Extrusion for strip winding
As for OTR tire retreading, strip winding 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 therefore the VMI extrusion systems for this purpose include a gear pump in conjunction with a single screw extruder.
VMI offers dedicated extruder gear pump systems that meet the output requirements for this type of application while the customer takes care of further system integration. The linear and predictable output of the gear pump enables easy integration.
The machine process section can feature a swing frame design for the single screw extruder so that the extruder can be quickly and easily pivoted away from the gear pump inlet to allow cleaning of the compound and complete empty run of the extruder screw. The extruder is in that configuration connected to the gear pump inlet by a manually operated lever clamp for quick release.