Coperion Werner and Pfleiderer

Fig. 10.1 Photograph and schematic representation of the modular screw-element sequences and barrel sections of an intermeshing, co-rotating TSE. [Courtesy of Coperion Werner and Pfleiderer Corp.]...

It has come to be realized that the Buss Kneader is an excellent distributive mixer and outstanding for mixing in glass fibers. In recent years. Buss AG and Werner and Pfleiderer were combined together in a new firm called Coperion. Reviews on the Kokneter have recently been written by Case [87] and White [88]. 

The extruder shown in Figs. 1.2 and 1.3 has been restored by Coperion Werner Pfleiderer and is on display. 

As a laboratory and trial machine, the machine shown in Figs. 1.2 and 1.3 has no guards in order to provide easy access and be readily convertible. In contrast, the machines sold by WP (then known as Werner Pfleiderer, but today called CWP, Coperion Werner Pfleiderer) were fully enclosed in the fashion of the day see Fig. 1.4 which shows two ZSK machines from the 1950s. Initially, WP also built the ZSK machines with a vertical screw arrangement, as the sectional drawing in Fig. 1.5 shows. The figure also shows that the actual processing section is very small in relation to the drive unit. At that time, the machine brochure promoted the oversized drive (with reliable operation as the benefit). 

Figure 4.19 Specific mechanical energy input for different volume- and torque-limited processes (according to Coperion Werner Pfleiderer)...

Coperion Werner Pfleiderer have a wealth of test and production experience related to degassing polymer melts with twin-screw extruders. Based on the process features described, the ZSK offers optimum solutions and can also be easily adapted for new tasks. The ZSK degassing machines also meet increasing quality requirements for polymers regarding residual degassing of solvents and monomers and the drive to save energy and raw materials in continuous manufacturing processes. 

This recently developed barrel-wear protection called Supermet 60 PLUS from Coperion Werner Pfleiderer (in conjunction with HARTEX and Bodycote) has improved the abrasive wear resistance by a factor of 3 compared to the pure matrix material, while retaining its effective corrosion resistance. This technology offers great potential for the manufacture of future special materials [4],... 

As the book contains contributions from several authors, readers are also offered a variety of viewpoints. I would like to take this opportunity to offer heartfelt thanks to all authors for their contributions. I would particularly like to thank Mrs. M. Strive of Carl Hanser Publishers and my colleague Mr. J. Hepperle for their invaluable assistance in the layout and editing. I would also like to thank Mr. W. Wiedmann of Coperion Werner Pfleiderer for the organisation of the CWP contributions and for being a major driving force behind the project. 

The machines mainly used for compounding plastics, chemicals and food are co-rotating, closely intermeshing twin-screw extruders. Some 30 000 such extruders are in use worldwide, about 1/3 are ZSK from Coperion Werner Pfleiderer, Stuttgart. In the chemical industry increasingly more and more batch mixers are being replaced by continuous twin-screw knea-ders. 

Coperion Werner Pfleiderer in different Process Technology functions for the mixing and compounding of mbber, chemicals, food and plastics... 

Coperion Werner Pfleiderer (2009) ZSK twin screw extruder (and personal communication with Dr. Paul Andersen), CTO, Coperion Werner Pfleiderer, Ramsey, NJ 2009. Brochure available at http //www.coperion.com/en/ compounding-extrusion / machines-systems/zsk-series/ (accessed 21 February 2011). 

Figure 6.9 Photograph of extruder, modular screw, and barrel sections of a Werner, Pfleiderer ZSK. Courtesy of Coperion Werner, Pfleiderer.

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