| 摘要 |
PURPOSE:To make possible the printing of high quality using an optimal ink quantity by calculating reference data such as a unit ink quantity and pattern area relationship on the basis of the shaking cycle time of a shaking-type ink ductor roll and determining the opening of ink keys and the number of rotations of an ink fountain roll. CONSTITUTION:The number of rotations of a motor 8 for driving an ink fountain roll 1 is controlled by a control device 9. In addition, ink keys 10 for adjusting the thickness of ink film are provided in an axial direction on the sleeve surface of the roll 1. The percentage of pattern area of a printing plate is measured with a pattern area percentage gauge, and the ink keys 10 are controlled based on the data obtained consequently. Data such as the number of rotations of a plate cylinder, the width of the ink key 10 and pattern area percentage are used as reference values with the shaking cycle time of a shaking-type ink ductor roll 2 as a reference. Furthermore, finally the opening of the ink keys 10 and the number of rotations of the ink fountain roll 1 are obtained as actual measurement data on the basis of 'relationship between unit ink quantity and pattern area percentage' and 'relationship between the opening of ink keys and the thickness of ink film' as reference data. |
