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J

anuary

2011

59

T

echnology

U

pdate

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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:

sales@sikora.net

Website:

www.sikora.net

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:

jil@efdgroup.net

Website:

www.efd-induction.com

EFD Induction boosts Weldac