| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of injection molding of a synthetic resin which prevents 'sink marks' even when a molded article has a partial thick-wall part, and the molded article thereof. SOLUTION: In the method of injection molding of the synthetic resin, the molded article 1 is so disposed that the rear side 2 thereof faces the parting line 5 of a fixed half 3 and a movable half 4, while a thick portion 1a demarcated by a design surface 6 formed inside the movable half 4 and by the rear side 2 is provided with a plurality of projecting parts 7 erecting near to the design surface 6 of the movable half 6 from the parting line 5 of the fixed half 3.
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