本機是以磨料為工作介質，以壓縮空氣為動力，磨料和壓縮空氣在加壓罐內加壓后，再由砂閥處加速后，將磨料引射到噴槍內噴射到工件表面，達到預期的噴砂加工目的。
1.氣路工作原理
進入干噴砂機的壓縮空氣氣源分為二路：一路進入加壓罐，用于對磨料進行加壓，以完成噴砂加工，通過過濾器對壓縮空氣進行油、水過濾，通過減壓閥可調節進入噴槍的壓縮空氣壓力，通過電磁閥控制壓縮空氣的開啟和關閉；一路用于清理工件表面和噴砂艙內的滯砂(積灰)。
2.砂路工作原理
磨料預先放置在加壓罐中(打開機艙門，往機艙內加入15—25kg磨料)，當啟動氣路電磁閥后，加壓罐頂閥浮起，關閉加砂口，磨料在加壓罐內混合加壓后壓往下部調砂閥，在調砂閥處經壓縮空氣加速后噴射出噴槍，即可對工件進行噴砂加工。
3.除塵器工作原理
除塵器與分離器用吸塵管連接，當啟動除塵風機后，在噴砂機艙內形成負壓，外部空氣通過進氣口補充給噴砂艙，然后通過回砂管路進入分離器后再被除塵器風機抽入除塵器，如此形成了連續的氣體循環流動，在流動氣體的作用下，漂浮在噴砂艙內的粉塵隨著氣流沿連接管路進入除塵機組，經過過濾袋過濾后，落入集灰斗，經過過濾后的潔凈空氣通過除塵風機排風口排出；打開除塵箱底部的蓋即可收集粉塵。
中譯英：
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.
(圖/文http://m.zdrav.cn/)
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