TECHNOLOGY | SHREDDERS
Enma’s EMS single shaft shredder forms the basis for its new two-in- one shredder- granulator
a V-rotor for lumps and large objects or an F-rotor for fibres and film. The screen size can be chosen to fine-tune the final shredded product to the ideal size, for reintroduction into a produc- tion line or for recycling. Weima has also developed
the WLK 30 Super Jumbo, a large machine designed to meet the needs of operations with large pieces of scrap or large throughput quantities. The Super Jumbo line of machinery is claimed to be both versatile and reliable, with robust construction. The range is also designed for applications requiring custom settings, with over 80 optional features available on the machines. Rapid Granulator has made a significant investment in machining equipment at its head- quarters in Bredaryd, Sweden. Installation of three high-precision, highly automated machining centres — in a total investment of €4.5m — will provide the company with extra capacity to produce core components to tight tolerances while improving overall process flow. The machining centres are fully integrated with an FMS (flexible manufacturing system) centre, involving automatic rail-guided vehicles that have the capability of running without any operator intervention. Compo- nents produced on the new equipment will be used in granulators that Rapid produces in Bredar- yd and also at its US facility in Pittsburgh, PA. The company’s Raptor Series of shredder-granu-
lators for plastics are modular units that feature an ‘open-hearted’ design to enable quick and direct
access to the shredder rotor and cutter cham- ber. The front door, hinged on the side, provides unrestricted access to the rotor and to the screen, which is mounted in the door. Once the front door is open, the shredder hopper mounted on a rear hinge can be tilted back. There are two system designs for pushing material into the rotor — FlexiPush and PowerPush. The PowerPush is available with an extended pusher length (Power-
Push-XT). The FlexiPush is a pneumatically driven pusher and is intended for handling basic applications, including lumpy materials. It can handle large products such as a 1,200 l IBC, for example. The hydrauli- cally powered PowerPush maximises output for shred-
ding sheet and film.
There are also three different cutting systems: Quad Cut, Claw, and Power Wedge. The QuadCut cutting system for general plastic waste features a solid knife that allows the full use of all four cutting edges. The cutting system is extremely durable and has a solid clamping system attaching the knife to the rotor. The knives are supported by a sacrificial washer in order to protect the rotor should non-plastic material accidently enter the cutting chamber. Zerma has developed the ZIS series of shred-
ders targeting the recycling of large volume parts, such as IBCs, barrels and pallets, that otherwise would require a bigger machine. The shredders feature an internal hydraulic pusher which increas- es the internal volume without increasing the footprint. The company says that while it can be used for in-house recycling in big volume blow moulding operations, it is also versatile enough to be used for general plastics recycling. Like all Zerma shredders, the ZIS can be equipped with a wear package for processing of highly abrasive or filled materials. The ZIS series shredders are single shaft
Right: The QuadCut system is an option on the Raptor Series from Rapid Granulator
42 PLASTICS RECYCLING WORLD | May/June 2018
shredders with a large internal volume. The re-designed hydraulic pusher system creates about 35% more space in the cutting chamber while increasing the power and speed of the ram itself. The machines are equipped with a 457 mm diameter Zerma E rotor with widths ranging from 1,200 to 2,000 mm. As on the ZSS machines, the rotor is driven via an oversized gearbox. The completely closed welded steel housing increases
www.plasticsrecyclingworld.com
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