MACHINERY | MELT FILTRATION
Industry 4.0 compliant model is available. According to Sandy Guthrie, President of US company ADG Solutions –manufacturer of the CFO series of continuous melt filtration systems – reliability and durability are the most important issues to consider when selecting screen changers and melt filters for compounding. “These are the two features where the CFO filter
excels,” he says. “The screen or filter medium is a plate and is extremely reliable in terms of filtration and, in the case of contamination, strong enough to prevent a breach that might make for filtration failure. In addition, continuous filtration is essential. The CFO is designed to run for 2,000-4,000 wipes, contamination dependant, so that the process can run uninterrupted for extended periods of time without a screen change. In continuous mode, there is very little pressure drop and the wipe timing in this mode is variable.” Guthrie adds that with the ability to export plastics from the US for recycling all but gone, the need for recyclers and compounders to filter these
materials has greatly increased. “In general, we are able to run materials with more paper, floor sweeps, unmelts and contamination. This helps keep a lid on purchases as the price for scrap and virgin materials continues to swing. Buying at the lower end of the market is much more stable, although costs of the reprocessing equipment are higher,” he says. The CFO series is said to perform very well with high levels of contaminants, including hard materials such as paper, unmelts, stones and small metals. “We continue to develop new, stronger, longer lasting screens. We are also targeting reduced manpower on the line as the screens have an extremely long wipe life. Future developments under design include a new discharge system to work with paper and smaller contaminants,” Guthrie says.
Expanding options
Left: The CFO 25 is the latest
continuous filter addition to the ADG Solutions product line
ADG Solutions has made a number of improve- ments to the CFO line of continuous melt filtration systems including the introduction of a new model – the CFO 25. This can process up to 7,500 lbs/h (3,402 kg/h) depending on materials and contami- nation. The new CFO 25 is said to offer a 10% larger screen surface area than competitors and sizing that is completely Imperial (it replaces the existing 600mm model). Features include 360 degrees of studs, which improves surface sealing and prevents leaks. The design is claimed to tolerate pressures of up to 3,500 psi. The company says that other advances implemented across the full CFO line include a new scraper design that has been refined for smaller purges. This improves efficiency and covers a broader range of applications. The corresponding computer program controls have been updated to allow the amount of scrapes in-between purging to be varied, so the user can maximise contamination collection. The screen plate filter has also been redesigned to be thicker,
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