Cp.15 Flexographic, Ink-jet, and Digital Presses

Prof. Dr. Cao CongjunXi’an university of technology

Objects Major components of a flexographic press Function of an anilox roll Flexographic inking systems Flexographic plates making The operating principles of a continuous imaging press and a drop-demand ink-jet printer

Explain the terms direct imaging press and digital toner-based printing and operating principles of the both printing systems.

Explain the operating principles of a digital press.

Outline the advantages digital printing has over every traditional printing method.

Application: 标签 / 商标

塑料软包装

Cardboard卡纸

胶印 / 凹印 / 柔印

15.1Flexographic Printing Concept-P354 Components of a flexographic press※Infeed unit※Printing unit: Three-roller inking system and two-roller inking system※Outfeed unit

放卷机组 印刷机组 印后加工机组 收卷机组驱动机组

机组式柔性版印刷生产线

15.1.1 Flexographic Plates Rubber plates Photopolymer plates※Sheet photopolymer plates※ Liquid photopolymer plates

Steps

15.1.2 Flexographic Press The stack press Central impression press In-line press

层叠式柔性版印刷机

柔性版印刷机

机组式柔性版印刷机卫星式柔性版印刷机

15.2 Ink-jet printing-P366 Continuous

Ink-jet Technology

Drop-on-Demand Systems

Ink-jet Applications

Functioning principles for ink jet technologiesFig. a Continuous ink jetb Drop on demand ink jet/thermal ink jet;

c Drop on demand ink jet/piezo ink jet; d Electrostatic ink jet

Digital Printing-P370 Direct imaging presses※Advantages※Plate Exposure Digital toner based printing※Press Configuration Implications of Direct Digital Presses

DI press-Plate Exposure

Fig. Quickmaster DI computer to press/direct imaging system for multicolor printing in waterless offset (QM DI 46-4, Heidelberg)

Digital Toner Based PrintingFig.Computer to print system for multicolor printing (electrophotography, ROS laser imaging, liquid toner, intermediate cylinder) with the optionof sheet turning for double-sided (duplex) printing (E-Print 1000/TurboStream, Indigo)

Fig. Electrophotographic multicolor printing system with liquid toner (TurboStream(33 A4 pages/min), Indigo; diagram derived from company information, not confirmed)

Homework

P376 Review questions 1,2,6,7,8,9,12