| 摘要 |
PURPOSE: An injection forming mold is provided to change a surface pattern on a product by replacing a pattern plate instead of placing an upper core. CONSTITUTION: An upper core(25) of an injection forming mold comprises an upper core base(26), a pattern plate(30), a frame(40), and a pair of combining blocks A pattern plate placing groove(28) is formed on the bottom of the upper core base. The pattern plate is settled in the pattern plate placing groove, and uneven patterns are formed on the surface of the pattern plate facing the lower core. The frame comprises a window and a support sill(46). The window is formed at the center so that a pattern is exposed. The upper core base and the pattern plate are inserted into the window. The support sill protrudes inward from the window so that the perimeter of the bottom side of the pattern plate is settled. The combining blocks settled over the upper part of the upper core base and frame.
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