Abstract: A rice polisher for polishing rice, which is a preprocess necessary for producing pre-white rice having a favorable taste by using a small amount of water, a pre-polished rice producing apparatus that uses the rice polisher, a leveling device capable of uniformly leveling grains, and a pre-polished rice producing facility. The rice polisher includes a grain-lifting spiral for transporting white rice above from below, a water-pouring port for pouring polishing water, the water-pouring port being disposed at a head portion, a discharge port for discharging the white rice, the discharge port being disposed at the head portion, and a rice-polishing roll for polishing rice by agitating together with the polishing water poured from the water-pouring port the white rice pressurized by transportation by the grain-lifting spiral, with the polisher discharging from the discharge port the white rice that has been polished.

Abstract: A hulling apparatus that can improve hulling efficiency and hulling roll durability. A first air nozzle and a second air nozzle to cool surfaces of hulling rolls by blowing compressed air thereto are provided at a vicinity of the hulling rolls of the hulling apparatus. Consequently, a hardness of a rubber layer at the surfaces of the hulling rolls can be prevented from being lowered. Thus, hulling efficiency and hulling roll durability can be improved.

Abstract: Finishing allowances are given to a structure by a CAD/CAM system, and cutter path data for machining the finishing allowances are simultaneously generated. A surface finish is indicated on a die structure by a finishing mark. Finishing allowances are given to the die structure, producing a die structure with finishing allowances. Thereafter, a physical interference is confirmed on a screen image in order to generate cutter path data for a cutter head with respect to the die structure. If an interference occurs, the operator replaces a cutter with a longer cutter, and confirms again a physical interference. Cutter path data with respect to the die structure with finishing allowances can be generated substantially automatically.

Abstract: A rice-cleaning machine has a flowing-down friction type rice-cleaning chamber (18) formed around the lower portion of a main vertical rotary shaft (10) a grain sending chamber (79) formed around an upper portion of the main shaft (10) for forcibly sending grains to the rice-cleaning chamber (18), and a rising-up abrasion type rice-cleaning chamber (44) formed around the grain sending chamber (79). Rice-cleaning rolls (15) and (38) of the rice-cleaning chambers (18) and (44) are independently driven to rotate. A grain overflow port at an upper portion of the abrasion cleaning chamber (44) and a grain flowing-in port at an upper portion of the grain sending chamber (79) are communicated through by a connection passage (61). A rice grain supply apparatus consisting of a vertical cylinder body (46) and a vertical spiral (49) are connected to a side portion of the abrasion chamber (44).

Abstract: Prior art grinding type rice-cleaning rollers made of emery have been sintered members having a frustum of cone shape or an abacus bead shape. Their manufacture, therefore, is considerably troublesome, and they can be manufactured in only the special factories. In addition, once they are partly broken, they must be discarded. According to the present invention a plurality of rectangular elongate grinding type roller elements made of emery are arranged side by side on the outer periphery of a rotary member by the suitable means. Thus, it can be easily manufactured, so that its cost is very low. In addition, if it is partly broken, only the broken roller element may be replaced.

Abstract: The apparatus includes a hulling section, mounted above and in communication with an air-blow separating section which directs a blast of air onto the processed grain as it is discharged from the hulling section into a vibratory separating section which separates the mixture into hulled and unhulled rice. Unhulled and hulled rice lifters are disposed adjacent opposite sides, respectively, of said sections for supplying unhulled rice to the hulling section, and hulled rice through a valve selectively one of two discharge gutters for feeding grain back to the vibratory separation section or to other hulling apparatus. Means is also provided for vibrating the casing of the air-blow separating section.

Abstract: An abrasive roll rice polishing machine which comprises a vertical framework assembly, a vertical rotary shaft extending in the vertical axis of the framework assembly and journalled therein, an abrasive roll mounted on the shaft for rotation therewith, a vertically movable polishing cylinder provided within the framework assembly surrounding the abrasive roll in peripherally spaced relationship to the latter to define a polishing chamber therebetween, a hopper at the top of the framework assembly and a discharge port at the bottom of the polishing chamber.

Abstract: A vertical frictionally abrasive roll rice polishing machine in which a vertical rotary shaft extended in the vertically axial direction of a framework assembly, a vertical frictionally abrasive roll is mounted at the upper end of the shaft, a polishing cylinder surrounds the abrasive roll in coaxial and peripherally spaced relationship to the roll to define an annular polishing chamber therebetween, the polishing cylinder rotates and moves depending upon load applied thereto, the abrasive roll rotates but does not move vertically, a material supply passage is formed above the polishing chamber and a polished rice discharge passage is formed below the polishing chamber.