TPT January 2011

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January 2011 59 ›
Technology Update
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WITH the ULTRATEMP 6000 SIKORA has
for the first time developed a temperature
measuring system, which precisely measures
the melt of plastic materials in the hose and
tube extrusion on a non-contact and non-
invasive basis during the production.
The measuring device works with
ultrasonic technology. It consists of an
adapter, which is installed between the
extruder screw and the cross head. In
the adapter there is a high temperature-
resistant ultrasonic transmitter as well as
an ultrasonic receiver on the opposite side
of the flow channel. The ultrasonic signal
is sent through the complete cross section
of the melt flow. Thus the average melt
temperature is determined in real time.
One of the characteristic features of
the ULTRATEMP 6000 is the non-contact
measuring principle. It guarantees that the
flow characteristics of the melt are not
influenced and early cross-linking of the
melt is avoided. Ambers or scorches that
can be caused by early cross-linking belong
to the past. Melt shear heating effects do
not occur. An additional highlight is the
extremely high measuring rate. It ensures a
fast response time and defines the smallest
temperature changes. Besides temperature
measurement the ULTRATEMP 6000
detects inhomogeneities in the melt. “The
ULTRATEMP 6000 sets an exclamation
mark with regard to reliability and efficiency”,
says Harry Prunk, CEO SIKORA AG. “It
fulfils all requirements that are requested
for a temperature measuring system in
extrusion lines,” says Mr Prunk.
Sikora AG – Germany
Fax: +49 421 4890090
Email:
Website:
Zero contact but 100% accuracy
NEARLY 10 years of successful use of a
patented switching technology has proven
the reliability of EFD Induction’s Weldac
IGBT welder. Refinement of existing
technology has improved and extended
the use of readily available, reliable and
standard IGBT transistors up to 500 kHz.
The improvements have led to even
lower stress and power loss in the transistors
and the inverter module across the whole
frequency range used for tube and pipe
welding. In fact, the Weldac has proven
so reliable, EFD Induction warrants the
welders’ IGBT inverter modules and driver
cards for a total of five years of operation.
EFD Induction is a leading induction
heating company for industrial applications.
The company has manufacturing plants,
workshops and service centres in the
Americas, Europe and Asia. Corporate
headquarters are in Skien, Norway.
EFD Induction – Norway
Email:
Website:
EFD Induction boosts Weldac