What is the stone sandblasting treatment?
Sandblasting treatment of natural stone (sandblasting surface of the stone) is a kind of stone surface processing similar to glass sand grinding effect obtained by using abrasives such as diamond, quartz sand, and river sand with edges and corners to impact the stone surface under the drive of compressed air (or water).
The application range of stone sandblasting treatment is very wide. It can not only be used for the processing of natural stone products such as thin plates and specification boards but also for the processing of irregular stones such as lines, columns, railings, steps, corners, etc. Moreover, sandblasting treatment is also widely used in stone carving.
At the same time, stone sandblasting processing, like other processing methods, can perform small-scale sandblasting processing and large-scale sandblasting processing.
Of course, stone sandblasting treatment is not only used for surface processing as a decorative surface but also for stone repair. For some installed stones, if there are serious irreparable stone lesions or stone pollution, we can use surface sandblasting treatment to deal with stone lesions and pollution issues.
The process of stone sandblasting treatment:
The process of stone sandblasting is very simple. If it is a full area sandblasting, only the rough ground and leveled stone slab need to be sandblasted directly; If it is local sandblasting, the parts that do not require sandblasting treatment must be wrapped with rubber sheets or other sandblasting protective films before spraying.
There are currently two main methods for stone sandblasting, one is manual sandblasting, and the other is machine sandblasting.
The manual sandblasting method is usually a dry sandblasting machine, while the machine sandblasting method has two types: dry sandblasting machine and liquid sandblasting machine,
Dry sandblasting machines can also be divided into suction type and pressure type.
1. Suction-type dry sandblasting machine
The suction-type dry sandblasting machine is powered by compressed air and forms a negative pressure inside the spray gun through the high-speed movement of the airflow. The abrasive is sucked into the spray gun through the sand-conveying pipe and shot out through the nozzle, sprayed onto the processed surface to achieve the expected processing goal. In equipment such as pressure-type dry sandblasting machines, compressed air not only supplies material power but also provides power, which is acceleration power.
2. Press-in dry sandblasting machine
The press in the dry sandblasting machine is powered by compressed air. The working pressure established by compressed air in the pressure tank is used to press the abrasive into the sand-conveying pipe through the sand outlet valve and shoot it out through the nozzle, spraying it onto the processed surface to achieve the expected processing goal. In a press-type dry sandblasting machine, compressed air provides both material supply power and acceleration power.
3. Liquid sandblasting machine
Compared to dry sandblasting machines, the biggest feature of liquid sandblasting machines is that they effectively control dust pollution during sandblasting processing and improve the working environment of sandblasting operations. The principle of a liquid sandblasting machine is to use a grinding fluid pump as the feed power for the grinding fluid, and transport the evenly stirred mixture to the spray gun through the grinding fluid pump (a mixture of abrasive and water) is transported to the spray gun.
Compressed air, as the acceleration power of the grinding fluid, enters the spray gun through the gas pipeline. Inside the spray gun, compressed air accelerates the grinding fluid entering the spray gun and is sprayed out through the nozzle to achieve the expected processing purpose on the processed surface.
Innovative processing of stone sandblasting treatment
Due to the high emphasis placed by various stone companies on the development of new products and processing techniques, new stone surface processing methods are emerging one after another, and they also attach great importance to the expansion and extension of the original processing surface. For example, stone sandblasting, river sand, sea sand, quartz sand, carborundum, etc. were used as abrasives, and later some other materials were used as abrasives, all of which have different surface effects.
Especially, some factories use steel balls as abrasives to impact the surface of stone, which has a special effect, similar to the effect of lychee processing (there were pictures originally, but I don’t know where to find them, so I didn’t see the above picture). This sandblasting process using new steel balls instead of sand may become a new processing surface, especially for stone varieties that are soft and have a more obvious effect.