Intelligent Closed-loop Ink Metering System and Automatic Compensation Technology for Modern Flexo Press
This paper introduces intelligent closed-loop
flexo ink metering system, realizes real-time automatic ink compensation through online color density detection, and solves manual ink metering lag and color fluctuation problems.
Traditional manual flexo ink metering belongs to open-loop control mode. Operators test printed color density regularly and adjust doctor blade pressure or ink viscosity manually. This manual adjustment has obvious time lag, leading to continuous color fluctuation within adjustment interval and producing transitional defective products.
Working principle of intelligent closed-loop ink metering system. Online optical density cameras detect real-time ink color density on printed web surface, transmit density deviation data to servo control system, and the system automatically modifies doctor blade pressure and ink circulation parameters to correct ink metering volume without manual intervention.
High Speed Flexo Printing Machine - Stack Flexo Flexo Printing Machine
Linkage relationship between ink metering parameters and color density. Increasing doctor blade pressure reduces residual ink volume on anilox roller and lowers printing color density; reducing blade pressure increases ink transfer volume and deepens color tone. The intelligent system establishes mathematical linkage model between pressure parameter and density value for fast and accurate automatic correction.
Segmented ink metering adjustment for full-web width uniformity. Traditional integral blade pressure leads to inconsistent ink metering between web center and edges. The segmented ink metering system adjusts local blade pressure at left edge, middle area and right edge separately to eliminate transverse full-web color density difference.
Ink metering adaptation for variable printing speed. The system links printing speed signal with ink metering parameters automatically. When speed rises, the system raises blade pressure moderately to offset hydrodynamic pressure interference, keeping consistent ink metering effect at variable running speeds.
Actual application effect of intelligent ink metering system: color fluctuation range reduces from 11% to 2.7%, transitional defective materials caused by manual adjustment decrease by 89%, and long-run printing color consistency is improved significantly without frequent manual parameter intervention.
