| 摘要 |
PROBLEM TO BE SOLVED: To mold a high-quality composite molded product which is free from an inverted blister or a burr by designing a well-balanced layout of gates and runners in a mold for composite injection molding. SOLUTION: Runners 3b and 4b leading to gates 7b and 8b for cavities 2a and 2b for manufacturing a molded product and a formed product, are partially crossed, then a deep groove 5 is formed at the crossing part and is controlled by a protrusion 6. Consequently, a secondary runner 4b is closed during manufacturing the molded product and the secondary runners 4a and 4b sides are opened during manufacturing the formed product. Thus the well-balanced layout of a primary and a secondary gate 7a and 7b, and primary runners 3a and 3b and secondary gates 8a and 8b, and the secondary runners 4a and 4b can be achieved. The well-balanced filling of the resin into a primary and a secondary cavity 2a and 2b can be realized by the well-balanced layout, and the high- quality composite molded product free from the inverted blister and the burr can be obtained.
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