METHOD TO MAKE STRUCTURES OF COMPLEX SHAPE FROM COMPOSITE MATERIALS Russian patent published in 2011 - IPC B29C70/44 

FIELD: technological processes.

SUBSTANCE: invention relates to a method to make a part of composite material, fibres of which are coated with polymer that changes from paste-like or fluid condition into solid state in process of hardening phase by means of heating. The manufactured part contains a partially closed zone, which fully or partially at least at some stages of the method is occupied with a core. The core comprises a chamber made of elastic material with outer surface that limits the volume of the core, shape and dimensions of which comply with the volume of the partially closed zone and has the inner surface that determines the chamber volume. The specified volume of the chamber is filled with elements of solid granulated material and intragranular medium. The elements of the solid granulated material are selected so that the solid granulated material has such coefficient of expansion, at which the core volume changes in a controlled manner so that core dimensions vary in the specified manner as temperature increases to harden the polymer.

EFFECT: elimination of flaking when making a part of a composite material, and also elimination of part dimensions increase during operation.

17 cl, 7 dwg