Engineered for high-speed printing on low-tension PE films, the central impression (CI) flexo press delivers accurate color-to-color registration on extensible substrates. The PE CI flexo printing machine handles LDPE, HDPE, and biodegradable films with consistent repeatability across long production runs. Built for converters that run thin-gauge polyethylene, the press combines heavy-duty construction with quick job changeover for short and long runs alike.
The central impression drum provides a stable printing foundation, minimizing film distortion and register drift. A precision helical gear train and ceramic anilox rollers support fine vignettes, solid blocks, and line work at speeds up to 180 m/min. Plate cylinders and anilox sleeves are designed for tool-less changeover, cutting job setup time significantly. The result is repeatable print quality on extensible films that challenge conventional stack presses.
| Parameter | Specification |
|---|---|
| Printable substrate | LDPE, HDPE, PE film, breathable film, biodegradable film |
| Max mechanical speed | 180 m/min |
| Max printing speed | 150 m/min (depending on ink and substrate) |
| Color stations | 4 / 6 / 8 colors |
| Printing width | 800–1400 mm |
| Repeat length | 300–850 mm |
| Registration accuracy | ±0.10 mm |
| Anilox roller | Ceramic-coated, laser engraved, 100–1200 LPI |
| Drying system | Hot air, infrared, or combination |
| Unwind/rewind diameter | 600 mm / 800 mm (optional 1000 mm) |
| Tension control | Closed-loop AC vector drive, load cell feedback |
| Main drive power | 18.5–30 kW depending on web width |
| Machine dimensions (L×W×H) | 5.8 m × 2.6 m × 2.9 m for 6-color 1000 mm |
The PE CI flexo printing machine supports both water-based and solvent-based ink systems. Each color station includes an independent drying hood with adjustable air volume and temperature. Air channels are designed to prevent solvent retention and reduce energy consumption. An optional corona treater can be installed before the first print unit to improve ink adhesion on untreated polyethylene. Drying capacity is engineered to keep pace with the machine at full printing speed, even with high-coverage designs.
Extensible films demand precise tension management. The machine uses closed-loop tension zones at unwind, infeed, printing, and rewind. Load cells and floating rollers provide real-time feedback to the PLC. Automatic register control, with electric register motors on each print deck, maintains ±0.10 mm accuracy even during acceleration and deceleration. Taper tension control prevents telescoping on high-speed rewinds.
Quick-change systems for plate cylinders and anilox sleeves are standard. An optional trolley system allows offline preparation of the next job while the press is running. Plate cylinder sleeves with pneumatic locking reduce make-ready time from hours to under 30 minutes for full color changes. This quick-change architecture is particularly valuable for converters running multiple SKUs or short promotional runs.
The press frame is built from stress-relieved steel with precision-machined mating surfaces. The central impression drum is dynamically balanced and hard chrome plated for long service life. Heavy-duty cylindrical roller bearings support the drum and plate cylinders. Centralized lubrication points reduce maintenance time. Enclosures with interlocked safety doors keep operator exposure to moving parts at a minimum, and emergency stop stations are located on both operator and drive sides.
Siemens PLC and AC vector drives are standard, providing synchronous speed control across all print stations. The touchscreen operator interface allows recipe storage, job recall, and real-time monitoring of tension, speed, and dryer temperature. Remote diagnostics are available through a secure Ethernet connection, reducing downtime for troubleshooting. The machine is supplied with CE-compliant electrical panels and can be configured for UL or CSA requirements.
| Optional Feature | Description |
|---|---|
| Corona treater | In-line surface treatment for untreated PE film |
| Video inspection | Real-time print defect detection and recording |
| Viscosity control | Automatic ink viscosity monitoring and adjustment |
| Chilled drum | Temperature-controlled CI drum for heat-sensitive films |
| Web cleaning | Contact cleaner before the first print station |
| Unwind/rewind turret | Non-stop roll change for high-volume converters |
This PE CI flexo press is widely used for printed PE film in household products, food packaging, agricultural film, diaper back sheets, and industrial liners. The robust central impression drum design is especially suited for thin-gauge films from 20 to 120 microns. With the right combination of drying and tension settings, the machine also handles transparent PE with low hot-tack and high slip additives.
