| 摘要 |
PROBLEM TO BE SOLVED: To provide a hot runner in a metallic mold for injection molding a light alloy in which the formability and the service life of the metallic mold are improved and also, the deformation of a molded product when the metallic mold is opened, can be prevented. SOLUTION: A fixed type pin 5 which is faced to the tip part 4 of a nozzle for hot runner and has high heat resistance at the position in direct contact with molten metal and larger diameter than the inner diameter (d) of the nozzle, is arranged and an ejector pin 6 is arranged at the position in no direct contact with the molten metal injected from the tip part 4 of the nozzle. In this way, the erosion of the ejector pin 6 and the invasion of the molten metal into the ejector pin 7 can be prevented.
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