Blagodir O. Technological regularities of ink transfer using anilox roller inking systems in flexographic printing

The thesis is devoted to complex research of mutual impact of contact pairs in the anilox roller printing systems and methods of their stabilization to regulate characteristics of prints. The main characteristics, parameters and modes that affect the qualitative and quantitative indicators of anilox roller ink transfer are analyzed. The mathematical description of physical processes required to build a simulation model of ink transfer between rotating cylinders of short inking system, that takes into account the system components characteristics and basic physical processes is proposed. The simulation method of anilox roller ink transfer process that considers various cells geometry, wettability of the printing plate, printing modes and rheological properties of ink is developed. The impact of anilox roller characteristics, printing plate wettability, ink rheology and printing modes on the ink transfer process is established. The developed simulation method is used to predict dosage of fountain solution in offset printing. Using regression analysis the impact of technological environment components on the ink transfer ratio is determined. The recommendations of technical characteristics stabilization of printing technological environment process with short inking unit and its main components are developed. These recommendations ensure normalization of print parameters reproduction by carrying out the preliminary simulation to refine the technological environment parameters.