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Macchi E-17 3 Layers / 1700 mm

General Technical Description:
The Macchi 3-Layers is a three-layer blown film co-extrusion line designed for the production of high-quality tubing and sheeting films. The line is capable of processing LLDPE, LDPE, mLLDPE, MDPE, and HDPE. Film production utilizes an upward bubble-up working principle. The machine is equipped with a 350 mm 3-layer die head and delivers an output capacity of up to 450 kg/hour.

EXTRUSION GROUP:
Extruders: 65 mm + 80 mm + 65 mm
• Infrared heating zones
• Hydraulic screen changers
The Coexflex Size 3 extrusion group includes:
– Two high-performance extruders 65/30D (layers A and C)
– One high-performance extruder 80/30D (layer B)
– Bimetallic barrels
– Nitrided, high-mixing screws
– Water-cooled grooved feed sections
– AC motors with digital frequency converters (74 kW for 65 mm, 100 kW for 80 mm)

DIE HEAD:
• Model TE502
• 350 mm diameter, die gap 1.8 mm
• IBC (Internal Bubble Cooling)
• Electroless nickel-plated flow channels
• 4+4 ceramic heating zones
• Mounted on a die cart with integrated air distribution manifold

COOLING SYSTEM:
• Dual-lip Plast-Control air ring
• Coexflex version includes Double Flux Cooling Ring ASR3, with inverter-driven blower and interchangeable inserts

TAKE-OFF UNIT:
• Take-off width: 1800 mm
• Oscillating nips
• Side gusseting capability

WINDING SECTION:
• Double automatic back-to-back winder
• Fully automatic roll change
• Maximum winding width: 1750 mm
• Cardboard core diameter: 76 mm

FILM SPECIFICATIONS:
Film widths achievable with 350–400 mm die: 1300–1700 mm
Thickness range: 18–200 μm
Output example (Coexflex specs): 1600 mm width, 100 μm LDPE → 400 kg/h

LINE SPECIFICATIONS:
• Total line height: 10 m
• Mechanical winder speed: 7–110 m/min
• Installed electrical power: 320 kW, 415 V, 3-phase + neutral
• Cooling water consumption: 6 L/min
• Compressed air requirement: 6 bar

AUXILIARY EQUIPMENT:
• Tower
• E+L web guiding system
• Piovan gravimetric weight control
• Piovan Quantum dosing units
• Plast-Control automatic thickness control
• Calibrating basket
• Corona treater (Ferrarini & Benelli)
• FBF cold-needle micro-perforation
• Air shafts (8 pcs)
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