Composite structure and process and apparatus for making the sam

Details Composite structure and process and apparatus for making the sam Composite structure and process and apparatus for making the sam

1976-06-24

1979-04-03

Dixon, Jr., William R.

Stock material or miscellaneous articles

Hollow or container type article

Cellular material derived from plant or animal source

139 16, 139387R, 427390R, 428167, 428213, 428114, B32B 512, B32B 328, B05D 302, D03D 302

Patent

active

041478223

ABSTRACT:
A composite structure containing a weave and a rigidifying resin matrix is formed in a hollow configuration with inwardly directed ring stiffeners. This is achieved by arranging longitudinal strands in radial rows or groups around a base mandrel and weaving a circumferential strand through the longitudinal strands. When a wall section of normal width is desired, a submandrel is placed around the base mandrel and those longitudinal strands located innermost in their respective groups are passed behind the submandrel so that the circumferential strand is woven only through the longitudinal strands located outwardly from the submandrel. Where a ring stiffener is desired, the thickness of the weave is increased by weaving the circumferential strand through all of the longitudinal strands located beyond the base mandrel, and this of course takes place beyond the end of the submandrel. Longitudinal stiffeners may be provided along with the ring stiffeners by forming depressions in the submandrels. This enables all of the longitudinal strands at the depression to remain outwardly from the exterior surface of the submandrel so the circumferential strand may be woven through them at that location.

REFERENCES:
patent: 3719212 (1973-03-01), Emerson et al.
patent: 3750714 (1973-08-01), Holman et al.
patent: 3875973 (1975-04-01), Kallmeyer et al.

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