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Windmoller & Holscher, Varex, 2002, 5 Layers, 2100mm Film Width

Windmoller & Holscher, Varex, 2002, 5 Layers, 2100mm Film Width

Description

  1. Overview
    1. Windmöller & Hölscher Varex blown film line
    2. Machine code: EX744
    3. Year: 2002
    4. 5 layers, film width 2100 mm
    5. Film structure: ABCDE
    6. Materials: barrier and lamination film, LDPE films
  2. Extruders
    1. Extruder 1 (layer A): screw diameter 70 mm, motor 89 kW, gravimetric doser 5 comp
    2. Extruder 2 (layer B): screw diameter 50 mm, motor 29 kW, gravimetric doser 1 comp
    3. Extruder 3 (layer C): screw diameter 60 mm, motor 89 kW, gravimetric doser 3 comp
    4. Extruder 4 (layer D): screw diameter 50 mm, motor 29 kW, gravimetric doser 1 comp
    5. Extruder 5 (layer E): screw diameter 70 mm, motor 89 kW, gravimetric doser 5 comp
  3. Head and Die
    1. Die diameter: 500 mm, gap 1.25 mm and 2.25 mm
    2. IBC (internal bubble cooling)
    3. Optifil P2 automatic thickness profile control
    4. Auto width control via 3 ultrasonic sensors mounted on bubble cage
  4. Thickness Control System
    1. Two thickness gauges: gauge A (beta control) and gauge B
    2. Electronic system model Hiscan, year 2009, for measuring thickness of overall film and of EVOH layer
    3. Automatic thickness control Optifil P2
  5. Downstream Equipment
    1. Bubble cage: motorized position, rotating
    2. Take-off unit: rotating
    3. Double corona treatment
    4. Rewinder type: double back to back
    5. Rewinder max reel diameter: 1200 mm
    6. Rewinder description: surface or gap winding
    7. Reel unwinding and shaft extraction system
    8. 3” and 6” shafts
  6. Condition and Upgrades
    1. Overhaul/renovation: HMI, supervision and some inverters upgraded in 2019