Agitating – Rubber or heavy plastic working – Stirrer is through-pass screw conveyor
Patent
1997-11-18
2000-05-16
Cooley, Charles E.
Agitating
Rubber or heavy plastic working
Stirrer is through-pass screw conveyor
366 87, 366 90, B29B 742, B29B 758
Patent
active
060627174
ABSTRACT:
An apparatus and process for chopping and mixing a polymeric material having an elongated hollow barrel element with a material inlet end and a material outlet end and housing a rotatable extruder screw. The rotatable extruder screw includes at least one flightless screw section and at least one stationary tube element made from a bearing material and forming a plurality of serrations at at least one end, the stationary tube element being disposed around the flightless screw section within the elongated hollow barrel element and fixed against rotation with respect to the elongated hollow barrel element. The flightless screw section forms at least one material melt recess in a region corresponding to the serrations of the stationary tube element. Extruded products requiring, and characterized by, low shear, uniform dispersive mixing are made in one process step in a single screw extruder employing this invention.
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Bernie Miller, Mixer Adds Dimension to Single-Screw Capability, Plastics World, Mar. 1996.
Schirmer Henry G.
Shida Mitsuzo
BBS Corporation
Cooley Charles E.
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