烘干砂型、砂芯用的喷灯,有时发现气化管路堵塞,堵塞的原因是汽油气化时产生一种质地较硬的炭黑,附着在管壁上,日久就把气化管路堵塞了。根据炭黑在高温通纯氧时可以燃烧的特点,我们把气化管路上各零件拆下,然后用氧-乙炔焊炬将其加热至650～700℃(注意加热温度过高能使焊 Drying sand, sand core with the torch, and sometimes found that the gasification pipeline is blocked, the reason for the blockage is the gasification of gasoline produces a hard texture of carbon black, attached to the pipe wall, a long time put the gasification pipeline Clogged. According to the characteristics of carbon black that can be burned when passing pure oxygen at high temperature, we remove the parts on the gasification pipe and then heat it to 650-700 ° C with oxygen-acetylene welding torch (note that the heating temperature is too high to make the welding