覆膜砂射芯機工作原理

       Working principle of film coated sand core ejection machine

       以磨液泵和壓縮空氣為動力，通過噴槍將磨液高速噴射到模具表面，達到光飾鑄造模具的目的。磨液是用對模具有保護作用的載液與一定粒度的磨料(白剛玉砂，玻璃丸等人造磨料)按一定配比混合而成，放置在機體下部的貯箱中。工作時磨液泵將貯箱中的磨液以一定壓力和流量通過磨液管路輸入噴槍。此時，還有一磨液旁路經(jīng)裝置在其中的攪拌噴嘴高速噴出，從而使貯箱中的磨料和載液攪拌均勻；另外壓縮空氣由外接氣源經(jīng)過(溢)減壓閥、電磁閥進入噴槍。噴槍是直接執(zhí)行液體噴吵工作的主要部件。它與磨液、壓縮空氣管路系統(tǒng)相連接，設置在機體上部密閉的工作艙內。噴射出的磨液對鑄造模具表面沖擊磨削后，從圓盤工作臺流下，經(jīng)網(wǎng)孔板返回貯箱，如此循環(huán)便完成了對鑄造模具的噴射清洗。

       With the grinding fluid pump and the compressed air as the motive force, the grinding liquid is sprayed high speed to the mold surface through a spray gun, so as to achieve the purpose of polishing the casting mold. The grinding fluid is mixed with a certain particle abrasive (white alumina sand, glass pellet and other artificial abrasives) by a certain proportion, which is protected by the mould, and placed in the tank at the bottom of the body. At work, the grinding fluid pump takes the grinding fluid in the tank to a certain pressure and flow through the grinding line into the spray gun. At the same time, there is a grinding fluid bypass, and the mixing nozzles in the device are spewed out at high speed, so that the abrasive and liquid in the tank are uniformly stirred. Besides, the compressed air is passed by the external air source through the overflow valve and the electromagnetic valve into the spray gun. The spray gun is the main component of the direct execution of the liquid noise. It is connected with the grinding fluid and the compressed air pipeline system, and is set in the closed cabin of the upper part of the body. After the grinding fluid was sprayed on the surface of the casting mold, the jet was washed down from the disk worktable and returned to the tank through the mesh plate, so that the spray cleaning of the casting mold was completed.