| 摘要 |
PURPOSE:To improve precision in a molded piece with improvement of cleanness of molding environment and prolong lifetime of a cut pin by preventing generation of metal powders due to sliding friction of the cut pin. CONSTITUTION:In a cylinder member 30 embedded in a moving side mold 6, a cut pin 34 having a sprue ejector pin 32 is provided movably back and forth. The cut pin 34 is locked at its back end side by a ball bearing 33 and centered. With a clearance provided between the tip side and the inner face of the cylinder member 30, to which melted resin does not flow, a non-contact state is kept. |
