미세 그라비아 옵셋 인쇄공정 내 잉크 전이에 관한 수치해석Numerical simulation of ink transfer in micro-gravure-offset printing

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A numerical study of the ink transfer processes that occur during micro-gravure- offset printing is carried out. Specifically, liquid transfer between two parallel separating plates and between a trapezoidal cavity and an upward moving plate are simulated, as models of the printing of ink from the offset pad onto the substrate and the picking up of ink from the gravure plate by the offset pad, respectively. During the liquid transfer between two parallel plates, the stretching, breaking and recoil of the liquid are illustrated, and the generation of a satellite droplet is observed. The influences of the separation velocity, liquid viscosity, surface tension, gravity force, and contact angles on the liquid transfer are estimated. For the transfer of liquid from the cavity to the upward moving plate, the findings indicate that the process can be divided into three stages: 1) a whole stretching stage; 2) a central stretching, breakup and recoil stage; and 3) an equilibrium stage.
Publisher
대한기계학회
Issue Date
2008-04-23
Language
ENG
Citation

대한기계학회 2008년도 열공학부문/유체공학부문 춘계학술대회 , pp.382 - 385

URI
http://hdl.handle.net/10203/162344
Appears in Collection
ME-Conference Papers(학술회의논문)
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