Conical Twin Screw Barrel

Our conical-twin screw barrel is mainly used for processing PVC products, such as PVC pipes, profiles, sheets, pellets and films. Alliance Technology series of conical twin screw barrels bring advantages such as long lasting service life, high output and better mixing and improved homogeneity. The screw geometry design has been further optimized and can also be customized according to your specific PVC material formulations.

Counter-rotating twin-screw extruders are used mainly for processing PVC products, such as pipe, profile, sheet, pellets and film. The parallel twin screws and barrels are widely used in the extrusion of PVC pipes, PVC profiles and PVC pelletizing.

Twin screws are divided in parallel and conical configurations.

Counter-rotating twin screw extruders have two screws that spin in the opposite direction. Also often intermeshing this style of machine is usually found in the profile, PVC or wood composite industry.

These machines typically have a much lower screw rpm and generally have much smaller L/D ratios. The screw direction allows for less shear than a single or co rotating machine.

The two styles of machines within the counter-rotating extruder category known as parallel twin screw extruder and conical twin screw extruder. A parallel twin screw has a consistent barrel diameter through the entire barrel. A conical twin screw extruder has a taper. The feed section is much larger than the end of the barrel. Both counter rotating machines with often have barrel venting. The barrels and screws of these machines are not modular so they may need to be changed for your specific application.