Abstract:

An approxi‘mate analytical model describing the melt conveying under the effect of single screw vibration was established by using the self-modified Tanner constructive model.and the coefficient reflecting the effect of vi-bration force field on the apparent viscosity of the melt was formulated according to the theory of equal viscosity dis-sipation energy.Experiments were then carried out to reveal the effect of vibration force field on the melt conveying
in an extruder with single screw vibration,and to reveal the head pressure and the screw characteristics varying with the vibration frequency and amplitude.The results of theoretical analysis and experimental investigation indicate that the melt conveying under the effect of single screw vibration can be performed in low pressure,which may also result in the softening of the screw.

Key words: melt conveying, vibration, single screw, head pressure, screw characteristics