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Wet sand blasting machines offer a unique approach to surface treatment, combining the abrasive action of sand or other media with water to create a more environmentally friendly and dust controlled blasting process. This technology has gained popularity in various industries, especially in applications where minimizing dust emissions and reducing the risk of surface damage are crucial.
The working principle of a wet sand blasting machine involves mixing abrasive material with water in a specially designed chamber or mixing system. The resulting slurry is then propelled onto the surface to be treated through a nozzle, either by compressed air or a pump driven system. The presence of water serves multiple purposes. Firstly, it significantly reduces dust generation during the blasting process. In traditional dry sand blasting, fine particles of abrasive and removed material can become airborne, creating a hazardous and messy working environment. In contrast, the water in wet sand blasting traps these particles, keeping the dust levels to a minimum and improving air quality for operators.
Secondly, the water acts as a lubricant, reducing the friction between the abrasive particles and the surface. This helps to prevent excessive scratching or damage to the substrate, making wet sand blasting suitable for more delicate materials such as aluminum, stainless steel, and certain types of wood. For example, in the automotive industry, wet sand blasting is used to clean and prepare car body panels before painting. It can effectively remove old paint and contaminants without causing pitting or other surface imperfections that could affect the quality of the new paint job.
Wet sand blasting machines also come with features like water filtration and recycling systems. These systems allow the used water abrasive mixture to be collected, filtered to remove contaminants, and then reused, reducing water consumption and waste disposal costs. However, compared to dry sand blasting, wet sand blasting may have slightly lower cleaning efficiency in some cases, and the treated surfaces require additional drying time before further processing. Nevertheless, its environmental and surface protection advantages make it a valuable option in many industries.