How to choose a bean grinder? Classification and Analysis of Bean Mill

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How much effort must be spent on a strong cup of coffee, from harvesting, processing, roasting … All items need to wait patiently, and the results need to be grinded. As the saying goes, if you want to do good work, you must first sharpen its tools. The bean grinder for grinding coffee is also a subject of knowledge.

The roasted coffee beans can not be directly brewed, and the coffee beans need to be ground into powder in order to brew coffee, and the bean grinder plays an important role in this process, so it has become one of the utensils that must be prepared before making coffee.

The bean grinder is generally divided into manual type and electric type, but according to the blade of the bean grinder, it can be divided into three types, which are introduced as follows:

1. Propeller type:

Blade: the blade is shaped like a helicopter propeller, also known as "blade shredding".

Principle: use the continuous chopping method to cut up the coffee beans, and the number of times the blade repeatedly chopped the beans determines the thickness of the coffee powder.

Advantages:

The price is lower

Easy to use

High mobility

Disadvantages:

It is not easy to master the grinding degree and quality.

Poor uniformity of coffee powder

Not suitable for mass grinding

The easy passivation of the blade affects the grinding efficiency

High-speed grinding destroys the aroma of coffee beans

Easy to hurt your hand

Second, cutting sharpening knife:

Blade: a combination of two vertical sharpening knives mounted on a cylindrical rotary shaft, also known as "gear cutting".

Principle: using the cutting principle, after the machine starts, when the coffee beans pass through the grinding cutter plate, they are quickly cut and chopped into powder, while the distance between the grinding cutter plate determines the thickness of the coffee powder. The closer the distance is, the finer the powder is and the wider the distance is. The thicker the powder is.

Advantages:

Easy to adjust grinding thickness

Good grinding uniformity

Can quickly grind a large number of coffee beans

It is not easy to produce friction heat.

Disadvantages:

It is easy to produce fine powder

Need to be cleaned carefully after each grinding

Third, grinding type sawtooth knife: can be subdivided into "plane type" and "three-dimensional type", also known as "cone knife rolling type"

Flat blade: consists of two annular blades with grooves

Plane principle: using the principle of rolling and grinding, when the power is turned on, the coffee beans are crushed into fine powder by two blades at a very fast speed.

Three-dimensional blade: composed of two concave and convex interlaced conical iron on the surface.

Three-dimensional principle: using the principle of rolling and grinding, coffee beans are rolled and ground in two conical irons. the distance between conical iron determines the thickness of coffee powder. the closer the distance between conical iron is, the finer the powder is; on the contrary, the thicker the powder is. Usually the hand-operated bean grinder uses a three-dimensional cone knife.

Advantages:

The blade price is lower.

Better grinding uniformity

It is not easy to produce high temperature

It is not easy to affect the quality of coffee

Disadvantages:

The grinding efficiency is slow.

Not suitable for mass grinding