Rubber compounds have generally been mixed the same way for over 90 years since the introduction of the internal intensive mixer by Fernley H.Banbury in 1916.The internal intensive mixer has a number of advantages over the old two-roll mill mixing;the internal mixer is more productive,cleaner and safer.Over the years,improvements have been made to the quality and throughput(kilogram/hour)of the materials masticated with internal mixers via a number of mechanical changes.These include modified and/or new rotor designs,improved chamber designs,improved rotor cooling and improved product discharging,to name a few.This article is continued from the February 2009 issue of Rubber World.
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