METHOD OF MANUFACTURE OF THE RIBBED SHEATHS OF THE POSITIVE CURVATURE Russian patent published in 2007 - IPC B29C61/10 

FIELD: building industry; motor car industry; helicopter and aircraft industry; shipbuilding industry; other industries; methods of manufacture of the ribbed sheaths of positive curvature.

SUBSTANCE: the invention is pertaining to the method of manufacture of the ribbed sheaths of positive curvature, which may use in the architecture, building industry, light engineering, motor car industry, helicopter and aircraft industry, sea and river ship-building industry. The method of manufacture of ribbed sheaths with positive curvature provides, that two sheets of the orientated and ordinary thermoplast are laid on each other and fixed. Downwards place the orientated sheet of the thermoplastic, and above it place the ordinary sheet of the thermoplast, which then are fixed to each other along their contour pointwise. Then the sheets are heated up to the temperature of the highly elastic state and carry out the subsequent chilling. After chilling the lower orientated sheet of the thermoplast use for repeated manufacture of the ribbed sheaths of the positive curvature. The invention possesses the high strength and the positive stability of the ribbed sheaths, the complete absence of any skeleton and reduction of the cost of manufacture.

EFFECT: the invention ensures production of the high strength ribbed sheaths with the positive stability, complete absence of any skeleton and the reduced cost of their manufacture.

2 cl, 4 dwg