TPT January 2011

T echnology U pdate

Zero contact but 100% accuracy

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

EFD Induction boosts Weldac

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.

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

EFD Induction – Norway Email: jil@efdgroup.net Website: www.efd-induction.com

  

                

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J anuary 2011

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