Abstract
In order to develop hulling ability of rubberroll typed rice huller, author made 3 peculiar hulling mechanism of side-sliding type (B type) which 1 roll slide right and left by cam, and cross axis type (C type) which combine rubber disk and roll, and slant axis type (D type) which 1 roll axis slant to horizon, and compared hulling ability with common type (A type) by experiments.
Obtained following conclusions:
(1) B, C, D type show better ability than A type on the point of view of any supply poses of unhulled rices.
(2) D type show very high hulling percentage (98-99%) on the point of view of horizontal supply pose of rices which other type show the worst ability.
(3) On the continual supplyed experiments, the case of wide gap of 2 rolls, D type show better ability than my expectation, but the case of narrow gap the highest percentage is no more than 97.5%. However on the case which its work and structure are fine, I seem its hulling percentage show nearly 99% as well as concludable by results of basic experiments.
(4) Damage of hulled ricer by D type yield on the gap abour 1mm, as far as narrower it make numerous.
(5) D type show the best hulling ability and its mechanism is comparatively simple, and thenceforth it would be able to expect for practical use.
