The torque fluctuation disappeared and the feed rate was increased to over 1600kg/hour, although capacity restrictions on the downstream equipment meant that 1560 kg/hour was the optimum rate.
In the USA trials with two 65mm machines saw output rise by 275%. The test machine was a new MPX65, fitted with a MAX³ feed port and screw configuration. The other is an original MP65 with the same power and speed but without MAX³ or additional cooling development.
The result - 1,200 kg/hour on the new extruder versus 435 kg/hour on the previous model - was an exceptional increase. These trials involved exactly the same formulation to ensure a true comparison.
Also in the USA, a MP65 600rpm extruder that was only able to achieve 34% torque due to issues feeding a low bulk density black epoxy was fitted with new MAX³ twin lead feed screws, and was able to increase the torque to 56%. This resulted in throughput going up from 308 kg/hr to 517 kg/hr - a 67% increase. The customer is now using these feed screws on all their lines.
In the UK, a customer running a semi-gloss polyester had torque instability, fluctuating between 45% and 58%. Product was also bridging and backing up the feeder funnel. When new MAX³ lead screws were fitted, the torque stabilized at 48%. Throughput increased by 9% to 1,157kg/hour, and labour costs were reduced because a dedicated operator was no longer needed to watch over the torque fluctuations.