Device and method for the extrusion of thermo-mechanically deformable materials in bulk form, and compact screw extruder

US11597118B2 · kind B2 · utility

Assignee

• AIM3D GmbH · DE

Inventors

• Tom Rückborn · Rostock, DE
• René Zielke · Rostock, DE
• Clemens Lieberwirth · Rostock, DE
• Vincent Morrison · Krakow am See, DE
• Hermann Seitz · Rostock, DE

Key dates

• Filing date: Jun 26, 2018
• Grant date: Mar 7, 2023
• Expiry date: Dec 18, 2038

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C64/209
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Method and device for the extrusion of thermomechanically deformable materials, as well as a compact screw extruder. The configuration of the material infeed in a screw extruder, has a significantly smaller length-diameter ratio than known solutions from the fields of injection moulding and additive manufacturing and a crushing tool, located in the funnel-shaped infeed region of the vertically arranged screw extruder which prevents the rotational movement of the material in the funnel, and also thereby forces movement in the conveying direction of the screw extruder in combination with the gradient of the screw flanks. In addition, a portion of the coarse material is crushed, whereby the bulk material density is increased in the region of the screw and less air must be pressed out of the material in the region of the plasticization and homogenization zone.