Certains contenus de cette application ne sont pas disponibles pour le moment.
Si cette situation persiste, veuillez nous contacter àObservations et contact
1. (WO2018226709) SYSTÈMES ET PROCÉDÉS D'ALIGNEMENT DE PARTICULES ANISOTROPES POUR LA FABRICATION ADDITIVE
Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

CLAIMS

What is claimed is:

1. A system for additive manufacturing comprising:

a reservoir configured to contain a precursor material comprising a matrix material and a plurality of anisotropic particles;

a build plate configured to move towards a lower surface of the reservoir to allow the build plate to be at least partially submerged in the precursor material;

an actuator configured to cause relative motion between the reservoir and the build plate to expose the precursor material to a shear force causing a portion of the plurality of anisotropic particles to become oriented in a selected alignment direction based on a direction of the shear force; and

a radiation source configured to emit radiation towards the reservoir to solidify a portion of the precursor material.

2. The system of claim 1, wherein the actuator is configured to cause rotational motion of at least one of the reservoir and the build plate.

3. The system of claim 1, wherein the actuator is configured to cause translational motion of at least one of the reservoir and the build plate.

4. The system of claim 3, further comprising a rail coupled to the reservoir, wherein the reservoir is configured to move along the rail.

5. The system of claim 4, wherein the actuator is coupled to the reservoir and configured to move the reservoir along the rail.

6. The system of claim 3, further comprising a controllable XY stage including the actuator.

7. The system of claim 1, wherein the actuator is coupled to the build plate and configured to move the build plate within the precursor material.

8. The system of claim 1, wherein:

the actuator is configured to cause relative motion between the reservoir and the build plate in a first direction to cause the portion of the plurality of anisotropic particles to become oriented along the first direction; and

the radiation source is configured to emit the radiation towards the reservoir in a first pattern corresponding to a shape of a first region of a layer of a part to solidify the portion of the precursor material corresponding to the first region of the layer.

9. The system of claim 8, wherein:

the actuator is configured to cause relative motion between the reservoir and the build plate in a second direction to cause a second portion of the plurality of anisotropic particles to become oriented along the second direction; and

the radiation source is configured to emit the radiation towards the reservoir in a second pattern corresponding to a shape of a second region of the layer of the part to solidify the portion of the precursor material corresponding to the second region of the layer.

10. The system of claim 9, wherein the first direction is different from the second direction.

11. The system of claim 9, wherein the first region and the second region are non-overlapping.

12. The system of claim 9, wherein:

the actuator is configured to cause relative motion between the reservoir and the build plate in a second direction to cause a second portion of the plurality of anisotropic particles to become oriented along the second direction; and

the radiation source is configured to emit the radiation towards the reservoir in a second pattern corresponding to a shape of a region of a subsequent layer of the part to solidify the portion of the precursor material corresponding to the region of the subsequent layer.

13. The system of claim 1, wherein:

the actuator is configured to cause relative motion between the reservoir and the build plate in a series of directions to cause the portion of the plurality of anisotropic particles to become oriented along a first direction; and

the radiation source is configured to emit the radiation towards the reservoir in a first pattern corresponding to a shape of a first region of a layer of a part to solidify the portion of the precursor material corresponding to the first region of the layer.

14. The system of claim 1, wherein the reservoir comprises a surface that is transparent to the radiation emitted by the radiation source.

15. The system of claim 1, wherein the radiation source is configured to emit ultraviolet radiation.

16. A method of producing a composite part, the method comprising:

providing a precursor material comprising a matrix material and a plurality of anisotropic particles;

exposing the precursor material to a first shear force to cause at least a first portion of the plurality of anisotropic particles to become oriented in a first alignment direction based on a direction of the first shear force;

solidifying a first region of the precursor material with the first portion of the plurality of anisotropic particles oriented in the first alignment direction;

exposing the precursor material to a second shear force to cause at least a second portion of the plurality of anisotropic particles to become oriented in a second alignment direction based on a direction of the second shear force; and

solidifying a second region of the precursor material with the second portion of the plurality of anisotropic particles oriented in the second alignment direction.

17. The method of claim 16, wherein the plurality of anisotropic particles comprise fibers.

18. The method of claim 16, wherein the matrix material comprises a polymer.

19. The method of claim 16, wherein the first alignment direction is different from the second alignment direction.

20. The method of claim 16, wherein:

the solidified first region of the precursor material adheres to a build plate to form a first layer of a part; and

the solidified second region of the precursor material adheres to the solidified first region of the precursor material to form a second layer of the part.

21. The method of claim 16, wherein the first region and the second region are included within a single layer of a part.

22. The method of claim 16, wherein at least one of the first shear force and the second shear force comprises a rotational shear force.