What Are the Different Types of Rice Milling Machines?

The rice mill is mainly composed of fixed wrench, tightening nut wrench, hair brush, lower hopper, grinding wheel, wire brush and so on. Using the mechanical force of mechanical equipment Guangsheng to peel and grind brown rice, the mechanical equipment used is called rice mill.

There are three main types of small-scale rice mills in China: namely, separate rice mills, combined rice mills, and air-jet rice mills.

Separate rice mills are easy to operate and low in price, but the models are aging and the quality of the milled rice is poor, and they are gradually being phased out.

The combined rice milling machine has good quality of processed rice, but its structure is complicated and the price is relatively expensive.

The air-blast rice mill has a good price-performance ratio. It can complete the shelling and white milling procedures at one time. The finished rice is white and bright. It has become the mainstream product in the market in recent years. ^[1]

With the gradual improvement of living standards, people have put forward higher requirements for the quality of rice, and the rice milling process has been rapidly improved. With the continuous improvement of rice varieties, in recent years, the yield of slender rice has become higher and higher. This kind of rice will have a large number of pop-ups due to its own reasons during the harvesting and threshing process. Traditional rice mills will break due to backward technology Rice rate increased. The components of the traditional rice mill are not arranged reasonably and the technology is backward. As a result, the air volume passing through the rice mill room is insufficient, the wind pressure is low, and the grain settles at the bottom of the rice mill room under its own weight. The sports area of meters is not fully utilized. If you want to improve the processing quality of rice, you need to use one or two rice mills to increase the pressure inside the rice milling chamber, but it will increase the rice temperature, coupled with the high burst rate of the original rice, during the rice milling process Will produce a lot of broken rice. Therefore, in order to reduce the broken rice rate and improve the quality of rice, a multi-machine light milling process must be used.

The multi-machine light milling process is to increase the number of rice mills to increase the moving area per unit of rice. However, by reducing the internal pressure of each rice mill and controlling the temperature of the rice grains during milling, the rice crushing rate is reduced and the Processing quality can cause a dramatic increase in cost. In order to reduce the cost and improve the processing quality of rice, a new type of rice mill has been developed. This model has greatly reduced the utilization rate of rice milling area per unit of output and the amount of air that penetrates the rice milling chamber. Broken rice rate. The milling process of brown rice uses friction and grinding to remove the rice bran layer. Friction milling requires high pressure and a certain polishing speed in the polishing chamber, so friction milling is also called pressure milling. Grinding rice does not require high polishing chamber pressure, but requires high line speed and rice milling rollers with many micro-blades, so grinding rice milling is also called speed rice milling. In fact, in any one rice mill, these two rice milling methods exist at the same time, but due to the different structure and parameters of the rice mill, any one of the rice mills has a dominant mill The rice method can be divided into friction type rice mill (iron roller rice machine) and grinding type rice mill (sand roller rice machine).

The overall structure

The negative pressure two-way multi-channel air inlet rice machine can be divided into grinding type sand roller rice machine and friction iron roller rice machine, which improves the utilization rate of the new rice milling machine and realizes one machine and dual purpose.

1. Grinding sand roll rice machine

The structure diagram of the grinding sand roll rice machine is shown in Figure 1. It consists of a rack and an exhaust fan. The rice milling chamber is fixed on the rack. The feeding device is installed in the upper part of the rice milling chamber. The air inlet is set at both ends of the hollow shaft. The rice outlet is equipped with a device for cleaning cold rice. The inclined guide plate is installed in the rice outlet. The lower part of the guide plate is equipped with a device for cleaning cold rice. The characteristics of the grinding type sand roller rice machine are that the pressure of the rice milling chamber is low and the line speed of the rice milling roller is high.

Because the grinding only exists between the rice mill roller and the brown rice, the brown rice and the bran drum, and the negative pressure bidirectional multi-channel air intake, the rice crushing rate is low. During the working process, the brown rice enters the end of the rice milling chamber from the feed hopper through the flow adjustment mechanism, and is pushed into the inside of the rice milling chamber by the rotating screw propeller. When the brown rice fills the rice milling chamber, the spiral advances continuously. Push the brown rice into the rice milling chamber to increase the pressure continuously. When the pressure of the brown rice group is large enough to overcome the resistance of the pressure door at the outlet, the outlet is opened, the rice grains are discharged from the rice milling room, and the brown rice is imported from the rice machine to The outlet is always subjected to grinding, and the skin layer is gradually peeled to become rice bran, which is discharged through the holes of the bran discharge cylinder, and finally rice milling is completed. A cool rice cleaning device is arranged at the discharge port to further cool the rice grains.

1. Place the rice mill on the workbench stably and plug it in

1. Before the brown rice enters the falling hopper, it should be checked for metal objects and stones, so as not to damage the grinding wheel.

2. After the milling process is finished, pull out the front rotating block to clean up the remaining sugar in the milling chamber to avoid affecting the accuracy of the sample.

3. The accuracy of white milling needs to be determined by the variety of brown rice. The number of samples and the milling time are suitable. The number of low-precision samples is 17-18g, and the milling time is shorter. The number of high-precision samples is 20g, and the milling time is slightly. long.

4. When the machine has been used for a long time and has been milled over high-moisture brown rice, the rice bran bonding wheel affects the whiteness. You can use a wrench to remove the wheel, brush the bran powder with a wire brush, and put it back in place to continue using. ^[1]