screws
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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Injection Molding: Are You Using More Than 65% Of Your Barrel Capacity?
If you are, you are inviting Murphy—as in trouble—to the party.
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Sizing the Barrier Gap
Here’s a less complex way to properly size the barrier gap for barrier screws.
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How ‘Hydro Wedges’ Reduce Screw Wear
Using them only in the melting section provides for greater design freedom and negates the impact these devices can have on output and melt temperature.
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K 2016 Injection Molding: Rapid Pace of Development
Servo drives dominate. Other trends include multitouch screens, adding materials data to process controls, and Industry 4.0 connectivity.
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Which Barrier Screw for You?
It depends ... mostly on the melting requirements of the polymer.
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What Output Can I Expect?
Processors ask screw designers this question a lot. But neither output nor melt temperature can be predicted without details on the polymer and head pressure.
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Do You Have Screw Wear?
It’s generally caused by metal-to-metal contact, and your first indicator will be poor melt quality.
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Get Better at Swapping Out Your Twin-Screw Elements
Here’s what you need to know to safely and efficiently remove, clean, restage, and reinstall your twin-screw extruder screw set.
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EXTRUSION: Finding the Sweet Spot in Screw Design
The compression ratio of a screw does not provide enough detail on how it will perform. Screw design is a balancing act that takes many variables into account.
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