MACHINERY | GRANULATORS
Right: Conair’s SG2 Smart Granulator control adds predictive
maintenance to larger Viper models
and MDSGi 1500/600 – one of a new series of wet grinders with forced feed that have low power consumption. Hellweg’s 300 series central grinders combine a compact design with high performance. Thanks to the sturdy machine housing and the high moment of inertia of the massive, solid rotor they enable powerful grinding of a variety of parts, including pipes and profiles, thick-walled mould- ings and – when using the special BR rotor – single- stage shredding of solid lumps from production start-ups. The MDSi 600/300 Smart Control Plus version includes power consumption analysis to optimise economy and automated lubrication with Blue- tooth monitoring to minimise maintenance effort. Each system features Hellweg’s own digital Smart
Below:
Hellweg has developed a number of digitally controlled grinders
Control System which captures parameters such as power consumption, motor speed and bearing temperatures, as well as blade, screen and V-belt status. Because the control system can continuously optimise the relationship between motor load and throughput, it ensures economical operation while requiring little input from operators. Smart Control is generally available for all models and sizes of Hellweg system, starting from the 150 series machine-side grinders for granulat- ing small parts and sprues up to the 600 series heavy duty grinders designed for the toughest applications.
Leading edge In addition, Hellweg says that its R 200/20 servo- motor-driven edge trimming system brings flexibility to the shredding of extrusion edge strips. Developed with Breyer Extrusion, the new
machine’s touchscreen control allows processors to adapt this step to production conditions and optimise it for the specific applications. Designed for a working width of 200mm and cutting thick- ness of up to 20mm, the R 200/20 continuously pre-shreds one or two edge strips from film or sheet production. A downstream granulator processes the resulting chips, which are several centimetres in size, into regrind or flakes in the millimetre range as required. These can then be fed straight back into the recycling loop. Thanks to the servo geared motor, cutting cycle times can be set using the touchscreen display. As a result, the cutting frequency of the R 200/20 Servo – and the length of the edge strip chips – can be selected at a constant cutting speed. Numerous, short chips relieve the load on lower power granulators, while the longer pieces relieve the load on the chipper. In each cases, electronically controlled edge trimming cuts wear and energy consumption. The high chopping speed results in a smoother process because the permanently advancing film web only runs over the stationary blade for a short time. This minimises counter-thrust and associated lifting of the entire edge strip.
Redesigned pulveriser Neue Herbold has renewed its ZM 800 Pulverizer with a number of new features. One is the stream technique optimisation of the machinery housing. In the past, machines of this type were made with a round housing on a platform – but the new housing passage is supplied in a curved design. The background for the modification is that the material’s angular momen- tum is used for the discharge, since the material is
14 FILM & SHEET EXTRUSION | October 2024
www.filmandsheet.com
IMAGE: HELLWEG
IMAGE: CONAIR
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