Effect of Cylinder Radial Runout on Overprint Accuracy in Flexographic Press
YUAN Yingcai;CUI Can;SUN Wanjie;Beijing Institute of Graphic Communication;
Under the state of high- speed printing,maintaining a good overprint accuracy is an important performance of the press. For the problem of overprint accuracy caused by the rapidly increasing radial runout of the cylinder( or roller) in the high-speed printing state,based on the structure and printing process of satellite-based flexographic press,this paper analyzes the effect of radial runout on the actual print position,an analysis model of overprint accuracy influenced by radial runout is established. By the model,the factor of overprint accuracy caused by radial runout is deduced,which could directly reflect the relationship of the size of cylinder( or roller),radial runout and overprint accuracy. The model of overprint accuracy influenced by radial runout is verified by printing experiment and the test of radial runout.