| 摘要 |
PURPOSE:To cause the position of female screws or the dimension between mutual female screws in a product to be accurate capably of fixing an insert to a mold firmly and easily, only driving the insert by driving the molding insert with its shoulder part into the fixing pin with the tapered shoulder part. CONSTITUTION:The shoulder part 2'' of a molding insert is driven into the core pin 3' of a mold 3, and is plastically deformed, and then is fixed to the mold core pin 3'. The thickness of the shoulder is caused to be 0.5-4mm and is preferably 0.7-0.8mm. If the shoulder is too thick, the shoulder is not driven into, and if too thin, the shoulder part 2'' of the molding insert is destroyed. The depth (h) of the shoulder is set to be 1-4mm and preferably is 1.5-2.5mm. If its depth is two shallow, it is easily detached. The fixing pin is preferably a quenched metal to be used repeatedly. The taper angle alpha of the shoulder part is set to be 1-5 deg. and is preferably 2-3 deg.. If the angle is too large, the shoulder part 2'' of the molding insert is destroyed, and if too small, its fixing is not completed. |
