Quantitative Flowability Evaluation Using the Die Filling Testing Device

Flowability of powders is commonly evaluated using flow rate (ISO 4490, JIS Z2502, MPIF 3). However, in cases where the powder is not discharged from the Hall flowmeter, flow rate cannot be applied. Furthermore, the measured value of flow rate does not necessarily correspond to the flowability in the hopper or the fillability of die during the manufacturing process of sintered parts. The die filling test is a potential method for quantitatively evaluating the flowability of powders and is expected to be an alternative evaluation method to flow rate.