論説
鋳肌の研究（第3報）
(単一粒子と複合粒子の測定結果)
1950 年 22 巻 1 号 p. 14-25
詳細
1950 年 22 巻 1 号 p. 14-25
This paper is the results of an investigation of surface quality of castings produced in the mold made of silica sand containing clay and graphite. The outline is as follows :
Group 1－Single grain containing scaly graphite. The mold containing more scaly graphite produced fine surface of castings in case of coarse sand.
Group 2－Single grain containing granular graphite. The granular graphite usually produced fine surface of castings in case of fine sand.
Group 3－Compound grain. A. F. A. fineness number is an important function for surface roughness of castings.
Group 4－Kinds of graphite. The scaly graphite produced better surface than the granular graphite.
Group 5－Considerations. If the amount of graphite plus clay is below 23 per cent, it will be R=CS. But above 25 per cent, it will be R=CS+b.
