Apparatus and method for forming three-dimensional objects using a tilting solidification substrate

• US 10,011,076 B2
• Filed: 10/06/2014
• Issued: 07/03/2018
• Est. Priority Date: 02/20/2014
• Status: Active Grant

• Current Assignee: Gulf Filtration Systems Inc. (Desktop Metal, Inc.)
• Original Assignee: Gulf Filtration Systems Inc. (Desktop Metal, Inc.)
• Inventors: El-Siblani, Ali, Shkolnik, Alexandr
• Primary Examiner(s): Hindenlang, Alison L
• Application Number:
  US14/506,751
• Publication Number:
  US 20150231828A1
• Time in Patent Office: 1,366 Days
• CPC Class Codes: B29C 64/106 using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
• CPC Class Codes: B29C 64/124 using layers of liquid which are selectively solidified
• CPC Class Codes: B29C 64/153 using layers of powder being selectively joined, e.g. by selective laser sintering or melting
• CPC Class Codes: B29C 64/245 Platforms or substrates support structures intended to be sacrificed after manufacture B29C64/40
• CPC Class Codes: B29C 64/393 for controlling or regulating additive manufacturing processes
• CPC Class Codes: B29C 64/40 Structures for supporting 3D objects during manufacture and intended to be sacrificed after completion thereof
• CPC Class Codes: B29K 2827/12 containing fluorine
• CPC Class Codes: B29K 2883/005 LSR, i.e. liquid silicone rubbers, or derivatives thereof
• CPC Class Codes: B29K 2995/0026 Transparent
• CPC Class Codes: B29K 2995/0029 Translucent
• CPC Class Codes: B33Y 10/00 Processes of additive manufacturing
• CPC Class Codes: B33Y 30/00 Apparatus for additive manufacturing; Details thereof or accessories therefor
• CPC Class Codes: B33Y 50/02 for controlling or regulating additive manufacturing processes
• CPC Class Codes: B33Y 70/00 Materials specially adapted for additive manufacturing

Abstract

An apparatus and method for making a three-dimensional object from a solidifiable material using a linear solidification device is shown and described. The apparatus includes a solidification substrate assembly that is tiltable about a tilting axis to peel a solidification substrate from a recently formed object surface and to level the solidification substrate assembly and squeeze out accumulated solidifiable material between the solidification substrate and the recently formed object surface. Intelligent peeling and leveling may also be provided by providing a tilting parameter database that is used to adjust tilting parameters based on object geometry and/or solidifiable material properties.

Claims

1. A method of making a three-dimensional object from a solidifiable material, comprising:

solidifying a portion of the solidifiable material to create an exposed solidified object surface in contact with a solidification substrate;

tilting the solidification substrate about a first axis in accordance with at least one tilting parameter, wherein the at least one tilting parameter is based on at least one of object data representative of the three-dimensional object and the solidifiable material.

2. The method of claim 1, wherein the at least one tilting parameter is based on both object data representative of the three-dimensional object and the solidifiable material.

3. The method of any of claim 1, wherein the at least one tilting parameter is a minimum object peeling travel distance of a location on the exposed solidified object surface that is closest to the first axis in a direction along a second axis.

4. The method of claim 3, further comprising providing object data representative of the three-dimensional object, determining a position of an exposed object surface along the second axis that is closest to the first axis based on the object data, and determining an actuator peeling distance corresponding to the minimum object peeling travel distance starting from the determined position of the exposed surface along the second axis.

5. The method of claim 1, further comprising querying a tilting parameter database using a specified solidifiable material identifier, wherein the tilting parameter database comprises a plurality of solidifiable material identifiers, and each solidifiable material identifier is associated with a set of tilting parameters comprising the at least one tilting parameter.

6. The method of claim 5, further comprising activating an actuator in accordance with the set of tilting parameters, wherein the step of activating the actuator tilts the solidification substrate about the first axis.

7. The method of claim 1, wherein the at least one tilting parameter is at least one of a peeling velocity and a leveling velocity.

8. The method of claim 7, wherein the at least one tilting parameter includes a peeling velocity, and the step of tilting the solidification substrate about the first axis comprises tilting the solidification substrate about the first axis in a direction away from a build platform at a peeling velocity corresponding to the specified solidifiable material identifier.

9. The method of claim 7, wherein the at least one tilting parameter includes a leveling velocity, and the step of tilting the solidification substrate about the first axis comprises tilting the solidification substrate about the first axis in a direction toward a build platform at a leveling velocity corresponding to the specified solidifiable material identifier.

10. The method of claim 7, further comprising calculating an object exposed surface area and determining a value of the at least one tilting parameter based on the object exposed surface area.

11. The method of claim 1, wherein the solidifiable material has a viscosity at 25°

C. that is greater than 1500 cp.

12. A method of making a three-dimensional object from a solidifiable material, comprising:

solidifying a first layer of the solidifiable material in a first pattern corresponding to a first portion of the three-dimensional object to form a first solidified exposed object surface in contact with a solidification substrate, wherein the first layer of the solidifiable material is located between a build platform and the solidification substrate along a build axis;

first tilting the solidification substrate about a tilting axis in a direction away from the build platform;

moving the build platform away from the solidification substrate within a volume of the solidifiable material to provide a second layer of solidifiable material between the solidified exposed object surface and the solidification substrate;

second tilting the solidification substrate about the tilting axis in a direction toward the build platform; and

solidifying the second layer of the solidifiable material in a second pattern corresponding to a second portion of the three-dimensional object, wherein the step of first tilting the solidification substrate about a tilting axis in a direction away from the build platform comprises determining a tilt angle based on a selected solidifiable material identifier and tilting the solidification substrate about the tilting axis in the direction away from the build platform by the determined tilt angle.

13. The method of claim 12, further comprising providing an actuator operatively connected to the solidification substrate, wherein the actuator has an extended configuration and a retracted configuration, and the step of first tilting the solidification substrate about the tilting axis comprises adjusting the actuator from the retracted configuration to the extended configuration.

14. The method of claim 12, further comprising providing an actuator operatively connected to the solidification substrate, wherein the actuator has an extended configuration and a retracted configuration, and the step of second tilting the solidification substrate about the tilting axis comprises adjusting the actuator from the extended configuration to the retracted configuration.

15. The method of claim 12, further comprising providing an actuator operatively connected to the solidification substrate, wherein the actuator has an extended configuration and a retracted configuration, and the step of first tilting the solidification substrate about the tilting axis comprises adjusting the actuator from the extended configuration to the retracted configuration.

16. The method of claim 12, further comprising providing an actuator operatively connected to the solidification substrate, wherein the actuator has an extended configuration and a retracted configuration, and the step of second tilting the solidification substrate about the tilting axis comprises adjusting the actuator from the retracted configuration to the extended configuration.

17. The method of claim 12, wherein the solidification substrate is a rigid or semi-rigid solidification substrate.

18. The method of claim 12, wherein the solidification substrate is a film.

19. The method of claim 12, wherein the step of first tilting the solidification substrate about a tilting axis away from the build platform comprises first tilting a solidification substrate assembly comprising the solidification substrate and a film about the tilting axis in a direction away from the build platform.

20. The method of claim 12, wherein the step of first tilting the solidification substrate about a tilting axis in a direction away from the build platform comprises first tilting a solidification substrate assembly comprising the solidification substrate and a source of solidification energy about the tilting axis in the direction away from the build platform.

21. A method of making a three-dimensional object from a solidifiable material, comprising:

solidifying a first layer of the solidifiable material in a first pattern corresponding to a first portion of the three-dimensional object to form a first solidified exposed object surface in contact with a solidification substrate, wherein the first layer of the solidifiable material is located between a build platform and the solidification substrate along a build axis;

first tilting the solidification substrate about a tilting axis in a direction away from the build platform;

moving the build platform away from the solidification substrate within a volume of the solidifiable material to provide a second layer of solidifiable material between the solidified exposed object surface and the solidification substrate;

second tilting the solidification substrate about the tilting axis in a direction toward the build platform; and

solidifying the second layer of the solidifiable material in a second pattern corresponding to a second portion of the three-dimensional object, wherein the step of second tilting the solidification substrate about a tilting axis toward the build platform comprises determining a leveling velocity based on a selected solidifiable material identifier and tilting the solidification substrate about the tilting axis in the direction toward the build platform at the determined leveling velocity.

22. The method of claim 21, further comprising providing an actuator operatively connected to the solidification substrate, wherein the actuator has an extended configuration and a retracted configuration, and the step of first tilting the solidification substrate about the tilting axis comprises adjusting the actuator from the retracted configuration to the extended configuration.

23. The method of claim 21, further comprising providing an actuator operatively connected to the solidification substrate, wherein the actuator has an extended configuration and a retracted configuration, and the step of second tilting the solidification substrate about the tilting axis comprises adjusting the actuator from the extended configuration to the retracted configuration.

24. The method of claim 21, further comprising providing an actuator operatively connected to the solidification substrate, wherein the actuator has an extended configuration and a retracted configuration, and the step of first tilting the solidification substrate about the tilting axis comprises adjusting the actuator from the extended configuration to the retracted configuration.

25. The method of claim 21, further comprising providing an actuator operatively connected to the solidification substrate, wherein the actuator has an extended configuration and a retracted configuration, and the step of second tilting the solidification substrate about the tilting axis comprises adjusting the actuator from the retracted configuration to the extended configuration.

26. The method of claim 21, wherein the solidification substrate is a rigid or semi-rigid solidification substrate.

27. The method of claim 21, wherein the solidification substrate is a film.

28. The method of claim 21, wherein the step of first tilting the solidification substrate about a tilting axis away from the build platform comprises first tilting a solidification substrate assembly comprising the solidification substrate and a film about the tilting axis in a direction away from the build platform.

29. The method of claim 21, wherein the step of first tilting the solidification substrate about a tilting axis in a direction away from the build platform comprises first tilting a solidification substrate assembly comprising the solidification substrate and a source of solidification energy about the tilting axis in the direction away from the build platform.