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Jim Frankland President
A Guide to Single-Screw Mixers
To design the best mixers for single screws, you must completely understand how polymer moves through a mixer channel or groove.
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The Role Barrel Temperatures Play in Melting
You need to understand the basics of how plastic melts in an extruder to properly set your process and troubleshoot any issues. Hint: it’s not about the barrel temperature settings.
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Maximize the Cooling Capacity of Your Extrusion Line
Maximizing output in extrusion requires a thorough understanding of not only the cooling requirements of the extruder but of the extrudate as well.
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Stop Shopping for a 'Jack of All Trades' Extruder
Some processors try to find “fits all” extruders to cover all processing possibilities. But you’d have to grossly overpower it to achieve this, and that’s expensive up front and will result in inefficiencies over time.
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Single vs. Twin-Screw Extruders: Why Mixing is Different
There have been many attempts to provide twin-screw-like mixing in singles, but except at very limited outputs none have been adequate. The odds of future success are long due to the inherent differences in the equipment types.
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Roll Cooling: Understand the Three Heat-Transfer Processes
Designing cooling rolls is complex, tedious and requires a lot of inputs. Getting it wrong may have a dramatic impact on productivity.
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Looking to Run PCR on a Single Screw? Here’s What to Keep in Mind
Just drop it in and mix it up? Sorry, there’s a lot more to it than that. Here is some of what you need to consider.
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The Right Way to Design Vents in Single-Screw Extruders
Designing vents for single-screw extruders requires understanding of polymer flow in the screw channels. Some designs are more effective than others. Here are some guidelines.
Read MoreWhy Compression Ratio is Important
Compression ratios have been pretty much standardized over the years, based on what has typically worked before. But there are quite a few variables that must be considered in order to get the optimum performance from your screw.
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Take Proper Care in Feeding Your Extruder
Everything that happens in an extruder starts at the feed throat, so proper attention to that zone’s temperature pays off in quality and productivity.
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Smaller Screws Impose Bigger Challenges
Very small extruder screws work just about like their larger cousins, but some critical differences make them harder to design and machine.
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Extruding PCR? Consider a Vented Extruder
You’ll need two-stage screws to extract volatiles that post-consumer reclaim will likely contain. Screw design can be a complex balancing act. Here’s what you need to know.
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