Effect of Casting and Mould Cooling Temperatures on the Warping Phenomenon of Aluminium at High Pressure Die- Casting
Abstract. The effect of molten aluminium pouring temperature and hot oil
temperature for mould heating and cooling on the warping phenomenon of
thick-thin section aluminium high-pressure die-casting process was investigated
on a four cavities hard disk drive mould. Nine combinations of molten
aluminium A380 pouring temperature of 660ºC, 690ºC and 720ºC and hot oil
temperature of 150ºC, 200ºC and 250ºC were being studied. Magmasoft
simulation software was used to simulate the molten aluminium flow in the
mould and distortion to understand the die-casting cooling pattern in response
to different molten aluminium temperature and mould cooling parameters
settings. Actual casting was carried out to produce the parts according to
simulation settings. Warping data was collected and analysed using Minitab 17.
It was found that each mould cavity had different cooling pattern resulting in
different warping magnitude. Pouring temperature at 660ºC and 720ºC both had
higher warping distortion then 690ºC. Hot oil temperature at 150ºC had higher
warping distortion than 200ºC and 250ºC. The lowest warping distortion was
establish at molten aluminium pouring and hot oil temperature of 690ºC and
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