인쇄 롤러 사이의 Nip 출구에서 잉크 유동에 관한 연구

Abstract

Ink is controlled the positive pressure through its compression at going into a nip and the negative pressure through its tensile stress and cohesiveness at a way out. At the way out, ink is splitted by a couple of rollers which is transferred and printed. In the high-speed printing, some trouble as an orange peel, misting, and so on can occur on the current printing system. The picking and linting of papers are related to the splitting point of ink filament on the exit in between and ink film thickness that seriously influence the final printed-paper density and smoothness. In the printing process, the flow of ink in a nip particularly determines the ink transfer, picking of paper, and printing quality. Therefore, this study was aimed at that the free surface of the ink on the exit of the nip determines due to change the ink conditions as properties, amount, and so on. It was tested by the computer simulation which described the flow of ink in the nip, and testified through the experiment.