Rice huller

From Wikipedia, the free encyclopedia
Jump to: navigation, search
A rice huller able to use several sources of power
An old-type mechanical huller, driven by a gasoline engine
An electric rotary huller

A rice huller or rice husker is an agricultural machine used to automate the process of removing the chaff (the outer husks) of grains of rice. Throughout history, there have been numerous techniques to hull rice. Traditionally, it would be pounded using some form of mortar and pestle. An early simple machine to do this is a rice pounder. Later even more efficient machinery was developed to hull and polish rice. These machines are most widely developed and used throughout Asia where the most popular type is the Engelberg huller designed by German Brazilian engineer Evaristo Conrado Engelberg in Brazil and first patented in 1885.[1]

The Engelberg huller uses steel rollers to remove the husk. Other types of huller include the disk or cono huller which uses an abrasive rotating disk to first remove the husk before passing the grain to conical rollers which polish it. Rubber rollers may be used to reduce the amount of breakage of the grains, so increasing the yield of the best quality head rice, but the rubber rollers tend to require frequent replacement, which can be a significant drawback.[1]

Sample mechanism[edit]

Drawing of the mechanism of a rice hulling machine from 1942

See also[edit]

References[edit]

  1. ^ a b Randolph Barker, Robert W. Herdt, Beth Rose (1985), "Rice Milling", The Rice Economy of Asia 2, pp. 174–177, ISBN 978-0-915707-15-7