The working principle of the mortar spraying machine is to use compressed air to drive abrasive (or projectile) to the surface of the workpiece, the surface of the workpiece for micro cutting or impact, in order to achieve the surface of the workpiece rust, paint, impurities, surface reinforcement and a variety of decoration treatment. Mortar spraying machine is widely used in ship, aircraft, metallurgy, mining, railway, bridge, chemical, vehicle and heavy machinery industry production of various metal components and welding appearance. Sandblasting machine together with non-metal (glass, plastic, etc.) appearance, decoration, carving the ideal equipment.
Mortar spraying machine series products, the steel surface rust level up to Sa3 (before painting steel surface rust level and rust level gb8923-88 in the highest level). At this time, the steel appearance of no visible grease, grime, oxide, rust and paint coating and other attachments, showing uniform metal color. The surface roughness of steel can reach more than Ra40um, and the contact strength with epoxy zinc-rich paint can be greater than 12MPa. The use of mortar spraying machine has greatly improved the contact strength between steel surface and anti-corrosion coatings such as paint, and the anti-corrosion life can be up to more than 20 years.
Mortar spraying machine is applied in shot peening treatment, a large number of projectiles are sprayed to the surface of the parts, the violent impact of the metal parts surface produces a very strong plastic deformation, the surface of the parts to produce a certain thickness of the cold work hardening layer, known as the surface strengthening layer, the strengthening layer will significantly improve the fatigue strength of the parts in high temperature, high humidity operation. In addition, shot peening can also promote the structural change of the steel surface, that is, the residual austenite induced change into martensite, and can refine the substructure of martensite, further improve the hardness and wear resistance of the workpiece surface, and then extend its service life. After practice test, 10 seconds of shot peening, arc height test piece deformation can be up to 0.6mm, cover rate of 100%.
