In cold chamber die casting of light metals, costly unscheduled machine downtime often stems from problems related to the constantly changing and unequal thermal expansion of the shot sleeve and the plunger tip. With large shot sleeves especially, inadequate temperature control can result in either blow-by or flash at the beginning of the stroke, or interference near the end. Effective temperature control is therefore essential to the profitable production of larger castings. The temperature transfer and distribution in both shot sleeves and plunger tips was investigated by simulation, using a finite volume numerical program to develop a three-dimensional computer model that, through changing colors, clearly and accurately predicts the flow of temperature. The effect of both oil and water, with coolant distribution in various configurations was studied. The results of this investigation may provide further insight into the most efficient and cost-effective methods of temperature control.
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