PRESTRESSED FERROCONCRETE PRODUCT MOLDING APPARATUS Russian patent published in 1995 - IPC

FIELD: manufacture of prestressed FERROCONCRETE products. SUBSTANCE: thrust for fittings to be stressed are disposed within product in the vicinity of fitting rod outlets and positioned in guiding sleeves, which are rigidly secured on associated equipment. Apparatus has devices for extracting and retracting of thrusts. Device have supporting frames with guides, where drive carriages are positioned. Each carriage is connected through tie-rods with parallelogram-type pivot link systems positioned in opposed relation with respect to this carriage. Tie-rods are connected with floating lever, which is pivotally secured on associated equipment. Each pivot link system is formed as a pair of double-links, which are fixed with their one side on cross-piece rigidly mounted on guiding poles, and with their other side on cross-piece movable along guiding poles and rigidly connected with movable beam connected with each thrust. EFFECT: increased efficiency and enhanced reliability in operation. 6 dwg