During the operation of the combined rice mill, the brown rice flows into the grinding chamber through the adjustment mechanism from the feeding hopper, which drives the rotation of the propeller at the end of the year to grind the rice. In the back chamber of the brown rice mill, the drill continues to push the pressure inside the brown rice and rice grinding chamber to increase. When the pressure of the brown rice group is high enough to overcome the resistance, the discharge port pressure door and discharge port open, and the rice grains are discharged from the rice milling chamber. The brown rice is ground from the inlet to the outlet of the rice mill. The cortex gradually peels off and turns into rice bran, which is discharged through the holes in the rice bran tube and ultimately completes rice milling. The discharge port is equipped with a cleaning and cooling device to further cool the rice grains.
The schematic diagram of the structure of the friction type iron roller rice mill is shown in Figure 2. The characteristic of a friction type iron roller huller is that the pressure in the rice milling chamber is high, and the linear speed of the white roller is slow. Due to friction in the whole rice milling room, involving every piece of brown rice, the grinding uniformity is high, but the corresponding rate of broken rice is also high. Therefore, this iron roller rice machine is suitable for processing keratin rice with good toughness and high particle strength.
The rice milling room is the core part of a combined rice milling machine. There are hollow shafts, sand rollers, iron rollers, rice sieves, etc. The hollow shaft, screw head, and spindle press set are shown in the diagram of the combined rice mill. A sand roller with a ventilation hole is installed on the outer side of the hollow shaft, and a rice sieve is installed on the outer side of the sand roller, which is fixed on the rice sieve. The spiral head is fixed on the feeding hollow shaft, and the axial pressure sleeve is fixed on the outside of the spiral. The spiral head provides an air intake hole, the axial pressure sleeve provides an air intake hole, and the hollow shaft provides an air inlet and two air inlet ends to form a room for the hollow shaft rice milling outside the sandwich intake channel. From the combination rice mill, it can be seen that the air inlets 1 and 2 form a bidirectional air inlet for the main vertical shaft, and the air inlet channel becomes four channels. The increase in air intake and pressure in the rice grinding chamber keeps the material in a suspended state, greatly reducing the influence of gravity on the material and improving the rice grinding efficiency. The indoor pressure of rice milling tends to be consistent with the expansion of the inlet air area. The negative pressure strong exhaust fully reduces the temperature of the rice, making the bran discharge more fully and less prone to blockage. It effectively utilizes the screening area, reduces the crushing rate, and improves the yield.
1. Place the combination rice mill flat on the workbench and plug in the power. 2. Determine the grinding time and adjust the timing knob. 3. Remove the pressure from the hopper and place 17-20g of brown rice (with a moisture content not exceeding 15%) into the hopper, allowing it to flow into the grinding chamber. First press the power button to start, then put it down. 4. When the specified time is reached, the rice grinder will automatically stop, take out the hopper first, and remove the bran. Insert the hopper and then take it out. Turn the front rotating handle to the appropriate angle to allow the polished rice in the grinding chamber to fall into the hopper. Set the timing knob to 0, press the power button to let the grinding wheel spin for a few seconds, causing all the rice particles in the grinding chamber to fall off. Then, pull out the hopper and sieve it to obtain the measured polished rice.