Abstract
Regression analyses (stepwise procedure) were carried out using a FACOM 270-20/30 computer on the working porosity and the coefficient of weight variation of strip-packages. The results showed that 85% of the variance in the working porosity could be accounted for by the factors μi/k, α, and S, and that 79% of the variance in the coefficient of weight variation could be accounted for by the factors Dp/Ddie and S. In addition, the results of analysis of variance (ANOVA) showed that the overall variance in weight variation might be reduced to acceptable values by minimizing the volume difference among dies, and by sifting off the cohesive fines. The effect of glidants on the reduction of die wall friction was evaluated by the regression equation, which gave estimated values for the working porosity and the coefficient of weight variation of the modified particles.
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