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Processing high oil content seeds in continuous screw presses
Author(s) -
Ward J. A.
Publication year - 1976
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02605697
Subject(s) - screw press , pressing , barrel (horology) , copra , hydraulic press , rapeseed , pulp and paper industry , environmental science , materials science , horticulture , mechanical engineering , food science , engineering , composite material , chemistry , biology
This paper covers a range of oilseeds from rapeseed to copra‐including groundnuts, cocoa beans, and palmkernels—and gives a very brief definition of screw press operation and its terminology. Screw press operation and its essential similarity to that of the hydraulic stroking press are discussed, including an outline of the functions of the various worm assembly stages and how they are basically achieved and essential objectives which must be met as meal passes along the barrel. Also covered are radial and axial pressure gradients within the machine and their effect on processing of high oil content seeds; rates of pressure buildup within the press and their effect on various different high oil content seeds; and materials of construction. Finally, the effect of seed pre‐treatment cooking and fines handling on the operation of a screw press on various seeds and essential differences between high pressure pressing and pre‐pressing for solvent extraction are discussed.