ホッパーの形状と粉体排出との関連性
1977 年 5 巻 2 号 p. 79-82
詳細
1977 年 5 巻 2 号 p. 79-82
The discharge of powder from a hopper under gravity is often stopped by the formation of bridging. The shape of hopper exerts a distinguished influence on bridging. The formation of bridging has been recognized by the fact that the bottom pressure becomes independent of the height of powder bed.
The pressure distribution in powder is calculated by solving the fundamental equation for the mechanical equilibrium in a two-dimensional model of asymmetric hoppers. Effect of the hopper shape on the formation of bridging is studied in the light of the calculated dependence of bottom pressure on the height of powder bed. The theoretical tendency of the discharge of powder seems to agree with the experimental one in some cases.
