Investigation on deflection of printing press cylinder caused by their disbalanse

Abstract

The deflections caused by a disbalance of rotating plate, blanket and printing cylinders pressed against each other in web offset press printing station worsen the quality of the prints. Herein, the method of an analytical computer - aided investigation of such deflections is proposed. It is shown that excentricities of disbalances of the cylinders in modern printing equipment should not exceed 0.04-0.1 mm and the impact of centrifugal forces caused by a disbalance upon deflections of the cylinders may be assessed in a statical way, because critical revolutions of the cylinders considerably exceed their maximal revolutions. The principal regularities of deflections of the cylinders have been explored.