| 摘要 |
PURPOSE:To enable to cut off automatically a molding material of a secondary runner part at the time of extrusion of a molded article, by forming a part in the vicinity of the root connecting with a cavity of the secondary runner at a specific inclination angle with the direction of the extrusion of the molded article. CONSTITUTION:At least a part 6'a in the vicinity of the root connecting with a cavity of a secondary runner 6' is formed in an inclination angle so that bending stress to be generated at the part 17 near the root of a molding material 16 of a secondary runner part at the time of extrusion of a molded article becomes breaking bending stress, in an injection mold 1 provided on the secondary runner 6' connecting a submarine gate 5 with the cavity 7. |
