liquid supply passage 3a (the tank T in the present embodiment), and the second check valve 53 is provided in the middle thereof. Is provided so as to prevent the backflow toward the sub-cylinder 4Ba.
[0062]
In the coating method using the intermittent coating device 51, the intermittent valve Va is closed to stop the pumping of the coating liquid to the die side liquid supply path 3a to form the non-coating area G, and the intermittent valve Va is A coating area C is formed by coating the coating liquid, which is opened and pumped to the die side liquid supply path 3a, with the die D. When closing the intermittent valve Va in order to form the non-coating area G on the substrate W, the main piston 5A and the sub-piston 5B that draw and move the coating liquid M in the die side liquid supply path 3a by the suction / pressure feeding means SV. Then, the coating liquid M is drawn from the discharge port Da of the die D to the end Cb of the coating area C (see FIG. 16C). The portion surrounded by a broken line E) is sucked into the discharge port Da. As a result, it is possible to improve the drainage at the discharge port Da and to form the end Cb sharply so that the end Cb of the coating area C is in a straight line along the longitudinal direction of the discharge port Da.
[0063]
Further, when the intermittent valve Va is opened in order to form the coating area C on the substrate W, the main piston 5A and the sub piston 5B of the suction / pressure feeding means SV are pushed and moved to be pressure-fed from the main cylinder 4Aa. Is supplied to the die side liquid supply path 3a (arrow b), and excess coating liquid M pumped from the sub cylinder 4Ba is released to the tank T through the escape path 54 (arrows). Symbol c), the thickness of the coating film on the start end Ct side in the coating area C can be adjusted. The ratio between the amount of coating liquid supplied to the die side liquid supply path 3a and the amount of coating liquid released to the tank T can be adjusted by changing the suction amount of the main cylinder 4A and the suction amount of the sub cylinder 4B. The suction amount of the main cylinder 4A and the sub cylinder 4B can be changed by changing the strokes of the pistons 5A and 5B.
[0064]
(Sixth embodiment)
FIGS. 11 to 13 show the coating apparatus of the present invention according to a sixth embodiment. FIG. 11 is an overall schematic view, and FIG. 12 is a three-way valve comprising a first on-off valve and a second on-off valve. FIG. 13 is a timing chart showing the operation timing of each valve and suction / pressure feeding means.
[0065]
The intermittent coating apparatus 61 according to the present embodiment is similar to the intermittent coating apparatus 11 (see FIG. 1) in the die D for coating the substrate W with the coating liquid M and the coating liquid on the die D. A pressure feeding means 2 for pressure-feeding M and an intermittent valve Va provided between the die D and the pressure feeding means 2 to alternately open and close are provided. The structure of the die D, the structure of the pressure feeding means 2, and the discharge port Da of the die D The contents of the die side liquid supply path 3a between the intermittent valve Va and the intermittent coating device 11 are substantially the same.
[0066]
The intermittent coating apparatus 61 according to the present embodiment is different from the intermittent coating apparatus 11 in that suction / pressure feeding means SV joined to the die side liquid supply path 3a between the discharge port Da of the die D and the intermittent valve Va. The structure of the above, the joining structure of the die side liquid supply path 3a and the suction / pressure feeding means SV, the structure of the escape path 64 communicating with the outside of the suction / pressure feeding means SV and the die side liquid supply path 3a, and the command of the control device 65 It is the contents of.
[0067]
The suction / pressure feeding means SV includes a cylinder 4 formed of a separate main cylinder 4A and a sub cylinder 4B, and a piston 5 inserted into the main cylinder 4A and a sub piston 5B inserted into the sub cylinder 4B. The operation tool 6 is operated in conjunction with the push and pull of both pistons 5A and 5B. The suction / pressure feeding means SV communicates the die side liquid supply path 3a and the main cylinder 4Aa via the first on-off valve V1, and communicates the main cylinder 4Aa and the sub cylinder 4Ba via the second on-off valve V2. In addition, the sub cylinder 4Ba communicates with the outside of the die side liquid supply path 3a (in this embodiment, the tank T) through the third opening / closing valve V3 through the escape path 64.
[0068]
The control device 65 provides commands to the intermittent valve Va, the on-off valve Vb of the pressure feeding means 2, the operating tool 6 of the suction / pressure feeding means SV, the first on-off valve V1, the second on-off valve V2, and the third on-off valve V3. It is emitted as shown in FIG. That is, in the coating zone that forms the coating area C on the substrate W, the intermittent valve Va is commanded to be kept open, and the open / close valve Vb is commanded to be kept closed. In the idle zone in which the non-coating area G is formed on the substrate W, the intermittent valve Va is instructed to be kept closed, and the on-off valve Vb is instructed to be kept open. When the pistons 5A and 5B of the suction / pressure feeding means SV are moving in the idle zone where coating is not performed (time zone P in the figure), the first on-off valve V1 is maintained in the open state. The open / close valve V2 is instructed to maintain the open state, and the third open / close valve V3 is instructed to maintain the closed state. When both pistons 5A and 5B of the suction / pressure feeding means SV are pulled out in the resting zone (time zone R in the figure), the first on-off valve V1 is kept open and the second on-off valve V2 is closed. The third on-off valve V3 is commanded to open. When both pistons 5A and 5B of the suction / pressure feeding means are pushed and moved in the coating zone for coating (time zone J in the figure), the first open / close valve V1 is maintained in the open state, and the second open / close state is maintained. The valve V2 is instructed to maintain the closed state, and the third on-off valve V3 is instructed to maintain the open state. In the middle of the time when both pistons 5A, 5B of the suction / pressure feeding means SV are fully pushed in the coating zone (time zone K in the figure), the first on-off valve V1 is closed and the second on-off valve V2 is closed. Maintenance is commanded to the third on-off valve V3 to maintain the open state. Thereafter, when both pistons 5A, 5B of the suction / pressure feeding means SV are pushed down, the first on-off valve is opened, the second on-off valve is opened, and the third on-off valve is closed.
[0069]
Since the second on-off valve V2 and the third on-off valve V3 are in the open / closed state, it can be replaced with a single three-way valve Vc shown in FIG.
[0070]
In the coating method using the intermittent coating device 61, the intermittent valve Va shown in FIG. 11 is closed to stop the pumping of the coating liquid to the die side liquid supply path 3a to form the non-coating area G. A coating area C is formed by opening the intermittent valve Va and applying the coating liquid pressure-fed to the die-side liquid supply path 3a with the die D. When closing the intermittent valve Va in order to form the non-coating area G on the substrate W, the first on-off valve V1 and the second on-off valve V2 are opened and the third on-off valve V3 is closed, and the die side The coating liquid M in the liquid supply passage 3a is sucked into the cylinders 4Aa and 4Ba (arrows a) by both pistons 5A and 5B which are pulled and moved by the suction / pressure feeding means SV, and is applied from the discharge port Da of the die D. The coating liquid M (a portion surrounded by a broken line E in FIG. 16C) that reaches the end Cb of the zone C is sucked into the discharge port Da. As a result, it is possible to improve the drainage at the discharge port Da and to form the end Cb sharply so that the end Cb of the coating area C is in a straight line along the longitudinal direction of the discharge port Da. When both pistons 5A and 5B of the suction / pressure feeding means SV are pulled, the second on-off valve V2 is closed and the third on-off valve V3 is opened.
[0071]
When the intermittent valve Va is opened to form the coating area C on the substrate W, the first on-off valve V1 and the third on-off valve V3 are opened and the second on-off valve V2 is closed. Then, both pistons 5A and 5B of the suction / pressure feeding means SV are pushed and moved to supply the coating liquid M pumped from the main cylinder 4Aa of the suction / pressure feeding means SV to the die side liquid supply path 3a (arrow a). At the same time, the excess coating liquid M fed from the sub cylinder 4Ba is released to the tank T outside the die side liquid supply path 3a through the escape path 64 (arrow c), and the starting end Ct in the coating area C is obtained. The thickness of the coating film on the side can be adjusted. The ratio between the amount of coating liquid supplied to the die side liquid supply path 3a and the amount of coating liquid released to the tank T can be adjusted by changing the suction amount of the main cylinder 4A and the suction amount of the sub cylinder 4B. The suction amount of the main cylinder 4A and the sub cylinder 4B can be changed by changing the stroke St of each piston 5A, 5B.
[0072]
When both pistons 5A and 5B are pushed down in the coating zone, the second on-off valve V2 is opened and the third on-off valve V3 is closed to prepare for the formation of the next non-coating area G.
[0073]
(Seventh embodiment)
14 and 15 show the coating apparatus of the present invention according to the seventh embodiment. FIG. 14 is a schematic diagram of the whole, and FIG. 15 is a timing chart showing the operation timing of each valve and suction / pressure feeding means. It is.
[0074]
The intermittent coating apparatus 71 according to the present embodiment is similar to the intermittent coating apparatus 11 (see FIG. 1) in the die D for coating the substrate W with the coating liquid M and the coating liquid on the die D. A pressure feeding means 2 for pressure-feeding M and an intermittent valve Va provided between the die D and the pressure feeding means 2 to alternately open and close are provided. The structure of the die D, the structure of the pressure feeding means 2, and the discharge port Da of the die D The contents of the die side liquid supply path 3a between the intermittent valve Va and the intermittent coating device 11 are substantially the same.
[0075]
The intermittent coating apparatus 71 according to the present embodiment is different from the intermittent coating apparatus 11 (FIG. 1) in that the suction bonded to the die-side liquid supply path 3a between the discharge port Da of the die D and the intermittent valve Va. The structure of the pressure feeding means SV, the joining structure of the die side liquid supply path 3a and the suction / pressure feeding means SV, the structure of the escape path 74 communicating with the outside of the suction / pressure feeding means SV and the die side liquid supply path 3a, and control This is the content of the command of the device 75.
[0076]
The suction / pressure feeding means SV includes a main piston 4A having a cylinder composed of an individual main cylinder 4A and a plurality of n (two or more) sub cylinders 4B-1 to 4B-n, and pistons inserted into the main cylinder 4A. It consists of sub pistons 5B-1 to 5B-n inserted into the sub cylinders 4B-1 to 4B-n. The piston 5A, 5B-1 to 5B-n are interlocked with each other, and the die side liquid supply path 3a 4Aa and the main cylinder 4Aa through the first on-off valve V1, and the main cylinder 4Aa and the sub-cylinders 4B-1a to 4B-na are individually connected through the second on-off valve V2. The inner 4B-1a to 4B-na and the outside of the die-side liquid supply path 3a are individually communicated with each other via a third on-off valve V3. Since the first on-off valve V1 and the second on-off valve V2 of each set corresponding to each of the sub cylinders 4B-1 to 4B-n are reversed, the three-way valves Vc-1 to Vc-n are replaced. However, it can also be provided individually.
[0077]
The control device 75 provides commands to the intermittent valve Va, the on-off valve Vb of the pressure feeding means 2, the operating tool 6 of the suction / pressure feeding means SV, the first on-off valve V1, the second on-off valve V2 and the third on-off valve V3 of each set. Is generated as shown in FIG. That is, the control device 75 performs the second opening / closing of the three-way valves Vc-1 to Vc-m communicating with an arbitrary number (m) of sub-cylinders 4B-1a to 4B-ma in the idle zone where coating is not performed. The valve V2 is maintained in the open state, and the third on-off valve V3 of the three-way valves Vc-1 to Vc-m communicating with the arbitrary number (m) of sub cylinders 4B-1a to 4B-ma is maintained in the closed state. When all the pistons 5A, 5B-1 to 5B-n of the suction / pressure feeding means SV are moving (time zone P in the figure), the first on-off valve V1 is kept open. Is maintained open in the second open / close valves V2 of the remaining three-way valves Vc- (m + 1) to Vc-n, and closed to the third open / close valves V3 of the remaining three-way valves Vc- (m + 1) to Vc-n. Commands to maintain state respectively. When all the pistons 5A, 5B-1 to 5B-n of the suction / pressure feeding means SV are in the resting zone (time zone R in the figure), the first on-off valve V1 is kept open. The remaining three-way valves Vc- (m + 1) to Vc-n are each instructed to be closed, and the remaining three-way valves Vc- (m + 1) to Vc-n are instructed to be opened. When all the pistons 5A, 5B-1 to 5B-n of the suction / pressure feeding means SV are pushed and moved in the coating zone for coating (time zone J in the figure), the first on-off valve V1 is opened. Maintaining the state of the remaining three-way valves Vc- (m + 1) to Vc-n, maintaining the closed state, and maintaining the remaining three-way valves Vc- (m + 1) to Vc-n. Command V3 to maintain the open state. In the middle of the time when all the pistons 5A, 5B-1 to 5B-n of the suction / pressure feeding means SV are fully pushed in the coating zone (time zone K in the figure), the first on-off valve V1 is closed and the remaining Maintain the closed state for each of the second on-off valves V2 of the three-way valves Vc- (m + 1) to Vc-n, and maintain the open state of the third on-off valves V3 of the remaining three-way valves Vc- (m + 1) to Vc-n. Command each one. After that, when all the piston pistons 5A, 5B-1 to 5B-n of the suction / pressure feeding means SV are pushed down, the first on-off valve V1 is opened and the remaining three-way valves Vc- (m + 1) to Vc-n The second on-off valves V2 are instructed to open, and the remaining three-way valves Vc- (m + 1) to Vc-n are instructed to close. As described above, the total number of sub cylinders is n, and the arbitrary number is m. Although not in the present embodiment, when the number of sub cylinders is 1 (n = 1) and the arbitrary number is zero (m = 0), the intermittent coating apparatus 61 (FIGS. 11 to 13). And substantially the same.
[0078]
In the coating method using the intermittent coating device 71, the intermittent valve Va shown in FIG. 14 is closed to stop the pumping of the coating liquid to the die side liquid supply path 3a to form the non-coating area G. A coating area C is formed by opening the intermittent valve Va and applying the coating liquid pressure-fed to the die-side liquid supply path 3a with the die D. When the intermittent valve Va is closed in order to form the non-coating area G on the substrate W, the first on-off valve V1 and all the second on-off valves V2 are opened and all the third on-off valves V3 are closed. Then, all the pistons 5A, 5B-1 to 5B-n of the suction / pressure feeding means SV are pulled and moved, and the coating liquid is supplied from the die side liquid supply passage 3a to all the cylinders 4Aa, 4B-1a to 4B-na. M is sucked, and the coating liquid M (a portion surrounded by a broken line E in FIG. 16C) of the coating area C is discharged from the discharge port Da of the die D to the discharge port Da. Aspirate inside. As a result, it is possible to improve the drainage at the discharge port Da and to form the end Cb sharply so that the end Cb of the coating area C is in a straight line along the longitudinal direction of the discharge port Da. When all the pistons 5A, 5B-1 to 5B-n of the suction / pressure feeding means SV are pulled off, the second on-off valves V2 of the respective groups of the three-way valves Vc- (m + 1) to Vc-n are closed and the third Open the on-off valve V3.
[0079]
When the intermittent valve Va is opened to form the coating area C on the substrate W, the first on-off valve V1 and the third on-off valves V3 of the three-way valves Vc- (m + 1) to Vc-n are set. Is opened, and the second on-off valves V2 of the respective groups of the three-way valves Vc- (m + 1) to Vc-n are closed, and all the pistons of the suction / pressure feeding means SV are pushed and moved, thereby Supply the coating liquid M pumped from the main cylinder 4Aa of the pumping means SV and the cylinders 4B-1a to 4B-ma of the three-way valves Vc-1 to Vc-m to the die side liquid supply path 3a (arrows) b), and the excess coating liquid M pumped from the cylinders 4B- (m + 1) a to 4B-na in the cylinders of the three-way valves Vc- (m + 1) to Vc-n Relief to the tank T outside the path 3a (arrow c), to the coating area C You can adjust the thickness of the starting Ct side of the coating film that. The ratio between the amount of the coating liquid supplied to the die side liquid supply path 3a and the amount of the coating liquid released to the tank T can be adjusted by changing the arbitrary number m. This change can be performed by the control device 75.
[0080]
When all the pistons are pushed down in the coating zone, the second on-off valve V2 of each set of the three-way valves Vc- (m + 1) to Vc-n is opened and the third on-off valve V3 is closed, and the next non-coating is performed. Prepare for formation of zone G.
[0081]
【The invention's effect】
When the coating apparatus of the present invention according to claim 1 starts the coating of the coating area, it supplies a part of the coating liquid pumped from the inside of the cylinder of the suction / pumping means to the die side liquid supply path. The thickness of the coating film on the start end side in the coating area can be adjusted by letting the remainder of the coating liquid escape to the outside of the die side liquid supply path.
[0082]
The coating apparatus of the present invention according to claim 2, when the coating of the coating area is started, the amount of the coating liquid supplied from the cylinder of the suction / pressure feeding means to the die side liquid supply path and the die side liquid supply path The thickness of the coating film on the start end side in the coating area can be adjusted by changing the setting pressure of the relief valve with respect to the ratio of the coating liquid that escapes to the outside.
[0083]
The coating apparatus of the present invention according to claim 3 is the amount of coating liquid supplied from the cylinder of the suction / pressure feeding means to the die side liquid supply path and the die side liquid supply path when starting the coating of the coating area. By changing the timing of opening the first on-off valve and closing the second on-off valve in the middle of pushing and moving the piston of the suction / pumping means, the ratio of the coating liquid to escape outside The thickness of the coating film on the start end side in the region can be adjusted.
[0084]
The coating apparatus of the present invention according to claim 4 is the amount of coating liquid supplied from the inside of the cylinder of the suction / pressure feeding means to the die side liquid supply path and the die side liquid supply path when starting the coating of the coating area. The thickness of the coating film on the start end side in the coating area can be adjusted by changing the flow rate of the first flow rate adjustment valve and the second flow rate adjustment valve with respect to the ratio of the coating liquid that escapes to the outside.
[0085]
When the coating device of the present invention according to claim 5 starts the coating of the coating area, a part of the coating liquid which is pumped from the cylinder of the first suction / pressure feeding means and goes to the die side liquid supply path By sucking into the suction cylinder of the second suction / pumping means, the thickness of the coating film on the start end side in the coating region can be reliably adjusted.
[0086]
The coating apparatus of the present invention according to claim 6 has a simple structure using two check valves, and when both pistons of the suction / pressure feeding means are pushed and moved, the coating liquid in the main cylinder is transferred to the die side. The thickness of the coating film on the start side in the coating area can be adjusted by supplying the coating liquid in the sub-cylinder to the outside of the die side liquid supply path while supplying the liquid to the liquid supply path.
[0087]
According to the seventh aspect of the present invention, when both pistons of the suction / pressure feeding means are pushed and moved, a predetermined amount of coating liquid is supplied from the main cylinder to the die side liquid supply passage and from the sub cylinder. By letting a predetermined amount of coating liquid escape to the outside of the die side liquid supply path, the thickness of the coating film on the start end side in the coating area can be adjusted to be constant.
[0088]
In the coating apparatus of the present invention according to claim 8, when the piston is pushed and moved, the number of sub cylinders for supplying the coating liquid to the die side liquid supply path and the coating liquid on the outside of the die side liquid supply path. By changing the number of sub-cylinders to escape, the thickness of the coating film on the start end side in the coating area can be easily adjusted.
[Brief description of the drawings]
FIG. 1 is an overall schematic view showing a first embodiment of a coating apparatus of the present invention.
FIG. 2 is an overall schematic view showing a second embodiment of the coating apparatus of the present invention.
FIG. 3 is an overall schematic diagram when the first on-off valve and the second on-off valve are configured by three-way valves in the second embodiment.
FIG. 4 is a timing chart showing the operation timing of each valve and suction / pressure feeding means in the second embodiment.
FIG. 5 is an overall schematic view showing a third embodiment of the coating apparatus of the present invention.
FIG. 6 is an overall schematic view when the first on-off valve and the second on-off valve are constituted by three-way valves in the third embodiment.
FIG. 7 is a timing chart showing the operation timing of each valve and suction / pressure feeding means in the third embodiment.
FIG. 8 is an overall schematic view showing a fourth embodiment of the coating apparatus of the present invention.
FIG. 9 is a timing chart showing the operation timing of each valve and suction / pressure feeding means in the fourth embodiment.
FIG. 10 is an overall schematic view showing a fifth embodiment of the coating apparatus of the present invention.
FIG. 11 is an overall schematic view showing a sixth embodiment of the coating apparatus of the present invention.
FIG. 12 is an overall schematic diagram when the first on-off valve and the second on-off valve are configured by three-way valves in the sixth embodiment.
FIG. 13 is a timing chart showing the operation timing of each valve and suction / pressure feeding means in the sixth embodiment.
FIG. 14 is an overall schematic view showing a seventh embodiment of the coating apparatus of the present invention.
FIG. 15 is a timing chart showing the operation timing of each valve and suction / pressure feeding means in the seventh embodiment.
FIG. 16 shows a conventional intermittent coating apparatus, in which FIG. (A) is a schematic view of the whole, FIG. (B) is an enlarged view of part b in FIG. (A), and FIG. It is an enlarged view of c part in a).
[Explanation of symbols]
D ... Die, Va ... Intermittent valve, M ... Coating liquid, 2 ... Pressure feeding means, 3a ... Die side liquid supply path, 4a ... Inside cylinder, 5 ... Piston, SV ... Suction / pressure feeding means, 12 ... Release means, 13 ... Relief valve, 14 ... Relief path

Claims (8)

基材に塗工液を塗工するダイと、該ダイへ塗工液を圧送する圧送手段と、該ダイと該圧送手段の間に設けた断続バルブと、該ダイと該断続バルブの間のダイ側給液路に連通して塗工液を吸引又は圧送する吸引・圧送手段を備え、該断続バルブを閉じるときには該ダイ側給液路から該吸引・圧送手段へ塗工液を吸引し、該断続バルブを開くときには該吸引・圧送手段から該ダイ側給液路へ塗工液を圧送する間欠塗工装置において、前記吸引・圧送手段又は前記ダイ側給液路と前記ダイ側給液路の外側を、逃がし量を調整できる逃がし手段で連通し、前記吸引・圧送手段から圧送する塗工液の一部を逃がし手段で前記ダイ側給液路の外側へ逃がすことを特徴とする間欠塗工装置。A die for coating the substrate with the coating liquid, a pressure feeding means for pumping the coating liquid to the die, an intermittent valve provided between the die and the pressure feeding means, and between the die and the intermittent valve A suction / pressure feeding means that sucks or pumps the coating liquid in communication with the die side liquid supply path, and when closing the intermittent valve, sucks the coating liquid from the die side liquid supply path to the suction / pressure feeding means, In the intermittent coating apparatus for pumping the coating liquid from the suction / pressure feeding means to the die side liquid supply path when the intermittent valve is opened, the suction / pressure feeding means or the die side liquid supply path and the die side liquid supply path The intermittent coating is characterized in that a part of the coating liquid pumped from the suction / pressure feeding means is allowed to escape to the outside of the die side liquid supply path by the relief means capable of adjusting the escape amount. Engineering equipment. 基材に塗工液を塗工するダイと、該ダイへ塗工液を圧送する圧送手段と、該ダイと該圧送手段の間に設けた断続バルブと、該ダイと該断続バルブの間のダイ側給液路に連通するシリンダ内へピストンを押し引き自在に挿入した吸引・圧送手段を備え、該断続バルブを閉じるときには該吸引・圧送手段の引くピストンで該ダイ側給液路からシリンダ内へ塗工液を吸引し、該断続バルブを開くときには該吸引・圧送手段の押すピストンでシリンダ内から該ダイ側給液路へ塗工液を圧送する間欠塗工装置において、前記シリンダ内又は前記ダイ側給液路と前記ダイ側給液路の外側を、リリーフ弁を備えた逃がし路で連通し、前記吸引・圧送手段の押すピストンでシリンダ内から圧送され、該リリーフ弁の設定圧力を越える高圧の塗工液を、該逃がし路で前記ダイ側給液路の外側へ逃がすことを特徴とする間欠塗工装置。A die for coating the substrate with the coating liquid, a pressure feeding means for pumping the coating liquid to the die, an intermittent valve provided between the die and the pressure feeding means, and between the die and the intermittent valve A suction / pressure feeding means is provided in which a piston is pushed and pulled freely into a cylinder communicating with the die side liquid supply path, and when the intermittent valve is closed, the piston pulled by the suction / pressure feed means is used to pull the piston from the die side liquid supply path into the cylinder. In the intermittent coating apparatus for pumping the coating liquid from the cylinder to the die side liquid supply path with the piston pushed by the suction / pressure feeding means when the intermittent valve is opened, The die side liquid supply path and the outside of the die side liquid supply path are communicated with each other by a relief path provided with a relief valve, and are pumped from within the cylinder by a piston pushed by the suction / pressure feeding means, exceeding the set pressure of the relief valve. The high-pressure coating solution is released In intermittent coating apparatus characterized by escape to the outside of the die-side liquid supplying passage. 基材に塗工液を塗工するダイと、該ダイへ塗工液を圧送する圧送手段と、該ダイと該圧送手段の間に設けた断続バルブと、該ダイと該断続バルブの間のダイ側給液路に連通するシリンダ内へピストンを押し引き自在に挿入した吸引・圧送手段と、該吸引・圧送手段にピストンの押し引きを指令すると共に該断続バルブに開閉を指令する制御装置を備え、該断続バルブを閉じるときに該吸引・圧送手段の引くピストンで該ダイ側給液路からシリンダ内へ塗工液を吸引し、該断続バルブを開くときに該吸引・圧送手段の押すピストンでシリンダ内から該ダイ側給液路へ塗工液を圧送する間欠塗工装置において、前記ダイ側給液路と前記シリンダ内を第１開閉弁を介して連通し、前記シリンダ内と前記ダイ側給液路の外側を第２開閉弁を介して連通し、前記制御装置は、前記吸引・圧送手段のピストンが引き移動を開始してから引き切っているときには、該第１開閉弁に開状態の維持を、該第２開閉弁に閉状態の維持をそれぞれ指令し、前記吸引・圧送手段のピストンが押し移動している途中では、該第１開閉弁に閉を、該第２開閉弁に開をそれぞれ指令し、前記吸引・圧送手段のピストンが押し切っているときには、該第１開閉弁に閉状態の維持を、該第２開閉弁に開状態の維持をそれぞれ指令することを特徴とする間欠塗工装置。A die for coating the substrate with the coating liquid, a pressure feeding means for pumping the coating liquid to the die, an intermittent valve provided between the die and the pressure feeding means, and between the die and the intermittent valve A suction / pressure feeding means in which a piston is slidably inserted into a cylinder communicating with the die-side liquid supply path, and a control device for commanding the suction / pressure feeding means to push and pull the piston and to open / close the intermittent valve; A piston that is pulled by the suction / pressure feeding means when the intermittent valve is closed, and sucks the coating liquid from the die side liquid supply passage into the cylinder, and is pushed by the suction / pressure feeding means when the intermittent valve is opened. In the intermittent coating apparatus for pumping the coating liquid from the inside of the cylinder to the die side liquid supply path, the die side liquid supply path and the inside of the cylinder are communicated via a first on-off valve, and the cylinder and the die are connected. The outside of the side liquid supply passage through the second on-off valve The control device maintains the open state of the first on-off valve and maintains the closed state of the second on-off valve when the piston of the suction / pressure feeding means has been pulled out after starting the pulling movement. While the piston of the suction / pressure feeding means is being pushed and moved, the first on-off valve is instructed to be closed and the second on-off valve is instructed to be opened. In the intermittent coating apparatus, the first on-off valve is instructed to maintain the closed state, and the second on-off valve is instructed to maintain the open state. 基材に塗工液を塗工するダイと、該ダイへ塗工液を圧送する圧送手段と、該ダイと該圧送手段の間に設けた断続バルブと、該ダイと該断続バルブの間のダイ側給液路に連通するシリンダ内へピストンを押し引き自在に挿入した吸引・圧送手段と、該吸引・圧送手段にピストンの押し引きを指令すると共に該断続バルブに開閉を指令する制御装置を備え、該断続バルブを閉じるときに該吸引・圧送手段の引くピストンで該ダイ側給液路からシリンダ内へ塗工液を吸引し、該断続バルブを開くときに該吸引・圧送手段の押すピストンでシリンダ内から該ダイ側給液路へ塗工液を圧送する間欠塗工装置において、前記ダイ側給液路と前記シリンダ内を第１開閉弁を介して連通し、前記シリンダ内に第２開閉弁の一端を連通し、該第２開閉弁の他端と前記ダイ側給液路を第１流量調整弁及び第３開閉弁を介して連通し、該第２開閉弁の他端と前記ダイ側給液路の外側を第２流量調整弁を介して連通し、前記制御装置は、前記吸引・圧送手段のピストンが引き移動しているときには、該第１開閉弁に開状態の維持を、該第２開閉弁に閉状態の維持をそれぞれ指令し、前記吸引・圧送手段のピストンが引き切っているときには、該第１開閉弁に閉を、該第２開閉弁に開をそれぞれ指令し、前記吸引・圧送手段のピストンが押し移動しているときには、該第１開閉弁に閉状態の維持を、該第２開閉及び第３開閉弁に開状態の維持をそれぞれ指令し、前記吸引・圧送手段のピストンが押し切っているときには、該第３開閉弁に閉を指令した後に、該第１開閉弁に開を、該第２開閉弁に閉をそれぞれ指令することを特徴とする間欠塗工装置。A die for coating the substrate with the coating liquid, a pressure feeding means for pumping the coating liquid to the die, an intermittent valve provided between the die and the pressure feeding means, and between the die and the intermittent valve A suction / pressure feeding means in which a piston is slidably inserted into a cylinder communicating with the die-side liquid supply path, and a control device for commanding the suction / pressure feeding means to push and pull the piston and to open / close the intermittent valve; A piston that is pulled by the suction / pressure feeding means when the intermittent valve is closed, and sucks the coating liquid from the die side liquid supply passage into the cylinder, and is pushed by the suction / pressure feeding means when the intermittent valve is opened. In the intermittent coating apparatus for pressure-feeding the coating liquid from the cylinder to the die side liquid supply path, the die side liquid supply path and the inside of the cylinder communicate with each other via a first on-off valve, and the second in the cylinder. One end of the on-off valve communicates with the other end of the second on-off valve The serial die side liquid supplying passage communicates through a first flow regulating valve and a third on-off valve, communication outside the other end of the second on-off valve the die-side liquid supplying passage through the second flow regulating valve The control device commands the first on-off valve to maintain the open state and the second on-off valve to maintain the closed state when the piston of the suction / pressure feeding means is pulling and moving, and When the piston of the suction / pressure feeding means is pulled, the first on-off valve is instructed to close and the second on-off valve is instructed to open. When the first on-off valve is instructed to maintain the closed state, the second on-off valve and the third on-off valve are instructed to maintain the open state, and when the piston of the suction / pumping means is fully pushed, the third on-off valve is closed. after commanding each finger opening to the first opening and closing valve, the closed to the second on-off valve Intermittent coating apparatus, characterized by. 基材に塗工液を塗工するダイと、該ダイへ塗工液を圧送する圧送手段と、該ダイと該圧送手段の間に設けた断続バルブと、該ダイと該断続バルブの間のダイ側給液路に連通するシリンダ内へピストンを押し引き自在に挿入した第１吸引・圧送手段と、該第１吸引・圧送手段にピストンの押し引きを指令すると共に該断続バルブに開閉を指令する制御装置を備え、該断続バルブを閉じるときに該第１吸引・圧送手段の引くピストンで該ダイ側給液路からシリンダ内へ塗工液を吸引し、該断続バルブを開くときに該第１吸引・圧送手段の押すピストンでシリンダ内から該ダイ側給液路へ塗工液を圧送する間欠塗工装置において、前記ダイ側給液路及び前記第１吸引・圧送手段のシリンダ内の少なくとも一方に第１開閉弁を介して連通するシリンダ内へピストンを押し引き自在に挿入して、該シリンダ内への吸引量が前記第１吸引・圧送手段の吸引量よりも少ない第２吸引・圧送手段を設け、該第２吸引・圧送手段のシリンダ内と前記ダイ側給液路の外側を第２開閉弁を介して連通し、前記制御装置は、前記第１吸引・圧送手段のピストンが引き移動しているときには、該第１開閉弁に閉状態の維持を、該第２開閉弁に閉状態の維持を、第２吸引・圧送手段にピストン押し切り状態の維持をそれぞれ指令し、前記第１吸引・圧送手段のピストンが引き切っているときには、該第１開閉弁に開を、該第２開閉弁に閉状態の維持を、第２吸引・圧送手段にピストン押し切り状態の維持をそれぞれ指令し、前記第１吸引・圧送手段のピストンが押し移動しているときには、該第１開閉弁に開状態の維持を、第２開閉弁に閉状態の維持を、第２吸引・圧送手段にピストンの引きをそれぞれ指令し、前記第１吸引・圧送手段のピストンが押し切っている途中では、該第１開閉弁に閉を、第２開閉弁に開を、第２吸引・圧送手段にピストンの押しをそれぞれ指令し、その後に前記第１吸引・圧送手段のピストンが押し切っているときには、該第１開閉弁に閉状態の維持を、第２開閉弁に閉を、第２吸引・圧送手段にピストンの押し切り状態の維持をそれぞれ指令することを特徴とする間欠塗工装置。A die for coating the substrate with the coating liquid, a pressure feeding means for pumping the coating liquid to the die, an intermittent valve provided between the die and the pressure feeding means, and between the die and the intermittent valve A first suction / pressure feeding means for freely pushing and pulling the piston into a cylinder communicating with the die side liquid supply path, and a command for pushing / pulling the piston to the first suction / pressure feeding means and a command to open / close the intermittent valve A control device for sucking the coating liquid from the die side liquid supply path into the cylinder by a piston pulled by the first suction / pressure feeding means when closing the intermittent valve, and opening the intermittent valve when the intermittent valve is opened. In an intermittent coating apparatus in which a coating liquid is pumped from the cylinder to the die side liquid supply path by a piston pushed by one suction / pressure feeding means, at least in the cylinder of the die side liquid supply path and the first suction / pressure feeding means A cylinder that communicates with one side via a first on-off valve A second suction / pumping means is provided in which the piston is pushed and pulled freely, and the suction amount into the cylinder is smaller than the suction amount of the first suction / pressure feeding means, and the cylinder of the second suction / pressure feeding means The inside and the outside of the die side liquid supply passage are communicated via a second on-off valve, and the control device closes to the first on-off valve when the piston of the first suction / pressure feeding means is pulled. When maintaining the state, instructing the second on-off valve to maintain the closed state, and instructing the second suction / pressure feeding means to maintain the piston push-off state, respectively, and when the piston of the first suction / pressure feeding means is being pulled, The first on-off valve is opened, the second on-off valve is kept closed, the second suction / pressure feeding means is instructed to keep the piston fully pushed, and the piston of the first suction / pressure feeding means is pushed and moved. When the first on-off valve is open The second on-off valve is maintained in a closed state, the second suction / pressure feeding means is instructed to pull the piston, and the piston of the first suction / pressure feeding means is in the middle of being pushed out. Is closed, the second on-off valve is opened, the second suction / pressure feeding means is instructed to push the piston, and the piston of the first suction / pressure feeding means is subsequently pushed down. An intermittent coating apparatus characterized by instructing to maintain the closed state, to close the second on-off valve, and to maintain the piston push-off state to the second suction / pressure feeding means. 基材に塗工液を塗工するダイと、該ダイへ塗工液を圧送する圧送手段と、該ダイと該圧送手段の間に設けた断続バルブと、該ダイと該断続バルブの間のダイ側給液路に連通するシリンダ内へピストンを押し引き自在に挿入した吸引・圧送手段と、該吸引・圧送手段にピストンの押し引きを指令すると共に該断続バルブに開閉を指令する制御装置を備え、該断続バルブを閉じるときに該吸引・圧送手段の引くピストンで該ダイ側給液路からシリンダ内へ塗工液を吸引し、該断続バルブを開くときに該吸引・圧送手段の押すピストンでシリンダ内から該ダイ側給液路へ塗工液を圧送する間欠塗工装置において、前記吸引・圧送手段は、前記シリンダが別個の主シリンダと副シリンダからなり、前記ピスントが主シリンダに挿入した主ピストンと副シリンダに挿入した副ピストンからなり、両ピストンの押し引きを連動させ、前記ダイ側給液路と該副シリンダ内を、前記ダイ側給液路へ向かう逆流を阻止する第１逆止弁で連通し、該副シリンダ内と前記ダイ側給液路の外側を、該副シリンダ内へ向かう逆流を阻止する第２逆止弁で連通したことを特徴とする間欠塗工装置。A die for coating the substrate with the coating liquid, a pressure feeding means for pumping the coating liquid to the die, an intermittent valve provided between the die and the pressure feeding means, and between the die and the intermittent valve A suction / pressure feeding means in which a piston is slidably inserted into a cylinder communicating with the die-side liquid supply path, and a control device for commanding the suction / pressure feeding means to push and pull the piston and to open / close the intermittent valve; A piston that is pulled by the suction / pressure feeding means when the intermittent valve is closed, and sucks the coating liquid from the die side liquid supply passage into the cylinder, and is pushed by the suction / pressure feeding means when the intermittent valve is opened. In the intermittent coating apparatus for pumping the coating liquid from the cylinder to the die side liquid supply path, the suction / pumping means includes a separate main cylinder and a sub-cylinder, and the piston is inserted into the main cylinder. Main piston and secondary It consists of a secondary piston inserted in the Linda, and communicates with the first check valve that prevents the back flow toward the die side liquid supply path by interlocking the pushing and pulling of both pistons. And the intermittent coating apparatus characterized by connecting the inside of this subcylinder and the outer side of the said die side liquid supply path with the 2nd nonreturn valve which blocks | prevents the reverse flow which goes into this subcylinder. 基材に塗工液を塗工するダイと、該ダイへ塗工液を圧送する圧送手段と、該ダイと該圧送手段の間に設けた断続バルブと、該ダイと該断続バルブの間のダイ側給液路に連通するシリンダ内へピストンを押し引き自在に挿入した吸引・圧送手段と、該吸引・圧送手段にピストンの押し引きを指令すると共に該断続バルブに開閉を指令する制御装置を備え、該断続バルブを閉じるときに該吸引・圧送手段の引くピストンで該ダイ側給液路からシリンダ内へ塗工液を吸引し、該断続バルブを開くときに該吸引・圧送手段の押すピストンでシリンダ内から該ダイ側給液路へ塗工液を圧送する間欠塗工装置において、前記吸引・圧送手段は、前記シリンダが別個の主シリンダと副シリンダからなり、前記ピスントが主シリンダに挿入した主ピストンと副シリンダに挿入した副ピストンからなり、両ピストンの押し引きを連動させ、前記ダイ側給液路と該主シリンダ内を第１開閉弁を介して連通し、該主シリンダ内と該副シリンダ内を第２開閉弁を介して連通し、該副シリンダ内と前記ダイ側給液路の外側を第３開閉弁を介して連通し、前記制御装置は、前記吸引・圧送手段の両ピストンが引き移動しているときには、該第１開閉弁に開状態の維持を、該第２開閉弁に開状態の維持を、該第３開閉弁に閉状態の維持をそれぞれ指令し、前記吸引・圧送手段の両ピストンが引き切っているときには、該第１開閉弁に開状態の維持を、該第２開閉弁に閉を、該第３開閉弁に開をそれぞれ指令し、前記吸引・圧送手段のピストンが押し移動しているときには、該第１開閉弁に開状態の維持を、該第２開閉弁に閉状態の維持を、該第３開閉弁に開状態の維持をそれぞれ指令し、前記吸引・圧送手段のピストンが押し切っている途中では、該第１開閉弁に閉を、該第２開閉弁に閉状態の維持を、該第３開閉弁に開状態の維持をそれぞれ指令し、その後に前記吸引・圧送手段の両ピストンが押し切っているときには、該第１開閉弁に開を、該第２開閉弁に開を、該第３開閉弁に閉をそれぞれ指令することを特徴とする間欠塗工装置。A die for coating the substrate with the coating liquid, a pressure feeding means for pumping the coating liquid to the die, an intermittent valve provided between the die and the pressure feeding means, and between the die and the intermittent valve A suction / pressure feeding means in which a piston is slidably inserted into a cylinder communicating with the die-side liquid supply path, and a control device for commanding the suction / pressure feeding means to push and pull the piston and to open / close the intermittent valve; A piston that is pulled by the suction / pressure feeding means when the intermittent valve is closed, and sucks the coating liquid from the die side liquid supply passage into the cylinder, and is pushed by the suction / pressure feeding means when the intermittent valve is opened. In the intermittent coating apparatus for pumping the coating liquid from the cylinder to the die side liquid supply path, the suction / pumping means includes a separate main cylinder and a sub-cylinder, and the piston is inserted into the main cylinder. Main piston and secondary It consists of a sub-piston inserted into the Linda, interlocking the pushing and pulling of both pistons, communicating the die side liquid supply passage and the inside of the main cylinder via the first on-off valve, and the inside of the main cylinder and the sub cylinder Communicating through the second on-off valve, communicating the inside of the sub cylinder and the outside of the die side liquid supply passage through the third on-off valve, and the control device pulls and moves both pistons of the suction / pressure feeding means The first on-off valve is instructed to maintain the open state, the second on-off valve is instructed to maintain the open state, and the third on-off valve is instructed to maintain the closed state. When both pistons are pulled, the first on-off valve is instructed to maintain the open state, the second on-off valve is closed, and the third on-off valve is instructed to open. When pushing, the first on-off valve is kept open, and the second open The valve is instructed to maintain the closed state, and the third on-off valve is instructed to maintain the open state. While the piston of the suction / pressure feeding means is fully pushed, the first on-off valve is closed and the second on-off valve is closed. When the valve is instructed to maintain the closed state and the third on-off valve is instructed to maintain the open state, and then both pistons of the suction / pressure feeding means are pushed down, the first on-off valve is opened. An intermittent coating apparatus characterized by instructing the second on-off valve to open and the third on-off valve to close. 基材に塗工液を塗工するダイと、該ダイへ塗工液を圧送する圧送手段と、該ダイと該圧送手段の間に設けた断続バルブと、該ダイと該断続バルブの間のダイ側給液路に連通するシリンダ内へピストンを押し引き自在に挿入した吸引・圧送手段と、該吸引・圧送手段にピストンの押し引きを指令すると共に該断続バルブに開閉を指令する制御装置を備え、該断続バルブを閉じるときに該吸引・圧送手段の引くピストンで該ダイ側給液路からシリンダ内へ塗工液を吸引し、該断続バルブを開くときに該吸引・圧送手段の押すピストンでシリンダ内から該ダイ側給液路へ塗工液を圧送する間欠塗工装置において、前記吸引・圧送手段は、前記シリンダが主シリンダと複数個の副シリンダからなり、前記ピスントが主シリンダに挿入した主ピストンと各副シリンダに挿入した副ピストンとからなり、これらピストンの押し引きを連動させ、前記ダイ側給液路と該主シリンダ内を第１開閉弁を介して連通し、該主シリンダ内と該各副シリンダ内を個別に第２開閉弁を介して連通し、該各副シリンダ内と前記ダイ側給液路の外側を個別に第３開閉弁を介して連通し、前記制御装置は、任意個数の副シリンダ内へ連通する第２開閉弁に開状態の維持を、この任意個数の副シリンダ内へ連通する第３開閉弁に閉状態の維持をそれぞれ指令し、前記吸引・圧送手段のこれらピストンが引き移動しているときには、該第１開閉弁に開状態の維持を、残りの第２開閉弁に開状態の維持を、残りの第３開閉弁に閉状態の維持をそれぞれ指令し、前記吸引・圧送手段のこれらピストンが引き切っているときには、該第１開閉弁に開状態の維持を、残りの第２開閉弁に閉を、残りの第３開閉弁に開をそれぞれ指令し、前記吸引・圧送手段のこれらピストンが押し移動しているときには、該第１開閉弁に開状態の維持を、残りの第２開閉弁に閉状態の維持を、残りの第３開閉弁に開状態の維持をそれぞれ指令し、前記吸引・圧送手段のこれらピストンが押し切っている途中では、該第１開閉弁に閉を、残りの第２開閉弁に閉状態の維持を、残りの第３開閉弁に開状態の維持をそれぞれ指令し、その後に前記吸引・圧送手段のピストンが押し切っているときには、該第１開閉弁に開を、残りの第２開閉弁に開を、残りの第３開閉弁に閉をそれぞれ指令することを特徴とする間欠塗工装置。A die for coating the substrate with the coating liquid, a pressure feeding means for pumping the coating liquid to the die, an intermittent valve provided between the die and the pressure feeding means, and between the die and the intermittent valve A suction / pressure feeding means in which a piston is slidably inserted into a cylinder communicating with the die-side liquid supply path, and a control device for commanding the suction / pressure feeding means to push and pull the piston and to open / close the intermittent valve; A piston that is pulled by the suction / pressure feeding means when the intermittent valve is closed, and sucks the coating liquid from the die side liquid supply passage into the cylinder, and is pushed by the suction / pressure feeding means when the intermittent valve is opened. In the intermittent coating apparatus for pumping the coating liquid from the cylinder to the die side liquid supply path, the suction / pressure feeding means includes a main cylinder and a plurality of sub cylinders, and the piston is connected to the main cylinder. With the inserted main piston The piston comprises a secondary piston inserted in the secondary cylinder. The piston side push-pull is linked to communicate the die side liquid supply passage and the main cylinder through the first on-off valve. The cylinders are individually communicated via the second on-off valves, and the insides of the sub-cylinders and the outside of the die side liquid supply passage are individually communicated via the third on-off valves. The second on-off valve communicating with the sub-cylinder is instructed to maintain the open state, and the third on-off valve communicating with the arbitrary number of sub-cylinders is instructed to maintain the closed state. When pulling, the first on-off valve is instructed to maintain the open state, the remaining second on-off valve is instructed to maintain the open state, and the remaining third on-off valve is instructed to maintain the closed state.・ When these pistons of the pressure feeding means are pulled When the first open / close valve is instructed to maintain the open state, the remaining second open / close valve is closed, and the remaining third open / close valve is instructed to open. The first on-off valve is instructed to maintain the open state, the remaining second on-off valves are to be maintained in the closed state, and the remaining third on-off valves are instructed to maintain the open state. In the middle of pushing, the first on-off valve is closed, the remaining second on-off valves are instructed to remain closed, and the remaining third on-off valves are instructed to remain open. An intermittent coating apparatus characterized in that when the piston of the pressure feeding means is fully pushed, the first on-off valve is instructed to open, the remaining second on-off valves are opened, and the remaining third on-off valves are instructed to close. .
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