Patent ID: 6923629
Filing Date: 2005-08-02
Classification: B29C,B29D,Y10S

Abstract:
1. In a venting apparatus for a tire vulcanizing mold which includes a casing inserted in a vent hole of a mold, a valve body which is formed of a valve head inserted in a center through hole of the casing and a valve insert, a spring which surrounds the valve insert for thereby providing a certain elastic force to the valve body, and a stopper which is engaged to a lower end portion of the valve insert and actually controls the entire moving distance of corresponding said valve body in a vertical direction, the venting apparatus for said tire vulcanizing mold being characterized by: an inner diameter of said center through hole in the casing is gradually increased in an upper direction and is gradually decreased in a lower direction for thereby forming a tapered shape, and a slant angle of a slant surface of the valve head point-contacting with an upper corner portion of the center through hole is different from a slant angle of the upper corner portion of the center through hole.