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Comparison between Single & Twin Screw Feed Pellet Extruder

Single screw extruder is simple, using rotating belt way with a constant unadjustable spindle speed. It can get good blending through high speed operation in short time.

Solid conveying, melting, pumping and mixing occur simultaneously and are interdependent; nevertheless, it is inefficient and the process control is difficult. What’s more, the conveying capacity of single extruder is poor under high pressure, compared to the same power twin-screw extruder, its production is lower. This is because the transfer method is pressure sensitive, pressure will produce reflux, thereby the transmission efficiency is reduced. However, the single screw extruder purchase cost is lower than twin screw extruder.

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