Home >> Patent Categories

Patents

Patent Search

United States Patent 4859069
Douris , ê et al. August 22, 1989

Extrusion apparatus

Geyer August 22, 1989

Abstract

The apparatus is for the straining and processing of plastic and rubber like materials and has a rotor rotatably mounted in the bore of a cylindrical barrel and operable to move process material, from one end of the bore to the other, to progressively heat, develop pressure, transport and separate the fine and fluent from the oversize and less fluent process material and to discharge the separated materials from different ports. Means, structurally integral with the rotor and barrel bore, are provided for various functions for operably developing heat, pressure and transporting said process material with minimum twining of the process material flow lines; for continuously leading off the fine and fluent process material, from each side of multiple circumferential rotor extrusion grooves into restrictive actuated circumferential openings, as formed between the barrel bore and tooth tops of the circumferential rotor extrusion grooves, longitudinally from the openings, along the tooth tops to a centrally located tooth top extrusion groove, which intercepts all of the fine and fluent process material and conveys it to ports communicating, from the tooth top extruder groove to the internal bore of said rotor; for leading off the fine and fluent process material as entered into the bore of the rotor, a stationary helical groove rotor, which due to relative rotational movement, rotor to rotor, extrudes the fine and fluent process material out of the end of the rotor and the extruder, in a smooth and even flow pattern.