TECHNOLOGY | SHREDDERS
Right: Electric powered shredders like the BCA 2000 from BCA Industries feature design advances that can deliver the necessary torque and chamber size to shred bulky, recyclable materials quickly
durable welded steel construction with a maintenance-friendly design and good accessibility through a large double-wing door and a hydraulically swing-away grinding chamber trough. In many washing plants, the EWS 60/210 serves as the first process stage. A special feature of the single-shaft 60/210 shredder is the externally mounted and wear-protected rotor, which allows individual knife configurations in the cassettes and is equipped with screwed-on armour plates, which eliminates time-consuming hard facing. The rotor also allows replaceable stator knives, and a second row can be fitted as an option. Due to large flywheel masses, the double- sided belt drive is energy-efficient and requires little maintenance because of a failure-free gearbox. An overload clutch protects against unshreddable feed material that could cause damage to the machine. Herbold Meckesheim has recently worked with
Chilean company Virutex on the recycling of agricultural waste, such as irrigation and drainage hoses, agricultural films and post-consumer foils. The quantity of waste to be processed by the company had increased significantly in recent years. The single shaft EWS 45/160 shredder that had been used was no longer generating enough throughput and was prone to intensive servicing due to overloading. After consulting with the Herbold team, Virutex decided to replace the EWS 45/160 with a new EWS 45/200 machine, which would shred waste more efficiently. The require- ments were met and the EWS 45/200 now process- es 1-1.5 tph with 80 mm sieve perforation. The appliance is maintained in good condition through regular servicing and cleaning. A new servicing plan
allows the blades to be used for two months and are turned every 15 days. Machine servicing advantages include easier access to the blades, with blade changes taking only 3-4 hours compared with 7-8 hours previously. There is simpler cleaning of the
machine due to better access to the rotor and because the service door on the top of the funnel is attached on the back. There is effective cooling due to the simply constructed hydraulic unit and the belts sit better with no slippage on the pulleys. Ebel adds that future developments at Herbold
Meckesheim will include further refinement and enhancement of wear protection and ease of maintenance of shredders and reduced labour requirements. This will include further develop- ments to the rotor drafts, as well as modular design and adaptation to flexible configurations for washing lines. According to John Neuens, Industrial Consultant
of BCA Industries in the US, the current market for the company’s Triplus shredding technology, which allows recyclers to get a desired size without screens or fines, is good. He adds that important trends in shredders include automation and quicker sizing, which helps save labour that is hard to find and increases throughput per hour. Current developmental areas include the shredding of whole bales using shredder programming without the need for bale breaking prior to processing, as well as the separation of colours and different chemistry in plastic products. BCA Industries has developed Triplus knife technology and a range of programs for all shredding processes – destruction and reduction before separation. “The Triplus system allows our
IMAGE: BCA
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