Compounding Extruders

The TEM series of corotating, intermeshing twin-screw extruders has high torque and high screw speed. It comes in 41- to 136-mm models. The increased torque of the redesigned gearbox is said to yield high-quality products at a low resin temperature.

The TEM Series reportedly provides 15 percent higher torque per free volume than similar-sized extruders of different design. The higher torque enables the extruder to produce more horsepower, which in turn creates higher throughput rates. Higher torque also allows greater filling of the screw flights, reducing the overall average shear rate and the final melt temperature.

The high torque per free volume yields a low melt temperature and the ability to run at higher speeds. The higher screw speed increases power input and production rates nearly linearly. Short residence times reduce the product?s heat history.

The TEM Series has unique vent ports and quick-clamp die-head design for reduced contamination and maintenance, while maintaining a smooth flow of material.

Standard TEM Series? barrels are made using a carbide lining (or alternate 10V liners) for wear resistance. The barrel design combined with the use of screws made from wear-resistant steel alloys is said to improve overall endurance of the machine compared to conventional-type models. The different configurations include feed barrels, vent barrels, closed barrels, and side-feed barrels.

NFM/Welding Engineers Inc.
Massillon, OH; (330) 837-3868;
www.nfm.net