JP2715346B2 - Electrolytic treatment of aluminum support for printing plate - Google Patents
Electrolytic treatment of aluminum support for printing plateInfo
- Publication number
- JP2715346B2 JP2715346B2 JP8903991A JP8903991A JP2715346B2 JP 2715346 B2 JP2715346 B2 JP 2715346B2 JP 8903991 A JP8903991 A JP 8903991A JP 8903991 A JP8903991 A JP 8903991A JP 2715346 B2 JP2715346 B2 JP 2715346B2
- Authority
- JP
- Japan
- Prior art keywords
- electrolytic
- current
- waveform
- electrolytic treatment
- aluminum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Printing Plates And Materials Therefor (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、金属板に電解粗面化処
理を行う際、電解反応を最適に制御しうる印刷版用アル
ミニウム支持体の電解処理方法に関するものである。The present invention relates, when performing electrolytic surface roughening treatment on the metal plate, it relates to an electrolytic treatment method for optimally controlling the Hare Ru printing plate aluminum support for the electrolytic reaction.
【０００２】[0002]
【従来の技術】印刷版用アルミニウム支持体、特にオフ
セット印刷版用支持体としてはアルミニウム板（アルミ
ニウム合金板を含む）が用いられている。一般にアルミ
ニウム板をオフセット印刷版用支持体として使用するた
めには、感光材との適度な接着性と保水性を有している
ことが必要である。このためにはアルミニウム板の表面
を均一かつ緻密な砂目を有するように粗面化しなければ
ならない。この粗面化処理は製版後実際にオフセット印
刷をおこなったときに版材の印刷性能や耐刷力に著しい
影響をおよぼすので、その良否は版材製造上重要な要素
となっている。印刷版用アルミニウム支持体の粗面化法
としては交流電解エッチング法が一般的に採用されてお
り、電流としては、普通の正弦波交流電流、矩形波など
の特殊交番波形電流が用いられている。そして、黒鉛等
の適当な電極を対極として交流電流により、アルミニウ
ム板の粗面化処理をおこなうもので、通常一回の処理で
行われているが、そこで得られるピット深さは全体的に
浅く、耐刷性能に劣るものであった。このため、直径に
比べて深さの深いピットが均一かつ緻密に存在する砂目
を有する印刷版用支持体として好適なアルミニウム板が
得られるように、数々の方法が提案されている。その方
法としては、特殊電解電源波形を使った粗面化方法（特
開昭５３−６７５０７号公報）交流を使った電解粗面化
時の陽極時と陰極時の電気量の比率（特開昭５４−６５
６０７号公報）、電源波形（特開昭５５−２５３８１号
公報）、単位面積あたりの通電量の組み合わせ（特開昭
５６−２９６９９号公報）などが知られている。2. Description of the Related Art An aluminum plate (including an aluminum alloy plate) is used as an aluminum support for a printing plate, particularly as a support for an offset printing plate. Generally, in order to use an aluminum plate as a support for an offset printing plate, it is necessary that the aluminum plate has appropriate adhesiveness to a photosensitive material and water retention. For this purpose, the surface of the aluminum plate must be roughened so as to have a uniform and dense grain. This surface roughening treatment has a significant effect on the printing performance and printing durability of the plate material when offset printing is actually performed after plate making, and its quality is an important factor in plate material production. As a method of roughening the aluminum support for a printing plate, an AC electrolytic etching method is generally employed, and as the current, a special alternating waveform current such as a normal sine wave AC current or a rectangular wave is used. . The surface of the aluminum plate is roughened by alternating current using a suitable electrode such as graphite as a counter electrode, and is usually performed in a single process, but the pit depth obtained there is generally shallow. And the printing durability was poor. For this reason, various methods have been proposed so as to obtain an aluminum plate suitable as a support for a printing plate having a grain having fine and even pits deeper than the diameter and having uniform pits. As a method therefor, a surface roughening method using a special electrolytic power source waveform (Japanese Patent Application Laid-Open No. 53-67507), a ratio of the quantity of electricity between the anode and the cathode during electrolytic surface roughening using an alternating current (Japanese Patent Application Laid-Open No. 54-65
607), a power supply waveform (Japanese Patent Application Laid-Open No. 55-25381), a combination of the amount of current per unit area (Japanese Patent Application Laid-Open No. 56-29699), and the like are known.
【０００３】また特公昭６１−６０７９７号公報では、
アルミニウム板に陽極時間及び陰極時間の内少くとも一
方の各周期内に電圧が０になるような休止時間がある交
番波形電圧を印加し、陽極時電気量が陰極時電気量より
も大きくなる様に流すことにより、均一な粗面が得られ
ると記載されている。しかしながら、ＪＩＳ３００３材
に代表されるような合金成分の多い材料を前記印刷版用
アルミニウム板に大量に用いる場合、アルミニウム板ロ
ット間の合金成分の微量成分のばらつきなどによって、
生成する砂目の形状が変化し、印刷性能のばらつきを生
ずることがあった。この問題点を解決する方法として、
波形上の対策として、本発明者らは、最近、印刷版用ア
ルミニウム支持体の製造方法において、１サイクル当り
の陽極時間をｔF ，陰極時間をｔR とすると、それぞれ
の電流のピーク値迄に達する時間が、それぞれｔF ，ｔ
R の０．１％以上２０％以下であることを特徴とする電
解処理方法を提案した。この電流のピーク値迄に達する
時間を短くする方法として電源装置内のインダクタンス
成分の低減，負荷のインダクタンス成分の低減，負荷の
抵抗成分の増加，負荷と直列に抵抗を入れるなど数々試
みられて来た。In Japanese Patent Publication No. 61-60797,
Apply an alternating waveform voltage to the aluminum plate that has a pause time such that the voltage becomes 0 in at least one of the anode time and the cathode time, so that the amount of electricity at the anode becomes larger than the amount of electricity at the cathode , A uniform rough surface can be obtained. However, when a material having a large alloy component such as JIS3003 material is used in a large amount for the aluminum plate for the printing plate, a variation in a trace component of the alloy component among the aluminum plate lots causes
In some cases, the shape of the generated grain changes, resulting in variations in printing performance. To solve this problem,
As a countermeasure against the waveform, the present inventors have recently proposed a method for manufacturing an aluminum support for a printing plate, in which the anode time per cycle is t F and the cathode time is t R, and the peak value of each current is reached. Are reached at t F and t, respectively.
An electrolytic treatment method characterized in that R is 0.1% or more and 20% or less is proposed. A number of attempts have been made to reduce the time required to reach the peak value of the current, such as reducing the inductance component in the power supply, reducing the inductance component of the load, increasing the resistance component of the load, and inserting a resistor in series with the load. Was.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、電源又
は負荷のインダクタンス成分を減少させるには、電源の
容量を小さくしたり、負荷の電解処理層を小型化する方
法などがあるが、それでは大量生産には適さないという
問題点があった。また、負荷の抵抗成分を増加させるた
めには、負荷と直列に抵抗を入れる方法があるが、抵抗
が増加すると、電圧が上昇して、電力コストが多大にか
かるという欠点があった。さらにまた、負荷に変動があ
ると電流の波形が変化し、特に電流のピーク値迄に達す
る時間が変化して生成する砂目の形状が変化することが
あるという欠点があった。上記負荷変動による電流の波
形変化を防止するためには、負荷に変動があっても電流
の波形に変化が起こり難くすることによる課題の解決方
法も可能であるが、この方法では自ずから限界がある。
本発明の目的は、より積極的に負荷変動による電流波形
変化を防止するように電流反転回路を制御する方法によ
りコストを過大にかけることなく問題点を解消し、大量
生産に適する安定な、そして深いピットが均一かつ緻密
に存在する粗面化が得られる、電解処理方法を提供する
ことにある。However, in order to reduce the inductance component of the power supply or the load, there are a method of reducing the capacity of the power supply and a method of reducing the size of the electrolytic treatment layer of the load. There was a problem that was not suitable. In order to increase the resistance component of the load, there is a method of inserting a resistance in series with the load. However, when the resistance increases, there is a drawback that the voltage increases and the power cost is greatly increased. Furthermore, there is a drawback that if there is a change in the load, the waveform of the current changes, and in particular, the time required to reach the peak value of the current changes, and the shape of the generated grain may change. In order to prevent the current waveform change due to the load fluctuation, a method of solving the problem by making the current waveform hardly change even if the load fluctuates is possible, but this method naturally has a limit. .
An object of the present invention is to solve the problem without excessively increasing the cost by a method of controlling a current inverting circuit so as to more actively prevent a current waveform change due to a load change, and to be stable and suitable for mass production. An object of the present invention is to provide an electrolytic treatment method capable of obtaining a roughened surface in which deep pits are uniformly and densely present.
【０００５】[0005]
【課題を解決するための手段及び作用】本発明者らは、
交番電流を発生する電源を中心に鋭意検討した結果本発
明に達した。即ち、本発明の上記目的は金属イオンを含
む電解液中で、被処理材と対極との間に交番電流を供給
して電気化学的処理を施す印刷版用アルミニウム支持体
の電解処理方法において、電源回路に負荷と並列にダイ
オードブリッジとコンデンサを直列に接続したものを図
１に示す通りに接続し、ダイオードのブリッジ回路の端
子に並列にコンデンサを接続する。さらに、電流波形を
検知する回路及び検知した波形と設定波形との違いを補
正するフィードバック回路を設ける。このフィードバッ
ク回路からの信号によって決まる電圧をダイオードのブ
リッジ回路の端子に並列に接続されているコンデンサの
両端にかけることによってダイオードのブリッジの中辺
からの電圧を制御し、これによりＧＴＯ電流反転回路を
制御して負荷変動による電流の波形変化を防止する印刷
版用アルミニウム支持体の電解処理方法によって課題を
解決した。Means and Action for Solving the Problems The present inventors have
As a result of intensive studies focusing on a power supply that generates an alternating current, the present invention has been achieved. That is, the object of the present invention is to provide an aluminum support for a printing plate for performing an electrochemical treatment by supplying an alternating current between a material to be treated and a counter electrode in an electrolytic solution containing metal ions.
In the above electrolytic treatment method, a power supply circuit in which a diode bridge and a capacitor are connected in series in parallel with a load is connected as shown in FIG. 1, and a capacitor is connected in parallel to a terminal of the diode bridge circuit. Further, a circuit for detecting a current waveform and a feedback circuit for correcting a difference between the detected waveform and a set waveform are provided. The voltage from the middle side of the diode bridge is controlled by applying a voltage determined by the signal from the feedback circuit to both ends of the capacitor connected in parallel to the terminal of the diode bridge circuit. Printing to control and prevent current waveform change due to load fluctuation
The problem was solved by an electrolytic treatment method for an aluminum support for a plate .
【０００６】本発明において金属イオンを含む電解処理
液中とは、電解処理を行う対象となる金属を主体とした
金属イオンを当初より電解処理液中に含ませることで、
本発明のアルミニウムウエブの電解処理の場合含ませる
アルミニウムイオン濃度としては２〜２０グラム／リッ
トルが好ましい。このイオン濃度は電解粗面化処理の場
合の粗面化の品質に大きな影響を有するものである。本
発明における交番電流を供給する交流反転制御回路を入
れた電源とは、基本的にはブリッジ回路の４辺にそれぞ
れ反転素子を設け、相対する辺の反転素子を対として、
２対を交互にゲート信号によりオン・オフさせることに
よって中辺に交流を発生させるブリッジ回路よりなる電
源であり、そのブリッジ回路の中辺（対極）に、両端子
に並列にコンデンサを有するダイオードのブリッジ回路
の中辺（対極）を接続し、このコンデンサの両端にかけ
る電圧によって交番電流波形が制御し得るように設計さ
れた交流反転制御回路を有する電源である。反転素子に
はゲートターンオフサイリスタ（ＧＴＯ）を用いるのが
一般的である。In the present invention, the term “in an electrolytic treatment solution containing metal ions” means that metal ions mainly composed of a metal to be subjected to an electrolytic treatment are included in the electrolytic treatment solution from the beginning.
The concentration of aluminum ions contained in the electrolytic treatment of the aluminum web of the present invention is preferably 2 to 20 g / liter. This ion concentration has a great influence on the quality of the surface roughening in the case of the electrolytic surface roughening treatment. The power supply containing the AC inversion control circuit that supplies the alternating current according to the present invention basically means that inversion elements are provided on four sides of the bridge circuit, and the inversion elements on opposite sides are paired.
A power supply composed of a bridge circuit that generates an alternating current on the middle side by alternately turning on and off two pairs by a gate signal. A diode having a capacitor in parallel with both terminals on the middle side (counter electrode) of the bridge circuit This is a power supply having an AC inversion control circuit connected to the middle side (counter electrode) of a bridge circuit and designed so that an alternating current waveform can be controlled by a voltage applied to both ends of the capacitor. In general, a gate turn-off thyristor (GTO) is used for the inversion element.
【０００７】次ぎに本発明に用いる電源を図１によって
詳しく説明する。図１は本発明の電解処理方法に用いる
電源の基本回路図を示す。図１において、１、７はコン
デンサ、２ａ、２ｂ、２ｃ及び２ｄは反転素子である。
サージ電圧の関係から耐圧の大きなゲートターンオフサ
イリスタ（ＧＴＯ素子）を使用しているが、これに限ら
れるものではない。ブリッジ回路の４辺にそれぞれ反転
素子２ａ、２ｂ、２ｃ、２ｄを設け、相対する辺の反転
素子２ａ、２ｄそして反転素子２ｂ、２ｃを対として、
２対を交互にゲート信号によりオン・オフさせることに
よって対極に交流を発生させるのである。この対極に発
生する交番電流の波形が負荷３の抵抗値の変動によって
設定波形から変異しないように、負荷３における交番電
流の波形を波形検出回路６によって検知し、検知した交
番電流の波形をフィードバック回路５において設定波形
と対比し、差異の補正に相当する電圧をフィードバック
回路５からコンデンサ１の両端に遺還し、これをダイオ
ード４ａ、４ｂ、４ｃ、４ｄから成るブリッジ回路で設
定交番電流との差電流として、この差電流をＧＴＯ素子
から成るブリッジ回路の対極に付与して出力電流を設定
交番電流に近い交番電流として安定化させる交流反転制
御回路を有する電源である。Next, the power supply used in the present invention will be described in detail with reference to FIG. FIG. 1 shows a basic circuit diagram of a power supply used in the electrolytic treatment method of the present invention. In FIG. 1, 1 and 7 are capacitors, 2a, 2b, 2c and 2d are inversion elements.
Although a gate turn-off thyristor (GTO element) having a large withstand voltage is used because of the surge voltage, the present invention is not limited to this. Each inverting element 2a the four sides of the bridge circuit, 2b, 2c, and is provided 2d, in pairs the inverting element 2a, 2 d and the inverted element 2b, 2 c of the opposing sides,
An alternating current is generated at the opposite electrode by alternately turning on and off the two pairs by a gate signal. The waveform of the alternating current at the load 3 is detected by the waveform detection circuit 6 so that the waveform of the alternating current generated at the opposite electrode does not vary from the set waveform due to the change in the resistance value of the load 3, and the detected waveform of the alternating current is fed back. In the circuit 5, a voltage corresponding to the correction of the difference is compared between the feedback circuit 5 and both ends of the capacitor 1 and compared with a set waveform. The bridge circuit composed of the diodes 4a, 4b, 4c, and 4d converts the voltage with the set alternating current. This is a power supply having an AC inversion control circuit that applies the difference current as a difference current to a counter electrode of a bridge circuit including a GTO element to stabilize an output current as an alternating current close to a set alternating current.
【０００８】図２は、本発明の電解処理装置の１実施例
の概略側面図であるが，、図２において１１はアルミニ
ウム板であり、１２は、電極とアルミニウム板のクリア
ランスを保つドラムロール、１３はパスロール，１４は
電解液で、平版印刷版用支持体としてのアルミニウム板
を粗面化する場合、電解液１４としては硝酸，または塩
酸を主体とする電解液が用いられる。１５は電解液の排
出口であり、ここの液面を保つことで電解処理槽２０内
の液面を一定に保つ。１６は主対極であり、一般に黒鉛
電極が用いられる。またこの電極の劣化防止の為、電源
に主対極と、並列に接続した補助対極２２（図示せず）
を布設することが好ましい。補助対極２２は、白金，鉛
など各種あるが、フェライト電極が望ましい。１７は主
対極の電解処理槽へ送液するポンプで、本実施例には図
示されていないが、物性測定用の機器，温度制御用のコ
ントローラー，異物除去の為のフィルターを、ポンプ後
の配管に布設しても良い。１８は電源である。FIG. 2 is a schematic side view of one embodiment of the electrolytic treatment apparatus according to the present invention. In FIG. 2, reference numeral 11 denotes an aluminum plate, 12 denotes a drum roll for maintaining a clearance between the electrode and the aluminum plate, Reference numeral 13 denotes a pass roll, and reference numeral 14 denotes an electrolytic solution. When the aluminum plate as a lithographic printing plate support is roughened, an electrolytic solution mainly composed of nitric acid or hydrochloric acid is used as the electrolytic solution. Reference numeral 15 denotes a discharge port for the electrolytic solution, and the liquid level in the electrolytic treatment tank 20 is kept constant by maintaining the liquid level here. Reference numeral 16 denotes a main counter electrode, which is generally a graphite electrode. In order to prevent the deterioration of the electrode, a main counter electrode is connected to the power supply and an auxiliary counter electrode 22 (not shown) connected in parallel.
Is preferably laid. The auxiliary counter electrode 22 may be of various types such as platinum and lead, but is preferably a ferrite electrode. Reference numeral 17 denotes a pump for feeding a liquid to the electrolytic treatment tank at the main counter electrode, which is not shown in the present embodiment, but includes a device for measuring physical properties, a controller for controlling temperature, a filter for removing foreign substances, and a pipe after the pump. It may be laid in. 18 is a power supply.
【０００９】この電源１８が既に上記した電流反転制御
回路を含む（詳細を図１に示した）電源であり、電解処
理装置に交番電流を供給する。周波数については求める
品質によって変化させられるが、平版印刷版用支持体の
アルミ粗面化においては１５ＨＺ以上が望ましい。１９
は電解液のストックタンクであり、ポンプ１７を介して
電解液供給口２１から電解液１４が供給される。本発明
で使用される電解液は、硝酸または塩酸を主体とした液
で、硝酸の場合の硝酸濃度５〜５０グラム／リットル、
その時の電解浴内のアルミニウムイオンの濃度は２〜２
０グラム／リットル、塩酸の場合の塩酸濃度５〜１００
グラム／リットル、その時のアルミニウムイオンの濃度
は２〜３０グラム／リットルが望ましい。また電解電流
の電流密度は１０〜８０Ａ／ｄｍ2 、電解浴温度３０℃
以上の条件が均一に砂目立てするには望ましい。The power supply 18 is a power supply including the above-described current inversion control circuit (shown in detail in FIG. 1), and supplies an alternating current to the electrolytic processing apparatus. The frequency is varied depending on the quality required, but is preferably 15 HZ or more in roughening the aluminum surface of the lithographic printing plate support. 19
Is a stock tank for the electrolyte, and the electrolyte 14 is supplied from the electrolyte supply port 21 via the pump 17. The electrolytic solution used in the present invention is a solution mainly composed of nitric acid or hydrochloric acid. In the case of nitric acid, the concentration of nitric acid is 5 to 50 g / liter,
At this time, the concentration of aluminum ions in the electrolytic bath is 2 to 2
0 g / l, hydrochloric acid concentration in case of hydrochloric acid 5-100
G / l, and the concentration of aluminum ion at that time is preferably 2 to 30 g / l. The current density of the electrolytic current is 10 to 80 A / dm 2 , and the electrolytic bath temperature is 30 ° C.
The above conditions are desirable for uniform graining.
【００１０】次ぎに本発明の電解処理方法の実施態様に
ついて更に詳しく説明する。アルミニウム支持体は、本
発明の電解処理の前にまずアルカリエッチングされる。
好ましいアルカリ剤は、苛性ソーダ，苛性カリ，メタ珪
酸ソーダ，炭酸ソーダ，アルミン酸ソーダ，グルコン酸
ソーダ等である。濃度０．０１〜２０％、温度は２０〜
９０℃、時間は５秒〜５分間の範囲から選択されるのが
適当であり、好ましいエッチング量としては、０．０１
〜５ｇ／ｍ２である。特にマンガン等不純物の多いアル
ミニウム支持体の場合、エッチング量としては０．０１
〜１ｇ／ｍ２が適当である。引き続き、アルカリエッチ
ングしたアルミニウム板の表面にアルカリに不溶な物質
（スマット）が残存するので、必要に応じてデスマッ卜
処理を行っても良い。前処理は上記の通りであるが、引
き続き本発明として金属イオンを含む電解液中で、交番
波形電流を使用して電気化学的に粗面化する。本発明で
使用される金属イオンを含む電解液は、硝酸または塩酸
を主体とした液で、硝酸の場合の濃度３〜１５０グラム
／リットルより好ましくは５〜５０グラム／リットル、
その中に含まれるアルミニウムイオンの濃度は５０グラ
ム／リットル以下であり、より好ましくは２〜２０グラ
ム／リットルである。塩酸の場合の濃度は２〜２５０グ
ラム／リットル、より好ましくは５〜１００グラム／リ
ットル、その時のアルミニウムイオンの濃度は５０グラ
ム／リットル以下、より好ましくは２〜３０グラム／リ
ッ卜ルである。この硝酸又は塩酸に、アンモニウムイオ
ン等添加物を入れても良いが、大量生産をする場合、液
濃度制御などが難しくなる。Next, embodiments of the electrolytic treatment method of the present invention will be described in more detail. The aluminum support is first alkali-etched before the electrolytic treatment of the present invention.
Preferred alkaline agents are caustic soda, caustic potash, sodium metasilicate, sodium carbonate, sodium aluminate, sodium gluconate and the like. Concentration 0.01-20%, temperature 20-
90 ° C. and the time are suitably selected from the range of 5 seconds to 5 minutes, and the preferable etching amount is 0.01
５5 g / m 2 . Particularly, in the case of an aluminum support having many impurities such as manganese, the etching amount is 0.01
〜1 g / m 2 is appropriate. Subsequently, since a substance (smut) insoluble in alkali remains on the surface of the alkali-etched aluminum plate, desmut treatment may be performed if necessary. The pretreatment is as described above, but in the present invention, the surface is electrochemically roughened using an alternating waveform current in an electrolytic solution containing metal ions. The electrolytic solution containing metal ions used in the present invention is a solution mainly composed of nitric acid or hydrochloric acid, and has a concentration of 3 to 150 g / l, more preferably 5 to 50 g / l in the case of nitric acid.
The concentration of aluminum ions contained therein is 50 g / l or less, more preferably 2 to 20 g / l. In the case of hydrochloric acid, the concentration is 2 to 250 g / l, more preferably 5 to 100 g / l, and the concentration of aluminum ion at that time is 50 g / l or less , more preferably 2 to 30 g / l. Additives such as ammonium ions may be added to the nitric acid or hydrochloric acid, but in the case of mass production, it becomes difficult to control the liquid concentration.
【００１１】また、電解電流の電流密度は５〜１００Ａ
／ｄｍ2 が適当であるが、１０〜８０Ａ／ｄｍ2 がより
好ましい。また、この様な条件は電気量と共に、求める
品質、使用されるアルミニウム支持体の成分などによっ
て随時選択される。なお、本発明で開発された負荷の抵
抗値の変動によって出力の交番電流の波形が設定波形か
ら変異しないように、負荷における交番電流の波形を波
形検出回路によって検知し、設定波形と対比し、差異の
補正に相当する電圧からフィードバックして交流反転制
御回路の出力電流を設定交番電流に近い交番電流として
安定化させる交流反転制御回路を有する電源及びその電
源を用いて行う電解処理方法は、電解コンデンサの製造
用の電源及び製造方法に適用できる。The current density of the electrolytic current is 5 to 100 A
/ Dm 2 is appropriate, but 10 to 80 A / dm 2 is more preferable. Such conditions are selected as needed depending on the quantity of electricity, the quality required, the components of the aluminum support used, and the like. In addition, the waveform of the alternating current in the load is detected by a waveform detection circuit so that the waveform of the alternating current in the output does not vary from the set waveform due to the change in the resistance value of the load developed in the present invention, and the waveform is compared with the set waveform. A power supply having an AC inversion control circuit for stabilizing the output current of the AC inversion control circuit as an alternating current close to the set alternating current by feeding back from a voltage corresponding to the difference correction, and an electrolytic processing method performed using the power supply, comprising: The present invention can be applied to a power supply and a manufacturing method for manufacturing a capacitor.
【００１２】[0012]
【実施例】実施例−１ 図２のような電解処理槽，並びに図１の様な電源を用い
て、ＪＩＳ１０５０材アルミニュウム板の粗面化処理を
行った。硝酸濃度１０グラム／リットル、電解液中のア
ルミニュウムイオン濃度７グラム／リットル、温度５５
℃の電解液を作成して、ポンプ１７を介して電解処理槽
２０に送液した。この電解処理槽２０に通電して電源中
のコンデンサにかかる電圧を２０Ｖにして電解粗面化処
理を行った。陽極時の電気量を５００クーロンとなる様
にに設定し、４０ＨＺの周波数で電解粗面化処理を行っ
た。電解処理槽直前の電流波形をオシロスコープで観察
したところ、０．３ミリ秒でピーク電流に達していた。
粗面化後のピットを電子顕微鏡で観察したところ、均一
なピットが生成していた。EXAMPLE 1 Using an electrolytic treatment tank as shown in FIG. 2 and a power supply as shown in FIG. 1, a JIS1050 aluminum plate was subjected to surface roughening treatment. Nitric acid concentration 10 g / l, aluminum ion concentration in electrolyte 7 g / l, temperature 55
An electrolytic solution of ° C. was prepared and sent to the electrolytic treatment tank 20 via the pump 17. The electrolytic treatment tank 20 was energized to set the voltage applied to the capacitor in the power supply to 20 V to perform the electrolytic surface roughening treatment. The amount of electricity at the anode was set to be 500 coulombs, and the electrolytic surface roughening treatment was performed at a frequency of 40 HZ. When the current waveform immediately before the electrolytic treatment tank was observed with an oscilloscope, the peak current reached 0.3 ms.
When the pits after the surface roughening were observed with an electron microscope, uniform pits were formed.
【００１３】実施例−２ （実施例−１）と同じ電解処理槽及び電解液を用い、電
源中のコンデンサにかかる電圧を３０Ｖにして、（実施
例−１）と同じ条件で電解粗面化処理を行った。波形を
オシロスコープで観察したところ、３．２ミリ秒でピー
ク電流に達していた。粗面化後のピットを電子顕微鏡で
観察したところ、１０〜２０μｍの不均一なピットが生
成していた。Example 2 The same electrolytic treatment tank and electrolytic solution as in Example 1 were used, the voltage applied to the capacitor in the power supply was set to 30 V, and the surface of the electrolytic solution was roughened under the same conditions as in Example 1. Processing was performed. When the waveform was observed with an oscilloscope, the peak current was reached in 3.2 ms. When the pits after the surface roughening were observed with an electron microscope, non-uniform pits of 10 to 20 μm were formed.
【００１４】[0014]
【発明の効果】本発明の電解処理方法により電流のピー
ク値に達する時間が短くなり、大量生産に適した電力コ
ストの適当な条件で、而も良好なピット条件で電解粗面
化処理を行うことができるようになった。According to the electrolytic treatment method of the present invention, the time required to reach the peak value of the current is shortened, and the electrolytic surface roughening treatment is carried out under favorable pit conditions under appropriate conditions of power cost suitable for mass production. Now you can do it.
【図１】図１は本発明の電解処理方法に用いる電源の基
本回路図である。FIG. 1 is a basic circuit diagram of a power supply used in the electrolytic processing method of the present invention.
【図２】図２は本発明の電解粗面化処理方法の一実施例
の電解処理槽の概略側面図である。FIG. 2 is a schematic side view of an electrolytic treatment tank according to one embodiment of the electrolytic surface roughening treatment method of the present invention.
１ コンデンサ ２ 反転素子 ２ａ 反転素子 ２ｂ 反転素子 ２ｃ 反転素子 ２ｄ 反転素子 Ａ 出力端子 Ｂ 出力端子 ３ 負荷 ４ ダイオード ４ａ ダイオード ４ｂ ダイオード ４ｃ ダイオード ４ｄ ダイオード ５ フィードバック回路 ６ 波形検出回路７ コンデンサ １１ アルミニウム板 １２ 電極 １３ パスロール １４ 電解液 １５ 電解液の搬出口 １６ 主対極 １７ ポンプ １８ 電源 １９ 電解液のストックタンク ２０ 電解処理槽 ２１ 電解液供給口 ２２ 補助対極 Reference Signs List 1 capacitor 2 inversion element 2a inversion element 2b inversion element 2c inversion element 2d inversion element A output terminal B output terminal 3 load 4 diode 4a diode 4b diode 4c diode 4d diode 5 feedback circuit 6 waveform detection circuit7 Capacitor DESCRIPTION OF SYMBOLS 11 Aluminum plate 12 Electrode 13 Pass roll 14 Electrolyte 15 Electrolyte carry-out port 16 Main counter electrode 17 Pump 18 Power supply 19 Electrolyte stock tank 20 Electrolytic treatment tank 21 Electrolyte supply port 22 Auxiliary counter electrode
Claims (1)
と対極との間に交番電流を供給して電気化学的処理を施
す印刷版用アルミニウム支持体の電解処理方法におい
て、電源回路に負荷と並列にダイオードのブリッジ回路
を接続し、該ブリッジ回路の端子に並列に電圧制御用の
コンデンサを入れ、電流反転制御回路によって交番電流
を発生させ電解粗面化処理を行うことを特徴とする印刷
版用アルミニウム支持体の電解処理方法。1. An electrolytic treatment method for an aluminum support for a printing plate , wherein an alternating current is supplied between an object to be treated and a counter electrode in an electrolytic solution containing metal ions to perform an electrochemical treatment. Diode bridge circuit in parallel with load
Connect, put <br/> capacitor for voltage control in parallel to the terminals of the bridge circuit, and performing electrolytic graining treatment caused the Koban current by the current inversion control circuit printing
An electrolytic treatment method for an aluminum support for a plate .
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8903991A JP2715346B2 (en) | 1991-03-29 | 1991-03-29 | Electrolytic treatment of aluminum support for printing plate |
| US07/843,173 US5221442A (en) | 1991-03-07 | 1992-02-28 | Method and apparatus for electrolytic treatment |
| DE69223077T DE69223077T2 (en) | 1991-03-07 | 1992-03-04 | Method and device for electrolytic treatment |
| EP92103695A EP0502507B1 (en) | 1991-03-07 | 1992-03-04 | Method and apparatus for electrolytic treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8903991A JP2715346B2 (en) | 1991-03-29 | 1991-03-29 | Electrolytic treatment of aluminum support for printing plate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04301100A JPH04301100A (en) | 1992-10-23 |
| JP2715346B2 true JP2715346B2 (en) | 1998-02-18 |
Family
ID=13959755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8903991A Expired - Fee Related JP2715346B2 (en) | 1991-03-07 | 1991-03-29 | Electrolytic treatment of aluminum support for printing plate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2715346B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS591526U (en) * | 1982-06-29 | 1984-01-07 | 明和精機有限会社 | Cemented carbide circular saw with saw |
| JPH075981Y2 (en) * | 1988-01-30 | 1995-02-15 | 三京ダイヤモンド工業株式会社 | Diamond abrasive grain electrodeposition cutter |
-
1991
- 1991-03-29 JP JP8903991A patent/JP2715346B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04301100A (en) | 1992-10-23 |
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