How to make a stone mill, what is the principle of a stone mill?

Stone grinding is a kind of machinery used to process rice, wheat, beans and other grains into flour and pulp. It is usually made of two cobblestones. The mill is two layers of a flat surface, and the joints of the two layers have a texture, and the grain enters the middle of the two layers from the hole above, moves outward along the texture, and is ground as it rolls through the two layers to form a powder or slurry.

Specifically, the stone grinding comprises an upper stone grinding disc and a lower stone grinding disc, and the contact surface of the two grinding discs (the opposite grinding ring surface of the edge) is chiseled with neatly arranged grinding teeth to grind the material. The middle part of the grinding disc is chiseled with a chamber, and the middle part of the upper and lower grinding disc is directly opposite to the shaft to leave a certain gap, and under the rotation of the upper grinding disc, the driving material enters the grinding torus of the edge along the chamber.

After the stone mill is used for a long time, the contact surface of the two grinding discs will be worn, so that the distance between the middle part of the upper and lower grinding discs with the bore will be reduced, so that the material can not enter the grinding torus at the edge through the bore, and the stone mill needs to be trimmed at this time, that is, the middle part of the grinding disc needs to be cut off to a certain thickness, and the bore is re-polished to a certain depth, and the original distance of the middle part of the upper and lower grinding discs can be restored before it can be reused. Every time the stone mill is trimmed, it needs to be processed slowly by hand, which is very time-consuming and labor-intensive, and often takes several weeks to complete, which seriously affects the progress of the work.

Stone mill: A stone tool that uses human or animal power to peel or grind grain into powder. It consists of two short cylindrical stones of the same size and a grinding disc. Generally, it is erected on a platform made of stone or adobe, etc., and the lower fan (immovable disc) and upper fan ** moving disc are stacked on the stone or wooden grinding disc for receiving flour.

The contact surfaces of the two mills are chiseled with neatly arranged grinding teeth to grind the grain. There are two (small grinding and one) grinding eyes on the upper fan, which are used for leaking grain. There is an iron shaft between the two mills.

There is a large mill with a diameter of more than three feet six inches (meters), which must be pulled by three horses at the same time. Generally, the diameter of the mill is about 80 cm, and one person or a donkey can pull it. The diameter of the small mill is less than 40 cm, and it can be placed in a basket and shaken by hand for grinding pepper noodles.

If you add water while grinding, it is a water mill, which can grind tofu juice, which can be seen in the workshop of making tofu and starch in the past.

Grinding dough, etc., to twist solid things into small particles.

Finally the grains of wheat and something were ground into flour.

1. The principle of stone grinding.

1) There are regular grooves on the inside of the upper and lower fans of the stone mill, and the middle is deep and the outside is shallow, and there is a certain gap in the middle.

When the beans go down to the inside, they first enter the gap in the middle part according to the carved chute channel, and with the rotation of the upper fan stone mill, the gap obtained by the beans becomes smaller and smaller, and finally becomes powder.

2) Physical principle: It is the principle of leverage, labor-saving leverage. The chain arrest stone mill mainly uses a lever to drive the grinding disc to rotate to grind the things put into it.

2. Exploded view of the stone mill.

<> types of stone grinding. 1. Traditional disc stone mill.

In 1968, in the Han Tomb of Mancheng, Baoding City, Hebei Province, a stone mill about 2,100 years ago was unearthed, which was a copper and stone composite mill composed of a stone mill and a copper funnel. This is the earliest stone grinding object found in China so far.

2. Modern disc stone grinding.

The modern disc Bohengxiang stone mill retains the grinding part of the traditional stone mill, that is, two cylindrical rocks, and changes the traditional power generation device, from the original donkey to produce the power of grinding wheat to the power of grinding wheat generated by the motor, and at the same time increases the conveying device and the cleaning device. Compared with traditional disc stone mills, modern disc stone mills save labor, reduce the amount of labor, and improve the output of stone mills.

The conveying device is composed of main components such as large hopper, fan, base pulse air closure, shackron and pipeline. The cleaning device is composed of main components such as sieve silk, brush and round luo.

The above content refers to Encyclopedia - Stone Mill.

A stone mill is a type of milling tool that is usually used to grind food ingredients such as grains, rice and flour. It grinds ingredients into powders by the high-speed rotation, friction, and grinding of stones.

The role of stone grinding includes the following aspects:

1.Grinding: Stone grinding can grind food raw materials such as grains, rice and flour into powder, which is convenient for people to use in the process of cooking and making food.

2.Reduction process: The powdered substance developed by stone grinding can be used directly, and there is no need for other reduction processing.

3.Retain nutrients: Compared with ordinary mechanical mills, stone mills can better retain vitamins, trace elements, dietary fiber and other nutrients in grains due to the friction between the grinding stones, and improve the value of food for the elderly.

4.Improved taste: The flour processed by Shimo Shichang has a smaller particle size, a more delicate and sweet taste, and is more suitable for making pasta and pastries.

In short, the stone mill can grind grains, rice and noodles and other food raw materials according to different food needs, which can not only reduce the processing process, but also improve the nutrition and taste of food.

A stone mill is a traditional milling machine that grinds grains and other ingredients into powder by grinding stones. Such equipment has been used since ancient times and has been widely used in modern times. The principle used in stone grinding is friction and pressure, and its main parts are a grinding disc and a grinding rod.

The material to be ground is placed into the grinding disc, and the grinding rod will rotate on the grinding disc to grind the material into powder by friction and pressure.

Using a stone mill requires opening the stone mill first, placing the material to be ground into the grinding disc, then placing the grinding rod on the grinding disc and closing the grinding disc. When the grinding rod starts to rotate, it grinds the material into powder through the friction and pressure of the grinding disc. When using stone grinding, you need to pay attention to the cleanliness and hygiene of the grinding rod and grinding disc, and the grinding rod needs to be kept sharp for better grinding results.

In addition, it is also necessary to choose different grinding rod materials according to different materials to ensure the efficiency and quality of grinding.

The advantage of stone grinding is that when grinding the material, the temperature is relatively low, so the nutrients and flavor in the material can be retained. In addition, stone mills can grind various types of grains and other ingredients, such as coffee beans, nuts, spices, and many more. Since the stone mill adopts the traditional open-drain mechanical method, it does not need to consume too much energy, which is an environmentally friendly and energy-saving option.

In conclusion, a stone mill is a traditional grinding machine that uses the principle of friction and pressure. The use of stone grinding requires attention to cleanliness and hygiene and the selection of suitable grinding rod materials. Stone grinding has the advantages of retaining the nutrition and flavor of materials, grinding all kinds of ingredients without excitation, environmental protection and energy saving. <>

1.How grinding discs work Grinding discs are usually made of materials with higher hardness, such as silicon, quartz, sapphire, etc. The inner surface of the grinding disc is smooth and flat, which can withstand high pressure and wear.

When the grinding disc begins to rotate, the raw material enters the inside of the grinding disc through the feed pipe. Due to the rotation of the grinding disc and the action of gravity, the raw material is constantly subjected to impact and friction inside the grinding disc. At the same time, there is a water ring similar to a flow pool inside the grinding disc, which can make the raw material flow smoothly.

2.How grinding rods work Grinding rods are a hammered wear tool, usually made of ceramic or metal with a higher degree of hardness. The number and length of grinding rods are selected according to the size of the grinding disc and the characteristics of the raw material.

When the grinding disc starts rotating, the grinding rod starts rotating at high speed while moving inside the grinding disc. Due to its high-speed rotation and vibration, the grinding rod is able to quickly impact, rub and quickly crush raw materials. At the same time, in the process of raw material wear, the grinding rod will also be worn and deformed to a certain extent.

Terrazzo (also known as grinding stone) is a product that mixes aggregates such as crushed stone, glass, quartz and other resistant stones into cement adhesive materials to make coagulation products, and then grinds and polishes the surface.

The terrazzo made of cement adhesive material is called inorganic grindstone, and the terrazzo made of epoxy adhesive material is called epoxy grinding stone or organic grinding stone, and the terrazzo is divided into on-site pouring terrazzo and prefabricated plate terrazzo ground according to the construction and production process.

Traditional terrazzo has a huge market in China with its unique advantages such as low cost, arbitrary color parquet, easy construction and grinding and dismantling, and has been used in various types of buildings in urban and rural areas across the country with as much as one billion square meters of terrazzo floor.

The conventional practice of terrazzo mainly consists of the following steps:

1.Bottom layer cleaning: Brush the sand and slurry skin bonded to the bottom slippery base layer, and clean the floating soil on the surface.

Calming: According to the +50cm elevation line on the wall, measure the elevation of the board surface downward, and bounce the horizontal line of the board surface on the nearby wall.

3.Terrazzo slabs are soaked in water to dry the outer surface before paving the slabs.

4.Mortar mixing: When mixing wide and careful mortar, pay attention to controlling the amount of water added, knead the mixed mortar into a ball by hand, and wipe it with the brushing of the slurry.

5.Bottom watering and cement slurry: Clean the surface of the bottom layer on the ground and water it with water, and evenly apply the cement slurry to the bottom surface.

6.Laying cement mortar contact layer: After the cement slurry is completely air-dried, start laying the mortar contact layer.

Maintenance of grouting: After checking that there is no cracking and bulging on the surface, fill the gap with thin cement slurry, and wipe the overflowing cement slurry in time.

8.Polishing: The first time with 60 90 rough diamond grinding, the second time with 90 120 diamond grinding, the third time with 200 fine diamond grinding, grinding until the surface of the stone is flat, smooth, no pores.

9.Pickling and waxing: Use oxalic acid to scrub the surface layer of the grinding stone, wrap the wax in a thin cloth, and slowly sand on the surface layer until the surface is smooth.