Abstract
The molten metal was injected in a disk shaped die cavity through a gate in the tangential direction to the disk cavity under various conditions. The molten metal flows separately into the upper and lower sides of the cavity and meets at a point 225° from the gate independently of the injection condition. The velocity of molten metal lowers down to 2m/s at a final filling portion where a number of surface defects appear, as the molten metal fills the die cavity. The defects can be reduced by accelerating molten metal velocity near this portion. Water analogue was performed using the same shape of a plastic die. The mold filling behavior and effect of velocity decrease of molten metal can be simulated.
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