QUALITY MANAGEMENT

In research cooperation with the machine manufacturer Maillefer Extrusion Oy/Finland, the Bremen/Germany based Sikora AG has developed the new temperature measuring system Ultratemp 6000*. The measuring device, based on ultrasonic technology, is specifically designed for the measurement of XLPE melts.

Innovative technology for a new level of quality and productivity

Until now, conventional methods are used to measure the melt temperature such as contact thermocouple sensors. More often even simple hand-held meters are utilized to measure the melt temperature after the cross-head before starting up the extrusion line. These techniques do not offer reliable measuring results as they are contact measurements with a relative slow response time. Moreover, they can influence the melt flow properties which may result in cross-linking. Sikora’s Ultratemp 6000* is a non-contact melt temperature measurement system based on non-invasive ultrasonic technology. It precisely measures the melt temperature during production and does not influence the melt flow properties. With the use of Ultratemp 6000* melt shear heating errors are eliminated. It ensures homogeneous melt viscosity for the extrusion process and helps to avoid premature cross-linking after screens, which may lead to ambers and scorches in the polyethylene material. Sikora’s temperature measurement system optimizes the running time and the productivity of the extrusion line.

A unique concept

The measuring technology of Ultratemp 6000* is based on precise high-temperature ultrasonic sensors. The adapter of the system including the ultrasonic sensors is positioned in the flow channel between extruder and cross-head. In contrast to conventional methods, the ultrasonic sensors do not influence the polyethylene melt flow, because the sensors are at the outside of the flow channel. In consequence, the extrusion process is not affected by the sensors, even if they have to be exchanged. The extremely high measuring rate allows a fast response time as well as the registration of small temperature variations. Hence, Ultratemp 6000* is an efficient partner in the wire and cable production. This system supplies an important step for further process optimization and costs reduction.

Perfect combination

In all production lines Ultratemp 6000* can be combined with the display and control systems Ecocontrol 600, 1000 and 2000 ensuring an efficient production control. The processor systems display numeric and graphical process information along with analysis tool such as trending and statistical process control analysis. The Ecocontrol models offer continuous monitoring of the measured values. Alternatively, Ultratemp 6000* can be delivered with a Profibus-DP interface.
* Patent pending

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