Three-layer blown-film co-extrusion line

Macchi Coex flex 3

Material type: LDPE, LLDPE, mLLDPE, HDPE, PP, regranulate
Machine dimensions (LxWxH): 16 X 5 X 10.5 m
Min/Max final Film width: 900 / 1700 mm
Film thickness: 27–200 µm
Capacity: Up to 240 kg/h
Line speed: 0–150 m/min
Screw diameter: 55/65/55
Layer ratio: Up to 25/50/25 %
L/D ratio: 30/1
Number of heating zones: 3 for 55 mm and 4 for 65 mm (1 zone per screen)
Dosing system: Doteco Grado; 3 units with 4 components each; centralized vacuum pump (added later); all scales fully serviced last year; new software and external touch screen; neck (before extruder) with additional magnets
Electronics: Siemens, ABB
Software: Macchi’s; full control via touch screen (replaced 3–4 years ago)
Die head with IBC: 280 mm; 2.4 mm gap (3 heating zones); TE502 model with air ring extension
Internal cooling balloon diameter control (IBC) Ultrasonic sensor (1 unit); JET internal cooling system
Air ring: Karat, with 3 air inlets, 45 segments (valves), with integrated thickness control
Air ring blower: YES
Thermoregulation chiller: YES (Eurochiller)
Bubble cage: YES; rollers with silicone cover; motorized electronic control; secondary cage with motorized open/close and adjustment
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Thickness control: K design (Karat, Kundig K-150); contact system integrated with air ring
Collapsing frame: Free aluminum rollers
Rotation: Nip roller 1800 mm (max film width 1700 mm); motorized open/close; speed control motor; other free rollers in aluminum; 2 ceramic air rollers for cooling
Water-cooled rollers after nip roller: /
Film centering: 2 ultrasonic sensors (Five)
Corona treatment (double-sided): YES (F&B); above winders; 8 kW generator; ozone extractor and film detector; 10 mm electrode width
Winders: Back-to-bac
Winder model: Model BO; nip roller 1800 mm (max film width 1700 mm); manual shaft placement; max roll diameter 1000 mm; trim and multiple output rolls; film tension and winding control; 2 banana rollers; ‘flying knife’ (new Origa knife installed a few years ago); electric panel included
Shafts: 4 x 76 mm and 4 x 152 mm
Trim suction: YES; includes Supergrillo regranulation system
Frame construction: YES
Installed power: Approx. 150–200 kW (400 V, 3-phase