Particle casting propellant casting liquid material flow stopping method

The invention provides a particle casting propellant casting liquid material flowing stopping method which comprises the following steps: step 1, fixing an assembled mold in a casting tank, keeping a Robert clamp in an open state, and fixing one end of a casting hose on a tail pipe of a mold bottom cover after penetrating through a fixing hole of the Robert clamp from bottom to top; 2, moving the Robert clamp to the position below the tail pipe, and connecting a casting hose with a switch to a casting liquid material container; thirdly, a casting pipeline switch is turned off, and the casting tank and the liquid material container are subjected to vacuum treatment for 4 h; 4, the vacuum degree in the liquid material container is reduced according to the technological procedure requirement, a casting pipeline switch is turned on, and the casting pipeline switch is turned off after the grain bed is filled with the casting liquid material; and 5, the pressure in the casting tank and the liquid material container