Characteristics of sand blasting process in sand blasting and shot blasting in Dalian

Sand blasting process can be divided into pneumatic spray gun and impeller shot blasting. The advantage of sand blasting process is that it can remove the peak and remove the burrs after die casting, stamping, flame cutting and forging. It has better effect on thinner workpieces and burrs with pores. It can clean the residual sand particles in the sand casting process, clean the rust stains of cast iron or steel, and clean the deoxidized skin after thermal processes such as heat treatment, burning, hot forging and rolling. In addition, in the application of coating, it can remove the existing coating or protective layer, cover the defects on the casting, such as cracking or cold lines, and provide a glossy surface.

The melting point of the spraying material is below 750 ℃, and the high-speed gun is selected; Medium speed gun shall be selected when the melting point is above 750 ℃. Sandblasting machine is a kind of mechanical equipment that can use various abrasives (silica sand, copper ore, iron sand, etc.) to spray to the metal surface with the help of air pressure. The sprayed abrasive will impact grind the metal surface, remove the impurities and oxide layer on the workpiece surface, increase the surface area of the workpiece, improve the adhesion of the coating, and reduce the residual stress on the substrate surface. New abrasive valve is adopted to solve abrasive blockage and facilitate maintenance. High abrasion resistant sand blasting hose, durable. Cemented carbide nozzle can prolong the service life of sand blasting and greatly improve the efficiency of sand blasting.

Characteristics of sand blasting process in sand blasting and shot blasting in Dalian

1、 Sand blasting is a thorough, universal, rapid and efficient cleaning method.

2、 Sand blasting can be selected arbitrarily between different roughness, which can not be achieved by other processes. Manual grinding can make rough surface, but the speed is too slow. Chemical solvent cleaning is too smooth, which is not conducive to coating bonding.

Both shot blasting and sand blasting use high-pressure air or compressed air as power to blow it out at high speed and impact the workpiece surface to achieve cleaning effect, but the effect is also different due to different media. After sand blasting, the dirt on the surface of the workpiece is removed and the surface area is greatly increased, which increases the bonding strength between the workpiece and the coating / coating.

Sand blasting is used for workpieces with complex shapes, which is easy to remove rust by hand, with low efficiency, poor site environment and uneven rust removal. General sandblasting machines have sandblasting guns of various specifications. As long as it is not a particularly small box, you can put the gun in and clean it. The supporting product of pressure vessel - head adopts sand blasting to remove the oxide skin on the workpiece surface, and the diameter of quartz sand is 1.5mm ~ 3.5mm.