Let's defined normalized machine size effect

make for the three function of the machine characteristic as question. Every die casting machine has a characteristic curve on the diagram as well. Assuming that the die casting machine has the ``common'' characteristic, , the normalized power can be expressed

where is the machine power normalized by . The maximum power of this kind of machine is at 2/3 of the normalized flow rate, , as shown in Figure . It is recommended to design the process so the flow rate occurs at the vicinity of the maximum of the power. For a range of 1/3 of that is from to , the average power is 0.1388 , as shown in Figure by the shadowed rectangular. One may notice that this value is above the capability of the die casting machine in two ranges of the flow rate. The reason that this number is used is because with some improvements of the the runner design the job can be performed on this machine, and there is no need to move the job to a larger machine

copyright Dec , 2006

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