Low-pressure sand casting machine consists of two pieces: holding furnace and liquid surface pressure control system. The furnace cover of holding furnace is used for work table for sand box. The prepared sand box fixed on the cover of holding furnace directly and then pressure casting.
    Fluid surface forcing control system adopts the high performance proportional valve +precision pressure sensors, which can examine the pressure of holding furnace and control real-time and closed loop feedback by PID accommodation mode. The system has multi-linear pressure, leakage compensation for holding furnace and leakage compensation for liquid surface. The setting add-pressure craft's curve can be tracked automatically.
     High precision control of pressure ensures the low press die casting process stable properties and good consistency.