A new apparatus was designed to improve the accuracy and reproducibility of alloy fluidity tested by spiral sample in the sand mould. Through automatic casting mechanism controlled by single-chip-microcomputer

the molten alloy is poured into the spirals at a scheduled temperature and constant pressure head. By the experimental analysis and comparing with the tranditional apparatus

the new apparatus show a great improvement in accuracy and reproducibility. The effects of pouring temperature on fluidity of aluminum alloys have been tested by the new improved apparatus

obtaining the relationship between fluidity and pouring temperature.