Improved Material Control 

• Allows operator to regulate feed materials to a process.
• If front portion of screw can’t extrude the plastic as rapidly as the rear portion, the excess flow will be forced out the vent.
• Careful regulation of the volume of material which is metered to the rear feed section of the screw.

Improved Material Processing

• Starved screw has a continuous air passage directly behind the spiraling screw flight to allow vapors to easily escape back through the feed throat.
• Starve feeder itself provides a vent to atmosphere so vapors don’t need to travel up through the cold resin in hopper.
• Prevents vapor and steam from re-condensing in the feed zone and hopper and carried into the screw over and over again.

No Calibration 

• Simply select the percent of full flow desired, e.g. 70% or 80%.
• Microprocessor self-calibrates by first matching the extrusion rate and automatically cutting back to the selected reduced starve rate of feed.
• No calibration of system required.