Agitating – Rubber or heavy plastic working – Stirrer is through-pass screw conveyor
Patent
1992-05-14
1994-08-30
Simone, Timothy F.
Agitating
Rubber or heavy plastic working
Stirrer is through-pass screw conveyor
366323, B01F 708
Patent
active
053421256
ABSTRACT:
A feedscrew for an extruder or molding apparatus has an elongated body with a helical thread formed thereon defining a first channel "A ". At the start of a mixing section, a channel "B " is cut in the center of the channel "A " and both channels are of the same pitch. The channels start at the same depth, but the channel A decreases in depth to a minimum and the channel B increases in depth to a maximum. The channel B then decreases in depth to a minimum and the channel A increases in depth to a maximum where the channels are again at the same depth. This channel within a channel configuration is repeated along the mixing section. The purpose of the arrangement is to compress and decompress the material being fed through the assembly to obtain the desired mixing action for low shear homogenization of the viscous plastic polymer.
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Great Lakes Feedscrews, Inc.
Simone Timothy F.
Soohoo Tony
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