The effects of CO2 injection and barrel temperatures on the physiochemical and antioxidant properties of extruded cereals (sorghum, barley, oats, and millet) were studied. Extrusion was carried out using a twin-screw extruder at different barrel temperatures (80, 110, and 140°C), CO2 injection (0 and 500 mL/min), screw speed of 200 rpm, and moisture content of 25%. Extrusion significantly incre...

Accepted: 12/10/2014 Abstract Extrusion is a thermodynamic process which combines several unit operations including mixing, cooking, kneading, shearing, shaping and forming. The principles of operation are similar in all types: raw materials are fed into the extruder barrel and the screw(s) then convey the food along it. Further down the barrel, smaller flights restrict the volume and increase ...

This paper discusses our preliminary trials examining the particle size and particle shape of granules produced by different screw elements in a co-rotating twin-screw extruder. In general, conveying elements did not provide the necessary consolidation to allow large particles to grow in significant quantity, whereas the different mixing elements led to the large particles desired for tablettin...

A Pareto Local Search (PLS) algorithm was developed and applied to the screw configuration of co-rotating twin-screw extruders. This problem can be seen as a sequencing problem where a set of different screw elements are to be sequentially positioned along the screw in order to maximize the extruder performance. The results obtained were compared with previous results obtained with a Multi-Obje...

In this study, a pulp beating machine was used to premix the pulp fibers with high density polyethylene (HDPE) particles in water. The wet or pre-dried pulp fiber/HDPE mixture was then melt-compounded by a twin screw extruder. For further improving the dispersion of pulp fiber, some mixture was forced to pass through the twin-screw extruder twice. The resulting mixture was compression molded to...

This paper investigates foam granulation in a twin screw extruder as a new continuous wet granulation technique for pharmaceutical powder drug formulations. Foamed aqueous binder has a reportedly lower soak-to-spread ratio than drop or spray liquid addition in batch granulation. This work demonstrates a twin screw extruder configuration for foam granulation and subsequently compares the new app...

The use of 3D printers for manufacturing processes comes with the challenge filament replacement subsequent processes. This aforementioned including environmental problems posed by plastics wastes formed basis current work which is focused on design and construction a simple single extruder production filaments from waste polyethylene terephthalate (PET) rapid prototyping machines printers. Thr...