MOLD FOR INJECTION MOLDING AND METHOD FOR HOLDING MEMBER IN MOLD FOR INJECTION HOLDING

摘要

PROBLEM TO BE SOLVED: To improve holding power and positional accuracy between an insert member and a core pin. SOLUTION: The neighborhood of the inserting position of the core pin 16 into which the insert member 14 is inserted is made to be a thin structure and flexibility is provided to the core pin 16 and pressure is applied on a liquid such as water and oil and a fluid such as gas filled in the inside of a hollow of the core pin 16 to extend the diameter of the core pin 16 and to bring the insert member 14 into close contact with the core pin 16.