An intelligent door opening and closing device for a holding furnace of a low-
pressure casting machine is characterized by comprising an intelligent recognition mechanism, a heat insulation furnace door mechanism, a
spinning mechanism, a door opening mechanism and a control mechanism. The high-temperature-resistant vacuum box which is slightly smaller than the liquid adding opening and provided with the glass surface is adopted to replace an existing
ceramic plate, the heat insulation effect of the heat insulation furnace door is improved, and
energy consumption is reduced; the six
spinning oil cylinders arranged on the furnace shell on the periphery of the liquid adding opening are used for pressing and sealing the heat-insulation furnace door, the pressure needed for pressing and sealing the heat-insulation furnace door is met, screw
spinning is replaced, air leakage of a sealing strip is avoided, and the requirement for
automation of pressing and sealing the heat-insulation furnace door is met; an
electric contact pressure gauge arranged on a heating
pipe housing on one side of the low-pressure furnace and an intelligent recognizer with a cooling fan and a cooling fan cover on an intelligent recognizer frame are adopted, and when the
electric contact pressure gauge confirms that the heat preservation furnace has no pressure and the intelligent recognizer confirms that the position of a liquid adding bag is correct, liquid is automatically added into the heat preservation furnace; the method is suitable for black lamp production, reduces the
casting production cost, and meets the requirements of black lamp production.