1. Principles of Modern Stack & CI Flexographic Presses
Flexographic printing remains the dominant process for high-speed flexible packaging embellishment. Modern Ashal flexo presses achieve speeds up to 200 m/min with registration tolerances under ±0.15 mm, delivering high-definition graphics on polyolefin films, paper, and non-woven substrates.
2. Laser Ceramic Anilox Roller Engineering
The anilox roller is the heart of the flexographic ink metering system. Laser-engraved ceramic anilox rollers feature hexagonal cell geometry (60° cell angle) with cell counts ranging from 200 LPI (for solid background coverage) to 1000 LPI (for fine process halftone printing). Matching anilox cell volume (BCM/sq in) to plate screen frequency ensures crisp dot reproduction without dot gain or ink flooding.
3. Enclosed Chamber Doctor Blade Fluid Dynamics
Enclosed chamber doctor blade systems replace open ink fountains, eliminating solvent evaporation, maintaining constant ink viscosity, and preventing air entrapment at high speeds. Reverse-angle stainless steel or composite doctor blades wipe excess ink cleanly from the anilox surface.
4. High-Capacity Inter-Station Drying Systems
Rapid solvent or water evaporation between color stations is mandatory to prevent ink bleeding and trapping errors. Ashal presses integrate independent inter-station hot air blowers paired with an overhead drying tunnel, utilizing PID digital temperature regulators.