摘要：为探究球形玻璃珠在模腔中的流动特性,研究玻璃珠直径对空气敏感指数的影响;用高速相机记录直径为1. 99 mm的玻璃珠在送料靴-模具模腔填充试验系统的填充过程,研究3种送料靴速度对填充模腔的过程的影响,并定量研究玻璃珠的临界填充速度。结果表明:当玻璃珠的直径小于0. 37 mm时,玻璃珠的填充流动受空气影响;当玻璃珠直径为1. 99 mm时,因空气敏感指数特别大,其流动几乎不受空气影响;送料靴速度在200、400 mm/s时,玻璃珠流动较为平稳,以Hopper流动为主;但送料靴速度在1 000 mm/s时,玻璃珠流动不是很平稳,以Bulk流动为主;玻璃珠填充模腔的临界速度为270. 7 mm/s,指数n为1. 040 8。

Abstract: In order to study the flow characteristics of spherical glass beads during die filling，the influence of the diameter of glass beads on the air sensitive index was studied; high speed camera was used to record the die filling process of 1．99 mm glass beads using shoe-die filling system，and the influence of three kinds of shoe speed on die filling process was studied，and the critical filling speed of glass beads was quantitatively studied．The results conclude that when the diameter of glass beads is less than 0．37 mm，the flow behavior of glass beads is affected by air; when the diameter of glass beads is 1．99 mm，the air sensitive index is very large，and the flow behavior of glass beads is almost unaffected by air; when the speed of feeding shoe is 200 or 400 mm/s，the flow behavior of glass beads is stable，and Hopper flow is dominant; while the speed of feeding shoe is 1 000 mm/s，the flow behavior of glass beads is not very stable，and Bulk flow is dominant; the critical filling speed of glass beads is 270．7 mm/s and the exponent n is 1．040 8． 

Keywords: spherical glass beans; die filling; flow characteristics; air sensitive index; feeding shoe velocity; critical filling speed