In the production process of the foundry industry, the cleaning of molds and castings is a crucial step. Traditional cleaning methods, such as chemical cleaning and high-pressure water rinsing, have been widely used, but their drawbacks are becoming increasingly prominent. Chemical cleaning requires the use of a large amount of chemical reagents, which not only incurs high costs but also causes serious pollution to the environment. The subsequent wastewater treatment also causes headaches for enterprises; High pressure water flushing can easily cause mold rusting and deformation, affecting the accuracy and service life of the mold, and the cleaning efficiency is low, making it difficult to meet the needs of large-scale production.
The emergence of dry ice cleaning technology has brought a new dawn to the foundry industry. Its working principle is based on the unique physical properties of dry ice, which is solid carbon dioxide with a temperature as low as -78.5 ℃. During the dry ice cleaning process, dry ice particles are driven by compressed air and sprayed at high speed onto the surface of the object being cleaned. The low temperature of dry ice particles can cause dirt to rapidly freeze and become brittle. At the same time, dry ice particles instantly sublime, rapidly expanding in volume by about 800 times, generating strong peeling force to thoroughly remove dirt from the surface of the object.
