KNOW-HOW - EXTRUSION

Extrusion Know How

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.
#bestpractices #screws

Extrusion Know How

Telltale Signs of Screw Wear

Determining the cause of wear is the first step in eliminating it.
#bestpractices #screws

Extrusion Know How

Extrusion: Head Pressure and Output Stability

Use drag- and pressure-flow equations to analyze fluctuating output.
#bestpractices #processingtips

Extrusion Know How

Extrusion: How to Estimate and Control Head Pressure

You rightfully worry about melt temperature, but don’t overlook head pressure, because the two are closely linked and will influence line performance.
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Extrusion Know How

Extrusion: A Simple Way to Evaluate Your Screw Performance, Part 2

A hand-held calculator and some basic equations can help determine whether your screw is up to snuff.
#bestpractices #processingtips #screws

Extrusion

Extrusion: A Simple Way to Evaluate Extruder Screws

While there’s lots of data that influences screw design, processors usually don’t have access to it. So instead, try calculating drag flow to see if your screw is working properly.
#bestpractices #screws

Extrusion Know How

Extrusion: Barrier Screws: Metering Section or Not?

A barrier screw without a metering section can reduce output and increase melt temperature.
#bestpractices #screws

Pipe, Profile & Tubing Extrusion

Extrusion: Why There Are No Truly Universal Dies

Flow characteristics of different polymers vary considerably. So while adjustment features are available, for the most part dies must be designed for an individual polymer.
#bestpractices #dies

Extrusion

Cast vs. Integral: Which Feed Section Is Best for You?

Here are seven factors extrusion processors should weigh to help them decide between cast feed section versus an integral extrusion feed section.
#technologyinaction #bestpractices #processingtips

Extrusion Know How

Extrusion: Understanding Weld Failures

Hard-surfacing failures without evidence of burrs indicate possible weld bond issues.
#processingtips #screws