| 摘要 |
PURPOSE:To improve the injection efficiency to the second cavity and to alleviate the occurrence of noncharging of resin and voids by increasing the first cavity side sectional area of the second gate for charging resin from the first cavity to the second cavity wider than the second cavity side. CONSTITUTION:The sectional area S1 of the second gate 4 at the first cavity side is increased as compared with that S2 of the second cavity side (S1>S2). Thus, since the area S1 of the first cavity side is larger in the second gate 2, resin is charged to the second cavity 5 before the resin is considerably charged in the first cavity 3, the resin is smoothly charged to suppress the uncharging and voids. Further, cutting after injection molding is executed previously at the second cavity side 5, and the first cavity 3 side can be then readily cut. |
