5 layers MACRO Eng. film blowing machine

In a blown film extruder PE granulates (or other polymer) are melted in an extruder and pushed through a circular die extruding a tube of molten polymer. Tube is then inflated to multiples of its initial diameter and cooled to form a thin film. Bobble is later collapsed and re-winded.

Machine Code EX638
Manufacturer MACRO Eng.
Year 2002
Number of layers 5
Overhaul/renovation 2011
Film structure A-B-C-D-E 30-200my
Material LDPE, LLDPE, PA, EVOH, PP, coex tie resins
Film Width (mm) 1500
Output (Kg/h) 250
Extruder 1 Layer ref: A
Screw diam 63
Extruder 2 Layer ref: B
Screw diam 44
Extruder 3 Layer ref: C
Screw diam 63
Extruder 4 Layer ref: D
Screw diam 44
Extruder 5 Layer ref: E
Screw diam 63
Head description 5 layer with IBC
Die diam (mm) 350
Thickness controll system Yes x-rays SYSMETRIC
Take off unit Rotating
Corona treatment Yes
Web guide Yes E&L
Rewinder max reel diameter 1000
Rewinder description In line slitting
Additional information Gravimetric system Plastcontrol brand. 2 components for 1,2,4,5, extruders and 1 for extruder 3. In 2011 the head and all screws were replaced, System Scada and Thorpe added by Macro, control panel and drivers replaced. Kundig gauge measuring system added instead of old Plastcontrol.

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