The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 11, 2017
Filed:
Nov. 19, 2007
Jens Christofer Werenskiold, Trondheim, NO;
Lars Auran, Sunndalsøra, NO;
Lillian Krakeli, Sunndalsøra, NO;
Hans Jørgen Roven, Trondheim, NO;
Nils Ryum, Trondheim, NO;
Oddvin Reiso, Sunndalsøra, NO;
Jens Christofer Werenskiold, Trondheim, NO;
Lars Auran, Sunndalsøra, NO;
Hans Jørgen Roven, Trondheim, NO;
Nils Ryum, Trondheim, NO;
Oddvin Reiso, Sunndalsøra, NO;
Norsk Hydro ASA, Oslo, NO;
Abstract
A screw extruder for the continuous extrusion of materials with high viscosity, in particular metals such as aluminum and its alloys. The extruder includes an Archimedes screw () rotationally provided within a liner () of a screw housing () having an inlet () for the feeding of the material to be extruded, a compacting or extrusion chamber () and an extrusion die assembly with a die () which forms the shape of the extruded product (). The required compaction takes place at the down-stream end of the screw towards the extrusion chamber () corresponding to up to 540° of the rotation of the screw, or up to 1.5 turns of the screw flight length. The solid plug of metal formed at the end of the screw and extrusion chamber () is restricted from rigid rotation to obtain the required compaction and extrusion pressure.