Liquid carbon dioxide is controlled by pressure and temperature, and the moment it is ejected through a special nozzle, 1um snowflake crystals are formed.
The snowflake crystals are sprayed onto the surface of the workpiece together with compressed air to clean the contaminants on the surface of the workpiece. The cleaning principle is as follows:
When the snowflake crystals are sprayed onto the surface of the workpiece, they have a shearing effect on the contaminants.
The moment the snowflake crystals are sprayed onto the surface of the workpiece, the contaminants are rapidly cooled and deformed, reducing the adhesion of the contaminants.
The snowflake crystals rapidly vaporize on the surface of the workpiece, resulting in a volume expansion of 600 - 800 times, forming an instant explosion.
Through the combined effects of shearing, cooling, high-speed solid friction, and explosion as described above, the contaminants are separated from the surface of the workpiece. The synchronous compressed air blows away the contaminants that have separated from the workpiece, thus jointly achieving the cleaning effect.
It is particularly suitable for delicate and sensitive materials. Applicable to all materials, complex shapes, and highly automated workpieces, it is non-toxic and environmentally friendly. After cleaning oil and stains, no residue is left behind; no solvents or chemical additives are used. This process eliminates the need for water washing, drying, conveyor lines, and controls, reducing energy consumption and operational costs, aligning with energy-saving and environmental protection goals. The Hetair CO2 snow cleaning machine features a unique nozzle, constant temperature unit, and stable booster pump system, ensuring high conversion efficiency (liquid CO2 to solid snow particles). It provides optimal cleaning results, leaving workpiece surfaces dry without requiring additional heating before painting, thus saving CO2.
Hetair's CO2 snow cleaning system combines a dedicated nozzle, constant-temperature unit and stable booster system to support consistent conversion of liquid CO₂ into snow particles and reliable cleaning performance before subsequent coating processes.
