Back to results
US 8,939,001 B2Granted
Method of extrusion forming
AssigneeShowa Denko K.K.
InventorsYoichi Momo, Denjiro Kaneko
Life of this patent
Estimating the term…
Abstract
In an extrusion molding method, a discard 7 is pressed in the thickness direction with a stem 2 after releasing the restraint of the external peripheral surface of the discard 7 by the container 1 or while releasing the restraint to thereby reduce the thickness of the discard 7, and then the discard 7 is cut off with a shearing blade 4.
Claims6
A direct extrusion molding method comprising:
- an extruding step for obtaining an extruded member by pressing a billet loaded in a container with a stem in an extrusion direction to press the billet against an extrusion die arranged at a downstream side of the container;
- a discard thickness reduction step for reducing a thickness of a discard by pressing the discard between the stem and the extrusion die in a thickness direction of the discard to reduce the thickness of the discard by plastically deforming the discard with the stem after releasing restraint of an external peripheral surface of the discard by the container or while releasing the restraint;
- and
- a discard shearing step for shearing the discard with a shearing blade after the discard thickness reduction.
1 more element
A direct extrusion molding device comprising:
- a stem configured to press a billet arranged in a container in an extrusion direction;
- a shearing blade configured to shear a discard of the billet, and
- an extrusion die arranged at a downstream side of the container,
- wherein the stem is configured to press the discard in a thickness direction of the discard between the stem and the extrusion die to plastically deform the discard so that a thickness of the discard is reduced after releasing a restraint of an external peripheral surface of the discard by the container or while releasing the restraint.
1 more element
Dependencies are inferred from the claim text.