METHOD OF MANUFACTURING CURVILINEAR COMPOSITE CONSTRUCTION USING COMPOSITE PRELIMINARY IMPREGNATED TAPE Russian patent published in 2017 - IPC B29C70/54 

FIELD: technological processes.

SUBSTANCE: method of manufacturing a composite stiffener having a curved rib and at least one curved ledge is provided. According to the method, a piece of a composite pre-impregnated tape having unidirectional reinforcing fibers with a fiber orientation substantially zero degrees with respect to the longitudinal axis of the belt is provided. Glue the tape to the film. Forming the overlapping tape segments on the carrier by successively forming the offset segments of the tape on the carrier. The first shelf of the structure is formed by forming a film and a first part of the width of the tape along the first curved surface of the forming tool. A second shelf of the structure is formed by forming a film and a second part of the width of the tape on the second curved surface of the forming tool. Removing the film from the formed tape. The formed ribbon is cured.

EFFECT: improved physical and mechanical properties of the resulting articles.

14 cl, 32 dwg