鑄物砂の透過能に就て

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Characteristic of permeability of molding sand was made clear by inspecting the theoretical aspect which thought the space of molding sand the capillary tube due to comparing with the result of the experiment. Permeability in this report is ability by which viscous fluid is made flow through porous materials. The results are as follows ; 1. The approximate equation showing permeability of molding sand was led as follows ; K=0.0087{p3/(1−p)3}{(1−p)2/3}R2 p = degree of porosity R = radius of green sand (assuming a globe) 2. The experimental results agreed quantitatively upon the above equation and considerably in quantity. 3. The more circular the sand, the more the permeability. 4. Permeability becomes smaller by mixing sand. 5. Permeabilities of air and water agreed upon the equation. 6. The results obtaind can be considerably explained by thinking spaces of sand capillary tubes and by calculating head of water which sand absorbs. (M. I.)
Japan Foundry Engineering Societyの論文