Coffee Machine Flat Knife Grinding Disc Casting

Product Introduction

The flat knife of the coffee machine is ground by shaving, and the coffee particles are in the form of flakes. The cone knife is ground by grinding, and the coffee particles are in lumps. The conical knife is longitudinally ground, with a longer path, lower speed, less heat generated, better retention of the aroma of coffee powder, and relatively less ground fine powder. The flat knife has a shorter horizontal grinding path and a higher rotational speed, which generates more heat energy and has a greater impact on the flavor of the coffee powder. Parallel grinding is more uniform and the fine powder increases.

Although the coffee grinders on the market have different appearances, according to the difference of the grinding discs of the coffee machine, the coffee grinders can generally be divided into two types: flat blade and cone blade.

Flat knife grinder: It grinds coffee beans into granules in the way of "cutting", so its shape is mainly flake.

Cone knife grinder: It grinds coffee beans into granules by "grinding", so its shape is mainly blocks.

Flat knife grinder workflow

The flat knife grinder is composed of upper and lower cutter discs, and the base is fixed on the motor. When the motor starts, the upper and lower cutter discs rotate to produce cutting action.

As shown in the picture: when the coffee particles fall from the middle, the bottom rotating knife disc will turn the particles to the periphery and then push the part of the red grinding disc for grinding.

The upper and lower cutter heads of the flat knife are placed in parallel, so the particles need to rely on the force of the rotation of the bottom cutter head to push the coffee particles into the cutter head, so the weight of the coffee beans placed above will affect the coffee particles entering the knife The uniformity of the disc (Coffee machine flat knife grinding disc casting), which in turn affects the degree of unevenness in the size of the coffee beans when they are ground.

Secondly, the number of collisions between particles increases due to pushing, which in turn leads to a substantial increase in the proportion of fine powder produced. This is the reason why the uniformity of the particles ground by the flat knife is poor and there are more fine powders.

Therefore, when the coffee powder has many cuts and absorbs water quickly, the concentration of coffee extraction can be increased in a short period of time, making the coffee aroma more obvious.

Cone knife grinder working process

The design of the cone knife grinder is mainly to place a cone-shaped cutter disc at the bottom, and then cooperate with the outer ring cutter disc to grind. As shown in the figure: after the coffee beans fall from the top, they will be pulled down with the rotation of the conical cutter head, and then the rolling action will occur. Because the relationship is from top to bottom, the particles can be separated without relying on the Push of the coffee grains out.

Compared with a flat knife grinder, the number of collisions between the particles will be much less. In this way, the proportion of fine powder will be relatively reduced, and the uniformity of particles will be greatly improved.

The disadvantage of the cone knife is that the path of water absorption becomes relatively longer, so the coffee particles need to be soaked in water for a longer time to extract more soluble substances.

Detection Systems

Copper Silica Sol Investment Casting