| 摘要 |
PURPOSE:To mold a thin molded article stably and with high accuracy, by performing reclamping when a specified time has passed after the degree of opening of molds in high speed injection has reached the value set in advance. CONSTITUTION:An injection process is started by the time out of a timer for delaying injection and the parting surface 71 of both molds 51 and 53 becomes open by the injection of a molten resin accompanied with the advance of a screw 57. When the degree of opening of he molds coincides with the set value of a setter 67 for the degree of opening of the molds, the advance of the screw 57 stops and the injection process ends. The moment for reclamping is the same moment as the end of the injection or when a timer for setting a reclamping time is used, the set time of the timer is 1 or 2sec and the reclamping is started by the time out of the timer. The reclamping after reducing pressure can be set selectively as described above i.e. at the moment when a high pressure injection just ends or after a definite time set by the timer, and the optimum molding condition can be thereby easily set. |
