What is sandblasting treatment

Sandblasting treatment uses compressed air as the power to form a high-speed jet beam, which sprays abrasives (such as steel sand, brown corundum, glass beads, diamond sand, etc.) to the surface of the workpiece to be treated at high speed, causing changes in the appearance of the outer surface of the workpiece. Due to the impact and cutting effects of the sand on the workpiece surface, the workpiece surface obtains a certain degree of cleanliness and different roughness, and the mechanical properties of the workpiece surface are improved, Therefore, it improves the fatigue resistance of the workpiece, increases the adhesion between it and the coating, prolongs the durability of the coating film, and is also conducive to the leveling and decoration of the coating.
Sand blasting is to use compressed air as the power to form a high-speed jet beam to spray the abrasive to the surface of the workpiece to be treated at a high speed, so that the surface of the external surface of the workpiece will undergo Physical change and meet the quality requirements.
Scope of application of sandblasting machine:
1. Clean the surface of metal and non-metallic workpieces, and remove the oxide skin, residual salt, residual oil, etc. after heat treatment;
2. Clean the oxide skin, molding sand, etc. of black (colored) castings;
3. Clean the oxide skin, molding sand, etc. of precision castings without allowance for machining;
4. Clean up residues, micro burrs, etc. from machined parts;
5. Clean the oxide skin, welding slag, etc. of the welded parts;
6. Clean the oxide skin, rust layer, etc. of cold and hot rolled steel plates (profiles);
7. Clean the release agents, deposits, etc. from various mold cavities;
8. Clean the sintering residue on the surface of ceramic components;
9. Clean the flash of plastic molded parts;
10. Clean Radioactive element on the surface of objects;
11. Clean up surface residues on bridges, hydropower station gates, ships, and buildings;
12. Clean the rubber adhesive layer of the airport runway;
13. Clean the rust layer and old paint layer on cars and train carriages;
14. Clean various pipelines and containers;
15. Clean up oil stains, attachments, etc. from old machine parts;
16. Clean the residual paint, rust layer, and attachments of the container;
17. Clean the incorrect sintered layer on the porcelain;
18. Clean the scratches and other surface pre-treatment of the decorative surface of the workpiece;
19. Clean the surface of various workpieces to produce appropriate roughness and rough surface before painting or baking; Before spray molding; Before metal spraying; Before galvanizing, chromium, and nickel; Sandblasting before oxidation treatment;
20. Change the physical and mechanical properties of the workpiece before testing to improve or reduce surface roughness;
21. Change the surface tensile stress to compressive stress;
22. Improve the lubrication status of the surface;
23. Reduce the motion noise of the coupling;
24. Improve the friction coefficient of the surface, polish the surface of the workpiece, and polish the metal outer decorative surface;
25. Obtain a matte or diffuse reflective surface;
26. Cleaning and preservation of polished parchment paper and other artworks on the surface of wooden products. Cleaning the surface of brushes, contactors, and wiring techniques;
27. Comparison of improving conductivity with other pre-treatment processes (acid washing, tool cleaning).
Characteristics of sandblasting:
1) Sandblasting is the most thorough, versatile, rapid, and efficient cleaning method.
2) Sandblasting treatment can be arbitrarily selected between different roughness levels, which cannot be achieved by other processes. Manual polishing can create rough surfaces but the speed is too slow, while chemical solvent cleaning can cause the surface to be too smooth, which is not conducive to coating adhesion.
The function of sandblasting:
Surface cleaning, surface strengthening, and surface beautification of metal and non-metal workpieces;
1. Surface pre-treatment processing: electroplating, painting, Teflon, PU, rubber plastic coating, metal spray welding, titanium plating, and other pre-treatments to increase surface adhesion;
2. Surface beautification processing: decoration processing of various metal products, extinction and soft fog surface treatment of electroplating products, as well as surface atomization treatment of non-metallic products such as acrylic, acrylic, crystal glass, etc;
3. Surface cleaning processing: removal of metal oxide layer or black skin after heat treatment, surface pores, metal or non-metallic surface rust, removal of black and colored spots on ceramic surfaces or regeneration of colored drawings, removal of oxides, residues, or release agents from rubber molds and gravity die-casting molds;
4. Surface hair removal processing: hair removal for plastics, bakelite products, zinc aluminum die-casting products, and surface finishing treatment for electronic or other parts;
5. Electronic parts processing: removal of surface impurities after diffusion of silicon chips, etching of silicon chips by sandblasting and cutting into small circular grains, removal of overflow and burrs in the electronic parts packaging industry, removal of surface printing on electronic parts, and cleaning of ceramic electric heating materials;
6. Surface etching: surface modification and etching of precious metal jewelry, gems, glass, stone, stone seals, ceramics, wood, etc;
7. Workpiece stress relief processing: cleaning and stress relief of aerospace industry parts, or refurbishment, polishing, rust removal, and paint removal of national defense weapons;
8. Mold processing: Pear ground processing (sandblasting) of the mold surface, mold bite and mist treatment, increasing the adhesion of the mold coating, shoe mold, conductive rubber mold, tire mold, and electronic product mold cleaning and mist treatment.