Research Of Double-Sided Offset Press Inking System

The performance of the offset press inking system influences the printing quality. The design of inking system is one of the most import parts of the offset press design. In this paper, the method of computer simulation was adopted in researching and analyzing the inking system of offset press. The systematic model and the simulation model were built by JP40 double-sided offset press inking system. The program was edited by Matlab and VB. The simulation model was carried out by theory analysis. This thesis has developed a simulated software for analyzing the working performance of JP40 double-sided offset press inking system. The simulated software has some theory and economic value .As a result, a new method is offered to design and evaluate the inking system.The main contents and innovations are as follows:(1) The analysis of inking system is objected by JP40 double-sided offset press. The relation between ink flow ration of ink form rollers and split ration or the plate coverage is studied respectively.(2) According to Dijkstra method and graph theory, the response time is calculated. The influence of ink gravity to response time is studied by the law of conservation of energy.(3) The vibration characteristics of the vibrators and its effect on the steady state of the inking system was studied extensively, and the oscillation rate, stroke length and phase angle was used as control variable. Then the ink distribution is acquired under different oscillation parameter. It provides theoretical foundation for setting the suitable oscillation parameter.(4) Based on the oscillation model of vibrators, the steady time was calculated. The result shows that the split ratio and the plate coverage were both related to the inking system steady time. In addition, it calculated the front and back ink road separately whether considering the ink gravity or not.(5) The simulated software of JP40 double-sided offset press inking system is developed. It calculated 5 static capability and 2 dynamic capability of both the front and back system. Especially, in the mode of response time and steady time, it gave the results of the front and back ink road separately whether considering the ink gravity or not. It can improve the efficiency of design, can satisfy especial request of corporation and can provide good platform for corporation to design and improve the inking system.