Twin-screw extruders | machinery feature
Compex who did not move over to Berstorff, and supplied spare parts for old machines, as well as occasional new machines. One of its customers was engineering plastics compounder Akro-Plastics, part of the Feddersen group. Feddersen then decided to put the production of the equipment on a fi rmer footing by establishing Feddem, and taking over those particular operations from Decroupet, whose main business is outside the plastics industry.
Elements of surprise Steer places a particular emphasis on the design of kneading blocks and the important role that they play in its compounding lines. The company’s global com- pounding technology head Robert Roden says that mixing attributes can be varied using typical Erd- menger-style two-lobe kneading blocks by varying the width and offset of the individual lobes; however, some degree of each of the mixing attributes of these elements is always present. Because of this, energy being consumed during mixing may not be delivering the desired response. Wide-lobed kneading blocks work well at providing a
high degree of shear, but some degree of kneading or distributive mixing is also occurring. Narrow-lobed elements are good for distributive mixing, but still possess some shearing effect. Reverse kneading blocks are effective at creating back-pressure to increase the degree of fi ll and residence time in a high mixing environment, but they also signifi cantly contribute to
FED-MTS
Feddem focuses on fl exibility with modules
that can used to increase the extruder’s length
Excellent product quality, especially with thermally sensitive compounds
The unique kneading block free screw geometry of the FED-MTS allows thorough and consistent mixing of the product without the occurrence of shear induced temperature spikes.
FEDDEM GmbH & Co. KG Member of the Feddersen Group
Sinzig – Germany
info@feddem.com www.feddem.com
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