TPT January 2017

T E CHNOLOG Y

Twin screw extruder for masterbatch production

access to the processing section and easy cleaning. To prevent vibrations during operation, the STS Mc11 series has been equipped with a torsion-resistant base frame that supports smooth operation and increased reliability. Colour masterbatch processingmakes great demands on the compounding process. The pigment and additive parts must be mixed into the base polymer 100 per cent homogeneously to yield optimal product quality. Because of their mixing properties, an operating mode that conserves the product, and easy-clean properties, the co-rotating twin screw extruders from Coperion are claimed to be particularly suitable for this compounding task. The user-friendly CSpro basic control system has been used with Coperion ZSK high-performance extruders since 2010.

COPERION GmbH has introduced the STS Mc11 extruder, designed for masterbatch production. The twin screw extruder features a specific torque of 11.3Nm/cm 3 and has a series of improvements that include a new manifold with coaxial solenoid valves, improved heat covers, quick-release clamps for simple replacement of the feed hopper, and the CSpro basic control system. The company presented an STS Mc11 with a screw diameter of 35mm at its stand at the K 2016 trade fair. The model on display featured a die head specifically developed for masterbatch applications, and was equipped with a volumetric twin screw feeder from Coperion K-Tron. Coperion has equipped the STS Mc11 with a new manifold with coaxial solenoid valves. The heat covers have been revised in a way that enables easy

Photo credit: Coperion, Stuttgart, Germany

The STS Mc11 enhancements improve operating reliability and make working at the machine easier

In order to feed the pigments simply and precisely, the STS 35 Mc11 has been equipped with a T35 volumetric twin screw feeder from Coperion K-Tron. It yields feeding rates up to 2,500dm³/h, which are suitable for powder and materials that are sticky or difficult to feed. The feeder is mounted on a turntable above the gearbox for simple, flexible handling, easy accessibility and quick cleaning.

Coperion GmbH – Germany Fax: +49 711 897 3999 Email: info@coperion.com Website: www.coperion.com

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J ANUARY 2017