The injection molding system is well suited for processing alloys at tightly controlled temperatures. First, the slurry making and component forming operations are combined into one step and the slurry is accumulated in the direct vicinity of the mold gate. Second, the melt transfer from the barrel to the mold is enhanced by application of hot sprue and hot runners that convey the melt to the mold during injection and maintain it at processing temperatures between injection cycles. As a result, the flow distance between the slurry with a controlled temperature and the mold gates is reduced, thus minimizing a drop in temperature. Preventing heat losses has a particular meaning for magnesium alloys, known for their low thermal capacity and tendency to quick solidification, which disrupts the complete filling of the mold.
KeywordsMagnesium Alloy Injection Molding Solid Fraction Squeeze Cast Shrinkage Porosity
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