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Working principle of environmental sandblasting machine

2019-06-06

Principle of environmental sandblasting machine

Sand blasting is to use compressed air as the power to form a high-speed jet beam to spray materials (copper ore, quartz sand, emery, iron sand, Hainan sand, brown corundum, etc.) to the surface of the workpiece to be treated at high speed, so as to change the appearance or shape of the external surface of the workpiece. The surface of the workpiece will get a certain degree of cleanliness due to the impact and cutting effect of abrasive on the workpiece surface With different roughness, the mechanical properties of the surface of the workpiece are improved, so the fatigue resistance of the workpiece is improved, the adhesion between the workpiece and the coating is increased, the durability of the coating is prolonged, and it is also conducive to the leveling and decoration of the coating.

Sand blasting process

1. Sand blasting process pretreatment stage

The process pretreatment stage refers to the treatment that should be carried out on the workpiece surface before the workpiece is sprayed and sprayed with protective layer.

The quality of sand blasting pretreatment affects the adhesion, appearance, moisture resistance and corrosion resistance of the coating. If the pretreatment work is not well done, the rust will continue to spread under the coating, making the coating flake off. After careful cleaning of the surface and the general simple cleaning of the workpiece, with the exposure method for coating comparison, the life can be 4-5 times different. There are many methods of surface cleaning, but the common methods are: solvent cleaning, pickling, hand tools, power tools.

2 sand blasting process stage

The sand blasting process is to form a high-speed jet beam with compressed air as the power, spray materials and other high-speed jet to the surface of the workpiece to be treated, so that the appearance of the external surface of the workpiece changes. Due to the impact and cutting effect of abrasives from Shanghai sandblasting machine manufacturer on the surface of the workpiece, the surface of the workpiece gets certain cleanliness and different roughness, so that the mechanical properties of the workpiece surface are improved.

Classification of sandblasting machines

Sandblasting machine is widely used in abrasive jet. Sandblasting machine is generally divided into dry sandblasting machine and liquid sandblasting machine. Dry sandblasting machine can be divided into suction type and press type.

Suction dry sand blasting machine

1. General composition

A complete suction dry sand blasting machine is generally composed of six systems, i.e. structure system, medium power system, pipeline system, dust removal system, control system and auxiliary system.

2. Working principle

The suction type dry sand blasting machine is a negative pressure formed in the spray gun by the high-speed movement of the air flow, which uses the compressed air as the power to pass the abrasive through the sand conveying pipe.

Inhale the spray gun and shoot it out through the nozzle, and spray it to the machined surface to achieve the expected processing purpose. In the suction type dry sand blasting machine, compressed air is the supply.

Press in dry sand blasting machine

1. General composition

A complete working unit of press in dry sand blasting machine is generally composed of four systems, namely pressure tank, medium power system, pipeline system and control system.

2. Working principle of press in dry sand blasting machine.

The press in dry sand blasting machine is powered by compressed air, through the working pressure established in the pressure tank by compressed air, the abrasive will pass through the sand valve.

Press into the sand pipe and shoot out through the nozzle, spray to the surface to be processed to achieve the desired processing purpose. In the press in dry sand blasting machine, compressed air is the supply.

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Liquid sandblasting machine

Compared with the dry sandblasting machine, the liquid sandblasting machine has a great characteristic of controlling the dust pollution in the process of sandblasting and improving the working environment of sandblasting operation.

1. General composition

A complete liquid sandblasting machine is generally composed of five systems, namely, structure system, medium power system, pipeline system, control system and auxiliary system.

2. Working principle

The liquid sandblasting machine takes the grinding fluid pump as the feeding power of the grinding fluid, and transmits the evenly stirred grinding fluid (the mixture of abrasive and water) to the spray gun through the grinding fluid pump. As the acceleration power of the grinding fluid, compressed air enters the spray gun through the gas transmission pipe. In the spray gun, the compressed air accelerates the grinding fluid entering the spray gun, and shoots out through the nozzle, and sprays to the processed surface to achieve the expected processing purpose. In the liquid sandblasting machine, the grinding fluid pump is the feeding power, and the compressed air is the accelerating power.


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