Design and Fabrication of a Mono-Bloc Mixer Extruder Machine for The Production of Gum From Cassava Starch

Year 2020, Volume: 4 Issue: 1, 29 - 35, 27.03.2020

Ayodeji Omotehinse

Abstract

The machines for gum production from cassava starch are very
expensive and complex which made it difficult for local cassava farmers to
procure, install and operate. A simple machine known as Mono-bloc mixer
extruder machine for the production of gum from cassava starch was designed and
fabricated using locally available materials. Several experimental procedures
were carried out which include the selection of materials for the machine,
design calculations for the various parts of the machine, performance
evaluation test and efficiency determination. Performance evaluation test and observation
revealed that for best results, the cooking time of the starch solution with other
gum additives should be 30minutes and the cooking temperature had to be in the
range 80⁰C
– 95⁰C (within the dextrinization zone).
The results also revealed that the designed and fabricated machine could
produce gum from cassava starch effectively and easy to install, operate and
maintain. The machine produced had a capacity of producing 5.175litres of
dextrin gum per minute and an efficiency of 85%.

Keywords

White dextrin; dextrinization temperature; machine design; fabrication; mono-bloc mixer.

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