System and method for processing composite material

Patent metadata

Field	Value
Publication number	US-10919240-B2
Application number	US-201815902589-A
Country	US
Kind code	B2
Filing date	Feb 22, 2018
Priority date	Feb 22, 2018
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

An example system for processing composite material includes a cure tool, a source of pressurized gas, and a vacuum bag forming an enclosed volume between the cure tool and the vacuum bag. The system further includes composite material positioned on the cure tool within the enclosed volume. The source of pressurized gas is configured to inflate the vacuum bag, thereby moving a portion of the vacuum bag away from the cure tool and the composite material. An example method includes placing composite material onto a cure tool, placing a vacuum bag over the composite material and the cure tool to form an enclosed volume between the cure tool and the vacuum bag, processing the composite material while the composite material is within the enclosed volume, and inflating the vacuum bag to move a portion of the vacuum bag away from the cure tool and the composite material.

First claim

What is claimed is:

1. A system for processing composite material, the system comprising:
a cure tool;
a source of pressurized gas;
a vacuum bag forming an enclosed volume between the cure tool and the vacuum bag;
composite material positioned on the cure tool within the enclosed volume; and
an ionizer configured to receive pressurized gas from the source of pressurized gas and provide ionized gas to the enclosed volume.

2. The system of claim 1 , wherein the cure tool comprises a contoured surface configured to shape the composite material.

3. The system of claim 1 , wherein the source of pressurized gas comprises one or more of a pump or a storage tank.

4. The system of claim 1 , wherein the vacuum bag comprises one or more of plastic, polytetrafluoroethylene, or nylon.

5. The system of claim 1 , wherein the composite material comprises a carbon-fiber reinforcement and a thermoset matrix.

6. The system of claim 1 , further comprising a pressure assembly configured to:
receive the pressurized gas from the source of pressurized gas, and
provide the pressurized gas to the enclosed volume at a gauge pressure within a range of 0 to 10 pounds per square inch (psi).

7. The system of claim 1 , further comprising a bleed valve configured to release gas from the enclosed volume in response to a gas pressure within the enclosed volume exceeding a threshold.

8. The system of claim 1 , wherein the source of pressurized gas is configured to inflate the vacuum bag, thereby moving a portion of the vacuum bag away from the cure tool and the composite material.

9. A system for processing composite material, the system comprising:
a cure tool;
a source of pressurized gas;
a vacuum bag forming an enclosed volume between the cure tool and the vacuum bag;
composite material positioned on the cure tool within the enclosed volume; and
a gas filter configured to receive gas from the enclosed volume and filter the gas to remove particulates, volatiles, or vapors from the gas.

10. The system of claim 9 , wherein the gas filter comprises a carbon adsorption filter.

11. The system of claim 9 , wherein the source of pressurized gas is configured to inflate the vacuum bag, thereby moving a portion of the vacuum bag away from the cure tool and the composite material.

12. A method for processing composite material, the method comprising:
placing composite material onto a cure tool;
placing a vacuum bag over the composite material and the cure tool to form an enclosed volume between the cure tool and the vacuum bag;
processing the composite material while the composite material is within the enclosed volume;
receiving pressurized gas from a source of pressurized gas; and
providing ionized gas to the enclosed volume, thereby inflating the vacuum bag to move a portion of the vacuum bag away from the cure tool and the composite material.

13. The method of claim 12 , further comprising evacuating gas from the enclosed volume before processing the composite material.

14. The method of claim 12 , further comprising removing at least a portion of the vacuum bag from the cure tool and the composite material after the vacuum bag is inflated.

15. The method of claim 12 , further comprising placing one or more intermediate layers on the composite material before placing the vacuum bag over the composite material,
wherein placing the vacuum bag over the composite material comprises placing the vacuum bag over the composite material and the one or more intermediate layers.

16. The method of claim 15 , wherein inflating the vacuum bag causes the vacuum bag to separate from the one or more intermediate layers.

17. The method of claim 12 , wherein providing the ionized gas causes neutralization of at least some static electricity within the vacuum bag.

18. The method of claim 12 , further comprising:
releasing gas from the enclosed volume after inflating the vacuum bag; and
after releasing the gas, filtering the gas to remove particulates, volatiles, or vapors from the gas.

19. The method of claim 12 , wherein inflating the vacuum bag comprises inflating the vacuum bag with gas having a gauge pressure within a range of 0 to 10 pounds per square inch (psi).

20. An apparatus for processing composite material, the apparatus comprising:
a pressure assembly configured to receive pressurized gas from a source of pressurized gas and provide the pressurized gas, at a predetermined pressure, to an enclosed volume formed between a vacuum bag and a cure tool;
an ionizer configured to receive pressurized gas from the source of pressurized gas, ionize the pressurized gas, and provide the pressurized gas to the enclosed volume after the pressurized gas has been ionized;
a bleed valve configured to release gas from the enclosed volume in response to a gas pressure within the enclosed volume exceeding a threshold; and
a gas filter configured to receive gas from the enclosed volume and filter the gas to remove particulates, volatiles, or vapors from the gas.

Assignees

• Boeing Co

Inventors

• Rotter Daniel M
• Coxon Brad A
• Shephard Patrick J
• Deyo Nicholas W
• Syverson Darren L
• Khomyak Aleksandr A
• Fritzgerald Martin P
• Brazil Erik M
• Lockhart Iii Harrison B

Classifications

• C08J5/04

  Reinforcing macromolecular compounds with loose or coherent fibrous material · CPC title

• B29C70/44 Primary

  using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding · CPC title

• B29C33/46

  using fluid pressure · CPC title

• B29K2101/10

  Thermosetting resins · CPC title

• B29C2791/006

  Using vacuum · CPC title