COMPOSITE REINFORCEMENT PRODUCTION METHOD Russian patent published in 2017 - IPC B29C55/30 E04C5/07 

FIELD: construction.

SUBSTANCE: according to the production method the reinforcement mandrel is made from the roving filaments, for that purpose the roving filaments are dried by the heated air, impregnated with binder, the reinforcement mandrel is formed from the roving filaments. The reinforcement hooks are formed at the mandrel by the winding of harness on the mandrel. The resulted reinforcement workpiece is heated in the furnace until the binder polymerization. After the reinforcement release from the furnace it is cooled. Each filament is impregnated with the binder in the separated filament position. Each filament is pulled up after impregnation and the binder is wrung out from it. The impregnated filaments are connected longitudinally into the bunch. The bunch of filaments is pulled and wrung out from the binder surpluses. While pulling the filament bunch, convert the impregnated filaments into the position parallel relative to the other filaments. The dry harnesses are made from the dry roving filament simultaneously with reinforcement mandrel manufacture, for that purpose each dry harness is twisted around its longitudinal axis and simultaneously stretch it in the longitudinal direction, at the same time increase the twisting moment and tensile force and give the hardness to the harness, greater in comparison with the mandrel hardness. Each dry harness is wound up on the mandrel. The round shape of the mandrel and reinforcement protruding hooks above it, is formed by the dry harnesses. At the same time at winding of each harness on the mandrel the harness is pressed until the formation of the groove in it, the smaller part of the harness is positioned there by pressing depth adjusting of the harness into the mandrel. The resulted reinforcement workpiece is kept from the contact with the mandrel until the harnesses impregnation with the binder, and simultaneously with the indicated workpiece curing, it is moved to the furnace in which its heating and polymerization is carried out. The gradual cooling of the manufactured reinforcement is carried out.

EFFECT: increase of the reinforcement strength and its bearing capacity.

9 cl, 17 dwg