EP0928652B1 - Verfahren zum Herstellen eines Flachdruckplattenträgers - Google Patents

Verfahren zum Herstellen eines Flachdruckplattenträgers Download PDF

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Publication number
EP0928652B1
EP0928652B1 EP99100102A EP99100102A EP0928652B1 EP 0928652 B1 EP0928652 B1 EP 0928652B1 EP 99100102 A EP99100102 A EP 99100102A EP 99100102 A EP99100102 A EP 99100102A EP 0928652 B1 EP0928652 B1 EP 0928652B1
Authority
EP
European Patent Office
Prior art keywords
aluminum
range
plate
molten metal
support
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 - Lifetime
Application number
EP99100102A
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English (en)
French (fr)
Other versions
EP0928652A1 (de
Inventor
Masaya Matsuki
Hirokazu Sawada
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujifilm Holdings Corp
Original Assignee
Fuji Photo Film Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fuji Photo Film Co Ltd filed Critical Fuji Photo Film Co Ltd
Publication of EP0928652A1 publication Critical patent/EP0928652A1/de
Application granted granted Critical
Publication of EP0928652B1 publication Critical patent/EP0928652B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/001—Continuous casting of metals, i.e. casting in indefinite lengths of specific alloys
    • B22D11/003—Aluminium alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
    • B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
    • B22D11/06—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars
    • B22D11/0622—Continuous casting of metals, i.e. casting in indefinite lengths into moulds with travelling walls, e.g. with rolls, plates, belts, caterpillars formed by two casting wheels

Definitions

  • the present invention relates to a method for producing a planographic printing plate aluminum support by using a twin-roll continuous casting method. Particularly, the present invention relates to a method for producing a planographic printing plate aluminum support which is good in surface quality so that stripe-like surface-quality defects can be prevented from being generated in an aluminum plate continuously or intermittently in its rolling direction.
  • An aluminum plate (including an aluminum alloy plate) is used as a printing plate aluminum support, especially, as an offset printing plate support.
  • the aluminum plate is required to have both moderate attaching property and moderate water retention property with respect to a light-sensitive material.
  • the surface of the aluminum plate must be roughened to have uniform and fine particles. Because the surface-roughening treatment has a remarkable influence on both the printing performance and printing endurance of the plate material when offset printing is actually performed after plate making, the quality of the surface-roughening treatment becomes an important factor for production of the plate material.
  • An AC electrolytic etching method is generally used as a method for roughening the surface of the printing plate aluminum support.
  • an electric current an ordinary sinusoidal alternating current or a special alternating-waveform current such as a rectangular-wave current or the like is used.
  • a suitable electrode made from graphite or the like was used as a counter electrode so that the surface of the aluminum plate was roughened by an alternating current.
  • the treatment was generally performed by one step and the pit depth obtained therein was shallow as a whole, so that printing endurance was poor. Therefore, various methods have been proposed to obtain an aluminum plate adapted for a printing plate support having a grained surface in which pits each having a depth larger than its diameter exist uniformly and finely.
  • JP-A-53-67507 a surface-roughening method using a special electrolytic electric source waveform
  • JP-A means Unexamined Japanese Patent Publication (kokai)
  • JP-A-54-65607 the ratio of an anodic electric quantity to a cathodic one at the time of electrolytic surface-roughening by means of an alternating current
  • JP-A-55-25381 electric source waveform
  • JP-A-56-29699 combination of the quantity of current conduction per unit area
  • an ingot of aluminum is melted and held so that a slab (thickness: 400 to 600 mm; width: 1000 to 2000 mm; and length: 2000 to 6000 mm) is cast.
  • An impurity structure portion in a surface of the slab is subjected to a face mill cutter so as to be cut by a depth in a range of from 3 to 10 mm.
  • a heat holding step for holding a temperature in a range of from 480 to 540°C for a time in a range of from 6 to 12 hours is performed in a heat holding furnace in order to remove stress in the inside of the slab and make the structure uniform.
  • hot rolling is performed at a temperature in a range of from 480 to 540°C.
  • cold rolling is performed at room temperature to obtain a predetermined thickness.
  • annealing for making the structure uniform is performed so that the rolled structure, or the like, is homogenized, cold rolling is performed to a defined thickness to correct the plate to have good flatness.
  • the thus produced aluminum support is used as a planographic printing plate support.
  • the electrolytic surface-roughening is, however, particularly easily affected by the aluminum support which is a subject. Therefore, when the aluminum support is produced by the steps of melting holding, casting, face mill cutting and heat holding, metal alloy components etc. in the surface layer of the aluminum support may scatter to bring a cause of lowering of yield of the planographic printing plate even in the case where not only heating and cooling are repeated but also a face mill cutting step for cutting the surface layer is provided.
  • the following method for producing a planographic printing plate support has been proposed as a method in which not only variation in the material of the aluminum support is reduced but also the yield of the electrolytic surface-roughening treatment is improved to thereby produce an excellent-quality good-yield planographic printing plate (U.S. Patent No. 5,078,805 corresponding to JP-A-3-79798).
  • the method comprises the steps of continuously performing casting and hot rolling to form a thin-plate hot-rolled coil from molten aluminum, and performing cold rolling, heating and correction to roughen a surface of the aluminum support.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Printing Plates And Materials Therefor (AREA)
  • Continuous Casting (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)

Claims (3)

  1. Verfahren zum Herstellen eines Flachdruckplattenträgers, das folgende Schritte umfasst:
    Schmelzen von Aluminium
    Zuführen von geschmolzenem Aluminium zu einem Spalt zwischen einem Paar Kühlwalzen von einer Zufuhrdüse für geschmolzenes Metall mit einer Innenfläche, welche mit dem geschmolzenen Metall in Kontakt gebracht ist und mit Zuschlagpartikeln beschichtet ist, die eine Verteilung der Partikelgröße aufweisen mit eine Mediangröße in einem Bereich von 5 µm bis 20 µm und einem häufigsten Wert der Größe im Bereich von 4 µm bis 40 µm, um dadurch kontinuierlich plattenähnliches Aluminium zu gießen und zu walzen;
    Ausführen von mindestens einer Kaltwalzung und mindestens einmal Aufheizen, um eine dünne Aluminiumplatte mit einer Dicke in einem Bereich von 0,1 mm bis 0,5 mm auszubilden; und
    Verbessern der dünnen Aluminiumplatte, um einen Aluminiumträger zu bilden und ein Oberfläche des Aluminiumträgers aufzurauen.
  2. Verfahren nach Anspruch 1, wobei die Verteilung der Partikelgrößen bzgl. des häufigsten Wertes der Größe in einem Bereich von 7 µm bis 20 µm liegt.
  3. Verfahren nach Anspruchl, wobei die Verteilung der Partikelgrößen bzgl. des häufigsten Wertes der Größe in einem Bereich von 8 µm bis 12 µm liegt.
EP99100102A 1998-01-07 1999-01-04 Verfahren zum Herstellen eines Flachdruckplattenträgers Expired - Lifetime EP0928652B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP00175898A JP3580469B2 (ja) 1998-01-07 1998-01-07 平版印刷版用支持体の製造方法
JP175898 1998-01-07

Publications (2)

Publication Number Publication Date
EP0928652A1 EP0928652A1 (de) 1999-07-14
EP0928652B1 true EP0928652B1 (de) 2003-07-02

Family

ID=11510488

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99100102A Expired - Lifetime EP0928652B1 (de) 1998-01-07 1999-01-04 Verfahren zum Herstellen eines Flachdruckplattenträgers

Country Status (4)

Country Link
EP (1) EP0928652B1 (de)
JP (1) JP3580469B2 (de)
AT (1) ATE244083T1 (de)
DE (1) DE69909141T2 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005105366A (ja) * 2003-09-30 2005-04-21 Fuji Photo Film Co Ltd 平版印刷版用支持体の製造方法
JP4607692B2 (ja) * 2005-07-14 2011-01-05 富士フイルム株式会社 平版印刷版用支持体の製造方法
AU2008100847A4 (en) 2007-10-12 2008-10-09 Bluescope Steel Limited Method of forming textured casting rolls with diamond engraving
JP2009208140A (ja) 2008-03-06 2009-09-17 Fujifilm Corp 平版印刷版用アルミニウム合金板の製造方法、ならびに該製造方法により得られる平版印刷版用アルミニウム合金板および平版印刷版用支持体
JP2013078794A (ja) * 2012-09-07 2013-05-02 Fujifilm Corp 平版印刷版用アルミニウム合金板の製造方法、ならびに該製造方法により得られる平版印刷版用アルミニウム合金板および平版印刷版用支持体
CN104985141A (zh) * 2015-06-19 2015-10-21 洛阳鑫隆铝业有限公司 一种铝板生产线系统的生产工艺

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4526223A (en) * 1984-04-09 1985-07-02 Aluminum Company Of America Roll caster apparatus having converging tip assembly
EP0206989A1 (de) * 1985-06-14 1986-12-30 Schweizerische Aluminium Ag Asbestfreies Material mit anorganischen Fasern sowie ein Verfahren zur Herstellung des Materials
JPS62248543A (ja) * 1986-04-19 1987-10-29 Kobe Steel Ltd ストリツプキヤスタ−への溶湯供給装置
US4716956A (en) * 1986-12-03 1988-01-05 Aluminum Company Of America Roll caster feed tip and method
GB2198976B (en) * 1986-12-19 1990-10-17 Davy Mckeen Roll caster
JPH01215441A (ja) * 1988-02-24 1989-08-29 Kobe Steel Ltd 板材の連続鋳造方法
US4811781A (en) * 1988-03-17 1989-03-14 Hunter Engineering Company, Inc. Feed tip and continuous casting method using the feed tip
JPH02290652A (ja) * 1989-04-28 1990-11-30 Kobe Steel Ltd アルミニウム合金の双ロール鋳造方法
JP2767711B2 (ja) * 1989-08-22 1998-06-18 富士写真フイルム株式会社 平版印刷版用支持体の製造方法
EP0615801B1 (de) * 1993-03-09 1999-06-02 Fuji Photo Film Co., Ltd. Verfahren zum Herstellen eines Trägers für eine Flachdruckplatte
US5452827A (en) * 1993-07-13 1995-09-26 Eckert; C. Edward Nozzle for continuous caster
JPH0740017A (ja) * 1993-07-29 1995-02-10 Fuji Photo Film Co Ltd 平版印刷版用支持体の製造方法
BR9502834A (pt) * 1995-06-16 1997-09-23 Alcoa Aluminio Sa Método para a fundição de uma lamina de metal método para a fundição entre cilindros iguais de uma lamina de liga de aluminio e produto laminado
JPH10225750A (ja) * 1997-02-14 1998-08-25 Fuji Photo Film Co Ltd 連続鋳造圧延装置

Also Published As

Publication number Publication date
EP0928652A1 (de) 1999-07-14
DE69909141T2 (de) 2004-01-08
JP3580469B2 (ja) 2004-10-20
DE69909141D1 (de) 2003-08-07
ATE244083T1 (de) 2003-07-15
JPH11192537A (ja) 1999-07-21

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