TIRE-BUILDING DRUM FOLDABLE IN RADIAL DIRECTION UNDER ACTION OF POWER CYLINDERS Russian patent published in 2005 - IPC

FIELD: tire industry.

SUBSTANCE: invention is designed for building diagonal tire blank and building blanks of radial-ply tire carcass. Proposed building-building drum foldable in radial direction under action of power cylinders contains said power cylinders installed on central hub to shift big and small segments in radial direction without misalignment and shift small sectors when folding the drum for moving their faces between two adjacent big segments and wedging big segments to form rigid cylindrical shell of accurate geometric sizes. Each big segment is set into motion by one power cylinder. Stop is provided to limit radial displacement of big segments to definite diameter made in form of guides with beads connected with big segments and arranged symmetrically relative to power cylinder. Guide bushings for interaction with beads of guides are made in cover of power cylinder.

EFFECT: enlarged operating capabilities of drum owing to simplification of drum folding/unfolding control circuit, improved reliability.

6 dwg