Reloading powders to a twin screw compounding extruder
Non-flowing powders and granular materials can cause problems during hopper reloading. To optimize the process several factors must be considered: rate of reload, container used (bags, super sack, silo, etc.), distance to be conveyed, bulk density after conveying, and ceiling height. Reload systems can be vacuum loading (not possible with many powders), dense phase conveying (conveys the powder through tubing in discrete "packets"), and mechanical screw conveying (simple and reliable). Filterless back pulse dust control units are incorporated into the design, and all flanges and doors use gaskets to prevent leaks.
