| 摘要 |
PROBLEM TO BE SOLVED: To prevent a molten resin from being excessively supplied in one side direction of a cavity and thereby, inhibit the concentration of a stress or the warpage of a finished product, even when a gate is arranged at a position where it is deviated from the center of the cavity to the one side. SOLUTION: The injection molding tool 1 has a recessed resin reservoir 7 formed in an opposite face to a gate 6 and a molten resin is injected into a cavity 4 from a molten injection hole 5 in the center of the gate 6 to form a resin molded product. The resin reservoir 7 is formed at an offset position to the molten resin injection hole 5. A gap between the tip face of the gate 6 encircling the hole 5 and the inner face 3a of the cavity 4 opposed to the tip face of the gate 6, differs in circumferential size. Besides, the difference in the circumferential size of the gap works to adjust the flow rate and direction of the molten resin.
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