PELLETISERS | MACHINERY
comprehensive process know-how, and technology that achieves the highest product quality and maximum economic efficiency.” Several years after its initial introduction, compounders are still finding new ways to harness the strengths of Farrel Pomini’s Continuous Mixer (FCM). Key features of continuous mixing technology include adjustable mixing intensity achieved by changing rotor speed and orifice position, and enhanced temperature control throughout the mixing chamber, rotors, and extruder barrel. The standard 6 L/D rotor provides a short residence time and low heat history which is especially important for processing temperature sensitive PVC. Rigid PVC is commonly used in construction
materials such as decking, rails, window frames, and pipe fittings. Unlike flexible or semi-rigid PVC, it does not contain plasticisers, making it more challenging to process. The traditional processing method involves mixing with batch or continuous compounding equipment finishing with a two-roll mill. Farrel Pomini says that utilising a mill has disadvantages, being difficult to operate and maintain, requiring a long set-up time, and having a large physical footprint.
Farrel Pomini’s rigid PVC solution involves compounding the virgin or recycled PVC with the FCM to a hot feed single screw extruder for pelletising. The compound cools as it is processed, while the newly designed Farrel Pomini Dry Face Pelletizer (DFP) minimises die pressure and potential temperature increases, and then efficiently cuts the pellet. After pelletising, an air transfer system completes the cooling process and carries out pellet classifying and dust/fines
Above: The Farrel Pomini Dry Face Pelletizer (DFP) minimises die pressure and potential temperature increases
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IMAGE: FARREL POMINI
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