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Charlotte Stonestreet
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Cool under pressure
22 October 2013
A portable single phase testing unit developed by Mike Atkin of Atkin Machine Tool Maintenance, along with control systems' expert, George Newton of Newton Tesla (Electric Drives, is helping injection moulders and mould toolmakers to ensure consistent quality. Based on a relatively simple pressurised water technique, the key to its success is an automated control panel based on Mitsubishi Electric components.
To achieve a high level of accurate performance, cycle after cycle, a high specification multi-stage stainless steel pump is fitted with a D720S series 1.5kW Mitsubishi inverter, a Mitsubishi Alpha II (Programmable Logic Controller) and flow and pressure sensors in a closed loop configuration.
In use, an adjustable water pressure of up to 12 bar is maintained throughout the flow stages of the test cycle by means of the inverters inbuilt pressure control algorithm.
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