System for feeding filament to a nozzle in an additive manufacturing machine

Abstract

A system for feeding filament to a nozzle in an additive manufacturing machine is provided. A filament extrusion assembly is configured to extrude the filament from a spool. A nozzle holder comprises a protruded portion. The nozzle holder defines a through hole which extends into the protruded portion. The through hole receives the filament extruded by the filament extrusion assembly. The protruded portion is located immediately below a point where the filament exits the filament extrusion assembly. A nozzle assembly comprises a cooling chamber which defines a through hole aligned with the through hole of the nozzle holder. The cooling chamber defines at least one groove coaxial with the through hole of the cooling chamber. The groove receives at least one sealing member wherein the groove is defined where the nozzle holder interfaces with the cooling chamber.

Dependencies are inferred from the claim text.