INJECTION MOLDING DEVICE AND INJECTION MOLDING METHOD

摘要

PROBLEM TO BE SOLVED: To accurately control timing for starting pressurization action by a squeeze pin after a molten material is filled into a cavity by an injection mechanism irrespective of variation of injection speed, to achieve improvement of quality of a molded article.SOLUTION: A first cylinder 16 of a first hydraulic driving part 11 has a first discharge port 21 for discharging drive oil by a first piston 15 moving in the first cylinder 16 when a molten metal material is filled into the cavity 8 and a second discharge port 22 for discharging the drive oil by the first piston 15 moving in the first cylinder 16 when the molten metal material in the cavity 8 is pressurized by a screw 10 after the molten metal material is filled into the cavity 8. A second hydraulic driving part 13 starts the pressurization action by the squeeze pin 12 since the drive oil discharged from the second discharge port 22 is supplied to a second cylinder 19.