MOLD FOR INJECTION MOLDING

PROBLEM TO BE SOLVED: To manufacture a molded product of high quality without a resin interface and a welding trace by molding the molded product having a through hole extending in an approximately U-shape in one time injection molding process, and to improve productivity by reducing the number of processes.SOLUTION: The mold for injection molding 1 molds the molded product having the through hole extending in the approximately U-shape, and includes a cavity mold 2 in which a cavity 20 for forming an outer surface of the molded product is formed, and a core mold 3 of the approximately U-shape which forms the through hole. The core mold 3 is divided into a pair of slide cores 30, 30 inserted respectively in the cavity 20 from an external of the cavity mold 2 at a center of a folded part 3a. Each of the pair of slide cores 30, 30 is divided into an outer mold 31 positioned in an outer side part of the U-shape core mold 3, and an inner mold 32 positioned in an inner side part of the U-shape core mold 3. The outer mold 31 and the inner mold 32 can relatively slide along a slide direction of the slide cores 30.