| 摘要 |
PURPOSE: To make it possible to perform an injection molding continuously and enhance productivity by eliminating the possibilities of blocking a discharge port by thin burrs and thereby dispensing with the removal of burrs from an inlet terminal for evacuation each time an injection molding process is terminated. CONSTITUTION: In a vacuuming injection-molding die which performs an injection molding by evacuating an air from one end opening part, and injecting an injection molding material into a cavity 4, a cylindrical port 10 is opened protruding from the periphery of one end opening part of a through path 7 on the parting face 2 of one force 1 of a molding die, and a larger dia.long shaft columnar hole 13 than the cylindrical port 10 is drilled against said port 10, on a parting face 12 of the opposite force 11 of the die. In addition, the tip opening part of the cylindrical port 10 is used as an inlet terminal at the time of evacuation by introducing the cylindrical port 10 into the columnar hole 13. |
