Mixing screw for extrusion and injection molding

Details Mixing screw for extrusion and injection molding Mixing screw for extrusion and injection molding

1988-04-06

1990-05-15

Hornsby, Harvey C.

Agitating

Rubber or heavy plastic working

Stirrer is through-pass screw conveyor

366 90, 366319, 366324, B01F 708, B29B 742

Patent

active

049253131

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.

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patent: 4639143 (1987-01-01), Frankland, Jr.
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