Material conveying screw and method for producing same
AssigneeCompagnie Generale Des Etablissements Michelin
InventorsChristophe Ougier, Arnaud Letocart
Life of this patent
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Abstract
A screw having a longitudinal body and, around this longitudinal body, at least one flight extending in the shape of a helix, the flight including, over part of its length, internal partitioning delimiting a plurality of internal channels that extend in the shape of helices following the helix shape of the flight. The screw includes manifold-like cavities into which the ends of the interior canals open, the manifold-like cavities extending radially and opened into a longitudinal bore of the body at longitudinally spaced locations. This screw can be produced by additive manufacturing using laser-induced fusion.
Claims10
A one-piece screw made by additive manufacturing comprising:
- a longitudinal body;
- and
- around the longitudinal body, at least one flight extending in the form of a helix,
- wherein the flight comprises, over part of its length, interior partitioning delimiting a plurality of interior canals that extend in the form of helices following the helix shape of the flight and comprising cavities into which the ends of the plurality of interior canals open,
- wherein the interior partitioning comprises a core and a plurality of interior partitions that radiate from the core so as to delimit the plurality of interior canals positioned around the core, a first part of the plurality of interior partitions meeting an exterior wall of the flight and a second part of the plurality of interior partitions meeting the outer surface of the longitudinal body, and
- wherein the cavities extend radially and open into a longitudinal bore of the longitudinal body at longitudinally spaced locations.
Dependencies are inferred from the claim text.