What kind of rice milling machine is better?

What are the classifications of rice milling machines? Which model mills rice without breaking it? What kind of rice milling machine is better? The following are classifications and characteristics of rice milling machines:

(I) Classification by Working Principle

1. Friction-type rice milling machine (also known as pressure-type rice milling machine)

The friction-type rice milling machine, also called the pressure-type rice milling machine, relies on strong friction to whiten brown rice. Rice milling machines that primarily use friction to whiten rice are mainly iron roller rice milling machines, and their models are relatively small.

2. Grinding-type rice milling machine (also known as speed-type rice milling machine)

The grinding-type rice milling machine mainly uses grinding to remove the outer layer of brown rice. The pressure inside the whitening chamber is relatively low, and the corresponding volume of the whitening chamber is relatively large. Therefore, the models of grinding-type rice milling machines are also relatively large, and their grinding rollers are mostly sand rollers.

3. Hybrid rice milling machine

The hybrid rice milling machine uses the combined action of friction and grinding to remove the outer layer of rice. The milling rollers can be either sand rollers or iron rollers. The pressure in the whitening chamber is between that of a milling-type rice mill and a scrubbing-type rice mill, making it a suitable machine with good processing results.

(II) Classification by Roller Shaft Installation Method

1. Vertical Rice Mill

The main shaft of a vertical rice mill is vertically mounted. Most are sand roller mills, with low whitening pressure, suitable for processing loosely structured, powdery rice. Vertical rice mills mostly use sand rollers.

2. Horizontal Rice Mill

The main shaft of a horizontal rice mill is horizontally mounted. Horizontal rice mills use sand rollers, iron rollers, and a combination of sand and iron rollers.

(III) Classification by Roller Material

1. Iron Roller Rice Mill

An iron roller rice mill uses iron rollers. The iron rollers are cast from white cast iron, requiring good surface quality and wear resistance.

2. Sand Roller Rice Milling Machine

A sand roller rice milling machine uses sand rollers as the milling rollers and belongs to the grinding type and mixed type of rice milling machine.

3. Sand and Iron Combined Roller Rice Milling Machine

A sand and iron combined roller rice milling machine can use either sand rollers or iron rollers, depending on the specific situation.

High-configuration rice processing equipment production lines mostly adopt multi-stage light milling processes: this process combination is two sand rollers and one iron roller, or one sand roller and two iron rollers, and polishing can also be changed to one polishing step. This flexible process can produce different grades of rice.

However, this multi-stage light milling process rice processing equipment has many individual machines, resulting in a large initial investment. Even higher-configuration rice processing equipment production lines use multiple polishing and color sorting stages, leading to an even larger investment in rice processing equipment. It should be noted that indica rice is fragile and often uses one or more vertical sand roller rice milling machines.