| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an undercut treatment mechanism capable of coping with requirement of save spacing by forming into a compact size, capable of being constituted simply without labor and time for assembly, capable of achieving cost down, especially capable of die cutting a formed product having an undercut part over its whole circumferential direction on an outer circumferential side surrounding an inner hole of the formed product easily.SOLUTION: A pair of undercut forming cores 30A, 30B surrounding a core 50 from a whole circumferential direction are stored in a holder 40 provided in a movable mold 13. The forming cores 30A, 30B are movable to a forming position coming into contact each other while surrounding the core 50 and to a separation position separating each other, and are guided into escape directions having a same or different angle with respect to the horizon, respectively.</p> |
