Methods for depositing an extrudable substance onto a surface

Patent metadata

Field	Value
Publication number	US-11279073-B2
Application number	US-202016999279-A
Country	US
Kind code	B2
Filing date	Aug 21, 2020
Priority date	Dec 21, 2017
Publication date	Mar 22, 2022
Grant date	Mar 22, 2022

Abstract

A method of depositing an extrudable substance onto a surface comprises (1) with a cartridge positioned inside a sleeve between an inner tubular sleeve wall and an outer tubular sleeve wall, circumscribing the inner tubular sleeve wall, and also positioned between a push-lock pressure cap, hermetically coupled with the cartridge, and a valve, communicatively coupled with the cartridge, linearly moving an annular plunger, received between an inner tubular cartridge wall and an outer tubular cartridge wall, circumscribing the inner tubular cartridge wall, toward the valve along a first axis to urge the extrudable substance from the cartridge, through the valve, and out of a nozzle that is communicatively coupled with the valve; and (2) controlling flow of the extrudable substance from the valve to the nozzle.

First claim

What is claimed is:

1. A method of depositing an extrudable substance onto a surface, the method comprising steps of:
with a cartridge positioned inside a sleeve between an inner tubular sleeve wall and an outer tubular sleeve wall, circumscribing the inner tubular sleeve wall, and also positioned between a push-lock pressure cap, hermetically coupled with the cartridge, and a valve, communicatively coupled with the cartridge, linearly moving an annular plunger, received between an inner tubular cartridge wall and an outer tubular cartridge wall, circumscribing the inner tubular cartridge wall, toward the valve along a first axis to urge the extrudable substance from the cartridge, through the valve, and out of a nozzle that is communicatively coupled with the valve; and
controlling flow of the extrudable substance from the valve to the nozzle.

2. The method according to claim 1 , further comprising, with the sleeve coupled to a bracket, selectively rotating the sleeve relative to the bracket about the first axis to controllably position the nozzle relative to the surface.

3. The method according to claim 2 , further comprising detecting when the sleeve is in a predetermined rotational orientation relative to the bracket by actuating a proximity sensor, located proximate to the sleeve, with a homing element, located on the sleeve.

4. The method according to claim 2 , further comprising, with the bracket coupled to a robot interface that is coupled to a robot, selectively linearly moving the bracket relative to the robot interface along the first axis.

5. The method according to claim 1 , further comprising a step of releasably locking the push-lock pressure cap to the sleeve.

6. The method according to claim 5 , wherein the step of releasably locking the push-lock pressure cap to the sleeve comprises a step of moving spring-loaded latches of the push-lock pressure cap relative to the sleeve into a locked position, in which the spring-loaded latches are engaged with the sleeve.

7. The method according to claim 6 , wherein the step of moving the spring-loaded latches into the locked position comprises pushing a keeper of each one of the spring-loaded latches into a locking aperture in the sleeve with a latch spring, coupled to the keeper.

8. The method according to claim 7 , further comprising a step of unlocking the push-lock pressure cap from the sleeve.

9. The method according to claim 8 , wherein the step of unlocking the push-lock pressure cap from the sleeve comprises a step of moving the spring-loaded latches of the push-lock pressure cap relative to the sleeve into an unlocked position, in which the spring-loaded latches are disengaged from the sleeve.

10. The method according to claim 9 , wherein the step of moving the spring-loaded latches into the unlocked position comprises pushing the keeper of each one of the spring-loaded latches out of the locking aperture, formed in the sleeve, by rotating a cam about the first axis.

11. The method according to claim 10 , further comprising, with the push-lock pressure cap removed from the sleeve, at least partially ejecting the cartridge from the sleeve through an annular sleeve end-opening that separates the inner tubular sleeve wall and the outer tubular sleeve wall.

12. The method according to claim 5 , further comprising, with the push-lock pressure cap releasably locked to the sleeve, controlling a flow rate of the extrudable substance through the valve.

13. The method according to claim 12 , wherein controlling the flow rate of the extrudable substance through the valve is based, at least in part, on at least one of a temperature or a pressure of the extrudable substance, located within the valve.

14. The method according to claim 13 , further comprising:
determining the temperature of the extrudable substance, flowing through the valve; and
based on the temperature of the extrudable substance, linearly moving the annular plunger along the first axis toward the valve to control the flow rate of the extrudable substance through the valve.

15. The method according to claim 13 , further comprising:
determining the pressure of the extrudable substance, flowing through the valve; and
based on the pressure of the extrudable substance, linearly moving the annular plunger along the first axis toward the valve to control the flow rate of the extrudable substance through the valve.

16. The method according to claim 1 , wherein the step of controlling the flow of the extrudable substance from the valve to the nozzle comprises actuating a linear actuator, coupled to the valve, to move a first plug of the linear actuator into one of an open position, in which the first plug is positioned beyond a valve outlet port of the valve, or a closed position, in which the first plug is positioned within the valve outlet port.

17. The method according to claim 16 , further comprising:
detecting when a piston of the linear actuator is in an extended position to indicate that the first plug is in the open position; and
detecting when the piston of the linear actuator is in a retracted position to indicate that the first plug is in the closed position.

18. The method according to claim 16 , wherein moving the first plug from the open position to the closed position draws the extrudable substance, flowing out of the valve outlet port, back into the valve.

19. The method according to claim 1 , further comprising a step of releasably locking the valve to a valve-locking assembly, which is coupled to the sleeve, so that a valve inlet port of a first valve-body portion of the valve is communicatively coupled with a cartridge outlet port of the cartridge and a second valve-body portion of the valve is positioned within the inner tubular sleeve wall.

20. The method according to claim 19 , wherein the step of releasably locking the valve to the valve-locking assembly further comprises:
inserting the valve within an annular valve interface of the valve-locking assembly; and
rotating a twist-ring of the valve-locking assembly about the first axis relative to the annular valve interface.

Assignees

• Boeing Co

Inventors

• Pringle Iv John W
• Tomuta Raul
• Erickson Chris J

Classifications

• B65D83/763

  the piston being actuated by a reciprocating axial motion of a shaft which engages the piston, e.g. using a ratchet mechanism · CPC title

• B29C48/92 Primary

  Measuring, controlling or regulating · CPC title

• B33Y10/00

  Processes of additive manufacturing · CPC title

• B29C48/2556

  provided in or in the proximity of dies (B29C48/302, B29C48/31, B29C48/325 take precedence) · CPC title

• B05C5/0216

  by relative movement of article and outlet according to a predetermined path · CPC title