What’s the point of stone grinding?

Folks regard the stone mill as the "green dragon", and you must not sit on the stone mill on the grain farm. Sitting on a stone roller is like "pressing the green dragon head", which will definitely offend the gods and be detrimental to the summer harvest. There is also a common proverb: "If you sit on a stone roller, your crotch will be rotten, and you will miss less food." "Rotten crotch" is the punishment for those who sit on the stone roller; "less food" is the punishment for those who use the stone roller.

Stone mill introduction:

Stone mill is a machine used to process rice, wheat, beans and other grains into powder and pulp. At first, human or animal power was used. In the Jin Dynasty, the Chinese working people invented water mills powered by water. Usually made from two cobblestones. The grinding mill has two flat layers, and the joints of the two layers have textures. The grain enters the middle of the two layers from the upper hole, moves outward along the texture, and is ground as it rolls across the two layers to form powder.

Extended information:

Mo, originally called Wei (wei), was only called Mo in the Han Dynasty.

The development of stone grinding in my country can be divided into three periods: early, middle and late:

From the Warring States Period to the Western Han Dynasty is the early period. During this period, pits were the dominant form of tooth grinding. The shapes include rectangle, circle, triangle, jujube stone, etc., and the shapes are diverse and extremely irregular;

The Eastern Han Dynasty to the Three Kingdoms period was the middle period. This period was the period of diversified development of the grinding teeth, and the shape of the grinding teeth was radiating. Type divisions are diagonal, including four-zone, six-zone, and eight-zone types;

The late period is from the Western Jin Dynasty to the Sui and Tang Dynasties (to the present). This period is the mature stage of the development of stone grinding, and the mainstream of tooth grinding is the eight-zone type. Slash type, there is also a ten-area slash type.

Grinders use human power, animal power and water power.

The mill using water power as power was invented around the Jin Dynasty. The power part of the water mill is a horizontal water wheel. The upper fan of the mill is installed on the vertical axis of the wheel. The flowing water drives the water wheel to drive the mill to rotate. This kind of mill is suitable for installation in places where the impulse force of water is relatively large.

If the impulsive force of the water is relatively small, but the water volume is relatively large, another form of water mill can be installed: the power machine is a vertical wheel, a gear is installed on the axle, and a flat wheel is installed on the lower part of the grinding shaft. Gears connect. The rotation of the water wheel is caused by the gears that rotate the mill. These two forms of water mills have relatively simple structures and are widely used.

When history developed into the 1970s, people cleverly combined ancient technology with modern elements to create stone grinders driven by electric motors, including two styles of stone grinders and disc grinders. Stone grinding and roller stone grinding.

The grinding part of the chip stone mill is divided into fixed and rotating parts, forming a horizontal structure. The fixed part is a half cut out on one long side of a rectangular stone that matches the rotating part. A cylindrical groove, the rotating part is made into a cylinder, and a hole is drilled in the middle to penetrate the transmission shaft. The surface of the contact area between the semicircular stone groove and the rotating cylinder is engraved with patterns similar to ancient stone mills, and the corresponding shielding of the transmission part forms a combination of ancient and new. The product of;

The grinding part of the roller stone mill is a roller-shaped cylindrical rock, shaped like a steel mill roller, and the surface is engraved with patterns similar to ancient stone mills.

Reference: Baidu Encyclopedia-Stone Mill