EuroWire Sept 2015

News Technology

Conductor preheater with integrated temperature measurement and control

The controlling module of the Preheater 6000 TC continuously adjusts the power of the preheating with the result that the wire always has the nominal temperature, independently of conductor material, the dimensions of the conductor and the line speed. No further setting is necessary. LED displays directly on the Preheater 6000 TC show the measured temperature at different perspectives. The integrated, non-contact temperature control makes the Preheater 6000 TC unique. It is available for temperatures up to 250°C, for a product diameter of 0.32 to 4.5mm (0.08 to 16mm²) and for a line speed of up to 2,500m/min. Three device models are available for the power range of 10, 20 and 30 kW. A power calculator at www.sikora.net/powercalc helps choose the optimal device. The Sikora temperature measuring system is also available as the stand-alone system Wire-Temp 6000. Sikora AG – Germany Website : www.sikora.net

Manufacturers of cables, specifically automotive and data cables, require a reliable conductor preheating, to ensure an optimum adhesion of the insulation on the wire, and a controlled foaming. With the Preheater 6000 TC (temperature controlled) Sikora has an advanced solution for precise conductor preheating, the basis for high-quality cable production and repeatable control of the production. In only a few applications, it may be sufficient to control the output power of a conductor preheating device only depending on the conductor size and type, the line speed and the required temperature. However, there are numerous influences on the accuracy of the conductor temperature, such as the ambient temperature, the initial temperature of the conductor and particularly the development of the temperature of the wire guiding short-circuit wheel within the first ten to 20 minutes after starting the production or after an interruption of the production. The Preheater 6000 TC is positioned before the extruder and inductively heats

▲ ▲ Conductor preheater with integrated temperature measurement and control

the conductor to the desired nominal value. The integrated IR camera ensures a non-contact measurement of the wire temperature at the output of the preheating device.

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September 2015