| 摘要 |
PURPOSE:To make it possible to mold surely a tread with a uniform thickness by means of injection molding method. CONSTITUTION:After an insulation 20 is provided on the outer peripheral face of a molding drum 10 and a braker 21 is provided furthermore on the outer periphery thereof, a pair of molding rings 8 and 9 being separable in the axial direction are placed on the outer periphery of this molding drum 10 to form a cavity 11 and a rubber extruded from an extruder 2 is injected into the cavity 11 from a plurality of positions being close to the tread center through a rubber path 14 of the molding ring 8 to mold a tread T consisting of the braker 21 and a tread rubber layer. |
