本机是以磨料为工作介质，以压缩空气为动力，磨料和压缩空气在加压罐内加压后，再由砂阀处加速后，将磨料引射到喷枪内喷射到工件表面，达到预期的喷砂加工目的。
1.气路工作原理
进入干喷砂机的压缩空气气源分为二路：一路进入加压罐，用于对磨料进行加压，以完成喷砂加工，通过过滤器对压缩空气进行油、水过滤，通过减压阀可调节进入喷枪的压缩空气压力，通过电磁阀控制压缩空气的开启和关闭；一路用于清理工件表面和喷砂舱内的滞砂(积灰)。
2.砂路工作原理
磨料预先放置在加压罐中(打开机舱门，往机舱内加入15—25kg磨料)，当启动气路电磁阀后，加压罐顶阀浮起，关闭加砂口，磨料在加压罐内混合加压后压往下部调砂阀，在调砂阀处经压缩空气加速后喷射出喷枪，即可对工件进行喷砂加工。
3.除尘器工作原理
除尘器与分离器用吸尘管连接，当启动除尘风机后，在喷砂机舱内形成负压，外部空气通过进气口补充给喷砂舱，然后通过回砂管路进入分离器后再被除尘器风机抽入除尘器，如此形成了连续的气体循环流动，在流动气体的作用下，漂浮在喷砂舱内的粉尘随着气流沿连接管路进入除尘机组，经过过滤袋过滤后，落入集灰斗，经过过滤后的洁净空气通过除尘风机排风口排出；打开除尘箱底部的盖即可收集粉尘。
中译英：
This machine is an abrasive as working medium, powered by compressed air, abrasive and compressed air in the pressure tank is pressurized, the sand valve after acceleration, abrasive jet to the spray gun spray the surface of the workpiece to achieve the desired goal, sandblasting processing.
1 air path principle
Into dry sand blasting machine, the compressed air source is divided into two road: a road into the pressurized tank, used for abrasive is pressurized, to complete the sandblasting processing, through the filter of the compressed air oil, water filtration, through the pressure relief valve can adjust the pressure of the compressed air into the spray gun, through the electromagnetic valve to control the compressed air opening and closing; a road into the gun, used for cleaning the workpiece surface and the sand blasting chamber and sand(ash).
2 working principle of sand road
Abrasive prepositioned in pressurized tank(open a door to the cabin, adding 15 to25kg abrasive), when the starting gas road after the solenoid valve, pressure tank top valve float, off the sand, abrasive in a pressurized mixture within the tank pressure to lower pressure regulating valve in sand, sand valve by compression air spray gun can be accelerated, the workpiece is sandblasting processing.
3 filter working principle
Dust collector and vacuum tube separator connected, when starting the dust fan, negative pressure is formed in the blast inside the cabin, the external air through the air inlet added to sandblasting cabinet, then back to the sand line entering the separator and then filter fan is sucked into the dust collector, so forming a continuous circulation of gas flow, the flow of gas under the action of blasting, floating in the cabin of the dust along with the airflow along the connecting line and into the filter bag dust removal unit, after filtering, fall into the hopper, filtered clean air through the dust removal fan exhaust outlet; the bottom of the box cover can open the dust collecting dust.
(图/文http://www.qitaibio.com/)
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