| Summary: | 碩士 === 建國科技大學 === 機械工程系暨製造科技研究所 === 97 === In this study, an innovative method based on high pressure thermal spraying technologies is used to melt Sn-Bi Alloy and atomized into semi-melting minute particles. The atomized powders are used to manufacture metal Rapid Tooling (RT). We experimentally investigated measured the natural heat transfer performance of metal mold that make up of different metal powders such as atomized Sn-Bi Alloy powders, Aluminum alloy and metal resin. The experimental results show that the heat transfer performances of metal mold make up of Aluminum alloy, atomized Sn-Bi alloy powders, Sn-Bi alloy casting and metal resin in sequences. We also proposed a new permeate method to manufacture the backup material of spray mold. Firstly, the atomized Sn-Bi alloy powders are uniformly filled into the back of the spray mold. The metal resin in then poured and permeated into the powders to manufacture the backup material. The experimental results show that the heat transfer performance of permeate method is better than that of pre-mixed method of powder and metal resin.
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