FIBER REINFORCED COMPOSITE CORES AND PANELS

摘要

A fiber reinforced core panel is formed from strips of plastics foam heli cally wound with layers of rovings to form webs which may extend in a wave p attern or may intersect transverse webs. Hollow tubes may replace foam strip s. Axial rovings cooperate with overlying helically wound rovings to form a beam or a column. Wound roving patterns may vary along strips for structural efficiency. Wound strips may alternate with spaced strips, and spacers betw een the strips enhance web buckling strength. Continuously wound rovings bet ween spaced strips permit folding to form panels with reinforced edges. Cont inuously wound strips are helically wrapped to form annular structures, and composite panels may combine both thermoset and thermoplastic resins. Contin uously wound strips or strip sections may be continuously fed either longitu dinally or laterally into molding apparatus which may receive skin materials to form reinforced composite panels.