CDE Global’s new R-series range includes two new machines. The R1500 has a maximum feed capacity of 200 tonnes per hour (tph) while the larger R2500 machine offers a maximum feed capacity of 500 tph. Both machines are suitable for the pre-screening of a range of materials, including sand and gravel, crushed rock, and construction and demolition (C&D) materials.
The R-series combines a feed hopper, screen and conveyors in a variety of configurations. The R1500's feed hopper has a maximum capacity of seven tonnes when fitted with the optional extendable hopper sides, while the R2500's hopper capacity is 20 tonnes. Both machines can be provided with a belt feed or apron feed. The hopper has been designed to allow for feed to be delivered to the R-series from three sides, to allow maximum flexibility to cope with specific site conditions.
“The R-series allows for a constant, even flow of material to be delivered to the integrated screen before being sent for additional screening, washing and sizing,” Stewart Cusick, a CDE Global product development engineer, said. “The hopper capacity allows for charge filling of the hopper, which frees up an operator and vehicle to complete other jobs on site, ultimately reducing the level of operator intervention required.”
Kevin Vallelly, another CDE product development manager, said the R-series was developed as an efficient delivery system for processing more difficult materials.
“Whether it’s construction and demolition materials or clay-bound crushed rock, we’re helping our customers design systems that can process more challenging materials,” Vallelly said. “A key part of ensuring your processing plant performs at maximum efficiency with minimum operator intervention is getting the feed system right, and we spent over two years developing the R-series.
“This included extensive testing in Ireland, UK, Germany and Scandinavia on a wide variety of materials. This has led to the launch of the R-series, which allows customers to maximise the production capacity of additional processing phases by ensuring a consistent flow of material to the plant.”
The infinity factor
The R-series sees the introduction of two new galvanised Infinity screens from CDE, both of which include the company’s patented side wall technology, which it claimed eliminates welds and results in a stronger, lighter screen that produces the same acceleration as traditional screens while using less power.
The R1500 includes the Infinity P1-36R screen that measures 2.4m x 1.5m, while the R2500 integrates the Infinity P2-75R screen measuring 5m x 1.5m.
“The Infinity screen was designed to screen better, last longer and cost less to run,” Vallelly said. “The only assumption we made from a design perspective was that the screen needed to be rectangular and have one, two or three screen decks.
“We are able to screen better because of design features like the Rosta suspension mounts, which ensure maximum transfer of energy to the material. We eliminated welds from the side walls and the screens are galvanised as standard to deliver on the promise to last longer. It’s our patented design of the side walls that allows us to ensure the screen is strengthened where it needs to be without including unnecessary weight. This allows us to produce a screen that requires less power to run.”
Many other design features on the Infinity screens are a result of CDE's “screen better, last longer, cost less to run” design approach.
The cartridge design of the screen decks maximises plant life, as it increases the durability of otherwise welded joints. The Infinity range includes the development of cast U-Span cross-members, which are weld-free and significantly reduce floor flex – reducing stress and extending machine life.
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“In addition to the extensive on-site testing that our equipment goes through, we use many other virtual testing programs during the design phase, including finite element analysis,” Vallelly said.
“This gives us the confidence in our design and ensures that when it gets to on-site testing of our machines, it is final tweaks and minor changes that are required. There is no doubt that our comprehensive, disciplined testing procedures are hugely important to our ambition to continue to bring new products to the market every year.”
Further weight is removed from the screen thanks to the the screen shaft's unique design. This reduces the mass of the shaft assembly while generating the same force as a solid shaft – contributing further to the drive for energy efficiency.
Extensive use of replaceable wear liners at every feed and impact point maximises plant life and includes such features as a magnetic polyurethane cover on the screen shaft, tapered rubber chutes at the screen discharge point and easy to replace steel wear plates in the R-series feed hopper.
The R-series utilises SKF bearings with a unique double seal arrangement, which prevents contamination during operation of the screen by reducing the risk of material and water ingress, reducing the time required and cost of essential plant maintenance, and maximising production from the machine.
Stockpiling of material
Site safety is considered on the R-series with the raising of the side walls of the screen, to prevent rogue rocks from bouncing off the top deck of the screen.
The two machines in the R-series also include 800mm galvanised walkways to ensure site operators have quick, easy and safe access for essential machine inspection and maintenance.
Stockpiling and delivery of material to additional processing phases is facilitated with the inclusion of 9m feed and stockpile conveyors in a variety of configurations, depending on the specific requirements of the project. The 9m stockpile conveyor for oversize material allows for a stockpile capacity of 150m3. The R-series includes a collection conveyor underneath the integrated Infinity screen, which delivers material to an additional stockpile conveyor or directly to the feed boot of the M2500 or M4500 modular washing plants.
The patented CDE Infinity Screens were launched at Bauma 2016 in Munich, Germany, in April this year, where the R2500 and its range of equipment was also on display. The launch brought to customers a revolutionary range of elliptical, circular and linear motion screens with application in the sand and aggregates, C&D materials, recycling and industrial sand sectors.
Neil Mullan, a CDE senior research and development engineer and the lead designer on the Infinity range, was at the official launch.
“The Infinity screen includes design features such as the Rosta suspension mounts, which deliver 98 per cent vibration isolation, ensuring protection for the supporting structure and the most efficient transfer of energy to the screening material,” he said.
Source: CDE Global