METHOD FOR MOULDING OF RUBBER-CORD CASINGS Russian patent published in 2000 - IPC

FIELD: production of single-cavity and multi-cavity casings. SUBSTANCE: the casing blank is installed above the diaphragm, the lower bead is moulded, moulding steam is fed to the diaphragm cavity, the torus and the casing upper bead are moulded. At feeding of moulding steam to the diaphragm cavity bulging of its torus in the axial direction is simultaneously limited by an air cushion. The latter is displaced in the axial direction at a speed lower than the speed of movement of the diaphragm movable bead within 1:2 to 1:6. The casing torus is successively moulded from one bead of the item to its other bead. EFFECT: enhanced quality of moulding. 2 cl, 4 dwg