Rice polishing machine.

摘要

A rice polishing machine comprises a rotatable shaft (40), a polishing roll (60) mounted on the shaft for rotation therewith, and a perforated cylindrical polishing assembly (70) disposed in substantially concentric relation to the shaft (40). The cylindrical polishing assembly has its inner circumferential surface which cooperates with an outer circumferential surface of the polishing roll (60) to define therebetween a polishing chamber (72). Partition wall members engage with an outer circumferential surface of the cylindrical polishing assembly (70) at a location below an axis of the shaft (40) for dividing the outer circumferential surface into an arcuate bottom surface section and the remaining arcuate surface section and for defining an upper space (103) to which the bottom surface section is exposed and a lower space (104) to which the remaining surface section is exposed. An air delivery device (113) delievers air such that the air is introduced from the lower space (104) into the polishing chamber (72) through apertures (131, 231, 331, 431, 531) in the bottom surface section and then to be introduced from the polishing chamber into the upper space (103) through apertures in the remaining surface section. The air introduced from the lower space (104) into the polishing chamber (72) through the apertures in the bottom surface section of the perforated cylindrical polishing assembly (70) imparts an upward force to the rice grains which are liable to be collected and stagnated in the lower portion of the polishing chamber, to thereby make the rice grains uniform in density around the entire polishing chamber.