Systems and methods for implementing high speed final surface curing for three dimensional (3D) printed parts and components

Patent metadata

Field	Value
Publication number	US-10160194-B2
Application number	US-201514637249-A
Country	US
Kind code	B2
Filing date	Mar 3, 2015
Priority date	Mar 3, 2015
Publication date	Dec 25, 2018
Grant date	Dec 25, 2018

Abstract

A system and method are provided for implementing a comparatively higher speed process for surface curing of finished three-dimensional (3D) printed parts, objects and/or components, formed and/or otherwise manufactured in 3D printing systems and/or in additive material manufacturing processes. A vacuum finish curing chamber is provided within, or associated with one or more 3D printers to provide a locally-generated substantially oxygen depleted curing environment to support effective and efficient surface curing of one or more formed 3D printed parts. The vacuum finish curing system includes at least one device for emitting curing radiation and at least one object transport system for transporting formed 3D objects to the vacuum finish curing chamber without requiring user handling that would be hazardous to handling individuals.

First claim

We claim:

1. A system for producing three-dimensional (3D) printed parts, comprising:
a material deposition device configured to deposit layers of UV curable inks on an object forming base to form a 3D printed part;
an enclosed curing chamber in which formed 3D printed parts are placed to be finish cured in an oxygen depleted environment, the enclosed curing chamber including at least (1) a closable input opening through which formed 3D printed parts are admitted into the enclosed curing chamber and (2) a vacuum device for drawing a vacuum in the enclosed curing chamber once the closable input opening is sealed;
a first curing device interposed between the material deposition device and the enclosed curing chamber in a process direction, the first curing device curing one or more of the deposited layers in the process of forming the 3D printed part;
a second curing device associated with the enclosed curing chamber that emits curing energy to finish cure the UV curable inks of the formed 3D printed parts in the enclosed curing chamber once the vacuum is drawn in the enclosed curing chamber; and
a printed part transport device that transports the formed 3D printed parts from the material deposition device to the enclosed curing chamber, the printed part transport device being a conveyor transport component, the conveyor component cycling at least one of the 3D printed parts between the material deposition device and the first curing device during the forming of the at least one of the 3D printed parts to successively deposit the layers and to cure one or more of the deposited layers.

2. The system of claim 1 , the conveyor transport component transporting at least one of the formed 3D printed parts to the enclosed curing chamber and supporting the at least one of the formed 3D printed parts in the enclosed curing chamber.

3. The system of claim 1 , the printed part transport device being a robotic arm component.

4. The system of claim 3 , the enclosed curing chamber being located separately from material deposition devices in a plurality of 3D printers, and
the robotic arm component transporting the formed 3D printed parts from the plurality of 3D printers to the enclosed curing chamber.

5. The system of claim 1 , the second curing device being located within the enclosed curing chamber.

6. The system of claim 1 , the enclosed curing chamber including at least one radiation transmissive surface,
the second curing device being located external to the enclosed curing chamber and configured to direct the curing energy emitted from the second curing device through the at least one radiation transmissive surface of the enclosed curing chamber to impinge on the formed 3D printed parts.

7. The system of claim 1 , the second curing device comprising at least one of a lamp, a laser, and a light emitting diode (LED).

8. A method for producing 3D printed parts, comprising:
depositing layers of UV curable inks with a material deposition device onto an object forming base to form a 3D printed part in a 3D printer;
transporting formed 3D printed parts, using a transport device, from a vicinity of the material deposition device through an input portal in a curing chamber;
pre-curing, with a first curing device interposed between the material deposition device and the curing chamber in a process direction, the one or more of the deposited layers in the process of forming the 3D printed part, the transport device being a conveyor transport component, the conveyor component cycling at least one of the 3D printed parts between the material deposition device and the first curing device during the forming of the at least one of the 3D printed parts to successively deposit the layers and to cure one or more of the deposited layers;
sealing the input portal in the curing chamber to enclose the formed 3D printed parts in the curing chamber;
applying a vacuum to remove the air from the curing chamber to provide an oxygen depleted curing environment in the curing chamber;
finish curing surfaces of the formed 3D printed parts in the oxygen depleted curing environment in the curing chamber by exposing the surfaces of the formed 3D printed parts to curing energy emitted from a second curing device; and
removing the finish cured 3D printed parts from the curing chamber with the transport device.

9. The method of claim 8 , further comprising transporting at least one of the formed 3D printed parts to the curing chamber with the conveyor transport component, and supporting the at least one of the formed 3D printed parts in the curing chamber with the conveyor transport component.

10. The method of claim 8 , the transport device being a robotic arm component.

11. The method of claim 10 , the curing chamber being located separately from material deposition devices in a plurality of 3D printers, and
the robotic arm component transporting the formed 3D printed parts from the plurality of 3D printers to the curing chamber.

12. The method of claim 8 , the second curing device being located within the curing chamber.

13. The method of claim 8 , the curing chamber including at least one radiation transmissive surface,
the second curing device being located external to the curing chamber and directing the curing energy through the at least one radiation transmissive surface of the curing chamber to impinge on the surface of the formed 3D printed parts in the curing chamber.

14. The method of claim 8 , the second curing device comprising at least one of a lamp, a laser, and an LED.

15. A non-transitory computer readable medium storing instructions that, when executed by a processor, cause the processor to execute the steps of a method for producing 3D printed parts in a 3D printer, the method comprising:
controlling a material deposition device configured to deposit layers of UV curable inks onto an object forming base to form a 3D printed part in a 3D printer;
controlling movement of a transport device to transport formed 3D printed parts from a vicinity of the material deposition device through an input portal in a curing chamber;
activating a first curing device to pre-cure one or more of the deposited layers in the process of forming the 3D printed part pre-curing, the first curing device interposed between the material deposition device and the curing chamber in a process direction, the transport device being a conveyor transport component, the conveyor component cycling at least one of the 3D printed parts between the material deposition device and the first curing device during the forming of the at least one of the 3D printed parts to successively deposit the layers and to cure one or more of the deposited layers;
directing the sealing of the input portal in the curing chamber to enclose the formed 3D printed parts in the curing chamber;
activating a vacuum device to draw a vacuum removing the air from the curing chamber to provide an oxygen depleted curing environment in the curing chamber;
activating a second curing device to finish cure surfaces of the formed 3D printed parts in the oxygen depleted curing environment in the curing chamber by exposing the surfaces of the formed 3D printed parts to curing energy emitted from the second curing device; and
controlling movement of the transport device to remove the finish cured 3D printed parts from the curing chamber.

16. The non-transitory computer readable medium of claim 15 , the method further comprising controlling movement of the conveyor transport component to transport at least one of the formed 3D printed parts to the curing chamber and support the at

Assignees

• Xerox Corp

Inventors

• Atwood Christopher
• Crossen Elizabeth

Classifications

• B29C2791/006

  Using vacuum · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title

• B29C71/04 Primary

  by wave energy or particle radiation {, e.g. for curing or vulcanising preformed articles (during moulding, e.g. in a mould B29C35/08)} · CPC title

• B29C2035/0838

  using laser · CPC title

• B29C2035/0827

  using UV radiation · CPC title