Controlled shear cold-feed mixture extruder

Abstract From the Canadian patent

An extruder, including a rotor and a barrel having mixing or, working zones therein in which the material being mixed or worked is transferred layer by layer from upstream grooves in the rotor to input grooves in the barrel, and from output grooves in the barrel which grooves are interleaved with the input grooves layer by, layer back to downstream grooves in the rotor. The input and output grooves of the barrel are intercommunicated by means of corresponding channels each of which has a selectively radially movable throttling member positioned therein for varying the crosssectional opening of the channel in which it is positioned and thus, the amount of shearing action and work performed …