| 摘要 |
PROBLEM TO BE SOLVED: To mold a quality different diameter cylindrical green which does not generate a material loss, can improve molding efficiency by curtailing a necessary time from the preparation of the material to the completion of molding, and is free from the stabilization of the precision of the material to be used, the intrusion of air, and a scar. SOLUTION: Prescribed turn-down and setting of a small-diameter bead 5A are done by the approach of a cylindrical elastic finger 4 with an inclination part 4a and a small-diameter bead set ring 6A in relation to one end part 3a of a sheet-shaped cylinder member 3 which is wound/molded on the periphery of a molding drum 2, and prescribed tapered deformation and the setting of a bead 5 are done by the approach of a bead set ring 6B and the expansion change of a cylindrical finger 10 in relation to the other end part 3b. After that, small diameter side and large diameter side turn-up is done by the expansion of a pair of different diameter bladders 7A and 7B and the re-approach of the bead set rings 6A and 6B, and the different diameter cylindrical green G is molded by the combination of them. |
