Patent ID: 8740596
Filing Date: 2014-06-03
Classification: B29C,B29D

Abstract:
1. A tire vulcanization mold for vulcanizing a green tire comprising: a side mold having a side wall molding surface; and a tread mold having a tread molding surface, the tread mold including an elongated exhaust groove open to the tread molding surface, a blade that is configured to enter the exhaust groove to create a gap between the blade and a portion of the tread mold defining the exhaust groove, and an exhaust hole connecting the exhaust groove and an exterior of the tire vulcanization mold; a length of the exhaust groove being reduced partway in a mold depth direction of the tread mold, such that the exhaust groove includes an upper groove portion having an upper length and a lower groove portion having a lower length, the upper groove portion being positioned in a mold surface side of the tread mold that includes the tread molding surface and the lower groove portion being positioned in a mold back surface side of the tread mold, the lower length being shorter than the upper length; a width of the upper groove portion being greater than a thickness of the blade, and a width of the lower groove portion being less than or equal to the thickness of the blade; the blade being abutted against at least a bottom surface of the tread mold defining the upper groove portion and edge surfaces of the tread mold defining both sides of the lower groove portion in a widthwise direction of the lower groove portion while the blade is embedded in the exhaust groove; and the blade includes a communicating portion that communicatively connects the upper groove portion and the lower groove portion.