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machinery | Materials handling


Kreyenborg’s PET Booster dries samples quickly by circulating material and heating it with infrared radiation


fluctuations in the extrusion process, which can affect product quality. The variation can be eliminated with PET Booster, which can realise a 30% increase in throughput, says the company. “The toxic liquid precipitate from the vacuum system


is also reduced by 50%,” says the company. The device works by continuously circulating PET


flakes or pellets and heating them directly with infrared radiation – ensuring that the PET crystallises and dries in a single step. It can dry PET to a moisture level of 200-300ppm –


Below: Conair’s R-Pro vacuum conveying system


minimises pellet fracturing and equipment wear


but this can be improved to 100-150ppm by combining it with a final drying hopper. Meanwhile, Moretto says that its Moisture Meter – launched at K2016 last year – is now available world- wide. The device forms the final part of its ‘Drying 4.0’ project to create a true closed-loop and precise drying system that can automatically adapt to changing conditions and optimise energy consumption. It is an in-line resin moisture analyser that has been


developed in cooperation with two universities and an independent research laboratory. With the instrument, it is possible to certify the


production of plastic parts and when installed directly on the processing machine, measure the actual moisture content of the plastic granules. No calibration is required and it is only necessary to select the


polymer, from an included materials database, to be treated. Moisture Meter will control the process by sampling every 10 seconds. For customers that need a complete closed-loop drying solution, Moretto also offers Moisture Meter Plus, integrating an optional Crown accessory – which measures the incoming moisture content of the resin before treatment. Moisture Meter and Moisture Meter Plus come


available in two models suitable for applications up to 1,500kg/hr and capable of monitoring a moisture content level of 15-3000ppm.


Going Pro The R-Pro vacuum conveying system from Conair minimises pellet fracturing, angel hair and equipment wear caused by conventional dilute-phase conveying. The company claims that R-Pro takes a new approach to vacuum conveying by reducing the flow rate – without limiting throughput – in order to minimise resin damage. Pellets move at slow speeds in dense slugs of


material, from around 70m/min (230ft/min) up to 366m/ min (1200ft/min). In comparison, conventional high- speed dilute-phase conveying can run as high as 829m/ min (6000ft/min) – which can cause pellets to smear against the sides of aluminium tubing, creating ‘angel hair’ that can clog the system. The company has also developed a Mobile Drying/


Conveying (MDC) system with standard colour touch- screen control interface. The MDCW combines a Carousel Plus Dryer with a conveying blower, dust collector and direct-feed vacuum receiver to convey dried material to the throat of a processing machine – all assembled on a safe, convenient wheeled cart. At K2016 last year, the MCDW was shown with Conair’s latest DC-A touchscreen control interface. Conair’s DC-A dryer control is now available on mid-sized dryers and has been further enhanced with remote access via Virtual Network Computing (VNC).


34 FILM & SHEET EXTRUSION | May 2017 www.filmandsheet.com


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