Dynamic Simulation Modeling of Inking System Based on Elastohydrodynamic Lubrication

The inking system is an important part in the offset press, and a well performing inking system is essential for high quality printing. In this paper the Reynolds equation for ink transfer was deducted on the basis of the elastohydrodynamic lubrication theory. It establishes the relationship model between roller parameters such as pressure and ink thickness in roller gap by Hertz contact theory, so as to obtain the minimum thickness of the ink roller gap equation. As an object in Roland 700, through using computer simulation and modifying the ink transfer model, this study analyzes the influence of printing speed on the performance of ink transfer with the consideration of retention of ink in rollers gap.