INJECTION MOLDING MACHINE, MOLD FOR INJECTION MOLDING, AND METHOD FOR INJECTION MOLDING OF OVER-MOLDED BODY

摘要

PROBLEM TO BE SOLVED: To provide a mold for injection molding to manufacture a multilayer molded body. SOLUTION: The injection molding machine comprises a cavity plate 208 having first and second cavities 212, 220 so that a depth of the latter is shallower than that of the former, a core plate 204 movable to the plate and having cores 56a, 56b, a cavity enlarged part having a pair of cavity element 64 around the core in such a manner that a depth of the enlarged part is substantially equal to a difference between the depth of the first cavity and the depth of the second cavity, a shape different from a shaft of the first cavity is formed, and cavity enlarging actuators 72a, 72b for moving a pair of cavity elements between an open position for inserting the core into the first cavity and a closed position for forming a composite cavity for containing the core in combination with the second cavity with the pair of cavity elements.