MOLDING METHOD OF BOOT FOR CONSTANT VELOCITY JOINT

摘要

PROBLEM TO BE SOLVED: To provide a molding method of a boot for constant velocity joint capable of preventing a burr from occurring in a molded body after injection molding.SOLUTION: A molding method of a boot 9 for constant velocity joint includes: a process of performing injection molding of a molded body W by using an outer mold 11 and an inner mold 12; a process of lifting a plurality of segmented molds 15a to 15h of the inner mold 12 and separating the segmented molds from a set ring 16; a process of lifting a core shaft 14 of the inner mold 12 and separating the core shaft from the segmented molds 15a to 15h; a process of separating respective segmented molds 15a to 15h from the molded body W; a process of introducing lower end parts of the separated segmented molds 15a to 15h along an engagement surface 16b to a set ring 16; and a process of inserting a lower end part of the core shaft 14 to the set ring 16 from the above side thereof, pressing upper end parts of the segmented molds 15a to 15h downward by a projection 14b at an upper end part of the core shaft 14 and adhering the respective segmented molds 15a to 15h to each other while engaging the lower end parts thereof with the engagement surface 16b, in the order.