Home >> Patent Categories

Patents

Patent Search

United States Patent 5887972
Douris , ê et al. March 30, 1999

Extruder for plastic granules

Dickmeiss , Ê et al. March 30, 1999

Abstract

An extruder for melting plastic granules which is designed as a two-stage system in an integrated structural unit with an extruder chamber having an extruder screw in a heatable housing, as well as with a drying chamber having a heated conveying screw with displacement elements which dry the plastic granules and axially convey them to the extruder chamber without compression. In a preferred embodiment, the conveying screw has a larger diameter than the extruder screw, and displacement elements of greater depth than the extruder screw.