Precision of the extrusion product is an important requirement in many extrusion applications. VMIs extruder gear pump systems combine the plasticization of an extruder with the accurate, high pressure volumetric output of a gear pump. You control compound plasticization and output pressure independently to ensure high accuracy and output, while preventing scorching.
Flexible in a wide variety of applications
High accuracy output
Reduction of extrusion tolerances
Excellent process control
Lower scrap rate
VMI is specialized in integrated extruder gear pump systems, where the extruder takes care of plasticizing the rubber compound and feeding the material into the gear pump. The gear pump ensures the accurate and continuous output, also in the case of high output pressures.
Extrusion strip winding is important for OTR tire retreading and has also become important for new tire production systems, to build up full rubber tire components by winding a small rubber strip delivered by an extrusion system. Such applications require strip extrusion with very high accuracy and high output pressure. Therefore VMI extrusion systems include a gear pump in conjunction with a single screw extruder.
The VMI Planetruder is very suitable for continuous and accurate feeding of rubber into a TPE/TPV compounding extruder. The planetary gear pump ensures a feeding precision higher than ±0.25%. The single-drive, compact design allows for easy installation and takes up little floor space.
VMI Extruder gear pump systems are used for final mixing (iCOM technology) or for proportional blending of rubber compounds. The system provides you a high quality output, while saving costs on equipment investment and on energy use.
VMI developed the RETRAX retreading system to answer to our customers needs of the present and the future. The RETRAX employs the renowned cushion gum extrusion-smearing technology. This technology is used by a majority of bus- and truck tire retreaders in the USA and Europe.
Uniform filling by extrusion-smearing technology
Save cushion gum costs by using single size feed strip
About 1600 VMI people around the world continuously work on high tech, innovative solutions to make your company more successful. Since its foundation in 1945, VMI has expanded into a modern company with eight facilities on four continents, providing proven, reliable equipment, services and solutions.
VMIs headquarters based in Epe, the Netherlands, employs about 900 people. Through experienced and highly skilled people and an ambitious and enterprising management team, VMI is acknowledged as a respected market leader offering innovative machinery that is continuously developed and further enhanced.