Agitating – Rubber or heavy plastic working – Stirrer is through-pass screw conveyor
Patent
1992-07-02
1993-06-08
Jenkins, Robert W.
Agitating
Rubber or heavy plastic working
Stirrer is through-pass screw conveyor
366 89, 366 90, B29B 106
Patent
active
052173038
ABSTRACT:
An extrusion apparatus is provided for the mixing and extrusion of thermo-plastic and thermo-setting materials and the pelletizing of thermo-set materials, in which a rotor member is rotatable within a barrel member. The apparatus is articulated into three sections including a barrel entrance section, a forcing section and a metering section. Each section is provided with helical rotor extrusion grooves, and is followed by a circumferential barrier and a rotor to barrel to rotor mixing zone. The circumferential barrier is provided with a clearance, barrier top to barrel bore, designed to pass fluent material and retarding the over-size and less fluent material. The leading edge of the circumferential barrier is provided with multiple dual purpose plows which, direct the fluent material downstream and the over-size and less fluent material upstream for additional working. The circumferential barrier communicates with the co-acting receiving geometry of the barrel and effects the transfer of the fluent material to the barrel grooves. The barrel grooves co-acting with the smooth surface of the rotor are arranged to have various extrusion rates so as to displace the material longitudinally and thereby achieve longitudinal blending. The barrel extrusion grooves discharge into the barrel sending grooves which transfer the material from the barrel back into the rotor receiving geometry.
REFERENCES:
patent: 4155655 (1979-05-01), Chiselko
patent: 4640672 (1987-02-01), Ellwood
patent: 4652138 (1987-03-01), Inoue
patent: 4872761 (1989-10-01), Geyer
Gossett Dykema
Jenkins Robert W.
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