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JP2004298947A - Coiling control method for aluminum sheet for printing plate supporter, coiling control apparatus thereof and coiling control program thereof - Google Patents

Coiling control method for aluminum sheet for printing plate supporter, coiling control apparatus thereof and coiling control program thereof Download PDF

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Publication number
JP2004298947A
JP2004298947A JP2003097281A JP2003097281A JP2004298947A JP 2004298947 A JP2004298947 A JP 2004298947A JP 2003097281 A JP2003097281 A JP 2003097281A JP 2003097281 A JP2003097281 A JP 2003097281A JP 2004298947 A JP2004298947 A JP 2004298947A
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Japan
Prior art keywords
winding
printing plate
tension
winding tension
aluminum plate
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JP2003097281A
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Japanese (ja)
Inventor
Katsuhisa Yamamoto
勝久 山本
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Kobe Steel Ltd
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Kobe Steel Ltd
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Priority to JP2003097281A priority Critical patent/JP2004298947A/en
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  • Printing Plates And Materials Therefor (AREA)
  • Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
  • Winding, Rewinding, Material Storage Devices (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for coil control of an aluminum sheet for a printing plate supporter in which coil deviation during the carriage is suppressed in a coil of an aluminum sheet for the printing plate supporter rolled by a conventional rolling machine and having a crown of an adequate size, coil-tightening during the uncoiling operation is suppressed, and the aluminum sheet for the printing plate supporter of excellent flatness is realized with high productivity. <P>SOLUTION: The method for coil control of the aluminum sheet for the printing plate supporter includes a step of coiling the aluminum sheet while controlling the coiling tension. Coiling is started while setting the coiling tension to be at 7.5-15 MPa when starting the coiling of the aluminum sheet for the printing plate supporter. Thereafter, the coiling tension when starting the coiling is successively reduced at the rate of 0.25-2.45 MPa/1,000 m to reach 3-12 MPa. The aluminum sheet for the printing plate supporter is coiled in a coil with the constant coiling tension of 3-12 MPa. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、圧延された印刷版支持体用アルミニウム板を、適切な状態でコイルに巻取ることができる印刷版支持体用アルミニウム板の巻取制御方法及びその巻取制御装置並びにその巻取制御プログラムに関する。
【0002】
【従来の技術】
一般に、印刷版支持体は、JIS H 4000で規定されている純Al系の1050アルミニウムやAl−Mn系の3003アルミニウム合金等から構成され、板厚が0.1〜0.3mm程度のアルミニウム板またはアルミニウム合金板(以下、これらを適宜「アルミニウム板」と総称する)が適用されている。
【0003】
前記印刷版支持体に適用されるアルミニウム板は、他の従来公知の各種アルミニウム板やアルミニウム合金板の製造工程と同様の工程を経て製造される。すなわち、前記純Al系の1050アルミニウムやAl−Mn系の3003アルミニウム合金等を溶解し、鋳造して鋳塊を得た後、この鋳塊に均質化熱処理を施し、更にこの鋳塊を圧延して所望の板厚を有する印刷版支持体用アルミニウム板に適用している。
【0004】
その後、このアルミニウム板にテンションレベラ等を用いて内部応力等の矯正を施して、印刷の際に要求される平坦性を備えた印刷版支持体用アルミニウム板が得られる。そして、通常、この印刷版支持体用アルミニウム板は、ハンドリングを容易にするために巻取られ、コイルの形態とされて印刷版支持体用アルミニウム板の表面処理工程に運搬される。
【0005】
前記印刷版支持体用アルミニウム板を巻取ってコイルを作製する際に、トラック等の輸送手段により前記コイルが輸送される途中でコイルずれが発生しないように、あるいは、前記表面処理工程で前記コイルが巻ほどかれる際に、このコイルで巻締まりが発生しないように前記印刷版支持体用アルミニウム板に一定の巻取張力が付与される。
【0006】
図3(a)、(b)、(c)は、通常の一般的なアルミニウム板が有するクラウン形状の一例及びクラウン率を示す模式図である。図3(a)、(b)、(c)で、横軸は板幅方向であり、縦軸はクラウン率高さであり、hはクラウンの高さを表し、wはこのクラウンの幅を表す。アルミニウム板が有するクラウン形状は、図3(a)に示すようなW形状、図3(b)に示すように部分的に凹部分を有する形状、及び図3(c)に示めすように部分的に凸部分を有する形状に大別される。このようなクラウンの大きさは、通常、アルミニウム板の板厚に対するクラウンの高さの割合であるクラウン率から見積もられる。そして、このクラウン率は、クラウン率(%)=(h/H)×100(Hは、板厚)の式を用いて算出される。
【0007】
本発明者らが知見した所によると、アルミニウム板の前記クラウン率がある程度大きくなると、クラウン率の小さなものと同一仕様のアルミニウム板(同一明細、クラウン率以外の特性が同じであること)をたとえ同一の巻取張力で巻取っても、前記したようなコイルずれやコイルの巻締まりが発生する場合があった。そして、このようにある程度大きなクラウン率を有するアルミニウム板を印刷版支持体に適用すると、表面の平坦性が阻害されて、この印刷版支持体用アルミニウム板を印刷版に適用したときの不良発生率(平坦度不良発生率)が大幅に増大する傾向があった。そこで、例えば、クラウン率が一定値以下となるようにアルミニウム板を作製してこのアルミニウム板を印刷版支持体に適用する方策が提案されている(例えば、特許文献1参照)。
【0008】
【特許文献1】
特開平09−202063号公報(全頁)
【0009】
【発明が解決しようとする課題】
しかし、この場合には、前記クラウン率を一定値以下に抑えるためにアルミニウム板を圧延するための圧延機の性能を向上させることが必要となり、結果としてアルミニウム板の生産性が低下し、ひいてはコストが増大するおそれがある。
【0010】
本発明は前記問題点に鑑みてなされたものであって、その目的は、従来の通常の性能を有する圧延機を用いて圧延され、印刷性能には特に影響を及ぼさない程度の大きさのクラウン率を有する印刷版支持体用アルミニウム板のコイルにおいて、コイルを運搬する際のコイルずれが抑えられるとともに、このコイルを巻きほどく際の巻締まりが抑えられ、なおかつ、平坦性に優れた印刷版支持体用アルミニウム板の生産性を高めて具現することを可能とする印刷版支持体用アルミニウム板の巻取制御方法及びその巻取制御装置並びにその巻取制御プログラムを提供することにある。
【0011】
【課題を解決するための手段】
(1)前記課題を解決するための本発明に係る印刷版支持体用アルミニウム板(アルミニウム板またはアルミニウム合金板)の巻取制御方法は、印刷版支持体用アルミニウム板の巻取張力を制御して前記印刷版支持体用アルミニウム板を巻取コイルに巻取る工程を含む印刷版支持体用アルミニウム板の巻取制御方法であって、前記印刷版支持体用アルミニウム板の巻取開始時の前記巻取張力を7.5〜15MPaに設定して巻取りを開始し、その後、前記巻取開始時の巻取張力を0.25〜2.45MPa/1000mで順次低減させて3〜12MPaとした後、この3〜12MPaの巻取張力を一定として前記印刷版支持体用アルミニウム板を巻取コイルに巻取られるように構成される。
【0012】
このように構成すれば、印刷版支持体用アルミニウム板の巻取張力を適切に制御しながら巻取るので、比較的大きなクラウン率(例えば、1%程度)を有する印刷版支持体用アルミニウム板を、コイルずれや巻締まりを防止して巻取るとともに、印刷版に適用した場合の平坦性に係る不良発生率を大幅に低減させることができる。
【0013】
(2)また、前記課題を解決するための本発明に係る印刷版支持体用アルミニウム板の巻取制御装置は、印刷版支持体用アルミニウム板を巻出コイルおよび巻取コイルの間において巻取張力調整手段を介して巻き取るための印刷版支持体用アルミニウム板の巻取制御装置であって、前記巻取コイルの巻取張力を設定する巻取張力設定部と、前記印刷版支持体用アルミニウム板の巻取張力を計測する巻取張力計測部と、この巻取張力計測部で計測された巻取張力が、前記巻取張力設定部により設定された巻取張力になるように、前記巻取張力を可変または一定に低減させるように前記巻取張力調整手段を駆動させる巻取張力駆動部とを備えるように構成される。
【0014】
このように構成すれば、巻取張力設定部により巻取コイルでの印刷版支持体用アルミニウム板の巻取張力を、巻取開始時において所定の値に設定し、所定の巻取長さを巻取コイルが巻き取った後(所定時間経過した後)に、再び巻取張力設定部により巻取張力の値を所定の値より小さくなるように、巻取張力調整手段を介して連続的あるいは段階的に低減させる。そして、巻取張力が目標となる値になったときには、その巻取張力を保持した状態で印刷版支持体用アルミニウム板を巻取コイルに巻き取る。そのため、比較的大きなクラウン率を有する印刷版支持体用アルミニウム板を、コイルずれや巻締まりを防止して巻取ることができ、印刷版に適用した場合の平坦性に係る不良発生率を大幅に低減させることができる。
【0015】
(3)更に、本発明は、印刷版支持体用アルミニウム板の巻取張力を制御しながら巻取る際に用いられるコンピュータを、以下の各手段により機能させる印刷版支持体用アルミニウム板の巻取プログラムとした。すなわち、各手段は、前記印刷版支持体用アルミニウム板の巻取開始時の前記巻取張力において巻取コイルに巻きつけるためにその巻取張力を第1段階に設定する第1設定手段、前記印刷版支持体用アルミニウム板の巻取開始後に、前記第1段階の巻取張力を順次低減させて前記巻取コイルに巻きつけるためにその巻取張力を第2段階に設定する第2設定手段、前記印刷版支持体用アルミニウム板の巻取張力が、予め決められた設定範囲内に到達した後、その設定範囲内の巻取張力を第3段階として一定に設定する第3設定手段、である。
【0016】
このように構成すれば、前記印刷版支持体用アルミニウム板の巻取制御装置の設定をコンピュータで制御するプログラムにより、比較的大きなクラウン率を有する印刷版支持体用アルミニウム板であっても、効率的に巻取ることが可能となる。なお、予め決められた設定範囲内とは、第2段階の設定値の範囲であることが望ましい。
【0017】
(4)そして、本発明は、前記印刷版支持体用アルミニウム板の巻取プログラムで、巻取開始時の巻取張力の第1段階の設定を7.5〜15MPaとし、巻取張力の第2段階の設定を0.25〜2.45MPa/1000mで順次低減させて3〜12MPaとし、巻取張力の第3段階を3〜12MPaとすることが望ましい。
【0018】
このように構成すれば、前記印刷版支持体用アルミニウム板の巻取プログラムで巻取張力の設定を最適化することができるので、比較的大きなクラウン率を有する印刷版支持体用アルミニウム板であっても、コイルずれや巻締まりを防止して効率的に巻取ることができ、印刷版に適用した場合の平坦性に係る不良発生率を大幅に低減し、印刷版支持体用アルミニウム板の生産性を向上させることができる。
【0019】
【発明の実施の形態】
以下、本発明の実施の形態について詳細に説明する。
本発明に係る印刷版支持体用アルミニウム板は、アルミニウムまたはアルミニウム合金を溶解して鋳造し、鋳塊を得た後、均質化熱処理を施し、続いて熱間圧延及び冷間圧延を行う方法によって得られ、前記溶解を行う際に、前記アルミニウムまたはアルミニウム合金に各種元素を適宜添加することで、所望の特性(機械的強度、硬度、耐食性等)が付与される。また、前記鋳塊を圧延する際に圧延条件等を適宜変更することで、板厚、強度等を変更することが可能である。以下、本発明で数値限定した理由について説明する。
【0020】
(巻取開始時の巻取張力:7.5〜15MPa)
印刷版支持体用アルミニウム板の巻取開始時の巻取張力が7.5MPa未満の場合、スプールがずれたり、場合によってはスプールが抜けたりすることになる。
また、印刷版支持体用アルミニウム板の巻取張力が15MPaを超えると、平坦性が悪化したり、段マークが大きくなったりする。
このため、巻取開始時の巻取張力は、7.5〜15MPaとする。
【0021】
(巻取張力の制御:巻取開始後、0.25〜2.45MPa/1000mで低減、3〜12MPaとなった後、この巻取張力で巻取る)
比較的大きなクラウン率を有する印刷版支持体用アルミニウム板では、巻取開始時の巻取張力(以下、「巻取張力初期値」という)のままで巻き取った場合、印刷版に適用される際に平坦度不良発生率(平坦性悪化)が大幅に増加する。
また、前記巻取張力を0.25MPa/1000m未満として巻取った場合、コイルずれや巻締まりが発生し易くなる。
【0022】
このため、本発明にあっては、前記巻取張力初期値を0.25〜2.45MPa/1000m(以下、「巻取張力低減割合の範囲」という)で順次低減させながら巻取り、最終的にこの巻取張力を前記巻取開始時の巻取張力7.5〜15MPaの40〜80%である3〜12MPaとした後、この巻取張力の範囲において巻取ることを必要とする。
【0023】
なお、印刷版支持体用アルミニウム板の巻取制御方法における前記巻取張力は、前記印刷版支持体用アルミニウム板の単位長さ(1000m)当り、単位面積(1mm)当りの荷重(単位;N)で連続的に制御される。本発明で「連続的」とは、前記巻取張力が巻取られるアルミニウム板の長さとともに連続的に変化するものである。或いは、図1に示すように、前記巻取張力の設定が所要の数値幅で段階的に変更されるものであっても良く、この段階の幅を任意に設定することができる。すなわち、前記巻取張力初期値の設定を連続的に低減させる際の段階幅を、必要に応じて本発明で規制する巻取張力低減割合の範囲内で一定とすること、あるいは、規制する巻取張力低減割合の範囲内で適宜変化させることができる。
【0024】
そして、印刷版支持体用アルミニウム板の巻取開始時の巻取張力を低減させる際の巻取速度については特に限定するものではなく、本発明の効果を奏する限りにおいて適宜変更することが可能である。
また、ここでいう比較的大きなクラウン率とは、0.3〜1.5%(例えば、1.0%程度)である。つまり、印刷版支持体用アルミニウム板のクラウン率が、0.3%未満であると、印刷版支持体用アルミニウム板としての平坦性に優れることから、巻取り調整する条件が緩やかとなる。また、印刷版支持体用アルミニウム板のクラウン率が、1.5%を超えると印刷版支持体用アルミニウム板としての製品性が問われる可能性がある。
【0025】
図1は、本発明に係る印刷版支持体用アルミニウム板の巻取制御方法で、前記巻取開始時の張力である7.5〜15MPaから、その40〜80%である3〜12MPa(図1では巻取終了時の巻取張力と表示)まで連続的に低減させる際の巻取長さと巻取張力との関係を模式的に示すグラフであって、横軸は巻取長さを示し、縦軸は巻取張力が低減される割合を示す。
【0026】
図1に示すように、巻取開始時の巻取張力を連続的に低減させる方法は、巻取張力初期値の設定を連続的に低減させる際の段階幅を、(A)のように本発明で規制する巻取張力低減割合の範囲内で一定とする、あるいは(B)のように規制する巻取張力低減割合の範囲内で適宜変化させることができる。このようにして前記巻取開始時の巻取張力を連続的に低減させる方法は、つぎのような印刷版支持体用アルミニウム板の巻取制御装置を用いて行うことができる。
なお、図1において、巻取張力低減割合を段階的に行なう場合のほかに、仮想線で示すように、連続的に巻取張力が低減する場合(即ち、図1の2点鎖線で示す直線あるいは曲線)として行うようにしても構わない。また、設定値到達後では、巻取張力は一定となるように設定される。
【0027】
(印刷版支持体用アルミニウム板の巻取制御装置)
図2は以上説明した本発明に係る印刷版支持体用アルミニウム板の巻取制御方法の一例を実現するための巻取制御装置1の構成を模式的に示すブロック図である。この巻取制御装置1は、巻取コイル7に巻出コイル6から送り出した印刷版支持体用アルミニウム板10の巻取張力を設定する巻取張力設定部2と、巻取張力計測部9と、板厚測定部3と、通板速度測定部4と、巻取コイル回転速度測定部5と、巻取コイル回転速度制御部8と、巻取張力駆動部12とを備えている。
【0028】
なお、この巻取制御装置1では、印刷板支持体用アルミニウム板10の巻取コイル7に巻き取られる巻取張力を、印刷板支持体用アルミニウム板10と、巻取コイル7の巻取速度(回転速度)の関係を調整(巻取張力調整手段)することで、制御するものであり、ここでは、巻取コイル7の回転速度を制御することで、巻取張力を調整するようにしている。なお、巻取張力を調整する他の構成として通板速度を調整することや、また、デフロール11の負荷荷重を調整することで行なっても構わない。
【0029】
さらに、図2に示す、巻取張力計測部9には、板厚測定部3により測定された板厚の数値と、通板速度測定部4により測定された通板速度の数値と、巻取コイル回転速度測定部5からの巻取回転速度の数値と、デフロール11と巻取コイル7に巻き取られる印刷版支持体用アルミニウム板10の傾斜角度θ1〜θ2の数値、板幅の数値、巻取コイル7の巻取軸径7aの数値、デフロール11の付加荷重の数値などが入力されるものである。これらの各数値から、巻取コイル7に巻き取られる巻取張力を演算している。なお、巻取張力の値はトルクの値に置き換えて使用しても構わない。
【0030】
さらに、巻取張力駆動部12は、巻取張力計測部9の計測した各数値に基づいて、巻出コイル6の回転軸を回転させて回転速度(印刷板支持体用アルミニウム板の通板速度)を調整するための駆動を行なうとともに、デフローラ11の負荷荷重を調整するための駆動を行い、かつ、巻取コイル回転速度制御部8を駆動させるためのものである。
【0031】
この巻取制御装置1では、はじめに、巻取コイル7の巻取張力を、巻取張力設定部2により7.5〜15MPaとし、さらに、その40〜80%である3〜12MPaまで、図1に示す(A)または(B)のように連続的に低減させ、その後、3〜12MPaを維持した状態として設定している。
【0032】
なお、巻取制御装置1では、巻取張力制御部2と、巻取張力計測部9と、板厚測定部3と、通板速度測定部4と、巻取コイル回転速度測定部5、巻取張力駆動部12、デフロール11、および、巻取コイル回転速度制御部8とは、当該分野で従来公知の各種の信号伝送用ケーブル、または光ファイバを用いて相互の間のデータ通信が可能なように構成されている。
【0033】
そして、印刷版支持体用アルミニウム板の巻取制御方法で用いられる巻取制御装置1は、巻取張力設定部2で印刷版支持体用アルミニウム板の巻取開始時の巻取張力が7.5〜15MPaに設定されてこの巻取が開始されると、この印刷版支持体用アルミニウム板10の巻取張力が巻取張力計測部9で、実時間で測定される。この巻取張力計測部9で行われる巻取張力測定の時間間隔(連続時間も可)は適宜設定することができる。このようにして巻取張力計測部9で、実時間で測定された巻取張力の(数値)データ、及び前記張力測定時の(数値)データは、巻取張力計測部9に順次伝送される。
【0034】
この巻取張力計測部9は、このように伝送された前記巻取張力のデータと前記張力測定の時間間隔のデータなどとを用いて演算を行い、この巻取張力の低減割合、つまり、巻取コイル回転速度制御部8がどれだけの回転速度になればよいかを算出して、巻取張力駆動部12を介して巻取コイル回転速度制御部8に制御信号を送出している。ここでは、7.5〜15MPaから0.25〜2.45MPa/1000mで順次低減させ、巻取開始時の巻取張力の40〜80%である3〜12MPaとし、その3〜12MPaを一定として巻取コイル7に印刷版支持体用アルミニウム板10を巻き取っている。
【0035】
巻取コイル回転速度制御部8は、巻取張力駆動部12からの信号により、巻取コイル7の回転速度を所定の数値になるように巻取コイル7の回転軸を駆動制御することで、印刷板支持体用アルミニウム板10の通板速度との関係で、巻取張力を制御するように調整している(通板速度が巻取速度より速ければ、巻取張力は低減し、また、通板速度が巻取速度より遅ければ、巻取張力は増加する)。
【0036】
なお、印刷版支持体用アルミニウム板の巻取制御装置1に含まれる巻取コイル7の駆動装置(図示せず)、及び巻出コイル6(図示せず)の駆動装置(図示せず)などは、当該分野で従来公知の通常のものを適用することができ、また、巻取張力計測部9に含まれる演算手段は当該分野で従来公知の演算装置を適用することができる。
【0037】
(本発明に係る巻取制御装置を機能させる巻取制御プログラム)
以上のような印刷版支持体用アルミニウム板の巻取制御装置1は、印刷版支持体用アルミニウム板10の巻取開始時の前記巻取張力を7.5〜15MPaに設定する手段(第1段階に設定する第1設定手段)と、印刷版支持体用アルミニウム板10の巻取開始後にこの巻取開始時の巻取張力を0.25〜2.45MPa/1000mで順次低減させて3〜12MPaとする手段(第2段階に設定する第2設定手段)と、前記印刷版支持体用アルミニウム板の巻取張力が3〜12MPaに到達した後、その巻取張力を一定に設定する手段(第3段階に設定する第3設定手段)と、を順次機能させるプログラムを用いて実行することができる。
【0038】
図4は、本発明を順次機能させるプログラム過程を示すフローチャートである。図4に示すように、このプログラムは、まず、印刷版支持体用アルミニウム板(アルミニウム板)の巻取開始時の巻取張力初期値,巻取開始後の巻取速度、巻取張力減少値、及び巻取張力目標値(その他、板厚の数値、通板速度の数値、巻取回転速度の数値、板幅の数値、巻取コイル7の巻取軸径7aの数値、デフロール11の付加荷重の数値)などを設定し(ステップS1)、この設定でアルミニウム板の巻取りを開始する(ステップS2)。
【0039】
なお、前記巻取張力目標値とは、ここでは、「アルミニウム板の巻取張力を巻取開始後、所定割合で順次低減させて巻取目標値である3〜12MPaに到達した後、一定とする巻取張力」を意味する。なお、終了時の巻取張力は、開始時の巻取張力の40〜80%となるように「%」で設定しても構わない。
【0040】
その後、アルミニウム板の巻取張力を予め設定した減少割合で順次低減させ(ステップS3)ながら、適宜時間間隔でアルミニウム板の巻取開始後の巻取張力を計測し(ステップS4)、アルミニウム板の巻取張力が予め設定した前記巻取張力目標値に到達したか否かについての判断(ステップS5)を、適宜時間間隔で行う。そして、アルミニウム板の巻取張力が予め設定した前記巻取張力目標値の巻取張力に到達した(YES)と判断された場合には、アルミニウム板の巻取が終了するまで、アルミニウム板の巻取張力を前記巻取張力目標値の巻取張力に一定に保持させて巻取りを続行する(ステップS6)。
【0041】
一方、アルミニウム板の巻取張力が予め設定した前記巻取張力目標値の巻取張力に到達していない(NO)と判断された場合には、アルミニウム板の巻取張力が予め設定した前記巻取張力目標値の巻取張力に到達した(YES)と判断されるまで、アルミニウム板の巻取張力を予め設定した減少割合で順次低減させ(ステップS3)、適宜時間間隔でアルミニウム板の巻取張力を計測して(ステップS4)前記判断を行うという過程を繰り返すことを行なう。
【0042】
図4に示すように、あらかじめ、印刷版支持体用アルミニウム板の巻取制御プログラムとして設定されることで、印刷版支持体用アルミニウム板10の巻取り状態を適正に設定することが可能となる。なお、この印刷版支持体用アルミニウム板の巻取制御プログラムでは、印刷版支持体用アルミニウム板の板厚、板幅などのデータの入力を、作業者が入力テーブルを介して直接入力しても構わない。
【0043】
【実施例】
以下に本発明に係る実施例を用いて本発明を具体的に説明する。
JIS H 4000で規定されている純Al系の1050よりなる印刷版支持体用アルミニウム板(W形クラウンを有するもの)を作製し、表1に示す条件にて直径が550mmのスプールに巻取った。
【0044】
その後、トラック等の輸送手段で輸送した際のコイルずれ(コイルずれのなかったものを○、あったものを×とする)、コイルを巻きほぐした場合の巻締まり(巻締まりの発生しなかったものを「○」、巻締まりの発生したものを「×」とする)、及び印刷版に適用した場合の平坦度不良発生率(%)について評価した。その結果を表2に示す。
【0045】
【表1】

Figure 2004298947
【0046】
【表2】
Figure 2004298947
【0047】
本発明で規制した条件を満足しない比較例(No.8〜13)では、コイルずれや巻締まりの発生がみら、あるいは、印刷版に適用した場合の平坦度不良発生率が70%を超えて平坦性が悪化している。
【0048】
すなわち、比較例No.8では印刷版に適用した場合に平坦度不良発生率が80%となっている。比較例No.9ではコイルずれが発生しているとともにスプールずれが発生している。比較例No.10では平坦度不良発生率が85%となっている。比較例No.11は巻締まりが発生しているとともに平坦度不良発生率が80%となっている。また、比較例No.12ではコイルずれ及び巻締まりが発生し、平坦度不良発生率が75%となっているとともに、共ずれが発生している。更に、比較例No.13では巻締まりが発生しているとともに、平坦度不良発生率が80%となっている。
【0049】
一方、本発明で規制した条件を満足している本発明に係る実施例(No.1〜7)では、いずれもコイルずれや巻締まりの発生がみられず、かつ、印刷版に適用した場合の平坦度不良発生率がいずれも0%であって平坦性にも優れており、印刷版支持体用アルミニウム板としての品質が良好なものであった。
なお、本実施例ではW形クラウンを有するアルミニウム板を印刷版に適用した場合について説明したが、本発明では、この他に部分的に凹部分または凸部分の形状のクラウンを有するアルミニウム板を印刷版に適用した場合にも、前記の効果と同様の効果が得られる。
【0050】
【発明の効果】
以上説明した通りに構成される本発明によれば以下の効果を奏する。
すなわち、本発明に係る印刷版支持体用アルミニウム板の巻取制御方法及びその制御装置並びにその巻取制御プログラムによれば、印刷版支持体用アルミニウム板の巻取張力を適切に制御することにより、比較的大きなクラウン率を有する印刷版支持体用アルミニウム板を、コイルずれや巻締まりを防止して巻取るとともに、印刷版に適用した場合の平坦性に係る不良発生率を大幅に低減させることが可能になる。
【0051】
また、印刷版支持体用アルミニウム板の巻取制御装置によれば、巻取張力設定部により巻取コイルでの印刷版支持体用アルミニウム板の巻取張力を、巻取開始時において所定の値に設定し、所定の巻取長さを巻取コイルが巻き取った後に、連続的あるいは段階的に低減させ、巻取張力が目標となる値になったときに、その巻取張力を保持した状態で印刷版支持体用アルミニウム板を巻取コイルに巻き取る。そのため、比較的大きなクラウン率を有する印刷版支持体用アルミニウム板(アルミニウム板またはアルミニウム合金板)を適切に巻き取ることができる。
【0052】
更に、印刷版支持体用アルミニウム板の巻取制御プログラムによれば、既存の巻取制御装置に適用して、前記印刷版支持体用アルミニウム板を適切に巻き取ることが可能になる。
【図面の簡単な説明】
【図1】本発明に係る印刷版支持体用アルミニウム板の巻取制御方法で、前記巻取開始時の巻取張力を連続的に低減させる際の巻取長さと巻取張力との関係を模式的に示すグラフである。
【図2】本発明に係る印刷版支持体用アルミニウム板の巻取制御方法で用いられる巻取制御装置の構成を模式的に示すブロック図である。
【図3】(a)、(b)、(c)は、通常のアルミニウム板が有するクラウン形状の一例及びクラウン率を模式的に示す断面図である。
【図4】本発明に係る印刷版支持体用アルミニウム板の巻取制御プログラムを順次機能させるプログラム過程を示すフローチャートである。
【符号の説明】
1 印刷版支持体用アルミニウム板の巻取制御装置
2 巻取張力設定部
3 板厚測定部
4 通板速度測定部
5 巻取コイル回転速度測定部
6 巻出コイル
7 巻取コイル
7a 巻取軸径
8 巻取コイル回転速度制御部(巻取張力調整手段)
9 巻取張力計測部
10 印刷版支持体用アルミニウム板
11 デフロール
12 巻取張力駆動部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for controlling winding of an aluminum plate for a printing plate support capable of winding a rolled aluminum plate for a printing plate support into a coil in an appropriate state, a winding control device thereof, and a winding control thereof. About the program.
[0002]
[Prior art]
In general, a printing plate support is made of pure Al-based 1050 aluminum or Al-Mn-based 3003 aluminum alloy or the like specified in JIS H 4000, and has a thickness of about 0.1 to 0.3 mm. Alternatively, an aluminum alloy plate (hereinafter, these are collectively referred to as “aluminum plate” as appropriate) is applied.
[0003]
The aluminum plate applied to the printing plate support is manufactured through the same processes as those of other conventionally known various aluminum plates and aluminum alloy plates. That is, the pure Al-based 1050 aluminum or Al-Mn-based 3003 aluminum alloy is melted and cast to obtain an ingot, which is then subjected to a homogenizing heat treatment, and the ingot is further rolled. To an aluminum plate for a printing plate support having a desired plate thickness.
[0004]
Thereafter, the aluminum plate is subjected to correction of internal stress or the like using a tension leveler or the like to obtain an aluminum plate for a printing plate support having flatness required for printing. Usually, this aluminum plate for a printing plate support is wound up for easy handling, formed into a coil, and transported to a surface treatment step of the aluminum plate for a printing plate support.
[0005]
When winding the aluminum plate for a printing plate support to produce a coil, the coil is not shifted during transportation of the coil by a transportation means such as a truck, or the coil is formed in the surface treatment step. When the coil is unwound, a constant take-up tension is applied to the aluminum plate for a printing plate support so that the coil is not tightened.
[0006]
FIGS. 3A, 3B, and 3C are schematic diagrams showing an example of a crown shape and a crown ratio of a general aluminum plate. 3A, 3B, and 3C, the horizontal axis is the plate width direction, the vertical axis is the crown ratio height, h represents the height of the crown, and w represents the width of the crown. Represent. The crown shape of the aluminum plate has a W shape as shown in FIG. 3 (a), a shape having a partially concave portion as shown in FIG. 3 (b), and a portion as shown in FIG. 3 (c). Are roughly divided into shapes having convex portions. Such a size of the crown is usually estimated from a crown ratio which is a ratio of the height of the crown to the thickness of the aluminum plate. Then, the crown ratio is calculated using an equation of crown ratio (%) = (h / H) × 100 (H is a plate thickness).
[0007]
According to the findings of the present inventors, when the crown ratio of an aluminum plate is increased to a certain extent, an aluminum plate having the same specification as that having a small crown ratio (the same specification, having the same characteristics other than the crown ratio) is used. Even if the winding is performed at the same winding tension, the above-described coil displacement or coil tightening may occur. When an aluminum plate having such a large crown ratio is applied to the printing plate support, the flatness of the surface is impaired, and the defect occurrence rate when the printing plate support aluminum plate is applied to the printing plate is reduced. (Flatness defect occurrence rate) tended to increase significantly. Therefore, for example, a measure has been proposed in which an aluminum plate is manufactured so that the crown ratio is equal to or less than a certain value, and the aluminum plate is applied to a printing plate support (for example, see Patent Document 1).
[0008]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 09-202063 (all pages)
[0009]
[Problems to be solved by the invention]
However, in this case, it is necessary to improve the performance of the rolling mill for rolling the aluminum plate in order to suppress the crown ratio to a certain value or less, and as a result, the productivity of the aluminum plate is reduced, and as a result, the cost is reduced. May increase.
[0010]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a crown which is rolled using a conventional rolling mill having ordinary performance and has a size that does not particularly affect printing performance. Printing plate support aluminum plate coil having a high degree of restraint, while suppressing coil misalignment when transporting the coil, suppressing winding tightness when unwinding the coil, and also having excellent flatness An object of the present invention is to provide a winding control method, a winding control device, and a winding control program for a printing plate support aluminum plate capable of realizing and enhancing the productivity of a body aluminum plate.
[0011]
[Means for Solving the Problems]
(1) A method for controlling the winding of an aluminum plate for a printing plate support (aluminum plate or aluminum alloy plate) according to the present invention for solving the above-described problems, controls the winding tension of the aluminum plate for a printing plate support. A method for controlling the winding of an aluminum plate for a printing plate support, comprising a step of winding the aluminum plate for a printing plate support onto a winding coil. The winding tension is set to 7.5 to 15 MPa to start winding, and thereafter, the winding tension at the start of the winding is sequentially reduced to 0.25 to 2.45 MPa / 1000 m to 3 to 12 MPa. Then, the aluminum plate for a printing plate support is wound around a winding coil while the winding tension of 3 to 12 MPa is kept constant.
[0012]
With this configuration, since the winding is performed while appropriately controlling the winding tension of the printing plate support aluminum plate, the printing plate support aluminum plate having a relatively large crown ratio (for example, about 1%) can be obtained. In addition, it is possible to prevent the coil from being displaced and tightly wound, and to significantly reduce the occurrence rate of defects relating to flatness when applied to a printing plate.
[0013]
(2) A winding control device for an aluminum plate for a printing plate support according to the present invention for solving the above-mentioned problems, comprising winding the aluminum plate for a printing plate support between an unwinding coil and a winding coil. What is claimed is: 1. A winding control device for an aluminum plate for a printing plate support for winding via a tension adjusting means, comprising: a winding tension setting unit for setting a winding tension of the winding coil; A winding tension measuring unit that measures the winding tension of the aluminum plate, and the winding tension measured by the winding tension measuring unit is the winding tension set by the winding tension setting unit. A winding tension driving unit that drives the winding tension adjusting means so as to reduce or variably reduce the winding tension.
[0014]
With this configuration, the winding tension of the printing plate support aluminum plate at the winding coil is set to a predetermined value at the start of winding by the winding tension setting unit, and the predetermined winding length is set. After the winding coil has been wound (after a lapse of a predetermined time), the winding tension setting unit continuously or via the winding tension adjusting means so that the value of the winding tension becomes smaller than the predetermined value. Decrease step by step. When the winding tension reaches a target value, the printing plate support aluminum plate is wound around a winding coil while maintaining the winding tension. Therefore, the aluminum plate for a printing plate support having a relatively large crown ratio can be wound up while preventing coil displacement and tight tightening, and the occurrence rate of defects relating to flatness when applied to a printing plate is greatly reduced. Can be reduced.
[0015]
(3) Furthermore, the present invention provides a computer for use in winding while controlling the winding tension of the aluminum plate for a printing plate support by the following means for winding the aluminum plate for a printing plate support. Program. That is, each means is a first setting means for setting the winding tension to a first stage in order to wind the winding plate around the winding coil at the winding tension at the start of winding of the printing plate support aluminum plate, A second setting means for setting the winding tension to a second stage in order to sequentially reduce the winding tension in the first stage and wind the winding coil around the winding coil after starting winding of the aluminum plate for a printing plate support; After the winding tension of the aluminum plate for a printing plate support has reached a predetermined setting range, a third setting means for setting the winding tension within the setting range constant as a third step. is there.
[0016]
According to this structure, even if the printing plate support aluminum plate has a relatively large crown ratio, the efficiency can be improved even if the printing plate support aluminum plate has a relatively large crown ratio by a program for controlling the setting of the printing plate support aluminum plate winding control device by a computer. It becomes possible to wind up. It should be noted that it is preferable that the predetermined set range is the range of the set value in the second stage.
[0017]
(4) In the present invention, in the winding program for an aluminum plate for a printing plate support, the first stage setting of the winding tension at the start of winding is set to 7.5 to 15 MPa, It is desirable that the setting of the two stages is sequentially reduced at 0.25 to 2.45 MPa / 1000 m to 3 to 12 MPa, and the third stage of the winding tension is 3 to 12 MPa.
[0018]
According to this structure, the setting of the winding tension can be optimized by the winding program for the printing plate support aluminum plate, so that the printing plate support aluminum plate having a relatively large crown ratio can be obtained. Even if it is applied to a printing plate, it can be wound efficiently by preventing coil misalignment and tightness, greatly reducing the incidence of flatness defects when applied to a printing plate, and producing an aluminum plate for a printing plate support. Performance can be improved.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail.
The aluminum plate for a printing plate support according to the present invention is prepared by melting and casting aluminum or an aluminum alloy, obtaining an ingot, performing a homogenizing heat treatment, and then performing hot rolling and cold rolling. The obtained properties are obtained by appropriately adding various elements to the aluminum or aluminum alloy during the dissolution, whereby desired properties (mechanical strength, hardness, corrosion resistance, etc.) are imparted. In addition, by appropriately changing the rolling conditions and the like when rolling the ingot, it is possible to change the thickness, strength, and the like. Hereinafter, the reason why the numerical value is limited in the present invention will be described.
[0020]
(Rewind tension at the start of rewind: 7.5 to 15 MPa)
If the winding tension of the printing plate support aluminum plate at the start of winding is less than 7.5 MPa, the spool may be displaced or the spool may come off in some cases.
Further, when the winding tension of the aluminum plate for a printing plate support exceeds 15 MPa, the flatness is deteriorated and the step mark becomes large.
For this reason, the winding tension at the start of winding is set to 7.5 to 15 MPa.
[0021]
(Control of winding tension: after starting winding, decrease by 0.25 to 2.45 MPa / 1000 m, and after winding to 3 to 12 MPa, winding is performed with this winding tension)
In the case of an aluminum plate for a printing plate support having a relatively large crown ratio, when the film is wound with the winding tension at the start of winding (hereinafter referred to as “winding tension initial value”), it is applied to the printing plate. In this case, the flatness defect occurrence rate (flatness deterioration) is greatly increased.
In addition, when the winding is performed with the winding tension being less than 0.25 MPa / 1000 m, coil misalignment and tight tightening are likely to occur.
[0022]
For this reason, in the present invention, winding is performed while sequentially reducing the winding tension initial value by 0.25 to 2.45 MPa / 1000 m (hereinafter referred to as “range of reduction ratio of winding tension”). After the winding tension is set to 3 to 12 MPa, which is 40 to 80% of the winding tension at the start of the winding, 7.5 to 15 MPa, it is necessary to perform winding in the range of the winding tension.
[0023]
The winding tension in the method for controlling the winding of an aluminum plate for a printing plate support is defined as a unit area (1 mm) per unit length (1000 m) of the aluminum plate for a printing plate support. 2 ) Is continuously controlled by a load (unit: N). In the present invention, "continuous" means that the winding tension changes continuously with the length of the aluminum plate to be wound. Alternatively, as shown in FIG. 1, the setting of the winding tension may be changed stepwise with a required numerical width, and the width at this stage can be arbitrarily set. That is, the step width at the time of continuously reducing the setting of the winding tension initial value is set to be constant within the range of the winding tension reduction ratio regulated by the present invention as required, or the winding width to be regulated is controlled. It can be changed appropriately within the range of the take-up tension reduction ratio.
[0024]
The winding speed at the time of reducing the winding tension at the start of winding of the printing plate support aluminum plate is not particularly limited, and can be appropriately changed as long as the effects of the present invention are achieved. is there.
Further, the relatively large crown ratio here is 0.3 to 1.5% (for example, about 1.0%). In other words, when the crown ratio of the aluminum plate for a printing plate support is less than 0.3%, the flatness of the aluminum plate for a printing plate support is excellent, so that the winding adjustment conditions are moderate. Further, when the crown ratio of the aluminum plate for a printing plate support exceeds 1.5%, there is a possibility that the productivity of the aluminum plate for a printing plate support may be questioned.
[0025]
FIG. 1 shows a method for controlling the winding of an aluminum plate for a printing plate support according to the present invention, wherein the tension at the start of winding is 7.5 to 15 MPa, which is 40 to 80% of 3 to 12 MPa (FIG. 1 is a graph schematically showing the relationship between the winding length and the winding tension when continuously reducing the winding length to the value at the end of winding (indicated as winding tension at the end of winding). The horizontal axis indicates the winding length. The vertical axis indicates the rate at which the winding tension is reduced.
[0026]
As shown in FIG. 1, in the method of continuously reducing the winding tension at the start of winding, the step width at the time of continuously reducing the initial setting of the winding tension is set as shown in FIG. It can be kept constant within the range of the winding tension reduction ratio regulated by the invention, or can be appropriately changed within the range of the winding tension reduction ratio regulated as shown in FIG. The method of continuously reducing the winding tension at the start of winding as described above can be performed by using the following winding control device for an aluminum plate for a printing plate support.
In FIG. 1, in addition to the case where the winding tension reduction ratio is performed stepwise, as shown by a virtual line, the case where the winding tension is continuously reduced (that is, a straight line indicated by a two-dot chain line in FIG. 1). Alternatively, it may be performed as a curve. After reaching the set value, the winding tension is set to be constant.
[0027]
(Rewinding control device for aluminum plate for printing plate support)
FIG. 2 is a block diagram schematically showing the configuration of the winding control device 1 for realizing an example of the above-described method of controlling the winding of the aluminum plate for a printing plate support according to the present invention. The winding control device 1 includes a winding tension setting unit 2 that sets a winding tension of the printing plate support aluminum plate 10 sent from the unwinding coil 6 to the winding coil 7, a winding tension measuring unit 9, , A sheet thickness measuring unit 3, a sheet passing speed measuring unit 4, a winding coil rotation speed measuring unit 5, a winding coil rotation speed control unit 8, and a winding tension driving unit 12.
[0028]
In the winding control device 1, the winding tension wound by the winding coil 7 of the printing plate support aluminum plate 10 is controlled by the winding speed of the printing plate support aluminum plate 10 and the winding speed of the winding coil 7. By controlling the relationship of (rotation speed) (winding tension adjusting means), control is performed. Here, by controlling the rotation speed of the winding coil 7, the winding tension is adjusted. I have. In addition, as another structure for adjusting the winding tension, the winding speed may be adjusted, or the load applied to the deflor 11 may be adjusted.
[0029]
Further, in the winding tension measuring unit 9 shown in FIG. 2, the numerical value of the sheet thickness measured by the sheet thickness measuring unit 3, the numerical value of the sheet passing speed measured by the sheet passing speed measuring unit 4, and the winding Numerical values of the winding rotational speed from the coil rotational speed measuring unit 5, numerical values of the inclination angles θ1 to θ2 of the printing plate support aluminum plate 10 wound around the deflor 11 and the winding coil 7, numerical values of the plate width, The numerical value of the winding shaft diameter 7a of the coil 7 and the numerical value of the additional load of the deflor 11 are input. The winding tension wound by the winding coil 7 is calculated from each of these numerical values. Note that the winding tension value may be used in place of the torque value.
[0030]
Further, the winding tension driving unit 12 rotates the rotating shaft of the unwinding coil 6 based on each numerical value measured by the winding tension measuring unit 9 to rotate the rotating shaft (the passing speed of the aluminum plate for the printing plate support). ) Is performed, the drive for adjusting the load applied to the deflorer 11 is performed, and the winding coil rotation speed controller 8 is driven.
[0031]
In the winding control device 1, first, the winding tension of the winding coil 7 is set to 7.5 to 15 MPa by the winding tension setting unit 2, and further, to 3 to 12 MPa, which is 40 to 80% thereof, as shown in FIG. (A) or (B) as shown in FIG. 3 and then set to a state where 3 to 12 MPa is maintained.
[0032]
In the winding control device 1, the winding tension control unit 2, the winding tension measuring unit 9, the plate thickness measuring unit 3, the passing speed measuring unit 4, the winding coil rotational speed measuring unit 5, The take-up force drive unit 12, the deflore 11, and the winding coil rotation speed control unit 8 can perform data communication between each other using various signal transmission cables or optical fibers conventionally known in the art. It is configured as follows.
[0033]
Then, in the winding control device 1 used in the winding control method for the printing plate support aluminum plate, the winding tension at the start of winding of the printing plate support aluminum plate is set to 7. When the winding is started at 5 to 15 MPa, the winding tension of the printing plate support aluminum plate 10 is measured in real time by the winding tension measuring unit 9. The time interval (continuous time is also possible) of the winding tension measurement performed by the winding tension measuring unit 9 can be set as appropriate. The (numerical) data of the winding tension measured in real time by the winding tension measuring section 9 and the (numerical) data at the time of measuring the tension are sequentially transmitted to the winding tension measuring section 9. .
[0034]
The winding tension measuring unit 9 performs an operation using the data of the winding tension transmitted as described above and data of the time interval of the tension measurement, and calculates a reduction ratio of the winding tension, that is, the winding tension. The take-up coil rotation speed control unit 8 calculates how much the rotation speed should be, and sends a control signal to the take-up coil rotation speed control unit 8 via the take-up tension drive unit 12. Here, it is sequentially reduced from 7.5 to 15 MPa from 0.25 to 2.45 MPa / 1000 m, is set to 3 to 12 MPa which is 40 to 80% of the winding tension at the start of winding, and the 3 to 12 MPa is fixed. The printing plate support aluminum plate 10 is wound around the winding coil 7.
[0035]
The winding coil rotation speed control unit 8 drives and controls the rotation axis of the winding coil 7 based on a signal from the winding tension driving unit 12 so that the rotation speed of the winding coil 7 becomes a predetermined value. The winding tension is adjusted so as to control the winding tension in relation to the passing speed of the printing plate support aluminum plate 10 (if the passing speed is higher than the winding speed, the winding tension is reduced. If the passing speed is lower than the winding speed, the winding tension increases).
[0036]
A driving device (not shown) for the winding coil 7 and a driving device (not shown) for the unwinding coil 6 included in the winding control device 1 for the aluminum plate for a printing plate support are provided. For the device, a conventional device known in the art can be applied, and a computing device included in the winding tension measuring unit 9 can be a computing device known in the art.
[0037]
(Rewinding control program that causes the rewinding control device according to the present invention to function)
The winding control device 1 for an aluminum plate for a printing plate support as described above sets the winding tension at the start of winding of the aluminum plate 10 for a printing plate support to 7.5 to 15 MPa (first unit). (First setting means for setting in stages), and after the winding of the aluminum plate 10 for a printing plate support is started, the winding tension at the start of this winding is sequentially reduced by 0.25 to 2.45 MPa / 1000 m to 3 to Means for setting to 12 MPa (second setting means for setting to the second stage) and means for setting the winding tension to a constant value after the winding tension of the printing plate support aluminum plate reaches 3 to 12 MPa ( And (3rd setting means for setting to the third stage).
[0038]
FIG. 4 is a flowchart showing a program process for sequentially operating the present invention. As shown in FIG. 4, the program firstly includes a winding tension initial value at the start of winding of a printing plate support aluminum plate (aluminum plate), a winding speed after winding is started, and a reduction value of winding tension. , And the target value of the winding tension (in addition, the numerical value of the plate thickness, the numerical value of the passing speed, the numerical value of the winding rotational speed, the numerical value of the plate width, the numerical value of the winding shaft diameter 7a of the winding coil 7, the addition of the deflor 11) The value of the load is set (step S1), and the winding of the aluminum plate is started with this setting (step S2).
[0039]
Here, the winding tension target value is defined as “the winding tension of the aluminum plate is gradually reduced at a predetermined rate after the winding is started and reaches the winding target value of 3 to 12 MPa. Winding tension ". Note that the winding tension at the end may be set to “%” so as to be 40 to 80% of the winding tension at the start.
[0040]
Thereafter, while sequentially reducing the winding tension of the aluminum plate at a preset reduction rate (step S3), the winding tension after the start of winding the aluminum plate is measured at appropriate time intervals (step S4). The determination as to whether or not the winding tension has reached the preset winding tension target value (step S5) is made at appropriate time intervals. When it is determined that the winding tension of the aluminum plate has reached the winding tension target value set in advance (YES), the winding of the aluminum plate is completed until the winding of the aluminum plate is completed. The take-up tension is kept constant at the take-up tension of the take-up tension target value, and the take-up is continued (step S6).
[0041]
On the other hand, when it is determined that the winding tension of the aluminum plate has not reached the winding tension of the preset winding tension target value (NO), the winding tension of the aluminum plate is set to the predetermined winding tension. Until it is determined that the winding tension of the winding tension target value has been reached (YES), the winding tension of the aluminum plate is sequentially reduced at a preset reduction rate (step S3), and the winding of the aluminum plate is performed at appropriate time intervals. The process of measuring the tension (step S4) and making the above determination is repeated.
[0042]
As shown in FIG. 4, the winding state of the printing plate support aluminum plate 10 can be appropriately set by being set in advance as a winding control program for the printing plate support aluminum plate. . In this winding control program for an aluminum plate for a printing plate support, data such as the thickness and width of the aluminum plate for a printing plate support can be input directly by an operator via an input table. I do not care.
[0043]
【Example】
Hereinafter, the present invention will be specifically described with reference to examples according to the present invention.
A printing plate support aluminum plate (having a W-shaped crown) made of pure Al-based 1050 specified in JIS H 4000 was prepared and wound on a spool having a diameter of 550 mm under the conditions shown in Table 1. .
[0044]
Thereafter, coil displacement when transported by a transportation means such as a truck (circle without coil displacement, and x with coil displacement), tightness when unwinding the coil (no tightness occurred) The sample was evaluated as “○”, the one with tight winding was indicated as “X”), and the flatness defect occurrence rate (%) when applied to a printing plate. Table 2 shows the results.
[0045]
[Table 1]
Figure 2004298947
[0046]
[Table 2]
Figure 2004298947
[0047]
In Comparative Examples (Nos. 8 to 13) that do not satisfy the conditions regulated by the present invention, the occurrence of coil misalignment and tight tightening is observed, or the flatness defect occurrence rate when applied to a printing plate exceeds 70%. And the flatness has deteriorated.
[0048]
That is, in Comparative Example No. In No. 8, when applied to a printing plate, the flatness defect occurrence rate is 80%. Comparative Example No. In No. 9, a coil shift and a spool shift have occurred. Comparative Example No. 10, the flatness defect occurrence rate is 85%. Comparative Example No. In No. 11, the tightening of the winding has occurred and the flatness defect occurrence rate is 80%. In Comparative Example No. In No. 12, coil misalignment and tight tightening occurred, the flatness defect occurrence rate was 75%, and co-misalignment occurred. Further, Comparative Example No. In No. 13, winding tightness has occurred and the flatness defect occurrence rate is 80%.
[0049]
On the other hand, in the examples (Nos. 1 to 7) according to the present invention satisfying the conditions regulated by the present invention, in each of the examples, no coil shift or tight tightening was observed, and when applied to a printing plate. The flatness defect occurrence rate of each was 0% and the flatness was excellent, and the quality as an aluminum plate for a printing plate support was good.
In this embodiment, the case where an aluminum plate having a W-shaped crown is applied to the printing plate has been described. However, in the present invention, an aluminum plate having a crown having a partially concave or convex shape is also printed. When applied to a plate, the same effects as those described above can be obtained.
[0050]
【The invention's effect】
According to the present invention configured as described above, the following effects can be obtained.
That is, according to the winding control method and the control device of the printing plate support aluminum plate and the winding control program according to the present invention, by appropriately controlling the winding tension of the printing plate support aluminum plate. In addition to winding up an aluminum plate for a printing plate support having a relatively large crown ratio while preventing coil misalignment and tightness, significantly reducing the occurrence rate of flatness defects when applied to a printing plate. Becomes possible.
[0051]
Further, according to the winding control device for the printing plate support aluminum plate, the winding tension of the printing plate support aluminum plate by the winding coil is set to a predetermined value at the start of winding by the winding tension setting unit. After the winding coil has taken up a predetermined winding length, the winding tension is reduced continuously or stepwise, and when the winding tension reaches a target value, the winding tension is held. In this state, the printing plate support aluminum plate is wound around a winding coil. Therefore, an aluminum plate (aluminum plate or aluminum alloy plate) for a printing plate support having a relatively large crown ratio can be appropriately wound.
[0052]
Further, according to the winding control program for a printing plate support aluminum plate, the printing plate support aluminum plate can be appropriately wound by being applied to an existing winding control device.
[Brief description of the drawings]
FIG. 1 shows a relationship between a winding length and a winding tension when the winding tension at the start of the winding is continuously reduced by the winding control method for an aluminum plate for a printing plate support according to the present invention. It is a graph shown typically.
FIG. 2 is a block diagram schematically showing a configuration of a winding control device used in a method of controlling winding of an aluminum plate for a printing plate support according to the present invention.
FIGS. 3A, 3B, and 3C are cross-sectional views schematically showing an example of a crown shape and a crown ratio of a normal aluminum plate.
FIG. 4 is a flowchart showing a program process for sequentially making the winding control program for the aluminum plate for a printing plate support according to the present invention function.
[Explanation of symbols]
1 Winding control device for aluminum plate for printing plate support
2 Winding tension setting section
3 Thickness measurement section
4 Passing speed measurement unit
5 Winding coil rotation speed measurement unit
6 unwinding coil
7 Winding coil
7a Winding shaft diameter
8 Winding coil rotation speed control unit (winding tension adjusting means)
9 Winding tension measuring unit
10 Aluminum plate for printing plate support
11 Deflor
12 Winding tension drive

Claims (4)

印刷版支持体用アルミニウム板の巻取張力を制御して前記印刷版支持体用アルミニウム板を巻取コイルに巻取る工程を含む印刷版支持体用アルミニウム板の巻取制御方法であって、
前記印刷版支持体用アルミニウム板の巻取開始時の前記巻取張力を7.5〜15MPaに設定して巻取りを開始し、その後、前記巻取開始時の巻取張力を0.25〜2.45MPa/1000mで順次低減させて3〜12MPaとした後、この3〜12MPaの巻取張力を一定として前記印刷版支持体用アルミニウム板を巻取コイルに巻取ることを特徴とする印刷版支持体用アルミニウム板の巻取制御方法。
A method for controlling the winding of an aluminum plate for a printing plate support including a step of winding the aluminum plate for a printing plate support onto a winding coil by controlling the winding tension of the aluminum plate for a printing plate support,
The winding tension at the start of winding of the aluminum plate for a printing plate support is set to 7.5 to 15 MPa to start winding, and thereafter, the winding tension at the start of winding is set to 0.25 to 2. A printing plate, wherein the aluminum plate for a printing plate support is wound around a winding coil while the winding tension of 3 to 12 MPa is kept constant after sequentially reducing the pressure to 3.12 MPa at 2.45 MPa / 1000 m. A method for controlling winding of an aluminum plate for a support.
印刷版支持体用アルミニウム板を巻出コイルおよび巻取コイルの間において巻取張力調整手段を介して巻き取るための印刷版支持体用アルミニウム板の巻取制御装置であって、
前記巻取コイルの巻取張力を設定する巻取張力設定部と、前記印刷版支持体用アルミニウム板の巻取張力を計測する巻取張力計測部と、この巻取張力計測部で計測された巻取張力が、前記巻取張力設定部により設定された巻取張力になるように、前記巻取張力を可変または一定に低減させるように前記巻取張力調整手段を駆動させる巻取張力駆動部とを備えることを特徴とする印刷版支持体用アルミニウム板の巻取制御装置。
A winding control device for a printing plate support aluminum plate for winding the printing plate support aluminum plate between an unwinding coil and a winding coil via a winding tension adjusting means,
A winding tension setting unit that sets the winding tension of the winding coil, a winding tension measurement unit that measures the winding tension of the printing plate support aluminum plate, and a winding tension measurement unit that measures the winding tension. A winding tension driving unit that drives the winding tension adjustment unit so that the winding tension is variable or reduced so that the winding tension is the winding tension set by the winding tension setting unit; A winding control device for an aluminum plate for a printing plate support, comprising:
印刷版支持体用アルミニウム板の巻取張力を制御しながら前記印刷版支持体用アルミニウム板を巻取る際に用いられるコンピュータを、
前記印刷版支持体用アルミニウム板の巻取開始時の前記巻取張力において巻取コイルに巻きつけるためにその巻取張力を第1段階に設定する第1設定手段、
前記印刷版支持体用アルミニウム板の巻取開始後に、前記第1段階の巻取張力を順次低減させて前記巻取コイルに巻きつけるためにその巻取張力を第2段階に設定する第2設定手段、
前記印刷版支持体用アルミニウム板の巻取張力が、予め決められた設定範囲内に到達した後、その設定範囲内の巻取張力を第3段階として一定に設定する第3設定手段、
として機能させることを特徴とする印刷版支持体用アルミニウム板の巻取制御プログラム。
Computer used when winding the printing plate support aluminum plate while controlling the winding tension of the printing plate support aluminum plate,
First setting means for setting the winding tension to a first stage in order to wind the winding plate around the winding coil at the winding tension at the start of winding of the printing plate support aluminum plate;
After the winding of the aluminum plate for the printing plate support is started, a second setting in which the winding tension in the first stage is sequentially reduced and the winding tension is set in a second stage in order to wind the winding plate around the winding coil. means,
After the winding tension of the printing plate support aluminum plate has reached a predetermined setting range, a third setting means for setting the winding tension within the setting range constant as a third step,
A program for controlling the winding of an aluminum plate for a printing plate support, wherein the program is made to function as a computer.
前記巻取開始時の巻取張力の第1段階の設定を7.5〜15MPaとし、
前記巻取張力の第2段階の設定を0.25〜2.45MPa/1000mで順次低減させて3〜12MPaとし、
前記巻取張力の第3段階を3〜12MPaとすることを特徴とする請求項3に記載の印刷版支持体用アルミニウム板の巻取制御プログラム。
The first stage setting of the winding tension at the start of the winding is set to 7.5 to 15 MPa,
The setting of the second stage of the winding tension is sequentially reduced from 0.25 to 2.45 MPa / 1000 m to 3 to 12 MPa,
The program for controlling winding of an aluminum plate for a printing plate support according to claim 3, wherein the third stage of the winding tension is set to 3 to 12 MPa.
JP2003097281A 2003-03-31 2003-03-31 Coiling control method for aluminum sheet for printing plate supporter, coiling control apparatus thereof and coiling control program thereof Pending JP2004298947A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2095889A1 (en) 2008-02-29 2009-09-02 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Method for producing aluminum strip excellent in degree of flatness
JP2015168488A (en) * 2014-03-04 2015-09-28 ブラザー工業株式会社 Printing device
US9177695B2 (en) 2006-10-24 2015-11-03 Auto Kabel Managementgesellschaft Mbh Battery lead

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9177695B2 (en) 2006-10-24 2015-11-03 Auto Kabel Managementgesellschaft Mbh Battery lead
EP2095889A1 (en) 2008-02-29 2009-09-02 Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) Method for producing aluminum strip excellent in degree of flatness
JP2015168488A (en) * 2014-03-04 2015-09-28 ブラザー工業株式会社 Printing device

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