| 摘要 |
PURPOSE:To make it possible to make a gate part or bent part with arbitrary cross-sectional area by a method wherein the gate part is throttled or cut off before resin material solidifies with a gate cutting pin, which is driven by an ejector plate. CONSTITUTION:Molten resin material is poured from a cylider barrel 29 through a sprue 5, a runner 6 and a gate 7 in the cavity 2 of a mold 1. After the pouring of the resin material, the gate port 15 of the cavity 2 is throttled or cut off by advancing an ejector plate 13 and a gate cutting pin 16 through an ejector pin 22, which is driven with an ejector plate 21 advanced through the forward driving of the rod 24 of a cylinder 21. When the force applied to the ejector plate 13 is released the ejector plate 13 and the gate cutting pin 16 are pushed back in the retreating direction by energizing force of a spring 14. Together with said retreating movement, the ejector pin 22 is also moved in retreat, resulting in starting mold opening. |
