Host: The Japan Society of Mechanical Engineers
Name : [in Japanese]
Date : September 03, 2017 - September 06, 2017
In recent years, lightweight heat sinks with high heat dissipation manufactured by die-casting are in demand. The material which is generally used in die-casting is ADC12 alloy. However, it is quite difficult to manufacture heat sinks using ADC12 alloy whose fin-top-thickness is thinner than 1mm. In this study, we used Al-25%Si alloy, which had been found more suitable to cast thinner and lighter heat sink models, and investigated how the rate of heat dissipation is influenced by the following factors; (1) kind of the alloy, (2) the thickness of the fin, (3) the height of the fin, (4) the thickness of the base and (5) the number of fins. Measurement results influenced on heat dissipation neither difference in thermal conductivity of the alloys nor thinning of the fins. Regarding the shape of heat sink models, increasing the fin height was effective for improving the heat dissipation under the experimental conditions.
