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EFFECTS OF SCREW RESTRICTIONS ON THE PERFORMANCE OF AN AUTOGENOUS EXTRUDER
Author(s) -
SAHAGU JAIME F.,
HARPER JUDSON M.
Publication year - 1979
Publication title -
journal of food process engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.507
H-Index - 45
eISSN - 1745-4530
pISSN - 0145-8876
DOI - 10.1111/j.1745-4530.1979.tb00239.x
Subject(s) - plastics extrusion , cooker , channel (broadcasting) , product (mathematics) , shear (geology) , process engineering , automotive engineering , mechanical engineering , computer science , materials science , composite material , engineering , mathematics , computer network , geometry
The Brady Crop Cooker is a low‐cost autogenous extruder capable of manufacturing products suitable for human consumption in less developed countries (LDC). Versatility is achieved by the design of the extruder which directly affects its operation. One such design aspect is the inclusion of internal screw channel restrictions. The effects of location and number of restrictions on operation and product quality were studied. Results indicated that restrictions affected the location of the mechanical energy input and therefore temperature profiles along the screw. Increasing the number of restrictions also promoted cleavage of starch molecules due to the resulting higher shear in the screw channel.