MACHINERY | RECYCLING
marketing, said CMG refers to the Evoluzione series as ‘supergranulators’. There was good feedback to the new technology from visitors to CMG’s stand, he said, identifying three key features that generated interest. The first is the Evoluzione’s cutting chamber, which is made of CNC machined steel parts, all ‘bolt-and-dowel’ assembled to provide precision of assembly to the 100th of a millimetre and precision of cutting to the 10th of a millimetre. A completely assembled cutting chamber allows easy mainte- nance when a part must be replaced. The assembly includes replaceable Hardox plates. The Evoluzione’s Adaptive Motor Power (AMP)
control and EISA type motor were also attractive to visitors, said Santella, as these provide the highest degree of reliability and operational energy efficiency. The AMP can adjust the power of the motor automatically to determine the best opera- tional condition so the regrind has the most homogeneous dimensions, eliminates powder and reduces deterioration of rotor and bed knives. Santella said another important feature of the
Evoluzione is its Industry 4.0 controls that allow the user to have a full diagnostics screen indicating all operational conditions of the granulator, and that enables connectivity via the OPC-UA protocol to export any of the operational parameters to external systems. “Predictive maintenance and auto adjustment to the conditions of operation of the recycling line are additional distinctive and unique features of the Evoluzione granulators,” he said.
Right: CMG’s EV616 granulator is part of its Evoluzione series
The “other star” of CMG’s K2019 exhibit, said
Santella, was its new VP regrind evacuation system which avoids the creation of dust by using different technology to a conventional evacuation system’s through-blowers. He explained: “These are fans that are capable of pulling the regrind off the granulator and push the same to the receiving cyclone. The latter operate in a much more efficient way, pulling the regrind all the way to the cyclone receiver, allowing no dust generation by friction into the blower impeller or against the conveying pipe walls, and no powder pollution at the point of discharge into the holding bin or storage container, as the cyclone receiver is kept under negative pressure all the time.”
Close control Hellweg presented new Industry 4.0 controls for its machinery at K2019. It showed its MDSi 150 granulator with new digital Smart Control system which enables networked communication with upstream and downstream components, as well as with opera- tors, in line with Industry 4.0 standards. The new system measures and stores power consumption as well as, for example, rotational speed and bearing temperatures and monitors the service life of bearings, blades, screens and the drive V-belts. This new Smart Control system is available for all Hellweg granulators from the 150 series upwards. The company said that monitoring mechanical mill components enables predictive maintenance to avoid unplanned production downtime, while possible faults and damage can be detected at an early stage. A visual alarm informs the operator of the need to replace a part due to wear. An active V-belt monitoring system automatically switches off the granulator in the event of a deviation from the nominal value. Hellweg’s new “boost operation” option enables a
short-term increase in grinding performance, in order to compensate for production-related fluctua- tions. In addition, certain rotational speed ranges have been defined for various plastics, due to which, for example, low melt-temperature granulation can be performed continuously without problems arising, so that water-cooling is not required. It said that recording of power consumption allows conclusions to be drawn about the specific energy input when grinding certain plastics to defined grain sizes. Smart Control evaluates measured power consumption over extended periods of time. The operator can use a digital ammeter in real-time operation and access detailed statistics that have been compiled over
32 PIPE & PROFILE EXTRUSION | April 2020
www.pipeandprofile.com
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