METHOD OF MANUFACTURING PANEL WITH STIFFENING RIBS OF POLYMER COMPOSITE MATERIALS Russian patent published in 2017 - IPC B29C70/36 

FIELD: technological processes.

SUBSTANCE: forming a partially cured panel of polymeric composite materials (PCM) and forming at least two preforms in the form of an L-shaped profile by laying a layer of sacrificial tissue on the surface of the mould, and then several layers of carbonaceous material. The blanks are placed in pairs on the surface of the panel to form at least one preform of the stiffener in the form of a T-shaped profile. A layer of sacrificial fabric is laid on top of the panel with a stiffening preform placed on top of it, on which a distribution grid connected to the binder feed line is placed on top of the stiffener preform. In the depressions of the stiffener preform formed by the internal corners of the T-shaped profile, crimp elements are placed on top of the distribution grid. The resulting structure is covered with two layers of a vacuum film, with each layer forming an appropriate vacuum bag, connected by means of its vacuum line to its corresponding pump, and a vacuum is created in each of the vacuum bags formed. Afterwards, the thermosetting binder is fed and impregnated with the preform of the stiffener and then it is cured. The panel is formed on the basis of a fabric of carbon fiber impregnated with a thermosetting binder by the method of vacuum infusion and pre-determined according to a given regime.

EFFECT: simplification of the technology of manufacturing panels with stiffeners made of polymer composite materials and improving the quality of the resulting parts.

4 cl, 3 dwg