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Gear pump Systems

The VMI-AZ COMBEX EXTRUDER is a cold feed extruder - gear pump system. It is optimized for processing a wide range of rubber compounds used for:
  • Precision blank manufacturing
  • Profile extrusion
  • Pelletizing
  • Straining applications
  • Feeding of calendars or moulds
  • Silicone extrusion

The volumetric operating gear pump delivers a very precise output of ± 0.4%. This allows the Combex system to produce highly accurate rubber preforms with cutting provided by a fully integrated and servo-driven knife.

Combex Systems for rubber preform
The typical preformer types are the VMI-AZ Combex 45, Combex 60, Combex 90 and the Combex 120.

Combex Systems for straining applications
The typical strainer types are the VMI-AZ Combex 120 and the VMI-AZ Combex 150, with the specific size based on the mill room output requirements. The VMI-AZ Combex strainer systems are also in operation for high output silicone-rubber applications.

To meet customer’s output requirements, the VMI-AZ Combex systems are offered in different sizes:


  Type Screw Ø Output kg/h
  COMBEX 45 45 mm 60 kg/h
  COMBEX 60 70 mm 200 kg/h
  COMBEX 90 90 mm 500 kg/h
  COMBEX 120 (RV-AZ-90) 120 mm 1000 kg/h
  COMBEX 120 (RB-AZ-110) 120 mm 1250 kg/h
  COMBEX 150 (RB-AZ-140) 150 mm 2500 kg/h
  COMBEX 150 (RB-AZ-180) 150 mm 3700 kg/h

Note: the output is dependent on the compound



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Combex schematic

Combex 60 special

Combex 60 special preformer

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Combex 90 standard system preformer

VMI Group

VMI-Logo

Production Location

Bahnhofstrasse 6
93486 Runding - Germany
Phone +49 9971 76 13 90

North American sales Office

4670 Allen Road
Stow. OH 44224 USA
Phone +1 330 929 08 15