Sand blasting is considered to be a kind of skin texture in the strict sense, and it is divided into two kinds of bumps. Sand blasting of the hand mold also uses compressed air as the power to form a high-speed jet beam to spray the blasting material (copper ore, quartz sand, corundum, iron sand, sea sand) on the surface of the part to be processed at high speed, so that the appearance or shape of the part surface occurs. Variety. Due to the impact and cutting action of the abrasive on the surface of the part, the surface of the part has a certain degree of cleanliness and different roughness, and the mechanical properties of the surface of the part are improved. Therefore, the fatigue resistance of the part is increased, and The adhesion between it and the coating prolongs the durability of the coating film, which is also conducive to the leveling and decoration of the coating.

According to the different sandblasting methods, the following four classification methods are relatively speaking:

1.Press-in blasting and suction blasting

2.Dry blasting and liquid blasting

3. Open blasting and box (room) blasting

4. Manual blasting and automatic blasting

Application of prototype blasting

1. Sand blasting can remove rust and other dirt on the surface of the part of the plate, and establish a very important basic pattern on the surface of the part (the so-called matte surface), and it can be achieved by changing the abrasive with different particle sizes. The degree of roughness, the part needs to be sandblasted before plating and bonding. It greatly improves the binding force of the prototype part with the coating and plating material. Or make the adhesive bond more firm and better quality.

2. Cleaning and polishing of the rough surface of castings and forgings and part after heat treatment can clean all dirt (such as oxide scale, oil stains and other residues) on the surface of castings and forgings and part after heat treatment, and polish the part surface to improve the finish of the part. To achieve the role of landscaping.

3, burr cleaning and surface beautification of machined parts can clean the tiny burr on the surface of the part, and make the surface of the part more flat, eliminate the harm of burr, and improve the grade of the part.

4. Improving the mechanical properties of parts After sandblasting, mechanical parts can produce uniform and fine uneven surfaces on the surface of the parts, so that the lubricating oil is stored, thereby improving the lubrication conditions, reducing noise and increasing the service life of the machine.

5, light decoration effect for some special-purpose parts, sandblasting can achieve different reflections or matt.