Canadian Plastics

EXTRUSION (September 01, 2008)

KraussMaffei has improved its Multiplex extrusion lines to allow the processing of newly developed compounds or to meet the more exacting requirements of profile geometry precision.

September 1, 2008   Canadian Plastics



KraussMaffei has improved its Multiplex extrusion lines to allow the processing of newly developed compounds or to meet the more exacting requirements of profile geometry precision.

The hot-feed extruders integrated into Multiplex extrusion lines are particularly suited for processing rubber compounds with a high natural rubber share at high output rates, good process stability and minor output pulsations. The optimised feed section, with separately driven feed roll, ensures smooth intake of the preheated rubber strip. Uniform rubber feeding combined with tailored screw geometries offers a constant high filling level, ensuring maximum output rates and pulsation-free operation.

The company has integrated a special loop system into the Multiplex extrusion line control solution to perform two different tasks. First, this system comprises a material accumulator to ensure uniform material feeding from the preheating unit to the extruder. Material variations in the preheating section or screw speed changes caused by modified profile dimensions or compounds are automatically compensated. Second, the loop system allows the cooling section and thus the stock temperature to be modified — if required for process-engineering reasons — in order to obtain improved rubber homogeneity during the extrusion process.

The product portfolio comprises eight different extruder sizes designed for the most diverse process tasks with screw diameters ranging between 60 and 350 mm and maximum output rates of 120 to 7000 kg per hour.

KraussMaffei Corp. (Florence, Ky.);

www.kraussmaffei.com;859-283-0200


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