Abstract: This article performed a comparative investigation on the design feature, transport mechanism, melting heat source and melting model of traditional singlescrew extruders and groovedbarrel singlescrew extruders. Melting rate, melting lengths and original melting cite of the three types of singlescrew extruders with different structures were simulated and effect of the barrel structure on melting performance of singlescrew extruders was investigated. The results indicated that singlescrew extruders with a groovedbarrel is superior to traditional ones in structure, mechanism and performance. The melting performance can be improved significantly for singlescrew extruders by extending the barrel groove from the solid conveying section to the melting one.

Key words: single screw extruder, grooved barrel, plastic property