Patent ID: 11933498
Assignee: VENTURE AEROSPACE, LLC
Field: Other special machines (Mechanical engineering)
Classification: CPC B  F  Y | IPC B  F

Claim 13:
14. A method of manufacturing a composite structure comprising:
providing a mold to operate at a minimum internal pressure, the mold comprising at least one fluid conduit;
lining a mold interior surface with a release agent;
forming a first epoxy layer over the release agent;
forming a first non-stretching fiber layer over the first epoxy layer, the first non-stretching fiber layer formed in a defined pattern;
forming a second non-stretching fiber layer, the second non-stretching fiber layer disposed over the first non-stretching fiber layer and comprising a second epoxy layer;
disposing a first volume of a rigid and flexible polyurethane mixture into the mold, the rigid and flexible polyurethane mixture comprising a greater volume of rigid polyurethane than flexible polyurethane, the rigid polyurethane comprising a glass;
closing the mold to form a closed mold and to form a first working structure;
laying in at least one special structure in contact with the first working structure;
adding a second volume of the rigid and flexible polyurethane mixture into the closed mold through the at least one fluid conduit to form a second working structure from the first working structure;
stabilizing the second working structure; and
opening the closed mold; wherein:
the second working structure is a composite structure, the composite structure having a residual compressive stress on an exterior surface; and
the at least one special structure is at least one of a fluid line and an electrical wire.