Paper printing machine CI Flexo

for textilesfor OPP filmfor PE film

Overview
A central impression (CI) flexo printing machine uses a single large central impression cylinder to support the substrate, maintaining continuous contact and delivering tight registration for high-speed flexible packaging production. It is optimized for thin films such as PE and BOPP and for multi-color runs where minimal distortion and consistent web tension are essential.

How it works
The web is held around one central drum so material does not stretch or shift between color stations. The central drum often includes constant-temperature water cooling to protect heat-sensitive films. Chambered doctor blade systems with ink recirculation and automatic ink pumps reduce solvent loss and prevent ink drying. Independent drying tunnels with dedicated inlet and exhaust fans enable rapid ink setting at speed.

Performance & operating ranges

• Registration accuracy: ±0.15 mm.
• Mechanical/top speed: up to 250 m/min.
• Typical printing speed range: 50–200 m/min for continuous production.
• Central drum with constant-temperature water cooling for heat-sensitive films.
• PLC quantitative registration and automatic web guide system for stable multi-color printing.

Suitable substrates

• Flexible packaging films: clear PE, BOPP, PET, PVC — printed with minimal distortion.
• Paper products: kraft paper, paper bags, paper cups — good color saturation.
• Aluminum foil: barrier foils for food and pharmaceutical packaging — smooth ink laydown.
• Woven and non-woven fabrics: lightweight non-wovens and breathable films used in hygiene products.

CI vs Stack vs Inline vs Digital — plant fit summary

• CI Flexo: 50–200 m/min, ±0.15 mm precision — best for thin films, flexible packaging and high-speed multi-color printing.
• Stack Flexo: typically 40–150 m/min, ±0.15 mm — smaller footprint, suited to thicker paper, sacks and basic bags.
• Inline Flexo: typically 100–200 m/min, ~±0.1 mm — integrates rotary die-cutting, suited to folding cartons and labels.
• Digital Printing: 10–50 m/min — instant setup and no plate costs, best for short runs and custom jobs.

Operational benefits and real-world result
Substrates locked to the central drum eliminate register shift during color transfers, reducing film waste and speeding setups. In a documented retrofit to a 6-color CI press with water-cooled drum, chambered doctor blades, PLC registration and automatic web guide, material waste fell from ~10% to <2.5% and setup time shortened from 45 to 15 minutes, yielding significant monthly film-cost savings.

Notes & pro tips

• Match anilox line count (LPI) to the ink and substrate: higher LPI for finer text and thinner ink films.
• Use chambered doctor blade systems with double-cycle ink pumps to minimize solvent loss and prevent ink skinning on long runs.

Technical specifications

• Product type: CI (central impression) flexo printing machine.
• Registration accuracy: ±0.15 mm.
• Mechanical maximum speed: up to 250 m/min; typical printing 50–200 m/min.
• Central impression drum with constant-temperature water cooling.
• Chambered doctor blade system with ink recirculation and automatic pumps.
• Drying tunnel with independent air inlet and exhaust fans.
• Frame: heavy, vibration-resistant construction.
• Controls: PLC quantitative registration and automatic web guide.
• Typical configurations: multi-color units (example: 6-color).
• Suitable substrates: PE, BOPP, PET, PVC films; kraft and paper products; aluminum foils; lightweight non-woven fabrics.