Casting Cleaning

Removing burrs and flash: Shot blasting machines can efficiently remove burrs, gate residues, and parting line flash from the surface of castings.

Stripping oxide scale and adherent sand: Oxide scale and adherent sand form on the surface of castings after high-temperature cooling, and shot blasting can quickly strip off these impurities.

Inner cavity cleaning: For castings with complex structures (such as valve bodies, cylinder blocks), shot blasting can clean internal holes and cavities through directional shot peening.

Pretreatment

Pre-coating treatment: The rough surface after shot blasting can enhance coating adhesion, providing a good base for subsequent processes such as painting and electroplating.

Preparation before flaw detection: Remove surface impurities to ensure the accuracy of ultrasonic, magnetic particle flaw detection and other inspections.

Surface Strengthening

Improving fatigue strength: Shot blasting creates a compressive stress layer on the surface of castings, reducing stress concentration and extending service life (e.g., gears, crankshafts).

Enhancing surface finish: Uniform projectile impact can reduce surface roughness, achieving a Ra value of 0.8-3.2μm.

Dimensional Correction

For some castings (such as aluminum alloy die castings), shot blasting can slightly correct surface dimensional deviations, reducing the amount of machining.