Blast processing is a surface treatment and finishing method in which abrasive particles—referred to as blasting media—are propelled onto the surface of a workpiece. Through this impact, operations such as cutting, cleaning, polishing, and surface modification can be performed.

Blast processing includes several types of technologies, such as:

• Air Blast (Sand Blast)

• Shot Blast

• Wet Blast

• Dry Ice Blast

Blast processing is widely used in industries such as automotive manufacturing, shipbuilding, aerospace, and electronics. Its applications are diverse and include surface preparation, matte finishing, deburring, shot peening, and mold polishing.

◆ Characteristics and Advantages of Blast Processing
   What kind of processing method is it?

• Blast processing is a physical processing method that changes the surface structure of a product by propelling abrasive media at high speed onto the surface.
• Unlike chemical treatments such as etching, electropolishing, or acid pickling, blast processing does not rely on chemical reactions and therefore does not impose excessive hazards on operators.
  

High-Speed Camera Observation

◆ What kind of surface does it produce?

Uniform Non-Directional Surface.
During blasting, countless abrasive particles are propelled by air and randomly collide with the surface, forming a uniform surface texture without directional patterns.
This type of surface can provide various functional benefits, including improved durability, enhanced adhesion, and better sliding or friction characteristics.

◆ What materials can it be applied to?

Applicable to Various Materials

By selecting appropriate blasting media—considering material type, shape, and particle size—blast processing can be applied to a wide variety of materials such as metals, ceramics, glass, and plastics.

Among various surface processing technologies, blast processing has fewer limitations regarding the material, shape, or size of workpieces compared with other methods such as machining, etching, chemical conversion treatment, or coating. This flexibility allows it to be applied to a wide range of products.
Replacing conventional processes with blast processing can improve productivity and product quality, helping many manufacturers resolve challenges in their production processes.

For surface coating processes such as plating, painting, or coating, blast processing can create an optimal base surface that significantly improves adhesion. Therefore, it is often used not only as a standalone process but also as a pre-treatment or base preparation step to achieve better overall results.

The industrial origin of blast processing dates back to 1870 in Philadelphia, USA. Benjamin Chew Tilghman was inspired by the phenomenon of desert sand being blown against window glass and causing abrasion. He patented this concept and named the process the “Sandblast Method.”.

With the development of synthetic abrasives, modern sandblasting has evolved beyond the use of natural sand. Today, various blasting media are used, including metal, resin, and ceramic abrasives.

As a result, this technology is also referred to as Air Blast or Abrasive Blasting. Depending on the shape of the blasting media used, it may also be called Bead Blasting or Grit Blasting.

Power Micro International Company offers comprehensive surface-engineering and anti-adhesion solutions to eliminate soldering/erosion defects and enhance productivity.

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