...... ....
2. Surface pretreatment before painting
Before painting and coating; before spraying; before metal spraying; before zinc, chromium and nickel; before oxidizing; before testing ......
3. Change the mechanical properties of the workpiece Surface roughness increase or decrease; change the surface tensile stress to compressive stress; enhance the surface lubrication; reduce the noise of the part motion coupling; improve the surface friction coefficient ......
4. Workpiece surface finishing process
Polishing metal surfaces for decoration; obtaining matte or diffuse reflective surfaces; polishing wood surfaces...
5. Cleaning and preservation of parchment and other works of art
6. Cleaning of contactors and wiring process surfaces such as brushes to improve electrical performance

Advantages of sandblasting machine
1. the base of the metal parts of the sandblasting machine is not damaged, the dimensional accuracy will not change;
2. the surface of the part is not contaminated, the abrasive material will not have a chemical reaction with the part;
3. 3. sandblasting machine can easily deal with grooves, concave surfaces and other difficult to access parts, a variety of abrasive grain size can be selected for use;
4. drastically reduce processing costs, mainly in improving the working efficiency of the sandblasting machine, to meet the requirements of a wide range of surface finishing;
5. low energy consumption, cost savings;
6. sand blasting machine does not pollute the environment, eliminating the cost of environmental management;

How to filter sand blasting machine?
1. Depends on the size of the workpiece, select the box blasting machine, move the blasting machine, and automatic sandblasting machine;
2. Depends on the shape of products, select the blast machine specifications, generally have a fixed one meter below the specifications, particularly large order or choose to open.
3. On the surface of the product requirements of the degree depends on the concrete is dry or wet spray spray spray if it is dry, then the choice of a lot of abrasive, wet spray is generally glass sand.
4. Sandblasting machine to be familiar with some parts, sand blasting gun and blasting gloves often want to change things, because in fact, wear a very powerful blast.
Sandblasting machine fault analysis
Blasting machine is a common casting machinery and equipment, along with the extensive application of sandblasting machine, sandblasting machine failures plagued some of the operators, if not timely troubleshooting, will lead to sand blasting machine unusable. Here we take a look at the common blasting machine failure.
(1) sand blasting machine breakdown phenomenon: no air, no abrasive
Possible reasons: 

1. Compressed air is not open
   2. Relief valve set pressure is too low
   3. Foot switch is not adjusted or damage
   4. Sandblasting or abrasive valve plug
   5. Safety gas cut off
   6. Sandblasting machine is broken the main regulator
   7. Controlled by adjusting the pressure valve is broken
   Remedy:
   1. Open air
   2. The pressure to 0.5MPa or more
   3. Adjust or replace foot switch
   4. Abrasive cleaning nozzles or valves or reload
   5. Check the safety valve gas on the road
   6. Check the main regulator blasting machine
   7. Check the blasting machine control valve
   (2) sandblasting machine breakdown phenomenon: the good material into the vacuum bags of sand
   Possible reasons:
   1. New vacuum bags larger gap
   2. Sand material too thin
   Remedy: 1. Generally cleared after 8 hours
   2. Adopt a more coarse material
   (3) sandblasting machine failure phenomenon: the loss of sand material
   Possible causes: dust bag has holes or clamp
   Remedy: Replace vacuum bags, vacuum bags to re-clamping
   (4) sand blasting machine breakdown phenomenon: the blast is unclear when the line of sight
   Possible reasons:
   1. Vacuum bags clogging
   2. Vacuum bags blocked aging
   3. Sand compound with too much dust
   4. Compressed air pressure is too high
   Remedy: 1. Shaking sand blasting machine vacuum bags
   2. Replace vacuum bags blasting machine
   3. Replace sand material
   4. To reduce the pressure recommended by sand blasting machine
   adjustments to the "flame adjustment", to generate a satisfactory flame