Introduction to sandblasting machine

The ideal working condition requires sand particles to present a uniform suspended flow state in the pipeline. The appropriate amount of sand, as well as the appropriate air volume and pressure, are the most critical factors determining the flow effect of sand particles. The size of the air volume should ensure that the flow velocity of the air in the pipeline is at least greater than the settling velocity of the maximum sand particle. The wind pressure is sufficient to overcome the friction loss and resistance of air pushing sand particles to flow in the pipeline, so as to ensure the smooth flow of sand particles in the pipeline.

However, as the pipeline grows, the wind pressure gradually decreases, the airflow velocity decreases, and the suspended particles first exhibit non-uniform suspended flow, leading to an uneven flow state of density. When the airflow velocity is less than a certain value, a pulsating flow state occurs. As the airflow speed further decreases, some material particles will stagnate at the bottom of the pipeline, while another part will slide forward, causing unstable movement of the stagnant material layer and ultimately forming blockages, leading to work failure. This is something that should be avoided during the sandblasting process.

The sandblasting machine, due to the impact and cutting effects of abrasives on the surface of the workpiece, obtains a certain degree of cleanliness and different roughness, improving the mechanical properties of the workpiece surface. Therefore, it improves the fatigue resistance of the workpiece, increases its adhesion to the coating, prolongs the durability of the coating, and is also conducive to the leveling and decoration of the coating. It removes impurities, impurities, and oxide layers from the surface, while roughening the surface of the medium, eliminating residual stress on the workpiece, and improving the surface hardness of the substrate.