Application of additive manufacturing processes to efficiently achieve higher levels of hardware integration

Patent metadata

Field	Value
Publication number	US-9339974-B2
Application number	US-201314049050-A
Country	US
Kind code	B2
Filing date	Oct 8, 2013
Priority date	Oct 8, 2013
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

A fused deposition modeling (FDM) extrusion head is configured to receive control signals from a controller. The FDM extrusion head receives a stream of thermofusible material into an input channel; forces the stream of thermofusible material into a liquefier channel using a mechanical driver; heats the stream of thermofusible material within the liquefier channel to a specified temperature above melting point of the thermofusible material; and receives the heated thermofusible material from an outlet of the liquefier channel and expels the heated thermofusible material through an extrusion tip. The controller determines at least one specified location to deposit the heated thermofusible material according to a coordinate system; cause the extrusion nozzle to selectively deposit a first layer of the heated thermofusible material onto a build platform; and after thermal fusion of the first layer is complete, vertically adjust the distance between the extrusion nozzle and the first layer; and select to deposit a second layer immediately on top of the first layer pause deposit a subassembly, or to pause to receive a subassembly onto at least a portion of the first layer.

First claim

What is claimed:

1. An apparatus, comprising:
a controller configured to transmit control signals to a fused deposition modeling (FDM) extrusion head, the FDM extrusion head comprising an extrusion nozzle configured to expel heated thermofusible material through an extrusion tip,
wherein the controller is configured to:
determine at least one specified location to deposit the heated thermofusible material according to a coordinate system,
cause the extrusion nozzle to selectively deposit a first layer of the heated thermofusible material onto a build platform,
in response to determining that thermal fusion of the first layer is complete, vertically adjust the distance between the extrusion nozzle and the first layer,
pause to receive a subassembly onto at least a portion of the first layer and a spacer on a portion of a top surface of the subassembly, and
cause the extrusion nozzle to deposit a second layer immediately on top of the spacer, wherein depositing the second layer fixes the spacer in physical contact with the top surface of the subassembly and fixes the subassembly between the spacer and the first layer.

2. The apparatus of claim 1 , wherein the controller is configured to: cause the extrusion nozzle to selectively deposit a third layer of the heated thermofusible material onto at least a portion of the received subassembly at a specified location according to the coordinate system.

3. The apparatus of claim 1 , wherein the subassembly is received onto at least the portion of the first layer by a robotic device placing the subassembly onto at least the portion of the first layer.

4. The apparatus of claim 1 , wherein the controller is configured to selectively move the FDM extrusion head, and wherein the selective move prevents collision of the subassembly with the apparatus.

5. The apparatus of claim 1 , wherein the subassembly comprises an optical component or an electrical component.

6. The apparatus of claim 1 , wherein the subassembly comprises a mechanical component.

7. The apparatus of claim 1 , wherein a portion of the subassembly projects vertically above a plane defining a top surface of the spacer, and the controller is configured to cause the FDM extrusion head to move nonlinearly around the projecting portion while depositing the second layer.

8. A system, comprising:
a controller; and
a fused deposition modeling (FDM) extrusion head configured to receive control signals from the controller, the FDM extrusion head comprising
an extrusion nozzle configured to expel heated thermofusible material through an extrusion tip;

wherein the controller is configured to:
determine at least one specified location to deposit the heated thermofusible material according to a coordinate system,
cause the extrusion nozzle to selectively deposit a first layer of the heated thermofusible material onto a build platform,
in response to determining that thermal fusion of the first layer is complete, vertically adjust the distance between the extrusion nozzle and the first layer,
pause to receive a subassembly onto at least a portion of the first layer and a spacer on a portion of a top surface of the subassembly, and
cause the extrusion nozzle to deposit a second layer immediately on top of the spacer, wherein depositing the second layer fixes the spacer in physical contact with the top surface of the subassembly and fixes the subassembly between the spacer and the first layer.

9. The system of claim 8 , wherein the controller is configured to: cause the extrusion nozzle to selectively deposit a third layer of the heated thermofusible material onto at least a portion of the received subassembly at a specified location according to the coordinate system.

10. The system of claim 8 , wherein the subassembly is received onto at least the portion of the first layer by a robotic device placing the subassembly onto at least the portion of the first layer.

11. The system of claim 8 , wherein the controller is configured to selectively move the FDM extrusion head, and wherein the selective move prevents collision of the subassembly with the FDM extrusion head.

12. The system of claim 8 , wherein the subassembly comprises an electrical component or an optical component.

13. The system of claim 8 , wherein the subassembly comprises a mechanical component.

14. The system of claim 8 , wherein the FDM extrusion head further comprises:
an input channel configured to receive a stream of thermofusible material;
a mechanical driver configured to, in response to activation, force the stream of thermofusible material into a liquefier channel;
a liquefier configured to heat the stream of thermofusible material within the liquefier channel to a specified temperature to form the heated thermofusible material, the specified temperature above a melting point of the thermofusible material.

15. The system of claim 8 , wherein a portion of the subassembly projects vertically above a plane defining a top surface of the spacer, and the controller is configured to cause the FDM extrusion head to move nonlinearly around the projecting portion while depositing the second layer.

16. A non-transitory computer-readable medium encoded with executable instructions for use with a controller and a fused deposition modeling (FDM) system comprising an extrusion nozzle configured to expel heated thermofusible material through an extrusion tip, the instructions when executed, cause processing circuitry within the controller to:
determine at least one specified location to deposit the heated thermofusible material according to a coordinate system,
cause the extrusion nozzle to selectively deposit a first layer of the heated thermofusible material onto a build platform,
in response to determining that thermal fusion of the first layer is complete, vertically adjust the distance between the extrusion nozzle and the first layer,
pause to receive a subassembly onto at least a portion of the first layer and a spacer on a portion of a top surface of the subassembly, and
cause the extrusion nozzle to deposit a second layer immediately on top of the spacer, wherein depositing the second layer fixes the spacer in physical contact with the top surface of the subassembly and fixes the subassembly between the spacer and the first layer.

17. The computer-readable medium of claim 16 , wherein the subassembly is received onto at least the portion of the first layer by a robotic device placing the subassembly onto at least the portion of the first layer.

18. The computer-readable medium of claim 16 , further comprising instructions that cause the FDM system to: selectively move the FDM extrusion head, wherein the selective move prevents collision of the subassembly with the apparatus.

19. The computer-readable medium of claim 16 , wherein the subassembly comprises an optical component or an electrical component.

20. The computer-readable medium of claim 16 , wherein the subassembly comprises a mechanical component.

Assignees

• Raytheon Co

Inventors

• Spalt Geoffrey Chad

Classifications

• B29C64/393

  for controlling or regulating additive manufacturing processes · CPC title

• B33Y30/00 Primary

  Apparatus for additive manufacturing; Details thereof or accessories therefor · CPC title

• B29C64/118 Primary

  using filamentary material being melted, e.g. fused deposition modelling [FDM] · CPC title

• B33Y50/02

  for controlling or regulating additive manufacturing processes · CPC title

• B29C67/0088 Primary

  Operations & Transport · mapped topic