| 摘要 |
PROBLEM TO BE SOLVED: To prevent the clogging with resin from developing even after the repetition of the short of a mold by a method wherein a plurality of holes at an outlet, through which gas is discharged, are arranged in such a predetermined embodiment that at least three straight lines connecting three holes among the holes corresponds to the three sides of a right-angled triangle. SOLUTION: A pin part 62 extends itself in either one of a runner or a cavity. An outlet 58 has a plurality of holes 80, which are positioned in such a predetermined embodiment or pattern that at least three straight lines connecting three holes among the holes resembles or corresponds to the three sides of a right-angled stiangle. Even when a melted resin skin develops on the outlet 58 at the end of a molding cycle, each hole 80 is too small in diameter to form a clogged state. In this case, the skin covering a plurality of holes 8 is easily blown away at the next gas discharging for obtaining a molded article in succession. |
