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HOME > Product Information > KraussMaffei Berstorff rubber extruders

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KraussMaffei Berstorff rubber extruders

C-check

Higher-level quality assurance in tire production

- Unparalleled production reliability
- The perfect choice for maximum success in tire production

(Hannover September 3, 2018 )In today's tire industry, products must meet ever more stringent quality standards. That's exactly where the new C-Check 500 measuring system comes into play. With this development, the KraussMaffei Berstorff design engineers have succeeded once again in setting challenging standards: the C-Check system allows the conductivity of chimney strips to be checked directly after the extrusion process by non-contact measurement. Off- spec batches can thus be detected during the production process to minimize scrap. In case lack of conductivity is detected in the vulcanized tire the complete tire needs to be scrapped. A non conductive component however can be re-used in the virgin compound and this will lead to tremendous costs-savings. Recipe-controlled positioning, combined with automatic height adjustment of the test system, ensures uncompromising flexibility and excellent precision.

To reduce the rolling resistance of passenger car and truck tires, tire producers often replace carbon black by silica in their rubber compounds used in tread production. Silica is characterized by high electric resistance and acts as an isolator. For this reason, a continuous conductive strip (chimney) on carbon black basis is additionally required in the tread profile to eliminate the electrostatic charge from the tire. The chimney strip has a width of a few millimetres only and avoids electrostatic charging produced by the contact with the road surface.

Calender systems
  • new

High-performance calendering solutions for sustainable process optimization

Calender technology from KraussMaffei Berstorff enables two-sided coating of textile cord or steel cord with rubber. The rubberized textile cord replaces the hose and lends the tire its load-carrying capacity. The steel cord guarantees high driving stability and high running performance.

With the S model KraussMaffei Berstorff provides comprehensive solutions for coating. The calender systems are customer-specifically equipped with 4 rolls. The modular structure and various additional features stand for the highest flexibility and productivity.

Data Material download

Strip-Winding type roll manufacturing device

Strip winding is a production method used in a wide range of applications, especially suitable for the forming of rolls with large diameters and lengths.
This roll production system is used throughout the world for rolls in the steel industry and paper production.
Homogenous strips are output from the die thanks to extruder technology accumulated over many years, helping to provide unmatched quality.

"COVERMATIC" series roll manufacturing device

Rolls made by the COVERMATIC series satisfy the highest quality demands of contemporary printing and coating applications.
Capable of processing rubber compounds with Mooney viscosities ranging 20 to 110.
Capable of covering core diameters of 5 to 310 mm(Diameter), with rubber compounds in thicknesses between 3 and 40mm, regardless of the core's length, and without leaving any overlaps or seam lines.

"MULTIPLEX" system (multilayer extruders) for tire parts

One of the the largest systems in the world in terms of output capability.
Using four extruders or more, different types of rubber compounds can be precisely extruded from the head, free of any intake of air.
Complicated cross sections, such as designs incorporating chimneys, can be extruded smoothly.
Extruders that output up to six layers (Hexaplex) have been delivered.