Extrusion 3-2016

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31 Extrusion 3/2016
special antiabrasion treatment to process
properly the glass fibres or the mineral
filler.
The production changeover, according to
the chosen diameter, is very quick be-
cause the whole re-tooling concept is de-
vised to minimize times and manual ope-
rator intervention.
The gauging measurement system con-
tinuously controls all the parameters dur-
ing the production process to ensure a
top quality pipes. The software manages
the different recipes.
The line has a range of diameters from
16 to 200 mm, with SDR 6–11, and
the new design 3-layer co-extrusion
head allows a configuration A-B-A or A-
B-C with external coloured stripes.
Main Technical Features:
The co-extrusion line configuration con-
sists of four extruders:
• EA60 Single Screw Extruder - (A) Inter-
nal/External Layer
• EA75 Single Screw Extruder - (B)
Middle Layer (Glass Fibres/Mineral Filler)
• EA60 Single Screw Extruder - (C) Exter-
nal Layer
• EA20 Single Screw Extruder - External
Coloured Stripes
The extruders are fed by gravimetric sys-
tem for a better control of the output
and each screw and barrel undergo a
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