JP2004195888A - Temperature control device for heat treatment roller - Google Patents

Temperature control device for heat treatment roller Download PDF

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Publication number
JP2004195888A
JP2004195888A JP2002369362A JP2002369362A JP2004195888A JP 2004195888 A JP2004195888 A JP 2004195888A JP 2002369362 A JP2002369362 A JP 2002369362A JP 2002369362 A JP2002369362 A JP 2002369362A JP 2004195888 A JP2004195888 A JP 2004195888A
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Prior art keywords
temperature
heat
heat treatment
roller
fluid
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JP2002369362A
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JP3842210B2 (en
Inventor
Kozo Okamoto
幸三 岡本
Toru Tonomura
徹 外村
Toshiki Hanabusa
利樹 花房
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Tokuden Co Ltd Kyoto
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Tokuden Co Ltd Kyoto
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Priority to JP2002369362A priority Critical patent/JP3842210B2/en
Priority to EP03021449A priority patent/EP1403607B1/en
Priority to DE60331713T priority patent/DE60331713D1/en
Priority to US10/667,307 priority patent/US6992272B2/en
Priority to CNB031603505A priority patent/CN100473513C/en
Publication of JP2004195888A publication Critical patent/JP2004195888A/en
Priority to US11/186,861 priority patent/US7420141B2/en
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Publication of JP3842210B2 publication Critical patent/JP3842210B2/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a temperature control device for a heat treatment roller which can enable homogeneous heat treatment of a material to be treated without the need to increase the size of a heat exchanger or a pump. <P>SOLUTION: The temperature control device for a heat treatment roller is provided with a heat treatment roller 1, through which a heat medium fluid 6 is passed and which heat-treats a material to be treated 13 being passed over the surface thereof, a first temperature control means 15 for comparing the temperature of the heat medium fluid supplied to the roller 1 with a first set temperature S1 and for outputting the comparison result, a second temperature control means 16 for comparing the surface temperature of the roller 1 with a second setting temperature S2 and for outputting the comparison result, and a switching means 17 which switches the output to the output of the second temperature control means 16, in the case where the difference between the fluid temperature and the second setting temperature S2 falls within a predetermined range A, and switches to the output of the first temperature control means 15 in the case where the difference exceeds the predetermined range A. The heating or cooling level of the heat exchanger 7 is controlled by the output of the switching means 17 to always hold the surface temperature of the heat treatment roller 1 constant. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、流体を熱媒体として樹脂フィルムなどの処理物を加熱又は奪熱処理する熱処理ローラの温度制御装置に関する。
【０００２】
【従来の技術】
樹脂フィルムなどの処理物をローラに掛け、ローラに当接して通過する間に処理物を所定の温度に加熱したり、高温の処理物を所定の温度にまで奪熱することが行われている。加熱処理する場合、ローラは加熱処理に必要な温度に高められ、奪熱処理する場合、処理物からの奪熱作用によってローラ自体の温度が上昇するので、処理物の冷却に適応する温度までローラを冷却する。いずれの場合も熱を移送する媒体を必要とし、その媒体として流体たとえば油が使用されている。すなわち、適温の流体をローラの内部を通過させ、この流体でローラを加熱又はローラから奪熱するようにしている。
【０００３】
図３はこのような熱媒流体により加熱又は奪熱する場合のローラ装置の概略構成を示すもので、図３において、１はローラ本体を構成するロールシェル、２は図示しないモータにより回転してロールシェルを回転する回転駆動軸、３は中子、４はロータリジョイント、５は貯油タンク、６は油（熱媒流体）、７は熱交換器（加熱又は冷却）、８はポンプ、９は温度センサ、１０は温度制御装置、１１は電力制御回路、１２はヒータ、１３はロールシェルに当接して通過する樹脂フィルムなどの処理物である。ロールシェル１は円筒状をなし、その中空内部に中子３が配置され、中子３の中央部を貫通して熱媒通流路３ａが形成されている。熱媒通流路３ａは回転駆動軸２内を経てロータリジョイント４の流入口に連結され、ロールシェル１の内周壁と中子３の外周壁との間で形成された熱媒通流路１ａは回転駆動軸２内を経てロータリジョイント４の出口に連結されている。
【０００４】
すなわち、貯油タンク５の油６は熱交換器７を通り、所定の温度に加熱又は冷却され、その油６がポンプ８によってロールシェル１内に送られ、熱媒通流路３ａおよび１ａを通流し、貯油タンク５へ排出される。処理物１３を加熱する場合には、油６は熱交換器７内のヒータ１２により加熱され、加熱された油６がロールシェル１内の熱媒通流路３aおよび１aを通流し、ロールシェル１は加熱され、その熱でロールシェル１の表面に当接した処理物１３を加熱処理する。
【０００５】
熱交換器７の出力側に、通流する油（熱媒流体）６の温度を検出する温度センサ９が設けられ、温度センサ９の検出温度信号は温度制御装置１０に送られる。温度制御装置１０は、通流する油６の温度を設定する設定温度S（図４参照）が予め入力されており、この設定温度Sと入力された温度センサ９の検出温度信号とを比較し、その偏差に対応する制御信号をサイリスタなどからなる電力制御回路１１に送る。電力制御回路１１は制御信号に応じた電力をヒータ１２に供給し、ヒータ１２はその電力に応じて発熱して油（熱媒流体）６を設定温度Sにまで加熱し、この加熱温度を維持する。
【０００６】
【発明が解決しようとする課題】
しかし、このような油（熱媒流体）６の温度制御では、図４に示すように当初油（熱媒流体）６の温度T1の立ち上がりに対して、ロールシェル１の表面温度T2の立ち上がりが遅く、ロールシェル１の表面温度T2が設定温度Sの近傍にまで上昇するまでの時間ｔ１が長時間となる。特に、ロールシェル１内を通流する油（熱媒流体）６の少ない場合には、ロールシェル１の油（熱媒流体）６が通流する伝熱面（内面）における熱伝達率が低くなるため、その時間は長くなる傾向がある。
【０００７】
また、設定温度Sに制御された油（熱媒流体）６が、途中の配管で温度が低下したり、ロールシェル１の油（熱媒流体）６が通流する伝熱面（内面）から表面（外面）までの肉厚内に生じる温度差などにより、図４に示すように、ロールシェル１の表面温度T2と油（熱媒流体）６の温度T1とに偏差ｄ１が発生し、その偏差はロールシェル１の表面に処理物１３が当接通過すると、処理物１３が熱を奪うため表面温度は降下して大きくｄ２なり、これらを防止するためには油（熱媒流体）６の流量を上げなければならず、そのために熱交換器やポンプを大型にしなければならないという問題があった。
【０００８】
本発明は、このような問題を解消すべくなされたもので、熱交換器やポンプを大型化することなく、処理物の均一な熱処理を可能にする熱処理ローラの温度制御装置を提供することを目的とする。
【０００９】
【課題を解決するための手段】
請求項１に係る本発明は、内部に熱媒流体を通流し表面に当接する処理物を熱処理する熱処理ローラと、前記熱処理ローラに熱媒流体を供給する熱媒流体供給手段と、前記熱媒流体供給手段から供給する熱媒流体の温度を検出する第１の温度センサと、前記第１の温度センサの検出温度と第１の設定温度とを比較して前記熱媒流体の温度を前記第１の設定温度に制御する第１の温度制御手段と、前記熱処理ローラの表面温度を検出する第２の温度センサと、前記第２の温度センサの検出温度と前記第１の設定温度と異なる第２の設定温度とを比較して前記熱媒流体の温度を前記第２の設定温度に制御する第２の温度制御手段と、前記第２の温度センサの検出温度と前記第２の設定温度との差が所定の範囲内のとき前記第２の温度制御手段に、前記所定の範囲を越えるとき前記第１の温度制御手段に切り換える切換手段とを備えてなることを特徴とする。
【００１０】
請求項２に係る本発明は、内部に加熱流体を通流し表面に当接する処理物を加熱処理する熱処理ローラと、前記熱処理ローラに加熱流体を供給する加熱流体供給手段と、前記加熱流体供給手段から供給する加熱流体の温度を検出する第１の温度センサと、前記第１の温度センサの検出温度と第１の設定温度とを比較して前記加熱流体の温度を前記第１の設定温度に制御する第１の温度制御手段と、前記熱処理ローラの表面温度を検出する第２の温度センサと、前記第２の温度センサの検出温度と前記第１の設定温度よりも低い第２の設定温度とを比較して前記加熱流体の温度を前記第２の設定温度に制御する第２の温度制御手段と、前記第２の温度センサの検出温度と前記第２の設定温度との差が所定値以内のとき前記第２の温度制御手段に、前記所定値を越えるとき前記第１の温度制御手段に切り換える切換手段とを備えてなることを特徴とする。
【００１１】
請求項３に係る本発明は、内部に奪熱流体を通流し表面に当接する処理物を熱処理する熱処理ローラと、前記熱処理ローラに奪熱流体を供給する奪熱流体供給手段と、前記奪熱流体供給手段から供給する奪熱流体の温度を検出する第１の温度センサと、前記第１の温度センサの検出温度と第１の設定温度とを比較して前記奪熱流体の温度を前記第１の設定温度に制御する第１の温度制御手段と、前記熱処理ローラの表面温度を検出する第２の温度センサと、前記第２の温度センサの検出温度と前記第１の設定温度よりも高い第２の設定温度とを比較して前記加熱流体の温度を前記第２の設定温度に制御する第２の温度制御手段と、前記第２の温度センサの検出温度と前記第２の設定温度との差が所定値以内のとき前記第２の温度制御手段に、前記所定値を越えるとき前記第１の温度制御手段に切り換える切換手段とを備えてなることを特徴とする。
【００１２】
請求項４に係る本発明は、請求項１又は請求項２又は請求項３に記載の発明において、熱処理ローラの表面温度を検出する第２の温度センサをローラ表面に近接する肉厚内に挿入してなることを特徴とし、請求項５に係る本発明は、請求項１又は請求項２又は請求項３又は請求項４に記載の発明において、 熱処理ローラの肉厚内部に長手方向に沿って気液2相の熱媒体を封入する密閉室を設けてなることを特徴とし、請求項６に係る本発明は、請求項１ないし請求項５のいずれかに記載の発明において、熱処理ローラに電磁誘導発熱機構を付加してなることを特徴とする。
【００１３】
本発明では、ローラの表面温度が、その目標値（第２の設定温度）の所定の範囲よりも低い（奪熱の場合は高い）ときには、熱媒流体の温度をローラの表面温度の目標値よりも高く（奪熱の場合は低く）設定（第１の設定温度）した温度制御手段（第１の温度制御手段）で制御し、ローラの表面温度が、その目標値（第２の設定温度）の所定の範囲内のときには、熱媒流体の温度をローラの表面温度の目標値に設定（第２の設定温度）した温度制御手段（第２の温度制御手段）で制御するので、ローラの表面温度がその目標値よりもかけ離れて低い当初は、ローラの表面温度をその目標値近傍にまで迅速に立ち上げられる。
【００１４】
また、ローラの表面温度が目標値に到達後、処理物のローラ表面の通過により表面温度が降下（奪熱の場合は上昇）し、この降下がローラ表面温度の目標値に対して所定の範囲、例えばその目標値の１０％（適宜）を越えると、熱媒流体の温度をローラの表面温度の目標値よりも高く（奪熱の場合は低く）設定（第１の設定温度）した温度制御手段（第１の温度制御手段）で制御するので、ローラの表面温度は目標値にほぼ維持され、熱交換器やポンプを大型化することなく、処理物の均一な熱処理を可能にする。
【００１５】
また、熱処理ローラの表面温度を検出する第２の温度センサをローラ表面に近接する肉厚内にローラの肉厚内部に挿入するようにするとローラ表面の温度を正確かつ安定に検出することができるとともに、温度センサと処理物との干渉を防止することができる。 さらに、ローラの長手方向に沿って形成した密閉室に気液2相の熱媒体を封入しておくと、入り口と出口間で熱媒流体に温度差があっても熱媒体の潜熱移動によりローラの表面は均温に維持され、ローラ表面を通過する処理物の幅方向（ローラの長手方向）の均一な熱処理を可能にするとともに、ローラの表面が均一であることから、表面温度の検出を容易に行うことができる。
【００１６】
【発明の実施の形態】
以下本発明の実施の形態について図を参照して説明する。図１は本発明の実施の形態に係る熱処理ローラの温度制御装置の構成図、図２は図１に示す熱処理ローラの温度制御装置の動作を示す特性図である。なお、図３に示す従来の熱処理ローラの温度制御装置と同一の部分および対応する部分には同一の符号を付している。
【００１７】
図１において、１はローラ本体を構成するロールシェル、２は図示しないモータにより回転してロールシェルを回転する回転駆動軸、３は中子、４はロータリジョイント、５は貯油タンク、６は油（熱媒流体）、７は熱交換器（加熱又は冷却）、８はポンプ、１１はサイリスタなどからなる電力制御回路、１２はヒータ、１３はロールシェルに当接して通過する樹脂フィルムなどの処理物である。
【００１８】
ロールシェル１は円筒状をなし、この例ではその肉厚内部に長手方向に沿う密閉室１ｂと温度センサ挿入孔１ｃが形成され、温度センサ挿入孔１ｃには、ロールシェル１の表面温度を検出する温度センサ１４が配置され、密閉室１ｂ内には、潜熱移動によってロールシェル１の表面の温度を均一化する水などの気液2相の熱媒体１８が封入されている。そして、中空内部に中子３が配置され、中子３の中央部を貫通して熱媒通流路３ａが形成されている。熱媒通流路３ａは回転駆動軸２内を経てロータリジョイント４の流入口に連結され、ロールシェル１の内周壁と中子３の外周壁との間で形成された熱媒通流路１ａは回転駆動軸２内を経てロータリジョイント４の出口に連結されている。
【００１９】
貯油タンク５の油６は熱交換器７を通り、所定の温度に加熱又は冷却され、その油６がポンプ８によってロールシェル１内に送られ、熱媒通流路３ａおよび１ａを通流し、貯油タンク５へ排出される。処理物１３を加熱処理する場合には、油６は熱交換器７内のヒータ１２により加熱され、加熱された油６がロールシェル１内の熱媒通流路３aおよび１aを通流し、その通流によってロールシェル１は加熱され、その熱でロールシェル１の表面に当接通過する処理物１３を加熱処理する。
【００２０】
処理物１３を奪熱する場合には、油６は熱交換器７内の冷媒により冷却され、冷却された油６がロールシェル１内の熱媒通流路３aおよび１aを通流し、その通流によってロールシェル１は奪熱され、その奪熱でロールシェル１の表面に当接通過する処理物１３を奪熱処理する。すなわち、貯油タンク５、熱交換器７およびポンプ８はロールシェル１内に熱媒流体６を供給する熱媒流体供給手段を構成している。
【００２１】
９は熱交換器７からロールシェル１へ供給する熱媒流体の温度を検出する第１の温度センサ、１４はロールシェル１の表面温度を検出する第２の温度センサ、１９は第２の温度センサ１４の検出温度を、回転体のロールから固定体の外部へ取り出すたとえばロータリ変成器、スリップリング、ロータリコネクタなどの回転接続器、１５は予め入力した熱媒流体の温度の目標値（第１の設定温度）S1と第１の温度センサ９で検出した熱媒流体の温度とを比較し、その偏差に応じた制御信号を電力制御回路１１へ出力する第１の温度制御回路（第１の温度制御手段）、１６は予め入力したロールシェル１の表面温度の目標値（第２の設定温度）S２と第２の温度センサ１４で検出したロールシェル１の表面温度とを比較し、その偏差に応じた制御信号を電力制御回路１１へ出力する第２の温度制御回路（第２の温度制御手段）である。
【００２２】
１７は電力制御回路１１へ送る制御信号を、ロールシェル１の表面温度の目標値（第２の設定温度）S２と第２の温度センサ１４で検出したロールシェル１の表面温度とを比較し、その偏差が予め入力した所定値Aの範囲内のときには、第２の温度制御回路が出力する制御信号に、所定値Aの範囲を越えるときには、第１の温度制御回路が出力する制御信号に切り換える切換回路（切換手段）である。
【００２３】
以上のように構成した熱処理ローラの温度制御装置において、たとえば処理物１３を２００℃で加熱処理しようとする場合、ロールシェル１の表面温度の目標値（第２の設定温度）S２を２００℃に、熱媒流体の温度の目標値（第１の設定温度）S1を３００℃に、所定値Aの値をロールシェル１の表面温度の目標値２００℃の１５％程度の３０℃に設定する。なお、これらの数値は説明のためであって、数値自体は適宜に設定するものである。
【００２４】
当初、ロールシェル１の温度は所定値Aの値３０℃よりも遥かに低く、切換回路１７は第１の温度制御回路が出力する制御信号を電力制御回路１１へ送る。電力制御回路１１は最大の電力をヒータ１２に供給し、ロールシェル１へ供給する熱媒流体の温度は図２のT4に示すように急速に立ち上がり、これに追従して図２のT３に示すようにロールシェル１の表面温度も迅速に立ち上がる。ロールシェル１の表面温度が１７０℃（２００℃−３０℃）に到達しない場合、熱媒流体は第１の温度制御回路が出力する制御信号によって加熱が続けられ３００℃に到達するとその温度に維持される。
【００２５】
ロールシェル１の表面温度が１７０℃に到達すると、切換回路１７は切換作動し、第２の温度制御回路が出力する制御信号を電力制御回路１１へ送る。電力制御回路１１はロールシェル１の表面温度すなわち第２の温度センサ１４の検出温度とロールシェル１の表面温度の設定値２００℃との偏差量に応じた電力をヒータ１２に供給し、熱媒流体の温度は図２の時点ｔ１に示すように３００℃から降下するとともに、ロールシェル１の表面温度は設定値２００℃に到達し、第２の温度制御回路が出力する制御信号によってロールシェル１の表面はその温度２００℃に維持される。
【００２６】
その後、処理物１３がロールシェル１の表面に当接（図２の時点ｔ２）すると、ロールシェル１の表面は処理物１３の奪熱により温度が低下するが、その低下によりロールシェル１の表面温度が１７０℃未満になると、切換回路１７は切換作動し、第１の温度制御回路が出力する制御信号を電力制御回路１１へ送る。電力制御回路１１はほぼ最大の電力をヒータ１２に供給し、ロールシェル１へ供給する熱媒流体の温度は図２のｔ２以降に示すように高められ、ロールシェル１の表面温度は迅速に設定値２００℃へ復帰する。処理物１３がロールシェル１の表面に当接通過中この動作が繰替えされ、熱伝達速度と相俟って熱媒流体の温度は処理物１３の奪熱量に見合う温度に維持、すなわちロールシェル１の表面温度を設定値２００℃に維持する。
【００２７】
また、処理物１３を所定の温度にまで奪熱する場合は、その所定の温度をロールシェル１の表面温度の目標値（第２の設定温度）S２、この目標値（第２の設定温度）S２よりも低い温度を熱媒流体の温度の目標値（第１の設定温度）S1とすれば、加熱処理しようとする場合と同様に処理物１３がロールシェル１の表面に当接通過中熱媒流体の温度は処理物１３から奪う熱量に見合う温度に維持、すなわちロールシェル１の表面温度を所定の温度に維持することができる。
【００２８】
なお、以上の実施の形態では、ロールシェルの肉厚内に気液2相の熱媒体を封入する密閉室を設けているが、本発明はこのような密閉室がない場合にも適用できる。また、回転駆動軸の一方に熱媒流体の入り口と出口を有するロータリジョイントを設けているが、回転駆動軸の一方に熱媒流体の入り口を有するロータリジョイントを、他方に出口を有するロータリジョイントを設けるようにしてもよい。さらに、ロールシェルの表面温度を検出する温度センサをロールシェルの肉厚内に配置しているが、図１に点線１４で示すようにロールシェルの表面近傍の外部に配置してもよく、必要に応じて両者を組み合わせるようにしてもよい。温度センサをロールシェルの外部にのみ配置する場合には、ロールシェルの表面温度を取り出すための回転接続器を省略することが可能である。
【００２９】
【発明の効果】
以上説明したように本発明によれば、ローラの表面温度の立ち上がりが速く、ローラ内を通流する熱媒流体の少ない場合においてもローラの表面温度が設定温度の近傍にまで上昇する時間を短くすることができ、かつ、ローラの表面温度と設定温度との間の偏差をほぼなくすことができる。したがって、熱交換器やポンプを大型化する必要がなく、小さい配管およびポンプの採用によって設備費を削減することができる。
【図面の簡単な説明】
【図１】本発明の実施態様に係る熱処理ローラの温度制御装置の構成図である。
【図２】図１に示す熱処理ローラの温度制御装置の動作を示す特性図である。
【図３】従来の熱処理ローラの温度制御装置の構成図である。
【図４】図３に示す熱処理ローラの温度制御装置の動作を示す特性図である。
【符号の説明】
１ ロールシェル
1a 熱媒通流路
１ｂ 密閉室
１ｃ 温度センサ挿入孔
２ 回転駆動軸
３ 中子
３a 熱媒通流路
４ ロータリジョイント
５ 貯油タンク
６ 熱媒流体
７ 熱交換器
８ ポンプ
９ 第１の温度センサ
１１ 電力制御回路
１２ ヒータ
１３ 処理物
１４ 第２の温度センサ
１５ 第１の温度制御回路（第１の温度制御手段）
１６ 第２の温度制御回路（第２の温度制御手段）
１７ 切換回路（切換手段）
１８ 気液2相の熱媒体
１９ 回転接続器[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a temperature control device for a heat treatment roller that heats or heat-treats a processed material such as a resin film using a fluid as a heat medium.
[0002]
[Prior art]
Processes such as a resin film are hung on a roller, and the processed product is heated to a predetermined temperature while passing in contact with the roller, or a high-temperature processed product is heated to a predetermined temperature. . In the case of heat treatment, the temperature of the roller is raised to the temperature required for the heat treatment, and in the case of heat treatment for deprivation, the temperature of the roller itself increases due to the heat removal action from the processed material. Cooling. In each case, a medium for transferring heat is required, and a fluid such as oil is used as the medium. That is, an appropriate temperature fluid is allowed to pass through the inside of the roller, and the fluid is used to heat or remove heat from the roller.
[0003]
FIG. 3 shows a schematic configuration of a roller device when heating or removing heat by such a heat medium fluid. In FIG. 3, reference numeral 1 denotes a roll shell constituting a roller main body, and 2 denotes a roller which is rotated by a motor (not shown). A rotary drive shaft for rotating the roll shell, 3 is a core, 4 is a rotary joint, 5 is an oil storage tank, 6 is oil (heat medium fluid), 7 is a heat exchanger (heating or cooling), 8 is a pump, 9 is A temperature sensor, 10 is a temperature control device, 11 is a power control circuit, 12 is a heater, and 13 is a processed product such as a resin film which passes through the roll shell in contact therewith. The roll shell 1 has a cylindrical shape, and a core 3 is disposed inside the hollow, and a heat medium passage 3 a is formed through the center of the core 3. The heat medium passage 3a is connected to the inlet of the rotary joint 4 through the rotary drive shaft 2 and is formed between the inner peripheral wall of the roll shell 1 and the outer peripheral wall of the core 3. Is connected to the outlet of the rotary joint 4 through the rotary drive shaft 2.
[0004]
That is, the oil 6 in the oil storage tank 5 passes through the heat exchanger 7 and is heated or cooled to a predetermined temperature, and the oil 6 is sent into the roll shell 1 by the pump 8 and passes through the heat medium passages 3a and 1a. It is drained and discharged to the oil storage tank 5. When heating the processed material 13, the oil 6 is heated by the heater 12 in the heat exchanger 7, and the heated oil 6 flows through the heat medium passages 3a and 1a in the roll shell 1, and the roll shell 1 is heated, and the heat heats the processed material 13 in contact with the surface of the roll shell 1.
[0005]
A temperature sensor 9 for detecting the temperature of the flowing oil (heat medium fluid) 6 is provided on the output side of the heat exchanger 7, and a detected temperature signal of the temperature sensor 9 is sent to a temperature control device 10. The temperature control device 10 receives a set temperature S (see FIG. 4) for setting the temperature of the flowing oil 6 in advance, and compares the set temperature S with the input temperature signal detected by the temperature sensor 9. , And sends a control signal corresponding to the deviation to a power control circuit 11 including a thyristor or the like. The power control circuit 11 supplies power corresponding to the control signal to the heater 12, and the heater 12 generates heat according to the power to heat the oil (heat medium fluid) 6 to the set temperature S and maintain the heating temperature. I do.
[0006]
[Problems to be solved by the invention]
However, in such temperature control of the oil (heat medium fluid) 6, as shown in FIG. 4, the rise of the surface temperature T2 of the roll shell 1 with respect to the rise of the temperature T1 of the oil (heat medium fluid) 6 initially. Slowly, the time t1 until the surface temperature T2 of the roll shell 1 rises to near the set temperature S becomes long. In particular, when the amount of the oil (heat medium fluid) 6 flowing through the inside of the roll shell 1 is small, the heat transfer coefficient on the heat transfer surface (inner surface) of the roll shell 1 through which the oil (heat medium fluid) 6 flows is low. Therefore, the time tends to be longer.
[0007]
In addition, the oil (heat medium fluid) 6 controlled to the set temperature S decreases in temperature in a pipe on the way or from the heat transfer surface (inner surface) of the roll shell 1 through which the oil (heat medium fluid) 6 flows. As shown in FIG. 4, a deviation d1 occurs between the surface temperature T2 of the roll shell 1 and the temperature T1 of the oil (heat medium fluid) 6, due to a temperature difference generated within the thickness up to the surface (outer surface). When the processed material 13 passes through the surface of the roll shell 1 in contact with the surface of the roll shell 1, the processed material 13 deprives the heat, and the surface temperature decreases to become d2. In order to prevent these, the oil (heat medium fluid) 6 There was a problem that the flow rate had to be increased, and the heat exchangers and pumps had to be increased in size.
[0008]
The present invention has been made in order to solve such a problem, and it is an object of the present invention to provide a temperature control device of a heat treatment roller that enables uniform heat treatment of a processed material without increasing the size of a heat exchanger or a pump. Aim.
[0009]
[Means for Solving the Problems]
The present invention according to claim 1 is a heat treatment roller that passes a heat medium fluid therein and heat-treats a processing object that comes into contact with a surface; a heat medium fluid supply unit that supplies a heat medium fluid to the heat treatment roller; A first temperature sensor that detects the temperature of the heat transfer fluid supplied from the fluid supply unit, and compares the detected temperature of the first temperature sensor with a first set temperature to determine the temperature of the heat transfer fluid. First temperature control means for controlling to a first set temperature, a second temperature sensor for detecting a surface temperature of the heat treatment roller, and a second temperature sensor different from the detected temperature of the second temperature sensor and the first set temperature. Second temperature control means for comparing the temperature of the heat transfer fluid to the second set temperature by comparing the set temperature with the second set temperature, the detected temperature of the second temperature sensor, and the second set temperature. When the difference is within a predetermined range, the second temperature control means: When exceeding the serial predetermined range, characterized by comprising a switching means for switching to the first temperature control means.
[0010]
According to a second aspect of the present invention, there is provided a heat treatment roller configured to heat a treatment object flowing through the inside thereof and abutting the surface thereof, a heating fluid supply unit configured to supply the heating fluid to the heat treatment roller, and the heating fluid supply unit. A first temperature sensor for detecting the temperature of the heating fluid supplied from the first temperature sensor, and comparing the detected temperature of the first temperature sensor with a first set temperature to set the temperature of the heating fluid to the first set temperature. First temperature control means for controlling, a second temperature sensor for detecting a surface temperature of the heat treatment roller, and a second set temperature lower than the detected temperature of the second temperature sensor and the first set temperature A second temperature control means for controlling the temperature of the heating fluid to the second set temperature by comparing the temperature of the heating fluid with the second set temperature, and a difference between the detected temperature of the second temperature sensor and the second set temperature is a predetermined value. Within the second temperature control means Characterized by comprising a switching means for switching to the first temperature control means when exceeding the predetermined value.
[0011]
The present invention according to claim 3 is a heat treatment roller for passing a heat removal fluid through the inside thereof and heat-treating a processing object contacting a surface, a heat removal fluid supply means for supplying the heat removal fluid to the heat treatment roller, and the heat removal. A first temperature sensor for detecting the temperature of the heat removal fluid supplied from the fluid supply means, and comparing the detected temperature of the first temperature sensor with a first set temperature to determine the temperature of the heat removal fluid. First temperature control means for controlling to a first set temperature, a second temperature sensor for detecting a surface temperature of the heat treatment roller, and a detected temperature of the second temperature sensor which is higher than the first set temperature. Second temperature control means for comparing the temperature of the heating fluid to the second set temperature by comparing the temperature with the second set temperature, and detecting the second temperature sensor and the second set temperature. When the difference is within a predetermined value, the second temperature control means: Serial characterized by comprising a switching means for switching to the first temperature control means when exceeding a predetermined value.
[0012]
According to a fourth aspect of the present invention, in the first or second or third aspect of the present invention, a second temperature sensor for detecting a surface temperature of the heat treatment roller is inserted in a thickness close to the roller surface. According to a fifth aspect of the present invention, in the first aspect, the second aspect, the third aspect, or the fourth aspect, the heat treatment roller is formed along the longitudinal direction inside the thickness of the heat treatment roller. A closed chamber for enclosing a gas-liquid two-phase heat medium is provided. The present invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein It is characterized by adding an induction heating mechanism.
[0013]
In the present invention, when the surface temperature of the roller is lower than a predetermined range of the target value (second set temperature) (high in the case of heat removal), the temperature of the heat transfer fluid is set to the target value of the surface temperature of the roller. The temperature is controlled by a temperature control unit (first temperature control unit) set higher (lower in the case of heat removal) (first set temperature), and the surface temperature of the roller is set to its target value (second set temperature). If the temperature is within the predetermined range, the temperature of the heat transfer fluid is controlled by the temperature control means (second temperature control means) which is set to the target value of the surface temperature of the roller (second set temperature). When the surface temperature is much lower than the target value, the surface temperature of the roller is quickly raised to near the target value.
[0014]
Further, after the surface temperature of the roller reaches the target value, the surface temperature decreases (increases in the case of heat removal) due to the passage of the processed material on the roller surface, and this decrease is within a predetermined range with respect to the target value of the roller surface temperature. For example, when the target temperature exceeds 10% (appropriate) of the target value, the temperature of the heat medium fluid is set higher (lower in the case of heat removal) than the target value of the surface temperature of the roller (first set temperature). Since the control is performed by the means (first temperature control means), the surface temperature of the roller is almost maintained at the target value, and uniform heat treatment of the processed material is enabled without increasing the size of the heat exchanger or the pump.
[0015]
When the second temperature sensor for detecting the surface temperature of the heat treatment roller is inserted into the thickness of the roller within the thickness close to the surface of the roller, the temperature of the roller surface can be accurately and stably detected. At the same time, interference between the temperature sensor and the processing object can be prevented. Furthermore, if a gas-liquid two-phase heat medium is sealed in a sealed chamber formed along the longitudinal direction of the roller, even if there is a temperature difference in the heat medium fluid between the entrance and the exit, the roller will move due to the latent heat transfer of the heat medium. The surface is maintained at a uniform temperature, enabling uniform heat treatment in the width direction (longitudinal direction of the roller) of the workpiece passing through the roller surface, and detecting the surface temperature because the roller surface is uniform. It can be done easily.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a temperature control device for a heat treatment roller according to an embodiment of the present invention, and FIG. 2 is a characteristic diagram showing an operation of the temperature control device for a heat treatment roller shown in FIG. Note that the same reference numerals are given to the same portions and corresponding portions as those of the conventional heat treatment roller temperature control device shown in FIG.
[0017]
In FIG. 1, 1 is a roll shell constituting a roller body, 2 is a rotary drive shaft that rotates a roll shell by a motor (not shown), 3 is a core, 4 is a rotary joint, 5 is an oil storage tank, and 6 is oil. (Heat medium fluid), 7 is a heat exchanger (heating or cooling), 8 is a pump, 11 is a power control circuit composed of a thyristor, etc., 12 is a heater, 13 is a treatment of a resin film or the like passing through the roll shell in contact therewith. Things.
[0018]
The roll shell 1 has a cylindrical shape. In this example, a sealed chamber 1b and a temperature sensor insertion hole 1c are formed in the thickness of the roll shell 1 along the longitudinal direction, and the surface temperature of the roll shell 1 is detected in the temperature sensor insertion hole 1c. A temperature sensor 14 is disposed, and a two-phase gas-liquid heat medium 18 such as water for sealing the temperature of the surface of the roll shell 1 by latent heat transfer is sealed in the closed chamber 1b. The core 3 is disposed inside the hollow, and the heat medium passage 3a is formed through the center of the core 3. The heat medium passage 3a is connected to the inlet of the rotary joint 4 through the rotary drive shaft 2 and is formed between the inner peripheral wall of the roll shell 1 and the outer peripheral wall of the core 3. Is connected to the outlet of the rotary joint 4 through the rotary drive shaft 2.
[0019]
The oil 6 in the oil storage tank 5 passes through the heat exchanger 7 and is heated or cooled to a predetermined temperature, and the oil 6 is sent into the roll shell 1 by the pump 8 and flows through the heat medium passages 3a and 1a. It is discharged to the oil storage tank 5. When heat-treating the processed material 13, the oil 6 is heated by the heater 12 in the heat exchanger 7, and the heated oil 6 flows through the heat medium passages 3a and 1a in the roll shell 1, and The roll shell 1 is heated by the flow, and the heat heats the processed material 13 that abuts and passes on the surface of the roll shell 1.
[0020]
In the case of removing heat from the processed material 13, the oil 6 is cooled by the refrigerant in the heat exchanger 7, and the cooled oil 6 flows through the heat medium passages 3a and 1a in the roll shell 1, and the oil 6 is cooled. The roll shell 1 is deprived of heat by the flow, and the deprived heat deprives the processed material 13 that comes into contact with and passes over the surface of the roll shell 1. That is, the oil storage tank 5, the heat exchanger 7, and the pump 8 constitute a heating medium fluid supply unit that supplies the heating medium fluid 6 into the roll shell 1.
[0021]
9 is a first temperature sensor for detecting the temperature of the heat transfer fluid supplied from the heat exchanger 7 to the roll shell 1, 14 is a second temperature sensor for detecting the surface temperature of the roll shell 1, and 19 is a second temperature A rotary connector, such as a rotary transformer, a slip ring, or a rotary connector, for extracting the temperature detected by the sensor 14 from the roll of the rotating body to the outside of the fixed body, a reference numeral 15 denotes a previously input target value of the temperature of the heat transfer fluid (first A first temperature control circuit (first temperature control circuit) that compares the temperature of the heat medium fluid detected by the first temperature sensor 9 and outputs a control signal corresponding to the deviation to the power control circuit 11. The temperature control means 16 compares the target value (second set temperature) S2 of the surface temperature of the roll shell 1 input in advance with the surface temperature of the roll shell 1 detected by the second temperature sensor 14, and the deviation thereof. Control signal according to A second temperature control circuit for outputting to the power control circuit 11 (second temperature control means).
[0022]
Reference numeral 17 compares a control signal sent to the power control circuit 11 with a target value (second set temperature) S2 of the surface temperature of the roll shell 1 and the surface temperature of the roll shell 1 detected by the second temperature sensor 14, When the deviation is within the range of the predetermined value A input in advance, the control signal is switched to the control signal output by the second temperature control circuit, and when the deviation exceeds the range of the predetermined value A, the control signal is switched to the control signal output by the first temperature control circuit. It is a switching circuit (switching means).
[0023]
In the temperature control device of the heat treatment roller configured as described above, for example, when the processing object 13 is to be heat-treated at 200 ° C., the target value (second set temperature) S2 of the surface temperature of the roll shell 1 is set to 200 ° C. Then, the target value (first set temperature) S1 of the temperature of the heat medium fluid is set to 300 ° C., and the value of the predetermined value A is set to 30 ° C. which is about 15% of the target value 200 ° C. of the surface temperature of the roll shell 1. These numerical values are for explanation, and the numerical values themselves are appropriately set.
[0024]
Initially, the temperature of the roll shell 1 is much lower than the predetermined value A of 30 ° C., and the switching circuit 17 sends a control signal output from the first temperature control circuit to the power control circuit 11. The power control circuit 11 supplies the maximum power to the heater 12, and the temperature of the heat transfer fluid supplied to the roll shell 1 rapidly rises as shown by T4 in FIG. 2 and follows this, and is shown by T3 in FIG. Thus, the surface temperature of the roll shell 1 rises quickly. When the surface temperature of the roll shell 1 does not reach 170 ° C. (200 ° C.-30 ° C.), the heating medium fluid is continuously heated by the control signal output from the first temperature control circuit, and is maintained at that temperature when it reaches 300 ° C. Is done.
[0025]
When the surface temperature of the roll shell 1 reaches 170 ° C., the switching circuit 17 performs a switching operation, and sends a control signal output from the second temperature control circuit to the power control circuit 11. The power control circuit 11 supplies power to the heater 12 in accordance with the amount of deviation between the surface temperature of the roll shell 1, that is, the detected temperature of the second temperature sensor 14 and the set value of the surface temperature of the roll shell 1 at 200 ° C. The temperature of the fluid drops from 300 ° C. as shown at time t1 in FIG. 2, and the surface temperature of the roll shell 1 reaches the set value of 200 ° C., and the control signal output by the second temperature control circuit causes the roll shell 1 Is maintained at a temperature of 200.degree.
[0026]
Thereafter, when the processed material 13 contacts the surface of the roll shell 1 (time t2 in FIG. 2), the temperature of the surface of the roll shell 1 decreases due to heat removal of the processed material 13, but the temperature decreases. When the temperature falls below 170 ° C., the switching circuit 17 performs a switching operation, and sends a control signal output from the first temperature control circuit to the power control circuit 11. The power control circuit 11 supplies almost the maximum power to the heater 12, the temperature of the heat transfer fluid supplied to the roll shell 1 is increased as shown after t2 in FIG. 2, and the surface temperature of the roll shell 1 is quickly set. Returns to a value of 200 ° C. This operation is repeated while the processing object 13 passes through the surface of the roll shell 1, and the temperature of the heat medium fluid is maintained at a temperature commensurate with the heat removal of the processing object 13, that is, the roll shell The surface temperature of No. 1 is maintained at a set value of 200 ° C.
[0027]
Further, when the heat of the processing object 13 is reduced to a predetermined temperature, the predetermined temperature is set to a target value (second set temperature) S2 of the surface temperature of the roll shell 1, and the target value (second set temperature) If a temperature lower than S2 is set as the target value (first set temperature) S1 of the temperature of the heat medium fluid, the heat during the passage of the processed material 13 in contact with the surface of the roll shell 1 is the same as in the case of performing the heat treatment. The temperature of the medium fluid can be maintained at a temperature commensurate with the amount of heat deprived of the processing object 13, that is, the surface temperature of the roll shell 1 can be maintained at a predetermined temperature.
[0028]
In the above embodiment, a closed chamber for enclosing a gas-liquid two-phase heat medium is provided within the thickness of the roll shell. However, the present invention can be applied even when such a closed chamber is not provided. In addition, a rotary joint having an inlet and an outlet for the heat medium fluid is provided on one of the rotary drive shafts, a rotary joint having an inlet for the heat medium fluid on one of the rotary drive shafts, and a rotary joint having an outlet on the other. It may be provided. Further, although the temperature sensor for detecting the surface temperature of the roll shell is disposed within the thickness of the roll shell, it may be disposed outside near the surface of the roll shell as shown by a dotted line 14 in FIG. May be combined according to the conditions. If the temperature sensor is arranged only outside the roll shell, it is possible to omit a rotary connector for extracting the surface temperature of the roll shell.
[0029]
【The invention's effect】
As described above, according to the present invention, the rise of the surface temperature of the roller is fast, and the time when the surface temperature of the roller rises to near the set temperature is shortened even when the amount of the heat medium flowing through the roller is small. And the deviation between the roller surface temperature and the set temperature can be substantially eliminated. Therefore, it is not necessary to increase the size of the heat exchanger and the pump, and the equipment cost can be reduced by employing small piping and a pump.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a temperature control device of a heat treatment roller according to an embodiment of the present invention.
FIG. 2 is a characteristic diagram illustrating an operation of the temperature control device of the heat treatment roller illustrated in FIG. 1;
FIG. 3 is a configuration diagram of a conventional heat treatment roller temperature control device.
FIG. 4 is a characteristic diagram showing an operation of the temperature control device of the heat treatment roller shown in FIG. 3;
[Explanation of symbols]
1 Roll shell
1a Heat medium passage 1b Sealed chamber 1c Temperature sensor insertion hole 2 Rotating drive shaft 3 Core 3a Heat medium passage 4 Rotary joint 5 Oil storage tank 6 Heat medium fluid 7 Heat exchanger 8 Pump 9 First temperature sensor 11 Power control circuit 12 Heater 13 Workpiece 14 Second temperature sensor 15 First temperature control circuit (first temperature control means)
16. Second temperature control circuit (second temperature control means)
17 Switching circuit (switching means)
18 Gas-liquid two-phase heat carrier 19 Rotary connector

Claims (6)

内部に熱媒流体を通流し表面に当接する処理物を熱処理する熱処理ローラと、前記熱処理ローラに熱媒流体を供給する熱媒流体供給手段と、前記熱媒流体供給手段から供給する熱媒流体の温度を検出する第１の温度センサと、前記第１の温度センサの検出温度と第１の設定温度とを比較して前記熱媒流体の温度を前記第１の設定温度に制御する第１の温度制御手段と、前記熱処理ローラの表面温度を検出する第２の温度センサと、前記第２の温度センサの検出温度と前記第１の設定温度と異なる第２の設定温度とを比較して前記熱媒流体の温度を前記第２の設定温度に制御する第２の温度制御手段と、前記第２の温度センサの検出温度と前記第２の設定温度との差が所定の範囲内のとき前記第２の温度制御手段に、前記所定の範囲を越えるとき前記第１の温度制御手段に切り換える切換手段とを備えてなることを特徴とする熱処理ローラの温度制御装置。A heat treatment roller for heat-treating a processing object flowing through the heat medium fluid and abutting the surface, a heat medium fluid supply unit for supplying a heat medium fluid to the heat treatment roller, and a heat medium fluid supplied from the heat medium fluid supply unit A first temperature sensor for detecting the temperature of the first temperature sensor and a first temperature for controlling the temperature of the heat transfer fluid to the first set temperature by comparing the detected temperature of the first temperature sensor with a first set temperature. Temperature control means, a second temperature sensor for detecting a surface temperature of the heat treatment roller, and comparing a detected temperature of the second temperature sensor with a second set temperature different from the first set temperature. Second temperature control means for controlling the temperature of the heat medium fluid to the second set temperature, and when a difference between a temperature detected by the second temperature sensor and the second set temperature is within a predetermined range. When the second temperature control means exceeds the predetermined range, Temperature control of the heat treatment rollers, characterized by comprising a switching means for switching to the first temperature control means. 内部に加熱流体を通流し表面に当接する処理物を加熱処理する熱処理ローラと、前記熱処理ローラに加熱流体を供給する加熱流体供給手段と、前記加熱流体供給手段から供給する加熱流体の温度を検出する第１の温度センサと、前記第１の温度センサの検出温度と第１の設定温度とを比較して前記加熱流体の温度を前記第１の設定温度に制御する第１の温度制御手段と、前記熱処理ローラの表面温度を検出する第２の温度センサと、前記第２の温度センサの検出温度と前記第１の設定温度よりも低い第２の設定温度とを比較して前記加熱流体の温度を前記第２の設定温度に制御する第２の温度制御手段と、前記第２の温度センサの検出温度と前記第２の設定温度との差が所定値以内のとき前記第２の温度制御手段に、前記所定値を越えるとき前記第１の温度制御手段に切り換える切換手段とを備えてなることを特徴とする熱処理ローラの温度制御装置。A heat treatment roller for flowing a heating fluid through the inside and heat-treating a processing object contacting the surface; a heating fluid supply unit for supplying a heating fluid to the heat treatment roller; and detecting a temperature of the heating fluid supplied from the heating fluid supply unit. A first temperature sensor, and first temperature control means for comparing the detected temperature of the first temperature sensor with a first set temperature to control the temperature of the heating fluid to the first set temperature. A second temperature sensor for detecting a surface temperature of the heat treatment roller, and comparing the detected temperature of the second temperature sensor with a second set temperature lower than the first set temperature to determine a temperature of the heating fluid. Second temperature control means for controlling the temperature to the second set temperature; and the second temperature control when a difference between a detected temperature of the second temperature sensor and the second set temperature is within a predetermined value. Means to exceed the predetermined value Temperature control of the heat treatment rollers, characterized by comprising a switching means for switching the serial first temperature control means. 内部に奪熱流体を通流し表面に当接する処理物を熱処理する熱処理ローラと、前記熱処理ローラに奪熱流体を供給する奪熱流体供給手段と、前記奪熱流体供給手段から供給する奪熱流体の温度を検出する第１の温度センサと、前記第１の温度センサの検出温度と第１の設定温度とを比較して前記奪熱流体の温度を前記第１の設定温度に制御する第１の温度制御手段と、前記熱処理ローラの表面温度を検出する第２の温度センサと、前記第２の温度センサの検出温度と前記第１の設定温度よりも高い第２の設定温度とを比較して前記奪熱流体の温度を前記第２の設定温度に制御する第２の温度制御手段と、前記第２の温度センサの検出温度と前記第２の設定温度との差が所定値以内のとき前記第２の温度制御手段に、前記所定値を越えるとき前記第１の温度制御手段に切り換える切換手段とを備えてなることを特徴とする熱処理ローラの温度制御装置。A heat-treating roller for passing heat-treating fluid into the inside and heat-treating the processing object contacting the surface; heat-treating fluid supply means for supplying heat-treating fluid to the heat-treating roller; A first temperature sensor for detecting the temperature of the first temperature sensor and a first temperature for comparing the temperature detected by the first temperature sensor with a first set temperature to control the temperature of the heat removal fluid to the first set temperature. Temperature control means, a second temperature sensor for detecting a surface temperature of the heat treatment roller, and comparing a detected temperature of the second temperature sensor with a second set temperature higher than the first set temperature. Second temperature control means for controlling the temperature of the heat removal fluid to the second set temperature, and when a difference between a temperature detected by the second temperature sensor and the second set temperature is within a predetermined value. When the second temperature control means exceeds the predetermined value, Temperature control of the heat treatment rollers, characterized by comprising a switching means for switching to a first temperature control means. 熱処理ローラの表面温度を検出する第２の温度センサをローラ表面に近接する肉厚内に挿入してなることを特徴とする請求項１又は請求項２又は請求項３に記載の熱処理ローラの温度制御装置。4. The temperature of the heat treatment roller according to claim 1, wherein a second temperature sensor for detecting the surface temperature of the heat treatment roller is inserted in a thickness close to the roller surface. Control device. 熱処理ローラの肉厚内部に長手方向に沿って気液2相の熱媒体を封入する密閉室を設けてなることを特徴とする請求項１又は請求項２又は請求項３又は請求項４に記載の熱処理ローラの温度制御装置。The airtight chamber for enclosing a gas-liquid two-phase heat medium is provided along the longitudinal direction inside the thickness of the heat treatment roller. Temperature control device for heat treatment roller. 熱処理ローラに電磁誘導発熱機構を付加してなることを特徴とする請求項１又は請求項２又は請求項３又は請求項４又は請求項５に記載の熱処理ローラの温度制御装置。6. The temperature control device for a heat treatment roller according to claim 1, wherein an electromagnetic induction heating mechanism is added to the heat treatment roller.
JP2002369362A 2002-09-24 2002-12-20 Temperature control device for heat treatment roller Expired - Fee Related JP3842210B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2002369362A JP3842210B2 (en) 2002-12-20 2002-12-20 Temperature control device for heat treatment roller
EP03021449A EP1403607B1 (en) 2002-09-24 2003-09-23 Thermal processing roller and temperature control apparatus for roller
DE60331713T DE60331713D1 (en) 2002-09-24 2003-09-23 Thermal treatment roller and temperature control device provided therefor
US10/667,307 US6992272B2 (en) 2002-09-24 2003-09-23 Thermal processing roller and temperature control apparatus for roller
CNB031603505A CN100473513C (en) 2002-09-24 2003-09-24 Hot-working roller
US11/186,861 US7420141B2 (en) 2002-09-24 2005-07-22 Thermal processing roller and temperature control apparatus for roller

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