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21.09.2015
Screw feeder controls flow of bulk pharmaceutical powder
Ajax Equipment, Bolton, UK, recently supplied the UK subsidiary of Hosokawa Micron with an agitated screw feeder plus integral hopper to handle and control the feed of pharmaceutical powder into a milling machine. This is tipped from a bulk bag into the agitated screw feeder’s large hopper section, allowing gravity flow to a robust, multi-bladed agitator and screw feeder. The auger features a stepped shaft with variable pitch, to pick up the cohesive powder progressively from the full length of the agitated feeder outlet.
Designed for clean-in-place sanitising regimes, all parts of the agitated screw feeder are constructed of 316L stainless steel, with internal surfaces mechanically polished to provide a crevice-free finish. The feeder’s upper hopper section features brackets allowing it to be mounted on load cells bolted to the floor with the rest of the hopper and screw feeder suspended beneath. It meets the requirements of ATEX zones 1 & 21 internally and zones 2 & 22 externally. Changes in weight of the entire assembly allow gravimetric control, ensuring a consistent feed rate to the mill. www.ajax.co.uk
The Ajax agitated screw feeder
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