XLPE Peroxide cross-linked Compounds:ModelSKW-100SKW-125Screw
Diamenter105125RPM600600Reference Output500-800800-1500
Polyethylenes (PE) have outstandingly good insulation properties. A
temporary temperature rise, e.g. due to peak loading, can however
cause a complete breakdown of PE cable insulation. The relatively
low softening or melting point leads to thermo-mechanical failure
or even dripping of the Insulation. Cross-linked polyethylene (PEX)
is more thermosetting than thermoplastic. It can therefore be used
at significantly higher operating temperatures, is mechanically
stronger, more resistant to organic liquids, and often enables
thinner wall thicknesses. Various cross-linking methods are
used.The basic formula of peroxide cross-linked XLPE includes PE
and peroxide. The peroxide liquid can be injected to co-kneader
from hollow pins, which provides a free adaptation in barrel
position and high outstanding mixing effect due to peroxide
injected to polymer directly. The co-kneader has mild shearing
to the whole process, and an easy switch-over is realized. SJW
XINDA Type Cascade Three Flights Co-Kneader Compound Extruder
for XLPE Peroxide cross-linked CompoundsThe XINDA SJW Three
flights compouding system,each spiral is broken by 3 gaps per
revolution to locate the kneading flights, 3 rows of kneading
pins,which are individually inserted in the barrel per 120
degree. The reciprocating wobble-box synchronizes the shaft
rotation and oscillation so that each revolution of the screw is
accompanied by one full stroke forward and backwards.This ensures
optimal distributive and dispersive mixing with minimal energy
consumption. Advantages of the XINDA Co-kneaderThe
Co-Kneader, a mild-shear rotating and reciprocating single-screw
extruder, is designed for shear and temperature sensitive
compounds. The flights on the screw are interrupted and interqct
with three rows of stationarv kneadina pins located in the barrel
wall. The interaction between the moving flights and the stationary
pins provide dispersive and distributive mixing simultaneously.
Axially opened split barrel guarantees ease of cleaning. Those
splined, segmented screw elements and pins can be changed easily
according to different processing techniques. In addition, some
pins are hollow inside, thermocouples can be inserted to get the
accu- rate temperature of the materials inside the barrels, so as
to liquid additives injection. Different from other extruders, the
kneading process is achieved radially and axially at the same time.
All in all, Co-Kneader has outstanding kneading, mixing efficiency
and high degree of self-wiping. It is the most suitable for
compounding purposes.Cascade two-stage co-kneader system for XLPE
Peroxide cross-linked Compounds Compounding: Co-kneader and
discharging extruder build up two stage compounding system.
Advantage of the compounding system:--Lower energy input,
lower melt temperatures--Extremely homogeneous mixing, no shear
spikes, equal treatment of polymer matrix--High degree of
self-wiping and have no dead spot--Dispersive mixing without
destroying delicate fllers--High volumetric loadings of fllers and
additives--Efficient blending of liquid components--Broad
application for compounding without changing hardware--Axially
opened split barrel guarantees ease of cleaning and fast
maintenance--Replacement parts, such as screws, barrel lining and
pins can be changed individually XLPE peroxide
cross-linked Compounds:
--For 35KVA cables
Details Images /*
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