Assembly of sealed components
View Patent ↗A method of assembling components together in sealed relationship and an assembly of two components for forming a fluid-tight seal together are provided. The method includes applying to at least one mating surface a layer of polysulphide sealant and allowing it to cure before bringing together the mating surfaces under a moderate pre-determined pressure for a pre-determined length of time whereby to bring about a sealed joint between the two mating surfaces.
1. A method of assembling components together in sealed relationship, the components have respective mating surfaces, the method including the steps of:
applying to at least one mating surface a layer of polysulphide sealant and allowing the sealant to cure;
after allowing said sealant to cure, bringing together the mating surfaces; and
applying a pre-determined pressure therebetween for a pre-determined period whereby to bring about a sealed joint between the two mating surfaces.
2. A method as in claim 1 in which said layer of polysulphide sealant is applied to both mating surfaces.
3. A method as in claim 1 in which the period of application of pressure is at least 1 hour.
4. A method as in claim 3 in which the said period is between 5 and 1×10 7 hours.
5. A method as in claim 3 in which the said period is between 8 and 1440 hours.
6. A method as in claim 1 in which the pre-determined pressure is between 5 and 400 MPa.
7. A method as in claim 1 in which the pre-determined pressure is between 5 and 200 MPa.
8. A method as in claim 1 in which the pre-determined pressure is between 8 and 50 MPa.
9. A method as in claim 1 in which the pre-determined pressure is applied by bolting together the two components in their final assembled configuration.
10. A method as in claim 1 in which the components are subject to a raised temperature during at least part of the step of applying pressure.
11. A method as in claim 1 in which the at least one layer of polysulphide sealant is applied to a painted said mating surface.
12. A method as in claim 11 in which the layer of polysulphide sealant is applied to the painted mating surface a sufficiently short time after the paint is applied to at least substantially reduce the need for any further treatment of the painted surface prior to the application of the layer of polysulphide sealant.
13. A method as in claim 12 in which the layer of polysulphide sealant is applied to the painted surface immediately after the paint has dried.
14. A method as in any preceding claim in which the components with sealant applied are stored, including the step of applying a protective covering to the cured layer of polysulphide sealant prior to storage of the component.
15. A method as in claim 1 , in which the mating surface to which the layer of polysulphide sealant is not applied is a painted surface.
16. A method as in claim 1 in which the layer of polysulphide sealant applied is a transition metal oxide curing compound.
17. A method as in claim 1 in which the layer of polysulphide sealant applied is a manganese dioxide curing compound.
18. A method as in claim 1 in which the layer of polysulphide sealant applied is a dichromate curing compound.
19. A method as in claim 1 in which the layer of polysulphide sealant applied is an organic-cure compound.
20. A method of assembling components together as in claim 1 in which the components comprise aircraft structural components.
21. A method as in claim 20 in which the aircraft structural components are used to house fuel on board the aircraft.