| 摘要 |
PURPOSE:To provide a mold for injection molding which doesn't need a special cooling medium supply apparatus for cooling the mold, doesn't hurt the product with an ejector pin, can cool sufficiently a recessed mold and a core pin, and can mold a tubular product efficiently and precisely. CONSTITUTION:A fixed mold 3 is equipped with a core pin 4 which can be cooled sufficiently. The first plate 6 of a movable mold is equipped with a recessed mold 7 and a circulating passage of cooling medium 6a. The second plate 12 is equipped with a circulating passage of cooling medium 12a and a guide piece 13. The recessed mold 7 and the guide piece 13 are cooled with the cooling medium. A product ejector cylinder 15, which is fixed in the movable mold, is not affected by the circulating passage of cooling medium. The cylinder 15 having a larger contact area than that of the core pin is used for the ejection of the product so that the molded product is prevented from damage. |
