Manufacture of resilient ceramic fiber seals

Details Manufacture of resilient ceramic fiber seals Manufacture of resilient ceramic fiber seals

B - Operations, Transporting

23

P

26/161

B23P 15/00 (2006.01) F16L 41/00 (2006.01) F28F 9/10 (2006.01) F28F 21/04 (2006.01)

Patent

CA 1060189

ABSTRACT OF THE DISCLOSURE: A method of manufacturing an annular seal for a heat recuperator tube end is disclosed as comprising loosely wrapping without appreciable tension at least one layer of a compres- sible and resilient blanket of unbonded ceramic fibers about an annular forming mandrel, stabilizing the inner area of the fiber layer, thereafter compressing the fibers to decrease their volume while not destroying the recuperative ability of the fibers to resiliently expand back to a volume substantially greater than their compressed volume when the compression is released by wrapping a retainer exteriorly of the fibers to com- press them and to temporarily retain them in compressed condition, the retainer being destructable at operating temperatures of the tube ends of the recuperator in which the seal is to be used. A specific wrapping process utilizing overlapping sheets of heat destructable wrapping material is disclosed.

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