Patents
United States Patent 5573331
Douris , ê et al.
Multiple-stage screw for blending materials
Lin November 12, 1996
Abstract
A multiple-stage extruder for mixing and extruding plastic. A central area of the screw includes a first blending area that has several obliquely positioned grooves. A second blending area includes a plurality of round protrusions. Both ends of the screw are supported in a main body to prevent vibration of the unit.
Feed Screws
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