Core/shell filament for use with extrusion-based additive manufacturing system
First Claim
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1. A consumable filament for use in an extrusion-based additive manufacturing system, the consumable filament comprising:
- a core portion extending along a length of the consumable filament, the core portion compositionally comprising a first thermoplastic material; and
a shell portion extending along a longitudinal length of the consumable filament and at least partially encasing the core portion, the shell portion compositionally comprising a second thermoplastic material that is different from the first thermoplastic material, wherein the consumable filament is configured to be heated to a molten state and extruded to form roads of a 3D part.
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Abstract
A consumable filament for use in an extrusion-based additive manufacturing system, where the consumable filament comprises a core portion of a first thermoplastic material, and a shell portion of a second thermoplastic material that is compositionally different from the first thermoplastic material, where the consumable filament is configured to be melted and extruded to form roads of a plurality of solidified layers of a three-dimensional object, and where the roads at least partially retain cross-sectional profiles corresponding to the core portion and the shell portion of the consumable filament.
76 Citations
29 Claims
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1. A consumable filament for use in an extrusion-based additive manufacturing system, the consumable filament comprising:
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a core portion extending along a length of the consumable filament, the core portion compositionally comprising a first thermoplastic material; and a shell portion extending along a longitudinal length of the consumable filament and at least partially encasing the core portion, the shell portion compositionally comprising a second thermoplastic material that is different from the first thermoplastic material, wherein the consumable filament is configured to be heated to a molten state and extruded to form roads of a 3D part. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A consumable filament for use in an extrusion-based additive manufacturing system, the consumable filament comprising:
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a core portion extending along a length of the consumable filament, the core portion compositionally comprising a first thermoplastic material; and a shell portion extending along a longitudinal length of the consumable filament and at least partially encasing the core portion, the shell portion compositionally comprising a second thermoplastic material that is compositionally different from the first thermoplastic material, and wherein the shell portion at least partially encases the core portion to provide an interface between the core portion and the shell portion wherein the first thermoplastic material and the second thermoplastic material are semi-crystalline materials having peak crystallization temperatures that have at least a 2°
C. or greater difference, wherein the consumable filament is configured to be heated to a molten state and extruded to form roads of a 3D part. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification