The Dynamic Performance Study Of The Sheet Offset Inking System

The printing process is transferring the ink spreaded on the press plate to the printing paper by printing pressure. The effect of inking system is to transfer the ink to the surface of the press plate. Because the even degree, the thickness of the ink on the press plate and the performance of inking system can play important influence on the quality of the printing paper, the inking system is one of the most important composition in the offset machine. An inking system with good performance is the important Guarantee to go high quality printing.The main contents and innovations are as follows:(1) Analyzing the motion of the main string roller is to have motion simulation by building the model of stringing ink organization.The research shows that the speed and acceleration of the main string roller does not accord with the sine curve, which has a lot of difference with the sine curve, but its movement Displacement nearly accord with the sine curve.(2) Analyzing the dynamic inking performance of the inking rollers. The research shows that the process of spreading ink on the press plate is dynamic, the change of ink thickness will play important influence on the printing paper. Advising that making the inking rollers axial move in some degree to improve the After first depth, pale phenomenon on the printing paper which is caused by the exit of neutral gear angle.(3) Analyzing the relation between the elastic deformation of the rollers and the performance of inking system. The research shows that in the process transferring ink, the press occurring rollers and the ink shift quantity is mutual influence and interaction.The press is not the bigger, the better, but also the smaller, the better, which has close relation with the roller material, the ink performance and the article coverage on the press plate.(4) Analyzing the influence of the neutral gear angle putted on the cylinders. The research shows that the exit of neutral gear angle will play important influence on the stable time and the quality. In the design of the sheet offset, the factor of neutral gear angle on the cylinders should be considered to reduce the bad influence.(5) All above studies achievement, considering the elastic deformation of the rollers and the ink coherency to bring a kind of model to provide reference for the design of inking system, press adjustment and speed controller.