Coffee grinder introduction: the grinding plate of the bean grinder-flat grinding plate, conical grinding plate, ghost tooth grinding plate

There are many paradoxes in the coffee industry. There are many very simple reasons to pretend to be more sophisticated than nuclear projects. Full of nonsense data, plus a meaningful smile! Coffee is a drink, and if it doesn't taste good, it's zero! If it doesn't taste good, don't pull the data! Which bean grinder is better? Why not ask which bean grinder is more appropriate? It's a good time to come. Choose the appropriate grinding plate according to the conditions and needs of guests. There is no 100% authoritative regulation in the coffee industry. Diversification is the origin of the world. Since many people are struggling with bean grinders, here are some practical information.

1. The grinding standard is the same, but the flavor is different.

The core grinding plate of the bean grinder is mainly divided into cone grinding plate, flat grinding plate, ghost tooth grinding plate, which of the three different grinding plates is better? For the same beans, the taste of the coffee entrance is different when the grinding degree of the bean grinder with three different plates is basically the same. Although the main flavor is the same, but the details of the structure is very different! Why?

two。 The structure of powder particles determines the flavor

After grinding, the structure of powder particles is completely different, cone grinding plate, flat grinding plate, ghost tooth grinding plate. Through grinding, it can be observed that the powder structure and shape of different knife shapes are completely different. The effect of powder structure on the flavor of coffee is also related to whether the extraction is uniform or not, which has little to do with the extraction rate. Even if the extraction rate is the same, the flavor is still different, which is due to the uneven extraction.

Advantages and disadvantages of flat grinding plate:

The flat knife bean grinder is composed of two upper and lower cutter heads, and the base is fixed on the motor. When the motor starts, it rotates the upper and lower cutter heads to produce cutting action.

When the coffee particles fall from the middle, the knife head rotating at the bottom will spin the coffee beans to the outside and push the coffee beans into the tooth cutter part for grinding.

The upper and lower cutters of the flat knife are placed in parallel, so the coffee beans need to rely on the rotation force of the bottom knife head to push the coffee beans into the knife head, so the weight of the coffee beans placed on the top will affect the uniformity of the coffee beans entering the knife head.

Furthermore, it affects the uniformity of grinding; in addition, the number of collisions between coffee beans increases due to pushing, which leads to an increase in the proportion of fine powder. This is the reason why the particle uniformity of the common flat knife bean grinder is slightly worse and the fine powder is more. However, the coffee particles ground by the flat knife are flaky, and the flake can increase the area of the cell wall, so using the flat knife can increase the concentration and extraction rate of coffee in a short time, so that the aroma of coffee can be significantly improved in a short time. At the same time, because the shape is long and the volume is smaller, when the extraction time becomes longer, the granular xylem will absorb too much water, resulting in increased miscellaneous flavor and astringent taste.

Advantages and disadvantages of cone grinding plate:

The conical knife grinder places a conical cutter head at the bottom, and then grinds it with the outer ring cutter head. After the coffee bean falls from above, it will pull the coffee bean down with the rotation of the conical cutter head, and then produce grinding action. Because of the relationship from top to bottom, the particles can push the coffee out without pushing. Compared with the peace knife grinder, the number of collisions between the particles will be reduced a lot. Therefore, the proportion of fine powder produced by the cone knife will be much less than that of the flat knife, and the uniformity of coffee grinding will be greatly improved. The cone knife grinding particles will be nearly granular, resulting in a longer water absorption path of coffee particles, and it will take longer for the interior to come into contact with water, so the cone knife particles will release less soluble matter at the initial stage, resulting in a low concentration in a short period of time. At the same time, because the shape is granular, even if extracted for a longer time, the xylem absorbs less water and is less likely to produce miscellaneous and astringent taste.

Advantages and disadvantages of ghost tooth grinding plate:

The coffee powder particles of ghost tooth grinding are close to round, and the proportion of coarse powder and fine powder is more uniform, so the coffee taste is cleaner, the flavor is more three-dimensional and full, but the machine price is higher.

[summary]

When you need to get a high concentration of coffee in a short time, the flat knife grinder is a good choice, and the high concentration will also make the aroma rich, so the aroma of the flat knife will be much more obvious than that of the cone knife; when a better taste is needed, the granular coffee powder produced by the cone knife can reduce the time for xylem to come into contact with moisture, although the aroma is not as obvious as the flat knife, but even if the extraction time is prolonged, the taste is still better.

Source: coffee is wet.