Patents
United States Patent 4925313
Douris , ê et al. May 15, 1990
Mixing screw for extrusion and injection molding
Nunn May 15, 1990
Abstract
A plasticating screw having a mixing section comprised of two flow channels separated by barrier flights having axially spaced undercut sections and areas of compression and decompression in each channel. Inhomogeneities in the material being plasticated are distributed in both the forward and back directions by means of pressure driven cross-flows caused when the material encounters a section of a channel having a decreasing depth adjacent an undercut section of the barrier flight.
Feed Screws
Barrels
Augers
Static Mixers
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