PETpla.net Insider 09 / 2015

MATERIAL / RECYCLING 13 PET planet insider Vol. 16 No. 09/15 www.petpla.net Granulator for PET Herbold Meckesheim provides customised solutions for the recy- cling of plastic waste in the fields of shredding, grinding, pulverizing, agglomerating, dry and wet cleaning, processing of compounds and metal separation. One example delivered to a French mineral water producer: A Herbold granulator of the C-series with integrated sound insulation for size-reducing PET bottles and preforms from the production of these hollow bodies. The scrap components are collected in containers that are emptied with the help of a tilt- ing device onto a sorting table upstream of a conveyor belt. This sorting table is especially equipped with several cavi- ties enabling the evacuation of foreign bodies such as small screws, wooden pieces or other extraneous materials – the bottles and preforms are forwarded to the conveyor belt by the operator. At the same time the special belt design makes a dosed feeding of the granulator inlet possible. The parts touching products are made of stainless steel. An integrated metal detec- tor stops the feeding belt in case of detected metal foreign bodies in the feeding material to make their easy removal. Magnetic foreign bodies,stainless steel and other non-magnetic metal parts are detected. The Herbold granulator type SML 45/70 works with the double cross cutting geometry. The rotor and stator knife are mounted at inclined angles opposed to each other, thus ensuring a “true scissor cut” and gen- erating little dust and noise and reducing the power input. With a power of only 37 kW a throughput of 1500 – 2000 kg/h of PET preforms is yielded. The outboard rotor bearings are completely separate from the grinding chamber, and no fines from the grinding material can destroy the bearings. The screen and the upper part of the hous- ing can easily be hinged open. The knives can be adjusted outside in a jig supplied with the machine. The regrind is evacuated by the suction unit, freed from dust and can be reused for the production of new bottles. www.herbold.com Herbold Granulator RECYCLING S P E C I A L