Extrusion Know How
Sizing the Barrier Gap
Here’s a less complex way to properly size the barrier gap for barrier screws.
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Optimize Feeding to Get More Money in Twin-Screw Compounding
Follow these practical examples to improve the feeding efficiency and productivity of your process.
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How ‘Hydro Wedges’ Reduce Screw Wear
Using them only in the melting section provides for greater design freedom and negates the impact these devices can have on output and melt temperature.
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Extruding with Fillers
You can use the reference point from processing unfilled polymer to determine whether you can run filled resin on your current system.
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Don’t Build In Melt-Temperature Variations
It’s not unusual for polymer to exit the extruder with a uniform melt temperature, only to be fouled up by downstream flow pipes and the like. Here’s how to avoid this.
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How to Collect & Interpret Process Data in Extrusion
The first installment of this three-part series focuses on proper use of a data- acquisition system.
Read MoreHow to Collect & Interpret Process Data in Extrusion: Part 1
The first installment of this three-part series focuses on proper use of a data- acquisition system.
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Which Barrier Screw for You?
It depends ... mostly on the melting requirements of the polymer.
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What Output Can I Expect?
Processors ask screw designers this question a lot. But neither output nor melt temperature can be predicted without details on the polymer and head pressure.
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Extruding Very High-Flow Polymers
Screw designs not suited to process lower-viscosity materials will result in poor melt quality and lower outputs.
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