Know How - Extrusion

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Published: 8/1/2010

Extrusion: Take Care of Your Rolls So They Can Play Their Role
In the sheet extrusion business, one of your most important manufacturing assets is your cooling rolls.

Published: 8/1/2010

Tooling: The Science of Profile Die Balancing
In our last column, we discussed the five things profile extruders need to know about profile die design—proper land length, land-length ratio, drawdown, considerations for sensitive materials, and decompression.

Published: 7/1/2010

Your Extruder's Best Friend
That's the melt pump, and its main purpose is to precisely control output to the die.

Published: 6/1/2010

Extrusion & Thermal Properties: Not Just for the Lab Guys
Do you really need to know how thermal properties of polymers affect extrusion?

Published: 5/1/2010

Single-Screw Mixing 101
Almost all processes using a single screw require some degree of mixing, whether it’s just to homogenize regrind with virgin resin or to mix in some color concentrate.

Published: 5/1/2010

How to Spec a Flat Die
So it’s time for you to buy a new die for film or sheet.

Published: 4/1/2010

How Much Regrind Can You Handle?
Most extrusion operations generate scrap, and in the case of sheet for thermoforming it can exceed 70% of total output.

Published: 3/1/2010

Don't Get Burned by Adapters & Flow Pipes
Does degraded or burned polymer seem to show up when you least expect it?

Published: 3/1/2010

Communication Is Key in Designing Blown Film Dies
Over the years I have bought, designed, or helped design quite a number of blown film dies.

Published: 2/1/2010

Having Output Problems? Check Your Feed-Port Design
With an extruder, like all other devices, “it can’t come out unless it goes in first.” That’s the first thing I remember when I am asked to figure out why an extruder is performing below expectations.