TPT May 2016

28 / 80

26 May 2016
T E CHNOLOG Y
Online and offline analysis of
pellets and flakes
SIKORA has released several new
models of its Purity Concept systems,
which are used for the online and
offline inspection and analysis of plastic
material. The systems are equipped with
X-ray technology, infrared technology
or optical sensors and can be used for
samples during the production process in
order to find impurities from 50μm.
Of particular interest are the new
systems for the manufacture of medical
hosing. An essential factor for hoses
used in the medical field is the purity of
all materials to ensure the highest quality
for the demanding range of applications
the hose will be used in.
Sensitive end products require a
similar reliable control and processing
of the raw materials. The transport of
the plastic pellets, which are usually
transported in large tanker lorries and
stored in a silo at the plant, shows some
obvious weak points for contamination.
For example, the discharge from the
transport vehicle to the silo offers
potential contamination from dust or
other impurities. Until now only small
samples have been checked manually
before the material
is processed. But
even with the utmost
care there might be
contamination, which
cannot be seen by
the human eye –
metallic and organic
contamination inside
the pellets/flakes from
50μm.
Therefore, Sikora
recommends the usage
of a Purity Concept
device for inspection and analysis with
optical sensors for transparent pellets/
flakes and X-ray technology for black
pellets/flakes for instance. this is the
only way for incoming goods inspections
to ensure that the raw material already
has the desired quality needed for the
end product.
During the processing of high-quality
and, therefore, high-priced XLPE
materials, it is often not enough to rely
only on sample tests. Here it is useful to
integrateonlineanalysis in theproduction
process. For a low throughput of up
to 50kg per hour – which is common
during the extrusion of medical hoses,
for example – Sikora offers the Purity
Concept System with conveyor belt that
can easily be integrated in existing lines.
Depending on the model, the device
inspects pellets and flakes with optical
sensors or by using X-ray technology
for contamination from 50μm before the
material enters the extruder.
Sikora AG – Germany
Email:
Website:
Purity Concept X for sample analysis
100kHz induction dryer for
steel strip coating
aJaX tocco Magnethermic has ship-
ped a 1,900kW, 100,000Hz induction
heating dryer system to a steel strip
galvanising producer in China, for the
drying of coatings including passivation,
with and without chrome products, and
organics.
the high-powered induction dryer is
designed to heat steel strip from 0.4 to
2.5mm thick, and 800 to 1,676mm wide,
at a rate of 220m/min, or 116 metric
tons/hour. The equipment will provide a
temperature rise of 90°C.
The system is designed as a single,
unitised package assembly that includes
the frequency converter, capacitor
cabinet and single turn heating coil.
The project also included the interface
i/o, heating control model, and water-
cooling system. The installer puts the
system in place and only
connects power, water and
control to the respective
takeover points, minimising
on-site installation time.
Such equipment can
be packaged and used
in several areas of a strip
heating line, including
galvanising.
ajax tocco has provided high-
powered systems with frequencies
ranging from 3,000 to 450,000Hz
for heating strip, depending on the
customers’ requirements.
Ajax Tocco Magnethermic Corp –
USA
Fax: +1 330 372 8608
Email:
Website:
Single unitised assembly
to locate in place
Coil opening