| 摘要 |
PROBLEM TO BE SOLVED: To improve a productivity by realizing simultaneous restraint of damage, making constitution easy as a tool and gurantee of a secure resin molded article in an injection molding tool. SOLUTION: An injection molding tool for molding an inner undercut part comprises a stationary mold, a movable mold, and an ejector provided at the movable mold. The movable mold comprises a cavity block completed body 53 equipped with two cavity cores 532 wherein a region of a parting surface forms individually an opposite surface of the inner undercut part. Transfer and pivoting means 533, 531j of an cavity core for enabling each cavity core 532 to transfer in an openly separating/approaching direction to the stationary mold and to pivot in an openly separating/approaching direction to an opposite surface of a cavity surface, and a means 534 wherein each cavity core 532 is returned to an original position by abutting against a parting surface of the stationary mold, are provided at the cavity block completed body 53. |
