Primary structure multi-layer insulation

Details Primary structure multi-layer insulation Primary structure multi-layer insulation

1988-01-21

1990-04-10

McDowell, Robert

Stock material or miscellaneous articles

All metal or with adjacent metals

Workpiece with longitudinal passageway or stopweld material

52799, 148127, 220445, 228118, 228181, 244119, 244123, 428593, 428649, 428650, 428660, 428668, B32B 1518, B32B 1520, B32B 1501

Patent

active

049160273

ABSTRACT:
A primary multi-layer structural component having insulation properties and the method of producing same is disclosed. The structure is comprised of opposing spaced apart face sheets, a plurality of internal core sheets, the core sheets being spaced apart from each other and from the face sheets. Truss means extend internally across the structure, the truss means being connected to and supporting the opposing face sheets, and being integrally connected to and supporting the core sheets. Such structure is produced by forming a stack of metal sheets in contact with each other, including a pair of outer face sheets and a plurality of core sheets positioned between the face sheets, and providing a predetermined stop-off pattern by placing stop-off material in certain preselected areas between the contacting surfaces of adjacent faces sheets and core sheets, and of adjacent core sheets. The stack of sheets is then subjected to diffusion bonding to cause bonding of adjacent sheets in areas other than the preselected areas containing stop-off material, and subjecting the diffusion bonded stack to superplastic forming to cause stretching of the core sheets in the unbonded areas containing stop-off material.

REFERENCES:
patent: 2212481 (1940-08-01), Sendzimir
patent: 2333343 (1943-11-01), Sendzimir
patent: 2786004 (1957-03-01), Schwartz et al.
patent: 3200489 (1965-08-01), Keeleric
patent: 3376684 (1968-04-01), Cole et al.
patent: 4053969 (1977-10-01), Bayard
patent: 4292375 (1981-09-01), Ko
patent: 4703159 (1987-10-01), Blair

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