Dry Ice

Dry ice: the new cleaning standard in industry
Oils, grease, silicon – contaminants which occur on machinery, turbines or other components in an industrial environment must be removed at regular intervals. Because thorough cleaning reduces wear and improves quality. In addition, clean machines, tools or other parts have a positive effect on the success of a company: consistently high productivity, with safe production processes and less frequent breakdowns for the machinery.
The difficulty: choosing the right cleaning agent. Because conventional, generally chemical agents are rarely able to handle all contaminants in an industrial environment.
This challenge can be met with dry ice. A special property makes the ice particles particularly invaluable for cleaning in an industrial environment: at a temperature of -78.5 °C, dry ice transforms directly into a gaseous state – entirely without melting! At the same time, it expands dramatically. When the dry ice hits the object to be cleaned, it simply blows the accumulated dirt away, so to speak. 

What is dry ice?
Dry ice comes from liquid carbon dioxide (carbonic acid, CO2), a non-flammable, odorless natural gas. This can be found in large quantities in volcanoes, chasms and springs, as well as in plant, animal and human metabolism. Dry ice has a constant temperature of -78.5 °C and does not contain any water.

How is dry ice made?
In a physical process in which carbon dioxide is allowed to expand in a pelletizer under atmospheric pressure, resulting in dry ice or dry ice snow. This is pressed through the extruder plate in the pelletizer. The result is hard dry ice pellets which can then be poured into a dry ice blasting unit.
With the COOLMASTER, the latest in dry ice blasting units, you too can remove all types of soiling with the help of dry ice – and set new cleaning standards in the company. Boundless - whether in the plastics, food or automotive industry.
In addition, you benefit from many other advantages of dry ice cleaning. For example, the enormous time saving: When cleaning with dry ice, in contrast to compressed air blasting with sand, no used blasting materials which then require complex disposal are left behind. The dirt carefully removed with the COOLMASTER can simply be swept or vacuumed up. You also save time since the dry ice blasting unit can be used for cleaning during ongoing operation, meaning that laborious cleaning processes over the weekend or in the night are a thing of the past.
Furthermore, dry ice cleaning is extremely environmentally friendly. Since the soiling is removed without water or chemical agents, the environment is protected and employees are not faced with complex disposal processes.
A particular highlight: no surfaces are damaged by cleaning with dry ice; and with the COOLMASTER, you can remove contaminants even from the surfaces with a wide range of textures and degrees of sensitivity without a problem.
The benefits of dry ice cleaning at a glance:
  • Machine downtimes are reduces and time is saved since cleaning can be carried out during ongoing operation.
  • Dry ice cleaning is entirely environmentally friendly since neither chemicals not water are required.
  • In contrast to chemical cleaning, no toxic blasting agent residues are generated.
  • These is no damage to the surface.
How does dry ice cleaning work?
The starting point for cleaning with dry ice is a dry ice blasting unit, such as the COOLMASTER, and dry ice pellets. The pellets are used as blasting media in the procedure and are accelerated to extremely high speeds by the jet of compressed air. The unit then applies this to the object to be cleaned via a gun and nozzle.
This process results in three effects which, in combination, allow for an optimal cleaning process:
for the first effect, the kinetic effect, the dry ice pellets are accelerated to supersonic speeds. The blasting agent then hits at -78.5 °C, triggering the thermal effect:  the blasting agent cools the layer of dirt abruptly, contracts and forms cracks. The different coefficients of thermal expansion then cause the bonds between the surface and the soiling to dissolve. In the final step, the physical state of the dry ice pellets changes in that the carbon dioxide transforms directly from a solid to a gaseous state upon impact. Of particular importance for dry ice cleaning: the CO2 instantaneously expands to 700 times the volume within a split second. This expansion blasts the contamination off the surface entirely. In the final stages, the dirt particles resulting from cleaning can simply be disposed of.
The process at a glance:

The following are required for dry ice cleaning: