First, the wide application of pressure blasting machine:
The pressure type sand blasting machine uses compressed air as the power to form a high-speed jet beam, and sprays the blasting materials (copper ore, quartz sand, iron sand, sea sand, corundum, etc.) on the surface of the workpiece to be treated at high speed, so that the appearance of the outer surface of the workpiece Changes occur, due to the impact and cutting effect of the abrasive on the workpiece surface, the workpiece surface obtains a certain degree of cleanliness and different roughness, and the mechanical properties of the workpiece surface are improved, thus increasing the fatigue of the workpiece, increasing it and The adhesion between the coatings prolongs the durability of the coating film, which is also beneficial to the leveling and decoration of the coating. There is another type of pressure blasting machine which is also an open type blasting machine but not high pressure. There is no pressure in the blasting tank. It is based on the principle of negative pressure. It is the same as the box type blasting machines. This type of open sand blasting machine only needs one cubic meter of air consumption per minute, but its efficiency is not high, and it can only spray about 5-6 square meters per hour. Since this machine is pressureless, no pressure vessel certificate is required. Pressure sand blasting machines generally use dual-inlet tungsten steel blast guns. Now with boron carbide dual-inlet blast guns, the service life is longer, but they cannot be bumped and easily broken because of high hardness and good wear resistance. At present, most of them use dual-inlet tungsten steel spray guns. The nozzles are divided into M6, M8, M10, M12 and other types, and the air consumption of each species is different. For example, the M6 nozzle is basically more than 2 squares, and the M8 nozzle is sufficient. It takes 4 squares per minute of gas, and the air compressor screw type of 4 square meters per minute is about 40,000 yuan, and the piston type is about 16,000 yuan. The price is much higher than the sand blasting machine. Be sure to pay attention when buying. Many users buy Because the open type sand blasting machine cannot be used because the air compressor cannot be brought up, the air compressor must be purchased again.
Second, the main characteristics of pressure blasting machine processing
(1) Workability of Pressure Sandblasting Machine
Sandblasting is different from friction processing such as abrasive cloth and vermiculite. The processed abrasive particles are processed directly against the surface of the object. When the surface of the processed object has a high level, as long as the particles can fly, the processing can be performed. Since it is not abrasion processing, although it can improve the surface roughness, it has no smoothing and mirror effect. These characteristics are easily overlooked.
(2) Accumulation processing method of small force
Because the volume of abrasive particles is very small, the impact energy of each particle is very small. Therefore, without destructive impact on the workpiece, processing is performed by numerous abrasive particles without damage. The tiny processing energy of each abrasive particle is accumulated in a large amount in a short time, and as a result, a large amount of work is completed. This situation is similar to the scene of a large group of ants eating huge food in a short time.
(3) Diversity of effects of pressure blasting machine
The impact effect of blasting abrasive processing is extremely diverse. Due to the nature of the abrasive used, the blasting and projection angles, speeds, densities, distances, and time, etc., the effects have various changes, and the variety of the degree of processing is easy to adjust is the most significant feature of blasting.