A device indicates the location of an air leak in a vacuum bag used to process composite parts. The device includes a layer of material on the inner face of the bag that changes in appearance due to an oxidation-reduction reaction in areas of the layer exposed to oxygen caused by a leak in the bag.
대표청구항▼
1. A device for indicating the location of an air leak in a vacuum bag assembly used to compact composite parts, comprising: a sheet of the vacuum bag, the sheet having an inner face, the bag receiving a vacuum applied on the inner face, the vacuum bag positioned over a tool; anda material incorpora
1. A device for indicating the location of an air leak in a vacuum bag assembly used to compact composite parts, comprising: a sheet of the vacuum bag, the sheet having an inner face, the bag receiving a vacuum applied on the inner face, the vacuum bag positioned over a tool; anda material incorporated into the vacuum bag such that the material is integral with the vacuum bag, the vacuum bag and material forming a single layer, the material configured to transition from a first color to a second color upon activation, and from the second color to a third color due to an oxidation-reduction reaction in areas of the material exposed to oxygen, the material comprising an oxygen permeable polymer binder, semiconductor nanoparticles dispersed in the binder, an electron donor material, and a reduction-oxidation indicator material, the material configured to transition to the third color upon air leaking into the vacuum bag assembly through the vacuum bag, through the tool, or through the vacuum bag and the tool wherein the first color is blue, the second color is colorless, and the third color is green. 2. The device of claim 1, wherein the material is an ink that changes from a substantially colorless state to a color in the exposed areas of the layer as a result of the oxidation-reduction reaction. 3. The device of claim 1, wherein the semiconductor nanoparticles are one of TiO2,SiC, ZnS, GaN, and Ta2O5; the electron donor material is glycerol; andthe reduction-oxidation indicator material is indigotetrasulfonate. 4. The device of claim 1, wherein the material is a printed ink. 5. The device of claim 1, further comprising a radiation source configured to emit the ultraviolet light. 6. The device of claim 1, further comprising a vacuum source for drawing a vacuum in the vacuum bag. 7. The device of claim 1, wherein the first color is blue, the second color is colorless, and the third color is green. 8. The device of claim 1, wherein the leak is through the tool. 9. A method of detecting leaks in a transparent vacuum bag used to process parts, comprising: incorporating a material into the bag, the material being integral with the bag so that the material and the bag form a single layer, and configured to change appearance in the area of an air leak in the bag, the material comprising an oxygen permeable polymer binder, semiconductor nanoparticles dispersed in the binder, an electron donor material, and a reduction-oxidation indicator material;positioning the bag over a tool;evacuating air from the bag;activating the material with UV light to form an activated material such that the material transitions from a first color to substantially transparent, the activated material configured to react with oxygen in the air entering the bag through a leak and thereby to transition to a third color, the third color being a visible color, wherein the first color is blue, the second color is colorless, and the third color is green; andvisually observing for changes in the appearance of the layer of material viewed through the bag caused by an air leak through the bag, through the tool, or through the bag and the tool. 10. The method of claim 9, wherein activating the material is performed after the bag has been substantially evacuated of air. 11. The method of claim 9, wherein the step of incorporating the material comprises co-extruding the material into the bag such that the material is integral with the bag. 12. The method of claim 9, wherein the first color is blue and the third color is green. 13. The method of claim 9, wherein the leak is through the tool. 14. A method of detecting leaks in a substrate, comprising: incorporating a material into a substantially transparent bag such that the material is integral with the bag in a single layer, the material configured to transition from a first color to a second color with activation by UV light, the second color corresponding to an oxygen reactive state in which the second color of the material is further configured to change to a third color in response to the exposure of the material to oxygen, wherein the first color is blue, the second color is colorless, and the third color is green, the material comprising an oxygen permeable polymer binder, semiconductor nanoparticles dispersed in the binder, an electron donor material, and a reduction-oxidation indicator material;sealing the bag over the substrate;generating a vacuum within the sealed bag;activating the material to its oxygen responsive state with UV light; anddetecting leaks in the substrate by visually observing for localized changes in the color of the material. 15. The method of claim 14, wherein incorporating a material is performed by co-extruding the material along with the bag such that the material is integral with the bag. 16. The method of claim 14, wherein activating the material is performed after the vacuum has been generated within the bag. 17. The method of claim 14, wherein subjecting the material to UV light includes passing the light through the transparent vacuum bag. 18. The method of claim 14, wherein the step of sealing further comprises placing a composite part on the substrate and sealing the bag over the composite part on the substrate. 19. The method of claim 14, wherein the step of activating further comprises emitting ultraviolet light from a radiation source. 20. The method of claim 14, wherein the electron donor material is glycerol; and the reduction-oxidation indicator material is indigotetrasulfonate. 21. The method of claim 14, wherein the semiconductor nanoparticles are one of TiO2, SiC, ZnS, GaN, and Ta2O5.
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Hunt James (King County WA), Aerodynamic structures of composite construction.
Chase Vance A. (Oxford CT) Scarpati Thomas S. (Madison CT), All composite article of manufacture including first and second composite members joined by a composite hinge.
Chapman,Michael R.; Watson,Robert M.; Anderson,Donald A.; Piehl,Marc J.; Sweetin,Joseph L.; Grose,Douglas L., Composite sections for aircraft fuselages and other structures, and methods and systems for manufacturing such sections.
Yates Derek N. (Los Gatos CA) Presta John C. (San Jose CA), Fiber reinforced composite shaft with metallic connector sleeves mounted by a knurl interlock.
Asai, Keisuke; Nishide, Hiroyuki, Functional polymer with supported pressure-sensitive luminophore, and pressure-sensitive paint and pressure-sensitive element using same.
Morizot Richard A. P. (Villemer FRX) Nioche Jean-Yves M. (St Maurice Montcouronne FRX), Installation for the production by draping of multilayer structures formed from composite materials.
Carver Larry L. (Manhattan Beach CA) Zamzow Charles E. (Rancho Palos Verdes CA) Mladenoff Donald D. (Alta Loma CA) Lovrien Glenn A. (Bellflower CA), Integrated aircraft manufacturing system.
Ahrens, James M.; Domanski, Daniel; Hornor, John A.; Hughes, Ruth; Landini, Dennis James; Matsumoto, Roger Lee Ken; Wang, Hongyu; Brenner, Troy Frederick, Integrated apparatus and method for filling porous composite preforms.
Carver Larry L. (Manhattan Beach CA) Zamzow Charles E. (Rancho Palos Verdes CA) Mladenoff Donald D. (Alta Loma CA) Lovrien Glenn A. (Bellflower CA), Integrated manufacturing system.
Seemann ; III William H. ; Tunis ; III George C. ; Perrella Andrew P. ; Haraldsson Rikard K. ; Everitt William E. ; Pearson Everett A., Large composite structures and a method for production of large composite structures incorporating a resin distribution.
Seemann ; III William H. ; Tunis ; III George C. ; Perrella Andrew P. ; Haraldsson Rikard K. ; Everitt William E. ; Pearson Everett A., Large composite structures incorporating a resin distribution network.
Browning Charles E. (Dayton OH) Reinhart ; Jr. Theodore J. (Dayton OH), Low flow, vacuum bag curable prepreg material for high performance composite systems.
Joachim Lehmker DE; Karl-Heinz Muehlnickel DE; Udo-Henning Stoewer DE; Ruediger Vollmerhaus DE, Method and apparatus for assembling a three-dimensional structural component.
Avila Steven J. (Federal Way WA) Reid Charles R. (Seattle WA), Method and apparatus for preparing specimens for destructive testing of graphite epoxy composite material.
Dublinski Alex C. (Northford CT) Evans David A. (Chelmsford MA) Goldberg Joseph (Easton CT) Davis Geoffrey C. R. (Madison CT) Sharp ; Jr. ; William (Haddam CT) Kornitzky Michael A. (Branford CT), Method for forming complex composite articles.
Prichard,Alan K.; Stuhr,Victor K.; Olivadoti,Joseph R., Methods and systems for manufacturing a family of aircraft wings and other composite structures.
Brustad, Val G.; Cundiff, Thomas R.; Hanks, Dennis J.; Woods, Jack A.; Modin, Andrew E., Methods and systems for manufacturing composite parts with female tools.
Lum, Matthew K.; Wagner, David L.; Hall, Thomas D.; Jones, Darrell D.; Appleton, Joseph A.; Olson, Vincent T.; Spishak, Noel A., One-piece barrel assembly cart.
Kennedy, Thomas D.; Havens, Marvin R.; Speer, Drew V.; Barmore, Charles R.; Espinel, R. Karina; Thomas, Jeffrey A., Oxygen detection system for a solid article.
Seemann ; III William H. (26 Montacilla Ocean Springs MS 39564), Plastic transfer molding techniques for the production of fiber reinforced plastic structures.
Schwab Scott D. (3441 Riverchase Pkwy. St. Charles MO 63301) Levy Ram L. (1622 Parquet Ct. St. Louis MO 63146), Pressure sensitive paint formulations and methods.
White Warren D. (Lake Jackson TX) Cook Phil H. (Cheshire CT) Wai Martin (Cheshire CT) Davis William (Lake Jackson TX), Process for resin transfer molding and preform used in the process.
McClure Edward Norman ; Jackson Steven Alan ; Sweesy Philip J., Process of forming fiber reinforced composite articles using an insitu cured resin infusion port.
Garesch Carl E. (New Kensington PA) Roebroeks Gerandus H. J. J. (Den Bommel NLX) Greidanus Buwe V. W. (Delft NLX) Oost Rob C. V. (Heerjansdam NLX) Gunnink Jan W. (Nieuwerkerk a/d Ijssel NLX), Spliced laminate for aircraft fuselage.
Dublinski Alex C. (Northford CT) Evans David A. (Chelmsford MA) Goldberg Joseph (Easton CT) Davis Geoffrey C. R. (Madison CT) Sharp ; Jr. William (Haddam CT) Kornitzky Michael A. (Branford CT), Tool for forming complex composite articles.
Jones, Darrell D.; Brennan, Joseph D.; King, Mark E.; Willden, Kurtis S.; Hempstead, George D., Tools for manufacturing composite parts and methods for using such tools.
Evans Patricia (12 Lantern La. Chelmsford MA 01824) Evans David (12 Lantern La. Chelmsford MA 01824), Vacuum bagging apparatus and method including a thermoplastic elastomer film vacuum bag.
Brennan, Joseph D.; Hempstead, George D.; Jones, Darrell D.; Lum, Matthew K.; McCowin, Peter D.; Rowe, Terrence J.; Schlosstein, Hugh R., Method and apparatus for layup placement.
Rotter, Daniel M.; Willden, Kurtis S.; Hollensteiner, William S.; Robins, Brian G., Method for forming and applying composite layups having complex geometries.
Locke, Christopher Brian; Robinson, Timothy Mark; Tout, Aidan Marcus; Long, Justin Alexander, Reduced-pressure systems and methods employing a leak-detection member.
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