Powder module

Patent metadata

Field	Value
Publication number	US-11141789-B2
Application number	US-201816144565-A
Country	US
Kind code	B2
Filing date	Sep 27, 2018
Priority date	Nov 3, 2017
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

Powder module (1) for an apparatus for additively manufacturing three-dimensional objects, the powder module (1) comprising a powder chamber (6) having a power chamber volume (7) and a carrying device (9), the carrying device (9) comprising: a carrying unit (8) being moveably supported along a motion axis between a first position, particularly a lower end position, and a second position, particularly an upper end position, relative to the powder chamber (6), a drive unit (10) for generating a drive force for moving the carrying unit (8) between the first position and the second position or vice versa, a coupling unit (11) for coupling the carrying unit (8) with the drive unit (10), and a second extension state, particularly corresponding to the second position of the carrying unit (8), a guiding unit (12) surrounding the coupling unit (11).

First claim

The invention claimed is:

1. A powder module, comprising:
a powder chamber and a carrying device disposed within the powder chamber, the carrying device comprising:
a build plate moveably supported along a build plate-motion axis between a first position and a second position relative to the powder chamber;
a motor configured to generate a drive force for moving the build plate between the first position and the second position or vice versa;
a drive train component configured to transmit a drive force to the build plate from the motor;
a housing surrounding the drive train component, the housing configured to stabilize the build plate in a horizontal orientation relative to the powder chamber;
an inner space defined between the housing and the drive train component; and
a sensor disposed within the inner space defined between the housing and the drive train component;
wherein the drive train component and the housing are respectively extendable between a non-extended state corresponding to the first position of the build plate and an extended state corresponding to the second position of the build plate; and
wherein the sensor is configured to determine a motion and/or a position of the build plate.

2. The powder module of claim 1 , wherein the drive train component comprises a plurality of coupling segments moveably supported relative to one another other along a drive train component motion axis between a first coupling arrangement corresponding to the non-extended state of the drive train component and a second coupling arrangement corresponding to the extended state of the drive train component.

3. The powder module of claim 2 , wherein at least two of the plurality of coupling segments at least partly overlap one another in the direction of the drive train component motion axis.

4. The powder module of claim 2 , wherein the plurality of coupling segments is arranged in a telescopic arrangement.

5. The powder module of claim 1 , wherein the housing comprises a plurality of guiding segments moveably supported relative to one another along a housing motion axis between a first housing arrangement corresponding to the non-extended state of the housing and a second housing arrangement corresponding to the extended state of the housing.

6. The powder module of claim 5 , wherein at least two of the plurality of guiding segments at least partly overlap one another in the direction of the housing motion axis.

7. The powder module of claim 5 , wherein the plurality of housing segments is arranged in a telescopic arrangement.

8. The powder module of claim 5 , comprising a sealing unit configured to seal gap between one or more adjacent pairs of housing segments, the sealing unit comprising at least one sealing element disposed between the one or more adjacent pairs of housing segments.

9. The powder module of claim 8 , wherein respective ones of the at least one sealing element comprises a sealing lip extending between an outer wall portion of a first housing segment and an inner wall portion of a second housing segment.

10. The powder module of claim 8 , wherein respective ones of the at least one sealing element comprises a sealing brush extending between an outer wall portion of a first housing segment and an inner wall portion of a second housing segment.

11. The powder module of claim 10 , wherein the sealing unit comprises a plurality of sealing elements, the plurality of sealing elements comprising a first sealing element comprising a receptacle defined by a first housing segment, and a second sealing element comprising a protrusion defined by a second housing segment, the receptacle defined by the first housing segment configured to receive the protrusion defined by the second housing segment.

12. The powder module of claim 1 , wherein the sensor comprises an optical sensor.

13. An apparatus for additively manufacturing three-dimensional objects, the apparatus comprising:
a powder module, the powder module comprising a powder chamber and a carrying device disposed within the powder chamber, the carrying device comprising:
a build plate moveably supported along a build plate-motion axis between a first position and a second position relative to the powder chamber;
a motor configured to generate a drive force for moving the build plate between the first position and the second position or vice versa;
a drive train component configured to transmit a drive force to the build plate from the motor;
a housing surrounding the drive train component, the housing configured to stabilize the build plate in a horizontal orientation relative to the powder chamber, the housing and the drive train component defining an inner space therebetween; and
a sensor disposed within the inner space defined between the housing and the drive train component;
wherein the drive train component and the housing are respectively extendable between a non-extended state corresponding to the first position of the build plate and an extended state corresponding to the second position of the build plate; and
wherein the sensor is configured to determine a motion and/or a position of the build plate.

14. The apparatus of claim 13 , wherein the drive train component comprises a plurality of coupling segments moveably supported relative to one another other along a drive train component motion axis between a first coupling arrangement corresponding to the non-extended state of the drive train component and a second coupling arrangement corresponding to the extended state of the drive train component; and
wherein the housing comprises a plurality of housing segments moveably supported relative to one another along a housing motion axis between a first housing arrangement corresponding to the non-extended state of the housing and a second housing arrangement corresponding to the extended state of the housing.

15. The apparatus of claim 14 , wherein at least two of the plurality of coupling segments at least partly overlap one another in the direction of the drive train component motion axis.

16. The apparatus of claim 14 , wherein the plurality of coupling segments is arranged in a telescopic arrangement; and wherein the housing segments are arranged in a telescopic arrangement.

17. The apparatus of claim 14 , comprising a sealing unit configured to seal gap between one or more adjacent pairs of housing segments, the sealing unit comprising at least one sealing element disposed between the one or more adjacent pairs of housing segments.

18. The apparatus of claim 17 , wherein respective ones of the at least one sealing element comprises:
a sealing lip extending between an outer wall portion of a first housing segment and an inner wall portion of a second housing segment; and
a sealing brush extending between an outer wall portion of a first housing segment and an inner wall portion of a second housing segment.

19. The apparatus of claim 17 , wherein the sealing unit comprises a plurality of sealing elements, the plurality of sealing elements comprising a first sealing element comprising a receptacle defined by a first housing segment, and a second sealing element comprising a protrusion defined by a second housing segment, the receptacle defined by the first housing segment configured to receive the protrusion defined by the second housing segment.

20. The apparatus of claim 13 , wherein the sensor comprises an optical sensor.

Assignees

• Concept Laser Gmbh

Inventors

• Stammberger Jens
• Hofmann Alexander
• Jäger Olaf
• Stache Lukas

Classifications

• B29C64/153 Primary

  using layers of powder being selectively joined, e.g. by selective laser sintering or melting · CPC title

• B22F12/90

  Means for process control, e.g. cameras or sensors · CPC title

• B22F12/38

  Housings, e.g. machine housings · CPC title

• B22F12/30

  Platforms or substrates · CPC title

• B22F12/224

  for motion along a direction within the plane of a layer · CPC title