Patent ID: 6802922
Filing Date: 2004-10-12
Classification: B29D

Abstract:
A method for manufacturing a pneumatic tire, comprising:manufacturing a green tire in which extruded rubber having the shape of a ribbon or a sheet is piled up on a ply and a belt member assembled on a drum to form a tread; forming a carved groove on a tread surface of said green tire in direction of a lug groove; charging said green tire formed with said carved groove in a vulcanization-molding machine to carry out vulcanization-molding so as to form a vulcanized tire having the lug groove, which is formed by a lug groove rib of the vulcanization-molding machine the vulcanization-molding machine having an upper mold part and a lower mold part; and inserting one of the lug groove ribs into a corresponding carved groove formed on said tread surface of the green tire while rotating one of the upper mold part and the lower mold part relative to the green tire through an angle corresponding to an angle between a longitudinal axis of the carved groove and an axis of the tire.