Patented rubber compounding machines and extruders described.

This 28-page, four-color brochure describes the company's patented rubber compounding machines and extruders, including Pinconvert extruders, Vac extruders, Multiplex extrusion lines, hot feed extruders, roller head lines, modular components, accessories, process control, test and development centers, customer service and more.

GE-SC Pinconvert extruders are said to combine the benefits of pin barrel extruders and transfer mix extruders. Depending on the size, they are equipped with a four- or eight-flight screw and a barrel liner featuring 12 or more flights. This design is said to result in high plasticizing performance so that the machine only needs one shear section. GE-KSL compact pin extruders are also described in the brochure.

GE-K cold-feed extruders are employed especially where the technical and economic benefits of pin barrel and Pinconvert extruders are not significant. Vac GE-K cold-feed extruders are used for the production of non-porous profiles, cords and flexible tubing, usually in continuous free vulcanizing lines. The barrel length, screw geometry, drive power, screw speed and the length of the vacuum zone are matched to the rubber compound, to its volatile components and moisture content. VAC GE-KS vacuum extruders are equipped with a pin barrel processing section.

Multiplex extrusion lines bring rationalization effects and quality benefits to tire component pre-assembly, according to the literature. Designed for duplex, triplex or quadruplex lines and having a number of patented features, they combine the tread components under high static pressure, with accurate dimensions and without air inclusions.

Berstorff USA

Circle 97 on card