抄録
The damage and crush of rice grains by throwers have been studied in detail. The results obtained are summarized as follows.
1) In respect of the damage and crush of grains, the blade with nylon wire brush brought about better results than the one without brush.
2) The hardness of the blade had to do with the damage of grains. The increase of hardness resulted in the increase of the damage.
This tendency became more distinct with increasing of the lift of the thrower.
3) The damage of grains by the conveyer system was greater than that by throwers, so far as the lift was not so high.
4) The crush of grains by the throwers has a certain relation with the gap between the blade and the drum of the throwers.
When the gap was narrower than 1.5mm, the crush of grains was comparatively few. When the gap was from 1.5mm to 2mm, it was maximum. When the gap was over 2mm, it decreased, as the width of the gap increased.
