Exploring the: Extrusion Zone
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- Salt and Screw Cooling
- With both, watch how much you use.
Columns Published: 4/26/2012
- Water, Oil, Air, or None?
- There is no one 'best' barrel cooling medium, but there seems to be a shift in the industry toward air cooling.
Columns Published: 3/26/2012
- Well, It Worked on Brand X
- You need to give your designer a lot more data than that to make sure you get a screw that's right for you.
Columns Published: 2/21/2012
- Working with Color Concentrates
- Perhaps the greatest difficulty involving the use of color concentrates is specifying them appropriately for the material to which they are being added.
Columns Published: 2/21/2012
- ‘Wedging’ Can Cause Severe Screw Wear
- In a column I wrote for the July 2011 issue, I discussed the value of conducting “forensic” examination of worn screws when they are removed for clues to design flaws.
Columns Published: 1/28/2012
- The Melting Precision of Barrier Screws
- These types of screws offer more melt uniformity.
Columns Published: 12/27/2011
- How Much L/D Do You Really Need?
- Just like selecting the extruder size and drive combination, the L/D should be carefully evaluated.
Columns Published: 11/28/2011
- How Fillers Impact Extrusion Processing
- Their addition can significantly change the processing properties of a polymer.
Columns Published: 10/25/2011
- Benchmark Your Extruders For Quicker Processing Fixes
- Not recognizing output reductions and resolving them quickly can cost a lot of money. Benchmarking your machines will help.
Columns Published: 9/30/2011
- The Truth About Barrel Heating
- The main purposes of the heaters are to melt the polymer that remains in the barrel at cold startup, to assist in forming the initial melt, and to “trim” the barrel temperatures for specific purposes such as improving feed rate.
Columns Published: 8/23/2011
