EXTRUDER SCREW

摘要

The capacity of an extruder fed with a high viscosity liquid having a volatile component may be limited by the ability of the high viscosity liquid to completely fill the flights of the screw in the barrel o f the extruder. The liquid may incompletely fill the initial sections of the screw and may be subject to a partial or complete vapour lock. This problem may be reduced by using a screw having in the section adjacent the feed port an increasing flight volume from the back to the front of the feed port. It may also be reduced in combination or independently through the use of guide vanes or baffles placed in an appropriate position of the extruder feed port.