GRANULATORS | TECHNOLOGY


on the quality of the finished product. Small capacity systems, injection moulding machines, and extruders equipped with small diameter plastification screws are unable to process granules with dimensions exceeding those of the virgin granule. G17-MED granulators produce regrind which is dimensionally compara- ble to the virgin pellet. The entire unit can be accessed, cleaned, and put back into operation in a matter of minutes with no need for tools and can be cleaned by vacuum. Perhaps the most innova- tive feature is the sound insulation shell which conveys sound waves towards absorption panels to maintain low noise levels. The new models are equipped with IP55 certified control panels and are certified for compliancy to Industry 4.0. CMG Managing Director Giorgio Santella said:


“Recycling of production scrap and rejects be- comes a subject of primary focus also for suppliers of plastic components for the medical and pharma- ceutical industry. CMG Granulators is constantly active in the development of new and particularly challenging solutions.” Germany-based Zerma has updated its long- running line of GSL slow speed granulators which are equipped with lightweight hoppers featuring a thick layer of sound insulating material between the inner stainless steel and external aluminium. GSL granulators are mainly used in injection and blow moulding processes. The updated models feature a staggered 300 mm diameter rotor with widths ranging from 400 to 800 mm. The rotor is driven by a geared motor and the low rotor speed reduces the noise level of the machine still further and creates less dust while grinding. The series can be fitted with different hoppers depending on requirements, while varying base frame heights and designs allow them to be tailored for specific applications.


Compact and powerful Conair recently introduced the compact and affordable GP Series to bridge the gap between shredders and granulators. Dave Miller, Conair’s General Manager for Size Reduction, said: “Conair’s new GP, or general purpose, shredders, are for processors who need a compact, cost-effective but powerful shredder for small to moderate through- puts. We’ve designed it from the ground up to be an ‘entry-level’ shredder, combining durable, reliable performance with low-maintenance features that have, until now, only been available on our much larger shredding equipment. We offer everything from special hoppers, infeed conveyors, and blowers, to all the ancillary equipment needed to build and operate a turnkey shredding system


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linked to a secondary granulator.” The GP Series is comprised of two models, the GP 924 featuring a 24-inch cutting chamber and the GP 935 with a 35-inch chamber. Within each chamber, scrap is reduced by a single 8.7-inch (220 mm) diameter steel rotor that cuts against a fixed blade knife, both of which are drop-forged from 4140 high-alloy steel for maximum durability. Rotors are equipped with four-sided, indexable cutting knives (23 or 35, depending on the model) that can be unbolted and rotated to provide fresh cutting edges between sharpenings. The fixed- blade knife, or anvil, also offers dual cutting edges. Power to the single-shaft rotor is provided by a


high-efficiency 25 hp or 40 hp AC motor, coupled through a large belt drive to an oversized, heavy- duty gearbox. These drivetrains, housed in the base of the shredder, produce high cutting torque at relatively low rotor RPM to reduce even thick scrap with limited noise. Standard GP shredders offer a large, open-top infeed hopper, at the bottom of which, a horizontal, hydraulic ram drives scrap into the cutting chamber. The ram feed is configured for low maintenance, with top and side scrapers that clean and shield the ram face, preventing shredded material from entering the mechanism. Ram direc- tion and speed, as well as overall shredder opera- tion, are controlled through a programmable logic controller, accessed through a touchscreen HMI.


CLICK ON THE LINKS FOR MORE INFORMATION: � www.hellweg-granulators.com � www.keeneymfg.com � www.wittmann-group.com � www.advancedplasticsmachinery.com � https://getecha.de � www.buechler.at � www.lechner-kunststoffteile.at � www.cmg-granulators.com � https://zerma.com � www.conairgroup.com � www.matsui-europe.com


September 2024 | PLASTICS RECYCLING WORLD 41


Above: Zerma’s GSL range of slow speed granulators


IMAGE: ZERMA


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