MACHINERY | TWIN SCREW EXTRUDERS


Right: Leistritz has added a 60mm model to its ZSE iMaxx line of compounding extruders


to maintenance personnel on site. The system uses accelerometers mounted at


the growing recycling sector. In September last year its US parent company Hillenbrand completed the acquisition of German recycling systems manufac- turer Herbold Meckesheim and formed a Recycling Business Unit within its Advanced Process Solutions segment. This new Recycling Business Unit is able to offer modular system and plant solutions combining the complementary technologies of Coperion and Her- bold Meckesheim. Between them they can offer solutions from shredding, washing, separating, drying, and agglomerating of plastics, to bulk material handling and on to compounding and pelletising. PET recycling is a key area where Coperion aims


to offer complete systems in the future. Coperion extruders are at the heart of these systems, which provide throughputs of up to nine tonnes per hour. The recycled outputs are approved by FDA for direct contact with food. According to Coperion, its ZSK twin-screw


extruders are well suited to energy-efficient recovery of plastics of all types, offering gentle processing, short residence time, intensive devola- tilisation, and good dispersion at high throughputs. When compounding at high throughputs,


Right: Coperion says its ZSK series extruders, shown in a 70mm version, are well suited to recycling as well as virgin compounding projects


46


seamless interaction of all process stages can be decisive. Maximising uptime is also critical. Coperion offers the option to equip the gearboxes on some ZSK twin screw extruders with a condition monitoring system. Designed to identify irregularities in gearbox operation early enough to avoid potential damage, the system can significantly improve planning of mainte- nance interruptions. Necessary service calls can be scheduled in advance and, using the company’s remote service option, engi- neers can provide support and give direction


COMPOUNDING WORLD | March 2023


several points on the extruder gearbox to monitor vibrations at each gearbox bearing. When vibration approaches a critical threshold, a warning is sounded and action can be taken. Using the company’s EpcNT extruder control, the machine operator can visualise the condition of every gearbox bearing and gauge the overall gearbox condition at a glance. Moreover, condition parameters, such as the vibration amplitude in the corresponding frequency band, can be added to the display separately for each bearing. Over the long term, damage to the ZSK extruder gearbox and corresponding downtimes can be reduced or even avoided altogether. Coperion has offered this condition monitoring technology for its larger ZSK extruders for many years. It has now been rolled out to small and mid-sized ZSK models, covering the range from 43 to 133mm. At last year’s K show, Coperion also introduced a new version of its ServiceBox. The Coperion ServiceBox CSB 4.0, which will eventually replace the existing ServiceBox offering, considerably expands remote service support options. The company says it allows the operator to determine with accuracy when intervention or support is required for a machine, saving valuable time. A further advantage of ServiceBox CSB 4.0 is


that it opens the path to Coperion’s C-Beyond 4.0 platform, including its smart OEE (Overall Equip- ment Effectiveness) cockpit. Production managers can use the OEE cockpit to monitor compounding systems and determine overall efficiency. At the K show in Germany last year, KraussMaffei


introduced a new addition to its ZE BluePower twin screw compounding extruder range. The 186mm diameter machine is the compa- ny’s largest to date and is aimed at processors with the highest throughputs that


www.compoundingworld.com


IMAGE: COPERION


IMAGE: LEISTRITZ


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