Extruders

Larger L/D Ratio

The 45/97mm conical twin screw, discharges like a parallel 45mm, feeds like a parallel 97mm & matches the gearing of a parallel 110.

A conical 45mm extruder can match output of 65mm parallel, the intake section has surface area and gentle plasticizing of a 100 mm parallel, while only the metering section has the excess friction and shear of a 45 mm parallel.

The small screw front face results in a low axial force on the screws.

Optimized Screw Geometry

Degressive pitch in the feed & compression zone ensures the continuity of compression, hence there are no pressure peaks, which is in favour of a prolonged life of the gear box.

In the metering section, the meshing surface area is less, which gives lower shear energy input, and in addition, the shear rate is further reduced because of the conical screw design.

Life of Gears

The pinion gears of conical twin screw lasts much longer than those of parallel twin screws.

As the center distance is much larger, the gear pinions have larger diameter which increases the life of the gears.

The life of gear pinions increases with the cube of the diameter, which enhances the reliability.

Homogeneous and Better Melt Quality

The meshing surface area of conical twin screw is larger in the plasticizing section which results into higher but controllable energy input through shear.

In the metering section, the meshing surface area of conical twin screw is less, giving lower energy input and hence homogeneous melting.

Ease of Maintenance

The conical twin screw is taken out from the backward direction.

The barrel is simply moved to the side which results in higher productivity by saving machine down time.