KNOW-HOW - EXTRUSION

Extrusion Know How

Extrusion: How Hopper Crammers Can Help Feeding

A crammer can assist the flow of certain polymers into the extruder. But the design is not universal and very material dependent. Here’s what you need to know.
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Extrusion Know How

Extrusion: The Challenges of Extruding Highly Filled Polymers

These materials require screw changes and modifications in upstream and downstream equipment and operating procedures.
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Extrusion Know How

Extrusion: The Role of Polymer Density in Screw Design

Density affects the mass flow rate, and energy transfer is based on mass, not volume. As a result, polymer density enters into practically every calculation in a screw design.
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Extrusion Know How

Extrusion: The Facts About Barrel-Temperature Override

Cooling the barrel more may extract heat from the barrel, but not necessarily from the process. Here’s why.
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Extrusion Know How

Extrusion: The Importance of Proper Barrel Supports

Supports that allow the barrel to expand and contract easily will prevent alignment issues. Examine them periodically for proper operation, particularly if you’re experiencing excessive wear.
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Extrusion

How to Collect and Interpret Extrusion Process Data; Part 3

In this final installment, learn how process data can be used to identify and fix extrusion issues.
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Heating & Cooling

Extrusion Cooling: It’s All About Turbulence

Regardless of what you are extruding, in order to maximize cooling you need to generate turbulence at the heat-exchange surface.
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Extrusion

Sharper Dies Make for Smoother Extrusions

Dies that have a radius at the exit will result in poorer surface finish.
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Sheet Extrusion

Sizing the Barrier Gap

Here’s a less complex way to properly size the barrier gap for barrier screws.
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Extrusion Know How

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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