TPT January 2017

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40 JANUARY 2017
T E CHNOLOG Y
Twin screw extruder for
masterbatch production
COPERION GmbH has introduced
the STS Mc11 extruder, designed
for masterbatch production. The twin
screw extruder features a specific
torque of 11.3Nm/cm3 and has a series
of improvements that include a new
manifold with coaxial solenoid valves,
improved heat covers, quick-release
clamps for simple replacement of the
feed hopper, and the CSpro basic
control system.
The company presented an STS
Mc11 with a screw diameter of 35mm at
its stand at the K 2016 trade fair. The
model on display featured a die head
specifically developed for masterbatch
applications, and was equipped with
a volumetric twin screw feeder from
Coperion K-Tron.
Coperion has equipped the STS
Mc11 with a new manifold with coaxial
solenoid valves. The heat covers have
been revised in a way that enables easy
access to the processing section
and easy cleaning. To prevent
vibrations during operation,
the STS Mc11 series has been
equipped with a torsion-resistant
base frame that supports smooth
operation and increased reliability.
Colour masterbatch processingmakes
great demands on the compounding
process. The pigment and additive parts
must be mixed into the base polymer
100 per cent homogeneously to yield
optimal product quality. Because of
their mixing properties, an operating
mode that conserves the product, and
easy-clean properties, the co-rotating
twin screw extruders from Coperion are
claimed to be particularly suitable for
this compounding task.
The user-friendly CSpro basic control
system has been used with Coperion
ZSK high-performance extruders since
2010.
In order to feed the pigments simply
and precisely, the STS 35 Mc11 has
been equipped with a T35 volumetric
twin screw feeder from Coperion K-Tron.
It yields feeding rates up to 2,500dm³/h,
which are suitable for powder and
materials that are sticky or difficult
to feed. The feeder is mounted on a
turntable above the gearbox for simple,
flexible handling, easy accessibility and
quick cleaning.
Coperion GmbH – Germany
Fax: +49 711 897 3999
Email:
Website:
The STS Mc11 enhancements improve operating
reliability and make working at the machine easier
Photo credit: Coperion,Stuttgart, Germany