Systems, devices, and methods for additive manufacturing

Patent metadata

Field	Value
Publication number	US-11491720-B2
Application number	US-201916269713-A
Country	US
Kind code	B2
Filing date	Feb 7, 2019
Priority date	Feb 7, 2018
Publication date	Nov 8, 2022
Grant date	Nov 8, 2022

Abstract

A de-powdering basket comprises an enclosure of at least one side wall and a bottom wall. The enclosure is configured such that, when the enclosure is disposed within a build box, the outer surfaces of the at least one side wall are substantially adjacent to the interior walls of the build box. The enclosure further comprises one or more apertures disposed within the at least one side wall, each of the apertures comprising a void that extends through the at least one side wall from an interior surface of the side wall to an exterior surface of the side wall. The enclosure may be configured to accommodate a build plate situated within the enclosure. Outer edges of the build plate may cooperate with inner surfaces of the side walls of the enclosure to prevent loose powder from passing between the outer edges of the build plate and the side walls.

First claim

What is claimed is:

1. An apparatus for formation and de-powdering of one or more parts formed by additive manufacturing, the apparatus comprising:
a build box;
a build plate; and
a removeable de-powdering basket comprising at least one side wall, wherein the removeable de-powdering basket is positioned within the build box,
wherein the build plate is positioned within the removeable de-powdering basket,
wherein the at least one side wall is configured to abut an interior surface of the build box, and
wherein the removeable de-powdering basket includes one or more apertures in the at least one side wall, such that the one or more apertures are blocked by the build box during additive manufacturing of the one or more parts within the build box.

2. The apparatus of claim 1 , further comprising one or more seals disposed between one or more outer edges of the build plate and an interior surface of the removeable de-powdering basket, wherein the one or more seals are configured to form a barrier between the one or more outer edges of the build plate and the interior surface of the removeable de-powdering basket.

3. The apparatus of claim 1 , further comprising an actuator coupled to a bottom region of the build plate, and wherein the actuator is movable to raise or lower the build plate within the removeable de-powdering basket.

4. The apparatus of claim 1 , wherein the one or more apertures includes at least one aperture having at least one of a slope or a width that changes along a length of the aperture from the interior surface of the removeable de-powdering basket to an exterior surface of the removeable de-powdering basket.

5. The apparatus of claim 1 , wherein the build box comprises one or more panels that are movable to cover at least a portion of the at least one side wall when in a first position and to expose at least some of the one or more apertures in at least a portion of the at least one side wall when in a second position.

6. The apparatus of claim 1 , wherein the at least one side wall of the removeable de-powdering basket includes one or more holes or indentations configured to receive a gripper mechanism for moving the removeable de-powdering basket from the build box.

7. An apparatus for forming and de-powdering one or more parts formed by additive manufacturing, the apparatus comprising:
a de-powdering system configured to receive a build plate for additive manufacturing, wherein the de-powdering system is configured for use as a build box in a powder bed additive manufacturing system;
one or more apertures extending through at least one side of the de-powdering system; and
at least one panel movably coupled to the de-powdering system, wherein the at least one panel is configured to move between at least a first position and a second position,
wherein in the first position, the at least one panel extends along an exterior of the de-powdering system and blocks the one or more apertures,
wherein in the second position, the at least one panel exposes the one or more apertures, and
wherein the de-powdering system is transportable from the powder bed fabrication system to another location for de-powdering.

8. The apparatus of claim 7 , further comprising the build plate and one or more seals disposed on outer edges of the build plate, wherein the one or more seals are configured to form a barrier between the outer edges of the build plate and an interior of the de-powdering system.

9. The apparatus of claim 8 , further comprising an actuator coupled to a bottom of the build plate, wherein the actuator is movable to raise or lower the build plate within the de-powdering system, and wherein a bottom region of the enclosure includes an actuator aperture through which the actuator is configured to pass.

10. The apparatus of claim 7 , wherein the at least one side of the de-powdering system includes a screen, and wherein the one or more apertures extend through the screen.

11. The apparatus of claim 7 , wherein a screen forms an interior enclosure within at least a portion of the de-powdering system such that the interior enclosure is located between the build plate and the de-powdering system, wherein the at least one side of the de-powdering system includes a window, and wherein apertures in the screen align with the window.

12. The apparatus of claim 7 , wherein the at least one side of the de-powdering system includes a bottom wall and a plurality of side walls, and wherein each of the one or more apertures are formed by a void that extends through one of the plurality of side walls from an interior surface of the de-powdering system to an exterior surface of the de-powdering system.

13. The apparatus of claim 7 , wherein the at least one panel is movable between the first position and the second position via a hinge, and wherein the at least one panel includes a latch and/or press fit arrangement to retain the at least one panel in the first configuration when engaged.

14. A method for forming and de-powdering at least one part by additive manufacturing, the method comprising:
delivering a powder material and a binder material to a build plate to form at least one part, wherein the build plate is positioned within a de-powdering structure that includes one or more panels that are at least partially aligned with a plurality of apertures extending through a portion of the de-powdering structure, and wherein the build plate and de-powdering structure are arranged within a powder bed additive manufacturing system;
removing the de-powdering structure from the additive manufacturing system and transporting the de-powdering structure to another location for de-powdering; and
opening the one or more panels to thereby de-powder the at least one part by removing excess powder material from the at least one part such that the excess powder material passes through the plurality of apertures in the de-powdering structure.

15. The method of claim 14 , wherein the de-powdering step includes at least one of applying vibrations, delivering gas or liquid, or applying ultrasonic energy to the de-powdering structure.

16. The method of claim 14 , wherein the excess powder material is a steel powder, and wherein the de-powdering step includes delivering argon gas at a velocity of 2 mm per second to the de-powdering structure.

17. The method of claim 16 , wherein the one or more panels are movable between a first configuration in which the one or more panels block the one or more apertures and a second configuration in which the one or more apertures are exposed,
wherein the method further comprises, before delivering the argon gas, moving the one or more panels from the first configuration to the second configuration.

18. The method of claim 14 , further comprising applying a vacuum to the de-powdering structure to remove and collect at least a portion of the excess powder material.

19. The apparatus of claim 7 , comprising a plurality of apertures extending through the at least one side of the de-powdering system, wherein in the first position, the at least one panel blocks the plurality of apertures, and wherein in the second position, the at least one panel exposes the plurality of apertures.

Assignees

• Desktop Metal Inc

Inventors

• Jordan Glenn A

Classifications

• B29C64/255 Primary

  Enclosures for the building material, e.g. powder containers · CPC title

• B22F12/38

  Housings, e.g. machine housings · CPC title

• B22F12/70

  Gas flow means · CPC title

• B22F12/30

  Platforms or substrates · CPC title

• B22F12/22

  Driving means · CPC title