| 摘要 |
PURPOSE: An injection mold and an injection material are provided to maintain a hairline groove of a product uniformly. CONSTITUTION: An injection mold and an injection material comprise upper and lower dies(10,20). The upper and lower dies has fixing plates(11,25), round plates(12,21), upper and lower embedded holes(13,22). A first upper core(14) of the avoirdupois is inserted into the upper embedded hole. The lower embedded hole has an ejecting unit(26) with a return pin(264). The return pin is fixed on a lower core through a lower plate.
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