The high-pressure water generated by the high-pressure water jet generator is ejected from the sandblasting head through the high-pressure pipeline, and a negative pressure is generated in the sandblasting chamber. The sand moves toward the sandblasting chamber due to the pressure difference and mixes with the high-pressure water in the sandblasting chamber, thereby accelerating the movement and being ejected quickly, hitting the metal surface and producing a certain cutting and grinding effect on the metal surface, so that the non-main dirt, grease, rust, oxide scale, etc. on the metal surface are instantly peeled off, thereby revealing the metallic luster of the metal surface and achieving the desired surface effect.
