Extrusion Know How
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.
Read MoreRoll 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.
Read MoreTroubleshooting Screw and Barrel Wear in Extrusion
Extruder screws and barrels will wear over time. If you are seeing a reduction in specific rate and higher discharge temperatures, wear is the likely culprit.
Read MoreLooking 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.
Read MoreHow Screw Design Can Boost Output of Single-Screw Extruders
Optimizing screw design for a lower discharge temperature has been shown to significantly increase output rate.
Read MoreTroubleshooting Vent Flow Problems in Single-Screw Extruders
Vent flow can be a costly problem and a housekeeping nuisance. Here is some advice on how to eliminate it.
Read MoreThe 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 MoreExtruder Alignment: Important, but Only Half the Equation
The other half? Aligning and supporting downstream equipment. Here are best practices.
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.
Read MoreHow Much L/D Do You Really Need?
Just like selecting the extruder size and drive combination, the L/D should be carefully evaluated.
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