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US 10,252,452 B2Granted
Method of sealing a fastener
AssigneeThe Boeing Company
InventorWeidong Song
Life of this patent
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Abstract
A method for sealing a fastener employs a mold which provided with an inlet port for molding material. The mold is then positioned over a fastener and the mold is sealed against a structure. A moisture cured polyurethane reactive adhesive (MCRPA) as a molding material is then heated and injected into the mold. Upon solidification of the MCRPA, the mold is then removed to expose the MCRPA to atmospheric moisture and cured to leave an in-situ molded cap formed over the fastener and sealed to the structure.
Claims13
A method for sealing a fastener comprising the steps of:
- providing a mold having an inlet port for molding material;
- positioning the mold over a fastener;
- sealing the mold against a structure;
- heating a moisture cured polyurethane reactive adhesive (MCRPA) to above melting temperature;
- injecting the MCRPA as the molding material into the mold to fill the mold with any overflow routed through an overflow port;
- solidifying the MCRPA in a molded cap shape;
- and,
- removing the mold exposing the MCRPA to atmospheric moisture;
- moisture curing the MCRPA to leave an in-situ formed molded cap over the fastener and adhered to the structure.
6 more elements
Dependencies are inferred from the claim text.