Know How - Extrusion

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Published: 11/1/2019
Last updated on 10/22/2020

Try This Approach to Clean Up Your Recycled Material
CO2 can be used as a totally “green” solvent to remove many kinds of contamination in recycled plastics without the need for toxic solvents.

Published: 11/28/2011
Last updated on 1/29/2020

Extrusion: How Much L/D Do You Really Need?
Just like selecting the extruder size and drive combination, the L/D should be carefully evaluated.

Published: 12/1/2019

What You Need to Know to Get into Coextrusion
Key considerations range from determining the right extruder sizes to tooling, matching material viscosities, and lots more. Take a look.

Published: 10/1/2019

Extruder Alignment: Important, but Only Half the Equation
The other half? Aligning and supporting downstream equipment. Here are best practices.

Published: 9/1/2019

Understanding Viscosity in Extrusion
Both the power-law coefficient and the consistency index must be considered to calculate viscosity.

Published: 7/1/2019

Cooling the Feed Throat and Screw: How Much Water Do You Need?
It’s one of the biggest quandaries in extrusion, as there is little or nothing published to give operators some guidance. So let’s try to shed some light on this trial-and-error process.

Published: 6/1/2019

Barrier Screws: Not All Are Created Equal
Let’s take a deep dive into parallel and crossing types and see where each fit in.

Published: 4/1/2019

Why Barrel Temperatures Have a Small Effect on Melt Temperature
Extruders are not like ovens. Tweaking barrel-temperature profiles will not influence melt temperature all that much. Here’s why.

Published: 3/12/2019

Simple Scale-Up Calculations for Melting
You can avoid complicated melting equations when designing or evaluating a screw by using simpler methods that can save time and provide good results.

Published: 1/1/2019

Unraveling the Complexity of Single-Screw Scale-Up
Variables such as shear rates, melting rate, residence time and conductive heating are all influenced in the scale-up.