PROCESSING SERVICES
What is sandblasting?
Sand blasting is the use of compressed air, centrifugal force and sand blasting materials to spray on the surface of the material at high speed, impact the object, and grind the surface of the object. This is not only to remove contaminants remaining on the surface of the object, but also to process the surface aesthetically . According to the operating conditions and the type of sandblasting material, it is suitable for the surface treatment process of various industrial groups.
Understanding what kind of blasting materials to use for equipment or parts is an important process. The working conditions before adoption, that is the selection of pressure and blasting materials, should be cautious. Different sandblasting materials have different treatment results due to the difference in hardness, shape and density. Therefore, before the project is implemented, it is necessary to carry out multiple sample operations to determine.
Sand blasting is usually a course called "low technology" for sand blasting operations. But now as the effectiveness of sandblasting is verified, it is being widely used.
Summary of the effect of sandblasting
-Remove tool marks and foreign objects on the surface
-Remove oxide layer and decarburization layer.
-Make the surface squeeze residual stress.
-Work hardening occurs on the surface.
-Suitable for pre-treatment of seals, coatings, etc.
-Remove burrs after processing
Glass bead blasting
Finishing of equipment and accessories for various industrial groups. The finished surface not only presents a high-grade mild luster, but also provides enhanced functional advantages for coating and mild Peening applications.
A glass bead is a spherical ball of uniform size and hardness made of chemically inactive soda lime glass. Its impact does not cause pollution and dimensional changes, but removes foreign objects from the surface. Widely used applications include cleaning, surface wear, decontamination, mild peening, etc. The glass bead process is one of the most versatile glass blasting materials
Sandblasting of stainless steel beads
It is used in many applications where ordinary iron pollution must be avoided. Suitable for semiconductor, display, medical, food and other directions that require high cleanliness. However, due to the weight and density, depending on the state of the object, compression pressure may be induced.
Stainless steel bead blasting is a spherical projection material made of stainless steel. Compared with other sand materials, it is more efficient and has a longer service life ... Also, the heavy particles of stainless steel beads can affect the object and transfer a large amount of energy, thereby obtaining a very effective cleaning and shock absorption effect.
Comparison of roughness before and after sandblasting
When choosing a blasting material, the material is important, but the particle size of the sand used is also important. The following table is a reference to the data of an organization's observation experiments before and after sandblasting. It can be seen that the surface changes caused by the particle size.
Comparison experiment of roughness before and after sandblasting |
||||
Particle size |
Measurement times |
Before Ra (μm) |
After Ra (μm) |
Experimental benchmark |
#50 |
1 |
0.24 |
1.45 |
Sandblasting material : GBB Air pressure : 3.9×105Pa(4kgf/cm2) Test block : Stainless steel polishing plate |
2 |
0.51 |
1.09 |
||
3 |
0.25 |
1.83 |
||
Average |
0.33 |
1.45 |
||
#100 |
1 |
0.17 |
0.76 |
|
2 |
0.45 |
0.91 |
||
3 |
0.55 |
0.61 |
||
Average |
0.39 |
0.76 |
||
#200 |
1 |
0.17 |
0.43 |
|
2 |
0.35 |
0.36 |
||
3 |
0.39 |
0.42 |
||
Average |
0.30 |
0.40 |
||
#350 |
1 |
0.18 |
0.22 |
|
2 |
0.23 |
0.31 |
||
3 |
0.54 |
0.18 |
||
Average |
0.31 |
0.23 |
||
Influence of sandblasting material shape on wood
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