Consumable filaments having reversible reinforcement for extrusion-based additive manufacturing
First Claim
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1. A method of building a three-dimensional part with an additive manufacturing system, the method comprising:
- providing a supply of feedstock material to a liquefier of the additive manufacturing system wherein the feedstock material comprises at least 50% by weight an elastomer and up to 50% by weight a reinforcing additive wherein the feedstock material has a flexural modulus greater than about 300 megaPascals (MPa);
heating the feedstock material in the liquefier and extruding the molten feedstock material through a nozzle provided in an outlet of the liquefier;
depositing the molten feedstock material in a layer by layer manner to build the three-dimensional part; and
chemically treating the three-dimensional part to dissolve or weaken at least a portion of the reinforcing additive such that the flexural modulus of the three-dimensional part is less than the flexural modulus of the feedstock material.
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Abstract
A consumable assembly for use with an additive manufacturing system to print three-dimensional parts, the consumable assembly including a supply device (e.g., a spool) and a filament supported by the supply device, where the filament has a composition comprising one or more elastomers and one or more reinforcing additives, and a filament geometry configured to be received by a liquefier assembly of the additive manufacturing system. The composition is preferably configured to be thermally and/or chemically modified to reduce its flexural modulus.
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Citations
9 Claims
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1. A method of building a three-dimensional part with an additive manufacturing system, the method comprising:
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providing a supply of feedstock material to a liquefier of the additive manufacturing system wherein the feedstock material comprises at least 50% by weight an elastomer and up to 50% by weight a reinforcing additive wherein the feedstock material has a flexural modulus greater than about 300 megaPascals (MPa); heating the feedstock material in the liquefier and extruding the molten feedstock material through a nozzle provided in an outlet of the liquefier; depositing the molten feedstock material in a layer by layer manner to build the three-dimensional part; and chemically treating the three-dimensional part to dissolve or weaken at least a portion of the reinforcing additive such that the flexural modulus of the three-dimensional part is less than the flexural modulus of the feedstock material. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of building a three-dimensional part with an additive manufacturing system, the method comprising:
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providing a supply of feedstock material to a liquefier of the additive manufacturing system wherein the feedstock material comprises at least 50% by weight an elastomer and up to 50% by weight a reinforcing additive wherein the feedstock material has a flexural modulus greater than about 300 megaPascals (MPa); heating the feedstock material in the liquefier to a temperature that thermally degrades or softens at least a portion of the reinforcing additive; extruding the molten feedstock material through a nozzle provided in an outlet of the liquefier; and depositing the molten feedstock material in a layer by layer manner to build the three-dimensional part, wherein the flexural modulus of the three-dimensional part is less than the flexural modulus of the feed stock material. - View Dependent Claims (8, 9)
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Specification