METHOD TO MANUFACTURE THREE-LAYER PANELS OF POLYMER COMPOSITE MATERIAL WITH MIDDLE LAYER FROM FOAM PLASTIC REINFORCED WITH STIFFENING RIBS Russian patent published in 2011 - IPC B63B5/24 B32B37/10 

FIELD: construction.

SUBSTANCE: method includes manufacturing of stiffening ribs combined into a single corrugated element of polymer composite material, filled with foam plastic at two sides to the level of the corrugated element shelves, and forming of bearing layers on the surface of the middle layer at both sides. The corrugate element is produced in a single process, simultaneously with manufacturing of the middle layer, carried out by method of laying "dry" glass-reinforcing material, preferably, glass tissue and bars of rigid polyvinylchloride foam plastic of the specified shape of cross section into the rigid matrix with the inner cross section, which is similar to the cross section of the middle layer panel, made to match the size of the three-layer panel. The matrix is covered with a rigid puncheon, mechanically connected to it, to which a vacuum pump is connected, as well as a device of binder supply from the reservoir. Vacuum is pulled in the working cavity of the rigid matrix, binder is supplied in it to impregnate the middle layer panel. The middle layer panel is cured in the rigid matrix under vacuum for preliminary polymerisation of the binder, then the vacuum pump is switched off, and the puncheon is removed off the rigid matrix. The middle layer panel is removed from the rigid matrix after it achieves the ambient temperature.

EFFECT: increased strength and rigidity of triple-layer panels, reduced labour intensiveness of manufacturing.

2 cl, 4 dwg