Difficulty 1：

Differences in fluidity among different carbon species and particle sizes:

The particle morphology, bulk density, and flow angle of coal-based carbon, coconut shell carbon, and impregnated carbon differ from each other. If carbon is poured by weight, it can lead to volume deviations, affecting the thickness of the adsorption layer.

Difficulty 2：

Two carbon injection requirements.

Some high-end gas filter cartridges require a layered filling process, where one type of carbon (such as impregnated carbon) is filled first, followed by another type (such as ordinary activated carbon).

Difficulty 3：

Spillage of carbon dust.

During the carbon filling process using traditional equipment, carbon powder flies around, not only polluting the machine but also adhering to the outer walls of the box, resulting in weak labeling and dirty appearance in subsequent steps.

Difficulty 4：

Rotating table positioning error.

Many manufacturers use a rotary table structure driven by a splitter. Over long-term operation, the mechanical clearance increases, leading to misalignment between the box and the carbon filling nozzle, resulting in carbon leakage and uneven carbon distribution.