What is a co-rotating twin screw extruders?

A twin screw extruder is an advanced engineered machine consisting of two inter-meshing co-rotating screws mounted on splined shafts along a process barrel. The screws are made in modular segmented sliding disks with different geometries to process a great variety of materials. In addition this screw design is self-wiping, a feature that eliminates stagnant zones over the entire length of the process section. The final results are high mixing efficiency with perfect self-cleaning and quality driven with sizeable output results. Twin screw extruders are more and more used in several industries such as polymer, mechanical recycling, composite materials, chemical and food industries . 

Co-rotating inter-meshing designs were developed and applied first time in the 30's for mixing and pumping ceramic paste. The first commercial machine of this type was invented by Colombo from LMP (Italy) for thermoset and PVC processing.

ICMA has made proper this precious background and today can offer a modern and advanced complete range of co-rotating extruders at max speed & torque from 18 to 175 mm, all already manufactured and in operation for our customers.

Extruders are designed according to the specific process and optimized to fully exploit the engineered modularity. High-performance barrels constructed of nitride steel can be supplied in different L/D ratios with air or water cooling system options and equipped with optional wear-resistant liners.

Co-rotating Extruders



 

Screw Diameter (mm) Da/di Md/a^3 (Nm/cm^3)
per shaft
Maximum Screw Speed
(U/min)
181,5512,51200
251,55151200
301,55181200
401,55181200
501,55181200
531,65161200
601,55181200
701,55181200
801,55181200
901,51181000
961,65151000
1101,5517900
1121,6515900
1401,5515600
1751,5512,5300
2201,5512,5300

 

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